Driving circuit for a light emitting element

Details Driving circuit for a light emitting element Driving circuit for a light emitting element

2005-07-05

2005-07-05

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C315S169300, C315S291000, C372S038020, C372S038070, C372S029015, C372S026000

Reexamination Certificate

active

06914387

ABSTRACT:
It is an object of the present invention to provide a driving circuit which can drive a light emitting element in spite of a reduced power supply voltage and which is thus suitable for size reduction. The present invention provides a driving circuit which supplies a bias current to a light emitting element and which carries out modulation on the basis of voltage driving, the driving circuit comprising a boosting circuit that increases a power supply voltage Vcc, a resistance element connected between an output of the boosting circuit and an anode terminal of the light emitting element, and a capacitive element connected to the anode terminal of the light emitting element to supply a modulation signal to the light emitting element for voltage driving.

REFERENCES:
patent: 6362910 (2002-03-01), Tokita
patent: 6580657 (2003-06-01), Sanford et al.
patent: 6597209 (2003-07-01), Iguchi et al.
patent: 2002/0131358 (2002-09-01), Nagara
patent: P2000-138415 (2000-05-01), None

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