WO1987004396A1 - Screening method of blinding lights for vehicles - Google Patents

Screening method of blinding lights for vehicles Download PDF

Info

Publication number
WO1987004396A1
WO1987004396A1 PCT/KR1987/000002 KR8700002W WO8704396A1 WO 1987004396 A1 WO1987004396 A1 WO 1987004396A1 KR 8700002 W KR8700002 W KR 8700002W WO 8704396 A1 WO8704396 A1 WO 8704396A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicles
polarizing
lights
polarizers
blinding
Prior art date
Application number
PCT/KR1987/000002
Other languages
French (fr)
Inventor
Hyok Soo Kang
Original Assignee
Hyok Soo Kang
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 Hyok Soo Kang filed Critical Hyok Soo Kang
Publication of WO1987004396A1 publication Critical patent/WO1987004396A1/en

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.

Abstract

Method for eliminating the vision difficulties of the vehicle drivers caused by the blinding lights from the headlight of other vehicles comprising the procedures of transmitting one directional component of the lights from the headlight of a vehicle and then absorbing the said component of the lights in the other vehicle. For that purpose, each headlight of all the vehicles in use is provided in front of the light source with one or more polarizing sheets, namely, polarizers having certain direction of polarizing axes and also each of all the vehicles is provided 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. The said polarizing sheets may have polarizing grains embedded therein for establishing polarizing direction in the form of straight lines, wave lines or any other curved lines.

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.
PCT/KR1987/000002 1986-01-21 1987-01-21 Screening method of blinding lights for vehicles WO1987004396A1 (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
KR1986/367 1986-01-21

Publications (1)

Publication Number Publication Date
WO1987004396A1 true WO1987004396A1 (en) 1987-07-30

Family

ID=19248104

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1987/000002 WO1987004396A1 (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)

Cited By (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
ES2115541A1 (en) * 1996-07-12 1998-06-16 Parafly Sa Polarizers for the automotive field
EP0945303A1 (en) * 1998-02-19 1999-09-29 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
GB2527627A (en) * 2015-02-09 2015-12-30 Robin Aisher Headlight glare-reduction system
EP2993389A3 (en) * 2014-09-06 2016-10-05 Audi Ag Method for illuminating a surrounding of a motor vehicle, and motor vehicle headlamp

Citations (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

Patent Citations (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

Cited By (7)

* 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
ES2115541A1 (en) * 1996-07-12 1998-06-16 Parafly Sa Polarizers for the automotive field
EP0945303A1 (en) * 1998-02-19 1999-09-29 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
EP2993389A3 (en) * 2014-09-06 2016-10-05 Audi Ag Method for illuminating a surrounding of a motor vehicle, and motor vehicle headlamp
GB2527627A (en) * 2015-02-09 2015-12-30 Robin Aisher Headlight glare-reduction system
GB2527627B (en) * 2015-02-09 2019-03-06 Aisher Robin Headlight glare-reduction system

Also Published As

Publication number Publication date
KR870007005A (en) 1987-08-14
EP0257044A1 (en) 1988-03-02

Similar Documents

Publication Publication Date Title
EP0498143B1 (en) Active anti-dazzle device for the drivers of cars and other motor vehicles
US3961181A (en) Eye-shading means for automotive vehicle operators
CN100500461C (en) Anti-dazzle method and apparatus for automobiles
US4351557A (en) Light shield for vehicles having transparent members
WO1987004396A1 (en) Screening method of blinding lights for vehicles
WO1988008995A1 (en) Anti-glare eyeglasses
WO1990005071A1 (en) Anti-glare visor system
CN2811046Y (en) Automatic dazzle-proof device for car
US3704062A (en) Rear view optical system
CN212979829U (en) Photosensitive color-changing polarizing sun shield device for automobile
KR20180096126A (en) Shading plate for adjusting transmittance of light
GB2321629A (en) Anti_dazzle visor
JP2002036876A (en) Antiglare device against headlamp light from another vehicle
RU2082209C1 (en) Antidazzle device
JP3852034B2 (en) Vehicle sun visor
CN211905919U (en) On-vehicle sunshading board liquid crystal module of wisdom
CN2403625Y (en) Vehicle lamp with dimming means and light shelter during vehicles meeting at night
CN2428357Y (en) Polarized-light headlight of motor vehicle
JPH0520908U (en) Sun visor
JPS61135827A (en) Light dazzling protection device for automobile
KR890009163Y1 (en) Anti glare equipment for a vehicle
CN201002558Y (en) Automobile rear-view mirror with turning signal displaying function
CN2639092Y (en) Automobile electric rear-view device
CN2401393Y (en) Safety lighting device for motor vehicle
KR930001559Y1 (en) Sun visors for vehicles

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE