Code reader
AssigneeNokia Corporation
InventorsAntti Kemppainen, Esko Strommer, Heikki Huomo, Raimo Korhonen
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Abstract
A method for reading a code, which code comprises code elements and the first part of the code elements is substantially conductive and the conductivity of the second part is substantially different from that of the first part, in which method the reader couples to the code in a capacitive manner, in which case the signal level of the signal formed by the reader varies according to the conductivity of the code element, and a correction factor is determined of at least one code element for correcting the signal. In addition, the invention relates to a code reader and electric ink.
Claims48
A method for reading a code, which code comprises code elements and the first part of the code elements is substantially conductive and the conductivity of the second part is substantially different from that of the first part, in which method the reader couples to the code in a capacitive manner, in which case the signal level of the signal formed by the reader varies according to the conductivity of the code element, wherein a correction factor is determined of at least one code element for correcting the signal.
A code reader for reading a code, which code comprises code elements, and the first part of the code elements is substantially conductive and the conductivity of the second part is substantially different from that of the first part, and the code reader is
- arranged to couple to the code in a capacitive manner, and
- arranged to form a signal, whose signal level varies according to the conductivity of the code element,
- wherein the code reader in addition comprises a member, which is arranged to determine a correction factor for correcting the signal.
A mobile device, which comprises a code reader for reading a code, which code comprises code elements, and the first part of the code elements is substantially conductive and the conductivity of the second part is substantially different from that of the first part, and the code reader is
- arranged to couple to the code in a capacitive manner, and
- arranged to form a signal, whose signal level varies according to the conductivity of the code element,
- wherein the code reader in addition comprises a member in connection with the sensor head, which is arranged to determine a correction factor for correcting the signal.
A conductive ink, which determines a code, which comprises code elements in such a manner that the first part of the code element is substantially conductive and the conductivity of the second part is substantially different from that of the first part, which code determined by the ink is arranged to couple in a capacitive manner to the reader in order to vary the signal level of the signal according to the conductivity of the code element in the reader, wherein a correction factor for correcting the signal can be determined from the code element made of the ink.
Dependencies are inferred from the claim text.