JP3369944B2 - Projector device - Google Patents

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 for a lamp.

[0002]

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

In FIG. 8, the light emitted from the lamp 1 is condensed by the condenser lenses 2 and 3 and is incident on the cold mirror 4. The light reflected by the cold mirror 4 is incident on 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.

The blue (B) / green (G) light is reflected by the color separation mirror 5 and enters the color separation mirror 7. Of the light entering the color separation mirror 7, G light is reflected by the color separation mirror 7 and enters the liquid crystal panel 13. Of the light incident on the color separation mirror 7, the B light is passed through the relay lens 8, the mirror 9, the relay lens 10, and the mirror 11 to adjust the optical path length of the R light and the G light to the liquid crystal panel 14. Is incident on.

As is well known, the liquid crystal panels 12 to 14 are supplied with R, G, and R to which a voltage corresponding to an image is applied.
Each of the B lights is modulated. The lights of the respective colors output from the liquid crystal panels 12 to 14 are combined by the combining prism 15 and projected on the screen 17 by the projection lens 16. In this way, the image is displayed on the screen 17.

In the projector device configured as described above, the brightness on the screen is made brighter,
Further, in order to optimize the brightness distribution on the screen, it is necessary to accurately adjust the optical axis of the lamp 1. In this type of projector device, a lamp-packaged xenon arc lamp may be used as an example of the lamp 1. In a xenon arc lamp packaged in a lamp, it is not possible to adjust the optical axis by adjusting the arc generation part, so it is necessary to provide the lamp unit with an optical axis adjusting mechanism.

Now, the optical axis adjusting mechanism of the lamp in the conventional projector will be described. 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, front and rear portions of a xenon arc lamp 21 (hereinafter, lamp 21) corresponding to the lamp 1 in FIG. 8 are electrodes of the lamp 21 and a heat sink 22 for cooling the lamp 21. , 22 are mounted.
The heat sink 22 has an opening 22a through which the lamp 21 is inserted in the central portion, and a large number of fins 22b are radially formed. Note that FIG. 7 illustrates a state in which the heat sink 22 is removed from the lamp 21.

The lamp 21 to which the heat sink 22 is attached is 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 by slide plates 24, 24 in the front-rear direction of the optical axis. The Z axis in FIG. 5 is the optical axis of the lamp 21. Slide plate 24 has opening 2
4a, and three guide pins 24b are provided. The guide pin 24a is inserted into a horizontally long slide hole 23b provided in the lamp duct 23 to integrate them. Since the slide hole 23b is horizontally long, the lamp duct 23 is slightly larger than the slide plate 24,
It is movable in the X-axis direction in FIG.

Both outer sides of the slide plate 24 are sandwiched by fixed plates 25, 25. The fixed plate 25 has an opening 25a and a vertically long slide hole 25b. The guide pin 24b of the slide plate 24 is inserted into the slide hole 25b to integrate the two. Slide hole 2
Since 5b is vertically long, the lamp duct 23 and the slide plate 24 are movable in the Y-axis direction in FIG. Note that FIG.
The X-axis direction in the inside 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 fixed plate 25 is fixed to the lamp base 26, and the adjustment bracket 27 is fixed to the fixed plate 25. The lamp duct 23, the slide plate 24, and the fixed plate 25 are provided with a slide screw 28 (see FIG.
(Shown in FIG. 2) to be integrated. The slide screw 28 does not firmly fix the lamp duct 23, the slide plate 24, and the fixed plate 25, but they are integrated 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 structure, screw holes 27a to 27d are formed in the adjustment bracket 27.
In the screw hole 27a, a pulling screw 29a for adjusting the lamp duct 23 in the X-axis direction in FIG.
A fixing screw 29b (shown in FIG. 5) for fixing the position of the lamp duct 23 in the X-axis direction is installed in the screw hole 27b. A screw 29c (shown in FIG. 5) for pulling the lamp duct 23 in the Y-axis direction in FIG. 5 is attached to the screw hole 27c, and a screw hole 27d is attached to the screw hole 27d in the Y-axis direction. A fixing screw 29d (shown in FIG. 5) for fixing the position of is attached.

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

[0013]

In the conventional projector device described above, the adjustment bracket 27 is mounted on the outside of the lamp duct 23, and the screws 29a to 29d project to the outermost shape, so that the lamp unit is There was a problem that it became large. Further, once the lamp duct 23 is fixed by either one of the fixing screws 29b and 29d, the pulling screws 29a and 29c cannot be adjusted, and X
It was not possible to adjust the axis and Y-axis directions one by one. Therefore, there is a problem that the optical axis adjustment is not easy.

The present invention has been made in view of the above problems, and can reduce the size of the lamp unit.
An object of the present invention is to provide a projector device in which optical axis adjustment is easy.

[0015]

In order to solve the above-mentioned problems of the prior art, the present invention provides a projector device comprising a lamp (21) for emitting light for displaying an image on a screen. An accommodating body (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.
an adjustment bracket (35) having a) attached to the housing, and provided in a portion of the adjustment bracket which is a blind spot of the lamp in a plane orthogonal to the optical axis of the lamp, A first position adjusting / position fixing mechanism (35c, 37) for adjusting the relative position between the body and the adjustment bracket and fixing the adjusted storage body and the adjustment bracket. However, the container is
The first storage body (33) for storing the lamp and the first storage body (33).
And a second storage body (34) for storing the storage body of
The first position adjusting / position fixing mechanism is the adjusting bracket.
The relative position between the racket and the first container.
The present invention provides a projector device characterized by the following.

[0016]

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

1 to 4, a lamp 21 is provided in front of and behind a xenon arc lamp 21 (hereinafter, lamp 21).
And heat sinks 22, 22 for cooling the lamp 21 are attached. Heat sink 22
As described with reference to FIG. 7, the lamp has an opening 22a through which the lamp 21 is inserted and a large number of fins 22b are radially formed. 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 which is the first housing. In addition, X in FIG.
The axis, 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 accommodating the lamp 21 and the heat sink 22 is inserted into the cavity 34a of the lamp box 34 which is the second accommodating body. Lamp duct 3
As will be described later, the optical axis adjusting tool fixing claws (adjusting portions) 33b, for example, are formed on the reference numeral 3. Four windows 34b are formed in the lamp box 34 according to the number of the fixed claws 33b. When the lamp duct 33 is housed in the lamp box 34, as shown in FIG.
Faces the window 34b.

Further, an adjusting bracket 35 is attached to the front end of the lamp box 34. The adjustment bracket 35 has an opening 35a that faces the hollow portion 33a 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 fitted in the end of the hollow portion 34a of the lamp box 34. Horizontally long slide holes 34c are formed in the front ends of the upper and lower surfaces of the lamp box 34, for example, in the vicinity of four corners. Four screw holes 35b are also formed on the upper and lower surfaces of the adjustment bracket 35 according to the number of 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, the lamp box 34 accommodating the lamp duct 33 is movable in the X-axis direction in FIG.

A vertically long slide hole 35c is formed in the front surface of the adjusting bracket 35, that is, in the vicinity of, for example, four corners of the surface (X, Y plane) orthogonal to the optical axis of the lamp 21. . Four screw holes 3 are provided on the front surface (end surface) of the lamp duct 33 according to the number of 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 moved in the Y-axis direction in FIG. 1 by a slight amount with respect to the adjustment bracket 35.

As can be seen from FIGS. 2 to 4, the slide hole 35c of the adjustment bracket 35 and the screw 37 are
It is a blind spot of the lamp 21, and is also arranged at a position that is a blind spot outside the heat sink 22 which is circular as viewed from the optical axis. Therefore, the slide hole 35c and the screw 37, which are relative position adjustment / position fixing mechanisms in the Y-axis direction between the lamp duct 33 and the adjustment bracket 35, affect the light emitted from the lamp 21 and the cooling function by the heat sink 22. It is possible to reduce the size of the lamp box 34 without giving it.

Further, the slide hole 3 of the lamp box 34
4a and the screw 36 form a relative position adjustment / position fixing mechanism in the X-axis direction between the lamp box 34 and the adjustment bracket 35, and the screw 36 has a head portion slightly protruding from the lamp box 34. Therefore, the outer shape of the lamp unit can be almost regarded as the outer shape of the lamp box 34.

In such a structure, when adjusting the optical axis of the lamp 21, the fixing claw 33b of the lamp duct 33 is moved from the window 34b of the lamp box 34 by a jig (not shown) having a micrometer, for example. The lamp duct 33 is sandwiched and moved in the X-axis and Y-axis directions to adjust its position. After adjusting the optical axis of the lamp 21, screw 3
Tighten 6, 37 and 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 it 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 adjustment bracket 35 are
Since the and are only fixed, the lamp duct 33 is
Its position is adjustable in the axial direction. Further, even if the screw 37 is tightened, the lamp duct 33 and the adjustment bracket 35 are only 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 accordingly. 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, the adjustment is easy.

By the way, the configuration of the present invention described above is
It can be applied not only to the xenon arc lamp 21 but also to any other lamp. In this embodiment, the lamp 21 having the heat sink 22 mounted thereon has been described, but the heat sink 22 may not be mounted. The present invention is not limited to the present embodiment described above, and various modifications can be made without departing from the gist of the present invention.

[0028]

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

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, and the adjustment bracket and the first storage body are provided. A first position adjusting / position fixing mechanism for positioning the relative position;
If the second position adjusting / position fixing mechanism that fixes the second housing after adjustment and the adjustment bracket is provided while adjusting the relative position between the second housing and the adjustment bracket, The two axial directions can be adjusted one by one, which facilitates the optical axis adjustment.

[Brief description of drawings]

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

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

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

FIG. 4 is a cut perspective view showing an 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 showing a general configuration of a projector device.

[Explanation of symbols]

21 Xenon Arc Lamp 22 Heat Sink 33 Lamp Duct (First Storage Body) 33a Cavity 33b Fixing Claw (Adjustment) 33c Screw Hole 34 Lamp Box (Second Storage Body) 34a Cavity 34b Window 34c Sliding 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) 37 Y-axis direction fixing screw (first position adjustment / position fixing mechanism)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-204043 (JP, A) JP-A-4-131834 (JP, A) JP-A-4-114140 (JP, A) JP-A-58- 67232 (JP, A) Actual development 5-4148 (JP, U) Actual development 5-90442 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 21/00-21 / 30

Claims (5)

(57) [Claims] 1. A projector device including a lamp that emits light for displaying an image on a screen, and a housing body that has a hollow portion in the optical axis direction of the lamp to house the lamp, and the hollow body. An adjustment bracket that is attached to the housing with an opening that faces the housing, and that is provided in a portion of the adjustment bracket that is a blind spot of the lamp in a plane that is orthogonal to the optical axis of the lamp. with adjusting the relative position between the adjustment bracket and the body, constituted by a first alignment and position fixing mechanism for fixing the housing body after the adjustment and said adjustment bracket, the housing body Is a first housing for housing the lamp,
A second container for accommodating the first container, wherein the first position adjusting / position fixing mechanism includes the adjusting bracket.
The relative position between the racket and the first container.
Projector apparatus which is a shall. Wherein with adjusting the relative position between the adjustment bracket and the second housing member, a second position adjustment for securing the second housing body and after adjustment and the adjustment bracket claim 1, characterized in that it comprises a position fixing mechanism
The described projector device. 3. The first accommodating body has an adjusting portion for adjusting the position of the first accommodating body from the outside, and the second accommodating body is provided.
The projector device according to claim 1 or 2 , wherein the housing of ( 1 ) has an opening facing the adjustment section. 4. A heat sink is mounted to the lamp,
The first position adjusting / position fixing mechanism is provided outside the heat sink.
4. The projector device according to any one of 1 to 3 . Wherein said lamp, the projector device according to claim 1 which <br/> stone 4, characterized in that the lamp packaged xenon arc lamp.