CN1271445C - Optical engine lighting system - Google Patents
Optical engine lighting system Download PDFInfo
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- CN1271445C CN1271445C CN 200410066601 CN200410066601A CN1271445C CN 1271445 C CN1271445 C CN 1271445C CN 200410066601 CN200410066601 CN 200410066601 CN 200410066601 A CN200410066601 A CN 200410066601A CN 1271445 C CN1271445 C CN 1271445C
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Abstract
The present invention relates to an optical engine lighting system used in the technical field of projection, which has the structure that a light source is arranged on a focus of an ellipsoidal reflection bowl, and light beams of the light source are focused on the other focus of the ellipsoidal reflection bowl so as to form an incident white light spot of the system; otherwise, a lighting source is arranged on a focus of a parabolic type reflection bowl, and light beams of the lighting source are emitted approximately in parallel after reflected by the parabolic type reflection bowl and then form the incident white light spot of the system after focused; the white light spot is emitted in a non-array polarization prism assembly on the rear end, the polarization state of the output light beams is controlled by the non-array polarization prism assembly, and the polarization light converted by the non-array polarization prism assembly is emitted on a grating device positioned in the position in the exit direction of the light beams of the non-array polarization prism assembly; the white light is divided into chromatogram light through the grating in the space, the chromatogram light is collected by a light rod device, the chromatogram light beams are reflected in the light rod device for many times for evening the light, and the output end of the light rod device forms rectangular even light spots. The present invention has the advantages of simple manufacture, low cost and practicality.
Description
Technical field
The present invention relates to a kind of optical engine lighting system, particularly a kind of optical engine lighting system that contains grating and optical wand device is used for the shadow casting technique field.
Background technology
Illuminator is the important component part of projection display equipment light engine, and the cost and the main performance index of projection display equipment had a significant impact.Light engine is very high to the requirement of lighting system, mainly comprise: the illumination in the full field range is very even, the efficiency of light energy utilization is big as far as possible, the illumination light field is the very high linearly polarized light of degree of polarization, the spectral range of illumination light is very wide and intensity is balanced, and the direction of vibration of each chromatogram channel line polarized light can be adjusted etc. on demand.
Find through open source literature retrieval prior art, U.S. Pat 5986809, patent name: Polarization conversion element, polarization illuminator, display usingthe same illuminator, and projection type display (polarization conversion device, the polarization illumination device and comprise the projection display equipment of this device), this patent adopts fly_eye lens array, the light beam that is called PCS (Polarizing Convert System) array separates converter and as the dichroic mirror of beam splitter, add the light sources of parabolic shape reflector, constitute the lamp optical system of light engine.Fly_eye lens array is the lens combination that is composited by a lot of single-element lenss, it carries out space segmentation to the light distribution of lighting space, each lens unit all projects the inhomogeneous light field that it covered in LCD or the LCoS chip apparent field scope, suitably increase unit number, can improve even light mixing; Each unit of PCS array just in time with the corresponding unit coupling of back fly_eye lens array, each PCS unit not only makes nonpolarized light be decomposed into two linear polarization components of P, S, be translated into the linearly polarized light output of same exit direction and same polarization state (or P, or S) again respectively.Fly_eye lens array, PCS array light source and dichroic mirror beam splitting system that the tradition projection display equipment is adopted, exist the technology complexity, product percent of pass is low and a difficult problem such as cost height, and uses the projected picture of dichroic mirror beam splitting system to have defectives such as colour cast.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, propose a kind of optical engine lighting system, make it to have and make advantages such as simple, with low cost and practicability, be used in orthogonal projection display device and rear projection display apparatus.For realizing such purpose, the optical engine lighting system of the present invention's design, the fly_eye lens array of abandoning tradition, PCS array and dichroic mirror, and realize the beam split of each chromatogram by grating device, realize the independently even light of each chromatogram (i.e. so-called " light integration ") by the optical wand device, the control of output polarization state is then finished by the polarizing prism of non-array structure.
The present invention is achieved by the following technical solutions, comprising: light source, spheroid shape or parabolic type reflector, non-array polarizing prism group, grating device, optical wand device.Light source places on the focus of spheroid shape reflector, and its light beam converges in another focus of spheroid shape reflector, forms the incident white light hot spot of system; Or lighting source places on the focus of parabolic type reflector, and its light beam is approximate parallel outgoing after the reflection of parabolic type reflector, through converging the incident white light hot spot of formation system.The white light hot spot incides the non-array polarizing prism group of rear end, the polarization state of output beam is by the non-array polarizing prism group control of gummed, degree of polarization depends on the depth of parallelism of incident light, the gummed beam-splitting surface of prism group is decomposed into transmission P component and reflection S component with the incident directional light, wherein the S component after prism reflects once more along former optical axis direction outgoing, and the P component becomes S component (or the direct outgoing of P component, the S component becomes the P component through the half-wave plate phase inversion) through the half-wave plate phase inversion, and the efficiency of light energy utilization significantly improves.The polarized light that has converted certain components to incides on the grating device, grating device is positioned at non-array polarizing prism group along on the position of light beam exit direction, utilize the beam split function of grating that white light spatially is divided into different chromatograms, use a plurality of (being generally three) optical wand device respectively required chromatogram light to be collected afterwards, generally be divided into the RGB three-beam, the contained spectral range of every bundle light can be adjusted by the position of mobile optical wand device, different chromatogram light beams repeatedly reflect even light in optical wand, be so-called light integral mean, form rectangular uniform light spots at the optical wand output terminal.
The non-array polarizing prism group of described control bundle polarization state, desirable multiple textural association, comprising parallelogram prism and the combination of right angle isoceles triangle prism, comprise and to realize incident light is resolved into P component and S component earlier, make other prism combination of these two components then again with same direction and same polarization state outgoing.
Grating device can be plane grating or curved surface grating, and any configuration combination that can realize the grating beam splitting function all comprises within the scope of the present invention.Most preferably scheme is the concave surface blazed grating, and with linearly polarized light incident, can improve the efficiency of light energy utilization like this, and effectively reduces the total system volume.
The optical wand device can be the solid bar of light at solid light transmission medium internal communications such as glass, plastics, also can be the hollow bar that light reflects in the air space that is surrounded by the solid reflecting interface; The optical wand device can be six cylinder prisms of elongated shape, also can be corner prism; The incident end face of optical wand device is a square or rectangular, and the length breadth ratio of outgoing end face can be identical with the length breadth ratio of LCD chip or LCoS chip according to the difference of subsequent optical path configuration, or have other length breadth ratio; Incident end face and outgoing end face can be parallel to each other, also can be not parallel.Said solid bar, comprise that orthogonal two principal sections (face that contains primary optical axis) are the cylindricality optical wand of rectangle, or orthogonal two principal sections are trapezoidal taper optical wand, and one of them principal section is that rectangle, another vertical with it principal section are trapezoidal taper optical wand.Cylindrical rod surface and former and later two logical optical surfaces of tapered rod can plate anti-reflection film, also plated film not; All the other four surfaces can plated film, also plated film not.Said hollow bar comprises that two orthogonal principal sections (face that contains primary optical axis) are the cylindricality optical wand of rectangle, and one of them principal section is rectangle, and another vertical with it principal section is trapezoidal taper optical wand.Reflectance coating is all plated at hollow cylindrical optical wand interface and conical hollow optical wand interface usually.
The present invention has characteristics such as making simple, with low cost and practicability.Adopt grating and optical wand device to realize the even light of illumination light field, the traditional fly_eye lens array of its texture ratio is much simple, and processing and dress gyp skill are also greatly simplified, help reducing cost, and the compressible spot size and the angle of divergence simultaneously, thus improve the light source utilization factor.In addition, use the polarization output of the ahrens prism group realization all-optical field of non-array, its structure and technical difficulty also the PCS array than traditional are simple, and cost is also much lower.
The present invention is applicable to just throwing projection display equipment or the rear-projection projection display equipment that transmission type LCD chip and reflective LCoS chip are formed.
Description of drawings
Fig. 1 is an optical engine lighting system structural representation of the present invention.
Fig. 2 is the structural representation of optical engine lighting system specific embodiment of the present invention.
Fig. 3 is the structural representation that contains the projection display equipment embodiment one of optical engine lighting system of the present invention.
Fig. 4 is the structural representation that contains the projection display equipment embodiment two of optical engine lighting system of the present invention.
Fig. 5 is the structural representation that contains the projection display equipment embodiment three of optical engine lighting system of the present invention.
Fig. 6 is the structural representation that contains the projection display equipment embodiment four of optical engine lighting system of the present invention.
Embodiment
As shown in Figure 1, the present invention includes: white light source 1, spheroid shape reflector 2, non-array polarizing prism group 3, grating device 4, optical wand device 5,6,7.White light source 1 places on the focus of spheroid shape reflector 2, and its white light beam converges at another focus place of spheroid shape reflector, forms the launching spot of system.Launching spot incides on the non-array polarizing prism group 3, the beam-splitting surface of non-array polarizing prism group 3 is decomposed into transmission P component and reflection S component with incident light, wherein along the optical axis direction outgoing, and the P component is converted to the S component to the S component behind half-wave plate after prism reflects once more.As half-wave plate being moved to the prism below, then system exports the P polarized light.The specific polarization light that obtains continues to incide on the concave surface blazed grating device 4, concave surface blazed grating device 4 is with the white light beam beam split, white light beam is spatially arranged according to different chromatograms, collected by three optical wand devices 5,6,7, wherein optical wand device 5 is collected red light, optical wand device 6 is collected green light, and optical wand device 7 is collected blue light, and the contained light-wave band scope of every coloured light can be regulated by the position of moving three optical wand devices.The RGB three-beam repeatedly reflects even light respectively in three optical wand devices 5,6,7, obtain uniform RGB light beam output respectively at three optical wand devices, 5,6,7 output port places.
As shown in Figure 2, be the structural representation of optical engine lighting system specific embodiment of the present invention, on Fig. 1 basis, increased collimation optics 8 and lens combination 9.Collimation optics 8 is in spheroid shape reflector 2 rear ends, and it is coaxial with it, lens combination 9 is between grating device 4 and three optical wand devices, 5,6,7 input ends, white light source 1 places on the focus of spheroid shape reflector 2, its white light beam converges at another focus place of spheroid shape reflector 2, forms the launching spot of system.Launching spot incides on the non-array polarizing prism group 3 with the small divergence angle light beam through collimation optics 8 modulation backs, the beam-splitting surface of non-array polarizing prism group 3 is decomposed into transmission P component and reflection S component with incident light, wherein along the optical axis direction outgoing, and the P component is converted to the S component to the S component behind half-wave plate after prism reflects once more.As half-wave plate being moved to the prism below, then system exports the P polarized light.The specific polarization light that obtains continues to incide on the concave surface blazed grating device 4, concave surface blazed grating device 4 is with the white light beam beam split, white light beam is spatially arranged according to different chromatograms, collected by three optical wand devices 5,6,7 through lens combination 9 backs again, wherein optical wand device 5 is collected red light, optical wand device 6 is collected green light, and optical wand device 7 is collected blue light, and the contained light-wave band scope of every coloured light can be regulated by the position of moving three optical wand devices.The RGB three-beam repeatedly reflects even light respectively in three optical wand devices 5,6,7, obtain uniform RGB light beam output respectively at three optical wand devices, 5,6,7 output port places.
As shown in Figure 3, being the structural representation of the projection display equipment embodiment one that contains optical engine lighting system of the present invention, is the three-lens formula liquid-crystal projecting displaying device that cooperates three transmission type LCD chips to constitute, and throws or the rear-projection projection display equipment before can being used for.Among the figure element 1-9 all with Fig. 2 in identical.After three optical wand device output end mouth places obtain uniform RGB light beam output respectively, shine respectively on the transmission type LCD chip assembly 11,12,13 after the RGB three light beam scioptics groups 10, after 11,12,13 modulation of transmission type LCD chip assembly, be projected on the screen 17 by three-lens 14,15,16 respectively, RGB three images through ovennodulation close light on screen 17, obtain coloured image.
Figure 4 shows that the structural representation of the projection display equipment embodiment two that contains optical engine lighting system of the present invention, is the three-lens formula liquid-crystal projecting displaying device that cooperates three reflective LCoS chips to constitute, and throws or the rear-projection projection display equipment before can being used for.Among the figure element 1-9 all with Fig. 2 in identical.After three optical wand device output end mouth places obtain uniform RGB light beam output respectively, shine on the reflective LCoS chip assembly 24,25,26 by three polarising beam splitters 21,22,23 respectively after the RGB three light beam scioptics groups 18,19,20, after reflective LCoS chip assembly 24,25,26 modulation, be projected on the screen 17 by three polarising beam splitters 21,22,23 and three-lens 27,28,29 respectively, RGB three images through ovennodulation close light on screen 17, obtain coloured image.
Figure 5 shows that the structural representation of the projection display equipment embodiment three that contains optical engine lighting system of the present invention, is the single-lens formula liquid-crystal projecting displaying device that cooperates single-slice transmission type LCD chip to constitute, and throws or the rear-projection projection display equipment before can being used for.Among the figure element 1-9 all with Fig. 2 in identical.After three optical wand device output end mouth places obtain uniform RGB light beam output respectively, on the RGB three light beam scioptics groups 10 back irradiation rotating prism devices 30, tri-color beam by 30 effects of rotating prism device shines transmission type LCD chip assembly 32 after the scioptics group 31 again, the three coloured light rectangular area of on transmission type LCD chip assembly 32, throwing light on respectively, long limit, this rectangular area is projected to imaging on the screen 17 by camera lens 33 greater than certain one side of LCD chip again through the tri-color beam after 32 modulation of transmission type LCD chip assembly.Rotate rotating prism device 30, then roll with a certain direction in three coloured light, three rectangular areas of throwing light on transmission type LCD chip assembly 32, rotating prism device 30 rotates continuously, then three rectangular areas covered the whole effectively logical optical surface of LCD chip successively, can obtain the coloured image of full visual field this moment on screen 17.
Figure 6 shows that the structural representation of the projection display equipment embodiment four that contains optical engine lighting system of the present invention, is the single-lens formula liquid-crystal projecting displaying device that cooperates single-slice transmission type LCoS chip to constitute, and throws or the rear-projection projection display equipment before can being used for.Among the figure element 1-9 all with Fig. 2 in identical.After three optical wand device output end mouth places obtain uniform RGB light beam output respectively, on the RGB three light beam scioptics 10 back irradiation rotating prism devices 30, tri-color beam by rotating prism device 30 effect is scioptics group 34 again, 35 and polarising beam splitter 36 after shine reflective LCoS chip assembly 37, the three coloured light rectangular area of on reflective LCoS chip assembly 37, throwing light on respectively, long limit, this rectangular area is crossed polarising beam splitter 36 backs through the tri-color beam transmission after reflective LCoS chip assembly 37 modulation and is projected to imaging on the screen 17 by camera lens 38 greater than certain one side of LCoS chip.Rotate rotating prism device 30, then roll with a certain direction in three coloured light, three rectangular areas of throwing light on reflective LCoS chip assembly 37, rotating prism device 30 rotates continuously, then three rectangular areas covered the whole effectively logical optical surface of LCoS chip successively, can obtain the coloured image of full visual field this moment on screen 17.
Claims (9)
1, a kind of optical engine lighting system, comprise: light source (1), spheroid shape or parabolic type reflector (2), non-array polarizing prism group (3), optical wand device (5,6,7), it is characterized in that, also comprise: grating device (4), light source (1) places on the focus of spheroid shape reflector (2), its light beam converges in another focus of spheroid shape reflector (2), forms the incident white light hot spot of system; Or lighting source (1) places on the focus of parabolic type reflector (2), its light beam is approximate parallel outgoing after parabolic type reflector (2) reflection, through converging the incident white light hot spot of formation system, the white light hot spot incides the non-array polarizing prism group (3) of rear end, the polarization state of output beam is by non-array polarizing prism group (3) control of gummed, polarized light through non-array polarizing prism group (3) conversion incides on the grating device (4), grating device (4) is positioned at non-array polarizing prism group (3) along on the position of light beam exit direction, by grating device (4) white light spatially is divided into each chromatogram, afterwards again by optical wand device (5,6,7) respectively required chromatogram light is collected, the contained spectral range of every bundle light is by mobile optical wand device (5,6,7) position is adjusted, each chromatogram light beam is at optical wand device (5,6,7) repeatedly reflect even light in, at optical wand device (5,6,7) output terminal forms uniform light spots.
2, optical engine lighting system according to claim 1, it is characterized in that, the gummed beam-splitting surface of described non-array polarizing prism group (3) is decomposed into transmission P component and reflection S component with the incident directional light, wherein the S component after prism reflects once more along former optical axis direction outgoing, and the P component becomes the S component through the half-wave plate phase inversion, or the direct outgoing of P component, the S component becomes the P component through the half-wave plate phase inversion.
3, optical engine lighting system according to claim 1 and 2, it is characterized in that, described non-array polarizing prism group (3), be multiple textural association, comprising parallelogram prism and the combination of right angle isoceles triangle prism, comprise and to realize incident light is resolved into P component and S component earlier, make of any prism combination of these two components then again with same direction and same polarization state outgoing.
4, optical engine lighting system according to claim 1, it is characterized in that, increase collimation optics (8) and lens combination (9), collimation optics (8) is in spheroid shape or parabolic type reflector (2) rear end, and it is coaxial with it, incident white light hot spot incides on the non-array polarizing prism group (3) with the small divergence angle light beam through collimation optics (8) modulation back, and lens combination (9) is positioned between grating device (4) and three optical wand devices (5,6, the 7) input end.
5, optical engine lighting system according to claim 1 is characterized in that, described grating device (4) is the configuration combination that plane grating or curved surface grating are realized the grating beam splitting function, and with linearly polarized light incident.
6, optical engine lighting system according to claim 5 is characterized in that, described grating device (4) is the configuration combination that the concave surface blazed grating can be realized the grating beam splitting function.
7, optical engine lighting system according to claim 1, it is characterized in that, described optical wand device (5,6,7) is the solid bar of light at solid light transmission medium internal communication, or the hollow bar that in the air space that surrounds by the solid reflecting interface, reflects of light, optical wand device (5,6,7) is six cylinder prisms of elongated shape, or corner prism, the incident end face of optical wand device (5,6,7) is a square or rectangular.
8, optical engine lighting system according to claim 7, it is characterized in that, described solid bar, comprise that orthogonal two principal sections are the cylindricality optical wand of rectangle, or orthogonal two principal sections are trapezoidal taper optical wand, and one of them principal section is that rectangle, another vertical with it principal section are trapezoidal taper optical wand.
9, optical engine lighting system according to claim 7, it is characterized in that, described hollow bar, comprise that two orthogonal principal sections are the cylindricality optical wand of rectangle, and one of them principal section is a rectangle, another vertical with it principal section is trapezoidal taper optical wand, hollow cylindrical optical wand interface and conical hollow optical wand interface plating reflectance coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066601 CN1271445C (en) | 2004-09-23 | 2004-09-23 | Optical engine lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410066601 CN1271445C (en) | 2004-09-23 | 2004-09-23 | Optical engine lighting system |
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| Publication Number | Publication Date |
|---|---|
| CN1588171A CN1588171A (en) | 2005-03-02 |
| CN1271445C true CN1271445C (en) | 2006-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410066601 Expired - Fee Related CN1271445C (en) | 2004-09-23 | 2004-09-23 | Optical engine lighting system |
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| CN (1) | CN1271445C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367075C (en) * | 2005-09-16 | 2008-02-06 | 中国计量学院 | Optical bar uniform light device with light-emitting diode as light source |
| US20100014296A1 (en) * | 2008-07-16 | 2010-01-21 | Chuang Ping Han | Light distribution board having gratings with multiple focuses |
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- 2004-09-23 CN CN 200410066601 patent/CN1271445C/en not_active Expired - Fee Related
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