Color filter substrate, fabrication method thereof and display panel

Patent metadata

Field	Value
Publication number	US-10620764-B2
Application number	US-201816012948-A
Country	US
Kind code	B2
Filing date	Jun 20, 2018
Priority date	Oct 23, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

The present disclosure relates to a color filter substrate, a fabrication method thereof, and a display panel. The color filter substrate includes: a substrate including a first surface and a second surface opposite to each other; a color filter film disposed on the first surface of the substrate; and a force sensitive film disposed on the second surface of the substrate. Further, the force sensitive film is configured to act as a conductor when no pressure is applied and as a non-conductor when under pressure.

First claim

The invention claimed is:

1. A color filter substrate, comprising:
a substrate, comprising a first surface and a second surface opposite to each other;
a color filter film, disposed on the first surface of the substrate; and
a force sensitive film, disposed on the second surface of the substrate, wherein
the force sensitive film is electrically conductive with a zero pressure applied thereon, but becomes electrically isolated at least at a portion to which a non-zero pressure is applied.

2. The color filter substrate according to claim 1 , wherein
the force sensitive film comprises a plurality of force sensitive sub-cells arranged in an array, and two adjacent force sensitive sub-cells are connected by a lead of a preset width.

3. The color filter substrate according to claim 2 , wherein
the color filter substrate is configured to be aligned with an array substrate, the array substrate is provided with a plurality of touch sensors arranged in an array, wherein
an orthographic projection of each force sensitive sub-cell on the array substrate overlaps with a corresponding touch sensor.

4. The color filter substrate according to claim 3 , further comprising: a conductive unit having a first end and a second end, wherein
the first end of the conductive unit is connected to the force sensitive film, and the second end of the conductive unit is connected to a ground terminal, for transferring static electricity on the force sensitive film to the ground terminal.

5. The color filter substrate according to claim 4 , wherein
the conductive unit is made of silver paste,
the ground terminal is located on the array substrate,
the first end of the conductive unit is coated on the force sensitive film, and
the second end of the conductive unit is bridged to the ground terminal on the array substrate.

6. The color filter substrate according to claim 1 , wherein
the force sensitive film is made of doped zinc oxide.

7. A display panel, comprising:
an array substrate; and
the color filter substrate according to claim 1 .

8. The display panel according to claim 7 , wherein
the force sensitive film comprises a plurality of force sensitive sub-cells arranged in an array, and two adjacent force sensitive sub-cells are connected by a lead of a preset width.

9. The display panel according to claim 8 , wherein
the color filter substrate is configured to be aligned with an array substrate, the array substrate is provided with a plurality of touch sensors arranged in an array, wherein
an orthographic projection of each force sensitive sub-cell on the array substrate overlaps with a corresponding touch sensor.

10. The display panel according to claim 9 , further comprising: a conductive unit having a first end and a second end, wherein
the first end of the conductive unit is connected to the force sensitive film, and the second end of the conductive unit is connected to a ground terminal, for transferring static electricity on the force sensitive film to the ground terminal.

11. The display panel according to claim 10 , wherein
the conductive unit is made of silver paste,
the ground terminal is located on the array substrate,
the first end of the conductive unit is coated on the force sensitive film, and
the second end of the conductive unit is bridged to the ground terminal on the array substrate.

12. The display panel according to claim 7 , wherein
the force sensitive film is made of doped zinc oxide.

13. A method for fabricating a color filter substrate, comprising:
providing a substrate, wherein the substrate comprises a first surface and a second surface opposite to each other;
forming a color filter film on the first surface of the substrate; and
forming a force sensitive film on the second surface of the substrate,
wherein the force sensitive film is electrically conductive with a zero pressure applied thereon, but becomes electrically isolated at least at a portion to which a non-zero pressure is applied.

14. The method according to claim 13 , further comprising:
after forming the force sensitive film on the second surface of the substrate, continuing to form a conductive unit on the second surface of the color filter substrate, wherein
the conductive unit has a first end and a second end, the first end of the conductive unit is connected to the force sensitive film, and the second end of the conductive unit is connected to a ground terminal, for transferring static electricity on the force sensitive film to the ground terminal.

15. The fabrication method according to claim 14 , wherein
the color filter substrate is configured to be aligned with an array substrate,
the ground terminal is disposed on the array substrate, and
the conductive unit is formed by using silver paste, so that the first end of the conductive unit is coated on the force sensitive film, and the second end of the conductive unit is bridged to the ground terminal on the array substrate.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Sun Dongling
• Yin Xiaobin
• Zhu Zhengwei
• Hu Wencheng

Classifications

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G02F2202/22

  Antistatic materials or arrangements · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G02F1/133516

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title