Backplate having graphene layer on polyethylene terephthalate layer and flexible display panel thereof

• US 11,056,671 B2
• Filed: 04/17/2019
• Issued: 07/06/2021
• Est. Priority Date: 01/30/2019
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Inventors: Zheng, Changpin
• Primary Examiner(s): Jung, Michael
• Application Number:
  US16/493,527
• Publication Number:
  US 20200280019A1
• Time in Patent Office: 811 Days
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/87 Arrangements for heating or cooling
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/16 using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
• CPC Class Codes: H10K 71/80 using temporary substrates

Abstract

The present disclosure provides a backplate and a flexible display panel thereof. Wherein the backplate includes a polyethylene terephthalate (PET) layer, and a graphene layer disposed on the PET layer. The present disclosure provides a backplate, which adopts a novel hierarchical structure design of graphene material, so that it realizes function of a current backplate while adding new heat dissipation functions. Compared with the current flexible display panel, the flexible display panel reduced a corresponding heat dissipation function layer, therefore having an effectively reduced thickness, and improved folding performance.

Claims

1. A backplate, comprising:

a polyethylene terephthalate (PET) layer;

a graphene layer disposed on the PET layer;

a pressure sensitive adhesive layer disposed on the graphene layer;

a first release film layer disposed on the pressure sensitive adhesive layer and is an easy release film layer; and

a second release film layer disposed under the PET layer and is a heavy release film layer, wherein a release force on the heavy release film layer is greater than a release force of the easy release film layer.

2. The backplate as claimed in claim 1, wherein the graphene layer is formed on the PET layer by a deposition method.

3. The backplate as claimed in claim 2, wherein the graphene layer is formed on the PET layer by low pressure chemical vapor deposition method or standard atmospheric pressure chemical vapor deposition method.

4. A flexible display panel, comprising the backplate as claimed in claim 1.

5. The flexible display panel as claimed in claim 4, which is composed of the backplate and an organic light emitting diode (OLED) layer, a touch layer and a glass layer, which are sequentially disposed on the backplate.