Patent Number: 6,445,433

Title: Pixel structure having deformable material and method for forming a light valve

Abstract: A light valve capable of operating in an "off" state for reflecting light and in an "on" state for diffracting and reflecting light. The valve includes a semiconductor substrate having a plurality of electrodes formed therein for receiving voltages and for generating an electric field in response to the received voltages. A layer of transparent deformable dielectric material is disposed on the reflective electrodes which deforms in response to the generated electric field. When the valve is in its "on" state, the electric field causes deformities in the dielectric material which diffract incident light reflected off of the valve. In another embodiment, the dielectric material is placed on the reflective electrodes or on a transparent substrate having a transparent electrode formed thereon. The transparent substrate is then disposed in spaced relation from the semiconductor substrate containing the reflective electrodes.

Inventors: Levola; Tapani (Tampere, FI)

Assignee: Nokia Corporation

International Classification: G02B 26/08 (20060101); G02B 5/18 (20060101); G02F 001/133 ()

Expiration Date: 09/03/2019