Infrared optical card having an opaque case for hiding internal components

• US 5,196,682 A
• Filed: 05/31/1989
• Issued: 03/23/1993
• Est. Priority Date: 06/30/1986
• Status: Expired due to Fees

• Current Assignee: Wang Laboratories Incorporated
• Original Assignee: Wang Laboratories Incorporated
• Inventors: Englehardt, Gary A.
• Primary Examiner(s): Shepperd, John
• Application Number:
  US07/363,421
• Time in Patent Office: 1,392 Days
• Field of Search: 342/42, 342/44, 342/51, 342/53, 364/200, 235/379, 235/454, 235/441, 235/439, 235/492, 235/455, 235/491, 235/468, 358/194.1, 359/142, 359/143, 359/152, 250/271, 250/340, 250/341
• US Class Current: 235/454
• CPC Class Codes: G01D 9/005 Solid-state data loggers
• CPC Class Codes: G06K 7/1097 Optical sensing of electronic memory record carriers, such as interrogation of RFIDs with an additional optical interface

Abstract

A portable data storage card is provided for storing and carrying digital data to be accessed or modified at fixed locations. The pocket-sized card has a durable sealed case, devoid of electrical connectors. Data is stored in an internal Electrically Erasable PROM, which includes memory control circuitry. The card is inserted into a reader/programmer at a fixed location and receives power from an inductive source in the reader/programmer by means of an internal coil. Data transfer between the card and the external reader/programmer unit is effected by infrared optoelectronic devices, through the case of the card, which is transmissive to infrared light. The reader/programmer controls a user'"'"'s access to the data stored on the card, requiring a user to supply a secure identification code to access the stored data. The case is opaque to visible light in order to hide the components from view.

Claims

1. A secure portable data storage device for use with an external data reading apparatus, comprising

a sealed case;

memory means, within the sealed case, for storing data, the memory means including an internal serial communications processor providing a bidirectional data transfer protocol for facilitating the output of data from the memory means in response to a clock signal and read command received from an external data reading apparatus;

infrared optoelectronic means for exchanging infrared optical signals between the data storage device and the data reading apparatus consisting of

first light receiving means for receiving light pulses representing clock pulses and providing the clock signals therefrom;

second light receiving means for receiving light pulses representing read commands and providing the read commands therefrom;

light providing means for receiving the output data from the memory means and producing light pulses representing the output data;

the infrared optoelectronic means predeterminately disposed within the sealed case for precise alignment with complementary infrared optoelectronic means in the external data reading apparatus; and

the sealed case being transmissive to infrared light but opaque to visible light so that the predetermined disposition of the optoelectronic means within the sealed case is obscured from visual inspection, to provide enhanced security.

2. A secure portable data storage device as recited in claim 1 further comprising:

a secondary inductive coil predeterminately disposed within the case for precise alignment with a complementary primary coil in the external data reading apparatus, so that, upon energizing the primary coil, a current is induced in the secondary coil for providing operating power to the data storage device;

wherein the predetermined disposition of the primary coil within the sealed case is obscured from visual inspection and the portable data storage device is operational only when the secondary coil is precisely aligned with the complementary primary coil.

3. A secure portable data storage device as recited in claim 1 wherein:

the bidirectional protocol further facilitates the input of data into the memory means in response to a clock signal and write command; and

the second light receiving means further receives light pulses representing write commands and data therefrom to the memory means.

4. Data reading apparatus for reading data stored in a portable data storage device which includes

a sealed case;

memory means for the storage of data, said memory means including an internal serial communications processor providing a bidirectional data transfer protocol for facilitating the output of data from the memory means in response to a clock signal and read command received from an external data reading apparatus;

infrared optoelectronic means for exchanging infrared optical signal between the data storage device and the data reading apparatus consisting of first light receiving means for receiving light pulses representing clock pulses and providing the clock signals therefrom;

second light receiving means for receiving light pulses representing read commands and providing the read commands therfrom;

light providing means for receiving the output data from the memory means and producing light pulses representing the output data;

the infrared optoelectronic means predeterminately disposed within the sealed case for precise alignment with complementary infrared optoelectronic means in the external data reading apparatus; and

the sealed case being transmissive to infrared light but opaque to visible light so that the predetermined disposition of the optoelectronic means within the sealed case is obscured from visual inspection, to provide enhanced security;

the data reading apparatus comprising;

alignment means for aligning the portable data storage device and the optoelectronic means contained therein in a predetermined disposition relative to complementary optoelectronic means contained in said reading apparatus;

clock providing means for providing light pulses representing clock signal to the first light receiving means when the portable data storage device is aligned in the predetermined disposition;

second light providing means for providing the light pulses representing the read commands to the second light receiving means when the portable data storage device is aligned in the predetermined disposition;

third light receiving means for receiving the light pulses representing the output data when the portable data storage device is aligned in the predetermined disposition, and for converting the received light pulses into digital data; and

controlling means for providing the clock signal and read commands, and for interpreting the digital output data produced by the portable data storage device.

5. Data reading apparatus as recited in claim 4 further comprising:

a primary inductive coil predeterminately disposed within the data reading apparatus for precise alignment with a complementary secondary coil in the portable data storage device, so that, upon energizing the primary coil, a current is induced in the secondary coil for providing operating power to the data storage device;

wherein the predetermined disposition of the secondary coil within the sealed case is obscured from visual inspection and the portable data storage device is operational only when the secondary coil is precisely aligned with the complementary primary coil.

6. Data reading apparatus as recited in claim 4, wherein:

the bidirectional protocol further facilitates the input of data into the memory means in response to a clock signal and write command; and

the controlling means further provides data to be stored in the memory means and write commands for controlling the storing of said data; and

the second light providing means receives the data and write commands and produces light pulses representing the data and write commands therefrom.