JP2013137979A - Vehicular lighting lamp - Google Patents

Vehicular lighting lamp Download PDF

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Publication number
JP2013137979A
JP2013137979A JP2012040760A JP2012040760A JP2013137979A JP 2013137979 A JP2013137979 A JP 2013137979A JP 2012040760 A JP2012040760 A JP 2012040760A JP 2012040760 A JP2012040760 A JP 2012040760A JP 2013137979 A JP2013137979 A JP 2013137979A
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Japan
Prior art keywords
light
translucent
distribution pattern
lamp
incident
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Granted
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JP2012040760A
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Japanese (ja)
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JP5975674B2 (en
Inventor
Tomoaki Otani
友昭 大谷
Naoki Uchida
直樹 内田
Hiroki Kawai
宏樹 河合
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Koito Mfg Co Ltd
株式会社小糸製作所
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Priority to JP2011260242 priority Critical
Priority to JP2011260242 priority
Application filed by Koito Mfg Co Ltd, 株式会社小糸製作所 filed Critical Koito Mfg Co Ltd
Priority to JP2012040760A priority patent/JP5975674B2/en
Priority claimed from US13/688,689 external-priority patent/US9340147B2/en
Publication of JP2013137979A publication Critical patent/JP2013137979A/en
Publication of JP5975674B2 publication Critical patent/JP5975674B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10Arrangement or contour of the emitted light
    • F21W2102/17Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Abstract

In a vehicular illumination lamp configured to emit light from a light emitting element to the front of a lamp by a translucent member disposed on the front side of the light emitting element, a thin lamp configuration is provided, and the irradiation light is used. In addition to forming the low beam light distribution pattern, the OHS irradiation light distribution pattern can be formed at a position away from the cut-off line.
Light from a light emitting element 12 is internally reflected by a front surface 14a of a translucent member 14, and then is internally reflected again by a rear surface 14b and emitted from the front surface 14a. At that time, from the light emitting element 12 incident on the translucent member 14, the OHS irradiation light distribution pattern is formed on the front surface 14 a of the translucent member 14 at a position away from the cutoff line of the low beam light distribution pattern. A lens portion 14c that emits part of the light as upward direct light toward the front of the lamp is formed. As a result, it is possible to easily irradiate overhead signs installed above the road surface in front of the vehicle.
[Selection] Figure 2

Description

  The present invention relates to a vehicular illumination lamp configured to emit light from a light emitting element such as a light emitting diode to the front of the lamp by a translucent member disposed on the front side thereof.

  Conventionally, a light distribution pattern having a cut-off line at the upper end portion is formed by emitting light from a light emitting element arranged toward the front of the lamp to the front of the lamp by a translucent member arranged on the front side thereof. A vehicular illumination lamp configured as described above is known.

  In “Patent Document 1”, as such a vehicular illumination lamp, light emitted from a light emitting element is incident on a translucent member and internally reflected on the front surface thereof, and then internally reflected again on the rear surface thereof. A configuration in which light is emitted from the front surface is described.

  In that case, in the vehicular illumination lamp described in “Patent Document 1”, the front surface of the translucent member is configured to be a flat surface, and the outer peripheral side of the light incident area on which light from the light emitting element is incident on the rear surface. The annular region located at is composed of a plurality of curved surfaces, and the annular region is subjected to a reflection process.

JP 2011-1000069 A2

  By adopting the configuration described in “Patent Document 1”, it is possible to form a light distribution pattern having a cut-off line at the upper end portion after the vehicle illumination lamp is configured to be thin. The light distribution pattern can be used as a light distribution pattern for low beam or a light distribution pattern constituting a part thereof.

  By the way, it is preferable that a light distribution pattern for irradiating an overhead sign placed above the road surface in front of the vehicle is additionally formed as a low beam light distribution pattern. With the described configuration, it is difficult to form a light distribution pattern for irradiating an overhead marker at a position away from the cut-off line of the low beam light distribution pattern.

  The invention of the present application has been made in view of such circumstances, and is a vehicular illumination lamp configured to emit light from a light emitting element to the front of the lamp by a translucent member disposed on the front side thereof. The first light distribution pattern having a cut-off line at the upper end portion is formed by the irradiation light, and the second light distribution pattern is formed at a position away from the cut-off line. An object of the present invention is to provide a vehicular illumination lamp that can be formed.

  In the present invention, the above-described object is achieved by devising the configuration of the translucent member.

That is, the vehicular illumination lamp according to the first invention of the present application is:
A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured with a flat surface, and the annular region located on the outer peripheral side of the light incident region where the light from the light emitting element is incident on the rear surface of the translucent member is configured with a plurality of curved surfaces. ,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element incident on the translucent member is directed forward of the lamp so that a second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line. And a lens portion that emits light as upward direct light.

Moreover, the vehicular illumination lamp according to the second invention of the present application is:
A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured by a rotating curved surface having a concave curved surface portion at the center, and an annular region located on the outer peripheral side of the light incident region on the rear surface of the translucent member on which light from the light emitting element is incident. It consists of multiple curved surfaces,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element incident on the translucent member is directed forward of the lamp so that a second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line. And a lens portion that emits light as upward direct light.

  As long as the “light emitting element” is arranged toward the front of the lamp, the specific shape and size of the light emitting surface are not particularly limited.

  As long as the “first light distribution pattern” is a light distribution pattern having a cut-off line at the upper end, the specific shape is not particularly limited, and may be a low beam light distribution pattern. Or a light distribution pattern constituting a part thereof.

  If the “annular region” is configured so that the first light distribution pattern can be formed by the light that has been internally reflected again by the annular region, each of the plurality of curved surfaces constituting the annular region is specific. The specific surface shape and arrangement are not particularly limited.

  As long as the “second light distribution pattern” is a light distribution pattern formed at a position away from the cut-off line of the first light distribution pattern, its specific shape and formation position are particularly limited. It is not a thing.

  The specific arrangement of the “lens portion” is not particularly limited as long as it is provided on the surface of the light transmitting member. In addition, the “lens portion” may be configured integrally with the translucent member or may be configured separately.

  As shown in the above configuration, the vehicular illumination lamp according to the first invention of the present application is configured such that light from a light emitting element disposed toward the front of the lamp is incident on a translucent member disposed on the front side thereof. The inner surface is reflected on the front surface, and then the inner surface is reflected again on the rear surface to be emitted from the front surface. The translucent member is configured to have a flat front surface and light incident on the rear surface. An annular region located on the outer periphery of the region is composed of a plurality of curved surfaces, and this annular region is subjected to reflection treatment, so the vehicle lighting fixture is made thin and cut off at the upper end. The 1st light distribution pattern which has can be formed.

  In addition, in the vehicular illumination lamp according to the first invention of the present application, the second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line of the first light distribution pattern. Since the lens unit that emits part of the light from the light emitting element incident on the light transmitting member as upward direct light toward the front of the lamp is provided, the overhead installed above the road surface in front of the vehicle It is possible to easily irradiate the label.

  The vehicular illumination lamp according to the second invention of the present application causes light from a light emitting element arranged toward the front of the lamp to be incident on a translucent member arranged on the front side and to be internally reflected on the front surface thereof. Then, the rear surface is again reflected from the inner surface and emitted from the front surface, but the translucent member is formed of a rotating curved surface having a concave curved surface portion in the center, and the rear surface. The annular region located on the outer peripheral side of the light incident region in FIG. 2 is composed of a plurality of curved surfaces, and the annular region is subjected to reflection treatment, so that the upper end portion of the vehicle illumination lamp is configured thinly A first light distribution pattern having a cut-off line can be formed.

  In addition, in the vehicular illumination lamp according to the second invention of the present application, the second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line of the first light distribution pattern. Since the lens unit that emits part of the light from the light emitting element incident on the light transmitting member as upward direct light toward the front of the lamp is provided, the overhead installed above the road surface in front of the vehicle It is possible to easily irradiate the label.

  As described above, according to the present invention, in the vehicular illumination lamp configured to emit the light from the light emitting element to the front of the lamp by the translucent member disposed on the front side, the thin lamp configuration is provided. Thus, the first light distribution pattern having a cutoff line at the upper end portion can be formed by the irradiation light, and the second light distribution pattern can be formed at a position away from the cutoff line.

  In the above configuration, if a reflection process is performed on the central region of the front surface of the translucent member, more light can be internally reflected toward the rear surface of the translucent member.

  In particular, in the second invention of the present application, since the front surface of the translucent member is constituted by a rotating curved surface having a concave curved surface portion at the center, the total reflection area on the front surface is larger than that of a flat surface. . For this reason, the magnitude | size of the center area | region where the reflection process is performed can be made small. Accordingly, it is possible to increase the range of the annular region where the reflection treatment is performed on the rear surface of the translucent member to the inner peripheral side, and to effectively use light.

  In this way, when the front surface of the translucent member is composed of a rotating curved surface having a concave curved surface portion at the center, the lens portion is formed in the light incident area on the rear surface of the translucent member, and the translucent member If the part where the light from the light emitting element incident from the lens part reaches in the central region of the front surface of the lens is configured as a non-reflective processing part that has not been subjected to the reflection process, the projecting part on the translucent member The above-described effects can be obtained without providing the above.

  At this time, not all of the light from the light emitting element that has been internally reflected in the central region reaches the annular region on the rear surface. Is set at a position that does not go to the annular region, it is possible to obtain upward direct light for forming the second light distribution pattern without reducing the inner surface reflected light toward the annular region. .

  In the above configuration, when the lens portion is formed on the front surface of the translucent member, the following operational effects can be obtained.

  That is, in the first invention of the present application, since the front surface of the translucent member is a flat surface, it is possible to easily form the lens portion with high accuracy by forming the lens portion on the front surface. On the other hand, in the second invention of the present application, since the front surface of the translucent member is constituted by a rotating curved surface having a concave curved surface portion at the center, even if a lens portion is formed on this front surface, It is possible to easily maintain the thin lamp structure by suppressing the forward protrusion amount.

  In this case, the formation position of the lens portion on the front surface of the translucent member is not particularly limited, but a reflection process is performed on the central region of the front surface of the translucent member, and a part of the central region is not covered. By configuring as a reflection processing unit and forming a lens unit in the non-reflection processing unit, the following operational effects can be obtained.

  That is, as described above, by performing a reflection treatment on the central region of the front surface of the translucent member, more light can be internally reflected toward the rear surface of the translucent member. When the lens portion is formed on the outer peripheral side portion of the central region on the front surface, the inner surface reflection toward the rear surface of the translucent member is not performed in the portion where the lens portion is formed, and the light is accordingly increased. Use efficiency will fall.

  On the other hand, as described above, all of the light from the light-emitting element that has been internally reflected in the central region does not reach the annular region on the rear surface, so the arrangement of the non-reflective processing portion in the central region should be selected appropriately. Thus, upward direct light for forming the second light distribution pattern can be obtained without reducing the inner surface reflected light toward the annular region.

Front view showing a vehicular illumination lamp according to an embodiment of the first invention of the present application II-II sectional view of FIG. The perspective view which shows the translucent member of the said illumination lamp for vehicles Detailed view of the IV section in FIG. The figure which shows transparently the light distribution pattern for low beams formed on the virtual vertical screen arrange | positioned in the position of 25 m ahead of a lamp | ramp by the light irradiated ahead from the said vehicle lighting lamp. The same figure as FIG. 4 which shows the 1st modification of the said embodiment. The perspective view which shows the principal part of the translucent member of the said 1st modification. The same figure as FIG. 2 which shows the 2nd modification of the said embodiment. The figure similar to FIG. 2 which shows the vehicle lighting device which concerns on one Embodiment of this-application 2nd invention The figure similar to FIG. 6 which shows the illumination lamp for vehicles which concerns on the 1st modification of one Embodiment of this invention 2nd invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an embodiment of the first invention of the present application will be described.

  FIG. 1 is a front view showing a vehicular illumination lamp 10 according to the present embodiment. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in these drawings, the vehicular illumination lamp 10 according to the present embodiment is a lamp unit disposed at the front end portion of the vehicle, and in front of the lamp near the point A on the optical axis Ax extending in the front-rear direction of the lamp. The light-emitting element 12 disposed toward the light-emitting element, the translucent member 14 disposed on the front side of the lamp with respect to the light-emitting element 12, a metal support plate 16 that supports the light-emitting element 12, and the support plate 16 It has a configuration including a metal heat sink 18 fixed to the rear surface.

  The vehicular illumination lamp 10 causes the light emitted from the light emitting element 12 to be incident on the light transmitting member 14 and internally reflected by the front surface 14 a of the light transmitting member 14, and then the rear surface 14 b of the light transmitting member 14. Then, the light is again reflected from the inner surface and emitted from the front surface 14a of the translucent member 14, thereby forming a light distribution pattern for low beam distribution PL of left light as shown in FIG.

  The light emitting element 12 is a white light emitting diode, and includes four light emitting chips 12a arranged in a row in a horizontal direction so as to have a horizontally long rectangular shape, and a substrate 12b that supports them.

  The four light emitting chips 12a are arranged so as to be in close contact with each other, and the front surfaces thereof are sealed with a thin film, thereby constituting a light emitting surface that emits light in a horizontally long rectangular shape when viewed from the front of the lamp. . At this time, each light emitting chip 12a has a square outer shape of about 1 × 1 mm, and thus the light emitting surface has an outer shape of about 1 × 4 mm.

  The light emitting element 12 has the lower end edge of the light emitting surface positioned on a horizontal line orthogonal to the optical axis Ax at the point A, and the end point on the own lane side (right side in the front view of the lamp) at the lower end edge. It is arranged so as to be located on the own lane side with respect to the axis Ax and in the vicinity of the optical axis Ax (specifically, for example, a position about 0.3 to 1.0 mm away from the optical axis Ax).

  FIG. 3 is a perspective view showing the translucent member 14.

  As shown in the figure, the translucent member 14 is made of a transparent synthetic resin molded product such as an acrylic resin molded product, and has a circular outer shape when viewed from the front of the lamp. At this time, the outer diameter dimension of the translucent member 14 is set to a value of about φ100 mm.

  The front surface 14a of the translucent member 14 is configured by a plane orthogonal to the optical axis Ax, and the central region 14a1 is subjected to a reflection process such as aluminum vapor deposition, whereby a reflection film 22 is formed. Yes.

  This central region 14a1 is a circular region centered on the optical axis Ax, and the position of the outer peripheral edge is the light from the light emitting element 12 that has reached the front surface 14a of the translucent member 14 (more precisely, from the point A). The incident angle of light is set in the vicinity of the critical angle. As a result, the light from the light emitting element 12 that has reached the front surface 14a of the translucent member 14 is internally reflected by the reflection surface that has been subjected to the reflection treatment in the central region 14a1, and is more peripheral than the central region 14a1. In the peripheral region 14a2 located on the side, the inner surface is reflected by total reflection.

  On the other hand, the rear surface 14b of the translucent member 14 includes a light incident region 14b1, a planar region 14b2, and an annular region 14b3.

  The light incident region 14b1 is a region located in the vicinity of the optical axis Ax, and is formed so as to surround the point A in a hemispherical shape from the front side of the lamp, so that the emitted light from the point A is not refracted. It is made to enter into the translucent member 14.

  The planar region 14b2 is a region surrounding the light incident region 14b1 in an annular shape so as to be adjacent to the outer peripheral side of the light incident region 14b1, and is configured by a plane orthogonal to the optical axis Ax. The heat sink 18 is fixedly supported by the translucent member 14 in the planar region 14b2. The heat sink 18 has a configuration in which a plurality of heat radiating fins 18a are formed on the rear surface thereof.

  The annular region 14b3 is a region that annularly surrounds the planar region 14b2 so as to be adjacent to the outer peripheral side of the planar region 14b2, and is configured by a plurality of curved surfaces. At this time, each of the plurality of curved surfaces is formed with a rotational paraboloid with the optical axis Ax as the central axis as a reference plane and a position that is plane-symmetric with respect to the point A with respect to the front surface 14a of the translucent member 14. Has been.

  The annular region 14b3 is subjected to a reflection process such as aluminum vapor deposition, whereby a reflection film 24 is formed. And the light from the light emitting element 12 internally reflected by the front surface 14a of the translucent member 14 is again internally reflected in the annular region 14b3.

  The plurality of curved surfaces constituting the annular region 14b3 are a reflection region Z1 located on the upper right side of the optical axis Ax (upper left in the lamp front view, the same applies hereinafter), a reflection region Z2 located on the upper side of the optical axis Ax, A reflection region Z3 located on the upper left side of the optical axis Ax, a reflection region Z4 located on the left side of the optical axis Ax, a reflection region Z5 located on the lower left side of the optical axis Ax, and a lower side of the optical axis Ax The area is divided into a reflection area Z6, a reflection area Z7 located on the lower right side of the optical axis Ax, and a reflection area Z8 located on the right side of the optical axis Ax.

  FIG. 4 is a detailed view of the IV portion of FIG.

  As shown also in the drawing, a position relatively close to the optical axis Ax directly above the optical axis Ax in the central region 14a1 of the front surface 14a of the translucent member 14 is a non-reflective processing unit in which the reflective film 22 is not formed. Is formed. The non-reflective processing part is formed with a lens part 14c that emits a part of the light from the light emitting element 12 incident on the translucent member 14 as direct light slightly upward toward the front of the lamp.

  The lens portion 14c is formed in a horizontally long outer shape so as to protrude from the front surface 14a, and has a substantially spherical surface shape. The lens portion 14c has a part of the light from the light emitting element 12 incident on the translucent member 14 as diffused light that slightly diffuses slightly upward in the vertical direction and to some extent on the left and right sides in the horizontal direction. It is configured to emit as diffused light.

  FIG. 5 is a perspective view showing a low beam light distribution pattern PL formed on a virtual vertical screen disposed at a position 25 m ahead of the lamp by light irradiated forward from the vehicular illumination lamp 10.

  As shown in the figure, this low beam light distribution pattern PL is a left light distribution light beam distribution pattern as described above, and has horizontal and oblique cut-off lines CL1 and CL2 at the upper end thereof. . At that time, a horizontal cut-off line CL1 is formed on the opposite lane side with respect to the V-V line that is a vertical line passing through HV that is a vanishing point in the front direction of the vehicle, and an oblique cut-off line CL2 on the own lane side. Is formed. And the elbow point E which is the intersection of both cut-off lines CL1 and CL2 is located about 0.5 to 0.6 ° below HV, and the high luminous intensity region is in the vicinity of the elbow point E on the own lane side. A hot zone HZ is formed.

  This low beam light distribution pattern PL is formed as a combined light distribution pattern of three light distribution patterns PL1, PL2, and PL3.

  The light distribution pattern PL1 is a light distribution pattern formed by reflected light from the reflection region Z1 located on the upper right side of the optical axis Ax, and the light distribution pattern PL2 is above, to the left, below, to the right of the optical axis Ax. Is a light distribution pattern formed by reflected light from four reflection regions Z2, Z4, Z6, and Z8 located in the direction, and the light distribution pattern PL3 is located at the upper left, lower left, and lower right of the optical axis Ax. It is a light distribution pattern formed by the reflected light from the three reflective regions Z3, Z5, and Z7.

  At that time, the light distribution pattern PL1 is formed as a small and bright light distribution pattern for forming the oblique cut-off line CL2, and the light distribution pattern PL2 is relatively small and relatively bright for forming the horizontal cut-off line CL1. It is formed as a light distribution pattern, and the light distribution pattern PL3 is formed as a light distribution pattern for forming a diffusion region that diffuses greatly in the left-right direction below the horizontal cutoff line CL1.

  This low beam light distribution pattern PL is for OHS irradiation for irradiating overhead signs (ie, overhead signs) OHS installed above the road surface in front of the vehicle at positions away from both of the cut-off lines CL1 and CL2. A light distribution pattern PA is formed.

  The OHS irradiation light distribution pattern PA is a light distribution pattern formed by light emitted from the light emitting element 12 incident on the translucent member 14 and emitted directly upward from the lens portion 14c toward the front of the lamp. In this case, the light distribution pattern is formed as a horizontally long thin bright light distribution pattern that extends from the VV line to the left and right sides.

  Next, the effect of this embodiment is demonstrated.

  The vehicular illumination lamp 10 according to the present embodiment causes light from the light emitting element 12 arranged toward the front of the lamp to enter the translucent member 14 arranged on the front side thereof, and to internally reflect the light on the front surface 14a. After that, the rear surface 14b reflects the inner surface again and emits the light from the front surface 14a. However, the translucent member 14 has a front surface 14a formed of a flat surface and a light incident area on the rear surface 14b. An annular region 14b3 located on the outer peripheral side of 14b1 is formed by a plurality of curved surfaces, and the annular region 14b3 is subjected to a reflection treatment. A low beam light distribution pattern PL as a first light distribution pattern having a cut-off line can be formed.

  In addition, in the vehicular illumination lamp 10 according to the present embodiment, the second light distribution is provided on the front surface 14a of the translucent member 14 at a position away from the cut-off lines CL1 and CL2 of the low beam light distribution pattern PL. A lens portion 14c for emitting a part of light from the light emitting element 12 incident on the light transmitting member 14 as upward direct light toward the front of the lamp so as to form an OHS irradiation light distribution pattern PA as a light pattern. Since it is formed, it is possible to easily irradiate the overhead sign OHS installed above the road surface in front of the vehicle.

  As described above, according to the present embodiment, in the vehicular illumination lamp 10 configured to emit the light from the light emitting element 12 to the front of the lamp by the translucent member 14 disposed on the front side thereof, a thin lamp is provided. In addition to the configuration, the low-beam light distribution pattern PL can be formed by the irradiation light, and the OHS irradiation light distribution pattern PA can be formed at a position away from the cut-off lines CL1 and CL2.

  In the present embodiment, the lens portion 14c is formed on the front surface 14a of the translucent member 14. However, since the front surface 14a is a flat surface, it is possible to easily form the lens portion 14c with high accuracy. Become.

  At that time, since the vehicle illumination lamp 10 according to the present embodiment is subjected to the reflection treatment on the central region 14a1 of the front surface 14a of the translucent member 14, more light is transmitted to the rear surface 14b of the translucent member 14. The central region 14a1 is partly configured as a non-reflective processing part, and the lens part 14c is formed in the non-reflective processing part. Can be obtained.

  That is, if a lens portion similar to the lens portion 14c is formed in the peripheral region 14a2 of the front surface 14a of the translucent member 14, the translucent member is formed in the portion where the lens portion is formed. 14 is no longer reflected toward the rear surface 14b, and the light utilization efficiency is reduced accordingly.

  On the other hand, not all of the light from the light emitting element 12 internally reflected by the central region 14a1 of the front surface 14a of the translucent member 14 reaches the annular region 14b3 of the rear surface 14b, but is compared with the optical axis Ax in the central region 14a1. Internally reflected light at a position close to the target does not reach the annular region 14b3.

  In the present embodiment, a position that is relatively close to the optical axis Ax in the central region 14a1 is configured as a non-reflective processing unit, and the lens unit 14c is formed in this non-reflective processing unit. The upward direct light for forming the OHS irradiation light distribution pattern PA can be obtained without reducing the internal reflection light.

  In the above embodiment, the light emitting element 12 has been described as having a horizontally long rectangular light emitting surface, but it is of course possible to have a light emitting surface having a shape other than this.

  In the above-described embodiment, the lens portion 14c has been described as being configured integrally with the translucent member 14, but only the portion of the lens portion 14c is configured as a separate member, and the front surface 14a of the translucent member 14 is formed. It is also possible to adopt a configuration fixed by bonding or the like.

  In the above embodiment, the first light distribution pattern is described as being configured to form the left light distribution light beam distribution pattern PL, but the right light distribution light beam distribution pattern or fog lamp Even in a case where the light distribution pattern is formed, the same effects as those of the above embodiment can be obtained by adopting the same structure as that of the above embodiment.

  In the said embodiment, although demonstrated as what was comprised so that the light distribution pattern PA for OHS irradiation might be formed as a 2nd light distribution pattern, it was comprised so that a light distribution pattern other than this might be formed It is also possible.

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  FIG. 6 is a view similar to FIG. 4 showing the vehicular illumination lamp 110 according to this modification. FIG. 7 is a perspective view showing a main part of the translucent member 114 of the vehicular illumination lamp 110.

  As shown in these drawings, the vehicular illumination lamp 110 is different in part of the configuration of the translucent member 114 from the above embodiment.

  That is, in this modification, the basic configuration of the translucent member 114 is the same as that in the above embodiment, but the configuration for forming the OHS irradiation light distribution pattern PA is different from that in the above embodiment. ing.

  Specifically, in the light transmissive member 114 of this modification, a lens portion 114c is formed in the light incident region 114b1 of the rear surface 114b, and is incident from the lens portion 114c in the central region 114a1 of the front surface 114a. The portion where the light from the light emitting element 12 reaches is configured as a non-reflective processing portion 114a1a in which the reflective film 22 is not formed.

  At this time, the lens portion 114c is formed in a laterally long outer shape so as to protrude rearward from the hemispherical surface at a position near the upper side of the optical axis Ax in the light incident region 114b1. The lens unit 114c is incident on the translucent member 114 as light slightly diffusing slightly upward in the vertical direction and light diffusing to some extent on the left and right sides in the horizontal direction. It is supposed to let you.

  On the other hand, the non-reflective processing part 114a1a is formed in a horizontally long rectangular shape at a position near the upper side of the optical axis Ax, and a part of the light from the light emitting element 12 incident on the translucent member 114 in the lens part 114c, The light is emitted as direct light slightly upward toward the front of the lamp.

  By adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above-described embodiment without providing a projecting portion on the translucent member 114.

  At this time, in this modification, when the non-reflection processing unit 114a1a is positioned above the optical axis Ax (i.e., if the non-reflection processing unit 114a1a has been subjected to reflection processing, Since the light internally reflected by the portion does not reach the annular region 114b3), it is possible to form the OHS irradiation light distribution pattern PA without reducing the inner surface reflected light toward the annular region 114b3. An upward direct light can be obtained.

  Next, a second modification of the above embodiment will be described.

  FIG. 8 is a view similar to FIG. 2 showing a vehicular illumination lamp 210 according to this modification.

  As shown in the figure, the vehicular illumination lamp 210 is different in part of the configuration of the translucent member 214 from the above embodiment.

  That is, in this modified example, as in the case of the above embodiment, the lens portion 214c is formed on the front surface 214a of the translucent member 214, but the formation position is not the central region 214a1, but the central region in the peripheral region 214a2. It is set near the upper part of 214a1.

  Like the lens portion 14c of the above-described embodiment, the lens portion 214c has a part of light from the light emitting element 12 incident on the translucent member 214 as diffused light that slightly diffuses slightly upward in the vertical direction. With respect to the horizontal direction, the light is emitted as light that diffuses to some extent on the left and right sides.

  By adopting the configuration of this modification, it is possible to easily form the reflective film 22 in the central region 214a1 of the front surface 214a of the translucent member 214.

  Next, an embodiment of the second invention of the present application will be described.

  FIG. 9 is a front view showing the vehicular illumination lamp 310 according to the present embodiment.

  As shown in the figure, the vehicular illumination lamp 310 according to the present embodiment has the same basic configuration as the vehicular illumination lamp 10 according to the embodiment of the first invention of the present application. The surface shapes of the front surface 314a and the rear surface 314b of the member 314 are different from those of the translucent member 14 of the vehicular illumination lamp 10.

  That is, in the vehicular illumination lamp 310 according to the present embodiment, the front surface 314a of the translucent member 314 is constituted by a rotating curved surface having a concave curved surface portion 314aA at the center. At this time, the rotational curved surface is formed as a smooth curved surface with the optical axis Ax as the rotational axis.

  Also in the vehicular illumination lamp 310, the light emitted from the light emitting element 12 is incident on the translucent member 314 and is internally reflected by the front surface 314a of the translucent member 314, and then the rear surface of the translucent member 314 The inner light is again reflected by 314b and emitted from the front surface 314a of the light transmitting member 314, thereby forming a light distribution pattern PL for the left beam as shown in FIG.

  In order to achieve this, also in the vehicular illumination lamp 310, as in the vehicular illumination lamp 10, the annular region 314b3 in which the reflective film 24 is formed on the rear surface 314b of the translucent member 314 is configured by a plurality of curved surfaces. ing. At this time, each of the plurality of curved surfaces causes the light from the point A of the light emitting element 12 reflected on the inner surface by the front surface 314a of the translucent member 314 to be internally reflected again, and then from the front surface 314a to the direction parallel to the optical axis Ax. A rotating curved surface whose shape is set so as to emit light is formed as a reference surface.

  Also in the vehicular illumination lamp 310, similarly to the vehicular illumination lamp 10, the central region 314a1 (that is, the central portion of the concave curved surface portion 314aA) on the front surface 314a of the translucent member 314 is subjected to reflection treatment. Thus, the reflection film 22 is formed.

  This central region 314a1 is a circular region centered on the optical axis Ax, similar to the central region 14a1 of the vehicular illumination lamp 10, and the position of its outer peripheral edge is the light emission that has reached the front surface 314a of the translucent member 314. The incident angle of the light from the element 12 (more precisely, the light from the point A) is set near the position where the critical angle is obtained. At this time, since the front surface 314a of the translucent member 314 is formed by a rotating curved surface having a concave curved surface portion 314aA at the center, the outer peripheral edge of the central region 314a1 is the case of the central region 14a1 of the vehicular illumination lamp 10 It is located closer to the optical axis Ax.

  Further, since the outer peripheral edge of the central region 314a1 on the front surface 314a of the translucent member 314 is positioned closer to the optical axis Ax in this way, the reflection from the annular region 314b3 of the rear surface 314b of the translucent member 314 is accordingly made. It becomes difficult for light to enter the central region 314a1. For this reason, the inner peripheral edge of the annular region 314b3 is also located closer to the optical axis Ax than in the annular region 14b3 of the vehicular illumination lamp 10.

  Also in the translucent member 314 of this embodiment, a lens portion 314c similar to the lens portion 14c in the translucent member 14 of one embodiment of the first invention of the present application is formed.

  That is, a position relatively close to the optical axis Ax directly above the optical axis Ax in the central region 314a1 of the front surface 314a of the translucent member 314 is formed as a non-reflective processing portion where the reflective film 22 is not formed. A lens portion 314c is formed in the non-reflective processing portion to emit part of the light from the light emitting element 12 incident on the translucent member 314 as direct light slightly upward toward the front of the lamp.

  The lens portion 314c is formed in a horizontally long outer shape so as to protrude from the front surface 314a, and has a substantially spherical surface shape. The lens portion 314c has a part of the light from the light emitting element 12 incident on the translucent member 314 as diffused light slightly diffused slightly upward in the vertical direction and to some extent on the left and right sides in the horizontal direction. It is configured to emit as diffused light.

  Even when the configuration of the present embodiment is adopted, the same operational effects as those of the embodiment of the first invention of the present application can be obtained.

  In particular, in the present embodiment, since the front surface 314a of the translucent member 314 is configured by a rotating curved surface having a concave curved surface portion 314aA in the center, the region that totally reflects on the front surface 314a is compared to a flat surface. growing. For this reason, the size of the central region 314a1 on which the reflection process is performed can be reduced. Therefore, it is possible to increase the range of the annular region 314b3 on which the reflection treatment is performed on the rear surface 314b of the translucent member 314, and to effectively use light.

  In the present embodiment, the lens portion 314c is formed on the front surface 314a of the translucent member 314. The lens portion 314c is formed at a position relatively close to the optical axis Ax, and the translucent member Since the front surface 314a of the 314 is formed of a rotating curved surface having a concave curved surface portion 314aA at the center, the front protrusion amount of the translucent member 314 is suppressed even though the lens portion 314c is formed on the front surface 314a. Thus, a thin lamp configuration can be maintained.

  Various variations as described at the end of the description of the embodiment of the first invention of the present application can be added to the configuration of the present embodiment.

  Next, a modification of the embodiment of the second invention of the present application will be described.

  FIG. 10 is a view similar to FIG. 6 showing the vehicular illumination lamp 410 according to this modification.

  As shown in the figure, the vehicular illumination lamp 410 is different in part of the configuration of the translucent member 414 from the above embodiment.

  That is, in this modification, the basic configuration of the translucent member 414 is the same as that of the translucent member 314 of the above embodiment, but the configuration for forming the OHS irradiation light distribution pattern PA is the same as that of the above embodiment. It is different from the case.

  Specifically, the translucent member 414 of this modification has a rotating curved surface with a front surface 414a having a concave curved surface portion 414aA at the center, but a lens portion 414c is formed in the light incident area 414b1 of the rear surface 414b. In addition, in the central region 414a1 of the front surface 414a, a portion where the light from the light emitting element 12 incident from the lens portion 414c reaches is configured as a non-reflective processing portion 414a1a in which the reflective film 22 is not formed. Yes.

  At this time, the lens portion 414c is formed in a horizontally long outer shape so as to protrude rearward from the hemispherical surface at a position near the upper side of the optical axis Ax in the light incident region 414b1. The lens portion 414c is incident on the translucent member 414 as light slightly diffusing slightly upward in the vertical direction and light diffusing to some extent on the left and right sides in the horizontal direction. It is supposed to let you.

  On the other hand, the non-reflective processing part 414a1a is formed in a horizontally long rectangular shape at a position near the upper side of the optical axis Ax, and a part of the light from the light emitting element 12 that has entered the light transmitting member 414 in the lens part 414c, The light is emitted as direct light slightly upward toward the front of the lamp.

  By adopting the configuration of this modified example, it is possible to obtain the same operational effects as in the case of the above-described embodiment without providing a projecting portion on the translucent member 414.

  In addition, the numerical value shown as a specification in each said embodiment and each modification is only an example, and of course, you may set these to a different value suitably.

10, 110, 210, 310, 410 Vehicle lighting lamp 12 Light emitting element 12a Light emitting chip 12b Substrate 14, 114, 214, 314, 414 Translucent member 14a, 114a, 214a, 314a, 414a Front surface 14a1, 114a1, 214a1, 314a1 414a1 Central region 14a2, 214a2 Peripheral region 14b, 114b, 314b, 414b Rear surface 14b1, 114b1, 414b1 Light incident region 14b2 Planar region 14b3, 114b3, 314b3 Annular region 14c, 114c, 214c, 314c, 414c Lens part 16 Support plate 18 Heat sink 18a Radiating fin 22, 24 Reflective film 114a1a, 414a1a Non-reflective processing part 314aA, 414aA Concave surface A A point on optical axis Ax Optical axis CL1 Horizontal cut-off Line CL2 Oblique cut-off line E Elbow point F Focus HZ Hot zone OHS Overhead marker PA Light distribution pattern for OHS irradiation (second light distribution pattern)
PL Low beam light distribution pattern (first light distribution pattern)
PL1, PL2, PL3 Light distribution pattern Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8 Reflection area

Claims (5)

  1. A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
    The front surface of the translucent member is configured with a flat surface, and the annular region located on the outer peripheral side of the light incident region where the light from the light emitting element is incident on the rear surface of the translucent member is configured with a plurality of curved surfaces. ,
    A reflection treatment is applied to the annular region,
    A part of light from the light emitting element incident on the translucent member is directed forward of the lamp so that a second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line. A vehicular illumination lamp characterized by having a lens portion that emits upward direct light.
  2. A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
    The front surface of the translucent member is configured by a rotating curved surface having a concave curved surface portion at the center, and an annular region located on the outer peripheral side of the light incident region on the rear surface of the translucent member on which light from the light emitting element is incident. It consists of multiple curved surfaces,
    A reflection treatment is applied to the annular region,
    A part of light from the light emitting element incident on the translucent member is directed forward of the lamp so that a second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line. A vehicular illumination lamp characterized by having a lens portion that emits upward direct light.
  3. A reflection treatment is applied to the central region of the front surface of the translucent member,
    The lens part is formed in the light incident region,
    The portion where the light from the light emitting element incident from the lens unit reaches in the central region is configured as a non-reflective processing unit not subjected to the reflection processing. The vehicle lighting device according to 2.
  4.   The vehicular illumination lamp according to claim 1, wherein the lens portion is formed on a front surface of the translucent member.
  5. A reflection treatment is applied to the central region of the front surface of the translucent member,
    A part of the central region is configured as a non-reflective processing part that has not been subjected to the reflective process,
    The vehicular illumination lamp according to claim 4, wherein the lens portion is formed in the non-reflective processing portion.
JP2012040760A 2011-11-29 2012-02-27 Lighting fixtures for vehicles Expired - Fee Related JP5975674B2 (en)

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JP2011260242 2011-11-29
JP2011260242 2011-11-29
JP2012040760A JP5975674B2 (en) 2011-11-29 2012-02-27 Lighting fixtures for vehicles

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Application Number Priority Date Filing Date Title
JP2012040760A JP5975674B2 (en) 2011-11-29 2012-02-27 Lighting fixtures for vehicles
US13/688,689 US9340147B2 (en) 2011-11-29 2012-11-29 Vehicle lamp
CN2012104974206A CN103133964A (en) 2011-11-29 2012-11-29 Vehicle lamp

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043109A4 (en) * 2013-09-05 2017-08-16 Ichikoh Industries, Ltd. Vehicular lighting
US10816714B2 (en) 2016-09-29 2020-10-27 Omron Corporation Light guide element, light guide unit and illumination device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06309904A (en) * 1993-04-20 1994-11-04 Koito Mfg Co Ltd Headlight for automobile
JPH11329008A (en) * 1998-05-21 1999-11-30 Koito Mfg Co Ltd Head lamp for vehicle
JP2009224303A (en) * 2008-02-22 2009-10-01 Koito Mfg Co Ltd Vehicular lighting fixture
JP2011100692A (en) * 2009-11-09 2011-05-19 Koito Mfg Co Ltd Vehicular headlight

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06309904A (en) * 1993-04-20 1994-11-04 Koito Mfg Co Ltd Headlight for automobile
JPH11329008A (en) * 1998-05-21 1999-11-30 Koito Mfg Co Ltd Head lamp for vehicle
JP2009224303A (en) * 2008-02-22 2009-10-01 Koito Mfg Co Ltd Vehicular lighting fixture
JP2011100692A (en) * 2009-11-09 2011-05-19 Koito Mfg Co Ltd Vehicular headlight

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3043109A4 (en) * 2013-09-05 2017-08-16 Ichikoh Industries, Ltd. Vehicular lighting
US9945529B2 (en) 2013-09-05 2018-04-17 Ichikoh Industries, Ltd. Vehicular lighting
US10816714B2 (en) 2016-09-29 2020-10-27 Omron Corporation Light guide element, light guide unit and illumination device

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