Intel Corporation

Fujitsu Corporation

Kent State University

David B Chung

Daniel J Lenehan

Michael Kozhukh

Sergei Rutman

Hidefumi Yoshida

Kazutaka Hanaoka

Hideaki Tsuda

Hideo Chida

Kimiaki Nakamura

Philip J Bos

Bin Wang

A cholesteric display may be formed, in some embodiments, using a single display element to produce multi-colors for display. A cholesteric material may be sandwiched between a pair of substrates, each associated with pairs of opposed electrodes that are arranged in general transversely to the optical axis of incident light. The first pair of electrodes produce one of two liquid crystal states and result in the reflection of light of a particular wavelength. Light of other wavelengths may be reflected when a second pair (or set) of opposed electrodes, arranged in general transversely, also to the optical axis of incident light, are biased appropriately. So does a third pair (or set) of electrodes. A black and white color display may be generated from a single display element by modulating the pitch length of the cholesteric material within each pairs (or sets).

Black and white color cholesteric liquid crystal display

A cholesteric display may be formed, in some embodiments, using a single display element to produce multi-colors for display. A cholesteric material may be sandwiched between a pair of substrates, each associated with a first pair of opposed electrodes that are arranged generally transversely to the optical axis of incident light. The first pair of electrodes produce one of two liquid crystal states and result in the reflection of light of a particular wavelength. Light of other wavelengths may be reflected when a second pair (or set) of opposed electrodes, arranged generally transversely to the first pair of electrodes, are biased appropriately. A color display may be generated from a single display element by modulating the pitch length of the cholesteric material.

Full color cholesteric liquid crystal display

A liquid crystal display system and cell configuration is disclosed. The element has a first substrate, having a first substrate electrode and a second substrate having a second substrate electrode approximately parallel to the first substrate. In between the two substrates is sandwiched a cholesteric liquid crystalline material. The pitch of the cholesteric material can be controlled by at least two interdigitized electrodes, electrically separated from each other, arranged on the second substrate.

Single panel, active matrix, full color, cholesteric LCD cell configuration

A liquid crystal diffractive light valve includes: a pair of opposed substrates wherein one of the substrates is a silicon wafer with associated electronics. The other substrate has an electrode layer facing the silicon substrate. And a ultraviolet curable composite material is disposed between the substrates which is then phase separated to form polymer walls having liquid crystal directors fixed therein regardless of application of an electric field across the electrode layers, and wherein pixel regions are formed between the polymer walls. The pixel regions have liquid crystal directors which are movable when an electric field is applied across the electrode layers. Application of an electric field allows for generation of phase differences between the wall and pixel regions to allow for Liquid Crystal on Silicon devices to be used as diffractive light valves.

Liquid crystal on silicon diffractive light valve

Liquid crystal on silicon (LCOS) cells include a plurality of pixel elements formed between substrates. Spacers are formed on a portion of some of the pixel elements and positioned in the cell gap. The spacers on each of these LCOS cells reflecting different colors are formed in different locations in each cell. The result is that substantially none of the spacers create overlapping dead spots in a composite image. The spacers are further distributed among these pixel elements such that spacers are absent from some pixel elements and such that there is a substantially uniform thickness in the cell gaps. The reduced severity of the dead spots in the composite image as a result of the spacers in different locations, the reduced size and number of the spacers, and the uniformity in the cell gaps provide higher optical image quality.

Built-in spacers for liquid crystal on silicon (LCOS) devices

A micromechanical reflection phase grating may be formed of spring-like ribbon reflectors that are secured to a transparent cover positioned over a substrate such as a silicon substrate. The ribbon reflectors are formed independently of the silicon substrate. If a defect occurs in the phase grating and particularly the ribbon reflectors, the top plate assembly can be reworked or discarded without sacrificing the relatively expensive silicon substrate.

Micromechanical diffraction phase grating

A polymer dispersed liquid crystal material comprising a polymer matrix, a liquid crystal and a diffusing agent.

Growing community of inventors

Cupertino, CA, United States of America

David B Chung