DRIVE CIRCUIT AND IMAGE PROJECTION APPARATUS

A drive circuit for supplying a drive current to light emitting elements includes an output circuit that sets a magnitude of the drive current based on an assumed value of a threshold current being a threshold value of the drive current, an acquisition circuit that acquires an optical-output monitor...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	UJIIE, Yusuke, Kawasoe, Nobuaki, HATAE, Shuhei, FURUYA, Akiko, KATOU, TOMOKI, FUKINO, Hiromi
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	A drive circuit for supplying a drive current to light emitting elements includes an output circuit that sets a magnitude of the drive current based on an assumed value of a threshold current being a threshold value of the drive current, an acquisition circuit that acquires an optical-output monitor value indicating a magnitude of an optical output of the light emitting elements, a first calculation circuit that calculates an average value of the drive current in a predetermined period in a frame period as an average drive current value for each of the predetermined period, a second calculation circuit that calculates an average value of the optical-output monitor values in the predetermined period as an average optical-output monitor value, and an adjustment circuit that adjusts the assumed value of the threshold current value based on the average drive current value and the average optical-output monitor value.