| 发明名称 | Power supply device and image forming apparatus having the same | ||
| 摘要 | Power supply device and an image forming apparatus having the power supply device are provided. The power supply device includes an input unit to input alternating current (AC) power, a converter to convert the input AC power to direct current (DC) power having a preset level and to output the DC power, and a sensor to be connected to the input unit in parallel and to sense whether the AC power has been input. The sensor includes a transformer to receive the AC power and to output a sensing signal having a level reduced more than a level of the AC power, and a resistor unit connected to the transformer in series so that a current of the AC power input into the transformer is lower than or equal to a preset current. | ||
| 申请公布号 | US9075546(B2) | 申请公布日期 | 2015.07.07 |
| 申请号 | US201213684900 | 申请日期 | 2012.11.26 |
| 申请人 | SAMSUNG ELECTRONICS CO., LTD. | 发明人 | Jeong An-sik |
| 分类号 | G06K15/00;G03G15/00;H02J9/00;G01R1/30;G01R19/00;G01R19/15;G06F3/12 | 主分类号 | G06K15/00 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. A power supply device, comprising: an input unit to input alternating current (AC) power; a converter to convert the input AC power to direct current (DC) power having a preset level and to output the DC power; and a sensor to be connected to the input unit in parallel and to sense whether the AC power has been input, the sensor including: a transformer to receive the AC power and to output a sensing signal having a level reduced more than a level of the AC power; anda resistor unit connected to the transformer in series so that a current of the AC power input into the transformer is lower than or equal to a preset current, wherein the sensing signal is a signal which is electrically insulated from the AC power. | ||
| 地址 | Suwon-Si KR | ||