| 摘要 |
<p>PURPOSE:To improve the reliability of a data read, to reduce the size of a data reader, and to save electric power, by setting a data read part accurately at a data read position regardless of the kind of a carrier. CONSTITUTION:The data read part is set preferentially where data is read preferably according to the frequencies of use of optical recording media T' and C' of a tag T and a card C. When data is read out of other carriers, the data read part is changed in position properly. Therefore, the data is read on invariably the best condition according to the kind of the carrier.</p> |
