Broadband light (Bs) emitted by broadband light emitting diodes (231a,- 231c) which use mass production products with extremely little variation in brightness between individual units for light emitting diode chips is converted to R (red), G (green), B (blue) light (Br, Bg, Bb) by color converters (232a - 232c). The brightness balance for the light (Br, Bg, Bb) is adjusted by a controller (30) by means of duty ratios for pulse signals applied to the broadband light emitting diodes (231a - 231c), and light (B) of a desired emission color is obtained. The brightness balance of the light (Br, Bg, Bb) is determined unambiguously by a combination pattern for the duty ratios of the pulse signals; therefore, the desired emission color (B) can be obtained without fine adjustment operations.
Multiple color light source device
06.01.2016
Patent
Elektronische Ressource
Englisch
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
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