WO2012062009A1 - 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
WO2012062009A1
WO2012062009A1 PCT/CN2010/079828 CN2010079828W WO2012062009A1 WO 2012062009 A1 WO2012062009 A1 WO 2012062009A1 CN 2010079828 W CN2010079828 W CN 2010079828W WO 2012062009 A1 WO2012062009 A1 WO 2012062009A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
backlight module
light guide
housing
Prior art date
Application number
PCT/CN2010/079828
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English (en)
French (fr)
Inventor
贺成明
张彦学
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.)
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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 US13/000,318 priority Critical patent/US20120113674A1/en
Publication of WO2012062009A1 publication Critical patent/WO2012062009A1/zh

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    • 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

Definitions

  • the present invention relates to a backlight module and a display device, and more particularly to a backlight module and a display device for laterally entering light.
  • Liquid crystal display (Liquid Crystal Display, LCD) has been widely used in a variety of electronic products, most of the liquid crystal display is a backlight type liquid crystal display, which is composed of a liquid crystal display panel and a backlight module (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 (Direct-light) Type) Two to provide a backlight to the LCD panel.
  • Direct-light Direct-light
  • the liquid crystal display panel of the liquid crystal display is supported by a plastic frame on the backlight module, and a front frame is used to assemble the liquid crystal display panel on the backlight module.
  • this assembly method requires a lot of manpower and time, and requires more parts (plastic frame and front frame) for assembly, thereby increasing the assembly cost, labor and time of the liquid crystal display.
  • a main object of the present invention is to provide a backlight module, where the backlight module includes:
  • a housing having a latching extension, the tab extension being formed on at least one side of the housing;
  • the light guide plate has a light emitting surface and at least one positioning convex portion, the positioning convex portion protrudes from the light emitting surface, and the card extension portion covers at least Jamming the positioning protrusion;
  • the light source is disposed on at least one side of the light guide plate.
  • Another object of the present invention is to provide a display device, the display device comprising:
  • the backlight module includes:
  • a housing having a latching extension, the tab extension being formed on at least one side of the housing;
  • the light guide plate has a light emitting surface and a positioning convex portion, the positioning convex portion protrudes from the light emitting surface, and the card extension portion is at least covered and jammed Abutting the positioning protrusion, the display panel is placed on a light emitting surface of the light guide plate;
  • the light source is disposed on at least one side of the light guide plate.
  • the positioning protrusion has a latching recess for latching the display panel.
  • the backlight module further includes an optical film disposed on the light emitting surface of the light guide plate and locked in the latching groove of the positioning convex portion.
  • the latching extension of the housing extends out of the positioning protrusion for abutting against the display panel.
  • the height of the light source is equal to or smaller than the distance between the light emitting surface of the light guide plate and the light reflecting surface.
  • the backlight module further includes a reflective layer that forms a light reflecting surface of the light guiding plate and a surface of the positioning convex portion, and exposes a side light incident surface and a light emitting surface of the light guiding plate. surface.
  • the light guide plate is fixed in the housing by means of screwing or snapping.
  • the two positioning protrusions are formed on both sides of the light guide plate.
  • the height of the positioning protrusion is greater than the sum of the thicknesses of the display panel and the at least one optical film.
  • the display panel of the present invention can be easily and quickly positioned or inserted on the backlight module through the positioning convex portion of the light guide plate, thereby greatly simplifying the display.
  • the assembly structure and assembly process of the device and save the assembly time and overall cost of the display device.
  • the backlight module and the display device of the present invention can easily and quickly assemble the display panel on the backlight module through the positioning convex portion of the light guide plate.
  • the invention can simplify the assembly structure and the assembly process of the display device, thereby greatly saving assembly time and overall cost of the display device.
  • FIG. 1 is a cross-sectional view showing a backlight module and a display panel in accordance with a first embodiment of the present invention
  • Figure 2 shows a perspective view of a housing in accordance with a first embodiment of the present invention
  • FIG. 3 is a perspective view showing a light guide plate according to a first embodiment of the present invention.
  • FIG. 4 is a schematic view showing a backlight module and a display panel in accordance with a second embodiment of the present invention.
  • Figure 5 is a perspective view showing a light guide plate according to a second embodiment of the present invention.
  • FIGS. 6 and 7 are schematic cross-sectional views showing a backlight module and a display panel in accordance with a third embodiment of the present invention.
  • FIG. 1 is a schematic diagram showing a backlight module and a display panel according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing a housing according to a first embodiment of the present invention
  • 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).
  • the backlight module 100 includes a housing 110, at least one light source 120, a light guide plate 130, a reflective layer 140, and an optical film 150.
  • the housing 110 is configured to mount the light source 120, the light guide plate 130, the reflective layer 140, and the optical film 150.
  • the at least one light source 120 is disposed on at least one side of the light guide plate 130 for laterally emitting light into the light guide plate 130, and is guided by the light guide plate 130 to emit light.
  • the reflective layer 140 can be formed between the housing 110 and the light guide plate 130 for reflecting the light of the light source 120.
  • the optical film 150 is disposed on the light guide plate 130 to improve the optical effect.
  • the housing 110 of the present embodiment is made of an opaque material, such as a plastic material, a metal material, or a combination thereof.
  • the housing 110 has a latching extension 111 that extends from one side of the housing 110 for latching and assembling the light guide plate 130 within the housing 110.
  • the light source 120 of this embodiment is, for example, a cold cathode fluorescent lamp (Cold Cathode Fluorescent). Lamp, CCFL), Light Emitting Diode (LED), Organic Light Emitting (Organic Light Emitting) Diode, OLED), Electro-Luminescence (EL), Light Bar, or any combination of the above.
  • Lamp CCFL
  • Light Emitting Diode LED
  • Organic Light Emitting Organic Light Emitting
  • OLED Organic Light Emitting
  • EL Electro-Luminescence
  • Light Bar or any combination of the above.
  • the light source 120 can be, for example, a light strip, which can include a circuit board and a light assembly (for example, LED die), the circuit board is, for example, a printed circuit board (PCB) or a flexible printed circuit board (Flexible Printed) Circuits, FPC), the lighting components are set on the circuit board.
  • a light strip which can include a circuit board and a light assembly (for example, LED die)
  • the circuit board is, for example, a printed circuit board (PCB) or a flexible printed circuit board (Flexible Printed) Circuits, FPC)
  • the lighting components are set on the circuit board.
  • the light guide plate 130 of the present embodiment is, for example, injection molded (Injection). Molding) is made of a material such as a photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC) for guiding the light of the light source 120 to the liquid crystal display panel 101.
  • the light guide plate 130 has a light emitting surface 131, a light reflecting surface 132, at least one positioning convex portion 133, and a side light incident surface 134.
  • the light-emitting surface 131 is formed on one side of the light guide plate 130 and faces the liquid crystal display panel 101.
  • the light-emitting surface 131 may have a matte surface treatment or a scattering point design to uniformize the light output of the light guide plate 130 to reduce uneven light emission (Mura). The phenomenon.
  • the light-emitting surface 131 may be provided with a plurality of protruding structures (not shown) to further correct the direction of the light to increase the light collecting effect and improve the front luminance.
  • the protruding structures may be, for example, prismatic or semi-circular convex or concave structures.
  • the light reflecting surface 132 is opposite to the other side of the light guiding plate 130 for reflecting light to the light emitting surface 131. In the embodiment, the light reflecting surface 132 of the light guide plate 130 is parallel to the light emitting surface 131.
  • the light reflecting surface 132 may be provided with a light guiding structure (not shown) for reflecting the guiding light to be emitted from the light emitting surface 131.
  • the light guiding structure of the light reflecting surface 132 is, for example, a continuous V-shaped structure, that is, a V-Cut structure, a matte surface structure, and a scattering point structure, so that the light guiding the light source 120 is sufficiently emitted from the light emitting surface 131.
  • the side light incident surface 134 is formed on one side or opposite sides of the light guide plate 130 , and corresponds to 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 134 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.
  • V-Cut V-shaped structure
  • S-shaped wave structure S-shaped wave structure
  • a surface roughening treatment not shown
  • the side incident surface 134 can be a plane that is perpendicular to the light reflecting surface 132.
  • the positioning protrusion 133 is integrally formed on at least one side of the light guide plate 130 and protrudes from the light-emitting surface 131 for positioning and assembling the display panel 101 on the light-emitting surface 131 of the light guide plate 130 .
  • the latch extension portion 111 of the 110 covers at least the positioning convex portion 133, that is, the latch extension portion 111 is a positioning convex portion 133 that extends at least to the positioning convex portion 133 to chuck the light guide plate 130.
  • a recess space is also formed between the bottom plate of the housing 110 and the cassette extending portion 111.
  • the light guide plate 130 can be directly inserted into the recessed space of the housing 110, so that the light guide plate can be assembled quickly and easily. 130 is within the housing 110. In an embodiment, the light guide plate 130 can be further fixed in the housing 110 by, for example, screwing or snapping.
  • the two positioning protrusions 133 are formed on the two sides of the light guide plate 130. Therefore, the display panel 101 can be directly inserted between the two positioning protrusions 133 to position the display panel 101 on the light guide plate 130. On the face 131.
  • the height of the positioning protrusion 133 is preferably greater than the sum of the thicknesses of the display panel 101 and the optical film 150 to simultaneously position the display panel 101 and the optical film 150 on the light guide plate 130.
  • the reflective layer 140 (or the reflective sheet) of the present embodiment is preferably formed on the surface of the light guide plate 130, such as the surface of the light reflecting surface 132 and the positioning convex portion 133, and is only exposed to allow light to enter.
  • the reflective layer 140 can be made of a high reflectivity material such as silver, aluminum, gold, chromium, copper, indium, antimony, nickel, platinum, rhodium, iridium, tin, antimony, tungsten, manganese, alloys of any combination thereof, resistant A yellowish, heat-resistant white reflective paint or any combination of the above materials to reflect light.
  • the optical film 150 of the present embodiment is, for example, a diffusion sheet, a prism sheet, and a reverse prism sheet (Turning Prism).
  • Sheet Brightness Enhancement Film (BEF), Reflective Brightness Enhancement Film (Dual Brightness Enhancement) Film, DBEF), non-multilayer film reflective polarizer (Diffused Reflective Polarizer)
  • BEF Brightness Enhancement Film
  • DBEF Reflective Brightness Enhancement Film
  • DBEF Non-multilayer film reflective polarizer
  • the film, DRPF, or any combination thereof is disposed on the light guide plate 130 and can be positioned on the light exit surface 131 by the positioning protrusions 133 for improving the optical effect of the light emitted from the light guide plate 130.
  • the light source 120, the light guide plate 130, the reflective layer 140, and the optical film 150 can be assembled in the housing 110, wherein the optical film 150 can directly pass through the positioning convex.
  • the portion 133 is positioned on the light-emitting surface 131.
  • the optical film 150 can be directly inserted between the two positioning protrusions 133 of the light guide plate 130, thereby positioning the optical film 150 on the light-emitting surface 131.
  • the display panel 101 can be directly assembled and assembled on the optical film 150 through the positioning convex portion 133 of the light guide plate 130, thereby assembling the display device of the embodiment.
  • the cassette extension portion 111 of the housing 110 is preferably a display panel 101 that extends to a portion to simultaneously latch the display panel 101 into the housing 110.
  • the latching portion 111 of the housing 110 extends from the positioning protrusion 133 for latching against the display panel 101, so that the backlight module 100 and the display panel 101 can be assembled more stably.
  • the display panel 101 can be easily and quickly assembled on the backlight module 100 through the positioning convex portion 133 of the light guide plate 130, and the parts and weight of the display device can be reduced.
  • the display panel 101 can be directly assembled and positioned on the backlight module 100.
  • the backlight module of the embodiment can greatly save assembly time, labor, and cost of the display device.
  • FIG. 4 is a schematic view showing a backlight module and a display panel according to a second embodiment of the present invention
  • FIG. 5 is a perspective view showing a light guide plate according to a second embodiment of the present invention. 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 guide plate 230 of the second embodiment has a light-emitting surface 231, a light-reflecting surface 232, at least one positioning convex portion 233 and a side light-incident surface 234, and the positioning convex portion 233 has a latching groove 235. Used to jam the display panel 101.
  • the display panel 101 and the optical film 150 can be directly inserted into the space formed between the positioning convex portions 233 and embedded in the latch of the positioning convex portion 233.
  • the light guide plate 230 of the present embodiment can integrate the backlight module 100 and the display panel 101 more stably, and can greatly simplify the structure and assembly process of the display device.
  • the light source 320 of the third embodiment is disposed on at least one side of the light guide plates 130 and 230 and located below the positioning convex portions 133 and 233, that is, the light source 320 is disposed.
  • the height is equal to or smaller than the distance between the light-emitting surfaces 131, 231 and the light-reflecting surfaces 132, 232.
  • the position of the light source 320 directly corresponds to the light-emitting surfaces 131, 231 and the light-reflecting surfaces 132, 232, it can be ensured that the light of the light source 320 can be directly incident between the light-emitting surfaces 131, 231 and the light-reflecting surfaces 132, 232. And can reduce unnecessary light energy loss.
  • the positioning protrusions 133, 233 are selectively provided with the latching grooves 235, as shown in FIG. 6 or FIG.
  • the backlight module and the display device of the present invention can easily and quickly assemble the display panel on the backlight module through the positioning convex portion of the light guide plate.
  • the invention can simplify the assembly structure and the assembly process of the display device, thereby greatly saving assembly time and overall cost of the display device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

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，特别是涉及一种侧向式入光的背光模块及显示装置。
背景技术
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。
通常，液晶显示器的液晶显示面板是由一塑框来支撑于背光模块上，并使用一前框来组装液晶显示面板于背光模块上。然而，此种组装方式需耗费较多人力和时间，且需使用较多零件(塑框及前框)来进行组装，因而增加液晶显示器的组装成本、人力及时间。
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。
 技术问题
本发明的主要目的在于提供一种背光模块，所述背光模块包括：
壳体，具有卡掣延伸部，所述卡掣延伸部形成于所述壳体的至少一侧；
导光板，设置于所述壳体内，其中所述导光板具有出光面及至少一定位凸部，所述定位凸部是突出于所述出光面，且所述卡掣延伸部是至少覆盖住并卡掣所述定位凸部；以及
光源，设置于所述导光板的至少一侧。
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：
壳体，具有卡掣延伸部，所述卡掣延伸部形成于所述壳体的至少一侧；
导光板，设置于所述壳体内，其中所述导光板具有出光面及定位凸部，所述定位凸部是突出于所述出光面，且所述卡掣延伸部是至少覆盖住并卡掣抵接所述定位凸部，所述显示面板放置在所述导光板的出光面上；以及
光源，设置于所述导光板的至少一侧。
 技术解决方案
在本发明的一实施例中，所述定位凸部具有卡掣凹槽，用以卡掣显示面板。
在本发明的一实施例中，所述背光模块还包括光学膜片，设置于所述导光板的所述出光面上，并卡掣于所述定位凸部的所述卡掣凹槽内。
在本发明的一实施例中，所述壳体的所述卡掣延伸部是延伸出所述定位凸部，用以卡掣抵接显示面板。
在本发明的一实施例中，所述光源的设置高度是等于或小于所述导光板的出光面与光反射面之间的距离。
在本发明的一实施例中，所述背光模块还包括反射层，其形成所述导光板的光反射面及定位凸部的表面上，并暴露出所述导光板的侧入光面及出光面。
在本发明的一实施例中，所述导光板是利用螺固或卡扣的方式来固定于所述壳体内。
在本发明的一实施例中，二个所述定位凸部是形成于所述导光板的两侧。
在本发明的一实施例中，所述定位凸部的高度是大于显示面板及至少一光学膜片的厚度总和。
相较于现有的液晶显示器需使用较多零件来进行组装，本发明的显示面板可通过导光板的定位凸部来简易且快速地定位或插设于背光模块上，因而可大幅地简化显示装置的组装结构及组装过程，并节省显示装置的组装时间及整体成本。
 有益效果
本发明的背光模块和显示装置可通过导光板的定位凸部来简易且快速地组装显示面板于背光模块上。且通过导光板的结构设计，本发明可简化显示装置的组装结构及组装过程，因而可大幅地节省显示装置的组装时间及整体成本。
 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剖面示意图；
图2显示依照本发明的第一实施例的壳体的立体示意图；
图3显示依照本发明的第一实施例的导光板的立体示意图；
图4显示依照本发明的第二实施例的背光模块与显示面板的示意图；
图5显示依照本发明的第二实施例的导光板的立体示意图；以及
图6和7显示依照本发明的第三实施例的背光模块与显示面板的剖面示意图。
 本发明的最佳实施方式
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至图3，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示意图，图2显示依照本发明的第一实施例的壳体的立体示意图，图3显示依照本发明的第一实施例的导光板的立体示意图。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包括有壳体110、至少一光源120、导光板130、反射层140及光学膜片150。壳体110是用以装设光源120、导光板130、反射层140及光学膜片150。此至少一光源120是设置于导光板130的至少一侧，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可形成于壳体110与导光板130之间，用以反射光源120的光线。光学膜片150是设置于导光板130上，以改善光学效果。
如图1及图2所示，本实施例的壳体110是由不透光材质所制成，例如：塑胶材料、金属材料或上述材料的组合。壳体110具有卡掣延伸部111，其是壳体110的一侧来向内延伸，用以卡掣及组装导光板130于壳体110内。
如图1所示，本实施例的光源120例如为冷阴极萤光灯管(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 Bar)或上述的任意组合。
在一实施例中，光源120可例如为发光灯条，其可包括电路板和发光组件 (例如LED晶粒)，电路板例如为印刷电路板(Printed circuit board，PCB)或软性印刷电路板(Flexible Printed Circuits，FPC)，发光组件是设置电路板上。
如图1及图3所示，本实施例的导光板130例如是利用射出成型(Injection Molding)的方式来制成，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)，用以导引光源120的光线至液晶显示面板101。导光板130具有出光面131、光反射面132、至少一定位凸部133及侧入光面134。出光面131是形成于导光板130的一侧，并面对液晶显示面板101，出光面131可具有雾面处理或散射点设计，以便均匀化导光板130的出光，减少出光不均(Mura)的现象。在一实施例中，出光面131更可设有若干个突出结构(未绘示)，以便进一步修正光线的方向，来增加聚光效果，并提高正面辉度。其中此些突出结构可例如为：棱形或半圆形的凸起或凹陷结构等。光反射面132是形成导光板130的相对另一侧，用以反射光线至出光面131。在本实施例中，导光板130的光反射面132平行于出光面131。光反射面132可设有导光结构(未绘示)，以反射导引光线由出光面131射出。光反射面132的导光结构例如是呈连续性的V形结构，亦即V-Cut结构、雾面结构、散射点结构，以便导引光源120的光线充分的由出光面131射出。侧入光面134是形成于导光板130的一侧或相对两侧，其对应于光源120，用以允许光源120所发出的光线可进入导光板130内。且此侧入光面134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，此侧入光面134可为一平面，其垂直于光反射面132。
如图1所示，定位凸部133是一体形成于导光板130的至少一侧，并突出于出光面131，用以定位及组装显示面板101于导光板130的出光面131上，其中壳体110的卡掣延伸部111是至少覆盖住定位凸部133，亦即卡掣延伸部111是至少延伸至定位凸部133，以卡掣导光板130的定位凸部133。另一方面，壳体110的底板与卡掣延伸部111之间也形成了一凹槽空间，因此，导光板130可直接插入壳体110的凹槽空间内，因而可快速且简易组装导光板130于壳体110内。在一实施例中，导光板130亦可利用例如螺固或卡扣的方式来进一步固定于壳体110内。
在本实施例中，二个定位凸部133形成于导光板130的两侧，因而显示面板101可直接插置于二个定位凸部133之间，以定位显示面板101于导光板130的出光面131上。定位凸部133的高度优选是大于显示面板101及光学膜片150的厚度总和，以同时定位显示面板101及光学膜片150于导光板130上。
如图1所示，本实施例的反射层140(或反射片)优选是形成导光板130的表面上，如光反射面132及定位凸部133的表面，而仅暴露出用以允许光线进入的侧入光面134以及用以发出光线的出光面131。反射层140可由高反射率材料所制成，例如银、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。
如图1所示，本实施例的光学膜片150例如为：扩散片、棱镜片、逆棱镜片(Turning Prism Sheet)、增亮膜(Brightness Enhancement Film，BEF)、反射式增亮膜(Dual Brightness Enhancement Film，DBEF)、非多层膜式反射偏光片(Diffused Reflective Polarizer Film，DRPF)或上述的任意组合，其设置于导光板130上，并可被定位凸部133定位于出光面131上，用以改善由导光板130出光的光学效果。
当组装本实施例的背光模块100及显示面板101时，首先，光源120、导光板130、反射层140及光学膜片150可组装于壳体110内，其中光学膜片150可直接通过定位凸部133来定位于出光面131上，在本实施例中，光学膜片150可直接插置于导光板130的二个定位凸部133之间，因而定位光学膜片150于出光面131上。接着，显示面板101可直接通过导光板130的定位凸部133来定位组装于光学膜片150上，因而组装成本实施例的显示装置。
在本实施例中，当显示面板101组装于背光模块100上，壳体110的卡掣延伸部111优选是更延伸至部分的显示面板101，以同时卡掣显示面板101于壳体110内，壳体110的卡掣延伸部111延伸出定位凸部133，用以卡掣抵接显示面板101，因而可更稳固地组装背光模块100及显示面板101成一体。
因此，通过导光板130的定位凸部133，显示面板101可简易且快速地组装于背光模块100上，并可减少显示装置的零件和重量，例如，显示面板101可直接组装定位于背光模块100上，而不需使用前框或塑框。故本实施例的背光模块可大幅地节省显示装置的组装时间、人力及成本。
请参照图4及图5，图4显示依照本发明的第二实施例的背光模块与显示面板的示意图，图5显示依照本发明的第二实施例的导光板的立体示意图。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，第二实施例的导光板230具有出光面231、光反射面232、至少一定位凸部233及侧入光面234，定位凸部233具有卡掣凹槽235，用以卡掣显示面板101。因此，当组装本实施例的背光模块100及显示面板101时，显示面板101和光学膜片150可直接插入定位凸部233之间所形成的空间，并嵌设于定位凸部233的卡掣凹槽235内，以组装成显示装置。因此，本实施例的导光板230可更稳固地组装背光模块100及显示面板101成一体，且可大幅地简化显示装置的结构及组装过程。
请参照图6和7，其显示依照本发明的第三实施例的背光模块与显示面板的示意图。以下仅就第三实施例与第一实施例及第二实施例之间的相异处进行说明，而其相似处则在此不再赘述。相较于第一实施例及第二实施例，第三实施例的光源320是设置于导光板130、230的至少一侧，且位于定位凸部133、233的下方，亦即光源320的设置高度是等于或小于出光面131、231与光反射面132、232之间的距离。由于光源320的位置是直接对应于出光面131、231与光反射面132、232之间，因而可确保光源320的光线可直接入射至出光面131、231与光反射面132、232之间，并可减少不必要的光能损耗。在本实施例中，定位凸部133、233可选择性地设有卡掣凹槽235，如图6或图7。
由上述可知，本发明的背光模块和显示装置可通过导光板的定位凸部来简易且快速地组装显示面板于背光模块上。且通过导光板的结构设计，本发明可简化显示装置的组装结构及组装过程，因而可大幅地节省显示装置的组装时间及整体成本。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选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。
 本发明的实施方式
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  1. 一种背光模块，其特征在于：所述背光模块包括：
    壳体，具有卡掣延伸部，所述卡掣延伸部形成于所述壳体的至少一侧；
    导光板，设置于所述壳体内，其中所述导光板具有出光面及定位凸部，所述定位凸部是突出于所述出光面，所述定位凸部具有卡掣凹槽，用以卡掣显示面板，且所述壳体的所述卡掣延伸部是至少覆盖住并卡掣所述定位凸部；
    光源，设置于所述导光板的至少一侧；以及
    至少一光学膜片，设置于所述导光板的所述出光面上，并卡掣于所述定位凸部的所述卡掣凹槽内。
  2. 2. 根据权利要求1所述的背光模块，其特征在于：所述壳体的所述卡掣延伸部是延伸出所述定位凸部，用以卡掣抵接显示面板。
  3. 3. 根据权利要求1所述的背光模块，其特征在于：所述光源的设置高度是等于或小于所述导光板的出光面与光反射面之间的距离。
  4. 4. 根据权利要求1所述的背光模块，其特征在于：还包括反射层，其形成所述导光板的光反射面及定位凸部的表面上，并暴露出所述导光板的侧入光面及出光面。
  5. 5. 根据权利要求1所述的背光模块，其特征在于：所述导光板是利用螺固或卡扣的方式来固定于所述壳体内。
  6. 6. 根据权利要求1所述的背光模块，其特征在于：二个所述定位凸部是形成于所述导光板的两侧。
  7. 7. 根据权利要求1所述的背光模块，其特征在于：所述定位凸部的高度是大于所述显示面板及所述光学膜片的厚度总和。
  8. 8. 一种背光模块，其特征在于：所述背光模块包括：
    壳体，具有卡掣延伸部，所述卡掣延伸部形成于所述壳体的至少一侧；
    导光板，设置于所述壳体内，其中所述导光板具有出光面及至少一定位凸部，所述定位凸部是突出于所述出光面，且所述卡掣延伸部是至少覆盖住并卡掣所述定位凸部；以及
    光源，设置于所述导光板的至少一侧。
  9. 9. 根据权利要求8所述的背光模块，其特征在于：所述定位凸部具有卡掣凹槽，用以卡掣显示面板。
  10. 10. 根据权利要求8所述的背光模块，其特征在于：所述壳体的所述卡掣延伸部是延伸出所述定位凸部，用以卡掣抵接显示面板。
  11. 11. 根据权利要求8所述的背光模块，其特征在于：所述光源的设置高度是等于或小于所述导光板的出光面与光反射面之间的距离。
  12. 12. 根据权利要求8所述的背光模块，其特征在于：还包括反射层，其形成所述导光板的光反射面及定位凸部的表面上，并暴露出所述导光板的侧入光面及出光面。
  13. 13. 根据权利要求8所述的背光模块，其特征在于：所述导光板是利用螺固或卡扣的方式来固定于所述壳体内。
  14. 14. 根据权利要求8所述的背光模块，其特征在于：二个所述定位凸部是形成于所述导光板的两侧。
  15. 15. 根据权利要求8所述的背光模块，其特征在于：所述定位凸部的高度是大于显示面板及至少一光学膜片的厚度总和。
  16. 16. 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：
    壳体，具有卡掣延伸部，所述卡掣延伸部形成于所述壳体的至少一侧；
    导光板，设置于所述壳体内，其中所述导光板具有出光面及定位凸部，所述定位凸部是突出于所述出光面，且所述卡掣延伸部是至少覆盖住并卡掣抵接所述定位凸部，所述显示面板放置在所述导光板的出光面上；以及
    光源，设置于所述导光板的至少一侧。
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