Display panel with pixel defining layer and manufacturing method of pixel defining layer

• US 9,466,650 B2
• Filed: 11/06/2014
• Issued: 10/11/2016
• Est. Priority Date: 08/22/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Huifeng, Liu, Ze
• Primary Examiner(s): YUSHIN, NIKOLAY K
• Application Number:
  US14/534,866
• Publication Number:
  US 20160056218A1
• Time in Patent Office: 705 Days
• US Class Current: 1/1
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 71/13 using printing techniques, e.g. ink-jet printing or screen printing

Abstract

Embodiments of the present invention provide a display panel with a pixel defining layer and a manufacturing method of the pixel defining layer, and the display panel with the pixel defining layer comprises: a substrate; a plurality of pixel regions, arranged on the substrate in a matrix form; the pixel defining layer, disposed on the substrate and comprising: a plurality of openings; a pixel divider, surrounding each of the plurality of openings and defining the plurality of pixel regions, wherein a sidewall of the pixel divider for defining each of the pixel regions is formed so that a slope angle of an upper portion is larger than that of a lower portion thereof.

Claims

1. A display panel with a pixel defining layer, comprising:

a substrate;

a plurality of pixel regions, arranged on the substrate in a matrix form;

the pixel defining layer, disposed on the substrate and comprising;

a plurality of openings;

a pixel divider, surrounding each of the plurality of openings and defining the plurality of pixel regions,

wherein a sidewall of the pixel divider for defining each of the pixel regions is formed so that a slope angle of an upper portion is larger than that of a lower portion thereof,

wherein, in the direction toward the substrate, the sidewall for defining each of the pixel regions is formed so that the slope angle increases first and then decreases from an upper surface of the pixel divider to a lower surface of the pixel divider,

wherein, the slope angle of the lower portion of the sidewall of the pixel divider is substantially zero at an interface between the pixel divider and the substrate.

2. The display panel with the pixel defining layer according to claim 1, wherein, a height of the pixel divider is 1 μ

m-5 μ

m.

3. The display panel with the pixel defining layer according to claim 1, wherein, in a direction toward the substrate, the slope angle of the lower portion of the sidewall of the pixel divider gradually decreases.

4. The display panel with the pixel defining layer according to claim 3, wherein, in a direction toward the substrate, the slope angle of the upper portion of the sidewall gradually increases.

5. The display panel with the pixel defining layer according to claim 3, wherein, at the lower portion, the sidewall is formed to be a smooth curved surface.

6. The display panel with the pixel defining layer according to claim 1, wherein, the upper portion of the pixel divider is lyophobic and the lower portion of the pixel divider is lyophilic.

7. The display panel with the pixel defining layer according to claim 6, wherein, the upper portion of the pixel divider is formed of lyophobic material, and the lower portion of the pixel divider is formed of lyophilic material.

8. The display panel with the pixel defining layer according to claim 6, wherein, the pixel divider is formed of dual-functional pixel defining material with upper-lower opposite-property.

9. The display panel with the pixel defining layer according to claim 8, wherein, the dual-functional pixel defining material with upper-lower opposite-property is a photosensitive material.

10. A manufacturing method of a pixel defining layer, comprising:

providing a substrate;

forming a pixel defining material layer on the substrate;

patterning the pixel defining material layer through a patterning process, to form the pixel defining layer comprising a plurality of openings and a pixel divider,

wherein the pixel divider surrounds each of the openings and defines pixel regions, and a sidewall of the pixel divider for defining the pixel regions is formed so that a slope angle of an upper portion is larger than that of a lower portion thereof,

wherein, in the direction toward the substrate, the sidewall for defining each of the pixel regions is formed so that the slope angle increases first and then decreases from an upper surface of the pixel divider to a lower surface of the pixel divider,

wherein, the slope angle of the lower portion of the sidewall is substantially zero at an interface between the pixel divider and the substrate.

11. The manufacturing method of the pixel defining layer according to claim 10, wherein,

the forming the pixel defining material layer on the substrate comprises:

coating a lyophilic material layer on the substrate;

coating a lyophobic material layer on the lyophilic material layer; and

the patterning the pixel defining material layer through a pattering process to form the pixel defining layer comprising the plurality of openings and the pixel divider comprises;

patterning the lyophobic material layer and the lyophilic material layer by using the mask through a patterning process to form the plurality of openings.

12. The manufacturing method of the pixel defining layer according to claim 10, wherein, in a direction toward the substrate, the slope angle of the lower portion of the sidewall gradually decreases.

13. The manufacturing method of the pixel defining layer according to claim 10, wherein,

the forming the pixel defining material layer on the substrate comprises:

coating a layer of dual-functional pixel defining material with upper-lower opposite-property on the substrate; and

the patterning the pixel defining material layer through a patterning process to form the pixel defining layer comprising the plurality of openings and the pixel divider comprises;

pre-baking the pixel defining material layer;

exposing the pixel defining material layer by using a mask;

developing the pixel defining material layer; and

post-baking the pixel defining material layer,

wherein the pixel divider is lyophobic at its upper portion while is lyophilic at its lower portion.

14. The manufacturing method of the pixel defining layer according to claim 13, wherein,

the coating the layer of the dual-functional pixel defining material with upper-lower opposite-property on the substrate comprises:

obtaining the pixel defining material layer with a thickness of 0.1 μ

m-100 μ

m by spin coating on the substrate at a speed of 100 rpm-5000 rpm;

the pre-baking the pixel defining material layer comprises;

performing the pre-baking at 100°

C.-200°

C.;

the exposing the pixel defining material layer by using a mask comprises;

performing the exposing under a condition that a distance between the mask and the pixel defining material layer is 5 μ

m-500 μ

m and an exposing energy is 20 mj/cm²-1000 mj/cm².