CN104965348A - 一种显示面板及电子设备 - Google Patents

一种显示面板及电子设备 Download PDF

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CN104965348A
CN104965348A CN201510416772.8A CN201510416772A CN104965348A CN 104965348 A CN104965348 A CN 104965348A CN 201510416772 A CN201510416772 A CN 201510416772A CN 104965348 A CN104965348 A CN 104965348A
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display panel
light guide
guide plate
plate
reflector
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CN104965348B (zh
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姜宇锐
李得俊
崔宏青
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL Huaxing Photoelectric Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201510416772.8A priority Critical patent/CN104965348B/zh
Priority to US14/783,414 priority patent/US9897797B2/en
Priority to PCT/CN2015/085538 priority patent/WO2017008339A1/zh
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133605Direct backlight including specially adapted reflectors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0933Systems for active beam shaping by rapid movement of an element
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means 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
    • G02B6/0053Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means 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
    • G02B6/0055Reflecting element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133603Direct backlight with LEDs
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/1368Active matrix addressed cells in which the switching element is a three-electrode device
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133601Illuminating devices for spatial active dimming

Abstract

本发明提供一种显示面板,包括增亮膜、导光板和背光光源,所述增亮膜与所述导光板层叠设置,所述背光光源设于导光板侧边,其特征在于,所述显示面板还包括置于所述导光板底部的MEMS反射板,所述MEMS反射板包括控制基板和反射单元,所述控制基板用于控制所述反射单元的工作状态,所述反射单元包括设置在所述控制基板的驱动单元和与所述驱动单元转动连接的反射片,所述驱动单元用于驱动所述反射片旋转。通过在每个像素区域设置旋转反射片的方法,以将像素关闭区域的光线反射到邻近的像素开启区域,达到对每个像素区域的背光光线进行控制,以提高每个像素区域的动态对比度的目的,从而提高显示面板显示的效果。

Description

一种显示面板及电子设备
技术领域
本发明涉及显示技术领域,具体涉及一种微机电系统显示面板。
背景技术
液晶显示装置(LCD,Liquid Crystal Display)具有机身薄、省电、无辐射等众多优点,得到了广泛的应用。现有市场上的液晶显示装置大部分为背光型液晶显示装置,其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子,两片玻璃基板中间有许多垂直和水平的细小电线,通过通电与否来控制液晶分子改变方向,将背光模组的光线折射出来产生画面。
目前,市场上的LCD面板的主要结构如图1所示,包括背光光源1、导光板2、增亮膜3、下偏光片4、TFT基板5、液晶层6、彩膜基板7、上偏光片8、反射片9。通过控制施加在液晶层上的电压控制液晶分子的转向,从而使由背光发出经过下偏光片产生的线偏振光的偏振方向发生一点角度的改变,光透过彩膜基板后形成不同的颜色的光,由于光的偏振方向与上偏光片的透过轴不同夹角,光出射光的强弱就可以控制,从而形成的我们需要显示的画面。
但是在现有技术中,由于液晶显示器液晶并非自发光,必须藉由背光提供光源,但由于液晶分子的配向无法完全符合设计要求等原因,在显示黑画面时,像素无法完全关闭,有一些光线能从面板中发出,造成了对比度较低,无法满足消费者对于高画质的要求。
发明内容
本发明的目的在于提供一种使用MEMS(微机电系统)的显示面板,以提高显示面板的动态对比度,以增强显示效果。
本发明的另一目的在于提供一种使用上述显示面板的电子设备。
为了实现上述目的,本发明实施方式提供如下技术方案:
本发明揭露的一种显示面板,包括增亮膜、导光板和背光光源,所述增亮膜与所述导光板层叠设置,所述背光光源设于导光板侧边,所述显示面板还包括置于所述导光板底部的MEMS反射板,所述MEMS反射板包括控制基板和反射单元,所述控制基板用于控制所述反射单元的工作状态,所述反射单元包括设置在所述控制基板的驱动单元和与所述驱动单元转动连接的反射片,所述驱动单元用于驱动所述反射片旋转。
其中,所述反射片的转动方位角范围为0-360°。
其中,所述反射片与所述驱动单元之间设有球面副,所述球面副包括球面副壳体结构和球面副内部球头,所述球面副内部球头活动安装在球面副壳体结构的内表面。
其中,所述反射片为白反射片或银反射片,其表面涂覆有反射层。
其中,所述显示面板还包括公共电极线、多个像素区域,所述像素区域还包括薄膜晶体管,所述薄膜晶体管的漏极与所述驱动单元输入端连接,所述驱动单元输出端连接所述公共电极线。
其中,每个所述像素区域之内包含至少一个所述反射单元。
其中,所述光源是一白色LED光源或一RGB三原色LED光源。
本发明还揭示了一种电子设备,其特征在于,包括上述的显示面板。
本发明实施例具有如下优点或有益效果:
本发明通过在每个像素区域设置旋转反射片的方法,以将像素关闭区域的光线反射到邻近的像素开启区域,达到对每个像素区域的背光光线进行控制,以提高每个像素区域的动态对比度的目的,从而提高显示面板显示的效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是现有技术的LED面板结构示意图;
图2是本发明LED面板结构示意图;
图3是MEMS反射板结构示意图
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
请参阅图2,本发明实施例提供的显示面板100,包括从上到下依次设置的上偏光片8、彩膜基板7、液晶层6、TFT基板5、下偏光片4、增亮膜3、导光板2、MEMS反射板20,所述导光板2侧边设有背光光源1,即所述MEMS反射板20置于所述导光板2底部,所述MEMS反射板20包括控制基板11和反射单元(未编号),所述反射单元包括设置在所述控制基板11的驱动单元12、与所述驱动单元12转动连接的反射片10。所述所述驱动单元12用于驱动所述反射片10旋转,进而改变光线的反射方向。
进一步的,请参阅图3,所述反射片10与所述驱动单元12通过球面副30的形式连接,所述球面副包括球面副壳体结构和球面副内部球头,所述球面副内部球头活动安装在球面副壳体结构的内表面。所述球面副具有三个自由度,能够在空间内任意旋转,增大了所述反射片10的旋转范围,特别的,通过球面副连接可以保证所述反射片10的转动方位角范围为0-360°。
进一步的,所述显示面板100包括多个像素区域,一个像素区域指的是能够统一控制亮度的一个单元,每个像素区域由多个像素组成。因此,在所述像素区域的的反射光线至少由一个反射单元组成,换而言之,通过反射单元控制不同像素区域的反射光线,例如,当反射单元对应的像素区域像素关闭时,所述驱动单元12驱动所述反射片旋转,将该像素区域的光线反射到相邻的像素开启的像素区域,这样不仅提高了光能的利用率,减小了显示面板的功耗,还可以提高像素区域的动态对比度,提高显示效果。
进一步的,所述显示面板100还包括公共电极线(图未示出)、多条交叉设置的栅极线(图未示出)和数据线(图未示出)、薄膜晶体管,栅极是指包括栅电极和栅极布线(也称为栅极线、栅极信号线、扫描线、扫描信号线等)的整体,或者是指这些中的一部分。栅电极指的是其中间夹着栅极绝缘膜与形成沟道区的半导体重叠的部分的导电膜。此外,栅电极的一部分有时其中间夹着栅极绝缘膜与LDD(Lightly Doped Drain;轻掺杂漏极)区或源区(或漏区)重叠。栅极布线是指用于连接各晶体管的栅电极之间的布线、用于连接各像素所具有的栅电极之间的布线、或用于连接栅电极和其它布线的布线。
另外,由与栅电极相同的材料形成成并形成与栅电极相同的岛而连接的部分(区域、导电膜、布线等)也可以称为栅电极。与此同样,由与栅极布线相同的材料形成成并形成与栅极布线相同的岛而连接的部分(区域、导电膜、布线等)也可以称为栅极布线。严密地说,有时这种部分(区域、导电膜、布线等)与沟道区不重叠,或者,不具有与其它栅电极之间实现连接的功能。但是,因为制造时的条件等,具有由与栅电极或栅极布线相同的材料形成成并形成与栅电极或栅极布线相同的岛而连接的部分(区域、导电膜、布线等)。因此,这种部分(区域、导电膜、布线等)也可以称为栅电极或栅极布线。
薄膜晶体管的栅极连接栅极线,源极连接数据线,驱动单元12的输入端连接薄膜晶体管的漏极,输出端连接公共电极线。通过薄膜晶体管给驱动单元11提供驱动信号,这样即可独立控制各像素区域显示的内容。
进一步的,所述彩膜基板7用于将背光光源发出的光线透过彩膜基板7后能够实现图像的彩色化,所述彩膜基板1包括RGB彩膜层(即红色彩膜、绿色彩膜和蓝色彩膜)(图未示出)。
较佳的,所述反射片10为具有高反射率的反射片,用于在一定的光源输出时提高显示面板100的正视亮度。所述反射片10为白反射片或银反射片,其表面涂覆有反射层,涂覆的反射层选用反射率在50%以上的反射材料,以提高反射效果。
进一步的,作为光源,可以使用冷阴极管或LED(发光二极管)。作为LED,可以使用白色LED,或者,也可以组合每个颜色的LED(例如白色、红色、蓝色、绿色、蓝绿色、紫红色、黄色等)。通过使用LED,由于光的波长峰值尖锐,所以可以提高颜色纯度。在采用侧光型的情况下,配置导光板,来实现均匀的面光源。
进一步的,所述导光板2采用光学级亚克力(Polymethylmethacrylate,PMMA)/聚碳酸酯(Polycarbonate,PC)为基材,其用于将线光源转变为面光源。
本发明还提供了一种使用上述显示面板的电子设备,所述电子设备可以是带有显示面板的时钟、带有显示面板的手表、个人计算机、液晶电视、取景型或者监控直视型录像机、导航装置、寻呼机、电子记事本、计算器、文字处理机、工作站、可视电话机、POS终端器等。
以上所述的实施方式,并不构成对该技术方案保护范围的限定。任何在上述实施方式的精神和原则之内所作的修改、等同替换和改进等,均应包含在该技术方案的保护范围之内。

Claims (8)

1.一种显示面板,包括增亮膜、导光板和背光光源,所述增亮膜与所述导光板层叠设置,所述背光光源设于所述导光板侧边,其特征在于,所述显示面板还包括置于所述导光板底部的MEMS反射板,所述MEMS反射板包括控制基板和反射单元,所述控制基板用于控制所述反射单元的工作状态,所述反射单元包括设置在所述控制基板的驱动单元和与所述驱动单元转动连接的反射片,所述驱动单元用于驱动所述反射片旋转。
2.如权利要求1所述的显示面板,其特征在于,所述反射片的转动方位角范围为0-360°。
3.如权利要求2所述的显示面板,其特征在于,所述反射片与所述驱动单元之间设有球面副,所述球面副包括球面副壳体结构和球面副内部球头,所述球面副内部球头活动安装在所述球面副壳体结构的内表面。
4.如权利要求2或3所述的显示面板,其特征在于,所述反射片为白反射片或银反射片,其表面涂覆有反射层。
5.如权利要求1所述的显示面板,其特征在于,所述显示面板还包括公共电极线、多个像素区域,所述像素区域还包括薄膜晶体管,所述薄膜晶体管的漏极与所述驱动单元输入端连接,所述驱动单元输出端连接所述公共电极线。
6.如权利要求5所述的显示面板,其特征在于,每个所述像素区域之内包含至少一个所述反射单元。
7.如权利要求1所述的LED背光结构,其特征在于,所述光源是一白色LED光源或一RGB三原色LED光源。
8.一种电子设备,其特征在于,包括权利要求1-7任意一项所述的显示面板。
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