JP2014107052A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture for preventing emitted light which is not subjected to light distribution control, from being emitted from connection parts of emission surfaces.SOLUTION: The vehicular lighting fixture includes a semiconductor type light source 2, and a les 3. The lens 3 consists of nine entrance surfaces 41-49 and nine emission surfaces 51-59 corresponding to each other. The adjacent emission surfaces are connected via connection parts 50. On the connection parts 50 of the nine emission surfaces 51-59, non-light-emission parts are provided. As a result, emitted light which is not subjected to light distribution control can be reliably prevented from being emitted from the connection parts 50 of the emission surfaces 51-59.

Description

  The present invention relates to a lens direct-type vehicle lamp including a semiconductor light source and a lens. In particular, the present invention relates to a vehicular lamp in which a light exit surface of a lens has a plurality of surfaces, that is, a vehicular lamp in which a lens surface is a polyhedron.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described.

  A conventional vehicular lamp includes a projection lens and a light source, and the projection lens includes a plurality of divided lens portions that are radially divided around an optical axis, and the exit surfaces of the plurality of divided lens portions. However, the entrance surfaces of the plurality of split lens portions are set so that the thicknesses and the focal points of the plurality of split lens portions are the same, and the plurality of exit surfaces are connected via the connection portions. It is connected. When the light source is turned on, light from the light source enters the plurality of split lens portions from the entrance surfaces of the plurality of split lens portions, and the incident light exits from the exit surfaces of the plurality of split lens portions to obtain a predetermined light distribution The pattern is irradiated in front of the vehicle.

JP 2012-155902 A

  In such a vehicular lamp, there is no means for controlling the light distribution of the emitted light from the connection portions of the plurality of emission surfaces of the projection lens. For this reason, in the conventional vehicular lamp, emitted light that is not subjected to light distribution control may be emitted from the connection portion of the emission surface.

  The problem to be solved by the present invention is that, in the conventional vehicular lamp, emitted light that is not subjected to light distribution control may be emitted from the connection portion of the emission surface.

  The present invention (the invention according to claim 1) includes a semiconductor-type light source and a lens, and the lens includes a plurality of incident surfaces and a plurality of emission surfaces corresponding to each other (1: 1). The adjacent emission surfaces are connected to each other via a connecting portion (bent portion), and a non-light emitting portion is provided at a connection portion of the plurality of emission surfaces.

  In the present invention (the invention according to claim 2), the plurality of incident surfaces are respectively composed of a plurality of basic incident surfaces corresponding to the plurality of output surfaces, and the adjacent basic incident surfaces are output. The surface design is such that the peripheral portions corresponding to the connection portions of the surfaces overlap, and the adjacent incident surfaces are connected in a state where the peripheral portions overlapping the adjacent basic incident surfaces are excluded. .

  In the present invention (the invention according to claim 3), the plurality of exit surfaces are constituted by planes or substantially planes, and the plurality of entrance surfaces are constituted by convex free curved surfaces projecting toward the semiconductor-type light source. It is characterized by being.

  Since the vehicular lamp according to the present invention is provided with the non-light emitting portion at the connection portion of the plurality of emission surfaces of the lens, there is no case where the emission light that is not subjected to light distribution control is emitted from the connection portion of the emission surface. . Moreover, in the vehicular lamp according to the present invention, since the connection portion of the emission surface does not shine, the plurality of emission surfaces shine independently. That is, a plurality of exit surfaces of the lens can be illuminated so as to shine in a polyhedron.

FIG. 1 is a cross-sectional view (transverse cross-sectional view, horizontal cross-sectional view, cross-sectional view taken along line II in FIG. 2, and cross-sectional view taken along line II in FIG. 3) showing an embodiment of a vehicular lamp according to the present invention. FIG. 2 is a perspective view showing a state in which the lens and the semiconductor-type light source are viewed from the exit surface side. FIG. 3 is a perspective view showing a state in which the lens and the semiconductor-type light source are viewed from the incident surface side. FIG. 4 is an explanatory cross-sectional view (a cross-sectional view corresponding to FIG. 1) showing a connection state between the non-light emitting portion of the connection portion of the emission surface and the incident surface. FIG. 5 is also an explanatory cross-sectional view (a cross-sectional view corresponding to FIG. 1) showing a connection state between the non-light emitting portion of the connection portion of the emission surface and the incident surface. FIG. 6 is an explanatory perspective view (a perspective view corresponding to FIG. 2) showing a state where a connection part of the emission surface is not illuminated and a plurality of emission surfaces are illuminated independently (a state where the polyhedral body shines). FIG. 7 is an explanatory diagram showing a high beam light distribution pattern irradiated from a lens and showing a high beam light distribution pattern by computer simulation.

  DESCRIPTION OF EMBODIMENTS Embodiments (examples) of a vehicular lamp according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In FIG. 7, “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. FIG. 7 is an explanatory diagram of an isoluminous curve showing a simplified high beam light distribution pattern on a screen drawn by computer simulation. In the explanatory diagram of the isoluminous curve, the central isoluminous curve indicates high luminous intensity, and the outer isoluminous curve indicates low luminous intensity. In this specification, front, rear, upper, lower, left, and right are front, rear, upper, lower, left, and right when the vehicular lamp according to the present invention is mounted on a vehicle.

(Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicular lamp according to this embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp (for example, a headlamp) according to this embodiment. The vehicular lamp 1 is mounted on both left and right ends of the front portion of the vehicle.

(Description of vehicle lamp 1)
1 to 3, the vehicle lamp 1 includes a lamp housing (not shown), a lamp lens (not shown), a semiconductor light source 2, a lens 3, and a heat sink member (not shown). Z)).

(Description of lamp units 2 and 3)
The semiconductor-type light source 2, the lens 3, and the heat sink member constitute a lamp unit. The lamp housing and the lamp lens define a lamp chamber (not shown). The lamp units 2 and 3 are disposed in the lamp chamber, and the lamp housing is arranged via an optical axis adjustment mechanism for vertical direction (not shown) and an optical axis adjustment mechanism for horizontal direction (not shown). Is attached.

(Description of the semiconductor-type light source 2)
As shown in FIGS. 1 to 5, the semiconductor-type light source 2 is a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL) in this example. The semiconductor light source 2 includes one or a plurality of light emitting chips (not shown), a light emitting unit (package, LED package) 20 in which the light emitting chip is sealed with a sealing resin member, and the light emitting unit 20. And a mounted substrate (not shown). When there are a plurality of the light emitting chips, they are arranged in the X-axis direction (horizontal direction).

  The substrate is fixed to the heat sink member. As a result, the semiconductor light source 2 is held (fixed) on the heat sink member. The semiconductor light source 2 is electrically connected to a power source (battery). The light emitting surface of the light emitting unit 20 of the semiconductor-type light source 2 faces the front side in the horizontal direction. The center (light emission center) O of the light emitting surface of the light emitting unit 20 is located at or near the reference focal point F of the lens 3 and on or near the reference optical axis (reference axis) Z of the lens 3. To position.

  1 to 3, X, Y, and Z constitute an orthogonal coordinate (XYZ orthogonal coordinate system). The X axis is a horizontal axis in the left-right direction that passes through the light emission center O of the light emitting unit 20, and in this embodiment, the right side is the + direction and the left side is the-direction. The Y axis is a vertical axis passing through the light emission center O of the light emitting unit 20, and in this embodiment, the upper side is the + direction and the lower side is the-direction. Further, the Z axis is a normal line (perpendicular line) passing through the light emission center O of the light emitting unit 20, that is, an axis in the front-rear direction orthogonal to the X axis and the Y axis. The side is the + direction and the rear side is the-direction.

(Description of lens 3)
1 to 5, a plurality of lenses 3 corresponding to each other (1: 1), in this example, nine incident surfaces 41, 42, 43, 44, 45, 46, 47, 48. 49 (hereinafter may be referred to as “41 to 49”) and a plurality of nine exit surfaces 51, 52, 53, 54, 55, 56, 57, 58, 59 (hereinafter referred to as “51” in this example). ˜59 ”in some cases).

  The lens 3 irradiates light directly incident from the semiconductor light source 2 in front of the vehicle as a high beam light distribution pattern HP having a hot zone HZ shown in FIG. The lens 3 is attached to the heat sink member directly or via a holder member (not shown).

(Description of exit surfaces 51-59)
The emission surfaces 51 to 59 are surfaces from which light incident on the lens 3 is emitted to the outside. In this example, the emission surfaces 51 to 59 are configured to be flat or substantially flat. Adjacent emission surfaces 51 to 59 are connected via a connecting portion 50. The connecting part 50 is a bent part made up of a corner part or a curved part.

  That is, there are four sides of the emission surface 55 at the center of the quadrangle, one side of the emission surface 52 on the quadrangle, one side of the emission surface 54 on the right of the square, and one of the emission surface 56 on the left of the quadrangle. One side of the emission surface 58 below the side and the quadrangle is connected via the connection part 50. The angle formed by the emission surface 55 at the center of the quadrangle and the emission surfaces 52, 54, 56, and 58 above, right, left, and lower of the rectangle is about 135 °. That is, the upper, right, left, and lower emission surfaces 52, 54, 56, and 58 of the quadrangle are inclined by about 45 ° toward the semiconductor-type light source 2 with respect to the emission surface 55 at the center of the rectangle. (Bent).

  Between one side of the emission surface 52 on the square and one side of the right emission surface 54 on the square, two sides of the emission surface 51 on the upper right of the square are connected via the connecting portion 50. Has been. Between one side of the emission surface 52 on the quadrangle and one side of the left emission surface 56 of the quadrangle, two sides of the emission surface 53 on the left and right of the square are connected via the connection portion 50. Has been. Two sides of the lower right exit surface 57 of the quadrangle are connected via the connecting portion 50 between one side of the exit surface 54 on the right side of the quadrangle and one side of the exit surface 58 below the quadrangle. Has been. Two sides of the lower left exit surface 59 of the quadrangle are connected via the connecting portion 50 between one side of the exit surface 56 on the left side of the quadrangle and one side of the exit surface 58 below the quadrangle. ing.

  In the connection portions 50 of the nine exit surfaces 51 to 59, there are no light emitting portions (in FIG. 6, around the white point group in the central portion of the nine exit surfaces 51 to 59, (See strip).

(Description of incident surfaces 41 to 49)
The incident surfaces 41 to 49 are surfaces on which light from the semiconductor-type light source 2 is incident into the lens 3, and are configured as convex free-form surfaces protruding toward the semiconductor-type light source 2. The nine incident surfaces 41 to 49 are respectively composed of nine basic incident surfaces (indicated by two-dot chain lines in FIGS. 4 and 5) that correspond to the nine output surfaces 51 to 59, respectively. ing. In FIG. 4 and FIG. 5, the nine basic incident surfaces are only the central basic incident surface 440, the central basic incident surface 450 in the center, and the central left basic incident surface 460 in FIG. 4 and FIG. 5. Has been.

  The adjacent basic entrance surfaces (440 and 450, or 450 and 460) are designed so that the peripheral portions corresponding to the connection portions 50 of the exit surfaces (54 and 55, or 55 and 56) overlap. ing. 4 and 5, the periphery of the basic incident surface 450 in the center (the portion from “451” to “452” in FIG. 4), the periphery of the basic incident surface 460 on the left in the center (Parts from reference numeral “461” to reference numeral “462” in FIG. 5).

  The adjacent incident surfaces are connected in a state in which a peripheral portion where the adjacent basic incident surfaces overlap is excluded. For example, as shown in FIGS. 1, 4, and 5, the entrance surface 45 in the adjacent center and the entrance surface 46 on the left in the center are the periphery of the basic entrance surface 450 in the adjacent center. The parts 451 to 452 and the peripheral parts 461 to 462 of the basic incident surface 460 on the left at the center are connected in a state where they are excluded.

(Description of non-light emitting part)
Here, the non-light emitting part will be described. As shown in FIG. 4, the light L <b> 1 emitted from the light emitting unit 20 of the semiconductor-type light source 2 enters the left end 452 of the basic incident surface 450 in the center, for example. Then, the incident light L2 is emitted to the outside as the emitted light L3 not subjected to light distribution control from the connection portion 50 between the emission surface 55 in the adjacent center and the left emission surface 56 in the center. To do.

  On the other hand, the light L10 emitted from the light emitting unit 20 of the semiconductor-type light source 2 is, for example, the left peripheral portion of the basic incident surface 450 in the center and the left basic incident surface in the center adjacent to the left side. 460 is incident on an intersection 451 (minimum surface) with the right side periphery. Then, the incident light L20 reaches a point near the emission surface 55 in the center from the connection portion 50 between the emission surface 55 in the adjacent center and the left emission surface 56 in the center. . That is, as shown in FIG. 1, the incident light L20 is radiated to the outside as emitted light L30 whose light distribution is controlled from the emission surface 55 in the center.

  Further, as shown in FIG. 5, the light L1 emitted from the light emitting unit 20 of the semiconductor-type light source 2 enters the right end 462 of the basic incident surface 460 at the center right, for example. Then, the incident light L2 is emitted to the outside as the emitted light L3 not subjected to light distribution control from the connection portion 50 between the emission surface 55 in the adjacent center and the left emission surface 56 in the center. To do.

  On the other hand, the light L11 emitted from the light emitting unit 20 of the semiconductor type light source 2 is, for example, the right peripheral portion of the basic incident surface 460 at the center left and the basic incident surface in the adjacent center. The light enters the intersection 461 (minimum surface) with the left side peripheral portion of 450. Then, the incident light L21 reaches a point near the center left exit surface 56 from the connection portion 50 between the exit surface 55 in the adjacent center and the center left exit surface 56. . That is, as shown in FIG. 1, the incident light L21 is emitted to the outside as emitted light L31 whose light distribution is controlled from the emission surface 56 at the center left.

  From the above, as shown in FIGS. 1, 4, and 5, the light L <b> 1 emitted from the light emitting unit 20 of the semiconductor light source 2 does not reach the connection unit 50 as the incident light L <b> 2. As a result, the connection part 50 enters a non-light emitting state. The connection part 50 becomes the non-light emitting part.

(Description of the operation of the embodiment)
The vehicular lamp 1 according to this embodiment is configured as described above, and the operation thereof will be described below.

  The light emitting unit 20 of the semiconductor light source 2 is caused to emit light. Then, as shown in FIG. 1, the lights L <b> 10 and L <b> 11 emitted from the light emitting unit 20 are directly incident on the lens 3 from the nine incident surfaces 41 to 49 of the lens 3. At this time, incident light L20, L21 is light distribution-controlled in nine incident surfaces 41-49. Incident light L <b> 20 and L <b> 21 entering the lens 3 exits from the nine exit surfaces 51 to 59 of the lens 3. At this time, the outgoing lights L30 and L31 are subjected to light distribution control on the nine outgoing faces 51 to 59. As shown in FIG. 7, the emitted lights L30 and L31 from the lens 3 are irradiated in front of the vehicle as a high beam light distribution pattern HP having a hot zone HZ (high luminous intensity band).

  Here, when the incident lights L20 and L21 incident on the lens 3 are emitted from the nine emission surfaces 51 to 59 of the lens 3, the connection portions 50 of the emission surfaces 51 to 59 are avoided and the 9 of the lens 3 is avoided. Outgoing light L30 and L31 is emitted to the outside from the central portion of each of the exit surfaces 51 to 59. For this reason, as shown in FIG. 6, the center part of nine exit surfaces 51-59 of the lens 3 shines, and the connection part 50 of nine exit surfaces 51-59 will be in a non-light-emission state. As a result, the nine exit surfaces 51 to 59 of the lens 3 shine independently. That is, it shines in a polyhedron (9-hedron).

(Explanation of effect of embodiment)
The vehicular lamp 1 according to this embodiment is configured and operated as described above, and the effects thereof will be described below.

  Since the vehicular lamp 1 according to this embodiment is provided with a non-light emitting portion at the connection portions 50 of the nine emission surfaces 51 to 59 of the lens 3, light distribution control is performed from the connection portion 50 of the emission surfaces 51 to 59. There is no case where the outgoing light L3 that has not been emitted is emitted. As a result, a predetermined light distribution pattern, for example, a high beam light distribution pattern HP having a hot zone HZ shown in FIG.

  Moreover, in the vehicular lamp 1 according to this embodiment, since the connection portions 50 of the emission surfaces 51 to 59 do not shine, the nine emission surfaces 51 to 59 shine independently. That is, the nine exit surfaces 51 to 59 of the lens 3 can be illuminated so as to shine in a polyhedron. Thus, in the vehicle lamp 1 according to this embodiment, as shown in FIG. 6, the central portion of the nine exit surfaces 51 to 59 of the lens 3 shines, and the connection portions of the nine exit surfaces 51 to 59 are illuminated. 50 becomes a non-light-emitting state. As a result, the nine exit surfaces 51 to 59 of the lens 3 shine independently. That is, it shines in a polyhedron (9-hedron).

  In the vehicular lamp 1 according to this embodiment, nine incident surfaces 41 to 49 are configured by nine basic incident surfaces 440, 450, and 460 that correspond to the nine exit surfaces 51 to 59, respectively. The adjacent basic incident surfaces (440 and 450, 450 and 460) overlap with the peripheral portions (451 to 452, 461 to 462) corresponding to the connection portions 50 of the emission surfaces (54 and 55, 55, 56). The peripheral surfaces (451 to 452, 461 to 462) where the adjacent incident surfaces (44 and 45, 45 and 46) overlap with the adjacent basic incident surfaces (440 and 450, 450 and 460) are designed. Connected in the excluded state. As a result, when the incident lights L20 and L21 incident on the lens 3 exit from the nine exit surfaces 51 to 59 of the lens 3, the connection portion 50 of the exit surfaces 51 to 59 is avoided and the 9 of the lens 3 is avoided. The light can be emitted to the outside as emitted light L30 and L31 from the central portion of each of the emission surfaces 51 to 59. For this reason, the connection part 50 of nine exit surfaces 51-59 of the lens 3 can be made into a non-light-emitting state reliably.

  In the vehicular lamp 1 according to this embodiment, since the nine exit surfaces 51 to 59 are configured from a flat surface or a substantially flat surface, when the central portion of the nine exit surfaces 51 to 59 of the lens 3 shines. The nine light exit surfaces 51 to 59 are shining independently, and the appearance can be improved.

  In the vehicular lamp 1 according to this embodiment, the nine incident surfaces 41 to 49 are configured by convex free-form surfaces protruding toward the semiconductor-type light source 2, so adjacent basic incident surfaces (440 and 450). , 450 and 460), it is easy to design the surface so that the peripheral portions (451 to 452, 461 to 462) overlap. Thereby, a non-light-emitting part can be reliably comprised in the connection part 50 of the nine output surfaces 51-59.

(Description of example other than embodiment)
In this embodiment, a high beam light distribution pattern HP having a hot zone HZ shown in FIG. 7 is irradiated in front of the vehicle. However, in the present invention, a light distribution pattern other than the high beam light distribution pattern HP, for example, a low beam light distribution pattern or a fog lamp light distribution pattern may be irradiated. In this case, since the connection portions of the plurality of emission surfaces are non-light emitting portions, a cut-off line such as a low beam light distribution pattern or a fog lamp light distribution pattern can be formed.

  Moreover, in this embodiment, it is comprised from the nine incident surfaces 41-49 and the nine output surfaces 51-59. However, in the present invention, the number of the entrance surface and the exit surface may be 2 to 8, 10 or more.

  Furthermore, in this embodiment, a headlamp will be described. However, in the present invention, a lamp other than the head lamp, for example, a fog lamp, a turn signal lamp, an overhead sign lamp, a stop lamp, a tail lamp, and the like may be used.

  Furthermore, in this embodiment, the incident surfaces 41 to 49 are constituted by convex free-form surfaces protruding toward the semiconductor-type light source 2 side. However, in the present invention, the incident surface is not particularly limited. For example, the incident surface may have a concave shape that is recessed on the opposite side of the semiconductor-type light source.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Semiconductor type light source 20 Light emission part 3 Lens 41, 42, 43, 44, 45, 46, 47, 48, 49 Incident surface 451,461 Intersection 452,462 End 51,52,53,54,55, 56, 57, 58, 59 Output surface 50 Connection part (non-light emitting part)
F Lens reference focus HL-HR Left and right horizontal lines HP High beam light distribution pattern HZ Hot zone L1, L10, L11 Light from light emitting part L2, L20, L21 Incident light L3, L30, L31 Emitted light O Center of light emitting chip VU-VD Vertical lines on the screen X X axis Y Y axis Z Lens reference optical axis (Z axis)

Claims (3)

A semiconductor light source and a lens;
The lens is composed of a plurality of incident surfaces and a plurality of emission surfaces corresponding to each other,
Adjacent emission surfaces are connected via a connecting portion,
A non-light emitting part is provided in the connection part of the plurality of emission surfaces,
A vehicular lamp characterized by the above. The plurality of entrance surfaces are each composed of a plurality of basic entrance surfaces corresponding to the plurality of exit surfaces, respectively.
The adjacent basic entrance surfaces are designed so that the peripheral portions corresponding to the connection portions of the exit surfaces overlap,
The adjacent incident surfaces are connected in a state in which the peripheral portion where the adjacent basic incident surfaces overlap is excluded.
The vehicular lamp according to claim 1. The plurality of exit surfaces are constituted by a plane or a substantially plane,
The plurality of incident surfaces are composed of convex free-form surfaces protruding to the semiconductor-type light source side,
The vehicular lamp according to claim 1 or 2.

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