JP2008191533A - Image display system, screen and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the scintillation of the whole screen by effectively vibrating the whole screen, then, to present a high-quality image to an observer. <P>SOLUTION: The screen 50 includes a vibration generating part 55 that generates the vibration in a diffusion part 51 through fixing members 52a and 52b functioning as a fixing part. The projector 10 includes a cooling fan 18 for cooling the heat generated in a projection part, and a duct 20 for guiding the wind from the cooling fan 18 to the vibration generating part 55, functioning as a vibration power part. The power to generate the vibration is given by sending the wind from the cooling fan 18 to the vibration generating part 55. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image display system, a screen, and a projector.

  When an image composed of light modulated in accordance with an image signal is displayed on a screen, scintillation in which bright spots and dark spots are randomly distributed may occur due to light interference. This scintillation makes the viewer of the image uncomfortable because the entire screen appears to glare. When a laser is used as a light source, scintillation is particularly likely to occur because the laser light has high coherence. As a technique for reducing scintillation, for example, Patent Document 1 below proposes a technique for causing a screen to vibrate by flowing an airflow from a cooling fan between a plurality of screens.

JP-A-2005-107150

However, in the technique proposed in Patent Document 1 described above, although the local vibration of the screen can be realized by the airflow from the cooling fan, the entire screen has not been effectively vibrated. For this reason, in terms of reducing the scintillation of the entire screen, the effect is limited and there is a problem in terms of practicality.
An object of the present invention is to provide a high-quality image to an observer by effectively vibrating the entire screen to reduce scintillation of the entire screen.

  The projector according to the present invention projects light in accordance with an image signal onto a screen having a diffusing unit that diffuses incident light and a fixing unit that is attached to the diffusing unit and movably fixes the diffusing unit. The projector includes: a projection unit that projects light onto the diffusion unit of the screen; and a vibration power unit that applies power for generating vibrations in the diffusion unit of the screen.

  According to the projector of the present invention, the fixing unit for slidably fixing the diffusing unit is attached to the diffusing unit of the screen, and the projector generates vibration in the diffusing unit via the fixing unit. A vibration power unit for applying power is provided. Since power for generating vibration from the projector to the diffusion unit is applied to the diffusion unit that can swing from the vibration power unit via the fixed unit, vibration can be effectively generated from the fixed unit to the entire screen. Can do. Thereby, scintillation of the entire screen can be effectively reduced, and a high-quality image can be provided to the observer.

  In the projector according to the present invention described above, the vibration power unit includes a cooling fan for cooling the projection unit, and a duct for guiding the wind from the cooling fan to the screen. The vibration power unit applies power for generating vibration to the diffusion unit of the screen by blowing air from the cooling fan from the duct to the screen.

  According to this projector, the duct guides the wind from the cooling fan to the screen. Since power for generating vibration in the screen diffusing portion can be obtained by using the wind from the cooling fan, a dedicated drive device for generating vibration is not required. As a result, it is possible to reduce the scintillation by generating vibrations on the screen at a low cost.

  In the projector according to the present invention described above, the vibration power unit includes at least one drive unit that applies power for generating vibration to the diffusion unit of the screen via the fixing unit of the screen, and the drive unit. And at least one transmission member for transmitting the applied power to the fixed portion of the screen.

  According to this projector, the drive unit applies power to the screen for generating vibrations in the screen diffusion unit. And a transmission member transmits the motive power from this drive part to the fixing | fixed part of a screen. For this reason, it is possible to obtain power for generating vibrations in the screen diffusing unit from the driving unit provided in the projector through the transmission member and the screen fixing unit. Thus, a desired vibration can be stably transmitted from the projector side to the screen side, and a dedicated driving device or the like for generating the vibration on the screen side is not required. Thereby, it is possible to reliably realize the reduction of scintillation by generating vibration on the screen at low cost.

  In the projector according to the present invention described above, the driving unit includes a rotating unit that performs a rotating motion, and the rotating unit causes the rotating unit to perform a rotating motion on the diffusion unit of the screen via the transmission member and the fixing unit of the screen. It is characterized by giving.

  In the projector according to the present invention described above, the driving unit includes a reciprocating rotating unit that performs reciprocating rotating motion, and the reciprocating rotating unit causes the screen to diffuse through the transmitting member and the screen fixing unit. It is characterized by giving a back-and-forth motion.

  In the projector according to the present invention described above, the driving unit includes a reciprocating linear part that performs a reciprocating linear motion by electromagnetic driving, and the reciprocating linear part allows the screen to be moved through the transmission member and the screen fixing part. A back-and-forth motion is imparted to the diffusion portion.

  In the projector according to the present invention described above, the driving unit includes a rotating unit that performs a rotating motion, and the rotating unit causes the screen diffusing unit to move back and forth through the transmission member and the screen fixing unit. It is characterized by giving.

  In the projector according to the present invention described above, the drive unit is driven at a frequency of 60 Hz or more.

  The screen according to the present invention includes a diffusing unit that diffuses incident light, and a fixing unit that is attached to the diffusing unit and fixes the diffusing unit so that the diffusing unit is slidable, and projects the light onto the diffusing unit. A projector having a power unit is provided with power for generating vibration in the diffusion unit through the fixed unit.

  According to the screen of the present invention, the fixing portion is attached to the diffusing portion so as to be able to swing the diffusing portion. The projector applies power for generating vibrations to the diffusing unit via the fixed unit. Since power for generating vibrations from the projector to the diffusing unit is applied to the diffusing unit that can swing through the fixing unit, vibration can be effectively generated from the fixing unit to the entire screen. Thereby, scintillation of the entire screen can be effectively reduced, and a high-quality image can be provided to the observer.

  In the screen according to the present invention described above, the projector has a vibration generating unit that generates vibrations through the fixing unit, and the projector has power for generating vibrations in the diffusion unit of the screen. A wind from a cooling fan for cooling the projection unit is applied by being blown to a vibration generation unit of the screen through a duct.

  According to this screen, the vibration generating unit generates vibration in the diffusion unit through the fixed unit. Further, the wind from the cooling fan of the projector is guided to the vibration generating unit through the duct. Since power for generating vibration in the diffusing unit can be obtained by using wind from the cooling fan of the projector, a dedicated drive device for generating vibration is not required. As a result, it is possible to reduce the scintillation by generating vibrations on the screen at a low cost.

  In the above-described screen according to the present invention, the vibration generating unit generates vibration by a vibration fan that receives the wind from the duct and moves eccentrically.

  In the above-described screen according to the present invention, the vibration generating unit generates vibration by a louver that swings in response to wind from the duct.

  The above-described screen according to the present invention is characterized in that it has a swing support portion that is attached to the fixed portion and supports the diffusion portion so as to be swingable.

  In the screen according to the present invention described above, the swing support portion is an elastic member having elasticity.

  An image display system according to the present invention includes a screen and a projector that projects light according to an image signal onto the screen. The screen is attached to the diffusion unit that diffuses incident light, and the diffusion unit. A fixing unit configured to fix the diffusion unit so as to be able to swing, and the projector vibrates to the diffusion unit of the screen via the projection unit that projects light onto the diffusion unit of the screen and the fixing unit of the screen. And a vibration power unit that applies power for generating the power.

  In the above-described image display system according to the present invention, the screen includes a vibration generation unit that generates vibrations in the diffusion unit via the fixed unit, and the projector serves as the vibration power unit in the projection unit. A cooling fan for cooling the generated heat, and a duct for guiding the wind from the cooling fan to the vibration generating part of the screen, and the vibration power part of the projector is connected to the diffusion part of the screen Power for generating vibration is applied by blowing wind from the cooling fan from the duct to the vibration generating portion of the screen.

(First embodiment)
Hereinafter, an image display system according to a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of an image display system according to the first embodiment of the present invention. As shown in FIG. 1, the image display system 1 includes a projector 10 and a screen 50.

First, a schematic configuration of the projector 10 will be described.
The projector 10 is a front projection type projector that projects light according to an image signal, and performs proximity projection from a position close to the screen 50 to be irradiated. The projector 10 houses the projection unit 11 and the cooling unit 19 in a housing 15. The projection unit 11 includes an optical engine 12, a projection lens 13, and an aspherical mirror 14, and projects light, which is modulated and synthesized according to an image signal in the optical engine 12, onto an irradiated surface of the screen 50.

  FIG. 2 is a diagram showing a schematic configuration of the optical engine. The red (R) light source unit 21R is a light source unit that supplies R light, and is a semiconductor laser that supplies laser light. The diffractive optical element 22 shapes and enlarges the illumination area by diffracting the laser light. The diffractive optical element 22 also makes the light amount distribution of the laser light uniform. As the diffractive optical element 22, for example, a computer generated hologram (CGH) can be used. The R light from the diffractive optical element 22 is collimated by the collimator lens 23 and then enters the R light spatial light modulator 24R. The R light spatial light modulator 24R is a spatial light modulator that modulates R light according to an image signal, and is a transmissive liquid crystal display device. The R light modulated by the R light spatial light modulator 24R is incident on a cross dichroic prism 25 which is a color synthesis optical system.

  The green (G) light source unit 21G is a light source unit that supplies G light, and is a semiconductor laser that supplies laser light. The G light from the diffractive optical element 22 is collimated by the collimator lens 23 and then enters the G light spatial light modulation device 24G. The G light spatial light modulation device 24G is a spatial light modulation device that modulates G light according to an image signal, and is a transmissive liquid crystal display device. The G light modulated by the G light spatial light modulator 24G is incident on the cross dichroic prism 25 from the side different from the R light.

  The blue (B) light source unit 21B is a light source unit that supplies B light, and is a semiconductor laser that supplies laser light. The B light from the diffractive optical element 22 is collimated by the collimator lens 23 and then enters the B light spatial light modulation device 24B. The spatial light modulator for B light 24B is a spatial light modulator that modulates B light according to an image signal, and is a transmissive liquid crystal display device. The B light modulated by the B light spatial light modulation device 24B is incident on the cross dichroic prism 25 from a different side from the R light and the G light.

  As each color light source unit 21R, 21G, and 21B, a semiconductor laser pumped solid state (Diode Pumped Solid State, DPSS) laser, a solid laser, a liquid laser, a gas laser, or the like can be used. Each color light source unit 21R, 21G, and 21B may use a wavelength conversion element that converts the wavelength of the laser light, for example, a second-harmonic generation (SHG) element. As the transmissive liquid crystal display device, for example, a high temperature polysilicon TFT liquid crystal panel (HTPS) can be used.

  The cross dichroic prism 25 has two dichroic films arranged so as to be substantially orthogonal to each other. The first dichroic film 26 reflects R light and transmits G light and B light. The second dichroic film 27 reflects B light and transmits R light and G light. The cross dichroic prism 25 combines the R light, G light, and B light incident from different sides and emits the light toward the projection lens 13. The projection lens 13 projects the light synthesized by the cross dichroic prism 25.

  The optical engine 12 is not limited to the case where a transmissive liquid crystal display device is used as the spatial light modulator. As the spatial light modulator, a reflective liquid crystal display device (Liquid Crystal On Silicon: LCOS), a DMD (Digital Micromirror Device), a GLV (Grating Light Valve), or the like may be used. The projector 10 is not limited to a configuration including a spatial light modulator for each color light. The projector 10 may be configured to modulate two or three or more color lights with one spatial light modulator. Further, the projector 10 may be configured to display an image by scanning the laser light from the optical engine 12 on the irradiated surface of the screen 50 by a scanning unit.

  Returning to FIG. 1, the aspherical mirror 14 is provided at a position facing the projection lens 13. The aspherical mirror 14 has a function of widening the light from the projection lens 13 and a function of bending the light from the projection lens 13 and traveling in the direction of the screen 50. The projection lens 13 and the aspherical mirror 14 perform image enlargement and image formation on the screen 50.

  FIG. 3 is a schematic diagram showing an optical system of the projector. The projection lens 13 and the aspherical mirror 14 are arranged so that their optical axes are substantially coincident. The normal line N of the screen 50 is substantially parallel to the optical axis of the projection lens 13 and the optical axis of the aspherical mirror 14. The projection lens 13, the aspherical mirror 14 and the screen 50 all constitute a so-called coaxial optical system having a common optical axis AX. The projector 10 constitutes a so-called shift optical system that shifts light modulated according to the image signal to a specific side with respect to the optical axis AX and advances the light.

  Specifically, the light modulated in accordance with the image signal is shifted upward with respect to the optical axis AX toward FIG. On the other hand, the center normal of the image plane virtually formed on the exit surface of the cross dichroic prism 24 in the optical engine 12 is parallel to the optical axis AX and opposite to a specific side, that is, light. Shifting downward with respect to the axis AX toward FIG. With such a configuration, the projection unit 11 makes light having a large incident angle incident on the screen 50. The incident angle is an angle formed by the normal line N of the screen 50 and the incident light beam.

  Returning to FIG. 1, the cooling unit 19 is provided on the screen 50 side in the housing 15, and includes a cooling fan 18. The cooling fan 18 rotates the blade member about the central axis to exhaust the heat generated in the projection unit 11 to the outside of the housing 15 and cool the inside of the housing 15. One opening surface of the duct 20 is attached to the exhaust port of the cooling fan 18 in the housing 15, and the other opening surface is disposed so as to face a vibration generating unit 55 described later of the screen 50. The cooling fan 18 and the duct 20 are configured as a vibration power unit of the projector 10.

Next, a schematic configuration of the screen 50 will be described.
FIG. 4 is a perspective view illustrating a schematic configuration of the image display system according to the first embodiment. The screen 50 is a reflective screen that reflects the projected light. As shown in the figure, the screen 50 includes a diffusion part 51, two fixing members 52 a and 52 b, two support members 53 a and 53 b, and a vibration generating part 55.

  The diffusing unit 51 reflects the light projected from the projection unit 11 of the projector 10. At this time, the diffusing unit 51 diffuses the projected light to widen the visual field range of the observer. The fixing members 52a and 52b as fixing portions are attached along the upper and lower (Y direction) ends of the diffusing portion 51, and fix the entire diffusing portion 51 so as to be able to swing. Near the left and right (X direction) both ends of the fixing member 52a attached to the upper end of the diffusing portion 51, support members 53a and 53b such as wires are attached as swing support portions. The diffusion part 51 is slidably attached to the ceiling 100 shown in FIG. 1 via these support members 53a and 53b. That is, the screen 50 is suspended from the ceiling 100 by the support members 53a and 53b.

  In the present embodiment, an example in which the screen 50 is directly attached to the ceiling 100 has been described. However, the present invention is not limited to this, and the screen 50 is attached to, for example, a stand or a bracket for ceiling suspension via support members 53a and 53b. It may be attached and hung. Further, the configuration of the fixing members 52a and 52b as the fixing portions, such as the number of members and the attachment positions, is not limited to this, and any configuration may be used as long as the entire diffusing portion 51 can be slidably fixed. Further, the configuration of the support members 53a and 53b as the swing support portions, such as the number of members and attachment positions, is not limited to this, and any configuration may be used as long as the diffuser 51 can be swingably supported.

  The vibration generating unit 55 is attached to a substantially central position of the fixing member 52b attached to the lower end portion of the diffusing unit 51 so that the upper surface of the vibration generating unit 55 is in contact with the lower surface of the fixing member 52b. Each of the front and rear (Z direction) surfaces of the vibration generating unit 55 is an opening surface. One opening surface of the duct 20 is opposed to the front surface of the vibration generating unit 55, and the exhaust air from the cooling fan 18 of the projector 10 is guided to the duct 20 and opened from the front surface to the rear surface of the vibration generating unit 55. It is blown to the surface. The wind from the duct 20 becomes power for the vibration generating unit 55 to cause the diffusion unit 51 to generate vibration. Here, by attaching the vibration generating part 55 to the substantially central position of the fixing member 52b, it becomes easy to apply uniform vibration to the entire diffusion part 51. The two opening surfaces of the vibration generating unit 55 are not limited to the front and rear (Z direction) surfaces, and may be, for example, left and right (X direction) surfaces. At this time, one opening surface of the duct 20 is disposed so as to face either of the left and right opening surfaces.

  FIG. 5 is a schematic diagram illustrating an example of a vibration generating unit using a fan. As shown in the figure, the vibration generating unit 55 houses a vibration fan 61 for generating vibrations in the housing 62. Two front and rear surfaces (Z direction) of the housing 62 are open. When the front surface of the casing 62 facing one opening surface of the duct 20 is the opening surface 62a, and the rear surface on the opposite side is the opening surface 62b, the wind D from the duct 20 enters from the opening surface 62a to the opening surface 62b. Exit. The vibration fan 61 in the housing 62 rotates eccentrically about the rotation axis L by the air flow at that time. In the example shown in the figure, the vibration fan 61 rotates clockwise toward the figure. However, the vibration fan 61 may rotate counterclockwise.

  FIG. 6 is a schematic diagram illustrating an example of a vibration fan. In the example shown in FIG. 6A, the vibration fan 61 has four blades, the right blade is long in the horizontal direction toward the same figure, and conversely the left blade is horizontal in the drawing. short. For this reason, the center position of the whole vibration fan 61 and the position of the rotation axis L are shifted, and the vibration fan 61 rotates eccentrically. In the example shown in FIG. 5B, the vibration fan 61 has three blades, and these blades are biased to the right side in the drawing. For this reason, the weight balance of the vibration fan 61 in the rotation axis L is biased, and the vibration fan 61 rotates eccentrically.

  As in the example described above, the vibration fan 61 receives the wind D from the duct 20 and rotates eccentrically about the rotation axis L. Due to this eccentric rotation, the housing 62 continuously vibrates in a direction orthogonal to the rotation axis L via a connecting member (not shown) between the vibration fan 61 and the housing 62. The vibration of the housing 62 is transmitted to the diffusing unit 51 through the fixing member 52b in contact with the housing 62. As a result, the diffusing unit 51 continuously vibrates in a direction orthogonal to the rotation axis L, that is, in a two-dimensional direction up and down and left and right (XY direction) toward the surface of the diffusing unit 51. The shape of the vibration fan and the method of eccentric rotation are not limited to the above example. For example, the fan may be rotated by receiving the wind D from the duct 20, and the eccentric weight component attached separately from the fan may be eccentrically rotated by the rotational power of the fan.

  FIG. 7 is a schematic diagram illustrating an example of a vibration generating unit using a louver. As shown in the figure, the vibration generating unit 55 houses a vibration generating louver 71 composed of a plurality of blade members 72 inside a housing 62. Two front and rear surfaces (Z direction) of the housing 62 are open. When the front surface of the casing 62 facing one opening surface of the duct 20 is the opening surface 62a, and the rear surface on the opposite side is the opening surface 62b, the wind D from the duct 20 enters from the opening surface 62a to the opening surface 62b. Exit. Each blade member 72 in the housing 62 vibrates in response to the air flow at that time.

  FIG. 8 is a plan view for explaining vibration by the louver. In the figure, the louver 71 is viewed from above. The wind D entering from the opening surface 62a collides with each wind receiving surface 72a of each blade member 72, changes its direction, and escapes to the opening surface 62b. At that time, upward force and rightward force are applied to each blade member 72 toward the same figure. These forces are transmitted to the diffusing unit 51 via a connecting member (not shown) between the louver 71 and the casing 62, the casing 62, and a fixing member 52b in contact with the casing 62. Subsequently, due to the tension of the diffusing unit 51, a force opposite to the force transmitted first is transmitted from the diffusing unit 51 to the fixing member 52 b, the casing 62, the connecting member, and the louver 71. The diffusing unit 51 continuously vibrates in the front-rear direction (Z direction) and the lateral direction (X direction) toward the surface of the diffusing unit 51 by repeating transmission of these mutual forces.

  As described above, in the image display system 1 according to the present embodiment, the exhaust from the cooling fan 18 of the projector 10 is guided by the duct 20 and is blown to the opening surface of the vibration generating unit 55 of the screen 50. The vibration generating unit 55 uses this wind as power for generating vibration, and gives continuous vibration to the diffusion unit 51. Due to this continuous vibration, the interference point of the light projected and reflected on the diffusing portion 51 changes, and the coherence of the light decreases. Thereby, scintillation can be reduced and a high quality image can be provided to the observer of the screen 50.

  Further, since the exhaust from the cooling fan 18 of the projector 10 is used as power for generating vibration, it is not necessary to newly provide a dedicated drive device for generating vibration. Thereby, it is possible to reduce scintillation at low cost. Further, power consumption for generating vibration can be suppressed. Further, since the vibration generating unit 55 generates vibration using a simple mechanism such as the vibration fan 61 or the vibration generating louver 71, it is possible to reduce scintillation without requiring a complicated mechanism. Can be realized at a cost.

  Further, fixing members 52a and 52b are attached to the diffusing portion 51, and the entire diffusing portion 51 is fixed so as to be swayable. Since the vibration from the vibration generating unit 55 to the diffusing unit 51 is transmitted through the fixing member 52b, the vibration can be effectively transmitted uniformly throughout the diffusing unit 51.

  In addition, since the projector 10 having power for generating vibration and the screen 50 are not connected to each other and are separately disposed, installation work can be performed without trouble in moving each installation location. can do.

(Second Embodiment)
Hereinafter, an image display system according to a second embodiment of the present invention will be described with reference to the drawings.

  FIG. 9 is a diagram showing a schematic configuration of an image display system according to the second embodiment of the present invention. As shown in the figure, the image display system 2 includes a projector 10 and a screen 50 as in the image display system 1 according to the first embodiment.

  Similar to the image display system 1 according to the first embodiment, the projector 10 is a front projection type projector that projects light according to an image signal, and performs proximity projection from a position close to the screen 50 to be irradiated. . The projector 10 houses the projection unit 11 and the drive unit 30 in the housing 15, unlike the case according to the first embodiment. Since the projection unit 11 has the same configuration and function as in the case of the first embodiment, the description thereof is omitted.

The drive unit 30 is provided on the upper wall surface in the housing 15. Here, the drive unit 30 is driven at a frequency of 60 Hz or more. If the frequency is 60 Hz or more, vibration that reduces scintillation can be generated without causing the observer of the screen 50 to feel an afterimage. Note that the motor or the like that is driven by the drive unit 30 may also be used as a motor or the like that is used in another drive mechanism in the projector 10.
The driving unit 30 and the fixing member 52 b attached to the lower end of the diffusing unit 51 of the screen 50 are connected to each other by a transmission member 40 that transmits power from the driving unit 30 to the screen 50. Here, the transmission member 40 uses, for example, a linear connecting member having no elasticity such as a wire. Note that, as the transmission member 40, a rod-like connection member or the like may be used instead of a linear connection member.

  FIG. 10 is a perspective view illustrating a schematic configuration of an image display system according to the second embodiment. As shown in the figure, the screen 50 includes a diffusion portion 51, two fixing members 52a and 52b, and two support members 53a and 53b. Since the diffusing part 51, the fixing members 52a and 52b, and the supporting members 53a and 53b have the same configuration and function as those according to the first embodiment, description thereof is omitted. The transmission member 40 is detachably attached to a substantially central position of a fixing member 52b attached to the lower end portion of the diffusing portion 51, and connects the driving portion 30 of the projector 10 and the fixing member 52b of the screen 50 to each other. To do.

  FIG. 11 is a schematic diagram illustrating an example of a drive unit that is used with a disk member surface arranged in parallel with a diffusion unit surface. As shown in the figure, a housing 81 of the drive unit 30 houses a motor 81 and a disk-shaped disk member 82 connected to the motor 81 and rotating clockwise or counterclockwise. The motor 81 and the disk member 82 are configured to perform a rotating motion as a rotating portion. The disk member 82 is disposed so that the surface thereof is substantially parallel to the surface of the diffusing portion 51 of the screen 50. One of the transmission members 40 is attached near the outer periphery of the disk member 82 surface. The other of the transmission members 40 is attached to the fixing member 52b of the screen 50, and connects the disk member 82 and the fixing member 52b to each other. Further, the casing 80 is provided with a hole 81a through which the transmission member 40 is passed in order to transmit the motion of the disk member 82 to the fixed member 52b. Similarly, the casing 15 of the projector 10 shown in FIG. 9 is also provided with a hole (not shown) through which the transmission member 40 is passed. Further, here, as the support members 53a and 53b for suspending the screen 50, elastic members such as a spring and a rubber material are used.

  FIG. 15 is a diagram for explaining the vibration of the screen. FIG. 4A is a diagram of a drive unit that uses a disk member surface arranged in parallel to a diffusion unit surface. As shown in FIG. 5A, when the motor 81 is driven, the connected disk member 82 rotates about the Z direction. At this time, since the transmission member 40 is attached near the outer periphery of the surface of the disk member 82, the rotational motion is transmitted from the transmission member 40 to the fixing member 52b substantially parallel to the surface of the disk member 82. The transmitted rotational motion is transmitted to the diffusing portion 51 through the fixing member 52b, and a rotational motion is generated in the diffusing portion 51 so as to draw a circular orbit substantially parallel to the surface of the disk member 82. The diffusing unit 51 swings with this rotational movement, and continuously vibrates in the two-dimensional direction of the upper and lower sides and the right and left (XY directions) of the surface of the diffusing unit 51.

  FIG. 12 is a schematic diagram illustrating an example of a drive unit using a reel member. As shown in the figure, a housing 81 of the drive unit 30 houses a motor 81 and a reel-shaped reel member 83 that is connected to the motor 81 and rotates clockwise and counterclockwise. The motor 81 and the reel member 83 are configured to perform a reciprocating rotational movement as a reciprocating rotational part. One of the transmission members 40 is attached to the reel member 83 so as to be capable of winding and unwinding. The other of the transmission members 40 is attached to the fixing member 52b of the screen 50, and connects the reel member 83 and the fixing member 52b to each other. Similarly to the case of FIG. 11, the housing 80 is provided with a hole 81 a through which the transmission member 40 is passed. Further, here, as the supporting members 53a and 53b for suspending the screen 50, members having no elasticity such as wires are used.

  FIG. 15B is a diagram of a driving unit using a reel member. As shown in FIG. 5B, by controlling the driving of the motor 81, the reel member 83 alternately repeats reciprocating rotational movements that perform forward rotation and reverse rotation, thereby winding and unwinding the transmission member 40. Alternately. Accordingly, the transmission member 40 is repeatedly pulled and released, and the transmission member 40 reciprocates in the Z direction. Here, the diffusing portion 51a indicated by a solid line is a position when the transmission member 40 is extended and released. On the other hand, the diffusing portion 51b indicated by a broken line is a position when the transmission member 40 is wound and pulled. As described above, the back-and-forth movement of the transmission member 40 transmits the back-and-forth (Z direction) motion to the diffusing portion 51 through the fixed member 52b. The diffusion unit 51 swings as the transmitted back-and-forth movement is repeated, and continuously vibrates in the front-rear direction (Z direction) toward the surface of the diffusion unit 51.

  FIG. 13 is a schematic diagram illustrating an example of a drive unit using electromagnetic drive. As shown in the figure, in the housing 80 of the drive unit 30, a coil spring 84 fixed to the housing 80, an electromagnet 85 connected to the other of the coil spring 84, and an attracting position of the electromagnet 85 The permanent magnet 86 disposed in the housing is stored in an inclined state. The coil spring 84, the electromagnet 85, and the permanent magnet 86 are configured to perform a reciprocating linear motion as a reciprocating linear portion. One of the transmission members 40 is attached to the permanent magnet 86. The other of the transmission members 40 is attached to the fixing member 52b of the screen 50, and connects the permanent magnet 86 and the fixing member 52b to each other. Similarly to the case of FIG. 11, the housing 80 is provided with a hole 81 a through which the transmission member 40 is passed. Further, here, as the supporting members 53a and 53b for suspending the screen 50, members having no elasticity such as wires are used.

  FIG. 15C is a diagram in the case of a drive unit using electromagnetic drive. As shown in FIG. 5C, the electromagnet 85 and the permanent magnet 86 are repeatedly attracted and separated by the restoring force of the coil spring 84 by repeatedly energizing and de-energizing the electromagnet 85. Accordingly, the transmission member 40 is repeatedly pulled and released, and the transmission member 40 reciprocates in the Z direction. Here, the diffusing portion 51a indicated by a solid line is a position when the electromagnet 85 is de-energized, the electromagnet 85 and the permanent magnet 86 are separated, and the transmission member 40 is released. On the other hand, the diffusing portion 51b shown by a broken line is a position when the electromagnet 85 is energized, the electromagnet 85 and the permanent magnet 86 are attracted, and the transmission member 40 is pulled. As described above, the back-and-forth movement of the transmission member 40 transmits the back-and-forth (Z direction) motion to the diffusing portion 51 through the fixed member 52b. The diffusion unit 51 swings as the transmitted back-and-forth movement is repeated, and continuously vibrates in the front-rear direction (Z direction) toward the surface of the diffusion unit 51.

  FIG. 14 is a schematic diagram showing an example of a drive unit that is used by arranging the disk member surface so as to be orthogonal to the diffusion unit surface. As shown in the figure, a housing 81 of the drive unit 30 houses a motor 81 and a disk-shaped disk member 87 connected to the motor 81 and rotating clockwise or counterclockwise. The motor 81 and the disk member 87 are configured to perform a rotational motion as a rotating part. The disk member 87 is disposed so that its surface is substantially orthogonal to the surface of the diffusing portion 51 of the screen 50. One of the transmission members 40 is attached near the outer periphery of the disk member 87 surface. The other of the transmission members 40 is attached to the fixing member 52b of the screen 50, and connects the disk member 87 and the fixing member 52b to each other. Similarly to the case of FIG. 11, the housing 80 is provided with a hole 81 a through which the transmission member 40 is passed. Further, here, as the supporting members 53a and 53b for suspending the screen 50, members having no elasticity such as wires are used.

  FIG. 15 (d) is a diagram of a drive unit that is used by arranging the disk member surface so as to be orthogonal to the diffusion unit surface. As shown in FIG. 4D, when the motor 81 is driven, the connected disk member 87 rotates about the X direction. At this time, since the transmission member 40 is attached near the outer periphery of the surface of the disk member 87, the transmission member 40 is repeatedly pulled and released as the disk member 87 rotates. Move back and forth in the direction. Here, the diffusing portion 51a indicated by a solid line is a position when the transmission member 40 is released. On the other hand, the diffusing portion 51b shown by a broken line is a position when the transmission member 40 is pulled. As described above, the back-and-forth movement of the transmission member 40 transmits the back-and-forth (Z direction) motion to the diffusing portion 51 through the fixed member 52b. The diffusion unit 51 swings as the transmitted back-and-forth movement is repeated, and continuously vibrates in the front-rear direction (Z direction) toward the surface of the diffusion unit 51.

  As described above, in the image display system 2 according to the present embodiment, the driving unit 30 of the projector 10 has power for causing the diffusion unit 51 of the screen 50 to generate vibration. In addition, the power from the drive unit 30 is transmitted to the diffusion unit 51 via the transmission member 40 and the fixing member 52 b of the screen 50. Since power for generating vibration is provided on the projector 10 side, there is no need to provide a dedicated drive device for generating vibration on the screen 50 side. As a result, a screen for reducing scintillation can be created with a small measure such as attaching a fixing member to a conventional screen as a base. Further, for example, when various types of screens corresponding to various uses of the user are created, various types of screens corresponding to scintillation reduction can be created at low cost.

  Further, in the example of the driving unit shown in FIG. 11, the diffusing unit 51 is continuously vibrated in the two-dimensional directions of upper, lower, left and right by transmitting the rotational motion to the diffusing unit 51 of the screen 50. Since the rotational motion is transmitted to the diffusing unit 51 and vibrated, the diffusing unit 51 can be vibrated stably without generating discontinuous points in the vibration. Thereby, scintillation can be reduced stably and reliably.

  Further, the support members 53a and 53b for suspending the screen 50 are elastic members that can expand and contract. For this reason, the force transmitted to the support members 53a and 53b is repelled again by the diffusion part 51 by the elastic force of the support members 53a and 53b. Thereby, the spreading | diffusion part 51 can be vibrated more efficiently with the force repelled from support member 53a, 53b.

  In the example of the drive unit shown in FIGS. 12 to 14, the diffusion unit 51 is continuously vibrated in the front-rear direction by transmitting the back-and-forth motion to the diffusion unit 51 of the screen 50. In this case, the support members 53a and 53b for suspending the screen 50 are support members 53a and 53b having no elasticity. For this reason, since a general wire etc. can be used for support members 53a and 53b, the screen for reducing scintillation can be created more and more simply.

(Modification)
In the second embodiment described above, one drive unit 30 is accommodated in the casing 15 of the projector 10, and the drive unit 30 and the fixing member 52 b of the screen 50 are connected using one transmission member 40. However, the number of the drive parts 30 accommodated in the housing | casing 15 and the number of the transmission members which connect the drive part 30 and the fixing member 52b are not restricted to this. FIG. 16 is a perspective view illustrating a schematic configuration of an image display system having a plurality of drive units and a plurality of transmission members. As shown in the figure, the image display system 3 houses two drive units 30 a and 30 b in a housing 15 of the projector 10. The drive units 30a and 30b and the fixing member 52b of the screen 50 are connected by using two transmission members 40a and 40b attached to the drive units 30a and 30b, respectively. Then, power for generating vibration in the diffusing unit 51 is transmitted from the drive units 30a and 30b via the transmission members 40a and 40b and the fixing member 52b of the screen 50. Thereby, when transmitting the power for generating the vibration to the diffusion unit 51, the power can be transmitted uniformly without distorting the diffusion unit 51, and the scintillation can be stably and reliably reduced.
In the case of the figure, power for generating vibration by storing two drive units 30a and 30b in the housing 15 is transmitted. For example, one drive unit is stored in the housing 15. And you may transmit motive power by attaching a some transmission member to this drive part.

1 is a diagram showing a schematic configuration of an image display system according to a first embodiment of the present invention. The figure which shows schematic structure of an optical engine. The schematic diagram which shows the optical system of a projector. 1 is a perspective view showing a schematic configuration of an image display system according to a first embodiment. The schematic diagram which shows the example of the vibration generation part using a fan. The schematic diagram which shows the example of a vibration fan. The schematic diagram which shows the example of the vibration generation part using a louver. The top view for demonstrating the vibration by a louver. The figure which shows schematic structure of the image display system which concerns on 2nd Embodiment of this invention. The perspective view which shows schematic structure of the image display system which concerns on 2nd Embodiment. The schematic diagram which shows the example of the drive part used by arrange | positioning a disk member surface in parallel with a diffusion part surface. The schematic diagram which shows the example of the drive part using a reel member. The schematic diagram which shows the example of the drive part using electromagnetic drive. The schematic diagram which shows the example of the drive part used by arrange | positioning a disk member surface so that it may orthogonally cross a diffusion part surface. The figure for demonstrating the vibration of a screen. The perspective view which shows schematic structure of the image display system which has a some drive part and a some transmission member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2, 3 ... Image display system, 10 ... Projector, 11 ... Projection part, 12 ... Optical engine, 13 ... Projection lens, 14 ... Aspherical mirror, 15 ... Housing, 18 ... Cooling fan, 19 ... Cooling part, DESCRIPTION OF SYMBOLS 20 ... Duct, 30 ... Drive part, 40 ... Transmission member, 50 ... Screen, 51 ... Diffusion part, 52a, 52b ... Fixed member, 53a, 53b ... Support member, 55 ... Vibration generating part, 61 ... Vibration fan, 62 ... Housing, 62a, 62b ... Opening surface, 71 ... Louver, 72 ... Blade member, 72a ... Wind receiving surface, 80 ... Housing, 81 ... Motor, 81a ... Hole, 82 ... Disc member, 83 ... Reel member, 84 Coil spring, 85 electromagnet, 86 permanent magnet, 87 disk member, 100 ceiling.

Claims (16)

A projector for projecting light according to an image signal on a screen having a diffusing unit that diffuses incident light and a fixing unit that is attached to the diffusing unit and movably fixes the diffusing unit,
A projection unit that projects light onto the diffusion unit of the screen;
A projector having a vibration power unit that applies power for generating vibration to the diffusion unit of the screen. The projector, as the vibration power unit, a cooling fan for cooling the projection unit,
A duct for guiding wind from the cooling fan to the screen,
2. The projector according to claim 1, wherein the vibration power section of the projector provides power for generating vibration in the diffusion section of the screen by blowing wind from the cooling fan from the duct to the screen. Projector. The projector includes, as the vibration power unit, at least one drive unit that applies power for generating vibration to the diffusion unit of the screen via the fixing unit of the screen;
The projector according to claim 1, further comprising at least one transmission member that transmits power applied by the driving unit to a fixing unit of the screen. The driving unit of the projector has a rotating unit that performs a rotating motion,
The projector according to claim 3, wherein the rotating unit imparts a rotational motion to the diffusing unit of the screen via the transmission member and the fixing unit of the screen. The drive unit of the projector has a reciprocating rotary unit that performs a reciprocating rotary motion,
The projector according to claim 3, wherein the reciprocating rotation unit imparts a back-and-forth motion to the diffusing unit of the screen via the transmission member and the fixing unit of the screen. The drive unit of the projector has a reciprocating linear part that performs a reciprocating linear motion by electromagnetic drive,
The projector according to claim 3, wherein the reciprocating linear portion imparts a back-and-forth motion to the diffusing portion of the screen via the transmission member and the fixing portion of the screen. The driving unit of the projector has a rotating unit that performs a rotating motion,
The projector according to claim 3, wherein the rotating unit imparts a back-and-forth motion to the diffusing unit of the screen through the transmission member and the fixing unit of the screen.   The projector according to claim 3, wherein the driving unit of the projector is driven at a frequency of 60 Hz or more. A diffuser that diffuses incident light;
A fixing part that is attached to the diffusion part and slidably fixes the diffusion part;
From a projector having a projection unit that projects light onto the diffusion unit,
The screen is provided with power for generating vibration in the diffusion part through the fixing part. The screen has a vibration generating unit that generates vibration in the diffusion unit via the fixed unit,
Power for generating vibrations in the screen diffusing part is given by blowing air from a cooling fan for cooling the projection part of the projector through the duct to the vibration generating part of the screen. The screen according to claim 9, wherein:   The screen according to claim 10, wherein the vibration generating unit of the screen generates vibration by a vibration fan that moves eccentrically in response to wind from the duct.   The screen according to claim 10, wherein the vibration generating unit of the screen generates vibration by a louver that swings in response to wind from the duct.   The screen according to any one of claims 9 to 12, further comprising a swing support portion that is attached to the fixed portion and supports the diffusion portion so as to be swingable.   The screen according to claim 13, wherein the swing support portion of the screen is an elastic member having elasticity. Including a screen and a projector that projects light according to the image signal onto the screen,
The screen includes a diffusion unit that diffuses incident light;
A fixing part that is attached to the diffusion part and slidably fixes the diffusion part;
The projector includes a projection unit that projects light onto the diffusion unit of the screen;
An image display system comprising: a vibration power unit that applies power for generating vibration to the diffusion unit of the screen through the fixing unit of the screen. The screen has a vibration generating unit that generates vibration in the diffusion unit via the fixed unit,
The projector, as the vibration power unit, a cooling fan for cooling the heat generated in the projection unit,
A duct for guiding the wind from the cooling fan to the vibration generating part of the screen,
The vibration power unit of the projector provides power for generating vibration in the diffusion unit of the screen by blowing wind from the cooling fan from the duct to the vibration generation unit of the screen. The image display system according to claim 1.

Images