PRE-CHARGE METHOD FOR DISPLAY PANEL, DISPLAY PANEL, AND DISPLAY DEVICE

• US 20200135131A1
• Filed: 08/29/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Chongqing HKC Optoelectronics Technology Co., Ltd. (Shenzhen Huike Investment Holding Co., Ltd.), HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Original Assignee: Chongqing HKC Optoelectronics Technology Co., Ltd. (Shenzhen Huike Investment Holding Co., Ltd.), HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Inventors: HUANG, XIAOYU
• Granted Patent: US 10,885,864 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2310/0202 Addressing of scan or signal lines
• CPC Class Codes: G09G 2310/0243 Details of the generation of driving signals
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2330/028 Generation of voltages supplied to electrode drivers in a matrix display other than LCD
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

This application discloses a pre-charge method for a display panel, a display panel and a display device. The pre-charge method for the display panel includes steps of outputting a gate enabling signal; receiving an N^th gate enabling signal by an N^th scan line; and synchronously outputting the N^th gate enabling signal to a (N+1)^th scan line; N being a natural number more than or equal to 1.

Claims

1. A pre-charge method for a display panel, the display panel comprising a pre-charge circuit, the pre-charge circuit comprising a gate driving circuit and a first pre-charge circuit, the first pre-charge circuit comprising a first trigger switch circuit, the first trigger switch circuit comprising a first pre-charge switch, comprising steps of:

out putting a gate enabling signal by the gate driving circuit;

receiving an N^th gate enabling signal by the N^th scan line and charging the N^th line of pixels;

controlling the first pre-charge switch to be turned on by the first trigger switch circuit of the first pre-charge circuit according to the N^th gate enabling signal; and

synchronously outputting, by the first pre-charge switch, the N^th gate enabling signal received by the N^th scan line to the (N+1)^th scan line;

wherein

N is a natural number more than or equal to 1.

2. The pre-charge method for a display panel according to claim 1, wherein the first trigger switch circuit comprises a first trigger circuit and a first switch circuit;

the control end of the first trigger circuit is connected to the N^th scan line and the (N+1)^th scan line separately, the step of synchronously outputting, by the first pre-charge switch, the N^th gate enabling signal received by the N^th scan line to the (N+1)^th scan line comprises;

when the N^th scan line receives the N^th gate enabling signal, controlling the first switch circuit to output a control signal to the first pre-charge switch;

turning on the first pre-charge switch under the control of the control signal; and

synchronously outputting, by the first pre-charge switch, the N^th gate enabling signal to the (N+1)^th scan line;

after the step of synchronously outputting, the first pre-charge switch, the N^th gate enabling signal received by the N^th scan line to the (N+1)^th scan line, the method further comprises steps of;

when the (N+1)^th scan line receives the (N+1)^th gate enabling signal, controlling the first switch circuit to output a turnoff signal to the first pre-charge switch by the first trigger circuit; and

turning off the first pre-charge switch under the control of the turnoff signal.

3. A display panel, comprising a pre-charge circuit, the pre-charge circuit comprising:

a gate driving circuit configured to output a gate enabling signal;

a plurality of scan lines connected to the gate driving circuit respectively; and

a first pre-charge circuit connected to the N^th scan line and the (N+1)^th scan line;

wherein

N is a natural number more than or equal to 1;

the first pre-charge circuit comprising;

a first trigger switch circuit; and

a first pre-charge switch, having a control end connected to the output end of the first trigger switch circuit;

wherein

when the N^th scan line receives an N^th gate enabling signal, the first trigger switch circuit controls the first pre-charge switch to be turned on; and

the first pre-charge switch synchronously outputs the N^th gate enabling signal to the (N+1)^th scan line.

4. The display panel according to claim 3, wherein the first pre-charge circuit further comprises:

a first single guide circuit, having an input end connected to the N^th scan line, and an output end connected to the input end of the first trigger switch circuit; and

a second single guide circuit, having an input end connected to the (N+1)^th scan line, and an output end connected to the output end of the first single guide circuit and the input end of the first trigger switch circuit.

5. The display panel according to claim 4, wherein the first trigger switch circuit comprises a first trigger circuit and a first switch circuit;

the control end of the first trigger circuit is connected to the N^th scan line and the (N+1)^th scan line separately;

when the N^th scan line receives an N^th gate enabling signal, the first trigger circuit controls the first switch circuit to output a control signal to the first pre-charge switch, the first pre-charge switch is turned on under the control of the control signal, and the first pre-charge switch synchronously outputs the N^th gate enabling signal to the (N+1)^th scan line; and

when the (N+1)^th scan line receives an (N+1)^th gate enabling signal, the first trigger circuit controls the first switch circuit to output a turnoff signal to the first pre-charge switch, and the first pre-charge switch is turned off under the control of the turnoff signal.

6. The display panel according to claim 5, wherein the first trigger circuit comprises a first trigger;

the first switch circuit comprises a supply voltage, a first resistor, a first switch tube and a second switch tube;

the first pre-charge switch comprises a fifth switch tube;

the control end of the first switch tube is negatively conducted, and the control ends of the second switch, tube and the fifth switch tube are positively conducted;

the source of the fifth switch tube is connected to the N^th scan line, the drain is connected to the (N+1)^th scan line, and the gate is connected to an input pin of the first trigger and is grounded through the first resistor;

the source of the first switch tube is connected to the supply voltage, the drain is connected to the gate of the fifth switch tube, and the gate is connected to an output pin of the first trigger;

the source of the second switch tube is connected to the drain of the first switch tube, the drain is grounded, and the gate is connected to the output pin of the first trigger;

a control pin of the first trigger is connected to the N^th scan line and the (N+1)^th scan line separately, and when the control pin of the first trigger receives a rising edge signal, the first trigger assigns the logic level of the input pin to the output pin.

7. The display panel according to claim 6, wherein the first single guide circuit comprises a first diode and a fifth diode, a second single guide circuit comprises a second diode;

the fifth diode connected to the output end of the N^th scan line and the input end of the scanning line of the N^th, the fifth diode is to control the output of the gate enabling signal of the scanning line of the N^th;

the control end of the first switch tube is a negatively conducted triode, and the control ends of the second switch tube and the fifth switch tube are positively conducted triodes.

8. The display panel according to claim 3, wherein the pre-charge circuit further comprises:

a second pre-charge circuit corresponding to the first pre-charge circuit and connected to the (N+1)^th scan line and the (N+2)^th scan line;

the second pre-charge circuit comprises;

a second trigger switch circuit; and

a second pre-charge switch, having a control end connected to the output end of

the second trigger switch circuit;

wherein

when the (N+1)^th scan line receives an (N+1)^th gate enabling signal, the second trigger switch circuit controls the second pre-charge switch to be turned on; and

the second pre-charge switch synchronously outputs the (N+1)^th gate enabling signal to the (N+2)^th scan line.

9. The display panel according to claim 8, wherein the second pre-charge:

circuit further comprises;

a third diode, having an input end connected to the (N+1)^th scan line, and an output end connected to the input end of the second trigger switch circuit; and

a fourth diode, having an input end connected to the (N+2)^th scan line, and an output end connected to the output end of the third diode and the input end of the second trigger switch circuit;

a sixth diode the sixth diode connected to the output end of the (N+1)^th scan line and the input end of the scanning line of the (N+1)^th, the sixth diode is to control the output of the gate enabling signal of the scanning line of the (N+1)^th.

10. The display panel according to claim 9, wherein the second trigger switch circuit comprises a second trigger circuit and a second switch circuit;

the control end of the second trigger circuit is connected to the (N+1)^th scan line and the (N+2)^th scan line separately;

when the (N+1)^th scan line receives an (N+1)^th gate enabling signal, the second trigger circuit controls the second switch circuit to output a control signal to the second pre-charge switch, the second pre-charge switch is turned on under the control of the control signal, and the second pre-charge switch synchronously outputs the ( N+1)^th gate enabling signal to the (N+2)^th scan line; and

when the (N+2)^th scan line receives an (N+2)^th gate enabling signal, the second trigger circuit controls the second switch circuit to output a turnoff signal to the second pre-charge switch, and the second pre-charge switch is turned off under the control of the turnoff signal.

11. The display panel according to claim 10, wherein the second trigger circuit comprises a second trigger;

the second switch circuit comprises a supply voltage, a second resistor, a third switch tube and a fourth switch tube;

the second pre-charge switch comprises a sixth switch tube;

the control end of the third switch tube is negatively conducted, and the control ends of the fourth switch tube and the sixth switch tube are positively conducted;

the source of the sixth switch tube is connected to the (N+1)^th scan line, the drain is connected to the (N+2)^th scan line, and the gate is connected to an input pin of the second trigger and is grounded through the second resistor;

the source of the third switch tube is connected to the supply voltage, the drain is connected to the gate of the sixth switch tube, and the gate is connected to an output pin of the second trigger;

the source of the fourth switch tube is connected to the drain of the third switch tube, the drain is grounded, and the gate is connected to the output pin of the second trigger;

a control pin of the second trigger is connected to the (N+1)^th scan line and the N+2)^th scan line separately, and when the control pin of the second trigger receives a rising edge signal, the second trigger assigns the logic level of the input pin to the output pin.

12. The display panel according to claim 10, wherein the control end of the third switch tube is a negatively conducted triode, and die control ends of the fourth switch tube and the sixth switch tube are positively conducted triodes.

13. A display device, comprising a display panel, the display panel comprising a pre-charge circuit, the pre-charge circuit comprising:

a gate driving circuit configured to output a gate enabling signal;

a plurality of scan lines connected to the gate driving circuit respectively;

a first pre-charge circuit connected to the N^th scan line and the (N+1)^th scan line; and

a second pre-charge circuit corresponding to the first pre-charge circuit and connected to the (N+1)^th scan line and the (N+2)^th scan line;

wherein

N is a natural number more than or equal to 1;

the first pre-charge circuit comprising;

a first trigger switch circuit; and

a first pre-charge switch, having a control end connected to the output end of the;

first trigger switch circuit;

wherein

when the N^th scan line receives an N^th gate enabling signal, the first trigger switch circuit controls the first pre-charge switch to be turned on; and

the first pre-charge switch synchronously outputs the N^th gate enabling signal to the (N+1)^th scan line;

the second pre-charge circuit comprising;

a second trigger switch circuit; and

a second pre-charge switch, having a control end connected to the output end of the second trigger switch circuit;

wherein

when the (N+1)^th scan line receives an (N+1)^th gate enabling signal, the second trigger switch circuit controls the second pre-charge switch to be turned on; and

the second pre-charge switch synchronously outputs the (N+1)^th gate enabling signal to the (N+2)^th scan line.

14. The display device according to claim 13, wherein the first trigger switch circuit comprises a first trigger circuit and a first switch, circuit;

the control end of the first trigger circuit is connected to the N^th scan line and the (N+1)^th scan line separately;

when the N^th scan line receives an N^th gate enabling signal, the first trigger circuit controls the first switch circuit to output a control signal to the first pre-charge switch, the first pre-charge switch is turned on under the control of the control signal, and the first pre-charge switch synchronously outputs the N^th gate enabling signal to the (N+1)^th scan line;

wherein the second trigger switch circuit comprises a second trigger circuit and a second switch circuit;

the control end of the second trigger circuit is connected to the (N+1)^th scan line and the (N+2)^th scan line separately;

when the (N+1)^th scan line receives an (N+1)^th gate enabling signal, the second trigger circuit controls the second switch circuit to output a control signal to the second pre-charge switch, the second pre-charge switch is turned on under the control of the control signal, and the second pre-charge switch synchronously outputs the (N+1)^th gate enabling signal to the (N+2)^th scan line; and

when the (N+2)^th scan line receives an (N+2)^th gate enabling signal, the second trigger circuit controls the second switch circuit to output a turnoff signal to the second pre-charge switch, and the second pre-charge switch is turned off under the control of the turnoff signal.

15. The display device according to claim 14, wherein the first trigger circuit comprises a first trigger;

the first switch circuit comprises a supply voltage, a first resistor, a first switch tube and a second switch tube;

the first pre-charge switch comprises a fifth switch tube;

the control end of the first switch tube is negatively conducted, and the control ends of the second switch tube and the fifth switch tube are positively conducted;

the source of the fifth switch tube is connected to the N^th scan line, the drain is connected to the (N+1)^th scan line, and the gate is connected to an input pin of the first trigger and is grounded through the first resistor;

the source of the first switch tube is connected to the supply voltage, the drain is connected to the, gate of the fifth switch tube, and the gate is connected to an output pin of the first trigger;

the source of the second switch tube is connected to the drain of the first switch tube, the drain is grounded, and the gate is connected to the output pin of the first trigger;

a control pin of the first trigger is connected to the N^th scan line and the (N+1)^th scan line separately, and when the control pin of the first trigger receives a rising edge signal, the first trigger assigns the logic level of the input pin to the output pin;

wherein the second trigger circuit comprises a second trigger;

the second switch circuit comprises a supply voltage, a second resistor, a third switch tube and a fourth switch tube;

the second pre-charge switch comprises a sixth switch tube;

the control end of the third switch tube is negatively conducted, and the control ends of the fourth switch tube and the sixth switch tube are positively conducted;

the source of the sixth switch tube is connected to the (N+1)^th scan line, the drain is connected to the (N+2)^th scan line, and the gate is connected to an input pin of the second trigger and is grounded through the second resistor;

the source of the third switch tube is connected to the supply voltage, the drain is connected to the gate of the sixth switch tube, and the gate is connected to an output pin of the second trigger;

the source of the fourth switch tube is connected to the drain of the third switch tube, the drain is grounded, and the gate is connected to the output pin of the second trigger.

16. The display device according to claim 15, wherein the first pre-charge circuit further comprises:

a first diode, having an input end connected to the N^th scan line, and an output end connected to the control pin of the first trigger; and

a second diode, having an input end connected to the (N+1)^th scan line, and an output end connected to the output end of the first diode and the control pin of the first trigger.

a fifth diode connected to the output end of the N^th scan line and the input end of the scanning line of the N^th, the fifth diode is to control the output of the gate enabling signal of the scanning line of the N^th;

wherein the second pre-charge circuit further comprises;

a third diode, having an input end connected to the (N+1)^th scan line, and an output end connected to the input end of the second trigger switch circuit; and

a fourth diode, having an input end connected to the (N+2)^th scan line, and an output end connected to the output end of the third diode and the input end of the second trigger switch circuit;

the six diode connected to the output end of the (N+1)^th scan line and the input end of the scanning line of the (N+1)^th, the six diode is to control the output of the gate enabling signal of the scanning line of the (N+1)^th.

17. The display device according to claim 14, the display panel comprising multiple pre-charge circuit, the pre-charge circuit comprising a gate enabling signal switch, the gate enabling signal switch connected to the output end of the scan line and the input end of the scanning line, the gate enabling signal switch is to control the output of the gate enabling signal of the scanning line.

18. The display device according to claim 17, wherein the first switch circuit comprises a first reverser and a first resistance, the input of the first reverser connected to the output pin of the first trigger, the output of the first reverser connected to the control ends of the first pre-charge switch, the first resistance grounded at one end, and the other end connected the output of the first reverser and the control ends of the first pre-charge switch

the second switch circuit comprises a second reverser and a second resistance, the input of the second reverser connected to the output pin of the second trigger, the output of the second reverser connected to the control ends of the second pre-charge switch, the second resistance grounded at one end, and the other end connected the output of the second reverser and the control ends of the second pre-charge switch.

19. The display device according to claim 17, wherein the control end of the gate enabling signal switch is a negatively conducted.