{HEAD ~ The inventor} of the present invention has realized that, it usually takes a certain time period, such as {TAIL ~ about one minute} and half, for the projector apparatus to turn off its power when a user instruction for turning off the power is received 
{ HEAD ~ The inventor } of the present invention has realized that , it usually takes a certain time period , such as { TAIL ~ about one minute } and half , for the projector apparatus to turn off its power when a user instruction for turning off the power is received
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH