JP2006024509A - Vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that in a conventional vehicular lighting fixture, the center part is not suitable for obtaining a light distribution pattern of a high light intensity. <P>SOLUTION: Two light emitting units 21, 22 for the lighting fixture are arranged vertically symmetrically holding the horizontal axis H-H between them. As a result of this, the light distribution pattern P1 (P2) obtained by a piece of light emitting unit 21 (22) for the lighting fixture is obtained as a light distribution pattern P in which the two are symmetrically synthesized. Since the two pieces of light distribution patterns P1 (P2) are symmetrically synthesized as for this light distribution pattern P, it has a high light intensity zone at the center part, and becomes to have a long light distribution pattern in the right and left on the horizontal line HL-HR. In this way, it has the high lighting intensity zone at the center part and is suitable to obtain the light distribution pattern P which is long in the right and left on the horizontal line. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular lamp that uses two light-emitting units for a lamp as a set. In particular, the present invention is a vehicular lamp such as a daytime running lamp (daylight), a high beam lamp, a fog lamp, a turn signal lamp, etc., and has a high luminous intensity zone at the center and is long on the horizontal line from side to side. The present invention relates to a vehicular lamp that is suitable for obtaining a light distribution pattern.

  This type of vehicular lamp is conventionally 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. The vehicle lamp (10) uses two lamp light emitting units (1) as a set, and the lamp light emitting unit (1) includes an LED lamp (2) as a light source, It comprises a reflecting surface (3, 4, 5, 6) for reflecting light from the LED lamp (2) in a predetermined direction. When the LED lamp (2) is turned on to emit light, the light from the LED lamp (2) is reflected by the reflecting surfaces (3, 4, 5, 6). The reflected light reflected by the reflecting surfaces (3, 4, 5, 6) is irradiated to the outside with a predetermined light distribution pattern.

  However, the conventional vehicular lamp has a problem that it has a high luminous intensity zone at the center and is not suitable for obtaining a light distribution pattern that is long on the horizontal line from side to side.

JP 2001-332104 A

  The problem to be solved by the present invention is that the conventional vehicular lamp is not suitable for obtaining a light distribution pattern having a high luminous intensity zone at the center and a long left and right on the horizontal line.

  The present invention is characterized in that two light emitting units for lamps are arranged above and below across a horizontal axis.

  In the vehicle lamp of the present invention, two light-emitting units for lamps are arranged above and below the horizontal axis, so that a light distribution pattern obtained by one light-emitting unit for lamps is vertically moved across the horizontal axis. Is obtained as a light distribution pattern synthesized symmetrically. This composite light distribution pattern is a composite of two light distribution patterns symmetrically vertically with a horizontal axis in between, so it has a high luminous intensity zone at the center and a long light distribution on the left and right on the horizontal line. It becomes a pattern. As described above, the vehicular lamp according to the present invention is suitable for obtaining a light distribution pattern having a high luminous intensity zone at the center and a long left and right on the horizontal line.

  Hereinafter, two 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 drawings, the symbol “F” indicates the front side of the vehicle (the forward direction side of the vehicle). The symbol “B” indicates the rear side of the vehicle. Reference sign “U” indicates an upper side of the front side as viewed from the driver side. The symbol “D” indicates the lower side when the front side is viewed from the driver side. The symbol “L” indicates the left side when the front side is viewed from the driver side. The symbol “R” indicates the right side when the front side 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. The symbol “HH” indicates a horizontal axis. 3 to 5, FIG. 12, and FIG. 13 are explanatory diagrams of an isoluminous curve that shows a simplified light distribution pattern on a screen obtained by computer simulation. It is a high luminous intensity zone, and the other curves are luminous intensity zones that become lower as going outward.

  1 to 5 show Example 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp in the first embodiment will be described. In the figure, reference numeral 1 denotes a vehicular lamp in the first embodiment. The vehicular lamp 1 includes two lamp light emitting units 21 and 22 arranged vertically symmetrically with a horizontal axis HH interposed therebetween.

  The two light emitting units 21 and 22 for lamps are composed of LEDs 31 and 32 as light sources and reflectors 41 and 42. The LEDs 31 and 32 are composed of substrates 51 and 52 and light emitting units 61 and 62. Further, the color temperature of light of the LEDs 31 and 32 is as high as about 5000 ° K, for example. The reflectors 41 and 42 are provided with reflecting surfaces 71 and 72, respectively, on which predetermined light distribution patterns P1 and P2 are obtained by reflecting light from the light emitting portions 61 and 62 of the LEDs 31 and 32 in a predetermined direction. ing. The reflecting surfaces 71 and 72 are reflecting surfaces based on a parabola, such as a rotating paraboloid, an elliptical paraboloid, a combination of parabolic pillar surfaces, and a free-form surface (NURBS surface) based on a paraboloid. It consists of a reflective surface. The NURBS surface 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).

  The LED 31 and 32 and the reflectors 41 and 42 as the components of the vehicle lamp 1, that is, the two light emitting units 21 and 22 for the lamp, are an outer lens or an outer cover (not shown) and a lamp housing (not shown). ) And a lamp housing (not shown) and attached to the lamp housing.

  Hereinafter, the operation of the vehicular lamp 1 according to the first embodiment will be described. First, the light-emitting portions 61 and 62 of the LEDs 31 and 32 are turned on. Then, the light radiated | emitted from the light emission parts 61 and 62 of LED31 and 32 is reflected by the reflective surfaces 71 and 72. FIG. This reflected light is irradiated to the outside with predetermined light distribution patterns P1 and P2.

  That is, as shown in FIG. 3, the light distribution pattern P1 obtained by the upper light emitting unit 21 for lamps is between about 12 ° on the left side and about 12 ° on the right side, and from about 2 ° on the upper side to about 1 ° on the lower side. In the range between about 7 ° on the left side to about 7 ° on the left side and about 2 ° on the lower side to about 7 ° on the lower side, and the horizontal line HL− The light distribution pattern is long on the left and right on the HR.

  On the other hand, as shown in FIG. 4, the light distribution pattern P2 obtained by the lower light emitting unit 22 for lamps is between about 7 ° on the left side and about 7 ° on the right side, and from about 7 ° on the upper side to about 2 ° on the upper side. In the range between about 12 ° on the left side and about 12 ° on the right side, and between about 1 ° on the upper side and about 2 ° on the lower side, and the horizontal line HL− The light distribution pattern is long on the left and right on the HR.

  The light distribution pattern P1 obtained by the upper lamp light-emitting unit 21 and the light distribution pattern P2 obtained by the lower lamp light-emitting unit 22 are represented by the horizontal line HL-HR as shown in FIGS. A symmetrical shape is formed across the top and bottom. When the light distribution pattern P1 obtained by the upper lamp light emitting unit 21 shown in FIG. 3 and the light distribution pattern P2 obtained by the lower lamp light emitting unit 22 shown in FIG. 4 are combined, FIG. The light distribution pattern P shown is obtained. The light distribution pattern P shown in FIG. 5 has a high luminous intensity band in the center (between about 16 ° on the left side and about 16 ° on the right side and about 7 ° on the upper side and about 7 ° on the lower side). In addition, the light distribution turn is long on the left and right on the horizontal line HL-HR.

  Hereinafter, effects of the vehicular lamp 1 according to the first embodiment will be described. The vehicular lamp 1 according to the first embodiment has two lamp light-emitting units 21 and 22 arranged vertically symmetrically with the horizontal axis H-H interposed therebetween, thereby providing one lamp light-emitting unit, for example, an upper side. 3 obtained by the light emitting unit 21 for lamps (or the light distribution pattern P2 shown in FIG. 4 obtained by the light emitting unit 22 for lower lamps) sandwiching the horizontal axis HL-HR. Is obtained as a light distribution pattern P shown in FIG. The combined light distribution pattern P shown in FIG. 5 is symmetrical with the two light distribution patterns P1 shown in FIG. 3 (or the two light distribution patterns P2 shown in FIG. 4) vertically across the horizontal axis HL-HR. And has a high luminous intensity zone in the center (between about 16 ° on the left side and about 16 ° on the right side and about 7 ° on the upper side and about 7 ° on the lower side), and The light distribution pattern is long on the left and right on the horizontal line HL-HR. As described above, the vehicular lamp 1 according to the first embodiment is suitable for obtaining the light distribution pattern P shown in FIG. 5 that has a high luminous intensity zone at the center and is long on the horizontal line HL-HR.

  In particular, as shown in FIG. 5, the vehicular lamp 1 according to the first embodiment has a range between about 16 ° on the left side and about 16 ° on the right side and about 7 ° on the upper side and about 7 ° on the lower side. That is, since a light distribution turn P having a high luminous intensity zone on the left and right horizontal lines is obtained, a daytime running lamp (daytime lamp), a high beam lamp (running beam lamp), an auxiliary high beam lamp, a fog lamp, a turn signal lamp, etc. Suitable for vehicle lamps.

  Moreover, since the vehicular lamp 1 according to the first embodiment reflects most of the light of the LEDs 31 and 32 with the reflecting surfaces 71 and 72, the reflecting surfaces 71 and 72 can be shined to be conspicuous. In addition, since the direct light from the LEDs 31 and 32 is irradiated to the outside, the LEDs 31 and 32 themselves can be lit to stand out. As a result, the vehicular lamp 1 according to the first embodiment is conspicuous, and by using the LEDs 31 and 32 having a high color temperature of about 5000 ° K, the light emitted to the outside is white and sunlight. It stands out well and is suitable for daytime running lamps (daytime lights). Since the amount of direct light from the LEDs 31 and 32 is small, there is no possibility of giving glare.

  FIG. 6 shows a first modification of the first embodiment. The vehicular lamp 1A according to the first modification has an upper lamp light-emitting unit 21 and a lower lamp light-emitting unit 22 that are shifted in the left and right LR directions along the horizontal axis HH. It is. In the vehicular lamp 1A according to the first modification, the upper and lower lamp light emitting units 21 and 22 are shifted to the left and right, so that the LEDs 31 and 32 are shifted to the left and right. As a result, the LEDs 31 and 32 The heat dissipation effect is improved.

  FIG. 7 shows a second modification of the first embodiment. The vehicular lamp 1B according to the second modification is one in which the upper and lower sides of the upper lamp light emitting unit 21 and the lower lamp light emitting unit 22 are arranged upside down. In the vehicular lamp 1B according to the second modification, the upper and lower lamp light emitting units 21 and 22 are arranged upside down, so that the LEDs 31 and 32 are located away from each other. The effect is improved.

  By adjusting the reflection surfaces 71 and 72 of the vehicle lamp 1A in the first modification and the reflection surfaces 71 and 72 of the vehicle lamp 1B in the second modification, the light distribution pattern P1 shown in FIGS. , P2, and P are obtained.

  The vehicular lamps 1, 1A, 1B are configured by arranging two light-emitting units for lamps 21, 22 symmetrically vertically with respect to the horizontal axis H-H. Here, the upper and lower two light emitting units 21 and 22 for lamps may be used as one set, and a plurality of upper and lower two light emitting units 21 and 22 for lamps may be used.

  FIGS. 8-13 shows Example 2 of the vehicle lamp concerning this invention. Hereinafter, the configuration of the vehicular lamp in the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 7 denote the same components.

  In the figure, reference numeral 1C denotes a vehicular lamp in the second embodiment, and in this example, a daytime running lamp (daytime lamp). Reference numeral 10 denotes a headlamp. The vehicular lamp 1 </ b> C and the headlamp 10 are disposed in a lamp chamber 13 partitioned by an outer lens 11 and a lamp housing 12, and are attached to the lamp housing 12. Thus, the vehicle lamp 1C and the headlamp 10 constitute a front combination lamp.

  The vehicular lamp 1C uses two sets of light emitting units 2 for lamps as one set. In other words, the vehicular lamp 1C uses four lamp light emitting units 2. One set of two light-emitting units 2 for lamps are arranged symmetrically up and down across the horizontal axis.

  The light emitting unit 2 for lamps includes an LED 3 as a light source and a reflector 4. The LED 3 includes a substrate 5 and a light emitting unit 6. Further, the color temperature of the light of the LED 3 is as high as about 5000 ° K, for example. The reflector 4 covers the light emitting part 6 of the LED 3 from the upper part to the left and right side parts and the rear part, and has an opening on the front side of the light emitting part 6. Reflectors 73, 74, 75, 76, on which the predetermined light distribution pattern P3 shown in FIGS. 11 and 12 is obtained by reflecting the light from the light emitting portion 6 of the LED 3 in a predetermined direction on the reflector 4. 77 and 78 are provided. The reflective surfaces 73 to 78 are reflective surfaces based on a parabola, such as a combination of a rotating paraboloid, an elliptical paraboloid, a parabolic column surface, and a free-form surface (NURBS surface) based on a paraboloid. It consists of a reflective surface. The NURBS surface 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).

  That is, the reflection surfaces 73 to 78 are divided into six parts in total, two stages in the vertical direction and three levels in the horizontal direction. The central lower reflective surface 73 condenses and reflects light having the largest light quantity (light flux density) out of the light from the LED 3 to form a high luminous intensity zone HZ1 on the upper side of the central portion shown in FIG. Further, the central upper reflective surface 74 condenses and reflects the light having the second highest light quantity (light flux density) out of the light from the LED 3, and similarly to the central lower reflective surface 73, the central central surface shown in FIG. Forming a high luminous intensity zone HZ2 below the portion. Furthermore, the lower left and right reflecting surfaces 75 and 76 diffuse and reflect light having the second light quantity (light flux density) out of the light from the LED 3 to form a light distribution pattern P3 shown in FIG. Furthermore, the left and right upper reflective surfaces 77 and 78 diffuse and reflect the light with the smallest light quantity (light flux density) out of the light from the LED 3, as in the lower reflective surfaces 75 and 76, as shown in FIG. A light distribution pattern P3 is formed. That is, the reflection surfaces 73 to 78 are at least vertically divided into three. The reflection surfaces 73 and 74 in the center are condensing reflection surfaces that form the high luminous intensity bands HZ1 and HZ2 that are substantially inverted triangles. The reflection surfaces 75 to 78 on both the left and right side portions are diffuse reflection surfaces that form a light distribution pattern P3 having a substantially inverted triangle that is long on the left and right on the horizontal line HL-HR.

  Hereinafter, the operation of the vehicular lamp 1C in the second embodiment will be described. First, the light-emitting portions 6 of the LEDs 3 of the four lamp light-emitting units 2 are turned on. Then, the light radiated | emitted from the light emission part 6 of LED3 is reflected by the reflective surfaces 73-78. This reflected light is irradiated to the outside with a predetermined light distribution pattern P3.

  That is, the reflected light reflected by the reflecting surface 73 at the lower center of the center is the light having the largest amount of light from the LEDs 3 and is condensed to form the high luminous intensity band HZ1 on the upper side of the central portion shown in FIG. To do. The reflected light reflected by the central upper reflective surface 74 is the light having the second largest amount of light from the LED 3 and is condensed in the same manner as the reflected light from the central lower reflective surface 73. Thus, a high luminous intensity zone HZ2 below the central portion shown in FIG. 11 is formed. Further, the reflected light reflected by the lower left and right reflecting surfaces 75 and 76 is the light with the second smallest light amount among the light from the LED 3, and is diffused to form the light distribution pattern P3 shown in FIG. Furthermore, the reflected light reflected by the left and right upper reflective surfaces 77 and 78 is the light having the smallest light amount among the light from the LED 3, and is diffused in the same manner as the reflected light of the lower reflective surfaces 75 and 76. Thus, the light distribution pattern P3 shown in FIG. 11 is formed.

  As shown in FIG. 12, the light distribution pattern P3 obtained by the lamp light emitting unit 2 arranged on the upper side shown in FIG. 9 and FIG. 10 is between about 6 ° on the left side and about 6 ° on the right side and about 0 on the upper side. This is a light distribution pattern of an inverted triangle having a high luminous intensity band of an approximately inverted triangle in a range between .5 ° and approximately 7 ° on the lower side and long on the horizontal line HL-HR. On the other hand, the light distribution pattern obtained by the light emitting unit 2 for lamps arranged on the lower side is not shown, but the light distribution pattern P3 shown in FIG. 12 is symmetrical with respect to the vertical line across the horizontal line HL-HR, that is, The light distribution pattern is a triangular light distribution pattern having a substantially triangular high luminous intensity band and long on the horizontal line HL-HR.

  Then, the light distribution pattern P3 obtained by each of the two lamp light emitting units 2 arranged on the upper side and the light distribution pattern obtained by each of the two lamp light emitting units 2 arranged on the lower side (not shown) When the light distribution pattern P3 shown in FIG. 12 is combined with a light distribution pattern symmetrical in the vertical direction across the horizontal line HL-HR, a light distribution pattern P0 shown in FIG. 13 is obtained. The light distribution pattern P0 shown in FIG. 13 has a substantially diamond-shaped high luminous intensity at the center (between about 11 ° on the left side and about 11 ° on the right side and about 8 ° on the upper side and about 8 ° on the lower side). It is a substantially rhombic light distribution turn that has a band and is long on the left and right on the horizontal line HL-HR.

  Hereinafter, effects of the vehicular lamp 1C according to the second embodiment will be described. The vehicle lamp 1C according to the second embodiment can achieve the same effect as the vehicle lamp 1 according to the first embodiment.

  In particular, the vehicular lamp 1C according to the second embodiment divides the reflecting surface into six parts, and the reflecting surfaces 73 and 74 close to the LED 3 collect and reflect light having a large amount of light from the LED 3 so that it is substantially triangular or The high luminous intensity bands HZ1 and HZ2 that are substantially inverted triangles are formed. On the other hand, light having a small amount of light out of the light from the LED 3 is diffusely reflected by the reflection surfaces 75 to 78 away from the LED 3, and is long on the horizontal line HL-HR. The outline of the light distribution pattern P3 having a substantially triangular or inverted triangular shape is formed. For this purpose, the vehicular lamp 1C according to the second embodiment has an approximately rhombus-like high luminous intensity zone by disposing two light-emitting units 2 for the lamps at the top and bottom and It is possible to reliably obtain a long diamond-shaped light distribution turn. This almost diamond-shaped high luminous intensity zone is wide on the left and right in the center, and narrow on the left and right in the upper and lower parts, particularly the lower part (that is, the front side). Since it can illuminate at low light intensity, it is most suitable for the light distribution pattern of vehicle lamps such as daytime running lamps (daylights), high beam lamps, fog lamps, and turn signal lamps. In addition, since two sets of two light emitting units 2 for a lamp are used, higher luminous intensity can be obtained.

It is a perspective view of the two light emission units for lamps which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is a front view showing two light emitting units for lamps. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by the light emission unit for upper lamps. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by the light emission unit for lower lamps. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by the light emission unit for upper lamps, and the light emission unit for lower lamps. It is a front view of the two light emission units for lamps which shows the 1st modification of Example 1 of the vehicle lamp concerning this invention. It is a front view of the two light emission units for lamps which shows the 2nd modification of Example 1 of the vehicle lamp concerning this invention. It is a front view of the front combination lamp which shows Example 2 of the vehicle lamp concerning this invention. Similarly, it is a perspective view which shows one light emission unit for lamps. Similarly, it is a front view showing one light emitting unit for a lamp. Similarly, it is explanatory drawing which shows the outline of the light distribution pattern obtained by one light emission unit for lamps. Similarly, it is explanatory drawing which shows the light distribution pattern obtained with one light emission unit for lamps. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by four light emission units for lamps.

Explanation of symbols

1, 1A, 1B, 1C Vehicle lamp 2, 21, 22 Light-emitting unit for lamp 3, 31, 32 LED
4, 41, 42 Reflector 5, 51, 52 Substrate 6, 61, 62 Light emitting part 71, 72, 73, 74, 75, 76, 77, 78 Reflecting surface 10 Head lamp 11 Lamp lens 12 Lamp housing 13 Lamp chamber P1, P2, P3 Light distribution pattern obtained with one light emitting unit for lamps P Light distribution pattern obtained with two light emitting units for lamps P0 Light distribution pattern obtained with four light emitting units for lamps F Front side B Rear side U Upper D Lower L Left R Right HL-HR Horizontal horizontal line VU-VD Vertical vertical line HH Horizontal axis

Claims (3)

In a vehicle lamp that uses two light emitting units for a lamp as a set,
The light emitting unit for a lamp is composed of an LED as a light source and a reflecting surface from which a predetermined light distribution pattern is obtained by reflecting light from the LED in a predetermined direction.
The two light emitting units for lamps are arranged above and below a horizontal axis, and have a high luminous intensity band at the center and a long light distribution pattern on the horizontal line on the left and right. Vehicle lamp. The LED has a high color temperature of light,
The reflection surface is composed of a condensing reflection surface that forms the high luminous intensity band and a diffuse reflection surface that forms a long light distribution pattern on the horizontal line on the left and right.
The vehicular lamp according to claim 1. The reflecting surface is vertically divided into three, and the reflecting surface at the center is a condensing reflecting surface that forms the high luminous intensity band having a substantially triangular shape or the high luminous intensity band having a substantially inverted triangular shape, The reflective surface is a diffusely reflective surface that forms a substantially triangular light distribution pattern that is long on the horizontal line to the left or right or a substantially inverted light distribution pattern that is long on the horizontal line to the left or right.
By arranging the two light emitting units for lamps above and below the horizontal axis, a substantially rhombic light distribution pattern having a high luminous intensity band of approximately rhombus in the center and long on the horizontal line on the left and right is obtained.
The vehicular lamp according to claim 1 or 2.

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