WO2013071641A1 - 快门眼镜式3d显示器的工作方法 - Google Patents

快门眼镜式3d显示器的工作方法 Download PDF

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Publication number
WO2013071641A1
WO2013071641A1 PCT/CN2011/083002 CN2011083002W WO2013071641A1 WO 2013071641 A1 WO2013071641 A1 WO 2013071641A1 CN 2011083002 W CN2011083002 W CN 2011083002W WO 2013071641 A1 WO2013071641 A1 WO 2013071641A1
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Prior art keywords
liquid crystal
block
max
time
backlight unit
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PCT/CN2011/083002
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English (en)
French (fr)
Inventor
康志聪
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/381,937 priority Critical patent/US8836774B2/en
Priority to DE112011105858.6T priority patent/DE112011105858B4/de
Publication of WO2013071641A1 publication Critical patent/WO2013071641A1/zh
Anticipated expiration legal-status Critical
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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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/024—Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2213/00—Details of stereoscopic systems
    • H04N2213/008—Aspects relating to glasses for viewing stereoscopic images

Definitions

  • the present invention relates to the field of 3D display technologies, and in particular, to a method for operating a shutter glasses type 3D display. Background technique
  • the glasses-type 3D display technology uses left and right eye frame signals to be alternately output to the liquid crystal panel, and the left and right eye images are respectively formed on the driving liquid crystal panel, and the scanning BLU (scanning backlight unit) is combined with the shutter glasses.
  • the timing control of the shutter glass causes the left and right eye signals to stimulate the left and right eyes, respectively, so that people can feel the 3D image. Since the response speed of the LCD screen is too slow, it is necessary to adjust the timing of the BLU (backlight unit) on and the opening of the shutter glasses and the duty time to reduce the influence of crosstalk between left and right eyes. However, due to the timing control, the backlight and shutter glasses are turned on, causing the brightness to drop or flicker.
  • FIG. 1 it is a timing diagram of a conventional shutter glasses type 3D display.
  • the vertical axis represents the up and down position of the display panel, and the horizontal axis represents time.
  • the BLU of the 3D display is divided by the horizontal block, so the scanning mode is to control the opening and working of each block of the backlight unit from top to bottom.
  • the time (as shown in Figure 1 is illustrated by the five blocks of Sl, S2, S3, S4 and S5).
  • the display shows that the left eye signal and the right eye signal time are T1 and T2, respectively, each representing a frame time.
  • the time of a frame is composed of signal (signal) driving time (signal from the first column to the last column) and blanking (blanking) time.
  • the signal sequentially supplies the required driving voltage for each column of the liquid crystal panel from top to bottom. After the pixel (pixel) is charged by the driving voltage, the liquid crystal starts to react. Due to the pixel design and the viscous characteristics of the liquid crystal, a liquid crystal reaction time is required. L0 can fully reach the desired steady state, that is, the target luminance signals of the left and right eyes.
  • another important parameter of the shutter glasses type 3D display is the opening and closing time of the left and right eyes of the shutter glasses, and the shutter mirror time is matched with the scanning time of each block of the backlight unit, the liquid crystal reaction time and the blanking time for overall adjustment, so that the liquid crystal display can be made.
  • the 3D effect can be optimized, and the left and right eye signals will not overlap to produce image sticking. Otherwise, as shown in Figure 1, during the opening of the left-eye shutter glasses, the signal of the liquid crystal corresponding to the S1 block has been changed from the left-eye signal to the right-eye signal, causing the left-eye shutter glasses to see the signal of the right eye during the opening. Therefore, the left eye shutter glasses will see the left eye signal afterimage for a short period of time when the S1 block is working.
  • the left eye shutter has a longer opening time, and the left eye signals are given when the blocks S2, S3, S4 and S5 are working, and Due to the slow response of the liquid crystal, the blocks S2, S3, S4 and S5 will have the effect of different degrees of the previous right eye image at the same time, and there will be interference with the residual image.
  • keyboards are increasingly used in outdoor and public places, but when used outdoors and in public places, due to the dust in the external environment, dust can easily fall into the keyboard through the surface gap of the device, which is increasingly accumulated. Moreover, it is difficult to clean up, and it is easy to affect the performance and service life of the keyboard in the long run. Summary of the invention
  • the present invention provides a shutter glass type 3D display working method, wherein the left and right eye frame signals are alternately output to the liquid crystal panel, and the liquid crystal panel is driven to form left and right eye images respectively, which cooperates with the scanning backlight unit.
  • the respective blocks are The working time is divided into the working time before the liquid crystal is completely reacted and the working time duty2 after the liquid crystal is completely reacted.
  • the brightness of each block in the time of dutyl and duty2 is adjusted respectively, so that the brightness of each liquid crystal in the block is dutyl and duty2. Equal to the target brightness.
  • the maximum signal gradation of the liquid crystal corresponding to each block of the backlight unit is corrected to Max, and the liquid crystal corresponding to the mth block of the backlight unit is represented by T, Max , m .
  • the liquid crystal transmittance corresponding to Max, m indicates that the pixel pixel is located in the liquid crystal corresponding to the mth block of the backlight unit, and M represents the original frame original maximum signal gray of the liquid crystal corresponding to the mth block of the backlight unit.
  • T M represents the liquid crystal transmittance corresponding to the signal gray scale M
  • T m , pixel , Q represents the current frame original transmittance of the pixel pixel in the liquid crystal corresponding to the mth block of the backlight unit;
  • the dutyl time is divided into n sub-times dutyl l to dutyl, and the maximum signal gradation of the liquid crystal corresponding to each block of the backlight unit is corrected to Max at each sub-time, represented by T, Max , m , n
  • the liquid crystal transmittance corresponding to Max, m indicates that the pixel pixel is located in the liquid crystal corresponding to the mth block of the backlight unit, and M represents the original frame original maximum signal gray of the liquid crystal corresponding to the mth block of the backlight unit.
  • T M represents the liquid crystal transmittance corresponding to the signal gray scale M
  • T m , pixel , Q represents the current frame original transmittance of the pixel pixel in the liquid crystal corresponding to the mth block of the backlight unit;
  • target luminance the maximum steady-state gray signal transmittance of the liquid crystal corresponding to each block X
  • the opening time of each block backlight X the backlighting of the driving current after each block compensation
  • the target luminance of the liquid crystal corresponding to each block is the maximum luminance of the liquid crystal 2D corresponding to each block or the maximum luminance of the liquid crystal 3D corresponding to each block.
  • the calculation method of the average transient transmittance is: measuring a gray to gray response curve of the liquid crystal (switching from one gray level to another gray level), and according to the number of segments to be segmented, The response curve is used as a time aliquot according to the number of segments to be segmented, and the transmittance of each aliquot interval time is obtained from the response curve.
  • the working method of the shutter glasses type 3D display of the invention can alleviate the image sticking phenomenon caused by left and right eye crosstalk, and does not need to shorten the working time of each block of the BLU; and can calculate the dynamic penetration rate of the compensation signals of each section in each block, for individual blocks
  • the LED current amplification signal in each interval is compensated to reduce the backlight LED current overdrive, reduce the number of required backlight LEDs and achieve energy saving.
  • 1 is a timing diagram of a conventional shutter glasses type 3D display
  • 2 is a timing diagram of a first preferred embodiment of a method for operating a shutter glasses type 3D display according to the present invention
  • Fig. 3 is a timing chart showing a second preferred embodiment of the operation method of the shutter glasses type 3D display of the present invention. detailed description
  • a timing diagram of a first preferred embodiment of the method for operating a shutter glass type 3D display of the present invention can control the shutter current-type 3D display with the slightest image sticking phenomenon by controlling the LED current power, working time and signal of each block of the backlight S1, S2, S3, S4, S5.
  • the LED turn-on time of each block backlight does not need to be turned on after the liquid crystal reaction. Since the working time of each block of the backlight unit is as long as possible, the duty time of each block needs to be divided into dutyl before the liquid crystal is completely reacted and duty2 after the liquid crystal is completely reacted. Before and after the reaction, due to the difference in liquid crystal transmittance, it must be supplemented by backlight brightness control.
  • the overall luminance signal is maintained, so that the corresponding liquid crystals of each block are in dutyl and duty2 time.
  • the luminance is equal to the target luminance.
  • the penetration rate of the dutyl time before the liquid crystal is completely reacted is called the transient transmittance
  • the transmittance of the duty 2 time after the liquid crystal is completely reacted is called the steady state transmittance.
  • the transient transmittance changes continuously with the liquid crystal reaction.
  • the calculation method of the average transient transmittance is: measuring the gray-scale response curve of the liquid crystal, and according to the number of segments of the time block, the response curve is determined according to the desired The number of segments is equated in time, and the response curve is used to obtain the penetration rate of each equal interval time.
  • the target luminance of the liquid crystal corresponding to each block is the maximum luminance of the liquid crystal 2D corresponding to each block or the maximum luminance of the liquid crystal 3D corresponding to each block. According to FIG.
  • Working time of each block backlight X Each block compensates for the backlight luminance under the driving current. By adjusting the LED current of each block, the brightness of the liquid crystal panel can maintain the brightness level of 2D, or meet the required brightness level of 3D.
  • This method has the advantage that the LED of the backlight unit can be turned on after the liquid crystal reaction is not completed, thereby avoiding the reduction of the brightness of the LED by the shortening of the opening time of the LED and the need to maintain the 3D luminance by the amplified LED driving current. demand.
  • To compensate for crosstalk caused by slow response speed. Wait until the duty2 time after the liquid crystal reaction is completed.
  • the signal compensation is used to increase the average transmittance by amplifying the signal or reduce the average transmission rate by reducing the signal, the signal level at the time of stabilization must exceed the requirement of the original picture signal. Amplification or reduction of the LED drive current is maintained to maintain the overall luminance signal.
  • the maximum signal gradation of the liquid crystal corresponding to each block of the backlight unit is corrected to Max, and the liquid crystal corresponding to the mth block of the backlight unit is represented by T, Max , m .
  • m indicates that the pixel pixel is located in the liquid crystal corresponding to the mth block of the backlight unit
  • M represents the original frame original maximum signal gray level of the liquid crystal corresponding to the mth block of the backlight unit.
  • T M represents the liquid crystal transmittance corresponding to the signal gray scale M
  • T m , pixel , Q represents the original frame original transmittance of the pixel pixel in the liquid crystal corresponding to the mth block of the backlight unit;
  • the original left or right eye S1 block corresponds to the maximum liquid crystal signal of gray N, the liquid crystal transmittance T N , and the liquid crystal luminance is L N , and the backlight is controlled by the BLU current.
  • the liquid crystal corresponding to the SI block is enlarged to 255 gray scale except for the pixel of the maximum signal gray scale N, and the remaining pixel transmittance in this block is amplified to the desired signal according to the magnification of T 255 / 1 ⁇ .
  • a timing diagram of a second preferred embodiment of the method for operating a shutter glasses type 3D display of the present invention is a one-step improvement to the first embodiment. Since the transient brightness variation in dutyl is uncertain, the average penetration rate of Dutyl in Example 1 can be further divided into several sub-working times (dutyl l, dutyl2, dutyl3, dutyl4), and different transient penetrations are given. Rate estimation, increasing the accuracy of the dutyl internal luminance representation.
  • the transient penetration rate during dutyl can be dutyy transient transmittance T' 255 , dutyl2 transient penetration rate T " 255 , dutyl3 transient penetration rate T'" 255 , dutyl4 transient penetration rate ⁇ "" 255 .
  • the working method of the shutter glasses type 3D display of the present invention can reduce the residual image caused by left and right eye crosstalk, and does not need to shorten the working time of each block of the BLU; and can calculate the dynamic penetration rate of the compensation signals of each interval in each block. It compensates for the LED current amplification signal in individual intervals in individual blocks, reduces backlight LED current overdrive, reduces the number of required backlight LEDs and can achieve energy saving.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种快门眼镜式3D显示器的工作方法，采用左、右眼帧信号交替输出至液晶面板，配合扫描式背光单元的照射加上快门眼镜的时序控制，使左、右眼信号分别刺激左、右眼，从而感受3D图像，其中，在当前帧信号期间，所述背光单元的各区块的工作时间分别介于各区块所对应液晶在当前帧信号驱动下开始反应的时刻与各区块所对应液晶在随后帧信号驱动下开始反应的时刻之间，将所述各区块的工作时间划分为液晶完全反应前工作时间duty1及液晶完全反应后工作时间duty2，分别调整各区块在duty1和duty2时间的辉度，使得各区块各自所对应的液晶在duty1和duty2时间的辉度都等于目标辉度。该工作方法可以减轻左右眼串扰造成的残影现象，无须缩短BLU各区块工作时间。

Description

快门眼镜式 3D显示器的工作方法 技术领域
本发明涉及 3D显示技术领域， 尤其涉及一种快门眼镜式 3D显示器 的工作方法。 背景技术
目前眼镜式 3D显示技术大多使用左、 右眼帧 （frame )信号交替输出 至液晶面板， 驱动液晶面板上分别形成左、 右眼图像， 配合 scanning BLU (扫描式背光单元） 的照射加上快门眼镜 ( shutter glass ) 的时序控制， 使 左、 右眼信号分别刺激左、 右眼， 从而使人感受 3D 图像。 由于液晶屏响 应速度过慢， 所以必须调整 BLU (背光单元）开启及快门眼镜开启的时序 及 duty (工作） 时间， 以减少左右眼信号串扰（crosstalk ) 的影响。 但也 由于时序的控制减少了背光及快门眼镜开启时间， 造成辉度下降或闪烁的 现象。
如图 1 所示， 其为现有快门眼镜式 3D显示器的时序示意图。 纵轴代 表显示器面板的上下位置， 横轴代表时间， 一般 3D显示器的 BLU是以水 平区块上下作区隔， 因此 scanning (扫描） 方式是由上往下依序控制背光 单元各区块开启及工作时间（如附图 1所示， 以 Sl、 S2、 S3、 S4及 S5五 区块来举例说明）。 显示器显示左目艮信号及右目艮信号时间分别为 T1及 T2, 各代表一个帧的时间。 一个帧的时间是由 signal (信号）驱动时间 (信号由 第一列到最后一列）及 blanking (消隐） 时间所组成。 信号依序由上而下给 与液晶面板各列所需驱动电压， pixel (像素）在收到驱动电压充电后， 液 晶才开始反应， 由于 pixel设计及液晶的粘滞特性， 需要一段液晶反应时 间 L0 才能完全达到所需稳定态， 也就是左右眼各自的目标辉度信号。 此 夕卜， 快门眼镜式 3D显示器另一个重要参数为快门眼镜左右眼开启及关闭 时间， 快门目艮镜时间配合背光单元各区块 scanning时间、 液晶反应时间及 blanking 时间作整体调整， 才能使得液晶显示器 3D 效果可以最佳化， 左 右眼信号才不会重迭产生残影现象。 否则就如同图 1 所示， 左眼快门眼镜 开启期间， S1 区块所对应液晶的信号已经由左眼信号换成了右眼的信号， 造成左眼快门眼镜开启期间看到右眼的信号， 因此 S1 区块工作时左眼快 门眼镜有一小段时间会看到右眼信号残影。 另外， 如图 1 所示， 左眼快门 目艮镜开启时间较早， 区块 S2、 S3、 S4及 S5工作时给与左眼信号， 同时， 由于液晶反应緩慢， 区块 S2、 S3、 S4及 S5工作时会同时存在不同程度前 一个右眼画面的影响， 也会有残影的情况干扰。
此外， 键盘也越来越多在户外和公共场所被使用， 但在户外和公共场 所使用时， 由于外界环境中的灰尘较多， 灰尘极易通过设备表面间隙落入 键盘中， 其日益积存， 而且难以清理， 长此以往容易影响到键盘的性能和 使用寿命。 发明内容
因此， 本发明的目的在于提供一种快门眼镜式 3D 显示器的工作方 法， 减轻快门眼镜式式 3D显示器的残影现象。
为实现上述目的， 本发明提供一种快门眼镜式 3D 显示器的工作方 法， 釆用左、 右眼帧信号交替输出至液晶面板， 驱动液晶面板分别形成 左、 右眼图像， 配合扫描式背光单元的照射加上快门眼镜的时序控制， 使 左、 右眼信号分别刺激左、 右眼， 从而感受 3D 图像， 其中， 在当前帧信 号期间， 所述背光单元的各区块的工作时间分别介于各区块所对应液晶在 当前帧信号驱动下开始反应的时刻与各区块所对应液晶在随后帧信号驱动 下开始反应的时刻之间， 根据液晶在当前帧信号驱动下完全反应的时刻将 所述各区块的工作时间划分为液晶完全反应前工作时间 dutyl 及液晶完全 反应后工作时间 duty2 , 分别调整各区块在 dutyl和 duty2时间的辉度， 使 得各区块各自所对应的液晶在 dutyl 和 duty2 时间的辉度都等于目标辉 度。
其中， 对于所述背光单元的各区块所对应液晶内的各像素：
在 dutyl 时间， 将所述背光单元的各区块所对应液晶的最大信号灰度 修正为 Max, 以 T，Max,m来表示所述背光单元的第 m个区块所对应液晶在信号 灰度 Max下的平均暂态穿透率， 其中， Max表示所述液晶面板的最大信号 灰度；
在 duty2 时间， 分别改变各像素的穿透率为 Tm,pixd = Tm,pixd,QxTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， TMax表示信号灰度 Max对 应的液晶穿透率， m表示像素 pixel位于所述背光单元的第 m个区块所对应 的液晶， M表示所述背光单元的第 m个区块所对应液晶的当前帧原始最大 信号灰度， TM表示信号灰度 M对应的液晶穿透率， Tm,pixel,Q表示所述背光单 元的第 m个区块所对应液晶内像素 pixel的当前帧原始穿透率；
根据公式： 目标辉度 = T，Max,mxB，Max,m = TMaxxBMax,m调整所述背光单元 的第 m个区块的在 dutyl时间的辉度 B，Max,m和在 duty2时间的辉度 BMax,m。 其中， 对于所述背光单元的各区块所对应液晶内的各像素：
将所述 dutyl 时间划分为 n个子时间 dutyl l 至 dutyln, 在每个子时间， 将所述背光单元的各区块所对应液晶的最大信号灰度修正为 Max , 以 T，Max,m,n来表示第 n个子时间所述背光单元的第 m个区块所对应液晶在信号 灰度 Max下的平均暂态穿透率， 其中， Max表示所述液晶面板的最大信号 灰度， n为大于等于 2的自然数；
在 duty2 时间， 分别改变各像素的穿透率为 Tm,pixd = Tm,pixd,QxTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， TMax表示信号灰度 Max对 应的液晶穿透率， m表示像素 pixel位于所述背光单元的第 m个区块所对应 的液晶， M表示所述背光单元的第 m个区块所对应液晶的当前帧原始最大 信号灰度， TM表示信号灰度 M对应的液晶穿透率， Tm,pixel,Q表示所述背光单 元的第 m个区块所对应液晶内像素 pixel的当前帧原始穿透率；
根据公式： 目标辉度 = T，Max,m,nXB，Max,m,n = TMaxXBMax^jf整所述背光单 元的第 m个区块的在 duty In子时间的辉度 B，Max,m,n和在 duty2 时间的辉度 其中， 所述目标辉度 =各区块所对应液晶的最大稳态灰度信号穿透率 X各区块背光的开启时间 X各区块补偿后驱动电流下的背光辉度； 其中， 各 区块所对应液晶的目标辉度为各区块所对应液晶 2D 最大辉度或各区块所 对应液晶 3D最大辉度。
所述平均暂态穿透率的计算方法为： 测量液晶的灰阶响应曲线 （gray to gray response curve, 从一个灰阶切换到另一个灰阶） ， 并根据区块时间 欲分段数目， 将响应曲线（response curve )根据欲分段数目作时间等份， 由响应曲线求得各等份区间时间的穿透率。
本发明的快门眼镜式 3D显示器的工作方法可以减轻左右眼串扰造成 的残影现象， 无须缩短 BLU各区块工作时间； 可以通过计算各区块内各 区间补偿信号的动态穿透率， 对个别区块内个别区间的 LED 电流放大信 号作补偿， 减少背光 LED电流过驱动， 减少背光 LED所需颗数需求并且 可以达到节能的目的。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为现有快门眼镜式 3D显示器的时序示意图； 图 2为本发明快门眼镜式 3D显示器的工作方法第一较佳实施例的时 序示意图；
图 3为本发明快门眼镜式 3D显示器的工作方法第二较佳实施例的时 序示意图。 具体实施方式
参见图 2, 其为本发明快门眼镜式 3D 显示器的工作方法第一较佳实 施例的时序示意图。 本发明通过控制背光的 S1,S2,S3,S4,S5各区块 LED电 流 power、 工作时间及信号作搭配补偿方式让快门眼镜式 3D显示器能有 最轻微的残影现象发生。 各区块背光的 LED 开启时间无须为液晶反应后 才开启， 由于背光单元各区块工作时间尽可能加长， 但需将各区块 duty时 间分割为液晶完全反应前 dutyl及液晶完全反应后 duty2。 反应前及反应后 由于液晶穿透率的差异， 必须辅以背光辉度控制， 例如通过控制背光 LED 电流大小， 维持整体辉度信号不变， 使得各区块各自所对应的液晶在 dutyl和 duty2时间的辉度都等于目标辉度。 将液晶完全反应前 dutyl时间 的穿透率称为暂态穿透率， 将液晶完全反应后 duty2 时间的穿透率称为稳 态穿透率。 在 dutyl 时间暂态穿透率随液晶反应而不断变化， 平均暂态穿 透率的计算方法为： 测量液晶的灰阶响应曲线， 并根据时间区块欲分段数 目， 将响应曲线根据欲分段数目作时间等份， 由响应曲线求得各等份区间 时间的穿透率。
以 8 bit液晶为例， 目标辉度 =各区块最大稳态灰度信号穿透率 x2D背 光辉度 =各区块所对应液晶 dutyl时间放大成 255灰度信号的平均暂态穿透 率 X各区块 dutyl 时间的背光辉度=各区块所对应液晶 duty2 时间放大成 255灰度的稳态穿透率 X各区块 duty2 时间的背光辉度。 各区块所对应液晶 的目标辉度为各区块所对应液晶 2D 最大辉度或各区块所对应液晶 3D 最 大辉度。 根据图 2具体来说， 各区块 (S1,S2,S3,S4,S5)对应液晶的 2D最大 辉度或各区块 (S1,S2,S3,S4,S5)对应液晶的 3D 最大辉度=最大穿透率（以 8 bit液晶为例， 为灰度 255的穿透率） X各区块背光的工作时间 X各区块补偿 后驱动电流下的背光辉度。 通过调整提高各区块的 LED 电流可使得液晶 面板辉度可以维持 2D的辉度水准， 或者满足 3D所需辉度水准。
此一作法有一个好处， 可以在不需液晶反应完全后再开启背光单元的 LED, 避免了因为缩短了 LED的开启时间降低了辉度而需要再通过放大的 LED驱动电流来维持 3D辉度的需求。 在液晶未完全反应的区间 dutyl 时 间内， 先通过放大信号增加等效穿透率或者缩小信号减少等效穿透率的方 式， 补偿因响应速度过慢造成的串扰现象。 等到液晶反应完全后的 duty2 时间， 先前因为使用信号补偿先通过放大信号增加平均穿透率或者缩小信 号减少平均穿透率， 稳定时的信号水准势必已经超过原始画面信号的要 求， 此时要再辅以 LED 驱动电流的放大或减小让整体辉度信号维持不 变。
对于背光单元的各区块所对应液晶内的各像素：
在 dutyl 时间， 将所述背光单元的各区块所对应液晶的最大信号灰度 修正为 Max, 以 T，Max,m来表示所述背光单元的第 m个区块所对应液晶在信号 灰度 Max下的平均暂态穿透率， 其中， Max表示所述液晶面板的最大信号 灰度；
在 duty2 时间， 分别改变各像素的穿透率为 Tm,pixd = Tm,pixd,QxTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， TMax表示信号灰度 Max 对应的液晶穿透率， m表示像素 pixel位于所述背光单元的第 m个区块所对 应的液晶， M表示所述背光单元的第 m个区块所对应液晶的当前帧原始最 大信号灰度， TM表示信号灰度 M对应的液晶穿透率， Tm,pixel,Q表示所述背光 单元的第 m个区块所对应液晶内像素 pixel的当前帧原始穿透率；
根据公式： 目标辉度 = T，Max,mxB，Max,m = TMaxxBMax,m调整所述背光单元 的第 m个区块的在 dutyl时间的辉度 B，Max,m和在 duty2时间的辉度 BMax,m。
以图 2 中 S1 区块为例加以说明， 原始左眼或右眼 S1 区块对应液晶最 大信号为灰度 N, 液晶穿透率 TN, 液晶辉度为 LN, 通过 BLU电流控制背光 辉度 BN, 根据公式1^=了^：¾, 对于 8bit液晶， 在 dutyl 时， 将最大信号修 正为 255灰度， 此时 255灰度液晶的暂态穿透率为 T，255, 此时调整 BLU电 流来调整背光辉度 B'255 , 使得液晶
Figure imgf000007_0001
接 下来当时间达 duty2时， 此时 255灰度液晶的稳态穿透率表示为 T255, 调整 BLU电流来调整背光辉度 Β255 , 使得 LN=TNxBN=T，255xB，255= T255xB255 , 如 果 T，255<T255则 B，255> B255。
此时， SI 区块所对应的液晶除最大信号灰度 N的像素放大为 255灰度 外， 此一区块内其余 pixel穿透率依 T255/ 1^的倍率放大至所需信号。
参见图 3 , 其为本发明快门眼镜式 3D 显示器的工作方法第二较佳实 施例的时序示意图。 该第二实施例为对第一实施例的经一步改进。 由于 dutyl内的暂态辉度变化不确定， 实施例 1在 dutyl的平均穿透率可以再多 分割成几个子工作时间（dutyl l,dutyl2,dutyl3,dutyl4) , 并给予不同的暂态 穿透率估算， 增加 dutyl内辉度表示的准确度。
将所述 dutyl 时间划分为 n个子时间 dutyl 1、 dutyl2、 duty 13…… duty In, 在每个子时间， 将所述背光单元的各区块所对应液晶的最大信号 灰度修正为 Max , 以 T，Max,m,n来表示第 n个子时间所述背光单元的第 m个区块 所对应液晶在信号灰度 Max下的平均暂态穿透率， 其中， Max表示所述液 晶面板的最大信号灰度， n为大于等于 2的自然数；
根据公式： 目标辉度 = T，Max,m,nxB，Max,m,n = TMaxxBMax,„^整所述背光单 元的第 m个区块的在 duty In子时间的辉度 B，Max,m,n和在 duty2 时间的辉度 因此根据 S1 区块具体来说， dutyl 时间内的暂态穿透率可以为 dutyll 暂态穿透率 T'255 , dutyl2 暂态穿透率 T"255 , dutyl3 暂态穿透率 T'"255 , dutyl4暂态穿透率 Τ""255。
_LN— 1 ΝΧΒΝ— 1 255 x-t> 255—1 255 x-t> 255—1 255x-t> 255—1 255 x-t> 255~ l 255 x 55。
综上所述， 本发明的快门眼镜式 3D显示器的工作方法可以减轻左右 眼串扰造成的残影现象， 无须缩短 BLU各区块工作时间； 可以通过计算 各区块内各区间补偿信号的动态穿透率， 对个别区块内个别区间的 LED 电流放大信号作补偿， 减少背光 LED电流过驱动， 减少背光 LED所需颗 数需求并且可以达到节能的目的。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种快门眼镜式 3D显示器的工作方法， 釆用左、 右眼帧信号交替 输出至液晶面板， 驱动液晶面板分别形成左、 右眼图像， 配合扫描式背光 单元的照射加上快门眼镜的时序控制， 使左、 右眼信号分别刺激左、 右 目艮， 从而感受 3D 图像， 其中， 在当前帧信号期间， 所述背光单元的各区 块的工作时间分别介于各区块所对应液晶在当前帧信号驱动下开始反应的 时刻与各区块所对应液晶在随后帧信号驱动下开始反应的时刻之间， 根据 液晶在当前帧信号驱动下完全反应的时刻将所述各区块的工作时间划分为 液晶完全反应前工作时间 duty 1及液晶完全反应后工作时间 duty2 , 分别调 整各区块在 dutyl 和 duty2 时间的辉度， 使得各区块各自所对应的液晶在 dutyl和 duty2时间的辉度都等于目标辉度。
2、 如权利要求 1所述的快门眼镜式 3D显示器的工作方法， 其中， 对 于所述背光单元的各区块所对应液晶内的各像素：
在 dutyl 时间， 将所述背光单元的各区块所对应液晶的最大信号灰度 修正为 Max, 以 T，Max,m来表示所述背光单元的第 m个区块所对应液晶在信号 灰度 Max下的平均暂态穿透率， 其中， Max表示所述液晶面板的最大信号 灰度；
在 duty2 时间， 分别改变各像素的穿透率为 Tm,pixd = Tm,pixd,QxTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， TMax表示信号灰度 Max对 应的液晶穿透率， m表示像素 pixel位于所述背光单元的第 m个区块所对应 的液晶， M表示所述背光单元的第 m个区块所对应液晶的当前帧原始最大 信号灰度， TM表示信号灰度 M对应的液晶穿透率， Tm,pixel,Q表示所述背光单 元的第 m个区块所对应液晶内像素 pixel的当前帧原始穿透率；
根据公式： 目标辉度 = T，Max,mxB，Max,m = TMaxxBMax,m调整所述背光单元 的第 m个区块的在 dutyl时间的辉度 B，Max,m和在 duty2时间的辉度 BMax,m。
3、 如权利要求 2所述的快门眼镜式 3D显示器的工作方法， 其中， 对 于所述背光单元的各区块所对应液晶内的各像素：
在 dutyl时间， 将所述 dutyl时间划分为 n个子时间 dutyl l至 dutyln, 在 每个子时间， 将所述背光单元的各区块所对应液晶的最大信号灰度修正为 Max , 以 T，Max,m,n来表示第 n个子时间所述背光单元的第 m个区块所对应液晶 在信号灰度 Max下的平均暂态穿透率， 其中， Max表示所述液晶面板的最 大信号灰度， n为大于等于 2的自然数； 在 duty2 时间， 分别改变各像素的穿透率为 Tm,pixd = Tm,pixd,QxTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， TMax表示信号灰度 Max对 应的液晶穿透率， m表示像素 pixel位于所述背光单元的第 m个区块所对应 的液晶， M表示所述背光单元的第 m个区块所对应液晶的当前帧原始最大 信号灰度， TM表示信号灰度 M对应的液晶穿透率， Tm,pixel,Q表示所述背光单 元的第 m个区块所对应液晶内像素 pixel的当前帧原始穿透率；
根据公式： 目标辉度 = T，Max,m,nxB，Max,m,n = 1^£^81^^调整所述背光单 元的第 m个区块的在第 n个子时间的辉度 B，Max,m,n和在 duty2 时间的辉度
B]V[ax,m。
4、 如权利要求 3所述的快门眼镜式 3D显示器的工作方法， 其中， 所 述目标辉度 =各区块所对应液晶的最大稳态灰度信号穿透率 X各区块背光 的工作时间 X各区块补偿后驱动电流下的背光辉度； 其中， 各区块所对应 液晶的目标辉度为各区块所对应液晶 2D最大辉度或各区块所对应液晶 3D 最大辉度。
5、 如权利要求 3所述的快门眼镜式 3D显示器的工作方法， 其中， 所 述平均暂态穿透率的计算方法为： 测量液晶的灰阶响应曲线， 并根据时间 区块欲分段数目， 将响应曲线根据欲分段数目作时间等份， 由响应曲线求 得各等份区间时间的穿透率。
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