| 摘要 |
PURPOSE:To control the gradation level of a pattern and form a toned pattern, by controlling the size of pattern elements constituting a pattern. CONSTITUTION:Video signals from R, G, B are inputted into sample-and-hold circuits SHR, SHG, SHB, and a synchronizing signal SYNC is inputted into a system controller to sample and hold the video signals. Outputs of respective color video signals are stored in line memories MR, MG, MB. This information is subjected to a masking treatment and a ground color removing treatment by a matrix circuit MX, and respective signals of cyan C, magenta M, yellow Y and black BL are outputted. The thus outputted signals are stored in latch memories MC, MM, MY, MBL and are inputted into head-controlling matrix circuits MXC and the like. These signals are converted into code signals, which are converted into analog voltages, which are inputted into head drivers AMP1- 8, and the recording heads are driven by a timing signal TP to control the quantity of ejected ink droplets. |
