| 摘要 |
PURPOSE:To increase a binary-coded margin against a red original, and to improve quality, by simultaneously turning on and using 2 light emission diode arrays of green and yellow. CONSTITUTION:In original sheet reader light sources 10, 11 placed in 2 rows by placing a photoconductive system 8 between them, of an original sheet reader constituted by providing a light source, the photoconductive system and a photodetector array 9, one row of the light sources consists of a green light emission diode array 10, and the other row consist of a yellow light emission diode array 11. A binary-coded margin can be increased by adjusting an input current so as to make intensity of illumination from both the light sources 10, 11 the same, turning them on simultaneously, and illuminating an original. |
