US4521078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical display without reflection
Assignee: Mannesmann VDO AG
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Filing: 1981-05-14
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Granted: 1985-06-04
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Expires: 2001-05-14
Abstract
Abstract An electro-optical display for displaying characters and symbols on a display surface facing the viewer on the instrument panel of an automotive vehicle without specular reflection, particularly a liquid-crystal display therefor. The display surface is swingably arranged in a position other than 90 degrees relative to the direction in which the observer views the display surface and the characters and symbols are represented in such distorted manner on the display surface that they can be perceived without distortion from the direction of view of the observer.
Inventors
- 👤 Holm Baeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
G; G12; G12B; G12B11/00; G01; G01D; G01D13/00; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G09; G09F; G09F9/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
In an electro-optical display on an instrument panel of an automotive vehicle, said display including a liquid crystal layer and a polarization filter, said display for displaying characters and symbols in said liquid crystal layer the improvement wherein a depth of installation of said device on said instrument panel is commensurate with the distance between said filter and said layer; and means for swingably mounting said display on said instrument panel are provided so that a central plane through the characters and symbols of the liquid crystal layer is selectively arrangeable in positions other than 90 degrees relative to a direction in which the observer sitting normally in the vehicle views the liquid crystal display and the configuration of the characters and symbols appearing in the liquid crystal layer is a projection of characters and symbols which is perceivable by the observer from a plane vertical to said direction of view of the observer to said plane of the liquid crystal layer.
Claim 2
Dependent Claim
162 words
In an electro-optical display on an instrument panel of an automotive vehicle, said display including a liquid crystal layer and a polarization filter, said display for displaying characters and symbols in said liquid crystal layer the improvement wherein a depth of installation of said device on said instrument panel is commensurate with the distance between said filter and said layer; and means for swingably mounting said display on said instrument panel are provided so that a central plane through the characters and symbols of the liquid crystal layer is selectively arrangeable in positions other than 90 degrees relative to a direction in which the observer sitting normally in the vehicle views the liquid crystal display and the configuration of the characters and symbols appearing in the liquid crystal layer is a projection of characters and symbols which is perceivable by the observer from a plane vertical to said direction of view of the observer to said plane of the liquid crystal layer.
Claim 3
Dependent Claim
15 words
The electro-optical display as set forth in claim 1, wherein said display layer is flat.
Claim 4
Dependent Claim
14 words
The display according to claim 2, wherein said entire liquid crystal display is inclined.
Claim 5
Dependent Claim
29 words
The electro-optical display as set forth in claim 1, wherein said display layer is curved and has a focal point out of the direction of view of the observer.
Claim 6
Dependent Claim
16 words
The electro-optical display as set forth in claim 4, wherein said display layer is curved convexly.
Claim 7
Dependent Claim
16 words
The electro-optical display as set forth in claim 4, wherein said display layer is curved concavely.
Claim 8
Dependent Claim
14 words
The display according to claim 3, wherein said entire liquid crystal display is curved.
Claim 9
Dependent Claim
30 words
The display according to claim 1, wherein said means for mounting comprises a shaft at a lower end of the display and fixed bearing means for pivotably mounting said shaft.
Claim 10
Dependent Claim
29 words
The display according to claim 8, wherein said shaft has opposite ends which extend beyond said display, and said bearing means comprises bearings in which said ends are disposed.
Claim 11
Dependent Claim
159 words
In an electro-optical display for displaying characters and symbols in a liquid crystal layer of the display on an instrument panel of an automotive vehicle, the improvement wherein the layer of said display is curved and is variably arrangeable in a position other than 90 degrees relative to a direction in which an observer sitting normally in the vehicle views the liquid crystal display; said display comprising said liquid crystal layer and a polarization filter curved as said to maintain a spacing between said layer and said filter; and wherein the characters and symbols appearing in the liquid crystal layer are a projection of characters and symbols which are perceivable by the observer from a plane vertical to said direction of view of the observer to said plane of the liquid crystal layer; and wherein a depth of installation of said device on said instrument panel is commensurate with the distance between said filter and said liquid crystal layer.
Claim 12
Dependent Claim
159 words
In an electro-optical display for displaying characters and symbols in a liquid crystal layer of the display on an instrument panel of an automotive vehicle, the improvement wherein the layer of said display is curved and is variably arrangeable in a position other than 90 degrees relative to a direction in which an observer sitting normally in the vehicle views the liquid crystal display; said display comprising said liquid crystal layer and a polarization filter curved as said to maintain a spacing between said layer and said filter; and wherein the characters and symbols appearing in the liquid crystal layer are a projection of characters and symbols which are perceivable by the observer from a plane vertical to said direction of view of the observer to said plane of the liquid crystal layer; and wherein a depth of installation of said device on said instrument panel is commensurate with the distance between said filter and said liquid crystal layer.
Claim 13
Dependent Claim
112 words
A dereflected electro-optical display for representing characters and symbols on a display surface thereof facing a viewer on an instrument panel of a motor vehicle having windows and defining a longitudinal axis, wherein said display surface is arranged in a position wherein a central perpendicular to the display surface is downwardly inclined at an angle relatively to the longitudinal axis of the vehicle, and light arriving from the windows and reflected at the display surface is reflected into a region which is situated below viewing direction of the viewer viewing the display, and means for pivotally coupling said display to said instrument panel are provided so that said angle is selectively variable.
Claim 14
Dependent Claim
112 words
A dereflected electro-optical display for representing characters and symbols on a display surface thereof facing a viewer on an instrument panel of a motor vehicle having windows and defining a longitudinal axis, wherein said display surface is arranged in a position wherein a central perpendicular to the display surface is downwardly inclined at an angle relatively to the longitudinal axis of the vehicle, and light arriving from the windows and reflected at the display surface is reflected into a region which is situated below viewing direction of the viewer viewing the display, and means for pivotally coupling said display to said instrument panel are provided so that said angle is selectively variable.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |