发明名称 |
Transponder positioning aid |
摘要 |
A method for assisting with positioning of an electromagnetic transponder by a user with respect to a terminal, wherein: a current value of a ratio of the current coupling factor between the transponder and the terminal to an optimum coupling factor with a first resistive load value is calculated and stored; the current value is compared with a previous value of this ratio, stored in a previous iteration; and data elements intended for the user are controlled according to the comparison. |
申请公布号 |
US9407307(B2) |
申请公布日期 |
2016.08.02 |
申请号 |
US201214123745 |
申请日期 |
2012.04.18 |
申请人 |
STMICROELECTRONICS (ROUSSET) SAS |
发明人 |
Wuidart Luc |
分类号 |
H04Q5/22;H04B1/3816;G06K19/07 |
主分类号 |
H04Q5/22 |
代理机构 |
Seed IP Law Group PLLC |
代理人 |
Seed IP Law Group PLLC |
主权项 |
1. A method to assist a user positioning an electromagnetic transponder with respect to a terminal, comprising:
calculating by the terminal a first ratio relating a first coupling factor between the electromagnetic transponder and the terminal to a selected optimum coupling factor, the selected optimum coupling factor based on a first resistive load value; storing the calculated first ratio; controlling a variable capacitance circuit of the terminal with control information generated by a phase interval detection circuit, the phase interval detection circuit arranged to receive data representative of current flowing through a measurement element of the terminal, the current flowing through the measurement element of the terminal corresponding to a current coupling factor between the electromagnetic transponder and the terminal; calculating by the terminal a current ratio relating the current coupling factor between the electromagnetic transponder and the terminal to the selected optimum coupling factor; comparing by the terminal said current ratio with said first ratio; and controlling at least one output data element according to said comparison. |
地址 |
Rousset FR |