Title:
ILLUMINATION DEVICE
Document Type and Number:
Japanese Patent JP2015011177
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an illumination device that enables a projected image without a change in luminance to be captured even when high-speed photographing is performed by combining with a commercial power source lighting.SOLUTION: An illumination device 1 according to the present invention comprises: a luminance measurement unit 11 that measures luminance of an object 10; a maximum luminance holding output unit 12 that holds and outputs the maximum value of luminance {B|sin(2πft+δ)|} (where f represents a frequency of a commercial power source, t represents a time, and δ represents a phase) of the object measured by the luminance measurement unit 11 when the object 10 is illuminated only by a commercial power source illumination 4 as the maximum luminance signal; a light emission signal generation unit 13 that generates a light emission signal synchronous with the commercial power source in which luminance of the object 10 to be measured by the luminance measurement unit 11 when the object 10 is independently illuminated becomes {B(1-|sin(2πft+δ)|)}; and a light emission unit that emits illumination light according to the light emission signal generated by the light emission signal generation unit 13.
Inventors:
YONEUCHI ATSUSHI
Application Number:
JP2013136426A
Publication Date:
January 19, 2015
Filing Date:
June 28, 2013
Export Citation:
Assignee:
JAPAN BROADCASTING CORP
International Classes:
G03B15/03; G03B15/05; H04N5/232; H04N5/238; H04N9/04; H05B37/02
Attorney, Agent or Firm:
Ariga Army Ichiro