KR102483571B1 - Vehicle lamp - Google Patents

Abstract

A vehicle lamp is disclosed. a first light source; a second light source unit provided in a direction facing the first light source unit; a shield unit provided in a light propagation direction of the first light source unit and the second light source unit; and an aspherical lens condensing light of the first light source unit and the second light source unit that are not blocked by the shield unit, wherein a matrix beam pattern is implemented by the first light source unit and low light is generated by the second light source unit. A beam pattern may be implemented.

Description

Vehicle lamp {Vehicle lamp}

The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp implementing a matrix beam and a low beam.

Conventional vehicle lamps use general bulbs to provide lighting at night, but recently, light emitting diodes (LEDs), which are semi-permanent and have excellent lighting capabilities, are used instead of bulbs, and a lighting method using multiple optical modules is used. this is increasing

These conventional vehicle lamps generally include a plurality of optical modules such as an LED light source, a reflector, a shield, and an aspheric lens, and transmit light generated from an LED light source to a vehicle through a reflector, a shield, and an aspheric lens. By properly irradiating the front area to implement a low beam, high beam or matrix beam, the visibility of the front area of the vehicle has been improved.

On the other hand, in order to simultaneously implement a low beam and a matrix beam, an optical module for implementing a low beam and an optical module for implementing a matrix beam have been applied to conventional vehicle lamps, respectively, but this is a plurality of optical modules for simultaneous implementation of a low beam and a matrix beam When applied to the vehicle lamp, there is a problem of increasing the number of parts of the vehicle lamp and complicating the manufacturing process.

Therefore, the present invention has been devised in view of the above circumstances, in order to prevent an increase in the number of parts of a vehicle lamp and to simplify the manufacturing process, a plurality of light sources for realizing different light patterns are the same shield unit and An object of the present invention is to provide a vehicle lamp capable of realizing a low beam pattern and a matrix beam pattern while sharing an aspherical lens.

A vehicle lamp according to an embodiment of the present invention for achieving the above object includes a first light source unit; a second light source unit provided in a direction facing the first light source unit; a shield unit provided in a light propagation direction of the first light source unit and the second light source unit; and an aspherical lens condensing light of the first light source unit and the second light source unit that are not blocked by the shield unit, wherein a matrix beam pattern is implemented by the first light source unit and low light is generated by the second light source unit. A beam pattern may be implemented.

Further comprising a heat sink having a vertical member and a horizontal member extending vertically from the vertical member, wherein the first light source unit is mounted on a lower end of the horizontal member, and the second light source unit is mounted on an upper end of the horizontal member. can

The first light source unit includes a first PCB equipped with a plurality of LEDs and mounted on a lower end of the horizontal member; and a first reflector unit reflecting light from each of the LEDs.

Each of the LEDs may implement a convex trajectory in the direction of the heat sink.

The first reflector unit may include an upper reflector having a plurality of reflective surfaces for diffusing the light of the LED; and a lower reflector having a plurality of reflective surfaces condensing the light of the LED.

The height of the upper reflector may range from 1 mm to 3.5 mm. A width of each of the reflective surface of the upper reflector and the reflective surface of the lower reflector may range from 6 mm to 7 mm.

The second light source unit includes a second PCB having an LED chip and mounted on an upper end of the horizontal member; and a second reflector unit that reflects the light of the LED chip.

The shield part may have a rear end that is dug inward to become a focal point of the first light source unit and the second light source unit.

The shield part may have a flat upper end and a lower end that is cut inward to have an angle of 5 degrees to 15 degrees relative to the upper end.

Therefore, according to the vehicle lamp according to an embodiment of the present invention, the first and second light source units for realizing different light patterns share the same shield unit and aspheric lens, and a low beam pattern and a matrix beam pattern are implemented. .

In addition, as a low beam pattern and a matrix beam pattern are implemented without adding a separate optical system component, the number of components is minimized and there is an effect of preventing a cost increase due to an increase in the number of components.

1 is a perspective view of a vehicle lamp according to an embodiment of the present invention.
2 is a partial perspective view of a vehicle lamp according to an embodiment of the present invention.
3 is a perspective view of a first reflector unit according to an embodiment of the present invention.
4 is a perspective view of a shield unit according to an embodiment of the present invention.
5 is a diagram illustrating a low beam pattern and a matrix beam pattern according to an embodiment of the present invention.
6 is a diagram illustrating various matrix beam patterns according to an embodiment of the present invention.
7 is a diagram illustrating a light distribution pattern on the paper according to an embodiment of the present invention.
8 is a diagram showing the brightness of light per distance of the vehicle lamp 100 according to an embodiment of the present invention.

In order to fully understand the present invention and the advantages in operation of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in many different forms, and is not limited to the examples described. In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

Throughout the specification, when a part "includes" a certain component, it means that it may further include other components, not excluding other components unless otherwise stated.

Referring to FIG. 1 , a vehicle lamp 100 according to an embodiment of the present invention includes a heat sink 110, a first light source unit 120, a second light source unit 130, a shield unit 140, and an aspherical lens 150. ) and a fan 160, and the first light source unit 120 and the second light source unit 130 provided above and below the heat sink 110 share the shield unit 140 and the aspheric lens 150 in common. When available, a matrix beam pattern is implemented by the first light source unit 120 and a low beam pattern is implemented by the second light source unit 130 .

The heat sink 110 is for cooling the heat of the first light source unit 120 and the second light source unit 130, and may include a vertical member 111 and a horizontal member 113.

The vertical member 111 and the horizontal member 113 may be formed of a material having excellent thermal conductivity. One side of the vertical member 111 may be provided with a heat dissipation wing for rapidly cooling the heat of the first light source unit 120 and the second light source unit 130 . A fan 160 may be provided on the other side of the vertical member 111 to more rapidly cool the heat of the first light source unit 120 and the second light source unit 130 .

Also, the horizontal member 113 may be formed to extend vertically from one side of the vertical member 111 . The first light source unit 120 may be mounted at the lower end of the horizontal member 113 and the second light source unit 130 may be mounted at the upper end of the horizontal member 113 .

Referring to FIGS. 1 and 2 , the first light source unit 120 is for realizing a matrix beam pattern and may include a first printed circuit board (PCB) 121 and a first reflector unit 123 .

The first PCB 121 may be mounted on the lower end of the horizontal member 113 of the heat sink 110 . The first PCB 121 may have a horizontal length of 70 mm, a vertical length of 18 mm, and a height of 1 mm, but is not limited thereto. A plurality of LEDs 121a may be provided on the first PCB 121 .

The plurality of LEDs 121a can be individually turned on and off. This enables implementation of various matrix beam patterns. The plurality of LEDs 121a may be, for example, 12, but is not limited thereto.

Meanwhile, separate lenses may be further provided in front of each of the LEDs 121a. This can improve light efficiency of the LED 121a.

The first reflector unit 123 reflects light output from the plurality of LEDs 121a provided on the first PCB 121, and may be provided at the lower end of the horizontal member 113 of the heat sink 110.

Referring to FIGS. 1 to 3 , the first reflector unit 123 may include an upper reflector 123a and a lower reflector 123b. The upper reflector 123a may serve to diffuse the light of the LED 121a, and the lower reflector 123b may serve to condense the light of the LED 121a. The upper reflector 123a and the lower reflector 123b may include a plurality of reflective surfaces.

The overall widths of the upper reflector 123a and the lower reflector 123b are the same, the height W1 of the upper reflector 123a may be 1 mm to 3.5 mm, and the overall heights of the upper reflector 123a and the lower reflector may be within 40 mm. can be

The width W2 of each of the reflective surface of the upper reflector 123a and the reflective surface of the lower reflector 123b may be 6 mm to 7 mm, and the reflective surface of the left and right ends of the upper reflector 123a and the left and right sides of the lower reflector 123b may be A width W3 of each of the reflective surfaces at the end portion may be within 5.5 mm. The size of the upper reflector 123a and the lower reflector 123b is such that each of the upper reflector 123a and the lower reflector 123b has maximum reflection efficiency.

The upper reflector 123a and the lower reflector 123b may have curvatures within 70θ at the center, and the curvature decreases from the center to the left and right, so that the light is diffused well when the LED 121a reflects light, and the matrix beam It is possible to minimize light distribution unevenness in the matrix beam pattern by overlapping the light in a predetermined region of the pattern.

Referring back to FIG. 1 , the second light source unit 130 is for realizing a low beam pattern and may include a second PCB 131 and a second reflector unit 133 .

The second PCB 131 may be mounted on top of the horizontal member 113 of the heat sink 110 . An LED chip in which a plurality of LEDs are combined may be provided on the second PCB 131 .

The second reflector unit 133 may reflect the light of the LED chip provided on the second PCB 131 . The second reflector unit 133 may include a reflective surface having a reflection angle capable of reflecting the light of the LED chip below the cut-off line (c) (see FIG. 5).

Referring to FIGS. 2 and 4 , the shield unit 140 is provided in the light propagation direction of the first light source unit 120 and the second light source unit 130, so that the first light source unit 120 and the second light source unit 130 By blocking part of the light, a matrix beam pattern and a low beam pattern can be implemented. The shield unit 140 may be connected to the second reflector unit 133 of the second light source unit 130 or fixed by an external fixing member.

The shield unit 140 may be formed in a specific shape so that a matrix beam pattern and a low beam pattern are implemented simultaneously. The shield unit 140 may have a shape in which the rear end B is dug inward and becomes concave so as to be a focal point of the first light source unit 120 and the second light source unit 130 .

The trajectory of the rear end B of the shield unit 140 may be implemented according to Equation 1, which is an elliptic equation.

<Equation 1>

x ² /50 ² + y ² /22.5 ² =1

In Equation 1, x represents the horizontal axis and y represents the vertical axis. The rear end (B) of the shield part 140 that satisfies Equation 1 makes optimal optical characteristics appear.

The shield unit 140 may have a shape in which an upper end is flat and a lower end (L) is dug inward and becomes concave. The lower end (L) of the shield part 140 preferably has an angle of 5 degrees to 15 degrees relative to the upper end of the shield part 140 . The shape of the shield unit 140 can simultaneously improve mechanical strength and light efficiency.

In addition, a sense of disconnection between the matrix beam pattern and the low beam pattern may be removed by allowing some of the light from the second light source unit passing through the lower end L of the shield unit 140 to be provided to the cut-off line.

Meanwhile, the position of the LED 121a of the first light source unit 121 and the shape of the first reflector unit 123 may be determined based on the elliptic equation of Equation 1 that determines the shape of the rear end of the shield unit 140 .

First, the curvature of the upper end of the upper reflector 123a of the first reflector unit 123 may be determined according to Equation 2 below based on the elliptic equation of Equation 1.

<Equation 2>

y = 0.0079x2 - 0.0038x - 0.1161

In Equation 2, y represents the vertical axis and x represents the horizontal axis.

An upper end of the upper reflector 123a according to Equation 2 may have a convex trajectory toward the heat sink 110 .

Also, the plurality of LEDs 121a of the first light source unit 121 are positioned on the first PCB 121 according to Equation 3 below.

<Equation 3>

y = 0.0091x2 - 0.0057x - 0.1128

In Equation 3, y represents the vertical axis of the first PCB 121, and x represents the horizontal axis of the first PCB 121. Here, when the plurality of LEDs 121a are positioned on the first PCB 121 according to Equation 3, a convex trajectory toward the heat sink 110 is implemented.

In FIG. 2 , the distance S1 between the first reflector unit 123 and the plurality of LEDs 121a may be 6 mm to 8 mm, and the distance between the plurality of LEDs 121a and the rear end B of the shield unit 140 may be 6 mm to 8 mm. The distance S2 may be 30 mm to 50 mm. This is to achieve optimum light efficiency.

Referring back to FIG. 1 , the aspheric lens 150 condenses the light of the first light source unit 120 and the second light source unit 130 that are not blocked by the shield unit 140, and may have, for example, a 70θ curvature. . The light of the first light source unit 120 and the second light source unit 130 passing through the aspherical lens 150 finally implements a matrix beam pattern and a low beam pattern.

Referring to FIG. 5 , a matrix beam pattern MP and a low beam pattern LP implemented by the vehicle lamp 100 according to an embodiment of the present invention can be confirmed. Figure 5 (a) shows the case where light is not transmitted to the cut-off line (c) between the matrix beam pattern MP and the low beam pattern LP, and Figure 5 (b) shows the matrix beam pattern ( It is shown that the sense of disconnection is removed by transmitting light to the cut-off line (c) between the MP) and the low beam pattern LP.

As shown in (b) of FIG. 5, the sense of disconnection between the matrix beam pattern MP and the low beam pattern LP is removed because of the shape of the lower end L of the shield unit 140 (see FIGS. 2 and 4) as described above. is possible by

Referring to FIG. 6 , it can be seen that various matrix beam patterns are implemented by the vehicle lamp 100 according to an embodiment of the present invention. 6 (a) to (e) show matrix beam patterns that appear when the LEDs 121a of the first light source unit 121 are selectively turned on.

Referring to FIG. 7 , it can be seen that a light distribution pattern is implemented on the ground by the vehicle lamp 100 according to an embodiment of the present invention. In FIG. 7 , isoray lines connecting points receiving light of the same intensity in the light distribution pattern can also be confirmed.

Referring to FIG. 8, the central axis (V_Line) of the vehicle lamp 100 according to an embodiment of the present invention, the left axis (V_left_5m) deviated 5 m to the left from the central axis, and the right axis (V_Right_5m) deviated 5 m to the right from the central axis. It is possible to check the brightness of the light per distance to .

Therefore, in the vehicle lamp 100 according to an embodiment of the present invention, the first and second light source units 120 and 130 for realizing different light patterns share the same shield unit 140 and the aspherical lens 150, while , so that a low beam pattern and a matrix beam pattern are implemented.

This implements a low beam pattern and a matrix beam pattern without adding a separate optical system component, and has an effect of minimizing the number of components and preventing an increase in cost due to an increase in the number of components.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

100: vehicle lamp
110: heat sink
111: vertical member
113: horizontal member
120: first light source
121: first PCB
121a: a plurality of LEDs
123: first reflector unit
123a upper reflector
123b lower reflector
130: second light source
131: second PCB
133: second reflector unit
140: shield part
L: bottom
B: rear end
150: aspherical lens
160: fan

Claims (10)

a first light source;
a second light source unit provided in a direction facing the first light source unit;
a shield unit provided in a light propagation direction of the first light source unit and the second light source unit; and
An aspherical lens for condensing light of the first light source unit and the second light source unit that is not blocked by the shield unit; includes,
A matrix beam pattern is implemented by the first light source unit and a low beam pattern is implemented by the second light source unit;
The first light source unit,
A first PCB equipped with a plurality of LEDs; and
A first reflector unit for reflecting the light of each of the LEDs;
The first reflector unit,
an upper reflector having a plurality of reflective surfaces for diffusing the light of the LED; and
A vehicle lamp comprising a lower reflector having a plurality of reflective surfaces condensing the light of the LED. According to claim 1,
Further comprising a heat sink having a vertical member and a horizontal member extending vertically from the vertical member,
The first light source unit is mounted on the lower end of the horizontal member,
The second light source unit is a vehicle lamp, characterized in that mounted on the upper end of the horizontal member. According to claim 2,
The first PCB is a vehicle lamp, characterized in that mounted on the lower end of the horizontal member. According to claim 2,
A vehicle lamp, characterized in that each of the LEDs implements a convex trajectory in the direction of the heat sink. delete According to claim 1,
A vehicle lamp, characterized in that the height of the upper reflector is 1mm to 3.5mm. According to claim 1,
The reflective surface of the upper reflector and the reflective surface of the lower reflector each have a width of 6 mm to 7 mm. According to claim 2,
The second light source unit,
a second PCB equipped with an LED chip and mounted on top of the horizontal member; and
a second reflector unit reflecting the light of the LED chip;
A vehicle lamp comprising a According to claim 1,
The shield part is a vehicle lamp, characterized in that the rear end is dug inward to be concave so that the first light source unit and the second light source unit become focal points. According to claim 1,
The shield portion is a vehicle lamp, characterized in that the upper end is flat, the lower end is dug inward and has an angle of 5 to 15 degrees relative to the upper end.

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