CN107608128A - A kind of LCD backlight component of high efficiency quantum dot film - Google Patents
A kind of LCD backlight component of high efficiency quantum dot film Download PDFInfo
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- CN107608128A CN107608128A CN201710652332.1A CN201710652332A CN107608128A CN 107608128 A CN107608128 A CN 107608128A CN 201710652332 A CN201710652332 A CN 201710652332A CN 107608128 A CN107608128 A CN 107608128A
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Abstract
The invention provides a kind of LCD backlight component of high efficiency quantum dot film, it is characterised in that light source sends the first primary lights of first wave length scope；First primary lights are first coupled to the first fluorescence transition material, and a part of first primary lights therein are converted into the second primary lights of second wave length scope；The mixed light of second primary lights of remaining first primary lights sum is then by an optically coupled device to the second fluorescence transition material, a part of first primary lights therein are converted into wavelength range three primary colours light, optically coupled device is used to the first and second primary lights being coupled to the second fluorescence transition material from the first fluorescence transition material, while reduces or prevent three primary colours light from returning to the first fluorescence transition material from the second fluorescence transition material.The present invention can be effectively reduced or avoided from blue light to green light again to indirect conversion as red light, so as to improve the overall quantum efficiency of quantum dot light converting system, reduce the energy consumption of LCD backlight component.
Description
Technical field
The present invention relates to LCD backlight technical field, more particularly to LCD backlight component.
Background technology
Colour liquid crystal display device turns into a kind of product ubiquitous in daily life and industrial production, associated
Various standards and technology also in continuous upgrading, such as the BT2020 standards recommended of ITU-R screen resolution ratio,
The higher standard all fixed on frame rate, color-resolution, promote the continuous progress of the technology of correlation.Wherein technology of quantum dots
As a technology that liquid crystal display color rendering effect can be substantially improved, the very big concern of industrial circle, phase are caused
Product is closed also to have begun to enter market.
Quantum dot is the nano level crystal grain of semi-conducting material, and typically with nucleocapsid structure, its energy level is by its geometry
The influence of form and change, thus the size of quantum dot core and shell can be controlled by changing the synthesis condition of quanta point material
And then it is controlled to send the light of different colours in excited target；For the quantum dot of identical material, size is bigger, issued light
Wavelength it is longer.Shooting condition can substantially be divided into luminescence generated by light and electroluminescent.The current comparative maturity of photoluminescent techniques, efficiency
Also it is higher.The method of luminescence generated by light is primarily used in the backlight assembly of liquid crystal display at present, and in general way is to send out
After the quantum dot of red light and the quantum dot of glow green mix according to a certain percentage, the diverse location of backlight assembly is placed in：Such as
Shown in Fig. 1 a, it is dispersed in the film on light guide plate or diffuser plate；Or as shown in Fig. 1 b, in this side entrance back
It is placed in structure in the elongated transparent glass tube or plastic tube between the edge of light guide plate and Light-Emitting Diode；Or such as Fig. 1 c
It is shown, it is placed in this downward back photo structure in the lampshade above light emitting diode or cover surface；Or such as Fig. 1 d institutes
Show, be placed on the chip of light emitting diode.Selected regardless of backing structure, the operation principle of quantum dot is essentially the same：Light
The blue primary color light that source is sent, when by red and green quantum dot mixture, a part of blue light is converted into red
Light and green light, white light is mixed to form with remaining blue light.
Transformation efficiency between different wave length is mainly influenceed by two factors, and one is internal quantum, and one is
The absorption efficiency of light.Quantum efficiency is influenceed by factors such as crystal defect, surface ligands, is closed generally by quantum dot is improved
Improved into technique.It is reported that some research groups can accomplish the quantum efficiency of CdSe quantum dots close to 70%, but
Due to the consideration of the factors such as cost, the quantum efficiency for the quanta point material being commonly used in display backlight component is 60% to 85%
Between.
Fig. 2 a show absorption collection of illustrative plates of the cadmium selenide green quanta point material to the light of different wave length, and Fig. 2 b are cadmium selenide reds
Absorption collection of illustrative plates of the color quantum dot to the light of different wave length.For the quantum dot of red, the light that can not only absorb blueness turns
Red light is melted into, the light that the green light sent by green quantum dot changes into red can also be absorbed；That is this exists
In red quantum dot and the mixed uniformly system of green quantum dot, the red light sent has two paths：One is by indigo plant
Coloured light directly converts, and one is that blue light light first changes into green light and is then converted into red light.Green quantum dot absorbs blueness
The intensity of the green light given off after exciting light in all directions is identical, and this also causes green light in quanta point material
Light path increase in system, is further increased therewith by the chance that red quantum dot absorbs.Result caused by so is at this
The green light and quilt that quite a few green quantum dot is sent in the mixed system of kind red quantum dot and green quantum dot
It is converted into the light of red.If green and the quantum efficiency of red quantum dot are all 80%, then for this path of the latter,
Equivalent quantum efficiency from blue light to red light will be reduced to 64%, so as to tie down the reduction of the quantum efficiency of whole system.
In addition, quanta point material can be divided into containing cadmium and without the major class of cadmium two.Up to the present, cadmium is contained using cadmium selenide as representative
Quanta point material quantum efficiency, half-peak breadth, stability, cost etc. it is many-sided all than workable in the market without cadmium quantum dot material
Material has greater advantage.Yet with worry to negative effect of the cadmium element to environment, countries in the world all start or will be to materials
Middle cadmium content is strictly controlled.This using the quantum dot product containing cadmium for proposing new challenge.The Nanosys in the U.S. is
Reduce the cadmium content in quantum dot system, red quantum dot containing cadmium originally replaced with the red quantum dot without cadmium, with containing
The new system that the green quantum dot of cadmium is mixed to form, system cadmium content so can be both reduced to a certain extent, can be protected again
Hold better than the entirely performance without cadmium material.Red light can be converted into yet with preceding sections green light, actual red
In the mixed system of green quantum dot, the ratio of green quantum dot usage amount and red quantum dot usage amount, which is significantly more than only pressed, to be absorbed
The ratio of the green quantum dot usage amount that constant and quantum efficiency are calculated and red quantum dot usage amount, up to 6:1 even
7:1.So the space of the reduction of cadmium content is restricted.
The content of the invention
, can be with the invention provides the scheme of a kind of highly efficient quantum dot film and corresponding LCD backlight component
The phototranstormation efficiency of quantum dot fluorescence material is improved simultaneously, reduces the content of cadmium, and obtain wider array of colour gamut area coverage.
Specifically the present invention is a kind of LCD backlight component of high efficiency quantum dot film, it is characterised in that light source,
First fluorescence transition material, the second fluorescence transition material and optically coupled device；The light source sends the first of first wave length scope
Primary lights；First primary lights are first coupled to the first fluorescence transition material, and a part of first primary lights therein are converted into
Second primary lights of two wave-length coverages；Then the mixed light of second primary lights of remaining first primary lights sum passes through an optocoupler
Attach together to put to the second fluorescence transition material, a part of first primary lights therein and be converted into wavelength range three primary colours light,
The optically coupled device is used to the first and second primary lights being coupled to the second fluorescence transition material from the first fluorescence transition material,
Reduce simultaneously or prevent three primary colours light from returning to the first fluorescence transition material, second primary colours from the second fluorescence transition material
The wavelength of light is more than the wavelength of three primary colours light；The wavelength of three primary colours light is more than the wavelength of the first primary lights.
Wherein described light source includes but is not limited to light emitting diode；
The fluorescence transition material includes but is not limited to quanta point material and fluorescent material.
The quanta point material includes but is not limited to silicon, germanium, tin, selenium, tellurium, boron, carbon, phosphorus, cobalt, gold, boron nitride, phosphatization
Boron, arsenic boron, aluminium nitride, aluminum phosphate, aluminium arsenide, aluminium antimonide, gallium nitride, gallium phosphide, GaAs, gallium antimonide, indium nitride, phosphatization
Indium, indium arsenide, indium antimonide, zinc oxide, zinc sulphide, zinc selenide, zinc telluridse, cadmium sulfide, cadmium selenide, cadmium telluride, mercuric sulphide, selenizing
Mercury, telluride mercury, vulcanize beryllium, selenizing beryllium, telluride beryllium, magnesium sulfide, magnesium selenide, germanium sulfide, Germanium selenide, telluride germanium, artificial gold, selenizing
Tin, telluride tin, lead oxide, vulcanized lead, lead selenide, lead telluride, phosphorized copper, copper chloride, copper bromide, cupric iodide, silicon nitride, nitridation
Germanium, aluminum oxide,（Aluminium, gallium, indium）2,（Sulphur, selenium, tellurium）3, char combustion aluminium, one or more combination therein.The quantum
Point is core/shell structure, including but not limited to cadmium selenide/zinc sulphide, indium phosphide/zinc sulphide, indium phosphide/zinc selenide, lead selenide/sulphur
Change lead, cadmium selenide/cadmium sulfide, cadmium telluride/cadmium sulfide, cadmium telluride/zinc sulphide, etc..
The quanta point material further comprises perovskite quanta point material；The perovskite includes caesium lead halide calcium titanium
Ore deposit, in CsPbX3, wherein X is chlorine, bromine, iodine or their mixture.The perovskite quantum dot can be core/shell structure.
The fluorescent material includes but is not limited to silicate, garnet, aluminate, nitride, NYAG, rear-earth-doped silicon substrate
Nitride or nitrogen oxides, or the one or more therein such as fluorescent material of fluoride.Wherein described fluoride fluorescent material bag
Containing A2 (MF6)：The compound of one type of Mn4+ structural formula formulas, wherein A are Li, Na, K, Rb, Cs, the one of NH4
Kind, and one kind of the Ge that M is, Si, Sn, Ti, Zr element, or element combinations.
Wherein described first wave length scope is 430 to 470 nanometers；Second wave length scope is 67 to 660 nanometers；3rd wavelength
Scope is 500 to 560 nanometers.In order to describe simplicity, the first primary lights of our first wave length scopes are referred to as blue light, the second ripple
Second primary lights of long scope are red light, and the three primary colours light of wavelength range is green light；For being sent after being stimulated
The quanta point material or fluorescent material of red light, referred to as red quantum dot or red fluorescence powder, or be referred to as red fluorescence material, or
First fluorescence transition material；Quanta point material or fluorescent material for sending green after being stimulated, referred to as green quantum dot or green
Color fluorescent material, or green fluorescent material is referred to as, or the second fluorescence transition material.
The first fluorescence transition material is dispersed in a film, and this film is located above light guide plate or diffuser plate,
The cadmium content of this film is less than 70ppm；Or the first fluorescence transition material is encapsulated in a transparent glass tube or modeling
In expects pipe, this glass tube or plastic tube are located between the edge and light emitting diode of light guide plate；Or the first fluorescence conversion
Material is located in the lampshade in front of light emitting diode or cover surface；Or the first fluorescence transition material is located at light-emitting diodes
On die.
The second fluorescence transition material is dispersed in a film, and this film is located above light guide plate or diffuser plate,
The cadmium content of this film is less than 70ppm；Or the second fluorescence transition material is encapsulated in a transparent glass tube or modeling
In expects pipe, this glass tube or plastic tube are located between the edge and light emitting diode of light guide plate；Or the second fluorescence conversion
Material is located in the lampshade in front of light emitting diode or cover surface.
The optically coupled device is a kind of dichronic mirror, alternately folded for the film of two kinds of refractive indexes of 1/4 optical wavelength by thickness
The film formed together.
Put a piece of Double Brightness Enhancement Film above the second fluorescence transition material, the Double Brightness Enhancement Film be used to allowing polarization direction with
Shake the vertical light back into backlight component in direction.
The present invention has the beneficial effect that：The present invention can be effectively reduced or avoided from blue light to green light again to red light
Such indirect conversion, so as to improve the overall quantum efficiency of quantum dot light converting system, reduce LCD backlight component
Energy consumption.
Further, since green light, which has been reduced or avoided, is converted to red light, with traditional by red quantum dot and green
The scheme of quantum dot mixing is compared, and when the red light and green light that produce equivalent, required green quantum dot is reduced, red quantum
Point increases.So, when the cadmium content point material of red is substituted without cadmium quanta point material, more cadmiums can be taken
In generation, it reduce further the content of cadmium in system.
Brief description of the drawings
Fig. 1 a are the structural representation of the first implementation of prior art；
Fig. 1 b are the structural representation of second of implementation of prior art；
Fig. 1 c are the structural representation of the third implementation of prior art；
Fig. 1 d are the structural representation of the 4th kind of implementation of prior art；
Fig. 2 a are absorption collection of illustrative plates of the cadmium selenide red quantum dot material to the light of different wave length；
Fig. 2 b are absorption collection of illustrative plates of the cadmium selenide green quantum dot to the light of different wave length；
Fig. 3 a are the schematic diagram of the first placement location of the fluorescence transition material of the present invention；
Fig. 3 b are the schematic diagram of second of placement location of the fluorescence transition material of the present invention；
Fig. 3 c are the schematic diagram of the third placement location of the fluorescence transition material of the present invention；
Fig. 3 d are the schematic diagram of the 4th kind of placement location of the fluorescence transition material of the present invention；
Fig. 4 a are the structural representation of one embodiment of the present invention；
Fig. 4 b are the structural representation of the optically coupled device of the present invention；
Fig. 4 c are transmitance of the optically coupled device to different wave length of the present invention；
Fig. 5 is the structural representation of another embodiment of the invention；
Fig. 6 is the structural representation of another embodiment of the invention；
Fig. 7 is the structural representation of another embodiment of the invention；
Fig. 8 is the structural representation of another embodiment of the invention；
Fig. 9 is the structural representation of another embodiment of the invention；
Figure 10 is the structural representation of another embodiment of the invention.
Embodiment
The present invention is described in more detail below with reference to accompanying drawings, which show the preferred embodiments of the present invention,
It should be appreciated that those skilled in the art can change invention described herein and still realize the advantageous effects of the present invention.Cause
This, description below is appreciated that for the widely known of those skilled in the art, and is not intended as limitation of the present invention.
In figure, 1, light source；2nd, the first fluorescence transition material；3rd, the second fluorescence transition material；4th, light guide plate；5th, diffuser plate；
6th, transparent glass tube；7th, lampshade；8th, optically coupled device；9th, reflector；10th, double blast moulds.
This LCD backlight component includes light source 1, the first fluorescence transition material 2, the second fluorescence transition material 3 and optocoupler
Attach together and put 9；The light source 1 sends the first primary lights of first wave length scope；First primary lights are first coupled to the first fluorescence
Transition material 2, a part of first primary lights therein are converted into the second primary lights of second wave length scope；Remaining first primary colours
The mixed lights of second primary lights of light sum and then pass through the fluorescence of optically coupled device 8 to the second transition material 3, one therein
The first primary lights are divided to be converted into wavelength range three primary colours light, the optically coupled device 8 is used for the first and second primary colours
Light is coupled to the second fluorescence transition material 3 from the first fluorescence transition material 2, while reduces or prevent three primary colours light glimmering from second
Light-converting material 3 returns to the first fluorescence transition material 2, and the wavelength of second primary lights is more than the wavelength of three primary colours light；
The wavelength of three primary colours light is more than the wavelength of the first primary lights.
Wherein described first fluorescence transition material 2 as shown in Figure 3 a, is dispersed in above light guide plate 4 or diffuser plate 5
In film；Or as shown in Figure 3 b, elongated transparent glass tube 6 or plastics between the edge of light guide plate 4 and light emitting diode 1
Guan Zhong；Or as shown in Figure 3 c, it is placed in this downward back photo structure in the lampshade 7 above light emitting diode 1 or the table of lampshade 7
Face；Or as shown in Figure 3 d, it is placed on the chip of light emitting diode 1.Wherein described second fluorescence transition material 3 such as Fig. 3 a institutes
Show, be dispersed in the film above light guide plate 4 or diffuser plate 5；Or as shown in Figure 3 b, positioned at the edge of light guide plate 4 and hair
Between optical diode 1 in elongated transparent glass tube 6 or plastic tube；Or as shown in Figure 3 c, in this downward back photo structure
It is placed in the lampshade 7 above light emitting diode 1 or the surface of lampshade 7.Lampshade 7 can use lens.
The light source 1 can be light emitting diode, and the first fluorescence transition material 2, the second fluorescence transition material 3 include
But it is not limited to quanta point material and fluorescent material.In the following embodiments, the first fluorescence transition material 2, which plays, changes out feux rouges
Effect, the second fluorescence transition material 3 play a part of changing out red-green glow.
Embodiment 1
As shown in fig. 4 a, the blue light that light emitting diode 1 is sent can be from the edge of light guide plate 4 or the lower section of diffuser plate 5
Introduce；Red quantum dot 2 is dispersed in the first layer film on light guide plate 4, and green quantum dot 3 is dispersed in first layer
It is that one layer of optical coupling with specific function is thin between the first layer film and the second layer film in the second layer film on film
Film 8, optical coupling film 8 are characterized in reducing or prevented the green light that green quantum dot 3 is sent to return to the from the second layer film
Thin film.
Optically coupled device 8 can be film, and a kind of implementation method of optical coupling film is as shown in Figure 4 b, to utilize dichronic mirror
Principle, by thickness for 1/4 green optical wavelength two kinds of refractive indexes film alternately stack.The film of formation is to different ripples
As illustrated in fig. 4 c, 470 nanometers to 600 nanometers of green light light is all reflected long transmitance；Red light more than 600 nanometers
It can be passed through with uncrossed；Less than 470 nanometers of blue light is reflected by part, but the blue light reflected can be carried on the back
Optical assembly recycles, and will not waste.
Embodiment 2
As shown in figure 5, red fluorescent material 2 is located on the chip of light emitting diode 1, green quantum dot 3 is encapsulated in glass tube 6
In, glass tube 6 is placed between light emitting diode 1 and light guide plate 4, and one in the blue light that light-emitting diode chip for backlight unit 1 is sent
Part is converted to red light and the blend color formed with remaining blue light, and after glass tube 6, part blue light excites
Green quantum dot 2 is converted into green.
Embodiment 3
As shown in fig. 6, red fluorescent material 2 is located on the chip of light emitting diode 1, green quantum dot 3 is encapsulated in poly- methyl
In methyl acrylate lens 9, lens 9 cover on the surface of light emitting diode 1, in the blue light that the chip of light emitting diode 1 is sent
A part is converted to red light and the blend color formed with remaining blue light, after mixed light is by lens 9, part blueness
Light excites green quantum dot 3 to be converted into green.
Embodiment 4
As shown in fig. 7, red fluorescent material 2 is located on the chip of light emitting diode 1, the indigo plant that light-emitting diode chip for backlight unit 1 is sent
A part in coloured light is converted to the light of red light and the blend color formed with remaining blue light from the edge of light guide plate 4
Introduce.Green quantum dot 3 is dispersed in the film of the top of light guide plate 4.Green quantum dot excited by blue light send it is downward
The green light in direction is reflected back without returning to the position where the chip of light emitting diode 1 by the reflector 9 of the lower section of light guide plate 4
Put.
Described red fluorescence powder 2 is the potassium fluosilicate of fluorination matter fluorescent powder, more preferably tetravalence additive Mn.
Embodiment 5
As shown in figure 8, red fluorescent material 2 is located on the chip of light emitting diode 1, the indigo plant that the chip of light emitting diode 1 is sent
A part in coloured light is converted to red light and the light of the blend color formed with remaining blue light draws from the lower section of diffuser plate 5
Enter.Green quantum dot 3 is dispersed in the film of the top of diffuser plate 5.It is a lens between light emitting diode 1 and diffuser plate 5
7, the light that on the one hand light emitting diode 1 can be sent more uniformly is projected on diffuser plate 5, on the other hand can also be reduced
The light that green quantum dot 3 is sent returns to the position where the chip of light emitting diode 1.
Described red fluorescence powder 2 is the potassium fluosilicate of fluorination matter fluorescent powder, more preferably tetravalence additive Mn.
Embodiment 6
As shown in Figure 9 and Figure 10, that is, in figures 7 and 8, the top of the film containing green quantum dot, a piece of double increasings are placed
Bright film 10, this Double Brightness Enhancement Film 10 can with polarizer shake the vertical light in direction be not absorb but back into backlight component
In be changed and then can be re-used in order to the polarization direction of this part light.
In any liquid crystal display, uniform white light that backlight assembly is sent when entering liquid crystal panel all
One layer of polarizer can be passed through, regardless of color, the parallel light in the direction that only shaken with polarizer can be by with polarizer
The vertical light in direction that shakes, which is substantially all, to be absorbed.In order to improve the utilization rate of back light, the 3M companies exploitation in the U.S. this
Kind of Double Brightness Enhancement Film 10 can with polarizer shake the vertical light in direction be not absorb but in back into backlight component so as to
It is changed and then can be re-used in the polarization direction of this part light.But for by red quantum dot and green quantum dot
Mix by a certain percentage and be dispersed in light guide plate or diffuser plate on film in backlighting scheme, this part is reflected back
The green light that includes of light can be absorbed by the quantum dot of red and change into red light so that the pair of this secondary conversion
Effect is exaggerated, and counteracts the lifting of efficiency caused by Double Brightness Enhancement Film to a certain extent.The present invention method because
This secondary conversion is avoided, so that the effect of Double Brightness Enhancement Film 10 is more brought into play.Make in the present embodiment
Double Brightness Enhancement Film 10 is the company of 3M productions, model DBEF.
In addition, according to Beer-Lambert law, absorption coefficient is constant, in order to obtain identical absorb, the concentration of quantum dot and
Light path is inversely proportional.When due to the reflex of Double Brightness Enhancement Film so that light path of the blue light in green quantum dot film increases
Add, the concentration of so required green quantum dot also declines to a great extent.In the present embodiment, when the thickness of green quantum dot film is
At 300 microns, the actual cadmium content of quantum dot film can as little as 40ppm~50ppm, well below RoHs to highest in photoelectric material
The cadmium content 100ppm universal standard.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (13)
- A kind of 1. LCD backlight component of high efficiency quantum dot film, it is characterised in that including：Light source, the first fluorescence conversion material Material, the second fluorescence transition material and optically coupled device；The light source sends the first primary lights of first wave length scope；Described first Primary lights are first coupled to the first fluorescence transition material, and a part of first primary lights therein are converted into the second of second wave length scope Primary lights；The mixed light of second primary lights of remaining first primary lights sum is then by an optically coupled device to the second fluorescence Transition material, a part of first primary lights therein are converted into wavelength range three primary colours light, and the optically coupled device is used In the first and second primary lights are coupled into the second fluorescence transition material from the first fluorescence transition material, while reduce or prevent the Three primary colours light returns to the first fluorescence transition material from the second fluorescence transition material, and the wavelength of second primary lights is more than the 3rd The wavelength of primary lights；The wavelength of three primary colours light is more than the wavelength of the first primary lights.
- A kind of 2. LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that the light source For light emitting diode.
- A kind of 3. LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that the fluorescence Transition material includes but is not limited to quanta point material and fluorescent material.
- A kind of 4. LCD backlight component of high efficiency quantum dot film as claimed in claim 3, it is characterised in that the quantum Point material include but is not limited to silicon, germanium, tin, selenium, tellurium, boron, carbon, phosphorus, cobalt, gold, boron nitride, boron phosphide, arsenic boron, aluminium nitride, Aluminum phosphate, aluminium arsenide, aluminium antimonide, gallium nitride, gallium phosphide, GaAs, gallium antimonide, indium nitride, indium phosphide, indium arsenide, indium antimonide, Zinc oxide, zinc sulphide, zinc selenide, zinc telluridse, cadmium sulfide, cadmium selenide, cadmium telluride, mercuric sulphide, mercury selenide, telluride mercury, vulcanization beryllium, Selenizing beryllium, telluride beryllium, magnesium sulfide, magnesium selenide, germanium sulfide, Germanium selenide, telluride germanium, artificial gold, stannic selenide, telluride tin, lead oxide, Vulcanized lead, lead selenide, lead telluride, phosphorized copper, copper chloride, copper bromide, cupric iodide, silicon nitride, germanium nitride, aluminum oxide,（Aluminium, gallium, Indium）2、（Sulphur, selenium, tellurium）3Or one or more combinations in char combustion aluminium；The quantum dot is core/shell structure, including but not It is limited to cadmium selenide/zinc sulphide, indium phosphide/zinc sulphide, indium phosphide/zinc selenide, lead selenide/vulcanized lead, cadmium selenide/cadmium sulfide, tellurium Cadmium/cadmium sulfide, cadmium telluride/zinc sulphide.
- A kind of 5. LCD backlight component of high efficiency quantum dot film as claimed in claim 3, it is characterised in that the quantum Point material includes perovskite quanta point material；The perovskite includes caesium lead halide perovskite, and in CsPbX3, wherein X is chlorine, Bromine, iodine or their mixture；The perovskite quantum dot can be core/shell structure.
- 6. such as a kind of LCD backlight component of high efficiency quantum dot film of claim 3, it is characterised in that the fluorescent material bag Include but be not limited to silicate, garnet, aluminate, nitride, NYAG, rear-earth-doped silica-based nitride or nitrogen oxides, or The one or more therein such as the fluorescent material of person's fluoride；The fluorination matter fluorescent powder includes A2 (MF6)：Mn4+ structural formula formulas A type compound, wherein A is Li, Na, K, Rb, Cs, NH4 one kind, and the Ge that M is, Si, Sn, Ti, One kind of Zr elements, or the combination of element.
- 7. LCD screen backlight component as claimed in claim 1, wherein the first wave length scope is 430 to 470 nanometers；The Two wave-length coverages are 67 to 660 nanometers；Wavelength range is 500 to 560 nanometers.
- 8. the LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that first fluorescence Transition material is dispersed in a film, and this film is located above light guide plate or diffuser plate；Or the first fluorescence conversion Material is encapsulated in transparent a glass tube or plastic tube, and this glass tube or plastic tube are located at the edge of light guide plate and lighted Between diode；Or the first fluorescence transition material is located in the lampshade in front of light emitting diode or cover surface；Or The first fluorescence transition material is located on light-emitting diode chip for backlight unit.
- 9. the LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that second fluorescence Transition material is dispersed in a film, and this film is located above light guide plate or diffuser plate；Or the second fluorescence conversion Material is encapsulated in transparent a glass tube or plastic tube, and this glass tube or plastic tube are located at the edge of light guide plate and lighted Between diode；Or the second fluorescence transition material is located in the lampshade in front of light emitting diode or cover surface.
- 10. the LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that the optocoupler attaches together It is a kind of dichronic mirror to put, and alternately the film formed is stacked for the film of two kinds of refractive indexes of 1/4 optical wavelength by thickness.
- 11. the LCD backlight component of high efficiency quantum dot film as claimed in claim 1, it is characterised in that second fluorescence A piece of Double Brightness Enhancement Film is put above transition material, the Double Brightness Enhancement Film is used for the light reflection for making polarization direction vertical with the direction that shakes Return backlight assembly.
- 12. the LCD backlight component of high efficiency quantum dot film as claimed in claim 8, it is characterised in that the film contains Cadmium amount is less than 70ppm.
- 13. the LCD backlight component of high efficiency quantum dot film as claimed in claim 9, it is characterised in that the film contains Cadmium amount is less than 70ppm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319077A (en) * | 2018-02-08 | 2018-07-24 | 深圳市华星光电技术有限公司 | Quantum dot enhances film and preparation method thereof, quantum dot backlight module and display device |
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