Circuit for supplying power to a dental photopolymerizing apparatus
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United States of America Patent
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-
Jun 13, 1989
Grant Date -
N/A
app pub date -
Feb 19, 1987
filing date -
Feb 19, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric lamp for the photopolymerization of dental materials is supplied with constant electric power so that constant light output is obtained. The control circuit used to this end operates with a triac (3) connected between an a.c. voltage supply (2) and the lamp (1), said triac being controlled by signal values stored in a read-only memory of a microprocessor (4). Said stored values are respectively allocated to pairs of instantaneous values of lamp current and lamp voltage, the instantaneous values being detected in each cycle of the a.c. supply voltage and being utilized to address the read-only memory.
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