Apparatus and method for controlling extinction ratio in a...

Details Apparatus and method for controlling extinction ratio in a... Apparatus and method for controlling extinction ratio in a...

2007-07-17

2007-07-17

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

C349S072000, C349S034000

Reexamination Certificate

active

10173290

ABSTRACT:
A polarization controller includes: a liquid crystal cell; a mechanism for determining a compensation voltage; and a voltage driving circuit for applying the compensation voltage to the liquid crystal cell, where the application of the compensation voltage optimizes an extinction ratio of the liquid crystal cell. The controller controls the extinction ratio using an applied voltage to compensate for temperature changes, liquid crystal cell gap variations, and other errors of the liquid crystal cell. This controller is aimed at liquid crystal devices used in a wide ambient temperature range and is also useful to compensate for the fabrication errors of the liquid crystal switches.

REFERENCES:
patent: 5040896 (1991-08-01), Moslehi
patent: 5946116 (1999-08-01), Wu et al.
patent: 6519012 (2003-02-01), Helbing et al.
patent: 6567202 (2003-05-01), Harris et al.

Affiliated with

Also associated with

Rating

Apparatus and method for controlling extinction ratio in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for controlling extinction ratio in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling extinction ratio in a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3761476