Pixel circuit discharge control method and device, detection equipment and storage medium

Abstract

The application discloses a pixel loop discharge control method and device, a detection equipment and a storage medium, and comprises the following steps: when it is detected that the detection equipment performs a shutdown operation, it is judged whether the signal of the signal input end is a low-level signal; if yes, it is determined that the discharge picture display is ended and the first switch tube is cut off; the signal input end is controlled to input a first-level signal, the voltage of the loop output end is adjusted to a preset voltage, and a timer is started to count a first time length, so that the first switch tube is turned on by the first-level signal, and the pixel loop is discharged through the loop output end; when the first time length reaches a first preset time length, the signal input end stops outputting the signal, the residual current in the pixel loop of the embodiment can completely release the residual current through the discharge path, damage of the electrical element caused by the residual current in the pixel loop is avoided, residual image caused by the residual current is avoided, and the quality of the display screen is improved.

Description

Technical Field

[0001] This invention relates to the field of display screen testing technology, and in particular to a pixel circuit discharge control method, apparatus, testing equipment, and storage medium. Background Technology

[0002] like Figure 1 The diagram shows a pixel circuit in the display screen. When testing the display screen, the testing equipment is powered by the power input terminal EVDD and the signal input terminal Vdata inputs a signal to drive the switching transistor Tdr to conduct, so that the light-emitting diode LED lights up.

[0003] After the test is completed, in order to release the current in the pixel circuit, the control signal input terminal Vdata continuously inputs a high-level signal to keep the switching transistor Tdr on, so that the current in the power input terminal EVDD passes through the light-emitting diode, and the display shows the discharge image. The current in the power input terminal EVDD and the current in the switching transistor Tdr are released through the light-emitting diode LED and the circuit output terminal Vper. After a preset time, the signal input terminal Vdata stops outputting the signal, and the display stops displaying the discharge image.

[0004] However, during the discharge process described above, even if the signal input terminal Vdata continuously inputs a high-level signal, when the voltage of the power input terminal EVDD gradually decreases due to discharge and becomes equal to the driving voltage of the light-emitting diode LED, and the signal input terminal Vdata stops outputting signals, causing the switching transistor Tdr to be turned off, the discharge path of the entire pixel circuit disappears. This prevents the residual current in the pixel circuit from being completely released, posing a risk of residual current damaging the electrical components in the pixel circuit, ultimately reducing the quality of the display screen and causing image retention on the display screen. Summary of the Invention

[0005] This invention provides a pixel circuit discharge control method, apparatus, detection device, and storage medium to solve the problem that the pixel circuit of a display screen cannot completely release current in the prior art.

[0006] In a first aspect, the present invention provides a pixel circuit discharge control method for controlling the discharge of a pixel circuit in a display screen. The pixel circuit includes a power input terminal, a signal input terminal, a first switching transistor, a light-emitting diode (LED), and a circuit output terminal. The control terminal of the first switching transistor is connected to the signal input terminal, the input terminal of the first switching transistor is connected to the power input terminal, and the output terminal of the first switching transistor is connected to both the LED and the circuit output terminal. The power input terminal, the signal input terminal, and the circuit output terminal are all connected to a detection device. The pixel circuit discharge control method includes:

[0007] When the detection device is detected to be performing a shutdown operation, it is determined whether the signal at the signal input terminal is a low-level signal;

[0008] If so, confirm that the discharge screen display has ended and confirm that the first switch is turned off;

[0009] The system controls the input of a first-level signal at the signal input terminal and adjusts the voltage at the output terminal of the circuit to a preset voltage, and starts a timer to count a first duration, so as to drive the first switch to conduct through the first-level signal, and the pixel circuit discharges through the output terminal of the circuit.

[0010] When the first duration reaches the first preset duration, the signal input terminal is controlled to stop outputting signals.

[0011] Optionally, before determining whether the signal input terminal is a low-level signal, the method further includes:

[0012] According to the preset discharge screen, the detection device is controlled to output voltage to the power input terminal and to input a second level signal to the signal input terminal. The second level signal drives the first switch to turn on so that the light-emitting diode lights up, and the display screen displays the discharge screen.

[0013] Optionally, before determining whether the signal input terminal is a low-level signal, the method further includes:

[0014] A timer is started to record the second duration when the display screen begins to show the discharge image;

[0015] When the second duration reaches the second preset duration, the control signal input terminal stops inputting the second level signal, so that the light-emitting diode is turned off and the display screen stops displaying the discharge image.

[0016] Optionally, the voltage of the first level signal is greater than the preset voltage.

[0017] Optionally, the pixel circuit further includes a second switch and a third switch, wherein the input terminal of the second switch is connected to the signal input terminal, the output terminal of the second switch is connected to the control terminal of the first switch, the input terminal of the third switch is connected to the output terminal of the first switch, and the output terminal of the third switch is connected to the circuit output terminal.

[0018] Optional, also includes:

[0019] Control the second switch and the third switch to be turned on.

[0020] Optionally, the pixel circuit also includes a grounding circuit connected to the power input terminal. After inputting a first-level signal at the control signal input terminal and adjusting the voltage at the circuit output terminal to a preset voltage, it further includes:

[0021] Control the grounding circuit to conduct.

[0022] Secondly, the present invention provides a pixel circuit discharge control device for controlling the discharge of a pixel circuit in a display screen. The pixel circuit includes a power input terminal, a signal input terminal, a first switching transistor, a light-emitting diode, and a circuit output terminal. The control terminal of the first switching transistor is connected to the signal input terminal, the input terminal of the first switching transistor is connected to the power input terminal, and the output terminal of the first switching transistor is connected to the light-emitting diode and the circuit output terminal respectively. The power input terminal, the signal input terminal, and the circuit output terminal are all connected to a detection device. The pixel circuit discharge control device includes:

[0023] The input signal judgment module is used to determine whether the signal at the signal input terminal is a low-level signal when the detection device performs a power-off operation.

[0024] The determination module is used to determine when the discharge screen display ends and when the first switching transistor is turned off.

[0025] The discharge control module is used to control the input of a first level signal at the signal input terminal and adjust the voltage at the output terminal of the circuit to a preset voltage, and start a timer to count a first duration, so as to drive the first switch to conduct through the first level signal, and the pixel circuit discharges through the output terminal of the circuit;

[0026] The discharge end control module is used to control the signal input terminal to stop outputting signals when the first duration reaches a first preset duration.

[0027] Thirdly, the present invention provides a detection device, the detection device comprising:

[0028] At least one processor; and

[0029] A memory that is communicatively connected to at least one processor; wherein,

[0030] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to perform the pixel circuit discharge control method of any of the first aspects of the present invention.

[0031] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the pixel circuit discharge control method of the first aspect of the present invention.

[0032] In this embodiment of the invention, when the detection device is detected to be performing a shutdown operation, it determines whether the signal at the signal input terminal is a low-level signal. If so, it determines that the discharge screen display has ended and that the first switch is turned off. It then controls the signal input terminal to input a first-level signal and adjusts the voltage at the circuit output terminal to a preset voltage. A timer is started to count the first duration, so that the first switch is turned on by the first-level signal, causing the pixel circuit to discharge through the circuit output terminal. When the first duration reaches the first preset duration, the control signal input terminal stops outputting the signal. This achieves the following: when the voltage at the power input terminal gradually decreases due to discharge and becomes equal to the driving voltage of the light-emitting diode, and the signal input terminal stops outputting the signal, causing the switch to turn off and the discharge path to disappear, the first-level signal is input at the signal input terminal and the voltage at the circuit output terminal is adjusted to a preset voltage to turn the switch back on. The pixel circuit reopens the discharge path, and the residual current in the pixel circuit can be completely released through the discharge path. This avoids damage to electrical components due to residual current in the pixel circuit and avoids image retention due to residual current, thus improving the quality of the display screen.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a pixel circuit;

[0036] Figure 2 This is a flowchart of a pixel circuit discharge control method provided in Embodiment 1 of the present invention;

[0037] Figure 3A This is a flowchart of a pixel circuit discharge control method provided in Embodiment 2 of the present invention;

[0038] Figures 3B-3D This is a schematic diagram of the discharge path of the pixel circuit;

[0039] Figure 3E This is a voltage timing diagram of the signal input terminal and the loop output terminal in this embodiment;

[0040] Figure 4This is a schematic diagram of the structure of a pixel circuit discharge control device provided in Embodiment 3 of the present invention;

[0041] Figure 5 This is a schematic diagram of the detection device provided in Embodiment 4 of the present invention. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0043] Example 1

[0044] Figure 2 This is a flowchart of a pixel circuit discharge control method provided in Embodiment 1 of the present invention. This embodiment is applicable to pixel circuit discharge control. The method can be executed by a pixel circuit discharge control device, which can be implemented in hardware and / or software. The pixel circuit discharge control device can be configured in a detection device. Figure 2 As shown, the pixel circuit discharge control method includes:

[0045] S201. When the detection device is detected to be performing a shutdown operation, determine whether the signal at the signal input terminal is a low-level signal.

[0046] In this embodiment, the pixel circuit is used to drive the pixels in the display screen to light up in order to display an image, such as Figure 1 As shown, the pixel circuit of this embodiment includes a power input terminal EVDD, a signal input terminal Vdata, a first switching transistor Tdr1, a light-emitting diode (LED), and a circuit output terminal Vpre. The control terminal of the first switching transistor Tdr1 is connected to the signal input terminal Vdata, the input terminal of the first switching transistor Tdr1 is connected to the power input terminal EVDD, and the output terminal of the first switching transistor Tdr1 is connected to both the LED and the circuit output terminal Vpre. For example, the common node S of the LED and the output terminal of the first switching transistor Tdr1 is connected to the circuit output terminal Vpre. The power input terminal EVDD, the signal input terminal Vdata, and the circuit output terminal Vpre are all connected to a detection device so that the detection device supplies power to the power input terminal EVDD, outputs control signals to the signal input terminal Vdata, and forms a circuit with the detection device through the circuit output terminal Vpre.

[0047] In one embodiment, the pixel circuit further includes a second switch Tdr2 and a third switch Tdr3. The input terminal of the second switch Tdr2 is connected to the signal input terminal Vdata, the output terminal of the second switch Tdr2 is connected to the control terminal of the first switch Tdr1, the input terminal of the third switch Tdr3 is connected to the output terminal of the first switch Tdr1, and the output terminal of the third switch Tdr3 is connected to the circuit output terminal Vpre. When the discharge program is entered after the detection is completed, the second switch Tdr2 and the third switch Tdr3 are controlled to be turned on.

[0048] In this embodiment, after the inspection device completes the test, the display screen needs to display a discharge image to release the residual current in the pixel circuit of each pixel in the display screen. Therefore, after the display screen discharges by displaying the discharge image, the inspection device is turned off, and the signal input terminal Vdata stops outputting, so that the first switch transistor Tdr1 is turned off. Usually, the discharge image is displayed for a certain duration and then the display of the discharge image stops. However, through the discharge of the discharge image, the voltage of the power input terminal EVDD gradually decreases. When the voltage of the power input terminal EVDD is equal to the voltage of the light-emitting diode LED, since the signal input terminal Vdata inputs a high-level signal to keep the first switch transistor Tdr1 on, the residual current in the circuit region M formed by the first switch transistor Tdr1 and the capacitor CSTG discharges through the circuit output terminal Vpre. When the voltage of the circuit region M is equal to the voltage of the circuit output terminal Vpre, and the signal input terminal Vdata stops outputting the signal after a preset duration, the first switch transistor Tdr1 is turned off, the inspection device is turned off, and the residual circuit in the circuit region M cannot be released.

[0049] In this embodiment, when the detection device performs a shutdown operation, it detects whether the signal at the detection signal input terminal Vdata is a low-level signal. If yes, it executes S202; otherwise, it continues to detect the signal at the detection signal input terminal Vdata.

[0050] S202, confirm the end of the discharge screen display and confirm the first switch tube is turned off.

[0051] If the signal input terminal Vdata is a low-level signal, for example, if the signal input terminal Vdata stops outputting signals, then it is determined that the discharge screen display has ended, and since the signal input terminal Vdata is a low-level signal, the first switching transistor Tdr1 is turned off.

[0052] S203, the control signal input terminal inputs a first level signal and adjusts the voltage at the loop output terminal to a preset voltage, and starts a timer to count the first duration, so as to drive the first switch tube to conduct through the first level signal, and the pixel loop discharges through the loop output terminal.

[0053] To release the current in circuit region M, a first-level signal can be input at the control signal input terminal Vdata, and the voltage at the loop output terminal Vpre can be adjusted to a preset voltage. This causes the first switch transistor Tdr1 to turn on under the drive of the first-level signal. The preset voltage can be a voltage that completely releases the residual current in circuit region M, thereby allowing the residual current in circuit region M to be completely released through the loop output terminal Vpre. The voltage of the first-level signal is greater than the preset voltage, so that the voltage at the control terminal G of the first switch transistor Tdr1 is greater than the voltage at the output terminal S, thus maintaining the first switch transistor Tdr1 on.

[0054] In addition, a timer can be started immediately when a first level signal is input at the control signal input terminal and the voltage at the circuit output terminal is adjusted to a preset voltage to count the first duration.

[0055] S204. When the first time period reaches the first preset time period, the control signal input terminal stops outputting signals.

[0056] The first preset duration can be the duration required for the residual current in the pixel circuit to be completely released. The first preset duration can be determined through experiments. When the first duration counted by the timer reaches the first preset duration, the control signal input terminal Vdata stops outputting the signal, the entire process of pixel circuit discharge ends, and the residual current in the pixel circuit is completely released.

[0057] In this embodiment of the invention, when the detection device is detected to be performing a shutdown operation, it determines whether the signal at the signal input terminal is a low-level signal. If so, it determines that the discharge screen display has ended and that the first switch is cut off. It then controls the signal input terminal to input a first-level signal and adjusts the voltage at the circuit output terminal to a preset voltage. A timer is started to count the first duration, so that the first switch is turned on by the first-level signal, causing the pixel circuit to discharge through the circuit output terminal. When the first duration reaches the first preset duration, the control signal input terminal stops outputting the signal. This achieves the following: when the voltage at the power input terminal gradually decreases due to discharge and becomes equal to the voltage of the switch, and the signal input terminal stops outputting the signal, causing the switch to be cut off and the discharge path to disappear, the first-level signal is input at the signal input terminal and the voltage at the circuit output terminal is adjusted to the preset voltage to turn the switch back on. The pixel circuit reopens the discharge path, and the residual current in the pixel circuit can be completely released through the discharge path. This avoids damage to electrical components due to residual current in the pixel circuit and avoids image retention due to residual current, thus improving the quality of the display screen.

[0058] Example 2

[0059] Figure 3AThis is a flowchart of a pixel circuit discharge control method provided in Embodiment 2 of the present invention. This embodiment of the present invention is an optimization based on Embodiment 1 described above, such as... Figure 3A As shown, the pixel circuit discharge control method includes:

[0060] S301. According to the preset discharge screen, control the output voltage of the detection device to input a second level signal to the power input terminal and the control signal input terminal. The second level signal drives the first switching transistor to conduct so that the light-emitting diode lights up and the display screen shows the discharge screen.

[0061] In this embodiment, the preset discharge screen can be a dynamically changing screen. When the preset screen is played, the voltage input to the power input terminal EVDD of the detection device gradually decreases to 0. In this embodiment, the voltage output to the power input terminal EVDD of the detection device and the voltage of the second level signal of the input signal terminal Vdata can be determined according to the preset discharge screen. Thus, the first switching transistor Tdr1 is driven to turn on through the second level signal. The current of the power input terminal EVDD flows into the light-emitting diode LED through the first switching transistor Tdr1. The light-emitting diode LED lights up, so that the display screen shows the discharge screen.

[0062] S302. When the display screen starts showing the discharge screen, start the timer to count the second duration.

[0063] Specifically, a timer can be started when the display screen begins to show the discharge screen, and the second duration can be counted by the timer.

[0064] S303. When the second time period reaches the second preset time period, the control signal input terminal stops inputting the second level signal so that the light-emitting diode is turned off and the display screen stops displaying the discharge screen.

[0065] like Figure 3B As shown, after the display screen starts showing the discharge image, the detection device stops outputting current to the power input terminal EVDD, and the second-level signal input to the signal input terminal Vdata drives the first switching transistor Tdr1 to remain on. When the detection device stops outputting current to the power input terminal EVDD, the voltage of the power input terminal EVDD gradually decreases. During this process, when the voltage of the power input terminal EVDD is greater than the driving voltage of the light-emitting diode (LED), current flows through the LED. That is, the residual current in the pixel circuit flows to the EVSS terminal through the LED. Figure 3B As shown in the F1 direction.

[0066] When the voltage at the power input terminal EVDD equals the driving voltage of the LED, current cannot flow through the LED to the EVSS terminal, the LED turns off, and the display screen stops showing the discharge image. At this time, the voltage in circuit region M is less than the voltage of the second-level signal input at the signal input terminal Vdata, causing the voltage at the control terminal G of the first switching transistor Tdr1 to be greater than the voltage at the output terminal S. The first switching transistor Tdr1 remains on. When the voltage in circuit region M is greater than the voltage at the loop output terminal Vpre, the residual current in circuit region M discharges through the loop output terminal Vpre. Figure 3C The direction is shown as F2 in the diagram.

[0067] As the residual current in circuit region M discharges through the loop output terminal Vpre, the voltage of circuit region M further decreases. When the voltage of circuit region M equals the loop output terminal Vpre, the residual current in circuit region M cannot discharge through the loop output terminal Vpre. Until the second duration counted by the timer reaches the second preset duration, the control signal input terminal Vdata stops inputting the second level signal, and the first switch transistor Tdr1 is turned off. By setting the second preset duration, the pixel loop is fully discharged through the loop output terminal Vpre, reducing the residual current in circuit region M.

[0068] S304. When the detection device is detected to be performing a shutdown operation, determine whether the signal at the signal input terminal is a low-level signal.

[0069] When the detection device is detected to be performing a shutdown operation, such as receiving a shutdown command, it is determined whether the signal at the signal input terminal is a low-level signal. For example, it is determined whether the signal input terminal Vdata has stopped outputting signals. If yes, S305 is executed; otherwise, the detection signal at the detection signal input terminal Vdata is continued.

[0070] S305, confirm the end of the discharge screen display and confirm the first switch transistor is turned off.

[0071] If the signal input terminal Vdata is a low-level signal, for example, if the signal input terminal Vdata stops outputting signals, then it is determined that the discharge screen display has ended. Furthermore, since the signal input terminal Vdata is a low-level signal, the first switching transistor Tdr1 is turned off, and the residual current in the circuit area M in the pixel loop has no discharge path in the pixel loop.

[0072] S306, the control signal input terminal inputs a first level signal and adjusts the voltage of the loop output terminal to a preset voltage, and starts a timer to count the first duration, so as to drive the first switch tube to conduct through the first level signal, and the pixel loop discharges through the loop output terminal.

[0073] In order to release the current in circuit region M, the signal input terminal Vdata can be controlled to input a first level signal and the voltage of the loop output terminal Vpre can be adjusted to a preset voltage, so that the first switching transistor Tdr1 is turned on under the drive of the first level signal. The preset voltage can be a voltage that completely releases the residual current in circuit region M, thereby allowing the residual current in circuit region M to be completely released through the loop output terminal Vpre.

[0074] In another embodiment, the pixel circuit also includes a grounding circuit connected to the power input terminal EVDD. One end of the grounding circuit is connected to the power input terminal EVDD, and the other end is connected to the ground terminal GND. By inputting a first level signal at the control signal input terminal and adjusting the voltage at the circuit output terminal to a preset voltage, the grounding circuit can be controlled to conduct. For example, the switch in the grounding circuit can be controlled to conduct.

[0075] like Figure 3D As shown, after the control signal input terminal Vdata in S303 stops inputting the second-level signal, the residual current in circuit region M cannot be released. After inputting the first-level signal at the control signal input terminal Vdata and adjusting the voltage of the loop output terminal Vpre to the preset voltage, the first-level signal output from the signal input terminal Vdata re-drives the first switching transistor Tdr1 to conduct. Furthermore, the preset voltage set at the loop output terminal Vpre can be much lower than the voltage of circuit region M, allowing circuit region M to discharge through the loop output terminal Vpre and the ground loop. Figure 3D As shown in directions F2 and F3, the discharge speed of circuit region M is increased.

[0076] In addition, a timer can be started immediately when a first level signal is input at the control signal input terminal and the voltage at the circuit output terminal is adjusted to a preset voltage to count the first duration.

[0077] S307. When the first time period reaches the first preset time period, the control signal input terminal stops outputting signals.

[0078] The first preset duration can be the duration for which the residual current in the pixel circuit is completely released. The first preset duration can be determined experimentally. When the first duration counted by the timer is greater than the first preset duration, it is determined that the residual current in the pixel circuit has been completely released, and the signal input terminal Vdata can be controlled to stop outputting the signal.

[0079] To more clearly illustrate the embodiments of the present invention, the amplification process of the pixel loop in this embodiment will be described below with reference to the accompanying drawings:

[0080] like Figure 3E The following is a voltage timing diagram of the signal input terminal Vdata and the loop output terminal Vpre during the discharge control process of the prior art and this application:

[0081] like Figure 3E As shown, the voltage timing of the power input terminal EVDD remains unchanged before and after the discharge control is improved. At time t1, the voltage of the signal input terminal Vdata before the improvement drops directly from V1 to V2, and the voltage of the loop output terminal Vpre remains V3 from the beginning to the end. This causes the voltage of the circuit region M in the pixel loop to be higher than the voltage of the loop output terminal Vpre at the beginning of time t1. Furthermore, since the voltage of the signal input Vdata drops directly from V1 to V2, the first switch Tdr1 is turned off, and the residual current in the circuit region M cannot be discharged through the loop output terminal Vpre.

[0082] After the improvement, at time t1, the input voltage level of the output command control signal input terminal Vdata is V4. Due to the delay, the signal input terminal Vdata outputs a voltage level of V4 at time t2, causing the first switch transistor Tdr1 to conduct. Simultaneously, at time t1, the voltage at the loop output terminal Vpre is reduced from V3 to V5, where V4 is greater than V1. This ensures that the difference between the voltage at the signal input terminal Vdata and the voltage in circuit region M is greater than 0 and greater than V5. Figure 3D As shown, the residual current in circuit region M can be released through the loop output terminal Vpre and through the grounding loop to the ground terminal GND. After time t2, when the residual current in circuit region M is completely released, the input voltage of the output command control signal input terminal Vdata is V2, and the first switching transistor Tdr1 is turned off.

[0083] Among them, voltages V4 and V5 can be set according to different pixel circuits. In one example, V3 = 0V, V4 = 5V, and V5 = -2V. This embodiment does not limit the voltage of each signal.

[0084] In this embodiment, the output voltage of the detection device can be controlled to the power input terminal and the control signal input terminal to input a second-level signal according to a preset discharge screen. This second-level signal drives the first switching transistor to conduct, causing the LED to light up. The display screen shows the discharge screen and a timer starts to count the second duration. When the second duration reaches the second preset duration, the control signal input terminal stops inputting the second-level signal, causing the LED to turn off and the display screen to stop displaying the discharge screen. When the detection device is detected to be performing a shutdown operation, it is determined whether the signal at the signal input terminal is a low-level signal. If so, it is determined that the discharge screen display has ended and the first switching transistor has been turned off. The control signal input terminal inputs the first-level signal and adjusts the voltage at the circuit output terminal to a preset voltage. The timer then starts to count the first duration, driving the first switching transistor through the first-level signal. When the transistor is turned on, the pixel circuit discharges through the circuit output terminal. When the first preset time is reached, the control signal input terminal stops outputting signals. This achieves a first-stage discharge of the pixel circuit in the display screen by first displaying a discharge image. When the detection device is detected to be performing a power-off operation and the signal at the signal input terminal is a low-level signal, it is determined that the first-stage discharge has ended. The control signal input terminal inputs a first-level signal and adjusts the voltage at the circuit output terminal to a preset voltage so that the first switching transistor is turned on again to perform a second-stage discharge of the pixel circuit. This solves the problem in the prior art that residual current in the pixel circuit cannot be released after the first-stage discharge. It can release the residual current in the pixel circuit, avoid damage to electrical components due to residual current in the pixel circuit, and avoid image retention caused by residual current, thus improving the quality of the display screen.

[0085] Example 3

[0086] Figure 4 This is a schematic diagram of a pixel circuit discharge control device provided in Embodiment 3 of the present invention. Figure 4 As shown, the pixel circuit discharge control device includes:

[0087] The input signal judgment module 401 is used to determine whether the signal at the signal input terminal is a low-level signal when the detection device performs a shutdown operation.

[0088] The determination module 402 is used to determine the end of the discharge screen display and to determine the cutoff of the first switching transistor;

[0089] The discharge control module 403 is used to input a first level signal at the control signal input terminal and adjust the voltage at the circuit output terminal to a preset voltage, and start a timer to count the first duration, so as to drive the first switch to conduct through the first level signal, and the pixel circuit discharges through the circuit output terminal.

[0090] The discharge end control module 404 is used to stop outputting signals at the control signal input terminal when the first time duration reaches the first preset time duration.

[0091] Optional, also includes:

[0092] The discharge screen display module is used to control the output voltage of the detection device to the power input terminal and the control signal input terminal to input a second level signal according to the preset discharge screen. The second level signal drives the first switching transistor to turn on so that the light-emitting diode lights up and the screen displays the discharge screen.

[0093] Optional, also includes:

[0094] The second duration statistics module is used to start a timer to count the second duration when the display screen starts showing the discharge screen;

[0095] The discharge screen display stop module is used to stop inputting the second level signal at the control signal input terminal when the second time period reaches the second preset time period, so that the light-emitting diode is turned off and the display screen stops displaying the discharge screen.

[0096] Optionally, the voltage of the first level signal is greater than a preset voltage.

[0097] Optionally, the pixel circuit also includes a second switch and a third switch. The input terminal of the second switch is connected to the signal input terminal, the output terminal of the second switch is connected to the control terminal of the first switch, the input terminal of the third switch is connected to the output terminal of the first switch, and the output terminal of the third switch is connected to the circuit output terminal.

[0098] Optional, also includes:

[0099] The switching transistor control module is used to control the conduction of the second and third switching transistors.

[0100] Optionally, the pixel circuit also includes a grounding circuit connected to the power input terminal, and further includes:

[0101] The grounding loop control module is used to control the conduction of the grounding loop.

[0102] The pixel circuit discharge control device provided in the embodiments of the present invention can execute the pixel circuit discharge control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0103] Example 4

[0104] Figure 5A schematic diagram of a detection device 40, which can be used to implement embodiments of the present invention, is shown. The detection device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The detection device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0105] like Figure 5 As shown, the detection device 40 includes at least one processor 41 and a memory, such as a read-only memory (ROM) 42 or a random access memory (RAM) 43, communicatively connected to the at least one processor 41. The memory stores computer programs executable by the at least one processor. The processor 41 can perform various appropriate actions and processes based on the computer program stored in the ROM 42 or loaded from storage unit 48 into the RAM 43. The RAM 43 can also store various programs and data required for the operation of the detection device 40. The processor 41, ROM 42, and RAM 43 are interconnected via a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0106] Multiple components in the testing device 40 are connected to the I / O interface 45, including: an input unit 46, such as a keyboard, mouse, etc.; an output unit 47, such as various types of displays, speakers, etc.; a storage unit 48, such as a disk, optical disk, etc.; and a communication unit 49, such as a network card, modem, wireless transceiver, etc. The communication unit 49 allows the testing device 40 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0107] Processor 41 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 41 performs the various methods and processes described above, such as pixel loop discharge control methods.

[0108] In some embodiments, the pixel circuit discharge control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 48. In some embodiments, part or all of the computer program may be loaded and / or installed on the detection device 40 via ROM 42 and / or communication unit 49. When the computer program is loaded into RAM 43 and executed by processor 41, one or more steps of the pixel circuit discharge control method described above may be performed. Alternatively, in other embodiments, processor 41 may be configured to perform the pixel circuit discharge control method by any other suitable means (e.g., by means of firmware).

[0109] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0110] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0111] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0112] To provide interaction with a user, the systems and techniques described herein can be implemented on a detection device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the detection device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0113] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0114] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0115] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0116] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A pixel circuit discharge control method, characterized in that, A method for controlling the discharge of a pixel circuit in a display screen is used. The pixel circuit includes a power input terminal, a signal input terminal, a first switching transistor, a light-emitting diode (LED), and a circuit output terminal. The control terminal of the first switching transistor is connected to the signal input terminal, the input terminal of the first switching transistor is connected to the power input terminal, and the output terminal of the first switching transistor is connected to both the LED and the circuit output terminal. The power input terminal, signal input terminal, and circuit output terminal are all connected to a detection device. The pixel circuit discharge control method includes: When the detection device is detected to be performing a shutdown operation, it is determined whether the signal at the signal input terminal is a low-level signal; If so, confirm that the discharge screen display has ended and confirm that the first switch is turned off; The system controls the input terminal to receive a first-level signal and adjusts the voltage at the output terminal of the circuit to a preset voltage. A timer is then started to count a first duration, so that the first switch is turned on by the first-level signal, and the pixel circuit discharges through the output terminal of the circuit. The voltage of the first-level signal is greater than the preset voltage, so that the voltage at the control terminal of the first switch is greater than the voltage at the output terminal, thereby maintaining the first switch on. When the first duration reaches the first preset duration, the signal input terminal is controlled to stop outputting signals.

2. The pixel circuit discharge control method according to claim 1, characterized in that, Before determining whether the signal input terminal is a low-level signal, the method further includes: According to the preset discharge screen, the detection device is controlled to output voltage to the power input terminal and to input a second level signal to the signal input terminal. The second level signal drives the first switch to turn on so that the light-emitting diode lights up, and the display screen displays the discharge screen.

3. The pixel circuit discharge control method according to claim 2, characterized in that, Before determining whether the signal input terminal is a low-level signal, the method further includes: A timer is started to record the second duration when the display screen begins to show the discharge image; When the second duration reaches the second preset duration, the control signal input terminal stops inputting the second level signal, so that the light-emitting diode is turned off and the display screen stops displaying the discharge image.

4. The pixel circuit discharge control method according to any one of claims 1-3, characterized in that, The pixel circuit further includes a second switch and a third switch. The input terminal of the second switch is connected to the signal input terminal, the output terminal of the second switch is connected to the control terminal of the first switch, the input terminal of the third switch is connected to the output terminal of the first switch, and the output terminal of the third switch is connected to the circuit output terminal.

5. The pixel circuit discharge control method according to claim 4, characterized in that, Also includes: Control the second switch and the third switch to be turned on.

6. The pixel circuit discharge control method according to any one of claims 1-3, characterized in that, The pixel circuit also includes a grounding circuit connected to the power input terminal. After controlling the signal input terminal to input a first-level signal and adjusting the voltage at the output terminal of the circuit to a preset voltage, it further includes: Control the grounding circuit to conduct.

7. A pixel circuit discharge control device, characterized in that, For controlling the discharge of pixel circuits in a display screen, the pixel circuit includes a power input terminal, a signal input terminal, a first switching transistor, a light-emitting diode, and a circuit output terminal. The control terminal of the first switching transistor is connected to the signal input terminal, the input terminal of the first switching transistor is connected to the power input terminal, and the output terminal of the first switching transistor is connected to both the light-emitting diode and the circuit output terminal. The power input terminal, signal input terminal, and circuit output terminal are all connected to a detection device. The pixel circuit discharge control device includes: The input signal judgment module is used to determine whether the signal at the signal input terminal is a low-level signal when the detection device performs a power-off operation. The determination module is used to determine when the discharge screen display ends and when the first switching transistor is turned off. The discharge control module is used to control the input of a first level signal at the signal input terminal and adjust the voltage at the output terminal of the circuit to a preset voltage, and start a timer to count a first duration, so as to drive the first switch to conduct through the first level signal, and the pixel circuit discharges through the output terminal of the circuit; wherein, the voltage of the first level signal is greater than the preset voltage, so that the voltage at the control terminal of the first switch is greater than the voltage at the output terminal, so as to maintain the first switch conducting; The discharge end control module is used to control the signal input terminal to stop outputting signals when the first duration reaches a first preset duration.

8. A testing device, characterized in that, The testing equipment includes: At least one processor; and A memory that is communicatively connected to at least one processor; wherein, The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to perform the pixel circuit discharge control method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the pixel circuit discharge control method of any one of claims 1-6.

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