Patent ID: 7006272

Claim:
An optical interference color planar display, comprising: a control circuit; a driver circuit; and a modulator array comprising: a first plate; a second plate; an operating plate; at least one first post located between the operating plate and the second plate, wherein the second plate is directly connected to the first post; and at least one second post located between the first plate and the second plate, wherein a cavity is formed between the first plate and the second plate, and an incident light from one side of the first plate is modulated and a reflected light of only specific frequency is reflected by the second plate, and the second plate directly contacts and shifts along the first post towards the operating plate and directly contacts and shifts along the second post towards the first plate by a voltage added on the operating plate so as to change the distance of the cavity, thereby changing the frequency of the reflected light; wherein the control circuit connects to the operating plate to control the length of the cavity of a modulator of the modulator array for reflecting the reflected light with a special wave length, and the driver circuit connects to the first plate and the second plate to control the on or off of the modulator.