JP7044657B2 - LED bulb and LED bulb unit - Google Patents

Description

The present invention relates to LED bulbs and LED bulb units used in vehicle headlights.

Conventionally, various vehicle headlights using LEDs as a light source have been proposed. For example, the headlight disclosed in Patent Document 1 includes a heat conductive rod, a pair of printed wiring boards provided on both sides of the heat conductive rod, and a heat radiating pedestal provided with a large number of heat radiating fins. LEDs for low beam and high beam are mounted on the printed wiring board, and the heat generated from the LEDs is transferred to the heat dissipation pedestal and radiated from the heat dissipation fins.

In addition, the color temperature of light that is easy to see differs depending on the weather conditions and the like. For example, when the color temperature of light is low, the visibility in the vicinity is good, but the light does not reach far and the field of view is narrowed. On the contrary, if the color temperature of the light is high, the field of view is whitened out and the perspective is lost. Furthermore, in bad weather, light with a high color temperature does not penetrate rain or the like and the field of view is extremely narrowed. In this regard, the vehicle head lamp system disclosed in Patent Document 2 includes a plurality of LED units having different color temperatures, and by changing the brightness ratio between the LED units to mix light rays having different color temperatures, a desired color is obtained. It is producing a ray of temperature.

Further, the vehicle lighting device disclosed in Patent Document 3 includes a bulb as a light emitting source, a bulb hood covering the tip of the bulb, and a reflector, and the bulb and the bulb hood are fixed to the reflector. By providing a bulb hood, direct light from the bulb is prevented from being radiated forward, and the appearance of the vehicle lighting device is improved.

Further, in recent years, it has been required to block a part of light to form a low beam having a cut-off line upward. This cut-off line is not horizontal, and by making it a line that goes up to the left in countries that pass on the left side of the vehicle (a line that goes up to the right in countries that pass on the right side of the vehicle), it is not dazzling to oncoming vehicles and the sidewalk side can be seen to the front. ing. If the driver can see the sidewalk side to the front, the driver can quickly recognize the existence of the pedestrian, which leads to the improvement of the safety of the pedestrian.

Japanese Unexamined Patent Publication No. 2016-81687 Japanese Unexamined Patent Publication No. 2013-140724 Japanese Unexamined Patent Publication No. 2013-65444

LEDs are sensitive to heat and need to be cooled, but conventional cooling methods have not been efficient. Further, in the method of generating light rays having a color temperature set by changing the luminance ratio of a plurality of LED units as in Cited Document 2, there is a problem that the light emission control is complicated and the headlight becomes expensive. rice field. Furthermore, some vehicle models do not have a valve hood, and there was a request to retrofit a valve hood. Further, in the conventional headlights for vehicles, a method of illuminating the sidewalk side in a wider range than the oncoming lane side by using a low beam having a cut-off line is adopted, but the brightness has not been considered.

Therefore, an object of the present invention is to provide an LED bulb capable of effectively cooling an LED.

Another object of the present invention is to provide an LED bulb unit capable of irradiating a light beam that is easy to see with a simpler configuration.

Another object of the present invention is to provide an LED bulb capable of preventing direct light from the bulb from being irradiated forward.

The LED valve according to one aspect of the present invention is used in a vehicle headlight, and includes a first LED substrate, a second LED substrate, a support for supporting the first LED substrate and the second LED substrate, and the like. The first LED substrate includes a first light source that emits light for irradiating the oncoming lane side, and a first printed wiring board on which the first light source is mounted, and the first light source is at least. The second LED board has one LED, and the second LED board has a second light source that emits light for irradiating the side surface side, and a second printed wiring board on which the second light source is mounted. The two light sources have at least one LED, and the brightness of the second light source is higher than the brightness of the first light source.

The LED valve according to another aspect of the present invention is an LED valve used in a vehicle headlight, and is a support that supports a first LED substrate, a second LED substrate, the first LED substrate, and the second LED substrate. The first LED substrate includes a first light source that emits light for irradiating the oncoming lane side, and a first printed wiring board on which the first light source is mounted. Includes a first low beam light source and a first high beam light source, wherein the second LED substrate includes a second light source that emits light for illuminating the sidewalk side, a second printed wiring board on which the second light source is mounted, and the like. The second light source includes a second low beam light source and a second high beam light source, and the support has a predetermined length in the first direction and is predetermined in a second direction perpendicular to the first direction. It has a height and has an opposite lower end and an upper end in the second direction, and the distance from the lower end to the second high beam light source in the second direction is from the lower end to the first high beam light source. Longer than the distance.

The LED valve according to another aspect of the present invention is an LED valve used in a vehicle headlight, and is a support that supports a first LED substrate, a second LED substrate, the first LED substrate, and the second LED substrate. The first LED substrate includes a first light source that emits light for irradiating the oncoming lane side, and a first printed wiring board on which the first light source is mounted. Includes a first high beam light source, the second LED substrate comprises a second light source that emits light for illuminating the sidewalk side, and a second printed wiring board on which the second light source is mounted. The two light sources include a second high beam light source, and the first high beam light source and the second high beam light source each have a plurality of LEDs arranged in two dimensions.

The LED valve according to another aspect of the present invention is an LED valve used in a vehicle headlight, and is a support that supports a first LED substrate, a second LED substrate, the first LED substrate, and the second LED substrate. And a protective means made of a light transmissive material mounted on the support and covering the first LED substrate and the second LED substrate, the first LED substrate emits light for illuminating the oncoming lane side. It has a first light source and a first printed wiring board on which the first light source is mounted, the first light source has at least one LED, and the second LED board illuminates the side surface side. It has a second light source that emits the light of the above, and a second printed wiring board on which the second light source is mounted, and the second light source has at least one LED.

The LED bulb according to another aspect of the present invention is used in a vehicle headlight, and includes a printed wiring board, at least one LED mounted on the printed wiring board, and the printed wiring board. The support is provided with a support and a blower fan for generating an air flow, the support is provided with a duct, and the air flow generated by the blower fan is the airflow generated by the blower fan through the duct to the at least one LED. Is sprayed on.

The support has a base body and a substrate retainer, the first printed wiring board is sandwiched between the base body and the substrate retainer, and the first light source is provided on the support. It is preferable that the duct is exposed through the window portion and communicates with the window portion.

The LED valve unit according to one aspect of the present invention is used in a vehicle headlight, includes an LED valve and a drive circuit connected to the LED valve, and the LED valve is a printed wiring. The board comprises a low beam light source and a high beam light source mounted on the printed wiring board, the low beam light source has at least one white LED, and the high beam light source has at least one light bulb color LED. When the drive circuit receives a low beam signal, it turns on only the low beam light source, and when it receives a high beam signal, it turns on the low beam light source and the high beam light source.

The LED valve according to still another aspect of the present invention is used in a vehicle headlight, and includes a printed wiring board, at least one LED mounted on the printed wiring board, and the printed wiring board. A support that supports the support and a valve hood that is detachably attached to the tip of the support, the valve hood shields a part of the light emitted from the LED, and is from the LED. Prevents direct light from shining forward.

According to the LED valve according to one aspect of the present invention, the brightness of the second light source that emits light for illuminating the sidewalk side is higher than the brightness of the first light source that emits light for illuminating the oncoming lane side. , It is not dazzling to oncoming vehicles, and the sidewalk side can be illuminated more brightly, which can improve the safety of pedestrians.

According to the LED valve according to another aspect of the present invention, the distance from the lower end of the support to the second high beam light source is longer than the distance from the lower end to the first high beam light source, that is, the height of the second high beam light source. Since the vertical position is higher than the height position of the first high beam light source, the side of the sidewalk can be illuminated farther.

According to the LED valve according to the other aspect of the present invention, since the first high beam light source and the second high beam light source each have a plurality of LEDs arranged in two dimensions, as compared with the case where they are arranged linearly. , The central area can be illuminated more brightly, and visibility can be improved.

According to the LED bulb according to another aspect of the present invention, the protective means made of a light transmissive material mounted on the support and covering the first LED substrate and the second LED substrate is provided, so that the user accidentally touches the LED. It is possible to prevent foreign matter from adhering to the LED.

According to the LED bulb according to the other aspect of the present invention, the support is provided with a duct, and the airflow generated by the blower fan is blown to the LED through the duct provided on the support. Can be cooled effectively.

According to the LED valve unit according to one aspect of the present invention, when the drive circuit receives the high beam signal, the drive circuit has a low beam light source having at least one white LED and the high beam light source having at least one light bulb color LED. Is lit, so that the visibility on snowy roads and rainy weather can be improved not only when irradiating only with white light but also when irradiating only with light bulb color light.

According to the LED bulb according to still another aspect of the present invention, since the bulb hood is detachably attached to the tip of the support, the LED can be used even when used in a vehicle not equipped with the bulb hood. It is possible to prevent the direct light of the light from being irradiated forward.

FIG. 3 is a cross-sectional view of a vehicle headlight having an LED bulb unit according to the first embodiment of the present invention. The perspective view of the LED bulb which the LED bulb unit shown in FIG. 1 has. The side view of the LED bulb shown in FIG. An exploded perspective view of the LED bulb shown in FIG. 2. An exploded perspective view of the LED bulb shown in FIG. 2. FIG. 3A is a sectional view taken along line VI-VI. (A) is a sectional view taken along line VIIa-VIIa of FIG. 2A, and FIG. 2B is a sectional view taken along line VIIb-VIIb of FIG. 2A. The block diagram of the drive circuit included in the LED bulb unit shown in FIG. (A) is a left side view of the LED bulb included in the LED bulb unit according to the second embodiment of the present invention, and (b) is a view in which the protective member is omitted from (a). (A) is a right side view of the LED bulb shown in FIG. 9, and (b) is a view in which the protective member is omitted from (a). FIG. 9 is a perspective view of the LED bulb shown in FIG. FIG. 9 is an exploded perspective view of a main part of the LED bulb shown in FIG. FIG. 9 is an exploded perspective view of a main part showing a modified example of the LED bulb shown in FIG. FIG. 9 is an exploded perspective view of a main part showing another modification of the LED bulb shown in FIG.

[First Embodiment]

Hereinafter, the LDE valve unit according to the first embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the LED bulb unit 100 of the present embodiment is adopted for the vehicle headlight H, and is a drive circuit electrically connected to the LED bulb 1 and the LED bulb 1 by wiring A. 13 and. The vehicle headlight H has a bowl-shaped reflector R and a lens portion L that covers the front of the reflector R, and the LED bulb 1 is attached to the reflector R for use. In the following description, front, rear, left, right, top, and bottom mean front, rear, left, right, top, and bottom as seen from the driver of the vehicle, but the longitudinal direction D1 of the LED valve 1 and The width direction D2 does not necessarily have to be parallel to the front-rear direction and the left-right direction as seen from the driver, and the longitudinal direction D1 and the width direction D2 may be inclined with respect to the front-rear direction and the left-right direction, respectively.

As shown in FIG. 2, the LED bulb 1 includes a bulb body 2, a heat radiation pedestal 3 connected to the bulb body 2, a blower fan F mounted on the heat radiation pedestal 3, and a mounting bracket mounted on the bulb body 2. 11 and a valve hood 12 attached to the tip of the valve body 2. The bulb body 2 includes a first LED substrate 4, a second LED substrate 5, and a support 6 that supports the first and second LED substrates 4, 5. Note that the mounting bracket 11 is omitted in FIGS. 6 and 7.

As shown in FIGS. 3A and 4, the first LED board 4 includes a first printed wiring board 41, a first low beam light source 42 and a first high beam light source 43 mounted on the first printed wiring board 41. Has. The first low beam light source 42 is composed of three white LEDs 10A arranged along the longitudinal direction D1 of the LED bulb 1, and the first high beam light source 43 is located behind the first low beam light source 42 along the longitudinal direction D1. It consists of three light source color LEDs 10B arranged.

The second LED board 5 is electrically connected to the first LED board 4 by a crossover line 38, and as shown in FIGS. 3B and 5, the second printed wiring board 51 and the second printed wiring board 51 are connected to the second printed wiring board 51. It has a mounted second low beam light source 52 and a second high beam light source 53. The second low beam light source 52 is composed of six white LEDs 10A arranged along the longitudinal direction D1, and the second high beam light source 53 is arranged along the longitudinal direction D1 at a position behind the second low beam light source 52. It consists of 10 light source color LEDs. That is, the second low beam light source 52 has more white LEDs 10A than the first low beam light source 42, and the brightness of the entire second low beam light source 52 is set higher than the brightness of the entire first low beam light source 42.

In the present embodiment, the color temperature of the light beam emitted from the white LED 10A is 4500K to 6500K, and the color temperature of the light beam emitted from the light bulb color LED 10B is 2700K to 3500K. Further, the first low beam light source 42 and the first high beam light source 43 form the first light source, and the second low beam light source 52 and the second high beam light source 53 form the second light source.

Here, the light emitted from the first LED substrate 4 is reflected by the reflector R and then passes through the lens portion L to illuminate the oncoming lane side, and the light emitted from the second LED substrate 5 is reflected by the reflector R. Later, it passes through the lens portion L and illuminates the sidewalk side. That is, in the case of Japan traveling on the left side of the vehicle, the first LED board 4 is the support 6 so that the light from the first LED board 4 illuminates the right side in the traveling direction and the light from the second LED board 5 illuminates the left side in the traveling direction. On the left side, the second LED substrate 5 is mounted on the right side of the support 6. On the other hand, for other countries traveling on the right side of the vehicle, the first LED board 4 is on the right side of the support 6 so that the light from the first LED board 4 illuminates the left side in the traveling direction and the light from the second LED board 5 illuminates the right side in the traveling direction. The second LED substrate 5 is mounted on the left side of the support 6. The attached figure illustrates the case of traffic on the left side of the vehicle.

As shown in FIG. 2, a window portion S1 for exposing the first low beam light source 42 and the first high beam light source 43 of the first LED substrate 4 is provided on one side of the support 6, and the other surface of the support 6 is provided with a window portion S1. A window portion S2 for exposing the second low beam light source 52 and the second high beam light source 53 of the second LED substrate 5 is provided.

More specifically, as shown in FIG. 4, the support 6 has a support base 7 provided with a hollow male screw portion 71 at the rear end, and a pair of substrate holders 8 and 9, and the LED bulb 1 has. In the width direction D2, the corresponding LED boards 4 and 5 are supported so as to be sandwiched between the support base 7 and the board holders 8 and 9. In the present embodiment, the notches 8a and 9a provided in the substrate retainers 8 and 9 function as the window portions S1 and S2, respectively.

Further, as shown in FIGS. 6 and 7, a pair of ducts 6A and 6B extending in the longitudinal direction D1 are provided on both sides of the support 6 in the width direction D2. Each duct 6A, 6B communicates with the corresponding window portions S1 and S2 in the front, and communicates with the internal space S3 of the male screw portion 71 via the communication hole S4 in the rear. The front portions 6a and 6b of the ducts 6A and 6B are inclined downward toward the corresponding light sources 42, 43, 52 and 53 and extend downward, and the airflow from the blower fan F flows through the ducts 6A and 6B. , Light sources 42, 43, 52, 53 (that is, LEDs 10A, 10B) are configured to be directly sprayed.

More specifically, with reference to FIGS. 4 and 5, the support base 7 has the above-mentioned male screw portion 71 and the main body portion 72 integrally formed with the male screw portion 71, and the main body portion 72 has a second body portion 72. Board mounting surfaces 72a and 72b for mounting the first and second LED boards 4 and 5 are provided, and the upper end of the main body 72 extends in the longitudinal direction D1 and protrudes outward from the board mounting surfaces 72a and 72b in the width direction D2. An extension 72c is provided. The posterior portion 72d of the extending portion 72c is wider in the width direction D2 than the anterior portion 72e.

Duct defining portions 8b and 9b are provided at positions behind the cutout portions 8a and 9a of the substrate retainers 8 and 9. The rear portion of each duct defining portion 8b, 9b has an L-shaped vertical cross section and extends along the longitudinal direction D1, and the front portion thereof has a substantially U-shaped vertical cross section to the light sources 42, 43, 52, 53. It slopes downward and extends toward the front. Further, as shown in FIGS. 6 and 7, a communication hole S4 that communicates with the internal space S3 of the male screw portion 71 and penetrates the main body portion 72 in the width direction D2 is provided at the rear portion of the main body portion 72.

When the LED boards 4 and 5 and the board holders 8 and 9 are attached to the support base 7 as required, a pair of ducts 6A and 6B is defined. That is, one duct 6A is defined by the extension portion 72c of the support base 7, the first LED substrate 4, and the duct defining portion 8b of the substrate retainer 8, and the extension portion 72c of the support base 7, the second LED substrate 5, and the substrate are defined. The other duct 6B is defined by the duct defining portion 9b of the retainer 9, and the pair of ducts 6A and 6B defined in this way communicate with the internal space S3 of the male screw portion 71 through the communication hole S4. Further, the openings on both sides of the communication hole S4 in the width direction D2 are closed by the substrate retainers 8 and 9.

As shown in FIGS. 2 and 3, the substrate retainers 8 and 9 are provided with light-shielding plates 8c and 9c extending upward from the lower edges of the cutouts 8a and 9a toward the outside of D2 in the width direction. Has been done. In the longitudinal direction D1, each of the shading plates 8c and 9c has a length dimension corresponding to the corresponding low beam light sources 42 and 52, and blocks the downward light emitted from the corresponding low beam light sources 42 and 52.

The heat radiation pedestal 3 is a hollow member, and as shown in FIG. 4, has a female screw portion 31 screwed into the male screw portion 71 and a heat radiation portion 32 integrally formed with the female screw portion 31. On the outer peripheral surface of the heat radiating portion 32, a large number of heat radiating fins 32a extending in the longitudinal direction D1 are arranged side by side in the circumferential direction. The blower fan F is housed and held in the heat radiating unit 32, and generates an air flow toward the front.

The mounting bracket 11 is a member for mounting the LED bulb 1 on the reflector R, and is externally fitted to the bulb body 2. The valve hood 12 is detachably attached to the front end of the support 6 of the valve body 2 and covers the front end of the valve body 2. The method of attaching the valve hood 12 to the support 6 is not limited, but in the example shown in FIG. 4, the female thread portion 6a is provided at the tip of the support 6, and the through hole 12a provided in the center of the valve hood 12 is provided. A mounting screw (not shown) inserted into the female screw portion 6a is screwed into the female screw portion 6a for mounting. The valve hood 12 has a cap-shaped shape that expands in diameter toward the rear, and its maximum diameter is set to be larger than the maximum diameter of the valve body 2. By providing such a valve hood 12, the valve body is provided. It is possible to prevent the direct light from 2 from being irradiated forward and to improve the appearance of the vehicle headlight H.

With reference to FIG. 8, the drive circuit 13 turns on / or the first and second low beam light sources 42, 52 and / or the first and second high beam light sources 43 in response to an input signal from an external switch (not shown). It includes a current control circuit 13a that performs off control and current control according to an input signal, and a switching circuit 13b that switches an output destination according to a current from the current control circuit 13a.

In the present embodiment, when a low beam signal is input from an external switch, the current control circuit 13a outputs the first current to the switching circuit 13b, and the switching circuit 13b is the first and second low beam light sources 42, 52 (that is, white). Only LED10A) is turned on. As a result, the light from the first low beam light source 42 is reflected by the reflector R to illuminate the oncoming lane side, and the light from the second low beam light source 52 is reflected by the reflector R to illuminate the sidewalk side. At this time, a light distribution pattern having a cut-off line is formed at the upper end portion by the action of the light-shielding plate 8c, the reflector R, and the lens portion L. Here, since the brightness of the second low beam light source 52 is set higher than the brightness of the first low beam light source 42, the brightness on the sidewalk side is higher than that on the oncoming lane side, and the sidewalk does not induce dazzling of the oncoming vehicle. You can illuminate the side brighter. This can improve the safety of pedestrians and further emphasize the cut-off line.

On the other hand, when the high beam signal is input from the external switch, the current control circuit 13a outputs the second current to the switching circuit 13b, and the switching circuit 13b is the first and first in addition to the first and second low beam light sources 42 and 52. 2 The high beam light sources 43 and 53 (that is, the white LED 10A and the light bulb color LED 10B) are turned on. As a result, white light from the low beam light sources 42 and 52 and light bulb color light from the high beam light sources 43 and 53 are irradiated. By irradiating the white light and the light bulb color at the same time in this way, it is possible to effectively prevent the occurrence of halation not only when irradiating only the white light but also when irradiating only with the light bulb color light. It can improve the visibility on the road and in rainy weather.

Here, heat is generated when the LEDs 10A and 10B are turned on, but the heat generated from the LEDs 10A and 10B is transmitted to the heat radiating pedestal 3 via the support 6 and radiated through the heat radiating fins 32a. Further, an air flow is generated by driving the blower fan F, and this air flow flows into the ducts 6A and 6B through the internal space S3 of the heat radiation pedestal 3 and the communication hole S4 of the support 6, and the first and second LED substrates 4 and It flows along 5 and flows into the headlight chamber S from the front ends of the ducts 6A and 6B. The airflow flowing into the headlight chamber S in this way is directly blown to the LEDs 10A and 10B to effectively cool the LEDs 10A and 10B.

Further, the air that has flowed into the headlight chamber S in this way and is blown onto the LEDs 10A and 10B is warmed by the LEDs 10A and 10B and stays in the headlight chamber S. As a result, the entire air in the headlight chamber S is warmed up, and the occurrence of dew condensation in the vehicle headlight H can be prevented. Further, since the lens portion L is warmed by the warm air of the headlight chamber S, it is possible to prevent frost from adhering to the lens portion L and prevent frost from adhering to the lens portion L during winter driving and causing poor visibility. can.

Further, since the bulb hood 12 can be mounted on the front end of the bulb body 2, when the LED bulb 1 of the present embodiment is used in a vehicle not equipped with the bulb hood, the bulb hood 12 is mounted on the bulb body 2. On the other hand, when the LED valve 1 of the present embodiment is used for a vehicle equipped with a bulb hood, the bulb hood 12 can be removed and used, and the vehicle equipped with a bulb hood is also equipped. It can be commonly used for vehicles that do not have it.
[Second Embodiment]
Next, the LDE valve unit according to the second embodiment of the present invention will be described. In this embodiment, the same reference numbers are assigned to the members substantially the same as those in the first embodiment described above, and the description thereof will be omitted.

The LED bulb unit according to the present embodiment is substantially the same as the LED bulb unit 100 of the first embodiment, but includes the LED bulb 101 shown in FIG. 9 in place of the LED bulb 1. The configuration of the LED bulb 101 is substantially the same as that of the LED bulb 1, but is different from the LED bulb 1 in the following points.

First, as shown in FIG. 9, the three light bulb color LEDs 10B constituting the first high beam light source 143 are arranged two-dimensionally in close proximity to each other, and as shown in FIG. 10, the second high beam light source 153 is provided. The three light bulb color LEDs 10B that compose are also arranged two-dimensionally in close proximity to each other. More specifically, of the three LEDs 10B, the two LEDs 10B on the tip side are arranged vertically at close positions of the shading plates 8c and 9c, and the remaining one LED 10B is arranged vertically. It is arranged behind the LED 10B of. Therefore, the arrangement of the LEDs 10B is generally closer to the front as compared with that of the first embodiment shown in FIG.

By arranging the plurality of LEDs 10B in two dimensions at high density in this way, the length dimensions of the first high beam light source 143 and the second high beam light source 153 in the longitudinal direction D1 of the LED valve 101 are those of the first embodiment. It becomes smaller than. As a result, the left-right width of the area of light illuminated by the first high-beam light source 143 and the second high-beam light source 153 becomes smaller, dazzling to oncoming vehicles can be suppressed more effectively, and the central portion in the left-right direction can be illuminated more brightly. It can improve visibility.

Further, the support 6 has a lower end 60 and an upper end 61 in the vertical direction D3, and the distance H2 from the lower end 60 of the support 6 to the second high beam light source 153 in the vertical direction D3 is the first from the lower end 60 of the support 6. The distance to the high beam light source 143 is set longer than H1. In this way, by making the height position of the second high beam light source 153 higher than the height position of the first high beam light source 143, the sidewalk side can be illuminated farther, and the safety of pedestrians can be further improved. ..

Also with reference to FIGS. 11 and 12, the LED bulb 101 of this embodiment includes a protective member 20 made of a light transmissive material. The protective member 20 is mounted on the support 6 and covers the first and second LED substrates 104 and 105, and is a glass cylindrical member in the present embodiment. In order to attach the protective member (protective means) 20 to the support 6, the support 6 may be inserted into the protective member 20 from the tip side, and the protective member 20 is screwed to the tip of the support 6. Is prevented from falling off. Further, the protective member 20 has a non-light transmitting portion (non-light transmitting means) 20a at the tip end portion of the peripheral surface thereof, and is designed to partially block the light from the LEDs 10A and 10B. The non-light transmitting portion 20a can be formed by, for example, aluminum vapor deposition.

By covering the first and second LED substrates 104 and 105 with the protective member 20 in this way, it is possible to prevent foreign matter from adhering to the LEDs 10A and 10B, and the user mistakenly replaces the LED 10A when the LED bulb 101 is replaced. It is possible to prevent them from being damaged by touching the 10B. Further, since the non-light transmitting portion 20a of the protective member 20 has the same function as the bulb hood 12 (FIG. 3) described above, the direct light from the LEDs 10A and 10B is radiated forward without using the bulb hood. Can be prevented.

Although the LED bulb unit according to the embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an embodiment, and various modifications and modifications can be made without departing from the scope of the present invention. It is possible.

For example, in the above embodiment, the brightness of the first low beam light source and the second low beam light source are made different by changing the number of LEDs used, but they are used in place of and / or in addition to the number of LEDs used. The brightness of the first low beam light source and the brightness of the second low beam light source may be different by changing the type of LED (by using LEDs having different brightness). Further, in the above embodiment, the first low beam light source and the first and second high beam light sources each have three LEDs, and the second low beam light source has six LEDs, but the number of LEDs included in each light source. Is not limited to this.

Further, in the second embodiment, the protective member 20 has a non-light transmitting means (non-light transmitting portion 20a), but as shown in FIG. 13, the protective member 20 (protecting means) and the non-light transmitting means are provided. Can also be a separate member. In the example of FIG. 13, the non-light transmitting means is a cylindrical member (non-light transmitting member) 20a'formed by using a non-light transmitting material, and the support is supported by a cap 112 screwed to the tip of the support 6. Dropping from 6 is prevented.

Further, the cap 112 shown in FIG. 13 and the non-light transmitting means 20a'can be integrated into a cap 112' as shown in FIG. 14, in which case the cap 112' also functions as a bulb hood. ..

Further, in the second embodiment, the valve hood 12 of the first embodiment can be used instead of the cap 112. In this case, the non-light transmitting means can be omitted.

1 LED bulb 4,104 1st LED board 5,105 2nd LED board 6 Support 6A, 6B Duct 10A White LED
10B light bulb color LED
41 1st printed wiring board 42 1st low beam light source (1st light source)
43,143 1st high beam light source 51 2nd printed wiring board 52 2nd low beam light source (2nd light source)
53,153 Second low beam light source D3 Vertical direction (second direction)
F blower fan

Claims (3)

LED bulbs used in vehicle headlights
The first LED board and
The second LED board and
The first LED substrate and the support supporting the second LED substrate are provided.
The first LED substrate includes a first light source that emits light for illuminating the oncoming lane side, and a first printed wiring board on which the first light source is mounted. The first light source is a first low beam. Includes light source and first high beam light source
The second LED substrate has a second light source that emits light for illuminating the side surface side, and a second printed wiring board on which the second light source is mounted. The second light source is a second low beam light source. And a second high beam light source, including
The support has a predetermined length in the first direction, a predetermined height in a second direction perpendicular to the first direction, and has a lower end and an upper end facing each other in the second direction.
An LED bulb characterized in that the distance from the lower end to the second high beam light source in the second direction is longer than the distance from the lower end to the first high beam light source. An LED bulb used by being attached to a bowl-shaped reflector of a vehicle headlight.
A support that extends in the front-back direction and
A first LED substrate mounted on one side of the support in the width direction perpendicular to the front-rear direction, and
A second LED substrate mounted on the other surface of the support in the width direction is provided.
The first LED substrate includes a first light source that emits light for illuminating the oncoming lane side, and a first printed wiring board on which the first light source is mounted. The first light source is a first high beam light source. Including
The second LED board has a second light source that emits light for illuminating the sidewalk side, and a second printed wiring board on which the second light source is mounted, and the second light source has a second high beam light source. Including,
The light emitted from the first light source and the second light source is reflected by the reflector and then passes through the lens portion covering the front of the reflector to illuminate the oncoming lane side and the sidewalk side, respectively.
The first high beam light source and the second high beam light source each have a plurality of LEDs arranged two-dimensionally.
The plurality of LEDs are LED bulbs including two LEDs arranged one above the other and one LED arranged behind the two LEDs. An LED bulb unit used in vehicle headlights.
LED bulb and
With a drive circuit connected to the LED bulb,
The LED bulb includes a first LED substrate, a second LED substrate, and a support that supports the first LED substrate and the second LED substrate.
The first LED board has a first light source that emits light for illuminating the oncoming lane side, and a first printed wiring board on which the first light source is mounted, and the first light source has at least one. Has an LED
The second LED board has a second light source that emits light for illuminating the sidewalk side, and a second printed wiring board on which the second light source is mounted, and the second light source is at least one LED. Have,
The brightness of the second light source is higher than the brightness of the first light source.
The first LED board has a first low beam light source and a first high beam light source mounted on the first printed wiring board, and the first light source is the first low beam light source.
The second LED board has a second low beam light source and a second high beam light source mounted on the second printed wiring board, and the second light source is the second low beam light source.
The first and second low beam light sources have at least one white LED.
The first and second high beam light sources have at least one bulb color LED.
The drive circuit is an LED valve unit characterized in that when a low beam signal is received, only the low beam light source is turned on, and when a high beam signal is received, the low beam light source and the high beam light source are turned on.

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