JP3161250B2 - Projection receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiation structure and a support structure for a cathode ray tube of a projection type image receiving apparatus for enlarging and projecting an image projected on the image receiving apparatus using a projection lens.

[0002]

2. Description of the Related Art In recent years, in a projection type receiver, for the purpose of cooling or improving contrast in a projection screen,
It has become mainstream to use a technique of filling a transparent liquid between a cathode ray tube and a projection lens.

Hereinafter, a conventional projection type receiver will be described with reference to the drawings. FIG. 7 is a sectional view showing an example of a configuration of a conventional projection type receiver. A liquid container 4 is formed between the cathode ray tube 1 and the projection lens 2, and the liquid container 4 is filled therein. The liquid container 4 is screwed and fixed to a fitting 6 at its flange portion 5. At the time of image reception, the temperature of the face surface of the cathode ray tube 1 becomes high, so that heat is guided to the heat radiation fins of the liquid container 4 via the liquid 3 and released to the surrounding air. In order to further enhance the heat radiation capability, a heat radiation plate 7 is connected to the outside of the liquid container 4 to increase the contact area with the surrounding air. (Application No. 4-85210) On the other hand, since the cathode ray tube 1 may generate X-rays, it is generally required to cover the periphery with an X-ray shielding member 8 such as an iron plate for safety.

[0004]

However, in such a conventional configuration, since the entire heat radiating portion is covered with the X-ray shielding material, convection of the surrounding air around the heat radiating portion is hindered by the X-ray shielding material, and the heat is prevented. It will stay inside. As a result, there is a problem that the heat radiation ability is significantly reduced as compared with the case where there is no X-ray shielding material.

On the other hand, in order to obtain a bright display image on a screen, the demand for higher output has increased, and the amount of heat generation has increased accordingly. How to increase the amount of heat dissipation is a major factor affecting the performance of a projection type receiver. It is becoming a factor.

An object of the present invention is to solve the above-mentioned problems and to provide an inexpensive projection type receiver having a high heat radiation function while maintaining an X-ray shielding function.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cathode ray tube having a face surface and a front surface thereof.
To fill the space formed by the projected projection lens with liquid
And at least two surfaces in contact with the vessel and the container
X-ray shield made of metal with good thermal conductivity enclosing the container
A support structure formed as a part;
A radiator plate provided on at least one surface, wherein the radiator plate
Near the heat radiation hole provided in the outer casing of the projection type receiver, or
It is arranged to extend outside the outer casing
is there.

In addition, a flat portion provided on an outer shape of a container filled with a liquid in a space around a cathode ray tube and a heat radiating plate are connected via a supporting structure made of a metal having good heat conductivity. is there.

Further, the above structure is arranged near a heat radiating hole provided in an outer casing. Further, the heat radiating plate is arranged outside the outer casing.

Further, the cathode ray tube structure is fixed to a heat radiating plate made of metal or the like having good heat conductivity and X-ray shielding properties, and a metal fitting which also serves as an X-ray shielding and supporting structure.

[0011]

According to the present invention, with the above-mentioned structure, it is possible to have a high heat radiation function at a low cost while maintaining the X-ray shielding function.

[0012]

1 to 6 show an embodiment of the present invention.
This will be described with reference to FIG. The same components as those of the conventional example are denoted by the same reference numerals.

FIG. 1 is a schematic view of an embodiment of the present invention. FIG. 2 is a sectional view showing the main part. Cathode ray tube 1
A transparent liquid 3 is contained in a liquid container 4 connecting the
Is filled.

A flat portion 9 is provided at one end of the liquid container 4, and the flat portion 9 is connected to a flat portion of a support structure 10 made of metal or the like having good heat conductivity by screws or the like. Since the liquid container 4 is in contact with the heat conductive support structure 10 due to the large area of the flat portion, the heat of the liquid container 4 is efficiently guided to the support structure 10. In general, the support structure 10 supports three cathode ray tube structure parts of red, green, and blue, so that the support structure 10 is considerably larger than the liquid container 4, and has a large surface area to efficiently release heat to the surrounding air. be able to.

As a result, a high heat dissipation capability can be obtained. FIG. 3 is a sectional view showing a main part of a second embodiment of the present invention. A radiator plate 7 is connected to the flat portion 9 of the liquid container 4 via a heat conductive support structure 10. The heat radiating plate 7 not only increases the contact area with the surrounding air, but also allows the convection of the surrounding air to be sufficiently utilized by being located outside the supporting structure 10, thereby dramatically improving the heat radiating ability. it can.

FIG. 4 is a sectional view showing a main part of a third embodiment of the present invention. The heat radiating plate 7 is arranged near the heat radiating hole provided in the outer casing 11, and the heat radiating ability can be enhanced by effectively utilizing the convection of the air that has entered through the heat radiating hole.

FIG. 5 is a sectional view showing a main part of a fourth embodiment of the present invention. By arranging the heat radiating plate 7 on the outside of the outer casing 11, it is possible to effectively utilize the convection of the air outside the casing and enhance the heat radiation capability.

FIG. 6 is a schematic view of a fifth embodiment of the present invention. A cathode ray tube structure 12 is fixed to a metal fitting 13 having three functions of a heat sink, an X-ray shield, and a fixing tool. The metal fitting 13 is made of an iron plate or the like having good heat conductivity and X-ray shielding properties, and has a simple structure, and is inexpensive.

[0019]

As is clear from the above embodiments, according to the present invention, it is possible to provide an inexpensive projection type receiver having a high heat radiation function.

[Brief description of the drawings]

FIG. 1 is a schematic view of a first embodiment of the apparatus of the present invention.

FIG. 2 is a sectional view showing a main part of the first embodiment of the device of the present invention.

FIG. 3 is a sectional view showing a main part of a second embodiment of the apparatus of the present invention.

FIG. 4 is a sectional view showing a main part of a third embodiment of the apparatus of the present invention.

FIG. 5 is a sectional view showing a main part of a fourth embodiment of the apparatus of the present invention.

FIG. 6 is a schematic view of a fifth embodiment of the apparatus of the present invention.

FIG. 7 is a cross-sectional view showing a main part of a conventional projection type receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cathode ray tube 2 Projection lens 3 Refrigerant liquid 4 Liquid container 5 Flange part 6 Mounting bracket 7 Heat sink 8 X-ray shielding material 9 Flat part 10 Heat conductive support structure 11 Outer housing 12 Cathode ray tube structure 13 Metal fitting

Claims (2)

(57) [Claims] 1. A liquid is filled in a space formed by a face surface of a cathode ray tube and a projection lens disposed in front of the face surface.
Contacting the container with the container on at least two sides;
An X-ray shield comprising the above-mentioned container and made of a metal having good thermal conductivity
A support structure formed as a shielding part, and
A radiator plate provided on at least one surface,
The plate is placed near the radiator hole provided in the outer casing of the projection receiver
Projection-type receiver and composed. 2. A cathode ray tube having a face surface and a front surface thereof.
Fills the space formed by the placed projection lens
Contacting the container with the container on at least two sides;
An X-ray shield comprising the above-mentioned container and made of a metal having good thermal conductivity, etc.
A support structure formed as a shielding part, and
A radiator plate provided on at least one surface,
Plate is extended outside the outer casing of the projection type receiver.
And a projection type receiver.