Display device

• US 20050168423A1
• Filed: 12/27/2004
• Published: 08/04/2005
• Est. Priority Date: 12/26/2003
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Takeuchi, Masanori, Hirata, Mitsuaki
• Granted Patent: US 7,710,388 B2
• Time in Patent Office: Days
• US Class Current: 345/88
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display device includes a plurality of pixels arranged in a matrix. At least one of the pixels includes two sub-pixel groups. Each of the sub-pixel groups includes sub-pixels of three or more colors. Sub-pixels of the same color in each pixel are driven by the same signal.

Claims

1. A display device, comprising a plurality of pixels arranged in a matrix:

wherein

at least one of the pixels includes a plurality of sub-pixel groups;

each of the sub-pixel groups includes sub-pixels of three or more colors; and

sub-pixels of the same color in each pixel are driven by the same signal.

2. The display device of claim 1, further comprising a driving circuit for outputting a signal which is used for driving the sub-pixels,

wherein the signal output from the driving signal is branched into a plurality of signals for driving the sub-pixels of the same color.

3. The display device of claim 1, wherein:

at least one of the pixels includes two sub-pixel groups which are adjacent to each other in the row direction; and

each of the two sub-pixel groups includes three or more sub-pixels periodically aligned in one direction.

4. The display device of claim 1, wherein each of the sub-pixel groups includes sub-pixels of three colors, red, green and blue.

5. The display device of claim 1, wherein each of the sub-pixel groups includes sub-pixels of three colors, cyan, magenta and yellow.

6. The display device of claim 1, wherein each of the sub-pixel groups includes sub-pixels of four colors, red, green, blue and white.

7. The display device of claim 1, wherein each of the sub-pixel groups includes sub-pixels of five colors, red, green, blue, yellow and cyan.

8. The display device of claim 3, wherein:

each of the two sub-pixel groups includes sub-pixels of three colors periodically aligned in one direction;

the polarity pattern of the sub-pixels included in one of two pixels which are adjacent to each other in the row direction is “

+•

−

•

+•

+•

−

•

+”

;

the polarity pattern of the sub-pixels included in the other pixel is “

−

•

+•

−

•

−

•

+•

−

”

; and

the polarity of the sub-pixels is inverted at a predetermined frequency.

9. The display device of claim 3, wherein:

each of the two sub-pixel groups includes sub-pixels of three colors, red, green and blue, periodically aligned in one direction;

the polarity pattern of the sub-pixels included in one of two pixels which are adjacent to each other in the row direction is “

+•

−

•

+•

+•

−

•

+”

;

the polarity pattern of the sub-pixels included in the other pixel is “

−

•

+•

−

•

−

•

+•

−

”

; and

the polarity of the sub-pixels is inverted at a predetermined frequency.

10. The display device of claim 3, wherein:

each of the two sub-pixel groups includes sub-pixels of three colors, cyan, magenta and yellow, periodically aligned in one direction;

the polarity pattern of the sub-pixels included in one of two pixels which are adjacent to each other in the row direction is “

+•

−

•

+•

+•

−

•

+”

;

the polarity pattern of the sub-pixels included in the other pixel is “

−

•

+•

−

•

−

•

+•

−

”

; and

the polarity of the sub-pixels is inverted at a predetermined frequency.

11. The display device of claim 3, wherein:

each of the two sub-pixel groups includes sub-pixels of five colors periodically aligned in one direction;

the polarity pattern of the sub-pixels included in one of two pixels which are adjacent to each other in the row direction is “

+•

−

•

+•

−

•

+•

+•

−

•

+•

−

•

+”

;

the polarity pattern of the sub-pixels included in the other pixel is “

−

•

+•

−

•

+•

−

•

−

•

+•

−

•

+•

−

”

; and

the polarity of the sub-pixels is inverted at a predetermined frequency.

12. The display device of claim 3, wherein:

each of the two sub-pixel groups includes sub-pixels of five colors, red, green, blue, yellow and cyan, periodically aligned in one direction;

the polarity pattern of the sub-pixels included in one of two pixels which are adjacent to each other in the row direction is “

+•

−

•

+•

+•

+•

−

•

+•

−

•

+”

;

the polarity pattern of the sub-pixels included in the other pixel is “

−

•

+•

−

•

+•

−

•

−

•

+•

−

•

+•

−

”

; and

the polarity of the sub-pixels is inverted at a predetermined frequency.

13. The display device of claim 8, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

among the sub-pixels which constitute the sub-pixel groups, a sub-pixel which is interposed between signal lines of the same polarity has the lowest luminosity factor.

14. The display device of claim 9, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

a sub-pixel which is interposed between signal lines of the same polarity is a blue sub-pixel.

15. The display device of claim 10, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

a sub-pixel which is interposed between signal lines of the same polarity is a magenta sub-pixel.

16. The display device of claim 8, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

a sub-pixel which is interposed between signal lines of the same polarity has an aperture ratio different from that of a sub-pixel of the same color which is interposed between signal lines of different polarities.

17. The display device of claim 9, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

a blue sub-pixel which is interposed between signal lines of the same polarity has an aperture ratio different from that of a blue sub-pixel which is interposed between signal lines of different polarities.

18. The display device of claim 10, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

a magenta sub-pixel which is interposed between signal lines of the same polarity has an aperture ratio different from that of a magenta sub-pixel which is interposed between signal lines of different polarities.

19. The display device of claim 8, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

the aperture ratio of a sub-pixel which is interposed between signal lines of the same polarity and has a color of the lowest luminosity factor among the sub-pixels which constitute the sub-pixel groups is lower than that of a sub-pixel of the same color which is interposed between signal lines of different polarities by about 10% to about 30%.

20. The display device of claim 9, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

the aperture ratio of a blue sub-pixel which is interposed between signal lines of the same polarity is lower than that of a blue sub-pixel which is interposed between signal lines of different polarities by about 10% to about 30%.

21. The display device of claim 10, further comprising a plurality of signal lines extending in the column direction and electrically connected to the sub-pixels, wherein:

each of the sub-pixels is interposed between two of the signal lines which are adjacent to each other in the row direction; and

the aperture ratio of a magenta sub-pixel which is interposed between signal lines of the same polarity is lower than that of a magenta sub-pixel which is interposed between signal lines of different polarities by about 10% to about 30%.

22. The display device of claim 3, wherein one of the sub-pixels constituting the sub-pixel group which has the lowest luminosity is sandwiched along the row direction by a sub-pixel of a color having the highest luminosity factor and a sub-pixel of a color having the second highest luminosity factor.

23. The display device of claim 1, wherein:

the pixel includes two sub-pixel groups which are adjacent to each other in the row direction, each of the sub-pixel groups including sub-pixels of three colors, red, green and blue, periodically aligned in one direction; and

a blue sub-pixel included in the sub-pixel group is sandwiched along the row direction by a green sub-pixel and a red sub-pixel.

24. The display device of claim 1, wherein:

the pixel includes two sub-pixel groups which are adjacent to each other in the row direction, each of the sub-pixel groups including sub-pixels of three colors, cyan, magenta and yellow, periodically aligned in one direction; and

a magenta sub-pixel included in the sub-pixel group is sandwiched along the row direction by a yellow sub-pixel and a cyan sub-pixel.

25. The display device of claim 1, wherein:

the pixel includes two sub-pixel groups which are adjacent to each other in the row direction, each of the sub-pixel groups including sub-pixels of five colors, red, green, blue, yellow and cyan, periodically aligned in one direction; and

a blue sub-pixel included in the sub-pixel group is sandwiched along the row direction by a green sub-pixel and a yellow sub-pixel.