IC card
AssigneeSony Corporation
InventorsTatsuya Furuya, Katsunori Takahara, Hiroyuki Morioka
Life of this patent
Estimating the term…
Abstract
An IC card having a secondary battery, which causes no increase in thickness and also has excellent safety, is provided. The IC card includes an antenna coil for inducing electric power by electromagnetic induction, a thin-film battery for storing electric power induced by the antenna coil, and a control portion for controlling the storage of the electric power from the antenna coil in the thin-film battery. The thin-film battery includes a positive electrode, a negative electrode, and a solid electrolyte layer between the positive electrode and the negative electrode.
Claims12
An IC card comprising:
- an antenna coil for inducing electric power by electromagnetic induction;
- a thin-film battery for storing electric power induced by the antenna coil, wherein:
- the thin-film battery includes a positive electrode, a negative electrode, and an electrolyte between the positive electrode and the negative electrode,
- the positive electrode and the negative electrode each include a collector made of as a main component a transparent electric conductor, and
- the transparent electric conductor is an oxide of indium and tin;
- a flexible display portion for displaying information and powered by the electric power from the antenna coil in the thin-film battery;
- a control portion for controlling the display of information and the storage of the electric power from the antenna coil in the thin-film battery;
- and
- a flexible remaining-level indicator portion for visually checking a change in a color of the transparent electric conductor.
An IC card comprising:
- a solar cell;
- a thin-film battery for storing electric power generated by the solar cell, wherein:
- the thin-film battery includes a positive electrode, a negative electrode, and an electrolyte between the positive electrode and the negative electrode,
- the positive electrode and the negative electrode each include a collector made of as a main component a transparent electric conductor, and
- the transparent electric conductor is an oxide of indium and tin;
- a flexible display portion for displaying information and powered by the electric power from the solar cell in the thin-film battery;
- a control portion for controlling display of the information and the storage of the electric power from the solar cell in the thin-film battery;
- and
- a flexible remaining-level indicator portion for visually checking a change in a color of the transparent electric conductor.
Dependencies are inferred from the claim text.