EP0257044A1 - Screening method of blinding lights for vehicles - Google Patents

Screening method of blinding lights for vehicles

Info

Publication number
EP0257044A1
EP0257044A1 EP87900899A EP87900899A EP0257044A1 EP 0257044 A1 EP0257044 A1 EP 0257044A1 EP 87900899 A EP87900899 A EP 87900899A EP 87900899 A EP87900899 A EP 87900899A EP 0257044 A1 EP0257044 A1 EP 0257044A1
Authority
EP
European Patent Office
Prior art keywords
vehicles
polarizing
lights
polarizers
analyzers
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Withdrawn
Application number
EP87900899A
Other languages
German (de)
French (fr)
Inventor
Hyok S. Kang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0257044A1 publication Critical patent/EP0257044A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/12—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/135—Polarised
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light

Definitions

  • This invention relates to a, method for screening the blinding lights from vehicles and particularly to a method for filtering out the blinding glares of the headlights from the surrounding vehicles by utilizing plurality of polarizing sheets so as to relieve the vision difficulties of the vehicle drivers from blinding lights.
  • Golden to provide a light shield for shading the eyes of vehicle drivers consisting of a laterally extending series of contiguous vertically disposed, electri- cally darkenable cells or zones such as liquid crystals, each of which cells or zones is individually cross associate clectrically with photosensitive sensor cells and has characteristic that it is transparent when no voltage is applied to it, but that it becomes progressively opaque with increase of applied voltage.
  • the applied voltage is controlled by the said photosensitive cells whose electrical resistance increases as intensity of light exposure diminishes.
  • the apparatus any way, has very complicated structure and does not render satisfactory vision of drivers. Further, it continuously consumes electricity when in use.
  • the headlights of the vehicle are provided with photosensitive sensors to decrease the intensity of lightness of the headlight upon exposure of the lights of approaching car or to lower the direction of the ray from the headlight.
  • the road is provided with light blocking fence constructed along the center line of the road so as to block off the light from the headlight of vehicles approaching from the opposite side of the road.
  • photosensitive sensor equipped headlight does not operate immediately and sensitively enough to provide safe and convenient driving and the latter, light blocking fence, is not adquate for construction on the road other than the highway and, moreover, needs enormous construction cost.
  • Another object of this invention is to provide a method for filtering out the lights of the headlights from all directions by simply using a pair of polarized sheets.
  • the present invention comprises procedures of transmitting one directional conponent of the lights from the headlights of vehicles and then absorbing the said component of the lights in the other vehicle so as to eliminate the vision difficulties of the vehicle driver that would otherwise arise by the blinding lights from the surrounding vehicles by providing each headlight of all the vehicles in use, in front of the blinding light sources, with one or more polarizing sheets, namely, "polarizers” which have certain direction of polarizing axes and also providing each of all the vehicles, ahead of the driver's eyes, with one or more polarizing sheets, namely, "analyzers” whose polarizing axes are substantially normal or neary normal to those of polarizers.
  • the polarizing grains that is, the long-chain molecules which are embedded within the polarizing sheets to establish polarizing direction may be in the form of straight lines, wave lines or any other curved lines that can polarize the light.
  • Fig. 1 is a perspective view of a car embodyin ⁇ the present invention, with parts broken away; and Fig. 2 is a perpective view of a pair of spectacles embodying the present invention.
  • a car 1 having two headlights whose cover lense 3 mounted on the housing thereof and in front of the light source 2 is made of polarizing glass with substantially vertical polarizing axis and also having some portion 6 of the windshield 4, ahead of the driver's eyes, is made of polarizing glass of substantially horizontal polarizing axis.
  • the cover lense 3 of the headlight housing and/or some' ortion 6 of the windshield in front of the driver's eyes may be covered by sheets of commercial polarizing material called Polaroid instead of making them of polarizing glass thereby constitut- ing ' the "polarizer” and “analyzer” respectively.
  • the analyzer may be replaced by a polarizing visor 5 or a pair of spectacles 7 provided with polarizing sheets as shown in Fig. 3.
  • the back mirrors of the car may also preferrable to provide the back mirrors of the car with polarizing sheets attached over the surface thereof where blinding lights from other cars following behind reflect.
  • the polarizing sheet may be attached on the surfaces of the door window glass and rear windshield of the car.
  • the "polarizer" may be mounted in front of other light source on the road besides the headlights of vehicles, such as street lamps ⁇ so as to polarize the lights therefrom.
  • polarizers will transmit only those wavetrain components of the lights from headlights whose electric vectors vibrate parallel to the polarizing axes of the polarizers, thereby polarizing the lights. And then the analyzers equipped in the other vehicle and having the polarizing axes perpendicular to those of the polarizers obsorb the polarized lights so that the blinding lights can not any more reach the driver's eyes.
  • the material of the polarizing sheets of this invention may have the polarizing grains in the from of wave lines or any other curved lines to establish polarizing direction.
  • the polarizing sheets having polarizing grains in the form of wave lines are used as polarizer and/or analyzer, the intensity of transmitted lights directly from the headlight of other vehicles could be substantially constant to the driver's eyes even in the case of rolling of the vehicles travelling on the irregularly laterally sloped road.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ophthalmology & Optometry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Polarising Elements (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Procédé permettant d'éliminer les difficultés de vision des conducteurs de véhicules automobiles, provoquées par les faisceaux lumineux éblouissants émis par les phares des autres véhicules. Le procédé consiste à ne transmettre qu'une composante directionnelle des faisceaux lumineux émis par les phares d'un véhicule et à absorber ensuite cette composante lumineuse dans l'autre véhicule. A cet effet, chaque projecteur de tous les véhicules en circulation comporte, devant la source de lumière, une ou plusieurs feuilles polarisantes, c'est-à-dire des polariseurs dont les axes de polarisation présentent une certaine direction. Chaque véhicule est également pourvu d'une ou plusieurs feuilles polarisantes placées devant les yeux du conducteur, ces feuilles constituant des analyseurs dont les axes de polarisation sont essentiellement perpendiculaires ou presque perpendiculaires aux axes des polariseurs. Lesdites feuilles polarisantes peuvent comporter des grains polarisants noyés dans la masse et déterminant des directions de polarisation, sous la forme de lignes droites, de lignes ondulées ou de toute autre ligne courbe.Method for eliminating vision difficulties for drivers of motor vehicles, caused by dazzling light beams emitted by the headlights of other vehicles. The method consists in transmitting only a directional component of the light beams emitted by the headlights of a vehicle and then absorbing this light component in the other vehicle. For this purpose, each headlamp of all the vehicles in circulation comprises, in front of the light source, one or more polarizing sheets, that is to say polarizers whose axes of polarization have a certain direction. Each vehicle is also provided with one or more polarizing sheets placed before the driver's eyes, these sheets constituting analyzers whose axes of polarization are essentially perpendicular or almost perpendicular to the axes of the polarizers. Said polarizing sheets may comprise polarizing grains embedded in the mass and determining directions of polarization, in the form of straight lines, wavy lines or any other curved line.

Description

5CREENING METHOD OF BLINDING LIGHTS FOR VEHICLES
Technical Fields
This invention relates to a, method for screening the blinding lights from vehicles and particularly to a method for filtering out the blinding glares of the headlights from the surrounding vehicles by utilizing plurality of polarizing sheets so as to relieve the vision difficulties of the vehicle drivers from blinding lights.
Background of the Invention
Various techniques for relieving the vision diffi¬ culties of the vehicle drivers caused by the blinding lights from the headlights of other vehicles have been developed. Currently, most automobiles in use have sun visors made of transparent coloured plastic installed so as to be rotatable vertically downward from its non-use position parallel to the plane of the automobile roof to a position partially obstructing the glare light from the oncoming cars that might otherwise deleteriously affect the driver's vision. However, this conventional visor has a number of drawbacks. When the oncoming cars on the opposite side appear, in order to rotate the visor to the operative posi¬ tion, the driver should manually handle the visor with one hand driving the car with the other hand. On the other hand, if there are vehicles approaching in line on the oppo¬ site side, the visor should be always kept in the operative position so that the vision of the driver is somewhat impared for observing other objects on the road which is quite necessary for safe driving operation. In an attempt to overcome these and other deficiencies, it has been proposed in U.S.Pat. No.3, 61,181 to Eddie R. Golden to provide a light shield for shading the eyes of vehicle drivers consisting of a laterally extending series of contiguous vertically disposed, electri- cally darkenable cells or zones such as liquid crystals, each of which cells or zones is individually cross associate clectrically with photosensitive sensor cells and has characteristic that it is transparent when no voltage is applied to it, but that it becomes progressively opaque with increase of applied voltage. The applied voltage is controlled by the said photosensitive cells whose electrical resistance increases as intensity of light exposure diminishes. The apparatus, any way, has very complicated structure and does not render satisfactory vision of drivers. Further, it continuously consumes electricity when in use. As an alternative to the above, it has been also proposed that the headlights of the vehicle are provided with photosensitive sensors to decrease the intensity of lightness of the headlight upon exposure of the lights of approaching car or to lower the direction of the ray from the headlight. As another alternative for that purpose, it has been worked that the road is provided with light blocking fence constructed along the center line of the road so as to block off the light from the headlight of vehicles approaching from the opposite side of the road. However, photosensitive sensor equipped headlight does not operate immediately and sensitively enough to provide safe and convenient driving and the latter, light blocking fence, is not adquate for construction on the road other than the highway and, moreover, needs enormous construction cost. In addition to the above deficiencies, most of the conventional methods connot solve the vision difficulties of the vehicle drivers caused by the lights from the head¬ lights of the cars following behind which are reflected through the back mirrors. It is therefore an object of this invention to provide a screening method of blinding light for vehicles which overcomes many of the" above-described problems.
Another object of this invention is to provide a method for filtering out the lights of the headlights from all directions by simply using a pair of polarized sheets.
It is a further object of this invention to provide a screening method of blining lights for vehicles which evenly filters out the lights from the headlights of other vchiclcs on the road the lateral slope of which varies irregularly to cause the rolling of the vehicles.
Summary of the Invention
In order to accomplish the-above objects, the present invention comprises procedures of transmitting one directional conponent of the lights from the headlights of vehicles and then absorbing the said component of the lights in the other vehicle so as to eliminate the vision difficulties of the vehicle driver that would otherwise arise by the blinding lights from the surrounding vehicles by providing each headlight of all the vehicles in use, in front of the blinding light sources, with one or more polarizing sheets, namely, "polarizers" which have certain direction of polarizing axes and also providing each of all the vehicles, ahead of the driver's eyes, with one or more polarizing sheets, namely, "analyzers" whose polarizing axes are substantially normal or neary normal to those of polarizers.
In the present invention, the polarizing grains, that is, the long-chain molecules which are embedded within the polarizing sheets to establish polarizing direction may be in the form of straight lines, wave lines or any other curved lines that can polarize the light. Embodiments of the method in accordance with the present invention will now be described by way of examples and with reference to the accompanying drawings.
Brief Deseription of the Drawings
Fig. 1 is a perspective view of a car embodyinσ the present invention, with parts broken away; and Fig. 2 is a perpective view of a pair of spectacles embodying the present invention.
Embodiments of the Invention
Referring to Fig. 1, there is shown a car 1 having two headlights whose cover lense 3 mounted on the housing thereof and in front of the light source 2 is made of polarizing glass with substantially vertical polarizing axis and also having some portion 6 of the windshield 4, ahead of the driver's eyes, is made of polarizing glass of substantially horizontal polarizing axis. As an alternative to"the above, the cover lense 3 of the headlight housing and/or some' ortion 6 of the windshield in front of the driver's eyes may be covered by sheets of commercial polarizing material called Polaroid instead of making them of polarizing glass thereby constitut- ing'the "polarizer" and "analyzer" respectively.
As another alternative, the analyzer may be replaced by a polarizing visor 5 or a pair of spectacles 7 provided with polarizing sheets as shown in Fig. 3.
It is also preferrable to provide the back mirrors of the car with polarizing sheets attached over the surface thereof where blinding lights from other cars following behind reflect. As an alternative to polarizing back mirrors, the polarizing sheet may be attached on the surfaces of the door window glass and rear windshield of the car. It will be appreciated that, according to the present invention, the "polarizer" may be mounted in front of other light source on the road besides the headlights of vehicles, such as street lamps^ so as to polarize the lights therefrom. When all the vehicles in use embody the present invention, the operation of this invention is as follows. The polarizing sheets mounted in front of the headlights of. a vehicle i.e., polarizers will transmit only those wavetrain components of the lights from headlights whose electric vectors vibrate parallel to the polarizing axes of the polarizers, thereby polarizing the lights. And then the analyzers equipped in the other vehicle and having the polarizing axes perpendicular to those of the polarizers obsorb the polarized lights so that the blinding lights can not any more reach the driver's eyes.
As indicated above, the material of the polarizing sheets of this invention may have the polarizing grains in the from of wave lines or any other curved lines to establish polarizing direction. When the polarizing sheets having polarizing grains in the form of wave lines are used as polarizer and/or analyzer, the intensity of transmitted lights directly from the headlight of other vehicles could be substantially constant to the driver's eyes even in the case of rolling of the vehicles travelling on the irregularly laterally sloped road.

Claims

1. Λ screening method of blinding lights for vehicles comprising the procedures of transmittinσ one directional component of the lights from the headlights of vehicles and then absorbing the said component of the lights in other vehicles by providing each headliσht of all the vehicles in use, in front of the light source, with one or more polarizing sheets, namely, polarizers having certain direction of polarizing axes and also providing each of a.ll the vehicles, ahead of the driver's eyes, with one or more polarizing sheets, namely, analyzers whose polarizing axes are substantially normal or nearly normal to those of the polarizers.
2. The screening method of blinding lights for vehicles as claimed in claim 1 characterized in that the polarizers and the analyzers, respectively, are cover lenses of the headlights and some portion of the windshield each of which is made of polarizing glass.
3. The screening .method of blinding lights for vehicles as claimed in claim 1 characterized in that the polarizers and/or the analyzers are Polariods covering over the surfeces of the cover lenses of ϊ he headlights and/or some portions of the windshield, door window glass or back mirrors.
4. The screening method of blinding lights for vehicles as claimed in claim 1 characterized in that the analyzers are polarizing visor.
5. The sereening method of blinding lights for vehicles as claimed in claim 1 characterized in that the analyzers are a pair of spectacles provided with polarizing sheets mounted thereon.
6. The screening method of blinding lights for vehicles as claimed in claim 1 characterized in that the polarizing sheets making the polarizers and/or analyzers have polarizing grains embedded therein for establishing the polarizing direction in the form of wave lines so as to make the transmitted intensity of the lights sub tantially constant to the driver's eyes even in the case of rolling of the vehicles running on the irregularly laterally loped road.
EP87900899A 1986-01-21 1987-01-21 Screening method of blinding lights for vehicles Withdrawn EP0257044A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019860000367A KR870007005A (en) 1986-01-21 1986-01-21 How to prevent visual disturbance caused by light beam when driving a vehicle
KR1986367 1986-01-21

Publications (1)

Publication Number Publication Date
EP0257044A1 true EP0257044A1 (en) 1988-03-02

Family

ID=19248104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87900899A Withdrawn EP0257044A1 (en) 1986-01-21 1987-01-21 Screening method of blinding lights for vehicles

Country Status (3)

Country Link
EP (1) EP0257044A1 (en)
KR (1) KR870007005A (en)
WO (1) WO1987004396A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278816A (en) * 1993-06-03 1994-12-14 Nicholas Andrew Grant Headlamp glare eliminator
ES2115541B1 (en) * 1996-07-12 1999-03-01 Parafly Sa AUTOMOTIVE POLARIZERS.
EP0945303B1 (en) * 1998-02-19 1999-10-20 Edmund Szybicki An electronically controlled lighting system for automotive vehicles providing a selective light non-visible to counter traffic drivers
DE102006013700B3 (en) * 2006-03-24 2007-10-11 Robert Bosch Gmbh Device for prevention of glare at vehicle by headlights of forthcoming vehicles, has sensor is arranged in optical path in polarization device, which executes light delay measuring for determining distance
DE102014013205A1 (en) * 2014-09-06 2016-03-10 Audi Ag Method for illuminating a surrounding area of a vehicle, headlight and motor vehicle
GB2527627B (en) * 2015-02-09 2019-03-06 Aisher Robin Headlight glare-reduction system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2102632A (en) * 1936-06-02 1937-12-21 Sheet Polarizer Company Inc Viewing screen for use in optical systems employing polarized light
FR876011A (en) * 1939-03-31 1942-10-12 Hugo Schneider Ag Analyzer for polarized headlight light, particularly in the form of a spectacle lens
US2370697A (en) * 1940-09-13 1945-03-06 American Optical Corp Optical means
GB702106A (en) * 1951-03-30 1954-01-06 Erwin Kasemann Improvements in motor vehicle lighting, with use of polarized light
US3042827A (en) * 1958-09-30 1962-07-03 Lopez Orlando Motor vehicle headlight construction and polarized glasses used therewith
DE2632592A1 (en) * 1976-06-28 1978-01-05 Kurt Frederico Dipl Ing Rueger Anti-dazzle system for road vehicle - has polarised head lamp lens and windscreen fitted in each vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8704396A1 *

Also Published As

Publication number Publication date
KR870007005A (en) 1987-08-14
WO1987004396A1 (en) 1987-07-30

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