CN101923272A - Miniature projection optical engine based on three-color light source - Google Patents
Miniature projection optical engine based on three-color light source Download PDFInfo
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- CN101923272A CN101923272A CN2009101079448A CN200910107944A CN101923272A CN 101923272 A CN101923272 A CN 101923272A CN 2009101079448 A CN2009101079448 A CN 2009101079448A CN 200910107944 A CN200910107944 A CN 200910107944A CN 101923272 A CN101923272 A CN 101923272A
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Abstract
The invention relates to a miniature projection optical engine based on a three-color light source, which comprises a light source module, a polarization converter, a fly's-eye lens group, a light condensing and shaping lens group, a polarization beam splitter, a monolithic micro display panel and a projection lens, wherein the light source module emits three-color non-polarized light; the polarization converter is arranged on the emergent light path of the light source module and converts one three-color non-polarized light beam into two polarized light beams travelling in the same direction under the same polarization state; the polarization state is arranged on one side of the polarization converter and is used for homogenizing the received polarized light; the monolithic micro display panel is arranged on one side of the polarization beam splitter, which is not adjacent to the light condensing and shaping lens group and is used for modulating the polarized light with image information; and the projection lens is used for projecting the polarized light with image information. The optical engine omits a light merging element, and the number of the used optical elements is small; the invention has short light path, compact structure, small size, high light energy utilization efficiency and good uniformity.
Description
Technical field
The present invention relates to projection display technique, relate in particular to a kind of micro projection optical engine based on three-color light source.
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 in the Chinese invention patent ublic specification of application " CN1721978 " name is called " lighting device and projection display device " and discloses a kind of projection display device, it comprises three lighting devices, three display panels, dichronic mirror and projecting lens.Wherein, each lighting device includes light source, optical waveguide, collector lens, first fly lens, second fly lens and convex lens.The light of each lighting device outgoing all through the display panels of correspondence, is modulated into image light, and image light of all kinds is again by dichronic mirror combined color image light, by the projecting lens enlarging projection and be presented on the screen.Yet the projection arrangement of this structure, each light source need all independently that optical waveguide, collector lens, first fly lens, second fly lens and convex lens carry out shaping to light, employed optical element is more, simultaneously, needs three panels, and in conjunction with closing optical element (dichronic mirror), realize Projection Display, efficient is lower, and, complex structure, light path is longer, and size is bigger, can't satisfy market microminiaturization, light-weighted demand.
Summary of the invention
In view of this, must provide a kind of compact conformation, light path is shorter, and size is less, the micro projection optical engine of good uniformity, with the microminiaturization of satisfying market, light-weighted demand.
A kind of micro projection optical engine based on three-color light source comprises: light source module, polarization converter, compound eye lens group, optically focused shaping lens group, polarizing beam splitter, the little display panel of monolithic, and projecting lens.Wherein, light source module outgoing three look nonpolarized lights.Polarization converter is arranged on the emitting light path of described light source module, a branch of three look nonpolarized lights of light source module outgoing be converted to two bundles with equidirectional advance, the polarized light of same polarization state.Compound eye lens group is arranged at a side of described polarization converter, is used for that received polarized light is carried out homogenising and handles.The optically focused shaping lens group is arranged on the emitting light path of described compound eye lens group.Polarizing beam splitter is arranged on the emitting light path of described optically focused shaping lens group.The little display panel of monolithic is arranged at a non-adjacent side of described polarizing beam splitter and optically focused shaping lens group, is used to modulate the polarized light that carries image information.Projecting lens is used to throw the described polarized light that carries image information.
In the micro projection optical engine of the present invention, polarization converter a branch of three look nonpolarized lights of light source module institute outgoing be converted to two bundles with equidirectional advance, the polarized light of same polarization state, improve the efficiency of light energy utilization; Secondly, by being set, compound eye lens group improves homogeneity; In addition, three coloured light of light source module outgoing directly pass through polarization converter, compound eye lens group, the output of optically focused shaping lens group, behind polarizing beam splitter, offer the little display panel of monolithic, afterwards, the little display panel of monolithic modulates image light and enters projecting lens by polarizing beam splitter once more, outputs to external screen from projecting lens, and the optical element of use is less, though the whole optical system design is based on three-color light source, close optical element but omitted, simple in structure, compactness, good uniformity, and, light path is shorter, and size is less, satisfies the market microminiaturization, light-weighted demand.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of first embodiment of the invention;
Fig. 2 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of second embodiment of the invention;
Fig. 3 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of third embodiment of the invention;
Fig. 4 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of four embodiment of the invention;
Fig. 5 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of fifth embodiment of the invention;
Fig. 6 is the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of sixth embodiment of the invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Figure 1 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of first embodiment of the invention, it comprises the light source module, polarization converter 13, compound eye (fly ' s eye) lens combination 14, optically focused shaping lens group 15, polarizing beam splitter 16, little display panel 17 of monolithic and projecting lens (not shown).Wherein, the light source module is used for outgoing three look nonpolarized lights, and it comprises a plurality of light-emitting components 11 and shaping mirror group 12.
A plurality of light-emitting components 11 comprise at least one red light-emitting element of outgoing ruddiness, at least one blue light emitting element of outgoing blue light and at least one green luminescence element of outgoing green glow.In the embodiment of the present invention, red light-emitting element, blue light emitting element and green luminescence element are installed on the same substrate (not indicating among the figure), and (Light Emitting Diode, LED) chip are used to send 180 ° light to be light emitting diode.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 four: two green light LED chips, a red LED chip and a blue-light LED chip, also can for arrange with array way more than four.Adopt of the arrangement of a plurality of led chips, help improving the luminous flux of whole light source module, and then increase the luminance brightness of projected light beam with array way.
In other embodiment of the present invention, also can adopt plano-convex lens or biconvex lens to form shaping lens group, and the quantity of positive lens can be one, also can be for more than two, as a rule, the size of the end face at polarization converter 13 reception incident light places is more little, and the angle of divergence of the incident beam that it is required is also more little, the light beam that sends from led chip just needs progressively to reduce to incide through the convergence of more lens the angle of divergence of polarization converter 13, to improve the utilization factor of luminous energy.
Consult Fig. 1, in the embodiment of the present invention, polarization converter 13 comprises 3 prisms 1311,1312,1333, linear array, is glued at one.Specifically, be 2 right-angle triangle prisms 1311,1312 and be clipped in an isosceles triangle prism 1313 in the middle of it.Wherein, all be coated with the polarization spectro rete on the faying face between isosceles triangle prism 1313 and the right-angle triangle prism 1311,1312.Reverberator 133 is a catoptron, is arranged at 1/2nd exit facet places of isosceles triangle prism 1313.Quarter-wave plate 132 is glued on another 1/2nd end face of isosceles triangle prism 1313.Principle of work is: the nonpolarized light of light source module outgoing is incident to polarization converter 13.When nonpolarized light entered the faying face of isosceles triangle prism 1313 and right-angle triangle prism 1312, because the effect of polarization spectro rete, nonpolarized light was separated into first polarized light and second polarized light, i.e. p1 polarized light and s1 polarized light.Wherein, first polarized light, the p1 polarized light directly passes right-angle triangle prism 1312, and outgoing is to compound eye lens group 14; And second polarized light, the s1 polarized light then is reflected onto on the faying face of isosceles triangle prism 1313 and right-angle triangle prism 1311, by entering quarter-wave plate 132 after this faying face reflection, incide on the reverberator 133 after passing quarter-wave plate 132, reverberator 133 makes incident light return prism 1313 along former road, when light beam passes through quarter-wave plate 132 once more, is converted to another first polarized light, be the p2 polarized light, this p2 polarized light passes prism 1311 outgoing to compound eye lens group 14.Herein, the effect of quarter-wave plate 132 is: make second polarized light, promptly s1 polarized light 2 times is by being converted to another first polarized light behind the quarter-wave plate 132, and promptly the p2 polarized light further improves light utilization efficiency.
In the embodiment of the present invention, light source module and reverberator 133, quarter-wave plate 132 parallel same prism, i.e. the same sides of isosceles triangle prism 1313 of being arranged at.First polarized light through prism 1312 direct transmissions: p1 polarized light, and through reverberator 133 reflections, again after wave plate 132 conversions, another first polarized light from prism 1311 transmissions: the p2 polarized light all exports compound eye lens group 14 to, promptly, the nonpolarized light of light source module outgoing all be converted to two bundles with equidirectional advance, the light of same polarization state, the p polarized light exports compound eye lens group 14 to, improves the efficiency of light energy utilization; Simultaneously, because part light (through the light of reverberator reflection) repeatedly passes through the polarization spectro rete, make another polarized light of outgoing: the p2 polarized light is purer.
In other embodiment of the present invention, because p1 polarized light through prism 1312 direct transmissions, and between the p2 polarized light of prism 1311 transmissions, there is optical path difference, the lens (consulting Fig. 4) of different focal can also be set between prism 1311,1312 and compound eye lens group 14, be used for shaping, to eliminate optical path difference, use the light beam unanimity that is incident upon compound eye lens group 14.
Compound eye lens group 14 is arranged on the emitting light path of polarization converter 13, is used for received polarized light, and for example p1 polarized light, p2 polarized light are done homogenising and handled.In the embodiment of the present invention, fly's-eye lens and back fly's-eye lens before compound eye lens group 14 comprises.Wherein, each fly's-eye lens constitutes by a plurality of single compound eyes.Preceding fly's-eye lens is used for light beam is divided into a plurality of beamlets, focuses on the fly's-eye lens of back.Back fly's-eye lens is used for single compound eye 141 of corresponding preceding fly's-eye lens is imaged on the little display panel 17 of monolithic, and different beamlets are overlapped on the little display panel 17 of monolithic, thereby uniform illumination is provided.
Optically focused shaping lens group 15 is arranged on the emitting light path of compound eye lens group 14, the little display panel 17 of the monolithic that is used to throw light on, shaping and outgoing meet the hot spot of little display panel 17 sizes of monolithic, and it comprises lens, in the embodiment of the present invention, it is a plano-convex lens, and, close on the curved surface 151 of compound eye lens group 14, embodiment is a convex surface, be aspheric surface, this aspheric surface is that the single compound eye 142 according to compound eye lens group 14 exit facet places carries out little five equilibrium design.Among the present invention,, make angle, position, the homogeneity of the little display panel 17 of each bundle emergent light irradiation monolithic all controlled, control the brightness of the little display panel 17 of monolithic, realize evenly illumination with this by controlling the angle of each bundle emergent light on each compound eye.Therefore, by the design of little five equilibrium, can effectively raise the efficiency and the homogeneity of whole optical engine.
In other embodiment of the present invention, optically focused shaping lens group 15 can also comprise two or more lens, and the curved surface that closes on compound eye lens group 14 is similarly aspheric surface, repeats no more here.
Polarizing beam splitter 16 is arranged on the emitting light path of optically focused shaping lens group 15, is used for polarization input beam and folded optical path.In the embodiment of the present invention, polarizing beam splitter 16 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 16 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 present invention, this polarizing beam splitter 16 also can be replaced by flat polarizing beam splitter.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.
The little display panel 17 of monolithic is arranged at a non-adjacent side of polarizing beam splitter 16 and optically focused shaping lens group 15, be used to modulate the polarized light that carries image information, promptly, 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 embodiment of the present invention, the little display panel 17 of monolithic is the reflective type silicon-based liquid crystal panel, its received polarized light is the p polarized light, after the modulation through the little display panel 17 of monolithic, be converted to the S polarized light that carries image information, and on its reflected back polarizing beam splitter 17,, this S polarized light is reflexed on the projecting lens by polarizing beam splitter 17 folded optical paths.In other words, the little display panel 17 of projecting lens and monolithic is arranged at respectively on the adjacent two sides of polarizing beam splitter 16.At this moment, projecting lens is to be used to throw the polarized light that carries image information, promptly carries the S polarized light of image information.
In other embodiment of the present invention, the little display panel 17 of monolithic can also receive s polarized light (consulting Fig. 2).
Therefore, in the micro projection optical engine based on three-color light source of the present invention, polarization converter is converted to two bundles to a branch of three look nonpolarized lights of light source module institute outgoing and advances with equidirectional, the polarized light of same polarization state, export compound eye lens group to and carry out the homogenising processing, light after homogenising is handled is successively by the optically focused shaping lens group, behind the polarizing beam splitter, the little display panel of illumination monolithic, be full of whole front panel, afterwards, modulate the polarized light that carries image information by the little display panel of monolithic, enter polarizing beam splitter once more, throw by projecting lens, output to external screen from projecting lens, its design of Optical System process only relates to the light source module, a polarization converter, compound eye lens group, the optically focused shaping lens group, a polarizing beam splitter, little display panel of monolithic and projecting lens do not relate to other optical device (for example closing optical element), employed optical element is less, simple in structure, compactness, good uniformity, efficiency of light energy utilization height, and, light path is shorter, and size is less, satisfies the market microminiaturization, light-weighted demand.
Figure 2 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of second embodiment of the invention, the structure of the light engine of this light engine and first embodiment is basic identical, and difference is that light source module shown in Figure 2 and reverberator 233, quarter-wave plate 232 are arranged at the relative both sides of different prisms respectively.This polarization converter 23 comprises 4 right-angle triangle prisms 2311,2312,2313,2314, and gummed constitutes first polarizing beam splitter and second polarizing beam splitter that includes the polarization spectro rete mutually.That is, prism 2311,2312 constitutes first polarizing beam splitter; Prism 2313,2314 constitutes second polarizing beam splitter.The light source module, promptly a plurality of light-emitting components 21, shaping mirror group 22 are arranged at the light entrance face place of first polarizing beam splitter.Reverberator 233, quarter-wave plate 232 are arranged at a side of second polarizing beam splitter.
In the embodiment of the present invention, the nonpolarized light of light source module outgoing by polarization converter 23 all be converted to two bundles with equidirectional advance, the light of same polarization state, promptly the s polarized light exports compound eye lens group 24 to.Its principle of work is: the nonpolarized light that a plurality of light-emitting components 21 produce is incident to polarization converter 23 by the refraction of shaping mirror group 22.When nonpolarized light was incident to first polarizing beam splitter, because the effect of polarization spectro rete, nonpolarized light was separated into first polarized light (s1 polarized light) and second polarized light (p1 polarized light).Wherein, s1 polarized light reflection back outgoing is to compound eye lens group 24; The p1 polarized light then is transmitted to second polarizing beam splitter, after being transmitted through quarter-wave plate 232, reverberator 233 by second polarizing beam splitter, return second polarizing beam splitter along former road, be converted to another first polarized light (s2 polarized light), by the reflection of second polarizing beam splitter, outgoing is to compound eye lens group 24 again.
Closing on the curved surface that closes on compound eye lens group in the curved surface, optically focused shaping lens group 25 of polarization converter 23 in the shaping mirror group 22 and be aspheric surface, all is to carry out little five equilibrium design according to single compound eye, repeats no more here.
In the embodiment of the present invention, the polarized light that the little display panel 27 of monolithic receives is the s polarized light.After the modulation through monolithic little display panel 27, will be converted to the P polarized light that carries image information, and with on its reflected back polarizing beam splitter 26, by polarizing beam splitter 26 folded optical paths, with this P polarized light transmission to projecting lens.In other words, projecting lens and the little display panel 27 of monolithic are arranged at the relative both sides of polarizing beam splitter 26, are used to throw the polarized light that carries image information, promptly carry the P polarized light of image information.
In the embodiment of the present invention, polarizing beam splitter 26 can repeat no more here for lens type polarizing beam splitter or flat polarizing beam splitter.
Figure 3 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of third embodiment of the invention, the structure of the light engine of this light engine and first embodiment is basic identical, difference is that polarization converter shown in Figure 3 33 comprises 3 right- angle triangle prisms 3311,3312,3313, and linear array is glued at one.Wherein 2 prisms 3311,3312 constitute the polarizing beam splitter that contains the polarization spectro rete, and are coated with reflective coating on the inclined-plane of another prism 3313 in 3 prisms.Light source module and reverberator 333, quarter-wave plate 332 are arranged at the adjacent both sides of same prism 3311 respectively.
The principle of work of this polarization converter 33 is: the nonpolarized light of light source module outgoing is incident to polarization converter 33.When nonpolarized light was incident to the polarizing beam splitter that prism 3311,3312 composes, because the effect of polarization spectro rete, nonpolarized light was separated into first polarized light (p1 polarized light) and second polarized light (s1 polarized light).Wherein, the p1 polarized light directly is transmitted through on the prism 3313, the reflection of the reflective coating of process prism 3313 end faces, and outgoing is to compound eye lens group 34; The s1 polarized light then is reflected, and by the prism 3311 that turns back again behind quarter-wave plate 332, the reverberator 333, is converted to another first polarized light, and promptly the p2 polarized light sees through prism 3312 outgoing to compound eye lens group 34.
Figure 4 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of four embodiment of the invention, the structure of the light engine of this light engine and first embodiment is basic identical, difference is also to walk abreast between polarization converter shown in Figure 4 43 and the compound eye lens group 44 and is provided with first lens 481 and second lens 482, is used for shaping, eliminates the optical path difference that polarization converter 43 produces.In the embodiment of the present invention, first lens 481 and second lens 482 are simple lens, and the focal length of first lens 481 is greater than the focal length of second lens 482; By the lens of different focal are set, be used for shaping, eliminate optical path difference, use the light beam unanimity that is incident upon compound eye lens group 44.
In other embodiment of the present invention, first lens and second lens can also be the lens combination that contains a plurality of lens, as long as the satisfied light beam that is incident upon compound eye lens group of using is consistent.
Figure 5 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of fifth embodiment of the invention, the structure of the light engine of this light engine and first embodiment is basic identical, difference is that polarization converter shown in Figure 5 53 comprises a parallelogram prism 531 and a Tp (not indicating among the figure), this parallelogram prism 531 is coated with polarization spectro rete 5311 with the one side that Tp glues together mutually, the one side that this parallelogram prism 531 is relative with being coated with the polarization spectro rete is coated with reflective coating 5312, and uncoated light-emitting face is provided with 1/2nd wave plates 532.This 1/2nd wave plate 532 can be glued on the end face of parallelogram prism 531.In the embodiment of the present invention, light source module and 1/2nd wave plates 532 are oppositely arranged.
The principle of work of this polarization converter 53 is: the nonpolarized light that a plurality of light-emitting components 51 produce is incident to polarization converter 53 by shaping mirror group 52.When nonpolarized light was incident to the polarization spectro rete 5311 of parallelogram prism 531, because the effect of polarization spectro rete, nonpolarized light was separated into first polarized light (p1 polarized light) and second polarized light (s1 polarized light).Wherein, the p1 polarized light directly is transmitted through compound eye lens group 54; The s1 polarized light then is reflected onto the reflective coating 5312 of parallelogram prism 531 end faces, and by reflective coating 5312 reflections, the deflection of 1/2nd wave plates 532 is converted to another first polarized light (p2 polarized light) outgoing to compound eye lens group 54.
Figure 6 shows that the planar structure synoptic diagram based on the micro projection optical engine of three-color light source of sixth embodiment of the invention, the structure of the light engine of this light engine and first embodiment is basic identical, difference is that polarization converter shown in Figure 6 63 comprises a flat-plate polarizing beam splitter 631 that is obliquely installed between light source module and compound eye lens group 64, the reverberator 633 that be arranged in parallel with flat-plate polarizing beam splitter 631, and be arranged at 1/2nd wave plates 632 between compound eye lens group 64 and the reverberator 633.Wherein, light source module and 1/2nd wave plates 632 are oppositely arranged.Flat-plate 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.
The principle of work of this polarization converter 63 is: the nonpolarized light that a plurality of light-emitting components 61 produce is incident to polarization converter 63 by shaping mirror group 62.When nonpolarized light was incident to flat-plate polarizing beam splitter 631, because the effect of polarization spectro rete, nonpolarized light was separated into first polarized light (p1 polarized light) and second polarized light (s1 polarized light).Wherein, the p1 polarized light directly is transmitted through compound eye lens group 64; The s1 polarized light then is reflected onto reverberator 633, reflexes to 1/2nd wave plates 632 by reverberator 633, and deflection is converted to another first polarized light (p2 polarized light) outgoing to compound eye lens group 64.
Therefore, in the micro projection optical engine based on three-color light source of the present invention, polarization converter a branch of three look nonpolarized lights of light source module institute outgoing be converted to two bundles with equidirectional advance, the polarized light of same polarization state, improve the efficiency of light energy utilization; Secondly, by being set, compound eye lens group improves homogeneity; In addition, three coloured light that the light source module sends are directly by polarization converter, compound eye lens group, the output of optically focused shaping lens group, behind polarizing beam splitter, offer the little display panel of monolithic, afterwards, the little display panel of monolithic modulates image light and enters projecting lens by polarizing beam splitter once more, output to external screen from projecting lens, the optical element of use is less, though the whole optical system design is based on three-color light source, close optical element but omitted, simple in structure, compact, and light path is shorter, size is less, satisfies market microminiaturization, light-weighted demand.
The embodiment of the above is a better embodiment of the present invention, be not to limit concrete practical range of the present invention with this, scope of the present invention comprises and is not limited to this embodiment that for example, red light-emitting element, blue light emitting element and green luminescence element are laser chip.Reverberator can also be the prism that is coated with reflective coating.In each embodiment, all can between polarization converter and compound eye lens group, be provided for shaping and eliminate the lens of the optical path difference that polarization converter produces.These lens can be first lens and second lens of mutual parallel arranged.And first lens and second lens can be the lens combination that contains a plurality of lens.In addition, the little display panel of monolithic is a transmissive liquid crystal panel etc.The equivalence variation that all shapes according to the present invention, structure are done all comprises in protection scope of the present invention.
Claims (15)
1. the micro projection optical engine based on three-color light source is characterized in that, comprising:
The light source module, its outgoing three look nonpolarized lights;
Polarization converter is arranged on the emitting light path of described light source module, a branch of three look nonpolarized lights of light source module outgoing be converted to two bundles with equidirectional advance, the polarized light of same polarization state;
Compound eye lens group is arranged at a side of described polarization converter, is used for that received polarized light is carried out homogenising and handles;
The optically focused shaping lens group is arranged on the emitting light path of described compound eye lens group;
Polarizing beam splitter is arranged on the emitting light path of described optically focused shaping lens group;
The little display panel of monolithic is arranged at the non-adjacent side of described polarizing beam splitter and optically focused shaping lens group, is used to modulate the polarized light that carries image information; And
Projecting lens is used to throw the described polarized light that carries image information.
2. the micro projection optical engine based on three-color light source according to claim 1, it is characterized in that, also walk abreast between described polarization converter and the compound eye lens group and be provided with first lens and second lens, be used for shaping, eliminate the optical path difference that described polarization converter produced.
3. the micro projection optical engine based on three-color light source according to claim 2 is characterized in that the focal length of described first lens is greater than the focal length of second lens.
4. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described light source module comprises:
At least one red light-emitting element, its outgoing red light beam;
At least one blue light emitting element, its outgoing blue light light beam;
At least one green luminescence element, its outgoing green beam; And
The shaping mirror group covers described red light-emitting element, blue light emitting element and green luminescence element.
5. the micro projection optical engine based on three-color light source according to claim 4 is characterized in that, described red light-emitting element, blue light emitting element and green luminescence element are light-emitting diode chip for backlight unit or laser chip.
6. the micro projection optical engine based on three-color light source according to claim 4, it is characterized in that, the curved surface that closes on described polarization converter in the described shaping mirror group is an aspheric surface, and its single compound eye according to described compound eye lens group plane of incidence place carries out little five equilibrium design.
7. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described optically focused shaping lens group comprises one or more tactic lens.
8. according to claim 1 or 7 described micro projection optical engines based on three-color light source, it is characterized in that, the curved surface that described optically focused shaping lens group is closed on described compound eye lens group is an aspheric surface, and its single compound eye according to described compound eye lens group exit facet place carries out little five equilibrium design.
9. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described polarization converter comprises:
At least 3 prisms are glued at one, have a plurality of faying faces, wherein, are coated with the polarization spectro rete at least one faying face, are used for described three look nonpolarized lights are separated into first polarized light and second polarized light;
Reverberator is arranged at a side of described prism, is used for the wherein a branch of polarized light of reflection, has identical direct of travel so that it restraints polarized light with another; And
Quarter-wave plate is arranged between described prism and the reverberator, is used for described second polarized light is converted to another first polarized light.
10. the micro projection optical engine based on three-color light source according to claim 9, it is characterized in that, described light source module and described reverberator, quarter-wave plate are arranged at the same side of same prism/different prisms, the perhaps relative both sides of different prisms, the perhaps adjacent both sides of same prism.
11. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described polarization converter comprises:
Tp;
The parallelogram prism glues together mutually with described Tp, and its cemented surface is coated with the polarization spectro rete, and the one side relative with being coated with the polarization spectro rete is coated with reflective coating; And
/ 2nd wave plates are arranged on the uncoated light-emitting face of described parallelogram prism.
12. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described polarization converter comprises:
Flat-plate polarizing beam splitter has the polarization spectro rete, is obliquely installed between described light source mirror group and compound eye lens group;
Reverberator be arranged in parallel with described flat-plate polarizing beam splitter; And
/ 2nd wave plates are arranged between described compound eye lens group and the reverberator.
13., it is characterized in that described light source module and described 1/2nd wave plates are oppositely arranged according to claim 11 or 12 described micro projection optical engines based on three-color light source.
14. the micro projection optical engine based on three-color light source according to claim 1 is characterized in that, described polarizing beam splitter is flat polarizing beam splitter or lens type polarizing beam splitter.
15. the micro projection optical engine based on three-color light source according to claim 1, it is characterized in that, the little display panel of described monolithic is arranged at a non-adjacent side of described polarizing beam splitter and optically focused shaping lens group, is silica-based liquid crystal panel or transmissive liquid crystal panel.
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| CN2009101079448A CN101923272A (en) | 2009-06-12 | 2009-06-12 | Miniature projection optical engine based on three-color light source |
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| CN2009101079448A CN101923272A (en) | 2009-06-12 | 2009-06-12 | Miniature projection optical engine based on three-color light source |
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| CN2009101079448A Pending CN101923272A (en) | 2009-06-12 | 2009-06-12 | Miniature projection optical engine based on three-color light source |
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| CN102809882A (en) * | 2012-07-12 | 2012-12-05 | 芜湖雅图数字视频技术有限公司 | Double-lamp illumination device and projector |
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| CN109458948A (en) * | 2018-11-23 | 2019-03-12 | 中国科学院长春光学精密机械与物理研究所 | A kind of contiguous concatenation microscopy survey method and system |
| CN115079501A (en) * | 2022-08-23 | 2022-09-20 | 深圳市橙子数字科技有限公司 | Projection lighting device |
| CN117590678A (en) * | 2024-01-19 | 2024-02-23 | 宜宾市极米光电有限公司 | Light combining system and projection device |
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| CN117590678A (en) * | 2024-01-19 | 2024-02-23 | 宜宾市极米光电有限公司 | Light combining system and projection device |
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Address after: Cui Jing Road Shenzhen City, Guangdong province 518118 Pingshan New District No. 35 No. 1 Building 6 East Applicant after: Butterfly Technology (Shenzhen) Limited Address before: 518057, 301, two, Fengyun technology building, Fifth Industrial Zone, North Ring Road, Shenzhen, Guangdong, Nanshan District Applicant before: Butterfly Technology (Shenzhen) Limited |
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Application publication date: 20101222 |