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1. (WO2005033774) METHOD FOR CORRECTING FOR THE DISTORTION OF A LIQUID CRYSTAL IMAGER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/033774 International Application No.: PCT/EP2004/052422
Publication Date: 14.04.2005 International Filing Date: 04.10.2004
IPC:
G02B 27/00 (2006.01) ,G02B 27/01 (2006.01) ,H04N 3/233 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27
Other optical systems; Other optical apparatus
01
Head-up displays
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
3
Scanning details of television systems; Combination thereof with generation of supply voltages
10
by means not exclusively optical-mechanical
16
by deflecting electron beam in cathode-ray tube
22
Circuits for controlling dimensions, shape or centering of picture on screen
23
Distortion correction, e.g. for pincushion distortion correction, S-correction
233
using active elements
Applicants: ROLS, Olivier[FR/FR]; FR (UsOnly)
VERBEQUE, Jean-René[FR/FR]; FR (UsOnly)
THALES[FR/FR]; 45, rue de Villiers F-92200 NEUILLY-SUR-SEINE, FR (AllExceptUS)
Inventors: ROLS, Olivier; FR
VERBEQUE, Jean-René; FR
Agent: ESSELIN, Sophie ; MARKS & CLERK FRANCE 31-33, avenue Aristide Briand F-94117 ARCUEIL Cedex, FR
Priority Data:
03 1172707.10.2003FR
Title (EN) METHOD FOR CORRECTING FOR THE DISTORTION OF A LIQUID CRYSTAL IMAGER
(FR) PROCEDE DE CORRECTION DE DISTORSION D'UN IMAGEUR A CRISTAUX LIQUIDES
Abstract:
(EN) The invention concerns the field of collimated image presentation systems and, in particular, that of head-up displays used in aircraft. One of the principle technical difficulties for obtaining a good-quality image (51) consists of correcting for the geometric distortion essentially introduced by the collimating and superposition optics (2, 3) of the display. This difficulty is further increased with matrix-type displays (1) in which analogous corrections are excluded. To this end, the invention provides a simple method that enables distortion to be determined and then corrected for.
(FR) Le domaine de l'invention est celui des systèmes de présentation d'images collimatées, et plus précisément celui des viseurs dits Tête Haute utilisés sur aéronefs. Une des principales difficultés techniques pour obtenir une image (51) de bonne qualité est la correction de la distorsion géométrique introduite essentiellement par l'optique (2, 3) de collimation et de superposition du viseur. Cette difficulté est encore accrue avec des afficheurs (1) de type matriciel où les corrections de type analogiques sont exclues. L'invention propose un procédé simple permettant de déterminer la distorsion puis de la corriger.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)