CN106200128A - Quantum dot backlight module and display device - Google Patents

Quantum dot backlight module and display device Download PDF

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Publication number
CN106200128A
CN106200128A CN201610824163.0A CN201610824163A CN106200128A CN 106200128 A CN106200128 A CN 106200128A CN 201610824163 A CN201610824163 A CN 201610824163A CN 106200128 A CN106200128 A CN 106200128A
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China
Prior art keywords
quantum dot
light
green
film
dot film
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Granted
Application number
CN201610824163.0A
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Chinese (zh)
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CN106200128B (en
Inventor
郭庆
韩梅
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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 CN201610824163.0A priority Critical patent/CN106200128B/en
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133614Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The present invention provides a kind of quantum dot backlight module and display device, it includes glue frame, light source assembly, light guide plate, quantum dot film, bright enhancement film and shading rubber belt, quantum dot film, bright enhancement film and shading rubber belt are sequentially overlapped and are arranged on light guide plate, and glue frame is around light guide plate, quantum dot film, bright enhancement film and shading rubber belt and houses light source assembly;Wherein, shading rubber belt includes a green ink face relative with black ink face for the black ink face of shading and, and green ink facing to quantum dot film, mixes for reflecting green glow the abnormal light that sends with quantum dot film surrounding;The quantum dot backlight module of the present invention, by shading gummed paper reflection green glow with the quantum dot film surrounding place of cutting because being affected by water Oxygen permeation, the abnormal Colored light mixing causing green quantum point failure and send, so that the edge of quantum dot film can send pure white coloured light, promote the display quality of liquid crystal panel further.

Description

Quantum dot backlight module and display device
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a quantum dot backlight module and a display device.
Background
At present, the color gamut level of a liquid crystal display device is generally about 72%, in order to improve the color gamut level, a quantum dot backlight source technology is developed, and quantum dots are quasi-zero-dimensional nano materials and are composed of a small number of atoms; the particle size of the fluorescent material is generally between 1 nm and 10nm, and as electrons and holes are limited by quanta, a continuous energy band structure is changed into a discrete energy level structure with molecular characteristics, and the fluorescent material can emit fluorescence after being excited, so that the color gamut of injected light is changed. The quantum dot backlight source technology can improve the color gamut level of the display device to more than 100%. In the prior art, a quantum dot backlight source technology is generally adopted, and a quantum dot layer is dispersed and coated on a polyester film to form a quantum dot film, so that a diffusion film is replaced.
However, the quantum dot film is volatile in an environment containing water and oxygen, when a module is assembled, partial water and oxygen can permeate into the edge of the quantum dot film when the module is cut, and the green quantum dots are smaller in particle size and higher in surface energy than the red quantum dots, so that the green quantum dots are more prone to reacting with the water and oxygen to lose efficacy, and the failure area is purple red due to the fact that the blue light and the red light of the red quantum dots are mixed, and the display quality of the liquid crystal panel is affected.
Therefore, it is necessary to provide a quantum dot backlight module and a display device to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide a quantum dot backlight module to solve the technical problem that the display quality of a liquid crystal panel is influenced because the cutting part at the periphery of a quantum dot film of the conventional quantum dot backlight module is easily influenced by water and oxygen permeation to emit abnormal color light.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
a quantum dot backlight module, comprising: the light source module comprises a rubber frame, a light source module, a light guide plate, a quantum dot film, a brightness enhancement film and a shading adhesive tape, wherein the quantum dot film, the brightness enhancement film and the shading adhesive tape are sequentially overlapped on the light guide plate; wherein,
the shading adhesive tape comprises a black ink surface for shading and a green ink surface opposite to the black ink surface, wherein the green ink surface faces the quantum dot film and is used for reflecting green light and mixing the green light with light emitted from the periphery of the quantum dot film.
In the quantum dot backlight module, the black ink face and the green ink face have viscosity.
In the quantum dot backlight module, the shading adhesive tape is made of polyethylene terephthalate.
In the quantum dot backlight module, the light source assembly comprises a plurality of blue LED lamps and a circuit board for bearing the blue LED lamps.
In the quantum dot backlight module, the light guide plate comprises a light incident surface, a light emergent surface and a bottom surface, the light incident surface is connected with the light emergent surface and the bottom surface, the light incident surface faces the light source assembly, the light emergent surface faces the quantum dot film, and dots are arranged on the bottom surface.
According to the above object of the present invention, a display device is provided, which includes a liquid crystal display module and a quantum dot backlight module, wherein the quantum dot backlight module includes: the light source module comprises a rubber frame, a light source module, a light guide plate, a quantum dot film, a brightness enhancement film and a shading adhesive tape, wherein the quantum dot film, the brightness enhancement film and the shading adhesive tape are sequentially overlapped on the light guide plate; wherein,
the shading adhesive tape comprises a black ink surface for shading light and a green ink surface opposite to the black ink surface, wherein the green ink surface faces the quantum dot film and is used for reflecting green light and mixing the green light with abnormal light emitted by the periphery of the quantum dot film.
In the display device of the present invention, the black ink face and the green ink face have tackiness.
In the display device of the present invention, the light-shielding tape is made of polyethylene terephthalate.
In the display device of the invention, the light source assembly comprises a plurality of blue light LED lamps and a circuit board for bearing the plurality of blue light LED lamps.
In the display device of the invention, the light guide plate comprises a light incident surface, a light emergent surface and a bottom surface, the light incident surface is connected with the light emergent surface and the bottom surface, the light incident surface faces the light source assembly, the light emergent surface faces the quantum dot film, and dots are arranged on the bottom surface.
The invention has the beneficial effects that: compared with the existing quantum dot backlight module, the quantum dot backlight module has the advantages that one side of the shading gummed paper is set to be the black ink side, the other side of the shading gummed paper is set to be the green ink side, and the green ink side faces the quantum dot film, so that the shading gummed paper not only plays a role in shading, but also can reflect green light and abnormal color light emitted by the failure of green quantum dots due to the fact that the cutting positions around the quantum dot film are influenced by permeation of water and oxygen, the edges of the quantum dot film can emit pure white light, and the display quality of a liquid crystal panel is further improved.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic structural diagram of a quantum dot backlight module according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a middle area light of a quantum dot backlight module according to a preferred embodiment of the present invention;
fig. 3 is a schematic view of light rays in the peripheral area of a quantum dot backlight module according to a preferred embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a preferred embodiment of a quantum dot backlight module according to the present invention;
as shown in fig. 1, the quantum dot backlight module of the preferred embodiment includes: a rubber frame 101, a light source assembly (including 1021 and 1022), a light guide plate 103, a quantum dot film 104, a brightness enhancement film 105, and a light shielding tape 106; the quantum dot film 104, the brightness enhancement film 105, and the light shielding tape 106 are sequentially stacked on the light guide plate 103, and the rubber frame 101 surrounds the light guide plate 103, the quantum dot film 104, the brightness enhancement film 105, and the light shielding tape 106 and accommodates the light source module.
Specifically, the light guide plate 103 includes a light incident surface, a light emitting surface and a bottom surface, the light incident surface is connected to the light emitting surface and the bottom surface, the light incident surface faces the light source assembly, the light emitting surface faces the quantum dot film 104, the bottom surface is provided with dots, and the bottom surface is provided with a reflective film 110 below.
The light source assembly comprises a plurality of blue LED lamps 1022 and a circuit board 1021 carrying the plurality of blue LED lamps 1022; the light emitting surface of the blue LED lamp 1022 faces the light incident surface of the light guide plate 103.
The quantum dot backlight module is provided with a liquid crystal display module, wherein the liquid crystal display module comprises a thin film transistor array substrate 107, a color filter substrate 109 and liquid crystal 108 arranged between the thin film transistor array substrate 107 and the color filter substrate 109.
The backlight module of the preferred embodiment sets one side of the original shading adhesive tape 106 for shading the backlight module to be a green ink surface on the premise of not increasing the whole thickness of the backlight module, thereby solving the problems in the prior art.
Specifically, the light-shielding tape 106 on the quantum dot backlight module of the preferred embodiment includes a black ink surface and a green ink surface opposite to the black ink surface; the black ink surface is used for shielding light additionally exposed by the backlight module, and the green ink surface is used for reflecting green light and mixing the green light with light emitted from the periphery of the quantum dot film 104 to form normal light.
The black ink surface and the green ink surface on the light-shielding tape 106 on the backlight module of the preferred embodiment have viscosity, and the green ink surface faces the quantum dot film 104 and is closely attached to the brightness enhancement film 105; the green printing ink face faces the liquid crystal display module and is tightly attached to the liquid crystal display module.
The light-shielding tape 106 of the preferred embodiment is made of polyethylene terephthalate, wherein the thickness of the light-shielding tape 106 does not affect the overall thickness of the backlight module.
Referring to fig. 2, fig. 2 is a schematic view of a middle area light of a preferred embodiment of the quantum dot backlight module of the present invention;
it should be noted that Quantum Dots (QD for short) are inorganic nanocrystals invisible to the naked eye, and extremely tiny inorganic nanocrystals, the crystal diameter is between 2 to 10 nanometers, and the nanocrystals are composed of zinc, cadmium, selenium and sulfur atoms, and the photoelectric characteristics of the nanocrystals are unique, so that after being stimulated by photoelectricity, pure monochromatic light with various colors can be emitted according to the diameter of the Quantum Dots, the color of the light source 102 can be changed, and the Quantum Dots can emit very pure colored light whenever being stimulated by light.
The quantum dot film on the backlight module of the preferred embodiment includes green quantum dots c and red quantum dots b, wherein the green quantum dots c are excited by the light source to emit pure green fluorescence, and the red quantum dots b are excited by the light source to emit pure red fluorescence.
On the middle area of the quantum dot film, the green quantum dots c and the red quantum dots b are uniformly distributed, the blue light a emitted by the blue LED lamp 1022 is converted into the surface light source through the light guide plate 103, and then the red quantum dots b and the green quantum dots c are excited to emit pure red fluorescence and pure green fluorescence through the quantum dot film 104, wherein the blue light a, the green light and the red light emitted by the blue LED lamp are mixed to present normal white light, and then the white light is provided for the liquid crystal display module.
Referring to fig. 3, fig. 3 is a schematic view of light rays in the peripheral area of the preferred embodiment of the quantum dot backlight module of the present invention;
the light shielding tape 106 is covered on the peripheral area of the quantum dot film 104, and the side of the light shielding tape 106 with the green ink faces the quantum dot film 104. Similarly, the red quantum dots b1 and the green quantum dots c1 are uniformly distributed on the peripheral area of the quantum dot film, however, when the backlight module is assembled, the quantum dot film 104 is cut, so that the red quantum dots b1 and the green quantum dots c1 on the peripheral area of the quantum dot film 104 are eroded by water and oxygen to fail, and because the particle size of the green quantum dots c1 is smaller than that of the red quantum dots b1, the green quantum dots c1 are more likely to react with water and oxygen to fail, so that only the red quantum dots b1 on the peripheral area of the quantum dot film are left to be effective.
Specifically, in the peripheral area of the quantum dot film 104, the blue light a1 emitted by the blue LED lamp 1022 is converted into a surface light source through the light guide plate 103, and then passes through the quantum dot film 104, because the green quantum dot c1 in the peripheral area of the quantum dot film fails, the green quantum dot c1 cannot be excited to emit pure green fluorescence, only the red quantum dot b1 excites pure red fluorescence, and the blue light a1 emitted by the blue LED lamp reflects green light through the green ink surface on the light-shielding tape, and the blue light a1, the green light and the red light are mixed to present normal white light, and then the normal white light is provided for the liquid crystal display panel.
This quantum dot backlight unit of preferred embodiment sets shading adhesive tape one side to black printing ink face, and the one side sets to green printing ink face, and with green printing ink face towards the quantum dot film, make shading adhesive tape not only play the effect of shading, and can reflect green glow and quantum dot film and cut the department because of receiving water oxygen infiltration influence all around, lead to the unusual chromatic light mixture that green quantum dot inefficacy sent, thereby make the edge of quantum dot film can send pure white light, further promote liquid crystal display panel's display quality.
The present invention also provides a display device, comprising:
a liquid crystal display module;
the quantum dot backlight module is used for providing backlight for the liquid crystal display module; the quantum dot backlight module comprises a rubber frame, a light source component, a light guide plate, a quantum dot film, a brightness enhancement film and a shading adhesive tape, wherein the quantum dot film, the brightness enhancement film and the shading adhesive tape are sequentially overlapped on the light guide plate; wherein,
the shading adhesive tape comprises a black ink surface for shading light and a green ink surface opposite to the black ink surface, wherein the green ink surface faces the quantum dot film and is used for reflecting green light and mixing the green light with abnormal light emitted by the periphery of the quantum dot film.
In the display device of the present preferred embodiment, the black ink face and the green ink face have tackiness.
In the display device of the preferred embodiment, the material of the light-shielding tape is polyethylene terephthalate.
In the display device of the preferred embodiment, the light source assembly includes a plurality of blue LEDs and a circuit board for carrying the plurality of blue LEDs.
In the display device of the preferred embodiment, the light guide plate includes a light incident surface, a light emergent surface and a bottom surface, the light incident surface is connected with the light emergent surface and the bottom surface, the light incident surface faces the light source assembly, the light emergent surface faces the quantum dot film, and dots are arranged on the bottom surface.
The specific structure of the display device provided by the preferred embodiment is the same as or similar to that of the preferred embodiment of the quantum dot backlight module, and please refer to the related description in the preferred embodiment of the quantum dot backlight module.
The display device of this preferred embodiment sets shading adhesive tape one side to black printing ink face, and the one side sets to green printing ink face, and with green printing ink face towards the quantum dot film, make shading adhesive tape not only play the effect of shading, and can reflect green glow and quantum dot film and cut the department because of receiving water oxygen infiltration influence all around, lead to the unusual chromatic light mixture that green quantum dot inefficacy sent, thereby make the edge of quantum dot film can send pure white light, further promote liquid crystal display panel's display quality.
According to the quantum dot backlight module and the display device, one surface of the shading gummed paper is set to be the black ink surface, the other surface of the shading gummed paper is set to be the green ink surface, and the green ink surface faces the quantum dot film, so that the shading gummed paper not only plays a role in shading, but also can reflect green light and abnormal color light emitted by failure of green quantum dots due to the fact that the cutting positions around the quantum dot film are affected by permeation of water and oxygen, so that pure white light can be emitted from the edge of the quantum dot film, and the display quality of the liquid crystal panel is further improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. A quantum dot backlight module is characterized by comprising a rubber frame, a light source component, a light guide plate, a quantum dot film, a brightness enhancement film and a shading adhesive tape, wherein the quantum dot film, the brightness enhancement film and the shading adhesive tape are sequentially overlapped on the light guide plate; wherein,
the shading adhesive tape comprises a black ink surface for shading and a green ink surface opposite to the black ink surface, wherein the green ink surface faces the quantum dot film and is used for reflecting green light and mixing the green light with light emitted from the periphery of the quantum dot film.
2. The quantum dot backlight module of claim 1, wherein the black ink side and the green ink side are tacky.
3. The quantum dot backlight module of claim 1, wherein the light-shielding tape is made of polyethylene terephthalate.
4. The quantum dot backlight module of claim 1, wherein the light source assembly comprises a plurality of blue LED lamps and a circuit board carrying the plurality of blue LED lamps.
5. The quantum dot backlight module of claim 1, wherein the light guide plate comprises a light incident surface, a light emitting surface and a bottom surface, the light incident surface is connected to the light emitting surface and the bottom surface, the light incident surface faces the light source module, the light emitting surface faces the quantum dot film, and the bottom surface is provided with dots.
6. The utility model provides a display device which characterized in that, includes liquid crystal display module assembly and quantum dot backlight unit, quantum dot backlight unit includes: the light source module comprises a rubber frame, a light source module, a light guide plate, a quantum dot film, a brightness enhancement film and a shading adhesive tape, wherein the quantum dot film, the brightness enhancement film and the shading adhesive tape are sequentially overlapped on the light guide plate; wherein,
the shading adhesive tape comprises a black ink surface for shading light and a green ink surface opposite to the black ink surface, wherein the green ink surface faces the quantum dot film and is used for reflecting green light and mixing the green light with abnormal light emitted by the periphery of the quantum dot film.
7. The display device according to claim 6, wherein the black ink face and the green ink face have tackiness.
8. The display device according to claim 6, wherein a material of the light shielding tape is polyethylene terephthalate.
9. The display device as claimed in claim 6, wherein the light source assembly comprises a plurality of blue LED lamps and a circuit board carrying the plurality of blue LED lamps.
10. The display device as claimed in claim 6, wherein the light guide plate includes a light incident surface, a light emitting surface and a bottom surface, the light incident surface is connected to the light emitting surface and the bottom surface, the light incident surface faces the light source assembly, the light emitting surface faces the quantum dot film, and the bottom surface is provided with dots.
CN201610824163.0A 2016-09-14 2016-09-14 Quantum dot backlight module and display device Active CN106200128B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108227071A (en) * 2018-01-31 2018-06-29 广东欧珀移动通信有限公司 A kind of backlight module and electronic device
CN108594356A (en) * 2018-05-08 2018-09-28 厦门佰亨源量子光电科技有限公司 A kind of aqueous quantum dot crystallite light guide plate and preparation method thereof
CN108646327A (en) * 2018-05-08 2018-10-12 厦门佰亨源量子光电科技有限公司 A kind of aqueous quantum dot crystallite diffuser plate and preparation method thereof
CN112859437A (en) * 2021-01-22 2021-05-28 惠州Tcl移动通信有限公司 Blue light LED backlight unit's assembly structure and display device

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CN104865749A (en) * 2015-06-03 2015-08-26 武汉华星光电技术有限公司 Optical diaphragm set, backlight module and liquid crystal display
CN104932141A (en) * 2015-06-09 2015-09-23 武汉华星光电技术有限公司 Backlight module and display device
CN105090808A (en) * 2014-05-13 2015-11-25 扬升照明股份有限公司 Backlight module
CN105824151A (en) * 2016-05-10 2016-08-03 深圳市华星光电技术有限公司 Backlight module and display device

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Publication number Priority date Publication date Assignee Title
US20150160401A1 (en) * 2013-12-06 2015-06-11 Japan Display Inc. Backlight and liquid-crystal display apparatus using the same
CN105090808A (en) * 2014-05-13 2015-11-25 扬升照明股份有限公司 Backlight module
CN104865749A (en) * 2015-06-03 2015-08-26 武汉华星光电技术有限公司 Optical diaphragm set, backlight module and liquid crystal display
CN104932141A (en) * 2015-06-09 2015-09-23 武汉华星光电技术有限公司 Backlight module and display device
CN105824151A (en) * 2016-05-10 2016-08-03 深圳市华星光电技术有限公司 Backlight module and display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108227071A (en) * 2018-01-31 2018-06-29 广东欧珀移动通信有限公司 A kind of backlight module and electronic device
CN108594356A (en) * 2018-05-08 2018-09-28 厦门佰亨源量子光电科技有限公司 A kind of aqueous quantum dot crystallite light guide plate and preparation method thereof
CN108646327A (en) * 2018-05-08 2018-10-12 厦门佰亨源量子光电科技有限公司 A kind of aqueous quantum dot crystallite diffuser plate and preparation method thereof
CN112859437A (en) * 2021-01-22 2021-05-28 惠州Tcl移动通信有限公司 Blue light LED backlight unit's assembly structure and display device

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