JP2515622Y2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a grounding structure for a small electronic device for improving receiving performance of a television or the like.

[Outline of device]

The present invention relates to an electronic device having a liquid crystal display panel and a tuner, by electrically connecting a terminal portion supplying a GND necessary for reception, a grounding material and a shielding material surrounding the panel to each other. By ensuring a sufficient GND area inside the device, it is possible to improve reception performance, make the device thinner, reduce the number of parts, improve the design, and reduce the cost.

[Conventional technology]

Conventionally, when a monopole antenna is used in an electronic device such as a television, the GN of the monopole antenna and the device is used.
The high-frequency induced voltage generated between D (for example, a metal plate) is input to the tuner. The length of this monopole antenna and the area of GND determine the reception performance of the electronic device. Naturally, how to secure this GND area was one of the important issues for making electronic devices smaller and thinner.

In the GND structure of the conventional electronic equipment, as shown in FIG. 2, a ground spring 13 is arranged between the decorative decorative plate 12 (GND) and the tuner back 1 to ensure electrical continuity.

[Problems to be solved by the invention]

However, in the GND structure of conventional electronic equipment, the decorative plate 1
Aluminum plate is often used for 2 (GND), surface treatment is applied for appearance, and only the part in contact with earth spring 13 is polished in many cases. Therefore, decorative plate 12
Was becoming expensive. Further, in the case of a small portable TV or the like, since the display screen is arranged in front of the device, the area of the decorative plate 12 naturally becomes small, which makes it impossible to secure sufficient reception performance. Further, disposing the decorative plate 12 in the front direction of the device causes useless joints in the appearance and tends to cause troubles due to management of the gap. Further, since the aluminum plate is rigid, it requires a considerable thickness, which is disadvantageous for making the device thinner.

Therefore, the present invention solves such conventional problems, and its purpose is to secure a sufficient GND area to improve the reception performance, reduce the size and thickness of the device, and reduce the number of parts. The purpose is to realize electronic equipment that enables reduction of cost, streamlined design, and cost reduction.

[Means for solving problems]

In order to solve the above problems, an electronic device of the present invention has an outer case, a liquid crystal display panel is arranged in an opening of the outer case, and a high frequency induced voltage generated between a monopole antenna and a ground potential. In an electronic device having a built-in tuner for inputting, a plate-shaped ground plate having conductivity electrically connected to the terminal unit for supplying the ground potential, and arranged so as to surround the liquid crystal panel, A conductive shield material electrically connected to the ground plate is provided in the outer case, and both the ground plate and the shield material have an area for ensuring the stability of the ground potential. The exterior case and the terminal portion are not electrically connected to each other.

[Action]

By adopting the above-mentioned structure of the present invention, as explained with reference to the embodiment shown in FIG. 1, the conductivity of the earth plate 2 which is a conductive earth material disposed inside the electronic equipment and the conductivity surrounding the liquid crystal display panel is improved. A shield plate (5 or 6 or both) that is a shield material and a ground potential for reception (GN
In order to electrically connect the terminal portion for supplying D) to at least the front case 8, the GND area can be further increased without using the front case. Therefore, it is possible to secure sufficient reception performance even if the device becomes small.
Further, since a decorative plate or the like is unnecessary, it is possible to make the device thin, reduce the number of parts, have a sleek design, and reduce costs.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of an electronic device of the present invention. A tuner pack 1 having a tuner for inputting a high frequency induced voltage generated between a monopole antenna and GND and a plate-shaped ground plate 2 are shown. Is electrically connected to the terminal portion 1a of the tuner pack 1 which is a GND supply terminal for reception by spring contact. The liquid crystal display panel 3, the panel circuit board 4, etc. are surrounded by an upper shield plate 5 and a lower shield plate 6. Of course, the upper shield plate 5, the lower shield plate 6 and the panel circuit board 4 are partially electrically connected. Here, the earth plate 2 and the lower shield plate 6 are the earth plate 2
It is electrically connected to a part 2a of the above by a spring contact. As a result, the area of GND becomes the area including the ground plate 2, the lower shield plate 6 and the upper shield plate 5, and a sufficient size is secured. In addition, 7 is a battery, 8 is a front case of the outer case (the liquid crystal display panel 3 and the like is arranged in the opening), 9 is a back case, 10 is a cover glass, and 11 is a battery lid. In this way, a sufficient GND area can be secured only inside the electronic device, and a decorative plate etc. becomes unnecessary.

Incidentally, the shield plate is not one in which the plate material is arranged vertically as in the embodiment, but may be wrapped with a sheet material using copper foil, aluminum foil, or the like, and the spring contact with the earth plate,
You may use soldering etc.

[Effect of device]

As described above, according to the present invention, the GND supply terminal portion for receiving and the shield material arranged so as to surround the ground plate and the liquid crystal display panel are electrically connected to each other, thereby making it inexpensive and simple. With the configuration, it is possible to increase the area of the conductive member that is electrically connected to the GND, thereby ensuring the stability of the GND potential and improving the reception performance.
Also, because it can be done only inside the electronic device, decorative plates etc. are not required, and it has excellent effects such as making the device smaller and thinner, reducing the number of parts, cost reduction, and a sleek design. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an electronic device of the present invention, and FIG. 2 is a sectional view showing a conventional electronic device. 1 ...... tuner pack, 1a terminal 2 ...... ground plate, 2a part 3 ...... liquid crystal display panel 4 ...... panel circuit board 5 ...... upper shield plate 6 ...... lower shield plate 7 ...... battery 8 ...... Front case 9 …… Back case 10 …… Cover glass 11 …… Battery lid 12 …… Decorative plate 13 …… Ground spring

Claims (1)

(57) [Scope of utility model registration request] 1. An electronic device having an outer case, a liquid crystal display panel arranged in an opening of the outer case, and a tuner for inputting a high frequency induced voltage generated between a monopole antenna and a ground potential. In, a conductive plate-shaped ground plate electrically connected to the terminal portion for supplying the ground potential and a conductive ground plate arranged so as to surround the liquid crystal panel and electrically connected to the ground plate. And a shield material having the inside of the outer case, both the ground plate and the shield material have an area for ensuring the stability of the ground potential, the outer case and the terminal portion, An electronic device having a configuration in which they are not electrically connected to each other.