Organic light-emitting diode display having a plurality of electrodes for touch recognition

• US 9,997,574 B2
• Filed: 05/20/2016
• Issued: 06/12/2018
• Est. Priority Date: 08/12/2015
• Status: Active Grant

• 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, Wang, Panhua, Xue, Hailin, Chen, Xiaochuan, Wang, Haisheng, Liu, Yingming, Zhao, Weijie
• Primary Examiner(s): Chambliss, Alonzo
• Application Number:
  US15/500,595
• Publication Number:
  US 20170221972A1
• Time in Patent Office: 753 Days
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/60 OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors

Abstract

The present disclosure provides an organic light-emitting diode (OLED) display substrate. The OLED display substrate includes a substrate and a plurality of organic light-emitting diode units. An organic light-emitting diode unit includes a first layer having an anode and a first electrode apart from the anode; an organic light-emitting layer; a cathode; and a second electrode insulated from the cathode. The anode and the cathode are configured to drive the organic light-emitting layer to emit light; and the first electrode and the second electrode are configured to recognize touch patterns.

Claims

1. An organic light-emitting diode (OLED) display substrate, comprising:

a substrate and a plurality of organic light-emitting diode units, wherein an organic light-emitting diode unit comprises;

a first layer comprising an anode and a first electrode apart from the anode;

an organic light-emitting layer;

a cathode; and

a second electrode insulated from the cathode,

wherein;

the organic light-emitting layer is between the first electrode and the second electrode,

the anode and the cathode are configured to drive the organic light-emitting layer to emit light; and

the first electrode and the second electrode are configured to recognize touch patterns.

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

a current-detecting terminal, wherein;

the first electrode is connected to the current-detecting terminal.

3. The OLED display substrate according to claim 2, wherein the first electrode layer and the second electrode are configured to form a photodiode;

and

the anode, the organic light-emitting layer, and the cathode are configured to form a pixel unit.

4. The OLED display substrate according to claim 2, wherein the organic light-emitting unit further comprises an insulating layer, the insulating layer being between the second electrode and the cathode.

5. The OLED display substrate according to claim 4, further comprising:

a plurality of readout lines, a plurality of control lines, and a plurality of reading transistors, wherein;

a reading transistor comprises a gate electrode;

the readout lines are aligned along a first direction, a readout line being connected to a current-detecting terminal;

the first electrodes of the plurality of organic light-emitting diode units are aligned along the first direction, a first electrode being connected to a readout line through a reading transistor; and

the control lines are aligned along a second direction perpendicular to the first direction, a control line being connected to gate electrodes of reading transistors along the second direction.

6. The OLED display substrate according to claim 5, wherein:

a readout line is configured to transmit signals from a photodiode connected to the readout line through a current-detecting terminal; and

a control line is configured to control states of connected reading transistors.

7. The OLED display substrate according to claim 6, wherein a control line is configured to connect pixel unit aligned along the second direction for controlling scanning of pixel units and photodiodes in a same row.

8. The OLED display substrate according to claim 7, wherein a pixel unit comprises a plurality of pixel transistors, the pixel transistors and the reading transistors being of a same type.

9. A semiconductor device, comprising the OLED display substrate according to claim 1.

10. An operating method for recognizing a light-reflecting surface structure using the OLED display substrate according to claim 1, comprising:

displaying an image in the plurality of organic light-emitting units;

detecting an electric current generated in an organic light-emitting diode unit;

determining whether there is light reflected by the light-reflecting surface structure in each organic light-emitting diode unit; and

determining a touch pattern of the light-reflecting surface structures.

11. The operating method according to claim 10, wherein the detecting the electric current generated in an organic light-emitting diode unit further comprises:

comparing electric currents generated by photodiodes in adjacent organic light-emitting diode units and determining whether an electric current is associated with light reflected by the light-reflecting surface structure; and

determining organic light-emitting diode units corresponding to different parts of the touch pattern of the light-reflecting surface structure.

12. An organic light-emitting diode (OLED) display substrate, comprising:

a substrate and a plurality of organic light-emitting diode units, wherein an organic light-emitting diode unit comprises;

a first layer comprising an anode and a first electrode apart from the anode;

an organic light-emitting layer;

a cathode; and

a second electrode insulated from the cathode,

wherein;

the anode, the organic light-emitting layer, and the cathode are configured to form a pixel unit, and the anode and the cathode are configured to drive the organic light-emitting layer to emit light; and

the first electrode and the second electrode are configured to form a photodiode and to recognize touch patterns.