JP2014175085A - Light emitting device and vehicular lighting system - Google Patents

Abstract

Provided is a light emitting device capable of suppressing unevenness in light emitted from an illumination device for a vehicle and deterioration in design of the appearance of a lamp.
A light-emitting device according to an embodiment is disposed inside a lamp 110 (having a reflector 111 having a reflector reflecting surface 111a and a light transmitting portion 112) of a vehicle lighting device 100, and includes a socket portion 2 and a light-emitting portion. 3, a light emitting portion 41, and a lid portion 4. The light emitting unit 3 is housed in the housing unit 21 of the socket unit 2 and includes a light emitting element 31. The light emitting unit 41 radiates light emitted from the light emitting element 31 toward the lamp 110. The lid 4 is formed with a lid reflecting surface 42 that reflects the light emitted from the light emitting part 41 and reflected by the lamp 110, and closes the storage part 21 of the socket part 2. When the reflectance A (λ) of the reflector reflecting surface 111a at the wavelength λ of light and the reflectance B (λ) of the lid reflecting surface 42 are set, B (λ ) ≧ A (λ) × 0.7.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to a light emitting device and a vehicle lighting device.

  In recent years, light emitting devices using light emitting elements as light sources have begun to be used in vehicle lighting devices, such as front combination lights and rear combination lights. When using a light-emitting element as a light-emitting device, heat countermeasures for the light-emitting element are important items. This is because the light emitting element has a characteristic that the light emission efficiency is lowered as the temperature of the element itself increases. In particular, since the lighting device for vehicles is mounted on a vehicle, it is required to maintain its function in a use environment from a low temperature environment of −40 ° C. to a high temperature environment of 85 ° C., and heat countermeasures under a high temperature environment are important. It becomes. Some vehicle lighting devices use a light-emitting device having a lid formed of a lens, a prism, or the like that covers the substrate including the light-emitting element in order to isolate the substrate on which the light-emitting element is mounted from the outside.

JP 2012-43750 A JP 2012-38698 A

  By the way, when considering the heat dissipation of a light emitting device using a light emitting element as a light source, a heat radiating part such as a heat sink becomes large in order to ensure the heat dissipation. Therefore, when the light emitting device is arranged in a lamp having a reflector or the like in the vehicle lighting device, there is a problem that the proportion of the light emitting device in the lamp increases. For example, when the light transmission part is colorless and transparent, etc., and has transparency, due to the difference in the reflection characteristics of the members constituting the reflector and the light emitting device, in the appearance of the lamp viewed from the outside of the vehicle lighting device There is a risk of adversely affecting the design. In addition, when the light transmission unit, the reflector, or the like has reflectivity, a part of the light emitted from the light emitting device is reflected by the light transmission unit or the reflector and returns to the light emitting device. Due to the difference in the reflectance of the members constituting the light, there is a possibility that unevenness occurs in the light emitted from the lamp, that is, the light emitted from the vehicle lighting device.

  An object of this invention is to provide the light-emitting device which suppresses the nonuniformity in the light irradiated from the illuminating device for vehicles, and the fall of the designability in the external appearance of a lamp.

  The light emitting device according to the embodiment is used for a vehicle lighting device including a reflector having a reflector reflecting surface and a lamp having a light transmission portion, and a light emitting device that emits light into the lamp. The light emitting device includes a socket portion, a light emitting portion, a light emitting portion, and a lid portion. The light emitting part is housed in the housing part of the socket part and has a light emitting element. The light emitting section radiates light from the light emitting element toward the inside of the lamp. The lid portion is formed with a lid portion reflecting surface that reflects light emitted from the light emitting portion and reflected by the lamp, and closes the housing portion of the socket portion. When the reflectance A (λ) of the reflector reflecting surface at the wavelength λ of light and the reflectance B (λ) of the lid reflecting surface are set, B (λ) ≧ A in the wavelength range of light emitted from the light emitting device. (Λ) × 0.7 is satisfied.

  ADVANTAGE OF THE INVENTION According to this invention, the light-emitting device and vehicle lighting device which can suppress that the nonuniformity arises in the light irradiated from the vehicle lighting device and the designability in the external appearance of a lamp can be provided.

Drawing 1 is a mimetic diagram showing the lighting installation for vehicles which has the luminescent device of an embodiment. FIG. 2 is a diagram illustrating the light emitting device according to the embodiment. FIG. 3 is a diagram illustrating a state in which the light emitting device of the embodiment is viewed from the lid side. FIG. 4 is a diagram illustrating a state in which the lid portion of the light emitting device of the embodiment is disassembled. FIG. 5 is a diagram illustrating a relationship between the reflector reflecting surface and the lid reflecting surface. FIG. 6 is a diagram illustrating the relationship between the reflector reflecting surface and the lid reflecting surface.

  A light-emitting device 1 according to an embodiment described below is for a vehicle including: a lamp 111 having a reflector 111 having a reflector reflecting surface 111a and a light transmitting portion 112; and a light-emitting device 1 that emits light into the lamp 110. Used for the lighting device 100. The light emitting device 1 includes a socket part 2, a light emitting part 3, a light emitting part 41, and a lid part 4. The light emitting unit 3 is housed in the housing unit 21 of the socket unit 2 and includes a light emitting element 31. The light emitting unit 41 radiates light from the light emitting element 31 toward the inside of the lamp 110. The lid 4 is formed with a lid reflecting surface 42 that reflects the light emitted from the light emitting part 41 and reflected by the lamp 110, and closes the storage part 21 of the socket part 2. When the reflectance A (λ) of the reflector reflecting surface 111a at the wavelength λ of light and the reflectance B (λ) of the lid reflecting surface 42 are set, B (λ ) ≧ A (λ) × 0.7.

  In the light emitting device 1 according to the embodiment described below, the lid reflection surface 42 is a mirror surface.

  Moreover, as for the light-emitting device 1 which concerns on embodiment described below, the cover part reflective surface 42 is white.

  Moreover, the vehicle lighting device 100 according to the embodiment described below includes the light emitting device 1 and a lamp 110 in which one or more light emitting devices 1 are arranged.

Embodiment
The embodiment will be described with reference to FIGS. Drawing 1 is a mimetic diagram showing the lighting installation for vehicles which has the luminescent device of an embodiment. FIG. 2 is a diagram illustrating the light emitting device according to the embodiment. FIG. 3 is a diagram illustrating a state in which the light emitting device of the embodiment is viewed from the lid side. FIG. 4 is a diagram illustrating a state in which the lid portion of the light emitting device of the embodiment is disassembled. FIG. 5 is a diagram illustrating a relationship between the reflector reflecting surface and the lid reflecting surface. FIG. 6 is a diagram illustrating the relationship between the reflector reflecting surface and the lid reflecting surface. 5 and 6, the vertical axis represents the reflectance [%], and the horizontal axis represents the wavelength λ [nm].

  The light-emitting device of this embodiment is a vehicle lighting device used in a vehicle exterior or the like. The vehicle lighting device of the present embodiment is, for example, a stop lamp, a tail lamp, a turn signal lamp, a fog lamp, and a back lamp that constitute a front combination light, a rear combination light, and the like. As shown in FIG. 1, the vehicular lighting device 100 includes a lamp 110 and a light emitting device 1. The vehicle lighting device 100 has one light emitting device in the present embodiment, but is not limited to this, and may have two or more light emitting devices 1.

  The lamp 110 radiates the light emitted from the light emitting device 1 to the outside with a predetermined light distribution, in the present embodiment, to the outside of the vehicle body (not shown). The lamp 110 includes a reflector 111 and a light transmission part 112. Here, in the vehicular illumination device 100, the light transmitting portion 112 is exposed to the outside of the vehicle, and the reflector 111 and the light emitting device 1 are disposed inside the vehicle.

  The reflector 111 is formed in a concave shape and is disposed so as to surround the light emitting device 1. The inner surface of the reflector 111 is a reflector reflecting surface 111a. The reflector 111 is usually formed of a resin material, and a reflective layer is formed of a reflective material such as aluminum on the inner peripheral surface, so that the reflector reflective surface 111a is a mirror surface. In the reflector 111, an insertion hole 111b for exposing the light emitting device 1 to the inside is formed. In addition, in the insertion hole 111b of the reflector 111, a part of the lid 4 is inserted in the light emitting device 1, in this embodiment, and the gap between the reflector 111 and the light emitting device 1 is sealed by a packing 8 described later.

  The light transmission part 112 is a clear lens formed of a transparent material, in this embodiment, for example, a colorless and transparent resin material, glass or the like, and closes the inside of the reflector 111. Since the light transmission part 112 has transparency, the light radiated from the light emitting device 1, the light L1 reflected by the reflector reflection surface 111a, the light L2 reflected by the lid reflection surface 42 described later, etc. The light passes through the section 112 and is emitted to the outside of the lamp 110, that is, irradiated to the outside of the vehicle lighting device 100.

  As shown in FIGS. 1 to 4, the light emitting device 1 includes a socket portion 2, a light emitting portion 3, a light emitting portion 41, and a lid portion 4. As shown in FIG. 2, the light emitting device 1 includes a light emitting unit 3, a lighting circuit unit 5, and a power feeding connecting unit 6 housed in a housing unit 21 of a socket unit 2, and a lid unit 4 having a light emitting unit 41. The storage unit 21 is closed.

  The socket part 2 accommodates at least the light emitting part 3 and radiates heat from the light emitting part 3. In the socket portion 2, a light emitting portion 3 and components for supplying power to the light emitting portion 3, such as the lighting circuit portion 5, are accommodated in the accommodating portion 21. As shown in FIG. 4, the socket portion 2 incorporates a power supply member 7 that is electrically connected to an external power source (not shown) provided outside the light emitting device 1, for example, a battery (not shown) mounted on the vehicle. Yes. The socket portion 2 is made of a resin material. In this embodiment, as shown in FIG. 2, a main body in which a heat sink 22 made of a metal is made of a resin material in order to improve heat dissipation. Is attached. The socket part 2 and the heat sink 22 may be formed integrally with a highly radioactive resin or the like.

  The light emitting unit 3 emits light and includes a light emitting element 31 mounted on the light emitting element substrate 32. The light emitting element 31 is a semiconductor element that emits light, such as an LED or an LD, and one or more, in the present embodiment, a plurality are mounted in series on the light emitting element substrate 32. As shown in FIG. 1, each light emitting element 31 is electrically connected to a light emitting element substrate 32 through a wire 33. The light emitting unit 3 is provided such that a reflector 34 that reflects light from the light emitting elements 31 surrounds all the light emitting elements 31. The reflector 34 is an inclined surface 34 a whose inner peripheral surface widens from the light emitting element substrate 32 side toward the lid portion 4 side. For the purpose of preventing the light emitting element 31 from being damaged and the wire 33 from being cut, the light emitting unit 3 is filled with a transparent resin in the space formed by the reflector 34 so that the light emitting element 31 is resin-sealed. . As shown in FIG. 2, the light emitting element substrate 32 is formed with element substrate side terminals 36 and 37 which are power supply terminals with which the power supply connection portion 6 contacts. The element substrate side terminals 36 and 37 are formed on the surface on which the light emitting element 31 is mounted (the lid 4 side), and each light emitting element 31 is connected via a wiring (including components such as a resistor) (not shown). And are electrically connected. Here, the light emitting element substrate 32 is fixed to a mount 23 formed in the housing portion 21, and is formed of a material that can easily transfer heat generated by the light emitting element 31, such as metal or ceramic having high thermal conductivity. It is an insulating substrate. Further, the electrical connection between each light emitting element 31 and the element substrate side terminals 36 and 37 may be either in parallel or in series.

  Here, the light emitting unit 3 is electrically connected to the lighting circuit unit 5 via the power supply connecting unit 6. The lighting circuit unit 5 is a substrate for lighting the light emitting element 31, and is a substrate formed separately from the light emitting unit 3. The lighting circuit unit 5 is a drive circuit for the light emitting unit 3 and supplies power to the light emitting unit 3. The lighting circuit unit 5 is formed with a circuit board side terminal (not shown) which is a power supply terminal with which the power supply connection unit 6 contacts. The circuit board side terminals are formed on the bottom side surface of the storage portion 21 opposite to the lid portion 4 side, and are shown in FIG. 4 through wiring (not shown) (including components such as a current limiting resistor). As described above, the power supply member 7 is electrically connected. Here, the lighting circuit unit 5 is fixed to the bottom side of the light emitting unit 3 in the storage unit 21, that is, below the light emitting unit 3, and a heat generating component such as each light emitting element 31 is not mounted. Therefore, the insulating substrate is made of an inexpensive material such as paper phenol, paper epoxy, or glass epoxy.

  In addition, the power supply connection unit 6 electrically connects the light emitting unit 3 and the lighting circuit unit 5. In the present embodiment, between the element substrate side terminal 36 and one circuit substrate side terminal, the element substrate side terminal 37 and the other. The circuit board side terminals are electrically connected to each other. The power supply connection portion 6 is disposed above the light emitting portion 3 and the lighting circuit portion 5 and is an elastic material, for example, a conductive leaf spring. The power supply connecting portion 6 is electrically connected to one of the light emitting portion 3 and the lighting circuit portion 5 by being fixed, and is electrically contacted to the other in an elastically deformed state.

  The lid portion 4 closes the storage portion 21 of the socket portion 2 and is fixed to the socket portion 2 via a packing 8 made of an elastic material. That is, the packing 8 can prevent the external atmosphere from entering from the portion fixed to the socket portion 2 of the lid portion 4. Here, the fixing part (not shown) is formed on the lid 4, and the light-emitting device 1 is fixed to the reflector 111 of the lamp 110 that is a lighting device fixing target for fixing the light-emitting device 1. Fixed against. The lid portion 4 is formed with a light emitting portion 41 and a lid portion reflecting surface 42.

  The light emitting unit 41 allows light from the light emitting element 31 to pass outside the light emitting device 1. As shown in FIG. 1, the light emitting portion 41 is formed at a position facing the light emitting portion 3 in the thickness direction of the lid portion 4 (up and down direction of the light emitting device 1). The light emitting portion 41 functions as a vent that allows the storage portion 21 to communicate with the outside. Here, when the lid portion 4 is fixed to the socket portion 2, the light emitting portion upper surface 3 a that is the end surface of the light emitting portion 3 on the light emitting portion 41 side overlaps the light emitting portion 41 in the thickness direction of the lid portion 4. Is set to Further, the light emitting unit upper surface 3 a is set so as to be positioned on the light emitting unit 3 side with respect to the lid unit upper surface 4 a that is the end surface of the lid unit 4 on the side opposite to the light emitting unit 3 side. That is, when the lid part 4 is fixed to the socket part 2, the light emitting part 3 does not protrude from the light emitting part 41, and the light emitting part upper surface 3 a is accommodated in the light emitting part 41. Therefore, it is possible to prevent an operator or a peripheral member from inadvertently contacting the light emitting unit 3 when the light emitting device 1 is assembled, inspected, or attached to the lighting device fixing target. Thereby, damage of the light emission part 3 can be suppressed and durability can be improved. Further, since the light emitting unit upper surface 3 a is in the light emitting unit 41, a part of the light emitting unit 3 that is a heat generation source of the light emitting device 1 is located in the light emitting unit 41 communicating with the outside, and thus to the storage unit 21. Therefore, the heat dissipation can be further improved.

  The light emitting part 41 is formed larger than the outer periphery of the light emitting part 3. In the present embodiment, the light emitting portion 41 is formed in a circle having a larger diameter Ds than the diameter Dr of the outer periphery of the reflector 34 formed in a circle of the light emitting portion 3. That is, the gap 4 is formed in the lid portion 4 with respect to the light emitting portion 3 when viewed from the thickness direction. Here, there is a play in fixing the socket part 2 and the lid part 4, and the lid part 4 may move with respect to the socket part 2 in a horizontal plane perpendicular to the thickness direction. In this case, the light emitting portion 41 is formed in such a size that the light emitting portion 3 does not contact the lid portion 4 when viewed from the thickness direction even when the lid portion 4 moves relative to the socket portion 2. Therefore, since the gap S is formed, even when a part of the light emitting unit 3 is in the light emitting unit 41, it is possible to ensure a communication state between the storage unit 21 and the outside. Thereby, since the heat in the accommodating part 21 can be discharge | released outside via the light emission part 41, the heat dissipation effect can be enlarged. Further, the gap S is not interrupted even when the lid portion 4 moves with respect to the socket portion 2, that is, the lid portion 4 does not come into contact with the light emitting portion 3. By fixing 4 to the lamp 110, it is possible to prevent a part of the weight of the light emitting device 1 excluding the lid 4 from being received between the lid 4 and the light emitting unit 3. Thereby, damage of the light emission part 3 can be suppressed and durability can be improved.

  The light emitting portion 41 is configured by an inclined surface 41a whose inner peripheral surface widens from the light emitting portion 3 side to the opposite side, that is, the lid portion 4 side. Here, the opening angle α which is an angle in a cross section including the thickness direction of the lid portion 4 of the inclined surface 41 a is set to be equal to or larger than the half-value angle β of the light intensity of the light emitting portion 3. The half-value angle β is an opening angle that is 0.5 (half-value) when the intensity of light emitted from the light emitting unit 3 at an opening angle of 0 degrees is 1. Here, the opening angle α is a plus / minus direction centering on an opening angle of 0 degree, and is about 120 degrees in the present embodiment, for example, but the half-value angle β varies depending on the characteristics of the light emitting unit 3. . The inclined surface 41a is preferably set to be larger than the inclination angle of the inclined surface 34a on the inner peripheral surface of the reflector 34. Thereby, it can suppress that the light radiated | emitted from the light emission part 3 is light-shielded by the inclined surface 41a which comprises the light emission part 41. FIG. The inclined surface 41a, which is the inner peripheral surface constituting the light emitting portion 41, may be a reflective surface that is totally reflected or diffusely reflected by forming a reflective layer of a reflective material such as aluminum. In this case, among the light emitted from the light emitting unit 3, the light emitting unit 41 is reflected by the light emitted from the inclined surface 41a without passing through the light emitting unit 41 and extracted outside. It can pass through and radiate to the outside, and high efficiency can be maintained. Moreover, since the inclined surface 41a is a reflective surface, the light distribution angle of the light radiated | emitted outside the light-emitting device 1 can be adjusted by adjusting the inclined surface 41a to linear shape or curved shape. Therefore, the light distribution angle of the light irradiated to the outside of the light emitting device 1 can be adjusted without providing a light distribution adjusting member such as an optical component inside or outside the light emitting portion 41. Moreover, although the light emission part 41 is an opening in this embodiment, it is not limited to this, The member which has the transparency which obstruct | occludes an opening may be sufficient.

As shown in FIGS. 1 and 3, the lid reflecting surface 42 reflects light emitted from the light emitting portion 41 and reflected by the lamp 110. In this embodiment, the lid reflection surface 42 is the lid upper surface 4a that faces the light transmission part 112 of the lamp 110. The lid 4 is usually formed of a resin material, and the lid reflective surface 42 is a mirror surface by forming a reflective layer on the lid upper surface 4a with a reflective material such as aluminum. The lid reflection surface 42 may include not only the lid upper surface 4a but also a lid side surface 4b extending from the outer periphery of the lid upper surface 4a to the socket 2 side. Here, the lid reflecting surface 42 is radiated from the light emitting device 1 when the reflectance A (λ) of the reflector reflecting surface 111a and the reflectance B (λ) of the lid reflecting surface 42 at the wavelength λ of light are used. In the wavelength range R of the light to be satisfied, the relationship of the following formula (1) is satisfied.
B (λ) ≧ A (λ) × 0.7 (1)

  Here, the wavelength range R of light emitted from the light emitting device 1 refers to the wavelength range of light from the light emitting element 31 when there is no interposing member such as a reflecting member or a transmitting member on the optical path, and there is an interposing member. In this case, it refers to the wavelength range of light emitted from the interposition member exposed to the outside of the light emitting device 1. In this embodiment, since the light emission part 41 is an opening, it becomes the wavelength range of the light radiated | emitted from the light emission part 3. FIG. For example, as shown in FIG. 5, when the wavelength range R of the light emitted from the light emitting unit 3 is in the visible light region (about 380 nm to 780 nm), in this embodiment, the lid reflection surface 42 is a mirror surface. In the entire visible light region, the reflectance B (λ) of the lid reflecting surface 42 can be 0.7 times or more the reflectance A (λ) of the reflector reflecting surface 111a.

The reflectance B (λ) is 0.7 times the reflectance A (λ), that is, the threshold BL (= A × 0.7) or more is less than 0.7 times. Since the reflectance B (λ) of the lid reflection surface 42 inside becomes too lower than the reflectance A (λ) of the reflector reflection surface 111a, the luminance of the lid reflection surface 42 with respect to the luminance of the reflector reflection surface 111a. This is because the brightness unevenness becomes low as a result. Note that the relationship between the reflectance A (λ) and the reflectance B (λ) is preferably the following equation (2). When the expression (2) is satisfied, the design of the appearance of the lamp 110 viewed from the outside of the vehicle lighting device 100 is further improved.
B (λ) ≧ A (λ) × 0.85 (2)

  Next, operation | movement of the illuminating device 100 for vehicles is demonstrated. The light emitting device 1 is fixed to a lamp 110 fixed to the vehicle, and the power feeding member 7 is electrically connected to an external power source. When the supply of power from the external power source is started, the power from the external power source supplied to the lighting circuit unit 5 through the power supply member 7 is supplied to the light emitting element substrate 32 through the power supply connection unit 6, and each light emission. When the element 31 emits light by the supplied power, the light emitting unit 3 emits light, and the light emitting device 1 is turned on. As shown in FIG. 1, the light emitted from the light emitting unit 3 is emitted to the outside of the light emitting device 1, that is, the interior of the lamp 110 via the light emitting unit 41. The light radiated into the lamp 110 is radiated directly to the outside of the vehicle lighting device 100 via the light transmissive part 112 (L3 shown in the figure), and radiated to the light transmissive part 112 and the reflector reflecting surface 111a. Reflected. The light reflected inside the lamp 110 is reflected by the reflector reflecting surface 111a as a result, and is radiated to the outside of the vehicle lighting device 100 (L1 shown in the figure), and is reflected by the lid reflecting surface 42. Thus, the vehicle illumination device 100 is radiated to the outside (L2 shown in the figure), and the vehicle illumination device 100 is turned on.

  As described above, the light emitting device 1 and the vehicle lighting device 100 according to the present embodiment reflect the reflectance B (λ) of the lid reflecting surface 42 in the reflector range in the wavelength range R of the light emitted from the light emitting device 1. Since the reflectance A (λ) of the surface 111a is 0.7 times (threshold value BL) or more, as shown in FIG. 5, the reflectance B1 of the lid portion 4 where the lid portion upper surface 4a is less than the threshold value BL. Compared to the case of (λ), in the entire wavelength range R, the reflectance B (λ) is closer to the reflectance A (λ). Accordingly, since the reflectance B (λ) of the lid reflecting surface 42 is significantly lower than the reflectance A (λ) of the reflector reflecting surface 111a, the luminance of the lid reflecting surface 42 with respect to the luminance of the reflector reflecting surface 111a. Can be reduced. As a result, uneven brightness within the lamp 110 can be suppressed, and unevenness occurs in the light emitted from the vehicular illumination device 100. For example, the interior of the vehicular illumination device 100, that is, the interior of the lamp 110 is externally generated. When it sees, it can suppress that a part becomes dark.

  Here, as shown in FIG. 6, the reflectance B2 (λ) of the lid reflecting surface 42 is remarkably larger than the reflectance A (λ) of the reflector reflecting surface 111a in a part of the light wavelength range R. When the reflectance of blue, for example, the reflectance of blue is significantly lower than the reflectance of red or green with respect to the reflectance A (λ) of the reflector reflecting surface 111a, the lid reflecting surface with respect to the light reflected by the reflector reflecting surface 111a The light reflected by 42 appears to be discolored, and color unevenness occurs. However, in the light emitting device 1 and the vehicle lighting device 100 according to the present embodiment, the reflectance B (λ) is close to the reflectance A (λ) in the entire wavelength range R. Discoloration of the light reflected by the lid reflecting surface 42 with respect to the reflected light can be suppressed. As a result, color unevenness inside the lamp 110 can be suppressed, and unevenness occurs in the light emitted from the vehicle illumination device 100. For example, the interior of the vehicle illumination device 100 from the outside, that is, the interior of the lamp 110 is generated. When viewed, it is possible to suppress a partial discoloration.

  Further, since the reflectance A (λ) and the reflectance B (λ) are close to each other, the appearance of the reflector reflecting surface 111a and the lid reflecting surface 42 is close, so that the light emitting device 1 is larger than the lamp 110, and the lamp Even if the ratio of the light emitting device 1 in 110 is large, the light emitting device 1 can be made inconspicuous inside the lamp 110. Therefore, it is possible to suppress an adverse effect on the design of the internal appearance of the lamp 110 viewed from the outside of the vehicle lighting device 100, and the design can be improved. In particular, if the light transmitting portion 112 is colorless and transparent, the internal appearance of the lamp 110 can be easily visually recognized from the outside of the vehicular lighting device 100, and therefore, it is possible to suppress further adverse effects on the design. The design can be improved.

  In addition, since the reflector reflecting surface 111a and the lid reflecting surface 42 are mirror surfaces, the reflectance B (λ) is further closer to the reflectance A (λ), so that the light emitted from the vehicular illumination device 100 can be reduced. Generation of unevenness can be further suppressed. In addition, the light emitting device 1 can be made less noticeable inside the lamp 110, and it is possible to further suppress adverse effects on the design of the internal appearance of the lamp 110 viewed from the outside of the vehicle lighting device 100. The design property can be further improved.

  In the above embodiment, the lid reflection surface 42 is a mirror surface. However, the present invention is not limited to this. The reflectance B (λ) of the lid reflection surface 42 is the reflectance A (λ of the reflector reflection surface 111a. ) 0.7 times or more. Therefore, for example, the lid reflection surface 42 may be white. When the lid reflection surface 42 is white, the light emitted to the lid reflection surface 42 is diffusely reflected inside the lamp 110. Thereby, since the reflective characteristic in the lamp 110 can be changed, the light distribution characteristic of the illuminating device 100 for vehicles can be controlled. Further, by making the lid reflection surface 42 different from the reflector reflection surface 111a, the appearance of the lamp 110 viewed from the outside of the vehicle lighting device 100 is positively influenced, thereby improving the design. Can do.

  Moreover, in the said embodiment, although the wavelength range R of the light radiated | emitted from the light-emitting device 1 was made into the visible light region, it is not limited to this. For example, the vehicle lighting device 100 has different wavelengths (λ) depending on the application, such as red for stop lamps and tail lamps, orange for turn signal lamps, white and yellow for fog lamps, and white for back lamps. Therefore, when the light emitted from the light emitting device 1 is set to a wavelength (λ) obtained in advance, the wavelength range R of the light emitted from the light emitting device 1 is a wavelength (λ) obtained depending on the use of the vehicle lighting device 100. It becomes.

  Moreover, in the said embodiment, the reflectance B ((lambda)) of the cover part reflective surface 42 is 0 of the reflectance A ((lambda)) of the reflector reflective surface 111a in the whole wavelength range R of the light radiated | emitted from the light-emitting device 1. FIG. Although it is set to be 7 times or more, it may be a partial region of the wavelength range R. Thereby, it is possible to prevent the light with an arbitrary wavelength (λ) from being radiated from the vehicle lighting device 100 in the wavelength range R of the light emitted from the light emitting device 1. It is possible to control the color of light emitted from the light source.

  Moreover, in the said embodiment, although the light emitting element board | substrate 32 and the lighting circuit part 5 were divided and electrically connected by the electric power feeding connection part 6, it is not limited to this, A light emitting element is used as one board | substrate. 31 may be mounted and the light emitting element 31 may be turned on. Moreover, in the said embodiment, although the reflector 34 is provided in the light emission part 3, and each light emitting element 31 is resin-sealed 35, it is not limited to this, Either the reflector 34 or the resin sealing 35 is used. There may be no one.

  In the above embodiment, the vehicular lighting device 100 has been described. However, the lamp 110 having the reflector 111 having the reflector reflecting surface 111a and the light transmitting portion 112, and the light emitting device 1 that emits light into the lamp 110 are provided. If it has, it may be an LED lighting device.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 Socket part 21 Storage part 3 Light-emitting part 31 Light-emitting element 4 Cover part 41 Light emission part 41a Inclined surface 42 Cover part reflective surface 5 Lighting circuit part 6 Electric power supply connection part 7 Electric power supply member 8 Packing 100 Vehicle illumination device 110 Lamp 111 reflector 111a reflector reflecting surface 112 light transmitting portion

Claims (4)

A light-emitting device used in a vehicular lighting device, comprising: a reflector having a reflector reflecting surface; a lamp having a light transmission portion; and a light-emitting device that emits light inside the lamp,
The light emitting device
Socket part,
A light emitting part housed in a housing part of the socket part and having a light emitting element;
A light emitting section for emitting light from the light emitting element toward the interior of the lamp;
A lid part reflecting surface that reflects light emitted from the light emitting part and reflected by the lamp, and a lid part that closes the housing part of the socket part;
Have
When the reflectance A (λ) of the reflector reflecting surface at the wavelength λ of the light and the reflectance B (λ) of the lid reflecting surface are set, the wavelength range of light emitted from the light emitting device is as follows. A light-emitting device that satisfies the relationship of formula (1).
B (λ) ≧ A (λ) × 0.7 (1) The light-emitting device according to claim 1.
The light emitting device, wherein the lid reflection surface is a mirror surface. The light-emitting device according to claim 1.
The light emitting device, wherein the lid reflecting surface is white. The light emitting device according to any one of claims 1 to 3,
The lamp in which one or more of the light emitting devices are disposed;
A vehicular lighting device having

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