Gamma correction method for use in television and apparatus for carrying out these methods

Claim 1

A SYSTEM FOR PROVIDING A NON-LINEAR CORRECTION FOR COLOR TELEVISION SIGNALS, SAID SYSTEM COMPRISING IMAGE PLATE MEANS HAVING AN IMAGE TO BE TELEVISED, FLYING SPOT SCANNER MEANS FOR PROVIDING A LINE BY LINE SCANNING SPOT OF LUMINOUS FLUX ON SAID PLATE MEANS, A PLURALITY OF MEANS FOR CONVERTING THE LUMINOUS FLUX OF THE ILLUMINATED POINTS OF SAID PLATE MEANS INTO A PLURALITY OF ELECTRIC SIGNALS CORRESPONDING TO DIFFERENT COLORS OF SAID IMAGE, MEANS FOR COMBINING SAID SIGNALS IN PREDETERMINED PROPORTIONS, NON-LINEAR CIRCUIT MEANS HAVING A POWER INDEX OF THE FORM 1 -1 $ WHEREIN $ IS A CONSTANT, MEANS APPLYING SAID COMBINED SIGNALS TO SAID NON-LINEAR CIRCUIT MEANS, MEANS APPLYING THE OUTPUT OF SAID NON-LINEAR CIRCUIT MEANS TO SAID SCANNER MEANS TO CONTROL THE INTENSITY OF SAID LUMINOUS FLUX, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUTS OF SAID CONVERTING MEANS.