KR20020055701A - Device for adjusting brightness of head lamp high beam - Google Patents

Abstract

PURPOSE: A device for controlling photosensitivity of head lamp upward lights is provided to control photosensitivity of the head lamp upward lights through a PWM control using an MOS-FET. CONSTITUTION: A device for controlling photosensitivity of head lamp upward lights includes a DRL unit(50). The DRL unit has a micom(52). When a switch(58) of the head lamp upward lights(60,62) is operated, a power source of a battery(54) is transmitted to the head lamp upward lights through a relay(56) of the head lamp upward lights to turn on the head lamp upward lights. The DRL unit supplies current transmitted from the battery to the head lamp upward lights through the relay of the head lamp upward lights. The micom of the DRL unit controls the supply of power source to the head lamp upward lights through a PWM control according to amplitude of signal wave using an MOS-FET.

Description

Dimming control device for headlamp uplights {DEVICE FOR ADJUSTING BRIGHTNESS OF HEAD LAMP HIGH BEAM}

The present invention relates to a dimming control device for a headlamp uplight, and more particularly, by adjusting the dimming of the headlamp uplight through PWM control using a MOS-FET, so as not to interfere with the driver of the opposing vehicle. The present invention relates to a dimming control device for a headlamp uplight, which can sensitize a headlamp even in the event of a failure.

Generally, automobiles are equipped with various lamps necessary for driving. This includes headlights that project light forward to secure a forward field of view during nighttime driving, and taillights to indicate the location of the vehicle during nighttime driving. In addition, the vehicle is further provided with front and rear poggrams used for driving in fog areas and at night light control, and reversing lamps are provided for checking the rear area when reversing.

1 shows a conventional headlamp irradiation light adjusting device. Rotating the multifunction switch SW1 turns on the headlight 10 and the taillight 20 while driving the headlight relay RY1 and the taillight relay RY2. At this time, the headlamp 10 is configured to light each of the downlight 11 and the uplight 12 by the operation of the dimmer switch (SW2), the downlight 11 is for general city driving or highway driving. Uplight 12 is used in places where street lights are not installed, such as national roads or mountain roads.

In addition, DRL (Day Time Running Light) lights up the headlights during dim dim light, snow or rain, and makes the vehicle aware of the presence of the vehicle. When it is operating, it is obliged to light a light of a specified amount of light. However, in order to realize the above situation, an up-down lamp and a circuit configuration for controlling the same are inevitable.

As a result, wiring design is complicated and a separate DRL register must be provided to realize the DRL. The additional cost of additional DRL registers can lead to increased cost. In designing a new car, the separate location of the DRL registers must be considered. On the wiring side, the addition of DRL specifications makes production and quality control difficult. When the vehicle driver turns on the headlamp high light switch, the headlamp high light may not be dimmed, which may interfere with the driver's vision.

In order to solve this problem, the Korean Utility Model Publication No. 1998-036219, filed by the applicant on December 14, 1996, and published on September 15, 1998, shows that the beam of light is irradiated in a situation where an upward lamp is irradiated. Has been disclosed to reduce the number of lamps, reduce the number of lamps, and omit additional resistors for realizing the DRL, thereby improving automobile headlight irradiation light control devices.

In this configuration, the engine detecting sensor 31 for detecting whether the vehicle engine is driven, the high light switch 32 for selecting the high beam, the low light switch 33 for selecting the low beam, and controlling the DRL And a mode switch 35 for selecting whether to drive the light blocking means while the uplight is being irradiated, and a microcomputer that determines the input signal of the switches and controls the light blocking means while the uplight is turned on. 40) and the light shielding means 100 for controlling the amount of light by shielding the irradiation surface of the upward lamp in accordance with the control signal of the microcomputer.

Here, the light shielding means 100 is a stepping motor for forward and reverse rotation according to the control signal of the microcomputer 40, the motive gear built with the stepping motor, the driven gear meshed with the motive gear, and the driven And a light shielding film wound around the roller and shielding the irradiation surface of the headlamp.

However, the headlight irradiation light adjusting device is provided with a separate mechanical shading means consisting of a plurality of gears and rollers, including a stepping motor, the structure is complicated and causes a cost increase.

The present invention for solving such a problem is to provide a dimming control device of the headlamp high-light lamp configured to control the dimming of the headlamp upward light through PWM control using the MOS-FET without using a separate DRL register or mechanical shading means The purpose is to provide.

1 is a circuit diagram showing the configuration of a conventional photosensitive control device, such as a headlamp lamp,

Figure 2 is a circuit diagram showing the configuration of the photosensitization control device for a headlamp upward lamp according to the invention.

[Explanation of symbols on the main parts of the drawings]

50: DRL unit 52: microcomputer

54: battery 56: headlamp uplight relay

58: headlamp high light switch 60, 62: headlamp high light

In accordance with an embodiment of the present invention, a photosensitive control apparatus for a headlamp uplight lamp includes a MOS headlight uplight lamp for a vehicle that is turned on by a current transmitted from a battery through a headlamp uplight relay according to an operation of the headlamp uplight switch. It is characterized in that it comprises a DRL unit with a built-in microcomputer to adjust the current supplied from the battery to the headlamp upwards by using a pulse width modulation.

Hereinafter, with reference to the accompanying Figure 2 will be described in detail with respect to the photosensitization control device for a headlamp upward lamp according to a preferred embodiment of the present invention.

Figure 2 is a circuit diagram showing the configuration of the photosensitization control device for a headlamp upward lamp according to the present invention. In order to control the dimming of the headlamp lamp by software without using the conventional DRL register or mechanical shading means, in a preferred embodiment of the present invention, a dimming control device having a configuration as shown in FIG. Illustrated.

As shown, when the headlamp high-light switch 58 is operated, the power of the battery 54 is transmitted to the left and right headlamp high-light 60, 62 via the headlamp high-light relay 56, the headlamp high-light ( Lights up 60, 62). In addition, the DRL unit 50 of the present invention is also configured to supply current transmitted from the battery 54 to the headlamp uplights 60 and 62 through the headlamp uplight relay 56.

Here, the microcomputer 52 built in the DRL unit 50 of the present invention has an amplitude of a signal wave using a MOS-FET (metal oxide semiconductor field effect transistor) whose gate is isolated by a thin silicon oxide film in the semiconductor layer. By controlling the pulse width according to the PWM (pulse width modulation) to control the power supply of the battery 54, which is transmitted to the headlamp high beam (60, 62).

In this way, the current supplied from the battery 54 to the headlamp uplights 60 and 62 can be replaced by the downlight with the dimmed uplight even when the headlamp downlight is failed by PWM control by the MOS-FET. As a result, the stability is excellent and does not disturb the driver of the opposing vehicle.

According to the present invention described above, by controlling the dimming of the headlamp uplight through PWM control using the MOS-FET without using a separate DRL register, it does not interfere with the driver of the opposing vehicle, failing downlight In addition, the headlamp can be reduced to increase convenience. In addition, since it is not necessary to provide a conventional DRL register or mechanical photosensitive means, it is possible to reduce the design line and to reduce the weight of the electrical equipment.

Claims (1)

In the headlamp high light of the vehicle which is lit by the current transmitted from the battery through the headlamp high light relay in accordance with the operation of the headlight high light switch, And a DRL unit having a built-in microcomputer for controlling the current supplied from the battery to the headlamp upward lamp by using a MOS-FET through pulse width modulation.