JP2569167Y2 - Projection display 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 projection display device, and more particularly, to a structure for storing a lamp house in a lamp case.

[0002]

2. Description of the Related Art FIG. 6 is an explanatory view showing the principle structure of this type of projection display device. In FIG. 6, reference numeral 1 denotes a lamp comprising a light source 2 and a reflecting mirror 3, 4 denotes an infrared filter,
Reference numerals 5 and 6 denote dichroic mirrors for separating green and red colors.
It is installed so that only green and red are reflected at right angles. 7a to 7c are total reflection mirrors installed so as to reflect total light in a right angle direction, and 8a to 8c are transmission type liquid crystal panels installed perpendicular to the optical axis and surrounding three sides of a dichroic prism 9 described later. , 9 is a dichroic prism for color synthesis, 10 is a projection lens, 11 is a screen, 12
Is a box having a projection port 12a and an outlet 12b, and 13 is a lamp house to which the lamp 1 is attached. 14 is a lamp case, and 26 is a design lid installed in the lamp house 13.

In the projection type display device having the above-described structure, the white light emitted from the lamp 1 is removed from the heat rays by the infrared filter 4, and then the dichroic mirror 5 for separating green light.
Then, the green light is reflected in the right angle direction, the red light and the green light are transmitted, and the reflected green light is reflected again in the right angle direction by the total reflection mirror 7c to irradiate the transmission type liquid crystal panel 8c. The red light is reflected at right angles by the dichroic mirror 6 for red separation and irradiates the transmissive liquid crystal panel 8b. Further, the blue light transmitted through the dichroic mirrors 5 and 6 is totally reflected by mirrors 7a and 7b.
Irradiates the transmissive liquid crystal panel 8a after being reflected in the directions at right angles. Now, images corresponding to the respective colors are displayed on the transmissive liquid crystal panels 8a to 8c illuminated with three colors of green, red, and blue. The image is synthesized as a color image by the dichroic prism 9 for use, and is enlarged and projected by the projection lens 10 to project an image on the screen 11.

[0004] By the way, the structure of the housing portion of the lamp house 13 in the lamp case 14 in such a projection display device has conventionally been configured as shown in, for example, JP-A-1-302387. 7 is an exploded perspective view showing the conventional structure, FIG. 8 is a transverse sectional view thereof, and FIG. 9 is a longitudinal sectional view thereof.

[0007] In FIGS. 7 to 9, reference numeral 15 denotes a lamp house 1.
3 is a front plate, 16 is a front plate, 17 is a rear plate, and 18 is a screw. The lamp house 13 is formed by fixing the front plate 16 and the rear plate 17 to the side plate 15 with screws 18. Further, reference numeral 19 denotes a shaft crimped to a predetermined position of the front plate 16, reference numeral 20 denotes a bush with a flange portion 20a inserted into the shaft 19, reference numeral 21 denotes a compression spring,
Reference numeral 2 denotes a washer, and 23 denotes a screw. After the opening edge 3a of the reflecting mirror 3 is suppressed by the flange 20a of the bush 20, the flange 20a is crimped with the screw 23 via the compression spring 21 and the washer 22. Lamp 1 on front plate 16
Is installed. When the lamp house 13 is housed in the lamp case 14, the electrical connection is made between the male connector 25a attached to the lamp house 13 and the lamp.
This is performed by the female connector 25b attached to the case 14.

Next, the operation of the above configuration will be described. Lamp 1 which is a luminous body for projecting a color image
Is a consumable and must be easily replaceable. Therefore, the lamp house 13 is a unit detachable from the box body 12, and the lamp 1 can be removed from the lamp house 13 by removing the screws 18 and 23. It is possible. When the lamp house 13 is installed at a predetermined position of the box 12, the maximum outer dimension (L
Comprises an inner wall 1) slightly greater than the dimension L2 (L2> L1), by inserting the lamp case 14 fixed to the box body 12, and is like are housed installed.

[0007]

Since the structure of the housing of the lamp house in the lamp case in the conventional projection display device is configured as described above, the maximum external dimension (L1) of the lamp house 13 is 13 is the head 18a of the screw 18 that is assembling the lamp case 14, and the lamp case 14 must be sized to escape this screw head 18a.
Dimensions vary depending on the method of assembly.
8a is caught on the inner wall of the lamp case 14, and even if it is stored, the lamp house 13 is loose.

The present invention has been made to solve the above-mentioned problems, and it is intended to obtain a good storage property without rattling by fitting an outer wall of a lamp house and an inner wall of a lamp case without a gap. It is an object of the present invention to provide a projection display device capable of performing the following.

[0009]

According to the projection type display device of the present invention , a space is formed at a corner of a lamp house housed in a lamp case, and a space other than the space is formed.
Abutment part that can slide the outer wall of the center part of the lamp with the inner wall of the lamp case
And fix the above-mentioned space part to the constituent members of the lamp house.
And a screwing portion for the

In particular, the space at the corner of the lamp house is
Tilt to the contact part that can slide on the inner wall of the lamp case
It is preferable to be constituted by a side plate forming an inclined surface .

[0011]

According to this invention, the contact portion formed in the lamp house is slidably brought into contact with the inner wall of the lamp case to be housed, so that the lamp house is fitted to the inner wall of the lamp case with high accuracy, and the rattle is provided. The lamp house can be housed in the lamp case without causing any trouble.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a structure of a housing of a lamp house in a lamp case in a projection display device according to an embodiment of the present invention, FIG. 2 is a transverse sectional view thereof, and FIG. In the figure, the same or corresponding parts as those in the conventional example shown in FIGS. 7 to 9 are denoted by the same reference numerals, and description thereof will be omitted.

In FIGS. 1 to 3, 15a and 15a are inclined surfaces formed on both upper and lower corners of a side plate 15 constituting the lamp house 13, and 15b is both inclined surfaces 15 of the side plate 15.
a, abutting portion of the lamp case 14 left as a flat surface between the lamp housing 13 and the four corners between the outer wall of the lamp house 13 and the inner wall of the lamp case 14 by the inclined surfaces 15a, 15a. A portion 27 is formed;
Each of the space portions 27 serves as an installation portion of a screw 18 for assembling and fixing the lamp house 13.

Next, the operation of the above configuration will be described. The white light emitted from the lamp 1 is separated into three primary colors of green, red and blue, and the transmissive liquid crystal panels 8a to 8 corresponding to each color are separated.
The principle of light- modulating the image displayed on c and then color-combining again and enlarging and projecting it as a color image on the screen 11 by the projection lens 10 is the same as that described in the conventional example.

By the way, since the lamp 1 housed in the lamp house 13 is a consumable item, it must be easily replaced. Therefore, the lamp house 13 is detachable from the box body 12, and the screws 1
Can be removed from the lamp house 13, and when the lamp house 13 is installed at a predetermined position of the box body 12, an inner wall having a size slightly larger than the outer dimension of the lamp house 13 is provided. It is stored and installed by inserting it into a lamp case 14 fixed to 12.

At the position of the inclined surface 15a formed on the side plate 15 of the lamp house 13, the front plate 16 and the rear plate 17 are located.
The flat surface of the side plate 15 serves as a contact portion 15b with the lamp case 14. Therefore,
The inner wall of the lamp case 14 may be slightly larger than the contact portion 15b of the side plate 15, there is no dimensional variation at the time of assembly, and the outer wall of the lamp house 13 and the inner wall of the lamp case 14 come into contact with each other over a wide range. Lamp case 1
4 can be stored without backlash.

In the above-described embodiment, a description has been given of a configuration in which the screwing position of the front plate 16 and the rear plate 17 with respect to the side plate 15 is performed by the inclined surface 15a provided on the side plate 15, as shown in FIG. As described above, the concave corners 15c, 15c are provided at each corner of the side plate 15, and these concave corners 15c, 15c,
At 15c, the lamp house 13 may be assembled and fixed via the screw 18.

As shown in FIG. 5, the side plate 15 is provided with outer edges 15d, 15d whose outer dimensions are larger than the heads of the screws 18 for attaching the front plate 16 and the rear plate 17, and these outer edges 15d, 15d may be used as the structure for fitting with the inner wall of the lamp case 1 4.

Further, in the above-described embodiment, the projection type display device in which the color is separated by the dichroic mirror and the color is synthesized by the dichroic prism using three transmissive liquid crystal panels has been described, but this is a dichroic mirror for the color synthesis. And a projection display device using one color liquid crystal panel without performing color separation / combination has the same effect as the above embodiment. .

[0020]

[Effect of the invention] As described above, according to the invention, a part of the outer wall of the lamp house is used as a contact portion with the lamp case,
When the lamp house is housed, so as to sliding contact with the abutment on the inner wall of the lamp case, the other corners of the
Since the screws for assembling and fixing the members that make up the lamp house are arranged in the space formed in the lamp housing, the lamp house is not affected by the screw head and unaffected by the variation in assembling the lamp house. Can be fitted to the inner wall of the lamp case in a sufficiently wide range, so that there is an effect that it is possible to eliminate looseness during storage and to store the lamp well.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a structure of a storage unit in a lamp case of a lamp house of a projection display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a longitudinal sectional view of FIG.

FIG. 4 is a longitudinal sectional view of a main part showing another embodiment according to the present invention.

FIG. 5 is a longitudinal sectional view of a main part showing another embodiment according to the present invention.

FIG. 6 is an explanatory diagram showing a basic configuration of a normal projection display device.

FIG. 7 is an exploded perspective view showing a structure of a housing portion of a lamp house in a lamp case in a conventional projection display device.

8 is a cross-sectional view of FIG.

FIG. 9 is a longitudinal sectional view of FIG. 7;

[Explanation of symbols]

 2 light source 8 transmissive liquid crystal panel 10 projection lens 11 screen 12 box 13 lamp house 14 lamp case 15 side plate 15a inclined surface 15b contact part

Claims (2)

(57) [Scope of request for utility model registration] 1. A transmissive liquid crystal panel and a light source disposed behind the liquid crystal panel and illuminating the panel from behind are housed therein, and a display image of the liquid crystal panel is enlarged and projected on a screen at a front portion. In a projection display device including a projection lens, a lamp case disposed at a predetermined position inside, and a lamp house to which a lamp including the light source and the reflecting mirror is attached and detachably housed in the lamp case. A space is formed at the corner of the lamp house , and the space is formed
The outer wall of the central part other than the
The space is fixed to the lamp house components.
A projection-type display device, wherein the projection-type display device has a screwing portion for performing the operation. 2. The corner space of the lamp house has an upper part.
Slant to the contact part that can slide on the inner wall of the lamp case
2. The projection type display device according to claim 1 , wherein the projection type display device is constituted by a side plate forming a surface .