WO2016138693A1 - 白光led、背光模块及液晶显示装置 - Google Patents

白光led、背光模块及液晶显示装置 Download PDF

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WO2016138693A1
WO2016138693A1 PCT/CN2015/077833 CN2015077833W WO2016138693A1 WO 2016138693 A1 WO2016138693 A1 WO 2016138693A1 CN 2015077833 W CN2015077833 W CN 2015077833W WO 2016138693 A1 WO2016138693 A1 WO 2016138693A1
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quantum dot
light
led chip
dot structure
transparent
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French (fr)
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贺虎
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/888,644 priority Critical patent/US9893252B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • H10H20/855—Optical field-shaping means, e.g. lenses
    • H10H20/856—Reflecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/02—Cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/04—Provision of filling media
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • 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
    • H10H20/8515—Wavelength conversion means not being in contact with the bodies
    • 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
    • H10H20/852—Encapsulations
    • H10H20/853—Encapsulations characterised by their shape
    • 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
    • H10H20/852—Encapsulations
    • H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the invention relates to a white light LED, a backlight module and a liquid crystal display device.
  • a white light emitting diode In the conventional liquid crystal display device, a white light emitting diode (LED) is generally used as a backlight source, and a backlight of the liquid crystal display panel is realized by a reasonable combination of the light guide plate and the optical film.
  • LEDs with red, green, and blue phosphors.
  • blue LED with red and green phosphors
  • the Quantum Dot (QD) technology is a semiconductor nanomaterial structure technology in which electrons are bound to a certain range, and is composed of ultra-small compound crystals having a size of 1 to 100 nm.
  • quantum dot technology crystals of different sizes can be used to control the wavelength of light, thereby precisely controlling the color of light. Therefore, the quantum dot material is applied to a backlight module, and a high-spectrum light source (for example, a blue LED) is used instead of the conventional white LED light source.
  • the quantum dot is irradiated with a small-frequency blue light source and can be excited to generate light of different wavelengths.
  • the size of the quantum dot material the color of the synthesized light can be adjusted to meet the backlight requirements of the liquid crystal display device of high color gamut.
  • a blue light emitting diode (LED) 11 is disposed on a light incident side of the light guide plate 12
  • a quantum dot phosphor film 13 is disposed on a light emitting surface of the light guide plate 12 , wherein the light emitted by the blue LED 11 passes through the light guide plate 12 . It is converted into a surface light source, and is emitted from the light-emitting surface of the light guide plate 12 through the quantum dot phosphor film 13, thereby converting blue light into a backlight required for the liquid crystal display device.
  • a large-area quantum dot phosphor film 13 is required, which requires a large number of quantum dot materials, and the uniformity of coating of the quantum dot phosphor layer is high, resulting in high cost. .
  • the quantum dot phosphor film 13 is in use, if the optical film structure is different or the optical film type is different, the optical film is improved.
  • the chromaticity and brightness thereof are greatly different, so the structure of the optical film, the supplier of the optical film or the supplier of the optical film cannot be easily changed during the use of the quantum dot phosphor film 13
  • the type of optical diaphragm which greatly limits the flexibility and versatility of quantum dot phosphor optical film use.
  • a blue light emitting diode (LED) 21 is disposed on the light incident side of the light guide plate 22, and the quantum dot phosphor is encapsulated in a glass tube to form a quantum dot phosphor glass tube 23, wherein the quantum dot phosphor glass tube 23 is disposed.
  • LED blue light emitting diode
  • the quantum dot phosphor is encapsulated in a glass tube to form a quantum dot phosphor glass tube 23, wherein the quantum dot phosphor glass tube 23 is disposed.
  • the blue light emitted from the blue LED 21 is irradiated onto the light incident side of the light guide plate 22 through the quantum dot phosphor glass tube 23.
  • the quantum dot phosphor glass tube 23 is complicated to manufacture and costly, and the quantum dot phosphor glass tube 23 is easily broken.
  • an object of the present invention is to provide a white LED comprising a susceptor, at least one monochromatic light LED chip on the pedestal, on the pedestal and surrounding the a reflective cup of the monochromatic light LED chip, an encapsulant filled in the reflective cup to seal the monochromatic optical LED chip, and a first quantum dot structure and a second quantum dot structure encapsulated in the encapsulant a body, wherein light generated by the monochromatic light LED chip, light generated by exciting the first quantum dot structure, and light generated by exciting the second quantum dot structure are mixed to form white light
  • the monochromatic light LED chip is a blue LED chip.
  • the first quantum dot structure comprises a first transparent shell and a red quantum dot phosphor, and the first transparent shell encloses the red quantum dot phosphor.
  • the first transparent casing is made of a transparent glass material.
  • the second quantum dot structure comprises a second transparent shell and a green quantum dot phosphor, and the second transparent shell encloses the green quantum dot phosphor.
  • the second transparent casing is made of a transparent glass material.
  • the reflector cup is made of a plastic material, and a reflective coating layer is disposed on the inner wall of the reflector cup.
  • the encapsulant is made of a silicone material or an epoxy material.
  • Another object of the present invention is to provide a backlight module including at least a light guide plate having a light incident side surface, and the white light LED disposed adjacent to the light incident side.
  • Still another object of the present invention is to provide a liquid crystal display device including the above-described backlight module and a liquid crystal display panel disposed on the backlight module.
  • the invention encapsulates the quantum dot phosphor by using the glass casing, and can play the role of blocking water and oxygen, and at the same time, it is not easy to leak toxic elements in the quantum dot phosphor powder, thereby improving safety.
  • the glass casing has a small volume, is less likely to be broken than the prior art glass tube, and has a low manufacturing cost.
  • 1 is a conventional backlight module using a quantum dot phosphor film
  • 2 is another conventional backlight module using a quantum dot phosphor film
  • FIG. 3 is a schematic structural view of a liquid crystal display device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a white LED according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a liquid crystal display device according to an embodiment of the present invention.
  • a liquid crystal display device includes a liquid crystal display panel 200 and a backlight module 100 disposed opposite to the liquid crystal display panel 200 , wherein the backlight module 100 provides a display light source to the liquid crystal display panel 200 to enable liquid crystal display.
  • the panel 200 displays an image.
  • the liquid crystal display panel 200 generally includes a Thin Film Transistor (TFT) array substrate 210, a color filter (CF) substrate 220 disposed opposite to the TFT array substrate, and a TFT array substrate 210 and CF.
  • TFT Thin Film Transistor
  • CF color filter
  • the backlight module 100 includes a light guide plate 110, a white light emitting diode (LED) 120, a reflection sheet 130, a first brightness enhancement film 141 and a second brightness enhancement film 142, and a diffusion film 150. It should be understood that the number of white LEDs 120 in the present invention is not limited to the number shown in FIG.
  • the light guide plate 110 includes a light incident side surface 111 and a light exit surface 112.
  • the white LEDs 120 are disposed adjacent to the light incident side 111 of the light guide plate 110.
  • the first brightness enhancement film 141, the second brightness enhancement film 142, and the diffusion film 150 are sequentially disposed on the light exit surface 112 of the light guide plate 110, wherein the first brightness enhancement film 141 and the second brightness enhancement film 142 is used to concentrate the light emitted by the light-emitting surface 112 to increase the brightness of the light emitted by the light-emitting surface 112; the diffusion film 150 is used to enhance the light after passing through the first brightness-increasing film 141 and the second brightness-increasing film 142.
  • the upward brightness is softened by the light after the first brightness enhancement film 141 and the second brightness enhancement film 142, thereby providing a uniform surface light source to the liquid crystal display panel 200.
  • the reflective sheet 130 is disposed under the bottom surface of the light guide plate 110 for reflecting the light emitted from the bottom surface of the light guide plate 110 back into the light guide plate 110 to provide utilization of light in the light guide plate 110.
  • the backlight module 100 further includes other necessary components such as a backboard, a plastic frame, and the like, and specifically, the structure of the existing backlight module can be referred to.
  • FIG. 4 is a schematic structural view of a white LED according to an embodiment of the present invention.
  • a white LED 120 includes a susceptor 121, two monochromatic light LED chips 122, a reflector cup 123, an encapsulant 124, a first quantum dot structure 125, and a second quantum dot structure. 126. It should be understood that the number of the monochromatic light LED chips 122 in the present invention is not limited to the number shown in FIG.
  • two monochromatic light LED chips 122 are located on the susceptor 121, and two monochromatic light LED chips 122 are connected in series by gold wires (not shown).
  • the monochromatic light LED chip refers to The LED chip produces only a single color of light.
  • the illuminating cup 123 is located on the susceptor 121 and surrounds the two monochromatic LEDs 122 such that the light generated by the two monochromatic LEDs 122 is emitted toward the front surface of the two monochromatic LEDs 122, thereby increasing the light generated by the two monochromatic LEDs 122. Utilization.
  • the encapsulant 124 is filled in the reflector 123 to seal the two monochromatic LEDs 122.
  • the first quantum dot structure 125 and the second quantum dot structure 126 are both encapsulated in the encapsulant 124, wherein the light generated by the two monochromatic LEDs 122, the light generated by the first quantum dot structure 125 is excited, and The light generated after the second quantum dot structure 126 is excited is mixed to form white light.
  • the light generated after the first quantum dot structure 125 is excited refers to the light generated by the light generated by the two monochromatic light LEDs 122 exciting the quantum dot material in the first quantum dot structure 125
  • the second The light generated after the quantum dot structure 126 is excited refers to light generated by the light generated by the two monochromatic light LEDs 122 exciting the quantum dot material in the second quantum dot structure 126.
  • the monochromatic light LED 122 is preferably a blue LED, but the invention is not limited thereto.
  • the first quantum dot structure 125 includes a first transparent case 1251 and a red quantum dot phosphor 1252, wherein the first transparent case 1251 encapsulates the red quantum dot phosphor 1252.
  • the blue light generated by the blue LED 122 excites the red quantum dot phosphor 1252 to produce red light.
  • the second quantum dot structure 126 includes a first transparent housing 1261 and a green quantum dot phosphor 1262, wherein the second transparent housing 1261 encapsulates the green quantum dot phosphor 1262.
  • the blue light generated by the blue LED 122 excites the green quantum dot phosphor 1262 to produce green light.
  • the blue light generated by the blue LED 122, the red light generated by exciting the red quantum dot phosphor 1252, and the green light generated by exciting the green quantum dot phosphor 1262 form a white light.
  • the first transparent casing 1251 and the second transparent casing 1261 are both supported by transparent glass, but the invention is not limited thereto.
  • the invention is not limited thereto. In this way, by encapsulating the quantum dot phosphor by using the glass casing, the barrier effect of water and oxygen can be achieved, and at the same time, the toxic elements in the quantum dot phosphor are not easily leaked, thereby improving safety.
  • the reflector cup 123 may be made of, for example, a plastic material, but the present invention is not limited thereto, and a reflective coating layer 1231 is provided on the inner wall of the reflector cup 123.
  • the encapsulant 124 can be made, for example, of a silicone material or an epoxy material.
  • the glass casing by using the glass casing to encapsulate the quantum dot phosphor, the barrier function of water and oxygen can be achieved, and at the same time, the toxic elements in the quantum dot phosphor are not easily leaked, thereby improving safety.
  • the glass casing has a small volume and is not easily broken compared with the prior art glass tube. And the production cost is low.

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Abstract

一种白光LED，其包括基座、至少一位于所述基座上的单色光LED芯片、位于所述基座上且环绕所述单色光LED芯片的反光杯、填充于所述反光杯中以密封所述单色光LED芯片的封装胶以及被封装于所述封装胶中的第一量子点结构体和第二量子点结构体，所述单色光LED芯片产生的光、激发所述第一量子点结构体产生的光以及激发所述第二量子点结构体产生的光混合形成白光。一种具有该白光LED的背光模块及具有该背光模块的液晶显示装置。通过利用玻璃壳体封装量子点荧光粉，由于玻璃壳体的体积较小，与现有技术的玻璃管相比，不易破碎，且制作成本低。

Description

白光LED、背光模块及液晶显示装置 技术领域
本发明涉及一种白光LED、背光模块及液晶显示装置。
背景技术
在现有的液晶显示装置中，通常采用白光发光二极管(Light Emitting Diode，简称LED)作为背光光源，通过导光板和光学膜片的合理搭配实现液晶显示面板所需的背光。随着人们对高色域、高色彩饱和度、节能的要求越来越高，目前背光中实现白光光源、高色域、高色彩饱和度的方案有：利用紫外LED配合红绿蓝荧光粉实现；利用蓝光LED配合红绿荧光粉实现；利用蓝光LED加绿光LED加红光LED实现等。这些方案都可以提高色域，但是实施起来较为困难，并且成本较高。
量子点(Quantum Dot，简称QD)技术，是把电子束缚在一定范围内的半导体纳米材料结构技术，其由尺寸大小在1～100nm的超小化合物结晶体构成。在量子点技术中，可利用不同尺寸大小的结晶体控制光的波长，进而精确控制光的颜色。因此，量子点材料被应用于背光模块中，采用高频谱光源(例如蓝光LED)取代传统白光LED光源，量子点在高频蓝光光源的照射小，可被激发产生不同波长的光。通过调整量子点材料的尺寸大小，即可调节合成光的颜色，从而满足高色域的液晶显示装置的背光要求。
图1是一种现有的采用量子点荧光粉膜片的背光模块。参照图1，将蓝光发光二极管(LED)11设置在导光板12的入光侧面，量子点荧光粉膜片13设置在导光板12的出光面上，其中，蓝光LED11发出的光经导光板12转换成面光源，并由导光板12的出光面出射经过量子点荧光粉膜片13，从而将蓝光转换成液晶显示装置所需的背光。但是，由于在大尺寸液晶显示装置中，需要大面积制作量子点荧光粉膜片13，这样需要的量子点材料较多，且量子点荧光粉层涂布的均匀性要求高，导致成本很高。另外，由于量子点荧光粉膜片13在使用中，如果光学膜片架构不同或光学膜片型号不同，则经光学膜片改善后 的光透过液晶显示面板后，其色度和亮度会有很大差异，所以在量子点荧光粉膜片13的使用过程中不能轻易的改变光学膜片的架构、光学膜片的供应商或光学膜片的型号，这大大限制了量子点荧光粉光学膜片使用的灵活性和普遍性。
图2是另一种现有的采用量子点荧光粉膜片的背光模块。参照图2，将蓝光发光二极管(LED)21设置在导光板22的入光侧面，量子点荧光粉被封装在玻璃管内形成量子点荧光粉玻璃管23，其中，量子点荧光粉玻璃管23设置在蓝光LED21与导光板22的入光侧面之间。蓝光LED21发出的蓝光经过量子点荧光粉玻璃管23照射到导光板22的入光侧面上。但是，采用这种方式时，量子点荧光粉玻璃管23制作复杂、成本较高，并且量子点荧光粉玻璃管23易于破碎。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种白光LED，包括基座、至少一位于所述基座上的单色光LED芯片、位于所述基座上且环绕所述单色光LED芯片的反光杯、填充于所述反光杯中以密封所述单色光LED芯片的封装胶以及被封装于所述封装胶中的第一量子点结构体和第二量子点结构体，其中，所述单色光LED芯片产生的光、激发所述第一量子点结构体产生的光以及激发所述第二量子点结构体产生的光混合形成白光
进一步地，所述单色光LED芯片为蓝光LED芯片。
进一步地，所述第一量子点结构体包括第一透明壳体及红色量子点荧光粉，所述第一透明壳体包裹所述红色量子点荧光粉。
进一步地，所述第一透明壳体由透明玻璃材料制成。
进一步地，所述第二量子点结构体包括第二透明壳体及绿色量子点荧光粉，所述第二透明壳体包裹所述绿色量子点荧光粉。
进一步地，所述第二透明壳体由透明玻璃材料制成。
进一步地，所述反光杯由塑胶材料制成，所述反光杯的内壁上设有反光镀膜层。
进一步地，述封装胶由硅胶材料或环氧树脂材料制成。
本发明的另一目的还在于提供一种背光模块，至少包括：导光板，具有入光侧面；上述的白光LED，邻近于所述入光侧面设置。
本发明的又一目的又在于提供一种液晶显示装置，包括上述的背光模块及设置在所述背光模块之上的液晶显示面板。
本发明通过利用玻璃壳体封装量子点荧光粉，可以起到水氧的阻隔作用，同时不易使量子点荧光粉中的有毒元素外泄，提高安全性。另外，玻璃壳体的体积较小，与现有技术的玻璃管相比，不易破碎，且制作成本低。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是一种现有的采用量子点荧光粉膜片的背光模块；
图2是另一种现有的采用量子点荧光粉膜片的背光模块；
图3是根据本发明的实施例的液晶显示装置的结构示意图；
图4是根据本发明的实施例的白光LED的结构示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图3是根据本发明的实施例的液晶显示装置的结构示意图。
参照图3，根据本发明的实施例的液晶显示装置包括液晶显示面板200及与液晶显示面板200相对设置的背光模块100，其中，背光模块100提供显示光源给液晶显示面板200，以使液晶显示面板200显示影像。
液晶显示面板200通常包括薄膜晶体管(Thin Film Transistor，简称TFT)阵列基板210、与TFT阵列基板相对设置的彩色滤光片(Color Filter，简称CF)基板220以及夹设于TFT阵列基板210与CF基板220之间的液晶层230，其中，液晶层230中包括若干液晶分子。由于本实施例的液晶显示面板200的具体结构与现有技术的液晶显示面板的结构大体相同，所以在此不再详细描述。
根据本发明的实施例的背光模块100包括：导光板110、白光发光二极管(LED)120、反射片130、第一增亮膜片141和第二增亮膜片142、扩散膜片150。应当理解的是，本发明中的白光LED120的数量不限于图3中所示的数量为限。
具体而言，导光板110包括入光侧面111及出光面112。白光LED120邻近于导光板110的入光侧面111设置。第一增亮膜片141、第二增亮膜片142、扩散膜片150依序设置在导光板110的出光面112之上，其中，第一增亮膜片141和第二增亮膜片142用于汇聚由出光面112出射的光，以提高由出光面112出射的光的亮度；扩散膜片150用于提升经第一增亮膜片141和第二增亮膜片142后的光的向上亮度，并将经第一增亮膜片141和第二增亮膜片142后的光柔散化，从而向液晶显示面板200提供均匀的面光源。反射片130设置在导光板110的底面之下，用于将由导光板110的底面出射的光反射回导光板110中，以提供导光板110中光的利用率。
应当说明的是，根据本发明的实施例的背光模块100还包括背板、胶框等其他必要的部件，具体可参考现有的背光模块的结构。
以下，将参照图4对根据本发明的实施例的白光LED120进行详细的说明。图4是根据本发明的实施例的白光LED的结构示意图。
参照图4，根据本发明的实施例的白光LED120包括：基座121、两个单色光LED芯片122、反光杯123、封装胶124、第一量子点结构体125及第二量子点结构体126。应当理解的是，本发明中的单色光LED芯片122的数量不限于图4中所示的数量为限。
具体而言，两个单色光LED芯片122位于基座121上，且两个单色光LED芯片122通过金线(图未示出)串联在一起。这里，所述单色光LED芯片指 的是该LED芯片仅产生单一颜色的光。发光杯123位于基座121上且环绕两个单色光LED122，以使两个单色光LED122产生的光朝向两个单色光LED122的正面出射，从而提高两个单色光LED122产生的光的利用率。封装胶124填充于反光杯123中以密封两个单色光LED122。第一量子点结构体125和第二量子点结构体126均被封装于封装胶124中，其中，两个单色光LED122产生的光、第一量子点结构体125被激发后产生的光以及第二量子点结构体126被激发后产生的光混合形成白光。这里，第一量子点结构体125被激发后产生的光指的是两个单色光LED122产生的光激发第一量子点结构体125中的量子点材料而产生的光，同理，第二量子点结构体126被激发后产生的光指的是两个单色光LED122产生的光激发第二量子点结构体126中的量子点材料而产生的光。
进一步地，单色光LED122优选为蓝光LED，但本发明并不限制于此。第一量子点结构体125包括第一透明壳体1251及红色量子点荧光粉1252，其中，该第一透明壳体1251包裹红色量子点荧光粉1252。蓝光LED122产生的蓝光激发红色量子点荧光粉1252而产生红光。同样地，第二量子点结构体126包括第一透明壳体1261及绿色量子点荧光粉1262，其中，该第二透明壳体1261包裹绿色量子点荧光粉1262。蓝光LED122产生的蓝光激发绿色量子点荧光粉1262而产生绿光。蓝光LED122产生的蓝光、激发红色量子点荧光粉1252而产生的红光以及激发绿色量子点荧光粉1262而产生的绿光混合形成白光。
在本实施例中，优选地，第一透明壳体1251和第二透明壳体1261均由透明玻璃支撑，但本发明并不限制于此。这样，通过利用玻璃壳体封装量子点荧光粉，可以起到水氧的阻隔作用，同时不易使量子点荧光粉中的有毒元素外泄，提高安全性。
此外，反光杯123可例如由塑胶材料制成，但本发明并不限制于此，并且在反光杯123的内壁上设有反光镀膜层1231。另外，封装胶124可例如由硅胶材料或环氧树脂材料制成。
综上所述，根据本发明的实施例，通过利用玻璃壳体封装量子点荧光粉，可以起到水氧的阻隔作用，同时不易使量子点荧光粉中的有毒元素外泄，提高安全性。另外，玻璃壳体的体积较小，与现有技术的玻璃管相比，不易破碎， 且制作成本低。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (18)

  1. 一种白光LED，其中，包括基座、至少一位于所述基座上的单色光LED芯片、位于所述基座上且环绕所述单色光LED芯片的反光杯、填充于所述反光杯中以密封所述单色光LED芯片的封装胶以及被封装于所述封装胶中的第一量子点结构体和第二量子点结构体，所述单色光LED芯片产生的光、激发所述第一量子点结构体产生的光以及激发所述第二量子点结构体产生的光混合形成白光。
  2. 根据权利要求1所述的白光LED，其中，所述单色光LED芯片为蓝光LED芯片。
  3. 根据权利要求1所述的白光LED，其中，所述第一量子点结构体包括第一透明壳体及红色量子点荧光粉，所述第一透明壳体包裹所述红色量子点荧光粉；所述第二量子点结构体包括第二透明壳体及绿色量子点荧光粉，所述第二透明壳体包裹所述绿色量子点荧光粉。
  4. 根据权利要求3所述的白光LED，其中，所述第一透明壳体由透明玻璃材料制成；所述第二透明壳体由透明玻璃材料制成。
  5. 根据权利要求1所述的白光LED，其中，所述反光杯由塑胶材料制成，所述反光杯的内壁上设有反光镀膜层。
  6. 根据权利要求1所述的白光LED，其中，所述封装胶由硅胶材料或环氧树脂材料制成。
  7. 一种背光模块，至少包括：
    导光板，具有入光侧面；
    白光LED，邻近于所述入光侧面设置；
    其中，所述白光LED包括基座、至少一位于所述基座上的单色光LED芯片、位于所述基座上且环绕所述单色光LED芯片的反光杯、填充于所述反光 杯中以密封所述单色光LED芯片的封装胶以及被封装于所述封装胶中的第一量子点结构体和第二量子点结构体，所述单色光LED芯片产生的光、激发所述第一量子点结构体产生的光以及激发所述第二量子点结构体产生的光混合形成白光。
  8. 根据权利要求7所述的背光模块，其中，所述单色光LED芯片为蓝光LED芯片。
  9. 根据权利要求7所述的背光模块，其中，所述第一量子点结构体包括第一透明壳体及红色量子点荧光粉，所述第一透明壳体包裹所述红色量子点荧光粉；所述第二量子点结构体包括第二透明壳体及绿色量子点荧光粉，所述第二透明壳体包裹所述绿色量子点荧光粉。
  10. 根据权利要求9所述的背光模块，其中，所述第一透明壳体由透明玻璃材料制成；所述第二透明壳体由透明玻璃材料制成。
  11. 根据权利要求7所述的背光模块，其中，所述反光杯由塑胶材料制成，所述反光杯的内壁上设有反光镀膜层。
  12. 根据权利要求7所述的背光模块，其中，所述封装胶由硅胶材料或环氧树脂材料制成。
  13. 一种液晶显示装置，包括背光模块及设置在所述背光模块之上的液晶显示面板，所述背光模块包括具有入光侧面的导光板及邻近于所述入光侧面设置的白光LED，其中，所述白光LED包括基座、至少一位于所述基座上的单色光LED芯片、位于所述基座上且环绕所述单色光LED芯片的反光杯、填充于所述反光杯中以密封所述单色光LED芯片的封装胶以及被封装于所述封装胶中的第一量子点结构体和第二量子点结构体，所述单色光LED芯片产生的光、激发所述第一量子点结构体产生的光以及激发所述第二量子点结构体产生的光混合形成白光。
  14. 根据权利要求13所述的液晶显示装置，其中，所述单色光LED芯片为蓝光LED芯片。
  15. 根据权利要求13所述的液晶显示装置，其中，所述第一量子点结构 体包括第一透明壳体及红色量子点荧光粉，所述第一透明壳体包裹所述红色量子点荧光粉；所述第二量子点结构体包括第二透明壳体及绿色量子点荧光粉，所述第二透明壳体包裹所述绿色量子点荧光粉。
  16. 根据权利要求15所述的液晶显示装置，其中，所述第一透明壳体由透明玻璃材料制成；所述第二透明壳体由透明玻璃材料制成。
  17. 根据权利要求13所述的液晶显示装置，其中，所述反光杯由塑胶材料制成，所述反光杯的内壁上设有反光镀膜层。
  18. 根据权利要求13所述的液晶显示装置，其中，所述封装胶由硅胶材料或环氧树脂材料制成。
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