WO2017185415A1 - 导光板、背光模组及显示装置 - Google Patents

导光板、背光模组及显示装置 Download PDF

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Publication number
WO2017185415A1
WO2017185415A1 PCT/CN2016/081853 CN2016081853W WO2017185415A1 WO 2017185415 A1 WO2017185415 A1 WO 2017185415A1 CN 2016081853 W CN2016081853 W CN 2016081853W WO 2017185415 A1 WO2017185415 A1 WO 2017185415A1
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WO
WIPO (PCT)
Prior art keywords
light
reflective
guide plate
reflecting
light guide
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PCT/CN2016/081853
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English (en)
French (fr)
Inventor
常建宇
陈锦雄
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/100,444 priority Critical patent/US20180096639A1/en
Publication of WO2017185415A1 publication Critical patent/WO2017185415A1/zh

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    • 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
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • 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
    • 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
    • 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
    • G02B6/0018—Redirecting means on the surface of the light guide
    • 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

Definitions

  • the present application relates to the field of backlight technologies for liquid crystal displays, and in particular, to a light guide plate and a backlight module.
  • the backlight module in the prior art is usually a side-lit backlight structure, that is, the light source is located on the side of the light guide plate, that is, the side of the light guide plate is a light-incident surface, and the top surface of the light guide plate is a light-emitting surface, which is usually guided.
  • a reflective sheet is added to the bottom surface of the light panel to reflect more light to the light exit surface.
  • the side surface of the light guide plate since the light guide plate has a rectangular plate-shaped structure, the side surface of the light guide plate is generally perpendicular to the top surface and the bottom surface, so that the light-emitting surface on the side of the light-incident surface of the light guide plate is obviously bright. Lines, bright lines are generated because they are close to the source and the light is concentrated in one area by reflection. The presence of a bright line leads to a poor display of the display device.
  • the present invention provides a light guide plate, a backlight module, and a display device.
  • the structural design of the light guide plate solves the problem of generating a bright line in the prior art, and is beneficial to improving the display effect of the display device.
  • the present application provides a light guide plate
  • the light guide plate includes a light incident surface, a light exit surface, a reflective surface, and a first reflective surface, and the light emitting surface and the reflective surface are oppositely disposed, and the first reflective surface is connected.
  • the light-incident surface is connected between the first light-reflecting surface and the reflecting surface, and the light-incident surface is configured to receive light of a light source, a reflective surface and the extension of the light exiting surface
  • a first chamfer is formed between the long faces, and the first chamfer is an acute angle.
  • the value of the first chamfer angle is greater than 0 degrees and less than or equal to 35 degrees.
  • the light guide plate further includes a second reflective surface, the second reflective surface is connected between the light incident surface and the reflective surface, and between the second reflective surface and the extended surface of the reflective surface A second chamfer angle is formed, the second chamfer angle being an acute angle.
  • the value of the second chamfer angle is greater than 0 degrees and less than or equal to 35 degrees.
  • the second reflective surface and the first reflective surface are symmetrically disposed on both sides of the light incident surface.
  • the second reflective surface and/or the first reflective surface have a planar structure.
  • the surface of the first reflective surface and/or the second reflective surface is provided with a reflective coating.
  • the present application further provides a backlight module, comprising the light guide plate and the light source according to any one of the above items, wherein the light source faces the light incident surface of the light guide plate.
  • the backlight module further includes a reflective sheet, and the reflective sheet is attached to the reflective surface by an optical adhesive.
  • the present application further provides a display device, where the display device includes the backlight module.
  • the light guide plate provided by the present application has a first reflective surface formed between the light-emitting surface and the light-incident surface, and a first angle formed between the first reflective surface and the extended surface of the light-emitting surface is an acute angle, so that the light hits the first After a reflective surface, the first reflective surface is reflected to the first position on the reflective surface. If there is no first reflective surface, the light of the same angle will hit the extended surface of the light-emitting surface, and the extended surface of the light-emitting surface will be light. The second position reflected to the reflective surface is further away from the light incident surface than the second position.
  • the design of the first reflective surface the light at a position closer to the light source is pulled away, that is, the light on the low beam side of the light guide plate is weakened, so that the light exit surface of the light guide plate is close to the light source.
  • the brightness of the light on one side is weakened, which solves the problem of generating bright lines in the prior art, and is advantageous for improving the display effect of the display device.
  • FIG. 1 is a schematic diagram of a light guide plate provided by an embodiment of the present application.
  • FIG. 2 is a partial schematic view of a light guide plate provided by an embodiment of the present application.
  • FIG. 3 is a partial schematic view of a light guide plate according to another embodiment of the present application.
  • FIG. 4 is a schematic view showing conduction of three light rays by a light guide plate of the prior art.
  • FIG. 5 is a schematic diagram of conduction of three light rays by a light guide plate provided by the present application.
  • FIG. 6 is a schematic diagram of the effect of the change of the size X corresponding to the first reflecting surface of the light guiding plate in the light-emitting surface direction and the size Y corresponding to the first reflecting surface in the direction of the light-incident surface of the light-guiding plate provided by the present application. .
  • FIG. 7 is a graph showing the relationship between the angle of the first chamfer of the light guide plate and the peak line size of the light guide provided by the present application.
  • FIG. 8 is a graph showing the relationship between the angle of the first chamfer of the light guide plate and the relative light coupling efficiency provided by the present application.
  • the present invention provides a light guide plate, a backlight module, and a display device.
  • the light guide plate is applied to a backlight module of a display device, which can solve the problem of generating a bright line in the prior art, and is beneficial to improving the display effect of the display device.
  • the backlight module provided by the present application includes the light guide plate and the light source, and the light source faces the light incident surface of the light guide plate.
  • the backlight module further includes a reflective sheet, and the reflective sheet is attached to the reflective surface by an optical adhesive.
  • the light guide plate has a substantially rectangular parallelepiped structure, and the light guide plate includes a light incident surface 11 , a light exit surface 12 , a reflective surface 13 , and a first reflective surface 14 .
  • the light exit surface 12 and the reflection surface 13 are respectively a top surface and a bottom surface
  • the light incident surface 11 is a side surface
  • the first light reflecting surface 14 is formed at one edge of the light emitting surface 12 .
  • the light-emitting surface 12 and the reflective surface 13 are oppositely disposed.
  • the first light-reflecting surface 14 is connected between the light-emitting surface 12 and the light-incident surface 11, and the light-incident surface 11 is connected to the first surface. Between the reflective surface 14 and the reflective surface 13, the light incident surface 11 is for receiving a light source
  • the first light-cut surface 14 and the extended surface of the light-emitting surface 12 form a first cut angle ⁇ 1. As shown in FIG. 2, the portion indicated by the dotted line extending coplanar with the light-emitting surface 12 is the light-emitting portion.
  • the extension surface of the surface 12, that is to say the extension surface of the light-emitting surface 12, is located at the periphery of the light-emitting surface 12 and is coplanar with the light-emitting surface 12.
  • the first chamfer angle ⁇ 1 is an acute angle. Specifically, the value of the first cut angle ⁇ 1 is greater than 0 degrees and is less than or equal to 35 degrees.
  • the light guide plate provided by the present application is provided with a first reflective surface 14 between the light-emitting surface 12 and the light-incident surface 11, and the first cut angle ⁇ 1 formed between the first reflective surface 14 and the extended surface of the light-emitting surface 12 is an acute angle.
  • the first reflective surface 14 is reflected to the first position on the reflective surface 13.
  • the reflective surfaces in FIG. 5 are labeled as P1, P2, and P3, respectively. The three areas are the first position. If there is no first reflective surface 14, the light of the same angle will hit the extended surface of the light-emitting surface 12, as shown in FIG.
  • the extended surface of the light-emitting surface 12 reflects the light to the second position on the reflective surface 13, and reflects The area labeled P on the surface is the second position.
  • the first position is further away from the light entrance surface than the second position. That is to say, by the design of the first reflective surface 14, the light at a position closer to the light source is pulled away, that is, the light on the low beam side of the light guide plate is weakened, so that the light-emitting surface 12 of the light guide plate is The brightness of the light near the side of the light source is weakened, which solves the problem of generating bright lines in the prior art, and is advantageous for improving the display effect of the display device.
  • the light-incident surface 11 and the reflective surface 13 can be directly connected to each other. As shown in FIG. 2, the reflective surface and the light-incident surface have an edge. In other words, in the embodiment, the light guide plate is only adjacent to the light-emitting surface 12 . The edge of the smooth surface 11 is subjected to edging or chamfering to form the first reflective surface 14 between the light-emitting surface 12 and the light-incident surface 11. The light incident surface 11 is perpendicular to the reflective surface 13.
  • a second reflective surface 15 may be disposed between the light incident surface 11 and the reflective surface 13. As shown in FIG. 3, the second reflective surface 15 is connected between the light incident surface 11 and the reflective surface 13. A second chamfered angle ⁇ 2 is formed between the second reflecting surface 15 and the extended surface of the reflecting surface 12, and the second chamfering angle ⁇ 2 is an acute angle. The value of the second cut angle ⁇ 2 is greater than 0 degrees and less than or equal to 35 degrees.
  • the working principle of the second reflecting surface 15 is the same as that of the first reflecting surface 14 , and the light reflected on the second reflecting surface 15 in the light guiding plate is reflected by the second reflecting surface 15 and reflected to the light emitting surface 12 .
  • the reflection of the second reflective surface 15 the light at a position closer to the light source is pulled away, that is, the light on the low beam side of the light guide plate is weakened, so that the light exit surface of the light guide plate is close to the light source.
  • the brightness of the light on one side is weakened, which solves the problem of generating bright lines in the prior art, and is advantageous for improving the display effect of the display device.
  • the second reflective surface 15 and the first reflective surface 14 are symmetrically disposed on both sides of the light incident surface.
  • the second reflective surface 15 and/or the first reflective surface 14 have a planar structure.
  • the flat structure is easy to machine and has a uniform reflection effect.
  • the surfaces of the first reflecting surface 14 and/or the second reflecting surface 15 may be designed to be micro-protrusions as needed, and different reflection effects are realized by the structure of the micro-protrusions.
  • the surface of the first reflecting surface 14 and/or the second reflecting surface 15 may be curved or jagged.
  • the surface of the first reflective surface 14 and/or the second reflective surface 15 is provided with a reflective coating.
  • the reflective coating can increase the reflection of the first reflective surface 14 and/or the second reflective surface 15.
  • FIG. 4 and FIG. 5 respectively illustrate the paths of the light guide plate of the prior art and the light guide plate provided by the present application for conducting three light rays L1 , L2 and L3 , and it can be clearly seen that the present application provides The light guide plate significantly weakens the bright line effect.
  • FIG. 4 after the three light rays L1 , L2 , and L3 emitted by the light source 100 enter the light guide plate, they are concentrated and transmitted in the region labeled P on the reflective surface 13 of the light guide plate, and are reflected by the reflective surface 13 and concentrated on the light exit surface 12 .
  • the upper mark is emitted in the area of L1. Referring to FIG.
  • the area of L1 shown in FIG. 4 is a bright line area. As can be seen from FIG. 5, the light in the L2 area is significantly reduced, and the L2 area is farther from the light source than the distance between the L1 and the light source, L2. The area of the area is also larger than the area of the L1 area.
  • FIG. 6 is a dimension X corresponding to the first reflecting surface 14 of the light guiding plate provided in the present application in the direction of the light emitting surface 12 and a change in the size Y corresponding to the first reflecting surface 14 in the direction of the light incident surface 11
  • Fig. 6 A schematic diagram of the effect of the value size. It can be seen from Fig. 6 that when the angle of the first chamfer angle ⁇ 1 is fixed, the horizontal and vertical length components of the first chamfer angle ⁇ 1 are increased (that is, the size of X or Y is increased), and the peak of the bright line is gradually decreased.
  • FIG. 7 is a graph showing the relationship between the angle of the first cut angle ⁇ 1 of the light guide plate provided by the present application and the peak value of the bright line.
  • Fig. 7 shows that the smaller the value of the first cut angle ⁇ 1 is, the smaller the peak value of the bright line is, that is, the weaker the bright line is, the better the first cut angle ⁇ 1 is in the range of 0-35 degrees.
  • FIG. 8 is a graph showing the relationship between the angle of the first cut angle ⁇ 1 of the light guide plate provided by the present application and the relative light coupling efficiency.
  • the light guide plate provided by the present application can maintain the light coupling efficiency at 90% or more with respect to no cut angle.
  • Figure 8 shows that when the first cut angle ⁇ 1 is in the range of 0-20 degrees, the coupling efficiency can be maintained above 93% with respect to the non-cut angle.

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Abstract

提供了一种导光板，包括入光面（11）、出光面（12）、反射面（13）及第一反光面（14），出光面（12）和反射面（13）相对设置，第一反光面（14）连接在出光面（12）和入光面（11）之间，入光面（11）连接在第一反光面（14）和反射面（13）之间，入光面（11）用于接受光源的光线，第一反光面（14）与出光面（12）的延长面之间形成第一切角，第一切角为锐角，因此，有利于提高显示装置的显示效果。还提供了一种背光模组和显示装置。

Description

导光板、背光模组及显示装置
本申请要求2016年4月25日递交的发明名称为“导光板、背光模组及显示装置”的申请号201610261922.7的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请涉及液晶显示之背光源技术领域，尤其涉及一种导光板和背光模组。
背景技术
现有技术中的背光模组通常为侧边式背光架构，即光源位于导光板的侧边，也就是说导光板的侧面为入光面，导光板的顶面为出光面，通常会在导光板的底面增加反射片，以将更多的光线反射至出光面。但现有技术中的背光模组由于导光板为长方体的板装结构，导光板的侧面通常垂直于顶面和底面，这样，导致位于导光板入光面的一侧的出光面会现明显的亮线，亮线产生的原因是由于距离光源近，且光线经过反射集中在一个区域。亮线的存在导至显示装置的显示效果差。
发明内容
本申请提供一种导光板、背光模组和显示装置，所述导光板的结构设计解决了现有技术中产生亮线的问题，有利于提高显示装置的显示效果。
为了实现上述目的，本申请实施方式提供如下技术方案：
一方面，本申请提供一种导光板，所述导光板包括入光面、出光面、反射面及第一反光面，所述出光面和所述反射面相对设置，所述第一反光面连接在所述出光面和所述入光面之间，所述入光面连接在所述第一反光面和所述反射面之间，所述入光面用于接受光源的光线，所述第一反光面与所述出光面的延 长面之间形成第一切角，所述第一切角为锐角。
其中，所述第一切角的值大于0度具小于等于35度。
其中，所述导光板还包括第二反光面，所述第二反光面连接在所述入光面和所述反射面之间，所述第二反光面与所述反射面之延长面之间形成第二切角，所述第二切角为锐角。
其中，所述第二切角的值大于0度具小于等于35度。
其中，所述第二反光面和所述第一反光面对称设置在所述入光面的两侧。
其中，所述第二反光面和/或所述第一反光面均呈平面状结构。
其中，所述第一反光面和/或所述第二反光面的表面设有反射涂层。
第二方面，本申请还提供一种背光模组，所述背光模组包括上述任意一项所述的导光板和光源，所述光源正对所述导光板之所述入光面。
其中，所述背光模组还包括反射片，所述反射片通过光学胶贴合至所述反射面。
第三方面，本申请还提供一种显示装置，所述显示装置包括所述背光模组。
本申请提供的导光板，通过在出光面和入光面之间设置第一反光面，且第一反光面与出光面的延长面之间形成的第一切角为锐角，使得光线打到第一反光面上后，经过第一反光面反射至反射面上的第一位置，若没有第一反光面，同样角度的光线会打到出光面的延长面上，出光面的延长面再将光线反射至反射面上的第二位置，相比第二位置，第一位置距离入光面的距离更远。也就是说，通过第一反光面的设计，使得距离光源较近的位置处的光线被拉远，也就是消弱了导光板近光侧的光线，使得所述导光板的出光面之靠近光源一侧的光线亮度得到消弱，解决了现有技术中的产生亮线的问题，有利于提高显示装置的显示效果。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施方式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申请的一些实施方式，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 如这些附图获得其他的附图。
图1是本申请一种实施方式提供的导光板的示意图。
图2是本申请一种实施方式提供的导光板之部分示意图。
图3是本申请另一种实施方式提供的导光板之部分示意图。
图4是现有技术的导光板的对三条光线的传导示意图。
图5是本申请提供的导光板对三条光线的传导示意图。
图6是本申请提供的导光板之第一反光面在出光面方向上所对应的尺寸X及第一反光面在入光面方向上所对应的尺寸Y的变化对亮线峰值大小的影响示意图。
图7是本申请提供的导光板之第一切角的角度与亮线峰值大小之间关系的曲线图。
图8是本申请提供的导光板之第一切角的角度与相对耦光效率之间关系的曲线图。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述。
本申请提供一种导光板、背光模组及显示装置，导光板应用在显示装置之背光模组中，能够解决现有技术中的产生亮线的问题，有利于提高显示装置的显示效果。本申请提供的背光模组包括所述的导光板和光源，所述光源正对所述导光板之所述入光面。所述背光模组还包括反射片，所述反射片通过光学胶贴合至所述反射面。
请参阅图1，导光板大体呈长方体板状结构，导光板包括入光面11、出光面12、反射面13及第一反光面14。按图1所示的导光板摆放方式而言，出光面12和反射面13分别为顶面和底面，入光面11为侧面，第一反光面14形成于出光面12的一个边缘处。所述出光面12和所述反射面13相对设置，所述第一反光面14连接在所述出光面12和所述入光面11之间，所述入光面11连接在所述第一反光面14和所述反射面13之间，所述入光面11用于接受光源 的光线，所述第一反光面14与所述出光面12的延长面之间形成第一切角θ1，如图2所示，与出光面12共面的延伸出来的虚线表示的部分就是出光面12的延长面，也就是说出光面12的延长面位于出光面12的外围且与出光面12共面。
所述第一切角θ1为锐角。具体而言，所述第一切角θ1的值大于0度具小于等于35度。
本申请提供的导光板，通过在出光面12和入光面11之间设置第一反光面14，且第一反光面14与出光面12的延长面之间形成的第一切角θ1为锐角，使得光线打到第一反光面14上后，经过第一反光面14反射至反射面13上的第一位置，请参阅图5，图5中的反射面上标号分别为P1、P2及P3的三个区域为第一位置。若没有第一反光面14，同样角度的光线会打到出光面12的延长面上，如图4所示，出光面12的延长面再将光线反射至反射面13上的第二位置，反射面上的标号为P的区域为第二位置。相比第二位置，第一位置距离入光面的距离更远。也就是说，通过第一反光面14的设计，使得距离光源较近的位置处的光线被拉远，也就是消弱了导光板近光侧的光线，使得所述导光板的出光面12之靠近光源一侧的光线亮度得到消弱，解决了现有技术中的产生亮线的问题，有利于提高显示装置的显示效果。
入光面11与反射面13之间可以直接连接，如图2所示，反射面与入光面共同具有一个边缘，也就是说，本实施方式中，导光板只有在出光面12之靠近入光面11的边缘处进行磨边或切角的处理，以在出光面12和入光面11之间形成所述第一反光面14。而入光面11垂直于反射面13。
入光面11和反射面13之间也可以设置第二反光面15，如图3所示，所述第二反光面15连接在所述入光面11和所述反射面13之间，所述第二反光面15与所述反射面12之延长面之间形成第二切角θ2，所述第二切角θ2为锐角。所述第二切角θ2的值大于0度具小于等于35度。
第二反光面15的工作原理与第一反光面14相同，在导光板中反射至第二反光面15上的光线，会经过第二反光面15的反射，且反射至出光面12上的第三位置，如图5所示，标号为P4的区域为第三位置。若没有第二反光面，同样角度的光线会打到反射面13的延长面上(如图4所示)，反射面的延长 面再将光线反射至出光面12上的第四位置，如图4所示，标号为P5的区域为第四位置。相对第四位置，第三位置距离入光面的距离更远。也就是说，通过第二反光面15的反射，使得距离光源较近的位置的光线被拉远，也就是消弱了导光板近光侧的光线，使得所述导光板的出光面之靠近光源一侧的光线亮度得到消弱，解决了现有技术中的产生亮线的问题，有利于提高显示装置的显示效果。
一种实施方式中，所述第二反光面15和所述第一反光面14对称设置在所述入光面的两侧。
一种实施方式中，所述第二反光面15和/或所述第一反光面14均呈平面状结构。平面的结构易于加工，反射效果均匀。其它实施方式中，也可以根据需要将第一反光面14和/或第二反光面15的表面设计微突起，通过微突起的结构实现不同的反射效果。或者将第一反射面14和/或第二反射面15的表面设计呈曲面或锯齿状。
进一步的设计，所述第一反光面14和/或所述第二反光面15的表面设有反射涂层。反射涂层可以增加第一反光面14和/或第二反光面15的反射效果。
请参阅图4和图5，图4和图5分别描述了现有技术的导光板及本申请提供的导光板对三条光线L1、L2及L3传导的路径示意图，很明显能够看出本申请提供的导光板明显削弱了亮线效果。请参阅图4，光源100发出的三条光线L1、L2及L3进入导光板后，集中传导在导光板反射面13上的标号为P的区域中，经过反射面13反射后，集中在出光面12上的标号为L1的区域内射出。请参阅图4，光源100发出的三条光线L1、L2及L3进入导光板后，分别传导至导光板反射面13上标号分别为P1、P2及P3的三个区域中，经过反射面13反射后，P1、P2及P3的三个区域中的光线被传导至出光面12上，其中两条光线之间的距离为L2，另一条光线落在L2区域外。图4所示的L1的区域为亮线区域，从图5可以看出，L2区域中的光线明显减少了，而且，与L1与光源之间的距离相比，L2区域距离光源较远，L2区域的面积也大于L1区域的面积。
图6是本申请提供的导光板之第一反光面14在出光面12方向上所对应的尺寸X及第一反光面14在入光面11方向上所对应的尺寸Y的变化对亮线峰 值大小的影响示意图。从图6可以看出：当第一切角θ1角度大小固定时，增加第一切角θ1水平和垂直长度分量(也就是增加X或Y的尺寸)，亮线峰值逐渐下降。同时也说明了，不同第一切角θ1角度对亮线减缓的趋势不一致，图6中给出了三种不同的第一切角θ1的角度(分别为13.2度、8.6度和7.2度)的实验数据。至于第二反光面15与第二切角θ2与亮线峰值之间的关系，与图6所示的第一反光面14及第一切角θ1与亮线峰值之间的关系相似。
图7是本申请提供的导光板之第一切角θ1的角度与亮线峰值大小之间关系的曲线图。图7表明：第一切角θ1在0-35度区间内时，第一切角θ1的值越小，亮线峰值越小，即削弱亮线越有利。
图8是本申请提供的导光板之第一切角θ1的角度与相对耦光效率之间关系的曲线图。本申请提供的导光板，耦光效率相对无切角时均能保持在90％以上。图8表明：第一切角θ1在0-20度区间内时，耦光效率相对无切角时均能保持在93％以上。
以上所述是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。

Claims (20)

  1. 一种导光板，其特征在于，所述导光板包括入光面、出光面、反射面及第一反光面，所述出光面和所述反射面相对设置，所述第一反光面连接在所述出光面和所述入光面之间，所述入光面连接在所述第一反光面和所述反射面之间，所述入光面用于接受光源的光线，所述第一反光面与所述出光面的延长面之间形成第一切角，所述第一切角为锐角。
  2. 如权利要求1所述的导光板，其特征在于，所述第一切角的值大于0度具小于等于35度。
  3. 如权利要求1所述的导光板，其特征在于，所述导光板还包括第二反光面，所述第二反光面连接在所述入光面和所述反射面之间，所述第二反光面与所述反射面之延长面之间形成第二切角，所述第二切角为锐角。
  4. 如权利要求3所述的导光板，其特征在于，所述第二切角的值大于0度具小于等于35度。
  5. 如权利要求3所述的导光板，其特征在于，所述第二反光面和所述第一反光面对称设置在所述入光面的两侧。
  6. 如权利要求3所述的导光板，其特征在于，所述第二反光面和/或所述第一反光面均呈平面状结构。
  7. 如权利要求3所述的导光板，其特征在于，所述第一反光面和/或所述第二反光面的表面设有反射涂层。
  8. 一种背光模组，其特征在于，所述背光模组导光板和光源，所述导光板包括入光面、出光面、反射面及第一反光面，所述出光面和所述反射面相对设置，所述第一反光面连接在所述出光面和所述入光面之间，所述入光面连接在所述第一反光面和所述反射面之间，所述入光面用于接受光源的光线，所述第一反光面与所述出光面的延长面之间形成第一切角，所述第一切角为锐角，所述光源正对所述导光板之所述入光面。
  9. 如权利要求8所述的背光模组，其特征在于，所述背光模组还包括反射片，所述反射片通过光学胶贴合至所述反射面。
  10. 如权利要求8所述的背光模组，其特征在于，所述导光板还包括第 二反光面，所述第二反光面连接在所述入光面和所述反射面之间，所述第二反光面与所述反射面之延长面之间形成第二切角，所述第二切角为锐角。
  11. 如权利要求10所述的背光模组，其特征在于，所述第二反光面和所述第一反光面对称设置在所述入光面的两侧。
  12. 如权利要求10所述的背光模组，其特征在于，所述第一切角和所述第二切角的值均大于0度具小于等于35度。
  13. 如权利要求10所述的背光模组，其特征在于，所述第二反光面和/或所述第一反光面均呈平面状结构。
  14. 如权利要求10所述的背光模组，其特征在于，所述第一反光面和/或所述第二反光面的表面设有反射涂层。
  15. 一种显示装置，其特征在于，所述显示装置包括背光模组，所述背光模组导光板和光源，所述导光板包括入光面、出光面、反射面及第一反光面，所述出光面和所述反射面相对设置，所述第一反光面连接在所述出光面和所述入光面之间，所述入光面连接在所述第一反光面和所述反射面之间，所述入光面用于接受光源的光线，所述第一反光面与所述出光面的延长面之间形成第一切角，所述第一切角为锐角，所述光源正对所述导光板之所述入光面。
  16. 如权利要求15所述的显示装置，其特征在于，所述导光板还包括第二反光面，所述第二反光面连接在所述入光面和所述反射面之间，所述第二反光面与所述反射面之延长面之间形成第二切角，所述第二切角为锐角。
  17. 如权利要求16所述的显示装置，其特征在于，所述第二反光面和所述第一反光面对称设置在所述入光面的两侧。
  18. 如权利要求16所述的显示装置，其特征在于，所述第一切角和所述第二切角的值均大于0度具小于等于35度。
  19. 如权利要求16所述的显示装置，其特征在于，所述第二反光面和/或所述第一反光面均呈平面状结构。
  20. 如权利要求16所述的显示装置，其特征在于，所述第一反光面和/或所述第二反光面的表面设有反射涂层。
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CN106094097B (zh) * 2016-08-18 2019-04-23 京东方科技集团股份有限公司 导光板及应用其的背光模组、显示装置
CN107561630B (zh) * 2017-09-15 2020-07-24 海信视像科技股份有限公司 背光模组和显示装置
KR102531351B1 (ko) * 2017-11-20 2023-05-11 삼성디스플레이 주식회사 광학 부재 및 이를 포함하는 표시 장치
CN108873150A (zh) * 2018-07-11 2018-11-23 东莞市银泰丰光学科技有限公司 一种微结构玻璃导光板加工工艺
CN111650684A (zh) * 2019-03-04 2020-09-11 光耀科技股份有限公司 导光板
CN110967869B (zh) * 2019-12-13 2022-08-12 京东方科技集团股份有限公司 一种前置光源、使用方法以及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5253089A (en) * 1991-11-07 1993-10-12 Rohm Co., Ltd. Backlighted liquid crystal display unit
CN1936627A (zh) * 2002-08-30 2007-03-28 夏普株式会社 照明装置和显示设备
US20110279748A1 (en) * 2010-05-11 2011-11-17 Panasonic Liquid Crystal Display Co., Ltd. Liquid crystal display device
CN103728769A (zh) * 2012-10-11 2014-04-16 财团法人工业技术研究院 立体显示设备
CN103837994A (zh) * 2012-11-21 2014-06-04 索尼公司 光源装置、显示单元和电子设备
CN104749686A (zh) * 2015-04-02 2015-07-01 苏州胜利精密制造科技股份有限公司 一种复合导光板及其液晶显示模组

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607814B2 (en) * 2006-05-24 2009-10-27 3M Innovative Properties Company Backlight with symmetric wedge shaped light guide input portion with specular reflective surfaces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5253089A (en) * 1991-11-07 1993-10-12 Rohm Co., Ltd. Backlighted liquid crystal display unit
CN1936627A (zh) * 2002-08-30 2007-03-28 夏普株式会社 照明装置和显示设备
US20110279748A1 (en) * 2010-05-11 2011-11-17 Panasonic Liquid Crystal Display Co., Ltd. Liquid crystal display device
CN103728769A (zh) * 2012-10-11 2014-04-16 财团法人工业技术研究院 立体显示设备
CN103837994A (zh) * 2012-11-21 2014-06-04 索尼公司 光源装置、显示单元和电子设备
CN104749686A (zh) * 2015-04-02 2015-07-01 苏州胜利精密制造科技股份有限公司 一种复合导光板及其液晶显示模组

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