CN107783223A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN107783223A CN107783223A CN201710896360.8A CN201710896360A CN107783223A CN 107783223 A CN107783223 A CN 107783223A CN 201710896360 A CN201710896360 A CN 201710896360A CN 107783223 A CN107783223 A CN 107783223A
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- Prior art keywords
- light
- quantum dot
- excitation source
- backlight module
- guide plate
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
-
- 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
-
- 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 present invention discloses a kind of backlight module and display device, wherein, the backlight module includes excitation source and leaded light component, the excitation source is located at the side of the leaded light component, the leaded light component includes light guide plate and the optically focused rod between the excitation source and the light guide plate, the optically focused rod is used to converge the light that the excitation source is sent and is refracted into the light guide plate, is provided with the optically focused rod and is used to be excited to form the quantum dot of white light by the light that the excitation source is sent.The present invention can be avoided in the prior art using the unstable technical problem of the properties of product caused by relatively thin light guide plate.
Description
Technical field
The present invention relates to electronic display technology field, and in particular to the display of a kind of backlight module and the application backlight module
Device.
Background technology
To meet slimming design, display device of the prior art sets LED light source frequently with side entrance back module
The side of light guide plate is placed in, quantum dot is coated with blooming piece, forms quantum dot diaphragm, the colored light that LED light source is sent leads to
Cross light guide plate and form uniform area source, then white light is formed by quantum dot diaphragm.
In the prior art, by the thinning as far as possible of the thickness of light guide plate, further to reduce the thickness of display device, it is
Cooperation light guide plate, the size of LED light source also reduce in the lump.The smaller light efficiency conversion ratio of size of LED light source is lower, encapsulation difficulty
It is bigger, reduce the size of LED light source, LED light source reliability is bad, display device performance is unstable so as to cause.
Therefore, it is necessary to a kind of new backlight module and display device are provided, to solve above-mentioned technical problem.
The content of the invention
The main object of the present invention is to provide a kind of backlight module and display device, it is intended to solves existing backlight module and uses
The unstable technical problem of properties of product caused by relatively thin light guide plate.
To achieve the above object, display module proposed by the present invention includes excitation source and leaded light component, the exciting light
Source is located at the side of the leaded light component, and the leaded light component includes light guide plate and located at the excitation source and the light guide plate
Between optically focused rod, the optically focused rod be used for converge the light that the excitation source is sent and be refracted into the light guide plate, it is described
It is provided with optically focused rod and is used to be excited to form the quantum dot of white light by the light that the excitation source is sent.
Preferably, the light guide plate includes the incidence surface of excitation source described in face, and the optically focused rod is to swash described in face
The convex lens of light emitting source, the focus of the convex lens fall on the incidence surface.
Preferably, the light emission side of the convex lens is convex surface, and the incident side of the convex lens is convex surface, concave surface or flat
Face；
Or the light emission side of the convex lens is plane, and the incident side of the convex lens is convex surface.
Preferably, the thickness of the light guide plate is less than 2mm.
Preferably, the excitation source is multiple LED lamp beads for being spaced setting, and the LED lamp bead includes LED core
Piece, the length and width of the LED chip are all higher than the thickness of the light guide plate.
Preferably, the quantum dot includes the one or more in red quantum dot, green quantum dot and blue quantum dot.
Preferably, the quantum dot is inorganic perovskite quantum dot, and the inorganic perovskite quantum dot chemical formula is
CsPbX3, X is Cl, Br or I in formula.
Preferably, any one in the first compound that the quantum dot is formed by the element in group ii and Group IV
Or any one material in the second compound of the element formation in III-th family and group V is made；
Or the quantum dot is by least one of described first compound and at least one in the second compound
The core shell structure compound or Doped nanocrystal material that kind cladding is formed are made；
Or the quantum dot is by a variety of cladding shapes in a variety of or described second compounds in first compound
Into core shell structure compound or Doped nanocrystal material be made.
Preferably, the optically focused rod is molded after uniformly being mixed by optical plastic of the light transmittance more than 90% and the quantum dot
Shaping.
The present invention also provides a kind of display device, and the display device includes housing, liquid crystal panel and backlight as the aforementioned
Module, the liquid crystal panel and the backlight module are contained in the housing..
In technical solution of the present invention, by setting the optically focused rod so that the light that the excitation source is sent can pass through institute
The light guide plate is entered back into after stating the convergence of optically focused rod, the light that the excitation source is sent is concentrated, to improve the exciting light
Source and the coupling efficiency of the light guide plate；When the size of the excitation source of use is bigger than the thickness of the light guide plate, institute
The light guide plate can also be fully entered by stating the light that excitation source is sent, the problem of avoiding bad light-leaking；It is described poly- by setting
Optical wand, the bad technical problem of the properties of product caused by using the excitation source of reduced size can be avoided；Compared to
Quantum film of the prior art, by the way that the quantum dot is located in the optically focused rod so that the quantum dot excites with described
The distance of light source is near, is advantageous to improve the quantum dot launching efficiency.So as to realize that high launching efficiency, ultra-thin, superelevation image quality show
The quantum dot design of backlight module shown.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the cut-away section structural representation of the embodiment of display device one of the present invention；
Fig. 2 is the optical principle schematic diagram that the embodiment of optically focused rod one of the present invention is applied in backlight module；
Fig. 3 is the optical principle schematic diagram that optically focused rod second embodiment of the present invention is applied in backlight module；
Fig. 4 is the optical principle schematic diagram that optically focused rod 3rd embodiment of the present invention is applied in backlight module；
Fig. 5 is the optical principle schematic diagram that optically focused rod fourth embodiment of the present invention is applied in backlight module.
The drawing reference numeral explanation of first embodiment：
| Label | Title | Label | Title |
| 10 | Backlight module | 1 | Excitation source |
| 3 | Leaded light component | 31 | Light guide plate |
| 311 | Incidence surface | 313 | Exiting surface |
| 315 | Reflecting surface | 35 | Reflector plate |
| 37 | Blooming piece | 33 | Optically focused rod |
| 331a | First side | 333a | Second side |
| 20 | Housing | 21 | Face-piece |
| 22 | Rear shell | 23 | Backboard |
| 24 | Radiator | 241 | Side wall |
| 243 | Bottom wall | 25 | Glue frame |
| 40 | Liquid crystal panel |
The brief description of the drawings of second embodiment：
| 33b | Convex lens | 331b | First side |
| 333b | Second side |
The brief description of the drawings of 3rd embodiment：
| 33c | Convex lens | 331c | First side |
| 333c | Second side |
The brief description of the drawings of fourth embodiment：
| 33d | Convex lens | 331d | First side |
| 333d | Second side |
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining the relative position relation under a certain particular pose (as shown in drawings) between each part, motion conditions etc., if should
When particular pose changes, then directionality instruction also correspondingly changes therewith.
In addition, in the present invention such as relating to the description of " first ", " second " etc. be only used for describe purpose, and it is not intended that
Indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " connection ", " fixation " etc. should be interpreted broadly,
For example, " fixation " can be fixedly connected or be detachably connected, or integrally；Can be mechanically connect or
Electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be the connection or two of two element internals
The interaction relationship of individual element, limited unless otherwise clear and definite.For the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the technical scheme between each embodiment of the present invention can be combined with each other, but must be general with this area
Logical technical staff can be implemented as basis, will be understood that when the combination appearance of technical scheme is conflicting or can not realize this
The combination of technical scheme is not present, also not within the protection domain of application claims.
In the present invention, unless otherwise clearly defined and limited, " excitation source of small size " and " big chi of the invention
" size " of excitation source is for the thickness of light guide plate in very little excitation source ".
The present invention proposes a kind of backlight module 10.
Fig. 1 is refer to, is the cut-away section structural representation of the embodiment of display device one of the present invention.
In an embodiment of the present invention, backlight module 10 includes excitation source 1 and leaded light component 3, and excitation source 1 is located at and led
The side of optical assembly 3, leaded light component 3 include light guide plate 31 and the optically focused rod 33 between excitation source 1 and light guide plate 31, gather
Optical wand 33 is used to converge the light that excitation source 1 is sent and is refracted into light guide plate 31, is provided with optically focused rod 33 and is used for stimulated luminescence
The light that source 1 is sent excites to form the quantum dot of white light (not shown).
By setting optically focused rod 33 so that the light that excitation source 1 is sent can be entered back into after the convergence by optically focused rod 33 and led
Tabula rasa 31, the light that excitation source 1 is sent is concentrated, to improve the coupling efficiency of excitation source 1 and light guide plate 31；When swashing for use
When the size of light emitting source 1 is bigger than the thickness of light guide plate 31, the light that excitation source 1 is sent can also fully enter light guide plate 31, keep away
The problem of exempting from bad light-leaking；By setting optically focused rod 33, the product caused by using the excitation source of reduced size can be avoided
The bad technical problem of performance；Compared to quantum film of the prior art, by the way that quantum dot is located in optically focused rod 33 so that amount
Son point is near with the distance of excitation source 1, is advantageous to improve quantum dot launching efficiency.
Referring to Fig. 2, in one embodiment, light guide plate 31 includes the incidence surface 311 of face excitation source 1, optically focused rod 33
For the optically focused rod 33 of face excitation source 1, the focus of optically focused rod 33 is on incidence surface 311.Specifically, light guide plate 31 is used to swash
The spot light or line source that light emitting source 1 is sent diffuse to form area source, and excitation source 1 is in small distance with optically focused rod 33, can incite somebody to action
The light that excitation source 1 is sent regards directional light as, when the directional light that the focus of optically focused rod 33 is on incidence surface 1, and excitation source 1 is sent
Focus is converged at, that is, is converged on incidence surface 311, so as to improve coupling efficiency.Preferably, the focus of optically focused rod 33 is in incidence surface
On 311 axis, to improve the area source light intensity distributions sent after the diffusion of light guide plate 31 evenly.
Specifically, light guide plate 31 includes the exiting surface 313 and reflecting surface 315 being oppositely arranged, and leaded light component 3 also includes face
The blooming piece 37 that the reflector plate 35 and face exiting surface 313 that reflecting surface 315 is set are set.Will be from reflection by the energy of reflector plate 35
The light that face 315 is projected is reflected into light guide plate 31, and increase backlight module 10 sends the uniformity of light.Blooming piece 37 may include to increase
Light film and light-diffusing film etc., those skilled in the art can be selected as needed.
Further, the light emission side of convex lens can be convex surface, and the incident side of convex lens is convex surface, concave surface or plane；
Or the light emission side of convex lens can be plane, and the incident side of convex lens is convex surface.That is, optically focused rod 33 is specifically as follows convexo-convex
Lens, planoconvex spotlight, convex plano lens or concave-convex lens etc., wherein, optically focused rod 33 be which kind of structure convex lens, art technology
Personnel can be selected as needed.The embodiment of optically focused rod 33 presented below with different structure, it is for reference.
Referring to Fig. 2, in the first embodiment, optically focused rod 33 is convex-convex lens, and its light emission side and incident side are convex surface.
Specifically, optically focused rod 33 is included to the raised first side 331a of excitation source 1 and the second side to the projection of incidence surface 311
333a.Excitation source 1 and first side 331a distance is L, and the light that excitation source 1 is sent passes through first side 331a and second
Side 333a occurs to reflect twice, and light guide plate 31 is entered after convergence.To make the focus of optically focused rod 33 fall on incidence surface 311, adjust
The distance of whole optically focused rod 33 and light guide plate 31 is F1.
Referring to Fig. 3, second embodiment is that optically focused rod 33b is convex plano lens with first embodiment difference, it enters
Light side is convex surface, and light emission side is plane.Specifically, optically focused rod 33b is included to the raised first side 331b of excitation source 1 and court
To the second side 333b of incidence surface 311, second side 333b is plane.The distance of excitation source 1 and first side 331b is
L, the light that excitation source 1 is sent occur unirefringence by first side 331b, light guide plate 31 are entered after convergence.To make optically focused rod
33 focus falls on incidence surface 311, and the distance of adjustment optically focused rod 33 and light guide plate 31 is F2.
Referring to Fig. 4,3rd embodiment is that optically focused rod 33c is planoconvex spotlight with first embodiment difference, it enters
Light side is plane, and light emission side is convex surface.Specifically, optically focused rod 33c includes towards the first side 331c of excitation source 1 and to entering
The raised second side 333c of smooth surface 311, first side 331c is plane.The distance of excitation source 1 and first side 331c is
L, the light that excitation source 1 is sent occur unirefringence by second side 333c, light guide plate 31 are entered after convergence.To make optically focused rod
33 focus falls on incidence surface 311, and the distance of adjustment optically focused rod 33 and light guide plate 31 is F3.
Referring to Fig. 5, fourth embodiment is that optically focused rod 33d is concave-convex lens with first embodiment difference, it enters
Light side is concave surface, and light emission side is convex surface.Specifically, optically focused rod 33d includes first side 331d and the second side being oppositely arranged
333d, first side 331d and second side 333d are raised to incidence surface 311.Excitation source 1 is with first side 331d distances
L, the light that excitation source 1 is sent occur to reflect twice by first side 331d and second side 333d, and leaded light is entered after convergence
Plate 31, wherein, scattering process occurs by first side 331d.To make the focus of optically focused rod 33 fall on incidence surface 311, adjustment
Optically focused rod 33d and light guide plate 31 distance are F4.
Above in each embodiment, the distance L of excitation source 1 to first side is identical, using the optically focused rod of different structure
33, the focus to cause optically focused rod 33 to converge falls on incidence surface 311, the distance between light guide plate 31 and optically focused rod 33 difference.
So those skilled in the art can select the different structures of optically focused rod 33, to meet light guide plate 31 and optically focused according to actual conditions
Position relationship between rod 33.Preferably, optically focused rod 33 is convex-convex lens, so that optically focused rod 33 and the space needed for light guide plate 31
Position is minimum, is advantageous to display module slimming design.
Referring to Fig. 1 and Fig. 2, in one embodiment, the thickness of light guide plate 31 is less than 2mm.To meet that slimming is set
Meter.Further, excitation source 1 is multiple LED lamp beads (not shown) for being spaced setting, and LED lamp bead includes LED chip,
The length and width of LED chip is all higher than the thickness of light guide plate 31.In the present embodiment, excitation source 1 is multiple LED lamp bead shapes
Into lamp bar, LED lamp bead is also coated on the packaging plastic in LED chip, and LED core chip size is 70mm × 20mm.By setting
The length and width for putting LED chip is all higher than the thickness of light guide plate 31 so that, can while light guide plate 31 meets slimming design
Using the LED chip of large-size, so as to avoid display module from causing performance bad because LED lamp bead size is smaller, encapsulation is bad
Technical problem.
Specifically, backlight module 10 also includes the first support block (not indicating) for fixing optically focused rod 33 and second
Bracer (does not indicate), and the first support block is located at the both sides of excitation source 1, the opposite sides point of optically focused rod 33 respectively with the second support block
It is not fixedly connected with the first support block with the second support block.
In one embodiment, quantum dot includes red quantum dot, green quantum dot and one kind or more in blue quantum dot
Kind.Those skilled in the art can select different excitation sources 1 to send the light of different wave length according to the difference of quantum dot, so that
The light and quantum dot that excitation source 1 is sent the light mixing that the light that light source 1 is sent excites to obtain that is stimulated receive white light.Specifically,
When quantum dot is green quantum dot, can use send wavelength for 620 nanometers~760 nanometers and 430 nanometers~450 nanometers swash
Light emitting source 1；When quantum dot is red quantum dot, it can use and send wavelength as 620 nanometers~760 nanometers and 490 nanometers~580
The excitation source 1 of nanometer；When quantum dot is red quantum dot and green quantum dot, can use send wavelength for 430 nanometers~
455 nanometers of excitation source 1；When quantum dot is red quantum dot, green quantum dot and blue quantum dot, it can use and send ripple
A length of 380 nanometers~430 nanometers of excitation source 1.Using the excitation source 1 that can send different wave length, so as to increase display mould
The colour gamut of group 10.
In one embodiment, quantum dot is inorganic perovskite quantum dot, and the chemical formula of inorganic perovskite quantum dot is
CsPbX3, X is Cl, Br or I in formula.The fluorescence quantum efficiency of inorganic perovskite quantum dot is high, wavelength of fluorescence is adjustable, and covers whole
Individual visible light wave, line width.
In another embodiment, it is any in the first compound that quantum dot is formed by the element in group ii and Group IV
Any one material in the second compound that element in a kind of or III-th family and group V is formed is made；Or quantum dot
The core shell structure compound that is formed by least one of at least one of first compound and second compound cladding or
Doped nanocrystal material is made；Or quantum dot is by a variety of cladding shapes in a variety of or second compound in the first compound
Into core shell structure compound or Doped nanocrystal material be made.First compound can be specifically CdSe, CdTe, MgS,
MgSe, MgTe, CaS, CaSe, CaTe, SrS, SrSe, SrTe, BaS, BaSe, BaTe, ZnS, ZnSe, ZnTe and CdS, second changes
Compound can be specifically GaN, GaP, GaAs, InN, InP and InAs.
Further, optically focused rod 33 is molded into after uniformly being mixed by optical plastic of the light transmittance more than 90% and quantum dot
Type, so as to reduce the usage amount of quantum dot.Specifically, optical plastic can be one kind in the materials such as PMMA, MS, PC, PS or
It is a variety of.After the optically focused rod is mixed by optical plastic of the light transmittance more than 90% and the quantum dot according to certain ratio uniform
Injection molding.
The present invention also provides a kind of display device, including housing 20, liquid crystal panel 40 and backlight module 10 as the aforementioned, liquid
Crystal panel 40 and backlight module 10 are contained in the housing 20.
Specifically, housing 20 includes face-piece 21, rear shell 22, backboard 23, radiator 24 and glue frame 25, rear shell 20 and face-piece 21
It is connected and forms cavity volume, liquid crystal panel 40 is held between glue frame 25 and face-piece 21, and backboard 23 and radiator 24 are located at cavity volume
Interior, radiator 24 includes the bottom wall 243 set along backboard 23 and the side wall 241 extended from bottom wall 243 to liquid crystal panel 40, bottom wall
243 are provided with the escape groove 245 for avoiding excitation source 1 so that excitation source 1, optically focused rod 33 and light guide plate 31 it is shared same
Central shaft.In side wall 241, reflector plate 35 is layed on bottom wall 243 excitation source 1.
The light that excitation source 1 is sent enters optically focused rod 33, excites the quantum dot in optically focused rod 33 to obtain the white light of high colour gamut,
Acted on by the convergence of optically focused rod 33, injected after the light convergence sent from excitation source 1 in light guide plate 31 simultaneously.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this
Under the design of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/it is used in indirectly
He is included in the scope of patent protection of the present invention related technical field.
Claims (10)
1. a kind of backlight module, the backlight module includes excitation source and leaded light component, and the excitation source is led located at described
The side of optical assembly, it is characterised in that the leaded light component includes light guide plate and located at the excitation source and the light guide plate
Between optically focused rod, the optically focused rod be used for converge the light that the excitation source is sent and be refracted into the light guide plate, it is described
It is provided with optically focused rod and is used to be excited to form the quantum dot of white light by the light that the excitation source is sent.
2. backlight module as claimed in claim 1, it is characterised in that the light guide plate includes entering for excitation source described in face
Smooth surface, the optically focused rod are the convex lens of excitation source described in face, and the focus of the convex lens falls on the incidence surface.
3. backlight module as claimed in claim 2, it is characterised in that the light emission side of the convex lens is convex surface, and described convex
The incident side of lens is convex surface, concave surface or plane；
Or the light emission side of the convex lens is plane, and the incident side of the convex lens is convex surface.
4. backlight module as claimed in claim 1, it is characterised in that the thickness of the light guide plate is less than 2mm.
5. backlight module as claimed in claim 4, it is characterised in that the excitation source is spaced setting to be multiple
LED lamp bead, the LED lamp bead include LED chip, and the length and width of the LED chip is all higher than the thickness of the light guide plate.
6. the backlight module as any one of claim 1 to 5, it is characterised in that the quantum dot includes red quantum
One or more in point, green quantum dot and blue quantum dot.
7. the backlight module as any one of claim 1 to 5, it is characterised in that the quantum dot is inorganic perovskite
Quantum dot, the inorganic perovskite quantum dot chemical formula is CsPbX3, X is Cl, Br or I in formula.
8. the backlight module as any one of claim 1 to 5, it is characterised in that the quantum dot is by group ii and
Any one in the first compound that element in IV races is formed or the second change of the element formation in III-th family and group V
Any one material in compound is made；
Or the quantum dot is by least one of at least one of described first compound and described second compound bag
Cover the core shell structure compound to be formed or Doped nanocrystal material is made；
Or the quantum dot is formed by a variety of claddings in a variety of or described second compounds in first compound
Core shell structure compound or Doped nanocrystal material are made.
9. the backlight module as any one of claim 1 to 5, it is characterised in that the optically focused rod is more than by light transmittance
Injection molding after 90% optical plastic and the quantum dot uniformly mix.
10. a kind of display device, it is characterised in that the display device includes housing, liquid crystal panel and such as claim 1 to 9
Any one of backlight module, the liquid crystal panel and the backlight module are contained in the housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896360.8A CN107783223B (en) | 2017-09-27 | 2017-09-27 | Backlight module and display device |
| PCT/CN2018/093741 WO2019062239A1 (en) | 2017-09-27 | 2018-06-29 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896360.8A CN107783223B (en) | 2017-09-27 | 2017-09-27 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107783223A true CN107783223A (en) | 2018-03-09 |
| CN107783223B CN107783223B (en) | 2019-08-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710896360.8A Active CN107783223B (en) | 2017-09-27 | 2017-09-27 | Backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107783223B (en) |
| WO (1) | WO2019062239A1 (en) |
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| TWI699595B (en) * | 2019-03-29 | 2020-07-21 | 瑞儀光電股份有限公司 | Backlight module and display device |
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Also Published As
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| CN107783223B (en) | 2019-08-16 |
| WO2019062239A1 (en) | 2019-04-04 |
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