Liquid crystal display panel, liquid crystal display panel body component, and method of producing liquid crystal display panels

Patent metadata

Field	Value
Publication number	US-10895785-B2
Application number	US-201916669928-A
Country	US
Kind code	B2
Filing date	Oct 31, 2019
Priority date	Jun 29, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, and a main sealing portion. The second substrate opposes the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The main sealing portion is disposed in a circular shape to surround the liquid crystal layer and assembles the first substrate and the second substrate together to seal the liquid crystal layer between the substrates. A distance between opposing surfaces of the first substrate and the second substrate in a main attachment region of the substrates where the main sealing portion is disposed is smaller at an innermost peripheral portion than at the other portions.

First claim

The invention claimed is:

1. A liquid crystal display panel body component including rows of liquid crystal display panels each including a first substrate including a first transparent substrate, a second substrate including a second transparent substrate and opposing the first substrate, and a main sealing portion assembling the first substrate and the second substrate together and sealing a liquid crystal layer between the first and second substrates, the liquid crystal display panel body component comprising:
a first mother substrate including rows of first substrates and including a first mother transparent substrate including rows of first transparent substrates, a thickness of the first transparent substrate being constant;
a second mother substrate including rows of second substrates and including a second mother transparent substrate including rows of second transparent substrates, a thickness of the second transparent substrate being constant;
a plurality of main sealing portions each disposed in a circular shape and located between the first mother substrates and the second mother substrates; and
a dummy sealing portion that is located between the plurality of main sealing portions adjacent to each other and assembles the first mother substrate and the second mother substrate together, wherein
a distance between plate surfaces of the first mother transparent substrate and the second mother transparent substrate in a dummy attachment region of the mother substrates where the dummy sealing portions are disposed is larger than that in a main attachment region where the main sealing portions are disposed,
the main sealing portion includes a main spacer defining a thickness of the main sealing portion,
the dummy sealing portion includes a dummy spacer defining a thickness of the dummy sealing portion,
a dimension of the dummy spacer in a thickness direction is greater than that of the main spacer, and the thickness direction is a direction normal to the plate surface of the first mother transparent substrate, and
a distance between the main attachment region and the dummy attachment region is 2.7 mm or more and less than 6.5 mm.

2. The liquid crystal display panel body component according to claim 1 , wherein the distance between the plate surfaces of the first mother transparent substrate and the second mother transparent substrate in the dummy attachment region is larger than 1.00 times and not more than 1.20 times of distance thereof in the main attachment region.

3. The liquid crystal display panel body component according to claim 1 , wherein a light-blocking layer that blocks light is disposed on a surface of the second substrate side of each of the first transparent substrates at least over a frame-shaped light-blocking region adjacent to an inner periphery of the main attachment region, and
a distance between plate surfaces of the first transparent substrates and the second transparent substrates in the frame-shaped light-blocking region is smaller than that in the main attachment region.

4. The liquid crystal display panel body component according to claim 3 , further comprising a protruded spacer in the frame-shaped light-blocking region, the protruded spacer protruding from one of opposing surfaces of the first substrate and the second substrate to the other of the opposing surfaces of the first and second substrates to define a distance between the opposing surfaces of the substrates, wherein the protruded spacer occupies less than 2% of an area of the frame-shaped light-blocking region in an area of a bottom thereof on one of the first and second substrates or in an area of a head thereof in contact with the other of the first and second substrates, whichever is larger.

5. The liquid crystal display panel body component according to claim 1 , wherein the dummy sealing portion is directly fixed to the first mother transparent substrate and the second mother transparent substrate.

6. The liquid crystal display panel body component according to claim 5 , wherein the dummy sealing portion includes a dummy spacer defining a thickness of the dummy sealing portion, and
the thickness of the dummy sealing portion is larger than the distance between the plate surfaces of the first mother transparent substrate and the second mother transparent substrate in the main attachment region.

7. The liquid crystal display panel body component according to claim 1 , wherein:
a light-blocking layer that blocks light is disposed on a surface of the second substrate side of each of the first transparent substrates at least over a frame-shaped light-blocking region adjacent to an inner periphery of the main attachment region, a display area is located on an inner side of the frame-shaped light-blocking region, and
a distance between opposing surfaces of the first substrate and the second substrate in the frame-shaped light-blocking region is greater than that in the display area.

Assignees

• Sharp Kk

Inventors

• Higashiyama Miyuki
• Nishiuchi Makoto
• TANIIKE Kohshiroh

Classifications

• G02F1/1351

  Light-absorbing or blocking layers · CPC title

• G02F1/1339 Primary

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F1/135

  Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied {(G02F1/133348 takes precedence)} · CPC title

• G02F1/133351

  Manufacturing of individual cells out of a plurality of cells, e.g. by dicing · CPC title

• G02F1/13392 Primary

  spacers dispersed on the cell substrate, e.g. spherical particles, microfibres · CPC title