WO2021077328A1 - 背光模块及显示设备 - Google Patents

背光模块及显示设备 Download PDF

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Publication number
WO2021077328A1
WO2021077328A1 PCT/CN2019/112769 CN2019112769W WO2021077328A1 WO 2021077328 A1 WO2021077328 A1 WO 2021077328A1 CN 2019112769 W CN2019112769 W CN 2019112769W WO 2021077328 A1 WO2021077328 A1 WO 2021077328A1
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WO
WIPO (PCT)
Prior art keywords
placement portion
light
area
backlight module
metal back
Prior art date
Application number
PCT/CN2019/112769
Other languages
English (en)
French (fr)
Inventor
黄琳育
林忆珊
叶静洁
Original Assignee
瑞仪(广州)光电子器件有限公司
瑞仪光电股份有限公司
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 瑞仪(广州)光电子器件有限公司, 瑞仪光电股份有限公司 filed Critical 瑞仪(广州)光电子器件有限公司
Priority to PCT/CN2019/112769 priority Critical patent/WO2021077328A1/zh
Priority to CN201980005909.7A priority patent/CN113168048B/zh
Priority to TW108140745A priority patent/TWI707183B/zh
Priority to US16/992,716 priority patent/US11320583B2/en
Publication of WO2021077328A1 publication Critical patent/WO2021077328A1/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
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • 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
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/33—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving directional light or back-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
    • 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 invention relates to an optical device, in particular to a backlight module and a display device.
  • Display panels and panel display devices using the display panels have gradually become the mainstream of various display devices.
  • various panel displays, flat-screen TVs for home use, flat-panel monitors for personal computers and laptop computers, display screens for mobile phones and digital cameras, etc. are all products that use a large number of display panels.
  • the market demand for liquid crystal display devices has grown substantially in recent years.
  • the design of backlight modules used in liquid crystal display devices has also become increasingly diversified.
  • the backlight module of the liquid crystal display device needs to be equipped with more than two sets of light-emitting sources to cooperate with each other.
  • the current back frame structure design may allow part of the light source to be directly arranged on the plastic frame, but the plastic frame is made of insulating material, which will result in poor heat dissipation effect, which makes the temperature of the liquid crystal display device concentrated and high under driving conditions.
  • the object of the present invention is to provide a backlight module with good heat dissipation effect.
  • the backlight module of the present invention includes a frame unit, a plurality of light emitting units, a first optical unit, and a second optical unit.
  • the frame unit includes a metal back frame, the metal back frame has a first placement portion and a second placement portion spaced apart from the first placement portion, wherein the first placement portion and the second placement portion have different heights.
  • One of the light-emitting units is disposed on the first placement portion, and the other light-emitting unit is disposed on the second placement portion.
  • the first optical unit is used for receiving light from the light-emitting unit provided on the first placement portion
  • the second optical unit is used for receiving light from the light-emitting unit provided on the second placement portion.
  • the metal back frame has a rectangular body region, a first side region connected to one side of the body region, connected to the other side of the body region and opposite to the first side region.
  • the second side area of the area, and two third side areas respectively connecting the first side area and the second side area, the first side area and the second side area are divided by the body area It extends upward and is higher than the body region, and the cross section of the first side region and the second side region is inverted U shape, and the two third side regions extend upward from the body region to form side walls.
  • the first placement portion is located at a position of the body area adjacent to the first side area, and the second placement portion is located at the flat top of the first side area.
  • the first placement portion is located at a position of the body area adjacent to the third side area, and the second placement portion is located at the top flat portion of the first side area.
  • the metal back frame also has a third placement portion located in the second side area, and the third placement portion is located at the top of the second side area and is flat with the second placement.
  • the heights of the parts are the same, one of the light-emitting units is disposed on the third placement part, and the second optical unit further receives light from the light-emitting units disposed on the third placement part.
  • the metal back frame also has a plurality of holes, which are distributed at intervals between the second placement portion, the third placement portion, and the junction of the two third side areas and the body area .
  • the frame unit further includes a plastic frame, which is wrapped around the first side area, the second side area, and the two third side areas of the metal back frame, and filled In the hole.
  • the metal back frame further has at least one threading opening located in the first side region or the second side region, and the hole arrangement density adjacent to the threading opening is relatively high.
  • Another object of the present invention is to provide a display device including the aforementioned backlight module.
  • the display device of the present invention includes the aforementioned backlight module and a display panel arranged on the backlight module.
  • the effect of the present invention is that through the structural design of the metal back frame of the frame unit, the light-emitting unit can be directly contacted with the metal back frame, and the heat dissipation efficiency is improved.
  • FIG. 1 is a perspective exploded view, which is a first preferred embodiment of the backlight module of the present invention
  • Figure 2 is a perspective view showing the structure of the frame unit in the preferred embodiment
  • Figure 3 is a side cross-sectional view to assist in explaining Figure 2;
  • Figures 4 and 5 are partial enlarged views, illustrating the detailed structure of the framed part in Figure 2;
  • Figure 6 is a side cross-sectional view illustrating the combined state of Figure 1;
  • Figure 7 is a side cross-sectional view illustrating that Figure 6 adds a display panel to become a display device
  • FIG. 8 is a top view showing the second preferred embodiment of the backlight module of the present invention.
  • FIG. 9 is a schematic top view illustrating the dimming effect of the second preferred embodiment, which is partially illuminated.
  • FIG. 1 it is a first preferred embodiment of the backlight module of the present invention, which includes a frame unit 2, a plurality of light emitting units 3, a first optical unit 4, and a second optical unit 5.
  • the frame unit 2 includes a metal back frame 21 and a plastic frame 22 covering the metal back frame 21.
  • the metal back frame 21 has a rectangular body region 211, a first side region 212 connected to one side of the body region 211, and a first side region 212 connected to the other side of the body region 211 and opposite to the first side region 212.
  • the first side region 212 and the second side region 213 of the metal back frame 21 extend upward from the body region 211 to be higher than the body region 211, and the first side region 212 and the second side region 213 extending upward can be bent upward from the end edge of the body region 211 as shown in FIG. 3, and the cross section of the first side region 212 and the second side region 213 is inverted U
  • the two third side regions 214 extend upward from the body region 211 to form side walls.
  • the two third side regions 214 extend upward and can be bent by the end edge of the body region 211 as shown in FIG. Fold up and extend.
  • the body area 211 has a first placement portion 215, the first side area 212 has a second placement portion 216, and the second side area 213 has a third placement portion 217.
  • the first placement portion 215 is located at a position adjacent to the first side area 212 of the main body area 211
  • the second placement portion 216 is located at a flat top of the first side area 212
  • the third The placement portion 217 is located at the flat top of the second side area 213 and has the same height as the second placement portion 216.
  • the metal back frame 21 also has a plurality of holes 23 and threading openings 24.
  • the holes 23 are distributed at intervals between the second placement portion 216, the third placement portion 217, and the junction of the two third side regions 214 and the body region 211. Wherein, the holes 23 are arranged at a higher density near the threading opening 24.
  • the threading opening 24 is located at the first side area 212.
  • the threading opening 24 can be located at the second side area 213, or the first side area 212 and the first side area 212 depending on the actual manufacturing conditions.
  • the second side area 213 is available, and is not limited to what is disclosed in this embodiment.
  • the plastic frame 22 wraps the first side region 212, the second side region 213, and the two third side regions 214 of the metal back frame 21 by injection molding, and fills the Inside the hole 23. Therefore, the holes 23 are arranged at a higher density near the threading opening 24 in order to increase the bonding force between the plastic frame 22 and the metal back frame 21 near the threading opening 24 and avoid the plastic frame 22 In the vicinity of the threading port 24, a phenomenon that it is easy to fall off occurs.
  • the first placement portion 215, the second placement portion 216, and the third placement portion 217 are respectively used to set the light-emitting unit 3 so that the light-emitting unit 3 can be directly arranged on the metal back frame 21. That is to say, in this preferred embodiment, the light emitting units 3 are arranged parallel to each other when viewed from a top view, but viewed from a cross-sectional side view in the thickness direction, the light emitting units 3 can be divided into upper and lower light emitting units 3.
  • each light-emitting unit 3 includes a circuit board 31 and a plurality of light-emitting elements 32 electrically connected to the circuit board 31 (only one is shown due to the viewing angle).
  • the first optical unit 4 is used to receive light from the light-emitting unit 3 disposed on the first placement portion 215, and includes a first light guide plate 41, and a first optical film group 42 disposed on the first light guide plate 41 .
  • the first optical film set 42 may include various optical films such as a brightness enhancement film, an upper prism film, a lower prism film, a diffuser film, a color conversion film, etc., depending on actual needs to select types and increase or decrease the number.
  • the second optical unit 5 is located above the first optical unit 4 and is disposed between the second placement portion 216 and the third placement portion 217, and includes a second light guide plate 51.
  • the second optical unit 5 is used for receiving the light of the light emitting unit 3 disposed on the second placement portion 216 and the third placement portion 217.
  • the first light guide plate 41 is a 2D light guide plate, made of plastic, usually PMMA
  • the second light guide plate 51 is a 3D light guide plate, made of glass, and has a semiconductor photoresist etching process. To form dots.
  • the backlight module of the present invention when the backlight module of the present invention is assembled in the manner shown in FIG. 6, and the display panel 6 is added, it becomes a display device.
  • the backlight module of the present invention When the backlight module of the present invention is applied to a mobile phone or screen with a 3D stereoscopic display function, it can be switched between a 2D plane display function and a 3D stereoscopic display function.
  • the light-emitting unit 3 can emit light.
  • the light-emitting unit 3 provided in the second placement portion 216 and the third placement portion 217 does not emit light or emits a small amount of light.
  • the second light guide plate 51 being made of glass, it will not The light emitted to the lower layer is blocked, and converted into surface light by the first optical unit 4, which passes through the second light guide plate 51 and can be provided to the display panel 6 to form a 2D flat display function.
  • the first optical unit 4 which passes through the second light guide plate 51 and can be provided to the display panel 6 to form a 2D flat display function.
  • the light-emitting unit 3 provided in the second placement portion 216 and the third placement portion 217 can emit light
  • the light-emitting unit 3 provided in the first placement portion 215 can emit light. No light is emitted, that is, the direction of light is controlled by using these two different light-emitting units 3.
  • the left-eye image is displayed, only the light-emitting unit 3 for the left eye will be on.
  • the light will only enter the position of the left eye due to the control of the second light guide plate 51; similarly, when the right-eye is displayed In the case of the eye screen, the light-emitting unit 3 for the right eye is used instead, so that the light can only enter the position of the right eye.
  • a pair of stereo images can be alternately projected to the left eye or the right eye to form a high-resolution naked-view 3D stereo display function.
  • the metal back frame 21 is formed by bending, so that the cross section of the first side region 212 and the second side region 213 presents an inverted U shape.
  • the body area 211 of the metal back frame 21 plus the first side area 212 and the second side area The area 213 respectively forms the first placement portion 215, the second placement portion 216, and the third placement portion 217 for the light-emitting unit 3 to be installed, and the light-emitting unit 3 directly contacts the metal back frame 21.
  • the heat energy generated during operation will be led out and dissipated by the metal back frame 21, so as to prevent the heat energy from continuously accumulating and leading to temperature increase.
  • the second placement portion 216 and the third placement portion 216 are formed on the flat top of the first side area 212 and the second side area 213 respectively.
  • the portion 217 is thereby misaligned with the first placement portion 215 on the body area 211 to avoid mutual interference, which effectively improves the assembly yield of the light-emitting unit 3 and reduces the damage of the light-emitting element 32 caused by the assembly process.
  • the metal back frame 21 of the present preferred embodiment forms an inverted U-shape on both sides, which effectively reduces the possibility of bending due to external forces and can also reduce the glue
  • the plastic shrinkage characteristic of the frame 22 strengthens the overall structure and reduces the risk of deformation.
  • FIG. 8 it is a second preferred embodiment of the backlight module of the present invention, which is substantially the same as the first preferred embodiment, except that the first placement portion 215 is located in the body area 211 adjacent to the third side area 214 , The second placement portion 216 is located at the flat top of the first side area 212. That is, in the preferred embodiment, the first placement portion 215 is perpendicular to the second placement portion 216 and the third placement portion 217 respectively.
  • the backlight module of the present invention from the side cross-sectional view in the thickness direction, it can still be divided into upper and lower light-emitting units 3, but from the top view, the light-emitting units 3 are perpendicular to each other.
  • the light emitting unit 3 provided on the first placement portion 215 emits light along the X axis
  • the light emitting unit 3 provided on the second placement portion 216 and the third placement portion 217 emits light along the Y axis.
  • the first light guide plate 41 and the second light guide plate 51 can be made of plastic materials, and the light-emitting units 3 arranged perpendicular to each other can be used to control each of the light-emitting units 3
  • the lighting condition of the light-emitting element 32 enables the display panel 6 to present a local dimming effect (local dimming) as shown in FIG. 9, and it can be applied to a larger-size display screen, such as a monitor or a TV.
  • HDR High Dynamic Range
  • the backlight module and display device of the present invention can provide multiple light-emitting units 3 in direct contact and staggered arrangement at the same time. In addition to improving the heat conduction and heat dissipation efficiency, it can also Improve assembly efficiency and strengthen structure.

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

Abstract

一种背光模块及显示设备。背部模块包括框架单元（2）、复数个发光单元（3）、第一光学单元（4）及第二光学单元（5）。框架单元（2）包括金属背框（21），金属背框（21）具有第一放置部（215），及间隔于第一放置部（215）的第二放置部（216），第一放置部（215）与第二放置部（216）的高度不同。发光单元（3）设置于第一放置部（215）上，另一发光单元（3）设置于第二放置部（216）上。第一光学单元（4）用于接收设置于第一放置部（215）的发光单元（3）的光线，第二光学单元（5）用于接受设置于第二放置部（216）的发光单元（3）的光线。通过金属背框（21）的结构设计，使发光单元（3）都能直接与金属背框（21）接触，提升散热效率。

Description

背光模块及显示设备 技术领域
本发明涉及一种光学设备，特别是涉及一种背光模块及显示设备。
背景技术
显示面板及使用显示面板的面板显示设备已渐渐成为各类显示设备的主流。例如各式面板显示屏、家用的平面电视、个人计算机及膝上型计算机的平板型监视器、移动电话及数字相机的显示屏等，均为大量使用显示面板的产品。特别是近年来液晶显示设备的市场需求大幅成长，为配合液晶显示设备在功能上及外观上的要求，液晶显示设备所使用的背光模块设计也日趋多元化。
为了因应液晶显示设备对于各种出光模式的需求，其背光模块需要配置两组以上的发光源互相配合。然而，目前的背框结构设计，可能会让部分的发光源直接设置在胶框上，但胶框为绝缘材质会导致散热效果不佳，使得液晶显示设备在驱动状况下温度集中且较高。
发明内容
因此，本发明的目的是提供一种具有良好散热效果的背光模块。
本发明背光模块包括框架单元、复数发光单元、第一光学单元，及第二光学单元。该框架单元包括金属背框，该金属背框具有第一放置部，及间隔于该第一放置部的第二放置部，其中，该第一放置部与该第二放置部的高度不同。其中一个发光单元设置于该第一放置部上，另一发光单元设置于该第二放置部上。该第一光学单元用以接收设置于该第一放置部的发光单元的光线，而该第二光学单元用以接收设置于该第二放置部的发光单元的光线。
本发明的另一技术手段，在于该金属背框具有呈矩形的本体区、连接于该本体区一侧的第一侧边区、连接于该本体区另一侧且相对于该第一侧边区的第二侧边区，及两个分别连接该第一侧边区与该第二侧边区的第三侧边区，该第一侧边区与该第二侧边区由该本体区向上延伸而高于该本体区，且该第一侧边区与该第二侧边区的剖面呈倒U形，该两个第三侧边区由该本体区向上延伸而形成侧墙。
本发明的另一技术手段，在于该第一放置部位于该本体区邻近该第一侧边区的位置，该第二放置部位于该第一侧边区的顶部平坦处。
本发明的另一技术手段，在于该第一放置部位于该本体区邻近该第三侧边区的位置，该第二放置部位于该第一侧边区的顶部平坦处。
本发明的另一技术手段，在于该金属背框还具有位于该第二侧边区的第三放置部，该第三放置部位于该第二侧边区的顶部平坦处并与该第二放置部的高度相同，其中一个发光单元设置于该第三放置部上，该第二光学单元更进一步接收设置于该第三放置部的发光单元的光线。
本发明的另一技术手段，在于该金属背框还具有复数破孔，间隔分布于该第二放置部、该第三放置部，及该两个第三侧边区与该本体区的交界处。
本发明的另一技术手段，在于该框架单元还包括胶框，包覆于该金属背框的该第一侧边区、该第二侧边区，及该二第三侧边区，并填充于所述破孔内。
本发明的另一技术手段，在于该金属背框还具有至少一个位于该第一侧边区或第二侧边区的穿线口，邻近该穿线口的破孔排列密度较高。
本发明的另一目的是提供一种包括前述背光模块的显示设备。
本发明显示设备包括如前述的背光模块，及设置于该背光模块上的显示面板。
本发明的功效在于，通过该框架单元的该金属背框的结构设计，让所述发光单元都能直接与该金属背框接触，提升散热效率。
附图说明
图1是立体分解图，为本发明背光模块的第一较佳实施例；
图2是立体图，为该较佳实施例中，框架单元的结构；
图3是侧视剖示图，辅助说明图2；
图4及图5均为局部放大图，说明图2中框示部位的细部结构；
图6是侧视剖示图，说明图1组合后的态样；
图7是侧视剖示图，说明图6加上显示面板成为显示设备；
图8是俯视图，为本发明背光模块的第二较佳实施例；及
图9是俯视示意图，说明该第二较佳实施例中，局部发亮的调光效果。
具体实施方式
有关本发明的相关申请专利特色与技术内容，在以下配合参考附图的较佳实施例的详细说明中，将可清楚的呈现。在进行详细说明前应注意的是，类似的组件以相同的编号来作表示。
参阅图1，为本发明背光模块的第一较佳实施例，包括框架单元2、复数发光单元3、第一光学单元4，及第二光学单元5。
参阅图2及图3，该框架单元2包括金属背框21，及包覆该金属背框21的胶框22。该金属背框21具有呈矩形的本体区211、连接于该本体区211一侧的第一侧边区212、连接于该本体区211另一侧且相对于该第一侧边区212的第二侧边区213，及两个分别连接该第一侧边区212与该第二侧边区213的第三侧边区214。
参阅图3并配合图2，该金属背框21的该第一侧边区212与该第二侧边区213由该本体区211向上延伸而高于该本体区211，该第一侧边区212与该第二侧边区213向上延伸可以如图3所示由该本体区211的端缘向上弯折，且该第一侧边区212与该第二侧边区213的剖面呈倒U形，该两个第三侧边区214则由该本体区211向上延伸而形成侧墙，该两个第三侧边区214向上延伸可以如图5所示由该本体区211的端缘弯折向上延伸。其中，该本体区211具有第一放置部215，该第一侧边区212具有第二放置部216，该第二侧边区213具有第三放置部217。于本实施例中，该第一放置部215位于该本 体区211邻近该第一侧边区212的位置，该第二放置部216位于该第一侧边区212的顶部平坦处，该第三放置部217则位于该第二侧边区213的顶部平坦处并与该第二放置部216的高度相同。
参阅图2、图4，及图5，该金属背框21还具有复数破孔23，及穿线口24。所述破孔23间隔分布于该第二放置部216、该第三放置部217，及该二第三侧边区214与该本体区211的交界处。其中，所述破孔23于邻近该穿线口24的位置排列密度较高。于本实施例中，该穿线口24位于该第一侧边区212，当然也可以视实际制造状况使该穿线口24位于该第二侧边区213，或该第一侧边区212与该第二侧边区213皆有，不以本实施例所揭露者为限。该胶框22以射出成型的方式包覆于该金属背框21的该第一侧边区212、该第二侧边区213，及该两个第三侧边区214，并填充于所述破孔23内。因此，所述破孔23于邻近该穿线口24的位置排列密度较高，是为了在该穿线口24附近提升该胶框22与该金属背框21之间的结合力，避免该胶框22在该穿线口24附近产生容易脱落的现象。
参阅图1及图3，更进一步说明的是，该第一放置部215、该第二放置部216，及该第三放置部217分别用于设置所述发光单元3，以使所述发光单元3能直接设置于该金属背框21上。也就是说，于本较佳实施例，所述发光单元3从俯视图上来看彼此互相平行设置，但是在厚度方向上的侧视剖视图上来看，则可以区分为上层与下层的发光单元3。
参阅图6，每一个发光单元3包括电路板31，及复数电连接于该电路板31的发光件32(因视角的关系只显示一个)。该第一光学单元4用于接收设置于该第一放置部215的发光单元3的光线，并包括第一导光板41，及设置于该第一导光板41上的第一光学膜片组42。该第一光学膜片组42可以包括增亮膜、上棱镜片、下棱镜片、扩散片、色彩转换片等各种光学膜片，得视实际需求进行种类的选择以及数量的增减。该第二光学单元5则位于该第一光学单元4的上方并且设置于该第二放置部216与该第三放置部217之间，包括第二导光板51。该第二光学单元5用于接收设置于该第二放置部216以及该第三放置部217的发光单元3的光线。于本较佳实施例中，该第 一导光板41为2D导光板，材质为塑料，通常使用PMMA，该第二导光板51则为3D导光板，材质为玻璃，并以半导体光阻蚀刻工艺形成网点。
参阅图7，当本发明背光模块依图6所示的方式组合完成后，再加上显示面板6，即成为显示设备。当本发明背光模块应用在具有3D立体显示功能的手机或屏幕时，可以在2D平面显示功能与3D立体显示功能之间切换，当切换至2D平面显示功能时，设置于该第一放置部215的发光单元3能够发出光线，设置于该第二放置部216以及该第三放置部217的发光单元3则未发光或发出少量的光线，配合该第二导光板51为玻璃材质，因此不会阻挡到下层散发的光线，让经由该第一光学单元4转化为面发光，穿过该第二导光板51而能提供给该显示面板6形成2D平面显示功能。另一方面，当切换至3D立体显示功能时，只有设置于该第二放置部216以及该第三放置部217的发光单元3能够发出光线，设置于该第一放置部215的发光单元3则未发光，也就是说，通过使用这两个不同的发光单元3，来控制光线的方向。在显示左眼画面的时候，只有左眼用的发光单元3会亮，这时候光线会因为经过该第二导光板51的控制，而只会进入到左眼的位置；同样的，当显示右眼画面时，改使用右眼用的发光单元3，就可以让光线只进入右眼的位置。如此一来，就可使成对的立体影像交替投影到左眼或右眼，以形成具有高分辨率的裸视3D立体显示功能。
本发明将该金属背框21以弯折成型的方式，使该第一侧边区212与该第二侧边区213的剖面呈现倒U形，上述结构可以产生以下优点：
一、提高导热及散热效率：本较佳实施例中需要配置三组的发光单元3，因此该金属背框21的该本体区211再加上该第一侧边区212与该第二侧边区213，分别形成该第一放置部215、该第二放置部216，及该第三放置部217供所述发光单元3设置，且所述发光单元3直接于该金属背框21接触，在运作时所产生的热能会由该金属背框21导出并散热，避免热能持续累积导致温度升高。
二、提升组配定位性：该第一侧边区212与该第二侧边区213弯折成倒U形后，各自在其顶部平坦处形成有该第二放置部216与该第三放置部217，藉此与该本体区211上的该第一放置部215错位避免互相干涉，有效 提高所述发光单元3的组装良率并减少组装过程造成所述发光件32的损伤。
三、强化结构：相较于一般完全为平坦状的金属框架，本较佳实施例的该金属背框21的两侧形成倒U形，有效减少因外力造成弯曲的可能，也可以减少该胶框22的塑料缩水特性，强化整体结构，降低变形风险。
参阅图8，为本发明背光模块的第二较佳实施例，大致与该第一较佳实施例相同，不同处在于该第一放置部215位于该本体区211邻近该第三侧边区214的位置，该第二放置部216位于该第一侧边区212的顶部平坦处。也就是说，于本较佳实施例中，该第一放置部215分别垂直于该第二放置部216及该第三放置部217。
换言之，本发明背光模块的第二较佳实施例，在厚度方向上的侧视剖视图上来看，仍可以区分为上层与下层的发光单元3，但是从俯视图上来看所述发光单元3彼此互相垂直设置，设置于该第一放置部215的发光单元3沿着X轴出光，而设置于该第二放置部216与该第三放置部217的发光单元3则沿着Y轴出光。同时，于本较佳实施例中，该第一导光板41及该第二导光板51可以皆采用塑料材质，并利用互相垂直设置的所述发光单元3，并控制所述发光单元3中各发光件32的发亮状况，而能使该显示面板6呈现如图9所示的局部发亮的调光效果(local dimming)，并且可以应用于较大尺寸的显示屏，例如监视器或电视，以达到高动态范围的效果(HDR,High Dynamic Range)。
综上所述，本发明背光模块及显示设备，通过将该金属背框21弯折出特定形状，能同时供多个发光单元3直接接触并错开设置，除了可以提高导热及散热效率，还能提升组装效能并强化结构。
以上所述者，仅为本发明的较佳实施例而已，当不能以此限定本发明实施的范围，即大凡依本发明申请专利范围及发明说明内容所作的简单的等效变化与修饰，皆仍属本发明的权利要求涵盖的范围内。
符号说明
2                  框架单元
21                 金属背框
211                本体区
212                第一侧边区
213                第二侧边区
214                第三侧边区
215                第一放置部
216                第二放置部
217                第三放置部
22                 胶框
23                 破孔
24                 穿线口
3                  发光单元
31                 电路板
32                 发光件
4                  第一光学单元
41                 第一导光板
42                 第一光学膜片组
5                  第二光学单元
51                 第二导光板
6                  显示面板

Claims (9)

  1. 一种背光模块，其特征在于包括：
    框架单元，包括金属背框，所述金属背框具有第一放置部及间隔于所述第一放置部的第二放置部，其中，所述第一放置部与所述第二放置部的高度不同；
    复数发光单元，其中一个发光单元设置于所述第一放置部上，另一发光单元设置于所述第二放置部上；
    第一光学单元，用于接收设置于所述第一放置部的发光单元的光线；以及
    第二光学单元，用于接收设置于所述第二放置部的发光单元的光线。
  2. 根据权利要求1所述的背光模块，其特征在于，所述金属背框具有呈矩形的本体区、连接于所述本体区一侧的第一侧边区、连接于所述本体区另一侧且相对于所述第一侧边区的第二侧边区，及两个分别连接所述第一侧边区与所述第二侧边区的第三侧边区，所述第一侧边区与所述第二侧边区由所述本体区向上延伸而高于所述本体区，且所述第一侧边区与所述第二侧边区的剖面呈倒U形，所述两个第三侧边区由所述本体区向上延伸而形成侧墙。
  3. 根据权利要求2所述的背光模块，其特征在于，所述第一放置部位于所述本体区邻近所述第一侧边区的位置，所述第二放置部位于所述第一侧边区的顶部平坦处。
  4. 根据权利要求2所述的背光模块，其特征在于，所述第一放置部位于所述本体区邻近所述第三侧边区的位置，所述第二放置部位于所述第一侧边区的顶部平坦处。
  5. 根据权利要求3或4所述的背光模块，其特征在于，所述金属背框还具有位于所述第二侧边区的第三放置部，所述第三放置部位于所述第二侧边区的顶部平坦处并与所述第二放置部的高度相同，其中一个发光单元设置于所述第三放置部上，所述第二光学单元更进一步接收设置于所述第三放置部的发光单元的光线。
  6. 根据权利要求5所述的背光模块，其特征在于，所述金属背框还具有复数破孔，间隔分布于所述第二放置部、所述第三放置部，及所述两个第三侧边区与所述本体区的交界处。
  7. 根据权利要求6所述的背光模块，其特征在于，所述框架单元还包括胶框，包覆于所述金属背框的所述第一侧边区、所述第二侧边区，及所述二第三侧边区，并填充于所述破孔内。
  8. 根据权利要求7所述的背光模块，其特征在于，所述金属背框还具有至少一个位于所述第一侧边区或第二侧边区的穿线口，邻近所述穿线口的破孔排列密度较高。
  9. 一种显示设备，其特征在于包括根据权利要求1至8中任一项所述的背光模块，及设置于所述背光模块上的显示面板。
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