WO2016107247A1 - 液晶显示控制方法及液晶显示器 - Google Patents

液晶显示控制方法及液晶显示器 Download PDF

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Publication number
WO2016107247A1
WO2016107247A1 PCT/CN2015/092270 CN2015092270W WO2016107247A1 WO 2016107247 A1 WO2016107247 A1 WO 2016107247A1 CN 2015092270 W CN2015092270 W CN 2015092270W WO 2016107247 A1 WO2016107247 A1 WO 2016107247A1
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liquid crystal
crystal display
backlight
display panel
time
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PCT/CN2015/092270
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English (en)
French (fr)
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许怀书
陈细俊
欧泽延
劳宣招
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深圳Tcl新技术有限公司
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Publication of WO2016107247A1 publication Critical patent/WO2016107247A1/zh

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

Definitions

  • the present invention relates to the field of liquid crystal television technologies, and in particular, to a liquid crystal display control method and a liquid crystal display.
  • the movement quality processing function will increase Local. Dimming (local light and dark control), natural light, motion compensation and other technologies.
  • the application of these technologies causes the Duty value of the backlight to change.
  • the backlight has a bright and dark flicker state, which may affect the image quality effect.
  • the main object of the present invention is to provide a liquid crystal display control method and a liquid crystal display, which aim to improve the image quality of a liquid crystal television.
  • the present invention provides a liquid crystal display control method, including:
  • the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started.
  • phase of the image signal of the liquid crystal display panel and the dimming signal of the backlight board are asynchronous
  • the relationship between the scanning dimming signal scanning frequency A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than zero.
  • the dimming signal scanning start time is later than the image signal scanning start time.
  • the initial turn-on timing of the backlight of the backlight panel is within 1/5*Tr time after the liquid crystal display panel starts rotating, wherein Tr is the liquid crystal molecule of the liquid crystal display panel switches between the two screens. The time of rotation.
  • the dimming signal scanning start time is misaligned with the image signal scanning start time, and the backlight initial opening time of the backlight panel is within 1/5*Tr time before the liquid crystal end rotation timing of the liquid crystal display panel
  • Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are rotated between the two screens.
  • the embodiment of the invention further provides a liquid crystal display for controlling liquid crystal display, comprising:
  • a startup module configured to start image signal scanning of the liquid crystal display panel and dimming signal scanning of the backlight panel after the liquid crystal display is powered on, the image signal of the liquid crystal display panel and the dimming signal of the backlight panel are asynchronous; the backlight
  • the relationship between the dimming signal scanning frequency A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than zero.
  • the dimming signal scanning start time is later than the image signal scanning start time.
  • the initial turn-on timing of the backlight of the backlight panel is within 1/5*Tr time after the liquid crystal display panel starts rotating, wherein Tr is the liquid crystal molecule of the liquid crystal display panel switches between the two screens. The time of rotation.
  • the dimming signal scanning start time is misaligned with the image signal scanning start time, and the backlight initial opening time of the backlight panel is within 1/5*Tr time before the liquid crystal end rotation timing of the liquid crystal display panel
  • Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are rotated between the two screens.
  • a liquid crystal display control method and a liquid crystal display according to embodiments of the present invention after the liquid crystal display is powered on, start image signal scanning of the liquid crystal display panel and dimming signal scanning of the backlight panel, image signals and backlight boards of the liquid crystal display panel
  • the phase of the dimming signal is asynchronous; the relationship between the scanning frequency A of the backlight dimming signal and the scanning frequency B of the image signal of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than 0,
  • N is an integer greater than
  • 1 is a conventional backlight and liquid crystal display panel scanning frequency design, equipped with a movement quality processing function, corresponding single pixel point timing diagram;
  • figure 2 Designed for the scanning frequency of the traditional backlight and liquid crystal display panel, equipped with the movement quality processing function of the movement, using the MPRT instrument to test the moving picture switching process, the average RGB brightness variation curve of the S points of a single pixel point;
  • FIG. 3 is a timing asynchronous scan design of a backlight and a liquid crystal display panel according to an embodiment of the present invention, and a timing diagram of a corresponding single pixel point is provided with a core image quality processing function;
  • FIG. 4 is a phase asynchronous scan design of a backlight and a liquid crystal display panel according to an embodiment of the present invention, which is equipped with a core image quality processing function, and another timing chart corresponding to a single pixel point;
  • FIG. 5 is an asynchronous scan design of a backlight and a liquid crystal display panel according to an embodiment of the present invention, which is equipped with a core image quality processing function, and uses an MPRT instrument to test a moving picture switching process, and an RGB luminance change curve of a single pixel point S period integration average.
  • the solution of the embodiment of the invention is mainly: after the liquid crystal display is powered on, the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started, and the phase of the image signal of the liquid crystal display panel and the dimming signal of the backlight panel is asynchronous;
  • the backlight dimming signal frequency (backlight driver board PWM frequency) A is different from the scanning frequency B of the liquid crystal display panel.
  • a preferred embodiment of the present invention provides a liquid crystal display control method, including:
  • the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started, and the image signal of the liquid crystal display panel and the dimming signal of the backlight board are asynchronous;
  • the backlight dimming signal scanning frequency is The relationship between A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than zero.
  • the backlight Duty ⁇ 100% when the backlight Duty ⁇ 100%, the backlight has a bright and dark flicker state, and at the same time, the backlight and the liquid crystal display panel adopt synchronous scanning, resulting in abnormal image quality.
  • the dimming signal of the backlight board and the liquid crystal display panel are asynchronously scanned, even if the image signal of the liquid crystal display panel and the dimming signal of the backlight board are asynchronous, and the scanning frequency of the backlight dimming signal and the image of the liquid crystal display panel are adjusted.
  • the signal scanning frequency B is different, and the movement quality processing function of the movement can avoid the flicker phenomenon of the backlight relative to the screen scanning, thereby realizing the optimization of the liquid crystal display image quality.
  • the movement of the liquid crystal display inputs an image signal scanning control signal to the screen driving of the liquid crystal display panel, and the screen driving of the liquid crystal display panel scans the control signal according to the received image signal to start image signal scanning.
  • the liquid crystal molecules in the liquid crystal display panel start to rotate; in addition, the screen driving of the liquid crystal display panel feeds back corresponding control signals to the backlight driving, and after the backlight driving receives the control signal fed back by the liquid crystal display panel, the dimming signal is scanned and the backlight is turned on.
  • the backlight of the board is controlled at the moment of turning on, and the light and dark switches are periodically controlled to perform dimming.
  • the start time of the backlight dimming signal scanning has a certain delay compared to the start time T1 of the image signal scanning of the liquid crystal display panel, and the scanning frequency of the backlight dimming signal and the image signal scanning of the liquid crystal display panel are adjusted.
  • the frequency is different, and the dimming signal of the backlight board is realized asynchronously with the scanning phase of the screen.
  • the image signal scanning of the liquid crystal display panel is started, and the startup time is T1, and the start scanning time of the dimming signal of the backlight panel and the image of the liquid crystal display panel are controlled.
  • the start scan time T1 of the signal is not equal, the scan start time of the dimming signal is later than the scan start time of the image signal; further, the backlight is activated during the ⁇ T time after T1, which is after the start of the rotation of the liquid crystal molecules of the liquid crystal display panel 1/5*Tr, that is, controlling the backlight opening timing of the backlight panel within 1/5*Tr time after the liquid crystal starts to rotate, wherein Tr is the liquid crystal molecule of the liquid crystal display panel switching between the two screens. time.
  • the image signal scanning of the liquid crystal display panel is started, and the startup time is T1; the scan signal scanning start time is misaligned with the image signal scanning start time.
  • the backlight is activated in the Tr- ⁇ T time after T1, which is 1/5*Tr before the end of the rotation of the liquid crystal molecules of the liquid crystal display panel, that is, the backlight opening time of the control backlight panel is before the liquid crystal end rotation time. /5*Tr time, where Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are switched between the two screens, and Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are switched between the two screens.
  • the PWM frequency A of the backlight driving board is adjusted to be asynchronous with the scanning frequency B of the liquid crystal display panel, and at the same time, in order to avoid the flicker phenomenon of the backlight relative to the screen scanning,
  • the above timing design can greatly improve the liquid crystal display quality effect.
  • the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started, and the image signal of the liquid crystal display panel and the dimming signal of the backlight panel are asynchronous; the backlight is dimmed.
  • the relationship between the signal scanning frequency A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than 0, thereby avoiding the flicker phenomenon of the backlight relative to the screen scanning.
  • the improvement effect of the image quality of the embodiment of the present invention is tested, and the simulation result of the MPRT instrument can be introduced as the image quality judgment standard.
  • the MPRT instrument is a test instrument that simulates the human eye to observe the motion picture quality effect and quantizes it graphically.
  • FIG. 1 is a conventional backlight (BLU) and a liquid crystal display panel (Open Cell) scan frequency design, equipped with movement quality processing function, corresponding single-pixel point timing diagram.
  • BLU backlight
  • Open Cell liquid crystal display panel
  • Figure 2 shows the scanning frequency design of the traditional backlight and liquid crystal display panel. It is equipped with the image quality processing function of the movement.
  • the MPRT instrument is used to test the moving picture switching process.
  • the RGB brightness variation curve of a single pixel point S (S ⁇ 20) is integrated. .
  • the single pixel is in the same phase in the S period, and the backlight switch and the liquid crystal display panel are always in the same phase.
  • the inflection point of the RGB curve can be clearly observed from the curve, that is, the backlight Light and dark flashes will be captured, and the quality of the human eye will be worse.
  • FIG. 3 and FIG. 4 respectively illustrate a phase asynchronous scan design of a dimming signal of a backlight panel and an image signal of a liquid crystal display panel according to an embodiment of the present invention, that is, adjusting a backlight startup time and a backlight driving PWM frequency.
  • the movement image processing function is equipped, and two timing charts corresponding to single pixel points are provided.
  • Tr is the time during which the liquid crystal is switched between the two screens.
  • the scanning and backlight start time control of the liquid crystal display panel needs to meet the timing that the backlight opening time satisfies the liquid crystal maintaining stable state, that is, the backlight opening time is delayed to the liquid crystal display panel.
  • FIG. 5 is an asynchronous scan design of a backlight and a liquid crystal display panel according to an embodiment of the present invention, and is equipped with a core image quality processing function, and uses a MPRT instrument to test a moving picture switching process, and a single pixel point S (S ⁇ 20) The RGB luminance change curve of the period integral average.
  • the scanning phase of the backlight switch and the liquid crystal display panel is always changed in a single pixel point in S cycles, and can be observed from the curve after integration.
  • There is no inflection point in the RGB curve that is, the backlight bright and dark flicker phenomenon is optimized by this technology, and the image quality effect reflected to the human eye is improved to the optimum state.
  • liquid crystal display of the present invention for controlling liquid crystal display is proposed.
  • a preferred embodiment of the present invention provides a liquid crystal display for controlling a liquid crystal display, comprising: a booting module in which:
  • the startup module 201 is configured to start image signal scanning of the liquid crystal display panel and scan of the dimming signal of the backlight panel after the liquid crystal display is powered on, and the image signal of the liquid crystal display panel and the dimming signal of the backlight panel are asynchronous; the backlight dimming signal
  • the relationship between the scanning frequency A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than zero.
  • the startup module 201 is further configured to control a backlight opening time of the backlight board, specifically, after the liquid crystal display is powered on, control a start scan time of the dimming signal of the backlight board and an image signal of the liquid crystal display panel.
  • the scanning time is not equal; and the backlight opening time of the control backlight is controlled within 1/5*Tr time after the liquid crystal starts to rotate, wherein Tr is the time when the liquid crystal molecules of the liquid crystal display panel switch between the two screens.
  • Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are switched between the two screens.
  • the movement of the liquid crystal display inputs an image signal scanning control signal to the screen driving of the liquid crystal display panel, and the screen driving of the liquid crystal display panel scans the control signal according to the received image signal to start image signal scanning.
  • the liquid crystal molecules in the liquid crystal display panel start to rotate; in addition, the screen driving of the liquid crystal display panel feeds back corresponding control signals to the backlight driving, and after the backlight driving receives the control signal fed back by the liquid crystal display panel, the dimming signal is scanned and the backlight is turned on.
  • the backlight of the board is controlled at the moment of turning on, and the light and dark switches are periodically controlled to perform dimming.
  • the start time of the backlight dimming signal scanning has a certain delay compared to the start time T1 of the image signal scanning of the liquid crystal display panel, and the dimming signal scanning start time is later than the image signal scanning start.
  • the time or the scanning start time of the dimming signal is misaligned with the scanning start time of the image signal, and the scanning frequency of the backlight dimming signal is adjusted to be different from the scanning frequency of the image signal of the liquid crystal display panel, so that the dimming signal and the screen of the backlight are scanned.
  • Phase is asynchronous.
  • the image signal scanning of the liquid crystal display panel is started, and the startup time is T1, and the start scanning time of the dimming signal of the backlight panel and the image of the liquid crystal display panel are controlled.
  • the start scan time T1 of the signal is not equal, the scan start time of the dimming signal is later than the scan start time of the image signal; further, the backlight is activated during the ⁇ T time after T1, which is after the start of the rotation of the liquid crystal molecules of the liquid crystal display panel 1/5*Tr, that is, controlling the backlight opening timing of the backlight panel within 1/5*Tr time after the liquid crystal starts to rotate, wherein Tr is the liquid crystal molecule of the liquid crystal display panel switching between the two screens. time.
  • the image signal scanning of the liquid crystal display panel is started, and the startup time is T1; the scan signal scanning start time is misaligned with the image signal scanning start time.
  • the backlight is activated in the Tr- ⁇ T time after T1, which is 1/5*Tr before the end of the rotation of the liquid crystal molecules of the liquid crystal display panel, that is, the backlight opening time of the control backlight panel is before the liquid crystal end rotation time. /5*Tr time, where Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are switched between the two screens, and Tr is the time during which the liquid crystal molecules of the liquid crystal display panel are switched between the two screens.
  • the PWM frequency A of the backlight driving board is adjusted to be asynchronous with the scanning frequency B of the liquid crystal display panel, and at the same time, in order to avoid the flicker phenomenon of the backlight relative to the screen scanning,
  • the above timing design can greatly improve the liquid crystal display quality effect.
  • the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started, and the image signal of the liquid crystal display panel and the dimming signal of the backlight panel are asynchronous; the backlight is dimmed.
  • the relationship between the signal scanning frequency A and the image signal scanning frequency B of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than 0, thereby avoiding the flicker phenomenon of the backlight relative to the screen scanning.
  • the improvement effect of the image quality of the embodiment of the present invention is tested, and the simulation result of the MPRT instrument can be introduced as the image quality judgment standard.
  • the MPRT instrument is a test instrument that simulates the human eye to observe the motion picture quality effect and quantizes it graphically.
  • FIG. 1 is a conventional backlight (BLU) and a liquid crystal display panel (Open Cell) scan frequency design, equipped with movement quality processing function, corresponding single-pixel point timing diagram.
  • BLU backlight
  • Open Cell liquid crystal display panel
  • figure 2 Designed for the traditional backlight and liquid crystal display panel scanning frequency, equipped with movement quality processing function, using MPRT instrument to test the moving picture switching process, single pixel point S (S ⁇ 20) cycles integrated average RGB brightness curve.
  • the single pixel is in the same phase in the S period, and the backlight switch and the liquid crystal display panel are always in the same phase.
  • the inflection point of the RGB curve can be clearly observed from the curve, that is, the backlight Light and dark flashes will be captured, and the quality of the human eye will be worse.
  • FIG. 3 and FIG. 4 respectively illustrate a phase asynchronous scan design of a dimming signal of a backlight panel and an image signal of a liquid crystal display panel according to an embodiment of the present invention, that is, adjusting a backlight startup time and a backlight driving PWM frequency.
  • the movement image processing function is equipped, and two timing charts corresponding to single pixel points are provided.
  • Tr is the time during which the liquid crystal is switched between the two screens.
  • the scanning and backlight start time control of the liquid crystal display panel needs to meet the timing that the backlight opening time satisfies the liquid crystal maintaining stable state, that is, the backlight opening time is delayed to the liquid crystal display panel.
  • FIG. 5 is an asynchronous scan design of a backlight and a liquid crystal display panel according to an embodiment of the present invention, and is equipped with a core image quality processing function, and uses a MPRT instrument to test a moving picture switching process, and a single pixel point S (S ⁇ 20) The RGB luminance change curve of the period integral average.
  • the scanning phase of the backlight switch and the liquid crystal display panel is always changed in a single pixel point in S cycles, and can be observed from the curve after integration.
  • There is no inflection point in the RGB curve that is, the backlight bright and dark flicker phenomenon is optimized by this technology, and the image quality effect reflected to the human eye is improved to the optimum state.
  • the image signal scanning of the liquid crystal display panel and the dimming signal scanning of the backlight panel are started, so that the image signal of the liquid crystal display panel and the dimming signal of the backlight panel are
  • the phase is asynchronous; adjusting the scanning frequency A of the backlight dimming signal and the scanning frequency B of the image signal of the liquid crystal display panel, so that the relationship between the scanning frequency A of the backlight dimming signal and the scanning frequency B of the image signal of the liquid crystal display panel satisfies: A>B, and A ⁇ N*B, where N is an integer greater than 0, thereby avoiding the flicker phenomenon of the backlight relative to the screen scanning, improving the display quality effect of the liquid crystal display such as the liquid crystal television, making the product cost-effective and enhancing the market competitiveness of the product. .

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Abstract

一种液晶显示控制方法及液晶显示器，其方法包括：在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，液晶显示面板的图像信号和背光板的调光信号的相位异步；背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A＞B，且A≠N*B，其中，N为大于0的整数。避免了背光相对屏扫描出现闪烁现象，提升了液晶电视等液晶显示器的显示画质效果，使产品具有高性价比，提升产品市场竞争力。

Description

液晶显示控制方法及液晶显示器
技术领域
本发明涉及液晶电视技术领域，尤其涉及一种液晶显示控制方法及液晶显示器。
背景技术
目前的液晶显示装置中，背光与液晶显示面板（Open Cell）采用同步扫描技术。在背光Duty=100%状态下，此技术应用可满足对液晶显示画质要求；当背光Duty<100%时，背光存在亮暗闪烁状态，此时再搭配液晶显示面板的同步扫描，画质上会出现异常。
而随着液晶电视技术的发展，为追求高画质要求，机芯画质处理功能中会增加Local Dimming（局部亮暗控制）、自然光、运动补偿等技术。这些技术的应用，使得背光的Duty值发生变化，在用户使用过程中，背光存在亮暗闪烁状态，会影响到画质效果。
发明内容
本发明的主要目的在于提供一种液晶显示控制方法及液晶显示器，旨在提升液晶电视显示画质效果。
为了达到上述目的，本发明提出一种液晶显示控制方法，包括：
在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，
所述液晶显示面板的图像信号和背光板的调光信号的相位异步；
所述背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
优选地，所述调光信号扫描启动时间晚于所述图像信号扫描启动时间。
优选地，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
优选地，所述调光信号扫描启动时间与所述图像信号扫描启动时间错位，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
优选地，A>B+24HZ。
本发明实施例还提出一种控制液晶显示的液晶显示器，包括：
启动模块，用于在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，所述液晶显示面板的图像信号和背光板的调光信号的相位异步；所述背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
优选地，所述调光信号扫描启动时间晚于所述图像信号扫描启动时间。
优选地，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
优选地，所述调光信号扫描启动时间与所述图像信号扫描启动时间错位，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
优选地，A>B+24HZ。
本发明实施例提出的一种液晶显示控制方法及液晶显示器，在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，所述液晶显示面板的图像信号和背光板的调光信号的相位异步；背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，由此避免了背光相对屏扫描出现闪烁现象，提升了液晶电视等液晶显示器的显示画质效果，使产品具有高性价比，提升产品市场竞争力。
附图说明
图1是传统的背光与液晶显示面板的扫描频率设计，搭载机芯画质处理功能，对应的单像素点时序图；
图2 为传统的背光与液晶显示面板的扫描频率设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S个周期积分平均的RGB亮度变化曲线；
图3是本发明实施例的背光与液晶显示面板的相位异步扫描设计，搭载机芯画质处理功能，对应的单像素点的一种时序图；
图4是本发明实施例的背光与液晶显示面板的相位异步扫描设计，搭载机芯画质处理功能，对应的单像素点的另一种时序图；
图5是本发明实施例的背光与液晶显示面板异步扫描设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S个周期积分平均的RGB亮度变化曲线。
为了使本发明的技术方案更加清楚、明了，下面将结合附图作进一步详述。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例的解决方案主要是：在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，液晶显示面板的图像信号和背光板的调光信号的相位异步；；此外，背光调光信号频率（背光驱动板PWM频率）A，与液晶显示面板的扫描频率B不同，同时，为避免背光相对屏扫描出现闪烁现象，背光扫描频率至少大于屏扫描频率24HZ，即A>B+24HZ，且A≠N*B（N=1，2，…），通过上述时序设计，可极大地提升液晶显示画质效果。
本发明较佳实施例提出一种液晶显示控制方法，包括：
在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，所述液晶显示面板的图像信号和背光板的调光信号的相位异步；所述背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
由于现有技术中，在背光Duty<100%时，背光存在亮暗闪烁状态，同时，背光与液晶显示面板采用同步扫描，造成画面画质出现异常。
本实施例方案背光板的调光信号与液晶显示面板异步扫描，即使液晶显示面板的图像信号和背光板的调光信号的相位异步，并调节背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B不同，搭配机芯画质处理功能，可以避免背光相对屏扫描出现闪烁现象，实现液晶显示画质的最佳化。
具体地，在液晶显示器通电后，首先，液晶显示器的机芯向液晶显示面板的屏驱动输入图像信号扫描控制信号，液晶显示面板的屏驱动根据接收到的图像信号扫描控制信号，启动图像信号扫描，液晶显示面板内的液晶分子开始旋转；此外，液晶显示面板的屏驱动向背光驱动反馈相应的控制信号，背光驱动接收到液晶显示面板反馈的控制信号后，启动调光信号扫描，并对背光板的背光开启时刻进行控制，周期性控制亮暗开关进行调光。
在本实施例中，通过使背光调光信号扫描的启动时间相比液晶显示面板的图像信号扫描的启动时间T1具有一定延时，以及调节背光调光信号扫描频率和液晶显示面板的图像信号扫描频率不同，实现背光板的调光信号与屏的扫描相位异步。
为了防止液晶旋转所产生的模糊效果被人眼察觉，一般地，在液晶旋转开始后及结束前的1/5*Tr（Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间）时间内，认为液晶所处状态与其开始旋转前或结束旋转后的稳定状态一致，因此，在此区间内，背光进行开启动作，不会衍生画质不良问题。
基于上述考虑，本实施例在对背光板的背光开启时刻进行控制时，具体可以采用如下方案：
作为一种实施方式，可以参考图3所示，在液晶显示器通电后，启动液晶显示面板的图像信号扫描，启动时间为T1，控制背光板的调光信号的开始扫描时间与液晶显示面板的图像信号的开始扫描时间T1不相等，调光信号扫描启动时间晚于图像信号扫描启动时间；此外，在T1之后的△T时间内启动背光，所述△T为液晶显示面板的液晶分子旋转开始后的1/5*Tr，即控制背光板的背光开启时刻在液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
作为另一种实施方式，可以参考图4所示，在液晶显示器通电后，启动液晶显示面板的图像信号扫描，启动时间为T1；调光信号扫描启动时间与所述图像信号扫描启动时间错位，在T1之后的Tr-△T时间内启动背光，所述△T为液晶显示面板的液晶分子旋转结束前的1/5*Tr，即控制背光板的背光开启时刻在液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
在启动液晶显示面板的图像信号扫描和背光调光信号扫描后，调节背光驱动板PWM频率A，使其与液晶显示面板的扫描频率B异步，同时，为避免背光相对屏扫描出现闪烁现象，使背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，作为一种优选方案，背光扫描频率至少大于屏扫描频率24HZ，即A>B+24HZ，且A≠N*B（N=1，2，…）。上述时序设计，可极大地提升液晶显示画质效果。
本实施例通过上述方案，在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，液晶显示面板的图像信号和背光板的调光信号的相位异步；背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，由此避免了背光相对屏扫描出现闪烁现象，提升了液晶电视等液晶显示器的显示画质效果，使产品具有高性价比，提升产品市场竞争力。
进一步地，为例测试本发明实施例对画质的改善效果，可以引入MPRT仪器测试仿真结果作为画质判断标准。
其中，MPRT仪器是模拟人眼观察运动画面画质效果，并将其用图表方式进行量化的测试仪器。
参照图1及图2所示，图1为传统的背光（BLU）与液晶显示面板（Open Cell）的扫描频率设计，搭载机芯画质处理功能，对应的单像素点时序图。
图2为传统的背光与液晶显示面板的扫描频率设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S(S≥20)个周期积分平均的RGB亮度变化曲线。
由于传统的背光与液晶显示面板为同步扫描，单个像素点在S个周期内，背光开关与液晶显示面板扫描一直处于同一相位，积分后，从曲线中可明显观察到RGB曲线存在拐点，即背光亮暗闪烁会被捕捉到，反应到人眼的画质效果变差。
参照图3和图4所示，图3和图4分别为本发明实施例的背光板的调光信号与液晶显示面板的图像信号的相位异步扫描设计，即调节背光启动时间和背光驱动PWM频率后，搭载机芯画质处理功能，对应的单像素点的两种时序图。其中，Tr为液晶在两个画面之间切换所旋转的时间。
为了防止液晶旋转所产生的模糊效果被人眼察觉，一般地，在液晶旋转开始后及结束前的1/5*Tr时间内，认为液晶所处状态与其开始旋转前或结束旋转后的稳定状态一致，因此，在此区间内，背光进行开启动作，不会衍生画质不良问题。
本实施例中，背光与液晶显示面板的相位异步设计中，液晶显示面板的扫描与背光启动时间控制上，需要满足背光开启时刻满足液晶保持稳定状态时刻，即背光开启时刻要延迟于液晶显示面板的扫描开启时刻，背光开启时刻可以在液晶开始旋转时刻后的△T =1/5*Tr时间内（如图3所示时序图），或在液晶结束旋转时刻的前△T= 1/5*Tr时间内（如图4所示时序图）。
参照图5所示，图5为本发明实施例的背光与液晶显示面板异步扫描设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S(S≥20)个周期积分平均的RGB亮度变化曲线。
从图5可以看出，由于本发明的背光与液晶显示面板为异步扫描，单个像素点在S个周期内，背光开关与液晶显示面板的扫描相位是一直变化的，积分后从曲线中可观察到RGB曲线不存在拐点，即背光亮暗闪烁现象被此技术优化，反应到人眼的画质效果改善到最佳状态。
对应地，提出本发明控制液晶显示的液晶显示器。
本发明较佳实施例提出一种控制液晶显示的液晶显示器，包括：启动模块其中：
启动模块201，用于在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，液晶显示面板的图像信号和背光板的调光信号的相位异步；背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
进一步地，所述启动模块201，还用于对背光板的背光开启时刻进行控制，具体用于在液晶显示器通电后，控制背光板的调光信号的开始扫描时间与液晶显示面板的图像信号的开始扫描时间不相等；且控制背光板的背光开启时刻在液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间；或者控制背光板的背光开启时刻在液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
具体地，在液晶显示器通电后，首先，液晶显示器的机芯向液晶显示面板的屏驱动输入图像信号扫描控制信号，液晶显示面板的屏驱动根据接收到的图像信号扫描控制信号，启动图像信号扫描，液晶显示面板内的液晶分子开始旋转；此外，液晶显示面板的屏驱动向背光驱动反馈相应的控制信号，背光驱动接收到液晶显示面板反馈的控制信号后，启动调光信号扫描，并对背光板的背光开启时刻进行控制，周期性控制亮暗开关进行调光。
在本实施例中，通过使背光调光信号扫描的启动时间相比液晶显示面板的图像信号扫描的启动时间T1具有一定延时，所述调光信号扫描启动时间晚于所述图像信号扫描启动时间或者所述调光信号扫描启动时间与所述图像信号扫描启动时间错位，以及调节背光调光信号扫描频率和液晶显示面板的图像信号扫描频率不同，实现背光板的调光信号与屏的扫描相位异步。
为了防止液晶旋转所产生的模糊效果被人眼察觉，一般地，在液晶旋转开始后及结束前的1/5*Tr（Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间）时间内，认为液晶所处状态与其开始旋转前或结束旋转后的稳定状态一致，因此，在此区间内，背光进行开启动作，不会衍生画质不良问题。
基于上述考虑，在对背光板的背光开启时刻进行控制时，具体可以采用如下方案：
作为一种实施方式，可以参考图3所示，在液晶显示器通电后，启动液晶显示面板的图像信号扫描，启动时间为T1，控制背光板的调光信号的开始扫描时间与液晶显示面板的图像信号的开始扫描时间T1不相等，调光信号扫描启动时间晚于图像信号扫描启动时间；此外，在T1之后的△T时间内启动背光，所述△T为液晶显示面板的液晶分子旋转开始后的1/5*Tr，即控制背光板的背光开启时刻在液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
作为另一种实施方式，可以参考图4所示，在液晶显示器通电后，启动液晶显示面板的图像信号扫描，启动时间为T1；调光信号扫描启动时间与所述图像信号扫描启动时间错位，在T1之后的Tr-△T时间内启动背光，所述△T为液晶显示面板的液晶分子旋转结束前的1/5*Tr，即控制背光板的背光开启时刻在液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
在启动液晶显示面板的图像信号扫描和背光调光信号扫描后，调节背光驱动板PWM频率A，使其与液晶显示面板的扫描频率B异步，同时，为避免背光相对屏扫描出现闪烁现象，使背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，作为一种优选方案，背光扫描频率至少大于屏扫描频率24HZ，即A>B+24HZ，且A≠N*B（N=1，2，…）。上述时序设计，可极大地提升液晶显示画质效果。
本实施例通过上述方案，在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，液晶显示面板的图像信号和背光板的调光信号的相位异步；背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，由此避免了背光相对屏扫描出现闪烁现象，提升了液晶电视等液晶显示器的显示画质效果，使产品具有高性价比，提升产品市场竞争力。
进一步地，为例测试本发明实施例对画质的改善效果，可以引入MPRT仪器测试仿真结果作为画质判断标准。
其中，MPRT仪器是模拟人眼观察运动画面画质效果，并将其用图表方式进行量化的测试仪器。
参照图1及图2所示，图1为传统的背光（BLU）与液晶显示面板（Open Cell）的扫描频率设计，搭载机芯画质处理功能，对应的单像素点时序图。
图2 为传统的背光与液晶显示面板的扫描频率设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S(S≥20)个周期积分平均的RGB亮度变化曲线。
由于传统的背光与液晶显示面板为同步扫描，单个像素点在S个周期内，背光开关与液晶显示面板扫描一直处于同一相位，积分后，从曲线中可明显观察到RGB曲线存在拐点，即背光亮暗闪烁会被捕捉到，反应到人眼的画质效果变差。
参照图3和图4所示，图3和图4分别为本发明实施例的背光板的调光信号与液晶显示面板的图像信号的相位异步扫描设计，即调节背光启动时间和背光驱动PWM频率后，搭载机芯画质处理功能，对应的单像素点的两种时序图。其中，Tr为液晶在两个画面之间切换所旋转的时间。
为了防止液晶旋转所产生的模糊效果被人眼察觉，一般地，在液晶旋转开始后及结束前的1/5*Tr时间内，认为液晶所处状态与其开始旋转前或结束旋转后的稳定状态一致，因此，在此区间内，背光进行开启动作，不会衍生画质不良问题。
本实施例中，背光与液晶显示面板的相位异步设计中，液晶显示面板的扫描与背光启动时间控制上，需要满足背光开启时刻满足液晶保持稳定状态时刻，即背光开启时刻要延迟于液晶显示面板的扫描开启时刻，背光开启时刻可以在液晶开始旋转时刻后的△T =1/5*Tr时间内（如图3所示时序图），或在液晶结束旋转时刻的前△T= 1/5*Tr时间内（如图4所示时序图）。
参照图5所示，图5为本发明实施例的背光与液晶显示面板异步扫描设计，搭载机芯画质处理功能，使用MPRT仪器测试运动画面切换过程，单个像素点S(S≥20)个周期积分平均的RGB亮度变化曲线。
从图5可以看出，由于本发明的背光与液晶显示面板为异步扫描，单个像素点在S个周期内，背光开关与液晶显示面板的扫描相位是一直变化的，积分后从曲线中可观察到RGB曲线不存在拐点，即背光亮暗闪烁现象被此技术优化，反应到人眼的画质效果改善到最佳状态。
本发明实施例液晶显示控制方法及液晶显示器，在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，使液晶显示面板的图像信号和背光板的调光信号的相位异步；调节背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B，使背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数，由此避免了背光相对屏扫描出现闪烁现象，提升了液晶电视等液晶显示器的显示画质效果，使产品具有高性价比，提升产品市场竞争力。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种液晶显示控制方法，其特征在于，包括：
    在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，
    所述液晶显示面板的图像信号和背光板的调光信号的相位异步；
    所述背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
  2. 根据权利要求1所述的方法，其特征在于，所述调光信号扫描启动时间晚于所述图像信号扫描启动时间。
  3. 根据权利要求2所述的方法，其特征在于，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
  4. 根据权利要求1所述的方法，其特征在于，所述调光信号扫描启动时间与所述图像信号扫描启动时间错位。
  5. 根据权利要求4所述的方法，其特征在于，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
  6. 根据权利要求1所述的方法，其特征在于，A>B+24HZ。
  7. 根据权利要求2所述的方法，其特征在于，A>B+24HZ。
  8. 根据权利要求3所述的方法，其特征在于，A>B+24HZ。
  9. 根据权利要求4所述的方法，其特征在于，A>B+24HZ。
  10. 根据权利要求5所述的方法，其特征在于，A>B+24HZ。
  11. 一种控制液晶显示的液晶显示器，其特征在于，包括：
    启动模块，用于在液晶显示器通电后，启动液晶显示面板的图像信号扫描和背光板的调光信号扫描，所述液晶显示面板的图像信号和背光板的调光信号的相位异步；所述背光调光信号扫描频率A和液晶显示面板的图像信号扫描频率B的关系满足：A>B，且A≠N*B，其中，N为大于0的整数。
  12. 根据权利要求11所述的液晶显示器，其特征在于，所述调光信号扫描启动时间晚于所述图像信号扫描启动时间。
  13. 根据权利要求12所述的液晶显示器，其特征在于，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶开始旋转时刻后的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
  14. 根据权利要求11所述的液晶显示器，其特征在于，所述调光信号扫描启动时间与所述图像信号扫描启动时间错位。
  15. 根据权利要求14所述的液晶显示器，其特征在于，所述背光板的背光初次开启时刻在所述液晶显示面板的液晶结束旋转时刻前的1/5*Tr时间内，其中，Tr为液晶显示面板的液晶分子在两个画面之间切换所旋转的时间。
  16. 根据权利要求11所述的液晶显示器，其特征在于，A>B+24HZ。
  17. 根据权利要求12所述的液晶显示器，其特征在于，A>B+24HZ。
  18. 根据权利要求13所述的液晶显示器，其特征在于，A>B+24HZ。
  19. 根据权利要求14所述的液晶显示器，其特征在于，A>B+24HZ。
  20. 根据权利要求15所述的液晶显示器，其特征在于，A>B+24HZ。
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