Patent ID: 8777423
Filing Date: 2014-07-15
Classification: G03B

Abstract:
1. A projector comprising: a projection light source; a light-off detector that detects that the projection light source has transitioned from an “on” state to an “off” state; a relighting controller that carries out a relighting process for relighting the projection light source each time the light-off detector detects that the projection light source has transitioned from the “on” state to the “off” state for a maximum process number of times N (N is an integer greater than or equal to two) up to which the relighting process can be carried out; and a storage unit that stores the maximum process number N, wherein the relighting controller counts the number of relighting processes carried out for a maximum of N times, and wherein, when the light-off detector detects the (N+1)-th transition from the “on” state to the “off” state, the relighting controller carries out error notification based.