摘要:
Even in the bound form of a document composed of document sheets, the tag information on each document sheet can be read. When the documents sheet are printed by two-sided printing, the tag information on each page of the document sheet can be read by detecting the front and back of the sheet in a simple manner. Information is exchanged between a wireless IC tag (1) and a reader upon receipt of a radio wave from the reader. When a received right signal is obtained by receiving an outside light, no response to the reader is sent to depending on the received light signal. The tag information to be exchanged includes, as its part, the received light information corresponding to the received light signal. With this, even if only such a single wireless IC tag is used, by changing the direction of the illuminating light which is an outside light to the document sheet provided with the tag, the tag information can be changed for each direction of the illuminating light correspondingly to the number of directions in any one of which the outside light can be received.
摘要:
A printed sheet can be treated safely and conveniently in accordance with the degree of its content confidentiality as to secret information limited to distribution, duplication, etc. and non-confidential information. A sheet is provided with an IC tag and further machine identifiably expressed pattern information is added and printed as a key necessary to access the information stored at the IC tag to be a printed sheet. Thus, the secret information can be conveniently distributed together with information disclosed by printing while being kept safely in the IC tag, and cannot be accessed unless the printed sheet is available. Further, since the expressed pattern information is made to have an access level to secret information, the access to secret information can be set in accordance with the degree of confidentiality.
摘要:
Even in the bound form of a document composed of document sheets, the tag information on each document sheet can be read. When the documents sheet are printed by two-sided printing, the tag information on each page of the document sheet can be read by detecting the front and back of the sheet in a simple manner. Information is exchanged between a wireless IC tag (1) and a reader upon receipt of a radio wave from the reader. When a received right signal is obtained by receiving an outside light, no response to the reader is sent to depending on the received light signal. The tag information to be exchanged includes, as its part, the received light information corresponding to the received light signal. With this, even if only such a single wireless IC tag is used, by changing the direction of the illuminating light which is an outside light to the document sheet provided with the tag, the tag information can be changed for each direction of the illuminating light correspondingly to the number of directions in any one of which the outside light can be received.