Patent · US Active

Liquid crystal display having improved wavelength dispersion characteristics

US8821994B2 · kind B2 · utility

3Cited by

14References

26Claims

0Family size

Assignee

Akron Polymer Systems, Inc. · US

Inventors

Frank W. Harris · Akron, US
Jiaokai Jing · Uniontown, US
Ted Calvin Germroth · Kingsport, US
Xiaoliang Zheng · Hudson, US
Brian Michael King · Jonesborough, US
Dong Zhang · Uniontown, US
Thauming Kuo · Kingsport, US
Qifeng Zhou · Beijing, CN

Key dates

Filing date	Mar 29, 2007
Grant date	Sep 2, 2014
Priority date	—
Expiry date	Jan 26, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133637
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A multilayer optical retardation compensation film having at least one positive C-plate and at least one negative C-plate is used in an LCD device. The multilayer film may have a substantially flat wavelength dispersion curve, or the multilayer film combined with other layers in the LCD device may have a substantially flat wavelength dispersion curve. Polymer films for the positive C-plate may be identified according to their absorbance maxima at certain wavelength ranges.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.