KR20190067615A - Apparatus for controlling automotive head lamp - Google Patents

Abstract

The present invention relates to a vehicle headlamp control device and, more specifically, to a vehicle headlamp control device capable of correcting a deviation between modules and driving the module according to a predetermined standard while simultaneously controlling a plurality of LED modules having different illuminance characteristics by one headlamp control device. The vehicle headlamp control device for controlling a plurality of LED modules according to the present invention comprises: a power supply unit having a common power supply terminal and supplying power for driving all of the plurality of LED modules through the common power supply terminal; and a control unit for adjusting the illuminance of light emitted from each of the LED modules through pulse width modulation (PWM) control on each LED module of the plurality of LED modules.

Description

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a headlamp controller for a vehicle, and more particularly, to a headlamp controller for a vehicle, which simultaneously controls a plurality of LED modules having different illuminance characteristics, such as different illumination characteristics, And more particularly, to a headlamp control apparatus for a vehicle which can drive the headlamps together.

Generally, an automobile equalizer is used as a lighting function for viewing an object and as an indication, a signal, a warning function, and a decoration function for informing another automobile or other road user of the running state of the automobile.

In particular, the head lamp is installed on both sides along the width of the front portion so as to secure the visibility of the driver when driving at night while receiving electricity through the wiring connected to the battery of the vehicle. Conventionally, a bulb is used as a light source in a head lamp, but a bulb has a short life span and a low impact resistance. Thus, a light emitting diode (LED) having a long service life and excellent impact resistance , LED) as a light source.

In addition, in recent years, in consideration of the functionality of the headlamp as well as the design, the number of headlamps including the high beam and the low beam as well as a plurality of light emitting modules is increasing. For example, FIG. 1 shows a case where a headlamp is constructed by using three LED assembly modules (LAMs).

However, since the headlamps are related to the safety of automobiles, the headlamps must meet the standards according to the relevant regulations such as illumination, etc. However, due to technical limitations in the manufacturing process, the LED modules may have different illuminance levels, It is necessary to correct deviations in illuminance characteristics and the like between the LED modules to meet the specifications required for the headlamps.

Accordingly, conventionally, after attaching the measured illuminance information to each LED module using a bar code or a label, the operator can directly check the bar code or the like in the assembly step and attach a lens or the like capable of correcting the illuminance difference The deviation of illuminance between the LED modules is compensated to meet the standards required by the relevant laws and regulations.

However, in such a case, the operator must individually check the barcode attached to the LED module and attach the lens or the like to the LED module. Therefore, the assembly process is very troublesome and the productivity may be greatly deteriorated. Also, .

Further, the LED headlight is provided with an LED driver module (LDM) as shown in FIG. 2 to drive the LED module. However, since the illuminating characteristics of the LED module may be different from each other, It is difficult to simultaneously control a plurality of LED modules in the port. Accordingly, in order to individually control the plurality of LED modules, an LED driving module or a plurality of LED driving modules having a plurality of control ports must be used. The complexity increases and the manufacturing cost of the product increases.

Korean Patent No. 10-0798143

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle head lamp capable of correcting a deviation between modules while simultaneously controlling a plurality of LED modules having different illuminance characteristics, And to provide a control device.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to another aspect of the present invention, there is provided a vehicular headlamp control apparatus for controlling a plurality of LED modules, the vehicular headlamp control apparatus comprising: A power supply for supplying power for the power supply; And a controller for controlling light intensity of light emitted from the LED modules through pulse width modulation (PWM) control for the LED modules of the plurality of LED modules.

At this time, the power supply unit supplies DC power through the common power supply terminal, and in the control unit, DC power applied to each LED module according to a pulse width modulation control signal for each LED module is bypassed ).

Further, the control unit may include a plurality of switches corresponding to the plurality of LED modules, turn on a switch corresponding to each of the LED modules with a pulse width modulation control signal for each of the LED modules, The DC power applied to each LED module can be controlled to be bypassed.

In addition, the controller may control a duty of a pulse width modulation control signal for each of the LED modules to control the intensity of light emitted from the LED modules.

In addition, the plurality of LED modules may include N LED modules, where N is a positive constant greater than 1, the input terminal of the first LED module being electrically connected to the common power terminal, The output terminal of the module is electrically connected to the input terminal of the second LED module, and the output terminal of the n-th LED module is electrically connected to the input terminal of the nth LED module, where 1 < Structure.

In this case, the control unit may include a plurality of bypass circuits corresponding to the LED modules, and a power source applied to the (n-1) -th LED module according to the pulse width modulation control signal may be connected to the And may be controlled to be applied to the nth LED module by being bypassed by the corresponding (n-1) th bypass circuit.

Furthermore, the input terminal and the output terminal of the n-th LED module may be electrically connected to the input terminal and the output terminal of the n-th bypass circuit, respectively.

The control unit may include a microcontroller unit (MCU) block for generating a pulse width modulation control signal for each of the LED modules, and a controller for controlling the brightness of light emitted from the LED modules using the pulse width modulation control signal. LED module control block &lt; / RTI &gt;

Also, the controller may recognize brightness characteristics stored in advance in each of the LED modules, and then control brightness of light emitted from the LED modules in consideration of illuminance characteristics of the LED modules.

At this time, each of the LED modules has a resistance corresponding to its own illuminance characteristic, and the controller can recognize the illuminance characteristic of the LED module using the resistor.

Further, each of the LED modules is provided with a negative temperature coefficient (NTC) resistance, and the controller can recognize the illuminance characteristic of the LED module and the temperature of the LED module together.

Further, the headlamp apparatus according to another aspect of the present invention may be configured to include the vehicle headlamp controller described above.

In the headlamp controller for a vehicle according to an embodiment of the present invention, a power supply for driving all of a plurality of LED modules is supplied from one common power supply terminal, and pulse width modulation A plurality of LED modules having different illuminance characteristics are simultaneously controlled by one vehicle headlamp control device by adjusting the illuminance of light emitted from each of the LED modules through Width Modulation So that it can be driven in accordance with a predetermined standard.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a view illustrating a headlamp including a plurality of LED modules according to the related art.
2 is an exemplary diagram of an LED driving module according to the related art.
3 is a configuration diagram of a headlamp controller for a vehicle according to an embodiment of the present invention.
4 is a detailed block diagram of a vehicular headlamp control apparatus according to an embodiment of the present invention.
5 is a view for explaining the structure and operation of an LED module and an LED module control block according to an embodiment of the present invention.
6 is a diagram illustrating a specific configuration of a power supply unit according to an embodiment of the present invention.
7A and 7B illustrate a specific configuration of a control unit according to an embodiment of the present invention.
8 is a photograph illustrating the operation of the headlamp apparatus according to an embodiment of the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the scope of the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that it is replaced with a technical term that can be understood by a person skilled in the art. In addition, the general terms used in the present invention should be interpreted according to a predefined or prior context, and should not be construed as being excessively reduced.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as "comprising" or "comprising" and the like should not be construed as encompassing various elements or various steps of the invention, Or may further include additional components or steps.

Furthermore, terms including ordinals such as first, second, etc. used in the present invention can be used to describe elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals denote like or similar elements, and redundant description thereof will be omitted.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the understanding of the technical idea of the present invention, and the technical idea of the present invention should not be interpreted as being limited by the attached drawings.

Hereinafter, exemplary embodiments of a vehicle headlamp control apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram illustrating a vehicular headlamp control apparatus 100 according to an embodiment of the present invention. 3, the headlamp controller 100 for a vehicle according to an embodiment of the present invention includes a common power supply terminal 111, A power supply unit 110 for supplying power for driving all of the plurality of LED modules 200 through the plurality of LED modules 200 and a plurality of LED modules 200a, 200b, 200n of the plurality of LED modules 200, And a controller 120 for adjusting the illuminance of light emitted from each of the LED modules 200a, 200b and 200n through pulse width modulation (PWM) control.

The controller 120 includes an MCU (Micro Controller Unit) block 121 for generating pulse width modulation control signals for the LED modules 200a, 200b and 200n, And an LED module control block 122 for adjusting the brightness of light emitted from the LED modules 200a, 200b, and 200n.

Accordingly, in the vehicular headlamp control apparatus 100 according to the embodiment of the present invention, while supplying power for driving all of the plurality of LED modules 200 from one common power supply terminal 111, 200b and 200n by controlling the pulse width modulation of each of the LED modules 200a, 200b and 200n of the module 200 to control the intensity of light emitted from the LED modules 200a, 200b and 200n, The headlamp controller 100 controls the plurality of LED modules 200 having different illuminance characteristics at the same time and corrects deviations between the modules so that a predetermined standard (for example, regulations on the illuminance of the headlamp) As shown in FIG.

4 illustrates a specific block diagram of a vehicular headlamp control apparatus 100 according to an embodiment of the present invention. 4, the vehicle headlamp includes three LED modules 200 - a first LED module 200a for a first downward light LOW1, a second LED for a second downlight LOW2, Module 200b and a third LED module 2000c for the HIGH light. 4, the vehicle headlamp controller 100 according to an embodiment of the present invention controls three LED modules 200a, 200b and 200c, but the present invention is not limited thereto , And the case of controlling two LED modules 200 or controlling the four or more LED modules 200 may all be included.

4, the vehicle headlamp control apparatus 100 according to an embodiment of the present invention includes a power supply unit 110 and is connected to the three LEDs 110 through a common power supply terminal 111. [ And supplies power for driving all of the modules 200a, 200b, and 200c.

4, the power supply unit 110 may convert a power source for driving the LED module 200 from an input power source by using a DC-DC converter or the like. have.

The power supply unit 110 may include an ESD protection circuit, a negative voltage protection circuit, an input noise filter circuit, an over-voltage protection circuit, a voltage protection circuit, and an output filter circuit.

The headlamp controller 100 for a vehicle according to an embodiment of the present invention includes a control unit 120 to control the pulse widths of the LED modules 200a, 200b, and 200c of the plurality of LED modules 200, 200b, and 200c, respectively, by controlling the modulation (pulse width modulation) of the light emitted from the LED modules 200a, 200b, and 200c.

The control unit 120 may further include an MCU (Micro Controller Unit) block 121 for generating pulse width modulation control signals for the LED modules 200a, 200b and 200c, And an LED module control block 122 for adjusting brightness of light emitted from the LED modules 200a, 200b, and 200n.

Referring to FIGS. 3 and 4, the vehicle headlamp control apparatus 100 according to an embodiment of the present invention is divided into the respective components and examined in more detail.

First, the power supply unit 110 supplies power for driving all of the plurality of LED modules 200 through the common power supply terminal 111. Accordingly, the plurality of LED modules 200 are connected to the common power supply terminal 111 to receive power. Further, in the vehicle headlamp controller 100 according to the embodiment of the present invention, the power supply unit 110 The power supply for driving all of the plurality of LED modules 200 can be supplied through the common power supply terminal 111 and driven.

3 and 4, the plurality of LED modules 200 may be connected to the common power terminal 111 through a series connection structure. In this case, as shown in FIGS. 3 and 4, have.

More specifically, when N LED modules 200 are included as the plurality of LED modules 200 (where N is a positive constant greater than 1), the input terminals of the first LED module 200a are connected to the common And an output terminal of the first LED module 200a is electrically connected to an input terminal of the second LED module 200b. The n-1th LED module 200n-1 is electrically connected to the power terminal 111, The output terminal of the n-th LED module 200n may be electrically connected to the input terminal of the n-th LED module 200n (1 < n &lt; N).

However, the present invention is not limited thereto. The plurality of LED modules 200 may have a parallel connection structure in which input terminals of the LED modules are connected to each other and output terminals of the LED modules are connected to each other. And may be connected to the power supply terminal 111. Further, the serial connection structure and the parallel connection structure may be used together.

The LED module 200 may include one or more LED devices. When a plurality of LED devices are included, as shown in FIG. 4, a plurality of LED devices are connected in series, (200).

However, the present invention is not limited thereto. The LED module 200 may have a structure in which a plurality of LED devices are connected in parallel, and further, the serial connection structure and the parallel connection structure are used together, .

At this time, the power supply unit 110 can supply DC power to the plurality of LED modules 200 through the common power supply terminal 111. Since the LED device is operated by a DC power source, the common power source terminal 111 can supply and drive a proper DC power to the plurality of LED modules 200.

The controller 120 controls the LED modules 200a, 200b, and 200n by controlling pulse width modulation on the LED modules 200a, 200b, and 200n of the plurality of LED modules 200, And 200n, respectively.

3 and 4, the control unit 120 includes a micro controller unit (MCU) block (not shown) for generating pulse width modulation control signals for the LED modules 200a, 200b, and 200n And an LED module control block 122 for controlling brightness of light emitted from each of the LED modules 200a, 200b and 200n using the pulse width modulation control signal.

The control unit 120 controls the duty of the pulse width modulation control signals for the LED modules 200a, 200b and 200n so that light emitted from the LED modules 200a, 200b, And the like.

3 and 4, the power supply unit 110 supplies DC power to the plurality of LED modules 200 through the common power supply terminal 111. At this time, 120 controls the DC power applied to the LED modules 200a, 200b, 200n to be bypassed according to the pulse width modulation control signals for the LED modules 200a, 200b, 200n, The illuminance of light emitted from each of the LED modules 200a, 200b and 200n can be controlled.

Further, the control unit 120 may include a plurality of switches corresponding to the plurality of LED modules 200, so that the LED modules 200a, 200b, and 200n are controlled by the pulse width modulation control signals for the LED modules 200a, 200b, 200b and 200n so that the DC power applied to each of the LED modules 200a, 200b and 200n is bypassed so that each of the LED modules 200a, 200b and 200n is turned on, 200a, 200b, and 200n, respectively.

In the control unit 110 according to an embodiment of the present invention, the MCU block 121 may include a micom or a central processing unit (CPU), and the LED modules 200a, 200b, 0.0 &gt; 200n. &Lt; / RTI &gt;

Further, the MCU block 121 recognizes the illuminance characteristics stored in advance in each of the LED modules 200a, 200b, and 200n, and then, considering the illuminance characteristics of the LED modules 200a, 200b, and 200n, The brightness of light emitted from the modules 200a, 200b, and 200n may be controlled.

The LED modules 200a, 200b, and 200n may include resistors 220 corresponding to their own illuminance characteristics. Accordingly, in the MCU block 121, the LED modules 200a, 200b, 200b and 200n using the resistance 220 of the LED modules 200a, 200b, and 200n and controlling the brightness of light emitted from the LED modules 200a, 200b, and 200n You may.

The MCU block 121 recognizes the temperature of each of the LED modules 200a, 200b and 200n and then controls the temperature of each of the LED modules 200a, 200b and 200n, , 200b, and 200n may be controlled.

More specifically, for example, a negative temperature coefficient (NTC) resistance 220 may be provided in each of the LED modules 200a, 200b, and 200n. Accordingly, in the MCU block 121, 200b, and 200n of the LED modules 200a, 200b, and 200n, and may control the brightness of light emitted from the LED modules 200a, 200b, and 200n.

In addition, the MCU block 121 recognizes both the illuminance characteristics and the temperatures of the LED modules 200a, 200b, and 200n, and then determines illuminance characteristics and temperature states of the LED modules 200a, 200b, and 200n The brightness of light emitted from each of the LED modules 200a, 200b, and 200n may be controlled in consideration of the brightness of the LED module.

Particularly, the MCU block 121 uses the NTC (Negative Temperature Coefficient) resistance 220 provided in each of the LED modules 200a, 200b, and 200n to adjust the illuminance of the LED modules 200a, 200b, The characteristics and temperature can be recognized together. In this case, the illuminance characteristic and the temperature state of the LED module 200 can be simultaneously recognized using only one NTC resistor and one sensing port. However, the present invention is not limited thereto. The LED modules 200a, 200b, and 200n are individually provided with a resistor 220 for recognizing illuminance characteristics and an NTC resistor 220 for recognizing a temperature state .

In the headlamp controller 100 for a vehicle according to an embodiment of the present invention, the power supply unit 110 may include a common power supply terminal 111 for driving all of the plurality of LED modules 220 The controller 120 recognizes illuminance characteristics and temperature states of the LED modules 200a, 200b and 200n in the MCU block 121 and supplies the LED modules 200a, 200b, 200b and 200n by controlling the intensity of light emitted from each of the LED modules 200a, 200b and 200n through pulse width modulation control on the light emitting diodes 200a to 200n, A plurality of LED modules 200 having the same characteristics can be simultaneously controlled while correcting deviations between the modules so as to be driven in accordance with a predetermined standard.

5, the process of controlling the LED module 200 by the LED module control block 122 of the control unit 120 in the vehicle headlamp controller 100 according to the embodiment of the present invention will be described in detail. I look in detail.

As described above, in the present invention, N LED modules 200 may be used as the plurality of LED modules 200 (where N is a positive constant greater than 1), and as shown in FIG. 5, The input terminal of the first LED module 200a may be electrically connected to the common power terminal 111 of the power supply unit 110 and the output terminal of the first LED module 200a may be electrically connected to the second LED module 200b. And the output terminal of the n-1th LED module 200n-1 is electrically connected to the input terminal of the nth LED module 200n, where 1 < n &lt; N, A connection structure can be established.

5, the LED module 200 may include an LED array 210 in which a plurality of LED elements are arranged. Accordingly, the first LED module 200a may include a first LED module 200a, The second LED module 200b may be configured to include the second LED array 210b and the third LED module 200c may be configured to include the third LED array 210c ). &Lt; / RTI &gt; 5, the LED array 210 may have a structure in which a plurality of LED elements are connected in series, but in addition, the plurality of LED elements may be connected in parallel, or a serial connection and a parallel connection may be used together Structure.

The control unit 120 may include a plurality of bypass circuits 122a, 122b and 122n corresponding to the LED modules 200a, 200b and 200n, 1 power supply to the (n-1) th LED module 200n-1 according to the modulation control signal is supplied to the (n-1) th bypass circuit 122n-1 corresponding to the And is controlled to be applied to the n-th LED module 200n.

5, the input terminal and the output terminal of the n-th LED module 200n are electrically connected to the input terminal and the output terminal of the n-th bypass circuit 122n, respectively When the pulse width modulation (PWM) control signal is applied to each of the bypass circuits 122a, 122b and 122n, the bypass circuits 122a, 122b and 122n perform the pulse width modulation 200b, and 200n according to the duty of the PWM control signal to adjust the illuminance of the light emitted from the LED modules 200a, 200b, and 200n .

5, the LED module control block 122 may include a plurality of switches (Q4, Q5, and Q6 in FIG. 5) corresponding to the plurality of LED modules 200 have. 5, a plurality of switches corresponding to a plurality of LED modules 200 may be formed by using an element such as a field effect transistor (FET), and the LED modules 200a, 200b, The switches corresponding to the LED modules 200a, 200b and 200n are turned on with the pulse width modulation (PWM) control signals (LOW1_PWM, LOW2_PWM and HIGH_PWM in FIG. 5) 200b and 200n are bypassed so that the illuminance of the light emitted from each of the LED modules 200a, 200b and 200n can be controlled.

Further, in generating the pulse width modulation (PWM) control signals (LOW1_PWM, LOW2_PWM, and HIGH_PWM in FIG. 5) for controlling the LED modules 200a, 200b and 200n, the MCU block 121 200b and 200n by using the resistance 220 provided in the LED modules 200a, 200b and 200n and reflects the illumination characteristics of the LED modules 200a, 200b and 200n (PWM) control signal for controlling the pulse width modulation (PWM) control signal. The MCU block 121 recognizes the temperature states of the LED modules 200a, 200b and 200n using the NTC resistance 220 provided in each of the LED modules 200a, 200b and 200n And may generate a pulse width modulation (PWM) control signal for controlling the LED modules 200a, 200b, and 200n. Further, the MCU block 121 uses the NTC resistance 220 provided in each of the LED modules 200a, 200b, and 200n to adjust the illuminance characteristics and temperature states of the LED modules 200a, 200b, and 200n, And generates a pulse width modulation (PWM) control signal for controlling the LED modules 200a, 200b, and 200n.

6 illustrates a specific configuration of the power supply unit 110 according to an embodiment of the present invention. 6, the power input block 112 in the power supply unit 110 includes an ESD protection circuit for blocking an impact caused by external static electricity, and a negative voltage protection circuit. Circuits, and the like. 6, in the power input block 112 according to the embodiment of the present invention, the FETs (Q1 and Q3 in FIG. 6) are used to bypass the current according to the load, Circuit may be constituted.

Also, as shown in FIG. 6, the power supply unit 110 according to an embodiment of the present invention may include a power conversion block 113 for DC-DC conversion. 6, a buck-boost type applicable to various headlamp structures is applied to the shift source conversion block 113 according to the present invention. However, the present invention is not necessarily limited thereto, and a buck- ) Type or a boost type.

In FIG. 6, a source current is controlled by applying pulse width modulation (PWM) or analog dimming to control the overall current of a circuit in the source conversion block 113 according to the present invention So that it is possible to change the specifications easily.

7A and 7B illustrate a specific configuration of the control unit 120 according to an embodiment of the present invention.

7A, the external signal connection block 123 of the controller 120 receives external signals (for example, LOW + and HIGH + signals in FIG. 7A) such as an ECU (Electronic Control Unit) . At this time, the external signal connection block 123 intercepts noise or the like from the outside and transmits a stable signal to the MCU block 121 of the controller 120. [

Then, the MCU block 121 collects signals inputted from the outside such as an ECU of a vehicle, information on illuminance characteristics and temperature states of the plurality of LED modules 200, and reflects the information on the illuminance characteristics and temperature states of the LED modules 200a and 200b , 200n) of the pulse width modulation (PWM) control signal.

For this purpose, the MCU block 121 recognizes a signal input from the outside such as an ECU of a vehicle, an analog-digital conversion (ADC) signal of illuminance characteristics and temperature states of a plurality of LED modules 200, It is possible to configure the circuit so that it can receive input using the GPIO (General Purpose Input Output) port and recognize the minute voltage fluctuation if necessary (for example, when configuring a 10-bit ADC circuit, ). In some cases, the circuit may be configured to recognize only the HIGH / LOW of the signal.

7B, a voltage is applied to a resistor 200 and the like provided in the plurality of LED modules 200 and a voltage value measured by the resistor 200 is used for voltage division An interface circuit for recognizing the size of the resistor 200 and the illuminance characteristic of the LED module 200 according to the size of the resistor 200 is illustrated.

Accordingly, the MCU block 121 recognizes illuminance characteristics of the LED modules 200a, 200b, and 200n through the LED module connection block 124, and controls the LED modules 200a and 200b 200n, 200n so as to correct characteristic deviations of the LED modules 200a, 200b, 200n.

The MCU block 121 recognizes the temperature states of the LED modules 200a, 200b and 200n via the LED module connection block 124 and generates pulses for the LED modules 200a, 200b and 200n And simultaneously recognizes the illuminance characteristic and the temperature state of the LED module connection block 124 using the NTC resistor 220 of the LED module connection block 124, May be used to generate a pulse width modulation (PWM) control signal for each LED module 200a, 200b, 200n.

Next, FIG. 8 illustrates a photograph showing the operation of the headlamp apparatus (not shown) according to an embodiment of the present invention. The headlamp apparatus (not shown) according to an embodiment of the present invention may include the vehicle headlamp controller 100 according to an embodiment of the present invention described above.

Accordingly, in the headlamp apparatus (not shown) according to an embodiment of the present invention, while supplying power for driving all the plurality of LED modules 200 from one common power supply terminal 111, the plurality of LED modules 200 The controller controls the intensity of the light emitted from each of the LED modules 200 through the pulse width modulation control for each of the LED modules of the vehicle headlamp controller 100, It is possible to correct the deviation between the modules and to drive the LED modules 200 according to a predetermined standard.

Accordingly, in the headlamp apparatus (not shown) according to an embodiment of the present invention, as shown in FIG. 8A, the first LED module 200a corresponding to the first downward light LOW1, The third LED module 200c corresponding to the upward light HIGH is turned off while the light intensity of the second LED module 200b corresponding to the light LOW2 is corrected to be uniform.

8 (b), only the third LED module 200c corresponding to the HIGH light is turned on, and the first LED module 200c corresponding to the second LED module 200c The first LED module 200a corresponding to the first downward light LOW1 and the second LED module 200b corresponding to the second downward light LOW2 may be turned off.

8 (c), in the headlamp apparatus (not shown) according to an embodiment of the present invention, not only the third LED module 200c corresponding to the HIGH, but also the first downward light Both the first LED module 200a corresponding to the first downward light LOW1 and the second LED module 200b corresponding to the second downward light LOW2 may be turned on.

As shown in FIG. 8 (d), the headlamp apparatus (not shown) according to an embodiment of the present invention further includes a third LED module 200c corresponding to the HIGH, a first downward light The illuminance of some of the LED modules 200 may be controlled differently while both the first LED module 200a corresponding to the first downward light LOW1 and the second LED module 200b corresponding to the second downward light LOW2 are turned on (FIG. 8 (d)), the illuminance of the second LED module 200b is controlled to be weak while the illuminance of the first LED module 200a and the third LED module 200c is uniform.

Accordingly, in the headlight device (not shown) according to an embodiment of the present invention, while supplying power for driving all the plurality of LED modules 200 from one common power supply terminal 111, 200b, and 200n through pulse width modulation control on the LED modules 200a, 200b, and 200n of the respective LED modules 200a, 200b, and 200n, It is possible to simultaneously control a plurality of LED modules having different illuminance characteristics with the headlamp control device while correcting deviations between the modules so as to drive them in accordance with a predetermined standard.

The above embodiments and drawings described in this specification are merely illustrative and are not intended to limit the scope of the present invention in any way. Also, the connections or connecting members of the lines between the components shown in the figures are illustrative of functional connections and / or physical or circuit connections, which may be replaced or additionally provided by a variety of functional connections, physical Connection, or circuit connections. Also, unless explicitly mentioned, such as "essential "," importantly ", etc., it may not be a necessary component for application of the present invention.

The use of the terms "above" and similar indication words in the specification of the present invention (particularly in the claims) may refer to both singular and plural. In addition, in the present invention, when a range is described, it includes the invention to which the individual values belonging to the above range are applied (unless there is contradiction thereto), and each individual value constituting the above range is described in the detailed description of the invention The same. It is to be understood that the steps disclosed in the method inventions of the present invention are not necessarily intended to be construed as limiting the order of the steps, and the order may be appropriately changed according to necessity, have. The use of all examples or exemplary language (e.g., etc.) in this invention is for the purpose of describing the present invention only in detail and is not to be limited by the scope of the claims, It is not. It is also to be understood that a person skilled in the art will understand that various modifications, combinations, and alterations may be made depending on design criteria and elements within the scope of the appended claims or equivalents thereof.

100: vehicle headlamp controller 110: power supply unit
111: Common power terminal 112: Power input block
113: Power conversion block 120:
121: MCU block 122: LED module control block
122a: first bypass circuit 122b: second bypass circuit
122n: nth bypass circuit 123: external signal connecting block
124: LED module connection block 200: LED module
200a: first LED module 200b: second LED module
200c: Third LED module `200n: Control LED module
210: LED array 210a: first LED array
210b: second LED array 210n: nth LED array
220: Resistance

Claims (12)

A vehicle headlamp controller for controlling a plurality of LED modules,
A power supply for supplying power for driving all the plurality of LED modules through a common power supply terminal; And
A control unit for adjusting illuminance of light emitted from each of the LED modules through pulse width modulation (PWM) control on the LED modules of the plurality of LED modules;
And a control unit for controlling the head lamp. The method according to claim 1,
The power supply unit,
And supplies DC power via the common power terminal,
In the control unit,
And controls the DC power applied to the LED modules to be bypassed according to a pulse width modulation control signal for each of the LED modules. 3. The method of claim 2,
Wherein,
And a plurality of switches corresponding to the plurality of LED modules,
And a switch corresponding to each of the LED modules is turned on with a pulse width modulation control signal for each of the LED modules to control the DC power applied to the LED modules to be bypassed A headlamp controller for a vehicle. The method according to claim 1,
In the control unit,
Wherein the control unit controls the duty of a pulse width modulation control signal for each of the LED modules to control the illuminance of light emitted from the LED modules. The method according to claim 1,
Wherein the plurality of LED modules comprises N LED modules, where N is a positive constant greater than 1,
An input terminal of the first LED module is electrically connected to the common power terminal,
An output terminal of the first LED module is electrically connected to an input terminal of the second LED module,
And the output terminal of the n-1-th LED module is electrically connected to the input terminal of the n-th LED module, where 1 < n &lt; N. 6. The method of claim 5,
Wherein,
And a plurality of bypass circuits corresponding to the LED modules,
And the power supplied to the n-1th LED module is bypassed by the n-1th bypass circuit corresponding to the n-1th LED module according to the pulse width modulation control signal so as to be applied to the nth LED module. And a control unit for controlling the head lamp control unit. The method according to claim 6,
Wherein the input terminal and the output terminal of the n-
Wherein the first and second switches are electrically connected to an input terminal and an output terminal of the nth bypass circuit, respectively. The method according to claim 1,
Wherein,
An MCU (Micro Controller Unit) block for generating a pulse width modulation control signal for each LED module,
And an LED module control block for controlling brightness of light emitted from each of the LED modules using the pulse width modulation control signal. The method according to claim 1,
Wherein,
After recognizing the roughness characteristics stored in advance in each of the LED modules,
Wherein brightness of light emitted from each of the LED modules is controlled in consideration of illuminance characteristics of the LED modules. 10. The method of claim 9,
Each of the LED modules is provided with a resistance corresponding to its illuminance characteristic,
In the control unit,
And recognizes the illuminance characteristic of the LED module using the resistor. 10. The method of claim 9,
Each LED module is provided with an NTC (Negative Temperature Coefficient)
In the control unit,
Wherein the illuminance characteristic of the LED module and the temperature of the LED module are recognized together. A headlamp apparatus comprising the vehicle headlamp controller according to any one of claims 1 to 11.

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