Menting T Tsai

US Patent:

20100271571, Oct 28, 2010

Filed:

Apr 27, 2009

Appl. No.:

12/430179

Inventors:

Guomin Zhang - Richardson TX, US
Menting Tim Tsai - Richardson TX, US

International Classification:

G02F 1/1334
C09K 19/12
C09K 19/30

US Classification:

349 86, 25229963, 25229966

Abstract:

A polymer dispersed liquid crystal light shutter device and method for use of the same are disclosed. First and second substrates are disposed substantially parallel. A polymer binder system is interposed between the first and second substrates and a plurality of liquid crystals are dispersed in the polymer binder system. The liquid crystal shutter device is able to switch between a high light absorbing dark state and a low light absorbing transparent state, and visa versa, with a low driving voltage. The liquid crystal shutter device includes formulations of liquid crystal mixtures having nematic liquid crystals and polymer systems to provide a wide viewing angle, low driving voltage, high contrast ratio, for example.

US Patent:

20170269396, Sep 21, 2017

Filed:

Mar 17, 2016

Appl. No.:

15/073256

Inventors:

- Richardson TX, US
Menting Tim Tsai - Plano TX, US

International Classification:

G02F 1/13
G02F 1/137
G02F 1/1334

Abstract:

A polymeric dispersed liquid crystal light shutter device and system and method for forming the same are disclosed. In one embodiment of the system, a catoptric form having a shape is subjacently positioned below a pre-cure or un-cured polymer dispersed liquid crystal (PDLC) light shutter device having liquid crystals dispersed in a polymer binder system between two substrates. Light is applied during curing. The liquid crystal microdroplet sizes vary according to the shape of the catoptric form such that domains of smaller liquid crystal microdroplet sizes correspond to the shape and domains of larger liquid crystal microdroplet sizes correspond to negative space relative to the shape. Upon tuning an electric field, the PDLC light shutter device changes states from presenting a surface having an image formed by non-scattering regions contrasted against opaque scattering regions, to a surface characterized by mostly or entirely clear, non-scattering light transmittance.

US Patent:

20170269400, Sep 21, 2017

Filed:

Mar 17, 2016

Appl. No.:

15/073153

Inventors:

- Richardson TX, US
Menting Tim Tsai - Plano TX, US

International Classification:

G02F 1/1334
G03F 1/50
G03F 7/20
G02F 1/137

Abstract:

A polymeric dispersed liquid crystal light shutter device employing an electronically tunable lens and system and method for forming the same are disclosed. In one embodiment of the system, a patterned UV-photomask with an image is superposed on a pre-cure or un-cured polymer dispersed liquid crystal (PDLC) light shutter device having liquid crystals dispersed in a polymer binder system between two substrates. UV-light is applied during curing. The liquid crystal microdroplet sizes vary according to the image on the patterned mask such that domains of larger liquid crystal microdroplet sizes correspond to the image and domains of smaller liquid crystal microdroplet sizes correspond to negative space relative to the image. Upon tuning an electric field, the PDLC light shutter device changes states from presenting a surface having an image formed by partially-scattering regions contrasted against clear non-scattering regions, to a surface characterized by mostly or entirely clear, non-scattering light transmittance.