Driver circuit for loads such as LED, OLED or LASER diodes

Details Driver circuit for loads such as LED, OLED or LASER diodes Driver circuit for loads such as LED, OLED or LASER diodes

2011-07-12

2011-07-12

Park, Kinam (Department: 2828)

Coherent light generators

Particular component circuitry

Power supply

C372S039000, C372S038010, C372S038070

Reexamination Certificate

active

07978743

ABSTRACT:
A driver circuit for driving loads such as LED, OLED or LASER diode devices includes a switching converter that has a switching element and reactive elements to provide an output switching voltage by sequential switching operations of the switching element. The load is connected to the output switching voltage. A linear current driver circuit is connected in series to the load and includes an amplification element and a feedback circuit with a current control input. In order to enable the circuit to be easily used, a control unit is provided with a sensing input for a current or voltage at the linear current driver. A microcontroller executes a control program for processing the sensing input and providing both a current control output and a switching control output, set in accordance with a set current value.

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