Display device and electronic device

Abstract

Embodiments of the present application provide a display device and an electronic device, comprising a display panel, a source driver, a timing controller, a level converter and a discharge controller. The source driver, the timing controller and the level converter are electrically connected with the display panel. The discharge controller is configured to output a discharge control signal to the display panel through the level converter when the display device is in an abnormal shutdown state, and the display panel releases charges under the control of the discharge control signal. Embodiments of the present application solve the technical problem that the display device adopting the combination architecture of the timing controller and the source driver in the prior art cannot realize the discharge of the display panel when the display device is in an abnormal shutdown state, and prevent the occurrence of display abnormalities such as display residual image and screen flicker.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device and an electronic device. BACKGROUND

[0002] At present, two driving architectures are mainly used in vehicle-mounted display devices: a TDDI (Touch and Display Driver Integration) architecture and a combination of a Tcon (Timing Controller) and a Source IC (source driver).

[0003] For a display device using the TDDI architecture, the TDDI driving chip integrates the discharge function in normal shutdown and abnormal shutdown, which can ensure the normal discharge of the display panel in the two states. However, for a display device using the combination of the Tcon and the source driver, the Tcon only supports the discharge function in normal shutdown, and the Tcon will stop working when the display device is abnormally shut down, and thus cannot perform the discharge operation, which will cause the charge in the display panel to be unable to be released in time.

[0004] The residual charge in the display panel will cause display abnormalities such as display ghosting and screen flickering, affect the display quality and service life of the display device, and reduce the user experience.

[0005] Therefore, how to ensure that the vehicle-mounted display device using the combination of the Tcon and the source driver can normally discharge when abnormally shut down is a technical problem to be solved at present. SUMMARY

[0006] An embodiment of the present application aims to provide a display device and an electronic device, and aims to solve the technical problem that the existing display device using the combination of the Tcon and the source driver cannot realize the discharge of the display panel when abnormally shut down.

[0007] An embodiment of the present application provides a display device, comprising a display panel and a driving circuit, wherein the driving circuit is electrically connected with the display panel, and the driving circuit comprises: a source driver; a timing controller; a level converter which is electrically connected with the timing controller and the source driver; and a discharge controller which is configured to output a discharge control signal when the display device is in an abnormal shutdown state; wherein 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] In the above-mentioned display device, the discharge controller includes: a timing signal input terminal; a low-level signal generating module electrically connected to the timing signal input terminal; a high-level signal generating module electrically connected to the timing signal input terminal; and an output module electrically connected to the low-level signal generating module and the high-level signal generating module, wherein the output module is configured to generate the discharge control signal according to the low-level signal output by the low-level signal generating module and the high-level signal output by the high-level signal generating module.

[0009] In the above-mentioned display device, the discharge controller also includes: a power supply module, which is electrically connected to the low-level signal generating module and the high-level signal generating module, and the power supply module is configured to provide a power supply signal to the low-level signal generating module and the high-level signal generating module when it is detected that the driving voltage signal level drops to a preset level, and the low-level signal generating module and the high-level signal generating module are configured to generate the low-level signal and the high-level signal respectively according to the power supply signal and the timing signal received by the timing signal input terminal.

[0010] In the above-mentioned display device, the high-level signal generated by the high-level signal generating module is pulled up from the third potential to the fourth potential when the driving voltage signal is reduced from the first potential to the second potential, and is reduced from the fourth potential to the fifth potential after the discharge of the display panel is completed; the low-level signal generated by the low-level signal generating module is reduced from the sixth potential to the seventh potential when the driving voltage signal is reduced from the first potential to the second potential, and is pulled up from the seventh potential to the fifth potential after the discharge of the display panel is completed.

[0011] In the above display device, the fourth potential is maintained for a time greater than or equal to 5 milliseconds, and the seventh potential is maintained for a time greater than or equal to 5 milliseconds.

[0012] In the above-mentioned display device, the display device also includes a power manager, which is electrically connected to the discharge controller and the source driver, and the power manager is configured to provide the discharge controller with the driving voltage signal whose level is reduced to a preset level when the display device is in an abnormal shutdown state.

[0013] In the above display device, 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 is in an enabled state when the display device is in an abnormal power-off state.

[0014] In the above display device, the discharge controller is electrically connected between the level converter and the display panel, and is configured to output the discharge control signal to the display panel.

[0015] In the above display device, 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.

[0016] An embodiment of the present application further provides an electronic device, comprising the above-mentioned display device.

[0017] The display device and electronic device provided by the embodiments of the present application add a discharge controller on the basis of 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 in the prior art that the display device using the combined architecture of the timing controller and the source driver cannot realize the discharge of the display panel when the display device is abnormally shut down. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2 is a schematic diagram of a first embodiment of a display device provided in the present application.

[0019] Figure 2 2 is a schematic diagram of a second embodiment of a display device provided in the present application.

[0020] Figure 3 yes Figure 1 or Figure 2 Schematic diagram of a discharge controller in a display device shown.

[0021] Figure 4 yes Figure 3 The diagram shows the relationship between the waveform of the signal generated by the high-level signal generating module in the discharge controller and the waveform of the driving voltage signal output by the power manager.

[0022] Figure 5 yes Figure 3 The diagram shows the relationship between the waveform of the signal generated by the low-level signal generating module in the discharge controller and the waveform of the driving voltage signal output by the power manager.

[0023] Figure 6 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The specific implementation methods of this application are described in detail below with reference to the accompanying drawings.

[0025] The terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise expressly limited.

[0026] The embodiments of the present application may be combined with each other.

[0027] The embodiment of the present application provides a display device, such as Figure 1 As shown, the display device includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101 and 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.

[0028] like Figure 2 As shown, the display device includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101 and 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 disposed on a printed circuit board, which is electrically connected to the display panel 101.

[0029] like Figure 3As shown, 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 end 10245, a discharge control signal output end 10246, a power supply trigger signal input end 10247, a driving voltage signal input end 10248, and an enable signal input end 10249. The low-level signal generation module 10242 is electrically connected with the timing signal input end 10245, the output module 10244, the power supply trigger signal input end 10247, and the power supply module 10243. The high-level signal generation module 10241 is electrically connected with the timing signal input end 10245, the output module 10244, the power supply trigger signal input end 10247, and the power supply module 10243. The power supply module 10243 is electrically connected with the driving voltage signal input end 10248 and the enable signal input end 10249. The output module 10244 is electrically connected with the discharge control signal output end 10246.

[0030] The working process of the display device provided by the embodiment of the present application includes the following states:

[0031] 1. Normal start-up state

[0032] When the display device is normally started (powered on), the timing controller 1021 is reset, and outputs a normal (regular) power-on signal to the level converter 1023. The level converter 1023 outputs a timing signal to the display panel 101, and the timing signal includes a clock signal, a high-level signal, a low-level signal, and a start signal, etc. The gate driver of the display panel 101 generates a scanning signal according to these signals. At the same time, the timing controller 1021 outputs an image signal to the source driver 1025, and the power manager 1022 outputs a driving voltage signal to the source driver 1025. The driving voltage signal includes a working voltage signal, a positive voltage signal, and a negative voltage signal. The display panel 101 displays a picture according to the scanning signal and the image signal. In this process, the power manager 1022 also outputs a driving voltage signal to the discharge controller 1024. The discharge controller 1024 is controlled by the driving voltage signal and / or an enable signal input from the enable signal input end 10249, and is in a disabled state.

[0033] 2. Normal shutdown state

[0034] When the display device is shut down normally, the timing controller 1021 outputs a normal (conventional) power-off signal to the level converter 1023, the level converter 1023 outputs a timing signal to the display panel 101, the source driver 1025 outputs a black screen signal (black screen insertion signal) to the display panel 101, and the display panel 101 displays a black screen. Finally, the power manager 1022 is turned off and no longer outputs a driving voltage signal to the source driver 1025, nor does it output a high level signal and a low level signal to the level converter 1023. During this process, the discharge controller 1024 is controlled by the driving voltage signal and / or the enable signal input by the enable signal input terminal 10249 and is in an inactive state.

[0035] 3. Abnormal shutdown state

[0036] When the display device is abnormally shut down, the timing controller 1021 stops working. Figure 3 As shown, the power trigger signal input terminal 10247 triggers the discharge controller 1024 to start. After receiving the driving voltage signal output by the power manager 1022 and the level of which is reduced to a preset level, the power module 10243 outputs a power signal to the low-level signal generating module 10242 and the high-level signal generating module 10241. Driven by the power signal and the power trigger signal input terminal 10247, the low-level signal generating module 10242 and the high-level signal generating 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 by the timing signal input terminal 10245. The output module 10244 generates a discharge control signal based on these low-level and high-level signals and directly outputs it to the display panel 101 (as shown in FIG. 1 ). Figure 1 ), or output to the display panel 101 through the level converter 1023 (such as Figure 2 embodiment shown).

[0037] like Figure 4 As shown, 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 generating module 10241 is pulled up from the third potential 403 to the fourth potential 404, and then decreased from the fourth potential 404 to the fifth potential 405.

[0038] like Figure 5 As shown, 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 generating module 10242 decreases from the sixth potential 501 to the seventh potential 502, and then increases from the seventh potential 502 to the fifth potential 405.

[0039] The display device of the embodiment of the present application can adopt two different implementations to implement the output of the discharge control signal:

[0040] The first implementation method is as follows Figure 1 As shown, the discharge controller 1024 is directly disposed on the display panel 101 , and the discharge controller 1024 is electrically connected to the level converter 1023 .

[0041] The second embodiment is as follows Figure 2 As shown, the discharge controller 1024 is disposed on a printed circuit board, and the discharge controller 1024 outputs a discharge control signal to the display panel 101 through the level converter 1023 .

[0042] In the above two embodiments, the internal structure and working principle of the discharge controller 1024 are the same. Figure 3 As shown, the power module 10243 of the discharge controller 1024 receives the driving voltage signal output by the power manager 1022 via the driving voltage signal input terminal 10248. When the display device is in an abnormal shutdown state, the level of the driving voltage signal drops to a preset level. At this time, the power module 10243 detects this change and immediately 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 begin operation after receiving the power signal and the power trigger signal inputted from the power trigger signal input terminal 10247. These two modules also receive a timing signal via the timing signal input terminal 10245 and generate a low-level signal and a high-level signal, respectively, based on the timing signal. The output module 10244 receives these two signals and generates a final discharge control signal based on them.

[0043] like Figure 4 and Figure 5 As shown, the waveforms of the low-level signal and the high-level signal exhibit specific variation patterns. When the driving voltage signal decreases from the first potential 401 to the second potential 402, indicating that the display device is in an abnormal shutdown state, the high-level signal first rises from the third potential 403 to the fourth potential 404, and then decreases to the fifth potential 405 after a discharge process lasting greater than or equal to 5 milliseconds. The low-level signal first decreases from the sixth potential 501 to the seventh potential 502, and then increases to the eighth potential 503 after a discharge process lasting greater than or equal to 5 milliseconds. The eighth potential 503 is equal to the fifth potential 405.

[0044] The display device provided in the embodiments of this application can be applied to a variety of in-vehicle display products, such as in-vehicle central control display modules, in-vehicle instrument display modules, in-vehicle streaming media rearview mirrors, in-vehicle driving recorders, etc. These products all use a driving architecture that combines a timing controller 1021 with a source driver 1025. The discharge controller 1024 provided in the embodiments of this application can effectively solve the discharge problem of the display panel 101 during abnormal shutdown of such products, thereby improving the display quality and reliability of the products.

[0045] The display device provided in the embodiment of the present application realizes controllable discharge of the display panel 101 by adding a discharge controller 1024 and configuring the discharge controller 1024 to generate and output a discharge control signal in an abnormal shutdown state, thereby effectively preventing the occurrence of display anomalies such as display afterimages and screen flickering.

[0046] like Figure 1 As shown, the first embodiment of the display device provided by the present application includes a display panel 101 and a driving circuit 102. The driving circuit 102 is electrically connected to the display panel 101 and 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 the timing controller 1021 and the source driver 1025, and the discharge controller 1024 is electrically connected to the level shifter 1023 and the gate driver of the display panel 101.

[0047] 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 is provided with m×n pixel units arranged in an array, where m and n are integers greater than 1. The non-display area is located around the display area and is used to arrange driving circuits and various signal lines. The display panel 101 also includes a plurality of scan lines, a plurality of data lines and a gate driver. The plurality of scan lines extend along a first direction and are arranged along a second direction, and the plurality of data lines extend along a second direction and are arranged along the first direction, and the first direction is perpendicular to the second direction. The gate driver is provided in the non-display area and is electrically connected to the plurality of scan lines. The source driver 1025 is electrically connected to the plurality of data lines through a flexible circuit board. The timing controller 1021 is electrically connected to the gate driver and the source driver 1025, respectively.

[0048] The display panel 101 comprises 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 comprises 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 a pixel electrode disposed on the passivation layer. The first metal layer comprises scan lines, gate electrodes and the like. The second metal layer comprises data lines, source electrodes, drain electrodes and the like. The counter substrate comprises 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.

[0049] Each pixel unit comprises at least one thin film transistor and a pixel electrode. The gate of the thin film transistor is electrically connected to a corresponding scan line, the source is electrically connected to a corresponding data line, and the drain is electrically connected to a corresponding pixel electrode. When the scan line outputs a high-level scan signal, the thin film transistor is turned on, and the data signal on the data line is transmitted to the pixel electrode through the thin film transistor; when the scan line outputs a low-level scan signal, the thin film transistor is turned off, and the pixel electrode maintains the voltage corresponding to the data signal.

[0050] The gate driver comprises n-stage gate drive units connected in cascade, and each stage of the gate drive units is electrically connected to a scan line. The gate drive units sequentially output scan signals under the control of the timing controller 1021 to scan the pixel units in each row of the display area row by row. The source driver 1025 can be an integrated circuit chip, which comprises a plurality of digital-to-analog conversion units, and is configured to convert digital image signals (image data) into analog voltage signals under the control of the timing controller 1021 and output the analog voltage signals to the data lines of the display panel 101. The timing controller 1021 is configured to receive and process externally input image data and timing signals, and drive the gate driver and the source driver 1025. The power manager 1022 is configured to provide working voltages for each part of the liquid crystal display panel 101, including providing a common voltage for the common electrode, providing a gate drive voltage for the gate driver, providing a gamma voltage for the source driver 1025, and the like.

[0051] The timing controller 1021 is configured to provide driving signals to the gate driver and the source driver 1025 of the display panel 101 in a normal boot state, and is configured to control the display panel 101 to release charges through the gate driver and the source driver 1025 in a normal shutdown state.

[0052] The discharge controller 1024 is configured to output a discharge control signal to the display panel 101 when the display device is in an abnormal shutdown state.

[0053] 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 discharge the electric charge under the control of the discharge control signal, specifically, discharge the electric charge in the pixel unit of the display panel 101.

[0054] In the 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.

[0055] Specifically, in the normal boot state, the timing controller 1021 first generates a plurality of clock signals and a start signal, which are output to the gate driver of the display panel 101 after level conversion by the level converter 1023, and the gate driver generates scanning signals according to the signals, which are used to open the thin film transistors of each row of pixel units in turn. At the same time, the timing controller 1021 processes the input image data and outputs it to the source driver 1025, and the digital-to-analog conversion unit of the source driver 1025 converts the received digital image signal into a corresponding analog voltage signal, and writes the analog voltage signal into the corresponding pixel unit when the gate driver opens the thin film transistor of a certain row of pixel units.

[0056] In the normal shutdown state, the timing controller 1021 first controls the source driver 1025 to output a black screen voltage signal, i.e. to charge all pixel units with a black screen voltage, and then controls the gate driver to open the thin film transistors of each row of pixel units in turn, so that the electric charge in the pixel units can be discharged through the data line. The discharge process in the normal shutdown state is controlled, which can ensure that the electric charge in the display panel 101 is completely discharged.

[0057] In the abnormal shutdown state, the timing controller 1021 stops working due to the loss of working power supply, and at this time the discharge controller 1024 takes over the discharge control operation of the display panel 101. The discharge controller 1024 generates a discharge control signal containing high and low level signals according to the pre-set discharge timing, and the signals are output to the gate driver of the display panel 101 after conversion by the level converter 1023, so that the gate driver can still open the thin film transistor of the pixel unit when the display device is abnormally shut down, thereby realizing the discharge of the display panel 101, i.e. making the gate driver still maintain the minimum working capacity without the driving of the timing controller 1021, thereby opening the thin film transistor of the pixel unit and realizing the emergency discharge of the display panel 101. Although the emergency discharge is not as accurate as the discharge process in the normal shutdown state, it can ensure that most of the electric charge is discharged and prevent display abnormalities.

[0058] As Figure 3As shown, the discharge controller 1024 includes a timing signal input end 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.

[0059] The low-level signal generation module 10242 is electrically connected to the timing signal input end 10245.

[0060] The high-level signal generation module 10241 is electrically connected to the timing signal input end 10245.

[0061] The power supply module 10243 is electrically connected to the low-level signal generation module 10242 and the high-level signal generation module 10241. When a decrease in the driving voltage signal level to a preset level is detected, the power supply module 10243 provides a power supply 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 are configured to generate a low-level signal and a high-level signal, respectively, according to the power supply signal and the timing signal received by the timing signal input end 10245.

[0062] 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 according to 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.

[0063] The low-level signal generation module 10242 is an analog circuit composed of an operational amplifier and a voltage comparator, including a signal sampling unit, a level adjustment unit, and an output driving unit. The signal sampling unit is used to sample the timing signal input by the timing signal input end 10245, the level adjustment unit is used to dynamically adjust the output level according to the sampling result, and the output driving unit is used to provide sufficient driving capability to ensure stable output of the low-level signal. The high-level signal generation module 10241 is also implemented as an analog circuit composed of an operational amplifier and a voltage comparator, and also includes a signal sampling unit, a level adjustment unit, and an output driving unit. The structure of the signal sampling unit and the output driving unit is the same as that of the low-level signal generation module 10242, but the level adjustment unit uses a different reference voltage source, in which the reference voltage source provides a positive voltage as a reference level.

[0064] 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 that monitors the level changes of the drive voltage signal in real time. When the 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 that controls the operating state of the power conversion unit based on the monitoring results. The power conversion unit is a DC-DC converter circuit that converts the input drive voltage signal into the operating voltage required by the low-level signal generation module 10242 and the high-level signal generation module 10241.

[0065] Output module 10244 is a signal synthesis circuit composed of multiple operational amplifiers, including a signal selection unit, a level synthesis unit, and an output buffer unit. The signal selection unit alternately selects low-level and high-level signals according to preset timing requirements. The level synthesis unit synthesizes the selected signals, and the output buffer unit provides sufficient driving capability to ensure that the discharge control signal can be transmitted to the display panel 101.

[0066] like Figure 4 As shown, the high-level signal generated by the high-level signal generating 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 is decreased from the fourth potential 404 to the fifth potential 405 after the discharge of the display panel 101 is completed.

[0067] like Figure 5 As shown, the low-level signal generated by the low-level signal generating 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 is pulled up from the seventh potential 502 to the eighth potential 503 after the discharge of the display panel 101 is completed. The eighth potential is equal to the fifth potential 405.

[0068] The fifth potential 405 is the ground potential (GND), and the discharge time of the display panel 101 is greater than or equal to 5 milliseconds. That is, the maintenance time of the fourth potential 404 is greater than or equal to 5 milliseconds, and the maintenance time of the seventh potential 502 is greater than or equal to 5 milliseconds.

[0069] The display device further 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 a driving voltage signal whose level is reduced to a preset level to the discharge controller 1024 when the display device is in an abnormal shutdown state.

[0070] The discharge controller 1024 is in a disabled state when the display device is in a normal power-on state or a normal power-off state, and is in an enabled state when the display device is in an abnormal power-off state. Disabling means not working or disabled; enabling means being triggered to work or enabled.

[0071] During normal startup and shutdown, discharge controller 1024 remains in a disabled state under the control of an enable control signal. This disconnects the power supply signals to each functional module, minimizing power consumption. Upon detecting an abnormal shutdown signal, an enable control signal activates power module 10243, causing discharge controller 1024 to enter an enabled state and begin discharging control operations.

[0072] In normal startup and normal shutdown states, the discharge controller 1024 is disabled by an enable control signal, which is fixed at a low level by a pull-up resistor to prevent the discharge controller 1024 from being enabled by mistake.

[0073] During abnormal shutdown, when it is detected that the driving voltage signal drops to a preset level, the discharge controller 1024 first unlocks the enable control signal, then activates the internal clock generator, and then enables the power supply of each functional module in turn.

[0074] In addition, the display device provided in the embodiments of the present application further includes a temperature sensor and an analog-to-digital converter, and the discharge controller 1024 further includes a compensation control module. The temperature sensor is used to monitor the temperature of the operating environment in real time. The analog-to-digital converter is used to convert the analog temperature signal output by the temperature sensor into a digital signal. The compensation control module is used to retrieve corresponding compensation parameters from a pre-stored lookup table based on the current operating environment temperature value. The compensation parameters are used to adjust the level and timing parameters of the discharge control signal.

[0075] For example, when the ambient temperature is in the range of -40°C to 0°C, since the low temperature will cause the response speed of the display panel 101 to slow down, the compensation control module increases the fourth potential 404 of the high-level signal from 10V to 12V and extends the signal holding time from 5ms to 8ms to ensure sufficient discharge. When the ambient temperature is in the range of 0°C to 40°C, the discharge control signal maintains the standard parameters unchanged. When the ambient temperature is in the range of 40°C to 80°C, the compensation control module reduces the fourth potential 404 of the high-level signal to 8V and shortens the signal holding time to 3ms to prevent excessive discharge from damaging the display panel 101.

[0076] The compensation method for low-level signals is similar to that for high-level signals: within the -40°C to 0°C range, the seventh potential 502 is reduced from -10V to -12V, and the hold time is extended to 8ms. Within the 40°C to 80°C range, the seventh potential 502 is increased to -8V, and the hold time is shortened to 3ms. This technical solution ensures that the display device maintains stable discharge performance under different temperature conditions. This is particularly important for in-vehicle display devices, as the temperature range of the vehicle environment is relatively wide.

[0077] like Figure 2 As shown, the first embodiment of the display device provided in this application is similar to the above-mentioned first embodiment, except that:

[0078] In this embodiment, the discharge controller 1024 is electrically connected between the timing controller 1021 and the level converter 1023 . The discharge controller is configured to output the discharge control signal to the display panel 101 through the level converter 1023 .

[0079] The level shifter 1023 is electrically connected to the display panel 101 , the timing controller 1021 , and the source driver 1025 .

[0080] The discharge controller 1024 is electrically connected to the timing controller 1021 and the level converter 1023. When the display device is in an abnormal shutdown state, the discharge controller 1024 is configured to output a discharge control signal to the display panel 101 via the level converter 1023. The level converter 1023 is used to convert the level of the discharge control signal and output it to the display panel 101.

[0081] The output module 10244 is configured to generate a discharge control signal according to the low-level signal output by the low-level signal generating module 10242 and the high-level signal output by the high-level signal generating module 10241 , and output the discharge control signal to the display panel 101 through the level converter 1023 .

[0082] In normal working state, the discharge controller 1024 is also used to receive configuration data sent by the timing controller 1021 to adjust the discharge parameters; in abnormal shutdown state, the timing controller 1021 stops working, and the discharge controller 1024 is used to generate a discharge control signal according to the discharge parameters.

[0083] like Figure 6 As shown, an embodiment of the present application further provides an electronic device including a display device. The electronic device may be, for example, a mobile phone, a television, a laptop, a monitor, a tablet computer, etc.

[0084] The display device and electronic device provided by the embodiments of the present application are configured to add a discharge controller 1024 to the display panel 101, the source driver 1025 and the timing controller 1021, and configure the discharge controller 1024 to output a discharge control signal to the display panel 101 when the display device 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 in the prior art that the display device using the combined architecture of the timing controller 1021 and the source driver 1025 cannot realize the discharge of the display panel 101 when the display device is abnormally shut down.

[0085] In addition, the discharge controller 1024 of the display device and electronic device provided in the embodiments of the present application is in a disabled state in the normal power-on state and the normal power-off state, and is only enabled in the abnormal power-off state, ensuring that the discharge controller 1024 does not interfere with the normal operation of the display device, while being able to play a role in time during abnormal power-off.

[0086] Through the above technical solution, the display device and electronic device provided by the embodiments of the present application can release the charge in the display panel 101 in a timely and reliably manner during abnormal shutdown, effectively preventing the occurrence of display anomalies such as display afterimages and screen flickering, and improving the display quality and service life of the display device.

[0087] The above is a detailed introduction to the embodiments of the present application. The contents of this specification should not be understood as limiting the scope of protection of the present application.

Claims

1. A display device, characterized in that: The device comprises a display panel and a driving circuit, wherein the driving circuit is electrically connected to the display panel and comprises: Source driver; 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; The discharge controller comprises: Timing signal input terminal; A low-level signal generating module, electrically connected to the timing signal input terminal; A high-level signal generating module, electrically connected to the timing signal input terminal; a power supply module electrically connected to the low-level signal generating module and the high-level signal generating module, the power supply module being configured to provide a power supply signal to the low-level signal generating module and the high-level signal generating module when detecting that the driving voltage signal decreases from a level to a preset level; and an output module, electrically connected to the low-level signal generating module and the high-level signal generating module, the output module being configured to generate the discharge control signal according to the low-level signal output by the low-level signal generating module and the high-level signal output by the high-level signal generating module; The high-level signal generated by the high-level signal generating module is pulled up from the third potential to the fourth potential when the driving voltage signal decreases from the first potential to the second potential, and is decreased from the fourth potential to the fifth potential after the discharge of the display panel is completed; The low-level signal generated by the low-level signal generating module decreases from a sixth potential to a seventh potential when the driving voltage signal decreases from the first potential to the second potential, and increases from the seventh potential to the fifth potential after the display panel finishes discharging.

2. The display device according to claim 1, wherein The low-level signal generating module and the high-level signal generating module are configured to generate the low-level signal and the high-level signal respectively according to the power signal and the timing signal received by the timing signal input terminal.

3. The display device according to claim 1, wherein The fourth potential is maintained for a time greater than or equal to 5 milliseconds, and the seventh potential is maintained for a time greater than or equal to 5 milliseconds.

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

5. 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 is in an enabled state when the display device is in an abnormal power-off state.

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

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

8. An electronic device, characterized in that: The device comprises the display device according to any one of claims 1 to 7.

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