KR101726515B1

KR101726515B1 - LED head light apparatus

Info

Publication number: KR101726515B1
Application number: KR1020150135748A
Authority: KR
Inventors: 심창백; 최광호
Original assignee: 심창백
Priority date: 2015-09-24
Filing date: 2015-09-24
Publication date: 2017-04-13
Also published as: KR20170036951A

Abstract

The present invention relates to an LED headlight device.
An LED headlight device according to the present invention includes: a head having a first LED element for illuminating a low beam and a second LED element for illuminating a high beam; A middle for fixing the head to the vehicle; And a heat sink for discharging heat generated from the head to the outside, wherein the first LED element and the second LED element are positioned on different lines on a vertical axis reference perpendicular to the central axis direction of the head .

Description

LED head light apparatus

The present invention relates to an LED headlight device, and more particularly, to a bulb-type LED headlight device mounted on a vehicle for illuminating a forward direction of a vehicle.

A headlight is also called a headlamp, which illuminates the front for safe driving at night. The headlights typically include an upward light that illuminates a high beam that illuminates a long distance (about 100 meters), and a downward that illuminates a low beam that illuminates a short (about 30 meters) road.

In the prior art, a headlight device used in a vehicle mainly uses a bulb type halogen lamp as a pure type. The bulb type halogen lamp has a front filament and a rear filament. When a low beam is irradiated, a front filament is emitted. When a high beam is irradiated, a rear filament is emitted.

However, there is a problem that the halogen lamp has a short lifetime, high power consumption, and low light amount. For example, in the case of the H4 type, about 4.4A 5,300cd in the downward direction and about 5.0A 27,400cd in the upward direction, have.

On the other hand, there are HID (High Intensity Discharge) headlight devices and LED (Light Emitting Diode) headlight devices to replace halogen lamps. HID headlight units are bright, but require high voltage, have a relatively short life span, and LED headlight units are becoming popular recently because of their power efficiency and long life span.

In this regard, FIG. 1 shows a configuration of a bulb-type LED headlight device 100 according to the related art, and FIG. 2 shows an LED device 112 for a downward light and an LED device 0.0 > 114 < / RTI >

1, a conventional bulb-type LED headlight device 100 includes a head 110, a middle 120, a heat sink 130, and a power source (not shown) . For the H4 type (eg, Japanese Valenti), four 5 mm × 5 mm LED elements are used as the left and right down lights and the upward lights, respectively.

2, the LED elements for the left and right downward lights (only the LED elements 112 for the left downward light in FIG. 1 are visible) are spaced by 27.5 mm from the middle 120 in the transverse direction, The LED elements for the left and right upward lights (only the LED elements 114 for the left upward light in FIG. 1) are located 22.3 mm away from the middle 120 in the horizontal direction on the central axis of the head 110 And is positioned on the central axis of the head 110 in the longitudinal direction. The distance between the left and right LED elements, that is, the thickness of the head 110 at the portion where the left and right LED elements are mounted, is 3.6 mm.

As a result of measuring the performance of a conventional H4 type LED headlight device (for example, Valenti, Japan) using a measuring device (for example, HLI-205), two left and right LED devices for downward light When light was emitted, it was about 1.9A 22.8W 17,400cd, and about 2.5A 30.0W 30,800cd when the left and right two LED elements for the upward light were emitted.

However, although the LED headlight device according to the related art is brighter than a halogen lamp, the light amount is significantly lower than that of the HID headlight device, and the current consumption is considerably large when the LED lamp characteristics are taken into consideration. Particularly when the cut- There are two luminous points, and the luminous pattern of the left part of the cut line is spec over.

In addition, since the LED headlight device according to the related art has a high power consumption due to high power consumption, it is necessary to use a DC fan. In this case, if a noise is generated and the DC fan is not operated due to dust or the like, There is a problem that the lifetime of the LED device is adversely affected.

Korean Patent Registration No. 10-1500379

It is an object of the present invention to provide an LED headlight device capable of obtaining a maximum amount of light and improving power efficiency by optimizing a head shape and an LED element position.

It is still another object of the present invention to provide an LED headlight device capable of obtaining an optimum low beam cut line substantially equal to a conventional halogen lamp.

According to an aspect of the present invention, there is provided an LED headlight device including a head having a first LED element for emitting a low beam and a second LED element for emitting a high beam, ); A middle for fixing the head to the vehicle; And a heat sink for discharging heat generated from the head to the outside, wherein the first LED element and the second LED element are positioned on different lines on a vertical axis reference perpendicular to the central axis direction of the head .

Preferably, the first and second LED elements are in a rectangular shape and are inclined at the same predetermined angle with respect to the central axis of the head and are adjacent to each other.

Preferably, the center of the first LED element is located at a distance of 26.3 mm or more and 27.3 mm or less in the direction of the central axis of the head from the middle, and the center of the second LED element is located in the center axis direction And spaced apart by 22.5 mm or more and 23.5 mm or less. The center of the first LED element is located on the center axis of the head, and the center of the second LED element is located 2 mm or more and 3 mm or less from the central axis of the head.

Preferably, the head cap further includes a head cap provided at an upper end of the head to block a low beam irradiated by the first LED element. The head cap is formed asymmetrically in a left portion and a right portion, The LED element is shadowed by 20%.

Preferably, the thickness of the head at the portion where the left and right LED elements are mounted is 1 mm.

According to the present invention, it is possible to obtain the maximum amount of light and improve the power efficiency by optimizing the head shape and the position of the LED element in the LED headlight device.

According to the present invention, by forming the head cap shape asymmetrically, it is possible to obtain an optimum low beam cut line substantially equal to that of the pure halogen lamp.

1 is a block diagram of a conventional bulb-type LED headlight device.
FIG. 2 shows details of the LED device for downward light and the LED device for the upward light shown in FIG.
FIG. 3 shows the result of measurement of the light amount and the cut line according to the distance where the upstream LED element is located apart from the middle in the horizontal axis direction.
FIG. 4 shows the result of measurement of the light amount and the cut line according to the distance where the downward-lighted LED element is located apart from the middle in the horizontal axis direction.
5 shows the result of measurement of the amount of light and the cut line by the distance where the LED element is located away from the head central axis in the vertical axis direction.
FIG. 6 shows the results of measurement of the light amount and the cut line according to the head thickness at the portion where the left and right LED elements are mounted.
FIG. 7 shows the result of measurement of light amount and cut line by position of the head cap.
8 is a configuration diagram of a bulb-type LED headlight device according to an embodiment of the present invention.
9 is an exploded perspective view of a bulb type LED headlight device according to an embodiment of the present invention.
FIG. 10 shows the detailed arrangement of the LED elements for the downward light and the LED for the upward light shown in FIG.
11 (a) is a perspective view, 11 (b) is a left side view, 11 (c) is a plan view, 11 (d) is a right side view, and 11 e) is a front view.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention unnecessarily obscure.

The present inventor has experimented with finding the optimum position by measuring the light quantity and cut line according to the position of the LED element in the H4 type LED headlight device using the 5mm x 5mm LED device in order to obtain the optimum light quantity and the cut line.

First, FIG. 3 shows the results of measurement of the amount of light and the cut line according to distances where the LED elements are spaced away from the middle in the horizontal direction.

3, the measuring model is DHL-40W-H4, the measuring vehicle is SUZUKI swift, the measuring device is HLI-205, the LED device is CREE XM-L2, the power specification is DC 12V to 24V, The device's longitudinal axis position is 2.697 mm below the head center axis. The head thickness is 1mm and the head cap is 20% shadow state of the LED element such as the left downward.

FIG. 4 shows the result of measurement of the light amount and the cut line according to the distance where the downside LED element is located apart from the middle in the horizontal axis direction.

4, the measuring model is DHL-40W-H4, the measuring vehicle is SUZUKI swift, the measuring device is HLI-205, the LED device is CREE XM-L2, the power source specification is DC 12V to 24V, The device's longitudinal axis position is 2.697 mm below the head center axis. The head thickness is 1mm and the head cap is 20% shadow state of the LED element such as the left downward.

5 shows the result of measurement of the amount of light and the cut line by the distance where the LED element is located away from the head central axis in the vertical axis direction.

5, the measurement model is DHL-40W-H4, the measurement vehicle is SUZUKI Swift, the measurement device is HLI-205, the LED device is CREE XM-L2, the power source specification is DC 12V to 24V, , The distance between the middle and upper LED elements is 22.3 mm, the head thickness is 1 mm, and the head cap is 20% shadow state of the LED elements such as the left downward.

FIG. 6 shows the results of measurement of the light amount and the cut line according to the head thickness at the portion where the left and right LED elements are mounted.

6, the measurement model is DHL-40W-H4, the measurement vehicle is SUZUKI Swift, the measurement device is HLI-205, the LED device is CREE XM-L2, the power source specification is DC 12V to 24V, The distance between the middle and the upward LED element is 22.3 mm, the vertical axis position of the LED element is 2.697 mm downward from the center axis of the head, and the head cap is 20% shadowed state of the LED element such as the downward left LED.

FIG. 7 shows the result of measurement of light amount and cut line by position of the head cap.

7, the measurement model is DHL-40W-H4, the measurement vehicle is SUZUKI swift, the measurement device is HLI-205, the LED device is CREE XM-L2, the power source specification is DC 12V to 24V, The distance between the middle and the downward LED element is 27.0 mm, and the vertical axis position of the LED element such as downward is the center axis of the head, and the head thickness is 1 mm.

Analysis of the above measurement results confirmed that the LED devices for the left and right upward lights exhibited better performance when positioned farther away from the middle than 22.3 mm (which corresponds to the prior art), whereas in the prior art, And the LED element for the downward light is located side by side on the center axis of the head, the LED element for the upside light is positioned more than 22.3 mm from the middle. Therefore, the LED element for the downward light due to the size of the LED element of 5 mm x 5 mm The LED device for downward light was 27.5 mm away from the middle and the LED device for the upside was 22.3 mm away from the middle.

Accordingly, the present inventor studied a method of optimally arranging two LED elements for a downward light and an upward light by using a 5 mm × 5 mm LED element and adjacently located within 5 mm on a horizontal axis basis. As a result, two 5 mm × 5 mm LEDs A bulb type LED headlight device has been invented in which an element can be inclined to obtain an optimal amount of light and power efficiency as follows.

FIG. 8 is a configuration diagram of a bulb-type LED headlight device 200 according to an embodiment of the present invention, and FIG. 9 is an exploded perspective view of a bulb-type LED headlight device 200 according to an embodiment of the present invention. 10 shows the detailed arrangement of the LED element 212 for the downward light and the LED element 214 for the upward light shown in FIG.

8 and 9, a bulb-type LED headlight device 200 according to an embodiment of the present invention includes a head 210, a middle 220, a heat sink 230, , And a power supply unit (not shown). In case of the H4 type, four 5 mm × 5 mm LED elements are used as the left and right downward lights and the upward lights, respectively.

10, the 5 mm × 5 mm LED elements 212 and 214 for the left and right downward lights and the upward light are disposed on the same line (center axis of the head) Unlike the technique (see FIG. 2), they are located on different lines but are located as close as possible to the longitudinal axis. That is, the two 5 mm × 5 mm LED elements 212 and 214 are rotated at the same angle to each other to be disposed as close as possible to each other to form an inclination angle. Thus, the center of the LED element 212 for downward light, The distance between the centers of the LED elements 214 is less than 5 mm.

In particular, according to a preferred embodiment of the present invention, the LED elements for the left and right downward lights (only the LED element 212 for the left downward light in FIG. 8) mm, preferably 27.0 mm, and is located on the central axis of the head 210 in the longitudinal direction. (Only the LED element 214 for the left upward light is visible in the LED elements for the left and right upward lights) is 22.5 mm or more and 23.5 mm or more from the middle 220 in the transverse direction, preferably 23.0 mm And is located 2.0 mm to 3.0 mm down from the central axis of the head 110 in the longitudinal axis direction, preferably 2.7 mm, more preferably 2.697 mm apart. The distance between the left and right LED elements, that is, the thickness of the head 210 at the portion where the left and right LED elements are mounted, is 1 mm.

11 (a) is a perspective view, 11 (b) is a left side view, 11 (c) is a plan view, and 11 (d) is a right side view. FIG. 11 is a perspective view of a head cap according to an embodiment of the present invention. 11 (e) is a front view.

Referring to FIG. 11, a head cap 216 according to an embodiment of the present invention includes a semi-circular light blocking portion disposed under the central axis of the head, and the light blocking portion includes an LED The left-side LED element is formed to shade 20% from the bottom with respect to the element, and the right-side LED element is not shaded. As such, the left and right portions are formed asymmetrically, so that an optimum low beam cut line substantially equal to that of the pure halogen lamp can be obtained.

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 in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that the embodiments are to be considered in all respects as illustrative and not restrictive.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

100, 200: LED headlight device 110, 210: head
112, 212: Downward light LED element 114, 214: Upward light LED element
116, 216: head cap 120, 220: middle
130, and 230: a heat sink

Claims

In an LED headlight device,
A head having a first LED element for illuminating a low beam and a second LED element for illuminating a high beam;
A middle for fixing the head to the vehicle;
A heat sink for discharging heat generated in the head to the outside; And
And a head cap provided at an upper end of the head to block a low beam irradiated by the first LED element,
Wherein the first LED element and the second LED element are rectangular in shape and are disposed adjacent to each other with inclination at a predetermined angle with respect to the central axis of the head on different lines on a vertical axis reference perpendicular to the central axis direction of the head ,
Wherein the center of the first LED element is located at a distance of 26.3 mm or more and 27.3 mm or less in the central axis direction of the head from the middle, mm or less,
The center of the first LED element is located on the center axis of the head, the center of the second LED element is located 2 mm or more and 3 mm or less from the central axis of the head,
The left and right portions of the head cap are asymmetrically formed to shade the left LED element by 20%
And the thickness of the head at the portion where the left and right LED elements are mounted is 1 mm.

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