WO2016106889A1 - 一种导光板及显示模组 - Google Patents

一种导光板及显示模组 Download PDF

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Publication number
WO2016106889A1
WO2016106889A1 PCT/CN2015/071135 CN2015071135W WO2016106889A1 WO 2016106889 A1 WO2016106889 A1 WO 2016106889A1 CN 2015071135 W CN2015071135 W CN 2015071135W WO 2016106889 A1 WO2016106889 A1 WO 2016106889A1
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WIPO (PCT)
Prior art keywords
light
scattering
display module
guide plate
light guide
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Ceased
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PCT/CN2015/071135
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English (en)
French (fr)
Inventor
张彦学
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/428,362 priority Critical patent/US20160341880A1/en
Publication of WO2016106889A1 publication Critical patent/WO2016106889A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—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
    • 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • 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

Definitions

  • the present invention relates to the field of backlight display technologies, and in particular, to a light guide plate and a display module.
  • the existing light guide plate is generally designed as a rectangular plate-like structure, and at the bottom of the light guide plate, a dot which is favorable for astigmatism is designed to realize reflection of light.
  • a dot which is favorable for astigmatism is designed to realize reflection of light.
  • the effect of this method on improving the uniformity of light guiding is not significant, and it is difficult to achieve a great breakthrough.
  • the present invention provides a light guide plate and a display module with good backlight uniformity.
  • a light guide plate includes a light incident surface on both sides, a light exit surface on the upper surface, and a scattering surface on the lower surface of the scattering mesh point, the scattering surface being recessed toward the light exit surface.
  • the scattering surface is composed of a sloped surface inclined from the lower end of the light incident surface of the both sides toward the light emitting surface.
  • the scattering surface is a curved surface.
  • the scattering surface is coated with a reflective material.
  • the present invention also provides a display module including a display panel and a backlight unit.
  • the backlight unit includes the above-mentioned light guide plate and LED components disposed on both sides of the light guide plate.
  • the backlight unit includes a reflective layer and a back plate which are sequentially disposed under the scattering surface.
  • the reflective layer is a reflective material coated by the scattering surface.
  • the reflective layer is a reflective sheet that is in close contact with the scattering surface.
  • the middle portion of the back plate is convex and closely adheres to the lower surface of the reflective layer.
  • the light guide plate of the invention uses the double-side light-injecting structure, and the scattering surface of the bottom portion is recessed toward the light-emitting surface direction, which improves the uniformity of the backlight of the light guide plate, and is beneficial to improving the backlight effect.
  • FIG. 1 is a schematic structural view of a light guide plate according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of another light guide plate according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of a display module according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of a display module according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a display module according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic structural diagram of a display module according to Embodiment 4 of the present invention.
  • the light guide plate 10 of the present embodiment includes a light incident surface 10a on both sides, a light exit surface 10b on the upper surface, and a scattering surface 10c on the lower surface where scattering dots are provided.
  • the scattering surface 10c is recessed toward the light exit surface 10b. .
  • the scattering surface 10c is recessed in the direction of the light-emitting surface 10b, the light incident on the light-incident surface 10a on both sides can enter the scattering surface 10c through a short optical path, and then diverge toward the periphery through the scattering surface 10c, and finally emit the light-emitting surface.
  • the light of 10b is more uniform.
  • the scattering surface 10c is a curved surface (as shown in FIG. 1).
  • the scattering surface 10c is composed of a slope S which is inclined from the lower end of the light-incident surface 10a of the both sides toward the light-emitting surface 10b (as shown in Fig. 2).
  • the two inclined surfaces S intersect at the center of the scattering surface 10c.
  • the embodiment of the present invention adopts a light-input mode in which light is incident on both sides of a light guide plate.
  • the display module includes a display panel 20 and a backlight unit 100.
  • the backlight unit 100 includes a light guide plate 10 and is disposed on the light guide plate 10.
  • the LED assembly 60 on both sides, and the reflective layer 40 and the metal back plate 50, which are sequentially disposed under the scattering surface 10c.
  • the reflective layer 40 is in close contact with the upper surface of the backing plate 50 for reflecting light that is transmitted through the light guide plate 10 to the reflective layer 40 to improve light utilization.
  • the backlight unit 100 may further include a plastic frame 70 for protecting the LED assembly 60 and the light guide plate 10, and the display panel 20 is pasted on the upper surface of the backlight unit 100 through the adhesive layer 90.
  • the difference from Embodiment 1 is that the scattering surface 10c of the present embodiment is coated with a reflective material, and the reflective material layer 10s is a reflective layer 40 of the backlight unit 100 for reflecting LEDs from both sides.
  • the component 60 is incident on the light of the scattering surface 10c.
  • the reflective layer 40 of the present embodiment is a separate reflection sheet, and the reflection sheet is in close contact with the scattering surface 10c.
  • the middle portion of the back plate 50 of the present embodiment is convexly disposed and adheres to the lower surface of the reflective layer 40, and can be used to support the concave scattering surface 10c.
  • the display module has a more compact structure and higher strength.

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

Abstract

一种导光板(10)，包括两侧的入光面(10a)、上表面的出光面(10b)和下表面设有散射网点的散射面(10c)，所述散射面(10c)朝所述出光面(10b)方向凹陷。还提供了一种显示模组，包括显示面板(20)及背光单元(100)，所述背光单元(100)包括上述的导光板(10)及设于所述导光板(10)两侧的LED组件(60)。通过使用双侧入光结构，同时底部的散射面(10c)朝出光面(10b)方向凹陷，很好地提高了导光板(10)背光均匀性，有利于提高背光效果。

Description

一种导光板及显示模组 技术领域
本发明涉及背光显示技术领域，尤其涉及一种导光板及显示模组。
背景技术
随着消费电子产品技术的发展，显示设备的背光均匀性的提升对于提高产品竞争力具有重要意义。现有的导光板通常被设计为矩形的板状结构，同时在导光板底部设计有利于散光的网点，以实现光线的反射。但此种方式对于提升导光均匀性的效果并不显著，难以实现很大的突破。
发明内容
鉴于现有技术存在的不足，本发明提供了一种背光均匀性好的导光板及显示模组。
为了实现上述的目的，本发明采用了如下的技术方案：
一种导光板，包括两侧的入光面、上表面的出光面和下表面设有散射网点的散射面，所述散射面朝所述出光面方向凹陷。
其中，所述散射面由自两侧的所述入光面下端朝所述出光面倾斜的斜面组成。
其中，两个所述斜面相交于所述散射面的中部。
或者，所述散射面为弧面。
其中，所述散射面涂覆有反射材料。
同时，本发明还提供了一种显示模组，包括显示面板及背光单元，所述背光单元包括上述的导光板及设于所述导光板两侧的LED组件。
其中，所述背光单元包括依次设于所述散射面下的反射层和背板。
或者，所述反射层为所述散射面涂覆的反射材料。
其中，所述反射层为反射片，紧贴所述散射面。
其中，所述背板中部凸起并紧贴所述反射层下表面。
本发明的导光板使用双侧入光结构，同时底部的散射面朝出光面方向凹陷，很好地提高了导光板背光均匀性，有利于提高背光效果。
附图说明
图1为本发明实施例1的导光板结构示意图。
图2为本发明实施例1的另一种导光板结构示意图。
图3为本发明实施例1的显示模组结构示意图。
图4为本发明实施例2的显示模组结构示意图。
图5为本发明实施例3的显示模组结构示意图。
图6为本发明实施例4的显示模组结构示意图。
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。
实施例1
参阅图1～2，本实施例的导光板10包括两侧的入光面10a、上表面的出光面10b和下表面设有散射网点的散射面10c，散射面10c朝出光面10b的方向凹陷。
由于散射面10c朝出光面10b的方向凹陷，两侧的入光面10a射入的光线经过很短的光路即可射入到散射面10c，然后经过散射面10c朝四周发散，最终射出出光面10b的光线更加均匀。
具体地，散射面10c为弧面(如图1所示)。或者，散射面10c由自两侧的入光面10a下端朝出光面10b倾斜的斜面S组成(如图2所示)，本实施例优选两个斜面S相交于散射面10c的中部。
如图3所示，本发明实施例采取导光板双侧入光的入光方式，显示模组包括显示面板20及背光单元100，背光单元100包括导光板10、设于导光板10 两侧的LED组件60，以及依次设于散射面10c下的反射层40和金属的背板50。反射层40紧贴于背板50的上表面，用于反射穿透导光板10照射至反射层40的光线，提高光线利用率。
进一步地，背光单元100还可以包括用于保护LED组件60和导光板10的胶框70，显示面板20通过粘贴层90粘贴于背光单元100上表面。
实施例2
如图4所示，与实施例1不同的是，本实施例的散射面10c涂覆有反射材料，该反射材料层10s即为背光单元100的反射层40，用以反射从两侧的LED组件60射入到散射面10c的光线。
实施例3
如图5所示，与实施例1不同的是，本实施例的反射层40为单独设置的一层反射片，该反射片紧贴于散射面10c。
实施例4
如图6所示，在实施例1～3的基础上，本实施例的背板50中部凸起并紧贴反射层40下表面，可以用于对凹陷的散射面10c起到支撑的作用，相比上述实施例，显示模组的结构更紧凑，强度更高。
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. 一种导光板，其特征在于，包括两侧的入光面(10a)、上表面的出光面(10b)和下表面设有散射网点的散射面(10c)，所述散射面(10c)朝所述出光面(10b)方向凹陷。
  2. 根据权利要求1所述的导光板，其特征在于，所述散射面(10c)由自两侧的所述入光面(10a)下端朝所述出光面(10b)倾斜的斜面(S)组成。
  3. 根据权利要求2所述的导光板，其特征在于，两个所述斜面(S)相交于所述散射面(10c)的中部。
  4. 根据权利要求1所述的导光板，其特征在于，所述散射面(10c)为弧面。
  5. 根据权利要求1所述的导光板，其特征在于，所述散射面(10c)涂覆有反射材料。
  6. 根据权利要求2所述的导光板，其特征在于，所述散射面(10c)涂覆有反射材料。
  7. 根据权利要求4所述的导光板，其特征在于，所述散射面(10c)涂覆有反射材料。
  8. 一种显示模组，其特征在于，包括显示面板(20)及背光单元(100)，所述背光单元(100)包括导光板(10)及设于所述导光板(10)两侧的LED组件(60)，所述导光板(10)包括两侧的入光面(10a)、上表面的出光面(10b)和下表面设有散射网点的散射面(10c)，所述散射面(10c)朝所述出光面(10b)方向凹陷。
  9. 根据权利要求8所述的显示模组，其特征在于，所述背光单元(100)包括依次设于所述散射面(10c)下的反射层(40)和背板(50)。
  10. 根据权利要求9所述的显示模组，其特征在于，所述背板(50)中部凸起并紧贴所述反射层(40)下表面。
  11. 根据权利要求8所述的显示模组，其特征在于，所述反射层(40)为所述散射面(10c)涂覆的反射材料。
  12. 根据权利要求11所述的显示模组，其特征在于，所述背板(50)中部 凸起并紧贴所述反射层(40)下表面。
  13. 根据权利要求9所述的显示模组，其特征在于，所述反射层(40)为反射片，紧贴所述散射面(10c)。
  14. 根据权利要求13所述的显示模组，其特征在于，所述背板(50)中部凸起并紧贴所述反射层(40)下表面。
  15. 根据权利要求8所述的显示模组，其特征在于，所述散射面(10c)由自两侧的所述入光面(10a)下端朝所述出光面(10b)倾斜的斜面(S)组成。
  16. 根据权利要求8所述的显示模组，其特征在于，所述散射面(10c)为弧面。
  17. 根据权利要求16所述的显示模组，其特征在于，所述背光单元(100)包括依次设于所述散射面(10c)下的反射层(40)和背板(50)。
  18. 根据权利要求17所述的显示模组，其特征在于，所述反射层(40)为所述散射面(10c)涂覆的反射材料。
  19. 根据权利要求18所述的显示模组，其特征在于，所述反射层(40)为反射片，紧贴所述散射面(10c)。
  20. 根据权利要求19所述的显示模组，其特征在于，所述背板(50)中部凸起并紧贴所述反射层(40)下表面。
PCT/CN2015/071135 2014-12-31 2015-01-20 一种导光板及显示模组 Ceased WO2016106889A1 (zh)

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US14/428,362 US20160341880A1 (en) 2014-12-31 2015-01-20 Light guiding plate and display module

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