JP2016146300A - Light source device with socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device with a socket which can exhibit a function equivalent to that of an H4 valve without any hindrance, by using a long-life semiconductor light emitting element in a light emitting part.SOLUTION: A light source device 11 includes a socket 12 mounted on a vehicular head lamp. In a mounting axial direction of the socket 12, a first light emitting part 13 for forming a low beam pattern and a second light emitting part 14 for forming a high beam pattern are juxtaposed. The first light emitting element 13 includes a first LED 15 on an upper surface of a substrate part 22, and the substrate part 22 and a heat radiation part 23 are held at the socket 12 by an arm 20. The second light emitting part 14 includes a second LED 16 and a phosphor 17 at a front end of a base 21 so that they are located on the mounting axial line respectively, and the phosphor 17 radiates light in a wider angle than that of the first LED 15 around the mounting axial line. Thereby, the high beam pattern can be formed separately from the low beam pattern.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a light source device with a socket provided with at least two light emitting portions in a mounting axis direction of the socket.

  As this type of light source device, an H4 bulb equipped in a vehicle headlamp is conventionally known. The H4 bulb has a socket that is attached to a component of the headlamp and a glass sphere that encloses an inert gas, and a passing filament and a traveling filament are arranged in the glass sphere, and light generated by the passing filament. The low beam pattern is formed with the light, and the high beam pattern is formed with the light generated by the traveling filament.

  Patent Document 1 describes a vehicle light source device in which a traveling filament is supported on a socket with a highly rigid lead wire together with a light-shielding shade in order to prevent the filament from being broken or deformed due to vibration of the vehicle body. Has been.

JP 2014-175087 A

  However, according to the conventional light source device, since the filament is used for the light emitting part, there is a problem that the life is short. Therefore, it is conceivable to use long-life LEDs instead of filaments. However, since a semiconductor light emitting element such as an LED is installed on a substrate having a wiring portion and a heat dissipation portion, light from the light emitting portion is blocked by the substrate. For this reason, when a semiconductor light source device is manufactured as an alternative to the H4 bulb, the emission angle of the light emitting portion around the mounting axis of the socket becomes narrow, making it difficult to distinguish the high beam pattern from the low beam pattern. In addition, if the substrate is designed to be small in order to ensure a wide radiation angle, there is a problem that the heat radiation of the semiconductor light emitting element is hindered.

  Accordingly, an object of the present invention is to provide a light source device with a socket that uses a long-life semiconductor light-emitting element for a light-emitting portion and can perform the same function as an H4 bulb without hindrance.

  In order to solve the above-described problems, a light source device with a socket according to the present invention includes a socket that is attached to a lighting device, and at least two light emitting portions are disposed in a mounting axis direction of the socket, and the first and second light emitting portions are provided. Each includes a semiconductor light emitting element, and the second light emitting unit is configured to emit light emitted from the semiconductor light emitting element at a wider angle than the first light emitting unit around the attachment axis of the socket.

  Here, examples of the lighting device include a vehicular lamp, an aircraft lamp, a marine lamp, a traffic light, and an advertisement lamp. In the light source device of the present invention, semiconductor light emitting elements that generate light having different functions are used in at least two light emitting units. In the case of a vehicle headlamp, a semiconductor light emitting element for forming a low beam pattern is provided in the first light emitting part instead of the passing filament of the H4 bulb, and the second light emitting part is provided in place of the traveling filament of the H4 bulb. A semiconductor light emitting device for forming a high beam pattern is provided.

  The light source device of the present invention includes a support member that supports the first light emitting unit at a position farther from the socket than the second light emitting unit, and supports the second light emitting unit at a position closer to the socket than the first light emitting unit. The support member is formed of, for example, a metal having a high thermal conductivity or a resin material, and one end thereof is held by the socket. Preferably, the support member is provided with a feed line for supplying power to the semiconductor light emitting elements of the first and second light emitting units, and a heat radiating unit for dissipating heat generated by the semiconductor light emitting elements. In addition, a shade for shaping the light generated by the semiconductor light emitting element may be provided on a part of the support member as necessary.

  When the light source device with a socket according to the present invention is used in place of an H4 bulb for a headlamp, it is preferable to arrange the semiconductor light emitting elements of the first and second light emitting units in directions that are perpendicular to each other. Specifically, the semiconductor light emitting element of the first light emitting unit is disposed in a direction in which the optical axis thereof is orthogonal to the mounting axis of the socket, and the semiconductor light emitting element of the second light emitting unit is arranged so that the optical axis thereof is parallel to the mounting axis of the socket. Can be placed in any orientation. In addition, the second light emitting portion forming the high beam pattern includes a phosphor excited by the light of the semiconductor light emitting device so that the second light emitting portion can radiate substantially all around the socket mounting axis, and both the phosphor and the semiconductor light emitting device are mounted on the socket. It is comprised so that it may be located on an axis line.

  According to the light source device with a socket of the present invention, at least two light emitting units are disposed in the socket mounting axis direction, and the second light emitting unit emits light at a wider angle than the first light emitting unit around the socket mounting axis. Since it comprised as mentioned above, there exists the outstanding effect that a long-life semiconductor light emitting element is used for each light emission part, and the function equivalent to a H4 bulb can be exhibited without trouble.

1 is a vertical sectional view of a vehicular lamp showing a first embodiment of the present invention. It is a perspective view which shows the light source device of the vehicle lamp of FIG. It is a side view of the light source device of FIG. It is a perspective view of the light source device which shows Example 2 of this invention. It is a side view of the light source device of FIG. It is a side view of the light source device which shows Example 3 of this invention. It is a side view of the light source device which shows Example 4 of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which the invention is embodied in a light source device for a vehicle headlamp will be described with reference to the drawings. A vehicle headlamp 1 shown in FIG. 1 includes a translucent cover 3 on the front surface of a lamp body 2, and a lamp chamber 4 is formed between the lamp body 2 and the translucent cover 3. The lamp chamber 4 is provided with a reflector 5 and an extension 6, and a light source device (showing the light source device 11 of the first embodiment) is attached to the rear end annular portion 7 of the reflector 4 with a mounting bracket 8. Hereinafter, some embodiments of the light source device will be described in detail.

  As shown in FIGS. 2 and 3, the light source device 11 according to the first embodiment includes a socket 12 attached to the reflector 5, and the first light emission in the direction of the attachment axis of the socket 12 (axis A shown in FIGS. 1 and 3). The part 13 and the second light emitting part 14 are disposed. The 1st light emission part 13 is provided with 1st LED15 as a semiconductor light-emitting device, reflects the light emission of 1st LED15 in the reflector 5, and forms a low beam pattern in the vehicle forward. The second light emitting unit 14 includes a second LED 16 as a semiconductor light emitting element and a columnar phosphor 17 in which a fluorescent agent excited by light emitted from the second LED 16 is enclosed, and reflects the light of the phosphor 17 to the reflector 5. To form a high beam pattern in front of the vehicle.

  A plug 19 connected to an external power connector (not shown) is provided on the back surface of the socket 12, and an arm 20 and a base 21 project from the front surface of the socket 12. The arm 20 and the base 21 are support members that separately support the first light emitting unit 13 and the second light emitting unit 14, and are each formed of a metal or resin material having high thermal conductivity. The first light emitting unit 13 is supported by the arm 20 at a position farther from the socket 12 than the second light emitting unit 14, and the second light emitting unit 14 is supported by the base 21 at a position closer to the socket 12 than the first light emitting unit 13. Has been.

  At the front end of the arm 20, a substrate portion 22 that supports the first LED 15 on the attachment axis A and a heat radiating portion 23 for radiating the heat generated by the first LED 15 are integrally formed of the same high thermal conductivity material as the arm 20. ing. A feed line 24 for supplying electric power from the plug 19 to the first LED 15 is formed on the substrate portion 22 and the arm 20. The base 21 is formed in a truncated cone shape that is coaxial with the mounting axis A, and functions as a substrate portion having a power supply line (not shown) to the second LED 16 and as a heat radiating portion that dissipates heat generated by the second LED 16. It has become. The socket 12 incorporates a drive circuit for controlling the LEDs 15 and 16.

  The second LED 16 is mounted on the front end surface of the base 21, and the phosphor 17 is mounted so as to protrude forward from the second LED 16. The second LED 16 and the phosphor 17 are arranged side by side on the attachment axis A between the base 21 and the substrate portion 22. The first LED 15 has an optical axis orthogonal to the mounting axis A, emits light above the substrate portion 22, the second LED 16 has an optical axis parallel to the mounting axis A, and the phosphor 17 emits light from the second LED 16. It is configured to radiate around the attachment axis A to a wider angle (substantially the entire circumference of the attachment axis A) than the first LED 15.

Therefore, according to the light source device 11 of the first embodiment, the following operational effects can be obtained.
(1) The radiation angle of the second light emitting unit 14 can be made sufficiently wide so that the high beam pattern can be easily formed by distinguishing it from the low beam pattern.
(2) In particular, since both the second LED 16 and the phosphor 17 are arranged on the attachment axis A, the light emitted from the second LED 16 can be emitted from the entire circumference of the phosphor 17 to form a bright high beam pattern.

(3) Since the arm 20, the substrate part 22, and the heat radiating part 23 support the first light emitting part 13 for passing in front of the second light emitting part 14 for traveling, the basic configuration of the headlamp 1 is changed. Without this, the semiconductor light source device 11 can be used as an alternative to the H4 bulb.
(4) Since the first and second LEDs 15 and 16 are arranged in a direction perpendicular to each other, a low beam and a high beam pattern can be formed using the existing reflector 5 and shade (not shown) in the headlamp 1. .
(5) Since the heat radiation part 23 and the power supply line 24 are provided on the arm 20 and the base 21, respectively, the heat radiation and power supply of the LEDs 15 and 16 can be performed without hindrance, and the disconnection due to the vibration of the vehicle body can be reliably prevented You can also.

  In the light source device 31 according to the second embodiment shown in FIGS. 4 and 5, the substrate portion 22 and the heat radiating portion 23 of the first light emitting portion 13 are formed narrower and smaller than the first embodiment, and the two arms 20 are used. It is held in the socket 12. The phosphor 17 of the second light emitting unit 14 is formed in a substantially conical shape, and emits light emitted from the second LED 16 from the entire circumference. Therefore, according to the light source device 31 of the second embodiment, in addition to the same effects as the first embodiment, there is an advantage that the support member of the first light emitting unit 13 can be downsized and the durability can be further enhanced.

  In the light source device 41 of Example 3 shown in FIG. 6, the substrate unit 22 is provided with the first light emitting unit 13 and the second light emitting unit 14, and the shade 42 that blocks a part of the light generated by the first light emitting unit 13. Is formed. The first LED 15 is mounted on the upper surface of the substrate portion 22, and the second LED 16 is mounted on the back surface (the surface facing the socket 12) of the substrate portion 22. On the front surface of the socket 12, an arm 20 that holds the substrate portion 22 and the heat dissipation portion 23 is provided, and a conical reflecting mirror 43 that reflects light emitted from the second LED 16 to the entire circumference of the attachment axis A is formed. Therefore, according to the light source device 41 of the third embodiment, the light emitted from the second LED 16 can be emitted around the attachment axis A at a wider angle than the first LED 15 using the reflecting mirror 43.

  In the light source device 51 of Example 4 shown in FIG. 7, the first light emitting unit 13 and the second light emitting unit 14 are provided on a common support member 52. The first light emitting unit 13 includes one or more first LEDs 15 on the upper surface of the support member 52, and the second light emitting unit 14 includes one or more second LEDs 16 on the upper and lower surfaces of the support member 52, respectively. And the 2nd light emission part 14 is comprised so that the light emission of 2nd LED16 may be radiated | emitted from the 1st LED15 in the wider angle around the attachment axis A in the position near the socket 12 rather than the 1st light emission part 13. FIG. Therefore, also with the light source device 51 of the fourth embodiment, similarly to the first embodiment, it is possible to distinguish and form light distribution patterns having different functions of the high beam and the low beam.

  The light source device of the present invention is not limited to the above-described embodiment. For example, an LD (laser diode) is used instead of the LED, or a fog lamp or a rear combination lamp is installed instead of the headlamp. It is also possible to implement the configuration of each part by appropriately changing the shape without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 5 Reflector 11 Light source device (Example 1)
12 Socket 13 1st light emission part 14 2nd light emission part 15 1st LED
16 Second LED
17 Phosphor 20 Arm 21 Base 22 Substrate part 23 Heat radiation part 24 Feed line 31 Light source device (Example 2)
41 Light source device (Example 3)
51 Light source device (Example 4)

Claims (5)

  A socket attached to the lighting device, wherein at least two light emitting portions are disposed in a mounting axis direction of the socket, the first and second light emitting portions each include a semiconductor light emitting element, and the second light emitting portion is a semiconductor light emitting element; A light source device with a socket, wherein the light source device is configured to emit light at a wider angle around the mounting axis of the socket than the first light emitting unit.   The socket with a socket according to claim 1, further comprising a support member that supports the first light emitting unit at a position farther from the socket than the second light emitting unit, and supports the second light emitting unit at a position closer to the socket than the first light emitting unit. Light source device.   3. The light source device with a socket according to claim 2, wherein the support member includes a power supply line that supplies power to the semiconductor light emitting elements of the first and second light emitting units, and a heat radiating unit that dissipates heat generated by the semiconductor light emitting elements.   4. The semiconductor light emitting element of the first light emitting unit includes an optical axis perpendicular to the mounting axis of the socket, and the semiconductor light emitting element of the second light emitting unit includes an optical axis parallel to the mounting axis of the socket. A light source device with a socket according to claim 1.   The said 2nd light emission part is equipped with the fluorescent substance excited by light emission of a semiconductor light emitting element, and this fluorescent substance and a semiconductor light emitting element are comprised so that it may be located on the attachment axis line of a socket. A light source device with a socket according to claim 1.

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