JPH10271414A - Television receiver - Google Patents

Abstract

(57) [Problem] To solve the problem that, when the material of a cabinet of a consumer television set is changed from resin to metal, a discharge shock is felt when a human body is charged by static electricity. It is an object of the present invention to provide a television receiver capable of reducing a discharge shock by incorporating a static elimination circuit. SOLUTION: An exterior body of the television receiver is made of metal, and oscillation circuits 11 and 12 are incorporated into a main P plate inside the set so as to consume static energy, and connected to a metal plate of the exterior. That is to say,

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver provided with an image display unit, a control circuit unit, and an exterior body fixed to these and processed with metal.

[0002]

2. Description of the Related Art In general, a television receiver has an image display unit (hereinafter, referred to as a CRT), a control circuit unit, and an exterior body for enclosing (exteriorizing) these inside. For example, a television receiver whose exterior body is made of resin has a configuration as shown in FIG. Cathode ray tube (CRT)
(Not shown)) is attached to the front cabinet 110 made of resin, and a resin back cover 111 is attached to the front cabinet 110 from the back.

[0003] As described above, in the conventional television receiver having a resin exterior body, since the exterior body is made of an insulator, a phenomenon that a shock occurs when static electricity accumulated in a human body is discharged occurs. Did not. For this reason, no countermeasure has been taken to alleviate the shock to static electricity.

[0004]

In addition, television receivers having a metal outer casing have been developed for these resin outer casings from the viewpoint of environmental impact and recycling. FIG. 8 shows a schematic diagram thereof. 121 is a top plate, 12
2 is a bottom plate, 123 is a front plate, 124 is a side plate, and 125 is a back plate, all of which are made of metal. These members are connected and supported by the frame structure 126,
Although not shown, it is configured to include a printed circuit board such as a signal processing circuit of a television receiver installed on the bottom plate 122.

[0005] A television receiver having such a metal cabinet has a problem that a shock is felt when static electricity accumulated in a human body is discharged.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a television receiver having an image display section, a control circuit section, and an exterior body fixed to these and processed with metal. In addition, the set body has a built-in oscillation circuit for consuming electric energy due to static electricity, and the operation remote control also has a built-in conductive sponge, which is connected to a resistor to consume electric energy. A television receiver whose exterior is a metal cabinet, wherein a conductive sheet having a high resistance value is further provided around the operation section of the set body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A television receiver according to a first aspect of the present invention has an image display section, a control circuit for displaying an image or the like on the image display section, and the image display section and the control circuit fixed. A television receiver comprising a metal exterior body covering the television receiver, wherein energy of static electricity can be consumed by driving oscillation of the IC. It prevents shock caused by static electricity even if touched.

According to a second aspect of the present invention, there is provided a television receiver, comprising: an image display unit; a control circuit for displaying an image or the like on the image display unit; and a metal fixed and covering the image display unit and the control circuit. A television receiver comprising: an exterior body, wherein two oscillation circuits for positive charge and negative charge are independently installed and connected to the exterior body, respectively, and are installed inside the exterior body. This is to prevent a shock due to static electricity.

According to a third aspect of the present invention, there is provided a television receiver comprising: an image display section; a control circuit for displaying an image or the like on the image display section; and a metal fixed and covering the image display section and the control circuit. A television receiver comprising an exterior body, comprising a ventilation hole in the exterior body, and a conductive sponge inside the exterior body around the ventilation hole, wherein the sponge and the exterior body are connected via a resistor. It is characterized by being electrically conductive, and prevents static electricity shock caused by discharging static electricity, which is charged to a human body upon contact, to an exterior body of a television receiver.

According to a fourth aspect of the present invention, there is provided a television receiver comprising: an image display unit; a control circuit for displaying an image or the like on the image display unit; and a metal fixed and covering the image display unit and the control circuit. A television receiver comprising an exterior body of the above, characterized in that a conductive sheet having a high resistance value is attached to a portion around switches for operation and a front side of a door, and the static electricity is discharged. This is to prevent shock.

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the exterior body of the television receiver of the present invention is a circuit incorporated in a printed wiring board of a main chassis in a set made of metal.

[0013] The metal exterior body refers to a generic name such as, for example, iron such as a painted steel plate and a painted Mg / Al alloy.

In this circuit, electric energy charged in the exterior cabinet by static electricity can be consumed by an oscillation circuit mainly including a C-MOS IC. Generally, when a human body charged by static electricity approaches an insulator, charges of the opposite polarity to the charged human body due to a dielectric phenomenon accumulate on the surface of the insulator. Since the exterior body of the metal cabinet uses painted steel plate, the surface is an insulator. Therefore, when the charged human body approaches the exterior cabinet, a charge having a polarity opposite to that of the charged human body is generated on the surface of the exterior cabinet due to a dielectric phenomenon. In particular, when the atmosphere is dry in winter, the amount of charge on the human body tends to increase, and the potential difference between the charged human body and the surface of the exterior cabinet increases due to the dielectric phenomenon. When this potential difference exceeds the dielectric breakdown strength of air, a discharge occurs and a human body feels a shock. In this circuit, when a charged human body approaches an exterior cabinet, the electric energy of the opposite polarity charge generated by the dielectric phenomenon is consumed by the oscillation circuit, thereby halving the potential difference. Regarding the charging of the human body, it is not possible to specify whether the charging is positive or negative, so two oscillation circuits are built in so that the oscillation circuit can operate even if both are charged, and each influences each other. It is characterized by being independent of the circuit so as not to be.

In FIG. 1, the circuit for positive and negative charges of the present circuit has a function of eliminating static charge by being electrically connected to an external cabinet separately. The operation of the circuit for positive charges will be described. FIG.
The side connected to the exterior cabinet is the plus side of the power supply of this circuit, and the ground is G in FIG. When the human body is considered as a power source, a metal cabinet in contact with the human body is a positive power source, and G in FIG. 1 is connected to the negative side via the human body in contact with the ground. The circuit of FIG. 1 oscillates by connecting the outputs of the gates in multiple stages, providing a time delay and feeding back to the input.

By using a CMOS IC for the oscillation circuit, it is possible to drive at a low voltage. In the circuit of FIG. 1, since the electrical connection between G and the human body has a very high impedance, only a low voltage is applied between the positive side of the power supply of the circuit and G. Therefore, in order to operate as an oscillation circuit, a low voltage is required, and for example, operation is impossible with a bipolar element such as TTL.

The operation of the circuit for negative charges is exactly the same as that of the circuit for positive charges, except that the operation is exactly the same. In this circuit, the circuits for the positive charge and the negative charge are separately and independently formed, so that the charge can be removed regardless of the polarity of the human body.

FIG. 2 is a perspective view showing a state in which the printed wiring board 10 on which the present circuit is mounted is installed in the metal cabinet set 5.

The part connecting the circuit of FIG. 1 to the exterior cabinet is electrically connected to the metal cabinet set 5 by mounting terminals 9. The place where the printed wiring board 10 is installed is not limited as long as electrical continuity is ensured. Further, even if this circuit is divided into two, one for positive charge and the other for negative charge, and they are separately printed wiring boards and electrically connected to the metal cabinet set 5, there is an effect of removing static electricity accumulated in the human body. . The same effect can be obtained by incorporating this circuit into a printed wiring board on which the main chassis of the television set is mounted.

According to the first embodiment of the present invention, there is an effect that a discharge shock due to static electricity which is not a problem in the conventional resin cabinet can be reduced.

(Embodiment 2) Another embodiment of the metal cabinet of the present invention will be described with reference to FIG. FIG. 2 is a perspective view for explaining the internal configuration of the metal cabinet. In FIG. 2, 5 is a metal cabinet, 2 is a vent provided in the metal cabinet 5, 3 is a conductive sponge, 4 is a resistor, and 5 is a mounting terminal connected to the resistor 4.

This shows a state in which the conductive sponge 3 is adhered to the back side of the periphery of the operation section of the metal cabinet set 5, and furthermore, the conductive sponge 3 is installed via the resistor 4 so as to ensure conduction with the metal cabinet set 5. The resistor 4 is provided with a mounting terminal 9 for establishing conduction with the metal cabinet set 5.

According to the second embodiment of the present invention, the ventilation holes 2 are provided around the operation section of the metal cabinet set 5 in order to remove the static electricity of the charged human body when operating the television receiver. . When a part of the charged human body comes into contact, the static electricity of the human body is positively taken in from the ventilation hole 2 and released to the metal cabinet set 5 without being rapidly discharged by the conductive sponge 3 and the resistor 4. Becomes possible.

It is also possible to use the configuration of FIG. 2 in another way, and an example thereof will be shown with reference to FIGS. FIG.
Is a perspective view of an outer case of the remote control main body, and FIG. 4 is a sectional view of the remote control main body.

As in the case of the television receiver main body, a vent hole 2 is provided on the side surface of the outer case 1 of the remote control main body in order to remove the static electricity of the charged human body when operating using the remote control. When the outer case 1 of the remote control main body is grasped by hand, the static electricity of the human body can be positively taken in from the ventilation hole 2. The dielectric of the charged human body due to static electricity becomes an electric charge of opposite polarity by the conductive sponge 3 attached to the inside of the remote control main body, and is converted into electric energy by connecting both the conductive sponges 3 with a resistor, and the electric current is converted into electric energy. And flows to the resistor 4. At this time, the current flowing through the resistor 4 is consumed as heat energy. By incorporating this antistatic unit inside the remote control body, the static electricity accumulated on the human body can be removed, so even if the exterior directly touches the TV set which is a metal cabinet, the discharge shock due to the static electricity can be eliminated. it can.

According to the above description, in the case of the set main body of the television receiver, the static electricity can be removed by operating the television receiver by touching the main body, and the static electricity can be removed even when the remote controller is operated.

(Embodiment 3) Another embodiment of a television receiver will be described with reference to the drawings.

FIG. 5 is a perspective view of a television set whose exterior is a metal cabinet. Third of the present invention
According to the embodiment, a conductive sheet having a high resistance value is attached to the front side of the door portion 6. FIG. 6 is a perspective view of the vicinity of an operation unit of a television set whose exterior is a metal cabinet. Hereinafter, the details will be described with reference to FIGS.

When the exterior comes into contact with a television set, which is a metal cabinet, in a state where the human body is charged by static electricity, a discharge phenomenon occurs. At this time, a large amount of current flows instantaneously, thereby giving a discharge shock to the human body. If a conductive sheet 7 having a high resistance value is attached to a place where a person is likely to touch frequently, it is possible to prevent a large amount of current from flowing instantaneously during discharging.

As described above, according to the third embodiment of the present invention, the resistance value is set at the front side of the door portion and around the operation button when the door is opened, as a target of a portion of the television set which is likely to be touched by a person. By attaching a high conductive sheet 7,
It is possible to eliminate discharge shock from a charged human body.

[0031]

The television receiver of the present invention has a static electricity elimination circuit, or a ventilation hole and a conductive sponge and a resistance around the ventilation hole, and has a remote control body in addition to the television receiver. By incorporating a conductive sponge and a resistor inside the device, and attaching a conductive sheet having a high resistance value to a place where a person is likely to touch frequently, a discharge shock due to static electricity can be eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an electrostatic charge elimination circuit according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a printed wiring board on which the static electricity elimination circuit is mounted is installed in a television receiver.

FIG. 3 is an external perspective view showing a remote controller according to another embodiment of the present invention.

FIG. 4 is a sectional view of the remote controller.

FIG. 5 is a perspective view of an exterior body according to another embodiment of the present invention.

FIG. 6 is a perspective view of a part around an operation unit of an exterior body according to another embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a schematic configuration of a television receiver provided with a conventional resin exterior body.

FIG. 8 is an exploded perspective view showing a schematic configuration of a television receiver having a conventional metal exterior body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer case of remote control main body 2 Vent hole 3 Conductive sponge 4 Resistor 5 Metal cabinet set 6 Door part 7 Conductive sheet 8 Operation button 9 Mounting terminal 10 Printed wiring board for static electricity removal 11, 12 Oscillation circuit

Continued on the front page (72) Inventor Masahiko Hirata 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A television receiver comprising: an image display unit; a control circuit for displaying an image or the like on the image display unit; and a metal exterior body that fixes and covers the image display unit and the control circuit. A television receiver characterized in that energy can be consumed by driving oscillation of an IC. 2. A television receiver comprising: an image display section; a control circuit for displaying an image or the like on the image display section; and a metal exterior body that fixes and covers the image display section and the control circuit. A television receiver, wherein two oscillating circuits for power and negative charge are independently and separately connected to the exterior body, and installed inside the exterior body. 3. A television receiver comprising: an image display section; a control circuit for displaying an image or the like on the image display section; and a metal exterior body that fixes and covers the image display section and the control circuit. A television receiver, comprising: a body having a ventilation hole, and a conductive sponge inside the exterior body around the ventilation hole, wherein the sponge and the exterior body are electrically conductive via a resistor. 4. An operation is performed in a television receiver including an image display unit, a control circuit for displaying an image or the like on the image display unit, and a metal exterior body that fixes and covers the image display unit and the control circuit. A television receiver characterized in that a conductive sheet having a high resistance value is attached to a peripheral portion of a switch and a front side of a door.