WO2021134514A1 - 背光模组、扩散板制造方法及显示装置 - Google Patents

背光模组、扩散板制造方法及显示装置 Download PDF

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Publication number
WO2021134514A1
WO2021134514A1 PCT/CN2019/130631 CN2019130631W WO2021134514A1 WO 2021134514 A1 WO2021134514 A1 WO 2021134514A1 CN 2019130631 W CN2019130631 W CN 2019130631W WO 2021134514 A1 WO2021134514 A1 WO 2021134514A1
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Prior art keywords
light
backlight
backlight module
diffuser plate
emitting unit
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PCT/CN2019/130631
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English (en)
French (fr)
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李泽龙
王代青
强科文
季洪雷
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深圳Tcl新技术有限公司
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Priority to PCT/CN2019/130631 priority Critical patent/WO2021134514A1/zh
Publication of WO2021134514A1 publication Critical patent/WO2021134514A1/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

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a backlight module, a method for manufacturing a diffuser plate thereof, and a display device.
  • the backlight modes of liquid crystal display devices are mainly divided into two types: side-type and direct-type backlights.
  • Traditional side-type backlights use light guide plates for secondary optical distribution, which are used by many ultra-thin products, but the price of light guide plates is higher. , Resulting in higher cost of the traditional edge-type backlight.
  • the traditional direct backlight uses a diffuser plate to play the role of structural support and optical diffusion, and the lens on the LED increases the angle of the LED light, and uses air to mix the light, so that the cost of the direct backlight is lower, while the direct backlight There are shadows in the four corners, which causes the optical quality to be inferior to the edge backlight. Therefore, whether the backlight module in the prior art is in an edge-type backlight mode or a direct-type backlight mode, either has the problem of high light guide cost or poor light guide effect, which cannot effectively achieve balance.
  • the present disclosure proposes a new type of backlight module, which adopts a special-shaped inverse prism diffuser to reduce the large-angle light exit angle of the light-emitting unit. It is small, increasing the incident light of the front viewing angle, improving the brightness of the front viewing angle backlight, and achieving the role of replacing the brightness enhancement film.
  • a backlight module includes a light-emitting unit, a backlight cavity, a diffuser plate and an optical film; the backlight cavity, the diffuser plate and the optical film are stacked in sequence; wherein the light-emitting unit is arranged On the side surface of the backlight cavity, the diffuser plate is provided with a convex prism structure on the surface facing the backlight cavity, the light emitted by the light emitting unit is incident on the backlight cavity and then refracted into the diffuser plate.
  • the diffuser plate The prism structure on the surface converts the large-angle light incident from the backlight cavity into a small-angle light and exits to the optical film.
  • the convex prism structure is a zigzag prism, which is provided with a hypotenuse facing the light-emitting unit side and a hypotenuse facing the light-emitting unit side.
  • the cross section of the convex prism structure provided on the surface of the diffuser plate facing the backlight cavity is triangular.
  • the cross section of the convex prism structure provided on the surface of the diffuser plate facing the backlight cavity is an isosceles right triangle.
  • the angle range of the internal angle ⁇ 1 near the light-emitting unit is 45° to 90°
  • the angle range of the inner angle ⁇ 1 near the light-emitting unit The angle range of the inner angle ⁇ 2 is 10° to 45°
  • the angle range of the inner angle ⁇ 3 of the convex prism end is 45° to 125°.
  • the height of the convex prism structure in the convex prism structure arranged on the surface of the diffuser plate facing the backlight cavity is 10 to 200 microns.
  • one side of the backlight cavity facing the diffuser is a horizontal plane, and the other side is a curved surface.
  • the backlight cavity is an air backlight cavity.
  • the optical film in the above solution is a diffusion film, a brightness enhancement film, a Micro Lens and/or a DBEF film.
  • the light emitting unit includes a PCB board, an LED light source and a collimating lens, and the LED light source is arranged on the PCB board.
  • the light-emitting unit utilizes a collimating lens to collimate and adjust the light emitted by the LED light source.
  • the light-emitting unit includes a PCB board, an LED light source and a reflective cup with a silver-plated surface, and the LED light source is arranged on the PCB board.
  • the light-emitting unit utilizes a silver-plated reflector cup to collimate and adjust the light emitted by the LED light source.
  • the present disclosure also provides a method for manufacturing the aforementioned diffuser plate, which includes the following steps:
  • a pre-engraved roller structure is used to directly emboss a diffuser plate with a convex prism structure on the surface of an uncured diffuser plate substrate.
  • the present disclosure also provides another method for manufacturing the aforementioned diffuser plate, which includes the following steps:
  • the UV photoresist is cured to form a diffuser plate with a convex prism structure on the surface.
  • the present disclosure also provides a display device, wherein the display device includes a display panel and the aforementioned backlight module.
  • the backlight module of the present disclosure adopts a structure with a convex prism arranged on the light incident surface of the diffuser plate, and the light-emitting unit adopts a collimating lens or a silver-plated reflector to make the LED light source emit
  • the air backlight cavity is used to reflect the collimated light from the LED light source into the air backlight cavity to the light incident surface.
  • a diffuser with a convex prism structure is provided to convert the large-angle light into a small-angle light.
  • the optical film the light-gathering effect on the emitted light is realized, and the purpose of backlight enhancement is achieved. Even the brightness enhancement film required by the optical film can be removed, thereby further reducing the cost.
  • FIG. 1 is a schematic diagram of the structural principle of a preferred embodiment of a backlight module of the present disclosure.
  • FIG. 2 is a schematic diagram of the structure principle of a diffuser plate in a preferred embodiment of a backlight module of the present disclosure.
  • Figure 3-1 is a schematic diagram of a structural principle of a light-emitting unit in a preferred embodiment of a backlight module of the present disclosure.
  • 3-2 is a schematic diagram of another structural principle of a light-emitting unit in a preferred embodiment of a backlight module of the present disclosure.
  • the present disclosure provides a backlight module.
  • the backlight module adopts a diffuser plate with a special inverse prism structure and cooperates with a side-entry air backlight module to give full play to the advantages of low cost and good optical uniformity of the air backlight module.
  • This special diffuser with inverse prism structure has a light-gathering function as well as an ordinary diffuser, reducing the angle of the large-angle light, and all the light enters the backlight module, increasing the brightness of the front view angle. As shown in the structural schematic diagram of the preferred embodiment of the backlight module in FIG.
  • the backlight module of the present disclosure includes a light-emitting unit 11, a backlight cavity 12, a diffuser plate 14 and an optical film 15; the backlight cavity 12, the diffuser plate 14 and The optical films 15 are stacked in order; specifically, as shown in FIG. 1, the light-emitting unit 11 is arranged on the side of the backlight cavity 12, the backlight cavity 12 is an air backlight cavity, and the air backlight cavity is The light incident from the light-emitting unit provides a certain light mixing space and light mixing distance.
  • the back of the backlight cavity 12 is provided with an arc-shaped reflective sheet 13, and the arc of the arc-shaped reflective sheet is determined by the thickness and length of the backlight cavity 12 Obtained by optical simulation.
  • the surface of the diffuser plate 14 facing the backlight cavity 12 is provided with a convex prism structure.
  • the convex prism structure is preferably a zigzag prism with a hypotenuse facing the light-emitting unit 11 side and a side facing away from the light-emitting unit 11 Obliquely, the light emitted by the light-emitting unit 11 is incident on the backlight cavity 12 and then refracted into the diffuser plate 14.
  • FIG. 1 only shows a part of the light refraction route of the light-emitting unit 11 incident on the backlight cavity 12. Part of the light refraction route shows the principle of condensing large-angle light when the convex prism structure is applied to this kind of backlight.
  • the optical film 15 includes, but is not limited to, a diffusion film, a brightness enhancement film, a single or a combination of multiple films such as MicroLENS, DBEF, or a composite film made of these films.
  • the prism structure on the surface of the diffuser plate 14 converts the large-angle light incident from the backlight cavity into a small-angle light and exits to the optical film 15.
  • the diffuser plate 14 has a diffuser main body 21 and a convex prism structure 22 disposed toward the surface of the backlight cavity.
  • the cross section of the convex prism structure 22 disposed toward the surface of the backlight cavity It is a triangular shape.
  • the height H of each prism is preferably the same, and H is preferably 10-200um. between. ⁇ 1, ⁇ 2, and ⁇ 3 are the three internal angles of the convex prism structure respectively.
  • the preferred angles are: 45° ⁇ 1 ⁇ 90°, 10° ⁇ 2 ⁇ 45°, 45° ⁇ 3 ⁇ 125°, that is, the internal angle ⁇ 1 of the near-light emitting unit
  • the angle range of is 45° to 90°
  • the angle range of the inner angle ⁇ 2 away from the light-emitting unit is 10° to 45°
  • the angle range of the inner angle ⁇ 3 of the convex prism end is 45° to 125°.
  • the cross section of the convex prism structure disposed on the surface of the diffuser plate facing the backlight cavity is an isosceles right triangle, that is, the angle between the internal angle ⁇ 1 and the internal angle ⁇ 2 is 45°, the angle of the internal angle ⁇ 3 is 90°.
  • Figures 3-1 and 3-2 are schematic diagrams of the structural principle of the light-emitting unit in a preferred embodiment of the backlight module of the present disclosure.
  • Figures 3-1 and 3-2 illustrate two light-emitting forms, and other light-emitting forms emit light in these two types.
  • Reasonable changes in the form should also be included in the scope of the present disclosure.
  • the final effect of the light-emitting unit is collimation, even if the angle ⁇ between the emitted light and the horizontal normal is as small as possible, in the preferred embodiment of the present disclosure
  • the exit angle of more than 80% of the light is within 10°.
  • Figure 3-1 is the use of a lens to collimate the light emitted by the LED
  • Figure 3-2 is the use of a special-shaped reflector cup to collimate the light emitted by the LED.
  • the light-emitting unit shown in Figure 3-1 includes a PCB board 31, a light-emitting source LED32, and a special-shaped collimating lens 33.
  • the light-emitting source LED32 arranged on the PCB board 31 emits light and then passes through the special-shaped collimating lens 33 to emit light.
  • the special-shaped collimating lens 33 is a prior art, and its structure is not limited here.
  • Figure 3-2 shows another light-emitting unit structure, including a PCB board 31, a light-emitting source LED32, and a reflective cup 34 with a silver-plated surface. Similarly, the light emitted by the light-emitting source LED32 arranged on the PCB board 31 passes through the reflective cup. The reflection of 34 emits collimated light.
  • the diffuser plate in the backlight module of the present disclosure includes a diffuser plate main body 21 and a convex prism structure 22.
  • the diffuser plate of the convex prism structure can include two manufacturing forms.
  • the present disclosure also provides two methods for manufacturing the above-mentioned diffuser plate.
  • a pre-engraved roller structure is used to directly emboss a diffuser plate with a convex prism structure on the surface of an uncured diffuser plate substrate.
  • the UV photoresist is cured to form a diffuser plate with a convex prism structure on the surface.
  • the present disclosure also provides a display device, which includes a display panel and the above-mentioned backlight module.

Abstract

一种背光模组，背光模组包括发光单元（11）、背光腔体（12）、扩散板（13）和光学膜片（15）；背光腔体（12）、扩散板（13）和光学膜片（15）依序层叠设置；发光单元（11）设置于背光腔体（12）的侧面，扩散板（13）朝向背光腔体（12）的表面设置有凸起棱镜结构，发光单元（11）出射的光入射到背光腔体（12）后折射入扩散板（13），扩散板（13）表面的棱镜结构将背光腔体（12）入射的大角度光线转变为小角度光线出射到光学膜片（15），实现对出射光线的聚光作用，达到背光增亮的目的。

Description

背光模组、扩散板制造方法及显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组、其扩散板制造方法及显示装置。
背景技术
目前，液晶显示装置的背光方式主要分为侧入式和直下式两种背光，传统侧入式背光利用导光板进行二次光学分布，为较多超薄产品所采用，但导光板价格较高，致使传统侧入式背光的成本较高。传统直下式背光采用扩散板起到结构支撑和光学扩散的作用，加上LED上的透镜加大LED出光角度，并利用空气进行混光，从而使得直下式背光的成本较低，而直下式背光存在四角暗影，导致光学品质不如侧入式背光。因此，现有技术背光模组无论是侧入式背光模式还是直下式背光模式要么存在导光成本高，要么存在导光效果较差的问题，无法有效达到均衡。
因此，现有技术还有待于改进和发展。
发明内容
鉴于上述现有技术的不足之处，本公开为解决现有技术缺陷和不足，提出了一种新型背光模组，采用特殊形状的逆棱镜扩散板，将发光单元的大角度出射光出射角度减小，增加了正视角的入光，提高了正视角背光的亮度，并达到取代增亮片的作用。
本公开解决技术问题所采用的技术方案如下：
一种背光模组，所述背光模组包括发光单元、背光腔体、扩散板和光学膜片；所述背光腔体、扩散板和光学膜片依序层叠设置；其中，所述发光单元设置于所述背光腔体的侧面，所述扩散板朝向背光腔体的表面设置有凸起棱镜结构，所述发光单元出射的光入射到所述背光腔体后折射入扩散板，所述扩散板表面的棱镜结构将背光腔体入射的大角度光线转变为小角度光线出射到所述光学膜片。
作为一种改进的技术方案，所述凸起棱镜结构为锯齿状的棱镜，其设置有朝 向所述发光单元侧的斜边和背向所述发光单元侧的斜边。
作为一种改进的技术方案，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面为三角形。
作为一种改进的技术方案，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面为等腰直角三角形。
作为一种改进的技术方案，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面三角形内角中，近发光单元的内角α1的角度范围为45°至90°，远离发光单元的内角α2的角度范围为10°至45°，凸起棱镜端的内角α3的角度范围为45°至125°。
作为一种改进的技术方案，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构中凸起棱镜结构的高度为10至200微米。
作为一种改进的技术方案，所述背光腔体朝向所述扩散板的一面为水平面，另一面为弧面。
作为一种改进的技术方案，背光腔体为空气背光腔体。
作为一种改进的技术方案，上述方案中的所述光学膜片为扩散片、增亮片、Micro Lens和/或DBEF膜片。
作为一种改进的技术方案，所述发光单元包括PCB板、LED光源和准直透镜，所述LED光源设置在所述PCB板上。
作为一种改进的技术方案，所述发光单元利用准直透镜将LED光源发出的光线进行准直出光调整。
作为一种改进的技术方案，所述发光单元包括PCB板、LED光源和表面镀银的反射杯，所述LED光源设置在所述PCB板上。
作为一种改进的技术方案，所述发光单元利用表面镀银的反射杯来将LED光源发出的光线进行准直出光调整。
本公开还提供一种制造上述扩散板的方法，包括如下步骤：
利用聚苯乙烯材料挤出拉伸出扩散板基板；
利用预先雕刻的滚轮结构在直接在未固化的扩散板基板表面压印形成表面具有凸起棱镜结构的扩散板。
本公开还提供另一种制造上述扩散板的方法，包括如下步骤：
利用聚苯乙烯材料挤出拉伸出扩散板基板；
在所述扩散板基板表面涂覆UV光刻胶；
利用预先雕刻的滚轮结构在所述扩散板基板表面压印形成表面凸起棱镜结构；
将UV光刻胶固化后形成表面具有凸起棱镜结构的扩散板。
本公开还提供一种显示装置，其中，所述显示装置包括显示面板和上述的背光模组。
与现有技术侧入式背光模组相比较，本公开背光模组采用在扩散板的入光表面设置带有凸起棱镜的结构，发光单元采用准直透镜或镀银反射杯使LED光源出射准直光线，利用空气背光腔体，将LED光源入射到的空气背光腔体中的准直光线反射到入光表面设置有凸起棱镜结构的扩散板，将大角度光线转变为小角度光线出射到光学膜片，实现对出射光线的聚光作用，达到背光增亮的目的，甚至可去掉光学膜片所需的增亮片，从而进一步降低成本。
附图说明
图1是本公开一种背光模组优选实施例的结构原理示意图。
图2是本公开一种背光模组优选实施例中扩散板的结构原理示意图。
图3-1是本公开一种背光模组优选实施例中发光单元的一种结构原理示意图。
图3-2是本公开一种背光模组优选实施例中发光单元的另一种结构原理示意图。
具体实施方式
为使本公开的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本公开进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本公开，并不用于限定本公开。
本公开提供一种背光模组，该背光模组采用一种特殊逆棱镜结构的扩散板，配合侧入式空气背光模组，充分发挥空气背光模组成本低、光学均匀性好的优势，使得这种特殊的逆棱镜结构的扩散板在具有普通扩散板的同时也具有聚光作用，将大角度光线出射角度减小，光线均进入到背光模组中，增加正视角度亮度。如 图1背光模组优选实施例结构原理图所示，本公开背光模组包括发光单元11、背光腔体12、扩散板14和光学膜片15；所述背光腔体12、扩散板14和光学膜片15依序层叠设置；具体如图1所示，其中，所述发光单元11设置于所述背光腔体12的侧面，该背光腔体12为空气背光腔体，空气背光腔体为发光单元入射其内的光线提供一定的混光空间和混光距离，背光腔体12的背部设置为弧形反射片13，该弧形反射片的弧形通过背光腔体12的厚度及长度进行光学模拟得出。所述扩散板14朝向背光腔体12的表面设置有凸起棱镜结构，该凸起棱镜结构优选为一种锯齿状的棱镜，有朝向发光单元11侧的斜边和背向发光单元11侧的斜边，所述发光单元11出射的光入射到所述背光腔体12后折射入扩散板14，图1中仅示出了发光单元11入射到背光腔体12中的部分光线折射路线，这部分光线折射路线示出了凸起棱镜结构应用于该种背光时对大角度光线的聚光原理，对于1’等大角度光线，光线进入扩散板14后，由于背向发光单元11一侧的斜边的全反射作用，使大角度光线转变为小角度光线出射，而对于小角度光线如4’，扩散板14对其光线偏转较小，由此实现了对于出射光线的聚光作用，本公开优选实施例仅给出了该种背光模组的其中一种光学原理示意，其他具体实施例在本领域技术人员合理的使用方式均应包含在本公开技术方案之中。光学膜片15包括但不限于扩散片，增亮片，Micro LENS，DBEF等单种或多种膜片的组合，或者这些膜片进行复合的复合膜片。所述扩散板14表面的棱镜结构将背光腔体入射的大角度光线转变为小角度光线出射到所述光学膜片15。
具体而言，如图2所示，所述扩散板14有扩散板主体21和朝向背光腔体表面设置的凸起棱镜结构22，该朝向背光腔体的表面设置的凸起棱镜结构22的截面为三角形，在所述扩散板朝向背光腔体的表面设置的凸起棱镜结构22的截面三角形内角中，为保证对大角度光线聚光效果，各棱镜高度H优选一致，H优选在10-200um之间。α1、α2、α3分别为凸起棱镜结构三个内角，优选角度为：45°≤α1≤90°，10°≤α2≤45°，45°≤α3≤125°，即近发光单元的内角α1的角度范围为45°至90°，远离发光单元的内角α2的角度范围为10°至45°，凸起棱镜端的内角α3的角度范围为45°至125°。为了实现更佳的全反射效果，在一种实现方式中，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面为等腰直角三角形，也即内角α1和内角α2的角度为45°，内角α3的角度为90度。
图3-1和3-2为本公开一种背光模组优选实施例中发光单元的结构原理示意图，图3-1和3-2示意了两种发光形式，其他发光形式在这两种发光形式的合理变化下也应包括在本公开范围内，该发光单元最终达到的效果为准直作用，即使出射光线与水平法线的夹角出射角β尽可能小，在本公开优选实施例中，优选80％以上的光线出射角在10°以内。图3-1为利用透镜对LED发出的光线进行准直，图3-2为利用特殊形状反射杯对LED发出的光线进行准直。图3-1所示一种发光单元中包括PCB板31，发光源LED32，特殊形状准直透镜33，设置于PCB板31上的发光源LED32出射光线后通过特殊形状准直透镜33出射光线，特殊形状准直透镜33为现有技术，此处对其结构不做限制。图3-2所示为另一种发光单元结构，包括PCB板31、发光源LED32和表面镀银的反射杯34，同理，设置于PCB板31上的发光源LED32出射的光线通过反射杯34的反射出射准直光线。
另外，由图2可知其本公开背光模组中扩散板包括扩散板主体21和凸起棱镜结构22，该凸起棱镜结构的扩散板可以包括两种制作形式。
本公开还提供两种制造上述扩散板的方法。
制造扩散板方法实施例一：
利用聚苯乙烯材料挤出拉伸出扩散板基板；
利用预先雕刻的滚轮结构在直接在未固化的扩散板基板表面压印形成表面具有凸起棱镜结构的扩散板。
制造扩散板方法实施例二：
利用聚苯乙烯材料挤出拉伸出扩散板基板；
在所述扩散板基板表面涂覆UV光刻胶；
利用预先雕刻的滚轮结构在所述扩散板基板表面压印形成表面凸起棱镜结构；
将UV光刻胶固化后形成表面具有凸起棱镜结构的扩散板。
本公开还提供一种显示装置，所述显示装置包括显示面板和如上所述的背光模组。
应当理解的是，以上所述仅为本公开的较佳实施例而已，并不足以限制本公开的技术方案，对本领域普通技术人员来说，在本公开的精神和原则之内，可以 根据上述说明加以增减、替换、变换或改进，而所有这些增减、替换、变换或改进后的技术方案，都应属于本公开所附权利要求的保护范围。

Claims (16)

  1. 一种背光模组，其中，所述背光模组包括发光单元、背光腔体、扩散板和光学膜片；所述背光腔体、扩散板和光学膜片依序层叠设置；其中，所述发光单元设置于所述背光腔体的侧面，所述扩散板朝向背光腔体的表面设置有凸起棱镜结构，所述发光单元出射的光入射到所述背光腔体后折射入扩散板，所述扩散板表面的棱镜结构将背光腔体入射的大角度光线转变为小角度光线出射到所述光学膜片。
  2. 根据权利要求1所述的背光模组，其中，所述凸起棱镜结构为锯齿状的棱镜，其设置有朝向所述发光单元侧的斜边和背向所述发光单元侧的斜边。
  3. 根据权利要求1所述的背光模组，其中，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面为三角形。
  4. 根据权利要求3所述的背光模组，其中，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面为等腰直角三角形。
  5. 根据权利要求2所述的背光模组，其中，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构的截面三角形内角中，近发光单元的内角α1的角度范围为45°至90°，远离发光单元的内角α2的角度范围为10°至45°，凸起棱镜端的内角α3的角度范围为45°至125°。
  6. 根据权利要求1所述的背光模组，其中，所述扩散板朝向背光腔体的表面设置的凸起棱镜结构中凸起棱镜结构的高度为10至200微米。
  7. 根据权利要求1至6任一项所述的背光模组，其中，所述背光腔体朝向所述扩散板的一面为水平面，另一面为弧面。
  8. 根据权利要求7所述的背光模组，其中，背光腔体为空气背光腔体。
  9. 根据权利要求1至6任一项所述的背光模组，其中，所述光学膜片为扩散片、增亮片、Micro Lens和/或DBEF膜片。
  10. 根据权利要求1至6任一项所述的背光模组，其中，所述发光单元包括PCB板、LED光源和准直透镜，所述LED光源设置在所述PCB板上。
  11. 根据权利要求10所述的背光模组，其中，所述发光单元利用准直透镜将LED光源发出的光线进行准直出光调整。
  12. 根据权利要求1至6任一项所述的背光模组，其中，所述发光单元包括PCB板、LED光源和表面镀银的反射杯，所述LED光源设置在所述PCB板上。
  13. 根据权利要求12所述的背光模组，其中，所述发光单元利用表面镀银的反射杯来将LED光源发出的光线进行准直出光调整。
  14. 一种扩散板的制造方法，用于制造如权利要求1所述的扩散板，其中，包括如下步骤：
    利用聚苯乙烯材料挤出拉伸出扩散板基板；
    利用预先雕刻的滚轮结构在直接在未固化的扩散板基板表面压印形成表面具有凸起棱镜结构的扩散板。
  15. 一种扩散板的制造方法，用于制造如权利要求1所述的扩散板，其中，包括如下步骤：
    利用聚苯乙烯材料挤出拉伸出扩散板基板；
    在所述扩散板基板表面涂覆UV光刻胶；
    利用预先雕刻的滚轮结构在所述扩散板基板表面压印形成表面凸起棱镜结构；
    将UV光刻胶固化后形成表面具有凸起棱镜结构的扩散板。
  16. 一种显示装置，其中，所述显示装置包括显示面板及如权利要求1-14任一项所述的背光模组。
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CN1378653A (zh) * 1999-10-08 2002-11-06 3M创新有限公司 有可变角棱镜的光学薄膜
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