CN117471760A - 一种车载可控防窥显示屏 - Google Patents

一种车载可控防窥显示屏 Download PDF

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CN117471760A
CN117471760A CN202311314931.4A CN202311314931A CN117471760A CN 117471760 A CN117471760 A CN 117471760A CN 202311314931 A CN202311314931 A CN 202311314931A CN 117471760 A CN117471760 A CN 117471760A
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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
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
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    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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Abstract

一种车载可控防窥显示屏，定位结构中设置有一个电路板和一个导光板，电路板上间隔交错设置有若干个第一光源和若干个第二光源，所述导光板上设置有若干个防窥组件，任意相邻的两个防窥组件之间均设置有间隙，所述第二光源一一对应地设置在所述间隙的正下方，任意一个防窥组件均各自包括一个防窥光栅和两个不透光结构，两个不透光结构分别设置在防窥光栅的两侧，防窥光栅一一对应地设置在所述第一光源的正上方，第一光源发出的光线的照射点均位于防窥组件的底面上。本发明具有防窥模式和共享模式，可根据需要切换为防窥模式或者共享模式，只需要一层导光层以及一层光源就能实现显示屏主动防窥功能，结构简单，加工工艺简化，降低了成本。

Description

一种车载可控防窥显示屏
技术领域
本发明涉及物理领域，尤其涉及车载液晶屏主动防窥技术，特别是一种车载可控防窥显示屏。
背景技术
液晶显示面板是目前市场主流的平板显示器，从仪表、手机等微小尺寸到监视器、超大型电视机等中大尺寸各种显示领域均有应用，在公共场合或工业生产地都能见到各种类型的液晶显示器。而正是由于液晶显示器如此广泛的使用，使得显示器显示内容的私隐性越来越重要。现有技术中，针对显示器的防窥做法通常是在显示器表面贴附防窥膜，此方式虽然能够防止旁边的人看到显示器上的信息，但是该防窥功能缺少可控性，如果主驾驶员想将显示器上的信息分享给位于特定视角的副驾驶员观看并讨论时，就需要调整显示器正对角度才能让副驾驶员看到。现有技术中存在双背光方式的主动防窥结构，但是这种结构复杂，包括两层导光层和两层LED光源，一层用于防窥，一层用于共享，加工、安装工艺复杂，成本较高。
发明内容
本发明的目的在于提供一种车载可控防窥显示屏，所述的这种车载可控防窥显示屏要解决现有技术缺少结构简单、加工安装工艺简单的车载防窥显示屏的技术问题。
本发明的一种车载可控防窥显示屏，包括外壳，所述外壳中从下至上依次设置有定位结构、扩散板、双增亮膜、显示板，定位结构中设置有一个电路板和一个导光板，导光板位于电路板的上方，所述电路板上间隔交错设置有若干个第一光源和若干个第二光源，所述导光板上设置有若干个防窥组件，任意相邻的两个防窥组件之间均设置有间隙，所述第二光源一一对应地设置在所述间隙的正下方，任意一个防窥组件均各自包括一个防窥光栅和两个不透光结构，两个不透光结构分别设置在防窥光栅的两侧，防窥光栅一一对应地设置在所述第一光源的正上方，第一光源发出的光线的照射点均位于防窥组件的底面上，任意一个不透光结构上表面均各自设置有倾斜的反光面，反光面与导光板上表面之间的夹角大于或等于120°。
进一步的，所述第二光源的发光角度大于或等于120°。
进一步的，所述第一光源和第二光源均为LED灯。
进一步的，所述扩散板的扩散角度为10°。
本发明与现有技术相比，其效果是积极和明显的。本发明的一种车载可控防窥显示屏，具有防窥模式和共享模式，可根据需要切换为防窥模式或者共享模式，只需要一层导光层以及一层光源就能实现显示屏主动防窥功能，结构简单，加工工艺简化，降低了成本。
附图说明
图1为本发明的一种车载可控防窥显示屏的示意图。
图2为图1的局部放大示意图。
具体实施方式
以下结合附图和实施例对本发明作进一步描述，但本发明并不限制于本实施例，凡是采用本发明的相似结构及其相似变化，均应列入本发明的保护范围。本发明中的上、下、前、后、左、右等方向的使用仅为了描述方便，并非对本发明的技术方案的限制。
如图1和图2所示，本发明的一种车载可控防窥显示屏，包括外壳1，所述外壳1中从下至上依次设置有定位结构2、扩散板3、双增亮膜4、显示板5，定位结构2中设置有一个电路板6和一个导光板7，导光板7位于电路板6的上方，所述电路板6上间隔交错设置有若干个第一光源8和若干个第二光源9，所述导光板7上设置有若干个防窥组件10，任意相邻的两个防窥组件10之间均设置有间隙，所述第二光源9一一对应地设置在所述间隙的正下方，任意一个防窥组件10均各自包括一个防窥光栅11和两个不透光结构12，两个不透光结构12分别设置在防窥光栅11的两侧，防窥光栅11一一对应地设置在所述第一光源8的正上方，第一光源8发出的光线的照射点14均位于防窥组件10的底面上，任意一个不透光结构12上表面均各自设置有倾斜的反光面13，反光面13与导光板7上表面之间的夹角θ3大于或等于120°。
进一步的，所述第二光源9的发光角度大于或等于120°。
进一步的，所述第一光源8和第二光源9均为LED灯。
进一步的，所述扩散板3的扩散角度为10°。小角度扩散膜，改善均匀度和光斑，且对防窥效果影响小。
具体的，第一光源8发出的光线的照射点14均位于防窥组件10的底面上的具体含义如图2所示：第一光源8边缘的光线的发光角度(与第一光源上表面的夹角)为θ2，第一光源8的边缘与不透光结构12边缘之间连接辅助线，该辅助线与第一光源上表面的夹角为θ1，θ2小于θ1，这样第一光源8发光不会造成串光，不影响防窥效果。根据θ2<θ1的要求，设计第一光源8与导光板7之间的距离值。
具体的，第一光源8采用发光角度窄的Chip LED(表面贴装芯片LED(PCB型))，具体角度要求视防窥组件10尺寸而定。
具体的，防窥光栅11类似百叶窗，由三个不透光块依次排列构成，相邻的不透光块之间设置有缝隙，小角度的光才能通过缝隙，从而起到防窥效果。不透光结构12由不透光材料构成，在不透光结构12的表面喷涂反光材料形成反光面13。
具体的，本发明的显示屏背光模组采用直下式背光结构，能提升显示图像质量。显示屏面板为FOG膜，为TFT显示面板，用于显示具体内容。双增亮膜4用于增加亮度。定位结构2起到定位作用，提高防窥组件10的安装位置精度。
具体的，本实施例中的外壳1、定位结构2、扩散板3、双增亮膜4、显示板5、电路板6、导光板7、第一光源8、第二光源9、防窥光栅11、不透光结构12等均采用现有技术中的公知方案，本领域技术人员均已了解，在此不再赘述。
本实施例的工作原理：
当第一光源8点亮，第二光源9熄灭时，显示屏为防窥模式，不透光结构12是不透光的，第一光源8发出的光线只能从防窥光栅11中的缝隙通过，通过后的光线角度较小，视角缩窄，旁边人员在大于该视角的位置看不到光线，因此无法看到显示内容，起到防窥效果。当第一光源8熄灭，第二光源9点亮时，显示屏为共享模式，θ3>120°，这样第二光源9发出的光线通过相邻的两个防窥组件10之间的间隙后，旁边人员在大角度下也可以看到光线，从而可以看到显示内容。
本发明的一种车载可控防窥显示屏，具有防窥模式和共享模式，可根据需要切换为防窥模式或者共享模式，只需要一层导光层以及一层光源就能实现显示屏主动防窥功能，结构简单，加工工艺简化，降低了成本。

Claims (4)

1.一种车载可控防窥显示屏，包括外壳，其特征在于：所述外壳中从下至上依次设置有定位结构、扩散板、双增亮膜、显示板，定位结构中设置有一个电路板和一个导光板，导光板位于电路板的上方，所述电路板上间隔交错设置有若干个第一光源和若干个第二光源，所述导光板上设置有若干个防窥组件，任意相邻的两个防窥组件之间均设置有间隙，所述第二光源一一对应地设置在所述间隙的正下方，任意一个防窥组件均各自包括一个防窥光栅和两个不透光结构，两个不透光结构分别设置在防窥光栅的两侧，防窥光栅一一对应地设置在所述第一光源的正上方，第一光源发出的光线的照射点均位于防窥组件的底面上，任意一个不透光结构上表面均各自设置有倾斜的反光面，反光面与导光板上表面之间的夹角大于或等于120°。
2.根据权利要求1所述的一种车载可控防窥显示屏，其特征在于：所述第二光源的发光角度大于或等于120°。
3.根据权利要求1所述的一种车载可控防窥显示屏，其特征在于：所述第一光源和第二光源均为LED灯。
4.根据权利要求1所述的一种车载可控防窥显示屏，其特征在于：所述扩散板的扩散角度为10°。
CN202311314931.4A 2023-10-11 2023-10-11 一种车载可控防窥显示屏 Pending CN117471760A (zh)

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