EP0384993A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Automatic reconfiguration of electronic landing display
Assignee: Boeing Co
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Filing: 1989-10-04
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Granted: —
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Expires: 2009-10-04
Abstract
Abstract Automatically reconfiguring an electronic landing display that includes a flight path vector (FPV) symbol and a rising runway symbol combined with a digital altitude value that merge at low aircraft altitudes is disclosed. During approach, when the aircraft descends below a predetermined minimum altitude, e.g., 200 feet, the FPV symbol is removed. When the aircraft is on the ground and during takeoff, the rising runway symbol is removed. Removing one or the other of the merging symbols prevents the symbols from overlapping. Thus, the potential for pilot error due to one of the merging symbols occluding the other is avoided.
Inventors
- 👤 James E. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:04
CPC Classifications
G; G01; G01C; G01C23/00; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
In an electronic flight instrument system including an electronic landing display that includes a flight path vector (FPV) symbol and a runway symbol that merge toward one another when an aircraft incorporating the electronic flight instrument system descends below a first predetermined altitude above a runway during a landing maneuver, the improvement comprising means for automatically reconfiguring the electronic landing display by removing one or the other of said FPV and runway symbols as said symbols merge in time to prevent said symbols from overlapping and occluding one another.
Claim 2
Dependent Claim
89 words
In an electronic flight instrument system including an electronic landing display that includes a flight path vector (FPV) symbol and a runway symbol that merge toward one another when an aircraft incorporating the electronic flight instrument system descends below a first predetermined altitude above a runway during a landing maneuver, the improvement comprising means for automatically reconfiguring the electronic landing display by removing one or the other of said FPV and runway symbols as said symbols merge in time to prevent said symbols from overlapping and occluding one another.
Claim 3
Dependent Claim
45 words
The improvement claimed in Claim 1 including a radar altitude value associated with said runway symbol such that said radar altitude value would be occluded by said FPV symbol if said FPV symbol were allowed to overlap said runway symbol and said radar altitude value.
Claim 4
Dependent Claim
87 words
The improvement claimed in Claim 1 wherein said electronic flight instrument includes a programmed software controller for controlling the position and orientation of said FPV and runway symbols and said radar altitude value of said electronic landing display and wherein said means for automatically reconfiguring said electronic landing display comprises programming said programmed software controller such that said FPV symbol is removed when the altitude of said aircraft above said runway drops below a second predetermined value, which may be the same as said first predetermined value.
Claim 5
Dependent Claim
35 words
The improvement claimed in Claim 3 wherein said runway symbol and said radar altitude value rise toward said FPV symbol when the altitude of said aircraft above said runway drops below said first predetermined value.
Claim 6
Dependent Claim
24 words
The improvement claimed in Claim 4, wherein said runway signal and said radar altitude value are removed when said aircraft is on the ground.
Claim 7
Dependent Claim
29 words
The improvement claimed in Claim 5, wherein said runway symbol and said radar altitude value are also removed when the speed of said aircraft is below a predetermined value.
Claim 8
Dependent Claim
29 words
The improvement claimed in Claim 2, wherein said runway symbol and said radar altitude value are turned off when said aircraft is on the ground and at takeoff thrust.
Claim 9
Dependent Claim
33 words
The improvement claimed in Claim 7, wherein said runway symbol and said radar altitude value are also turned off when said aircraft is on the ground and at a speed below 80 knots.
Claim 10
Dependent Claim
30 words
The improvement claimed in Claim 2, wherein said flight path vector symbol is turned off when said aircraft is airborne and said radar altitude value is less than 200 feet.
Claim 11
Dependent Claim
37 words
The improvement claimed in Claim 9, wherein said flight path vector symbol is turned off when said rising runway symbol is turned on, said aircraft is airborne and said radar altitude value is less than 200 feet.
References Cited (Backward Citations)
No citation records indexed.
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