WO2004060716A1 - Autolights system for vehicle - Google Patents

Autolights system for vehicle Download PDF

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Publication number
WO2004060716A1
WO2004060716A1 PCT/KR2003/002889 KR0302889W WO2004060716A1 WO 2004060716 A1 WO2004060716 A1 WO 2004060716A1 KR 0302889 W KR0302889 W KR 0302889W WO 2004060716 A1 WO2004060716 A1 WO 2004060716A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
vehicle
section
detecting
headlights
Prior art date
Application number
PCT/KR2003/002889
Other languages
French (fr)
Inventor
Young-Bong Kim
Original Assignee
Young-Bong Kim
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
Priority claimed from KR10-2003-0000071A external-priority patent/KR100473653B1/en
Priority claimed from KR1020030082835A external-priority patent/KR20040063072A/en
Application filed by Young-Bong Kim filed Critical Young-Bong Kim
Priority to AU2003289571A priority Critical patent/AU2003289571A1/en
Priority to JP2004564586A priority patent/JP2006512250A/en
Publication of WO2004060716A1 publication Critical patent/WO2004060716A1/en

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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
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • 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
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • 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
    • B60Q1/2603—Attenuation of the light according to ambient luminiosity, e.g. for braking or direction indicating lamps
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/052—Switching delay, i.e. the beam is not switched or changed instantaneously upon occurrence of a condition change
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/054—Variable non-standard intensity, i.e. emission of various beam intensities different from standard intensities, e.g. continuous or stepped transitions of intensity
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/11—Linear movements of the vehicle
    • B60Q2300/112—Vehicle speed
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/14—Other vehicle conditions
    • B60Q2300/146—Abnormalities, e.g. fail-safe
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/20—Indexing codes relating to the driver or the passengers
    • B60Q2300/21—Manual control
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/31—Atmospheric conditions
    • B60Q2300/314—Ambient light
    • 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
    • B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
    • B60Q2400/30—Daytime running lights [DRL], e.g. circuits or arrangements therefor

Definitions

  • the present invention relates to an autolights system for a vehicle, and more particularly to an autolights system for a vehicle capable of automatically controlling an on/off operation of lamps (headlights and tail lamps) and adjusting brightness of the lamps based on a movement of the vehicle and quantity of light.
  • tail lamps are installed at front and rear portions of a vehicle so as to allow other drivers to recognize the vehicle.
  • the tail lamps are manually turned on or off by a driver. Under a relatively dark circumstance, such as an early morning, an early evening, or a cloudy weather, or when entering into a tunnel, the driver must manually turn on the tail lamps while driving a vehicle, causing the driver to feel inconvenience.
  • headlights lightens a forward area of the vehicle so as to allow the driver to safely drive the vehicle.
  • the headlights must have sufficient brightness capable of showing an object, which is positioned about one hundred meters ahead.
  • light radiated from the headlights must be dispersed such that the driver may recognize a peripheral circumstance of the vehicle, without dazzling other drivers traveling along an opposite traffic lane.
  • FIG. I is a view showing a structure of a conventional lamp switching apparatus used for headlights or tail lamps.
  • a lamp switch 1 called a "combination lever switch” is installed adjacent to a handle so as to allow a driver to easily select a tail mode or a head mode for turning on/off tail lamps or the headlights.
  • a power supply section 4 supplies power for turning on various lamps.
  • a first relay 2 transfers power of the power supply section 4 to tail lamps 5 and 6 when the lamp switch 1 is positioned in the tail mode in order to turn on the tail lamps 5 and 6.
  • a second relay 3 transfers power of the power supply section 4 to left and right headlights 7 and 8 when the lamp switch 1 is positioned in the head mode so as to turn on the left and right headlights 7 and 8.
  • a dimmer switch 9 is manually operated by means of the driver so as to selectively operate headlights or passing lights.
  • a terminal (a) of the dimmer switch 9 When a terminal (a) of the dimmer switch 9 is connected to a common terminal (c), current is applied to filaments LI and L3 so that low beam is generated from the headlights. In addition, when a terminal (b) of the dimmer switch 9 is connected to the common terminal (c), current is applied to filaments L2 and L4, so that high beam is generated from the passing lights. In the night or in a foggy day or a cloudy day, or when passing through a tunnel, the driver must manually turn on/off headlights 7 and 8 and taillights 5 and 6 by handling the lamp switch 1, so it is very inconvenient for the driver.
  • an automatic switching module which is connected to the headlights 7 and 8 in order to automatically turn on/off the headlights 7 and 8, thereby automatically controlling and protecting the headlights 7 and 8.
  • a method for protecting the mechanical relays 2 and 3 has not been suggested. That is, although the automatic switching module may automatically turn of/off and protect the headlights 7 and 8 and taillights 5 and 6, such protecting function of the automatic switching module can be carried out by directly controlling the mechanical relays 2 and 3, so it is impossible to protect the mechanical relays 2 and 3.
  • the mechanical relays 2 and 3 mechanically controls the headlights 7 and 8 and taillights 5 and 6 through mechanical contacts thereof, the life span of the headlights 7 and 8 and taillights 5 and 6 may be shortened.
  • an additional device is necessary for automatically controlling the headlights 7 and 8 and taillights 5 and 6, causing additional cost.
  • the present invention has been made in view of the abovementioned problems, and it is a first object of the present invention to provide an autolights system for a vehicle, in which a light-quantity detecting sensor is installed at a lower boundary surface of a front window so as to precisely detect quantity of light incident into the front window, so that the autolights system can be stably operated.
  • a second object of the present invention is to provide an autolights system for a vehicle capable of adjusting brightness of a headlight in a daytime in such a manner that the brightness of the headlight in the daytime is less than 70% of the brightness of the headlight in the night, in which the brightness of the headlight is automatically adjusted under a PWM (pulse width modulation) control according to brightness around the vehicle, thereby reducing fuel consumption while satisfying a duty to turn on daytime running lights for preventing vehicle accidents.
  • PWM pulse width modulation
  • a third object of the present invention is to provide an autolights system for a vehicle capable of gradually increasing or decreasing brightness of headlights and taillights under a PWM control according to brightness around the vehicle, thereby preventing a thermal expansion phenomenon of a filament and lengthening a life span of headlights/taillights, and capable of controlling brightness of headlights according to a movement of the vehicle and brightness around the vehicle, thereby preventing the headlights from being unnecessarily turned on/off when the vehicle stops waiting for a traffic signal.
  • a fourth object of the present invention is to provide an autolights system for a vehicle capable of replacing conventional relays by using four ports, which are used for the conventional relays, without requiring additional devices or exchanging peripheral elements, and capable of achieving superior performance without requiring an additional ground line by allowing existing switches to have a grounding function.
  • a fifth object of the present invention is to provide an autolights system for a vehicle, which matches with various desires of a driver by enabling the driver to turn on/off headlights or taillights even if an engine stops by detecting an operational state of the engine.
  • an autolights system for a vehicle comprising: a light-quantity detecting sensor for generating a light-quantity detecting signal by detecting quantity of light or a vehicle movement detecting section for generating a movement state detecting signal based on a running state of the vehicle; at least two lamp power supply switches, which are switched-on so as to supply power to a lamp section; a first switch, which is switched-on when a lamp switch operated by a driver is switched-on so as to generate a lamp switch-on signal; at least two second switches, which are switched-on based on a lamp switching command signal for turning on the lamp section, the second switch transmitting the lamp switching command signal to the lamp power supply switch; a lamp switch detecting section for continuously generating switching signals so as to allow the lamp section to be maintained in a turn- on state by detecting on/off signals, which are generated after an initial on-state of the lamp switch; and a control
  • an ampere detecting section is further provided for generating a current detecting signal based on an amount of current used in the lamp in order to diagnose an error of the lamp section.
  • the ampere detecting section transmits the current detecting signal to the control section.
  • a buzzer switch which is switched on based on a buzzing sound generating signal when the lamp section is faulted, is further provided.
  • the buzzer switch transmits the buzzing sound generating signal to the vehicle movement detecting section.
  • the lamp switch detecting section is provided between a power supply section and a ground and includes a charging part allowing the lamp switch detecting section to be charged with power supplied from the power supply section and a discharging part for discharging the power from the lamp switch detecting section when the lamp switch is switched-off by the driver, thereby providing a predetermined driving time of the control section.
  • an autolights system for a vehicle used for automatically turning on/off headlights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section automatically turning on/off the headlights based on the intensity of illumination detected by the light-quantity detecting sensor, and adjusting brightness of the headlights within PWM 70%; a relay for turning on/off the headlights according to a PWM signal generated from the control section; and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity.
  • the control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlights is constantly maintained when the vehicle runs, brightness of the headlights is reduced or the headlights are turned off when the vehicle temporarily stops, and the headlights are turned off when the vehicle is in a parking state.
  • the autolights system acts as daytime running lights.
  • an autolights system for a vehicle used for automatically turning on/off headlights and taillights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section for differentially turning on/off the headlights and taillights based on the intensity of illumination detected by the light-quantity detecting sensor, and for outputting a PWM signal to adjust brightness of the headlights; first and second relays for automatically turning on/off the headlights and taillights according to the PWM signal generated from the control section, and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity
  • the control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlight
  • an autolights system for a vehicle used for manually turning on/off headlights and taillights of the vehicle, the autolights system comprising: a lamp switch detecting section for detecting an operational state of the lamp switch in order to manually turning on/off the headlights and the tail lights; a control section for outputting a PWM signal to turn on/off the headlights and taillights based on the operational state detected by the lamp switch detecting section; first and second relays for manually turning on/off the headlights and taillights according to the PWM signal generated from the control section; and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity.
  • the control section receives the vehicle velocity from the vehicle movement detecting section and outputs the PWM signal to the first and second relays in order to compulsorily turn on/off the headlights and tail lights for a predetermined time even if an operation of an engine stops
  • FIG. 1 is a view showing a structure of a conventional lamp switching apparatus
  • FIG. 2 is a view showing conventional light-quantity detecting sensors installed in a vehicle
  • FIG. 3 is a view showing a light-quantity detecting sensor and an automatic lamp controlling apparatus installed in a vehicle according to one embodiment of the present invention
  • FIG. 4 is a block view showing a structure of an autolights system for a vehicle according to one embodiment of the present invention.
  • FIG. 5 is a flowchart showing an operating procedure of an autolights system for a vehicle according to one embodiment of the present invention.
  • FIG. 3 is a view showing a light-quantity detecting sensor and an automatic lamp controlling apparatus installed in a vehicle according to one embodiment of the present invention.
  • a light-quantity detecting sensor 2011 is attached to a lower boundary surface of a front window of a vehicle for detecting quantity of light, which varies according to brightness around the vehicle.
  • An automatic lamp control circuit 20 is connected to the light-quantity detecting sensor 2011 through a wire 501 so as to turn on/off headlights and taillights.
  • the automatic lamp control circuit 20 is installed on a socket 50, which is used for a conventional relay, so that the automatic lamp control circuit 20 substitutes for the conventional relay without requiring additional devices or 20
  • the light-quantity detecting sensor 2011 includes cadmiumsulfide (CDS), which is an element capable of detecting intensity of illumination.
  • CDS cadmiumsulfide
  • the light-quantity detecting sensor 2011 does not locally detect the intensity of illumination, but detect the intensity of illumination based on quantity of light incident into the whole area of a front window of the vehicle and a mean value thereof, so that the light-quantity detecting sensor 2011 can stably operate even if dust or impurities exist in vicinity of the light-quantity detecting sensor 2011 or the vehicle is spattered with mud.
  • FIG. 4 is a block view showing a structure of the autolights system for the vehicle according to one embodiment of the present invention.
  • the autolights system of the present invention includes a lamp switch 10, an automatic lamp control circuit 20, a lamp section 30 and a power supply section 40.
  • the lamp switch 10 is a kind of a manual switch, which is manually operated by a driver so as to turn on/off the lamp section, 30 including headlights and taillights.
  • the lamp switch 10 is a combination lever switch, which is movable into a first manual mode for maintaining a manual switching function of the lamp section 30, an automatic mode for automatically turning on/off the taillights according to illumination around the vehicle, automatically turning on/off the headlights according to illumination around the vehicle and a movement of the vehicle, and adjusting brightness of the headlights in a multi-level, and a second manual mode for selectively turning on/off the lamp section 30 even if an engine stops.
  • the lamp section 30 signifies the headlights or taillights.
  • a high lamp and a low lamp are provided in each of left and right headlights.
  • four clearance lights are provided at both sides of front and rear portions of the vehicle.
  • the power supply section 40 signifies a battery for supplying power to the lamp section 30.
  • the automatic lamp control circuit 20 includes a light-quantity detecting section 201, a vehicle movement detecting section 202, a lamp power supply switch 203, an ampere detecting section 204, a first switch 205, a second switch 206, a buzzer switch 207, a lamp switch detecting section 208, and a control section 209.
  • the light-quantity detecting section 201 has the light-quantity detecting sensor 2011, which detects a resistance value varied depending on quantity of light incident into the vehicle so as t generate a light-quantity detecting signal and a resistor Rl .
  • the vehicle movement detecting section 202 includes a pickup sensor 2021 and a pulse shaper 2022.
  • the pickup sensor 2021 is wound around an ignition cable so as to detect the movement of the vehicle runs or stops. That is, the pickup sensor 2021 detects a vehicle velocity and output a velocity signal as a pulse, thereby generating a vehicle movement detecting signal.
  • the lamp power supply switch 203 is a kind of a relay for supplying power of the power supply section 40 to the lamp section 30.
  • the lamp power supply switch 203 includes a first digital smart relay 2031 for driving IGBT and a second digital smart relay 2032 for driving IGBT.
  • the first digital smart relay 2031 supplies battery voltage, which is provided from the power supply section 40 according to a PWM signal generated from the control section 209, to the taillights of the lamp section 30, thereby turning on/of the taillights.
  • the second digital smart relay 2032 supplies battery voltage, which is provided from the power supply section 40 according to the PWM signal generated from the control section 209, to the headlights of the lamp section 30, thereby turning on/of the headlights and variably adjusting brightness of the headlight.
  • ampere detecting section 204 detects ampere based on the resistance value of the lamp section 30, thereby generating a current detecting signal so as to diagnose an error of the lamp section 20.
  • the first switch 205 is switched-on when the lamp switch 10 is switched-on, thereby generating a lamp switch-on signal and the second switch 206 is switched-on when a lamp switching command signal is generated for turning on/off the lamp section 30 and transfers the lamp switching command signal to the lamp power supply switch 203.
  • the buzzer switch 207 is switched on when a buzzing sound command signal is transmitted thereto from the control section 209, thereby generating a buzzing sound notifying that the lamp section 30 has a fault.
  • the first switch 205, the second switch 206 and the buzzer switch 207 include a photo coupler and the lamp power supply switch 203 and the ampere detecting section 204 are integrally formed with a power transistor.
  • the lamp switch detecting section 208 continuously generates a switching signal by detecting on off signals, which are generated after the lamp switch 10 is initially switched-on, in such a manner that the lamp section 30 is continuously switched
  • the control section 209 detects an input of the lamp switch-on signal based on a signal inputted from the lamp switch detecting section 208, thereby determining a switching mode of the lamp section 30, that is the manual mode or the automatic mode If the switching signal is continuously generated, the automatic mode for the lamp section 30 is converted into the manual mode through a default manner.
  • control section 209 determines the daytime or nighttime based on a light-quantity detecting signal inputted from the light-quantity detecting section so as to differentially turn on/off the headlights and taillights of the lamp section 30. To this end, the control section controls the lamp power supply switch
  • control section 209 detects the movement of the vehicle based on the vehicle movement detecting signal inputted from the vehicle movement detecting section 202 so as to vary a pulse width modulation signal depending on the movement of the vehicle and intensity of illumination around the vehicle and stores a program (pattern) for variably controlling brightness of the lamp section 30.
  • control section outputs a buzzing sound generating signal based on a current detecting signal inputted thereto from the ampere detecting section
  • the control section 209 may control brightness of the lamp section 30 through a PWM control depending on intensity of illumination around the vehicle so as to use the headlights of the lamp section 30 as daytime running lights. In the night, the control section 209 may control brightness of the lamp section 30 such that the lamp section 30 has brightness of PWM 100%.
  • a learning function for an intelligent vehicle movement characteristic is added to the control section 209. That is, the control section 209 learns a dynamic characteristic of an engine R P.M, so that the control section 209 performs the control operation when the vehicle runs and ' stops the control operation when the vehicle stops. If the vehicle slightly moves due to a traffic jam, the control operation of the control section 209 is not carried out.
  • control section 209 gradually increases or decreases the brightness of the lamp section 30 when turning on/off the lamp section 30 so as to prevent a filament of the lamp section 30 from being oxidized.
  • PWM pulse width modulation
  • the automatic lamp control circuit 20 uses four ports T_SW, T_POWER, T_LAMP_IN, and T_LAMP_OUT, which are used for conventional relays.
  • the automatic lamp control circuit 20 has ports connected to the lamp switch 10, the power supply section 40, and the lamp section 30. Since the automatic lamp control circuit 20 substitutes for the conventional relays, . a ground line and additional lines may be required for turning on/off the lamp section 30. However, the ground line and additional lines are not necessary in the present invention due to the lamp switch detecting section 208.
  • the lamp switch detecting section 208 is provided between the power supply section 40 and the ground and includes a charging part allowing the lamp switch detecting section 208 to be charged with power supplied from the power supply section 40 and a discharging part for discharging the power from the lamp switch detecting section 208 when the lamp switch 10 is switched-off by the driver, thereby providing a predetermined driving time of the control section 209.
  • the automatic lamp control circuit 20 is not only applied to four headlights including pairs of high and low lamps, but also applied to clearance lights installed at front and rear portions of the vehicle. In addition, the automatic lamp control circuit 20 may be applied to functional lamps.
  • FIG. 5 is a flowchart showing an operating procedure of the autolights system for the vehicle according to one embodiment of the present invention.
  • ⁇ S" represents a step.
  • the lamp switch 10 is in an off state in the daytime so that the lamp section 40 is not operated even if the vehicle is in an ignition-on state.
  • the lamp switch 10 is automatically converted into an on state when the vehicle is in an ignition-on state by providing the automatic lamp control circuit 20 satisfying a duty to turn on daytime running lights for preventing vehicle accidents.
  • the lamp switch detecting section 208 detects whether or not the lamp switch 10 is in the on state and transmits a detected ' ' ⁇ ''• signal to the control section 209.
  • the control section 209 checks whether or not the mode of the ' > • lamp switch 10 is an automatic mode based on the signal (SI). • ' If the mode of the lamp switch 10 is the automatic mode, the light-quantity detecting sensor 2011 installed at the lower boundary surface of the front window detects the resistance value, which varies depending on quantity of light incident into the front window of the vehicle.
  • the light-quantity detecting section 201 including the light-quantity detecting sensor 2011 and the resistor Rl outputs a light- quantity detecting signal to the control section 209.
  • the control section 209 Upon receiving the light-quantity detecting signal, the control section 209 compares the light-quantity detecting signal with a predetermined reference value, thereby determining whether or not this time is the daytime (S2). If this time is not the daytime, the control section 209 checks whether or not it is an early evening (S3). If this time is the early evening, the control section 209 switches on the first relay 2031 by outputting a PWM-on signal to the first relay 2031 through the second switch 206 for automatically turning on/off the taillights of the lamp section 30.
  • S2 daytime
  • S3 early evening
  • the taillights of the lamp section 30 When the first relay 2031 is switched on, battery voltage supplied from the power supply section 40 is inputted into the taillights of the lamp section 30 so that the taillights are turned on (S4).
  • Such intelligent algorithm can be applied to all kinds of vehicles so that it is not required to differently set a control value thereof according to sorts of the vehicles.
  • the resistance value varied depending on intensity of illumination around the vehicle is continuously detected by means of the light-quantity detecting sensor 2011 so as to determine whether or not this time is the nighttime (S5). If this time is not the nighttime, the procedure is returned to step S4. If this time is the nighttime, the control section 209 switches on the second relay
  • the second relay 2032 When the second relay 2032 is switched .on, battery voltage supplied from the t 1 ' power supply section 40 is inputted into the headlights of the lamp section 30 so that ! . '' turned on with brightness of PWM 100% (S6). At this time, the brightness of the " headlights can be adjusted in multiple levels by converting a pulse width modulation signal through the program stored in the control section 209 according to intensity of illumination detected by the light-quantity detecting section 201.
  • the vehicle movement detecting section 202 detects a vehicle velocity and transmits the vehicle velocity to the control section 209 as a movement state detecting signal in the form of a pulse.
  • the control section 209 determines whether or not the vehicle is in a temporary stop state (signal wait: within 10 seconds with maintaining constant R.P.M) (S7).
  • control section 209 changes the pulse width modulation signal so as to reduce brightness of the headlights or to turn off the headlights (S8).
  • the vehicle movement detecting section 202 continuously detects the vehicle velocity and the control section 209 determines whether or not the vehicle starts to run after the temporary stop has been finished based on the movement state detecting signal transmitted from the vehicle movement detecting section 202 (S9). If the vehicle starts to run, the procedure is returned to step S6 while operating the headlights with brightness of PWM 100%.
  • the brightness of the headlights may be controlled through the PWM control based on intensity of illumination. In the nighttime, the headlights may be controlled to have the brightness of PWM 100%.
  • the learning function for the intelligent vehicle movement characteristic is added to the control section 209. That is, the control section 209 learns the dynamic characteristic of the engine R.P.M, so that the control section 209 performs the control operation when the vehicle runs and stops the control operation when the vehicle stops. If the vehicle slightly moves due to a traffic jam, the control operation of the control section 209 is not carried out.
  • control section 209 determines that the vehicle is in a parking state, so that the control section 209 outputs a PWM-off signal to the first and second relays 2031 and 2032, thereby switching off the first and second relays 2031 and 2032 for turning off the lamp section 30.
  • the lamp switch detecting section 208 detects the operation of the lamp switch 10 and sends a signal to the control section 209. At this time, the control section determines whether or not the mode of the lamp switch 10 is the second manual mode capable of compulsorily turning on/off the lamp section 30 based on the signal inputted thereto from the lamp switch detecting section 208 (SI 1).
  • the lamp section 30 is automatically turned off when the vehicle stops, if the driver wants to continuously maintain the turn-on state of the lamp section 30, the driver switches on the lamp switch 10 within a predetermined time after switching off the lamp switch 10 for achieving the second manual mode capable of continuously maintaining the turn-on state of the lamp section 30.
  • the lamp switch detecting section 208 continuously transmits signals to the control section 209, so that the control section 209 may convert the automatic mode into the manual mode through a default manner. Therefore, the lamp switch detecting section 208 switches on the first or second relay 2031 or 2032 so that power is supplied to the lamp section 30.
  • the control section 209 determines that the driver does not want to operate the lamp section 30, so the off state of the first and second relays 2031 and 2032 are continuously maintained.
  • the control section 209 allows the taillights of the lamp section 30 to maintain the on-state for 15 minutes and allows the headlights of the lamp section 30 to maintain the on-state for 5.
  • minutes (SI 2) After that, the procedure is returned to step 1. If the daytime is determined in step 2, the control section 209 switches on the second relay 2032 by outputting the PWM-on signal to the second relay 2032 such that the headlights act as daytime running lights.
  • the second relay 2032 When the second relay 2032 is switched on, battery voltage supplied from the power supply section is inputted into the headlights so that the headlights are turned on with brightness in a range about 20 to 70% PWM. At this time, the brightness of the headlights can be adjusted in multiple levels by converting a pulse width modulation signal through the program stored in the control section 209 according to intensity of illumination detected by the light-quantity detecting section 201 (S21).
  • the vehicle movement detecting section 202 detects a vehicle velocity and transmits the vehicle velocity to the control section 209 as a movement state detecting signal in the form of a pulse.
  • the control section 209 determines whether or not the vehicle is in a temporary stop state based on the movement state detecting signal (S22).
  • control section 209 changes the pulse width modulation signal so as to reduce brightness of the headlights or to turn off the headlights (S23).
  • the vehicle movement detecting section 202 continuously detects the vehicle velocity and the control section 209 determines whether or not the vehicle starts to run after the temporary stop has been finished based on the movement state detecting signal transmitted from the vehicle movement detecting section 202 (S24). If the vehicle starts to run, the procedure is returned to step S21 while operating the headlights with brightness in the range of 20 to 75%.
  • control section 209 determines that the vehicle is in a parking state, so that the control section 209 outputs a PWM-off signal to the second relay 2032, thereby switching off the second relay 2032 to turn off the headlights.
  • step STT When the second relay 2032 is switched off, battery voltage supplied to the lamp section 30 from the power supply section 40 is -shut 'off so that the headlights are tUri ed off (S25). Then, the procedure is returned to step STT .
  • the daytime running lights are necessary because persons relatively relax their attention in the daytime as compared with the nighttime, and the persons cannot easily recognize vehicles coming into flank sides of the persons. In particular, wheii the vehicle running at a high speed suddenly comes into the persons on the walking, a fatal vehicle accident may occur, thereby causing a loss of lives and property. For this reason, advanced countries make a duty or recommend drivers to turn on the taillights and headlights when driving the vehicle in such a manner that the persons on the walking can easily recognize the vehicle.
  • the autolights system of the present invention may satisfy the duty while adjusting the brightness of headlights in multi levels depending on intensity of illumination around the vehicle and the movement of the vehicle, so fuel consumption can be reduced (500,000 won in bus and 200,000 won in private car can be reduced per year) without significantly shortening lift span of the headlights.
  • the lamp switch detecting section 208 detects the operation of the lamp switch 10 and outputs a signal to the control section 209.
  • the control section 209 determines whether or not the mode is the first manual mode capable of manually turning on/off the lamp section 30 based on the signal (S31).
  • the lamp section 30 is manually turned on/off by manually manipulating the lamp switch 10. If the mode is not the first manual mode, the procedure is returned to step 11.
  • the ampere detecting section 204 detects an amount of current applied to the lan ⁇ section and sends, the current detecting signal to the control section. Accordingly, the control section 209 checks the current value and determines that the lamp section 30. is in a normal state if the current value is within a predetermined reference value.
  • the control section 209 determines that at least one of the headlights and taillights has a fault, so the control section 209 sends a buzzing sound command signal to the buzzer switch 207. Accordingly, the buzzer switch 209 is turned on, thereby generating the buzzing sound. Thus, the driver can easily inspect the headlights or the taillights.
  • the light-quantity detecting sensor 2011 and the vehicle movement detecting section 202 are included in the automatic lamp control circuit so as to turn on/off the headlights and taillights based on the selective operation of the light-quantity detecting sensor 2011 or the vehicle movement detecting section
  • the light-quantity detecting sensor 201 1 can be connected only to the taillights so as to automatically turn on/off the taillights based on the light-quantity detecting signal
  • the vehicle movement detecting section 202 can be connected only to the headlights so as to so as to automatically turn on/off the headlights based on the movement state detecting signal.
  • the light- quantity detecting sensor 2011 and the vehicle movement detecting section 202 are included in the automatic lamp control circuit 20 with four lamps, it is also possible to provide an additional third switch (not shown) connected to both light-quantity detecting sensor 2011 and vehicle movement detecting section 202 and a lamp power supply switch (not shown) connected to the additional third switch while controlling the additional third switch and the lamp power supply switch by using one microprocessor.
  • the automatic , lamp control circuit 20- is not only applied to the headlights including four lamps, such as pairs of high lamps and low lamps, but also applied to the taillights including clearance lights and ' brake lights.
  • the • automatic lamp control circuit 20 can be applied to all functional lamps used for the vehicle.
  • the light-quantity detecting sensor 201 1 and the vehicle movement detecting section 202 can be connected to one microprocessor in a row.
  • the autolights system for the vehicle includes the light-quantity detecting sensor installed at the lower boundary surface of the front window of the vehicle such that the light-quantity detecting sensor can precisely detect quantity of light incident into the front window of the vehicle, so the autolights system can be stably operated even if dust or impurities exist in vicinity of the light-quantity detecting sensor.
  • the low lamps of headlights are turned in such a manner that brightness of the low lamps in the daytime is about 70%) of brightness of low lamps in the nighttime.
  • the brightness of the headlights can be automatically controlled through the PWM control, so the autolights system according to the present invention can satisfy the duty to turn on the daytime running lights for preventing vehicle accident while reducing fuel consumption.
  • brightness of the headlights and taillights is gradually increased or decreased by automatically controlling the headlights and taillights through the PWM- on/off control depending on intensity of illumination around the vehicle so that the thermal expansion phenomenon of the filament can be prevented, thereby lengthening the life span of the headlights and taillights.
  • the brightness of the headlights is variably controlled depending on intensity of illumination around the vehicle and the movement of the vehicle so that the headlights are prevented from being unnecessarily operated when the vehicle stops waiting for the signal.
  • the present invention uses four ports, which, are used for the conventional relay, the autolights system of the present invention can easily substitute for the conventional relay without requiring additional " devices or. ' peripheral elements:
  • the present invention can achieve superior performance without requiring an additional ground line by allowing existing switches to have a grounding function.
  • the present invention can match with various desires of the driver by enabling the driver to turn on/off headlights or taillights even if the engine stops by detecting an operational state of the engine.

Abstract

Disclosed is an autolights system for a vehicle. The autolights system includes a light-quantity detecting sensor, a vehicle movement detecting section, a lamp power supply switch, a first switch, which is switched-on when a lamp switch operated by a driver is switched-on so as to generate a lamp switch-on signal, at least two second switches for transmitting a lamp switching command signal to the lamp power supply switch, a lamp switch detecting section for continuously generating switching signals so as to allow the lamp section to be maintained in a turn-on state, and a control section for controlling above elements. Fuel consumption is reduced, a life span of the lamp section is lengthened, and a short circuit or an error is easily detected through a buzzing sound. The autolights system is stably operated even if dust or impurities exist in vicinity of a sensor. The headlights and taillights are differentially turned on/off depending on intensity of illumination around the vehicle and a movement of the vehicle. Brightness of the headlights is automatically controlled through a PWM control, so that it is not required for a driver to frequently manipulate the lamp switch, thereby providing convenience of use.

Description

AUTOLIGHTS SYSTEM FOR VEHICLE
Technical Field The present invention relates to an autolights system for a vehicle, and more particularly to an autolights system for a vehicle capable of automatically controlling an on/off operation of lamps (headlights and tail lamps) and adjusting brightness of the lamps based on a movement of the vehicle and quantity of light.
Background An
Generally, clearance lamps called tail lamps are installed at front and rear portions of a vehicle so as to allow other drivers to recognize the vehicle. The tail lamps are manually turned on or off by a driver. Under a relatively dark circumstance, such as an early morning, an early evening, or a cloudy weather, or when entering into a tunnel, the driver must manually turn on the tail lamps while driving a vehicle, causing the driver to feel inconvenience.
In addition, in the night or when passing through the tunnel, headlights lightens a forward area of the vehicle so as to allow the driver to safely drive the vehicle. The headlights must have sufficient brightness capable of showing an object, which is positioned about one hundred meters ahead. In addition, light radiated from the headlights must be dispersed such that the driver may recognize a peripheral circumstance of the vehicle, without dazzling other drivers traveling along an opposite traffic lane.
FIG. I is a view showing a structure of a conventional lamp switching apparatus used for headlights or tail lamps.
A lamp switch 1 called a "combination lever switch" is installed adjacent to a handle so as to allow a driver to easily select a tail mode or a head mode for turning on/off tail lamps or the headlights. A power supply section 4 supplies power for turning on various lamps. A first relay 2 transfers power of the power supply section 4 to tail lamps 5 and 6 when the lamp switch 1 is positioned in the tail mode in order to turn on the tail lamps 5 and 6. A second relay 3 transfers power of the power supply section 4 to left and right headlights 7 and 8 when the lamp switch 1 is positioned in the head mode so as to turn on the left and right headlights 7 and 8. A dimmer switch 9 is manually operated by means of the driver so as to selectively operate headlights or passing lights. When a terminal (a) of the dimmer switch 9 is connected to a common terminal (c), current is applied to filaments LI and L3 so that low beam is generated from the headlights. In addition, when a terminal (b) of the dimmer switch 9 is connected to the common terminal (c), current is applied to filaments L2 and L4, so that high beam is generated from the passing lights. In the night or in a foggy day or a cloudy day, or when passing through a tunnel, the driver must manually turn on/off headlights 7 and 8 and taillights 5 and 6 by handling the lamp switch 1, so it is very inconvenient for the driver. In addition, if the driver runs the vehicle without turning off the headlights 7 and 8 and the taillights 5 and 6, discharge of a battery may occur. In addition, mechanical relays 2 and 3 are manually operated by the driver in order to safely and conveniently control an air conditioner fan, headlights and a klaxon, which cause great current consumption. However, since the mechanical relays 2 and 3 are used for operating the components- causing great current consumption, overload is applied to the mechanical relays 2 and 3 when switching the mechanical relays 2 and 3. Moreover, the overload is also applied to the headlights 7 and 8, thereby shortening a lift span of the headlights, 7 and 8.
In order to overcome the disadvantages of such mechanical relays 2 and 3, there has been suggested an automatic switching module, which is connected to the headlights 7 and 8 in order to automatically turn on/off the headlights 7 and 8, thereby automatically controlling and protecting the headlights 7 and 8. However, a method for protecting the mechanical relays 2 and 3 has not been suggested. That is, although the automatic switching module may automatically turn of/off and protect the headlights 7 and 8 and taillights 5 and 6, such protecting function of the automatic switching module can be carried out by directly controlling the mechanical relays 2 and 3, so it is impossible to protect the mechanical relays 2 and 3.
In addition, although a module for automatically controlling the headlights 7 and 8 and taillights 5 and 6 has been developed, existing equipment must be replaced with new equipment in order to use the module.
As described above, since the mechanical relays 2 and 3 mechanically controls the headlights 7 and 8 and taillights 5 and 6 through mechanical contacts thereof, the life span of the headlights 7 and 8 and taillights 5 and 6 may be shortened. In addition, an additional device is necessary for automatically controlling the headlights 7 and 8 and taillights 5 and 6, causing additional cost.
In addition, there has been suggested a method for automatically controlling taillights 5 and 6 according to variation of brightness around the vehicle. According to the above method, as shown in FIG. 2, light-quantity detecting sensors are installed at an upper end of a front window (a) of the vehicle and an upper portion of an instrument panel (b) capable of directly detecting the light. However, such a method may cause a problem that the taillights sensitively respond to light generated from streetlights, neon- sign lamps, displays installed in the street so that the taillights are frequently turned on/off. In addition, if dust or impurities exist in vicinity of the light-quantity detecting • sensors or the vehicle is spattered with mud, the taillights may malfunction.
Disclosure of the Invention Therefore, the present invention has been made in view of the abovementioned problems, and it is a first object of the present invention to provide an autolights system for a vehicle, in which a light-quantity detecting sensor is installed at a lower boundary surface of a front window so as to precisely detect quantity of light incident into the front window, so that the autolights system can be stably operated. A second object of the present invention is to provide an autolights system for a vehicle capable of adjusting brightness of a headlight in a daytime in such a manner that the brightness of the headlight in the daytime is less than 70% of the brightness of the headlight in the night, in which the brightness of the headlight is automatically adjusted under a PWM (pulse width modulation) control according to brightness around the vehicle, thereby reducing fuel consumption while satisfying a duty to turn on daytime running lights for preventing vehicle accidents.
A third object of the present invention is to provide an autolights system for a vehicle capable of gradually increasing or decreasing brightness of headlights and taillights under a PWM control according to brightness around the vehicle, thereby preventing a thermal expansion phenomenon of a filament and lengthening a life span of headlights/taillights, and capable of controlling brightness of headlights according to a movement of the vehicle and brightness around the vehicle, thereby preventing the headlights from being unnecessarily turned on/off when the vehicle stops waiting for a traffic signal. A fourth object of the present invention is to provide an autolights system for a vehicle capable of replacing conventional relays by using four ports, which are used for the conventional relays, without requiring additional devices or exchanging peripheral elements, and capable of achieving superior performance without requiring an additional ground line by allowing existing switches to have a grounding function.
A fifth object of the present invention is to provide an autolights system for a vehicle, which matches with various desires of a driver by enabling the driver to turn on/off headlights or taillights even if an engine stops by detecting an operational state of the engine.
In order to accomplish these objects, according to a first aspect of the present invention, there is provided an autolights system for a vehicle, the autolights system comprising: a light-quantity detecting sensor for generating a light-quantity detecting signal by detecting quantity of light or a vehicle movement detecting section for generating a movement state detecting signal based on a running state of the vehicle; at least two lamp power supply switches, which are switched-on so as to supply power to a lamp section; a first switch, which is switched-on when a lamp switch operated by a driver is switched-on so as to generate a lamp switch-on signal; at least two second switches, which are switched-on based on a lamp switching command signal for turning on the lamp section, the second switch transmitting the lamp switching command signal to the lamp power supply switch; a lamp switch detecting section for continuously generating switching signals so as to allow the lamp section to be maintained in a turn- on state by detecting on/off signals, which are generated after an initial on-state of the lamp switch; and a control section detecting an input of a switch-on signal of the lamp switch, outputting a turn-on signal to each of the second switches connected to the headlights and taillights in such a manner that the headlights or the taillights is automatically turned on when the light-quantity detecting signal or the movement state detecting signal is generated, and converting an automatic mode of the lamp switch into a manual mode through a default manner if turn-on signals are continuously generated.
According to a preferred embodiment of the present invention, an ampere detecting section is further provided for generating a current detecting signal based on an amount of current used in the lamp in order to diagnose an error of the lamp section. The ampere detecting section transmits the current detecting signal to the control section.
A buzzer switch, which is switched on based on a buzzing sound generating signal when the lamp section is faulted, is further provided. The buzzer switch transmits the buzzing sound generating signal to the vehicle movement detecting section. The lamp switch detecting section is provided between a power supply section and a ground and includes a charging part allowing the lamp switch detecting section to be charged with power supplied from the power supply section and a discharging part for discharging the power from the lamp switch detecting section when the lamp switch is switched-off by the driver, thereby providing a predetermined driving time of the control section.
According to a second aspect of the present invention, there is provided an autolights system for a vehicle used for automatically turning on/off headlights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section automatically turning on/off the headlights based on the intensity of illumination detected by the light-quantity detecting sensor, and adjusting brightness of the headlights within PWM 70%; a relay for turning on/off the headlights according to a PWM signal generated from the control section; and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity. The control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlights is constantly maintained when the vehicle runs, brightness of the headlights is reduced or the headlights are turned off when the vehicle temporarily stops, and the headlights are turned off when the vehicle is in a parking state. Thus, the autolights system acts as daytime running lights.
According to a third aspect of the present invention, there is provided an autolights system for a vehicle used for automatically turning on/off headlights and taillights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section for differentially turning on/off the headlights and taillights based on the intensity of illumination detected by the light-quantity detecting sensor, and for outputting a PWM signal to adjust brightness of the headlights; first and second relays for automatically turning on/off the headlights and taillights according to the PWM signal generated from the control section, and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity The control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlights is constantly maintained when the vehicle runs, brightness of the headlights is reduced or the headlights are turned off when the vehicle temporarily stops, and the headlights are turned off when the vehicle is in a parking state.
According to a fourth aspect of the present invention, there is provided an autolights system for a vehicle used for manually turning on/off headlights and taillights of the vehicle, the autolights system comprising: a lamp switch detecting section for detecting an operational state of the lamp switch in order to manually turning on/off the headlights and the tail lights; a control section for outputting a PWM signal to turn on/off the headlights and taillights based on the operational state detected by the lamp switch detecting section; first and second relays for manually turning on/off the headlights and taillights according to the PWM signal generated from the control section; and a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity. The control section receives the vehicle velocity from the vehicle movement detecting section and outputs the PWM signal to the first and second relays in order to compulsorily turn on/off the headlights and tail lights for a predetermined time even if an operation of an engine stops
Brief Description of the Drawings The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:
FIG. 1 is a view showing a structure of a conventional lamp switching apparatus;
FIG. 2 is a view showing conventional light-quantity detecting sensors installed in a vehicle;
FIG. 3 is a view showing a light-quantity detecting sensor and an automatic lamp controlling apparatus installed in a vehicle according to one embodiment of the present invention;
FIG. 4 is a block view showing a structure of an autolights system for a vehicle according to one embodiment of the present invention; and
FIG. 5 is a flowchart showing an operating procedure of an autolights system for a vehicle according to one embodiment of the present invention.
Best Mode for Carrying Out the Invention
Reference will now be made in detail to the preferred embodiments of the present invention.
In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
FIG. 3 is a view showing a light-quantity detecting sensor and an automatic lamp controlling apparatus installed in a vehicle according to one embodiment of the present invention. As shown in FIG. 3, a light-quantity detecting sensor 2011 is attached to a lower boundary surface of a front window of a vehicle for detecting quantity of light, which varies according to brightness around the vehicle. An automatic lamp control circuit 20 is connected to the light-quantity detecting sensor 2011 through a wire 501 so as to turn on/off headlights and taillights. The automatic lamp control circuit 20 is installed on a socket 50, which is used for a conventional relay, so that the automatic lamp control circuit 20 substitutes for the conventional relay without requiring additional devices or 20
exchanging peripheral elements.
The light-quantity detecting sensor 2011 includes cadmiumsulfide (CDS), which is an element capable of detecting intensity of illumination. The light-quantity detecting sensor 2011 does not locally detect the intensity of illumination, but detect the intensity of illumination based on quantity of light incident into the whole area of a front window of the vehicle and a mean value thereof, so that the light-quantity detecting sensor 2011 can stably operate even if dust or impurities exist in vicinity of the light-quantity detecting sensor 2011 or the vehicle is spattered with mud.
FIG. 4 is a block view showing a structure of the autolights system for the vehicle according to one embodiment of the present invention.
As shown in FIG. 4, the autolights system of the present invention includes a lamp switch 10, an automatic lamp control circuit 20, a lamp section 30 and a power supply section 40.
The lamp switch 10 is a kind of a manual switch,, which is manually operated by a driver so as to turn on/off the lamp section, 30 including headlights and taillights. The lamp switch 10 is a combination lever switch, which is movable into a first manual mode for maintaining a manual switching function of the lamp section 30, an automatic mode for automatically turning on/off the taillights according to illumination around the vehicle, automatically turning on/off the headlights according to illumination around the vehicle and a movement of the vehicle, and adjusting brightness of the headlights in a multi-level, and a second manual mode for selectively turning on/off the lamp section 30 even if an engine stops.
The lamp section 30 signifies the headlights or taillights. In case of the headlights, a high lamp and a low lamp are provided in each of left and right headlights. In case of the taillights, four clearance lights are provided at both sides of front and rear portions of the vehicle.
The power supply section 40 signifies a battery for supplying power to the lamp section 30.
The automatic lamp control circuit 20 includes a light-quantity detecting section 201, a vehicle movement detecting section 202, a lamp power supply switch 203, an ampere detecting section 204, a first switch 205, a second switch 206, a buzzer switch 207, a lamp switch detecting section 208, and a control section 209.
The light-quantity detecting section 201 has the light-quantity detecting sensor 2011, which detects a resistance value varied depending on quantity of light incident into the vehicle so as t generate a light-quantity detecting signal and a resistor Rl .
The vehicle movement detecting section 202 includes a pickup sensor 2021 and a pulse shaper 2022. The pickup sensor 2021 is wound around an ignition cable so as to detect the movement of the vehicle runs or stops. That is, the pickup sensor 2021 detects a vehicle velocity and output a velocity signal as a pulse, thereby generating a vehicle movement detecting signal.
The lamp power supply switch 203 is a kind of a relay for supplying power of the power supply section 40 to the lamp section 30. The lamp power supply switch 203 includes a first digital smart relay 2031 for driving IGBT and a second digital smart relay 2032 for driving IGBT. The first digital smart relay 2031 supplies battery voltage, which is provided from the power supply section 40 according to a PWM signal generated from the control section 209, to the taillights of the lamp section 30, thereby turning on/of the taillights. The second digital smart relay 2032 supplies battery voltage, which is provided from the power supply section 40 according to the PWM signal generated from the control section 209, to the headlights of the lamp section 30, thereby turning on/of the headlights and variably adjusting brightness of the headlight.
In addition, the ampere detecting section 204 detects ampere based on the resistance value of the lamp section 30, thereby generating a current detecting signal so as to diagnose an error of the lamp section 20.
The first switch 205 is switched-on when the lamp switch 10 is switched-on, thereby generating a lamp switch-on signal and the second switch 206 is switched-on when a lamp switching command signal is generated for turning on/off the lamp section 30 and transfers the lamp switching command signal to the lamp power supply switch 203. The buzzer switch 207 is switched on when a buzzing sound command signal is transmitted thereto from the control section 209, thereby generating a buzzing sound notifying that the lamp section 30 has a fault. In addition, the first switch 205, the second switch 206 and the buzzer switch 207 include a photo coupler and the lamp power supply switch 203 and the ampere detecting section 204 are integrally formed with a power transistor.
The lamp switch detecting section 208 continuously generates a switching signal by detecting on off signals, which are generated after the lamp switch 10 is initially switched-on, in such a manner that the lamp section 30 is continuously switched
The control section 209 detects an input of the lamp switch-on signal based on a signal inputted from the lamp switch detecting section 208, thereby determining a switching mode of the lamp section 30, that is the manual mode or the automatic mode If the switching signal is continuously generated, the automatic mode for the lamp section 30 is converted into the manual mode through a default manner.
In the automatic mode, the control section 209 determines the daytime or nighttime based on a light-quantity detecting signal inputted from the light-quantity detecting section so as to differentially turn on/off the headlights and taillights of the lamp section 30. To this end, the control section controls the lamp power supply switch
203 through a PWM on/off control. That is, the control section 209 detects the movement of the vehicle based on the vehicle movement detecting signal inputted from the vehicle movement detecting section 202 so as to vary a pulse width modulation signal depending on the movement of the vehicle and intensity of illumination around the vehicle and stores a program (pattern) for variably controlling brightness of the lamp section 30. In addition, the control section outputs a buzzing sound generating signal based on a current detecting signal inputted thereto from the ampere detecting section
204 so as to operate the buzzer switch 207.
In the daytime, the control section 209 may control brightness of the lamp section 30 through a PWM control depending on intensity of illumination around the vehicle so as to use the headlights of the lamp section 30 as daytime running lights. In the night, the control section 209 may control brightness of the lamp section 30 such that the lamp section 30 has brightness of PWM 100%. In addition, a learning function for an intelligent vehicle movement characteristic is added to the control section 209. That is, the control section 209 learns a dynamic characteristic of an engine R P.M, so that the control section 209 performs the control operation when the vehicle runs and ' stops the control operation when the vehicle stops. If the vehicle slightly moves due to a traffic jam, the control operation of the control section 209 is not carried out.
In addition, the control section 209 gradually increases or decreases the brightness of the lamp section 30 when turning on/off the lamp section 30 so as to prevent a filament of the lamp section 30 from being oxidized. The above function is achieved through a pulse width modulation (PWM) control capable of obtaining a smooth output by converting equivalent voltage of pulse width into a sine wave phase.
As shown in FIG. 4, the automatic lamp control circuit 20 uses four ports T_SW, T_POWER, T_LAMP_IN, and T_LAMP_OUT, which are used for conventional relays. In detail, the automatic lamp control circuit 20 has ports connected to the lamp switch 10, the power supply section 40, and the lamp section 30. Since the automatic lamp control circuit 20 substitutes for the conventional relays, . a ground line and additional lines may be required for turning on/off the lamp section 30. However, the ground line and additional lines are not necessary in the present invention due to the lamp switch detecting section 208.
The lamp switch detecting section 208 is provided between the power supply section 40 and the ground and includes a charging part allowing the lamp switch detecting section 208 to be charged with power supplied from the power supply section 40 and a discharging part for discharging the power from the lamp switch detecting section 208 when the lamp switch 10 is switched-off by the driver, thereby providing a predetermined driving time of the control section 209.
The automatic lamp control circuit 20 is not only applied to four headlights including pairs of high and low lamps, but also applied to clearance lights installed at front and rear portions of the vehicle. In addition, the automatic lamp control circuit 20 may be applied to functional lamps.
Hereinafter, an operation of the autolights system for the vehicle having the above construction will be described.
FIG. 5 is a flowchart showing an operating procedure of the autolights system for the vehicle according to one embodiment of the present invention. In FIG. 5, αS" represents a step.
Generally, the lamp switch 10 is in an off state in the daytime so that the lamp section 40 is not operated even if the vehicle is in an ignition-on state. However, according to the present invention, the lamp switch 10 is automatically converted into an on state when the vehicle is in an ignition-on state by providing the automatic lamp control circuit 20 satisfying a duty to turn on daytime running lights for preventing vehicle accidents.
The operation of the autolights system for the vehicle will be described on the assumption that the lamp switch 10 is in the on state. Firstly, when the driver starts the vehicle, the lamp switch detecting section 208 detects whether or not the lamp switch 10 is in the on state and transmits a detected ''■''• signal to the control section 209. Upon receiving the signal from the lamp switch detecting section 208, the control section 209 checks whether or not the mode of the '>• lamp switch 10 is an automatic mode based on the signal (SI). • ' If the mode of the lamp switch 10 is the automatic mode, the light-quantity detecting sensor 2011 installed at the lower boundary surface of the front window detects the resistance value, which varies depending on quantity of light incident into the front window of the vehicle. In addition, the light-quantity detecting section 201 including the light-quantity detecting sensor 2011 and the resistor Rl outputs a light- quantity detecting signal to the control section 209.
Upon receiving the light-quantity detecting signal, the control section 209 compares the light-quantity detecting signal with a predetermined reference value, thereby determining whether or not this time is the daytime (S2). If this time is not the daytime, the control section 209 checks whether or not it is an early evening (S3). If this time is the early evening, the control section 209 switches on the first relay 2031 by outputting a PWM-on signal to the first relay 2031 through the second switch 206 for automatically turning on/off the taillights of the lamp section 30.
When the first relay 2031 is switched on, battery voltage supplied from the power supply section 40 is inputted into the taillights of the lamp section 30 so that the taillights are turned on (S4). The taillights controlled under an intelligent algorithm managed by two fixed thresholds and two variable dynamic thresholds, so that the taillights are turned on in the early evening and are not turned on when the vehicle passes through a shadow area, or when the vehicle runs below an elevated road. Such intelligent algorithm can be applied to all kinds of vehicles so that it is not required to differently set a control value thereof according to sorts of the vehicles.
After the taillights have been turned on, the resistance value varied depending on intensity of illumination around the vehicle is continuously detected by means of the light-quantity detecting sensor 2011 so as to determine whether or not this time is the nighttime (S5). If this time is not the nighttime, the procedure is returned to step S4. If this time is the nighttime, the control section 209 switches on the second relay
2032 by outputting a PWM-on signal to the second relay 2032 through the second '■ ' switch 206 for automatically turning on/off the headlights of the lamp section 30.
When the second relay 2032 is switched .on, battery voltage supplied from the t1' power supply section 40 is inputted into the headlights of the lamp section 30 so that !. '' turned on with brightness of PWM 100% (S6). At this time, the brightness of the " headlights can be adjusted in multiple levels by converting a pulse width modulation signal through the program stored in the control section 209 according to intensity of illumination detected by the light-quantity detecting section 201.
Then, the vehicle movement detecting section 202 detects a vehicle velocity and transmits the vehicle velocity to the control section 209 as a movement state detecting signal in the form of a pulse. Upon receiving the movement state detecting signal, the control section 209 determines whether or not the vehicle is in a temporary stop state (signal wait: within 10 seconds with maintaining constant R.P.M) (S7).
If the vehicle is in the temporary stop state, the control section 209 changes the pulse width modulation signal so as to reduce brightness of the headlights or to turn off the headlights (S8).
Then, the vehicle movement detecting section 202 continuously detects the vehicle velocity and the control section 209 determines whether or not the vehicle starts to run after the temporary stop has been finished based on the movement state detecting signal transmitted from the vehicle movement detecting section 202 (S9). If the vehicle starts to run, the procedure is returned to step S6 while operating the headlights with brightness of PWM 100%.
The brightness of the headlights may be controlled through the PWM control based on intensity of illumination. In the nighttime, the headlights may be controlled to have the brightness of PWM 100%. In addition, as mentioned above, the learning function for the intelligent vehicle movement characteristic is added to the control section 209. That is, the control section 209 learns the dynamic characteristic of the engine R.P.M, so that the control section 209 performs the control operation when the vehicle runs and stops the control operation when the vehicle stops. If the vehicle slightly moves due to a traffic jam, the control operation of the control section 209 is not carried out.
If the vehicle does not start to run, the control section 209 determines that the vehicle is in a parking state, so that the control section 209 outputs a PWM-off signal to the first and second relays 2031 and 2032, thereby switching off the first and second relays 2031 and 2032 for turning off the lamp section 30.
When the first and second relays 2031 and 2032 are switched off, battery voltage supplied to the lamp section 30 from the power supply section 40 is shut off so that the lamp section 30 is turned off (SI 0).
In this state, if the driver wishes to turn on the lamp section 30, it is necessary for the driver to manipulate the lamp switch 10, that is, the driver must switch off and switch on the lamp switch 10 in order to turn on a required lamp. In this case, the lamp switch detecting section 208 detects the operation of the lamp switch 10 and sends a signal to the control section 209. At this time, the control section determines whether or not the mode of the lamp switch 10 is the second manual mode capable of compulsorily turning on/off the lamp section 30 based on the signal inputted thereto from the lamp switch detecting section 208 (SI 1).
Although the lamp section 30 is automatically turned off when the vehicle stops, if the driver wants to continuously maintain the turn-on state of the lamp section 30, the driver switches on the lamp switch 10 within a predetermined time after switching off the lamp switch 10 for achieving the second manual mode capable of continuously maintaining the turn-on state of the lamp section 30.
That is, the lamp switch detecting section 208 continuously transmits signals to the control section 209, so that the control section 209 may convert the automatic mode into the manual mode through a default manner. Therefore, the lamp switch detecting section 208 switches on the first or second relay 2031 or 2032 so that power is supplied to the lamp section 30.
In addition, if the lamp switch 10 is not returned to the on-state within the predetermined time, the control section 209 determines that the driver does not want to operate the lamp section 30, so the off state of the first and second relays 2031 and 2032 are continuously maintained.
In the second manual mode, the control section 209 allows the taillights of the lamp section 30 to maintain the on-state for 15 minutes and allows the headlights of the lamp section 30 to maintain the on-state for 5. minutes (SI 2): After that, the procedure is returned to step 1. If the daytime is determined in step 2, the control section 209 switches on the second relay 2032 by outputting the PWM-on signal to the second relay 2032 such that the headlights act as daytime running lights.
When the second relay 2032 is switched on, battery voltage supplied from the power supply section is inputted into the headlights so that the headlights are turned on with brightness in a range about 20 to 70% PWM. At this time, the brightness of the headlights can be adjusted in multiple levels by converting a pulse width modulation signal through the program stored in the control section 209 according to intensity of illumination detected by the light-quantity detecting section 201 (S21).
In addition, the vehicle movement detecting section 202 detects a vehicle velocity and transmits the vehicle velocity to the control section 209 as a movement state detecting signal in the form of a pulse. Upon receiving the movement state detecting signal, the control section 209 determines whether or not the vehicle is in a temporary stop state based on the movement state detecting signal (S22).
If the vehicle is in the temporary stop state, the control section 209 changes the pulse width modulation signal so as to reduce brightness of the headlights or to turn off the headlights (S23).
Then, the vehicle movement detecting section 202 continuously detects the vehicle velocity and the control section 209 determines whether or not the vehicle starts to run after the temporary stop has been finished based on the movement state detecting signal transmitted from the vehicle movement detecting section 202 (S24). If the vehicle starts to run, the procedure is returned to step S21 while operating the headlights with brightness in the range of 20 to 75%.
If the vehicle does not start to run, the control section 209 determines that the vehicle is in a parking state, so that the control section 209 outputs a PWM-off signal to the second relay 2032, thereby switching off the second relay 2032 to turn off the headlights.
When the second relay 2032 is switched off, battery voltage supplied to the lamp section 30 from the power supply section 40 is -shut 'off so that the headlights are tUri ed off (S25). Then, the procedure is returned to step STT . The daytime running lights are necessary because persons relatively relax their attention in the daytime as compared with the nighttime, and the persons cannot easily recognize vehicles coming into flank sides of the persons. In particular, wheii the vehicle running at a high speed suddenly comes into the persons on the walking, a fatal vehicle accident may occur, thereby causing a loss of lives and property. For this reason, advanced countries make a duty or recommend drivers to turn on the taillights and headlights when driving the vehicle in such a manner that the persons on the walking can easily recognize the vehicle.
In Korea, the Ministry of Transportation recommends the drivers to turn on the taillights and headlights when driving the vehicle, but it is not efficiently performed due to a driving habit and lacks of driver's recognition. However, it will be expected that the recommendation may be reinforced as a duty. The autolights system of the present invention may satisfy the duty while adjusting the brightness of headlights in multi levels depending on intensity of illumination around the vehicle and the movement of the vehicle, so fuel consumption can be reduced (500,000 won in bus and 200,000 won in private car can be reduced per year) without significantly shortening lift span of the headlights.
In addition, if the mode is not the automatic mode in step SI and the driver turns on the lamp switch 10 after turning off the lamp switch 10 in order to manually turn on/off the lamp section 30, the lamp switch detecting section 208 detects the operation of the lamp switch 10 and outputs a signal to the control section 209. Upon receiving the signal from the lamp switch detecting section 208, the control section 209 determines whether or not the mode is the first manual mode capable of manually turning on/off the lamp section 30 based on the signal (S31).
If the mode is the first manual mode, the lamp section 30 is manually turned on/off by manually manipulating the lamp switch 10. If the mode is not the first manual mode, the procedure is returned to step 11.
In addition, if the lamp section 30 is turned on, the ampere detecting section 204 detects an amount of current applied to the lanψ section and sends, the current detecting signal to the control section. Accordingly, the control section 209 checks the current value and determines that the lamp section 30. is in a normal state if the current value is within a predetermined reference value.
If the current value is more or less than the predetermined reference value,' the control section 209 determines that at least one of the headlights and taillights has a fault, so the control section 209 sends a buzzing sound command signal to the buzzer switch 207. Accordingly, the buzzer switch 209 is turned on, thereby generating the buzzing sound. Thus, the driver can easily inspect the headlights or the taillights.
Although it is described that the light-quantity detecting sensor 2011 and the vehicle movement detecting section 202 are included in the automatic lamp control circuit so as to turn on/off the headlights and taillights based on the selective operation of the light-quantity detecting sensor 2011 or the vehicle movement detecting section
202, it is also possible to provide only one of the light-quantity detecting sensor 2011 and the vehicle movement detecting section 202 to the automatic lamp control circuit of the present invention.
In detail, the light-quantity detecting sensor 201 1 can be connected only to the taillights so as to automatically turn on/off the taillights based on the light-quantity detecting signal, and the vehicle movement detecting section 202 can be connected only to the headlights so as to so as to automatically turn on/off the headlights based on the movement state detecting signal.
In addition, although it is illustrated in the figures that the light- quantity detecting sensor 2011 and the vehicle movement detecting section 202 are included in the automatic lamp control circuit 20 with four lamps, it is also possible to provide an additional third switch (not shown) connected to both light-quantity detecting sensor 2011 and vehicle movement detecting section 202 and a lamp power supply switch (not shown) connected to the additional third switch while controlling the additional third switch and the lamp power supply switch by using one microprocessor.
Furthermore, the automatic , lamp control circuit 20- is not only applied to the headlights including four lamps, such as pairs of high lamps and low lamps, but also applied to the taillights including clearance lights and ' brake lights. Of course; the • automatic lamp control circuit 20 can be applied to all functional lamps used for the vehicle.
In addition, the light-quantity detecting sensor 201 1 and the vehicle movement detecting section 202 can be connected to one microprocessor in a row.
Industrial Applicability As can be seen from the foregoing, the autolights system for the vehicle includes the light-quantity detecting sensor installed at the lower boundary surface of the front window of the vehicle such that the light-quantity detecting sensor can precisely detect quantity of light incident into the front window of the vehicle, so the autolights system can be stably operated even if dust or impurities exist in vicinity of the light-quantity detecting sensor. When driving the vehicle in the daytime, the low lamps of headlights are turned in such a manner that brightness of the low lamps in the daytime is about 70%) of brightness of low lamps in the nighttime. At this time, the brightness of the headlights can be automatically controlled through the PWM control, so the autolights system according to the present invention can satisfy the duty to turn on the daytime running lights for preventing vehicle accident while reducing fuel consumption. In addition, brightness of the headlights and taillights is gradually increased or decreased by automatically controlling the headlights and taillights through the PWM- on/off control depending on intensity of illumination around the vehicle so that the thermal expansion phenomenon of the filament can be prevented, thereby lengthening the life span of the headlights and taillights. The brightness of the headlights is variably controlled depending on intensity of illumination around the vehicle and the movement of the vehicle so that the headlights are prevented from being unnecessarily operated when the vehicle stops waiting for the signal. In addition, it is possible to reduce a traffic accident rate at the time of sunrise and sunset. Even if the driver suddenly enters into a dark region, such as a tunnel and an underground parking lot, the driver can instantly view the forward region of the vehicle and make communication with other persons so that safety may be ensured when driving the vehicle.
Since the present invention uses four ports, which, are used for the conventional relay, the autolights system of the present invention can easily substitute for the conventional relay without requiring additional " devices or.' peripheral elements: In addition, the present invention can achieve superior performance without requiring an additional ground line by allowing existing switches to have a grounding function.
Moreover, the present invention can match with various desires of the driver by enabling the driver to turn on/off headlights or taillights even if the engine stops by detecting an operational state of the engine.
While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment and the drawings, but, on the contrary, it is intended to cover various modifications and variations within the spirit and scope of the appended claims.

Claims

Claims
1. A autolights system for a vehicle, the autolights system comprising: a vehicle movement detecting section generating a movement state detecting signal by detecting a movement of the vehicle; a lamp power supply switch, which is switched-on so as to supply power to a lamp section; a first switch, which is switched-on when a lamp switch operated by a driver is switched-on so as to generate a lamp switch-on signal; a second switch, which is switched-on based on a lamp switching command signal for turning on the lamp section, the second switch transmitting the lamp switching command signal to the lamp power supply switch; a lamp switch detecting section. for. continuously .generating switching- signals so as to allow the lamp section to be maintained in a turn-on state by detecting oή!/off signals, which are generated after an initial on-state of the lamp switch; and ' '• •' ' a control section detecting an input of a switch-on signal of the lamp switch, outputting a turn-on signal to the second switch through a pulse width modulation method in such a manner that the lamp section is automatically turned on when the movement state detecting signal is generated, and converting an automatic mode of the lamp switch into a manual mode through a default manner if turn-on signals are continuously generated.
2. An autolights system for a vehicle, the autolights system comprising: a light-quantity detecting sensor for generating a light-quantity detecting signal by detecting quantity of light; a vehicle movement detecting section generating a movement state detecting signal by detecting a movement of the vehicle; at least two lamp power supply switches, which are switched-on so as to supply power to a lamp section; a first switch, which is switched-on when a lamp switch operated by a driver is switched-on so as to generate a lamp switch-on signal; at least two second switches, which are switched-on based on a lamp switching command signal for turning on the lamp section, the second switch transmitting the lamp switching command signal to the lamp power supply switch; a lamp switch detecting section for continuously generating switching signals so as to allow the lamp section to be maintained in a turn-on state by detecting on/off signals, which are generated after an initial on-state of the lamp switch; and a control section detecting an input of a switch-on signal of the lamp switch, outputting a turn-on signal to each of the second switches, which are connected to the lamp section, through a pulse width modulation method in such a manner that the lamp section is automatically . turned on when, the light-quantity detecting signal o the movement state detecting signal is generated, and converting an automatic mode of the lamp switch into a manual mode through a default manner if turn-on signals -are continuously generated.
3. The autolights system as claimed in claim 1 or 2, further comprising an ampere detecting section for generating a current detecting signal by detecting an amount of current generated by a resistance value of the lamp section in order to diagnose an error of the lamp section, the ampere detecting section transmitting the current detecting signal to the control section.
4. The autolights system as claimed in claim 1 or 2, further comprising a buzzer switch, which is switched on based on a buzzing sound generating signal when the lamp section is faulted, the buzzer switch transmitting the buzzing sound generating signal to the vehicle movement detecting section.
5. The autolights system as claimed in claim 1 or 2, wherein the lamp switch detecting section is provided between a power supply section and a ground and includes a charging part allowing the lamp switch detecting section to be charged with power supplied from the power supply section and a discharging part for discharging the power from the lamp switch detecting section when the lamp switch is switched-off by the driver, thereby providing a predetermined driving time of the control section.
6. An autolights system for a vehicle used for automatically turning on/off headlights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section automatically turning on/off the headlights based on the intensity of illumination detected by the light-quantity detecting sensor, and adjusting brightness of the headlights within PWM 70%; and a relay for turning on/off the.. head lights according, to a. PWM signal generated from the control section.
7. The autolights system as claimed in claim 6, further comprising a veliicle movement detecting section for generating. a movement state detecting signal in a" form of a pulse by detecting a vehicle velocity, wherein the control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlights is constantly maintained when the vehicle runs, brightness of the headlights is reduced or the headlights are turned off when the vehicle temporarily stops, and the headlights are turned off when the vehicle is in a parking state.
8 An autolights system for a vehicle used for automatically turning on/off headlights and taillights of the vehicle, the autolights system comprising: a light-quantity detecting sensor attached to a lower end of a front window of the vehicle in order to detect intensity of illumination around the vehicle; a control section for differentially turning on/off the headlights and taillights based on the intensity of illumination detected by the light-quantity detecting sensor, and for outputting a PWM signal to adjust brightness of the headlights; and first and second relays for automatically turning on/off the headlights and taillights according to the PWM signal generated from the control section.
9. The autolights system as claimed in claim 6, further comprising a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity, wherein the control section determines a running state of the vehicle based on the movement state detecting signal of the vehicle movement detecting section so as to control the headlights through a PWM control in such a manner that brightness of the headlights is constantly maintained when the vehicle runs, brightness of the headlights is reduced or the headlights are turned off when the vehicle temporarily stops, and the headlights are turned off when the vehicle is in a parking state.
10. An autolights system for a vehicle used for manually turning on/off headlights and taillights of the vehicle, the autolights system comprising: a lamp switch detecting section for detecting an operational state of the lamp switch in order to manually turning on off the headlights and the taillights; a control section for outputting a PWM signal to turn on/off the headlights and taillights based on the operational state detected by the lamp switch detecting section; and first and second relays for manually turning on/off the headlights and taillights according to the PWM signal generated from the control section.
11. The autolights system as claimed in claim 10, further comprising a vehicle movement detecting section for generating a movement state detecting signal in a form of a pulse by detecting a vehicle velocity, wherein the control section receives the movement state detecting signal from the vehicle movement detecting section and outputs the PWM signal to the first and second relays in order to compulsorily turn on/off the headlights and tail lights for a predetermined time even if an operation of an engine stops.
PCT/KR2003/002889 2003-01-02 2003-12-30 Autolights system for vehicle WO2004060716A1 (en)

Priority Applications (2)

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AU2003289571A AU2003289571A1 (en) 2003-01-02 2003-12-30 Autolights system for vehicle
JP2004564586A JP2006512250A (en) 2003-01-02 2003-12-30 Auto lamp control circuit for vehicles

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0000071 2003-01-02
KR10-2003-0000071A KR100473653B1 (en) 2003-01-02 2003-01-02 Automatic control circuit for controling lamp
KR10-2003-0082835 2003-11-21
KR1020030082835A KR20040063072A (en) 2003-11-21 2003-11-21 headlight and taillight lighting apparatus of automobile

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WO2004060716A1 true WO2004060716A1 (en) 2004-07-22

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