WO2020258516A1 - 背光模块及其透光率的调控方法 - Google Patents

背光模块及其透光率的调控方法 Download PDF

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Publication number
WO2020258516A1
WO2020258516A1 PCT/CN2019/104572 CN2019104572W WO2020258516A1 WO 2020258516 A1 WO2020258516 A1 WO 2020258516A1 CN 2019104572 W CN2019104572 W CN 2019104572W WO 2020258516 A1 WO2020258516 A1 WO 2020258516A1
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liquid crystal
polymer network
network liquid
backlight module
emitting diodes
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PCT/CN2019/104572
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English (en)
French (fr)
Inventor
刘凡成
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US16/638,242 priority Critical patent/US11397349B2/en
Publication of WO2020258516A1 publication Critical patent/WO2020258516A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133601—Illuminating devices for spatial active dimming
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • G02F1/13345—Network or three-dimensional gels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the invention relates to the field of displays, in particular to a backlight module and a method for adjusting and controlling its light transmittance.
  • the large intercept of the light emitting diode (LED) requires a large optical distance (OD) from the light source to the film to shield the shadow of the LED, for example, the intercept is greater than 2 mm, which may require 1.0
  • the OD of mm ⁇ 1.5mm can shield the shadow of the LED lights.
  • the present invention provides a new backlight module and its light transmittance control method.
  • a continuously adjustable light source to film distance optical distance, OD.
  • OD optical distance
  • the intercepts of the light-emitting diodes are different, there is no need to change the OD and the overall thickness of the liquid crystal display module.
  • Only the polymer network liquid crystal (polymer network liquid crystal, The light transmittance of the PNLC) film can produce different degrees of shielding, resulting in a small OD backlight module, reducing the overall thickness of the display, and improving the stability of the module design.
  • the present invention provides a backlight module, including: a substrate; a plurality of micro light-emitting diodes arranged on the substrate at intervals; a polymer network liquid crystal layer arranged on the plurality of Above the micro light emitting diode, wherein the polymer network liquid crystal layer has a multilayer structure or a single layer structure; and an optical function layer is disposed above the polymer network liquid crystal layer.
  • the polymer network liquid crystal layer includes a patterned upper surface and/or a patterned lower surface corresponding to the plurality of micro light emitting diodes.
  • the polymer network liquid crystal layer includes a plurality of empty liquid crystal cells corresponding to regions other than the plurality of micro light emitting diodes, so that the polymer network corresponding to the plurality of micro light emitting diodes
  • the network liquid crystal has a first thickness
  • the polymer network liquid crystal corresponding to a region other than the plurality of micro light emitting diodes has a second thickness, and the first thickness is greater than the second thickness.
  • the optical function layer is a multilayer structure or a single layer structure, and the optical function layer includes a brightness enhancement film.
  • the present invention also provides a method for adjusting the light transmittance of a backlight module, including the following steps: S10 provides a backlight module, including: a substrate; On the substrate; a polymer network liquid crystal layer, which is arranged above the plurality of micro light emitting diodes; and an optical function layer, which is arranged above the polymer network liquid crystal layer.
  • the method for adjusting the light transmittance of the backlight module further includes: S20a atomizing the polymer network liquid crystal layer includes: providing a driving voltage to the polymer network liquid crystal layer, and Utilizing UV to irradiate the polymer network liquid crystal layer to cure the polymer network liquid crystal layer and have an atomized structure.
  • the method for adjusting the light transmittance of the backlight module further includes: S20b patterning the polymer network liquid crystal layer so that the polymer network liquid crystal layer has at least one patterned surface, wherein The intercept of the at least one patterned surface corresponds to the intercept of the plurality of micro light emitting diodes, and the pattern corresponds to shielding the plurality of micro light emitting diodes and exposing areas other than the plurality of micro light emitting diodes.
  • the backlight module further includes: a plurality of transparent electrodes are arranged on the upper and lower sides of the polymer network liquid crystal layer, and the method for adjusting the light transmittance of the backlight module is further Including: S20c dividing the polymer network liquid crystal layer into a plurality of blocks by the plurality of transparent electrodes, and providing different voltages to the plurality of transparent electrodes to continuously adjust the respective light transmittance of the plurality of blocks rate.
  • the polymer network liquid crystal layer includes a plurality of empty liquid crystal cells respectively corresponding to regions other than the plurality of micro light emitting diodes, so as to correspond to the plurality of micro light emitting diodes.
  • the polymer network liquid crystal has a first thickness
  • the polymer network liquid crystal corresponding to a region other than the plurality of micro light emitting diodes has a second thickness
  • the first thickness is greater than the second thickness
  • the polymer network liquid crystal having the first thickness improves the shielding properties of the plurality of micro light-emitting diodes to reduce light transmittance
  • the polymer network liquid crystal having the second thickness reduces the resistance to the The shielding properties of the areas other than the multiple micro light-emitting diodes improve the light transmittance.
  • Another embodiment of the present invention also provides a display including the backlight module.
  • the present invention provides a new backlight module and a method for adjusting light transmittance thereof.
  • a continuously adjustable light source to film distance optical distance, OD.
  • OD optical distance
  • the intercepts of the light-emitting diodes are different, there is no need to change the OD and the overall thickness of the liquid crystal display module.
  • Only the polymer network liquid crystal (polymer network liquid crystal, The light transmittance of the PNLC) film can produce different degrees of shielding, resulting in a small OD backlight module, reducing the overall thickness of the display, and improving the stability of the module design.
  • Fig. 1 is a schematic diagram of a backlight module according to a first embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for adjusting and controlling the light transmittance of a backlight module according to the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a backlight module according to a second embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for adjusting and controlling the light transmittance of a backlight module according to a second embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a backlight module according to a third embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for adjusting and controlling the light transmittance of a backlight module according to a third embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a backlight module according to a fourth embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for adjusting and controlling the light transmittance of a backlight module according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a display according to an embodiment of the invention.
  • the present invention provides a new backlight module and a method for adjusting light transmittance thereof.
  • a continuously adjustable light source to film distance optical distance, OD.
  • OD optical distance
  • the intercepts of the light-emitting diodes are different, there is no need to change the OD and the overall thickness of the liquid crystal display module.
  • Only the polymer network liquid crystal (polymer network liquid crystal, The light transmittance of the PNLC) film can produce different degrees of shielding, resulting in a small OD backlight module, reducing the overall thickness of the display, and improving the stability of the module design.
  • a single-layer or multi-layer polymer network liquid crystal (PNLC) film is used to replace the diffusion film or the diffusion plate in the backlight module of the conventional liquid crystal display module.
  • PNLC polymer network liquid crystal
  • Fig. 1 is a schematic diagram of a backlight module according to a first embodiment of the present invention.
  • 2 is a flowchart of a method for adjusting and controlling the light transmittance of a backlight module according to the first embodiment of the present invention. 1 and 2 together, specifically, the method for adjusting the light transmittance of the backlight module 100 of the present invention includes the following steps:
  • S10 provides a backlight module 100, including: a substrate 10; a plurality of micro light emitting diodes 20 arranged on the substrate 10 at intervals; a polymer network liquid crystal layer 30 arranged above the plurality of micro light emitting diodes 20; and optical functions
  • the layer 40 is disposed above the polymer network liquid crystal layer 30, as shown in FIG. 1.
  • Atomizing the polymer network liquid crystal layer 30 includes: providing a driving voltage to the polymer network liquid crystal layer 30, and irradiating the polymer network liquid crystal layer 30 with UV to make the polymer network liquid crystal layer 30 30 is cured and has an atomized structure 31.
  • the second embodiment of the present invention is substantially the same as the first embodiment.
  • the difference is that the second embodiment of the present invention uses a patterned surface haze treatment on the polymer network liquid crystal layer, which increases the opacity at the same time. Minimize the loss of light transmittance.
  • FIG. 3 is a schematic diagram of a backlight module 200 according to a second embodiment of the present invention.
  • 4 is a flowchart of a method for adjusting the light transmittance of the backlight module 200 according to the second embodiment of the present invention. Referring to FIGS. 3 and 4 together, specifically, the method for adjusting the light transmittance of the backlight module 200 of the present invention includes the following steps:
  • S10 provides a backlight module 200, including: a substrate 10; a plurality of micro light emitting diodes 20 arranged on the substrate 10 at intervals; a polymer network liquid crystal layer 30 arranged on the plurality of micro light emitting diodes 20; and optical functions
  • the layer 40 is disposed above the polymer network liquid crystal layer 30, as shown in FIG. 3.
  • S20b Pattern the polymer network liquid crystal layer 30 so that the polymer network liquid crystal layer 30 has at least one patterned surface, wherein the intercept D of the at least one patterned surface corresponds to the plurality of micro light emitting diodes
  • the intercept D of 20, the pattern 32 correspondingly shields the plurality of micro LEDs 20 and exposes areas other than the plurality of micro LEDs 20.
  • the polymer network liquid crystal layer 30 may have a patterned surface, or have two opposite patterned surfaces.
  • the third embodiment of the present invention is substantially the same as the first embodiment. The difference is that the third embodiment of the present invention is provided with a plurality of transparent electrodes 50 on the upper and lower sides of the polymer network liquid crystal layer 30.
  • the transparent electrode divides the polymer network liquid crystal layer into a plurality of blocks, thereby continuously adjusting the respective light transmittance of the plurality of blocks.
  • FIG. 5 is a schematic diagram of a backlight module 300 according to a third embodiment of the present invention.
  • 6 is a flowchart of a method for adjusting and controlling the light transmittance of the backlight module 300 according to the third embodiment of the present invention. Referring to FIGS. 5 and 6 together, specifically, the method for adjusting the light transmittance of the backlight module 300 of the present invention includes the following steps:
  • S10 provides a backlight module 300, including: a substrate 10; a plurality of micro light emitting diodes 20 arranged on the substrate 10 at intervals; a polymer network liquid crystal layer 30 arranged on the plurality of micro light emitting diodes 20; The electrodes 50 are arranged on the upper and lower sides of the polymer network liquid crystal layer 30; and the optical function layer 40 is arranged on the polymer network liquid crystal layer 30, as shown in FIG. 5.
  • the polymer network liquid crystal layer 30 is divided into a plurality of blocks 33 by the plurality of transparent electrodes 50, and different voltages are provided to the plurality of transparent electrodes 50 to continuously adjust each of the plurality of blocks 33 ⁇ Transmittance.
  • the fourth embodiment of the present invention is roughly the same as the first embodiment. The difference is that the fourth embodiment of the present invention uses a patterned double liquid crystal cell thickness design, so that the polymer network liquid crystal layer is thicker. It has greater diffusivity and lower light transmittance to improve the shielding properties of larger thickness.
  • FIG. 7 is a schematic diagram of a backlight module 400 according to a fourth embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for adjusting the light transmittance of the backlight module 400 according to the fourth embodiment of the present invention. Referring to FIGS. 7 and 8 together, specifically, the method for adjusting the light transmittance of the backlight module 400 of the present invention includes the following steps:
  • S10 provides a backlight module 400, including: a substrate 10; a plurality of micro light emitting diodes 20 arranged on the substrate 10 at intervals; a polymer network liquid crystal layer 30 arranged on the plurality of micro light emitting diodes 20; and optical functions
  • the layer 40 is disposed above the polymer network liquid crystal layer 30, as shown in FIG. 7.
  • the polymer network liquid crystal layer 30 includes a plurality of empty liquid crystal cells 34 respectively corresponding to the areas other than the plurality of micro light emitting diodes 20, so that the regions corresponding to the plurality of micro light emitting diodes 20
  • the polymer network liquid crystal has a first thickness H1, and the polymer network liquid crystal corresponding to the area outside the plurality of micro light emitting diodes 20 has a second thickness H2, the first thickness H1 is greater than the second thickness H2,
  • the polymer network liquid crystal having the first thickness H1 improves the shielding properties of the plurality of micro light emitting diodes 20 to reduce the light transmittance, and the polymer network having the second thickness H2
  • the liquid crystal reduces the shielding properties of areas other than the plurality of micro light emitting diodes 20 to increase the light transmittance.
  • the optical function layer 40 and the polymer network liquid crystal layer 30 may each independently be a single layer or multiple layers.
  • the optical function layer 40 may include a brightness enhancement film.
  • FIG. 9 is a schematic diagram of a display according to an embodiment of the invention.
  • another embodiment of the present invention also provides a display 1 including the backlight module 100 and a display screen 1000 disposed on the backlight module 100.
  • the backlight module of the display 1 can be selected from one of the following: the backlight module 100, the backlight module 200, the backlight module 300, the backlight module 400, and combinations thereof (Figure Not shown).
  • the backlight module and the method for adjusting light transmittance provided by the present invention can realize a continuously adjustable distance from the light source to the film in a liquid crystal display module using micro light emitting diodes. distance, OD).
  • distance, OD micro light emitting diodes.
  • the intercepts of the light-emitting diodes are different, there is no need to change the OD and the overall thickness of the liquid crystal display module.
  • Only the polymer network liquid crystal (polymer network liquid crystal, The light transmittance of the PNLC) film can produce different degrees of shielding, resulting in a small OD backlight module, reducing the overall thickness of the display, and improving the stability of the module design.

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

一种背光模块及其透光率的调控方法，背光模块（100）包括：基板（10）；多个微型发光二极管（20），间隔配置于基板（10）上；聚合物网络液晶层（30），配置于多个微型发光二极管（20）上方，其中，聚合物网络液晶层（30）是多层结构或单层结构；以及光学功能层（40），配置于聚合物网络液晶层（30）上方。

Description

背光模块及其透光率的调控方法 技术领域
本发明涉及一种显示器领域，尤其涉及一种背光模块及其透光率的调控方法。
 背景技术
直下式微型发光二极管(mini-LED)灯板，发光二极管(LED)大截距需要大的光源到薄膜距离(optical distance, OD)来遮蔽LED灯影，例如截距大于2 mm，可能会需要1.0mm~1.5mm的OD来遮蔽LED灯影。
大OD会导致模组设计困难，使液晶显示器模块(liquid crystal display module, LCM)结构稳定性变差。且因为扩散板厚度非连续变化，会产生OD设计过剩，比如现有扩散板（厚度0.8~1.0~1.2~1.5），从而增加液晶显示器模块的整体厚度。
 技术问题
亟需一种背光模块，在利用微型发光二极管的液晶显示器模块中，实现连续可调的透光率，当发光二极管的截距不同时，无需改变OD、无需改变液晶显示器模块的整体厚度，仅需控制聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜的透光率即可产生不同程度的遮蔽性。
 技术解决方案
有鉴于此，本发明提供一种新的背光模块及其透光率的调控方法，在利用微型发光二极管的液晶显示器模块中，实现连续可调的光源到薄膜距离(optical distance, OD)，当发光二极管的截距不同时，无需改变OD、无需改变液晶显示器模块的整体厚度，仅需控制聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜的透光率即可产生不同程度的遮蔽性，得到小OD的背光模块，降低显示器的整体厚度，并且提高模块设计的稳定性。
据此，依据本发明的一实施例，本发明提供了一种背光模块，包括：基板；多个微型发光二极管，间隔配置于所述基板上；聚合物网络液晶层，配置于所述多个微型发光二极管上方，其中，所述聚合物网络液晶层是多层结构或单层结构；以及光学功能层，配置于所述聚合物网络液晶层上方。
依据本发明的一实施例，所述聚合物网络液晶层包括对应于所述多个微型发光二极管的图案化上表面及/或图案化下表面。
依据本发明的一实施例，所述聚合物网络液晶层包括多个液晶空盒分别对应至所述多个微型发光二极管以外的区域，使对应至所述多个微型发光二极管的所述聚合物网络液晶具有第一厚度，对应至所述多个微型发光二极管以外的区域的所述聚合物网络液晶具有第二厚度，所述第一厚度大于所述第二厚度。
依据本发明的一实施例，所述光学功能层是多层结构或单层结构，所述光学功能层包括增亮膜。
依据本发明的再一实施例，本发明还提供了一种背光模块透光率的调控方法，包括以下步骤：S10 提供一背光模块，包括：基板；多个微型发光二极管，间隔配置于所述基板上；聚合物网络液晶层，配置于所述多个微型发光二极管上方；以及光学功能层，配置于所述聚合物网络液晶层上方。
依据本发明的一实施例，所述背光模块透光率的调控方法更包括：S20a 对所述聚合物网络液晶层进行雾化处理，包括：提供驱动电压给所述聚合物网络液晶层，并且利用UV照射所述聚合物网络液晶层使所述聚合物网络液晶层固化并具有雾化结构。
依据本发明的一实施例，所述背光模块透光率的调控方法更包括：S20b 对所述聚合物网络液晶层进行图案化，使所述聚合物网络液晶层具有至少一图案化表面，其中所述至少一图案化表面的截距对应所述多个微型发光二极管的截距，所述图案对应遮蔽所述多个微型发光二极管并且露出多个微型发光二极管以外的区域。
依据本发明的一实施例，在步骤S10中，所述背光模块更包括：多个透明电极配置于所述聚合物网络液晶层的上下两侧，且所述背光模块透光率的调控方法更包括：S20c 藉由所述多个透明电极将所述聚合物网络液晶层分成多个区块，提供不同电压给所述多个透明电极，以连续调整所述多个区块的各自的透光率。
依据本发明的一实施例，在步骤S10中，所述聚合物网络液晶层包括多个液晶空盒分别对应至所述多个微型发光二极管以外的区域，使对应至所述多个微型发光二极管的所述聚合物网络液晶具有第一厚度，对应至所述多个微型发光二极管以外的区域的所述聚合物网络液晶具有第二厚度，所述第一厚度大于所述第二厚度，藉由具有所述第一厚度的所述聚合物网络液晶提高所述多个微型发光二极管的遮蔽性以降低透光率，以及藉由具有所述第二厚度的所述聚合物网络液晶降低对所述多个微型发光二极管以外的区域的遮蔽性以提高透光率。
本发明的另一实施例还提供了一种显示器，包括所述背光模块。
 有益效果
本发明提供一种新的背光模块及其透光率的调控方法，在利用微型发光二极管的液晶显示器模块中，实现连续可调的光源到薄膜距离(optical distance, OD)，当发光二极管的截距不同时，无需改变OD、无需改变液晶显示器模块的整体厚度，仅需控制聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜的透光率即可产生不同程度的遮蔽性，得到小OD的背光模块，降低显示器的整体厚度，并且提高模块设计的稳定性。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为依据本发明第一实施例的背光模块示意图。
图2为依据本发明第一实施例的背光模块的透光率的调控方法的流程图。
图3为依据本发明第二实施例的背光模块示意图。
图4为依据本发明第二实施例的背光模块的透光率的调控方法的流程图。
图5为依据本发明第三实施例的背光模块示意图。
图6为依据本发明第三实施例的背光模块的透光率的调控方法的流程图。
图7为依据本发明第四实施例的背光模块示意图。
图8为依据本发明第四实施例的背光模块的透光率的调控方法的流程图。
图9为依据本发明一实施例的显示器示意图。
 本发明的最佳实施方式
为让本发明的上述内容能更明显易懂，下文特举优选实施例，并配合所附图式作详细说明。
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[纵向]、[横向]、[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
为解决习知技术的问题，本发明提供一种新的背光模块及其透光率的调控方法，在利用微型发光二极管的液晶显示器模块中，实现连续可调的光源到薄膜距离(optical distance, OD)，当发光二极管的截距不同时，无需改变OD、无需改变液晶显示器模块的整体厚度，仅需控制聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜的透光率即可产生不同程度的遮蔽性，得到小OD的背光模块，降低显示器的整体厚度，并且提高模块设计的稳定性。
第一实施例
在本发明的第一实施例中，利用单层或者多层的聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜，来替代习知液晶显示器模块的背光模块中的扩散膜或扩散板。
图1为依据本发明第一实施例的背光模块示意图。图2为依据本发明第一实施例的背光模块的透光率的调控方法的流程图。一并参见图1及图2，具体而言，本发明的背光模块100的透光率的调控方法，包括以下步骤：
S10 提供一背光模块100，包括：基板10；多个微型发光二极管20，间隔配置于所述基板10上；聚合物网络液晶层30，配置于所述多个微型发光二极管20上方；以及光学功能层40，配置于所述聚合物网络液晶层30上方，如图1所示。
S20a 对所述聚合物网络液晶层30进行雾化处理，包括：提供驱动电压给所述聚合物网络液晶层30，并且利用UV照射所述聚合物网络液晶层30使所述聚合物网络液晶层30固化并具有雾化结构31。
第二实施例
本发明的第二实施例与第一实施例大致相同，相异处在于，本发明的第二实施例对所述聚合物网络液晶层采用图案化的表面雾度处理，在增加遮蔽性的同时尽量减少透光率的损失。
图3为依据本发明第二实施例的背光模块200示意图。图4为依据本发明第二实施例的背光模块200的透光率的调控方法的流程图。一并参见图3及图4，具体而言，本发明的背光模块200的透光率的调控方法，包括以下步骤：
S10 提供一背光模块200，包括：基板10；多个微型发光二极管20，间隔配置于所述基板10上；聚合物网络液晶层30，配置于所述多个微型发光二极管20上方；以及光学功能层40，配置于所述聚合物网络液晶层30上方，如图3所示。
S20b 对所述聚合物网络液晶层30进行图案化，使所述聚合物网络液晶层30具有至少一图案化表面，其中所述至少一图案化表面的截距D对应所述多个微型发光二极管20的截距D，所述图案32对应遮蔽所述多个微型发光二极管20并且露出多个微型发光二极管20以外的区域。
在本实施例中，所述聚合物网络液晶层30可具有一图案化表面，或具有相对的两个图案化表面。
第三实施例
本发明的第三实施例与第一实施例大致相同，相异处在于，本发明的第三实施例在所述聚合物网络液晶层30的上下两侧配置多个透明电极50，利用多个透明电极将所述聚合物网络液晶层分成多个区块，藉以连续调整所述多个区块的各自的透光率。
图5为依据本发明第三实施例的背光模块300示意图。图6为依据本发明第三实施例的背光模块300的透光率的调控方法的流程图。一并参见图5及图6，具体而言，本发明的背光模块300的透光率的调控方法，包括以下步骤：
S10 提供一背光模块300，包括：基板10；多个微型发光二极管20，间隔配置于所述基板10上；聚合物网络液晶层30，配置于所述多个微型发光二极管20上方；多个透明电极50配置于所述聚合物网络液晶层30的上下两侧；以及光学功能层40，配置于所述聚合物网络液晶层30上方，如图5所示。
S20c 藉由所述多个透明电极50将所述聚合物网络液晶层30分成多个区块33，提供不同电压给所述多个透明电极50，以连续调整所述多个区块33的各自的透光率。
第四实施例
本发明的第四实施例与第一实施例大致相同，相异处在于，本发明的第四实施例利用图案化的双液晶盒厚度设计的，使所述聚合物网络液晶层在较大厚度处具有较大的扩散性及较低的透光率，以提高较大厚度处的遮蔽性。
图7为依据本发明第四实施例的背光模块400示意图。图8为依据本发明第四实施例的背光模块400的透光率的调控方法的流程图。一并参见图7及图8，具体而言，本发明的背光模块400的透光率的调控方法，包括以下步骤：
S10 提供一背光模块400，包括：基板10；多个微型发光二极管20，间隔配置于所述基板10上；聚合物网络液晶层30，配置于所述多个微型发光二极管20上方；以及光学功能层40，配置于所述聚合物网络液晶层30上方，如图7所示。
在本实施例中，所述聚合物网络液晶层30包括多个液晶空盒34分别对应至所述多个微型发光二极管20以外的区域，使对应至所述多个微型发光二极管20的所述聚合物网络液晶具有第一厚度H1，对应至所述多个微型发光二极管20以外的区域的所述聚合物网络液晶具有第二厚度H2，所述第一厚度H1大于所述第二厚度H2，藉由具有所述第一厚度H1的所述聚合物网络液晶提高所述多个微型发光二极管20的遮蔽性以降低透光率，以及藉由具有所述第二厚度H2的所述聚合物网络液晶降低对所述多个微型发光二极管20以外的区域的遮蔽性以提高透光率。
在上述多个实施例中，所述光学功能层40及所述聚合物网络液晶层30可各自独立地为单层或多层。
在上述多个实施例中，所述光学功能层40可包括增亮膜。
图9为依据本发明一实施例的显示器示意图。参见图9，本发明的另一实施例还提供了一种显示器1，包括所述背光模块100及配置于所述背光模块100上的显示屏1000。
依据本发明的其他实施例，显示器1的背光模块可择自下列之一者：所述背光模块100、所述背光模块200、所述背光模块300、所述背光模块400、及其组合(图未示)。
依据本发明所揭示的多个实施例可知，本发明提供的背光模块及其透光率的调控方法，可在利用微型发光二极管的液晶显示器模块中，实现连续可调的光源到薄膜距离(optical distance, OD)，当发光二极管的截距不同时，无需改变OD、无需改变液晶显示器模块的整体厚度，仅需控制聚合物网络液晶(polymer network liquid crystal, PNLC)薄膜的透光率即可产生不同程度的遮蔽性，得到小OD的背光模块，降低显示器的整体厚度，并且提高模块设计的稳定性。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (13)

  1. 一种背光模块，包括：
    基板；
    多个微型发光二极管，间隔配置于所述基板上；
    聚合物网络液晶层，配置于所述多个微型发光二极管上方，其中，所述聚合物网络液晶层是多层结构或单层结构；以及
    光学功能层，配置于所述聚合物网络液晶层上方。
  2. 根据权利要求1所述的背光模块，其中所述背光模块更包括多个透明电极配置于所述聚合物网络液晶层的上下两侧。
  3. 根据权利要求1所述的背光模块，其中所述聚合物网络液晶层包括对应于所述多个微型发光二极管的图案化上表面及/或图案化下表面。
  4. 根据权利要求1所述的背光模块，其中所述聚合物网络液晶层包括多个液晶空盒分别对应至所述多个微型发光二极管以外的区域，使对应至所述多个微型发光二极管的所述聚合物网络液晶具有第一厚度，对应至所述多个微型发光二极管以外的区域的所述聚合物网络液晶具有第二厚度，所述第一厚度大于所述第二厚度。
  5. 根据权利要求1所述的背光模块，其中所述光学功能层是多层结构或单层结构，所述光学功能层包括增亮膜。
  6. 一种显示器，包括如权利要求1所述的背光模块。
  7. 一种背光模块透光率的调控方法，包括以下步骤：
    S10 提供背光模块，包括：
    基板；
    多个微型发光二极管，间隔配置于所述基板上；
    聚合物网络液晶层，配置于所述多个微型发光二极管上方；以及
    光学功能层，配置于所述聚合物网络液晶层上方。
  8. 根据权利要求7所述的背光模块透光率的调控方法，其中所述方法更包括：
    S20a 对所述聚合物网络液晶层进行雾化处理，包括：提供驱动电压给所述聚合物网络液晶层，并且利用UV照射所述聚合物网络液晶层使所述聚合物网络液晶层固化并具有雾化结构。
  9. 根据权利要求7所述的背光模块透光率的调控方法，其中所述方法更包括：
    S20b 对所述聚合物网络液晶层进行图案化，使所述聚合物网络液晶层具有至少一图案化表面，其中所述至少一图案化表面的图案的截距对应所述多个微型发光二极管的截距，所述图案对应遮蔽所述多个微型发光二极管并且露出多个微型发光二极管以外的区域。
  10. 根据权利要求7所述的背光模块透光率的调控方法，其中在步骤S10中，所述背光模块更包括：多个透明电极配置于所述聚合物网络液晶层的上下两侧。
  11. 根据权利要求10所述的背光模块透光率的调控方法，其中所述方法更包括：
    S20c 藉由所述多个透明电极将所述聚合物网络液晶层分成多个区块，提供不同电压给所述多个透明电极，以连续调整所述多个区块的各自的透光率。
  12. 根据权利要求7所述的背光模块透光率的调控方法，其中在步骤S10中，所述聚合物网络液晶层包括多个液晶空盒分别对应至所述多个微型发光二极管以外的区域，使对应至所述多个微型发光二极管的所述聚合物网络液晶具有第一厚度，对应至所述多个微型发光二极管以外的区域的所述聚合物网络液晶具有第二厚度，所述第一厚度大于所述第二厚度。
  13. 根据权利要求12所述的背光模块透光率的调控方法，其中在步骤S10中，藉由具有所述第一厚度的所述聚合物网络液晶提高所述多个微型发光二极管的遮蔽性以降低透光率，以及藉由具有所述第二厚度的所述聚合物网络液晶降低对所述多个微型发光二极管以外的区域的遮蔽性以提高透光率。
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