JP2016018130A - Optical device and projection type display device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical device that has enabled accurate projection of a projection image, and a projection type display device using the same.SOLUTION: A portrait unit U attachable to a projector P includes a folding mirror 81 that reflects light beams from the projector P. The portrait unit U further includes an upper base plate 98 that supports one end of the folding mirror 81 and can be fixed to one end of the projector P, and a lower base plate 99 that supports the other end of the folding mirror 81 and can be fixed to the other end of the projector P.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an optical device and a projection display device using the same, and more particularly to an optical device that enables portrait projection.

  In recent years, it has been desired that a projector (projection type display device) can perform so-called portrait projection in which a vertically long image such as a standing image of a person is projected on a floor surface. A configuration described in Patent Document 1 is known as such a projector.

  Patent Document 1 discloses a technique that enables portrait projection by placing a folding mirror on the front surface of a projection lens and attaches the folding mirror to a projector housing in a rotatable manner.

JP 2004-53976 A

  However, in the configuration disclosed in the above-mentioned patent document, only one end side of the folding mirror is attached to the projector casing. For this reason, backlash tends to occur, and it may be difficult to project a projection image with high accuracy.

  Therefore, an object of the present invention is to provide an optical device that can project a projection image with high accuracy and a projection display device using the optical device.

In order to achieve the above object, the optical device of the present invention comprises:
An optical device that can be mounted on a projection display device,
A reflecting member that reflects a light flux from the projection display device;
A first support member that supports one end side of the reflecting member and can be fixed to one end side of the projection display device;
A second support member that supports the other end side of the reflection member and can be fixed to the other end side of the projection display device.
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the optical apparatus which enabled the projection image to be projected with high precision, and a projection type display apparatus using the same can be provided.

The figure which shows the inside of the projector P in the Example of this invention. FIG. 2 is a plan view and a side view showing an optical configuration of a projector P in an embodiment of the present invention. The figure which looked at the external appearance of the projector P in the Example of this invention from the top | upper surface side. The figure which looked at the external appearance of the projector P in the Example of this invention from the bottom face side. The disassembled perspective view of the portrait unit U in 1st Example of this invention. The disassembled perspective view of the portrait unit U in 1st Example of this invention. The assembly drawing of the portrait unit U in 1st Example of this invention. The figure which shows the state in which the portrait unit U in 1st Example of this invention was attached to the projector P. FIG. The disassembled perspective view of the portrait unit U in 2nd Example of this invention.

  Preferred embodiments of the present invention will be illustratively described below with reference to the drawings. However, the relative arrangement of the component parts described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. In other words, the relative positions of the component parts are not stipulated for the purpose of limiting the scope of the present invention to the following embodiments.

[Description of Configuration of Projection Display Device]
FIG. 1 is a diagram showing the inside of a projector P in an embodiment of the present invention.

  A lamp 1 is a light source. Reference numeral 2 denotes a lamp holder for holding the lamp 1 and an explosion-proof convex lens 3 described later by a plurality of spring members (not shown). Reference numeral 3 denotes an explosion-proof convex lens having a function of collecting the light from the lamp 1. Reference numeral 4 denotes a lamp unit including the lamp 1, the lamp holder 2, the explosion-proof convex lens 3, and a plurality of members (not shown).

  A projection lens unit 5 projects an image on a screen (projected surface) (not shown). A projection lens optical system is housed in the projection lens unit 5. Reference numeral 6 denotes an optical box that houses the lamp unit 4 and an illumination optical system and a color separation / synthesis system, which will be described later, and to which the projection lens unit 5 is fixed.

  Reference numeral 7 denotes a power source. The power source 7 has an AC inlet (not shown). The power source 7 is incorporated in an outer case 17 described later and is electrically connected to the power source 7 to supply power to the housing. Reference numeral 8 denotes a ballast, which is a lighting power supply device for lighting the lamp 1. The ballast 8 is electrically connected to the power source 7 and the lamp 1.

  Reference numeral 9 denotes an optical cooling fan A that cools the color separation / combination optical element by exhausting air that has taken in outside air from an air inlet 17a provided in an outer case 17 described later. Reference numeral 10 denotes an optical cooling fan B that cools an optical element of the color separation / synthesis system by exhausting air that has taken in outside air from an intake port 17a provided in an outer case 17 described later. Reference numeral 11 denotes an optical cooling fan intake duct that holds the optical cooling fan 9 and the optical cooling fan 10, sucks outside air from an air inlet 17 a described later, and guides the air to the air inlet of the optical cooling fan 9 and the optical cooling fan 10. Reference numeral 13 denotes an exhaust fan, which cools the power supply 8 and the ballast 9 with air sucked by the exhaust fan 13, cools the lamp 1 and its surroundings with exhaust, and exhausts heat outside the housing through an exhaust port 17b described later. An exhaust fan holder 14 holds the exhaust fan 13.

  Reference numeral 15 denotes a lamp cooling fan. The lamp cooling fan 15 takes in air that has cooled the optical elements of the color separation / synthesis system, and cools the lamp 1 by exhaust. A lamp cooling duct 16 guides the air exhausted from the lamp cooling fan 15.

  Reference numeral 17 denotes an outer case, which includes a front intake port 17a for taking outside air into the housing and an exhaust port 17b for exhausting heat outside the housing. Reference numeral 18 denotes an air filter that suppresses dust from entering the casing when the outside air is sucked into the mounting casing in the vicinity of the intake port 17a.

  19 is equipped with a connector (interface) that captures various signals such as images and controls, and sends the driving of the liquid crystal panel, the lighting command to the lamp 1, and the driving commands to a plurality of fans by the power from the power source 7 described above. This is a drive / control board unit mainly used. The drive / control board unit 19 is connected to FPCs (Flexible Printed Circuits) from a liquid crystal panel arranged in the color separation / synthesis optical system.

  Reference numeral 20 denotes a polarization conversion element cooling fan that cools a polarization conversion element 45, which will be described later, by exhausting air after intake from the side air inlet 17a. The polarization conversion element cooling fan 20 is a sirocco fan. A polarization conversion element cooling duct 21 guides air exhausted from the polarization conversion element cooling fan 20.

  Next, the configuration of the optical system including the lamp 1, the illumination optical system, the color separation / synthesis optical system, and the projection lens unit 5 will be described with reference to FIG. 2A shows a horizontal section of the optical system, and FIG. 2B shows a vertical section.

  In the figure, reference numeral 41 denotes a discharge arc tube (hereinafter simply referred to as an arc tube) that emits white light in a continuous spectrum. Reference numeral 42 denotes a reflector having a concave mirror that condenses light from the arc tube 41 in a predetermined direction. The light source lamp 1 is constituted by the arc tube 41 and the reflector 42.

  Reference numeral 43a denotes a first cylinder array in which a plurality of cylindrical lens cells having refractive power in the horizontal direction shown in FIG. 43b is a second cylinder array having a plurality of cylindrical lens cells corresponding to the individual lens cells of the first cylinder array 43a. 44 is an ultraviolet absorption filter, and 45 is a polarization conversion element that converts non-polarized light into predetermined polarized light.

  Reference numeral 46 denotes a front compressor composed of a cylindrical lens having a refractive power in the vertical direction shown in FIG. Reference numeral 47 denotes a reflection mirror for bending the optical axis from the lamp 1 by approximately 90 degrees (more specifically, 88 degrees).

  43c is a third cylinder array in which a plurality of cylindrical lens cells having refractive power in the vertical direction are arranged. 43d is a fourth cylinder array having a plurality of cylindrical lens arrays corresponding to individual lens cells of the third cylinder array 43c.

  Reference numeral 50 denotes a color filter for returning the color in a specific wavelength region to the lamp 1 in order to adjust the color coordinates to a predetermined value. Reference numeral 48 denotes a condenser lens. Reference numeral 49 denotes a rear compressor composed of a cylindrical lens having a refractive power in the vertical direction. The illumination optical system is configured as described above.

  58 is a dichroic mirror that reflects light in the wavelength region of blue (B: for example 430 to 495 nm) and red (R: for example 590 to 650 nm) and transmits light in the wavelength region of green (G: for example 505 to 580 nm). is there. 59 is an incident side polarizing plate for G in which a polarizing element is bonded to a transparent substrate, and transmits only P-polarized light. Reference numeral 60 denotes a first polarization beam splitter that transmits P-polarized light and reflects S-polarized light on a polarization separation surface constituted by a multilayer film.

  61R, 61G, and 61B are a reflective liquid crystal panel for red, a reflective liquid crystal panel for green, and a reflective liquid crystal panel for blue as light modulation elements (or image forming elements) that reflect incident light and modulate the image, respectively. is there. 62R, 62G, and 62B are a quarter wavelength plate for red, a quarter wavelength plate for green, and a quarter wavelength plate for blue, respectively.

  A trimming filter 64a returns orange light to the lamp 1 in order to increase the color purity of the R light. Reference numeral 64b denotes an incident-side polarizing plate for RB in which a polarizing element is attached to a transparent substrate and transmits only P-polarized light.

  65 is a color selective phase difference plate that converts the polarization direction of the R light by 90 degrees and does not convert the polarization direction of the B light. Reference numeral 66 denotes a second polarization beam splitter that transmits P-polarized light and reflects S-polarized light on the polarization separation surface.

  Reference numeral 68B denotes a B-use exit side polarizing plate (polarizing element) that rectifies only the S-polarized component of the B light. 68G is a G output-side polarizing plate that transmits only the S-polarized light component of the G light. Reference numeral 69 denotes a dichroic prism that transmits R light and B light and reflects G light.

  With the above reference numerals 58 to 60 and 62 to 69, the illumination light from the illumination optical system is guided to the three RGB light modulation elements 61R, G, and B, and the image light from the three light modulation elements is synthesized. Thus, a color separation / synthesis optical system leading to the projection lens unit (projection optical system) 5 is configured.

  That is, the projector P includes a liquid crystal panel (light modulation element), an illumination optical system that guides the light flux from the lamp 1 (light source) to the liquid crystal panel, and a color separation / synthesis system that separates the light flux from the illumination optical system into a plurality of color lights. Is provided.

  In this embodiment, the polarization conversion element 45 converts P-polarized light to S-polarized light. The P-polarized light and S-polarized light described here are described with reference to the polarization direction of light in the polarization conversion element 45. On the other hand, the light incident on the dichroic mirror 58 is assumed to be P-polarized light considering the polarization directions in the first and second polarization beam splitters 60 and 66 as a reference. That is, in this embodiment, the light emitted from the polarization conversion element 45 is S-polarized light, but when the same S-polarized light is incident on the dichroic mirror 58, it is defined as P-polarized light.

  Next, the optical action will be described.

  Light emitted from the arc tube 41 is collected in a predetermined direction by the reflector 42. The reflector 42 has a parabolic concave mirror, and light from the focal position of the paraboloid becomes a light beam parallel to the symmetry axis of the paraboloid. However, since the light source from the arc tube 41 is not an ideal point light source and has a finite size, the condensed light flux includes many light components that are not parallel to the symmetry axis of the paraboloid. ing. These light beams are incident on the first cylinder array 43a. The light beam incident on the first cylinder array 43a is divided into a plurality of light beams corresponding to the number of cylinder lens cells and collected to form a plurality of strip-shaped light beams arranged in the vertical direction. The plurality of split light beams pass through the ultraviolet absorption filter 44 and the second cylinder array 43b to form a plurality of light source images in the vicinity of the polarization conversion element 45.

  The polarization conversion element 45 has a polarization separation surface, a reflection surface, and a half-wave plate. A plurality of light beams are incident on a polarization separation surface corresponding to each column, and are divided into a P-polarized component that transmits the light and an S-polarized component that is reflected there. The reflected S-polarized component is reflected by the reflecting surface and is emitted in the same direction as the P-polarized component. On the other hand, the P-polarized component transmitted through the polarization splitting surface is transmitted through the half-wave plate and converted into the same polarized component as the S-polarized component. Thus, a plurality of light beams having the same polarization direction are emitted.

  The plurality of light beams that have undergone polarization conversion are emitted from the polarization conversion element 45, compressed by the front compressor 46, reflected by the reflection mirror 47, and incident on the third cylinder array 43 c.

  The light beam incident on the third cylinder array 43c is divided into a plurality of light beams corresponding to the number of cylinder lens cells and collected to form a plurality of strip-shaped light beams arranged in the horizontal direction. The plurality of split light beams enter the rear compressor 49 via the fourth cylinder array 43d and the condenser lens 48.

  By the optical action of the front compressor 46, the condenser lens 48, and the rear compressor 49, rectangular images formed by a plurality of light beams overlap each other to form a rectangular uniform brightness illumination area. Reflective liquid crystal panels 61R, 61G, and 61B are disposed in this illumination area.

  The light converted to S-polarized light by the polarization conversion element 45 enters the dichroic mirror 58. Hereinafter, the optical path of the G light transmitted through the dichroic mirror 58 will be described.

  The G light transmitted through the dichroic mirror 58 enters the incident side polarizing plate 59. Even after being decomposed by the dichroic mirror 58, the G light remains P-polarized light (S-polarized light when the polarization conversion element 45 is used as a reference). The G light exits from the incident-side polarizing plate 59, then enters the first polarizing beam splitter 60 as P-polarized light, passes through the polarization separation surface, and reaches the G reflective liquid crystal panel 61G.

  Here, an image supply apparatus 800 such as a personal computer, a DVD player, a TV tuner, a smartphone, or a tablet terminal is connected to the IF (interface) board 25 of the projector P. The control board 11 drives the reflective liquid crystal panels 61R, 61G, 61B based on the image information input from the image supply device 800, and forms an original image for each color on them. Thereby, the light incident on each reflective liquid crystal panel is reflected and modulated (image modulation) according to the original image. The image supply device 800 and the projector P constitute an image display system.

  In the G reflective liquid crystal panel 61G, the G light is image-modulated and reflected. The P-polarized component of the image-modulated G light is again transmitted through the polarization separation surface of the first polarization beam splitter 60, returned to the light source side, and removed from the projection light. On the other hand, the S-polarized component of the image-modulated G light is reflected by the polarization separation surface of the first polarization beam splitter 60 and travels toward the dichroic prism 69 as projection light.

  At this time, in a state where all the polarization components are converted to P-polarized light (in a state where black is displayed), a quarter-wave plate 62G provided between the first polarizing beam splitter 60 and the G-use reflective liquid crystal panel 61G. The slow axis is adjusted in a predetermined direction. Thereby, the influence of the disturbance of the polarization state which generate | occur | produces with the 1st polarizing beam splitter 60 and the reflective liquid crystal panel 61G for G can be restrained small.

  The G light emitted from the first polarizing beam splitter 60 enters the dichroic prism 69 as S-polarized light, is reflected by the dichroic film surface of the dichroic prism 69, and reaches the projection lens unit 5.

  On the other hand, the R light and B light reflected by the dichroic mirror 58 enter the trimming filter 64a. R light and B light are still P-polarized light after being decomposed by the dichroic mirror 58. Then, after the orange light component is cut by the trimming filter 64 a, the R light and the B light are transmitted through the incident-side polarizing plate 64 b and are incident on the color selective phase difference plate 65.

  The color-selective phase difference plate 65 has an action of rotating only the polarization direction of the R light by 90 degrees, so that the R light is incident on the second polarization beam splitter 66 as S-polarized light and the B light is incident on P-polarized light.

  The R light incident on the second polarization beam splitter 66 as S-polarized light is reflected by the polarization separation surface of the second polarization beam splitter 66 and reaches the R-use reflective liquid crystal panel 61R. The B light incident on the second polarization beam splitter 66 as P-polarized light is transmitted through the polarization separation surface of the second polarization beam splitter 66 and reaches the B-use reflective liquid crystal panel 61B.

  The R light incident on the R reflective liquid crystal panel 61R is image-modulated and reflected. The S-polarized component of the image-modulated R light is reflected again by the polarization separation surface of the second polarization beam splitter 66, returned to the light source side, and removed from the projection light. On the other hand, the P-polarized component of the image-modulated R light passes through the polarization separation surface of the second polarization beam splitter 66 and travels toward the dichroic prism 69 as projection light.

  The B light incident on the B-use reflective liquid crystal panel 61B is image-modulated and reflected. The P-polarized component of the image-modulated B light is transmitted again through the polarization separation surface of the second polarization beam splitter 66 and returned to the light source side, and is removed from the projection light. On the other hand, the S-polarized component of the image-modulated B light is reflected by the polarization separation surface of the second polarization beam splitter 66 and travels toward the dichroic prism 69 as projection light.

  At this time, by adjusting the slow axes of the quarter-wave plates 62R and 62B provided between the second polarizing beam splitter 66 and the R and B reflective liquid crystal panels 61R and 61B, As in the case, the adjustment in the black display state of each of the R and B lights can be performed.

  The R light and B light that are combined into one light beam and emitted from the second polarization beam splitter 66 are analyzed by the exit-side polarizing plate 68B and enter the dichroic prism 69. Further, the R light is transmitted through the exit-side polarizing plate 68 </ b> B as P-polarized light and enters the dichroic prism 69.

  By being analyzed by the exit-side polarizing plate 68B, the B light is ineffective generated by the B light passing through the second polarizing beam splitter 66, the B reflective liquid crystal panel 61B, and the quarter wavelength plate 62B. The light is cut from the components.

  The R light and B light incident on the dichroic prism 69 pass through the dichroic film surface and are combined with the G light reflected by the dichroic film surface to reach the projection lens unit 5.

  Then, the combined R, G, B light is enlarged and projected onto a projection surface such as a screen by the projection lens unit 5.

  The optical path described above is when the reflective liquid crystal panel is in the white display state. Hereinafter, the optical path when the reflective liquid crystal panel is in the black display state will be described.

  First, the optical path of G light will be described. The P-polarized light of the G light that has passed through the dichroic mirror 58 enters the incident-side polarizing plate 59, then enters the first polarizing beam splitter 60, is transmitted through the polarization separation surface, and is transmitted to the G reflective liquid crystal panel 61G. And so on. However, since the reflective liquid crystal panel 61G is in the black display state, the G light is reflected without being image-modulated. For this reason, even after being reflected by the reflective liquid crystal panel 61G for G, the G light remains P-polarized light. Therefore, the G light again passes through the polarization separation surface of the first polarization beam splitter 60, passes through the incident-side polarizing plate 59, returns to the light source side, and is removed from the projection light.

  Next, the optical paths of R light and B light will be described. The P-polarized light of R light and B light reflected by the dichroic mirror 58 is incident on the incident side polarizing plate 64b. Then, after exiting from the incident side polarizing plate 64 b, the light enters the color selective phase difference plate 65. Since the color-selective phase difference plate 65 has an action of rotating only the polarization direction of the R light by 90 degrees, the R light is incident on the second polarization beam splitter 66 as S-polarized light and the B light is incident on P-polarized light.

  The R light incident on the second polarization beam splitter 66 as S-polarized light is reflected by the polarization separation surface and reaches the R-use reflective liquid crystal panel 61R. The B light incident on the second polarization beam splitter 66 as P-polarized light passes through the polarization separation surface and reaches the B-use reflective liquid crystal panel 61B.

  Here, since the R reflective liquid crystal panel 61R is in a black display state, the R light incident on the R reflective liquid crystal panel 61R is reflected without being image-modulated. For this reason, even after being reflected by the reflective liquid crystal panel 61R for R, the R light remains S-polarized light. Accordingly, the R light is reflected again by the polarization separation surface of the second polarization beam splitter 66, passes through the incident-side polarizing plate 64b, returns to the light source side, and is removed from the projection light. Thereby, black display is performed.

  On the other hand, the B light incident on the B reflective liquid crystal panel 61B is reflected without being image-modulated because the B reflective liquid crystal panel 61B is in the black display state. For this reason, even after being reflected by the reflective liquid crystal panel 61B for B, the B light remains P-polarized light. Therefore, the B light again passes through the polarization separation surface of the second polarizing beam splitter 66, is converted to P-polarized light by the color-selective retardation plate 65, passes through the incident-side polarizing plate 64b, and is returned to the light source side. Removed from the projected light.

[First embodiment]
FIG. 3 is a view of the external appearance of the projector (projection display device) P in the embodiment of the present invention as seen from the top side. Here, the top surface side is a surface on the side where a later-described lamp cover is provided.

  Reference numeral 71 denotes an exterior lower case for protecting the lower side of the projector P main body. A lamp cover 72 is opened and closed when the lamp unit 4 is replaced. Reference numeral 73 denotes a lens cover for protecting the projection lens unit 5. Reference numeral 74 denotes an air intake cover for protecting the air filter 18. Reference numeral 75 denotes an exhaust cover attached to the exhaust port 17b. Reference numeral 76 denotes an indicator provided in the outer case 17 for indicating the state of the projector P. Reference numerals 17c (17cL, 17cR) denote adjustment leg screw holes provided in the exterior upper case 17 for attaching an adjustment leg (not shown) when projecting after being inverted.

  FIG. 4 is a view of the appearance of the projector P in the embodiment of the present invention as seen from the bottom side.

  Reference numeral 77 denotes an installation foot for installation. 71a (71aL, 71aR) are adjustment screw holes for fixing the ceiling mount bracket provided in the exterior lower case 71 for mounting the ceiling mount bracket for projecting the projector P in a state of being suspended from the ceiling.

  FIG. 5 is an exploded perspective view of the folding mirror unit 80 in the first embodiment of the present invention.

  Reference numeral 80 denotes a folding mirror unit provided on the front side of the projection lens unit 5 in order to realize projection of a vertically long image. Reference numeral 81 denotes a folding mirror (reflecting member) for folding an image enlarged and projected from the projection lens. Reference numeral 82 denotes a mirror holder for holding the folding mirror. Reference numerals 82a denote shafts provided on both sides of the mirror holder. A screw hole 82b is attached to the front chassis 92 described later. Reference numeral 82 c denotes a screw hole provided for holding the folding mirror 81. Reference numeral 83 denotes rubber provided at the four corners of the folding mirror 82. Reference numeral 84 denotes a leaf spring for biasing the rubber 83 provided at the four corners. 84a is provided with an insertion hole for inserting a screw 85 to be described later. Reference numeral 85 denotes a screw for holding the leaf spring 84 in a state of being urged against the rubber 83.

  FIG. 6 is an exploded perspective view of the portrait unit (optical device) U in the first embodiment of the present invention.

  91 is a rear chassis. Reference numeral 91a denotes an insertion hole for inserting the shaft 82a of the mirror holder 82. Reference numeral 91b denotes a screw hole provided for attaching an upper chassis 94 described later. 91c is a screw hole provided for attaching a lower chassis 96 described later.

  Reference numeral 92 denotes a front chassis. Reference numeral 92 a denotes an insertion hole for inserting the shaft 82 b of the mirror holder 82. Reference numeral 92b denotes an elongated hole provided for adjusting the folding mirror unit 80 to a desired angle. Reference numeral 92c denotes a screw hole provided for attaching an upper chassis 94 described later. A screw hole 92d is provided for mounting a lower chassis 96 described later.

  Reference numeral 93 denotes a screw with a knob for operating the folding mirror 80 to a desired angle, and engages with the screw hole 82b through the long hole 92b.

  Reference numeral 94 denotes an upper chassis. Reference numeral 94a denotes a shaft for insertion into an insertion hole 98a provided in the upper base plate 98 described later. 94b is an insertion hole for attaching to the screw hole 91b and the screw hole 92c. Reference numeral 94 denotes a screw hole attached to an upper base plate 98 described later.

  Reference numeral 95 denotes a screw for fastening the upper chassis 94 to the rear chassis 91 and the front chassis 92.

  Reference numeral 96 denotes a lower chassis. Reference numeral 96a denotes a shaft for insertion into an insertion hole 99a provided in the lower base plate 99 described later. Reference numeral 96b denotes an insertion hole for attaching to the screw hole 91c and the screw hole 92d.

  That is, the integrated member (third support member) 200 includes a rear chassis 91, a front chassis 92, an upper chassis 94, and a lower chassis 96, and each chassis is joined by screws to form a frame.

  Reference numeral 97 denotes a screw for fastening the lower chassis 96 to the rear chassis 91 and the front chassis 92.

  Reference numeral 98 denotes an upper base plate (first support member) attached to the upper chassis 94 and the projector P main body. An insertion hole 98a is provided for inserting the shaft 95a. Reference numeral 98b denotes a long hole provided for adjusting an integrated portion of the folding mirror unit 80, the rear chassis 91, the front chassis 92, the upper chassis 94, and the lower chassis 96 to a desired angle. Reference numerals 98c (98cL, 98cR) denote attachment holes for attachment to the projector P main body.

  Reference numeral 99 denotes a lower base plate (second support member) attached to the lower chassis 95 and the projector P main body. Reference numeral 99a denotes an insertion hole provided for inserting the shaft 96a. 99c (99cL, 99cR) are mounting holes for mounting to the projector P main body.

  Reference numeral 100 denotes a screw with a knob for adjusting an integrated portion of the folding mirror unit 80, the rear chassis 91, the front chassis 92, the upper chassis 94, and the lower chassis 96 to a desired angle.

  FIG. 7 is an assembly diagram of the portrait unit U in the first embodiment of the present invention. In FIG. 7, the direction parallel to the long side direction of the folding mirror 81 is the y-axis direction, the direction orthogonal to the y-axis direction is parallel to the surfaces of the upper base plate 98 and the lower base plate 99, and the x-axis direction. The axial direction perpendicular to the y-axis direction was taken as the z-axis direction.

  The folding mirror unit 80 is rotatable about the shaft 82a. Therefore, the angle of the folding mirror 81 in the xz plane can be adjusted within the range of the long hole 92b provided in the front plate 92.

  On the other hand, the integrated part of the folding mirror unit 80, the rear chassis 91, the front chassis 92, the upper chassis 94, and the lower chassis 96 is rotatable about a shaft 94a. Therefore, the angle of the integrated part of the folding mirror unit 80, the rear chassis 91, the front chassis 92, the upper chassis 94, and the lower chassis 96 can be adjusted in the xy plane within the range of the long hole 99b provided in the lower base plate 99. . In other words, the angle of the folding mirror 81 can be adjusted in the xy plane.

  That is, according to the configuration shown in the present embodiment, since the folding mirror 81 can be rotated in two directions, fine adjustment is possible, and a highly accurate projection image can be projected.

  In other words, the portrait unit U includes the integrated member 200 that supports the folding mirror 81 so that the folding mirror 81 can rotate. The folding mirror 81 is supported by the upper base plate 98 and the lower base plate 99 via the integrated member 200. Further, the upper base plate 98 and the lower base plate 99 support the integrated member 200 so that the integrated member 200 can rotate.

  In other words, the folding mirror 81 is a mirror having a long side direction (direction 81L shown in FIG. 5) and a short side direction (direction 81S shown in FIG. 5), and the integrated member 200 is a frame. Further, the folding mirror 81 can be rotated about an axis parallel to the long side direction of the folding mirror 81, and the frame body can be rotated about an axis parallel to the short side direction of the folding mirror 81. .

  The long side direction of the folding mirror 81 is a direction 81L parallel to the longer side of the dimensions excluding the thickness of the folding mirror 81, as shown in FIG. Similarly, the direction 81S is parallel to the shorter side of the direction excluding the thickness of the folding mirror 81.

  FIG. 8 is a diagram in which the portrait unit U in the first embodiment of the present invention is attached to the projector P main body.

  101 (101L, 101R) is a screw for fixing the upper base plate 98 to the projector P, and is a screw fixed in an adjustment leg screw hole 17c provided in the outer case 17. On the other hand, as shown in FIG. 6, the lower base plate 99 is fixed to the projector P by screws 102 (102L, 102R), and the screws 102 are fixed by adjusting screw holes 71a for the ceiling hanger.

  That is, the projector P includes an adjustment screw hole 71aL (first recess) corresponding to the mounting hole 99cL (first opening) provided in the lower base plate 99. Furthermore, an adjustment screw hole 71aR (second opening) corresponding to a mounting hole 99cR (second opening) provided in the lower base plate 99 is provided. The attachment hole 99cL and the attachment hole 99cR are used when the lower base plate 99 is fixed to the projector P, and also when the projector P is suspended from the ceiling.

  Here, the adjustment screw hole 71aL corresponding to the attachment hole 99cL provided in the lower base plate 99 matches the position of the center of gravity of the attachment hole 99cL and the adjustment screw hole 71a when the lower base plate 99 is fixed to the projector P. It shows that. The same applies to the adjustment screw hole 71aR corresponding to the mounting hole 99cR provided in the lower base plate 99.

  In other words, the projector P includes an adjustment screw hole 71aL (first recess) corresponding to the attachment hole 99cL (first opening) provided in the lower base plate 99. Furthermore, an adjustment screw hole 71aR (second opening) corresponding to a mounting hole 99cR (second opening) provided in the lower base plate 99 is provided.

  Further, the projector P includes a screw 102L (first convex portion) that can be engaged with the adjustment screw hole 71aL and a screw 102R (second convex portion) that can be engaged with the adjustment screw hole 71aR. The screws 102L and 102R engage with the adjustment screw holes 71aL and the adjustment screw holes 71aR when the lower base plate 99 is fixed to the projector P. Furthermore, the screws 102L and 102R engage with the adjustment screw holes 71aL and 71aR when the projector P is suspended from the ceiling, and support the weight of the projector P.

  That is, in the configuration shown in the present embodiment, the adjustment screw hole 71a has a plurality of functions, that is, a function of fixing the lower base plate 99 to the projector P and a function of fixing the ceiling hanging bracket to the projector P. In other words, the adjustment screw hole 71 can be used both when the lower base plate 99 is fixed and when the ceiling hanging bracket is fixed. That is, when fixing the portrait unit U to the projector P, it is not necessary to provide a new adjustment screw hole, and it is possible to use an existing adjustment screw hole for a ceiling hanging bracket.

  As described above, in this embodiment, the portrait unit U that can be mounted on the projector P includes the folding mirror 81 that reflects the light flux from the projector P. Further, the upper base plate 98 that supports one end of the folding mirror 81 and can be fixed to one end of the projector P, and the lower base that supports the other end of the folding mirror 81 and can be fixed to the other end of the projector P. A base plate 99.

  Here, the one end side of the folding mirror 81 refers to the side of the folding mirror 81 that faces the upper base unit 98 (side S1 shown in FIG. 5). Similarly, the other end side of the folding mirror 81 indicates the side of the folding mirror 81 that faces the lower base unit 99 (the side opposite to the side S1).

  Furthermore, the one end side of the projector P indicates the side of the surface of the projector P on which the upper base unit 98 is fixed (surface S3 shown in FIG. 8). Similarly, the other end side of the projector P indicates the side of the surface of the projector P on which the lower base unit 99 is fixed (the surface opposite to the surface S3).

  The projector P separates the portrait unit U, the liquid crystal panel, the illumination optical system that guides the light flux from the lamp 1 to the liquid crystal panel, and the light flux from the illumination optical system into a plurality of color lights. And a color separation / synthesis system that leads to

  As described above, the portrait unit U and the projector P main body are mechanically coupled at the top surface and the bottom surface, so that the rigidity is increased. Therefore, the occurrence of backlash is suppressed, and it is possible to project with high accuracy.

[Second Embodiment]
The portrait unit U shown in the second embodiment of the present invention will be described below with reference to FIG.

  FIG. 9 is a diagram showing a portrait unit U in the present embodiment.

  Reference numeral 111 denotes a reinforcing sheet metal (fourth support member) fixed together with an upper base plate 112 and a lower base plate 113 which will be described later. In other words, the reinforcing sheet metal 111 supports the upper base plate (first support member) 112 and the lower base plate (second support member) 113.

  111a and 111b are insertion holes for attaching the reinforcing metal plate 111 to an upper base plate 112 and a lower base plate 113 which will be described later.

  Reference numeral 112 denotes an upper base plate attached to the upper chassis 94 and the projector P main body. Reference numerals 112c (112cL, 112cR) denote attachment holes for attachment to the projector P main body. 112b is a screw hole for attaching the reinforcing sheet metal 111.

  Reference numeral 113 denotes a lower base plate attached to the lower chassis 95 and the projector P main body. Reference numerals 113c (113cL, 113cR) denote attachment holes for attachment to the projector P main body. The lower base plate 113 is also provided with a screw hole (not shown) for attaching the reinforcing sheet metal 111.

  That is, the reinforcing metal plate 111 is fixed to the upper base plate 112 and the lower base plate 113. For this reason, compared with the above-mentioned 1st Example, since rigidity becomes high with respect to the height direction of the projector P, generation | occurrence | production of play is suppressed more and it becomes possible to project a projection image with higher precision. .

[Other Embodiments]
In the above-described embodiment, the configuration of the projector P using the lamp 1 as the light source is exemplified, but the present invention is not limited to this. In the case of an optical device capable of projecting a projection image with high accuracy and a projection display device using the same, for example, the light source includes a laser diode that emits blue light and a wavelength of blue light from the laser diode. The structure provided with the fluorescent substance to convert may be sufficient.

  In the above-described embodiments, the configuration using the cylinder lens array having a plurality of cylindrical lens cells as the illumination optical system is exemplified, but the present invention is not limited to this. For example, the illumination optical system may have a configuration using a plurality of fly-eye lens arrays.

81 Folding mirror (reflective member)
98 Upper base plate (first support member)
99 Lower base plate (second support member)

Claims (8)

An optical device that can be mounted on a projection display device,
A reflecting member that reflects a light flux from the projection display device;
A first support member that supports one end side of the reflecting member and can be fixed to one end side of the projection display device;
A second support member that supports the other end side of the reflection member and can be fixed to the other end side of the projection display device.
An optical device. A third support member for supporting the reflection member so that the reflection member is rotatable;
The reflection member is supported by the first support member and the second support member via the third support member.
The optical apparatus according to claim 1. The first support member and the second support member support the third support member so that the third support member can rotate.
The optical apparatus according to claim 2. The reflecting member is a mirror having a long side direction and a short side direction,
The third support member is a frame,
The mirror is rotatable about an axis parallel to the long side direction;
The frame is rotatable around an axis parallel to the short side direction of the mirror.
The optical device according to claim 2, wherein the optical device is an optical device. A fourth support member supporting the first support member and the second support member;
The optical device according to claim 1, wherein the optical device is an optical device. An optical device according to any one of claims 1 to 5,
A light modulation element;
An illumination optical system for guiding a light beam from a light source to the light modulation element;
A color separation / synthesis system that separates a light beam from the illumination optical system into a plurality of color lights, combines a light beam from the light modulation element, and guides the light to the optical device;
A projection type display device characterized by that. A first recess corresponding to a first opening provided in the second support member;
A second recess corresponding to the second opening provided in the second support member, and
The first recess and the second recess are used when the second support member is fixed to the projection display device, and also used when the projection display device is suspended from the ceiling.
The projection display device according to claim 6. A first recess corresponding to a first opening provided in the second support member;
A second recess corresponding to a second opening provided in the second support member;
A first convex portion engageable with the first concave portion;
A second convex part engageable with the second concave part,
The first convex portion and the second convex portion engage with the first concave portion and the second concave portion when fixing the second support member to the projection display device, and When the projection display device is suspended from the ceiling, the projection display device engages with the first recess and the second recess, and supports the weight of the projection display device.
The projection display device according to claim 6.

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