US20140002259A1 - Automotive brake light with graduated display - Google Patents
Automotive brake light with graduated display Download PDFInfo
- Publication number
- US20140002259A1 US20140002259A1 US14/017,756 US201314017756A US2014002259A1 US 20140002259 A1 US20140002259 A1 US 20140002259A1 US 201314017756 A US201314017756 A US 201314017756A US 2014002259 A1 US2014002259 A1 US 2014002259A1
- Authority
- US
- United States
- Prior art keywords
- light
- vehicle
- segments
- assembly
- accelerometer
- 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.)
- Abandoned
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Classifications
-
- 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
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
- B60Q1/444—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal with indication of the braking strength or speed changes, e.g. by changing shape or intensity of the indication
-
- 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
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
- B60Q1/448—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal specially adapted for vehicles with ABS
Definitions
- the term “stored” embraces both or all of (1) hard-wiring with, for example, solid state relay-type devices or switches, (2) software programming, and (3) integrated circuitry available from a variety of manufacturers. Further, while interface 14 , controller 16 and interface 18 are shown as separate elements, they may be combined in one integrated circuit. Most vehicle deceleration ranges are from zero to about 2 g and various accelerometers can accommodate this range.
Abstract
An automotive brake light system producing a graduated display according to the level of vehicle deceleration as sensed by an onboard piezoelectric accelerometer. Taillight assemblies are divided into segments which are illuminated in sequence to produce a graduated display. The vehicle anti-lock brake system may be connected into the system to provide a special lighting effect such as blinking the taillights during a panic stop condition.
Description
- This application is a continuation of the co-pending U.S. patent application Ser. No. 12/813,865 filed Jun. 11, 2010. The entire contents of application Ser. No. 12/813,865 are incorporated herein by reference.
- This invention relates to rear-mounted automotive brake light systems and more particularly to a system in which the brake light or lights are illuminated in a graduated fashion to represent and convey information to other drivers regarding different degrees of deceleration of the vehicle.
- Conventional automotive braking systems are essentially binary in nature; i.e., the lights are illuminated when the brakes are applied and are not illuminated when the brakes are not applied.
- U.S. Patent Publication No. 2010/0085180 describes a brake light system using a potentiometer to sense pedal travel or brake application pressure and to produce a signal illuminating a brake light assembly in a graduated fashion thereby to convey information to a following vehicle driver regarding the driver-initiated braking action of the lead vehicle. This system suffers a number of disadvantages, including variability of actual deceleration display from vehicle to vehicle in the field, and the fact that brake application level, whether represented by pedal displacement or brake line pressure, is not a reliable indicator of actual vehicle deceleration. Greater brake pressure and/or pedal displacement may be needed to produce a given degree or deceleration as the brakes wear or, if fluid is depleted, or as vehicle load increases, or as a consequence of any combination of these factors. Furthermore, the quality of the road surface, tire composition and condition, all affect deceleration and even hard brake application may produce a relatively low deceleration rate on gravel, or wet and/or snow or ice-covered surfaces. If a vehicle is equipped with a regenerative brake energy capture system or a Jake/Exhaust/Retarder system, this may affect the relationship between brake pressure and actual deceleration.
- The present invention provides an automotive brake light system capable of conveying information to following vehicle drivers which is an accurate indication of vehicle deceleration on all road surfaces and which is repeatable over the useful life of the tires and brake system of a given vehicle. This is accomplished through the use of a vehicle mounted accelerometer which produces an output representing different degrees of vehicle deceleration. This output is connected through an interface, which may be hard-wired or implemented with programmable microcircuits, to illuminate segments of one or more rear-mounted brake light assemblies in a progressive or graduated fashion to represent different degrees of actual vehicle deceleration.
- In a preferred form, the brake light assemblies include plastic or glass lenses inside of which are mounted a plurality of LEDs. This implementation has the advantage of substantially instant illumination as opposed to conventional incandescent filament lights, which exhibit a significant delay between the application of current and the production of visible illumination. However, filament and gas discharge or halogen lights can be used with the present invention.
- In the illustrative embodiments hereinafter described in detail, the brake light assemblies and the lenses therein can assume any of several geometric shapes. In any of these shapes, it may be desirable to provide a perimeter segment which is lighted in the fashion of a conventional taillight as well as a plurality of contiguously arranged segments within the perimeter which are illuminated in a sequential fashion to show graduated degrees of deceleration. Not every light structure requires a separate lens for each “segment”; e.g., the light sources themselves may be spaced within a single lens to define “segments” which are illuminated progressively in a circle, semi-circle, or even a straight line.
- Also in a preferred embodiment of the invention, a vehicle anti-lock system is provided with a suitable signal generator which provides inputs to the interface to show a panic or hard braking condition by creating a special lighting effect; for example, one or both of the vehicle brake light assemblies may be actuated in such a way as to cause a blinking effect.
- The description herein makes reference to the accompanying drawings wherein like reference numerals refer to like parts throughout the several views and wherein:
-
FIG. 1 is a perspective view of an automobile equipped to carry out the invention; -
FIG. 2 illustrates a tail light representing a first embodiment of the invention; -
FIG. 3 illustrates second tail light representing a second embodiment; and -
FIG. 4 illustrates a system in block diagram and as applied to theFIG. 2 tail light. - Referring to
FIGS. 1 and 4 , there is shown avehicle 6 equipped with rear-mounted, spaced-apart lights 7, 8. Thevehicle 6 carries anaccelerometer 10 mounted in the vehicle in such a fashion that the sensitive axis of theaccelerometer 12 corresponds to the longitudinal axis of the vehicle. The accelerometer is preferably a piezoelectric single axis accelerometer having a range of about 0.02 g to about 2.0 g and producing a proportional output signal which is connected to aninterface 14 which converts the output signal by digitization and/or power level switching as necessary to provide a compatible input to acontroller 16 such as a microprocessor or microchip in which a lighting program is stored. Suitable accelerometers are available from Freescale Semiconductor, Inc. The term “stored” embraces both or all of (1) hard-wiring with, for example, solid state relay-type devices or switches, (2) software programming, and (3) integrated circuitry available from a variety of manufacturers. Further, whileinterface 14,controller 16 andinterface 18 are shown as separate elements, they may be combined in one integrated circuit. Most vehicle deceleration ranges are from zero to about 2 g and various accelerometers can accommodate this range. - The lighting program interface/
controller 16 is connected to aswitch unit 18 having multiple outputs connected to respective lighting segments oftail lights 7, 8 to illuminate the light sources in those segments at different deceleration levels. The light sources are preferably solid state devices such as LEDs but can also be incandescent lights, halogen lights, metal-halide lights or other available devices. Power for illumination of the LEDs comes from aDC source 20 which may be the vehicle battery and associated DC electrical system. In addition,switching unit 18 is connected to receive an input from theantilock brake system 19 to provide a panic-stop illumination signal as hereinafter explained. -
Brake lights 7, 8 comprise an outer plastic lens which is divided into a number of segments including aperipheral segment 30 and multiple side-by-side contiguousinternal segments LEDs 39 are disposed within these segments to create illumination within the segments which is transmitted through the lens to the rear of the vehicle to inform following drivers to the degree of deceleration experienced by thevehicle 6 as indicated by the output signal from theaccelerometer 10. - One exemplary program is to illuminate the
peripheral segment 30 under normal driving conditions with a steady state of illumination in the manner of a conventional taillight. A first level of deceleration, for example, caused simply by letting up on the gas pedal of the vehicle, produces a signal frominterface 18 which illuminatessegment 32. Harder braking and a greater degree of deceleration illuminatessegment 34 in addition tosegment 32. Additional degrees of deceleration progressively illuminatesegments - A variation on this program is to use LEDs of greater power output in the
larger segments - Finally, the activation of the vehicle
anti-lock system 19 causes a dedicated signal to be applied to theinterface 18 to thereafter operate all of thesegments peripheral segment 30. -
FIG. 3 shows an alternative geometric shape for abrake light assembly 42. In this case, shaped to include a large circular taillight/brake light 44 and a smaller adjacent back-uplight 46 in the same assembly. An integral lens system with red and white areas may be used. - The
brake light 44 comprises an outerperipheral segment 48 which is relatively thin and which is equipped with a series of LEDs shining through a diffusing lens to produce a nearly circular band of light. Within that band is a second somewhatwider band 50 which is divided into graduated segments which are progressively illuminated in a clockwise fashion as the output from theaccelerometer 10 indicates greater and greater degrees of vehicle deceleration. With the highest degree of vehicle deceleration, theentire band 50 is illuminated. - Within
band 50 is an essentially circular center area 52 which is illuminated upon realization of the lowest level of vehicle deceleration. This area 52 can alternatively serve as a running light. - The assemblies of
FIGS. 2 and 3 are typically used in pairs. Alternatively, the graduated illumination system may be used with a single center-high-mounted-stop-light of any geometric configuration; e.g., a straight line, while thetail lights 7, 8 are operated in conventional fashion. As an added feature, all segments of bothlights 7, 8 are turned full “on” in a steady state condition when the vehicle reaches full stop. The return of the accelerometer signal to zero together with a zero speedometer signal triggers this function through thecontroller 16. - It will be understood that the invention has been described with respect to illustrative embodiments and that many variations including different geometric shapes for the brake light assembly may be used. For definition of the invention, refer to the appended claims.
Claims (21)
1. An automotive brake light system comprising:
an accelerometer mounted in a vehicle to produce an output representing different degrees of vehicle slowing;
a rear light assembly having a display comprising a plurality of light sources; said light sources being arranged as a first portion comprising multiple segments and a second unsegmented portion contiguous to the first portion; and
an interface connected between the accelerometer and the light assembly responsive to the accelerometer output to illuminate only the segments of the first portion in a progressively increasing number to display different degrees of vehicle slowing; said second unsegmented portion being connected for illumination as a non-progressive light.
2. (canceled)
3. The assembly defined in claim 1 wherein the rear light assembly includes at least one lens arranged to transmit light from the light sources to the rear of the vehicle.
4. A system as defined in claim 1 wherein the rear light assembly comprises a geometric shape and the first portion segments are arranged in a contiguous fashion within the shape.
5. An assembly as defined in claim 4 wherein the sources are arranged in side-by-side fashion.
6. An assembly as defined in claim 4 wherein the first portion segments are graduated in size.
7. An assembly as defined in claim 4 wherein the second portion is arranged as a perimeter segment extending around the perimeter of the first portion.
8. A system as defined in claim 4 wherein the first portion segments are illuminated with individually graduated intensity in proportion to accelerometer output.
9. A system as defined in claim 4 wherein the shape is substantially circular.
10. A system as defined in claim 9 wherein the second portion is arranged as a center segment within the circular shape and the first portion segments are arranged circumferentially around the center segment.
11. A system as defined in claim 1 wherein the interface comprises a program containing an illumination sequence selectable according to the content of the accelerometer output.
12. A system as defined in claim 1 further comprising an anti-lock system actuation sensor connected to the interface to actuate the display in a fashion indicating operation of the anti-lock system.
13. A system as defined in claim 1 wherein the interface is programmed to provide a blinking illumination from the display under a predetermined condition.
14. A system as defined in claim 1 wherein the light sources are LEDs.
15. A system as defined in claim 1 further including means for illuminating all sources when the vehicle comes to a full stop.
16. A vehicle having a rear-mounted light illumination system comprising:
an accelerometer mounted in the vehicle to produce an output representing different degrees of vehicle slowing along a longitudinal axis of the vehicle;
at least one light assembly having a display comprising a plurality of contiguous segments; and
an interface connected between the accelerometer and the light assembly responsive to the output of the accelerometer to illuminate the segments progressively increasing number to represent different degrees of vehicle slowing; said light assembly further comprising a taillight arranged peripherally around said segments and connected for constant, non-progressive illumination.
17. A combination defined in claim 16 wherein the brake light assembly includes LEDs.
18. A vehicle brake light system comprising:
a brake light having an illumination area adapted to be progressively illuminated;
a sensor for producing an output related to vehicle deceleration; and
a controller connected between the sensor and the brake light to illuminate the brake light area in individually progressive intensities in response to said output.
19. A vehicle taillight/stop light assembly comprising:
a housing;
a first, subdivided stop light in said housing having individually illuminable light sources in the subdivisions thereof;
a second, unitary taillight in said housing adjacent said first stop light and having an illuminable light source therein; and
a controller for illuminating the light sources in the first portion in increasing number according to vehicle slowing.
20. A vehicle taillight/stop light assembly as defined in claim 19 wherein the second, unitary taillight is arranged peripherally around the first, subdivided stop light.
21. A vehicle taillight/stop light assembly as defined in claim 20 wherein the subdivisions of the stop light are of progressively larger sizes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/017,756 US20140002259A1 (en) | 2010-06-11 | 2013-09-04 | Automotive brake light with graduated display |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/813,865 US8547219B2 (en) | 2010-06-11 | 2010-06-11 | Automotive brake light with graduated display |
US14/017,756 US20140002259A1 (en) | 2010-06-11 | 2013-09-04 | Automotive brake light with graduated display |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/813,865 Continuation US8547219B2 (en) | 2010-06-11 | 2010-06-11 | Automotive brake light with graduated display |
Publications (1)
Publication Number | Publication Date |
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US20140002259A1 true US20140002259A1 (en) | 2014-01-02 |
Family
ID=45095791
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/813,865 Active 2032-01-28 US8547219B2 (en) | 2010-06-11 | 2010-06-11 | Automotive brake light with graduated display |
US14/017,756 Abandoned US20140002259A1 (en) | 2010-06-11 | 2013-09-04 | Automotive brake light with graduated display |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US12/813,865 Active 2032-01-28 US8547219B2 (en) | 2010-06-11 | 2010-06-11 | Automotive brake light with graduated display |
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US (2) | US8547219B2 (en) |
Cited By (2)
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CN108454506A (en) * | 2018-03-29 | 2018-08-28 | 贵州民族大学 | A kind of control method of brake speed warning light |
US20190241120A1 (en) * | 2019-04-22 | 2019-08-08 | Ford Locey | Brake light systems for vehicles |
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US8947223B2 (en) * | 2012-01-27 | 2015-02-03 | Rom Acquisition Corporation | Warning and scene lighting system |
US8917171B2 (en) * | 2012-09-07 | 2014-12-23 | J. Thomas Anderson | Vehicle warning light system and method |
US8992057B2 (en) * | 2013-03-12 | 2015-03-31 | GM Global Technology Operations LLC | Expressive vehicle lighting assembly |
CN103287328A (en) * | 2013-06-01 | 2013-09-11 | 李国强 | Braking level warning lamp |
DE102014210213A1 (en) | 2013-06-20 | 2014-12-24 | Volkswagen Aktiengesellschaft | Method and device for controlling a light emission of a taillight of a vehicle |
US9340246B2 (en) | 2014-05-01 | 2016-05-17 | John Desmond Woram | Bicycle brake light with graduated deceleration dependent lighting |
US9855889B1 (en) * | 2014-07-17 | 2018-01-02 | B&M, L.L.C. | Brake light system for vehicles |
US20160250966A1 (en) * | 2015-02-23 | 2016-09-01 | Brad Giguere | Pressure Sensitive Brake Light System |
US10543879B2 (en) * | 2015-03-17 | 2020-01-28 | Honda Motor Co., Ltd. | Small-vehicle direction indicator device |
KR20170082670A (en) * | 2016-01-06 | 2017-07-17 | 엘지전자 주식회사 | Lamp for vehicle and Vehicle including the same |
WO2017151686A1 (en) | 2016-02-29 | 2017-09-08 | Safely Brake, Inc. | Safety brake light module and method of engaging a safety brake light |
GB201706585D0 (en) * | 2017-04-25 | 2017-06-07 | Walford Richard | A bicycle brake light system |
US10081297B1 (en) * | 2017-05-10 | 2018-09-25 | Calsonic Kansei North America, Inc. | Variable brake light system |
DE102017208837A1 (en) * | 2017-05-24 | 2018-11-29 | Volkswagen Aktiengesellschaft | Customizable lighting system for a vehicle |
ES2695773B2 (en) * | 2017-07-07 | 2020-05-27 | Herrero Alvarez Maria Jose | Dynamic and proportional braking maneuver signaling system |
US20190071002A1 (en) * | 2017-09-05 | 2019-03-07 | Cary Scott | Dynamic brake light system |
DE102019205641B4 (en) * | 2019-04-17 | 2022-09-29 | Audi Ag | Lighting device for a motor vehicle for generating a light animation |
EP3981675A4 (en) * | 2019-06-04 | 2022-08-03 | Koito Manufacturing Co., Ltd. | Lamp for two-wheeled vehicle |
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US20190241120A1 (en) * | 2019-04-22 | 2019-08-08 | Ford Locey | Brake light systems for vehicles |
Also Published As
Publication number | Publication date |
---|---|
US20110304455A1 (en) | 2011-12-15 |
US8547219B2 (en) | 2013-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |