CN106647039A - 一种透红外的背光模组 - Google Patents

一种透红外的背光模组 Download PDF

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Publication number
CN106647039A
CN106647039A CN201710115385.XA CN201710115385A CN106647039A CN 106647039 A CN106647039 A CN 106647039A CN 201710115385 A CN201710115385 A CN 201710115385A CN 106647039 A CN106647039 A CN 106647039A
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backlight
guide plate
light guide
diffusion barrier
backlight module
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CN201710115385.XA
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余俊
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WUHAN YIWEIDENG TECHNOLOGY DEVELOPMENT Co Ltd
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WUHAN YIWEIDENG TECHNOLOGY DEVELOPMENT Co Ltd
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Publication of CN106647039A publication Critical patent/CN106647039A/zh
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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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected

Abstract

本发明公开了一种背光模组和触摸屏，其中背光模组，包括置于液晶玻璃后的背光扩散膜，所述背光扩散膜与导光板之间设有弹性支撑体，所述导光板的两侧具有光源发生器件，所述导光板相对弹性支撑体的另一侧面设有反射板。本发明旨在于，通过增加导光板到背光散射膜的距离，以扩大背光进入背光扩散膜的平均入射角，仅通过背光扩散板对导光板的光点进行扩散。那么，取消棱镜的使用，能够保证红外线在光衰较小时，获得足够均匀的背光效果。

Description

一种透红外的背光模组
技术领域
本发明涉及多媒体触控技术领域，更具体地涉及一种一种透红外的背光模组
背景技术
传统的多点触控面板技术是采用若干个850nmX50mw的红外一字线激光头作为基准端，其分别固定在屏幕的四个边角。位于四个边角的红外一字线激光头在工作后，红外激光铺满整个屏幕。此时，当有物体贴近屏幕时，红外激光会被物体阻挡而反射，继而形成亮斑。位于屏幕内的红外摄像头对上述的亮斑进行捕捉，并将捕捉的画面传递至微处理器进行数据分析，以获得物体是贴近在屏幕上的具体位置，继而完成后续互动。
传统的多点触控面板结构简单、易于实现。且随着布置在屏幕上红外一字激光头数量的增多，其触控精度亦可以提高。
然而，由于在多点触控面板的桌面不能安装足够功率的散热器，就无法穿透液晶玻璃进行触控捕捉，只能使用效果很差的投影进行视显。
发明内容
本发明的目的是克服或减缓至少上述缺点中的部分，特此提供一种透红外的背光模组，包括置于液晶玻璃后的背光扩散膜，所述背光扩散膜与导光板之间设有弹性支撑体，所述导光板的两侧具有光源发生器件，所述导光板相对弹性支撑体的另一侧面设有反射板。
优选地，所述背光扩散膜的一面为光滑平面，另一面为粗糙面，所述背光扩散膜的光滑平面与液晶玻璃胶合，其粗糙面抵触弹性支撑体。
优选地，所述弹性支撑体为弹性海绵，所述弹性海绵的一侧面贴合背光扩散膜，另一侧面贴合导光板。
本发明旨在于，通过增加导光板到背光散射膜的距离，以扩大背光进入背光扩散膜的平均入射角，仅通过背光扩散板对导光板的光点进行扩散。
附图说明
现在将参照所附附图更加详细地描述本发明的这些和其它方面，其所示为本发明的当前优选实施例。其中：
图1为背光模组的侧面剖视图；
图中：1、液晶玻璃；2、背光扩散膜；3、弹性支撑体；4、LED灯；5、导光板；6、反射板；7、红外摄像头；8、触控玻璃。
具体实施方式
下面结合附图和具体实例，进一步阐明本发明，应理解这些实施例仅用于说明本发明而不用于限制本发明的范围，在阅读了本发明之后，本领域技术人员对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。
如图1所示，一种透红外的背光模组，包括置于液晶玻璃1后的背光扩散膜2，背光扩散膜2与导光板5之间设有弹性支撑体3，导光板5的两侧具有光源发生器件，导光板5相对弹性支撑体3的另一侧面设有反射板6。
相比于传统的背光模组，本实施例的导光板5和背光扩散膜2之间通过弹性支撑体3间隔形成间隙，则导光板5上任意一点输出的光线在背光扩散膜2上所能达到的最大入射角随该间隙的距离扩大而扩大。那么，在背光进入背光扩散膜2的平均入射角增大后，仅依靠背光扩散膜2即可对背光实现有效的扩散。
优选地，背光扩散膜2的一面为光滑平面，另一面为粗糙面，背光扩散膜2的光滑平面与液晶玻璃1胶合，其粗糙面抵触弹性支撑体3。
那么，背光由粗糙面进入背光扩散膜2时，能够进一步地扩大背光的折射角度，使背光更加均匀；而红外线在由光滑面进入背光扩散膜2，且由粗糙面射出时，折射角度小，避免了折射对红外光路的影响。

Claims (3)

1.一种透红外的背光模组，其特征在于，包括置于液晶玻璃后的背光扩散膜，所述背光扩散膜与导光板之间设有弹性支撑体，所述导光板的两侧具有光源发生器件，所述导光板相对弹性支撑体的另一侧面设有反射板。
2.根据权利要求1所述的背光模组，其特征在于，所述背光扩散膜的一面为光滑平面，另一面为粗糙面，所述背光扩散膜的光滑平面与液晶玻璃胶合，其粗糙面抵触弹性支撑体。
3.根据权利要求1所述的背光模组，其特征在于，所述弹性支撑体为弹性海绵，所述弹性海绵的一侧面贴合背光扩散膜，另一侧面贴合导光板。
CN201710115385.XA 2017-03-01 2017-03-01 一种透红外的背光模组 Withdrawn CN106647039A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114200693A (zh) * 2021-11-17 2022-03-18 广东未来科技有限公司 显示光栅、3d显示装置、显示光栅的制备及3d显示方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005114045A1 (ja) * 2004-05-21 2005-12-01 Sharp Kabushiki Kaisha バックライトユニット及びそれを備えた液晶表示装置
JP2006011143A (ja) * 2004-06-28 2006-01-12 Optrex Corp 液晶表示装置
CN202118702U (zh) * 2011-06-14 2012-01-18 华映视讯（吴江）有限公司 背光模组
CN202165953U (zh) * 2011-08-11 2012-03-14 北京京东方光电科技有限公司 一种背光模组、液晶面板及液晶显示器
CN104903783A (zh) * 2013-07-19 2015-09-09 堺显示器制品株式会社 显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005114045A1 (ja) * 2004-05-21 2005-12-01 Sharp Kabushiki Kaisha バックライトユニット及びそれを備えた液晶表示装置
JP2006011143A (ja) * 2004-06-28 2006-01-12 Optrex Corp 液晶表示装置
CN202118702U (zh) * 2011-06-14 2012-01-18 华映视讯（吴江）有限公司 背光模组
CN202165953U (zh) * 2011-08-11 2012-03-14 北京京东方光电科技有限公司 一种背光模组、液晶面板及液晶显示器
CN104903783A (zh) * 2013-07-19 2015-09-09 堺显示器制品株式会社 显示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114200693A (zh) * 2021-11-17 2022-03-18 广东未来科技有限公司 显示光栅、3d显示装置、显示光栅的制备及3d显示方法

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Application publication date: 20170510