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Image photography apparatus, image reproducing apparatus, image photography and reproducing apparatus, stereographic projector, jig for image stereoscopic vision, and printer Number:7,385,625 from the United States Patent and Trademark Office (PTO) owispatent

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Title: Image photography apparatus, image reproducing apparatus, image photography and reproducing apparatus, stereographic projector, jig for image stereoscopic vision, and printer

Abstract: A liquid crystal display unit has a transmissive liquid crystal plate having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal plate from back. An interface circuit receives an image signal representative of a color image to sequentially form on said liquid crystal plate a plurality of separation images in which the color image is separated in association with the plurality of luminescent colors of said light source unit. The interface circuit causes said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal plate in synchronism with a sequential formation of the separation images onto said liquid crystal plate. Beams of light emanated from the light source unit and transmitted through the liquid crystal plate reproduce an image.

Patent Number: 7,385,625 Issued on 06/10/2008 to Ohmura,   et al.


Inventors: Ohmura; Hiroshi (Saitama, JP), Takamura; Masashi (Saitama, JP), Komatsuzaki; Hiroshi (Saitama, JP), Aosaki; Ko (Saitama, JP), Funaki; Akihiko (Saitama, JP), Murayama; Jin (Miyagi, JP)
Assignee: Fujifilm Corporation (Tokyo, JP)
Appl. No.: 10/732,510
Filed: December 11, 2003


Related U.S. Patent Documents

Application NumberFiling DatePatent NumberIssue Date
09922911Aug., 2001
09304844Nov., 20016314248

Foreign Application Priority Data

May 07, 1998 [JP] 10-124485
May 15, 1998 [JP] 10-133801

Current U.S. Class: 348/51
Field of Search: 348/51,52,60,61,47,42 396/429,326,324 359/464,466 358/302


References Cited [Referenced By]

U.S. Patent Documents
4262301 April 1981 Erlichman
4704119 November 1987 Shaw et al.
4836647 June 1989 Beard
5142357 August 1992 Lipton et al.
5727242 March 1998 Lo et al.
5760827 June 1998 Faris
5790184 August 1998 Sato et al.
5937212 August 1999 Kurahashi et al.
5995986 November 1999 Ueda et al.
6177952 January 2001 Tabata et al.
Foreign Patent Documents
12-4394 May., 1989 JP
6-83243 Mar., 1994 JP
8-271995 Oct., 1996 JP
Primary Examiner: Vo; Tung
Attorney, Agent or Firm: Young & Thompson

Parent Case Text



CROSS REFERENCE TO RELATED APPLICATIONS

This is a divisional of application Ser. No. 09/922,911, filed on Aug. 7, 2001 now abandoned, which is a division of application Ser. No. 09/304,844 filed May. 5, 1999, now U.S. Pat. No. 6,314,248, granted Nov. 6, 2001, the entire contents of which are hereby incorporated by reference.
Claims



What is claimed is:

1. A printer comprising: An exposing liquid crystal display unit having a transmissive liquid crystal panel having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal panel from back; an interface circuit for separating an entered color image signal to a plurality of color image signals associated with a plurality of luminescent colors of said light source unit, respectively, to sequentially form on said liquid crystal panel a plurality of separation images associated with the plurality of color image signals, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal panel in synchronism with a sequential formation of the separation images onto said liquid crystal panel; and an exposing optical system for magnifying and projecting an image formed on said exposing liquid crystal display unit to provide imaging on a sensitive plane of a sensitive material.

2. A printer according to claim 1, wherein said sensitive material is an instant film unit, and said printer has means for developing the instant film unit and discharging the same.

3. A printer according to claim 1, wherein said printer has an observing liquid crystal display unit for observing an image, in addition to said exposing liquid crystal display unit.

4. A printer according to claim 3, wherein said observing liquid crystal display unit is of a same type as said exposing liquid crystal display unit, wherein an observation is performed through an observing optical system.

5. A printer according to claim 3, wherein said observing liquid crystal display unit is of a different type from said exposing liquid crystal display unit, wherein an observation is performed directly or through an observing optical system.

6. A printer according to claim 3, wherein said observing liquid crystal display unit is of a different type from said exposing liquid crystal display unit, and is disposed between a pair of pressing members which press an instant film unit to an exposure position.

7. A printer according to claim 4, wherein said observing optical system comprises a magnifying lens for ejecting from an eyepiece window an image magnified from an image formed on the observing liquid crystal display unit.

8. A printer according to claim 5, wherein said observing optical system comprises a magnifying lens for ejecting from an eyepiece window an image magnified from an image formed on the observing liquid crystal display unit.

9. A printer according to claim 6, wherein said observing optical system comprises a magnifying lens for ejecting from an eyepiece window an image magnified from an image formed on the observing liquid crystal display unit.

10. A printer according to claim 7, wherein said magnifying lens is a Galilean optical system.

11. A printer according to claim 8, wherein said magnifying lens is a Galilean optical system.

12. A printer according to claim 9, wherein said magnifying lens is a Galilean optical system.

13. A printer according to claim 10, wherein said magnifying lens is a Keplerian optical system.

14. A printer according to claim 11, wherein said magnifying lens is a Keplerian optical system.

15. A printer according to claim 12, wherein said magnifying lens is a Keplerian optical system.

16. A printer according to claim 1, wherein two reflective mirrors are disposed between said liquid crystal display unit and the sensitive plane, and an exposing optical path is shaped as a Z-like.

17. A printer according to claim 1, wherein a reflective mirror is disposed between said liquid crystal display unit and the sensitive plane, and an exposing optical path is shaped as a L-like.

18. A printer according to claim 1, wherein said interface circuit has an operating frequency conversion unit for converting an inputted image signal into an image signal synchronized with an operating frequency of said exposing liquid crystal display unit.

19. A printer according to claim 1, wherein said interface circuit causes said light source unit to flash with a luminescent time shorter than a time for an image associated with the color image signal.

20. A printer according to claim 1, wherein said interface circuit repeatedly forms a frame of color images on said exposing liquid crystal display unit so that a frame of color images is continuously displayed.

21. A printer according to claim 1, wherein said printer further comprises image attitude correction means for correcting attitude of an image displayed on said exposing liquid crystal display unit so that an image formed on the sensitive material is observed in form of an erect image.

22. A printer comprising: An liquid crystal display unit having a transmissive liquid crystal panel having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal panel from back; an interface circuit for separating an entered color image signal to a plurality of color image signals associated with a plurality of luminescent colors of said light source unit, respectively, to sequentially form on said liquid crystal panel a plurality of separation images associated with the plurality of color image signals, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal panel in synchronism with a sequential formation of the separation images onto said liquid crystal panel; optical path switching means for switching between an exposing optical path for transmitting light of said light source unit transmitted through said liquid crystal panel to a sensitive plane of a sensitive material as a recording material and an observing optical path for transmitting light of said light source unit transmitted through said liquid crystal panel to an external observation window; an exposing optical system for magnifying and projecting an image formed on said liquid crystal display unit to provide imaging on a sensitive plane of a sensitive material; and an observing optical system for magnifying and projecting an image formed on said liquid crystal display unit onto the observation window through an observing optical path.

23. A printer according to claim 22, wherein said exposing optical system and said observing optical system are commonly used by a single imaging optical system disposed within an optical path in which the exposing optical path and the observing optical path are partially overlapped, and said imaging optical system is translated, operating together a switching operation of said optical path switching means, between a position in which an image formed on said liquid crystal display unit is imaged on the sensitive plane of the sensitive material and a position in which an image formed on said liquid crystal display unit is imaged on an observing screen provided on the observation window.

24. A printer according to claim 22, wherein said observing optical system is disposed within an optical path in which the exposing optical path and the observing optical path are partially overlapped, and at time of exposure onto the sensitive material said exposing optical system and said observing optical system are used to image an image formed on said liquid crystal display unit on the sensitive plane, and at time of projection of the image onto the observation window with magnification only said observing optical system is used.

25. A printer according to claim 22, wherein said observation window is an eyepiece window which is used for an observation in a state of eyepiece state, and said observing optical system comprises a magnifying lens for ejecting from an eyepiece window an image magnified from an image formed on the observing liquid crystal display unit.

26. A printer according to claim 25, wherein said magnifying lens is a Galilean optical system.

27. A printer according to claim 25, wherein said magnifying lens is a Keplerian optical system.

28. A printer according to claim 22, wherein two reflective mirrors are disposed between said liquid crystal display unit and the sensitive plane, and an exposing optical path is shaped as a Z-like.

29. A printer according to claim 22, wherein a reflective mirror is disposed between said liquid crystal display unit and the sensitive plane, and an exposing optical path is shaped as a L-like.

30. A printer according to claim 22, wherein said optical path switching means comprises a switching reflecting mirror disposed opposing against said liquid crystal display unit and movable a position in which light of said light source unit transmitted through said liquid crystal panel is reflected toward the exposing optical path and a position in which light of said light source unit transmitted through said liquid crystal panel is reflected toward the observing optical path.

31. A printer according to claim 30, wherein between said liquid crystal display unit and the sensitive plane said switching reflecting mirror and an exposing reflecting mirror are disposed to form a Z-like shaped exposing optical path, and between said liquid crystal display unit and the observation window said switching reflecting mirror and an observing reflecting mirror are disposed to form a L-like shaped observing optical path.

32. A printer according to claim 22, wherein said sensitive material is an instant film unit, and said printer has means for developing the instant film unit and discharging the same.

33. A printer according to claim 22, wherein said interface circuit has an operating frequency conversion unit for converting an inputted image signal into an image signal synchronized with an operating frequency of said exposing liquid crystal display unit.

34. A printer according to claim 22, wherein said interface circuit causes said light source unit to flash with a luminescent time shorter than a time for an image associated with the color image signal.

35. A printer according to claim 22, wherein said interface circuit repeatedly forms a frame of color images on said exposing liquid crystal display unit so that a frame of color images is continuously displayed.

36. A printer according to claim 22, wherein said printer further comprises image attitude correction means for correcting attitude of an image displayed on said exposing liquid crystal display unit so that an image formed on the sensitive material is observed in form of an erect image.

37. A printer according to claim 36, wherein said image attitude correction means operates or stops in operation working together an switching operation of said optical path switching means.
Description



BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an image photography apparatus suitable for photography of a three-dimensional image, an image reproducing apparatus suitable for reproduction of a three-dimensional image, an image photography and reproducing apparatus wherein the image photography apparatus and the image reproducing apparatus are formed in a unitary body, a stereographic projector for projecting an image for an image stereoscopic vision on a screen, a jig for image stereoscopic vision for visually recognizing the image projected on the screen in the form of a three-dimensional image, and a printer for printing an image displayed on a liquid crystal panel.

2. Description of the Prior Art

Hitherto, it is known that two still images or dynamic images are photographed through utilizing parallax of right and left eyes, and those images are reproduced to be observed by the respective right and left eyes, so that a three-dimensional image can be obtained.

In the event that such a stereographic photography and reproducing system is constructed, it is considered that an image is reproduced on a screen of a television. However, in the event that an exclusive system is constructed, it is considered that an image is reproduced on a liquid crystal display plate to provide an image stereoscopic vision. Adoption of the liquid crystal display plate make it possible to implement a compactness of a system whereby a portable system can be constructed.

A liquid crystal display plate, which is generally adopted for an image display, is a so-called TFT type of liquid crystal display plate. The TFT type of liquid crystal display plate is so arranged that a large number of pixels, which are arranged as a matrix and are separated into three primary colors of R, G and B, are used to simultaneously generate three images associated with the three primary colors of R, G and B, respectively, so that the images can be observed through illumination from the back of the liquid crystal display plate.

In an equipment provided with a liquid crystal display function for displaying an image on the TFT type of liquid crystal display plate, particularly, for purpose of the portable use, space for the liquid crystal display plate is restricted. According to the TFT type of liquid crystal display plate, the respective pixels for the colors R, G and B are arranged at regular intervals, and thus the substantial number of pixels becomes 1/3 of the total number of pixels. This brings about a defect of poor precision. Further, in view of the characteristics of the TFT type of liquid crystal display plate, it is hard to obtain an excellent resolution. Thus, it is difficult to obtain a fine image to be displayed on the liquid crystal display plate. Accordingly, it will be impossible to read characters written in a fine line, for example. Furthermore, a light source for illuminating the TFT type of liquid crystal display plate is large in power consumption. The TFT type of liquid crystal display plate has such a merit that it is possible to display an image, whereas it has demerits as mentioned above.

Further, hitherto, there is known a so-called liquid crystal projector in which an image is reproduced on a liquid crystal display plate in accordance with image information subjected to a digital image processing, and the liquid crystal display plate is projected onto a screen via a projection lens through irradiation on the liquid crystal display plate from the back thereof.

A liquid crystal display plate, which is generally adopted for an image display, is a so-called TFT type of liquid crystal display plate. The TFT type of liquid crystal display plate is so arranged that a large number of pixels, which are arranged as a matrix and are separated into three primary colors of R, G and B, are used to simultaneously generate three images associated with the three primary colors of R, G and B, respectively, so that the images can be observed through illumination from the back of the liquid crystal display plate.

However, as mentioned above, according to the TFT type of liquid crystal display plate, the respective pixels for the colors R, G and B are arranged at regular intervals, and thus the substantial number of pixels becomes 1/3 of the total number of pixels. This brings about a defect of poor precision. Further, in view of the characteristics of the TFT type of liquid crystal display plate, it is hard to obtain an excellent resolution. Thus, it is difficult to obtain a fine image to be displayed on the liquid crystal display plate. Accordingly, it will be impossible to read characters written in a fine line, for example. Furthermore, a light source for illuminating the TFT type of liquid crystal display plate is large in power consumption. The TFT type of liquid crystal display plate has such a merit that it is possible to display an image, whereas it has demerits as mentioned above.

Further, hitherto, it is known that a three-dimensional image can be obtain by reproducing two still image and dynamic image utilizing a parallax of right and left eyes in such a manner that those images are observed by the right and left eyes. In this case, however, in the event that an image for stereoscopic vision is projected onto a screen, it is a problem as to how a high definition of image for stereoscopic vision is projected.

Furthermore, hitherto, there are on the market various types of printer in which an image photographed by a video camera or a digital still camera, and a full color image such as a print photograph obtained by a general camera, are converted into a digital image signal and printed. Of those types of printer, there is, as disclosed in Japanese Patent Publication Hei. 1-24394, Japanese Patent Application Laid Open Gazette Hei. 6-83243, and Japanese Patent Application Laid Open Gazette Hei. 8-271995, such a type of printer that a photosensitive material is used as a recording material, and while a recording head, in which microscopic emitters sequentially emitting beams of light of three primary colors are incorporated, is scanned throughout a photosensitive surface, a full color image is exposed on the photosensitive surface with the beams emitted from the microscopic emitters. This type of printer can be miniaturized, since power dissipation is small.

In the above-mentioned color printer, in order to obtain an enhanced print free from color drift or shift and fuzziness, there are needed a recording head into which microscopic emitters for emitting beams of light of a suitable quantity of light, and optical means for focussing the beams emitted from the microscopic emitters on a photosensitive surface with great accuracy, etc. are incorporated, and recording head moving means for moving the recording head with great accuracy.

However, optical means, which is capable of being used for focussing of the microscopic emitters incorporated into the recording head, is limited. That is, such an optical means needs a distributed index lens and microscopic lenses formed through molding optical material, which are expensive, and thus cannot be used for an inexpensive printer. Likely, the use of the recording head moving means involves a cost up for the printer, and also hinders miniaturization and weight saving of the printer. Further, a decrease of a moving speed of the recording head involves a problem that a printing time is elongated.

In the event that a portable printer, which can be driven by a battery and the like, is constructed, it is considered that as a monitor for confirming an image to be printed, a liquid crystal display is incorporated into the printer. However, an incorporation of the liquid crystal display involves a problem of a cost up of the printer. Further, the liquid crystal display is large in power dissipation. Accordingly, in the event that the back light and the like is used in order that it is easy to see an image, this involves a problem that the battery is readily wasted.

SUMMARY OF THE INVENTION

In view of the foregoing, it is an object of the present invention to provide a compact image reproducing apparatus capable of observing an enhanced image, an image photography apparatus capable of photographing an image suitable for the image reproduction by the above-mentioned image reproducing apparatus, and an image photography and reproducing apparatus wherein the image photography apparatus and the image reproducing apparatus are formed in a unitary body.

It is another object of the present invention to provide a stereographic projector for projecting a high definition image for stereoscopic vision on a screen and a jig for visually recognizing the image projected on the screen in the form of a three-dimensional image.

It is still another object of the present invention to provide a printer capable of obtaining an enhanced printer in compactness, weight saving, and low cost.

To achieve the above-mentioned objects, the present invention provides an image photography apparatus comprising:

a pair of image taking lenses in right and left;

at least one image receiving device for receiving an image formed by said pair of image taking lenses to generate an image signal representative of a color image;

an image receiving device driving unit for driving said image receiving device to receive the image;

a recording medium driving unit onto which a portable recording medium is detachably loaded for recording image information on the recording medium loaded; and

a control unit for controlling both said image receiving device driving unit and said recording medium driving unit to cause said image receiving device driving unit to drive said image receiving device so that image information associated with the image signal generated is recorded on the loaded recording medium.

According to the image photography apparatus of the present invention, there provided a pair of image taking lenses in right and left, and image information representative of an image formed through the image taking lenses is recorded on a portable recording medium. This feature makes it possible to readily obtain a three-dimensional image.

In the image photography apparatus as mentioned above, it is preferable that said control unit controls both said image receiving device driving unit and said recording medium driving unit so as to obtain a three-dimensional still image consisting of a pair of still images formed by said pair of image taking lenses. It is also preferable that said control unit controls both said image receiving device driving unit and said recording medium driving unit so as to obtain a three-dimensional dynamic image consisting of a pair of dynamic images formed by said pair of image taking lenses.

The image photography apparatus according to the present invention is applicable to both a three-dimensional still image and a three-dimensional dynamic image.

In case of an arrangement wherein a three-dimensional dynamic image is obtained, it is preferable that said control unit controls both said image receiving device driving unit and said recording medium driving unit so as to obtain a three-dimensional image which is altered at a speed of 16 frames per second or more.

According to characteristics of human eyes, when an image is sequentially altered at a speed of 16 frames per second or more, it is recognized as a dynamic image.

In the image photography apparatus as mentioned above, it is acceptable that said recording medium driving unit permits only one recording medium to be loaded at a time, and records images formed by said image receiving device on the loaded one recording medium. And alternatively it is acceptable that said recording medium driving unit permits two recording media to be loaded at a time, and records images formed by said image receiving device on the loaded two recording media, respectively.

In the event that only one recording medium is loaded and both the right and left images are recorded onto the loaded recording medium, it is convenient to handle the recording medium. On the other hand, in the event that two recording media are loaded and the right and left images are recorded onto the loaded two recording media, respectively, the respective recording media are used on a common basis among photography and reproducing systems for usual images which are not involved in a three-dimensional image.

Further, to achieve the above-mentioned objects, the present invention provides an image reproducing apparatus comprising:

a liquid crystal display unit having a transmissive liquid crystal plate having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal plate from back;

an interface circuit for receiving an image signal representative of a color image to sequentially form on said liquid crystal plate a plurality of separation images in which the color image is separated in association with the plurality of luminescent colors of said light source unit, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal plate in synchronism with a sequential formation of the separation images onto said liquid crystal plate;

a pair of eyepiece window through which a person looks with one's right and left eyes; and

an image reproducing optical system for transmitting to said pair of eyepiece window outgoing light carrying the image formed on said liquid crystal plate, the outgoing light being emitted from said liquid crystal display unit.

The use of the interface circuit as mentioned above makes it possible to form an image using the whole pixels of the liquid crystal plate with respect to any image of a plurality of colors (e.g. R, G, B), and thereby forming enhanced color image as compared with the conventional one using the TFT type of liquid crystal plate.

In the image reproducing apparatus as mentioned above, it is preferable that said interface circuit forms on a time division basis on said liquid crystal plate a plurality of separation images consisting of a plurality of left eye use separation images in which left eye use color images are separated and a plurality of right eye use separation images in which right eye use color images are separated, and,

said image reproducing optical system has in its optical path a transmission control member to provide such a control that in a timing wherein the left eye use separation images are formed on said liquid crystal plate, the outgoing light emitted from said liquid crystal display unit is transmitted to a left eye use eyepiece window of said pair of eyepiece windows, while the outgoing light is prevented from being transmitted to a right eye use eyepiece window, and in a timing wherein the right eye use separation images are formed on said liquid crystal plate, the outgoing light emitted from said liquid crystal display unit is transmitted to the right eye use eyepiece window, while the outgoing light is prevented from being transmitted to the left eye use eyepiece window.

In this case, it is acceptable that said transmission control member is a pair of liquid crystal shutters associated with said pair of eyepiece windows.

This feature as to separation of an image to the right and left makes it possible to reproduce a three-dimensional image.

In the image reproducing apparatus as mentioned above, it is preferable that when a plurality of separation images consisting of a plurality of separation images constituting a frame of color images for left eye use and a plurality of separation images constituting a frame of color images for right eye use is expressed in form of one group, said interface circuit alters a separation image on said liquid crystal plate at a speed of 16 groups per second or more, and causes said light source unit to flash in synchronism with a sequential formation of the separation images onto said liquid crystal plate so as to generate a pulse light having a luminescent time shorter than a time while a one separation image is formed on said liquid crystal plate.

As mentioned above, it is known that according to characteristics of the human eyes, when an image is sequentially altered at a speed of 16 frames per second or more, it is recognized as a dynamic image. According to the image reproducing apparatus of the present invention, a frame of images (color image) on each of the right and left are further separated into a plurality of separation images, and thus there is a need to alter an image at higher speed. However, as a standard of the altering speed, when a plurality of separation images constituting total two frames of color images of one frame on each of right and left is expressed in the form of one group, the alteration speed is of 16 frames per second or more. This feature makes it possible to form a dynamic image which is smooth in movement.

Further, the light source unit flash so as to generate a pulse light having a luminescent time shorter than a time while a one separation image is formed on said liquid crystal plate. This feature make it possible to suppress a power dissipation.

In an arrangement that an image formed on the liquid crystal plate is separated into the right and the left, it is acceptable that said interface circuit receives a frame of image signals representative of a still color image for left eye use and a frame of image signals representative of still color image for right eye use, and repeatedly forms on said liquid crystal plate a plurality of separation images consisting of a plurality of separation images for left eye use constituting a still color image for left eye use and a plurality of separation images for right eye use constituting a still color image for right eye use.

An arrangement that an image formed on the liquid crystal plate is separated into the right and the left is also applicable to an image reproducing apparatus for reproducing a still color image.

In the image reproducing apparatus as mentioned above, it is preferable that said image reproducing apparatus has two said liquid crystal display units for left eye use and right use, respectively,

said interface circuit forms on a time division basis on a liquid crystal plate for left eye use constituting said liquid crystal display unit for left eye use a plurality of left eye use separation images in which left eye use color images are separated, and forms on a time division basis on a liquid crystal plate for right eye use constituting said liquid crystal display unit for right eye use a plurality of right eye use separation images in which right eye use color images are separated, and

said image reproducing optical system comprises a left eye use image reproducing optical system in which an outgoing light for left eye emitted from said liquid crystal display unit for left eye is transmitted to a left eye use eyepiece window of said pair of eyepiece windows, and a right eye use image reproducing optical system in which an outgoing light for right eye emitted from said liquid crystal display unit for right eye is transmitted to a right eye use eyepiece window of said pair of eyepiece windows.

In this case, when a three-dimensional image is reproduced, there is a need to prepare two liquid crystal display units. However, there is no need to prepare the liquid crystal shutter, the transmission control member for separating an image to the right and the left, the synchronizing circuit for separation, the driving circuit, etc.

In an arrangement that two liquid crystal display units are provided, it is preferable that when a plurality of separation images constituting a frame of color images provided for one of the left eye and the right eye is expressed in form of one group, said interface circuit alters a separation image on said liquid crystal plate for left eye use and a separation image on said liquid crystal plate for right eye use at a speed of 16 groups per second or more, respectively, and causes each light source unit irradiating an associated liquid crystal plate to flash in synchronism with a sequential formation of the separation images onto the associated liquid crystal plate so as to generate a pulse light having a luminescent time shorter than a time while a one separation image is formed on the associated liquid crystal plate.

In case of an arrangement that two liquid crystal display units are provided, as compared with an arrangement that an image displayed on the liquid crystal plate is separated into the right eye and the left eye, as mentioned above, it is effective, in order to provide an image which looks like altered at the same speed for the human eyes, that an image is altered at half speed on the liquid crystal plate. This feature makes it possible to contribute to cost down or alternatively to provide a dynamic image which is more smooth in movement.

In an arrangement that two liquid crystal display units are provided, it is acceptable that said interface circuit receives a frame of image signals representative of a still color image for left eye use and a frame of image signals representative of still color image for right eye use, and repeatedly forms on said liquid crystal plate for left eye use a plurality of separation images for left eye use constituting a still color image for left eye use and repeatedly forms on said liquid crystal plate for right eye use a plurality of separation images for right eye use constituting a still color image for right eye use.

Also in an arrangement that two liquid crystal display units are provided, in a similar fashion to that of an arrangement that an image displayed on the liquid crystal plate is separated into the right eye and the left on a time division basis, as mentioned above, it is possible to apply the arrangement to an image reproducing apparatus for reproducing a still color image.

Here, in the image reproducing apparatus according to the present invention, it is preferable that said image reproducing apparatus further comprises a recording medium driving unit onto which a portable recording medium is detachably loaded for transmitting an image signal from the loaded recording medium to said interface circuit.

An arrangement that a portable recording medium is loaded to obtain an image signal makes it possible to easily take in an image.

In this case, it is acceptable that said recording medium driving unit permits only one recording medium to be loaded at a time, and said recording medium driving unit receives from the loaded one recording medium both an image signal representative of a color image for left eye and an image signal representative of a color image for right eye, and transmits those image signals to said interface circuit. Or alternatively, it is acceptable that said recording medium driving unit permits two recording media to be loaded at a time, and said recording medium driving unit receives from one of the loaded two recording media an image signal representative of a color image for left eye and from another recording medium an image signal representative of a color image for right eye, and transmits those both image signals to said interface circuit.

In the event that only one recording medium is loaded to take in both images of the right and the left from the loaded recording medium, a single recording medium can be used. Thus it is convenient to handle the recording medium. On the other hand, in the event that two recording media are loaded to obtain the right and left images from the loaded two recording media, respectively, the respective recording media are used on a common basis among recording media used in the usual photography apparatus which are not involved in a three-dimensional image, for example, a digital camera, a video photography apparatus. Thus, it is possible that for example, two digital cameras are used to record the right and left images onto two recording media, respectively, and the two recording media are loaded onto an image reproducing apparatus of type capable of loading two recording media so that a three-dimensional image is reproduced.

In the image reproducing apparatus according to the present invention as mentioned above, it is preferable that said image reproducing apparatus further comprises a receiving unit for receiving radio wave or infrared carrying image information to generate an image signal and to transmit the image signal thus generated to said interface circuit.

In this manner, it is acceptable that the apparatus is arranged in such a manner that an image signal is obtained in the form of radio wave or infrared.

In the image reproducing apparatus according to the present invention as mentioned above, it is preferable that said interface circuit has an operating frequency conversion unit receiving an image signal having a first operating frequency different from a second operating frequency for operating said liquid crystal display unit for converting the image signal into an image signal synchronized with the second operating frequency.

In the event that an image signal and other various type of signals are dealt with, it is generally performed that a predetermined operating frequency of clock is established as a reference clock, a signal of type synchronized with the reference clock is dealt with. As an operating frequency generally adopted, for example, 24.5 MHz, 14 MHz, 12.27 MHz are adopted. However, there is a possibility that the operating frequency optimum to the liquid crystal display unit is not coincident with the operating frequency generally adopted as mentioned above. In view of the foregoing, according to the present invention, the above-referenced interface circuit has the above-referenced operating frequency conversion unit. This feature makes it possible to receive an image signal synchronized with the operating frequency generally adopted, for example, 24.5 MHz, and convert the same to the operating frequency optimum to the liquid crystal display unit to display an image.

In the image reproducing apparatus according to the present invention as mentioned above, it is preferable that said image reproducing apparatus further comprises an image attitude correction circuit for correcting an attitude of an image so that an image provided by light emitted from said light source unit and transmitted through said liquid crystal plate is observed in form of an erect image.

The image attitude correction circuit is incorporated into the interface circuit, or alternatively is located before or after the interface circuit. This image attitude correction circuit serves as a circuit in which for example, an image inverted with respect to the right and left and an image reversed with respect to the top and bottom are formed on the liquid crystal plate by a signal processing, so that an image attitude is corrected in such a manner that those images are finally observed as an erect image for human eyes. The image attitude correction circuit is needed in the event that an image on the liquid crystal plate is observed for the human eyes in the form of a reverse image.

To achieve the above-mentioned objects, the present invention provides an image photography and reproducing apparatus comprising:

a pair of image taking lenses in right and left;

at least one image receiving device for receiving an image formed by said pair of image taking lenses to generate an image signal representative of a color image;

an image receiving device driving unit for driving said image receiving device to receive the image;

a recording medium driving unit onto which a portable recording medium is detachably loaded for recording image information on the recording medium loaded;

a liquid crystal display unit having a transmissive liquid crystal plate having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal plate from back;

an interface circuit for receiving an image signal representative of a color image to sequentially form on said liquid crystal plate a plurality of separation images in which the color image is separated in association with the plurality of luminescent colors of said light source unit, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal plate in synchronism with a sequential formation of the separation images onto said liquid crystal plate;

a pair of eyepiece window through which a person looks with one's right and left eyes;

an image reproducing optical system for transmitting to said pair of eyepiece window outgoing light carrying the image formed on said liquid crystal plate, the outgoing light being emitted from said liquid crystal display unit; and

a control unit for causing image information associated with the image signal generated from said image receiving device to be recorded on the loaded recording medium, and for causing image signal obtained from the recording medium to be transmitted to said interface circuit.

The image photography and reproducing apparatus of the present invention has both the features of the image photography apparatus of the present invention and the image reproducing apparatus of the present invention. This feature makes it possible to be more convenient to deal with the apparatus as compared with a case where the image photography apparatus and the image reproducing apparatus are separately provided.

Incidentally, with respect to the image photography and reproducing apparatus of c, only a basic structural arrangement of the apparatus is raised. It is noted, however, that the image photography and reproducing apparatus of the image photography and reproducing apparatus includes combinations of all the aspects of the image photography apparatus and all the aspects of the image reproducing apparatus.

As mentioned above, according to the present invention, it is possible to provide an image reproducing apparatus capable of observing a high definition of image, an image photography apparatus capable of photographing an image suitable for an image reproduction by the image photography apparatus, and an image photography and reproducing apparatus of a combination of the image reproducing apparatus and the image photography apparatus.

Further, according to the present invention, provision of a liquid crystal display unit adopting a transmissive matrix drive-type liquid crystal plate, which is improved in compactness, power saving, resolution and responsibility, and an interface circuit suitably driving such a liquid crystal display unit makes it possible to obtain an enhanced image. Further, since this combination makes it possible to implement the enhanced image, it is possible to discriminate and observe not only an image but also fine character information. Furthermore, it is possible to reduce a power dissipation, and thus it is possible to use an image reproducing apparatus in which a battery is a main power source or an image photography and reproducing apparatus without exchange of a battery for a long time.

Still further, according to the present invention, wide choices of an image reproduction optical system may be given, and thus it is possible to obtain a great freedom for selecting a form or type suitable for an object of an image reproducing apparatus or an image photography and reproducing apparatus.

To achieve the above-mentioned objects, the present invention provides a stereographic projector comprising:

a liquid crystal display unit having a transmissive liquid crystal plate having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal plate from back;

an interface circuit for receiving an image signal representative of a color image for left eye use and an image signal representative of a color image for right eye use to sequentially form on said liquid crystal plate a plurality of separation images consisting of a plurality of separation images for left eye use and a plurality of separation images for right eye use wherein each of the color image for left eye use and the color image for right eye is separated in association with the plurality of luminescent colors of said light source unit, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal plate in synchronism with a sequential formation of the separation images onto said liquid crystal plate;

a projection optical system for emitting outside light emanated from said light source unit and transmitted through said liquid crystal plate to project an image displayed on said liquid crystal plate onto an external screen; and

a timing signal generating circuit for generating a timing signal to discriminate a timing wherein a separation image for left eye use is formed on said liquid crystal plate and a timing wherein a separation image for right eye use is formed on said liquid crystal plate.

According to the above-mentioned stereographic projector of the present invention, beams of light transmitted through the liquid crystal plate is emitted outside, and an image displayed on said liquid crystal plate is projected onto an external screen. And, alternatively, it is acceptable that the stereographic projector has a screen per se.

As a stereographic projector having such an arrangement, there is provided a stereographic projector comprising:

a liquid crystal display unit having a transmissive liquid crystal plate having a number of pixels arranged on a two-dimensional basis, on which an image is formed, and a light source unit emitting beams of light of a plurality of luminescent colors for irradiating said liquid crystal plate from back;

an interface circuit for receiving an image signal representative of a color image for left eye use and an image signal representative of a color image for right eye use to sequentially form on said liquid crystal plate a plurality of separation images consisting of a plurality of separation images for left eye use and a plurality of separation images for right eye use wherein each of the color image for left eye use and the color image for right eye is separated in association with the plurality of luminescent colors of said light source unit, said interface circuit causing said light source unit to flash with a luminescent color associated with a separation image formed on said liquid crystal plate in synchronism with a sequential formation of the separation images onto said liquid crystal plate;

a screen on which light emanated from said light source unit and transmitted through said liquid crystal plate is projected;

a projection optical system for projecting an image displayed on said liquid crystal plate onto said screen; and

a timing signal generating circuit for generating a timing signal to discriminate a timing wherein a separation image for left eye use is formed on said liquid crystal plate and a timing wherein a separation image for right eye use is formed on said liquid crystal plate.

Further, it is acceptable that a stereographic projector according to the present invention serves both as a type in which an image is projected onto an external screen and another type having an internal screen per se in which an image is projected onto the internal screen. In this case, there is provided such an arrangement that the stereographic projector further comprises optical path switching means for switching between an optical path for projecting the light emanated from said light source unit and transmitted through said liquid crystal plate to said screen and an optical path for projecting the light emanated from said light source unit and transmitted through said liquid crystal plate to an external screen.

Here, as a typical structural example of the stereographic projector according to the present invention, there is provided such an arrangement that the light source unit of said liquid crystal display unit emits beams of light of three primary colors of red, green and blue, and

said interface circuit separates an color image for left eye into three separation images associated with red, green and blue per frame, respectively, and separates an color image for right eye into three separation images associated with red, green and blue per frame, respectively, so that total six separation images per frame are sequentially formed on said liquid crystal plate.

Further, as a typical structural example of the stereographic projector according to the present invention, there is provided such an arrangement that the timing signal generated in said timing signal generating circuit is outputted to the exterior, and an image is visually recognized in the form of a three-dimensional image by an observer who mounts a jig for image stereoscopic vision which will be described later. In this case, it is acceptable that the timing signal generated in said timing signal generating circuit is directly outputted to the exterior in the form of an electric signal, or alternatively it is acceptable that said stereographic projector further comprises a timing signal output circuit for outputting radio wave or infrared carrying the timing signal generated in said timing signal generating circuit.

For example, a form wherein a jig for image stereoscopic vision which will be described later is incorporated into a stereographic projector, or a form including an arrangement corresponding to such a jig for image stereoscopic vision, may be referred to as a stereographic projector. That is, in such a stereographic projector, said stereographic projector further comprises an image transmission control unit disposed between right and left eyes of an observer and said screen for providing based on the timing signal generated in said timing signal generating circuit such a control that in a timing wherein the left eye use separation images are formed on said liquid crystal plate, an image on said screen is transmitted to the left eye of the observer, while an optical path extending to the right eye of the observer is blocked, and in a timing wherein the right eye use separation images are formed on said liquid crystal plate, the image on said screen is transmitted to the right eye of the observer, while an optical path extending to the left eye of the observer is blocked.

It is preferable that said image transmission control unit comprises:

a pair of liquid crystal shutters for left eye use and right eye use, which are controlled in accordance with the timing signal so as to alternately offer a light transmissive state and a light blocking state; and

a holding member for holding said pair of liquid crystal shutters, said holding member having mounting means which can be mounted on the observer in such a manner that the liquid crystal shutter for left eye use and the liquid crystal shutter for right eye use are set before the left eye and the right eye of the observer, respectively.

When a jig for image stereoscopic vision is recognized as one which is not integral with a stereographic projector, the present invention provides a jig for image stereoscopic vision comprising:

mounting means to be mounted on an observer in such a manner that said mounting means is located before eyes of the observer; and

an image transmission control unit receiving a timing signal to discriminate a timing wherein an image is provided to left eye of the observer and a timing wherein an image is provided to right eye of the observer for providing based on the timing signal generated in said timing signal such a control that in the timing wherein an image is provided to left eye of the observer, a view of left eye of the observer is ensured, while a view of right eye of the observer is blocked, and in the timing wherein an image is provided to right eye of the observer, a view of right eye of the observer is ensured, while a view of left eye of the observer is blocked.

In the jig for image stereoscopic vision as mentioned above, it is preferable that said an image transmission control unit has a liquid crystal shutter for left eye use and the liquid crystal shutter for right eye use, which are set before the left eye and the right eye of the observer, respectively, when the observer mounts said jig, and said liquid crystal shutters for left eye use and right eye use are controlled in accordance with the timing signal so as to alternately offer a light transmissive state and a light blocking state.

In the jig for image stereoscopic vision as mentioned above, it is also preferable that said jig comprises a timing signal receiving unit for receiving radio wave or infrared carrying the timing signal.

The use of the interface circuit regarding the stereoscopic projector as mentioned above makes it possible to form an image using the whole pixels of the liquid crystal plate with respect to any image of a plurality of colors (e.g. R, G, B), and thereby forming enhanced color image as compared with the conventional one using the TFT type of liquid crystal plate.

Further, according to the stereoscopic projector of the present invention, there are provided a timing signal generating circuit for generating a timing signal to discriminate a timing wherein a separation image for left eye use is formed on said liquid crystal plate and a timing wherein a separation image for right eye use is formed on said liquid crystal plate; and image transmission control unit disposed between right and left eyes of an observer and said screen for providing based on the timing signal generated in said timing signal generating circuit such a control that in a timing wherein the left eye use separation images are formed on said liquid crystal plate, an image on said screen is transmitted to the left eye of the observer, while an optical path extending to the right eye of the observer is blocked, and in a timing wherein the right eye use separation images are formed on said liquid crystal plate, the image on said screen is transmitted to the right eye of the observer, while an optical path extending to the left eye of the observer is blocked. This feature makes it possible for an observer to visually recognize an image in the form of a three-dimensional image utilizing the after-image phenomenon of eyes.

That is, the present invention utilize the after-image phenomenon of eyes for recognition of both a color image and a three-dimensional image.

Here, when a timing signal generated the stereographic projector is outputted to the exterior, and the timing signal is received by a jig for image stereographic vision, the timing signal is received through infrared or radio wave. This is convenient since there is no need to provide a code.

In the stereographic projector according to the present invention, it is preferable that when a plurality of separation images consisting of a plurality of separation images constituting a frame of color images for left eye use and a plurality of separation images constituting a frame of color images for right eye use is expressed in form of one group, said interface circuit alters a separation image on said liquid crystal plate at a speed of 16 groups per second or more, and causes said light source unit to flash in synchronism with a sequential formation of the separation images onto said liquid crystal plate so as to generate a pulse light having a luminescent time shorter than a time while a one separation image is formed on said liquid crystal plate.

It is known that according to characteristics of the human eyes, when an image is sequentially altered at a speed of 16 frames per second or more, it is recognized as a dynamic image. According to the image reproducing apparatus of the present invention, a frame of images (color image) on each of the right and left are further separated into a plurality of separation images, and thus there is a need to alter an image at higher speed. However, as a standard of the altering speed, when a plurality of separation images constituting total two frames of color images of one frame on each of right and left is expressed in the form of one group, the alteration speed is of 16 frames per second or more. This feature makes it possible to form a dynamic image which is smooth in movement.

Further, the light source unit flash so as to generate a pulse light having a luminescent time shorter than a time while a one separation image is formed on said liquid crystal plate. This feature make it possible to suppress a power dissipation.

In the stereographic projector according to the present invention as mentioned above, it is acceptable that said interface circuit rec


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