The picture formation device which possesses the picture quality appraisal of the online and the method of being related

摘要

The method of being related with the electrophotography (EP) picture formation device which is appraised quantitatively the online is offered picture formation and development process. The EP picture formation device is arranged and adjoining to the photoconductor, the primary electrification vessel (118) and the exposure to light device (120) which operate, the toning station (125), the copying electrification vessel (130), possesses the fixation station (140), and the cleaner (150). As for the transmitted densitometer (165 and 170) there is a position where it adjoins to the photoconductor. The densitometer, decides with photoconductor density and the photoconductor and the density which combines the toner concerning each step region on the picture frame. Reading of density is remembered inside memory. Photoconductor density subtraction being done from the density which is combined offers the toner density which was measured, average of toner density is required next concerning each step region. The toner density which was measured or average of reading of voltage toner density of the goal regarding each step inside the step tablet or by comparison with reading of voltage, appraises the picture quality of picture formation process quantitatively. It is desirable, each picture frame on the photoconductor is appraised continually. Selective figure Figure 1