초록 ▼

A method for continuously controlling color of a display device comprises the steps of receiving three sets of data respectively representing the portions of three primary colors, accumulating three counts in accordance with the data, respectively, and setting three bistable devices for the respecti

A method for continuously controlling color of a display device comprises the steps of receiving three sets of data respectively representing the portions of three primary colors, accumulating three counts in accordance with the data, respectively, and setting three bistable devices for the respective durations of the accumulating. The outputs of the three bistable devices are coupled for respectively energizing three buses, to which the light emitting diodes of three primary colors are connected in accordance with their colors, for controlling the portions of the light signals of the primary colors emitted therefrom.

대표청구항 ▼

[ What I claim is:] [1.]1. A method for continuously controlling color of a variable color display device, which includes a plurality of display areas arranged in a pattern for exhibiting, upon selective activation, a plurality of display units, each said display area including a first light emittin

[ What I claim is:] [1.]1. A method for continuously controlling color of a variable color display device, which includes a plurality of display areas arranged in a pattern for exhibiting, upon selective activation, a plurality of display units, each said display area including a first light emitting diode for emitting, when forwardly biased, light signals of a first primary color, a second light emitting diode for emitting, when forwardly biased, light signals of a second primary color, and means for combining said light signals in said display area to obtain a light signal of a composite color, the method comprising:repeatedly defining a cycle by developing a start signal at the beginning of each said cycle;receiving n-bit data representing in value the portions of a first primary color, where n is an integer having value at least 2;developing an end signal timed, in relation to said start signal, in accordance with the value of said data;activating a selective plurality of said display areas for exhibiting a selected display unit;developing a stable signal of a first logic level in response to said start signal and a stable signal of an opposite logic level in response to said end signal;applying a first control signal, in accordance with said stable signal of said first logic level, for forwardly biasing said first light emitting diodes in the activated display areas, andapplying a second control signal, in accordance with said stable signal of said opposite logic level, for forwardly biasing said second light emitting diodes in the activated display areas.