Image display device

Patent metadata

Field	Value
Publication number	US-9767742-B2
Application number	US-201615207583-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Jun 22, 2011
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

There is provided an image display device, in which a pixel includes sub-pixels of four or more colors that include a color in addition to the three primary colors, and which can display a high-quality image in which false colors or artifacts are suppressed. The image display device includes a pixel area in which a plurality of pixels P are arranged in a matrix shape, and each of the pixels P includes m (m is an integer which is equal to or greater than 4) sub-pixels SP. When it is assumed that the colors of the m sub-pixels SP included in one pixel are C 1 , C 2 , . . . , and Cm, the m sub-pixels SP which are sequentially arrayed from an arbitrary position include all of the colors of C 1 , C 2 , . . . , and Cm in both the vertical direction and the horizontal direction in the pixel area.

First claim

The invention claimed is:

1. An image display device comprising:
a pixel area in which a plurality of pixels are arranged in a matrix shape, each of the pixels including m (m is an integer which is equal to or greater than 4) sub-pixels; and
an image processor configured to receive an input image having a resolution higher than the number of pixels in the pixel area, and to assign grayscale data of the input image to corresponding sub-pixels, wherein
the image processor includes a plurality of high-pass filters, and
the image processor:
calculates weight coefficients for the respective plurality of high-pass filters, based on outputs of the plurality of high-pass filters;
integrates the weight coefficients with the outputs from the respective plurality of high-pass filters; and
synthesizes results of integration acquired by the integrator.

2. The image display device according to claim 1 , wherein
the image processor further includes a plurality of low-pass filters that are paired with the respective plurality of high-pass filters, and
when integrating the weight coefficients, the image processor integrates the weight coefficients with outputs from the respective plurality of high-pass filters and outputs from the respective plurality of low-pass filters.

3. The image display device according to claim 1 , wherein the m sub-pixels include sub-pixels of a same color.

4. The image display device according to claim 3 , wherein the sub-pixels of the same color are green sub-pixels.

5. The image display device according to claim 1 , wherein m is 4.

6. The image display device according to claim 5 , wherein the 4 sub-pixels includes a red sub-pixel, a blue sub-pixel, a green sub-pixel and a sub-pixel which color is any one of red, blue and green.

7. The image display device according to claim 5 , wherein the 4 sub-pixels includes a red sub-pixel, a blue sub-pixel and 2 green sub-pixels.

8. The image display device according to claim 1 , wherein m is 6.

9. The image display device according to claim 1 ,
wherein, when colors of m sub-pixels which are included in one pixel are represented as C 1 , C 2 , . . . , and Cm,
wherein the colors of C 1 , C 2 , . . . , and Cm include three primary colors of red, green, and blue.

10. The image display device according to claim 9 , wherein the colors of C 1 , C 2 , . . . , and Cm further include at least one color of cyan, magenta, yellow, and white.

11. The image display device according to claim 1 , wherein, when colors of m sub-pixels which are included in one pixel are represented as C 1 , C 2 , . . . , and Cm, the m sub-pixels which are sequentially arrayed from an arbitrary position include all of the colors of C 1 , C 2 , . . . , and Cm in both a vertical direction and a horizontal direction in the pixel area.

12. The image display device according to claim 1 , wherein, when colors of m sub-pixels which are included in one pixel are represented as C 1 , C 2 , . . . , and Cm, the sub-pixels of colors, which are included in a group having a relatively high brightness among the C 1 , C 2 , . . . , and Cm, are arranged at equal intervals in the pixel area.

13. The image display device according to claim 1 , wherein, when colors of m sub-pixels which are included in one pixel are represented as C 1 , C 2 , . . . , and Cm, the sub-pixels of colors, which are included in a group having relatively high brightness among the C 1 , C 2 , . . . , and Cm, are arranged such that three or more of the sub-pixels are not sequentially arranged in a diagonal direction in the pixel area.

14. The image display device according to claim 1 , further including:
a liquid crystal panel in which the pixel area is defined.

Assignees

• Sharp Kk

Inventors

• Nakagawa Shinji
• Miyata Hidekazu
• Furukawa Hiroyuki
• Yoshiyama Kazuyoshi
• Yoshida Yasuhiro
• Yanagi Toshihiro
• Nakano Taketoshi
• Yamato Asahi
• Inada Ken

Classifications

• G09G5/02

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G02F2201/52

  RGB geometrical arrangements · CPC title

• G09G2340/0457

  Improvement of perceived resolution by subpixel rendering · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title