EP0498582A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
IC card information read/write system
Assignee: NEC Corp
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Filing: 1992-01-31
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Granted: —
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Expires: 2012-01-31
Abstract
Abstract An IC card information read/write system is constituted with an IC card (2) and a read/write apparatus (1). The IC card includes a solar cell (25) and an LCD (24), whereas the card read/write apparatus includes a light source (6) and a photosensor (7). In an information write operation, a light emitted from the light source is sensed by the solar cell. In an information read operation, an emission light from the light source is irradiated onto a pattern presented on the LCD so as to sense a reflection light or a transmission light thereof by the photosensor. Data communication can be achieved between the IC card and the read/write apparatus without necessitating any mechanical contact therebetween.
Inventors
- 👤 Masaki C/O Nec Corporation Ichihara
- 👤 Naoto C/O Nec Corporation Hatakeyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0701; G06K19/0702; G06K19/0704; G06K19/0723; G06K19/0728; G06K19/077; G06K19/07749; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/1097
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
An IC card information read system for reading information from an IC card comprising: an IC card; and an IC card read apparatus, said IC card including: first information processing means for reading information stored in storage means integrally disposed in said IC card and processing the information; an LCD driver means for converting data processed by said first information processing means into a driving signal of LCD means; and LCD means responsive to the driving signal for presenting thereon a display pattern, said IC card read apparatus including: first photosensor means for optically reading the display pattern presented by said LCD means of said IC card; signal converter means for converting into a data signal an electric signal produced by said first photosensor means; and second information processing means for processing the data signal.
Claim 2
Dependent Claim
34 words
A system as claimed in claim 1, wherein: said LCD means includes a liquid crystal of a reflection light read type; and said first photosensor means reads a reflection light from said LCD means.
Claim 3
Dependent Claim
34 words
A system as claimed in claim 1, wherein: said LCD means includes a liquid crystal of a transmission light read type; and said first photosensor means reads a transmission light from said LCD means.
Claim 4
Dependent Claim
161 words
An IC card information write system for writing information in an IC card comprising: an IC card write apparatus, and an IC card; and said IC card write apparatus including: third information processing means for generating from information received from an external device information to be written in said IC card; light source driver means for generating a driving signal associated with the write information produced from said third information processing means; and a light source for blinking a light therefrom according to the driving signal, said IC card including: second photosensor means for receiving light emitted from said light source and converting the light into an electric power; signal sensor means for sensing a blinking of a light superimposed on to the output from said second photosensor means; fourth information processing means for receiving information sensed by said signal sensor means and processing the information; and storage means for storing therein the information processed by said fourth information processing means.
Claim 5
Dependent Claim
36 words
A system as claimed in claim 4, wherein said IC card further includes power supply means for supplying the electric power produced by said second photosensor means to said storage means and said signal sensor means.
Claim 6
Dependent Claim
16 words
A system as claimed in claim 4, wherein said second photosensor means is a solar cell.
Claim 7
Dependent Claim
19 words
A system as claimed in claim 5, wherein said power supply means includes a diode and a smoothing capacitor.
Claim 8
Dependent Claim
39 words
A system as claimed in claim 5, wherein the driving signal generated from said light source driver means sets said light source to on when the light is not blinking, thereby supplying an internal power to the IC card.
Claim 9
Dependent Claim
212 words
An IC card information read/write system comprising: an IC card; and an IC card read/write apparatus, said IC card including: second photosensor means for receiving a light representing a signal and converting the light into an electric power; signal sensor means for sensing a blinking of a light superimposed onto an output from said second photosensor means; storage means for storing therein information sensed by said signal sensor means; control means for controlling a read operation and a write operation which are conducted in said storage means; LCD driver means for converting data read from said storage means into a driving signal of LCD means; and LCD means for presenting thereon a display pattern associated with the driving signal, said IC card read/write apparatus including: first photosensor means for optically reading the display pattern presented on said LCD means; signal converter means for converting into a data signal an electric signal sensed by said first photosensor means; control means for controlling the data signal from said signal converter means and a signal to be written in said IC card; light source driver means for generating a driving signal associated with the write information outputted from said control means; and a light source for blinking a light therefrom depending on the driving signal.
Claim 10
Dependent Claim
81 words
A system as claimed in claim 9, wherein after said IC card is attached onto said IC card read/write apparatus: said IC card read/write apparatus transfers an instruction for an information read or write operation via said light source to said IC card; and said IC card stores, in response to the instruction, information from said IC card read/write apparatus in said storage means or transfers information stored in said storage to said IC card read/write apparatus via said LCD means.
Claim 11
Dependent Claim
16 words
A system as claimed in claim 9, wherein said second photosensor means is a solar cell.
Claim 12
Dependent Claim
16 words
A system as claimed in claim 10, wherein said second photosensor means is a solar cell.
References Cited (Backward Citations)
No citation records indexed.
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