The invention relates to an image projection device comprising: at least one LED that emits an illumination light beam, and at least one image change module comprising different images to be projected, said images being mounted on a disc coupled to a stepper motor. The device comprises an electrical control circuit configured to control the motor so as to rotate the disc in order to change the projected image, by controlling the motor with a step-change control frequency (f) which is greater than or equal to a given target frequency (fc) during a main phase (Pp), and then decreases gradually down to zero during a controlled deceleration phase (Pd).
DISPOSITIF DE PROJECTION D'IMAGES A CHANGEMENT D'IMAGE OPTIMISE
IMAGE PROJECTION DEVICE WITH OPTIMISED IMAGE CHANGE
BILDPROJEKTIONSVORRICHTUNG MIT OPTIMIERTER BILDVERÄNDERUNG
2025-01-22
Patent
Electronic Resource
French
IPC: | F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21W Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend den Gebrauch oder Einsatz von Leuchten oder Beleuchtungssystem , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien / 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 / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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