CN106501888A - Optical film, and light-emitting device and display containing same - Google Patents

Optical film, and light-emitting device and display containing same Download PDF

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Publication number
CN106501888A
CN106501888A CN201610090037.7A CN201610090037A CN106501888A CN 106501888 A CN106501888 A CN 106501888A CN 201610090037 A CN201610090037 A CN 201610090037A CN 106501888 A CN106501888 A CN 106501888A
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CN
China
Prior art keywords
light
base material
blooming
emitting device
coloured light
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CN201610090037.7A
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Chinese (zh)
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CN106501888B (en
Inventor
伍清钦
吴宪宗
黄舜晖
吕英宗
李宛珊
唐世杰
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SIC TECH CO LTD
Efun Technology Co Ltd
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SIC TECH CO LTD
Efun Technology Co Ltd
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Publication of CN106501888A publication Critical patent/CN106501888A/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles

Abstract

An optical film, a light-emitting device and a display containing the optical film are provided, wherein the optical film comprises a first substrate, a second substrate and a scattering layer, the scattering layer comprises a plurality of quantum dots and a plurality of scattering particles, and the quantum dots can emit second color light with a wavelength larger than that of the first color light after being excited by the first color light. The light-emitting device comprises the optical film and a light-emitting module, wherein the light-emitting module is positioned on one side of the first base material and can emit the first color light, the first color light enters the scattering layer and excites the quantum dots to emit the second color light, and the light with different colors is emitted by the second base material after being mixed. The display comprises the light-emitting device and a panel, wherein the panel is positioned at one side of the light-emitting device and generates an optical effect by means of light emitted by the light-emitting device so as to present an image. The optical film promotes the light path of the first colored light on the scattering layer by means of scattering particles, and excites more quantum dots to achieve the purpose of wide color gamut.

Description

Blooming, and the light-emitting device and display containing the blooming
Technical field
The present invention relates to a kind of blooming and light-emitting device and display containing the blooming, special It is not to be related to a kind of blooming that can lift colour gamut and containing the blooming and with wide colour gamut Light-emitting device and display.
Background technology
Existing light emitting diode (light emitting diode, LED) light-emitting device produces white light One way in which be by the use of quantum dot (quantum dots) as the luminous of light emitting diode Layer, the quantum dot by different materials or particle diameter are irradiated by excitation source, are sent and are different from swashing The secondary light ray back mixing light of the wavelength of light emitting source and obtain.For example, be mostly using blue light as Excitation source, and the quanta point material of different-grain diameter is excited to produce ruddiness and green glow, then just Ruddiness, green glow, and blue light can be formed white light in the way of mixed light.
However, the existing illumination mode for producing white light with blue light or ultraviolet excitation, which is present The disadvantage is that, the optical spectrum of white light assumes continuous distributed, thus overall colour purity can be caused Degree reduces, when the LED illuminating device to be applied to a display as backlight When, the color expression range (colour gamut) of the display will be caused to reduce, the actual color in part Cannot present.Also, colour gamut (color gamut) is the number of colors that the display can be expressed The range areas for being constituted, that is, its color gamut that can show, and this color gamut is The triangle area surrounded by the coordinate of red (R), green (G), blue (B) three kinds of pure colors, triangle Area bigger represent that gamut range is wider, the performance of wider display its color of colour gamut is more Abundant also more true.
In other words, affect the display color gamut to assume one of principal element of ability to be to carry on the back The selection of light source, the backlight of high colour gamut, the color is presented by the display can more horn of plenty, Can closer to object itself color and in bright gay color, the backlight of low colour gamut, then can make this show Show that the color is presented by device produces deviation, and the actual color of object cannot be shown completely.? That is, the quality of display color gamut can directly affect judgement of the human eye to object color, Therefore, for the angle of user, the display of wide colour gamut all has height all the time The market demand.
For these reasons, a kind of blooming that can lift colour gamut is further developed or designs, and It is applied to light-emitting device and display, makes the display that there is excellent color representation, with Meet the market demand, and then lift economic worth, be the important goal for present invention research improvement.
Content of the invention
It is an object of the invention to provide a kind of blooming.
Blooming of the present invention includes the first base material, second base material, and one layer of scattering layer. Second base material is relative with the first base material interval, the scattering layer be located at the first base material with this Between two base materials, and containing several quantum dots and several scattering particles, the quantum dot is in acceptance one After individual first coloured light is excited, second color of the wavelength more than the wavelength of first coloured light is sent Light.
It is preferred that aforementioned optical film, first coloured light can also excite the quantum dot to send one Three coloured light of the wavelength more than the wavelength of first coloured light, first coloured light is blue light, and this second Coloured light is ruddiness with the one of which of the three coloured light, and another one is green glow.
It is preferred that aforementioned optical film, the particle diameter of the quantum dot is between 1nm to 50nm, institute The particle diameter of scattering particles is stated between 1nm to 10 μm.
It is preferred that aforementioned optical film, each scattering particles has and is coated on its surface extremely Few layer of gel layer, and the constituent material of the gel layer is selected from polymethyl methacrylate, silica Resin, urethane, polyurethane rubber, polypropylene, or an aforesaid combination.
It is preferred that aforementioned optical film, the constituent material of the scattering particles selected from silica, Titanium dioxide, germanium dioxide, zirconium dioxide, alundum (Al2O3), or an aforesaid combination.
It is preferred that aforementioned optical film, the first base material has first face of contrary with one Incidence surface, and several the first micro-structurals positioned at the incidence surface, second base material have a court The second face, an exiting surface in contrast to second face to first face, and several positioned at this Second micro-structural of exiting surface, and the scattering layer is positioned between first face and second face;This A shade passes through the scattering layer, and going out by second base material via the incidence surface of the first base material Project in light face.
It is preferred that aforementioned optical film, the shape of first micro-structural and second micro-structural For taper, semicircle, regular hexagon, irregular concaveconvex structure, or an aforesaid combination.
It is preferred that aforementioned optical film, the height that first micro-structural protrudes from the incidence surface is 5 μm to 25 μm, it is 1 μm to 20 that second micro-structural protrudes from the height of the exiting surface μm.
Another object of the present invention is to providing a kind of light-emitting device containing the blooming.
Light-emitting device of the present invention includes an aforesaid blooming, and a light emitting module.This Optical module is located at the side of the first base material, and sends first coloured light, first coloured light via The first base material enters the scattering layer, and excite the quantum dot send the wavelength more than this first Second coloured light of the wavelength of coloured light, the white light are projected by second base material after mixed light.
A further object of the present invention is to provide a kind of display containing the light-emitting device.
Inventive display includes an aforesaid light-emitting device, and a panel.The panel position In the side of the blooming of the light-emitting device, and the light sent by the light-emitting device produces light Learn effect and assume image.
The beneficial effect of the present invention is:A kind of novel blooming is provided, contains the optics The light-emitting device of film, and the display containing the light-emitting device, the blooming is by the scattering Particle lifts first coloured light in the light path of the scattering layer, and increases the quantum dot and be excited Probability, and then the luminous intensity of the white light is more preferably evenly distributed, is contained with making The light-emitting device of the blooming and the display containing the light-emitting device can reach wide colour gamut Purpose.
Description of the drawings
Fig. 1 is a sectional view, and a first embodiment of light-emitting device of the present invention is described;
Fig. 2 is a sectional view, and a second embodiment of light-emitting device of the present invention is described;
Fig. 3 is a top view, illustrate the of the invention second embodiment blooming wherein one Plant aspect;
Fig. 4 is a sectional view, and the display containing the light-emitting device of the invention is described.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in detail.
Fig. 1 is referred to, a first embodiment of light-emitting device of the present invention 1 includes a blooming 2, and a light emitting module 3.The first embodiment of the invention is mainly by the blooming 2 Setting and reach the purpose of wide colour gamut.
The blooming 2 includes that a first base material 21, is spaced phase with the first base material 21 To the second base material 22, and one layer be located between the first base material 21 and second base material 22 dissipate Penetrate layer 23.
The first base material 21 has contrary first face 211 and an incidence surface 212, should Second base material 22 has 221, one, second face towards first face 211 in contrast to this The exiting surface 222 in the second face 221.The first base material 21 is with second base material 22 by macromolecule Material is constituted, and constituent material can be identical or different, it is preferred that the first base material 21 PET is selected from the constituent material of second base material 22 (polyethylene terephthalate, PET), cyclic olefin copolymerized macromolecule (cyclo olefin (co)-polymers, COC), pi (polyimide, PI), polyethersulfone resin (polyestersulfone, PES), PEN (polyethylene Naphthalate, PEN), Merlon (polycarbonate, PC), or aforesaid one combination.
The scattering layer 23 is located between first face 211 and second face 221, and containing several Quantum dot 231 and several scattering particles 232, the quantum dot 231 is in one the first color of acceptance After light is excited, second coloured light of the wavelength more than the wavelength of first coloured light can be sent.
In detail, the quantum dot 231 is a kind of nanocrystalline semiconductor material, mainly Semiconductor-quantum-point synthesized by II-VI or III-V, can be in by exciting light After irradiation, the secondary light ray different from exciting light is sent, and the quantum dot 231 can be by material The selection of material or the adjustment of particle size, change and are subject to the emission wavelength after exciting light irradiation, from And send the coloured light with exciting light different colours.The scattering particles 232 substantially evenly disperses In the scattering layer 23, can allow by the scattering particles 232 and enter being somebody's turn to do for the scattering layer 23 First coloured light produces multiple reflection and scattering when the scattering particles 232 is contacted, and increases First coloured light in the light path of the scattering layer 23, to lift quantum dot 231 described in photon collision Probability, and then increase the intensity of the secondary light ray sent after the quantum dot 231 is stimulated.
The present embodiment is the size controlling using the quantum dot 231, to make first coloured light swash Send out quantum dot 231 described and wavelength is sent more than the second coloured light of the wavelength of first coloured light and the Three coloured light, and first coloured light is the one of which of blue light, second coloured light and the three coloured light For ruddiness, another one is green glow, just can make which via sending out white light after mixed light.Especially Ground is that the present invention also further increases by first coloured light (blue light) by the scattering particles 232 In the light path of the scattering layer 23, to lift touching for first coloured light and the quantum dot 231 Collide rate, and increases the intensity of second coloured light and the three coloured light (ruddiness and green glow), therefore, Can effectively lift the conversion efficiency of second coloured light and three coloured light, so expand red, green, The triangle area surrounded by the coordinate of blue three kinds of pure colors, reaches the purpose of wide colour gamut.
In the present embodiment, the particle diameter of the quantum dot 231 between 1nm to 50nm, and compared with Goodly, the particle diameter of the quantum dot 231 is between 2nm to 15nm.The scattering particles 232 particle diameter is between 1nm to 10 μm, and constituent material is selected from silica (SiO2)、 Titanium dioxide (TiO2), germanium dioxide (GeO2), zirconium dioxide (ZrO2), alundum (Al2O3) (Al2O3), or an aforesaid combination.
Herein it is noted that aforementioned scatter particle 232 is through the refractive index with surrounding material Difference and produce disposable scattering properties, the amount that such as adds is too high, then can produce light transmission The problem of rate rapid drawdown.Therefore, can be by the way of the micro- bag method of gel, i.e., each scattering in this The Surface coating at least one of which gel layer (not shown) of particle 232, just can pass through the gel layer Cladding produces the variations in refractive index of gradual change type, it is preferred that the constituent material of the gel layer is selected from Polymethyl methacrylate (polymethylmethacrylate, PMMA), silica resin (silicone), urethane (urethane), polyurethane rubber (poly urethane), poly- third Alkene (polypropylene, PP), or an aforesaid combination.Due to the scattering particles 232 saturating The variations in refractive index that the gel layer produces gradual change type is crossed, so as to the effect of the effective deviation of light can be improved Rate simultaneously increases the path of the equivalent traveling of light, to lift light conversion efficiency, and reduces exciting light because of one The low characteristic of light extraction efficiency produced by secondary property scattering particles.
Additionally, it should also be noted that the scattering particles 232 and the institute for being coated with the gel layer State scattering particles 232 except can individually using in addition to, also can the two simultaneously arrange in pairs or groups and use.
The light emitting module 3 is located at the side of the first base material 21, and can send first coloured light, First coloured light enters the scattering layer 23 via the incidence surface 212 of the first base material 21, and swashs Send out quantum dot 231 described and send second coloured light and the 3rd color of wavelength more than first coloured light Light, the white light are projected by the exiting surface 222 of second base material 22 after mixed light.This Optical module 3 by the use of existing light emitting diode as light source, and can select institute according to actual demand The coloured light to be sent, in the present embodiment, the light emitting module 3 is done with blue light-emitting diode For light source, and the blue light that the blue light-emitting diode sends is first coloured light.Due to this The material selection of optical module 3 is well known to art person and non-with thin portion structure aspect For the technology emphasis of the present invention, therefore no longer add to repeat.
It is described that the first embodiment of the invention utilizes first coloured light (blue light) of shorter wavelength to excite Quantum dot 231 produces longer wavelengths of second coloured light and the three coloured light (ruddiness and green glow), And then the mode by mixed light forms white light, is finally sent out by the exiting surface 222.Additionally, The first embodiment can effectively increase by first color due to the setting of the scattering particles 232 Light excites the probability of the quantum dot 231, and lifts second coloured light and three coloured light (ruddiness With green glow) intensity, and then cause the white light that sends of the light-emitting device 1 because this is red, green glow quilt Supply and lifted, reach the purpose of wide colour gamut.
As the of the invention blooming 2 can have different structure change aspects, therefore, continue with Following embodiments illustrate another kind of structure aspect of the blooming 2.
Fig. 2 is referred to, Fig. 2 show a second embodiment of the light-emitting device 1 of the invention, The light emitting module 3 is omitted in the drafting of Fig. 2, only represents the blooming 2, the present invention this second Embodiment is roughly the same with the first embodiment, is where its difference, the blooming 2 The first base material 21 also has several the first micro-structurals 213 positioned at the incidence surface 212, and this second Base material 22 also has several the second micro-structurals 223 positioned at the exiting surface 222.
The constituent material of first micro-structural 213 and the second micro-structural 223 is selected from poly- methyl-prop E pioic acid methyl ester (acryl), polyurethane (polyurethane, PU), silica resin (silicone), Or an aforesaid combination.And its shape can be identical or different, it is preferred that first micro- knot The shape of structure 213 and the second micro-structural 223 can for taper, semicircle, regular hexagon, do not advise Concaveconvex structure then, or an aforesaid combination.Additionally, first micro-structural 213 is protruded from The height of the incidence surface 212 is 5 μm to 25 μm, and second micro-structural 223 is protruded from The height of the exiting surface 222 is 1 μm to 20 μm.
In the present embodiment, it is with first micro-structural 213 and the shape of the second micro-structural 223 Shape is all as a example by regular hexagon to explain.Coordinate and refer to Fig. 3, specifically, described first Micro-structural 213 and the second micro-structural 223 are respectively provided with several close-packed arrays and from the incidence surface 212 and the exiting surface 222 project upwards and the lenticule 24 in regular hexagon, and several surround The groove 25 of the lenticule 24.
The second embodiment of the invention is by first micro-structural 213 and the second micro-structural 223 Shape or height control, carry out optically focused or make light source dispersed, and can make entrance the light The light of film 2 produces many when first micro-structural 213 and the second micro-structural 223 is contacted Secondary refraction and reflection and increase light path so that the light-emitting device 1 containing the blooming 2 In addition to it can reach the purpose of wide colour gamut, the effect of blast and diffusion is also had concurrently.
Fig. 4, the first embodiment of the invention and the light-emitting device 1 of second embodiment is referred to, is removed Can be applicable to outside lighting apparatus and association area, also apply be applicable to a display, as this The backlight of display.A display 4 containing the light-emitting device 1 is shown in Fig. 4, The display 4 includes a light-emitting device 1 such as the first embodiment, and a panel 41, The panel 41 is located at the side of the blooming 2 of the light-emitting device 1, and by the light-emitting device 1 The light for being sent produces optical effect and assumes image.The panel 41 include Polarizer, liquid crystal, The structures such as alignment film, colored filter, due to thin portion structure and the material selection of the panel 41 Well known to art person, and can be realized according to prior art, no longer be added in this Repeat.The display 4 effectively lifts gamut range by the setting of the light-emitting device 1, And then realize high-quality color effect, so that the display 4 that should have wide colour gamut is presented Color more horn of plenty, bright-coloured, and the visual experience of user can be substantially improved.
In sum, the blooming 2 of the invention is made due to the interpolation of the scattering particles 232 Obtaining the first coloured light sent by the light emitting module 3 is carried out instead via the scattering particles 232 Penetrate, and extend in the scattering layer 23 residence time and effectively increase by second coloured light with The intensity of three coloured light so that the luminous intensity of the white light more preferably can be evenly distributed.Additionally, The blooming 2 can also by the setting of first micro-structural 213 and the second micro-structural 223, Carry out optically focused or be uniformly dispersed light source.Utilization of the present invention by the blooming 2, so as to One kind can be provided and have high colour gamut, high brightness, and the light-emitting device 1 of high evenness concurrently, can not only Meet the market demand and lift economic worth, moreover it is possible to be applied to Lighting Industry with display On backlight module, the display 4 containing the light-emitting device 1 is enable to realize higher-quality color Effect, meets consumer demand, with the scale that promotes and open up a market, can reach really the present invention Purpose.

Claims (10)

1. a kind of blooming, comprising:One the first base material, between one and the first base material Second base material of compartment pair, and one layer of scattering layer, it is characterised in that:The scattering layer is located at should Between the first base material and second base material, and containing several quantum dots and several scattering particles, institute Quantum dot is stated after one the first coloured light of acceptance is excited, and a wavelength is sent more than first color Second coloured light of the wavelength of light.
2. blooming as claimed in claim 1, it is characterised in that:First coloured light is also The quantum dot can be excited to send the 3rd color of the wavelength more than the wavelength of first coloured light Light, first coloured light are blue light, and second coloured light is red with the one of which of the three coloured light Light, another one are green glow.
3. blooming as claimed in claim 1, it is characterised in that:The quantum dot , between 1nm to 50nm, the particle diameter of the scattering particles is between 1nm to 10 μm for particle diameter.
4. blooming as claimed in claim 1, it is characterised in that:Each scattering Particle has at least one of which gel layer for being coated on its surface, and the constituent material of the gel layer Selected from polymethyl methacrylate, silica resin, urethane, polyurethane rubber, poly- Propylene, or an aforesaid combination.
5. blooming as claimed in claim 1, it is characterised in that:The scattering particles Constituent material be selected from silica, titanium dioxide, germanium dioxide, zirconium dioxide, three oxygen Change two aluminium, or an aforesaid combination.
6. blooming as claimed in claim 1, it is characterised in that:The first base material tool There are first face of contrary and an incidence surface, and several positioned at the first micro- of the incidence surface Structure, second base material has second face towards first face, one in contrast to this The exiting surface in the second face, and several the second micro-structurals positioned at the exiting surface, and the scattering layer It is located between first face and second face;Incidence surface of first coloured light via the first base material By the scattering layer, and projected by the exiting surface of second base material.
7. blooming as claimed in claim 6, it is characterised in that:First micro- knot Structure and second micro-structural are shaped as taper, semicircle, regular hexagon, irregular Concaveconvex structure, or an aforesaid combination.
8. blooming as claimed in claim 6, it is characterised in that:First micro- knot It is 5 μm to 25 μm that structure protrudes from the height of the incidence surface, and second micro-structural is protruded from The height of the exiting surface is 1 μm to 20 μm.
9. a kind of light-emitting device, comprising:One as described in any one of claim 1 to 8 Blooming, an and light emitting module, it is characterised in that:The light emitting module be located at this first The side of base material, and first coloured light is sent, first coloured light is entered via the first base material The scattering layer, and excite the quantum dot to send the wavelength more than the wavelength of first coloured light Second coloured light, the white light are projected by second base material after mixed light.
10. a kind of display, comprising:One light-emitting device as claimed in claim 9; And a panel, it is characterised in that:The panel is located at the side of the blooming of the light-emitting device, And the light sent by the light-emitting device produces optical effect and assumes image.
CN201610090037.7A 2015-09-03 2016-02-18 Optical film, and light-emitting device and display containing same Active CN106501888B (en)

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TW104129106A TWI705897B (en) 2015-09-03 2015-09-03 Optical film, and light-emitting device and display containing the optical film

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CN111435183A (en) * 2019-05-24 2020-07-21 宁波激智科技股份有限公司 Interlayer dimming sheet and preparation method thereof
CN111808603A (en) * 2020-07-13 2020-10-23 Tcl华星光电技术有限公司 Quantum dot film, preparation method thereof and display device
CN112051685A (en) * 2019-06-05 2020-12-08 睿亚光电股份有限公司 Optical element
CN113362702A (en) * 2021-06-28 2021-09-07 武汉华星光电技术有限公司 Brightness enhancement film, preparation method thereof, backlight module and display device
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CN114019721A (en) * 2021-11-03 2022-02-08 惠州视维新技术有限公司 Diffusion plate, backlight module and display device
CN114755861A (en) * 2022-06-15 2022-07-15 广东欧迪明光电科技股份有限公司 High-efficiency quantum dot optical substrate and preparation method thereof
CN114755861B (en) * 2022-06-15 2023-01-06 广东欧迪明光电科技股份有限公司 High-efficiency quantum dot optical substrate and preparation method thereof

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