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1. WO1996003676 - IMAGE PROJECTION SYSTEM AND METHOD OF USING SAME

Publication Number WO/1996/003676
Publication Date 08.02.1996
International Application No. PCT/US1995/009631
International Filing Date 25.07.1995
Chapter 2 Demand Filed 21.02.1996
IPC
H04N 9/31 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
9Details of colour television systems
12Picture reproducers
31Projection devices for colour picture display
CPC
G02B 19/0028
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
19Condensers, ; e.g. light collectors or similar non-imaging optics
0004characterised by the optical means employed
0028refractive and reflective surfaces, e.g. non-imaging catadioptric systems
G02B 19/0057
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
19Condensers, ; e.g. light collectors or similar non-imaging optics
0033characterised by the use
0047for use with a light source
0052the light source comprising a laser diode
0057in the form of a laser diode array, e.g. laser diode bar
G02B 19/009
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
19Condensers, ; e.g. light collectors or similar non-imaging optics
0033characterised by the use
009for use with infra-red radiation
G02B 23/06
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
23Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies
02involving prisms or mirrors
06having a focussing action, e.g. parabolic mirror
G02B 27/0927
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
09Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
0927Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
G02B 27/0944
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
09Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
0938Using specific optical elements
0944Diffractive optical elements, e.g. gratings, holograms
Applicants
  • PROXIMA CORPORATION [US/US]; 9440 Carroll Park Drive San Diego, CA 92121-2256, US
Inventors
  • MINICH, Arthur, P.; US
  • KAPPEL, David, W.; US
  • HARGIS, David, E.; US
  • ASSA, Shlomo; US
  • SHAPIRO, Leonid; US
Agents
  • KLEINKE, Bernard, L.; Higgs, Fletcher & Mack LLP 401 West "A" Street, Suite 2000 San Diego, CA 92101-7913, US
Priority Data
08/279,94325.07.1994US
08/292,61918.08.1994US
08/506,09724.07.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMAGE PROJECTION SYSTEM AND METHOD OF USING SAME
(FR) SYSTEME DE PROJECTION D'IMAGES ET SON PROCEDE D'UTILISATION
Abstract
(EN)
An image projection system includes a source of polarized light and a spatial light modulator, having an alignment layer, wherein the polarized light is aligned with the alignment layer to allow the light to pass without the need for polarizers. Three different colored images may be produced by three separate polarized light sources (222A, 226A, 230A) with corresponding light valve super-imposed. Light sources may either be maintained activated or may be sequenced at high input energies for short intervals to reduce average energy costs. A microlaser array (922) may be coupled with a beam shaper (936) to further increase brightness of the image. The beam shaper may include a binary phase plate to modify the shape and intensity profile of the projection light beam.
(FR)
Un système de projection d'images comprend une source de lumière polarisée et un modulateur spatial de lumière, comportant une couche d'alignement, dans lequel la lumière polarisée est alignée sur la couche d'alignement pour laisser passer la lumière sans polariseurs. Trois images de couleurs différentes peuvent être produites par trois sources de lumière polarisée (222A, 226A, 230A) séparées avec un modulateur de lumière correspondant superposé. Les sources de lumière peuvent être maintenues dans un état activé ou peuvent être séquencées à des énergies d'entrée élevées pendant de courts intervalles pour réduire les coûts d'énergie moyens. Un ensemble de microlasers (922) peut être couplé à un dispositif de formage de faisceaux (936) pour augmenter davantage la brillance de l'image. Le dispositif de formage de faisceaux peut comprendre une plaque de phase binaire pour modifier la forme et le profil d'intensité du faisceau lumineux de projection.
Also published as
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