Present methods generally rely on use of high quality, expensive, low drift analog designs and components. This accuracy must be maintained over production variation, environmental conditions, and over the life of the equipment. A HUD requires that certain CRT generated symbols be projected optically against the pilot's outside view of the real world, with accurate absolute registration. An example of this requirement exists for aircraft Head Up Displays (HUD).
G02B2027/0138- Head-up displays characterised by optical features comprising image capture systems, e.g.G02B27/0101- Head-up displays characterised by optical features.G02B27/00- Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00.G02B- OPTICAL ELEMENTS, SYSTEMS OR APPARATUS.H04N3/22- Circuits for controlling dimensions, shape or centering of picture on screen.H04N3/16- Scanning details of television systems Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g.H04N3/10- Scanning details of television systems Combination thereof with generation of supply voltages by means not exclusively optical-mechanical.H04N3/00- Scanning details of television systems Combination thereof with generation of supply voltages.Application granted granted Critical Publication of US4847603A publication Critical patent/US4847603A/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Blanchard Clark E filed Critical Blanchard Clark E Priority to US06/859,120 priority Critical patent/US4847603A/en Assigned to JET ELECTRONICS & TECHNOLOGY, 5353 52ND STREET, GRAND RAPIDS, MI 49508 A CORP OF MI reassignment JET ELECTRONICS & TECHNOLOGY, 5353 52ND STREET, GRAND RAPIDS, MI 49508 A CORP OF MI ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee Blanchard Clark E Priority date (The priority date is an assumption and is not a legal conclusion. JET ELECTRONICS & TECHNOLOGY 5353 52ND STREET GRAND RAPIDS MI 49508 A CORP OF MI Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Blanchard Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US06/859,120 Inventor Clark E.
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Google Patents Automatic closed loop scaling and drift correcting system and method particularly for aircraft head up displaysĭownload PDF Info Publication number US4847603A US4847603A US06/859,120 US85912086A US4847603A US 4847603 A US4847603 A US 4847603A US 85912086 A US85912086 A US 85912086A US 4847603 A US4847603 A US 4847603A Authority US United States Prior art keywords deflection display real time display system position sensing Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4847603A - Automatic closed loop scaling and drift correcting system and method particularly for aircraft head up displays US4847603A - Automatic closed loop scaling and drift correcting system and method particularly for aircraft head up displays
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