CPC H04N 9/3155 (2013.01) [H04N 9/3188 (2013.01); H04N 9/3191 (2013.01)] | 9 Claims |
1. A self-adaptive adjustment method for brightness of a projection apparatus, comprising:
S11: collecting an ambient illuminance value and a projection distance value of the projection apparatus;
collecting the ambient illuminance value in S11 comprises:
S1111: projecting an nth frame of projected image, wherein n is a positive integer;
S1112: collecting the ambient illuminance value at least twice in a projection gap period;
S1113: determining whether n is larger than a preset number of projected frames, proceeding to S1114 under the condition that n is larger than the preset number of projected frames, and n=n+1 and returning to S1111 under the condition that n is not larger than the preset number of projected frames; and
S1114: computing a trimmed mean of all collected ambient illuminance values, so as to obtain a final ambient illuminance value;
S12: computing a projection plane illuminance value of the projection apparatus according to a relation function, an acquired ambient illuminance value and the projection distance value of the projection apparatus, wherein the relation function is a function between the projection plane illuminance value and the ambient illuminance value as well as the projection distance value; and
S13: adjusting brightness of the projection apparatus according to the projection plane illuminance value of the projection apparatus.
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