Patent ID: 7491927

Claim:
A color sensing circuit for one of identifying a color, measuring a color, and color control comprising: a) a light detector to receive light and to generate a signal that is dependent on received light; wherein the light detector includes a first electrode coupled to a first node and a second electrode coupled to a second predetermined signal; b) a storage device that includes a first electrode and a second electrode; wherein the second electrode is coupled to the second predetermined signal; c) a first switch to selectively couple the first node with the first electrode of the storage device based on a charge control signal; d) a signal processing circuit that includes a first electrode, a first output that generates a first color signal, and a second output that generates a second color signal; and e) a second switch to selectively couple the first electrode of the storage device with the first electrode of the signal processing circuit based on an evaluate control signal; wherein the signal processing circuit selectively asserts the charge control signal and evaluate control signal.