Display panel and manufacture method thereof

• US 9,946,108 B2
• Filed: 05/26/2016
• Issued: 04/17/2018
• Est. Priority Date: 01/28/2016
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Yu, Xiaojiang
• Primary Examiner(s): Vu, Phu
• Application Number:
  US15/114,850
• Publication Number:
  US 20180011370A1
• Time in Patent Office: 691 Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/134381 Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G02F 2202/104 poly-Si

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.

Claims

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 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;

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.

12. The display panel according to claim 11, 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.

13. The display panel according to claim 11, 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.