US 6,501,590 B2 · Display medium using emitting particles dispersed in a transparent host

Abstract

Two and three dimensional color image displays. The displays include a display medium having a substantially uniform dispersion of red, green and blue visible light emitting particles sized between approximately 0.5 to approximately 50 microns therethrough. The particles can be dye doped polymethylmethacrylate(pmma) plastic, and the display medium can be pmma, acrylic plastic or glass. Other particles can be used such as rare earth doped crystals. The two dimensional display uses three laser sources each having different wavelengths that direct light beams to each of three different types of particle in the display medium. Light is absorbed by the particles which then become excited and emit visible fluorescence. Modulators, scanners and lens can be used to move and focus the laser beams to different pixels in order to form the two dimensional images having different visible colors.

Claims18

Dependent claims

A two dimensional color image display system, comprising in combination:

first particles containing dye doped plastics dispersed within a transparent display medium;
means for generating a first light beam having a first wavelength;
and
means for exciting the first particles within the transparent display medium, wherein the first particles absorb the first light beam and form a first visible light color from the first particles being excited by the first light beam.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

09/976,921Filed 12 Oct 2001 · division

Priority

25 Nov 1998

Published

US 2002/0063946 A130 May 2002

Granted

31 Dec 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

C09K 11/02
Luminescent materials, e.g. electroluminescent or chemiluminescent: use of particular materials as binders, particle coatings or suspension media…
C09K 11/7773
Halogenides: with alkali or alkaline earth metal
G02F 2/02
Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light: frequency-changing of light, e.g. by quantum counters
G09F 13/20
Illuminated signs; Luminous advertising: with luminescent surfaces or parts

Family

Application60/109,837Us provisional application · filed 25 Nov 1998

Application09/448,657Parent of this division · filed 24 Nov 1999

US 2002/0063946 A1Pre-grant publication · published 30 May 2002

US 6,327,074 B1Parent of this division

US 6,501,590 B2This patent

From the US filing history. Foreign family members aren’t listed.

Display medium using emitting particles dispersed in a transparent host

Life of this patent

Display medium using emitting particles dispersed in a transparent host

Life of this patent

Abstract

Claims18