CN107688269A - Using the novel straight down type backlight source device of wavelength convert principle - Google Patents
Using the novel straight down type backlight source device of wavelength convert principle Download PDFInfo
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- CN107688269A CN107688269A CN201610631666.6A CN201610631666A CN107688269A CN 107688269 A CN107688269 A CN 107688269A CN 201610631666 A CN201610631666 A CN 201610631666A CN 107688269 A CN107688269 A CN 107688269A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 230000005284 excitation Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000002096 quantum dot Substances 0.000 claims description 5
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 10
- 208000027418 Wounds and injury Diseases 0.000 abstract description 9
- 208000014674 injury Diseases 0.000 abstract description 9
- 239000003086 colorant Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
A kind of novel straight down type backlight source device using wavelength convert principle, including the back light being disposed adjacent and reflecting layer, described back light is included along optical axis direction successively spaced excitation source, wavelength conversion layer and filter layer, the excitation source uses UV laser or short wavelength's blue laser, and wave-length coverage is 300-410nm；The wavelength conversion layer is used to UV light or short wavelength's blue light being converted to the outgoing of red, green, blue three coloured light；The filter layer is used for the light for reflecting UV or short wavelength's blue wave band, while transmits the light of visible light wave range；Reflecting layer is provided with the back side of the excitation source；Light source of the emergent light of the filter layer as display device.It is an advantage of the invention that：It is dangerous caused by laser is as laser direct projection human body in the wavelength conversion type light source of excitaton source, is effectively avoided, and solve the injury of near ultraviolet and short wavelength's blue light for human eye, display picture speckle issue caused by solving LASER Light Source.Both security has been taken into account, has taken into account display performance again.
Description
Technical field
The present invention relates to a kind of novel straight down type backlight source device using wavelength convert principle, as liquid crystal display
Back light.
Background technology
LASER Light Source starts extensive use in projection, flat display field at present.Due to tricolor laser technology not into
It is ripe, 1 one-wavelength laser of generally use+other light sources (LED light source or fluorescent material stimulated lighting devices).
Such as the laser backlight scheme that earliest Mitsubishi announces, using red laser+indigo plant, the form of green light LED.Due to
Used using red laser as light source, red laser part may have compared with major injury to human eye and health, bring simultaneously
Speckle noise in display picture.
And the mixing light source of one-wavelength laser+fluorescent material stimulated luminescence, generally use blue laser（Generally 440nm-
470nm）As excitaton source, red, green two kinds of fluorescent material is finally accomplished that blue laser+red is excited as the light source that is stimulated
Light source+green is excited the mixing light source of light source.Blue light in mixing light source is the laser of single wavelength, while for launching efficiency
Consider, the wavelength of blue light is general shorter.Therefore the blue light ingredient in mixing light source has to human eye and health compared with major injury, together
When there is also picture speckle noise problem.
Photopeak science and technology already allows for above mentioned problem at present, starts to develop correlation technique and has applied for patent.Its is typical
Patent is " light source and its secondary excitation method based on wavelength convert "（Number of patent application 201010531498.6）：First peak value
The excitation source of the exciting light (UV light) of wavelength, using the first optical wavelength conversion material, has for absorbing exciting light and exciting
The light of second peak wavelength（Blue light）；Include the second optical wavelength conversion material simultaneously, there is the second peak wavelength for absorbing this
Light and excite with the 3rd peak wavelength（Feux rouges, green glow）Stimulated luminescence.Such a way can effectively avoid original light source straight
Pick out the problem of penetrating.But be necessarily greatly affected as a result of the mode of secondary excitation, efficiency, while blue light is both
Light is penetrated, and is the excitaton source of the 3rd peak wavelength simultaneously, for guaranteed efficiency, the wavelength of blue light is generally shorter, is directly emitted meeting
Human eye is produced compared with major injury.
The content of the invention
The present invention is intended to provide a kind of novel straight down type backlight source device using wavelength convert principle, is solved with laser
As following problems existing for the display light source of excitaton source： 1）Because wavelength is short, energy is high, easily human body is damaged；2）
The blue light harm of display light source；3）Laser is directly as display picture speckle noise problem caused by display light source.
The technical scheme is that：A kind of novel straight down type backlight source device using wavelength convert principle, including
The back light being disposed adjacent and reflecting layer, it is characterised in that described back light includes being spaced successively along optical axis direction setting
Excitation source, wavelength conversion layer and the filter layer put, the excitation source use UV laser or short wavelength's blue laser, wave-length coverage
For 300-410nm；The wavelength conversion layer is used to UV light or short wavelength's blue light being converted to the outgoing of red, green, blue three coloured light；The filter
Photosphere is used for the light for reflecting UV or short wavelength's blue wave band, while transmits the light of visible light wave range；At the back side of the excitation source
Provided with reflecting layer；Light source of the emergent light of the filter layer as display device.
It is an advantage of the invention that：In laser as in the wavelength conversion type light source of excitaton source, laser direct projection effectively prevent
It is dangerous caused by human body, and solve the injury of near ultraviolet or short wavelength's blue light for human eye, while effectively eliminate display picture
Face speckle issue.Both security has been taken into account, has taken into account display performance again.
Brief description of the drawings
Fig. 1 is the essential structure schematic diagram for the light source that the present invention uses；
Fig. 2 is the structural representation of the embodiment of the present invention.
Embodiment
Referring to Fig. 1, the present invention is a kind of to be included using the novel straight down type backlight source device embodiment of wavelength convert principle：
It is reflecting layer 4, UV or short wavelength's blue laser light source 1, diffusion layer 5, the filter layer 3 of wavelength conversion layer 2 and increasing successively from bottom to up
Photosphere 6, each layer feature are as follows：
1）The wave-length coverage of UV or short wavelength's blue laser light source 1 is 300-410nm.UV or short wavelength's blue laser light source 1 are close
It is enclosed in the cavity being made up of reflecting layer 4 and diffusion layer 5.
2）The reflected wavelength range in reflecting layer 4 is 300-650nm.
3）Diffusion layer 5 is typically made up of diffuser plate, is mainly used in spreading light source, is made the light source for inciding wavelength conversion layer equal
It is even, while played a supporting role to several layers of above.
4）Wavelength conversion layer 2, main function are to absorb UV or short wavelength's blue light, by UV or short wavelength's blue light be converted to it is red,
Green, blue three color light outgoing.Wherein, blue light wavelength is 460-480nm.This wavelength both ensure that UV or short wavelength's blue light excited
The efficiency of conversion, reduce the injury to human eye；Green wavelength is 530-570nm；Red light wavelength is 620-640nm.
Wavelength conversion layer 2 can use quantum dot material thin-layer, and feature is that the light that can absorb shorter wavelength is launched compared with long wave
Long light.The peak wavelength of emergent light is controlled by the particle diameter of quantum dot, can be accurately obtained required wavelength, and have
Narrower half-wave is wide.
5）The effect of filter layer 3 is reflection UV or short wavelength's blue wave band（300—410nm）Light, while transmit visible
Optical band（450—650nm）Light.Filter layer 3 is by excitation source（Ultraviolet or short wavelength's blue light）It is blocked in final emergent light
Outside so that user avoids injury caused by laser, short wavelength's blue light.
6）Lustre adding layer 6 is optional layer, needs to configure according to actual conditions, is typically made up of DBEF or BEF, plays raising
The effect of the utilization rate of light.
7）The emergent light of filter layer 3 is white light, includes the light of red, green, blue three primary colours.If the wavelength conversion layer amount of employing
Son point material, the half-wave of the light of the red, green, blue three primary colours of the white light of outgoing is wide can be in below 40nm.
Referring to Fig. 2, the novel backlight light source using wavelength convert principle of foundation of the present invention, including along optical axis direction successively
Spaced excitation source 1, wavelength conversion layer 2 and filter layer 3, principal character is as follows：
1）Excitation source 1 is UV laser or short wavelength's blue laser, and wave-length coverage is 300-410nm.
2）Wavelength conversion layer 2, main function are to absorb UV light or short wavelength's blue light, and UV light or short wavelength's blue light are converted to
Red, green, blue three coloured light is emitted.Wherein：
Blue light wavelength is 460-480nm.This wavelength both ensure that UV light or short wavelength's blue light excited the efficiency of conversion, drop again
The low injury to human eye.
Green wavelength is 530-570nm.
Red light wavelength is 620-640nm.
Wavelength conversion layer 2 can use quantum dot material thin-layer, and feature is that the light that can absorb shorter wavelength is launched compared with long wave
Long light.The wavelength of emergent light is controlled by the particle diameter of quantum dot, can be accurately obtained required wavelength, and have narrower
Half-wave it is wide.
3）The effect of filter layer 3 is reflection UV or short wavelength's blue wave band（300—410nm）Light, while transmit visible
Optical band（450—650nm）Light.The effect of filter layer 3 is by excitation source（Ultraviolet light or short wavelength's blue light）It is blocked in most
Outside whole emergent light so that user avoids injury caused by laser, short wavelength's blue light.
4）The emergent light of filter layer 3 is white light, includes the light of red, green, blue three primary colours.If wavelength conversion layer 2 employs
Quanta point material, the half-wave of the light of the red, green, blue three primary colours of the white light of outgoing is wide can be in below 40nm.Applied to liquid crystal
Show or Projection Display will obtain higher gamut range（>100%NTSC）.
Claims (5)
1. a kind of novel straight down type backlight source device using wavelength convert principle, including the back light being disposed adjacent and anti-
Penetrate layer 4, it is characterised in that described back light is included along optical axis direction successively spaced excitation source 1, wavelength convert
Layer 2 and filter layer 3, the excitation source 1 use UV laser or short wavelength's blue laser, and wave-length coverage is 300-410nm；The ripple
Long conversion layer 2 is used to UV light or short wavelength's blue light being converted to the outgoing of red, green, blue three coloured light；The filter layer 3 be used for reflect UV or
The light of short wavelength's blue wave band, while transmit the light of visible light wave range；Reflecting layer 4 is provided with the back side of the excitation source 1；The filter
Light source of the emergent light of photosphere 3 as display device.
2. the novel straight down type backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Lustre adding layer 6 is provided with the light emission side of described filter layer 3, the lustre adding layer 6 is made up of DBEF or BEF, plays the profit for improving light
With the effect of rate.
3. the novel straight down type backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Diffusion layer 5 is provided between the excitation source 1 and wavelength conversion layer 2, for spreading light source, makes the light for inciding wavelength conversion layer
Source is uniform, while is played a supporting role to several layers of above.
4. the novel straight down type backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
The wave-length coverage of described excitation source 1 is 300-410nm, is sealed in the cavity being made up of reflecting layer 4 and diffusion layer 5.
5. the novel straight down type backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Described wavelength conversion layer 2 changes the blue light wavelength of outgoing as 460-480nm, and green wavelength is 530-570nm, red light wavelength
For 620-640nm；The wavelength conversion layer 2 is quanta point material thin layer, can absorb the light transmitting longer wavelength of shorter wavelength
Light, the peak wavelength of emergent light are controlled by the particle diameter of quantum dot, can be accurately obtained required wavelength, and have narrower
Half-wave it is wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631666.6A CN107688269A (en) | 2016-08-04 | 2016-08-04 | Using the novel straight down type backlight source device of wavelength convert principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631666.6A CN107688269A (en) | 2016-08-04 | 2016-08-04 | Using the novel straight down type backlight source device of wavelength convert principle |
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| Publication Number | Publication Date |
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| CN107688269A true CN107688269A (en) | 2018-02-13 |
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| CN201610631666.6A Pending CN107688269A (en) | 2016-08-04 | 2016-08-04 | Using the novel straight down type backlight source device of wavelength convert principle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616577A (en) * | 2018-10-26 | 2019-04-12 | 纳晶科技股份有限公司 | A kind of quantum dot film and preparation method thereof |
| WO2020000858A1 (en) * | 2018-06-26 | 2020-01-02 | 惠科股份有限公司 | Light-emitting component and display device |
| CN112670379A (en) * | 2020-12-24 | 2021-04-16 | 广东省科学院半导体研究所 | Micro LED structure and color display device |
| CN113491018A (en) * | 2019-02-26 | 2021-10-08 | 凸版印刷株式会社 | Wavelength selective filter, method for manufacturing wavelength selective filter, and display device |
| CN115376401A (en) * | 2021-05-20 | 2022-11-22 | 台湾扬昕股份有限公司 | Display device |
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