WO2020259484A1 - 显示面板的驱动电路、驱动方法和显示装置 - Google Patents

显示面板的驱动电路、驱动方法和显示装置 Download PDF

Info

Publication number
WO2020259484A1
WO2020259484A1 PCT/CN2020/097667 CN2020097667W WO2020259484A1 WO 2020259484 A1 WO2020259484 A1 WO 2020259484A1 CN 2020097667 W CN2020097667 W CN 2020097667W WO 2020259484 A1 WO2020259484 A1 WO 2020259484A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
switch
display panel
control
voltage
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2020/097667
Other languages
English (en)
French (fr)
Inventor
黄笑宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Original Assignee
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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.)
Filing date
Publication date
Application filed by HKC Co Ltd, Chongqing HKC Optoelectronics Technology Co Ltd filed Critical HKC Co Ltd
Publication of WO2020259484A1 publication Critical patent/WO2020259484A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects

Definitions

  • the present application relates to the field of display technology, and in particular to a driving circuit, a driving method and a display device of a display panel.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • the system motherboard connects the R/G/B compression signal, control signal and power supply to the connector on the PCB board through wires, and the data is processed by the TCON (Timing Controller) IC on the PCB board.
  • TCON Timing Controller
  • S-COF Source-Chip on Film
  • G-COF Gate-Chip on Film
  • the purpose of this application is to provide a driving circuit, a driving method, and a display device for a display panel that can improve the afterimage of shutdown.
  • the present application discloses a driving circuit for a display panel, which includes a gate driving circuit and a charge neutralization control circuit.
  • the gate driving circuit includes a plurality of gate driving signal output terminals, and the plurality of gate driving signal output terminals Are respectively connected to the plurality of gate lines of the display panel in a one-to-one correspondence;
  • the charge neutralization control circuit is respectively connected to the plurality of gate drive signal output terminals and the plurality of gate lines of the display panel;
  • the charge neutralization control circuit includes a first power supply circuit, a switch control signal circuit, and a plurality of switch circuits.
  • the first power supply circuit provides a high-level signal; the switch control signal circuit detects the actual operating voltage of the display panel , And output a switch control signal according to the actual working voltage.
  • the control terminals of the multiple switch circuits are connected to the output terminals of the switch control signal circuit, and the input terminals are connected In the first power supply circuit, the output terminals are respectively connected to a plurality of the gate lines; wherein, when the switch control signal circuit of the charge neutralization control circuit detects that the actual operating voltage meets a preset rule, The switch control signal circuit generates a switch control signal to control turning on the plurality of switch circuits, and the high-level signal is output to the plurality of gate lines of the display panel.
  • the application also discloses a driving method of the driving circuit of the display panel, which is applied to the driving circuit of the above-mentioned display panel, and includes the steps:
  • a switch control signal controls a plurality of switch circuits to remain closed, and the gate drive circuit outputs a gate drive signal to the gate drive signal output terminal through the gate drive signal output terminal.
  • the gate line of the display panel when the actual operating voltage meets a preset rule, it is determined to be a shutdown state, and a switch control signal controls a plurality of switch circuits to conduct, so as to output a high level signal to all gates of the display panel line.
  • the application also discloses a display device, including a driving circuit and a display panel, and the driving circuit drives the display panel to display.
  • a charge neutralization control circuit provides a high level for all gate lines.
  • the charge neutralization control circuit receives the actual operating voltage of the display panel, it generates a switch control signal to control the conduction.
  • the plurality of switch circuits respectively corresponding to control each gate line of the display panel, the control terminal of each switch circuit is respectively connected to the output terminal connected to the switch control signal circuit, and the input terminal is respectively connected to a High level, when the display panel is working normally, all the switching circuits will remain closed, so that it will not affect the voltage input to the gate line when the display panel is working normally. Once it is turned off, the actual display panel will be detected.
  • the operating voltage will generate the switching control signal, and the switching circuit will be turned on one by one, providing the same voltage to all the gate lines, turning on all the thin film transistors, thereby quickly neutralizing the charges in all the pixel electrodes, improving the local Screen display problems, thereby improving the afterimage of shutdown.
  • FIG. 1 is a schematic diagram of a display device according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a gate driving circuit according to an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a driving signal according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a gate driving circuit and its comparator according to another embodiment of the present application.
  • FIG. 5 is a schematic diagram of a driving signal of another embodiment of the present application.
  • FIG. 6 is a schematic diagram of a gate driving circuit, a comparator, and a flip-flop according to an embodiment of the present application
  • FIG. 7 is a schematic diagram of a driving method of an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a driving circuit of another embodiment of the present application.
  • FIG. 9 is a schematic diagram of a driving signal of another embodiment of the present application.
  • Fig. 10 is a schematic diagram of a charge neutralization control circuit and its inverter according to an embodiment of the present application.
  • FIG. 11 is a flowchart of a driving method according to an embodiment of the present application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features; “plurality” means two or more.
  • the term “comprising” and any variations thereof means non-exclusive inclusion, the possibility of the presence or addition of one or more other features, integers, steps, operations, units, components, and/or combinations thereof.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection , It can also be electrical connection; it can be directly connected, it can also be indirectly connected through an intermediate medium, or the internal connection of two components.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection , It can also be electrical connection; it can be directly connected, it can also be indirectly connected through an intermediate medium, or the internal connection of two components.
  • an embodiment of the present application discloses a display device 100, which includes a driving circuit 300 and a display panel 200.
  • the driving circuit 300 drives the display panel 200 to display, and the driving circuit 300 includes a gate driver.
  • the gate driving circuit 320 includes a plurality of gate driving signal output terminals 321, and the plurality of gate driving signal output terminals 321 are respectively connected to the display panel 200 in a one-to-one correspondence.
  • the plurality of gate lines 340; the charge neutralization control circuit 330 is connected to the plurality of gate drive signal output terminals and the plurality of gate lines of the display panel, respectively.
  • the charge neutralization control circuit 330 includes a first power supply circuit 350, a switch control signal circuit 360, and a plurality of switch circuits 332.
  • the first power supply circuit provides a high-level signal (VGH);
  • the switch control The signal circuit 360 receives the actual operating voltage of the display panel, generates a switch control signal and outputs it; a plurality of switch circuits 332 control and output high-level signals to each different gate line 340 one by one, and the control terminal is connected to the switch
  • the output end of the control signal circuit, the input end is connected to the first power supply circuit, and the output ends are respectively connected to a plurality of the gate lines in a one-to-one correspondence; wherein, when the switch control signal circuit of the charge neutralization control circuit detects When the actual operating voltage complies with the preset rule, the switch control signal circuit generates a switch control signal to control to turn on the multiple switch circuits, and output the high voltage through multiple output terminals of the multiple switch circuits.
  • the flat signal is sent to the multiple gate lines of the display panel to turn on all the thin film transistor switches corresponding to all the gate lines 340, so that the charges in all the pixel electrodes in the display panel 200 are quickly neutralized, preventing shutdown ,
  • the voltage difference formed by the charge discharge causes display abnormalities, such as screen smear.
  • a comparator 333 is also provided in the switch control signal circuit, and the first input terminal of the comparator receives the actual display panel
  • the output terminal of the comparator is respectively connected to a plurality of control terminals of the plurality of switching circuits; the second input terminal of the comparator is connected to a preset reference voltage; wherein, the comparator receives the display For the actual operating voltage of the panel, the actual operating voltage of the display panel is compared with the preset reference voltage, and the switch control signal is generated according to the comparison result to control the switch circuit to be turned on or off.
  • the voltage of the display panel during normal operation is the rated operating voltage.
  • the circuit 332 causes other display problems. It compares the actual operating voltage of the display panel with the reference voltage, and outputs a high-level signal or a low-level signal according to the comparison result to control the switching circuit 332 to conduct, which is very convenient and quick. It should be noted that when setting the preset reference voltage, it will be set according to the specific parameters of the display panel 200. Different display panels 200 have different parameters, and the specific size of the preset reference voltage set is inconsistent.
  • the voltage is greater than 50% of the rated working voltage and less than 90% of the rated working voltage, and the preset reference voltage is equal to 90% of the actual working voltage. Within this range, shutdown can be prevented When the actual operating voltage drops too slowly, the switching comparator 333 fails to respond in time.
  • the switch circuit 332 is a switch turned on by a low-level signal, and the first input terminal The actual working voltage (VGH1) is collected, and the second input terminal is connected to a preset reference voltage (Vref). When the voltage of the actual working voltage is greater than the preset reference voltage, a high-level signal is output. At this time, the switch circuit 332 does not need to be turned on When the actual working voltage is less than the preset reference voltage, a low-level signal is output. At this time, the switch circuit 332 can select a thin film transistor that is turned on by the low-level signal, and the corresponding switch circuit is a low-level signal-turned switch.
  • a switch control signal is generated to control the turning on of the multiple switch circuits, and the high-level signal is output to the multiple gate lines to turn on All the thin film transistors in the display panel neutralize the charge in all the pixel electrodes in the display panel, thereby reducing or even eliminating the shutdown image.
  • the reference voltage can also determine that the display panel is already in shutdown mode.
  • a voltage detection circuit can also be used instead of the comparator. The voltage detection circuit determines whether the actual working voltage is equal to the preset reference voltage. When the reference voltage is set, a switch control signal is immediately generated to control to turn on the multiple switch circuits.
  • the switch control signal circuit further includes a preset logic level signal VDD and a flip-flop, the control pin of the flip-flop is connected to the output terminal of the comparator, and the flip-flop
  • the input pin is connected to the predetermined logic level signal, and the output pins of the trigger are respectively connected to the control terminals of a plurality of the switch circuits; wherein, the output terminals of the comparator are correspondingly connected through the trigger
  • a switch control signal is generated by the trigger to control the on or off of the multiple switch circuits,
  • the switch circuit 332 it can be a thin film transistor turned on by a high-level signal, or it may be a thin film transistor turned on by a low-level signal, which can be specifically set according to the actual circuit; it should be noted that,
  • the control pin of the flip-flop 334 is connected to the output terminal of the comparator 333, the input
  • the above-mentioned flip-flop 334 includes a falling edge flip-flop, the preset logic level signal is a logic high level signal, the switch circuit includes a high-level signal turn-on switch, the high-level signal turn-on switch is receiving Turn on when high-level signal, turn off when receiving low-level signal;
  • the comparator compares the actual working voltage with the preset reference voltage, and outputs a low level signal to trigger the trigger according to the comparison result, and after the trigger is triggered, outputs a high level
  • the switch control signal of the signal controls the switch circuit to conduct.
  • the switch circuit 332 does not need to perform Turn on, when the actual working voltage (VGH1) is less than the preset reference voltage (Vref), a high-level signal is output, the flip-flop 334 is selected as a rising edge trigger, and the preset logic level signal is a logic high level signal ,
  • the switch circuit includes a high-level signal turn-on switch, the high-level signal turn-on switch turns on when receiving a high-level signal, and turns off when receiving a low-level signal; the comparator turns the actual The operating voltage is compared with the preset reference voltage, and a high-level signal is output to trigger the trigger according to the comparison result. After the trigger is triggered, a switch control signal of a high-level signal is output to control the switch circuit Conduction.
  • the charge neutralization control circuit 330 further includes a flip-flop 334, and the flip-flop 334 communicates with the comparator. 333 and a plurality of the switch circuits 332, the control pin of the flip-flop 334 is connected to the output terminal of the comparator 333, and the input pin of the flip-flop 334 is connected to the output of a preset logic high level signal
  • the output pins of the flip-flop 334 are respectively connected to the multiple control terminals of the multiple switch circuits 332; the control terminal of each switch circuit 332 is respectively connected to the input of each switch circuit 332
  • the logic high level signal can be set to specific values according to the parameters of different display panels 200. The logic high level is sufficient to turn on all the thin film transistors in the display panel 200, and the charge of all the pixel electrodes in the display panel 200 In progress.
  • the display panel is divided into a display area and a non-display area
  • the non-display area includes a bonding area
  • the gate driving circuit and the charge neutralization control circuit are respectively connected through the bonding area.
  • the fixed area bonding is connected to the display panel.
  • the multiple output pins of the gate driving circuit and the gate driving circuit are arranged on the flip chip film, and the charge neutralization control circuit can also be arranged on the flip chip film , And then respectively connected to the output pins; or it can be set in the non-display area, and the fan-out wiring of the fan-out area is set on a different metal layer, and then respectively connected to multiple output pins or output pins and scan lines Fan-out routing between.
  • the charge neutralization control circuit 330 includes an inverter 335.
  • the inverter 335 connects the comparator 333 with the plurality of switch circuits 332, the input terminal of the inverter 335 is connected to the output terminal of the comparator 333, and the output terminal of the inverter 335 is respectively connected to Multiple control terminals of the switching circuit 332; wherein the inverter outputs an opposite level signal according to the received level signal, and the inverter generates the switch control signal according to the comparison of the comparator To control the conduction of a plurality of the switch circuits.
  • the inverter 335 outputs an opposite level signal according to the received level signal, a plurality of the switch circuits 332 are turned on when the low level signal is
  • the switch circuit 332 corresponds to the thin film transistor set to be turned on by the high-level signal.
  • the comparator outputs a high-level signal
  • the inverter 335 outputs a low-level signal
  • the switch circuit 332 Corresponding to the thin film transistors set to be turned on by low-level signals, as long as the switch circuit 332 can be turned on, it is feasible to output high-level signals to all the gate lines 340.
  • the driving circuit 300 of the present application further includes a grounding control circuit 370.
  • the grounding control circuit disconnects the pixel electrode 380 and the ground terminal.
  • the charge neutralization control circuit 330 sends a high level signal While outputting to all the gate lines 340, the grounding control circuit 370 is turned on to connect all the pixel electrodes 380 to the ground terminal for grounding discharge, so as to better eliminate the residual image and achieve a better effect of eliminating the residual image.
  • a method for driving a gate driving circuit of a display panel is disclosed, which is applied to the gate driving circuit in the above embodiment, and includes the steps:
  • S1 Detect the actual working voltage of the display panel, and correspondingly output different switch control signals according to whether the actual working voltage meets the preset rule to control the on or off of multiple switch circuits;
  • a switch control signal controls a plurality of switch circuits to remain closed, and the gate drive circuit outputs a gate drive through the gate drive signal output terminal Signal to the gate line of the display panel; when the actual working voltage satisfies the preset rule, it is determined to be the off state, and the switch control signal controls the multiple switch circuits to conduct, so as to output a high level signal to all the display panel Grid line.
  • whether the preset rules are met is determined by comparing the actual working voltage with the preset reference voltage.
  • the voltage when the display panel is in normal working state is the rated working voltage, and the preset reference voltage is greater than the rated working voltage. 50% of the voltage and less than 90% of the rated working voltage, when the actual working voltage is greater than the preset reference voltage, the actual working voltage does not meet the preset rule; when the actual working voltage is less than or equal to the preset reference voltage When the actual working voltage meets the preset rules.
  • the technical solution of the present application can be widely used in various display panels, such as twisted nematic (TN) display panels, in-plane switching (IPS) display panels, vertical alignment (Vertical Alignment, VA) ) Display panel, Multi-Domain Vertical Alignment (MVA) display panel, of course, it can also be other types of display panel, such as Organic Light-Emitting Diode (OLED) display panel.
  • TN twisted nematic
  • IPS in-plane switching
  • VA Vertical Alignment
  • MVA Multi-Domain Vertical Alignment
  • OLED Organic Light-Emitting Diode

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

公开了一种显示面板的驱动电路、驱动方法和显示装置。该驱动电路（300）包括栅极驱动电路(320)和电荷中和控制电路(330)，栅极驱动电路包括(320)多个栅极驱动信号输出端(321)，分别对应连接至显示面板（200）的多条栅极线(340)；该电荷中和控制电路(330)包括第一供电电路(350)、多个开关电路(332)和开关控制信号电路(360)。

Description

显示面板的驱动电路、驱动方法和显示装置
本申请要求于2019年6月27日提交中国专利局，申请号为201910564631.9，申请名称为“一种显示面板的驱动电路、驱动方法和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板的驱动电路、驱动方法和显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
TFT-LCD(Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示器)是当前平板显示的主要品种之一，已经成为了现代IT、视讯产品中重要的显示平台。TFT-LCD主要驱动原理，系统主板将R/G/B压缩信号、控制信号及电源通过线材与PCB板上的connector相连接，数据经过PCB板上的TCON(Timing Controller，时序控制器)IC处理后，经PCB板，通过S-COF(Source-Chip on Film，源级薄膜驱动芯片)和G-COF(Gate-Chip on Film，栅极薄膜驱动芯片)与显示面板的显示区连接，从而使得显示面板获得所需的电源、信号。
在实际应用中，如果像素电极内的电荷在关机时未完全释放，部分区域因为残余电荷提供的电压还会保持液晶分子的偏转，维持部分区域的画面显示，从而出现关机残影等问题。
发明内容
本申请的目的是提供一种改善关机残影的显示面板的驱动电路、驱动方法和显示装置。
本申请公开了一种显示面板的驱动电路，包括栅极驱动电路和电荷中和控制电路，所述栅极驱动电路包括多个栅极驱动信号输出端，所述多个栅极驱动信号输出端分别一一对应连接至所述显示面板的多条栅极线；所述电荷中和控制电路分别与所述多个栅极驱动信号输出端以及所述显示面板的多条栅极线连接；所述电荷中和控制电路包括第一供电电路、开关控制信号电路以及多个开关电路，所述第一供电电路提供一高电平信号；所述开关控制信号电路检测所述显示面板的实际工作电压，并根据实际工作电压输出开关控制信号，当实际工作电压出现降低时，说明显示面板已启动关机程序；所述多个开关电路的控制端连接所述开关控制信号电路的输出端，输入端连接于所述第一供电电路，输出端分别对应连接至多条所述栅极线；其中，当所述电荷中和控制电路的开关控制信号电路检测到所述实际工作电压符合 预设规则时，所述开关控制信号电路生成开关控制信号控制导通所述多个开关电路，所述高电平信号输出至所述显示面板的多条所述栅极线。
本申请还公开了一种显示面板的驱动电路的驱动方法，应用于上述的显示面板的驱动电路，包括步骤：
检测所述显示面板的实际工作电压，并根据实际工作电压是否满足预设规则对应输出不同的开关控制信号以控制多个开关电路的导通或关闭；
当实际工作电压不满足预设规则时，判定为正常工作状态，开关控制信号控制多个开关电路保持关闭状态，所述栅极驱动电路通过所述栅极驱动信号输出端输出栅极驱动信号至所述显示面板的栅极线；当实际工作电压满足预设规则时，判定为关机状态，开关控制信号控制多个开关电路导通，以将一高电平信号输出至显示面板的所有栅极线。
本申请还公开了一种显示装置，包括驱动电路和显示面板，所述驱动电路驱动所述显示面板显示。
本申请通过一电荷中和控制电路为所有的栅极线提供一高电平，在关机时，电荷中和控制电路接收到所述显示面板的实际工作电压时，生成开关控制信号控制导通所述多个分别对应控制显示面板的每一根栅极线的开关电路，每个开关电路的控制端分别对应连接至所述连接所述开关控制信号电路的输出端，输入端分别对应连接至一高电平，在显示面板正常工作时，所有的开关电路会保持关闭的状态，这样不会影响显示面板正常工作时输入到栅极线的电压，一旦关机，并检测到所述显示面板的实际工作电压会生成开关控制信号，开关电路就会一一开启，为所有的栅极线提供相同的电压，将所有的薄膜晶体管打开，从而将所有的像素电极内的电荷快速进行中合，改善局部画面显示的问题，从而改善关机残影。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请的一实施例的一种显示装置的示意图；
图2是本申请的一实施例的栅极驱动电路的示意图；
图3是本申请的一实施例的驱动信号的示意图；
图4是本申请的另一实施例的栅极驱动电路及其比较器的示意图；
图5是本申请的另一实施例的驱动信号的示意图；
图6是本申请的一实施例的栅极驱动电路、比较器及触发器的示意图；
图7是本申请的一实施例的驱动方法的示意图；
图8是本申请的另一实施例的驱动电路的示意图；
图9是本申请的另一实施例的驱动信号的示意图；
图10是本申请的一实施例的电荷中和控制电路及其反向器的示意图；
图11是本申请的一实施例的驱动方法的流程图。
具体实施方式
下需要理解的是，这里所使用的术语、公开的具体结构和功能细节，仅仅是为了描述具体实施例，是代表性的，但是本申请可以通过许多替换形式来具体实现，不应被解释成仅受限于这里所阐述的实施例。
在本申请的描述中，术语“第一”、“第二”仅用于描述目的，而不能理解为指示相对重要性，或者隐含指明所指示的技术特征的数量。由此，除非另有说明，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征；“多个”的含义是两个或两个以上。术语“包括”及其任何变形，意为不排他的包含，可能存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
另外，“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系的术语，是基于附图所示的方位或相对位置关系描述的，仅是为了便于描述本申请的简化描述，而不是指示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，或是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
下面参考附图和可选的实施例对本申请作进一步说明。
如图1至图3所示，本申请实施例公开了一种显示装置100，包括驱动电路300以及显示面板200，所述驱动电路300驱动所述显示面板200显示，驱动电路300包括栅极驱动电路320和电荷中和控制电路330，所述栅极驱动电路320包括多个栅极驱动信号输出端321，所述多个栅极驱动信号输出端321分别一一对应连接至所述显示面板200的多条栅极线340；所述电荷中和控制电路330分别与所述多个栅极驱动信号输出端以及所述显示面板的多条栅极线连接。
具体的，所述电荷中和控制电路330包括第一供电电路350、开关控制信号电路360以及多个开关电路332，所述第一供电电路提供一高电平信号(VGH)；所述开关控制信号电 路360接收所述显示面板的实际工作电压，生成开关控制信号并输出；多个开关电路332一一对应控制输出高电平信号到每条不同的栅极线340，控制端连接所述开关控制信号电路的输出端，输入端连接于所述第一供电电路，输出端分别一一对应连接至多条所述栅极线；其中，当所述电荷中和控制电路的开关控制信号电路检测到所述实际工作电压符合预设规则时，所述开关控制信号电路生成开关控制信号控制导通所述多个开关电路，并通过所述多个开关电路的多个输出端分别输出所述高电平信号至所述显示面板的多条栅极线，以打开所有栅极线340对应的所有的薄膜晶体管开关，使得显示面板200内的所有的像素电极内的电荷快速进行中合，防止关机时，电荷放电形成的压差而造成显示异常，例如画面拖影情况。
如图4至图5所示，为了使得开关电路332能够及时有效的导通，所述开关控制信号电路中还设置了一比较器333，所述比较器的第一输入端接收显示面板的实际工作电压，所述比较器的输出端分别对应连接至多个所述开关电路的多个控制端；所述比较器第二输入端连接一预设参考电压；其中，所述比较器接收所述显示面板的实际工作电压，将所述显示面板的实际工作电压与所述预设参考电压进行比较，并根据比较结果生成所述开关控制信号以控制所述开关电路导通或者关闭。
显示面板正常工作时的电压为额定工作电压，在关机或者出现电路短路等一些异常情况时，显示面板的实际工作电压会进行下降，为了防止接收到的关机时的电压不准确，不小心打开开关电路332而带来其他显示问题，将显示面板的实际工作电压与参考电压进行比较，根据比较结果输出高电平信号或低电平信号以控制所述开关电路332导通，十分方便快捷。需要说明的是，在设定预设参考电压时，会根据显示面板200的具体参数进行设置，不同的显示面板200参数不一样，设置的预设参考电压的具体大小不一致，所述预设参考电压大于所述额定工作电压的50％且小于所述额定工作电压的90％，且所述预设参考电压等于所述实际工作电压的90％是最优的，在这个范围内，可以防止关机时实际工作电压的电压下降太慢而导致开关比较器333未能及时做出反应。
进一步的需要说明的是，若比较器的第一输入端为正输入端，第二输入端为负输入端，此时所述开关电路332为低电平信号导通的开关，第一输入端采集实际工作电压(VGH1)，第二输入端连接一预设参考电压(Vref)，当实际工作电压的电压大于预设参考电压时输出高电平信号，此时开关电路332不需要进行导通，当实际工作电压小于预设参考电压时输出低电平信号，此时开关电路332可选择低电平信号导通的薄膜晶体管，则对应的开关电路为低电平信号导通开关。
另外，通过上述我们可以知道，实际工作电压小于预设参考电压时会生成开关控制信号控制导通所述多个开关电路，将所述高电平信号输出至多条所述栅极线，以打开显示面板内的所有薄膜晶体管，使得显示面板内所有的像素电极内的电荷进行中和，从而减少甚至消除 关机残影，因为实际工作电压回小于额定工作电压，故当实际工作电压只要等于预设参考电压，也可以判定显示面板已经处于关机模式中，此时也可以使用一电压侦测电路代替比较器，电压侦测电路判断实际工作电压是否等于预设参考电压，当实际工作电压只要等于预设参考电压时，会立即生成开关控制信号控制导通所述多个开关电路。
如图6至图7所示，所述开关控制信号电路还包括预设逻辑电平信号VDD和触发器，所述触发器的控制引脚连接所述比较器的输出端，所述触发器的输入引脚连接所述预设逻辑电平信号，所述触发器的输出引脚分别对应连接至多个所述开关电路的控制端；其中，所述比较器的输出端通过所述触发器对应连接至多个所述开关电路的多个控制端，当所述比较器输出比较结果触发所述触发器时，通过所述触发器生成开关控制信号以控制多个所述开关电路的导通或者关闭，此时，对于开关电路332来说，可以是高电平信号导通的薄膜晶体管，也可以是低电平信号导通的薄膜晶体管，具体可根据实际电路来做设定；需要说明的是，所述触发器334的控制引脚连接所述比较器333的输出端，所述触发器334的输入引脚连接一预设的逻辑电平的输出端，所述触发器334的输出引脚分别对应连接至多个所述开关电路332的多个控制端；其中，所述比较器的输出端通过所述触发器对应连接至多个所述开关电路的多个控制端，当所述比较器输出比较结果触发所述触发器时，通过所述触发器生成所述开关控制信号以控制多个所述开关电路的导通。上述的触发器334包括下降沿触发器，所述预设逻辑电平信号为逻辑高电平信号，所述开关电路包括高电平信号导通开关，所述高电平信号导通开关在接收高电平信号时导通，接收低电平信号时关断；
其中，所述比较器将所述实际工作电压与所述预设参考电压进行比较，根据比较结果输出一低电平信号触发所述触发器，所述触发器被触发后，输出一高电平信号的开关控制信号控制所述开关电路导通。
当然，如果比较器的第一输入端为负输入端，第二输入端为正输入端，当实际工作电压的电压大于预设参考电压时输出低电平信号，此时开关电路332不需要进行导通，当实际工作电压(VGH1)小于预设参考电压(Vref)时输出高电平信号，触发器334一选择为上升沿触发器，所述预设逻辑电平信号为逻辑高电平信号，所述开关电路包括高电平信号导通开关，所述高电平信号导通开关在接收高电平信号时导通，接收低电平信号时关断；所述比较器将所述实际工作电压与所述预设参考电压进行比较，根据比较结果输出一高电平信号触发所述触发器，所述触发器被触发后，输出一高电平信号的开关控制信号控制所述开关电路导通。
如图8至图9所示，作为本申请的另一实施例，与上述实施例不同的是，所述电荷中和控制电路330还包括触发器334，所述触发器334连通所述比较器333与多个所述开关电路332，所述触发器334的控制引脚连接所述比较器333的输出端，所述触发器334的输入引 脚连接一预设的逻辑高电平信号的输出端，所述触发器334的输出引脚分别对应连接至多个所述开关电路332的多个控制端；每个所述开关电路332的控制端分别对应连接到每个所述开关电路332的输入端，所述逻辑高电平信号可根据不同显示面板200的参数设定具体的值，逻辑高电平足以打开显示面板200内的所有的薄膜晶体管，将显示面板200内的所有像素电极的电荷进行中和。
在上述所有的实施例中，所述显示面板划分为显示区和非显示区，所述非显示区包括绑定区，所述栅极驱动电路和所述电荷中和控制电路分别通过所述绑定区绑定连接于所述显示面板，需要说明的是栅极驱动电路的多个输出引脚以及栅极驱动电路设置在覆晶薄膜上，电荷中和控制电路也可以设置在覆晶薄膜上，然后分别连接于所述输出引脚；或者可以设置在非显示区，与扇出区的扇出走线设置在不同的金属层，然后分别连接于多个输出引脚或者输出引脚和扫描线之间的扇出走线。
如图10所示，作为本申请的另一实施例，与上述实施例不同的是，用反向器335替代触发器334，所述电荷中和控制电路330包括反向器335，所述反向器335连通所述比较器333与多个所述开关电路332，所述反向器335的输入端连接所述比较器333的输出端，所述反向器335的输出端分别对应连接至多个所述开关电路332的多个控制端；其中，所述反向器根据接收的电平信号输出相反的电平信号，所述反向器根据所述比较器的比较生成所述开关控制信号以控制多个所述开关电路的导通。其中，所述反向器335根据接收的电平信号输出相反的电平信号，多个所述开关电路332在低电平信号时导通，当比较器输出低电平信号时，通过反向器335输出高电平信号，则开关电路332对应设置为高电平信号导通的薄膜晶体管，当比较器输出高电平信号时，通过反向器335输出低电平信号，则开关电路332对应设置为低电平信号导通的薄膜晶体管，只要能使开关电路332导通，输出高电平信号到所有的栅极线340都是可行的。
其中，本申请的驱动电路300还包括接地控制电路370，正常工作时，接地控制电路断开像素电极380和接地端的连接，在检测到关机时，在电荷中和控制电路330将高电平信号输出给所有栅极线340的同时，接地控制电路370导通将所有的像素电极380连接到接地端进行接地放电，以更好的消除残影，以达到更好的消除残影的效果。
对应的，如图11所示，公开了一种显示面板的栅极驱动电路的驱动方法，应用于上述实施例中的栅极驱动电路，包括步骤：
S1：检测显示面板的实际工作电压，并根据实际工作电压是否满足预设规则对应输出不同的开关控制信号以控制多个开关电路的导通或关闭；
S2：当实际工作电压不满足预设规则时，判定为正常工作状态，开关控制信号控制多个开关电路保持关闭状态，所述栅极驱动电路通过所述栅极驱动信号输出端输出栅极驱动信号 至所述显示面板的栅极线；当实际工作电压满足预设规则时，判定为关机状态，开关控制信号控制多个开关电路导通，以将一高电平信号输出至显示面板的所有栅极线。
主要通过在同一时间，导通所有的开关电路，从而同时输入高电平到每一条栅极线，以将显示面板内的所有的连接像素电极和栅极线的薄膜晶体管打开，将所有的像素电极内的电荷进行中和。
上述步骤中是否满足预设规则，通过实际工作电压与预设参考电压的比较来进行判定，所述显示面板正常工作状态时的电压为额定工作电压，所述预设参考电压大于所述额定工作电压的50％且小于所述额定工作电压的90％，当实际工作电压大于所述预设参考电压时，视实际工作电压不满足预设规则；当实际工作电压小于等于所述预设参考电压时，视实际工作电压满足预设规则时。
将实际工作电压的电压与预设参考电压进行比较，确定实际工作电压是否正确，防止因为电路中的一些电压在正常范围内的波动，而导致将所有的开关导通，造成栅极线之间的相互连通，从而带来显示异常的情况。
需要说明的是，本方案中涉及到的各步骤的限定，在不影响具体方案实施的前提下，并不认定为对步骤先后顺序做出限定，写在前面的步骤可以是在先执行的，也可以是在后执行的，甚至也可以是同时执行的，只要能实施本方案，都应当视为属于本申请的保护范围。
本申请的技术方案可以广泛用于各种显示面板，如扭曲向列型(Twisted Nematic，TN)显示面板、平面转换型(In-Plane Switching，IPS)显示面板、垂直配向型(Vertical Alignment，VA)显示面板、多象限垂直配向型(Multi-Domain Vertical Alignment，MVA)显示面板，当然，也可以是其他类型的显示面板，如有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板，均可适用上述方案。
以上内容是结合具体的可选的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (17)

  1. 一种显示面板的驱动电路，所述显示面板包括多条栅极线，所述驱动电路包括：
    栅极驱动电路，包括多个栅极驱动信号输出端，分别一一对应连接至所述显示面板的多条栅极线；以及
    电荷中和控制电路，输出端分别与多条所述栅极线连接；
    所述电荷中和控制电路包括：
    第一供电电路，提供一高电平信号；
    开关控制信号电路，检测所述显示面板的实际工作电压，并根据实际工作电压输出开关控制信号；以及
    多个开关电路，控制端连接所述开关控制信号电路的输出端，输入端连接于所述第一供电电路，输出端分别对应连接至多条所述栅极线；
    其中，当所述电荷中和控制电路的开关控制信号电路检测到所述实际工作电压符合预设规则时，所述开关控制信号电路生成开关控制信号控制导通所述多个开关电路，所述高电平信号输出至多条所述栅极线。
  2. 如权利要求1所述的一种显示面板的驱动电路，其中，所述开关控制信号电路包括比较器；
    所述比较器包括：
    第一输入端，接收显示面板的实际工作电压；
    第二输入端，连接一预设参考电压；以及
    输出端，分别对应连接至多个所述开关电路的多个控制端；
    其中，所述比较器接收所述显示面板的实际工作电压，将实际工作电压与所述预设参考电压进行比较，并根据比较结果生成所述开关控制信号以控制所述开关电路导通或者关闭。
  3. 如权利要求2所述的一种显示面板的驱动电路，其中，所述显示面板正常工作时的电压为额定工作电压，所述预设参考电压大于所述额定工作电压的50％且小于所述额定工作电压的90％；
    当所述实际工作电压小于所述预设参考电压时，判定满足所述预设规则。
  4. 如权利要求2所述的一种显示面板的驱动电路，其中，所述开关控制信号电路还包括：
    预设逻辑电平信号；以及
    触发器，控制引脚连接所述比较器的输出端，输入引脚连接所述预设逻辑电平信号，输出引脚分别对应连接至多个所述开关电路的控制端；
    其中，所述比较器的输出端通过所述触发器对应连接至多个所述开关电路的控制端，当所述比较器的输出触发所述触发器时，通过所述触发器生成所述开关控制信号以控制多个所述开关电路的导通或者关闭。
  5. 如权利要求4所述的一种显示面板的驱动电路，其中，所述触发器包括下降沿触发器，所述预设逻辑电平信号为逻辑高电平信号，所述开关电路包括高电平信号导通开关，所述高电平信号导通开关在接收高电平信号时导通，接收低电平信号时关断；
    其中，所述比较器将所述实际工作电压的电压与所述预设参考电压进行比较，当所述比较器根据比较结果输出一低电平信号时，所述触发器被触发，所述触发器输出一高电平信号的开关控制信号控制所述开关电路导通。
  6. 如权利要求2所述的一种显示面板的驱动电路，其中，所述显示面板划分为显示区和非显示区，所述非显示区包括绑定区，所述栅极驱动电路和所述电荷中和控制电路分别通过所述绑定区绑定连接于所述显示面板的多条所述栅极线。
  7. 如权利要求2所述的一种显示面板的驱动电路，其中，所述开关控制信号电路还包括：
    触发器，控制引脚连接所述比较器的输出端，输入引脚连接所述第一供电电路的输出端，输出引脚分别对应连接至多个所述开关电路的控制端；
    每个所述开关电路的控制端和输入端分别相互连通。
  8. 如权利要求2所述的一种显示面板的驱动电路，其中，所述第一输入端为正输入端，所述第二输入端为负输入端，所述开关电路为低电平信号导通的开关。
  9. 如权利要求1所述的一种显示面板的驱动电路，其中，所述开关控制信号电路包括侦测电路，所述侦测电路判断所述显示面板的实际工作电压是否等于所述预设参考电压进行比较，当实际工作电压只要等于预设参考电压时，会立即生成开关控制信号控制导通所述多个开关电路。
  10. 如权利要求1所述的一种显示面板的驱动电路，其中，所述电荷中和控制电路包括触发器，所述触发器连通所述比较器与多个所述开关电路，所述触发器的控制引脚连接所述比较器的输出端，所述触发器的输入引脚连接一预设的逻辑高电平信号的输出端，所述触发器的输出引脚分别对应连接至多个所述开关电路的多个控制端；每个所述开关电路的控制端分别对应连接到每个所述开关电路的输入端。
  11. 如权利要求1所述的一种显示面板的驱动电路，其中，所述电荷中和控制电路包括反向器，所述反向器连通所述比较器与多个所述开关电路，所述反向器的输入端连接所述比较器的输出端，所述反向器的输出端分别对应连接至多个所述开关电路的多个控制端；
    其中，所述反向器根据接收的电平信号输出相反的电平信号，所述反向器根据所述比较 器的比较结果生成所述开关控制信号以控制多个所述开关电路的导通。
  12. 如权利要求1所述的一种显示面板的驱动电路，其中，所述驱动电路还包括接地控制电路，正常工作时，所述接地控制电路断开像素电极和接地端的连接。
  13. 一种显示面板的驱动方法，所述显示面板包括多个开关电路、栅极驱动电路以及多条栅极线，所述驱动方法包括步骤：
    检测显示面板的实际工作电压，并根据实际工作电压是否满足预设规则对应输出不同的开关控制信号以控制多个开关电路的导通或关闭；
    当实际工作电压不满足预设规则时，判定为正常工作状态，开关控制信号控制所述多个开关电路保持关闭状态，所述栅极驱动电路通过所述栅极驱动信号输出端输出栅极驱动信号至所述显示面板的栅极线；当实际工作电压满足预设规则时，判定为关机状态，开关控制信号控制所述多个开关电路导通，以将一高电平信号输出至所述显示面板的所述多条栅极线。
  14. 如权利要求13所述的一种显示面板的驱动方法，其中，所述检测显示面板的实际工作电压，并根据实际工作电压是否满足预设规则对应输出不同的开关控制信号以控制多个开关电路的关闭或导通的步骤包括：
    当实际工作电压大于所述预设参考电压时，视实际工作电压不满足预设规则；当实际工作电压小于所述预设参考电压时，视实际工作电压满足预设规则时；
    其中，所述显示面板正常工作状态时的电压为额定工作电压，所述预设参考电压大于所述额定工作电压的50％且小于所述额定工作电压的90％。
  15. 如权利要求14所述的一种显示面板的驱动方法，其中，所述驱动电路包括开关控制信号电路以及开关电路，所述开关控制信号电路包括触发器，检测显示面板的实际工作电压，并根据实际工作电压是否满足预设规则对应输出不同的开关控制信号以控制多个开关电路的导通或关闭的步骤中包括：
    所述比较器的输出信号触发所述触发器时，通过所述触发器生成所述开关控制信号以控制多个所述开关电路的导通或者关闭。；
    当满足所述预设规则时，输出高电平信号，所述触发器生成高电平信号以控制多个所述开关电路导通；
    当不满足所述预设规则时，输出低电平信号，所述触发器生成低电平信号以控制多个所述开关电路关闭。
  16. 一种显示装置，包括显示面板和驱动电路，所述驱动电路驱动所述显示面板显示，所述显示面板包括多条栅极线，所述驱动电路包括：
    栅极驱动电路，包括多个栅极驱动信号输出端，分别一一对应连接至所述显示面板的多条栅极线；以及
    电荷中和控制电路，输出端分别与多条所述栅极线连接；
    所述电荷中和控制电路包括：
    第一供电电路，提供一高电平信号；
    开关控制信号电路，检测所述显示面板的实际工作电压，并根据实际工作电压输出开关控制信号；以及
    多个开关电路，控制端连接所述开关控制信号电路的输出端，输入端连接于所述第一供电电路，输出端分别对应连接至多条所述栅极线；
    其中，当所述电荷中和控制电路的开关控制信号电路检测到所述实际工作电压符合预设规则时，所述开关控制信号电路生成开关控制信号控制导通所述多个开关电路，所述高电平信号输出至多条所述栅极线。
  17. 如权利要求16所述的一种显示装置，其中，所述开关控制信号电路包括比较器；
    所述比较器包括：
    第一输入端，接收显示面板的实际工作电压；
    第二输入端，连接一预设参考电压；以及
    输出端，分别对应连接至多个所述开关电路的多个控制端；
    其中，所述第一输入端为正输入端，所述第二输入端为负输入端，所述开关电路为低电平信号导通的开关；所述比较器接收所述显示面板的实际工作电压，将实际工作电压与所述预设参考电压进行比较，并根据比较结果生成所述开关控制信号以控制所述开关电路导通或者关闭。
PCT/CN2020/097667 2019-06-27 2020-06-23 显示面板的驱动电路、驱动方法和显示装置 Ceased WO2020259484A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910564631.9A CN110459184A (zh) 2019-06-27 2019-06-27 一种显示面板的驱动电路、驱动方法和显示装置
CN201910564631.9 2019-06-27

Publications (1)

Publication Number Publication Date
WO2020259484A1 true WO2020259484A1 (zh) 2020-12-30

Family

ID=68481150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/097667 Ceased WO2020259484A1 (zh) 2019-06-27 2020-06-23 显示面板的驱动电路、驱动方法和显示装置

Country Status (2)

Country Link
CN (1) CN110459184A (zh)
WO (1) WO2020259484A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114283757A (zh) * 2021-12-29 2022-04-05 绵阳惠科光电科技有限公司 驱动电路和显示装置
CN116189602A (zh) * 2021-11-26 2023-05-30 西安钛铂锶电子科技有限公司 显示驱动芯片和led灯板

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110459184A (zh) * 2019-06-27 2019-11-15 惠科股份有限公司 一种显示面板的驱动电路、驱动方法和显示装置
CN111161687A (zh) * 2019-12-12 2020-05-15 广州视源电子科技股份有限公司 一种电荷释放方法、装置、存储介质及电子设备
CN115472125B (zh) 2022-08-26 2024-02-27 惠科股份有限公司 显示面板的驱动电路和显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080042952A1 (en) * 2006-08-18 2008-02-21 Innocom Technology (Shenzhen) Co., Ltd. Power supply circuit of liquid crystal display for reducing residual image
CN106097973A (zh) * 2016-08-25 2016-11-09 深圳市华星光电技术有限公司 一种用于驱动amoled像素的电路
CN206532567U (zh) * 2017-01-04 2017-09-29 昆山龙腾光电有限公司 一种关机残影消除电路及具有其的液晶显示器
CN109087613A (zh) * 2018-10-29 2018-12-25 惠科股份有限公司 过流保护电路及显示驱动装置
CN110459184A (zh) * 2019-06-27 2019-11-15 惠科股份有限公司 一种显示面板的驱动电路、驱动方法和显示装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM499666U (zh) * 2015-01-23 2015-04-21 Aces Electronics Co Ltd 電連接器之結構改良
CN104778933B (zh) * 2015-04-15 2017-04-19 昆山龙腾光电有限公司 电源管理电路
CN204558001U (zh) * 2015-04-16 2015-08-12 昆山龙腾光电有限公司 关机残影消除电路及栅极驱动电路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080042952A1 (en) * 2006-08-18 2008-02-21 Innocom Technology (Shenzhen) Co., Ltd. Power supply circuit of liquid crystal display for reducing residual image
CN106097973A (zh) * 2016-08-25 2016-11-09 深圳市华星光电技术有限公司 一种用于驱动amoled像素的电路
CN206532567U (zh) * 2017-01-04 2017-09-29 昆山龙腾光电有限公司 一种关机残影消除电路及具有其的液晶显示器
CN109087613A (zh) * 2018-10-29 2018-12-25 惠科股份有限公司 过流保护电路及显示驱动装置
CN110459184A (zh) * 2019-06-27 2019-11-15 惠科股份有限公司 一种显示面板的驱动电路、驱动方法和显示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116189602A (zh) * 2021-11-26 2023-05-30 西安钛铂锶电子科技有限公司 显示驱动芯片和led灯板
CN114283757A (zh) * 2021-12-29 2022-04-05 绵阳惠科光电科技有限公司 驱动电路和显示装置
CN114283757B (zh) * 2021-12-29 2023-08-25 绵阳惠科光电科技有限公司 驱动电路和显示装置

Also Published As

Publication number Publication date
CN110459184A (zh) 2019-11-15

Similar Documents

Publication Publication Date Title
WO2020259484A1 (zh) 显示面板的驱动电路、驱动方法和显示装置
US9997117B2 (en) Common circuit for GOA test and eliminating power-off residual images
KR101931335B1 (ko) 액정표시장치의 레벨 시프터
US11966128B2 (en) Display panel static electricity protection device, static electricity protection method, and display device
US9886879B2 (en) Liquid crystal display and method for testing liquid crystal display
CN109377952B (zh) 一种显示装置的驱动方法、显示装置和显示器
US11488556B2 (en) Drive circuitry of display panel for detecting a logic voltage of a logic signal receiving terminal and controlling a power terminal of a driving chip to be connected to or disconnected from a power ouput terminal of a power chip depending on a magnitude of the logic signal and display device
US11450292B2 (en) Charge sharing circuit and method for liquid crystal display panel to improve display effect
CN105679266B (zh) 关机用电路、外围驱动装置和液晶面板
US10311766B2 (en) Test circuit for in-cell touch screen
CN109461415B (zh) 一种显示面板的驱动电路和显示面板
CN104505016A (zh) 显示驱动电路、显示驱动装置、显示装置及驱动方法
CN106057151A (zh) 一种显示装置、液晶显示器以及消除残影的方法
WO2020062336A1 (zh) 一种 goa 检测电路及其测试方法
US20190213968A1 (en) Array substrate, method for driving the same, and display apparatus
US20210020119A1 (en) Display device driving method, and display device
CN116543716B (zh) 显示面板的驱动方法、公共电压输出电路及显示面板
CN106338870A (zh) 一种静电防护电路及液晶显示器
CN104795038B (zh) 一种液晶面板的驱动电路
US20210225244A1 (en) Drive circuit and display panel
CN108172184A (zh) 关机放电电路和显示模组
CN104678621B (zh) 液晶显示装置
KR101992852B1 (ko) 표시장치
CN104575435A (zh) 显示基板栅极线驱动方法及驱动单元、显示装置
US20210318581A1 (en) Electrostatic discharge (esd) protection structure and display panel

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20830958

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20830958

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 02.06.2022)

122 Ep: pct application non-entry in european phase

Ref document number: 20830958

Country of ref document: EP

Kind code of ref document: A1