LED DRIVE METHOD AND LED DRIVE DEVICE

LED DRIVE METHOD AND LED DRIVE DEVICE

An LED drive method drives an LED by a drive current. The LED drive method uses a voltage conversion unit, which includes a coil and a first switch, and converts an external voltage into a first voltage, which is a DC voltage, by controlling the first switch to be on in an on-pulse period of a first...

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Hauptverfasser: NAKAMURA Makoto, KITAMURA Mamoru, SUZUKI Motoaki, FUKUDA Keisuke
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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creator NAKAMURA Makoto
KITAMURA Mamoru
SUZUKI Motoaki
FUKUDA Keisuke
description An LED drive method drives an LED by a drive current. The LED drive method uses a voltage conversion unit, which includes a coil and a first switch, and converts an external voltage into a first voltage, which is a DC voltage, by controlling the first switch to be on in an on-pulse period of a first drive signal. A constant current drive unit is provided with the first voltage and generates a drive current based on a second drive signal.
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subjects ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
title LED DRIVE METHOD AND LED DRIVE DEVICE
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