Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-12222598-B2
Application number	US-202418750437-A
Country	US
Kind code	B2
Filing date	Jun 21, 2024
Priority date	Jun 30, 2023
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

A liquid crystal display device includes a first liquid crystal display panel in which a first main pixel including subpixels is arranged in a matrix, and that displays a color image, and a second liquid crystal display panel that includes a second main pixel corresponding to a plurality of the first main pixel, and that displays a monochrome image. The second main pixel is divided into a plurality of regions, and has pixel electrodes disposed in the plurality of regions and a plurality of light shields. At least a portion of the plurality of light shields is formed from a switching element that connects to each of the pixel electrodes, and the plurality of light shields is arranged in a staggered manner. The light shields positioned within one set of the regions formed from adjacent regions forms one set of the light shields.

First claim

The invention claimed is:

1. A liquid crystal display device comprising:
a first liquid crystal display panel in which a first main pixel including a plurality of subpixels of different colors is arranged in a matrix in a predetermined first direction and a predetermined second direction perpendicular to the predetermined first direction, the first liquid crystal display panel displaying a color image; and
a second liquid crystal display panel that is positioned on a side, opposite a surface of an observer side, of the first liquid crystal display panel and overlaid on the first liquid crystal display panel, includes a second main pixel corresponding to a plurality of the first main pixel, the second liquid crystal display panel displaying a monochrome image, wherein
the second main pixel is divided into a plurality of regions, and has pixel electrodes disposed in the plurality of regions and a plurality of light shields,
at least a portion of the plurality of light shields is formed from a switching element that connects to each of the pixel electrodes,
the plurality of light shields is arranged in a staggered manner,
the light shields positioned within one set of the regions, formed from the regions adjacent to each other, forms one set of the light shields, and
the one set of light shields equally blocks, for each color, light incident on the subpixels.

2. The liquid crystal display device according to claim 1 , wherein
the one set of light shields equally blocks, for each color, light incident on the subpixels that are arranged continuously, and
the plurality of light shields are arranged in a staggered manner in units of the one set of the light shields.

3. The liquid crystal display device according to claim 2 , wherein the plurality of light shields positioned within the second main pixel equally blocks, for each color, light incident on the subpixels.

4. The liquid crystal display device according to claim 2 , wherein
the regions form a first set from the regions arranged in two rows and two columns in the predetermined first direction and the predetermined second direction, and form a second set from two of the regions arranged in the predetermined second direction,
a first row in which the first set is arranged in the predetermined second direction, and a second row in which the second set is arranged in the predetermined second direction shifted, with respect to the first row, an amount corresponding to one of the regions, are arranged in an alternating manner in the predetermined first direction,
in the first set of the regions, the one set of light shields is formed by arranging, in the predetermined first direction, four of the light shields formed from the switching element, and
in the second set of the regions, the one set of light shields is formed by arranging, in the predetermined first direction, two of the light shields formed from the switching element and two of the light shields formed from a dummy light shielding layer.

5. The liquid crystal display device according to claim 2 , wherein at least a portion of the plurality of light shields straddle a plurality of the subpixels of mutually different colors, and blocks light incident on the plurality of subpixels.

6. The liquid crystal display device according to claim 2 , wherein
the second liquid crystal display panel includes a light blocking pattern that is repeatedly arranged and that has light blocking properties,
the light blocking pattern extends in the predetermined first direction or the predetermined second direction, and includes a first light blocking wire including a first incline portion inclined with respect to an extending direction and a second incline portion inclined in an opposite direction to the first incline portion with respect to the extending direction, and a second light blocking wire that is adjacent to the first light blocking wire and that has line symmetry in the extending direction with the first light blocking wire, and
the first light blocking wire and the second light blocking wire are formed from one selected from scanning wires and signal wires of the second liquid crystal display panel.

Assignees

• Shanghai Tianma Micro Elect Co

Inventors

• Honda Tomomi
• Sugimoto Mitsuhiro
• Ikeno Hidenori
• Konno Takayuki
• Onda Shinya
• Inada Satoshi

Classifications

• G02F1/133514

  Colour filters · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1368

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

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title