Patent ID: 8773748
Filing Date: 2014-07-08
Classification: G02B,Y10T

Abstract:
1. A light modulator pixel unit, comprising: a substrate; a bottom electrode, formed above the substrate and electrically coupled to a first control end of a control circuit; a top electrode, formed above the substrate and electrically coupled to a third control end of the control circuit, where the top electrode is a semi-transparent metal thin film; a movable electrode, formed between the bottom electrode and the top electrode, and electrically coupled to a second control end of the control circuit, where a surface of the movable electrode facing the top electrode is a light reflection surface, the movable electrode is able to move perpendicularly to the light reflection surface, and there formed insulation material between the movable electrode and the top electrode, and between the movable electrode and the bottom electrode; and an insulation layer formed on the movable electrode, wherein the insulation layer comprises a transparent insulation material having a predetermined rigidity; where the top electrode, the movable electrode and the bottom electrode have corresponding positions, the movable electrode has an area smaller than that of the top electrode, under the control of the control circuit, the movable electrode is able to shift to a first position, a second position and a third position respectively; when the movable electrode is at the first position, two parts of a first light incident to the light modulator pixel unit interfere destructively, where one part comprises lights reflected by the top electrode, and the other part comprises lights exiting from the top electrode, after transmitting through the to electrode and being reflected by the movable electrode; when the movable electrode is at the second position, two parts of a second light incident to the light modulator pixel unit interfere destructively, where one part comprises lights reflected by the top electrode, and the other part comprises lights exiting from the top electrode, after transmitting through the to electrode and being reflected by the movable electrode; and when the movable electrode is at the third position, two parts of a third light incident to the light modulator pixel unit interfere destructively, where one part comprises lights reflected by the top electrode, and the other part comprises lights exiting from the top electrode, after transmitting through the to electrode and being reflected by the movable electrode, where the first, second and third lights are three monochromatic lights.