US5305012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intelligent electro-optical system and method for automatic glare reduction
Assignee: Reveo Inc
•
Filing: 1992-04-15
•
Granted: 1994-04-19
•
Expires: 2012-04-15
Abstract
Abstract An electro-optical system and method are disclosed for modulating the intensity of light rays propagating towards an optical element, such as an eye, a lens or aperture stop in a camera station, a camera station in a machine vision system, or other image detection device. The electro-optical system comprises an electro-optical element having a optically transparent surface having electrically addressable pixels. Each pixel has a light transmittance which is controllable by a controller that is operably associated with a computer system. An image acquisition device, such as a camera station, acquires an image of a spatial scene within the field of view of the optical element. The computer system processes the image to determine which pixels are to be addressed and actively driven in order to modulate (i.e. decrease) the intensity of incident light rays propagating through the determined pixels, towards the optical element. Illustrated uses for the present invention include glare and spatial noise reduction in the automotive, navigational, robotic and recreational arts.
Inventors
- 👤 Sadeg M. Faris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/10; G02C7/101; A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; A61F9/023; B; B60; B60J; B60J3/00; B60J3/02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/13306; G02F1/13318
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
217 words
Apparatus for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards an optical element having a field of view, said apparatus comprising: an electro-optical element having an optically transparent surface including a plurality of pixels through which the field of view of said optical element passes, each said pixel having a controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards said optical element; image acquisition means for acquiring one or more images of said three-dimensional spatial scene within the field of view of said optical element; image processing means for processing said one or more acquired images and determining at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before reaching said optical element; and control means for actively controlling the light transmittance of the determined pixels so that after incident light rays propagate through said determined pixels, said incident light rays propagate towards said optical element with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 2
Dependent Claim
217 words
Apparatus for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards an optical element having a field of view, said apparatus comprising: an electro-optical element having an optically transparent surface including a plurality of pixels through which the field of view of said optical element passes, each said pixel having a controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards said optical element; image acquisition means for acquiring one or more images of said three-dimensional spatial scene within the field of view of said optical element; image processing means for processing said one or more acquired images and determining at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before reaching said optical element; and control means for actively controlling the light transmittance of the determined pixels so that after incident light rays propagate through said determined pixels, said incident light rays propagate towards said optical element with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1, wherein said control means comprises means for electrically addressing and driving said determined pixels, and wherein the light transmittance of each said pixel is independently controllable.
Claim 4
Dependent Claim
42 words
The apparatus of claim 2, which further comprises an optical element tracking means for determining the position of said optical element with respect to said electro-optical element, and wherein said image acquisition means is stationarily positioned with respect to said electro-optical element.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve, and wherein the light transmittance of each said pixel is independently controllable.
Claim 6
Dependent Claim
25 words
The apparatus of claim 4, wherein said optical element is the pupil of an eye which is free to move relative to said electro-optical element.
Claim 7
Dependent Claim
21 words
The apparatus of claim 5, which further comprises means for installing said electro-optical element above the dashboard of an automotive vehicle.
Claim 8
Dependent Claim
42 words
The apparatus of claim 2, which further comprises an optical element tracking means for determining the position of said optical element with respect to said electro-optical element, and wherein said image acquisition means is stationarily positionable with respect to said electro-optical element.
Claim 9
Dependent Claim
17 words
The apparatus of claim 7, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve.
Claim 10
Dependent Claim
25 words
The apparatus of claim 8, wherein said optical element is the pupil of an eye which is free to move relative to said optical element.
Claim 11
Dependent Claim
21 words
The apparatus of claim 9, which further comprises means for installing said electro-optical element above the dashboard of an automotive vehicle.
Claim 12
Dependent Claim
23 words
The apparatus of claim 2, wherein said electro-optical element and said image acquisition means are stationarily positioned with respect to said optical element.
Claim 13
Dependent Claim
44 words
The apparatus of claim 11, wherein said optical element is the left and right eyes of a person, and wherein said electro-optical element comprises first and second electrically addressable liquid crystal light valve panels stationarily positionable with respect to said left and right eyes.
Claim 14
Dependent Claim
32 words
The apparatus of claim 1, wherein said electro-optical element further comprises a reflective layer adjacent said optically transparent surface so as to reflect incident light rays from behind said optically transparent surface.
Claim 15
Dependent Claim
42 words
The apparatus of claim 13, which further comprises an optical element tracking means for determining the position of said optical element with respect to said electro-optical element, and wherein said image acquisition means is stationarily positioned with respect to said electro-optical element.
Claim 16
Dependent Claim
18 words
The apparatus of claim 14, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve surface.
Claim 17
Dependent Claim
25 words
The apparatus of claim 15, wherein said optical element is the pupil of an eye which is free to move relative to said electro-optical element.
Claim 18
Dependent Claim
21 words
The apparatus of claim 16, which further comprises means for installing said electro-optical element above the dashboard of an automotive vehicle.
Claim 19
Dependent Claim
42 words
The apparatus of claim 13, which further comprises an optical element tracking means for determining the position of said optical element with respect to said electro-optical element, and wherein said image acquisition means is stationarily positionable with respect to said electro-optical element.
Claim 20
Dependent Claim
18 words
The apparatus of claim 18, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve surface.
Claim 21
Dependent Claim
25 words
The apparatus of claim 19, wherein said optical element is the pupil of an eye which is free to move relative to said optical element.
Claim 22
Dependent Claim
21 words
The apparatus of claim 20, which further comprises means for installing said electro-optical element above the dashboard of an automotive vehicle.
Claim 23
Dependent Claim
23 words
The apparatus of claim 13, wherein said electro-optical element and said image acquisition means are stationarily positioned with respect to said optical element.
Claim 24
Independent Claim
246 words
A method for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards an optical element having a field of view, said method comprising the steps: a) providing an elector-optical element at a desired distance from said optical element so that the field of view of said optical element passes through said electro-optical element and in the direction of the three-dimensional spatial scene, said electro-optical element having an optically transparent surface including a plurality of pixels, each said pixel having an controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in said three-dimensional spatial scene, through said pixel, then towards said optical element; b) acquiring one or more images of said three-dimensional spatial scene within the field of view of said optical element; c) processing said one or more acquired images so as to determine at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before said incident light rays reach said optical element; and d) actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards said optical element with an intensity reduced by said selected amount, so that glare produced from points in the three-dimensional spatial scene is automatically reduced.
Claim 25
Independent Claim
246 words
A method for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards an optical element having a field of view, said method comprising the steps: a) providing an elector-optical element at a desired distance from said optical element so that the field of view of said optical element passes through said electro-optical element and in the direction of the three-dimensional spatial scene, said electro-optical element having an optically transparent surface including a plurality of pixels, each said pixel having an controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in said three-dimensional spatial scene, through said pixel, then towards said optical element; b) acquiring one or more images of said three-dimensional spatial scene within the field of view of said optical element; c) processing said one or more acquired images so as to determine at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before said incident light rays reach said optical element; and d) actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards said optical element with an intensity reduced by said selected amount, so that glare produced from points in the three-dimensional spatial scene is automatically reduced.
Claim 26
Dependent Claim
32 words
The electro-optical system of claim 23, wherein said control means comprises means for electrically addressing and driving said determined pixels, and wherein the light transmittance of each said pixel is independently controllable.
Claim 27
Dependent Claim
30 words
The electro-optical system of claim 23, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve, and wherein the light transmittance of each said pixel is independently controllable.
Claim 28
Dependent Claim
42 words
The electro-optical system of claim 23, which further comprises eye-tracking means for determining the position of the eyes of the driver with respect to said electro-optical element, and wherein said image acquisition means is stationarily positionable with respect to said electro-optical element.
Claim 29
Dependent Claim
18 words
The electro-optical system of claim 26, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve.
Claim 30
Dependent Claim
26 words
The electro-optical system of claim 23, wherein said electro-optical element and said image acquisition means are stationarily positionable with resect to the eyes of the driver.
Claim 31
Dependent Claim
30 words
The electro-optical system of claim 28, wherein said electro-optical element comprises an electrically addressable liquid crystal light valve, and wherein the light transmittance of each said pixel is independently controllable.
Claim 32
Dependent Claim
34 words
The electro-optical system of claim 23, wherein said electro-optical element comprises first and second electrically addressable liquid crystal light valve panels stationarily positionable with respect to the left and right eyes of the driver.
Claim 33
Dependent Claim
17 words
The electro-optical system of claim 30, wherein the light transmittance of each said pixel is independently controllable.
Claim 34
Dependent Claim
33 words
The electro-optical system of claim 23, wherein said electro-optical element further comprises a reflective layer adjacent said optically transparent surface so as to reflect incident light rays from behind said optically transparent surface.
Claim 35
Dependent Claim
54 words
The electro-optical system of claim 23, which further comprises eye-tracking means for determining the position of the eyes of the driver with respect to said electro-optical element, and wherein said image acquisition means is stationarily positionable with respect to said electro-optical element, and wherein the light transmittance of each said pixel is independently controllable.
Claim 36
Dependent Claim
18 words
The electro-optical system of claim 31, wherein said electro-optical elements comprises an electrically addressable liquid crystal light valve.
Claim 37
Dependent Claim
17 words
The electro-optical system of claim 23, wherein said image acquisition means comprises a CCD image detecting array.
Claim 38
Dependent Claim
16 words
The electro-optical system of claim 26, wherein said eye-tracking means comprises a CCd image detecting array.
Claim 39
Dependent Claim
16 words
The electro-optical system of claim 33, wherein said eye-tracking means comprises a CCD image detecting array.
Claim 40
Dependent Claim
241 words
An electro-optical system for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards the eyes of a driver having a field of view from aboard a vehicle, said electro-optical system comprising: an electro-optical element mounted aboard the vehicle and having an optically transparent surface including a plurality of pixels through which the field of view of the eyes of the driver passes, each said pixel having an controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards the eyes of the driver; image acquisition means for acquiring one or more images of said three-dimensional spatial scene within the field of view of the eyes of the driver; image processing means for processing said one or more acquired images and determining at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before reaching the eyes of the driver; and control means for actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards the eyes of the driver with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 41
Dependent Claim
241 words
An electro-optical system for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards the eyes of a driver having a field of view from aboard a vehicle, said electro-optical system comprising: an electro-optical element mounted aboard the vehicle and having an optically transparent surface including a plurality of pixels through which the field of view of the eyes of the driver passes, each said pixel having an controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards the eyes of the driver; image acquisition means for acquiring one or more images of said three-dimensional spatial scene within the field of view of the eyes of the driver; image processing means for processing said one or more acquired images and determining at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before reaching the eyes of the driver; and control means for actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards the eyes of the driver with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 42
Independent Claim
250 words
A method for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards the eyes of a driver having a field of view from aboard a vehicle, sad method comprising the steps: a) providing an electro-optical element at a desired distance from the eyes of the driver so that the field of view of the driver passes through said electro-optical element, said electro-optical element having an optically transparent surface including a plurality of pixels, each said pixel having a controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards the eyes of the driver; b) acquiring one or more images of the three-dimensional spatial scene within the field of view of the eyes of the driver; c) processing said one or more acquired images so as to determine at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before said incident light rays reach the eyes of the driver; and d) actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards the eyes of the driver with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 43
Independent Claim
250 words
A method for automatically reducing glare produced from a three-dimensional spatial scene by reducing the intensity of light rays propagating from points in the three-dimensional spatial scene towards the eyes of a driver having a field of view from aboard a vehicle, sad method comprising the steps: a) providing an electro-optical element at a desired distance from the eyes of the driver so that the field of view of the driver passes through said electro-optical element, said electro-optical element having an optically transparent surface including a plurality of pixels, each said pixel having a controllable light transmittance for selectively reducing the intensity of incident light rays propagating from one or more points in the three-dimensional spatial scene, through said pixel, then towards the eyes of the driver; b) acquiring one or more images of the three-dimensional spatial scene within the field of view of the eyes of the driver; c) processing said one or more acquired images so as to determine at which pixels the light transmittance is to be actively controlled in order to reduce the intensity of incident light rays by a selected amount before said incident light rays reach the eyes of the driver; and d) actively controlling the light transmittance of said determined pixels so that after incident light rays propagate through said determined pixels, the incident light rays propagate towards the eyes of the driver with an intensity reduced by said selected amount, so that glare produced from the three-dimensional spatial scene is automatically reduced.
Claim 44
Dependent Claim
20 words
A method of claim 39, wherein step (d) further comprises independently controlling the light transmittance of each said determined pixel.
Claim 45
Dependent Claim
32 words
The method of claim 39, where in step (a) said electro-optical element comprises an electrically addressable liquid crystal light valve, and wherein the light transmittance of each said pixel is independently controlled.
Claim 46
Dependent Claim
20 words
The method of claim 41, wherein step (d) further comprises independently controlling the light transmittance of each said determined pixel.
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