Patent Number: 6,295,039

Title: Thin illuminator for reflective displays

Abstract: A display that includes an array of reflective pixels, a linear light source; and a reflector. The reflector includes a cylindrical surface, the axis of the cylindrical surface being parallel to the linear light source. The linear light source is positioned relative to the reflector such that light from the linear light source is reflected by the reflector onto the array of reflective pixels. The reflector is constructed from a material that is partially reflecting. The linear light source preferably includes a plurality of light emitting diodes and an optical diffuser. In a color display, the light emitting diodes include diodes having different emission spectra. In one embodiment of the invention, the reflector is constructed from a material that reflects light of a first linear polarization while transmitting light having a linear polarization orthogonal to the first linear polarization. In this embodiment, each pixel in the array of reflective pixels preferably includes a polarization rotating cell that rotates the linear polarization vector of light reflected by the pixel in response to the receipt of an electrical signal by the pixel.

Inventors: Mertz; Pierre H. (Mountain View, CA), Heffner; Brian L. (Los Altos, CA)

Assignee: Agilent Technologies, Inc.

International Classification: G09F 13/16 (20060101); G02B 005/10 (); G03B 021/14 (); G09G 005/00 (); G09G 003/00 ()

Expiration Date: 09/25/2018