发明名称 |
Laser controller for heat-assisted magnetic recording device |
摘要 |
According to one embodiment, there is provided a magnetic disk device including a light source, a light irradiation element, and a controller. The light irradiation element is configured to receive light from the light source to irradiate light onto a magnetic disk. The controller is configured to switch between a first control and a second control according to a pulse width of data to be written onto the magnetic disk. The first control keeps an output of the light source at a first value. The second control makes the output of the light source change periodically between the first value and a second value lower than the first value. |
申请公布号 |
US9093085(B1) |
申请公布日期 |
2015.07.28 |
申请号 |
US201414336610 |
申请日期 |
2014.07.21 |
申请人 |
Kabushiki Kaisha Toshiba |
发明人 |
Isokawa Hiroshi |
分类号 |
G11B11/00;G11B7/1263;G11B11/105 |
主分类号 |
G11B11/00 |
代理机构 |
White & Case LLP |
代理人 |
White & Case LLP |
主权项 |
1. A magnetic disk device comprising:
a light source; a light irradiation element configured to receive light from the light source to irradiate light onto a magnetic disk; and a controller configured to keep an output of the light source at a first value when a first time from an edge timing of pulse of data to be written onto the magnetic disk until a next edge timing is less than a first threshold, and to change the output of the light source from the first value to a second value lower than the first value when the first time is greater than or equal to the first threshold. |
地址 |
Minato-ku, Tokyo JP |