CN107688270A - Using the novel side-light backlight source device of wavelength convert principle - Google Patents
Using the novel side-light backlight source device of wavelength convert principle Download PDFInfo
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- CN107688270A CN107688270A CN201610631846.4A CN201610631846A CN107688270A CN 107688270 A CN107688270 A CN 107688270A CN 201610631846 A CN201610631846 A CN 201610631846A CN 107688270 A CN107688270 A CN 107688270A
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- light
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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)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
A kind of novel side-light backlight source device using wavelength convert principle, including back light and reflecting layer, the back light includes using UV laser or short wavelength's blue laser along optical axis direction successively spaced excitation source, wavelength conversion layer and filter layer, the excitation source；The wavelength conversion layer is used to UV 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；The excitation source is located at one end of a light guide plate as side-light backlight light source, and the reflecting layer is provided with the back side of the light guide plate, and diffusion layer is set in the front of the light guide plate.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 and display performance have been taken into account.
Description
Technical field
The present invention relates to a kind of novel side-light 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 side-light 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 side-light 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；The excitation source is as sidelight
Formula back light is located at one end of a light guide plate, is provided with the reflecting layer at the back side of the light guide plate, is set in the front of the light guide plate
Put diffusion layer, the light source of the front emergent light of diffusion 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 structural representation of the embodiment of the present invention；
Fig. 2 is Fig. 1 A-A sectional views（Without shell）.
Fig. 3 is the essential structure schematic diagram for the light source that the present invention uses.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of novel side-light backlight source device using wavelength convert principle of the invention, aobvious
Show that the side of structure sets back light, and in shell 9.Show that structure is reflecting layer 8, light guide plate successively from bottom to up
7th, diffusion layer 5 and lustre adding layer 6.Back light includes UV or short wavelength's blue light source 1, wavelength conversion layer 2 and filter layer 3, is leading
The incident side coating of tabula rasa 7 sticks filter layer 3, and filter layer 3 sets wavelength conversion layer 2, wavelength back to the side of light guide plate
The opposite side of conversion layer 2 sets a row UV or short wavelength's blue light source 1.Each several part feature is as follows：
1）The wave-length coverage of UV or short wavelength's blue light source 1 is 300-410nm.
2）The reflected wavelength range in reflecting layer 8 is 450-650nm.
3）Light guide plate 7 is transparent PMMA or PS materials, or inorganic glass materials, light guide plate 7 press close to reflecting layer 8
Face printing net-point, play even light action.The side coating of light guide plate 7 sticks UV or short wavelength's blue light filter layer 3, filters
Layer 3 reflects UV or short wavelength's blue wave band（300—410nm）Light, while transmit visible light wave range（450—650nm）.
4）The main function of wavelength conversion layer 2 is 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 again
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）Diffusion layer 5 is used to be emitted light uniformization to light guide plate 7.
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 diffusion layer 5 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. 3, a kind of novel backlight light supply apparatus using wavelength convert principle of the invention, the base of used light source
This structure 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 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 again
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.
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 outside final emergent light,
So that user avoids injury caused by laser, short wavelength's blue light.
4）Emergent light is white light, includes the light of red, green, blue three primary colours.If wavelength conversion layer 2 employs quantum dot material
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 display or throwing
Shadow, which is shown, to obtain higher gamut range（>100%NTSC）.
Claims (6)
1. a kind of novel side-light 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；The excitation source 1 is located at one as side-light backlight light source
One end of light guide plate 7, the reflecting layer 4 is provided with the back side of the light guide plate 7, diffusion layer 5 is set in the front of the light guide plate 7, expanded
Dissipate light source of the light of the front injection of layer 5 as display device.
2. the novel side-light 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 diffusion layer 5, 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 side-light backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Described filter layer 3 is coated with or sticked on the one end of light guide plate 7, and the filter layer 3 sets back to the side of light guide plate 7 and led with this
Wavelength conversion layer 2 corresponding to one end of tabula rasa 7, the opposite side of the wavelength conversion layer 2 set a row UV or short wavelength's blue light source
1。
4. the novel side-light backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Described light guide plate 7 is made of transparent PMMA, PS material or inorganic glass materials, presses close to the face in reflecting layer 4 in the light guide plate 7
Printing net-point, play even light action.
5. the novel side-light backlight source device according to claim 1 using wavelength convert principle, it is characterised in that
Described diffusion layer 5 is used to be emitted light uniformization to light guide plate 7.
6. the novel side-light 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 uses quanta point material, 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 |
|---|---|---|---|
| CN201610631846.4A CN107688270A (en) | 2016-08-04 | 2016-08-04 | Using the novel side-light backlight source device of wavelength convert principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631846.4A CN107688270A (en) | 2016-08-04 | 2016-08-04 | Using the novel side-light backlight source device of wavelength convert principle |
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| Publication Number | Publication Date |
|---|---|
| CN107688270A true CN107688270A (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610631846.4A Pending CN107688270A (en) | 2016-08-04 | 2016-08-04 | Using the novel side-light backlight source device of wavelength convert principle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989242A (en) * | 2019-12-06 | 2020-04-10 | Tcl华星光电技术有限公司 | Backlight module and display device |
| CN112540498A (en) * | 2019-09-20 | 2021-03-23 | 精工爱普生株式会社 | Wavelength conversion element, light source device, and projector |
| CN115376401A (en) * | 2021-05-20 | 2022-11-22 | 台湾扬昕股份有限公司 | Display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210326A1 (en) * | 2006-03-09 | 2007-09-13 | Makoto Kurihara | Lighting device and display device provided with the same |
| CN205139535U (en) * | 2015-11-30 | 2016-04-06 | 信利半导体有限公司 | Display module assembly and LCD |
| CN205910485U (en) * | 2016-08-04 | 2017-01-25 | 青岛蓝之虹光电技术有限公司 | Use wavelength transformation principle's novel side light type light source device in a poor light |
-
2016
- 2016-08-04 CN CN201610631846.4A patent/CN107688270A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210326A1 (en) * | 2006-03-09 | 2007-09-13 | Makoto Kurihara | Lighting device and display device provided with the same |
| CN205139535U (en) * | 2015-11-30 | 2016-04-06 | 信利半导体有限公司 | Display module assembly and LCD |
| CN205910485U (en) * | 2016-08-04 | 2017-01-25 | 青岛蓝之虹光电技术有限公司 | Use wavelength transformation principle's novel side light type light source device in a poor light |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540498A (en) * | 2019-09-20 | 2021-03-23 | 精工爱普生株式会社 | Wavelength conversion element, light source device, and projector |
| CN112540498B (en) * | 2019-09-20 | 2022-08-23 | 精工爱普生株式会社 | Wavelength conversion element, light source device, and projector |
| CN110989242A (en) * | 2019-12-06 | 2020-04-10 | Tcl华星光电技术有限公司 | Backlight module and display device |
| US11435515B2 (en) | 2019-12-06 | 2022-09-06 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module 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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