Method of and an apparatus for displaying a picture

A game which displays pictures on a screen comprising:

• a cathode ray tube having said screen, beam producing means, and beam deflecting means,
• a central processing unit with memory means programmed to function as a game,
• a console for controlling said central processing unit,
• means for feeding scanning signals to said beam deflecting means for producing a scanning path comprising a first spiral path at one location on said screen and a second spiral path at another location on said screen with the scan of the second spiral path being subsequent to the scan of the first spiral path, and
• means, including said central processing unit, for feeding signals to said beam producing means, which are synchronized with said scanning signals, for producing a beam at selected intervals along said first and second spiral paths and for thereby displaying a picture along said first spiral path and displaying a picture along said second spiral path,
• said second spiral path being scanned sufficiently soon after said first spiral path is scanned that the pictures displayed along the first and second spiral paths appear simultaneously to a human eye looking at said screen,
• said game including said pictures.

The method of performing a game with a beam for producing a plurality of pictures on a screen comprising:

• producing a scanning field which would cause said beam, to trace in a first location on said screen, a first spiral path, if the beam was a continuous one,
• modulating the first-named beam, during the occurrence of said scanning field, for providing the first-named beam with sufficient amplitude at particular times, during the occurrence of said scanning field, for sufficiently illuminating the screen to display a visual picture in said first location,
• producing a scanning field which would cause said beam, to trace a second spiral path, in a second location on said screen, if the beam was a continuous one,
• modulating the first-named beam, during the occurrence of said second scanning field, for providing the first-named beam with sufficient amplitude at particular times, during the occurrence of the last-named scanning field, for sufficiently illuminating the screen to display a visual picture in said second location,
• said second scanning field occurring so soon after the first one that the two pictures appear, to the human eye, simultaneously, and
• controlling said scanning field and said beam to play the game.