WO2021008102A1 - Display device, short circuit detection method and device for display panel - Google Patents

Abstract

A display device (200), a short circuit detection method and device (100) for a display panel. A power supply voltage is supplied to a display driver power supply pin (P1) of the display panel (02) (S101); when executed for a first preset time delay, a first voltage state of a short circuit detection pin (P2) of the display panel is detected (S102); and if the first voltage stage indicates that no error is present in the short circuit detection pin (P2), then the display panel (02) is determined to be free of a short circuit (S103), thus preventing the consequence of a burnt screen as a result of a lack of detection with respect to the short circuit detection pin (P2) during a boot phase.

Description

Short circuit detection method and device for display equipment and display panel

This patent application claims the priority of the Chinese patent application filed on July 12, 2019 with the application number 201910629612.X, the full text of which is incorporated herein by reference.

Technical field

This application relates to the field of organic light-emitting diode (Organic Light-Emitting Diode, OLED) detection technology, and in particular to a short circuit detection method and device for display devices and display panels.

Background technique

With the rapid development of OLED display panels, OLED display panels have been used in many types of products, such as mobile phones, tablets, computers, TVs, industrial equipment, medical instruments and other products with displays. In order to ensure that OLED display panels For normal display, it is necessary to detect whether there is a short circuit on the display panel during the startup phase.

In related technologies, in the system boot phase, when it is judged that the value of the environment variable does not exceed the preset number of abnormal times, power is supplied to the display panel, and then the kernel (kernel) is started. In the Kernel phase, every certain time, through a The thread detects whether the display panel is short-circuited, and realizes the monitoring of the short-circuit condition of the display panel.

However, the monitoring of the display panel's short-circuit condition in the above scheme is mainly in the Kernel phase. After the display panel is powered on in the Boot phase, there is an interval of more than 1 second between starting the Kernel. In this 1 second interval, it is ignored. Monitoring the short circuit of the display panel, therefore, when there is a short circuit, the display panel cannot be controlled to lose power in time, which can easily cause the display panel to burn screen due to the short circuit.

Application content

The present application provides a short-circuit detection method and device for a display panel, which intends to overcome the problem that the related art cannot fully detect the short-circuit condition of the display panel.

In some embodiments, the present application provides a short circuit detection device for a display panel, the device includes: a main board and a display panel;

The display panel is connected to the first output pin of the main board through a display drive power supply pin, the display panel is connected to the input pin of the main board through a short-circuit detection pin; the display panel is driven through the display The power supply pin receives the power supply voltage provided by the motherboard to control the display panel to light up; the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin is abnormal; the voltage state includes a first voltage state ；

The main board is used to provide a power supply voltage for the display drive power supply pins of the display panel;

The main board is further configured to detect the first voltage state of the short-circuit detection pin of the display panel after executing the first preset time delay;

The main board is further configured to determine that the display panel does not have a short circuit if the first voltage state indicates that the short-circuit detection pin is not abnormal.

In some embodiments, the voltage state further includes a second voltage state;

The main board is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

The main board is also used to detect the second voltage state of the short-circuit detection pin of the display panel;

The main board is further configured to determine that the display panel has a short circuit if the second voltage state indicates that the short-circuit detection pin is abnormal.

In some embodiments, the motherboard is also used for:

If the second voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, the motherboard is used for:

If the display panel has a short circuit, control the display panel to power down and add 1 to the value of the environmental variable; the value of the environmental variable is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel ；

If the display panel does not have a short circuit, then the Kernel is started.

In some embodiments, the motherboard is further configured to: if the short-circuit detection pin is at a high level, determine that the short-circuit detection pin is abnormal.

In some embodiments, the motherboard is also used for:

If the value of the environmental variable is less than or equal to the preset value, a power supply voltage is provided for the display drive power supply pin of the display panel.

In some embodiments, the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.

In some embodiments, the display panel is connected to the second output pin of the main board through a logic control power supply pin;

The main board is used for controlling the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.

In some embodiments, the present application provides a short circuit detection method of a display panel, the method includes:

Providing a power supply voltage for the display driving power supply pin of the display panel;

After performing the first preset time delay, detecting the first voltage state of the short-circuit detection pin of the display panel;

If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In a possible implementation manner, the method further includes:

If the first voltage state indicates that the short-circuit detection pin is abnormal, execute a second preset time delay;

Detecting the second voltage state of the short-circuit detection pin of the display panel;

If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

In some embodiments, the present application provides a display device, including:

The display panel is configured to present an image screen;

The speaker is configured to reproduce sound;

Power supply, configured to provide electrical energy;

The controller is configured to detect the first voltage state of the short-circuit detection pin of the display panel when the power supply supplies power to the display panel for a first preset time delay; if the first voltage state indicates If there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, the controller is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

The second voltage state of the short-circuit detection pin of the display panel is detected, and if the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

In some embodiments, the controller is further configured to control the display panel to be powered off if there is a short circuit on the display panel, and increase the value of the environmental variable by 1;

If the display panel does not have a short circuit, start the Kernel;

The value of the environmental variable is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel.

In some embodiments, the controller is further configured to determine that the short-circuit detection pin is abnormal if the short-circuit detection pin is at a high level.

In some embodiments, the controller is further configured to provide a power supply voltage for the display driving power supply pin of the display panel if the value of the environmental variable is less than or equal to a preset value.

In some embodiments, the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.

In some embodiments, the display panel is connected to the second output pin of the controller through a logic control power supply pin;

The controller is used to control the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.

The application also provides a display device, including: a circuit board and a display panel; the circuit board is provided with a main control circuit;

The display panel is connected to the first output pin of the main control circuit through a display drive power supply pin, and the display panel is connected to the input pin of the main control circuit through a short-circuit detection pin; The display drive power supply pin receives the supply voltage provided by the main control circuit to control the display panel to light up; the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin is abnormal; the voltage The state includes the first voltage state;

The main control circuit is used to provide a power supply voltage for the display drive power supply pin of the display panel; and after a first preset time delay is executed, detect the first voltage state of the short-circuit detection pin of the display panel;

If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, the voltage state further includes a second voltage state;

The main control circuit is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal, and detect the second voltage of the short-circuit detection pin of the display panel status;

If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

The embodiment of the application provides a display device, a short-circuit detection method and device for a display panel, by providing a power supply voltage for the display driving power supply pin of the display panel, and after performing a first preset time delay, detecting the display panel The first voltage state of the short-circuit detection pin. If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that the display panel does not have a short circuit. This solution detects the short circuit of the display panel immediately after the display drive power supply pin is powered on The pin starts the detection process, so that after determining that there is no short circuit in the current display panel, proceed to the next process, such as entering the Kernel phase, which realizes the seamless connection of the short-circuit detection pin detection from the Boot phase to the Kernel phase, and prevents the boot phase Lack of the consequence of burning screen caused by short-circuit detection pin detection.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are of the present invention. For some of the embodiments of the application, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram of short-circuit detection of a display panel in the related art;

2 is a schematic structural diagram of an embodiment of a short circuit detection device for a display panel provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a power-on sequence and a power-off sequence of a display panel provided by an embodiment of the application;

4(a), 4(b), and 4(c) are schematic diagrams of the voltage state of a short-circuit detection pin provided by an embodiment of the application;

5 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel according to an embodiment of the application;

6 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel according to an embodiment of the application;

FIG. 7 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel according to an embodiment of the application;

8 is a schematic structural diagram of a short-circuit detection device for a display panel provided by an embodiment of the application;

FIG. 9 is a schematic diagram of the hardware structure of a motherboard provided by an embodiment of the application;

FIG. 10 is a schematic diagram of a display device provided by an embodiment of the application;

FIG. 11 is a block diagram of the hardware configuration of a display device provided by an embodiment of the application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The terms "first", "second", etc. in the description, claims, and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

In related technologies, the system-level chip of the motherboard supplies power to the display panel during the boot phase, and a thread polls the short circuit detection (also expressed as Error_DET or Error_Detect) pins at regular intervals from the kernel phase. The state of the display panel is shown in Figure 1. Figure 1 is a schematic diagram of short-circuit detection of a display panel in the related technology. The system-on-chip (SOC) chip of the motherboard is the logic control power supply pin (VDD) of the display panel at t1. ) Power supply, supply power to the display drive power supply pin (EVDD) of the display panel at time t2, and perform the first polling of the Error_Detection pin in the kernel phase at time t3. There is a time interval greater than 1 second between t2 and t3. If the Error_Detection pin reports an error within a short period of time after the EVDD is powered on in the Boot phase, you can only find the abnormality when you first poll the Error_Detection pin after entering the Kernel phase. This will not power off the display panel in time, which will easily cause the display panel burn.

In view of the above problems, the short-circuit detection device of the display panel provided by the present application can comprehensively monitor whether the display panel has a short-circuit.

The short circuit detection device of the display panel provided in the present application will be described below through several embodiments in some embodiments.

The short circuit detection device for the display panel in this solution can be applied to any terminal device with a display screen, such as mobile phones, tablets, TVs, personal computers, notebooks, wearables, etc., and can also be applied to industrial equipment or medical equipment and many more.

2 is a schematic structural diagram of an embodiment of a short-circuit detection device for a display panel provided by an embodiment of the application. As shown in FIG. 2, the short-circuit detection device for a display panel includes a main board 01 and a display panel 02, and the main board 01 is connected to the display panel 02.

In some embodiments, the motherboard is connected to at least the display drive power supply pin P1 of the display panel and the short-circuit detection pin P2 of the display panel; in some embodiments, the motherboard is also connected to the logic control power supply pin P3 of the display panel;

For example, the first output pin A1 of the SOC chip (system-on-chip) of the motherboard is connected to EVDD P1 on the screen driver (Time Control, TCON) board of the display panel, and the input pin A3 of the SOC is connected to the Error_Detection P3 pin. In some embodiments, the second output pin A2 of the SOC is also connected to VDD P2.

The main board supplies power to the display panel through the display drive power supply pin P1 and the logic control power supply pin P3. The display panel receives the power supply voltage provided by the main board through the display drive power supply pin P1 to control the display panel to light up, and the short circuit detection pin P2 detects the display. Whether the panel is short-circuited, the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin (Error_Detection pin) P2 is abnormal, and the voltage state includes the first voltage state and/or the second voltage state.

For example, the Error_Detection pin P2 is a pin of the display panel. When the display panel has a short circuit, the Error_Detection pin P2 is high.

In some embodiments, the first output pin A1, the input pin A2, and the second output pin A3 are any general-purpose input/output (GPIO) pins of the SOC.

In some embodiments, the main board 01 is used to detect the first voltage state of the short-circuit detection pin of the display panel after the first preset time delay is executed. If the first voltage state indicates that the short-circuit detection pin is not abnormal, then Make sure that there is no short circuit on the display panel.

When it is determined that the display panel does not have a short-circuit state, the main board 01 provides a supply voltage to the EVDD pin P1 to power up the display panel 02.

In some embodiments, the main board 01 also provides a supply voltage for the VDD pin P3 before supplying the supply voltage for the EVDD pin P1, and VDD and EVDD have different timing requirements according to the specification information of different products.

Taking Fig. 3 as a possible design, Fig. 3 is a schematic diagram of the power-on sequence and power-off sequence of a display panel provided by an embodiment of the application. The motherboard 01 needs to provide logic control power supply pin (VDD pin) P3. Provide voltage and provide voltage for display drive power supply pin (EVDD pin) P1 after 500ms. It can be seen from Figure 1 that the interval between t1 and t2 is 500 ms.

After executing the first preset time delay, the main board 01 detects the first voltage state of the short-circuit detection pin P2 of the display panel 02, and determines the first voltage state according to the voltage level of the short-circuit detection pin P2. In some embodiments, if the short-circuit detection pin P2 is at a high level, it indicates that the short-circuit detection pin P2 is abnormal, and if the short-circuit detection pin P2 is at a low level, it indicates that the short-circuit detection pin P2 is not abnormal.

In other embodiments, if the short-circuit detection pin P2 is low, it means that the short-circuit detection pin P2 is abnormal, and if the short-circuit detection pin P2 is high, it means that the short-circuit detection pin P2 is not abnormal.

Either the high level or the low level of the above-mentioned short-circuit detection pin P2 can be used as a judgment of an abnormal situation, and those skilled in the art can set it according to actual requirements.

In some embodiments, the first preset time delay may be 100 ms.

If the first voltage state indicates that there is no abnormality in the short-circuit detection pin P2, it is determined that the display panel 02 does not have a short-circuit, so as to proceed to the next process, such as starting the Kernel normally, and ending the short-circuit detection process of the display panel 02 in the Boot phase.

An embodiment of the application provides a short-circuit detection device for a display panel, including a main board 01 and a display panel 02. The display panel 02 is connected to the first output pin A1 of the main board 01 through the display drive power supply pin P1, and the display panel 02 is short-circuited The detection pin P2 is connected to the input pin A2 of the main board 01; the display panel 02 receives the power supply voltage provided by the main board 01 through the display drive power supply pin P1 to control the display panel 02 to light up, and the voltage state of the short-circuit detection pin P2 is used to indicate a short circuit Whether the detection pin is abnormal, the voltage state includes the first voltage state; by providing the power supply voltage to the display drive power supply pin P1 of the display panel 02, and after the first preset time delay is executed, the short circuit detection lead of the display panel is detected The first voltage state of the pin P2, if the first voltage state indicates that there is no abnormality in the short-circuit detection pin P2, it is determined that there is no short-circuit in the display panel.

This solution starts the detection process on the short-circuit detection pin of the display panel immediately after the EVDD is powered on, so that after determining that there is no short-circuit in the current display panel, proceed to the next process, such as entering the Kernel phase, which realizes the short-circuit between the Boot phase and the Kernel phase The seamless connection of the detection pin detection prevents the consequence of screen burn caused by the lack of detection of the short-circuit detection pin during the Boot phase.

4(a), 4(b), and 4(c) are schematic diagrams of the voltage state of a short-circuit detection pin provided by an embodiment of the application. As shown in Figure 4(a) to Figure 4(c), when the display panel 02 does not have a short circuit, as shown in Figure 4(a), the Error_Detection pin P2 is low, for example, the voltage of the Error_Detection pin P2 When it is 0V; as shown in Figure 4(b), Error_Detection pin P2 is high, that is, the voltage of Error_Detection pin P2 is not zero and continues to be high for a period of time, which can be less than 1s Or a longer period of time; as shown in Figure 4(c), it is only a glitch phenomenon of the Error_Detection pin P2. It can be seen that the level of the Error_Detection pin P2 is non-continuously high in this case Level.

This solution is to avoid the possibility of misjudging that the display panel 02 has a short circuit due to the detection of the non-continuous high level of the Error_Detection pin P2. When the first voltage state indicates that the Error_Detection pin P2 is abnormal, continue to the display panel 02 The Error_Detection pin P2 performs the second detection.

In conjunction with the schematics shown in Figure 4(a) to Figure 4(c), the motherboard 01 indicates that the Error_Detection pin P2 is abnormal in the first voltage state, that is, when the Error_Detection pin P2 is detected to be high, the Error_Detection pin P2 needs to be further determined Whether the high level of the display panel is a continuous high level, the second preset time delay is executed, which is different from the high level of the Error_Detection pin P2 through a single detection in the related technology. The solution is to prevent the misjudgment that the display panel 02 has a short circuit because the detected high level is only a glitch phenomenon. A second test is required. Before that, a certain preset time delay is required to determine The high level of Error_Detection pin P2 is continuous.

In some embodiments, the second preset time is 60 ms.

After the second preset time delay is executed, the motherboard detects the second voltage state of the Error_Detection pin P2 of the display panel, and determines the second voltage state according to the voltage level of the Error_Detection pin P2. In some embodiments, if Error_Detection If the pin P2 is at a high level, it means that the level of the Error_Detection pin P2 is a continuous high level, that is, there is a short circuit in the display panel. If the Error_Detection pin P2 is at a low level, it means that there is no short circuit in the display panel.

In this embodiment, when the first voltage state indicates that the short-circuit detection pin is abnormal, the motherboard executes a second preset time delay and detects the second voltage state of the short-circuit detection pin of the display panel. If the second voltage state indicates If the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited. When the first voltage state indicates that the short-circuit detection pin is abnormal, this embodiment further determines the abnormality based on the first voltage state indicating that the short-circuit detection pin is abnormal. Whether it is an abnormality caused by a short circuit of the display panel, to ensure accurate judgment of whether the display panel has a short circuit, and to prevent misjudgment of the display panel short circuit when the display panel is normal.

On the basis of the above embodiment, if the motherboard 01 determines that the display panel 02 has a short circuit, it needs to control the display panel 02 to power down in time. In some embodiments, the display drive power supply of the display panel 02 can be controlled according to a preset timing. Pin P1 and logic control power supply pin P3 are powered down.

According to different display panels and different application scenarios, there can be different preset timings. Taking the power-down timing of the display panel shown in Figure 3 as an example, the motherboard controls the power-off of the display panel 02, including: controlling EVDD The pin P1 is powered down first, and the VDD pin P2 is controlled to be powered down after an interval of 30ms.

In addition, the value of the environment variable is increased by 1, and the value of the environment variable (ErrorTimes) is used to determine whether to provide a power supply voltage for the display drive power supply pin P1 of the display panel 02. When detecting a short circuit on the display panel 02, add 1 to ErrorTimes and save it. When the accumulated value of ErrorTimes exceeds the preset value, the motherboard will not supply power to EVDD.

In some embodiments, the short-circuit detection method of the display panel, before providing the power supply voltage to the display drive power supply pin P1 of the display panel 02, further includes: if the value of the environmental variable is less than or equal to the preset value, then the display The display drive power supply pin P1 of the panel 02 provides the power supply voltage.

For example, assuming that the product specification requires ErrorTimes to be less than 3, after supplying the supply voltage to the VDD pin P3, determine whether the value of ErrorTimes is less than 3. If so, supply the supply voltage to the EVDD pin P1, and it will display The panel lights up; if not, no supply voltage is provided to the EVDD pin P1, so that the display panel is in a black screen state to prevent the display panel from burning.

This solution provides a short-circuit detection method for a display panel, which is applied to the device described in the above-mentioned embodiments. The following embodiments are provided to illustrate the short-circuit detection method for a display panel provided in this application.

FIG. 5 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel provided by an embodiment of the application. As shown in FIG. 5, the short-circuit detection method of the display panel includes:

S101: Provide a power supply voltage for the display drive power supply pin of the display panel.

In this step, the motherboard provides a supply voltage for the EVDD pin to power up the display panel.

S102: After executing the first preset time delay, detect the first voltage state of the short-circuit detection pin of the display panel.

After the power supply voltage is provided for the display driver power supply pin in step S101, the first preset time delay is executed. After the delay, the motherboard detects the first voltage state of the Error_Detection pin of the display panel according to the voltage of the Error_Detection pin The high and low determine the first voltage state. As an example, if the Error_Detection pin is high, it means that there is a short circuit on the display panel, and if the Error_Detection pin is low, it means that there is no short circuit on the display panel.

In some embodiments, the first preset time delay may be 100 ms.

S103: If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit on the display surface, and the next process is performed, for example, the Kernel is normally started, and the short-circuit detection process of the display panel in the Boot phase is ended.

An embodiment of the present application provides a short circuit detection method for a display panel, by providing a power supply voltage for the display drive power supply pin of the display panel, and after performing a first preset time delay, detecting the short circuit detection pin of the display panel In the first voltage state, if the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel. This solution starts the detection process on the short-circuit detection pin of the display panel immediately after the EVDD is powered on, and realizes the seamless connection of the short-circuit detection pin detection from the Boot phase to the Kernel phase, and prevents the short-circuit detection pin detection due to the lack of the Boot phase. And the consequence of burning screen.

Based on the embodiment shown in FIG. 5, FIG. 6 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel provided by an embodiment of the application; this solution is to avoid detecting the non-persistence of the Error_Detection pin. High level, and it is misjudged that the display panel may have a short circuit. When the first voltage state indicates that the display panel has a short circuit, continue to perform a second detection on the Error_Detection pin of the display panel.

The short circuit detection method of the display panel shown in FIG. 6 further includes:

S104: If the first voltage state indicates that the short-circuit detection pin is abnormal, execute a second preset time delay.

In this step, if the first voltage state indicates that the short-circuit detection pin is abnormal, that is, when the Error_Detection pin is detected as high, it is necessary to further determine whether the high level of the Error_Detection pin is a continuous high level, then Perform the second preset time delay. Unlike in the related art, when the Error_Detection pin is high level through a single detection, it is determined that the display panel is short-circuited. This solution is to prevent the detected high level from being only a glitch phenomenon, which may lead to misjudgment of the presence of the display panel Short circuit requires a second detection. Before that, a certain preset time delay is required to ensure that the high level of the Error_Detection pin is continuous.

In some embodiments, the second preset time is 60 ms.

S105: Detect the second voltage state of the short-circuit detection pin of the display panel.

After the second preset time delay is executed, the motherboard detects the second voltage state of the Error_Detection pin of the display panel, and determines the second voltage state according to the voltage level of the Error_Detection pin. In some embodiments, if the Error_Detection pin is If it is high, it means that the level of the Error_Detection pin is continuously high, that is, there is an abnormality in the short-circuit detection pin. If the Error_Detection pin is low, it means that there is no abnormality in the short-circuit detection pin.

S106: If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

In this step, if the second voltage state indicates that the short-circuit detection pin is abnormal, indicating that the short-circuit detection pin is continuously high, it is determined that the display panel is short-circuited.

S107: If the second voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In this step, if the second voltage state indicates that the short-circuit detection pin is not abnormal, indicating that the short-circuit detection pin is a non-continuous high level, such as a voltage glitch, it is determined that there is no short circuit in the display panel.

In an implementation manner in some embodiments, after it is determined that the display panel is short-circuited, it is necessary to control the display panel to power down in time. In some embodiments, the display drive power supply pin of the display panel can be controlled according to a preset timing. And logic control power supply pin power down.

According to different display panels and different application scenarios, there can be different preset timings. Taking the power-down timing of the display panel shown in Figure 3 as an example, controlling the power-off of the display panel includes: controlling EVDD The pin is powered down first, and the VDD pin is controlled to be powered down after an interval of 30ms.

The value of the environment variable (ErrorTimes) is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel. When a short circuit is detected on the display panel, add 1 to ErrorTimes and save it. When the accumulated value of ErrorTimes exceeds the preset value, the motherboard will not supply power to EVDD.

If it is determined that the display panel does not have a short circuit, the next process is performed, for example, the Kernel is normally started, and the short circuit detection process of the display panel in the Boot phase is ended.

In this embodiment, when the first voltage state indicates that the short-circuit detection pin is abnormal, the second preset time delay is executed, and the second voltage state of the short-circuit detection pin of the display panel is detected. If the second voltage state indicates a short-circuit If the detection pin is abnormal, it is determined that the display panel is short-circuited, and the value of the environmental variable is further increased by 1. The value of the environmental variable is used to determine whether to provide the power supply voltage for the display drive power supply pin of the display panel, and in the first voltage state When an abnormality is indicated on the short-circuit detection pin, it is further determined whether the abnormality is caused by a short-circuit of the display panel to ensure accurate judgment of whether the display panel is short-circuited, and to prevent misjudgment of the display panel short-circuit when the display panel is normal.

FIG. 7 is a schematic flowchart of an embodiment of a method for short-circuit detection of a display panel provided by an embodiment of the application. On the basis of the above-mentioned embodiment, in conjunction with FIG. 7, the whole solution is exemplarily explained from another angle, as As shown in Figure 7, it includes the following steps:

S1: Power on.

S2: The logic control power supply pin is powered on, that is, the motherboard provides the power supply voltage to the logic control power supply pin.

S3: Determine whether the environment variable is less than 3.

If not, execute step S7: kernel startup.

If yes, proceed to step S4: the display drive power supply pin is powered on, that is, the motherboard provides a power supply voltage to the display drive power supply pin.

After step S4, S5: execute the first preset time delay.

After step S5, S6: Detect whether the level of the short-circuit detection pin is normal. If the level of the short-circuit detection pin is high, it is abnormal; if it is low, it is normal.

If the level of the short-circuit detection pin is normal, execute S7.

If the level of the short-circuit detection pin is abnormal, execute S8: execute the second preset time delay.

After S8, execute S9: check whether the level of the short-circuit detection pin is normal. If the level of the short-circuit detection pin is high, it is abnormal; if it is low, it is normal.

If the level of the short-circuit detection pin is normal, execute S7.

If the level of the short-circuit detection pin is abnormal, execute S10: Control the display panel to power down, and add 1 to the value of the environment variable.

After S10, step S7 is executed.

This embodiment detects whether the display panel is short-circuited in the Boot phase, and detects the display panel twice according to the first preset time and the second preset time to avoid misjudgment of the short-circuit condition of the display panel.

FIG. 8 is a schematic structural diagram of a short-circuit detection device for a display panel provided by an embodiment of the application. As shown in FIG. 8, the short-circuit detection device 100 for the display panel includes:

The power supply circuit 101 is configured to provide a power supply voltage for the display drive power supply pin of the display panel;

The detection circuit 102 is configured to detect the first voltage state of the short-circuit detection pin of the display panel after the first preset time delay is executed;

The processing circuit 103 is configured to start the kernel Kernel if the first voltage state indicates that the display panel does not have a short circuit.

The short-circuit detection device 100 of the display panel provided in this embodiment includes: a power supply circuit 101, a detection circuit 102, and a processing circuit 103. It provides a power supply voltage for the display drive power supply pin of the display panel, and delays the execution of the first preset time. After that, the first voltage state of the short-circuit detection pin of the display panel is detected. If the first voltage state indicates that the display panel does not have a short-circuit, the kernel Kernel is started. This solution starts the short-circuit detection pin of the display panel immediately after EVDD is powered on The detection process realizes the seamless connection of the short-circuit detection pin detection from the Boot phase to the Kernel phase, and prevents the consequences of screen burn caused by the lack of short-circuit detection pin detection in the Boot phase.

In some embodiments, the processing circuit is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

The detection circuit is also used to detect the second voltage state of the short-circuit detection pin of the display panel;

The processing circuit is further configured to, if the second voltage state indicates that the display panel has a short circuit, control the display panel to be powered off, and add 1 to the value of the environmental variable; the value of the environmental variable is used to determine whether A power supply voltage is provided for the display driving power supply pin of the display panel.

In some embodiments, the processing circuit is also used for:

If the second voltage state indicates that the display panel does not have a short circuit, the Kernel is activated.

In some embodiments, before the supply voltage is provided for the display driving power supply pin of the display panel, the processing circuit is further configured to:

According to the value of the environmental variable, it is determined whether to provide a power supply voltage for the display driving power supply pin of the display panel.

In some embodiments, the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.

In some embodiments, the processing circuit is specifically configured to: control the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.

The short-circuit detection device of the display panel provided by any of the foregoing implementation manners is used to implement the technical solutions in any of the foregoing method embodiments, and the implementation principles and technical effects are similar, and will not be repeated here.

FIG. 9 is a schematic diagram of the hardware structure of a motherboard provided by an embodiment of the application. As shown in FIG. 9, the motherboard 200 includes:

A processor 201, a memory 202, and a computer program;

The computer program is stored in the memory 202, and the processor 201 executes the computer program to implement the short circuit detection method of the display panel described in any method embodiment.

FIG. 9 is a simple design of the motherboard. The embodiment of the present application does not limit the number of processors and memories in the motherboard. FIG. 9 only takes 1 as an example for illustration.

In some embodiments, the memory 202 may be independent or integrated with the processor 201.

When the memory 202 is independently provided, the motherboard further includes a bus 203 for connecting the memory 202 and the processor 201.

An embodiment of the present application also provides a computer-readable storage medium that stores computer-executable instructions. When the processor executes the computer-executed instructions, the above-mentioned method for short-circuit detection of the display panel is implemented .

FIG. 10 is a schematic diagram of a display device provided by an embodiment of the present application. Referring to FIG. 10, the present application also provides a display device, which includes at least: a display screen 91 configured to present image data; and a speaker 92 configured to reproduce sound data.

In some embodiments, the display device may further include a backlight assembly 94, which is located under the display screen 91. Usually some optical components are used to supply sufficient brightness and uniformly distributed light sources so that the display screen 91 can display images normally. In some related technologies, the backlight assembly may include an LED light bar or a light panel that automatically emits light.

In some embodiments, the display device may further include: a back plate 95. Generally, some convex structures are stamped on the back plate 95, and devices such as speakers 92 are fixed on the convex structures by screws or hooks.

In some embodiments, the display device may further include: a rear case 98, which is covered on the back of the display screen 91 to hide the backlight assembly 94, the speaker 92 and other display device components, which has a beautiful effect.

In some embodiments, the display device may further include: a main board 96 and a power supply board 97, which can be arranged as two boards independently, or they can be combined on one board.

In some embodiments, the display device further includes a remote control 93.

FIG. 11 is a block diagram of the hardware configuration of a display device provided by an embodiment of the present application. As shown in 11, the display device 200 may include a tuner and demodulator 220, a communicator 230, a detector 240, an external device interface 250, a controller 210, a memory 290, a user input interface, a video processor 260-1, and audio processing 260-2, display screen 280, audio input interface 272, power supply.

The tuner and demodulator 220, which receives broadcast and television signals through wired or wireless means, can perform modulation and demodulation processing such as amplification, mixing and resonance, and is used to demodulate the television channel selected by the user from multiple wireless or cable broadcast and television signals The audio and video signals carried in the frequency, and additional information (such as EPG data signals).

The tuner and demodulator 220 can be selected by the user and controlled by the controller 210 to respond to the TV channel frequency selected by the user and the TV signal carried by the frequency.

The tuner and demodulator 220 can receive signals in many ways according to different TV signal broadcasting systems, such as terrestrial broadcasting, cable broadcasting, satellite broadcasting, or Internet broadcasting; and according to different modulation types, it can be digital modulation or alternatively. Analog modulation method; and according to different types of received TV signals, analog and digital signals can be demodulated.

In some other exemplary embodiments, the tuner demodulator 220 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs TV audio and video signals through modulation and demodulation, and inputs them to the display device 200 through the input/output interface 250.

The communicator 230 is a component for communicating with external devices or external servers according to various communication protocol types. For example, the communicator 230 may include a WIFI module 231, a Bluetooth communication protocol module 232, a wired Ethernet communication protocol module 233 and other network communication protocol modules or near field communication protocol modules.

The display device 200 may establish a control signal and a data signal connection with an external control device or content providing device through the communicator 230. For example, the communicator may receive the control signal of the remote controller 100 according to the control of the controller.

The detector 240 is a component of the display device 200 for collecting signals from the external environment or interacting with the outside. The detector 240 may include a light receiver 242, a sensor used to collect the intensity of ambient light, which can adaptively display parameter changes by collecting ambient light, etc.; it may also include an image collector 241, such as a camera, a camera, etc., which can be used to collect external Environmental scenes, as well as gestures used to collect user attributes or interact with users, can adaptively change display parameters, and can also recognize user gestures to achieve the function of interaction with users.

In some other exemplary embodiments, the detector 240 may further include a temperature sensor. For example, by sensing the ambient temperature, the display device 200 may adaptively adjust the display color temperature of the image.

In some embodiments, when the temperature is relatively high, the color temperature of the display device 200 can be adjusted to be relatively cool; when the temperature is relatively low, the color temperature of the display device 200 can be adjusted to be relatively warm.

In some other exemplary embodiments, the detector 240 may also include a sound collector, such as a microphone, which may be used to receive the user's voice, including the voice signal of the user's control instruction for controlling the display device 200, or to collect environmental sound for Recognizing the environmental scene type, the display device 200 can adapt to the environmental noise.

The external device interface 250 provides a component for the controller 210 to control data transmission between the display device 200 and other external devices. The external device interface can be connected to external devices such as set-top boxes, game devices, notebook computers, etc. in a wired/wireless manner, and can receive external devices such as video signals (such as moving images), audio signals (such as music), and additional information (such as EPG). ) And other data.

Among them, the external device interface 250 may include: a high-definition multimedia interface (HDMI) terminal 251, a composite video blanking synchronization (CVBS) terminal 252, an analog or digital component terminal 253, a universal serial bus (USB) terminal 254, red, green, and blue ( RGB) terminal (not shown in the figure) and any one or more.

The controller 210 controls the work of the display device 200 and responds to user operations by running various software control programs (such as an operating system and various application programs) stored on the memory 290.

As shown in FIG. 11, the controller 210 includes a random access memory RAM 213, a read only memory ROM 214, a graphics processor 216, a CPU processor 212, a communication interface 218, and a communication bus. Among them, RAM213 and ROM214, graphics processor 216, CPU processor 212, and communication interface 218 are connected by a bus.

ROM213, used to store various system startup instructions. For example, when the power-on signal is received, the power of the display device 200 starts to start, and the CPU processor 212 runs the system start-up instruction in the ROM, and copies the operating system stored in the memory 290 to the RAM 214 to start the start-up operating system. After the operating system is started up, the CPU processor 212 copies various application programs in the memory 290 to the RAM 214, and then starts to run and start various application programs.

The graphics processor 216 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. Including an arithmetic unit, which performs operations by receiving various interactive commands input by the user, and displays various objects according to display attributes. As well as including a renderer, various objects obtained based on the arithmetic unit are generated, and the rendering result is displayed on the display screen 280.

The CPU processor 212 is configured to execute operating system and application program instructions stored in the memory 290. And according to receiving various interactive instructions input from the outside, to execute various applications, data and content, so as to finally display and play various audio and video content.

In some embodiments, the CPU processor 212 may include multiple processors. The multiple processors may include one main processor and multiple or one sub-processors. The main processor is used to perform some operations of the display device 200 in the pre-power-on mode, and/or to display images in the normal mode. Multiple or one sub-processor, used to perform an operation in the standby mode and other states.

The communication interface may include the first interface 218-1 to the nth interface 218-n. These interfaces may be network interfaces connected to external devices via a network.

The controller 210 may control the overall operation of the display device 200. For example, in response to receiving a user command for selecting a UI object to be displayed on the display screen 280, the controller 210 may perform an operation related to the object selected by the user command.

Wherein, the object may be any one of the selectable objects, such as a hyperlink or an icon. Operations related to the selected object, for example: display operations connected to hyperlink pages, documents, images, etc., or perform operations corresponding to the icon. The user command for selecting the UI object may be a command input through various input devices (for example, a mouse, a keyboard, a touch pad, etc.) connected to the display device 200 or a voice command corresponding to the voice spoken by the user.

The memory 290 includes storing various software modules for driving and controlling the display device 200. For example, various software modules stored in the memory 290 include: a basic module, a detection module, a communication module, a display control module, a browser module, and various service modules.

Among them, the basic module is the underlying software module used for signal communication between various hardware in the display device 200 and sending processing and control signals to the upper module. The detection module is a management module used to collect various information from various sensors or user input interfaces, and perform digital-to-analog conversion, analysis and management.

For example: the voice recognition module includes a voice analysis module and a voice command database module. The display control module is a module for controlling the display screen 280 to display image content, and can be used to play information such as multimedia image content and UI interfaces. The communication module is a module used for control and data communication with external devices. The browser module is a module used to perform data communication between browsing servers. The service module is a module used to provide various services and various applications.

At the same time, the memory 290 is also used to store and receive external data and user data, images of various items in various user interfaces, and visual effect diagrams of focus objects.

The user input interface 276 is used to send a user's input signal to the controller 210, or to transmit a signal output from the controller to the user. In some embodiments, the control device (for example, a mobile terminal or a remote control) can send input signals input by the user, such as a power switch signal, a channel selection signal, and a volume adjustment signal, to the user input interface, and then the user input interface 276 forwards it to the user input interface. Controller; or, the control device may receive output signals such as audio, video or data output from the user input interface processed by the controller, and display the received output signal or output the received output signal as audio or vibration.

In some embodiments, the user may input a user command on a graphical user interface (GUI) displayed on the display screen 280, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user can input a user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through the sensor to receive the user input command.

The video processor 260-1 is used to receive video signals, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to the standard codec protocol of the input signal. The video signal directly displayed or played on the display screen 280.

In some embodiments, the video processor 260-1 includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.

Among them, the demultiplexing module is used to demultiplex the input audio and video data stream. For example, if MPEG-2 is input, the demultiplexing module will demultiplex into a video signal and an audio signal.

The video decoding module is used to process the demultiplexed video signal, including decoding and scaling.

An image synthesis module, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator with the zoomed video image according to user input or itself to generate an image signal for display.

Frame rate conversion module, used to convert the frame rate of the input video, such as converting the frame rate of the input 24Hz, 25Hz, 30Hz, 60Hz video to the frame rate of 60Hz, 120Hz or 240Hz, where the input frame rate can be compared with the source The video stream is related, and the output frame rate can be related to the update rate of the display screen. The input has a usual format, such as frame insertion.

The display formatting module is used to change the signal output by the frame rate conversion module into a signal that conforms to a display format such as a display, such as format conversion of the signal output by the frame rate conversion module to output RGB data signals.

The display screen 280 is used to receive image signals input from the video processor 260-1, to display video content and images, and a menu control interface. The display screen 280 includes a display screen component for presenting a picture and a driving component for driving image display. The displayed video content can be from the video in the broadcast signal received by the tuner and demodulator 220, or from the video content input by the communicator or the interface of an external device. The display screen 280 simultaneously displays a user manipulation interface UI generated in the display device 200 and used to control the display device 200.

And, depending on the type of the display screen 280, a driving component for driving the display is also included. Alternatively, if the display screen 280 is a projection display, it may also include a projection device and a projection screen.

The audio processor 260-2 is used to receive audio signals, and perform decompression and decoding according to the standard codec protocol of the input signal, as well as audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing, and the result can be in the speaker 272 The audio signal to be played.

The audio output interface 270 is used to receive the audio signal output by the audio processor 260-2 under the control of the controller 210. The audio output interface may include a speaker 272 or output to an external audio output terminal 274 of a generator of an external device, such as : External audio terminal or headphone output terminal, etc.

In some other embodiments, the video processor 260-1 may include one or more chips. The audio processor 260-2 may also include one or more chips.

And, in some other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips, or they may be integrated with the controller 210 in one or more chips.

The power supply 275 is used to provide power supply support for the display device 200 with power input from an external power supply under the control of the controller 210. The power supply 275 may include a built-in power supply circuit installed inside the display device 200, or may be a power supply installed outside the display device 200, such as a power interface for providing an external power supply in the display device 200.

In some embodiments, the present application provides a display device, including:

The display panel is configured to present an image screen;

The speaker is configured to reproduce sound;

Power supply, configured to provide electrical energy;

The controller is configured to detect the first voltage state of the short-circuit detection pin of the display panel when the power supply supplies power to the display panel for a first preset time delay; if the first voltage state indicates If there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, the controller is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

The second voltage state of the short-circuit detection pin of the display panel is detected, and if the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

In some embodiments, the controller is further configured to control the display panel to be powered off if there is a short circuit on the display panel, and increase the value of the environmental variable by 1;

If the display panel does not have a short circuit, start the Kernel;

The value of the environmental variable is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel.

In some embodiments, the controller is further configured to determine that the short-circuit detection pin is abnormal if the short-circuit detection pin is at a high level.

In some embodiments, the controller is further configured to provide a power supply voltage for the display driving power supply pin of the display panel if the value of the environmental variable is less than or equal to a preset value.

In some embodiments, the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.

In some embodiments, the display panel is connected to the second output pin of the controller through a logic control power supply pin;

The controller is used to control the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.

For specific functions of the above-mentioned controller, reference may be made to the relevant introduction of the motherboard in the foregoing embodiment.

The application also provides a display device, including: a circuit board and a display panel; the circuit board is provided with a main control circuit;

The display panel is connected to the first output pin of the main control circuit through a display drive power supply pin, and the display panel is connected to the input pin of the main control circuit through a short-circuit detection pin; The display drive power supply pin receives the supply voltage provided by the main control circuit to control the display panel to light up; the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin is abnormal; the voltage The state includes the first voltage state;

The main control circuit is used to provide a power supply voltage for the display drive power supply pin of the display panel; and after a first preset time delay is executed, detect the first voltage state of the short-circuit detection pin of the display panel;

If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, the voltage state further includes a second voltage state;

The main control circuit is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal, and detect the second voltage of the short-circuit detection pin of the display panel status;

If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited. In some embodiments, if the second voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.

In some embodiments, if the display panel has a short circuit, the main control circuit controls the display panel to power down and adds 1 to the value of the environment variable; the value of the environment variable is used to determine whether the display panel is the display panel The display drive power supply pin provides power supply voltage;

If the display panel does not have a short circuit, then the Kernel is started.

In some embodiments, if the short-circuit detection pin is at a high level, it is determined that the short-circuit detection pin is abnormal.

In some embodiments, if the value of the environmental variable is less than or equal to the preset value, the main control circuit provides the power supply voltage for the display driving power supply pin of the display panel.

In some embodiments, the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.

In some embodiments, the display panel is connected to the second output pin of the main board through a logic control power supply pin;

The main control circuit is used to control the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.

For specific functions of the above-mentioned main control circuit, reference may be made to the related introduction of the main board in the foregoing embodiment.

A person of ordinary skill in the art can understand that all or part of the steps in the foregoing method embodiments can be implemented by a program instructing relevant hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, it executes the steps including the foregoing method embodiments; and the foregoing storage medium includes: ROM, RAM, magnetic disk, or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application range.

Claims (19)

1. A short circuit detection device for a display panel, characterized in that the device includes: a main board and a display panel;

   The display panel is connected to the first output pin of the main board through a display drive power supply pin, the display panel is connected to the input pin of the main board through a short-circuit detection pin; the display panel is driven through the display The power supply pin receives the power supply voltage provided by the motherboard to control the display panel to light up; the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin is abnormal; the voltage state includes a first voltage state ；

   The main board is used to provide a power supply voltage for the display drive power supply pins of the display panel;

   The main board is further configured to detect the first voltage state of the short-circuit detection pin of the display panel after executing the first preset time delay;

   The main board is further configured to determine that the display panel does not have a short circuit if the first voltage state indicates that the short-circuit detection pin is not abnormal.
2. The device of claim 1, wherein the voltage state further comprises a second voltage state;

   The main board is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

   The main board is also used to detect the second voltage state of the short-circuit detection pin of the display panel;

   The main board is further configured to determine that the display panel has a short circuit if the second voltage state indicates that the short-circuit detection pin is abnormal.
3. The device according to claim 2, wherein the main board is further used for:

   If the second voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.
4. The device according to any one of claims 1 to 3, wherein the main board is used for:

   If the display panel has a short circuit, control the display panel to power down and add 1 to the value of the environmental variable; the value of the environmental variable is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel ；

   If the display panel does not have a short circuit, then the Kernel is started.
5. The device according to any one of claims 1 to 3, wherein the main board is further configured to: if the short-circuit detection pin is at a high level, determine that the short-circuit detection pin is abnormal.
6. The device according to claim 4, wherein the main board is further used for:

   If the value of the environmental variable is less than or equal to the preset value, a power supply voltage is provided for the display drive power supply pin of the display panel.
7. The device according to any one of claims 1 to 3, wherein the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.
8. The device according to any one of claims 1 to 3, wherein the display panel is connected to the second output pin of the main board through a logic control power supply pin;

   The main board is used for controlling the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.
9. A method for short circuit detection of a display panel, characterized in that the method includes:

   Providing a power supply voltage for the display driving power supply pin of the display panel;

   After performing the first preset time delay, detecting the first voltage state of the short-circuit detection pin of the display panel;

   If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.
10. The method according to claim 9, wherein the method further comprises:

    If the first voltage state indicates that the short-circuit detection pin is abnormal, execute a second preset time delay;

    Detecting the second voltage state of the short-circuit detection pin of the display panel;

    If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.
11. A display device, characterized by comprising:

    The display panel is configured to present an image screen;

    The speaker is configured to reproduce sound;

    Power supply, configured to provide electrical energy;

    The controller is configured to detect the first voltage state of the short-circuit detection pin of the display panel when the power supply supplies power to the display panel for a first preset time delay; if the first voltage state indicates If there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.
12. 11. The display device of claim 11, wherein the controller is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal;

    The second voltage state of the short-circuit detection pin of the display panel is detected, and if the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.
13. 11. The display device of claim 11, wherein the controller is further configured to control the display panel to be powered off if there is a short circuit on the display panel, and increase the value of the environmental variable by 1;

    If the display panel does not have a short circuit, start the Kernel;

    The value of the environmental variable is used to determine whether to provide a power supply voltage for the display drive power supply pin of the display panel.
14. 11. The display device of claim 11, wherein the controller is further configured to determine that the short-circuit detection pin is abnormal if the short-circuit detection pin is at a high level.
15. The display device according to claim 14, wherein the controller is further configured to provide a power supply voltage for the display drive power supply pin of the display panel if the value of the environmental variable is less than or equal to a preset value .
16. 15. The display device of claim 15, wherein the first preset time is 100 milliseconds, and the second preset time is 60 milliseconds.
17. 11. The display device according to claim 11, wherein the display panel is connected to the second output pin of the controller through a logic control power supply pin;

    The controller is used to control the display drive power supply pin and the logic control power supply pin of the display panel to power down according to a preset time sequence.
18. A display device, characterized by comprising: a circuit board and a display panel; the circuit board is provided with a main control circuit;

    The display panel is connected to the first output pin of the main control circuit through a display drive power supply pin, and the display panel is connected to the input pin of the main control circuit through a short-circuit detection pin; The display drive power supply pin receives the supply voltage provided by the main control circuit to control the display panel to light up; the voltage state of the short-circuit detection pin is used to indicate whether the short-circuit detection pin is abnormal; the voltage The state includes the first voltage state;

    The main control circuit is used to provide a power supply voltage for the display drive power supply pin of the display panel; and after a first preset time delay is executed, detect the first voltage state of the short-circuit detection pin of the display panel;

    If the first voltage state indicates that there is no abnormality in the short-circuit detection pin, it is determined that there is no short-circuit in the display panel.
19. 18. The display device of claim 18, wherein the voltage state further comprises a second voltage state;

    The main control circuit is further configured to execute a second preset time delay if the first voltage state indicates that the short-circuit detection pin is abnormal, and detect the second voltage of the short-circuit detection pin of the display panel status;

    If the second voltage state indicates that the short-circuit detection pin is abnormal, it is determined that the display panel is short-circuited.

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