Display panel and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-9946108-B2
Application number	US-201615114850-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Jan 28, 2016
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

The present invention provides a display panel and a manufacture method thereof. By locating the matrix electrode corresponding to the black matrix on one side of the color film substrate, which is close to the liquid crystal layer, and because the matrix electrode is coupled to the common electrode signal, no voltage difference exists between the matrix electrode and the common electrode, and no matter in condition of being electrified or not electrified, the liquid crystal layer between the matrix electrode and the common electrode of the array substrate is not orientated and constantly appears in an opaque state so that no interference generates to light between adjacent pixels of the panel to eliminate the large view angle color washout of the panel and to improve the display quality of the LTPS display panel.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising a color film substrate and an array substrate which are oppositely positioned, and a liquid crystal layer filled between the color film substrate and the array substrate;
wherein the color film substrate comprises a first substrate, a black matrix and a color resist layer located on the first substrate, a flat layer located on the color resist layer, and a matrix electrode located on the flat layer and located corresponding to the black matrix; the matrix electrode is coupled to a common electrode signal;
the array substrate comprises a second substrate, a TFT layer located on the second substrate, a pixel electrode located on the TFT layer, an insulation layer located on the pixel electrode, and a common electrode located on the insulation layer;
because the matrix electrode is coupled to the common electrode signal, no voltage difference exists between the matrix electrode and the common electrode, and no matter in condition of being electrified or not electrified, the liquid crystal layer between the matrix electrode and the common electrode is not orientated and constantly appears in an opaque state so that no interference generates to light between adjacent pixels of the panel to eliminate large view angle color washout of the panel.

2. The display panel according to claim 1 , wherein the black matrix comprises a plurality of horizontal light shielding strips and a plurality of vertical light shielding strips, and the plurality of horizontal light shielding strips and the plurality of vertical light shielding strips are perpendicularly and crosswise aligned;
the matrix electrode comprises a plurality of horizontal strip electrodes located corresponding to the plurality of horizontal light shielding strips, and a plurality of vertical strip electrodes located corresponding to the plurality of vertical light shielding strips, and the plurality of horizontal strip electrodes and the plurality of vertical strip electrodes are perpendicularly and crosswise aligned.

3. The display panel according to claim 2 , wherein widths of the horizontal light shielding strips and the vertical light shielding strips of the black matrix are respectively larger than widths of the horizontal strip electrodes and the vertical strip electrodes of the matrix electrode.

4. The display panel according to claim 1 , wherein the color resist layer comprises a plurality of first, second, third color resist blocks, which are separated apart by the black matrix; the first, the second, the third color resist blocks are alignment combinations of red, green and blue resist blocks in arbitrary orders.

5. The display panel according to claim 1 , wherein material of the flat layer is organic photoresist; material of the matrix electrode, the pixel electrode and the common electrode is Indium Tin Oxide, Aluminum Tin Oxide, Aluminum Zinc Oxide or Indium Germanium Zinc Oxide; material of the insulation layer is Silicon Oxide, Silicon Nitride or a combination of the two.

6. A manufacture method of a display panel, comprising steps of:
step 1, providing a first substrate, and coating black light shielding material on the first substrate to form a black light shielding layer, and employing a photolithographic process to pattern the black light shielding layer to obtain a black matrix;
step 2, forming a color resist layer on the black matrix and the first substrate, and forming a flat layer on the color resist layer;
step 3, depositing transparent conductive material on the flat layer to form a transparent conductive layer, and employing a photolithographic process to pattern the transparent conductive layer to obtain a matrix electrode, which is located corresponding to the black matrix to manufacture a color film substrate;
step 4, providing an array substrate, wherein the array substrate comprises a second substrate, a TFT layer located on the second substrate, a pixel electrode located on the TFT layer, an insulation layer located on the pixel electrode, and a common electrode located on the insulation layer;
aligning the array substrate and the color film substrate to form cell, and injecting liquid crystal molecules between the array substrate and the color film substrate to form a liquid crystal layer to obtain a LTPS display panel.

7. The manufacture method of the display panel according to claim 6 , wherein the black matrix comprises a plurality of horizontal light shielding strips and a plurality of vertical light shielding strips, and the plurality of horizontal light shielding strips and the plurality of vertical light shielding strips are perpendicularly and crosswise aligned;
the matrix electrode comprises a plurality of horizontal strip electrodes located corresponding to the plurality of horizontal light shielding strips, and a plurality of vertical strip electrodes located corresponding to the plurality of vertical light shielding strips, and the plurality of horizontal strip electrodes and the plurality of vertical strip electrodes are perpendicularly and crosswise aligned.

8. The manufacture method of the display panel according to claim 7 , wherein widths of the horizontal light shielding strips and the vertical light shielding strips of the black matrix are respectively larger than widths of the horizontal strip electrodes and the vertical strip electrodes of the matrix electrode.

9. The manufacture method of the display panel according to claim 6 , wherein the color resist layer comprises a plurality of first, second, third color resist blocks, which are separated apart by the black matrix; the first, the second, the third color resist blocks are alignment combinations of red, green and blue resist blocks in arbitrary orders.

10. The manufacture method of the display panel according to claim 6 , wherein material of the flat layer is organic photoresist; material of the matrix electrode, the pixel electrode and the common electrode is Indium Tin Oxide, Aluminum Tin Oxide, Aluminum Zinc Oxide or Indium Germanium Zinc Oxide; material of the insulation layer is Silicon Oxide, Silicon Nitride or a combination of the two.

11. A liquid crystal display panel, comprising a color film substrate and an array substrate which are oppositely positioned, and a liquid crystal layer filled between the color film substrate and the array substrate;
wherein the color film substrate comprises a first substrate, a black matrix and a color resist layer located on the first substrate, a flat layer located on the color resist layer, and a matrix electrode located on the flat layer and located corresponding to the black matrix; the matrix electrode is coupled to a common electrode signal;
the array substrate comprises a second substrate, a TFT layer located on the second substrate, a pixel electrode located on the TFT layer, an insulation layer located on the pixel electrode, and a common electrode located on the insulation layer;
because the matrix electrode is coupled to the common electrode signal, no voltage difference exists between the matrix electrode and the common electrode, and no matter in condition of being electrified or not electrified, the liquid crystal layer between the matrix electrode and the common electrode is not orientated and constantly appears in an opaque state so that no interference generates to light between adjacent pixels of the panel to eliminate large view angle color washout of the panel;
wherein the black matrix comprises a plurality of horizontal light shielding strips and a plurality of vertical light shielding strips, and the plurality of horizontal light shielding strips and the plurality of vertical light shielding strips are perpendicularl

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Yu Xiaojiang

Classifications

• G02F2202/104

  poly-Si · CPC title

• G02F2001/133354

  Physics · mapped topic

• G02F1/1341

  Filling or closing of cells · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/133512 Primary

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