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Plasma display device

A plasma and display device technology, applied in static indicators, transducer shells/cabinets/stands, TVs, etc., can solve problems such as noise mixing, and achieve the effect of preventing output noise

Inactive Publication Date: 2007-05-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, in the plasma display device having the structure as in Patent Document 1, when the light emitting operation of the PDP is controlled by the above-mentioned driving method, noise may be mixed into the sound emitted from the speaker.

Method used

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Examples

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Embodiment Construction

[0059] Hereinafter, an AC type plasma display device as an example of the plasma display device according to the present invention will be described.

[0060] FIG. 1 is a block diagram showing the structure of a plasma display device according to an embodiment of the present invention.

[0061] As shown in FIG. 1, the plasma display device 100 includes a demodulator 101, a separation circuit 102, a scan number conversion unit 103, a subfield conversion unit 104, a control circuit 105, a plasma display screen (hereinafter referred to as PDP) 106, data driver 107 , scan driver 108 , sustain driver 109 , sound circuit 110 , and speaker 111 . In addition, as PDP 106, the plasma display screen demonstrated in FIGS. 15-18 can be used.

[0062] The demodulator 101 demodulates a television broadcast signal. The separation circuit 102 separates the television broadcast signal demodulated by the demodulator 101 into an image signal VS, a horizontal synchronization signal H, a vertical...

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Abstract

A voice circuit is arranged on a chassis member. The voice circuit comprises a voice output amplifier and a high-frequency bypass unit. An output terminal of the voice output amplifier is connected to one end of a voice coil in a speaker through an interconnection, and is grounded through a high-frequency bypass unit. The voice output amplifier supplies a voice current to the voice coil through an interconnection. The resonance frequency of the high-frequency bypass unit is set to the same frequency as that of a discharge current flowing in the chassis member. A high-frequency induced current generated in the voice circuit due to the discharge current flowing in the chassis member flows to a ground terminal through the high-frequency bypass unit.

Description

technical field [0001] The present invention relates to a plasma display device having an audio circuit. Background technique [0002] A plasma display device using a plasma display panel (hereinafter, abbreviated as PDP) as an active light-emitting image display has an advantage of being able to achieve thinner thickness and larger screen size. In this plasma display device, an image is displayed by utilizing light emission of a discharge cell constituting a pixel during discharge. [0003] In the above-mentioned plasma display device, a PDP assembly is formed by utilizing a PDP having electrodes on a pair of transparent glass substrates, a base member holding the PDP, and a display drive circuit block mounted on the base member (for example, refer to Patent Document 1). [0004] Fig. 15 is a perspective view of a part of a conventional AC-type PDP. In addition, FIG. 16 is a sectional view taken along line A-A of FIG. 15 , and FIG. 17 is a sectional view taken along line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/02H04N5/60H04N5/64H04R1/02G09G3/20G09G3/28G09G3/291G09G3/296G09G3/298H04N5/66H04R3/00
CPCH04N5/60H04R3/00H04N21/426
Inventor 山手万典
Owner PANASONIC CORP