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Examination element and examination container

  • US 9,341,577 B2
  • Filed: 02/05/2015
  • Issued: 05/17/2016
  • Est. Priority Date: 09/13/2006
  • Status: Active Grant
First Claim
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1. An examination element comprising:

  • an antenna;

    a reagent portion;

    a sensor configured to detect a change of color or a colored degree of the reagent portion;

    a semiconductor device configured to transmit a wireless signal corresponding to data detected by the sensor from the antenna;

    a battery electrically connected to the sensor and the semiconductor device;

    a charge circuit configured to charge the battery using an electric power generated from a wireless signal received by the antenna, the charge circuit comprising a constant current source and a switch circuit; and

    a charge control circuit electrically connected to the switch circuit and the battery;

    wherein a first terminal of the switch circuit is electrically connected to the constant current source,wherein a second terminal of the switch circuit is electrically connected to the battery,wherein the charge control circuit is configured to output low-level potential to a third terminal of the switch circuit so that the first terminal of the switch circuit is electrically connected to the second terminal of the switch circuit when the battery is not overcharged, andwherein the charge control circuit is configured to output high-level potential to the third terminal of the switch circuit so that the first terminal of the switch circuit is not electrically connected to the second terminal of the switch circuit when the battery is overcharged.

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