DIGITAL CONTROL OF COLOR IN CRT DISPLAY

The color of a pixel produced on the face of a CRT is determined by the n bits of a hue/saturation digital input signal which is applied to a decoder to select one of 2.sup.n output lines of the decoder. Each output line is connected through a red, green and blue resistor triplet and through red, green and blue amplifier channels to respective red, green and blue signal inputs of the CRT. The values of the red, green and blue resistors in a selected resistor triplet determine the color of the pixel. The bits of a brightness signal are used to equally control the gain in the red, green and blue channels.