Display panel and method for manufacturing the same

• US 10,712,604 B2
• Filed: 10/31/2017
• Issued: 07/14/2020
• Est. Priority Date: 10/31/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectric Technology Co. Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Ni, Huan, Lv, Fengzhen, Zhang, Xinxia, Yao, Chengpeng, Guo, Xiao, Xie, Xiaolong, Li, Qun, Lv, Kui
• Primary Examiner(s): Tran, Binh X
• Application Number:
  US15/798,707
• Publication Number:
  US 20180120627A1
• Time in Patent Office: 987 Days
• Field of Search: 216 4, 216 5, 216 24
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 2202/023 curable
• CPC Class Codes: G02F 2202/025 thermocurable

Abstract

The present invention provides a display panel and a method for manufacturing the same. The method comprises steps of forming a black matrix and forming a sealant, wherein the black matrix layer contains a thermochromic material at the position corresponding to the sealant, so that when the sealant is cured with ultraviolet light, the thermochromic material layer is transparent. In such case, a side of the first substrate away from the sealant can be irradiated and ultraviolet light passes through the first substrate and the thermochromic material to cure the sealant, thus achieving a uniform irradiation of ultraviolet light and a high curing efficiency. After the sealant is cured, the thermochromic material can become black by changing the temperature thereof so as to avoid the light leakage.

Claims

1. A method for manufacturing a display panel, characterized by comprising steps of:

forming a black matrix on a first substrate;

disposing a sealant;

curing the sealant by irradiating from a side of the first substrate away from the sealant, wherein a thermochromic material keeps transparent before the completion of the curing; and

making the thermochromic material black by changing the thermochromic material'"'"'s temperature,

wherein the step of forming a black matrix on a first substrate comprises;

forming the black matrix in a non-display region with a black material and making a position corresponding to the sealant in the black matrix being blank; and

the step of disposing a sealant comprises;

disposing a sealant containing the thermochromic material and disposing a sealant without the thermochromic material, wherein the sealant containing the thermochromic material is only disposed at the blank position, whereas the sealant without the thermochromic material is disposed at an edge position between the black matrix layer and a second substrate,

wherein an orthographic projection of the sealant containing the thermochromic material on the first substrate overlaps with an orthographic projection of the sealant without the thermochromic material in a plane parallel with the first substrate, whereas the orthographic projections of the sealants do not overlap with an orthographic projection of the black matrix on the first substrate.

2. The method for manufacturing a display panel according to claim 1, characterized in that, the sealant containing the thermochromic material further includes a sealant base material, wherein the mass ratio of the sealant base material to the thermochromic material is 1:

(0.01-0.2).

3. The method for manufacturing a display panel according to claim 1, characterized in that, making a position corresponding to the sealant in the black matrix being blank comprises:

directly forming the blank position at the time of forming the black matrix in the non-display region using a mask plate;

or firstly forming the black matrix in the non-display region and then photoetching and developing the black matrix at the position corresponding to the sealant so as to remove it.

4. The method for manufacturing a display panel according to claim 1, characterized in that, the thermochromic material comprises an irreversible chromatic material and a reversible chromatic material.

5. The method for manufacturing a display panel according to claim 1, characterized in that, the thermochromic material comprises a microcapsule with an inorganic thermochromic material as a core material and a polymeric material as a shell material, wherein the microcapsule has a particle size between 10 nm to 120 nm.

6. The method for manufacturing a display panel according to claim 1, characterized in that, the thermochromic material comprises an organic thermochromic material and an inorganic thermochromic material.

7. The method for manufacturing a display panel according to claim 6, characterized in that, the organic thermochromic material comprises any one or two materials selected from triarylmethane and/or fluorane.

8. The method for manufacturing a display panel according to claim 6, characterized in that, the organic thermochromic material comprises

9. The method for preparing a display panel according to claim 6, characterized in that, the inorganic thermochromic material comprises (NH₄)VO₃ or a mixture of PbCO₃/Pb(OH)₂/ZnS.