| 发明名称 | Heater control device, fixing device, and image forming apparatus | ||
| 摘要 | A heater control device that performs phase control of AC power and supplies phase-controlled power to a heater, the heater control device including: a control unit configured to, in the phase control, gradually increase an on-duty ratio until a target power amount is supplied to the heater; and a judgment unit configured to judge whether or not the on-duty ratio is within a predetermined range of on-duty ratios including a 50% on-duty ratio. The control unit (i) increases the on-duty ratio by a first amount while the on-duty ratio is within the predetermined range, and (ii) increases the on-duty ratio by a second amount while the on-duty ratio is not within the predetermined range. The first amount is greater than the second amount. | ||
| 申请公布号 | US8938178(B2) | 申请公布日期 | 2015.01.20 |
| 申请号 | US201314028664 | 申请日期 | 2013.09.17 |
| 申请人 | Konica Minolta, Inc. | 发明人 | Tanaka Toshiaki;Ishihara Yasuhiro;Sasaki Kosuke |
| 分类号 | G03G15/00;G03G15/20 | 主分类号 | G03G15/00 |
| 代理机构 | Buchanan Ingersoll & Rooney PC | 代理人 | Buchanan Ingersoll & Rooney PC |
| 主权项 | 1. A heater control device that performs phase control of AC power and supplies phase-controlled power to a heater, the heater control device comprising: a control unit configured to, in the phase control, gradually increase an on-duty ratio until a target power amount is supplied to the heater; and a judgment unit configured to judge whether or not the on-duty ratio is within a predetermined range of on-duty ratios including a 50% on-duty ratio, wherein the control unit (i) increases the on-duty ratio by a first amount while the on-duty ratio is within the predetermined range, and (ii) increases the on-duty ratio by a second amount while the on-duty ratio is not within the predetermined range, the first amount being greater than the second amount. | ||
| 地址 | Chiyoda-Ku, Tokyo JP | ||