Display system and method of eliminating residual image in the same

• US 20040051705A1
• Filed: 05/29/2003
• Published: 03/18/2004
• Est. Priority Date: 09/17/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jin Seok
• Granted Patent: US 7,474,356 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 2320/0257 Reduction of after-image effects
• CPC Class Codes: G09G 2340/0464 Positioning
• CPC Class Codes: G09G 2340/125 wherein one of the images is motion video
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/28 using luminous gas-discharge panels, e.g. plasma panels
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: H04N 21/42204 User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor constructive details of casings for the remote control device H01H9/0235; user interfaces for controlling a tuning device of a television receiver through a remote control H03J9/00; remote control of peripheral devices connected to a television receiver through the remote control device of the television receiver H04B1/205
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/47 End-user applications

Abstract

A display system and a method of eliminating a residual image on a display causes an on screen display (OSD) block to be moved to different locations on the display to eliminate the residual image. In a method embodying the invention, a mixed video image that includes a video image from a video source and at least one OSD block is generated. Thereafter, the mixed video image is displayed on a display screen to thereby eliminate a residual image on the display screen and the at least one OSD block is scanned to different positions on an active image portion of the display screen. In a progressive scanning mode, the OSD block is progressively scanned across the active image portion. On the other hand, in a random scanning mode the at least one OSD block is randomly moved to different locations on the active image portion of the display screen for a predetermined period of time.

Claims

1. A method for eliminating a residual image in a display system, comprising:

generating a mixed video image that includes a video image from a video source and at least one on screen display (OSD) block; and

displaying the mixed video image on a display screen to thereby eliminate a residual image on the display screen.

2. The method of claim 1, further comprising moving the at least one OSD block to different locations on an active image portion of the display screen.

3. The method of claim 2, wherein the moving step comprises progressively scanning the at least one OSD block across the active image portion of the display screen.

4. The method of claim 3, wherein the moving step further comprises:

(a) moving the at least one OSD block horizontally to a plurality of different positions across the display screen; and

(b) moving the at least one OSD block vertically when no portion of the at least one OSD block remains within the active image portion of the display screen; and

(c) repeating steps (a) and (b) until the at least one OSD block has been scanned across the entire active image of the display screen.

5. The method of claim 2, wherein the at least one OSD block is randomly moved to different locations on the active image portion of the display screen.

6. The method of claim 5, wherein the at least one OSD block is randomly moved to different locations on the active image portions of the display screen until a predetermined period of time expires.

7. The method of claim 6, further comprising determining the predetermined period of time based on at least one of a pixel refresh time period, a size of the at least one OSD block, a number of the at least one OSD block appearing in the mixed video image, and a size of the active image.

8. The method of claim 2, wherein the at least one OSD block is displayed in a single position in the active image for a pixel refresh time period before the at least one OSD is moved to a new position.

9. The method of claim 1, wherein the generating step comprises generating a mixed video image that includes the video image from the video source and a plurality of OSD blocks.

10. The method of claim 9, wherein at any given moment, each of the plurality of OSD blocks appear at different locations on the active image.

11. The method of claim 1, wherein the at least one OSD block appears as a bright color.

12. The method of claim 11, wherein the at least one OSD block appears in white.

13. The method of claim 1, further comprising determining a size and shape of the at least one OSD block.

14. A display system, comprising:

means for generating a mixed video image that includes a video image from a video source and at least one on screen display (OSD) block; and

means for displaying the mixed video image on a display screen to thereby eliminate a residual image on the display screen.

15. A display system, comprising:

an on screen display (OSD) controller configured to generate an OSD video signal that includes at least one OSD block capable of eliminating a residual image;

a mixer for mixing a video signal and the OSD video signal to generate a mixed video image; and

a display coupled to the mixer and configured to display the mixed video image.

16. The system of claim 15, wherein the OSD controller is configured to cause the at least one OSD block to move to different locations on an active image portion of the display to thereby eliminate a residual image from different locations on the active image portion of the display.

17. The system of claim 16, wherein the OSD controller is configured to cause the at least one OSD block to be progressively scanned across the active image portion of the display screen.

18. The system of claim 17, wherein the OSD controller is configured to cause the at least one OSD block to move horizontally to a plurality of different positions across the display screen, and wherein the OSD controller causes the at least one OSD block to move vertically when no portion of the at least one OSD block remains within the active image portion of the display screen

19. The system of claim 16, wherein the OSD controller is configured to cause the at least one OSD block to move randomly to different locations on the active image portion of the display screen.

20. The system of claim 19, wherein the OSD controller is configured to cause the at least one OSD block to move randomly to different locations on the active image portion of the display screen until a predetermined period of time elapses.

21. The system of claim 20, wherein the OSD controller is configured to determine a length of the predetermined period of time based on at least one of a pixel refresh time period, a size of the at least one OSD block, a number of the at least one OSD block appearing in the mixed video image, and a size of the active image.

22. The system of claim 15, wherein the OSD controller is configured to cause the at least one OSD block to be displayed in a single position in the active image for a pixel refresh time period before the at least one OSD block is moved to a new position.

23. The system of claim 15, wherein the OSD controller is configured to generate an OSD video signal that includes a plurality of OSD blocks.

24. The system of claim 23, wherein the OSD controller is configured to cause the plurality of OSD blocks to appear at different locations on the active image.

25. The system of claim 15, wherein the OSD controller is configured to cause the at least one OSD block to appear as a bright color.

26. The system of claim 25, wherein the OSD controller is configured to cause the at least one OSD block to appear in white.

27. The system of claim 15, wherein the OSD controller is configured to allow a user to select at least one of a size of the at least one OSD block, a shape of the at least one OSD block, a time period that the at least one OSD block is displayed at a single location on the active image, and a time period for causing the at least one OSD block to be scanned through all locations on the active image.