CN209496155U - A kind of composite membrane and backlight module reducing blue light harm - Google Patents
A kind of composite membrane and backlight module reducing blue light harm Download PDFInfo
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- CN209496155U CN209496155U CN201822126280.7U CN201822126280U CN209496155U CN 209496155 U CN209496155 U CN 209496155U CN 201822126280 U CN201822126280 U CN 201822126280U CN 209496155 U CN209496155 U CN 209496155U
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Abstract
The utility model discloses the composite membranes that one kind can reduce blue light harm, including upper base, go to a grassroots level, the microstructure layer being made of photonic crystal set on the upper base and between going to a grassroots level, the microstructure layer is transmissive to wavelength in the light of 450nm or more, while can reflect back wavelength in 450nm light portion below or all.Also disclose the preparation process of the composite membrane, the following steps are included: preparation microstructure layer: preparing base respectively and go to a grassroots level: upper base, microstructure layer and overlapping of going to a grassroots level are integrated, wherein, between microstructure layer is located at upper base and goes to a grassroots level, light-enhancing structure is located at surface layer.A kind of backlight module is also disclosed, including above-mentioned composite membrane.The composite membrane of the utility model, structure is simple, and can accurately obstruct 450nm or less wave band blue light, while not will lead to colour cast.
Description
Technical field
The invention belongs to LED technology fields, and in particular to one kind can reduce the composite membrane and backlight module of blue light harm.
Background technique
Medical research report shows, it is seen that the purple light and blue light in light are maximum to the destruction of retina.Wavelength is 500
Visible light between~800nm there is no destruction to retina, and wavelength is in the purple light between 400~500nm
And blue light, it shortens with wavelength, photon energy increases, and rises rapidly to the extent of damage of retina.Past, people to blue light such as
What not enough understands the mechanism of retinal damage, does not also obtain the attention of ophthalmic industry.Scientists just start over nearly 1 year
Recognize that retina cell contains a kind of abnormal retinene A2E.The A2E is to retinal pigment epithelium in no light dark
Under conditions of there is toxicity, and under illumination condition, the toxicity of A2E is greatly increased.There are two absorption peaks by A2E: one in purple
The 335nm of outskirt；Another 435nm in blue light region.Blue light is a chain reaction to the detrimental effect of retina: first by
In having absorption peak in ultra-violet (UV) band and blue light region so that whether ultraviolet light or blue light can excite A2E to release free radical
Ion；And free radical particle further increases A2E to the damage effect of retinal pigment epithelium so as to cause retinal color
The atrophy of plain epithelium, and then lead to the death of photaesthesia cell.Wherein, the function of photaesthesia cell is to receive incident light and by light
Signal is changed into electric signal, and then electric signal passes through after optic nerve passes to brain again and is imaged.Therefore, photaesthesia cell is dead
Dying will result directly in eyesight and is gradually reduced or even completely loses.
The optical principle of anti-blue light technology is relatively simple, mainly by the barrier of special material, high energy shortwave is blue
Light reflects away, to achieve the purpose that protect eyes from blue light injury.Real difficult point is: blue wave band UV400-
500, and it is maximum to eye injury be the high energy shortwave blue light of 450nm wave band below, therefore mainly consider how accurately
The high energy shortwave blue light of the following wave band of blue light 450nm is obstructed, while controlling color difference, increases light transmittance.
Currently in LED technology field, following anti-blue light scheme is mainly used, in which:
1, bright base software filter is blue, and eyeshield effect is really significant, but colour cast is partially yellow severe.
2, the filter of TPV ABL products-hardware is blue, although solving the problems, such as partially yellow colour cast, its eyeshield effect namely blue light
Filter effect, it is poor.
Summary of the invention
In order to solve the above technical problems, the present invention provides the composite membrane that one kind can reduce blue light harm, structure is simple,
450nm or less wave band blue light precisely can be effectively obstructed, reduces harm of the high energy wave band blue light to human eye, and not will lead to partially
Color.
The invention adopts the following technical scheme:
A kind of composite membrane reducing blue light harm, including upper base, go to a grassroots level, set on the upper base and go to a grassroots level it
Between microstructure layer, 200~500um of thickness of the microstructure layer.
Further, the upper base surface layer is equipped with light-enhancing structure, and the light-enhancing structure is to be uniformly distributed in the upper base
The micro-structure of the cone cell of layer surface.
Further, the micro-structure is rolled in the upper substrate surface by roller press and is made.
Further, the microstructure layer by by photonic crystal structure.
Further, the upper groundwork thickness is 100~200um.
Further, described to go to a grassroots level with a thickness of 100~200um.
Further, material used in the upper base is polymethyl methacrylate, polycarbonate, polystyrene, benzene
One of ethylene-methylmethacrylate copolymer, upper base's refractive index are 1.41~1.6；
The material used of going to a grassroots level is polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl
One of methyl acrylate copolymer, the refractive index of going to a grassroots level is 1.41~1.6.
The present invention also provides a kind of backlight modules, including above-mentioned composite membrane.
It further, further include white light conversion film, diffuser plate, backboard and pcb board, the pcb board is equipped with illuminating module
And lens, the composite membrane, white light conversion film, diffuser plate, backboard and pcb board are successively parallel from top to bottom to be overlapped.
It further, further include illuminating module, light guide plate, the white light being arranged in parallel between the light guide plate and composite membrane
Film is converted, the illuminating module is located at the side of the light guide plate.
Compared with prior art, the invention has the benefit that
1, composite membrane of the invention is provided in upper base and between going to a grassroots level and microstructure is prepared by photonic crystal
Layer, the microstructure layer can full angle penetrate 500-700nm wavelength light.When the angular range of its crystal grain is 25 °~75 °
When, the blue violet light of 450nm or more can be penetrated；When the angle of its crystal grain is not within the scope of for 25 °~75 °, can incite somebody to action
The blue violet light of 400nm~500nm is reflected back fluorescence conversion layer.That is, the microstructure layer can be to 400~500nm
The blue violet light in section carries out selective absorbing, may be implemented only to be totally reflected what 450nm or less wave band most endangered human eye
Blue light, without influencing 450nm above wavelength to the normal wavelength light of color demand.Both it had realized to 450nm or less wave band high energy
The accurate barrier of shortwave blue light, and the partially yellow phenomenon of colour cast can be mitigated, the color difference after the composite membrane filters is controlled, light transmittance is increased.
2, composite membrane obtained by preparation process of the invention can be realized to 450nm or less wave band high energy shortwave blue light
Accurate barrier, and the partially yellow phenomenon of colour cast can be mitigated, control the color difference after the composite membrane filters, increase light transmittance.
3, backlight module of the invention, by using above-mentioned composite membrane, backlight module can full angle penetrate 500nm with
On light, while can be by the fluorescence conversion layer of 450nm blue violet light back into backlight mould group below, reflected light line
The excitation to fluorescent powder in fluorescence conversion layer is further increased, the light extraction efficiency of fluorescence conversion layer is thus greatly improved, into
And realize precisely filtering 450nm once wave band high energy blue light while, reduce the partially yellow problem of the colour cast of backlight module, increase simultaneously
The light transmittance of backlight module.
Detailed description of the invention
Technology of the invention is described in further detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the structural schematic diagram of composite membrane of the present invention；
Fig. 2 is that the spectrum of composite membrane of the present invention compares figure.
Fig. 3 is the structural schematic diagram of backlight module in embodiment 1；
Fig. 4 is the structural schematic diagram of backlight module in embodiment 2.
Description of symbols:
100-composite membranes；101-go to a grassroots level；102-microstructure layers；103-upper bases；104-light-enhancing structures；
201-white light conversion films；202-diffuser plates；203-backboards；204-pcb boards；205-lens；206-blue lights
LED；
301-white light conversion films；302-light guide plates；303-illuminating modules.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The invention discloses the composite membranes 100 that one kind can reduce blue light harm, as shown in Fig. 1~2, including upper base 103,
Go to a grassroots level 101, set on upper base 103 and the microstructure layer 102 gone to a grassroots level between 101, the thickness of microstructure layer 102 is about
200~500um.The microstructure layer 102 is transmissive to wavelength in the light of 450nm or more, while can be by wavelength in 450nm
Light portion below all reflects back.Microstructure layer 102 is formed by photonic crystal ordered arrangement.Wherein, it orderly arranges
Column refer to that crystal is arranged by identical orientation and angle.In same microstructured layers, photonic crystal shape, size and row
Column pitch all tends to be identical.In actual production in use, the light by different size and arrangement spacing can be chosen according to optical filtering demand
The microstructure layer that sub- crystal is constituted.
In general, the thickness of microstructure layer 102 is bigger, it is better to the barrier property of blue light, while it is produced and processed
Performance is also better.For composite membrane overall thickness, in one embodiment, the thickness of microstructure can be with composite membrane 100
Overall thickness demand determine.Wherein, the overall thickness of composite membrane 100 is generally in 0.5mm~1mm or so；
Form the photonic crystal of the microstructure layer 102, can full angle penetrate 500-700nm wavelength light.When
When the angular range of its crystal grain is 25 °~75 °, the blue violet light of 450nm or more can be penetrated；When the angle of its crystal grain does not exist
When within the scope of 25 °~75 °, the blue violet light of 400nm~500nm can be reflected back fluorescence conversion layer.That is, should
Microstructure layer 102 can carry out selective absorbing to the blue violet light of 400~500nm wave band, may be implemented only to be totally reflected
The blue light that 450nm or less wave band most endangers human eye, without influencing 450nm above wavelength to the normal wavelength of color demand
Light.Not only the accurate barrier to 450nm or less wave band high energy shortwave blue light had been realized, but also the partially yellow phenomenon of colour cast can be mitigated, control should
Color difference after the optical filtering of composite membrane 100, increases light transmittance.
Specifically, material used in 101 of going to a grassroots level is polymethyl methacrylate, polycarbonate, polystyrene, benzene second
One of alkene-methylmethacrylate copolymer；101 are gone to a grassroots level with a thickness of 100~200um, preferably 100um；It goes to a grassroots level 101 foldings
Penetrating rate is 1.41~1.6, preferably 1.41.
Material used in upper base 103 is polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl third
One of e pioic acid methyl ester copolymer.Upper base 103 is with a thickness of 100~200um；Upper 103 refractive index of base is 1.41~1.6, preferably
1.41；
It wherein, is the light transmittance for further increasing the composite membrane 100, upper 103 surface layer of base is additionally provided with light-enhancing structure 104,
Light-enhancing structure 104 is the micro-structure for being uniformly distributed in 103 surface of upper base, and micro-structure is generally tapered.The micro-structure by
Roller press is made in upper 103 surface rolling of base.Wherein, it is described be uniformly distributed the shape for referring to micro-structure, size and
Angle is all intended to unanimously, and the size of general micro-structure is in um magnitude.In actual use, it can be selected according to the demand added lustre to
It is arranged to the micro-structure of different shape, size and angle.
The invention also discloses the backlight modules that one kind can reduce blue light harm, which includes above-mentioned composite membrane
100.By using above-mentioned composite membrane 100, backlight module can full angle penetrate the light of 500nm or more, while can will
The fluorescence conversion layer of 450nm blue violet light back into backlight mould group below, reflected light line, which further increases, turns fluorescence
The excitation of fluorescent powder in layer is changed, the light extraction efficiency of fluorescence conversion layer is thus greatly improved.
Embodiment 1
The backlight module of the present embodiment uses LED down straight aphototropism mode set structure, as shown in figure 3, LED downward back optical mode
Group includes above-mentioned composite membrane 100, further includes white light conversion film 201, diffuser plate 202, backboard 203 and pcb board 204, pcb board 204
It is equipped with illuminating module and lens 205, composite membrane 100, white light conversion film 201, diffuser plate 202, backboard 203 and PCB plate 204
It is successively parallel from top to bottom to overlap.
Specifically, 100 lower surface of composite membrane is connect by white light conversion film 201 with diffuser plate 202；Diffuser plate 202 is set to
The upper surface of backboard 203, pcb board 204 is set to the lower surface of backboard 203, and the lower surface of pcb board 204 is equipped with 205 He of lens
Illuminating module makees light angle amplification to blue light source using lens, blue light light can be made to be uniformly distributed in diffuser plate
202.Wherein, illuminating module includes blue-ray LED 206, and white light conversion matrix 201 can be blue light activated fluorescence diaphragm or quantum
Diaphragm.
Embodiment 2
The present embodiment is that backlight module uses LED side entrance back module structure, as shown in figure 4, LED side entrance back mould
Group includes above-mentioned compound die 100, illuminating module 303, light guide plate 302, is arranged in parallel between light guide plate 302 and composite membrane 100
White light conversion film 301, illuminating module position 303 is in the side of light guide plate 302.
Wherein, illuminating module 303 include blue-ray LED and the pcb board for installing blue-ray LED, convenient for by blue-ray LED with
After pcb board connects into an entirety, it is mounted on the side of light guide plate 302.The white light modulus of conversion 301 of light guide plate upper surface setting
It can be blue light activated fluorescence diaphragm or quantum diaphragm, the blue light that illuminating module 303 is issued passes through light guide plate 302, then passes through
It crosses its site to be totally reflected, blue light is exported by its surface, blue light is converted into white light by white light conversion film 301, using multiple
It closes film 100 to reflect back low wavelength blue light, so that low wave harmful blue light be prevented to project.
Statement in the present invention about direction, if upper and lower, left and right are with reference to the accompanying drawings.
Other contents of the composite membrane for reducing blue light harm and backlight module of the present invention referring to the prior art,
This is repeated no more.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. the composite membrane that one kind can reduce blue light harm, it is characterised in that: including upper base, go to a grassroots level, set on the upper base
And the microstructure layer between going to a grassroots level, microstructure layer are formed by photonic crystal ordered arrangement, the thickness of the microstructure layer
Spend 200~500um.
2. the composite membrane according to claim 1 for reducing blue light harm, it is characterised in that: the upper base surface layer is equipped with
Light-enhancing structure, the light-enhancing structure are the micro-structure for being uniformly distributed in the cone cell of the upper substrate surface.
3. the composite membrane according to claim 2 for reducing blue light harm, it is characterised in that: the micro-structure is by roller press
It is made in the upper substrate surface rolling.
4. the composite membrane according to claim 1 for reducing blue light harm, it is characterised in that:
The upper groundwork thickness is 100~200um.
5. the composite membrane according to claim 1 for reducing blue light harm, it is characterised in that:
It is described to go to a grassroots level with a thickness of 100~200um.
6. the composite membrane according to claim 1 for reducing blue light harm, it is characterised in that: material used in the upper base
Material be polymethyl methacrylate, polycarbonate, polystyrene, one of styrene-methylmethacrylate copolymer, it is described on
Base's refractive index is 1.41~1.6；
The material used of going to a grassroots level is polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl propylene
One of sour methyl terpolymer, the refractive index of going to a grassroots level is 1.41~1.6.
7. the backlight module that one kind can reduce blue light harm, it is characterised in that: including according to any one of claims 1 to 6
Composite membrane.
8. the backlight module according to claim 7 for reducing blue light harm, it is characterised in that: further include white light conversion
Film, diffuser plate, backboard and pcb board, the pcb board are equipped with illuminating module and lens, the composite membrane, white light conversion film, expansion
It falls apart, backboard and pcb board from top to bottom successively parallel overlapping.
9. the backlight module according to claim 7 for reducing blue light harm, it is characterised in that: further include illuminating module,
Light guide plate, the white light conversion film being arranged in parallel between the light guide plate and composite membrane, the illuminating module are located at the leaded light
The side of plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126280.7U CN209496155U (en) | 2018-12-18 | 2018-12-18 | A kind of composite membrane and backlight module reducing blue light harm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126280.7U CN209496155U (en) | 2018-12-18 | 2018-12-18 | A kind of composite membrane and backlight module reducing blue light harm |
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| CN209496155U true CN209496155U (en) | 2019-10-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633792A (en) * | 2018-12-18 | 2019-04-16 | 广东晶科电子股份有限公司 | A kind of composite membrane reducing blue light harm, preparation process and backlight module |
| CN111795307A (en) * | 2020-07-02 | 2020-10-20 | 中国计量大学 | LED device for realizing low blue light harm and high color rendering |
-
2018
- 2018-12-18 CN CN201822126280.7U patent/CN209496155U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633792A (en) * | 2018-12-18 | 2019-04-16 | 广东晶科电子股份有限公司 | A kind of composite membrane reducing blue light harm, preparation process and backlight module |
| CN109633792B (en) * | 2018-12-18 | 2024-03-19 | 广东晶科电子股份有限公司 | Composite film capable of reducing blue light hazard, preparation process and backlight module |
| CN111795307A (en) * | 2020-07-02 | 2020-10-20 | 中国计量大学 | LED device for realizing low blue light harm and high color rendering |
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