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Driving circuit and display device

A technology for driving circuits and circuits, which is applied in the direction of electrical components, electronic switches, static indicators, etc., and can solve problems such as inability to fully suppress switching noise, harsh electromagnetic effects of electronic equipment, and inability to sufficiently suppress high-frequency electromagnetic wave radiation.

Inactive Publication Date: 2008-04-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in this case, only switching noise with specific frequency components can be absorbed
Therefore, switching noise with various frequency components cannot be sufficiently suppressed
As a result, radiation of high-frequency electromagnetic waves cannot be sufficiently suppressed
[0014] The radiation of high-frequency electromagnetic waves with such various frequency components may have adverse electromagnetic effects on other electronic equipment

Method used

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  • Driving circuit and display device
  • Driving circuit and display device
  • Driving circuit and display device

Examples

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Embodiment Construction

[0091] Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

[0092] As an example of a drive circuit according to the present invention, a sustain driver used in a plasma display device will be described.

[0093] (1) First Embodiment

[0094] (1-1) Configuration of plasma display device

[0095] FIG. 1 is a block diagram showing the configuration of a plasma display device using a sustain driver according to a first embodiment of the present invention.

[0096]The plasma display device of FIG. 1 includes a PDP (plasma display panel) 1 , a data driver 2 , a scan driver 3 , a plurality of scan driver ICs (integrated circuits) 3 a , and a sustain driver 4 .

[0097] PDP 1 includes a plurality of address electrodes (data electrodes) 11 , a plurality of scan electrodes 12 , and a plurality of sustain electrodes (sustain electrodes) 13 . A plurality of address electrodes 11 are arranged along the vertical direction ...

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Abstract

A first impedance control circuit (41) includes a plurality of capacitors connected in parallel with a first transistor (Q1), and a second impedance control circuit (42) includes a plurality of capacitors connected in parallel with a second transistor (Q2). Capacitors (C11.....C1n) in the first impedance control circuit (41) respectively have different capacitance values, and capacitors (C21.....C2n) in the second impedance control circuit (42) respectively have different capacitance values. The respective self-resonance frequencies of the capacitors in the first impedance control circuit (41) differ, and the respective self-resonance frequencies of the capacitors in the second impedance control circuit (42) differ. Switching noises each having a plurality of frequencies generated from first and second transistors (Q1, Q2) are respectively absorbed in a power supply terminal and a ground terminal through the first and second impedance control circuits (41, 42).

Description

technical field [0001] The present invention relates to a drive circuit for driving a capacitive load with a drive pulse, and a display device using the drive circuit. Background technique [0002] As a conventional drive circuit for driving a capacitive load, for example, a sustain driver for driving sustain electrodes of a plasma display panel is known. [0003] FIG. 16 is a circuit diagram showing the configuration of a conventional sustain driver. As shown in FIG. 16, the hold driver 400 includes a recovery capacitor C401, a recovery coil L401, switches SW11, SW12, SW21, SW22, and diodes D401 and D402. [0004] The switch SW11 is connected between the power supply terminal V4 and the node N11, and the switch SW12 is connected between the node N11 and the ground. The power supply voltage Vsus is applied to the power supply terminal V4. The node N11 is connected to, for example, 480 sustain electrodes. In FIG. 16 , a panel capacitance Cp corresponding to the total capac...

Claims

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Application Information

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IPC IPC(8): G09G3/28G09G3/20G09G3/288G09G3/291G09G3/294G09G3/296G09G3/298H03K17/16H03K17/687
CPCG09G3/2965G09G2330/06G09G3/296
Inventor 山手万典
Owner PANASONIC CORP