カラー電子写真におけるドットイレースによる色再現性向上

抄録

It is known that the value of gamma in tone reproduction of electrophotography is far larger than unity though the condition of gamma = 1 is preferable for the purpose of high fidelity in color electrophotography.
An improvement of tone reproduction in electrophotography is proposed in this paper where some of the latent image charges are discharged by the irradiation of fine dot pattern light from a LED array. The decrease in toner deposition due to the above dot erasing will give the decrease in the gamma value of tone reproduction. In the above case, however, there may exist the decrease in color purity and that in saturation value of optical density. It is expected that these decreases in color purity and saturation density may be prevented by the decrease in dot size and the increase in toner spread during the process of fixing.