JPS6035329Y2 - television receiver - Google Patents

Description

[Detailed description of the invention] This invention relates to a television receiver. By making a part of the front mask movable, a single television receiver can display images of different sizes, mainly in the vertical direction. This makes it possible to easily handle videos of different lengths.

Currently, 10 horizontal scanning lines are required for the current television system.
A so-called high-definition television receiver is being considered, which is capable of displaying more than 0.00 TVs.

If you try to project this image onto the cathode ray tube of a current television receiver and adjust the horizontal dimensions to match the current image, the screen will be shrunken in the vertical direction, and the top and bottom of the cathode ray tube will be a black screen. Therefore, there is a problem that it is difficult to see as it is.

In view of the above points, the present invention covers a part of the screen of the cathode ray tube in accordance with the size of the image to make it easier to see, especially when the image is compressed in the vertical direction.

One embodiment will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, movable plates 3 and 4 are provided at the upper and lower portions between the mask 1 and the cathode ray tube 2 so as to be movable up and down.

For this purpose, as shown in FIG. 3, guides 5, 6, and 7°8 are provided at the positions of the mask 1 corresponding to the four corners of the cathode ray tube 2, that is, at the four corners of the opening corresponding to the cathode ray tube 2, and one movable plate 3 is movable up and down along guides 5, 6, and the other movable plate 4 is movable up and down along guides 7.8, and springs are installed so that it is close to each guide 5, 6, 7, 8. The body 9°10, 11, 12 is fixed to the mask 1.

The spring bodies 9 to 12 have wavy portions such that the wavy portions of the spring bodies 9 and 10 and the wavy portions of the spring bodies 11 and 12 face each other.

On the other hand, the movable plate 3゜4 itself is integrally provided with semicircular positioning protrusions 13, 14, 15, 16 at a pair of opposing corners, which are connected to the spring bodies 9, 10, 11, 12.
The movable plates 3 and 4 are positioned by fitting into two recesses, respectively.

FIG. 4 is a diagram for explaining the function and effect of the present invention, in which the movable plate 4 located at the position of the solid line is moved by the knob 18 integrated with the movable plate 4.
By holding the movable plate 4 and pulling it up in the direction of the arrow, the movable plate 4 is moved and positioned at the position shown by the two-dot chain line.

Therefore, by moving the movable plate 3.4 in the vertical direction according to the size of the image, the viewer can see only the portion of the image and can obtain a natural feeling.

Here, 17 indicates a knob of the movable plate 3.

In addition, in the above embodiment, the case where the movable plate is movable up and down has been explained, but it can also be configured to be movable in the left and right directions based on the same concept, and in the above embodiment, two stages of movement have been explained. , 3 more steps,
It is also easy to move in four stages.

Further, it may be configured to be continuously movable.

As explained above, according to the present invention, by using a pair of movable movable plates, the size of the mask can be changed to correspond to the size of the image, and an easy-to-see screen can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a television receiver according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a schematic configuration of the same receiver.
Figure 3 is a cutaway perspective view showing the configuration of the receiver in detail;
The figure is a diagram for explaining the effects of the present invention. 1... Mask, 2... Braun tube, 3
, 4...Movable plate, 5, 6, 7.8...
Guide, 9.10°11.12...Spring body, 1
3. 14. 15. 16...protrusion, 17.
18...knobs.

Claims (1)

[Scope of utility model registration request] At least a pair of movable plates are movably provided on a mask having an opening corresponding to the screen of the cathode ray tube, and the movable plates are moved to cover a part of the cathode ray tube depending on the size of the image projected on the cathode ray tube. , a television receiver that becomes uncovered.