CN101191988B - Projector - Google Patents

Projector Download PDF

Info

Publication number
CN101191988B
CN101191988B CN200710196008XA CN200710196008A CN101191988B CN 101191988 B CN101191988 B CN 101191988B CN 200710196008X A CN200710196008X A CN 200710196008XA CN 200710196008 A CN200710196008 A CN 200710196008A CN 101191988 B CN101191988 B CN 101191988B
Authority
CN
China
Prior art keywords
light
above
mentioned
projector
projection engine
Prior art date
Application number
CN200710196008XA
Other languages
Chinese (zh)
Other versions
CN101191988A (en
Inventor
守国荣时
Original Assignee
精工爱普生株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2006319740 priority Critical
Priority to JP319740/2006 priority
Priority to JP246672/2007 priority
Priority to JP2007246672A priority patent/JP5239279B2/en
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 CN101191988A publication Critical patent/CN101191988A/en
Application granted granted Critical
Publication of CN101191988B publication Critical patent/CN101191988B/en

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/28Reflectors in projection beam
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/145Housing details, e.g. position adjustments thereof
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2006Lamp housings characterised by the light source
    • G03B21/2033LED or laser light sources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3129Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/315Modulator illumination systems
    • H04N9/3161Modulator illumination systems using laser light sources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3197Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves

Abstract

The invention provides a projector which can adjust picture size easily when processing approximate projection. The projector includes a projection engine section (11) for projecting light corresponding to image signals onto the projected screen (16), and a housing (15) for housing the projection engine section (11). The projection engine section (11) is capable of moving in the housing (15) in a direction along a light path and processes a wide-anglization reflection region, namely an aspherical mirror (14) which can wide-anglize light from the projection lens by aid of reflection. The projection lens and the aspherical mirror are disposed with a substantially identical light axis.

Description

Projector

Technical field

The present invention relates to the technology of projector, particularly relate to the technology that to carry out from the near position projected light of distance plane of illumination near the projector of projection.

Background technology

Popularized the most of front projection formula projector that comes in the past, and, all will be configured in and leave on the position of a distance from screen in order to ensure projector distance.Projector is being configured under the locational situation of leaving a distance from screen, just must guaranteeing not exist in the light path till from the projector to the screen the such place of barrier of shading light.The restriction that the position is set of such projector, display frame is big more just to become remarkable more.Particularly under narrow and small indoor situation, show the big picture difficulty that will become.In addition, the people can not enter within the light path in also will considering during display image.

In the last few years, people had proposed to carry out technology near projection by means of front projection formula projector.Since make near projection become be possible, so for example projector can be configured on the near position of wall.Owing to can be configured in projector apart from the near position of wall, for example apart from the tens of cm of wall with on the interior position, so can reduce the restriction that the position is set of projector, also can save the space.In addition, not only indoorly also can carry out the demonstration of big picture, can also reduce for the people entering worry in the light path narrow and small.Carry out projector, can adopt the optical system of ultrashort focal length near projection.By the optical system of ultrashort focal length, can show big picture to lack projector distance.Want to realize ultrashort focal length, just need make the optical element of wide wide-angleization.Only want by means of making light transmissive optical element, for example only carry out wide-angleization by means of lens, cost can be very high.With respect to this, for example in the technology that patent documentation 1 is proposed,, realized ultrashort focal length by means of the combination that aspheric mirror is only arranged.

[patent documentation 1] TOHKEMY 2002-40326 communique

The most of front projection formula projector that was in the past popularized all possesses the zoom function that is used for regulating picture dimension.In general, the zoom function of projector, the position adjustment of optical element that can be by constituting optical system waits and realizes.The optical system of the ultrashort focal length of the sort of formation that proposes in the picture patent documentation 1 only just has very high difficulty requirement for the design that can carry out big wide-angleization.Therefore, be to be difficult to add again the such design of zoom function in the structure that can carry out big wide-angleization.Even if can add the design of zoom function, the result also can cause the increasing substantially of complicated, cost of formation.For such situation, as the projector of the optical system formation that is proposed in the patent documentation 1 etc., that be mounted with ultrashort focal length, great majority all will guarantee zoom function by means of the way that projector body is moved.When regulating picture dimension, all need mobile projector machine body, not only inconvenient, also limited the constant setting of projector.In so existing technology, exist the problem that is difficult to realize to carry out easily to regulate near projection, again the such formation of picture dimension.The present invention finishes in view of the above problems, and its purpose is a kind ofly can be provided at the projector that carries out near easily carrying out the adjusting of picture dimension under the situation of projection.

Summary of the invention

In order to solve above-mentioned problem, realize purpose, the invention provides a kind of projector, it is characterized in that, have: projection engine portion, this projection engine portion possesses light source portion and is used to show on plane of illumination from the light of above-mentioned light source portion the image forming part of the image of desired size, and optical projection that will be corresponding with picture signal is to above-mentioned plane of illumination; With the casing of taking in projection engine portion; Wherein, projection engine portion can move on the direction of light path in casing.

Change the projector distance variation by projection engine portion is moved, just can carry out the adjusting of picture dimension.By projection engine portion is moved just can move the projector that has set in casing.Therefore, just can realize the constant fixing and zoom function of projector.Particularly under the situation of the optical system of using ultrashort focal length,, also can change picture dimension significantly even if be accommodated in the moving of projection engine portion of the sort of degree in the common casing.Do not need the optical system of projection engine portion is added the design of zoom function,, can easily realize zoom function so can not encourage difficulty, structure complicated of Design for optical system.Owing to as long as projection engine portion is made as removable, design easy formation, can reduce manufacturing cost so can be made as.In addition, have benefited from easy formation, can also realize the zoom mechanism that reliability height and precision are high.Therefore, obtain the projector that can under carrying out, regulate picture dimension easily near the situation of projection.

In addition, as preferred example of the present invention, it is desirable to image forming part and have the wide-angle reflecting part that makes the light wide-angleization by means of reflection.By means of this, can carry out formation near projection thereby just can constitute the big wide-angleization that to carry out light.

In addition, as preferred example of the present invention, ideal is that image forming part has projecting lens, and the wide-angle reflecting part makes the light wide-angleization from projecting lens.Projecting lens carries out the imaging on the plane of illumination and the wide-angleization of light.The wide-angle reflecting part makes the wide wide-angleization from projecting lens, by means of this, just can form the formation that can carry out near projection.

In addition,, it is desirable to projecting lens and wide-angle reflecting part, be configured to make optical axis consistent substantially, and a light lateral deviation specific with respect to optical axis direction moved as preferred example of the present invention.By making light, can make the direct of travel unanimity of light in the mode that becomes big incident angle with respect to plane of illumination from the specific side shifting of optical axis direction.By means of this, just can carry out near projection.

In addition, as preferred example of the present invention, it is desirable to projection engine portion and be constituted as and carry out the focus adjustment.Under the situation of the adjusting of carrying out picture dimension,, just produced necessity of adjusting focus owing to the variation of projector distance.By means of this, when regulating picture dimension, can show high quality images.

In addition, as preferred example of the present invention, it is desirable to projection engine portion has: possess the projecting lens of a plurality of optical elements and make wide-angle reflecting part from the light wide-angleization of projecting lens, at least one of optical element that constitutes projecting lens can move on optical axis direction.By means of this, just can form and to carry out the formation that focus is adjusted.

In addition, as preferred example of the present invention, at least one optical element that it is desirable to be configured in wide-angle reflecting part one side in optical element is movably.By means of this, just can constitute easily and easily and carry out the focus adjustment with design.

In addition, as preferred example of the present invention, it is desirable to image forming part and have a plurality of mirror bodies, at least one of mirror body can move.By means of this, just can form and to carry out the formation that focus is adjusted.

In addition, as preferred example of the present invention, it is desirable to image forming part and have according to the spatial light modulating apparatus of image signal modulation from the light of light source portion.Under by means of the situation of spatial light modulating apparatus modulation from the light of light source portion, light source portion does not need to adjust light quantity according to picture signal as long as penetrate the light quantity of regulation.By means of this, display image on plane of illumination easily just.

In addition, as preferred example of the present invention, it is desirable to light source portion and penetrate laser, image forming part has by laser from light source portion is scanned the scanister of display image on plane of illumination.Thereby the laser from light source portion is scanned under the situation of display image on the plane of illumination,, but can use projecting lens ground to carry out the demonstration of image though need adjust light source portion according to picture signal.By means of this, display image on plane of illumination easily just.

Description of drawings

The summary that Fig. 1 shows the projector of embodiments of the invention 1 constitutes.

The summary that Fig. 2 shows light engine constitutes.

Show the optical system of projection engine portion Fig. 3 model utility.

Fig. 4 shows the figure of emulation that has carried out the action of the light after the modulation according to picture signal.

Fig. 5 shows the figure of emulation that has carried out the action of the light after the modulation according to picture signal.

Fig. 6 is the figure that the adjusting of the picture size of being undertaken by projector is described.

Fig. 7 is the figure that the relation to the distance of distance projected position and picture size describes.

Fig. 8 is the figure that the focusing adjustment describes.

Fig. 9 is the figure that the focusing adjustment describes.

The summary that Figure 10 shows the projection engine portion of embodiments of the invention 2 constitutes.

Label declaration

10: projector; 11: projection engine portion; 12: light engine; 13: projecting lens; 14: aspheric mirror; 15: casing; 16: screen; K: frame; W: wall; 21R: red (R) light LED; 21G: green (G) light LED; 21B: blue (B) light LED; 22: collimation lens; 23R:R light spatial light modulating apparatus; 23G:G light spatial light modulating apparatus; 23B:B light spatial light modulating apparatus; 24: the cross colour splitting prism; 25: the 1 dichroic coatings; 26: the 2 dichroic coatings; AX: optical axis; N: normal; 17,18,19: screen; 30,31: lens; 40: projection engine portion; 41,42,43,44: aspheric mirror.

Embodiment

Below, explain embodiments of the invention referring to drawing.

Embodiment 1

The summary that Fig. 1 shows the projector 10 of embodiments of the invention 1 constitutes.Projector 10 is front projection formula projectors of the projection light corresponding with picture signal.Projector 10 is from the near position of distance plane of illumination, and for example carry out near projection the position from about the tens of cm of wall W of distance configuration screen 16.Projector 10 has projection engine portion 11.Projection engine portion 11 is to carried out the light after the modulation according to picture signal as screen 16 projections of plane of illumination.Projection engine portion 11 has light engine 12, projecting lens 13 and aspheric mirror 14.Light engine 12, projecting lens 13 and aspheric mirror 14 are accommodated in the projection engine portion 11, by projection engine portion 11 is moved they are moved integratedly.

The summary that Fig. 2 shows light engine 12 constitutes.As redness (R) the light LED21R of solid light source, be the light source portion of supplying with R light.From the R light of red (R) light with LED21R, carrying out after the parallelization with collimation lens 22, adorn 23R incident to R light with spatial light modulation.R light is adorned 23R with spatial light modulation, is the spatial light modulating apparatus according to image signal modulation R light, and is transmissive liquid crystal display device.Carried out the R light after the modulation with R light with spatial light modulation dress 23R, to cross colour splitting prism 24 incidents as the look combining optical.

As green (G) the light LED21G of solid light source, be the light source portion of supplying with G light.From the G light of green (G) light with LED21G, carrying out after the parallelization with collimation lens 22, adorn 23G incident to G light with spatial light modulation.G light is adorned 23G with spatial light modulation, is the spatial light modulating apparatus according to image signal modulation G light, and is transmissive liquid crystal display device.Carried out the G light after the modulation with G light with spatial light modulating apparatus 23G, from a side direction cross colour splitting prism 24 incidents different with R light.

As blueness (B) the light LED21B of solid light source, be the light source portion of supplying with B light.From the B light of blue (B) light with LED21B, carrying out after the parallelization with collimation lens 22, adorn 23B incident to B light with spatial light modulation.B light spatial light modulating apparatus 23B is the spatial light modulating apparatus according to image signal modulation B light, and is transmissive liquid crystal display device.Carried out the B light after the modulation with B light with spatial light modulation dress 23B, from R light, a different side direction cross colour splitting prism 24 incidents of G light.In addition, light engine 12 also can constitute for example bar-shaped integraph of homogenising optical system, the fly lens of the intensity distributions homogenising that makes light beam, the formation of overlapping lens.

Cross colour splitting prism 24 has and is configured to each other the 1st dichroic coating 25 and the 2nd dichroic coating 26 of quadrature substantially.The 1st dichroic coating 25 reflection R light, transmission G light and B light.The 2nd dichroic coating 26 reflection B light, transmission R light and G light.Synthetic homonymy R light, G light and the B light of going into to shine never respectively of cross colour splitting prism 24 is to the direction outgoing of projecting lens 13.Light after projecting lens 13, projection synthesize with cross colour splitting prism 24.

As transmissive liquid crystal display device, for example can use high temperature polysilicon TFT liquid crystal panel (High Temperature Polysilicon; HTPS).Light engine 12 is not limited to the situation as spatial light modulating apparatus use transmissive liquid crystal display device.Also can use reflection-type liquid-crystal display device (Liquid Crystal On Silicon as spatial light modulating apparatus; LCOS), DMD (Digital Micromirror Device; Digital Micromirror Device), GLV (Grating Light Valve; Grating light valve) etc.Projector 10 is not limited to each coloured light is all possessed the formation of spatial light modulating apparatus.Projector 10 also can constitute with a spatial light modulating apparatus modulation 2 or 3 coloured light.In addition, light engine 12 also is not limited to use as light source portion the situation of LED.For example also can use the lamp of solid light source beyond the LED such as LASER Light Source, extra-high-pressure mercury vapour lamp etc. as light source portion.

Return Fig. 1, aspheric mirror 14 be set at projecting lens 13 position in opposite directions on.Aspheric mirror 14 is to make wide-angle reflecting part from the light wide-angleization of projecting lens 13, the curved surface with aspherical shape by means of reflection.Aspheric mirror 14 has to be made from the function of the light wide-angleization of projecting lens 13 and makes the function of advancing to the direction of screen 16 from the light bending of projecting lens 13.R light with spatial light modulating apparatus 23R, G light with spatial light modulating apparatus 23G, B light with spatial light modulating apparatus 23B, projecting lens 13 and aspheric mirror 14, be used to from as redness (R) light of light source portion with LED21R, green (G) light with LED21G, blueness (B) light image forming part with the light of the LED21B image of the desirable size of Projection Display on as the screen 16 of plane of illumination.Aspheric mirror 14, for example, can be by forming reflectance coating on the base material of resin component element etc. and constitute having.As reflectance coating, can use the layer of the member of highly reflective, for example, the layer of the hardware of aluminium etc. or dielectric multilayer film etc.In addition, also can on reflectance coating, form diaphragm with transparent component.

Aspheric mirror 14 is by being made as curve form, so can carry out the bending and the wide-angleization of light simultaneously.By not only also making the light wide-angleization,, can make projecting lens 13 miniaturizations compared with the situation that only makes the light wide-angleization by means of projecting lens 13 by means of aspheric mirror 14 by means of projecting lens 13.Projecting lens 13 and aspheric mirror 14 carry out the expansion and the imaging on screen 16 of image.Projecting lens 13 plays a part the expansion and the imaging on screen 16 of image.14 expansions that play a part image of aspheric mirror.Aspheric mirror 14 also can suit to be out of shape the distortion that makes it possible to correction image.

Casing 15 is taken in projection engine portion 11.Casing 15 is formed has projection engine portion 11 can move the sort of degree in casing 15 inside dimension.Screen 16 is reflection reflection of light formula screens from projection engine portion 11.Screen 16 can have good field angle characteristic by light can be spread in having observer's desirable scope.

Projection engine portion 11 can be accommodated in the casing 15 fully, in addition also can for example, stretch out the part of aspheric mirror 14 for stretch out the part of projection engine portion 11 from casing 15.Also the mirror body that is used for making the light path bending can be set between projecting lens 13 and aspheric mirror 14.Under the situation that will make crooked 90 degree of light path with the mirror body, light engine 12 can be configured so that light penetrates to paper above-below direction or the paper depth direction of Fig. 1.By means of this, just can all be configured to projection engine portion 11 on the nearer position of wall W.

Projector 10 is configured in and is positioned near the frame K of wall W.In addition, projector 10 for example also can be arranged on ground, desk or the cupboard etc.Projector 10 is owing to being the formation of compact, so can easily guarantee to be provided with the place.Owing to can be arranged on projector 10 near the wall W, so even if indoorly also can show big picture narrow and small.

Show the optical system of projection engine portion 11 Fig. 3 model utility.Projecting lens 13 is configured to make optical axis consistent substantially with aspheric mirror 14.The normal N of screen 16 is parallel with the optical axis of projecting lens 13 and the optical axis of aspheric mirror 14 substantially.Projecting lens 13 and aspheric mirror 14 constitute the so-called centered optical system that all has common optical axis AX.In addition, projection engine portion 11 and screen 16, constitute to make according to picture signal carried out the light after the modulation capable with respect to optical axis AX to so-called off-set optical system that the particular side skew is advanced.

Specifically, make according to picture signal carried out after the modulation light with respect to optical axis AX to the paper upside skew of Fig. 3 advance.On the other hand, the centre normal of the image planes that imagination ground forms on the exit facet of the cross colour splitting prism 24 in light engine 12 is parallel with respect to optical axis AX, and, to the opposition side of particular side, promptly with respect to the paper downside skew of optical axis AX to Fig. 3.By means of such formation, projection engine portion 11 just can incident with respect to the light of 16 one-tenth big incident angles of screen.Incident angle is the normal N of screen 16 and the angle that incident ray is constituted.

Owing to adopt centered optical system, so can adopt the design techniques of common coaxial system.Therefore, just can reduce Design for optical system man-hour, and can realize the optical system that aberration is little.Aspheric mirror 14 can become the rotational symmetric substantially shape with respect to optical axis AX, for example, has cut away the shape of an apex part in addition in cone shape.By aspheric mirror 14 being become rotational symmetric substantially shape, just can easily make the optical axis of the optical axis of aspheric mirror 14 and other formations consistent for optical axis AX.Aspheric mirror 14 is owing to become and be axisymmetric aspherical shape, so can process with the simple and easy method of lathe etc.Therefore, just can be easily and make aspheric mirror 14 accurately.

Projector 10 has adopted super wide-angle optics, that is, by use projecting lens 13 and aspheric mirror 14 field angle θ be made as at least 150 degree above, for example be made as 160 degree.In addition, by adopting the off-set optical system of a part of angular range in the angular range that only uses super wide-angleization, can make the direct of travel unanimity of light.Under the situation of present embodiment, for example, the minimum incident angle on the screen 16 is 70 degree, and the maximum incident angle degree is 80 degree.By adopting the off-set optical system, differential seat angle to the light of screen 16 incidents is become be about 10 degree in.

Fig. 4 and Fig. 5 show the emulation according to the action of the light after the image signal modulation.As shown in Figure 4, projecting lens 13 is to constitute with 9 spherical lenses.Spherical lens is the optical element that makes transmittance and deflection.G light vertically is offset with respect to optical axis AX with spatial light modulating apparatus 23B (not shown R light spatial light modulating apparatus 23R is configured in depth one side of cross colour splitting prism 24) with spatial light modulating apparatus 23G, B light, has just realized the off-set optical system.As shown in Figure 5, projecting lens 13 utilization has been passed through the light imaging on screen 16 behind the aspheric mirror 14.In addition, the formation of projecting lens 13 is not limited to illustrated in the present embodiment formation, gets final product so long as can surpass the formation of wide-angleization.

Fig. 6 is the figure that the adjusting to the picture dimension of projector 10 describes.Projection engine portion 11 is constituted as in casing 15 and can moves on substantially perpendicular to the direction as the screen 16,17 of plane of illumination.The so-called direction of normal to screen 16,17 substantially is directions parallel substantially with optical axis, and is the direction along light path.In being shown in figure in the state in hollow arrow left side, projector 10 shows that on screen 16 diagonal-size for example is 45 inches a picture.At this moment, projection engine portion 11 is positioned at the position in wall W side of casing 15.When direction mobile projector engine portion 11 that the arrow that goes away from wall W from the state that shows 45 inches picture is represented, just become the state that is shown in the right side of hollow arrow among the figure in casing 15.

In being shown in figure during the state on hollow arrow right side, projector 10 shows on screen 17 is that for example diagonal-size is 67 inches a picture.At this moment, projection engine portion 11 is in the position at the opposition side of wall W side in the casing 15.The screen 17 that shows 67 inches picture is bigger and be configured in the vertical direction upside than the screen 16 of picture that shows 45 inches.When the direction that projection engine portion 11 is represented to the arrow of using close wall W in casing 15 moved, projector 10 just returned the state of the picture that shows 45 inches.As mentioned above, move in casing 15 by making projection engine portion 11, projector 10 just can carry out the adjustment of picture dimension between the big picture of 45 inches little picture and 67 inches.Projector 10 of the present invention can carry out the adjustment of picture dimension and projector's 10 bodies are moved.

Projection engine portion 11, for example, can be according to being intended to indicate the input operation of carrying out the picture dimension adjustment automatically to move or manually move.Projection engine portion 11 is as long as owing to can move back and forth on the direction of light path, move so for example can constitute on the guide rail of linearity or along guide way.In addition, though being when showing little picture and preparing the situation of the screen 16,17 of different size when showing big picture of explanation in the present embodiment,, also can so that little picture and big picture all on same screen, show.

Fig. 7 is the figure that describes apart from the relation by means of the distance of the projected position of projector's 10 projected light and picture dimension.Height till the longitudinal axis in the chart is represented from the projected position to the display position, the distance till transverse axis is represented from the projected position to the display position.So-called distance till from the projected position to the display position is substantially perpendicular to the distance on the direction of plane of illumination.Under 45 inches that represent with solid line situations and 67 inches situation dotting, the distance till from the projected position to the display position is limited to the variation about 100mm.If the casing of common employed size 15, then mobile about the 100mm of projection engine portion 11 is fully possible.By adopting the optical system of ultrashort focal length, can change picture dimension significantly by means of the moving of the projection engine portion 11 that is incorporated in the sort of degree in the common casing 15.

In the present embodiment, the incident maximum angle of the light of screen 16,17 for example is 80 degree.Distance from wall W to projected position depends on the incident angle (tan θ) of light.Therefore, if the incident maximum angle is changed into 70 degree from 80 degree, then the amount of movement needs of the projection engine portion 11 when 45 inches and 67 inches are elongated is 2 times.If in common casing 15, the amount of movement that make projection engine portion 11 for example from about the 100mm multiplication for about 200mm being unusual difficulty.Therefore, it is desirable to strengthen as much as possible the incident maximum angle of light on screen 16,17, for example be made as 80 the degree about or more than.

Need not increase the design of zoom function, thereby can not encourage difficulty, formation complicated of Design for optical system, and can easily realize zoom function for the optical system of projection engine portion 11.As long as,, can reduce manufacturing cost so can easily design owing to make projection engine portion 11 to move.In addition, have benefited from easy formation, can realize the zoom mechanism that reliability height and precision are high.By means of this, play the effect that under carrying out, easily to carry out the adjusting of picture dimension near the situation of projection.Projector 10 is not limited to make the projection engine portion 11 can be along the formation that moves perpendicular to the direction of plane of illumination substantially.As long as projection engine portion 11 can move on the direction of light path.For example, make light path substantially under the situations of crooked 90 degree constituting by means of being arranged on catoptron between projecting lens 13 and the aspheric mirror 14, projection engine portion 11 can be in the direction that is parallel to optical axis substantially, promptly be parallel to substantially on the direction of plane of illumination and move.

Projector 10, for example when common TV programme, show little picture, film etc. want to obtain sense on the spot in person the time show big picture, can view and admire according to content like this.In addition, projector 10 is not limited to carry out the adjusting of picture size between 45 inches and 67 inches.Displayable picture size can suit according to the formation of projector 10 to set.In addition, remove can switch for 2 kinds of pictures of different size outside, also can constitute and can switch for the mutually different picture more than 3 kinds of size.

Projector 10 is owing to carrying out near projection, so not only can reduce the restriction that the position is set, all right save spaceization.In addition, not only indoorly also can carry out the demonstration of big picture, can also alleviate the people and enter into worry in the light path narrow and small.Also tend under the present case of big picture at the home-use reflection equipment of reflection equipment of professional usefulness not only, can show that the projector of big picture has caused people's attention.In the time need being arranged on projector on the position that keeps away screen to a certain degree, if the narrow and small indoor central authorities that will be arranged on projector the room.To be fixing consistently room central authorities at home of projector difficult.And then, not only when each the use, all to carry out the operation that is provided with of projector, also must carry out being connected between the external unit with DVD etc.

If projector 10 of the present invention then can be fixed on projector's 10 bodies near on the position of wall W the trouble that can reduce setting thus, connects consistently.In addition, if existing projector, then to be arranged on projector on the near position of observer mostly,, if projector of the present invention 10, then can be arranged on projector on the wall W person's that closely is the outlying observation position with respect to this.Because on the person's that is arranged on the outlying observation of projector 10 position,, can carry out comfortable reflection and view and admire so can alleviate from as the influence of the whir of the heat of the lamp of thermal source or radiator fan to the observer.

Fig. 8 and Fig. 9 are the figure that the focusing adjustment describes.Projector 10 under the situation of the adjustment of carrying out picture dimension, owing to the variation of projector distance, just need carry out the adjustment of focus.Projection engine portion 11 it is desirable to be constituted as and can move on the direction of light path, simultaneously, can carry out the focus adjustment.2 lens 30 that are arranged on aspheric mirror 14 1 sides in projecting lens 13 are set to and can move on optical axis AX direction.The focus adjustment of projection engine portion 11 can be undertaken by 2 such lens 30 are moved.Lens 30 are spherical lenses, are the optical elements that makes transmittance and deflection.For the lens except that these 2 lens 30 in the projecting lens 13, make the relative position relation between they and the aspheric mirror 14 constant.

For example, showing under 57 inches the situation of picture, just as the upside of hollow arrow in being shown in Fig. 8,2 lens 30 are configured in leaning on the position of aspheric mirror 14 sides in the projecting lens 30.By 2 lens 30 are configured on this position, as be illustrated in the left side of hollow arrow of Fig. 9, will showing imaging on 57 inches the screen 18 of picture.Like this, carry out the focus adjustment of 57 inches picture.

Secondly, suppose and to be adjusted to 91 inches to picture dimension.At this moment, make 2 lens 30 to use from aspheric mirror 14 away from and the direction shown in the arrow that goes move.So, as be shown in the downside of hollow arrow of Fig. 8, make 2 lens 30 move to position near the other lenses 31 adjacent in the projecting lens 13 with 2 lens 30.By making 2 lens 30 move to such position, as be shown in the right side of hollow arrow of Fig. 9, will be in the screen 19 top imagings that show 91 inches picture.Like this, carry out the focus adjustment of 91 inches picture.To be adjusted into picture dimension once more under 57 inches the situation,, carry out the focus adjustment by making 2 lens 30 to moving near the direction shown in the arrow of aspheric mirror 14.

Employing is carried out the way that focus is adjusted with the adjustment of picture dimension, just can all show high quality images when regulating picture dimension.2 lens 30 for example, can automatically move or manually move according to the input operation that the meaning is carried out the focus adjustment for indication.In addition, also can move 2 lens 30 linkedly, automatically carry out the focus adjustment simultaneously in the adjusting of picture dimension thus with the mobile phase of the projection engine portion 11 that is used for regulating picture dimension.

Projection engine portion 11, be not limited to make 2 lens 30 that are configured in aspheric mirror 14 1 sides in the projecting lens 13 to move and carry out the focus adjustment, move as long as make as the lens that are configured at least 1 optical element of aspheric mirror 14 1 sides in the projecting lens 13.By the lens that are configured in aspheric mirror 14 1 sides in the projecting lens 13 are moved, can utilize to be easy to design and carry out the focus adjustment with easy the formation.In addition, as long as make in the lens that constitute projecting lens 13 at least 1 to move.For example, also can constitute the lens that make except that the lens that are configured in aspheric mirror 14 1 sides moves.

Projector 10 is not limited to from the formation of the below projected light of plane of illumination.Projector 10 also can constitute the top projected light from plane of illumination.Light is carried out under the situation of projection above plane of illumination, and projector 10 is from the state shown in Figure 1 configuration of turning upside down.Light is carried out under the situation of projection above plane of illumination, and projector 10 also can be set to for example be suspended on the indoor ceiling.Projector 10 of the present invention, in case move again with regard to not needing after having set, thus can be fixed on the ceiling consistently, and can realize zoom function.Projector 10 adjusts function as long as have zoom function at least thereby can omit focus.

Embodiment 2

The summary that Figure 10 shows the projection engine portion 40 of embodiments of the invention 2 constitutes.The projection engine portion 40 of present embodiment can be applied to above-mentioned projection engine portion 10 (referring to Fig. 1).The projection engine portion 40 of present embodiment is characterized in that having 4 aspheric mirrors 41,42,43 and 44.All give same label and the repetitive description thereof will be omitted for those parts identical with embodiment 1.Aspheric mirror 41,42,43 and 44 is the mirror bodies with curved surface of aspherical shape.Projection engine portion 40 constitutes the so-called decentered optical system that does not have common optical axis.

From the light of projection engine portion 40, carried out reflection with each aspheric mirror 41,42,43 and 44 after, to not shown screen incident.The 4th aspheric mirror 44 that the light behind 3 aspheric mirrors 41,42 and 43 has been passed through in reflection is the wide-angle reflecting parts that make the wide-angleization of light in each aspheric mirror 41,42,43 and 44, has the same function of aspheric mirror 14 (referring to Fig. 3) with embodiment 1.

Projection engine portion 40, same with the projection engine portion 11 (referring to Fig. 1) of the foregoing description 1, by on the direction of light path, moving the adjusting of carrying out picture dimension.In addition, projection engine portion 40 also moves with the fore-and-aft direction shown in two arrows in figure by means of making at the catoptrical aspheric mirror 43 in the front of the 4th aspheric mirror 44, carries out the focus adjustment.By means of this, under the situation of present embodiment, whenever carrying out to show high quality images when picture dimension is regulated.

Projection engine portion 40 is so long as make among 4 aspheric mirrors 41,42,43 and 44 at least one move to carry out the formation that focus adjusts and get final product.In addition, projection engine portion 40 is not limited to have the formation of 4 aspheric mirrors 41,42,43 and 44, gets final product so long as have the formation of a plurality of mirror bodies.In this case, projection engine portion 40 just can constitute and make among a plurality of mirror bodies at least 1 can move and carry out the focus adjustment.

Projector 10, also can be the projector of laser scanning type, that is, the scanister with inspection Electronic Speculum (galvano-mirror) etc. replaces image forming part in the above embodiments as image forming part, by the laser from light source is scanned, to being projected the face projected image.Projector appreciates the so-called projection projector afterwards of image by supply with light, observation on a face of screen from the light of the another side ejaculation of screen.

The possibility of industrial utilization

As mentioned above, projector of the present invention is suitable for the situation near projection.

Claims (8)

1. projector is characterized in that having:
Projection engine portion, this projection engine portion possess the optical engine part of sending the light that has been carried out spatial light modulation, amplify and projection makes wide-angle reflecting part from the light wide-angleization of above-mentioned projecting lens from the projecting lens of the light of above-mentioned optical engine part with by means of reflection; With
Take in the casing of above-mentioned projection engine portion;
Above-mentioned projection engine portion can move on the direction of light path in above-mentioned casing.
2. projector according to claim 1 is characterized in that: above-mentioned projecting lens and above-mentioned wide-angle reflecting part, it is unanimous on the whole to be configured to optical axis, and light is moved with respect to the specific lateral deviation of above-mentioned optical axis direction.
3. projector according to claim 1 is characterized in that: above-mentioned projection engine portion is constituted as and can carries out the focus adjustment.
4. projector according to claim 3 is characterized in that above-mentioned projecting lens possesses a plurality of optical elements, and at least one in above-mentioned a plurality of optical elements can move on the optical axis direction of this projecting lens.
5. projector according to claim 4 is characterized in that: one or more optical elements among above-mentioned a plurality of optical elements, that approach above-mentioned wide-angle reflecting part side can move.
6. projector according to claim 3 is characterized in that: above-mentioned projection engine portion has a plurality of mirror bodies, and at least one of above-mentioned mirror body can move.
7. according to any one the described projector in the claim 1~6, it is characterized in that: above-mentioned optical engine part has according to the spatial light modulating apparatus of image signal modulation from the light of light source portion.
8. projector is characterized in that having:
Projection engine portion, this projection engine portion possess the light source portion that penetrates laser and by laser from above-mentioned light source portion is scanned on plane of illumination the scanister of display image;
Take in the casing of above-mentioned projection engine portion;
Above-mentioned projection engine portion can move on the direction of light path in above-mentioned casing.
CN200710196008XA 2006-11-28 2007-11-28 Projector CN101191988B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2006319740 2006-11-28
JP319740/2006 2006-11-28
JP246672/2007 2007-09-25
JP2007246672A JP5239279B2 (en) 2006-11-28 2007-09-25 projector

Publications (2)

Publication Number Publication Date
CN101191988A CN101191988A (en) 2008-06-04
CN101191988B true CN101191988B (en) 2010-04-21

Family

ID=39487056

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200710196008XA CN101191988B (en) 2006-11-28 2007-11-28 Projector

Country Status (4)

Country Link
JP (1) JP5239279B2 (en)
KR (1) KR100938029B1 (en)
CN (1) CN101191988B (en)
TW (1) TWI366733B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5044234B2 (en) * 2007-02-16 2012-10-10 三洋電機株式会社 Projection display
US8246176B2 (en) 2007-03-06 2012-08-21 Sanyo Electric Co., Ltd. Projection display device having an operation section for displacing a lens
JP4901595B2 (en) * 2007-03-06 2012-03-21 三洋電機株式会社 Projection display
JP5359607B2 (en) * 2008-09-02 2013-12-04 株式会社リコー Variable magnification optical system, projector
JP5332574B2 (en) * 2008-12-10 2013-11-06 株式会社ニコン Projection device
JP4730434B2 (en) 2008-12-25 2011-07-20 日本ビクター株式会社 Screen assembly and rear projection type image display device
KR101072191B1 (en) 2009-02-16 2011-10-10 현대자동차주식회사 Vehicle instrument panel with rear projector
JP5317787B2 (en) * 2009-03-26 2013-10-16 三洋電機株式会社 Projection display device
JP2011253130A (en) * 2010-06-04 2011-12-15 Hitachi Consumer Electronics Co Ltd Rear projection type video display device
CN102096293B (en) * 2011-01-30 2012-06-27 河南科技大学 Optical engine for three-piece liquid crystal on silicon (LCOS) laser projection display
CN102681173A (en) * 2011-03-18 2012-09-19 上海三鑫科技发展有限公司 Ultra-short distance projection optical lens system
JP2012252252A (en) 2011-06-06 2012-12-20 Seiko Epson Corp Projector
JP5999296B2 (en) 2011-08-30 2016-09-28 株式会社リコー Electronics
JP5686256B2 (en) 2011-08-30 2015-03-18 株式会社リコー Projector device
JP5686255B2 (en) 2011-08-30 2015-03-18 株式会社リコー Projector device
JP5696644B2 (en) * 2011-11-04 2015-04-08 株式会社リコー Image display device
CN102749795A (en) * 2012-06-29 2012-10-24 北京纽曼腾飞科技有限公司 Fold-back combined projector
US8922883B2 (en) 2012-11-05 2014-12-30 Ricoh Company, Ltd. Magnification optical system
JP2015143861A (en) * 2015-02-12 2015-08-06 株式会社リコー Projection optical system and image display device
CN104991412B (en) * 2015-08-13 2016-11-02 白衡 Ultrashort out-of-focus projection device
JP2016021070A (en) * 2015-08-19 2016-02-04 日立マクセル株式会社 Projection type video display apparatus
JP6450424B2 (en) * 2017-07-04 2019-01-09 株式会社nittoh Apparatus and projector for supporting reflecting surface
KR101980733B1 (en) * 2017-12-18 2019-05-21 주식회사 레이앤리소시스 Front-Reflection Type Projection System for Cinema

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432619A (en) * 1981-02-24 1984-02-21 Topper Manufacturing Corporation Compact collapsible microform viewer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4453154B2 (en) * 2000-03-17 2010-04-21 コニカミノルタオプト株式会社 Oblique projection optical system and rear projection optical system
JP3727543B2 (en) * 2000-05-10 2005-12-14 三菱電機株式会社 Image display device
JP2004069776A (en) 2002-08-01 2004-03-04 Canon Inc Rear projection type projector
JP3778444B2 (en) * 2003-02-26 2006-05-24 Necビューテクノロジー株式会社 Retractable home theater system
JP2004287205A (en) 2003-03-24 2004-10-14 Seiko Epson Corp Projector
JP2005106900A (en) * 2003-09-29 2005-04-21 Canon Inc Projection image forming optical system
JP4963346B2 (en) * 2004-10-14 2012-06-27 キヤノン株式会社 Projection optical system and projection display device having the same
JP4889289B2 (en) * 2004-12-13 2012-03-07 日東光学株式会社 Optical system and rear projector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432619A (en) * 1981-02-24 1984-02-21 Topper Manufacturing Corporation Compact collapsible microform viewer

Also Published As

Publication number Publication date
JP5239279B2 (en) 2013-07-17
CN101191988A (en) 2008-06-04
TWI366733B (en) 2012-06-21
KR100938029B1 (en) 2010-01-21
JP2008158495A (en) 2008-07-10
TW200832043A (en) 2008-08-01
KR20080048408A (en) 2008-06-02

Similar Documents

Publication Publication Date Title
US9348210B2 (en) Projection apparatus and transparent screen for it
JP2016045252A (en) Projection device and head-up display device
JP5525042B2 (en) Laser light projector with speckle reduction element capable of out-of-plane motion
US6879444B2 (en) Imaging optical system
KR100382953B1 (en) Picture display device
EP1257128B1 (en) Projection-type display apparatus
US6755534B2 (en) Prismatic optical display
US8292438B2 (en) Projection image display device and projection optical system for performing extended projection
US7178921B2 (en) Image projection apparatus
JP3429291B2 (en) Projection lens for projection display device
CN1742228B (en) Rear projection display
US7911704B2 (en) Projection optical system and image display apparatus
TWI414872B (en) Projection image display system
CN100412685C (en) Light tunnel, uniform light illuminating device and projector employing the same
US20200004129A1 (en) Focus adjustment system for an image display device
JP3733852B2 (en) display device
US6805447B2 (en) Rear projection display device and projecting method used for the same
US7090354B2 (en) Projection device and screen
US7984994B2 (en) Image display apparatus
CN103959126B (en) Projection optical system and projection type video display device
JP5371180B2 (en) Projection display device
US7175287B2 (en) Wide angle projection lens
JP5049464B2 (en) Reflective optical system and projection display device using the same
US6857750B2 (en) Offset projection for slim rear projection displays
CN101140353B (en) Projecting optical unit and projecting type image display apparatus therewith

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant