JPH0354466Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a display device equipped with a flat cathode ray tube that can display input signal information as an image, and is particularly useful as a small monitor television. This invention relates to display devices.

[Conventional technology]

Some conventional display devices use a liquid crystal or a flat cathode ray tube as a display section in order to reduce the thickness of the display device.

While those using liquid crystals have problems with contrast and are limited in their range of use, flat cathode ray tubes are superior in that they provide sufficient brightness and high resolution.

[Problems to be Solved by the Invention] However, a display device using a flat cathode ray tube requires a deflection yoke for scanning an electron beam, and there is a problem in terms of making it thinner and smaller.

In other words, when downsizing a display device, a deflection yoke is attached to the neck of a flat cathode ray tube, and a printed circuit board with printed wiring for operating the flat cathode ray tube is placed above and below the deflection yoke. is attached to the frame. Therefore, there is a problem in that the overall thickness of the display device is restricted by the thickness of the deflection yoke and the printed circuit boards disposed above and below the deflection yoke.

This invention was made to solve the above-mentioned problems, and provides a display device using a flat cathode ray tube that allows the entire display device to be made thinner and smaller.

[Means for solving problems]

Fig. 1 is an external perspective view of the main parts of an embodiment of this invention with the panel removed, Fig. 2 is a side view thereof, and Fig. 3 is an exploded perspective view with the frame and supports removed. .

In these figures, reference numeral 1 denotes a rectangular metal frame with open front and rear surfaces, and a locking piece 1A is provided at the upper part of the front surface, and mounting pieces 1B are provided at predetermined locations. The rear surface is slightly occluded by an inwardly sloping section. Although not shown, a required number of mounting pieces 1B are provided on the rear side as well.

2 is a screen 2 housed within the frame 1;
This is a flat type cathode ray tube (hereinafter referred to as CRT) in which A and an electron gun 2B are almost parallel to each other, and a deflection yoke 3 for scanning the electron beam is provided at its neck portion 2C, A socket (printed circuit board) 4 is attached to the section. Note that 2D is a funnel portion.

5 is the rear surface of the frame 1, that is, the CRT 2
The main printed circuit board is arranged on the back side of the main printed circuit board, and has an opening 5A facing the deflection yoke 3, a cushion 6 that comes into contact with the back side of the CRT 2, a connector 7A, a jack 7B for input, a volume 7C for brightness and brightness adjustment, and Electronic components such as switch 7D are mounted. Then, if necessary, a printed circuit board 8 having, for example, a deflection correction circuit is attached.

Reference numeral 9 denotes a sub-printed circuit board, which is attached to the lower part of the front surface of the frame 1, that is, near the neck portion 2C and funnel portion 2D of the CRT 2, and has a notch 9A through which the deflection yoke 3 faces. and,
A flyback transformer 1 is installed on the sub printed circuit board 9.
0, the electronic components of the deflection circuit system are installed,
A connector 11 connected to the CRT 2 is connected.

Note that illustrations of other electronic components mounted on the main and sub printed circuit boards 5, 9, etc. are omitted.

Reference numeral 12 denotes a metal support that is attached to the front side of the frame 1, and a rubber bushing (not shown) that comes into pressure contact with the CRT 2 is attached to the back side.

[Effect]

Next, the assembly of the display device of this invention will be explained.

First, the main printed circuit board 5 with electronic components attached is attached to the rear surface of the frame 1. Note that portions of the frame 1 corresponding to the connector 7A, jack 7B, volume 7C, and switch 7D are cut out so that they face the outside.

Then, when the CRT 2 is housed in the frame 1 and the upper part of the CRT 2 is brought into contact with the upper part of the frame 1 and the locking piece 1A, the deflection yoke 3 is moved into the opening 5.
Facing point A, the rear surface of CRT2 contacts cushion 6.

Next, when the support column 12 is attached to the front of the frame 1, the rubber bushing comes into pressure contact with the CRT 2, so
The CRT 2 is positioned and attached within the frame 1. Then, when the connector 11 is connected to the CRT 2 and the sub-printed circuit board 9 is attached to the front of the frame 1, the deflection yoke 3 is inserted into the notch 9A.
It can be assembled as shown in Figures 1 and 2. In addition, when each component is attached to the frame 1 as mentioned above, it is attached using the screw and attachment piece 1B which are omitted from illustration. A decorative panel (not shown) is placed outside the state shown in Figures 1 and 2.
can be installed.

When the display device of this invention is assembled as described above, the deflection yoke 3 provided on the CRT 2 faces the opening 5A and notch 9A of the main and sub printed circuit boards 5 and 9, It can be made thinner by the thickness of the printed circuit boards 5 and 9. Therefore, the entire display device can be made thin and compact.

Further, if a part of the deflection yoke 3 protrudes beyond the main and sub-printed boards 5 and 9, if the corresponding parts of the panel are made into recesses, the deflection yoke 3 will not come into pressure contact with the panel.

When the display device of this invention supplies power and an input signal to be displayed from the connector 7A,
Since information can be displayed on the screen 2A of the CRT2, it goes without saying that if a television signal is input, it can be used as a television receiver.
Since it can be used as a monitor by inputting a TV camera signal, it can be used as a videophone, doorbell, etc. It can also be incorporated into a car's dashboard to input and display various information such as speed, remaining fuel level, engine speed, oil pressure, and coolant temperature.

〔Example〕

FIG. 4 is a partial view showing another example of attaching a sub-printed board, and the same parts as in FIGS. 1 to 3 are given the same reference numerals.

In this figure, reference numeral 13 denotes a sub-printed board, which is provided with a cutout 13A on the top of which the deflection yoke 3 faces, and a pair of openings 13B.

Reference numeral 14 denotes a metal support column, and an L-shaped mounting portion 14A is provided on the back side.

15 is a synthetic resin hinge, one end is CRT2
It is fixed to the mounting portion 14A with a rubber bushing 16 that comes into pressure contact with the auxiliary printed circuit board 13, and an engaging portion 15A that enters the opening 13B and locks one end of the sub-printed circuit board 13 is provided at the other end.

As shown in FIG. 4, when the upper part of the secondary printed circuit board 13 is attached to the hinge 15 and the lower part is fixed to the frame 1 with screws or hooks (not shown), the secondary printed circuit board 13 can be attached to the hinge by removing the screws or hooks. It can be rotated around 15. Therefore, replacement and adjustment of electronic components can be performed with good workability without removing the sub-printed circuit board 13.

[Effect of idea]

As explained above, the display device using the flat cathode ray tube of this invention has an opening or notch through which the deflection yoke faces in the main and sub-printed circuit boards placed above and below the deflection yoke. The yoke faces the openings and notches of the main and sub-printed boards, and the thickness of these parts can be made thinner by the thickness of the main and sub-printed boards. Therefore, there is an advantage that the entire display device can be made thinner and smaller.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of the main parts of an embodiment of this invention with the panel removed, Fig. 2 is a side view thereof, Fig. 3 is an exploded perspective view with the frame and supports removed; FIG. 4 is a partial view showing another example of attaching a sub-printed board. In the figure, 1 is a frame, 2 is a flat cathode ray tube (CRT), 2C is a neck part, 2D is a funnel part,
3 is a deflection yoke, 5 is a main printed board, 5A is an opening, 9 is a sub printed board, and 9A is a notch.

Claims (1)

[Scope of utility model registration request] A rectangular frame with open front and rear surfaces, a flat cathode ray tube housed within the frame, and a main printed circuit board disposed on the back of the flat cathode ray tube having an opening through which a deflection yoke provided on the flat cathode ray tube faces. . A display device using a flat cathode ray tube, characterized in that the display device comprises a sub printed circuit board disposed near a neck portion or a funnel portion on the front surface of the flat cathode ray tube having a notch through which the deflection yoke faces.