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Terminal with projection display Number:7,385,620 from the United States Patent and Trademark Office (PTO) owispatent

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Title: Terminal with projection display

Abstract: A mobile data and/or communication terminal is provided which includes an optical system for the generation of a projected display as well as parts for stabilizing the display when the terminal is moved.

Patent Number: 7,385,620 Issued on 06/10/2008 to Werner


Inventors: Werner; Marco (Munchen, DE)
Assignee: Palm, Inc. (Sunnyvale, CA)
Appl. No.: 10/381,776
Filed: September 28, 2000
PCT Filed: September 28, 2000
PCT No.: PCT/DE00/03415
371(c)(1),(2),(4) Date: September 15, 2003
PCT Pub. No.: WO02/27387
PCT Pub. Date: April 04, 2002


Current U.S. Class: 348/14.02 ; 348/14.07; 353/122; 455/556.1
Field of Search: 348/14.01-14.09,14.1-14.12,14.13,14.16 353/39,119,122,29 455/556.1,556.2,575.1


References Cited [Referenced By]

U.S. Patent Documents
3531176 September 1970 Humphrey
3577205 May 1971 Hobrough
3910693 October 1975 De La Cierva
4290684 September 1981 Hines
5280387 January 1994 Maruyama
5606456 February 1997 Nagata et al.
5949087 September 1999 Cooper
5978601 November 1999 Masumoto et al.
6371616 April 2002 Doany et al.
6694096 February 2004 Imada
Foreign Patent Documents
0 004 813 Oct., 1979 EP
0 909 087 Apr., 1999 EP
409327007 Dec., 1997 JP
2000050360 Feb., 2000 JP
2000221954 Aug., 2000 JP
Primary Examiner: Ramakrishnaiah; Melur
Attorney, Agent or Firm: Bell, Boyd & Lloyd LLP

Claims



The invention claimed is:

1. A terminal, comprising: an optical apparatus for generating a projected display; at least one sensor that detects physical movement of the terminal; and a processor that processes an output from the sensor to determine a position of the terminal resulting from the physical movement, wherein the processor compensates the optical apparatus to stabilize the displacement of the projected display based on the determined position.

2. The terminal as claimed in claim 1, wherein the terminal is one of a mobile data terminal and a communication terminal.

3. The terminal as claimed in claim 1, wherein the processor is activated via a switch on the terminal.

4. The terminal as claimed in claim 1, further comprising an apparatus for emitting a light beam as a pointing agent in the projected display.

5. The terminal as claimed in claim 1, further comprising a camera for recording at least segments of the projected display.

6. A method for stabilizing a projection from a terminal, comprising the steps of: generating a projected display through an optical apparatus in the terminal; detecting physical movement of the terminal; and processing the detected physical movement to determine a position of the terminal and compensating the optical apparatus to stabilize the displacement of the projected display, based on the determined position.

7. The method according to claim 6, wherein the terminal is one of a mobile data terminal and a communication terminal.

8. The method according to claim 6, wherein the steps of processing the detected physical movement and compensating the optical apparatus are performed after receiving an input from a switch on the terminal.

9. The method according to claim 6, further comprising the step of emitting a light beam as a pointing agent in the projected display.

10. The method according to claim 6, further comprising the step of recording at least segments of the projected display via a camera located on the terminal.
Description



BACKGROUND OF THE INVENTION

The present invention relates to a mobile data or communication terminal. Such a terminal is, for example, a mobile video telephone or a mobile video camera for still or moving images. The terminal also can be a mobile small computer.

Various methods are currently used in video cameras for stabilizing images. FIG. 1 shows one such method, in which movable lenses are used. In this method, an object OB is recorded by a recording device AE; for example, a video camera. The recording device AE has an image sensor BS; for example, a CMOS chip. The recording device AE has an optical system or a lens system OT via which the object OB is mapped to the image sensor BS.

Upon movement of the recording device AE, different image segments BA are produced, as shown by the solid and the broken lines. The recording device AE has motion sensors, which are not shown in detail, which record this movement and move the optical system OT so as to stabilize the image. Stabilization of the image ultimately prevents blurred images from being recorded via the image sensor BS.

The mobile terminals mentioned in the introduction generally have display devices, such as LC displays, for reproducing images and/or status information and input instructions.

An object of the present invention is, therefore, to improve the operation of mobile terminals with projected displays.

SUMMARY OF THE INVENTION

The mobile terminal according to the invention has a stabilized projected display. In cases where the terminal is operated via an integrated keyboard, it is thus possible to prevent movement of the projected display when the keys are pressed.

Additional features and advantages of the present invention are described in, and will be apparent from, the following Detailed Description of the Invention and the Figures.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows image stabilization at the recording end in a video camera according to the prior art.

FIG. 2 shows the terminal according to the present invention with a projected display.

FIG. 3 shows a further embodiment of the terminal, using a light beam as a pointing medium.

FIG. 4 shows a further embodiment of the terminal according to the present invention, using a camera.

DETAILED DESCRIPTION OF THE INVENTION

The terminal EG according to the present invention shown in FIG. 2 has a projected display PD, an image being projected from the terminal EG via an optical system (OT in FIG. 1), which is not shown in detail, on to a projection surface; for example, a white wall. The reproduction of the image also can be achieved using an appropriately angled base on a table.

The projected display PD is produced by a miniaturized projector or a miniaturized beamer using the optical system in the terminal EG. The design of this projector is of secondary importance to the present invention and is not shown in detail in the drawing.

According to the present invention, the terminal EG has one or more sensors, via which movements and/or juddering of the terminal EG are recorded. These movements are compensated for when the image is reproduced; for example, via a correction of the reproducing optical system (OT in FIG. 1). The movement of the terminal is shown in two planes via symbols; for example, the two bidirectional arrows P1 and P2. The process for stabilizing the image are implemented, for example, by analogy with FIG. 1 and are not shown in detail in FIG. 2.

The terminal EG according to the present invention is, for example, tiltable in two dimensions through a certain angle without the projected image (on the projection surface) or the projected display PD being displaced. This motion compensation is switchably implemented, for example, via a key on the terminal EG. When the motion compensation is switched off, the projected image is adjusted to the selected projection surface, table or wall. Activating the compensation clamps the image, as it were.

In the further embodiment of the present invention shown in FIG. 3, the terminal has a laser pointer. This laser pointer or another light source emits a light beam L which can be positioned through movement of the terminal EG at least within the projected display PD. In this way, for example, details within the projected display PD can be illuminated or highlighted.

FIG. 4 shows a further embodiment of the present invention in which the terminal EG has a camera KA. The camera KA serves to record the projected image and/or the image content of the projected display PD and also records the position of the light beam L.

This combination can be treated as an operator input for the device EG. A part of the projected display PD is, for example, recorded as a camera image by the camera KA. The camera image KB is, for example, located on the left in the bottom half of the projected display PD.

The combination of projected display PD, light beam L and recording via the camera KA enables operator input without a keyboard. The light beam L is, for example, moved to a symbol in the projected display PD and thereby activates the symbol. The projected display PD according to the present invention does not force the user to switch his/her gaze between a keyboard on the terminal EG and the image shown on or in the projected display PD.

Although the present invention has been described with reference to specific embodiments, those of skill in the art will recognize that changes may be made thereto without departing from the spirit and scope of the present invention as set forth in the hereafter appended claims.

*


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