JPH11202413A - Projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the projector device which can make a lamp unit small- sized and has its optical axis adjusted with ease. SOLUTION: A lamp 21 is stored in a lamp duct 33, which is stored in a lamp box 34. A bracket 35 for adjustment is mounted on the lamp box 34. A longitudinally long slide hole 35c is formed in the front of the bracket 35 for adjustment and the lamp duct 33 is fixed with screws 37. The slide hole 35c is positioned in the blind zone of the lamp 21. Slide holes 34c are formed on the top and reverse surfaces of the lamp box 34, which is fixed with screws 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device such as a liquid crystal projector, and more particularly to a projector device having an improved optical axis adjusting mechanism of a lamp.

[0002]

2. Description of the Related Art Since there is an increasing demand for displaying images on a large screen, projector devices for projecting images on a screen are gradually becoming widespread. FIG. 8 is a diagram showing a general configuration of the projector device. Here, the configuration of the liquid crystal projector is shown, and its operation will be described.

In FIG. 8, light emitted from a lamp 1 is condensed by condenser lenses 2 and 3 and is incident on a cold mirror 4. The light reflected by the cold mirror 4 enters the color separation mirror 5. Of the light incident on the color separation mirror 5, red (R) light passes through the color separation mirror 5 and is incident on the mirror 6. This R light is reflected by the mirror 6 and enters the liquid crystal panel 12.

[0004] The blue (B) / green (G) light is reflected by the color separation mirror 5 and enters the color separation mirror 7. Among the light incident on the color separation mirror 7, the G light is reflected by the color separation mirror 7 and is incident on the liquid crystal panel 13. Of the light that has entered the color separation mirror 7, the B light passes through the relay lens 8, the mirror 9, the relay lens 10, and the mirror 11 to adjust the optical path length to the optical path length of the R light and the G light. Is incident on.

As is well known, a voltage corresponding to an image is applied to the liquid crystal panels 12 to 14, and R, G,
The B lights are respectively modulated. The light of each color output from the liquid crystal panels 12 to 14 is combined by the combining prism 15 and projected on the screen 17 by the projection lens 16. Thus, an image is displayed on the screen 17.

In the projector device configured as described above, the brightness on the screen is increased.
In order to optimize the luminance distribution on the screen, it is necessary to adjust the optical axis of the lamp 1 accurately. In this type of projector device, a xenon arc lamp in a lamp package may be used as an example of the lamp 1. In a xenon arc lamp packaged with a lamp, the optical axis cannot be adjusted by adjusting the arc generating portion. Therefore, it is necessary to provide the lamp unit with an optical axis adjusting mechanism.

Here, a description will be given of an optical axis adjusting mechanism of a lamp in a conventional projector device. 5 is a perspective view showing an example of a conventional optical axis adjusting mechanism, FIG. 6 is an exploded perspective view of FIG. 5, and FIG. 7 is a perspective view showing a xenon arc lamp. As shown in FIG. 7, a xenon arc lamp 21 (hereinafter, lamp 21) corresponding to the lamp 1 in FIG. 8 is provided with a heat sink 22 for cooling the lamp 21, which is an electrode of the lamp 21. , 22 are mounted.
The heat sink 22 has an opening 22a in the center thereof through which the lamp 21 is inserted, and a number of fins 22b are formed radially. FIG. 7 shows a state where the heat sink 22 is detached from the lamp 21.

The lamp 21 to which the heat sink 22 is attached is connected to the hollow portion 2 of the lamp duct 23 shown in FIGS.
It is positioned and fixed in 3a. As shown in FIGS. 5 and 6, the lamp duct 23 is sandwiched between slide plates 24, 24 in the optical axis direction. The Z axis in FIG. 5 is the optical axis of the lamp 21. The slide plate 24 has the opening 2
4a, and three guide pins 24b are provided. The guide pin 24a is inserted into a horizontally elongated slide hole 23b provided in the lamp duct 23 to integrate them. Since the slide hole 23b is horizontally long, the lamp duct 23 has a small amount with respect to the slide plate 24.
It is movable in the X-axis direction in FIG.

The outer sides of the slide plate 24 are sandwiched between fixed plates 25,25. The fixing plate 25 has an opening 25a and is provided with a vertically elongated slide hole 25b. The guide pins 24b of the slide plate 24 are inserted into the slide holes 25b to integrate them. Slide hole 2
Since 5b is vertically long, the lamp duct 23 and the slide plate 24 can be moved in the Y-axis direction in FIG. FIG.
The X-axis direction in FIG. 8 corresponds to the vertical direction of the paper surface in FIG. 8, and the Y-axis direction in FIG. 5 corresponds to the direction perpendicular to the paper surface in FIG.

The fixing plate 25 is fixed to the lamp base 26, and the adjustment bracket 27 is fixed to the fixing plate 25. The lamp duct 23, the slide plate 24 and the fixed plate 25 are connected to a slide screw 28 (FIG. 5).
(Shown in FIG. 2). Note that the slide screw 28 does not firmly fix the lamp duct 23, the slide plate 24, and the fixing plate 25, but integrates them with a margin. Therefore, the position of the lamp duct 23 can be adjusted in the X and Y axis directions as described later.

In such a configuration, the adjustment bracket 27 is formed with screw holes 27a to 27d.
The screw hole 27a has a pulling screw 29a for moving and adjusting the lamp duct 23 in the X-axis direction in FIG.
(Shown in FIG. 5) is mounted, and a fixing screw 29b (shown in FIG. 5) for fixing the position of the lamp duct 23 in the X-axis direction is mounted in the screw hole 27b. The screw hole 27c is provided with a pulling screw 29c (shown in FIG. 5) for moving and adjusting the lamp duct 23 in the Y-axis direction in FIG. 5, and the screw hole 27d is provided in the Y-axis direction of the lamp duct 23. A fixing screw 29d (shown in FIG. 5) for fixing the position is mounted.

These pulling screws 29a, 29
c, the position of the lamp duct 23 in the X-axis and Y-axis directions with respect to the lamp base 26 is adjusted, and the lamp duct 2 is fixed by the fixing screws 29b and 29d.
3 is fixed in the X-axis and Y-axis directions. In this way, the optical axis of the lamp packaged lamp 21 can be adjusted.

[0013]

In the conventional projector described above, the adjusting bracket 27 is mounted outside the lamp duct 23, and the screws 29a to 29d protrude to the outermost shape. There was a problem that the size was increased. Further, once the lamp duct 23 is fixed by one of the fixing screws 29b and 29d, the pulling screws 29a and 29c cannot be adjusted, and X
The axis and Y-axis directions could not be adjusted one by one. Therefore, there is also a problem that the optical axis adjustment is not easy.

The present invention has been made in view of such a problem, and can reduce the size of a lamp unit.
It is an object of the present invention to provide a projector device that can easily adjust the optical axis.

[0015]

According to the present invention, there is provided a projector apparatus having a lamp (21) for emitting light for displaying an image on a screen. A housing (33, 34) having a cavity (33a, 34a) in the optical axis direction of the lamp and accommodating the lamp, and an opening (35) facing the cavity.
a) an adjustment bracket (35) attached to the storage body having a), and provided at a portion of the adjustment bracket that is a blind spot of the lamp in a plane orthogonal to the optical axis of the lamp; A first position adjustment / position fixing mechanism (35c, 37) configured to adjust a relative position between a body and the adjustment bracket and to fix the adjusted storage body and the adjustment bracket. It is intended to provide a projector device characterized by the above.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a projector device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an embodiment of the projector device of the present invention, and FIG.
Is a perspective view showing an embodiment of the projector device of the present invention,
FIG. 3 is a front view showing one embodiment of the projector device of the present invention, and FIG. 4 is a cutaway perspective view showing one embodiment of the projector device of the present invention. 1 to 4, the same parts as those in FIG. 7 are denoted by the same reference numerals.

In FIG. 1 to FIG. 4, a lamp 21 is provided before and after a xenon arc lamp 21 (hereinafter, lamp 21).
And heat sinks 22, 22 for cooling the lamp 21 are mounted. Heat sink 22
As described with reference to FIG. 7, the central portion has an opening 22a through which the lamp 21 is inserted, and a large number of fins 22b are formed radially. The lamp 21 to which the heat sink 22 is attached is positioned and fixed in the hollow portion 33a of the lamp duct 33 as the first housing. Note that X in FIG.
The axes, Y axis, and Z axis directions are the same as the X axis, Y axis, and Z axis directions in FIG. 5, and the X axis is the optical axis.

The lamp duct 33 containing the lamp 21 and the heat sink 22 is inserted into a hollow portion 34a of a lamp box 34, which is a second container. Lamp duct 3
As will be described later, for example, four optical axis adjustment tool fixing claws (adjustment portions) 33b are formed on the component 3. In the lamp box 34, four windows 34b are formed in accordance with the number of the fixed claws 33b. When the lamp duct 33 is stored in the lamp box 34, as shown in FIG.
Faces the window 34b.

Further, an adjustment bracket 35 is attached to the front end of the lamp box 34. The adjustment bracket 35 has an opening 35 a facing the hollow portion 33 a of the lamp duct 33. The outer circumference of the adjustment bracket 35 is slightly smaller than the inner circumference of the hollow portion 34a of the lamp box 34,
The adjustment bracket 35 is set in the end of the hollow portion 34a of the lamp box 34. At the front ends of the upper and lower surfaces of the lamp box 34, horizontally long slide holes 34c are formed, for example, near four corners. Four screw holes 35b are also formed on the upper and lower surfaces of the adjustment bracket 35 in accordance with the number of the slide holes 34c.

The adjustment bracket 35 is housed in the end of the hollow portion 34a of the lamp box 34, and the X-axis direction fixing screw 36 (shown in FIG. 1) is screwed into the slide hole 34c and the screw hole 35b. 35
And the lamp box 34 are fixed. Slide hole 34a
Is horizontally long, so that the lamp box 34 in which the lamp duct 33 is housed is slightly movable relative to the adjustment bracket 35 in the X-axis direction in FIG.

A vertically elongated slide hole 35c is formed in the front surface of the adjustment bracket 35, that is, in the vicinity of, for example, four corners of a plane (X, Y plane) orthogonal to the optical axis of the lamp 21. . The front surface (end surface) of the lamp duct 33 also has four screw holes 3 according to the number of the slide holes 35c.
3c is formed. Slide hole 35c and screw hole 3
The adjustment bracket 35 and the lamp duct 33 are fixed by screwing a Y-axis direction fixing screw 37 (shown in FIG. 1) into 3c. Since the slide hole 35c is vertically long, the lamp duct 33 can be slightly moved relative to the adjustment bracket 35 in the Y-axis direction in FIG.

As can be seen from FIGS. 2 to 4, the slide hole 35c and the screw 37 of the adjustment bracket 35 are
It is a blind spot of the lamp 21 and is located at a position where the blind spot is located outside the heat sink 22 which is circular as viewed from the optical axis. Therefore, the slide hole 35 c and the screw 37, which are the relative position adjustment / position fixing mechanism of the lamp duct 33 and the adjustment bracket 35 in the Y-axis direction, affect the light emitted from the lamp 21 and the cooling function by the heat sink 22. Without providing, the lamp box 34 can be reduced in size.

The slide hole 3 of the lamp box 34
4a and the screw 36 are a mechanism for adjusting and fixing the position of the lamp box 34 and the adjustment bracket 35 in the X-axis direction relative to each other. The screw 36 has a head part slightly protruding from the lamp box 34. Therefore, the outer shape of the lamp unit can be substantially regarded as the outer shape of the lamp box 34.

In such a configuration, when adjusting the optical axis of the lamp 21, the fixing claw 33 b of the lamp duct 33 is fixed by a jig (not shown) having a micrometer through the window 34 b of the lamp box 34. The lamp duct 33 is moved in the X-axis and Y-axis directions to adjust the position. After adjusting the optical axis of the lamp 21, the screw 3
6 and 37 are fastened to fix the lamp duct 33. In the present embodiment, the fixing claw 33b, which is a convex portion, is used as the adjusting portion formed in the lamp duct 33, but may be a concave portion.
In this case, the lamp duct 33 may be adjusted by inserting or engaging a jig in the recess.

In the structure of the present invention, even if the screw 36 is tightened, the lamp box 34 and the adjusting bracket 35
Is fixed only, the lamp duct 33 is Y
Its position is adjustable in the axial direction. Further, even if the screw 37 is tightened, only the lamp duct 33 and the adjustment bracket 35 are fixed, so that the position of the lamp box 34 can be adjusted in the X-axis direction. When the position of the lamp box 34 is adjusted in the X-axis direction, the position of the lamp duct 33 is also adjusted in the X-axis direction. Therefore, the lamp duct 33 is X
Its position is adjustable in the axial direction.

That is, in the present invention, the position of the lamp duct 3 (the optical axis of the lamp 21) can be adjusted in each of the X-axis and Y-axis directions. Moreover, since the tightening positions of the screw 36 and the screw 37 are located close to each other, adjustment is easy.

By the way, the configuration of the present invention described above is as follows.
Not only the xenon arc lamp 21 but also any other lamp can be applied. In the present embodiment, the lamp 21 having the heat sink 22 is described, but the lamp 21 may not be mounted. The present invention is not limited to the embodiment described above, and can be variously modified without departing from the gist of the present invention.

[0028]

As described in detail above, the projector device of the present invention has a housing having a cavity in the direction of the optical axis of the lamp for accommodating the lamp, and an opening facing the cavity. And a bracket for adjustment to be attached to the storage body,
The adjustment bracket is provided in a portion which is a blind spot of the lamp in a plane orthogonal to the optical axis of the lamp, adjusts a relative position between the housing and the adjustment bracket, and adjusts the storage body and the adjustment bracket. And a position adjustment / position fixing mechanism for fixing the lamp unit, the lamp unit can be reduced in size.

Further, the storage body is composed of a first storage body for storing the lamp and a second storage body for storing the first storage body. A first position adjustment / position fixing mechanism for positioning a relative position;
If a second position adjustment / position fixing mechanism for adjusting the relative position between the second storage body and the adjustment bracket and fixing the adjusted second storage body and the adjustment bracket is provided, The two axial directions can be adjusted one by one, which facilitates optical axis adjustment.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing one embodiment of the present invention.

FIG. 3 is a front view showing one embodiment of the present invention.

FIG. 4 is a cutaway perspective view showing one embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is an exploded perspective view showing a conventional example.

FIG. 7 is a perspective view showing a configuration example of a lamp.

FIG. 8 is a diagram illustrating a general configuration of a projector device.

[Description of Signs] 21 Xenon arc lamp 22 Heat sink 33 Lamp duct (first storage body) 33a Cavity part 33b Fixed claw (adjustment part) 33c Screw hole 34 Lamp box (second storage body) 34a Cavity part 34b Window 34c Slide hole (second position adjustment / position fixing mechanism) 35 Adjustment bracket 35a opening 35b screw hole 35c Slide hole (first position adjustment / position fixing mechanism) 36 X-axis direction fixing screw (second position adjustment / position fixing mechanism) Position fixing mechanism) 37 Y-axis direction fixing screw (first position adjustment / position fixing mechanism)

Claims (6)

[Claims] 1. A projector device having a lamp for emitting light for displaying an image on a screen, comprising: a housing having a cavity in an optical axis direction of the lamp to house the lamp; An adjustment bracket having an opening opposed to a portion, the adjustment bracket being mounted on the housing, and being provided in a portion of the adjustment bracket that is a blind spot of the lamp in a plane orthogonal to the optical axis of the lamp, A first position adjustment / position fixing mechanism that adjusts a relative position between a body and the adjustment bracket, and that fixes the adjusted storage body and the adjustment bracket. Projector device. 2. The lamp is equipped with a heat sink.
2. The first position adjustment / position fixing mechanism is provided outside the heat sink.
The projector device according to any one of the preceding claims. 3. A first housing for housing the lamp, wherein the housing is a first housing for storing the lamp.
, And a second storage body for storing the first storage body, wherein the first position adjustment / position fixing mechanism is configured to move the adjustment bracket and the first storage body relative to each other. 3. The projector device according to claim 1, wherein the position is determined. 4. A second position adjusting / fixing device for adjusting a relative position between the second storage body and the adjustment bracket and fixing the adjusted second storage body and the adjustment bracket. 4. The apparatus according to claim 3, further comprising a position fixing mechanism.
The projector device according to any one of the preceding claims. 5. The first storage body has an adjusting portion for adjusting the position of the first storage body from the outside, and the second storage body has a second position.
5. The projector device according to claim 3, wherein the storage body has an opening facing the adjustment unit. 6. 6. The projector according to claim 1, wherein the lamp is a xenon arc lamp packaged in a lamp.