Methods and systems for displaying video on an adjustable screen

• US 8,089,567 B2
• Filed: 10/14/2005
• Issued: 01/03/2012
• Est. Priority Date: 07/29/2005
• Status: Expired due to Fees

• Current Assignee: Optoma Technology Incorporated (Coretronic Corporation)
• Original Assignee: Optoma Technology Incorporated (Coretronic Corporation)
• Inventors: Chung, Yau Wing
• Primary Examiner(s): YENKE, BRIAN P
• Application Number:
  US11/249,256
• Publication Number:
  US 20070024763A1
• Time in Patent Office: 2,272 Days
• Field of Search: 348/745, 348/806, 348/580, 348/581, 348/575, 348/604, 348/558, 348/461, 348/465, 348/467, 348/460, 348/556, 353/69
• US Class Current: 348/745
• CPC Class Codes: G03B 21/142 Adjusting of projection optics
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 7/0122 the input and the output signals having different aspect ratios

Abstract

The dimensions of a viewing screen are altered to fit the aspect ratio of video being displayed on the viewing screen. A viewing screen includes screen covers which may be displaced horizontally along the viewing screen. If a different aspect ratio video is being displayed, the screen covers are moved horizontally to increase or decrease the viewing area of the viewing screen. The video is then optically resized and shifted to fit the height or width of the screen.

Claims

1. A method of displaying a video, comprising:

projecting the video onto a viewing screen having at least one screen cover located in front of the viewing screen;

determining, after the video is projected onto the viewing screen, if a height dimension and a width dimension of the video that was projected onto the viewing screen matches a height dimension and a width dimension of the viewing screen;

altering, after the determination that either the height dimension or the width dimension of the projected video does not match the height dimension and the width dimension of the view screen, one of the height dimension and the width dimension of the viewing screen while keeping the other of the height dimension and the width dimension constant by moving the at least one screen cover in front of the viewing screen with respect to the viewing screen when an aspect ratio of the video based on the height dimension and the width dimension of the video does not match the aspect ratio of the viewing screen, wherein the at least one screen cover is continuously displaced from a corresponding edge of the viewing screen when the at least one screen cover moves toward a center portion of the viewing screen and the at least one screen cover is continuously displaced from the corresponding edge of the viewing screen when the at least one screen cover moves away from the center portion of the viewing screen;

determining, after the altering, whether a width of the video matches the width dimension of the viewing screen;

zooming the width of the video in response to the width of the video not matching the width dimension of the viewing screen;

shifting the video to an alignment position through aligning a height of the video with the height dimension of the viewing screen, wherein the video is projected onto the alignment position in the viewing screen; and

storing the alignment position of the video in a non-volatile memory.

2. The method of claim 1, wherein shifting the video comprises moving a lens in a projector projecting the video.

3. The method of claim 1, wherein the at least one screen cover is horizontally displaced in front of the viewing screen.

4. The method of claim 1, wherein moving the at least one screen cover comprises electrically moving the at least one screen cover.

5. The method of claim 1, wherein moving the at least one screen cover comprises manually moving the at least one screen cover.

6. The method of claim 1, wherein storing the position of the video in a non-volatile memory device, comprises storing a position of a lens in a projector projecting the video in the non-volatile memory.

7. The method of claim 6, further comprising storing the at least one altered dimension of the viewing screen in a non-volatile memory.

8. The method of claim 1, wherein the at least one screen cover is vertically displaced in front of the viewing screen.

9. The method of claim 1, further comprising:

determining whether previous information associated with the video is stored in the non-volatile memory, wherein the previous information comprises at least one of a modified screen dimension, a zoom setting, or a shifted video position.

10. A system for displaying a video, comprising:

a video source device for generating a video signal;

a video projection device coupled to the video source device for projecting the video based on the video signal that was generated by the video source device, the video projection device comprising a lens capable of zooming and shifting the video projected by the video projection device and a non-volatile memory for storing a position of the lens; and

a video display screen for displaying the video projected by the video projection device, the video display screen comprising at least one screen cover positioned in front of a portion of a viewing area of the video display screen,

wherein the at least one screen cover enables one of a height dimension and a width dimension of the viewing area of the video display screen to be altered while keeping the other of the height dimension and the width dimension constant by moving the at least one screen cover in front of the video display screen with respect to the video display screen when an aspect ratio of the video based on a video dimension projected on the video display screen does not match the height dimension and the width dimension, and when the video does not match the at least one of the height dimension or the width dimension of the video display screen, wherein the at least one screen cover is continuously displaced from a corresponding edge of the video display screen when the at least one screen cover moves toward a center portion of the video display screen and the at least one screen cover is continuously displaced from the corresponding edge of the video display screen when the at least one screen cover moves away from the center portion of the video display screen, and

wherein the lens is configured to zoom a width of the video in response to the width of the video not matching the width dimension of the viewing area of the video display screen, and shift the video to an alignment position through aligning a height of the video with the height dimension of the video area of the video display screen,

wherein the video projection device comprises a non-volatile memory arranged to store the alignment position and wherein the video is projected onto the alignment position in the viewing screen.

11. The system of claim 10, wherein the video display screen comprises a non-volatile memory for storing a position of the at least one screen cover.

12. The system of claim 10, wherein the video source device and the video projection device, are contained in a single housing.

13. The system of claim 10, wherein the video source device is a digital video player and the video projection device is a DLP video projector.

14. The system of claim 13, wherein the video source device and the video projection device are contained in a single housing.

15. The system of claim 10, wherein the video display screen comprises a retracting device for moving the video display screen vertically.

16. The system of claim 15, wherein the retracting device comprises a memory for storing a vertical position of the video display screen.

17. The system of claim 10, wherein the video projection device is configured to determine whether previous information associated with the video is stored in the non-volatile memory, wherein the previous information comprises at least one of a modified screen dimension, a zoom setting, or a shifted video position.

18. A system for displaying a video, comprising:

means for projecting the video onto a viewing screen having at least one screen cover located in front of the viewing screen, the projecting means comprising;

means for determining, after the video is projected on the viewing screen, if a height dimension and a width dimension of the video that was projected onto the viewing screen matches a height dimension and a width dimension of the viewing screen;

means for altering, after the determination that either the height dimension or the width dimension of the projected video does not match the height dimension and the width dimension of the view screen, one of the height dimension and the width dimension of the viewing screen while keeping the other of the height dimension and the width dimension constant by moving the at least one screen cover in front of the viewing screen with respect to the viewing screen when an aspect ratio of the video based on the height dimension and the width dimension of the video does not match the aspect ratio of the viewing screen, wherein the at least one screen cover is continuously displaced from a corresponding edge of the viewing screen when the at least one screen cover moves toward a center portion of the viewing screen and the at least one screen cover is continuously displaced from the corresponding edge of the viewing screen when the at least one screen cover moves away from the center portion of the viewing screen;

means for determining whether a width of the video matches the width dimension of the viewing screen;

means for zooming the width of the video in response to the width of the video not matching the width dimension of the viewing screen;

means for shifting the video to an alignment position through aligning the height of the video with the height dimension of the viewing screen, wherein the video is projected onto the alignment position in the viewing screen; and

means for storing the alignment position of the video.

19. The system of claim 18, further comprising means for storing altered dimensions of the viewing screen.

20. The system of claim 18, wherein the projecting means further comprises means for reading a video source.

21. The system of claim 18, further comprising means for determining whether previous information associated with the video, is stored in memory, wherein the previous information comprises at least one of a modified screen dimension, a zoom setting, or a shifted video position.