JP2002202730A - Rear cover for display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear cover for display which efficiently shields electromagnetic waves and has superior workability. SOLUTION: The rear cover 100 for display is used to be fitted to the back side of a case frame armoring an internal unit, such as a plasma display panel, and is formed by subjecting a metal plate of a rectangular shape to pressing into a desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover for a display having an electromagnetic wave shielding performance and excellent workability.

[0002]

2. Description of the Related Art A display has a flat screen, thinner,
Plasma displays and liquid crystal displays have been attracting attention as the mainstream of next-generation displays because they have been developed with the trend toward larger sizes and higher image quality. A plasma display is a space sealed with two glass substrates and walls and filled with a rare gas, causing a discharge between the electrodes mounted above and below, stimulating RGB phosphors by emitting ultraviolet light, and causing visible light. A large-screen, thin, and lightweight display using a plasma display panel that emits light. On the other hand, a liquid crystal display is a liquid crystal display using amorphous silicon or polysilicon, and is a thin, completely flat, power-saving display.

Since a large amount of electromagnetic waves are generated from an internal unit such as a plasma display panel used in a plasma display, it is necessary to avoid emission of electromagnetic waves from a screen or the like to a human body in consideration of the effect on the human body. Usually, a display screen is provided with a highly transparent electromagnetic wave shielding plate. Naturally, in the case of a plasma display, a material that shields electromagnetic waves is also used. However, these materials prevent the emission of electromagnetic waves from the inside and prevent electromagnetic waves generated outside such as other home appliances from being generated by the plasma display. It also has the significance of preventing interference with the internal units of the device. This also requires the ability to block external electromagnetic waves in the case of a liquid crystal display.

[0004] As shown in FIG. 4, a conventional plasma display 1 includes an internal unit 2 such as a plasma display.
And a case frame 3 and a rear cover 4 that externally cover the internal unit 2. The plasma display case has a rear cover 4 fixed to the rear surface of the case frame 3. The rear cover 4 is formed by pressing an aluminum plate having a thickness of about 1 mm into a desired shape. In addition, by the press working, the internal unit 2 is formed into a shape suitable for attachment and ventilation for heat radiation.

[0005]

However, although the aluminum plate used as the material of the rear cover 4 is a lightweight material that efficiently shields electromagnetic waves, it takes time and effort to press-process the rear cover 4. Therefore, work efficiency is not good. Also, since the aluminum plate has a low drawing ratio, when the drawing depth is increased, the corner A
(FIG. 4) may be torn or cracked, or the surface of the stretched portion may lose its smoothness.

The present invention has been made in view of the above problems, and has as its object to provide a display rear cover that shields electromagnetic waves and has excellent workability.

[0007]

According to a first aspect of the present invention, there is provided a display rear cover, which is a metal rear cover used for a display case, wherein at least one of an iron plate is provided. It is made of a metal plate whose surface is coated with aluminum or zinc. Thereby, the rear cover for display has both the press workability by the iron plate and the shielding property of the electromagnetic wave by aluminum or zinc.

A display rear cover according to a second aspect of the present invention is a metal rear cover used for a display case, and is made of an alloy of iron and aluminum or zinc.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings. The display rear cover 100 is attached to the back side of a case frame that covers an internal unit such as a plasma display panel or a liquid crystal panel. As shown in FIG. 1, a rectangular metal plate is pressed into a desired shape. It is processed.

As shown in FIG. 2, an aluminum film 10 is formed on both sides of an iron plate 101 having a thickness of about 0.4 mm.
2 with a three-layer structure, about 50 cm long x about 1 horizontal
It has a size of 00 cm. The metal plate is pressed into the shape shown in FIG. 1 to obtain a display rear cover 100.

The pressing process mainly includes a punching process and a drawing process. In the punching process, the mounting holes 10 for fixing the display rear cover 100 to the case frame, fixing the internal unit and the like, and radiating the internal unit and the like are provided. A vent hole 11 is formed, and a rectangular tube-shaped convex portion 12 projecting outward by about 5 to 6 cm is formed by drawing.

The ventilation holes 11 are provided in parallel with each other at predetermined intervals as shown in FIG. 3 within a range surrounded by a dashed line in FIG. 1, and a hole having a diameter of 3.5 mm is 3 to 5 mm.
At intervals, the required number is provided. The diameter and interval of the ventilation holes 11 are not particularly limited, but ventilation for cooling heat generated in the internal unit of the display can be performed, and noise such as electromagnetic waves generated outside does not pass. Set as follows.

As described above, according to the rear cover 100 for a display according to the present embodiment, the iron plate 101 is used as a substrate, and a metal plate obtained by fusing the aluminum film 102 to both surfaces of the iron plate 101 is punched and drawn. Because of the excellent press workability of the iron plate 101, the corners of the convex portion 12 formed by drawing are not broken or cracked, and can be easily formed into a desired shape and formed. In addition, the rear cover 100 for a display has an excellent electromagnetic wave shielding property by the aluminum film 102.

The method of coating both surfaces of the iron plate 101 with aluminum is not limited to the above-described fusion of the aluminum film 102, but may be another method such as plating or vapor deposition. However, in the method of coating both surfaces of the iron plate 101 with aluminum by plating, it is difficult to control the thickness of the aluminum coating, and in the method of coating aluminum after punching and drawing, it takes time and a high defect rate. Therefore, as described above, the method of fusing the aluminum film 102 is preferable from the viewpoint of thickness control and work efficiency. Further, the coating of aluminum does not necessarily have to be performed on both surfaces of the iron plate, and may be performed on only one surface.

The outer surface of the display rear cover 100 may be printed on the aluminum film 102. This prevents the display rear cover 100 from being damaged during transportation or the like, thereby maintaining a good appearance.

In place of the aluminum film 102, a rectangular metal plate formed by coating a zinc coating film on both surfaces of the iron plate 101 is pressed into a desired shape, similarly to the rear cover 100 for a display. In addition, it is possible to realize a display rear cover having excellent press workability of the iron plate 101 and excellent electromagnetic wave shielding properties by the zinc film.

Further, the iron plate 101 is made of an aluminum film 102.
In place of the metal plate covered with, a rectangular metal plate made of an alloy of iron and aluminum or zinc is used, and the metal plate is pressed to form a rear cover for a display. The effect can be achieved. In the alloy, the ratio between iron and aluminum or zinc is set in consideration of the drawing ratio required for press working and the shielding performance of electromagnetic waves.

[0018]

As described above, according to the present invention,
Since the metal rear cover used for the display case is made of a metal plate in which at least one surface of an iron plate is coated with aluminum or zinc, the work of forming the rear cover becomes easy, and the metal cover is broken by the metal plate during drawing. No cracking occurs. Thereby, it is possible to realize a display rear cover that blocks electromagnetic waves and has excellent workability.

Also, according to the present invention, the metal rear cover used for the display case is made of an aluminum alloy or a zinc alloy. An excellent rear cover for a display can be realized.

[Brief description of the drawings]

FIG. 1 is a front view and a rear view showing a configuration of a display rear cover 100 according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a cross-sectional configuration of a display rear cover 100.

FIG. 3 is a front view showing a ventilation hole 11;

FIG. 4 is a schematic perspective view showing a conventional display 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma display 100 Rear cover for display 101 Iron plate 102 Aluminum film 2 Internal unit 3 Case frame 4 Rear cover

Claims (2)

[Claims] 1. A display rear cover used for a display case, comprising a metal plate having at least one surface of an iron plate coated with aluminum or zinc. 2. A rear cover made of metal for use in a display case, the rear cover being made of an alloy of iron and aluminum or zinc.