CN201402362Y - High light-efficiency minitype projection optical engine - Google Patents
High light-efficiency minitype projection optical engine Download PDFInfo
- Publication number
- CN201402362Y CN201402362Y CN2009201310620U CN200920131062U CN201402362Y CN 201402362 Y CN201402362 Y CN 201402362Y CN 2009201310620 U CN2009201310620 U CN 2009201310620U CN 200920131062 U CN200920131062 U CN 200920131062U CN 201402362 Y CN201402362 Y CN 201402362Y
- Authority
- CN
- China
- Prior art keywords
- light
- source module
- dichroic mirror
- light source
- projection optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 230000010287 polarization Effects 0.000 claims abstract description 51
- 238000007493 shaping process Methods 0.000 claims description 40
- 239000004065 semiconductor Substances 0.000 claims description 39
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000004606 Fillers/Extenders Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 210000000695 crystalline len Anatomy 0.000 description 47
- 241000219739 Lens Species 0.000 description 41
- 238000010586 diagram Methods 0.000 description 10
- 238000002310 reflectometry Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000004456 color vision Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Images
Classifications
-
- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
- G02B27/285—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining comprising arrays of elements, e.g. microprisms
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
- G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
- G02B27/1033—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators having a single light modulator for all colour channels
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
A high light-efficiency minitype projection optical engine comprises a first light source module, a second light source module, a third light source module, a first dichroic mirror, a second dichroicmirror, a polarization converter, a polarization light splitter, a single-piece micro-display panel and a projecting lens, wherein the first dichroic mirror is arranged on the joint of the output light paths of the first light source module and the second light source module used for penetrating first light beam and reflecting a second light beam, the second dichroic mirror is arranged on the output light path of the first dichroic mirror, and is used for reflecting a third light beam, and penetrating the emergent light of the first dichroic mirror. The second and the third light beams respectively shoot into corresponding dichroic mirrors with the incident angles less than 30 degrees, the polarization converter is arranged on the output light path of the second dichroic mirror, and is used for converting received light into polarized light in the single polarization state. The optical engine of the utility model is characterized in that light beams shoot into the dichroic mirrors withthe incident angles less than 30 degrees, and are converted into the polarized light in the single polarization state through the polarization converter, thereby improving the optical efficiency.
Description
Technical field
The utility model relates to projection display technique, relates in particular to a kind of micro projection optical engine of high light efficiency.
Background technology
In recent years, crystal projection technology is widely used in aspects such as electronic teaching, office, commercial affairs and advertisement recreational.And along with the raising day by day of development of science and technology and people's living standard, the crystal projection technology also develops towards microminiaturized, lightweight and high image quality direction.
Publication number " CN201149637 " name is called " minitype projection machine module " and discloses a kind of being easily installed on the portable electric appts to realize the minitype projection machine module of projecting function in China's utility application bulletin instructions.Consult Fig. 1, this minitype projection machine module is mainly by light source assembly 1r, 1g, 1b, dividing-mixing optical system, and micro display chip and projection lens 5 are formed.Micro display chip is the LCOS liquid crystal panel 3,4 that two adjacent orthogonal are provided with.Dividing-mixing optical system comprises 7,8 and flat-plate polarizing devices 2 of two dichroscopes.Ruddiness transmits through first dichroscope 7 and second dichroscope 8, and blue light transmits from second dichroscope 8 after 7 reflections of first dichroscope, and green glow reflects through second dichroscope 8, and the at last synthetic a branch of light of RGB light is injected flat-plate polarizing device 2.Light enters micro display chip through the flat-plate polarizing device, carries image information from projection lens 5 outputs after modulation.Yet, because the polarization effect of film, make natural light that light source assembly sends through behind the dichroscope, the P polarized light does not often reflect or the reflection of part P polarized light is only arranged in the folded light beam, promptly, most of P polarized light will lose, and P polarized light or S polarized light in the optic path process because also further there is light loss in the problem of transmitance or reflectivity, therefore, the light efficiency that projects on the micro display chip is lower, influences the Projection Display quality.
The utility model content
The technical problems to be solved in the utility model provides a kind of simple in structure, efficiency of light energy utilization height, and the Projection Display quality is good, the micro projection optical engine of the high light efficiency that cost is low.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of micro projection optical engine of high light efficiency comprises tricolor semiconductor illuminator, polarizing beam splitter, the little display panel of monolithic and projecting lens.Tricolor semiconductor illuminator comprises the first light source module of outgoing first light beam, the secondary light source module of outgoing second light beam, the 3rd light source module of outgoing the 3rd light beam, be arranged on the intersection of the output light path of described first light source module and secondary light source module, be used to make described first light beam to see through, first dichroic mirror of second beam reflection, be arranged on the output light path of described first dichroic mirror, be used to make the 3rd beam reflection, second dichroic mirror of the light beam transmission of the described first dichroic mirror outgoing, and be arranged on the output light path of described second dichroic mirror, be used for received light is converted to the polarization converter of the polarized light of single polarization state.Described second light beam, the 3rd light beam incide corresponding first dichroic mirror, second dichroic mirror with the incident angle less than 30 ° respectively.Polarizing beam splitter is arranged on the output light path of described tricolor semiconductor illuminator.The little display panel of monolithic is arranged at a non-adjacent side of described polarizing beam splitter and tricolor semiconductor illuminator, be used for received polarized light is modulated, be converted to another polarized light vertical, and make this another polarized light carry image information with this polarized light.Projecting lens is used to receive and throw another polarized light that carries image information.
In the micro projection optical engine of high light efficiency of the present utility model, light beam incides corresponding dichroic mirror with the incident angle less than 30 °, make S polarized light, the P polarized light of the outgoing of light source module all be transferred to polarization converter, the polarized light that transfers single polarization state by polarization converter to, reduce optical energy loss, improve the efficiency of light energy utilization.The light of this tricolor semiconductor illuminator output is behind polarizing beam splitter, offer the little display panel of monolithic, afterwards, the little display panel of monolithic modulates image light and enters projection lens by polarizing beam splitter once more, outputs to external screen from projection lens, and its design of Optical System process only relates to lighting device, a polarizing beam splitter, little display panel of monolithic and projecting lens, do not relate to other optical device, employed optical element is less, and is simple in structure, compact, good uniformity, efficiency of light energy utilization height, the Projection Display quality is good, and, light path is shorter, size is less, and production cost is lower, satisfies the market microminiaturization, light-weighted demand.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the planar structure synoptic diagram of minitype projection machine module in the CN201149637 patent.
Fig. 2 a is the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model first embodiment.
Fig. 2 b is the A portion structure for amplifying synoptic diagram of Fig. 2 a.
Fig. 2 c is the variation synoptic diagram of the reflectivity R of Fig. 2 a with incident angle.
Fig. 3 is the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model second embodiment.
Fig. 4 is the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model the 3rd embodiment.
Embodiment
Fig. 2 a is depicted as the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model first embodiment.Consult Fig. 2 b simultaneously, be the A portion structure for amplifying synoptic diagram of Fig. 2 a.The micro projection optical engine of high light efficiency comprises the first light source module 11, secondary light source module 21, the 3rd light source module 31, first dichroic mirror (Dichroic Mirror), 411, second dichroic mirror 412, polarization converter 51, parallelization lens 811, fly's-eye lens 812, collector lens 813, polarizing beam splitter 61, the little display panel 71 of monolithic and projecting lens (not shown).Wherein, the first light source module 11, secondary light source module 21, the 3rd light source module 31, first dichroic mirror 411, second dichroic mirror 412, parallelization lens 811, fly's-eye lens 812, collector lens 813 and polarization converter 51 constitute tricolor semiconductor illuminator.
The first light source module, 11 outgoing, first light beam.Secondary light source module 21 outgoing second light beam.The 3rd light source module 31 outgoing the 3rd light beam.In the utility model embodiment, the first light source module 11 is the green-light source module, and first light beam is a green beam.Secondary light source module 21 is the blue light source module, and second light beam is the blue light light beam.The 3rd light source module 31 is the red-light source module, and the 3rd light beam is a red light beam.Again, the first light source module 11 comprises first semiconductor light-emitting elements 112, and the first shaping mirror group 113 that is used to collect the first received light beam of also shaping.Secondary light source module 21 comprises second semiconductor light-emitting elements 212, and the second shaping mirror group 213 that is used to collect the second received light beam of also shaping.The 3rd light source module 31 comprises the 3rd semiconductor light-emitting elements 312, and the 3rd shaping mirror group 313 that is used to collect the 3rd received light beam of also shaping.
In the utility model embodiment, first semiconductor light-emitting elements 112, second semiconductor light-emitting elements 212 and the 3rd semiconductor light-emitting elements 312 are light emitting diode (Light EmittingDiode, LED) chip are used to send 180 ° light.And led chip is connected with the controller (not shown), and the sequential that is used for control chip is luminous.Each working frequency of chip is set by the required illumination parameter of little display panel, shows best colour vision effect to reach.Again, the quantity of this led chip can be one, also can be a plurality of for what arrange with array way.Adopt of the arrangement of a plurality of led chips, help improving the lumen quantity of entire lighting device, and then increase the luminance brightness of projected light beam with array way.In addition, the first shaping mirror group 113, the second shaping mirror group 213 and the 3rd shaping mirror group 313 include three tactic positive lenss.In the utility model embodiment, be positive lens and lenticular positive lens of two falcates, its material is a glass, and series arrangement is between semiconductor light-emitting elements 112,212,312 and dichroic mirror 411,412.The quantity of positive lens can design according to the size of dichroic mirror 411,412 in the first shaping mirror group 113, the second shaping mirror group 213 and the 3rd shaping mirror group 313.As a rule, the size of dichroic mirror 411,412 is more little, the angle of divergence of the incident beam that it is required is also more little, and the light beam that sends from led chip just needs progressively to reduce to incide through the convergence of more positive lens the angle of divergence of dichroic mirror 411,412, to improve the utilization factor of luminous energy.
In other embodiment of the utility model, also can adopt plano-convex lens to form shaping lens group, and the quantity of positive lens can be one, also can repeat no more for more than two or three here.
First dichroic mirror 411 is arranged on the intersection of the output light path of the first light source module 11 and secondary light source module 21, is used to make first light beam, and promptly green beam sees through, and makes second light beam, i.e. the blue light beam reflection.Second dichroic mirror 412 is arranged on the output light path of first dichroic mirror 411, is used to make the 3rd light beam, and promptly red light beam reflects, and makes the light beam of first dichroic mirror, 411 outgoing, that is, and and green beam, the transmission of blue light light beam.In the utility model embodiment, first dichroic mirror 411, the 412 angled settings of second dichroic mirror, and secondary light source module 21 and the 3rd light source module 31 are arranged on the both sides of tricolor semiconductor illuminator optical axis.In the utility model, second light beam, the 3rd light beam incide corresponding first dichroic mirror 411, second dichroic mirror 412 with the incident angle less than 30 ° respectively, in order to improve light efficiency.
When the natural light of the first light source module 11, secondary light source module 21,31 outgoing of the 3rd light source module impinges perpendicularly on the film of dichroic mirror 411,412, the polarized light of all directions all is the same with respect to film, thereby have identical reflectivity or a refractive index, promptly, reflected light and transmitted light still are natural lights, and the influence of polarization of incident light state is less.But when the natural light oblique incidence of these module outgoing, reflected light and transmitted light all are partial poolarized lights.Consult Fig. 2 c, when θ=0 °, R
P=R
S, promptly the reflectivity of P polarized light equals the reflectivity of S polarized light.Along with the increase of incident angle θ, the reflectivity R of S polarized light
SIncrease gradually, and the reflectivity R of P polarized light
PBe to drop to zero earlier, rise rapidly again then that reflected light is a partial poolarized light.If the reflectivity R of P polarized light
PBe zero, when promptly incident angle θ was Brewster angle, reflected light had only the S polarized light, and does not have the P polarized light.In the utility model, select incident angle θ less than 30 ° of incidents, reflected light has P polarized light, S polarized light, and the phase differential of P polarized light and S polarized light is less.At this moment, the loss of luminous energy is less, all is transferred to polarization converter 51 by most light of light source module outgoing, improves light efficiency.When incident angle θ is 25 ° of incidents, be that blue light light beam, red light beam are when inciding the first corresponding dichroic mirror 411, second dichroic mirror 412 with 25 ° incident angle roughly respectively, the reflectivity of the reflectivity of P polarized light and S polarized light about equally in the reflected light, make optical energy loss littler, light efficiency is higher.
In the utility model embodiment, the incident angle of the incident angle of second light beam and the 3rd light beam is roughly the same, promptly, it is roughly the same with the angle that red light beam incides the second corresponding dichroic mirror 412 that the blue light light beam incides the angle of the first corresponding dichroic mirror 411, adopt the mode incident of roughly the same incident angle, help assembly crewman's installation, improve efficiency of assembling.
In other embodiment of the utility model, the incident angle of second light beam also can be different with the incident angle of the 3rd light beam, that is, the blue light light beam angle that incides the first corresponding dichroic mirror 411 and red light beam incide the angle of the second corresponding dichroic mirror 412 also can be different.For example, the incident angle of blue light light beam is 25 °, and the incident angle of red light beam is 30 °, repeats no more here.
It is parallel beam that parallelization lens 811 are used for received Beam Transformation, and, the bore of parallelization lens 811 is slightly larger than the bore of the first light source module 11, in the embodiment, be slightly larger than the bore of the first shaping mirror group 113, adopt the bigger parallelization lens of bore, help the collection of luminous energy.Fly's-eye lens 812 is used to receive parallel beam and parallel beam is done homogenising handle.Collector lens 813 is used for the light beam after the homogenising processing is assembled.Polarization converter 51 is arranged between fly's-eye lens 812 and the collector lens 813, is used for received light is converted to the polarized light of single polarization state, that is, polarization converter 51 can all be converted to S polarized light or P polarized light to the light of incident, improves light efficiency.Therefore, after 180 ° the light process shaping mirror group and dichroic mirror 411,412 that led chip sent, after synthetic a branch of light beam that contains S polarized light and P polarized light was simultaneously injected polarization converter 51, the output angle of divergence was less than or equal to the light of-15 °～+ 15 ° single polarization state.
In other embodiment of the utility model,, also can omit parallelization lens 811, fly's-eye lens 812 and collector lens 813 if less demanding to the homogenising of light beam.That is, polarization converter 51 is set directly on the output light path of second dichroic mirror 412, is used for received light is converted to the polarized light of single polarization state.
The quantity of polarization converter 51 is one, and the structure of this polarization converter 51 can be polaroid, also can be made up of several prisms that combines continuously.Consult Fig. 2 b, the polarization converter 51 of present embodiment is made up of a plurality of right-angle triangles and parallelogram prism, and light shielding part 511 is set on the plane of incidence of part prism.Be coated with polarization beam splitter 513 or total reflection film 514 on the faying face of prism.Polarization beam splitter 513 and total reflection mould 514 alternate configurations.Surface at that prism of outgoing S polarized light is provided with 1/2nd wave plates 512, is used for the S polarized light is converted to the P polarized light.Say in detail, light beam is injected the polarization beam splitter 513 of prism, the direct transmission of P polarized light, and after the S polarized light is reflected to total reflection film 514, reflex to 1/2nd wave plates 512 once more by total reflection film 514, the S polarized light is converted to the P polarized light by 1/2nd wave plates 512.Therefore, polarization converter 51 all is converted to the light of single polarization state with the light of incident, and present embodiment is the outgoing of P polarized light.In the utility model, because most light (comprising S polarized light, P polarized light) of light source module outgoing all are transferred to polarization converter 51, therefore, behind polarization converter 51, the light that most light of light source module outgoing are converted to single polarization state again transmits, light energy losses is very little, improves the efficiency of light energy utilization greatly.
In other embodiment of the utility model, also can only plate polarization beam splitter on the faying face of prism.And the structure of polarization converter also is not limited to this, for example, can also be combined by several parallelogram prisms that combine continuously and isosceles triangle prism, wherein, several parallelogram prisms are that the center is symmetrically distributed with an isosceles triangle prism.With plate polarization beam splitter on the faying face that the isosceles triangle prism combines, and plating polarization beam splitter or total reflection film on other faying face, and, the polarization beam splitter of other faying face and total reflection mould alternate configurations.Simultaneously, the light-emitting face of part prism is provided with 1/2nd wave plates.In addition, by the position of conversion 1/2nd wave plates, can also all be converted to the S polarized light to incident light.
Polarizing beam splitter 61 is arranged on the output light path of tricolor semiconductor illuminator, in the utility model embodiment, polarizing beam splitter 61 is the lens type polarizing beam splitter, compose cube shaped by two triangular prisms, be coated with the polarization spectro rete therebetween on the surface of contact, form a polarization light-dividing surface by this polarization spectro rete, this polarization light-dividing surface can be converted to nonpolarized light polarized light and isolate the S polarized light and the P polarized light.Certainly, polarizing beam splitter 61 also can compose other shape by other prism, is converted into the polarized light outgoing as long as satisfy the nonpolarized light of incident.
In other embodiment of the utility model, this polarizing beam splitter 61 also can replace (consulting Fig. 4) by flat polarizing beam splitter.
The little display panel 71 of monolithic is arranged at a non-adjacent side of polarizing beam splitter 61 and tricolor semiconductor illuminator, be used for received polarized light is modulated, be converted to another polarized light vertical, and make this another polarized light carry image information with this polarized light.In the present embodiment, the little display panel 71 of monolithic is a silica-based liquid crystal panel.When the little display panel 71 received polarized lights of monolithic are the P polarized light, after the modulation through the little display panel 71 of monolithic, be converted to the S polarized light that carries image information, and, this S polarized light reflexed on the projecting lens by polarizing beam splitter 61 with on its reflected back polarizing beam splitter 61.In other words, the little display panel 71 adjacent sides that are arranged at polarizing beam splitter 61 of projecting lens and monolithic, that is, the little display panel 71 of projecting lens and monolithic is arranged at respectively on the adjacent two sides of polarizing beam splitter 61.At this moment, projecting lens is to be used to receive and throw the S polarized light that carries image information.
In other embodiment of the utility model, when the polarized light that the little display panel 71 of this monolithic receives also can be for the S polarized light, after the modulation through the little display panel 71 of monolithic, the P polarized light that carries image information will be converted to, and on its reflected back polarizing beam splitter 61, by polarizing beam splitter 61 with this P polarized light transmission to projecting lens.In other words, little display panel 71 opposing parallel of projecting lens and monolithic are arranged at a side of polarizing beam splitter 61, are used to receive and throw another polarized light that carries image information, i.e. P polarized light.
Figure 3 shows that the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model second embodiment.The structure of the micro projection optical engine of the high light efficiency of the micro projection optical engine of this high light efficiency and first embodiment is basic identical, difference is that first dichroic mirror 421, second dichroic mirror 422 shown in Figure 3 be arranged in parallel, and secondary light source module 22 and the 3rd light source module 32 are arranged on the same side of tricolor semiconductor illuminator optical axis.
Figure 4 shows that the planar structure synoptic diagram of micro projection optical engine of the high light efficiency of the utility model the 3rd embodiment.The structure of the micro projection optical engine of the high light efficiency of the micro projection optical engine of this high light efficiency and first embodiment is basic identical, difference is that tricolor semiconductor illuminator shown in Figure 4 also comprises the 3rd dichroic mirror 433, be used to reflect first light beam, i.e. green beam.First light beam in the present embodiment incides the 3rd dichroic mirror 433 with the incident angle less than 30 ° equally.Again, the incident angle of the incident angle of the incident angle of first light beam and second light beam, the 3rd light beam is roughly the same.That is, angle, the red light beam that the angle of the 3rd dichroic mirror 433 that blue beam incides and blue light light beam incide the first corresponding dichroic mirror 431 incides the angle of the second corresponding dichroic mirror 432, and be all roughly the same.
In other embodiment of the utility model, the incident angle of each light beam also can be different.
Again, the first shaping mirror group 133, the second shaping mirror group 233 and the 3rd shaping mirror group 333 include reflective compound parabolic concentrator (Compound Parabolic Concentrator, CPC), its material is plastics, and outer cross sectional shape is oval or circular.The light outgoing zone of the central portion of compound parabolic concentrator is convex curved surface, and the perimeter sides reflector space is curved surface, and the central optical incident area then is the concavity curved surface.Therefore, the wide-angle incident light that semiconductor light-emitting elements sends becomes substantially parallel light beam outgoing after the experiences total internal reflection of lateral reflection zone around, and the low-angle incident light that it sends is then assembled through the central portion refraction.
In other embodiment of the utility model, the structure of compound parabolic concentrator is not limited to the structure in the utility model embodiment, and for example: its central incident light district territory also can be the plane.In addition, the first shaping mirror group 133, the second shaping mirror group 233 and the 3rd shaping mirror group 333 all can also comprise at least one lens again, promptly between each compound parabolic concentrator and dichroic mirror, all at least one lens can be set again, further light beam carried out shaping and to reduce the angle of divergence of emergent light.
In addition, the polarizing beam splitter in the utility model embodiment 63 is flat polarizing beam splitter.This flat polarizing beam splitter is the tabular transparent base (as glass, plastic cement etc.) that a surface has the polarization spectro rete, perhaps be made by the tabular crystal that produces the polarization spectro effect through PROCESS FOR TREATMENT, the polarizing beam splitter of this structure has the light-receiving angular width, the little advantage such as in light weight of volume helps the microminiaturization of light engine.
In other embodiment of the utility model, polarizing beam splitter 63 also can repeat no more here for lens type polarizing beam splitter (consulting Fig. 2 a, Fig. 3).
Therefore, in the micro projection optical engine of high light efficiency of the present utility model, light beam incides corresponding dichroic mirror with the incident angle less than 30 °, make most light of light source module outgoing all be transferred to polarization converter, the polarized light that transfers single polarization state by polarization converter to, reduce optical energy loss, improve the efficiency of light energy utilization; Secondly, by fly's-eye lens is set, improve the homogeneity of light beam; The light of this tricolor semiconductor illuminator output is behind polarizing beam splitter, offer the little display panel of monolithic, afterwards, the little display panel of monolithic modulates image light and enters projection lens by polarizing beam splitter once more, outputs to external screen from projection lens, and its design of Optical System process only relates to lighting device, a polarizing beam splitter, little display panel of monolithic and projecting lens, do not relate to other optical device, employed optical element is less, and is simple in structure, compact, good uniformity, efficiency of light energy utilization height, the Projection Display quality is good, and, light path is shorter, size is less, and production cost is lower, satisfies the market microminiaturization, light-weighted demand.
The embodiment of the above is a better embodiment of the present utility model, be not to limit concrete practical range of the present utility model with this, scope of the present utility model comprises and is not limited to this embodiment, for example, first semiconductor light-emitting elements, second semiconductor light-emitting elements and the 3rd semiconductor light-emitting elements are one or a plurality of laser chips of arranging with array way, and the first shaping mirror group, the second shaping mirror group and the 3rd shaping mirror group include extender lens, and the laser beam enlarging bundle that is used for that laser chip is sent is shaped as and is fit to the required size of dichroic mirror.The little display panel of monolithic is a transmissive liquid crystal panel.The equivalence variation that all shapes according to the utility model, structure are done all comprises in the protection domain of the present utility model.
Claims (17)
1. the micro projection optical engine of a high light efficiency comprises:
Tricolor semiconductor illuminator comprises:
The first light source module, its outgoing first light beam;
The secondary light source module, its outgoing second light beam;
The 3rd light source module, its outgoing the 3rd light beam;
First dichroic mirror is arranged on the intersection of the output light path of described first light source module and secondary light source module, is used to make described first light beam to see through second beam reflection;
Second dichroic mirror is arranged on the output light path of described first dichroic mirror, is used to make described the 3rd beam reflection, the light beam transmission of the first dichroic mirror outgoing;
It is characterized in that described second light beam, the 3rd light beam incide corresponding first dichroic mirror, second dichroic mirror with the incident angle less than 30 ° respectively;
Polarization converter is arranged on the output light path of described second dichroic mirror, is used for received light is converted to the polarized light of single polarization state;
Polarizing beam splitter is arranged on the output light path of described tricolor semiconductor illuminator;
The little display panel of monolithic, be arranged at a non-adjacent side of described polarizing beam splitter and tricolor semiconductor illuminator, be used for received polarized light is modulated, be converted to another polarized light vertical, and make this another polarized light carry image information with this polarized light; And;
Projecting lens is used to receive and throw another polarized light that carries image information.
2. the micro projection optical engine of high light efficiency according to claim 1 is characterized in that, described first dichroic mirror, second dichroic mirror be arranged in parallel; Described secondary light source module and the 3rd light source module are arranged on the same side of tricolor semiconductor illuminator optical axis.
3. the micro projection optical engine of high light efficiency according to claim 1 is characterized in that, described first dichroic mirror, the angled setting of second dichroic mirror; Described secondary light source module and the 3rd light source module are arranged on the both sides of tricolor semiconductor illuminator optical axis.
4. the micro projection optical engine of high light efficiency according to claim 1 is characterized in that, the incident angle of the incident angle of described second light beam and described the 3rd light beam is roughly the same.
5. the micro projection optical engine of high light efficiency according to claim 4 is characterized in that, the incident angle of described second light beam, the 3rd light beam is roughly 25 °.
6. according to the micro projection optical engine of any described high light efficiency of claim 1 to 5, it is characterized in that, described tricolor semiconductor illuminator also comprises the 3rd dichroic mirror, is used to reflect first light beam, and described first light beam incides the 3rd dichroic mirror with the incident angle less than 30 °.
7. the micro projection optical engine of high light efficiency according to claim 6 is characterized in that, the incident angle of the incident angle of described first light beam and described second light beam, the incident angle of the 3rd light beam are roughly the same.
8. according to the micro projection optical engine of any described high light efficiency of claim 1 to 5, it is characterized in that, described tricolor semiconductor illuminator comprises that also being used for received Beam Transformation is the parallelization lens of parallel beam, be used to receive parallel beam and parallel beam is made the fly's-eye lens that homogenising is handled, and the collector lens assembled of the light beam after homogenising handled.
9. the micro projection optical engine of high light efficiency according to claim 8 is characterized in that, the bore of described parallelization lens is slightly larger than the bore of the first light source module.
10. the micro projection optical engine of high light efficiency according to claim 8 is characterized in that, described polarization converter is arranged between described fly's-eye lens and the collector lens.
11. the micro projection optical engine according to any described high light efficiency of claim 1 to 5 is characterized in that, the described first light source module is the green-light source module, and first light beam is a green beam; Described secondary light source module is the blue light source module, and second light beam is the blue light light beam; Described the 3rd light source module is the red-light source module, and the 3rd light beam is a red light beam.
12. the micro projection optical engine according to any described high light efficiency of claim 1 to 5 is characterized in that, the first shaping mirror group that the described first light source module comprises first semiconductor light-emitting elements and is used to collect the first received light beam of also shaping; The second shaping mirror group that described secondary light source module comprises second semiconductor light-emitting elements and is used to collect the second received light beam of also shaping; The 3rd shaping mirror group that described the 3rd light source module comprises the 3rd semiconductor light-emitting elements and is used to collect the 3rd received light beam of also shaping.
13. the micro projection optical engine of high light efficiency according to claim 12, it is characterized in that described first semiconductor light-emitting elements, second semiconductor light-emitting elements and the 3rd semiconductor light-emitting elements are one or a plurality of light-emitting diode chip for backlight unit of arranging with array way.
14. the micro projection optical engine of high light efficiency according to claim 13 is characterized in that, the described first shaping mirror group, the second shaping mirror group and the 3rd shaping mirror group include at least one tactic lens.
15. the micro projection optical engine of high light efficiency according to claim 13 is characterized in that, the described first shaping mirror group, the second shaping mirror group and the 3rd shaping mirror group include reflective compound parabolic concentrator.
16. the micro projection optical engine of high light efficiency according to claim 12, it is characterized in that described first semiconductor light-emitting elements, second semiconductor light-emitting elements and the 3rd semiconductor light-emitting elements are one or a plurality of laser chips of arranging with array way; The described first shaping mirror group, the second shaping mirror group and the 3rd shaping mirror group include extender lens, and the laser beam enlarging bundle that is used for that described laser chip is sent is shaped as and is fit to described first dichroic mirror, the required size of second dichroic mirror.
17. the micro projection optical engine according to any described high light efficiency of claim 1 to 5 is characterized in that, described polarizing beam splitter is lens type polarizing beam splitter or flat polarizing beam splitter; The little display panel of described monolithic is silica-based liquid crystal panel or transmissive liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201310620U CN201402362Y (en) | 2009-04-24 | 2009-04-24 | High light-efficiency minitype projection optical engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201310620U CN201402362Y (en) | 2009-04-24 | 2009-04-24 | High light-efficiency minitype projection optical engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201402362Y true CN201402362Y (en) | 2010-02-10 |
Family
ID=41662160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201310620U Expired - Lifetime CN201402362Y (en) | 2009-04-24 | 2009-04-24 | High light-efficiency minitype projection optical engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201402362Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943845A (en) * | 2009-07-07 | 2011-01-12 | 红蝶科技(深圳)有限公司 | Efficient miniature projection optical engine |
| CN102455582A (en) * | 2010-10-30 | 2012-05-16 | 东莞市松毅电子有限公司 | Projector with a light source |
| CN102466957A (en) * | 2010-11-12 | 2012-05-23 | 广景科技有限公司 | Compact DLP miniature projector module |
| CN102540482A (en) * | 2010-12-13 | 2012-07-04 | 红蝶科技(深圳)有限公司 | Projecting system with double extinction ratios |
| CN102789055A (en) * | 2011-05-20 | 2012-11-21 | 日立视听媒体股份有限公司 | Scanning type projector |
| CN106151999A (en) * | 2015-01-30 | 2016-11-23 | 欧帝尔光学镀膜有限公司 | Use LED or the projection system of fluorescent material converted light source |
| CN102540482B (en) * | 2010-12-13 | 2016-12-14 | 红蝶科技(深圳)有限公司 | A kind of projecting system with double extinction ratios |
| CN107085348A (en) * | 2017-06-27 | 2017-08-22 | 深圳市点睛创视技术有限公司 | A kind of Portable projector and its colimated light system |
| CN113359294A (en) * | 2020-03-06 | 2021-09-07 | 苏州苏大维格科技集团股份有限公司 | Micro optical system |
| CN115639683A (en) * | 2022-11-07 | 2023-01-24 | 黄心铭 | Light polarization conversion lens group and projection light engine optical system with same |
| CN117452758A (en) * | 2023-12-23 | 2024-01-26 | 深圳市瀚思通汽车电子有限公司 | An LCoS chip projection machine and projector |
| WO2025154556A1 (en) * | 2024-01-18 | 2025-07-24 | 株式会社小糸製作所 | Image projection device |
-
2009
- 2009-04-24 CN CN2009201310620U patent/CN201402362Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943845A (en) * | 2009-07-07 | 2011-01-12 | 红蝶科技(深圳)有限公司 | Efficient miniature projection optical engine |
| CN102455582A (en) * | 2010-10-30 | 2012-05-16 | 东莞市松毅电子有限公司 | Projector with a light source |
| CN102466957A (en) * | 2010-11-12 | 2012-05-23 | 广景科技有限公司 | Compact DLP miniature projector module |
| CN102540482B (en) * | 2010-12-13 | 2016-12-14 | 红蝶科技(深圳)有限公司 | A kind of projecting system with double extinction ratios |
| CN102540482A (en) * | 2010-12-13 | 2012-07-04 | 红蝶科技(深圳)有限公司 | Projecting system with double extinction ratios |
| CN102789055A (en) * | 2011-05-20 | 2012-11-21 | 日立视听媒体股份有限公司 | Scanning type projector |
| CN102789055B (en) * | 2011-05-20 | 2015-08-05 | 日立乐金光科技株式会社 | Sweep type projection arrangement |
| CN106151999A (en) * | 2015-01-30 | 2016-11-23 | 欧帝尔光学镀膜有限公司 | Use LED or the projection system of fluorescent material converted light source |
| CN107085348A (en) * | 2017-06-27 | 2017-08-22 | 深圳市点睛创视技术有限公司 | A kind of Portable projector and its colimated light system |
| CN113359294A (en) * | 2020-03-06 | 2021-09-07 | 苏州苏大维格科技集团股份有限公司 | Micro optical system |
| CN115639683A (en) * | 2022-11-07 | 2023-01-24 | 黄心铭 | Light polarization conversion lens group and projection light engine optical system with same |
| CN117452758A (en) * | 2023-12-23 | 2024-01-26 | 深圳市瀚思通汽车电子有限公司 | An LCoS chip projection machine and projector |
| WO2025154556A1 (en) * | 2024-01-18 | 2025-07-24 | 株式会社小糸製作所 | Image projection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201402362Y (en) | High light-efficiency minitype projection optical engine | |
| CN201464788U (en) | High-efficiency micro projection optical engine | |
| CN201780448U (en) | Projection optics engine with even and clear image | |
| CN101943845A (en) | Efficient miniature projection optical engine | |
| CN101813290A (en) | Tricolor semiconductor illuminator and minitype projection optical engine use same | |
| CN101750861A (en) | Micro-projection optical engine | |
| CN101923272A (en) | Miniature projection optical engine based on three-color light source | |
| CN201886268U (en) | Laser light supply apparatus used for projection display | |
| CN201417358Y (en) | Miniature projection optical engine with high lighting effect | |
| CN102330888A (en) | Light mixing type monochromatic light source with function of fluorescent powder excitation and projection optical engine using same | |
| CN201237156Y (en) | LED light source and liquid crystal projection equipment employing the same | |
| CN101995743A (en) | Optical projection engine with uniform brightness and color | |
| WO2022028284A1 (en) | Relay color combining device, miniature projection light engine and method thereof, and electronic device | |
| CN101930155B (en) | Projection optical engine | |
| CN201518089U (en) | Minitype projection optical engine based on trichromatic light source | |
| CN101639195A (en) | Light-emitting diode light source device and liquid crystal projecting device using same | |
| CN2685930Y (en) | Silicon-base microcrystal single chip type optical engine structure | |
| CN101762960B (en) | Projector | |
| CN106918921A (en) | A kind of laser display based on fly's-eye lens is polarized shimming apparatus for shaping | |
| CN201804203U (en) | Projection display system | |
| CN111435215A (en) | Compact miniature projection light engine | |
| CN101101432B (en) | Optical module | |
| CN210666222U (en) | Color combination device | |
| CN212694237U (en) | Light angle control module and single-chip LCD projector | |
| CN101749566A (en) | Semiconductor lighting device and micro projection optical engine using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Patentee after: Butterfly Technology (Shenzhen) Limited Address before: 518057, 301, two, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Patentee before: Butterfly Technology (Shenzhen) Limited |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100210 |