LIGHT-EMITTING ELEMENT DRIVE CIRCUIT

LIGHT-EMITTING ELEMENT DRIVE CIRCUIT

PROBLEM TO BE SOLVED: To provide a light-emitting element drive circuit that can shorten delay time from the input of a light emitting signal to sufficient light emission by the light emitting element. SOLUTION: A power supply circuit 2 is brought into operation in advance so that so small a current...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: TABATA KATSUYUKI
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a light-emitting element drive circuit that can shorten delay time from the input of a light emitting signal to sufficient light emission by the light emitting element. SOLUTION: A power supply circuit 2 is brought into operation in advance so that so small a current (a primary current) as not to cause a Light Emitting Diode 3 (LED 3) to emit light may flow through the LED 3, and by entering a light emitting signal SL, the current running through the LED 3 is changed to a current (a secondary current) with a current value required for the LED 3 to emit light. COPYRIGHT: (C)2010,JPO&INPIT