JPS58106979A - Projection type television receiver - Google Patents

Abstract

PURPOSE:To change the projection distance of a picture with a simple operation, by attaching freely movably CRTs and lenses, which are placed on both sides of the center CRT and the center lens respectively, out of three CRTs and lenses so that relative angles of these CRTs and lenses to the center CRT and the center lens are adjusted. CONSTITUTION:CRTs 3R, 3G, and 3B and lenses 4R, 4G, and 4B are attached to samll box bodies 7R, 7G, and 7B individually, and these box bodies are attached to a common frame 8, and CRTs 3R and 3B and lenses 4R and 4B are attached freely rotatably to the frame 8. In this constitution, when screws 11R, 11B, 12R, and 12B are loosened to move and adjust vertically coupling metallic jigs 10R and 10B of separate parts, angles of box bodies 7R and 7B on both sides to the center box body 7G are changed optionally. As the result, relative angles of projection CRTs 3R and 3B and lenses 4R and 4B on both sides to center projection CRT 3G and lens 4G are changed, and thus, the projection distance is changed optionally.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projection type television receiver that projects color television images onto a screen using three sets of cathode ray tubes and lenses, and that allows the projection distance to be changed with a simple operation. This is what we are trying to provide.

Hereinafter, the present invention will be explained with reference to the drawings showing one embodiment thereof.

FIGS. 1 and 2 show the basic structure of a two-type projection television imager, which consists of a projection section 1 having red, green, and blue cathode ray tubes and lenses, and a screen 2. The projection section 1 includes three cathode ray tubes 3R, 3G, 3B and three lenses 4R, 4G.

4B and attach them to the box body 5 using the metal fittings 6.
= F is kicked. The projection light emitted from the cathode ray tubes 3R93G and 3B passes through lenses 4R, 40, and 4B, and is projected onto the projection unit 1.
Lenses 4R, 4G, 4B and cathode ray tubes 3R, 3G are arranged so that they coincide with each other at the position of the screen 2 which is further away from the camera. 3
B are placed side by side and display the television image on screen 2.
Project the image onto the screen.

In this case, the box body 5 is made of a combination of Guicast and iron plates as shown in the figure, and each cathode ray tube 3rt
, 3G, 3B and lenses 4R, 4G.

A phase with 4B! If the L position is fixed, L will be constant.

If it is desired to change the projection distance, the box body 6 must be remade.

Therefore, the present device is designed to allow the projection portion PtIL to be arbitrarily changed in such a projection type television receiver by an additional operation.

Figure 3 is a top view of a device that allows the projection distance to be changed, Figure 4 is a perspective view of one of the cathode ray tubes and a lens, and Figure 5 is a sectional view of its main parts. .

Each lens is 4G.

4B and cathode ray tubes 3R, 3G, and 3B are individually placed in small boxes 7.
Installed on R, 7G, 7B, their boxes R97G, 7
Two sets of cathode ray tubes 3R are located at both ends of the three sets.

3B and lenses 4R, 4B and lenses 4R, 4B are rotatably locked to frame 8 by fulcrums 9R, 9B, respectively.

The boxes 71.7G and 7B are made of separate fittings 10R and 11B and screws 11R, 11B and 12R, as shown in Fig. 4.
, 12B to the frame 8.

With this configuration, the screws 11R, 11B, 12R
.

By loosening 12B and vertically moving and adjusting the coupling fittings 10R and 10B, which are separate parts, the angle of the box body R17B on both sides with respect to the center box body 7G can be arbitrarily changed.

As a result, the projection cathode ray tubes 3R, 3B and lenses 4R, 4 on both sides are
The relative angle of B can be changed, thereby changing the projection distance to σ.

As described above, the projection television receiver of the present invention has the great advantage that the projection distance can be changed with a simple operation, and the projector and screen can be arranged according to the size of the installation space. are doing.

Note that the present invention may be used not only for the two-body projection television receiver as described above, but also for an integrated television receiver in which the screen and the projection section are integrated, and in that case, the projection distance due to manufacturing errors may vary. This has the advantage of being able to correct variations, etc., to a constant level through adjustment.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the basic configuration of a projection television receiver, FIG. 2 is a cross-sectional plan view thereof, and FIG. 3 is a plan view of essential parts of a projection television receiver according to an embodiment of the present invention. ,
FIG. 4 is a perspective view of a part thereof. FIG. 5 is a sectional plan view of a part thereof. 1...Projection section, 2...Screen, 3
R, 3G. 3B... Yin W-ray tube > 4 R, 4G, 4
B... River lens, 7B, γG, γB... Box, 8... Frame, 9R, 9B... Fulcrum, j
OR, 10B...Connection fittings, 11FI. 11B, 12R, 12B... instep screws. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure J Figure 3 Figure JBgBtt Figure 4 Figure 5

Claims (1)

[Claims] Three sets of projection cathode ray tubes and lenses that respectively project red, green, and blue television images onto the screen are arranged side by side, and of the three sets of projection cathode ray tubes and lenses, those located on both sides are placed in the center. 1. A projection type television receiver characterized in that it is movably mounted in a hanging manner by adjusting the relative angle with respect to the object located in the area.