JPS6367978A - Television picture projector - Google Patents

Abstract

PURPOSE:To easily position a radiator and a CRT, to equalize the quantity of a bonding agent, to stabilize a quality and to easily apply the bonding agent automatically by mounting a spacer for a tilt in the radiator and inscribing the CRT to this spacer to make the right and left of the radiator asymmetrical. CONSTITUTION:The part of the tilt (spacer 5) is disposed in the radiator 3, the sealing parts for a coolant 4 are two parts between a lens 1 and the radiator 3 and the radiator 3 and a CRT funnel part to improve the reliability in a bonding operation and simplify parts. At this time, the CRT 10 is inclined by the tilt of the spacer 5, however, by making the left side 3A of the radiator 3 and the right side 3B thereof asymmetrical in dimension, thereby, the quantity of the bonding agent of 7A, 7B can be equalized even in the CRT 10 having the gate. Further, a gap in the part, namely, the gaps between the CRT funnel part and the right and the left inner walls of the radiator 3 are equal, so that the positioning of the radiator 3 and the CRT 10 can be executed by band 6 having the same diameter in the right and the left sides.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a television image projection device that enlarges and projects images projected on three red, green, and blue cathode ray tubes (hereinafter referred to as CRT) onto a screen using a projection lens. It is related to.

Conventional technology 2 H/ Generally, in a projection television device, the red, green, and blue CRTs are liquid-cooled, and the red CRT is located on the left and right of the green CRT, and the blue CRT is tilted between the lenses. The distance of the light beam to the screen was corrected by adding . This correction structure due to tilting is applied to a liquid-cooled CRT34 as shown in Fig. 3.
Spacer 27 with a resin and metal flap in front of the spacer 27
and attach the projection lens 2 to this spacer 27.
A method of fixing 6 was used.

Problems to be Solved by the Invention However, in the conventional method, the tilted spacer 27 is attached in front of the radiator 31, and the projection lens 26 is further attached in front of it. When trying to seal the space by injecting the cooling liquid 29 into the space, it is necessary to seal at least three places, which has the disadvantage of increasing the number of man-hours and mold cost. That is, between the lens 26 and the spacer 27, between the spacer 27 and the radiator 310, and between the radiator 3
Adhesive 26° 28.3 between peno 31 and CRT 34
Requires 3. Furthermore, the large number of sealing areas is disadvantageous in terms of reliability against leakage.

The present invention solves these conventional problems, and provides a television image projection device that requires fewer sealing parts, simplifies the overall configuration, and allows easy positioning of the radiator relative to the CRT. It provides:

Means for Solving the Problems In the television image projection apparatus of the present invention, a tilted spacer is installed inside the radiator, and a CRT is installed so as to be inscribed in the spacer. The left and right sides of the radiator are shaped asymmetrically so that the gap is uniform.

Function The present invention provides the simplest liquid cooling CRT as a sealing structure for at least two locations: radiator and lens, and radiator and CRT.
RT can be configured. By forming the left and right sides of the radiator asymmetrically, it is easy to position the CRT and the radiator, the amount of adhesive applied is uniform, automation of adhesive work, and constant adhesive force increases reliability against leaks. This contributes to improvement.

EXAMPLE Hereinafter, the configuration of an example of the present invention will be explained based on FIG. In the figure, 1 is a projection lens, 2 is an adhesive for fixing the lens 1 and the radiator 3, 4 is a cooling liquid, and 6 is a spacer in the shape of a rectangular ring with a tilt. 6
is the positioning band for CRTlo and radiator 3, 7 (
7A, 7B) is an adhesive for fixing the CRTlo and the radiator 3, and 8 is the inner wall of the radiator 3 facing the funnel portion 9 of the CRTlo.

The operation of this configuration will be explained with reference to the drawings. As shown in Fig. 2, projection type television image devices generally have red CRT19, green CRT20, blue CRT2
The optical system consists of three CRTs (1) and each lens (16°, 17.18°). For example, the light emitted from a CRT 20 with a screen size of 6 pages is equidistant from the screen 22 (the distances between rays 11 and 12 are equal);
Ray 1 for red CRT19 and blue CRT21
Since the distances between rays 3 and 14 or rays 16 and 16 are anisotropic, it is necessary to correct the difference. As can be seen from the drawing in Fig. 2, the red CRT is used as this correction means.
19 and the left and right sides of the blue CRT 21 are agitated.

As shown in FIG. 1, an example of the present invention is to install this tilting part (spacer 5) inside the radiator 3,
The cooling liquid 4 is sealed in two places: between the lens 1 and the radiator 3, and between the radiator 3 and the CRT funnel, improving the reliability of the bonding work.

We are trying to simplify the parts.

At this time, the CRTlo is tilted due to the tilting of the spacer 6, but by making the dimensions of the left side 3A and right side 3B of the radiator 3 asymmetrical, even with the tilted CRTlo, the amount of adhesive on 7A and 7B can be made uniform. Furthermore, since the gap in that part, that is, the gap between the CRT funnel part and the left and right inner walls of the radiator 3, is equal, it is possible to position the radiator 3 and the CRT lo using bands 6 with the same diameter on the left and right sides. It becomes possible. This band 6 serves not only for positioning but also as a stopper to prevent the adhesives 7A and 7B from entering the coolant 4 area. In addition, band 6 is CRTlo
It is located all around the outer circumference of.

Effects of the Invention As described above, the television image projection device of the present invention simplifies the structure for providing tilting between the CRT and the lens by mounting a tilting spacer inside the radiator and inscribing the CRT in this spacer. It has become. Furthermore, by making the left and right sides of the radiator asymmetrical, it is possible to easily position the radiator and CRT, and to equalize the amount of adhesive, which is beneficial because it can stabilize quality and facilitate automation of adhesive application. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a television image projection device according to an embodiment of the present invention, FIG. 2 is a diagram of the optical system of a general projection 7-base television, and FIG. 3 is a diagram of a conventional television image projection system. FIG. 2 is a cross-sectional view of the device. 1...Projection lens, 2, 7...Adhesive, 3...Radiator, 4...Cooling liquid,
6... Spacer, 6... Positioning band, 10... Name of CRT0 agent Patent attorney Toshi Nakao and 1 other person/--- Lens 3 - Radiator 5 - Sube Joetsu-Bant 2nd figure? ? β qR Figure 3

Claims (1)

[Claims] A projection lens is attached to the front with adhesive, and there is a radiator with a built-in spacer with a tilt inside.A cathode ray tube is inscribed in the spacer, and cooling is carried out in the area surrounded by the cathode ray tube and projection lens. A television image projection device comprising a liquid-cooled cathode ray tube into which a liquid is injected and the radiator is formed asymmetrically so that the gap between the inner wall of the radiator and the funnel portion of the cathode ray tube is uniform.