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WO2019000783A1 - 一种led、背光模组及液晶显示装置 - Google Patents

一种led、背光模组及液晶显示装置 Download PDF

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Publication number
WO2019000783A1
WO2019000783A1 PCT/CN2017/110183 CN2017110183W WO2019000783A1 WO 2019000783 A1 WO2019000783 A1 WO 2019000783A1 CN 2017110183 W CN2017110183 W CN 2017110183W WO 2019000783 A1 WO2019000783 A1 WO 2019000783A1
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Prior art keywords
quantum
particles
layer
quantum particles
blue
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French (fr)
Inventor
邓天应
强科文
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Shenzhen TCL New Technology Co Ltd
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Shenzhen TCL New Technology Co Ltd
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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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/851—Wavelength conversion means
    • H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
    • H10H20/8512—Wavelength conversion materials
    • H10H20/8513—Wavelength conversion materials having two or more wavelength conversion materials

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to an LED, a backlight module, and a liquid crystal display device.
  • Applying quantum dot particles to the backlight module can make the liquid crystal display device have high color gamut and high brightness, and the color reproduction degree is higher.
  • quantum dot microparticles there are two main ways to apply quantum dot microparticles to a backlight module to achieve high color gamut.
  • One is to make quantum dot microparticles into quantum dot optical films, and the other is to make quantum dot microparticles into quantum dot tubes, and then The quantum dot film or quantum dot tube is placed in the backlight module.
  • the two implementations have complicated processes and low light conversion efficiency, and because these two methods require a large number of quantum dot particles, the production cost is high, and it is difficult to achieve large-scale industrialization.
  • the main object of the present invention is to provide an LED, a backlight module and a liquid crystal display device, which aim to simplify the implementation of the backlight module to achieve a high color gamut and reduce the cost.
  • an LED proposed by the present invention includes:
  • a light emitting chip located in a cavity of the bracket, and mounted on a bottom wall of the bracket, the light emitting chip emitting light having a shorter wavelength than blue light;
  • the light conversion layer encapsulated in a cavity of the holder, the light conversion layer comprising quantum particles and an encapsulant layer, the quantum particles including red quantum particles, green quantum particles and blue quantum particles, the encapsulation layer wrapped The red quantum particles, the green quantum particles, and the blue quantum particles are disposed.
  • each of the quantum particles has a chemical bond barrier layer on the outside, and the encapsulant layer is a silicone-based encapsulant; or
  • Each of the quantum particles has no chemical bond barrier layer outside, and the encapsulant layer is a water oxygen barrier encapsulant, and the water oxygen barrier encapsulant encapsulates the quantum particles to form a water oxygen barrier layer.
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in the up and down direction to form a red quantum layer, a green quantum layer, and a blue quantum layer; or
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in an up and down direction to form a single quantum layer and a mixed quantum layer, the single quantum layer being composed of the red quantum particles, One of the green quantum particles and the blue quantum particles, the mixed quantum layer being composed of the remaining two of the red quantum particles, the green quantum particles, and the blue quantum particles.
  • the distance between the red quantum layer, the green quantum layer and the blue quantum layer and the light emitting chip is set from near to far.
  • the light-emitting chip is a high-energy light source light-emitting chip whose wavelength is smaller than blue light and whose light energy is stronger than blue light.
  • the mass ratio of the red quantum particles, the green quantum particles and the blue quantum particles is 1:2:1 to 1:4:3.
  • the quantum particles are quantum dots and quantum rods.
  • the invention also provides a backlight module, the backlight module comprising an LED, the LED comprising:
  • a light emitting chip located in a cavity of the bracket, and mounted on a bottom wall of the bracket, the light emitting chip emitting light having a shorter wavelength than blue light;
  • the light conversion layer encapsulated in a cavity of the holder, the light conversion layer comprising quantum particles and an encapsulant layer, the quantum particles including red quantum particles, green quantum particles and blue quantum particles, the encapsulation layer wrapped The red quantum particles, the green quantum particles, and the blue quantum particles are disposed.
  • each of the quantum particles has a chemical bond barrier layer on the outside, and the encapsulant layer is a silicone-based encapsulant; or
  • Each of the quantum particles has no chemical bond barrier layer outside, and the encapsulant layer is a water oxygen barrier encapsulant, and the water oxygen barrier encapsulant encapsulates the quantum particles to form a water oxygen barrier layer.
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in the up and down direction to form a red quantum layer, a green quantum layer, and a blue quantum layer; or
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in an up and down direction to form a single quantum layer and a mixed quantum layer, the single quantum layer being composed of the red quantum particles, One of the green quantum particles and the blue quantum particles, the mixed quantum layer being composed of the remaining two of the red quantum particles, the green quantum particles, and the blue quantum particles.
  • the distance between the red quantum layer, the green quantum layer and the blue quantum layer and the light emitting chip is set from near to far.
  • the present invention also provides a liquid crystal display device, the liquid crystal display device includes a backlight module, and the backlight module includes an LED, and the LED includes:
  • a light emitting chip located in a cavity of the bracket, and mounted on a bottom wall of the bracket, the light emitting chip emitting light having a shorter wavelength than blue light;
  • the light conversion layer encapsulated in a cavity of the holder, the light conversion layer comprising quantum particles and an encapsulant layer, the quantum particles including red quantum particles, green quantum particles and blue quantum particles, the encapsulation layer wrapped The red quantum particles, the green quantum particles, and the blue quantum particles are disposed.
  • each of the quantum particles has a chemical bond barrier layer on the outside, and the encapsulant layer is a silicone-based encapsulant; or
  • Each of the quantum particles has no chemical bond barrier layer outside, and the encapsulant layer is a water oxygen barrier encapsulant, and the water oxygen barrier encapsulant encapsulates the quantum particles to form a water oxygen barrier layer.
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in the up and down direction to form a red quantum layer, a green quantum layer, and a blue quantum layer; or
  • the red quantum particles, the green quantum particles, and the blue quantum particles are layered in an up and down direction to form a single quantum layer and a mixed quantum layer, the single quantum layer being composed of the red quantum particles, One of the green quantum particles and the blue quantum particles, the mixed quantum layer being composed of the remaining two of the red quantum particles, the green quantum particles, and the blue quantum particles.
  • the distance between the red quantum layer, the green quantum layer and the blue quantum layer and the light emitting chip is set from near to far.
  • the light-emitting chip is a high-energy light source light-emitting chip whose wavelength is smaller than blue light and whose light energy is stronger than blue light.
  • the mass ratio of the red quantum particles, the green quantum particles and the blue quantum particles is 1:2:1 to 1:4:3.
  • the quantum particles are quantum dots and quantum rods.
  • the light-emitting chip and the red quantum particles, the green quantum particles and the blue quantum particles are encapsulated inside the LED, wherein the light emitted by the light-emitting chip has a shorter wavelength than the blue light wavelength, and the light emitted by the light-emitting chip excites red,
  • the green and blue three-color quantum particles enable the backlight module and the liquid crystal display device including the LED to achieve a high color gamut effect, and also improve the light conversion efficiency of the quantum particles.
  • FIG. 1 is a schematic structural view of an embodiment of an LED provided by the present invention.
  • Figure 2 is a partial enlarged view of a portion A in Figure 1;
  • FIG. 3 is a schematic structural view of another embodiment of an LED provided by the present invention.
  • Label name Label name 100 led 5 Blue quantum particles 1 support 6 Encapsulation layer 2 Light emitting chip 7 Chemical bond barrier 3 Red quantum particles 8 Gold Line 4 Green quantum particles
  • the directional indication is only used to explain in a certain posture (as shown in the figure).
  • first”, “second”, etc. in the embodiments of the present invention, the description of the "first”, “second”, etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” and “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • the present invention provides an LED, a backlight module and a liquid crystal display device, which realize a high color gamut of the liquid crystal display device.
  • the present invention provides a liquid crystal display device including a backlight module, the backlight module including an LED, as shown in FIGS. 1 to 3, the LED 100 includes a holder 1, a light-emitting chip 2, and a light conversion layer, wherein the holder 1 has a cavity open upward; the light-emitting chip 2 is located in the cavity of the holder 1, and is mounted on the bottom wall of the holder 1, and the light emitted by the light-emitting chip 2 The wavelength is shorter than the blue light; the light conversion layer is encapsulated in a cavity of the stent 1, the light conversion layer comprising quantum particles and an encapsulant layer 6, the quantum particles including red quantum particles 3, green quantum particles 4, and blue quantum The particles 5, the encapsulant layer 6 is wrapped around the red quantum particles 3, the green quantum particles 4, and the blue quantum particles 5.
  • the light-emitting chip 2 By encapsulating the light-emitting chip 2 with the red quantum particles 3, the green quantum particles 4, and the blue quantum particles 5 in the LED 100 inside, wherein the light-emitting chip 2 emits light having a wavelength shorter than the wavelength of the blue light, and the light emitted by the light-emitting chip 2 excites the red, green and blue quantum particles, so that the LED is provided
  • the backlight module of 100 and the liquid crystal display device have a high color gamut effect, and also improve the light conversion efficiency of the quantum particles.
  • the outer side of the quantum particles is provided with a water-oxygen barrier layer.
  • a water-oxygen barrier layer As shown in FIG. 2, each of the quantum particles has a chemical bond barrier layer 7 on the outside thereof, and the encapsulant layer 6 is a silicone-based encapsulant and has high temperature resistance characteristics; or as shown in FIG.
  • Each of the quantum particles does not have a chemical bond barrier layer 7 on the outside, and the encapsulant layer 6 is a water-oxygen barrier encapsulant having high temperature resistance and water-blocking properties, and the water-oxygen barrier encapsulant encapsulates the quantum particles to form Water oxygen barrier layer.
  • Both of the above methods can effectively separate the quantum particles from the water and oxygen in the environment, and prevent the quantum particles from failing due to long-term contact with water and oxygen.
  • the following examples all have a chemical bond barrier layer 7 on the outer side of each of the quantum particles.
  • the encapsulant layer 6 is an example of a silicone encapsulant.
  • the red, green, and blue color quantum particles are excited by the light emitted from the light-emitting chip 2, and various embodiments can be realized.
  • the red quantum particles 3, the green quantum particles 4, and the blue quantum particles 5 are in the up and down direction. Layered to form the red quantum layer, the green quantum layer, and the blue quantum layer, wherein a distance between the red quantum layer, the green quantum layer, and the blue quantum layer and the violet chip is Close to far setting, thus greatly improving the LED 100 NTSC gamut values and light conversion efficiency.
  • the red, green, and blue color quantum particles may be uniformly mixed and packaged on the bottom wall of the stent 1 to form a mixed quantum layer (not shown), specifically, the red quantum particles 3, green.
  • the quantum particles 4 and the blue quantum particles 5 are uniformly mixed and packaged on the holder 1, at this time, the LED
  • the NTSC color gamut value of 100 is 90% to 105%, and the light conversion efficiency is 80% to 90%.
  • the red, green and blue quantum particles are layered and packaged in the LED
  • the NTSC color gamut value of 100 is increased by 10% to 20% compared with the uniform application of the three-color quantum particles, and the light conversion efficiency of the quantum particles is increased by 5% to 20%.
  • the wavelength of blue light is 492-455 nm
  • the wavelength of green light is 577-492 nm
  • the wavelength of red light is 770-622.
  • Nm in order to increase, while long-wave light has absorption characteristics for short-wave light, and the red, green, and blue quantum particles are gradually moved away from the light-emitting chip 2, thereby avoiding the absorption of short-wave light by long-wave light and making the light conversion efficiency of the quantum particles The light conversion efficiency of each color quantum particle is greatly improved, thereby obtaining a white light source with high brightness and high color gamut.
  • the red quantum particles 3, the green quantum particles 4, and the blue quantum particles 5 may be layered in the up and down direction to form a single quantum layer and a mixed quantum layer (not shown), the single quantum layer It is composed of one of red quantum particles 3, green quantum particles 4, and blue quantum particles 5 composed of the remaining two of red quantum particles 3, green quantum particles 4, and blue quantum particles 5.
  • the single quantum layer is composed of red quantum particles 3 composed of green quantum particles 4 and blue quantum particles 5, wherein the single quantum layer and the mixed quantum layer and the light emitting chip 2
  • the distance is set from near to far, at this time, LED The NTSC color gamut value of 100 is 110% or more, and the quantum conversion efficiency of the quantum particles is 93% or more; or the single quantum layer is composed of blue quantum particles 5 composed of red quantum particles 3 and green
  • the quantum particles 4 are composed, wherein the distance between the single quantum layer and the mixed quantum layer and the light-emitting chip 2 is set from far to near, at this time, the LED The NTSC color gamut value of 100 is 110% or more, and the light conversion efficiency of the quantum fine particles is 95% or more.
  • the light emitted by the light-emitting chip 2 is purple light (that is, the light-emitting chip 2 is a violet light chip), and the red quantum particles 3 are used in order to match the light emitted by the light-emitting chip 2 with the light emitted by the light-emitting chip 2.
  • the mass ratio of the green quantum particles 4 to the blue quantum particles 5 is 1:3:2 to 1:4:3, and the LEDs obtained by combining the quantum particles and the violet chip 2 are excited by red light.
  • the green and blue three-color quantum particles have an NTSC color gamut value of more than 105%, and the light conversion efficiency of the quantum particles after excitation is over 95%.
  • the light emitted by the light-emitting chip 2 may also be ultraviolet light (ie, the light-emitting chip 2 is an ultraviolet light chip), as long as the wavelength thereof is shorter than the blue light.
  • the quantum particles are packaged on the support 1 together with the light-emitting chip 2 by an encapsulant, wherein the LED
  • the 100 further includes a gold wire 7.
  • the LED 100 can be applied to a direct-type backlight module, and can also be applied to a side-entry backlight module. .

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Physics & Mathematics (AREA)
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  • Led Device Packages (AREA)
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Abstract

一种LED、背光模组及液晶显示装置，LED（100）包括支架（1）、发光芯片（2）和光转换层，其中，支架具有朝上开口的腔体，发光芯片位于支架的腔体内，且安装在支架的底壁，发光芯片发出的光的波长短于蓝光，光转换层封装于支架的腔体内，光转换层包括量子微粒和封装胶层（6），量子微粒包括红色量子微粒（3）、绿色量子微粒（4）和蓝色量子微粒（5），封装胶层包裹红色量子微粒、绿色量子微粒和蓝色量子微粒设置。通过波长短于蓝光的光激发红、绿、蓝三色量子微粒，使含有该LED的背光模组及液晶显示装置达到高色域的效果，同时也提高了量子微粒的光转换效率。

Description

一种LED、背光模组及液晶显示装置
技术领域
本发明涉及液晶显示技术领域，特别涉及一种LED、背光模组及液晶显示装置。
背景技术
将量子点微粒应用到背光模组中，可以使液晶显示装置具有高色域、高亮度的特点，色彩还原度更高。目前将量子点微粒应用到背光模组中实现高色域的方式主要有两种，一种是将量子点微粒制成量子点光学膜，一种是将量子点微粒制成量子点管，然后将该量子点膜或量子点管置于背光模组中。但是这两种实现方式的工艺复杂、光转换效率低，而且由于这两种方式需要使用大量的量子点微粒，导致生产成本也较高，难以实现大规模产业化。
发明内容
本发明的主要目的是提出一种LED、背光模组及液晶显示装置，旨在简化背光模组达到高色域的实现方式，降低成本。
为实现上述目的，本发明提出的一种LED，包括：
支架，具有朝上开口的腔体；
发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
优选地，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
优选地，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
优选地，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。
优选地，所述发光芯片为波长比蓝光小，光能量比蓝光强的高能光源发光芯片。
优选地，所述红色量子微粒、所述绿色量子微粒与所述蓝色量子微粒的质量比为1:2:1~1:4:3。
优选地，所述量子微粒为量子点和量子棒。
优选地，所述量子微粒为CsPbX3（X=Cl，Br，I）、CdSe、CdTe、MgS、MgSe、MgTe、CaS、CaSe、CaTe、SrS、SrSe、SrTe、BaS、BaSe、BaTe、ZnS、ZnSe、ZnTe 、CdS、GaN、GaP、GaAs、InN、InP和InAs中的至少一种。
本发明还提出一种背光模组，所述背光模组包括LED，该LED包括：
支架，具有朝上开口的腔体；
发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
优选地，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
优选地，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
优选地，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。
本发明还提出一种液晶显示装置，所述液晶显示装置包括背光模组，所述背光模组包括LED，该LED包括：
支架，具有朝上开口的腔体；
发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
优选地，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
优选地，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
优选地，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。优选地，所述发光芯片为波长比蓝光小，光能量比蓝光强的高能光源发光芯片。
优选地，所述红色量子微粒、所述绿色量子微粒与所述蓝色量子微粒的质量比为1:2:1~1:4:3。
优选地，所述量子微粒为量子点和量子棒。
优选地，所述量子微粒为CsPbX3（X=Cl，Br，I）、CdSe、CdTe、MgS、MgSe、MgTe、CaS、CaSe、CaTe、SrS、SrSe、SrTe、BaS、BaSe、BaTe、ZnS、ZnSe、ZnTe 、CdS、GaN、GaP、GaAs、InN、InP和InAs中的至少一种。
本发明技术方案中，将发光芯片与红色量子微粒、绿色量子微粒和蓝色量子微粒封装于LED内部，其中，发光芯片发出的光的波长短于蓝光波长，通过发光芯片发出的光激发红、绿、蓝三色量子微粒，使含有该LED的背光模组及液晶显示装置达到高色域的效果，同时也提高了量子微粒的光转换效率。
附图说明
为了更清楚地说明本发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地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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示出的结构获得其他的附图。
图1为本发明提供的LED的一实施例的结构示意图；
图2为图1中A处的局部放大图；
图3为本发明提供的LED的另一实施例的结构示意图。
附图标号说明：
标号 名称 标号 名称
100 LED 5 蓝色量子微粒
1 支架 6 封装胶层
2 发光芯片 7 化学键阻隔层
3 红色量子微粒 8 金线
4 绿色量子微粒
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
目前将量子点微粒应用到背光模组中实现高色域的方式主要有两种，一种是将量子点微粒制成量子点光学膜，一种是将量子点微粒制成量子点管，将该量子点膜或量子点管置于背光模组中。但是这两种实现方式的工艺复杂、光转换效率低，而且成本也较高。为简化工艺并降低成本，本发明提出一种LED、背光模组及液晶显示装置，实现液晶显示装置的高色域。
本发明提出一种液晶显示装置，该液晶显示装置包括背光模组，该背光模组包括LED，如图1至图3所示，该LED 100包括支架1、发光芯片2和光转换层，其中，支架1具有朝上开口的腔体；发光芯片2位于支架1的腔体内，且安装在支架1的底壁，发光芯片2发出的光的波长短于蓝光；所述光转换层封装于支架1的腔体内，所述光转换层包括量子微粒和封装胶层6，所述量子微粒包括红色量子微粒3、绿色量子微粒4和蓝色量子微粒5，所述封装胶层6包裹所述红色量子微粒3、绿色量子微粒4和蓝色量子微粒5设置。
通过将发光芯片2与红色量子微粒3、绿色量子微粒4和蓝色量子微粒5封装于LED 100内部，其中，发光芯片2发出波长短于蓝光波长的光，通过发光芯片2发出的光激发红、绿、蓝三色量子微粒，使设置有LED 100的背光模组及液晶显示装置具有高色域的效果，同时也提高了量子微粒的光转换效率。
由于量子微粒对水、氧敏感，长期与环境中的水、氧接触会导致量子微粒失效，因此，在本发明实施例中，所述量子微粒外侧均设有水氧阻隔层。具体地，如图1 和图2所示，每一所述量子微粒外侧具有化学键阻隔层7，此时封装胶层6为有机硅类封装胶，且具有耐高温特性；或者如图3所示，
每一所述量子微粒外侧不具有化学键阻隔层7，则封装胶层6为水氧阻隔封装胶，具有耐高温和阻隔水氧的特性，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。以上两种方式均可以有效的将量子微粒与环境中的水、氧隔离，避免量子微粒因长期接触水、氧而失效，以下实施例内容均以每一所述量子微粒外侧具有化学键阻隔层7，封装胶层6为有机硅类封装胶为例。
通过发光芯片2发出的光激发红、绿、蓝三色量子微粒，可以有多种实现方式，如图1所示，红色量子微粒3、绿色量子微粒4和蓝色量子微粒5在上下方向上分层设置，以形成所述红色量子层、绿色量子层和蓝色量子层，其中，所述红色量子层、所述绿色量子层和所述蓝色量子层与所述紫光芯片的距离呈由近到远设置，从而大幅度的提升LED 100的NTSC色域值和光转换效率。当然，也可以将红、绿、蓝三色量子微粒的均匀混合后封装于支架1的底壁上，以形成混合量子层（图中未示出），具体地，将红色量子微粒3、绿色量子微粒4和蓝色量子微粒5均匀混合后封装于支架1上，此时，LED 100的NTSC色域值为90%~105%，光转换效率为80%~90%。其中，将红、绿、蓝三色量子微粒分层设置封装的LED 100的NTSC色域值相对于三色量子微粒混合均匀的应用提升10%~20%，量子微粒受激发的光转换效率提升5%~20%。
一般来说，蓝光的波长为492-455 nm，绿光的波长为577-492 nm，红光的波长为为770-622 nm，呈依次递增，而长波光对短波光具有吸收的特性，将红、绿、蓝量子微粒设置为逐渐远离发光芯片2，则可以避免长波光对短波光的吸收使得量子微粒的光转换效率降低，大幅度提升各色量子微粒的光转换效率，从而得到高亮度、高色域的白光光源。
此外，也可以将红色量子微粒3、绿色量子微粒4和蓝色量子微粒5在上下方向上分层设置，以形成单一量子层和混合量子层（图中未示出），所述单一量子层由红色量子微粒3、绿色量子微粒4和蓝色量子微粒5中的一种组成，所述混合量子层由红色量子微粒3、绿色量子微粒4和蓝色量子微粒5中剩余的两种组成。具体地，所述单一量子层由红色量子微粒3组成，所述混合量子层由绿色量子微粒4和蓝色量子微粒5组成，其中，所述单一量子层和所述混合量子层与发光芯片2的距离呈由近到远设置，此时，LED 100的NTSC色域值为110%以上，量子微粒受激发的光转换效率为93%以上；或者所述单一量子层由蓝色量子微粒5组成，所述混合量子层由红色量子微粒3和绿色量子微粒4组成，其中，所述单一量子层和所述混合量子层与发光芯片2的距离呈由远到近设置，此时，LED 100的NTSC色域值为110%以上，量子微粒受激发的光转换效率为95%以上。
为了使所述量子微粒与发光芯片2发出的光配合得到高色域的白光，在本发明实施例中，发光芯片2发出的光为紫光（即发光芯片2为紫光芯片），红色量子微粒3、绿色量子微粒4与蓝色量子微粒5的质量比为1:3:2~1:4:3，以此配比组合的量子微粒与紫光芯片2配合封装得到的LED，通过紫光激发红、绿、蓝三色量子微粒，其NTSC色域值达到105%以上，量子微粒受激发后的光转换效率达到95%以上。在本发明其他实施例中，由发光芯片2发出的光也可以为紫外光（即发光芯片2为紫外光芯片），只要其波长短于蓝光即可满足要求。
其中，所述量子微粒为量子点或者量子棒（本实施例均以量子点为例），所述量子点或量子棒为CsPbX3（X=Cl，Br，I）、CdSe、CdTe、MgS、MgSe、MgTe、CaS、CaSe、CaTe、SrS、SrSe、SrTe、BaS、BaSe、BaTe、ZnS、ZnSe、ZnTe 、CdS、GaN、GaP、GaAs、InN、InP和InAs中的至少一种。所述量子微粒与发光芯片2一起通过封装胶封装于支架1上，其中，LED 100还包括金线7，金线7的一端与支架1连接，另一端与发光芯片2连接，封装后LED 100可应用于直下式背光模组中，也可应用于侧入式背光模组中。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (20)

  1. 一种LED，其特征在于，包括：
    支架，具有朝上开口的腔体；
    发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
    光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
  2. 如权利要求1所述的LED，其特征在于，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
    每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
  3. 如权利要求1所述的LED，其特征在于，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
    所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
  4. 如权利要求3所述的LED，其特征在于，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。
  5. 如权利要求1所述的LED，其特征在于，所述发光芯片为波长比蓝光小，光能量比蓝光强的高能光源发光芯片。
  6. 如权利要求1所述的LED，其特征在于，所述红色量子微粒、所述绿色量子微粒与所述蓝色量子微粒的质量比为1:2:1~1:4:3。
  7. 如权利要求1所述的LED，其特征在在于，所述量子微粒为量子点和量子棒。
  8. 如权利要求1所述的LED，其特征在于，所述量子微粒为CsPbX3（X=Cl，Br，I）、CdSe、CdTe、MgS、MgSe、MgTe、CaS、CaSe、CaTe、SrS、SrSe、SrTe、BaS、BaSe、BaTe、ZnS、ZnSe、ZnTe 、CdS、GaN、GaP、GaAs、InN、InP和InAs中的至少一种。
  9. 一种背光模组，其特征在于，包括LED，所述LED包括：
    支架，具有朝上开口的腔体；
    发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
    光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
  10. 如权利要求9所述的背光模组，其特征在于，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
    每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
  11. 如权利要求9所述的背光模组，其特征在于，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
    所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
  12. 如权利要求11所述的背光模组，其特征在于，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。
  13. 一种液晶显示装置，其特征在于，包括背光模组，所述背光模组包括LED，所述LED包括：
    支架，具有朝上开口的腔体；
    发光芯片，位于所述支架的腔体内，且安装在所述支架的底壁，所述发光芯片发出的光的波长短于蓝光；以及，
    光转换层，封装于所述支架的腔体内，所述光转换层包括量子微粒和封装胶层，所述量子微粒包括红色量子微粒、绿色量子微粒和蓝色量子微粒，所述封装胶层包裹所述红色量子微粒、绿色量子微粒和蓝色量子微粒设置。
  14. 如权利要求13所述的液晶显示装置，其特征在于，每一所述量子微粒外侧具有化学键阻隔层，所述封装胶层为有机硅类封装胶；或，
    每一所述量子微粒外侧不具有化学键阻隔层，所述封装胶层为水氧阻隔封装胶，所述水氧阻隔封装胶包裹所述量子微粒以形成水氧阻隔层。
  15. 如权利要求13所述的液晶显示装置，其特征在于，所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成红色量子层、绿色量子层和蓝色量子层；或，
    所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒在上下方向上分层设置，以形成单一量子层和混合量子层，所述单一量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中的一种组成，所述混合量子层由所述红色量子微粒、所述绿色量子微粒和所述蓝色量子微粒中剩余的两种组成。
  16. 如权利要求15所述的液晶显示装置，其特征在于，所述红色量子层、绿色量子层和蓝色量子层与所述发光芯片的距离呈由近到远设置。
  17. 如权利要求13所述的液晶显示装置，其特征在于，所述发光芯片为波长比蓝光小，光能量比蓝光强的高能光源发光芯片。
  18. 如权利要求13所述的液晶显示装置，其特征在于，所述红色量子微粒、所述绿色量子微粒与所述蓝色量子微粒的质量比为1:2:1~1:4:3。
  19. 如权利要求13所述的液晶显示装置，其特征在在于，所述量子微粒为量子点和量子棒。
  20. 如权利要求13所述的液晶显示装置，其特征在于，所述量子微粒为CsPbX3（X=Cl，Br，I）、CdSe、CdTe、MgS、MgSe、MgTe、CaS、CaSe、CaTe、SrS、SrSe、SrTe、BaS、BaSe、BaTe、ZnS、ZnSe、ZnTe 、CdS、GaN、GaP、GaAs、InN、InP和InAs中的至少一种。
PCT/CN2017/110183 2017-06-27 2017-11-09 一种led、背光模组及液晶显示装置 Ceased WO2019000783A1 (zh)

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