WO2020000729A1 - 反射片、侧入式背光模组及液晶显示器 - Google Patents

反射片、侧入式背光模组及液晶显示器 Download PDF

Info

Publication number
WO2020000729A1
WO2020000729A1 PCT/CN2018/107778 CN2018107778W WO2020000729A1 WO 2020000729 A1 WO2020000729 A1 WO 2020000729A1 CN 2018107778 W CN2018107778 W CN 2018107778W WO 2020000729 A1 WO2020000729 A1 WO 2020000729A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
backlight module
convex structure
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/107778
Other languages
English (en)
French (fr)
Inventor
孙立志
徐向阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
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 Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US16/319,314 priority Critical patent/US20210116629A1/en
Publication of WO2020000729A1 publication Critical patent/WO2020000729A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide

Definitions

  • the present invention relates to the field of display technology, and in particular, to a reflective sheet, an edge-lit backlight module, and a liquid crystal display.
  • Liquid crystal display (Liquid Crystal Display, LCD) has many advantages such as thin body, power saving, no radiation, etc., and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen.
  • LCD Liquid Crystal Display
  • PDA personal digital assistant
  • digital camera computer screen or laptop screen.
  • liquid crystal display devices which include a casing, a liquid crystal panel disposed in the casing, and a backlight module (Backlight module) disposed in the casing.
  • Backlight module backlight module
  • the backlight module is divided into a side-type backlight module and a direct-type backlight module according to the incident position of the light source.
  • the direct type backlight module is a light source such as a cathode fluorescent lamp tube or a light emitting diode disposed behind a liquid crystal panel, and a surface light source is directly provided to the liquid crystal panel.
  • the light source module LED light bar is arranged at the edge of the back panel behind the liquid crystal panel side. The light emitted by the LED light bar enters the light guide plate from the light entrance surface of the light guide plate side, and is reflected and diffused. The light is emitted from the light-emitting surface of the light guide plate, and then passes through the optical film group to form a surface light source to be provided to the liquid crystal panel.
  • the structure of a conventional side-type backlight module includes a light guide plate 150, an LED light source 130 disposed on the side of the light guide plate 150, a light reflector 170, a dot 180 for reflection and scattering on the light guide plate 150, and a light guide.
  • the reflection sheet 140 below the light plate, the optical film group 160 above the light exit surface of the light guide plate 150, and the like.
  • the conventional side-entry LED backlight module after the light enters the light guide plate 150, the light is reflected and scattered by the dots 180 on the bottom surface of the light guide plate 150 and finally exits the light guide surface of the light guide plate 150, as shown in FIG.
  • the shape and distribution of the dots 180 are planar, the reflection and scattering of light after passing through the dots 180 is insufficient, the utilization ratio of the light source is low, and the uniformity of the backlight emission is limited.
  • An object of the present invention is to provide a reflective sheet capable of reflecting light in various directions and improving light utilization efficiency.
  • the object of the present invention is also to provide a side-entry backlight module.
  • the utilization rate of the light emitted from the backlight source is high, and the uniformity of the light output from the light guide plate is good.
  • Another object of the present invention is to provide a liquid crystal display.
  • the utilization rate of the light emitted from the backlight source is high, and the uniformity of the light emitted from the light guide plate is good.
  • the present invention provides a reflective sheet including: a reflective sheet body and a plurality of first convex structures provided on the reflective sheet body.
  • the size and distribution density of the plurality of first convex structures gradually increase from one side to the other side of the reflection sheet body, or the size and distribution density of the plurality of first convex structures gradually increase from both sides of the reflection sheet body to the reflection sheet.
  • the center of the body gradually increases.
  • the present invention also provides a side-type backlight module, which includes a back plate and a light source, a reflection sheet, and a light guide plate provided inside the back plate;
  • the light source is disposed on one side of the light guide plate; the reflection sheet is provided between the back plate and the light guide plate, and a plurality of first convex structures are provided on a surface of the reflection sheet facing the light guide plate.
  • the surface of the light guide plate facing the reflection sheet is provided with a plurality of second convex structures protruding toward a side away from the reflection sheet.
  • the number of the light sources is one.
  • On the reflecting sheet as the distance from the light source increases, the size and distribution density of the first convex structure gradually increase; on the light guide plate, as the distance from the light source increases, The size and distribution density of the second convex structure gradually increase.
  • Each of the first convex structures on the reflective sheet is aligned with each of the second convex structures on the light guide plate, and the sizes of the first convex structures and the second convex structures aligned with each other are the same.
  • the light guide plate is a wedge-shaped light guide plate, and a thickness of a side near the light source is greater than a thickness of a side far from the light source, and the reflection sheet is parallel to a surface of the light guide plate having a plurality of second convex structures.
  • the number of the light sources is two and is disposed opposite to the two ends of the light guide plate.
  • the size and distribution density of the first convex structure gradually increase;
  • the size and distribution density of the second convex structure gradually increase.
  • Each of the first convex structures on the reflective sheet is aligned with each of the second convex structures on the light guide plate, and the sizes of the first convex structures and the second convex structures aligned with each other are the same.
  • the back plate includes a bottom plate and a plurality of side plates, and the plurality of side plates are vertically connected to edges of the bottom plate;
  • the light guide plate includes a light exit surface on the side of the bottom plate away from the back plate, a bottom surface on the side of the bottom plate near the back plate, and a light incident surface on one end of the side plate near the back plate.
  • the present invention also provides a liquid crystal display including a backlight module, a liquid crystal panel provided above the backlight module, a plastic frame connected between the backlight module and the liquid crystal panel, and covering the liquid crystal.
  • a liquid crystal display including a backlight module, a liquid crystal panel provided above the backlight module, a plastic frame connected between the backlight module and the liquid crystal panel, and covering the liquid crystal. The edge area of the panel, the shell of the backlight module and the plastic frame;
  • the backlight module is the above-mentioned side-type backlight module.
  • the reflective sheet of the present invention includes a reflective sheet body and a plurality of first convex structures provided on the reflective sheet body, which can reflect light in all directions and improve the utilization rate of light.
  • the side-type backlight module of the present invention includes a back plate, a light source provided inside the back plate, a reflection sheet, and a light guide plate, the light source is provided on one side of the light guide plate, and the reflection sheet is provided on the side. Between the back plate and the light guide plate, a plurality of first convex structures are provided on a surface of the side of the light guide plate facing the light guide plate, and a plurality of surfaces facing away from the reflection plate are provided on a surface of the light guide plate side facing the light guide plate.
  • the second convex structure protruding on one side, the first convex structure and the second convex structure can reflect the light in all directions, so that more light enters the light guide plate and exits from the light exit surface of the light guide plate, thereby improving the utilization rate of light and the uniform emission. Sex.
  • the liquid crystal display of the present invention includes the above-mentioned side-type backlight module.
  • a plurality of first convex structures are provided on a surface of a side of the light guide plate facing the light guide plate, and a plurality of surfaces are provided on a surface of the light guide plate facing the light guide plate.
  • the second convex structure protruding toward the side away from the reflecting sheet, the first convex structure and the second convex structure can reflect light in all directions, so that more light enters the light guide plate and exits from the light exit surface of the light guide plate, thereby improving light utilization. Rate and emission uniformity to improve the panel display effect.
  • FIG. 1 is a schematic structural diagram of a side-type backlight module in the prior art
  • FIG. 2 is a schematic diagram of a light path of a side-type backlight module in the prior art
  • FIG. 3 is a schematic structural diagram of a reflective sheet of the present invention.
  • FIGS. 4 and 5 are schematic diagrams of a first convex structure of a reflective sheet of the present invention.
  • FIG. 6 is a schematic structural diagram of a first embodiment of a side-type backlight module according to the present invention.
  • FIG. 7 is a schematic structural diagram of a light guide plate in a first embodiment of a side-type backlight module according to the present invention.
  • FIG. 8 is a schematic structural diagram of a second embodiment of a side-type backlight module according to the present invention.
  • FIG. 9 is a schematic structural diagram of a light guide plate in a second embodiment of a side-type backlight module according to the present invention.
  • FIG. 10 is a schematic structural diagram of a first embodiment of a liquid crystal display according to the present invention.
  • FIG. 11 is a schematic structural diagram of a second embodiment of a liquid crystal display according to the present invention.
  • the reflective sheet provided by the present invention includes a reflective sheet body 141 and a plurality of first convex structures 17 provided on the reflective sheet body 141.
  • the size and distribution density of the plurality of first convex structures 17 gradually increase from one side to the other side of the reflective sheet body 141, or the size of the plurality of first convex structures 17. And the distribution density gradually increase from both sides of the reflection sheet body 141 toward the center of the reflection sheet body 141.
  • the plurality of first convex structures 17 can reflect light in various directions, thereby improving light utilization efficiency.
  • FIG. 6 to FIG. 7 and FIG. 4 is a first embodiment of an edge-type backlight module provided by the present invention, including a back plate 11 and a light source 13, a reflection sheet 14, The light guide plate 15 and the optical film group 16.
  • the light source 13 is disposed on one side of the light guide plate 15.
  • the light emitted from the light source 13 enters the light guide plate 15 and is emitted after being refracted.
  • the reflection sheet 14 is disposed between the back plate 11 and the light guide plate 15.
  • the optical film group 16 includes a lower diffusion sheet 161, a prism sheet 162, and an upper diffusion sheet 163 which are sequentially stacked on the light guide plate 15.
  • a plurality of first convex structures 17 protruding on the light guide plate 15 side are provided on a surface of the reflection sheet 14 facing the light guide plate 15, and a surface of the light guide plate 15 facing the reflection sheet 14
  • a plurality of second convex structures 18 protruding from a side away from the reflective sheet 14 is provided on the second convex structures 18.
  • the arrangement of the first convex structure 17 can reflect light from various directions, so that light enters the light guide plate 15, and the arrangement of the second convex structure 18 can reflect light from various directions inside the light guide plate 15, so that more light can pass from the light guide plate 15. Emission, reducing total reflection, thereby improving light utilization and uniformity.
  • the back plate 11 includes a bottom plate 111 and a plurality of side plates 112, and the plurality of side plates 112 are vertically connected to the edge of the bottom plate 111.
  • the light guide plate 15 includes a light exit surface on a side away from the bottom plate 111 of the back plate 11. 152.
  • the light source 13 is disposed on the side plate 112 of the back plate 11 and the light incident surface of the light guide plate 15.
  • the reflection sheet 14 is disposed between the bottom plate 111 of the back plate 11 and the light guide plate 15.
  • the first convex structure 17 is a sphere, which may be an incomplete sphere or an incomplete ellipsoid, preferably a hemisphere or a semi-ellipsoid, and the second convex structure 18 may be a sphere. Specifically, it may be an incomplete sphere or an incomplete ellipsoid, preferably a hemisphere or a hemisphere, and the hemisphere or hemisphere can reflect each of the opposite rays of light.
  • the shapes of the first convex structure 17 and the second convex structure 18 may also be other shapes, such as a square, which is not limited in the present invention. Further preferably, the changing trends of the first convex structure 17 and the second convex structure 18 are the same.
  • the light guide plate 15 is a wedge-shaped light guide plate, which is close to the light source 13.
  • the thickness on the side is greater than the thickness on the side far from the light source 13. Therefore, the surface of the light guide plate 15 having the plurality of second convex structures 18 is inclined with respect to the light exit surface 152 to become an inclined bottom surface. Therefore, at a position farther from the light source 13, due to the arrangement of the wedge-shaped light guide plate 15 and the reflection sheet 14, the size and distribution density of the first convex structure 17 and the second convex structure 18 are gradually reduced to ensure the The brightness is uniform.
  • each of the first convex structures 17 on the reflection sheet 14 is aligned with each of the second convex structures 18 on the light guide plate 15, and the two first convex structures 17 and the second convex structures 18 are aligned with each other.
  • the shape and size are also equal.
  • the first convex structure 17 may be formed on the reflection sheet 14 by a screen printing method
  • the second convex structure 18 may be formed on the light guide plate 15 by a thermal compression transfer method.
  • FIG. 8 to FIG. 9 and FIG. 5 is a second embodiment of an edge-type backlight module provided by the present invention.
  • the difference from the first embodiment of the side-type backlight module is that the side-type backlight module includes two light sources 13 respectively disposed at two opposite ends of the light guide plate 15 and becomes a double-side lamp side-type .
  • the light guide plate 15 is a flat-type light guide plate.
  • the first convex structures 17 and the second convex structures 18 may be symmetrically distributed.
  • the size and distribution density of the first convex structure 17 gradually increase.
  • the second convex structure gradually increases The size and distribution density of 18 gradually increase.
  • the present invention also provides a liquid crystal display.
  • the liquid crystal display 1 includes a backlight module 10, a liquid crystal panel 20, a plastic frame 30, and a casing 40.
  • the liquid crystal panel 20 is disposed above the backlight module 10.
  • the plastic frame 30 is disposed between the backlight module 10 and the liquid crystal panel 20, and is used to connect the backlight module 10 and the liquid crystal panel 20.
  • the casing 40 covers an edge area of the liquid crystal panel 20.
  • the backlight module 10 and the plastic frame 30 form a complete liquid crystal display 1.
  • the liquid crystal panel 20 includes an array substrate 21, a counter substrate 23 opposite to the array substrate 21, and a liquid crystal layer 22 interposed between the array substrate 21 and the counter substrate 23.
  • the backlight module 10 is the first embodiment of the above-mentioned side-type backlight module.
  • FIG. 11 is a second embodiment of a liquid crystal display 1 provided by the present invention.
  • the difference from the first embodiment of the liquid crystal display 1 of the present invention is that the backlight module 10 is the second embodiment of the above-mentioned side-type backlight module.
  • the traditional side-type backlight module sets dots on the bottom surface of the light guide plate. After the light enters the light guide plate, the reflection and scattering of the dots on the bottom surface of the light guide plate finally exit from the light guide surface of the light guide plate.
  • the module has a plurality of spheroid-like convex structures on the reflective sheet and the light guide plate.
  • the line light source is changed into a surface light source to reduce the attenuation of light, improve the utilization rate of light and the uniformity of emission.
  • the reflection sheet of the present invention includes a reflection sheet body and a plurality of first convex structures provided on the reflection sheet body, which can reflect light in all directions, thereby improving the light utilization rate.
  • the side-type backlight module of the present invention includes a back plate, a light source provided inside the back plate, a reflection sheet, and a light guide plate, the light source is provided on one side of the light guide plate, and the reflection sheet is provided on the side.
  • a plurality of first convex structures are provided on a surface of the side of the light guide plate facing the light guide plate, and a plurality of surfaces facing away from the reflection plate are provided on a surface of the light guide plate side facing the light guide plate.
  • the second convex structure protruding on one side, the first convex structure and the second convex structure can reflect the light in all directions, so that more light enters the light guide plate and exits from the light exit surface of the light guide plate, thereby improving the utilization rate of light and the uniform emission. Sex.
  • the liquid crystal display of the present invention includes the above-mentioned side-type backlight module.
  • a plurality of first convex structures are provided on a surface of a side of the light guide plate facing the light guide plate, and a plurality of surfaces are provided on a surface of the light guide plate facing the light guide plate.
  • the second convex structure protruding toward the side away from the reflecting sheet, the first convex structure and the second convex structure can reflect light in all directions, so that more light enters the light guide plate and exits from the light exit surface of the light guide plate, thereby improving light utilization. Rate and emission uniformity to improve the panel display effect.

Landscapes

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

Abstract

一种反射片（14）、侧入式背光模组（10）及液晶显示器（1）。侧入式背光模组（10）包括背板（11）、设于背板（11）内侧的光源（13）、反射片（14）以及导光板（15），光源（13）设于导光板（15）的一侧；反射片（14）设于背板（11）与导光板（15）之间，通过在反射片（14）朝向导光板（15）的一侧的表面上设置多个第一凸结构（17），在导光板（15）朝向反射片（14）的一侧的表面上设置多个向远离反射片（14）一侧凸出的第二凸结构（18），第一凸结构（17）和第二凸结构（18）能够反射各个方向的光线，使更多光线进入导光板（15）并从导光板（15）的出光面（152）出射，提高光的利用率和出射均匀性。

Description

反射片、侧入式背光模组及液晶显示器 技术领域
本发明涉及显示技术领域，尤其涉及一种反射片、侧入式背光模组及液晶显示器。
背景技术
液晶显示装置(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。
现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括壳体、设于壳体内的液晶面板及设于壳体内的背光模组(Backlight module)。
背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组两种。直下式背光模组是将发光光源例如阴极荧光灯管或发光二极管设置在液晶面板后方，直接形成面光源提供给液晶面板。而侧入式背光模组是将光源组件LED灯条设于液晶面板侧后方的背板边缘处，LED灯条发出的光线从导光板一侧的入光面进入导光板，经反射和扩散后从导光板出光面射出，再经由光学膜片组，以形成面光源提供给液晶面板。
如图1所示，传统的侧入式背光模组结构包括导光板150、设置在导光板150侧面的LED光源130、灯光反射器170、导光板150上用于反射和散射的网点180、导光板下方的反射片140、导光板150的出光面上方的光学膜片组160等。对于传统的侧入式LED背光模组，光线进入导光板150后经过导光板150底面的网点180的反射和散射最终从导光板150出光面出射，如图2所示。但由于网点180形状和分布是平面性，光线在经过网点180后的反射和散射不够充分，光源利用率偏低，背光出射的均匀度有限。
发明内容
本发明的目的在于提供一种反射片，能够反射各个方向的光线，提高光的利用率。
本发明的目的还在于提供一种侧入式背光模组，背光源出射的光的利用率较高，且导光板出光的均匀性较好。
本发明的另一目的在于提供一种液晶显示器，背光源出射的光的利用 率较高，且导光板出光的均匀性较好。
为实现上述目的，本发明提供一种反射片包括：反射片本体以及设于所述反射片本体上的多个第一凸结构。
所述多个第一凸结构尺寸和分布密度从反射片本体的一侧向另一侧逐渐增大，或者所述多个第一凸结构尺寸和分布密度从反射片本体的两侧向反射片本体的中心逐渐增大。
本发明还提供一种侧入式背光模组，包括：背板以及设于所述背板内侧的光源、反射片及导光板；
所述光源设于与所述导光板的一侧；所述反射片设于所述背板与导光板之间，所述反射片朝向所述导光板的表面上设有多个第一凸结构，所述导光板朝向所述反射片的表面上设有多个向远离反射片一侧凸出的第二凸结构。
所述光源的数量为一个，在所述反射片上，随着远离所述光源，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源，所述第二凸结构的尺寸和分布密度逐渐增大。
所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
所述导光板为楔形导光板，其靠近所述光源一侧的厚度大于远离所述光源一侧的厚度，所述反射片平行于所述导光板具有多个第二凸结构的表面。
所述光源的数量为两个且相对设置于导光板的两端，在所述反射片上，随着远离所述光源至中心，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源至中心，所述第二凸结构的尺寸和分布密度逐渐增大。
所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
所述背板包括底板及数个侧板，所述数个侧板垂直地连接于所述底板的边缘；
所述导光板包括远离背板的底板一侧的出光面、靠近背板的底板一侧的底面及靠近背板的侧板一端的入光面。
本发明还提供一种液晶显示器，包括：背光模组、设于所述背光模组上方的液晶面板、连接于所述背光模组和所述液晶面板之间的胶框，以及覆盖所述液晶面板的边缘区域、背光模组和胶框的外壳；
所述背光模组为上述的侧入式背光模组。
本发明的有益效果：本发明的反射片包括反射片本体以及设于所述反射片本体上的多个第一凸结构，能够反射各个方向的光线，提高了光的利用率。本发明的侧入式背光模组包括背板、设于所述背板内侧的光源、反射片以及导光板，所述光源设于所述导光板的一侧；所述反射片设于所述背板与所述导光板之间，通过在反射片朝向导光板的一侧的表面上设置多个第一凸结构，在导光板朝向反射片的一侧的表面上设置多个向远离反射片一侧凸出的第二凸结构，第一凸结构和第二凸结构能够反射各个方向的光线，使更多光线进入导光板并从导光板的出光面出射，提高光的利用率和出射均匀性。本发明的液晶显示器包括上述侧入式背光模组，通过在反射片朝向导光板的一侧的表面上设置多个第一凸结构，在导光板朝向反射片的一侧的表面上设置多个向远离反射片一侧凸出的第二凸结构，第一凸结构和第二凸结构能够反射各个方向的光线，使更多光线进入导光板并从导光板的出光面出射，提高光的利用率和出射均匀性，改善面板显示效果。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有技术中侧入式背光模组的结构示意图；
图2为现有技术中侧入式背光模组的光线路径示意图；
图3为本发明的反射片的结构示意图；
图4及图5为本发明的反射片的第一凸结构的示意图；
图6为本发明的侧入式背光模组的第一实施例的结构示意图；
图7为本发明的侧入式背光模组的第一实施例中导光板的结构示意图；
图8为本发明的侧入式背光模组的第二实施例的结构示意图；
图9为本发明的侧入式背光模组的第二实施例中导光板的结构示意图；
图10为本发明的液晶显示器的第一实施例的结构示意图；
图11为本发明的液晶显示器的第二实施例的结构示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图3，本发明提供的反射片包括：反射片本体141以及设于所述 反射片本体141上的多个第一凸结构17。
具体地，参阅图4至图5，所述多个第一凸结构17尺寸和分布密度从反射片本体141的一侧向另一侧逐渐增大，或者所述多个第一凸结构17尺寸和分布密度从反射片本体141的两侧向反射片本体141的中心逐渐增大。该多个第一凸结构17能够反射各个方向的光线，提高了光的利用率。
请参阅图6至图7以及图4，为本发明提供的侧入式背光模组的第一实施例，包括：背板11以及设于所述背板11内侧的光源13、反射片14、导光板15及光学膜片组16。
光源13设于导光板15的一侧，从光源13射出的光线进入导光板15，经折射后出射。反射片14设于所述背板11与导光板15之间。光学膜片组16包括依次层叠于导光板15上的下扩散片161、棱镜片162及上扩散片163。
如图6中所示，反射片14朝向导光板15的一侧的表面上设有多个向导光板15一侧凸出的第一凸结构17，导光板15朝向反射片14的一侧的表面上设有多个向远离反射片14一侧凸出的第二凸结构18。第一凸结构17的设置能够反射各个方向的光线，使光线进入导光板15，第二凸结构18的设置能够反射导光板15内部来自各个方向的光线，使更多的光线能够从导光板15出射，减少全反射，从而提高了光的利用率及出射均匀性。
具体地，所述背板11包括底板111及数个侧板112，数个侧板112垂直地连接于底板111的边缘；所述导光板15包括远离背板11的底板111一侧的出光面152、靠近背板11的底板111一侧的底面153及靠近背板11的侧板112一端的入光面151；光源13设置在背板11的一侧板112与导光板15的入光面151之间；反射片14设置在背板11的底板111与导光板15之间。
请参阅图4和图7，第一凸结构17为球体状，具体可以为不完整的球体或不完整的椭球体，优选为半球体或半椭球体，第二凸结构18可以为球体状，具体可以为不完整的球体或不完整的椭球体，优选为半球体或半椭球体，该半球体或半椭球体能够反射各个反向的光线。当然第一凸结构17与第二凸结构18的形状也可以为其他形状，例如方形，本发明在此不做限定。进一步优选地，第一凸结构17和第二凸结构18的变化趋势一致。
具体地，随着远离光源13，第一凸结构17和第二凸结构18的尺寸和分布密度均逐渐增大，而在本实施例中，导光板15为楔形导光板，其靠近光源13一侧的厚度大于远离光源13一侧的厚度，因此，导光板15具有多个第二凸结构18的表面相对于出光面152倾斜而成为一倾斜底面。因此， 在离光源13较远的位置，由于楔形导光板15及反射片14的设置，第一凸结构17和第二凸结构18的尺寸和分布密度又逐渐减小，保证整个液晶面板上的亮度均匀一致。优选地，反射片14上的每一个第一凸结构17与导光板15上的每一个第二凸结构18一一对齐，并且相互对齐的两个第一凸结构17和第二凸结构18的形状、尺寸也相等。
具体地，可通过丝网印刷法在反射片14上形成所述第一凸结构17，通过热压转印法在导光板15上形成第二凸结构18。
请参阅图8至图9以及图5，为本发明提供的侧入式背光模组的第二实施例。在该实施例中，与侧入式背光模组的第一实施例的区别在于侧入式背光模组包括分别设置在导光板15的相对两端的两个光源13，成为双侧灯侧入式。在本实施例中，导光板15为平板型导光板。
由于双侧光源13的设置，第一凸结构17和第二凸结构18可以呈对称地分布。在反射片14上，随着远离两侧光源13至中心，第一凸结构17的尺寸和分布密度逐渐增大，在导光板15上，随着远离两侧光源13至中心，第二凸结构18的尺寸和分布密度逐渐增大。其他结构和技术效果与第一实施例相同，不再赘述。
在上述的侧入式背光模组的基础上，本发明还提供一种液晶显示器。
请参阅图10并结合参阅图3至7，为本发明的液晶显示器的第一实施例。液晶显示器1包括背光模组10、液晶面板20、胶框30和外壳40。液晶面板20设置在背光模组10的上方，胶框30设置于背光模组10和液晶面板20之间，用于连接背光模组10和液晶面板20，外壳40覆盖于液晶面板20的边缘区域、背光模组10和胶框30，从而形成一个完整的液晶显示器1。液晶面板20包括阵列基板21、与阵列基板21相对的对置基板23以及夹设于阵列基板21和对置基板23之间的液晶层22。背光模组10为上述侧入式背光模组的第一实施例。
请参阅图11并结合参阅图5、图8至9，为本发明提供的液晶显示器1的第二实施例。在该实施例中，与本发明的液晶显示器1的第一实施例区别在于，背光模组10为上述侧入式背光模组的第二实施例。
值得一提的是，传统的侧入式背光模组在导光板底面设置网点，光线进入导光板后经过导光板底面的网点的反射和散射最终从导光板出光面出射，但由于网点形状和分布是平面性，光线在经过网点后的反射和散射不够充分，入射角小于全反射角的部分光线无法被利用，光源利用率偏低，背光出射的均匀度有限，而本发明的侧入式背光模组通过在反射片和导光板上设置多个类球体状的凸起结构，由于类球体反射的光的角度较多，使 得入射角小于全反射角的部分光能从导光板上表面射出，将线光源变为面光源，减少光的衰减，提高光的利用率和出射均匀性。
综上所述，本发明的反射片包括反射片本体以及设于所述反射片本体上的多个第一凸结构，能够反射各个方向的光线，提高了光的利用率。本发明的侧入式背光模组包括背板、设于所述背板内侧的光源、反射片以及导光板，所述光源设于所述导光板的一侧；所述反射片设于所述背板与所述导光板之间，通过在反射片朝向导光板的一侧的表面上设置多个第一凸结构，在导光板朝向反射片的一侧的表面上设置多个向远离反射片一侧凸出的第二凸结构，第一凸结构和第二凸结构能够反射各个方向的光线，使更多光线进入导光板并从导光板的出光面出射，提高光的利用率和出射均匀性。本发明的液晶显示器包括上述侧入式背光模组，通过在反射片朝向导光板的一侧的表面上设置多个第一凸结构，在导光板朝向反射片的一侧的表面上设置多个向远离反射片一侧凸出的第二凸结构，第一凸结构和第二凸结构能够反射各个方向的光线，使更多光线进入导光板并从导光板的出光面出射，提高光的利用率和出射均匀性，改善面板显示效果。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (16)

  1. 一种反射片，包括：反射片本体以及设于所述反射片本体上的多个第一凸结构。
  2. 如权利要求1所述的反射片，其中，所述多个第一凸结构尺寸和分布密度从反射片本体的一侧向另一侧逐渐增大，或者所述多个第一凸结构尺寸和分布密度从反射片本体的两侧向反射片本体的中心逐渐增大。
  3. 一种侧入式背光模组，包括：背板以及设于所述背板内侧的光源、反射片及导光板；
    所述光源设于所述导光板的一侧；所述反射片设于所述背板与所述导光板之间，所述反射片朝向所述导光板的表面上设有多个第一凸结构，所述导光板朝向所述反射片的表面上设有多个向远离反射片一侧凸出的第二凸结构。
  4. 如权利要求3所述的侧入式背光模组，其中，所述光源的数量为一个，在所述反射片上，随着远离所述光源，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源，所述第二凸结构的尺寸和分布密度逐渐增大。
  5. 如权利要求4所述的侧入式背光模组，其中，所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
  6. 如权利要求4所述的侧入式背光模组，其中，所述导光板为楔形导光板，其靠近所述光源一侧的厚度大于远离所述光源一侧的厚度，所述反射片平行于所述导光板具有多个第二凸结构的表面。
  7. 如权利要求3所述的侧入式背光模组，其中，所述光源的数量为两个且相对设置于导光板的两端，在所述反射片上，随着远离所述光源至中心，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源至中心，所述第二凸结构的尺寸和分布密度逐渐增大。
  8. 如权利要求7所述的侧入式背光模组，其中，所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
  9. 如权利要求3所述的侧入式背光模组，其中，所述背板包括底板及数个侧板，所述数个侧板垂直地连接于所述底板的边缘；
    所述导光板包括远离背板的底板一侧的出光面、靠近背板的底板一侧 的底面及靠近背板的侧板一端的入光面。
  10. 一种液晶显示器，包括：背光模组、设于所述背光模组上方的液晶面板、连接于所述背光模组和所述液晶面板之间的胶框以及覆盖所述液晶面板的边缘区域、背光模组和胶框的外壳；
    所述背光模组为如权利要求3所述的侧入式背光模组。
  11. 如权利要求10所述的液晶显示器，其中，所述光源的数量为一个，在所述反射片上，随着远离所述光源，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源，所述第二凸结构的尺寸和分布密度逐渐增大。
  12. 如权利要求11所述的液晶显示器，其中，所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
  13. 如权利要求11所述的液晶显示器，其中，所述导光板为楔形导光板，其靠近所述光源一侧的厚度大于远离所述光源一侧的厚度，所述反射片平行于所述导光板具有多个第二凸结构的表面。
  14. 如权利要求10所述的液晶显示器，其中，所述光源的数量为两个且相对设置于导光板的两端，在所述反射片上，随着远离所述光源至中心，所述第一凸结构的尺寸和分布密度逐渐增大；在所述导光板上，随着远离所述光源至中心，所述第二凸结构的尺寸和分布密度逐渐增大。
  15. 如权利要求14所述的液晶显示器，其中，所述反射片上的每一第一凸结构与所述导光板上的每一第二凸结构一一对齐，且相互对齐的第一凸结构和第二凸结构的尺寸相同。
  16. 如权利要求10所述的液晶显示器，其中，所述背板包括底板及数个侧板，所述数个侧板垂直地连接于所述底板的边缘；
    所述导光板包括远离背板的底板一侧的出光面、靠近背板的底板一侧的底面及靠近背板的侧板一端的入光面。
PCT/CN2018/107778 2018-06-25 2018-09-26 反射片、侧入式背光模组及液晶显示器 Ceased WO2020000729A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/319,314 US20210116629A1 (en) 2018-06-25 2018-09-26 Reflection sheet, edge-lit backlight module, and lcd device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810661983.1 2018-06-25
CN201810661983.1A CN108873129A (zh) 2018-06-25 2018-06-25 反射片、侧入式背光模组及液晶显示器

Publications (1)

Publication Number Publication Date
WO2020000729A1 true WO2020000729A1 (zh) 2020-01-02

Family

ID=64294667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/107778 Ceased WO2020000729A1 (zh) 2018-06-25 2018-09-26 反射片、侧入式背光模组及液晶显示器

Country Status (3)

Country Link
US (1) US20210116629A1 (zh)
CN (1) CN108873129A (zh)
WO (1) WO2020000729A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109613751B (zh) * 2018-12-13 2021-10-15 厦门天马微电子有限公司 背光模组及显示装置
CN109407403B (zh) * 2018-12-19 2021-07-16 厦门天马微电子有限公司 背光模组及显示装置
CN109557697B (zh) * 2018-12-25 2021-06-15 维沃移动通信有限公司 一种显示调节方法及终端
KR102769104B1 (ko) 2019-10-08 2025-02-18 엘지이노텍 주식회사 촬상 렌즈
KR102513442B1 (ko) * 2020-11-06 2023-03-24 주식회사 엘엠에스 광학 필름 및 이를 포함하는 백라이트 유닛
CN112162436B (zh) * 2020-11-13 2022-04-08 福州大学 一种量子点背光模组结构
CN112162435B (zh) * 2020-11-13 2022-04-08 福州大学 一种侧入式量子点背光模组结构
CN114078398B (zh) * 2021-11-22 2024-07-02 深圳创维－Rgb电子有限公司 拼接屏和显示装置
CN115980909B (zh) * 2023-03-22 2023-07-18 惠科股份有限公司 发光组件及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296604A (zh) * 1999-03-02 2001-05-23 松下电器产业株式会社 照明装置和具有该照明装置的显示装置
CN1512198A (zh) * 2002-12-27 2004-07-14 鸿富锦精密工业（深圳）有限公司 反射板及面光源装置
CN1580890A (zh) * 2003-08-03 2005-02-16 鸿富锦精密工业（深圳）有限公司 背光模组
US6979113B2 (en) * 2002-12-27 2005-12-27 Advanced Display Inc. Surface light source device
CN1932604A (zh) * 2005-09-16 2007-03-21 群康科技(深圳)有限公司 导光板及使用该导光板的背光模组
CN105953092A (zh) * 2016-06-24 2016-09-21 深圳宝耀科技有限公司 一种均匀发光的低眩光led平板灯

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296604A (zh) * 1999-03-02 2001-05-23 松下电器产业株式会社 照明装置和具有该照明装置的显示装置
CN1512198A (zh) * 2002-12-27 2004-07-14 鸿富锦精密工业（深圳）有限公司 反射板及面光源装置
US6979113B2 (en) * 2002-12-27 2005-12-27 Advanced Display Inc. Surface light source device
CN1580890A (zh) * 2003-08-03 2005-02-16 鸿富锦精密工业（深圳）有限公司 背光模组
CN1932604A (zh) * 2005-09-16 2007-03-21 群康科技(深圳)有限公司 导光板及使用该导光板的背光模组
CN105953092A (zh) * 2016-06-24 2016-09-21 深圳宝耀科技有限公司 一种均匀发光的低眩光led平板灯

Also Published As

Publication number Publication date
CN108873129A (zh) 2018-11-23
US20210116629A1 (en) 2021-04-22

Similar Documents

Publication Publication Date Title
WO2020000729A1 (zh) 反射片、侧入式背光模组及液晶显示器
TWI328702B (en) Backlight system
CN106597599A (zh) 背光模组、显示面板及显示装置
CN101571264B (zh) Led背光模组
CN101206280A (zh) 导光板及使用该导光板的背光模组
CN102003658A (zh) 光学片及其制造方法和具有其的背光单元和液晶显示设备
CN104614855A (zh) 一种光路调节单元和显示装置
CN101377586A (zh) 背光模组及具有该背光模组的液晶显示装置
CN101514789B (zh) 背光单元
WO2017024752A1 (zh) 背光模组和显示装置
CN101922689B (zh) 减少漏光的背光模块
CN101349834A (zh) 一种具有微光学结构背光系统及导光板
CN206339809U (zh) 一种背光模组及液晶显示装置
CN105242457A (zh) 一种高色彩饱和度的导光装置
US20170139116A1 (en) Light guide plate, backlight module and display device
WO2021190414A1 (zh) 一种显示装置
CN101004253B (zh) 光导板和采用该光导板的显示装置
CN109976036A (zh) 一种光学膜片、背光模组及显示装置
WO2013174032A1 (zh) 背光模组及液晶显示装置
CN107608137A (zh) 一种光源、背光模组和显示装置
CN201297576Y (zh) 嵌入式导光装置
WO2015062259A1 (zh) 导光元件、背光源及显示装置
CN109976039A (zh) 光源组件、背光模组和显示装置
CN205080339U (zh) 一种蓝光ld背光模组及显示装置
CN100592168C (zh) 具有放射状沟槽的光学基板以及应用其的背光模块

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18924743

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18924743

Country of ref document: EP

Kind code of ref document: A1