US20120194678A1 - Power-driven vehicle having at least one camera and a least one lamp - Google Patents

Power-driven vehicle having at least one camera and a least one lamp Download PDF

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Publication number
US20120194678A1
US20120194678A1 US13/359,328 US201213359328A US2012194678A1 US 20120194678 A1 US20120194678 A1 US 20120194678A1 US 201213359328 A US201213359328 A US 201213359328A US 2012194678 A1 US2012194678 A1 US 2012194678A1
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United States
Prior art keywords
power
lamp
power supply
driven vehicle
supply medium
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Abandoned
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US13/359,328
Inventor
Helmut Jakobsmeyer
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Assigned to HELLA KGAA reassignment HELLA KGAA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JAKOBSMEYER, HELMUT
Publication of US20120194678A1 publication Critical patent/US20120194678A1/en
Priority to US14/967,995 priority Critical patent/US9873369B2/en
Abandoned legal-status Critical Current

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    • 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
    • B60Q1/0408—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 built into the vehicle body, e.g. details concerning the mounting of the headlamps on the vehicle body
    • B60Q1/0475—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 built into the vehicle body, e.g. details concerning the mounting of the headlamps on the vehicle body with provisions for pre-mounting, for temporary holding the headlamp before or during final mounting
    • 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
    • B60Q1/22—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 for reverse drive
    • 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
    • B60Q1/0408—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 built into the vehicle body, e.g. details concerning the mounting of the headlamps on the vehicle body
    • B60Q1/0433—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 built into the vehicle body, e.g. details concerning the mounting of the headlamps on the vehicle body the housing being fastened onto the vehicle body using screws

Definitions

  • the invention relates to a power-driven vehicle having at least one camera and at least one lamp, wherein the camera is provided to photograph at least part of the surrounding area of the power-driven vehicle, the lamp is used to illuminate at least sections of said part of the surrounding area of the power-driven vehicle and, the lamp can be supplied by a power supply medium of the power-driven vehicle with power having a first frequency to generate the light.
  • the invention relates to a power supply medium for one or a plurality of lamps of a power-driven vehicle.
  • Lamps of a lighting system of a power-driven vehicle are increasingly being fitted with light-emitting diodes serving as lights. Especially for tail lamps, the use of light-emitting diodes serving as lights is very common.
  • Lamps of a power-driven vehicle equipped with light-emitting diodes are generally supplied with a constant voltage.
  • the pulse width of the power supplied to the light-emitting diodes is modulated to adjust different lamp brightness intensities. The performance and hence the brightness of the lamps can be adjusted by setting a pulse-duty factor of the pulse width modulated power.
  • the impulse frequency of the pulse width modulated power is usually 100 Hz.
  • the backup cameras are electronic cameras which generate digital images.
  • the pictures are digitally processed in an image processing unit.
  • Disruptive manifestations on the image are removed in the process. Said manifestations include for instance the flickering of the images which occurs when the part of the surrounding area of the power-driven vehicle photographed by the camera is illuminated by means of a fluorescent lamp connected to the commonly used 50 Hz or 60 Hz frequencies of electric power grids.
  • the flickering of images displayed to the driver can be prevented by compensating the flickering with 50 Hz or 60 Hz frequency filters of the image processing unit. Because of the varying supply frequencies, the image processing unit is set up in such a way that it either filters the 60 Hz frequency flicker or the 50 Hz frequency flicker. A corresponding switch of the image processing unit is therefore provided.
  • Flickering of the images photographed by the backup camera can also occur if the parts of the surrounding area of the power-driven vehicle photographed with the camera are illuminated by means of a lamp equipped with light-emitting diodes and the brightness of the lamp is adjusted by means of a pulse width modulating power.
  • the frequency of impulses of the pulse width modulated power transmitting the electrical energy appears as a flicker on the image photographed by the backup camera.
  • the filter of the image processing unit is syntonized to a supply frequency of 50 Hz, the flicker of the pulse width modulated power (100 Hz) is equally compensated, because said filter is capable of filtering the 50 Hz frequency as well as integral multiples of said frequency.
  • the filter of the image processing unit is syntonized to the supply frequency of 60 Hz, the filter is unable to compensate the flicker caused by the pulse width modulated power.
  • the benefit of the described invention is to upgrade a power-driven vehicle and a power supply medium in such a way that a flickering of the image photographed by the camera caused by supply frequencies of 50 Hz or 60 Hz or by the pulse width modulation of the supply power of the lamp can be compensated effectively.
  • this object is solved with a power-driven vehicle having the properties of claim 1 and with a power supply medium having the properties of claim 7 .
  • the power supply medium of a power-driven vehicle can supply the lamp of the power-driven vehicle with power in which the first frequency has a value of 300 Hz.
  • the number 300 is the smallest common integral multiple of the numbers 50 and 60. Consequently, filters syntonized to 50 Hz or 60 Hz frequencies can compensate flickering caused by power with a frequency of 300 Hz. In other words, if the impulse frequency of the pulse width modulated current to supply the lamp is 300 Hz, the flickering it induces is effectively compensated with the filters syntonized to 50 or 60 Hz of the image processing unit.
  • the lamp can be supplied by the power supply medium with power having a second frequency with a value of for instance 100 Hz. It is particularly advantageous if the lamp is supplied with power having the first frequency (300 Hz) in connection with the engaged reverse gear and turned on backup camera and with power having the second frequency (e.g. 100 Hz) in connection with the engaged forward gear and turned off backup camera. Aside from 100 Hz, the value of the second frequency can also be 90 Hz, 125 Hz or similar.
  • the lamp can be a lamp equipped with one or a plurality of light-emitting diodes provided as lights.
  • the lamp can be a tail lamp, in particular a reversing lamp, a flashing rear lamp, a rear parking lamp, a brake lamp, a rear fog lamp and/or a license plate lamp.
  • the camera can be a backup camera.
  • Power supply media according to the invention for one or a plurality of lamps of a power-driven vehicle according to the invention comprise a control system used to set a frequency of power to be supplied by the power supply medium.
  • a power supply medium according to the invention can comprise a d. c. converter.
  • the power supply medium can comprise pulse width modulation elements used for pulse width modulation of the power to be supplied by the power supply medium, for instance to adjust the brightness of the lamp.
  • the impulse frequency of the pulse width modulated power to be supplied by the power supply medium can be adjusted with the control system of the power supply medium.
  • the power supply medium can comprise an input to which a signal can be connected which can be processed as a signal by the control system, which displays the status of an engaged reverse or forward gear.
  • FIG. 1 shows an arrangement of a power-driven vehicle according to the invention, consisting of a power supply medium according to the invention, a backup camera and a license plate lamp.
  • the arrangement of a power-driven vehicle according to the invention illustrated in FIG. 1 comprises a power supply medium according to the invention, a backup camera and a license plate lamp.
  • the backup camera and the license plate lamp are arranged at the tail end of the power-driven vehicle.
  • the purpose of the backup camera is to at least partially photograph the surrounding area behind the vehicle when the power-driven vehicle is reversed.
  • the photographed image is fed to an image processing unit (not illustrated) and displayed on a monitor at the driver's seat. This allows the driver to monitor the area behind the power-driven vehicle when reversing the vehicle.
  • the image processing unit is provided with a filter syntonized to 50 Hz or 60 Hz and multiples of 50 Hz or 60 Hz.
  • the filter is syntonized to 50 Hz or 60 Hz according to the supply frequency of the public power supply in the surrounding area of the power-driven vehicle.
  • the license plate lamp L also illuminates part of a section of the surrounding area of the power-driven vehicle photographed by the camera.
  • the license plate lamp is a lamp having at least one light-emitting diode serving as a light.
  • the light-emitting diode is supplied with pulse width modulated power I M supplied by the power supply medium.
  • the brightness of the light-emitting diode can be adjusted with the pulse-duty factor of the modulation.
  • the impulse frequency of the power is 100 Hz with engaged forward gear and 300 Hz with engaged reverse gear.
  • the power supply medium SM has an input where a signal containing the information about the respective engaged gear can be scanned in.
  • Said input shall be one that only allows scanning of this information.
  • this can be a CAN bus interface on which the information about the respective engaged gear is available.
  • the power supply medium draws the electrical energy required to supply the license plate lamp from the supply system of the power-driven vehicle by way of a CI30 adapter and a connection to ground.

Abstract

A power-driven vehicle having at least one camera and at least one lamp, the camera is provided to photograph at least part of the surrounding area of the power-driven vehicle, the lamp is used to illuminate at least sections of said part of the surrounding area of the power-driven vehicle, and the lamp can be supplied by a power supply medium of the power-driven vehicle with power having a first frequency to generate the light.

Description

    RELATED APPLICATIONS
  • This application claims priority and benefit of German Patent Application No. 102011000360.6, filed Jan. 27, 2011.
    • BACKGROUND OF THE INVENTION
  • The invention relates to a power-driven vehicle having at least one camera and at least one lamp, wherein the camera is provided to photograph at least part of the surrounding area of the power-driven vehicle, the lamp is used to illuminate at least sections of said part of the surrounding area of the power-driven vehicle and, the lamp can be supplied by a power supply medium of the power-driven vehicle with power having a first frequency to generate the light.
  • Furthermore, the invention relates to a power supply medium for one or a plurality of lamps of a power-driven vehicle.
    • RELATED ART
  • Lamps of a lighting system of a power-driven vehicle are increasingly being fitted with light-emitting diodes serving as lights. Especially for tail lamps, the use of light-emitting diodes serving as lights is very common. Lamps of a power-driven vehicle equipped with light-emitting diodes are generally supplied with a constant voltage. The pulse width of the power supplied to the light-emitting diodes is modulated to adjust different lamp brightness intensities. The performance and hence the brightness of the lamps can be adjusted by setting a pulse-duty factor of the pulse width modulated power. The impulse frequency of the pulse width modulated power is usually 100 Hz.
  • Many modern power-driven vehicles are equipped with a backup camera serving as an assistance system for the driver. The backup cameras are electronic cameras which generate digital images. The pictures are digitally processed in an image processing unit. Disruptive manifestations on the image are removed in the process. Said manifestations include for instance the flickering of the images which occurs when the part of the surrounding area of the power-driven vehicle photographed by the camera is illuminated by means of a fluorescent lamp connected to the commonly used 50 Hz or 60 Hz frequencies of electric power grids. The flickering of images displayed to the driver can be prevented by compensating the flickering with 50 Hz or 60 Hz frequency filters of the image processing unit. Because of the varying supply frequencies, the image processing unit is set up in such a way that it either filters the 60 Hz frequency flicker or the 50 Hz frequency flicker. A corresponding switch of the image processing unit is therefore provided.
  • Flickering of the images photographed by the backup camera can also occur if the parts of the surrounding area of the power-driven vehicle photographed with the camera are illuminated by means of a lamp equipped with light-emitting diodes and the brightness of the lamp is adjusted by means of a pulse width modulating power. The frequency of impulses of the pulse width modulated power transmitting the electrical energy appears as a flicker on the image photographed by the backup camera.
  • If the filter of the image processing unit is syntonized to a supply frequency of 50 Hz, the flicker of the pulse width modulated power (100 Hz) is equally compensated, because said filter is capable of filtering the 50 Hz frequency as well as integral multiples of said frequency. In contrast, if the filter of the image processing unit is syntonized to the supply frequency of 60 Hz, the filter is unable to compensate the flicker caused by the pulse width modulated power.
    • SUMMARY OF THE INVENTION
  • The benefit of the described invention is to upgrade a power-driven vehicle and a power supply medium in such a way that a flickering of the image photographed by the camera caused by supply frequencies of 50 Hz or 60 Hz or by the pulse width modulation of the supply power of the lamp can be compensated effectively.
  • According to the invention, this object is solved with a power-driven vehicle having the properties of claim 1 and with a power supply medium having the properties of claim 7.
  • The power supply medium of a power-driven vehicle according to the invention can supply the lamp of the power-driven vehicle with power in which the first frequency has a value of 300 Hz. The number 300 is the smallest common integral multiple of the numbers 50 and 60. Consequently, filters syntonized to 50 Hz or 60 Hz frequencies can compensate flickering caused by power with a frequency of 300 Hz. In other words, if the impulse frequency of the pulse width modulated current to supply the lamp is 300 Hz, the flickering it induces is effectively compensated with the filters syntonized to 50 or 60 Hz of the image processing unit.
  • Furthermore, to generate light, the lamp can be supplied by the power supply medium with power having a second frequency with a value of for instance 100 Hz. It is particularly advantageous if the lamp is supplied with power having the first frequency (300 Hz) in connection with the engaged reverse gear and turned on backup camera and with power having the second frequency (e.g. 100 Hz) in connection with the engaged forward gear and turned off backup camera. Aside from 100 Hz, the value of the second frequency can also be 90 Hz, 125 Hz or similar.
  • The lamp can be a lamp equipped with one or a plurality of light-emitting diodes provided as lights. The lamp can be a tail lamp, in particular a reversing lamp, a flashing rear lamp, a rear parking lamp, a brake lamp, a rear fog lamp and/or a license plate lamp. The camera can be a backup camera.
  • Power supply media according to the invention for one or a plurality of lamps of a power-driven vehicle according to the invention comprise a control system used to set a frequency of power to be supplied by the power supply medium.
  • A power supply medium according to the invention can comprise a d. c. converter.
  • The power supply medium can comprise pulse width modulation elements used for pulse width modulation of the power to be supplied by the power supply medium, for instance to adjust the brightness of the lamp. The impulse frequency of the pulse width modulated power to be supplied by the power supply medium can be adjusted with the control system of the power supply medium.
  • The power supply medium can comprise an input to which a signal can be connected which can be processed as a signal by the control system, which displays the status of an engaged reverse or forward gear.
  • Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is explained in detail based on the attached drawings. In the figures:
  • FIG. 1 shows an arrangement of a power-driven vehicle according to the invention, consisting of a power supply medium according to the invention, a backup camera and a license plate lamp.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • The arrangement of a power-driven vehicle according to the invention illustrated in FIG. 1 comprises a power supply medium according to the invention, a backup camera and a license plate lamp. The backup camera and the license plate lamp are arranged at the tail end of the power-driven vehicle. The purpose of the backup camera is to at least partially photograph the surrounding area behind the vehicle when the power-driven vehicle is reversed. The photographed image is fed to an image processing unit (not illustrated) and displayed on a monitor at the driver's seat. This allows the driver to monitor the area behind the power-driven vehicle when reversing the vehicle.
  • To prevent a flickering of the image displayed on the monitor, the image processing unit is provided with a filter syntonized to 50 Hz or 60 Hz and multiples of 50 Hz or 60 Hz. The filter is syntonized to 50 Hz or 60 Hz according to the supply frequency of the public power supply in the surrounding area of the power-driven vehicle.
  • The license plate lamp L also illuminates part of a section of the surrounding area of the power-driven vehicle photographed by the camera. The license plate lamp is a lamp having at least one light-emitting diode serving as a light. To adjust the brightness of the light-emitting diode, the light-emitting diode is supplied with pulse width modulated power IM supplied by the power supply medium. The brightness of the light-emitting diode can be adjusted with the pulse-duty factor of the modulation. In the process, the impulse frequency of the power is 100 Hz with engaged forward gear and 300 Hz with engaged reverse gear. In order to be able to recognize the engaged forward gear or the engaged reverse gear, the power supply medium SM has an input where a signal containing the information about the respective engaged gear can be scanned in. Said input shall be one that only allows scanning of this information. Alternatively, this can be a CAN bus interface on which the information about the respective engaged gear is available.
  • The power supply medium draws the electrical energy required to supply the license plate lamp from the supply system of the power-driven vehicle by way of a CI30 adapter and a connection to ground.
  • As various modifications could be made to the exemplary embodiments, as described above with reference to the corresponding illustrations, without departing from the scope of the invention, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.

Claims (10)

1. Power-driven vehicle having at least one camera and at least one lamp,
a. wherein the camera is provided to photograph at least part of the surrounding area of the power-driven vehicle,
b. wherein the lamp is used to illuminate at least sections of said part of the surrounding area of the power-driven vehicle,
c. wherein the lamp can be supplied by a power supply medium of the power-driven vehicle with power (IM) having a first frequency to generate the light,
characterized in that
the first frequency has a value of 300 Hz.
2. Power-driven vehicle according to claim 1, characterized in that the lamp can alternatively be supplied by a power supply medium with power (IM) having a second frequency with a value of 100 Hz to generate the light.
3. Power-driven vehicle according to claim 2, characterized in that the lamp can be supplied with power (IM) having the first frequency if the reverse gear is engaged and with power (IM) having the second frequency if the forward gear is engaged.
4. Power-driven vehicle according to claim 1, characterized in that the lamp is a lamp equipped with one or a plurality of light-emitting diodes serving as lights.
5. Power-driven vehicle according to claim 1, characterized in that the lamp is a tail lamp, in particular a reversing lamp, a flashing rear lamp, a rear parking lamp, a brake lamp, a rear fog lamp and/or a license plate lamp.
6. Power-driven vehicle according to claim 1, characterized in that the camera is a backup camera.
7. Power supply medium for one or a plurality of lamps of a power-driven vehicle with the properties of claim 1, characterized in that a frequency of the power to be provided by the power supply medium can be adjusted by means of a control system of the power supply medium.
8. Power supply medium according to claim 7, characterized in that the power supply medium comprises a d. c. converter.
9. Power supply medium according to claim 7, characterized in that the power supply medium comprises elements for pulse width modulation used to modulate the pulse width of the power (IM) to be supplied by the power supply medium, and in that the impulse frequency of the pulse width modulated power (IM) to be provided by the power supply medium can be adjusted by means of a control system of the power supply medium.
10. Power supply medium according to claim 7, characterized in that the power supply medium has an input to which a signal can be connected which can be processed as a signal by the control system, which displays the status of an engaged reverse or forward gear.
US13/359,328 2011-01-27 2012-01-26 Power-driven vehicle having at least one camera and a least one lamp Abandoned US20120194678A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/967,995 US9873369B2 (en) 2011-01-27 2015-12-14 Illumination device for a vehicle, and method of attachment for the illumination device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011000360.6 2011-01-27
DE102011000360A DE102011000360A1 (en) 2011-01-27 2011-01-27 Lighting device for vehicles and fastening method for the lighting device

Related Child Applications (1)

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US14/967,995 Continuation US9873369B2 (en) 2011-01-27 2015-12-14 Illumination device for a vehicle, and method of attachment for the illumination device

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US14/967,995 Active 2032-06-13 US9873369B2 (en) 2011-01-27 2015-12-14 Illumination device for a vehicle, and method of attachment for the illumination device

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CN102616174A (en) 2012-08-01
US20160101721A1 (en) 2016-04-14
US9873369B2 (en) 2018-01-23
DE102011000360A1 (en) 2012-08-02

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