Display panel and apparatus capable of resolution conversion

• US 6,014,121 A
• Filed: 12/24/1996
• Issued: 01/11/2000
• Est. Priority Date: 12/28/1995
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Aratani, Shuntaro, Inoue, Hiroshi, Ohshima, Masamichi
• Primary Examiner(s): NGUYEN, CHANH DUY
• Application Number:
  US08/773,646
• Time in Patent Office: 1,113 Days
• Field of Search: 345/87, 345/88, 345/89, 345/98, 345/99, 345/100, 345/94, 345/96, 345/208, 345/210, 345/147, 345/148, 345/149, 345/103, 345/67
• US Class Current: 345/89
• CPC Class Codes: G06T 3/4015 Image demosaicing, e.g. colour filter arrays [CFA] or Bayer patterns
• 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 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2340/0442 Handling or displaying different aspect ratios, or changing the aspect ratio
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A display panel has a display picture area composed of a plurality of dots. The dots can be divided into a number m of first pixels having an effective area S1 and can also be divided into a number n of second pixels having an effective area S2, satisfying S1<S2, m>n and m/n≠2a, wherein a is a natural number. As a result, the display panel can display a picture at different resolution levels without causing image quality deterioration.

Claims

1. A display panel comprising:

a plurality of pixels arranged vertically and horizontally, each pixel comprising 16 dots arranged in first to fourth rows and first to fourth columns, respectively, with the first and fourth rows of dots having a larger width than the second and third rows of dots, respectively, and the first and fourth columns of dots having a larger width than the second and third columns of dots, respectively, such that the pixels can be equally divided into at least two types of pixels including first and second pixels having mutually different areas and formed by different combinations of the 16 dots.

2. A display panel according to claim 1, wherein the pixels can be equally divided into a number m of first pixels having an effective area S1 and can also be equally divided into a number n of second pixels having an effective area S2, satisfying S1<

S2 and m/n≠

2a, wherein a is a natural number.

3. A display panel according to claim 1, wherein the pixels can be equally divided into a number p of first pixels having an effective area S1, can also be equally divided into a number q of second pixels having an effective area S2, and can further be divided into a number r of third pixels having an effective area S3, satisfying S1<

S2<

S3 and p/q≠

2a, and p/r=2a, wherein a is a natural number.

4. A display panel according to claim 1, wherein

the plurality of pixels can entirely be divided into a number m of first pixels having mutually equal areas, and

the plurality of pixels, except for a partial region thereof, can also be divided into a number n of second pixels having mutually equal areas, satisfying m>

n and m/n≠

a, wherein a is a natural number.

5. A display panel according to claim 1, having a pixel region comprising a plurality of pixels, wherein

the pixel region can be equally divided into first pixels having an effective area S1 and can also be divided into second pixels having an effective area S2, satisfying:

##EQU5## wherein b is a natural number.

6. A display panel according to claim 1, having a display picture area comprising a plurality of pixels, wherein

the entire display picture area can be equally divided into first pixels having an effective area S1 and can also be divided into second pixels having an effective area S2, satisfying:

##EQU6## wherein b is a natural number.

7. A display panel according to claim 1, having a display picture area comprising a plurality of pixels, wherein

the entire display picture area can be equally divided into first pixels having an effective area S1 and, except for a partial region thereof, can also be divided into second pixels having an effective area S2, satisfying:

##EQU7## wherein b is a natural number.

8. A display panel according to any one of claims 2, 3 or 4-7, wherein said second pixel has a dot pattern including said first pixel.

9. A display panel according to any one of claims 2-3 or 4-7, wherein said first pixel has a dot pattern composed of portions of a plurality of adjacent second pixels or of only a portion of a single second pixel.

10. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the first and second pixels comprises a plurality of pixels of mutually different colors.

11. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the first and second pixels comprises a plurality of color pixels of mutually different colors, and each color pixel comprises a plurality of color dots having mutually different areas.

12. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the first and second pixels comprises a yellow pixel, a cyan pixel and a magenta pixel.

13. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the first and second pixels comprises a red pixel, a green pixel and a blue pixel.

14. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the first and second pixels comprises a red pixel, a green pixel and a blue pixel, and the red pixel, the green pixel and the blue pixel comprise at least two types having mutually different areas of red dots, green dots and blue dots, respectively.

15. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the dots has an area defined by a light-intercepting member.

16. A display panel according to any one of claims 2, 3 or 4-7, wherein each of the dots has an area defined by a light-intercepting member and a color filter.

17. A display panel according to any one of claims 2, 3 or 4-7, wherein each dot is formed at an intersection of a scanning line and a data line and caused to have a display state depending on a combination of a voltage applied to the scanning line and a voltage applied to the data line.

18. A display panel according to any one of claims 2, 3 or 4-7, wherein each dot selectively assumes an optical state of either bright or dark.

19. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a liquid crystal display panel using a liquid crystal.

20. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a liquid crystal display panel using a nematic liquid crystal exhibiting two metastable states.

21. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a liquid crystal display panel using a chiral smectic liquid crystal.

22. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a liquid crystal display panel, wherein each dot is provided with a switching device.

23. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a liquid crystal display panel using a super-twisted nematic liquid crystal.

24. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a spontaneous light-emissive display panel.

25. A display panel according to any one of claims 2, 3 or 4-7, wherein said display panel is a reflection-type display panel, wherein a mirror direction is controlled.

26. A display panel according to claim 25, wherein each dot has an area defined by a mirror size.

27. A display panel according to any one of claims 2, 3 or 4-7, wherein each dot has an area defined by a pattern of fluorescent material.

28. A display panel according to any one of claims 2, 3 or 4-7, wherein the first pixel allows a gradational display at a number of levels different from that allowed by the use of the second pixel.

29. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes three dots having mutually different effective areas corresponding to at least three scanning lines.

30. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes 6 dots having mutually different effective areas formed at matrix intersections of at least three scanning lines and at least two data lines.

31. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes three dots having mutually different effective areas corresponding to at least three scanning lines, and larger two dots among the three dots have a total effective area which is almost 4 times that of the remaining smallest dot.

32. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes two groups of dots corresponding to at least two data lines, and one group of dots have a total effective area which is almost 2 times that of the other group of dots.

33. A display panel according to any one of claims 2, 3 or 4-7, wherein mutually adjacent two dots belonging to one and the other, respectively, of mutually adjacent two second pixels have substantially equal effective areas.

34. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes three dots having mutually different effective areas corresponding to at least three scanning lines, and mutually adjacent two dots belonging to one and the other, respectively, of mutually adjacent two second pixels have substantially equal effective areas.

35. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes 6 dots having mutually different effective areas formed at matrix intersections of at least three scanning lines and at least two data lines, and mutually adjacent two dots belonging to one and the other, respectively, of mutually adjacent two second pixels have substantially equal effective areas.

36. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes three dots having mutually different effective areas corresponding to at least three scanning lines, larger two dots among the three dots have a total effective area which is almost 4 times that of the remaining smallest dot, and mutually adjacent two dots belonging to one and the other, respectively, of mutually adjacent two second pixels have substantially equal effective areas.

37. A display panel according to any one of claims 2, 3 or 4-7, wherein each second pixel includes two groups of dots corresponding to at least two data lines, one group of dots have a total effective area which is almost 2 times that of the other group of dots, and mutually adjacent two dots belonging to one and the other, respectively, of mutually adjacent two second pixels have substantially equal effective areas.

38. A display panel according to any one of claims 2, 3 or 4-7, wherein the first pixels include mutually adjacent first pixels, one of which is divided into two dots or two groups of dots having mutually different effective areas, and the other of which is divided into two dots or two groups of dots having mutually equal effective areas.

39. A display panel according to claim 38, wherein said one first pixel and said the other first pixel are present on different scanning lines.

40. A display panel according to claim 38, wherein a larger dot or group of dots in said one first pixel and one dot or group of dots in said the other first pixel provide a total effective area which is almost 4 times that of a smaller dot or group of dots in said one first pixel.

41. A display apparatus comprising a display panel according to any one of claims 2, 3 or 4-7, and signal processing means for allotting display data to prescribed dots of the display panel depending on a desired resolution.

42. A display panel according to claim 1, wherein the first to fourth rows of dots are arranged in width ratios of 2:

1;

1;

2, and the first to fourth columns of dots are arranged in width ratios of 2;

1;

1;

2.

43. A display panel according to claim 1, wherein the dots in each row are arranged along a scanning line, and the dots in each column are arranged along a data line.