Lighting device, light apparatus, and signboard apparatus

Lighting device, light apparatus, and signboard apparatus

A lighting device includes: a drive circuit that supplies power to a light source; a switch connected in series with the light source; and a controller that controls pulse modulation for visible light communication executed through switching ON and OFF of the switch in a first interval, and stops th...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Hayashi Yohei, Kido Shojirou
Format: Patent
Sprache:eng
Schlagworte:
ADVERTISING
CRYPTOGRAPHY
DISPLAY
DISPLAYING
EDUCATION
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
LABELS OR NAME-PLATES
PHYSICS
SEALS
SIGNS
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Beschreibung
Zusammenfassung:A lighting device includes: a drive circuit that supplies power to a light source; a switch connected in series with the light source; and a controller that controls pulse modulation for visible light communication executed through switching ON and OFF of the switch in a first interval, and stops the pulse modulation in a second interval. The controller controls a peak value, which is a high value of a pulsed current supplied from the drive circuit to the light source, to match an average current value in the first interval with an average current value in the second interval.