GB1524334A - Television receiver with an added facility for displaying play symbols an the screen - Google Patents

Abstract

1524334 Ultrasonic remote control ITT INDUSTRIES INC 24 March 1977 [30 March 1976] 12429/77 Heading G4F [Also in Division H4] To control remotely a game displayed on a T.V. screen 12, the T.V. receiver 11 contains a master control unit 131 controlling play or player symbols on the screen and responding to one or more player control units transmitting wirelessly, e.g. by ultrasonic or IR means. Using commercial IC's in ultrasonic coupling 62-133, 30 frequencies are available: each player control 31, 32 has coupled to remote control 6 seven switches 311, 321, preferably touch contact, a-g, a<SP>1</SP>-g<SP>1</SP> of which a-d, a<SP>1</SP>-d<SP>1</SP> control the movement of the respective player's symbol in a selected one of three games 24 channels are allotted to the possible combinations of one or none of four switches from each player. Alternatively a matrix of switches for each player can define the zone of the screen on which the respective player's symbol is to appear. With either system frequencies may be shared between the players by time division multiplex synchronized by additional frequencies. The other three switches provide sequential game selection, score zeroing and re-start procedures such as throw-in, using 5 channels, and channel 30 may be used to control remotely the normally manually controlled switch 14 changing the receiver from game to T.V. reception and vice-versa. When receiving T.V. the same remote controller 6 can be used in known manner for channel selection and brightness, &c. control via unit 15. In an alternative embodiment continuously variable pulse width modulation of IR emission controlled by potentiometers determines the position of the play symbols.