DRIVE CIRCUIT, ILLUMINATION SOURCE, AND LIGHTING DEVICE
First Claim
1. A drive circuit for causing a light-emitting element to emit light, using a dimming signal which is an alternating current signal which has been phase-controlled in response to a dimming level, the drive circuit comprisinga control signal generating unit configured to integrate a voltage of a signal obtained by rectifying the dimming signal to generate a control signal for controlling luminance of the light-emitting element, the voltage being greater than or equal to a first voltage and less than or equal to a second voltage lower than a maximum voltage of the dimming signal.
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Accused Products
Abstract
A drive circuit (1) according to the present invention is a drive circuit which causes an LED module (4) to emit light, using a dimming signal which is an alternating current signal which has been phase-controlled in response to a dimming level, the drive circuit (1) including a control signal generating unit (8) which integrates a voltage of a rectified dimming signal to generate a control signal for controlling the luminance of the LED module (4), the voltage being greater than or equal to a first voltage and less than or equal to a second voltage less than a maximum voltage of the dimming signal.
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Citations
12 Claims
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1. A drive circuit for causing a light-emitting element to emit light, using a dimming signal which is an alternating current signal which has been phase-controlled in response to a dimming level, the drive circuit comprising
a control signal generating unit configured to integrate a voltage of a signal obtained by rectifying the dimming signal to generate a control signal for controlling luminance of the light-emitting element, the voltage being greater than or equal to a first voltage and less than or equal to a second voltage lower than a maximum voltage of the dimming signal.
Specification