CN205691928U - A kind of projection lighting optical path - Google Patents
A kind of projection lighting optical path Download PDFInfo
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- CN205691928U CN205691928U CN201620598003.4U CN201620598003U CN205691928U CN 205691928 U CN205691928 U CN 205691928U CN 201620598003 U CN201620598003 U CN 201620598003U CN 205691928 U CN205691928 U CN 205691928U
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Abstract
This utility model provides a kind of projection lighting optical path, described projection lighting optical path, including: the first light supply apparatus being made up of the first color LED light source and the first collimation lens set, the secondary light source device being made up of the second color LED light source and the second collimation lens set, the green-light source device, the first dichroic mirror and the second dichroic mirror that are made up of blue laser light source and the 3rd collimation lens set and phosphor plate.This projection lighting optical path is simple and reasonable, compact in design, uses blue laser excitated fluorescent powder layer to produce green fluorescence, greatly strengthen green-light source brightness, improve projection quality, solve a difficult problem for LED light source luminance shortage in projection display system.
Description
Technical field
This utility model relates to digital projection Display Technique field, more particularly, it relates to a kind of projection lighting optical path.
Background technology
Along with the development of science and technology, the particularly promotion of semiconductor technology, portable electronic equipment is constantly set
Meter manufactures.The lifting of portable electric appts function so that user is to the requirement of the display device of man machine interface increasingly
Develop towards miniature, giant-screen and high-resolution direction.Under the promoting of users' tight demand, scialyscope skill in recent years
Art development is swift and violent, and the product such as DLP, LCOS is proposed that performance is high, size is little and lightweight portable scialyscope one after another.
At present, along with the fast development of projection display technique, the volume of Projection Display product constantly reduces, and brightness also requires that
Improve constantly.In Projection Display product, projection display light source is highly important parts.The function of projection lighting optical path is
The wide-angle distribution, the shape that are sent by light beam as much as possible differ, brightness illuminating ray not etc., are converted to be irradiated to display
The uniform light spots of chip effective coverage, it is achieved uniform, bright projection display picture.Projection module preferably to be applied,
Bring the more preferable visual enjoyment of user it is necessary to keeping projecting light path's design to be concisely and efficiently under premise, meet that size is little, light loss
Consuming low and strengthen intensity of illumination and make to have high light output, this also becomes those skilled in the art and needs to be solved the technical problem that
One of.
The information being disclosed in this background section is merely intended to increase the understanding to general background of the present utility model, and
It is not construed as recognizing or imply in any form this information structure existing well known to persons skilled in the art
Technology.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of simple and reasonable, and compact in design is bright
Degree height, the projection lighting optical path that projection quality is good.
For achieving the above object, this utility model provides a kind of projection lighting optical path, it is characterised in that including: be used for
Produce the first light supply apparatus of the first color beam, for producing the secondary light source device of the second color beam and being used for producing green
The green-light source device of fluorescent light beam；Wherein, described first light supply apparatus, comprising: the first color LED light source and be arranged at
The first collimation lens set in LED light source light path of the same colour；Described secondary light source device, comprising: the second color LED light source and setting
It is placed in the second collimation lens set in the second color LED light source light path；Described green-light source device, comprising: be used for sending blueness
The blue laser light source of laser beam and the condenser lens unit set gradually in blue laser light source light path, phosphor plate
And the 3rd collimation lens set；And first dichroic mirror and the second dichroic mirror；
Wherein, through by the first dichroic mirror and the second dichroic mirror after described first color beam collimates via the first collimation lens set
Transmission and/or reflection；Described second color beam via after the second collimation lens set collimation through by the first dichroic mirror and the second color separation
Mirror transmission and/or reflection；Described blue laser beams incides phosphor plate after condenser lens unit optically focused, by blue laser
The green fluorescence light beam sent that excites of light beam collimates via the 3rd collimation lens set, by the first dichroic mirror and the second dichroic mirror
Transmission and/or reflection after, and via the first dichroic mirror and the second dichroic mirror transmission and/or first color beam and second of reflection
Color beam synthesis white light beam.
Described phosphor plate includes: high transparency supports substrate, dichroic film layer and phosphor powder layer；Described blue laser beams
The phosphor powder layer of phosphor plate, excitated fluorescent powder it is transmitted to by dichroic film layer through phosphor plate after condenser lens unit optically focused
Layer sends green fluorescence light beam, and Part I green fluorescence light beam is emitted directly toward the 3rd collimation lens set；Part II green is glimmering
Directive the 3rd collimation lens set again after the dichroic film layer reflection of light light beam directive phosphor plate；At described first dichroic mirror and
Under the effect of two dichroic mirrors, the first color beam, the second color beam and green fluorescence light beam synthesis white light beam.
According to preferred embodiment, described first dichroic mirror and the second dichroic mirror are that chiasma type is arranged；Described first dichroic mirror
Including the second work surface being arranged on the first color beam plane of incidence, and first work surface relative with the second work surface；Institute
State the 4th work surface that the second dichroic mirror includes being arranged on the second color beam plane of incidence, and relative with the 4th work surface
Three work surfaces；Described first color beam after the first collimation lens set collimation through by the second work surface of the first dichroic mirror；
Described second color beam after the second collimation lens set collimation through by the 4th work surface of the second dichroic mirror；Green fluorescence light
Bundle is through the first dichroic mirror and the second dichroic mirror transmission.
According to preferred embodiment, described first dichroic mirror and the second dichroic mirror be arranged in parallel, and described first dichroic mirror includes
It is arranged on the first work surface on the first color beam plane of incidence, and second work surface relative with the first work surface；Described
Two dichroic mirrors include the 3rd work surface being arranged on the second color beam plane of incidence, and fourth work relative with the 3rd work surface
Make face；Described first color beam after the first collimation lens set collimation through by the first dichroic mirror transmission again through the of the second dichroic mirror
Four work surface；Described second color beam through second collimation lens set collimation after through the second dichroic mirror transmission；Green fluorescence light
The Shu Xianhou the second work surface via the first dichroic mirror and the 4th work surface of the second dichroic mirror.
According to preferred embodiment, described projection lighting optical path also includes: for receiving by the first color beam, the second color beam
And the first fly's-eye lens of the white light beam of green fluorescence light beam synthesis, synthesis light beam is carried out even light and it uniformly guided
Subsequent optical parts.
According to preferred embodiment, described projection lighting optical path also includes: be arranged at the first dichroic mirror and the second dichroic mirror it
Between the second fly's-eye lens and be arranged at the 3rd fly's-eye lens of the second collimation lens set light path dead ahead；Described second compound eye
Lens carry out even light to the first color beam and the green fluorescence light beam from the first dichroic mirror it uniformly guide the second dichroic mirror；
Described 3rd fly's-eye lens carries out even light and it uniformly guides the second color separation the second color beam from the second collimation lens set
Mirror；The central optical axis of described second fly's-eye lens is parallel with the central optical axis of the first collimation lens set or overlaps, and the described 3rd is multiple
The central optical axis of eyelens is parallel with the central optical axis of the second collimation lens set or overlaps.
According to preferred embodiment, described phosphor powder layer is covered in described dichroic film layer；Described dichroic film layer transmitted wave
The long light beam less than or equal to 475nm, the reflection wavelength light beam more than 475nm.
According to preferred embodiment, described first color LED light source is blue led light source, and the second color LED light source is red LED
Light source；Or described first color LED light source is red LED light source, and the second color LED light source is blue led light source；Described first point
First work surface of color mirror and the 3rd work surface of the second dichroic mirror are coated with anti-reflection film；Second work surface of described first dichroic mirror
It is coated with reflectance coating with the 4th work surface of the second dichroic mirror.
According to preferred embodiment, described blue laser light source, condenser lens, phosphor plate and the 3rd collimation lens set
Central optical axis the most parallel or overlap.
According to preferred embodiment, the central optical axis of described second collimation lens set and the central optical axis of the 3rd collimation lens set
Parallel；The central optical axis of described first collimation lens set and the central optical axis of the second collimation lens set and the 3rd collimation lens set
Central optical axis is vertical.
According to preferred embodiment, the angle of described first dichroic mirror and the second dichroic mirror is 45 degree；Described first collimation is thoroughly
The central optical axis of mirror group and the central optical axis of the second collimation lens set is parallel or overlaps, all with the center light of the 3rd collimation lens set
Axle is vertical.
Compared with prior art, this utility model has the advantages that described projection lighting optical path, including: by
LED light source of the same colour and the first collimation lens set composition the first light supply apparatus, by the second color LED light source and the second collimation lens set
The secondary light source device formed, the green-light source dress being made up of blue laser light source and the 3rd collimation lens set and phosphor plate
Put, the first dichroic mirror and the second dichroic mirror；Described phosphor plate includes: high transparency supports substrate, dichroic film layer and glimmering
Light bisque, described phosphor powder layer is covered in dichroic film layer.This projection lighting optical path is simple and reasonable, compact in design, uses
Blue laser excitated fluorescent powder layer produces green fluorescence, greatly strengthen green-light source brightness, improves projection quality, solves
A difficult problem for LED light source luminance shortage in projection lighting optical path.
Accompanying drawing explanation
Fig. 1 is the structural representation of projection lighting optical path embodiment one of the present utility model；
Fig. 2 is the structural representation of projection lighting optical path embodiment two of the present utility model；
Fig. 3 is the structural representation of projection lighting optical path embodiment three of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings, detailed description of the invention of the present utility model is described in detail, it is to be understood that this practicality
Novel protection domain is not limited by detailed description of the invention.
Explicitly indicating that unless otherwise other, otherwise in entire disclosure and claims, term " includes " or it becomes
Change and such as " comprising " or " including " etc. will be understood to comprise stated element or ingredient, and do not get rid of other yuan
Part or other ingredient.
Embodiment one:
Fig. 1 is the structural representation of projection lighting optical path embodiment one of the present utility model；As it is shown in figure 1, according to this reality
With the projection lighting optical path of novel detailed description of the invention, including: the first light supply apparatus, secondary light source device, it is used for producing green
The green-light source device of fluorescent light beam a3, and light beam is carried out even light and its uniform the first of subsequent optical parts that guide are answered
Eyelens 112.
Wherein, described first light supply apparatus, comprising: for produce the first color beam a1 the first color LED light source 101 with
And it is arranged at the first collimation lens set 104 in the first color LED light source 101 light path；Described secondary light source device, comprising: use
In the second color LED light source 102 producing the second color beam a2 and the second standard being arranged in the second color LED light source 102 light path
Straight battery of lens 105；Described green-light source device, comprising: for send blue laser beams blue laser light source 103 and
It is arranged at the condenser lens unit 108 in blue laser light source 103 light path, can be excited by blue laser beams 103 and send green
Phosphor plate the 107, the 3rd collimation lens set 106 of fluorescent light beam and arranging in chiasma type for transmission and reflection light
The first dichroic mirror 110 and the second dichroic mirror 111.
Wherein, described phosphor plate 107 includes: high transparency support substrate (figure does not indicates), dichroic film layer 107a and
Phosphor powder layer 107b..
Wherein, described first dichroic mirror 110 includes the second work surface S2 being arranged on the first color beam a1 plane of incidence, with
And the first work surface S1 relative for work surface S2 with second；Described second dichroic mirror 111 includes that being arranged on the second color beam a2 enters
Penetrate the 4th work surface S4 on face, and the threeth work surface S3 relative with the 4th work surface.
Wherein, wherein, described first color beam a1 after the first collimation lens set 104 collimation through by the first dichroic mirror 110
The second work surface S2 be reflected into the first fly's-eye lens 112；Described second color beam a2 collimates through the second collimation lens set 105
It is reflected into the first fly's-eye lens 112 by by the 4th work surface S4 of the second dichroic mirror 111；Described blue laser beams is through poly-
The phosphor powder layer of the dichroic film layer 107a directive phosphor plate 107 of phosphor plate 107 is passed through after optical lens unit 108 optically focused
107b, excitated fluorescent powder layer 107b send green fluorescence light beam；Owing to light-emitting phosphor is isotropism, so Part I is green
Color fluorescent light beam directive dichroic film layer 107a, Part II green fluorescence light beam directive the 3rd collimation lens set 106；First
Divide green fluorescence light beam directive the 3rd collimation lens set 106 after dichroic film layer 107a reflects, green with Part II
Fluorescent light beam is closed light and is formed green fluorescence light beam a3, via the first dichroic mirror 110 and the after the 3rd collimation lens set 106 collimation
Close light formation white light beam after two dichroic mirror 111 transmissions with the first color beam a1 and the second color beam a2 and enter the first fly's-eye lens
112。
In the present embodiment, it is preferred that described phosphor plate 107 is placed on the position of focusing lens unit 108 focus；Institute
Stating focusing lens unit 108 can be single condenser lens or focus lens group.Described blue laser light source 103, focusing are thoroughly
The central optical axis of mirror unit 108, phosphor plate 107 and the 3rd collimation lens set 106 is the most parallel or overlaps.
In the present embodiment, the angle of described first dichroic mirror 110 and the second dichroic mirror 111 is 45 degree；A described group
The central optical axis of 104 and the central optical axis of the second collimation lens set 105 is parallel or overlap, all with the 3rd collimation lens set 106
Central optical axis is vertical.
In the present embodiment, when described first color LED light source 101 is blue led light source, and the second color LED light source 102 is red
Color LED light source；Or described first color LED light source 101 is red LED light source, and the second color LED light source 102 is blue LED light
Source；It is of course also possible to according to actual needs different light sources to be arranged the light of different colours and type.
In order to increase absorbance, the first work surface S1 of described first dichroic mirror 110 and the 3rd work of the second dichroic mirror 111
Make face S3 and can be coated with anti-reflection film；In order to increase reflectance, the second work surface S2 of described first dichroic mirror 110 and the second color separation
4th work surface S4 of mirror 111 can be coated with total reflection film.
In the present embodiment, it is also possible to select to be provided with or without the first collimation lens set, the second collimation as required
Battery of lens and the 3rd collimation lens set；The first color beam that first color LED light source produces, the second color LED light source produce the
Dichroscope bundle, and excited the green fluorescence light beam sent can be without collimation lens set directly via by phosphor plate
White light beam is synthesized after the transmission of one dichroic mirror and the second dichroic mirror and reflection.
In the present embodiment, described phosphor plate can also include that high transparency supports substrate, dichroic film layer and fluorescent material
Layer.Described high transparency supports substrate and is arranged between phosphor powder layer and dichroic film layer, for dichroic film and phosphor powder layer
Carrier, can be substrate of glass or plastic-substrates.
In the present embodiment, described phosphor plate can also select setting as required or be not provided with dichroic film layer, and two
The utilization rate of light beam can be improved to color film layer.
In the present embodiment, described projection lighting optical path can select to arrange as required or to be not provided with the first compound eye saturating
Mirror, arranges the first fly's-eye lens for carrying out incident light beam even light and make it uniformly guide outgoing.
In the present embodiment, described green-light source device can select to arrange as required in blue laser light source light path
Or it is not provided with condenser lens unit.Arrange the light beam that condenser lens unit may be used for sending blue laser light source to gather
Light, improves light utilization.
Embodiment two:
Fig. 2 is the structural representation of projection lighting optical path embodiment two of the present utility model；As in figure 2 it is shown, and embodiment
Unlike one, the projection lighting optical path of embodiment two uses the first dichroic mirror 210 be arrangeding in parallel and the second dichroic mirror 211 right
Tri-color beam carries out closing light；The setting of remaining optics and light path trend are identical with embodiment one.
Described first color beam a1 after the first collimation lens set 204 collimation through by the first dichroic mirror 210 transmission again through the
4th work surface S4 of two dichroic mirrors 211 is reflected into the first fly's-eye lens 212；Described second color beam a2 is through the second collimation thoroughly
It is transmitted into the first fly's-eye lens 212 through the second dichroic mirror after mirror group 205 collimation；Green fluorescence light beam a3 is successively via first point
Second work surface S2 of color mirror 210 and the 4th work surface S4 of the second dichroic mirror 211 is reflected into the first fly's-eye lens 212.
First color beam a1, the second color beam a2, and green fluorescence light beam a3 through transmission and reflection after before the first fly's-eye lens 212
Close light and form white light beam.
Embodiment three:
Fig. 3 is the structural representation of projection lighting optical path embodiment three of the present utility model；As it is shown on figure 3, and embodiment
Unlike two, the projection lighting optical path of embodiment three also includes two fly's-eye lenses: the second fly's-eye lens 312 and the 3rd compound eye
Lens 313, for carrying out even light and it uniformly guiding subsequent optical parts, the setting of remaining optics and light to light beam
Road trend is identical with embodiment two.
Wherein, described second fly's-eye lens 312 is arranged between the first dichroic mirror 310 and the second dichroic mirror 311, and described
Three fly's-eye lenses 313 are arranged at the second collimation lens set 305 light path dead ahead；Described second fly's-eye lens 312 is to through first point
Color mirror 310 transmission and reflection the first color beam a1 and green fluorescence light beam a3 carry out even light and it uniformly guided second point
Color mirror 312；Described 3rd fly's-eye lens 313 carries out even light by it to the second color beam a2 from the second collimation lens set 305
Uniformly guide the second dichroic mirror 311.
In the present embodiment, the central optical axis of described second fly's-eye lens 312 and the center light of the first collimation lens set 304
Axle is parallel or overlaps；The central optical axis of described 3rd fly's-eye lens 313 parallel with the central optical axis of the second collimation lens set 305 or
Overlap.
It should be noted that described phosphor plate is not restricted to the form of this utility model embodiment, described fluorescent material
Layer is covered in described dichroic film layer；Or described high transparency supports substrate and is arranged between phosphor powder layer and dichroic film layer；
The described dichroic film layer transmission peak wavelength light beam less than or equal to 475nm, the reflection wavelength light beam more than 475nm.
The novel projection lighting optical path of this enforcement is simple and reasonable, compact in design, is ensureing that size and weight meet bar
On the premise of part, use blue laser excitated fluorescent powder layer to produce green fluorescence, greatly strengthen green-light source brightness, improve
Projection quality, solves a difficult problem for LED light source luminance shortage in projection lighting optical path.
The aforementioned description to specific illustrative embodiment of the present utility model illustrates that and the purpose of illustration.These
Describe and be not wishing to be defined to this utility model disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
A lot of changes and change.The purpose selected exemplary embodiment and describe is to explain certain principles of the present utility model
And reality application, so that those skilled in the art is capable of and utilizes various different example of the present utility model
Property embodiment and various different selection and change.Scope of the present utility model be intended to by claims and etc. similar shape
Formula is limited.
Claims (10)
1. a projection lighting optical path, it is characterised in that including:
First light supply apparatus, secondary light source device and for producing the green-light source device of green fluorescence light beam；And be used for
Transmission and the first dichroic mirror and the second dichroic mirror that reflect light；
Wherein, described first light supply apparatus includes: for producing the first color LED light source of the first color beam and being arranged at first
The first collimation lens set in color LED light source light path；Described secondary light source device includes: for producing the second of the second color beam
Color LED light source and be arranged at the second collimation lens set in the second color LED light source light path；Described green-light source device includes:
For sending the blue laser light source of blue laser beams, the collecting lens list set gradually in blue laser light source light path
Unit, phosphor plate and the 3rd collimation lens set sending green fluorescence light beam can be excited by blue laser beams；
Wherein, through by the first dichroic mirror and the second dichroic mirror transmission after described first color beam collimates via the first collimation lens set
And/or reflection；Described second color beam is saturating by the first dichroic mirror and the second dichroic mirror via warp after the second collimation lens set collimation
Penetrate and/or reflect；Described blue laser beams incides phosphor plate after condenser lens unit optically focused, by blue laser beams
The green fluorescence light beam sent that excites collimate via the 3rd collimation lens set, saturating by the first dichroic mirror and the second dichroic mirror
After penetrating and/or reflecting, and via the first dichroic mirror and the second dichroic mirror transmission and/or the first color beam of reflection and the second coloured light
Shu Hecheng white light beam.
Projection lighting optical path the most according to claim 1, it is characterised in that described phosphor plate includes: high transparency supports
Substrate, dichroic film layer and phosphor powder layer；Described blue laser beams by after condenser lens unit optically focused through phosphor plate
Dichroic film layer incides the phosphor powder layer of phosphor plate, by a part for the green fluorescence light beam that excitated fluorescent powder layer sends
It is emitted directly toward the 3rd collimation lens set；Another part of green fluorescence light beam incides the dichroic film layer of phosphor plate, through two
It is again incident on the 3rd collimation lens set after color film layer reflects.
Projection lighting optical path the most according to claim 1 and 2, it is characterised in that described first dichroic mirror and the second color separation
Mirror is that chiasma type is arranged；Described first dichroic mirror includes the second work surface being arranged on the first color beam plane of incidence, Yi Jiyu
The first work surface that second work surface is relative；Described second dichroic mirror includes the 4th work being arranged on the second color beam plane of incidence
Make face, and threeth work surface relative with the 4th work surface；Described first color beam is warp after the first collimation lens set collimation
By the second work surface of the first dichroic mirror；Described second color beam after the second collimation lens set collimation through by the second color separation
4th work surface of mirror；Green fluorescence light beam is through the first dichroic mirror and the second dichroic mirror transmission.
Projection lighting optical path the most according to claim 1 and 2, it is characterised in that described first dichroic mirror and the second color separation
Mirror be arranged in parallel, and described first dichroic mirror includes the first work surface being arranged on the first color beam plane of incidence, and with first
The second work surface that work surface is relative；Described second dichroic mirror includes the 3rd work being arranged on the second color beam plane of incidence
Face, and fourth work surface relative with the 3rd work surface；Described first color beam through first collimation lens set collimation after through by
First dichroic mirror transmission is again through the 4th work surface of the second dichroic mirror；Described second color beam is accurate through the second collimation lens set
Through the second dichroic mirror transmission after Zhi；Green fluorescence light beam is successively via the second work surface and second dichroic mirror of the first dichroic mirror
The 4th work surface.
Projection lighting optical path the most according to claim 1, it is characterised in that described projection lighting optical path also includes: be used for
Receive the first fly's-eye lens of the white light beam synthesized by the first color beam, the second color beam and green fluorescence light beam, be used for
Synthesis light beam is carried out even light and it is uniformly guided subsequent optical parts.
Projection lighting optical path the most according to claim 4, it is characterised in that described projection lighting optical path also includes: arrange
The second fly's-eye lens between the first dichroic mirror and the second dichroic mirror and be arranged at the second collimation lens set light path dead ahead
The 3rd fly's-eye lens；The first color beam and green fluorescence light beam from the first dichroic mirror is carried out by described second fly's-eye lens
It is uniformly guided the second dichroic mirror by even light；The second color beam from the second collimation lens set is entered by described 3rd fly's-eye lens
It is uniformly guided the second dichroic mirror by the even light of row；The central optical axis of described second fly's-eye lens and the center of the first collimation lens set
Optical axis is parallel or overlaps, and the central optical axis of described 3rd fly's-eye lens is parallel with the central optical axis of the second collimation lens set or heavy
Close.
Projection lighting optical path the most according to claim 2, it is characterised in that described phosphor powder layer is covered in described dichroic
Film layer；The described dichroic film layer transmission peak wavelength light beam less than or equal to 475nm, the reflection wavelength light beam more than 475nm.
Projection lighting optical path the most according to claim 1, it is characterised in that described blue laser light source, collecting lens list
The central optical axis of unit, phosphor plate and the 3rd collimation lens set is the most parallel or overlaps.
Projection lighting optical path the most according to claim 4, it is characterised in that the central optical axis of described second collimation lens set
Parallel with the central optical axis of the 3rd collimation lens set；The central optical axis of described first collimation lens set and the second collimation lens set
The central optical axis of central optical axis and/or the 3rd collimation lens set is vertical.
Projection lighting optical path the most according to claim 3, it is characterised in that described first dichroic mirror and the second dichroic mirror
Angle be 45 degree；The central optical axis of described first collimation lens set and the central optical axis of the second collimation lens set is parallel or weight
Close, all vertical with the central optical axis of the 3rd collimation lens set.
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| CN201620598003.4U CN205691928U (en) | 2016-06-17 | 2016-06-17 | A kind of projection lighting optical path |
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| CN201620598003.4U CN205691928U (en) | 2016-06-17 | 2016-06-17 | A kind of projection lighting optical path |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748474A (en) * | 2017-10-16 | 2018-03-02 | 广景视睿科技（深圳）有限公司 | A kind of colour mixture luminescent method and projection arrangement for improving projection brightness |
| CN108415212A (en) * | 2018-03-23 | 2018-08-17 | 杭州有人光电技术有限公司 | A kind of projecting illumination system of LED and laser light source composition |
| CN108873582A (en) * | 2018-07-04 | 2018-11-23 | 成都九天光学技术有限公司 | A kind of compact-sized light source of projector |
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