CN201780448U - Projection optics engine with even and clear image - Google Patents
Projection optics engine with even and clear image Download PDFInfo
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- CN201780448U CN201780448U CN2009202050029U CN200920205002U CN201780448U CN 201780448 U CN201780448 U CN 201780448U CN 2009202050029 U CN2009202050029 U CN 2009202050029U CN 200920205002 U CN200920205002 U CN 200920205002U CN 201780448 U CN201780448 U CN 201780448U
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Abstract
The utility model relates to a projection optics engine with an even and clear image, comprising a first light source module, a second light source module, a third light source module, a light combining module, a compound eye lens module, an integrated lens, a polarization converter, a uniwafer micro-display panel and a projection lens. The compound eye lens module is arranged on an emergence light path of the light combining module for homogenizing and shaping the received light; the integrated lens is arranged on the emergence light path of the compound eye lens; and the polarization converter is used for converting the received light into linear polarization light under the single polarization state. In the optics engine, the micro-display panel is evenly illuminated through the compound eye lens module; the optical energy consumption is reduced and the use ratio of the optical energy is improved through the polarization converter; besides, only one micro-display panel is used in the design process of the optical system, thereby the cost is low, the projection display image is even and clear, the quality is better and the high-quality requirement for the market is met.
Description
Technical field
The utility model relates to projection display technique, relates in particular to evenly projecting optical engine clearly of a kind of image that uses the three primary colours lighting device.
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 minitype projection machine module in China's utility model patent instructions, mainly is made up of light source assembly, dividing-mixing optical system, micro display chip and projection lens.Wherein, light source is the redgreenblue light source.Micro display chip is the LCOS liquid crystal panel that two adjacent orthogonal are provided with.Dividing-mixing optical system comprises flat-plate polarizing device and X-cube light-combining prism, perhaps flat-plate polarizing device and two dichroscopes.Three coloured light that three-color light source sends are injected the flat-plate polarizing device after this X-cube light-combining prism is synthetic; Perhaps ruddiness transmits through first dichroscope and second dichroscope, and blue light transmits from second dichroscope after the reflection of first dichroscope, and green glow reflects through second dichroscope, and the at last synthetic a branch of light of RGB light is injected the flat-plate polarizing device.The flat-plate polarizing device will be imported light and be converted to P polarized light and S polarized light, be input to two LCOS liquid crystal panels respectively, modulate output image light by two LCOS liquid crystal panel correlation light inlets, image light is imaged onto visual information projection external screen on by projection lens after the flat-plate polarizing device flows to projection lens after synthesizing.Yet no matter the minitype projection machine module of this structure is to shine the LCOS liquid crystal panel by light-combining prism or by the synthetic a branch of light of two dichroscopes, the image that projects, homogeneity are all relatively poor, and efficient is low, and this structure need adopt two LCOS liquid crystal panels, and cost is higher.
The utility model content
The technical problems to be solved in the utility model provides a kind of good uniformity, efficiency of light energy utilization height, and the Projection Display quality is good, and the low image of cost is projecting optical engine clearly evenly.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of image is projecting optical engine clearly evenly, comprises the three primary colours lighting device, little display panel of monolithic and projection lens.Wherein, the three primary colours lighting device comprises the first light source module, secondary light source module, the 3rd light source module, combined optical module, compound eye lens group, integration lens and polarization converter.The first light source module outgoing, first light beam.Secondary light source module outgoing second light beam.The 3rd light source module outgoing the 3rd light beam.First light beam, second light beam and the 3rd light beam that combined optical module is used to merge different-waveband are a branch of light.Compound eye lens group is arranged on the emitting light path of described combined optical module, is used for received light is carried out homogenising and shaping processing.Integration lens is arranged on the emitting light path of described compound eye lens group.Polarization converter is used for received light is converted to the linearly polarized light of single polarization state.The little display panel of monolithic is arranged on the emitting light path of described three primary colours lighting device, incident light is modulated, and modulated the image light that carries image information.Projection lens is used for the visual information projection on the little display panel of described monolithic is imaged onto screen.
Image of the present utility model is projecting optical engine clearly evenly, and by compound eye lens group wherein, little display panel evenly throws light on; Secondly,, reduce the loss of luminous energy, improve the utilization factor of luminous energy by polarization converter is set; In addition, the three primary colours light of three-color light source module institute outgoing is merged into a branch of light by combined optical module, outgoing is to compound eye lens group, carry out homogenising and shaping processing by compound eye lens group, and be converted to the linearly polarized light of single polarization state by polarization converter, by the little display panel of integration lens back lighting monolithic, be full of whole front panel, afterwards, modulate the polarized light that carries image information by the little display panel of monolithic, by the projecting lens projection, output to external screen from projecting lens, its design of Optical System process is only used the little display panel of a slice, cost is lower, the Projection Display image is evenly clear, and quality is better, satisfies the demand of market to high image quality.
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 even planar structure synoptic diagram of projecting optical engine clearly of the image of the utility model first embodiment.
Fig. 2 is the even planar structure synoptic diagram of projecting optical engine clearly of the image of the utility model second embodiment.
Fig. 3 is the even planar structure synoptic diagram of projecting optical engine clearly of the image of the utility model the 3rd embodiment.
Fig. 4 is the even planar structure synoptic diagram of projecting optical engine clearly of the image of the utility model the 4th embodiment.
Embodiment
Figure 1 shows that the even planar structure synoptic diagram of projecting optical engine clearly of image of the utility model first embodiment.Image evenly clearly projecting optical engine comprise the first light source module 11, secondary light source module 12, the 3rd light source module 13, combined optical module 20, compound eye lens group 30, polarization converter 40, integration lens 50, polarizing beam splitter 60, the little display panel 70 of monolithic and projecting lens (not shown).Wherein, the first light source module 11, secondary light source module 12, the 3rd light source module 13, combined optical module 20, compound eye lens group 30, polarization converter 40 and integration lens 50 constitute the three primary colours lighting device.
The first light source module, 11 outgoing, first light beam.Secondary light source module 12 outgoing second light beam.The 3rd light source module 13 outgoing the 3rd light beam.In the utility model embodiment, the first light source module 11 is the red-light source module, and first light beam is a red light beam.Secondary light source module 12 is the green-light source module, and second light beam is a green beam.The 3rd light source module 13 is the blue light source module, and the 3rd light beam is the blue light light beam.And the first light source module 11, secondary light source module 12, the 3rd light source module 13 are light emitting diode (Light Emitting Diode, LED) light source.
In other embodiment of the utility model, the first light source module 11 can also be the blue light source module, and first light beam of its outgoing is the blue light light beam.The 3rd light source module 13 is the red-light source module, and its outgoing the 3rd light beam is a red light beam.In a word, the first light source module 11, secondary light source module 12, the 3rd light source module 13 are three-color light source modules, are three primary colours light as long as satisfy the light of outgoing.
First light beam, second light beam and the 3rd light beam that combined optical module 20 is used to merge different-waveband are a branch of light.In the present embodiment, combined optical module 20 is an X-type color combination lens, is arranged at the intersection of the output light path of the first light source module 11, secondary light source module 12 and the 3rd light source module 13.Consult Fig. 1, this X-type color combination lens is flat X-type color combination lens (X-mirror), and it comprises and is configured to forked first flat board, 201, the second dull and stereotyped the 202 and the 3rd flat boards 203.And first flat board, 201, the second dull and stereotyped the 202 and the 3rd dull and stereotyped 203 surfaces all are coated with film (not indicating among the figure).
In other embodiment of the utility model, flat X-type color combination lens can also adopt four plate pack to synthesize cross shaped head, repeats no more here.
Compound eye lens group 30 is arranged on the emitting light path of combined optical module 20, is used for that received light is carried out homogenising and handles, and it comprises first microlens array 301 and second microlens array of arranging along the light path sequential parallel 302.Wherein, each microlens array all is a plurality of identical or different lenticular array combination.First microlens array 301 is used for light beam is divided into a plurality of beamlets, focuses on second microlens array 302.Second microlens array 302 and integration lens 50 are imaged on the little display panel 70 of monolithic to the lenticule of first microlens array 301 of correspondence together, and different beamlets are overlapped on the little display panel 70 of monolithic, thereby uniform illumination is provided.Again, this first microlens array 301 and second microlens array 302 can be integrated in one by transparent entity (as sheet glass), also can be discrete.
In the utility model embodiment, compound eye lens group 30 also has the beam shaping function,, the special-shaped hot spot of incident is converted into the rectangular light spot of shape such as little display panel 70 active zones of monolithic (being generally 4: 3 or 16: 9) that is.In the embodiment, the aspect ratio consistent size of lenticular aspect ratio size and the little display panel 70 of monolithic.For example: longitudinal size: lateral dimension is 3: 4 or 9: 16.Employing has the lenticule with little display panel 70 identical aspect ratio of monolithic, helps obtaining all reasonable illumination hot spot of capacity usage ratio and homogeneity.Again, this lenticule is spherical lens or non-spherical lens.Lenticule is the rectangle lenticule.
In other embodiment of the utility model, the lenticule on the compound eye lens group 30 can also be a circular microlens.Lenticular radius-of-curvature in first microlens array 301 can be identical with lenticular radius-of-curvature in second microlens array 302, also can be different.Certainly, compound eye lens group 30 can also be that a row microlens array that only is bonded by a plurality of identical or different lenticules constitutes.
In the utility model, also be provided with shaping lens 80 between X-type color combination lens and the compound eye lens group 30, be used to reduce the angle of divergence of emergent light.
In other embodiment of the utility model, integration lens 50 can also comprise a plurality of tactic lens.Wherein a part of lens close on the little display panel 70 of monolithic and are provided with, and usually the lens that close on the little display panel 70 of monolithic are called field lens; Adopt the structure of field lens, make to project the outer refraction of optical beam of screen originally to screen, and then avoided projected picture the non-uniform phenomenon that the middle part is brighter, the edge is darker to occur.
Polarization converter 40 is arranged between compound eye lens group 30 and the integration lens 50, is used for received light is converted to the linearly polarized light of single polarization state.That is, polarization converter 40 can all be converted to s light or p light to the light of incident, improves light efficiency.Therefore, the natural light of light source module institute outgoing is exported the linearly polarized light of single polarization state through behind the polarization converter.In the utility model embodiment, the quantity of polarization converter 40 is one, can be made up of several prisms that combines continuously.For example: form by 2 right-angled trapezium prisms and a plurality of parallelogram prism gummed, the light shielding part of avoiding veiling glare to enter is set on the plane of incidence of a part of prism.Be coated with polarization beam splitter on the faying face between the prism.The exit facet of another part prism is provided with 1/2nd wave plates (not indicating among the figure).In other words, 1/2nd wave plates are that opposing parallel is arranged on the end face of different prisms with light shielding part.In the utility model embodiment, 1/2nd wave plates are arranged on the prism facets of whole P linearly polarized lights ejaculations.Therefore, this polarization converter 40 all is converted to the S linearly polarized light to incident light, and outgoing is to polarizing beam splitter 60.In addition, polarization converter 40 is arranged on the focal plane place of compound eye lens group 30, makes the light of compound eye lens group 30 outgoing focus on effective light region of acceptance (non-light shielding part place) of polarization converter 40, makes full use of incident light, effectively improves light efficiency.
In other embodiment of the utility model, polarization converter can also compose other shape by other prism.On the faying face between each prism polarization beam splitter or reflecting surface can be set, and, polarization beam splitter and reflecting surface alternate configurations.
Polarizing beam splitter 60 is arranged on the emitting light path of lighting device, that is, and and on the input path of the little display panel 70 of monolithic.In the utility model embodiment, polarizing beam splitter 60 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 separated the S linearly polarized light in the incident light, P linearly polarized light.Certainly, polarizing beam splitter 60 also can compose other shape by other prism, as long as the S linearly polarized light in the incident light, P linearly polarized light can be separated.
In other embodiment of the utility model, this polarizing beam splitter 60 also can be replaced by flat polarizing beam splitter.Here repeat no more.
70 pairs of incident lights of the little display panel of monolithic are modulated, and modulate the image light that carries image information.That is, be used for received linearly polarized light is modulated, be converted to another linearly polarized light vertical, and make this another linearly polarized light carry image information with this linearly polarized light.In the present embodiment, the little display panel 70 of monolithic be the reflective type silicon-based liquid crystal panel (Liquid Crystal on Silicon, LCOS).When the linearly polarized light that receives when the little display panel 70 of monolithic is the S linearly polarized light, after the modulation through the little display panel 70 of monolithic, then reflect another linearly polarized light P linearly polarized light that carries image information, this P linearly polarized light is transmitted through on the projection lens via polarizing beam splitter.That is, the little display panel 70 opposing parallel settings of projection lens and monolithic are used for the visual information projection on the little display panel 70 of monolithic is imaged onto screen.
Therefore, projecting optical engine of the present utility model, by compound eye lens group wherein, little display panel evenly throws light on; Secondly,, reduce the loss of luminous energy, improve the utilization factor of luminous energy by polarization converter is set; In addition, the three primary colours light of three-color light source module institute outgoing is merged into a branch of light by X-type color combination lens, outgoing is to compound eye lens group, carry out homogenising and shaping processing by compound eye lens group, and be converted to the linearly polarized light of single polarization state by polarization converter, pass through integration lens successively, 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, by the projecting lens projection, output to external screen from projecting lens, its design of Optical System process is only used the little display panel of a slice, cost is lower, the Projection Display image is evenly clear, and quality is better, satisfies the demand of market to high image quality.
Figure 2 shows that the even planar structure synoptic diagram of projecting optical engine clearly of image of the utility model second embodiment.The structure of the projecting optical engine of this projecting optical engine and first embodiment is basic identical, difference is that X-type color combination lens shown in Figure 2 is that lens type X-type color combination lens (X-cube) 20 ', the first light source module 11, secondary light source module 12 and the 3rd light source module 13 are arranged at respectively on three sides of lens type X-type color combination lens 20 '.
Consult Fig. 2,1/2nd wave plates in the polarization converter 40 ' (indicating among the figure) are arranged on the prism facets of whole S linearly polarized lights ejaculations, and in other words, 1/2nd wave plates and light shielding part opposing parallel are arranged on the end face of same prism.Therefore, this polarization converter 40 ' all is converted to the P linearly polarized light to incident light, and outgoing is to polarizing beam splitter 60 '.
In addition, polarizing beam splitter 60 ' 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 face, 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 the utility model embodiment, the little display panel 70 received linearly polarized lights of monolithic are the P linearly polarized light, after the modulation through the little display panel 70 of monolithic, reflect another linearly polarized light S linearly polarized light that carries image information, this S linearly polarized light is reflexed on the projection lens (not shown) via polarizing beam splitter 60 '.In other words, the little display panel 70 adjacent settings of projection lens and monolithic.At this moment, projection lens is that the S light that will carry image information on the little display panel 70 of monolithic carries out projection imaging.
Figure 3 shows that the even planar structure synoptic diagram of projecting optical engine clearly of image of the utility model the 3rd embodiment.The structure of the projecting optical engine of this projecting optical engine and first embodiment is basic identical, and difference is that combined optical module shown in Figure 3 21 comprises first dichroic mirror 211 and second dichroic mirror 212.Wherein, first dichroic mirror 211 is obliquely installed in the intersection of the light emitting light path of the first light source module 11 ', secondary light source module 12 ', is used for transmission first light beam, reflects second light beam.Second dichroic mirror 212 is obliquely installed between the 3rd light source module 13 ' and compound eye lens group 30 ', and is parallel to first dichroic mirror 211, is used for transmission the 3rd light beam, reflects first light beam, second light beam.
In the utility model, the first light source module 11 ' is red-light source module or blue light source module, its outgoing red light beam or blue light light beam.Secondary light source module 12 ' is the green-light source module, its outgoing green beam.The 3rd light source module 13 ' is blue light source module or red-light source module, its outgoing blue light light beam or red light beam.Therefore, green beam is to reflex to second dichroic mirror 212 by first dichroic mirror 211, reflex to compound eye lens group 30 ' by second dichroic mirror 212 afterwards, under the situation of green glow reflectivity greater than transmissivity, this structure can effectively reduce the energy loss of green glow.
Again, between first dichroic mirror 211 and second dichroic mirror 212, and be respectively arranged with shaping lens 80 ' between second dichroic mirror 212 and the compound eye lens group 30 ', be used to reduce the angle of divergence of emergent light.
In the utility model embodiment, polarization converter 41 is arranged on the emitting light path of compound eye lens group 30 ' equally, is used for incident light all is converted to the P linearly polarized light, and outgoing is to polarizing beam splitter 61.
Consult Fig. 4, by the position of conversion 1/2nd wave plates, polarization converter 41 ' can also all be converted to the P linearly polarized light to incident light.At this moment, the little display panel 71 received linearly polarized lights of monolithic are the P linearly polarized light.And the little display panel 71 adjacent settings with projection lens of monolithic.This projection lens is that the S light that will carry image information on the little display panel 71 of monolithic carries out projection imaging.
Therefore, the image of present embodiment is projecting optical engine clearly evenly, same compound eye lens group by wherein, and little display panel evenly throws light on; Secondly,, reduce the loss of luminous energy, improve the utilization factor of luminous energy by polarization converter is set; In addition, the three-color light source module is merged into a branch of light by two dichroic mirrors, outgoing is to compound eye lens group, carry out homogenising and shaping processing by compound eye lens group, and be converted to the linearly polarized light of single polarization state by polarization converter, pass through integration lens successively, 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, by the projecting lens projection, output to external screen from projecting lens, its design of Optical System process is equally only used the little display panel of a slice, cost is lower, the Projection Display image is evenly clear, and quality is better, satisfies the demand of market to high image quality.
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, the first light source module, secondary light source module, the 3rd light source module are LASER Light Source or array area source.Again, the quantity of polarization converter is one or more, perhaps is arranged at the emitting light path of combined optical module, perhaps is arranged at respectively between the first light source module, secondary light source module, the 3rd light source module and the combined optical module.In addition, the little display panel of monolithic be transmissive liquid crystal panel (LiquidCrystal Display, LCD), at this moment, omit polarizing beam splitter, transmissive liquid crystal panel is arranged on the emitting light path of lighting device, incident light is modulated, and transmitted the light that carries image information.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 (14)
1. the even projecting optical engine clearly of an image comprises:
The three primary colours lighting device 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; And
Combined optical module, first light beam, second light beam and the 3rd light beam that are used to merge different-waveband are a branch of light;
The little display panel of monolithic is arranged on the emitting light path of described three primary colours lighting device, incident light is modulated, and modulated the image light that carries image information; And
Projection lens is used for the visual information projection on the little display panel of described monolithic is imaged onto screen;
It is characterized in that described three primary colours lighting device also comprises:
Compound eye lens group is arranged on the emitting light path of described combined optical module, is used for received light is carried out homogenising and shaping processing;
Integration lens is arranged on the emitting light path of described compound eye lens group; And
Polarization converter is used for received light is converted to the linearly polarized light of single polarization state.
2. image according to claim 1 is projecting optical engine clearly evenly, it is characterized in that, described compound eye lens group is a plurality of identical or different lenticular array combination, the aspect ratio consistent size of described lenticular aspect ratio size and the little display panel of described monolithic.
3. image according to claim 2 is projecting optical engine clearly evenly, it is characterized in that described lenticule is spherical lens or non-spherical lens.
4. image according to claim 1 is projecting optical engine clearly evenly, it is characterized in that described integration lens comprises one or more tactic lens.
5. image according to claim 1 is projecting optical engine clearly evenly, it is characterized in that, described polarization converter is arranged at the place, focal plane of described compound eye lens group, perhaps be arranged between described combined optical module and the compound eye lens group, perhaps be arranged at respectively between the described first light source module, secondary light source module, the 3rd light source module and the combined optical module.
6. image according to claim 1 is projecting optical engine clearly evenly, it is characterized in that described combined optical module is an X-type color combination lens, is arranged at the intersection of the output light path of the described first light source module, secondary light source module and the 3rd light source module.
7. image according to claim 6 is projecting optical engine clearly evenly, it is characterized in that described X-type color combination lens is flat X-type color combination lens or lens type X-type color combination lens.
8. image according to claim 6 is projecting optical engine clearly evenly, it is characterized in that, also is provided with shaping lens between described X-type color combination lens and the compound eye lens group, is used to reduce the angle of divergence of emergent light.
9. image according to claim 1 is projecting optical engine clearly evenly, it is characterized in that described combined optical module comprises:
First dichroic mirror is obliquely installed in the intersection of the light emitting light path of the described first light source module, secondary light source module, is used for described first light beam of transmission, reflects described second light beam; And
Second dichroic mirror is obliquely installed between described the 3rd light source module and compound eye lens group, and is parallel to described first dichroic mirror, is used for described the 3rd light beam of transmission, reflects described first light beam, second light beam.
10. image according to claim 9 is projecting optical engine clearly evenly, it is characterized in that, between described first dichroic mirror and second dichroic mirror, and be respectively arranged with shaping lens between described second dichroic mirror and the compound eye lens group, be used to reduce the angle of divergence of emergent light.
11., it is characterized in that the described first light source module is red-light source module or blue light source module, its outgoing red light beam or blue light light beam according to the even projecting optical engine clearly of any described image of claim 1 to 10; Described secondary light source module is the green-light source module, its outgoing green beam; Described the 3rd light source module is blue light source module or red-light source module, its outgoing blue light light beam or red light beam.
12., it is characterized in that the described first light source module, secondary light source module, the 3rd light source module are led light source, LASER Light Source or array area source according to the even projecting optical engine clearly of any described image of claim 1 to 10.
13. according to the even projecting optical engine clearly of any described image of claim 1 to 10, it is characterized in that the little display panel of described monolithic is LCOS, also be provided with polarizing beam splitter on its input path; Described polarizing beam splitter is flat polarizing beam splitter or lens type polarizing beam splitter.
14., it is characterized in that the little display panel of described monolithic is LCD according to the even projecting optical engine clearly of any described image of claim 1 to 10.
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| CN2009202050029U CN201780448U (en) | 2009-09-21 | 2009-09-21 | Projection optics engine with even and clear image |
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| CN2009202050029U CN201780448U (en) | 2009-09-21 | 2009-09-21 | Projection optics engine with even and clear image |
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- 2009-09-21 CN CN2009202050029U patent/CN201780448U/en not_active Expired - Lifetime
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