WO2020010757A1 - 背光模组及其制作方法与其透明液晶显示装置 - Google Patents

背光模组及其制作方法与其透明液晶显示装置 Download PDF

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Publication number
WO2020010757A1
WO2020010757A1 PCT/CN2018/113298 CN2018113298W WO2020010757A1 WO 2020010757 A1 WO2020010757 A1 WO 2020010757A1 CN 2018113298 W CN2018113298 W CN 2018113298W WO 2020010757 A1 WO2020010757 A1 WO 2020010757A1
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WIPO (PCT)
Prior art keywords
light
guide plate
groove
light guide
backlight module
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Application number
PCT/CN2018/113298
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English (en)
French (fr)
Inventor
郝思坤
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深圳市华星光电半导体显示技术有限公司
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Publication of WO2020010757A1 publication Critical patent/WO2020010757A1/zh

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Classifications

    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width 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 display technology, and in particular, to a backlight module, a manufacturing method thereof, and a transparent liquid crystal display device thereof.
  • liquid crystal displays Liquid Crystal Display, LCD
  • LCD liquid crystal Display
  • other flat display devices have been widely used in mobile phones, TVs, personal computers due to their advantages such as high picture quality, power saving, thin body, and wide application range.
  • Various consumer electronics products such as digital assistants, digital cameras, notebook computers, and desktop computers, have become mainstream in display devices.
  • liquid crystal display devices which include a liquid crystal display panel and a backlight module (backlight module).
  • the working principle of a liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates. There are many small vertical and horizontal wires in the middle of the two glass substrates. The liquid crystal molecules are controlled to change direction by turning on or off, and the light of the backlight module is changed. Refracted to produce a picture.
  • the backlight module Since the liquid crystal display panel itself does not emit light, an image is normally displayed by a light source provided by the backlight module. Therefore, the backlight module has become one of the key components of the liquid crystal display device.
  • 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.
  • Existing edge-to-edge backlight modules generally include a light guide plate, a light source provided on one side of the light guide plate, a reflection sheet provided below the light guide plate, a diffusion sheet provided above the light guide plate, and a light guide plate provided on the light guide plate.
  • the prism sheet above the diffusion sheet, wherein the optical film such as the diffusion sheet, the prism sheet, and the reflection sheet is mainly used to convert light emitted from a light source into a uniform and bright collimated surface light source.
  • the transparent display generally refers to a display that can form a transparent display state so that a viewer can see an image displayed on the display and a scene behind the display.
  • Transparent displays have many possible applications, such as windows of buildings or cars and display windows of shopping malls.
  • small devices such as handheld tablets can also benefit from transparent displays, for example, enabling users to view maps and view the front scene through the screen.
  • the opacity or scattering characteristics of optical films such as diffuser, prism, and reflector in current backlight modules limit the transmission characteristics of transparent displays. Therefore, a new backlight module that can be applied to transparent liquid crystal display devices is needed. group.
  • the main object of the present invention is to provide a backlight module, which can be applied to a transparent liquid crystal display device and has a better transparent display effect.
  • Another object of the present invention is also a method for manufacturing a backlight module.
  • the manufactured backlight module can be applied to a transparent liquid crystal display device, and the transparent display effect is better.
  • Yet another object of the present invention is to provide a transparent liquid crystal display device, which has a good transparent display effect.
  • the present invention provides a backlight module including: a light guide plate and at least one light source provided on at least one side of the light guide plate;
  • a plurality of grooves arranged at intervals are formed on the lower surface of the light guide plate, and a light reflecting layer and a light absorbing layer are provided in the groove.
  • the light reflecting layer covers the groove wall of the groove, and the light absorbing layer is provided.
  • the groove is filled on the reflective layer.
  • the groove is an arc-shaped groove or a rectangular groove.
  • a material of the light reflecting layer is a metal material
  • a material of the light absorbing layer is a black organic resin
  • the number of the light sources is one, and the one light source is disposed on one side of the light guide plate.
  • the number of the light sources is two, and the two light sources are respectively disposed on two sides of the light guide plate.
  • the invention also provides a method for manufacturing a backlight module, which includes the following steps:
  • Step S1 providing a light guide plate and forming a plurality of grooves arranged at intervals on the lower surface of the light guide plate through a first photomask process;
  • Step S2 forming a reflective film on the lower surface of the light guide plate, and patterning the reflective film through a second photomask process to form a reflective layer covering the groove wall of the groove;
  • Step S3 forming a light absorbing film on the lower surface of the light guide plate and the light reflecting layer, and patterning the light absorbing film through a third photomask process to form a light absorbing film provided on the light reflecting layer and filling the recess A light-absorbing layer of the groove;
  • Step S4 Set at least one light source on at least one side of the light guide plate.
  • the groove is an arc groove or a rectangular groove
  • the material of the light reflecting layer is a metal material
  • the material of the light absorbing layer is a black organic resin.
  • the number of the light sources is one, and the one light source is disposed on one side of the light guide plate.
  • the number of the light sources is two, and the two light source sections are disposed on both sides of the light guide plate.
  • the present invention also provides a transparent liquid crystal display device including the above-mentioned backlight module.
  • the present invention provides a backlight module including: a light guide plate and at least one light source provided on at least one side of the light guide plate; a plurality of spaced-apart arrays are formed on the lower surface of the light guide plate A groove, wherein a light reflecting layer and a light absorbing layer are provided in the groove, the light reflecting layer covers the groove wall of the groove, and the light absorbing layer is provided on the light reflecting layer and fills the groove
  • a backlight module By applying the backlight module to a transparent liquid crystal display device instead of the existing backlight module, the transparent display effect of the transparent liquid crystal display device can be improved.
  • the invention also provides a method for manufacturing a backlight module.
  • the manufactured backlight module can be applied to a transparent liquid crystal display device, and the transparent display effect is better.
  • the invention also provides a transparent liquid crystal display device, which has a good transparent display effect.
  • FIG. 1 is a schematic diagram of a backlight module of the present invention and a schematic diagram of step S4 of a manufacturing method of the backlight module of the present invention
  • FIG. 2 is a flowchart of a manufacturing method of a backlight module according to the present invention.
  • step S1 of a method for manufacturing a backlight module according to the present invention is a schematic diagram of step S1 of a method for manufacturing a backlight module according to the present invention
  • step S2 is a schematic diagram of step S2 of a method for manufacturing a backlight module of the present invention
  • FIG. 5 is a schematic diagram of step S3 of the manufacturing method of the backlight module of the present invention.
  • the present invention provides a backlight module including a light guide plate 10 and a light source 20 disposed on at least one side of the light guide plate 10.
  • a plurality of grooves 11 arranged at intervals are formed on the lower surface of the light guide plate 10.
  • a light reflecting layer 12 and a light absorbing layer 13 are provided in the groove 11, and the light reflecting layer 12 covers the groove wall of the groove 11.
  • the light absorbing layer (13) is disposed on the light reflecting layer 12 and fills the groove 11.
  • the groove 11 is an arc-shaped groove.
  • the present invention is not limited thereto, and the groove 11 may be a groove with other shapes such as a rectangular groove or a tapered groove.
  • the material of the light reflecting layer 12 is a metal material
  • the material of the light absorbing layer 13 is a black organic resin.
  • the material of the light reflecting layer 12 is a highly reflective metal such as molybdenum, titanium, and aluminum. .
  • the number of the light sources 20 is two, and two portions of the light sources 20 are provided on both sides of the light guide plate 10.
  • the present invention is not limited to this.
  • the number of the light sources 20 may be one, and the light sources 20 are disposed on one side of the light guide plate 10.
  • the light source 20 includes at least one light emitting diode (Light Emitting). Diode, LED).
  • a plurality of grooves 11 arranged at intervals are formed on the lower surface of the light guide plate 10, and the grooves 11 can destroy the total reflection inside the light guide plate 10. , So that light can be emitted from the light guide plate 10, specifically, when the light is incident on the groove 11, the light reflecting layer 12 covered on the groove wall of the groove 11 will reflect the light, As a result, the propagation direction of the light is changed, and the light is emitted from the light guide plate 10.
  • the light absorbing layer 13 is also provided in the groove 11.
  • the light absorbing layer 13 can absorb unreflected light and prevent light from exiting from the lower surface of the light guide plate 10.
  • the light absorbing layer 13 can also absorb external ambient light and prevent the ambient light from affecting the display effect. In a transparent liquid crystal display device, the display effect of the transparent liquid crystal display device can be improved.
  • the present invention also provides a method for manufacturing a backlight module, which includes the following steps:
  • Step S1 as shown in FIG. 3, a light guide plate 10 is provided, and a plurality of grooves 11 spaced apart from each other are formed on the lower surface of the light guide plate 10 through a first photomask process.
  • the step S1 includes coating a first photoresist on the lower surface of the light guide plate 10, exposing and developing the first photoresist through a first photomask, and then using the remaining first A light block is used to etch the lower surface of the light guide plate 10 to form a plurality of the grooves 11 arranged at intervals.
  • the groove 11 is an arc-shaped groove.
  • the present invention is not limited thereto, and the groove 11 may be a groove with other shapes such as a rectangular groove or a tapered groove.
  • Step S2 as shown in FIG. 4, a reflective film is formed on the lower surface of the light guide plate 10, and the reflective film is patterned through a second photomask process to form a cover wall on the groove 11 ⁇ ⁇ Reflective layer 12.
  • the step S2 includes forming a reflective film on the lower surface of the light guide plate 10 through a deposition process, coating a second photoresist on the reflective film, and passing a second photomask to the substrate.
  • the second photoresist is exposed and developed, followed by blocking with the remaining second photoresist, and etching the reflective film to form the reflective layer 12 covering the groove wall of the groove 11.
  • the material of the reflective layer 12 is a metal material.
  • the material of the reflective layer 12 is a metal with high reflectivity such as molybdenum, titanium, and aluminum.
  • Step S3 As shown in FIG. 5, a light absorbing film is formed on the lower surface of the light guide plate 10 and the light reflecting layer 12, and the light absorbing film is patterned through a third photomask process to form a light absorbing film.
  • a light absorbing layer 13 is formed on the layer 12 and fills the groove 11.
  • the step S3 includes forming a light absorbing film on the lower surface of the light guide plate 10 and the light reflecting layer 12 by a deposition process, coating a third photoresist on the light absorbing film, and passing a third photoresist.
  • a photomask exposes and develops the third photoresist, and then blocks the third photoresist, and then etches the light-absorbing film to form the light-receiving layer 12 and fill the recess.
  • the material of the light absorbing layer 13 is a black organic resin.
  • Step S4 As shown in FIG. 1, at least one light source 20 is disposed on at least one side of the light guide plate 10.
  • the light source 20 is at least one light emitting diode (Light Emitting). Diode, LED).
  • the number of the light sources 20 is two, and the light sources 20 are respectively disposed on two sides of the light guide plate 10.
  • the present invention is not limited to this.
  • the number of the light sources 20 may be one, and the light sources 20 are disposed on one side of the light guide plate 10.
  • a plurality of grooves 11 arranged at intervals are formed on the lower surface of the light guide plate 10, and the grooves 11 can destroy the total reflection inside the light guide plate 10. , So that light can be emitted from the light guide plate 10, specifically, when the light is incident on the groove 11, the light reflecting layer 12 covered on the groove wall of the groove 11 will reflect the light The light changes the propagation direction of the light and emerges from the light guide plate 10.
  • the light-absorbing layer 13 is also provided in the groove 11.
  • the light-absorbing layer 13 can absorb the light.
  • the unreflected light prevents the light from exiting from the lower surface of the light guide plate 10, and at the same time, the light absorbing layer 13 can also absorb external ambient light to prevent the ambient light from affecting the display effect.
  • the backlight module 10 of the present invention is applied to a In the transparent liquid crystal display device, the display effect of the transparent liquid crystal display device can be improved.
  • the present invention also provides a transparent liquid crystal display device including the above-mentioned backlight module, which can improve the display effect of the transparent liquid crystal display device.
  • the present invention provides a backlight module including: a light guide plate and at least one light source provided on at least one side of the light guide plate; a plurality of grooves arranged at intervals are formed on the lower surface of the light guide plate A light reflecting layer and a light absorbing layer are provided in the groove.
  • the light reflecting layer covers the groove wall of the groove.
  • the light absorbing layer is provided on the light reflecting layer and fills the groove.
  • the backlight module is applied to a transparent liquid crystal display device instead of the existing backlight module, which can improve the transparent display effect of the transparent liquid crystal display device.
  • the invention also provides a method for manufacturing a backlight module.
  • the manufactured backlight module can be applied to a transparent liquid crystal display device, and the transparent display effect is better.
  • the invention also provides a transparent liquid crystal display device, which has a good transparent display effect.

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

一种背光模组及其制作方法与透明液晶显示装置。背光模组包括：一导光板(10)及设于导光板(10)至少一侧的至少一光源(20)；导光板(10)下表面形成有间隔排列的多个凹槽(11)，凹槽(11)内设有一反光层(12)及一吸光层(13)，反光层(12)覆盖在凹槽(11)的槽壁上，吸光层(13)设于反光层(12)上并填满凹槽(11)。通过在导光板(10)下表面形成凹槽(11)并在凹槽(11)内设置反光层(12)和吸光层(13)，使得导光板(10)同时具有散射和反射功能。

Description

背光模组及其制作方法与其透明液晶显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种背光模组及其制作方法与其透明液晶显示装置。
 背景技术
随着显示技术的发展，液晶显示器（Liquid Crystal Display，LCD）等平面显示装置因具有高画质、省电、机身薄及应用范围广等优点，而被广泛的应用于手机、电视、个人数字助理、数字相机、笔记本电脑、台式计算机等各种消费性电子产品，成为显示装置中的主流。
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，其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，两片玻璃基板中间有许多垂直和水平的细小电线，通过通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。
由于液晶显示面板本身不发光，需要借由背光模组提供的光源来正常显示影像，因此，背光模组成为液晶显示装置的关键组件之一。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。现有的侧入侧入式背光模组一般包括：导光板、设于导光板一侧的光源、设于所述导光板下方的反射片、设于所述导光板上方的扩散片及设于所述扩散片上方的棱镜片，其中，所述散射片、棱镜片和反射片等光学膜片主要用于将光源发出的光线转变为均匀且高亮的准直面光源。
然而，随着显示技术的日益发展，各种新型技术不断涌现，透明显示技术因其透明的显示面板这一特性及其独特的应用，越来越受到人们的关注。透明显示器一般是指可形成透明显示状态以使观看者可看到显示器中显示的影像及显示器背后的景象的显示器。透明显示器具有许多可能的应用，例如建筑物或汽车的窗户和购物商场的展示窗。除了这些大型设备的应用以外，诸如手持式平板电脑的小型设备也可得益于透明显示器，例如，使用户能够观看地图并且能够透过屏幕观看前面的景物。而目前的背光模组中散射片、棱镜片和反射片等光学薄膜的不透明或散射特性限制了透明显示器的透过特性，因此，需要一种新的能够应用到透明液晶显示装置中的背光模组。
 技术问题
本发明的主要目的在于提供一种背光模组，能够应用到透明液晶显示装置中，且透明显示效果较好。
本发明的另一目的还在于一种背光模组的制作方法，制得的背光模组能够应用到透明液晶显示装置中，且透明显示效果较好。
本发明的再一目的还在于提供一种透明液晶显示装置，具有良好的透明显示效果。
 技术解决方案
为实现上述目的，本发明提供了一种背光模组，其包括：一导光板及设于所述导光板至少一侧的至少一光源；
所述导光板下表面形成有间隔排列的多个凹槽，所述凹槽内设有一反光层及一吸光层，所述反光层覆盖在所述凹槽的槽壁上，所述吸光层设于所述反光层上并填满所述凹槽。
在本发明的一实施例中，所述凹槽为弧形槽或矩形槽。
在本发明的一实施例中，所述反光层的材料为金属材料，所述吸光层的材料为黑色有机树脂。
在本发明的一实施例中，所述光源的数量为一个，所述一个光源设于所述导光板的一侧。
在本发明的一实施例中，所述光源的数量为两个，所述两个光源分别设于所述导光板的两侧。
本发明还提供一种背光模组的制作方法，其包括下列步骤：
步骤S1、提供一导光板，以及通过一第一光罩制程在所述导光板的下表面形成间隔排列的多个凹槽；
步骤S2、在所述导光板的下表面上形成一反光薄膜，通过一第二光罩制程图案化所述反光薄膜，形成覆盖在所述凹槽的槽壁上的一反光层；
步骤S3、在所述导光板的下表面及所述反光层上形成一吸光薄膜，通过一第三光罩制程图案化所述吸光薄膜，形成设于所述反光层上并填满所述凹槽的一吸光层；
步骤S4、在所述导光板的至少一侧设置至少一光源。
在本发明的一实施例中，所述凹槽为弧形槽或矩形槽，所述反光层的材料为金属材料，所述吸光层的材料为黑色有机树脂。
在本发明的一实施例中，所述光源的数量为一个，所述一个光源设于所述导光板的一侧。
在本发明的一实施例中，所述光源的数量为2个，所述两个光源分部设于所述导光板的两侧。
本发明还提供一种透明液晶显示装置，包括上述的背光模组。
 有益效果
本发明的有益效果：本发明提供了一种背光模组，其包括：一导光板及设于所述导光板至少一侧的至少一光源；所述导光板下表面形成有间隔排列的多个凹槽，所述凹槽内设有一反光层及一吸光层，所述反光层覆盖在所述凹槽的槽壁上，所述吸光层设于所述反光层上并填满所述凹槽，将所述背光模组取代现有的背光模组应用到一透明液晶显示装置中，能够提升所述透明液晶显示装置的透明显示效果。本发明还提供一种背光模组的制作方法，制得的所述背光模组能够应用到一透明液晶显示装置中，且透明显示效果较好。本发明还提供一种透明液晶显示装置，具有良好的透明显示效果。
 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。
图1为本发明的背光模组的示意图暨本发明的背光模组的制作方法的步骤S4的示意图；
图2为本发明的背光模组的制作方法的流程图；
图3为本发明的背光模组的制作方法的步骤S1的示意图；
图4为本发明的背光模组的制作方法的步骤S2的示意图；
图5为本发明的背光模组的制作方法的步骤S3的示意图。
 本发明的实施方式
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1，本发明提供一种背光模组，包括：一导光板10及设于所述导光板10至少一侧的光源20。
所述导光板10下表面形成有间隔排列的多个凹槽11，所述凹槽11内设有一反光层12及一吸光层13，所述反光层12覆盖在所述凹槽11的槽壁上，所述吸光层（13）设于所述反光层12上并填满所述凹槽11。
具体地，所述凹槽11为弧形槽，当然本发明并不限于此，所述凹槽11也可以为矩形槽或锥形槽等其他形状的凹槽。
具体地，所述反光层12的材料为一金属材料，所述吸光层13的材料为一黑色有机树脂，优选地，所述反光层12的材料为钼、钛及铝等高反射率的金属。
可选地，如图1所示，在本发明的一些实施例中，所述光源20的数量为两个，两个所述光源20分部设于所述导光板10的两侧。
当然本发明并不限于此，在本发明的其他实施例中，所述光源20的数量也可以为一个，所述光源20设于所述导光板10的一侧。
优选地，所述光源20由至少一发光二极管（Light Emitting Diode，LED）构成。
需要说明的是，如图1所示，本发明中，所述导光板10下表面形成有间隔排列的多个凹槽11，所述凹槽11能够破坏所述导光板10的内部的全反射，使得光线能够从所述导光板10中出射，具体为当光线射到所述凹槽11上时，所述凹槽11的槽壁上所覆盖的所述反光层12将反射所述光线，使得所述光线的传播方向被改变，从所述导光板10中出射。
与此同时，在所述凹槽11内还设有所述吸光层13，当射到所述凹槽11上的所述光线未能被所述反光层12全部反射时，所述吸光层13能够吸收未被反射的光线，避免光线从所述导光板10的下表面射出，同时所述吸光层13还能吸收外界环境光，避免环境光影响显示效果，将本发明的背光模组10应用到一透明液晶显示装置中，能够提升所述透明液晶显示装置的显示效果。
请参阅图2，本发明还提供一种背光模组的制作方法，包括如下步骤：
步骤S1、如图3所示，提供一导光板10，以及通过一第一光罩制程在所述导光板10的下表面形成间隔排列的多个凹槽11。
具体地，所述步骤S1具体包括在所述导光板10的下表面涂布一第一光阻，并通过一第一光罩对第一光阻进行曝光、显影，接着以剩余的所述第一光阻遮挡，对导光板10的下表面进行蚀刻，形成间隔排列的多个所述凹槽11。
具体地，所述凹槽11为弧形槽，当然本发明并不限于此，所述凹槽11也可以为矩形槽或锥形槽等其他形状的凹槽。
步骤S2、如图4所示，在所述导光板10的下表面上形成一反光薄膜，通过一第二光罩制程图案化所述反光薄膜，形成覆盖在所述凹槽11的槽壁上的一反光层12。
具体地，所述步骤S2具体包括通过沉积工艺在所述导光板10的下表面上形成一反光薄膜，在所述反光薄膜上涂布一第二光阻，并通过一第二光罩对所述第二光阻进行曝光、显影，接着以剩余的所述第二光阻进行遮挡，对所述反光薄膜进行蚀刻，形成覆盖在所述凹槽11的槽壁上的所述反光层12。
具体地，所述反光层12的材料为一金属材料，优选地，所述反光层12的材料为钼、钛及铝等高反射率的金属。
步骤S3、如图5所示，在所述导光板10的下表面及所述反光层12上形成一吸光薄膜，通过一度第三光罩制程图案化所述吸光薄膜，形成设于所述反光层12上并填满所述凹槽11的一吸光层13。
具体地，所述步骤S3具体包括通过沉积工艺在所述导光板10的下表面及反光层12上形成一吸光薄膜，在所述吸光薄膜上涂布一第三光阻，并通过一第三光罩对所述第三光阻进行曝光、显影，接着以剩余的所述第三光阻进行遮挡，对所述吸光薄膜进行蚀刻，形成设于所述反光层12上并填满所述凹槽11的所述吸光层13。
具体地，所述吸光层13的材料为一黑色有机树脂，
步骤S4、如图1所示，在所述导光板10的至少一侧设置至少一光源20。
优选地，所述光源20为至少一发光二极管（Light Emitting Diode，LED）构成的光源。
可选地，如图1所示，在本发明的一些实施例中，所述光源20的数量为两个，所述光源20分别设于所述导光板10的两侧。
当然本发明并不限于此，在本发明的其他实施例中，所述光源20的数量也可以为一个，所述光源20设于所述导光板10的一侧。
需要说明的是，如图1所示，本发明中，所述导光板10下表面形成有间隔排列的多个凹槽11，所述凹槽11能够破坏所述导光板10的内部的全反射，使得光线能够从所述导光板10中出射，具体为当所述光线射到所述凹槽11上时，所述凹槽11的槽壁上所覆盖的所述反光层12将反射所述光线，使得所述光线的传播方向改变，从所述导光板10中出射。
与此同时，在所述凹槽11内还设有所述吸光层13，当射到所述凹槽11上的光线未能被所述反光层12全部反射时，所述吸光层13能够吸收未被反射的光线，避免光线从所述导光板10的下表面射出，同时所述吸光层13还能吸收外界环境光，避免环境光影响显示效果，将本发明的背光模组10应用到一透明液晶显示装置中，能够提升所述透明液晶显示装置的显示效果。
基于上述的背光模组，本发明还提供一种透明液晶显示装置，包括上述的背光模组，能够提升透明液晶显示装置的显示效果。
综上所述，本发明提供了一种背光模组，包括：一导光板及设于所述导光板至少一侧的至少一光源；所述导光板下表面形成有间隔排列的多个凹槽、所述凹槽内设有一反光层及一吸光层，所述反光层覆盖在所述凹槽的槽壁上，所述吸光层设于所述反光层上并填满所述凹槽，将所述背光模组取代现有的背光模组应用到一透明液晶显示装置中，能够提升所述透明液晶显示装置的透明显示效果。本发明还提供一种背光模组的制作方法，制得的背光模组能够应用到一透明液晶显示装置中，且透明显示效果较好。本发明还提供一种透明液晶显示装置，具有良好的透明显示效果。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (14)

  1. 一种背光模组，其包括：一导光板（10）及设于所述导光板（10）至少一侧的至少一光源（20）；
    其中所述导光板（10）的下表面形成有间隔排列的多个凹槽（11），所述凹槽（11）内设有一反光层（12）及一吸光层（13），所述反光层（12）覆盖在所述凹槽（11）的槽壁上，所述吸光层（13）设于所述反光层（12）上并填满所述凹槽（11）。
  2. 如权利要求1所述的背光模组，其中所述凹槽（11）为一弧形槽或一矩形槽。
  3. 如权利要求1所述的背光模组，其中所述反光层（12）的材料为一金属材料，所述吸光层（13）的材料为一黑色有机树脂。
  4. 如权利要求1所述的背光模组，其中所述光源（20）的数量为一个，所述光源（20）设于所述导光板（10）的一侧。
  5. 如权利要求1所述的背光模组，其中所述光源（20）的数量为两个，所述光源（20）分别设于所述导光板（10）的两侧。
  6. 一种背光模组的制作方法，其包括如下步骤：
    步骤S1、提供一导光板（10），以及通过一第一光罩制程在所述导光板（10）的下表面形成间隔排列的多个凹槽（11）；
    步骤S2、在所述导光板（10）的下表面上形成一反光薄膜，通过一第二光罩制程图案化所述反光薄膜，形成覆盖在所述凹槽（11）的槽壁上的一反光层（12）；
    步骤S3、在所述导光板（10）的下表面及所述反光层（12）上形成一吸光薄膜，通过一第三光罩制程图案化所述吸光薄膜，形成设于所述反光层（12）上并填满所述凹槽（11）的一吸光层（13）；
    步骤S4、在所述导光板（10）的至少一侧设置至少一光源（20）。
  7. 如权利要求6所述的背光模组的制作方法，其中所述凹槽（11）为一弧形槽或一矩形槽，所述反光层（12）的材料为一金属材料，所述吸光层（13）的材料为一黑色有机树脂。
  8. 如权利要求6所述的背光模组的制作方法，其中所述光源（20）的数量为一个，所述光源（20）设于所述导光板（10）的一侧。
  9. 如权利要求6所述的背光模组的制作方法，其中所述光源（20）的数量为两个，所述光源（20）分别设于所述导光板（10）的两侧。
  10. 一种透明液晶显示装置，其包括一背光模组，所述背光模组包括：一导光板（10）及设于所述导光板（10）至少一侧的至少一光源（20）；
    其中所述导光板（10）的下表面形成有间隔排列的多个凹槽（11），所述凹槽（11）内设有一反光层（12）及一吸光层（13），所述反光层（12）覆盖在所述凹槽（11）的槽壁上，所述吸光层（13）设于所述反光层（12）上并填满所述凹槽（11）。
  11. 如权利要求10所述的透明液晶显示装置，其中所述凹槽（11）为一弧形槽或一矩形槽。
  12. 如权利要求10所述的透明液晶显示装置，其中所述反光层（12）的材料为一金属材料，所述吸光层（13）的材料为一黑色有机树脂。
  13. 如权利要求10所述的透明液晶显示装置，其中所述光源（20）的数量为一个，所述光源（20）设于所述导光板（10）的一侧。
  14. 如权利要求10所述的透明液晶显示装置，其中所述光源（20）的数量为两个，所述光源（20）分别设于所述导光板（10）的两侧。
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