Method of displaying an image on a color display

• US 7,518,584 B2
• Filed: 01/16/2004
• Issued: 04/14/2009
• Est. Priority Date: 01/28/2003
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Langendijk, Erno Hermanus Antonius, Heynderickx, Ingrid Emilienne Joanna Rita
• Primary Examiner(s): Liang; Regina
• Application Number:
  US10/543,282
• Publication Number:
  US 20060158454A1
• Time in Patent Office: 1,915 Days
• Field of Search: 345/589, 345/204, 345/694, 345/84, 345/600, 345/603, 345/604, 345/3.3, 345/22, 345/72, 345/83, 345/88, 345/89, 345/690, 345/591, 345/593, 345/597
• US Class Current: 345/88
• CPC Class Codes: G09G 1/06 using single beam tubes G09G1/26, G09G1/28 take precedence, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows G09G1/28 takes precedence; stereoscopic TV-systems, details thereof H04N13/00; oscilloscopes for three-dimensional representation G01R13/206; vectorscopes G01R13/208
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 5/026 Control of mixing and/or overlay of colours in general G09G5/022 and G09G5/024 take precedence

Abstract

A method of displaying an image on a color display comprises receiving image data to be displayed, forming a first sub image and a second sub image from said image data, said first sub image comprising a first set of colors and said second sub image comprising a second set of colors, wherein said first set of colors and said second set of colors are disjoint sets, and wherein said first set of colors and said second set of colors comprise a metamer formed by at least a first color in said first set of colors and at least a second color in said second set of colors, and displaying said image using said first sub image and said second sub image, or a representation thereof, on a color display.

Claims

1. A method of displaying a current image on a color display, the method comprising the acts of:

receiving current image data representing the current image to be displayed during a frame for a refresh frame period by activating pixels of the color display, the activated pixels remaining on during the refresh frame period and changing during a next refresh frame period to display a next image data which is different from the current image data;

forming from said current image data a first sub-image by activating a first set of sub-pixels during a first portion of the refresh frame period of said image and a second sub-image by activating a second set of sub-pixels during a second portion of the refresh frame period, said first set of sub-pixels comprising a first set of colors and said second set of sub-pixels comprising a second set of colors, wherein said first set of colors and said second set of colors are different sets of colors and include increased number of colors, and wherein said first set of colors and said second set of colors comprise a metamer formed by at least a first color in said first set of colors and at least a second color in said second set of colors so that substantially the current image data is displayed during both the first portion and the second portion of the refresh frame period; and

displaying said image using said first sub image and said second sub image, or a representation thereof, on the color display with increased resolution without reducing a size of the sub-pixels, and using the increased number of colors to provide the increased resolution without a corresponding loss in resolution and without an increase in a size of a pixel by displaying the current image twice during the refresh frame period using the first set of sub-pixels and the second set of sub-pixels.

2. The method according to claim 1, wherein the color sensation provided by the metamer is perceived as an essentially white color.

3. The method according to claim 1, wherein said first sub image and said second sub image are displayed simultaneously during a time period.

4. The method according to claim 3, additionally comprising:

forming a representation of said first sub image and said second sub image by averaging data associated with any colors which are included in both said first set of colors and said second set of colors.

5. The method according to claim 1, wherein said first sub image and said second sub image are displayed sequentially in time during a time period.

6. The method according to claim 3, wherein the time period is short enough to be perceived as a single frame.

7. The method according to claim 5, said time period being equal to or shorter than 20 milliseconds.

8. A method according to claim 5, said time period being equal to or shorter than 10 milliseconds.

9. The method according to claim 1, wherein the first set of colors comprises red, green and blue.

10. The method according to claim 1, wherein the second set of colors comprises blue and yellow.

11. The method of claim 1, wherein said first set of colors comprising said metamer and said second set of colors comprising said metamer include a common color, and wherein the displaying act displays the common color twice during the refresh frame period of said image.

12. The method of claim 11, wherein the common color is blue.

13. The method of claim 1, wherein the refresh frame period is 20 Oms and the first portion of the refresh frame period is a first half of the refresh frame period and is 10 ms, and the second portion of the refresh frame period is a second half of the refresh frame period and is 10 ms.

14. The method of claim 1, wherein the first portion of the refresh frame period is a first half of the refresh frame period, and the second portion of the refresh frame period is a second half of the refresh frame period.

15. A display controller for controlling a color display to display a current image, the display controller being configured to:

receive current image data representing the current image to be displayed as the current image during a frame for a refresh frame period by activating pixels of the color display;

form from said current image data a first sub-image by activating a first set of sub-pixels during a first portion of a refresh frame period of said image and a second sub-image by activating a second set of sub-pixels during a second portion of the refresh frame period, said first set of sub-pixels comprising a first set of colors and said second sub image comprising a second set of colors, wherein said first set of colors and said second set of colors are different sets of colors and include increased number of colors, and wherein said first set of colors and said second set of colors comprise a metamer formed by at least a first color in said first set of colors and at least a second color in said second set of colors so that substantially the current image data is displayed during both the first portion and the second portion of the refresh frame period; and

display said image using said first sub image and said second sub image, or a representation thereof, on the color display with increased resolution without reducing a size of the sub-pixels, and using the increased number of colors to provide the increased resolution without a corresponding loss in resolution and without an increase in a size of a pixel by displaying the current image twice during the refresh frame period using the first set of sub-pixels and the second set of sub-pixels.

16. The display controller of claim 15, wherein said first set of colors comprising said metamer and said second set of colors comprising said metamer include a common color, and wherein the display controller is further configured to display the common color twice during the refresh frame of said image.

17. The display controller of claim 16, wherein the common color is blue.

18. The display controller of claim 15, wherein the first portion of the refresh frame period is a first half of the refresh frame period, and the second portion of the refresh frame period is a second half of the refresh frame period.

19. A display comprising a display controller for controlling the display to a current image, the display controller being configured to:

receive current image data representing the current image to be displayed as the current image during a frame for a refresh frame period by activating pixels of a color display;

form from said current image data a first sub-image by activating a first set of sub-pixels during a first portion of a refresh frame period of said image and a second sub-image by activating a second set of sub-pixels during a second portion of the refresh frame period, said first set of sub-pixels comprising a first set of colors and said second set of sub-pixels comprising a second set of colors, wherein said first set of colors and said second set of colors are different sets of colors and include increased number of colors, and wherein said first set of colors and said second set of colors comprise a metamer formed by at least a first color in said first set of colors and at least a second color in said second set of colors so that substantially the current image data is displayed during both the first portion and the second portion of the refresh frame period; and

display said image using said first sub image and said second sub image, or a representation thereof, on the color display with increased resolution without reducing a size of the sub-pixels, and using the increased number of colors to provide the increased resolution without a corresponding loss in resolution and without an increase in a size of a pixel by displaying the current image twice during the refresh frame period using the first set of sub-pixels and the second set of sub-pixels.

20. The display according to claim 19, wherein said display is one of a liquid crystal (LCD) display, a cathode ray tube (CRT) display with non overlapping electron beams, a flat intelligent tube (FIT) display, a plasma display panel (PDP), a polylight emitting diode (PolyLED) display, an organic light emitting diode (OLED) display and a field emission display (FED).

21. The display of claim 19, wherein said first set of colors comprising said metamer and said second set of colors comprising said metamer include a common color, and wherein the display controller is further configured to display the common color twice during the refresh frame of said image.

22. The display of claim 21, wherein the common color is blue.

23. The display of claim 19, wherein the first portion of the refresh frame period is a first half of the refresh frame period, and the second portion of the refresh frame period is a second half of the refresh frame period.