Light source device for display device and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-11054704-B2
Application number	US-202017081283-A
Country	US
Kind code	B2
Filing date	Oct 27, 2020
Priority date	Oct 28, 2019
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A light source device for a display device includes a planar light source and a monochrome liquid crystal panel. The monochrome liquid crystal panel includes a plurality of pixel electrodes. Pixel electrodes adjacent to each other in the plurality of pixel electrodes partially overlap each other within one pixel. The monochrome liquid crystal panel includes an exclusive region including a part of one of the plurality of pixel electrodes but not including the other pixel electrodes and an overlap region including parts of pixel electrodes adjacent to each other.

First claim

What is claimed is:

1. A light source device for a display device, the light source device comprising:
a planar light source; and
a monochrome liquid crystal panel,
wherein the monochrome liquid crystal panel includes a plurality of pixel electrodes,
wherein pixel electrodes adjacent to each other in the plurality of pixel electrodes partially overlap each other within one pixel, and
wherein the monochrome liquid crystal panel includes an exclusive region including a part of one of the plurality of pixel electrodes but not including the other pixel electrodes and an overlap region including parts of pixel electrodes adjacent to each other.

2. The light source device according to claim 1 ,
wherein the monochrome liquid crystal panel includes a plurality of pixel electrode lines each composed of pixel electrodes disposed along a first axis,
wherein the plurality of pixel electrode lines are disposed along a second axis perpendicular to the first axis, and
wherein exclusive regions and overlap regions are disposed alternately in each of the plurality of pixel electrode lines.

3. The light source device according to claim 2 , further comprising:
a plurality of gate lines disposed to extend along the first axis and be distant from one another along the second axis.

4. The light source device according to claim 2 , further comprising:
a plurality of data lines disposed to extend along the first axis and be distant from one another along the second axis.

5. The light source device according to claim 1 ,
wherein the pixel electrodes adjacent to each other are a first pixel electrode and a second pixel electrode,
wherein each of the first pixel electrode and the second pixel electrode includes a shaft and rows of teeth on both sides of the shaft, and
wherein one of the rows of teeth of the first pixel electrode and one of the rows of teeth of the second pixel electrode partially overlap each other.

6. The light source device according to claim 5 , wherein teeth of the first pixel electrode and teeth of the second pixel electrode are disposed alternately in the overlap region.

7. The light source device according to claim 5 , wherein first groups composed of a plurality of consecutive teeth of the first pixel electrode and second groups composed of a plurality of consecutive teeth of the second pixel electrode are disposed alternately in the overlap region.

8. The light source device according to claim 1 , wherein each of the plurality of pixel electrodes partially overlaps two pixel electrodes adjacent to the pixel electrode on one side and partially overlaps two other pixel electrodes adjacent to the pixel electrode on the other side.

9. The light source device according to claim 8 ,
wherein, in the exclusive region, the pixel electrode generates an electric field to be applied to liquid crystal with a common electrode provided on a different layer of the same substrate on which the pixel electrode is provided, and
wherein, in the overlap region, the pixel electrode generates an electric field to be applied to liquid crystal with the adjacent pixel electrode.

10. A liquid crystal display device comprising:
a color liquid crystal panel;
a monochrome liquid crystal panel; and
a planar light source,
wherein the color liquid crystal panel, the monochrome liquid crystal panel, and the planar light source are stacked,
wherein the monochrome liquid crystal panel includes a plurality of pixel electrodes,
wherein pixel electrodes adjacent to each other in the plurality of pixel electrodes partially overlap each other within a pixel, and
wherein the monochrome liquid crystal panel includes an exclusive region including a part of one of the plurality of pixel electrodes but not including the other pixel electrodes and an overlap region including parts of pixel electrodes adjacent to each other.

Assignees

• Shanghai Tianma Micro Elect Co

Inventors

• Ikeno Hidenori

Classifications

• G02F2201/123

  pixel · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/1336 Primary

  Illuminating devices · CPC title

• G02F2201/124

  interdigital · CPC title