CN101154025B - Projection-type image display device and projection-type image display system - Google Patents
Projection-type image display device and projection-type image display system Download PDFInfo
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- CN101154025B CN101154025B CN2007101531366A CN200710153136A CN101154025B CN 101154025 B CN101154025 B CN 101154025B CN 2007101531366 A CN2007101531366 A CN 2007101531366A CN 200710153136 A CN200710153136 A CN 200710153136A CN 101154025 B CN101154025 B CN 101154025B
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Abstract
A projection-type image display device includes an image light generator (40) configured to generate image light, a projection optics configured to project the image light onto a screen (11). The projection optics includes a reflection mirror (50) configured to reflect the image light toward the screen, the image light outputted from the image light generator (60). A projection-type image display device includes a protective cover (160) provided on an optical path of the image light reflected by the reflection mirror (50). The protective cover (160) has a transmissive region (161) transmitting the image light reflected by the reflection mirror (50).
Description
Technical field
The present invention relates to a kind of projection-type image display device and porjection type display system that video light is incident upon the projection optics system on the screen that have.
Background technology
In the past, possess the projection-type image display device that is used to modulate the optical modulation element of the light that is sent by light source and is used for the light that optical modulation element penetrates is projected the projection lens on the screen is that everybody is known always.
At this,, the distance between projection lens and the screen need be increased in order on screen, to show video bigger.With respect to this, the porjection type display system (for example, patent documentation 1) that catoptron that light that a kind of utilization penetrates projection lens reflexes to screen side seeks to shorten the distance between projection-type image display device and the screen has been proposed.
At this, when seek to shorten between projection-type image display device and the screen apart from the time, projection-type image display device is entered in user's the visual field projection-type image display device, need thus from screen up and down or the side projection of tilting.For example, in above-mentioned porjection type display system, not only with the position of optical modulation element and projection optics system up and down direction move, and by utilizing convex mirror to carry out the cripetura of projection distance and the projection of tilting as catoptron.
In addition, in order to seek to shorten the distance between projection-type image display device and the screen, catoptron is configured in the position and the angle that can be incided screen by the light that projection lens penetrates from vergence direction.For example, in above-mentioned porjection type display system,, utilize convex mirror as catoptron in order to seek to shorten the distance between projection-type image display device and the screen.
Patent documentation 1: the spy opens 2004-45894 communique (claim 1, Fig. 2 etc.)
At this, in order on screen, the video that is throwed suitably to be shown, catoptron be configured to very important key element.Thereby when the user touched catoptron, the angle of catoptron etc. can change, and can not on screen the video that is throwed suitably be shown thus.
Summary of the invention
At this, the present invention makes just in view of the above problems, even it is a kind of when projecting video light on the screen that its purpose is to provide, also can be well maintained for the projection-type image display device and the porjection type display system of the configuration precision of seeking to shorten the set catoptron of distance between projection-type image display device and the screen.
Of the present invention one is characterised in that, a kind of projection-type image display device (projection-type image display device 30) possesses: the video photogenerated portion (video photogenerated portion 40) that is used to generate video light; With the projection optics system (projection optics system 300) that above-mentioned video light is projected on the screen (screen 11), wherein, above-mentioned projection optics system has: will reflex to the catoptron (aspheric mirror 50) of above-mentioned screen side from the above-mentioned video light that above-mentioned video photogenerated portion penetrates, above-mentioned catoptron makes the emitted above-mentioned video light optically focused of above-mentioned video photogenerated portion between above-mentioned catoptron and above-mentioned screen, above-mentioned projection-type image display device also possesses: the protective cover (protective cover 60) that on light path, is provided with by the above-mentioned video light of above-mentioned mirror reflects, and above-mentioned protective cover has: be configured in by near the position of above-mentioned catoptron with above-mentioned video light optically focused, and make the zone that sees through by the above-mentioned video light transmission of above-mentioned mirror reflects.
According to relevant feature,, touch catoptron and the angle of catoptron is changed so can suppress the user because protective cover is arranged on the light path by the video light of mirror reflects.Since protective cover have the mirror reflects of allowing the video light transmission see through the zone, so can not hinder the video light that shines on the screen by protective cover.
Thereby, even video light is projected on the screen, also can be well maintained in order to seek to shorten the configuration precision of the set catoptron of distance between projection-type image display device and the screen.
Of the present invention one is characterised in that, in an above-mentioned feature, above-mentioned catoptron makes the emitted above-mentioned video light optically focused of above-mentioned video photogenerated portion between above-mentioned catoptron and above-mentioned screen, above-mentioned protective cover above-mentioned see through area configurations by above-mentioned catoptron with the position of above-mentioned video light optically focused (caustic surface a) near.
Of the present invention one is characterised in that, in an above-mentioned feature, above-mentioned protective cover has the opening (opening 161) that is communicated with to above-mentioned screen side from above-mentioned catoptron side, and above-mentioned is above-mentioned opening through the zone.
Of the present invention one is characterised in that, in an above-mentioned feature, at least a portion of above-mentioned protective cover is made of the photopermeability material, and the above-mentioned zone that sees through is made of above-mentioned photopermeability material.
Of the present invention one is characterised in that, a kind of porjection type display system (porjection type display system 100) possesses: screen (screen 11); Be used to generate the video photogenerated portion (video photogenerated portion 40) of video light; With the projection optics system (projection optics system 300) that above-mentioned video light is projected on the above-mentioned screen, above-mentioned projection optics system has: will reflex to the catoptron (aspheric mirror 50) of above-mentioned screen side from the above-mentioned video light that above-mentioned video photogenerated portion penetrates, above-mentioned catoptron makes the emitted above-mentioned video light optically focused of above-mentioned video photogenerated portion between above-mentioned catoptron and above-mentioned screen, above-mentioned porjection type display system also possesses: the protective cover (protective cover 60) that on light path, is provided with by the above-mentioned video light of above-mentioned mirror reflects, and above-mentioned protective cover has: be configured in by near the position of above-mentioned catoptron with above-mentioned video light optically focused, and make the zone that sees through by the above-mentioned video light transmission of above-mentioned mirror reflects.
According to the present invention, even can provide a kind of when projecting video light on the screen, also can be well maintained for the projection-type image display device and the porjection type display system of the configuration precision of seeking to shorten the set catoptron of distance between projection-type image display device and the screen.
Description of drawings
Fig. 1 is the figure (front elevation) of structure of the porjection type display system 100 of expression first embodiment.
Fig. 2 is the figure (side view) of structure of the porjection type display system 100 of expression first embodiment.
Fig. 3 is the figure of structure of the projection-type image display device 300 of expression first embodiment.
Fig. 4 is the figure (side view) of structure of the porjection type display system 100 of expression second embodiment.
Fig. 5 is the figure of the aspheric mirror 50 of expression second embodiment.
Fig. 6 is the figure of the caustic surface a of expression second embodiment.
Fig. 7 is the figure of the protective cover 160 of expression second embodiment.
Fig. 8 is the figure of the aspheric mirror 50 of expression the 3rd embodiment.
Fig. 9 is the figure of the caustic surface a of expression the 3rd embodiment.
Figure 10 is the figure of the protective cover 160 of expression the 3rd embodiment.
Figure 11 is the figure (side view) of structure of the porjection type display system 100 of expression the 4th embodiment.
Figure 12 is the figure of structure of the video photogenerated portion 40 of expression the 5th embodiment.
Figure 13 is the figure (side view) of structure of the porjection type display system 100 of expression the 6th embodiment.
Figure 14 is the figure (side view) of structure of the porjection type display system 100 of expression the 7th embodiment.
Figure 15 is the figure (side view) of structure of the porjection type display system 100 of expression the 8th embodiment.
Figure 16 is the figure (side view) of structure of the porjection type display system 100 of expression the 9th embodiment.
Among the figure: 10-main part, 11-screen, 20-base portion, the 21a-wheel, 21b-wheel, 30-projection-type image display device, 40-video photogenerated portion, 41-projection lens, 50-aspheric mirror, the 51-flexure plane, 52a-cantilever member, 52b-cantilever member, the 60-protective cover, 70-catoptron (reflection ミ ラ one), 100-porjection type display system, 151～155-catoptron (ミ ラ one, mirror), the 160-protective glasses, the 161-opening, 261～262-protective cover, 263-concave lens, 361-protective cover, the 362-opening, 200-light engine (エ Application ジ Application, engine), 300-projection optics system, 410-light source, the 420-fly's-eye lens, the 430-PBS array, 440-optical modulation element, 450-cross colour splitting prism (cross-dichroic prism, Network ロ ス ダ イ Network ロ イ Star Network プ リ ズ system), 461～466-lens, 471～472-dichronic mirror, and 481～483-catoptron (ミ ラ one, mirror).
Embodiment
Below, with reference to the accompanying drawings the relevant projection-type image display device of embodiments of the present invention is described.In addition, in following accompanying drawing record, give identical or similar symbol to identical or similar part.
Wherein, should be noted that accompanying drawing is a synoptic diagram, the ratio of each size etc. are different with the ratio of reality.Thereby needs such as concrete size are judged with reference to following explanation.In addition, also comprise mutual size relationship or the different part of ratio each other certainly at accompanying drawing.
[first embodiment]
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of first embodiment.
Fig. 1 is the figure (front elevation) of structure of the porjection type display system 100 of expression first embodiment.
Fig. 2 is the figure (side view) of structure of the porjection type display system 100 of expression first embodiment.
As shown in Figures 1 and 2, porjection type display system 100 has: main part 10, base portion 20 and projection-type image display device 30.
Projection-type image display device 30 has: video photogenerated portion 40, projection lens 41, aspheric mirror 50 and protective cover 60.Projection-type image display device 30 is set at the top of main part 10.At this, projection lens 41 and aspheric mirror 50 constitute projection optics system 300 (with reference to Fig. 3) as described later.
In addition, in the first embodiment, projection-type image display device 30 is set at the top of main part 10, but is not to be defined in this.
Particularly, porjection type video display system 30 also can be set at the bottom of main part 10.At this moment, projection-type image display device 30 is with the state configuration after reversing up and down.
In addition, projection-type image display device 30 also can be set at the left part or the right part of main part 10.At this moment, the state configuration of projection-type image display device 30 after with about half-twist.
As shown in Figure 3, projection-type image display device 30 is made of video photogenerated portion 40 and projection optics system 300.In Fig. 3, should be noted that and omitted protective cover 60.Video photogenerated portion 40 has power circuit (not shown), video processing circuit (not shown) etc. except that light engine 200.
As shown in Figure 3, light engine 200 has: light source 410, a pair of fly's-eye lens (fly eye lens) 420, PBS array 430, a plurality of optical modulation element 440 (optical modulation element 440R, optical modulation element 440G and optical modulation element 440B) and cross colour splitting prism 450.
Each fly's-eye lens 420 is made of the micro lens group, the light homogenization that light source 410 is emitted.
Optical modulation element 440 is elements of each colour content light being modulated according to vision signal.Optical modulation element 440 for example is a liquid crystal panel etc.
450 pairs of light that penetrate from each optical modulation element 440 of cross colour splitting prism synthesize.Particularly, the redness that penetrate from optical modulation element 440R of 450 pairs of cross colour splitting prisms become beam split and the blueness that penetrates from optical modulation element 440B becomes beam split to reflect.On the other hand, cross colour splitting prism 450 makes the light transmission that penetrates from optical modulation element 440G.In addition, should be noted that the light that synthesizes by cross colour splitting prism 450, incide projection lens 41.
Catoptron 471 is that blueness is become beam split to reflect and allows the red dichronic mirror that becomes beam split and green composition light transmission.Catoptron 472 is to become beam split to reflect to green and allow the dichronic mirror of red composition light transmission.
The beam split of 481 pairs of blue one-tenth of catoptron is reflected and is become beam split to guide to optical modulation element 440B blueness.The beam split of 483 pairs of red one-tenth of catoptron 482 and catoptron is reflected and is become beam split to guide to optical modulation element 440R redness.
In addition, in the first embodiment, use the UHP lamp as light source 410, but be not to be defined in this.Particularly, use the solid light source of LED (Light Emitting Diode) or LD (LaserDiode) etc. also can as light source 410.At this moment, also consider not use the structure of the optical system of fly's-eye lens 420, PBS array 430, a plurality of lens combination and a plurality of reflector group.
As shown in Figure 3, projection optics system 300 has projection lens 41 and aspheric mirror 50.Projection lens 41 will shine aspheric mirror 50 sides by the cross colour splitting prism 450 synthetic light (video light) that are arranged on light engine 200.The video light wide-angleization that aspheric mirror 50 is emitted with projection lens 41, and make video light reflex to screen 11 sides.
In addition, in first embodiment, the catoptron that is provided with in the back level of projection optics system 300 is an aspheric mirror 50, but is not to be defined in this.Particularly, also free form surface mirror of the catoptron that is provided with in the back level of projection optics system 300.
Turn back to Fig. 2, protective cover 60 is set on the light path of the video light that is reflected by aspheric mirror 50.Particularly, protective cover 60 be set at projection-type image display device 30 below, can not touch the mode of aspheric mirror 50 according to the user, the below of aspheric mirror 50 is covered.Protective cover 60 is made of photopermeability materials such as transparent resin or glass, and makes the video light transmission by aspheric mirror 50 reflections.
At this, the optical characteristics (refractive index etc.) that shines the video light on the screen 11 owing to the kind corresponding to the photopermeability material that constitutes protective cover 60 changes, so, as preferably, consider that the kind of the photopermeability material of formation protective cover 60 is carried out the optical design of projection optics system 300.
(effect and effect)
According to the projection-type image display device 30 of first embodiment,, make the variations such as angle of aspheric mirror 50 so can suppress the user to touch aspheric mirror 50 owing to protective cover 60 is arranged on the light path of the video light that reflects by aspheric mirror 50.Protective cover 60 is made of the photopermeability material of the video light transmission that aspheric mirror 50 is reflected, and protective cover 60 can not hinder the video light that shines on the screen 11 thus.Thereby, can keep well in order to seek to shorten the configuration precision of the set catoptron of distance between projection-type image display device 30 and the screen 11.
[second embodiment]
Below, with reference to accompanying drawing second embodiment is described.Below, with reference to accompanying drawing the difference between above-mentioned first embodiment and second embodiment is described.
Particularly, in the above-described first embodiment, be used to protect the protective cover 60 of aspheric mirror 50 to constitute by the photopermeability material.With respect to this, in second embodiment, protective cover 160 has makes the opening that is passed through by the video light behind aspheric mirror 50 optically focused.In addition, protective cover 160 does not need to be made of the photopermeability material.
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of second embodiment.Fig. 4 is the figure of structure of the porjection type display system 100 of expression second embodiment.In addition, among Fig. 4, should be noted that and give identical symbol the structure identical with Fig. 2.As shown in Figure 4, porjection type display system 100 has protective cover 160 replacement protective covers 60.
(structure of aspheric mirror and protective cover)
Below, with reference to Fig. 5～Fig. 7 the aspheric mirror of second embodiment and the structure of protective cover are described.
As shown in Figure 5, aspheric mirror 50 has along the flexure plane 51 of the left and right directions bending of the above-below direction of porjection type display system 100 and porjection type display system 100.By the video light of flexure plane 51 reflection of aspheric mirror 50, optically focused projects on the screen 11 behind caustic surface a.At this, so-called caustic surface a is meant that the dispersing of light beam of video light becomes minimum face.
Particularly, as shown in Figure 6, on caustic surface a, by the video light of flexure plane 51 reflection of aspheric mirror 50, optically focused is to the regional b with given shape corresponding with the shape of the flexure plane 51 of aspheric mirror 50.In addition, among Fig. 6,, regional b is expressed as the zone with elliptical shape, but should be noted that the shape of regional b is actually complicated shape for easy.
Particularly, as shown in Figure 7, in protective cover 160, be provided with and given shape corresponding opening 161 at the video light of regional b optically focused.It is big that the size of opening 161 goes up the size of regional b of video light optically focused than caustic surface a at least.In addition, as long as can make video light transmission by flexure plane 51 reflection of aspheric mirror 50, the shape of opening 161 also can be shape arbitrarily.
In addition, in order to reduce the size of opening 161, preferably opening 161 is arranged on caustic surface a near.At this, near the distance that the so-called caustic surface a is span caustic surface a is that " d " is with interior scope.In addition, " d " is illustrated on the chief ray by the light at the center of optical modulation element 440, the distance between aspheric mirror 50 and the caustic surface a.
(effect and effect)
According to the projection-type image display device 30 of second embodiment,, the opening 161 that is provided with at protective cover 160 can be reduced because aspheric mirror 50 arrives regional b with projection lens 41 emitted video light optically focused on caustic surface a.Thus, even opening 161 is set, also can suppress the possibility that the user touches aspheric mirror 50 at protective cover 160.
In addition, under the regional situation about constituting of seeing through of protective cover 160, need carry out the optical design of projection optics system 300 according to the kind of photopermeability material by the photopermeability material.With respect to this, according to the projection-type image display device 30 of second embodiment, because the zone that sees through of protective cover 160 is an opening 161, thus need not consider the kind of photopermeability material, thus the light word that is easy to carry out projection optics system 300 designs.
[the 3rd embodiment]
Below, with reference to accompanying drawing the 3rd embodiment of the present invention is described.Below, mainly the difference to above-mentioned second embodiment and the 3rd embodiment describes.
Particularly, in the above-described 2nd embodiment, aspheric mirror 50 has along the flexure plane 51 of the left and right directions bending of the above-below direction of porjection type display system 100 and porjection type display system 100.With respect to this, in the 3rd embodiment, aspheric mirror 50 only has along the flexure plane 51 of the above-below direction bending of porjection type display system 100.
In addition, in the above-described 2nd embodiment, in protective cover 160, be provided with opening 161 with given shape corresponding with the shape of the flexure plane 51 of aspheric mirror 50.With respect to this, in protective cover 160, be provided with and have along the left and right directions of porjection type display system 100 opening 161 for the rectangular shape on long limit.
(structure of aspheric mirror and protective cover)
Below, with reference to Fig. 8～Figure 10 the aspheric mirror of the 3rd embodiment and the structure of protective cover are described.
As shown in Figure 8, aspheric mirror 50 only has along the flexure plane 51 of the above-below direction bending of porjection type display system 100.By the video light of flexure plane 51 reflection of aspheric mirror 50, identical with second embodiment, optically focused projects on the screen 11 behind caustic surface a.
Particularly, as shown in Figure 9, on caustic surface a, by the video light of flexure plane 51 reflection of aspheric mirror 50, by optically focused to regional b with given shape corresponding with the shape of the flexure plane 51 of aspheric mirror 50.In addition, among Fig. 9, for easy, it is the zone of the rectangular shape on long limit that regional b is expressed as the left and right directions that has along porjection type display system 100, but should be noted that the shape of regional b is actually complicated shape.
Particularly, as shown in figure 10, in protective cover 160, be provided with and have along the left and right directions of porjection type display system 100 opening 161 for the rectangular shape on long limit.It is big that the size of opening 161 goes up the size of regional b of video light optically focused than caustic surface a at least.In addition, as long as can make video light transmission by flexure plane 51 reflection of aspheric mirror 50, the shape of opening 161 also can be shape arbitrarily.
[the 4th embodiment]
Thus, with reference to accompanying drawing the 4th embodiment is described.Below, mainly the difference to above-mentioned second embodiment and the 4th embodiment describes.
Particularly, in the above-described 2nd embodiment, the video light that penetrates from projection lens 41 only is reflected once.With respect to this, the video light that penetrates from projection lens 41 be reflected repeatedly (three times).
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of the 4th embodiment.Figure 11 is the figure (side view) of structure of the porjection type display system 100 of expression the 4th embodiment.In addition, in Figure 11, should be noted that and give identical symbol the structure identical with above-mentioned Fig. 2.
As shown in figure 11, porjection type display system 100 also has catoptron 70 and catoptron 80 except that structure shown in Figure 2.
(effect and effect)
According to the projection-type image display device 30 of the 4th embodiment, the video light from projection lens 41 penetrates not only reflects by aspheric mirror 50 reflections and by catoptron 70 and catoptron 80.Thereby even the size of the depth direction of projection-type image display device 30 is reduced, projection-type image display device 30 projects on the screen 11 after also the video light that penetrates from projection lens 41 fully can being amplified.
[the 5th embodiment]
Below, with reference to accompanying drawing the 5th embodiment is described.Below, mainly the difference to above-mentioned first embodiment and the 5th embodiment describes.
Particularly, though do not mention especially in the above-described first embodiment, in the 5th embodiment, be provided with effective viewing area of optical modulation element 440 than projection lens 41 more close belows.
(structure of video light ejecting device)
Below, describe with reference to the structure of accompanying drawing the video light ejecting device of the 5th embodiment.Figure 12 is the figure of structure of the video photogenerated portion 40 of expression the 5th embodiment.At this, video photogenerated portion 40 has the structure identical with Fig. 3.In Figure 12, should be noted that structure required in the explanation that only is shown in the 5th embodiment.
As shown in figure 12, in video photogenerated portion 40, be provided with effective viewing area of optical modulation element 440 than projection lens 41 more close belows.Particularly, effective viewing area of optical modulation element 440 is provided with than the more close below of optical axis center L of projection lens 41.
Thus, from the video light of projection lens 41 ejaculations, towards the oblique upper ejaculation of projection lens 41.Thereby, will reflex to screen 11 (not shown Figure 12) aspheric mirror 50 of side from the video light that projection lens 41 penetrates and be set at the oblique upper of projection lens 41.
(effect and effect)
According to the 5th embodiment, owing to be provided with effective viewing area of optical modulation element 440 than projection lens 41 more close belows, so the video light that penetrates from projection lens 41 just penetrates towards the oblique upper of projection lens 41.Thereby, owing to can realize the more inclination projection of wide-angleization, can further shorten the distance between projection-type image display device and the screen thus.
[the 6th embodiment]
Below, with reference to accompanying drawing the 6th embodiment is described.The 6th embodiment is the embodiment after first embodiment and the combination of the 5th embodiment.
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of the 6th embodiment.Figure 13 is the figure (side view) of structure of the porjection type display system 100 of expression the 6th embodiment.In addition, among Figure 13, should be noted that giving identical symbol with above-mentioned Fig. 2 same structure.
As shown in figure 13, in porjection type display system 100, protective cover 261 and protective cover 262 are set according to the mode that covers projection lens 41 and aspheric mirror 50.Protective cover 262 be arranged on caustic surface a near, constitute by the photopermeability material.Protective cover 262 has can be made with the shape of the flexure plane 51 of aspheric mirror 50 is corresponding and the shape that optically focused becomes the light beam of given shape to see through.In addition, as long as can make video light transmission by flexure plane 51 reflection of aspheric mirror 50, the shape of protective cover 262 also can be shape arbitrarily.
In addition, protective cover 261 need not be made of the photopermeability material certainly.Aspheric mirror 50 is maintained at the inboard of protective cover 261 by the maintaining body of the inboard that is arranged on protective cover 261.
[the 7th embodiment]
Below, with reference to accompanying drawing the 7th embodiment is described.The 7th embodiment is the embodiment after second embodiment and the combination of the 5th embodiment.
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of the 7th embodiment.Figure 14 is the figure (side view) of structure of the porjection type display system 100 of expression the 7th embodiment.In addition, in Figure 14, should be noted that and give identical symbol the structure identical with above-mentioned Fig. 4.
As shown in figure 14, in porjection type display system 100, protective cover 361 is set according to the mode that covers projection lens 41 and aspheric mirror 50.Protective cover 361 has opening 362 near caustic surface a.Opening 362 has can be made with the shape of the flexure plane 51 of aspheric mirror 50 is corresponding and the shape that optically focused becomes the light beam of given shape to see through.In addition, as long as can make video light transmission by the reflection of the flexure plane of aspheric mirror 50, the shape of opening 362 also can be shape arbitrarily.
In addition, aspheric mirror 50 is maintained at the inboard of protective cover 361 by the maintaining body of the inboard that is arranged on protective cover 361.
[the 8th embodiment]
Below, with reference to accompanying drawing the 8th embodiment is described.Below, mainly the difference to above-mentioned the 6th embodiment and the 8th embodiment describes.
Particularly, in the above-described 6th embodiment, will be arranged on by the protective cover 262 that the photopermeability material constitutes caustic surface a near.With respect to this, in the 8th embodiment, the concave lens that is used to video light is throwed in the mode of further wide-angleization be set at caustic surface a near.Particularly, concave lens in distance caustic surface a is the scope of " d " preferred disposition than more close screen 11 sides of caustic surface a.
(structure of porjection type display system)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of the 8th embodiment.Figure 15 is the figure (side view) of structure of the porjection type display system 100 of expression the 8th embodiment.In addition, in Figure 15, should be noted that and give identical symbol the structure identical with above-mentioned Figure 13.
As shown in figure 15, in porjection type display system 100, the protective cover 262 that concave lens 263 replacements are made of the photopermeability material is set.
In addition, in the 8th embodiment, be configured for video light is projected projection optics system 300 on the screen 11 by projection lens 41, aspheric mirror 50 and concave lens 263.
In addition, in the 8th embodiment, utilize concave lens 263 to replace protective cover 262, but be not to be defined in this.Particularly, also can use non-spherical lens or free-form surface lens to replace protective cover 262.
Like this, owing near caustic surface a, be provided with concave lens 263, so, compare with the 6th embodiment, can further shorten the distance between projection-type image display device and the screen.
[the 9th embodiment]
Below, with reference to accompanying drawing the 9th embodiment is described.Below, mainly the difference to above-mentioned the 7th embodiment and the 9th embodiment describes.
Particularly, in the above-described 7th embodiment, projection optics system 300 is made of projection lens 41 and aspheric mirror 50.With respect to this, in the 9th embodiment, projection optics system 300 does not have projection lens 41, and is made of a plurality of reflector group.
(structure of projection type image display apparatus)
Below, describe with reference to the structure of accompanying drawing the porjection type display system of the 9th embodiment.Figure 16 is the figure (side view) of structure of the porjection type display system 100 of expression the 9th embodiment.In addition, in Figure 16, should be noted that and give identical symbol the structure identical with above-mentioned Figure 14.
As shown in figure 16, in porjection type display system 100, be provided with a plurality of reflector group (catoptron 151～catoptron 155) and replace projection lens 41 and aspheric mirror 50.At this, should be noted that by catoptron 151～catoptron 155 to constitute projection optics system 300.
In the 9th embodiment, catoptron 151, catoptron 152, catoptron 154 and catoptron 155 are concave lens, and catoptron 153 is convex lens.But the combination of catoptron is not to be defined in this certainly.
In the 9th embodiment, near caustic surface a, be provided with opening 362, but be not to be defined in this.Particularly, also can be as the 6th embodiment, will be arranged on by the protective cover 262 that the photopermeability material constitutes caustic surface a near.Also can be as the 8th embodiment, with concave lens 263 be arranged on caustic surface a near, 263 pairs of video light that reflected by the catoptron 155 of the last level that is arranged on projection optics system 300 of this concave lens carry out optically focused.
[other embodiments]
By above-mentioned embodiment the present invention has been described, but has constituted the argumentation and the accompanying drawing of the part of the disclosure, not should be understood to be used to limit this invention.To those skilled in the art, can know various replacement embodiments, embodiment and application technology according to the disclosure.
For example, in the above-described first embodiment, all the constituting of protective cover by the photopermeability material, but be not with respect to this.Particularly, as long as have the zone that sees through of the video light transmission that is used to make behind aspheric mirror 50 optically focused, and only see through the zone and constitute by the photopermeability material and get final product.Because aspheric mirror 50 makes video light optically focused,, be easy to obtain to be used to constitute the photopermeability material that sees through the zone thus so the size that sees through the zone can be reduced.
In second embodiment and the 3rd embodiment, the shape that is arranged on the opening 161 of protective cover 160 is an elliptical shape and along the left and right directions of porjection type display system 100 rectangular shape for long limit, but is not to be defined in this.Particularly, the shape that is arranged on the opening 161 of protective cover 160 is according to being decided by the shape of the video light (regional b) of aspheric mirror 50 optically focused on caustic surface a.
In second embodiment～the 8th embodiment, as will reflexing to the catoptron of screen 11 sides and use aspheric mirror, but be not to be defined in this from the video light that projection lens 41 penetrates.Particularly, as reflexing to the catoptron of screen 11 sides, also can use the free form surface mirror from the video light that projection lens 41 penetrates.Under the situation that aberration and resolution are studied, also can use spherical mirror as the catoptron that will reflex to screen 11 sides from the video light that projection lens 41 penetrates.
According to each embodiment, as described above,, catoptron can shorten distance between projection-type image display device and the screen by being set.Thereby, can be suppressed at and swarm into people etc. between projection-type image display device and the screen and video light is interdicted.In addition, using under the situation of LD as light source 410, can reduce the possibility that laser (video light) shines the people.
In the above-described embodiment, though the front projection type display system of the screen that uses reflection-type has been carried out illustration, also can use transmission-type screen.
Claims (2)
1. a projection-type image display device possesses: the video photogenerated portion that is used to generate video light; With the projection optics system that above-mentioned video light is projected on the screen,
Above-mentioned projection optics system has the catoptron that the above-mentioned video light that will penetrate from above-mentioned video photogenerated portion reflexes to above-mentioned screen side,
Above-mentioned catoptron makes the emitted above-mentioned video light optically focused between above-mentioned catoptron and above-mentioned screen of above-mentioned video photogenerated portion,
Above-mentioned projection-type image display device also possesses the protective cover that is provided with on the light path by the above-mentioned video light of above-mentioned mirror reflects,
Above-mentioned protective cover has and is configured in by above-mentioned catoptron near the position of above-mentioned video light optically focused and make the zone that sees through by the above-mentioned video light transmission of above-mentioned mirror reflects.
2. a porjection type display system possesses: screen; Be used to generate the video photogenerated portion of video light; With the projection optics system that above-mentioned video light is projected on the above-mentioned screen,
Above-mentioned projection optics system has the catoptron that the above-mentioned video light that will penetrate from above-mentioned video photogenerated portion reflexes to above-mentioned screen side,
Above-mentioned catoptron makes the emitted above-mentioned video light optically focused of above-mentioned video photogenerated portion between above-mentioned catoptron and above-mentioned screen,
Above-mentioned porjection type display system also possesses the protective cover that is provided with on the light path by the above-mentioned video light of above-mentioned mirror reflects,
Above-mentioned protective cover has and is configured in by above-mentioned catoptron near the position of above-mentioned video light optically focused and make the zone that sees through by the above-mentioned video light transmission of above-mentioned mirror reflects.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
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| JP2006269965 | 2006-09-29 | ||
| JP2006-269965 | 2006-09-29 | ||
| JP2006269965 | 2006-09-29 | ||
| JP2007228102A JP4467609B2 (en) | 2006-09-29 | 2007-09-03 | Projection display apparatus and projection display system |
| JP2007228102 | 2007-09-03 | ||
| JP2007-228102 | 2007-09-03 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101231749A Division CN101776838B (en) | 2006-09-29 | 2007-09-28 | Projection type video display device |
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| CN101154025A CN101154025A (en) | 2008-04-02 |
| CN101154025B true CN101154025B (en) | 2010-09-15 |
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| CN2007101531366A Active CN101154025B (en) | 2006-09-29 | 2007-09-28 | Projection-type image display device and projection-type image display system |
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| JP (3) | JP2009276790A (en) |
| CN (1) | CN101154025B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5561087B2 (en) * | 2010-10-14 | 2014-07-30 | 株式会社リコー | Image projection device |
| US8950874B2 (en) * | 2011-09-16 | 2015-02-10 | Ricoh Company, Ltd. | Projection optical system and image display apparatus |
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| CN101086605A (en) * | 2006-06-08 | 2007-12-12 | 株式会社日立制作所 | Projection type image display device |
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| JPH0530849U (en) * | 1991-09-30 | 1993-04-23 | 株式会社ワコム | Desktop display |
| JPH05100312A (en) * | 1991-10-09 | 1993-04-23 | Seiko Epson Corp | Projection type display device |
| JP2786796B2 (en) * | 1993-06-23 | 1998-08-13 | シャープ株式会社 | projector |
| JPH08238956A (en) * | 1995-03-06 | 1996-09-17 | Nippondenso Co Ltd | Head-up display device |
| JP3598009B2 (en) * | 1998-12-28 | 2004-12-08 | 京セラ株式会社 | Liquid crystal display device and liquid crystal projector display device using the same |
| JP4016007B2 (en) * | 1999-07-14 | 2007-12-05 | Ｎｅｃディスプレイソリューションズ株式会社 | Imaging optics |
| JP3727543B2 (en) * | 2000-05-10 | 2005-12-14 | 三菱電機株式会社 | Image display device |
| JP2002341288A (en) * | 2001-05-15 | 2002-11-27 | Nec Viewtechnology Ltd | Projection device |
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| JP2004286815A (en) * | 2003-03-19 | 2004-10-14 | Hitachi Ltd | Projector |
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| JP2006133273A (en) * | 2004-11-02 | 2006-05-25 | Olympus Corp | Projection type display system |
| JP4890771B2 (en) * | 2005-02-28 | 2012-03-07 | 富士フイルム株式会社 | Projection optical system and projection display device using the same |
| JP2008070694A (en) * | 2006-09-15 | 2008-03-27 | Seiko Epson Corp | Projection system |
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| CN101086605A (en) * | 2006-06-08 | 2007-12-12 | 株式会社日立制作所 | Projection type image display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4467638B2 (en) | 2010-05-26 |
| CN101154025A (en) | 2008-04-02 |
| JP5162570B2 (en) | 2013-03-13 |
| JP2009276790A (en) | 2009-11-26 |
| JP2009276789A (en) | 2009-11-26 |
| JP2010122696A (en) | 2010-06-03 |
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