WO2014056235A1 - 直下式背光模块结构 - Google Patents

直下式背光模块结构 Download PDF

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Publication number
WO2014056235A1
WO2014056235A1 PCT/CN2012/082941 CN2012082941W WO2014056235A1 WO 2014056235 A1 WO2014056235 A1 WO 2014056235A1 CN 2012082941 W CN2012082941 W CN 2012082941W WO 2014056235 A1 WO2014056235 A1 WO 2014056235A1
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Prior art keywords
light
backlight module
module structure
height
structural units
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PCT/CN2012/082941
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English (en)
French (fr)
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王烨文
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深圳市华星光电技术有限公司
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Priority to US13/805,935 priority Critical patent/US9188309B2/en
Publication of WO2014056235A1 publication Critical patent/WO2014056235A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • 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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present patent application relates to a backlight module structure, and in particular to a direct type backlight module structure.
  • the backlight module is used to provide a backlight source of the liquid crystal display, and is a liquid crystal display (Liquid Crystal Display, LCD) An important display component that is indispensable.
  • a light emitting diode Light Emitted Diode, Light-emitting diode (LED) backlights for LEDs have replaced traditional Cold Cathode Fluorescent Lamps with white light-emitting diodes (LEDs).
  • CCFL Cold Cathode Fluorescent Lamps with white light-emitting diodes (LEDs).
  • LEDs white light-emitting diodes
  • the corresponding light source has also changed from the original cold cathode fluorescent lamp (CCFL) line light source to a white light emitting diode (LED) point light source, and the difficulty of achieving uniform light mixing becomes large.
  • LEDs direct-lit backlight white light-emitting diodes
  • LEDs generally use high-power light-emitting diodes (LEDs) in order to reduce the cost, so the number of light-emitting diodes (LEDs) used is small, resulting in light-emitting diodes (LEDs).
  • the arrangement spacing between the two is large, which further makes the uniform light mixing of the point source more difficult.
  • the high-power white light-emitting diodes (LEDs) in the direct-type backlights avoid the generation of light-emitting diodes (LEDs), which make them fully mixed, requiring a high light box thickness, resulting in the thickness of the backlight module.
  • LEDs light-emitting diodes
  • the backlight phenomenon in which the luminance is extremely uneven is generally called a light dark grain (Mura). Therefore, it is necessary to develop a new type of backlight module structure to solve the problem that the backlight module cannot be uniformly mixed and the thickness of the light box is too large.
  • the purpose of this patent application is to provide a direct-lit backlight module structure to solve the problem that the backlight module cannot be uniformly mixed and the thickness of the light box is too large, and the number of light-emitting diodes (LEDs) used is reduced to reduce the production cost.
  • LEDs light-emitting diodes
  • the present patent application provides a direct type backlight module structure, comprising: a light box having a first height, the light box comprising a bottom plate; and a reflecting device disposed on the bottom plate
  • the reflecting device comprises a plurality of curved structural units, each curved structural unit is bent to form a second height and a middle bottom, and each of the curved structural units is disposed on the bottom plate at a predetermined interval; and a light source disposed on the reflecting device, each light source being disposed at the predetermined spacing, the predetermined spacing being greater than the first height of the light box; wherein each light source is disposed in each of the reflecting devices
  • the intermediate bottom of the arcuate structural unit causes light emitted by each of the light sources to form uniformly dispersed reflected light through the surface of each of the curved structural units.
  • the plurality of arcuate structural units are arranged in a matrix on the bottom plate of the light box.
  • the first height of the light box is between 0.3 and 1 times the predetermined spacing of the plurality of arcuate structural units.
  • each strip member being provided with a predetermined number of arcuate structural units and secured to the bottom plate of the light box.
  • the first height of the light box is greater than or equal to the second height of each of the arcuate structural units.
  • the material of the reflecting device comprises polyethylene terephthalate or polycarbonate.
  • the plurality of light sources are light emitting diodes.
  • a diffusing plate is disposed above the reflecting device for receiving the reflected light.
  • a diffusion film is further disposed on the diffusion plate for receiving the diffused reflected light.
  • a brightness enhancing film or a reflective brightness enhancing film is further included for receiving the reflected light.
  • each of the arcuate structural units includes an average curvature, and each of the light beams emitted by each of the light sources is passed through each of the second heights and the average curvature of each of the arcuate structural units.
  • the surface of the curved structural unit forms a uniformly dispersed reflected light.
  • the direct-lit backlight module structure of the patent application solves the problem that the backlight module cannot uniformly mix light and the thickness of the light box is too large, and reduces the number of light-emitting diodes (LEDs) used to reduce the production cost. And by adjusting the height and curvature of each curved structural unit, the reflecting device is optimized to make the emitted light more uniform, and the utilization rate of the light emitting diode (LED) light source is further improved, thereby further reducing the light emitting diode (LED). The use of the number and the reduction in the number of diffusers used to achieve cost reduction.
  • FIG. 1A is a plan view showing the structure of a backlight module in accordance with a first embodiment of the present patent application.
  • Figure 1B is a schematic cross-sectional view along line 1-1' of Figure 1A in accordance with the present patent application.
  • FIG. 2A is a plan view showing the structure of a backlight module in accordance with a second embodiment of the present patent application.
  • Figure 2B is a schematic cross-sectional view along line 2-2' of Figure 2A in accordance with the present patent application.
  • FIG. 1B is a plan view of a backlight module structure 100a according to a first embodiment of the present patent application
  • FIG. 1B is a schematic cross-sectional view along line 1-1' of FIG. 1A according to the present patent application.
  • the direct type backlight module structure 100a includes a light box 102, a reflecting device 104, a plurality of light sources 106, and a diffusion plate (Diffusion). Plate) 108, a diffusion film (Diffusion Film) 110 and a plurality of strips 114.
  • the light box 102 has a first height H1.
  • the light box 102 includes a bottom plate 102a and a side wall 102b joined to a periphery of the bottom plate 102a, the side wall 102b engaging the bottom plate 102b to form a first height H1 of the light box 102.
  • the light box 102 includes a bottom plate 102a that is bent at its periphery to form a first height H1 of the light box 102.
  • the reflecting device 104 is disposed on the bottom plate 102a, and the reflecting device 104 includes a plurality of curved structural units 112, each curved structural unit 112 is bent to form a second height H2 and a middle bottom 112a, and each The arc-shaped structural units 112 are disposed on the bottom plate 102a at a predetermined interval PD.
  • the plurality of arcuate structural units 112 are arranged in a matrix on the bottom plate 102a of the light box 102. As shown in FIG. 1A, for example, a matrix arrangement of 4*4 is provided, but is not limited thereto.
  • the first height H1 of the light box 102 is between 0.3 and 1 times the predetermined pitch PD of the plurality of curved structural units 112, in a preferred embodiment, for example 0.5 times.
  • the material of the reflective device 104 comprises polyethylene terephthalate (PET) or polycarbonate (PC).
  • the first height H1 of the light box is greater than or equal to the second height of each of the arcuate structural units.
  • the plurality of light sources 106 are disposed on the reflecting device 104, and each of the light sources 106 is disposed at the predetermined spacing PD, and the predetermined spacing PD is greater than the first height H1 of the light box 102.
  • each of the light sources 106 is a point light source, such as a light emitting diode (Light) Emitted Diode, LED).
  • Each of the light sources 106 is disposed at the intermediate bottom portion 112a of each of the arcuate structural units 112 of the reflecting device 104 such that light emitted by each of the light sources 106 forms a uniformly dispersed reflection through the surface of each of the curved structural units 112.
  • Light RL Light RL.
  • the reflecting means 104 is composed of a plurality of curved structural units 112, each of which is a cup structure, and then a light emitting diode (LED) is placed at the bottom of the curved structural unit 112 to emit light.
  • the reflection by the reflecting device 104 can be uniformly emitted, thereby achieving the purpose of reducing the height of the light box 102 and improving the uniformity of the backlight module structure 100a.
  • the diffusing plate 118a is disposed above the reflecting device 104 for receiving the reflected light RL.
  • the diffusion film 118b is disposed on the diffusion plate 118a for receiving the diffused reflected light RL.
  • Each strip member 114 is configured with a predetermined number of arcuate structural units 112 and is fixed to the bottom plate 102a of the light box 102. As shown, one strip member 114 is configured with four arcuate structural units 112, but is not limited thereto, such as more than four or less than four arcuate structural units 112. In another embodiment, the arcuate structural units 112 can be individually and independently disposed on the bottom plate 102a of the light box 102.
  • FIG. 2A is a plan view of a backlight module structure 100b according to a second embodiment of the present patent application
  • FIG. 2B is a schematic cross-sectional view along line 2-2' of FIG. 2A according to the present patent application.
  • the direct type backlight module structure 100b includes a light box 102, a reflecting device 104, a plurality of light sources 106, and a brightness enhancement film (Brightness). Enhancement Film, BEF) 120 and strip plate 114.
  • the light box 102 has a first height H1.
  • the light box 102 includes a bottom plate 102a and a side wall 102b joined to a periphery of the bottom plate 102a, the side wall 102b engaging the bottom plate 102b to form a first height H1 of the light box 102.
  • the reflecting device 104 is disposed on the bottom plate 102a, and the reflecting device 104 includes a plurality of curved structural units 112, each curved structural unit 112 is bent to form a second height H2 and a middle bottom 112a, and each The arc-shaped structural units 112 are disposed on the bottom plate 102a at a predetermined interval PD.
  • the plurality of arcuate structural units 112 are arranged in a matrix on the bottom plate 102a of the light box 102. As shown in FIG. 1A, for example, a matrix arrangement of 4*4 is provided, but is not limited thereto.
  • the first height H1 of the light box 102 is between 0.3 and 1 times the predetermined pitch PD of the plurality of curved structural units 112, in a preferred embodiment, for example 0.5 times.
  • the plurality of light sources 106 are disposed on the reflecting device 104, and each of the light sources 106 is disposed at the predetermined spacing PD, and the predetermined spacing PD is greater than the first height H1 of the light box 102.
  • Each of the light sources 106 is disposed at the intermediate bottom portion 112a of each of the arcuate structural units 112 of the reflecting device 104 such that light emitted by each of the light sources 106 forms a uniformly dispersed reflection through the surface of each of the curved structural units 112.
  • Light RL is disposed on the reflecting device 104, and each of the light sources 106 is disposed at the predetermined spacing PD, and the predetermined spacing PD is greater than the first height H1 of the light box 102.
  • Each of the light sources 106 is disposed at the intermediate bottom portion 112a of each of the arcuate structural units 112 of the reflecting device 104 such that light emitted by each of the light sources 106 forms a uniformly dispersed reflection through the surface of each of
  • the reflecting means 104 is composed of a plurality of curved structural units 112, each of which is a cup structure, and then a light emitting diode (LED) is placed at the bottom of the curved structural unit 112 to emit light.
  • the reflection by the reflecting device 104 can be uniformly emitted, thereby achieving the purpose of reducing the height of the light box 102 and improving the uniformity of the backlight module structure 100b.
  • the brightness enhancing film 120 is configured to receive the reflected light RL.
  • a reflective brightness enhancing film (Dual Brightness) Enhancement Film, The DBEF) 122 replaces the brightness enhancing film 120 to receive the reflected light RL.
  • Each strip member 114 is configured with a predetermined number of arcuate structural units 112 and is fixed to the bottom plate 102a of the light box 102.
  • the radius of curvature ⁇ 1 / k, which is expressed as the radius of any point on the curve XY, each radius of curvature corresponds to a curvature k.
  • each curved structural unit 112 of the reflecting device 104 reflects light to form a uniform reflected light RL, and passes through the brightness enhancing film 120 to the outside of the backlight module structure 100b by adjusting the height of each curved structural unit 112. And the curvature, so that the reflecting device 104 is optimized to make the emitted light more uniform, and the utilization rate of the light emitting diode (LED) light source is further improved, thereby further reducing the number of light emitting diodes (LEDs) used and reducing the number of diffusing plates used. Achieve the purpose of reducing costs.
  • LED light emitting diode
  • the direct-lit backlight module structure of the present patent application solves the problem that the backlight module cannot uniformly mix light and the thickness of the light box is too large, and reduces the number of light-emitting diodes (LEDs) used to reduce the production cost. And by adjusting the height and curvature of each arcuate structural unit, the reflecting device 104 is optimized to reduce the number of diffusing plates used.
  • LEDs light-emitting diodes

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Abstract

一种直下式背光模块结构（100a），包括灯箱（102），具有一第一高度（H1），所述灯箱（102）包括一底板（102a）；反射装置（104），设置于所述底板（102a）上，所述反射装置（104）包括若干弧形结构单元（112），每一弧形结构单元（112）弯折形成第二高度（H2）以及中间底部（112a），并且每一弧形结构单元（112）之间以一预定间距（PD）配置于所述底板（102a）上；以及若干光源（106），设置于所述反射装置（104）上，每一光源（106）之间以所述预定间距（PD）配置，所述预定间距（PD）大于所述灯箱（102）的所述第一高度（H1）；其中每一光源（106）设置于所述反射装置（104）的每一弧形结构单元（112）的所述中间底部（112a），使每一光源（106）发射的光线通过每一弧形结构单元（112）的表面形成均匀分散的反射光线（RL）。从而，解决了背光模块无法均匀混光以及灯箱（102）厚度过大的问题，并且减少了发光二极管（LED）的使用数量，以减少生产成本。

Description

直下式背光模块结构 技术领域
本专利申请涉及一种背光模块结构，且特别是涉及一种直下式背光模块结构。
 背景技术
背光模块用以提供液晶显示器的背光来源，是液晶显示器(Liquid Crystal Display, LCD)不可或缺的重要显示组件。现有技术中，直下式发光二极管(Light Emitted Diode, LED)的发光二极管(LED)背光源已由白光发光二极管(LED)取代传统的冷阴极灯管(Cold Cathode Fluorescent Lamp, CCFL)，白光发光二极管(LED)相对传统CCFL更加环保，且效率更高。但是相对应的光源也由原本的冷阴极灯管(CCFL)线光源变成了白光发光二极管(LED)点光源，欲达到均匀混光的难度变大。此外，直下式背光源的白光发光二极管(LED)，为了降低成本的需求，普遍采用大功率的发光二极管(LED)，所以使用的发光二极管(LED)颗数数量较少，致使发光二极管(LED)之间的排列间距较大，进一步让点光源的均匀混光难度加大。而且，直下式背光源中大功率的白光发光二极管(LED)为避免产生发光二极管(LED)亮暗纹(Mura)，使其充分混光，需要较高的灯箱厚度，致使背光模块的厚度过大，与现有液晶显示器的薄型化趋势背道而驰。其中辉度极不均匀的背光现象通常称为亮暗纹(Mura)。因此需要发展一种新式的背光模块结构，以解决上述背光模块无法均匀混光以及灯箱厚度过大的问题。
 技术问题
本专利申请的目的在于提供一种直下式背光模块结构，以解决背光模块无法均匀混光以及灯箱厚度过大的问题，并且减少发光二极管(LED)的使用数量，以减少生产成本。
 技术解决方案
为达到上述专利申请目的，本专利申请提供一种直下式背光模块结构，其包括：一灯箱，具有一第一高度，所述灯箱包括一底板；一反射装置，设置于所述底板上，所述反射装置包括若干弧形结构单元，每一弧形结构单元弯折形成一第二高度以及一中间底部，并且每一弧形结构单元之间以一预定间距配置于所述底板上；以及若干光源，设置于所述反射装置上，每一光源之间以所述预定间距配置，所述预定间距大于所述灯箱的所述第一高度；其中每一光源设置于所述反射装置的每一弧形结构单元的所述中间底部，使每一光源发射的光线通过每一弧形结构单元的表面形成均匀分散的反射光线。
在一实施例中，所述若干弧形结构单元以矩阵型式排列于所述灯箱的所述底板上。
在一实施例中，所述灯箱的所述第一高度介于所述若干弧形结构单元的所述预定间距的0.3倍至1倍之间。
在一实施例中，还包括若干条状板件，每一条状板件配置有一预定数量的弧形结构单元并且固接于所述灯箱的所述底板上。
在一实施例中，所述灯箱的所述第一高度大于或是等于所述每一弧形结构单元的所述第二高度。
在一实施例中，所述反射装置的材质包括聚对苯二甲酸乙二酯或是聚碳酸酯。
在一实施例中，所述若干光源为发光二极管。
在一实施例中，还包括一扩散板，设置于所述反射装置的上方，用以接收所述反射光线。
在一实施例中，还包括一扩散薄膜，设置于所述扩散板上，用以接收扩散的所述反射光线。
在一实施例中，还包括一增亮膜或是反射式增亮膜，用以接收所述反射光线。
在一实施例中，所述每一弧形结构单元包括一平均曲率，藉由调整每一弧形结构单元的所述第二高度以及所述平均曲率，使每一光源发射的光线通过每一弧形结构单元的表面形成均匀分散的反射光线。
 有益效果
本专利申请的直下式背光模块结构，以解决背光模块无法均匀混光以及灯箱厚度过大的问题，并且减少发光二极管(LED)的使用数量，以减少生产成本。并且藉由调整每一弧形结构单元的高度以及曲率，使反射装置优化，使得发射出的光线更加均匀，对发光二极管(LED)光源的利用率进一步提高，从而更进一步达到减低发光二极管(LED)使用数量和减少使用扩散板的数量，达到降低成本的目的。
 附图说明
图1A为根据本专利申请第一实施例中背光模块结构的平面视图。
图1B为根据本专利申请图1A中沿着线段1-1’的截面示意图。
图2A为根据本专利申请第二实施例中背光模块结构的平面视图。
图2B为根据本专利申请图2A中沿着线段2-2’的截面示意图。
 本发明的最佳实施方式
本专利申请说明书提供不同的实施例来说明本专利申请不同实施方式的技术特征。实施例中的各组件的配置是为了清楚说明本专利申请揭示的内容，并非用以限制本专利申请。在不同的图式中，相同的组件符号表示相同或相似的组件。
参考图1A以图1B，图1A为根据本专利申请第一实施例中背光模块结构100a的平面视图，图1B为根据本专利申请图1A中沿着线段1-1’的截面示意图。如图1A以及图1B所示，所述直下式背光模块结构100a包括一灯箱102、一反射装置104、若干光源106、一扩散板(Diffusion Plate)108、一扩散薄膜(Diffusion Film)110以及若干条状板件114。所述灯箱102具有一第一高度H1。在一实施例中，所述灯箱102包括一底板102a以及侧壁102b接合于所述底板102a的周缘，所述侧壁102b接合所述底板102b形成所述灯箱102的第一高度H1。在另一实施例中，所述灯箱102包括一底板102a，所述底板102a在其周缘弯折形成所述灯箱102的第一高度H1。
所述反射装置104设置于所述底板102a上，所述反射装置104包括若干弧形结构单元112，每一弧形结构单元112弯折形成一第二高度H2以及一中间底部112a，并且每一弧形结构单元112之间以一预定间距PD配置于所述底板102a上。在一实施例中，所述若干弧形结构单元112以矩阵型式排列于所述灯箱102的所述底板102a上。如图1A所示，例如是4*4的矩阵型式排列，但是不限于此。在一实施例中，所述灯箱102的所述第一高度H1介于所述若干弧形结构单元112的所述预定间距PD的0.3倍至1倍之间，在一优选实施例中例如是0.5倍。在一实施例中，反射装置104的材质包括聚对苯二甲酸乙二酯(PET)或是聚碳酸酯(PC)。在一实施例中，所述灯箱的所述第一高度H1大于或是等于所述每一弧形结构单元的所述第二高度。
所述若干光源106设置于所述反射装置104上，每一光源106之间以所述预定间距PD配置，所述预定间距PD大于所述灯箱102的所述第一高度H1。在一实施例中，所述每一光源106为点光源，例如是发光二极管(Light Emitted Diode, LED)。其中每一光源106设置于所述反射装置104的每一弧形结构单元112的所述中间底部112a，使每一光源106发射的光线通过每一弧形结构单元112的表面形成均匀分散的反射光线RL。换言之，反射装置104是由若干弧形结构单元112组成，每一弧形结构单元112为碗杯结构，然后将发光二极管(LED)放置在弧形结构单元112的中间底部，使其发出的光线经过反射装置104的反射能够均匀发射出去，从而达到减低灯箱102的高度和提高背光模组结构100a均匀度的目的。
所述扩散板118a设置于所述反射装置104的上方，用以接收所述反射光线RL。所述扩散薄膜118b设置于所述扩散板118a上，用以接收扩散的所述反射光线RL。所述每一条状板件114配置有一预定数量的弧形结构单元112并且固接于所述灯箱102的所述底板102a上。所示，一个条状板件114配置有4个弧形结构单元112，但是不限于此，例如多于4个或是少于4个弧形结构单元112。在另一实施例中，弧形结构单元112可个别独立地设置于所述灯箱102的底板102a上。
参考图2A以图2B，图2A为根据本专利申请第二实施例中背光模块结构100b的平面视图，图2B为根据本专利申请图2A中沿着线段2-2’的截面示意图。如图2A以及图2B所示，所述直下式背光模块结构100b包括一灯箱102、一反射装置104、若干光源106、一增亮膜(Brightness Enhancement Film, BEF)120以及条状板件114。所述灯箱102具有一第一高度H1。在一实施例中，所述灯箱102包括一底板102a以及侧壁102b接合于所述底板102a的周缘，所述侧壁102b接合所述底板102b形成所述灯箱102的第一高度H1。
所述反射装置104设置于所述底板102a上，所述反射装置104包括若干弧形结构单元112，每一弧形结构单元112弯折形成一第二高度H2以及一中间底部112a，并且每一弧形结构单元112之间以一预定间距PD配置于所述底板102a上。在一实施例中，所述若干弧形结构单元112以矩阵型式排列于所述灯箱102的所述底板102a上。如图1A所示，例如是4*4的矩阵型式排列，但是不限于此。在一实施例中，所述灯箱102的所述第一高度H1介于所述若干弧形结构单元112的所述预定间距PD的0.3倍至1倍之间，在一优选实施例中例如是0.5倍。
所述若干光源106设置于所述反射装置104上，每一光源106之间以所述预定间距PD配置，所述预定间距PD大于所述灯箱102的所述第一高度H1。其中每一光源106设置于所述反射装置104的每一弧形结构单元112的所述中间底部112a，使每一光源106发射的光线通过每一弧形结构单元112的表面形成均匀分散的反射光线RL。换言之，反射装置104是由若干弧形结构单元112组成，每一弧形结构单元112为碗杯结构，然后将发光二极管(LED)放置在弧形结构单元112的中间底部，使其发出的光线经过反射装置104的反射能够均匀发射出去，从而达到减低灯箱102的高度和提高背光模组结构100b均匀度的目的。
所述增亮膜120用以接收所述反射光线RL。在另一实施例中，以反射式增亮膜(Dual Brightness Enhancement Film, DBEF)122取代所述增亮膜120，以接收所述反射光线RL。所述每一条状板件114配置有一预定数量的弧形结构单元112并且固接于所述灯箱102的所述底板102a上。
具体来说，如图2A以及图2B所示，在每一弧形结构单元112中，其平均曲率k=Δψ/Δs定义为曲线XY上的平均弯曲程度，其中Δψ表示曲线XY上切线变化的角度，Δs表示曲线XY的弧长。曲率半径ρ=1/k，其表示为在曲线XY上任意一点的半径，每一曲率半径相对应一曲率k。当开口尺寸ODS固定不变时，若是第二高度H2越大，平均曲率k越大；当第二高度H2固定不变时，若是开口尺寸ODS越大，平均曲率k越小。
换言之，所述反射装置104的每一弧形结构单元112反射光线形成均匀的反射光线RL，穿出增亮膜120到达背光模块结构100b的外部，藉由调整每一弧形结构单元112的高度以及曲率，使反射装置104优化，使得发射出的光线更加均匀，对发光二极管(LED)光源的利用率进一步提高，从而更进一步达到减低发光二极管(LED)使用数量和减少使用扩散板的数量，达到降低成本的目的。
综上所述，本专利申请的直下式背光模块结构，以解决背光模块无法均匀混光以及灯箱厚度过大的问题，并且减少发光二极管(LED)的使用数量，以减少生产成本。并且藉由调整每一弧形结构单元的高度以及曲率，使反射装置104优化，以减少使用扩散板的数量。
虽然本专利申请已用较佳实施例揭露如上，然其并非用以限定本专利申请，本专利申请所属技术领域中具有通常知识者，在不脱离本专利申请的精神和范围内，当可作各种的更动与润饰，因此本专利申请的保护范围当视后附的权利要求范围所界定者为准。
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Claims (11)

  1. 一种直下式背光模块结构，其包括：
    一灯箱，具有一第一高度，所述灯箱包括一底板；
    一反射装置，设置于所述底板上，所述反射装置包括若干弧形结构单元，每一弧形结构单元弯折形成一第二高度以及一中间底部，并且每一弧形结构单元之间以一预定间距配置于所述底板上；以及
    若干光源，设置于所述反射装置上，每一光源之间以所述预定间距配置，所述预定间距大于所述灯箱的所述第一高度；
    其中每一光源设置于所述反射装置的每一弧形结构单元的所述中间底部，使每一光源发射的光线通过每一弧形结构单元的表面形成均匀分散的反射光线。
  2. 根据权利要求1所述的直下式背光模块结构，其中所述若干弧形结构单元以矩阵型式排列于所述灯箱的所述底板上。
  3. 根据权利要求1所述的直下式背光模块结构，其中所述灯箱的所述第一高度介于所述若干弧形结构单元的所述预定间距的0.3倍至1倍之间。
  4. 根据权利要求1所述的直下式背光模块结构，其中还包括若干条状板件，每一条状板件配置有一预定数量的弧形结构单元并且固接于所述灯箱的所述底板上。
  5. 根据权利要求1所述的直下式背光模块结构，其中所述灯箱的所述第一高度大于或是等于所述每一弧形结构单元的所述第二高度。
  6. 根据权利要求1所述的直下式背光模块结构，其中所述反射装置的材质包括聚对苯二甲酸乙二酯或是聚碳酸酯。
  7. 根据权利要求1所述的直下式背光模块结构，其中所述若干光源为发光二极管。
  8. 根据权利要求1所述的直下式背光模块结构，其中还包括一扩散板，设置于所述反射装置的上方，用以接收所述反射光线。
  9. 根据权利要求8所述的直下式背光模块结构，其中还包括一扩散薄膜，设置于所述扩散板上，用以接收扩散的所述反射光线。
  10. 根据权利要求1所述的直下式背光模块结构，其中还包括一增亮膜或是反射式增亮膜，用以接收所述反射光线。
  11. 根据权利要求1所述的直下式背光模块结构，其中所述每一弧形结构单元包括一平均曲率，藉由调整每一弧形结构单元的所述第二高度以及所述平均曲率，使每一光源发射的光线通过每一弧形结构单元的表面形成均匀分散的反射光线。
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