Method, apparatus and article for evaluating card games, such as blackjack

• US 6,685,568 B2
• Filed: 02/21/2001
• Issued: 02/03/2004
• Est. Priority Date: 02/21/2001
• Status: Expired due to Term

• Current Assignee: Walker Digital Table Systems LLC (Walker Innovation Inc. (f/k/a Patent Properties, Inc.))
• Original Assignee: MindPlay LLC (Light & Wonder Incorporated)
• Inventors: Soltys, Richard, Huizinga, Richard, Mouchou, Robert B.
• Primary Examiner(s): Walberg, Teresa
• Assistant Examiner(s): Brocketti, Julie K
• Application Number:
  US09/790,480
• Publication Number:
  US 20020165029A1
• Time in Patent Office: 1,077 Days
• Field of Search: 463/47, 273/149.R, 273/149.P, 273/148.A
• US Class Current: 463/47
• CPC Class Codes: A63F 1/18 Score computers; Miscellaneous indicators time-testing devices G07C
• CPC Class Codes: A63F 13/70 Game security or game management aspects
• CPC Class Codes: A63F 2009/2419 Optical
• CPC Class Codes: G07F 17/32 for games, toys, sports, or amusements
• CPC Class Codes: G07F 17/3293 Card games, e.g. poker, canasta, black jack

Abstract

A system reads an identifier from a hand of cards to identify the cards. For example, the system can read an identifier from a pair of cards forming the initial hand in blackjack, where the one card is face up and the other card is face down. The system determines the value of a hand of cards form the read identifiers. For example, the system can determine a value of an initial hand of two cards in blackjack, while only one card is face up. The system can inform a dealer of the value, or status based on value, of the hand. The system can determine whether cards forming a hand of cards are authenticate by validating the cards based on the read identifier. The system can determine if the cards forming the hand of cards are in an expected sequence based on a knowledge of the initial sequence of cards in a deck.

Claims

1. A discard card reader for reading information from an information bearing portion of one or more playing cards which comprise completed hands of playing cards, the discard card reader comprising:

a housing having a base;

a card cradle sized and dimensioned to receive one or more completed hands of playing cards, the card cradle including a card support surface sloped with respect to the base to simultaneously expose the information bearing portion of at least two of a number of playing cards supported by the card support surface; and

a reading head positioned in the housing to read information from at least some of the playing cards when supported by the card support surface.

2. The discard card reader of claim 1 wherein the reading head comprises an optical imager.

3. The discard card reader of claim 1, wherein the reading head comprises an optical imager, and further comprising:

an aperture positioned along an optical path between the optical imager and the card support surface; and

a reflector positioned along the optical path between the optical imager and the card support surface.

4. The discard card reader of claim 1, wherein the reading head comprises an optical imager, and further comprising:

a source of ultraviolet illumination; and

a filter positioned along an optical path between the optical imager and the card support surface that passes a specific range of ultraviolet light.

5. The discard card reader of claim 1 wherein the reading head comprises an optical scanner.

6. The discard card reader of claim 1 wherein the reading head comprises at least one magnetic sensor.

7. A discard card reader for reading information from an information bearing portion of one or more playing cards, the discard card reader comprising:

a housing;

means for simultaneously exposing the information bearing portion of at least two of a number of playing cards; and

means for reading information from at least some of the playing cards.

8. A discard card reader for reading information from an information bearing portion of one or more playing cards which comprise completed hands of playing cards, the discard card reader comprising:

a housing having a base;

a card cradle sized and dimensioned to receive one or more completed hands of playing cards, the card cradle including a card support surface sloped with respect to the base to simultaneously expose the information bearing portion of at least two of a number of playing cards supported by the card support surface;

a reading head positioned in the housing to read information from at least some of the playing cards when supported by the card support surface; and

an actuator coupled to create relative movement between the playing cards supported by the card support surface and the reading head.

9. The discard card reader of claim 8 wherein the actuator is coupled to the card support surface to move the card support surface.

10. The discard card reader of claim 8 wherein the actuator is coupled to the reading head to move the reading head.

11. A method of operating a discard card reader for reading information from an information bearing portion of playing cards comprising completed hands of playing cards, comprising:

receiving at least one completed hand of playing cards; and

supporting the received playing cards such that the information bearing portion of at least two of the playing cards are exposed during a same time; and

reading the exposed information bearing portion of the received playing cards.

12. The method of claim 11 wherein reading the exposed information bearing portion of the received playing cards includes:

imaging the information bearing portions;

resolving the image into a number of symbols; and

determining at least a rank of at least one card from the symbols.

13. The method of claim 11 wherein reading the exposed information bearing portion of the received playing cards includes:

imaging the information bearing portions;

resolving the image into a number of symbols; and

determining a rank and a suit of at least one card from the symbols.

14. The method of claim 11 wherein reading the exposed information bearing portion of the received playing cards includes:

imaging the information bearing portions;

resolving the image into a number of symbols;

determining an identifier of at least one card from the symbols; and

determining at least a rank of the at least one card from the identifier.

15. A method of operating a discard card reader for reading information from an information bearing portion of playing cards comprising completed hands of playing cards, comprising:

receiving at least one completed hand of playing cards;

supporting the received playing cards such that the information bearing portions of at least two of the playing cards are exposed;

incrementing a field of view of a reader to successively cover the information bearing portions of the received playing cards in a number of steps; and

reading the exposed information bearing portion of the received playing cards when the field of view is incremented in at least two of the steps.

16. The method of claim 15 wherein reading the exposed information bearing portion of the received playing cards, comprises:

forming at least one image of each of the playing cards;

resolving the image into a number of symbols; and

decoding each of the symbols.

17. The method of claim 15, further comprising:

returning the field of view of the reader to a starting position after reading a last one of the received playing cards.

18. The method of claim 15 wherein incrementing a field of view of a reader includes:

moving the received playing cards past the field of view of the reader.

19. The method of claim 15 wherein reading the exposed information bearing portion of the received playing cards, comprises:

detecting a set of magnetically encoded information from each of the received playing cards; and

decoding the set of magnetically encoded information from each of the received playing cards.