WO2021138778A1 - 显示面板的控制方法及装置 - Google Patents

显示面板的控制方法及装置 Download PDF

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Publication number
WO2021138778A1
WO2021138778A1 PCT/CN2020/070533 CN2020070533W WO2021138778A1 WO 2021138778 A1 WO2021138778 A1 WO 2021138778A1 CN 2020070533 W CN2020070533 W CN 2020070533W WO 2021138778 A1 WO2021138778 A1 WO 2021138778A1
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WO
WIPO (PCT)
Prior art keywords
display
display panel
discharge
driving circuit
circuit
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Application number
PCT/CN2020/070533
Other languages
English (en)
French (fr)
Inventor
王春华
于洁
李鹏涛
王遥遥
王晓霞
赵铁磊
秦树林
李蒙
历伟
张阳阳
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2020/070533 priority Critical patent/WO2021138778A1/zh
Priority to CN202080000003.9A priority patent/CN113366564A/zh
Publication of WO2021138778A1 publication Critical patent/WO2021138778A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a method and device for controlling a display panel.
  • a liquid crystal display panel generally includes an array substrate and a color filter substrate that are opposed to each other, and a liquid crystal layer provided between the array substrate and the color filter substrate.
  • LCD liquid crystal display panel
  • voltages are applied to the pixel electrodes on the array substrate and the common electrodes on the color filter substrate to control the deflection of liquid crystal molecules.
  • the present disclosure provides a control method of a display panel, including:
  • the display panel When it is determined that the shutdown instruction is acquired, the display panel is driven to display a discharge screen; wherein the voltage of the display data corresponding to the discharge screen is not greater than the voltage corresponding to the preset gray scale.
  • the driving the display panel to display the discharge screen specifically includes:
  • the display panel is driven to display the discharge picture in consecutive N display frames; wherein, N is an integer and 10 ⁇ N ⁇ 30.
  • the driving the display panel to display the discharge screen in consecutive N display frames specifically includes:
  • the display panel is driven to display the discharge screen in consecutive N display frames.
  • the driving the display panel to display the discharge screen in consecutive N display frames specifically includes:
  • the display panel is driven to display the discharge picture in consecutive N display frames.
  • N 20.
  • the display panel is a display panel in a normally black mode, and the preset gray level is 10 gray levels.
  • the gray scale of the display data corresponding to the discharge screen is 0 gray scale.
  • the display panel is a display panel in a normally white mode
  • the preset gray level is a gray level value obtained by subtracting 10 gray levels from the highest gray level corresponding to the display panel.
  • the gray level of the display data corresponding to the discharge screen is the highest gray level.
  • the display panel includes a plurality of pixels, and the gray scale of the display data of each pixel corresponding to the discharge screen is the same.
  • control circuit of the display panel configured to determine in real time whether a shutdown instruction is acquired; when determining that the shutdown instruction is acquired, drive the display panel to display a discharge screen; wherein, the The voltage of the display data corresponding to the discharge screen is not greater than the preset voltage.
  • the display device provided by the embodiment of the present disclosure includes a display panel and the above-mentioned control circuit of the display panel.
  • the display panel includes: a display driving circuit, a plurality of sub-pixels arranged in an array, a plurality of gate lines, and a plurality of data lines; wherein, the display driving circuit is connected to the respective sub-pixels.
  • the gate line and each of the data lines are electrically connected; a row of the sub-pixels is correspondingly electrically connected to at least one gate line, and a column of sub-pixels is correspondingly electrically connected to at least one data line;
  • the control circuit is electrically connected to the display drive circuit
  • the control circuit is specifically configured to provide display data corresponding to the discharge screen to the display driving circuit when it is determined that the shutdown instruction is acquired;
  • the display driving circuit is configured to drive the display panel to display the discharge screen according to the received display data corresponding to the discharge screen.
  • the display device further includes: a current-limiting protection circuit; the current-limiting input end of the current-limiting protection circuit is electrically connected to the high-voltage input port, and the current-limiting protection circuit is electrically connected to the high-voltage input port.
  • the current output terminal is electrically connected to the receiving port of the display driving circuit;
  • the current limiting protection circuit is configured to limit the current flowing between the high voltage input port and the receiving port of the display driving circuit
  • the display driving circuit is configured to control the gate driving circuit to apply a high voltage signal to each of the gate lines, so that the thin film transistors in each of the sub-pixels in the display panel are turned on for discharge.
  • the current-limiting protection circuit includes: a current-limiting resistor
  • the first end of the current limiting resistor is electrically connected to the high voltage input port, and the second end of the current limiting resistor is electrically connected to the receiving port of the display driving circuit.
  • the current limiting protection circuit is configured to output the voltage of the high voltage input port as the high voltage signal when the voltage of the high voltage input port is less than a high voltage threshold.
  • the current limiting protection circuit is configured to output the voltage of the high voltage input port as the high voltage signal when the voltage of the high voltage input port is less than a high voltage threshold.
  • the display drive circuit when the voltage of the high voltage input port is not less than the high voltage threshold, output the high voltage threshold to the display drive circuit;
  • the current-limiting protection circuit includes: a Zener diode; wherein the high voltage threshold is the critical reverse breakdown voltage of the Zener diode;
  • the anode of the Zener diode is electrically connected to the ground terminal, and the cathode of the Zener diode is electrically connected to the receiving port of the display driving circuit.
  • the embodiment of the present disclosure also provides a readable non-transitory storage medium, the readable non-transitory storage medium stores executable instructions of a display panel, and the executable instructions are configured to execute the control method of the above display panel. step.
  • the embodiments of the present disclosure also provide a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the above-mentioned display panel when the computer program is executed. Steps of the control method.
  • FIG. 1 is a flowchart of a control method provided by an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of the structure of some display panels provided by the embodiments of the present disclosure.
  • FIG. 3 is a schematic diagram of the structure of a control circuit and a display panel provided by an embodiment of the disclosure
  • FIG. 4a is a schematic structural diagram of a display device provided by an embodiment of the disclosure.
  • 4b is a schematic diagram of a specific structure of a display device provided by an embodiment of the disclosure.
  • FIG. 5 is a schematic diagram of other specific structures of the display device provided by the embodiments of the disclosure.
  • FIG. 6 is a schematic diagram of further specific structures of the display device provided by the embodiments of the disclosure.
  • a liquid crystal display (Liquid Crystal Display, LCD) generally includes an array substrate and a color filter substrate that are opposed to each other, and a liquid crystal layer provided between the array substrate and the color filter substrate.
  • LCD liquid crystal Display
  • the pixel electrode is electrically connected to a thin film transistor (TFT), and when the TFT is turned on, the pixel electrode can be made to input a voltage corresponding to the display data.
  • TFT thin film transistor
  • a liquid crystal display panel is used in a display device, and the display device is electrically connected to an external power source to provide power through the external power source.
  • the external power supply provides a driving voltage signal to the liquid crystal display panel through the power management circuit to make the liquid crystal display panel work normally.
  • the driving voltage signal is usually input, such as: logic and analog driving voltage signal VDD, gate high voltage signal VGH to control TFT to turn on, gate low voltage signal VGL to control TFT to turn off, liquid crystal drive The high voltage signal VSP and the liquid crystal drive low voltage signal VSN.
  • a certain shutdown sequence is also required to control the output of the above-mentioned driving voltage signal. For example, first stop the liquid crystal driving high voltage signal VSP and the liquid crystal driving low voltage signal VSN, then stop the gate high voltage signal VGH and the gate low voltage signal VGL, and then stop the logic and analog driving voltage signal VDD. However, if the input driving voltage signal is not turned off according to the above sequence, it will cause abnormal power failure of the LCD.
  • the logic and analog drive voltage signal VDD then passes through the voltage conversion circuit to generate the gate high voltage signal VGH, gate low voltage signal VGL, liquid crystal drive high voltage signal VSP, and liquid crystal drive low voltage signal VSN. If the display device executes a shutdown command, the logic and analog drive voltage signal VDD may become 0, resulting in failure to control the LCD drive The sequence of the high voltage signal VSP, the liquid crystal drive low voltage signal VSN, the gate high voltage signal VGH, and the gate low voltage signal VGL.
  • the liquid crystal driving high voltage signal VSP, the liquid crystal driving low voltage signal VSN, the gate high voltage signal VGH, and the gate low voltage signal VGL may disappear at the same time, resulting in an abnormal power failure of the LCD.
  • the LCD is abnormally powered down, because the charge stored in the pixel electrode cannot be effectively released, the charge will remain. In this way, after the LCD panel is normally powered on, the screen will flicker.
  • the control method of the display panel provided by the embodiment of the present disclosure, as shown in FIG. 1, may include the following steps:
  • step S10 It is judged in real time whether the shutdown instruction is obtained; wherein, if it is judged that the shutdown instruction is obtained, step S20 is executed. If it is determined that the shutdown instruction is not obtained, step S30 is executed.
  • the control method of the display panel judges whether a shutdown instruction is acquired in real time, and when it is determined that the shutdown instruction is acquired, the display panel is driven to display a discharge screen. In this way, the shutdown command can be monitored in real time, so that when the shutdown command is received, the display panel is driven to display the discharge screen in time, so that the amount of charge in the sub-pixels is discharged. Therefore, after the display panel is normally powered on, the problem of screen flicker can be effectively improved, and the user's viewing experience can be greatly improved.
  • the display panel in the embodiment of the present disclosure may be a liquid crystal display panel.
  • the display panel 350 may include a plurality of pixel units PX, a plurality of gate lines 110, and a plurality of data lines 120; wherein a row of sub-pixels is correspondingly electrically connected to at least one gate line, and a column of sub-pixels is correspondingly electrically connected to at least one Data line.
  • Each pixel unit PX includes a plurality of sub-pixels 130. Wherein, the sub-pixels 130 are arrayed in the display area of the display panel.
  • Each sub-pixel 130 includes a pixel electrode 131 and a thin-film transistor (TFT) 132.
  • TFT thin-film transistor
  • one row of sub-pixels is correspondingly electrically connected to one gate line
  • one column of sub-pixels is correspondingly electrically connected to one data line.
  • the gate of the TFT in a row of sub-pixels is electrically connected to a gate line
  • the source of the TFT in a column of sub-pixels is electrically connected to a data line
  • the drain of the TFT in each sub-pixel is electrically connected to the pixel electrode.
  • the TFT can be turned on under the control of the signal transmitted on the gate line to turn on the pixel electrode and the data line.
  • the specific structure of the liquid crystal display panel may be basically the same as that in the related art, and will not be repeated here.
  • the pixel unit may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel. In this way, red, green and blue can be mixed to achieve color display.
  • the pixel unit may also include red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels. In this way, red, green, blue and white can be mixed to achieve color display.
  • the light-emitting color of the sub-pixels in the pixel unit can be designed and determined according to the actual application environment, which is not limited here.
  • the display panel in the embodiments of the present disclosure can be applied to mobile terminals, such as mobile phones, notebook computers, tablet computers, televisions, and so on.
  • these mobile terminals will be equipped with a power management device, which can receive the input voltage of the external power supply through the port, and after converting the voltage input to the power management device, the display is displayed through the output port of the power management device.
  • Panel power supply Generally, when the mobile terminal is to be shut down, the pass will trigger the shutdown instruction.
  • a laptop computer has a shutdown function key. When the shutdown function key is clicked with a mouse, a shutdown command will be generated, and the laptop computer can execute the shutdown procedure.
  • the shutdown instruction in the embodiment of the present disclosure may include a shutdown instruction triggered when the mobile terminal is shut down.
  • the display panel in the embodiment of the present disclosure can also be applied to vehicle-mounted display products. Since vehicle-mounted display products are generally installed in the vehicle, the power management device of the vehicle is generally used for power supply. In practical applications, the power management device can receive the input voltage of the external power supply through the port, convert the voltage input to the power management device, and then supply power to the display panel through the output port of the power management device. Generally, a virtual or physical switch button is set on the vehicle display product, and pressing the switch button will turn the vehicle display product on and off. The switch button on the key car display product will trigger a shutdown command when the car display product is controlled to shut down, so that the car display product can be shut down.
  • the shutdown instruction in the embodiment of the present disclosure may include: a shutdown instruction triggered when a switch button on the vehicle display product is pressed.
  • a power management circuit is provided in a display device. Because the external power source passes through the power management circuit to generate the logic and analog drive voltage signal VDD, the logic and analog drive voltage signal VDD then passes through the voltage conversion circuit to generate the gate high voltage signal VGH and the gate Low voltage signal VGL, liquid crystal drive high voltage signal VSP and liquid crystal drive low voltage signal VSN, so that the gate high voltage signal VGH, gate low voltage signal VGL, liquid crystal drive high voltage signal VSP and liquid crystal drive low voltage signal VSN can be provided To supply power to the display panel. After the above shutdown command is generated, the external power supply will not be turned off directly.
  • the power management circuit will also input the voltage of the external power supply, so that the power management circuit will generate the logic and analog driving voltage signal VDD, and will also make the voltage conversion circuit Generate a gate high voltage signal VGH, a gate low voltage signal VGL, a liquid crystal drive high voltage signal VSP, and a liquid crystal drive low voltage signal VSN. In this way, when the display device executes the shutdown command, there will be a voltage input.
  • the display panel can be controlled to display multiple frames of the discharge screen when the shutdown command is received, which can effectively reduce the charge of the pixel electrode in the sub-pixel to a further effective The amount of charge of the sub-pixel is discharged.
  • driving the display panel to display the discharge image in consecutive N display frames may specifically include: driving the display panel in the consecutive N display frames according to the display data corresponding to the pre-stored discharge image The discharge screen is displayed.
  • the display data corresponding to the discharge screen can be pre-stored in the memory, so that when the display panel is controlled to display the discharge screen, the stored display data can be used directly, thereby reducing the amount of calculation.
  • driving the display panel to display the discharge image in consecutive N display frames may also specifically include:
  • the display panel is driven to display the discharge screen in consecutive N display frames.
  • the display data corresponding to the discharge screen can be generated, so that the display data corresponding to the discharge screen can be determined according to the actual application environment.
  • general display panels have different refresh frequencies, for example, 30 Hz, 60 Hz, 120 Hz, and other refresh frequencies, which can also be adapted to display panels with higher refresh frequencies.
  • the display panel can be driven to display a dark picture in 10 consecutive display frames, so that it can be adapted to a display panel with a lower refresh frequency.
  • the display panel can be driven to display a dark picture in 30 consecutive display frames, which can be adapted to display panels with most refresh frequencies.
  • N can also be designed and determined according to the actual application environment, which is not limited here.
  • Grayscale generally divides the brightness change between the darkest and the brightest into several parts to facilitate screen brightness control.
  • the displayed image is generally composed of many pixels. Usually each pixel is composed of three sub-pixels of red, green and blue, which can show many different colors, and each sub-pixel can show different brightness levels. .
  • the gray scale represents the gradation level of different brightness from the darkest to the brightest. The more intermediate levels there are, the more delicate the picture effects that can be presented.
  • a 6-bit display panel or an 8-bit display panel is generally used to realize image display. Among them, an 8-bit display panel can express 256 brightness levels, that is, it has 256 gray levels and these gray levels are 0-255 gray levels.
  • the 6-bit panel can display 64 brightness levels, that is, it has 64 gray levels and these gray levels are 0-63 gray levels.
  • a general display panel may have a display panel in a normally black mode and a display panel in a normally white mode.
  • the display panel in the normally black mode displays a lower-brightness picture when the gray scale is lower, and displays a higher-brightness picture when the gray scale is higher.
  • the display panel in the normally white mode displays a lower-brightness picture at a lower gray level, and displays a brighter picture at a higher gray level.
  • the display panel may be set to a display panel in a normally black mode.
  • the preset gray scale may be set to 10 gray scales.
  • the voltage of the display data corresponding to the discharge screen is not greater than the voltage corresponding to 10 gray scales, so that the brightness of the discharge screen can be darker.
  • the amount of charge input to the pixel electrode in the sub-pixel can also be reduced, thereby achieving the effect of reducing the amount of charge in the pixel electrode, and thereby achieving the discharge effect.
  • 0 gray scale corresponds to the darkest picture, and its corresponding display data voltage is the smallest.
  • the discharge picture can be set to correspond to the The gray scale of the displayed data is 0 gray scale.
  • the discharge screen can be the darkest screen, so that the amount of charge input to the pixel electrode in the sub-pixel can be minimized, and the effect of reducing the amount of charge in the pixel electrode can be further realized, thereby realizing the discharge effect.
  • the display panel can be set as a normally white display panel.
  • the preset gray level can be the highest gray level GN max corresponding to the display panel minus 10 gray levels
  • the latter gray scale value that is, the default gray scale is (GN max -10) gray scale value.
  • the voltage of the display data corresponding to the discharge screen is not greater than the voltage corresponding to the grayscale value of (GN max -10), which can reduce the amount of charge input to the pixel electrode in the sub-pixel, thereby achieving the effect of reducing the amount of charge in the pixel electrode , And then achieve the discharge effect.
  • the highest gray level corresponds to the brightest picture, and the voltage of its corresponding display data is the smallest.
  • the discharge picture can be set to correspond to the The gray level of the displayed data is the highest gray level.
  • the discharge screen can be the brightest screen, so that the amount of charge input to the pixel electrode in the sub-pixel can be minimized, and the effect of reducing the amount of charge in the pixel electrode can be further realized, thereby realizing the discharge effect.
  • the gray scale of the display data of each pixel unit corresponding to the discharge image can be made the same. In this way, the display data corresponding to the discharge screen can be more unified, so that the calculation amount of the voltage for generating the display data corresponding to the discharge screen can be reduced, and the power consumption can be reduced.
  • embodiments of the present disclosure also provide a control circuit for a display panel, as shown in FIG. 3, wherein the control circuit 10 is configured to determine in real time whether a shutdown instruction is acquired; when it is determined that the shutdown instruction is acquired , The display panel 350 is driven to display the discharge screen; wherein the voltage of the display data corresponding to the discharge screen is not greater than the preset voltage.
  • control circuit may be configured in the form of an embodiment combining software and hardware.
  • control circuit may be configured as an integrated circuit (IC).
  • IC integrated circuit
  • an embodiment of the present disclosure also provides a display device, as shown in FIGS. 4a and 4b, including a display panel 350 and the control circuit 10 of the above-mentioned display panel provided by the embodiment of the present disclosure.
  • the principle of the display device to solve the problem is similar to that of the control circuit of the aforementioned display panel. Therefore, the implementation of the display device can refer to the implementation of the aforementioned control circuit of the display panel, and the repetitive parts will not be repeated here.
  • the display panel in the embodiment of the present disclosure may be a liquid crystal display panel.
  • the liquid crystal display panel may include: an array substrate and a counter substrate arranged oppositely, a liquid crystal layer encapsulated between the array substrate and the counter substrate, and a flexible printed circuit (FPC) bound to the array substrate, Display drive circuit electrically connected with FPC.
  • the array substrate is provided with multiple gate lines, multiple data lines, pixel electrodes and TFTs located in the sub-pixels
  • the counter substrate is provided with a color film layer and a common electrode.
  • the display driving circuit may include: a timing controller, a gate driving circuit, and a source driving circuit; the gate driving circuit is electrically connected to each gate line, and the source driving circuit is electrically connected to each data line.
  • the timing controller may input a frame trigger signal and a clock signal to the gate driving circuit according to the signal of the normal display screen, so that the gate driving circuit inputs the gate scanning signal to the gate line row by row, so as to turn on the gate line by line TFT in the sub-pixel.
  • the data voltage is also input to the source drive circuit, and the data voltage corresponding to the normal display screen can be input to each data line, so that when the TFT in each row of sub-pixels is turned on, the sub-pixels can be turned on.
  • the pixel electrode in the pixel can input the data voltage corresponding to the normal display image, so that the display panel can display the normal image.
  • the display panel in the embodiment of the present disclosure may be an organic light emitting diode (OLED) display panel.
  • the OLED display panel may include an array substrate and a counter substrate that are arranged oppositely, a flexible printed circuit (FPC) bound to the display panel, and a display drive circuit electrically connected to the FPC.
  • FPC flexible printed circuit
  • multiple gate lines, multiple data lines, OLEDs and pixel driving circuits located in sub-pixels may be provided on the array substrate.
  • the pixel driving circuit may include a TFT and a storage capacitor.
  • the display driving circuit may include: a timing controller, a gate driving circuit, and a source driving circuit; the gate driving circuit is electrically connected to each gate line, and the source driving circuit is electrically connected to each data line.
  • the timing controller may input a frame trigger signal, a clock signal, etc. to the gate drive circuit according to the signal of the normal display screen, so that the gate drive circuit inputs the gate scanning signal to the gate line row by row, so as to turn on row by row. TFT in the sub-pixel.
  • the data voltage is also input to the source drive circuit, and the data voltage corresponding to the normal display screen can be input to each data line, so that when the TFT in each row of sub-pixels is turned on, the sub-pixels can be turned on.
  • the pixel inputs the data voltage corresponding to the normal display screen, so that the display panel displays the normal screen.
  • the display device may be any product or component with a display function, such as a mobile phone, a notebook computer, a tablet computer, a television, and a vehicle display product.
  • a display function such as a mobile phone, a notebook computer, a tablet computer, a television, and a vehicle display product.
  • the other indispensable components of the display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should it be used as a limitation to the present disclosure.
  • the display device may also include a flexible printed circuit (FPC) 20 bound to the display panel, and the control circuit 10 may be connected to the flexible circuit board. 20 is electrically connected, so that the control circuit 10 can provide a signal to the display panel 350 through the flexible circuit board 20, so that the display panel 350 can display a discharge screen.
  • FPC flexible printed circuit
  • the display driving circuit may also be electrically connected to the flexible circuit board 20, so that the display driving circuit can provide a signal to the display panel 350 through the flexible circuit board 20, so that the display panel 350 can display a normal image.
  • the display panel may further include: a display drive circuit; wherein the control circuit is electrically connected to the display drive circuit; the control circuit is specifically configured to determine When the shutdown instruction is obtained, the display data corresponding to the discharge screen is provided to the display driving circuit; the display driving circuit is configured to drive the display panel to display the discharge screen according to the received display data corresponding to the discharge screen.
  • the display driving circuit may include: a timing controller 351, a gate driving circuit 140, and a source driving circuit 150; wherein the gate driving circuit 140 is electrically connected to each gate line 110, and the source driving circuit 150 is connected to Each data line 120 is electrically connected; the control circuit 10 is electrically connected to the timing controller 351, and the timing controller 351 is electrically connected to the gate driving circuit 140 and the source driving circuit 150, respectively.
  • control circuit 10 is specifically configured to provide the display data corresponding to the discharge screen to the timing controller 351 when it is determined that the shutdown instruction is acquired;
  • the timing controller 351 is configured to control the gate driving circuit 140 and the source driving circuit 150 to drive the display panel 350 to display the discharge screen according to the received display data corresponding to the discharge screen.
  • the timing controller 351 may be specifically configured to receive the display data corresponding to the discharge screen output by the control circuit 10, and according to the display data corresponding to the discharge screen, input a frame trigger signal, a clock signal, etc. to the gate driving circuit 140,
  • the gate driving circuit 140 inputs the gate scanning signal to the gate line 110 row by row to turn on the TFTs in the sub-pixels row by row.
  • a data voltage is also input to the source driving circuit 150 to input the data voltage corresponding to the discharge screen to each data line 120, so that when the TFT in each row of sub-pixels is turned on, the sub-pixels
  • the pixel electrode in can input the data voltage corresponding to the discharge screen, so that the display panel 350 displays the discharge screen.
  • the gate driving circuit may be arranged on the array substrate by adopting the array substrate row driving (Gate Driver on Array, GOA) technology.
  • the source driving circuit may be an IC.
  • the structure of the gate driving circuit and the source driving circuit can be set according to actual requirements, which is not limited here.
  • the display device may further include a main control circuit 30.
  • the main control circuit 30 may be electrically connected to the flexible circuit board 20 through a transmission line or a binding manner, and the main control circuit 30 is electrically connected to the timing controller 351 through the flexible circuit board 20.
  • the display data to be displayed can be processed by the main control circuit 30, and then provided to the timing controller 351, so that the timing controller 351 sends the signal to the gate according to the signal of the normal display screen.
  • the driving circuit 140 inputs a frame trigger signal, a clock signal, etc., so that the gate driving circuit 140 inputs a gate scanning signal to the gate line 110 row by row to turn on the TFTs in the sub-pixels row by row.
  • a data voltage is also input to the source driving circuit 150, and the data voltage corresponding to the normal display screen can be input to each data line 120, so that when the TFT in each row of sub-pixels is turned on,
  • the pixel electrode in the sub-pixel can input the data voltage corresponding to the normal display screen, so that the display panel 350 can display the normal screen.
  • the display device may further include: a current-limiting protection circuit 160; wherein, the current-limiting input terminal of the current-limiting protection circuit 160 is electrically connected to the high-voltage input port V1 , The current-limiting output end of the current-limiting protection circuit 160 is electrically connected to the receiving port of the display driving circuit.
  • the current limiting protection circuit 160 is configured to limit the current flowing between the high voltage input port V1 and the receiving port of the display driving circuit.
  • the current-limiting output terminal of the current-limiting protection circuit 160 is electrically connected to the receiving port of the timing controller 351.
  • the current limiting protection circuit 160 is configured to limit the current flowing between the high voltage input port V1 and the receiving port of the timing controller 351.
  • timing controller 351 is configured to control the gate driving circuit 140 to apply a high voltage signal to each gate line 110, so that the thin film transistors 132 in each sub-pixel 130 in the display panel 350 are turned on for discharge.
  • the timing controller 351 controls the gate driving circuit 140 to apply a high voltage signal to each gate line 110, so that the thin film transistor 132 in each sub-pixel 130 in the display panel 350 is turned on for discharge, so that the sub-pixel The charge is completely released, which further reduces the charge residue on the pixel electrode and reduces the problem of the jitter of the startup screen.
  • the timing controller 351 controls the gate driving circuit 140 to apply a high voltage signal to each gate line 110, so that the thin film transistor in each sub-pixel 130 in the display panel 350 132 are all turned on at the same time for discharge, so that the charge in the sub-pixels can be completely released, further reducing the residual charge on the pixel electrode, and reducing the problem of the jitter of the startup screen.
  • the current-limiting protection circuit 160 may include: a current-limiting resistor R0; wherein, the first end of the current-limiting resistor R0 is electrically connected to the high-voltage input port V1, The second end of the current limiting resistor R0 is electrically connected to the receiving port of the timing controller 351.
  • the current flowing between the high-voltage input port V1 and the receiving port of the display driving circuit can be limited by the current-limiting resistor R0.
  • the specific resistance value of the current limiting resistor R0 can be designed according to the actual application environment, which is not limited here.
  • the current-limiting protection circuit 160 is also configured to output the voltage of the high-voltage input port V1 as a high-voltage signal to the display when the voltage of the high-voltage input port V1 is less than the high-voltage threshold.
  • Drive circuit when the voltage of the high voltage input port V1 is not less than the high voltage threshold, the high voltage threshold is output to the display drive circuit.
  • the current-limiting protection circuit 160 may also include: a Zener diode VZ; wherein the anode of the Zener diode VZ is electrically connected to the ground terminal GND, and the cathode of the Zener diode VZ is electrically connected to the receiving port of the display drive circuit. .
  • the current limiting protection circuit 160 is further configured to output the voltage of the high voltage input port V1 as a high voltage signal to the timing controller when the voltage of the high voltage input port V1 is less than the high voltage threshold.
  • 351 When the voltage of the high-voltage input port V1 is not less than the high-voltage threshold, output the high-voltage threshold to the timing controller 351.
  • the anode of the Zener diode VZ is electrically connected to the ground terminal GND, and the cathode of the Zener diode VZ is electrically connected to the receiving port of the timing controller 351.
  • the Zener diode VZ has a critical reverse breakdown voltage.
  • the Zener diode VZ has a high resistance state.
  • the Zener diode VZ is greater than the critical reverse breakdown voltage, the reverse resistance of the Zener diode VZ is reduced to a very small value, and it is in a low resistance state at this time.
  • the Zener diode VZ is in a low resistance state, the current flowing through it increases but the voltage across it remains constant, and the voltage across it is the critical reverse breakdown voltage.
  • the Zener diode can be selected according to the actual application environment, which is not limited here.
  • the high voltage threshold may be set to the above-mentioned critical reverse breakdown voltage.
  • peripheral circuits are also provided on the flexible circuit board.
  • the thin film transistors in each sub-pixel in the display panel When the thin film transistors in each sub-pixel in the display panel are turned on at the same time for discharge, it may cause the flow between the high-voltage input port and the receiving port of the display driving circuit.
  • the current is relatively large, which may adversely affect other peripheral circuits on the flexible circuit board.
  • the above-mentioned current-limiting protection circuit may be arranged on a flexible circuit board, so as to perform current-limiting protection on other peripheral circuits on the flexible circuit board through the current-limiting protection circuit.
  • the display device may also include a host electrically connected to the display panel.
  • the power management device and the main control circuit 30 described above may be provided in the host, and the host is electrically connected to the flexible circuit board for transmission of electrical signals.
  • the power management device also supplies power to the main control circuit 30, the control circuit, and the display drive circuit, respectively.
  • the gate high voltage signal VGH can be provided to the high voltage input port V1, so that the gate high voltage signal VGH is provided to the display driving circuit through the current limiting protection circuit.
  • some circuits for realizing other functions are also provided in the display device, and the power management device can also supply power to these circuits.
  • control circuit and the main control circuit can be integrated on a circuit board.
  • control circuit and the main control circuit can also be separately arranged on different circuit boards, which can be designed and determined according to the actual application environment, which is not limited here.
  • the display panel is set to a display panel in a normally black mode.
  • step (2) Real-time judge whether the shutdown command is obtained. If it is determined that the shutdown command is obtained, step (2) is executed. If it is determined that the shutdown command has not been obtained, step (4) is executed.
  • a data voltage is also input to the source driving circuit 150 to input a data voltage corresponding to 0 gray scale to each data line 120, so that when the TFT in each row of sub-pixels is turned on, the sub-pixel
  • the pixel electrode in the pixel can input the data voltage corresponding to the darkest picture, so that the display panel 350 displays the darkest picture, and minimizes the amount of charge input on the pixel electrode in each sub-pixel, thereby realizing the sub-pixel discharge process.
  • the gate high voltage signal VGH is input through the high voltage input port V1, and the timing controller 351 receives the gate high voltage signal VGH.
  • the timing controller 351 controls the gate driving circuit 140 to apply a high voltage signal to each gate line 110, so that the thin film transistors 132 in each sub-pixel 130 in the display panel 350 are simultaneously turned on for discharge.
  • the current-limiting resistor R0 can limit the current between the high-voltage input port V1 and the receiving port of the timing controller 351. Since the gate lines are all pulled up, the current flowing out of the high-voltage input port V1 will increase. In the display device, the appearance of a large instantaneous current will cause the power supply or the power management device to malfunction. In addition, the power supply voltage may be unstable in the display device, and the voltage of the high-voltage input port V1 may increase, which may cause the voltage of the high-voltage input port V1 to be greater than the critical reverse breakdown voltage of the Zener diode VZ. The Zener diode VZ is reversed breakdown. The above-mentioned current limiting and voltage stabilization settings can avoid damage to the components caused by larger voltages and currents.
  • the display data of the normal display screen can be generated, and the display panel can be driven to display according to the display data of the generated normal display screen. In this way, the display panel 350 can be driven to perform normal screen display work.
  • the timing controller 351 may input a frame trigger signal and a clock signal to the gate driving circuit according to the display data of the frame to be displayed in the normal picture so that the gate driving circuit inputs the gate scanning signal to the gate lines row by row to Turn on the TFTs in the sub-pixels line by line.
  • the data voltage is also input to the source driving circuit, so that when the TFT in each row of sub-pixels is turned on, the data voltage corresponding to the normal image can be input to the data line, so that the pixel electrode in the sub-pixel can input the corresponding normal image.
  • Data voltage so that the display panel 350 displays a normal screen.
  • the embodiments of the present disclosure also provide a readable non-transitory storage medium, the readable non-transitory storage medium stores display panel executable instructions, and the executable instructions are configured to execute the above display panel The steps of the control method.
  • the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.
  • the embodiments of the present disclosure also provide a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the above-mentioned display panel when the computer program is executed.
  • a computer device including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the above-mentioned display panel when the computer program is executed. The steps of the control method.
  • the control method and device of the display panel provided by the embodiments of the present disclosure determine whether a shutdown instruction is obtained in real time, and when it is determined that the shutdown instruction is obtained, the display panel is driven to display a discharge screen.
  • the shutdown command can be monitored in real time, so that when the shutdown command is received, the display panel is driven to display the discharge screen in time, so that the amount of charge in the sub-pixels is discharged. Therefore, after the display panel is normally powered on, the problem of screen flicker can be effectively improved, and the user's viewing experience can be greatly improved.

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Abstract

本公开提供了显示面板的控制方法及装置，其中，显示面板的控制方法，包括：实时判断是否获取到关机指令；在判断获取到关机指令时，驱动显示面板显示放电画面；其中，放电画面对应的显示数据的电压不大于预设灰阶对应的电压。

Description

显示面板的控制方法及装置 技术领域
本公开涉及显示技术领域，特别涉及显示面板的控制方法及装置。
背景技术
液晶显示面板(Liquid Crystal Display，LCD)一般包括相对设置的阵列基板与彩膜基板，以及设置于阵列基板与彩膜基板之间的液晶层。在LCD进行显示时，通过分别对阵列基板上的像素电极与彩膜基板上的公共电极施加电压，以控制液晶分子偏转。
发明内容
本公开提供了一种显示面板的控制方法，包括：
实时判断是否获取到关机指令；
在判断获取到所述关机指令时，驱动所述显示面板显示放电画面；其中，所述放电画面对应的显示数据的电压不大于预设灰阶对应的电压。
可选地，在本公开实施例中，所述驱动所述显示面板显示所述放电画面，具体包括：
驱动所述显示面板在连续的N个显示帧中显示所述放电画面；其中，N为整数且10≤N≤30。
可选地，在本公开实施例中，所述驱动所述显示面板在连续的N个显示帧中显示所述放电画面，具体包括：
根据预先存储的所述放电画面对应的显示数据，驱动所述显示面板在连续的N个显示帧中显示所述放电画面。
可选地，在本公开实施例中，所述驱动所述显示面板在连续的N个显示帧中显示所述放电画面，具体包括：
生成所述放电画面对应的显示数据；
根据生成的所述放电画面对应的显示数据，驱动所述显示面板在连续的N个显示帧中显示所述放电画面。
可选地，在本公开实施例中，N＝20。
可选地，在本公开实施例中，所述显示面板为常黑模式的显示面板，所述预设灰阶为10灰阶。
可选地，在本公开实施例中，所述放电画面对应的显示数据的灰阶为0灰阶。
可选地，在本公开实施例中，所述显示面板为常白模式的显示面板，所述预设灰阶为所述显示面板对应的最高灰阶减去10灰阶后的灰阶值。
可选地，在本公开实施例中，所述放电画面对应的显示数据的灰阶为最高灰阶。
可选地，在本公开实施例中，所述显示面板包括多个像素，所述放电画面对应的每个像素的显示数据的灰阶相同。
本公开实施例提供的显示面板的控制电路，所述控制电路被配置为实时判断是否获取到关机指令；在判断获取到所述关机指令时，驱动所述显示面板显示放电画面；其中，所述放电画面对应的显示数据的电压不大于预设电压。
本公开实施例提供的显示装置，包括：显示面板以及上述的显示面板的控制电路。
可选地，在本公开实施例中，所述显示面板包括：显示驱动电路、阵列排布的多个子像素，多条栅线、多条数据线；其中，所述显示驱动电路分别与各所述栅线以及各所述数据线电连接；一行所述子像素对应电连接至少一条栅线，一列子像素对应电连接至少一条数据线；
所述控制电路与所述显示驱动电路电连接；
所述控制电路具体被配置为在判断获取到所述关机指令时，将所述放电画面对应的显示数据提供给所述显示驱动电路；
所述显示驱动电路被配置为根据接收到的所述放电画面对应的显示数据 驱动所述显示面板显示所述放电画面。
可选地，在本公开实施例中，所述显示装置还包括：限流保护电路；所述限流保护电路的限流输入端与高电压输入端口电连接，所述限流保护电路的限流输出端与所述显示驱动电路的接收端口电连接；
所述限流保护电路被配置为对流经所述高电压输入端口和所述显示驱动电路的接收端口之间的电流进行限流；
所述显示驱动电路被配置为控制所述栅极驱动电路对各所述栅线加载高电压信号，使所述显示面板中的各所述子像素中的薄膜晶体管均打开进行放电。
可选地，在本公开实施例中，所述限流保护电路包括：限流电阻；
所述限流电阻的第一端与所述高电压输入端口电连接，所述限流电阻的第二端与所述显示驱动电路的接收端口电连接。
可选地，在本公开实施例中，所述限流保护电路配置为在所述高电压输入端口的电压小于高电压阈值时，将所述高电压输入端口的电压作为所述高电压信号输出给所述显示驱动电路；在所述高电压输入端口的电压不小于所述高电压阈值时，将所述高电压阈值输出给所述显示驱动电路；
所述限流保护电路包括：稳压二极管；其中，所述高电压阈值为所述稳压二极管的临界反向击穿电压；
所述稳压二极管的正极与接地端电连接，所述稳压二极管的负极与所述显示驱动电路的接收端口电连接。
本公开实施例还提供了一种可读非临时性存储介质，所述可读非临时性存储介质存储有显示面板可执行指令，所述可执行指令被配置为执行上述显示面板的控制方法的步骤。
本公开实施例还提供了一种计算机设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现上述显示面板的控制方法的步骤。
附图说明
图1为本公开实施例提供的控制方法的流程图；
图2为本公开实施例提供的一些显示面板的结构示意图；
图3为本公开实施例提供的控制电路和显示面板的结构示意图；
图4a为本公开实施例提供的显示装置的结构示意图；
图4b为本公开实施例提供的显示装置的具体结构示意图；
图5为本公开实施例提供的显示装置的另一些具体结构示意图；
图6为本公开实施例提供的显示装置的又一些具体结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。并且在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。
需要注意的是，附图中各图形的尺寸和形状不反映真实比例，目的只是示意说明本公开内容。并且自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
液晶显示面板(Liquid Crystal Display，LCD)一般包括相对设置的阵列 基板与彩膜基板，以及设置于阵列基板与彩膜基板之间的液晶层。在LCD进行显示时，通过分别对阵列基板上的像素电极与彩膜基板上的公共电极施加电压，以控制液晶分子偏转。其中，像素电极与薄膜晶体管(Thin Film Transistor，TFT)电连接，在TFT打开时，可以使像素电极输入显示数据对应的电压。
一般液晶显示面板应用于显示装置中，显示装置会与外部电源电连接，以通过外部电源进行供电。外部电源会通过电源管理电路对液晶显示面板提供驱动电压信号，以使液晶显示面板正常工作。在液晶显示面板正常工作时，通常会输入驱动电压信号，例如：逻辑和模拟驱动电压信号VDD、控制TFT打开的栅极高电压信号VGH、控制TFT关断的栅极低电压信号VGL、液晶驱动高电压信号VSP、液晶驱动低电压信号VSN。
在液晶显示面板关机时，也需要一定的关闭顺序来控制上述驱动电压信号的输出。例如，先停止液晶驱动高电压信号VSP和液晶驱动低电压信号VSN，之后停止栅极高电压信号VGH和栅极低电压信号VGL，之后停止逻辑和模拟驱动电压信号VDD。然而，若不按照上述顺序关闭输入的驱动电压信号，则会导致LCD出现异常掉电的情况。例如，在车载显示装置的使用过程中，由于设置在车辆上的外部电源经过电源管理电路产生逻辑和模拟驱动电压信号VDD，逻辑和模拟驱动电压信号VDD再经过电压转换电路产生栅极高电压信号VGH、栅极低电压信号VGL、液晶驱动高电压信号VSP以及液晶驱动低电压信号VSN，若显示装置执行关机指令，那么可能会使逻辑和模拟驱动电压信号VDD变为0，导致不能控制液晶驱动高电压信号VSP、液晶驱动低电压信号VSN、栅极高电压信号VGH以及栅极低电压信号VGL的顺序。从而导致液晶驱动高电压信号VSP、液晶驱动低电压信号VSN、栅极高电压信号VGH以及栅极低电压信号VGL可能会同时消失，导致LCD出现异常掉电情况。然而，在LCD异常掉电时，由于像素电极中存储有电荷，若不能得到有效释放，会导致电荷残留。这样在液晶显示面板正常上电后，画面会出现闪烁的问题。
本公开实施例提供的显示面板的控制方法，如图1所示，可以包括如下 步骤：
S10、实时判断是否获取到关机指令；其中，若判断获取到关机指令时，则执行步骤S20。若判断未获取到关机指令时，则执行步骤S30。
S20、驱动显示面板显示放电画面；其中，放电画面对应的显示数据的电压不大于预设灰阶对应的电压。
S30、控制显示面板正常显示图像画面。
本公开实施例提供的显示面板的控制方法，通过实时判断是否获取到关机指令，在判断获取到关机指令时，驱动显示面板显示放电画面。这样可以实时对关机指令进行监测，从而在接收到关机指令时，及时驱动显示面板显示放电画面，以使子像素中的电荷量进行泄放。从而可以在显示面板正常上电后，有效改善画面闪烁的问题，极大地提升了用户的观看体验。
在具体实施时，本公开实施例中的显示面板可以为液晶显示面板。如图2所示，显示面板350可以包括多个像素单元PX，多条栅线110以及多条数据线120；其中，一行子像素对应电连接至少一条栅线，一列子像素对应电连接至少一条数据线。各像素单元PX包括多个子像素130。其中，子像素130阵列排布于显示面板的显示区中。各子像素130包括像素电极131和薄膜晶体管(Thin-film transistor，TFT)132。示例性地，一行子像素对应电连接一条栅线，一列子像素对应电连接一条数据线。具体地，一行子像素中的TFT的栅极与一条栅线电连接，一列子像素中的TFT的源极与一条数据线电连接，每个子像素中的TFT的漏极与像素电极电连接。TFT可以在栅线上传输的信号的控制下导通，以将像素电极和数据线导通。并且，液晶显示面板的具体结构可以与相关技术中的基本相同，在此不作赘述。
示例性地，像素单元可以包括红色子像素，绿色子像素以及蓝色子像素，这样可以通过红绿蓝进行混色，以实现彩色显示。或者，像素单元也可以包括红色子像素，绿色子像素、蓝色子像素以及白色子像素，这样可以通过红绿蓝白进行混色，以实现彩色显示。当然，在实际应用中，像素单元中的子像素的发光颜色可以根据实际应用环境来设计确定，在此不作限定。
在具体实施时，本公开实施例中的显示面板可以应用到移动终端，例如，手机、笔记本电脑、平板电脑、电视机、等。在实际应用中，这些移动终端中会设置电源管理装置，该电源管理装置可以通过端口接收输入外部电源的电压，并将输入电源管理装置的电压进行转换后，通过电源管理装置的输出端口对显示面板供电。一般，在移动终端要进行关机时，通过会触发关机指令。例如，笔记本电脑上具有关机功能键，在用鼠标点击关机功能键时，会生成关机指令，则可以使笔记本电脑执行关机程序。在具体实施时，本公开实施例中的关机指令可以包括移动终端关机时触发的关机指令。
在具体实施时，本公开实施例中的显示面板也可以应用到车载显示产品中。由于车载显示产品一般设置在车辆中，因此一般采用车辆的电源管理装置进行供电。在实际应用中，该电源管理装置可以通过端口接收输入外部电源的电压，并将输入电源管理装置的电压进行转换后，通过电源管理装置的输出端口对显示面板供电。一般在车载显示产品上会设置虚拟或物理开关按键，在按压该开关按键使，会使车载显示产品开启和关机。在按键车载显示产品上的开关按键，控制车载显示产品关机时会触发关机指令，以使车载显示产品关机。在具体实施时，本公开实施例中的关机指令可以包括：按压车载显示产品上的开关按键时触发的关机指令。
一般在显示装置中，会设置电源管理电路，由于外部电源经过电源管理电路产生逻辑和模拟驱动电压信号VDD，逻辑和模拟驱动电压信号VDD再经过电压转换电路产生栅极高电压信号VGH、栅极低电压信号VGL、液晶驱动高电压信号VSP以及液晶驱动低电压信号VSN，这样可以将栅极高电压信号VGH、栅极低电压信号VGL、液晶驱动高电压信号VSP以及液晶驱动低电压信号VSN提供给显示面板，以对显示面板供电。在上述关机指令生成之后，外部电源并不会直接关断，因此，电源管理电路还会输入外部电源的电压，从而使电源管理电路产生逻辑和模拟驱动电压信号VDD，并且也会使得电压转换电路产生栅极高电压信号VGH、栅极低电压信号VGL、液晶驱动高电压信号VSP以及液晶驱动低电压信号VSN。这样可以在显示装置执行关机 指令时，还会有电压输入。
在具体实施时，在本公开实施例中，步骤S20中，驱动显示面板显示放电画面，具体可以包括：驱动显示面板在连续的N个显示帧中显示放电画面；其中，N为整数且10≤N≤30。这样通过在连续的N个显示帧中均显示放电画面，可以在接收到关机指令时，控制显示面板显示多帧放电画面，可以有效的将子像素中像素电极的电荷量降到最低，进一步有效泄放子像素的电荷量。
示例性地，在具体实施时，驱动显示面板在连续的N个显示帧中显示放电画面，具体可以包括：根据预先存储的放电画面对应的显示数据，驱动显示面板在连续的N个显示帧中显示放电画面。这样可以将放电画面对应的显示数据在存储器中预先进行存储，从而在控制显示面板显示放电画面时，可以直接使用已经存储好的显示数据，进而可以降低计算量。
示例性地，在具体实施时，驱动显示面板在连续的N个显示帧中显示放电画面，具体也可以包括：
生成放电画面对应的显示数据；
根据生成的放电画面对应的显示数据，驱动显示面板在连续的N个显示帧中显示放电画面。这样可以在获取到关机指令时，即可生成放电画面对应的显示数据，从而可以根据实际应用环境来确定放电画面对应的显示数据。
在具体实施时，可以使N＝20，这样可以驱动显示面板在连续的20个显示帧中显示放电画面，从而在获取到关机指令时，可以使子像素中的像素电极可以有效的处于放电画面对应的电荷状态下，进一步有效泄放子像素的电荷量。并且，一般显示面板具有不同的刷新频率，例如，30Hz、60Hz、120Hz等刷新频率，这样还可以适应于较高刷新频率的显示面板。
在具体实施时，也可以使N＝10。这样可以驱动显示面板在连续的10个显示帧中显示暗画面，从而可以适应于较低刷新频率的显示面板。
在具体实施时，也可以使N＝30。这样可以驱动显示面板在连续的30个显示帧中显示暗画面，从而可以适应于大部分刷新频率的显示面板。
当然，在实际应用中，N的具体数值也可以根据实际应用环境来设计确定，在此不作限定。
灰阶，一般是将最暗与最亮之间的亮度变化区分为若干份，以便于进行屏幕亮度管控。显示的图像一般都是由许多像素组合而成的，通常每一个像素由红、绿、蓝三个子像素组成，可以呈现出许多不同的颜色，并且每一个子像素都可以显现出不同的亮度级别。灰阶即代表了由最暗到最亮之间不同亮度的层次级别。这中间层级越多，所能够呈现的画面效果也就越细腻。在实际应用中，一般采用6bit显示面板或8bit显示面板来实现图像显示。其中，8bit显示面板，其能表现256个亮度层次，即具有256个灰阶且这些灰阶为0～255灰阶。6bit面板，其能表现64个亮度层次，即具有64灰阶值且这些灰阶为0～63灰阶。
一般显示面板可以具有常黑模式的显示面板和常白模式的显示面板。其中，常黑模式的显示面板在较低灰阶时显示亮度较低的画面，在较高灰阶时显示亮度较高的画面。常白模式的显示面板在较低灰阶时显示亮度较低的画面，在较高灰阶时显示亮度较亮的画面。
示例性地，在具体实施时，可以将显示面板设置为常黑模式的显示面板，在本公开实施例中，可以将预设灰阶设置为10灰阶。这样使得放电画面对应的显示数据的电压不大于10灰阶对应的电压，从而可以使放电画面的亮度较暗。并且，还可以使输入子像素中像素电极的电荷量较少，从而实现降低像素电极中电荷量的效果，进而实现放电效果。
对于常黑模式的显示面板，一般0灰阶对应最黑画面，其对应的显示数据的电压最小，在具体实施时，在显示面板设置为常黑模式的显示面板时，可以使放电画面对应的显示数据的灰阶为0灰阶。这样可以使放电画面为最黑画面，从而可以使输入子像素中像素电极的电荷量最少，进一步实现降低像素电极中电荷量的效果，进而实现放电效果。
示例性地，在具体实施时，可以将显示面板设置为常白模式的显示面板，在本公开实施例中，可以将预设灰阶为显示面板对应的最高灰阶GN max减去 10灰阶后的灰阶值，即预设灰阶为(GN max-10)灰阶值。这样使得放电画面对应的显示数据的电压不大于(GN max-10)灰阶值对应的电压，从而可以使输入子像素中像素电极的电荷量较少，从而实现降低像素电极中电荷量的效果，进而实现放电效果。
对于常白模式的显示面板，一般最高灰阶对应最亮画面，其对应的显示数据的电压最小，在具体实施时，在显示面板设置为常白模式的显示面板时，可以使放电画面对应的显示数据的灰阶为最高灰阶。这样可以使放电画面为最亮画面，从而可以使输入子像素中像素电极的电荷量最少，进一步实现降低像素电极中电荷量的效果，进而实现放电效果。
在具体实施时，可以使放电画面对应的每个像素单元的显示数据的灰阶相同。这样可以使放电画面对应的显示数据比较统一，从而可以降低生成放电画面对应的显示数据的电压的计算量，降低功耗。
基于同一发明构思，本公开实施例还提供了一种显示面板的控制电路，如图3所示，其中，该控制电路10被配置为实时判断是否获取到关机指令；在判断获取到关机指令时，驱动显示面板350显示放电画面；其中，放电画面对应的显示数据的电压不大于预设电压。
示例性地，上述控制电路可以设置为结合软件和硬件方面的实施例的形式。例如，上述控制电路可以设置为集成电路(Integrated Circuit，IC)。
基于同一发明构思，本公开实施例还提供了一种显示装置，如图4a与图4b所示，包括显示面板350以及本公开实施例提供的上述显示面板的控制电路10。该显示装置解决问题的原理与前述显示面板的控制电路相似，因此该显示装置的实施可以参见前述显示面板的控制电路的实施，重复之处在此不再赘述。
在具体实施时，本公开实施例中的显示面板可以为液晶显示面板。其中，液晶显示面板可以包括：相对设置的阵列基板和对向基板，封装于阵列基板和对向基板之间的液晶层，与阵列基板进行绑定的柔性电路板(Flexible Printed Circuit，FPC)，与FPC电连接的显示驱动电路。其中，阵列基板上设 置有多条栅线、多条数据线以及位于子像素中的像素电极和TFT，对向基板上设置有彩膜层和公共电极等。显示驱动电路可以包括：时序控制器，栅极驱动电路、源极驱动电路；栅极驱动电路分别与各栅线电连接，源极驱动电路分别与各数据线电连接。示例性地，时序控制器可以根据正常显示画面的信号，向栅极驱动电路输入帧触发信号和时钟信号等，以使栅极驱动电路逐行对栅线输入栅极扫描信号，以逐行打开子像素中的TFT。并且，根据接收到的正常显示画面的信号，还向源极驱动电路输入数据电压，可以向各数据线上输入对应正常显示画面的数据电压，以在各行子像素中的TFT打开时，使子像素中的像素电极可以输入正常显示画面对应的数据电压，从而使显示面板显示正常画面。
在具体实施时，本公开实施例中的显示面板可以为有机发光二极管(Organic Light Emitting Diode，OLED)显示面板。其中，OLED显示面板可以包括相对设置的阵列基板和对向基板，与显示面板进行绑定的柔性电路板(Flexible Printed Circuit，FPC)，与FPC电连接的显示驱动电路。其中，阵列基板上可以设置有多条栅线、多条数据线以及位于子像素中的OLED和像素驱动电路。像素驱动电路可以包括TFT和存储电容。并且，显示驱动电路可以包括：时序控制器，栅极驱动电路、源极驱动电路；栅极驱动电路分别与各栅线电连接，源极驱动电路分别与各数据线电连接。示例性地，时序控制器可以根据正常显示画面的信号，向栅极驱动电路输入帧触发信号和时钟信号等，以使栅极驱动电路逐行对栅线输入栅极扫描信号，以逐行打开子像素中的TFT。并且，根据接收到的正常显示画面的信号，还向源极驱动电路输入数据电压，可以向各数据线上输入对应正常显示画面的数据电压，以在各行子像素中的TFT打开时，使子像素输入正常显示画面对应的数据电压，从而使显示面板显示正常画面。
在具体实施时，在本公开实施例中，显示装置可以为：手机、笔记本电脑、平板电脑、电视机、车载显示产品等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该 理解具有的，在此不做赘述，也不应作为对本公开的限制。
在具体实施时，在本公开实施例中，如图4a所示，显示装置还可以包括与显示面板进行绑定的柔性电路板(Flexible Printed Circuit，FPC)20，控制电路10可以与柔性电路板20电连接，这样可以使控制电路10通过柔性电路板20向显示面板350提供信号，以使显示面板350显示放电画面。
进一步地，显示驱动电路也可以与柔性电路板20电连接，这样可以使显示驱动电路通过柔性电路板20向显示面板350提供信号，以使显示面板350显示正常画面。
在具体实施时，在本公开实施例中，如图4a与图4b所示，显示面板还可以包括：显示驱动电路；其中，控制电路与显示驱动电路电连接；控制电路具体被配置为在判断获取到关机指令时，将放电画面对应的显示数据提供给显示驱动电路；显示驱动电路被配置为根据接收到的放电画面对应的显示数据驱动显示面板显示放电画面。示例性地，显示驱动电路可以包括：时序控制器351、栅极驱动电路140以及源极驱动电路150；其中，栅极驱动电路140分别与各栅线110电连接，源极驱动电路150分别与各数据线120电连接；其中，控制电路10与时序控制器351电连接，时序控制器351分别与栅极驱动电路140和源极驱动电路150电连接。
并且，控制电路10具体被配置为在判断获取到关机指令时，将放电画面对应的显示数据提供给时序控制器351；
时序控制器351被配置为根据接收到的放电画面对应的显示数据控制栅极驱动电路140和源极驱动电路150驱动显示面板350显示放电画面。
示例性地，时序控制器351具体可以被配置为接收控制电路10输出的放电画面对应的显示数据，根据该放电画面对应的显示数据，向栅极驱动电路140输入帧触发信号和时钟信号等，以使栅极驱动电路140逐行对栅线110输入栅极扫描信号，以逐行打开子像素中的TFT。并且，根据该放电画面对应的显示数据，还向源极驱动电路150输入数据电压，以向各数据线120输入对应放电画面的数据电压，以在各行子像素中的TFT打开时，使子像素中的 像素电极可以输入放电画面对应的数据电压，从而使显示面板350显示放电画面。
示例性地，栅极驱动电路可以采用阵列基板行驱动(Gate Driver on Array，GOA)技术设置在阵列基板上。源极驱动电路可以为IC。当然，在实际应用中，可以根据实际需求设置栅极驱动电路和源极驱动电路的结构，在此不作限定。
并且，在具体实施时，如图4a与图4b所示，显示装置还可以包括主控电路30。该主控电路30可以通过传输线或绑定的方式与柔性电路板20电连接，并且，主控电路30通过柔性电路板20与时序控制器351电连接。这样可以在显示面板正常显示图像时，可以通过主控电路30对待显示的显示数据进行处理后，提供给时序控制器351，以使时序控制器351根据接收到正常显示画面的信号，向栅极驱动电路140输入帧触发信号和时钟信号等，以使栅极驱动电路140逐行对栅线110输入栅极扫描信号，以逐行打开子像素中的TFT。并且，根据接收到的正常显示画面的信号，还向源极驱动电路150输入数据电压，可以向各数据线120上输入对应正常显示画面的数据电压，以在各行子像素中的TFT打开时，使子像素中的像素电极可以输入正常显示画面对应的数据电压，从而使显示面板350显示正常画面。
在具体实施时，在本公开实施例中，如图5所示，显示装置还可以包括：限流保护电路160；其中，限流保护电路160的限流输入端与高电压输入端口V1电连接，限流保护电路160的限流输出端与显示驱动电路的接收端口电连接。限流保护电路160被配置为对流经高电压输入端口V1和显示驱动电路的接收端口之间的电流进行限流。示例性地，限流保护电路160的限流输出端与时序控制器351的接收端口电连接。限流保护电路160被配置为对流经高电压输入端口V1和时序控制器351的接收端口之间的电流进行限流。
并且，时序控制器351被配置为控制栅极驱动电路140对各栅线110加载高电压信号，使显示面板350中的各子像素130中的薄膜晶体管132均打开进行放电。
这样通过时序控制器351控制栅极驱动电路140对各栅线110加载高电压信号，以使显示面板350中的各子像素130中的薄膜晶体管132均打开进行放电，从而可以使子像素中的电荷进行完全释放，进一步降低像素电极上的电荷残留，降低开机画面抖动的问题。
示例性地，可以在驱动显示面板显示放电画面之后，通过时序控制器351控制栅极驱动电路140对各栅线110加载高电压信号，以使显示面板350中的各子像素130中的薄膜晶体管132均同时打开进行放电，从而可以使子像素中的电荷进行完全释放，进一步降低像素电极上的电荷残留，降低开机画面抖动的问题。
在具体实施时，在本公开实施例中，如图6所示，限流保护电路160可以包括：限流电阻R0；其中，限流电阻R0的第一端与高电压输入端口V1电连接，限流电阻R0的第二端与时序控制器351的接收端口电连接。
在具体实施时，在本公开实施例中，可以通过限流电阻R0对流经高电压输入端口V1和显示驱动电路的接收端口之间的电流进行限流。在实际应用中，可以根据实际应用环境来设计限流电阻R0的具体电阻值，在此不作限定。
在具体实施时，在本公开实施例中，限流保护电路160还被配置为在高电压输入端口V1的电压小于高电压阈值时，将高电压输入端口V1的电压作为高电压信号输出给显示驱动电路；在高电压输入端口V1的电压不小于高电压阈值时，将高电压阈值输出给显示驱动电路。如图6所示，限流保护电路160还可以包括：稳压二极管VZ；其中，稳压二极管VZ的正极与接地端GND电连接，稳压二极管VZ的负极与显示驱动电路的接收端口电连接。
示例性地，如图6所示，限流保护电路160还被配置为在高电压输入端口V1的电压小于高电压阈值时，将高电压输入端口V1的电压作为高电压信号输出给时序控制器351；在高电压输入端口V1的电压不小于高电压阈值时，将高电压阈值输出给时序控制器351。如图6所示，稳压二极管VZ的正极与接地端GND电连接，稳压二极管VZ的负极与时序控制器351的接收端口电连接。
在具体实施时，在本公开实施例中，稳压二极管VZ具有临界反向击穿电压。在稳压二极管VZ的正极与负极之间的电压小于临界反向击穿电压时，稳压二极管VZ具有高阻态。在稳压二极管VZ的正极与负极之间的电压大于临界反向击穿电压时，稳压二极管VZ的反向电阻降低到一个很小的数值，此时处于低阻态。在稳压二极管VZ处于低阻态时，流过其的电流增加但其两端的电压保持恒定，并且使其两端的电压为临界反向击穿电压。在实际应用中，可以根据实际应用环境来选择稳压二极管，在此不作限定。
在具体实施时，在本公开实施例中，可以将高电压阈值设置为上述临界反向击穿电压。
一般柔性电路板上还会设置有其它外围电路，在显示面板中的各子像素中的薄膜晶体管均同时打开进行放电时，可能会导致流经高电压输入端口和显示驱动电路的接收端口之间的电流较大，这样将可能会对柔性电路板上的其它外围电路造成不利影响。在具体实施时，可以将上述限流保护电路设置在柔性电路板上，以通过限流保护电路对柔性电路板上的其它外围电路进行限流保护。
在具体实施时，显示装置可能还会包括与显示面板电连接的主机，上述电源管理装置和主控电路30可以设置在主机中，主机与柔性电路板电连接，以进行电信号的传输。并且，电源管理装置还分别为主控电路30、控制电路、显示驱动电路进行供电。其中，可以将栅极高电压信号VGH提供给高电压输入端口V1，以使栅极高电压信号VGH通过限流保护电路提供给显示驱动电路。当然，显示装置中还会设置一些实现其他功能的电路，该电源管理装置还可以为这些电路进行供电。
在具体实施时，可以将控制电路与主控电路集成在一个电路板上。当然，也可以将控制电路与主控电路分别设置在不同的电路板上，这可以根据实际应用环境来设计确定，在此不作限定。
下面以图6所示的结构，对本公开实施例提供的上述显示装置的工作过程进行描述。高电压阈值为稳压二极管VZ的临界反向击穿电压，N＝20以及 暗画面对应的显示数据的灰阶为0灰阶为例。其中，显示面板设置为常黑模式的显示面板。
本公开实施例提供的上述显示装置的工作过程，可以包括如下步骤：
(1)实时判断是否获取到关机指令。若判断获取到关机指令时，则执行步骤(2)。若判断未获取到关机指令时，则执行步骤(4)。
(2)将预先存储的0灰阶对应的显示数据提供给时序控制器351，以使时序控制器351根据0灰阶对应的显示数据，向栅极驱动电路140输入帧触发信号和时钟信号等，以使栅极驱动电路140逐行对栅线110输入栅极扫描信号，以逐行打开子像素中的TFT。并且，根据0灰阶对应的显示数据，还向源极驱动电路150输入数据电压，以向各数据线120输入对应0灰阶的数据电压，以在各行子像素中的TFT打开时，使子像素中的像素电极可以输入最黑画面对应的数据电压，从而使显示面板350显示最黑画面，并使各子像素中像素电极上输入的电荷量最少，从而实现子像素放电的过程。
(3)通过高电压输入端口V1输入栅极高电压信号VGH，时序控制器351接收栅极高电压信号VGH。并且，时序控制器351控制栅极驱动电路140对各栅线110加载高电压信号，以使显示面板350中的各子像素130中的薄膜晶体管132均同时打开进行放电。
限流电阻R0可以对高电压输入端口V1和时序控制器351的接收端口之间的电流进行限流。由于栅线均拉高，则高电压输入端口V1流出的电流将会增加，在显示装置中，瞬间大电流的出现会导致电源或者电源管理装置出现故障。此外，在显示装置中会出现电源电压不稳定的情况，高电压输入端口V1的电压可能会增加，从而可能会导致高电压输入端口V1的电压大于稳压二极管VZ的临界反向击穿电压，使稳压二极管VZ被反向击穿。上述限流和稳压设置可以避免较大的电压和电流对元件造成损坏。
(4)可以生成正常显示画面的显示数据，并根据生成的正常显示画面的显示数据驱动显示面板进行显示。这样可以驱动显示面板350进行正常的画面显示工作。
具体地，时序控制器351可以根据正常画面的待显示帧的显示数据，向栅极驱动电路输入帧触发信号和时钟信号等以使栅极驱动电路逐行对栅线输入栅极扫描信号，以逐行打开子像素中的TFT。并且，还向源极驱动电路输入数据电压，以在各行子像素中的TFT打开时，可以向数据线上输入对应正常画面的数据电压，从而使子像素中的像素电极可以输入正常画面对应的数据电压，从而使显示面板350显示正常画面。
基于同一发明构思，本公开实施例还提供了一种可读非临时性存储介质，该可读非临时性存储介质存储有显示面板可执行指令，并且该可执行指令被配置为执行上述显示面板的控制方法的步骤。具体地，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
基于同一发明构思，本公开实施例还提供了一种计算机设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，处理器执行计算机程序时实现上述显示面板的控制方法的步骤。
本公开实施例提供的显示面板的控制方法及装置，通过实时判断是否获取到关机指令，在判断获取到关机指令时，驱动显示面板显示放电画面。这样可以实时对关机指令进行监测，从而在接收到关机指令时，及时驱动显示面板显示放电画面，以使子像素中的电荷量进行泄放。从而可以在显示面板正常上电后，有效改善画面闪烁的问题，极大地提升了用户的观看体验。
尽管已描述了本公开的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开范围的所有变更和修改。
显然，本领域的技术人员可以对本公开实施例进行各种改动和变型而不脱离本公开实施例的精神和范围。这样，倘若本公开实施例的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (18)

  1. 一种显示面板的控制方法，其中，包括：
    实时判断是否获取到关机指令；
    在判断获取到所述关机指令时，驱动所述显示面板显示放电画面；其中，所述放电画面对应的显示数据的电压不大于预设灰阶对应的电压。
  2. 如权利要求1所述的显示面板的控制方法，其中，所述驱动所述显示面板显示所述放电画面，具体包括：
    驱动所述显示面板在连续的N个显示帧中显示所述放电画面；其中，N为整数且10≤N≤30。
  3. 如权利要求2所述的显示面板的控制方法，其中，所述驱动所述显示面板在连续的N个显示帧中显示所述放电画面，具体包括：
    根据预先存储的所述放电画面对应的显示数据，驱动所述显示面板在连续的N个显示帧中显示所述放电画面。
  4. 如权利要求2所述的显示面板的控制方法，其中，所述驱动所述显示面板在连续的N个显示帧中显示所述放电画面，具体包括：
    生成所述放电画面对应的显示数据；
    根据生成的所述放电画面对应的显示数据，驱动所述显示面板在连续的N个显示帧中显示所述放电画面。
  5. 如权利要求3或4所述的显示面板的控制方法，其中，N＝20。
  6. 如权利要求1-5任一项所述的显示面板的控制方法，其中，所述显示面板为常黑模式的显示面板，所述预设灰阶为10灰阶。
  7. 如权利要求6所述的显示面板的控制方法，其中，所述放电画面对应的显示数据的灰阶为0灰阶。
  8. 如权利要求1-5任一项所述的显示面板的控制方法，其中，所述显示面板为常白模式的显示面板，所述预设灰阶为所述显示面板对应的最高灰阶减去10灰阶后的灰阶值。
  9. 如权利要求8所述的显示面板的控制方法，其中，所述放电画面对应的显示数据的灰阶为最高灰阶。
  10. 如权利要求6-9任一项所述的显示面板的控制方法，其中，所述显示面板包括多个像素，所述放电画面对应的每个像素的显示数据的灰阶相同。
  11. 一种显示面板的控制电路，其中，所述控制电路被配置为实时判断是否获取到关机指令；在判断获取到所述关机指令时，驱动所述显示面板显示放电画面；其中，所述放电画面对应的显示数据的电压不大于预设电压。
  12. 一种显示装置，其中，包括：显示面板以及如权利要求11所述的显示面板的控制电路。
  13. 如权利要求12所述的显示装置，其中，所述显示面板包括：显示驱动电路、阵列排布的多个子像素，多条栅线、多条数据线；其中，所述显示驱动电路分别与各所述栅线以及各所述数据线电连接；一行所述子像素对应电连接至少一条栅线，一列子像素对应电连接至少一条数据线；
    所述控制电路与所述显示驱动电路电连接；
    所述控制电路具体被配置为在判断获取到所述关机指令时，将所述放电画面对应的显示数据提供给所述显示驱动电路；
    所述显示驱动电路被配置为根据接收到的所述放电画面对应的显示数据驱动所述显示面板显示所述放电画面。
  14. 如权利要求13所述的显示装置，其中，所述显示装置还包括：限流保护电路；所述限流保护电路的限流输入端与高电压输入端口电连接，所述限流保护电路的限流输出端与所述显示驱动电路的接收端口电连接；
    所述限流保护电路被配置为对流经所述高电压输入端口和所述显示驱动电路的接收端口之间的电流进行限流；
    所述显示驱动电路被配置为控制所述栅极驱动电路对各所述栅线加载高电压信号，使所述显示面板中的各所述子像素中的薄膜晶体管均打开进行放电。
  15. 如权利要求14所述的显示装置，其中，所述限流保护电路包括：限 流电阻；
    所述限流电阻的第一端与所述高电压输入端口电连接，所述限流电阻的第二端与所述显示驱动电路的接收端口电连接。
  16. 如权利要求14或15所述的显示装置，其中，所述限流保护电路配置为在所述高电压输入端口的电压小于高电压阈值时，将所述高电压输入端口的电压作为所述高电压信号输出给所述显示驱动电路；在所述高电压输入端口的电压不小于所述高电压阈值时，将所述高电压阈值输出给所述显示驱动电路；
    所述限流保护电路包括：稳压二极管；其中，所述高电压阈值为所述稳压二极管的临界反向击穿电压；
    所述稳压二极管的正极与接地端电连接，所述稳压二极管的负极与所述显示驱动电路的接收端口电连接。
  17. 一种可读非临时性存储介质，所述可读非临时性存储介质存储有显示面板可执行指令，其中，所述可执行指令被配置为执行权利要求1-10任一项所述的显示面板的控制方法的步骤。
  18. 一种计算机设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其中，所述处理器执行所述计算机程序时实现权利要求1-10任一项所述的显示面板的控制方法的步骤。
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