DISPLAY SUBSTRATE, DISPLAY PANEL, DISPLAY DEVICE, AND CONTROL METHOD THEREOF

• US 20190042044A1
• Filed: 05/17/2018
• Published: 02/07/2019
• Est. Priority Date: 08/07/2017
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhao, Lijun, Guo, Yuzhen, Wang, Haisheng, Liu, Yingming, Jia, Yanan
• Granted Patent: US 10,642,402 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04144 using an array of force sensing means position sensing using the local deformation of sensor cells G06F3/0447
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8051 Anodes
• CPC Class Codes: H10K 59/8052 Cathodes
• CPC Class Codes: H10K 77/111 Flexible substrates

Abstract

A display substrate includes a conductive pattern arranged on a base substrate, a plurality of pressure sensing units arranged on the base substrate, and a first pressure sensing line and a second pressure sensing line connected to the plurality of pressure sensing units and each configured to output a pressure sensing signal. At least one of the first pressure sensing line or the second pressure sensing line is within a same layer and made of a same material as the conductive pattern, or the conductive pattern is multiplexed as at least one of the first pressure sensing line or the second pressure sensing line.

Claims

1. A display substrate, comprising:

a base substrate;

a conductive pattern arranged on the base substrate;

a plurality of pressure sensing units arranged on the base substrate; and

a first pressure sensing line and a second pressure sensing line connected to the plurality of pressure sensing units and configured to output a pressure sensing signal,

wherein at least one of the first pressure sensing line or the second pressure sensing line is within a same layer and made of a same material as the conductive pattern, or the conductive pattern is multiplexed as at least one of the first pressure sensing line or the second pressure sensing line.

2. The display substrate according to claim 1, wherein the pressure sensing unit comprises a first pressure sensing electrode connected to the first pressure sensing line, a second pressure sensing electrode connected to the second pressure sensing line, and a piezoelectric layer arranged between the first pressure sensing electrode and the second pressure sensing electrode.

3. The display substrate according to claim 2, wherein the display substrate is an organic light-emitting diode (OLED) display substrate, and the conductive pattern comprises a plurality of cathodes arranged independent of each other and multiplexed as the first pressure sensing line.

4. The display substrate according to claim 3, wherein the second pressure sensing line is formed separately, and the first pressure sensing electrode and the first pressure sensing line are formed integrally or through different processes.

5. The display substrate according to claim 2, wherein the display substrate is an OLED display substrate, the conductive pattern comprises a plurality of cathodes and a plurality of anodes arranged independent of each other, the cathode is multiplexed as the second pressure sensing line, and the first pressure sensing line is within a same layer and made of a same material as the anode, and arranged independent of the anode.

6. The display substrate according to claim 5, wherein the first pressure sensing electrode and the first pressure sensing line are formed integrally or through different processes, and the second pressure sensing electrode and the second pressure sensing line are formed integrally or through different processes.

7. The display substrate according to claim 2, wherein the display substrate is an OLED display substrate, the conductive pattern comprises a cathode and an anode of the OLED display substrate, the first pressure sensing line is within a same layer and made of a same material as the anode, and arranged independent of the anode, and the second pressure sensing line is within a same layer and made of a same material as the anode, and arranged independent of the anode.

8. The display substrate according to claim 7, wherein the first pressure sensing electrode and the first pressure sensing line are formed integrally or through different processes, and the second pressure sensing electrode and the second pressure sensing line are formed integrally or through different processes.

9. The display substrate according to claim 2, wherein the display substrate is an OLED display substrate, the conductive pattern comprises a data line and an anode of the OLED display substrate, the data line of the OLED display substrate is multiplexed as the first pressure sensing line, and the second pressure sensing line is within a same layer and made of a same material as the anode, and arranged independent of the anode.

10. The display substrate according to claim 9, wherein the second pressure sensing electrode and the second pressure sensing line are formed integrally or through different processes.

11. The display substrate according to claim 2, wherein the display substrate is an OLED display substrate, the conductive pattern comprises a data line and an electrode of a storage capacitor of the OLED display substrate, the electrode of the storage capacitor is multiplexed as the first pressure sensing line, and the data line of the OLED display substrate is multiplexed as the second pressure sensing line.

12. The display substrate according to claim 2, wherein the display substrate is an OLED display substrate, the conductive pattern comprises a first electrode and a second electrode of a storage capacitor of the OLED display substrate, the first electrode is multiplexed as the first pressure sensing line, and the second electrode is multiplexed as the second pressure sensing line.

13. The display substrate according to claim 1, wherein the base substrate is a flexible substrate.

14. The display substrate according to claim 2, wherein the piezoelectric layer is made of plumbum-based lanthanum-doped zirconate titanate (PZT), and the first pressure sensing electrode and the second pressure sensing electrode are both made of 3,4-ethylenedioxythiophene monomer.

15. The display substrate according to claim 1, wherein when the display substrate is an array substrate of a liquid crystal display panel, the conductive pattern comprises a pixel electrode, a common electrode and a data line, and when the display substrate is an OLED display substrate, the conductive pattern comprises an anode, a cathode, a first electrode and a second electrode of a storage capacitor, and a data line of the OLED display substrate.

16. A display panel comprising the display substrate according to claim 1.

17. A display device comprising the display panel according to claim 16.

18. A method for controlling the display device according to claim 17, comprising a step of, a conductive pattern of a display substrate is multiplexed as at least one of a first pressure sensing line or a second pressure sensing line, within a display time period of each frame, applying a common voltage signal to a cathode or a common electrode of the display substrate and applying a data voltage signal to an anode or a pixel electrode of the display substrate, and within a pressure detection time period of each frame, detecting a pressure sensing signal on each of the first pressure sensing line and the second pressure sensing line.

19. The method according to claim 18, wherein the display substrate is an organic light-emitting diode (OLED) display substrate and the conductive pattern is a cathode, the method comprises:

within the display time period of each frame, applying the common voltage signal to the cathode of the OLED display substrate; and

within the pressure detection time period of each frame, detecting the pressure sensing signal on the cathode of the OLED display substrate.

20. The method according to claim 18, wherein the display substrate is an OLED display substrate and the conductive pattern is a data line, the method comprises:

within the display time period of each frame, applying the data voltage signal to the data line of the OLED display substrate; and

within the pressure detection time period of each frame, detecting the pressure sensing signal on the data line of the OLED display substrate.