WO2018103162A1 - 局部控光的背光单元及显示装置 - Google Patents

局部控光的背光单元及显示装置 Download PDF

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Publication number
WO2018103162A1
WO2018103162A1 PCT/CN2016/113102 CN2016113102W WO2018103162A1 WO 2018103162 A1 WO2018103162 A1 WO 2018103162A1 CN 2016113102 W CN2016113102 W CN 2016113102W WO 2018103162 A1 WO2018103162 A1 WO 2018103162A1
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WIPO (PCT)
Prior art keywords
light source
reflective
reflector
backlight unit
disposed
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PCT/CN2016/113102
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English (en)
French (fr)
Inventor
丘永元
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深圳市华星光电技术有限公司
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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 US15/327,342 priority Critical patent/US20180217446A1/en
Publication of WO2018103162A1 publication Critical patent/WO2018103162A1/zh

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    • 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
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • G02F1/133601—Illuminating devices for spatial active dimming
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight unit and a display device for locally controlling light.
  • the liquid crystal display As the communication interface between people and information, the liquid crystal display is the current mainstream display mode. It has superior features such as high space utilization, low power consumption, no radiation, and low electromagnetic interference. It is widely used in information communication tools such as TVs, mobile phones, and tablets.
  • the industry proposes an HDR (High-Dynamic Range) image concept, which is capable of achieving greater display details and improving display effects. . Therefore, in order to achieve higher contrast, local dimming is required for the backlight of the product.
  • Local backlighting uses a backlight composed of hundreds of LEDs instead of the backlight.
  • the backlight LED can be based on the brightness of the image. Adjust, the brightness of the highlighted part of the screen image can be maximized, while the dark part can reduce the brightness, or even turn off, to achieve the best contrast. Thus, the reduction in brightness of the dark area reduces the power consumption of the backlight.
  • lens design is often used.
  • the main purpose of using the secondary lens is to increase the angle of light extraction, thereby improving the light mixing effect and reducing the number of LEDs.
  • an increase in the angle of light exiting means that the effect of the light control area is deteriorated. Therefore, how to realize the design of HDR products with less LED local light control needs to be solved.
  • the present invention provides a backlight unit and a display device that are locally light-controlled.
  • a backlight unit with local light control comprising a back plate having an inner surface as a reflective surface, an LED light source assembly disposed on the back plate, and an optical film set facing the LED light source assembly, the LED light source assembly a light source including an array and a secondary lens disposed above the light source; the back plate is divided a plurality of regions, at least one of the regions is provided with an elongated reflective member next to the light source; the reflective member includes at least one adjacent set of reflective surfaces, and the at least one adjacent set of reflective surfaces intersect to form a simultaneous orientation The edges of a plurality of secondary lenses.
  • the top of the secondary lens is a recessed "V" shaped notch.
  • each side of the "V" shaped notch of the secondary lens includes a plurality of serrated depressions.
  • the distribution density of the serrated recess is larger and larger from the middle of the "V" shaped notch toward both sides.
  • the top of the secondary lens is a reflecting surface.
  • the reflector includes a first reflector disposed on a first region of the backplate, and the first reflector includes two sets of reflective surfaces disposed rearwardly, the first reflector The two sets of reflective surfaces are surrounded by diamonds.
  • a plurality of the first reflectors surround the first region therein.
  • the backboard includes an open side panel for fixing the bottom plate of the LED light source assembly and the periphery of the bottom plate;
  • the reflective member further includes a second portion disposed in the second region of the back plate a reflector, the second area is an area of the edge of the backboard, and the second reflector comprises two reflective surfaces respectively connecting the bottom plate and the side plate.
  • the reflector includes a third reflector disposed in the first region of the backboard, and the third reflector includes two sets of reflective surfaces disposed opposite to each other, the first reflector The two sets of reflective surfaces and the backing plate are surrounded by a pentagon.
  • Another object of the present invention is to provide a display device including one of the locally controlled backlight units.
  • the invention provides an LED light source and a secondary lens on the back plate, and a reflective member having an adjacent reflective surface is arranged beside the LED light source and the secondary lens in the corresponding region, and the optical characteristics and the reflector of the secondary lens are utilized.
  • the resilience characteristics of the optical path can not only play a local light control role in a specific area, but also ensure optical taste, and effectively improve the competitiveness of the product.
  • FIG. 1 is a schematic structural view of a central portion of a backlight unit according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of an edge region of a backlight unit according to Embodiment 1 of the present invention.
  • FIG. 3 is a partial schematic structural view of a backlight unit according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural view of a central portion of a backlight unit according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural view of an edge region of a backlight unit according to Embodiment 2 of the present invention.
  • the display device of the present invention has a backlight unit that can realize local light control, and provides a backlight with a high optical taste for the display panel, the backlight unit includes a back plate whose inner surface is a reflective surface, and an LED light source assembly disposed on the back plate.
  • the LED light source assembly includes an array of light sources and a secondary lens disposed above the light source;
  • the back plate is divided into a plurality of regions, and at least one of the regions is provided with a long light source a strip-shaped reflector;
  • the reflector comprises at least one set of adjacent reflective surfaces, at least one set of adjacent reflective surfaces intersecting to form a plurality of secondary lenses facing a boundary of one of the regions on the backplane (ie facing one of the The edge of a row/column of secondary lenses on the boundary of the region.
  • the backlight unit of the present embodiment includes a back plate 10, an LED light source assembly 20 disposed on the back plate 10, an optical film set 30 spaced apart from the LED light source assembly 20, and an LED light source fixed on the surface of the back plate 10.
  • Reflector 40 next to component 20. 2 and 3 the back plate 10 includes an open side plate 12 for fixing the bottom plate 11 of the LED light source assembly 20 and the bottom plate 11, and the angle between the side plate 12 and the bottom plate 11 is an obtuse angle.
  • the inner surface of the bottom plate 11 and the side plate 12 of the back plate 10 are all reflective surfaces. Specifically, the surface of the back plate 10 may be coated with a reflective material or a reflective film may be adhered to the surface.
  • the LED light source assembly 20 includes an array of light sources 21 and a secondary lens 22 disposed above the light source 21; the bottom plate 11 of the back plate 10 is divided into a plurality of regions, and the light source 21 of the partial region is provided with a long strip of reflectors 40.
  • the top of the secondary lens 22 is a reflecting surface, specifically, the top of the secondary lens 22 is disposed as a recessed "V" shaped notch 220.
  • each side of the "V" shaped notch 220 of the secondary lens 22 includes a plurality of serrated recesses, and the distribution density of the serrated recesses is from the middle of the "V" shaped notch 220 toward the sides.
  • the light emitted by the light source 21 is reflected obliquely downward toward the two sides through the "V" shaped notch 220.
  • a part of the light is reflected by the bottom plate 11 to the light emitting surface, and a part of the light is reflected by the bottom plate 11 to the reflecting member 40, and a part of the light is directly irradiated.
  • To the reflector 40, and to the reflector 40 The light is reflected and then emitted toward the light surface to maximize the use of light.
  • each side of the "V" shaped notch 220 includes a plurality of serrated depressions, and the distribution density of the serrated depressions is larger from the middle of the "V" shaped notch 220 toward the sides, the light reflected by the top of the secondary lens 22 is reflected. More uniform, the backlight unit has better light output consistency.
  • the reflector 40 includes a first reflector 41 disposed in a first region of the backplane 10 and a second reflector 42 disposed in a second region.
  • the first reflector 41 includes two sets of reflective surfaces disposed opposite to each other.
  • the two sets of reflecting surfaces of a reflector 41 enclose a diamond shape (ie, the first reflecting member 40 has a diamond shape in a cross section perpendicular to the length direction), and the plurality of first reflecting members 40 surround the first region therein (as shown in FIG. 3).
  • the second area is an area of the edge of the backboard 10
  • the first area is an area away from the side wall of the backboard 10.
  • the second reflecting member 42 includes two reflecting surfaces respectively connecting the bottom plate 11 and the side plate 12, and the free end of the reflecting surface of the second reflecting member 42 connecting the side plates 12 completely wraps the side plate 12 until extending to the optical film group 30. Fixed end.
  • the first reflecting member 40 here is a hollow white plastic frame, which is convenient to fix and light in weight.
  • the diffusion plate 50 is disposed on the back surface of the film group 30, and the light that is directed to the film group 30 is first lighted through the diffusion plate 50, and the light uniformity can be further improved.
  • the angle a1 between the two reflective surfaces of the bottom of the first reflector 41 and the bottom plate 11 is greater than 50°, preferably 57°, and each reflective surface of the first reflector 41
  • the height in the longitudinal direction and the width in the lateral direction are both 7 mm; and the angle of the reflecting surface at the bottom of the second reflecting member 42 is less than 45° with the bottom plate 11, and the reflecting surface of the bottom faces the middle portion of the bottom plate 11.
  • the backlight unit of this embodiment is suitable for a display device with high light control precision, and the size of the light control area is about 50 mm*55 mm.
  • the fixing manner of the reflecting member 40 can be flexibly designed according to different fixing regions.
  • the portion that can be easily fixed can be fixed by sticking or screw fixing, and can be fixed by a buckle at an inconvenient fixed portion such as an edge.
  • the reflector 40 of the present embodiment includes a third reflecting member 43 and a second region (edge region) provided in the first region (non-edge region) of the backing plate 10.
  • the second reflecting member 42 and the third reflecting member 43 comprise two sets of reflective surfaces disposed opposite to each other.
  • the two sets of reflecting surfaces of the first reflecting member 41 and the backing plate 10 enclose a pentagon, that is, the bottom of the third reflecting member 43.
  • the reflective surfaces of the two different sides are not connected but are separated from one another.
  • the angle between the third reflecting member 43 and the bottom plate 11 is less than 45°, and the angle between the reflecting surface of the bottom portion of the second reflecting member 42 and the bottom plate 11 is less than 45°, preferably the angle between the third reflecting member 43 and the bottom plate 11 is
  • the angle of reflection of the bottom of the second reflector 42 is equal to the angle of the bottom plate 11.
  • the light control area of this embodiment is larger than that of Embodiment 1, and is about 100 mm*100 mm or more, and the accuracy is lower than that of the embodiment.
  • the specific shape of the reflector 40 can be set according to requirements, and can be changed according to the position of the light control region.
  • the first light reflecting member 41 and the second light reflecting member 42 of Embodiment 1 can be used in the portion where the light control area is small.
  • the second reflecting member shown in Embodiment 2 can be used in the portion where the light control area is large.
  • 42 and a third reflecting member 43 in the portion where the light control area is small.
  • the invention provides an LED light source and a secondary lens on the back plate, and a reflective member having an adjacent reflective surface is arranged beside the LED light source and the secondary lens in the corresponding region, and the optical characteristics and the reflector of the secondary lens are utilized.
  • the resilience characteristics of the optical path can not only play a local light control role in a specific area, but also ensure optical taste, and effectively improve the competitiveness of the product.

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

一种局部控光的背光单元和显示装置，包括内表面为反射面的背板（10）、设置在背板（10）上的LED光源组件（20）以及与LED光源组件（20）正对的光学膜片组（30），LED光源组件（20）包括阵列设置的光源（21）和罩设于光源（21）上方的二次透镜（22）；背板（10）被划分为多个区域，至少一个区域的光源（21）旁设有条状的反光件（40）；反光件（40）包括至少一组相邻的反光面，该至少一组相邻的反光面相交形成同时朝向多个二次透镜（22）的棱边。通过在背板（10）上设置有LED光源（21）和二次透镜（22），并在相应区域的LED光源（21）和二次透镜（22）旁合理布置具有相邻反光面的反光件（40），借助二次透镜（22）的光学特性和反光件（40）的光路回弹特性，既可以起到特定区域的局部控光作用，又能保证光学品味，提高了产品的竞争力。

Description

局部控光的背光单元及显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种局部控光的背光单元及显示装置。
背景技术
液晶显示器作为人与信息的沟通界面，是当前主流的显示方式。它具有高空间利用率、低功耗、无辐射以及低电磁干扰等优越的特性，在电视、手机、平板电脑等信息沟通工具中广泛使用。
随着液晶显示器的应用领域进一步加大，为进一步提高显示器的显示效果，业界提出HDR(High-Dynamic Range，即高动态范围)图像概念，该概念在于可以实现更大可显示细节，提高显示效果。因此，为实现更高的对比度，对产品的背光提出了局部控光(local dimming)的需求，局部控光即利用数百个LED组成的背光源代替背光灯，背光LED可根据图像的明暗进行调节，显示幕图像中高亮的部分的亮度可以达到最大，而同时黑暗的部分可以降低亮度，甚至关闭，以达到最佳的对比度。这样，暗区亮度的降低就降低了背光的功耗。
目前业界的直下式背光设计中，常采用透镜设计。选用二次透镜的搭配主要目的是实现出光角度的增加，从而提高混光效果、减少LED数量。但是在局部控光设计中，出光角度的增加意味着控光区域效果变差。于是，如何利用更少的LED局部控光的需求实现HDR产品的设计成为需要解决的一个难题。
发明内容
鉴于现有技术存在的不足，本发明提供了一种局部控光的背光单元及显示装置。
为了实现上述的目的，本发明采用了如下的技术方案：
一种局部控光的背光单元，包括内表面为反射面的背板、设置在所述背板上的LED光源组件以及与所述LED光源组件正对的光学膜片组，所述LED光源组件包括阵列设置的光源和罩设于所述光源上方的二次透镜；所述背板被划分 为多个区域，至少一个区域的所述光源旁设有长条状的反光件；所述反光件包括至少一组相邻的反光面，所述至少一组相邻的反光面相交形成同时朝向多个二次透镜的棱边。
作为其中一种实施方式，所述二次透镜的顶部为凹陷设置的“V”形缺口。
作为其中一种实施方式，所述二次透镜的“V”形缺口的每侧包括若干条锯齿状凹陷。
作为其中一种实施方式，所述锯齿状凹陷的分布密度自所述“V”形缺口中部朝两侧越来越大。
作为其中一种实施方式，所述二次透镜的顶部为反射面。
作为其中一种实施方式，所述反光件包括设于所述背板第一区域的第一反光件，所述第一反光件包括两组背向设置的反光面，所述第一反光件的两组反光面围成菱形。
作为其中一种实施方式，多条所述第一反光件将所述第一区域围绕在其中。
作为其中一种实施方式，所述背板包括用于固定所述LED光源组件的底板和底板四周的敞口的侧板；所述反光件还包括设于所述背板第二区域的第二反光件，所述第二区域为所述背板边缘的区域，所述第二反光件包括分别连接所述底板和所述侧板的两个反射面。
作为其中一种实施方式，所述反光件包括设于所述背板第一区域的第三反光件，所述第三反光件包括两组背向设置的反光面，所述第一反光件的两组反光面与所述背板围成五边形。
本发明的另一目的在于提供一种显示装置，包括其中一种所述的局部控光的背光单元。
本发明通过在背板上设置有LED光源和二次透镜，并在相应区域的LED光源和二次透镜旁合理布置具有相邻的反光面的反光件，借助二次透镜的光学特性和反光件的光路回弹特性，既可以起到特定区域的局部控光作用，又能保证光学品味，有效提高了产品的竞争力。
附图说明
图1为本发明实施例1的背光单元的中部区域的结构示意图。
图2为本发明实施例1的背光单元的边缘区域的结构示意图。
图3为本发明实施例1的背光单元的局部结构示意图。
图4为本发明实施例2的背光单元的中部区域的结构示意图。
图5为本发明实施例2的背光单元的边缘区域的结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明的显示装置具有可以实现局部控光的背光单元，为显示面板提供具有较高光学品味的背光源，该背光单元包括内表面为反射面的背板、设置在背板上的LED光源组件以及与LED光源组件正对的光学膜片组，LED光源组件包括阵列设置的光源和罩设于光源上方的二次透镜；背板被划分为多个区域，至少一个区域的光源旁设有长条状的反光件；反光件包括至少一组相邻的反光面，至少一组相邻的反光面相交形成朝向背板上的其中某一个区域边界的多个二次透镜(即朝向其中某一区域边界上的一排/一列二次透镜)的棱边。
实施例1
参阅图1，本实施例的背光单元包括背板10、设置在背板10上的LED光源组件20、与LED光源组件20间隔设置的光学膜片组30以及固定在背板10表面、LED光源组件20旁的反光件40。其中，结合图2和图3所示，背板10包括用于固定LED光源组件20的底板11和底板11四周的敞口的侧板12，侧板12与底板11的夹角为钝角。背板10的底板11和侧板12的内表面均为反射面，具体可以将背板10表面涂覆一层反光材料或者表面粘贴一层反射片。
LED光源组件20包括阵列设置的光源21和罩设于光源21上方的二次透镜22；背板10的底板11被划分为多个区域，部分区域的光源21旁设有长条状的反光件40。其中，二次透镜22的顶部为反射面，具体是将二次透镜22的顶部设置成凹陷的“V”形缺口220。作为其中一种较佳的实施方式，二次透镜22的“V”形缺口220的每侧包括若干条锯齿状凹陷，且锯齿状凹陷的分布密度自“V”形缺口220中部朝两侧越来越大，使得经光源21发出的光线经过“V”形缺口220朝两侧斜下方反射，一部分光线经底板11反射至出光面，一部分光线经底板11反射至反光件40，一部分光线直接照射至反光件40，而射出至反光件40 的光线经过反射后朝出光面射出，实现光线的最大化利用。由于“V”形缺口220的每侧包括若干条锯齿状凹陷，且锯齿状凹陷的分布密度自“V”形缺口220中部朝两侧越来越大，使得经二次透镜22顶部反射的光线更均匀，背光单元的出光一致性更好。
本实施例中，反光件40包括设于背板10第一区域的第一反光件41和第二区域的第二反光件42，第一反光件41包括两组背向设置的反光面，第一反光件41的两组反光面围成菱形(即第一反光件40在垂直于长度方向的断面呈菱形)，多条第一反光件40将第一区域围绕在其中(如图3所示)。这里，第二区域为背板10边缘的区域，第一区域为远离背板10的侧壁的区域。第二反光件42包括分别连接底板11和侧板12的两个反射面，第二反光件42连接侧板12的反射面的自由端完全包裹侧板12，直至延伸至光学膜片组30的固定端。这里的第一反光件40为中空的白色塑料框，固定方便且重量轻。
进一步地，扩散板50设置在学膜片组30的背面，射向学膜片组30的光首先经过扩散板50匀光后才进入，可以进一步提高光线均匀度。
如图2所示，本实施例中，第一反光件41底部的两个反光面与底板11的夹角a1大于50°，最好是57°，第一反光件41的每个反光面的纵向上的高度和横向上宽度均为7mm；而第二反光件42底部的反光面与底板11的夹角小于45°，且该底部的反光面朝向底板11的中部。该实施例的背光单元适用于控光精度较高的显示装置，控光区域大小约为50mm*55mm。
另外，反光件40的固定方式可以根据不同的固定区域灵活设计，例如，可以选择容易固定的部位采用粘贴或螺钉固定的方式固定，在不方便固定的部位如边缘处采用卡扣的方式固定。
实施例2
如图4和图5所示，与实施例1不同，本实施例的反光件40包括设于背板10第一区域(非边缘区域)的第三反光件43和第二区域(边缘区域)的第二反光件42，第三反光件43包括两组背向设置的反光面，第一反光件41的两组反光面与背板10围成五边形，即第三反光件43底部的两个不同侧的反光面并不相接，而是相互隔开。第三反光件43与底板11的夹角小于45°，且第二反光件42底部的反光面与底板11的夹角小于45°，最好是第三反光件43与底板11的夹角与第二反光件42底部的反光面与底板11的夹角相等。本实施例的控光区域较实施例1更大，约为100mm*100mm以上，精度较实施例有所下降。
其中，反光件40的具体形状可依据需要进行设置，并可随需要控光区域位置的不同而变化。例如，在控光区域较小的部位，可以采用实施例1的第一反光件41和第二反光件42，在控光区域较大的部位，可以采用实施例2所示的第二反光件42和第三反光件43。
本发明通过在背板上设置有LED光源和二次透镜，并在相应区域的LED光源和二次透镜旁合理布置具有相邻的反光面的反光件，借助二次透镜的光学特性和反光件的光路回弹特性，既可以起到特定区域的局部控光作用，又能保证光学品味，有效提高了产品的竞争力。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (20)

  1. 一种局部控光的背光单元，其中，包括内表面为反射面的背板、设置在所述背板上的LED光源组件以及与所述LED光源组件正对的光学膜片组，所述LED光源组件包括阵列设置的光源和罩设于所述光源上方的二次透镜；所述背板被划分为多个区域，至少一个区域的所述光源旁设有长条状的反光件；所述反光件包括至少一组相邻的反光面，所述至少一组相邻的反光面相交形成同时朝向多个二次透镜的棱边。
  2. 根据权利要求1所述的局部控光的背光单元，其中，所述二次透镜的顶部为凹陷设置的“V”形缺口。
  3. 根据权利要求2所述的局部控光的背光单元，其中，所述二次透镜的“V”形缺口的每侧包括若干条锯齿状凹陷。
  4. 根据权利要求3所述的局部控光的背光单元，其中，所述锯齿状凹陷的分布密度自所述“V”形缺口中部朝两侧越来越大。
  5. 根据权利要求2所述的局部控光的背光单元，其中，所述二次透镜的顶部为反射面。
  6. 根据权利要求5所述的局部控光的背光单元，其中，所述反光件包括设于所述背板第一区域的第一反光件，所述第一反光件包括两组背向设置的反光面，所述第一反光件的两组反光面围成菱形。
  7. 根据权利要求6所述的局部控光的背光单元，其中，多条所述第一反光件将所述第一区域围绕在其中。
  8. 根据权利要求5所述的局部控光的背光单元，其中，所述背板包括用于固定所述LED光源组件的底板和底板四周的敞口的侧板；所述反光件还包括设于所述背板第二区域的第二反光件，所述第二区域为所述背板边缘的区域，所述第二反光件包括分别连接所述底板和所述侧板的两个反射面。
  9. 根据权利要求5所述的局部控光的背光单元，其中，所述反光件包括设于所述背板第一区域的第三反光件，所述第三反光件包括两组背向设置的反光面，所述第一反光件的两组反光面与所述背板围成五边形。
  10. 一种显示装置，其中，包括局部控光的背光单元，所述局部控光的背光单元包括内表面为反射面的背板、设置在所述背板上的LED光源组件以及与 所述LED光源组件正对的光学膜片组，所述LED光源组件包括阵列设置的光源和罩设于所述光源上方的二次透镜；所述背板被划分为多个区域，至少一个区域的所述光源旁设有长条状的反光件；所述反光件包括至少一组相邻的反光面，所述至少一组相邻的反光面相交形成同时朝向多个二次透镜的棱边。
  11. 根据权利要求10所述的显示装置，其中，所述二次透镜的顶部为凹陷设置的“V”形缺口。
  12. 根据权利要求11所述的显示装置，其中，所述二次透镜的“V”形缺口的每侧包括若干条锯齿状凹陷。
  13. 根据权利要求12所述的显示装置，其中，所述锯齿状凹陷的分布密度自所述“V”形缺口中部朝两侧越来越大。
  14. 根据权利要求11所述的显示装置，其中，所述二次透镜的顶部为反射面。
  15. 根据权利要求14所述的显示装置，其中，所述反光件包括设于所述背板第一区域的第一反光件，所述第一反光件包括两组背向设置的反光面，所述第一反光件的两组反光面围成菱形。
  16. 根据权利要求15所述的显示装置，其中，多条所述第一反光件将所述第一区域围绕在其中。
  17. 根据权利要求14所述的显示装置，其中，所述背板包括用于固定所述LED光源组件的底板和底板四周的敞口的侧板；所述反光件还包括设于所述背板第二区域的第二反光件，所述第二区域为所述背板边缘的区域，所述第二反光件包括分别连接所述底板和所述侧板的两个反射面。
  18. 根据权利要求14所述的显示装置，其中，所述反光件包括设于所述背板第一区域的第三反光件，所述第三反光件包括两组背向设置的反光面，所述第一反光件的两组反光面与所述背板围成五边形。
  19. 根据权利要求12所述的显示装置，其中，所述二次透镜的顶部为反射面。
  20. 一种显示装置，其中，包括局部控光的背光单元，所述局部控光的背光单元包括内表面为反射面的背板、设置在所述背板上的LED光源组件以及与所述LED光源组件正对的光学膜片组，所述LED光源组件包括阵列设置的光源 和罩设于所述光源上方的二次透镜；所述背板被划分为多个区域，至少一个区域的所述光源旁设有长条状的反光件；所述反光件包括至少一组相邻的反光面，所述至少一组相邻的反光面相交形成同时朝向多个二次透镜的棱边；所述二次透镜的顶部为凹陷设置的“V”形缺口，且所述“V”形缺口的每侧包括若干条锯齿状凹陷，所述锯齿状凹陷的分布密度自所述“V”形缺口中部朝两侧越来越大，所述反光件包括设于所述背板第一区域的第一反光件，所述第一反光件包括两组背向设置的反光面，所述第一反光件的两组反光面围成菱形。
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Publication number Priority date Publication date Assignee Title
US10802194B2 (en) * 2018-01-24 2020-10-13 Huizhou China Star Optoelectronics Technology Co., Ltd. Direct type reflective sheet structure and backlight module
CN108459436A (zh) * 2018-01-24 2018-08-28 惠州市华星光电技术有限公司 一种直下式反射片结构及背光模组
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012132707A1 (ja) * 2011-03-25 2012-10-04 シャープ株式会社 発光装置、照明装置、および表示装置
WO2012132705A1 (ja) * 2011-03-25 2012-10-04 シャープ株式会社 発光装置、照明装置、および表示装置
CN103032817A (zh) * 2012-12-14 2013-04-10 京东方科技集团股份有限公司 匀光透镜、使用该匀光透镜的背光模组和显示装置
CN103548161A (zh) * 2011-03-25 2014-01-29 夏普株式会社 发光装置、照明装置以及显示装置
CN103703578A (zh) * 2011-07-20 2014-04-02 夏普株式会社 发光装置、照明装置和显示装置
CN204647984U (zh) * 2015-04-15 2015-09-16 瑞仪光电(苏州)有限公司 背光模组
CN104976584A (zh) * 2014-04-10 2015-10-14 Lg伊诺特有限公司 光学元件和包括其的背光单元

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6598998B2 (en) * 2001-05-04 2003-07-29 Lumileds Lighting, U.S., Llc Side emitting light emitting device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012132707A1 (ja) * 2011-03-25 2012-10-04 シャープ株式会社 発光装置、照明装置、および表示装置
WO2012132705A1 (ja) * 2011-03-25 2012-10-04 シャープ株式会社 発光装置、照明装置、および表示装置
CN103548161A (zh) * 2011-03-25 2014-01-29 夏普株式会社 发光装置、照明装置以及显示装置
CN103703578A (zh) * 2011-07-20 2014-04-02 夏普株式会社 发光装置、照明装置和显示装置
CN103032817A (zh) * 2012-12-14 2013-04-10 京东方科技集团股份有限公司 匀光透镜、使用该匀光透镜的背光模组和显示装置
CN104976584A (zh) * 2014-04-10 2015-10-14 Lg伊诺特有限公司 光学元件和包括其的背光单元
CN204647984U (zh) * 2015-04-15 2015-09-16 瑞仪光电(苏州)有限公司 背光模组

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