DISPLAY SUBSTRATE, METHOD FOR MANUFACTURING THE SAME AND DISPLAY DEVICE

• US 20170262126A1
• Filed: 10/13/2016
• Published: 09/14/2017
• Est. Priority Date: 10/30/2015
• Status: Abandoned Application

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: YANG, Shengji, DONG, Xue, XUE, Hailin, CHEN, Xiaochuan, WANG, Haisheng, LIU, Yingming, DING, Xiaoliang, ZHAO, Weijie, LIU, Hongjuan
• Application Number:
  US15/529,892
• Publication Number:
  US 20170262126A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A display substrate, a method for manufacturing the display substrate and a display device are provided. The display substrate includes a basal substrate; a first electrode disposed on the basal substrate, the first electrode being deformable; a middle frame disposed on a side of the basal substrate departing from the first electrode; and a second electrode disposed between the middle frame and the basal substrate, forming a capacitor with the first electrode; the capacitance of the capacitor being variable based on deformation of the first electrode. According to the solution of the embodiments, the second electrode is arranged on the middle frame. The first electrode and the second electrode form a capacitor as a pressure sensor. Therefore, the pressure sensor can be integrated into the display substrate, and the space occupied by the pressure sensor in the display substrate is reduced.

Claims

1. A display substrate comprising:

a basal substrate;

a first electrode disposed on the basal substrate, the first electrode being deformable;

a middle frame disposed on a side of the basal substrate departing from the first electrode; and

a second electrode disposed between the middle frame and the basal substrate, forming a capacitor with the first electrode;

the capacitance of the capacitor being variable based on deformation of the first electrode.

2. The display substrate according to claim 1, further comprising:

an organic light emitting device and a thin film transistor for driving the organic light emitting device disposed on the basal substrate;

wherein the organic light emitting device comprises a bottom electrode layer and a top electrode layer;

the thin film transistor comprises a first gate layer, a second gate layer and a source-drain layer;

and wherein the first electrode is formed in the same layer with any one of the first gate layer, the second gate layer, the source-drain layer and the bottom electrode layer.

3. The display substrate according to claim 1, further comprising:

a liquid crystal layer disposed on the basal substrate;

a thin film transistor, a pixel electrode layer and a common electrode layer for controlling the liquid crystal layer;

the thin film transistor comprising a gate layer and a source-drain layer;

wherein the first electrode is formed in the same layer with any one of the gate layer, the source-drain layer and the pixel electrode layer.

4. The display substrate according to claim 2, wherein the first electrode and the second gate layer are formed in the same layer.

5. The display substrate according to claim 2, wherein the first electrode comprises a plurality of first electrode subunits, and each first electrode subunit has a grid shape.

6. The display substrate according to claim 5, wherein the second electrode comprises a plurality of second electrode subunits, each second electrode subunit has the same area and shape as a corresponding first electrode subunit.

7. The display substrate according to claim 5, wherein the first electrode further comprises a plurality of signal transmission lines connected with the plurality of first electrode subunits in one-to-one correspondence;

wherein the signal transmission lines are disposed in the same layer with the first electrode and extend along a first direction;

the areas of the first electrode subunits gradually decrease along the first direction, thereby providing layout space for the signal transmission lines.

8. The display substrate according to claim 5, wherein the first electrode further comprises a plurality of signal transmission lines connected with the plurality of first electrode subunits in one-to-one correspondence;

wherein the signal transmission line and the first electrode are in different layers, and the plurality of first electrode subunits have the same area and the same shape.

9. The display substrate according to claim 1, further comprising:

a processing unit generating a touch control signal based on a capacitance variation of the capacitor.

10. A display device comprising the display substrate according to claim 1.

18. The display device according to claim 10, further comprising:

an organic light emitting device and a thin film transistor for driving the organic light emitting device disposed on the basal substrate;

wherein the organic light emitting device comprises a bottom electrode layer and a top electrode layer;

the thin film transistor comprises a first gate layer, a second gate layer and a source-drain layer;

and wherein the first electrode is formed in the same layer with any one of the first gate layer, the second gate layer, the source-drain layer and the bottom electrode layer.

19. The display device according to claim 10, further comprising:

a liquid crystal layer disposed on the basal substrate;

a thin film transistor, a pixel electrode layer and a common electrode layer for controlling the liquid crystal layer;

the thin film transistor comprising a gate layer and a source-drain layer;

wherein the first electrode is formed in the same layer with any one of the gate layer, the source-drain layer and the pixel electrode layer.

20. The display device according to claim 18, wherein the first electrode comprises a plurality of first electrode subunits, and each first electrode subunit has a grid shape.

11. A method for manufacturing a display substrate, comprising:

forming a first electrode on a basal substrate, the first electrode being deformable; and

forming a second electrode on a middle frame;

arranging the basal substrate with the first electrode on a side of the middle frame on which the second electrode is formed, thereby forming a capacitor with the first electrode and the second electrode.

12. The method according to claim 11, further comprising:

forming an organic light emitting device and a thin film transistor for driving the organic light emitting device on the basal substrate;

the organic light emitting device comprising a bottom electrode layer and a top electrode layer;

the thin film transistor comprising a first gate layer, a second gate layer and a source-drain layer;

wherein the step of forming the first electrode comprises;

forming the first electrode when forming any one of the first gate layer, the second gate layer, the source-drain layer and the bottom electrode layer.

13. The method according to claim 11, further comprising:

forming a thin film transistor, a pixel electrode layer and a common electrode layer on the basal substrate for controlling a liquid crystal layer;

the thin film transistor comprising a gate layer and a source-drain layer;

wherein the step of forming the first electrode comprises;

forming the first electrode when forming any one of the gate layer, the source-drain layer and the pixel electrode layer.

14. The method according to claim 12 or 13, wherein the step of forming the first electrode comprises forming a plurality of first electrode subunits;

and wherein the step of forming the second electrode comprises forming a plurality of second electrode subunits, the positions of the second electrode subunits are one-to-one corresponding to the positions of the first electrode subunits.

15. The method according to claim 14, wherein the step of forming the first electrode comprises forming a plurality of second electrode subunits with grid shapes.

16. The method according to claim 14, further comprising:

in a layer different from the first electrode subunits, forming a plurality of signal transmission lines connected with the plurality of first electrode subunits in one-to-one correspondence;

wherein the step of forming the first electrode further comprises forming the plurality of first electrode subunits having the same area and the same shape.

17. The method according to claim 14, further comprising:

forming a plurality of signal transmission lines in the same layer with the first electrode subunits;

the plurality of signal transmission lines being connected with the plurality of first electrode subunits in one-to-one correspondence and extending along a first direction;

wherein the step of forming the first electrode further comprises forming the plurality of first electrode subunits;

the areas of the first electrode subunits gradually decreasing along the first direction, thereby providing layout space for the signal transmission lines.