Liquid crystal display device

• US 8,885,131 B2
• Filed: 01/27/2011
• Issued: 11/11/2014
• Est. Priority Date: 01/29/2010
• 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: Hirata, Mitsuaki, Kitayama, Masae, Hyohdoh, Kenichi, Itsumi, Ikumi, Yamashita, Yuki, Sugisaka, Akane, Shimoshikiryoh, Fumikazu
• Primary Examiner(s): Nguyen, Dung
• Assistant Examiner(s): DUONG, TAI V
• Application Number:
  US13/575,696
• Publication Number:
  US 20130002992A1
• Time in Patent Office: 1,384 Days
• Field of Search: 349/85, 349/106, 349/108, 349/109, 349/143, 349/144, 345/88, 345/89
• US Class Current: 349/144
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• 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 2300/0447 for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
• 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 2300/0876 Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 3/207 by domain size control G09G3/3637 takes precedence
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/2077 by a combination of two or more gradation control methods
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A liquid crystal display device (100) according to the present invention includes a color display pixel D including pixels PA through PD arrayed in a matrix. The pixels PA through PD respectively include sub pixels SA1 through SD1and sub pixels SA2 through SD2. At least at an intermediate gray scale level, the luminance of the sub pixels SA2 through SD2 is higher than the luminance of the sub pixels SA1through SD1. The plurality of sub pixels S included in the pixels PA through PD are arrayed in a matrix. The sub pixel SA2 is adjacent to the sub pixel SB2 in the row direction, is adjacent to the sub pixel SC2 in the column direction, and is adjacent to the sub pixel SD2 in an oblique direction.

Claims

1. A liquid crystal display device comprising a color display pixel which includes a plurality of pixels arrayed in a matrix of a plurality of rows by a plurality of columns, wherein:

the plurality of pixels include;

a first pixel;

a second pixel adjacent to the first pixel in a row direction;

a third pixel adjacent to the first pixel in a column direction; and

a fourth pixel adjacent to the second pixel in the column direction and adjacent to the third pixel in the row direction;

the plurality of pixels each include a plurality of sub pixels including a first sub pixel and a second sub pixel;

at least at an intermediate gray scale level, in each of the plurality of pixels, the second sub pixel exhibits a luminance higher than the luminance of the first sub pixel;

the plurality of sub pixels included in the plurality pixels are arrayed in a matrix of a plurality of rows by a plurality of columns;

the second sub pixel in the first pixel is adjacent to the second sub pixel in the second pixel in the row direction, is adjacent to the second sub pixel in the third pixel in the column direction, and is adjacent to the second sub pixel in the fourth pixel in an oblique direction;

the first sub pixel in the first pixel and the first sub pixel in the third pixel are adjacent to each other in the column direction; and

the first sub pixel in the second pixel and the first sub pixel in the fourth pixel are adjacent to each other in the column direction.

2. The liquid crystal display device of claim 1, wherein the plurality of pixels further include:

the fifth pixel adjacent to the third pixel in the column direction; and

a sixth pixel adjacent to the fourth pixel in the column direction.

3. The liquid crystal display device of claim 1, wherein the plurality of pixels display different colors from each other.

4. The liquid crystal display device of claim 3, wherein the plurality of pixels include a red pixel, a green pixel, a blue pixel and a yellow pixel as the first, second, third and fourth pixels.

5. The liquid crystal display device of claim 4, wherein the red pixel and the blue pixel each have an area size larger than the area size of each of the green pixel and the yellow pixel.

6. The liquid crystal display device of claim 1, wherein in each of the plurality of pixels, the first sub pixel has an area sixe larger than the area size of the second sub pixel.