COLOUR FILTER, DISPLAY APPARATUS AND METHOD FOR MANUFACTURING COLOUR FILTER

• US 20190317363A1
• Filed: 12/30/2016
• Published: 10/17/2019
• Est. Priority Date: 12/30/2016
• Status: Active Grant

• Current Assignee: TUNGHSU GROUP Co., Ltd., Tunghsu（Kunshan）Display material Co., Ltd., Tunghsu Optoelectronic Technology Co.,Ltd.
• Original Assignee: Tunghsu（Kunshan）Display material Co., Ltd.
• Inventors: SHIAU, Yihau
• Granted Patent: US 10,802,329 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02F 1/133357 Planarisation layers
• 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 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133519 Overcoatings
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

A color filter, a display apparatus, and a method for preparing the color filter. The color filter comprises: a substrate, black matrices formed on the substrate; color layers formed on the substrate, wherein the color layers comprise red pixel layers (R), green pixel layers (G), blue pixel layers (B), and transparent pixel layers (W); a planarization layer (OC) formed above the color layers and the black matrices; and columnar layers (PS) formed on the planarization layer (OC) and located above the black matrices. The transparent pixel layers (W) are covered in the red pixel layers (R), the green pixel layers (G) and the blue pixel layers (B) by the red pixel layers (R), the green pixel layers (G) and the blue pixel layers (B), respectively.

Claims

1. A color filter, comprising:

a substrate,

black matrices formed on the substrate,

color layers formed on the substrate, wherein the color layer comprises a red pixel layer, a green pixel layer, a blue pixel layer, and a transparent pixel layer,

a planarization layer formed above the color layers and the black matrices, and

columnar layers formed on the planarization layer and located above the black matrix, wherein

transparent pixel layers are covered in the red pixel layers, the green pixel layers, and the blue pixel layers by the red pixel layers, the green pixel layers, and the blue pixel layers respectively.

2. The color filter of claim 1, wherein the columnar layers comprises sub columnar layers and main columnar layers, the height difference between heights of the film thickness for the respective main columnar layers is controlled within the range of ±

0.1 μ

m.

3. The color filter of claim 1, wherein the height of the transparent pixel layer formed on the substrate (W height)≤

the height of the black matrix formed on the substrate (BM height)+0.2 nm, that is, the A value=W height−

BM height≤

0.2 μ

m.

6. The color filter of claim 1, wherein the transparent pixel layers formed on the substrate and covered in each of the red pixel layers, the green pixel layers, and the blue pixel layers are disconnected.

7. The color filter of claim 6, wherein the distance between the transparent pixel layers disconnected from each other is above 5 μ

m.

8. The color filter of claim 1, wherein the substrate is a glass substrate, and the color filter further comprises a conductive layer formed on the back of the substrate.

9. The color filter of claim 1, wherein the photoresist material used in the respective structures forming the color filter is a negative photoresist material.

10. A display panel, comprising the color filter as claimed in claim 1.

11. A display apparatus, comprising the display panel as claimed in claim 10.

13. The method of claim 12, wherein the color filter prepared thereby is the color filter as claimed in claim 1.

4. A color filter, comprising:

a substrate,

black matrices formed on the substrate,

color layers formed on the substrate, wherein the color layer comprises a red pixel layer, a green pixel layer, a blue pixel layer, and a transparent pixel layer,

columnar layers formed on the black matrix, wherein

transparent pixel layers are covered in the red pixel layers, the green pixel layers, and the blue pixel layers by the red pixel layers, the green pixel layers, and the blue pixel layers respectively; and

wherein

the columnar layers comprise sub columnar layers and main columnar layers, the height difference between heights of the film thickness for the respective main columnar layers is controlled within the range of ±

0.1 μ

m.

5. A color filter, comprising:

a substrate,

black matrices formed on the substrate,

color layers formed on the substrate, wherein the color layer comprises a red pixel layer, a green pixel layer, a blue pixel layer, and a transparent pixel layer,

columnar layers formed on the black matrix, wherein

the transparent pixel layers are covered in the red pixel layers, the green pixel layers, and the blue pixel layers by the red pixel layers, the green pixel layers, and the blue pixel layers respectively; and

wherein

the height of the transparent pixel layer formed on the substrate (W height)≤

the height of the black matrix formed on the substrate (BM height)+0.2 μ

m, that is, the A value=W height−

BM height≤

0.2 μ

m.

12. A method for preparing a color filter, comprising the following steps:

performing ITO film plating on the rear surface of a substrate of the color filter,

forming black matrices on the front surface of the substrate,

forming transparent pixel layers in the gaps between the respective black matrices formed on the front surface of the substrate,

forming red pixel layers, green pixel layers and blue pixel layers on the substrate by covering the transparent pixel layers,

optionally forming a planarization layer above the red pixel layers, the green pixel layers, the blue pixel layers and the black matrix, and

forming the columnar layers on the planarization layer and above the corresponding black matrices, or forming the columnar layers on the corresponding black matrices without the planarization layer.