Driving circuit and display
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShigeo Kigo, Hidehiko Shoji, Jumpei Hashiguchi
Life of this patent
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Abstract
In a circuit driving a capacitive load Cp, current passed through a transistor Q3, a diode D1 and a recovering coil L is passed through lines L1, L2, and the inductance components of the lines L1 and L2, and the drain-source capacitances of the transistors Q1 and Q2 generate LC resonance. Capacitors C1 and C2 are connected in parallel to the drain-source regions of the transistors Q1 and Q2 to increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.
Claims20
A driving circuit outputting a driving pulse to drive a capacitive load, comprising:
- an electrical circuit connected to a pulse supply path for supplying said driving pulse to said capacitive load;
- an interconnection portion connected to said electrical circuit;
- and
- a frequency reducing circuit for reducing the resonance frequency of LC resonance by the parasitic capacitance of said electrical circuit and the inductance component of said interconnection portion.
A display device, comprising:
- a display panel including a plurality of capacitive loads composed of a plurality of electrodes;
- and
- a driving circuit outputting a driving pulse to drive said capacitive load in said display panel,
- said driving circuit comprising:
- an electrical circuit connected to a pulse supply path for supplying said driving pulse to said capacitive load;
- an interconnection portion connected to said electrical circuit;
- and
- a frequency reducing circuit for reducing the resonance frequency of LC resonance by the parasitic capacitance of said electrical circuit and the inductance component of said interconnection portion.
Dependencies are inferred from the claim text.