JP2013077463A - Semiconductor type light source for vehicular lamp fitting, semiconductor type light source unit for the same, and vehicular lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make capacity of a sealing member as small as possible.SOLUTION: The vehicular lamp fitting is provided with a substrate 3, semiconductor light-emitting elements 40 to 44, control elements, wiring elements, enclosure wall members 18, an adhesive 180A adhering the enclosure wall members 18 to the substrate 3, and a sealing member 180 for sealing the semiconductor light-emitting elements 40 to 44 inside the enclosure wall members 18. The wiring elements consist of mounting pads 601 to 641 and wire pads 602 to 642. A least one of the sides of either the mounting pad 601 to 641 or the wire pad 602 to 642 opposed to the other side is orthogonal to a line segment connecting a center of the mounting pad 601 to 641 and a center of the wire pad 602 to 642. As a result, a capacity of the sealing member 180 can be made as small as possible.

Description

  The present invention relates to a semiconductor-type light source for a vehicular lamp. The present invention also relates to a semiconductor-type light source unit for a vehicle lamp. Furthermore, the present invention relates to a vehicular lamp using a semiconductor light source unit as a light source.

  This type of semiconductor-type light source is conventionally known (for example, Patent Document 1). Hereinafter, a conventional semiconductor light source will be described. A conventional semiconductor light source has a plurality of LED chips mounted on a substrate, a reflector is disposed on the substrate via an adhesive, and the reflector is filled with a transparent resin, that is, a sealing member. Is covered with a sealing member. In the conventional semiconductor-type light source, three LED chips that are light sources of the tail lamp are arranged at equal intervals on a concentric small circle, and six LED chips that are light sources of the stop lamp are on a concentric great circle. Are arranged at equal intervals.

JP 2007-176219 A

  The mounting arrangement of the LED chip of such a semiconductor light source is relatively φ5 similar to the case where a plurality of LED chips are mounted in a row in order to obtain a horizontally long flat light distribution depending on the shape of the vehicle lamp. In some cases, a plurality of LED chips are densely mounted in a narrow region in order to obtain light emission of a point light source of about ~ 20. When LED chips mounted relatively close to a specific area on a substrate are sealed together, the capacity of the sealing member is determined by the thermal expansion or contraction of the sealing member due to the lighting / extinction of the LED or the temperature change of the usage environment. It is necessary to reduce the capacity as much as possible in order to alleviate stress caused by doing so.

  In addition, the semiconductor-type light source for vehicles is suitable for a light distribution pattern of a vehicle lamp that is wide in the horizontal direction (left-right direction) and narrow in the vertical direction (up-down direction). That is, it is necessary to easily design a light distribution pattern that is wide in the horizontal direction (left-right direction) and narrow in the vertical direction (up-down direction).

  The problems to be solved by the present invention are that the capacity of the sealing member is made as small as possible and that it is suitable for the light distribution pattern of the vehicular lamp.

  The present invention (the invention according to claim 1) is a substrate having a mounting surface, a plurality of semiconductor light emitting elements mounted in a straight line on the mounting surface of the substrate, and a control for controlling light emission of the plurality of semiconductor light emitting elements. An element, a wiring element that feeds power to a plurality of semiconductor light emitting elements via a control element, an annular surrounding wall member that surrounds all of the plurality of semiconductor light emitting elements, a mounting surface of the substrate, and a surrounding wall member A plurality of mounting pads on which the wiring element is mounted on the mounting surface of the substrate, and mounting of the substrate. A plurality of wire pads mounted on the surface, a plurality of conductive adhesives for electrically connecting the plurality of semiconductor light emitting elements to the plurality of mounting pads, respectively, a plurality of semiconductor light emitting elements and a plurality of semiconductor light emitting elements Electrically connected to each wire pad A plurality of bonding wires, and at least one side of the plurality of mounting pads and the plurality of wire pads, the side facing the other of the plurality of mounting pads. It is characterized by being orthogonal to the line segments connecting the center and the centers of the plurality of wire pads.

  According to the present invention (the invention according to claim 2), the plurality of wire pads are located on the intermediate line between two adjacent semiconductor light emitting elements and at a position equidistant from the two adjacent semiconductor light emitting elements. It is characterized by being located.

  This invention (the invention according to claim 3) is characterized in that the surrounding wall member is provided with a reflecting surface for reflecting light from a plurality of semiconductor light emitting elements.

  This invention (invention concerning Claim 4) is a vehicle according to any one of claims 1 to 3, wherein the socket part is a combination of an insulating member, a heat radiating member, and a power feeding member, and is attached to the socket part. And a semiconductor-type light source for a lamp.

  The present invention (the invention according to claim 5) includes a lamp housing and a lamp lens that define a lamp chamber, and a semiconductor-type light source unit for a vehicle lamp according to claim 4, wherein the socket portion is attached to the lamp housing. The semiconductor light source is disposed in the lamp chamber.

  The semiconductor-type light source of the vehicular lamp according to the present invention (invention according to claim 1) is at least one side of the plurality of mounting pads and the plurality of wire pads, and the side facing the other is It is orthogonal to the line segments connecting the centers of the plurality of mounting pads and the centers of the plurality of wire pads, respectively. As a result, the gap between the mounting pad and the wire pad may be a distance that does not contact each other, or a distance that does not allow a plurality of wiring patterns mounted on the board to contact each other. it can. Thereby, the surrounding wall member can be made small, and the capacity of the sealing member can be made as small as possible. In addition, the manufacturing cost can be reduced by reducing the capacity of the sealing member.

  In the semiconductor-type light source of the vehicular lamp according to the present invention (the invention according to claim 1), the stress due to thermal expansion or contraction of the sealing member can be reduced and reduced by reducing the capacity of the sealing member. As a result, peeling of the semiconductor light emitting element and the bonding wire can be surely prevented, and the reliability of the product can be improved.

  In the semiconductor-type light source of the vehicle lamp according to the present invention (the invention according to claim 1), a plurality of semiconductor light-emitting elements are mounted in a straight line on the mounting surface of the substrate. Suitable for light distribution patterns of vehicular lamps that are narrow in the direction (vertical direction). That is, it is easy to design a light distribution pattern that is wide in the horizontal direction (left-right direction) and narrow in the vertical direction (up-down direction).

  The semiconductor-type light source of the vehicular lamp according to the present invention (the invention according to claim 2) has a plurality of wire pads on an intermediate line between two adjacent semiconductor light-emitting elements and two adjacent semiconductor light-emitting elements. Located at a distance from the Thereby, the surrounding wall member can be further reduced, and the capacity of the sealing member can be further reduced accordingly.

  The semiconductor-type light source of the vehicular lamp according to the present invention (the invention according to claim 2) has a plurality of wire pads on an intermediate line between two adjacent semiconductor light-emitting elements and two adjacent semiconductor light-emitting elements. Located at a distance from the Accordingly, when bonding a plurality of bonding wires to a plurality of wire pads and a plurality of semiconductor light emitting elements, the bonding direction and angle of the plurality of bonding wires can be made the same. As a result, the bonding process time of a plurality of bonding wires can be shortened, and the bonding quality stability of a plurality of bonding wires can be contributed. That is, it is possible to improve product productivity and product reliability.

  Since the semiconductor-type light source of the vehicle lamp of this invention (the invention according to claim 3) can make the surrounding wall member small, the reflecting surface of the surrounding wall member can be brought close to the semiconductor light emitting element. As a result, it is possible to increase the amount of light reflected from the reflecting surface that is light from the semiconductor light emitting element, and the light from the semiconductor light emitting element can be used effectively.

  The semiconductor-type light source unit for a vehicle lamp according to the present invention (the invention according to claim 4) achieves the same effect as the semiconductor-type light source for a vehicle lamp according to any one of the first to third aspects. be able to.

  The vehicular lamp according to the present invention (the invention according to claim 5) can achieve the same effect as the semiconductor light source unit of the vehicular lamp according to claim 4.

1 shows an embodiment of a semiconductor-type light source of a vehicle lamp according to the present invention, an embodiment of a semiconductor-type light source unit of a vehicle lamp according to the present invention, and an embodiment of a vehicle lamp according to the present invention. 1 is a longitudinal sectional view showing a state in which a semiconductor light source unit is assembled to a vehicle lamp, that is, a vertical sectional view. FIG. 2 is a perspective view showing the semiconductor light source unit in a state in which the light source unit (semiconductor type light source) and the socket unit are assembled. FIG. 3 is a front view (seen in the direction of arrow III in FIG. 2) showing the semiconductor-type light source unit in a state where the light source part (semiconductor-type light source) and the socket part are assembled. FIG. 4 shows an enclosing wall member, a plurality of semiconductor light emitting elements, and a wiring element (a plurality of bonding wires, a plurality of conductive adhesives, a plurality of mounting pads, and a plurality of wire pads). FIG. FIG. 5 shows an arrangement of a plurality of semiconductor light emitting elements and wiring elements (a plurality of bonding wires, a plurality of conductive adhesives, a plurality of mounting pads, and a plurality of wire pads). FIG. FIG. 6 is an enlarged explanatory plan view showing a relative positional relationship between the mounting pad and the wire pad. FIG. 7 is an enlarged explanatory plan view showing a modified example of the mounting pad. FIG. 8 is an enlarged explanatory cross-sectional view showing a case where the adhesive and the sealing member are made of the same resin member (A) and a case where the adhesive and the sealing member are made of different resin members (B). 4 is a sectional view taken along line VIII-VIII in FIG. 9A and 9B are enlarged explanatory sectional views showing a case where the adhesive and the sealing member are made of the same resin member (A) and a case where the adhesive and the sealing member are made of different resin members (B) (FIG. 9). 4 is a sectional view taken along line IX-IX in FIG.

  Hereinafter, an embodiment (Example) of a semiconductor-type light source of a vehicle lamp according to the present invention, an embodiment (Example) of a semiconductor-type light source unit of a vehicle lamp according to the present invention, and a vehicle according to the present invention An embodiment of a lighting device will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Description of Configuration of Embodiment)
Hereinafter, the semiconductor-type light source of the vehicle lamp in this embodiment, the semiconductor-type light source unit of the vehicle lamp in this embodiment, and the configuration of the vehicle lamp in this embodiment will be described. In FIG. 1, reference numeral 100 denotes a vehicular lamp in this embodiment.

(Description of vehicle lamp 100)
The vehicle lamp 100 is a one-lamp tail / stop lamp in this example. That is, the vehicular lamp 100 uses a tail lamp function and a stop lamp function in combination with one lamp, that is, one lamp and one lamp. The vehicle lamps 100 are respectively provided on the left and right of the rear part of a vehicle (not shown). The vehicle lamp 100 may be combined with other lamp functions (not shown) such as a backup lamp function and a turn signal lamp function to constitute a rear combination lamp.

  As shown in FIG. 1, the vehicular lamp 100 includes a lamp housing 101, a lamp lens 102, and a reflector 103, and the semiconductor-type light source unit 1 of the vehicular lamp in this embodiment.

  The lamp housing 101 is made of, for example, a light impermeable member, for example, a resin member. The lamp housing 101 has a hollow shape in which one side is open and the other side is closed. A mounting hole 104 is provided in the closed portion of the lamp housing 101. The mounting hole 104 has a circular shape. A plurality of concave portions (not shown) and a plurality of stopper portions (not shown) are provided at substantially equal intervals on the edge of the mounting hole 104.

  The lamp lens 102 is made of, for example, a light transmissive member such as a transparent resin member or a glass member. The lamp lens 102 has a hollow shape in which one side is open and the other side is closed. The periphery of the opening of the lamp lens 102 and the periphery of the opening of the lamp housing 101 are fixed in a watertight manner. A lamp chamber 105 is defined by the lamp housing 101 and the lamp lens 102.

  The reflector 103 is a light distribution control unit that performs light distribution control so that the light emitted from the semiconductor light source unit 1 is collected at a focal point F (see FIG. 3). The reflector 103 is disposed in the lamp chamber 105 and is fixed to the lamp housing 101 or the like. The reflector 103 is made of, for example, a light impermeable member, such as a resin member or a metal member. The reflector 103 has a hollow shape in which one side is open and the other side is closed. A through hole 106 is provided in the closed portion of the reflector 103 so as to communicate with the mounting hole 104 of the lamp housing 101. A reflective surface 107 is provided on the inner surface of the reflector 103. The reflector 103 is made of a separate member from the lamp housing 101, but may be a reflector integrated with the lamp housing. In this case, a reflecting surface is provided on a part of the lamp housing to provide a reflector function.

(Description of the semiconductor light source unit 1)
As shown in FIGS. 1 to 3, the semiconductor-type light source unit 1 includes a light source unit 10 as a semiconductor-type light source, a socket unit 11, and a lens unit 12 as an optical component. The light source unit 10 is attached to one end (upper end) of the socket unit 11. The lens portion 12 is fixedly or detachably attached to one end portion of the socket portion 11. The light source unit 10 is covered with the cap-shaped or cover-shaped lens unit 12.

  As shown in FIG. 1, the semiconductor light source unit 1 is mounted on the vehicular lamp 100. That is, the socket part 11 is detachably attached to the lamp housing 101 via a packing (O-ring) 108. The light source unit 10 and the lens unit 12 are arranged in the lamp chamber 105 through the mounting hole 104 of the lamp housing 101 and the through hole 106 of the reflector 103 and on the reflecting surface 107 side of the reflector 103. Has been.

(Description of the light source unit 10)
As shown in FIGS. 2 to 9, the light source unit 10 includes a substrate 3 and a plurality of semiconductor light emitting elements (LED chips) 40, 41, 42, 43, 44 (hereinafter referred to as “40˜ 44 ”, a resistance (not shown) and a diode (not shown) as control elements, a wiring pattern (not shown) as wiring elements, and bonding wires 60, 61, 62, 63, 64 (hereinafter may be described as “60 to 64”) and conductive adhesive 600, 610, 620, 630, 640 (hereinafter may be described as “600 to 640”) and a mounting pad 601, 611, 621, 631, 641 (hereinafter sometimes referred to as “601 to 641”) and wire pads 602, 612, 622, 632, 642 (hereinafter referred to as “602 to 642”). And may be described), a surrounding wall member 18, but with the sealing member 180, a.

(Description of socket part 11)
As shown in FIGS. 1 to 3, the socket portion 11 includes an insulating member 7, a heat radiating member 8, and three power feeding members 91, 92, and 93. The heat radiating member 8 having thermal conductivity and conductivity and the power feeding members 91 to 93 having conductivity are integrally incorporated in the insulating member 7 having insulation properties in an insulated state.

  The socket portion 11 has an integral structure of the insulating member 7, the heat radiating member 8, and the power feeding members 91 to 93. For example, the insulating member 7, the heat radiating member 8, and the power feeding members 91 to 93 are integrally formed by insert molding (integral molding). Or the said insulating member 7 and the said electric power feeding members 91-93 are comprised integrally by insert molding, and the said heat radiation member 8 is integrally attached to the said insulating member 7 and the said electric power feeding members 91-93 of an integral structure. is there. Alternatively, the power feeding members 91 to 93 are integrally assembled to the insulating member 7, and the heat radiating member 8 is integrally attached to the integrally assembled insulating member 7 and the power feeding members 91 to 93.

(Description of assembly structure of semiconductor light source unit 1)
As shown in FIGS. 1 to 3, the semiconductor-type light source unit 1 includes a surface of the heat radiating member 8 of the socket portion 11 in which the insulating member 7, the heat radiating member 8, and the power feeding members 91 to 93 are integrally molded. And the contact surface on the back surface of the substrate 3 on which the semiconductor light emitting elements 40 to 44 of the light source unit 10 are mounted and sealed are arranged in close contact with each other. At the same time, the power supply members 91 to 93 of the socket portion 11 and the wiring pattern of the substrate 3 are connected to the contact surface of the heat radiating member 8 and the contact of the substrate 3 via a connection member 17. While being in close contact with the surface, it is firmly electrically connected. That is, one end portion of the power supply members 91 to 93 protruding from the surface side of the heat radiating member 8 of the socket portion 11 is inserted into the cutout hole of the connection member 17, and one end portion of the power supply members 91 to 93 is inserted. And the connecting member 17 are electrically and mechanically connected by elastic contact, caulking, welding, or the like. On the other hand, the connecting member 17 is mechanically connected to the substrate 3 by fitting or the like, and electrically connected to the wiring pattern of the substrate 3 by solder or a conductive adhesive. The connection member 17 maintains a close state between the back surface of the substrate 3 and the surface of the heat dissipation member 8. As a result, the semiconductor light source unit 1 is excellent in heat dissipation performance. Further, the electrical connection state between the power feeding members 91 to 93 of the socket portion 11 and the wiring pattern of the substrate 3 is maintained. As a result, the electrical circuit connection state is strengthened.

(Description of substrate 3)
In this example, the substrate 3 is made of ceramic. As shown in FIGS. 2, 3, 8, and 9, the substrate 3 has a substantially octagonal plate shape when viewed from the top, that is, from above. Insertion holes through which the power feeding members 91, 92, and 93 of the socket portion 11 are inserted are provided at substantially the center of the right side, the left side, and the lower side of the three sides of the substrate 3. A flat mounting surface 34 is provided on the upper surface of one surface of the substrate 3. A flat contact surface is provided on the lower surface of the other surface of the substrate 3. A highly reflective surface 30 such as highly reflective paint or highly reflective vapor deposition may be further provided on the mounting surface 34 of the ceramic substrate 3 that is a highly reflective member.

  On the mounting surface 34 of the substrate 3, the five semiconductor light emitting elements 40 to 44, the control element, the wiring elements 60 to 64, 600 to 640, 601 to 641, 602 to 642, and the surrounding wall member 18. Has been implemented.

(Description of the semiconductor light emitting elements 40 to 44)
The semiconductor-type light source composed of the five semiconductor light-emitting elements 40 to 44 uses a self-luminous semiconductor-type light source such as an LED or an EL (organic EL), and in this embodiment, an LED. As shown in FIGS. 2 to 9, the semiconductor light emitting devices 40 to 44 are semiconductors having a small rectangular shape, that is, a square or a rectangular shape as viewed from a plane, that is, from a direction perpendicular to the mounting surface 34 of the substrate 3. It consists of a chip (light source chip), and in this example, it consists of a bare chip. The five semiconductor light emitting elements 40 to 44 emit light from one front surface and four side surfaces other than the surface mounted on the substrate 3. As shown in FIGS. 3 and 5, the five semiconductor light emitting elements 40 to 44 are the focal point F of the reflector 103 of the optical system and the center of the socket portion 11 of the semiconductor light source unit 1. In the vicinity of the mounting rotation center O, they are arranged in a line on a straight line XX with substantially equal gaps.

  The five semiconductor light emitting elements 40 to 44 are semiconductor light emitting elements to which a small current is supplied, and one semiconductor light emitting element 40 that is a light source of a tail lamp, that is, the first group of semiconductor light emitting elements 40, and a large current. That is, a semiconductor light emitting device that is supplied with a large current compared to the current supplied to the semiconductor light emitting device 40, and is the four semiconductor light emitting devices 41 to 44 that are the light sources of the stop lamp, that is, the second group of light emitting devices. It is divided into semiconductor light emitting elements 41 to 44. One semiconductor light emitting element 40 of the tail lamp light source of the tail lamp function includes two semiconductor light emitting elements 41 and 42 of the stop lamp light source of the right stop lamp function and a light source of the stop lamp of the left stop lamp function. The two semiconductor light emitting elements 43 and 44 are arranged in a state of being sandwiched between them. That is, one semiconductor light emitting element 40 having the tail lamp function is positioned in the middle of the five semiconductor light emitting elements 40 to 44. The four semiconductor light emitting elements 41 to 44 having the stop lamp function are connected in series in the forward direction, that is, the direction in which current flows.

  Of the five semiconductor light-emitting elements 40 to 44, one semiconductor light-emitting element 40 having the tail lamp function is disposed at the center O of the substrate 3 and at or near the center O of the heat radiating member 8. . That is, the center of one semiconductor light emitting element 40 having the tail lamp function and the center O of the substrate 3 and the center O of the heat radiating member 8 coincide with or substantially coincide with each other. Of the five semiconductor light emitting devices 40 to 44, the four semiconductor light emitting devices 41 to 44 having the stop lamp function are arranged in a line on a straight line XX, so Light emission similar to light emission by arc discharge of a discharge bulb or HID lamp can be obtained.

(Description of control element)
The resistor and the diode are mounted on the substrate 3 and are electrically connected between the power feeding members 91 to 93 of the socket portion 11 and the five semiconductor light emitting elements 40 to 44 via the wiring elements. It is connected to the. The resistor and the diode are elements that control current supplied to the five semiconductor light emitting elements 40 to 44.

(Description of wiring elements 60 to 64, 600 to 640, 601 to 641, and 602 to 642)
As shown in FIGS. 4 to 9, the wiring element includes a plurality of wiring patterns, five bonding wires 60 to 64, five conductive adhesives 600 to 640, and five mounting pads 601 to 601. 641 and five wire pads 602 to 642. The wiring elements 60 to 64, 600 to 640, 601 to 641, and 602 to 642 are electrically connected to the power feeding members 91, 92, and 93 of the socket portion 11 via the connection member 17, and the control element The power is supplied to the five semiconductor light emitting elements 40 to 44 through the.

  The plurality of wiring patterns are made of, for example, thin film wiring or thick film wiring of a conductive member. The resistor and the diode are connected to the plurality of wiring patterns. The plurality of wiring patterns are provided with the mounting pads 601 to 641 and the wire pads 602 to 642, respectively. Among the plurality of wiring patterns, the area of the wiring pattern that supplies a large current to the semiconductor light emitting elements 41 to 44 having the stop lamp function is substantially equal. Thereby, the heat generated in the plurality of wiring patterns can be released almost uniformly to the external heat radiating member 8 through the substrate 3. The plurality of wiring patterns are wired at predetermined intervals (gap).

  As shown in FIGS. 4 to 7, the mounting pads 601 to 641 have the same number as the five semiconductor light emitting elements 40 to 44, with substantially equal gaps on the straight line XX. In the example, five are arranged. The five semiconductor light emitting elements 40 to 44 are bonded to the five mounting pads 601 to 641 through conductive adhesives 600 to 640 such as silver paste, respectively.

  The mounting pads 601 to 641 are from a plane, that is, from the top, and viewed from the direction perpendicular to the mounting surface 34 of the substrate 3. 1 arc shape, 1/2 arc shape, and 3/4 arc shape). That is, of the sides of the mounting pads 601 to 641, the sides facing the wire pads 602 to 642 have an arc shape. As a result, the sides of the mounting pads 601 to 641 that are opposite to the wire pads 602 to 642 are line segments connecting the centers of the mounting pads 601 to 641 and the centers of the wire pads 602 to 642. On the other hand, it is orthogonal.

  The conductive adhesives 600 to 640 have a minute circular shape when seen from the plane. That is, the conductive adhesives 600 to 640 form a minute circular shape when seen from a plane by dripping (stamp). The diameter of the circular conductive adhesives 600 to 640 is larger than the length of one side of the square semiconductor light emitting elements 40 to 44. One side of the square mounting pads 601 to 641 is larger than the diameter of the circular conductive adhesives 600 to 640.

  As shown in FIGS. 4 to 6, the wire pads 602 to 642 are arranged in the row direction of the five semiconductor light emitting elements 40 to 44, that is, the direction intersecting the straight line XX direction, that is, the straight line XX. The same number as the five semiconductor light emitting elements 40 to 44 inside the two semiconductor light emitting elements 41 and 44 outside the five semiconductor light emitting elements 40 to 44 in a straight line direction orthogonal to In this example, five are provided.

  The five wire pads 602 to 642 are on an intermediate line between the two adjacent semiconductor light emitting elements 40 to 44 and at positions spaced equidistant from the two adjacent semiconductor light emitting elements 40 to 44. To position. 4 and 5 illustrate a state in which the five bonding wires 60 to 64 are inclined at substantially the same angle obliquely from the upper right to the lower left. Although not shown, there are cases where the five bonding wires 60 to 64 are bonded while being inclined at substantially the same angle obliquely from the upper left to the lower right.

  Among the five semiconductor light emitting elements 40 to 44, the wire pad 602 for the one semiconductor light emitting element 40 having the tail lamp function located in the middle is the right side of the five semiconductor light emitting elements 40 to 44. Among the two semiconductor light emitting elements 41 and 42 having the stop lamp function, the wire pads 612 and 622 for the two semiconductor light emitting elements 41 and 42 and the two semiconductor light emitting elements having the stop lamp function on the left side of the five semiconductor light emitting elements 40 to 44. It is arranged in a state of being sandwiched between the wire pads 632 and 642 for the elements 43 and 44.

  The wire pads 602 to 642 are from a plane, that is, from the top, and viewed from the direction perpendicular to the mounting surface 34 of the substrate 3. Combined with an arc shape. That is, of the sides of the wire pads 602 to 642, the sides facing the mounting pads 601 to 641 are formed in a half arc shape. As a result, of the sides of the wire pads 602 to 642, the side facing the mounting pads 601 to 641 is relative to the line segment connecting the center of the mounting pads 601 to 641 and the center of the wire pads 602 to 642. Orthogonal.

(Description of the surrounding wall member 18)
The surrounding wall member 18 is made of an insulating member such as a resin, in this example, a resin having elasticity that can follow the expansion and contraction of the sealing member 180, such as a thermoplastic elastomer or an olefinic TPO resin. It is configured. As shown in FIGS. 2 to 4, 8, and 9, the surrounding wall member 18 includes all of the five semiconductor light emitting elements 40 to 44 and a part of the wiring elements, that is, a plurality of the wiring patterns. And all of the five bonding wires 60 to 64 and all five conductive adhesives 600 to 640 and all five mounting pads 601 to 641 and all five wire pads 602 to 642, It forms a ring shape that surrounds.

  The surrounding wall member 18 has a height higher than the heights of the semiconductor light emitting elements 40 to 44 and the bonding wires 60 to 64 of the wiring elements. The surrounding wall member 18 is a member that regulates the capacity of filling the sealing member 180 to a small capacity.

  At least two fitting projections for temporary fixing and positioning, that is, positioning, as a fitting portion are formed on the lower end surface of the one end surface of the surrounding wall member 18 by the bottom of the inner wall surface of the surrounding wall member 18. It is integrally provided on a diagonal line passing through the center of the shape. On the other hand, the board 3 is provided with at least two fitting holes for temporary fixing and positioning as fitting parts corresponding to the fitting convex parts. By fitting the fitting convex portion and the fitting hole to each other, the surrounding wall member 18 and the substrate 3 are fixed to each other and positioned.

  The lower end surface of one end surface of the surrounding wall member 18 that is temporarily fixed to the substrate 3 and positioned by the fitting convex portion and the fitting hole is attached to the mounting surface 34 of the substrate 3 with an adhesive 180A. Are fixed by adhesion, that is, mounted.

  In the surrounding wall member 18 mounted on the substrate 3, in the space defined by the mounting surface 34 of the substrate 3 and the inner peripheral surface of the surrounding wall member 18, The semiconductor light emitting elements 40 to 44 and the five wire pads 602 to 642 are respectively mounted, the five bonding wires 60 to 64 are bonded, and the sealing member 180 is filled. .

  The adhesive 180A and the sealing member 180 are made of the same resin member. In this example, the adhesive 180A and the sealing member 180 have low elastic characteristics in the high temperature environment region of the semiconductor light emitting elements 40 to 44, and the adhesive 180A and the sealing member 180 in the high temperature environment region. And a member that absorbs expansion / contraction of the surrounding wall member 18, for example, a phenyl silicone resin member. The adhesive 180A and the sealing member 180 may be made of the same resin member. For example, a methyl silicone resin member, an epoxy resin member, or a polyurethane resin member (urethane resin member) may be used. There may be.

  On the inner peripheral surface of the surrounding wall member 18, light emitted from the semiconductor light emitting elements 40 to 44, particularly the four side surfaces of the semiconductor light emitting elements 40 to 44, is transmitted in a predetermined direction, for example, the semiconductor light emitting elements 40 to 40. A reflecting surface 181 is provided to reflect light in the same direction as the direction of light emitted from the front surface 44. As shown in FIGS. 6 and 7, the reflection surface 181 is inclined so as to extend from the lower end of one end of the inner peripheral surface of the surrounding wall member 18 to the upper end of the other end. The reflective surface 181 is configured such that the entire surrounding wall member 18 is made of a highly reflective member, or, for example, titanium oxide is contained in the resin of the surrounding wall member 18 such as PBT, PPA, etc. Are formed white, or only the inner peripheral surface of the surrounding wall member 18 is formed of a highly reflective member.

(Description of the shape of the inner peripheral surface of the surrounding wall member 18)
The shape of the inner peripheral surface of the surrounding wall member 18 is the contour shape of the portion where the mounting surface 34 of the substrate 3 and the inner peripheral surface of the surrounding wall member 18 are in contact, that is, the inner periphery of the surrounding wall member 18. It is the outline shape of the angle | corner which a surface and a bottom face make. As shown in FIG. 4, the shape of the inner peripheral surface of the surrounding wall member 18 is such that the column direction of the five semiconductor light emitting elements 40 to 44 is viewed in a direction perpendicular to the mounting surface 34 of the substrate 3. The shape is based on an ellipse with the major axis direction.

  The reflection surface 181 on the inner peripheral surface of the surrounding wall member 18 is inclined so as to extend from the lower end at one end to the upper end at the other end. For this reason, the contour shape of the angle formed by the inner peripheral surface and the upper surface of the surrounding wall member 18, that is, the contour shape of the upper end of the inner peripheral surface of the surrounding wall member 18 is a shape based on an ellipse. The contour shape of the angle formed by the inner peripheral surface and the bottom surface of the surrounding wall member 18, that is, the shape that is slightly larger than the lower end contour shape of the inner peripheral surface of the surrounding wall member 18. The inner peripheral surface of the surrounding wall member 18 is not necessarily an inclined surface but may be a vertical surface. In this case, the lower end contour shape of the inner peripheral surface of the surrounding wall member 18 and the upper end contour shape of the inner peripheral surface of the surrounding wall member 18 are substantially the same.

  As shown in FIG. 4, the shape of the outer peripheral surface of the surrounding wall member 18 is slightly larger than the shape of the inner peripheral surface of the surrounding wall member 18, that is, the five semiconductor light emitting elements 40 to 44. The shape is based on an ellipse whose major axis is the column direction. The wall thickness of the surrounding wall member 18, that is, the thickness from the inner circumferential surface to the outer circumferential surface of the surrounding wall member 18 is substantially uniform. That is, the shape and size of the cross section of the surrounding wall member 18 are uniform or almost uniform. The cross section of the surrounding wall member 18 is a surface cut by a plane orthogonal to the inner and outer peripheral surfaces of the surrounding wall member 18. By making the wall thickness of the surrounding wall member 18 substantially uniform, the five semiconductor light emitting elements 40 to 44 and a part of the wiring elements (one of the plurality of wiring patterns) sealed by the sealing member 180 are formed. And the five bonding wires 60 to 64, the five mounting pads 601 to 641, the five wire pads 602 to 642 and the five conductive adhesives 600 to 640). Since the stress acting on can be made uniform (equal), adverse effects due to stress bias can be prevented.

  As shown in FIG. 6, between the lower end of one end of the inner peripheral surface of the surrounding wall member 18 and the wire pad 642 (612 to 632), the lower end of one end of the inner peripheral surface of the surrounding wall member 18 The distance between the wire pads 642 (612 to 632) so as not to contact each other, for example, 0.3 mm to 0.5 mm is provided. The wire pads 612 to 642 are wire pads for the four semiconductor light emitting elements 41 to 44 having the stop lamp function.

  As shown in FIG. 7, between the lower end of one end of the inner peripheral surface of the surrounding wall member 18 and the conductive adhesive 640 (610) of the semiconductor light emitting element 44 (41), the surrounding wall member 18 is disposed. The distance between the lower end of one end of the inner peripheral surface of the semiconductor light emitting device 44 and the conductive adhesive 640 (610) of the semiconductor light emitting element 44 (41) is set such that it is not in contact with each other, for example, 0.3 mm to 0.5 mm. Yes. The semiconductor light emitting elements 41 and 44 are semiconductor light emitting elements at both left and right ends in the major axis direction of the ellipse among the four semiconductor light emitting elements 41 to 44 having the stop lamp function.

(Description of sealing member 180)
The sealing member 180 is the same resin member as the adhesive 180A, and is made of a light transmissive member. The sealing member 180 is the surrounding wall that is fitted and fixed to the substrate 3 after the semiconductor light emitting elements 40 to 44 are mounted on the substrate 3 and the bonding wires 60 to 64 are bonded. The recess formed by the member 18 is filled. When the sealing member 180 is cured, all of the five semiconductor light emitting elements 40 to 44, a part of the plurality of wiring patterns, all of the bonding wires 60 to 64, all of the mounting pads 601 to 641, and the above All the wire pads 602 to 642 and the conductive adhesives 600 to 640 are sealed by the sealing member 180.

  The sealing member 180 includes all of the five semiconductor light emitting elements 40 to 44, a part of the plurality of wiring patterns, the bonding wires 60 to 64, the mounting pads 601 to 641, and the wire pads 602. 642 and all the conductive adhesives 600 to 640 are prevented from being influenced from the outside, for example, contact with other materials and adhesion of dust, and are protected from ultraviolet rays, sulfide gas, NOx, and water. Is. That is, the sealing member 180 protects the five semiconductor light emitting elements 40 to 44 from disturbance.

(Description of insulating member 7)
The insulating member 7 is provided with an attachment portion 70 for attaching the semiconductor light source unit 1 to the vehicular lamp 100 detachably or fixedly. The insulating member 7 is made of, for example, an insulating resin member. The insulating member 7 has a substantially cylindrical shape whose outer diameter is slightly smaller than the inner diameter of the mounting hole 104 of the lamp housing 101. A flange portion 71 is integrally provided at an upper end portion of one end portion of the insulating member 7. In the upper end portion of the one end portion of the insulating member 7, a plurality of, in this example, four mounting portions 70 are integrally provided so as to correspond to the concave portion of the lamp housing 101.

  The mounting portion 70 is used to equip the vehicular lamp 100 with the semiconductor light source unit 1. That is, a part of the socket portion 11 on the lens portion 12 side and the mounting portion 70 are inserted into the mounting hole 104 and the concave portion of the lamp housing 101. In this state, the socket portion 11 is rotated around the center O axis, and the mounting portion 70 is brought into contact with the stopper portion of the lamp housing 101. At this time, the mounting portion 70 and the flange portion 71 sandwich the edge of the mounting hole 104 of the lamp housing 101 from above and below via the packing 108 (see FIG. 1).

  As a result, as shown in FIG. 1, the socket portion 11 of the semiconductor light source unit 1 is detachably or fixedly attached to the lamp housing 101 of the vehicular lamp 100 via the packing 108. At this time, as shown in FIG. 1, a portion of the socket portion 11 that protrudes outward from the lamp housing 101, that is, a portion below the lamp housing 101 in FIG. 1 is in the lamp chamber 105 of the socket portion 11. Is larger than the portion housed in the lamp housing 101, that is, the portion above the lamp housing 101 in FIG.

  On the upper end surface of the one end surface of the insulating member 7, a convex portion is integrally provided. A light source connector 13 is integrally provided at the lower end of the other end of the insulating member 7. A connector 14 on the power supply side is attached to the connector portion 13 so as to be mechanically detachable and electrically connectable.

(Description of heat dissipation member 8)
The heat radiating member 8 radiates heat generated by the light source unit 10 to the outside. The heat dissipating member 8 is made of, for example, an aluminum die casting or a resin member having heat conductivity and conductivity. The heat dissipating member 8 has a flat shape at the upper end at one end and a fin shape from the middle to the lower end at the other end. A contact surface is provided on the upper surface of one end of the heat radiating member 8. The heat radiating member 8 is bonded to the contact surface with a heat conductive medium (not shown) in a state where the contact surfaces of the substrate 3 are in contact with each other. As a result, the semiconductor light emitting elements 40 to 44 are positioned corresponding to the center O of the heat radiating member 8 and the portion near the center O of the socket portion 11 through the substrate 3. .

  The heat conductive medium is, for example, a heat conductive adhesive, and is made of an epoxy resin adhesive, a silicone resin adhesive, an acrylic resin adhesive, etc. Form, tape form, etc. The heat conductive medium may be a heat conductive grease in addition to the heat conductive adhesive.

  Cutouts are provided in the center of the right side, the left side, and the lower side of the three sides of the heat radiating member 8 so as to correspond to the insertion hole of the substrate 3 and the convex portion of the insulating member 7, respectively. The three power supply members 91 to 93 are disposed in the notch of the heat dissipation member 8 and the insertion hole of the substrate 3, respectively. The insulating member 7 is interposed between the heat radiating member 8 and the power feeding members 91 to 93. The heat radiating member 8 is in close contact with the insulating member 7. The power supply members 91 to 93 are in close contact with the insulating member 7.

(Description of power supply members 91-93)
The power supply members 91 to 93 supply power to the light source unit 10. The power feeding members 91 to 93 are made of, for example, a conductive metal member. The upper end portions of the one end portions of the power supply members 91 to 93 have a divergent shape, and are respectively located in the notches of the heat radiating member 8 and the insertion holes of the substrate 3. One end portions of the power supply members 91 to 93 protrude from the convex portion of the insulating member 7 and are electrically and mechanically connected to the connection member 17.

  The lower ends of the other end portions of the power supply members 91 to 93 have a narrowed shape and are disposed in the connector portion 13. The other ends of the power supply members 91 to 93 constitute male terminals, that is, male terminals.

(Description of connecting member 17)
The connecting member 17 is composed of a member having conductivity, elasticity, malleability, ductility, and plasticity, for example, a member such as phosphor bronze or brass. The connecting member 17 electrically connects the light source unit 10 and the socket unit 11.

  That is, the connection member 17 is mechanically connected to the substrate 3 by fitting or the like, and is connected to the conductor of the wiring element of the substrate 3 by solder or a conductive adhesive (not shown). Electrically connected. On the other hand, the connection member 17 is electrically and mechanically connected to one end of the power supply members 91 to 93 by elastic contact, crimping, welding, or the like.

(Description of connector portion 13 and connector 14)
The connector 14 is provided with a female terminal, that is, a female terminal (not shown) that is electrically connected to the male terminal of the connector portion 13. By attaching the connector 14 to the connector portion 13, the female terminal is electrically connected to the male terminal. Further, by removing the connector 14 from the connector portion 13, the electrical connection between the female terminal and the male terminal is interrupted.

  As shown in FIG. 1, the first female terminal and the second female terminal among the female terminals of the connector 14 are connected to a power source, for example, a DC power source battery (not shown) via harnesses 144 and 145 and a switch (not shown). (Not shown). A third female terminal of the female terminals of the connector 14 is grounded or grounded via a harness 146. The connector portion 13 and the connector 14 are 3-pin type connector portions and connectors. That is, they are a three-pin type connector portion and a connector including the three power supply members 91 to 93, the three male terminals, and the three female terminals.

(Description of the lens unit 12)
The lens unit 12 is made of a light transmissive member. The lens unit 12 is provided with an optical control unit (not shown) such as a prism that optically controls and emits light from the five semiconductor light emitting elements 40 to 44. The lens unit 12 is an optical component.

  As shown in FIG. 1, the lens portion 12 is attached to one end opening of one end portion of the cylindrical socket portion 11 so as to cover the light source portion 10. The lens portion 12 together with the sealing member 180 prevents the five semiconductor light emitting elements 40 to 44 from being affected from the outside, for example, contact with other things or adhesion of dust, and It protects against ultraviolet rays, sulfur gas, NOx and water. That is, the lens unit 12 protects the five semiconductor light emitting elements 40 to 44 from disturbance. In addition to the five semiconductor light emitting elements 40 to 44, the lens unit 12 includes the resistance of the control element, the plurality of wiring patterns of the diode and the wiring element, the bonding wires 60 to 64, and the mounting. The pads 601 to 641, the wire pads 602 to 642, and the conductive adhesives 600 to 640 are also protected from disturbance. The lens portion 12 may be provided with a vent (not shown).

(Description of the operation of the embodiment)
The semiconductor-type light source (light source unit 10) of the vehicle lamp in this embodiment, the semiconductor-type light source unit 1 of the vehicle lamp in this embodiment, and the vehicle lamp 100 in this embodiment (hereinafter referred to as “semiconductor-type light source in this embodiment”). (The light source unit 10, the semiconductor light source unit 1, and the vehicular lamp 100 ”) are configured as described above, and the operation thereof will be described below.

  First, the switch is operated to turn on the tail lamp. Then, a current is supplied to one semiconductor light emitting element 40 having a tail lamp function. As a result, one semiconductor light emitting element 40 having a tail lamp function emits light.

  The light emitted from one semiconductor light emitting element 40 having the tail lamp function is transmitted through the sealing member 180, the air layer, and the lens portion 12 of the semiconductor light source unit 1, and the light distribution is controlled. A part of the light emitted from the semiconductor light emitting element 40 is reflected by the highly reflective surface 30 of the substrate 3 to the lens unit 12 side. The light subjected to the light distribution control is transmitted through the lamp lens 102 of the vehicular lamp 100, is again subjected to the light distribution control, and is irradiated to the outside. Thereby, the vehicular lamp 100 irradiates the light distribution of the tail lamp function to the outside.

  Next, the switch is operated to turn on the stop lamp. Then, a current is supplied to the four semiconductor light emitting elements 41 to 44 having a stop lamp function. As a result, the four semiconductor light emitting elements 41 to 44 having the stop lamp function emit light.

  Light emitted from the four semiconductor light emitting elements 41 to 44 having the stop lamp function is transmitted through the sealing member 180, the air layer, and the lens portion 12 of the semiconductor light source unit 1, and the light distribution is controlled. A part of the light emitted from the semiconductor light emitting elements 41 to 44 is reflected by the highly reflective surface 30 of the substrate 3 to the lens unit 12 side. The light subjected to the light distribution control is transmitted through the lamp lens 102 of the vehicular lamp 100, is again subjected to the light distribution control, and is irradiated to the outside. Thereby, the vehicular lamp 100 irradiates the light distribution of the stop lamp function to the outside. The light distribution of the stop lamp function is brighter, that is, the luminous flux, the luminance, the luminous intensity, and the illuminance are larger than the light distribution of the tail lamp function.

  Here, heat generated in the semiconductor light emitting elements 40 to 44 of the light source unit 10, the resistance of the control element, and the conductors of the diode and the wiring element is transmitted to the heat radiating member 8 through the substrate 3 and the heat conductive medium, and this heat dissipation. Radiated from the member 8 to the outside.

(Explanation of effect of embodiment)
The semiconductor-type light source, that is, the light source unit 10, the semiconductor-type light source unit 1, and the vehicular lamp 100 according to this embodiment is configured and operated as described above. The effects will be described below.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicular lamp 100 in this embodiment, the side facing the five wire pads 602 to 642 out of the sides of the five mounting pads 601 to 641. Since it has an arc shape, the sides of the five mounting pads 601 to 641 that are opposite to the five wire pads 602 to 642 are the center of the five mounting pads 601 to 641 and the five wires. It is orthogonal to the line segments connecting the centers of the pads 602 to 642, respectively. On the other hand, among the sides of the five wire pads 602 to 642, the sides facing the five mounting pads 601 to 641 form a half arc shape, so the sides of the five wire pads 602 to 642 Of these, the sides facing the five mounting pads 601 to 641 are orthogonal to the line segments connecting the centers of the five mounting pads 601 to 641 and the centers of the five wire pads 602 to 642, respectively. . As a result, the semiconductor-type light source in this embodiment, that is, the light source unit 10, the semiconductor-type light source unit 1, and the vehicular lamp 100 are such that the gaps between the mounting pads 601 to 641 and the wire pads 602 to 642 do not contact each other. Or a distance that prevents a plurality of wiring patterns from contacting each other, for example, a necessary minimum gap of 0.3 mm to 0.5 mm. Thereby, since the semiconductor-type light source, ie, the light source unit 10, the semiconductor-type light source unit 1, and the vehicular lamp 100 in this embodiment can further reduce the surrounding wall member 18, the sealing member 180 is further reduced in capacity. be able to. In addition, the manufacturing cost can be reduced by reducing the capacity of the sealing member 180.

  Here, with respect to the gaps between the mounting pads 601 to 641 and the wire pads 602 to 642, the sides of the mounting pads 601 to 641 and the sides of the wire pads 602 to 642 are arc-shaped, and the sides of the mounting pads 601 to 641 The case where the sides of the wire pads 602 to 642 are rectangular will be described with reference to FIG.

  First, when the sides of the mounting pads 601 to 641 and the sides of the wire pads 602 to 642 are rectangular, the gap between the mounting pads 601 to 641 and the wire pads 602 to 642 is T1. The gap T1 is a distance such that the mounting pads 601 to 641 and the wire pads 602 to 642 do not contact each other, or a distance that does not allow a plurality of wiring patterns to contact each other, for example, 0.3 mm to 0.5 mm. It is a gap.

  When the sides of the mounting pads 601 to 641 are formed in an arc shape, the mounting pads 601 to 641 can be made smaller than the gap T1 by the gap T2. That is, the gap can be set to T1-T2. Further, when the sides of the wire pads 602 to 642 are formed in an arc shape, the gap can be made smaller than the gap T1 by the gap T3. That is, the gap can be set to T1-T3. Furthermore, when the sides of the mounting pads 601 to 641 and the sides of the wire pads 602 to 642 are formed in an arc shape, the gaps T2 and T3 can be made smaller than the gap T1. That is, the gap can be set to T1- (T2 + T3).

  As shown in FIG. 7, the sides of the mounting pads 601 to 641 may be straight lines orthogonal to a line segment connecting the centers of the mounting pads 601 to 641 and the centers of the wire pads 602 to 642. Similarly, the sides of the wire pads 602 to 642 may be straight lines orthogonal to a line segment connecting the centers of the mounting pads 601 to 641 and the centers of the wire pads 602 to 642.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicular lamp 100 in this embodiment, since the capacity of the sealing member 180 becomes small, stress due to thermal expansion and contraction of the sealing member 180 is reduced. Relaxation can be reduced. As a result, peeling of the semiconductor light emitting elements 40 to 44 and the bonding wires 60 to 64 can be reliably prevented, and the reliability of the product can be improved.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicle lamp 100 in this embodiment, five semiconductor light emitting elements 40 to 44 are mounted on the mounting surface 34 of the substrate 3 in a straight line XX. Therefore, it is suitable for a light distribution pattern of a vehicular lamp that is wide in the horizontal direction (left-right direction) and narrow in the vertical direction (up-down direction). That is, it is easy to design a light distribution pattern that is wide in the horizontal direction (left-right direction) and narrow in the vertical direction (up-down direction).

  As shown in FIG. 5, the semiconductor light source in this embodiment, that is, the light source unit 10, the semiconductor light source unit 1, and the vehicular lamp 100 includes five wire pads 602 to 642 and two adjacent semiconductor light emitting elements 40. ˜44 and located at a position equidistant from the two adjacent semiconductor light emitting elements 40˜44. Thereby, the semiconductor-type light source, that is, the light source unit 10, the semiconductor-type light source unit 1, and the vehicular lamp 100 in this embodiment can further reduce the surrounding wall member 18, and further increase the capacity of the sealing member 180 accordingly. Small capacity can be achieved.

  As shown in FIG. 5, the semiconductor light source in this embodiment, that is, the light source unit 10, the semiconductor light source unit 1, and the vehicular lamp 100 includes five wire pads 602 to 642 and two adjacent semiconductor light emitting elements 40. ˜44 and located at a position equidistant from the two adjacent semiconductor light emitting elements 40˜44. Thereby, the semiconductor type light source in this embodiment, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicular lamp 100 includes five wire pads 602 to 642 and five semiconductor light emitting elements 40 to 44. When bonding the bonding wires 60 to 64, the bonding directions and angles of the five bonding wires 60 to 64 can be made the same, as shown in FIGS. As a result, the semiconductor light source in this embodiment, that is, the light source unit 10, the semiconductor light source unit 1, and the vehicular lamp 100 can reduce the bonding process time of the five bonding wires 60 to 64, and 5 This can contribute to the bonding quality stability of the bonding wires 60 to 64. That is, it is possible to improve product productivity and product reliability.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicle lamp 100 in this embodiment, the adhesive 180A and the sealing member 180 are made of the same resin member, that is, the adhesive 180A and the sealing member. Since the glass transition temperature and the coefficient of thermal expansion of 180 are the same, even if the adhesive 180A protrudes toward the sealing member 180, no peeling occurs at the interface between the adhesive 180A and the sealing member 180. . For this reason, it is not necessary to enlarge the surrounding wall member 18 by the amount of protrusion of the adhesive 180A. Thereby, the surrounding wall member 18 can be made small, and the capacity | capacitance of the sealing member 180 can be made as small as possible by that much. By reducing the capacity of the sealing member 180, the manufacturing cost can be reduced.

  Here, the size (see FIGS. 8A and 9A) of the surrounding wall member 18 when the adhesive 180A and the sealing member 180 are made of the same resin member, the adhesive 182 and the sealing member. A difference between the size of the surrounding wall member 18 </ b> A (see FIGS. 8B and 9B) when the resin member 180 is different from the resin member will be described.

  That is, when the adhesive 182 and the sealing member 180 are made of different resin members, the adhesive 182 protrudes to the sealing member 180 side, and the sealing member 180 and the adhesive 182A that protrudes Separation may occur at the interface. When this peeling occurs, the semiconductor light emitting elements 40 to 44 and the bonding wires 60 to 64 may be peeled off from the substrate 3 due to the influence of the peeling. For this reason, in the case where the adhesive 182 and the sealing member 180 are made of different resin members, it is necessary to increase the surrounding wall member 18A by the amount T of the adhesive 182 that protrudes. As a result, the capacity of the sealing member 180 is reduced.

  On the other hand, in the case where the adhesive 180A and the sealing member 180 are made of the same resin member, even if the adhesive 180A protrudes toward the sealing member 180, the adhesive 180A and the sealing member 180 No peeling occurs at the interface. For this reason, it is not necessary to make the surrounding wall member 18 larger by the protruding portion T of the adhesive 182 like the surrounding wall member 18A in which the adhesive 182 and the sealing member 180 are different. Accordingly, the surrounding wall member 18 can be reduced by T as compared with the surrounding wall member 18A in which the adhesive 182 and the sealing member 180 are different, and accordingly, the capacity of the sealing member 180 is as small as possible. Can be.

  The surrounding wall member 18 is such that the wire bonding machine does not contact the inner peripheral surface of the surrounding wall member 18 when bonding the bonding wires 60 to 64 to the wire pads 602 to 642 by a wire bonding machine (not shown). The necessary minimum gap, for example, a gap of 0.3 mm to 0.5 mm can be made small enough to be provided between the inner peripheral surface of the surrounding wall member 18 and the wire pads 602 to 642. In addition, the surrounding wall member 18 has a necessary minimum gap such that the mounting machine does not contact the inner peripheral surface of the surrounding wall member 18 when the semiconductor light emitting elements 40 to 44 are mounted by the mounting machine, for example, 0.3 mm to The gap of 0.5 mm can be made small enough to be provided between the inner peripheral surface of the surrounding wall member 18 and the semiconductor light emitting elements 40 to 44.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicle lamp 100 in this embodiment, the adhesive 180A and the sealing member 180 are made of the same resin member. No peeling occurs at the interface, and the capacity of the sealing member 180 is reduced, so that the stress due to thermal expansion and contraction of the sealing member 180 can be reduced. As a result, peeling of the semiconductor light emitting elements 40 to 44 and the bonding wires 60 to 64 can be reliably prevented, and the reliability of the product can be improved.

  In the semiconductor type light source, that is, the light source unit 10, the semiconductor type light source unit 1, and the vehicle lamp 100 in this embodiment, the adhesive 180A and the sealing member 180 are made of the same resin member. Can be cured at the same time, or can be first cured in a short time after application of the adhesive 180A, and then the injection curing of the sealing member 180 and a continuous process can be performed, thereby shortening the manufacturing process. Accordingly, the manufacturing cost can be reduced.

  In this embodiment, the semiconductor-type light source, that is, the light source unit 10, the semiconductor-type light source unit 1, and the vehicular lamp 100 are compared with the epoxy resin because the adhesive 180A and the sealing member 180 are made of the same resin member phenyl-based silicone. Thus, the gas resistance effect is large, and the stress relaxation effect due to the low elastic property is large compared to methyl silicone.

  In this embodiment, the semiconductor light source, that is, the light source unit 10, the semiconductor light source unit 1, and the vehicular lamp 100, the surrounding wall member 18 is compared with the surrounding wall member 18A in which the adhesive 182 and the sealing member 180 are different. Therefore, the reflecting surface 181 of the surrounding wall member 18 can be brought close to the semiconductor light emitting elements 40 to 44. As a result, the amount of light reflected from the reflecting surface 181 that is light from the semiconductor light emitting elements 40 to 44 can be increased, and light from the semiconductor light emitting elements 40 to 44 can be used effectively.

(Description of example other than embodiment)
In the above embodiment, five semiconductor light emitting elements 40 to 44 are used. However, in the present invention, the number of semiconductor light emitting elements may be 2 to 4, or 6 or more. The number and layout of the semiconductor light emitting elements used as the tail lamp function and the number and layout of the semiconductor light emitting elements used as the stop lamp function are not particularly limited. That is, it is sufficient that a plurality of semiconductor light emitting elements are mounted in a line.

  Moreover, in the said embodiment, it uses for the dual function lamp of a tail stop lamp. However, in the present invention, it can also be used for a dual function lamp of a combination lamp other than a dual function lamp of a tail stop lamp. That is, a semiconductor light-emitting element that is supplied with a small current and emits a small amount of light and a semiconductor light-emitting element that is supplied with a large current and emits a large amount of light can be substituted for a subfilament having a small amount of emitted light and a main filament having a large amount of light emitted. it can.

  Furthermore, in the said embodiment, it uses for the dual function lamp of a tail stop lamp. However, in the present invention, it can be used for a single-function lamp. That is, a plurality of semiconductor light emitting elements can be used for a single function lamp instead of a single filament. Single-function lamps include turn signal lamps, backup lamps, stop lamps, tail lamps, low beam lamps for headlamps, that is, headlamps for passing, highlight lamps for headlamps, that is, headlamps for driving, fog lamps, clearance lamps, cornering lamps, dimming lamps. There are time running lamps.

  Furthermore, in the said embodiment, it uses for switching of two lamps, a tail lamp and a stop lamp. However, in the present invention, it can be used for switching three or more lamps, or can be used for one lamp that does not perform switching.

  Furthermore, in the above-described embodiment, the sides of the five mounting pads 601 to 641 and the sides of the five wire pads 602 to 642 are arcuate (or straight lines orthogonal to the line segment connecting the centers). It is what. However, in the present invention, only the sides of the five mounting pads 601 to 641 may have an arc shape (or a straight line perpendicular to the line segment connecting the centers), or the five wire pads 602. Only the sides of ˜642 may be arcuate (or a straight line orthogonal to the line connecting the centers).

DESCRIPTION OF SYMBOLS 100 Vehicle lamp 101 Lamp housing 102 Lamp lens 103 Reflector 104 Mounting hole 105 Lamp chamber 106 Through-hole 107 Reflecting surface 108 Packing 1 Semiconductor type light source unit 10 Light source part (semiconductor type light source)
DESCRIPTION OF SYMBOLS 11 Socket part 12 Lens part 13 Connector part 14 Connector 144, 145, 146 Harness 17 Connection member 18, 18A Surrounding wall member 180 Sealing member 180A Adhesive consisting of the same resin member as the sealing member 181 Reflecting surface 182 Sealing member and Adhesive made of different resin member 182A Protruding portion of adhesive made of resin member different from sealing member 3 Substrate 30 High reflection surface 34 Mounting surface 40, 41, 42, 43, 44 Semiconductor light emitting device 60, 61, 62 , 63, 64 Bonding wire (wiring element)
600, 610, 620, 630, 640 conductive adhesive (wiring element)
601, 611, 621, 631, 641 Mounting pad (wiring element)
602, 612, 622, 632, 642 Wire pad (wiring element)
7 Insulating member 70 Mounting portion 71 Hut 8 Radiating member 91, 92, 93 Feed member F Focal point O Center XX Straight line

Claims (5)

A substrate having a mounting surface;
A plurality of semiconductor light emitting devices mounted in a straight line on the mounting surface of the substrate;
A control element for controlling light emission of the plurality of semiconductor light emitting elements;
A wiring element that feeds power to the plurality of semiconductor light emitting elements through the control element;
A ring-shaped surrounding wall member surrounding all of the plurality of semiconductor light emitting elements;
A light-transmitting sealing member that seals the plurality of semiconductor light-emitting elements in the recess formed in the mounting surface of the substrate and the surrounding wall member;
With
The wiring element includes a plurality of mounting pads mounted on the mounting surface of the substrate, a plurality of wire pads mounted on the mounting surface of the substrate, and a plurality of wiring pads mounted on the mounting surface. A plurality of conductive adhesives that electrically connect the semiconductor light emitting elements, and a plurality of bonding wires that are electrically connected to the plurality of semiconductor light emitting elements and the plurality of wire pads, respectively. And having
At least one side of the plurality of mounting pads and the plurality of wire pads, the side facing the other is a center of the plurality of mounting pads and a center of the plurality of wire pads. Are orthogonal to the line segments connecting
A semiconductor-type light source for a vehicular lamp. The plurality of wire pads are located on the middle line of the two adjacent semiconductor light emitting elements and at positions equidistant from the two adjacent semiconductor light emitting elements.
The semiconductor-type light source of the vehicular lamp according to claim 1. The surrounding wall member is provided with a reflecting surface that reflects light from the plurality of semiconductor light emitting elements.
The semiconductor-type light source of the vehicular lamp according to claim 1 or 2. A socket portion formed by combining an insulating member, a heat radiating member, and a power feeding member;
The semiconductor-type light source of the vehicular lamp according to any one of claims 1 to 3, which is attached to the socket portion,
Comprising
A semiconductor-type light source unit for a vehicular lamp. A lamp housing and a lamp lens that partition the lamp chamber;
A semiconductor-type light source unit for a vehicular lamp according to claim 4,
With
The socket portion is attached to the lamp housing, and the semiconductor light source is disposed in the lamp chamber;
A vehicular lamp characterized by the above.

Images