JP2019040856A - LED bulb and LED bulb unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED bulb in consideration of pedestrian safety. An LED bulb 1 is used in a vehicle headlight, and 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. , Equipped with. The first LED substrate 4 has a first light source 42 that emits light for illuminating the oncoming lane side, and a first printed wiring board 41 on which the first light source 42 is mounted, and the first light source 42 has at least one. The second LED substrate 5 has a second light source 52 that emits light for illuminating the side surface side, and a second printed wiring board 51 on which the second light source 52 is mounted. The second light source 52 has at least one LED, and the brightness of the second light source 52 is higher than the brightness of the first light source 42. [Selection diagram] Fig. 2

Description

  The present invention relates to an LED bulb and an LED bulb unit used in a vehicle headlamp.

  Conventionally, various vehicle headlamps using LEDs as light sources have been proposed. For example, the headlamp disclosed in Patent Document 1 includes a heat conduction rod, a pair of printed wiring boards provided on both surfaces of the heat conduction rod, and a heat dissipation base provided with a plurality of heat dissipation fins, Low-beam and high-beam LEDs are mounted on the printed circuit board, and heat generated from the LEDs is transmitted to the heat dissipation base and dissipated from the heat dissipation fins.

  Moreover, the color temperature of light that is easy to see varies depending on weather conditions and the like. For example, if the color temperature of light is low, the near visibility is good, but the light cannot reach far and the field of view is narrowed. Conversely, if the color temperature of the light is high, the field of view is whited out and the sense of perspective is lost. Furthermore, in bad weather, light with high color temperature does not penetrate rain and the field of view becomes extremely narrow. In this regard, the vehicle headlamp system disclosed in Patent Document 2 includes a plurality of LED units having different color temperatures, and by mixing light beams having different color temperatures by changing the luminance ratio between the LED units. Generating temperature rays.

  Furthermore, the vehicle lighting device disclosed in Patent Document 3 includes a bulb as a light emission source, a bulb hood that covers the tip of the bulb, and a reflector, and the bulb and the bulb hood are fixed to the reflector. By providing the bulb hood, the direct light from the bulb is prevented from being irradiated forward, and the appearance of the vehicle lighting device is improved.

  In recent years, it has been demanded to form a low beam having a cutoff line above it by blocking a part of the light. This cut-off line is not horizontal. In the country where the vehicle is on the left side of the vehicle, the cut-off line is a left-up line (in the country on the right-hand side of the vehicle, it is a right-up line). ing. The driver can recognize the presence of the pedestrian as soon as he can look over the sidewalk, leading to improved pedestrian safety.

Japanese Patent Laid-Open No. 2006-81687 JP 2013-140724 A JP 2013-65444 A

  The LED is weak to heat and needs to be cooled, but the conventional cooling method is not efficient. Further, the method of generating light beams having color temperatures set by changing the luminance ratio of a plurality of LED units as in the cited document 2 has a problem that the light emission control is complicated and the headlamp becomes expensive. It was. Furthermore, there is a demand for retrofitting a valve hood without a valve hood depending on the vehicle type. Moreover, in the conventional vehicle headlamp, a method of illuminating the sidewalk side over a wider area than the opposite lane side by using a low beam having a cut-off line has been adopted, but luminance has not been considered.

  Then, this invention aims at provision of the LED bulb which can cool LED effectively.

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

  Another object of the present invention is to provide an LED bulb that can prevent direct light from the bulb from being irradiated forward.

  An LED bulb according to an aspect of the present invention is used in a vehicle headlamp, and includes a first LED substrate, a second LED substrate, a support body that supports the first LED substrate and the second LED substrate, The first LED board includes: a first light source that emits light for irradiating the opposite lane side; and a first printed wiring board on which the first light source is mounted, wherein the first light source is at least The second LED board includes a second light source that emits light for illuminating a sidewalk 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 luminance of the second light source is higher than the luminance of the first light source.

  An LED bulb according to another aspect of the present invention is an LED bulb used in a vehicle headlamp, and supports a first LED board, a second LED board, the first LED board, and the second LED board. The first LED board includes: a first light source that emits light for irradiating the opposite lane side; and a first printed wiring board on which the first light source is mounted. The first light source Includes a first low beam light source and a first high beam light source, and the second LED substrate emits light for irradiating a sidewalk side, a second printed wiring board on which the second light source is mounted, 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 a first direction and is predetermined in a second direction perpendicular to the first direction. Having the height, the second side And a lower end and an upper end facing in, in the second direction, a distance from the lower end to the second high beam light source is longer than the distance from the lower end to the first high beam light source.

  An LED bulb according to another aspect of the present invention is an LED bulb used in a vehicle headlamp, and supports a first LED board, a second LED board, the first LED board, and the second LED board. The first LED board includes: a first light source that emits light for irradiating the opposite lane side; and a first printed wiring board on which the first light source is mounted. The first light source Includes a first high beam light source, and the second LED board includes a second light source that emits light for illuminating a 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 each of the first high beam light source and the second high beam light source has a plurality of LEDs arranged two-dimensionally.

  An LED bulb according to another aspect of the present invention is an LED bulb used in a vehicle headlamp, and supports a first LED board, a second LED board, the first LED board, and the second LED board. And protective means made of a light transmissive material that is mounted on the support and covers the first LED substrate and the second LED substrate, and the first LED substrate emits light for irradiating the opposite lane side. 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 irradiates a sidewalk side. And a second printed wiring board on which the second light source is mounted, and the second light source has at least one LED.

  An LED bulb according to another aspect of the present invention is used in a vehicle headlamp, and includes a printed wiring board, at least one LED mounted on the printed wiring board, and the printed wiring board. A support for supporting and a blower fan for generating an airflow, wherein the support is provided with a duct, and the airflow generated by the blower fan is connected to the at least one LED via the duct. Is sprayed on.

  The support includes a base body and a board presser, the first printed wiring board is sandwiched between the base body and the board presser, and the first light source is provided on the support. Preferably, the duct is exposed through a window and the duct communicates with the window.

  An LED bulb unit according to an aspect of the present invention is used in a vehicle headlamp, and includes an LED bulb and a drive circuit connected to the LED bulb, and the LED bulb is a printed wiring. A low beam light source and a high beam light source mounted on the printed circuit 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, The drive circuit turns on only the low beam light source when receiving a low beam signal, and turns on the low beam light source and the high beam light source when receiving a high beam signal.

  An LED bulb according to still another aspect of the present invention is used in a vehicle headlamp, and includes a printed wiring board, at least one LED mounted on the printed wiring board, and the printed wiring board. 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 from the LED. It prevents direct light from being irradiated forward.

  According to the LED bulb of one aspect of the present invention, the luminance of the second light source that emits light for illuminating the sidewalk side is higher than the luminance of the first light source that emits light for illuminating the oncoming lane side. The oncoming vehicle is not dazzling and the sidewalk can be illuminated more brightly, improving the safety of pedestrians.

  According to the LED bulb of 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 height position is higher than the height position of the first high beam light source, the sidewalk side can be illuminated farther.

  According to the LED bulb according to another aspect of the present invention, each of the first high beam light source and the second high beam light source has a plurality of LEDs arranged two-dimensionally. 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 LED bulb is provided with a protective means made of a light-transmitting material that is attached to the support and covers the first LED substrate and the second LED substrate, 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 another 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 in the support. It can be cooled effectively.

  According to the LED bulb unit of one aspect of the present invention, when the driving circuit receives a high beam signal, the low beam light source having at least one white LED, and the high beam light source having at least one bulb color LED, Since the is turned on, the visibility on snowy roads and in the rain can be improved not only when illuminated only with white light but also when illuminated only with light bulb color light.

  The LED bulb according to still another aspect of the present invention includes a valve hood that is detachably attached to the distal end portion of the support, so that the LED bulb can be used even when used in a vehicle that is not equipped with a valve hood. It is possible to prevent the direct light from being irradiated forward.

Sectional drawing of the vehicle headlamp which has the LED bulb unit which concerns on 1st Embodiment of this 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. The disassembled perspective view of the LED bulb shown in FIG. The disassembled perspective view of the LED bulb shown in FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. (A) is the VIIa-VIIa sectional view taken on the line of Fig.2 (a), (b) is the VIIb-VIIb sectional view taken on the line of Fig.2 (a). The block diagram of the drive circuit with which the LED valve unit shown in FIG. 1 is provided. (A) is the left view of the LED bulb which the LED bulb unit concerning a 2nd embodiment of the present invention has, (b) is a figure which omitted a protection member from (a). (A) is a right side view of the LED bulb shown in FIG. 9, (b) is a diagram in which the protective member is omitted from (a). FIG. 10 is a perspective view of the LED bulb shown in FIG. 9. The principal part disassembled perspective view of the LED bulb shown in FIG. The principal part disassembled perspective view which shows the modification of the LED bulb shown in FIG. The principal part disassembled perspective view which shows the other modification of the LED bulb shown in FIG.

[First Embodiment]

  Hereinafter, an LDE valve unit according to a first embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, an LED bulb unit 100 according to the present embodiment is employed in a vehicle headlamp H, and includes an LED bulb 1 and a drive circuit electrically connected to the LED bulb 1 by a wiring A. 13. The vehicle headlamp 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 and used. In the following description, front, rear, left, right, upper, and lower mean front, rear, left, right, upper, and lower as viewed from the driver of the vehicle, but the longitudinal direction D1 of the LED bulb 1 and The width direction D2 is not necessarily parallel to the front-rear direction and the left-right direction as viewed 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 valve body 2, a heat radiating base 3 connected to the valve main body 2, a blower fan F mounted on the heat radiating base 3, and a mounting bracket attached to the valve main body 2. 11 and a valve hood 12 attached to the tip of the valve body 2. The valve 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 and 5. 6 and 7, the mounting bracket 11 is omitted.

  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, Have 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 bulb colored LEDs 10B arranged.

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

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

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

  As shown in FIG. 2, a window S <b> 1 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 surface of the support 6, and the other surface of the support 6 is provided on the other surface. 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. Corresponding LED substrates 4 and 5 are supported between the support base 7 and the substrate holders 8 and 9 in the width direction D2. In this embodiment, the notches 8a and 9a provided in the substrate holders 8 and 9 function as the windows S1 and S2, respectively.

  6 and 7, a pair of ducts 6A and 6B extending in the longitudinal direction D1 are provided on both sides of the support body 6 in the width direction D2. The ducts 6A and 6B communicate with the corresponding window portions S1 and S2 at the front, and communicate with the internal space S3 of the male screw portion 71 via the communication hole S4 at the rear. The front portions 6a and 6b of the ducts 6A and 6B are inclined and extended downward toward the corresponding light sources 42, 43, 52 and 53, and the airflow from the blower fan F flows through the ducts 6A and 6B. The light sources 42, 43, 52, and 53 (that is, the LEDs 10A and 10B) are directly blown.

  More specifically, with reference to FIGS. 4 and 5, the support base 7 has the male screw portion 71 described above and a main body portion 72 formed integrally with the male screw portion 71. Substrate attachment surfaces 72a and 72b for attaching the first and second LED substrates 4 and 5 are provided. The upper end of the main body 72 extends in the longitudinal direction D1 and protrudes outward in the width direction D2 from the substrate attachment surfaces 72a and 72b. An extending portion 72c is provided. The rear part 72d of the extending part 72c is wider in the width direction D2 than the front part 72e.

  Duct defining portions 8b and 9b are provided behind the notches 8a and 9a of the substrate holders 8 and 9, respectively. 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 has a substantially U-shaped vertical cross section, which is connected to the light sources 42, 43, 52, 53. Inclining downward and extending toward the front. Further, as shown in FIGS. 6 and 7, a communication hole S <b> 4 that communicates with the internal space S <b> 3 of the male screw portion 71 and penetrates the main body portion 72 in the width direction D <b> 2 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 are defined. That is, one duct 6A is defined by the extending portion 72c of the support base 7, the first LED substrate 4, and the duct defining portion 8b of the substrate holder 8, and the extending portion 72c of the support base 7, the second LED substrate 5, and the substrate The other duct 6B is defined by the duct defining portion 9b of the presser 9. The pair of ducts 6A and 6B defined in this way communicate with the internal space S3 of the male screw portion 71 via the communication hole S4. Further, the openings on both sides in the width direction D2 of the communication hole S4 are sealed by the substrate holders 8 and 9.

  As shown in FIGS. 2 and 3, the substrate holders 8 and 9 are provided with light-shielding plates 8 c and 9 c that are curved and extend upward from the lower edges of the notches 8 a and 9 a outward in the width direction D <b> 2. It has been. In the longitudinal direction D1, each of the light shielding plates 8c, 9c has a length corresponding to the corresponding low beam light source 42, 52, and shields light emitted from the corresponding low beam light source 42, 52 and traveling downward.

  The heat radiating base 3 is a hollow member, and as shown in FIG. 4, has a female screw part 31 screwed into the male screw part 71 and a heat radiating part 32 formed integrally with the female screw part 31. A large number of heat radiation fins 32 a extending in the longitudinal direction D <b> 1 are juxtaposed in the circumferential direction on the outer circumferential surface of the heat radiation portion 32. The blower fan F is accommodated and held in the heat radiating portion 32 and generates an air flow toward the front.

  The mounting bracket 11 is a member for mounting the LED bulb 1 to the reflector R, and is externally fitted to the bulb main 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. Although there is no limitation on the mounting method of the valve hood 12 to the support 6, in the example shown in FIG. 4, a female screw portion 6 a is provided at the tip of the support 6, and a through hole 12 a provided in the center of the valve hood 12. A mounting screw (not shown) inserted through is screwed into the female screw portion 6a and attached. The valve hood 12 has a cap shape that expands toward the rear, and its maximum diameter is set larger than the maximum diameter of the valve body 2. By providing such a valve hood 12, the valve body The direct light from 2 can be prevented from being irradiated forward, and the appearance of the vehicular headlamp H can be improved.

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

  In this embodiment, when a low beam signal is input from an external switch, the current control circuit 13a outputs a first current to the switching circuit 13b, and the switching circuit 13b outputs the first and second low beam light sources 42 and 52 (that is, white). Only the LED 10A) is turned on. As a result, the light from the first low beam light source 42 is reflected by the reflector R and irradiates the opposite lane side, and the light from the second low beam light source 52 is reflected by the reflector R and irradiates the sidewalk side. At this time, a light distribution pattern having a cut-off line at the upper end is formed 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 the side of the oncoming lane, and the sidewalk does not cause dazzling of the oncoming vehicle. The side can be illuminated more brightly. Thereby, the safety | security of a pedestrian can be improved and a cut-off line can be emphasized more.

  On the other hand, when a high beam signal is input from the external switch, the current control circuit 13a outputs a second current to the switching circuit 13b, and the switching circuit 13b includes the first and second low beam light sources 42 and 52 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 emitted. By simultaneously irradiating white light and light bulb color light in this way, the generation of halation can be effectively prevented not only when irradiating only white light but also when irradiating only with light bulb color light. Improve visibility on roads and rainy days.

  Here, when the LEDs 10A and 10B are turned on, heat is generated. However, the heat generated from the LEDs 10A and 10B is transmitted to the heat radiating base 3 through the support 6 and is radiated through the heat radiating fins 32a. In addition, an air flow is generated by driving the blower fan F, and the air flow flows into the ducts 6A and 6B through the internal space S3 of the heat radiating base 3 and the communication hole S4 of the support 6, and the first and second LED boards 4, 5 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 onto the LEDs 10A and 10B, and effectively cools the LEDs 10A and 10B.

  In addition, the air that has flowed into the headlight chamber S and blown onto the LEDs 10A and 10B in this way 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, and condensation in the vehicle headlamp H can be prevented. Further, since the lens portion L is warmed by the warm air in the headlight chamber S, it is possible to prevent the frost from adhering to the lens portion L, and to prevent the frost from adhering to the lens portion L during running in winter and causing poor visibility. it can.

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

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

  First, as shown in FIG. 9, the three light bulb colored LEDs 10B constituting the first high beam light source 143 are two-dimensionally arranged close to each other. As shown in FIG. The three light bulb colored LEDs 10B that are configured are also two-dimensionally arranged close to each other. More specifically, of the three LEDs 10B, the two LEDs 10B on the front end side are vertically arranged in the vicinity of the light shielding plates 8c and 9c, and the remaining one LED 10B is the two vertically arranged. It is arrange | positioned behind LED10B. Therefore, compared with the thing of 1st Embodiment shown in FIG. 3, arrangement | positioning of LED10B is the front side as a whole.

  As described above, the plurality of LEDs 10B are two-dimensionally arranged at high density, so that 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 bulb 101 are the same as those in the first embodiment. Smaller than As a result, the left and right widths of the light areas illuminated by the first high beam light source 143 and the second high beam light source 153 can be reduced, and dazzling oncoming vehicles can be more effectively suppressed, and the central portion in the left and right direction can be illuminated more brightly. And visibility can be improved.

  Further, the support 6 has a lower end 60 and an upper end 61 in the vertical direction D3, and a 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 from the lower end 60 of the support 6 to the first. It is set longer than the distance H1 to the high beam light source 143. Thus, 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, it is possible to illuminate the sidewalk side further and further improve the safety of pedestrians. .

  Referring also to FIGS. 11 and 12, the LED bulb 101 of this embodiment includes a protective member 20 made of a light transmissive material. The protection member 20 is attached to the support 6 to cover the first and second LED substrates 104 and 105, and is a glass cylindrical member in the present embodiment. In order to attach the protection member (protection means) 20 to the support body 6, the support body 6 may be inserted into the protection member 20 from the distal end side, and the protection member 20 is screwed onto the distal end of the support body 6. Is prevented from falling off. Further, the protective member 20 has a non-light transmitting portion (non-light transmitting means) 20a at the front end portion of the peripheral surface thereof so as 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 boards 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 when the LED bulb 101 is replaced, the user mistakenly detects the LED 10A. , 10B can be prevented from being damaged. Further, since the non-light transmitting portion 20a of the protective member 20 performs the same function as the above-described valve hood 12 (FIG. 3), direct light from the LEDs 10A and 10B is irradiated forward without using the valve hood. Can be prevented.

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

  For example, in the above-described embodiment, the luminance of the first low beam light source and the second low beam light source is changed by changing the number of LEDs to be used, but it is used instead of or / and in addition to the number of LEDs to be used. The brightness of the first low beam light source and the second low beam light source may be made different by changing the type of LED (using LEDs having different brightness). In the above embodiment, each of the first low beam light source and the first and second high beam light sources has 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.

  In the second embodiment, the protection member 20 has a non-light transmission means (non-light transmission part 20a). However, as shown in FIG. 13, the protection member 20 (protection means) and the non-light transmission means. Can be separate members. In the example of FIG. 13, the non-light transmissive means is a cylindrical member (non-light transmissive member) 20 a ′ formed using a non-light transmissive material, and the support is supported by a cap 112 screwed to the tip of the support 6. Omission from 6 is prevented.

  Furthermore, 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, and in this case, the cap 112 ′ also functions as a valve hood. .

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

DESCRIPTION OF SYMBOLS 1 LED bulb 4,104 1st LED board 5, 105 2nd LED board 6 Support body 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 First high beam light source 51 Second printed wiring board 52 Second low beam light source (second light source)
53, 153 Second low beam light source D3 vertical direction (second direction)
F Fan

Claims (11)

An LED bulb used in a vehicle headlamp,
A first LED substrate;
A second LED substrate;
A support for supporting the first LED substrate and the second LED substrate;
The first LED board includes a first light source that emits light for irradiating the opposite lane side, and a first printed wiring board on which the first light source is mounted, and the first light source includes at least one light source. With LEDs,
The second LED board includes a second light source that emits light for illuminating a sidewalk side, and a second printed wiring board on which the second light source is mounted, and the second light source includes at least one LED. Have
The LED bulb, wherein the brightness of the second light source is higher than the brightness of the first light source.   The LED bulb according to claim 1, wherein the number of LEDs included in the first light source is greater than the number of LEDs included in the second light source. An LED bulb used in a vehicle headlamp,
A first LED substrate;
A second LED substrate;
A support for supporting the first LED substrate and the second LED substrate;
The first LED board includes a first light source that emits light for irradiating the opposite lane side, and a first printed wiring board on which the first light source is mounted. The first light source includes a first low beam. A light source and a first high beam light source,
The second LED board includes a second light source that emits light for irradiating a sidewalk 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,
The support has a predetermined length in a 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,
The LED bulb according to claim 2, wherein a distance from the lower end to the second high beam light source is longer than a distance from the lower end to the first high beam light source in the second direction. An LED bulb used in a vehicle headlamp,
A first LED substrate;
A second LED substrate;
A support for supporting the first LED substrate and the second LED substrate;
The first LED board includes a first light source that emits light for irradiating the opposite 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 includes a second light source that emits light for illuminating a sidewalk side, and a second printed wiring board on which the second light source is mounted, and the second light source includes a second high beam light source. Including
Each of the first high beam light source and the second high beam light source has a plurality of LEDs arranged two-dimensionally. An LED bulb used in a vehicle headlamp,
A first LED substrate;
A second LED substrate;
A support for supporting the first LED substrate and the second LED substrate;
Protective means made of a light transmissive material attached to the support and covering the first LED substrate and the second LED substrate;
The first LED board includes a first light source that emits light for irradiating the opposite lane side, and a first printed wiring board on which the first light source is mounted, and the first light source includes at least one light source. With LEDs,
The second LED board includes a second light source that emits light for illuminating a sidewalk side, and a second printed wiring board on which the second light source is mounted, and the second light source includes at least one LED. LED bulb characterized by having. Further comprising a non-light transmitting means provided on the tip side of the protection means,
The non-light transmitting means shields a part of light emitted from the first and second light sources and prevents direct light from the first and second light sources from being irradiated forward. The LED bulb according to claim 5. It further includes a blower fan that generates airflow,
The support is provided with a pair of ducts,
The LED bulb according to claim 1, wherein the air flow generated by the blower fan is blown to the first and second light sources through the pair of ducts.   The LED bulb according to any one of claims 1 to 7, wherein a valve hood is detachably attached to a tip of the support. An LED bulb unit used in a vehicle headlamp,
The LED bulb according to claim 1 or 2,
A drive circuit connected to the LED bulb,
The first LED substrate 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 substrate 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 light bulb color LED;
The LED bulb unit, wherein when the low beam signal is received, only the low beam light source is turned on, and when the high beam signal is received, the drive circuit turns on the low beam light source and the high beam light source. An LED bulb used in a vehicle headlamp,
A printed wiring board;
At least one LED mounted on the printed circuit board;
A support for supporting the printed wiring board;
A blower fan for generating an airflow,
The support is provided with a duct,
The LED bulb, wherein an air flow generated by the blower fan is blown to the at least one LED through the duct. An LED bulb used in a vehicle headlamp,
A printed wiring board;
At least one LED mounted on the printed circuit board;
A support for supporting the printed wiring board;
A valve hood that is detachably attached to the tip of the support, and
The valve hood shields a part of light emitted from the LED, and prevents direct light from the LED from being irradiated forward.

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