JP4375225B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp that emits a light distribution pattern for a curved road by a plurality of lamps. Here, the plurality of lamps are lamps dedicated to curved roads (ordinary curves, intersections, roads such as cranks), and are additional lamps that are newly added separately from the headlamps.

  Conventionally, a vehicular lamp that emits a light distribution pattern for a curved road by a plurality of lamps is known (for example, Patent Document 1). Hereinafter, the vehicle lamp will be described. In addition, the code | symbol with a parenthesis respond | corresponds to patent document 1, respectively. This vehicular lamp includes three reflector units (12A), (12B), and (12C) whose light irradiation directions are set to 30 °, 45 °, and 60 ° lateral to the front (F) of the vehicle. It is. When the three reflector units (12A), (12B), and (12C) are turned on at the same time, an arrangement for a curved road that irradiates an oblique front road surface in a range of about 15 ° to 75 ° laterally with respect to the vehicle front (F) Optical patterns (Pa), (Pb), and (Pc) are obtained.

  However, in the conventional vehicle lamp described above, the optical axis (Axa) of the reflector unit (12A) on the innermost side (the center side of the vehicle) is set to be 30 ° lateral to the vehicle front (F). The optical axis (Axb) of the middle reflector unit (12B) is set at 45 ° to the front (F) of the vehicle, and the reflector unit (12C) on the outermost side (side of the vehicle) The optical axis (Axc) is set at 60 ° lateral to the vehicle front (F). For this reason, the conventional vehicle lamp is set so that the three reflector units (12A), (12B), and (12C) expand in the light irradiation direction, so that the three reflector units (12A ), (12B), and (12C) have a large storage space.

JP 2002-87153 A

  The problem to be solved by the present invention is that the storage space for the three reflector units (12A), (12B), and (12C) is wide in the conventional vehicular lamp.

  In the vehicular lamp according to the present invention, a plurality of lamps are arranged from the side of the vehicle to the center of the vehicle, and the optical axis of the lamp on the first side faces substantially parallel to the center line of the vehicle. The optical axis of the second and subsequent lamps is gradually turned toward the side of the vehicle with reference to the optical axis of the lamp on the first side.

  In the vehicular lamp according to the present invention, the plurality of lamps are arranged so as to narrow in the light emission (radiation, irradiation, projection) direction, so that the three reflector units spread in the light irradiation direction. The storage space for the plurality of lamps can be made compact compared to the set conventional vehicle lamps.

  Embodiments of a vehicular lamp according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. This embodiment describes a vehicular lamp when the vehicle (automobile) C is left-hand traffic. The vehicular lamp when the vehicle C is on the right-hand side has a structure, a light distribution pattern, and the like that are substantially reversed from side to side.

  In this specification and the drawings, the symbol “F” indicates the forward direction of the vehicle C, as viewed from the driver side. Reference sign “B” indicates a direction opposite to the forward direction of the vehicle C and the rear side as viewed from the driver side. The symbol “U” indicates the upper side as viewed from the driver side. The symbol “D” indicates the lower side as viewed from the driver side. Symbol “L” indicates the left side when the front side F is viewed from the driver side. The symbol “R” indicates the right side when the front side F is viewed from the driver side. Reference sign “HL-HR” indicates horizontal lines on the left and right on the screen 25 m ahead from which the light distribution pattern is emitted. The symbol “VU-VD” similarly indicates vertical lines on the screen 25 m ahead from which the light distribution pattern is emitted. The symbol “I” indicates the center side of the vehicle C. The symbol “O” indicates the side of the vehicle C.

  2 and 5, reference numerals 1L and 1R denote vehicle lamps in this embodiment. Hereinafter, the configuration of the vehicular lamps 1L and 1R in this embodiment will be described. The vehicle lamps 1L, 1R are composed of a plurality of, in this example, five lamps L1R, L2R, L3R, L4R, L5R, L1L, L2L, L3L, L4L, L5L, and headlamp units LU, LD. It is a so-called front combination lamp. The vehicular lamps 1L and 1R are mounted on the left and right sides of the front portion of the vehicle C. Hereinafter, the configuration of the right vehicle lamp 1R will be described. Note that the configuration of the left vehicle lamp 1L is substantially left-right symmetric (left-right reverse) with respect to the configuration of the right vehicle lamp 1R.

  As shown in FIG. 3, the vehicular lamp 1R includes a lamp housing 3 and a lamp lens 4 (for example, a plain outer lens) that define the lamp chamber 2, and the five lamps disposed in the lamp chamber 2. Lamps L1R, L2R, L3R, L4R, and L5R (hereinafter sometimes simply referred to as lamp L0), the headlamp units LU and LD, and an optical axis adjusting device.

  As shown in FIG. 4, the lamp L <b> 0 includes a semiconductor light source 5, a lens 6, an upper holder 7, and a shade lower holder 8. As the semiconductor-type light source 5, for example, a self-luminous semiconductor-type light source (LED in this embodiment) such as an LED or an EL (organic EL) is used. The semiconductor light source 5 includes a substrate 9, a light emitting body 10 of a light source chip (semiconductor chip) having a minute rectangular shape (square shape) fixed to one surface of the substrate 9, and a light transmitting member that covers the light emitting body 10. 11 and a heat radiating member (not shown) fixed to the other surface of the substrate 9. The semiconductor light source 5 is held by the upper holder 7 and the lower holder 8 so that the light emitter 10 is arranged substantially horizontally.

  The upper holder 7 is provided with an upper reflection surface 12 having a substantially spheroidal surface, while the lower holder 8 is provided with a lower reflection surface 13. The light emitter 10 is located in the vicinity of a first focal point (not shown) of the upper reflecting surface 12. Further, the lower holder 8 also serving as a shade is located in the vicinity of a second focal point (not shown) of the upper reflecting surface 12 and a focal point (not shown) of the lens 6. The upper holder 7 and the lower holder 8 hold the lens 6. The lens 6 is the light from the light emitter 10 (see the solid line arrow in FIG. 4B), and reflects the reflected light reflected by the upper reflecting surface 12 and the lower reflecting surface 13 as an optical axis ( This is a projection lens (convex lens, condenser lens) that emits to the outside in a predetermined light distribution pattern along the central axis ZZ of the lens 6. 4A is a plan view of the cornering lamp L0, FIG. 4B is a sectional view taken along line BB in FIG. 4A, and FIG. 4C is in FIG. 4A. FIG. 4D is a plan view of the semiconductor-type light source.

  The five lamps L1R, L2R, L3R, L4R, and L5R are arranged from the side O of the vehicle C to the center I of the vehicle C as shown in FIGS. The optical axis Z1-Z1 of the first lamp L1R on the first side is directed substantially parallel to the center line CL of the vehicle C. The optical axes Z2-Z2, Z3-Z3, Z4-Z4, Z5-Z5 of the second, third, fourth and fifth lamps L2R, L3R, L4R and L5R after No. 2 are the lights of the first lamp L1R. It is gradually turned to the side O of the vehicle C with reference to the axis Z1-Z1.

  With the above configuration, in the right vehicle lamp 1R, the substantially center of the first curved light distribution pattern CP1 emitted from the first lamp L1R has a vertical vertical line as shown in FIG. It is located at about 10 ° to the right R from VU-VD. Hereinafter, similarly, as shown in FIG. 6B, approximately the center of the second curved light distribution pattern CP2 emitted from the second lamp L2R is about 15 ° to the right R from the vertical vertical line VU-VD. Located at. As shown in FIG. 6 (C), the approximate center of the third curved light distribution pattern CP3 emitted from the third lamp L3R is located about 20 ° from the vertical vertical line VU-VD to the right R. To do. As shown in FIG. 6D, the approximate center of the fourth curved light distribution pattern CP4 emitted from the fourth lamp L4R is located at about 30 ° from the vertical vertical line VU-VD to the right R. To do. The approximate center of the fifth curved light distribution pattern CP5 emitted from the fifth lamp L5R is located at about 40 ° from the vertical vertical line VU-VD to the right R as shown in FIG. 6 (E). To do.

  The headlamp units LU, LD emit a basic light distribution pattern, in this example, a light distribution pattern LP for passing to the outside. The headlamp units LU, LD are composed of an upper headlamp unit group LU and a lower headlamp unit group LD respectively disposed above and below the lamps L1R, L2R, L3R, L4R, L5R. The upper headlamp unit group LU is composed of four headlamp units composed of semiconductor-type light sources such as LEDs, and mainly uses the diffused light distribution or diffused light distribution of the passing light distribution pattern LP and the light distribution of the hot zone. It is what you bear. On the other hand, the lower headlamp unit group LD is made up of three headlamp units that are also composed of semiconductor light sources such as LEDs, and the light distribution pattern LP for the passing light distribution line or the cut-off line and the hot zone light distribution. Is mainly responsible.

  The lamps L1R, L2R, L3R, L4R, L5R and the headlamp units LU, LD are composed of a mounting bracket 14, a pivot mechanism 15, a vertical optical axis adjustment mechanism 16, and a horizontal optical axis adjustment mechanism 17. It is attached to the lamp housing 3 through the common optical axis adjusting device so that the optical axis can be adjusted. That is, by the common optical axis adjusting device, the optical axes Z1-Z1, Z2-Z2, Z3-Z3, Z4-Z4, Z5-Z5 of the lamps L1R, L2R, L3R, L4R, L5R, and the head lamp unit The optical axes (not shown) of the LU and LD are adjusted integrally.

  As shown in FIG. 5, the vehicle lamps 1L and 1R in this embodiment include a headlamp switch 18, a steering angle sensor 19, a vehicle speed sensor 20, a GPS receiver 21, an imaging device 22, and a control unit 23. . The steering angle sensor 19, the vehicle speed sensor 20, the GPS receiver 21, and the imaging device 22 detect a curve radius (curve radius) of a curved path (curve) on which the vehicle C travels and output a curve radius detection signal. This is a curved radius detection device.

  The headlamp switch 18 is for turning on and off the headlamp units LU and LD by operating a driver ON and OFF. When the headlamp switch 18 is ON, it outputs an ON signal (for example, a high level signal) and is turned OFF. In this case, an OFF signal (for example, a low level signal) is output to the control unit 23.

  The steering angle sensor 19 detects a steering angle (steering angle), a steering direction, and an angular velocity of a steering handle (steering wheel, steering wheel), and outputs a steering angle signal, a steering direction signal, and an angular velocity signal to the control unit 23. Is. That is, the steering angle sensor 19 is used, for example, when the vehicle C travels on a curved road (a road with a left curve or a road with a right curve), and when the vehicle C makes a left turn or a right turn on an intersection. The steering angle (rotation angle), steering direction (rotation direction), and angular velocity (rotation speed) of the steering wheel that the driver steers are detected, and the steering angle signal, the steering direction signal, and the angular velocity signal are output to the control unit 23. Is. The steering angle signal and the steering direction signal are obtained as specific numerical data by networking the steering angle sensor 19 and the control unit 23 mounted on the vehicle C, for example. As specific numerical data, for example, numerical data of + 10 ° is obtained when the steering wheel is turned 10 ° to the right, and numerical data of −10 ° is obtained when the steering wheel is turned 10 ° to the left. As specific numerical data, for example, when the steering wheel is turned 10 ° to the right, numerical data of “990” with respect to the neutral value “1000”, while when the steering wheel is turned 10 ° to the left, It is obtained as numerical data “1010” with respect to the neutral numerical value “1000”. On the other hand, the steering angle signal and the steering direction signal are obtained as electrical signals output to the control unit 23 by the steering angle sensor 19 (for example, an optical sensor) mounted on the vehicle, for example.

  The vehicle speed sensor 20 detects the vehicle speed and outputs it to the control unit 23 as a vehicle speed signal. The GPS receiver 21 receives a position information signal output from GPS or a ground station (such as an electronic reference point) and outputs it to the control unit 23. The imaging device 22 is, for example, an imaging device of a semiconductor element such as a CCD camera or a CMOS camera mounted on the vehicle C. The imaging device 22 captures image information of a curved road on which the vehicle C travels and performs image processing. This is output to the control unit 23.

  The control unit 23 uses a computer mounted on the vehicle C, for example, a car navigation (navigation system) computer, a control circuit unit, an ECU / electronic control unit computer, or the like. The control unit 23 includes a dimming control device that outputs a dimming control signal based on a curve radius detection signal from the curved radius detection device, and the five dimming control signals from the dimming control device. The position of the hot zone HZ can be adjusted without substantially changing the range of the light distribution pattern CP for the postscript path by increasing or decreasing the output luminous flux from the lamps L1R, L2R, L3R, L4R, L5R, L1L, L2L, L3L, L4L, and L5L. A light control device (for example, a current control device) to be changed.

  Hereinafter, the operation of the vehicle lamps 1L and 1R in this embodiment will be described with reference to FIGS. 6 to 8 are explanatory diagrams of an isoluminous curve showing a simplified light distribution pattern on a screen obtained by computer simulation, where the central isoluminous curve is a high luminous intensity zone and the others This curve is the light intensity band that decreases as you go out. For example, the isoluminous curves in the center of FIGS. 6A, 6C, and 6D are 2000 (cd), and are 1000 (cd), 500 (cd), and 200 (cd) below. 6B is 5000 (cd), and hereinafter, 2000 (cd), 1000 (cd), 500 (cd), and 200 (cd). Furthermore, the isoluminous curves in the center of FIGS. 7A and 7B are 10000 (cd), and are 5000 (cd), 2000 (cd), 1000 (cd), and 200 (cd) below. Furthermore, the isoluminous curves in the center of FIGS. 8A and 8B are 20000 (cd), and are hereinafter referred to as 10000 (cd), 5000 (cd), 2000 (cd), 1000 (cd), and 200. (Cd).

  FIG. 9 and FIG. 10 are explanatory diagrams viewed from the plane of the isoilluminance curve showing the light distribution pattern on the road obtained by computer simulation in a simplified manner. The other curve is an illuminance band that decreases as it goes outside. For example, the central illuminance curve in FIGS. 9A and 9B is 70 (lx), and hereinafter, 50 (lx), 30 (lx), 20 (lx), 10 (lx), 3 ( lx). 10 (A) and 10 (B), the isoilluminance curve at the center is 100 (lx). Hereinafter, 70 (lx), 50 (lx), 30 (lx), 20 (lx), 10 ( lx) and 3 (lx).

  When the vehicle C travels, for example, on a right curve, the curve radius detection devices 19, 20, 21, and 22 detect the curve radius of the right curve and output a curve radius detection signal to the control unit 23. The dimming control device and the dimming device of the control unit 23 turn on the five lamps L1R, L2R, L3R, L4R, and L5R of the right vehicle lamp 1R based on the curve radius detection signal.

  At this time, when the curve radius of the right curve is relatively large (in the case of a shallow curve), the dimming control device and the dimming device of the control unit 23 reduce the luminous flux output from the first lamp L1R to, for example, 50%. The first curved light distribution pattern CP1 shown in FIG. 6 (A) is emitted to the right curved, and the luminous flux output from the second lamp L2R is controlled to 100%, for example, as shown in FIG. 6 (B). The second light distribution pattern CP2 shown in FIG. 6 is emitted to the right turn, and the luminous flux output from the third, fourth, and fifth lamps L3R, L4R, and L5R is controlled to 50%, for example, as shown in FIG. ), (D), and (E), the third, fourth, and fifth curved light distribution patterns CP3, CP4, and CP5 are emitted to the right curved path, respectively.

  When the first, second, third, fourth, and fifth curved light distribution patterns CP1, CP2, CP3, CP4, and CP5 are combined, the curved light distribution pattern CP shown in FIG. 7A and FIG. The light distribution pattern on the road shown in FIG. The hot zone HZ of the curved light distribution pattern CP shown in FIG. 7A is located at about 15 ° on the right side R from the vertical vertical line VU-VD. The curved light distribution pattern CP shown in FIG. 7 (A) and the light distribution pattern on the road shown in FIG. 9 (A) are light distribution patterns suitable for traveling on the right curved road having a relatively large curve radius. is there. In this way, the five lamps L1R, L2R, L3R, L4R, and L5R each bear a part (part) of the light distribution pattern CP for the curved path, and the five lamps L1R, L2R, L3R, and L4R. The first, second, third, fourth, and fifth curved light distribution patterns CP1, CP2, CP3, CP4, and CP5 obtained by L5R are overlapped to obtain the curved light distribution pattern CP.

  Further, when the headlamp switch 18 is turned on during night driving to turn on the headlamp units LU and LD, the passing light distribution pattern shown in FIG. 8A (the curved path shown in FIG. 7A) is obtained. And the light distribution pattern on the road shown in FIG. 10A (combined with the light distribution pattern on the road shown in FIG. 9A). Light distribution pattern on the road). The high luminous intensity band of 10000 (cd) of the passing light distribution pattern LP shown in FIG. 8A includes a range from the left side L of about 10 ° to the right side R of about 20 ° to the right and left horizontal lines of the vertical vertical line VU-VD. An elongated strip shape is formed on the left and right in the range from about 0 ° of HL-HR to about 3.5 ° on the lower side D. The light distribution pattern LP for passing shown in FIG. 8A and the light distribution pattern on the road shown in FIG. 10A are light distribution patterns suitable for night driving on a right curve having a relatively large curve radius. is there.

  On the other hand, for example, when the curve radius of the right curve is relatively small (in the case of a deep curve) in a sudden crank or an intersection turn, the dimming control device and the dimming device of the control unit 23 are the first and second dimming devices. The light flux output from the third, fifth lamps L1R, L2R, L3R, and L5R is controlled to 50%, for example, and the light flux output from the fourth lamp L4R is controlled to 100%, for example. The light distribution patterns for 4 and 5 curved paths are respectively emitted to the right curved path.

  When the light distribution patterns for curved paths emitted from the first, second, third, fourth, and fifth lamps L1R, L2R, L3R, L4R, and L5R are combined, the light distribution pattern CP for curved paths shown in FIG. And the light distribution pattern on the road shown to FIG. 9 (B) is obtained. The hot zone HZ of the light distribution pattern CP for curved paths shown in FIG. 7B is located at about 30 ° on the right side R from the vertical vertical line VU-VD. The light distribution pattern for curved road CP shown in FIG. 7B and the light distribution pattern on the road shown in FIG. 9B are light distribution patterns suitable for traveling on the right curved road with a relatively small curve radius. is there.

  Further, when the headlamp switch 18 is turned on during night driving to turn on the headlamp units LU and LD, the passing light distribution pattern shown in FIG. 8B (the curved path shown in FIG. 7B). And the light distribution pattern on the road shown in FIG. 10B (combined with the light distribution pattern on the road shown in FIG. 9B). Light distribution pattern on the road). The high luminous intensity band of 10000 (cd) of the passing light distribution pattern LP shown in FIG. 8B includes a range from the left side L of about 10 ° to the right side R of about 12 ° to the right and left horizontal lines of the vertical vertical line VU-VD. The range from about 0 ° of HL-HR to about 2.5 ° on the lower side D, the range from about 26 ° on the right side of the vertical vertical line VU-VD to about 34 ° on the right side, and the horizontal line HL-HR It is divided into two parts in a range from about 0.5 ° to the lower side D of about 3.5 °. Moreover, the emission ranges of 1000 (cd) and 200 (cd) of the passing light distribution pattern LP shown in FIG. 8B are 1000 (cd) and 200 (cd) of the passing light distribution pattern LP shown in FIG. It is almost the same as the emission range of 200 (cd). That is, the passing light distribution pattern LP shown in FIG. 8B has a different emission range of 1000 (cd) and 200 (cd) compared to the passing light distribution pattern LP shown in FIG. The light distribution pattern is obtained by dividing the high intensity band of 10000 (cd) into two and changing the position of one. The light distribution pattern LP for passing shown in FIG. 8B and the light distribution pattern on the road shown in FIG. 10B are light distribution patterns suitable for night driving on a right curve having a relatively small curve radius. is there.

  If the curve radius of the right curve is different, the control unit 23 matches the luminous flux output of the five lamps L1R, L2R, L3R, L4R, and L5R of the right vehicle lamp 1R with the curve radius of the right curve. Control. For this reason, a curved light distribution pattern CP and a passing light distribution pattern LP suitable for right-curve traveling and night-time right-curved traveling with different curve radii are obtained. Also, in the case of traveling on the left curved road, as in the case of traveling on the right curved road, the light distribution pattern for the curved road and the light distribution for passing which are suitable for the left curved road traveling and the left curved road traveling at night are used. Each pattern is obtained.

  Here, when the optical axis adjustment mechanism 16 in the vertical direction is operated, the optical axes Z1-Z1, Z2 of the five lamps L1R, L2R, L3R, L4R, and L5R of the right vehicle lamp 1R through the mounting bracket 14. -Z2, Z3-Z3, Z4-Z4, Z5-Z5, and the optical axes (not shown) of the headlamp units LU, LD form the center of the pivot mechanism 15 and the center of the optical axis adjustment mechanism 17 in the left-right direction. It is adjusted by rotating up and down around the horizontal axis. On the other hand, when the optical axis adjustment mechanism 17 in the left-right direction is operated, the optical axes Z1-Z1 of the five lamps L1R, L2R, L3R, L4R, and L5R of the right vehicle lamp 1R are similarly connected via the mounting bracket 14. Z2-Z2, Z3-Z3, Z4-Z4, Z5-Z5 and the optical axis of the headlamp unit LU, LD and the vertical axis connecting the center of the pivot mechanism 15 and the center of the vertical optical axis adjustment mechanism 16 It is adjusted by rotating left and right.

  Hereinafter, effects of the vehicle lamps 1L and 1R in this embodiment will be described. The vehicle lamps 1L and 1R in this embodiment are arranged with five lamps L1R, L2R, L3R, L4R, and L5R from the side O of the vehicle C to the center I of the vehicle C as shown in FIG. Directing the optical axis Z1-Z1 of the first lamp L1R on the first side side substantially parallel to the center line CL of the vehicle C, the second, third, fourth and fifth lamps L2R, L3R after the second, The optical axes Z2-Z2, Z3-Z3, Z4-Z4, and Z5-Z5 of L4R and L5R are gradually turned toward the side O of the vehicle C with reference to the optical axis Z1-Z1 of the first lamp L1R. is there. As a result, the vehicular lamps 1L and 1R in this embodiment can be arranged so that the five lamps L1R, L2R, L3R, L4R, and L5R become narrower in the light emission direction as shown in FIG. Therefore, compared with the above-described conventional vehicular lamp in which the three reflector units (12A), (12B), and (12C) are set so as to expand in the light irradiation direction, five lamps L1R and L2R are provided. , L3R, L4R, L5R storage space can be made compact. In particular, as in the vehicle lamps 1L and 1R of this embodiment, the horizontal cross section (transverse cross section) of the lamp lens 4 is slanted (inclined or curved) from the center side I of the vehicle C to the side side O of the vehicle C. It is most suitable for storing five lamps L1R, L2R, L3R, L4R, and L5R in the lamp chamber 2 of the vehicle lamp.

  Further, as shown in FIG. 1, the vehicle lamps 1L and 1R in this embodiment are arranged so that the five lamps L1R, L2R, L3R, L4R, and L5R become narrower as they go in the light emitting direction. The gaps among L1R, L2R, L3R, L4R, and L5R can be eliminated, and the appearance when the inside of the lamp chamber 2 is viewed from the outside is improved accordingly.

  Furthermore, the vehicle lamps 1L and 1R in this embodiment are configured so that the optical axis Z1-Z1 of the first lamp L1R on the first lateral side is substantially parallel to the center line CL of the vehicle C, as shown in FIG. The optical axes Z2-Z2, Z3-Z3, Z4-Z4, Z5-Z5 of the second, third, fourth, and fifth lamps L2R, L3R, L4R, and L5R after No. 2 are changed to the optical axes of the first lamp L1R. Since the light is gradually directed toward the side O of the vehicle C with respect to Z1-Z1, the light distribution pattern CP for the curved path, particularly, the light distribution on the side O of the vehicle C is efficiently formed. Can do. For this reason, the vehicular lamps 1L and 1R in this embodiment can obtain the light distribution pattern CP for the curved road that spreads to the side O of the vehicle C, and the visibility during traveling on the curved road is reliably ensured. It can contribute to road safety.

  Furthermore, the vehicular lamps 1L and 1R in this embodiment have optical axes Z1-Z1, Z2-Z2, Z3-Z3 of five lamps L1R, L2R, L3R, L4R, L5R, as shown in FIG. Since Z4-Z4 and Z5-Z5 cross, the hot zone HZ in the curved light distribution pattern CP can be efficiently formed. Moreover, in the vehicle lamps 1L and 1R in this embodiment, the control unit 23 has five lamps L1R, L2R, L3R, and L4R based on the curve radius detection signals from the curve radius detection devices 19, 20, 21, and 22. The position of the hot zone HZ can be changed without substantially changing the range of the light distribution pattern CP for the curved path and the light distribution pattern LP for the passing path by increasing / decreasing the output light flux from the L5R. For this reason, the vehicular lamps 1L and 1R in this embodiment can easily form the hot zone HZ at a desired position in the light distribution pattern CP for the curved road, and for the curved road having excellent visibility. It is optimal to form the light distribution pattern CP.

  Furthermore, since the vehicle lamps 1L and 1R in this embodiment use the semiconductor-type light source 5 as the light source of the lamp L0, they are optimal for controlling the light flux output of the lamp L0. Therefore, the vehicular lamps 1L and 1R in this embodiment accurately adjust the position of the hot zone HZ of the curved light distribution pattern CP and the passing light distribution pattern LP according to the curve radius of the curved road. Since it can be changed, it is possible to obtain a light distribution pattern CP for a curved road and a light distribution pattern LP for passing which are excellent in visibility, which can contribute to traffic safety.

  Furthermore, the vehicular lamps 1L, 1R in this embodiment have a common optical axis adjusting device 14 that uses the optical axes of the headlamp units LU, LD and the optical axes of the five lamps L1R, L2R, L3R, L4R, L5R. , 15, 16, and 17 so that when adjusting the optical axes of the headlamp units LU and LD, the optical axes of the five lamps L1R, L2R, L3R, L4R, and L5R are also simultaneously adjusted. Therefore, there is no possibility that the light distribution is disturbed in the passing light distribution pattern LP obtained by synthesizing the curved light distribution pattern CP. For this reason, the vehicular lamps 1L and 1R in this embodiment can always obtain the passing light distribution pattern (passing light distribution pattern CP obtained by synthesizing the curved light distribution pattern CP) LP according to the light distribution design. Can contribute to road safety.

  FIG. 11 is an explanatory view showing a modification of the semiconductor light source used for the lamp. The semiconductor-type light source 50 according to this modification has a plurality of light-emitting bodies 100 of light source chips (semiconductor chips) having a small rectangular shape (square shape), and in this example, four are mounted in a square shape. When the semiconductor-type light source 50 on which the plurality of light emitters 100 are mounted is used, the number of lamps can be reduced from five to four as shown in FIG. Is cheaper. In addition, by using the semiconductor-type light source 50 on which the four light emitters 100 are mounted, the light distribution patterns for the curved parts of a plurality of parts can be smoothly and continuously even if the number of lamps is reduced from five to four. Therefore, the combined light distribution pattern CP for the entire curved path without uneven light distribution can be obtained.

  FIG. 12 is an explanatory view showing a vehicular lamp 10R in which four lamps are arranged. In this vehicular lamp 10R, the optical axis Z11-Z11 of the first lamp L11R on the first side is directed substantially parallel to the center line CL of the vehicle C. The optical axes Z12-Z12, Z13-Z13, Z14-Z14 of the second, third, and fourth lamps L12R, L13R, and L14R after the second are based on the optical axis Z11-Z11 of the first lamp L11R. It is gradually turned to the side O of. And the optical axis Z13-Z13 of the 3rd lamp L13R is largely turned to the side O from the optical axis Z12-Z12 of the 2nd lamp L12R. Further, the optical axis Z14-Z14 of the fourth lamp L14R is more largely directed toward the side O than the optical axis Z13-Z13 of the third lamp L13R.

  The vehicle lamp 10R including the four lamps L11R, L12R, L13R, and L14R has substantially the same function and effect as the vehicle lamps 1L and 1R including the five lamps L1R, L2R, L3R, L4R, and L5R. Can be achieved. In particular, by using the semiconductor-type light source 50 on which a plurality of light emitters 100 are mounted as the light source, it is possible to achieve the same effects as the vehicular lamps 1L and 1R.

  In this embodiment, a so-called front combination lamp composed of five lamps L1R, L2R, L3R, L4R, L5R, L1L, L2L, L3L, L4L, L5L and a headlamp unit LU, LD. A vehicle lamp will be described. However, in the present invention, a vehicular lamp having a plurality of lamps alone may be used.

  In this embodiment, the basic light distribution pattern emitted from the headlamp units LU and LD is described as a light distribution pattern LP for passing. However, in the present invention, the basic light distribution pattern emitted from the headlamp may be a motorway light distribution pattern or a travel light distribution pattern.

  Further, in this embodiment, an LED will be described as the semiconductor light sources 5 and 50. However, in the present invention, EL (organic EL) may be used as the semiconductor light source.

  Furthermore, in this embodiment, semiconductor-type light sources 5 and 50 are used as the light source. However, in the present invention, a halogen bulb, an incandescent bulb, or the like may be used as the light source.

It is explanatory drawing which shows the Example of the vehicle lamp concerning this invention. It is a top view which similarly shows the vehicle equipped with the vehicle lamp. It is a front view of the state which removed the lamp lens similarly. It is explanatory drawing which similarly shows a lamp. It is a block diagram which similarly shows the structure of a vehicle lamp. It is explanatory drawing which similarly shows the light distribution pattern for curved paths on a screen radiate | emitted from each cornering lamp. It is explanatory drawing which shows the light distribution pattern for curved paths on the screen which synthesize | combined the light distribution pattern for curved paths similarly emitted from five cornering lamps. It is explanatory drawing which shows the light distribution pattern for passing on the screen where the light distribution pattern for curved paths was similarly synthesize | combined. It is explanatory drawing which shows the light distribution pattern for curved roads on the road which synthesize | combined the light distribution pattern for curved roads similarly emitted from five cornering lamps. It is explanatory drawing which shows the light distribution pattern for passing on the road where the light distribution pattern for curved roads was similarly synthesize | combined. It is explanatory drawing which shows the modification of a semiconductor type plateau. It is explanatory drawing which shows the vehicle lamp which consists of four lamps.

Explanation of symbols

1L, 1R, 10R Vehicle lamp 2 Lamp chamber 3 Lamp housing 4 Lamp lens 5, 50 Semiconductor type light source 6 Lens 7, 8 Holder 9 Substrate 10, 100 Light emitter 11 Light transmitting member 12, 13 Reflecting surface 14 Mounting bracket 15 Pivot Mechanism 16 Vertical optical axis adjustment mechanism 17 Horizontal optical axis adjustment mechanism 18 Head lamp switch 19 Steering angle sensor 20 Vehicle speed sensor 21 GPS receiver 22 Imaging device 23 Control unit C Vehicle F Front side B Rear side U Upper side D Lower side L Left side R Right side I Center side of vehicle O Side side of vehicle CL Center line of vehicle HL-HR Left and right horizontal lines VU-VD Up and down vertical lines L0 lamps L1R and L11R Right side first lamps L2R and L12R Right side second lamps L3R, L13R Right third lamp L4R, L14R Right Fourth lamp L5R Right fifth lamp L1L Left first lamp L2L Left second lamp L3L Left third lamp L4L Left fourth lamp L5L Left fifth lamp LU, LD Headlamp unit LP Light distribution for passing Pattern CP Light distribution pattern for the curved path CP1 Light distribution pattern for the first curved path CP2 Light distribution pattern for the second curved path CP3 Light distribution pattern for the third curved path CP4 Light distribution pattern for the fourth curved path CP5 For the fifth curved path Light distribution pattern HZ Hot zone ZZ Optical axis Z1-Z1, Z11-Z11 First optical axis Z2-Z2, Z12-Z12 Second optical axis Z3-Z3, Z13-Z13 Third optical axis Z4-Z4, Z14- Z14 4th optical axis Z5-Z5 5th optical axis

Claims (4)

In a vehicular lamp that emits a light distribution pattern for a curved road by a plurality of lamps,
The plurality of lamps are arranged from the side of the vehicle to the center of the vehicle,
The optical axis of the lamp on the side of No. 1 is substantially parallel to the center line of the vehicle,
The optical axis of the lamp after No. 2 is gradually turned to the side of the vehicle with reference to the optical axis of the lamp on the first side.
A vehicular lamp characterized by the above. A curve radius detection device that detects a curve radius of a curved path on which the vehicle travels and outputs a curve radius detection signal;
A dimming control device that outputs a dimming control signal based on a curve radius detection signal from the curve radius detection device;
A light control device for changing the position of the hot zone without substantially changing the range of the light distribution pattern for the curved path by increasing or decreasing the output light flux from the plurality of lamps based on the light control signal from the light control device When,
The vehicular lamp according to claim 1, further comprising: The plurality of lamps are:
A semiconductor light source composed of one or a plurality of light emitters;
A reflecting surface for reflecting light from the light emitter;
A lens that emits reflected light from the reflecting surface to the outside as a light distribution pattern for a part that bears a part of the light distribution pattern for the curved path;
The vehicular lamp according to claim 1, wherein the vehicular lamp is a projector-type lamp unit. A headlamp for emitting a basic light distribution pattern to the outside,
A common optical axis adjusting device for integrally adjusting the optical axis of the headlamp and the optical axes of the plurality of lamps;
The vehicular lamp according to any one of claims 1 to 3, wherein the vehicular lamp is provided.

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