Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1994-03-30
1995-08-15
Pascal, Robert J.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
315200A, 315240, 354415, 354418, 3541451, H05B 3700
Patent
active
054422604
ABSTRACT:
A light-emitting element drive circuit for a camera comprises a diode and a light-emitting element connected in series with each other between a power source and ground, a first switching element switchable between on and off states for driving the light-emitting element, second and third switching elements connected in series with each other between the power source and ground, and a capacitor connected between a junction point of the diode and light-emitting element and a junction point of the second and third switching elements. The second and third switching elements also constitute switching elements of a drive circuit for driving a DC motor, whereby the light-emitting element can be driven with a voltage which is approximately twice as high as the power source voltage. Since the light-emitting element is driven by a capacitor charge/discharge operation instead of using a boosted power source, the consumption of current is reduced and the light-emitting period is shortened.
REFERENCES:
patent: 4803507 (1989-02-01), Akashi et al.
patent: 4942340 (1990-07-01), Ikawa
patent: 5032864 (1991-07-01), Ishimura et al.
patent: 5327070 (1994-07-01), Seki et al.
Ito Akira
Saito Hiroyuki
Pascal Robert J.
Philogene Haissa
Seikosha Co. Ltd.
LandOfFree
Light-emitting element drive circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light-emitting element drive circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light-emitting element drive circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2184543