CN205027928U - 导光板、背光源和智能手表 - Google Patents

导光板、背光源和智能手表 Download PDF

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CN205027928U
CN205027928U CN201520705297.1U CN201520705297U CN205027928U CN 205027928 U CN205027928 U CN 205027928U CN 201520705297 U CN201520705297 U CN 201520705297U CN 205027928 U CN205027928 U CN 205027928U
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light
guide plate
light guide
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backlight
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季春燕
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BOE Technology Group Co Ltd
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Priority to PCT/CN2016/074637 priority patent/WO2017041450A1/zh
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0082—Visual time or date indication means by building-up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represents the time, i.e. combinations of G04G9/02 and G04G9/08
    • G04G9/0094—Visual time or date indication means by building-up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represents the time, i.e. combinations of G04G9/02 and G04G9/08 using light valves, e.g. liquid crystals
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • G02B6/0033—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
    • 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
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
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    • G—PHYSICS
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    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/163—Wearable computers, e.g. on a belt
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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Abstract

本实用新型公开了一种导光板、背光源和智能手表，涉及显示领域。可实现多角度、多形状导光，简化光学设计，有效提升背光源出光的均一性和出光效率，解决了现有导光板单边入光不适应圆形显示屏，光学布点设计复杂，无法保证出光均一性的问题。本实用新型提供的导光板，具有弧形的入光边；发光元件沿弧形的入光边分布式设置。

Description

导光板、背光源和智能手表
技术领域
本实用新型涉及显示领域，尤其涉及一种导光板、背光源和智能手表。
背景技术
随着移动技术的发展，许多传统的电子产品也开始增加移动方面的功能，比如过去只能用来看时间的手表，现今也可以通过智能手机或家庭网络与互联网相连，显示来电信息、Twitter和新闻feeds、天气信息等内容。这种新手表可被称作智能手表，主要是为消费者在不方便使用智能手机的情况下使用而设计的，比如正在骑自行车或手上提满了东西的时候。
消费调查表明，智能手表最受消费者青睐的外观是接近传统手表的圆形，但是目前基于液晶显示面板(LiquidCrystalDisplay，LCD)的智能手表屏其背光源设计仍为单边入光，如此如果要适应圆形显示屏，需要复杂的光学布点设计，但即便是这样仍难以保证出光的均一性。
实用新型内容
本实用新型提供一种导光板、背光源和智能手表，解决了现有导光板单边入光不适应圆形显示屏，光学布点设计复杂，无法保证出光均一性的问题。
为达到上述目的，本实用新型的实施例采用如下技术方案：
本实用新型的实施例提供一种导光板，所述导光板具有弧形的入光边；发光元件沿弧形的入光边分布式设置。
优选地，所述弧形的入光边设置有用于放置所述发光元件的凹槽。
可选地，所述导光板为圆形导光板，所述弧形的入光边为圆形导光板的圆周。
可选地，所述圆形导光板的侧面每隔相同角度设置有用于放置所述发光元件的凹槽。
可选地，设置凹槽的角度间隔范围为45～120度。
所述圆形导光板的底面设置有多个导光点。
优选地，越靠近所述发光元件所述导光点越稀疏。
优选地，越靠近所述发光元件所述导光点越小。
本实用新型的实施例还提供一种背光源，包括任一项所述的导光板和发光元件，所述发光元件沿所述导光板的弧形的入光边设置。
所述导光板为圆形导光板，所述圆形导光板的侧面每隔相同角度设置有凹槽，所述发光元件设置于所述凹槽内。
所述发光元件为发光二极管。
所述发光元件为柔性衬底的发光二极管。
本实用新型实施例还提供的一种智能手表，包括任一项所述的背光源。
本实用新型实施例提供的导光板、背光源和智能手表，采用具有弧形的入光边的导光板，发光元件沿弧形的入光边分布式设置，出光均匀，适用于具有弧形边的显示屏，例如智能手表的圆形显示屏，能解决了现有导光板单边入光不适应圆形显示屏，光学布点设计复杂，无法保证出光均一性的问题。
附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例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实用新型的一些实施例，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它的附图。
图1为本实用新型实施例提供的导光板的正面结构示意图；
图2为本实用新型实施例提供的导光板的底面导光点的分布示意图；
图3为本实用新型实施例提供的导光板的底面导光点的疏密变化示意图；
图4为本实用新型实施例提供的导光板的截面结构示意图。；
附图标记
10-导光板，100-出光面，101-凹槽，102-导光点，20-LED。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型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实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，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它实施例，都属于本实用新型保护的范围。
本实用新型实施例提供一种导光板，所述导光板具有弧形的入光边；发光元件沿弧形的入光边分布式设置。
所述导光板具有弧形的入光边，即，导光板的外周为闭合的弧形，外周侧为入光侧，入光侧上待设置光源的区域分布式设置。
有些显示屏形状特殊，具有弧形边，例如智能手表的外周侧为圆形、近圆形的显示屏，为与之适应，本实施例将导光板亦具有弧形边，为达到出光均匀的目的，将弧形边设置为入光边(即弧形外周侧设置为入光侧)，发光元件(如发光二极管，LED)则采用分布式设计，能解决了现有导光板单边入光不适应圆形显示屏，光学布点设计复杂，无法保证出光均一性的问题。需要说明的是，如果本实施例导光板还包括直线型的入光边，直线型的入光边处的发光元件可按现有技术设置，也可以进行分布式设计。
优选地，上述弧形的入光边还设置有用于放置发光元件的凹槽，发光元件置于凹槽内，一方面便于固定发光元件并实现发光元件的分布式设置；另一方面可以增加光的入射量而不用增加安装空间。
上述导光板的底面设置有多个导光点。优选地，本实施例可将导光点进行优化设计，以出光均匀为佳。例如，可以是越靠近发光元件导光点越疏，或者，越靠近发光元件导光点越小，当然，也可以是越靠近发光元件导光点越疏同时导光点尺寸也越小，这样可以达到均匀出光的目的。上述导光板的底面指导光板上与导光板出光面相对的另一面。
本实用新型提供一种具有弧形入光边的导光板，光源分布式置于弧形的入光边，实现多角度、多形状导光，简化光学设计，有效提升背光源出光的均一性和出光效率。
本实用新型的实施例还提供一种背光源，包括上述任一项所述的导光板和发光元件，所述发光元件沿所述导光板的弧形的入光边设置，能实现均匀出光，而无需复杂的光学布点设计，能解决了现有导光板单边入光不适应圆形显示屏，光学布点设计复杂，无法保证出光均一性的问题。
如果导光板为圆形导光板，所述圆形导光板的侧面每隔相同角度设置有凹槽，所述发光元件设置于所述凹槽内。如果导光板为圆形导光板，所述发光元件优选为柔性衬底的发光二极管。可选地，上述发光元件为发光二极管。本实施例提供一种圆形背光源，可以实现全圆导光，简化光学设计，有效提升背光源出光的均一性和出光效率。
本实用新型实施例提供的背光源，发光元件分布式放置，适应具有弧形边的显示屏，例如圆形、近圆形或具有弧度边的智能手表显示屏等，可以实现全圆导光，简化光学设计，有效提升背光源出光的均一性和出光效率。本实用新型实施例提供的背光源，还可包括背板、胶框、反射片、增光膜/片、扩散膜/片等结构，因与本实用新型并不相关，在此不再赘述。
为了本领域技术人员更好的理解本实用新型实施例提供的导光板及背光源的结构，下面通过具体的实施例并结合附图对本实用新型提供的导光板及背光源进行详细说明。
如图1所示，为一适用于智能手表的圆形导光板10，其入光边为圆形导光板的圆周，圆形导光板10的侧面每隔相同角度制作一个凹槽101用于放置LED20。可选的，一个凹槽101至少放置一个LED20。
可选的，设置凹槽的角度间隔范围为45～120度。对于智能手表而言，通常3～4颗2.5-3V电压的LED即可满足需求。当放置3颗LED20时，一般每隔120°放置一颗LED20；同理，放置四颗LED20时每隔90°放置一颗LED20。若导光板为规则的圆形，则优选柔性或者小尺寸LED20来匹配，这里不再赘述。
上述设计下的导光板的导光点分布无需十分复杂的分区设计，除去留白区，边缘稀疏、中间略密的辐射状导光点102排布可以使出光达到较高的均一性，如图2、图3所示。图3中，沿箭头方向，导光点102呈现由疏至密的变化。
本实施例导光板10由透明材料制成，从侧表面接收来自发光元件(即LED20)的光，沿上下表面导引光。导光板10的下表面(即底面)设有导光点102，上表面为光滑平面，为出光面100。当发光元件发出的光从圆周侧面各个方向进入导光板10时，大部分被导光点102反射后导向上表面出射，少部分会从下表面出射，这部分光被背光模组的反射片反射可以实现重复利用，具体如图4所示。
由于LED光源发散角度高达120°以上，因此LED的上述分布方式可获得近圆形的均匀发光区。可选地，越靠近光源，导光点102的密度设计得越小，间距越大。即，靠近光源的导光点102的分布密度小于远离光源的导光点102的分布密度。
实际设计中并不限于此，还可以调整导光点102的尺寸，例如越靠近光源导光点102越小，如此亦可保证导光板导光的均一性。即，靠近光源的导光点102的尺寸小于远离光源的导光点102的尺寸。
当然，还可以同时调整导光点102的尺寸和分布密度。
如上所述，本实用新型实施例利用分布式的光源排布实现了全圆导光，简化光学设计，同时提升光学效率。图示仅作为部分示例，可在此基础适当拓展，例如，导光板还可以是椭圆形、心形、马蹄形等等，在具有弧度的入光边采用上述设计，可以实现周边入光，出光更均匀。
本实用新型提供的导光板不限于圆形，也可以为N边形，N可以为大于等于4的正整数，例如，导光板为八边形。
本实用新型实施例还提供的一种智能手表，包括任一项所述的背光源。因采用了本实施例提供的适合圆形、近圆形(如多边形)显示屏的背光源，显示效果更佳。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于设备实施例而言，由于其基本相似于方法实施例，所以描述得比较简单，相关之处参见方法实施例的部分说明即可。
以上所述，仅为本实用新型的具体实施方式，但本实用新型的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本实用新型的保护范围之内。因此，本实用新型的保护范围应该以权利要求的保护范围为准。

Claims (13)

1.一种导光板，其特征在于，所述导光板具有弧形的入光边；发光元件沿弧形的入光边分布式设置。
2.根据权利要求1所述的导光板，其特征在于，
所述弧形的入光边设置有用于放置所述发光元件的凹槽。
3.根据权利要求1或2所述的导光板，其特征在于，
所述导光板为圆形导光板，所述弧形的入光边为圆形导光板的圆周。
4.根据权利要求3所述的导光板，其特征在于，
所述圆形导光板的侧面每隔相同角度设置有用于放置所述发光元件的凹槽。
5.根据权利要求3所述的导光板，其特征在于，设置凹槽的角度间隔范围为45～120度。
6.根据权利要求3所述的导光板，其特征在于，
所述圆形导光板的底面设置有多个导光点。
7.根据权利要求6所述的导光板，其特征在于，
越靠近所述发光元件所述导光点越稀疏。
8.根据权利要求6所述的导光板，其特征在于，
越靠近所述发光元件所述导光点越小。
9.一种背光源，其特征在于，包括权利要求1-8任一项所述的导光板和发光元件，所述发光元件沿所述导光板的弧形的入光边设置。
10.根据权利要求9所述的背光源，其特征在于，
所述导光板为圆形导光板，所述圆形导光板的侧面每隔相同角度设置有凹槽，所述发光元件设置于所述凹槽内。
11.根据权利要求9所述的背光源，其特征在于，
所述发光元件为发光二极管。
12.根据权利要求10或11所述的背光源，其特征在于，所述发光元件为柔性衬底的发光二极管。
13.一种智能手表，其特征在于，包括权利要求9-12任一项所述的背光源。
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