CN1719332A - Projector - Google Patents

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Publication number
CN1719332A
CN1719332A CN 200510082769 CN200510082769A CN1719332A CN 1719332 A CN1719332 A CN 1719332A CN 200510082769 CN200510082769 CN 200510082769 CN 200510082769 A CN200510082769 A CN 200510082769A CN 1719332 A CN1719332 A CN 1719332A
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CN
China
Prior art keywords
above
mentioned
light
direction
projector
Prior art date
Application number
CN 200510082769
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Chinese (zh)
Inventor
秋山光一
Original Assignee
精工爱普生株式会社
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Priority to JP201884/2004 priority Critical
Priority to JP2004201884 priority
Priority to JP115392/2005 priority
Application filed by 精工爱普生株式会社 filed Critical 精工爱普生株式会社
Publication of CN1719332A publication Critical patent/CN1719332A/en

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Abstract

The invention provides a projector whose optical utilization effect is unable to be reduced greatly even obtaining a smooth and high-quality movable picture display. The invention is characterized in that the invention comprises a first lens array (120) that has a plurality of small lenses (122). In order that the illumination light beam emerging from the liquid crystal device (400R, 400G and 400B) is formed to have a cross section shape such as to illuminate all of an image formation region of the electro-optic modulator in one of vertical and horizontal directions of the image formation region and such as to illuminate part of the image formation region in the other direction, the small lenses of the first lens array have a planar shape compressed in the other direction. The projector can further include a rotary lens (770) between the illumination system and the liquid crystal device which writes frequency synchronous to the picture of the liquid crystal device and scan the illumination beams along the y-axle direction on the image forming area. An auxiliary reflector (116) is designed into a shape with one part of the reflective concave side cut so as to ensure that the length of the light incident side of the first lens array 120 along the longitudinal direction is shorter than that along the transverse direction in the section of the illumination beams.

Description

Projector

Technical field

The present invention relates to projector.

Background technology

Fig. 9 is the figure that is expressed as explanation projector in the past.Fig. 9 (a) is that figure, the Fig. 9 (b) of optical system of the projector before the expression and Fig. 9 (c) are the figure for the problem points that so former projector is described.

In the 900A of this projector, liquid-crystal apparatus 400R, the 400G, the 400B that use as electro-optic modulation arrangement, because be the maintenance display device that the light characteristic shown in Fig. 9 (b) is arranged, different with the situation of the impulse type display device CRT that the light characteristic shown in Fig. 9 (c) is arranged, exist the problem points that can not obtain smooth moving frame demonstration owing to so-called conditions of streaking (about this conditions of streaking, for example, with reference to Non-Patent Document 1.)。

Figure 10 is other the figure of projector that is expressed as before the explanation.Figure 10 (a) is that other figure, Figure 10 (b) and the Figure 10 (c) of optical system of projector before the expression is the figure that is used for the optical shutter of so former projector for expression.

In the 900B of this projector, shown in Figure 10 (a), like that,, and interdict light off and on by these optical shutters at light incident side configuration optical shutter 420R, 420G, the 420B of liquid-crystal apparatus 400R, 400G, 400B, solve the above problems.That is, relax so-called conditions of streaking and obtain the moving frame demonstration of smooth high-quality (for example, with reference to Patent Document 1.)。

[Non-Patent Document 1] " image quality that moving frame shows in the maintenance display " (electronic intelligence Communications Society skill newspaper, EID99-10, the 55th~60 page (1999-06))

[Patent Document 1] spy opens 2002-148712 communique (Fig. 1~Fig. 7)

, in the projector of other before such, exist the reason optical shutter to interdict light off and on, the problem that the light utilization ratio is reduced significantly.

Summary of the invention

The present invention is just in order to solve such problem, even be purpose to provide obtaining the projector that the also little amplitude of light utilization ratio reduces under the smooth high-quality moving frame demonstration situation.

Projector of the present invention, possess, lighting device, it has: penetrate the light supply apparatus of substantially parallel illuminating bundle to illuminated area side, have for the illuminating bundle that penetrates from above-mentioned light supply apparatus being divided into the 1st lens arra of a plurality of lenslets of a plurality of segment beams, has the 2nd lens arra corresponding to a plurality of lenslets of above-mentioned a plurality of lenslets of above-mentioned the 1st lens arra, for being contained in that nonpolarized light from the emitted illuminating bundle of above-mentioned the 2nd lens arra is transformed to the polarization conversion device of polarized light and for making the each several part light beam that penetrates from above-mentioned polarization conversion device overlapping lens at illuminated region overlapping; Electro-optic modulation arrangement is according to the illuminating bundle of image information modulation from above-mentioned lighting device ejaculation; And projection optical system, the illuminating bundle that projection is modulated by above-mentioned electro-optic modulation arrangement; Each lenslet in above-mentioned the 1st lens arra, for the illuminating bundle that penetrates from above-mentioned lighting device is become, the directional lighting entire image that has in the image forming area of above-mentioned electro-optic modulation arrangement the either party among the direction in length and breadth forms the zone, illuminating bundle along the section shape of the part of this image forming area of directional lighting of the opposing party, has the flat shape that direction above-mentioned the opposing party has been compressed, between above-mentioned lighting device and above-mentioned electro-optic modulation arrangement, further possess scanning element: it is synchronized with the scanning direction above-mentioned illuminating bundle of the picture write frequency ground of above-mentioned electro-optic modulation arrangement above-mentioned image forming area above-mentioned the opposing party in upper edge, it is characterized in that, above-mentioned light supply apparatus further possesses: the luminotron that illuminating part is arranged; Reflection is from the ellipsoidal reflector of the light of above-mentioned illuminating part ejaculation; Make the light that reflects by above-mentioned ellipsoidal reflector become the parallelization lens of substantially parallel light and the auxiliary mirror that the light that injects to illuminated area side from above-mentioned illuminating part is reflexed to above-mentioned illuminating part; Above-mentioned auxiliary mirror has the shape of the part of the reflective concave surface of eliminating, and is so that in the section of the illuminating bundle on the light entrance face of above-mentioned the 1st lens arra, shorter than the length along above-mentioned side's direction along the length of above-mentioned the opposing party's direction.

Therefore, according to projector of the present invention, because the picture write frequency that can be synchronized with electro-optic modulation arrangement has the illuminating bundle of following section shape (promptly at the compressed section shape of the opposing party's direction) at image forming area upper edge the opposing party's scanning direction: the integral body of the directional lighting image forming area of the either party in its image forming area among the direction in length and breadth in electro-optic modulation arrangement, part along this image forming area of directional lighting of the opposing party, therefore, rayed zone and the non-irradiation area of light alternately roll in the image forming area of electro-optic modulation arrangement successively.Its result becomes the projector that can relax conditions of streaking, obtain smooth high-quality moving frame demonstration.

In addition, according to projector of the present invention, has illuminating bundle as the above-mentioned compressed section shape of direction along the opposing party, because by realizing as the 1st lens arra at the lens arra that the opposing party's direction is compressed the flat shape of each lenslet, so it is different with situation with optical shutter, can not have the image forming area of leading lavishly toward electro-optic modulation arrangement from the illuminating bundle that light supply apparatus penetrates, the light utilization ratio can not reduce significantly.

Therefore, projector of the present invention even become obtaining the projector that the also little amplitude of light utilization ratio reduces under the smooth high-quality moving frame demonstration situation, can reach purpose of the present invention.

In addition, according to projector of the present invention,, become the little shape of direction of comparing the opposing party with a side direction by the section shape of the illuminating bundle that ellipsoidal reflector reflected.Thereby the size along the opposing party's direction in based on each optical element of the back level of parallelization lens, the 1st lens arra, the 2nd lens arra, polarization conversion device, overlapping lens can shorten, and can seek the miniaturization of device integral body.In addition, by the section shape of the illuminating bundle that ellipsoidal reflector reflected, good with the adaptability that has along the section shape of each lenslet in the 1st lens arra of the opposing party's the compressed shape of direction.

Moreover, as electro-optic modulation arrangement, because the flat shape of its image forming area is extensively used " longitudinal size: the rectangle of lateral dimension=3: 4 " and " longitudinal size: the rectangle of lateral dimension=9: 16 ", so flat shape of conduct each lenslet of the 1st lens arra in projector of the present invention, for example, preferably can be with " longitudinal size: the rectangle of lateral dimension=3: 8 ", " longitudinal size: the rectangle of lateral dimension=9: 32 ", " longitudinal size: the rectangle of lateral dimension=1: 4 " etc.

In projector of the present invention, it is desirable to, under supposition emitted light is not passed through reflectingly by above-mentioned auxiliary mirror from above-mentioned illuminating part situation, above-mentioned ellipsoidal reflector has the shape that has eliminated a part that is used to reflect the above-mentioned needed reflective concave surface of passing through of light.

In projector of the present invention, it is desirable to, a plurality of lenslets of above-mentioned the 1st lens arra, be arranged in the face vertical with the central shaft of above-mentioned illuminating bundle along the length of above-mentioned the opposing party's direction than along in the zone of the short basic rectangle of the length of an above-mentioned side's direction, the shape of the section of the illuminating bundle that penetrates from above-mentioned lighting device, the shape basically identical in the zone of the basic rectangle of arranging with a plurality of lenslets of above-mentioned the 1st lens arra, above-mentioned auxiliary mirror is for there being the shape than length direction on above-mentioned the opposing party's direction.

In projector of the present invention, it is desirable to, above-mentioned ellipsoidal reflector is for there being the shape than length direction on an above-mentioned side's direction.

By such constituting, along with effectively illuminating bundle being incided the zone that is arranged with a plurality of lenslets,, can seek the miniaturization more of device integral body because can shorten along the size of the opposing party's of ellipsoidal reflector direction.

In addition, in projector of the present invention, it is desirable to, in the section of the illuminating bundle on the light entrance face of above-mentioned the 1st lens arra, for the ratio along the length of an above-mentioned side's direction, is 30%~80% along the length of above-mentioned the opposing party's direction.

Under this ratio less than 30% situation, be not easy to keep light utilization ratio, and can not guarantee the line number of lenslet in the 1st lens arra from the emitted illuminating bundle of ellipsoidal reflector, be not easy to make the light intensity distributions on electro-optic modulation arrangement even.On the other hand, surpass under 80% situation, the effect of equipment miniaturization is diminished at this ratio.From these viewpoints, above-mentioned ratio is 40%~70% better.

In addition, in projector of the present invention, it is desirable to, the above-mentioned a plurality of lenslets in above-mentioned the 1st lens arra are arranged as 4 row along an above-mentioned side's direction.

By such constituting because the lenslet in the 1st lens arra is arranged as 4 row along a side direction, so can make light intensity distributions in the illuminated zone of electro-optic modulation arrangement to a certain degree evenly.In addition, because the lenslet in the 1st lens arra is arranged as 4 row along a side direction, be size more than or equal to a certain degree so can make the size of lenslet.Therefore, the lenslet in the 1st lens arra can excessively not shorten along the length of side of the opposing party's direction.Its result from the segment beam that each lenslet of the 1st lens arra penetrates, is got into well by the 2nd corresponding lens arra, can obtain good light utilization ratio.

In addition, in projector of the present invention, it is desirable to, the above-mentioned a plurality of lenslets in above-mentioned the 1st lens arra are arranged as 8 row~10 row along above-mentioned the opposing party's direction.

By such constituting, because the lenslet in the 1st lens arra can excessively not shorten along the length of side of the opposing party's direction, event is got into by the 2nd corresponding lens arra well from the segment beam of each lenslet ejaculation of the 1st lens arra, can obtain good light utilization ratio.

In addition, in projector of the present invention, it is desirable to, above-mentioned the 1st lens arra, compare in the ellipsoidal reflector side with the 2nd focus of above-mentioned ellipsoidal reflector and to have light entrance face, and be configured in from the light quantity of the emitted illuminating bundle of above-mentioned light supply apparatus and spread all over the position that integrally distributes at this light entrance face.

By such constituting, the light quantity of the illuminating bundle that penetrates from light supply apparatus spreads all on the light entrance face that integrally is distributed to the 1st lens arra.Thereby, even form the 1st low lens arra of lens density by lenslet 4 row are arranged, be not reduced in light intensity distributions characteristic in the face on the illuminated zone of electro-optic modulation arrangement yet, can seek the simplification of manufacturing processing of the 1st lens arra and cheapization of cost.

This kind situation it is desirable to, and the position that does not have the excessively little zone (shadow region) of incident intensity in the light entrance face middle body of the 1st lens arra disposes the 1st lens arra.By such constituting, spread all on the incident light district territory that integrally is distributed in the 1st lens arra from the light quantity of the emitted illuminating bundle of light supply apparatus.

In addition, in projector of the present invention, it is desirable to, between above-mentioned lighting device and above-mentioned electro-optic modulation arrangement, further possesses the color separation optical system that is used for be separated into multiple coloured light from the emitted illuminating bundle of above-mentioned lighting device, as above-mentioned electro-optic modulation arrangement, be provided with according to corresponding to the image information of various coloured light a plurality of electro-optic modulation arrangement from the emitted plurality of color optical modulation of above-mentioned color separation optical system.

By such constituting, even can be with obtaining the projector that the also little amplitude of light utilization ratio under the smooth high-quality moving frame demonstration situation reduces, as the panchromatic projector of picture quality excellent (for example 3 is board-like).

In addition, in projector of the present invention, it is desirable to, above-mentioned scanning element, be configured on the position between above-mentioned lighting device and the above-mentioned color separation optical system and the basic conjugation of above-mentioned electro-optic modulation arrangement, comprise the rotating prism with turning axle vertical with lighting optical axis, above-mentioned rotating prism constitutes, by its rotation, the picture write frequency ground that makes rayed zone and the non-irradiation area of light be synchronized with above-mentioned electro-optic modulation arrangement on above-mentioned electro-optic modulation arrangement rolls successively.

By such constituting, the image forming area of each electro-optic modulation arrangement in panchromatic projector can be realized the level and smooth scroll actions of rayed zone and the non-irradiation area of light.

Description of drawings

Fig. 1 is the figure that is expressed as the projector of explanation embodiment 1.

Fig. 2 is the figure that is expressed as the shape of ellipsoidal reflector and auxiliary mirror in the explanation embodiment 1.

Fig. 3 is the figure that is expressed as the structure of 1st lens arra of explanation in embodiment 1.

Fig. 4 is the figure that is illustrated in the light intensity distributions in the section of illuminating bundle with level line.

Fig. 5 is the rotation of expression rotating prism and the figure of the relation between the illumination condition on the liquid-crystal apparatus.

Fig. 6 is the figure for the structure of 1st lens arra of explanation in embodiment 2.

Fig. 7 is the figure that is illustrated in the light intensity distributions in the section of illuminating bundle with level line.

Fig. 8 is the figure of optical system of the projector of expression embodiment 3.

Fig. 9 is the figure that is expressed as explanation projector in the past.

Figure 10 is other the figure of projector that is expressed as before the explanation.

Symbol description

100... lighting device, 110... light supply apparatus, 112... luminotron, 114... ellipsoidal reflector, 116... auxiliary mirror, 118... parallelization lens, 120,120B... the 1st lens arra, 122,122B... lenslet, 124,124B... non-lens area, 130... the 2nd lens arra, 140... polarization conversion device, 150... overlapping lens, 200,200B... color separation optical system, 400R, 400G, 400B... liquid-crystal apparatus, 500... cross colour splitting prism, 600... projection optical system, 770... rotating prism, 772... turning axle, 900A, 900B, 1000,1000C... projector, P... the picture of the imaginary centres point of the 1st lens arra on lighting optical axis, the SCR... screen.

Embodiment

Below, about projector of the present invention, describe based on illustrated embodiment.

Embodiment 1

Fig. 1 is the figure that is expressed as the projector of explanation embodiment 1.Fig. 1 (a) is the figure of optical system of the projector of the embodiment 1 seen from above, and Fig. 1 (b) is the figure of the optical system seen from the side, and Fig. 1 (c) is the figure that is expressed as the lighting device in the projector of explanation embodiment 1.

Moreover, in the following description, with mutually perpendicular 3 directions respectively as z direction of principal axis (in Fig. 1 (a), being the lighting optical axis direction), x direction of principal axis (in Fig. 1 (a) for be parallel to paper and perpendicular to the direction of z axle) and y direction of principal axis (in Fig. 1 (a) for perpendicular to paper and perpendicular to the direction of z axle).

The projector 1000 of embodiment 1 shown in Fig. 1 (a) and Fig. 1 (b), is to possess: lighting device 100; Illuminating bundle from lighting device 100 is separated into the color separation optical system 200 of red, green and blue 3 coloured light; As each 3 liquid-crystal apparatus 400R, 400G, the 400B of electro-optic modulation arrangement in 3 coloured light that separated by color separation optical system 200 according to image information modulation; The cross colour splitting prism 500 that synthesizes the coloured light of being modulated by these 3 liquid-crystal apparatus 400R, 400G, 400B; And by optical projection that cross colour splitting prism 500 synthesized projector to the projection optical system 600 on projecting planes such as screen SC R.

Lighting device 100 shown in Fig. 1 (a) and Fig. 1 (b), has: penetrate the light supply apparatus 110 of substantially parallel illuminating bundle to illuminated area side; Has the 1st lens arra 120 that is used for be divided into a plurality of lenslets 122 (with reference to Fig. 3) of a plurality of segment beams from above-mentioned light supply apparatus 110 emitted illuminating bundles; Has the 2nd lens arra 130 corresponding to a plurality of lenslets 132 (not shown) of a plurality of lenslets 122 of the 1st lens arra 120; Have and be used for that illuminating bundle is transformed to the polarization conversion device 140 of basic a kind of rectilinearly polarized light and be used to make from the overlapping lens 150 of the emitted each several part light beam of this polarization conversion device 140 at illuminated region overlapping.

Light supply apparatus 110 shown in Fig. 1 (a) and Fig. 1 (b), has: ellipsoidal reflector 114; Near the luminotron 112 that the 1st focus of ellipsoidal reflector 114, has luminescent center; Be transformed to the parallelization lens 118 of substantially parallel light by the focused light that ellipsoidal reflector reflected.In luminotron 112, be provided as the auxiliary mirror 116 of the light that injects to illuminated area side from luminotron 112 to the reflector element of ellipsoidal reflector 114 reflections.

It is the illuminating bundle of central shaft that light supply apparatus 110 penetrates with lighting optical axis 100ax.

The 1st lens arra 120 possesses a plurality of lenslets 122 that are arranged in the face vertical with lighting optical axis 100ax, will be divided into a plurality of segment beams corresponding with a plurality of lenslets from light supply apparatus 110 emitted illuminating bundles.

The 2nd lens arra 130 possesses a plurality of lenslets 132 that are arranged in perpendicular in the face of lighting optical axis 100ax.Lenslet 132 corresponds respectively to the segment beam of being cut apart by the 1st lens arra, makes the each several part light beam incide the polarized light parting plane ground optically focused of polarization conversion device 140.

Polarization conversion device 140 possesses: make the 1st polarized light component among 2 kinds of polarized light components that are included in illuminating bundle the direct transmission of illuminating bundle and with the illuminating bundle of the 2nd polarized light component to polarized light parting plane perpendicular to the direction reflection of lighting optical axis 100ax; With the reflecting surface of the 2nd polarized light component to the direction reflection that is parallel to lighting optical axis; And the polarizer that the side among the 1st polarized light component and the 2nd polarized light component is transformed to the opposing party.Be transformed to basic a kind of rectilinearly polarized light from the 2nd lens arra 130 emitted segment beams by polarization conversion device 140.Therefore, because illuminating bundle is transformed to the polarized light of polarizing axis by the interaction energy of this polarization conversion device 140 with a side, so liquid-crystal apparatus 400R, the 400G of the projector 1000 in embodiment 1, the 400B, under the electro-optic modulation arrangement situation that adopts such type of utilizing polarized light such as liquid-crystal apparatus as electro-optic modulation arrangement, become the illuminating bundle of this situation of being fit to.

Overlapping lens 150, be make from polarization conversion device 140 emitted a plurality of segment beams overlap onto the turning axle 772 that comprises rotating prism 770 perpendicular near the optical element in the face of lighting optical axis 100ax.

Rotating prism 770, by with turning axle 772 serving as the axle rotation, near the pass through position perpendicular to the face of lighting optical axis 100ax in of illuminating bundle turning axle 772 of institute's incident moved, thus, on the image forming area of liquid-crystal apparatus 400R, 400G, 400B, rolled in field of illumination and non-field of illumination.

Moreover, specify aftermentioned about the ellipsoidal reflector 114 of light supply apparatus 110 and auxiliary mirror the 116, the 1st lens arra 120 and rotating prism 770.

Incide color separation optical system 200 from rotating prism 770 emitted illuminating bundles.

As color separation optical system 200, shown in Fig. 1 (a) and Fig. 1 (b), adopt from lighting device 100 up to the optical path length of liquid-crystal apparatus 400R, 400G, 400B equate etc. the light path optical system.

Color separation optical system 200 shown in Fig. 1 (a), has: dichronic mirror 720,724; Catoptron 722,726,728,730,732; Relay lens 752,736,756; With field lens 758,760,762.

Relay lens 752,736,756 is to make the optical element that is imaged onto the image forming area of liquid-crystal apparatus 400R, 400G, 400B from rotating prism 770 emitted illuminating bundles.Field lens 758,760,762, for the each several part optical beam transformation for the substantially parallel light beam of each chief ray is provided with.

Dichronic mirror 720 makes red light composition and the transmission of green light composition from the emitted light of rotating prism 770, and the reflection blue light component.By the blue light composition that dichronic mirror 720 is reflected, mirror 728,730,732 reflections that are reflected arrive the liquid-crystal apparatus 400B that blue light is used.On the other hand, red light composition behind the transmission dichronic mirror 720 and green light composition are reflected mirror 722 reflection and incide dichronic mirror 724.In dichronic mirror 724, transmits red light component, reflection green light component.Red light composition in dichronic mirror 724 after the transmission, mirror 726 reflections that are reflected arrive the liquid-crystal apparatus 400R that red light is used.In addition, by the green light composition that dichronic mirror 724 is reflected, mirror 728 reflections that further are reflected arrive the liquid-crystal apparatus 400G that green light is used.

Liquid-crystal apparatus 400R, 400G, 400B form each image of each coloured light according to the image information modulated illumination, be the lighting object of lighting device 100.Moreover, though omitted diagram, between field lens 244,246,248 and each liquid-crystal apparatus 400R, 400G, 400B, dispose the light incident side polarization plates respectively mediately, between each liquid-crystal apparatus 400R, 400G, 400B and cross colour splitting prism 500, dispose the emitting side polarization plates respectively mediately.By these light incident side polarization plates, liquid-crystal apparatus 400R, 400G, 400B and emitting side polarization plates each coloured light of incident is carried out optical modulation.

Liquid-crystal apparatus 400R, 400G, 400B, the airtight inclosure is the liquid crystal of electro-optical substance in a pair of transparent glass substrate, for example, with multi-crystal TFT as on-off element, according to the picture signal that is provided, modulation is from the polarization direction of a kind of emitted rectilinearly polarized light of light incident side polarization plates.

As liquid-crystal apparatus 400R, 400G, 400B, adopt and to have the wide demonstration (widevision) of the flat shape of " along the axial longitudinal size of y: along the rectangle of the axial lateral dimension of x=9: 16 " to use liquid-crystal apparatus.

Cross colour splitting prism 500 is synthetic optical images that form from emitted each modulation by each coloured light of emitting side polarization plates, and forms the optical element of coloured image.This cross colour splitting prism 500 is the plane that is bonded with 4 right-angle prisms and sees basic square shape, at the interface that is bonded with right-angle prism basic X word shape to each other, forms the dielectric multilayer film.Formed dielectric multilayer film on a side's of basic X word shape interface, reflection red light; Formed dielectric multilayer film on the opposing party's interface, reflect blue light.Make the bending of red light and blue light by these dielectric multilayer films, make the direct of travel of itself and green light consistent, synthesize 3 kinds of coloured light thus.

Coloured image from cross colour splitting prism 500 penetrates by projection optical system 600 enlarging projections, forms big picture image on screen SC R.

Below, ellipsoidal reflector 114, auxiliary mirror 116, the 1 lens arras 120 and rotating prism 770 in the projector 1000 of detailed description embodiment 1.

1. the 1st lens arra

Fig. 3 (a)~Fig. 3 (c) is the figure of structure that is used for representing the 1st lens arra 120 of embodiment 1.Fig. 3 (a) is from seeing the figure of the 1st lens arra 120 along the z direction of principal axis, and Fig. 3 (b) is the figure that sees from along the y direction of principal axis, and Fig. 3 (c) is the figure that sees from along the x direction of principal axis.Fig. 4 (a)~Fig. 4 (b) is the figure that represents the light intensity distributions in the section of illuminating bundle with level line.Fig. 4 (a) is the figure that is illustrated in the light intensity distributions of the illuminating bundle in the light entrance face of the 1st lens arra 120.Fig. 4 (b) is the figure that is illustrated in the light intensity distributions of the illuminating bundle on the image forming area of liquid-crystal apparatus 400R (in 400G and 400B too).

The 1st lens arra 120 as shown in Figure 3, has: be used for a plurality of lenslets 122 that are divided into a plurality of segment beams from the emitted illuminating bundle of light supply apparatus 110 (with reference to Fig. 1); With the non-lens area 124 of surrounding the setting of a plurality of lenslets 122 ground.

Each lenslet 122 in the 1st lens arra 120 shown in Fig. 3 (a), has the flat shape of " along the axial longitudinal size of y: along the rectangle of the axial lateral dimension of x=1: 4 ".Therefore, the 1st lens arra 120, can make from the emitted illuminating bundle of lighting device 100, be out of shape a plurality of segment beams that are shaped as of light beam, above-mentioned a plurality of segment beam has following section shape: in the image forming area of each liquid-crystal apparatus 400R, 400G, 400B for form along the axial horizontal direction illumination image of x the zone integral body, for the part (making an appointment with half) of this image forming area that throws light on along the axial longitudinal direction of y.That is, the flat shape of each lenslet 122 of the 1st lens arra 120, the shape of setting the field of illumination in the image forming area with each liquid-crystal apparatus 400R, 400G, 400B for becomes basic similar figures.

Then, overlapping from a plurality of segment beams that the 1st lens arra 120 penetrates by means of the 2nd lens arra 130 and overlapping lens 150, the zone of illumination " along the axial longitudinal size of y: along the rectangle of the axial lateral dimension of x=1: 4 ".

Detailed description is about the arrangement of a plurality of lenslets 122.

For the field of illumination of throwing light on more equably, it is desirable to, the illuminating bundle from light supply apparatus 100 is divided into more a plurality of segment beams and overlaps onto the field of illumination.But, because must guarantee the spacing of light source picture, make the formed light source picture of cutting apart by each lenslet 122 of the 1st lens arra 120 of segment beam not overlapping on the 2nd lens arra 130, the number that therefore will limit the light source picture makes the size of the later optical system of the 2nd lens arra 130 can be not excessive, that is the number of restriction lenslet 122.If light source as overlapping, then causes in the lenslet of the 2nd lens arra 130 that corresponds respectively to the segment beam of being cut apart by the 1st lens arra, not corresponding segment beam incident, this not corresponding segment beam can not be overlapping effectively in the field of illumination.

The lenslet 122 that has the flat shape of " the axial longitudinal size along y: the rectangle of the axial lateral dimension along x=1: 4 " making serves as row with the x direction of principal axis and serves as under the row situation of arranging with the y direction of principal axis, spacing according to the formed light source picture of cutting apart with lenslet 122 corresponding numbers of segment beam, compare with column direction, line direction narrows down.

In the projector 1000 of embodiment 1, a plurality of lenslets 122 in the 1st lens arra 120 as shown in Figure 3, are arranged in 4 row along the x direction of principal axis.Therefore because can fully guarantee the number of a plurality of segment beams, so shown in Fig. 4 (b), can make in the illuminated zone of liquid-crystal apparatus 400R, 400G, 400B light intensity distributions evenly to a certain degree.In addition, because a plurality of lenslets 122 in the 1st lens arra 120 are arranged in 4 row along the x direction of principal axis, so can guarantee the size of lenslet 122, the feasible segment beam that penetrates from each lenslet 122 of the 1st lens arra 120 is got into well by the 2nd corresponding lens arra 130.Therefore, from the light of the illumination field of illumination of the emitted light of light supply apparatus 110, can obtain good light utilization ratio about relatively.

In the projector 1000 of embodiment 1, a plurality of lenslets 122 in the 1st lens arra 120 as shown in Figure 3, are arranged in 10 row along the y direction of principal axis.Therefore, can guarantee the size of lenslet 122, the feasible segment beam that penetrates from each lenslet 122 of the 1st lens arra 120 is got into well by the 2nd corresponding lens arra 130.About with respect to light, can obtain good light utilization ratio from the illumination field of illumination of the emitted light of light supply apparatus 110.

In the projector 1000 of embodiment 1, relatively along the ratio along the axial longitudinal length of y of the axial lateral length of x, shown in Fig. 4 (a), at lateral length: a plurality of lenslets 122 in longitudinal length=8: 5 zone in arrangement the 1st lens arra 120.That is, in the zone that relatively is about 63% rectangle, arrange a plurality of lenslets 122 along the ratio along the axial longitudinal length of y of the axial lateral length of x.

Therefore, by make relatively along the axial lateral length of x along the ratio of the axial longitudinal length of y more than or equal to 30%, can keep from the light utilization ratio of the emitted illuminating bundle of ellipsoidal reflector 114.

According to present embodiment, owing to can guarantee the size of lenslet 122, and can guarantee the line number of the lenslet 122 in the 1st lens arra 120 and columns and be divided into a plurality of segment beams, the feasible segment beam that penetrates from each lenslet 122 of the 1st lens arra 120, got well into by the 2nd corresponding lens arra 130, therefore can make the light intensity distributions on liquid-crystal apparatus 400R, 400G, 400B even.In addition, be smaller or equal to 80% by making relative ratio along the axial longitudinal length of y along the axial lateral length of x, can make equipment miniaturization.

In the projector 1000 of embodiment 1, the 1st lens arra 120, compare in ellipsoidal reflector 114 sides with the 2nd focus of ellipsoidal reflector 114 and to have light entrance face, be configured in from the light quantity of the emitted illuminating bundle of light supply apparatus 110 and spread all over the position that integrally distributes at this light entrance face.Therefore, on the light entrance face of the 1st lens arra 120, spread all over integrally and distribute from the light quantity of the emitted illuminating bundle of light supply apparatus 110.Thereby, even form by making lenslet 122 be arranged in the 1st low lens arra 120 of lens density that 4 row form, also can not be reduced in the face on the illuminated zone of liquid-crystal apparatus 400R, 400G, 400B light intensity distributions idiocratically, realize the simplification of manufacturing processing of the 1st lens arra 120 and cheapization of cost.

In the case, it is desirable to, on the light entrance face middle body of the 1st lens arra 120, do not have position configuration the 1st lens arra 120 in the excessively little zone (shadow region of luminotron) of incident intensity.By such constituting, spread all on the incident light district territory that integrally is distributed in the 1st lens arra 120 from the light quantity of the emitted illuminating bundle of light supply apparatus 110.

2. ellipsoidal reflector and auxiliary mirror

Fig. 2 is to be expressed as the ellipsoidal reflector 114 of explanation in embodiment 1 and the figure of the shape of auxiliary mirror 116.Fig. 2 (a) is a planimetric map, and Fig. 2 (b) is an outboard profile, and Fig. 2 (c) is the figure that sees from illuminated area side, and Fig. 2 (d) is a stereographic map.

Luminotron 112 is made of illuminating part with luminescent center and a pair of sealing that extends from the two ends of this illuminating part.

Ellipsoidal reflector 114 has the reflective concave surface that is made of the ellipse of revolution face with the 1st focus and the 2nd focus.So that the mode of the luminescent center basically identical of the 1st focus of ellipsoidal reflector 114 and luminotron 112, on a side's of luminotron 112 sealing, ellipsoidal reflector 114 is installed.Ellipsoidal reflector 114 reflections make its 2nd focus optically focused to ellipsoidal reflector 114 from the emitted light of the illuminating part of luminotron 112.

Auxiliary mirror 116 has the reflective concave surface that is made of spherical shape.So that the mode of the luminescent center basically identical of the center of curvature of auxiliary mirror 116 and luminotron 112, on the opposing party's of luminotron 112 sealing, auxiliary mirror 116 is installed.Auxiliary mirror 116 will reflect to ellipsoidal reflector 114 from the emitted light that injects to illuminated area side (with ellipsoidal reflector 114 opposition sides) of the illuminating part of luminotron 112.In other words, to reflex to the illuminating part of luminotron 112 from the illuminating part of luminotron 112 to the light of illuminated area side ejaculation by auxiliary mirror 116, the light that is reflected by auxiliary mirror 116, Jie is by luminotron 112 directive ellipsoidal reflector 114, by the 2nd focus optically focused of ellipsoidal reflector 114 to ellipsoidal reflector 114.

Auxiliary mirror 116 as Fig. 1 and shown in Figure 2, has the shape of the part of the reflective concave surface of eliminating, make in the section of the illuminating bundle on the light entrance face of the 1st lens arra 120, along the axial length of y than short along the axial length of x.

Promptly, lenslet 122 when " along the axial longitudinal size of y: along the rectangle of the axial lateral dimension of x=1: 4 ", be arranged in perpendicular to as the lateral length that is in the face of the illuminating bundle 100ax of the central shaft of illuminating bundle: under the situation in the rectangular area of longitudinal length=8: 5, auxiliary mirror 116 is vertically having than length direction.Thus, auxiliary mirror 116 plays a part vertically compressing illuminating bundle.

Thereby, the section shape of the illuminating bundle that is reflected by ellipsoidal reflector 114, for laterally compare along x is axial, along the axial vertically little shape of y.

Therefore, the section shape of the illuminating bundle that is reflected by ellipsoidal reflector 114, what be suitable for very that each lenslet 122 is arranged in the 1st lens arra 120 is lateral length: the rectangular area of longitudinal length=8: 5, can there be the light that utilizes lavishly from light supply apparatus 100 ejaculations.

In addition, with parallelization lens 118, the 1 lens arras 120, the 2 lens arras 130, polarization conversion device 140, overlapping lens 150 are can the shortening along the axial longitudinal size of y of each optical element of main back level, can seek the miniaturization of device integral body.

Further, in the projector 1000 of embodiment 1, ellipsoidal reflector 114, as Fig. 1 and shown in Figure 2, situation that auxiliary mirror 116 passes through is reflectingly can't help in supposition from luminotron 112 emitted light under, have and eliminated the shape that partly is used to reflect the needed reflective concave surface of passing through of light.In other words, under the axial situation about vertically having than the shape of length direction along y, ellipsoidal reflector 114 is for along the axial shape that laterally has than length direction of x at auxiliary mirror 116.Therefore, because can shorten ellipsoidal reflector 114 along the axial longitudinal size of y, so can seek the further miniaturization of device integral body.

3. rotating prism

Fig. 5 (a)~Fig. 5 (c) is the rotation of expression rotating prism 770 and the figure of the relation between the illumination condition on the liquid-crystal apparatus 400R (400G and 400B are too).Fig. 5 (a) is the figure when turning axle 772 is seen rotating prism 770.Fig. 5 (b) is the figure when lighting optical axis 100ax sees rotating prism 770.Fig. 5 (c) is the figure that is illustrated in the irradiating state of the illuminating bundle on the liquid-crystal apparatus 400R image forming area of (400G and 400B are too).

Shown in Fig. 5 (a) and Fig. 5 (b), expression, overlapping on lighting optical axis 100ax has the picture P of imaginary centres point of field of illumination of the segment beam that penetrates from the 1st lens arra 120 along with the rotation of rotating prism 770, with the turning axle 772 of rotating prism 770 be the center with the vertical substantially direction (above-below direction) of turning axle 772 on the situation of rolling.Its result, shown in Fig. 5 (c), rotating prism 770 1 rotations, the non-irradiation area of rayed zone and light just rolls successively alternately in the image forming area of liquid-crystal apparatus 400R, 400G, 400B.

More than, though describe in detail about the ellipsoidal reflector 114 in the projector 1000 of embodiment 1, auxiliary mirror 116, the 1 lens arras 120 and rotating prism 770 also have following feature in the projector 1000 of embodiment 1.

In the projector 1000 of embodiment 1, between lighting device 100 and liquid-crystal apparatus 400R, 400G, 400B, further possesses the color separation optical system 200 that is used for the illuminating bundle that penetrates from lighting device 100 is separated into multiple coloured light, a plurality of liquid-crystal apparatus 400R, 400G, 400B are set: as liquid-crystal apparatus, according to corresponding to the image information modulation of separately coloured light from the emitted multiple coloured light of color separation optical system 200.Therefore, even can obtain the projector that the also little amplitude of light utilization ratio under the smooth high-quality moving frame demonstration situation reduces, as 3 excellent board-like panchromatic projectors of picture quality.

In the projector 1000 of embodiment 1,, form antireflecting film in the light-transmissive surface of rotating prism 770.Therefore,, the reduction of light utilization ratio can be suppressed to minimum, and can lower stray light level and improve contrast because light transmission improves in rotating prism 770.

Therefore, projector 1000 according to embodiment 1, because can will have at liquid-crystal apparatus 400R, 400G, in the image forming area of 400B in length and breadth among the direction, integral body along the axial transverse illumination image forming area of x, illuminating bundle along the section shape (promptly at vertical compressed section shape) of the part of axial this image forming area of longitudinal illumination of y, be synchronized with liquid-crystal apparatus 400R, 400G, the picture write frequency of 400B is in the scanning of image forming area upper edge y direction of principal axis, therefore at liquid-crystal apparatus 400R, 400G, rayed zone and the non-irradiation area of light just alternately roll successively in the image forming area of 400B.Its result becomes the projector that can relax conditions of streaking, obtain smooth high-quality moving frame demonstration.

In addition,, has above-mentioned illuminating bundle, because pass through each lenslet 122 (with reference to Fig. 3 at vertical compressed section shape according to the projector 1000 of embodiment 1.) flat shape at the lens arra that has vertically compressed as the 1st lens arra 120 and realize, so it is different with situation with optical shutter, the illuminating bundle that penetrates from light supply apparatus 110 can not have the image forming area of leading liquid-crystal apparatus 400R, 400G, 400B lavishly, and the light utilization ratio can not reduce significantly.

Therefore, the projector 1000 of embodiment 1 is obtaining the projector that the also little amplitude of light utilization ratio reduces under the smooth high-quality moving frame demonstration situation even become.

Embodiment 2

Fig. 6 is the figure that is expressed as the structure of the 1st lens arra in the explanation embodiment 2.Fig. 6 (a) is the figure that sees the 1st lens arra along the z direction of principal axis, and Fig. 6 (b) is the figure that sees along the y direction of principal axis, and Fig. 6 (c) is the figure that sees along the x direction of principal axis.Fig. 7 is the figure that is illustrated in light intensity distributions in the section of illuminating bundle with level line.Fig. 7 (a) is the figure that is illustrated in the light intensity distributions of illuminating bundle in the light entrance face of the 1st lens arra.Fig. 7 (b) is the figure that is illustrated in the light intensity distributions of illuminating bundle on the image forming area of liquid-crystal apparatus.

The 1000B of projector of embodiment 2 (does not illustrate.), the situation of the projector 1000 of formation of the 1st lens arra (and formation of following its 2nd lens arra) and embodiment 1 is different.Promptly, in the projector 1000 of embodiment 1, the 1st lens arra 120, as shown in Figure 3, have to be arranged in 4 row, the lenslet 122 of 10 row and the non-lens area 124 of being arranged to surround these lenslets 122, relative therewith, in the 1000B of projector of embodiment 2, the 1st lens arra 120B as shown in Figure 6, has to be arranged in 4 row, the lenslet 122B of 8 row and the non-lens area 124B that is arranged to surround these lenslets 122B.

Moreover each the lenslet 122B in the 1st lens arra 120B shown in Fig. 6 (a), has the flat shape of " along the axial longitudinal size of y: along the rectangle of the axial lateral dimension of x=1: 4 ".Therefore, the 1st lens arra 120B can be (not illustrating from lighting device 100.) illuminating bundle that penetrates, form the illuminating bundle of following section shape: to each liquid-crystal apparatus 400R, 400G, 400B (diagram not.) image forming area in the integral body along the axial transverse illumination image forming area of x, to a part (making an appointment with half) along axial this image forming area of longitudinal illumination of y.

In addition, in the 1000B of projector of embodiment 2, in the section of the illuminating bundle on the light entrance face of the 1st lens arra 120B, relative ratio along the axial longitudinal length of y along the axial lateral length of x, shown in Fig. 7 (a), be lateral length: longitudinal length=2: 1.That is, the relative ratio along the axial longitudinal length of y along the axial lateral length of x is 50%.

Like this, the 1000B of projector of embodiment 2, though the situation of the projector 1000 of formation of the 1st lens arra (and formation of following its 2nd lens arra) and embodiment 1 is different, but it is identical with the situation of the projector 1000 of embodiment 1, because can will have at liquid-crystal apparatus 400R, 400G, in the image forming area of 400B in length and breadth among the direction, to integral body along the axial transverse illumination image forming area of x, to illuminating bundle along the section shape of the part of axial this image forming area of longitudinal illumination of y (i.e. the section shape that vertically is being compressed), be synchronized with liquid-crystal apparatus 400R, 400G, the picture write frequency of 400B is in the scanning of image forming area upper edge y direction of principal axis, so at liquid-crystal apparatus 400R, 400G, rayed zone and the non-irradiation area of light just alternately roll successively in the image forming area of 400B.Its result becomes the projector that can relax conditions of streaking, obtain smooth high-quality moving frame demonstration.

In addition, the 1000B of projector according to embodiment 2, owing to have above-mentioned illuminating bundle at the section shape that vertically has been compressed, by the flat shape of each lenslet 122B is realized as the 1st lens arra 120B at the lens arra that has vertically compressed, so it is different with situation with optical shutter, can not have the image forming area of leading liquid-crystal apparatus 400R, 400G, 400B lavishly from light supply apparatus 110 emitted illuminating bundles, the light utilization ratio can not reduce significantly.

Therefore, the 1000B of projector of embodiment 2 can obtain the projector that the also little amplitude of light utilization ratio reduces under the smooth high-quality moving frame demonstration situation even become.

Embodiment 3

Fig. 8 is the figure of optical system of the projector of expression embodiment 3.Fig. 8 (a) is the figure that sees optical system from above, and Fig. 8 (b) is the figure that sees optical system from the side.

The 1000C of projector of embodiment 3, shown in Fig. 8 (a) and projector's 1000 ratios of embodiment 1, the formation difference of color separation optical system.

That is, among the 1000C of projector of embodiment 3,, all be same direction in order to make the direction of rolling at the non-irradiation area of each liquid-crystal apparatus 400R, 400G, 400B glazing irradiation area and light as color separation optical system 200B, adopt two relay optical systems.

Like this, the 1000C of projector of embodiment 3, though and the projector 1000 of embodiment 1 compares, the formation difference of color separation optical system, but it is identical with the situation of the projector 1000 of embodiment 1, because will have at liquid-crystal apparatus 400R, 400G, in the image forming area of 400B in length and breadth among the direction, to integral body along the axial transverse illumination image forming area of x, to illuminating bundle along the section shape of the part of axial this image forming area of longitudinal illumination of y (i.e. the section shape that vertically is being compressed), be synchronized with liquid-crystal apparatus 400R, 400G, the picture write frequency ground of 400B is in the scanning of image forming area upper edge y direction of principal axis, so at liquid-crystal apparatus 400R, 400G, rayed zone and the non-irradiation area of light just can replace rolling successively in the image forming area of 400B.Its result becomes the projector that can relax conditions of streaking, obtain smooth high-quality moving frame demonstration.

In addition, the 1000C of projector according to embodiment 3, owing to have above-mentioned illuminating bundle at the section shape that vertically has been compressed, by adopting the flat shape of each lenslet 122 is realized as the 1st lens arra 120 at the lens arra that has vertically compressed, so it is different with situation with optical shutter, the illuminating bundle that penetrates from light supply apparatus 110 can not have the image forming area of leading liquid-crystal apparatus 400R, 400G, 400B lavishly, and the light utilization ratio can not reduce significantly.

Therefore, the 1000C of projector of embodiment 3 is obtaining the projector that the also little amplitude of light utilization ratio reduces under the smooth high-quality moving frame demonstration situation even become.

More than, though projector of the present invention has been described, the invention is not restricted to the respective embodiments described above based on the respective embodiments described above, in the scope that does not exceed its main idea, can in various forms, implement, for example also can followingly be out of shape.

(1) though the 1000~1000C of projector of the respective embodiments described above is transmission-type projectors, the present invention also goes for reflection-type projector.At this, so-called " transmission-type ", refer to liquid crystal indicator as transmission-type etc., electro-optic modulation arrangement as light-modulating cell is to make light transmissive type, so-called " reflection-type ", referring to as the reflective liquid crystal device, is the type of light reflection as the electro-optic modulation arrangement of light-modulating cell.Under the situation of the projector that this invention is used for reflection-type, also can obtain the effect identical with the projector of transmission-type.

(2) 1000~1000C of projector of the respective embodiments described above though used liquid-crystal apparatus as electro-optic modulation arrangement, the invention is not restricted to this.As electro-optic modulation arrangement, usually, so long as just, also can utilize the micro mirror type optic modulating device according to the image information modulating the incident light.As the micro mirror type optic modulating device, for example, can use DMD (Digital Micromirror Device) (trade mark of TI company).

(3) 1000~1000C of projector of the respective embodiments described above, as each lenslet 122 of the 1st lens arra 120,120B, the flat shape of 122B, though used " longitudinal size: the rectangle of lateral dimension=1: 4 ", but the invention is not restricted to this, for example, also can preferably use " longitudinal size: the rectangle of lateral dimension=9: 32 " or " longitudinal size: the rectangle of lateral dimension=3: 8 " etc.

(4) 1000~1000C of projector of the respective embodiments described above as scanning element, though used rotating prism 770, the invention is not restricted to this, for example, also can use current mirror (galvano-mirror), polygonal mirror (polygon mirror) etc.

(5) 1000~1000C of projector of the respective embodiments described above as light supply apparatus 110, has ellipsoidal reflector 114 though adopted; Near the luminotron 112 that the 1st focus of ellipsoidal reflector 114, has luminescent center; With the light supply apparatus of parallelization lens 118, but the invention is not restricted to this, for example, also can be with having paraboloid and near the focus of paraboloid, having the light supply apparatus of the luminotron of luminescent center.

(6) in the respective embodiments described above, though only for the example of the projector of 3 liquid-crystal apparatus 400R, 400G, 400B, the present invention also can be applicable to and use less than 3, perhaps, and more than the projector that equals 4 liquid-crystal apparatus.

(7) in the respective embodiments described above, though only for carrying out the example of the front projection type projector of image projection from the direction of watching screen, the present invention also can be applicable to from carrying out the back projecting projector of image projection with the direction opposition side of watching screen.

Claims (10)

1. projector, it possesses:
Lighting device has: penetrate the light supply apparatus of substantially parallel illuminating bundle to illuminated area side, has the 1st lens arra that is used for be divided into a plurality of lenslets of a plurality of segment beams from the emitted illuminating bundle of above-mentioned light supply apparatus, has the 2nd lens arra corresponding to a plurality of lenslets of above-mentioned a plurality of lenslets of above-mentioned the 1st lens arra, be used for being transformed to the polarization conversion device of polarized light and being used to make from the overlapping lens of the emitted each several part light beam of above-mentioned polarization conversion device at illuminated region overlapping being contained in from the nonpolarized light of the emitted illuminating bundle of above-mentioned the 2nd lens arra;
Electro-optic modulation arrangement is modulated from the emitted illuminating bundle of above-mentioned lighting device according to image information; With
Projection optical system, the illuminating bundle that projection is modulated by above-mentioned electro-optic modulation arrangement;
Each lenslet in above-mentioned the 1st lens arra, become for making from the emitted illuminating bundle of above-mentioned lighting device, have the integral body of the directional lighting image forming area of the either party among the direction in length and breadth in the image forming area of above-mentioned electro-optic modulation arrangement, along the illuminating bundle of the section shape of the part of this image forming area of directional lighting of the opposing party, has the flat shape that direction above-mentioned the opposing party has been compressed
Between above-mentioned lighting device and above-mentioned electro-optic modulation arrangement, also possess, be synchronized with the scanning element of the picture write frequency ground of above-mentioned electro-optic modulation arrangement at above-mentioned image forming area above-mentioned the opposing party's in upper edge the above-mentioned illuminating bundle of scanning direction,
It is characterized in that,
Above-mentioned light supply apparatus also possesses: the luminotron with illuminating part; Reflection is from the ellipsoidal reflector of the emitted light of above-mentioned illuminating part; Make the light that reflects by above-mentioned ellipsoidal reflector become the parallelization lens of substantially parallel light; And the auxiliary mirror that the light that injects to illuminated area side from above-mentioned illuminating part is reflexed to above-mentioned illuminating part;
Above-mentioned auxiliary mirror has the shape of a part that has eliminated reflective concave surface, and is so that in the section of the illuminating bundle on the light entrance face of above-mentioned the 1st lens arra, shorter than the length along an above-mentioned side's direction along the length of above-mentioned the opposing party's direction.
2. projector as claimed in claim 1, it is characterized in that, above-mentioned ellipsoidal reflector has and has eliminated, and is used to reflect the shape of the part of the above-mentioned needed reflective concave surface of passing through of light under the supposition situation that emitted light is not passed through reflectingly by above-mentioned auxiliary mirror from above-mentioned illuminating part.
3. projector as claimed in claim 1 or 2, it is characterized in that, a plurality of lenslets of above-mentioned the 1st lens arra, be arranged in the face vertical with the central shaft of above-mentioned illuminating bundle along the length of above-mentioned the opposing party's direction than along in the zone of the short essentially rectangular of the length of an above-mentioned side's direction
From the shape of the section of the emitted illuminating bundle of above-mentioned lighting device be arranged with the shape basically identical in zone of essentially rectangular of a plurality of lenslets of above-mentioned the 1st lens arra,
Above-mentioned auxiliary mirror is for having the shape than length direction on above-mentioned the opposing party's direction.
4. projector as claimed in claim 3 is characterized in that, above-mentioned ellipsoidal reflector is for having the shape than length direction on an above-mentioned side's direction.
5. as any one described projector in the claim 1 to 4, it is characterized in that, in the section of the illuminating bundle on the light entrance face of above-mentioned the 1st lens arra, for ratio, be 30%~80% along the length of an above-mentioned side's direction along the length of above-mentioned the opposing party's direction.
6. as any one described projector in the claim 1 to 5, it is characterized in that the above-mentioned a plurality of lenslets in above-mentioned the 1st lens arra are arranged as 4 row along an above-mentioned side's direction.
7. as any one described projector in the claim 1 to 4, it is characterized in that the above-mentioned a plurality of lenslets in above-mentioned the 1st lens arra are arranged as 8 row~10 row along above-mentioned the opposing party's direction.
8. as any one described projector in the claim 1 to 5, it is characterized in that, above-mentioned the 1st lens arra, compare in the ellipsoidal reflector side with the 2nd focus of above-mentioned ellipsoidal reflector and to have light entrance face, be configured in from the light quantity of the emitted illuminating bundle of above-mentioned light supply apparatus and spread all over the position that integrally distributes at this light entrance face.
9. as any one described projector in the claim 1 to 8, it is characterized in that, between above-mentioned lighting device and above-mentioned electro-optic modulation arrangement, further possesses the color separation optical system that is used for be separated into multiple coloured light from the emitted illuminating bundle of above-mentioned lighting device
As above-mentioned electro-optic modulation arrangement, be provided with according to a plurality of electro-optic modulation arrangement of image information to modulating from the emitted multiple coloured light of above-mentioned color separation optical system corresponding to various coloured light.
10. projector as claimed in claim 9, it is characterized in that above-mentioned scanning element is configured on the position between above-mentioned lighting device and the above-mentioned color separation optical system and the basic conjugation of above-mentioned electro-optic modulation arrangement, comprise rotating prism with turning axle vertical with lighting optical axis
Above-mentioned rotating prism constitutes, and by its rotation, the picture write frequency ground that makes rayed zone and the non-irradiation area of light be synchronized with above-mentioned electro-optic modulation arrangement on above-mentioned electro-optic modulation arrangement rolls successively.
CN 200510082769 2004-07-08 2005-07-07 Projector CN1719332A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP201884/2004 2004-07-08
JP2004201884 2004-07-08
JP115392/2005 2005-04-13

Publications (1)

Publication Number Publication Date
CN1719332A true CN1719332A (en) 2006-01-11

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CN 200510082769 CN1719332A (en) 2004-07-08 2005-07-07 Projector

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101859052A (en) * 2009-04-01 2010-10-13 精工爱普生株式会社 Projector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101859052A (en) * 2009-04-01 2010-10-13 精工爱普生株式会社 Projector

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