Display device having pixels including a plurality of sub-pixels

• US 7,710,388 B2
• Filed: 12/27/2004
• Issued: 05/04/2010
• Est. Priority Date: 12/26/2003
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Shalwala; Bipin
• Assistant Examiner(s): Holton; Steven E
• Application Number:
  US11/020,092
• Publication Number:
  US 20050168423A1
• Time in Patent Office: 1,954 Days
• Field of Search: 345/694, 345/695, 345/696, 345/88, 345/83, 345/96, 345/103, 345/89, 345/90, 349/139
• US Class Current: 345/103
• 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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.

4. The display device of any one of claims 1, 2, and 3, 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.

5. The display device of any one of claims 1, 2, and 3, wherein:

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

6. The display device of claim 5, 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.

7. The display device of any one of claims 1, 2, and 3, wherein each of the sub-pixel groups includes sub-pixels of three colors, red, green and blue.

8. The display device of any one of claims 1, 2, and 3, wherein each of the sub-pixel groups includes sub-pixels of three colors, cyan, magenta and yellow.

9. The display device of any one of claims 1, 2, and 3, wherein each of the sub-pixel groups includes sub-pixels of four colors, red, green, blue and white.

10. The display device of any one of claims 1, 2, and 3, wherein each of the sub-pixel groups includes sub-pixels of five colors, red, green, blue, yellow and cyan.

11. The display device of claim 1, 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.

2. 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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.

12. The display device of claim 2, 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.

3. 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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.

13. The display device of claim 3, 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.

14. 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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%.

15. 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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%.

16. 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;

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

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

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

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 “

−

•

+•

−

•

−

•

+•

−

”

;

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

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%.