JP2003167296A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately adjust a swing angle without performing troublesome operation. <P>SOLUTION: Several distorted trapezoidal patterns required for the adjustment of the swing angle by which projection is performed to a screen 2 are projected to the screen 2 as images, and a user selects a trapezoidal pattern seen as nearly a square shape and inputs it from a controller 88a, so that a CPU 89 calculates a value required by the user to adjust the swing angle while seeing a scale 58f and projects with the trapezoidal pattern as the images to the screen 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device capable of adjusting a tilt angle.

[0002]

2. Description of the Related Art Some projector apparatuses use a transmissive liquid crystal panel as a light modulation element.

Since the projector device projects an image using a projection lens, the image projected on a screen or the like can be enlarged to an arbitrary size by moving the projector device in the optical axis direction. Therefore, the projector device is suitable for a large screen, and is configured so that many viewers can enjoy the image at the same time by projecting the image on the screen. Therefore, such a projector device is used in a place requiring a large screen, such as a movie theater or an event venue.

In the projector apparatus as described above, so-called trapezoidal distortion occurs when the optical axis of the projection lens is obliquely projected with respect to the normal line of the screen. Further, in the projector device, when the projection surface of the screen or the like is tilted, even if the central portion of the image to be projected is focused, for example, a focus shift occurs in the vertical direction of the screen. Without any correction, the focus was used within a range where the image quality was not noticeable.

In such a projector device, in the projection optical system, in order to focus on an image plane tilted with respect to the optical axis, an object plane at a position conjugate with the image plane is a plane perpendicular to the optical axis. Is tilted by a predetermined angle. Hereinafter, the predetermined angle will be referred to as a tilt angle. In general, when the medium on both sides of the projection optical system is air having a refractive index of 1, the tilt angle ρ is defined by the inclination angle of the screen with respect to the optical axis, that is, the driving angle β, and the projection magnification m.
Is given by Equation 1 below. tan ρ = −tan β / m (Equation 1) Therefore, according to Equation 1, the projector device has a liquid crystal panel, which is the object plane, a screen with respect to the optical axis in order to eliminate the above-described vertical focus shift. It is conceivable to arrange them with a tilt angle corresponding to the inclination angle of, that is, the projection angle on the screen.

[0006]

However, the above-described projector device is not suitable for the case where an optical system is adopted in which images displayed on a plurality of liquid crystal panels are combined and projected by using combining means such as a dichroic prism. , When performing the operation to set the tilt angle, the position of each liquid crystal panel slightly shifts in the plane perpendicular to the optical axis of the projection lens,
As a result, there is a problem that the positions of the pixels of the combined image are displaced.

Further, in the above-described projector device, although the liquid crystal panels have substantially the same tilt angle, the tilt angle must be adjusted for each liquid crystal panel, and the adjustment work is complicated. In such a projector device, when the tilt angle of each liquid crystal panel is adjusted, a small change in the angle affects the focus of the image projected on the screen surface, as shown in Expression 1. That is, since the adjustment of the tilt angle is in a small angle range, it is difficult to grasp what kind of angle state the tilt angle is currently in, and as a result, misadjustment occurs or the focus state is adjusted optimally. Could take time.

Further, in the projector device, when obtaining the tilt angle of each liquid crystal panel according to the equation 1, information on the driving angle β which is a relative angular relationship between the screen and the optical axis of the projection lens is required, and particularly the screen itself. It was difficult to accurately determine the driving angle and obtain the tilt angle at the installation location of the device when the device was installed with an inclination, without using a dedicated measuring instrument.

Therefore, according to the present invention, at the installation location of the device,
It is an object of the present invention to provide a projector device capable of easily and appropriately adjusting a tilt angle and projecting an image so as to obtain an appropriate focus over the entire image.

[0010]

In order to achieve the above-mentioned object, a projector apparatus according to the present invention separates a light source for emitting light and emitted light emitted from the light source for each wavelength band of different colors. Separation means, a plurality of light modulation means for modulating the light of the wavelength bands of the respective colors separated by the separation means, and a plurality of light modulation means fixed at a predetermined position and modulated by the plurality of light modulation means By inclining the projection means, the angle formed by the synthesizing means for synthesizing the light in the wavelength band of each color, the projection means for projecting the synthesized light synthesized by the synthesizing means, and the optical axis of the projection means with respect to the plurality of light modulating means And an adjusting means for changing.

In the projector device according to the present invention configured as described above, the plurality of light modulating means and the synthesizing means are fixed to each other at predetermined positions, and the light modulating means and the synthesizing means are adjusted according to the angle at which the image is projected on the screen. By tilting the projection means by the means, the focus is brought into an appropriate state over the entire image.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a projector apparatus to which the present invention is applied will be described in detail with reference to the drawings.

First, the optical system of the projector device will be described. As shown in FIG. 1, the projector device 1 is
It is a three-panel type that uses three transmissive liquid crystal panels to display a color image, and projects an image onto an external screen 2 or the like. The projector device 1 includes a light source 11 and a UV / IR (ultraviolet) that cuts light in the ultraviolet and infrared wavelength bands in the order of the optical paths of the emitted light emitted from the light source 11.
/ Infrared) cut filter 12, fly-eye lenses 13 and 14 for making the illuminance distribution uniform, a main condenser 15 for condensing light, and a first dichroic mirror 16 for separating light according to a wavelength band. ing.

The light source 11 is capable of emitting white light, which is necessary for projecting a color image, and which includes red, green and blue lights which are the three primary colors of light. Such a light source 11 is a light emitter 11 that emits white light.
It has a and a reflector 11b that reflects the light emitted from the light emitting body 11a. As the light emitting body 11a of the light source 11, for example, a halogen lamp, a metal halide lamp, or a xenon lamp is used. The reflector 11b of the light source 11 is a concave mirror, and the mirror surface has a shape with good circumferential efficiency. The reflector 11b is, for example,
The shape is a rotationally symmetrical surface such as a rotating paraboloid or a rotating ellipsoid.

The UV / IR cut filter 12 is a light source 1.
The light in the ultraviolet region and the infrared region included in the white light emitted from No. 1 is removed.

The fly-eye lenses 13 and 14 are used for the light source 11
In order for the illumination light emitted from the device to uniformly illuminate the inside of the effective area of the liquid crystal panel, which will be described later, the illumination light is made into a luminous flux in the shape of the effective area of the liquid crystal panel, and the illuminance distribution is made uniform. Such fly-eye lenses 13 and 14 are also called a multi-lens array. Two fly-eye lenses having a plurality of small convex lenses arranged in an array are combined, and the illumination light from the light source 11 is collected by the multi-lens array on the light source 11 side. Light is emitted to create a small point light source, and the illumination light from each point light source is combined by the other multi-lens array.

The main condenser 15 is a convex lens and collects the illumination light transmitted through the fly-eye lenses 13 and 14.

The first dichroic mirror 16 separates the light incident through the main condenser 15 into red light LR to be transmitted and other colored light to be reflected, that is, green light LG and blue light LB.

Further, the projector device 1 includes the red light L separated by the first dichroic mirror 16.
A first total reflection mirror 17 that totally reflects light in the order of the R optical path.
And a first condenser lens 18 for condensing light together with the main condenser 15, and a first liquid crystal panel section 19 for spatially modulating light.

The first total reflection mirror 17 converts the red light LR separated by the first dichroic mirror 16,
The light is reflected toward the first condenser lens 18.

The first condenser lens 18 condenses the red light LR reflected by the first total reflection mirror 17 on the first liquid crystal panel section 19.

The first liquid crystal panel section 19 spatially modulates the red light LR entering through the first condenser lens 18 according to an image signal corresponding to red image information.

Further, the projector apparatus 1 has another color light separated by the first dichroic mirror 16,
That is, the second dichroic mirror 20 that separates light according to the wavelength band is provided along the optical paths of the green light LG and the blue light LB.

The second dichroic mirror 20 separates the incident light into green light LG and other color light, that is, blue light LB.

Furthermore, the projector device 1 includes the second device.
The second condenser lens 21 that condenses the light together with the main condenser 15 and the second liquid crystal panel portion 22 that spatially modulates the light in the order of the optical path of the green light LG separated by the dichroic mirror 20. ing.

The second condenser lens 21 condenses the green light LG separated by the second dichroic mirror 20 on the second liquid crystal panel section 22.

The second liquid crystal panel section 22 spatially modulates the green light LG incident through the second condenser lens 21 according to an image signal corresponding to green image information.

Furthermore, the projector device 1 includes the second device.
In the order of the optical path of the blue light LB separated by the dichroic mirror 20, the first relay lens 23 for correcting the optical path length, the second total reflection mirror 24 for totally reflecting the light, and the optical path together with the first relay lens 23. A second relay lens 25 that corrects the length, a third total reflection mirror 26 that totally reflects the light, and a third condenser that collects the light together with the main condenser 15.
And a third liquid crystal panel section 28 that spatially modulates light.

The first relay lens 23 receives the blue light LB separated by the second dichroic mirror 20,
The light is guided to the second total reflection mirror 24.

The second total reflection mirror 24 reflects the blue light LB that has entered through the first relay lens 23 toward the second relay lens 25.

The second relay lens 25 guides the blue light LB reflected by the second total reflection mirror 24 to the third total reflection mirror 26.

The third total reflection mirror 26 reflects the blue light LB that has entered through the second relay lens 25 toward the third condenser lens 27.

The third condenser lens 27 condenses the blue light LB reflected by the third total reflection mirror 26 on the third liquid crystal panel section 28.

The third liquid crystal panel section 28 has a function of spatially modulating the blue light LB incident through the third condenser lens 27 in accordance with an image signal corresponding to blue image information. ing.

In the first relay lens 23 and the second relay lens 25, the optical path of the blue light LB to the third liquid crystal panel section 28 is the first liquid crystal panel section 1 of the red light LR.
9 and the second liquid crystal panel portion 22 of the green light LG.
Since it is longer than the optical path, this is corrected and the blue light LB is appropriately guided so that the third liquid crystal panel unit 28 is focused.

Furthermore, the projector device 1 includes the first
Liquid crystal panel section 19, second liquid crystal panel section 22 and third
The red light LR, the green light LG, and the blue light LB are located at the positions where the optical paths of the red light LR, the green light LG, and the blue light LB that are spatially modulated by the liquid crystal panel unit 28 intersect.
And a projection lens 30 for projecting the combined light combined by the cross dichroic prism 29 toward the screen 2.

The cross dichroic prism 29 has three entrance surfaces 29R, 29G and 29B and one exit surface 29T. Further, the cross dichroic prism 29 is
The red light LR emitted from the first liquid crystal panel section 19 is incident on the incident surface 29R, and the green light LG emitted from the second liquid crystal panel section 22 is incident on the incident surface 29G. And the incident surface 29
B is the blue light L emitted from the third liquid crystal panel unit 28.
B is incident. Then, the cross dichroic prism 29 combines the red light LR, the green light LG, and the blue light LB that have entered the incident surfaces 29R, 29G, and 29B, respectively, and outputs the combined light from the emitting surface 29T.

The projection lens 30 magnifies and projects the combined light emitted from the emission surface 29T of the cross dichroic prism 29 onto the screen 2.

Here, the first in the projector device 1
Liquid crystal panel section 19, second liquid crystal panel section 22 and third
The liquid crystal panel section 28 has substantially the same configuration.
As shown in FIGS. 2 and 3, with respect to the liquid crystal panel 41,
An incident side polarization plate 42 is arranged on the light incidence side, and an emission side polarization plate 43 is arranged on the light emission side.

The liquid crystal panel 41 is a TN (Twisted Nemati).
c) It is a transmissive type using liquid crystal, and nematic liquid crystal is enclosed between two transparent electrodes (not shown) so that the molecular structure is twisted.

The incident-side polarization plate 42 and the emission-side polarization plate 43 are arranged so that their light transmission axes are orthogonal to each other, that is, in a so-called crossed Nicols relationship. Incident side polarization plate 42
The transmission axis of is set so as to be in the same direction as the orientation of the liquid crystal molecules on the substrate surface on the incident side of the liquid crystal panel 41. On the other hand, the transmission axis of the emission side polarizing plate 43 is the liquid crystal panel 4
It is set so as to be in the same direction as the alignment of liquid crystal molecules on the substrate surface on the exit side of 1.

In each of the liquid crystal panel sections having such a configuration, when the irradiation light L0 from the light source 11 is incident on the incident side polarizing plate 42, a linear polarization component having the same vibration direction as the transmission axis of the incident side polarizing plate 42. Only L1 passes through the incident side polarization plate 42. On the other hand, the linearly polarized light component L2 in the vibration direction orthogonal to the transmission axis of the incident side polarizing plate 42 is absorbed by the incident side polarizing plate 42 and is not transmitted. Next, the linearly polarized light component L1 that has passed through the incident side polarization plate 42 enters the liquid crystal panel 41.

Here, when the liquid crystal panel 41 is in a normal state in which a voltage is not applied between the two transparent electrodes, as shown in FIG. 9 along the twist of the liquid crystal molecule
It is rotated 0 °. As a result, the light emitted from the liquid crystal panel 41 has its vibration direction in the same direction as the transmission axis of the emission side polarization plate 43, and is transmitted through the emission side polarization plate 43. The light transmitted through the emission side polarization plate 43 is incident on the cross dichroic prism 29, and passes through the projection lens 30 to the screen 2
Projected on. At this time, the display state of the image projected on the screen 2 is a so-called white level display.

On the other hand, when a voltage is applied between the two transparent electrodes in the liquid crystal panel 41, as shown in FIG. 3, the optical rotatory power is changed according to the applied voltage and the light is transmitted through the emission side polarizing plate 43. The component is modulated.

The first liquid crystal panel section 19, the second liquid crystal panel section 22 and the third liquid crystal panel 28 having such a configuration are based on respective image signals corresponding to red, green and blue image information. Thus, the red light, the green light and the blue light are spatially modulated.

Here, in the optical system, as shown in FIG. 1, along the optical path of the emitted light emitted from the light source 11,
The operation of each part will be described.

The emitted light emitted from the light source 11 is UV /
The light enters the IR cut filter 12, the UV / IR cut filter 12 removes the light in the ultraviolet region and the infrared region and guides it to the fly eye lenses 13 and 14, and the fly eye lenses 13 and 14 make the illuminance distribution uniform. Is guided to the main capacitor 15, condensed by the main condenser 15, and guided to the first dichroic mirror 16.

Next, the emitted light that has passed through the main condenser 15 is guided by the first dichroic mirror 16 to the red light LR and the first total reflection mirror 17, and the other colored light, that is, green light LG and The blue light LB is reflected and guided to the second dichroic mirror 20.

The red light LR guided to the first total reflection mirror 17 is reflected by the first total reflection mirror 17 and then converted into the first total reflection mirror 17.
Is guided to the first condenser lens 18 and is condensed on the first liquid crystal panel section 19 by the first condenser lens 18. The red light LR condensed on the first liquid crystal panel unit 19 is spatially modulated based on an image signal corresponding to red image information and guided to the cross dichroic prism 29 to be guided from the incident surface 29R to the cross dichroic prism. It is incident inside 29.

On the other hand, the green light LG and the blue light LB guided to the second dichroic mirror 20 are reflected by the second dichroic mirror 20 and guided to the second condenser lens 21. , The blue light LB is transmitted and guided to the first relay lens 23.

Green light L guided to the second condenser lens 21.
The G is condensed on the second liquid crystal panel unit 22 by the second condenser lens 21. The green light LG condensed on the second liquid crystal panel unit 22 is spatially modulated based on the image signal corresponding to the green image information, and the cross dichroic prism 2
The light is guided to the light incident surface 9G and enters the cross dichroic prism 29 through the incident surface 29G.

On the other hand, the blue light LB guided to the first relay lens 23 is guided to the second total reflection mirror 24 by the first relay lens 23, reflected by the second total reflection mirror 24, and then reflected by the second total reflection mirror 24. The second relay lens 25 leads to the third total reflection mirror 26.
And is reflected by the third total reflection mirror 26,
It is guided to the third condenser lens 27. Third condenser lens 2
The blue light LB guided to 7 is condensed on the third liquid crystal panel 28 portion by the third condenser lens 27. The blue light LB condensed on the third liquid crystal panel unit 28 is spatially modulated on the basis of an image signal corresponding to blue image information, is guided to the cross dichroic prism 29, and is guided from the incident surface 29B to the cross dichroic prism 29. Incident on the inside.

Each incident surface 2 of the cross dichroic prism 29
The red light LR, the green light LG, and the blue light LB incident from 9R, 29G, and 29B are combined by the cross dichroic prism 29 and become combined light, which is emitted from the emission surface 29T toward the projection lens 30 and is projected by the projection lens 30 to the screen. 2 is enlarged and projected.

The projector device 1 having the above-described optical system has a mechanism for adjusting the tilt angle, and has a first liquid crystal panel unit 19, a second liquid crystal panel unit 22, and a third liquid crystal panel unit. 28 is a cross dichroic prism 29
On the other hand, at the time of manufacture, the positions of the corresponding pixels of each liquid crystal panel unit are adjusted so as to match each other, and the liquid crystal panel unit is fixed on the base of the optical unit described later.

Therefore, a structure for supporting the optical system of the projector apparatus 1 and adjusting the tilt angle will be described below.

As shown in FIGS. 4 to 7, the projector device 1 includes a base 51 forming a part of the housing of the projector device 1 and a support member 52 fixed on the base 51.
A support plate 53 provided on the support member 52, to which the cross dichroic prism 29 and the composite optical system such as each liquid crystal panel section are fixed, a screw 54 for fixing the support plate 53 on the support member 52, and a base 51. A horizontal adjustment member 55 that is rotatable above a fulcrum 55a, a screw 56 that fixes the horizontal adjustment member 55 on the base 51, and a first rotation support member that is fixed on the horizontal adjustment member 55. 57 and the horizontal adjustment member 5
5, a vertical adjustment member 58 rotatably provided around a fulcrum 58a, a second rotation support member 59 provided on the vertical adjustment member 58, and a vertical adjustment member 58 provided on a horizontal adjustment member 55. And a screw 60 for fixing the second rotation support member 59 to each other.
And a coil spring 61 inserted through the screw 60.

As shown in FIGS. 4 and 7, the base 51 is provided with a supporting plate 53 via a supporting member 52, and a horizontal adjusting member 55 is arranged so as to be rotatable about a fulcrum 55a. Has been done. Further, as shown in FIG. 7, the base 51 has a lever (not shown) for adjusting the displacement amount of the second rotation support member 59 inserted into a later-described lever opening 58g of the vertical adjustment member 58 and a scale. An opening 51a for reading 58f is provided, and two long holes 51b corresponding to a screw hole 55b of the horizontal adjusting member 55, which will be described later, are provided long in the rotational direction of the horizontal adjusting member 55.

As shown in FIG. 4, the support member 52 is erected on the base 51 and supports the support plate 53 on the base 51.

As shown in FIG. 4, the support plate 53 is an optical base to which the optical elements such as the cross dichroic prism 29 and each liquid crystal panel section described in the above optical system are fixed,
Each pixel of each liquid crystal panel section is fixed so as to correspond thereto so that there is no pixel shift. In FIG. 4, only the cross dichroic prism 29 and the second liquid crystal panel unit 22 are shown, and other optical elements are omitted.

The screw 54 is a screw for fixing the support plate 53 to the support member 52.

As shown in FIGS. 5 to 7, the horizontal adjusting member 55 has a fulcrum 55a which is the center of rotation and a screw hole 55 into which a screw 56 for fixing the horizontal adjusting member 55 is screwed.
b, a guide wall 55c that stands up on a substantially circumferential surface for accommodating the vertical adjustment member 58, and a plurality of inclined surfaces 55d corresponding to an inclined surface 58e of the vertical adjustment member 58, which will be described later, inside the guide wall 55c. And a through hole 55f is provided at the center of the guide wall 55c. Further, the horizontal adjustment member 55 is fixed so that the first rotation support member 51 is erected, and as shown in FIG.
A fulcrum 55a is provided between the rotation supporting members 51, and is arranged on the base 51 so as to be rotatable about the fulcrum 55a in the arrow R2 direction shown in FIGS. 6 and 7.

Here, it is preferable that the fulcrum 55a on the horizontal adjustment member 55 is at the entrance pupil position or the center of gravity position of the projection lens 30, and accordingly, the position of the first rotation support member 57 is also at the fulcrum 55a. The corresponding positions are preferred.

The screw 56 is screwed into the screw hole 55b of the horizontal adjusting member 55 through the elongated hole 51b of the base 51 to fix the horizontal adjusting member 55 to the base 51.

The first rotation support member 57 is shown in FIGS.
As shown in FIG. 2, the two columns are fixed on the horizontal adjusting member 55, and the side surface of the projection lens 30 on the cross dichroic prism 29 side is sandwiched by two fulcrums 57a, and the projection lens 57a is centered around these two fulcrums 57a. 30 is configured to be rotatable.

As shown in FIGS. 5 to 7, the vertical adjustment member 58 includes a second rotation support member 59 and a horizontal adjustment member 55.
And the arrow R shown in FIG. 6 centered on the fulcrum 58a.
A top plate 58b that is rotatable in one direction and has a substantially disc shape;
An outer peripheral wall 58c is provided upright along the outer periphery of the top plate 58b, and a through hole 58d is provided at the center of the top plate 58b. In addition, the vertical adjustment member 58 includes an outer peripheral wall 58c.
Has a plurality of inclined surfaces 58e whose height continuously changes in the direction of the arrow Y shown in FIGS.
e has a substantially sawtooth shape in which the height in the arrow Y direction increases or decreases at a predetermined cycle in the outer peripheral direction of the top plate 58b. Further, the vertical adjustment member 58 is arranged along the outer peripheral side of the outer peripheral wall 58c in the circumferential direction, and the amount of displacement in the arrow Y direction shown in FIGS. 4 to 6, that is, the scale 5 corresponding to the inclination of the projection lens 30.
8f and a lever opening 58g into which a lever (not shown) for adjusting the above-described displacement amount of the second rotation support member 58 is inserted are provided.

The second rotation support member 59 is shown in FIGS.
, The projection lens 30 has a substantially U-shape.
The side surface on the exit side of is squeezed between two fulcrums 59a, and the projection lens 30 is rotatable about these two fulcrums 59a. Further, the second rotation support member 59 is displaced in the direction of the arrow Y in FIGS. 4 to 6 so that the projection lens 30 is tilted about the fulcrum 57a of the first rotation support member 57. Has been done. Further, the second rotation support member 59 is provided with a through hole 59b in a substantially central portion at a position facing the vertical adjustment member 58.

Further, as shown in FIG. 8, the base 51 has an adjusting leg 51c for adjusting the height of the projector device 1 on which an image is projected, and an exterior portion 51d. The image can be appropriately projected on the screen 2 by adjusting the optical axis of the projection lens 30 as the optical axis Lc.

Further, in the projector device 1, as shown in FIGS. 5 to 7, the through hole 59 of the second rotation support member 59 is used.
b, the through hole 58d of the vertical adjustment member 58, and the horizontal adjustment member 5
5, a coil spring 61 is provided between the screw 60 penetrating the through hole 55f of the No. 5 and the head of the screw 60 and the second rotation support member 59.
It has and.

The screw 60 penetrates the coil spring 61, the through hole 59b of the second rotation supporting member 59, and the through hole 58d of the vertical adjusting member 58, and is screwed into the through hole 55f of the horizontal adjusting member 55. It is supposed to do. A washer may be inserted between the screw 60 and the coil spring 61.

The coil spring 61 is a so-called spring having a substantially coil shape, and is configured to bias the second rotation support member 59 and the vertical adjustment member 58 toward the horizontal adjustment member 55. As the coil spring 61, another elastic body may be used instead of the spring. For example, a leaf spring or the like is preferable for effectively utilizing the narrow space in the base 51, and is useful for downsizing the projector device 1. Is.

In the projector device 1 configured as described above, the vertical rotation adjusting member 58 is rotated in the direction of arrow R1 shown in FIG. The projection lens 53 can be displaced in the direction of the arrow Y shown and the projection lens 53 can be tilted about the fulcrum 57a of the first rotation support member 57 accordingly. In addition, the projector device 1 is
The horizontal adjustment member 55 is rotated about the fulcrum 55a in the direction of arrow R2 shown in FIGS.
Can be rotated in the direction of arrow R2 about the fulcrum 55a. As a result, the projector device 1 can adjust the horizontal and vertical tilt angles with respect to the screen 2 and project an appropriate image.

Next, the operation of each part of the mechanism for adjusting the tilt angle of the projector device 1 will be described.

As shown in FIG. 4, when the optical axis of the projection lens 30 is horizontal to the base 51, the projector apparatus 1 projects light in the direction indicated by the optical axis La. On the other hand, in the projector device 1, as shown in FIG. 8, the normal line of the screen 2 is the optical axis L of the projection lens 30.
When it has a tilt angle with respect to c, that is, when it is tilted with respect to the cross dichroic prism 29 and each liquid crystal panel unit, the tilt angle in the vertical direction and the horizontal direction is adjusted.

First, when adjusting the vertical tilt angle, the lever opening 58g of the vertical adjusting member 58 is passed through the opening 51a of the base 51 so that the user has a value corresponding to the tilt angle. Inserted in, for example,
By rotating the lever, the vertical adjustment member 58
Depending on the rotation direction, the fulcrum 58a is rotated in the direction of arrow R1 shown in FIG. By rotating the vertical adjustment member 58, the inclined surface 58e and the inclined surface 55d of the protrusion 55e provided on the horizontal adjustment member 55 come into contact with each other,
It is displaced in the arrow Y direction shown in FIGS. 4 and 6.

Next, with the displacement of the vertical adjustment member 58, the second rotation support member 59 that abuts the vertical adjustment member 58,
Pushed up by the vertical adjustment member 58, the height is displaced in the arrow Y direction shown in FIGS. 4 to 6.

Next, with the displacement of the second rotation support member 59, the projection lens 30 sandwiched by the fulcrums 59a of the second rotation support member 59 has the second rotation support member on the fulcrum 59a side. When pushed up by 59 and tilted in the direction perpendicular to the optical axis La, for example, when tilted upward, the optical axis of the projection lens 30 becomes the optical axis Lb.

When the vertical adjustment member 58 is rotated, the scale 58f seen from the opening 51a of the base 51 is also rotated, and the user can easily adjust the vertical tilt angle with reference to the scale 58f. You can do it. In this way, the vertical adjustment member 58 is rotated by the user with reference to the scale 58f, so that the vertical tilt angle is adjusted.

Next, when adjusting the tilt angle in the horizontal direction, the user loosens the screw 56 passed through the elongated hole 51b of the base 51, and the head of the screw 56 is indicated by an arrow R2 shown in FIGS. 6 and 7. The horizontal adjustment member 55 by being moved in the direction
Rotates in the direction of arrow R2 about the fulcrum 55a. The surface of the horizontal adjustment member 55 on which the screw holes 55b are provided and the surface of the base 51 that contacts the horizontal adjustment member 55 are shown in FIG.
Also, it is preferable that the curved surface is formed along the arrow R2 direction shown in FIG. 7, whereby the horizontal adjustment member 55 can smoothly rotate about the fulcrum 55a.

Next, the horizontal adjusting member 55 rotates in the direction of arrow R2 shown in FIGS. 6 and 7, so that the first rotary supporting member 57 and the second rotary supporting member on the horizontal adjusting member 55 are rotated. The projection lens 30 supported by 59 rotates in the direction of arrow R2.

Next, the user moves the head of the screw 56 so that the horizontal adjusting member 55 is located at a desired position, and again the screw 5 is moved.
By re-tightening 6, the horizontal adjustment member 55 is fixed and the horizontal tilt angle is adjusted.

As described above, the projector device 1
Allows the vertical and horizontal tilt angles to be adjusted. Furthermore, the screen 2 displays an adjustment menu for the user to adjust the tilt angle as an image.
It has a system for projecting on. So, in the following,
A system in which the user projects an adjustment menu for adjusting the tilt angle on the screen 2 as an image will be described.

As shown in FIG. 9, the projector device 1 includes a video signal processing unit 81 which outputs RGB analog three primary color signals by decoding a video signal input from the outside and converting it into a matrix, and a video signal processing unit. Part 81
A / D (Analogue / Digital) converter 82 for converting the analog three primary color signals output from the digital signal into digital signals
And a digital signal processing unit for converting the digital signal converted by the A / D converter 82 into a display clock signal suitable for each of the liquid crystal panel units 19, 22, and 28 to perform processing such as pixel number conversion and trapezoidal distortion correction. 85 and.

In the projector device 1, the RGB digital three primary color signals output from the digital signal processing section 85 are supplied to the drivers (not shown) provided for the liquid crystal panel sections 19, 22 and 28, respectively. The panel units 19, 22, 28 are driven. The liquid crystal panel unit 1
When 9,22,28 are analog drive, D / A
The driver is built in the converter.

Further, in the projector device 1, when the video signal input from the outside is a digital signal other than the composite which is a so-called analog signal, for example, a computer signal of RGB, a selector is provided and the above-mentioned video is provided. The input may be directly input to the A / D converter 82 without the signal processing unit 81.

Further, the projector device 1 includes a ROM (Read Only Memor) storing various programs and data.
y) 83, a RAM (Random Access Memory) 84,
A display microcomputer 87 for controlling the liquid crystal panel unit, and a controller 88a and a controller 8 for various inputs by the user.
A receiving unit 88b that receives a signal from 8a, and a CPU (Central Processing Unit) 89 that controls the entire system
Based on the control signal of the CPU 89, the control of the entire system and the display of the menu image are performed.

ROM 83, RAM 84 and CPU 89
Are configured to transfer data and control signals via the pass line BUS. The CPU 89
The control signal from the display microcomputer 87 to the display microcomputer 87 is also the pass line BU.
You may make it perform via S.

The ROM 83 is a read-only memory, and stores a program relating to arithmetic processing for realizing the function of controlling each part of the projector device 1. Explaining the part related to the present embodiment, for example, a program for calculating the correction amount of the tilt angle, that is, the tilt correction angle based on the installation conditions of the projector device 1 such as the projection angle and the projection magnification is recorded.

The RAM 84 is a rewritable memory, and stores data and the like necessary for controlling each unit of the projector device 1. Explaining the part related to the present embodiment, for example, it is necessary for the calculation based on the data showing the correspondence between the projection distance and the projection magnification, and the program for correcting the tilt angle obtained by the user operating the menu. Data is written and stored.

The display microcomputer 87 uses the CPU 89 based on the signal from the controller 88a received by the receiver 88b.
A menu including adjustment items and function selection items of the projector device 1 is superimposed on the RGB digital three primary color signals output from the digital signal processing unit 85 and displayed by a control signal transmitted from the projector device 1.

The controller 88a and the receiver 88b are
For example, it is an input means that can be remotely controlled using infrared rays or radio waves, and the user can use the controller 8
By operating 8a, a signal is transmitted from the controller 88a and the receiving unit 88b receives this signal, and the CPU 8
Enter in 9.

The CPU 89 controls the entire system of the projector device 1 and performs arithmetic processing for realizing the functions of the respective parts.

Explaining the part related to the present embodiment, the CPU 89 controls the display microcomputer 87 based on the control signal for the menu obtained through the receiving unit 88b, for example, and displays the menu on the screen. Also, C
The PU 89 reads out predetermined data stored in the RAM 84 and executes a program for calculating the tilt correction angle read out from the ROM 83. Further, the CPU 89
Based on the result of the distortion adjustment performed by the user operating the menu, the digital signal processing unit 85 is controlled to perform the trapezoidal distortion correction processing.

The projector device 1 having the above-described configuration is based on the input video signal and is based on the liquid crystal panel unit 1
9, 22, 28 are driven to spatially modulate the light emitted from the light source 11, and the projection lens 30 causes the screen 2
Display the image on. Further, in the projector device 1, the CPU 89 controls the display microcomputer 87 based on the control signal of the menu transmitted from the controller 88a and obtained via the receiving unit 88b, and the menu is superimposed and displayed on the screen. Further, in the projector device 1, the user operates the controller 88a to select a menu, or the like.
The CPU executes a program for calculating the tilt correction angle read from the ROM 83 based on the data written in M84.
89 executes and outputs the result to the display microcomputer 87 to project it on the screen 2 as a screen.

Here, the adjustment menu projected as an image on the screen 2 will be described.

As shown in FIG. 8, the projector device 1 is installed so that the optical axis Lc of the projection lens 30 has a predetermined driving angle β with respect to the normal line of the screen 2.

The projector device 1 has, as the image of the adjustment menu projected on the screen 2, for example, "hue", "color depth", and "brightness" for adjusting the image quality of the image projected on the screen 2. , "Sharpness",
Items such as “distortion adjustment” and items such as “treble” and “bass” for adjusting the sound output from an external speaker are prepared.

In the projector device 1, the CPU 89 controls the R
By executing the program read from the OM 83, the image indicated by the name and / or icon of the item of the adjustment menu described above is superimposed on the image based on the video signal input from the outside and projected on the screen 2.

Next, the user visually recognizes the image of the adjustment menu projected on the screen 2 and selects the item of the menu to be adjusted from the controller 88a. By transmitting the information and the receiving unit 88b receiving the information, the selected menu item is adjusted.

Here, in the projector device 1, when “distortion adjustment” is selected by the user from the above selection items, for example, as shown in FIG. 10 or FIG.
A pattern image for distortion adjustment is projected on the screen 2.

First, the projector device 1 includes the CPU 89.
However, by controlling the display microcomputer 87, for example, the trapezoidal patterns 91, 92, 93, 94 for distortion adjustment and “pa
"ttern" 95 and "distance" 96,
Screen 2 with "angle" 97 as one image
To project.

The trapezoidal patterns 91, 92, 93 and 94 are
It is a plurality of trapezoidal patterns showing a shape for correcting trapezoidal distortion under a predetermined condition. Each trapezoidal pattern 91, 9
Pattern numbers 0, 1, 2, 3 are assigned to 2, 93, 94, and the pattern numbers are projected as an image on the screen 2 together with the trapezoidal patterns 91, 92, 93, 94.

"Pattern" 95 indicates a pattern number corresponding to the trapezoidal patterns 91, 92, 93, 94 selected by the controller 88a by the user under the control described later in detail.

“Distance” 96 indicates, for example, the distance in the optical axis La direction of the projection lens 30 between the installed projector apparatus 1 and the screen 2, and indicates the value measured by the distance measuring means (not shown). There is. Note that the “distance” 95 may be such that the user actually measures the distance and directly inputs the distance from the controller 88a to indicate the input value.

The "angle" 97 is a trapezoidal pattern 91, 92, 93, 94 selected by the user by the controller 88a and "dista" by the control which will be described in detail later.
nce ”96 and data corresponding to the tilt angle ρ shown in Expression 1.

In the projector device 1, the user visually recognizes the trapezoidal pattern image for adjusting the trapezoidal distortion as described above, and the trapezoidal pattern 9 having a substantially rectangular shape is formed.
The CPU 89 performs the following processing by selecting from 1, 92, 93 and 94 and inputting the pattern number based on the selected trapezoidal pattern by the controller 88a.

The CPU 89 uses the pattern number input from the controller 88a to determine the optical axis Lc of the projection lens 30.
And the normal of the screen 2, that is, the driving angle β
From the distance in the optical axis La direction of the projection lens 30 between the projector device 1 and the screen 2 obtained from the distance measuring means (not shown), and the data showing the correspondence relationship between the projection distance and the projection magnification stored in the RAM 84. The interpolation calculation based on the equation (1) is performed to calculate the magnification data m shown in Expression 1. Further, the CPU 89 sets the pattern number currently selected from the pattern numbers input from the controller 88a,
As indicated by “distance” 95, the display microcomputer 87 is controlled.

Next, the CPU 89 calculates the tilt angle ρ from the driving angle β and the magnification data m based on the relationship shown in the equation 1, and sets the value of the scale 58f of the vertical adjusting member 58 corresponding to the tilt angle ρ, The display microcomputer 87 is controlled as indicated by "angle" 97.

Here, when the driving angle β is 0, the tilt angle ρ is 0, so that the trapezoidal pattern 91 is selected by the user as shown in FIG.
The pattern number of “n” 95 is 0, and the number of “angle” 97 is 0.
Therefore, it is understood that it is not necessary to rotate the vertical adjustment member 58. On the other hand, when the driving angle β is not 0, the tilt angle ρ is not 0, and therefore, as shown in FIG.
The trapezoidal pattern 93, which has a shape close to a square due to the trapezoidal distortion generated by, is selected by the user,
The pattern number of “pattern” 95 is 2, “ang”
“Le” 97 becomes 0.3, and the vertical adjustment member 58 is rotated by 0.3 scale of the scale 58f.

As described above, the projector device 1 uses the distortion adjusting trapezoidal pattern selected by the user, that is, the trapezoidal pattern that is substantially rectangular when projected, and the driving angle β.
CPU 89 calculates the swing angle ρ, and the value corresponding to the swing angle ρ is shown in “angle” 97.
The vertical adjustment member 5 is checked while the user confirms the scale 58f of the vertical adjustment member 58 based on the value shown in the “gle” 97.
By rotating 8 the tilt angle of the projection lens 30 in the vertical direction is adjusted.

When the user presses the Enter button (not shown) of the controller 88a to return from the distortion adjustment pattern to the normal screen projection mode, the projector device 1 is selected as described above according to the control signal from the CPU 89. The digital signal processing unit 85 performs a trapezoidal distortion correction process corresponding to the trapezoidal pattern, and an image of a predetermined size is projected on the screen 2 in a rectangular shape that is substantially the same as the selected trapezoidal pattern.

In the projector device 1 described above, the case where the number of trapezoidal patterns is four is shown, but by further subdividing the trapezoidal pattern into four or more, trapezoidal distortion and vertical tilt angle can be further reduced. Can be adjusted.

In the projector device 1 described above, 4
Although an example in which two trapezoidal patterns are displayed at the same time is shown, only the trapezoidal patterns corresponding to the pattern numbers input by the user from the controller 88a are sequentially displayed so that the trapezoidal patterns are subdivided. The relationship between the pattern and the pattern number may be easily visually recognized. Further, in accordance with the pattern number input from the controller 88a by the user, the trapezoidal distortion correction processing of the image based on the video signal input from the outside is sequentially performed, and the shape of the outer peripheral portion of the image is a trapezoidal pattern for distortion adjustment. May be used instead of.

As described above, in the projector device 1, the vertical adjustment member 5 is used by the user to adjust the vertical tilt angle from the image of the adjustment menu projected on the screen 2.
Since the amount of rotation of 8 can be known, it is possible to easily correct the vertical focus shift and the trapezoidal distortion of the image projected obliquely with respect to the screen 2. Also,
In the projector device 1, the horizontal adjustment member 55 is a fulcrum 55a.
Since it is rotatable about the center, the horizontal tilt angle can be adjusted, and even when the image is obliquely projected on the screen 2, it is possible to project an image without focus deviation.

Further, in the projector device 1, even when the projector device 1 is disposed with the optical axis of the projection lens 30 inclined with respect to the projection surface, the tilt angle is adjusted to adjust the tilt angle from the plurality of liquid crystal panel portions. It is possible to eliminate the focus shift of the image on the screen 2 and project a uniform image without causing pixel shift in the combined image.

Further, the projector device 1 can easily adjust the tilt angle corresponding to the setting condition without complicated and delicate adjustment of the tilt angle, and after setting the predetermined tilt angle, When readjustment or fine adjustment of the tilt angle is required, it is possible to promptly deal with it without performing complicated parts replacement.

Furthermore, since the projector device 1 can easily grasp the current adjustment state of the tilt angle by the scale 58f, the projector device 1 sets the tilt angle to a predetermined one without any trouble such as exchanging parts, and it is fine at the installation place. Can be adjusted.

Furthermore, the projector device 1 has the GUI (Graphical User Interface) described above with respect to the installation state related to the driving angle of the optical axis of the projection lens 30 with respect to the screen 2.
ce) can be easily grasped.

Furthermore, in the projector device 1, the CPU 89 performs the calculation processing of the tilt angle corresponding to the above-mentioned grasped installation state, and since the information is shown to the user, the work of setting the tilt angle can be performed quickly. Therefore, the efficiency of the installation adjustment work of the projector device 1 is improved.

As another mechanism for adjusting the vertical tilt angle in the projector device 1 described above,
A configuration as shown in FIGS. 12 and 13 may be adopted. Therefore, in the following, a mechanism for adjusting the tilt angle as shown in FIGS. 12 and 13 will be described, but the same configurations as those described above will be denoted by the same reference numerals and description thereof will be omitted.

The projector device 1 includes two flat plate portions 101 that support the projection lens 30 on the side surface of the projection lens 30.
And two stepped spacers 1 that support the flat plate portion 101.
02, a support spacer 103 for supporting the two stepped spacers 102, and a screw 104 for fixing the flat plate portion 101 and the support spacer 103.

The flat plate portion 101 is a flat plate member provided on both sides in parallel so as to keep the projection lens 30 horizontal, and holds the projection lens 30 therebetween. Further, the flat plate portion 101 is provided with a plurality of screw holes 101a through which the screws 104 are inserted.

The staircase spacer 102 has a flat upper surface that abuts the flat plate portion 101, and a staircase surface 102a that is formed in a substantially staircase shape and has a plane whose height changes at a predetermined interval on the side facing the upper surface. have. In addition, the staircase-shaped spacer 102 has a screw hole 102b provided as an elongated hole in the staircase direction in a region corresponding to the staircase surface 102a.

The support spacer 103 has a concave portion 103a corresponding to the projection lens 30 and a substantially stepped concave portion 103b corresponding to the stepped spacer 102, and the projection lens 30 is arranged at a position corresponding to the concave portion 103a. The stepped spacer 102 is provided at a position corresponding to the recess 103b. Further, the support spacer 103 is provided with a plurality of screw holes 103c into which screws 104 are screwed. Further, the support spacer 103 is fixed on the horizontal adjustment member 55.

The screw 104 is screwed into the screw hole 103c through the screw hole 101a and the screw hole 102b so that the flat plate portion 101 and the support spacer 103 can be fixed through the stepped spacer 102. Has been done.

In the projector device 1 configured as described above, as shown in FIG. 13, the stepped spacer 102 is provided between the flat plate portion 101 and the support spacer 103, and the concave portion 103 is provided.
b and the staircase surface 102a are combined so as to correspond to each other,
When the screw 104 is screwed into the screw hole 103c through the screw hole 101a and the screw hole 102b, the projection lens 3
0 is fixed. Further, in the projector device 1, the user loosens the screw 104, shifts the surface where the staircase surface 102a of the staircase spacer 102 and the recess 103b contact by one step, and tightens the screw 104 again.
a and the projection lens 30 by the height of the stairs of the recess 103b
It is possible to displace the emission side of the in the direction of the arrow Y shown in FIG.

In this case, the projector device 1 displays "an" in the image of the distortion adjustment item projected on the screen 2.
The "gle" 97 indicates the position of the staircase surface 102a corresponding to the tilt angle, and the user adjusts the position of the staircase spacer 102 according to the value of "angle" 97 to allow the projection lens 30 to vertically tilt. The corners can be adjusted easily.

In the projector 1 described above, the mechanism for manually adjusting the tilt angle has been described. However, a drive mechanism such as a motor is used to automatically adjust the tilt angle according to a value input by the user. It may be a mechanism for adjustment, in which case convenience for the user is also improved.

In the projector device 1 described above, the case where the transmissive liquid crystal panel is used as the light modulation element has been described, but not limited to the transmissive type, the reflective liquid crystal panel is used as the reflective light modulation element. Good. Hereinafter, an optical system when the projector device 1 uses a reflective liquid crystal panel will be described. In addition, about the same structure as the case where the liquid crystal panel portions 19, 22, and 28 having the above-mentioned transmissive liquid crystal panel are used, the same reference numerals are given and the description thereof is omitted.

The projector device 1 has, as an optical system, a light source 11 and an optical path order of emitted light emitted from the light source 11,
A UV / IR cut filter 12 that cuts light in the ultraviolet and infrared wavelength bands, fly-eye lenses 13 and 14 that make the illuminance distribution uniform, and a condenser lens 15 that condenses light.
A reflection mirror 110 that totally reflects the light, a polarization beam splitter 111 that reflects the S-polarized component of the incident light and transmits the P-polarized component, a dichroic mirror 112B that reflects blue light and transmits other colored light, and a red color. Dichroic mirror 112 that reflects light and transmits other color lights
R and the reflective liquid crystal panel sections 113R, 113G, 11
3B and the projection lens 30 are provided.

The emitted light emitted from the light source 11 is UV /
Light in the ultraviolet and infrared wavelength bands is cut by the IR cut filter 12, the illuminance distribution is made uniform by the fly-eye lenses 13 and 14, and is condensed by the condenser lens 15 to be guided to the reflection mirror 110 and reflected. It is reflected by the mirror 110 and guided to the polarization beam splitter 111.

The emitted light guided to the polarization beam splitter 111 is transmitted as a unnecessary light to the outside of the optical system through the P-polarized component, and is reflected to the dichroic mirror 112B as the S-polarized component.

The light guided to the dichroic mirror 112B is reflected by the blue light to be guided to the liquid crystal panel section 113B, and the other colored lights, that is, the red light and the green light are transmitted and guided to the dichroic mirror 112R.

The blue light guided to the liquid crystal panel section 113B is spatially modulated by the liquid crystal panel section 113B on which a pattern corresponding to a blue image is displayed, the polarization plane is rotated, and reflected as a P polarized component. It is returned to the dichroic mirror 112B. The blue light returned to the dichroic mirror 112B is reflected by the dichroic mirror 112B and returned to the polarization beam splitter 111.

On the other hand, the light guided to the dichroic mirror 112R is reflected by the red light and is reflected by the liquid crystal panel section 113R.
To the liquid crystal panel 113G.

The red light guided to the liquid crystal panel section 113R is spatially modulated by the liquid crystal panel section 113R on which a pattern corresponding to a red image is displayed, the polarization plane is rotated, and reflected as a P polarization component. It is returned to the dichroic mirror 112R. The red light returned to the dichroic mirror 112R is reflected by the dichroic mirror 112R, returned to the dichroic mirror 112B, transmitted through the dichroic mirror 112B, and returned to the polarization beam splitter 111.

Then, the green light guided to the liquid crystal panel section 113G is spatially modulated by the liquid crystal panel section 113G on which a pattern corresponding to a green image is displayed, the polarization plane is rotated, and reflected as a P polarization component. Then, it is returned to the dichroic mirror 112R. Dichroic mirror 11
The green light returned to 2R is the dichroic mirror 112.
After passing through R, it is returned to the dichroic mirror 112B,
It is transmitted through the dichroic mirror 112B and returned to the polarization beam splitter 111.

The red light, the green light and the blue light returned to the polarization beam splitter 111 are supplied to the liquid crystal panel sections 113R and 113R, respectively.
The light having the P-polarized component is modulated by 113G and 113B, so that the light is transmitted through the polarization beam splitter 111 to be combined light, which is guided to the projection lens 30 and the projection lens 3
0 causes the image to be projected on the screen 2 as an image.

When the projector device 1 has such an optical system, the light source 11, the UV / IR cut filter 12, the fly-eye lenses 13 and 14, and the condenser lens 1 are used.
5, a reflection mirror 110, a polarization beam splitter 111,
The dichroic mirrors 112B, 112R and the liquid crystal panel sections 113R, 113G, 113B are fixedly arranged, and the tilt angle can be adjusted by providing a mechanism for tilting the optical axis of the projection lens 30.

[0139]

As described above, according to the projector device of the present invention, the tilt angle is adjusted even when the optical axis of the projection lens of the projector device with respect to the projection surface is inclined and the projector device is arranged. As a result, the composite image from the plurality of light modulators can eliminate the pixel shift and eliminate the focus shift of the image on the projection surface to project a uniform image.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an optical system of a projector device to which the present invention is applied.

FIG. 2 is a diagram illustrating an operation of a liquid crystal panel section in the optical system.

FIG. 3 is a diagram illustrating an operation of a liquid crystal panel section in the optical system.

FIG. 4 is a diagram illustrating a mechanism for tilting a projection lens.

FIG. 5 is a diagram illustrating a mechanism for tilting a projection lens.

FIG. 6 is an exploded perspective view illustrating a mechanism for tilting the projection lens.

FIG. 7 is an exploded perspective view illustrating a mechanism for tilting the projection lens.

FIG. 8 is a diagram showing an installed state of the projector device.

FIG. 9 is a block diagram showing an image and sound processing mechanism of the projector device.

FIG. 10 is a diagram illustrating a menu image for adjusting a tilt angle projected on a screen.

FIG. 11 is a diagram illustrating a menu image for adjusting a tilt angle projected on a screen.

FIG. 12 is a diagram illustrating another mechanism for tilting the projection lens.

FIG. 13 is a diagram illustrating another mechanism for tilting the projection lens.

FIG. 14 is a diagram showing a configuration of another optical system of a projector device to which the present invention has been applied.

[Explanation of symbols]

1 projector device, 2 screen, 29 cross dichroic prism, 30 projection lens, 51 base,
52 support member, 53 support plate, 54 screw, 55 horizontal adjustment member, 56 screw, 57 1st rotation support member,
58 vertical adjustment member, 59 second rotation support member, 60
Screw, 61 coil spring

Claims (5)

[Claims] 1. A light source that emits light, a separating means that separates the emitted light emitted from the light source for each wavelength band of different colors, and a light of the wavelength band of each color that is separated by the separating means is modulated. A plurality of light modulation means, fixed to a predetermined position with respect to the plurality of light modulation means,
A combining means for combining the light in the wavelength bands of the respective colors modulated by the plurality of light modulating means, a projection means for projecting the combined light combined by the combining means, and a projection means for the plurality of light modulating means. A projector device comprising: an adjusting unit that changes the angle formed by the optical axis by tilting the projection unit. 2. The adjusting means continuously or stepwise changes the angle formed by the optical axis of the projection means with respect to the plurality of light modulation means, and holds the projection means at a predetermined angle. Projector device. 3. The projector device according to claim 2, wherein the adjusting means is provided with a scale corresponding to an angle formed by an optical axis of the projecting means with respect to the plurality of light modulating means. 4. The projector device according to claim 3, further comprising information display means for projecting, as an image, information on correction of trapezoidal distortion of an image projected by said projection means by said projection means. 5. A calculating means for calculating a value corresponding to an angle formed by the optical axes of the projecting means with respect to the plurality of light modulating means, based on information about the trapezoidal distortion projected by the projecting means by the information displaying means. The projector device according to claim 4, further comprising: