WO2012006821A1 - 背光模块及显示装置 - Google Patents

背光模块及显示装置 Download PDF

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Publication number
WO2012006821A1
WO2012006821A1 PCT/CN2010/077551 CN2010077551W WO2012006821A1 WO 2012006821 A1 WO2012006821 A1 WO 2012006821A1 CN 2010077551 W CN2010077551 W CN 2010077551W WO 2012006821 A1 WO2012006821 A1 WO 2012006821A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light source
backlight module
emitting surface
Prior art date
Application number
PCT/CN2010/077551
Other languages
English (en)
French (fr)
Inventor
方林冬
郭仪正
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 US12/995,582 priority Critical patent/US8602603B2/en
Publication of WO2012006821A1 publication Critical patent/WO2012006821A1/zh

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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
    • G02B6/009—Positioning aspects of the light source 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
    • G02B6/0033—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
    • G02B6/0033—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

Definitions

  • the present invention relates to a backlight module and a display device, and more particularly to a backlight module and a display device capable of improving light leakage problems.
  • Liquid crystal displays have been widely used in various electronic products.
  • Most of the liquid crystal displays are backlight type liquid crystal displays, which are composed of a liquid crystal display panel and a backlight module.
  • the backlight module can be divided into a side-light type and a direct-light type according to the incident position of the light source to provide a backlight to the liquid crystal display panel.
  • the existing lateral light-input backlight module guides the light source through the light guide plate, and the light source of the backlight module is disposed on one side of the light guide plate.
  • part of the light may leak from the backlight module, that is, light leakage, which is particularly likely to occur at a position close to the light source, thus seriously affecting the display quality of the liquid crystal display.
  • a main object of the present invention is to provide a display device, the display device comprising: Display panel;
  • the backlight module includes:
  • a light guide plate having a light emitting surface
  • a light source is disposed on a side of the light guide plate, wherein the light source has a light emitting surface, and a predetermined angle is formed between the light emitting surface of the light source and the light emitting surface of the light guiding plate, and the preset angle is less than Or equal to 105 degrees;
  • the backlight module further includes a back frame, and the back frame has an inclined surface of the back frame for setting a light source, and the inclined surface of the back frame and the light emitting surface of the light guide plate have an angle, which is the same as Preset angles.
  • Another object of the present invention is to provide a display device, the display device comprising:
  • the backlight module includes:
  • a light guide plate having a light emitting surface
  • a light source is disposed on a side of the light guide plate, wherein the light source has a light emitting surface, and a predetermined angle is formed between the light emitting surface of the light source and the light emitting surface of the light guiding plate, and the preset angle is less than Or equal to 105 degrees.
  • a further object of the present invention is to provide a backlight module, the backlight module comprising:
  • a light guide plate having a light emitting surface
  • a light source is disposed on a side of the light guide plate, wherein the light source has a light emitting surface, and a predetermined angle is formed between the light emitting surface of the light source and the light emitting surface of the light guiding plate, and the preset angle is less than Or equal to 105 degrees.
  • the light exit surface of the light source is perpendicular to an incident direction when light enters the light guide plate.
  • the light source comprises a light emitting diode chip, and the light emitting surface of the light source is formed on a surface of the light emitting diode chip.
  • the preset angle is determined according to the material of the light guide plate.
  • the material of the light guide plate is polymethyl methacrylate, and the predetermined angle is less than or equal to 95.68 degrees.
  • the material of the light guide plate is polycarbonate, and the preset angle is less than or equal to 101.82 degrees.
  • the back frame has a back frame inclined surface for arranging a light source, and the back frame inclined surface and the light emitting surface of the light guide plate have an angle , the same as the preset angle.
  • the light source is provided with a package holder for tilting the light source.
  • the backplane further includes a backplane inclined surface for arranging a light source, and the inclined surface of the backboard and the light exiting surface of the light guide panel have an angle , the same as the preset angle.
  • the backlight module and the display device of the present invention can change the incident direction of the light incident on the light guide plate by the arrangement of the light source, so as to reduce the problem that the light is leaked from the light guide plate near the light source, thereby improving the light leakage problem of the backlight module, and Ensure the display quality of the display device to which the backlight module is applied.
  • FIG. 1 is a partial cross-sectional view showing a backlight module and a display panel in accordance with a first embodiment of the present invention
  • FIG. 2 is a partial cross-sectional view showing a backlight module in accordance with a first embodiment of the present invention
  • Figure 3 is a partial cross-sectional view showing a backlight module in accordance with a second embodiment of the present invention.
  • Fig. 4 is a partial cross-sectional view showing a backlight module in accordance with a third embodiment of the present invention. detailed description
  • the backlight module 100 of the present embodiment can be, for example, a laterally-lit backlight module that is disposed relative to a display panel 101 (eg, a liquid crystal display panel) to form a display device (eg, a liquid crystal display device).
  • a display panel 101 eg, a liquid crystal display panel
  • the 100 includes a backing plate 110, a light source 120, a light guide plate 130, a reflective layer 140, an optical film 150, and a back frame 160.
  • the light guide plate 130, the reflective layer 140 and the optical film 150 are carried on the back plate 110.
  • the light source 120 can be disposed on one side or opposite sides of the light guide plate 130 for laterally emitting light into the light guide plate 130, and
  • the light guide plate 130 guides the light.
  • the reflective layer 140 is disposed at the bottom of the light guide plate 130 for reflecting light entering the light guide plate 130.
  • the optical film 150 is disposed on the light guide plate 130 to improve the optical effect.
  • the back frame 160 is assembled on the back plate 1 10 to form the backlight module 100.
  • the back sheet 1 10 of the present embodiment is made of an opaque material such as a plasticized material, a metal material or a combination of the above materials.
  • the light source 120 is, for example, a Cold Cathode Fluorescent Lamp (CCFL), a Light Emitting Diode (LED), an Organic Light Emitting Diode (OLED), and an Electro-Luminescence (EL). , Light B ar or any combination of the above.
  • the light source 120 can be, for example, a light strip including a circuit board 102 and a light emitting component 103 (eg, an LED chip), and the circuit board 102 is, for example, a printed circuit board (Printed circuit board (PCB) or Flexible Printed Circuits (FPC), and the light-emitting assembly 103 is disposed on the circuit board 102.
  • the light source 120 has a light-emitting surface 122 for emitting light into the light guide plate 130.
  • the light-emitting surface 122 is preferably a flat surface, which may be formed on the surface of the light-emitting component 103 (such as an LED chip), and the light source 120
  • the light-emitting surface 122 is preferably substantially perpendicular to the direction of the light emitted by the light source 120 (ie, the incident direction when the light enters the light guide plate 130).
  • the light guide plate 130 of the present embodiment is disposed on the back plate 110 and located on one side of the light source 120 to guide the light of the light source 120.
  • the light guide plate 130 is formed by, for example, injection molding.
  • the plate-shaped structure is made of, for example, a photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • the light guide plate 130 may include a light emitting surface 131, a light reflecting surface 132, and a side light incident surface 133.
  • the light-emitting surface 131 is located on the front surface of the light guide plate 130 for allowing light to be emitted from the light guide plate 130 to the display panel 101.
  • the light-reflecting surface 132 is located on the bottom surface of the light guide plate 130 and opposite to the light-emitting surface 131.
  • the light incident surface 133 of the light guide plate 130 is formed on one side or opposite sides of the light guide plate 130, and corresponds to the light exit surface 122 of the light source 120 for allowing the light emitted by the light source 120 to enter the light guide plate 130.
  • the side entrance surface 133 may be substantially perpendicular to the light exit surface 131. There is a preset angle ⁇ between the light-emitting surface 122 of the light source 120 and the light-emitting surface 131 of the light guide plate 130.
  • the predetermined angle ⁇ is preferably less than or equal to 105 degrees.
  • the side incident surface 133 may have, for example, a V-shaped structure (V-Cut), an S-shaped wave structure, or a surface roughening treatment (not shown), thereby improving the incidence efficiency and optical coupling efficiency of the light.
  • the predetermined angle ⁇ between the light-emitting surface 122 of the light source 120 and the light-emitting surface 131 of the light guide plate 130 can be determined according to the material of the light guide plate 130 or the actual optical design to achieve the best optical effect.
  • the predetermined angle ⁇ is preferably less than or equal to 95.68 degrees.
  • the predetermined angle ⁇ is preferably less than or equal to 101.82 degrees.
  • the light guide plate 130 of the embodiment may be provided with a light guiding structure 134 on the light reflecting surface 132 , so that the light emitted by the light source 120 can be guided by the reflection light.
  • the light exit surface 13 1 is emitted, preferably in a forward direction (positive light output).
  • the light guiding structure 134 of the light guide plate 130 is, for example, a continuous V-shaped structure, that is, a V-Cut structure (for example, formed by injection molding or micro-cutting), and a matte structure (for example, using a squirting process) To form a scattering point structure (for example, by screen printing, laser fine processing or integral molding), so that the light entering the light guide plate 130 from the side entrance surface 133 can be sufficiently obtained by the light exit surface 13 1 .
  • the light-emitting surface 13 1 of the light guide plate 130 may also have a matte surface treatment or a scattering point design to uniformize the light output of the light guide plate 130 and reduce the phenomenon of light emission (Mura).
  • the reflective layer 140 of the present embodiment is, for example, a reflective film or a reflective coating having a high reflectivity material for reflecting light traveling to the light reflecting surface 132.
  • the high reflectivity material may be, for example, silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, an alloy of any combination thereof, yellowing resistant and heat resistant.
  • the light reflecting surface 132 of the light guide plate 130 can also coat the high reflectivity material to reflect the incident light, so that the reflective layer 140 can be further replaced and omitted.
  • the optical film 150 of the embodiment may be, for example, a diffusion sheet, a prism sheet, a Turning Prism Sheet, a Brightness s Enhancement Film (BEF), and a reflective brightness enhancing film ( Dual Brightness Enhancement Film (DBEF), Diffu sed Reflective Polarizer Film (DRPF), or any combination thereof, which is disposed on the light-emitting surface 13 1 of the light guide plate 130 for improving the light guide plate. 130 optical effects of light.
  • the back frame 160 of the embodiment can assemble the light source 120 , the light guide plate 130 and the optical film 150 on the back plate 110 , and the back frame 160 can form a closed structure of the lamp cover to avoid light from the light guide plate.
  • the back frame 160 is made of an opaque material such as a plasticized material, a metal material or a combination of the above materials.
  • the back frame 160 may be formed with a chamber 162 formed on one side of the light guide plate 130 for accommodating the light source 120.
  • the inner side wall of the chamber 162 may be coated with a high reflectivity material to make a portion not incident. The incident light of the light guide plate 130 can be reflected again into the light guide plate 130.
  • the back frame 160 may have a back frame inclined surface 164 that forms an inner side wall of the chamber 162 of the back frame 160 and has an angle with the light exit surface 131 of the light guide plate 130 that is the same as the above preset.
  • the angle ⁇ is used to abut and set the light source 120. Therefore, the light source exit surface 122 of the light source 120 and the light exit surface 131 of the light guide plate 130 have the predetermined angle ⁇ through the back frame inclined surface 164 of the back frame 160.
  • FIG. 2 a partial cross-sectional view of a backlight module in accordance with a first embodiment of the present invention is shown.
  • the light source 120 of the backlight module 100 of the present embodiment emits light to the light guide plate 130
  • the light source surface 122 of the light source 120 and the light exit surface 131 of the light guide plate 130 have the predetermined angle ⁇
  • the light source can be changed. 120 enters the incident direction of the light guide plate 130.
  • the light of the light source 120 travels to the light exit surface 131 near the side entrance light surface 133, the light is easily totally reflected at the light exit surface 131 near the side entrance light surface 133, and the light is also near the side light entrance surface 133.
  • the light-emitting surface 131 is not easily ejected, thereby reducing the problem that light is leaked from the light guide plate 130 near the light source 120 to ensure the display quality of the display device to which the backlight module 100 is applied.
  • FIG. 3 a partial cross-sectional view of a backlight module in accordance with a second embodiment of the present invention is shown. Only the differences between the present embodiment and the first embodiment will be described below, and the similarities are not described herein again.
  • the light source 220 of the second embodiment may be provided with a package holder 224 for supporting the light source 220.
  • the package holder 224 can be used to tilt the light source 220 such that the light source surface 222 of the light source 220 and the light exit surface 131 of the light guide plate 130 have the predetermined angle ⁇ .
  • the light source 220 can include, for example, a circuit board 202, a light emitting component 203 (such as an LED chip), the light source emitting surface 222, and the package holder 224.
  • the package holder 224 is, for example, a wedge-shaped holder disposed between the circuit board 202 and the light-emitting assembly 203 for supporting and tilting the light-emitting assembly 203.
  • the light-emitting surface 222 is formed on the surface of the light-emitting assembly 203. Therefore, the light source surface 222 of the light source 220 and the light exit surface 131 of the light guide plate 130 can have the predetermined angle ⁇ by the package holder 224.
  • the back plate 310 of the third embodiment is provided with a back plate inclined surface 312 which is bent and extended by one side of the back plate 310 and can abut against the inner side of the back frame 160.
  • the back plate inclined surface 312 of the back plate 310 has an angle with the light emitting surface 131 of the light guide plate 130, which is the same as the preset angle ⁇ for abutting and disposing on the light source 120. Therefore, the light source exit surface 122 of the light source 120 and the light exit surface 131 of the light guide plate 130 have the predetermined angle ⁇ through the back plate inclined surface 312 of the back plate 310.
  • the backlight module and the display device of the present invention can change the incident direction of light incident on the light guide plate by the arrangement of the light source, so that the light is easily placed.
  • the total reflection occurs at the light-emitting surface of the near-light source, and is not easily emitted, thereby reducing the problem of light leakage from the light guide plate near the light source, improving the light leakage problem of the backlight module, and ensuring the display device applied to the backlight module. Display quality.

Abstract

提供了一种背光模块（100）及显示装置。显示装置包括所述背光模块（100）和显示面板（101）。所述背光模块（100）包括导光板（130）和光源（120），导光板（130）具有出光面（131），光源（120）设置于导光板（130）的一侧，其中光源（120）具有光源出光面（122），光源出光面（122）与导光板（130）的出光面（131）之间具有预设角度。可改善漏光问题。

Description

背光模块及显示装置
技术领域
本发明涉及一种背光模块及显示装置，特别是涉及一种可改 善漏光问题的背光模块及显示装置。 龍
液晶显示器（Liquid Crystal Display , LCD)已被广泛应用于各 种电子产品中， 液晶显示器大部分为背光型液晶显示器， 其是由 液晶显示面板及背光模块（backlight module)所组成。 背光模块可 依照光源入射位置的不同分成侧向式入光（Side-light type)与直 下式入光（Direct-light type)两种， 以便提供背光源至液晶显示面 板。
现有的侧向式入光背光模块是通过导光板来导引光源的光 线， 背光模块的光源是设置于导光板的一侧。 然而， 当光源发出 光线至导光板时， 部分的光线可能会由背光模块外漏， 亦即漏光 情形， 其特别容易发生在靠近光源处的位置， 因而严重地影响液 晶显示器的显示质量。
故， 有必要提供一种背光模块及显示装置， 以解决现有技术 所存在的问题。 发明内容
本发明的主要目的在于提供一种显示装置，所述显示装置包 括: 显示面板； 以及
背光模块， 包括：
导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度；
其中所述背光模块还包括背框，所述背框具有背框倾斜 面， 用以设置光源， 所述背框倾斜面与所述导光板的所述出 光面之间具有一角度， 相同于所述预设角度。
本发明的另一目的在于提供一种显示装置，所述显示装置包 括：
显示面板； 以及
背光模块， 包括：
导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度。
本发明的再一目的在于提供一种背光模块，所述背光模块包 括：
导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度。 在本发明的一实施例中，所述光源的所述光源出光面是垂直 于光线进入于所述导光板时的入射方向。
在本发明的一实施例中， 所述光源包括发光二极管芯片， 所 述光源出光面是形成于所述发光二极管芯片的表面。
在本发明的一实施例中，所述预设角度是依据所述导光板的 材料来决定。
在本发明的一实施例中，所述导光板的材料为聚甲基丙烯酸 甲酯， 所述预设角度是小于或等于 95.68度。
在本发明的一实施例中， 所述导光板的材料为聚碳酸酯， 所 述预设角度是小于或等于 101 .82度。
在本发明的一实施例中， 还包括背框， 所述背框具有背框倾 斜面， 用以设置光源， 所述背框倾斜面与所述导光板的所述出光 面之间具有一角度， 相同于所述预设角度。
在本发明的一实施例中， 所述光源设有封装支架， 用以倾斜 所述光源。
在本发明的一实施例中， 还包括背板， 所述背板具有背板倾 斜面， 用以设置光源， 所述背板倾斜面与所述导光板的所述出光 面之间具有一角度， 相同于所述预设角度。
本发明的背光模块和显示装置可通过光源的配置方式来改 变光线入射于导光板内的入射方向， 以减少光线由光源附近的导 光板外漏的问题， 因而改善背光模块的漏光问题， 并可确保背光 模块所应用的显示装置的显示质量。
为让本发明的上述内容能更明显易懂， 下文特举较佳实施 例， 并配合所附图式， 作详细说明如下 附图说明
图 1 显示依照本发明的第一实施例的背光模块与显示面板 的局部剖面示意图；
图 2 显示依照本发明的第一实施例的背光模块的局部剖面 示意图；
图 3 显示依照本发明的第二实施例的背光模块的局部剖面 示意图； 以及
图 4 显示依据本发明的第三实施例的背光模块的局部剖面 示意图。 具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可 用以实施的特定实施例。 本发明所提到的方向用语， 例如 「上」、 「下」、 「前」、 「后」、 「左」、 「右」、 「内」、 「外」、 「侧面」 等， 仅 是参考附加图式的方向。 因此， 使用的方向用语是用以说明及理 解本发明， 而非用以限制本发明。
在图中， 结构相似的单元是以相同标号表示。
请参照图 1， 其显示依照本发明的第一实施例的背光模块与 显示面板的局部剖面示意图。本实施例的背光模块 100可例如为 侧向式入光的背光模块，其相对于一显示面板 101 (例如液晶显示 面板）来设置， 而形成一显示装置（例如液晶显示装置）。 背光模块 100包括有背板 110、 光源 120、 导光板 130、 反射层 140、 光学 膜片 150及背框 160。 导光板 130、 反射层 140及光学膜片 150 是承载于背板 1 10上， 光源 120可设置于导光板 130的一侧或相 对两侧， 用以侧向发光至导光板 130 内， 并由导光板 130来导引 出光。 反射层 140是设置于导光板 130的底部， 用以反射进入导 光板 130 内的光线。 光学膜片 150是设置于导光板 130上， 以改 善光学效果。 背框 160是组装于背板 1 10上， 以形成此背光模块 100。
如图 1所示， 本实施例的背板 1 10是由不透光材质所制成， 例如： 塑化材料、 金属材料或上述材料的组合。 光源 120例如为 冷阴极灯管（Cold Cathode Fluorescent Lamp , CCFL)、 发光二极 管 (Light Emitting Diode , LED) ^ 有机发光二极管 (Organic Light Emitting Diode , OLED) ^ 电激发光组件 (Electro-Luminescence， EL)、 发光灯条（Light B ar)或上述的任意组合。
如图 1 所示， 在本实施例中， 光源 120 可例如为发光灯条 (Light B ar) , 其包括电路板 102和发光组件 103 (例如 LED芯片）， 电路板 102例如为印刷电路板（Printed circuit board , PCB )或软性 印刷电路板（Flexible Printed Circuits , FPC)， 发光组件 103是设 置电路板 102上。 光源 120具有一光源出光面 122， 用以发出光 线至导光板 130 内， 此光源出光面 122优选为一平面， 其可例如 形成于发光组件 103 (如 LED芯片）的表面， 且此光源 120的光源 出光面 122优选是实质垂直于光源 120所发出的光线方向（亦即 光线进入导光板 130时的入射方向）。 如图 1所示， 本实施例的导光板 130是设置于背板 110上， 并位于光源 120的一侧， 以导引光源 120的光线， 导光板 130例 如是利用射出成型的方式来制成平板形结构， 其材料例如为光硬 化型树脂、 聚甲基丙烯酸甲酯（PMMA)或聚碳酸酯（PC)。 导光板 130可包括有出光面 131、 光反射面 132及侧入光面 133。 出光面 131是位于导光板 130的正面， 用以允许光线由导光板 130发出 至显示面板 101， 光反射面 132是位于导光板 130的底面， 且相 对于出光面 131。导光板 130的侧入光面 133是形成于导光板 130 的一侧或相对两侧， 其对应于光源 120的光源出光面 122， 用以 允许光源 120所发出的光线可进入导光板 130 内， 侧入光面 133 可实质垂直于出光面 131。 其中， 光源 120的光源出光面 122与 导光板 130的出光面 131之间具有一预设角度 Θ ， 此预设角度 Θ 优选是小于或等于 105度。且此侧入光面 133可具有例如 V形结 构（V-Cut)、 S形波浪结构或表面粗糙化处理（未绘示）， 以此提升 光线的入射效率和光耦合效率。
在本实施例中， 光源 120的光源出光面 122与导光板 130的 出光面 131之间的预设角度 Θ 可依据导光板 130的材料或实际光 学设计情形来决定， 以达到最佳的光学效果。 例如， 当导光板 130的材料为聚甲基丙烯酸甲酯（PMMA)时， 此预设角度 Θ 优选 是小于或等于 95.68度。 又例如， 当导光板 130的材料为聚碳酸 酯（PC)时， 此预设角度 Θ 优选是小于或等于 101.82度。
如第 1 图所示， 本实施例的导光板 130可设有导光结构 134 于光反射面 132上， 以此反射导引由光源 120所发出的光线可由 出光面 13 1来射出， 较佳为正向射出（正向出光）。 导光板 130的 导光结构 134例如是呈连续性的 V形结构，亦即 V-Cut结构 （例 如是利用射出成型或微切削成型的方式来形成）、 雾面结构（例如 是利用喷吵处理来形成）、 散射点结构（例如是利用网板印刷、 激 光精细加工或一体成型来形成）， 以此导引由侧入光面 133 进入 导光板 130的光线可充分地由出光面 13 1来射出。
值得注意的是， 导光板 130的出光面 13 1 也可具有雾面处理 或散射点设计， 以此均匀化导光板 130 的出光， 减少出光不均 (Mura)的现象。
如图 1所示， 本实施例的反射层 140例如为反射膜片或反射 涂层， 其具有高反射率材料， 用以反射行进至光反射面 132的光 线。 此高反射率材料可例如为银、 铝、 金、 铬、 铜、 铟、 铱、 镍、 铂、 铼、 铑、 锡、 钽、 钨、 锰、 上述任意组合的合金、 耐黄化且 耐热的白色反射漆料或上述材料的任意组合， 以反射光线。 值得 注意的是，导光板 130的光反射面 132也可涂布此高反射率材料， 以反射入射光线， 因而可进一步取代及省略设置反射层 140。
如图 1所示， 本实施例的光学膜片 150可例如为扩散片、 棱 镜片 、 逆棱镜片（Turning Prism Sheet)、 增亮膜（Brightnes s Enhancement Film， BEF)、 反射式增亮膜 (Dual Brightness Enhancement Film , DBEF)、 非多层膜式反射偏光片（Diffu sed Reflective Polarizer Film , DRPF)或上述的任意组合， 其设置于 导光板 130的出光面 13 1上，用以改善由导光板 130出光的光学 效果。 如图 1所示， 本实施例的背框 160可组装光源 120、 导光板 130及光学膜片 150于背板 110上， 此背框 160可形成密闭结构 的灯罩， 用以避免光线从导光板 130 以外的部分泄漏出去， 其中 背框 160是由不透光材质所制成， 例如塑化材料、 金属材料或上 述材料的组合。背框 160可形成有腔室 162，其形成于导光板 130 的一侧， 用以容置光源 120， 腔室 162的内侧侧壁可涂布有高反 射率材料，用以使一部分未射入导光板 130的入射光可再反射至 导光板 130之中。
在本实施例中， 背框 160可具有背框倾斜面 164， 其形成背 框 160的腔室 162的内侧侧壁， 并与导光板 130的出光面 131之 间具有一角度相同于上述预设角度 Θ ，用以抵接及设置光源 120。 因此， 通过背框 160的背框倾斜面 164， 光源 120的光源出光面 122可与导光板 130的出光面 131之间具有此预设角度 Θ 。
请参照图 2， 其显示依照本发明的第一实施例的背光模块的 局部剖面示意图。当本实施例的背光模块 100的光源 120发出光 线至导光板 130 时， 由于光源 120 的光源出光面 122 与导光板 130的出光面 131之间具有此预设角度 Θ ， 因而可改变光线由光 源 120进入导光板 130的入射方向。 藉此， 当光源 120的光线行 进至侧入光面 133 附近的出光面 131 处时， 光线容易在侧入光面 133 附近的出光面 131 处发生全反射， 亦光线在侧入光面 133 附 近的出光面 131 处不易被射出， 因而减少光线由光源 120附近的 导光板 130外漏的问题， 以确保背光模块 100所应用的显示装置 的显示质量。 请参照图 3， 其显示依照本发明的第二实施例的背光模块的 局部剖面示意图。 以下仅就本实施例与第一实施例间的相异处进 行说明， 而其相似处则在此不再赘述。 相较于第一实施例， 第二 实施例的光源 220可设有封装支架 224，用以支撑承载光源 220。 且此封装支架 224可用以倾斜光源 220， 而使得光源 220的光源 出光面 222与导光板 130的出光面 131之间具有此预设角度 Θ 。 在本实施例中，光源 220可例如包括电路板 202、发光组件 203(如 LED芯片）、 此光源出光面 222及此封装支架 224。 封装支架 224 例如为楔形支架， 其设置于电路板 202和发光组件 203之间， 用 以支撑和倾斜发光组件 203， 此光源出光面 222是形成于发光组 件 203 的表面上。 因此， 通过封装支架 224， 光源 220的光源出 光面 222可与导光板 130的出光面 131之间具有此预设角度 Θ 。
请参照图 4， 其显示依照本发明的第三实施例的背光模块的 局部剖面示意图。 以下仅就本实施例与第一实施例间的相异处进 行说明， 而其相似处则在此不再赘述。 相较于第一实施例， 第三 实施例的背板 310设有背板倾斜面 312， 其是由背板 310的一侧 来倾斜延伸弯折， 并可抵靠于背框 160 的内侧侧壁上。 此背板 310的背板倾斜面 312可与导光板 130的出光面 131之间具有一 角度， 其相同于此预设角度 Θ , 用以抵接及设置于光源 120。 因 此，通过背板 310的背板倾斜面 312，光源 120的光源出光面 122 可与导光板 130的出光面 131之间具有此预设角度 Θ 。
由上述可知， 本发明的背光模块和显示装置可通过光源的配 置方式来改变光线入射于导光板内的入射方向， 使光线容易在靠 近光源的出光面处发生全反射的情形， 而不易射出， 因而可减少 光线由光源附近的导光板外漏的问题， 以改善背光模块的漏光问 题， 并可确保背光模块所应用的显示装置的显示质量。
综上所述， 虽然本发明已以较佳实施例揭露如上， 但上述较 佳实施例并非用以限制本发明， 本领域的普通技术人员， 在不脱 离本发明的精神和范围内， 均可作各种更动与润饰， 因此本发明 的保护范围以权利要求界定的范围为准。

Claims

权 利 要 求
1 .一种显示装置， 其特征在于： 所述显示装置包括： 显示面板； 以及
背光模块， 包括：
导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度；
其中所述背光模块还包括背框， 所述背框具有背框倾斜面， 用以设置光源，所述背框倾斜面与所述导光板的所述出光面之间 具有一角度， 相同于所述预设角度。
2.—种显示装置， 其特征在于： 所述显示装置包括： 显示面板； 以及
背光模块， 包括：
导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度。
3.—种背光模块， 其特征在于： 所述背光模块包括： 导光板， 具有出光面； 以及
光源， 设置于所述导光板的一侧， 其中所述光源具有光源出 光面，所述光源出光面与所述导光板的所述出光面之间具有预设 角度， 所述预设角度是小于或等于 105度。
4.根据权利要求 3所述的背光模块， 其特征在于： 所述光源 的所述光源出光面是垂直于光线进入于所述导光板时的入射方 向。
5.根据权利要求 3所述的背光模块， 其特征在于： 所述光源 包括发光二极管芯片，所述光源出光面是形成于所述发光二极管 芯片的表面。
6.根据权利要求 3所述的背光模块， 其特征在于： 所述预设 角度是依据所述导光板的材料来决定。
7.根据权利要求 6所述的背光模块， 其特征在于： 所述导光 板的材料为聚甲基丙烯酸甲酯， 所述预设角度是小于或等于 95.68度。
8.根据权利要求 6所述的背光模块， 其特征在于： 所述导光 板的材料为聚碳酸酯， 所述预设角度是小于或等于 101 .82度。
9.根据权利要求 3所述的背光模块， 其特征在于： 还包括背 框， 所述背框具有背框倾斜面， 用以设置光源， 所述背框倾斜面 与所述导光板的所述出光面之间具有一角度，相同于所述预设角 度。
10.根据权利要求 3 所述的背光模块， 其特征在于： 所述光 源设有封装支架， 用以倾斜所述光源。
11 .根据权利要求 3 所述的背光模块， 其特征在于： 还包括 背板， 所述背板具有背板倾斜面， 用以设置光源， 所述背板倾斜 面与所述导光板的所述出光面之间具有一角度，相同于所述预设 角度。
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