发明名称 |
Focus control circuit for adjusting the focus by moving a lens |
摘要 |
A focus control circuit is installed in an image pickup apparatus including a lens, a driver element for adjusting the position of the lens, and a position detecting element for detecting the position of the lens. An equalizer included in the focus control circuit generates a drive signal used to adjust the position of the lens to a position to be set, based on a difference between the position of the lens identified by the position detecting element and the set position. When an instruction to vary a target position of the lens is received externally, a position setting unit included in the focus control circuit sets sequentially a plurality of positions in a range covering a new target position and a previous target position, to the equalizer before the new target position is reached from the previous target position. |
申请公布号 |
US8131143(B2) |
申请公布日期 |
2012.03.06 |
申请号 |
US20100835360 |
申请日期 |
2010.07.13 |
申请人 |
NAGAI HIROKI;KURA TAKESHI;KAMIYA TOMONORI;SANYO SEMICONDUCTOR CO., LTD.;SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC |
发明人 |
NAGAI HIROKI;KURA TAKESHI;KAMIYA TOMONORI |
分类号 |
G03B13/36;G03B3/10 |
主分类号 |
G03B13/36 |
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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