WO2016173014A1 - 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
WO2016173014A1
WO2016173014A1 PCT/CN2015/079458 CN2015079458W WO2016173014A1 WO 2016173014 A1 WO2016173014 A1 WO 2016173014A1 CN 2015079458 W CN2015079458 W CN 2015079458W WO 2016173014 A1 WO2016173014 A1 WO 2016173014A1
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WO
WIPO (PCT)
Prior art keywords
light
plate
guide plate
light guide
incident surface
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Ceased
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PCT/CN2015/079458
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English (en)
French (fr)
Inventor
张彦学
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US14/758,231 priority Critical patent/US9703034B2/en
Publication of WO2016173014A1 publication Critical patent/WO2016173014A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • G02B6/009—Positioning aspects of the light source 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
    • G02F1/1335—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
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a light guide plate, a backlight module, and a display device.
  • liquid crystal display devices have been widely used in various electronic products as display components of electronic devices. With the development of thin and light electronic products, display devices of electronic devices are increasingly required.
  • the backlight module is an important component in the liquid crystal display device, and the functional performance requirements of the backlight module are also higher and higher.
  • the backlight module of the prior art comprises a plastic frame, the light guide plate is surrounded by the plastic frame, and the optical film is fixed on the light guide plate and the plastic frame by the light shielding tape; the back plate and the LED lamp disposed around the plastic frame shown Source and shading tape.
  • the light guide plate is an important part of the backlight module.
  • the LED light source of the backlight module enters the light guide plate through the light entering side, a part of the light source of the LED light is emitted from the bottom of the LED light and does not enter the light guide plate, thereby causing waste of light and reducing the LED light.
  • the utilization of the light source since the LED light source of the backlight module enters the light guide plate through the light entering side, a part of the light source of the LED light is emitted from the bottom of the LED light and does not enter the light guide plate, thereby causing waste of light and reducing the LED light. The utilization of the light source.
  • the object of the present invention is to provide a light guide plate, which reduces the waste of the light source and solves the technical problem of light leakage at the bottom of the LED light source.
  • the invention also provides a backlight module and a display device.
  • the present invention provides a light guide plate, the light guide plate includes a body and an extension plate, and the body includes a light incident surface, a light exit surface adjacent to the light incident surface, and a bottom surface opposite to the light exit surface, the extension
  • the plate is formed by a direction in which the side of the light incident surface is parallel and away from the body.
  • the extension plate includes a light-filling surface, the light-filling surface is disposed perpendicular to the light-incident surface, or the light-filling surface and the light-incident surface are disposed at an acute angle.
  • the extension plate further includes a bottom surface disposed opposite to the light-filling surface, the bottom surface of the extension plate is oriented in the same direction as the bottom surface of the body, and the bottom surface of the extension plate is stepped with the bottom surface of the body, thereby A recess is formed on the bottom of the light guide plate.
  • the present invention also provides a backlight module, the backlight module includes a back plate, a plastic frame, a light source, an optical film, and a light guide plate.
  • the plastic frame, the light guide plate, the light source, and the optical film are disposed on the backlight module.
  • the optical film is stacked on the light-emitting surface of the light guide plate in the back plate;
  • the light guide plate includes a body and an extension plate, and the body includes a light incident surface, a light emitting surface adjacent to the light incident surface, and a bottom surface opposite to the light emitting surface, wherein the extending plate is configured by the light incident surface Forming a side parallel and away from the body;
  • the plastic frame is disposed around the light guide plate, the light source and the optical film, the light source is disposed toward the light incident surface, and the light source is located above the extension plate, the optical film and the optical film
  • the light guide plate is stacked.
  • the extension plate includes a light-filling surface, the light-filling surface is disposed perpendicular to the light-incident surface, or the light-filling surface and the light-incident surface are disposed at an acute angle.
  • the light source includes a fixing portion and a light emitting portion disposed on the fixing portion, and the light emitting portion is located on a light incident surface side of the light guide plate and above the light filling surface.
  • the bottom surface of the extension plate is disposed in a stepped manner with the bottom surface of the body, and the concave portion is formed on the bottom surface of the body.
  • the backlight module further includes a reflective sheet, and the reflective sheet is received in the concave portion.
  • the backboard includes a bottom plate and a side plate disposed around the bottom plate.
  • the rubber frame is disposed on the bottom plate along the side plate, and the light guide plate is mounted on the bottom plate, and the extension plate is away from the light incident surface.
  • the end portion is in contact with the plastic frame, and the retroreflective sheeting is sealed in the recess by the bottom plate.
  • the present invention provides a display device including the backlight module and the display panel, and the display panel is mounted on the backlight module and fixed to the back plate.
  • the display panel and the periphery of the optical film and the back plate are fixed by double-sided tape.
  • the light guide plate of the backlight module of the present invention is provided with an extension plate on a side of the light incident surface, and the light source is disposed in a space between the extension plate and the light incident surface, and the light of the light leakage portion of the light source passes through the extension plate to enter the guide.
  • the light board makes full use of the light source to avoid waste of the light source and improve the utilization of the light source.
  • FIG. 1 is a schematic structural view of a light guide plate according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a display device having a backlight module of the present invention.
  • a preferred embodiment of the present invention provides a light guide plate 10 , a backlight module having the light guide plate 10 , and a display device.
  • the display device includes the backlight module and the display panel 30.
  • the display panel covers the backlight module and is fixed to the back plate of the backlight module.
  • the light guide plate is used for adjusting and outputting light of the backlight module.
  • the light guide plate 10 includes a body 11 and an extension plate 12 .
  • the body 11 includes a light incident surface 111 , a light exit surface 112 adjacent to the light incident surface 111 , and a bottom surface 113 opposite to the light exit surface 112 .
  • the extension plate 12 is formed by the side of the light incident surface 111 being parallel and extending away from the body 11 .
  • the body 11 is a rectangular plate body.
  • the extension plate 12 is a strip plate on one side of the light guide plate, and is integrally formed with the light guide plate 10.
  • the extension plate 12 includes a light-filling surface 121 , the light-filling surface 121 is disposed perpendicular to the light-incident surface 111 , or the light-filling surface 121 and the light-incident surface 111 are disposed at an acute angle.
  • the light-filling surface 121 of the extension plate 12 is disposed perpendicular to the light-incident surface 111, that is, the extension plate 12 is disposed perpendicular to the light-incident surface 111.
  • the light-filling surface 121 and the light-incident surface 111 are disposed at an acute angle.
  • the extension plate 12 further includes a bottom surface 122 opposite to the light-filling surface 121.
  • the bottom surface 122 of the extension plate 12 faces the same as the bottom surface 112 of the body 11, and the bottom surface 122 of the extension plate 12
  • the bottom surface 112 of the body 11 is disposed in a stepped manner, and a recess 113 is formed on the bottom of the light guide plate 10.
  • the bottom surface 122 of the extension panel 12 has a plane height greater than the height of the bottom surface 112 of the body 11.
  • the recess 113 is formed on the bottom surface 112 of the body 11.
  • the backlight module includes a back plate 21 , a plastic frame 22 , a light source 23 , and an optical film 24 .
  • the plastic frame 22 , the light guide plate 10 , the light source 23 , and the optical film 24 are disposed in the back plate 21 , and the optical film 24 is stacked on the light emitting surface 112 of the light guide plate 10 .
  • the plastic frame 22 is disposed around the light guide plate 10, the light source 23 and the optical film 24, the light source 23 is disposed toward the light incident surface 112, and the light source 23 is located at the extension of the extension plate 12. Above the smooth surface 121, the optical film 24 and the light guide plate 10 are stacked.
  • the back plate 21 includes a bottom plate 211 and a side plate 212 disposed around the bottom plate 211.
  • the bottom plate 211 and the side plate 212 enclose a receiving space for receiving the plastic frame 22 , the light guide plate 10 , the light source 23 , and the optical film 24 .
  • the light guide plate 10 and the bottom plate 211 are stacked.
  • a reflective sheet 25 is disposed between the bottom plate 21 and the light guide plate 10.
  • the end of the extension plate 12 away from the light-incident surface is in abutment with the plastic frame 22, and does not occupy the space of the backlight film group, and the reflective sheet 25 is sealed by the bottom plate in the concave portion.
  • the light guide plate 25 of the present invention is sealed in the recess by the bottom plate to reduce the overall thickness of the backlight module.
  • the light source 23 is disposed between the light incident surface 111 of the light guide plate 10 and the plastic frame 22, and the light source 23 includes a fixing portion 231 and a light emitting portion disposed on the fixing portion 231. 232.
  • the light emitting portion 232 is located on a light incident surface 111 side of the light guide plate 10 and above the light fill surface 121.
  • the light-filling surface 121 of the extension plate 12 is disposed perpendicular to the light-incident surface 111.
  • the light guide plate 10 emits light and then emits light from the light exit surface 112 to provide a light source for the backlight module; at the same time, a small amount of light is exposed from the bottom of the light emitting portion 232, that is, toward the bottom plate side of the back plate, and the light passes through.
  • the light-filling surface 121 of the extension plate 12 enters the light guide plate 10 and is refracted in the light guide plate 10 to be emitted from the light-emitting surface 112.
  • the light-filling surface 121 and the light-incident surface 111 are disposed at an acute angle, that is, the light-filling surface 121 is inclined with respect to the light-incident surface 111; not only the light leaking from the bottom of the light-emitting portion 232
  • the light-receiving surface 121 of the extension plate 12 enters the light guide plate 10, and the light leakage from the side of the light-incident surface 111 is inclined toward the light-incident surface 111, and is also illuminated.
  • the portion is inclined, and the light leakage from the side facing the light incident surface 111 can be similarly collected into the light guide plate 10.
  • the optical film 24 may be provided in various types of stacked layers, such as a diffusion sheet, a prism sheet, a polarizer, and the like.
  • the optical film 24 is fixed to the light source 23 and the side plate 212 by the double-sided tape 26.
  • the double-sided tape 26 is attached to the peripheral edge of the optical film 24 and the end surface of the side plate 212 to fix the optical
  • the diaphragm 24 is on the backing plate 21.
  • the display panel is covered on the backlight module, and the display panel is fixed to the periphery of the optical film and the back plate by double-sided tape.
  • the light guide plate of the backlight module of the present invention is provided with an extension plate on a side of the light incident surface, and the light source is disposed in a space between the extension plate and the light incident surface, and the light of the light leakage portion of the light source passes through the extension plate to enter the guide.
  • the light board makes full use of the light source to avoid waste of the light source and improve the utilization of the light source.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Planar Illumination Modules (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)

Abstract

一种具有导光板(10)的背光模组及显示装置，所述导光板(10)包括本体(11)及延伸板(12)，所述本体(11)包括入光面(111)、与所述入光面(111)相邻的出光面 (112)以及与所述出光面(112)相对的底面，所述延伸板(12)由所述入光面(111)一侧平行且远离所述本体(11)的方向延伸形成。

Description

导光板、背光模组及显示装置
本发明要求2015年4月28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201510214650.0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
本发明涉及液晶显示技术领域，特别涉及一种导光板、背光模组及显示装置。
背景技术
目前，液晶显示装置作为电子设备的显示部件已经广泛的应用于各种电子产品中，随着电子产品轻薄化的发展，电子设备的显示装置要求越来越高。而背光模组则是液晶显示装置中的一个重要部件，背光模组的功能性能要求也越来越高。
现有技术中的背光模组均包括胶框，导光板被胶框包围，光学膜片通过遮光胶带固定于所述导光板和胶框上；设置于所示胶框周围的背板、LED灯源以及遮光胶带。导光板是背光模组的重要组成部分。但是，由于上述背光模组的LED光源经入光侧进入导光板的光线，LED灯的光源会有一部分从LED灯底部射出并未进入所述导光板，从而造成光线的浪费，降低了LED灯光源的利用率。
发明内容
本发明的目的在于提供一种导光板，减少光源的浪费，用以解决LED灯光源底部漏光的技术问题。
本发明还提供一种背光模组及显示装置。
本发明提供一种导光板，所述导光板包括本体及延伸板，所述本体包括入光面、与所述入光面相邻的出光面以及与所述出光面相对的底面，所述延伸板由所述入光面一侧平行且远离所述本体的方向延伸形成。
其中，所述延伸板包括补光面，所述补光面与所述入光面垂直设置，或者所述补光面与所述入光面呈锐角设置。
其中，所述延伸板还包括与补光面相反设置的底面，所述延伸板的底面与所述本体的底面朝向相同，所述延伸板的底面与所述本体的底面呈阶梯设置，进而使所述导光板的的底部上形成凹部。
本发明还提供一种背光模组，所述背光模组包括背板、胶框、灯源及光学膜片以及导光板，所述胶框、导光板、灯源、光学膜片设置于所述背板内，所述光学膜片叠设于所述导光板的出光面上；
所述导光板包括本体及延伸板，所述本体包括入光面、与所述入光面相邻的出光面以及与所述出光面相对的底面，所述延伸板由所述入光面一侧平行且远离所述本体的方向延伸形成；
所述胶框围绕所述导光板、灯源及光学膜片设置，所述灯源朝向所述入光面设置，并且所述灯源位于所述延伸板的上方，所述光学膜片与所述导光板层叠设置。
其中，所述延伸板包括补光面，所述补光面与所述入光面垂直设置，或者所述补光面与所述入光面呈锐角设置。
其中，所述灯源包括固定部及设于固定部上的发光部，所述发光部位于所述导光板的入光面一侧且位于所述补光面上方。
其中，所述延伸板的底面与所述本体的底面呈阶梯设置，进而使所述本体的底面上形成凹部，所述背光模组还包括反光片，所述反光片收容于所述凹部内。
其中，所述背板包括底板及围绕底板设置的侧板，所述胶框设于所述底板上沿着侧板设置，所述导光板装设于底板上，所述延伸板远离入光面的端部与所述胶框抵持，并且所述反光片被底板封于所述凹部内。
本发明提供一种显示装置，所述显示装置包括以上所述背光模组和显示面板，所述显示面板盖于所述背光模组上并与所述背板固定。
其中，所述显示面板与所述光学膜片周缘及背板之间通过双面胶固定。
本发明的背光模组的导光板在入光面一侧设置延伸板，灯源设于延伸板与所述入光面之间的空间内，灯源的可漏光部位的光线经过延伸板进入导光板，充分利用光源，避免光源的浪费，提高灯源的利用率。
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是本发明实施例的导光板的结构示意图。
图2是本发明的具有背光模组的显示装置的截面示意图。
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作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1，本发明佳实施方式提供一种导光板10、具有所述导光板10的背光模组及显示装置。所述显示装置包括所述背光模组和显示面板30，所述显示面板盖于所述背光模组上并与背光模组的背板固定。所述导光板用于背光模组的光线的调整及输出。
本实施例中，所述导光板10包括本体11及延伸板12。所述本体11包括入光面111、与所述入光面111相邻的出光面112以及与所述出光面112相对的底面113。所述延伸板12由所述入光面111一侧平行且远离所述本体11延伸形成。
本实施例中，所述本体11为矩形板体。所述延伸板12为导光板一侧的条形板，且与所述导光板10一体成型。所述延伸板12包括补光面121，所述补光面121与所述入光面111垂直设置，或者所述补光面121与所述入光面111呈锐角设置。本实施例中，所述延伸板12补光面121与所述入光面111垂直设置，即所述延伸板12与所述入光面111垂直设置。在其它实施方式中，所述补光面121与所述入光面111呈锐角设置。
本实施例中，所述延伸板12还包括与补光面121相反设置的底面122，所述延伸板12的底面122与所述本体11的底面112朝向相同，所述延伸板12的底面122与所述本体11的底面112呈阶梯设置，进而使所述导光板10的底部上形成凹部113。所述所述延伸板12的底面122所在平面高度大于所述本体11的底面112的高度，所述凹部113形成于所述本体11的底面112上。
请参阅图2，本实施例中，所述背光模组包括背板21、胶框22、灯源23及光学膜片24。所述胶框22、导光板10、灯源23及光学膜片24设置于所述背板21内，所述光学膜片24叠设于所述导光板10的出光面112上。所述胶框22围绕所述导光板10、灯源23及光学膜片24设置，所述灯源23朝向所述入光面112设置，并且所述灯源23位于所述延伸板12的补光面121上方，所述光学膜片24与所述导光板10层叠设置。
所述背板21包括底板211及围绕底板211设置的侧板212。所述底板211与所述侧板212围成收容空间，用以收容所述胶框22、导光板10、灯源23及光学膜片24。所述导光板10与所述底板211层叠设置。所述底板21与所述导光板10之间设有反光片25。本实施例中，所述延伸板12远离入光面的端部与所述胶框22抵持，并不会占用背光膜组高度的空间，并且所述反光片25被底板封于所述凹部内，相较于现有技术中的导光板与发光片叠加设置，本发明的反光片25被底板封于所述凹部内减小了背光模组的整体厚度。
本实施例中，所述灯源23设于所述导光板10的入光面111与所述胶框22之间，所述灯源23包括固定部231及设于固定部231上的发光部232，所述发光部232位于所述导光板10的入光面111一侧且位于所述补光面121上方。
本实施例中，所述延伸板12补光面121与所述入光面111垂直设置，当所述灯源23的发光部232工作发出光线时，大部分光线会通过所述入光面进入所述导光板10内进行导光后从出光面112射出，为背光模组提供光源；同时会有少部分光线会从发光部232底部，即朝向背板的底板一侧露出，这部分光通过所述延伸板12的补光面121进入所述导光板10内，经过导光板10内的折射后从所述出光面112射出，如此减少了光线的浪费，提高了灯源23的利用率。在其它实施方式中，所述补光面121与所述入光面111呈锐角设置，即所述补光面121相对所述入光面111倾斜；不仅是所述发光部232底部漏出的光线会通过所述延伸板12的补光面121进入所述导光板10内，而且背向所述入光面111一侧的漏光因为补光面121相对所述入光面111倾斜，同样向发光部倾斜，进而同样可以将背向所述入光面111一侧的漏光收入导光板10。
本实施例中，所述光学膜片24可以为多种类型的层叠设置，例如扩散片、棱镜片、偏光片等。所述光学膜片24通过双面胶26与灯源23及侧板212固定。所述双面胶26贴于光学膜片24的周缘、侧板212端面上，进而固定所述光学 膜片24于背板21上。
本实施例中，所述显示面板盖于所述背光模组上并且所述显示面板与所述光学膜片周缘及背板之间通过双面胶固定。
本发明的背光模组的导光板在入光面一侧设置延伸板，灯源设于延伸板与所述入光面之间的空间内，灯源的可漏光部位的光线经过延伸板进入导光板，充分利用光源，避免光源的浪费，提高灯源的利用率。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (14)

  1. 一种导光板，其中，所述导光板包括本体及延伸板，所述本体包括入光面、与所述入光面相邻的出光面以及与所述出光面相对的底面，所述延伸板由所述入光面一侧平行且远离所述本体的方向延伸形成。
  2. 如权利要求1所述的导光板，其中，所述延伸板包括补光面，所述补光面与所述入光面垂直设置，或者所述补光面与所述入光面呈锐角设置。
  3. 如权利要求1所述的导光板，其中，所述延伸板还包括与补光面相反设置的底面，所述延伸板的底面与所述本体的底面朝向相同，所述延伸板的底面与所述本体的底面呈阶梯设置，进而使所述导光板的的底部上形成凹部。
  4. 一种背光模组，其中，所述背光模组包括背板、胶框、灯源及光学膜片以及导光板，所述胶框、导光板、灯源、光学膜片设置于所述背板内，所述光学膜片叠设于所述导光板的出光面上；
    所述导光板包括本体及延伸板，所述本体包括入光面、与所述入光面相邻的出光面以及与所述出光面相对的底面，所述延伸板由所述入光面一侧平行且远离所述本体的方向延伸形成；
    所述胶框围绕所述导光板、灯源及光学膜片设置，所述灯源朝向所述入光面设置，并且所述灯源位于所述延伸板的上方，所述光学膜片与所述导光板层叠设置。
  5. 如权利要求4所述的背光模组，其中，所述延伸板包括补光面，所述补光面与所述入光面垂直设置，或者所述补光面与所述入光面呈锐角设置。
  6. 如权利要求4所述的背光模组，其中，所述灯源包括固定部及设于固定部上的发光部，所述发光部位于所述导光板的入光面一侧且位于所述补光面上方。
  7. 如权利要求5所述的背光模组，其中，所述延伸板的底面与所述本体的底面呈阶梯设置，进而使所述本体的底面上形成凹部，所述背光模组还包括反光片，所述反光片收容于所述凹部内。
  8. 如权利要求7所述的背光模组，其中，所述背板包括底板及围绕底板设置的侧板，所述胶框设于所述底板上沿着侧板设置，所述导光板装设于底板上，所述延伸板远离入光面的端部与所述胶框抵持，并且所述反光片被底板封于所 述凹部内。
  9. 一种显示装置，所述显示装置包括背光模组和显示面板，其中，所述背光模组包括背板、胶框、灯源及光学膜片以及导光板，所述胶框、导光板、灯源、光学膜片设置于所述背板内，所述光学膜片叠设于所述导光板的出光面上；
    所述导光板包括本体及延伸板，所述本体包括入光面、与所述入光面相邻的出光面以及与所述出光面相对的底面，所述延伸板由所述入光面一侧平行且远离所述本体的方向延伸形成；
    所述胶框围绕所述导光板、灯源及光学膜片设置，所述灯源朝向所述入光面设置，并且所述灯源位于所述延伸板的上方，所述光学膜片与所述导光板层叠设置；
    所述显示面板盖于所述背光模组上并与所述背板固定。
  10. 如权利要求9所述的显示装置，其中，所述延伸板包括补光面，所述补光面与所述入光面垂直设置，或者所述补光面与所述入光面呈锐角设置。
  11. 如权利要求9所述的显示装置，其中，所述灯源包括固定部及设于固定部上的发光部，所述发光部位于所述导光板的入光面一侧且位于所述补光面上方。
  12. 如权利要求10所述的显示装置，其中，所述延伸板的底面与所述本体的底面呈阶梯设置，进而使所述本体的底面上形成凹部，所述背光模组还包括反光片，所述反光片收容于所述凹部内。
  13. 如权利要求12所述的显示装置，其中，所述背板包括底板及围绕底板设置的侧板，所述胶框设于所述底板上沿着侧板设置，所述导光板装设于底板上，所述延伸板远离入光面的端部与所述胶框抵持，并且所述反光片被底板封于所述凹部内。
  14. 如权利要求9所述的显示装置，其中，所述显示面板与所述光学膜片周缘及背板之间通过双面胶固定。
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