CN110286520B - Quantum dot backlight source and display device with same - Google Patents
Quantum dot backlight source and display device with same Download PDFInfo
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- CN110286520B CN110286520B CN201910457987.2A CN201910457987A CN110286520B CN 110286520 B CN110286520 B CN 110286520B CN 201910457987 A CN201910457987 A CN 201910457987A CN 110286520 B CN110286520 B CN 110286520B
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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
-
- 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
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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
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The invention discloses a quantum dot backlight source and a display device with the same; the quantum dot backlight source comprises a PCB (printed circuit board), a plurality of white light LED lamp beads arranged on the PCB, a plurality of blue light LED lamp beads arranged on the PCB, a light guide plate, a reflector plate and a quantum dot film material; one side surface of the light guide plate is a light incident surface, and the upper top surface of the light guide plate is a light emergent surface; the PCB circuit board is abutted against one side surface of the light guide plate; the reflecting sheet is stacked on the lower bottom surface of the light guide plate; the quantum dot film material is stacked on the upper top surface of the light guide plate. White light emitted by the plurality of white light LED lamp beads can be emitted from the top surface of the quantum dot film material after being uniformly guided by the light guide plate, blue light emitted by the plurality of blue light LED lamp beads can be uniformly emitted into the quantum dot film material after being uniformly guided by the light guide plate to excite red light quantum dots and green light quantum dots in the quantum dot film material to correspondingly generate red light and green light, and the white light can be formed after the blue light is mixed with the red light and the green light and emitted from the top surface of the quantum dot film material.
Description
Technical Field
The invention relates to the technical field of display, in particular to a quantum dot backlight source and a display device with the same.
Background
For the conventional liquid crystal display panel, the conventional liquid crystal display panel does not emit light, and display can be performed by means of an external light source, generally speaking, the external light source includes a backlight light source and a reflective light source, and the backlight light source is actively illuminated and is not affected by environmental changes, so that most of the conventional liquid crystal display panels adopt the backlight light source.
In the conventional backlight source, the quantum dot backlight module can effectively improve the color gamut level of the display device relative to the conventional backlight source, so that most liquid crystal display panels begin to adopt the quantum dot backlight module as a light source.
In a quantum dot film of a conventional quantum dot backlight module, red light quantum dots and green light quantum dots of the quantum dot film can correspondingly generate red light and green light under the excitation of blue light, and then the red light quantum dots and the green light quantum dots are mixed to form white light.
Therefore, the structures of the existing quantum dot backlight and the display device with the quantum dot backlight need to be improved.
Disclosure of Invention
The present invention is directed to a quantum dot backlight and a display device having the same, which overcome the above-mentioned shortcomings of the prior art.
The invention solves the technical problem that the prior art adopts a technical scheme that:
a quantum dot backlight source comprises a strip-shaped PCB (printed circuit board), a plurality of white light LED lamp beads uniformly arranged on the upper end surface of the strip-shaped PCB, a plurality of blue light LED lamp beads uniformly arranged on the lower bottom surface of the strip-shaped PCB, a light guide plate, a reflector plate and a quantum dot film material;
one side surface of the light guide plate is a light incident surface, and the upper top surface of the light guide plate is a light emergent surface; the strip-shaped PCB circuit board abuts against one side face of the light guide plate, so that the light emitting directions of the white light LED lamp beads and the light emitting directions of the blue light LED lamp beads face the light inlet face; the reflecting sheet is stacked on the lower bottom surface of the light guide plate; the quantum dot film material is laminated on the upper top surface of the light guide plate.
The above technical solution is further described as follows:
preferably, the quantum dot film material contains a plurality of red light quantum dots and a plurality of green light quantum dots, and the plurality of red light quantum dots and the plurality of green light quantum dots are uniformly and alternately distributed.
Preferably, a plurality of the red light quantum dots and a plurality of the green light quantum dots are distributed in a staggered manner in a plurality of rows and a plurality of columns.
Preferably, the quantum dot film further comprises a light diffusion plate which is laminated on the upper top surface of the quantum dot film and used for guiding light upwards; the upper top surface of the light diffusion plate is formed into a sawtooth structure or a wave-shaped structure.
Preferably, the quantum dot film material further comprises an isolation protective layer arranged on the lower bottom surface of the quantum dot film material and used for isolating oxygen and moisture;
the isolation protection layer is provided with a latticed heat conducting circuit, and the latticed heat conducting circuit is any one of gold, graphene, silver, copper, polyaniline, polypyrrole or polythiophene.
The invention solves the other technical scheme adopted by the prior art and comprises the following steps:
a display device comprises a rear shell, a face cover with a window in the middle, a liquid crystal panel and the quantum dot backlight source;
the rear shell comprises a metal shell with an open upper end and an inner adhesive protection layer A injected on the inner surface of the metal shell; a plurality of positioning holes are uniformly formed in the upper peripheral edge of the inner glue protection layer A downwards, and a containing groove for placing the quantum dot backlight source is formed in the inner glue protection layer A;
the surface cover comprises a metal cover body and an inner adhesive protection layer B which is injected on the inner surface of the metal cover body; a plurality of positioning protrusions corresponding to the positioning holes at corresponding positions are arranged on the lower peripheral edge of the inner glue protection layer B in a downward protruding mode close to the outer side of the lower peripheral edge of the inner glue protection layer B, and a circle of concave steps used for clamping and fixing the liquid crystal panel are formed on the lower peripheral edge of the inner glue protection layer B in an upward concave mode close to the inner side of the lower peripheral edge of the inner glue protection layer B;
the quantum dot backlight source comprises a strip-shaped PCB (printed circuit board), a plurality of white light LED lamp beads uniformly arranged on the upper end surface of the strip-shaped PCB, a plurality of blue light LED lamp beads uniformly arranged on the lower bottom surface of the strip-shaped PCB, a light guide plate, a reflector plate and a quantum dot film material; one side surface of the light guide plate is a light incident surface, and the upper top surface of the light guide plate is a light emergent surface; the strip-shaped PCB circuit board abuts against one side face of the light guide plate, so that the light emitting directions of the white light LED lamp beads and the light emitting directions of the blue light LED lamp beads face the light inlet face; the reflecting sheet is stacked on the lower bottom surface of the light guide plate; the quantum dot film material is laminated on the upper top surface of the light guide plate.
When the face cover is covered on the rear shell, the positioning protrusions are correspondingly clamped in the positioning holes, so that the liquid crystal panel and the quantum dot backlight source are fixed into a whole.
The above technical solution is further described as follows:
preferably, the quantum dot film contains a plurality of red light quantum dots and a plurality of green light quantum dots, and the plurality of red light quantum dots and the plurality of green light quantum dots are uniformly and alternately distributed.
Preferably, a plurality of the red light quantum dots and a plurality of the green light quantum dots are distributed in a staggered manner in a plurality of rows and a plurality of columns.
Preferably, the quantum dot film further comprises a light diffusion plate which is laminated on the upper top surface of the quantum dot film and used for guiding light upwards; the upper top surface of the light diffusion plate is formed into a sawtooth structure or a wave-shaped structure.
Preferably, the quantum dot film material further comprises an isolation protective layer arranged on the lower bottom surface of the quantum dot film material and used for isolating oxygen and moisture;
the isolation protection layer is provided with a latticed heat conducting circuit, and the latticed heat conducting circuit is any one of gold, graphene, silver, copper, polyaniline, polypyrrole or polythiophene.
The invention has the beneficial effects that:
firstly, when the quantum dot backlight source and the display device with the quantum dot backlight source are implemented specifically, on one hand, white light emitted by the white light LED lamp beads arranged on the upper end face of the strip-shaped PCB can be directly emitted upwards from the upper top face of the quantum dot film material after being uniformly guided upwards by the light guide plate, and on the other hand, blue light emitted by the blue light LED lamp beads arranged on the lower bottom face of the strip-shaped PCB can be uniformly emitted into the quantum dot film material after being uniformly guided upwards by the light guide plate, so that red light quantum dots and green light quantum dots in the quantum dot film material can be excited to correspondingly generate red light and green light, and then, the corresponding blue light and the generated red light and green light can be mixed to form white light and directly emitted upwards from the upper top face of the quantum dot film material.
Secondly, in the technical scheme, on one hand, the quantum dot backlight source and the display device with the quantum dot backlight source provided by the invention also comprise light diffusion plates which are laminated on the upper top surface of the quantum dot film material and are used for guiding light upwards; the upper top surface of the light expansion plate is formed into a sawtooth structure or a wave structure, so that formed white light can be effectively scattered after passing through the upper top surface of the light expansion plate with the sawtooth structure or the wave structure, and then can be effectively mixed, so that the chromaticity uniformity of the white light emitting light can be greatly improved.
Drawings
Fig. 1 is a schematic view of an overall structure of the quantum dot backlight source according to the embodiment of the present invention;
fig. 2 is an exploded view of the quantum dot backlight source according to the embodiment of the present invention;
FIG. 3 is a bottom perspective view of the quantum dot film of FIG. 2;
FIG. 4 is a bottom view of the isolation and protection layer of FIG. 2;
FIG. 5 is a schematic diagram of an overall structure of the display device according to the embodiment of the present invention;
FIG. 6 is an exploded view of the display device in accordance with an embodiment of the present invention;
FIG. 7 is an exploded view of the rear housing and the strip PCB board of FIG. 6 from another perspective;
FIG. 8 is an enlarged view of A in FIG. 7;
the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Reference numerals:
a quantum dot backlight 1000;
a strip-shaped PCB circuit board 10;
a white light LED lamp bead 20;
a blue LED lamp bead 30;
a light guide plate 40;
a light incident surface 401; a light-emitting surface 402;
a reflective sheet 50;
a quantum dot film material 60;
red light quantum dots 601; green quantum dots 602;
a light diffusion plate 70;
a sawtooth structure 701;
an isolation protection layer 80;
a grid-shaped heat conductive line 801;
a display device 2000;
a rear housing 90;
a metal case 901; a wire passing groove 9011; an inner glue protection layer A902; a positioning hole 9021; a containing groove 9022; a strip-shaped boss 9023; a first card slot 90231; a second card slot 90232; a third card slot 90233;
a face cover 100;
a metal cover 1001; an inner glue protection layer B1002; positioning boss 10021; the concave step 10022;
a liquid crystal panel 110.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so as to clearly and intuitively understand the inventive spirit of the present invention.
Example one
As shown in fig. 1, 2, 3 and 4;
the invention provides a quantum dot backlight source 1000 for solving the problems of the prior art, which comprises a strip-shaped PCB (printed circuit board) 10, a plurality of white light LED lamp beads 20 uniformly arranged on the upper end surface of the strip-shaped PCB 10, a plurality of blue light LED lamp beads 30 uniformly arranged on the lower bottom surface of the strip-shaped PCB 10, a light guide plate 40, a reflector plate 50 and a quantum dot film material 60;
one side surface of the light guide plate 40 is a light incident surface 401, and the upper top surface is a light emitting surface 402; the strip-shaped PCB circuit board 10 abuts against one side face of the light guide plate 40, so that the light emitting directions of the white light LED lamp beads 20 and the blue light LED lamp beads 30 face the light incident face 401; the reflective sheet 50 is stacked on the lower bottom surface of the light guide plate 40; the quantum dot film material 60 is stacked on the top surface of the light guide plate 40.
In addition, in the present technical solution, the quantum dot film material 60 contains a plurality of red light quantum dots 601 and a plurality of green light quantum dots 602, and the plurality of red light quantum dots 601 and the plurality of green light quantum dots 602 are uniformly and alternately distributed.
In a preferred embodiment, the plurality of red light quantum dots 601 and the plurality of green light quantum dots 602 are staggered in multiple rows and multiple columns.
Based on the above, it can be understood that: the quantum dot backlight 1000 provided by the invention is mainly used as a backlight of a display device in practical implementation.
On one hand, the white light emitted by the plurality of white light LED lamp beads 20 arranged on the upper end surface of the strip-shaped PCB 10 is guided upward by the light guide plate 40 and then emitted upward from the top surface of the quantum dot film 60.
On the other hand, the blue light emitted by the plurality of blue light LED lamp beads 30 disposed on the lower bottom surface of the strip-shaped PCB 10 can be uniformly emitted into the quantum dot film material 60 after being uniformly guided upward by the light guide plate 40, so that the red light quantum dots 601 and the green light quantum dots 602 in the quantum dot film material 60 can be excited to correspondingly generate red light and green light, and then the corresponding blue light and the generated red light and green light are mixed to form white light and directly emitted upward from the upper top surface of the quantum dot film material 60.
Therefore, the invention can form two groups of uniformly mixed white light to be emitted together through two linear color lights of the white light source and the blue light source, thereby greatly improving the light emitting brightness of the white light, having good light effect and high white light conversion rate.
Furthermore, the invention has strong practicability, long service life and good use effect.
Preferably, in the present technical solution, the present invention further includes a light diffuser plate 70 stacked on the top surface of the quantum dot film 60 for guiding light upwards;
the top surface of the light diffusion plate 70 is formed into a sawtooth structure 701 or a wave-shaped structure.
Moreover, the thickness of the light diffusion plate 70 is 0.5mm-3.5mm, and the light diffusion plate 70 is made of a PC material with light diffusion performance.
The quantum dot backlight 1000 further includes a light diffuser 70 stacked on the top surface of the quantum dot film 60 for guiding light upward; the upper top surface of the light diffusion plate 70 is formed into a sawtooth structure 701 or a wave-shaped structure, so that the formed white light can be effectively scattered after passing through the upper top surface of the light diffusion plate 70 with the sawtooth structure 701 or the wave-shaped structure, and then effective light mixing can be achieved, and the chromaticity uniformity of the white light emitting light can be greatly improved.
Further, in specific implementation, the present invention further includes an isolation protection layer 80 disposed on the bottom surface of the quantum dot film 60 for isolating oxygen and moisture;
preferably, the isolation and protection layer 80 is provided with a grid-shaped heat conducting path 801, and the grid-shaped heat conducting path 801 is preferably any one of gold, graphene, silver, copper, polyaniline, polypyrrole, and polythiophene.
Therefore, the provided isolation and protection layer 80 can effectively isolate oxygen and moisture from contacting the quantum dot film material 60, so that the quantum dot film material 60 is not affected to fail, and the isolation and protection layer 80 is provided with the latticed heat conduction circuit 801, so that heat generated by the quantum dot film material 60 can be effectively conducted outwards, and the service life of the quantum dot film material 60 is longer.
Therefore, the using effect of the invention can be effectively improved.
Example two
Shown in fig. 1, 2, 3 and 4 in combination with fig. 5, 6, 7 and 8;
the display device 2000 provided by the invention for solving the problems of the prior art comprises a rear shell 90, a face cover 100 with a window in the middle, a liquid crystal panel 110 and the quantum dot backlight source 1000;
the rear housing 90 includes a metal housing 901 with an open top, and an inner adhesive protection layer a902 injection-molded on the inner surface of the metal housing 901; a plurality of positioning holes 9021 are uniformly formed in the inner glue protection layer a902 in a downward direction, and a containing groove 9022 for containing the quantum dot backlight source 1000 is formed in the inner glue protection layer a902;
the surface cover 100 includes a metal cover 1001 and an inner glue protection layer B1002 injected on the inner surface of the metal cover 1001; a plurality of positioning protrusions 10021 opposite to the positioning holes 9021 at corresponding positions are arranged on the lower periphery of the inner glue protection layer B1002 in a downward protruding mode close to the outer side of the lower periphery, and a circle of concave steps 10022 for clamping and fixing the liquid crystal panel 110 are formed on the lower periphery of the inner glue protection layer B1002 in an upward concave mode close to the inner side of the lower periphery;
meanwhile, the quantum dot backlight source 1000 comprises a strip-shaped PCB circuit board 10, a plurality of white light LED lamp beads 20 uniformly arranged on the upper end surface of the strip-shaped PCB circuit board 10, a plurality of blue light LED lamp beads 30 uniformly arranged on the lower bottom surface of the strip-shaped PCB circuit board 10, a light guide plate 40, a reflector plate 50 and a quantum dot film material 60; one side surface of the light guide plate 40 is a light incident surface 401, and the upper top surface is a light emitting surface 402; the strip-shaped PCB 10 abuts against one side face of the light guide plate 40, so that the light emitting directions of the white light LED lamp beads 20 and the blue light LED lamp beads 30 face the light inlet face 401; the reflective sheet 50 is stacked on the lower bottom surface of the light guide plate 40; the quantum dot film material 60 is stacked on the top surface of the light guide plate 40.
When the front cover 100 covers the rear case 90, the positioning protrusions 10021 are correspondingly clamped in the positioning holes 9021, so that the liquid crystal panel 110 and the quantum dot backlight 1000 can be fixed together.
In addition, in this technical solution, the quantum dot film material 60 contains a plurality of red light quantum dots 601 and a plurality of green light quantum dots 602, and the plurality of red light quantum dots 601 and the plurality of green light quantum dots 602 are uniformly and alternately distributed.
Preferably, the plurality of red light quantum dots 601 and the plurality of green light quantum dots 602 are distributed in a staggered manner in multiple rows and multiple columns.
Based on the above, it can be understood that: the present invention provides a display device 2000, which is improved over the conventional display device in the implementation.
On one hand, the white light emitted by the plurality of white light LED lamp beads 20 arranged on the upper end surface of the strip-shaped PCB 10 is guided upward by the light guide plate 40 and then emitted upward from the top surface of the quantum dot film 60.
On the other hand, the blue light emitted by the plurality of blue light LED lamp beads 30 disposed on the lower bottom surface of the strip-shaped PCB 10 can be uniformly emitted into the quantum dot film material 60 after being uniformly guided upward by the light guide plate 40, so that the red light quantum dots 601 and the green light quantum dots 602 in the quantum dot film material 60 can be excited to correspondingly generate red light and green light, and then the corresponding blue light and the generated red light and green light are mixed to form white light and directly emitted upward from the upper top surface of the quantum dot film material 60.
Therefore, the invention can form two groups of uniformly mixed white light to be emitted together through two linear color lights of the white light source and the blue light source, so that the light emitting brightness of the white light can be greatly improved, and then the display brightness of the liquid crystal panel 110 of the display device 2000 with the quantum dot backlight source provided by the invention can be greatly improved, so that the light efficiency is good, and the white light conversion rate is high.
Preferably, in this embodiment, the present invention further includes a light diffusing plate 70 stacked on the top surface of the quantum dot film 60 for guiding light upward;
the top surface of the light diffusion plate 70 is formed into a sawtooth structure 701 or a wave-shaped structure.
Moreover, the thickness of the light diffusion plate 70 is 0.5mm-3.5mm, and the light diffusion plate 70 is made of a PC material with light diffusion performance.
The quantum dot backlight 1000 of the display device 2000 provided by the present invention further includes a light diffuser 70 stacked on the top surface of the quantum dot film 60 for guiding light upwards; the upper top surface of the light-diffusing plate 70 is formed into a sawtooth structure 701 or a wave-shaped structure, so that the formed white light can be effectively scattered after passing through the sawtooth structure 701 or the wave-shaped structure on the upper top surface of the light-diffusing plate 70, and then effective light mixing can be achieved, and the chromaticity uniformity of the white light emitting light can be greatly improved.
Further, in specific implementation, the present invention in this embodiment further includes an isolation protection layer 80 disposed on the bottom surface of the quantum dot film 60 for isolating oxygen and moisture;
preferably, the isolation and protection layer 80 is provided with a grid-shaped heat conducting path 801, and the grid-shaped heat conducting path 801 is preferably any one of gold, graphene, silver, copper, polyaniline, polypyrrole, and polythiophene.
Therefore, the provided isolation protection layer 80 can effectively isolate oxygen and moisture from contacting the quantum dot film material 60, so that the quantum dot film material 60 is not affected to fail, and the isolation protection layer 80 is provided with the latticed heat conducting circuit 801, so that heat generated by the quantum dot film material 60 can be effectively conducted outwards, and the service life of the quantum dot film material 60 is longer.
Therefore, the using effect of the invention can be effectively improved.
It should be added that, in a specific implementation, in a preferred embodiment of the present invention, the size of the reflective sheet 50 is completely the same as the size of the light guide plate 40, and the size of the quantum dot film 60, the light diffuser plate 70 and the isolation protection layer 80 are completely the same; the widths of the quantum dot film material 60, the light diffusion plate 70 and the isolation protection layer 80 are all equal to the sum of the width of the light guide plate 40 and the width of the strip-shaped PCB 10; the lengths of the quantum dot film material 60, the light diffusing plate 70 and the isolation protection layer 80 are all equal to the length of the light guide plate 40.
Therefore, in the present technical solution, the size of the receiving slot 9022 is completely the same as the size of the quantum dot film material 60, the light diffuser plate 70, and the isolation protection layer 80.
In view of this, in a specific implementation, a strip-shaped boss 9023 having a size identical to that of the strip-shaped PCB 10 is formed by inward protruding a groove wall of a lower portion of the receiving groove 9022 of the inner glue protection layer a902 of the rear case 90 along a length direction of the receiving groove 9022, the strip-shaped boss 9023 and the inner glue protection layer a902 are integrally formed, and a first receiving groove 90231 for receiving the strip-shaped PCB 10, a plurality of second receiving grooves 90232 communicated with the first receiving groove 90231 for receiving the plurality of white LED beads 20 correspondingly, and a plurality of third receiving grooves 90233 communicated with the first receiving groove 90231 for receiving the plurality of blue LED beads 30 correspondingly are formed along the length direction of the strip-shaped boss 9023; the height of the elongated boss 9023 is equal to the sum of the thickness of the light guide plate 40 and the thickness of the reflector 50.
Therefore, when the present invention is assembled, the strip-shaped PCB 10 may be fixed to the first slot 90231, the plurality of white LED beads 20 may be fixed to the second slot 90232, the plurality of blue LED beads 30 may be fixed to the third slot 90233, and the stacked light guide plate 40 and the reflector 50 may be accommodated to the lower portion of the accommodating slot 9022; the stacked quantum dot film 60, light diffuser 70, and isolation protection layer 80 may be limited to be received at the upper portion of the receiving slot 9022, and pressed and fixed by the liquid crystal panel 110.
Then, the internal components of the display device 2000 have good fixing performance and mounting stability, so that the internal components cannot be displaced and loosened, and the internal components have compact mounting structure, and the overall structure of the display device 2000 is small and exquisite, so that the waste of materials is avoided.
Meanwhile, in specific implementation, the outer wall of the metal casing 901 is provided with a wire passing groove 9011 penetrating through the accommodating groove 9022, the position of the wire passing groove 9011 is preferably close to the strip-shaped PCB circuit board 10 so as to externally connect signal lines to the strip-shaped PCB circuit board 10, and after the signal lines are externally connected to the strip-shaped PCB circuit board 10 through the wire passing groove 9011, the wire passing groove 9011 can be plugged by using liquid glue, so that light leakage can be effectively prevented.
Furthermore, the using effect of the invention can reach the best.
Other embodiments, etc., will not be described herein.
In conclusion, the invention has the advantages of simple integral structure, easy implementation, easy operation, strong practicability, strong specificity and low manufacturing cost, does not need to increase too much cost in structural improvement and technical improvement, ensures that the invention has very good market popularization value and can be popularized effectively.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A quantum dot backlight, characterized in that: the LED lamp comprises a strip-shaped PCB (printed circuit board), a plurality of white LED lamp beads uniformly arranged on the upper end surface of the strip-shaped PCB, a plurality of blue LED lamp beads uniformly arranged on the lower bottom surface of the strip-shaped PCB, a light guide plate, a reflector plate and a quantum dot film material;
one side surface of the light guide plate is a light incident surface, and the upper top surface of the light guide plate is a light emergent surface; the strip-shaped PCB circuit board is abutted against one side face of the light guide plate, so that the light emitting directions of the white light LED lamp beads and the light emitting directions of the blue light LED lamp beads face the light inlet face; the reflecting sheet is stacked on the lower bottom surface of the light guide plate; the quantum dot film material is laminated on the upper top surface of the light guide plate;
the isolation protective layer is arranged on the lower bottom surface of the quantum dot film material and is used for isolating oxygen and moisture; the isolation protection layer is provided with a latticed heat conducting circuit, and the latticed heat conducting circuit is any one of gold, graphene, silver, copper, polyaniline, polypyrrole or polythiophene;
the quantum dot film material contains a plurality of red light quantum dots and a plurality of green light quantum dots, and the red light quantum dots and the green light quantum dots are uniformly and alternately distributed.
2. The quantum dot backlight of claim 1, wherein: the plurality of red light quantum dots and the plurality of green light quantum dots are distributed in a staggered mode in a multi-row and multi-column mode.
3. The quantum dot backlight of claim 2, wherein: the light diffusion plate is laminated on the upper top surface of the quantum dot film material and used for guiding light upwards; the upper top surface of the light diffusion plate is formed into a sawtooth structure or a wave-shaped structure.
4. A display device, characterized in that: comprises a rear shell, a face cover with a window in the middle, a liquid crystal panel and the quantum dot backlight source as claimed in claim 1;
the rear shell comprises a metal shell with an open upper end and an inner adhesive protection layer A injected on the inner surface of the metal shell; a plurality of positioning holes are uniformly formed in the upper peripheral edge of the inner glue protection layer A downwards, and a containing groove for placing the quantum dot backlight source is formed in the inner glue protection layer A;
the surface cover comprises a metal cover body and an inner adhesive protection layer B which is injected on the inner surface of the metal cover body; a plurality of positioning protrusions corresponding to the positioning holes at corresponding positions are arranged on the lower peripheral edge of the inner glue protection layer B in a downward protruding mode close to the outer side of the lower peripheral edge of the inner glue protection layer B, and a circle of concave steps used for clamping and fixing the liquid crystal panel are formed on the lower peripheral edge of the inner glue protection layer B in an upward concave mode close to the inner side of the lower peripheral edge of the inner glue protection layer B;
when the face cover is covered on the rear shell, the positioning protrusions are correspondingly clamped in the positioning holes, so that the liquid crystal panel and the quantum dot backlight source are fixed into a whole.
5. The display device according to claim 4, wherein: the plurality of red light quantum dots and the plurality of green light quantum dots are distributed in a staggered mode in a multi-row and multi-column mode.
6. The display device according to claim 5, wherein: the light diffusion plate is laminated on the upper top surface of the quantum dot film material and used for guiding light upwards; the upper top surface of the light diffusion plate is formed into a sawtooth structure or a wave-shaped structure.
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| CN112596302A (en) * | 2020-12-17 | 2021-04-02 | 广州易博士管理咨询有限公司 | Low-power-consumption reflection screen color enhancement method and system |
| CN112835225A (en) * | 2021-03-17 | 2021-05-25 | 维沃移动通信有限公司 | Touch display device and electronic equipment |
| CN116364815A (en) * | 2021-06-23 | 2023-06-30 | 安徽省东超科技有限公司 | Quantum dot unit processing method |
| CN115598887A (en) * | 2022-11-04 | 2023-01-13 | 安徽芯瑞达科技股份有限公司（Cn） | Improve ultra-thin Mini LED backlight of polycrystal COB of colour gamut |
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