CN220155161U

CN220155161U - Display device

Info

Publication number: CN220155161U
Application number: CN202321315293.3U
Authority: CN
Inventors: 钟焜源; 陈维祐
Original assignee: Giantplus Technology Co Ltd
Current assignee: Giantplus Technology Co Ltd
Priority date: 2023-04-12
Filing date: 2023-05-26
Publication date: 2023-12-08
Anticipated expiration: 2033-05-26

Abstract

The utility model provides a display device. The display device comprises a display panel, a first discharge control switch, a second discharge control switch and a discharge control circuit. The display panel comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixel circuits. The pixel circuits are correspondingly coupled with the scanning lines and the data lines. The first end of the first discharge control switch is coupled with the plurality of scanning lines. The first end of the second discharging control switch is coupled with the plurality of data lines. The discharge control circuit is coupled to the second end of the first discharge control switch, the control end of the first discharge control switch, the second end of the second discharge control switch and the control end of the second discharge control switch. When at least one of the operation voltage and the reset voltage of the display device is abnormal, the discharge control circuit is provided with a discharge operation for discharging the data voltages of the plurality of pixel circuits through the first discharge control switch and the second discharge control switch.

Description

Display device

Technical Field

The present utility model relates to a display technology, and more particularly, to a display device capable of performing a discharge operation of a pixel circuit when an abnormal power failure occurs in the display device.

Background

When the display device is not powered off by the normal power-off process, the pixel circuits on the display panel, such as a liquid crystal display panel (Liquid Crystal Display, LCD), have a problem of residual charges, which may cause a phenomenon of panel residual shadows or polarization of liquid crystals. Specifically, when the display device is not powered off by the normal shutdown procedure, the scan lines on the display panel in the display device are still at the low voltage level. Accordingly, the thin film transistor (Thin Film Transistor, TFT) in the pixel circuit is still in an off state, so that the discharge behavior of the pixel circuit is very slow. In this way, charges remain in the pixel circuit for a long time, and thus, the display panel is subjected to such phenomena as image sticking and liquid crystal polarization.

Disclosure of Invention

The utility model provides a display device, which can execute the discharge operation of a pixel circuit when the display device is abnormally powered off.

The display device comprises a display panel, a first discharge control switch, a second discharge control switch and a discharge control circuit. The display panel comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixel circuits. The pixel circuits are correspondingly coupled with the scanning lines and the data lines. The first end of the first discharge control switch is coupled with the plurality of scanning lines. The first end of the second discharging control switch is coupled with the plurality of data lines. The discharge control circuit is coupled to the second end of the first discharge control switch, the control end of the first discharge control switch, the second end of the second discharge control switch and the control end of the second discharge control switch. When at least one of the operation voltage and the reset voltage of the display device is abnormal, the discharge control circuit is provided with a discharge operation for discharging the data voltages of the plurality of pixel circuits through the first discharge control switch and the second discharge control switch.

In an embodiment of the present utility model, when at least one of the working voltage and the reset voltage is abnormal, the discharge control circuit turns on the first discharge control switch and the second discharge control switch.

In an embodiment of the utility model, the discharge control circuit connects the second terminal of the first discharge control switch to the reference high voltage when at least one of the operation voltage and the reset voltage is abnormal.

In an embodiment of the present utility model, the first discharge control switch connects the plurality of scan lines to the reference high voltage when at least one of the operation voltage and the reset voltage is abnormal.

In an embodiment of the utility model, the discharge control circuit connects the second terminal of the second discharge control switch to the reference low voltage when at least one of the operation voltage and the reset voltage is abnormal.

In an embodiment of the utility model, when at least one of the working voltage and the reset voltage is abnormal, the second discharge control switch connects the plurality of data lines and the common electrode of the display panel to the reference low voltage.

In an embodiment of the utility model, when at least one of the working voltage and the reset voltage is abnormal, a voltage value of at least one of the working voltage and the reset voltage is lower than a voltage value of the threshold voltage.

In an embodiment of the present utility model, the discharge control circuit further includes a sensor, a logic circuit, a first discharge control switch control circuit, and a second discharge control switch control circuit. The logic circuit is coupled to the sensor. The first discharge control switch control circuit is coupled to the logic circuit, the second end of the first discharge control switch and the control end of the first discharge control switch. The second discharge control switch control circuit is coupled to the logic circuit, the second end of the second discharge control switch and the control end of the second discharge control switch. The sensor is configured to measure at least one of an operating voltage and a reset voltage to generate a sensing signal. The logic circuit is configured to generate a first discharge control switch control signal and a second discharge control switch control signal according to the sensing signal.

In an embodiment of the utility model, the sensor provides the sensing signal with the first voltage level when it is determined that the voltage value of at least one of the operation voltage and the reset voltage is lower than the voltage value of the threshold voltage.

In an embodiment of the utility model, the logic circuit provides the first discharge control switch control signal and the second discharge control switch control signal according to the sensing signal having the first voltage level. The first discharge control switch control circuit is used for responding to the first discharge control switch control signal to conduct the first discharge control switch and connecting the second end of the first discharge control switch to the reference high voltage, and the second discharge control switch control circuit is used for responding to the second discharge control switch control signal to conduct the second discharge control switch and connecting the second end of the second discharge control switch to the reference low voltage.

Based on the above, the display device may turn on the switch to discharge the data voltages at the plurality of pixel circuits through the discharge control circuit when at least one of the operation voltage and the reset voltage of the display device is abnormal. Thus, problems such as image retention or liquid crystal polarization of the display panel can be reduced.

In order to make the above features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic diagram of a display device according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of a discharge control circuit and a discharge control switch according to an embodiment of the utility model.

FIG. 3A is a discharge clock diagram showing abnormal operating voltage according to an embodiment of the utility model.

FIG. 3B is a diagram illustrating a discharge clock with abnormal reset voltage according to an embodiment of the utility model.

Fig. 4 is a flowchart illustrating a discharging method of a display device according to an embodiment of the utility model.

Description of the reference numerals

10: display device

100: display panel

110-1, 110-2, 110-3, 110-4: scanning line

120-1, 120-2, 120-3, 120-4: data line

130: pixel circuit

200: discharge control circuit

210: sensor for detecting a position of a body

220: logic circuit

230. 240: switch control circuit

CP: comparator with a comparator circuit

R1 and R2: resistor

S1, S2: discharge control switch

S3, S4, S5, S6, S7: switch

S410, S420, S430, S440: step (a)

SEN: sensing signal

t0, t1, t2, t3, t4, t5: time point

Vcom: common electrode

VH: reference high voltage

VL: reference low voltage

Vd, vn, vs: voltage (V)

Vdata: data voltage

VDD: operating voltage

VR: reset voltage

Vth: threshold voltage

Detailed Description

Some embodiments of the utility model will be described in detail below with reference to the drawings, wherein reference numerals refer to the like or similar elements throughout the several views. These examples are only a part of the utility model and do not disclose all possible embodiments of the utility model. Rather, these embodiments are merely examples of the utility model in the claims.

Referring to fig. 1, fig. 1 is a schematic diagram of a display device according to an embodiment of the utility model. The display device 10 is, for example, a liquid crystal display (liquid crystal display, LCD), a Light-Emitting Diode (LED), an Organic Light-Emitting Diode (OLED), or the like, which provides a display function. In the present embodiment, the display device 10 includes a display panel 100, discharge control switches S1, S2, and a discharge control circuit 200. The display panel 100 includes scan lines 110-1 to 110-m, data lines 120-1 to 120-n, and pixel circuits 130. The number of the scan lines and the number of the data lines can be set according to the actual design requirement, and the utility model is not limited by the number of the scan lines and the number of the data lines in the embodiment. The pixel circuits 130 are coupled to the corresponding scan lines and the corresponding data lines, respectively. In the present embodiment, the first end of the discharge control switch S1 is coupled to the scan lines 110-1 to 110-m. The first end of the discharge control switch S2 is coupled to the data lines 120-1 to 120-n. The discharge control circuit 200 is coupled to the second terminal of the discharge control switch S1, the control terminal of the discharge control switch S1, the second terminal of the discharge control switch S2, and the control terminal of the discharge control switch S2.

In the present embodiment, the discharge control circuit 200 detects at least one of the operating voltage VDD and the reset voltage VR. For example, when at least one of the operating voltage VDD and the reset voltage VR is abnormal, the abnormal operating voltage VDD and/or the voltage value of the reset voltage VR is lower than the voltage value of the threshold voltage. In other words, when the operating voltage VDD or/and the reset voltage VR of the display device 10 is lower than the voltage value of the threshold voltage, the discharge control circuit 200 determines that the display device 10 has an abnormal power failure event. Accordingly, the discharge control circuit 200 performs a discharge operation on the pixel circuit 130. When the voltage values of the operating voltage VDD and the reset voltage VR of the display device 10 are both higher than or equal to the voltage value of the threshold voltage, the discharge control circuit 200 determines that the display device 10 does not have an abnormal power-off event.

When at least one of the operation voltage VDD and the reset voltage VR of the display device 10 is abnormal, the discharge control circuit 200 is provided with a discharge operation for discharging the data voltage of the pixel circuit 130 through the discharge control switches S1 and S2. Specifically, when at least one of the operating voltage VDD and the reset voltage VR is abnormal, the discharge control circuit 200 turns on the discharge control switches S1, S2. The discharge control circuit 200 connects the second terminal of the discharge control switch S1 to the reference high voltage VH, for example, and turns on the discharge control switch S1. The scan lines 110-1 to 110-m are connected to a reference high voltage VH. Accordingly, all of the pixel circuits 130 are selected. The discharge control circuit 200 connects the second terminal of the discharge control switch S2 to the reference low voltage VL, and turns on the discharge control switch S1. Accordingly, the discharge control switch S2 discharges all the data voltages located in the pixel circuit 130 using the reference low voltage VL. When at least one of the operating voltage VDD and the reset voltage VR of the display device 10 is abnormal, the data voltage may be a residual voltage including the pixel circuit 130 that is not normally discharged.

In this way, when the display panel 100 is abnormally powered off (i.e., at least one of the operating voltage VDD and the reset voltage VR is abnormal), the discharge control circuit 200 performs a discharge operation on all the pixel circuits 130 to reduce the image retention or the liquid crystal polarization of the display panel 100.

On the other hand, when neither the operating voltage VDD nor the reset voltage VR is abnormal, the discharge control circuit 200 turns off the discharge control switches S1, S2.

In the present embodiment, the display panel 100 further includes a common electrode Vcom corresponding to the pixel circuit 130. The common electrode Vcom is coupled to a first end of the discharge control switch S2. Therefore, when at least one of the operating voltage VDD and the reset voltage VR is abnormal, the discharge control switch S2, which is turned on, connects the common electrode Vcom to the reference low voltage VL. The voltage at the common electrode Vcom is substantially equal to the data voltage at the pixel circuit 130. In this way, image sticking generated based on the voltage difference between the voltage of the common electrode Vcom and the data voltage can be eliminated.

In some embodiments, the discharge control switches S1, S2 and the display panel 100 may be disposed on the same substrate. In some embodiments, the discharge control switches S1, S2 and the discharge control circuit 200 may be disposed on the same substrate. In some embodiments, the discharge control switches S1 and S2, the discharge control circuit 200, and the display panel 100 may be disposed on the same substrate.

Fig. 2 is a schematic diagram of a discharge control circuit and a discharge control switch according to an embodiment of the utility model. Please refer to fig. 1 and fig. 2 at the same time. In the present embodiment, the discharge control circuit 200 of the display device 10 includes a sensor 210, a logic circuit 220, and switch control circuits 230, 240. The switch control circuit 230 includes switches S3, S4, S5. The switch control circuit 240 includes switches S6, S7. Logic 220 is coupled to sensor 210. The switch control circuit 230 is coupled to the logic circuit 220, the second terminal of the discharge control switch S1, and the control terminal of the discharge control switch S1. The switch control circuit 240 is coupled to the logic circuit 220, the second terminal of the discharge control switch S2, and the control terminal of the discharge control switch S2.

In the present embodiment, the first terminal of the switch S3 is coupled to the control terminal of the discharge control switch S1. The second terminal of the switch S3 is coupled to the reference high voltage VH. The control terminal of the switch S3 is coupled to the logic circuit 220. The first terminal of the switch S4 is coupled to the control terminal of the discharge control switch S1. The second terminal of the switch S4 is coupled to the reference low voltage VL. The control terminal of the switch S4 is coupled to the logic circuit 220. The first terminal of the switch S5 is coupled to the second terminal of the discharge control switch S1. The second terminal of the switch S5 is coupled to the reference high voltage VH. The control terminal of the switch S5 is coupled to the logic circuit 220.

In the present embodiment, the first terminal of the switch S6 is coupled to the control terminal of the discharge control switch S2. The second terminal of the switch S6 is coupled to the reference high voltage VH. The control terminal of the switch S6 is coupled to the logic circuit 220. The first terminal of the switch S7 is coupled to the second terminal of the discharge control switch S2. The second terminal of the switch S7 is coupled to the reference low voltage VL. The control terminal of the switch S7 is coupled to the logic circuit 220.

In the present embodiment, the sensor 210 measures at least one of the operating voltage VDD and the reset voltage VR to generate the sensing signal SEN. Specifically, when the sensor 210 determines that the voltage value of at least one of the operating voltage VDD and the reset voltage VR is lower than the voltage value of the threshold voltage Vth, the sensor 210 provides the sensing signal SEN having the first voltage level to the logic circuit 220 to inform the logic circuit 220 that the current display device 10 is experiencing abnormal power-off. Conversely, when the operating voltage VDD and the reset voltage VR are not abnormal, the sensor 210 provides the sensing signal SEN with the second voltage level to the logic circuit 220. For example, the resistors R1, R2 and the comparator CP are included in the sensor 210. The comparator CP may be implemented by an operational amplifier (Operational Amplifier, OPA). The comparator CP has a first input, a second input and an output. The first terminal of the resistor R1 receives one of the operating voltage VDD and the reset voltage VR. The second terminal of the resistor R1 is coupled to the first input terminal of the comparator CP. The first terminal of the resistor R2 is coupled to the first input terminal of the comparator CP. The second terminal of the resistor R2 is coupled to a system low voltage, such as ground. The first input terminal of the comparator CP receives a divided value of at least one of the operating voltage VDD and the reset voltage VR. A second input of the comparator CP receives a threshold voltage Vth. In the present embodiment, when the divided voltage value is lower than the voltage value of the threshold voltage Vth, the comparator CP outputs the sensing signal SEN having the low voltage level (i.e., the first voltage level) to the logic circuit 220 through the output terminal; conversely, when the divided voltage value is higher than or equal to the voltage value of the threshold voltage Vth, the comparator CP outputs the sensing signal SEN having the high voltage level (i.e., the second voltage level) to the logic circuit 220 through the output terminal.

The logic circuit 220 generates the switch control signals CON1, CON2 according to the sense signal SEN. The logic circuit 220 provides a switch control signal CON1 to the switch control circuit 230 and a switch control signal CON2 to the switch control circuit 240. Specifically, when neither the operating voltage VDD nor the reset voltage VR is abnormal, the logic circuit 220 provides the switch control signals CON1 and CON2 according to the sensing signal SEN having the second voltage level. The switch control circuit 230 turns on the switch S4 and turns off the switches S3 and S5 in response to the switch control signal CON 1. In addition, the switch control circuit 240 turns off the switches S6, S7 in response to the switch control signal CON2. Accordingly, the discharge control switches S1, S2 are turned off.

In contrast, when at least one of the operating voltage VDD and the reset voltage VR is abnormal, the logic circuit 220 provides the switch control signals CON1 and CON2 according to the sensing signal SEN having the first voltage level. The switch control circuit 230 is responsive to the switch control signal CON1 to turn on the discharge control switch S1 and connects the second terminal of the discharge control switch S1 to the reference high voltage VH. Specifically, the switch control circuit 230 turns on the switches S3 and S5 and turns off the switch S4 in response to the switch control signal CON1 to connect the second terminal of the discharge control switch S1 to the reference high voltage VH. The discharge control switch S1 connects the scan lines 110-1 to 110-m to the reference high voltage VH. Accordingly, all of the pixel circuits 130 are selected. The switch control circuit 240 turns on the discharge control switch S2 in response to the switch control signal CON2, and connects the second terminal of the discharge control switch S2 to the reference low voltage VL. Specifically, the switch control circuit 240 turns on the switches S6 and S7 in response to the switch control signal CON2 to connect the second terminal of the discharge control switch S2 to the reference low voltage VL. The discharge control switch S2 connects the data lines 120-1 to 120-n and the common electrode Vcom of the display panel 100 to the reference low voltage VL. Accordingly, the data voltages of all the pixel circuits 130 are discharged.

In this way, when the sensor 210 determines that the display panel 100 is abnormally powered off (i.e., the voltage value of at least one of the operating voltage VDD and the reset voltage VR is lower than the voltage value of the threshold voltage Vth), the switch control circuits 230 and 240 respectively turn on the discharge control switches S1 and S2 to perform the discharge operation on all the pixel circuits 130, so as to reduce the problems of image retention or liquid crystal polarization of the display panel 100.

In some embodiments, in the sensor 210, the resistors R1, R2 may be omitted. Accordingly, the first input terminal of the comparator CP receives at least one of the operating voltage VDD and the reset voltage VR. A second input of the comparator CP receives a threshold voltage Vth. In the present embodiment, when at least one of the working voltage VDD and the reset voltage VR is lower than the voltage value of the threshold voltage Vth, the comparator CP outputs the sensing signal SEN having a low voltage level (i.e., the first voltage level) to the logic circuit 220; conversely, when the voltage value at the first input terminal is higher than or equal to the voltage value of the threshold voltage Vth, the comparator CP outputs the sense signal SEN having the high voltage level (i.e., the second voltage level) to the logic circuit 220.

In the present embodiment, the discharge control switches S1, S2 and the switches S3 to S7 may be implemented by at least one transistor or transmission gate (transmission gate), respectively. In this embodiment, the logic circuit 220 is, for example, a central processing unit (Central Processing Unit, CPU), or other programmable general purpose or special purpose Microprocessor (Microprocessor), digital signal processor (Digital Signal Processor, DSP), programmable controller, application specific integrated circuit (Application Specific Integrated Circuits, ASIC), programmable logic device (Programmable Logic Device, PLD), or other similar device or combination of devices, which can load and execute a computer program.

FIG. 3A is a discharge clock diagram showing abnormal operating voltage according to an embodiment of the utility model. Please refer to fig. 1 and fig. 3A simultaneously. First, at a time point t0, the discharge control circuit 200 determines that the voltage value of the operating voltage VDD is lower than the voltage value of the threshold voltage Vth. The operating voltage VDD is judged to be abnormal. Accordingly, the discharge control circuit 200 turns on the discharge control switches S1, S2. The discharge control circuit 200 connects the second terminal of the discharge control switch S1 to the reference high voltage VH and connects the second terminal of the discharge control switch S2 to the reference low voltage VL. At time point t1, the discharge control switch S1 charges the voltages Vs of the scan lines 110-1 to 110-m to the reference high voltage VH, and the discharge control switch S2 discharges the voltages Vd of the data lines 120-1 to 120-n and the voltage Vn of the common electrode Vcom of the display panel 100 to the reference low voltage VL. All of the pixel circuits 130 are selected, which causes all of the data voltages Vdata located at the pixel circuits 130 to be discharged. At time t2, all the data voltages Vdata located in the pixel circuit 130 are discharged to the reference low voltage VL. It is noted that the data voltage Vdata includes a residual voltage that is not normally discharged when the display device 10 is abnormally powered off. In addition, in one embodiment, the time difference between time t0, time t1, and time t2 is negligible.

FIG. 3B is a diagram illustrating a discharge clock with abnormal reset voltage according to an embodiment of the utility model. Please refer to fig. 1 and fig. 3B simultaneously. First, at a time point t3, the discharge control circuit 200 determines that the voltage value of the reset voltage VR is lower than the voltage value of the threshold voltage Vth. The reset voltage VR is judged to be abnormal. Accordingly, the discharge control circuit 200 turns on the discharge control switches S1, S2. The discharge control circuit 200 connects the second terminal of the discharge control switch S1 to the reference high voltage VH, and connects the second terminal of the discharge control switch S2 to the reference low voltage VL. At time point t4, the discharge control switch S1 charges the voltages Vs of the scan lines 110-1 to 110-m to the reference high voltage VH, and the discharge control switch S2 discharges the voltages Vd of the data lines 120-1 to 120-n and the voltage Vn of the common electrode Vcom of the display panel 100 to the reference low voltage VL. All of the pixel circuits 130 are selected, which causes all of the data voltages Vdata located at the pixel circuits 130 to be discharged. At time t5, all the data voltages Vdata located in the pixel circuit 130 are discharged to the reference low voltage VL. It is noted that the data voltage Vdata includes a residual voltage that is not normally discharged when the display device 10 is abnormally powered off. In addition, in one embodiment, the time difference between time point t3, time point t4, and time point t5 is negligible.

It should be noted that, in one embodiment, when the operating voltage VDD and the reset voltage VR of the display device 10 are abnormal, the discharge control circuit 200 performs a discharge operation on the pixel circuit 130. Details regarding implementation of the discharge control circuit 200 to perform the discharge operation may be found in the various embodiments of fig. 1-3B.

Fig. 4 is a flowchart illustrating a discharging method of a display device according to an embodiment of the utility model. The discharging method of the present embodiment may be performed by the display device 10 of fig. 1. Please refer to fig. 1 and fig. 4 at the same time. First, in step S410, the discharge control circuit 200 receives at least one of the operating voltage VDD and the reset voltage VR of the display device 10. Next, in step S420, the discharge control circuit 200 determines whether at least one of the operating voltage VDD and the reset voltage VR is abnormal. When neither the operating voltage VDD nor the reset voltage VR is abnormal, the process returns to step S410. Otherwise, when at least one of the operating voltage VDD and the reset voltage VR is abnormal, the process proceeds to step S430. In step S430, the discharge control circuit 200 turns on the discharge control switches S1, S2. Finally, in step S440, the discharge control circuit 200 discharges the data voltages located in all the pixel circuits 130 through the discharge control switches S1, S2. The implementation details of steps S410-S440 have been clearly described in the various embodiments of fig. 1-3B and are not repeated here.

In summary, the display device provided by the present utility model can conduct the switch through the discharge control circuit to perform the discharge operation on all the pixel circuits when at least one of the operation voltage and the reset voltage of the display device is abnormal. Thus, problems such as image retention or liquid crystal polarization of the display panel can be reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A display device, comprising:

a display panel, comprising:

a plurality of scan lines;

a plurality of data lines: and

a plurality of pixel circuits correspondingly coupled with the plurality of scanning lines and the plurality of data lines;

a first discharge control switch, a first end of which is coupled to the plurality of scan lines;

a second discharge control switch, a first end of which is coupled to the plurality of data lines; and

the discharge control circuit is coupled with the second end of the first discharge control switch, the control end of the first discharge control switch, the second end of the second discharge control switch and the control end of the second discharge control switch,

wherein the discharge control circuit is provided with a discharge operation for discharging the data voltages of the plurality of pixel circuits through the first discharge control switch and the second discharge control switch when at least one of the operation voltage and the reset voltage of the display device is abnormal.

2. The display device according to claim 1, wherein the discharge control circuit turns on the first discharge control switch and the second discharge control switch when at least one of the operation voltage and the reset voltage is abnormal.

3. The display device according to claim 1, wherein the discharge control circuit connects the second terminal of the first discharge control switch to a reference high voltage when at least one of the operation voltage and the reset voltage is abnormal.

4. The display device according to claim 3, wherein the first discharge control switch connects the plurality of scan lines to the reference high voltage when at least one of the operation voltage and the reset voltage is abnormal.

5. The display device according to claim 1, wherein the discharge control circuit connects the second terminal of the second discharge control switch to a reference low voltage when at least one of the operation voltage and the reset voltage is abnormal.

6. The display device according to claim 5, wherein the second discharge control switch connects the plurality of data lines and the common electrode of the display panel to the reference low voltage when at least one of the operation voltage and the reset voltage is abnormal.

7. The display device according to claim 1, wherein when at least one of the operation voltage and the reset voltage is abnormal, the voltage value of at least one of the operation voltage and the reset voltage is lower than the voltage value of the threshold voltage.

8. The display device according to claim 1, wherein the discharge control circuit further comprises:

a sensor configured to measure at least one of the operating voltage and the reset voltage to generate a sensing signal;

logic circuitry, coupled to the sensor, configured to generate a first discharge control switch control signal and a second discharge control switch control signal in accordance with the sensing signal;

the first discharge control switch control circuit is coupled to the logic circuit, the second end of the first discharge control switch and the control end of the first discharge control switch; and

and the second discharge control switch control circuit is coupled to the logic circuit, the second end of the second discharge control switch and the control end of the second discharge control switch.

9. The display device according to claim 8, wherein the sensor provides the sensing signal having the first voltage level when it is determined that a voltage value of at least one of the operation voltage and the reset voltage is lower than a voltage value of a threshold voltage.

10. The display device of claim 9, wherein the logic circuit provides the first discharge control switch control signal and the second discharge control switch control signal in response to the sense signal having the first voltage level,

the first discharge control switch control circuit turns on the first discharge control switch in response to the first discharge control switch control signal and connects the second end of the first discharge control switch to a reference high voltage, and

the second discharge control switch control circuit turns on the second discharge control switch in response to the second discharge control switch control signal and connects a second terminal of the second discharge control switch to a reference low voltage.