发明名称 |
Light-source control device, light-source control method, image reading device, and image forming apparatus |
摘要 |
A light-source control device includes a light source including a first light emitter for emitting light and a second light emitter for emitting light due to the light emitted by the first light emitter; a constant current unit configured to maintain a current constant that is input via the light source from a power supply; a switching unit configured to switch the current to be input to the constant current unit at a designated duty ratio and cycle; and a control unit configured to control the current applied to the light source so that a rise transition time and a fall transition time of the current applied to the light source are nearly equal to each other. |
申请公布号 |
US8711444(B2) |
申请公布日期 |
2014.04.29 |
申请号 |
US201213420829 |
申请日期 |
2012.03.15 |
申请人 |
OYAMA TADAAKI;RICOH COMPANY, LIMITED |
发明人 |
OYAMA TADAAKI |
分类号 |
H04N1/04 |
主分类号 |
H04N1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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