JPH08138582A - Projection television receiver - Google Patents

Abstract

PURPOSE: To increase heat radiation effect at low cost by interposing coolant liquid for heat radiation in the space between the face of a cathode-ray tube and a projection lens. CONSTITUTION: Transparent liquid 3 is charged in the container 4 between a cathode ray tube 1 and a projection lens 2, and the plane 9 provided at one end of the container 4 is connected to a metallic support structure 10 excellent in heat conductivity. Hereby, the heat of the liquid container 4 can be released to the ambient air efficiently through the support structure 10, and high heat radiation capacity can be gotten. Furthermore, the heat radiation capacity can be raised by adding a heat radiation plate to the plane 9.

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 portion of a projection type image receiver for enlarging and projecting an image projected on the image receiver by using a projection lens.

[0002]

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

A conventional projection type receiver will be described below with reference to the drawings. FIG. 7 is a sectional view showing an example of the 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 is filled with the refrigerant liquid 3. The liquid container 4 is fixed to the mounting member 6 with screws at its flange portion 5. At the time of receiving an image, the temperature of the face surface of the cathode ray tube 1 becomes high. Therefore, heat is guided to the heat radiation fins of the liquid container 4 via the liquid 3 and is radiated to the ambient air. In order to further enhance the heat dissipation ability, the heat dissipation plate 7 is connected to the outside of the liquid container 4 to increase the contact area with the ambient 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 thereof with an X-ray shielding material 8 such as an iron plate for safety.

[0004]

However, in such a conventional structure, since the entire heat radiating portion is covered with the X-ray shielding material, the convection of the air around the heat radiating portion is prevented by the X-ray shielding material and the heat is generated. You will be locked inside. As a result, there is a problem in that the heat dissipation ability is significantly reduced as compared with the case without the X-ray shielding material.

On the other hand, in order to obtain a bright display image on the screen, there is a growing demand for higher output, and the amount of heat generated increases accordingly. How to increase the amount of heat radiation greatly affects the performance of the projection type receiver. Is becoming a factor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a projection type image receiver having a high heat radiation function at a low cost while maintaining the X-ray shielding function.

[0007]

In order to achieve the above object, the present invention provides a flat portion on the outer shape of a container filled with liquid in the space around the cathode ray tube, and the flat portion is made of metal or the like having good thermal conductivity. And is connected to the flat portion of the support structure.

Further, a flat portion provided on an outer shape of a container filled with a liquid in a space around the cathode ray tube and a heat radiating plate are connected to each other through a supporting structure made of metal or the like having good thermal conductivity. is there.

Further, the above structure is arranged in the vicinity of a heat dissipation hole provided in the outer casing. Further, the heat dissipation plate is arranged outside the outer casing.

Further, the cathode ray tube structure is fixed to a metal plate which also serves as a heat radiation plate, an X-ray shield, and a support structure, which is made of a metal having good thermal conductivity and X-ray shielding property.

[0011]

With the above-described structure, the present invention can have a high heat radiation function at a low cost while maintaining the X-ray shielding function.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same components as those in the conventional example are designated 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 thereof. Cathode ray tube 1
In the liquid container 4 that connects the projection lens 2 with the transparent lens 3
Is filled.

A flat portion 9 is provided at one end of the liquid container 4, and the flat portion is connected to a flat portion of a support structure 10 made of metal or the like having good thermal conductivity with 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, and thus is considerably larger than the liquid container 4 and has a large surface area to efficiently dissipate heat to ambient 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 the second embodiment of the present invention. The heat dissipation plate 7 is connected to the flat portion 9 of the liquid container 4 via the heat conductive support structure 10. The heat radiating plate 7 not only increases the contact area with the ambient air, but is also located outside the support structure 10 so that the convection of the ambient air can be fully utilized, and the heat radiation ability can be dramatically improved. it can.

FIG. 4 is a sectional view showing the main part of the third embodiment of the present invention. The heat dissipation plate 7 is arranged in the vicinity of the heat dissipation hole provided in the outer casing 11, and the convection of the air entering through the heat dissipation hole can be effectively used to enhance the heat dissipation capability.

FIG. 5 is a sectional view showing the main part of the fourth embodiment of the present invention. By disposing the heat dissipation plate 7 outside the outer casing 11, the convection of air outside the casing can be effectively used and the heat dissipation ability can be enhanced.

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

[0019]

As is apparent from the above embodiments, according to the present invention, it is possible to provide a projection type image receiver having a high heat dissipation function at low cost.

[Brief description of drawings]

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

FIG. 2 is a sectional view showing the 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 device of the present invention.

FIG. 4 is a sectional view showing an essential part of a third embodiment of the device of the present invention.

FIG. 5 is a sectional view showing an essential part of a fourth embodiment of the device of the present invention.

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

FIG. 7 is a 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 section 6 Mounting bracket 7 Radiating plate 8 X-ray shielding material 9 Flat section 10 Thermal conductive support structure 11 Outer casing 12 Cathode ray tube structure section 13 Metal fitting

Claims (5)

[Claims] 1. A container filled with a liquid is formed in a space between a face surface of a cathode ray tube and a projection lens arranged in front of the face surface, and a flat portion provided on the outer shape of the container is made of metal or the like having good thermal conductivity. A projection receiver connected to the flat portion of the support structure. 2. A container filled with a liquid is formed in a space between a face surface of a cathode ray tube and a projection lens arranged in front of the face surface, and a flat portion provided outside the container and a heat dissipation plate are made of a heat conductive material. A projection type image receiving apparatus, wherein the projection type image receiving apparatus is connected through the support structure made of a good metal or the like. 3. A projection type image receiver in which the support structure according to claim 2 is arranged near a heat dissipation hole provided in an outer casing. 4. The projection type image receiver according to claim 2, wherein the heat dissipation plate is arranged outside the outer casing. 5. A projection type image receiver in which a cathode ray tube structure is fixed to a heat dissipation plate made of metal or the like having good thermal conductivity and X-ray shielding property, a metal member that also serves as an X-ray shielding and support structure.