Subpixel layouts and subpixel rendering methods for directional displays and systems

• US 8,933,959 B2
• Filed: 02/08/2008
• Issued: 01/13/2015
• Est. Priority Date: 02/13/2007
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Brown Elliott, Candice Hellen, Credelle, Thomas Lloyd, Schlegel, Matthew Osborne
• Primary Examiner(s): Wu, Xiao
• Assistant Examiner(s): BUTTRAM, ALAN T
• Application Number:
  US12/526,766
• Publication Number:
  US 20100118045A1
• Time in Patent Office: 2,531 Days
• Field of Search: 345/589, 345/604, 345/613, 348/E13.028, 348/E13.033, 348/E13.036
• US Class Current: 345/613
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• 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: H04N 13/302 for viewing without the aid of special glasses, i.e. using autostereoscopic displays
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/349 Multi-view displays for displaying three or more geometrical viewpoints without viewer tracking for viewing without the aid of special glasses using fly-eye lenses H04N13/307
• CPC Class Codes: H04N 13/356 having separate monoscopic and stereoscopic modes

Abstract

Display devices and systems are configured with display panels substantially comprising one of several embodiments of three primary color or multi-primary color subpixel repeating groups that are particularly suitable for directional display devices which produce at least two images simultaneously, such as autostereoscopic three-dimensional display devices or multi-view devices. Input image data indicating an image is rendered to a device configured with one of the illustrated subpixel repeating groups using a subpixel rendering operation.

Claims

1. A display device comprising:

a display panel substantially comprising a plurality of subpixel repeating groups, each subpixel repeating group having subpixels in at least first, second, third and fourth primary colors;

said subpixel repeating group comprising at least twelve subpixels disposed in two rows of at least six subpixels each, wherein four of the twelve subpixels have the first primary color, four of the twelve subpixels have the second primary color, two of the twelve subpixels have the third primary color, and two of the twelve subpixels have the fourth primary color, and wherein, in a row, the first primary color and second primary color alternate between a first, a second, a fourth and a fifth column; and

driver circuitry configured to send a signal to each subpixel on said display panel, the signal for each subpixel in a single subpixel repeating group based on a same input image data for a single pixel.

2. The display device as recited in claim 1 wherein said fourth primary color is one of a group of primary colors, said group comprising white, yellow, magenta, grey-blue, cyan and emerald.

3. The display device as recited in claim 1 further comprising an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, and configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window.

4. The display device as recited in claim 3 wherein said display device is an autostereoscopic display device such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

5. The display device as recited in claim 3 wherein said display device is a multi-view device such that an observer sees a first image from said first viewing window, and sees a second image from said second viewing window.

6. The display device as recited in claim 3 further comprising a light direction switching apparatus configured to control operation of said optical directing component in at least two modes;

said light direction switching apparatus causing said optical directing component to direct light emissions to said first and second viewing windows in said first mode, and said light direction switching apparatus causing said display panel to display a two-dimensional image in said second mode.

7. The display device as recited in claim 1 wherein said display device is an autostereoscopic display device further comprising an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window, and configured to direct light emissions from a third group of subpixels on said display panel to both said first and second viewing windows, such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

8. The display device as recited in claim 1 wherein said display panel is one of a group of panels, said group comprising a liquid crystal display panel, an emissive electroluminecent display panel, a plasma display panel, a field emitter display panel, an electrophoretic display panel, an iridescent display panel, an incandescent display panel, a light emitting diode display panel, and an organic light emitting diode display panel.

9. The display device as recited in claim 1 wherein said subpixel repeating group defines an output display format;

said display device further comprising;

an input image receiving component for receiving input image data in a first format for rendering on said display panel in said output display format; and

a subpixel rendering component configured to perform a subpixel rendering operation on said input image data to produce a luminance value for each subpixel on said display panel.

10. The display device as recited in claim 9 wherein said subpixel rendering operation produces said luminance value for each subpixel on said display panel by forming a resample area for each subpixel and computing said luminance value using input image data values from portions of said input image data that overlap with said resample area.

11. The display device as recited in claim 1 wherein said subpixel repeating group comprises twelve subpixels and said subpixels are arranged in the two rows as

12. A display device comprising:

a display panel substantially comprising a plurality of subpixel repeating groups, each subpixel repeating group having subpixels in at least first, second, third and fourth primary colors;

said subpixel repeating group comprising sixteen subpixels and said subpixels being arranged in two rows as

13. A display device comprising:

a display panel substantially comprising a plurality of subpixel repeating groups, each subpixel repeating group having subpixels in at least first, second, third and fourth primary colors;

said subpixel repeating group comprising twenty-four subpixels and said subpixels being arranged in two rows as

14. A directional display device comprising:

a display panel substantially comprising a subpixel repeating group having subpixels in at least first, second, third and fourth primary colors;

said subpixel repeating group comprising eight subpixels disposed in four rows and two columns;

each column of subpixels comprising one subpixel each of said first, second, third and fourth primary colors;

driver circuitry configured to send a signal to each subpixel on said display panel; and

an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, and configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window.

15. The directional display device as recited in claim 14 wherein said fourth primary color is one of a group of primary colors, said group comprising white, yellow, magenta, grey-blue, cyan and emerald.

16. The directional display device as recited in claim 14 wherein said directional display device is an autostereoscopic display device such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

17. The directional display device as recited in claim 14 wherein said directional display device is a multi-view device such that an observer sees a first image from said first viewing window, and sees a second image from said second viewing window.

18. The directional display device as recited in claim 14 further comprising a light direction switching apparatus configured to control operation of said optical directing component in at least two modes;

said light direction switching apparatus causing said optical directing component to direct light emissions to said first and second viewing windows in said first mode, and said light direction switching apparatus causing said display panel to display a two-dimensional image in said second mode.

19. The directional display device as recited in claim 14 wherein said subpixels are arranged in the four rows and two columns as

20. The directional display device as recited in claim 14 wherein said subpixel repeating group defines an output display format;

said directional display device further comprising;

an input image receiving component for receiving input image data in a first format for rendering on said display panel in said output display format; and

a subpixel rendering component configured to perform a subpixel rendering operation on said input image data to produce a luminance value for each subpixel on said display panel.

21. The directional display device as recited in claim 20 wherein said subpixel rendering operation produces said luminance value for each subpixel on said display panel by forming a resample area for each subpixel and computing said luminance value using input image data values from portions of said input image data that overlap with said resample area.

22. The directional display device as recited in claim 14 wherein said display panel is one of a group of panels, said group comprising a liquid crystal display panel, an emissive electroluminecent display panel, a plasma display panel, a field emitter display panel, an electrophoretic display panel, an iridescent display panel, an incandescent display panel, a light emitting diode display panel, and an organic light emitting diode display panel.

23. A directional display device comprising:

a display panel substantially comprising a subpixel repeating group having subpixels in first, second and third primary colors;

said subpixel repeating group comprising at least six subpixels disposed in two rows and at least three columns such that at least one column comprises two subpixels of said first primary color forming a vertical stripe on said display panel;

said subpixel repeating group further comprising one subpixel each of said second and third primary colors in each row such that a second primary color subpixel follows a third primary color subpixel in said first row and a third primary color subpixel follows a second primary color subpixel in said second row;

driver circuitry configured to send a signal to each subpixel on said display panel; and

an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, and configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window, wherein said first primary color is green.

24. The directional display device as recited in claim 23 wherein said subpixel repeating group comprises eight subpixels disposed in two rows and four columns such that two columns comprise subpixels of said first primary color forming two vertical stripes on said display panel.

25. The directional display device as recited in claim 24 wherein said first primary color is green;

and wherein said vertical stripes of green subpixels are non-adjacent.

26. The directional display device as recited in claim 25 wherein said green subpixels have half the aspect ratio in the horizontal dimension of said second and third primary color subpixels.

27. The directional display device as recited in claim 23 wherein said directional display device is an autostereoscopic display device such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

28. The directional display device as recited in claim 23 wherein said directional display device is a multi-view device such that an observer sees a first image from said first viewing window, and sees a second image from said second viewing window.

29. The directional display device as recited in claim 23 further comprising a light direction switching apparatus configured to control operation of said optical directing component in at least two modes;

said light direction switching apparatus causing said optical directing component to direct light emissions to said first and second viewing windows in said first mode, and said light direction switching apparatus causing said display panel to display a two-dimensional image in said second mode.

30. The directional display device as recited in claim 23 wherein said subpixel repeating group defines an output display format;

said directional display device further comprising;

an input image receiving component for receiving input image data in a first format for rendering on said display panel in said output display format; and

a subpixel rendering component configured to perform a subpixel rendering operation on said input image data to produce a luminance value for each subpixel on said display panel.

31. The display device as recited in claim 30 wherein said subpixel rendering operation produces said luminance value for each subpixel on said display panel by forming a resample area for each subpixel and computing said luminance value using input image data values from portions of said input image data that overlap with said resample area.

32. A directional display device comprising:

a display panel substantially comprising a subpixel repeating group having subpixels in at least first, second and third primary colors;

said subpixel repeating group comprising at least twelve subpixels disposed in two rows;

said subpixel repeating group further comprising one subpixel each of said second and third primary colors in each row such that a second primary color subpixel follows a third primary color subpixel in said first row and a third primary color subpixel follows a second primary color subpixel in said second row;

driver circuitry configured to send a signal to each subpixel on said display panel; and

an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window, and configured to direct light emissions from a third group of subpixels, the third group including second and third primary colors, on said display panel to both said first and second viewing windows, such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

33. The display device as recited in claim 32 wherein said subpixel repeating group includes subpixels in first, second, third and fourth primary colors;

wherein said subpixels in said subpixel repeating group are arranged in two rows as

34. The display device as recited in claim 32 wherein said subpixel repeating group includes subpixels in first, second, third, fourth and fifth primary colors;

and wherein each of said fourth and fifth primary colors is one of a group of primary colors, said group comprising white, yellow, magenta, grey-blue, cyan and emerald.

35. The display device as recited in claim 34 wherein said subpixel repeating group comprises twenty-four subpixels and said subpixels are arranged in the two rows as

36. The display device as recited in claim 32 wherein said subpixels in said subpixel repeating group are arranged in two rows as

37. The directional display device as recited in claim 32 further comprising a light direction switching apparatus configured to control operation of said optical directing component in at least two modes;

said light direction switching apparatus causing said optical directing component to direct light emissions to said first and second viewing windows in said first mode, and said light direction switching apparatus causing said display panel to display a two-dimensional image in said second mode.

38. The directional display device as recited in claim 32 wherein said subpixel repeating group defines an output display format;

said directional display device further comprising;

an input image receiving component for receiving input image data in a first format for rendering on said display panel in said output display format; and

a subpixel rendering component configured to perform a subpixel rendering operation on said input image data to produce a luminance value for each subpixel on said display panel.

39. The display device as recited in claim 38 wherein said subpixel rendering operation produces said luminance value for each subpixel on said display panel by forming a resample area for each subpixel and computing said luminance value using input image data values from portions of said input image data that overlap with said resample area.

40. The directional display device as recited in claim 32 wherein said display panel is one of a group of panels, said group comprising a liquid crystal display panel, an emissive electroluminecent display panel, a plasma display panel, a field emitter display panel, an electrophoretic display panel, an iridescent display panel, an incandescent display panel, a light emitting diode display panel, and an organic light emitting diode display panel.

41. The display device as recited in claim 33 wherein said fourth primary color is one of a group of primary colors, said group comprising white, yellow, magenta, grey-blue, cyan and emerald.

42. A display device comprising:

a display panel substantially comprising a plurality of subpixel repeating groups, each subpixel repeating group having subpixels in first, second and third primary colors;

said subpixel repeating group comprising twenty-four subpixels disposed in at least two rows and in at least two columns;

said subpixel repeating group further comprising eight subpixels of a first primary color disposed in one of a row and column direction on said display panel and subpixels of the second and third primary color alternating in at least one of a row and a column direction; and

driver circuitry configured to send a signal to each subpixel on said display panel, the signal for each subpixel in a single subpixel repeating group based on a same input image data for a single pixel.

43. The display device as recited in claim 42 further comprising an optical directing component configured to direct light emissions from a first group of subpixels on said display panel to a first viewing window, and configured to direct light emissions from a second group of subpixels on said display panel to a second viewing window.

44. The display device as recited in claim 43 wherein said display device is an autostereoscopic display device such that when an observer positions left and right eyes in said respective first and second viewing windows, the observer perceives a three-dimensional image.

45. The display device as recited in claim 43 wherein said display device is a multi-view device such that an observer sees a first image from said first viewing window, and sees a second image from said second viewing window.

46. The display device as recited in claim 43 further comprising a light direction switching apparatus configured to control operation of said optical directing component in at least two modes;

said light direction switching apparatus causing said optical directing component to direct light emissions to said first and second viewing windows in said first mode, and said light direction switching apparatus causing said display panel to display a two-dimensional image in said second mode.

47. The display device as recited in claim 42 wherein said display panel is one of a group of panels, said group comprising a liquid crystal display panel, an emissive electroluminecent display panel, a plasma display panel, a field emitter display panel, an electrophoretic display panel, an iridescent display panel, an incandescent display panel, a light emitting diode display panel, and an organic light emitting diode display panel.

48. The display device as recited in claim 42 wherein said subpixel repeating group defines an output display format;

said display device further comprising;

an input image receiving component for receiving input image data in a first format for rendering on said display panel in said output display format; and

a subpixel rendering component configured to perform a subpixel rendering operation on said input image data to produce a luminance value for each subpixel on said display panel.

49. The display device as recited in claim 48 wherein said subpixel rendering operation produces said luminance value for each subpixel on said display panel by forming a resample area for each subpixel and computing said luminance value using input image data values from portions of said input image data that overlap with said resample area.