| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely obtain the toner consumption in an image forming apparatus. <P>SOLUTION: On the basis of a video signal, a toner dot counter 202 and an off dot counter 201 detect a size of a toner dot portion to carry an adherent toner thereto and a size of an off dot portion not to carry an adherent toner respectively. Reference is made to a look-up table 203 from the detection results, so as to retrieve a coefficient Kv corresponding to a combination of the sizes of the toner dot portion and the off dot portion. A count value Cdot given by the toner dot counter 202 is multiplied by the coefficient Kv, while the resultant product is integrated by an accumulator 205. An integration value for an image of one page is multiplied by a coefficient K0 equivalent to a toner adhesion percentage of solid image. Thus a toner consumption TC on the page is determined. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
