Liquid crystal display panel, sealing performance testing method thereof and display device

Patent metadata

Field	Value
Publication number	US-10126604-B2
Application number	US-201615329122-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Jan 18, 2016
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A liquid crystal display panel, a sealing performance testing method thereof and a display device are provided. In the liquid crystal display panel, a side of the array substrate facing the opposed substrate is provided with a plurality of independent first conductive portions, a side of the opposed substrate facing the array substrate is provided with a plurality of independent second conductive portions, sealant is an anisotropic conductive adhesive, all of the first conductive portions and all of the second conductive portions are electrically connected through the sealant to form an unclosed conductor surrounding a display region; by testing a resistance value between any two first conductive portions on the array substrate, it can be determined that there is a micro gap or breaking sealant problem upon the resistance value being abnormal.

First claim

The invention claimed is:

1. A liquid crystal display panel, comprising:
an array substrate;
an opposed substrate, disposed opposite to the array substrate;
a closed sealant disposed between the array substrate and the opposed substrate and surrounding a display region;
a plurality of independent first conductive portions, disposed at a side of the array substrate facing the opposed substrate; and
a plurality of independent second conductive portions, disposed at a side of the opposed substrate facing the array substrate,
wherein the sealant is an anisotropic conductive adhesive, all of the first conductive portions and all of the second conductive portions are electrically connected through the sealant to form an unclosed conductor surrounding the display region;
the sealant comprises a plurality of conductive spheres, all of the first conductive portions and all of the second conductive portions are electrically connected through the conductive spheres to form the unclosed conductor surrounding the display region;
each of the first conductive portions and each of the second conductive portions are respectively contacted with the sealant, the unclosed conductor comprises a continuous portion and an unclosed portion, in the continuous portion, any two adjacent ones of the first conductive portions are electrically connected through the conductive spheres and the second conductive portions which is electrically connected with the conductive sphere.

2. The liquid crystal display panel according to claim 1 , wherein the conductive spheres are insulated with each other; orthographic projections of the first conductive portions on the array substrate and orthographic projections of the second conductive portions on the array substrate are alternately arranged along extending directions of four side edges of the array substrate; in the continuous portion, two adjacent orthographic projections are jointed or have an overlapping region, the conductive spheres are located at a joint site or in the overlapping region, such that the first conductive portion and the second conductive portion whose orthographic projections are jointed or have the overlapping region are electrically connected; in the unclosed portion, orthographic projections on the array substrate of the first conductive portion and/or the second conductive portion which are located at two ends of the unclosed portion are not jointed and do not have an overlapping region.

3. The liquid crystal display panel according to claim 2 , wherein each of the first conductive portions is electrically connected with two conductive spheres which are adjacent in the extending directions of four side edges of the array substrate.

4. The liquid crystal display panel according to claim 2 , wherein each of the second conductive portions is electrically connected with two conductive spheres which are adjacent in the extending directions of four side edges of the array substrate.

5. The liquid crystal display panel according to claim 1 , wherein the conductive spheres comprise at least one conductive sphere group, each conductive sphere group comprises at least two conductive spheres which are electrically connected, the conductive sphere groups are insulated from each other; in the continuous portion, orthographic projections of the first conductive portions on the array substrate and orthographic projections of the second conductive portions on the array substrate are alternately arranged along extending directions of four side edges of the array substrate, all of the orthographic projections are not overlapped with each other; the first conductive portion and the second conductive portion whose orthographic projections are adjacent are respectively electrically connected with the two conductive spheres located at two ends of the conductive sphere group in one conductive sphere group; the first conductive portion and/or the second conductive portion which are located at two ends of the unclosed portion are respectively electrically connected with different conductive sphere groups.

6. The liquid crystal display panel according to claim 5 , wherein the conductive spheres further comprise a plurality of independent conductive spheres, and the independent conductive spheres are insulated from each other;
in the continuous portion, orthographic projections on the array substrate of the first conductive portions and the second conductive portions which are electrically connected through the independent conductive spheres are alternately arranged along the extending directions of side edges of the array substrate; two adjacent orthographic projections are jointed or have an overlapping region, the independent conductive spheres are located at a joint site or in the overlapping region, such that the first conductive portion and the second conductive portion whose orthographic projections are jointed or have an overlapping region are electrically connected; in the unclosed portion, orthographic projections on the array substrate of the first conductive portion and/or the second conductive portion which are located at two ends of the unclosed portion of the conductor are not jointed or do not have an overlapping region;
in the continuous portion, orthographic projections on the array substrate of the first conductive portions and the second conductive portions which are electrically connected through the conductive sphere group are alternately arranged along extending directions of side edges of the array substrate, all of the orthographic projections are not overlapped with each other; the first conductive portion and the second conductive portion whose orthographic projections are adjacent are respectively electrically connected with the two conductive spheres located at two ends of the conductive sphere group in one conductive sphere group; in the unclosed portion, the first conductive portion and/or the second conductive portion which are located at two ends of the unclosed portion of the conductor are respectively electrically connected with different conductive sphere groups.

7. The liquid crystal display panel according to claim 1 , further comprising:
a pixel electrode and a common electrode line which are located at the side of the array substrate facing the opposed substrate;
a common electrode located at the side of the opposed substrate facing the array substrate;
a third conductive portion which is located between the array substrate and the sealant, insulated with the pixel electrode and electrically connected with the common electrode line; and
a fourth conductive portion which is located between the opposed substrate and the sealant and electrically connected with the common electrode,
wherein the third conductive portion and the fourth conductive portion are electrically connected through the sealant to electrically connect the common electrode and the common electrode line; the first conductive portions are respectively insulated with the pixel electrode, the common electrode line and the third conductive portion, the second conductive portions are respectively insulated with the common electrode and the fourth conductive portion.

8. The liquid crystal display panel according to claim 7 , wherein the first conductive portions and the pixel electrode are formed from a same layer of material.

9. The liquid crystal display panel according to claim 7 , wherein the second conductive portions and the common electrode are formed from a same layer of material.

10. The liquid crystal display panel according to claim 7 , wherein the third conductive portion and the pixel electrode are formed from a same layer of material.

11. The liquid crystal display panel ac

Assignees

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

Inventors

• Yao Zhixiao
• Feng Bin
• Wang Yuxi
• Chen Weitao

Classifications

• C08K2201/001

  Conductive additives · CPC title

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• C08K2003/0831

  Gold · CPC title

• C08K7/18

  inorganic · CPC title