WO2014183336A1 - 栅极驱动电压供应装置、供应方法及显示装置 - Google Patents

栅极驱动电压供应装置、供应方法及显示装置 Download PDF

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Publication number
WO2014183336A1
WO2014183336A1 PCT/CN2013/079714 CN2013079714W WO2014183336A1 WO 2014183336 A1 WO2014183336 A1 WO 2014183336A1 CN 2013079714 W CN2013079714 W CN 2013079714W WO 2014183336 A1 WO2014183336 A1 WO 2014183336A1
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Prior art keywords
voltage
preset
preset voltage
gate
gate drive
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PCT/CN2013/079714
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English (en)
French (fr)
Inventor
赖意强
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京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Priority to US14/375,356 priority Critical patent/US9899997B2/en
Publication of WO2014183336A1 publication Critical patent/WO2014183336A1/zh

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
    • H03K17/0412—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the control circuit
    • H03K17/04123—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the control circuit in field-effect transistor switches
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G3/34—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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
    • H03K17/08122—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit in field-effect transistor switches
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0871—Several active elements per pixel in active matrix panels with level shifting
    • 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
    • G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a gate driving voltage supply device, a gate driving voltage supply method, and a display device using the same.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • a gate driving voltage supply device In order to control the switching of the thin film transistor, a gate driving voltage supply device generally provides a gate starting voltage V QN to the gate driving integrated circuit, and a gate starting voltage V QN is generally between 18V and 30V, and the specific voltage value is dependent on the film. Depending on the specific design of the transistor.
  • the multi-gradation gate (MLG) driving technique is often used, that is, the gate start voltage V QN is processed by the multi-gradation gate drive integrated circuit (MLG IC). .
  • the first preset voltage V CH may drop to a second preset voltage V eH , wherein the second preset voltage V eH is lower than the first preset voltage V.
  • the second preset voltage V. H the thin film transistor is not turned off, so that the output waveform of the gate drive integrated circuit has a slope chamfering waveform, as shown in FIG. 2 .
  • the recovery time t will affect the charging time of the liquid crystal display panel. Especially in the products displaying the high frame rate picture, since the charging time of the driving thin film transistor itself is seriously insufficient, the length of the recovery time t is even more special. Important.
  • a gate driving voltage supply device and a gate driving voltage supply method capable of shortening a time required for the gate starting voltage to be restored to the first predetermined voltage VTM by the second predetermined voltage V eH are urgently needed.
  • the technical problem to be solved by the present invention is to provide a second preset voltage V that can shorten the gate starting voltage. H , return to the first preset voltage V.
  • the gate driving voltage supply device of H takes time, thereby avoiding affecting the charging time of the liquid crystal display panel, accelerating the reaction speed, and improving the display quality of the screen.
  • the present invention provides a gate driving voltage supply method and a display device to which the gate driving voltage supply device is applied.
  • a gate driving voltage supply device includes:
  • Activating a voltage output module configured to output a gate start voltage to the gate driving integrated circuit;
  • the gate starting voltage includes a first preset voltage and a second preset voltage lower than the first preset voltage;
  • a startup voltage boosting module connected to the startup voltage output module, configured to: when the second preset voltage is restored to the first preset voltage, boost the second preset voltage to be higher than a predetermined time A third preset voltage of the first preset voltage is described.
  • the starting voltage boosting module includes a voltage regulating unit and a switching unit; the voltage regulating unit is connected to the starting voltage output module for boosting the second preset voltage to the three preset voltages;
  • the switch unit is connected to the voltage regulating unit for periodically turning on and off the voltage regulating unit.
  • the startup voltage output module includes a charge pump circuit;
  • the charge pump circuit includes a charge pump, a charge pump modulator, and a reference voltage terminal;
  • An output end of the charge pump is connected to the gate driving integrated circuit, and an output end of the charge pump is further connected to the reference voltage end through a voltage dividing resistor;
  • the reference voltage terminal is further connected to the voltage regulating unit, and the reference voltage terminal is used for providing a reference voltage
  • the charge pump modulator is coupled to the input of the charge pump for controlling the charge pump output gate enable voltage based on the reference voltage and a voltage boosted by the voltage regulator unit.
  • the voltage regulating unit includes a protection resistor connected in parallel with the reference voltage terminal to And a boosting resistor, the switching unit is disposed on a path of the boosting resistor and the reference voltage terminal.
  • the voltage regulating unit includes a protection resistor connected in series with the reference voltage terminal and a boosting resistor, and the switching unit is connected in parallel at both ends of the boosting resistor. Timing controller.
  • the switching element is a thin film transistor.
  • the gate drive integrated circuit is a multi-gradation gate drive integrated circuit.
  • the embodiment of the invention also provides a gate driving voltage supply method:
  • a gate driving voltage supply method includes the steps of outputting a gate start voltage to a gate driving integrated circuit, the gate starting voltage comprising a first preset voltage and a second pre-lower than the first preset voltage And setting a voltage; when the second preset voltage is restored to the first preset voltage, boosting the second preset voltage to a third preset voltage higher than the first preset voltage within a predetermined time.
  • the timing controller applies a control signal to control the voltage regulating unit to raise the second preset voltage to the third preset voltage, and maintain the predetermined time.
  • Embodiments of the present invention also provide a display device including any of the above-described gate driving voltage supply devices.
  • the gate driving voltage supply device provided by the embodiment of the present invention is configured to set a start voltage boosting module connected to the startup voltage output module, and use the startup voltage boosting module to return to the first preset voltage when the second preset voltage is restored to the predetermined voltage.
  • the second preset voltage is preliminarily raised to a third preset voltage higher than the first preset voltage for a period of time, and the gate start voltage is restored from the second preset voltage to the first by the third preset voltage having a higher voltage.
  • the time required for the preset voltage is obtained, so that the reaction speed is accelerated, the problem of slow recovery due to excessive load, the charging time of the liquid crystal display panel, and the beneficial technical effect of improving the display quality of the screen are obtained.
  • FIG. 1 is a schematic diagram of a waveform of a gate start voltage in the prior art
  • 2 is a schematic diagram of an output waveform of a gate driving integrated circuit in the prior art
  • FIG. 3 is a schematic diagram of a waveform recovered from a second preset voltage to a first predetermined voltage in the prior art
  • FIG. 4 is a schematic diagram of a waveform recovered from a second preset voltage to a first preset voltage in an embodiment of the present invention
  • FIG. 5 is a schematic structural view of a gate driving voltage supply device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a specific implementation manner of the gate driving voltage supply device of FIG. 5;
  • Fig. 7 is a timing chart showing the control timing of a gate driving voltage supply method in the embodiment of the present invention.
  • the gate driving voltage supply device mainly comprises: a starting voltage output module and a starting voltage boosting module connected to the starting voltage output module; and a starting voltage output module for outputting the gate starting voltage V QN to the gate driving integrated circuit
  • the gate driving integrated circuit uses a multi-gradation gate driving integrated circuit; the gate starting voltage v QN includes a first predetermined voltage VTM for modulating the chamfer and a lower than the first preset voltage V CH The second preset voltage V eH , .
  • the gate start voltage V QN is from the second preset voltage V. H , to restore to the first preset voltage V.
  • the set start voltage boosting module presets the second preset voltage V for a predetermined period of time when the second preset voltage V eH is restored to the first preset voltage V eH . . H , raised to a higher than the first preset voltage V.
  • the third preset voltage V eH of the H after a predetermined period of time, the third preset voltage V eH , falls to the first preset voltage V GH ; the size of the third preset voltage V GH , , and The length of the duration is set according to actual needs to achieve the best results. For example, when the third preset voltage V CH , is large, the duration can be appropriately shortened. As shown in Figure 4, the third pre-high voltage Set the voltage V. H , , can shorten the gate start voltage by the second preset voltage V.
  • the startup voltage boosting module in this embodiment includes a voltage regulating unit and a switching unit; and the voltage regulating unit is connected to the startup voltage output module for boosting the second preset voltage V. H , up to the first preset voltage V.
  • the switch unit is connected to the voltage regulating unit, and is used for timingly turning on and off the voltage regulating unit, thereby making the third preset voltage
  • V G Dust is maintained for a predetermined period of time, after a predetermined time elapses, the voltage regulating unit is turned off, so that the gate starting voltage V QN remains the first predetermined voltage V CH .
  • the charge pump uses capacitors to store energy and has few external components, it is very suitable for use in portable devices; and with its continuous improvement in circuit structure and process level, it can also be used in application circuits that require large currents. Therefore, the high-efficiency charge pump circuit has been widely used in power management circuits due to its low power consumption, low cost, small structure, few required peripheral components, and high electromagnetic interference suppression.
  • the startup voltage output module in this embodiment includes a charge pump circuit; a gate startup voltage V is generated by a charge pump circuit. N.
  • the charge pump circuit comprises a charge pump, a charge pump modulator, a voltage dividing resistor R1 and a reference voltage terminal D; the input end of the charge pump is connected to the AVDD terminal providing the original power source, and the output terminal is connected to the gate driving integrated circuit, the charge pump The output terminal is connected to the reference voltage terminal D through a voltage dividing resistor R1; the reference voltage terminal D is also connected to the voltage regulating unit, the reference voltage terminal D is used to supply the reference voltage V REF ; and the charge pump modulator is disposed in the power management unit (not Among them, it is connected to the input end of the charge pump for controlling the gate start voltage V QN of the charge pump output according to the reference voltage V REF and the voltage boosted by the voltage regulator unit.
  • the voltage regulating unit can be implemented in various ways: For example, as shown in FIG. 6, the voltage regulating unit includes a protection resistor R2 connected in parallel with the reference voltage terminal D and a boosting resistor R3, and the switching unit is disposed on the boosting resistor R3 and the reference. On the path of the voltage terminal D. After the charge pump circuit outputs the gate start voltage V QN , it is fed back to the power management unit through the resistor divider R1 , and the feedback output terminal (not shown) of the power management unit provides a fixed reference voltage V REF for the reference voltage terminal D (generally 1. 25V), and then through the charge pump modulator inside the power management unit to adjust the output pulse width, thereby stabilizing the output of the gate start voltage V QN .
  • V REF fixed reference voltage
  • V REF for the reference voltage terminal D
  • ⁇ « voltage Can be calculated as follows:
  • V 0N V REF x (1+R1 /R2)
  • V 0N voltage is greater than the gate start voltage V QN output when the switching unit is turned off.
  • R2 ⁇ R3 represents the resistance value when R2 is connected in parallel with R3, and the resistance of (R2 ⁇ R3) is equal to R2 X R3/ ( R2+R3 ) 0
  • the voltage regulating unit includes a protection resistor R2 connected in series with the reference voltage terminal D, and a boosting resistor R3, and the switching unit is connected in parallel across the boosting resistor R3.
  • the V QN voltage can be calculated as follows:
  • V 0N V REF X (1+R1 / (R2'+R3' ) )
  • V 0N V REF x (1+R1 /R2' )
  • the voltage regulator unit includes the protection resistor R2 and the step-up resistor R3 connected in parallel with the reference voltage terminal D, and the switch unit is set. On the path of the boosting resistor R3 and the reference voltage terminal D.
  • the switch unit can be timed on for a predetermined time to increase the second preset voltage V for a predetermined time. H , up to the first preset voltage V. Third preset voltage of H
  • the switching unit in this embodiment includes a switching element T1 and a timing controller T-C0N connected to the switching element T1.
  • the switching element is preferably a thin film transistor, and may be an N-type thin film transistor or a P-type thin film transistor, or For other forms of switches.
  • the embodiment of the present invention further provides a gate driving voltage supply method.
  • One of the main improvement points of the gate driving voltage supply method in the prior art is that when the second preset voltage V EH is restored to the first When the preset voltage V EH is set, the second preset power is raised within a predetermined time. Press V. H , up to the first preset voltage V.
  • the gate driving voltage supply device and the gate driving voltage supply method will be described in detail in conjunction with FIG.
  • the switching time of the thin film transistor T1 is controlled by the timing controller T-C0N applying the control signal 0E3, thereby controlling the voltage regulating unit to improve the second pre-control Setting the voltage V eH to the third preset voltage V eH , and maintaining for a predetermined time; therefore, the gate start voltage can be shortened by the second preset voltage by the third preset voltage V GH having a higher voltage V. H , return to the first preset voltage V. H time required.
  • the gate start voltage V QN is input to the multi-gradation gate drive integrated circuit, and the multi-gradation gate drive integrated circuit further receives two inputs, one for the second preset voltage V eH , for setting The output is to be dropped to the voltage, and the other is the control signal 0E2 applied by the timing controller T-C0N for controlling the drop to the second preset voltage V.
  • H the timing of the time, so that the required gate output voltage V QUT can be generated, and the associated waveform diagram of the gate output voltage V QUT is as shown in FIG. 7 .
  • Embodiments of the present invention also provide a display device including the above-described gate driving voltage supply device.
  • the gate start voltage V is shortened due to the gate drive voltage supply device employed.
  • N is determined by the second predetermined voltage V. H , return to the first preset voltage V.
  • the time required for H speeds up the reaction speed, thereby avoiding the problem of slow recovery due to excessive load, increasing the charging time of the liquid crystal display panel, and improving the display quality of the screen; especially in products displaying high frame rate pictures.

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

Abstract

提供了一种栅极驱动电压供应装置、栅极驱动电压供应方法及应用该栅极驱动电压供应装置的显示装置。栅极驱动电压供应装置设置与启动电压输出模块连接的启动电压提升模块。启动电压提升模块在第二预设电压恢复至第一预设电压时，于预定的一段时间内将第二预设电压预先提升至高于第一预设电压的第三预设电压。借助电压较高的第三预设电压缩短栅极启动电压由第二预设电压恢复至第一预设电压所需的时间，加快反应速度，从而避免因负载过大而恢复过慢的问题，增加了液晶显示面板的充电时间，提升了画面显示品质。

Description

栅极驱动电压供应装置、 供应方法及显示装置
技术领域
本发明涉及显示技术领域，具体涉及一种栅极驱动电压供应装置、 栅极驱动电压供应方法及应用该栅极驱动电压供应装置的显示装置。
背景技术
薄膜晶体管液晶显示器 ( Thin Fi lm Trans i s tor-Liquid Crys ta l Di splay, TFT-LCD ) 由于具有画面稳定、 图像逼真、 消除辐射、 节省 空间以及节省能耗等优点， 被广泛应用于电视、 手机、 显示器等电子 产品中， 已占据了平面显示领域的主导地位。
为了控制薄膜晶体管的开关， 通常会有栅极驱动电压供应装置提 供栅极启动电压 VQN至栅极驱动集成电路,栅极启动电压 VQN—般在 18V 一 30V之间， 具体电压值依薄膜晶体管的具体设计而定。 为了降低画 面闪烁， 经常会使用多灰度等级栅极 ( Mul t i Level Gate, MLG )驱动 技术， 即通过多灰度等级栅极驱动集成电路（MLG IC ) 的对栅极启动 电压 VQN进行处理。 具体如图 1 中所示： 在特定时间， 第一预设电压 VCH会下降至第二预设电压 VeH，， 其中第二预设电压 VeH， 低于第一预设 电压 V。H,但第二预设电压 V。H，还不会造成薄膜晶体管呈现关闭的状态， 从而使得栅极驱动集成电路的输出波形会有个斜率削角的波形， 具体 如图 2 中所示。 当第二预设电压 VeH， 要恢复到第一预设电压 VeH时， 因为存在负载的原因， 会有一定的恢复时间， 如图 3中所示的恢复时 间 t。 恢复时间 t的长短会影响到液晶显示面板的充电时间， 尤其是 在显示高帧率画面的产品中， 由于驱动薄膜晶体管本身的充电时间已 严重不足， 因此， 恢复时间 t的长短便更显得格外重要了。
综上所述， 一种能够缩短栅极启动电压由第二预设电压 VeH， 恢复 至第一预设电压 V™所需时间的栅极驱动电压供应装置及栅极驱动电 压供应方法是亟待提供的。 发明内容
本发明要解决的技术问题在于提供一种能够缩短栅极启动电压由 第二预设电压 V。H， 恢复至第一预设电压 V。H所需时间的栅极驱动电压 供应装置， 从而避免影响液晶显示面板的充电时间， 加快反应速度， 提升画面显示品质。 进一步地， 本发明提供一种栅极驱动电压供应方 法以及应用该栅极驱动电压供应装置的显示装置。
本发明实施例采用的技术方案如下：
一种栅极驱动电压供应装置， 包括：
启动电压输出模块，用于输出栅极启动电压至栅极驱动集成电路； 所述栅极启动电压包括第一预设电压和低于所述第一预设电压的第二 预设电压；
还包括：
启动电压提升模块： 与所述启动电压输出模块连接， 用于在所述 第二预设电压恢复至所述第一预设电压时， 于预定时间内提升所述第 二预设电压至高于所述第一预设电压的第三预设电压。
优选地， 所述启动电压提升模块包括调压单元以及开关单元； 所述调压单元， 与所述启动电压输出模块连接， 用于提升所述第 二预设电压至所述三预设电压；
所述开关单元， 与所述调压单元连接， 用于定时接通与关断所述 调压单元。
优选地， 所述启动电压输出模块包括电荷泵电路； 所述电荷泵电 路包括电荷泵、 电荷泵调变器以及基准电压端；
所述电荷泵的输出端与栅极驱动集成电路连接， 所述电荷泵的输 出端还通过分压电阻与所述基准电压端连接；
所述基准电压端还与所述调压单元连接， 所述基准电压端用于提 供基准电压；
所述电荷泵调变器与所述电荷泵的输入端连接， 用于根据所述基 准电压以及调压单元提升的电压控制所述电荷泵输出栅极启动电压。
优选地， 所述调压单元包括并联在所述基准电压端的保护电阻以 及升压电阻， 所述开关单元设置在所述升压电阻与基准电压端的通路 上。
优选地， 所述调压单元包括串联在所述基准电压端的保护电阻以 及升压电阻， 所述开关单元并联在所述升压电阻的两端。 时序控制器。
优选地， 所述开关元件为薄膜晶体管。
优选地，所述栅极驱动集成电路为多灰度等级栅极驱动集成电路。 本发明实施例还提供了一种栅极驱动电压供应方法：
一种栅极驱动电压供应方法， 包括输出栅极启动电压至栅极驱动 集成电路的步骤， 所述栅极启动电压包括第一预设电压和低于所述第 一预设电压的第二预设电压； 在所述第二预设电压恢复至所述第一预 设电压时， 在预定时间内提升所述第二预设电压至高于所述第一预设 电压的第三预设电压。
优选的， 在第二预设电压恢复至第一预设电压时， 通过时序控制 器施加控制信号控制调压单元提升第二预设电压至所述第三预设电 压， 并维持一所述预定时间。
本发明实施例还提供了一种包括上述任意一种栅极驱动电压供应 装置的显示装置。
本发明实施例所提供的栅极驱动电压供应装置通过设置与启动电 压输出模块连接的启动电压提升模块， 利用启动电压提升模块在第二 预设电压恢复至第一预设电压时， 于预定的一段时间内将第二预设电 压预先提升至高于第一预设电压的第三预设电压， 借助电压较高的第 三预设电压缩短栅极启动电压由第二预设电压恢复至第一预设电压所 需的时间， 从而获得加快反应速度， 避免因负载过大而恢复过慢的问 题， 增加液晶显示面板的充电时间， 提升画面显示品质的有益技术效 果。
附图说明
图 1是现有技术中栅极启动电压的波形示意图； 图 2是现有技术中栅极驱动集成电路的输出波形示意图； 图 3是现有技术中由第二预设电压恢复至第一预设电压的波形示 意图；
图 4是本发明实施例中由第二预设电压恢复至第一预设电压的波 形示意图；
图 5 是本发明实施例中一种栅极驱动电压供应装置的结构示意 图；
图 6是图 5中栅极驱动电压供应装置的一种具体实现方式的结构 示意图；
图 7是本发明实施例中一种栅极驱动电压供应方法的控制时序示 意图。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式做进一步描述。 以下实施例仅用于说明本发明， 但不用来限制本发明的范围。
本发明所提供的栅极驱动电压供应装置主要包括， 启动电压输出 模块以及与启动电压输出模块连接的启动电压提升模块； 启动电压输 出模块用于输出栅极启动电压 VQN至栅极驱动集成电路，为了降低画面 闪烁， 栅极驱动集成电路使用多灰度等级栅极驱动集成电路； 栅极启 动电压 vQN包括调制削角的第一预设电压 V™和低于第一预设电压 VCH的 第二预设电压 VeH，。 如图 3所示， 现有技术中， 当栅极启动电压 VQN从 第二预设电压 V。H， 要恢复到第一预设电压 V。H时， 如果存在负载， 则 会有一定的恢复时间 t , 该时间通常较长， 会影响到液晶显示面板的 充电时间。 本发明的主要改进点之一在于， 设置的启动电压提升模块 在第二预设电压 VeH， 恢复至第一预设电压 VeH时， 于预定的一段时间 内预先将第二预设电压 V。H， 提升至高于第一预设电压 V。H的第三预设 电压 VeH，，， 在预定的一段时间过后， 第三预设电压 VeH，， 降至第一预 设电压 VGH; 第三预设电压 VGH，， 的大小以及持续时间的长短根据实际 需求来具体设定从而达到最优的效果。 例如， 在第三预设电压 VCH，， 较大时， 可以适当缩短持续时间。 如图 4中所示， 电压较高的第三预 设电压 V。H，， 可以缩短栅极启动电压由第二预设电压 V。H， 恢复至第一 预设电压 VCH所需的时间， 可以看出， 在存在负载的情况下， 效果非常 显著， 可以大幅度缩短栅极启动电压由第二预设电压 V。H， 恢复至第一 预设电压 VeH所需的时间。
如图 5中所示， 本实施例中的启动电压提升模块包括调压单元以 及开关单元； 调压单元与启动电压输出模块连接， 用于提升第二预设 电压 V。H， 至高于第一预设电压 V。H的第三预设电压 V。H，，； 开关单元与 调压单元连接， 用于定时接通与关断调压单元， 从而使第三预设电压
VG„" 维持一个预定的时间段， 在预定的时间过后， 关断调压单元， 使 栅极启动电压 VQN仍为第一预设电压 VCH。
由于电荷泵采用电容储存能量， 外接组件少， 非常适合用于便携 式设备中； 并且随着其电路结构的不断改进和工艺水平的提高， 也可 应用在需要较大电流的应用电路中。 因此高效率电荷泵电路因其功耗 小、成本低、 结构筒单、 所需***组件少以及高电磁干扰抑制等优点， 在电源管理电路中己得到广泛应用。
如图 6中所示，本实施例中的启动电压输出模块包括电荷泵电路； 通过电荷泵电路来产生栅极启动电压 V。N。 该电荷泵电路包括电荷泵、 电荷泵调变器、 分压电阻 R1以及基准电压端 D; 电荷泵的输入端与提 供原始电源的 AVDD端连接，输出端与栅极驱动集成电路连接， 电荷泵 的输出端通过分压电阻 R1与基准电压端 D连接;基准电压端 D还与调 压单元连接，基准电压端 D用于提供基准电压 VREF； 电荷泵调变器设置 在电源管理单元（未示出）之中， 其与电荷泵的输入端连接， 用于根据 基准电压 VREF以及调压单元提升的电压控制电荷泵输出的栅极启动电 压 VQN。 调压单元可以有多种实现方式： 例如， 如图 6中所示， 调压单 元包括并联在基准电压端 D的保护电阻 R2以及升压电阻 R3 , 而开关 单元设置在升压电阻 R3与基准电压端 D的通路上。电荷泵电路输出栅 极启动电压 VQN后， 通过电阻分压 R1反馈至电源管理单元， 电源管理 单元的反馈输出端（未示出）为基准电压端 D提供固定的基准电压 VREF (一般为 1. 25V ),然后再经由电源管理单元内部的电荷泵调变器通过 调变输出脉沖宽度， 进而稳定栅极启动电压 VQN的输出。 其中 ¥<«电压 可计算如下：
当开关单元接通时：
Figure imgf000008_0001
当开关单元关断时：
V0N= VREF x (1+R1 /R2)
因（R2〃R3) < R2 , 故当开关单元接通时， 输出的栅极启动电压
V0N电压会比开关单元关断时输出的栅极启动电压 VQN大。
其中， （R2〃R3)表示 R2与 R3并联时的电阻值， （R2〃R3)的阻值 等于 R2 X R3/ ( R2+R3 )0
可替换地，调压单元包括串联在基准电压端 D的保护电阻 R2， 以 及升压电阻 R3， ， 开关单元并联在升压电阻 R3， 的两端。 其中 VQN电 压可计算如下：
当开关单元接通时：
V0N=VREF X (1+R1 / (R2' +R3' ) )
当开关单元关断时：
V0N= VREF x (1+R1 /R2' )
因（R2， +R3' ) > R2' , 故当开关单元关断时， 输出的栅极启动电 压 VQN电压会比开关单元接通时输出的栅极启动电压 VQN大。 但是由于 其需长时间维持开关单元处于接通状态， 不利于节省能耗， 因此， 本 实例中，调压单元包括并联在基准电压端 D的保护电阻 R2以及升压电 阻 R3 , 而开关单元设置在升压电阻 R3与基准电压端 D的通路上。
如此， 便可以通过开关单元定时接通一个预定时间， 在预定时间 内提升第二预设电压 V。H， 至高于第一预设电压 V。H的第三预设电压
VG„' '。
为了方便控制，本实施例中的开关单元包括开关元件 T1以及与开 关元件 T1连接的时序控制器 T-C0N , 开关元件优选为薄膜晶体管， 可 以为 N型薄膜晶体管或者 P型薄膜晶体管，也可以为其他形式的开关。
本发明实施例还提供了一种栅极驱动电压供应方法， 相比于现有 技术中栅极驱动电压供应方法的主要改进点之一在于， 当第二预设电 压 VEH， 恢复至第一预设电压 VEH时， 会在预定时间内提升第二预设电 压 V。H， 至高于第一预设电压 V。H的第三预设电压 V。H，，， 在上述预定时 间过后， 第三预设电压 V。H，， 降至第一预设电压 V。H；。 下面结合上述栅 极驱动电压供应装置以及图 7对该栅极驱动电压供应方法加以详细说 明。
其中， 在第二预设电压 VeH， 恢复至第一预设电压 VeH时， 通过时 序控制器 T-C0N施加控制信号 0E3控制薄膜晶体管 T1的开关时间，从 而控制调压单元提升第二预设电压 VeH， 至第三预设电压 VeH，，，并维持 一预定时间； 因此， 可以借助电压较高的第三预设电压 VGH，， 缩短栅 极启动电压由第二预设电压 V。H， 恢复至第一预设电压 V。H所需的时间。
之后， 栅极启动电压 VQN再输入至多灰度等级栅极驱动集成电路， 多灰度等级栅极驱动集成电路还会接收两个输入， 一个为第二预设电 压 VeH，，用来设定输出要下降到的电压，另一个为由时序控制器 T-C0N 施加的控制信号 0E2 , 用于控制下降至第二预设电压 V。H， 时的时序， 如此便可产生所需的栅极输出电压 VQUT, 栅极输出电压 VQUT的相关波形 示意图如图 7中所示。
本发明实施例还提供了一种包括上述种栅极驱动电压供应装置的 显示装置。 由于采用的栅极驱动电压供应装置缩短了栅极启动电压 V。N 由第二预设电压 V。H， 恢复至第一预设电压 V。H所需的时间， 加快了反 应速度， 从而避免因负载过大而恢复过慢的问题， 增加了液晶显示面 板的充电时间， 提升了画面显示品质； 在显示高帧率画面的产品中效 果尤其显著。
以上实施方式仅用于说明本发明， 而并非对本发明的限制， 有关 技术领域的普通技术人员， 在不脱离本发明的精神和范围的情况下， 还可以做出各种变化和变型， 因此所有等同的技术方案也属于本发明 的保护范畴。

Claims

杈 利 要 求 书
1、 一种栅极驱动电压供应装置， 包括：
启动电压输出模块， 用于输出栅极启动电压至栅极驱动集成电路， 所述栅极启动电压包括第一预设电压和低于所述第一预设电压的第二 预设电压；
其中， 还包括：
启动电压提升模块： 与所述启动电压输出模块连接， 用于在所述第 二预设电压恢复至所述第一预设电压时，于预定时间内提升所述第二预 设电压至高于所述第一预设电压的第三预设电压。
2、 根据权利要求 1所述的栅极驱动电压供应装置， 其中， 所述启 动电压提升模块包括调压单元以及开关单元；
所述调压单元与所述启动电压输出模块连接，用于提升所述第二预 设电压至所述第三预设电压；
所述开关单元与所述调压单元连接，用于定时接通与关断所述调压 单元。
3、 根据权利要求 2所述的栅极驱动电压供应装置， 其中， 所述启 动电压输出模块包括电荷泵电路； 所述电荷泵电路包括电荷泵、 电荷泵 调变器以及基准电压端；
所述电荷泵的输出端与栅极驱动集成电路连接，所述电荷泵的输出 端还通过分压电阻与所述基准电压端连接；
所述基准电压端还与所述调压单元连接，所述基准电压端用于提供 基准电压；
所述电荷泵调变器与所述电荷泵的输入端连接，用于根据所述基准 电压以及调压单元提升的电压控制所述电荷泵输出栅极启动电压。
4、 根据权利要求 3所述的栅极驱动电压供应装置， 其中， 所述调 压单元包括并联在所述基准电压端的保护电阻以及升压电阻，所述开关 单元设置在所述升压电阻与基准电压端的通路上。
5、 根据权利要求 3所述的栅极驱动电压供应装置， 其中， 所述调 压单元包括串联在所述基准电压端的保护电阻以及升压电阻，所述开关 单元并联在所述升压电阻的两端。
6、 根据权利要求 2-5任意一项所述的栅极驱动电压供应装置， 其
H o 、 、 、 一 、 、 、 、 、 、
7、 根据权利要求 6所述的栅极驱动电压供应装置， 其中， 所述开 关元件为薄膜晶体管。
8、根据权利要求 1-5或 7任意一项所述的栅极驱动电压供应装置， 其中， 所述栅极驱动集成电路为多灰度等级栅极驱动集成电路。
9、 一种栅极驱动电压供应方法， 包括输出栅极启动电压至栅极驱 动集成电路的步骤，所述栅极启动电压包括第一预设电压和低于所述第 一预设电压的第二预设电压； 其中， 在所述第二预设电压恢复至所述第 一预设电压时，在预定时间内提升所述第二预设电压至高于所述第一预 设电压的第三预设电压。
1 0、 根据权利要求 9所述的栅极驱动电压供应方法， 其中， 在第二 预设电压恢复至第一预设电压时，通过时序控制器施加控制信号控制调 压单元提升第二预设电压至所述第三预设电压， 并维持所述预定时间。
1 1、 一种显示装置， 包括权利要求 1-5或 7任意一项所述的栅极驱 动电压供应装置。
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