JP6769084B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp.

Vehicle lighting fixtures attached to vehicles, such as daytime running lamps and clearance lamps, include a light source and a lens that irradiates light from the light source. Such a vehicle lamp is required to have a configuration in which light from a light source is sufficiently diffused and emitted so that it can be visually recognized from a wide angle outside the vehicle. For example, it is known that the outer lens arranged in front of the lens is provided with a prism to diffuse the light emitted from the lens (see, for example, Patent Document 1).

JP-A-2007-280880

Since the vehicle lamp described in Patent Document 1 has a configuration in which a prism is provided on the outer lens, the design may be impaired depending on the location where the prism is arranged. Therefore, there is a need for a configuration in which the light from the light source can be sufficiently diffused in the lens and emitted.

The present invention has been made in view of the above, and an object of the present invention is to provide a vehicle lamp capable of sufficiently diffusing the light from a light source in a lens and emitting the light.

The vehicle lighting equipment according to the present invention includes a light source having a light emitting surface, an incident surface arranged so as to face the light emitting surface and incident surface to which light from the light source is incident, and a lens having an exit surface for emitting the light. The incident surface has a projecting portion that projects toward the light emitting surface side, and the light emitted from the emitting surface is formed so as to irradiate a predetermined irradiation region. With respect to a tip portion having a pointed shape on the light emitting surface side and a plane perpendicular to the optical axis as it approaches the tip portion, which is arranged at a position overlapping the central portion of the light emitting surface when viewed from the optical axis direction of the lens. The exit surface has an inclined portion whose inclination gradually becomes steep, and the exit surface has an elliptical or elliptical cross-sectional shape in the vertical direction when mounted on a vehicle, and has a predetermined horizontal cross-sectional shape. It has a curved shape.

Further, in the above-mentioned vehicle lamp, the incident surface may have a shape in which a portion extending from the tip portion of the protruding portion to the outer peripheral portion via the inclined portion is curved convexly toward the exit surface side. ..

Further, in the vehicle lighting equipment, the incident surface has a prism portion at at least one end in the horizontal direction, and the prism portion is directly outside the incident surface in the horizontal direction from the light emitting surface. It has a prism surface that refracts a part of the light traveling toward the incident surface and a part of the light reflected by the incident surface and traveling outward in the horizontal direction of the incident surface so as to irradiate the irradiation region. You may.

Further, in the above-mentioned vehicle lighting equipment, a plurality of the protrusions may be arranged side by side in the horizontal direction.

Further, in the above-mentioned vehicle lighting equipment, the lens is formed in a rectangular shape when viewed from the front or the rear in a state of being mounted on the vehicle, and the horizontal dimension is larger than the vertical dimension. May be good.

Further, in the above-mentioned vehicle lighting equipment, the light source and the lens may be used for at least one of a daytime running lamp and a clearance lamp.

According to the present invention, it is possible to provide a vehicle lamp capable of sufficiently diffusing the light from the light source in the lens and emitting the light.

FIG. 1 is a diagram showing an example of a vehicle lamp according to the first embodiment. FIG. 2 is a view when the lens is viewed from the front. FIG. 3 is a view when the lens is viewed from the side in the horizontal direction. FIG. 4 is a diagram showing a configuration along a cross section taken along the line AA in FIG. FIG. 5 is a diagram showing a configuration along a BB cross section in FIG. FIG. 6 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 7 is a diagram showing an example of a vehicle lamp according to a modified example. FIG. 8 is a diagram showing an example of a vehicle lamp according to the second embodiment. FIG. 9 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 10 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 11 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 12 is a diagram showing an example of a vehicle lamp according to the third embodiment. FIG. 13 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 14 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 15 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 16 is a diagram showing a pattern of light irradiated to the irradiation region. FIG. 17 is a diagram showing an example of a lens of a vehicle lamp according to a modified example. FIG. 18 is a diagram showing an example of a lens of a vehicle lamp according to a modified example.

Hereinafter, embodiments of the vehicle lamp according to the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

In the following description, each of the front-rear, up-down, and left-right directions is the direction in which the vehicle headlight is attached to the vehicle, and indicates the direction when the traveling direction of the vehicle is viewed from the driver's seat. In this embodiment, it is assumed that the vertical direction is parallel to the vertical direction and the horizontal direction is the horizontal direction.

<First Embodiment>
FIG. 1 is a diagram showing an example of a vehicle lamp 100 according to the first embodiment. FIG. 1 shows a state in which the vehicle lamp 100 is viewed from above in the vertical direction. The vehicle lamp 100 shown in FIG. 1 is an automobile lamp such as a daytime running lamp (daytime lamp) and a clearance lamp (vehicle side lamp). The vehicle lamp 100 may have both a daytime running lamp function and a vehicle side lamp function.

As shown in FIG. 1, the vehicle lamp 100 includes a light source 10 and a lens 20. The vehicle lamp 100 is housed in a lamp housing (not shown). The lamp housing may accommodate other vehicle lighting equipment (not shown) such as headlamps. An outer lens (not shown) is arranged in front of the lens 20.

The light source 10 has a substrate 11 and a light emitting chip 12 mounted on the substrate 11. The substrate 11 is fixed to, for example, a heat sink (not shown). The light emitting chip 12 is mounted on the substrate 11. The light emitting chip 12 is arranged, for example, at the focal point on the light source 10 side of the lens 20 described later or near the focal point. In this case, the focal point on the light source 10 side of the lens 20 is the intersection of the optical path and the optical axis of the light emitted from the incident surface 21 when the light is incident from the exit surface 22 side of the lens 20. In the present embodiment, the light emitting chip 12 is a semiconductor type light source such as an LED, an OEL, or an OLED (organic EL). The light emitting chip 12 has a light emitting surface 12f. The light emitting surface 12f is directed forward, for example. The light emitting chip 12 emits light from the light emitting surface 12f so as to form a Lambersian distribution.

The lens 20 emits light from the light source 10 to, for example, the front of the vehicle. The lens 20 is formed by using a resin such as a PC material, a PMMA material, or a PCO material. Since the light from the light source 10 which is a semiconductor type light source does not have high heat, it is possible to use the resin lens 20.

FIG. 2 is a view when the lens 20 is viewed from the front. FIG. 3 is a view when the lens 20 is viewed from the side in the horizontal direction. As shown in FIGS. 1 to 3, the lens 20 has an incident surface 21 and an exit surface 22. The incident surface 21 is directed to the rear and is arranged so as to face the light emitting surface 12f of the light emitting chip 12. Light emitted from the light emitting surface 12f is directly incident on the incident surface 21. The incident surface 21 has a protruding portion 23 that protrudes toward the light source 10.

The protruding portion 23 has a tip portion 23t and an inclined portion 23g. The tip portion 23t is arranged on the optical axis AX of the lens 20. Further, the tip portion 23t is arranged at a portion overlapping the central portion 12p of the light emitting surface 12f when viewed from the axial direction of the optical axis AX of the lens 20, for example. In the present embodiment, one light emitting chip 12 is provided, and one protruding portion 23 is provided corresponding to the light emitting chip 12. The inclined portion 23g is formed so as to gradually sharpen as it approaches the tip portion 23t for each of the vertical cross-sectional shape and the horizontal cross-sectional shape. That is, the inclined portion 23g is connected to the tip portion 23t, and is formed so that the inclination of the optical axis AX with respect to the plane perpendicular to the axial direction gradually becomes steeper as it approaches the tip portion 23t. Since the incident surface 21 is provided with the protruding portion 23, the portion extending from the tip portion 23t through the inclined portion 23g to the outer peripheral portion has a shape that is convexly curved toward the exit surface 22 side. The inclined portion 23g includes, for example, at least one of a flat portion and a curved portion.

The tip portion 23t has a sharp shape on the light emitting surface 12f side. In the present embodiment, the tip portion 23t is formed in, for example, a rounded shape, but the present invention is not limited to this, and the tip portion 23t may be formed in a flat shape. In this case, the tip portion 23t may be formed in a plane shape parallel to a plane perpendicular to the axis direction of the optical axis AX, for example. In the present embodiment, the tip portion 23t is arranged on the optical axis AX of the lens 20.

The exit surface 22 is directed forward. The exit surface 22 has a curved surface that becomes convex toward the front. The exit surface 22 has, for example, an elliptical or elliptical basic cross-sectional shape and a horizontal cross-sectional shape having a predetermined curvature when mounted on a vehicle. Therefore, the exit surface 22 can diffuse light more in the horizontal direction than in the vertical direction to emit light. As shown in FIG. 3, the exit surface 22 is formed in a rectangular shape with rounded corners, for example, when viewed from the front side. The exit surface 22 has a horizontal dimension larger than a vertical dimension.

When the light emitting chip 12 of the light source 10 of the vehicle lamp 100 configured as described above is turned on, light is emitted from the light emitting surface 12f of the light emitting chip 12. The light emitted from the light emitting surface 12f is incident on the incident surface 21 of the lens 20.

FIG. 4 is a diagram showing a configuration along the AA cross section in FIG. 2, and shows a horizontal cross section of the lens 20. For example, as shown in FIG. 4, the light L1 and L2 incident on the vicinity of the tip portion 23t of the projecting portion 23 of the incident surface 21 are focused on the optical axis AX side by the projecting portion 23, and the light is emitted from the emitting surface 22. It emits inward in the horizontal direction with respect to the axis AX. Further, for example, the light L3 and L4 incident on the periphery of the tip portion 23t of the projecting portion 23 of the incident surface 21 are refracted by the projecting portion 23 and are emitted from the emitting surface 22 to the outside in the horizontal direction with respect to the optical axis AX. .. In this way, the light incident on the protrusion 23 is diffused in the horizontal direction and emitted.

Further, the lens 20 has a shape in which the incident surface 21 is curved so as to be convex toward the exit surface 22 from the tip portion 23t to the outer circumference. Therefore, the light L5 and L6 that reach the outside of the protrusion 23 in the horizontal direction and the lights L7 and L8 that reach both ends in the horizontal direction of the incident surface 21 are likely to be incident on the incident surface 21. Therefore, the light from the light emitting surface 12f can be effectively used.

Further, FIG. 5 is a diagram showing a configuration along the BB cross section in FIG. 2, and shows a cross section of the lens 20 in the vertical direction. As shown in FIG. 5, the light incident on the tip portion 23t of the protruding portion 23 and the light L11, L12, etc. incident on the inclined portion 23g near the tip portion 23t of the incident surface 21 are AX by the protruding portion 23. The light is focused on the side and is emitted from the exit surface 22 inward in the vertical direction with respect to the optical axis AX. Further, for example, the lights L13 and L14 incident on the inclined portion 23g on the outer peripheral side of the protruding portion 23 of the incident surface 21 are emitted from the emitting surface 22 to the outside in the vertical direction with respect to the optical axis AX. In this way, the light incident on the protrusion 23 is diffused in the vertical direction and emitted. Further, among the incident surfaces 21, the lights L15 and L16 reaching the outside of the protruding portion 23 in the vertical direction and the lights L17 and L18 reaching both ends in the vertical direction are likely to be incident on the incident surface 21. Therefore, the light from the light emitting surface 12f can be effectively used.

FIG. 6 is a diagram showing a pattern of light emitted to the irradiation region IA in front of the vehicle. As shown in FIG. 6, the light irradiated to the irradiation region IA in front of the vehicle forms the pattern P1. The pattern P1 is, for example, a region t1 including the light incident on the tip portion 23t of the projecting portion 23 and its vicinity (for example, the above-mentioned lights L1, L2, L11, L12, etc.) of the incident surface 21, and the projecting portion of the incident surface 21. A region s1 including light incident on the inclined portion 23g on the outer peripheral side of 23 (for example, the above-mentioned lights L3, L4, L13, L14, etc.) and light incident on the outside of the protruding portion 23 of the incident surface 21 (for example, A region u1 containing the light L5, L6, L7, L8, L15, L16, L17, L18, etc.) is formed. The pattern P1 has a shape that extends in the horizontal direction H with respect to the vertical direction V, for example.

As described above, the vehicle lamp 100 according to the present embodiment includes a light source 10 having a light emitting surface 12f and a lens 20 having an incident surface 21 and an emitting surface 22, and the lens 20 has an incident surface 21 as a light emitting surface. It has a protruding portion 23 protruding to the 12f side, and the protruding portion 23 is arranged at a position overlapping the central portion of the light emitting surface 12f when viewed from the axial direction of the optical axis AX of the lens 20, and has a sharp shape on the light emitting surface 12f side. It has a tip portion 23t of the lens and an inclined portion 23g which is connected to the tip portion 23t and whose inclination with respect to a plane perpendicular to the optical axis AX gradually becomes steeper as it approaches the tip portion 23t. Therefore, the lens 20 can emit the light incident on the protrusion 23 by diffusing the light from the exit surface 22. As described above, since the light can be sufficiently diffused and emitted by the lens 20, for example, it is not necessary to provide a prism or the like on the outer lens arranged in front of the lens 20. As a result, the vehicle lamp 100 can sufficiently diffuse the light from the light source 10 in the lens 20 and emit it.

Further, in the vehicle lighting equipment 100, the vertical cross-sectional shape of the exit surface 22 is elliptical or elliptical, and the horizontal cross-sectional shape has a predetermined curvature. Therefore, the exit surface 22 is in the horizontal direction rather than the vertical direction. It is possible to diffuse the light more and emit it. As a result, the vehicle lamp 100 can be visually recognized from a wide horizontal angle outside the vehicle when applied to a daytime running lamp or a clearance lamp.

Further, in the vehicle lamp 100 according to the present embodiment, the portion of the incident surface 21 of the lens 20 from the tip portion 23t to the outer peripheral portion via the inclined portion 23g is curved so as to be convex toward the exit surface 22 side. It has a shape. Therefore, light directed from the light emitting surface 12f to the outside of the incident surface 21, such as light reaching the outside of the protruding portion 23 of the incident surface 21 and light reaching the outer peripheral portion of the incident surface 21, is incident on the incident surface 21. It will be easier. Therefore, the light from the light emitting surface 12f can be effectively used.

Further, since the vehicle lamp 100 can incident light directed to the outside of the incident surface 21 from the light emitting surface 12f onto the incident surface 21, the light emitting surface 12f and the incident surface 21 can be arranged close to each other. .. As a result, space can be saved in the lamp housing in which the vehicle lamp 100 is provided.

FIG. 7 is a diagram showing an example of a vehicle lamp 100A according to a modified example. As shown in FIG. 7, the vehicle lamp 100A may have a configuration in which the lens 20A has a prism portion 24 in addition to the above configuration. The prism portion 24 is arranged at both ends in the horizontal direction of the incident surface of the lens 20A, for example. The arrangement of the prism portion 24 is not limited to this, and the prism portion 24 may be arranged at any one end in the horizontal direction.

The prism portion 24 has a prism surface 24a. The prism surface 24a is formed, for example, in a plane shape, and is arranged so as to be inclined toward the light emitting surface 12f side with respect to a plane perpendicular to the optical axis AX. The prism surface 24a is arranged on an optical path of light traveling from the light emitting surface 12f toward the outside of the incident surface 21 in the horizontal direction. The prism surface 24a is a part of light that travels directly from the light emitting surface 12f toward the outside of the incident surface 21 in the horizontal direction and light that is reflected by the incident surface 21 and travels toward the outside of the incident surface 21 in the horizontal direction. A part of the light is refracted so that the irradiation area is irradiated.

Depending on the emission angle from the light emitting surface 12f, a part of the light emitted from the light emitting surface 12f may be totally reflected toward the outside of the incident surface 21 by the inclined portion 23g. In a configuration in which the prism portion 24 is not provided, the totally reflected light becomes stray light as it is, and cannot be effectively used. On the other hand, in the above configuration in which the prism portion 24 is provided, the prism portion 24 refracts a part of the light totally reflected by the inclined portion 23g so as to irradiate the irradiation region. The part can be used effectively. As a result, waste of light emitted from the light emitting surface 12f can be reduced.

Since the lens 20A has the prism portion 24, the irradiation region IA can be irradiated with the light passing outside the incident surface 21 in the horizontal direction as described above. In this case, as shown in FIG. 6, the pattern P1A formed in the irradiation region IA has a region pr containing the light irradiated to the irradiation region IA by the prism portion 24. Therefore, the pattern P1A has a shape that is wider in the horizontal direction by the amount of the region pr as compared with the above pattern P1. As a result, the vehicle lamp 100 can diffuse the light from the light source 10 in the more horizontal direction and emit it.

<Second Embodiment>
FIG. 8 is a diagram showing an example of the vehicle lamp 200 according to the second embodiment. The vehicle lamp 200 according to the first embodiment has a configuration in which the light source 110 has two light emitting chips 12 and the lens 120 has two protrusions 23 on the incident surface 21. It is different from the vehicle lamp 100. Other configurations of the vehicle lamp 200 are the same as those of the vehicle lamp 100 according to the first embodiment. In the second embodiment, the same components as those of the vehicle lamp 100 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.

As shown in FIG. 8, the light source 110 includes a substrate 111 and two light emitting chips 12A and 12B mounted on the substrate 111. The light emitting chips 12A and 12B are mounted on the substrate 111, for example, side by side in the horizontal direction. The light emitting chips 12A and 12B are arranged on both sides of the optical axis AX of the lens 120 in the horizontal direction, for example, and are arranged at positions where the distances from the optical axis AX are equal. Each of the light emitting chips 12A and 12B has the same configuration as the light emitting chip 12 described in the first embodiment, for example.

The lens 120 has an incident surface 121 and an exit surface 122. The incident surface 121 is directed rearward and is arranged so as to face the light emitting surface 12f of the light emitting chips 12A and 12B. Light emitted from the light emitting surface 12f is directly incident on the incident surface 121. The incident surface 121 has two projecting portions 23A and 23B that project toward the light source 110 side.

The protruding portion 23A has a tip portion 23t at a portion overlapping the central portion 12p of the light emitting surface 12f of the light emitting chip 12A when viewed from the axial direction of the optical axis AX of the lens 120, for example. Further, the protruding portion 23B has a tip portion 23t at a portion overlapping the central portion 12p of the light emitting surface 12f of the light emitting chip 12B when viewed from the axial direction of the optical axis AX of the lens 120, for example.

The protrusions 23A and 23B are arranged side by side in the horizontal direction, for example. The protruding portions 23A and 23B are arranged at positions where the tip portions 23t are arranged on both sides of the optical axis AX of the lens 120 in the horizontal direction, for example, and the distances from the optical axis AX are equal. Therefore, the protruding portion 23A is arranged corresponding to the light emitting chip 12A. Further, the protruding portion 23B is arranged corresponding to the light emitting chip 12B. Each of the protrusions 23A and 23B has, for example, the same shape as the protrusion 23 described in the first embodiment. For example, as the protrusion 23t is connected to the tip 23t and approaches the tip 23t, the inclination with respect to the plane perpendicular to the optical axis AX gradually increases. It has an inclined portion of 23 g that becomes steep. By providing the protruding portion 23A and the protruding portion 23B, two optical control regions are formed on the incident surface 121.

The exit surface 122 is directed forward. The exit surface 122 has a curved surface that becomes convex toward the front. The exit surface 122 has an elliptical or elliptical basic cross-sectional shape, for example, and a horizontal cross-sectional shape having a predetermined curvature when mounted on a vehicle. The emission surface 122 may have the same or different curvatures in the vertical cross-sectional shape and the horizontal cross-sectional shape as the exit surface 22 of the lens 20 described in the first embodiment.

Further, the lens 120 may have a configuration having a prism portion 24. In this case, the prism portion 24 is arranged at both ends in the horizontal direction of the incident surface 121 of the lens 120, for example. The arrangement of the prism portion 24 is not limited to this, and the prism portion 24 may be arranged at any one end in the horizontal direction. Each of the prism portions 24 can have the same configuration as that of the first embodiment, for example.

When the light emitting chips 12A and 12B of the light source 110 of the vehicle lighting equipment 200 configured as described above are turned on, light is emitted from the light emitting surface 12f of the light emitting chips 12A and 12B. The light emitted from the light emitting surface 12f is incident on the incident surface 121 of the lens 120. The light incident on the protrusions 23A and 23B of the incident surface 121 is diffused in the horizontal direction and emitted. Further, the light that reaches the outside of the protruding portions 23A and 23B of the incident surface 121 and the light that reaches the outer peripheral portion are likely to be incident on the incident surface 121.

FIG. 9 is a diagram showing a pattern of light emitted from the light emitting chip 12A and irradiated to the irradiation region IA in front of the vehicle. As shown in FIG. 9, the light forms a pattern PA. The pattern PA includes, for example, a region ta including light incident on the tip portion 23t of the protruding portion 23A and light incident on the inclined portion 23g in the vicinity of the tip portion 23t, and an inclination of a portion of the protruding portion 23A away from the tip portion 23t. It has a region sa containing light incident on the portion 23g and a region ua containing light incident on the outside of the protruding portion 23A of the incident surface 121. The pattern PA has, for example, a shape that extends from the reference position in the horizontal direction H to one side in the horizontal direction (to the right in FIG. 9).

FIG. 10 is a diagram showing a pattern of light emitted from the light emitting chip 12B and irradiated to the irradiation region IA in front of the vehicle. As shown in FIG. 10, the light forms a pattern PB. The pattern PB includes, for example, a region tb containing light incident on the tip portion 23t of the protruding portion 23B and light incident on the inclined portion 23g in the vicinity of the tip portion 23t, and an inclination of a portion of the protruding portion 23B away from the tip portion 23t. It has a region sb containing light incident on the portion 23g and a region ub containing light incident on the outside of the protruding portion 23B of the incident surface 121. The pattern PB has a shape that extends from the reference position in the horizontal direction H to the other side in the horizontal direction (left in FIG. 10), for example.

FIG. 11 is a diagram showing a pattern in which the pattern PA shown in FIG. 9 and the pattern PB shown in FIG. 10 overlap each other. As shown in FIG. 11, the light emitted from the light emitting chips 12A and 12B is irradiated to the irradiation region IA by the lens 120 to form the pattern P2. The pattern P2 is in a state in which the pattern PA shown in FIG. 9 and the pattern PB shown in FIG. 10 overlap each other. The pattern P2 has a region t2 formed by overlapping the regions ta and tb, a region s2 formed by overlapping the regions sa and sb, and a region u2 formed by overlapping the regions ua and ub. are doing. The pattern P2 has a shape that extends from the reference position in the horizontal direction H to the left and right directions in the horizontal direction, for example.

Since the vehicle lamp 200 according to the present embodiment irradiates the irradiation region IA with the light from the two light emitting chips 12A and 12B by the lens 120, the brightness of the pattern P2 is higher than that in the case where the light emitting chip 12 is one. Can be improved. Further, since the two light emitting chips 12A and 12B share one emission surface 122, a design surface having one emission surface 122 can be obtained even when the two light emitting chips 12A and 12B are used. .. Further, since the protruding portions 23A and 23B are provided corresponding to the light emitting chips 12A and 12B, the lens 120 can emit light from the emitting surface 122 in the wide-angle direction. As a result, the vehicle lamp 200 can sufficiently diffuse the light from the light source 110 in the horizontal direction and emit the light.

Further, when the prism portion 24 is provided, the pattern P2 has a region pr containing the light irradiated to the irradiation region IA by the prism portion 24. In this case, the pattern P2 has a shape that expands in the horizontal direction by the amount of the region pr. As a result, the vehicle lamp 200 can diffuse the light from the light source 110 in a more horizontal direction and emit the light.

<Third Embodiment>
FIG. 12 is a diagram showing an example of the vehicle lamp 300 according to the third embodiment. The vehicle lamp 300 according to the first embodiment has a configuration in which the light source 210 has three light emitting chips 12 and the lens 220 has three protrusions 23 on the incident surface 21. It is different from the vehicle lamp 100. Other configurations of the vehicle lamp 300 are the same as those of the vehicle lamp 100 according to the first embodiment. In the third embodiment, the same components as those of the vehicle lamp 100 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted or simplified.

As shown in FIG. 12, the light source 210 has a substrate 211 and three light emitting chips 12C, 12D and 12E mounted on the substrate 211. The light emitting chips 12C, 12D, and 12E are mounted on the substrate 211, for example, side by side in the horizontal direction. Of the light emitting chips 12C, 12D and 12E, the light emitting chip 12D arranged at the center in the horizontal direction is arranged at the focal point of the lens 220 or near the focal point. The light emitting chips 12C and 12E are arranged on both sides of the light emitting chip 12D in the horizontal direction, and are arranged at positions where the distances from the light emitting chips 12D are equal to each other. Each of the light emitting chips 12C, 12D and 12E has the same configuration as the light emitting chip 12 described in the first embodiment, for example.

The lens 220 has an incident surface 221 and an exit surface 222. The incident surface 221 is directed rearward and is arranged to face the light emitting surface 12f of the light emitting chips 12C, 12D, and 12E. Light emitted from the light emitting surface 12f is directly incident on the incident surface 221. The incident surface 221 has three protrusions 23C, 23D, and 23E that protrude toward the light source 110 side.

The protruding portion 23C has a tip portion 23t at a portion overlapping the central portion 12p of the light emitting surface 12f of the light emitting chip 12C when viewed from the axial direction of the optical axis AX of the lens 120, for example. Further, the protruding portion 23D has a tip portion 23t at a portion overlapping the central portion 12p of the light emitting surface 12f of the light emitting chip 12D when viewed from the axial direction of the optical axis AX of the lens 120, for example. Further, the protruding portion 23E has a tip portion 23t at a portion overlapping the central portion 12p of the light emitting surface 12f of the light emitting chip 12E when viewed from the axial direction of the optical axis AX of the lens 120, for example.

The protrusions 23C, 23D and 23E are arranged side by side in the horizontal direction, for example. The protruding portions 23C and 23E are arranged at positions where the tip portions 23t are arranged on both sides of the optical axis AX of the lens 220 in the horizontal direction, for example, and the distances from the optical axis AX are equal. Further, the protruding portion 23D has a tip portion 23t arranged on the optical axis AX. Therefore, the protruding portion 23C is arranged corresponding to the light emitting chip 12C. Further, the protruding portion 23D is arranged corresponding to the light emitting chip 12D. Further, the protruding portion 23E is arranged corresponding to the light emitting chip 12E. Each of the protrusions 23C, 23D and 23E has, for example, the same shape as the protrusion 23 described in the first embodiment, and is inclined with respect to a plane perpendicular to the optical axis AX as it is connected to the tip 23t and approaches the tip 23t. Has an inclined portion 23 g in which is gradually steep. By providing the protrusions 23C, 23D and 23E, three optical control regions are formed on the incident surface 221.

The exit surface 222 is directed forward. The exit surface 222 has a curved surface that becomes convex toward the front. The exit surface 222 has, for example, an elliptical or elliptical basic cross-sectional shape and a horizontal cross-sectional shape having a predetermined curvature when mounted on a vehicle. The exit surface 222 may have the same or different curvatures in the vertical cross-sectional shape and the horizontal cross-sectional shape as the exit surface 22 of the lens 20 described in the first embodiment.

Further, the lens 220 may have a configuration having a prism portion 24. In this case, the prism portion 24 is arranged at both ends in the horizontal direction of the incident surface 221 of the lens 220, for example. The arrangement of the prism portion 24 is not limited to this, and the prism portion 24 may be arranged at any one end in the horizontal direction. Each of the prism portions 24 can have the same configuration as that of the first embodiment, for example.

When the light emitting chips 12C, 12D and 12E of the light source 210 of the vehicle lamp 300 configured as described above are turned on, light is emitted from the light emitting surface 12f of the light emitting chips 12C, 12D and 12E. The light emitted from the light emitting surface 12f is incident on the incident surface 221 of the lens 220. The light incident on the protrusions 23C, 23D and 23E of the incident surface 221 is diffused in the horizontal direction and emitted. Further, light that reaches the outside of the protruding portions 23C, 23D, and 23E of the incident surface 221 and light that reaches the outer peripheral portion are likely to be incident on the incident surface 221.

FIG. 13 is a diagram showing a pattern of light emitted from the light emitting chip 12C and irradiated to the irradiation region IA in front of the vehicle. As shown in FIG. 13, the light forms a pattern PC. The pattern PC includes, for example, a region tk containing light incident on the tip portion 23t of the protruding portion 23C and light incident on the inclined portion 23g near the tip portion 23t, and an inclination of a portion of the protruding portion 23C away from the tip portion 23t. It has a region sc containing light incident on the portion 23g and a region uc containing light incident on the outside of the protruding portion 23C in the incident surface 121. The pattern PC has a shape that extends from the reference position in the horizontal direction H to one side in the horizontal direction (left side in FIG. 13), for example.

FIG. 14 is a diagram showing a pattern of light emitted from the light emitting chip 12D and irradiated to the irradiation region IA in front of the vehicle. As shown in FIG. 14, the light forms a pattern PD. The pattern PD includes, for example, a region td containing light incident on the tip portion 23t of the protruding portion 23D and light incident on the inclined portion 23g near the tip portion 23t, and an inclination of a portion of the protruding portion 23D away from the tip portion 23t. It has a region sd containing light incident on the portion 23g and a region ud containing light incident on the outside of the protruding portion 23D of the incident surface 221. The pattern PD has, for example, a shape centered on a reference position in the horizontal direction H.

FIG. 15 is a diagram showing a pattern of light emitted from the light emitting chip 12E and irradiated to the irradiation region IA in front of the vehicle. As shown in FIG. 15, the light forms a pattern PE. The pattern PE includes, for example, a region te containing light incident on the tip portion 23t of the protruding portion 23E and light incident on the inclined portion 23g in the vicinity of the tip portion 23t, and an inclination of a portion of the protruding portion 23E away from the tip portion 23t. It has a region se containing light incident on the portion 23g and a region ue containing light incident on the outside of the protruding portion 23E of the incident surface 221. The pattern PE has a shape that extends from the reference position in the horizontal direction H to the other side in the horizontal direction (to the right in FIG. 15), for example.

FIG. 16 is a diagram showing a pattern in which the pattern PC shown in FIG. 13, the pattern PD shown in FIG. 14, and the pattern PE shown in FIG. 15 are overlapped with each other. As shown in FIG. 16, the light emitted from the light emitting chips 12C, 12D and 12E is irradiated to the irradiation region IA by the lens 220 to form the pattern P3. The pattern P3 is a state in which the pattern PC shown in FIG. 13, the pattern PD shown in FIG. 14, and the pattern PE shown in FIG. 15 overlap each other. The pattern P3 is formed by, for example, overlapping the region t3 formed by overlapping the regions tc, td and te, the region s3 formed by overlapping the regions sc, sd and se, and the regions uc, ud and ue. It has a region u3 to be formed. The pattern P3 has a shape that extends from the reference position in the horizontal direction H to the left and right directions in the horizontal direction, for example.

Since the vehicle lamp 300 according to the present embodiment irradiates the irradiation region IA with the light from the three light emitting chips 12C, 12D and 12E by the lens 220, the pattern P3 is compared with the case where the light emitting chip 12 is one. The brightness of the lens can be further improved. Further, since the three light emitting chips 12C, 12D and 12E share one emission surface 222, even when the three light emitting chips 12C, 12D and 12E are used, the design surface having one emission surface 222 can be used. Obtainable. Further, since the projecting portions 23C, 23D and 23E are provided corresponding to the light emitting chips 12C, 12D and 12E, the lens 220 can emit light from the exit surface 222 in the wide-angle direction. As a result, the vehicle lamp 300 can sufficiently diffuse the light from the light source 210 in the horizontal direction and emit the light.

Further, when the prism portion 24 is provided, the pattern P3 has a region pr containing the light irradiated to the irradiation region IA by the prism portion 24. In this case, the pattern P3 has a shape that extends in the horizontal direction by the amount of the region pr. As a result, the vehicle lamp 300 can diffuse the light from the light source 210 in a more horizontal direction and emit the light.

The technical scope of the present invention is not limited to the above-described embodiment, and modifications can be made as appropriate without departing from the spirit of the present invention. 17 and 18 are views showing an example of a lens of a vehicle lamp according to a modified example. Note that in FIGS. 17 and 18, the protrusion 23 is not shown. For example, as in the lens 20B shown in FIG. 17, the incident surface 21 may have a plurality of segments SGa to SGe arranged side by side in the vertical direction. The inclination of the lens 20B with respect to the plane perpendicular to the optical axis AX is set for each of the segments SGa to SGe. The incident surface 21 may be smooth, for example, between adjacent segments. Further, the incident surface 21 may have a structure in which, for example, the space between adjacent segments is not smooth and has a bent portion. By providing the segments SGa to SGe on the incident surface 21, the lens 20B finely adjusts the emission direction of the light emitted from the emission surface 22 with respect to the vertical direction.

Further, as in the lens 20C shown in FIG. 18, the incident surface 21 may have a plurality of segments SGf to SGj arranged side by side in the horizontal direction. The inclination of the lens 20C with respect to the plane perpendicular to the optical axis AX is set for each segment SGf to SGj. Similarly, in the lens 20C, the incident surface 21 may be smooth between adjacent segments, for example. Further, the incident surface 21 may have a structure in which, for example, the space between adjacent segments is not smooth and has a bent portion. By providing the segments SGf to SGj on the incident surface 21, the lens 20C finely adjusts the emission direction of the light emitted from the emission surface 22 in the horizontal direction.

10,110,210 Light source 11,111,211 Substrate 12, 12A, 12B, 12C, 12D, 12E Light emitting chip 12f Light emitting surface 12p Central part 20, 20A, 20B, 20C, 120, 220 Lens 21,121,221 Incident surface 22,122,222 Exit surface 23,23A, 23B, 23C, 23D, 23E Protruding part 23g Inclined part 23t Tip part 24 Prism part 24a Prism surface 100, 100A, 200, 300 Vehicle lighting equipment H Horizontal direction V Vertical direction L1 L8, L11 to L18 Optical P1 to P3, P1A, PA to PE pattern IA Irradiation area AX Optical axis SGa to SGe, SGf to SGj segment

Claims (5)

A light source with a light emitting surface and
A lens arranged so as to face the light emitting surface and having an incident surface on which light from the light source is incident and an exit surface on which the light is emitted.
With
The incident surface has a protruding portion protruding toward the light emitting surface side, and is formed so that the light emitted from the emitting surface is irradiated to a predetermined irradiation region.
The protruding portion is arranged at a position overlapping the central portion of the light emitting surface when viewed from the optical axis direction of the lens, and is connected to the tip portion and the tip portion having a sharp shape toward the light emitting surface side. It has an inclined portion in which the inclination with respect to the plane perpendicular to the optical axis gradually becomes steeper as it approaches.
The exit surface is vertical sectional shape in a state of being mounted on the vehicle in the form of oval or elliptical keynote, and Ri shape der the horizontal cross-sectional shape having a predetermined curvature,
The incident surface has a shape in which a portion of the protruding portion extending from the tip portion to the outer peripheral portion via the inclined portion is curved convexly toward the exit surface side.
The protruding portion is a vehicle lamp having a shape having corners . The incident surface has a prism portion at at least one end in the horizontal direction.
The prism portion includes a part of light that travels directly from the light emitting surface toward the outside of the incident surface in the horizontal direction and light that is reflected by the incident surface and travels toward the outside of the incident surface in the horizontal direction. The vehicle lamp according to claim 1 , which has a prism surface that refracts a part of the light portion so as to irradiate the irradiation region. The vehicle lamp according to claim 1 or 2 , wherein a plurality of the protruding portions are arranged side by side in the horizontal direction. Any one of claims 1 to 3 , wherein the lens is formed in a rectangular shape when viewed from the front or the rear when mounted on a vehicle, and the horizontal dimension is larger than the vertical dimension. The vehicle lighting equipment described in item 1. The vehicle lighting device according to any one of claims 1 to 4 , wherein the light source and the lens are used for at least one of a daytime running lamp and a clearance lamp.

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