CIRCUIT STRUCTURE, DISPLAY DEVICE AND DRIVING METHOD

• US 20180247596A1
• Filed: 03/29/2017
• Published: 08/30/2018
• Est. Priority Date: 08/19/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: ZHAO, Hui, LIU, Libin, HU, Lei, TAN, Wenjing
• Granted Patent: US 10,127,864 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2310/0248 Precharge or discharge of column electrodes before or after applying exact column voltages
• CPC Class Codes: G09G 2310/0289 Details of voltage level shifters arranged for use in a driving circuit
• CPC Class Codes: G09G 2320/0204 Compensation of DC component across the pixels in flat panels
• CPC Class Codes: G09G 2330/026 Arrangements or methods related to booting a display
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: G09G 3/3291 in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence
• CPC Class Codes: H05K 2201/1003 Non-printed inductor

Abstract

A circuit structure includes: a control circuit, including a first end, a second end and a control end; a switching circuit, including a first interface, a second interface and a control interface; a driving power line, connected with the control end of the control circuit and configured to provide a driving power voltage in a working stage to conduct the first end of the control circuit and the second end of the control circuit; and a first voltage line, connected with the first end of the control circuit and configured to, when the first end of the control circuit and the second end of the control circuit are conducted, provide a first voltage to the control interface of the switching circuit through the control circuit to disconnect the first interface of the switching circuit from the second interface of the switching circuit.

Claims

1. A circuit structure, comprising:

a control circuit, including a first end, a second end and a control end;

a switching circuit, including a first interface, a second interface and a control interface, wherein the control interface of the switching circuit is connected with the second end of the control circuit, and the second interface of the switching circuit is grounded;

a data-line group, connected with the first interface of the switching circuit;

a driving power line, connected with the control end of the control circuit and configured to provide a driving power voltage in a working stage to conduct the first end of the control circuit and the second end of the control circuit; and

a first voltage line, connected with the first end of the control circuit and configured to, when the first end of the control circuit and the second end of the control circuit are conducted, provide a first voltage to the control interface of the switching circuit through the control circuit to disconnect the first interface of the switching circuit from the second interface of the switching circuit.

2. The circuit structure according to claim 1, wherein the data-line group is further connected with a pixel circuit in a display panel, and the driving power voltage is further configured to drive an organic light emitting diode in the pixel circuit of the display panel to emit light in the working stage.

3. The circuit structure according to claim 1, further comprising a first resistor, wherein the second interface of the switching circuit is connected with a first end of the first resistor, and a second end of the first resistor is grounded, so that the switching circuit is grounded through the first resistor.

4. The circuit structure according to claim 1, further comprising a second resistor, wherein a first end of the second resistor is simultaneously connected with the control interface of the switching circuit and the second end of the control circuit, and a second end of the second resistor is grounded.

5. The circuit structure according to claim 1, further comprising a diode, wherein a first end of the diode is connected with the control end of the control circuit, and a second end of the diode is connected with the driving power line, so that the driving power line is connected with the control end of the control circuit through the diode.

6. The circuit structure according to claim 1, wherein:

the switching circuit includes a first transistor, and the first interface, the second interface and the control interface of the switching circuit respectively include a first electrode, a second electrode and a gate electrode of the first transistor;

the control circuit includes a control transistor, and the first end, the second end and the control end of the control circuit respectively include a first electrode, a second electrode and a gate electrode of the control transistor;

the data-line group includes a first data line;

the first electrode of the first transistor is connected with the first data line, the gate electrode of the first transistor is connected with the second electrode of the control transistor, and the second electrode of the first transistor is grounded; and

the first electrode of the control transistor is connected with the first voltage line, and the gate electrode of the control transistor is connected with the driving power line.

7. The circuit structure according to claim 1, wherein:

the switching circuit includes a first transistor, a second transistor and a third transistor, the first interface of the switching circuit includes a first electrode of the first transistor, a first electrode of the second transistor and a first electrode of the third transistor, the second interface of the switching circuit includes a second electrode of the first transistor, a second electrode of the second transistor and a second electrode of the third transistor, and the control interface of the switching circuit includes a gate electrode of the first transistor, a gate electrode of the second transistor and a gate electrode of the third transistor;

the control circuit includes a control transistor, and the first end, the second end and the control end of the control circuit respectively include a first electrode, a second electrode and a gate electrode of the control transistor;

the data-line group includes a first data line, a second data line and a third data line;

the first electrode of the first transistor is connected with the first data line, the gate electrode of the first transistor is connected with the second electrode of the control transistor, and the second electrode of the first transistor is grounded;

the first electrode of the second transistor is connected with the second data line, the gate electrode of the second transistor is connected with the second electrode of the control transistor, and the second electrode of the second transistor is grounded;

the first electrode of the third transistor is connected with the third data line, the gate electrode of the third transistor is connected with the second electrode of the control transistor, and the second electrode of the third transistor is grounded; and

the first electrode of the control transistor is connected with the first voltage line, and the gate electrode of the control transistor is connected with the driving power line.

8. The circuit structure according to claim 7, wherein the first transistor, the second transistor, the third transistor and the control transistor are thin film transistors.

9. The circuit structure according to claim 8, wherein the first transistor, the second transistor and the third transistor are P-type transistors, and the control transistor is an N-type transistor.

10. The circuit structure according to claim 7, further comprising a first resistor, a first test pad, a second test pad and a third test pad, wherein:

the first test pad is connected with the second electrode of the first transistor and a first end of the first resistor;

the second test pad is connected with the second electrode of the second transistor and the first end of the first resistor;

the third test pad is connected with the second electrode of the third transistor and the first end of the first resistor; and

a second end of the first resistor is grounded.

11. The circuit structure according to claim 7, further comprising a third resistor, a fourth resistor, a fifth resistor, a first test pad, a second test pad and a third test pad, wherein:

the first test pad is connected with the second electrode of the first transistor and a first end of the third resistor;

the second test pad is connected with the second electrode of the second transistor and a first end of the fourth resistor;

the third test pad is connected with the second electrode of the third transistor and a first end of the fifth resistor; and

a second end of the third resistor, a second end of the fourth resistor and a second end of the fifth resistor are grounded.

12. The circuit structure according to claim 7, further comprising:

a first pin, a second pin, a third pin, a fourth pin, a fifth pin connected with the first pin, a sixth pin connected with the second pin, a seventh pin connected with the third pin, and an eighth pin connected with the fourth pin, wherein;

the first pin is connected with the second electrode of the first transistor;

the second pin is connected with the second electrode of the second transistor;

the third pin is connected with the second electrode of the third transistor;

the fourth pin is connected with the gate electrode of the first transistor, the gate electrode of the second transistor and the gate electrode of the third transistor;

the fifth pin, the sixth pin and the seventh pin are grounded; and

the eighth pin is connected with the second electrode of the control transistor.

13. A display device, comprising the circuit structure according to claim 1.

14. The display device according to claim 13, comprising a display panel and a circuit board, wherein the circuit structure is arranged on the display panel or the circuit board.

15. The display device according to claim 13, comprising a display panel and a circuit board, wherein a first portion of the circuit structure is arranged on the display panel, a second portion of the circuit structure is arranged on the circuit board, the first portion of the circuit structure includes the switching circuit and the data-line group, and the second portion of the circuit structure includes the control circuit.

16. The display device according to claim 15, wherein the first portion of the circuit structure and the second portion of the circuit structure are connected through a plurality of pins arranged in a bonding region.

17. The display device according to claim 13, wherein:

the display panel includes a driving circuit, the driving circuit is configured to provide a first voltage to the first voltage line; and

the circuit board includes a direct current transformer, and the direct current transformer is respectively connected with the driving circuit and the driving power line and is configured to provide the driving power voltage to the driving power line.

19. A method for driving the circuit structure according to claim 1, comprising:

in an initial stage, conducting the first interface of the switching circuit and the second interface of the switching circuit, so that the data-line group is grounded through the switching circuit; and

in a working stage, disconnecting the first interface of the switching circuit from the second interface of the switching circuit.

20. The method according to claim 19, wherein:

in the initial stage, conducting the first interface of the switching circuit and the second interface of the switching circuit includes;

disconnecting the first end of the control circuit from the second end of the control circuit to control a voltage applied to the control interface of the switching circuit to be a switch opening voltage, wherein under control of the switch opening voltage, the first interface of the switching circuit and the second interface of the switching circuit are conducted, so that the data-line group is grounded through the switching circuit; and

in the working stage, disconnecting the first interface of the switching circuit from the second interface of the switching circuit includes;

conducting the first end of the control circuit and the second end of the control circuit so as to provide a first voltage to the control interface of the switching circuit, wherein under control of the first voltage, the switching circuit disconnects the first interface of the switching circuit from the second interface of the switching circuit.

21. The method according to claim 20, wherein:

in the initial stage, disconnecting the first end of the control circuit from the second end of the control circuit includes;

providing a closing voltage to the control end of the control circuit so as to disconnect the first end of the control circuit from the second end of the control circuit; and

in the working stage, conducting the first end of the control circuit and the second end of the control circuit includes;

providing a driving power voltage to the control end of the control circuit so as to conduct the first end of the control circuit and the second end of the control circuit.

18. (canceled)