GB2137373A - Liquid crystal cell arrangement for antiglare glasses - Google Patents
Liquid crystal cell arrangement for antiglare glasses Download PDFInfo
- Publication number
- GB2137373A GB2137373A GB08407797A GB8407797A GB2137373A GB 2137373 A GB2137373 A GB 2137373A GB 08407797 A GB08407797 A GB 08407797A GB 8407797 A GB8407797 A GB 8407797A GB 2137373 A GB2137373 A GB 2137373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid crystal
- arrangement
- crystal cells
- crystal cell
- driving units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 57
- 210000002858 crystal cell Anatomy 0.000 title claims abstract description 56
- 239000011521 glass Substances 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000035945 sensitivity Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 210000004027 cell Anatomy 0.000 abstract description 4
- 235000019557 luminance Nutrition 0.000 description 30
- 238000002834 transmittance Methods 0.000 description 13
- 230000004313 glare Effects 0.000 description 11
- 230000004438 eyesight Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
- A61F9/06—Masks, shields or hoods for welders
- A61F9/065—Masks, shields or hoods for welders use of particular optical filters
- A61F9/067—Masks, shields or hoods for welders use of particular optical filters with variable transmission
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13318—Circuits comprising a photodetector
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Health & Medical Sciences (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Vascular Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Mathematical Physics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Liquid Crystal (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
An arrangement for driving liquid crystal cells in antiglare glasses, in which an adjustment to the varying light conditions is achieved on the basis of a self-acting transparency control. A plurality of first liquid crystal cells (7.1, 7.2, 7.3), form an eye shield and are electrically connected to light sensors (4.1, 4.2, 4.3) via driving units (5.1, 5.2, 5.3). A further liquid crystal cell (3) is disposed in front of the light sensors (4.1, 4.2, 4.3) and is arranged to act as a variable light filter. The cell (3) is connected via a driving unit (2) to an additional light sensor (1) which is arranged to control the cell (3) in response to the ambient luminance. <IMAGE>
Description
SPECIFICATION
Liquid crystal cell arrangement for antiglare glasses
The invention relates to a liquid crystal cell arrangement for antiglare glasses.
It is known in the art to achieve a transparency control of a plurality of liquid crystal cells dependant on the ambient light conditions using a reference signal detected by means of a light sensor. This reference signal represents a measure for the transparency control or, in fact, the controlling quantity for the latter. Consequently, this would mean that, for example in accordance with G.D.R. Patent application No. A 61 F 24377 ill, for the embodiment of a transparency control for separately drivable liquid crystal cells being treated as a whole functional unit, it is essential to compare the value of the incident luminous intensity to a predetermined value of the luminous intensity considered to be the glaring value, for every liquid crystal cell or each group of such cells being compared with the light sensor.This comparison results in a signal representing the difference between the value of the incident intensity and the glaring value. Because this signal is not in itself sufficient for driving the liquid crystal cells it must be amplified afterwards. Furthermore, it is known that the level of luminous intensity causing glare depends on the ambient light conditions. For example. a light source can be perceived as a glare during night-time, when the human eye can only cope with small brightness differences, whereas the same light source does not appear as a glare in the day-time when the human eye can cope with larger brightness differences. The glaring value is, hence, not a constant but a variable quantity, which is dependant on the ambient brightness conditions.
It is an object of the invention to provide an arrangement for driving liquid crystal cells in antiglare glasses, wherein the transparency control of the liquid crystal cells adjusts to the varying ambient light conditions automatically.
It is a further object of the invention to provide an arrangement for driving liquid crystal cells in antiglare glasses, which relates the luminances possibly causing a glare, automaticallty to the ambient light conditions.
According to the present invention, there is provided a liquid crystal arrangement for antiglare glasses, comprising a plurality of first liquid crystal cells, which form an eye shield and which are electrically connected to first light sensors via first
driving units, and an additional liquid crystal cell which is disposed in front of said first light sensor
and which is arranged to act as a variable filter, said
additional liquid crystal cell being connected, via a
second driving unit, to an additional light sensor which is adapted to respond to the ambient lumi
nance. Advantageously, each driving unit includes a
control member for setting the response threshold
of the arrangement and for aligning the transmission
coefficient of the driving units.
Advantageously, the sensitivities of the first and
additional light sensors are equal and the transmis
sion coefficients of the first and second driving units are equal, and the material of the liquid crystal cells forming the eye shield has a flatter electro-optical characteristic than that of the material of the liquid crystal cell acting as a variable filter.
Preferably, the sensitivities of the first light sensors which are electrically connected to the liquid crystal cells forming the eye shield are lower than that of the said additional light sensor for measuring the ambient luminance, the electro-optical character- istics of the liquid crystal cells being congruent and the transmission coefficients of the driving units being equal.
Advantageously, if the electro-optical characteristics of the liquid cells are congruent and the sensitivities of the light sensors are equal, the transmission coefficients of the driving units electric ally connected to the liquid crystal cells forming the eye shield, are lower than the transmission coefficient of that driving unit, which is electrically connected to the liquid crystal cell acting as a variable filter.
To relate a luminance which might cause a glare to the ambient average luminance, it is necessary for the transmittance of the liquid crystal cell which is disposed in front of the light sensors to vary as a function of the ambient brightness in the same mode as the luminance, which might cause a glare, varies as a function of the ambient luminance. Hence, it is an advantage to set a response threshold for the liquid crystal cells of the eye shield, with the exceeding of the threshold being equivalentto a glare effect and causing the liquid crystal cells to be obscured in dependence on the luminance.
It can occur that one and the same signal value, which causes the liquid crystal cells of the eye shield to be obscured, corresponds to different luminances, each causing a glare, in dependence on the ambient luminance.
Advantageously, the entire driving process is reduced to a comparison to a fixed value, which is the response threshold.
It is an advantage of the present arrangement that it can be achieved using simple electronics. There is no comparing of the measured parameters to state differences between them and, hence, no differential amplifier is necessary. These features permit, advantageously, the use of the portable arrangement under constantly varying light conditions. Adaption to the relevant light conditions is carried out automatically. Additionally, it is an advantage of the present arrangement that it permits the embodiments wherein the compensation of manufacturing tolerances can be achieved by the use of control members provided in the driving units.
Furthermore, the arrangement is particularly appropiate for both day and night usage of the antiglare glasses since the varying ambient light conditions are automatically taken into account.
The present invention will now be described further hereinafter, by way of example only, with
reference to the accompanying drawings, in which:
Figure 1 shows an arrangement in accordance with the present invention for driving a plurality of
liquid crystal cells in antiglare glasses;
Figure 2 shows a diagrammatic representation of the transmittance T3 as a function of the ambient luminance bu, Figure 3 shows the relation between the ambient luminance bu and the luminance ~B being perceived as a glare dependant on the time t; and
Figure 4 shows the transmittance T7 as a function of the luminance ~A in a restricted angle of vision range.
In Figure 1 the schematic representation of an arrangement for driving a plurality of liquid crystal cells in antiglare glasses is shown. The antiglare glasses consist of eye shields mounted in a frame (not visible) with arms (not visible). The eye shields are formed from liquid crystal cells 7.1, 7.2, 7.3. Light sensors 1,4.1,4.2,4.3, oriented towards the optical viewing direction, as well as associated driving units 5.1, 5.2, 5.3, are mounted in the frame of the eye shields. A liquid crystal cell 3, acting as a variable filter, is disposed in front of the light sensors 4.1,4.2, 4.3, and, as a result, the incident light L impinges as a filtered attenuated light 10a on the light sensors 4.1, 4.2, 4.3.The light sensor 1 for measuring the ambient luminance is not covered by the liquid crystal cell 3, but, via signal lines 9a (input), 9b (output) and a driving unit 2, is directly electrically connected to it. The light sensors 4.1, 4.2, 4.3, in turn, are connected to the relevant sections of the liquid crystal cells 7.1,7.2,7.3 forming the eye shield for the human eye 6.In detail, this electrical connection is embodied as follows: the light sensors 4.1,4.2,4.3 are connected to the driving units 5.1, 5.2, 5.3 via the respective signal lines 10b, and the driving units 5.1, 5.2, 5.3, in turn, are connected to the liquid crystal cells 7.1,7.2,7.3 via the signal lines 10c. A power supply unit 8 is connected to the driving units 2 and 5.1,5.2,5.3 via signal lines 8a. The driving units 2, 5.1, 5.2, 5.3 each include a control member (not visible) for aligning the transmission coefficient of said driving units.
The representations in Figures 2 to 4 are used to illustrate the mode of operation of the abovedescribed arrangement.
The light sensors 4.1,4.2,4.3 and the appertaining driving units 5.1,5.2,5.3 are matched to the liquid crystal cells 7.1, 7.2,7.3 such that, when a preset threshold value of light intensity is exceeded, a signal is delivered by the relevant driving units 5.1, 5.2, 5.3, which effects a variation of the transmittance T7 of the affected sections of the liquid crystal cells 7.1, 7.2, 7.3. Above the threshold value of light intensity, the transmittance 77 is varied in depend ence on the luminance ~B of the glaring radiation.
The filtered light impinging onto the light sensors 4.1,4.2,4.3 is controlled in dependence on the ambient luminance bu by the light sensor 1, the driving unit 2 and the liquid crystal cell 3. Figure 2 shows a diagrammatic representation of the transmittance 73 as a function of the ambient luminance bu
As is known, the luminance ~B being perceived as a glare depends on the ambient luminance bu, as it is represented in Figure 3 in dependence on the time t.This means that in a restricted angle of vision range and at a certain value of the ambient luminance ~u, the luminance ~A is only then perceived as glaring if it exceeds the value ~B. In the graph of Figure 4, the luminances ~A is subdivided into sections 4)A < < > B at a certain ambient luminance 4)u and #A > ~B at a certain ambient luminance ~u, the graph indicating the relation between ~A and 77.
Since the light sensors 4.1, 4.2, 4.3, changing the transmittance 7 of the liquid crystal cells 7.1,7.2,7.3, are optically coupled with the liquid crystal cell 3 acting as a filter, and the transmittance 73 of the liquid crystal cell 3 changes as a function of the ambient luminance 4u, it is achieved that the transmittance 77 changes in dependence on the luminance ~A, occuring in a restricted angle of vision range, and on the ambient luminance ~u provided that ~A > ~B for a certain Qj,.Hence, the arrangement is automatically adjusted to the specific light conditions L, and, for that purpose, the required dependent between the ambient luminance bu and the luminance ~B being perceived as a glare, is obtained by a simple optical coupling system.
Possibilities for obtaining the required dependence between ~A and ~B, which are predetermined by the transmittance of liquid crystal cell 3: 73r and the transmittance 77 Of the liquid crystal cells 7.1, 7.2, 7.3, dependent on ~u or ~A, respectively, are given in the form of the sensitivities of the light sensors 1, 4.1, 4.2, 4.3, the transmission coefficients of the driving units 2, 5.1,5.2, 5.3, and the behaviour of the electro-optical characteristic of the liquid crystal cells 7.1,7.2,7.3. The said required dependencies are obtained by adjusting the transmission coefficients.
This is carried out, first of all, by means of the control members (not visible) of the driving units 2, 5.1, 5.2, 5.3. At the same time, the response threshold of the liquid crystal cells 7.1, 7.2,7.3 is is set, with the exceeding of the response threshold effecting a variation of the transmittance 77. The transmittance 73 of the liquid crystal cell 3 has no response threshold, as is indicated in Figure 2.
Claims (6)
1. A liquid crystal cell arrangement for antiglare glasses, comprising a plurality of first liquid crystal cells, which form an eye shield and which are electrically connected to first light sensors via first driving units and an additional liquid crystal cell which is disposed in front of said first light sensors and which is arranged to act as a variable filter, said additional liquid crystal cell being connected, via a second driving unit, to an additional light sensor which is adapted to respond to the ambient luminance.
2. An arrangement as claimed in claim 1, wherein the first and second driving units each include a control member for setting the response threshold of the arrangement and for adjusting the transmission coefficient of the driving units.
3. An arrangement as claimed in claim 1, wherein the sensitivities of the first and additional light sensors are equal and the transmission coefficients of the first and second driving units are equal and the material of the liquid crystal cells forming the eye shield has a flatter electro-optical characteristic than thatofthe material of the liquid crystal cell acting as a variable filter.
4. An arrangement as claimed claim 1, wherein the sensitivities of the first light sensors which are electrically connected to the liquid crystal cells forming the eye shield are lower than that of the said additional light sensor for measuring the ambient luminance, the electro-optical characteristics of the liquid crystal cells being congruent and the transmission coefficients of the driving units being equal.
5. An arrangement as claimed in claim 1, wherein the transmission coefficients of the first driving units electrically connected to the liquid crystal cells forming the eye shield are lower than the transmission coefficient of said second driving unit, which is electrically connected to the liquid crystal cell acting as a variable filter, the electro-optical characteristics of the first and additional liquid crystal cells being congruent and the sensitivities of the first and second light sensors being equal.
6. A liquid crystal cell arrangement for antiglare glasses, constructed and adapted to operate substantially as herein described with reference to and as illustrated by the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD24935683A DD228953A3 (en) | 1983-03-29 | 1983-03-29 | ARRANGEMENT FOR OPERATING BLADE GOGGLES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8407797D0 GB8407797D0 (en) | 1984-05-02 |
| GB2137373A true GB2137373A (en) | 1984-10-03 |
Family
ID=5546049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08407797A Withdrawn GB2137373A (en) | 1983-03-29 | 1984-03-26 | Liquid crystal cell arrangement for antiglare glasses |
Country Status (5)
| Country | Link |
|---|---|
| CS (1) | CS272258B1 (en) |
| DD (1) | DD228953A3 (en) |
| DE (1) | DE3404748A1 (en) |
| GB (1) | GB2137373A (en) |
| SU (1) | SU1446590A1 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0642776A1 (en) * | 1993-09-13 | 1995-03-15 | Optrel Ag | Method to control an anti-glare device and anti-glare device used in the method |
| US5550677A (en) * | 1993-02-26 | 1996-08-27 | Donnelly Corporation | Automatic rearview mirror system using a photosensor array |
| US5671035A (en) * | 1995-06-07 | 1997-09-23 | Barnes; Elwood E. | Light intensity reduction apparatus and method |
| GB2341965A (en) * | 1998-09-24 | 2000-03-29 | Secr Defence | Pattern recognition |
| US6302545B1 (en) | 1993-02-26 | 2001-10-16 | Donnelly Corporation | Vehicle control system and method |
| US7339149B1 (en) | 1993-02-26 | 2008-03-04 | Donnelly Corporation | Vehicle headlight control using imaging sensor |
| US7585068B2 (en) | 2004-12-03 | 2009-09-08 | Dynamic Eye, Inc. | Method and apparatus for calibrating glare-shielding glasses |
| US7655894B2 (en) | 1996-03-25 | 2010-02-02 | Donnelly Corporation | Vehicular image sensing system |
| US7859565B2 (en) | 1993-02-26 | 2010-12-28 | Donnelly Corporation | Vision system for a vehicle including image processor |
| US7972045B2 (en) | 2006-08-11 | 2011-07-05 | Donnelly Corporation | Automatic headlamp control system |
| US8017898B2 (en) | 2007-08-17 | 2011-09-13 | Magna Electronics Inc. | Vehicular imaging system in an automatic headlamp control system |
| US8063759B2 (en) | 1993-02-26 | 2011-11-22 | Donnelly Corporation | Vehicle vision system |
| WO2015169166A1 (en) * | 2014-05-04 | 2015-11-12 | 丹阳博来腾光电科技有限公司 | Anti-glare lens, device, spectacles, and method against vehicle lamplight |
| US9509957B2 (en) | 2008-07-24 | 2016-11-29 | Magna Electronics Inc. | Vehicle imaging system |
| US9940528B2 (en) | 2004-12-23 | 2018-04-10 | Magna Electronics Inc. | Driver assistance system for vehicle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4136588C2 (en) * | 1991-11-07 | 1993-11-18 | Deutsche Aerospace | Device for protection against excessive optical power and energy densities |
| DE19714434A1 (en) * | 1997-04-08 | 1998-10-15 | Armin Schaeuble | Selective electronic photo-protective spectacles |
-
1983
- 1983-03-29 DD DD24935683A patent/DD228953A3/en not_active IP Right Cessation
-
1984
- 1984-02-10 DE DE19843404748 patent/DE3404748A1/en not_active Withdrawn
- 1984-02-20 SU SU847773327A patent/SU1446590A1/en active
- 1984-03-01 CS CS147884A patent/CS272258B1/en unknown
- 1984-03-26 GB GB08407797A patent/GB2137373A/en not_active Withdrawn
Cited By (51)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7339149B1 (en) | 1993-02-26 | 2008-03-04 | Donnelly Corporation | Vehicle headlight control using imaging sensor |
| US6523964B2 (en) | 1993-02-26 | 2003-02-25 | Donnelly Corporation | Vehicle control system and method |
| US8098142B2 (en) | 1993-02-26 | 2012-01-17 | Magna Mirrors Of America, Inc. | Vehicle monitoring system |
| US7859565B2 (en) | 1993-02-26 | 2010-12-28 | Donnelly Corporation | Vision system for a vehicle including image processor |
| US8203440B2 (en) | 1993-02-26 | 2012-06-19 | Donnelly Corporation | Vehicular vision system |
| US6302545B1 (en) | 1993-02-26 | 2001-10-16 | Donnelly Corporation | Vehicle control system and method |
| US7325934B2 (en) | 1993-02-26 | 2008-02-05 | Donnelly Corporation | Image sensing system for a vehicle |
| US6802617B2 (en) | 1993-02-26 | 2004-10-12 | Donnelly Corporation | Vehicle image capture system |
| US6953253B2 (en) | 1993-02-26 | 2005-10-11 | Donnelly Corporation | Vehicle photosensing control system |
| US7311406B2 (en) | 1993-02-26 | 2007-12-25 | Donnelly Corporation | Image sensing system for a vehicle |
| US5550677A (en) * | 1993-02-26 | 1996-08-27 | Donnelly Corporation | Automatic rearview mirror system using a photosensor array |
| US7325935B2 (en) | 1993-02-26 | 2008-02-05 | Donnelly Corporation | Image sensing system for a vehicle |
| US7402786B2 (en) | 1993-02-26 | 2008-07-22 | Donnelly Corporation | Vehicle headlight control using imaging sensor with spectral filtering |
| US7344261B2 (en) | 1993-02-26 | 2008-03-18 | Donnelly Corporation | Vehicular vision system |
| US7380948B2 (en) | 1993-02-26 | 2008-06-03 | Donnelly Corporation | Image sensing system for a vehicle |
| US7388182B2 (en) | 1993-02-26 | 2008-06-17 | Donnelly Corporation | Image sensing system for controlling an accessory or headlight of a vehicle |
| US8063759B2 (en) | 1993-02-26 | 2011-11-22 | Donnelly Corporation | Vehicle vision system |
| US7423248B2 (en) | 1993-02-26 | 2008-09-09 | Donnelly Corporation | Automatic exterior light control for a vehicle |
| US7425076B2 (en) | 1993-02-26 | 2008-09-16 | Donnelly Corporation | Vision system for a vehicle |
| US7459664B2 (en) | 1993-02-26 | 2008-12-02 | Donnelly Corporation | Image sensing system for a vehicle |
| US8314689B2 (en) | 1993-02-26 | 2012-11-20 | Donnelly Corporation | Vehicular vision system |
| EP0642776A1 (en) * | 1993-09-13 | 1995-03-15 | Optrel Ag | Method to control an anti-glare device and anti-glare device used in the method |
| US5841507A (en) * | 1995-06-07 | 1998-11-24 | Barnes; Elwood E. | Light intensity reduction apparatus and method |
| US5671035A (en) * | 1995-06-07 | 1997-09-23 | Barnes; Elwood E. | Light intensity reduction apparatus and method |
| US8492698B2 (en) | 1996-03-25 | 2013-07-23 | Donnelly Corporation | Driver assistance system for a vehicle |
| US8222588B2 (en) | 1996-03-25 | 2012-07-17 | Donnelly Corporation | Vehicular image sensing system |
| US7994462B2 (en) | 1996-03-25 | 2011-08-09 | Donnelly Corporation | Vehicular image sensing system |
| US8481910B2 (en) | 1996-03-25 | 2013-07-09 | Donnelly Corporation | Vehicular image sensing system |
| US7655894B2 (en) | 1996-03-25 | 2010-02-02 | Donnelly Corporation | Vehicular image sensing system |
| US8324552B2 (en) | 1996-03-25 | 2012-12-04 | Donnelly Corporation | Vehicular image sensing system |
| GB2341965A (en) * | 1998-09-24 | 2000-03-29 | Secr Defence | Pattern recognition |
| US8629768B2 (en) | 1999-08-12 | 2014-01-14 | Donnelly Corporation | Vehicle vision system |
| US8203443B2 (en) | 1999-08-12 | 2012-06-19 | Donnelly Corporation | Vehicle vision system |
| US7585068B2 (en) | 2004-12-03 | 2009-09-08 | Dynamic Eye, Inc. | Method and apparatus for calibrating glare-shielding glasses |
| US9940528B2 (en) | 2004-12-23 | 2018-04-10 | Magna Electronics Inc. | Driver assistance system for vehicle |
| US12118806B2 (en) | 2004-12-23 | 2024-10-15 | Magna Electronics Inc. | Vehicular imaging system |
| US11308720B2 (en) | 2004-12-23 | 2022-04-19 | Magna Electronics Inc. | Vehicular imaging system |
| US10509972B2 (en) | 2004-12-23 | 2019-12-17 | Magna Electronics Inc. | Vehicular vision system |
| US8434919B2 (en) | 2006-08-11 | 2013-05-07 | Donnelly Corporation | Adaptive forward lighting system for vehicle |
| US8162518B2 (en) | 2006-08-11 | 2012-04-24 | Donnelly Corporation | Adaptive forward lighting system for vehicle |
| US7972045B2 (en) | 2006-08-11 | 2011-07-05 | Donnelly Corporation | Automatic headlamp control system |
| US10726578B2 (en) | 2007-08-17 | 2020-07-28 | Magna Electronics Inc. | Vehicular imaging system with blockage determination and misalignment correction |
| US9972100B2 (en) | 2007-08-17 | 2018-05-15 | Magna Electronics Inc. | Vehicular imaging system comprising an imaging device with a single image sensor and image processor for determining a totally blocked state or partially blocked state of the single image sensor as well as an automatic correction for misalignment of the imaging device |
| US9018577B2 (en) | 2007-08-17 | 2015-04-28 | Magna Electronics Inc. | Vehicular imaging system with camera misalignment correction and capturing image data at different resolution levels dependent on distance to object in field of view |
| US11328447B2 (en) | 2007-08-17 | 2022-05-10 | Magna Electronics Inc. | Method of blockage determination and misalignment correction for vehicular vision system |
| US11908166B2 (en) | 2007-08-17 | 2024-02-20 | Magna Electronics Inc. | Vehicular imaging system with misalignment correction of camera |
| US8017898B2 (en) | 2007-08-17 | 2011-09-13 | Magna Electronics Inc. | Vehicular imaging system in an automatic headlamp control system |
| US9509957B2 (en) | 2008-07-24 | 2016-11-29 | Magna Electronics Inc. | Vehicle imaging system |
| US11091105B2 (en) | 2008-07-24 | 2021-08-17 | Magna Electronics Inc. | Vehicle vision system |
| US12005845B2 (en) | 2008-07-24 | 2024-06-11 | Magna Electronics Inc. | Vehicular control system |
| WO2015169166A1 (en) * | 2014-05-04 | 2015-11-12 | 丹阳博来腾光电科技有限公司 | Anti-glare lens, device, spectacles, and method against vehicle lamplight |
Also Published As
| Publication number | Publication date |
|---|---|
| CS272258B1 (en) | 1991-01-15 |
| DD228953A3 (en) | 1985-10-23 |
| DE3404748A1 (en) | 1984-10-04 |
| GB8407797D0 (en) | 1984-05-02 |
| SU1446590A1 (en) | 1988-12-23 |
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