Patent US5151802A successfully refreshed from Google Patents.
US5151802A
Expired / Lapsed
US
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Device for forming images on a large surface and simulator equipped with such a device
Assignee: Thales SA
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Filing: 1991-05-30
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Granted: 1992-09-29
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Expires: 2011-05-30
Abstract
Abstract A simulator comprises a dome on which are formed synthesized large-field images, the image-forming surface of the dome being "active", i.e., it is not used as a projection screen, but the images are formed directly by "cells". As a result of this arrangement, successive portions of the spherical surface, which are dark in the absence of excitation, make it possible to increase the contrast of the images obtained. According to one embodiment, these cells comprise encapsulated liquid crystals.
Inventors
- 👤 Alain Couturier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:44
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/32; G09B9/308; G09F; G09F9/00; G09F9/30; G09F9/305; G09F9/35
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A simulator for simulating operation of a vehicle for an operator, comprising: a control booth for duplicating controls of the vehicle; and a display screen viewable from inside said booth for simulating a view from the vehicle, the display screen including an active screen at least a portion of which is spherical and having a display device which is formed at least partly by juxtaposed cells each constituting an image-forming surface of a device for producing images, the cells being excited individually, cells not excited being dark, wherein the cells comprise sheets of encapsulated liquid crystals.
Claim 2
Dependent Claim
96 words
A simulator for simulating operation of a vehicle for an operator, comprising: a control booth for duplicating controls of the vehicle; and a display screen viewable from inside said booth for simulating a view from the vehicle, the display screen including an active screen at least a portion of which is spherical and having a display device which is formed at least partly by juxtaposed cells each constituting an image-forming surface of a device for producing images, the cells being excited individually, cells not excited being dark, wherein the cells comprise sheets of encapsulated liquid crystals.
Claim 3
Dependent Claim
27 words
A simulator according to claim 1, wherein each cell comprises a plurality of image elements, means being provided for electronically addressing each image element of each cell.
Claim 4
Dependent Claim
12 words
A simulator according to claim 1, wherein the cells function by transmission.
Claim 5
Dependent Claim
20 words
A simulator according to claim 1, further including a reflector and wherein the cells function by reflection from said reflector.
Claim 6
Dependent Claim
17 words
A simulator according to any one of claims 1-4, wherein colored dots are painted on the cells.
Claim 7
Dependent Claim
22 words
A simulator according to claim 1, wherein at least one of said cells has a different size than others of said cells.
Claim 8
Dependent Claim
49 words
A simulator according to claim 1, further including a light source common to a first plurality of said cells wherein said cells are reflective and are located inside said spherical part of said simulator and said one light source is slaved to an axis of observation of said operator.
Claim 9
Dependent Claim
25 words
A simulator according to claim 1, wherein each of said cells is associated with a projection means with each projection means including a light source.
Claim 10
Dependent Claim
51 words
A simulator according to claim 1, further including a projection means and a plurality of optical fibers fed from said projector and being closely packed at said projector to a respective one of said cells wherein ends of said optical fibers at said cell are spread apart and shaped as microlenses.
Claim 11
Dependent Claim
20 words
The simulator according to claim 7, wherein said at least one light source is slaved to the operator's head movements.
References Cited (Backward Citations)
US4732456A
Cited
WO1988000715A1
Cited
US4693560A
Cited
EP0275061A2
Cited
US4806922A
Cited
EP0324147A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |