CN104536247A - Light source system and projector based on nonlinear luminous element - Google Patents
Light source system and projector based on nonlinear luminous element Download PDFInfo
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- CN104536247A CN104536247A CN201410632947.4A CN201410632947A CN104536247A CN 104536247 A CN104536247 A CN 104536247A CN 201410632947 A CN201410632947 A CN 201410632947A CN 104536247 A CN104536247 A CN 104536247A
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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
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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
- G02F1/35—Non-linear optics
Abstract
The invention discloses a light source system and a projector based on a nonlinear luminous element. The light source system comprises a light source, a tunable nonlinear luminous element and a tuning device, wherein the light source is used for outputting visible light to the tunable nonlinear luminous element, the tunable nonlinear luminous element is used for changing wave length of the input visible light and then outputting the light with the wave length changed, the tuning device is used for driving the tunable nonlinear luminous element to change the wave length of the visible light with at least one variable quantity, so that the light output from the tunable nonlinear luminous element has changeable wave length. The wave length of the visible light is changed by the tunable nonlinear luminous element, and the tuning device acts on the tunable nonlinear luminous element to change the wave length variable quantity of the tunable nonlinear luminous element, so that the tunable nonlinear luminous element can output the light of different wave lengths, and furthermore, the coherence of output light is reduced.
Description
Technical field
The present invention relates to projection art, particularly relate to a kind of light-source system based on non-linear light-emitting component and projector.
Background technology
The use of current a lot of equipment all needs light source, and such as LCDs, projector etc. need the equipment being presented image by light to people.From above-described equipment, good visual effect is experienced in order to enable user, people have carried out large quantifier elimination for the light source in equipment, and remaking output after bringing into use optical element to process light source, these are referred to as light-source system for the treatment of with the element exporting light.
For projector, its light-source system is generally divided into two kinds, one is that ultrahigh pressure mercury lamp is as light source, the life-span of this bulb, generally between 2000 hours to 4000 hours, along with the growth of bulb working time, there will be brightness deterioration, the problem that projected image quality reduces, and bulb is as the unique consumptive material of projector, and its price comparison is high, and therefore user uses projector's cost compare large; Another kind is LASER Light Source, the main laser diode using present development, and it has low energy consumption, high brightness, the life-span is long, color is pure, colour gamut is high and the advantage such as switch at any time.But the coherence of light that LASER Light Source exports is comparatively large, interferes, easily cause the problem of speckle when being irradiated on projection screen.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of light-source system based on non-linear light-emitting component and projector, can reduce the coherence exporting light.
For solving the problems of the technologies described above, the invention provides a kind of light-source system based on non-linear light-emitting component, comprising: light source, tunable non-linear light-emitting component and tuner; Wherein, light source is for exporting visible ray to tunable non-linear light-emitting component; Tunable non-linear light-emitting component, the wavelength for the visible ray to input converts, and is exported by the light after conversion; Tuner converts with the wavelength of at least one converted quantity to visible ray for driving tunable non-linear light-emitting component, makes from the wavelength of light of tunable non-linear light-emitting component output variable.
Wherein, tunable non-linear light-emitting component is electroluminescent non-linear light-emitting component, and tuner is variable voltage management devices; Variable voltage management devices alternately applies at least two voltages to electroluminescent non-linear light-emitting component, makes electroluminescent non-linear light-emitting component carry out checker with at least two variable quantities to the wavelength of visible ray accordingly, alternately to export the light of at least two kinds of wavelength.
Wherein, visible ray is laser, and laser is one or more in ruddiness, green glow and blue light.
Wherein, laser comprises the first ruddiness, the first green glow and the first blue light, when described tuner does not work, after described tunable non-linear light-emitting component input described first ruddiness, the first green glow and the first blue light, export described first ruddiness, the first green glow and the first blue light, when described tuner work, after described tunable non-linear light-emitting component input described first ruddiness, the first green glow and the first blue light, the second ruddiness, the second green glow and the second blue light after output wavelength conversion.
Wherein, light-source system comprises light path control device further, connects described light source and described tunable non-linear light-emitting component, for controlling the transmission path of described light source and described tunable non-linear light-emitting component output light.
Wherein, light path control device is at least one in photoswitch and photo-coupler.
For solving the problems of the technologies described above, the invention provides a kind of projector based on non-linear light-emitting component, comprising light-source system and light valve; Light-source system comprises: light source, tunable non-linear light-emitting component and tuner; Wherein, light source is for exporting visible ray to tunable non-linear light-emitting component; Tunable non-linear light-emitting component, the wavelength for the visible ray to input converts, and exports the light after conversion to light valve; Tuner converts with the wavelength of at least one converted quantity to visible ray for driving tunable non-linear light-emitting component, makes from the wavelength of light of tunable non-linear light-emitting component output variable.
Wherein, tunable non-linear light-emitting component is electroluminescent non-linear light-emitting component, and tuner is variable voltage management devices; Variable voltage management devices alternately applies at least two voltages to electroluminescent non-linear light-emitting component, makes electroluminescent non-linear light-emitting component carry out checker with at least two variable quantities to the wavelength of visible ray accordingly, alternately to export the light of at least two kinds of wavelength.
Wherein, visible ray is laser, and described laser is one or more in ruddiness, green glow and blue light.
Wherein, light-source system comprises photoswitch and photo-coupler further; Photoswitch is arranged between light source and tunable non-linear light-emitting component, and the visible ray exported for making light source exports along separate routes; After photo-coupler is arranged at tunable non-linear light-emitting component, the light for making tunable non-linear light-emitting component export closes road and exports.
The invention has the beneficial effects as follows: be different from prior art, light source of the present invention exports visible ray to tunable non-linear light-emitting component, tuner acts on tunable non-linear light-emitting component, order about the visible wavelength of tunable non-linear light-emitting component to input to convert with a converted quantity, and the light after conversion is exported, tuner periodically can order about tunable non-linear light-emitting component with different converted quantities conversion wavelength of light and light after output transform wavelength, to reduce the correlativity exporting light.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of the light-source system that the present invention is based on non-linear light-emitting component;
Fig. 2 is the thermal tuning curve synoptic diagram of the tunable non-linear light-emitting component of the embodiment of light-source system first shown in Fig. 1;
Fig. 3 is the structural representation of the second embodiment of the light-source system that the present invention is based on non-linear light-emitting component;
Fig. 4 is the structural representation of invention based on the first embodiment of the projector of non-linear light-emitting component.
Embodiment
Consult Fig. 1, Fig. 1 is the structural representation of the first embodiment of the light-source system that the present invention is based on non-linear light-emitting component, present embodiments provide for a kind of light-source system 100, comprises light source 101, tunable non-linear light-emitting component 102 and tuner 103.
Light source 101 is for exporting visible ray to tunable non-linear light-emitting component 102.
In general, light source 101 can white light source or LASER Light Source, and white light source generally adopts LED light emitting diode, can be divided into monocrystalline and polycrystalline two type according to usage quantity.Polymorphous light emitting diode, i.e. two or more complementary two look LED light emitting diodes or primitive colours LED light emitting diodes, but the driving voltage of the LED light emitting diode of different colours, temperature characterisitic and life-span are different; Monocrystalline LED light emitting diode, namely a monochromatic LED light emitting diode adds corresponding fluorescent powder, in order to improve luminescence efficiency, general ultraviolet leds adds the trichromatic three wavelength fluorescent powder of RGB to reach the effect of white light, and blue-ray LED also can be selected to excite yellow fluorescent powder.
LASER Light Source, it has, and monochromaticity is good, high directivity and the high advantage of luminance brightness.Because light source in present embodiment 101 needs by transmission of visible light to tunable non-linear light-emitting component 102, therefore, light source 101 selects LASER Light Source, and LASER Light Source is the electric light source utilizing excited state particle luminous under stimulated radiation effect, is a kind of coherent source.Present embodiment produces LASER Light Source by semiconductor laser and semiconductor laser diode, driving source and the actuating medium with metastable level is included in laser instrument, lasing light emitter is semiconductor, and realize by the excitation of electrical pumping formula and maintain population inversion, optical pumping formula and high-power electron beam Exciting-simulator system can be adopted in other embodiments to encourage; The actuating medium with metastable level is to make stimulated radiation occupy an leading position, thus realizes light amplification.This semiconductor laser comprises resonator cavity further, and resonator cavity can make the photon in chamber have consistent frequency, phase place and traffic direction, thus makes laser have good directivity and coherence.
Because Laser Study application is extensively, be therefore also optionally in other embodiments the gas laser of lasing light emitter in order to gas or take liquid as the liquid laser of lasing light emitter.Do not limit in this selection to laser instrument.Because semiconductor laser makes simple, cost is low, and therefore in present embodiment, preferred semiconductor laser instrument is light source 101.Present embodiment realizes the transmission of light by optical fiber.
Tunable non-linear light-emitting component 102, the wavelength for the visible ray to input converts, and is exported by the light after conversion.
The wavelength of tunable non-linear light-emitting component 102 to the visible ray of input converts, in present embodiment, light source 101 is LASER Light Source preferably, therefore in this conversion process, there occurs nonlinear optical effect, and tunable non-linear light-emitting component 102 selects non-linear optical crystal material, based on the principle of optical parametric oscillation in present embodiment, realize the tuning of output light wavelength.Different crystal has the change that angle tuning and thermal tuning all can cause emergent light frequency accordingly respectively, i.e. the change of wavelength.Such as ADP ammonium dihydrogen phosphate crystal is generally tuning by incident angle, and LiNbO
3lithium columbate crystal is generally by thermal tuning, and in present embodiment, tunable non-linear light-emitting component 102 adopts LiNbO
3lithium columbate crystal.
Tuner 103 converts with the wavelength of at least one converted quantity to visible ray for driving tunable non-linear light-emitting component 102, makes from the wavelength of light of tunable non-linear light-emitting component 102 output variable.
Tuner 103 is applied to non-linear light-emitting component 102, can be changed the converted quantity of nonlinear element 102 pairs of wavelength by modes such as angle tuning, thermal tuning or voltage tunings.Refer to Fig. 2, Fig. 2 is the thermal tuning curve synoptic diagram of the tunable non-linear light-emitting component of the embodiment of light-source system first shown in Fig. 1.Thermal tuning curve according to this tunable non-linear light-emitting component 102 regulates temperature, then drives tunable non-linear light-emitting component 102 to convert visible ray with different converted quantities.In this embodiment, tuner 103 can periodically regulate temperature, also can regulate by random carrying out.Such as, at normal temperatures, tunable non-linear light-emitting component 102 exports wavelength of light is λ
0, temperature T
1time, output wavelength of light is λ
1, now tuner 103 can not apply temperature and apply T
1change between temperature, then make the wavelength of light of output at λ
0and λ
1between change, reduce to export the coherence of light.Also the range of adjustment of temperature can be increased as (T
1, T
2..., T
n) between alternately or random variation, then export wavelength of light at (λ
1, λ
2..., λ
n) between corresponding conversion.
Be different from prior art, in present embodiment, light source exports visible ray to tunable non-linear light-emitting component, tuner acts on tunable non-linear light-emitting component, order about the visible wavelength of tunable non-linear light-emitting component to input to convert with a converted quantity, and the light after conversion is exported, tuner periodically can order about tunable non-linear light-emitting component with different converted quantities conversion wavelength of light and light after output transform wavelength, and then can reduce the correlativity exporting light.
Refer to Fig. 3, Fig. 3 is the structural representation of the second embodiment of the light-source system that the present invention is based on non-linear light-emitting component, present embodiments provide for a kind of light-source system 300, comprise light source 301, tunable non-linear light-emitting component 302, tuner 303 and light path control device 304.
Light source 301 is for exporting visible ray to tunable non-linear light-emitting component 302.
In present embodiment, light source 301 is LASER Light Source, and visible ray is laser, laser is one or more in ruddiness, green glow and blue light.If light-source system 300 is used in projector, then LASER Light Source 301 adopts ruddiness, green glow and blue light primaries in the present embodiment.Certainly the LASER Light Source of other colors can also be selected in other embodiments, as ruddiness, gold-tinted, green glow and blue light four primary light or ruddiness, gold-tinted, green glow, green light and blue light five primary lights.If light-source system 300 is used in other equipment, the light of a certain color also only can be selected.
Tunable non-linear light-emitting component 302, the wavelength for the visible ray to input converts, and is exported by the light after conversion.
In present embodiment, tunable non-linear light-emitting component 302 is electroluminescent non-linear light-emitting component, and the light exported through this light-emitting component can change according to the change of voltage.In present embodiment, light source 301 is red green blue tricolor LASER Light Source, and it goes for projector.The light source 301 of projector needs the light that can export RGB three kinds of colors, therefore, three tunable non-linear light-emitting components 302 are set in the present embodiment and change the light that light exports RGB three kinds of colors then respectively, red light wavelength is 620nm ~ 750nm, then the wavelength of light that changes of the tunable non-linear light-emitting component 302 of its correspondence is all within the scope of 620nm ~ 750nm, the tunable non-linear light-emitting component 302 corresponding for green glow and tunable non-linear light-emitting component 302 corresponding to blue light same, the wavelength of the output light that it converts is in green or blue laser wavelengths scope.
Tuner 303 converts with the wavelength of at least one converted quantity to visible ray for driving tunable non-linear light-emitting component 302, makes from the wavelength of light of tunable non-linear light-emitting component 302 output variable.
In present embodiment, tuner 303 is variable voltage management devices, variable voltage management devices alternately applies at least two voltages to electroluminescent non-linear light-emitting component, electroluminescent non-linear light-emitting component is made to carry out checker with at least two variable quantities to the wavelength of visible ray accordingly, alternately to export the light of at least two kinds of wavelength.Concrete, for tunable non-linear light-emitting component 302, when not applying voltage, it exports wavelength of light is λ
0, apply voltage V
1, it exports wavelength of light is λ
1, now tuner 303 can not apply voltage and apply voltage V
1between change, then export wavelength of light at λ
0and λ
1between change, reduce and export the coherence of light.Also alive range of adjustment can be increased as (V
1, V
2..., V
n) between alternately or random variation, then export wavelength of light at (λ
1, λ
2..., λ
n) between corresponding conversion.
In other embodiments, when tuner 303 does not work, tunable non-linear light-emitting component 302 also can not change and then exports the wavelength of input light.Even light source 301 exports the first ruddiness, the first green glow and the first blue light, when tuner 303 does not work, after tunable non-linear light-emitting component 302 inputs the first ruddiness, the first green glow and the first blue light, then export the first ruddiness, the first green glow and the first blue light; When tuner 303 works, after tunable non-linear light-emitting component 302 inputs the first ruddiness, the first green glow and the first blue light, the second ruddiness, the second green glow and the second blue light then after output wavelength conversion.The wavelength of the first ruddiness, the first green glow and the first blue light is different from the wavelength of the second ruddiness, the second green glow and the second blue light.Now tuner 303 can change between working and not working, and then makes the light of output change between two kinds of wavelength.
Light path control device 304, connects light source 301 and tunable non-linear light-emitting component 302, exports the transmission path of light for controlling light source 301 and tunable non-linear light-emitting component 302.Light in present embodiment is transmitted by optical fiber, after processing light, also needs the transmission path of light path control device 304 pairs of light to control.In present embodiment, light path control device 304 comprises photoswitch 3041 and photo-coupler 3042.
Photoswitch 3041 is arranged between light source 301 and tunable non-linear light-emitting component 302, for realizing the shunt transmission of visible ray.In present embodiment, photoswitch 3041 is 1 × 3 photoswitch, the light splitting of its visible ray sequential that light source 301 can be sent is in three light paths, namely any moment only has in a light path has light to input, and is applied in projector, and each light path is corresponding respectively exports red green blue tricolor light.After photo-coupler 3042 is arranged on tunable non-linear light-emitting component 302, carry out being coupled and exporting for the light that tunable non-linear light-emitting component 302 is exported.
In other embodiments, can also by increasing or reduce the number of tunable non-linear light-emitting component, the arrangement mode of change light-source system, replace mode that light path control parts are other optical elements of same function or other means at least export ruddiness, green glow and blue light three primary colours light to realize light-source system, and each monochromatic wavelength of subsequent time all from a moment different.
Be different from prior art, in present embodiment, light source exports visible ray to tunable non-linear light-emitting component, tuner acts on tunable non-linear light-emitting component, order about the visible wavelength of tunable non-linear light-emitting component to input to convert with a converted quantity, and the light after conversion is exported, tunable non-linear light-emitting component can periodically or random conversion wavelength of light by the light after output transform wavelength, can reduce the correlativity exporting light.Further, in light-source system, be also provided with the light path control device such as photoswitch, photo-coupler, the control to light transmission path and transmission time sequence can be realized, then can be applied to the equipment such as projector.
Refer to Fig. 4, Fig. 4 is the structural representation of the first embodiment of the projector that the present invention is based on non-linear light-emitting component, present embodiments provide for a kind of projector 400, comprise light-source system 401 and light valve 402, wherein light-source system 401 comprises light source 4011, tunable non-linear light-emitting component 4012, tuner 4013, photoswitch 4014, photo-coupler 4015.Each element is by Fiber connection, i.e. light rays transmitting via optical fibers above, and the principle of each element and function class are like the second embodiment of light-source system, do not repeat them here.
Needs further illustrate, light source 4011 is for can export ruddiness, the LASER Light Source of green glow and blue light primaries, light source connects photoswitch 4014, photoswitch 4014 can sequential, namely light is dispensed to tunable non-linear light-emitting component 4012 with some cycles, any moment only has a tunable non-linear light-emitting component 4012 to have light to input, tunable non-linear light-emitting component 4012 carries out exporting photo-coupler 4015 to after changing the wavelength of input light, photo-coupler 4015 three tunable non-linear light-emitting components 4012 are exported be optically coupled in a light path, and exported by light valve 402, then red-emitting successively, green glow and blue light are on projection screen.
Wherein, tuner 4013 connects tunable non-linear light-emitting component 4012, for driving tunable non-linear light-emitting component 102 to convert with the wavelength of at least one converted quantity to visible ray, make from the wavelength of light of tunable non-linear light-emitting component 102 output variable.In present embodiment, tuner 4013 periodically regulates the voltage be applied on tunable non-linear light-emitting component 102, the converted quantity of periodically-varied is tunable non-linear light-emitting component 102.Then tunable non-linear light-emitting component 102 periodically can export the ruddiness of different wave length, green glow or blue light, and in other embodiments, what tuner also can be random regulates voltage.
Be different from prior art, in present embodiment, light source of projector exports visible ray and is dispensed to tunable non-linear light-emitting component through photoswitch, tunable non-linear light-emitting component triggers through tuner, convert with the wavelength of certain converted quantity to visible ray, and export photo-coupler to, then transfer to light valve from photo-coupler, be finally emitted to projection screen.Wherein, each tunable non-linear light-emitting component is correspondence output ruddiness, green glow and blue light three coloured light respectively, tuner is by periodically changing voltage, tunable non-linear light-emitting component is enable to export the light of different wave length, to reduce the coherence exporting light, weaken the speckle phenomena on shadow screen.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. based on a light-source system for non-linear light-emitting component, it is characterized in that, described light-source system comprises: light source, tunable non-linear light-emitting component and tuner;
Wherein, described light source is for exporting visible ray to described tunable non-linear light-emitting component;
Described tunable non-linear light-emitting component, the wavelength for the described visible ray to input converts, and is exported by the light after conversion;
Described tuner converts with the wavelength of at least one converted quantity to described visible ray for driving described tunable non-linear light-emitting component, makes from the wavelength of light of described tunable non-linear light-emitting component output variable.
2. light-source system according to claim 1, is characterized in that, described tunable non-linear light-emitting component is electroluminescent non-linear light-emitting component, and described tuner is variable voltage management devices;
Described variable voltage management devices alternately applies at least two voltages to described electroluminescent non-linear light-emitting component, described electroluminescent non-linear light-emitting component is made to carry out checker with at least two variable quantities to the wavelength of described visible ray accordingly, alternately to export the light of at least two kinds of wavelength.
3. light-source system according to claim 1, is characterized in that, described visible ray is laser, and described laser is one or more in ruddiness, green glow and blue light.
4. light-source system according to claim 3, it is characterized in that, described laser comprises the first ruddiness, the first green glow and the first blue light, when described tuner does not work, after described tunable non-linear light-emitting component input described first ruddiness, the first green glow and the first blue light, export described first ruddiness, the first green glow and the first blue light, when described tuner work, after described tunable non-linear light-emitting component input described first ruddiness, the first green glow and the first blue light, the second ruddiness, the second green glow and the second blue light after output wavelength conversion.
5. light-source system according to claim 1, it is characterized in that, described light-source system comprises light path control device further, connects described light source and described tunable non-linear light-emitting component, for controlling the transmission path of described light source and described tunable non-linear light-emitting component output light.
6. light-source system according to claim 5, is characterized in that, described light path control device is at least one in photoswitch and photo-coupler.
7. based on a projector for non-linear light-emitting component, it is characterized in that, described projector comprises light-source system and light valve;
Described light-source system comprises: light source, tunable non-linear light-emitting component and tuner;
Wherein, described light source is for exporting visible ray to described tunable non-linear light-emitting component;
Described tunable non-linear light-emitting component, the wavelength for the described visible ray to input converts, and exports the light after conversion to described light valve;
Described tuner converts with the wavelength of at least one converted quantity to described visible ray for driving described tunable non-linear light-emitting component, makes from the wavelength of light of described tunable non-linear light-emitting component output variable.
8. projector according to claim 7, is characterized in that, described tunable non-linear light-emitting component is electroluminescent non-linear light-emitting component, and described tuner is variable voltage management devices;
Described variable voltage management devices alternately applies at least two voltages to described electroluminescent non-linear light-emitting component, described electroluminescent non-linear light-emitting component is made to carry out checker with at least two variable quantities to the wavelength of described visible ray accordingly, alternately to export the light of at least two kinds of wavelength.
9. projector according to claim 7, is characterized in that, described visible ray is laser, and described laser is one or more in ruddiness, green glow and blue light.
10. the projector according to any one of claim 7-9, is characterized in that, described light-source system comprises photoswitch and photo-coupler further;
Described photoswitch is arranged between described light source and described tunable non-linear light-emitting component, and the visible ray exported for making described light source exports along separate routes;
After described photo-coupler is arranged at described tunable non-linear light-emitting component, the light for making described tunable non-linear light-emitting component export closes road and exports.
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