KR19990001646A - Switch control device of automobile headlight using microcontroller and its method - Google Patents

Abstract

Luminance sensor that detects the brightness around the vehicle and converts it into an electrical signal and outputs it, automatic mode switch for selecting auto mode or manual mode of headlight, and switching switch for switching operation state of headlight in manual mode And, when the automatic mode is selected by the automatic mode switch, the high / low state of the headlamp is switched according to the signal input from the light sensor, and when the manual mode is selected, according to the state of the switch. A microcontroller for outputting a control signal for switching the high / low state of the headlamp, a headlight driver for applying power to the headlamp according to a signal input from the microcontroller, and a signal input from the headlight driver Including the headlight to output the beam to the By using the controller to automatically switch the high beam and low beam of the headlights according to the brightness of the surroundings, the driver's watch is secured and the driver can switch between the high and low beams manually. Provided is a control device for a vehicle headlight using a microcontroller and a method thereof.

Description

Switch control device of automobile headlight using microcontroller and its method

The present invention relates to a vehicle headlight switching control device and a method using a microcontroller, and more specifically, to a driver's watch by automatically switching the high beam and the low beam of the headlight according to the ambient light using the microcontroller. The present invention relates to a control device and a method for switching a headlamp of a vehicle using a microcontroller, which can provide convenience by allowing a driver to manually switch between a high beam and a low beam.

While driving a car, an equalizer for securing a clock and an equalizer for displaying signals and signs are required. The lighting device may include headlights, fog lights, indoor lights, reversing lights, and the like. Emergency lights, turn signals, tail lights, number lights, stop lights, etc. may be used to satisfy the purpose. For this reason, the product conforming to the standard is mandatory.

The headlamp is an equalizing device for securing a driver's watch when driving at night, and includes a filament as a light source, a reflector for focusing light forward, and a lens for determining the direction and diffusion of light.

The light distribution characteristic of the beam irradiated from the headlamp is generally wide in the horizontal direction and narrow in the vertical direction. The driver uses a switching switch installed around the steering wheel according to the driving situation. High beam and low beam should be used properly. If you are driving on a secluded outer road, you can use a high beam that can illuminate far and wide around the road while traveling in the middle of the city In order to illuminate one's own driving direction with the necessary brightness, but to avoid the curtain phenomenon without glare to the driver of the ahead or opposite vehicle, use the low beam to stop temporarily due to signal waiting while driving. If it does, the headlights should be turned off at all.

However, it is very inconvenient for the driver to switch the high beam to the low beam whenever there is an oncoming road that requires a high beam, and to switch the high beam back to the high beam after the crossing. It is dangerous.

In order to improve such inconvenience and danger, the technology for automatically switching the high beam and the low beam according to whether or not the light emitted from the vehicle facing each other during the driving of the vehicle is disclosed in Korean Utility Model Registration Publication No. 87 -Automatic flashing lights for upper and lower headlights of No. 245 (Date: 11 February 1987 AD) and headlights of No. 89-379 (Date: 9 March 1989 AD) And HB and LB switching and flashing devices for main vehicles, and dimmers and parking control systems for automobile headlights of Publication No. 89-380 (published: March 9, 1989 AD).

However, the above-described conventional techniques have a problem that the circuit is complicated because the driver cannot switch manually manually because the high beam and the low beam are switched automatically, and are configured in an analog circuit manner.

An object of the present invention is to solve the conventional problems as described above, by using a microcontroller to automatically switch the high beam and low beam of the headlights according to the brightness of the surroundings to ensure the driver's watch and at the same time The present invention provides a control device and method for switching the headlights of a vehicle using a microcontroller that can be conveniently switched between the high beam and the low beam.

1 is a block diagram illustrating a configuration of a control device for switching a headlamp of a vehicle using a microcontroller according to an exemplary embodiment of the present invention.

2 is an operation flowchart of a method for controlling switching of a vehicle headlight using a microcontroller according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: light intensity sensor 20: microcontroller

30: headlight driving unit 40: headlight

HSW: Automatic mode switch SSW: Switch

As a means for achieving the above object, the configuration of the apparatus of the present invention is a light sensor that detects ambient light and converts it into an electrical signal and outputs the light, and an automatic mode for selecting an automatic mode or a manual mode of a headlamp. A switch, a switching switch for switching the operating state of the headlamp in the manual mode, and switching the high / low state of the headlamp according to the signal input from the light sensor when the automatic mode is selected by the automatic mode switch. When the manual mode is selected, the microcontroller outputs a control signal for switching the high / low state of the headlamp according to the state of the changeover switch, and the headlamp is supplied according to the signal input from the microcontroller. The headlight driving unit and the signal input from the headlight driving unit described above. Which comprises a headlight.

As a means for achieving the above object, the configuration of the method of the present invention determines whether the automatic mode switch is turned on when the operation is started, and compares the signal input from the light intensity sensor with the reference value when the automatic mode switch is turned on accordingly. And automatically switching the headlights and, if the automatic mode switch is off, manually driving the headlights according to the state of the switching switch.

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

1 is a block diagram illustrating a configuration of a control device for switching a headlamp of a vehicle using a microcontroller according to an exemplary embodiment of the present invention. As shown in FIG. 1, a configuration of a control device for switching a headlamp of a vehicle using a microcontroller according to an exemplary embodiment of the present invention includes a brightness sensor unit 10 for sensing a brightness around a vehicle, and a headlight automatic mode for driving. Automatic mode switch (HSW), switching switch (SSW) for switching the high beam and low beam in the headlight manual mode, and the output stage of the light sensor 10, the automatic mode switch (HSW) and switching switch (SSW) The input terminal is connected to the output terminal of the microcontroller 20 having an input terminal connected to the output terminal of the microcontroller 20, the headlight driving unit 30 connected to the output terminal of the microcontroller 20, and the headlight driving unit 40. Including the headlamp 40.

The microcontroller 20 uses a built-in analog to digital converter and a memory therein.

2 is an operation flowchart of a method for controlling switching of a vehicle headlight using a microcontroller according to an exemplary embodiment of the present invention. As shown in FIG. 2, the configuration of a control method of switching a headlamp of a vehicle using a microcontroller according to an exemplary embodiment of the present invention includes a step (S10) of starting operation when power is applied and a signal input from an automatic mode switch. Determining whether the automatic mode switch is turned on (S20), detecting the brightness of the surroundings of the vehicle from the signal input from the brightness sensor when the automatic mode switch is turned on (S30), and whether the ambient light is above a reference value. Determining (S40), switching the headlight to a high beam when the ambient light is above the reference value (S50), switching the headlight to the low beam when the ambient light is below the reference value (S60), and an automatic mode switch If it is off is made to include a step (S70) for driving the headlights according to the state of the switch.

The operation of the switching control device for a vehicle headlight using the microcontroller according to the embodiment of the present invention and the method by the above-described configuration are as follows.

When the power is applied, the operation procedure shown in FIG. 2, which is programmed and stored in the internal memory of the microcontroller 20, is executed by the microcontroller 20, so that the vehicle using the microcontroller according to the embodiment of the present invention. Operation of the headlight switching control device is started (S10). When the operation is started, the microcontroller 20 determines whether the automatic mode switch (HSW) is on by reading a signal input from the automatic mode switch (HSW) after initializing all memory variables (S20).

When the automatic mode switch (HSW) is turned on, the microcontroller 20 detects the brightness of the current vehicle surroundings mainly by the brightness of the front of the vehicle using the signal input from the light intensity sensor unit 10 (S30). Next, the microcontroller 20 determines whether the current ambient light is greater than or equal to the reference value (S40), and when the current ambient light is greater than or equal to the reference value, the microcontroller 20 outputs a control signal to the headlight driving unit 30 so that the headlight 40 is high beamed. If the current ambient light is less than the reference value, and the control signal is output to the headlight driving unit 30 so that the headlamp 40 is driven by a low beam (S60).

However, when the automatic mode switch (HSW) is off, the microcontroller 20 operates in the manual mode. In this case, the microcontroller 20 reads a signal input from the changeover switch (SSW), One of three modes of operation, low beam and beam off, is selected. Accordingly, the driver may manually switch the high beam or the low beam of the headlamp 40 or turn off the headlamp 40 by using the changeover switch SSW.

As described above, in the embodiment of the present invention, by using the microcontroller to automatically switch the high beam and low beam of the headlight according to the brightness of the surroundings, while ensuring the driver's field of vision, the driver also manually high beam and low beam It is possible to provide a control device and a method for switching the headlights of a vehicle using a microcontroller having an effect that can provide convenience by switching the. This effect of the present invention can be modified and used by those skilled in the art within the scope of the present invention in the field of automotive equalizers.

Claims (2)

Luminance sensor that detects the brightness around the vehicle and converts it into an electrical signal and outputs it, automatic mode switch for selecting auto mode or manual mode of headlight, and switching switch for switching operation state of headlight in manual mode And, when the automatic mode is selected by the automatic mode switch, the high / low state of the headlamp is switched according to the signal input from the light sensor, and when the manual mode is selected, according to the state of the switch. A microcontroller for outputting a control signal for switching the high / low state of the headlamp, a headlight driver for applying power to the headlamp according to a signal input from the microcontroller, and a signal input from the headlight driver Including a headlamp for outputting a beam to the Switch control device of automobile headlight using microcontroller. When the operation is started, it is determined whether the automatic mode switch is turned on, and when the automatic mode switch is turned on, the signal input from the light sensor is compared with a reference value and the headlight is automatically switched accordingly. Switching control method for a vehicle headlight using a microcontroller, characterized in that it comprises the step of manually driving the headlight according to the state of the switch.