WO2014015535A1 - 具有不均匀大小背光分区的侧入式背光模组及其设计方法 - Google Patents

具有不均匀大小背光分区的侧入式背光模组及其设计方法 Download PDF

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Publication number
WO2014015535A1
WO2014015535A1 PCT/CN2012/079632 CN2012079632W WO2014015535A1 WO 2014015535 A1 WO2014015535 A1 WO 2014015535A1 CN 2012079632 W CN2012079632 W CN 2012079632W WO 2014015535 A1 WO2014015535 A1 WO 2014015535A1
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Prior art keywords
backlight
partition
partitions
edge
module
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Ceased
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PCT/CN2012/079632
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English (en)
French (fr)
Inventor
张光耀
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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 US13/698,039 priority Critical patent/US9684121B2/en
Priority to DE112012006635.9T priority patent/DE112012006635B4/de
Publication of WO2014015535A1 publication Critical patent/WO2014015535A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays
    • 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
    • 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
    • G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. three-dimensional [3D] slide viewers
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines

Definitions

  • the present invention relates to liquid crystal display technology, and in particular to a side-lit backlight module having a non-height-sized backlight partition and a design method thereof. Background technique
  • 3D LCD TVs there is a kind of shutter glass 3D display technology is the most commonly used technology at present. It uses the backlight partition to flash, separately display the signals of the left and right eyes, and then with the synchronized blinking glasses, you can see the left and right eyes. Different images.
  • the shutter type 3D display technology utilizes image processing technology to make the human eye feel the general visual effect like a stereoscopic image, and mainly includes: alternately outputting left and right eye image frame signals to the liquid crystal panel, respectively driving the liquid crystal panel to form a left,
  • the image of the right eye combined with the illumination of the scanning backlight module (scanning BLU) and the timing control of the shutter glass, causes the left and right eye signals to stimulate the left and right eyes respectively, thereby making the 3D image feelable.
  • the liquid crystal 3D display has a disadvantage: Since the liquid crystal panel itself does not emit light, it is necessary to use the backlight as a light source, and the backlight partition cannot be made too fine due to cost factors.
  • Fig. 1 it is a schematic diagram of the illumination and light leakage of the existing side-entry LED backlight.
  • the side-in LED backlight is configured by arranging the LED die on the peripheral edge of the liquid crystal panel, and then using the light guide plate to illuminate the LED backlight partition, and transmitting the light emitted from the edge of the liquid crystal panel to the center of the liquid crystal panel through the light guide plate. Go, so that there is enough backlight in the whole, which allows the LCD panel to display the picture.
  • LED backlights There are two advantages of side-lit LED backlights: one is that fewer LEDs can be used to save cost; the other is to create a slimmer body, so that LED modules are not required behind the LED TV LCD panel. , but placed on the side, can reduce the overall thickness of the LCD panel, the body can be very thin.
  • the backlight partition 11 in Fig. 1 is the short side of the right side, and the reason why the light leakage is asymmetric is that the farther the light path is, the more serious the light leakage is.
  • the backlight partition 11 When the backlight partition 11 is lit, the light will leak to the areas 12 and 13 on both sides, which will cause the left and right eye signals to interfere with each other, that is, the left eye sees the signal of the right eye (or the right eye sees the signal of the left eye), so that The image is blurred (because the two signals have a spatially misaligned distribution).
  • the evaluation standard of image blur is cross-talk, and the larger the value, the more serious the left and right eye image interference. Therefore, how to reduce crosstalk while maintaining product price competitiveness is an important issue at present.
  • the existing shutter type 3D display technology has crosstalk between the left eye signal and the right eye signal, which is determined by its technical characteristics.
  • the backlight module of the existing shutter type liquid crystal 3D display is divided into upper and lower backlight partitions according to the horizontal block, and the backlight partitions of the backlight module are sequentially controlled and operated according to the scanning method from top to bottom.
  • the image signal (left eye signal or right eye signal) sequentially supplies the required driving voltage for each column of the liquid crystal panel from top to bottom. After the pixel is charged by the driving voltage, the liquid crystal panel starts to react, due to pixel design and liquid crystal adhesion.
  • the hysteresis characteristic requires a liquid crystal reaction time to fully reach the desired steady state.
  • the image signal is displayed on the liquid crystal panel by partition scanning.
  • the corresponding backlight partition is lit, and the remaining backlight partitions are turned off;
  • the left-eye image is simultaneously generated in the eye.
  • crosstalk is generated.
  • FIG. 2A and FIG. 2B it is a schematic diagram of the backlight partitioning of the existing 46-inch single short-side side-entry LED TV.
  • the backlight module 20 is usually divided into an even number of four backlight partitions for lighting. After the edge backlight partition 21 is lit, light is leaked to the middle; when the middle backlight partition 22 is lit, light is leaked to both sides.
  • FIG. 3 it is a schematic diagram of the position of the string value of the nine points on the liquid crystal display.
  • the dimensions of the adjacent sides of the display screen 30 are respectively recorded as H and V, and the points 1 and 2 ⁇ 9 on the display screen 30 are distributed according to the relative positions indicated in Fig. 3, point 1, point 2 ⁇ 9
  • the position on the display is the position on the LCD panel.
  • the measurement results of nine point crosstalk values such as point 1, point 2 9 are as shown in Table 1 below, and the crosstalk is asymmetrically up and down.
  • the top is severe, the bottom is slight; crosstalk also exhibits left and right asymmetry, which is due to the influence of light entering the short side, the farther the light path, the more serious the light leakage.
  • the timing of the liquid crystal panel signal, the glasses signal, and the backlight scanning often cause crosstalk to be asymmetric.
  • the image quality of the left-eye signal or the right-eye signal in the middle of the liquid crystal panel is relatively best, and in the liquid crystal panel.
  • the upper image quality is asymmetrical.
  • Table A crosstalk up and down asymmetry can be explained by the timing relationship between the backlight partition and the liquid crystal panel signal. As shown in FIG.
  • the backlight module is divided into a first backlight partition 41, a second backlight partition 42, a third backlight partition 43, and a fourth backlight partition 44 from top to bottom, respectively for respectively illuminating the first display partition of the liquid crystal panel 40, and the second The display partition, the third display partition, and the fourth display partition.
  • Figure 4 shows the four steps of the liquid crystal panel 40 and the backlight module displaying the liquid crystal panel signals by taking the left eye signal as an example: Step a, the first to third display partitions load the current frame left eye signal, and the fourth display partition Loading the previous frame of the right eye signal, the first backlight partition 41 is lit to illuminate the first display partition, because the light leakage of the first backlight partition 41 may illuminate the fourth display partition, and the previous frame loaded by the fourth display partition at this time
  • the right eye signal is an error signal of the left eye signal crosstalk of the current frame loaded with the first display partition.
  • Step b The fourth display partition loads the current frame left eye signal, at which time the entire left eye signal is loaded on the entire liquid crystal panel 40, and the second backlight partition 42 is illuminated to illuminate the second display partition, and the second backlight partition 42 is Leakage does not cause crosstalk between the left and right witness signals, and the image quality is best;
  • Step c the first display partition loads one frame of the right eye signal, and the second to fourth display partitions load The first frame left eye signal, the third backlight partition 43 is lit to illuminate the third display partition, and the next frame right eye signal loaded by the first display partition is the crosstalk of the current frame left eye signal loaded with the third display partition.
  • step d the first and second display partitions are loaded with a frame of the right eye signal, the third sum
  • the fourth display partition loads the current frame left eye signal, and the fourth backlight partition 44 lights up to illuminate the fourth display partition.
  • the first frame and the right display signal loaded by the first and second display partitions are loaded with the fourth display partition.
  • the error signal of the left eye signal crosstalk of the current frame because the first and second display partitions are separated from the fourth display partition by one display partition, the distance is relatively close, and the crosstalk is serious at this time. When different backlight zones are lit, the resulting crosstalk is different.
  • the right eye signal (previous frame), the left eye signal (current frame), the right eye signal (the next frame), the left eye signal, and the right eye signal are repeatedly loaded on the liquid crystal panel 40. ..the process of. Since the existing side-entry backlight partition is an even partition, when the error signal appears, the influence on the top to bottom is different. In this example, the backlight partition lighting time is closer to the upper error signal, and the crosstalk above the liquid crystal panel 40 is relatively higher. However, the liquid crystal panel 40 has an asymmetrical crosstalk.
  • the present invention provides an edge-in backlight module having a non-uniform-sized backlight partition, and the relative size of each backlight partition of the side-entry backlight module having a non-uniformly-sized backlight partition satisfies the order of
  • the size of the backlight partition is relatively large, and the manner of sorting each backlight partition is: according to the predetermined liquid crystal panel signal and the backlight scanning timing, according to the uniform size backlight partition, the simulated backlight partition is illuminated to display the liquid crystal panel signal; Partitioning, analyzing the number of interference signal regions and interference signal distances that occur when each backlight partition is lit during the simulation, sorting the backlight partitions according to the degree of crosstalk caused by the interference signals when each backlight partition is lit, and having a backlight with a small crosstalk degree The partition is sorted first.
  • the largest size of each backlight partition is a third backlight partition
  • the second largest size for the second and fourth backlight partitions is the first and fifth backlight partitions.
  • the largest size of each backlight partition is a second backlight partition, and the second largest size is the first Backlight partitioning, the third largest is the third backlight partition, and the fourth largest is the fourth backlight partition.
  • the side-in backlight module is a single short-edge light-in backlight module.
  • the side-in type backlight module is a double short-edge light-in backlight module.
  • the present invention also provides an edge-in backlight module having a non-uniform-sized backlight partition.
  • the relative size of each backlight partition of the side-entry backlight module having a non-uniformly-sized backlight partition satisfies the sorted front backlight partition.
  • the size is relatively large, and the manner of sorting each backlight partition is: according to the predetermined liquid crystal panel signal and the backlight scanning timing, according to the uniform size backlight partition, the simulated backlight partition is illuminated to display the liquid crystal panel signal; according to the uniform size backlight partition, the analysis and simulation During the process, the number of interference signal regions and the interference signal distance appearing when each backlight partition is lit, the backlight partitions are sorted according to the degree of crosstalk caused by the interference signals when each backlight partition is lit, and the backlight partitions with less crosstalk are sorted before. ;
  • the largest size of each backlight partition is a third backlight partition, and the second largest size
  • the third largest size is the first and fifth backlight partitions
  • the side-in backlight module is a single short-edge light-in backlight module.
  • the invention also provides a design method of a side-lit backlight module with a non-height-sized backlight partition, which comprises: Step 1. According to the predetermined liquid crystal panel signal and the backlight scanning timing, according to the uniform size backlight partition, the process of simulating the backlight partition to illuminate to display the liquid crystal panel signal;
  • Step 2 According to the uniform backlight size partition, analyze the number of interference signal regions and the interference signal distance that occur when each backlight partition is lit during the simulation, and sort the backlight partitions according to the degree of crosstalk caused by the interference signals when each backlight partition is lit. , backlight partitions with a small degree of crosstalk are sorted first;
  • Step 3 Make the size of the backlight partition in the previous order relatively large.
  • the side-in backlight module is a single short-edge light-in backlight module.
  • the side-in type backlight module is a double short-edge light-in backlight module.
  • the side-entry backlight module with uneven size backlight partition and the design method thereof use the liquid crystal panel signal and the backlight scanning timing to determine the influence of each backlight partition on the crosstalk, change the relative size of the backlight partition to improve the crosstalk, and increase the display. quality.
  • FIG. 1 is a schematic diagram of light-emitting and light leakage of a conventional side-entry LED backlight
  • FIGS. 2A and 2B are schematic diagrams showing the backlight partitioning of a conventional 46-inch single short-side side-entry LED television
  • Figure 3 is a schematic diagram showing the position of the string value of the nine points on the display screen
  • FIG. 4 is a schematic diagram showing the timing relationship (left eye signal) of the backlight partition of the existing 46-inch single short-side side-entry LED TV and the signal of the liquid crystal panel;
  • FIG. 5A and FIG. 5B are schematic diagrams showing the scanning timing of the liquid crystal panel signal and the backlight when the number of backlight partitions is an odd number;
  • FIG. 6A and FIG. 6B are schematic diagrams showing the scanning timing of the liquid crystal panel signal and the backlight when the number of backlight partitions is even;
  • FIG. 7A is a schematic diagram of a relative size of each backlight partition when the backlight partition is odd, according to a preferred embodiment of the edge-lit backlight module having a non-uniformly-sized backlight partition;
  • FIG. 7B is a schematic diagram of a further preferred embodiment of a side-lit backlight module having a non-uniformly-sized backlight partition according to the present invention, and a relative size of each backlight partition when the backlight partition is even;
  • FIG. 8 is a flow chart of a method for designing a side-lit backlight module having a non-uniformly sized backlight partition according to the present invention. detailed description
  • the present invention utilizes a non-uniform backlight partition size to improve crosstalk and increase display quality. See picture
  • a flowchart of a method for designing a side-lit backlight module having a non-uniformly sized backlight partition of the present invention includes:
  • Step 1 According to the predetermined liquid crystal panel signal and the backlight scanning timing, according to the uniform size backlight partition, the process of simulating the backlight partition to illuminate to display the liquid crystal panel signal;
  • Step 2 According to the uniform backlight size partition, analyze the number of interference signal regions and the interference signal distance that occur when each backlight partition is lit during the simulation, and sort the backlight partitions according to the degree of crosstalk caused by the interference signals when each backlight partition is lit. , backlight partitions with a small degree of crosstalk are sorted first;
  • Step 3 Make the size of the backlight partition in the previous order relatively large.
  • the method can be applied to, for example, a single short-edge light-in backlight module and a double short-edge light-in backlight module, thereby designing a side-in backlight module having a non-uniformly-sized backlight partition.
  • FIGS. 5A and 5B are schematic diagrams showing the scanning timing of the liquid crystal panel signal and the backlight when the number of backlight partitions is an odd number. As shown in Fig. 5A, the number of partitions is an odd number. The specific example is five partitions.
  • the left and right eye LCD panel signals are arranged in sequence, and the range of left and right eye signals is indicated by parentheses. As shown in Figure 5A, when the simulation is performed according to step 1, when the backlight is lit, it can be selected to remain in the middle of the LCD panel signal to minimize crosstalk.
  • the liquid crystal panel signals are also sequentially divided into 2n+1 regions, and the liquid crystal panel signal in the middle of illumination is maintained, that is, the n+1th region of the liquid crystal panel signal is lit, so that the distances of the interference signals before and after the distance are equal and The farthest, which minimizes crosstalk.
  • the first, second, and third regions of the backlight are respectively lit, and the position of the backlight partition is marked with a diagonal grid, and the interference signal appears in the figure.
  • Different locations and different numbers that is, different levels of crosstalk, can cause crosstalk asymmetry.
  • the second and fourth backlight partition points have the same degree of crosstalk when illuminated, and the crosstalk level is the same when the first and fifth backlight partitions are lit. Therefore, according to the position where the interference signal appears, according to step 2, the backlight partitions are sorted according to the degree of the interference signal, and then the relative size of each backlight partition is modified according to step 3, thereby reducing the size of the backlight partition causing the large interference signal, thereby reducing The size of the interference is caused, so that the display quality is close to symmetry, and the side-entry backlight module with the uneven size backlight partition of the present invention is obtained.
  • FIG. 7A it is a schematic diagram of a relative size of each backlight partition when the backlight partition is odd, which is a preferred embodiment of the edge-lit backlight module with uneven size backlight partition.
  • the number of backlight partitions is five
  • the side-entry backlight module sequentially includes the first, second, and third
  • the fourth and fifth backlight partitions after changing the relative size of each partition according to the present invention, the size of each backlight partition is changed from small to large and symmetric from the edge to the middle, and the largest size of each backlight partition is the third backlight partition.
  • the second largest is the second and fourth backlight partitions
  • the third largest is the first and fifth backlight partitions.
  • the present invention uses only five backlight partitions as an example, for different partition numbers, the relative size can be determined by using the analysis in the same step, and then fine adjustment is performed according to the simulation.
  • the side-entry backlight module with the uneven-height backlight partition of the present invention, and displaying according to the predetermined liquid crystal panel signal and the backlight scanning timing, it is apparent that the crosstalk can be improved and the display quality can be improved.
  • FIGS. 6A and 6B are schematic diagrams showing the scanning timing of the liquid crystal panel signal and the backlight when the number of backlight partitions is even.
  • the number of partitions is even.
  • the specific example is four partitions.
  • the left and right eye LCD panel signals are arranged in sequence, and the range of left and right eye signals is indicated by brackets.
  • the number of partitions is even.
  • the position where the backlight partition is lit is marked with a diagonal grid. When the backlight is lit, it is selected to remain in the second area of the LCD panel signal to minimize the center crosstalk.
  • n is a natural number
  • the backlight when the backlight is lit, it can be selected to maintain the nth area of the liquid crystal panel signal, that is, as close as possible to the middle of the liquid crystal panel signal, so that the center crosstalk The smallest.
  • the position of the interference signal is different and the number is different, which causes crosstalk asymmetry.
  • Figure 6B shows four different display sequences (even partitions: 4 zones), which are the lighting conditions of the first, third, and fourth partitions of the backlight (the second partition has no interference signal, and the area size can be the largest).
  • each backlight partition is sorted according to the degree of interference signal when lighting, and then the size of each backlight partition is changed accordingly, thereby obtaining a relative backlight partition when the backlight partition is even as shown in FIG. 7B.
  • the number of backlight partitions is four, and when the side-in backlight module sequentially includes the first, second, third, and fourth backlight partitions, the largest of the backlight partitions is the second backlight partition, and the second size. The largest is the first backlight partition, the third largest is the third backlight partition, and the fourth largest is the fourth backlight partition.
  • the present invention has a side-lit backlight module with a non-height-sized backlight partition and a design method thereof, which utilizes the liquid crystal panel signal and backlight scanning timing to determine the influence of each backlight partition on crosstalk, change the relative size of the backlight partition, and improve Crosstalk, increasing display quality.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
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Description

具有不均匀大小背光分区的侧入式背光模组及其设计方法
技术领域
本发明涉及液晶显示技术， 尤其涉及一种具有不均勾大小背光分区的 侧入式背光模组及其设计方法。 背景技术
随著 LED 电视快速发展， 其即将进入另一个阶段—— 3D 液晶电 视。 3D 液晶电视中， 有一种快门式 （shutter glass ) 3D 显示技术是目前 最普遍使用的技术， 其利用背光分区闪烁， 分开显示左右眼的信号， 再搭 配同步闪烁的眼镜， 即可使左右眼看到不同的影像。 快门式 3D显示技术 利用影像处理技术， 使人眼感受如同立体影像一般的视觉效果， 主要包 括： 使左、 右眼图像帧 （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， 配合扫描式背光模组（scanning BLU ) 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。
然而， 液晶 3D 显示器有一个缺点： 由于液晶面板本身不发光， 必须 利用背光当作光源， 因成本因素， 背光分区不能做的太细致。 如图 1 所 示， 其为现有侧入式 LED 背光分区点亮及漏光示意图。 侧入式 LED 背 光， 是把 LED 晶粒配置在液晶面板的四周边缘， 再搭配导光板， 让 LED 背光分区点亮时， 把从液晶面板边缘发射的光通过导光板输送到液晶面板 中央的区域去， 这样整体就有足够的背光量， 可让液晶面板显示画面。 侧 入式 LED背光的好处有两个： 其一是可使用较少颗的 LED晶粒， 节省成 本； 其二就是能够打造比较轻薄的机身， 让 LED 电视液晶面板的后方不 需要配置 LED模块， 而是放置在侧边， 可减少液晶面板整体的厚度， 机 身能很薄。
图 1 中的背光分区 11 为右侧短边入光， 漏光左右非对称的原因在于 光路径愈远漏光愈严重。 当背光分区 11 点亮时， 光线会漏到其两侧的区 域 12 和 13 , 进而会造成左右眼信号互相干扰， 即左眼看到右眼的信号 (或右眼看到左眼的信号） ， 使影像模糊（因为两个信号有空间错位的分 布）。 影像模糊的评定标准为串扰（Cross-talk ) , 其值愈大表示左右眼影 像干扰愈严重。 因此如何降低串扰， 同时保持产品价格竟争力， 是目前重 要课题。 现有快门式 3D 显示技术在左眼信号和右眼信号之间存在串扰现象， 是由其技术特性所决定的。 现有快门式液晶 3D显示器的背光模组是按水 平区块上下作区隔成为偶数个背光分区， 按扫描方式由上往下依序控制背 光模组的各背光分区开启及工作时间。 图像信号 （左眼信号或右眼信号） 依序由上而下给与液晶面板各列所需驱动电压， 像素在收到驱动电压充电 后， 液晶面板才开始反应， 由于像素设计及液晶的粘滞特性， 需要一段液 晶反应时间才能完全达到所需稳定态。 由于液晶反应緩慢， 图像信号在液 晶面板上采用分区扫描的方式显示， 当扫描液晶面板上任一区图像信号 时， 对应的背光分区点亮， 其余背光分区关闭； 由于背光分区存在漏光， 因此当对应左眼信号的背光分区的漏光照射到对应右眼信号的背光分区时 (或对应右眼信号的背光分区的漏光照射到对应左眼信号的背光分区 时） ， 眼中就会同时产生左眼图像与右眼图像， 产生了串扰， 我们可以将 引起串扰的右眼信号或左眼信号称为错误信号 （也可称为干扰信号） 。
如图 2A及图 2B所示， 其为现有 46寸单短边侧入式 LED电视的背光 分区点亮情形示意图。 以现有 46寸单短边侧入式 LED电视为例， 其背光 模组 20通常分成偶数个如四个背光分区进行点亮。 边缘背光分区 21点亮 后， 向中间漏光； 中间背光分区 22点亮后， 会向其两侧漏光。
如图 3 所示， 其为量测液晶显示屏上九点的串 4尤值的位置示意图。 图 3 中， 显示屏 30相邻两侧边的尺寸分别记为 H和 V, 显示屏 30上的点 1、 点 2 ^ 9按图 3中标示的相对位置分布， 点 1、 点 2 ^ 9在显 示屏上的位置即为液晶面板上的位置。 通过对现有的 46寸单短边入光、 4 背光分区扫描的 LED 电视进行测量， 点 1、 点 2 9等九个点串扰值 测量结果如下面表一所示， 串扰呈现上下非对称的特点， 上方严重， 下方 轻微； 串扰还呈现左右非对称的特点， 这是因为单短边入光的影响， 光路 径愈远， 漏光愈严重。
、 九点串扰量测值 (46寸单短边入光， 4背光分区扫描)
Figure imgf000004_0001
由于背光分区的设计， 液晶面板信号、 眼镜信号、 背光扫描三者的时 序搭配， 常会造成串扰非对称的现象。 由表一的数据可以看出， 对于现有 的 46寸单短边侧入式 LED电视来说， 左眼信号或右眼信号在液晶面板中 部的图像质量相对来说最好， 并且在液晶面板上图像质量上下非对称。 表 一中串扰上下非对称可以用背光分区和液晶面板信号的时序关系做解释。 如图 4所示， 其为现有 46寸单短边侧入式 LED电视的背光分区和液 晶面板信号 （液晶面板上的左眼图像信号或右眼图像信号） 的时序关系 (左眼信号）示意图。 背光模组由上至下顺序分成第一背光分区 41、 第二 背光分区 42、 第三背光分区 43及第四背光分区 44, 分别用于对应照亮液 晶面板 40 的第一显示分区、 第二显示分区、 第三显示分区及第四显示分 区。 图 4 以左眼信号为例显示了液晶面板 40及背光模组显示液晶面板信 号时的连续四个操作步骤： 步骤 a、 第一至第三显示分区加载当前帧左眼 信号， 第四显示分区加载前一帧右眼信号， 第一背光分区 41 点亮以照亮 第一显示分区， 由于第一背光分区 41 的漏光可能照亮第四显示分区， 此 时第四显示分区加载的前一帧右眼信号为与第一显示分区加载的当前帧左 眼信号串扰的错误信号， 由于第一显示分区与第四显示分区之间相隔两个 显示分区， 距离较远， 此时串扰轻微； 步骤 b、 第四显示分区加载当前帧 左眼信号， 此时整个液晶面板 40 上加载了完整的左眼信号， 第二背光分 区 42点亮以照亮第二显示分区， 此时第二背光分区 42的漏光不会引起左 右目艮信号之间的串扰， 影像品质最好； 步骤 c、 第一显示分区加载后一帧 右眼信号， 第二至第四显示分区加载当前帧左眼信号， 第三背光分区 43 点亮以照亮第三显示分区， 此时第一显示分区加载的后一帧右眼信号为与 第三显示分区加载的当前帧左眼信号串扰的错误信号， 由于第一显示分区 与第三显示分区之间相隔一个显示分区， 距离较近， 此时串扰严重； 步骤 d、 第一和第二显示分区加载后一帧右眼信号， 第三和第四显示分区加载 当前帧左眼信号， 第四背光分区 44 点亮以照亮第四显示分区， 此时第一 和第二显示分区加载的后一帧右眼信号为与第四显示分区加载的当前帧左 眼信号串扰的错误信号， 由于第一和第二显示分区与第四显示分区之间间 隔一个显示分区， 距离较近， 此时串扰严重。 不同背光分区点亮时， 所造 成的串扰严重程度不同。 整个 3D显示过程中， 液晶面板 40上会重复加载 右眼信号 （前一帧） 、 左眼信号 （当前帧） 、 右眼信号 （后一帧） 、 左眼 信号、 右眼信号 ......的过程。 由于现有的侧入式背光分区为偶数分区， 当 错误信号出现时， 对上对下的影响不同， 在这个例子中， 背光分区点亮时 间较接近上方的错误信号， 液晶面板 40上方串扰较为严重， 液晶面板 40 上下串扰不对称。 若直接将液晶面板信号调整， 使背光分区点亮在液晶面 板信号的中心， 虽然可以使液晶面板 40 上下串扰接近对称， 但因为背光 分区为偶数， 会牺牲中心位置的影像品质， 串扰变大。 发明内容
因此， 本发明的目的在于利用不均匀背光分区大小来改善串扰， 增加 显 TF品质。
为实现上述目的， 本发明提供一种具有不均勾大小背光分区的侧入式 背光模组， 该具有不均匀大小背光分区的侧入式背光模组的各背光分区的 相对大小满足排序在前的背光分区的大小相对较大， 排序各背光分区的方 式为： 根据预定的液晶面板信号与背光扫描时序， 按照均匀大小背光分区 模拟背光分区点亮以显示液晶面板信号的过程； 按照均匀大小背光分区， 分析模拟过程中各背光分区点亮时出现的干扰信号区域数目及干扰信号距 离， 按照各背光分区点亮时干扰信号造成串扰的程度对各背光分区进行排 序， 具有较小串扰程度的背光分区排序在前。
其中， 当所述侧入式背光模组依序包括第一、 第二、 第三、 第四及第 五背光分区时， 各背光分区中大小最大的为第三背光分区， 大小第二大的 为第二和第四背光分区， 大小第三大的为第一和第五背光分区。
其中， 当所述侧入式背光模组依序包括第一、 第二、 第三及第四背光 分区时， 各背光分区中大小最大的为第二背光分区， 大小第二大的为第一 背光分区， 大小第三大的为第三背光分区， 大小第四大的为第四背光分 区。
其中， 所述侧入式背光模组为单短边入光背光模组。
其中， 所述侧入式背光模组为双短边入光背光模组。
本发明还提供一种具有不均勾大小背光分区的侧入式背光模组， 该具 有不均匀大小背光分区的侧入式背光模组的各背光分区的相对大小满足排 序在前的背光分区的大小相对较大， 排序各背光分区的方式为： 根据预定 的液晶面板信号与背光扫描时序， 按照均匀大小背光分区模拟背光分区点 亮以显示液晶面板信号的过程； 按照均匀大小背光分区， 分析模拟过程中 各背光分区点亮时出现的干扰信号区域数目及干扰信号距离， 按照各背光 分区点亮时干扰信号造成串扰的程度对各背光分区进行排序， 具有较小串 扰程度的背光分区排序在前；
其中， 当所述侧入式背光模组依序包括第一、 第二、 第三、 第四及第 五背光分区时， 各背光分区中大小最大的为第三背光分区， 大小第二大的 为第二和第四背光分区， 大小第三大的为第一和第五背光分区；
其中， 所述侧入式背光模组为单短边入光背光模组。
本发明还提供了一种具有不均勾大小背光分区的侧入式背光模组的设 计方法， 包括： 步骤 1、 根据预定的液晶面板信号与背光扫描时序， 按照均匀大小背 光分区， 模拟背光分区点亮以显示液晶面板信号的过程；
步骤 2、 按照均勾大小背光分区， 分析模拟过程中各背光分区点亮时 出现的干扰信号区域数目及干扰信号距离， 按照各背光分区点亮时干扰信 号造成串扰的程度对各背光分区进行排序， 具有较小串扰程度的背光分区 排序在前；
步骤 3、 使排序在前的背光分区的大小相对较大。
其中， 所述侧入式背光模组为单短边入光背光模组。
其中， 所述侧入式背光模组为双短边入光背光模组。
本发明的具有不均匀大小背光分区的侧入式背光模组及其设计方法， 利用液晶面板信号与背光扫描时序， 判断各个背光分区对串扰的影响， 改 变背光分区相对大小来改善串扰， 增加显示品质。 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 的技术方案及其他有益效果显而易见。
附图中，
图 1为现有侧入式 LED背光分区点亮及漏光示意图；
图 2A及图 2B为现有 46寸单短边侧入式 LED电视的背光分区点亮情 形示意图；
图 3为量测显示屏上九点的串 4尤值的位置示意图；
图 4为现有 46寸单短边侧入式 LED电视的背光分区和液晶面板信号 的时序关系 （左眼信号） 示意图；
图 5A及图 5B为当背光分区数为奇数时， 液晶面板信号与背光扫描时 序示意图；
图 6A及图 6B为当背光分区数为偶数时， 液晶面板信号与背光扫描时 序示意图；
图 7A 为本发明具有不均匀大小背光分区的侧入式背光模组一较佳实 施例， 当背光分区为奇数时各背光分区相对大小的示意图；
图 7B 为本发明具有不均匀大小背光分区的侧入式背光模组又一较佳 实施例， 当背光分区为偶数时各背光分区相对大小的示意图；
图 8 为本发明具有不均匀大小背光分区的侧入式背光模组的设计方法 的流程图。 具体实施方式
本发明利用不均匀背光分区大小来改善串扰， 增加显示品质。 参见图
8, 其为本发明具有不均匀大小背光分区的侧入式背光模组的设计方法的 流程图。 该设计方法包括：
步骤 1、 根据预定的液晶面板信号与背光扫描时序， 按照均匀大小背 光分区， 模拟背光分区点亮以显示液晶面板信号的过程；
步骤 2、 按照均勾大小背光分区， 分析模拟过程中各背光分区点亮时 出现的干扰信号区域数目及干扰信号距离， 按照各背光分区点亮时干扰信 号造成串扰的程度对各背光分区进行排序， 具有较小串扰程度的背光分区 排序在前；
步骤 3、 使排序在前的背光分区的大小相对较大。
可以将该方法应用于诸如单短边入光背光模组及双短边入光背光模组 等， 从而设计出具有不均匀大小背光分区的侧入式背光模组。
下面结合图 5A、 图 5B、 图 6A、 图 6B、 图 7A及图 7B来说明该设计 方法及应用该方法设计出的具有不均匀大小背光分区的侧入式背光模组。
图 5A及图 5B为当背光分区数为奇数时， 液晶面板信号与背光扫描时 序示意图。 如图 5A 所示， 分区数为奇数， 具体举例为五个分区， 左、 右 眼液晶面板信号依序排列， 左右眼信号的范围由括号标出。 如图 5A 所 示， 按照步骤 1 来模拟时， 背光点亮时， 可以选择维持在液晶面板信号中 间， 以使串扰最小， 对于 2n+l ( n为自然数）个背光分区组成的背光模组 来说， 液晶面板信号也相应分顺序为 2n+l 个区域， 维持点亮中间的液晶 面板信号也就是说点亮液晶面板信号的第 n+1 个区域， 这样距离前后的干 扰信号的距离相等且最远， 使得串扰最小。 如图 5B 所示， 在液晶面板信 号循环的过程中， 分别为背光第一、 第二、 第三区点亮情况， 背光分区点 亮的位置以斜线格标出， 图中可见干扰信号出现的位置不同、 数目不同， 也就是造成的串扰程度不同， 会造成串扰不对称。 第二和第四背光分区点 亮时串扰程度相同， 第一第五背光分区点亮时串扰程度相同。 因此本发明 依据干扰信号出现的位置， 按照步骤 2根据干扰信号的程度来排序各背光 分区， 再按照步骤 3修改各背光分区相对大小， 减小造成较大干扰信号背 光分区的大小， 进而减小了其造成干扰的大小， 从而使显示品质接近对 称， 获得了本发明的具有不均匀大小背光分区的侧入式背光模组。
如图 7A 所示， 其为本发明具有不均匀大小背光分区的侧入式背光模 组一较佳实施例， 当背光分区为奇数时各背光分区相对大小的示意图。 此 实施例中背光分区数为五， 侧入式背光模组依序包括第一、 第二、 第三、 第四及第五背光分区时， 按照本发明改变各分区相对大小后， 各背光分区 的大小从边缘到中间由小变大、 上下对称， 各背光分区中大小最大的为第 三背光分区， 大小第二大的为第二和第四背光分区， 大小第三大的为第一 和第五背光分区。 虽然本发明仅以五个背光分区作为举例， 但是对于不同 分区数， 可同样按步骤利用分析先决定相对大小， 再依照模拟， 做细部调 整。 采用本发明的具有不均勾大小背光分区的侧入式背光模组， 再根据预 定的液晶面板信号与背光扫描时序进行显示， 显然可以改善串扰， 增加显 示品质。
图 6A及图 6B为当背光分区数为偶数时， 液晶面板信号与背光扫描时 序示意图。 如图 6A 所示， 分区数为偶数， 具体举例为四个分区， 左、 右 眼液晶面板信号依序排列， 左右眼信号的范围由括号标出。 图 6A中 分区 数为偶数， 背光分区点亮的位置以斜线格标出， 背光点亮时， 选择维持在 液晶面板信号第二区， 以使中心串扰最小。 对于 2n ( n为自然数）个背光 分区组成的背光模组来说， 背光点亮时， 可以选择维持在液晶面板信号的 第 n个区域， 也就是尽量接近液晶面板信号的中间， 以使中心串扰最小。 如图 6B 所示， 在液晶面板信号循环的过程中， 干扰信号出现的位置不 同、 数目不同， 会造成串扰不对称。 图 6B显示了四种不同显示序列（偶数 分区： 4 区）， 分别为背光第一、 第三、 第四分区点亮情况 (第二分区没有 干扰信号， 区域尺寸可以最大)。 同样， 按照本发明前述的步骤， 对各背光 分区按照点亮时的干扰信号程度进行排序， 进而相应改变各背光分区大 小， 从而得到如图 7B 所示的当背光分区为偶数时各背光分区相对大小的 示意图。 此实施例中背光分区数为四， 侧入式背光模组依序包括第一、 第 二、 第三及第四背光分区时， 各背光分区中大小最大的为第二背光分区， 大小第二大的为第一背光分区， 大小第三大的为第三背光分区， 大小第四 大的为第四背光分区。
综上所述， 本发明具有不均勾大小背光分区的侧入式背光模组及其设 计方法利用液晶面板信号与背光扫描时序， 判断各个背光分区对串扰的影 响， 改变背光分区相对大小， 改善串扰， 增加显示品质。
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 都应属于本发明后附的权利要求的保护范围。

Claims

权 利 要 求
1、 一种具有不均匀大小背光分区的侧入式背光模组， 该具有不均匀 大小背光分区的侧入式背光模组的各背光分区的相对大小满足排序在前的 背光分区的大小相对较大， 排序各背光分区的方式为： 根据预定的液晶面 板信号与背光扫描时序， 按照均匀大小背光分区模拟背光分区点亮以显示 液晶面板信号的过程； 按照均勾大小背光分区， 分析模拟过程中各背光分 区点亮时出现的干扰信号区域数目及干扰信号距离， 按照各背光分区点亮 时干扰信号造成串扰的程度对各背光分区进行排序， 具有较小串扰程度的 背光分区排序在前。
2、 如权利要求 1 所述的具有不均匀大小背光分区的侧入式背光模 组， 其中， 当所述侧入式背光模组依序包括第一、 第二、 第三、 第四及第 五背光分区时， 各背光分区中大小最大的为第三背光分区， 大小第二大的 为第二和第四背光分区， 大小第三大的为第一和第五背光分区。
3、 如权利要求 1 所述的具有不均匀大小背光分区的侧入式背光模 组， 其中， 当所述侧入式背光模组依序包括第一、 第二、 第三及第四背光 分区时， 各背光分区中大小最大的为第二背光分区， 大小第二大的为第一 背光分区， 大小第三大的为第三背光分区， 大小第四大的为第四背光分 区。
4、 如权利要求 1 所述的具有不均匀大小背光分区的侧入式背光模 组， 其中， 所述侧入式背光模组为单短边入光背光模组。
5、 如权利要求 1 所述的具有不均匀大小背光分区的侧入式背光模 组， 其中， 所述侧入式背光模组为双短边入光背光模组。
6、 一种具有不均匀大小背光分区的侧入式背光模组， 该具有不均匀 大小背光分区的侧入式背光模组的各背光分区的相对大小满足排序在前的 背光分区的大小相对较大， 排序各背光分区的方式为： 根据预定的液晶面 板信号与背光扫描时序， 按照均匀大小背光分区模拟背光分区点亮以显示 液晶面板信号的过程； 按照均勾大小背光分区， 分析模拟过程中各背光分 区点亮时出现的干扰信号区域数目及干扰信号距离， 按照各背光分区点亮 时干扰信号造成串扰的程度对各背光分区进行排序， 具有较小串扰程度的 背光分区排序在前；
其中， 当所述侧入式背光模组依序包括第一、 第二、 第三、 第四及第 五背光分区时， 各背光分区中大小最大的为第三背光分区， 大小第二大的 为第二和第四背光分区， 大小第三大的为第一和第五背光分区；
其中， 所述侧入式背光模组为单短边入光背光模组。
7、 一种具有不均匀大小背光分区的侧入式背光模组的设计方法， 包 括：
步骤 1、 根据预定的液晶面板信号与背光扫描时序， 按照均匀大小背 光分区， 模拟背光分区点亮以显示液晶面板信号的过程；
步骤 2、 按照均勾大小背光分区， 分析模拟过程中各背光分区点亮时 出现的干扰信号区域数目及干扰信号距离， 按照各背光分区点亮时干扰信 号造成串扰的程度对各背光分区进行排序， 具有较小串扰程度的背光分区 排序在前；
步骤 3、 使排序在前的背光分区的大小相对较大。
8、 如权利要求 7 所述的具有不均匀大小背光分区的侧入式背光模组 的设计方法， 其中， 所述侧入式背光模组为单短边入光背光模组。
9、 如权利要求 7 所述的具有不均匀大小背光分区的侧入式背光模组 的设计方法， 其中， 所述侧入式背光模组为双短边入光背光模组。
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