CN105093662B - Optical filter and backlight module - Google Patents

Optical filter and backlight module Download PDF

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Publication number
CN105093662B
CN105093662B CN201510578359.1A CN201510578359A CN105093662B CN 105093662 B CN105093662 B CN 105093662B CN 201510578359 A CN201510578359 A CN 201510578359A CN 105093662 B CN105093662 B CN 105093662B
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China
Prior art keywords
film layer
optical filter
plate
light
light guide
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CN201510578359.1A
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Chinese (zh)
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CN105093662A (en
Inventor
樊勇
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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

Abstract

The present invention discloses a kind of optical filter, the optical filter includes a substrate, multiple first film layers and multiple second film layers, multiple first film layers and multiple second film layers are set to the same side of the substrate, first first film layer is set to a surface of the substrate, second film layer successively replaces superposition with first film layer, first film layer is set as apart from one layer of the substrate farthest, first film layer has first refractive index, second film layer has the second refractive index, and the first refractive index is bigger than second refractive index.The optical filter can promote the color saturation of liquid crystal display panel.Invention additionally discloses a kind of backlight modules.

Description

Optical filter and backlight module
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of optical filter and with the optical filter backlight module.
Background technology
Liquid crystal display device has become the mainstream of modern display field, and liquid crystal itself cannot shine, so it is generally necessary to Backlight module provides light source, in the prior art, light source of the generally use white light source as backlight module.At present, it is the most general Time white light source be coated with the blue light wick of yellow aluminium yttrogarnet (YAG) fluorescent powder for surface, however, using yellow aluminium yttrium stone The backlight of garnet fluorescent powder, after arranging in pairs or groups with liquid crystal display panel, the color saturation of the color shown by liquid crystal display device Relatively low, the color shown by liquid crystal display device is not bright-coloured enough.
Invention content
The technical problems to be solved by the invention are, provide a kind of optical filter, and the optical filter can improve liquid crystal The color saturation of the display color of showing device.
The present invention also provides a kind of backlight modules.
In order to solve the above-mentioned technical problem, on the one hand, the embodiment provides a kind of optical filter, including：One base Plate, multiple first film layers and multiple second film layers, multiple first film layers and multiple second film layers are set to the base The same side of plate, the first film layer described in first layer are set to a surface of the substrate, second film layer and described first Film layer is successively alternately superimposed, and total number of plies of first film layer and second film layer is greater than or equal to 10 layers, apart from the base Farthest one layer of plate is set as first film layer, and first film layer has a first refractive index, and second film layer has the Two refractive index, the first refractive index are bigger than second refractive index.
Wherein, the first film layer materials are TiO2、Nb2O5、Ti3O5、Ti2O3, TiO and CeO2At least one of.
Wherein, the second film layer materials are Y2O3、SiO2、CeF3、YF3At least one of with ZnO.
Wherein, the substrate is glass, sapphire or polyester film.
Wherein, total number of plies of first film layer and second film layer is in the range of 15 layers to 60 layers, and described first The thickness of film layer is in the range of 30nm to 140nm, and the thickness of second film layer is in the range of 50nm to 150nm.
Wherein, penetrance of the optical filter in the range of wavelength is 570 to 610nn is less than 30%, is 420nm in wavelength Penetrance in the range of to 560nm and in the range of 615nm to 680nm is more than 75%.
On the other hand, the present invention also provides a kind of backlight modules, described white including light guide plate, white light source and circuit board Radiant is fixed on the circuit board, and the optical filter and one in the backlight module also any description above technical solution are solid Determine part, the optical filter is set between the light guide plate and the white light source, and the optical filter has the first film layer Surface is opposite with the incidence surface of the light guide plate, and the substrate of the optical filter is opposite with the white light source, the optical filtering Piece is fixed on by the fixing piece on the circuit board and/or the light guide plate.
Wherein, the fixing piece is a clamp rail, and the clamp rail includes upper clamp plate and lower clamp plate, the upper clamp plate Opposite with the lower clamp plate and set, the upper clamp plate close to the light-emitting surface of the light guide plate, far from described lead by the lower clamp plate The light-emitting surface of tabula rasa, the upper clamp plate are provided with the first groove, and the lower clamp plate is provided with the second groove, and described first is recessed Slot is opposite with second groove, and the filter holder is held between the upper clamp plate and the lower clamp plate, and the optical filter Top edge be embedded in first groove, lower edge is embedded in one end of second groove, the upper clamp plate and the lower clamp plate The circuit board is individually fixed in, the other end is individually fixed in the light guide plate.
Wherein, the fixing piece is shading glue, and the shading glue includes upper shading glue and lower shading glue, the optical filter are consolidated Due between the upper shading glue and the lower shading glue, described upper shading glue one end is pasted on the light-emitting surface of the light guide plate, The other end is fixed on the circuit board, and described lower shading glue one end is pasted on the table opposite with the light-emitting surface of the light guide plate Face, the other end are fixed on the circuit board.
Wherein, the white light source is coated with the blue-ray LED of yellow fluorescent powder for surface, surface is coated with the indigo plant of red green fluorescence powder Light LED or surface are coated with the ultraviolet leds of RGB fluorescent powder.
Wherein, the backlight module further includes reflector plate, backboard and posting, and the reflector plate is fixed on the light guide plate The surface opposite with its light-emitting surface, the backboard include the first side wall and second sidewall, the first side wall and described second Side wall formed an accommodating space, the reflector plate, the light guide plate, the white light source, the circuit board, the optical filter and The fixing piece is contained in the accommodating space of the backboard, and the circuit board fits in the interior of the first side wall Side, the posting include across portion and indulge across portion, and described indulge fits in the outside of the first side wall across portion, described across portion Be fixed on it is described vertical across portion and the edge for the light-emitting surface for extending to the light guide plate, it is described across the edge in portion with it is described go out The imbricate of smooth surface, with the fixation light guide plate.
Compared with prior art, technical scheme of the present invention has the advantages that：The optical filter of the present invention is provided with The first film layer with first refractive index and the second film layer with the second refractive index, and first film layer and second film Layer is alternately superimposed, and the first refractive index is more than second refractive index, so as to make light of the wavelength in the range of 570 to 610nn Reflection, and light of the wavelength in the range of 420nm to 560nm and in the range of 615nm to 680nm passes through the optical filter, so as to Promote color saturation.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of optical filter in the embodiment of the present invention；
Fig. 2 is the structure diagram of backlight module in the first embodiment of the present invention；
Fig. 3 is the structure diagram of clamp rail in first embodiment of the invention；
Fig. 4 is the structure diagram of the embodiment of the present invention dorsulum；
Fig. 5 is the structure diagram of backlight module in second embodiment of the invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is clearly retouched It states.
Referring to Fig. 1, Fig. 1 is the structure diagram of optical filter in the embodiment of the present invention.In the embodiment of the present invention, filter Mating plate 10 includes substrate 11, multiple first film layers 12 and multiple second film layers 13, and the first film layer 12 and the second film layer 13 are all set In the same side of substrate 11, the surface for being directly arranged at substrate 11 is the first film layer 12, i.e. first the first film layer is set to The surface of substrate 11, the second film layer 13 are set in the first film layer 13, be overlapped with the first film layer 12, then again in the second film layer 13 Second the first film layer 12 of upper setting, in this way, the first film layer 12 and the second film layer 13 are alternately superimposed, that is to say, that be set to First the first film layer 12 of substrate is the 1st layer, first the second film layer 13 is the 2nd layer, then odd-level is all the first film layer 12, Even level is all the second film layer 13.Total number of plies of first film layer 12 and the second film layer 13 is greater than or equal to 11 layers, apart from the base Farthest one layer of plate is set as the first film layer 12, i.e. last layer is the first film layer 12, in this way, then the one of the optical filter 10 of gained A surface is substrate, another surface is the first film layer 12.First film layer 12 has first refractive index, and the second film layer 13 has the Two refractive index, the first refractive index are bigger than second refractive index, in one embodiment of the invention, the first refractive The difference of rate and second refractive index is greater than or equal to 0.5.In the present embodiment, the optical filter 10, which is provided with, has first First film layer 12 of refractive index and the second film layer 13 with the second refractive index, and first film layer 12 and second film layer 13 are alternately superimposed, and the first refractive index is more than second refractive index, and the number of plies of the first film layer 12 and the second film layer 13 is more than Or equal to 11 layers, it is preferable that total number of plies of the first film layer 12 and the second film layer 13 is in the range of 15 layers to 60 layers, due to the number of plies It is more, in Fig. 1, all first film layer, 12 and second film layers 13 are not drawn, several the first film layers are omitted in dotted line expression 12 and second film layer 13.Therefore, when light passes through optical filter, multiple refraction by the first film layer 12 and the second film layer 13 and anti- Penetrate, reflected light of the wavelength in the range of 570 to 610nn, and wavelength in the range of 420nm to 560nm and 615nm extremely Light in the range of 680nm then passes through the optical filter, and the color for making feux rouges, blue light and green light is purer, so as to promote color saturation Degree makes the color shown by the liquid crystal display panel using the optical filter more bright-coloured.
In an embodiment of the present invention, the choice of material TiO of first film layer 122、Nb2O5、Ti3O5、Ti2O3, TiO and CeO2At least one of, i.e. the first film layer 12 materials are the single substance among them or two kinds among them or two kinds The mixture of above substance；Second film layer 13 materials are Y2O3、SiO2、CeF3、YF3At least one of with ZnO.
In an embodiment of the present invention, substrate 11 is glass, sapphire or polyester film.
In an embodiment of the present invention, range of the total number of plies of the first film layer 12 and the second film layer 13 at 15 layers to 60 layers Interior, the thickness of the first film layer 12 is in the range of 30nm to 140nm, and the thickness of the second film layer 13 is in the range of 50nm to 150nm It is interior.
For example, in one embodiment of the invention, the first film layer 12 is TiO2, and the second film layer 13 is Y2O3, it is specific next It says, plates the TiO that a layer thickness is 70nm on glass substrate 11 by evaporation coating method2, then in TiO2A layer thickness is deposited on layer is The Y of 105nm2O3, so alternately vapor deposition TiO2Layer and Y2O3Layer, until total number of plies is 53 layers, it is TiO to make last layer2Layer.
In one embodiment of the invention, the first film layer 12 is Nb2O5, and the second film layer 13 is SiO2With the mixing of ZnO Object, specifically, can on sapphire substrate 11 sputter a layer thickness be 140nm Nb2O5, then in Nb2O5Upper one layer of sputter Thickness is the SiO of 150nm2With the mixture layer of ZnO, alternately so sputter Nb2O5Layer and SiO2With the mixture layer of ZnO, until Total number of plies is 15 layers, and last layer is made to be Nb2O5Layer.
In an embodiment of the present invention, the optical filter 10 is less than in wavelength for the penetrance in the range of 570nn to 610nn 30%, the penetrance in the range of wavelength is 420nm to 560nm and in the range of 615nm to 680nm is more than 75%, so as to carry Height uses the color saturation of the color of the liquid crystal display panel of the optical filter.
Fig. 2, Fig. 3 and Fig. 4 are please referred to, Fig. 2 is the structure diagram of backlight module in the first embodiment of the present invention；Fig. 3 It is the structure diagram of clamp rail in first embodiment of the invention；Fig. 4 is the structural representation of the embodiment of the present invention dorsulum Figure.A kind of backlight module is provided in the first embodiment of the present invention, the backlight module includes light guide plate 20, white light source 30 With the optical filter 10 described in circuit board 40 and any of the above embodiment and the fixing piece 50 for fixing optical filter 10.White light Light source 30 is fixed on circuit board 40, and optical filter 10 is set between light guide plate 20 and white light source 30, and optical filter 10 has The surface of first film layer is opposite with the incidence surface 21 of light guide plate 10, and the substrate 11 of optical filter 10 is opposite with white light source 30, described Optical filter 10 is fixed on by the fixing piece 50 on circuit board 40 and/or light guide plate 20.
In the present embodiment, fixing piece 50 is a clamp rail 50, and the clamp rail 50 includes upper clamp plate 51 and lower folder Plate 52, the upper clamp plate 51 is opposite with the lower clamp plate 52 and sets, and the upper clamp plate 51 is provided with the first groove 511, described Lower clamp plate 52 is provided with the second groove 521, and first groove 511 is opposite with second groove 521, and the optical filter 10 presss from both sides It is held between the upper clamp plate 51 and the lower clamp plate 52, and the top edge of the optical filter 10 is embedded in first groove 511, And lower edge is then embedded in second groove 521, and optical filter 10 is made not to be subjected to displacement, the top edge refer to optical filter 10 it Close to the edge of the light-emitting surface 22 of light guide plate 20, the lower edge refers to the edge far from the top edge of optical filter.Clamping Guide rail 50 is set between circuit board 40 and the incidence surface 21 of light guide plate 20, and upper clamp plate 51 is close to the light-emitting surface 22 of light guide plate 20 Light guide plate 20 is fixed in side, one end of upper clamp plate 51, and the other end is fixed on circuit board 40；Lower clamp plate 52 is close to light guide plate 20 Lower surface, the lower surface refer to the surface opposite with the light-emitting surface of light guide plate 20 22, and circuit is fixed in one end of lower clamp plate 52 Plate 40, the other end are fixed on light guide plate 20.
The white light source 30 is coated with the blue-ray LED of yellow fluorescent powder for surface, surface is coated with the blue light of red green fluorescence powder LED or surface are coated with the ultraviolet leds of RGB fluorescent powder.The blue-ray LED for being coated with yellow fluorescent powder can be coated with The blue-ray LED of yellow aluminium yttrogarnet fluorescent powder.30 light of white light source is emitted to optical filter 10, by the multiple of optical filter 10 When the first film layer 12 and multiple second film layers 13, experiencing multiple reflections and refraction finally make wavelength in the range of 570 to 610nn Light reflected, and light of the wavelength in the range of 420nm to 560nm and in the range of 615nm to 680nm then pass through the filter Mating plate 10 so that by blue light, feux rouges and green light it is purer, so as to promote the liquid crystal display panel using the backlight module The color saturation of display color.When first film layer of optical filter is TiO2, the second film layer is Y2O3, and total number of plies is 53 During layer, in the case of white light source is to be coated with the blue-ray LED of yellow aluminium yttrogarnet (YAG) fluorescent powder, liquid crystal display panel The color saturation of display color can be promoted from NTSC when being not provided with optical filter of the present invention 71.9% to setting It is equipped with NTSC99.2% during optical filter of the present invention；The blue light of red green fluorescence powder is coated with for surface for white light source The situation of LED, the color saturation of the display color of liquid crystal display panel can be from being not provided with optical filter of the present invention When NTSC94.5% promoted to the NTSC 108% when being provided with optical filter of the present invention.
Fig. 2 and Fig. 4 are please referred to, in the present embodiment, the backlight module further includes reflector plate 60, backboard 70 and posting 80.Reflector plate 60 is fixed on the lower surface of light guide plate 20, and the lower surface refers to the surface opposite with light-emitting surface 22 of light guide plate, Reflector plate 60 is used for the light leaked out on reflection light plate 20, to make full use of light source.Backboard 70 includes the first side wall 71 and second Side wall 72, the first side wall 71 and second sidewall 72 form an accommodating space 73, the reflector plate 60, light guide plate 20, white light source 30th, circuit board 40, optical filter 10 and the fixing piece 50 are contained in the accommodating space 73 of backboard 70, and circuit board 40 pastes Together in the inside of the first side wall 71, with fixing circuit board 40, so as to which the other devices for being fixed on circuit board 40 be made also to obtain It is fixed.The reflector plate 60 can fit in the inside of the second sidewall 72 of backboard 70, and then lightguide plate fixing 20, it is possible to understand that , when 60 lower surface of reflector plate also sets up other elements, the backboard 70 can not be fitted in the reflector plate 60.Institute The glue frame that posting 80 is a closure is stated, including vertical across portion 81 and across portion 82, described indulge fits in the backboard 70 across portion 81 The first side wall 71 outside, described be fixed on across portion 82 described vertical across portion 81 and extend to the light extraction of the light guide plate The edge in face 22, the imbricate across the edge in portion 82 and the light-emitting surface 22, with the fixation light guide plate 20 and Light guide plate 20 and the vertical component between portion 81, make an entirety.
Referring to Fig. 5, Fig. 5 is the structure diagram of backlight module in second embodiment of the invention.Backlight in the present embodiment The structure of backlight module described in the structure and first embodiment of module is essentially identical, and distinctive points are：In the present embodiment The structure of fixing piece 50 is different.In the present embodiment, fixing piece 50 is shading glue 50, and the upper and lower surface of the shading glue is all With viscosity.The shading glue 50 includes upper shading glue and lower shading glue, and optical filter 10 is fixed on the upper shading glue and described Between lower shading glue.The upper shading glue upper surface be fixed on the posting 80 across the lower surface in portion 82, in order into one Step strengthens fixed function, and one end of the upper shading glue can be fixed on the circuit board 40, and the other end can be fixed on leaded light Plate 20, optical filter 10 are fixed on the lower surface of the shading glue by the upper surface of optical filter 10.In the present embodiment, the upper table Face refers to towards, towards identical surface, lower surface refers to the light-emitting surface with light guide plate 20 with the light-emitting surface 22 of the light guide plate 20 22 towards opposite surface.Described lower shading glue one end is pasted on the lower surface of circuit board 40, and the other end is pasted on light guide plate 20 Lower surface edge, the lower surface of optical filter 10 is pasted on the upper surface of lower shading glue.In the present embodiment, the shading glue was both For fixing the optical filter 10, and for blocking the light that white light source is sent out, prevent the backlight module light leakage.
In one embodiment of the invention, can also a radiator be set between the white light source 30 and backboard 70 (not shown) makes heat caused by the white light source 30 disperse in time.At this point, the fixing piece can be fixed on institute with one end Light guide plate 20 is stated, the other end is fixed on the radiator.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments " The description of example " or " some examples " etc. means to combine the embodiment or example particular features, structures, materials, or characteristics described It is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms differ Surely identical embodiment or example are referred to.Moreover, the particular features, structures, materials, or characteristics of description can be any one It is combined in an appropriate manner in a or multiple embodiments or example.
Embodiments described above does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution Within enclosing.

Claims (9)

1. a kind of optical filter, which is characterized in that the optical filter includes a substrate, multiple first film layers and multiple second film layers, Multiple first film layers and multiple second film layers are set to the same side of the substrate, and first first film layer is set The surface of the substrate is placed in, second film layer successively replaces superposition with first film layer, farthest apart from the substrate One layer is set as first film layer, and first film layer has first refractive index, and second film layer has the second refractive index, The first refractive index is bigger than second refractive index, and total number of plies of first film layer and second film layer is at 15 layers to 60 In the range of layer, the optical filter is less than 30% in wavelength for the penetrance in the range of 570 to 610nn, wavelength for 420nm extremely Penetrance in the range of 560nm and in the range of 615nm to 680nm is more than 75%.
2. optical filter as described in claim 1, which is characterized in that first film layer materials are TiO2, Nb2O5, Ti3O5, At least one of Ti2O3, TiO and CeO2, second film layer materials in Y2O3, SiO2, CeF3, YF3 and ZnO at least It is a kind of.
3. optical filter as claimed in claim 1 or 2, which is characterized in that the substrate is glass, sapphire or polyester film.
4. optical filter as claimed in claim 1 or 2, which is characterized in that the thickness of first film layer is in 30nm to 140nm's In the range of, the thickness of second film layer is in the range of 50nm to 150nm.
5. a kind of backlight module, including light guide plate, white light source and circuit board, the white light source is fixed on the circuit board On, which is characterized in that the backlight module further includes Claims 1-4 any one of them optical filter and a fixing piece, institute It states optical filter to be set between the light guide plate and the white light source, the surface equipped with first film layer of the optical filter Opposite with the incidence surface of the light guide plate, the substrate of the optical filter is opposite with the white light source, and the optical filter leads to The fixing piece is crossed to be fixed on the circuit board and/or the light guide plate.
6. backlight module as claimed in claim 5, which is characterized in that the fixing piece is a clamp rail, and the clamping is led Rail includes upper clamp plate and lower clamp plate, and the upper clamp plate is opposite with the lower clamp plate and sets, and the upper clamp plate is close to the leaded light The light-emitting surface of plate, the light-emitting surface of the lower clamp plate far from the light guide plate, the upper clamp plate is provided with the first groove, described Lower clamp plate is provided with the second groove, and first groove is opposite with second groove, and the filter holder is held in the upper folder Between plate and the lower clamp plate, and the top edge of the optical filter is embedded in first groove, and lower edge insertion described second is recessed One end of slot, the upper clamp plate and the lower clamp plate is individually fixed in the circuit board, and the other end is individually fixed in the leaded light Plate.
7. backlight module as claimed in claim 5, which is characterized in that the fixing piece is shading glue, and the shading glue includes Upper shading glue and lower shading glue, the optical filter are fixed between the upper shading glue and the lower shading glue, the upper shading Glue one end is pasted on the light-emitting surface of the light guide plate, and the other end is fixed on the circuit board, and described lower shading glue one end is pasted on The surface opposite with the light-emitting surface of the light guide plate, the other end are fixed on the circuit board.
8. such as claim 5 to 7 any one of them backlight module, which is characterized in that the white light source is coated with Huang for surface The blue-ray LED of color fluorescent powder, surface are coated with the blue-ray LED of red green fluorescence powder or surface is coated with the ultraviolet light of RGB fluorescent powder LED。
9. such as claim 5 to 7 any one of them backlight module, which is characterized in that the backlight module further include reflector plate, Backboard and posting, the reflector plate are fixed on the surface opposite with light-emitting surface of the light guide plate, and the backboard includes first Side wall and second sidewall, the first side wall and the second sidewall form an accommodating space, the reflector plate, the leaded light Plate, the white light source, the circuit board, the optical filter and the fixing piece are contained in the accommodating sky of the backboard Between, and the circuit board fits in the inside of the first side wall, and the posting includes across portion and indulges across portion, described vertical The outside of the first side wall is fitted in across portion, it is described to be fixed on the institute indulged across portion and extend to the light guide plate across portion The edge of light-emitting surface is stated, it is described across the edge in portion and the imbricate of the light-emitting surface, with the fixation light guide plate.
CN201510578359.1A 2015-09-11 2015-09-11 Optical filter and backlight module Active CN105093662B (en)

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CN105867024A (en) * 2016-05-24 2016-08-17 深圳市华星光电技术有限公司 BLU (Backlight Unit) and LCD (Liquid Crystal Display) device
CN106125403A (en) * 2016-09-05 2016-11-16 深圳市华星光电技术有限公司 A kind of backlight module and liquid crystal display
CN106405937B (en) * 2016-11-16 2019-08-13 深圳市华星光电技术有限公司 Backlight module
CN106681055A (en) * 2017-03-14 2017-05-17 深圳市华星光电技术有限公司 Display device
KR102513644B1 (en) * 2017-12-20 2023-03-23 엘지디스플레이 주식회사 Backlight unit and display device having the same
CN109188779B (en) 2018-10-31 2021-07-16 厦门天马微电子有限公司 Backlight module, manufacturing method thereof and display device
TWI788867B (en) * 2021-06-03 2023-01-01 元太科技工業股份有限公司 Light source module and display device

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