Contactless and intelligence-wise code identification chip system

• US 6,837,440 B2
• Filed: 05/15/2003
• Issued: 01/04/2005
• Est. Priority Date: 10/03/2002
• Status: Active Grant

• Current Assignee: Winbond Electronics Corporation
• Original Assignee: Winbond Electronics Corporation
• Inventors: Lin, Chun-Ping
• Primary Examiner(s): Frech, Karl D.
• Assistant Examiner(s): Labaze, Edwyn
• Application Number:
  US10/439,352
• Publication Number:
  US 20040065730A1
• Time in Patent Office: 600 Days
• Field of Search: 235492-493, 235/375, 235/380, 235/449, 235/451, 235/487, 235/488, 455 301- 305, 340 101- 104
• US Class Current: 235/492
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10059 transponder driven

Abstract

The present invention provides a kind of contactless and intelligence-wise code identification chip system. The contactless and intelligence-wise code identification chips have an identification code respectively. The chips can generate a random number to select one of time slots for allocating said identification code. The contactless and intelligence-wise code reader can read the identification code from time slots by the polling method.

Claims

1. A contactless and intelligence-wise code identification chip system, said chip system transferring an identification code by a plurality of time slots and comprising:

a plurality of contactless and intelligence-wise code identification chips including said identification code and being able to generate a random number, said random number being used to select one of said time slots for allocating said identification code; and

a contactless and intelligence-wise code reader for reading said identification code from said plurality of time slots by a polling method;

wherein at least two contactless and intelligence-wise code identification chips having the same identification code.

2. The chip system according to claim 1 wherein said contactless and intelligence-wise code identification chip is induced by a magnetic field energy, and transfers said identification code to said contactless and intelligence-wise code reader.

3. The chip system according to claim 1 wherein said random number is an integer among 0 to N, and N is an integer larger than 1.

4. The chip system according to claim 1 wherein an interval of said time slot is 2 ms.

5. The chip system according to claim 1 wherein said contactless and intelligence-wise code reader reads said identification code from said plurality of time slots by said polling method at least once.

6. The chip system according to claim 1 wherein said contactless and intelligence-wise code reader also includes a memory unit to record said time slot and said identification code.

7. The chip system according to claim 6 wherein said contactless and intelligence-wise code reader also includes an output unit to output a content of said memory unit.

8. A method for identifying a contactless and intelligence-wise code identification chip, said method providing a plurality of contactless and intelligence-wise code identification chips to transfer an identification code by a plurality of time slots, and comprising steps of:

generating a random number by said contactless and intelligence-wise code identification chip, said random number being used to select one of time slots for allocating said identification code; and

reading said identification code from said plurality of time slots by said contactless code reader with a polling method;

wherein at least two contactless and intelligence-wise code identification chips having the same identification code.

9. The method according to claim 8 wherein said contactless and intelligence-wise code identification chip is induced by a magnetic field energy, and transfers said identification code to said contactless and intelligence-wise code reader.

10. The method according to claim 8 wherein said random number is an integer among 0 to N, and N is an integer larger than 1.

11. The method according to claim 8 wherein the interval of said time slot is 2 ms.

12. The method according to claim 8 wherein said contactless and intelligence-wise code reader reads said identification code from said plurality of time slots by said polling method at least once.

13. The method according to claim 8 wherein the contactless and intelligence-wise code reader also includes a memory unit to record said time slot and said identification code.

14. The method according to claim 13 wherein said contactless and intelligence-wise code reader also includes an output unit to output the content of said memory unit.