JP2005121703A - Plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the reliability of connection in a drive circuit of a plasma display device. <P>SOLUTION: The back face side of a chassis member, disposed with the plasma display panel on a front side of the the plasma display device, is equipped with a panel module which is disposed with a drive circuit block for light emission driving of a plasma display panel and a case in which the panel module is housed and which consists of a front case section and a back case section having a plurality of vent holes. The drive circuit block of the panel module has a flexible cable 26, having a plurality of wiring patterns and a connector 22 equipped with a plurality of terminals 24, connected with the plurality of the wiring patterns of the flexible cable 26, and the connector 22 is provided with a dustproof cover 27 for preventing dust from sticking to the terminals 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a plasma display device known as a thin, lightweight display device having a large screen.

  A plasma display device is capable of high-speed display compared to a liquid crystal panel, has a wide viewing angle, is easy to increase in size, and is self-luminous, so that the display quality is high. Recently, it has attracted particular attention in technology.

  First, the structure of the plasma display panel in the plasma display device will be described with reference to FIG. As shown in FIG. 2, on a transparent front substrate 1 such as a glass substrate, a plurality of stripe-shaped display electrodes 2 that are paired with a scan electrode and a sustain electrode are formed, and covers the electrode group. Thus, the dielectric layer 3 is formed, and the protective film 4 is formed on the dielectric layer 3.

  A plurality of rows of stripes covered with an overcoat layer 6 are formed on the substrate 5 on the back side opposite to the substrate 1 on the front side so as to intersect the display electrodes 2 of the scan electrodes and the sustain electrodes. Address electrodes 7 are formed. On the overcoat layer 6 between the address electrodes 7, a plurality of barrier ribs 8 are arranged in parallel with the address electrodes 7, and a phosphor layer 9 is provided on the side surface between the barrier ribs 8 and on the surface of the overcoat layer 6. Yes.

  The substrate 1 and the substrate 5 are arranged to face each other with a minute discharge space so that the display electrode 2 and the address electrode 7 of the scan electrode and the sustain electrode are almost orthogonal, and the periphery is sealed, In the discharge space, one or a mixed gas of helium, neon, argon, and xenon is sealed as a discharge gas. Further, the discharge space is divided into a plurality of sections by partition walls 8 to provide a plurality of discharge cells where the intersections of the display electrodes 2 and the address electrodes 7 are located, and each of the discharge cells has red, green and blue colors. The phosphor layers 9 are sequentially arranged one by one so that

  FIG. 3 shows an electrode arrangement of the plasma display panel. As shown in FIG. 3, the scan electrode, the sustain electrode, and the address electrode have a matrix configuration of M rows × N columns, and M rows are arranged in the row direction. Scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged, and N columns of address electrodes D1 to DN are arranged in the column direction.

  In the plasma display panel having such an electrode configuration, an address pulse is applied between the address electrode and the scan electrode by applying a write pulse between the address electrode and the scan electrode, and after selecting the discharge cell, the scan electrode By applying a periodic sustain pulse that is alternately inverted between the sustain electrode and the sustain electrode, a sustain discharge is performed between the scan electrode and the sustain electrode, and a predetermined display is performed.

  FIG. 4 shows an example of the overall configuration of the plasma display device. In the figure, reference numeral 10 denotes a panel having the structure shown in FIG. 2, and a case for housing a panel module using the panel 10 includes a front case portion 11 and a metal back case portion 12. A front cover 13 made of glass that also serves as protection for the optical filter and the panel 10 is disposed in the opening. Further, the front cover 13 is subjected to, for example, silver vapor deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back case portion 12 is provided with a plurality of vent holes 12a for releasing heat generated in the panel 10 or the like to the outside.

  The panel 10 is held by adhering to the front surface of a chassis member 14 made of aluminum or the like via a heat conductive sheet 15, and a plurality of drives for driving the panel 10 to emit light are provided on the rear surface side of the chassis member 14. A circuit block 16 is attached to form a panel module. The drive circuit block 16 includes an electric circuit for performing display drive and control of the panel 10, and extends to the electrode lead-out portion that is drawn to the edge portion of the panel 10 beyond the four-side edge portions of the chassis member 14. They are electrically connected by a plurality of flexible wiring boards (not shown).

  Further, a boss portion 14a for attaching the drive circuit block 16 and fixing the back case portion 12 is protruded from the rear surface of the chassis member 14 by die-casting or the like. The chassis member 14 may be configured by fixing a fixing pin to an aluminum flat plate.

In such a plasma display device, the drive circuit block of the panel module has a flexible cable having a plurality of wiring patterns and a connector having a plurality of terminals to which the plurality of wiring patterns of the flexible cable are connected. ing. And as a structure of the connector which connects a flexible cable, what was indicated in patent documents 1 etc. is known.
JP 2002-222683 A

  In such a plasma display device, there is a possibility that the terminal of the connector to which the flexible cable is connected is short-circuited by dust that has entered the case of the plasma display device.

  The present invention has been made in view of such problems, and an object of the present invention is to improve the reliability of connection in a driving circuit inside a plasma display device.

  In order to achieve the above object, the present invention provides a panel module configured by disposing a driving circuit block for driving the plasma display panel to emit light on the back side of a chassis member having a plasma display panel disposed on the front surface. And a case composed of a front case portion and a back case portion having a plurality of vent holes, the drive circuit block of the panel module includes a flexible cable having a plurality of wiring patterns and a plurality of the flexible cables. A connector having a plurality of terminals to which the wiring pattern is connected, and a dustproof cover for preventing dust from adhering to the terminals.

  According to the present invention, by providing the dustproof cover, it is possible to prevent the connector terminal portion from being short-circuited by dust that has entered the case of the plasma display device, and to improve the reliability of the connection of the drive circuit portion.

  Hereinafter, a plasma display apparatus according to an embodiment of the present invention will be described with reference to FIG. 1, but the embodiment of the present invention is not limited to this.

  FIG. 1 is an enlarged cross-sectional view showing a main part of a driving circuit block inside a plasma display device according to an embodiment of the present invention, and 21 is a printed wiring board used for the driving circuit block, and a predetermined wiring pattern is formed. Has been.

  Reference numeral 22 denotes a connector mounted on the printed wiring board 21. The connector 22 has a plurality of terminals 24 arranged in a housing 23 made of resin. The terminal 24 has a structure in which the rear end is electrically connected to the wiring pattern of the printed wiring board 21 by solder and the front end is bent to give elasticity. In addition, the connector 22 includes a terminal connection cover 25 that is supported and arranged on the housing 23 so as to be rotatable in the direction of the arrow in FIG. 1, and is a flexible cable in which a plurality of wiring patterns are formed on a resin film. The flexible cable 26 is connected to the terminal of the connector 22 by inserting the tip of the cable 26 into the connector 22 and rotating the terminal connection cover 25 to press the terminal portion of the flexible cable 26 against the terminal 24 of the connector 22. be able to.

  A dust-proof cover 27 prevents dust from adhering to the terminals 24 of the connector 22, and is disposed on the connector 22 by being attached to the printed wiring board 21 so as to cover the terminals 24 exposed to the outside of the connector 22.

  That is, according to the present invention, even if dust enters the inside through the air hole vacated in the back case portion of the plasma display device, the terminal 24 of the connector 22 is covered with the dustproof cover 27. There is no occurrence of a short circuit due to dust adhering, and the connection reliability in the drive circuit block can be improved.

  As described above, according to the present invention, it is useful that the reliability of the connection of the driving circuit of the plasma display device can be improved.

Sectional drawing which shows the principal part structure inside the plasma display apparatus by one embodiment of this invention The perspective view which shows schematic structure of the panel of a plasma display apparatus. Explanatory drawing which shows the electrode arrangement of the panel of the plasma display apparatus An exploded perspective view showing an example of the configuration of the plasma display device

Explanation of symbols

22 Connector 24 Terminal 26 Flexible cable 27 Dust cover

Claims (1)

A panel module configured by disposing a drive circuit block for driving the plasma display panel to emit light on the back side of a chassis member having a plasma display panel disposed on the front surface, and a front case portion and a plurality of the plurality of housing modules. The panel module drive circuit block includes a flexible cable having a plurality of wiring patterns and a plurality of terminals to which the plurality of wiring patterns of the flexible cable are connected. A plasma display device, comprising: a connector provided with a dustproof cover for preventing dust from adhering to the terminal.

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