Patent ID: 8632391
Filing Date: 2014-01-21
Classification: G07F

Abstract:
1. A card game machine comprising: a mat including a plurality of first RF chips and a plurality of reader/writers arranged in an (M, N) matrix including M rows and N columns; a control device; a communication terminal configured to communicate with the control device via an antenna included in the control device; and a first card including a second RF chip and a second card including a third RF chip, wherein the plurality of reader/writers are connected to the second RF chip and the third RF chip wirelessly to perform wireless communication with the control device via any of the plurality of reader/writers, wherein one of the plurality of first RF chips is positioned at a center between one of the plurality of reader/writers at (p, q) (p is greater than or equal to 1 and less than or equal to M−1 and q is greater than or equal to 1 and less than or equal to N) and another one of the plurality of reader/writers at (p+1, q), wherein the plurality of first RF chips are configured to transmit and receive a wireless signal using the plurality of reader/writers from the second RF chip and the third RF chip and detect a signal strength of the wireless signal, wherein the control device is configured to determine a type, an orientation and a position of each of the first card and the second card from the detected signal strength at the same time, wherein the control device is connected to the plurality of reader/writers, wherein the communication terminal is connected to an external network, and wherein the first card and the second card are used for a card game of the card game machine.