| 摘要 |
PROBLEM TO BE SOLVED: To display sufficient gradation expressing ability without causing the reduction of an S/N ratio. SOLUTION: A white reference plate provided in a device is read by the respective kinds of irradiation of three color kinds of light emitting diodes in a light source part 11 and the outputs of the respective colors in the photoelectric converter 13 at this time are compared by CPU 25. At the time of difference in comparison, its charge storing time, the light emitting time of the light emitting diodes or the both charge storing time and light emitting time are adjusted by a signal from a control signal generating part 27 so as to permit the outputs of the respective colors in the photoelectric converter to be uniform. |
