CN104303223A - 超亮背光lcd视频显示器 - Google Patents

超亮背光lcd视频显示器 Download PDF

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CN104303223A
CN104303223A CN201380005018.4A CN201380005018A CN104303223A CN 104303223 A CN104303223 A CN 104303223A CN 201380005018 A CN201380005018 A CN 201380005018A CN 104303223 A CN104303223 A CN 104303223A
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light
video display
lcd
control circuit
light source
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K·K·李
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Wavien Inc
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    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种超亮背光LCD视频显示器包括外罩，所述外罩包含例如一个或多个LED之类的光源。准直透镜接收由所述光源生成的几乎所有的光，并且引导这样的光穿过偏振器。偏振器输出被发送到LCD面板，所述LCD面板具有被动态地控制成允许光穿过预定像素的像素阵列。LCD面板输出穿过形成视频图像屏幕的漫射器。

Description

超亮背光LCD视频显示器
相关申请的交叉引用
本申请要求2012年1月9日提交的美国临时申请号61/584,481的优先权。
背景技术
户外视频显示器通常使用LED，其以分辨率为代价提供亮度(brightness)。但是传统的户外LDC显示器通常不如所期望的那样明亮，其提供仅仅处于大约400到1200坎德拉每平方米(其也被称作“nits”)的范围内的辉度(luminance)。
因此将希望提供一种例如作为视频立方的显示器单元，其将提供更高的亮度但是仍然使用LED。
发明内容
一种超亮背光LCD视频显示器包括外罩，所述外罩包含例如一个或多个LED之类的光源。准直透镜接收由所述光源生成的几乎所有的光，并且引导这样的光穿过偏振器。偏振器输出被发送到LCD面板，所述LCD面板具有被动态地控制成允许光穿过预定像素的像素阵列。LCD面板输出穿过形成视频图像屏幕的漫射器。
可选的是，可以在视频显示器外罩内围绕LED放置再循环套环(recycling collar)以便捕获更多的光。或者可以围绕LED放置抛物面反射器以便捕获更多的光。如果期望的话，可以在光源与准直透镜之间放置附加的透镜。
在另一个实施例中，在准直透镜与屏幕之间提供具有反射内表面的光隧道。
可以在外罩内放置一个或多个光传感器，并且使用控制电路来调节图像颜色和均匀性，其中所述控制电路使用这样的光传感器以及外部校准传感器的输出。
特别在对于更大屏幕所需要的情况下可以使用多个光源。此外，可以层叠多个视频显示器以形成视频壁面。在任一种情况下，所述控制电路连同传感器一起被用来调节图像颜色和强度，从而使得屏幕显示是均匀的。
附图说明
图1是根据本发明的LCD背光系统的第一实施例的示意性表示；
图2是根据本发明的LCD背光系统的第二实施例的示意性表示；
图3是用在LCD背光系统中的光源的一个实施例的示意性表示；
图4是根据本发明的LCD背光系统的第三实施例的示意性表示；
图5是可以与先前的实施例一同使用的所述系统的修改的示意性表示；
图6是根据本发明的LCD背光系统的一部分的另一个实施例的示意性表示；
图7是根据本发明的显示器模型的透视图；
图8是利用多个图7的模块形成的视频壁面的透视图；
图9是用在本发明的系统中的控制模块的示意性表示；以及
图10是利用多个光源的LCD背光系统的示意性表示。
具体实施方式
图1示出了具有外罩12的视频显示器10的第一实施例。优选地是LED14的光源被固定在外罩12内的第一开放腔室15中，并且由电力供应装置(未示出)供电。从LED发出的光16被封闭腔室15的透镜18准直。经过准直的光20穿过可以是吸收性或反射性的偏振器22。在使用反射性偏振器时，未穿过偏振器22的光被反射回到LED并且将被再循环，从而增强系统的输出。
经过偏振的光随后穿过LCD面板24和第二偏振器26(分析器)，其将允许来自LCD面板24上的经过调制的像素的光穿过并且被看到。
来自第二偏振器26的输出将具有较窄的发散和非常窄的观看角度。为了产生更宽的观看角度，令光穿过漫射器28。屏幕的亮度将取决于光源的功率。在图1的实例中，透镜18、偏振器22和26、LCD面板24和漫射器28都被包含在外罩12内，并且通过气隙彼此间隔开。
LED在非常大的角度下发光，因此难以收集光输出。图2示出了一个替换实施例，其中视频显示器10a在外罩内的LED14与准直透镜18之间包含带有内部反射表面31的再循环套环30。在图2的实施例中，从LED14发出的低角度的光将被直接发射到透镜18，而发射角度高于预定角度的光束32则将从再循环套环内表面32朝向LED14反射回去。因此，所有的高角度光束32都将被再循环。
在大多数应用中，所述准直透镜、偏振器、LCD面板和屏幕是矩形的。因此，光离开视频显示器10、10a的孔径应当是矩形的，以便与屏幕匹配。
在图3的实施例中，取代具有处于外罩内部15之内的再循环套环30和收集所有的光的准直透镜18，抛物面反射器34围绕LED14以便收集高角度光束并且对其进行准直。较小的准直透镜36被布置在腔室12中并且沿着显示器的轴38居中，以便仅仅捕获并且准直小角度光束40。在被抛物面反射器34准直之后，更高角度光束32朝向偏振器22传递到透镜36的外部。图3中所示的配置提供了高输出，但是在由准直透镜进行准直之后具有更高发散。更高的发散将导致来自LCD显示器的较低对比率。
在图4的实施例中，视频显示器10b包括安放在LED14之上的提高系统效率的圆顶透镜42。可选的是，透镜44可以位于腔室12中，从而将来自圆顶的光高效地耦合到准直透镜18。
图5示出了包括光源14和屏幕50的显示器模块10c，其包括准直透镜、带有偏振器、漫射器、反射器的LCD等等。模块10c在外罩的内部还包括光传感器52和控制电路54。控制电路54包含关于光源的强度、各种颜色的强度以及屏幕处的光照的均匀性的信息，从而可以调节输入图像信号以便提供所期望的图像颜色和均匀性。
图6示出了LCD视频显示器的一个替换实施例的一部分。完全封闭在反射壁面62中的准直透镜18与偏振器22或LCD面板24之间的中空腔室60产生更高的照明均匀性。
图7示出了具有LCD和矩形屏幕54的LCD视频显示器10的透视图。
图8示出了由视频显示器10的2x2层叠配置形成的视频壁面64。
图9示出了包含连接到外部校准传感器模块70的控制电路54的视频显示器。所述控制电路接收来自外部传感器模块70和图5中所示的内部传感器52全部二者的输入信号。使用测试图像从而通过校准传感器模块70检测出强度、颜色和失真(如果存在的话)，并且调节参数被发送并且存储在控制电路54中。这一点在将多个单元放置在一起以作为视频壁面时特别重要。
图10示出了包含可以被用来照明更大的LCD面板的多个光源14的LCD视频显示器10d。举例来说，可以由单一LED光源为一台10"对角线显示器供电。一台60"对角线显示器优选地由按照3x3配置在内部腔室12内的间隔开的9个LED光源供电。替代单一准直透镜18，优选地对于每一个光源14使用单独的准直透镜18a、18b和18c。
由于每一个光源14将具有略微不同的强度和颜色，因此来自传感器的输出将被用来利用控制电路54进行调节。此外，如图9中所示，还可以使用校准传感器模块70，使得大屏幕尺寸将具有均匀的强度和颜色。在本实施例中还可以使用图6中所示的反射器腔室60和壁面62，其形成准直透镜18与屏幕之间的光隧道。
所述准直透镜可以是玻璃透镜、塑料透镜或Fresnel透镜。光源14虽然优选地是LED，但是替换地可以是电弧灯、微波灯或卤素灯。校准模块70包括数字摄影机和用于进行分析的计算机，所述计算机连接到控制电路54并且提供调节参数。所述调节参数被存储在控制电路存储器中。
前面的描述代表本发明的优选实施例。各种修改对于本领域技术人员将是显而易见的。所有这样的修改和变型应当落在如在所附权利要求书中阐述的本发明的范围之内。

Claims (10)

1.一种超亮背光LCD视频显示器，其包括：
具有包含光源的中空腔室的外罩；
包含在所述外罩中以便接收由所述光源生成的基本上所有的光的准直透镜；
以接收穿过所述准直透镜的基本上所有的光的方式耦合到所述准直透镜的偏振器；
以接收穿过所述偏振器的基本上所有的光的方式耦合到所述偏振器的LCD面板，所述LCD面板具有被动态地控制成允许光穿过预定像素的像素阵列；以及
以接收穿过所述LCD面板的基本上所有的光并且形成视频图像屏幕的方式耦合到所述LCD面板的漫射器。
2.权利要求1的视频显示器，其还包括围绕LED放置在视频显示器外罩内以便捕获更多的光的再循环套环。
3.权利要求1的视频显示器，其还包括能够围绕LED放置以便捕获更多的光的抛物面反射器。
4.权利要求1的视频显示器，其包括位于光源与准直透镜之间的附加透镜。
5.权利要求1的视频显示器，其还包括位于准直透镜与屏幕之间的具有反射内表面的光隧道。
6.权利要求1的视频显示器，其中，所述外罩包含一个或多个光传感器和控制电路，所述控制电路使用这样的光传感器以及外部校准传感器的输出来调节图像颜色和均匀性。
7.权利要求1的视频显示器，其中，所述外罩包含多个光源并且包括控制电路，所述控制电路使用内部和外部传感器来调节屏幕显示，从而使得图像颜色和强度是均匀的。
8.权利要求7的视频显示器，其包括对应于每一个光源的单独的准直透镜。
9.一种视频壁面，其包括多个层叠的如权利要求1所述的视频显示器。
10.如权利要求9所述的视频壁面，其还包括控制电路，所述控制电路使用内部和外部传感器来调节图像颜色和强度，从而使得所述视频壁面的屏幕显示是均匀的。
CN201380005018.4A 2012-01-09 2013-01-09 超亮背光lcd视频显示器 Pending CN104303223A (zh)

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US201261584481P 2012-01-09 2012-01-09
US61/584,481 2012-01-09
PCT/US2013/020781 WO2013106399A1 (en) 2012-01-09 2013-01-09 Ultra-bright back-light lcd video display

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KR (1) KR20140115322A (zh)
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CN105700239A (zh) * 2016-04-22 2016-06-22 深圳市华星光电技术有限公司 背光模组及显示装置
CN107257940A (zh) * 2014-11-21 2017-10-17 法雷奥舒适驾驶助手公司 用于显示器，特别是平视显示器的投影系统以及相关的显示器
CN108303822A (zh) * 2018-01-23 2018-07-20 青岛海信电器股份有限公司 一种背光模组、显示装置及液晶电视

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