JP2009129572A - Lamp for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a conventional lamp for a vehicle can hardly obtain a light distribution pattern suited for a given lamp function. <P>SOLUTION: The lamp for a vehicle is provided with a semiconductor light source 4, a first reflecting face 5 as well as a second reflecting face 6, and a first lens 8 as well as a second lens 9. The first reflecting face 5 reflects light L1 from the semiconductor light source 4 toward a side of the first lens 8. The first lens 8 emits reflecting light L2 from the first reflecting face 5 as a first light distribution pattern P1 with the reflecting light L2 spread to right and left. The second lens 9 emits direct light L1 from the semiconductor light source 4 into the first light distribution pattern P1 as a second light distribution pattern P2 with the light L1 spread to right and left. The second reflecting face 6 emits light L1 from the semiconductor light source 4 into the first light distribution pattern P1 and the second light distribution pattern P2 as a third light distribution pattern P3 with the light L1 focused. As a result, a light distribution pattern suited for a given lamp function can be obtained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicular lamp that uses a semiconductor light source as a light source. In particular, the present invention relates to a vehicular lamp that can obtain a light distribution pattern suitable for a predetermined lamp function by appropriately combining three light distribution patterns in an overlapping manner.

  Conventionally, a vehicular lamp using a semiconductor-type light source as a light source is known (for example, Patent Document 1). Hereinafter, a conventional vehicular lamp will be described. A conventional vehicular lamp includes a semiconductor light emitting element and a projection lens fixed to the front surface of the semiconductor light emitting element. When the light emitting chip of the semiconductor light emitting element is turned on and emitted, light from the light emitting chip is transmitted through the projection lens and irradiated in a predetermined direction as a predetermined light distribution pattern. This predetermined light distribution pattern is a horizontally long light distribution pattern that is a horizontally elongated light distribution pattern in which a light emission image of a rectangular (square) light emitting chip is inverted and projected by a projection lens, and is formed on the upper edge by the lower end edge of the light emitting chip. This is a light distribution pattern having a cut-off line (that is, a light distribution pattern for an additional lamp).

  However, the conventional vehicular lamp can obtain only one light distribution pattern that is a reverse projection image of the light emitting chip. For this reason, it is difficult for a conventional vehicular lamp to obtain a predetermined lamp function, for example, a light distribution pattern suitable for an additional lamp (additional lamp).

JP-A-2005-141918

  The problem to be solved by the present invention is that it is difficult to obtain a light distribution pattern suitable for a predetermined lamp function with a conventional vehicular lamp.

  The present invention (the invention according to claim 1) includes a semiconductor-type light source, a first reflecting surface and a second reflecting surface, a first lens and a second lens, and the semiconductor-type light source is a lens of the second lens. The semiconductor-type light source is disposed at or near the focal point, the first reflecting surface is a reflecting surface that reflects light from the semiconductor-type light source toward the first lens, and the first lens is from the first reflecting surface. Is a lens that emits the reflected light as a first light distribution pattern that is expanded to the left and right, and the second lens is included in the first light distribution pattern as a second light distribution pattern that expands the direct light from the semiconductor light source to the left and right. It is a lens to be emitted, and the second reflecting surface is a reflecting surface that reflects the first light distribution pattern and the second light distribution pattern as a third light distribution pattern in which light from the semiconductor light source is converged. Features.

  In the present invention (the invention according to claim 2), the semiconductor light source is a semiconductor light source having a rectangular (square) light emitter, and the first reflecting surfaces are provided above and below the semiconductor light source. And a reflecting surface of a rotating paraboloid focusing on the light emitter or its vicinity of the semiconductor light source, and the first lens is provided above and below the semiconductor light source so as to face the upper and lower first reflecting surfaces. The second lens is provided between the upper and lower first lenses so as to face the semiconductor-type light source, and the longitudinal cross-sectional shape is the cross-sectional shape of the aspherical lens. In addition, a cylindrical lens obtained by rotating the cross section of the aspherical lens around the vertical axis or substantially the vertical axis passing through the focal point of the second lens or the vicinity thereof, or a semi-cylindrical shape obtained by extending the cross section of the aspherical lens to the left and right Les The second reflection surface is provided between the upper and lower first reflection surfaces, and reflects light from the semiconductor-type light source between the upper and lower first lenses and to the left and right sides of the second lens. It is a free-form reflecting surface.

  Further, according to the present invention (the invention according to claim 3), a lamp unit comprising a semiconductor light source, a first reflecting surface and a second reflecting surface, and a first lens and a second lens is arranged on a vertical axis or a substantially vertical axis. It is characterized by comprising a holder that is rotatably held around, and a drive unit that rotates the lamp unit about a vertical axis or a substantially vertical axis.

  Furthermore, in the present invention (the invention according to claim 4), the light distribution pattern obtained by superimposing the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern is along the cutoff line of the main light distribution pattern. It is a light distribution pattern for additional lamps having a cut-off line and a hot zone located closer to the inside of the vehicle.

  Furthermore, according to the present invention (the invention according to claim 5), the light distribution pattern obtained by superimposing the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern is closer to the cutoff line and the cutoff line. And a light distribution pattern for a fog lamp having a hot zone located.

  In the vehicular lamp according to the present invention (the invention according to claim 1), light from the semiconductor-type light source is reflected to the first lens side by the first reflecting surface, and reflected from the first reflecting surface by the first lens. Light is emitted as a first light distribution pattern that is spread left and right. Further, the second lens emits direct light from the semiconductor light source into the first light distribution pattern as a second light distribution pattern expanded to the left and right. Further, the second reflection surface reflects the light from the semiconductor light source into the first light distribution pattern and the second light distribution pattern as a third light distribution pattern converged. As a result, the vehicular lamp of the present invention (the invention according to claim 1) can obtain three light distribution patterns of the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern. For this reason, the vehicular lamp according to the present invention (the invention according to claim 1) can obtain a light distribution pattern suitable for a predetermined lamp function by superimposing three light distribution patterns and appropriately combining them.

  In addition, the vehicular lamp according to the present invention (the invention according to claim 1) uses light from a semiconductor-type light source as direct light by the second lens, and the first reflecting surface and the second reflecting surface provide a semiconductor. Light from the mold light source is used as reflected light. For this reason, the vehicular lamp according to the present invention (the invention according to claim 1) effectively utilizes light from a semiconductor light source, and the light intensity (illuminance, light amount) of the light distribution pattern in which three light distribution patterns are superimposed. ) Can be increased efficiently.

  The vehicular lamp according to the present invention (the invention according to claim 2) is provided above and below the semiconductor-type light source, and the first reflection of the paraboloid that focuses on the light-emitting body of the semiconductor-type light source or its vicinity. The light from the semiconductor-type light source is efficiently and reliably reflected to the first lens side by the surface, and is provided above and below the semiconductor-type light source so as to face the upper and lower first reflection surfaces. Reflected light from the first reflecting surface is efficiently and reliably emitted as a first light distribution pattern that is expanded to the left and right by the first lens having. Also, it is provided between the upper and lower first lenses facing the semiconductor-type light source, and the longitudinal cross-sectional shape is the cross-sectional shape of the aspherical lens, and the aspherical lens cross-section is the focal point of the second lens or its vicinity. Direct light from a semiconductor-type light source can be obtained by a cylindrical second lens that is rotated about the vertical axis or substantially vertical axis, or a semi-cylindrical second lens that is formed by extending the cross section of the aspherical lens to the left and right. Thus, the light emission image of the rectangular light emitter is efficiently and reliably emitted into the first light distribution pattern as the second light distribution pattern expanded to the left and right. Furthermore, a free curved second reflection surface is provided between the upper and lower first reflection surfaces and reflects light from the semiconductor-type light source between the upper and lower first lenses to the left and right sides of the second lens. The light from the semiconductor light source is reflected efficiently and reliably into the first light distribution pattern and the second light distribution pattern as the third light distribution pattern in which the light is converged. As a result, in the vehicular lamp of the present invention (the invention according to claim 2), the three light distribution patterns of the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern are efficiently and reliably obtained. can get. For this reason, the vehicular lamp of the present invention (the invention according to claim 2) efficiently combines a light distribution pattern suitable for a predetermined lamp function by superimposing three light distribution patterns and appropriately combining them. It is definitely obtained.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 3) includes a semiconductor light source, a first reflecting surface and a second reflecting surface, a first lens and a second lens, by a holder and a drive unit, The lamp unit made of can be rotated about the vertical axis or about the vertical axis, so that it can correspond to an adaptive front lighting system (AFS). That is, the vehicular lamp of the present invention (the invention according to claim 3) can change the irradiation direction of the light irradiated from the lamp unit in accordance with the traveling state of the vehicle.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 4) is a first light distribution by spreading light from the semiconductor-type light source reflected by the first reflecting surface to the left and right by the first lens. Since the pattern is formed, the brightness difference (luminous intensity difference, illuminance difference, light intensity difference) at the edge of the first light distribution pattern can be reduced and blurred. For this reason, the vehicular lamp of the present invention (the invention according to claim 4) has improved visibility due to blurring of the brightness difference of the edge of the first light distribution pattern forming the edge of the light distribution pattern for the additional lamp. And it can relieve eyestrain of drivers and other people.

  Further, the vehicle lamp of the present invention (the invention according to claim 4) is a direct light from a semiconductor-type light source disposed at or near the lens focus of the second lens, and a light emission image of a rectangular light emitter. Is expanded in the left and right directions by the second lens and formed as the second light distribution pattern in the first light distribution pattern, so that the brightness difference of the edge of the second light distribution pattern can be increased and clarified. For this reason, the vehicular lamp of the present invention (the invention according to claim 4) clearly defines the edge of the second light distribution pattern that forms the cut-off line of the light distribution pattern for additional lamps along the cut-off line of the main light distribution pattern. With a bright and dark difference, glare can be prevented and distant visibility is improved.

  Furthermore, the vehicular lamp according to the present invention (the invention according to claim 4) is configured such that the light from the semiconductor-type light source is converged and reflected by the second reflecting surface to form the first light distribution pattern and the second light distribution as the third light distribution pattern. Since it forms in a pattern, a hot zone is formed in a 1st light distribution pattern and a 2nd light distribution pattern by this 3rd light distribution pattern. In addition, in the vehicular lamp of the present invention (the invention according to claim 4), since the hot zone of the light distribution pattern for the additional lamp is located closer to the inside of the vehicle, an optimal light distribution pattern can be obtained as the light distribution pattern for the additional lamp. It is done. That is, when the additional light distribution pattern is superimposed on the side of the main light distribution pattern, the difference in brightness from the center of the main light distribution pattern to the side of the additional light distribution pattern is gradually changed. Therefore, the light distribution pattern is optimal as a light distribution pattern for additional lights. Further, when the lamp unit is rotated about the vertical axis or about the vertical axis, it is possible to reliably prevent light from passing between the side of the main light distribution pattern and the light distribution pattern for the additional lamp.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 5) is a first light distribution in which the light from the semiconductor-type light source and reflected by the first reflecting surface is expanded left and right by the first lens. Since the pattern is formed, the brightness difference (luminous intensity difference, illuminance difference, light intensity difference) at the edge of the first light distribution pattern can be reduced and blurred. For this reason, the vehicular lamp of the present invention (the invention according to claim 5) has improved visibility due to the blurring of the brightness difference of the edge of the first light distribution pattern forming the edge of the light distribution pattern for fog lamps, and Relieve eyestrain of drivers and other people.

  The vehicle lamp according to the present invention (the invention according to claim 5) is a direct light from a semiconductor-type light source disposed at or near the lens focal point of the second lens, and a light emission image of a rectangular light emitter. Is expanded in the left and right directions by the second lens and formed as the second light distribution pattern in the first light distribution pattern, so that the brightness difference of the edge of the second light distribution pattern can be increased and clarified. For this reason, the vehicular lamp of the present invention (the invention according to claim 5) can prevent glare due to a clear difference in brightness of the edge of the second light distribution pattern that forms the cut-off line of the light distribution pattern for fog lamps, and Distant visibility is improved.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 5) has the first light distribution pattern and the second light distribution as the third light distribution pattern by converging and reflecting the light from the semiconductor light source on the second reflecting surface. Since it forms in a pattern, a hot zone is formed in a 1st light distribution pattern and a 2nd light distribution pattern by this 3rd light distribution pattern. Moreover, in the vehicular lamp of the present invention (the invention according to claim 5), since the hot zone of the fog lamp light distribution pattern is located near the cutoff line, an optimum light distribution pattern can be obtained as the fog lamp light distribution pattern. That is, the light / dark difference on the side opposite to the cut-off line of the fog lamp light distribution pattern, that is, the lower light / dark difference gradually changes, so that the front side of the vehicle can be widely illuminated with no light / dark difference. In addition, since the light-dark difference on the cut-off line side, that is, the upper side of the fog lamp light distribution pattern changes greatly and clearly, glare can be prevented and distant visibility is improved.

  Hereinafter, four examples of embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the claims, “up, down, left, right” and “front, back, up, down, left, right” in this specification refer to the vehicle “when the vehicle lamp is mounted on the vehicle”. Front, back, top, bottom, left, right ". In the drawings, the symbol “F” indicates the forward direction of the vehicle (automobile) (the forward direction of the automobile). The symbol “B” indicates the backward direction of the vehicle. Reference sign “U” indicates an upward direction as viewed from the driver side. Reference sign “D” indicates a downward direction as viewed from the driver side. The symbol “L” indicates the left direction when the front direction is viewed from the driver side. The symbol “R” indicates the right direction when the front direction is viewed from the driver side. The symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

  1 to 9 show Embodiment 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp according to the first embodiment will be described. In FIG. 8, reference numeral 100 denotes a vehicle headlamp (automobile headlamp device) including the vehicle lamp 1 according to the first embodiment. The vehicle headlamps 100 are respectively provided on the left and right of the front portion of the vehicle. Hereinafter, the vehicle headlamp 100 equipped on the right side of the front portion of the vehicle will be described. In addition, the structure of the vehicle headlamp mounted on the left side of the front portion of the vehicle is substantially symmetrical. Moreover, the said vehicle headlamp 100 is used for the left-hand traffic of Japan, and the light distribution pattern shown in FIG. 9 is obtained. A vehicular headlamp used for left-hand traffic in Europe can obtain a light distribution pattern substantially similar to the light distribution pattern shown in FIG. Conversely, a vehicle headlamp used for right-hand traffic in Europe and right-hand traffic in North America can obtain a light distribution pattern that is substantially opposite to the left and right light distribution patterns shown in FIG.

  As shown in FIG. 8, the vehicle headlamp 100 includes a lamp housing 102 and a lamp lens (for example, a plain outer lens) 103 that define a lamp chamber 101, and an optical axis adjustment in the lamp chamber 101, for example. The projector-type headlamp 104 arranged via the mechanism and the vehicular lamp 1 according to the first embodiment are provided. In the lamp chamber 101, a lamp (lamp unit) other than the headlamp 104 and the vehicle lamp 1 according to the first embodiment, an inner panel, an inner housing, an inner lens, and the like are disposed. There is also.

  The headlamp 104 includes a reflector 106 having a free curved surface (NURBS curved surface) or a spheroid reflecting surface 105 having an ellipse as a base (reference, keynote), and a detachable attachment to the reflector 106. A discharge lamp 107 as a light source located at or near the first focal point of the reflecting surface 105, a projection lens (condensing lens, convex lens) 108, a second focal point at or near the reflecting surface 105, or the projection lens 108. And a frame (or a holder or a bracket) 110 for holding the reflector 106, the projection lens 108, and the shade 109. In addition, the code | symbol 111 in FIG. 8 is the cap attached to the edge of the through-hole 112 for the said discharge lamp 107 replacement | exchange provided in the said lamp housing 102 so that attachment or detachment is possible.

  The headlamp 104 irradiates the front of the vehicle with a passing light distribution pattern LP as a main light distribution pattern shown in FIG. That is, the discharge lamp 107 is turned on. Then, the light emitted from the light emitting part of the discharge lamp 107 is reflected by the reflecting surface 105 of the reflector 106 toward the projection lens 108. A part of the reflected light is cut off by the shade 109, and the remaining reflected light is transmitted through the projection lens 108 and irradiated to the front of the vehicle as the passing light distribution pattern LP. A lower horizontal cut-off line CL1, an elbow point E, an oblique cut-off line CL2, and an upper horizontal cut-off line CL3 are formed on the upper edge of the light distribution pattern LP for passing by the upper edge of the shade 109, respectively. Has been. The lower horizontal cut-off line CL1 is located on the oncoming lane side, and is arranged below the left and right horizontal lines HL-HR of the screen so as not to give glare to the oncoming vehicle. . Further, the upper horizontal cut-off line CL3 is located on the own lane side, and is configured to maintain distant visibility by being located above the horizontal horizontal line HL-HR of the screen. .

  As shown in FIGS. 1 to 5 and 8, the vehicular lamp 1 includes a lamp unit 2 and the lamp unit 2 around a vertical axis or a substantially vertical axis (hereinafter simply referred to as “vertical axis”) V. A holder (not shown) that is rotatably held and a drive unit 3 that rotates the lamp unit 2 around the vertical axis V are provided. Although the holder is not shown, for example, the lamp housing 102 or a bracket arranged in the lamp chamber 101 is used.

  As shown in FIGS. 1 to 5 and 8, the lamp unit 2 includes a semiconductor light source 4, a reflector 7 having a first reflecting surface 5 and a second reflecting surface 6, a first lens 8 and a second lens. 9 and a heat sink member 10.

  As the semiconductor-type light source 4, for example, a self-luminous semiconductor-type light source (LED in this embodiment 1) such as LED and EL (organic EL) is used. The semiconductor-type light source 4 covers a substrate 11, a light emitter (not shown) of a light source chip (semiconductor chip) having a small rectangular shape (square shape) fixed to one surface of the substrate 11, and the light emitter. The light transmissive member 12 and a connector or harness (not shown) connected to a power source (not shown) are configured. The semiconductor light source 4 is fixed to the heat sink member 10 via a holder member (not shown) or directly. The light emitter (light emitting portion) of the semiconductor light source 4 is disposed at or near the lens focal point FL of the second lens 9. Light L1 is emitted (emitted) from the luminous body of the semiconductor-type light source 4 within the range of the emission angle (emission angle) θ.

  The reflector 7 has a hollow shape that is open on the front side and closed on the other side. Rotating shafts 13 are fixed to the upper and lower surfaces of the reflector 7, respectively. When the rotary shaft 13 is rotatably held by the holder, the lamp unit 2 is held rotatably around the vertical axis V. In addition, since the rotary shaft 13 is connected to the drive unit 3, the lamp unit 2 is rotated about the vertical axis V by the drive of the drive unit 3. A through hole 14 is provided in the center of the rear surface of the reflector 7. The heat sink member 10 is inserted and fixed in the through hole 14. As a result, the semiconductor light source 4 is attached to the reflector 7 through the heat sink member 10.

  The first reflecting surfaces 5 are respectively provided at both upper and lower end portions (that is, the upper and lower sides of the semiconductor-type light source 4) of the inner surface (the surface facing the front-side opening) of the closing portion of the reflector 7. The first reflecting surface 5 is a reflecting surface that reflects light L1 near the outside of the radiation angle θ out of the light L1 emitted from the semiconductor-type light source 4 to the first lens 8 side. The first reflecting surface 5 is a rotating paraboloid reflecting surface having a focal point F <b> 1 at or near the light emitter of the semiconductor light source 4. The focal point F1 of the first reflecting surface 5 and the lens focal point FL of the second lens 9 are located at the same position or close to each other.

  The first lens 8 is provided at the upper and lower ends of the opening on the front side of the reflector 7 (that is, the upper and lower sides with respect to the semiconductor light source 4) so as to face the upper and lower first reflecting surfaces 5, respectively. ing. The first lens 8 is a lens that emits the reflected light L2 from the first reflecting surface 5 as a first light distribution pattern P1 (see FIG. 6A) that is expanded left and right. The first lens 8 is a lens having a small vertical kamaboko-shaped or small vertical cylindrical prism element group 15. By the prism element group 15, the light L <b> 3 emitted from the first lens 8 is greatly expanded to the left and right.

  As shown in FIG. 6A, the left end of the first light distribution pattern P1 is positioned at about 5.5 ° on the right side with respect to the vertical vertical line VU-VD of the screen. The right end is positioned about 60 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the first light distribution pattern P1 is about 2 ° below the horizontal horizontal line HL-HR of the screen. The lower edge of the first light distribution pattern P1 is located at about 10.5 ° below the horizontal horizontal line HL-HR of the screen. The first light distribution pattern P1 shown in FIG. 6 (A) is a light distribution pattern emitted from the vehicular lamp 1 according to the first embodiment equipped on the right side of the vehicle, and is equipped on the left side of the vehicle. The first light distribution pattern emitted from the vehicular lamp is opposite to the first light distribution pattern P1 shown in FIG.

  The second lens 9 is provided opposite to the semiconductor light source 4 at the center of the opening on the front side of the reflector 7 (that is, between the upper and lower first lenses). The second lens 9 is a light L1 (direct light) near the center of the radiation angle θ of the light L1 emitted from the semiconductor-type light source 4 and expands the light emission image of the rectangular light emitter to the left and right. The lens emits light into the first light distribution pattern P1 as the second light distribution pattern P2 (see FIG. 6B). The second lens 9 has an aspherical lens having a vertical cross-sectional shape, and the aspherical lens cross-section is rotated about the vertical axis or substantially the vertical axis passing through the focal point FL of the second lens 9 or the vicinity thereof. This is a cylindrical lens. The front side (external side) of the vertical cross section of the second lens 9 has a convex aspheric surface, while the rear side (side facing the semiconductor light source 4) of the vertical cross section of the second lens 9 is flat. An aspherical surface (plane) is formed. The rear side of the longitudinal section of the second lens 9 may be a convex aspheric surface having a smaller curvature than the front side (the curvature radius is larger than the front side). By the cylindrical lens, the light L4 emitted from the second lens 9 is greatly expanded to the left and right. The upper and lower edges of the second light distribution pattern P2 are substantially horizontal.

  As shown in FIG. 6B, the left end of the second light distribution pattern P2 is positioned about 5.5 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the second light distribution pattern P2 The right end is positioned at about 60 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the second light distribution pattern P2 is about 1.5 below the horizontal horizontal line HL-HR on the screen. The lower edge of the second light distribution pattern P2 is positioned at about 5.5 ° below the horizontal horizontal line HL-HR of the screen. The second light distribution pattern P2 shown in FIG. 6B is a light distribution pattern emitted from the vehicle lamp 1 according to the first embodiment, which is provided on the right side of the vehicle, and is provided on the left side of the vehicle. The second light distribution pattern emitted from the vehicular lamp is opposite to the left and right of the second light distribution pattern P2 shown in FIG.

  The second reflecting surfaces 6 are respectively provided at the left and right end portions of the inner surface of the closed portion of the reflector 7 (that is, between the upper and lower first reflecting surfaces 5). The second reflecting surface 6 serves as a third light distribution pattern P3 (see FIG. 6C) in which light L1 near the outside of the radiation angle θ out of the light L1 emitted from the semiconductor-type light source 4 is converged. The reflecting surface reflects the first light distribution pattern P1 and the second light distribution pattern P2. The second reflecting surface 6 is a free-form reflecting surface that reflects the light L1 from the semiconductor-type light source 4 to the left and right sides of the second lens 9 between the upper and lower first lenses 8. The light L5 reflected by the second reflecting surface 6 is converged (collected) by the free-form reflecting surface. The free-form surface (NURBS surface) of the second reflecting surface 6 is a NURBS free-form surface (Non-Uniform Rational B-Spline Surface) described in “Mathematical Elemennts for Computer Graphics” (Devid F. Rogers, J Alan Adams). ).

  As shown in FIG. 6C, the left end of the third light distribution pattern P3 is positioned about 8 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the right end of the third light distribution pattern P3 is The upper edge of the third light distribution pattern P3 is about 2 ° below the horizontal horizontal line HL-HR of the screen. The lower edge of the third light distribution pattern P3 is positioned at about 5 ° below the horizontal horizontal line HL-HR of the screen. The third light distribution pattern P3 shown in FIG. 6C is a light distribution pattern emitted from the vehicular lamp 1 according to the first embodiment, which is provided on the right side of the vehicle, and is provided on the left side of the vehicle. The second light distribution pattern emitted from the vehicular lamp is opposite to the left and right of the third light distribution pattern P3 shown in FIG.

  By superimposing the first light distribution pattern P1, the second light distribution pattern P2, and the third light distribution pattern P3, as shown in FIGS. 7 and 9, the lower light distribution pattern LP is horizontally below. Additional lamp light distribution patterns RCP and LCP having a cut-off line CL1, cut-off lines CL4R and CL4L along the upper horizontal cut-off line CL3, and a hot zone HZ located closer to the inside of the vehicle are formed. The hot zone HZ is located closer to the inner side of the vehicle than the center of the additional lamp light distribution pattern RCP, LCP in the left-right direction (the chain line in FIG. 7).

  As shown in FIG. 7, the left end of the additional light distribution pattern RCP is positioned about 5.5 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the right end of the additional light distribution pattern RCP. Is positioned at about 60 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the light distribution pattern RCP for additional lamp is about 1.5% below the horizontal line HL-HR on the screen. And the lower edge of the additional light distribution pattern RCP is positioned about 10.5 ° below the horizontal horizontal line HL-HR of the screen. The additional light distribution pattern RCP shown in FIG. 7 is a light distribution pattern emitted from the vehicle lamp 1 according to the first embodiment, which is provided on the right side of the vehicle, and is provided for the vehicle provided on the left side of the vehicle. The additional lamp light distribution pattern LCP emitted from the lamp is opposite to that of the additional lamp light distribution pattern RCP shown in FIG.

  From the vehicular lamp 1 according to the first embodiment installed on the right side of the vehicle shown in FIGS. 1 to 5 and FIG. 8, a lower horizontal cut-off line CL1 on the right side (opposite lane side) of the passing light distribution pattern LP. The additional light distribution pattern RCP on the right side having the cut-off line CL4R along the hot zone HZ located closer to the inside of the vehicle is irradiated. On the other hand, a vehicle lamp mounted on the left side of the vehicle (not shown) is located on the left side (own lane side) of the passing light distribution pattern LP along the cut-off line CL4L along the upper horizontal cut-off line CL3 and closer to the inside of the vehicle. The left additional light distribution pattern LCP having a hot zone (not shown) is irradiated. The cut-off lines CL4R and CL4L of the additional lamp light distribution patterns RCP and LCP irradiated from the vehicular lamp 1 according to the first embodiment are substantially horizontal.

  The drive unit 3 changes the irradiation direction of the additional lamp light distribution patterns RCP and LCP irradiated from the vehicular lamp 1 according to the first embodiment in accordance with the traveling state of the vehicle. It comprises a stepping motor (not shown) driven by control (not shown) and a rotational force transmission mechanism. When the stepping motor is driven by the control means, the vehicular lamp 1 according to the first embodiment rotates to the left and right around the vertical axis V.

  A detection means (not shown) is connected to the control means. The detection means detects a change in a road environment, map information, and a traveling state of the vehicle under a vehicle traveling environment, and outputs a detection signal to the control means. Examples of the detection signal of the detection means include a steering angle signal, a vehicle speed signal, and a navigation signal. The control means turns on and off the semiconductor light source 4 of the vehicular lamp 1 according to the first embodiment based on a detection signal from the detection means. The control means outputs a pulse signal (control signal) for controlling the driving of the stepping motor to the stepping motor based on a detection signal from the detection means. The stepping motor is driven based on a pulse signal from the control means. As a result, the vehicular lamp 1 according to the first embodiment rotates left and right around the vertical axis V. The control means may turn on / off the discharge lamp 107 of the headlamp 104 of the vehicle headlamp 100 based on a detection signal from the detection means.

  The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the discharge lamp 107 of the headlamp 104 of the vehicle headlamp 100 is turned on. Then, the passing light distribution pattern LP shown in FIG. 9 is irradiated in front of the vehicle. In addition, the semiconductor light source 4 of the vehicle lamp 1 on the right side of the vehicle headlamp 100 is turned on. Then, the additional light distribution pattern RCP on the right side having the cut-off line CL4R along the lower horizontal cut-off line CL1 on the right side of the passing light distribution pattern LP and the hot zone HZ located closer to the vehicle inner side is irradiated. Further, the semiconductor light source of the vehicular lamp on the left side of the vehicular headlamp 100 is turned on. Then, the left additional light distribution pattern LCP having a cut-off line CL4L along the upper horizontal cut-off line CL3 on the left side of the passing light distribution pattern LP and a hot zone (not shown) located closer to the inner side of the vehicle is obtained. Irradiated.

  When a steering handle (not shown) is steered left and right, the right additional light distribution pattern RCP on the right side or the left additional light distribution pattern LCP is swiveled (moved) to the left and right. For example, when the steering handle at the neutral position (neutral position) is steered to the right, the right additional light distribution pattern RCP is swiveled from the neutral position shown in FIG. 7 to the right (in the direction of the solid arrow in FIG. 7). When the steering wheel is returned, the right additional light distribution pattern RCP on the right side returns to the neutral position shown in FIG. When the steering handle at the neutral position is steered to the left, the left additional light distribution pattern LCP swivels leftward from the neutral position, and when the steering handle is returned, the left additional light distribution pattern at the left is located. The light pattern LCP returns to the neutral position.

  The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp 1 according to the first embodiment, the light L1 from the semiconductor-type light source 4 is reflected by the first reflecting surface 5 toward the first lens 8, and the first lens 8 causes the light L1 from the first reflecting surface 5 to be reflected. The reflected light L2 is emitted as a first light distribution pattern P1 that is expanded to the left and right. Further, the second lens 9 emits the direct light L1 from the semiconductor-type light source 4 into the first light distribution pattern P1 as the second light distribution pattern P2 expanded to the left and right. Furthermore, the light L1 from the semiconductor-type light source 4 is reflected by the second reflecting surface 6 into the first light distribution pattern P1 and the second light distribution pattern P2 as the third light distribution pattern P3. As a result, the vehicular lamp 1 according to the first embodiment can obtain three light distribution patterns of the first light distribution pattern P1, the second light distribution pattern P2, and the third light distribution pattern P3. Therefore, the vehicular lamp 1 according to the first embodiment is suitable for a predetermined lamp function, in this example, an additional lamp, by appropriately combining the three light distribution patterns P1, P2, and P3 in an overlapping manner. Light distribution patterns RCP and LCP are obtained.

  Moreover, the vehicular lamp 1 according to the first embodiment uses the light L1 from the semiconductor-type light source 4 as direct light by the second lens 9, and by the first reflecting surface 5 and the second reflecting surface 6, Light L1 from the semiconductor-type light source 4 is used as reflected light. For this reason, the vehicular lamp 1 according to the first embodiment effectively uses the light L1 from the semiconductor light source 4 to superimpose the three light distribution patterns P1, P2, and P3 on the additional light distribution pattern. The luminous intensity (illuminance, light quantity) of RCP and LCP can be increased efficiently.

  The vehicular lamp 1 according to the first embodiment is provided above and below the semiconductor-type light source 4, and is a first paraboloid of revolution having a focal point F1 at or near the light emitter of the semiconductor-type light source 4. 5, the light L1 from the semiconductor-type light source 4 is efficiently and reliably reflected to the first lens 8 side, and is provided above and below the semiconductor-type light source 4 so as to face the upper and lower first reflection surfaces 5. Thus, the first lens 8 having the prism element group 15 efficiently and reliably emits the reflected light L2 from the first reflecting surface 5 as the first light distribution pattern P1 expanded to the left and right. Further, it is provided between the upper and lower first lenses 8 so as to face the semiconductor-type light source 4, and the longitudinal cross-sectional shape is a cross-sectional shape of an aspherical lens, and the aspherical lens cross-section is the focal point of the second lens 9. Cylindrical second lens 9 that is rotated about the vertical axis or substantially the vertical axis passing through FL or the vicinity thereof causes direct emission light L1 from semiconductor-type light source 4 and the light emission image of the rectangular light emitter to the left and right. The expanded second light distribution pattern P2 is efficiently and reliably emitted into the first light distribution pattern P1. Furthermore, it is provided between the upper and lower first reflecting surfaces 5, and has a free-form surface that reflects the light L 1 from the semiconductor light source 4 between the upper and lower first lenses 8 to both the left and right sides of the second lens 9. The second reflection surface 6 efficiently and reliably reflects the light L1 from the semiconductor light source 4 as the third light distribution pattern P3 converged into the first light distribution pattern P1 and the second light distribution pattern P2. . As a result, the vehicular lamp 1 according to the first embodiment efficiently and reliably obtains the three light distribution patterns of the first light distribution pattern P1, the second light distribution pattern P2, and the third light distribution pattern P3. It is done. Therefore, the vehicular lamp 1 according to the first embodiment is suitable for a predetermined lamp function, in this example, an additional lamp, by appropriately combining the three light distribution patterns P1, P2, and P3 in an overlapping manner. Light distribution patterns RCP and LCP can be obtained efficiently and reliably.

  Further, the vehicular lamp 1 according to the first embodiment includes the holder and the drive unit 3 to make the semiconductor light source 4, the first reflecting surface 5 and the second reflecting surface 6, the first lens 8 and the second lens 9. Therefore, the lamp unit 2 can be rotated around the vertical axis V, so that it can correspond to an adaptive front lighting system (AFS). That is, the vehicular lamp 1 according to the first embodiment can change the irradiation direction of the light L3, L4, and L5 emitted from the lamp unit 2 in accordance with the traveling state of the vehicle.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, the light L1 from the semiconductor-type light source 4 and reflected by the first reflecting surface 5 is expanded to the left and right by the first lens 8, and the first distribution is made. Since the light pattern P1 is formed, the brightness difference (light intensity difference, illuminance difference, light amount difference) between the upper and lower edges of the first light distribution pattern P1 can be reduced and blurred. For this reason, the vehicular lamp 1 according to the first embodiment is visually recognized by blurring of the brightness difference between the upper and lower edges of the first light distribution pattern P1 that forms the upper and lower edges of the additional light distribution patterns RCP and LCP. It improves the performance and relieves eyestrain of drivers and other people.

  In addition, the vehicular lamp 1 according to the first embodiment is a direct light L1 from the semiconductor-type light source 4 disposed at or near the lens focal point FL of the second lens 9, and a light emission image of a rectangular light emitter. Is formed in the first light distribution pattern P1 as the second light distribution pattern P2 by expanding it to the left and right with the second lens 9, so that the brightness difference between the upper and lower edges of the second light distribution pattern P2 is increased and clarified. be able to. For this reason, the vehicular lamp 1 according to the first embodiment has the second distribution that forms the cut-off lines CL4R and CL4L of the additional light distribution patterns RCP and LCP along the cut-off lines CL1 and CL3 of the passing light distribution pattern. Due to the clear contrast between the upper edge of the light pattern P2, glare can be prevented and distant visibility is improved.

  Further, the vehicular lamp 1 according to the first embodiment converges and reflects the light L1 from the semiconductor light source 4 on the second reflecting surface 6 to form the third light distribution pattern P3 and the first light distribution pattern P1 and the second light distribution pattern P3. Since it is formed in the light pattern P2, the third light distribution pattern P3 forms a hot zone HZ in the first light distribution pattern P1 and the second light distribution pattern P2. Moreover, in the vehicular lamp 1 according to the first embodiment, since the hot zone HZ of the additional lamp light distribution pattern RCP, LCP is located closer to the inside of the vehicle, the optimal light distribution as the additional lamp light distribution pattern RCP, LCP. A pattern is obtained. That is, when the additional lamp light distribution patterns RCP and LCP are superimposed on the right side and the left side of the passing light distribution pattern LP, the additional lamp light distribution pattern passes from the center to the right side and the left side of the passing light distribution pattern LP. Since the contrast between the light patterns RCP and LCP can be gradually reduced, the light distribution pattern is optimal as the additional lamp light distribution pattern RCP and LCP. Further, when the lamp unit 2 is rotated about the vertical axis V, it is possible to reliably prevent light from passing between the right side and the left side of the passing light distribution pattern LP and the additional lamp light distribution patterns RCP and LCP. .

  10 to 13 show Embodiment 2 of a vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 9 denote the same components. Hereinafter, the vehicular lamp 1A according to the second embodiment will be described.

  Similar to the second lens 9 of the vehicular lamp 1 according to the first embodiment, the second lens 9A of the vehicular lamp 1A according to the second embodiment has a central portion ( That is, it is provided opposite to the semiconductor-type light source 4 between the upper and lower first lenses. The second lens 9A is a light L1 (direct light) near the center of the radiation angle θ of the light L1 emitted from the semiconductor-type light source 4, and expands the light emission image of the rectangular light emitter left and right. This is a lens that emits light into the first light distribution pattern P1 as the second light distribution pattern P2A (see FIG. 12B). The shape of the second lens 9A of the vehicle lamp 1A according to the second embodiment is different from the shape of the second lens 9 of the vehicle lamp 1 according to the first embodiment. That is, the second lens 9A is a semi-cylindrical lens having a vertical cross-sectional shape that is the cross-sectional shape of an aspherical lens and a cross-section of the aspherical lens that extends to the left and right. The front side (external side) of the vertical cross section of the second lens 9A has a convex aspheric surface, while the rear side (side facing the semiconductor light source 4) of the vertical cross section of the second lens 9A is flat. An aspherical surface (plane) is formed. The rear side of the vertical cross section of the second lens 9A may be a convex aspheric surface having a smaller curvature than the front side (the radius of curvature is larger than the front side). Due to the semi-cylindrical lens, the light L4 emitted from the second lens 9A is greatly spread left and right. In addition, the upper and lower edges of the central portion of the second light distribution pattern P2A are substantially horizontal, and the upper and lower edges of the left and right ends of the second light distribution pattern P2A are warped up and down due to lens aberration. Yes.

  As shown in FIG. 12B, the left end of the second light distribution pattern P2A is positioned about 9 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the right end of the second light distribution pattern P2A is The upper edge of the central portion of the second light distribution pattern P2A is approximately lower than the horizontal horizontal line HL-HR of the screen. The second light distribution pattern P2A is positioned at 2.5 °, and the lower edge of the central portion of the second light distribution pattern P2A is positioned at about 7.5 ° below the horizontal horizontal line HL-HR of the screen. The upper edges of the left and right ends of P2A are positioned at about 1.5 ° below the horizontal line HL-HR of the screen, and the lower edges of the left and right ends of the second light distribution pattern P2A are the horizontal lines of the screen. It is located at about 8.5 ° below the HL-HR. The second light distribution pattern P2A shown in FIG. 12 (B) is a light distribution pattern emitted from the vehicle lamp 1A according to the second embodiment that is provided on the right side of the vehicle, and is provided on the left side of the vehicle. The second light distribution pattern irradiated from the vehicular lamp is opposite to the left and right of the second light distribution pattern P2A shown in FIG.

  In the vehicle lamp 1A according to the second embodiment, the shape of the second lens 9A is different from the shape of the second lens 9 of the vehicle lamp 1 according to the first embodiment, but other components are the same as those described above. The components are the same as those of the vehicular lamp 1 according to the first example. Therefore, the vehicular lamp 1A according to the second embodiment is different from the second light distribution pattern P2 of the vehicular lamp 1 according to the first embodiment in that the second light distribution pattern P2A is different from the first light distribution pattern P2A. The pattern P1 and the third light distribution pattern P3 are the same as the first light distribution pattern P1 and the third light distribution pattern P3 of the vehicular lamp 1 according to the first embodiment.

  By superimposing the first light distribution pattern P1, the second light distribution pattern P2A, and the third light distribution pattern P3, as shown in FIG. 13, a lower horizontal cut-off line CL1 of the passing light distribution pattern LP is formed. Then, an additional lamp light distribution pattern RCPA having a cut-off line CL4RA along the upper horizontal cut-off line CL3 and a hot zone HZ located closer to the inside of the vehicle is formed. The hot zone HZ is located closer to the inner side of the vehicle than the center in the left-right direction of the additional light distribution pattern RCPA (the chain line in FIG. 13).

  As shown in FIG. 13, the left end of the additional lamp light distribution pattern RCPA is positioned about 5.5 ° to the right with respect to the vertical vertical line VU-VD of the screen, and the right end of the additional lamp light distribution pattern RCPA. Is positioned at about 60 ° to the right of the vertical vertical line VU-VD of the screen, and the upper edge from the left end to the center of the additional light distribution pattern RCPA is relative to the horizontal horizontal line HL-HR of the screen. Located on the lower side at about 1.5 °, the upper edge of the right lamp light distribution pattern RCPA is slightly warped and located at about 1 ° on the lower side of the horizontal horizontal line HL-HR of the screen. The lower edge of the additional light distribution pattern RCPA is positioned at about 10.5 ° below the horizontal horizontal line HL-HR of the screen. The additional light distribution pattern RCPA shown in FIG. 13 is a light distribution pattern emitted from the vehicle lamp 1A according to the second embodiment that is provided on the right side of the vehicle. The additional lamp light distribution pattern irradiated from the lamp is opposite to that of the additional lamp light distribution pattern RCPA shown in FIG.

  From the vehicular lamp 1A according to the second embodiment mounted on the right side of the vehicle shown in FIGS. 10 and 11, a cut along the lower horizontal cut-off line CL1 on the right side (opposite lane side) of the passing light distribution pattern LP. The right additional light distribution pattern RCPA having the offline CL4RA and the hot zone HZ located closer to the inner side of the vehicle is irradiated. On the other hand, a vehicle lamp mounted on the left side of the vehicle (not shown) includes a cut-off line (not shown) along the upper horizontal cut-off line CL3 on the left side (own lane side) of the passing light distribution pattern LP, and the vehicle inner side. A left side additional light distribution pattern (not shown) having a hot zone (not shown) located near the surface is irradiated. The cut-off line CL4RA of the additional lamp light distribution pattern RCPA irradiated from the vehicular lamp 1A according to the second embodiment is substantially horizontal from the vehicle inner end to the center, and the vehicle outer end is slightly warped. ing. Even if the vehicle outer end of the cut-off line CL4RA of the additional lamp light distribution pattern RCPA is slightly warped, it is located at about 1 ° below the horizontal horizontal line HL-HR of the screen. There is no risk of glare on oncoming vehicles.

  Since the vehicular lamp 1A according to the second embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the operational effects of the vehicular lamp 1 according to the first embodiment.

  14 to 16 show a third embodiment of the vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 13 denote the same components. Hereinafter, the vehicular lamp according to the third embodiment will be described.

  The vehicular lamp according to the third embodiment is different from the vehicular lamp 1 according to the first embodiment and the vehicular lamp 1A according to the second embodiment, which form additional light distribution patterns RCP, LCP, and RCPA. The fog lamp light distribution pattern FP is formed. The components of the vehicular lamp according to the third embodiment are the same as the components of the vehicular lamp 1 according to the first embodiment. The first light distribution pattern P1B, the second light distribution pattern P2B, and the third light distribution pattern P3B of the vehicle lamp according to the third embodiment are the first light distribution pattern P1 of the vehicle lamp 1 according to the first embodiment. And different from the second light distribution pattern P2 and the third light distribution pattern P3.

  That is, as shown in FIG. 14A, the left end of the first light distribution pattern P1B is positioned at about 37 ° on the left side with respect to the vertical vertical line VU-VD of the screen, and the first light distribution pattern P1B The right end is positioned at about 37 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the first light distribution pattern P1B is about 3.5 below the horizontal horizontal line HL-HR of the screen. The lower edge of the first light distribution pattern P1B is positioned at about 12 ° below the horizontal horizontal line HL-HR of the screen. The first light distribution pattern P1B shown in FIG. 14 (A) is a light distribution pattern irradiated from the vehicle lamp according to the third embodiment equipped on the right side of the vehicle, and the vehicle equipped on the left side of the vehicle. The first light distribution pattern irradiated from the lamp is almost the same as the first light distribution pattern P1B shown in FIG.

  As shown in FIG. 14B, the left end of the second light distribution pattern P2B is located at about 36.5 ° on the left side with respect to the vertical vertical line VU-VD of the screen, and the second light distribution pattern P2 The right end is positioned at about 36.5 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the second light distribution pattern P2B is about 3 on the lower side with respect to the horizontal horizontal line HL-HR of the screen. The lower edge of the second light distribution pattern P2B is positioned at about 9 ° below the horizontal horizontal line HL-HR of the screen. The second light distribution pattern P2B shown in FIG. 14 (B) is a light distribution pattern emitted from the vehicle lamp according to the third embodiment equipped on the right side of the vehicle, and the vehicle equipped on the left side of the vehicle. The second light distribution pattern irradiated from the lamp is almost the same as the second light distribution pattern P2B shown in FIG.

  As shown in FIG. 14C, the left end of the third light distribution pattern P3B is positioned about 11 ° on the left side with respect to the vertical vertical line VU-VD of the screen, and the right end of the third light distribution pattern P3B is The upper edge of the third light distribution pattern P3B is about 3.5 ° below the horizontal horizontal line HL-HR of the screen. The lower edge of the third light distribution pattern P3B is located at about 6 ° below the horizontal horizontal line HL-HR of the screen. The third light distribution pattern P3B shown in FIG. 14C is a light distribution pattern emitted from the vehicle lamp according to the third embodiment equipped on the right side of the vehicle, and the vehicle equipped on the left side of the vehicle. The second light distribution pattern irradiated from the lamp is almost the same as the third light distribution pattern P3B shown in FIG.

  By superimposing the first light distribution pattern P1B, the second light distribution pattern P2B, and the third light distribution pattern P3B, as shown in FIGS. 15 and 16, the lower light distribution pattern LP is horizontally below. A fog lamp light distribution pattern FP having a cut-off line CL1, a cut-off line CL5 located below the upper horizontal cut-off line CL3, and a hot zone HZ located near the cut-off line CL5 is formed. The hot zone HZ is located at the center in the left-right direction of the fog lamp light distribution pattern FP, that is, on the vertical vertical line VU-VD of the screen.

  As shown in FIG. 15, the left end of the fog lamp light distribution pattern FP is positioned at about 38 ° on the left side with respect to the vertical vertical line VU-VD of the screen, and the right end of the fog lamp light distribution pattern FP is the top and bottom of the screen. The fog lamp light distribution pattern FP is positioned at about 3.5 ° on the lower side with respect to the horizontal horizontal line HL-HR of the screen, and is positioned at about 38 ° on the right side with respect to the vertical line VU-VD. The lower edge of the fog lamp light distribution pattern FP is positioned at about 14.5 ° below the horizontal horizontal line HL-HR of the screen. The fog lamp light distribution pattern FP shown in FIG. 15 is a light distribution pattern emitted from the vehicle lamp according to the third embodiment installed on the right side of the vehicle, and from the vehicle lamp installed on the left side of the vehicle. The fog lamp light distribution pattern to be irradiated is substantially the same as the fog lamp light distribution pattern FP shown in FIG.

  From the vehicular lamp according to the third embodiment, a fog lamp light distribution pattern FP shown in FIG. 15 is irradiated in front of the vehicle. The fog lamp light distribution pattern FP shown in FIG. 15 is positioned below the passing light distribution pattern LP, and the cut-off line CL5 of the fog lamp light distribution pattern FP shown in FIG. 15 is the passing light distribution pattern LP. Are located below the cut-off lines CL1, CL2, and CL3.

  Since the vehicular lamp according to the third embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the operational effects of the vehicular lamp 1 according to the first embodiment.

  In particular, the vehicular lamp according to the third embodiment expands the L2 light, which is the light L1 from the semiconductor-type light source 4 and reflected by the first reflecting surface 5, to the left and right by the first lens 8, and the first light distribution pattern. Since P1B is formed, the brightness difference (luminance difference, illuminance difference, light amount difference) at the edge of the first light distribution pattern P1B can be reduced and blurred. For this reason, the vehicular lamp according to the third embodiment has improved visibility due to the blurring of the brightness difference of the edge of the first light distribution pattern P1B that forms the edge of the light distribution pattern FP for fog lamps. Can relieve eyestrain.

  The vehicular lamp according to the third embodiment is a direct light L1 from the semiconductor-type light source 4 disposed at or near the lens focal point FL of the second lens 9, and a light emission image of a rectangular light emitter. Since the second lens 9 spreads left and right and is formed in the first light distribution pattern P1B as the second light distribution pattern P2B, the brightness difference of the edge of the second light distribution pattern P2B can be increased and clarified. . For this reason, the vehicular lamp according to the third embodiment can prevent glare due to a clear brightness difference at the edge of the second light distribution pattern P2B that forms the cut-off line CL5 of the light distribution pattern FP for fog lamps and Visibility is improved.

  Further, in the vehicular lamp according to the third embodiment, the light L1 from the semiconductor light source 4 is converged and reflected by the second reflecting surface 6 to form the first light distribution pattern P1B and the second light distribution as the third light distribution pattern P3B. Since it is formed in the pattern P2B, a hot zone HZ is formed in the first light distribution pattern P1B and the second light distribution pattern P2B by the third light distribution pattern P3B. Moreover, in the vehicular lamp according to the third embodiment, since the hot zone HZ of the fog lamp light distribution pattern FP is located near the cutoff line CL5, an optimal light distribution pattern can be obtained as the fog lamp light distribution pattern FP. That is, the light / dark difference on the opposite side of the fog lamp light distribution pattern FP from the cut-off line CL5, that is, the lower side of the fog light distribution pattern FP gradually changes, so that the front side of the vehicle can be widely illuminated with no light / dark difference. it can. In addition, since the light / dark difference on the cut-off line CL5 side of the fog lamp light distribution pattern FP, that is, the upper side of the fog lamp light distribution pattern FP, changes significantly, glare can be prevented and distant visibility is improved.

  17 and 18 show a fourth embodiment of a vehicle lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 16 denote the same components. Hereinafter, the vehicular lamp according to the fourth embodiment will be described.

  The vehicular lamp according to the fourth embodiment is different from the vehicular lamp 1 according to the first embodiment and the vehicular lamp 1A according to the second embodiment, which form additional light distribution patterns RCP, LCP, and RCPA. The fog lamp light distribution pattern FP is substantially the same as the vehicular lamp according to the third embodiment. The components of the vehicular lamp according to the fourth embodiment are the same as the components of the vehicular lamp 1A according to the second embodiment. The second light distribution pattern P2C of the vehicle lamp according to the fourth embodiment is different from the second light distribution pattern P2B of the vehicle lamp according to the third embodiment.

  That is, as shown in FIG. 17B, the left end of the second light distribution pattern P2C is positioned at about 38 ° on the left side with respect to the vertical vertical line VU-VD of the screen, and the second light distribution pattern P2C The right end is positioned at about 38 ° on the right side with respect to the vertical vertical line VU-VD of the screen, and the upper edge of the central portion of the second light distribution pattern P2B is about downward with respect to the horizontal horizontal line HL-HR of the screen The second light distribution pattern P2C is positioned at 2.5 °, and the lower edge of the central portion of the second light distribution pattern P2C is positioned about 7.5 ° below the horizontal horizontal line HL-HR of the screen. The upper edges of the left and right ends of the P2C are positioned about 1.5 ° below the horizontal line HL-HR of the screen, and the lower edges of the left and right ends of the second light distribution pattern P2C are the horizontal lines of the screen. Located about 8.5 ° below HL-HR . The second light distribution pattern P2C shown in FIG. 17B is a light distribution pattern emitted from the vehicular lamp according to the fourth embodiment equipped on the right side of the vehicle, and the vehicle equipped on the left side of the vehicle. The second light distribution pattern irradiated from the lamp is almost the same as the second light distribution pattern P2C shown in FIG.

  In the vehicular lamp according to the fourth embodiment, the shape of the second lens 9A is different from the shape of the second lens 9 of the vehicular lamp according to the third embodiment, but other components are the same as in the first embodiment. It is the same as the component of the vehicle lamp 1 concerning. For this reason, the vehicular lamp according to the fourth embodiment has the second light distribution pattern P2C different from the second light distribution pattern P2B of the vehicular lamp according to the third embodiment, but the first light distribution pattern P1B. The third light distribution pattern P3B is the same as the first light distribution pattern P1B and the third light distribution pattern P3B of the vehicle lamp according to the third embodiment.

  By superimposing the first light distribution pattern P1B, the second light distribution pattern P2C, and the third light distribution pattern P3B, as shown in FIG. 18, a lower horizontal cut-off line CL1 below the passing light distribution pattern LP. A fog lamp light distribution pattern FPC having a cut-off line CL5 located below the upper horizontal cut-off line CL3 and a hot zone HZ located near the cut-off line CL5 is formed. The hot zone HZ is located in the horizontal center of the fog lamp light distribution pattern FPC, that is, on the vertical vertical line VU-VD of the screen.

  As shown in FIG. 18, the left end of the fog lamp light distribution pattern FPC is positioned at about 37 ° to the left with respect to the vertical vertical line VU-VD of the screen, and the right end of the fog lamp light distribution pattern FP is the top and bottom of the screen. It is located at about 37 ° on the right side with respect to the vertical line VU-VD, and the upper edge of the central portion of the fog light distribution pattern FP is about 3.5 ° below the horizontal horizontal line HL-HR of the screen. The fog lamp light distribution pattern FP is slightly warped at the upper and lower edges of the light distribution pattern FP, and is positioned about 2.5 ° below the horizontal horizontal line HL-HR of the screen. The lower edge of the central portion of the FP is located at about 12.5 ° below the horizontal horizontal line HL-HR of the screen, and the lower edges of the left and right ends of the fog lamp light distribution pattern FP are slightly warped down. Thus, it is located at about 13.5 ° below the horizontal horizontal line HL-HR of the screen. The fog lamp light distribution pattern FPC shown in FIG. 18 is a light distribution pattern irradiated from the vehicle lamp according to the fourth embodiment equipped on the right side of the vehicle, and from the vehicle lamp mounted on the left side of the vehicle. The fog lamp light distribution pattern to be irradiated is substantially the same as the fog lamp light distribution pattern FPC shown in FIG.

  From the vehicular lamp according to the fourth embodiment, a fog lamp light distribution pattern FPC shown in FIG. 18 is irradiated in front of the vehicle. The fog lamp light distribution pattern FPC shown in FIG. 18 is positioned below the passing light distribution pattern LP, and the cut-off line CL5C of the fog lamp light distribution pattern FPC shown in FIG. 18 is the passing light distribution pattern LP. Are located below the cut-off lines CL1, CL2, and CL3.

  Since the vehicular lamp according to the fourth embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the operational effects of the vehicular lamp according to the third embodiment.

  In the first, second, third, and fourth embodiments, the holder and the drive unit 3 allow the semiconductor light source 4, the first reflecting surface 5 and the second reflecting surface 6, the first lens 8, and the second lens to be used. A lamp unit 2 including lenses 9 and 9A is configured to be rotatable about a vertical axis V. However, in the present invention, the lamp unit may be fixed instead of rotating. In this case, the additional lamp light distribution patterns RCP, LCP, and RCPA, or the fog lamp light distribution patterns FP and FPC are fixed patterns without moving left and right.

  In the first, second, third, and fourth embodiments, the additional lamp light distribution patterns RCP, LCP, and RCPA, or the fog lamp light distribution patterns FP and FPC are formed. However, in the present invention, another auxiliary light distribution pattern for the main light distribution pattern other than the additional lamp light distribution pattern and the fog lamp light distribution pattern may be used.

  Further, in the first, second, third, and fourth embodiments, the passing light distribution pattern LP having the cut-off lines CL1, CL2, and CL3 is used as the main light distribution pattern. However, in the present invention, the main light distribution pattern may be a light distribution pattern other than the passing light distribution pattern, for example, a highway light distribution pattern, a traveling light distribution pattern, or the like.

  In the first, second, third, and fourth embodiments, the first reflecting surface 5 and the second reflecting surface 6 are provided on the same reflector 7. However, in this invention, you may provide a 1st reflective surface and a 2nd reflective surface in a respectively separate reflector.

  Furthermore, in the first, second, third, and fourth embodiments, the first lens 8 and the second lenses 9 and 9A are separately provided. However, in the present invention, the first lens and the second lens may be provided integrally.

  Furthermore, in the first, second, third, and fourth embodiments, the first lens 8 is a lens having a small vertical semi-cylindrical or small vertical cylindrical prism element group 15. However, in the present invention, it may be a first lens that does not have a small vertical semi-cylindrical or small vertical cylindrical prism element group. In this case, the first lens may be any lens that spreads the reflected light from the first reflecting surface to the left and right.

  In the first, second, third, and fourth embodiments, the second lenses 9 and 9A are cylindrical lenses and kamaboko lenses. However, in the present invention, the second lens may be a lens other than a cylindrical lens or a kamaboko lens. In this case, the second lens may be a lens that expands the direct light from the semiconductor-type light source to the left and right.

  Furthermore, the first, second, third, and fourth embodiments described above describe a vehicle headlamp 100 that is equipped with a projector-type headlamp 104 that uses a discharge lamp 107 as a light source. However, in the present invention, the headlamp may be a reflection type or direct-light type headlamp other than the projector type. Further, the light source may be a halogen lamp other than a discharge lamp, an incandescent lamp, a semiconductor light source, or the like. Furthermore, a vehicle headlamp may be configured independently without being equipped with a headlamp.

It is a perspective view which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is the II-II sectional view taken on the line in FIG. Similarly, it is the III-III sectional view taken on the line in FIG. Similarly, it is the IV-IV sectional view taken on the line in FIG. Similarly, it is the VV sectional view taken on the line in FIG. Similarly, it is explanatory drawing which shows a 1st light distribution pattern, a 2nd light distribution pattern, and a 3rd light distribution pattern. Similarly, it is explanatory drawing which shows the light distribution pattern for additional lamps. Similarly, it is a cross-sectional view (horizontal cross section) showing a vehicle headlamp equipped with a lamp unit and a headlamp. Similarly, it is explanatory drawing which shows the light distribution pattern for additional lamps, and the light distribution pattern for passing. It is a perspective view which shows Example 2 of the vehicle lamp concerning this invention. Similarly, it is the XI-XI sectional view taken on the line in FIG. Similarly, it is explanatory drawing which shows a 1st light distribution pattern, a 2nd light distribution pattern, and a 3rd light distribution pattern. Similarly, it is explanatory drawing which shows the light distribution pattern for additional lamps. It is explanatory drawing of the 1st light distribution pattern which shows Example 3 of the vehicle lamp concerning this invention, a 2nd light distribution pattern, and a 3rd light distribution pattern. Similarly, it is explanatory drawing which shows the light distribution pattern for fog lamps. Similarly, it is explanatory drawing which shows the light distribution pattern for fog lamps, and the light distribution pattern for passing. It is explanatory drawing of the 1st light distribution pattern which shows Example 4 of the vehicle lamp concerning this invention, a 2nd light distribution pattern, and a 3rd light distribution pattern. Similarly, it is explanatory drawing which shows the light distribution pattern for fog lamps.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Vehicle lamp 2 Lamp unit 3 Drive unit 4 Semiconductor type light source (LED)
DESCRIPTION OF SYMBOLS 5 1st reflective surface 6 2nd reflective surface 7 Reflector 8 1st lens 9, 9A 2nd lens 10 Heat sink member 11 Board | substrate 12 Light transmissive member 13 Rotating shaft 14 Through-hole 15 Prism element group 100 Vehicle headlamp 101 Lamp chamber 102 Lamp housing 103 Lamp lens 104 Head lamp 105 Reflecting surface 106 Reflector 107 Discharge lamp (light source)
108 Projection lens 109 Shade 110 Frame 111 Cap 112 Through-hole FL Lens focus of the second lens F1 Focus of the first reflecting surface P1, P1B First light distribution pattern P2, P2A, P2B, P2C Second light distribution pattern P3, P3B First 3 Light distribution patterns RCP, RCPA Right additional light distribution pattern LCP Left additional light distribution pattern CL4R, CL4RA Right additional light distribution pattern cut-off line CL4L Left additional light distribution pattern cut-off line FP, FPC Fog lamp light distribution pattern CL5, CL5C Fog lamp light distribution pattern cutoff line θ Radiation angle of light from semiconductor light source L1 Light from semiconductor light source L2 Reflected light from first reflecting surface L3 From first lens Outgoing light L4 Outgoing light from the second lens L5 Under the direction U on the direction D after reflection light F forward B from second reflective surface direction L left R right HL-HR left and right horizontal line VU-VD and below the vertical line V perpendicular axis (vertical axis or substantially vertical axis)
LP Light distribution pattern for passing CL1, CL2, CL3 Cut-off line E Elbow point

Claims (5)

In a vehicle lamp that uses a semiconductor-type light source as a light source,
The semiconductor-type light source;
A first reflecting surface and a second reflecting surface;
A first lens and a second lens;
With
The semiconductor-type light source is a semiconductor-type light source disposed at or near the lens focal point of the second lens,
The first reflection surface is a reflection surface that reflects light from the semiconductor-type light source toward the first lens,
The first lens is a lens that emits reflected light from the first reflecting surface as a first light distribution pattern that is expanded to the left and right.
The second lens is a lens that emits direct light from the semiconductor-type light source into the first light distribution pattern as a second light distribution pattern that is expanded to the left and right.
The second reflection surface is a reflection surface that reflects the light from the semiconductor-type light source into the first light distribution pattern and the second light distribution pattern as a third light distribution pattern in which the light is converged.
A vehicular lamp characterized by the above. The semiconductor light source is a semiconductor light source having a rectangular light emitter,
The first reflecting surface is provided on the upper and lower sides of the semiconductor-type light source, and is a reflecting surface of a rotating paraboloid focusing on the light emitter or the vicinity of the semiconductor-type light source,
The first lens is a lens having a prism element group, which is provided above and below the semiconductor-type light source so as to face the upper and lower first reflecting surfaces,
The second lens is provided between the upper and lower first lenses so as to face the semiconductor-type light source, and has a longitudinal cross-sectional shape that is a cross-sectional shape of an aspherical lens, and an aspherical lens cross-section that corresponds to the first aspherical lens cross-section. A cylindrical lens that is rotated about the vertical axis or nearly the vertical axis passing through the focal point of the two lenses or the vicinity thereof, or a semi-cylindrical lens that is formed by extending the cross section of the aspherical lens to the left and right,
The second reflecting surface is provided between the upper and lower first reflecting surfaces, and reflects light from the semiconductor-type light source between the upper and lower first lenses and on both the left and right sides of the second lens. Is a free-form reflective surface,
The vehicular lamp according to claim 1. A holder for holding a lamp unit comprising the semiconductor-type light source, the first reflecting surface and the second reflecting surface, and the first lens and the second lens so as to be rotatable about a vertical axis or substantially a vertical axis; ,
A drive unit for rotating the lamp unit about a vertical axis or a substantially vertical axis;
Comprising
The vehicular lamp according to claim 1 or 2. A light distribution pattern obtained by superimposing the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern includes a cut-off line that follows a cut-off line of the main light distribution pattern, and a hot zone that is located closer to the inside of the vehicle. A light distribution pattern for an additional lamp,
The vehicular lamp according to any one of claims 1 to 3. The light distribution pattern obtained by superimposing the first light distribution pattern, the second light distribution pattern, and the third light distribution pattern has a cut-off line and a light distribution for fog lamps that is located near the cut-off line. Pattern,
The vehicular lamp according to any one of claims 1 to 3.

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