In this paper we present a new color measurement technique in which an innovation of a seven
color ball sensor to detect the chromaticity of the tested sample was introduced. Developed with the
advanced micro-processor, color ratio comparison technique, technique of the optoelectronic detection
and multiplexer circuit and software design, this measurement device is capable to perform an
accurately stable, high speed and multi color detection by real time measurement. By this arrangement,
the seven color balls produce 5040 combinations of color. Compared with traditional
spectro-photometer, the color detection error of the system is less than 0.1%. And it can be applied to
classify the LED’s color luminance and chromaticity.
