Display device and electronic device

Abstract

Embodiments of the present application provide a display device and an electronic device. The display device comprises a display panel, a source driver, a timing controller, a level shifter, and a discharge controller. The discharge controller is configured to output a discharge control signal to the display panel by means of the level shifter when the display device is in an abnormal shutdown state, and the display panel releases electric charges under the control of the discharge control signal. The embodiments of the present application solve the technical problem that discharging of a display panel cannot be achieved when a display device using a timing controller-source driver architecture is abnormally shut down.

Description

Display devices and electronic devices Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and an electronic device. Background Technology

[0002] Currently, automotive display devices mainly adopt two driving architectures: TDDI (Touch and Display Driver Integration) architecture and the architecture combining Tcon (Timing Controller) and Source IC (Source Driver).

[0003] For display devices using the TDDI architecture, the TDDI driver chip integrates discharge functions for both normal and abnormal shutdown, ensuring that the display panel discharges normally in both states. However, for display devices using a combination of timing controller and source driver architecture, the timing controller only supports discharge during normal shutdown. The timing controller stops working when the display device is abnormally shut down and cannot perform the discharge operation, thus causing the charge in the display panel to fail to be released in a timely manner.

[0004] Residual charge inside the display panel can cause display abnormalities such as image retention and screen flickering, affecting the display quality and lifespan of the display device and reducing the user experience.

[0005] Therefore, ensuring that in-vehicle display devices using a combination of timing controllers and source drivers can discharge normally during abnormal shutdown is a technical problem that urgently needs to be solved. Invention Overview

[0006] The purpose of the embodiments of this application is to provide a display device and an electronic device that aims to solve the technical problem that existing display devices using a combination of timing controller and source driver architecture cannot discharge the display panel during abnormal shutdown.

[0007] Embodiments of this application provide a display device, including a display panel and a driving circuit. The driving circuit is electrically connected to the display panel and includes: a source driver; a timing controller; a level converter electrically connected to the timing controller and the source driver; and a discharge controller configured to output a discharge control signal when the display device is in an abnormal shutdown state. The driving circuit is configured to output the discharge control signal to the display panel, and the display panel is configured to release charge under the control of the discharge control signal.

[0008] Embodiments of this application also provide an electronic device, including the above-described display device. Beneficial effects

[0009] The display device and electronic device provided in the embodiments of this application add a discharge controller to the display panel, source driver and timing controller, and configure the discharge controller to output a discharge control signal to the display panel when the display device is in an abnormal shutdown state, so that the display panel can release charge under the control of the discharge control signal, thereby solving the technical problem that the display device using the combination architecture of timing controller and source driver in the prior art cannot realize the discharge of the display panel when abnormally shut down. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the first embodiment of the display device provided in this application.

[0011] Figure 2 is a schematic diagram of a second embodiment of the display device provided in this application.

[0012] Figure 3 is a schematic diagram of the discharge controller in the display device shown in Figure 1 or Figure 2.

[0013] Figure 4 is a schematic diagram showing the relationship between the waveform of the signal generated by the high-level signal generation module in the discharge controller shown in Figure 3 and the waveform of the drive voltage signal output by the power manager.

[0014] Figure 5 is a schematic diagram showing the relationship between the waveform of the signal generated by the low-level signal generation module in the discharge controller shown in Figure 3 and the waveform of the drive voltage signal output by the power manager.

[0015] Figure 6 is a schematic diagram of an electronic device provided in an embodiment of this application. Embodiments of the present invention

[0016] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0017] The terms “first,” “second,” and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms “multiple,” and similar words mean two or more, unless otherwise expressly specified.

[0018] The embodiments of this application can be combined with each other.

[0019] An embodiment of this application provides a display device 10, as shown in FIG1. ​​The display device 10 includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101. The driving circuit 102 includes a timing controller 1021, a source driver 1025, a power manager 1022, a level shifter 1023, and a discharge controller 1024. The power manager 1022 is electrically connected to the source driver 1025, the timing controller 1021, the discharge controller 1024, and the level shifter 1023. The timing controller 1021 is electrically connected to the level shifter 1023 and the display panel 101. The level shifter 1023 is electrically connected to the discharge controller 1024. The discharge controller 1024 is electrically connected to the display panel 101. The timing controller 1021, the power manager 1022, and the level shifter 1023 are all disposed on a printed circuit board, which is electrically connected to the display panel 101. The discharge controller 1024 is disposed on the display panel 101.

[0020] As shown in Figure 2, the display device 10 includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101. The driving circuit 102 includes a timing controller 1021, a source driver 1025, a power manager 1022, a level shifter 1023, and a discharge controller 1024. The power manager 1022 is electrically connected to the source driver 1025, the timing controller 1021, the discharge controller 1024, and the level shifter 1023. The timing controller 1021 is electrically connected to the discharge controller 1024, the level shifter 1023, and the display panel 101. The discharge controller 1024 is electrically connected to the level shifter 1023, and the level shifter 1023 is electrically connected to the display panel 101. The timing controller 1021, the power manager 1022, the level shifter 1023, and the discharge controller 1024 are all mounted on a printed circuit board, which is electrically connected to the display panel 101.

[0021] As shown in Figure 3, the discharge controller 1024 includes a low-level signal generation module 10242, a high-level signal generation module 10241, an output module 10244, a power supply module 10243, a timing signal input terminal 10245, a discharge control signal output terminal 10246, a power trigger signal input terminal 10247, a drive voltage signal input terminal 10248, and an enable signal input terminal 10249. The low-level signal generation module 10242 is electrically connected to the timing signal input terminal 10245, the output module 10244, the power trigger signal input terminal 10247, and the power module 10243. The high-level signal generation module 10241 is electrically connected to the timing signal input terminal 10245, the output module 10244, the power trigger signal input terminal 10247, and the power module 10243. The power module 10243 is electrically connected to the drive voltage signal input terminal 10248 and the enable signal input terminal 10249. The output module 10244 is electrically connected to the discharge control signal output terminal 10246.

[0022] The operation of the display device 10 provided in the embodiments of this application includes the following states:

[0023] 1. Normal power-on state

[0024] When the display device 10 is normally started (powered on), the timing controller 1021 resets and outputs a normal (conventional) power-on signal to the level converter 1023. The level converter 1023 outputs timing signals to the display panel 101, including clock signals, high-level signals, low-level signals, and start signals. The gate driver of the display panel 101 generates scan signals based on these signals. Simultaneously, the timing controller 1021 outputs image signals to the source driver 1025, and the power manager 1022 outputs drive voltage signals to the source driver 1025. These drive voltage signals include operating voltage signals, positive voltage signals, and negative voltage signals. The display panel 101 displays the image based on the scan signals and image signals. During this process, the power manager 1022 also outputs drive voltage signals to the discharge controller 1024. The discharge controller 1024 is controlled by the drive voltage signals and / or the enable signal input at the enable signal input terminal 10249 and is in a disabled state.

[0025] 2. Normal shutdown state

[0026] When the display device 10 is normally powered off, the timing controller 1021 outputs a normal (conventional) power-down signal to the level converter 1023. The level converter 1023 outputs a timing signal to the display panel 101, and the source driver 1025 outputs a black screen signal (black screen signal) to the display panel 101. The display panel 101 displays a black screen. Finally, the power manager 1022 is turned off and no longer outputs a drive voltage signal to the source driver 1025, nor does it output high-level or low-level signals to the level converter 1023. During this process, the discharge controller 1024 is controlled by the drive voltage signal and / or the enable signal input terminal 10249 and is in a disabled state.

[0027] 3. Abnormal shutdown state

[0028] When the display device 10 is abnormally shut down, the timing controller 1021 stops working. As shown in Figure 3, the power trigger signal input terminal 10247 triggers the discharge controller 1024 to start. After receiving the drive voltage signal output by the power manager 1022, which has been reduced to a preset level, the power module 10243 outputs a power signal to the low-level signal generation module 10242 and the high-level signal generation module 10241. Driven by the power signal and the power trigger signal from the power trigger signal input terminal 10247, the low-level signal generation module 10242 and the high-level signal generation module 10241 generate the low-level signal and high-level signal required for the discharge of the display panel 101 according to the timing signal received from the timing signal input terminal 10245. The output module 10244 generates a discharge control signal based on these low-level signal and high-level signal and outputs it directly to the display panel 101 (as shown in the embodiment in Figure 1), or outputs it to the display panel 101 through the level converter 1023 (as shown in the embodiment in Figure 2).

[0029] As shown in Figure 4, when the driving voltage signal decreases from the first potential 401 to the second potential 402, the high-level signal generated by the high-level signal generation module 10241 is pulled up from the third potential 403 to the fourth potential 404, and then decreases from the fourth potential 404 to the fifth potential 405.

[0030] As shown in Figure 5, when the driving voltage signal decreases from the first potential 401 to the second potential 402, the low-level signal generated by the low-level signal generation module 10242 decreases from the sixth potential 501 to the seventh potential 502, and then rises from the seventh potential 502 to the fifth potential 405.

[0031] The display device 10 of the embodiments of this application can implement the output of the discharge control signal in two different ways:

[0032] As shown in Figure 1, in the first embodiment, the discharge controller 1024 is directly mounted on the display panel 101 and is electrically connected to the level converter 1023.

[0033] The second embodiment is shown in Figure 2. The discharge controller 1024 is mounted on the printed circuit board. The discharge controller 1024 outputs a discharge control signal to the display panel 101 through the level converter 1023.

[0034] In both embodiments described above, the internal structure and working principle of the discharge controller 1024 are the same. As shown in Figure 3, the power module 10243 of the discharge controller 1024 receives the drive voltage signal output by the power manager 1022 through the drive voltage signal input terminal 10248. When the display device 10 is in an abnormal shutdown state, the level of the drive voltage signal will drop to a preset level. At this time, the power module 10243 detects this change and then outputs a power signal to the low-level signal generation module 10242 and the high-level signal generation module 10241. The low-level signal generation module 10242 and the high-level signal generation module 10241 start working after receiving the power signal and the power trigger signal input terminal 10247. These two modules also receive a timing signal through the timing signal input terminal 10245 and generate a low-level signal and a high-level signal respectively according to the timing signal. The output module 10244 receives these two signals and generates the final discharge control signal according to these two signals.

[0035] As shown in Figures 4 and 5, the waveforms of the low-level and high-level signals exhibit specific changing patterns. When the driving voltage signal decreases from the first potential 401 to the second potential 402, it indicates that the display device 10 is in an abnormal shutdown state. The high-level signal first rises from the third potential 403 to the fourth potential 404, and after a discharge process lasting 5 milliseconds or more, it decreases to the fifth potential 405. Conversely, the low-level signal first decreases from the sixth potential 501 to the seventh potential 502, and after a discharge process lasting 5 milliseconds or more, it rises to the eighth potential 503. The eighth potential 503 is equal to the fifth potential 405.

[0036] The display device 10 provided in the embodiments of this application can be applied to various in-vehicle display products, such as in-vehicle central control display modules, in-vehicle instrument display modules, in-vehicle streaming rearview mirrors, and in-vehicle dashcams. These products all adopt a driving architecture combining a timing controller 1021 and a source driver 1025. Through the discharge controller 1024 provided in the embodiments of this application, the discharge problem of the display panel 101 during abnormal shutdown of these products can be effectively solved, thereby improving the display quality and reliability of the products.

[0037] The display device 10 provided in the embodiments of this application adds a discharge controller 1024 and configures the discharge controller 1024 to generate and output a discharge control signal in an abnormal shutdown state, thereby realizing the controllable discharge of the display panel 101 and effectively preventing display abnormalities such as display ghosting and screen flickering.

[0038] As shown in Figure 1, a first embodiment of the display device 10 provided in this application includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101. The driving circuit 102 includes a source driver 1025, a timing controller 1021, a level shifter 1023, and a discharge controller 1024. The source driver 1025 is electrically connected to the display panel 101, the timing controller 1021 is electrically connected to the display panel 101, the level shifter 1023 is electrically connected to both the timing controller 1021 and the source driver 1025, and the discharge controller 1024 is electrically connected to both the level shifter 1023 and the gate driver of the display panel 101.

[0039] The display panel 101 may be, for example, a liquid crystal display panel 101. The display panel 101 includes a display area and a non-display area. The display area has an array of m×n pixel units, where m and n are integers greater than 1. The non-display area is located around the periphery of the display area and is used to arrange driving circuits and various signal lines. The display panel 101 also includes multiple scan lines, multiple data lines, and a gate driver. The multiple scan lines extend along a first direction and are arranged along a second direction, and the multiple data lines extend along the second direction and are arranged along the first direction, with the first direction perpendicular to the second direction. The gate driver is located in the non-display area and is electrically connected to the multiple scan lines. The source driver 1025 is electrically connected to the multiple data lines via a flexible circuit board. The timing controller 1021 is electrically connected to both the gate driver and the source driver 1025.

[0040] Display panel 101 includes a thin-film transistor array substrate, a counter substrate, and a liquid crystal layer disposed between the two substrates. The thin-film transistor array substrate includes a glass substrate, a first metal layer disposed on the glass substrate, a gate insulating layer disposed on the first metal layer, a semiconductor layer disposed on the gate insulating layer, a second metal layer disposed on the semiconductor layer, a passivation layer disposed on the second metal layer, and pixel electrodes disposed on the passivation layer. The first metal layer includes scan lines, gate electrodes, etc. The second metal layer includes data lines, source electrodes, drain electrodes, etc. The counter substrate includes a glass substrate, a black matrix disposed on the glass substrate, a color filter layer disposed on the black matrix, and a common electrode disposed on the color filter layer.

[0041] Each pixel unit includes at least one thin-film transistor (TFT) and a pixel electrode. The gate of the TFT is electrically connected to the corresponding scan line, the source is electrically connected to the corresponding data line, and the drain is electrically connected to the corresponding pixel electrode. When the scan line outputs a high-level scan signal, the TFT is turned on, and the data signal on the data line is transmitted to the pixel electrode through the TFT; when the scan line outputs a low-level scan signal, the TFT is turned off, and the pixel electrode maintains the voltage corresponding to the data signal.

[0042] The gate driver includes n cascaded gate driving units, each electrically connected to a scan line. Under the control of the timing controller 1021, the gate driving units sequentially output scan signals, scanning each row of pixel units in the display area line by line. The source driver 1025 can be an integrated circuit chip, which includes multiple digital-to-analog conversion units. Under the control of the timing controller 1021, the source driver 1025 converts digital image signals (image data) into analog voltage signals and outputs them to the data lines of the display panel 101. The timing controller 1021 receives and processes externally input image data and timing signals, and drives the gate driver and source driver 1025. The power manager 1022 provides operating voltages to various parts of the liquid crystal display panel 101, including providing a common voltage for the common electrode, a gate driving voltage for the gate driver, and a gamma voltage for the source driver 1025.

[0043] The timing controller 1021 is used to provide drive signals to the gate driver and source driver 1025 of the display panel 101 in the normal power-on state, and to control the display panel 101 to release charge through the gate driver and source driver 1025 in the normal power-off state.

[0044] The discharge controller 1024 is configured to output a discharge control signal to the display panel 101 when the display device 10 is in an abnormal shutdown state.

[0045] The driving circuit 102 is configured to output the discharge control signal to the display panel 101, and the display panel 101 is configured to release charge under the control of the discharge control signal, specifically, to release the charge in the pixel units of the display panel 101.

[0046] In this embodiment, the discharge controller 1024 is electrically connected between the level converter 1023 and the display panel 101, and the discharge controller 1024 is configured to output the discharge control signal to the display panel 101.

[0047] Specifically, in the normal power-on state, the timing controller 1021 first generates multiple clock signals and start signals. These signals are then level-converted by the level converter 1023 and output to the gate driver of the display panel 101. The gate driver generates scan signals based on these signals, which are used to sequentially turn on the thin-film transistors of each row of pixel units. Simultaneously, the timing controller 1021 processes the input image data and outputs it to the source driver 1025. The digital-to-analog converter unit of the source driver 1025 converts the received digital image signals into corresponding analog voltage signals, and writes these analog voltage signals into the corresponding pixel units when the gate driver turns on the thin-film transistors of a certain row of pixel units.

[0048] In the normal power-off state, the timing controller 1021 first controls the source driver 1025 to output a black screen voltage signal, that is, to charge all pixel units with the black screen voltage. Then, it controls the gate driver to sequentially turn on the thin-film transistors of each row of pixel units, so that the charge in the pixel units can be released through the data lines. This discharge process during normal power-off is controlled, which can ensure that the charge in the display panel 101 is completely released.

[0049] In the abnormal shutdown state, the timing controller 1021 stops working due to the loss of power. At this time, the discharge controller 1024 takes over the discharge control operation of the display panel 101. The discharge controller 1024 generates discharge control signals containing high and low level signals according to a preset discharge sequence. These signals are converted by the level converter 1023 and output to the gate driver of the display panel 101. This allows the gate driver to still open the thin-film transistors of the pixel units when the display device 10 is abnormally shut down, thereby achieving discharge of the display panel 101. That is, it allows the gate driver to maintain minimum operating capability even without the timing controller 1021, thereby opening the thin-film transistors of the pixel units and achieving emergency discharge of the display panel 101. Although this emergency discharge is not as precise as the discharge process during normal shutdown, it ensures that most of the charge is released, preventing display abnormalities.

[0050] As shown in Figure 3, the discharge controller 1024 includes a timing signal input terminal 10245, a low-level signal generation module 10242, a high-level signal generation module 10241, a power supply module 10243, and an output module 10244.

[0051] The low-level signal generation module 10242 is electrically connected to the timing signal input terminal 10245.

[0052] The high-level signal generation module 10241 is electrically connected to the timing signal input terminal 10245.

[0053] The power supply module 10243 is electrically connected to the low-level signal generation module 10242 and the high-level signal generation module 10241. The power supply module 10243 is configured to provide a power signal to the low-level signal generation module 10242 and the high-level signal generation module 10241 when the drive voltage signal level is detected to drop to a preset level. The low-level signal generation module 10242 and the high-level signal generation module 10241 are configured to generate a low-level signal and a high-level signal respectively based on the power supply signal and the timing signal received by the timing signal input terminal 10245.

[0054] The output module 10244 is electrically connected to the low-level signal generation module 10242 and the high-level signal generation module 10241. The output module 10244 is configured to generate a discharge control signal based on the low-level signal output by the low-level signal generation module 10242 and the high-level signal output by the high-level signal generation module 10241, and output the discharge control signal to the display panel 101.

[0055] The low-level signal generation module 10242 is an analog circuit composed of an operational amplifier and a voltage comparator, including a first signal sampling unit, a first level adjustment unit, and a first output drive unit. The first signal sampling unit samples the timing signal input to the timing signal input terminal 10245. The first level adjustment unit dynamically adjusts the output level based on the sampling result. The first output drive unit provides sufficient drive capability to ensure stable output of the low-level signal. The reference voltage source of the first level adjustment unit provides a negative voltage as a reference level. The high-level signal generation module 10241 is also implemented using an analog circuit composed of an operational amplifier and a voltage comparator, and also includes a second signal sampling unit, a second level adjustment unit, and a second output drive unit. The structures of the second signal sampling unit and the second output drive unit are the same as those of the first signal sampling unit and the first output drive unit of the low-level signal generation module 10242, but the second level adjustment unit uses a different reference voltage source, which provides a positive voltage as a reference level.

[0056] The power module 10243 includes a voltage detection unit, a power conversion unit, and a power control unit. The voltage detection unit is a voltage comparator circuit used to monitor the level changes of the drive voltage signal in real time. When the detected level of the drive voltage signal drops to a preset level, it triggers the power control unit. The power control unit is a digital control circuit used to control the operating state of the power conversion unit based on the monitoring results. The power conversion unit is a DC-DC conversion circuit used to convert the input drive voltage signal into a first drive voltage for the low-level signal generation module 10242 and a second drive voltage for the high-level signal generation module 10241 under the control of the power control unit.

[0057] The output module 10244 is a signal synthesis circuit composed of multi-stage operational amplifiers, including a signal selection unit, a level synthesis unit, and an output buffer unit. The signal selection unit alternately selects low-level signals and high-level signals according to preset timing requirements. The level synthesis unit synthesizes the selected signals into a discharge control signal. The output buffer unit provides sufficient driving capability to output the discharge control signal, ensuring that the discharge control signal can be transmitted to the display panel 101.

[0058] As shown in Figure 4, the high-level signal generated by the high-level signal generation module 10241 is pulled up from the third potential 403 to the fourth potential 404 when the driving voltage signal decreases from the first potential 401 to the second potential 402, and then decreases from the fourth potential 404 to the fifth potential 405 after the display panel 101 finishes discharging.

[0059] As shown in Figure 5, the low-level signal generated by the low-level signal generation module 10242 decreases from the sixth potential 501 to the seventh potential 502 when the driving voltage signal decreases from the first potential 401 to the second potential 402, and then rises from the seventh potential 502 to the eighth potential 503 after the display panel 101 finishes discharging. The eighth potential is equal to the fifth potential 405.

[0060] The fifth potential 405 is the ground potential (GND). The duration of the discharge of the display panel 101 is greater than or equal to 5 milliseconds. That is, the duration of the fourth potential 404 is greater than or equal to 5 milliseconds, and the duration of the seventh potential 502 is greater than or equal to 5 milliseconds.

[0061] The display device 10 also includes a power manager 1022, which is electrically connected to the discharge controller 1024 and the source driver 1025. The power manager 1022 is configured to provide the discharge controller 1024 with a drive voltage signal whose level is reduced to a preset level when the display device 10 is in an abnormal shutdown state.

[0062] The discharge controller 1024 is in a disabled state when the display device 10 is in a normal power-on state and a normal power-off state, and in an enabled state when the display device 10 is in an abnormal power-off state. Disabled means not working or disabled; enabled means triggered to work or enabled.

[0063] Under normal power-on and power-off conditions, the discharge controller 1024 remains in a disabled state under the control of the enable control signal. At this time, the power signals of each functional module are turned off, and power consumption is reduced to a minimum. After detecting an abnormal power-off signal, the enable control signal activates the power module 10243, enabling the discharge controller 1024 to enter the enabled state and begin executing discharge control operations.

[0064] During normal power-on and power-off states, the enable control signal ensures that the discharge controller 1024 is in a disabled state. The enable control signal is fixed at a low level by a pull-up resistor to prevent the discharge controller 1024 from being accidentally enabled.

[0065] In the event of an abnormal shutdown, when the drive voltage signal is detected to drop to a preset level, the discharge controller 1024 first unlocks the enable control signal, then activates the internal clock generator, and then sequentially enables the power supply to each functional module.

[0066] Furthermore, the display device 10 provided in the embodiments of this application also includes a temperature sensor and an analog-to-digital converter, and the discharge controller 1024 also includes a compensation control module. The temperature sensor is used to monitor the temperature of the working environment in real time. The analog-to-digital converter is used to convert the analog signal of the temperature value output by the temperature sensor into a digital signal. The compensation control module is used to obtain the corresponding compensation parameters from a pre-stored lookup table according to the current temperature value of the working environment. The compensation parameters are used to adjust the level and timing parameters of the discharge control signal.

[0067] For example, when the ambient temperature is between -40°C and 0°C, the low temperature slows down the response speed of the display panel 101. The compensation control module raises the high-level signal potential from the fourth potential 404 (10V) to the eighth potential (12V) and extends the holding time of the potential from the first duration (5ms) to the second duration (8ms) to ensure sufficient discharge. When the ambient temperature is between 0°C and 40°C, the discharge control signal maintains its standard parameters. When the ambient temperature is between 40°C and 80°C, the compensation control module lowers the high-level signal potential from the fourth potential 404 to the ninth potential (8V) and shortens the holding time of the potential to the third duration (3ms) to prevent over-discharge from damaging the display panel 101.

[0068] The compensation method for low-level signals is similar to that for high-level signals: within the range of -40℃ to 0℃, the seventh potential 502 (-10V) is reduced to the tenth potential (-12V), and the holding time of the potential is extended to the second duration (8ms); within the range of 40℃ to 80℃, the seventh potential 502 is increased to the eleventh potential (-8V), and the holding time of the potential is shortened to the third duration (3ms). This technical solution ensures that the display device 10 maintains stable discharge performance under different temperature conditions. This is particularly important for automotive display devices because the temperature variation range of the automotive environment is large.

[0069] As shown in Figure 2, the second embodiment of the display device 10 provided in this application is similar to the first embodiment described above, except that:

[0070] In this embodiment, the discharge controller 1024 is electrically connected between the timing controller 1021 and the level converter 1023, and the discharge controller is configured to output the discharge control signal to the display panel 101 through the level converter 1023.

[0071] The level converter 1023 is electrically connected to the display panel 101, the timing controller 1021, and the source driver 1025.

[0072] The discharge controller 1024 is electrically connected to the timing controller 1021 and the level converter 1023. The discharge controller 1024 is configured to output a discharge control signal to the display panel 101 via the level converter 1023 when the display device 10 is in an abnormal shutdown state. The level converter 1023 is used to convert the level of the discharge control signal and output it to the display panel 101.

[0073] The output module 10244 is configured to generate a discharge control signal based on the low-level signal output by the low-level signal generation module 10242 and the high-level signal output by the high-level signal generation module 10241, and output the discharge control signal to the display panel 101 through the level converter 1023.

[0074] Under normal operating conditions, the discharge controller 1024 is also used to receive configuration data sent by the timing controller 1021 to adjust the discharge parameters; under abnormal shutdown conditions, the timing controller 1021 stops working, and the discharge controller 1024 is used to generate a discharge control signal according to the discharge parameters.

[0075] As shown in Figure 6, an embodiment of this application also provides an electronic device 60, which includes a display device 10 and a housing 601. The electronic device 60 may be, for example, an in-vehicle display device, a mobile phone, a television, a laptop computer, a monitor, a tablet computer, etc.

[0076] The display device 10 and electronic device 60 provided in the embodiments of this application add a discharge controller 1024 to the display panel 101, source driver 1025 and timing controller 1021, and configure the discharge controller 1024 to output a discharge control signal to the display panel 101 when the display device 10 is in an abnormal shutdown state, so that the display panel 101 can release charge under the control of the discharge control signal, thereby solving the technical problem that the display device 10 using the combination architecture of timing controller 1021 and source driver 1025 in the prior art cannot realize the discharge of display panel 101 when abnormal shutdown.

[0077] Furthermore, the discharge controller 1024 of the display device 10 and electronic device 60 provided in the embodiments of this application is in a disabled state during normal power-on and normal power-off states, and is only enabled during abnormal power-off states, ensuring that the discharge controller 1024 does not interfere with the normal operation of the display device 10, while also being able to play its role in a timely manner during abnormal power-off states.

[0078] Through the above technical solutions, the display device 10 and electronic device 60 provided in the embodiments of this application can release the charge in the display panel 101 in a timely and reliable manner when the device is abnormally powered off, effectively preventing display abnormalities such as display ghosting and screen flickering, and improving the display quality and service life of the display device 10.

[0079] The embodiments of this application have been described in detail above. The content of this specification should not be construed as limiting the scope of protection of this application.

Claims

1. A display device, the display device comprising a display panel and a driving circuit, the driving circuit being electrically connected to the display panel, the driving circuit comprising: Source driver; Timing controller; A level converter, electrically connected to the timing controller and the source driver; as well as A discharge controller, configured to output a discharge control signal when the display device is in an abnormal shutdown state; The driving circuit is configured to output the discharge control signal to the display panel, and the display panel is configured to release charge under the control of the discharge control signal.

2. The display device according to claim 1, wherein, The discharge controller includes: Timing signal input terminal; A low-level signal generation module is electrically connected to the timing signal input terminal; A high-level signal generation module is electrically connected to the timing signal input terminal; and An output module is electrically connected to the low-level signal generation module and the high-level signal generation module. The output module is configured to generate the discharge control signal based on the low-level signal output by the low-level signal generation module and the high-level signal output by the high-level signal generation module.

3. The display device according to claim 2, wherein, The low-level signal generation module includes a first signal sampling unit, a first level adjustment unit, and a first output driving unit. The first signal sampling unit is configured to sample the timing signal input at the timing signal input terminal. The first level adjustment unit is configured to dynamically adjust the output level according to the sampling result. The first output driving unit is configured to output the low-level signal. The first level adjustment unit includes a reference voltage source that provides a negative voltage as a reference level.

4. The display device according to claim 2, wherein, The high-level signal generation module includes a second signal sampling unit, a second level adjustment unit, and a second output driving unit. The second signal sampling unit is configured to sample the timing signal input at the timing signal input terminal. The second level adjustment unit is configured to dynamically adjust the output level according to the sampling result. The second output driving unit is configured to output the high-level signal. The second level adjustment unit includes a reference voltage source that provides a positive voltage as a reference level.

5. The display device according to claim 2, wherein, The discharge controller further includes: A power supply module is electrically connected to the low-level signal generation module and the high-level signal generation module. The power supply module is configured to provide a power signal to the low-level signal generation module and the high-level signal generation module when the driving voltage signal level is detected to drop to a preset level. The low-level signal generation module and the high-level signal generation module are configured to generate the low-level signal and the high-level signal respectively based on the power supply signal and the timing signal received at the timing signal input terminal.

6. The display device according to claim 5, wherein, The power module includes: A voltage detection unit is configured to monitor level changes of the drive voltage signal; A power control unit is configured to control a power conversion unit based on the monitoring results of the voltage detection unit; and The power conversion unit is configured to convert the drive voltage signal into a first drive voltage of the low-level signal generation module and a second drive voltage of the high-level signal generation module under the control of the power control unit.

7. The display device according to claim 2, wherein, The output module includes: The signal selection unit is configured to select the low-level signal and the high-level signal according to preset timing requirements; A level synthesis unit is configured to synthesize the selected signal into the discharge control signal; and The output buffer unit is configured to output the discharge control signal.

8. The display device according to claim 2, wherein, The high-level signal generated by the high-level signal generation module is raised from the third potential to the fourth potential when the driving voltage signal decreases from the first potential to the second potential, and decreases from the fourth potential to the fifth potential after the display panel discharges. The low-level signal generated by the low-level signal generation module decreases from the sixth potential to the seventh potential when the driving voltage signal decreases from the first potential to the second potential, and then rises from the seventh potential to the fifth potential after the display panel discharges.

9. The display device according to claim 8, wherein, The duration of the fourth potential is greater than or equal to 5 milliseconds, and the duration of the seventh potential is greater than or equal to 5 milliseconds.

10. The display device according to claim 9, wherein, The discharge controller is also configured to receive configuration data sent by the timing controller to adjust the discharge parameters in normal operation, and to generate the discharge control signal according to the discharge parameters in abnormal shutdown state.

11. The display device according to claim 1, wherein, The display device further includes a power manager, which is electrically connected to the discharge controller and the source driver. The power manager is configured to provide the discharge controller with a drive voltage signal whose level is reduced to a preset level when the display device is in an abnormal shutdown state.

12. The display device according to claim 1, wherein The discharge controller is in a disabled state when the display device is in a normal power-on state and a normal power-off state, and the discharge controller is in an enabled state when the display device is in an abnormal power-off state.

13. The display device of claim 1, wherein, The discharge controller is electrically connected between the level converter and the display panel, and the discharge controller is configured to output the discharge control signal to the display panel.

14. The display device of claim 1, wherein, The discharge controller is electrically connected between the timing controller and the level converter, and the discharge controller is configured to output the discharge control signal to the display panel through the level converter.

15. The display device of claim 1, wherein, The display device further includes: A temperature sensor is configured to monitor the temperature of the working environment; An analog-to-digital converter is configured to convert an analog signal of the temperature value output by the temperature sensor into a digital signal; and The compensation control module is configured to retrieve compensation parameters from a pre-stored lookup table based on the temperature value of the current working environment. The compensation parameters are configured to adjust the level and timing parameters of the discharge control signal.

16. The display device of claim 15, wherein, When the ambient temperature is within the range of -40℃ to 0℃, the compensation control module is configured to raise the potential of the high-level signal from the fourth potential to the eighth potential, and extend the holding time of the potential from the first duration to the second duration.

17. The display device of claim 15, wherein, When the ambient temperature is in the range of 40°C to 80°C, the compensation control module is configured to reduce the potential of the high-level signal from the fourth potential to the ninth potential and shorten the holding time of the potential to the third duration.

18. The display device of claim 15, wherein, When the ambient temperature is in the range of -40℃ to 0℃, the compensation control module is configured to reduce the potential of the low-level signal from the seventh potential to the tenth potential and extend the holding time of the potential to the second duration.

19. The display device of claim 15, wherein, When the ambient temperature is in the range of 40°C to 80°C, the compensation control module is configured to raise the potential of the low-level signal from the seventh potential to the eleventh potential and shorten the holding time of the potential to the third duration.

20. An electronic device comprising a display device as claimed in any one of claims 1 to 19.

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