CN206833135U

CN206833135U - A kind of wireless projector for multi-media classroom

Info

Publication number: CN206833135U
Application number: CN201720450110.7U
Authority: CN
Inventors: 徐方
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-26
Filing date: 2017-04-26
Publication date: 2018-01-02
Anticipated expiration: 2027-04-26

Abstract

The utility model discloses a kind of wireless projector for multi-media classroom,Including projecting lens and deflect light converting system,The left end of the projecting lens passes through polarization splitting prism,LCOS light valves are also installed with the left surface of the polarization splitting prism,The lower end of the polarization splitting prism also gluing has collimation lens,X prisms are additionally provided with the lower end of collimation lens,And also it is installed with deflection photoconverter in the lower surface of X prisms,The deflect light converting system is fixedly mounted on the inner surface of projecting lens by the polarizer on the inside of it,By setting LED array,Used as area source,Increase LED arrangement also increases luminous effective area,Add luminous flux,The etendue of light source is reduced using deflect light converting system,The LED area light source of different colours is combined by closing light technology,Form a three-sheet type LCOS optical projection system,Improve light source utilization rate.

Description

A kind of wireless projector for multi-media classroom

Technical field

It the utility model is related to wireless projector technical field, specially a kind of wireless projection for multi-media classroom Device.

Background technology

The light source used in projector system is mostly UHP (ultrahighperformance) lamp, short arc ultra high pressure mercury Lamp, UHP lamps produce cold light, and light efficiency is very big, and very big luminous flux, etendue (etendue) are produced under identical power consumption Efficiency is that the lumen number of per unit etendue is also very high.Because its luminous arc is very short, therefore etendue is smaller, fits Shown for micro projection.But many problems be present using UHP lamps, such as in the projector system of a three-chip type, White light is divided into three kinds of primitive color lights with beam splitting system, it is therefore desirable to three dichronic mirrors.This can improve to a certain extent cost with And the size of increase system.Other UV (Ultraviolet) and IR (Infra-red) colour filter can also increase cost.Due to every Individual optical element can also produce certain loss, therefore reduce final optics output.White light is divided into R, tri- kinds of light of G, B with Afterwards, the spectrum of each color or larger, therefore reduce system gamut.The another drawback of UHP lamps is exactly its longevity Very short, average life span 5000h is ordered, limits the usage time of projecting apparatus.In addition the driving voltage of UHP lamps is too high, cools down lamp Foam product is too big, and price is higher, uses mercury vapour and the danger for having blast etc..This miniaturization and just all to projection system Taking causes certain obstruction.

Utility model content

To achieve the above object, the utility model provides following technical scheme：It is a kind of to be put for the wireless of multi-media classroom Device, including projecting lens and deflect light converting system are reflected, the left end of the projecting lens passes through polarization splitting prism, the polarization LCOS light valves are also installed with the left surface of Amici prism, the lower end also gluing of the polarization splitting prism has collimation saturating Mirror, X prisms are additionally provided with the lower end of collimation lens, and the left and right sides of the X prisms are installed with blue led battle array respectively Row area source and red LED array area source, and deflection photoconverter is also installed with the lower surface of X prisms, it is described inclined The outer surface for turning photoconverter is also equipped with coupling light curtain, and the deflect light converting system passes through the polarizer on the inside of it The inner surface of projecting lens is fixedly mounted on, pupil, the deflect light conversion are also installed with out in the front of projecting lens The left end of system is also installed with adjusting knob, and the lower slide of the adjusting knob is connected with expansion link, the deflect light conversion The lower surface of system is also connected by light beam with transparency, and the transparency is fixedly mounted on the upper surface of Fresnel lens, and Auxiliary condenser is also fixedly mounted in the lower end of Fresnel lens.

As a kind of preferable technical scheme of the utility model, it is described auxiliary condenser lower end be also installed with it is reflective Lens.

As a kind of preferable technical scheme of the utility model, the left end of the reflecting lens is also associated with transformer.

As a kind of preferable technical scheme of the utility model, the upper surface of the deflect light converting system is also fixedly mounted There is LED array.

Compared with prior art, the beneficial effects of the utility model are：This is used for the wireless projector of multi-media classroom, leads to Setting LED array is crossed, is used as area source, the arrangement for increasing LED also increases luminous effective area, adds light and leads to Amount, and according to the etendue formula of light source, the etendue of light source is reduced using deflect light converting system, and make With blue LED arrays area source and red LED array area source and green light source, the LED area light source of different colours is passed through Closing light technology combines, and forms a three-sheet type LCOS optical projection system, modulates back reflection, X by corresponding LCOS light valves respectively Prism combines the light of three kinds of colors, reflects into projecting lens, is distinguished area source and LCOS using condenser is aided in It is placed on the front focal plane and back focal plane of illuminating lens.Because area source is placed in front focal plane, any point is sent on area source The all illuminated collimated of light, these collimated light do not deploy by illuminating lens, but most of enter Projecting lens, they are assembled in the back focal plane of illuminating lens, LCOS are placed on back focal plane, therefore LCOS is effectively illuminated, The illumination efficiency of projector is improved, improves the quality of picture.

Brief description of the drawings

Fig. 1 is the utility model structure diagram；

Fig. 2 is the utility model deflect light conversion system structure schematic diagram.

In figure：1- projecting lens；2- polarization splitting prisms；3-LCOS light valves；4-LCOS light valves；5- goes out pupil；6-X ribs Mirror；7- blue LED arrays area sources；8- red LED array area sources；9- deflects photoconverter；10- couples light curtain；11-LED Array；12- deflect light converting systems；13- adjusting knobs；14- expansion links；15- transparencys；16- Fresnel lenses；17- aids in optically focused Mirror；18- transformers；19- reflecting lens.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Embodiment：

Fig. 1 and Fig. 2 are referred to, the utility model provides a kind of technical scheme：It is a kind of to be put for the wireless of multi-media classroom Device, including projecting lens 1 and deflect light converting system 12 are reflected, the left end of the projecting lens 1 passes through polarization splitting prism 2, institute State and LCOS light valves 3 are also installed with the left surface of polarization splitting prism 2, due to the influence of angle and wavelength, polarized The s light of light converting system reflection is different with the intensity for the p light changed by 1/2 wave plate, and the light finally obtained is simultaneously uneven, therefore Polarization conversion system 12 is combined with coupling light curtain 10, in order to improve the transmissivity of light, the polarization splitting prism 2 Lower end also gluing have collimation lens 4, X prisms 6, the left and right sides of the X prisms 6 are additionally provided with the lower end of collimation lens 4 Face is installed with blue LED arrays area source 7 and red LED array area source 8 respectively, and also solid in the lower surface of X prisms 6 Dingan County is equipped with deflection photoconverter 9, and the outer surface of the deflection photoconverter 9 is also equipped with coupling light curtain 10, using coupling light Curtain 10 returns the fiber absorption that deflection photoconverter 9 deflects, and prevents that light disturbs, the deflect light converting system 12 is logical The polarizer crossed on the inside of it is fixedly mounted on the inner surface of projecting lens 1, uses deflect light converting system 12 to cause defeated Light extraction is single polarization state, improves the efficiency of light energy utilization, and pupil 5, the deflection are also installed with out in the front of projecting lens 1 The left end of light converting system 12 is also installed with adjusting knob 13, and the lower slide of the adjusting knob 13 is connected with expansion link 14, The lower surface of the deflect light converting system 12 is also connected by light beam with transparency 15, and the transparency 15 is fixedly mounted on The upper surface of Fresnel lens 16, and auxiliary condenser 17 is also fixedly mounted in the lower end of Fresnel lens 16.

Preferably, the lower end of the auxiliary condenser 17 is also installed with reflecting lens 19；The reflecting lens 19 Left end be also associated with transformer 18, connect extraneous power supply or solar power current collection plate using transformer 18, improve electric energy Utilization rate, the project effect of the whole projector made are more preferable；The upper surface of the deflect light converting system 12 is also installed with LED array 11.

Specifically used mode and advantage：This is used for the wireless projector of multi-media classroom, by setting LED array, as Area source uses, and the arrangement for increasing LED also increases luminous effective area, adds luminous flux, and according to the light of light source Propagation formula is learned, the etendue of light source is reduced using deflect light converting system, and use blue LED arrays area source With red LED array area source and green light source, the LED area light source of different colours is combined by closing light technology, group Into a three-sheet type LCOS optical projection system, back reflection is modulated by corresponding LCOS light valves respectively, X prisms are by the light knot of three kinds of colors Altogether, projecting lens is reflected into, utilizes the front focal plane for aiding in condenser that area source and LCOS are respectively placed in illuminating lens And on back focal plane.Because area source is placed in front focal plane, all illuminated lens of light that any point is sent on area source are accurate Directly, these collimated light do not deploy by illuminating lens, but major part enters projecting lens, and they are saturating in illumination The back focal plane of mirror is assembled, and LCOS is placed on back focal plane, therefore LCOS is effectively illuminated, and improves the illumination effect of projector Rate, improve the quality of picture.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Claims

A kind of 1. wireless projector for multi-media classroom, it is characterised in that：Including projecting lens (1) and deflect light conversion system Unite (12), the left end of the projecting lens (1) is by polarization splitting prism (2), on the left surface of the polarization splitting prism (2) LCOS light valves (3) are also installed with, the lower end also gluing of the polarization splitting prism (2) has collimation lens (4), saturating in collimation The lower end of mirror (4) is additionally provided with X prisms (6), and the left and right sides of the X prisms (6) are installed with blue LED arrays respectively Area source (7) and red LED array area source (8), and also it is installed with deflection photoconverter in the lower surface of X prisms (6) (9), the outer surface of the deflection photoconverter (9) is also equipped with coupling light curtain (10), and the deflect light converting system (12) is logical The polarizer crossed on the inside of it is fixedly mounted on the inner surface of projecting lens (1), also fixed in the front of projecting lens (1) Pupil (5) is installed out, the left end of the deflect light converting system (12) is also installed with adjusting knob (13), the adjusting knob (13) lower slide is connected with expansion link (14), and the lower surface of the deflect light converting system (12) also passes through light beam and projection Piece (15) is connected, and the transparency (15) is fixedly mounted on the upper surface of Fresnel lens (16), and in Fresnel lens (16) Auxiliary condenser (17) is also fixedly mounted in lower end.
A kind of 2. wireless projector for multi-media classroom according to claim 1, it is characterised in that：The auxiliary is poly- The lower end of light microscopic (17) is also installed with reflecting lens (19).
A kind of 3. wireless projector for multi-media classroom according to claim 2, it is characterised in that：It is described reflective The left end of mirror (19) is also associated with transformer (18).
A kind of 4. wireless projector for multi-media classroom according to claim 1, it is characterised in that：The deflect light The upper surface of converting system (12) is also installed with LED array (11).