Patent ID: 9569914
Date: 2017-02-14
CPC Classifications: G07F

Claim:
1. A slot machine comprising: a display configured to display a video in a mode of scrolling and stopping a variable subsequence of a sequence of symbols for a symbol rearrangement in a respective unit game, the symbols, each of which has a background color and a symbol image different from other symbol images, including a WILD symbol, comprising a plurality of kinds of images, and arranged in a predetermined order in the sequence; a validator; at least one acceptor configured to receive tangible game media; an award payout mechanism by which the tangible game media can be paid out to a player or credited to current credits of the player as an outcome of the unit game; a display control circuit configured to generate a video signal of the variable subsequence to be displayed on the display; and a controller, which, via the validator, identifies the tangible game media that has been added to the slot machine; which establishes a credit balance for the player based at least in part on the game media that has been added to the slot machine; and which is configured to, as a result of the player having wagered the tangible game media, wherein the controller is further configured to drive the display control circuit to generate an effect video signal of an effect image in a mode of inserting an additional WILD symbol between two of the symbols of the variable subsequence for a reconstruction of the sequence of symbols upon satisfaction of a condition for a start of a feature game by the symbols rearranged in the respective unit game, drive the display to display the effect image on the display before the start of the feature game on the basis of the effect video signal, detect positions of the one or more consecutive symbols immediately downstream the WILD symbols in the scrolling direction on the basis of the positions of the WILD symbols in the reconstructed sequence of symbols, drive the display control circuit to regenerate, on the basis of the detected positions, the effect video signal of the variable subsequence of the reconstructed sequence of symbols, the variable subsequence of the reconstructed sequence of symbols including the one or more consecutive symbols having the predetermined background color different from the background colors of the remaining symbols of the reconstructed sequence, and drive the display to display the one or more consecutive symbols with the predetermined background color different from the background colors of the remaining symbols of the reconstructed sequence on the basis of the effect video signal of the variable subsequence of the reconstructed sequence of symbols regenerated by the display control circuit when the one or more consecutive symbols are displayed on the display during the feature game, wherein the display control circuit includes: an image data memory configured to store image data on the symbols; a palette circuit configured to set color information on background images of the symbols; a screen circuit configured to set the background colors of the symbols based on the color information on the background images; and an image data processor configured to generate the video signal of the variable subsequence on the symbols based on the image data and the background colors.