KR20180111084A - Head lamp for vehicle - Google Patents

Abstract

The objective of the present invention is to provide a vehicle head lamp, facilitating assembly and arrangement and providing various types of light distribution patterns. To this end, the vehicle had lamp comprises: a light source unit, wherein a plurality of LED chips, capable of being turned off respectively, are arrayed; and a plurality of light source modules collecting light emitted from the LED chips so as to form temporary light distribution and outputting the light. The plurality of light source modules is disposed to irradiate light in the directions, different from each other based on a center shaft. Accordingly, an assembly and an arrangement are facilitated and various types of light distribution patterns can be provided. Moreover, a high-output head lamp can be provided by using an LED with low expenses, low power, and low luminance.

Description

HEAD LAMP FOR VEHICLE

The present invention relates to a headlamp for a vehicle, and more particularly to a headlamp for a vehicle which is easy to assemble and align and can provide various light distribution patterns.

Generally, a vehicle is equipped with a variety of vehicle lamps having a lighting function and a signal function for notifying other vehicle users or other road users of the traveling state of the vehicle so that an object located in the vicinity of the vehicle can be easily identified at night when traveling . For example, headlights and fog lights are aimed at lighting functions, and turn signal lights, taillights, brake lights, side markers and the like are intended for signal functions.

Such automotive lamps have typically used light sources such as halogen lamps or high intensity discharge (HID) lamps.

Recently, a light emitting diode (LED) has been used as a light source. The light emitting diode has a color temperature of about 5500K, which is close to solar light, which minimizes fatigue in a human eye and minimizes size, It is also economical due to its semi-permanent lifetime.

Attempts have been made to overcome the increase in the complexity of the conventional lamp configuration and fabrication steps by introducing light emitting diodes and it is possible to overcome the problem of the lamp space due to the extension of the lamp life and the small size due to the characteristics of the light emitting diode itself .

On the other hand, headlights of various vehicle lamps use various beam patterns compared to other lamps. For example, a headlight illuminates a light beam having an optimum beam pattern according to a running state of the vehicle, for example, a traveling speed, a running direction, a road surface condition, and an ambient brightness, .

Further, when a light emitting diode is used, one or more light emitting diodes are used in order to secure a sufficient amount of light while irradiating light of each beam pattern.

However, in order to irradiate beams of different beam patterns, components corresponding to the corresponding beam patterns are separately required, which increases the number of components and increases the cost and increases the space required.

Accordingly, there is a demand for a method capable of irradiating light of various beam patterns and securing a sufficient amount of light while reducing the space, the number of parts, and the cost required for irradiating light of different beam patterns.

FIG. 1 is a view showing a structure and a beam pattern of an automotive LED headlamp according to the prior art. The automotive LED headlamp includes an LED light source 10 including a plurality of LED elements 11a, 11b, 11c and 11d, And a condenser lens 20 for condensing a beam to be irradiated forward.

The LED light source 10 includes a plurality of independently operable LED elements 11a, 11b, 11c, and 11d, so that each LED element forms a beam pattern in a different region. For example, the first LED element 11a forms a first light distribution area 30a, and the second through fourth LED elements 11b, 11c, and 11d form second to fourth light distribution areas 30b and 30c , 30d can be formed.

In recent years, it has been proposed to control the light distribution pattern by controlling ON / OFF of individual LED elements. However, in the case of forming a light diffusion angle by using one lens, the light emitted from each LED element is not clearly separated, There is a problem that appropriate light distribution formation and variable light distribution are not provided since they are mixed and overlapped with each other at the boundary portion of the light distribution area of the individual LED elements.

Korean Patent Registration No. 10-1307976 (entitled " Multiple LED module and vehicle LED head lamp including the same "

In order to solve such problems, it is an object of the present invention to provide a headlamp for a vehicle which is easy to assemble and align and can provide various light distribution patterns.

According to an aspect of the present invention, there is provided an LED lighting device comprising: a light source part having a plurality of LED chips arrayed for individual lighting control; and a condenser lens for condensing light emitted from the LED chip to form arbitrary light distribution and outputting the light And the plurality of light source modules are arranged to emit light in different directions with respect to the central axis.

Further, the light source module according to the present invention may include a first light source module for emitting light in a first direction; A second light source module for irradiating light in a second direction tilted by a predetermined angle from an irradiation direction of the first light source module; And a third light source module that emits light in a third direction that is tilted by a certain angle from the irradiation direction of the first light source module.

Also, the light source module according to the present invention may be configured such that the first light source module is installed in an arbitrary direction, the second light source module is installed by tilting at a certain angle with respect to the central axis of the first light source module, And the second light source module is installed symmetrically with respect to the second light source module with respect to the central axis of the first light source module.

In the light source module according to the present invention, the first light source module is installed in an arbitrary direction, and the second light source module is tilted at one side of the first light source module at a certain angle with respect to the central axis of the first light source module And the third light source module is installed at one side of the second light source module at a predetermined angle with respect to the central axis of the first light source module.

The light source module according to the present invention may further include a first light source module, a second light source module, and a projection lens for imaging and outputting the light transmitted through the condenser lens to the third light source module.

In the light source module according to the present invention, the first light source module is installed in an arbitrary direction, and the second light source module is tilted at one side of the first light source module at a certain angle with respect to the central axis of the first light source module And the third light source module is installed at one side of the second light source module at a predetermined angle with respect to the central axis of the first light source module.

The light source module according to the present invention may include a first light source module, a second light source module, a projection lens for outputting a light image of the light transmitted through the condenser lens to the third light source module, And first and second projection lenses for outputting images so as to form a refracted angle of incidence at a predetermined angle and to form an image.

In the light source module according to the present invention, the first to third light source modules are installed in parallel, and the first light source module is provided with a projection lens for imaging and outputting the light transmitted through the condenser lens, The module is provided with a first projection lens for outputting light so that light transmitted through the condensing lens forms an image at a first angle of refraction at a certain angle with respect to the central axis of the first light source module, And a second projection lens for outputting a second image-forming angle which is a predetermined angle of refraction of the light transmitted through the first light source module with respect to the central axis of the first light source module.

The present invention is advantageous in that it is easy to assemble and align and can provide various light distribution patterns.

Further, the present invention is advantageous in that a high-output head lamp can be provided by using low-cost, low-power, low-intensity LEDs.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a structure and a beam pattern of an automotive LED headlamp according to the prior art; Fig.
2 is a block diagram showing a first embodiment of a vehicle headlamp according to the present invention.
3 is an exemplary view showing a light distribution distribution of a headlamp for a vehicle according to the present invention.
4 is a block diagram showing a second embodiment of a vehicle headlamp according to the present invention.
Fig. 5 is an exemplary view showing a light distribution distribution in a state in which one light source module is turned on in the second embodiment of the vehicle headlamp according to the present invention; Fig.
6 is a view illustrating an LED chip of the light source module of FIG.
FIG. 7 is a diagram illustrating a state in which high beam distribution is implemented using three light source modules according to FIG. 5; FIG.
8 is a block diagram showing a third embodiment of a vehicle headlamp according to the present invention.
Fig. 9 is an exemplary view showing a right side light distribution of a vehicle headlamp according to the third embodiment of Fig. 6; Fig.
Fig. 10 is an exemplary view showing a light distribution distribution on the left side of the vehicle headlamp according to the third embodiment of Fig. 6; Fig.
Fig. 11 is an exemplary view showing the overall light distribution distribution of the vehicle headlamp according to the third embodiment of Fig. 5; Fig.
12 is a block diagram showing a fourth embodiment of a vehicle headlamp according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vehicle headlamp according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

2 is a block diagram showing a first embodiment of a vehicle headlamp according to the present invention.

2, the vehicle headlamp 100 according to the first embodiment of the present invention includes a light source unit 111 in which a plurality of LED chips capable of individual lighting control are arrayed, A first light source module 110, a second light source module 110 ', and a third light source module 110 "having a condenser lens 112 for forming an arbitrary light distribution and transmitting the light, , The first light source module 110 and the second light source module 110 'and the third light source module 110' may be configured to emit light in different directions with respect to the central axis C, 110, a second light source module 110 ', and a third light source module 110 ".

In the present embodiment, a configuration including three light source modules is described as an embodiment, but the present invention is not limited thereto, and the number of light source modules can be appropriately changed.

A first LED chip 111a, a second LED chip 111b, and a third LED chip 111c that can independently control the on / off operation of the light source unit 111 independently.

In the illustrated embodiment, the configuration including three LED chips is described as an embodiment, but the present invention is not limited thereto, and the number of LED chips may be appropriately changed.

In addition, the light source unit 111 may include first to third LED chips 111a, 111b, and 111c so as to provide proper light distribution and variable light distribution without mixing and overlapping each other at the boundary portion of the light distribution region of the individual LED elements. Are spaced apart from each other in the range of 0.2 mm to 6 mm.

If the distance between the LED chips is set to 0.2 mm or less, the overlap of the emitted light occurs, and if the distance between the LED chips is set to 6 mm or more, the size of the condenser lens 112 is increased have.

Further, the distance between the LED chips is generally set to be 1 * 1 mm in the case of an LED installed in a vehicle so as to prevent interference due to the amount of light and interference due to the size, It is preferably installed at a distance of 3 mm.

The condenser lens 112 is configured to condense the light emitted from the three LED chips 111a, 111b and 111c to form an arbitrary light distribution pattern. The condenser lens 112 includes three LED chips 111a, 111b, 111c are all turned on, a light distribution pattern having a vertical angle of ± 2 ° and a horizontal angle of ± 5 ° is formed.

The light source module according to the first embodiment may include a first light source module 110 that emits light in a first direction and a second light source module 110 that emits light in a second direction that is tilted at a certain angle from the irradiation direction of the first light source module 110. [ And a third light source module 110 "for irradiating light in a third direction tilted at a predetermined angle from the irradiation direction of the first light source module 110 .

That is, for example, the light source module is installed so that the first light source module 110 can irradiate light in a forward direction (for example, 0 °), and the second light source module 110 ' And the third light source module 110 '' is installed at a predetermined angle (? 1, for example, -4.2 °) with respect to the center axis C of the module 110. The third light source module 110 ' Is tilted at a certain angle (? 2, for example, 4.2 degrees) with respect to the center axis C and installed symmetrically with the second light source module 110 '.

The light distribution pattern having a desired length is formed through the arrangement in which the first to third light source modules 110, 110 ', 110 "are connected to form a light distribution pattern uniformly distributed, for example, .

Referring to FIG. 3, the light distribution distribution formed by the right lamp 100 'and the left lamp 100 " made up of the light source module having the above-described configuration is transmitted to the right lamp 100' A light distribution distribution is formed in a range of -20 ° to 20 ° through a left side lamp 100 "and a light distribution is formed in a range of -20 ° to 5 ° in a region 101 of a central axis C, Thereby providing a central light intensity.

(Second Embodiment)

4 is a block diagram showing a second embodiment of a vehicle headlamp according to the present invention.

4, the head lamp 100a according to the second embodiment includes a light source unit 111 in which a plurality of LED chips capable of individual lighting control are arrayed, and a light source unit 111 for condensing the light emitted from the LED chip, A first light source module 110a, a second light source module 110a ', and a third light source module 110a "having a condenser lens 112 for forming a first light source module 110a, The first light source module 110a and the second light source module 110a 'and the third light source module 110a "are provided with a first light source module 110a and a second light source module 110b so as to irradiate light in different directions with respect to the center axis C, Two light source modules 110a 'and a third light source module 110a "are disposed.

The light source module according to the second embodiment includes a first light source module 110a that emits light in a first direction, a second light source module 110b that emits light in a second direction that is tilted at a certain angle from the irradiation direction of the first light source module 110a, And a third light source module 110a "for irradiating light in a third direction tilted at a predetermined angle from the irradiation direction of the first light source module 110a , The first light source module 110a is installed in a forward direction (for example, 0 °), and the second light source module 110a 'is installed at one side of the first light source module 110a, And the third light source module 110a "is installed at one side of the second light source module 110a 'at a predetermined angle θ3 with respect to the center axis C of the first light source module 110a, 4 at a certain angle? 4 with respect to the center axis C of the first and second guide grooves 110a, 110a.

That is, in the head lamp 100a according to the second embodiment, the second light source module 110a 'and the third light source module 110a' are sequentially tilted about the first light source module 110a, There is a difference from the structure of the headlamp 100 according to the embodiment.

The configuration according to the second embodiment has an advantage that a light distribution width can be further widened, and a center luminous intensity can maintain a constant luminous intensity.

In addition, the headlamp 100a according to the second embodiment is configured such that the light distribution of the first light source module 110a and the second light source module 110a 'are overlapped to increase the brightness of the intermediate region.

5, when one light source module composed of the first to third LED chips 111a, 111b and 111c is turned on, for example, the vertical angle is in the range of -2 ° to 2 °, and the horizontal angle is in the range of -5 A light distribution pattern of a rectangular shape having a range of 0 to 5 degrees is formed.

6 (a), when any LED chip among the first to third LED chips 111a, 111b, and 111c is lit, a light distribution pattern is formed for each LED chip, The first and third LED chips 111a and 111c are turned on, and when the second LED chip 111b is turned off, a light distribution pattern is formed through individual control.

7, when the first to third light source modules 100a, 100a ', and 100a "are all turned on to form a high beam pattern, the luminous intensity of the intermediate region is increased by overlapping the light distribution .

(Third Embodiment)

8 is a block diagram showing a vehicle headlamp according to a third embodiment of the present invention.

Referring to FIG. 8, the head lamp 100b according to the third embodiment includes a light source unit 111 in which a plurality of LED chips capable of individual lighting control are arrayed, a light source unit 111 for condensing light emitted from the LED chip, A first light source module 110b, a second light source module 110b ', and a third light source module 110b ", each of which has a condenser lens 112 for outputting a first light source The module 110b, the second light source module 110b 'and the third light source module 110b "are arranged in the order of the first light source module 110b and the second light source module 110b' The first light source module 110b and the third light source module 110b are arranged and the first light source module 110b, the second light source module 110b 'and the third light source module 110b' And a projection lens 113 for focusing and outputting the light transmitted through the lens 112. [

That is, the headlamp 100b according to the third embodiment has the first light source module 110b installed in the forward direction (for example, 0 °), and the second light source module 110b ' And the third light source module 110b 'is installed at one side of the second light source module 110b' at a predetermined angle? 3 with respect to the central axis C of the first light source module 110b. The tilting of the first light source module 110b with respect to the central axis C of the first light source module 110b is performed at a predetermined angle? 4 with respect to the headlamp 100a according to the second embodiment, And the projection lens 113 outputs an image of the transmitted light.

The projection lens 113 further improves the light collection efficiency of the light transmitted through the condenser lens 112 and increases the light intensity of the head lamp 100b by improving the light condensing efficiency.

The increase in the brightness of the headlamp 100b allows the use of low-power, low-cost, and low-light-emitting LED chips and dimming control, thereby reducing manufacturing costs.

9 to 11, the light distribution distribution formed by installing the head lamp 100b on the right and left sides of the vehicle allows a light distribution distribution to be formed through -5 to 20 degrees through the right head lamp, So that a light distribution distribution is formed in a range of -20 DEG to 5 DEG, and overlaps in the region of the central axis portion, thereby providing a high center luminance.

(Fourth Embodiment)

112 is a block diagram showing a fourth embodiment of a vehicle headlamp according to the present invention.

Referring to FIG. 12, the head lamp 100c according to the fourth embodiment includes a light source unit 111 in which a plurality of LED chips capable of individual lighting control are arrayed, a light source unit 111 for condensing light emitted from the LED chip, A first light source module 110c, a second light source module 110c ', and a third light source module 110c ", each of which has a condenser lens 112 for outputting the first light source 110a, The first light source module 110c and the second light source module 110c 'are arranged such that the first light source module 110c and the third light source module 110c' The first light source module 110c and the third light source module 110c are arranged and the first light source module 110c, the second light source module 110c 'and the third light source module 110c' A projection lens 113 for focusing and outputting the light transmitted through the lens 112 and a first lens 112 for outputting a light beam passing through the condenser lens 112 so as to form an image at a predetermined angle of refraction, And a projection lens 113 ', the second is constituted by adding to install the projection lens (113 ").

That is, the head lamp 100c according to the fourth embodiment has the first to third light source modules 110c, 110c 'and 110c "parallel to each other, and the first light source module 110c includes the condenser lens 112 The first light source module 110c is provided with a projection lens 113 for outputting an image of transmitted light and the second light source module 110c ' And the third light source module 110c '' is provided with a first projection lens 113 'for outputting an image to form an image at a first angle of refraction, A second projection lens 113 "for forming a second angle of refraction at a certain angle with respect to the center axis C of the first light source module 110c and outputting an image is provided, There is a difference in the configuration of the headlamp.

In the headlamp 100c according to the fourth embodiment, the first and second projection lenses 113 'and 113 "are configured such that the diffraction angles of the headlamps 100c are different in the curvature so that the diffraction angle is directed in a specific direction, So that the manufacturing process can be improved.

Accordingly, it is possible to easily assemble and align, to provide various light distribution patterns, and to provide a high output head lamp by using low cost, low power, low light LED.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intentions or customs of the user, the operator, and the interpretation of such terms should be based on the contents throughout this specification.

100, 100a, 100b, 100c: head lamp
110, 110a, 110b, 110c: a first light source module
110 '110a', 110b ', 110c': the second light source module
110 ", 110a ", 110b ", 110c ": third light source module
111: Light source
111a: first LED chip
111b: second LED chip
111c: third LED chip
112: condenser lens
113: projection lens
113 ': first projection lens
113 ": second projection lens

Claims (8)

A light source unit 111 in which a plurality of LED chips capable of individual lighting control are arrayed and a condenser lens 112 for collecting light emitted from the LED chip to form arbitrary light distribution and outputting the light, / RTI >
Wherein the plurality of light source modules are arranged to irradiate light in different directions with respect to a center axis (C). The method according to claim 1,
The light source module includes a first light source module (110, 110a, 110b, 110c) for emitting light in a first direction;
A second light source module (110 '110a', 110b ', 110c') for emitting light in a second direction tilted by a predetermined angle from the irradiation direction of the first light source module (110, 110a, 110b, 110c); And
110a ", 110b", 110c "for irradiating light in a third direction tilted by a predetermined angle from the irradiation direction of the first light source module (110, 110a, 110b, 110c) Car headlamps. 3. The method of claim 2,
The first light source module 110 is installed in an arbitrary direction and the second light source module 110 'is disposed at a certain angle? 1 with respect to the central axis C of the first light source module 110. [ And the third light source module 110 "is tilted at a certain angle θ2 with respect to the center axis C of the first light source module 110 and is tilted with respect to the second light source module 110 ' Wherein the headlamp is symmetrically installed. 3. The method of claim 2,
The first light source module 110a is installed in an arbitrary direction and the second light source module 110a 'is installed on one side of the first light source module 110a, The third light source module 110a is installed at one side of the second light source module 110a 'at a predetermined angle? 3 with respect to the center axis C of the first light source module 110a, C at a predetermined angle? 4 with respect to the center axis of the headlamp. 3. The method of claim 2,
The light source module includes a first lens unit 110b, a second light source module 110b ', and a projection lens 113 for outputting an image of light transmitted through the condenser lens 112 to the third light source module 110b' Further comprising a plurality of light emitting diodes (LEDs). 6. The method of claim 5,
The first light source module 110b is installed in an arbitrary direction and the second light source module 110b 'is installed on one side of the first light source module 110b in the center axis of the first light source module 110b, The third light source module 110b is mounted on one side of the second light source module 110b 'at a predetermined angle? 3 with respect to the center axis C of the first light source module 110b, C at a predetermined angle? 4 with respect to the center axis of the headlamp. 3. The method of claim 2,
The light source module includes a first lens unit 110c, a second light source module 110c ', and a projection lens 113 for outputting the image of the light transmitted through the condenser lens 112 to the third light source module 110c' , And first and second projection lenses (113 ', 113 ") for outputting an image so that the light transmitted through the condenser lens (112) Head lamp. 8. The method of claim 7,
The first light source module 110c, the first light source module 110c, and the first light source module 110c are disposed in parallel with each other. The first light source module 110c includes a projection lens The first light source module 110c is provided with a first light source module 110c and a second light source module 110c ' And the third light source module 110c '' is provided with a first projection lens 113 'for forming an image at a wide angle of 1x and outputting an image so that light passing through the condenser lens 112 passes through the first light source module 110c, Is provided with a second projection lens (113 ") which forms a second angle of refraction which is refracted at a certain angle with respect to the central axis (C) of the lens (C).

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