WO2017177536A1 - 降低液晶显示模组功耗的控制方法 - Google Patents

降低液晶显示模组功耗的控制方法 Download PDF

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WO2017177536A1
WO2017177536A1 PCT/CN2016/086006 CN2016086006W WO2017177536A1 WO 2017177536 A1 WO2017177536 A1 WO 2017177536A1 CN 2016086006 W CN2016086006 W CN 2016086006W WO 2017177536 A1 WO2017177536 A1 WO 2017177536A1
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liquid crystal
image
voltage
video image
enable signal
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PCT/CN2016/086006
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English (en)
French (fr)
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左清成
梁超
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武汉华星光电技术有限公司
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Priority to US15/302,171 priority Critical patent/US20170294167A1/en
Publication of WO2017177536A1 publication Critical patent/WO2017177536A1/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
    • G09G3/3406—Control of illumination source
    • 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 invention relates to the field of liquid crystal display modules, and more particularly to a control method for reducing power consumption of a liquid crystal display module.
  • LCD liquid crystal display module
  • LCM For the power consumption of LCM, it can be divided into two major parts: loss of LCD panel and backlight loss. Compared with the two, the proportion of backlight loss is large, usually as high as 70% or more. Therefore, reducing the power consumption of LCM by reducing backlight loss has become the focus of researchers' research.
  • the pixel voltages loaded on the pixels are respectively V1, V2, ... Vn, the common voltage VCOM remains unchanged, the backlight module is in a constant current driving state, and the backlight brightness is unchanged.
  • the video image enable signal DE is in the image non-enable region T2
  • the pixel write voltage of the liquid crystal panel is maintained, and the common voltage VCOM remains unchanged.
  • the pixel voltages loaded on the pixels are still V1, V2, respectively. — Vn, the transmittance of each pixel is constant, and the backlight module is still in a constant current driving state, and the backlight brightness is unchanged.
  • the backlight LEDs tend to operate in series, and the backlight driving voltage is relatively high. A small change in driving current will cause a huge waste of the overall power consumption of the LCM. Therefore, the video image enable signal DE is in the image.
  • the non-enable zone T2 is used, the backlight is always in a high current state, which inevitably causes waste of power consumption.
  • the technical problem to be solved by the present invention is to provide a control method for reducing the power consumption of a liquid crystal display module, which can reduce the overall liquid crystal display module while keeping the brightness of the liquid crystal display module substantially unchanged and without affecting the display effect. Power consumption.
  • the present invention provides a control method for reducing power consumption of a liquid crystal display module, wherein when the video image enable signal is in an image non-enable region, the voltage applied across the liquid crystal is increased and reduced.
  • the backlight drives the current to keep the brightness of the liquid crystal display module unchanged.
  • the method of increasing the voltage applied across the liquid crystal is to maintain the pixel write voltage amplitude of the image non-enable region and the pixel write voltage of the image enable region. The amplitudes are consistent, and when the common voltage is the same as the polarity of the pixel write voltage, the common voltage of the image non-enable region is lowered to increase the voltage applied across the liquid crystal, and the common voltage and the pixel are written.
  • the common voltage of the image non-enable region is increased to increase the voltage applied across the liquid crystal
  • the invention also provides a control method for reducing the power consumption of the liquid crystal display module.
  • the video image enable signal is in the image non-enable region, the voltage applied across the liquid crystal is increased, and the backlight driving current is reduced to maintain The brightness of the LCD module does not change.
  • the method of increasing the voltage applied across the liquid crystal is to maintain the amplitude of the pixel write voltage of the image non-enable region coincides with the amplitude of the pixel write voltage of the image enable region, and change the image non-enable region.
  • the common voltage to increase the voltage across the liquid crystal in the non-enable area of the image.
  • the common voltage and the pixel write voltage have the same polarity, the common voltage of the image non-enable region is lowered to increase the voltage applied across the liquid crystal.
  • the common voltage of the image non-enable region is increased to increase the voltage applied across the liquid crystal.
  • the pixel write voltage is a pulse signal.
  • the voltage applied across the liquid crystal returns to a voltage original value
  • the backlight drive current returns to a drive current original value
  • the video image enable signal when the video image enable signal is at a high level, the video image enable signal is in an image enable region, and when the video image enable signal is at a low level, the video image enable signal is in an image disable region.
  • the video image enable signal when the video image enable signal is at a high level, the video image enable signal is in an image non-enable region, and when the video image enable signal is at a low level, the video image enable signal is in an image enable region.
  • the invention has the advantages that when the video image enable signal is in the image non-enable region, the voltage applied to the two ends of the liquid crystal is increased, the transmittance of the liquid crystal pixel during operation is improved, the display brightness of the liquid crystal panel is improved, and the backlight driving current is reduced.
  • the backlight brightness is reduced to ensure that the overall display effect is unchanged when the video image enable signal is in the image non-enable region.
  • 1 is a driving timing chart of a conventional liquid crystal display module
  • FIG. 2 is a driving sequence diagram of a control method for reducing power consumption of a liquid crystal display module of the present invention.
  • the control method for reducing the power consumption of the liquid crystal display module of the present invention is: the video image enable signal DE is in the image non-enable region T2, increasing the voltage applied across the liquid crystal, and reducing the backlight driving current to maintain the liquid crystal display mode The brightness of the group is unchanged.
  • the video image enable signal DE includes an image enable area T1 and an image non-enable area T2, wherein when the video image enable signal DE is at a high level, the video image enable signal DE is in the image enable area T1.
  • the video image enable signal DE is at a low level, the video image enable signal DE is in the image non-enable region T2.
  • the video image enable signal DE is at a high level, the video image enable signal DE is in the image non-enable region T2, when the video image is enabled.
  • the signal DE is at a low level, the video image enable signal DE is in the image enable area T1, and the invention is not limited thereto.
  • the waveform of the pixel write voltage signal is a pulse signal
  • the voltage between the pixel electrode and the common electrode is a voltage applied across the liquid crystal, that is, a pixel voltage.
  • the method for increasing the voltage applied across the liquid crystal in the embodiment of the present invention is: maintaining the pixel write voltage signal of the image non-enable region T2 and the pixel write voltage signal amplitude of the image enable region T1 to be the same, and changing
  • the magnitude of the common voltage Vcom increases the pixel voltage applied across the liquid crystal in the image non-enable region T2, as described in detail below.
  • the common voltage Vcom can be DC Vcom or AC Vcom.
  • the common voltage Vcom at this time is defined as the common voltage original value, and the voltage applied across the liquid crystal is
  • the pixel voltage is V1, V2, ... Vn, defining the pixel voltage at this time as the original value of the pixel voltage.
  • the backlight is in a constant current output state, as shown in FIG. 2, the backlight driving current does not change, and the backlight is defined at this time.
  • the drive current is the original value of the drive current. In this state, the pixel + light transmittance is a certain value, and the backlight brightness is a certain value, and the display brightness of the liquid crystal display module is substantially a certain value.
  • the voltage applied across the liquid crystal increases, the light transmittance of each pixel increases.
  • the common voltage is opposite to the polarity of the pixel write voltage signal, for example, the common voltage is -0.23V
  • the voltage applied across the liquid crystal that is, the pixel voltage is V1, V2, ... Vn
  • the common voltage Vcom is -0.23V
  • the voltages applied across the liquid crystal are V1, V2, ... Vn
  • the voltage applied across the liquid crystal becomes larger, respectively, V4, V5,... Vm
  • V4 V1 + 0.1V
  • V5 V2 + 0.1V
  • ... Vm Vn + 0.1V
  • the voltage applied across the liquid crystal increases, and the light transmittance of each pixel increases.
  • a flipping manner such as row flipping, column flipping, or dot flipping may be used to increase the voltage applied across the liquid crystal, and the flipping manner such as row flipping, column flipping, or dot flipping is a technique in the art. The methods well known to the person are not repeated here.
  • the light transmittance of each pixel is simply increased, the brightness of the liquid crystal display module will increase, resulting in unstable display of the liquid crystal display module. Therefore, in the present invention, the light transmittance of each pixel is increased, the backlight driving current is reduced, and the brightness of the backlight is reduced, and the two are coordinated with each other, so that the overall brightness of the liquid crystal display module is substantially unchanged, as described in detail below. .
  • the backlight drive current is I
  • the backlight drive current ⁇ x is decreased
  • the backlight drive current is I- ⁇ x.
  • the backlight drive current is 20 mA
  • the backlight drive current is less than 20 mA.
  • the backlight driving current is reduced, so that the brightness of the overall liquid crystal display module can be substantially unchanged.
  • the power consumption of the backlight reduction is much larger than the power consumption increased by the change of the common voltage Vcom. Therefore, the overall power consumption of the liquid crystal display module is reduced without substantially affecting the display effect.
  • the video image enable signal enters the image enable area T1 from the image non-enable region T2
  • the voltage loaded across the liquid crystal is restored to the original value of the pixel voltage, that is, the common voltage Vcom is restored to the common voltage original value, and the backlight is restored.
  • the driving current is driven to the original value of the driving current to keep the display performance of the liquid crystal pixel module unchanged.
  • the video image enable signal When the video image enable signal is in the image non-enable region, all the pixels are in a non-charged hold state, and by changing the common voltage at this time, the voltage difference applied to both ends of the liquid crystal becomes larger, and the display brightness of the liquid crystal panel is improved; When the overall brightness of the liquid crystal display module is kept constant, the backlight current can be appropriately reduced, so that the overall power saving effect of the liquid crystal display module can be achieved.

Abstract

一种降低液晶显示模组功耗的控制方法，所述方法是在视频图像使能信号（DE）处于图像非使能区（T2）时，增大加载在液晶两端的电压（V1、V2、……Vn）以提高液晶象素工作时光的透过率，并减小背光驱动电流以降低背光亮度，保证在视频图像使能信号（DE）处于图像非使能区（T2）时液晶显示模组亮度不变。

Description

降低液晶显示模组功耗的控制方法 技术领域
本发明涉及液晶显示模组领域，尤其涉及一种降低液晶显示模组功耗的控制方法。
 背景技术
随着人们生活对移动设备使用的依赖性逐渐加深，信息存取和处理同时也正朝着提高像素密度、基于图形输出的方向发展；形状各异、穿戴产品或便携装置诸如PAD、笔形扫描仪、WAP电话、电子邮件浏览器以及其他通信设备正在持续增长。摆在设计师面前的任务是如何进一步减小尺寸、减轻重量和降低功耗。而对于液晶显示模组（LCM）而言，其功耗则是制约设备使用时间的主要因素。
对于LCM的功耗而言，可以分为液晶面板的损耗与背光损耗两大主要部分。两者相较，又以背光损耗所占比重较大，通常高达70%左右或更多。因此，通过降低背光损耗而降低LCM的功耗成为研究者研究的重点。
参见图1所示，现有的屏幕显示控制系统中，在视频图像使能信号DE处于图像使能区T1时，加载在像素上的像素电压分别为V1、V2、…… Vn，公用电压VCOM保持不变，背光模组处于某一电流恒定驱动状态，背光亮度不变。在视频图像使能信号DE处于图像非使能区T2时，液晶面板象素写入电压处于维持状态，公用电压VCOM保持不变，此时加载在像素上的像素电压依然分别为V1、V2、…… Vn，各像素穿透率不变，且背光模组依然处于某一电流恒定驱动状态，背光亮度不变。对中小尺寸LCM而言，背光LED往往以串联的方式运行，背光驱动电压相对较高，很小的驱动电流变化即会造成LCM整体功耗巨大浪费，因此，在视频图像使能信号DE处于图像非使能区T2时，背光一直处于较高的电流状态，必然会造成功耗的浪费。
 技术问题
本发明所要解决的技术问题是，提供一种降低液晶显示模组功耗的控制方法，其能够在保持液晶显示模组亮度基本不变，不影响显示效果的前提下，降低液晶显示模组整体的功耗。
 技术解决方案
为了解决上述问题，本发明提供了一种降低液晶显示模组功耗的控制方法，其中，在视频图像使能信号处于图像非使能区时，增大加载在液晶两端的电压，并减小背光驱动电流，以保持液晶显示模组亮度不变，增大加载在液晶两端的电压的方法是：保持图像非使能区的像素写入电压的幅值与图像使能区的像素写入电压的幅值一致，在所述公用电压与像素写入电压极性相同时，降低图像非使能区的所述公用电压，以增大加载在液晶两端的电压，在所述公用电压与像素写入电压信极性相反时，增大图像非使能区的所述公用电压，以增大加载在液晶两端的电压
本发明还提供了一种降低液晶显示模组功耗的控制方法，在视频图像使能信号处于图像非使能区时，增大加载在液晶两端的电压，并减小背光驱动电流，以保持液晶显示模组亮度不变。
进一步，增大加载在液晶两端的电压的方法是：保持图像非使能区的像素写入电压的幅值与图像使能区的像素写入电压的幅值一致，并改变图像非使能区的公用电压，以在图像非使能区增大加载在液晶两端的电压。
进一步，在所述公用电压与像素写入电压极性相同时，降低图像非使能区的所述公用电压，以增大加载在液晶两端的电压。
进一步，在所述公用电压与像素写入电压信极性相反时，增大图像非使能区的所述公用电压，以增大加载在液晶两端的电压。
进一步，所述像素写入电压为脉冲信号。
进一步，在视频图像使能信号从图像非使能区进入图像使能区时，加载在液晶两端的电压恢复至一电压原值，背光驱动电流恢复至一驱动电流原值。
进一步，当视频图像使能信号处于高电平时，视频图像使能信号处于图像使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像非使能区。
进一步，当视频图像使能信号处于高电平时，视频图像使能信号处于图像非使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像使能区。
 有益效果
本发明的优点在于，在视频图像使能信号处于图像非使能区时，增加加载到液晶两端的电压，提高液晶象素工作时光的透过率，提高液晶面板的显示亮度，降低背光驱动电流，减小背光亮度，保证在视频图像使能信号处于图像非使能区时整体的显示效果不变。
 附图说明
图1是现有的液晶显示模组的驱动时序图；
图2是本发明降低液晶显示模组功耗的控制方法的驱动时序图。
 本发明的最佳实施方式
下面结合附图对本发明提供的降低液晶显示模组功耗的控制方法的具体实施方式做详细说明。
本发明降低液晶显示模组功耗的控制方法是：在视频图像使能信号DE处于图像非使能区T2，增大加载在液晶两端的电压，并减小背光驱动电流，以保持液晶显示模组亮度不变。
参见图2，视频图像使能信号DE包括图像使能区Tl和图像非使能区T2，其中，当视频图像使能信号DE处于高电平时，视频图像使能信号DE处于图像使能区Tl，当视频图像使能信号DE处于低电平时，视频图像使能信号DE处于图像非使能区T2。当然，本领域的技术人员可以理解，在其它实施例中，也可以是当视频图像使能信号DE处于高电平时，视频图像使能信号DE处于图像非使能区T2，当视频图像使能信号DE处于低电平时，视频图像使能信号DE处于图像使能区T1，本发明不以此为限。
像素写入电压信号波形为脉冲信号，像素电极与公用电极之间的电压为加载在液晶两端的电压，即像素电压。本发明本具体实施方式中增大加载在液晶两端的电压的方法是：保持图像非使能区T2的像素写入电压信号与图像使能区T1的像素写入电压信号幅值一致，并改变公用电压Vcom的大小，以在图像非使能区T2增大加载在液晶两端的像素电压，详细叙述如下。所述公用电压Vcom可以为DC Vcom或AC Vcom。
在视频图像使能信号DE处于图像使能区T1时，输入像素写入电压，公用电压Vcom保持不变，则定义此时的公用电压Vcom为公用电压原值，加载在液晶两端的电压，即像素电压分别为V1、V2、…… Vn，定义此时的像素电压为像素电压原值，此时，背光处于某一电流恒定输出状态，如图2所示的背光驱动电流，所述背光驱动电流不变，则定义此时的背光驱动电流为驱动电流原值。在此状态下，各象素+光穿透率为一定值，背光亮度为一定值，则液晶显示模组显示亮度基本为一定值。
在视频图像使能信号DE处于图像非使能区T2时，调整公用电压Vcom，使公用电压Vcom变化为△y，则原本加载在液晶两端的电压，即像素电压V1、V2、…… Vn变大，分别变成V4、V5……Vm，即各电压间存在关系V4=V1+△y，V5=V2+△y，……Vm=Vn+△y。此时，由于加载在液晶两端的电压增大，则各象素光穿透率都会增加。
例如，在所述公用电压与像素写入电压信号极性相同时，例如所述公用电压原值为1V，加载在液晶两端的电压，即像素电压分别为V1、V2、…… Vn，即在视频图像使能信号DE处于图像使能区T1时，公用电压Vcom为1V，加载在液晶两端的电压分别为V1、V2、…… Vn，则在视频图像使能信号DE处于图像非使能区T2时，降低所述公用电压Vcom值，使其变为0.8V，则，加载在液晶两端的电压变大，分别为V4、V5、…… Vm，其中，V4=V1+0.2V，V5=V2+0.2V，……Vm=Vn+0.2V，加载在液晶两端的电压增大，则各象素光穿透率增加。
若在所述公用电压与像素写入电压信号极性相反时，例如所述公用电压原值为-0.23V，加载在液晶两端的电压，即像素电压分别为V1、V2、…… Vn，即在视频图像使能信号DE处于图像使能区T1时，公用电压Vcom为-0.23V，加载在液晶两端的电压分别为V1、V2、…… Vn，则在视频图像使能信号DE处于图像非使能区T2时，增加所述公用电压Vcom值，使其变为-0.33V，则，加载在液晶两端的电压变大，分别为V4、V5、…… Vm，其中，V4=V1+0.1V，V5=V2+0.1V，……Vm=Vn+0.1V，加载在液晶两端的电压增大，则各象素光穿透率增加。
在本发明其他具体实施方式中，还可以采用行翻转、列翻转或点翻转等翻转方式来增大加载在液晶两端的电压，所述行翻转、列翻转或点翻转等翻转方式为本领域技术人员熟知的方法，本文不再赘述。
若单纯增加各象素光穿透率，则液晶显示模组的亮度会提高，导致液晶显示模组显示不稳定。因此，本发明在各象素光穿透率增加的同时，减小背光驱动电流，进而减小背光的亮度，两者相互协调，能够使液晶显示模组的整体亮度基本不变，详细叙述如下。
在视频图像使能信号DE处于图像使能区T1时，背光驱动电流为I，则在视频图像使能信号DE处于图像非使能区T2时，减小所述背光驱动电流△x，则在视频图像使能信号DE处于图像非使能区T2时，所述背光驱动电流为I-△x。例如，在视频图像使能信号DE处于图像使能区T1时，背光驱动电流为20mA，则在视频图像使能信号DE处于图像非使能区T2时，背光驱动电流小于20mA。
本发明在视频图像使能信号DE处于图像非使能区T2时，减小背光驱动电流，从而可以使整体的液晶显示模组亮度基本不变。通常，背光降低的功耗会远远大于因公用电压Vcom变化增加的功耗，因此，在基本不影响显示效果的情况下，降低了液晶显示模组整体的功耗。
进一步，在视频图像使能信号从图像非使能区T2进入图像使能区T1时，恢复加载在液晶两端的电压至像素电压原值，即恢复公用电压Vcom至公用电压原值，并恢复背光驱动电流至驱动电流原值，以保持液晶像素模组显示性能不变。
在视频图像使能信号处于图像非使能区时，所有像素处于非充电的保持状态，通过改变此时的公用电压，使加载到液晶两端的电压差变大，提高液晶面板显示亮度；同时在保持液晶显示模组整体亮度不变的情况下，可以适当降低背光电流，从而可以达到液晶显示模组整体省电的效果。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (13)

  1. 一种降低液晶显示模组功耗的控制方法，其中，在视频图像使能信号处于图像非使能区时，增大加载在液晶两端的电压，并减小背光驱动电流，以保持液晶显示模组亮度不变，增大加载在液晶两端的电压的方法是：保持图像非使能区的像素写入电压的幅值与图像使能区的像素写入电压的幅值一致，在所述公用电压与像素写入电压极性相同时，降低图像非使能区的所述公用电压，以增大加载在液晶两端的电压，在所述公用电压与像素写入电压信极性相反时，增大图像非使能区的所述公用电压，以增大加载在液晶两端的电压。
  2. 根据权利要求1所述的降低液晶显示模组功耗的控制方法，其中，所述像素写入电压为脉冲信号。
  3. 根据权利要求1所述的降低液晶显示模组功耗的控制方法，其中，在视频图像使能信号从图像非使能区进入图像使能区时，加载在液晶两端的电压恢复至一电压原值，背光驱动电流恢复至一驱动电流原值。
  4. 根据权利要求1所述的降低液晶显示模组功耗的控制方法，其中，当视频图像使能信号处于高电平时，视频图像使能信号处于图像使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像非使能区。
  5. 根据权利要求1所述的降低液晶显示模组功耗的控制方法，其中，当视频图像使能信号处于高电平时，视频图像使能信号处于图像非使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像使能区。
  6. 一种降低液晶显示模组功耗的控制方法，其中，在视频图像使能信号处于图像非使能区时，增大加载在液晶两端的电压，并减小背光驱动电流，以保持液晶显示模组亮度不变。
  7. 根据权利要求6所述的降低液晶显示模组功耗的控制方法，其中，增大加载在液晶两端的电压的方法是：保持图像非使能区的像素写入电压的幅值与图像使能区的像素写入电压的幅值一致，并改变图像非使能区的公用电压，以在图像非使能区增大加载在液晶两端的电压。
  8. 根据权利要求7所述的降低液晶显示模组功耗的控制方法，其中，在所述公用电压与像素写入电压极性相同时，降低图像非使能区的所述公用电压，以增大加载在液晶两端的电压。
  9. 根据权利要求7所述的降低液晶显示模组功耗的控制方法，其中，在所述公用电压与像素写入电压信极性相反时，增大图像非使能区的所述公用电压，以增大加载在液晶两端的电压。
  10. 根据权利要求7所述的降低液晶显示模组功耗的控制方法，其中，所述像素写入电压为脉冲信号。
  11. 根据权利要求6所述的降低液晶显示模组功耗的控制方法，其中，在视频图像使能信号从图像非使能区进入图像使能区时，加载在液晶两端的电压恢复至一电压原值，背光驱动电流恢复至一驱动电流原值。
  12. 根据权利要求6所述的降低液晶显示模组功耗的控制方法，其中，当视频图像使能信号处于高电平时，视频图像使能信号处于图像使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像非使能区。
  13. 根据权利要求6所述的降低液晶显示模组功耗的控制方法，其中，当视频图像使能信号处于高电平时，视频图像使能信号处于图像非使能区，当视频图像使能信号处于低电平时，视频图像使能信号处于图像使能区。
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