Patent ID: 8534846
Filing Date: 2013-09-17
Classification: G03B,H04N

Abstract:
1. A projection apparatus, comprising: an illuminant module; an output voltage control module, comprising a voltage transformation circuit, and being configured to output a driving voltage; an illuminant driver module, electrically connected to the output voltage control module and the illuminant module, being configured to receive the driving voltage, and to output an illuminant voltage to the illuminant module according to the driving voltage; an illuminant driver management module, electrically connected to the output voltage control module, being configured to receive the illuminant voltage, to detect a variation of the illuminant voltage, and to output a first control signal to the output voltage control module according to the variation of the illuminant voltage, such that the output voltage control module adjusts the driving voltage according to the first control signal; and a power factor correction (PFC) voltage dividing feedback circuit, electrically connected to the illuminant driver management module and the voltage transformation circuit, being configured to receive and transmit the first control signal; wherein the PFC voltage dividing feedback circuit adjusts the driving voltage outputted from the voltage transformation circuit according to the first control signal, and the voltage transformation circuit is electrically connected to the illuminant driver module and configured to receive the input voltage and to output the driving voltage to the illuminant driver module, according to the input voltage.