发明名称 |
Image reading apparatus and control method thereof |
摘要 |
To control a light emitted from a fluorescent lamp having phosphors with different afterglow properties for different colors, a center of a lighting control signal for controlling the lighting of the fluorescent lamp is controlled to constantly align with the center of a Hsync period so that despite the variation of the lighting time of the fluorescent lamp, a barycenter of the quantity of light from the fluorescent lamp in the Hsync period almost aligns with the center of the Hsync period to reduce the offset of the barycenter.
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申请公布号 |
US6757084(B2) |
申请公布日期 |
2004.06.29 |
申请号 |
US19990377562 |
申请日期 |
1999.08.19 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
KURITA MITSURU;SATO HIROSHI;ARAI KOJI;ISHIMOTO KOICHI;IKEDA TARO;SUGIURA TAKASHI |
分类号 |
H04N1/40;H04N1/48;(IPC1-7):H04N1/46 |
主分类号 |
H04N1/40 |
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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