WO2018132811A1 - Système et procédé d'atténuation de la lumière extérieure - Google Patents

Système et procédé d'atténuation de la lumière extérieure Download PDF

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Publication number
WO2018132811A1
WO2018132811A1 PCT/US2018/013799 US2018013799W WO2018132811A1 WO 2018132811 A1 WO2018132811 A1 WO 2018132811A1 US 2018013799 W US2018013799 W US 2018013799W WO 2018132811 A1 WO2018132811 A1 WO 2018132811A1
Authority
WO
WIPO (PCT)
Prior art keywords
processor
lcd
sensor
light source
external light
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.)
Ceased
Application number
PCT/US2018/013799
Other languages
English (en)
Inventor
Steven Robert RECKAMP
Alexander JEVTIC
Jomon JACOB
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.)
Aumovio Systems Inc
Original Assignee
Continental Automotive Systems Inc
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 Continental Automotive Systems Inc filed Critical Continental Automotive Systems Inc
Publication of WO2018132811A1 publication Critical patent/WO2018132811A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B60J3/04—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles adjustable in transparency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10504—Liquid crystal layer
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the technical field relates generally to systems for dimming a light external to a vehicle.
  • sun visors can be maneuvered into positions between the eyes of the occupants and the sun.
  • sun visors often block a substantial viewing area of the driver, thus potentially obscuring other hazards.
  • sun visors often require constant readjustment as the vehicle is in motion and the relative position of the sun with respect to the vehicle changes.
  • sun visors are typically useless when the sun is very low in the sky, e.g., near sunrise and sunset, and are not very helpful to protect the occupants from other external light sources, e.g., headlights of oncoming vehicles.
  • a dimming system for a vehicle includes a first sensor positioned to sense a position of an occupant of the vehicle and generate corresponding data.
  • the system also includes at least one processor in communication with the first sensor and configured to receive the data generated by the first sensor and determine a position of at least one eye of the occupant based at least partially on the data, generated by the first sensor.
  • the system further includes a second sensor configured to sense a field of view outside of the vehicle and generate corresponding data.
  • the at least one processor is in communication with the second sensor and configured to receive the
  • the system also includes a liquid crystal display (“LCD") disposed at least partially in a field of view of the occupant.
  • the LCD includes a plurality of liquid crystals configured to be selectively operated in response to a command.
  • the at least one processor is also configured to calculate an intersection location of the LCD and a line between the at least one eye of the occupant and the external light source.
  • the at least one processor is further configured to selectively command the LCD to activate at least one of the plurality of liquid crystals at or near the calculated intersection location.
  • a method of providing dimming of a light source external from a vehicle includes sensing a position of an occupant of the vehicle and generating corresponding data with a first sensor. The method also includes determining a position of at least one eye of the occupant based at least partially on the generated data utilizing a processor. The method further includes sensing a field of view- outside of the vehicle and generating corresponding data with a second sensor. The method also includes determining a position of an external light source in the field of view utilizing the at least one processor.
  • a liquid crystal display (“LCD”) is positioned at least partially in a field of view of the occupant, the LCD including a plurality of liquid crystals configured to be selectively operated in response to a command. The method further includes calculating an intersection location of the LCD and a line between the at least one eye of the occupant and the external light source. The method also includes selectively commanding the LCD to activate at least one of the plurality of liquid crystals at or near the calculated intersection location.
  • a dimming system includes at least one processor configured to receive data related to a position of at least one eye of a person.
  • a sensor is configured to sense a field of view of the person and generate corresponding data.
  • the system includes at least one processor in communication with the second sensor and configured to receive the data generated by the sensor and to determine a position of an external light source in the field of view based at least partially on the data.
  • the system also includes a liquid crystal display (“LCD”) disposed at least partially in the field of view of the person and including a plurality of liquid crystals configured to be selectively operated in response to a command.
  • the at least one processor is configured to receive data related to a position of at least one eye of a person.
  • a sensor is configured to sense a field of view of the person and generate corresponding data.
  • the system includes at least one processor in communication with the second sensor and configured to receive the data generated by the sensor and to determine a position of an external light source in the field of view based at least partially on the data.
  • the at least one processor is also configured to selectively command the LCD to activate at least one of the plurality of liquid crystals at or near the calculated intersection location.
  • Figure 1 is block diagram of a dimming system implemented in a vehicle with two sensors according to one exemplary embodiment
  • Figure 2 is a block diagram of a dimming system implementing in a vehicle with one sensor according to one exemplary embodiment
  • Figure 3 is perspective view of an external light source through a window of the vehicle according to one exemplary embodiment
  • FIG. 4 is a front view of a liquid crystal display (“LCD”) with a plurality of liquid crystals;
  • LCD liquid crystal display
  • Figure 5 is a side view of the LCD disposed adjacent to a window according to one exemplary embodiment
  • Figure 6 is a side view of the LCD disposed on a panel separate from the window according to one exemplary embodiment
  • Figure 7 is a front view of the LCD with a plurality of liquid crystals activated to dim an external light source according to the embodiment of Figure 5;
  • Figure 8 is a front view of the LCD with a plurality of liquid crystals activated to dim an external light source according to the embodiment of Figure 6;
  • Figure 9 is a close-up view of the LCD with liquid crystals activated in an alternating manner.
  • a dimming system 100 for a vehicle 102 is shown and described herein.
  • the system 100 shown and described herein may be implemented in any number of vehicles 102, including, but not limited to, automobiles, trucks, motorcycles, aircraft, boats, and spacecraft. Of course, those skilled in the art will appreciate other vehicles 102 which may be suited to benefit from the described system 100 as well as non-vehicle applications.
  • the dimming system 100 may also be integrated with buildings (not shown).
  • the vehicle 102 of the exemplary embodiment shown in Figure 1 includes at least one window 103.
  • the window 103 may be formed of one or more panes of glass (not separately numbered), e.g., tempered glass, as is readily appreciated by those skilled in the art.
  • the window 103 may be the windshield of the vehicle 02, side windows, the rear window, a sunroof, etc., as appreciated by those skilled in the art.
  • the system 100 includes a first sensor 104.
  • the first sensor 104 shown in this embodiment is a camera (not separately numbered) configured to receive an optical image and convert the optical image to digital data that may be conveyed by an electric signal.
  • the first sensor 104 may be implemented with other devices, in the exemplary embodiment of Figure 1, the first sensor 104 is disposed within the vehicle 102 and is positioned to sense an occupant position, i.e., a position where an occupant 105 of the vehicle 102 may be located.
  • the first sensor 104 may be positioned to sense a position of an operator (e.g., a driver) of the vehicle 102 and generate data corresponding sensing activities of the first sensor 104. It should be appreciated, of course, that the first sensor 104 may comprise multiple sensors and/or sensing elements.
  • the system 100 also includes at least one processor 106.
  • the at least one processor 106 may be a microprocessor, microcontroller, application specific integrated circuit ("ASIC"), or other device capable of performing calculations and/or executing instructions (i.e., running a program). It should be appreciated that the at least one processor 106 may be implemented as a single processor 106 or multiple processors 106, as appreciated by those skilled in the art. As such, the terms “at least one processor” 106, “processor "106, or “processors” may be utilized interchangeably within this disclosure. [0022] In the exemplary embodiment shown in Figure 1, the processor 106 is in communication with the first sensor 104 to receive the data from the first sensor 104.
  • ASIC application specific integrated circuit
  • the at least one processor 106 is also configured to determine a position of at least one eye of the occupant 105 of the vehicle 102 based on the data. That is, the processor 106 is configured to calculate a point in space, or relative to some known reference, of one or both of the eyes of the occupant 105 of the vehicle 102.
  • the at least one processor 106 may be integrated with the first sensor 104 and/or may be a separate component. Furthermore, it should be appreciated that the first sensor 04 may include one or more processors 106 while one or more additional processors 06 are separate from the first sensor 104.
  • the system 100 includes a user interface 200.
  • the user interface 200 is in communication with the at least one processor 106.
  • the user interface 200 also known as a human-machine interface, allows a user to input data.
  • the user interface 200 may include buttons, dials, switches, a touchscreen display, etc., to receive the input from the user, in this exemplary embodiment, the user interface 200 is configured to receive the data related to the position of the at least one eye of the occupant and send the data to the at least one processor 106.
  • the occupant of the vehicle could enter one or more values related to their height.
  • the first sensor 104 is not required.
  • the system 100 also includes a second sensor 108.
  • the second sensor 108 is configured to sense a field of v ew outside of the vehicle 102.
  • the second sensor 108 is a camera (not separately numbered) configured to receive an optical image and convert the optical image to data. The data may then be carried in an electrical and/or optical signal.
  • the second sensor 108 may be implemented with other devices other than the camera.
  • the system 100 may implement a plurality of second sensors 108 to sense multiple fields of view.
  • the plurality of second sensors 108 may provide a field of view in front of, and to the left and right of an occupant 105 of the vehicle 102.
  • the second sensor 108 may be positioned to view external light sources 300, i.e., light sources originating outside of the vehicle 102, as shown in Figure 3.
  • These external light sources 300 may include, but are not limited to, the sun, reflections of the snow (i.e., off snow), and headlights of other vehicles.
  • the second sensor 108 is in communication with the at least one processor 106.
  • the at least one processor 106 is configured to receive the data generated by the second sensor 108 and to determine a position of one or more external light sources 300 in the field of view. More particularly, the processor 106 is configured to determine a position of the external light source 300 with respect to the second sensor 108 and/or a known point on the vehicle 102.
  • the "position" of the external light source 300 may be a pair of angles denoting the horizontal and vertical offset of the external light source 300 from the second sensor 108.
  • the system 100 also includes a selectively translucent material (not seperately numbered), e.g., a liquid crystal display ("LCD") 112.
  • the LCD 1 12 includes a plurality of liquid crystals 400 as shown in Figure 4 and appreciated by those skilled in the art.
  • the liquid crystals 400 may be referred to as pixels.
  • the LCD 112 is disposed at least partially in the field of view of the occupant 105, as shown in Figures 5 and 6. That is, the LCD 112 is disposed between the occupant 105 and one of the windows 103.
  • the LCD 1 12 is configured to selectively activate at least one of the plurality of liquid crystals 400 in response to a command. It should be appreciated that other materials, besides the LCD 1 12, may potentially be utilized as the selectively translucent material.
  • the LCD 1 12 is disposed adjacent one of the windows 103 of the vehicle 102, e.g., the windshield, as shown in Figure 4.
  • the LCD 1 12 may be attached to the window 103.
  • the LCD 1 12 may be disposed on a side of the glass facing the passenger compartment.
  • the LCD 1 12 may be sandwiched between the two panes of glass.
  • the embodiment generates a natural viewing experience for the occupant 105 of the vehicle 102.
  • the LCD 112 may be disposed on a panel 600 separate from the window 103.
  • This embodiment may provide a cost advantage, as the LCD 112 need not be replaced should the window 103 of the vehicle 102 need to be replaced, e.g., due to a crack or chip in the glass.
  • the panel 600 may be hinged (not shown) to be folded away, e.g., when the driver chooses not to utilize the LCD 112.
  • the at least one processor 106 is in communication with the LCD 112.
  • the processor 106 is configured to calculate an intersection location 500 of the LCD 112 and a line 502 between the at least one eye of the occupant 105 and the external light source 300, as shown in Figures 5 and 6. That is, the processor 106 is configured to determine at least one liquid crystal 400 location on the LCD 112 that is between the eye(s) of the occupant 105 and the external light source 300.
  • the processor 106 is configured to selectively command the LCD 112 to activate at least one of the plurality of liquid crystals 400 at or near the calculated intersection location 500, as shown in Figures 7 and 8.
  • the LCD 1 12 dims a particular section of the window 103 of the vehicle 102.
  • the liquid crystals 400 of the LCD 112 block or reduce all or part of the external light source 300 from the vision of the occupant 105. This allows the occupant 105 to see more clearly through the remainder of the field of view, i.e., the non- activated liquid crystals 400, without the external light source 300 providing a "blinding" effect.
  • the processor 106 may also calculate a relative size of the external light source 300 at the LCD 1 12. That is, the processor 106 determines how large or small the external light source 300 appears at the LCD 112 from the position of the occupant 105. The processor 106 is then configured to send a command to the LCD 1 12 to activate at least one of the plurality of liquid crystals 400 to form a shape having a size approximately equal to calculated relative size of the external light source 200.
  • the shape formed by the liquid crystals 400 may be a circle. However, other shapes, e.g., an oval, may be produced by the liquid crystals 400 to compensate for the angle of the window 103 and/or the LCD 112.
  • the sun i.e., the external light source 200
  • the sun appears larger than other times of the day when it is "higher” in the sky.
  • more liquid crystals 400 may be activated to effectively dim the sun.
  • the headlight of an oncoming vehicle will appear to vary in size based on the distance the oncoming vehicle is away from the vehicle 102 housing the system 100 the occupant.
  • additional liquid crystals 400 may be activated.
  • the system 100 may operate in a recursive, repetitive, or otherwise iterative manner to continuously evaluate and reevaluate which, if any, of the liquid crystals 400 of the LCD 112 should be activated. That is, the processor 106 may command different liquid crystals 400 to be activated and/or deactivated based on various changes. These changes include, but are not limited to, a changing position of the external light source 300 relative to the vehicle 102, a change in direction and/or position of the vehicle 102, a change in position of the eyes of the occupant 105 (e.g., due to movement of the head), movement of the external light source 300, and rotation of the Earth.
  • the liquid crystals 400 of the LCD 112 may be selectively dimmed.
  • the amount of dimming provided by the liquid crystals 400 may be controlled by controlling the electrical charge provided to each liquid ciystal 400.
  • the LCD 112 may be utilized to not completely block out the external light source 300. This permits relief from the "blinding" effect of the external light source 300 while still allowing the occupant 105 to view the external light source 300.
  • the various liquid crystals 400 may be completely activate or deactivated in an alternating pattern as shown in Figure 9. As such, the amount of dimming may be controlled without having to control the electrical charge to individual liquid crystals 400.
  • the at least one processor 106 may also be configured to determine whether or not to request dimming based on an intensity of the external light source 300 and an intensity of ambient light. In one example, the processor 106 may be configured to determine the intensity of the external light source 300 and the intensity of ambient light based on the data provided by the second sensor 308. The processor 106 may also be configured to determine the difference between the intensities. In one embodiment, if the difference between intensities is less than a predetermined threshold, the processor 106 will not command liquid crystals 400 to be activated. This condition could occur when, for example, headlights of an oncoming vehicle are on during the daytime, and dimming is not required and may be distracting.
  • the at least one processor 106 may further be configured to determine whether or not to request activation of liquid crystals 400 based on the calculated size of the external light source 300. In one example, if the calculated size of the light source 300 is equal to or greater than a predetermined percentage of the area of the window 103, the liquid crystals 400 are only partially activated, i.e., dimmed, in order to maintain visibility. In another example, if the calculated size of the light source 300 is equal to or greater than a predetermined percentage of the area of the window 103, then only a portion of the liquid crystals 400 may be dimmed. These examples may occur and be desirable when a snow environment and/or wet pavement provides a large area reflecting the external light source 300.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)

Abstract

SYSTÈME ET PROCÉDÉ D'ATTÉNUATION DE LA LUMIÈRE POUR VÉHICULE. Un système d'atténuation de la lumière pour un véhicule comprend un capteur destiné à détecter un champ de vision et un affichage à cristaux liquides (LCD) comportant une pluralité de cristaux liquides. Un processeur en communication avec le capteur et le LCD reçoit une position d'un œil de l'occupant et détermine une position d'une source (300) de lumière extérieure dans le champ de vision. Le processeur est également configuré pour calculer un emplacement d'intersection (500) du LCD et d'une ligne entre l'œil de l'occupant et la source de lumière extérieure. Le processeur est en outre configuré pour commander sélectivement le LCD en vue d'activer au moins un cristal parmi la pluralité de cristaux liquides (400) au niveau ou à proximité de l'emplacement d'intersection calculé.
PCT/US2018/013799 2017-01-13 2018-01-16 Système et procédé d'atténuation de la lumière extérieure Ceased WO2018132811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201714405686A 2017-01-13 2017-01-13
US14/405,686 2017-01-13

Publications (1)

Publication Number Publication Date
WO2018132811A1 true WO2018132811A1 (fr) 2018-07-19

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Application Number Title Priority Date Filing Date
PCT/US2018/013799 Ceased WO2018132811A1 (fr) 2017-01-13 2018-01-16 Système et procédé d'atténuation de la lumière extérieure

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4684988A1 (fr) * 2024-07-26 2026-01-28 FERRARI S.p.A. Procédé de protection oculaire contre les rayons du soleil dans un véhicule routier et véhicule routier associé
CN121604231A (zh) * 2026-01-30 2026-03-03 重庆大学 基于外界可视条件的高寒隧道防雪棚照明调控方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090027759A1 (en) * 2007-07-23 2009-01-29 University Of Kuwait Electronic Window Shading System for Houses, Transport Vehicles and the Like
US20140320946A1 (en) * 2013-04-25 2014-10-30 International Business Machines Corporation Dynamically Managing Vehicle Glass Dimming

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090027759A1 (en) * 2007-07-23 2009-01-29 University Of Kuwait Electronic Window Shading System for Houses, Transport Vehicles and the Like
US20140320946A1 (en) * 2013-04-25 2014-10-30 International Business Machines Corporation Dynamically Managing Vehicle Glass Dimming

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4684988A1 (fr) * 2024-07-26 2026-01-28 FERRARI S.p.A. Procédé de protection oculaire contre les rayons du soleil dans un véhicule routier et véhicule routier associé
CN121604231A (zh) * 2026-01-30 2026-03-03 重庆大学 基于外界可视条件的高寒隧道防雪棚照明调控方法

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