CN104570381A - Projection display light source and projection display system - Google Patents
Projection display light source and projection display system Download PDFInfo
- Publication number
- CN104570381A CN104570381A CN201510044079.2A CN201510044079A CN104570381A CN 104570381 A CN104570381 A CN 104570381A CN 201510044079 A CN201510044079 A CN 201510044079A CN 104570381 A CN104570381 A CN 104570381A
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- laser
- projection display
- fluorescence
- light source
- light
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- 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
- 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
- G03B21/208—Homogenising, shaping of the illumination light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Lasers (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a projection display light source and a projection display system. Laser is produced from a laser device on the laser side, fluorescence is produced from a fluorescence detector, the laser and the fluorescence can be mixed to form a beam of mixed light through a light filter, and the mixed light serves as incident light, so that speckle produced from the laser is visually improved, and speckle of the mixed light produced from the projection display light source is not obvious.
Description
Technical field
The present invention relates to a kind of projection display light source and projection display system, belong to field of projection display.
Background technology
At present, the field of projection display system application gets more and more, and projection display system mainly comprises light source, light engine and light valve.Light source at present for Projection Display has high-pressure sodium lamp, LED light source and LASER Light Source etc., wide owing to having colour gamut with laser as the image that the light source of Projection Display produces, the advantage that color is beautiful.Therefore, LASER Light Source technology has become high-end technology of greatest concern in field of projection display systems.But, because the coherence of laser is stronger, so there is the problem of serious speckle as light source with laser.
Summary of the invention
The present invention carries out to solve above-mentioned problem, and object is to provide the unconspicuous projection display light source of a kind of speckle phenomena and projection display system.
The present invention, in order to solve the problem, have employed following structure:
< structure one >
The invention provides a kind of projection display light source, for providing speckle phenomena unconspicuous incident light, it is characterized in that, comprise: laser side laser instrument, produce laser; Fluorescence device, produces the fluorescence consistent with described laser color; And optical filter, for laser and described fluorescence being carried out mixing a branch of mixed light of rear formation, mixed light is incident light.
In projection display light source provided by the invention, can also have such feature: wherein, fluorescence can through optical filter, and laser can be reflected by optical filter, forms a branch of mixed light.
In projection display light source provided by the invention, can also have such feature: wherein, laser can through optical filter, and fluorescence can be reflected by optical filter, forms a branch of mixed light.
In projection display light source provided by the invention, can also have such feature: projection display light source also has dodging device, be arranged in the light path of mixed light, mixed light can be carried out Homogeneous phase mixing by dodging device.
In projection display light source provided by the invention, such feature can also be had: wherein, fluorescence device comprises: fluorescence side laser instrument, collimation lens, condenser lens and the phosphor plate be successively set in excitation laser light path that fluorescence side laser instrument sends, optical filter is arranged between collimation lens and condenser lens, and phosphor plate comprises phosphor powder layer and reflectance coating.
In projection display light source provided by the invention, can also have such feature: wherein, phosphor plate is fixed on the side of condenser lens, be focused lens focus laser can excitated fluorescent powder plate fixed area phosphor powder layer produce fluorescence.
In projection display light source provided by the invention, such feature can also be had: wherein, fluorescence device also comprises motor, and motor can drive phosphor plate to rotate, and the laser being focused lens focus excitated fluorescent powder plate can produce fluorescence by the fluorescent powder of zones of different.
< structure two >
Present invention also offers a kind of projection display system, for the outstanding color beautiful and unconspicuous image of speckle phenomena of projection on screen, it is characterized in that, comprise: projection display light source, comprise: the laser instrument for generation of laser, the fluorescence device for generation of the fluorescence consistent with laser color and the optical filter for laser and fluorescence being mixed into a branch of mixed light; Light engine, for transmitting from projection display light source mixed light out, and light valve, the light sent by light engine is modulated.
The effect of invention and effect
According to projection display light source of the present invention, because laser side laser instrument produces laser, fluorescence device produces fluorescence, laser and fluorescence can carry out being mixed to form a branch of mixed light by optical filter, mixed light is as incident light, make the speckle phenomena visually improving laser generation, so the speckle phenomena of the mixed light of projection display light source of the present invention generation is not obvious.
Accompanying drawing explanation
Fig. 1 is the structural representation of projection display light source in embodiments of the invention one;
Fig. 2 is the wavelength-transmitance spectrogram of projection display light source in embodiments of the invention one;
Fig. 3 is the structural representation of projection display light source in embodiments of the invention two; And
Fig. 4 is the structural representation of projection display system in embodiments of the invention three.
Embodiment
The technological means realized to make the present invention, creation characteristic, reach object and effect is easy to understand, the embodiment of projection display light source of the present invention and projection display system is described below in conjunction with accompanying drawing.
< embodiment one >
Fig. 1 is the structural representation of projection display light source in embodiments of the invention one.
As shown in Figure 1, projection display light source 100 is for providing speckle phenomena unconspicuous incident light, and projection display light source 100 comprises: laser side laser instrument 10, fluorescence device 20 and optical filter 30.
Laser side laser instrument 10 produces red laser.
Fluorescence device 20 produces red fluorescence.Fluorescence device 20 comprises: fluorescence side laser instrument 21, collimation lens 22, condenser lens 23 and fluorescent plate 24.
Fluorescence side laser instrument 21 produces laser, as excitation laser.Collimation lens 22, condenser lens 23 and fluorescent plate 24 are arranged in the light path of excitation laser, and collimation lens 22, condenser lens 23 and fluorescent plate 24 be arranged in parallel.Excitation laser is adjusted to parallel laser by collimation lens 22.Parallel laser enters condenser lens 23 after mating plate 30 after filtration, and parallel laser is focused after lens 23 focus on and pools a laser facula in phosphor plate 24.
Optical filter 30, is arranged between collimation lens 22 and condenser lens 23, is 45 ° with the angle of collimation lens 22 and condenser lens 23, has through red laser and the effect of reflect red fluorescence.
Phosphor plate 24 comprises Red phosphor layer and reflectance coating.The red fluorescence powder layer region at laser facula place is excited and sends red fluorescence, because light-emitting phosphor is isotropy, so a part of fluorescence directive condenser lens 23, another part fluorescence directive reflectance coating, the fluorescence of directive reflectance coating by after reflecting film reflects with the fluorescence of directive condenser lens 23 common directive condenser lens 23, the red fluorescence of incidence is become directive optical filter 30 after parallel fluorescence by condenser lens 23, and the red fluorescence inciding optical filter 30 is reflected by optical filter 30.
The angle of the laser that laser side laser instrument 10 sends and optical filter 30 is 45 °, and laser incides optical filter 30 and through optical filter 30.
Optical filter 30 by the fluorescence of reflection with through laser carry out being mixed to form with a branch of mixed light.
Fig. 2 is the wavelength-transmitance spectrogram of projection display light source in embodiments of the invention one.
As shown in Figure 2, thick dot-and-dash line curve is excitation laser spectrum, and thin dashed line curve is red laser spectrum, and block curve is fluorescence spectrum, and dashed curve is that optical filter 30 is through spectrum.As can be seen from the figure excitation laser and the complete transmission filter 30 of red laser, red fluorescence major part reflect by optical filter 30.
Projection display light source 100 also comprises dodging device 40, dodging device is arranged in the light path of mixed light, after mixed light enters dodging device 40, mixed light carries out being uniformly mixed to form uniform mixed light by dodging device 40, and uniform mixed light is the incident light of Projection Display.
Red fluorescence and red laser all belong to ruddiness, and red fluorescing frequencies is wider, be less likely to occur to interfere, red fluorescence and red laser are mixed to form mixed light, due to adding of red fluorescence, the brightness making red laser interfere the bright dark areas of formation obtains equal raising, thus the brightness ratio between the bright blackening point of image is reduced, therefore the picture speckle phenomena seen of observer is just not obvious, thus effectively reduces laser speckle problem.
The effect of embodiment one and effect
According to the projection display light source of embodiment one, because laser side laser instrument produces laser, fluorescence device produces fluorescence, laser and fluorescence can carry out being mixed to form a branch of mixed light by optical filter, mixed light is as incident light, make the speckle phenomena visually improving laser generation, so the speckle phenomena of the mixed light of projection display light source of the present invention generation is not obvious.
In addition, the red fluorescence that fluorescence device produces is the red fluorescence produced by the red phosphor powder layer of laser excitation, therefore fluorescence intensity is higher, the mixed light be mixed to form with red laser and the high red fluorescence of intensity is as incident light, more effectively improve the speckle phenomena that laser produces, so the speckle phenomena of the mixed light of the projection display light source generation of the present embodiment is more not obvious.
< embodiment two >
For structure identical with embodiment one in embodiment two, adopt identical numbering and omit related description.
Fig. 3 is the structural representation of projection display light source in embodiments of the invention two.
As shown in Figure 3, projection display light source 100 comprises: laser side laser instrument 10, fluorescence device 20 and optical filter 30.
Fluorescence device 20 comprises: fluorescence side laser instrument 21, collimation lens 22, condenser lens 23, fluorescent plate 24 and motor 25.
Visible, the projection display light source 100 in the present embodiment two is compared with embodiment one, and difference is only motor 25.In the present embodiment two, motor 25 can drive fluorescent plate 24 to rotate.Along with the rotation of phosphor plate 24, parallel laser is focused after lens 23 focus on can pool laser facula in the zones of different of the red phosphor powder layer in phosphor plate 24, thus excites the red fluorescent powder of zones of different to produce red fluorescence.
Be excited because the every bit on red phosphor powder layer is all instantaneous, therefore phosphor powder layer will make this regional temperature too high because excitation laser irradiates a certain region always, thus causes local ageing.So improve the utilization factor of the red phosphor powder layer in phosphor plate 25.
In addition, phosphor plate 25 can be divided into multiple region, and zones of different scribbles the fluorescent powder of different colours, and motor 26 drives phosphor plate 25 to turn to zones of different, and the phosphor powder layer of different colours can be excited to send fluorescence.
The effect of embodiment two and effect
According to the projection display light source of embodiment two, except having the effect identical with the projection display light source of embodiment one, because fluorescence device also has motor, motor can drive phosphor plate to rotate, thus improves the utilization factor of phosphor powder layer.
< embodiment three >
Fig. 4 is the structural representation of projection display system in embodiments of the invention three.
For structure identical with embodiment two in embodiment three, adopt identical numbering and omit related description.
As shown in Figure 4, projection display system 400, for the outstanding color beautiful and unconspicuous image of speckle phenomena of projection on screen, comprises projection display light source 100, light engine 200 and light valve 300.
Visible, the projection display system 400 in the present embodiment three is compared with embodiment two, and difference is only light engine 200 and light valve 300.
Projection display light source 100 incident light out enters light engine 202, incident light is delivered to light valve 300 by light engine 20, light valve 300 forms image light by carrying out modulation from light engine 200 light out, then image light to be projected on screen through projection lens and produces image.
The effect of embodiment three and effect
According to the projection display system of embodiment three, have the effect identical with the projection display light source of embodiment two, therefore, the image color that the projection display system of the present embodiment projects on screen is beautiful and even.
Certainly projection display light source involved in the present invention and projection display system are not merely defined in structure in the above-described embodiments.Above content be only the present invention conceive under basic explanation, and according to any equivalent transformation that technical scheme of the present invention is done, all should protection scope of the present invention be belonged to.
Projection display light source in the present embodiment one, embodiment two and embodiment three and projection display system, wherein, optical filter has through laser and the effect of reflected fluorescent light, at projection display light source of the present invention and projection display system, wherein, optical filter also can be have through fluorescence and the optical filter of reflects laser.
Projection display light source in the present embodiment one, embodiment two and embodiment three and projection display system, the laser that wherein laser side laser instrument sends is red laser, at projection display light source of the present invention and projection display system, the laser that wherein laser side laser instrument sends can also be green laser and blue laser etc.
Claims (8)
1. a projection display light source, for providing speckle phenomena unconspicuous incident light, is characterized in that, comprise:
Laser side laser instrument, produces laser;
Fluorescence device, produces the fluorescence consistent with described laser color; And
Optical filter, for described laser and described fluorescence being carried out mixing a branch of mixed light of rear formation, described mixed light is described incident light.
2. projection display light source according to claim 1, is characterized in that:
Wherein, described fluorescence can through described optical filter, and described laser can be reflected by described optical filter, forms a branch of mixed light.
3. projection display light source according to claim 1, is characterized in that:
Wherein, described laser can through described optical filter, and described fluorescence can be reflected by described optical filter, forms a branch of mixed light.
4. projection display light source according to claim 1, is characterized in that, also comprises:
Dodging device, is arranged in the light path of described mixed light, and described mixed light can be carried out Homogeneous phase mixing by described dodging device.
5. projection display light source according to claim 1, is characterized in that:
Wherein, described fluorescence device comprises: fluorescence side laser instrument, collimation lens, condenser lens and the phosphor plate be successively set in excitation laser light path that described fluorescence side laser instrument sends,
Described optical filter is arranged between described collimation lens and described condenser lens,
Described phosphor plate comprises phosphor powder layer and reflectance coating.
6. projection display light source according to claim 5, is characterized in that:
Wherein, described phosphor plate is fixed on the side of described condenser lens, the phosphor powder layer of described phosphor plate fixed area can be excited to produce described fluorescence by the laser that described condenser lens focuses on.
7. projection display light source according to claim 5, is characterized in that:
Wherein, described fluorescence device also comprises motor, and described motor can drive described phosphor plate to rotate, and the fluorescent powder of zones of different in described phosphor plate can be excited to produce described fluorescence by the laser that described condenser lens focuses on.
8. a projection display system, for the outstanding color beautiful and unconspicuous image of speckle phenomena of projection on screen, is characterized in that, comprising:
Projection display light source, comprises: the laser instrument for generation of laser, the fluorescence device for generation of the fluorescence consistent with described laser color and the optical filter for described laser and described fluorescence being mixed into a branch of mixed light;
Light engine, for transmitting from described projection display light source described mixed light out, and
Light valve, modulates the light that described light engine sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044079.2A CN104570381A (en) | 2015-01-28 | 2015-01-28 | Projection display light source and projection display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510044079.2A CN104570381A (en) | 2015-01-28 | 2015-01-28 | Projection display light source and projection display system |
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| CN104570381A true CN104570381A (en) | 2015-04-29 |
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| CN201510044079.2A Pending CN104570381A (en) | 2015-01-28 | 2015-01-28 | Projection display light source and projection display system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044806A (en) * | 2015-09-15 | 2015-11-11 | 杭州科汀光学技术有限公司 | Dichroic mirror with laser beam combination function and projection apparatus |
| CN105116676A (en) * | 2015-09-15 | 2015-12-02 | 杭州科汀光学技术有限公司 | Hybrid laser light source and projector |
| CN106444068A (en) * | 2016-06-24 | 2017-02-22 | 天津大学 | Laser speckle inhibition method |
| WO2022012207A1 (en) * | 2020-07-15 | 2022-01-20 | 成都极米科技股份有限公司 | Mixed light source apparatus and projection display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044806A (en) * | 2015-09-15 | 2015-11-11 | 杭州科汀光学技术有限公司 | Dichroic mirror with laser beam combination function and projection apparatus |
| CN105116676A (en) * | 2015-09-15 | 2015-12-02 | 杭州科汀光学技术有限公司 | Hybrid laser light source and projector |
| CN105116676B (en) * | 2015-09-15 | 2017-04-12 | 杭州科汀光学技术有限公司 | Hybrid laser light source and projector |
| CN106444068A (en) * | 2016-06-24 | 2017-02-22 | 天津大学 | Laser speckle inhibition method |
| WO2022012207A1 (en) * | 2020-07-15 | 2022-01-20 | 成都极米科技股份有限公司 | Mixed light source apparatus and projection display device |
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Application publication date: 20150429 |