Patent · US Expired

Liquid crystal color display screen comprising a phosphor layer

US6654079B2 · kind B2 · utility

8Cited by

7References

20Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Helmut Bechtel · Aachen, DE
Hans Nikol · Aachen, DE
Cornelis Reinder Ronda · Aachen, DE
Thomas Justel · Witten, DE

Key dates

Filing date	Jan 12, 2001
Grant date	Nov 25, 2003
Priority date	—
Expiry date	Oct 23, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/133617
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A liquid crystal color display screen is provided with an electro-optical medium, two parallel transparent substrates by which the electro-optical medium is flanked, a device that influences the transmission state of the electro-optical medium, and a phosphor layer having at least two phosphors on the first substrate. A radiation source emits radiation having a maximum emission at a wavelength &lgr;1 <360 nm. The radiation source is situated at the side of the second substrate. The screen also includes a UV phosphor that transforms the radiation having a maximum emission at a wavelength &lgr;1<360 nm to radiation having a maximum emission at a wavelength &lgr;2>360 nm.

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