Liquid crystal display panel and method for forming the same, display device

Patent metadata

Field	Value
Publication number	US-10317724-B2
Application number	US-201715678857-A
Country	US
Kind code	B2
Filing date	Aug 16, 2017
Priority date	Sep 23, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A liquid crystal display panel and a method for forming the same and a display device are provided. The liquid crystal display panel includes two substrates opposite to each other and two polarizing plates at two sides of the two substrates away from each other. There exists a large cell gap region between the two substrates which has a cell gap larger than regions between the two substrates other than the large cell gap region, each polarizing plate includes a first polarizing layer, and at least one of the polarizing plates further includes a second polarizing layer. The second polarizing layer includes a pattern region corresponding to a position and a shape of the large cell gap region. There is an acute angle between a light absorption axis of the second polarizing layer at the pattern region and a light absorption axis of the first polarizing layer.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising two substrates opposite to each other and two polarizing plates at two sides of the two substrates away from each other, wherein there exists a large cell gap region between the two substrates which has a cell gap larger than regions between the two substrates other than the large cell gap region, each polarizing plate comprises a first polarizing layer, and at least one of the polarizing plates further comprises a second polarizing layer, wherein
each second polarizing layer comprises a pattern region corresponding to a position and a shape of the large cell gap region, and an orthogonal projection of the pattern region onto the two substrates covers the large cell gap region;
in each polarizing plate having the second polarizing layer, there is an acute angle between a light absorption axis of the second polarizing layer at the pattern region and a light absorption axis of the first polarizing layer.

2. The liquid crystal display panel according to claim 1 , wherein a transmittance of the two substrates and the two polarizing plates at a position corresponding to the large cell gap region is smaller than or equal to a transmittance of the two substrates and the two polarizing plates at a position corresponding to the regions between the two substrates other than the large cell gap region.

3. The liquid crystal display panel according to claim 2 , wherein the large cell gap region comprises at least two sub-regions having different cell gaps, the pattern region of at least one second polarizing layer comprises at least two sections adjacent to each other, and each sub-region corresponds to at least one section.

4. The liquid crystal display panel according to claim 3 , wherein the angles between the light absorption axes of the respective sections of the pattern region of the second polarizing layer and the light absorption axis of the first polarizing layer are difference from each other, to enable the intensities of the light beams transmitted from the respective sub-regions to be uniform.

5. The liquid crystal display panel according to claim 2 , wherein
in each polarizing plate having the second polarizing layer, the angle θ between the light absorption axis of the second polarizing layer at the pattern region and the light absorption axis of the first polarizing layer is equal to arcos(b/a), wherein b is an intensity of light beams passing through the polarizing plate at a light-transmitting side from the regions between the two substrates other than the large cell gap region, and a is an intensity of light beams passing through the polarizing plate at the light-transmitting side from the large cell gap region.

6. The liquid crystal display panel according to claim 1 , wherein each polarizing plate having the second polarizing layer further comprises a planarization layer at a layer identical to the second polarizing layer, and the planarization layer is arranged at a portion of the second polarizing layer other than the pattern region.

7. The liquid crystal display panel according to claim 6 , wherein the planarization layer is made of a photocuring adhesive.

8. The liquid crystal display panel according to claim 1 , wherein the large cell gap region between the two substrates is annular and at a periphery of the two substrates, and the pattern region of each second polarizing layer is annular.

9. The liquid crystal display panel according to claim 1 , wherein the two substrates opposite to each other are an array substrate and a color filter substrate respectively, the two polarizing plates are a first polarizing plate and a second polarizing plate respectively, the first polarizing plate is at a side of the array substrate away from the color filter substrate, and the second polarizing plate is at a side of the color filter substrate away from the array substrate.

10. The liquid crystal display panel according to claim 1 , wherein an orthogonal projection of the pattern region of the second polarizing layer onto the two substrates at least partially overlaps an orthogonal projection of the large cell gap region onto the two substrates.

11. The liquid crystal display panel according to claim 10 , wherein an area of the orthogonal projection of the pattern region of the second polarizing layer onto the two substrates is larger than an area of the orthogonal projection of the large cell gap region onto the two substrates.

12. A display device, comprising the liquid crystal display panel according to claim 1 .

13. A method for forming the liquid crystal display panel according to claim 1 , comprising:
determining, based on the position and the shape of the large cell gap region between the two substrates opposite to each other, a position and a shape of the pattern region of the second polarizing layer of at least one polarizing plate;
determining, based on the transmittance of the two substrates at the position corresponding to the large cell gap region, the angle between the light absorption axis of the second polarizing layer at the pattern region and the light absorption axis of the first polarizing layer;
forming the second polarizing layer having the pattern region at a side of the first polarizing layer of at least one polarizing plate; and
attaching the polarizing plate having the second polarizing layer onto at least one of the two substrates.

14. The method according to claim 13 , wherein the forming the second polarizing layer having the pattern region at a side of the first polarizing layer of at least one polarizing plate comprises:
forming a polarizing base layer at a side of the first polarizing layer of the polarizing plate; and
removing the polarizing base layer covering the regions between the two substrates other than the large cell gap region, to form the second polarizing layer having the pattern region.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Wang Mengjie
• Liu Xiaona
• Chen Yuqiong
• Yuan Shuai
• Li Ning
• Wang Yufei

Classifications

• G02F1/133609

  including means for improving the color mixing, e.g. white · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F1/133371

  Cells with varying thickness of the liquid crystal layer · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title