WO2013071640A1 - 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
WO2013071640A1
WO2013071640A1 PCT/CN2011/083000 CN2011083000W WO2013071640A1 WO 2013071640 A1 WO2013071640 A1 WO 2013071640A1 CN 2011083000 W CN2011083000 W CN 2011083000W WO 2013071640 A1 WO2013071640 A1 WO 2013071640A1
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Prior art keywords
block
liquid crystal
backlight unit
pixel
signal
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PCT/CN2011/083000
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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 US13/381,936 priority Critical patent/US8842172B2/en
Priority to DE112011105855.1T priority patent/DE112011105855B4/de
Publication of WO2013071640A1 publication Critical patent/WO2013071640A1/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
    • G09G3/20—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
    • 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
    • G09G3/001—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
    • 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. Furthermore, another important parameter of the shutter glasses 3D display is the opening and closing time of the left and right eyes of the shutter glasses, and the shutter glasses time is adjusted together with the scanning time of each block of the backlight unit, the liquid crystal reaction time and the blanking time, so that the 3D effect of the liquid crystal display can be made. Optimized, the left and right eye signals will not overlap to produce image sticking.
  • 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 to see the right eye during the opening of the shutter.
  • 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 work.
  • the blocks S2, S3, S4 and S5 will have different degrees of influence on the previous right eye image at the same time, and there will be interference with the residual image. 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. Irradiation plus timing control of the shutter glasses, so that the left and right eye signals respectively stimulate the left and right eyes, thereby sensing the 3D image, wherein during the current frame signal, the working time of each block of the backlight unit is respectively located in each block The time at which the corresponding liquid crystal is completely reacted under the driving of the current frame signal is between the time when the liquid crystal corresponding to each block starts to react under the driving of the subsequent frame signal.
  • the working time of each block of the backlight unit is equal.
  • Max represents the liquid crystal panel
  • T Max represents the liquid crystal transmittance corresponding to the signal gradation Max
  • m represents the pixel pixel corresponding to the liquid crystal corresponding to the mth block of the backlight unit
  • M represents the mth of the backlight unit
  • T M represents the liquid crystal transmittance corresponding to the signal gradation M
  • T m , pixel representing the pixel in the liquid crystal corresponding to the mth block of the backlight unit Pixel's current frame raw penetration.
  • the compensation value of the driving current of each block of the backlight unit is calculated according to the following formula:
  • the target luminance of the liquid crystal corresponding to each block T Max x
  • the working time of each block backlight X The backlight brightness under the compensation current of each block; wherein, the target luminance of the liquid crystal corresponding to each block is the liquid crystal 2D corresponding to each block The maximum luminance or the maximum luminance of the liquid crystal 3D corresponding to each block.
  • the working method of the shutter glass type 3D display of the invention reduces the residual image caused by left and right eye crosstalk, compensates for the decrease in luminance caused by shortening the working time of each block of the backlight unit, and realizes the effect of energy saving.
  • 1 is a timing diagram of a conventional shutter glasses type 3D display
  • FIG. 2 is a timing diagram of a preferred embodiment of a method for operating a shutter glasses type 3D display of the present invention. detailed description
  • FIG. 2 is a timing diagram of a preferred embodiment of a method for operating a shutter glasses type 3D display according to the present invention.
  • the main process of the shutter glasses type 3D display of the present invention is the same as that of the existing shutter glasses type 3D display.
  • the left and right eye frame signals are alternately output to the liquid crystal panel, and the liquid crystal panels are driven to form left and right eye images respectively.
  • the illumination of the scanning backlight unit and the timing control of the shutter glasses cause the left and right eye signals to respectively stimulate the left and right eyes, thereby sensing the 3D image.
  • the working time of each block (S1, S2, S3, S4, S5 block) of the backlight unit is respectively in each zone.
  • the time at which the liquid crystal corresponding to the block completely reacts under the driving of the current frame signal is between the time when the liquid crystal corresponding to each block starts to react under the driving of the subsequent frame signal. That is to say, the LED turn-on time of each block of the control backlight unit is turned on after the liquid crystal reaction, and the working time of each block must be the time after the liquid crystal is completely reacted to the next frame signal of each liquid crystal in the block (left eye change) Right eye signal) before charging.
  • the operating time of each block of the backlight unit can be set equal. In order to alleviate the image sticking caused by left and right eye crosstalk, the present invention shortens the duty time of the LEDs of each block of the BLU.
  • M represents the original frame original maximum signal gradation of the liquid crystal corresponding to the mth block of the backlight unit
  • T M represents the liquid crystal transmittance corresponding to the signal gradation M
  • T m , pixe i, 0 represents The current frame original transmittance of the pixel pixel in the liquid crystal corresponding to the mth block of the backlight unit.
  • a liquid crystal panel of 8 bit color gradation is taken as an example, and the maximum gray level is 255, and the original maximum signal gray level on the liquid crystal corresponding to the S1 block is N, and the liquid crystal corresponding to the S2 block is The original maximum signal gradation is M.
  • the transmittance of the pixel corresponding to the maximum gray signal N of the liquid crystal corresponding to the S1 block is enlarged to T 255 , and the transmittance of the remaining pixels in the block is The magnification of T 255 / 1 ⁇ amplifies its penetration.
  • S2 transmittance pixel block in addition to the maximum gradation signal is amplified ⁇ 255 [mu], the remaining pixels within a block by transmittance ⁇ 255 / ⁇ ⁇ magnification of its transmittance.
  • the luminance of the liquid crystal panel can be relatively increased.
  • the maximum wavelength of the liquid crystal corresponding to the SI block becomes 255 and the liquid crystal transmittance is amplified by T 255 /T N , and the maximum signal gradation of the liquid crystal corresponding to the S2 block becomes After 255, the transmittance is amplified by T 255 /T M , T 255 /TM ⁇ T 255 /T n , and the S2 block signal magnification caused by changing the liquid crystal gradation is smaller than S1, therefore, in order to maintain the maximum brightness of the liquid crystal panel The degree is relatively stable, and the luminance of the corresponding backlight unit block must be increased.
  • the relative S2 block LED current amplification factor T M /T 255 must be greater than the S1 block LED current amplification factor T N / T 255 .
  • the compensation value of each block driving current of the backlight unit can be calculated according to the following formula:
  • the target luminance of the liquid crystal corresponding to each block T Max x
  • the working time of each block backlight X The backlight brightness under the compensation current of each block; wherein, the target luminance of the liquid crystal corresponding to each block is the liquid crystal 2D corresponding to each block The maximum luminance or the maximum luminance of the liquid crystal 3D corresponding to each block.
  • 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.
  • the invention shortens the brightness decrease caused by the opening time of the LEDs in each block, and can calculate the amplification ratio of the maximum signal through each block, and compensates the LED current amplification signals of the individual blocks to achieve the purpose of energy saving.
  • the invention can make the shutter glasses type 3D display have the slightest residual image phenomenon by controlling the LED current power, duty time and signal of each block of S1, S2, S3, S4, S5.
  • This method has a benefit, because the duty time is the same for each block, but the maximum signal of each block at the moment is the maximum gray signal n in the original block, the penetration rate! Magnified to gray signal 255, transmittance T 255 , the penetration rate is amplified by ⁇ 255 / ⁇ ⁇ , so the corresponding block driving current amplification value can be different according to the reduction of cross-talk phenomenon in each block due to the reduction of working time.
  • the purpose of energy saving is
  • the working method of the shutter glass type 3D display of the present invention alleviates the image sticking phenomenon caused by crosstalk between left and right eyes, compensates for the decrease in luminance caused by shortening the working time of each block of the backlight unit, and achieves the effect of energy saving.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (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，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完全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。该快门眼镜式3D显示器的工作方法减轻了左右眼串扰造成的残影现象，补偿了缩短背光单元各区块工作时间所造成的辉度下降，并实现节能的效果。

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 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， 快门眼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， 造成左眼快门目艮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。 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 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 当前帧信号驱动下完全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。
其中， 所述背光单元的各区块的工作时间相等。
其中， 对于所述背光单元的各区块所对应液晶内的各像素， 分别改变 各像素的穿透率为1^1¾51 = 1^1¾51,(^1^ 1^, 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，。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。
其中， 在改变各像素的穿透率的基础上， 根据下述公式计算所述背光 单元的各区块驱动电流的补偿值：
各区块所对应液晶的目标辉度 = TMaxx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。
本发明的快门眼镜式 3D显示器的工作方法减轻了左右眼串扰造成的 残影现象， 补偿了缩短背光单元各区块工作时间所造成的辉度下降， 并实 现节能的效果。 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显示器的工作方法一较佳实施例的时序 示意图。 具体实施方式
参见图 2, 为本发明快门眼镜式 3D显示器的工作方法一较佳实施例 的时序示意图。
本发明的快门眼镜式 3D显示器的工作方法的主要过程与现有快门眼 镜式 3D显示器相同， 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。
如图 2所示， 在当前帧信号 （T1左眼信号时间或 T2右眼信号时间） 期间， 背光单元的各区块（S1,S2,S3,S4,S5 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完全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。 也就是说， 控制背光单元各 区块的 LED 开启时间为液晶反应后才开启， 各区块的工作时间必须要是 在液晶完全反应完后的时间到各区块所对应液晶被下一个帧信号 (左目艮换右 目艮信号)充电前。 在此较佳实施例中， 背光单元的各区块的工作时间可设置 为相等。 为减轻左右眼串扰造成的残影现象， 本发明缩短了 BLU各区块 LED的工作 （ duty ) 时间。
同时， 由于背光单元的各区块开启时间缩短， 造成整体辉度下降， 因 此必须设法增强液晶面板上图像信号的辉度。
因此， 本发明进一步釆取如下措施， 对于所述背光单元的各区块所对 应液晶 内 的各像素 ， 分别 改变各像素的 穿透率为 Tm,pixel = Tm,pixel,。xTMax/TM, 其中， Max表示所述液晶面板的最大信号灰度， 1 ^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,pixei,0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。
具体来说， 例如， 以 8bit色阶的液晶面板为例， 其最大灰度为 255 , 4叚设 S1区块所对应液晶上的原始最大信号灰度为 N, S2区块所对应液晶上 的原始最大信号灰度为 M, 此时， S1 区块所对应液晶除最大灰度信号 N的 像素 （pixel ) 的穿透率放大为 T255外， 此一区块内其余像素的穿透率依 T255/ 1^的倍率放大其穿透率。 同理， S2 区块除最大灰度信号 Μ 的像素的 穿透率放大为 τ255外， 此一区块内其余像素穿透率依 τ255/ ΤΜ的倍率放大其 穿透率。 通过放大液晶的穿透率， 可以相对增加液晶面板的辉度。
4叚如 Τ255>ΤΜ>ΤΝ, 则 SI区块所对应液晶最大信号灰度变成 255后液晶 穿透率放大 T255/TN, S2区块所对应液晶最大信号灰度变成 255后穿透率放 大 T255/TM, T255/TM <T255/Tn, 通过改变液晶灰度所带来的 S2区块信号放大 倍率小于 S1 , 因此， 为保持液晶面板的最大辉度相对稳定， 必须增加相应 背光单元区块的辉度， 相对的 S2区块 LED电流放大倍率 TM/T255就必须大于 S1 区块 LED电流放大倍率 TN/ T255。 在改变各像素的穿透率的基础上， 可 以根据下述公式计算所述背光单元的各区块驱动电流的补偿值：
各区块所对应液晶的目标辉度 = TMaxx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。 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=各区块 (81,82,83,84,85)对应液晶的30最大辉度=最大穿透率(以 8 1^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。 本发明缩短各区块 LED开起 duty时间所造成的辉度下降， 可以通过各区块计算最大信号的放大倍率， 对个别区块的 LED电流放大信 号作补偿， 以达到节能的目的。
本发明通过控制 S1,S2,S3,S4,S5 各区块 LED电流 power、 duty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。 此一作法有一个好处， 由于 duty时间各区块都相同， 但各区块当下最大信 号都由原区块内最大灰度信号 n、 穿透率 ！ 放大到灰度信号 255、 穿透率 T255, 穿透率放大了 Τ255/Τη, 因此相对应各区块因工作时间缩小减少串扰现 象所需要得各区块驱动电流放大值可以不同， 可以实现省能的目的。
综上所述， 本发明的快门眼镜式 3D显示器的工作方法减轻了左右眼 串扰造成的残影现象， 补偿了缩短背光单元各区块工作时间所造成的辉度 下降， 并实现节能的效果。
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完全反应的 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。
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， 所 述背光单元的各区块的工作时间相等。
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， 分别改变各像素的穿透 率为^，^^ !^^，^!^ ^, 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,。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。
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， 在 改变各像素的穿透率的基础上， 根据下述公式计算所述背光单元的各区块 驱动电流的补偿值：
各区块所对应液晶的目标辉度 = TMaxx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。
PCT/CN2011/083000 2011-11-16 2011-11-26 快门眼镜式3d显示器的工作方法 Ceased WO2013071640A1 (zh)

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