WO2014000323A1 - 侧入式背光模组及其扫描方法 - Google Patents

侧入式背光模组及其扫描方法 Download PDF

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Publication number
WO2014000323A1
WO2014000323A1 PCT/CN2012/078525 CN2012078525W WO2014000323A1 WO 2014000323 A1 WO2014000323 A1 WO 2014000323A1 CN 2012078525 W CN2012078525 W CN 2012078525W WO 2014000323 A1 WO2014000323 A1 WO 2014000323A1
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Prior art keywords
lcd panel
backlight
backlight module
partitions
partition
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PCT/CN2012/078525
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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 US13/583,226 priority Critical patent/US8860655B2/en
Publication of WO2014000323A1 publication Critical patent/WO2014000323A1/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
    • 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
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133601—Illuminating devices for spatial active dimming

Definitions

  • the present invention relates to liquid crystal display technology, and more particularly to a side-lit backlight module and a scanning 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 light entering 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 using a zone scan.
  • the corresponding backlight partition is lit, and the remaining backlight partitions are turned off;
  • the light leakage of the backlight partition corresponding to the left eye signal is irradiated to the backlight partition corresponding to the right eye signal
  • the left eye image and the right eye image are simultaneously generated in the eye, and crosstalk is generated.
  • the left eye signal is called an error signal (also called an interference signal).
  • 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 asymmetrical.
  • the characteristics are serious above and slightly below; crosstalk also exhibits left and right asymmetry. This is because of the influence of light entering the short side, the farther the light path is, the more serious the light leakage is.
  • 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.
  • Step a the first to third display partitions load the current frame left eye signal, and the fourth display partition is loaded before a frame of the right eye signal, the first backlight partition 41 is illuminated to illuminate the first display partition, because the light leakage of the first backlight partition 41 may illuminate the fourth display partition, and the fourth display partition is loaded with the previous frame of the right eye.
  • the signal is an error signal of crosstalk of the left eye signal of the current frame loaded with the first display partition.
  • step b The fourth display partition loads the current frame left eye signal. At this time, the entire left eye signal is loaded on the entire liquid crystal panel 40, and the second backlight partition 42 is lit to illuminate the second display partition. At this time, the second backlight partition 42 does not leak light.
  • Step c the first display partition loads one frame of the right eye signal, and the second to fourth display partitions load the current frame The 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 an error signal of the left eye signal crosstalk of the current frame loaded with the third display partition. Since the first display partition and the third display partition are separated by a display partition, the distance is relatively close, and the crosstalk is severe; the step d, the first and second display partitions are loaded with the next frame of the right eye signal, and the third and fourth displays are displayed.
  • the partition loads the current frame left eye signal, and the fourth backlight partition 44 lights up to illuminate the fourth display partition, and the next frame of the right eye signal loaded by the first and second display partitions is the current frame loaded with the fourth display partition.
  • the error signal of the crosstalk of the left eye signal because the first and second display partitions are separated from the fourth display partition by a display partition, the distance is relatively close, and the crosstalk is serious at this time.
  • the right eye signal previously 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.
  • the existing side-entry backlight partition is an even partition, when the error signal appears, the influence on the top to bottom is different.
  • the backlight partition lighting time is closer to the upper error signal, and the crosstalk above the liquid crystal panel 40 is relatively higher.
  • the liquid crystal panel 40 is asymmetrical in crosstalk. If the liquid crystal panel signal is directly adjusted so that the backlight partition is lit at the center of the liquid crystal panel signal, although the vertical crosstalk of the liquid crystal panel 40 can be made close to symmetry, since the backlight partition is even, the image quality at the center position is sacrificed, and the crosstalk becomes large. Summary of the invention
  • the object of the present invention is to solve the shortcomings of the existing even-numbered partition-side backlight module: (1)
  • the crosstalk between the display and the display is asymmetric; (2) If the upper and lower sides are close to symmetry, the crosstalk at the center position will be improved.
  • the present invention provides a side-entry backlight module, comprising: dividing into 2n+1 backlight partitions that are continuously and evenly arranged, wherein n is a natural number greater than or equal to 1, and the 2n+l backlight partitions It can be turned on or off separately by controlling the timing;
  • the LCD panel is divided into 2n+l display partitions to control the timing of the LCD panel signals, and the LCD panel signals are The frames are successively loaded onto the liquid crystal panel one by one; the timing of the 2n+l backlight partitions is controlled according to a predetermined visual effect to turn on or off the backlight partition, and the timing relationship between the backlight partition and the liquid crystal panel signals is controlled when the liquid crystal panel is When the signal of the loaded liquid crystal panel is a complete frame, the n+1th backlight partition located in the middle position of the side-entry backlight module just lights up.
  • the side-lit backlight module has a single short-side light input.
  • the side-lit backlight module has double short-edge light.
  • n is equal to 1.
  • the present invention also provides a side-entry backlight module, which is divided into 2n+1 backlight partitions which are continuously and evenly arranged, wherein n is a natural number greater than or equal to 1, and the 2n+l backlight partitions It can be turned on or off separately by controlling the timing;
  • the LCD panel is divided into 2n+l display partitions to control the timing of the LCD panel signals, and the LCD panel signals are The frames are successively loaded onto the liquid crystal panel one by one; the timing of the 2n+l backlight partitions is controlled according to a predetermined visual effect to turn on or off the backlight partition, and the timing relationship between the backlight partition and the liquid crystal panel signals is controlled when the liquid crystal panel is When the signal of the loaded liquid crystal panel is a complete frame, the n+1th backlight partition located at the middle position of the side-entry backlight module just lights up;
  • the side-entry backlight module is a single short-side light
  • n is equal to 1.
  • the invention also provides a scanning method for a side-lit backlight module, comprising:
  • Step 1 The side-in backlight module is evenly divided into 2n+l backlight partitions, where n is a natural number greater than or equal to 1;
  • Step 2 The liquid crystal panel is divided into 2n+1 display partitions, and the timing of the liquid crystal panel signals is controlled, and the liquid crystal panel signals are continuously loaded onto the liquid crystal panel one by one by the display partitions;
  • Step 3 controlling the timing of the 2n+1 backlight partitions according to a predetermined visual effect to turn on or off the backlight partition, and controlling a timing relationship between the backlight partition and the liquid crystal panel signal is when the liquid crystal panel signal loaded on the liquid crystal panel is complete
  • the n+1th backlight partition located in the middle of the side-lit backlight module just lights up.
  • the side-lit backlight module has a single short-side light input.
  • the side-lit backlight module has double short-edge light.
  • n is equal to 1.
  • the side-entry backlight module of the invention can make the crosstalk of the display screen up and down to be symmetrical, while keeping the crosstalk of the center position to the minimum, and comprehensively improving the quality of the 3D display.
  • the scanning method of the side-lit backlight module of the present invention can make the vertical crosstalk of the display screen symmetrical, while keeping the crosstalk at the center position to the minimum, and comprehensively improving the quality of the 3D display.
  • 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
  • Figure 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. 5 is a schematic diagram showing the timing relationship between a backlight partition and a liquid crystal panel signal according to a preferred embodiment of the edge-lit backlight module of the present invention
  • FIG. 6 is a flow chart of a scanning method of the side-lit backlight module of the present invention. detailed description
  • FIG. 5 is a schematic diagram showing the timing relationship between a backlight partition and a liquid crystal panel signal according to a preferred embodiment of the edge-lit backlight module of the present invention.
  • the edge-lit backlight module of the preferred embodiment includes: three backlight partitions divided into consecutive hooks, a first backlight partition 51, a second backlight partition 52, and a third backlight partition 53, and three backlight partitions can be controlled.
  • the timings are respectively turned on or off, and are used to correspondingly illuminate the three display partitions corresponding to the liquid crystal panel 50, the first display partition, the second display partition, and the third display partition.
  • the timing of the liquid crystal panel signals (including the left-eye signal and the right-eye signal) is controlled according to the existing 3D liquid crystal television, and the liquid crystal panel signals are successively displayed one by one.
  • Loading onto the liquid crystal panel, controlling the timing of the three backlight partitions according to a predetermined visual effect to turn on or off the backlight partition, and controlling the timing relationship between the backlight partition and the liquid crystal panel signal is when the liquid crystal panel signal loaded on the liquid crystal panel is a complete one Frame time
  • the second backlight partition 52 at the intermediate position of the side-entry backlight module is just lit. Referring to FIG.
  • Step A The first to second display partitions load the current frame left eye signal, the third display partition loads the previous frame right eye signal, and the first backlight partition 51 lights up to illuminate the first display.
  • the partitioning because the light leakage of the first backlight partition 51 may illuminate the third display partition, the right frame signal of the previous frame loaded by the third display partition is an error signal of the left eye signal crosstalk of the current frame loaded with the first display partition.
  • Step B the third display partition loads the current frame left eye signal, and the entire liquid crystal panel 50 is loaded with the complete left eye signal at the center position.
  • the second backlight partition 52 is illuminated to illuminate the second display partition.
  • Step c the first display partition loads one frame of the right eye signal, the second to third display partitions load the current frame left eye signal, and the third backlight partition 53 points To illuminate the third display partition, the next frame of the right eye signal loaded by the first display partition is an error signal of the left eye signal crosstalk of the current frame loaded with the third display partition, and the first display partition and the third display at this time
  • the partitions are separated by a display partition, which is the same as the interval in step A, that is, the upper and lower spacing is the same, and the crosstalk generated is also equivalent.
  • the side-entry backlight module of the present invention is an odd-numbered partitioned side-lit backlight, which is divided into three zones for scanning, and the interference of the upper and lower error signals is the same, which can achieve the same vertical and horizontal crosstalk while maintaining the central crosstalk to a minimum.
  • the side-entry backlight module can be a single short-side light input in FIG. 5 or a double short-side light input.
  • FIG. 6 is a flowchart of a scanning method of a side-lit backlight module of the present invention.
  • the method can be implemented based on the side-entry backlight module of the present invention.
  • the scanning method of the side-lit backlight module includes:
  • Step 1 The side-in backlight module is evenly divided into 2n+l backlight partitions, where n is a natural number greater than or equal to 1;
  • Step 2 The liquid crystal panel is divided into 2n+1 display partitions, and the timing of the liquid crystal panel signals is controlled, and the liquid crystal panel signals are continuously loaded onto the liquid crystal panel one by one by the display partitions;
  • Step 3 controlling the timing of the 2n+1 backlight partitions according to a predetermined visual effect to turn on or off the backlight partition, and controlling a timing relationship between the backlight partition and the liquid crystal panel signal is when the liquid crystal panel signal loaded on the liquid crystal panel is complete At one frame, the n+1th backlight partition located in the middle of the side-lit backlight module just lights up.
  • the side-entry backlight module can be a single short-side light input or a double short-edge light input. Where n can be equal to 1.
  • the side-lit backlight module of the present invention and the scanning method thereof solve the existing even number of points
  • the shortcomings of the area backlight module are proposed to solve the problem of the existing even-numbered partition backlight module by using odd-numbered partitions in the side-entry scanning backlight.
  • the present invention can reduce the maximum crosstalk value (when the backlight drive duty (duty) is limited to the same).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
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Description

侧入式背光模组及其扫描方法 技术领域
本发明涉及液晶显示技术， 尤其涉及一种侧入式背光模组及其扫描方 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 晶面板上釆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， 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 以左眼信号为例说明了通过液晶 面板 40及背光模组显示液晶面板信号时的连续步骤： 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眼信号之间的串扰， 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。 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， 本发明的目的在于解决现有偶数分区侧入式背光模组的缺点： (1)显示屏上下串扰非对称； （2)若要使上下接近对称， 会提高中心位置的串 扰。
为实现上述目的， 本发明提供了一种侧入式背光模组， 包括： 分成连 续均匀排列的 2n+l 个背光分区， 其中， n为大于等于 1 的自然数， 所述 2n+l个背光分区可以通过控制时序来分别点亮或关闭； 使用该侧入式背光 模组扫描对应的液晶面板时： 将液晶面板对应分成 2n+l 个显示分区， 控 制液晶面板信号的时序， 将液晶面板信号逐帧逐个显示分区连续加载至液 晶面板上； 按照预定视觉效果控制所述 2n+l 个背光分区的时序来点亮或 关闭背光分区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面 板上加载的液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置 的第 n+1个背光分区恰好点亮。
其中， 该侧入式背光模组为单短边入光。
其中， 该侧入式背光模组为双短边入光。
其中， n等于 1。
本发明还提供一种侧入式背光模组， 该侧入式背光模组分成连续均匀 排列的 2n+l个背光分区， 其中， n为大于等于 1的自然数， 所述 2n+l个 背光分区可以通过控制时序来分别点亮或关闭； 使用该侧入式背光模组扫 描对应的液晶面板时： 将液晶面板对应分成 2n+l 个显示分区， 控制液晶 面板信号的时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板 上； 按照预定视觉效果控制所述 2n+l 个背光分区的时序来点亮或关闭背 光分区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面板上加 载的液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置的第 n+1个背光分区恰好点亮；
其中， 该侧入式背光模组为单短边入光；
其中， n等于 1。
本发明还提供一种侧入式背光模组的扫描方法， 包括：
步骤 1、 将该侧入式背光模组顺序均匀分成 2n+l个背光分区， 其中， n为大于等于 1的自然数；
步骤 2、 将液晶面板对应分成 2n+l个显示分区， 控制液晶面板信号的 时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板上；
步骤 3、 按照预定视觉效果控制所述 2n+l个背光分区的时序来点亮或 关闭背光分区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面 板上加载的液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置 的第 n+1个背光分区恰好点亮。 其中， 该侧入式背光模组为单短边入光。
其中， 该侧入式背光模组为双短边入光。
其中， n等于 1。
本发明的侧入式背光模组可使显示屏上下串扰达到对称， 同时保持中 心位置串扰为最小， 全面性提升 3D显示的品质。 本发明的侧入式背光模 组的扫描方法可使显示屏上下串扰达到对称， 同时保持中心位置串扰为最 小， 全面性提升 3D显示的品质。 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 5 为本发明侧入式背光模组一较佳实施例的背光分区和液晶面板信 号的时序关系示意图；
图 6为本发明侧入式背光模组的扫描方法的流程图。 具体实施方式
参见图 5其为本发明侧入式背光模组一较佳实施例的背光分区和液晶 面板信号的时序关系示意图。 该较佳实施例的侧入式背光模组包括： 分成 连续均勾排列的 3 个背光分区， 第一背光分区 51、 第二背光分区 52、 第 三背光分区 53 , 3 个背光分区可以通过控制时序来分别点亮或关闭， 用于 对应照亮液晶面板 50对应分成的 3 个显示分区， 第一显示分区、 第二显 示分区、 第三显示分区。
使用该侧入式背光模组扫描对应的液晶面板 50时， 参照现有 3D液晶 电视， 控制液晶面板信号 （包括左目艮信号和右目艮信号） 的时序， 将液晶面 板信号逐帧逐个显示分区连续加载至液晶面板上， 按照预定视觉效果控制 3 个背光分区的时序来点亮或关闭背光分区， 控制背光分区和液晶面板信 号的时序关系为当所述液晶面板上加载的液晶面板信号为完整一帧时， 位 于该侧入式背光模组中间位置的第二背光分区 52恰好点亮。 参照图 5 具 体时序说明如下： 步骤 A、 第一至第二显示分区加载当前帧左眼信号， 第 三显示分区加载前一帧右眼信号， 第一背光分区 51 点亮以照亮第一显示 分区， 由于第一背光分区 51 的漏光可能照亮第三显示分区， 此时第三显 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， 此时第一显示分区与第三显示分区之间相隔一个显示分 区； 步骤 B、 第三显示分区加载当前帧左眼信号， 此时整个液晶面板 50 上加载了完整的左眼信号， 在中心位置的第二背光分区 52 点亮以照亮第 二显示分区， 此时第二背光分区 52 的漏光不会引起左右眼信号之间的串 扰， 影像品质最好， 也就是说在中心位置可以保持串扰最小； 步骤 c、 第 一显示分区加载后一帧右眼信号， 第二至第三显示分区加载当前帧左眼信 号， 第三背光分区 53 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， 此时第一显示分区与第三显示分区之间相隔一个显示分区， 与步骤 A 中的间隔相同， 也就是上下间距相同， 产生的串扰也相当。 整个 3D显示 过程中， 液晶面板 50 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。 本发明 的侧入式背光模组为一个奇数分区的侧入式背光， 分成 3 区做扫描， 上下 错误信号的干扰相同， 可实现上下串扰一致， 同时维持中心串扰为最小。 该侧入式背光模组可以为图 5中的单短边入光， 也可以为双短边入光。
参见图 6, 其为本发明侧入式背光模组的扫描方法的流程图。 该方法 可基于本发明的侧入式背光模组来实施。 该侧入式背光模组的扫描方法包 括：
步骤 1、 将该侧入式背光模组顺序均匀分成 2n+l个背光分区， 其中， n为大于等于 1的自然数；
步骤 2、 将液晶面板对应分成 2n+l个显示分区， 控制液晶面板信号的 时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板上；
步骤 3、 按照预定视觉效果控制所述 2n+l个背光分区的时序来点亮或 关闭背光分区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面 板上加载的液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置 的第 n+1个背光分区恰好点亮。
其中， 该侧入式背光模组可以为单短边入光， 也可以为双短边入光。 其中， n可以等于 1。
综上所述， 本发明的侧入式背光模组及其扫描方法解决了现有偶数分 区背光模组的缺点， 提出了在侧入式扫描背光中利用奇数分区来解决现有 偶数分区背光模组的问题。 而且由于背光占空比 （ duty ) 限制是扫描背 光设计时影响成本最重要的考量， 本发明可以降低最大串扰值 (当背光驱动 占空比 （duty ) 限制为相同时)。
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、 一种侧入式背光模组， 该侧入式背光模组分成连续均匀排列的 2n+l个背光分区， 其中， n为大于等于 1 的自然数， 所述 2n+l个背光分 区可以通过控制时序来分别点亮或关闭； 使用该侧入式背光模组扫描对应 的液晶面板时： 将液晶面板对应分成 2n+l 个显示分区， 控制液晶面板信 号的时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板上； 按 照预定视觉效果控制所述 2n+l 个背光分区的时序来点亮或关闭背光分 区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面板上加载的 液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置的第 n+1 个 背光分区恰好点亮。
2、 如权利要求 1 所述的侧入式背光模组， 其中， 该侧入式背光模组 为单短边入光。
3、 如权利要求 1 所述的侧入式背光模组， 其中， 该侧入式背光模组 为双短边入光。
4、 如权利要求 1所述的侧入式背光模组， 其中， n等于 1。
5、 一种侧入式背光模组， 该侧入式背光模组分成连续均匀排列的 2n+l个背光分区， 其中， n为大于等于 1 的自然数， 所述 2n+l个背光分 区可以通过控制时序来分别点亮或关闭； 使用该侧入式背光模组扫描对应 的液晶面板时： 将液晶面板对应分成 2n+l 个显示分区， 控制液晶面板信 号的时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板上； 按 照预定视觉效果控制所述 2n+l 个背光分区的时序来点亮或关闭背光分 区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面板上加载的 液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置的第 n+1 个 背光分区恰好点亮；
其中， 该侧入式背光模组为单短边入光；
其中， n等于 1。
6、 一种侧入式背光模组的扫描方法， 包括：
步骤 1、 将该侧入式背光模组顺序均匀分成 2n+l个背光分区， 其中， n为大于等于 1的自然数；
步骤 2、 将液晶面板对应分成 2n+l个显示分区， 控制液晶面板信号的 时序， 将液晶面板信号逐帧逐个显示分区连续加载至液晶面板上；
步骤 3、 按照预定视觉效果控制所述 2n+l个背光分区的时序来点亮或 关闭背光分区， 控制背光分区和液晶面板信号的时序关系为当所述液晶面 板上加载的液晶面板信号为完整一帧时， 位于该侧入式背光模组中间位置 的第 n+1个背光分区恰好点亮。
7、 如权利要求 6 所述的侧入式背光模组的扫描方法， 其中， 该侧入 式背光模组为单短边入光。
8、 如权利要求 6 所述的侧入式背光模组的扫描方法， 其中， 该侧入 式背光模组为双短边入光。
9、 如权利要求 6 所述的侧入式背光模组的扫描方法， 其中， n等于
1„
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