发明名称 |
Optical disk player having reduced laser output during track changes |
摘要 |
This invention relates to an optical disk recording and reproducing apparatus for recording a predetermined signal on and/or reproducing the same from a writable disk which is rotated at a constant linear velocity by using a laser from a laser source. In this case, upon reproducing the above-described signal, if a signal recorded on the inner periphery of the disk is accessed, during the period from this addressing up to the time when the linear velocity at the inner periphery of the disk becomes constant, on the basis of a spindle lock signal, the beam power of the laser from the laser source and irradiating the disk is decreased to thereby prevent useless data from being rewritten on the disk.
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申请公布号 |
US4660189(A) |
申请公布日期 |
1987.04.21 |
申请号 |
US19850714870 |
申请日期 |
1985.03.22 |
申请人 |
SONY CORPORATION |
发明人 |
TSUKAMURA, YOSHIHIRO;MORIMOTO, TOSHIRO;KUBO, MATAYASU;MUKAI, MASATAKA |
分类号 |
G11B7/004;G11B7/005;G11B7/125;(IPC1-7):G11B27/36;G11B7/00 |
主分类号 |
G11B7/004 |
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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