Emission control driving circuit, emission control driver and organic light emitting display device

• US 10,643,533 B2
• Filed: 03/05/2019
• Issued: 05/05/2020
• Est. Priority Date: 01/19/2018
• Status: Active Grant

• Current Assignee: Kunshan Govisionox Optoelectronics Co., Ltd (Visionox Technology, Inc.)
• Original Assignee: Kunshan Govisionox Optoelectronics Co., Ltd (Visionox Technology, Inc.)
• Inventors: Wu, Jianlong, Huang, Xiuqi, Hu, Siming, Zhu, Hui
• Primary Examiner(s): Karimi, Pegeman
• Application Number:
  US16/293,486
• Publication Number:
  US 20190197956A1
• Time in Patent Office: 427 Days
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0281 Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: G11C 19/28 using semiconductor elements G11C19/14, G11C19/36 take precedence

Abstract

Embodiments of the present application provide a emission control driving circuit, a emission control driver and an organic light emitting display device. The emission control driving circuit includes a first gate voltage control circuit, a second gate voltage control circuit and an isolation circuit.

Claims

1. An emission control driving circuit, comprising:

a first gate voltage control circuit, generating a first gate-controlled voltage at a first gate voltage control node according to signals of a first input terminal, a second input terminal and a second power input terminal;

a second gate voltage control circuit, generating a third gate-controlled voltage at a third gate voltage control node according to the first gate-controlled voltage and the signals of the first input terminal, the second input terminal, a third input terminal, a first power input terminal and the second power input terminal; and

an isolation circuit connected to the second power input terminal, the first gate voltage control circuit and the second gate voltage control circuit;

wherein

when the first gate-controlled voltage is lower than a voltage value of the second power input terminal, the isolation circuit isolates the first gate voltage control node from the first gate voltage control circuit and/or the second gate voltage control circuit;

or

when the third gate-controlled voltage is lower than the voltage value of the second power input terminal, the isolation circuit isolates the third gate voltage control node from the first gate voltage control circuit and/or the second gate voltage control circuit.

2. The emission control driving circuit of claim 1, wherein the second gate voltage control circuit further generates a second gate-controlled voltage at a second gate voltage control node, and the emission control driving circuit further comprises:

an output circuit, generating an output signal at an output terminal according to the second gate-controlled voltage, the third gate-controlled voltage, and signals of the first power input terminal and the second power input terminal.

3. The emission control driving circuit of claim 2, wherein

when the first gate-controlled voltage is lower than the voltage value of the second power input terminal, the isolation circuit isolates the first gate voltage control node from the first gate voltage control circuit and the second gate voltage control circuit;

and

when the third gate-controlled voltage is lower than the voltage value of the second power input terminal, the isolation circuit isolates the third gate voltage control node from the second gate voltage control circuit.

4. The emission control driving circuit of claim 2, wherein

when the first gate-controlled voltage is lower than the voltage value of the second power input terminal, the isolation circuit isolates the first gate voltage control node from the first gate voltage control circuit;

and

when the third gate-controlled voltage is lower than the voltage value of the second power input terminal, the isolation circuit isolates the third gate voltage control node from the first gate voltage control circuit and the second gate voltage control circuit.

5. An emission control driver, comprising at least two emission control driving circuits of claim 2, wherein the at least two emission control driving circuits are connected sequentially, the first input terminal of the emission control driving circuit is connected to the output terminal of adjacent emission control driving circuit.

6. The emission control driver of claim 5, wherein the first input terminal of each emission control driving circuit receives a start signal or an output signal of the emission control driving circuit, the second input terminal of an odd emission control driving circuit receives a first clock signal, the third input terminal of the odd emission control driving circuit receives a second clock signal;

and the second input terminal of an even emission control driving circuit receives the second clock signal, the third input terminal of the even emission control driving circuit receives the first clock signal.

7. The emission control driver of claim 6, wherein the first clock signal and the second clock signal have same transmission periods, the first clock signal and the second clock signal have non-overlapping clock signals, when a second falling edge voltage of the first clock signal comes, the start signal changes to a rising edge voltage and maintains a high level voltage until a fourth falling edge voltage of the first clock signal comes.

8. An organic light emitting display device, comprising the emission control driver as claimed in claim 5.

9. The emission control driving circuit of claim 1, wherein the first gate voltage control circuit comprises a first transistor, a second transistor and a third transistor;

wherein

a gate of the first transistor is connected to the second input terminal, a source of the first transistor is connected to a gate of the second transistor, and a drain of the first transistor is connected to the first input terminal;

a source of the second transistor is connected to the second input terminal, a drain of the second transistor is connected to a source of the third transistor, and the gate of the second transistor is further connected to the second gate voltage control circuit; and

a gate of the third transistor is connected to the second input terminal, a drain of the third transistor is connected to the second power input terminal, and a source of the third transistor is further connected to the second gate voltage control circuit.

10. The emission control driving circuit of claim 9, wherein the first transistor, the second transistor and the third transistor are P-type thin film transistors.

11. The emission control driving circuit of claim 9, wherein the second gate voltage control circuit comprises a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor and a first capacitor;

wherein

a gate of the fourth transistor is connected to the third input terminal, a source of the fourth transistor is connected to a source of the fifth transistor, and a drain of the fourth transistor is connected to the gate of the second transistor;

a gate of the fifth transistor is connected to the source of the third transistor, and a drain of the fifth transistor is connected to the first power input terminal;

a gate of the sixth transistor is connected to the source of the third transistor, a source of the sixth transistor is connected to a source of the seventh transistor, and a drain of the sixth transistor is connected to the third input terminal;

a gate of the seventh transistor is connected to the third input terminal, and a drain of the seventh transistor is connected to a source of the eighth transistor;

a gate of the eighth transistor is connected to the first input terminal and the output circuit, a drain of the eighth transistor is connected to the first power input terminal, and the source of the eighth transistor is further connected to the output circuit; and

one end of the first capacitor is connected to the gate of the sixth transistor, and the other end is connected to the source of the sixth transistor.

12. The emission control driving circuit of claim 11, wherein the fourth transistor, the fifth transistor, the sixth transistor, the seventh transistor and the eighth transistor are P-type thin film transistors.

13. The emission control driving circuit of claim 11, wherein the output circuit comprises a ninth transistor, a tenth transistor, a second capacitor and a third capacitor;

wherein

a gate of the ninth transistor is connected to the source of the eighth transistor, a source of the ninth transistor is connected to the first power input terminal, and a drain of the ninth transistor is connected to a source of the tenth transistor;

a gate of the tenth transistor is connected to the gate of the eighth transistor, and a drain of the tenth transistor is connected to the second power input terminal;

one end of the second capacitor is connected to the gate of the ninth transistor, and the other end is connected to the source of the ninth transistor;

one end of the third capacitor is connected to the gate of the tenth transistor, and the other end is connected to the third input terminal; and

an output signal generated by the output circuit is output from the source of the tenth transistor.

14. The emission control driving circuit of claim 13, wherein the ninth transistor and the tenth transistor are P-type thin film transistors.

15. The emission control driving circuit of claim 13, wherein the isolation circuit comprises an eleventh transistor, a twelfth transistor and a thirteenth transistor;

wherein

the eleventh transistor is connected between the source of the third transistor and the gate of the sixth transistor, a gate of the eleventh transistor is connected to the second power input terminal, a source of the eleventh transistor is connected to the source of the third transistor, and a drain of the eleventh transistor is connected to the gate of the sixth transistor;

the twelfth transistor is connected between the gate of the fifth transistor and the gate of the sixth transistor, a gate of the twelfth transistor is connected to the second power input terminal, a drain of the twelfth transistor is connected to the gate of the fifth transistor, and a source of the twelfth transistor is connected to the gate of the sixth transistor; and

the thirteenth transistor is connected between the gate of the eighth transistor and the gate of the tenth transistor, a gate of the thirteenth transistor is connected to the second power input terminal, a drain of the thirteenth transistor is connected to the gate of the tenth transistor, and a source of the thirteenth transistor is connected to the gate of the eighth transistor.

16. The emission control driving circuit of claim 15, wherein the eleventh transistor, the twelfth transistor and the thirteenth transistor are P-type thin film transistors.

17. The emission control driving circuit of claim 15, wherein the first gate-controlled voltage is input to the gate of the sixth transistor, the second gate-controlled voltage is input to the gate of the ninth transistor;

and the third gate-controlled voltage is input to the gate of the tenth transistor.

18. The emission control driving circuit of claim 13, wherein the isolation circuit comprises a fourteenth transistor, a sixteenth transistor and a fifteenth transistor;

wherein

the fourteenth transistor is connected between the gate of the second transistor and the gate of the tenth transistor, a gate of the fourteenth transistor is connected to the second power input terminal, a source of fourteenth transistor is connected to the gate of the second transistor, and a drain of the fourteenth transistor is connected to the gate of the tenth transistor;

the sixteenth transistor is connected between the gate of the fifth transistor and the gate of the sixth transistor, a gate of the sixteenth transistor is connected to the second power input terminal, the a drain of the sixteenth transistor is connected to the gate of the fifth transistor, and a source of the sixteenth transistor is connected to the gate of the sixth transistor; and

the fifteenth transistor is connected between the gate of the eighth transistor and the gate of the tenth transistor, a gate of the fifteenth transistor is connected to the second power input terminal, a drain of the fifteenth transistor is connected to the gate of the tenth transistor and the drain of the fourteenth transistor, and a source of the fifteenth transistor is connected to the gate of the eighth transistor.

19. The emission control driving circuit of claim 18, wherein the fourteenth transistor, the sixteenth transistor and the fifteenth transistor are P-type thin film transistors.

20. The emission control driving circuit of claim 1, wherein the first gate voltage control circuit includes at least one transistor, one of the at least one transistor connects the first gate-controlled voltage or the third gate-controlled voltage;

the second gate voltage control circuit includes at least two transistors, one of the at least two transistors connects the first gate-controlled voltage, another one of the at least two transistors connects the third gate-controlled voltage.