JPH0935645A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the shielding of a spring clip to fix a flexible wire to connect a PDP with a circuit board, and besides, to suppress spurious radiation enough. SOLUTION: PDP 3 is opposed to a circuit board 1 through a shield plate 2. A flexible wire 5 to electrically connect the PDP with the circuit board is fixed to the circuit board 1 by a spring clip 5. Using it as is will make the metallic spring clip 5 radiate spurious waves, functioning as an antenna. To prevent this, the periphery of the spring clip 5 is caught and covered by the first contact clip 6 consisting of metal U shaped in cross section. With only this first contact clip, the suppression of spurious radiation is not enough, this periphery is further caught and covered with the second contact clip consisting of metal. The second contact clip and the casing frame 9 of the plasma display device are electrically connected with each other by the contact terminal 8 consisting of metal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device which reliably prevents unnecessary radiation of radio waves.

[0002]

2. Description of the Related Art P used in a plasma display device
Between the DP (plasma display panel) and the signal substrate that drives it, the signal substrate and the electrodes of the PDP are connected by flexible wires. Since an impulse-shaped discharge current flows through this flexible wire, unnecessary radiation of radio waves is generated. In order to suppress this unnecessary radiation, there is a method of sandwiching a conductive gasket between the spring clip that stops the flexible wire and the housing frame. is there. There is also a problem that measures against unnecessary radiation are insufficient.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a technique for sufficiently suppressing unnecessary radiation without causing a problem even when the temperature rises. is there.

[0004]

[Means for Solving the Problems] A first electrical conductor formed on the outer circumference of a spring clip for stopping a flexible wire connecting between a PDP and a circuit board, sandwiching the spring clip.
Contact strips are arranged, the contact strips are covered with the contact strips on the outer periphery of the first contact strips, and the contact strips are made of an electric conductor having contact terminals that come into contact with the casing frame of the plasma display device made of an electric conductor. A second contact strip is placed to electromagnetically shield the spring clip and bring it to the same potential as the housing frame.

The contact strip is made of stainless steel.

The contact terminal of the second contact strip is a U-shaped spring, and the tip of the contact terminal is pressed against the casing of the plasma display device.

The contact terminals of the second contact strip are phosphor bronze.

[0008]

A first contact strip made of an electric conductor is provided on the outer circumference of a spring clip that holds a flexible wire connecting between the PDP and the circuit board, and the first contact strip is covered with the spring clip. A second contact strip made of an electric conductor having a contact terminal that contacts the contact strip and sandwiches the contact strip in contact with the casing frame of the plasma display device made of an electric conductor is arranged to shield the spring clip from electromagnetic waves. By setting the same potential as the case frame, the position of the contact strip does not move even if the temperature of the spring clip or the like rises, and sufficient unnecessary radiation can be suppressed.

The contact strip made of stainless steel facilitates production and maintenance.

The U-shaped spring is used as the contact terminal of the second contact strip, and the tip of the contact terminal is pressed against the casing of the plasma display apparatus to facilitate the assembly of the apparatus and to achieve the above-mentioned function. Play well.

The contact terminal of the second contact strip is made of phosphor bronze so that it can be elastically contacted with the housing frame.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plasma display device according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a plasma display device according to the present invention (A).
It is a rear view in a housing | casing and (B) CC sectional drawing. The PDP 3 faces the circuit board 1 via the shield plate 2. PD
Flexible wire 5 for electrically connecting P and the circuit board
Are fastened to the circuit board 1 with spring clips 5. When used as it is, the metal spring clip 5 functions as an antenna and radiates unnecessary radio waves. In order to prevent this, the outer circumference of the spring clip 5 is covered with a first contact clip 6 made of a metal having a U-shaped cross section. Since the unnecessary radiation is not sufficiently suppressed only by the first contact clip, the outer periphery is further sandwiched and covered by the second contact clip 7 made of metal. The second contact clip and the casing frame 9 of the plasma display device are electrically connected by the contact terminal 8 made of metal.

The first contact strip 6 and the second contact strip 7 can be covered with the spring clip 6 and the first contact strip sandwiched between them, and are made of a metal or the like that has electromagnetic conductivity and is elastic and elastic. I wish I had it. Among them, stainless steel (Stainless steel) formed in a U-shape is suitable for this application because it does not require surface treatment and has elasticity.

Contact terminals 8 for connecting the second contact strip 7 and the casing frame of the plasma display device.
Can be made of the same material as the second contact strip, and a part of the second contact strip is formed in a U shape, but phosphor bronze having more elasticity can also be used.

[0015]

As described above, the outer circumference of the spring clip for fastening the flexible wire connecting the PDP and the circuit board for driving the PDP is covered and sandwiched by the double conductive contact strips. By electrically connecting to the contact strip, the contact strip is not damaged even if the temperature inside the device rises, and the safety is excellent.
Further, since the contact strips are doubled, it is possible to take sufficient measures against unnecessary radiation.

[Brief description of drawings]

1A and 1B are a rear view of an inside of a casing and a cross-sectional view of the same CC of FIG.

[Explanation of symbols]

 1 Circuit Board 2 Shield Plate 3 PDP 4 Flexible Wire 5 Spring Clip 6 First Contact Strip 7 Second Contact Strip 8 Contact Terminal 9 Housing Frame

Claims (4)

[Claims] 1. PDP (Plasma Display Panel)
In a plasma display device that operates by connecting a flexible wire between a circuit board that drives the PDP and a PDP, a first electrical conductor that covers the spring clip holding the flexible wire by sandwiching the spring clip therebetween.
An electrical conductor having a contact strip disposed on the outer periphery of the first contact strip, the contact strip being sandwiched between the first contact strip and the first contact strip, and the contact strip being in contact with the casing frame of the plasma display device made of the electrical conductor. And a second contact strip, which shields the spring clip electromagnetically and has the same potential as the casing frame. 2. The plasma display device according to claim 1, wherein the contact strip is made of stainless steel. 3. The contact terminal of the second contact strip is a U-shaped spring, and the tip of the contact terminal is pressed against the housing of the plasma display device. The plasma display device described. 4. The plasma display device according to claim 3, wherein the contact terminals of the second contact strip are made of phosphor bronze.