CN101097396A - Screen, projector, and image display device - Google Patents

Screen, projector, and image display device Download PDF

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Publication number
CN101097396A
CN101097396A CNA2007101089192A CN200710108919A CN101097396A CN 101097396 A CN101097396 A CN 101097396A CN A2007101089192 A CNA2007101089192 A CN A2007101089192A CN 200710108919 A CN200710108919 A CN 200710108919A CN 101097396 A CN101097396 A CN 101097396A
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China
Prior art keywords
screen
diffusion layer
light
diffuser plate
plate
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Pending
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CNA2007101089192A
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Chinese (zh)
Inventor
木下悟志
守国荣时
真保晃
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Seiko Epson Corp
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Seiko Epson Corp
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Publication of CN101097396A publication Critical patent/CN101097396A/en
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Abstract

A screen includes; a plurality of layers including a diffusion layer that diffuses incident tight; an elastic member that movably supports the diffusion layer with respect to an arbitrary holding part; and a driving unit that moves the diffusion layer in a direction perpendicular to an optical axis of light that is incident to the diffusion layer.

Description

Screen, projector and image display device
Technical field
The present invention relates to screen, projector and image display device.
Background technology
In this manual, the left and right directions when the angle of looking the hearer is observed is represented in the narration of left and right directions.
In the past, particularly rear projection type throws employed screen and is generally 2 layers of structure, comprise: become the Fresnel lens that penetrates light and will be from the ejaculation light of this Fresnel lens bi-convex lens sheet (diverging lens sheet) to left and right directions (horizontal direction) diffusion of screen thereby will inject the direction of light parallelization.Under the situation of this structure, have following problems: on screen, the laser beam that penetrates from same light source produces interference each other, thereby whole generation of screen seems dazzling flicker, perhaps produces the phenomenon that is called hot spot.Therefore, proposed to be used to relax the screen (for example, opening 2003-262920 communique and special table 2002-543455 communique) of this interference with reference to the spy.
The spy opens the described rear projection type display apparatus of 2003-262920 communique and comprises: projection type image display apparatus in the enclosure is set, thus catoptron that the projection light from projection type image display apparatus is reflected and the rear projection screen of accepting the projection light display image.And, be provided with the plane actuator at the back side of catoptron, by making this plane actuator vibration, can reduce hot spot on the whole at rear projection screen.
In addition, the described porjection type display of special table 2002-543455 communique comprises: light valve, refrative mirror, projection lens, and projection screen; Make wherein any one vibration with the invisible fully high frequency of user, the hot spot that carries out thus on the display is handled.
But, open in the described rear projection type display apparatus of 2003-262920 communique above-mentioned spy, just reduce flicker in the optical system on projecting image onto screen, so, be difficult to suppress reliably flicker for the interference that on screen, produces as imaging surface.
In addition, show in the described porjection type display of 2002-543455 communique, though mechanically make the projection screen vibration the spy, but just merely make the screen vibration, so image is moved, looking the hearer, can produce the horizontal swing of image or the swing of focus etc.
Summary of the invention
The present invention finishes in order to solve the above problems, and its purpose is to provide a kind of screen, projector and image display device that can reduce flicker, show distinct image.
The invention provides a kind of screen, it comprises: a plurality of layers that comprise the diffusion layer that makes the light diffusion of injecting; With described diffusion layer support the elastic component that can move with respect to maintaining part arbitrarily; With the driver element that described diffusion layer is moved on the direction vertical with the optical axis of the light of injecting this diffusion layer.
In screen of the present invention, by maintaining part diffusion layer can be moved via elastic component, so by making drive unit drives, diffusion layer moves on the direction vertical with the optical axis of the light of injecting.Thus, transmission cross diffusion layer, the disperse state time to time change of the light that penetrates from diffusion layer.Therefore, transmission is crossed the spot pattern of light of pervasion component because afterimage effect and integration in time, its result, and the light that penetrates from screen becomes the light that has suppressed flicker, can show preferable image.
In addition, owing between maintaining part and diffusion layer, be provided with elastic component, so the power that offers diffusion layer by driver element passes to elastic component via diffusion layer.The power that is delivered to elastic component is rebounded by maintaining part, is delivered to diffuser plate once more by the elastic force of elastic component.Thus, diffusion layer, is swung on the direction vertical with optical axis in maintaining part by the power that provides from driver element and the elastic force of elastic component.Like this, diffusion layer moves (swing is waved) on the direction vertical with the optical axis of the light of injecting this diffusion layer, so can not move on optical axis direction.Therefore, the image blurring generation that the change by focus causes can be suppressed, distinct image can be shown.
In addition, in screen of the present invention, preferably, described driver element drives described diffusion layer off and on.
In screen of the present invention, on diffusion layer, be provided with the rubber-like elastic component, so only vibrate off and on diffusion layer is swung continuously by driver element.Like this, because diffusion layer is swung continuously,,, can reduce flicker efficiently so additional waste energy ground does not apply continuous motion to diffusion layer effectively so needn't make drive unit drives always.
In screen of the present invention, preferably, described elastic component comprises at least one telescoping member that links described maintaining part and described diffusion layer; By this telescoping member, described diffusion layer is suspended on the described maintaining part.
In screen of the present invention, elastic component is a telescoping member, so diffusion layer is suspended on the maintaining part by for example suspension strop.Thus, degree of freedom height, diffusion layer become the state of easy swing, so very little even offer the power of diffusion layer by driver element, diffusion layer also can swing efficiently on the direction vertical with the optical axis of the light of injecting this diffusion layer.Therefore, can reduce flicker more efficiently by simple structure.
In addition, in screen of the present invention, preferably, on described diffusion layer, the elastic force of described elastic component be applied to respectively on the predetermined direction in the diffusingsurface of described diffusion layer and the direction of intersecting with this predetermined direction on.
In screen of the present invention, on diffusion layer, the elastic force of elastic component be applied to respectively on the predetermined direction in the diffusingsurface of diffusion layer and the direction of intersecting with this predetermined direction on, so easier being delivered on the elastic component of power that is delivered on the elastic component, rebounds by maintaining part.Thus, the elastic force of elastic component is delivered to diffusion layer once more, so diffusion layer is easily along circular orbit, elliptical orbit or 8 word track wobbles.Therefore, diffusion layer is swung continuously, so there is not dead point (the instantaneous point that stops to move), can not exist so produce the moment of interfering in a flash.The hot spot that therefore, can suppress flicker (flicker of the image on the screen).
In addition, in screen of the present invention, preferably, comprise the limiting member that moves to the optical axis direction of the light of injecting of the described diffusion layer of restriction.
In screen of the present invention,, limited the moving to the optical axis direction of the light of being injected of diffusion layer by comprising limiting member.Thus, the image blurring generation that the change by the focus that makes diffusion layer when swing causes can be suppressed reliably, distincter image can be shown.
In addition, in screen of the present invention, preferably, in described a plurality of layer, be configured to other layers adjacent with described diffusion layer with the right face of described diffusion layer phase on, be provided with the contact site that contacts and implemented rounding or chamfering with described diffusion layer phase.
In screen of the present invention, when other layers contact with diffusion layer phase, other layers with the right face of diffusion layer phase on be provided with contact site, so when diffusion layer is swung, can prevent the damage of diffusion layer.In addition, rounding or chamfering on the contact site of other layers, have been implemented, so can suppress the wearing and tearing that cause by other layers and contacting of diffusion layer.
In addition, in screen of the present invention, preferably, described driver element is the actuator that moves back and forth.
In screen of the present invention, as driver element, can use for example small-sized solenoid, so can realize the miniaturization of screen integral body.
In addition, in screen of the present invention, preferably, described driver element is the actuator that is rotated motion.
In screen of the present invention, driver element is the actuator that is rotated motion, so can suppress noise and generation of vibration.Therefore, can provide the higher screen of noise, quietness that prevents to be accompanied by the driving of driver element and produce.
In addition, the invention provides a kind of projector, it comprises: the light supply apparatus that penetrates light; According to the optic modulating device of picture signal to modulating from the light of this light supply apparatus ejaculation; The grenade instrumentation that light by the modulation of this optic modulating device is throwed; With the above-mentioned screen that image throwed that penetrates from this grenade instrumentation.
In projector of the present invention, inject optic modulating device from the light that light supply apparatus penetrates.Then, the image by the optic modulating device modulation is incident upon on the screen by grenade instrumentation.At this moment, use be to have reduced flicker, suppressed the screen of image blurring generation simultaneously, so do not have brightness disproportionation from the screen image projected, can the display quality preferable image.
In addition, the invention provides a kind of image display device, it comprises: the light supply apparatus that penetrates light; Make the scanning element that scans from the light of this light supply apparatus ejaculation; With the described screen that light throwed by this scanning element scanning.
In image display device of the present invention, the light that penetrates from light supply apparatus scans by scanning element.Then, the light after being scanned by scanning element is projected on the screen.At this moment, use is to have reduced flicker, suppressed the screen of image blurring generation simultaneously, so the light that penetrates from screen has been suppressed the generation of flicker.Therefore, can show do not have brightness disproportionation, the second best in quality image.
In addition, the invention provides a kind of screen, it has a plurality of layer, comprising: constitute one deck at least in described a plurality of layer, make the diffusion layer of the light diffusion of injecting; Be arranged on image forming area in this diffusion layer outer, with described diffusion layer support the supporting member that can move; With the driver element that described diffusion layer is moved continuously.
In screen of the present invention, by making drive unit drives, the diffusion layer swing.Thus, transmission cross diffusion layer, the disperse state time to time change of the light that penetrates from diffusion layer.Therefore, transmission is crossed the spot pattern of light of pervasion component because afterimage effect and integration in time, its result, and the light that penetrates from screen becomes the light that has suppressed flicker, can show preferable image.
In addition, owing to outside image forming area, support diffusion layer by supporting member,, bring influence can for shown image even supported position is fixed (dead point) yet, can diffusion restriction layer to the moving of optical axis direction, so can show distinct image.
And then, because driver element makes diffusion layer move (swing) continuously,, can not exist so produce the moment of interfering in a flash so there is not dead point (the instantaneous point that stops to move).Therefore, can keep the inhibition effect of the hot spot of flicker (flicker of the image on the screen) continuously.
In addition, in screen of the present invention, preferably, described supporting member be arranged between the maintaining part arbitrarily that keeps described diffusion layer and the described diffusion layer, the rubber-like elastic component; Described diffusion layer is kept by described maintaining part through described elastic component.
In screen of the present invention, between maintaining part and diffusion layer, be provided with elastic component, so the power that offers diffusion layer by driver element passes to elastic component via diffusion layer.The power that is delivered to elastic component is rebounded by maintaining part, is delivered to diffuser plate once more by the elastic force of elastic component.Thus, diffusion layer, is swung on the direction vertical with optical axis in maintaining part by the power that provides from driver element and the elastic force of elastic component.
In addition, in screen of the present invention, preferably, described supporting member comprises and will keep the maintaining part arbitrarily of described diffusion layer and at least one telescoping member that described diffusion layer links up; By this telescoping member, described diffusion layer is suspended on the described maintaining part.
In screen of the present invention, elastic component is a telescoping member, so diffusion layer is suspended on the maintaining part by for example suspension strop.Thus, degree of freedom height, diffusion layer become the state of easy swing, so very little even offer the power of diffusion layer by driver element, diffusion layer also can swing efficiently on the direction vertical with the optical axis of the light of injecting this diffusion layer.Therefore, can reduce flicker more efficiently by simple structure.
In addition, in screen of the present invention, preferably, on described driver element, be provided with the connecting elements that is connected on the described diffusion layer, described diffusion layer can be swung.
In screen of the present invention, diffusion layer connects by the connecting elements that is arranged on the driver element, so the driving of drive division passes to diffusion layer via connecting elements, so easily make the diffusion layer swing.
In addition, in screen of the present invention, preferably, comprise the limiting member that moves to the optical axis direction of the light of injecting of the described diffusion layer of restriction.
In screen of the present invention,, limited the moving to the optical axis direction of the light of being injected of diffusion layer by comprising limiting member.Thus, the image blurring generation that the change by the focus that makes diffusion layer when swing causes can be suppressed reliably, distincter image can be shown.
In addition, in screen of the present invention, preferably, described supporting member is by limiting moving of described diffusion layer at the repulsive force that optical axis direction produced along the light of injecting described diffusion layer.
In screen of the present invention, supporting member comes moving on the optical axis direction of diffusion restriction layer by the repulsive force along the optical axis direction of the light of injecting diffusion layer.Like this, by moving of repulsive force diffusion restriction layer, suppressed the image blurring generation that the change by focus causes thus reliably, increased the degree of freedom of the swing on the direction vertical of diffusion layer simultaneously with optical axis, so can make the diffusion layer swing efficiently with simple structure.
In addition, in screen of the present invention, preferably, described driver element is the actuator that moves back and forth.
In screen of the present invention, as driver element, can use for example small-sized solenoid, so can realize the miniaturization of screen integral body.
In addition, in screen of the present invention, preferably, described driver element is the actuator that is rotated motion.
In screen of the present invention, driver element is the actuator that is rotated motion, so can suppress noise and generation of vibration.Therefore, can provide the higher screen of noise, quietness that prevents to be accompanied by the driving of driver element and produce.
In addition, the invention provides a kind of projector, it comprises: the light supply apparatus that penetrates light; According to the optic modulating device of picture signal to modulating from the light of this light supply apparatus ejaculation; The grenade instrumentation that light by the modulation of this optic modulating device is throwed; With the above-mentioned screen that image throwed that penetrates from this grenade instrumentation.
In projector of the present invention, inject optic modulating device from the light that light supply apparatus penetrates.Then, the image by the optic modulating device modulation is incident upon on the screen by grenade instrumentation.At this moment, use be to have reduced flicker, suppressed the screen of image blurring generation simultaneously, so do not have brightness disproportionation from the screen image projected, can the display quality preferable image.
In addition, the invention provides a kind of image display device, it comprises: the light supply apparatus that penetrates light; Make the scanning element that scans from the laser of this light supply apparatus ejaculation; With the above-mentioned screen that light throwed by this scanning element scanning.
In image display device of the present invention, the light that penetrates from light supply apparatus scans by scanning element.Then, the light after being scanned by scanning element is projected on the screen.At this moment, use is to have reduced flicker, suppressed the screen of image blurring generation simultaneously, so the light that penetrates from screen has been suppressed the generation of flicker.Therefore, can show do not have brightness disproportionation and the second best in quality image.
Description of drawings
Figure 1A, 1B are respectively the stereographic map and the side sectional views of the schematic configuration of the back projecting projector in expression the 1st embodiment of the present invention;
Fig. 2 is the transmission optics system of back projecting projector of expression Figure 1A, 1B and the summary construction diagram of screen;
Fig. 3 is the sectional view of employed screen in the back projecting projector of expression Figure 1A, 1B;
Fig. 4 is the stereographic map of screen of the back projecting projector of expression Figure 1A, 1B;
Fig. 5 is the vertical view of structure of screen of the back projecting projector of expression Figure 1A, 1B;
Fig. 6 is the sectional view of screen of the back projecting projector of expression Figure 1A, 1B;
Fig. 7 schematically shows the sectional view of laser of screen that the back projecting projector of Figure 1A, 1B is crossed in transmission;
Fig. 8 is the sectional view of variation of diffuser plate of screen of the back projecting projector of expression Figure 1A, 1B;
Fig. 9 is the vertical view of the screen in the 2nd embodiment of the present invention;
Figure 10 is the sectional view of the screen in the 3rd embodiment of the present invention;
Figure 11 is the summary construction diagram of the image display device in the 4th embodiment of the present invention;
Figure 12 A, 12B are respectively the stereographic map and the side sectional views of the schematic configuration of the back projecting projector in expression the 5th embodiment of the present invention;
Figure 13 is the transmission optics system of back projecting projector of presentation graphs 12A, 12B and the summary construction diagram of screen;
Figure 14 is the sectional view of employed screen in the back projecting projector of presentation graphs 12A, 12B;
Figure 15 is the stereographic map of screen of the back projecting projector of presentation graphs 12A, 12B;
Figure 16 is the vertical view of structure of screen of the back projecting projector of presentation graphs 12A, 12B;
Figure 17 is the sectional view of screen of the back projecting projector of presentation graphs 12A, 12B;
Figure 18 schematically shows the sectional view of laser of screen that the back projecting projector of Figure 12 A, 12B is crossed in transmission;
Figure 19 is the sectional view of variation of diffuser plate (diffusing panel) of screen of the back projecting projector of presentation graphs 12A, 12B;
Figure 20 is the vertical view of the screen in the 6th embodiment of the present invention;
Figure 21 A～21C is respectively the vertical view of the screen in the 7th embodiment of the present invention, the stereographic map of drive division, the stereographic map of support portion;
Figure 22 is the sectional view of variation of drive division of the screen of presentation graphs 21A～21C;
Figure 23 A, 23B are respectively the vertical view of the screen in the 8th embodiment of the present invention, the sectional view of support portion;
Figure 24 is the sectional view of the screen in the 9th embodiment of the present invention;
Figure 25 is the sectional view of the screen in the 10th embodiment of the present invention;
Figure 26 is the sectional view of variation of the screen of expression Figure 25;
Figure 27 is the summary construction diagram of the image display device in the 8th embodiment of the present invention.
Embodiment
Below, describe with reference to the embodiment of accompanying drawing the screen among the present invention, projector and image display device.In addition, in the accompanying drawing below, be made as the size that to discern, the engineer's scale of each member has been carried out suitable change in order to make each member.
[the 1st embodiment]
Figure 1A is the stereographic map of the schematic configuration of the back projecting projector (projector) 1 in the expression embodiment of the present invention, and Figure 1B is the side sectional view of the back projecting projector 1 shown in Figure 1A.Back projecting projector 1 in the embodiment of the present invention is modulated the light that shoots out from light supply apparatus by light-modulating cell, and the light amplification after will modulating is incident upon on the screen 10.
Shown in Figure 1A, back projecting projector 1 comprises: shell (casing, maintaining part) 2 and being installed on the front surface of shell 2, by the screen 10 of projects images.Be provided with front panel 3 on the part below the screen 10 of shell 2, the left and right sides of plate 3 is provided with the peristome 4 of output from the sound of loudspeaker in front.
Next, the internal structure to the shell 2 of back projecting projector 1 describes.
Shown in Figure 1B, below shell 2 inside of back projecting projector 1, be equipped with projection optics system 20.Be provided with catoptron 5,6 in shell 2 inside, arrive the light path of screens 10 by catoptron 5,6 reflections, be exaggerated from the projection light of projection optics system 20 projections and project on the screen 10 thereby form the light that penetrates from projection optics system 20.
Next, the schematic configuration to the projection optics system 20 of back projecting projector 1 describes.
Fig. 2 is the skeleton diagram of structure of the projection optics system 20 of expression back projecting projector 1.In addition, in Fig. 2, the shell 2 that will constitute back projecting projector 1 for simplification omits.
Projection optics system 20 comprises: red laser light source (light supply apparatus) 21R that penetrates red light, penetrate green laser light source (light supply apparatus) 21G of green light, penetrate blue laser light source (light supply apparatus) 21B of blue light, respectively to from these LASER Light Source 21R, 21G, liquid crystal light valve (optic modulating device) 24R that the laser that 21B penetrates is modulated, 24G, 24B, will be by liquid crystal light valve 24R, 24G, the cross colour splitting prism (coloured light synthesis unit) 26 that laser after the 24B modulation is synthetic and to amplifying the projection lens (grenade instrumentation) 27 of projection by cross colour splitting prism 26 synthetic laser.
Projection optics system 20 comprises lamp optical system 22R, 22G, 22B, uniform illumination system as the Illumination Distribution homogenising that is used to make the laser that penetrates from LASER Light Source 21R, 21G, 21B, described lamp optical system 22R, 22G, 22B are configured on the ejaculation direction of each LASER Light Source 21R, 21G, 21B, and laser is injected to liquid crystal light valve 24R, 24G, 24B.For example, lamp optical system 22R, 22G, 22B comprise holography, field lens.
In addition, each liquid crystal light valve 24R, 24G, 24B inject side (light incident side) and emitting side, dispose polarization plates (not shown).Thereby, in light beam, only there is the rectilinearly polarized light transmission of predetermined direction to cross and injects the lateral deviation vibration plate from each LASER Light Source 21R, 21G, 21B, inject each liquid crystal light valve 24R, 24G, 24B.In addition, also polarization conversion unit (not shown) can be set in the place ahead of injecting the lateral deviation vibration plate.At this moment, transform the light beam into the light of wanting transmission to cross to inject the lateral deviation vibration plate, can improve the utilization ratio of light thus by the polarization conversion unit.
3 kinds of coloured light by each liquid crystal light valve 24R, 24G, 24B modulation are injected cross colour splitting prism 26.This prism is pasted together 4 right-angle prisms and form, and the surface disposes the dielectric multilayer film of reflection red light and the dielectric multilayer film of reflect blue light with going up crosswise within it.By these dielectric multilayer films that 3 kinds of coloured light are synthetic, form the light of representing coloured image.Then, the light after synthesizing is projected on the screen 10 by the projection lens 27 that is included in the projection optics system, demonstrates enlarged image.
Next, the details to screen 10 describes.
As Fig. 3, shown in Figure 5, screen 10 comprises: screen main body 10a, rubber-like rubber section (elastic component) 17, and drive division (driver element: actuator) 30.
At first, the one-piece construction to screen main body 10a describes.
As shown in Figure 4, the screen main body comprises: the Fresnel plate 11 that the angle of the light injected is changed, have the biconvex plate (diffusion layer) 13 of transmitance, and be configured between Fresnel plate 11 and the biconvex plate 13, make the diffuser plate (diffusion layer) 12 of the light diffusion of injecting.
In addition, as shown in Figure 5, on the front surface of shell 2, be formed with peristome 2a, in this peristome 2a, be provided with diffuser plate 12.And, between the periphery of the internal face 2b of peristome 2a and diffuser plate 12, be provided with gap 2c.
Next, rubber section 17 is described.
Rubber section 17 is a tabular, as shown in Figure 5, between the surperficial 16a on the right of the internal face 2b of shell 2 and diffuser plate 12, possesses the rubber 17a that is provided with in the mode of filling gap 2c.In addition, rubber section 17 also possesses: and rubber 17a similarly is separately positioned between the surperficial 16b on the left side of the internal face 2b of shell 2 and diffuser plate 12, rubber 17b, rubber 17c, rubber 17d between the surperficial 16c of the top of the internal face 2b of shell 2 and diffuser plate 12, between the surperficial 16d of the bottom of the internal face 2b of shell 2 and diffuser plate 12.Thus, the elastic force of rubber 17a, 17b, 17c, 17d is applied on x direction (the predetermined direction in the diffusingsurface of diffuser plate: be provided with the horizontal direction under the state of screen) and the y direction (direction of intersecting with described predetermined direction: be provided with the vertical direction under the state of screen).
In addition, rubber 17a, 17b, 17c, 17d are configured in respectively near the central authorities of each face 16a, 16b, 16c, 16d.Thus, can make diffuser plate 12 swing equably in the peristome 2a of shell 2.
In addition, rubber has been made as tabular, but also can has been the rubber structure that 1 L font is set respectively on angle of diffuser plate 12 and diagonal angle thereof.
Next, the details to screen main body 10a describes.
At first, Fresnel plate 11 is described.
As shown in Figure 3, Fresnel plate 11 roughly is formed with to concentric circles the Fresnel Lenses 11c of prism-like on the outgoing plane 11b relative with injecting face 11a.This Fresnel Lenses 11c makes from projection lens 27 ejaculations, from injecting the laser refraction that face 11a injects, and converts directional light to, penetrates from outgoing plane 11b.
In addition, implemented chamfering at the top of the raised line of Fresnel Lenses 11c.In addition, also can implement rounding at the top of the raised line of Fresnel Lenses 11c.Here said rounding is meant in outgoing plane 11b side to show protruding flexure plane.
Next, biconvex plate 13 is described.
As shown in Figure 3, biconvex plate 13 is being injected on the face 13a, at the lenticular lens elements 13c that side is provided with a plurality of semicircle tubulars that injects of laser.These a plurality of lenticular lens elements 13c are configured to: on the plane vertical with optical axis O (xy plane), length direction and y direction (being provided with the vertical direction under the state of screen) are parallel, and on the x direction side by side.In addition, implemented rounding at the top of lenticular lens elements 13c.In addition, also can implement chamfering at the top of lenticular lens elements 13c.Here said rounding is meant and is injecting the protruding flexure plane of face 13a side demonstration.
And then, biconvex plate 13 makes from injecting laser that face 13a injects and is diffused into predetermined angular range and penetrates from outgoing plane 13b, thereby the field angle of image is enlarged, make position after the front along continuous straight runs from screen 10 moves predetermined angular range observe also to observe good high image.In addition, as the material of biconvex plate 13, so long as the material that light can see through gets final product.
In addition, as the material of Fresnel plate 11 and biconvex plate 13, for example can enumerate thermoplastic resin such as acrylic resin, polycarbonate resin, polyvinyl chloride resin or cycloolefin resinoid etc.In addition, preferably have transmitance and have rigidity, and then consider that preferably surperficial mar resistance and against weather select.Thus, can access higher Fresnel plate 11 of reliability and biconvex plate 13.
Next, diffuser plate 12 is described.
As shown in Figure 3, diffuser plate 12 makes the laser diffusion of penetrating from the outgoing plane 11b of Fresnel plate 11, and injects to the face of the injecting 13a of biconvex plate 13.In addition, diffuser plate 12 looses to have in inside and has diffusible particle 12c.Specifically, can use the silicon dioxide, glass, resin etc. of microgranular (pearl).The average particulate diameter of particle 12c is not particularly limited, but is preferably 0.5 μ m～50 μ m.
In addition, as the material of diffuser plate, can enumerate for example cycloolefin resinoid.
In addition, as shown in Figure 6, the thickness L of diffuser plate 12 be made as Fresnel plate 11 and the gap 15 of biconvex plate 13 interval M roughly 2/3.In addition, the thickness L of diffuser plate 12 is preferably interval M over half in gap 15.By this structure, diffuser plate 12 can not depart from the amount of the thickness L of this diffuser plate 12 on optical axis O direction between Fresnel plate 11 and biconvex plate 13, so this diffuser plate 12 can crooked/lax (relaxation む).
Promptly, thickness L by this diffuser plate 12, move in the gap 15 of broad with the official post diffuser plate 12 below the certain width, diffuser plate 12 can not depart from more than the certain distance on the focus direction thus, the confusion image that causes so can not produce fuzzy by focus.In addition, by this gap 15, can limit moving of diffuser plate 12, even so when diffuser plate 12 is thin (thickness: 0.5mm for example, size: tens of inches), also can not use the retaining member that keeps diffuser plate 12, on one side and diffuser plate 12 is not stretched agley, Yi Bian move it.
In addition, thus, can reduce the quality of diffuser plate 12, thus diffuser plate 12 is moved simply, and then can realize the miniaturization of the integral body of screen 10.
Diffuser plate 12 has been implemented static and has been prevented to handle on the face of injecting shown in Figure 6 (face relative with the Fresnel plate) 12a and outgoing plane (face relative with the biconvex plate) 12b.
In addition, Fresnel plate 11, biconvex plate 13, diffuser plate 12 are formed by the plastic material that acryl resin etc. constitutes respectively.Thus, can realize the lightness of screen 10 integral body.Particularly, diffuser plate 12 is owing to the member that will become vibration needs lightness.But,, can produce electrostatic force, the bigger resistance when becoming diffuser plate 12 vibrations owing to form diffuser plate 12 by plastic material.At this moment, prevent to handle, can reduce the resistance that causes by electrostatic force by on the face of the injecting 12a of diffuser plate 12 and outgoing plane 12b, implementing static.Prevent the method handled as static, can sneak into static in the inside of plastic material and prevent treating agent, also can prevent treating agent at surface coated static.
Next, drive division 30 is described.
As shown in Figure 5, on screen 10, be provided with the drive division 30 that itself is rotated motion, makes diffuser plate 12 swings.The concrete structure of drive division 30 is, is arranged on lower surface 16d one side of diffuser plate 12, via rubber section 17 diffuser plate 12 can be swung abreast with respect to outgoing plane (diffusingsurface) 12b of this diffuser plate 12.In addition, this drive division 30 drives off and on, and diffuser plate 12 is vibrated continuously.Drive division 30 makes that diffuser plate 12 is gone up in the direction (xy in-plane) parallel with the outgoing plane 12b of laser diffusion, i.e. vibration continuously on the direction vertical with the optical axis O of laser shown in Figure 3.In addition, make the frequency of diffuser plate 12 vibration be set can perception than the people the flicker frequency height.
In addition, as shown in Figure 5, drive division 30 comprises that with central shaft P be the discoid drive plate 32 that the center turns clockwise.As shown in phantom in Figure 5, diffuser plate 12 can contact with drive plate 32, when the face 16d of diffuser plate 12 contacts with drive plate 32, pushes diffuser plate 12 to sense of rotation (top), and it is swung along circular orbit.
In addition, also can make diffuser plate 12, also can make diffuser plate in addition along 8 font track wobbles along the elliptical orbit swing.
Next, to the back projecting projector 1 by the present embodiment that constitutes by above-mentioned structure and the method for image projection on screen 10 described.
At first, as shown in Figure 2, the laser that penetrates from each LASER Light Source 21R, 21G, 21B makes roughly homogenising of Illumination Distribution by lamp optical system 22R, 22G, 22B respectively, injects liquid crystal light valve 24R, 24G, 24B.Thereby the laser of injecting is modulated by liquid crystal light valve 24R, 24G, 24B respectively, injects cross colour splitting prism 26.Then, R light, G light and the B light compositing that will be modulated by each transmissive liquid crystal light valve 24R, 24G, 24B respectively of cross colour splitting prism 26.Project on the screen 10 by projection lens 27 by cross colour splitting prism 26 synthetic light.
If advancing of laser illustrated to show, as shown in Figure 7, the laser that is projected onto on the screen 10 is injected from the face of the injecting 11a of Fresnel plate 11, by Fresnel Lenses 11c refraction, forms directional light.Then, to the random direction diffusion, the face of the injecting 13a from biconvex plate 13 injects the directional light that penetrates from the outgoing plane 11b of Fresnel plate 11 by the light after spreading by diffuser plate 12.Then, the light that penetrates from biconvex plate 13 is spread in predetermined angular range.At this moment, as shown in Figure 5, when diffuser plate 12 contacts with drive plate 32, be accompanied by the rotation of drive plate 32, diffuser plate 12 is pushed to the top, and then, diffuser plate 12 moves, and leaves drive plate 32.That is, the power that offers diffuser plate 12 is passed on the rubber 17c on the face 16c that is arranged on the top, and is rebounded by the inner wall surface 2b of shell 2, is delivered to diffuser plate 12 once more by the elastic force of rubber 17c.Simultaneously, the power that offers diffuser plate 12 is delivered to rubber 17b, 17d, 17a, so as shown in Figure 5, diffuser plate 12 is swung along circular orbit.
Then, when the decay of the swing of predetermined amount was carried out, shown in the dotted line of Fig. 5, diffuser plate 12 contacted with drive plate 32, so be pushed to the top once more.
In the back projecting projector 1 in the present embodiment, be provided with rubber section 17, so rubber 17a, 17b on each face 16a of the diffuser plate 12 of screen main body 10a by being arranged on this diffuser plate 12,16b, 16c, the 16d, the elastic force of 17c, 17d, thereby at the peristome 2a place of shell 2, O swings in vertical direction with respect to optical axis.That is, when making diffuser plate 12 swings by drive plate 32, because rubber section 17, diffuser plate 12 sustained oscillation in for a long time is so can make drive plate 32 drive off and on.Therefore, drive plate 32 needn't be driven always,, flicker can be reduced efficiently so additional waste energy ground does not apply continuous motion to diffuser plate 12 effectively.
In addition, by make diffuser plate 12 swings by the drive plate 32 that is rotated, can sound-inhibiting and generation of vibration.Therefore, can prevent to be accompanied by the driving of drive division 30 and produce noise, the high screen of quiet performance 10 is provided.
In addition, drive plate 32 is shaken continuously, thus, the control of control part 30 becomes simply, in addition, drives off and on by make drive plate 32 as present embodiment, can power saving.
And then, use rubber as elastic component, but also can use rubber-like members such as silicone or foamed material, for example, also can be disc spring or leaf spring.
In addition, be dispersed with in the diffuser plate 12 and have diffusible particle, but also can replace this diffuser plate as shown in Figure 8, use and injecting the diffuser plate (pervasion component) 35 that a plurality of protuberance 35c are set on face 35a and the outgoing plane 35b.In this structure, the light of injecting diffuser plate 35 is spread by a plurality of protuberance 35c, so can give diffusivity to the laser of injecting diffuser plate 35 by simple structure.In addition, a plurality of protuberance 35c are formed on and just can make the laser diffusion of injecting at least one that inject among face 35a and the outgoing plane 35b, but when on the face of injecting 35a and the outgoing plane 35b both sides protuberance 35c being set all, can further make the laser diffusion of injecting.
[the 2nd embodiment]
Next with reference to Fig. 9 the 2nd embodiment of the present invention is described.In addition, in each illustrated below embodiment, for above-mentioned the 1st embodiment in the identical position of structure of screen 10 of back projecting projector, be marked with same numeral, omission will be described.
In the screen 40 in the present embodiment, (driver element: actuator) 45 structure is different with the 1st embodiment for the drive division that moves back and forth.
Drive division 45 has the solenoid 47 that drives by electromagnetic force movable part 46, and movable part 46 is set in the coil (diagram is omitted), by applying electric current to coil, movable part 46 forward travels.This solenoid 47 is configured to tilt about 45 ° with respect to the lower surface 12d of diffuser plate 12, by movable part 46, pushes the lower surface 12d of diffuser plate 12 to 45 ° of tops.
In addition, diffuser plate 12 by the rubber-like suspension strop (elastic component: telescoping member) thus 41 from overhung on top near the central authorities on (limit).Thus, except the fulcrum of suspension strop 41, diffuser plate 12 can carry out bigger the moving of degree of freedom.
Next, identical to the method for screen 40 projecting lasers with the 1st embodiment, so only screen 40 is described.
By solenoid 47, movable part 46 applies power to 45 ° of tops to the lower surface 12d of diffuser plate 12, thus diffuser plate 12 as shown in Figure 9, along 8 word orbital motions.And, by the elasticity of suspension strop 41, the motion of diffuser plate 12 within a certain period of time, while decay along 8 word track sustained vibrations.Like this, during along 8 word track sustained vibrations, 47 pairs of diffuser plates 12 of solenoid do not apply power at diffuser plate 12.Then, after the decay of having carried out predetermined amount, solenoid 47 is task again, pushes diffuser plate 12 to 45 ° of tops.
In the back projecting projector in the present embodiment, make diffuser plate 12 swings by solenoid 47, and make its suspension by rubber-like suspension strop 41, so needn't drive it always, so additional waste energy ground does not apply continuous motion effectively, can reduce from the flicker of the laser of screen 40 ejaculations.In addition, because solenoid 47 is less, so can realize the miniaturization of screen 40 integral body.
In addition, used suspension strop 41 as telescoping member, but also can use self-adhering film, rubber covered wire, flat rubber (flat go system), disc spring etc.In addition, use 1 suspension strop 41 to be illustrated, but also can use many.When using many, diffuser plate 12 is stabilized in the peristome 2a that remains on shell 2.
[the 3rd embodiment]
Next with reference to Figure 10 the 3rd embodiment of the present invention is described.
In the screen 50 in the present embodiment, do not use biconvex plate 13, and screen main body 50a is made as double-layer structural, these are different with the 1st embodiment.
Screen main body 50a comprises Fresnel plate (one deck in addition) 51 and the diffuser plate (diffusion layer) 52 identical with the 1st embodiment.
As shown in figure 10, on Fresnel plate 51, along the face relative with diffuser plate (diffusion layer) 52, promptly the periphery that is formed with the outgoing plane 51b of Fresnel Lenses 51c is provided with contact site 53.As long as contact site 53 has slick and sly shape, implemented rounding in the present embodiment.In addition, the thickness T from the face of the injecting 51a of Fresnel plate 51 to the front end of the contact site 53 of outgoing plane 51b is made as, and is thicker to the thickness S of the face that is formed with Fresnel Lenses 51c of outgoing plane 51b than the face of the injecting 51a from Fresnel plate 51.Thus, Fresnel plate 51 contacts with diffuser plate 52 at contact site 53, so the piercing portion at the top of the raised line of Fresnel Lenses 51c can not touch diffuser plate 52.
In addition, on screen main body 50a, be provided with the limiting member 54 that moves to optical axis O direction (direction vertical) of restriction diffuser plate 52 with the diffusingsurface of diffusion layer.This limiting member 54 is along the periphery setting of Fresnel plate 51 and diffuser plate 52.In addition, the section shape of limiting member 54 is, is formed with recess 54a on middle body, on the recess 54a of this limiting member 54, embedding Fresnel plate 51 and diffuser plate 52.
In addition, on limiting member 54, on the medial surface of the recess 54a of diffuser plate 52 sides, be provided with rubber 55, become the state that in recess 54a, is embedded with rubber 55, diffuser plate 52, Fresnel plate 51, keep so screen 50a is limited member 54 via rubber 55.Thus, can limit the moving to optical axis O direction of diffuser plate 52 reliably.
In the back projecting projector in the present embodiment,, move to the optical axis O of the light of injecting direction so limited diffuser plate 52 owing to have limiting member 54.Thus, can suppress the image blurring generation that the change of the focus when making diffuser plate 52 swing causes reliably, so can show distincter image.
In addition, by contact site 53, the piercing portion at the top of the raised line of Fresnel Lenses 51c can not touch diffuser plate 52, so can prevent the damage of diffuser plate 52.In addition, owing on contact site 53, implemented rounding, so the wearing and tearing of generation can be suppressed at Fresnel plate 51 and contact the time with diffuser plate 52.
In addition, contact site 53 is not limited only to rounding, also can implement chamfering.In addition, periphery at the Fresnel plate is provided with contact site 53, but also the protuberance of the middle body of Fresnel plate 51 can be made as contact site, at this moment too, as long as make from the face of the injecting 51a of Fresnel plate 51 thicker from the face of the injecting 51a of Fresnel plate 51 to the thickness S of the face that is formed with Fresnel Lenses 51c of outgoing plane 51b to the thickness ratio of the protuberance of the middle body of outgoing plane.
In addition, diffuser plate 52 has been arranged on outgoing plane 51b one side (looking hearer's one side) of Fresnel plate 51, but also can be arranged on the face of injecting 51a one side of Fresnel plate 51.
In addition, use rubber 55 to be illustrated in the present embodiment, but so long as the rubber-like member get final product, so also can use disc spring etc.In addition, rubber 55 also can be arranged in the recess 54a of limiting member 54, between Fresnel plate 51 and the diffuser plate 52.
In addition, preferably, when diffuser plate 52 swing, on the surface of contact of the slipping plane of Fresnel plate 51 and diffuser plate 52 and diffuser plate 52 and limiting member 54, implement lubricated.This lubricated gets final product for the wet type lubricated, but is difficult to outside seepage in order to make, the fluorination treatment of dry type is more effective.In addition, at diffuser plate 52 and Fresnel plate 51 mutually on the part etc. of mutual friction, constitute wherein at least one, can access lubricant effect thus by the material of on PTFE (teflon) resin or metal component surface, having implemented lubricated.
In addition, when the precision of Fresnel plate 51 and diffuser plate 52 is higher, even perhaps diffuser plate 52 go up to move in optical axis O direction (focus direction) and also can not cause and also can not use rubber 55 when image blurring.
And then, also can replace diffuser plate 52, use the biconvex plate 13 that uses in the 1st embodiment, this biconvex plate 13 is swung as diffusion layer.In this structure, same when making diffuser plate 52 swing, the light that penetrates from screen 50 becomes the light that has suppressed flicker, so can show preferable image.
[the 4th embodiment]
Next with reference to Figure 11 the 4th embodiment of the present invention is described.
Image display device in the present embodiment is applied to image display device with the screen in the 1st embodiment 10.
As shown in figure 11, image display device 100 roughly comprises: light supply apparatus 101, and it has LASER Light Source 102R, the LASER Light Source 102G that penetrates G light that penetrates R light, the LASER Light Source 102B that penetrates B light; Lens optical system 103, it comprises collimating optical system 104 and beam shaping optical system 105; Scanner (scanning element) 106, it scans the laser of being injected on two-dimensional directional; Projection lens 108, it amplifies projection to the laser by scanner 106 scannings; With catoptron 109, it will be reflected to screen 10 by the light of projection lens 108 projections.In this image display device 100, light supply apparatus 101, lens optical system 103, scanner 106, projection lens 108, catoptron 109 are incorporated in the shell 110 with screen 10, the laser of propagating in the shell 110 scans on screen 10, thus display image.
In image display device of the present invention, used the screen 10 that reduces the generation of glimmering, suppress image blurring, so the light that penetrates from screen 10 has been suppressed the generation of flicker.Therefore, can show do not have brightness irregularities and the second best in quality image.
In addition, in the present embodiment, use the screen 10 in the 1st embodiment to be illustrated, but also can be screen 40 in the 2nd embodiment or the screen 50 in the 3rd embodiment.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, can apply various changes in the scope that does not break away from purport of the present invention.
For example, as long as the elastic force of elastic component is applied to x direction and y direction in the diffusingsurface of diffuser plate,,, diffuser plate is remained and can swing via disc spring by shell so for example can disc spring be set in the bight of the top of diffuser plate.
In addition, on shell, be provided with elastic component (rubber, suspension strop), but the framework of picture frame shape also can be set along the periphery of diffuser plate.Under the situation of this structure, framework keeps diffusion layer via elastic component, so can will carry out being embedded in the screen main body of the corresponding vibration of purposes the peristome of shell.
And then, showed that having implemented static on the face of injecting of diffuser plate and outgoing plane prevents the structure handled, implemented static and prevent to handle but also can go up at the face of injecting (face relative) of the outgoing plane (face relative) of Fresnel plate or biconvex plate with diffuser plate with diffuser plate.In this structure, prevent to handle by implementing static on the face injecting of the outgoing plane of Fresnel plate or biconvex plate, the electrostatic force that produces in the time of can further suppressing the diffuser plate vibration can make diffuser plate successfully vibrate.
In addition, also can replace static to prevent to handle, on the face of injecting of the face of injecting of the outgoing plane of Fresnel plate, biconvex plate, diffuser plate and outgoing plane, form the coverlay that forms by the lubricity resin.In addition, at elastic component (rubber) and diffuser plate mutually on the part of mutual friction, constitute wherein at least one, can access lubricant effect thus by the material of on PTFE (teflon) resin or metal component surface, having implemented lubricated.
In addition, using the Fresnel plate to be illustrated, but be not limited thereto, as long as have the refraction action that makes the anaclasis of injecting, for example, also can be hologram sheet etc.
And then, used the biconvex plate of the lenticular lens elements that is formed with the semicircle tubular, but be not limited thereto, also can be the optical element of the lenticular lens elements that is shaped as circular or substantially elliptical when being formed with plane earth and seeing the biconvex plate.In addition, optical component for example also can be a glass etc. so long as have the tabular member of transmitance and get final product.
In addition, used the higher LASER Light Source of interference capability, but but,, also can use high-pressure mercury-vapor lamp, LED etc. as light source as long as use light source just can access effect of the present invention with interference capability as light source.
In addition, used the liquid crystal light valve of transmission-type, but also can use the liquid crystal light valve of reflection-type and microlens array device as optical modulation element as optic modulating device.At this moment, the structure of projection optics system can suitably change.
In addition, screen also can be the structure of irregular in the xy plane (at random) vibration.In this structure, be made as by drive division screen is vibrated brokenly, flicker is reduced.
In addition, also can on the outgoing plane of biconvex plate, form black matrix" (black matrix) (light shield layer).In this structure, can effectively prevent to turn back to once more and inject the face side, and laser is spread from outgoing plane efficiently by the laser that lenticular lens elements is assembled.Therefore, can the display brightness height, the image of the good distinctness of contrast.
Below, with reference to accompanying drawing, the embodiment of the screen among the present invention, back projecting projector and image display device is described.In addition, in the accompanying drawing below, be made as the size that to discern, the engineer's scale of each member has been carried out suitable change in order to make each member.
[the 5th embodiment]
Figure 12 A is the stereographic map of the schematic configuration of the back projecting projector (projector) 201 in the expression embodiment of the present invention, and Figure 12 B is the side sectional view of the back projecting projector 201 shown in Figure 12 A.Back projecting projector 201 in the embodiment of the present invention is modulated the light that shoots out from light supply apparatus by light-modulating cell, and the light amplification after will modulating is incident upon on the screen 210.
Shown in Figure 12 A, back projecting projector 201 comprises: shell (maintaining part) 202 and be installed on the front surface of shell 202, screen 210 that image throwed.Be provided with front panel 203 on the part below the screen 210 of shell 202, the left and right sides of plate 203 is provided with the peristome 204 of output from the sound of loudspeaker in front.
Next, the internal structure to the shell 202 of back projecting projector 201 describes.
Shown in Figure 12 B, below shell 202 inside of back projecting projector 201, be equipped with projection optics system 220.Be provided with catoptron 205,206 in shell 202 inside, the light that penetrates from projection optics system 220 is reflected by catoptron 205,206, is exaggerated to project on the screen 210.
Next, the schematic configuration to the projection optics system 220 of back projecting projector 201 describes.
Figure 13 is the skeleton diagram of structure of the projection optics system 220 of expression back projecting projector 201.In addition, in Figure 13, the shell 202 that will constitute back projecting projector 201 for simplification omits.
Projection optics system 220 comprises: red laser light source (light supply apparatus) 221R that penetrates red light, penetrate green laser light source (light supply apparatus) 221G of green light, penetrate blue laser light source (light supply apparatus) 221B of blue light, respectively to from these LASER Light Source 221R, 221G, liquid crystal light valve (optic modulating device) 224R that the laser that 221B penetrates is modulated, 224G, 224B, will be by liquid crystal light valve 224R, 224G, the cross colour splitting prism (coloured light synthesis unit) 226 that laser after the 224B modulation is synthetic and to amplifying the projection lens (grenade instrumentation) 227 of projection by cross colour splitting prism 226 synthetic laser.
Projection optics system 220 comprises lamp optical system 222R, 222G, the 222B uniform illumination system as the Illumination Distribution homogenising that makes the laser that penetrates from LASER Light Source 221R, 221G, 221B, described lamp optical system 222R, 222G, 222B are configured on the ejaculation direction of each LASER Light Source 221R, 221G, 221B, and laser is injected to liquid crystal light valve 224R, 224G, 224B.For example, lamp optical system 222R, 222G, 222B comprise holography, field lens.
In addition, each liquid crystal light valve 224R, 224G, 224B inject side and emitting side, dispose polarization plates (not shown).Thereby, in light beam, only there is the rectilinearly polarized light transmission of predetermined direction to cross and injects the lateral deviation vibration plate from each LASER Light Source 221R, 221G, 221B, inject each liquid crystal light valve 224R, 224G, 224B.In addition, also polarization conversion unit (not shown) can be set in the place ahead of injecting the lateral deviation vibration plate.At this moment, transform the light beam into the light of wanting transmission to cross to inject the lateral deviation vibration plate, can improve the utilization ratio of light thus by the polarization conversion unit.
3 kinds of coloured light by each liquid crystal light valve 224R, 224G, 224B modulation are injected cross colour splitting prism 226.This prism is pasted together 4 right-angle prisms and form, and disposes the dielectric multilayer film of reflection red light and the dielectric multilayer film of reflect blue light within it on the surface crosswise.By these dielectric multilayer films that 3 kinds of coloured light are synthetic, form the light of representing coloured image.Then, the light after synthesizing is projected on the screen 210 by the projection lens 227 that is included in the projection optics system, demonstrates enlarged image.
Next, the details to screen 210 describes.
As Figure 14, shown in Figure 16, screen 210 comprises: screen main body 210a, the rubber-like rubber section (holding components: elastic component) 217, and drive division (driver element: actuator) 230.
At first, the one-piece construction to screen main body 210a describes.
As shown in figure 15, the screen main body comprises: the Fresnel plate 211 that the angle of the light injected is changed, have the biconvex plate (diffusion layer) 213 of transmitance, and be configured between Fresnel plate 211 and the biconvex plate 213, make the diffuser plate (diffusion layer) 212 of the light diffusion of injecting.
In addition, as shown in figure 16, on the front surface of shell 202, be formed with peristome 202a, in this peristome 202a, be provided with diffuser plate 212.And, between the periphery of the internal face 202b of peristome 202a and diffuser plate 212, be provided with gap 202c.In addition, at screen main body 210a, image display area (image forming area) A by projection lens 227 display images is the zone along the periphery of the inboard of diffuser plate 212 shown in the line of the single-point among Figure 16.
Below rubber section 217 is described.
As shown in figure 16, rubber section 217 is set at the outside of image display area A of the periphery of diffuser plate 212, restriction diffuser plate 212 to the moving of the optical axis O of the light of injecting direction, support diffuser plate 212 to such an extent that can swing.In addition, rubber section 217 is a tabular, as shown in figure 16, between the surperficial 216a on the right of the internal face 202b of shell 202 and diffuser plate 212, possesses the rubber 217a that is provided with in the mode of filling gap 202c.In addition, rubber section 217 also possesses: and rubber 217a similarly is separately positioned between the surperficial 216b on the left side of the internal face 202b of shell 202 and diffuser plate 212, rubber 217b, rubber 217c, rubber 217d between the surperficial 216c of the top of the internal face 202b of shell 202 and diffuser plate 212, between the surperficial 216d of the bottom of the internal face 202b of shell 202 and diffuser plate 212.Thus, the elastic force of rubber 217a, 217b, 217c, 217d is applied on x direction (the predetermined direction in the diffusingsurface of diffuser plate: be provided with the horizontal direction under the state of screen) and the y direction (direction of intersecting with described predetermined direction: be provided with the vertical direction under the state of screen).
In addition, rubber 217a, 217b, 217c, 217d are configured in respectively near the central authorities of each face 216a, 216b, 216c, 216d.Thus, can make diffuser plate 212 swing equably in the peristome 202a of shell 202.
In addition, illustrated that rubber is flat situation, but also can be following structure.That is, also can be the rubber structure that 1 L font is set respectively on an angle of diffuser plate 212 and its diagonal angle.
Next, the details to screen main body 210a describes.
At first, Fresnel plate 211 is described.
As shown in figure 14, Fresnel plate 211 roughly is formed with to concentric circles the Fresnel Lenses 211c of prism-like on the outgoing plane 211b relative with injecting face 211a.This Fresnel Lenses 211c makes from projection lens 227 ejaculations, from injecting the laser refraction that face 211a injects, and converts directional light to, is penetrated by outgoing plane 211b.
In addition, implemented chamfering at the top of the raised line of Fresnel Lenses 211c.In addition, also can implement rounding at the top of the raised line of Fresnel Lenses 211c.
Next, biconvex plate 213 is described.
As shown in figure 14, biconvex plate 213 is being injected on the face 213a, at the lenticular lens elements 213c that side is provided with a plurality of semicircle tubulars that injects of laser.These a plurality of lenticular lens elements 213c are configured to: on the plane vertical (xy plane) with optical axis O, length direction on y direction (being provided with the vertical direction under the state of screen), and on the x direction side by side.In addition, implemented rounding at the top of lenticular lens elements 213c.In addition, also can implement chamfering at the top of lenticular lens elements 213c.
And then, biconvex plate 213 makes from injecting laser that face 213a injects and is diffused into predetermined angular range and penetrates from outgoing plane 213b, thereby the field angle of image is enlarged, make position after moving predetermined angular range from the front of screen 210 observe also to observe good high image.In addition, as the material of biconvex plate 213, so long as the material that light can see through gets final product.
In addition, as the material of Fresnel plate 211 and biconvex plate 213, for example can enumerate thermoplastic resin such as acrylic resin, polycarbonate resin, polyvinyl chloride resin or cycloolefin resinoid etc.In addition, preferably have transmitance and have rigidity, and then consider that preferably surperficial mar resistance and against weather select.Thus, can access higher Fresnel plate 211 of reliability and biconvex plate 213.
Next, diffuser plate 212 is described.
As shown in figure 14, diffuser plate 212 makes the laser diffusion of penetrating from the outgoing plane 211b of Fresnel plate 211, and injects to the face of the injecting 213a of biconvex plate 213.In addition, diffuser plate 212 is dispersed with in inside and has diffusible particle 212c.Specifically, can use the silicon dioxide, glass, resin etc. of microparticle shape (pearl).The average particulate diameter of particle 212c is not particularly limited, but is preferably 0.5 μ m～50 μ m.
In addition, as the material of diffuser plate, can enumerate for example cycloolefin resinoid.
In addition, as shown in figure 17, the thickness L of diffuser plate 212 be made as Fresnel plate 211 and the gap 215 of biconvex plate 213 interval M roughly 2/3.In addition, the thickness L of diffuser plate 212 is preferably interval M over half in gap 215.By this structure, diffuser plate 212 can not depart from the amount of the thickness L of this diffuser plate 212 on optical axis O direction between Fresnel plate 211 and biconvex plate 213, so this diffuser plate 212 can bending (relaxation む).
Promptly, thickness L by this diffuser plate 212, move in the gap 215 of broad with the official post diffuser plate 212 below the certain width, diffuser plate 212 can not depart from more than the certain distance on the focus direction thus, the confusion image that causes so can not produce fuzzy by focus.In addition, by this gap 215, can limit moving of diffuser plate 212, even so when diffuser plate 212 is thin (thickness: 0.5mm for example, size: tens of inches), also can not use the retaining member that keeps diffuser plate 212, on one side and diffuser plate 212 is not stretched agley, Yi Bian move it.
In addition, thus, can reduce the quality of diffuser plate 212, thus diffuser plate 212 is moved simply, and then can realize the miniaturization of the integral body of screen 210.
Diffuser plate 212 has been implemented static and has been prevented to handle on the face of injecting shown in Figure 17 (face relative with the Fresnel plate) 212a and outgoing plane (face relative with the biconvex plate) 212b.
In addition, Fresnel plate 211, biconvex plate 213, diffuser plate 212 are formed by the plastic material that acryl resin etc. constitutes respectively.Thus, can realize the lightness of screen 210 integral body.Particularly, diffuser plate 212 will become the member of vibration and need lightness.But,, can produce electrostatic force, the bigger resistance when becoming diffuser plate 212 vibrations owing to form diffuser plate 212 by plastic material.At this moment, prevent to handle, can reduce the resistance that causes by electrostatic force by on the face of the injecting 212a of diffuser plate 212 and outgoing plane 212b, implementing static.Prevent the method handled as static, can sneak into static in the inside of plastic material and prevent treating agent, also can prevent treating agent at surface coated static.
Next, drive division 230 is described.
As shown in figure 16, on screen 210, be provided with the drive division 230 that itself is rotated motion, diffuser plate 212 is swung continuously.The concrete structure of drive division 230 is, is arranged on lower surface 216d one side of diffuser plate 212, via rubber section 217 diffuser plate 212 can be swung abreast with respect to outgoing plane (diffusingsurface) 212b of this diffuser plate 212.In addition, this drive division 230 drives off and on, and diffuser plate 212 is vibrated continuously.Drive division 230 makes that diffuser plate 212 is gone up in the direction (xy in-plane) parallel with the outgoing plane 212b of laser diffusion, i.e. vibration continuously on the direction vertical with the optical axis O of laser shown in Figure 14.In addition, make the frequency of diffuser plate 212 vibration be set can perception than the people the flicker frequency height.
In addition, as shown in figure 16, drive division 230 comprises that with central shaft P be the discoid drive plate 232 that the center turns clockwise.As shown in phantom in Figure 16, diffuser plate 212 can contact with drive plate 232, when the face 216d of diffuser plate 212 contacts with drive plate 232, pushes diffuser plate 212 to sense of rotation, and it is swung along circular orbit.
In addition, also can make diffuser plate 212, also can make diffuser plate in addition along 208 font track wobbles along the elliptical orbit swing.
Next, to the back projecting projector 201 by the present embodiment that constitutes by above-mentioned structure and the method for image projection on screen 210 described.
At first, as shown in figure 13, the laser that penetrates from each LASER Light Source 221R, 221G, 221B makes roughly homogenising of Illumination Distribution by lamp optical system 222R, 222G, 222B respectively, injects liquid crystal light valve 224R, 224G, 224B.Thereby the laser of injecting is modulated by liquid crystal light valve 224R, 224G, 224B respectively, injects cross colour splitting prism 226.Then, R light, G light and the B light compositing that will be modulated by each transmissive liquid crystal light valve 224R, 224G, 224B respectively of cross colour splitting prism 226.Project on the screen 210 by projection lens 227 by cross colour splitting prism 226 synthetic light.
If advancing of laser illustrated to show, as shown in figure 18, the laser that is projected onto on the screen 210 is injected from the face of the injecting 211a of Fresnel plate 211, by Fresnel Lenses 211c refraction, forms directional light.Then, to the random direction diffusion, the face of the injecting 213a from biconvex plate 213 injects the directional light that penetrates from the outgoing plane 211b of Fresnel plate 211 by the light after spreading by diffuser plate 212.Then, the light that penetrates from biconvex plate 213 is spread in predetermined angular range.At this moment, as shown in figure 16, when diffuser plate 212 contacts with drive plate 232, be accompanied by the rotation of drive plate 232, diffuser plate 212 is pushed to the top, and then, diffuser plate 212 moves, and leaves drive plate 232.That is, the power that offers diffuser plate 212 is passed on the rubber 217c on the face 216c that is arranged on the top, and is rebounded by the inner wall surface 202b of shell 202, is delivered to diffuser plate 212 once more by the elastic force of rubber 217c.Simultaneously, the power that offers diffuser plate 212 is delivered to rubber 217b, 217d, 217a, so as shown in figure 16, diffuser plate 212 is swung along circular orbit.
Then, when the decay of the swing of predetermined amount was carried out, shown in the dotted line of Figure 16, diffuser plate 212 contacted with drive plate 232, so be pushed to the top once more.
In the screen 210 of back projecting projector 201 in the present embodiment, diffuser plate 212 is swung in the direction vertical with the optical axis O of the light of injecting this diffuser plate 212 by rubber section 217, so can not move on optical axis O direction.Therefore, the image blurring generation that the change by focus causes can be suppressed, distinct image can be shown.
In addition since by rubber section 217 at the periphery upper support diffuser plate 212 in the outside of image display area A, so bring influence can not for shown image, can limit diffuser plate 52 to the moving of optical axis O direction, so can show distinct image.
And then drive division 230 makes diffuser plate 212 swings continuously, so there is not dead point (the instantaneous point that stops to move), can not exist so produce the moment of interfering in a flash.Therefore, can keep the effect of inhibition continuously from the spot of the light of screen main body 210a ejaculation.
In addition, drive plate 232 is moved continuously, thus, the control of control part 230 becomes simply, in addition, moves off and on by make drive plate 232 as present embodiment, can power saving.
And then, use rubber-like rubber as elastic component, but also can use rubber-like members such as silicone (polysiloxane) or foamed material, for example, also can be disc spring or leaf spring.
In addition, be dispersed with in the diffuser plate 212 and have diffusible particle, but also can replace this diffuser plate as shown in figure 19, use and injecting the diffuser plate (pervasion component) 235 that a plurality of protuberance 235c are set on face 235a and the outgoing plane 235b.In this structure, the light of injecting diffuser plate 235 is spread by a plurality of protuberance 235c, so can give diffusivity to the laser of injecting diffuser plate 235 by simple structure.In addition, a plurality of protuberance 235c are formed on just can make the laser diffusion of injecting at least one that inject among face 235a and the outgoing plane 235b, but when on the face of injecting 235a and the outgoing plane 235b both sides protuberance 235c being set all, can further make the laser diffusion of injecting.
[the 6th embodiment]
Next with reference to Figure 20 the 6th embodiment of the present invention is described.In addition, in each illustrated below embodiment, for above-mentioned the 5th embodiment in the identical place of structure of screen 210 of back projecting projector, be marked with same numeral, omission will be described.
In the screen 240 in the present embodiment, (driver element: actuator) 245 structure is different with the 5th embodiment for the drive division that moves back and forth.
Drive division 245 has the solenoid 247 that movable part 246 is driven by electromagnetic force, and movable part 246 is set in the coil (diagram is omitted), by applying electric current to coil, movable part 246 moving linearlies.This solenoid 247 is configured to tilt about 45 ° with respect to the lower surface 212d of diffuser plate 212, by movable part 246, pushes the lower surface 212d of diffuser plate 212 to 45 ° of tops.
In addition, diffuser plate 212 by the rubber-like suspension strop (support member: telescoping member) thus 241 from overhung on top near the central authorities on (limit).This suspension strop 241 is set at the outside of image display area A of the periphery of diffuser plate 212.And then except the fulcrum of suspension strop 241, diffuser plate 212 can carry out bigger the moving of degree of freedom.
Next, identical to the method for screen 240 projecting lasers with the 5th embodiment, so only screen 240 is described.
By solenoid 247, movable part 246 applies power to 45 ° of tops to the lower surface 212d of diffuser plate 212, thus diffuser plate 212 as shown in Figure 20, along 8 word orbital motions.And, by the elasticity of suspension strop 241, the motion of diffuser plate 212 within a certain period of time, while decay along 8 word track sustained vibrations.Like this, during along 8 word track sustained vibrations, 247 pairs of diffuser plates 212 of solenoid do not apply power at diffuser plate 212.Then, after the decay of having carried out predetermined amount, solenoid 247 is task again, pushes diffuser plate 212 to 45 ° of tops.
In the screen 240 of back projecting projector in the present embodiment, make diffuser plate 212 swings by solenoid 247, and make its suspension by rubber-like suspension strop 241, so needn't drive it always, so do not apply continuous motion the additional waste energy, can reduce from the flicker of the laser of screen 240 ejaculations.In addition, because solenoid 247 is less, so can realize the miniaturization of screen 240 integral body.
In addition, used suspension strop 241 as telescoping member, but also can use self-adhering film, rubber covered wire, flat rubber, disc spring etc.In addition, use 1 suspension strop 241 to be illustrated, but also can use many.When using many, diffuser plate 212 is stabilized in the peristome 202a that remains on shell 202.
[the 7th embodiment]
Next with reference to Figure 21 A, Figure 21 B and Figure 21 C the 7th embodiment of the present invention is described.
In the screen 250 in the present embodiment, be rotated the drive division (driver element: 251 structure actuator), and replace rubber section 217 and to use support portion (supporting member) 255 to support diffuser plates 212 these aspects different with the 5th embodiment of motion.
Shown in Figure 21 A, drive division 251 comprises excentric shaft 252, drive plate 253 and connecting portion (connecting elements) 254.
Drive plate 253 is the center rotation by motor (diagram is omitted) thereby with axle P.In addition, excentric shaft 252 is installed on the drive plate 253 from the position that axle P leaves.
Connecting portion 254 is arranged on the lower right side of diffuser plate 212, is connected with diffuser plate 212.In addition, shown in Figure 21 B, be formed with the 254a of hole portion that has with the roughly the same diameter of excentric shaft 252 on connecting portion 254, excentric shaft 252 is inserted through the 254a of this hole portion.
Support portion 255 is set on the face 216d of bottom of the left side one side in the outside of image display area A, and mounting diffuser plate 212 on upper surface 255a.The concrete structure of support portion 255 is shown in Figure 21 C, and the long side direction of 216d (x direction) is provided with groove 255b surfacewise on the upper surface 255a of this support portion 255.In addition, the degree of depth of groove 255b is set to the degree of depth that can not break away from from groove 255b when circular orbit is swung at diffuser plate 212.That is, determine according to the position that is arranged on the excentric shaft 252 on the drive plate 253.Thus, diffuser plate 212 can move (slip) along groove 255b in inside, restriction diffuser plate 212 to the moving of the optical axis O direction of injecting light, support diffuser plate 212 to such an extent that can swing.
By this structure, when drive division 251 is driven, drive plate 253 is the center rotation with axle P, be accompanied by the rotation of drive plate 253, shown in Figure 21 A, connecting portion 254 is via excentric shaft 252, Yi Bian keeping disposing the state of diffuser plate 212 at the upside of connecting portion 254, Yi Bian be the center rotation with axle P.Thus, driving force is delivered on the diffuser plate 212 from drive division 251 continuously, and diffuser plate 212 has limited moving of optical axis O direction by the groove 255b of support portion 255, simultaneously to move along circular orbit with the corresponding radius of offset.In addition, diffuser plate 212 is moved along elliptical orbit, in addition, diffuser plate 212 is moved along 8 font tracks.
In the screen 250 of back projecting projector in the present embodiment, thereby diffuser plate 212 can be swung by the connecting portion 254 that is arranged on the drive division 251, so can the driving of drive division 251 be transmitted to diffuser plate 212, so can easily make diffuser plate 212 swings via connecting portion 254.
In addition, because the outside of image display area A is to have support portion 255 on the face 216d of bottom of diffuser plate 212, so can prevent that diffuser plate 212 from moving to optical axis O direction with simple structure.
And then, owing to possess support portion 255,, can limit diffuser plate 212 and move to optical axis O direction so the motion of diffuser plate 212 on the arrow P direction shown in Figure 21 A has degree of freedom.Therefore, can suppress flicker, suppress the image blurring generation that the change by focus causes simultaneously, can show distinct image.
In addition, also can form diffuser plate 212 and connecting portion 254 as a whole.In addition, also can make connecting portion 254 clampings diffuser plate 212 and fix.
In addition, on connecting portion 254, formed the 254a of hole portion, but in order to limit the moving to optical axis O direction of diffuser plate 212 more reliably, also can be promptly shown in Figure 22 as the Q-Q alignment pseudosection among Figure 21 A, on excentric shaft 252, form the groove 258 have with the roughly the same width of the gauge of diffuser plate 212, and connecting portion 254 is inserted these grooves 258.Thus, can the right of diffuser plate 212 side and left side lateral confinement system diffuser plate 212 to the moving of optical axis O direction, so can further suppress diffuser plates 212 moving on focus direction through connecting portion 254.
[the 8th embodiment]
Next with reference to Figure 23 A and Figure 23 B the 8th embodiment of the present invention is described.
In the screen 260 of present embodiment, the structure of support portion 261 is different with the 7th embodiment.
Shown in Figure 23 A, support portion 261 is set at the lower-left side in the outside of image display area A, shown in Figure 23 B, comprising: be arranged on a back up pad 262 on the Fresnel plate 211 and an end face 263a and be bonded in columned jut 263 on the back up pad 262.The end face 263b in addition of this jut 263 is bonded on the biconvex plate 213.
Shown in Figure 23 A, on diffuser plate 265, be formed with the 265a of hole portion that can allow the size that diffuser plate 212 moves to x direction and y direction in the lower-left side.And, shown in Figure 23 B, be made as the state that jut 263 is connected in the 265a of hole portion.Thus, at diffuser plate 212 when circular orbit is swung, limited diffuser plate 212 to the moving of the optical axis O direction of injecting light, support diffuser plate 212 to such an extent that can in the xy plane, swing, so become the structure that diffuser plate 265 can crooked (relaxation む).
In the screen 260 of back projecting projector in the present embodiment,,, can limit diffuser plate 265 and move to optical axis O direction so in the face of diffuser plate 265, have freedom of motion owing to have support portion 261.Therefore, the image blurring generation that the change by focus causes can be suppressed, distinct image can be shown.
In addition, also can not use back up pad 262, and Fresnel plate 211 is connected with biconvex plate 213 by columned jut 263.
In addition, can on diffuser plate 265, not form the 265a of hole portion yet, and jut 263 is fixed on the diffuser plate 265 in the outside of image display area A.Under the situation of this structure, the point that is connecting on the diffuser plate 265 of jut 263 becomes dead point (point that motion stops), but in image display area A, diffuser plate 265 is swung continuously, so can reduce flicker continuously.
[the 9th embodiment]
Next with reference to Figure 24 the 9th embodiment of the present invention is described.
In the screen 270 in the present embodiment, basic structure is identical with the 5th embodiment, but it is different with the 5th embodiment not using biconvex plate 213 screen main body 270a to be made as the double-layer structural this respect.
Screen main body 270a comprises Fresnel plate 271 and the diffuser plate (diffusion layer) 272 identical with the 5th embodiment.
As shown in figure 24, on Fresnel plate 271, along the face relative with diffuser plate 272, promptly the periphery that is formed with the outgoing plane 271b of Fresnel Lenses 271c is provided with contact site 273.As long as contact site 273 has slick and sly shape, implemented rounding in the present embodiment.In addition, the thickness T from the face of the injecting 271a of Fresnel plate 271 to the front end of the contact site 273 of outgoing plane 271b is made as, and is thicker to the thickness S of the face that is formed with Fresnel Lenses 271c of outgoing plane 271b than the face of the injecting 271a from Fresnel plate 271.Thus, Fresnel plate 271 contacts with diffuser plate 272 owing to its contact site 273, so the piercing portion at the top of the raised line of Fresnel Lenses 271c can not touch diffuser plate 272.
In addition, on screen main body 270a, be provided with the limiting member 274 that moves to optical axis O direction (direction vertical) of restriction diffuser plate 272 with the diffusingsurface of diffusion layer.This limiting member 274 is along the periphery setting of Fresnel plate 271 and diffuser plate 272.In addition, the section shape of limiting member 274 is, is formed with recess 274a on middle body, in the recess 274a of this limiting member 274, embedding Fresnel plate 271 and diffuser plate 272.
In addition, on limiting member 274, on the medial surface of the recess 274a of diffuser plate 272 1 sides, be provided with rubber 275, become the state that in recess 274a, is embedded with rubber 275, diffuser plate 272, Fresnel plate 271, so screen 270a is maintained on the limiting member 274 via rubber 275.Thus, can limit the moving to optical axis O direction of diffuser plate 272 reliably.
In the screen 270 of back projecting projector in the present embodiment,, move to the optical axis O direction of injecting light so limited diffuser plate 272 owing to have limiting member 274.Thus, can suppress the image blurring generation that the change of the focus when making diffuser plate 272 swing causes reliably, so can show distincter image.
In addition, by contact site 273, the piercing portion at the top of the raised line of Fresnel Lenses 271c can not touch diffuser plate 272, so can prevent the damage of diffuser plate 272.In addition, because contact site 273 has been implemented rounding, so the wearing and tearing of generation can be suppressed at Fresnel plate 271 and contact the time with diffuser plate 272.
In addition, contact site 273 is not limited only to rounding, also can implement chamfering.In addition, periphery at the Fresnel plate is provided with contact site 273, but also the protuberance of the middle body of Fresnel plate 271 can be made as contact site, at this moment too, as long as make from the face of the injecting 271a of Fresnel plate 271 thicker from the face of the injecting 271a of Fresnel plate 271 to the thickness S of the face that is formed with Fresnel Lenses 271c of outgoing plane 271b to the thickness ratio of the protuberance of the middle body of outgoing plane.
In addition, diffuser plate 272 has been arranged on outgoing plane 271b one side (looking hearer's one side) of Fresnel plate 271, but also can be arranged on the face of injecting 271a one side of Fresnel plate 271.
In addition, use rubber 275 to be illustrated in the present embodiment, but so long as the rubber-like member get final product, so also can use disc spring etc.In addition, rubber 275 also can be arranged in the recess 274a of limiting member 274, between Fresnel plate 271 and the diffuser plate 272.
In addition, preferably, when diffuser plate 272 swing, on the surface of contact of the slipping plane of Fresnel plate 271 and diffuser plate 272 and diffuser plate 272 and limiting member 274, implement lubricated.This lubricated gets final product for the wet type lubricated, but is difficult to outside seepage in order to make, the fluorination treatment of dry type etc. are more effective.In addition, at diffuser plate 272 and Fresnel plate 271 mutually on the part etc. of mutual friction, constitute wherein at least one, can access lubricant effect thus by the material of PTFE (teflon) resin or metal component surface having been implemented lubricated.
In addition, when the precision of Fresnel plate 271 and diffuser plate 272 is higher, even perhaps diffuser plate 272 go up to move in optical axis O direction (focus direction) and also can not cause and also can not use rubber 275 when image blurring.
[the 10th embodiment]
Next with reference to Figure 25 the 10th embodiment of the present invention is described.
In the screen 280 of present embodiment, replace rubber section (supporting member) 217 and use the fixed part (supporting member) 281 that the motion of diffuser plate 212 is fixing, and Fresnel plate 284 is the Fresnel plate 271 in the 9th embodiment, and these are different with the 5th embodiment.
As shown in figure 25, comprising on the fixed part 281: be provided with groove 282a, in this groove 282a, embed fixed head 282 and 2 pairs of magnets 283 of diffuser plate 212.This fixed part 281 separates predetermined compartment of terrain configuration with the recess 274a of limiting member 274.
Magnet 283 comprises along optical axis O and mutually exclusive the 1st magnet 283a and the 2nd magnet 283b, and the 1st magnet 283a is embedded in the groove 282b on the face vertical with optical axis O that is separately positioned on fixed head 282.In addition, the 2nd magnet 283b is embedded in the groove 274b on the face vertical with optical axis O that is arranged on limiting member 274.Thus, the 1st magnet 283a and the 2nd magnet 283b separate predetermined interval along optical axis O, remain on certain position on the optical axis O direction being embedded in diffuser plate 212 on the fixed head 282.That is, become the state of the mutual balance of repulsive force of two paired magnets 283.
In the screen 280 of the back projecting projector of present embodiment, by the 1st magnet 283a and the 2nd magnet 283b, mobile being fixed on optical axis O direction of diffuser plate 212.Like this, by moving of repulsive force restriction diffuser plate 212, the swing of diffuser plate 212 has increased degree of freedom on the direction vertical with optical axis O, so can diffuser plate 212 be swung efficiently with simple structure.
In addition, fixed head 282 also can be made of the 1st magnet 283a.In addition, also can replace the repulsive force of magnet 283, and limiting member 274 and fixed head 282 be repelled by electrostatic force.
And then, as shown in figure 26, when screen 290 is Fresnel plate 271 shown in the 9th embodiment and diffuser plate 272 double-layer structurals, also can use fixed head (supporting member) 291 and magnet (supporting member) 292.That is, the moving on optical axis O direction of diffuser plate 212 fixed by the attractive force of the 1st magnet 292a and the 2nd magnet 292b.
Concrete structure is, separates predetermined compartment of terrain configuration fixed head 291 in the limiting member 293 of section L word shape and the space 293a between the diffuser plate 272.Vertical with an optical axis O end face 291a and the diffuser plate 272 of fixed head 291 are bonded together, in the groove 291c of another end face 291b relative, the 1st magnet 292a is set with end face 291a.In addition, the 2nd magnet 292b is embedded in the groove 293b on the face vertical that is arranged on limiting member 293 with optical axis O.Thus, by the attractive force of the 1st magnet 292a and the 2nd magnet 292b, draw diffuser plate 272 to Fresnel plate 271 side draughts, but by contact site 273, the 1st magnet 292a and the 2nd magnet 292b separate predetermined interval along optical axis O, and diffuser plate 272 is remained on certain position on the optical axis O direction.In this structure,, the moving on optical axis O direction of diffuser plate 272 fixed, so can realize the reduction of part count by pair of magnets 292.
[the 11st embodiment]
Next with reference to Figure 27 the 11st embodiment of the present invention is described.
Image display device in the present embodiment is applied to image display device with the screen in the 5th embodiment 210.
As shown in figure 27, image display device 300 probably comprises: light supply apparatus 301, and it has LASER Light Source 302R, the LASER Light Source 302G that penetrates G light that penetrates R light, the LASER Light Source 302B that penetrates B light; Lens optical system 303, it comprises collimating optical system 304 and beam shaping optical system 305; Scanner (scanning element) 306, it scans the laser of being injected on two-dimensional directional; Projection lens 308, it amplifies projection to the laser by scanner 306 scannings; With catoptron 309, it will be reflected to screen 210 by the light of projection lens 308 projections.In this image display device 300, light supply apparatus 301, lens optical system 303, scanner 306, projection lens 308, catoptron 309 are incorporated in the shell 310 with screen 210, the laser of propagating in shell 310 scans on screen 210, thus display image.
In image display device of the present invention, used the screen 210 that reduces the generation of glimmering, suppress image blurring, so the light that penetrates from screen 210 has been suppressed the generation of flicker.Therefore, can show do not have brightness irregularities and the second best in quality image.
In addition, in the present embodiment, use the screen 210 in the 5th embodiment to be illustrated, but also can be screen 270 in screen the 260, the 9th embodiment in screen the 250, the 8th embodiment in screen the 240, the 7th embodiment in the 6th embodiment or the screen 280 in the 10th embodiment.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, can apply various changes in the scope that does not break away from purport of the present invention.
For example, on the side of the rubber that contacts with diffuser plate, also can form the groove on the support portion that is formed on the 7th embodiment.By this structure, can suppress the moving to optical axis direction of diffuser plate more reliably.
In addition, in the 7th, the 8th embodiment, be made as Fresnel plate 211, diffuser plate 212 and 213 three-layer structures of biconvex plate, but also can be made as Fresnel plate 211 and diffuser plate 212 double-layer structurals, perhaps Fresnel plate 211 and biconvex plate 213 double-layer structurals.When being Fresnel plate 211 and biconvex plate 213 double-layer structurals, similarly swing by making biconvex plate 213 and diffuser plate 212, can reduce from the flicker of the light of screen main body ejaculation.
And then, in the screen 270 and screen 290 that are double-layer structural, also can replace diffuser plate 272, use employed biconvex plate 213 in the embodiment 5, this biconvex plate 213 is made its swing as diffusion layer.In this structure, identical when making diffuser plate 272 swing, the light that penetrates from screen becomes the light that has suppressed flicker, so can show preferable image.
In addition, as long as the elastic force of elastic component is applied to x direction and y direction in the diffusingsurface of diffuser plate,,, diffuser plate is remained and can swing via disc spring by shell so for example also can disc spring be set in the bight of the top of diffuser plate.
In addition, on shell, be provided with elastic component (rubber, suspension strop), but the framework of picture frame shape also can be set along the periphery of diffuser plate.Under the situation of this structure, framework keeps diffusion layer via elastic component, so can will carry out being embedded in the screen main body of the corresponding vibration of purposes the peristome of shell.
And then, showed that having implemented static on the face of injecting of diffuser plate and outgoing plane prevents the structure handled, implemented static and prevent to handle but also can go up at the face of injecting (face relative) of the outgoing plane (face relative) of Fresnel plate or biconvex plate with diffuser plate with diffuser plate.In this structure, prevent to handle by implementing static on the face injecting of the outgoing plane of Fresnel plate or biconvex plate, the electrostatic force that produces in the time of can further suppressing the diffuser plate vibration can make the diffuser plate slyness successfully move.
In addition, also can replace static to prevent to handle, on the face of injecting of the face of injecting of the outgoing plane of Fresnel plate, biconvex plate, diffuser plate and outgoing plane, form the coverlay that forms by the lubricity resin.In addition, at elastic component (rubber) and diffuser plate mutually on the part of mutual friction, constitute wherein at least one, can access lubricant effect thus by the material of on PTFE (teflon) resin or metal component surface, having implemented lubricated.
In addition, using the Fresnel plate to be illustrated, but be not limited thereto, as long as have the refraction action that makes the anaclasis of injecting, for example, also can be hologram sheet etc.
And then, used the biconvex plate of the lenticular lens elements that is formed with the semicircle tubular, but be not limited thereto, also can be the optical element of the lenticular lens elements that is shaped as circular or substantially elliptical when being formed with the plane and seeing the biconvex plate.In addition, optical component for example also can be a glass etc. so long as have the tabular member of transmitance and get final product.
In addition, used the higher LASER Light Source of interference capability, but but,, also can use for example high-pressure mercury-vapor lamp, LED etc. as light source as long as use light source just can access effect of the present invention with interference capability as light source.
In addition, used the liquid crystal light valve of transmission-type, but also can use the liquid crystal light valve of reflection-type and microlens array device as optical modulation element as optic modulating device.At this moment, the structure of projection optics system can suitably change.
In addition, screen also can be the structure of irregular in the xy plane (at random) vibration.In this structure, be made as by drive division screen is vibrated brokenly, flicker is reduced.
In addition, also can on the outgoing plane of biconvex plate, form black matrix" (black matrix) (light shield layer).In this structure, can effectively prevent to turn back to once more and inject the face side, and laser is spread from outgoing plane efficiently by the laser that lenticular lens elements is assembled.Therefore, can the display brightness height, the image of the good distinctness of contrast.

Claims (20)

1. screen, it comprises:
The a plurality of layers that comprise the diffusion layer that makes the light diffusion of injecting;
With described diffusion layer support the elastic component that can move with respect to maintaining part arbitrarily; With
The driver element that described diffusion layer is moved on the direction vertical with the optical axis of the light of injecting this diffusion layer.
2. screen as claimed in claim 1, wherein: described driver element drives described diffusion layer off and on.
3. screen as claimed in claim 1 or 2, wherein:
Described elastic component comprises at least one telescoping member that links described maintaining part and described diffusion layer;
By this telescoping member, described diffusion layer is suspended on the described maintaining part.
4. as any described screen in the claim 1～3, wherein: on described diffusion layer, the elastic force of described elastic component be applied to respectively on the predetermined direction in the diffusingsurface of described diffusion layer and the direction of intersecting with this predetermined direction on.
5. as any described screen in the claim 1～4, wherein: the limiting member that moves that comprises the described diffusion layer of restriction to the optical axis direction of the light of injecting.
6. as any described screen in the claim 1～5, wherein: in described a plurality of layer, be configured to other layers adjacent with described diffusion layer, with the right face of described diffusion layer phase on, be provided with the contact site that contacts and implemented rounding or chamfering with described diffusion layer phase.
7. as any described screen in the claim 1～6, wherein: described driver element is the actuator that moves back and forth.
8. as any described screen in the claim 1～6, wherein: described driver element is the actuator that is rotated motion.
9. projector, it comprises:
Penetrate the light supply apparatus of light;
According to the optic modulating device of picture signal to modulating from the light of this light supply apparatus ejaculation;
The grenade instrumentation that light by the modulation of this optic modulating device is throwed; With
Any described screen from the claim 1～8 that image throwed that this grenade instrumentation penetrates.
10. image display device, it comprises:
Penetrate the light supply apparatus of light;
Make the scanning element that scans from the light of this light supply apparatus ejaculation; With
By any described screen in the claim 1～8 that light throwed of this scanning element scanning.
11. a screen, it comprises:
The a plurality of layers that comprise the diffusion layer that makes the light diffusion of injecting;
Be arranged on image forming area in the described diffusion layer outer, with described diffusion layer support the supporting member that can move; With
The driver element that described diffusion layer is moved continuously.
12. screen as claimed in claim 11, wherein:
Described supporting member be arranged between the maintaining part arbitrarily that keeps described diffusion layer and the described diffusion layer, the rubber-like elastic component;
Described diffusion layer is kept by described maintaining part through described elastic component.
13. screen as claimed in claim 11, wherein:
Described supporting member comprises and will keep the maintaining part arbitrarily of described diffusion layer and at least one telescoping member that described diffusion layer links up;
By this telescoping member, described diffusion layer is suspended on the described maintaining part.
14. as any described screen in the claim 11～13, wherein: on described driver element, be provided with the connecting elements that is connected on the described diffusion layer, described diffusion layer can be moved.
15. as any described screen in the claim 11～14, wherein: the limiting member that moves that comprises the described diffusion layer of restriction to the optical axis direction of the light of injecting.
16. screen as claimed in claim 15, wherein: described supporting member is by limiting moving of described diffusion layer at the repulsive force that optical axis direction produced along the light of injecting described diffusion layer.
17. as any described screen in the claim 11～16, wherein: described driver element is the actuator that moves back and forth.
18. as any described screen in the claim 11～16, wherein: described driver element is the actuator that is rotated motion.
19. a projector, it comprises:
Penetrate the light supply apparatus of light;
According to the optic modulating device of picture signal to modulating from the light of this light supply apparatus ejaculation;
The grenade instrumentation that light by the modulation of this optic modulating device is throwed; With
Any described screen from the claim 11～18 that image throwed that this grenade instrumentation penetrates.
20. an image display device, it comprises:
Penetrate the light supply apparatus of light;
Make the scanning element that scans from the laser of this light supply apparatus ejaculation; With
By any described screen in the claim 11～18 that light throwed of this scanning element scanning.
CNA2007101089192A 2006-06-06 2007-06-04 Screen, projector, and image display device Pending CN101097396A (en)

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JP157042/2006 2006-06-06
JP2006157041A JP4201021B2 (en) 2006-06-06 2006-06-06 Screen, projector and image display device

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