JP2005081902A - Light source for lighting fixture and lighting fixture equipped with it - Google Patents

Light source for lighting fixture and lighting fixture equipped with it Download PDF

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Publication number
JP2005081902A
JP2005081902A JP2003314004A JP2003314004A JP2005081902A JP 2005081902 A JP2005081902 A JP 2005081902A JP 2003314004 A JP2003314004 A JP 2003314004A JP 2003314004 A JP2003314004 A JP 2003314004A JP 2005081902 A JP2005081902 A JP 2005081902A
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light emitting
emitting led
light source
light
infrared
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JP2003314004A
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JP4503960B2 (en
Inventor
Takuya Kushimoto
Yasushi Tanida
琢也 久志本
安 谷田
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Stanley Electric Co Ltd
スタンレー電気株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture and a light source for it capable of simplifying the constitution otherwise complicated as seen in a light source using a halogen lamp, which serves as both a night vision and a headlight and wherein a proprietary reflection surface and a lens for each of visible rays and infrared rays are required. <P>SOLUTION: The light source 1 for the lighting fixture using LEDs as the light emission source is structured so that an appropriate number of white LEDs 2 and an appropriate number of infrared LEDs 3 are mounted in one package, whereby the visible rays and infrared rays are emitted from substantially one position, which enables using a common reflection surface and a common lens for both sorts of rays, and the constitution can be simplified to lead to solving the conventional problems. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light source used in, for example, a headlight that is a vehicle lamp, that is, a light source for a lamp, and a lamp including the light source. This relates to a configuration when an LED is employed instead of the arc.

  As a conventional vehicular lamp of this type, there is a configuration in which a halogen light bulb using a filament as a light source is employed as a light source, and a visible light blocking filter is formed in an appropriate range in front of the glass bulb. In this way, the light emitted from the filament is transmitted through the portion of the glass bulb where the visible light blocking filter is not provided (visible + infrared), and the visible light blocking filter is provided. And a portion of infrared light that passes through the portion.

  Then, a visible light reflecting surface is provided corresponding to the range where (visible + infrared) light is emitted, and an infrared light reflecting surface is provided corresponding to the range where the infrared light is emitted. In addition, a visible light lens is provided in a range where the reflected light from the visible light reflecting surface is projected, and an infrared light lens is provided in a range where the reflected light from the infrared light reflecting surface is projected, The shape of the light distribution characteristic for each light is formed.

By doing in this way, the light source for the headlamp for confirming the course by visible light and visual observation by one halogen light bulb, and the light source for the night vision for confirming the course by infrared rays and the night vision device It can be obtained at the same time, and the lamp can be used for both headlight and night vision.
JP 2003-59461 A

  However, in the lamps that use the above-mentioned conventional halogen bulbs as the light source, the lamps are certainly used for both headlights and night vision, and the number of lamps installed on the vehicle can be reduced and the purpose of improving the aesthetics can be achieved. However, on the other hand, it is necessary to provide a headlight reflecting surface and lens, and a night vision reflecting surface and lens in one lamp, resulting in a complicated configuration. Yes.

  At this time, the reflection surface and lens on the night vision side must be provided so as not to cause positional and functional interference with the reflection surface and lens on the headlamp side, and this is also a technically difficult problem. Since the visible light blocking filter is provided directly on the glass bulb, even if it is partially, the high temperature of the visible light blocking filter is unavoidable, and peeling from the glass bulb is likely to occur. There is a problem. In addition, since the amount of infrared rays obtained from one halogen bulb is limited, there is a problem that the amount of infrared rays required by the night vision side is not necessarily satisfied.

  In addition, when a filament is used as a light source, the filament includes a wide range of wavelengths in the emitted light. Therefore, when a light source for night vision is used, the necessary infrared portion is visible from all the light. It is necessary to extract with a light blocking filter or the like. In addition, the infrared rays contained in the visible light are also visually ineffective, so that the amount of available light obtained with respect to the input power is small, the conversion efficiency is low, the power consumption is excessive, the heat is excessive, etc. There is a problem.

  As a specific means for solving the above-described conventional problems, the present invention is a light source for a lamp that uses an LED as a light source, and an appropriate number of white light emitting LEDs and an appropriate number of infrared light emitting LEDs are 1. By providing a light source for a lamp characterized by being mounted in one package, visible light and infrared light can be emitted from the same place, reflecting surfaces for headlights and night vision, It is possible to simplify the configuration by allowing the lens to be shared, and to improve the luminous efficiency of visible light and infrared with respect to the input power, thereby solving the problem.

  The light emitting source is a white light emitting LED for headlights housed in one package and an infrared light emitting LED for night vision, so that both white light and infrared light are from substantially the same position. As a result, a visible light blocking filter is not required, and a reflecting surface and a lens can be shared, reducing the number of parts and simplifying the configuration, thereby reducing the cost. .

  In addition, as described above, by using the white light emitting LED and the infrared light emitting LED as the light source, the light emitted from the infrared light emitting LED does not include visible light, Infrared rays are also not included, and the light emission efficiency with respect to the applied power amount is improved, and overall power consumption, heat generation, and the like can be reduced. In addition, since the number of each of the white light emitting LED and the infrared light emitting LED can be freely selected, an appropriate light amount can be set for each.

  Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 and 2 show a first embodiment of a lamp light source 1 according to the present invention. The lamp light source 1 in the first embodiment has a visual field of view as a light source such as a headlight. One package 9 includes a white light emitting LED 2 that is used as a light source of a lamp for obtaining, and an infrared light emitting LED 3 that is used as a light source for obtaining a field of view using an infrared night-vision device or the like. .

  At this time, in the present invention, the size of the white light emitting LED 2 is set so that the length of one side is at least twice the length of one side of the infrared light emitting LED 3. This is because the visibility on the side of the headlight illuminated with white light depends on the human visual sensitivity, the brighter the field of view expands, and the relatively brighter the difference in brightness, the brighter, and This is because better results are obtained when the area is set larger in order to prevent the occurrence of light unevenness.

  As described above, the white light emitting LED 2 and the infrared light emitting LED 3 provided with the dimensional difference are, for example, cavities 4a and 4b provided in the core 4 formed of a member having excellent thermal conductivity such as copper and aluminum. It is mounted inside, improving the heat dissipation performance, enabling driving with higher power, and enabling brighter, wider viewing range headlights and night vision.

  In addition, as described above, in the present invention, the white light emitting LED 2 and the infrared light emitting LED 3 are formed with different dimensions, so that the white light emitting LED 2 corresponds to the difference in the dimensions. The cavity 4a for the infrared light emitting LED 3 and the cavity 4b for the infrared light emitting LED 3 improve the space efficiency when the LEDs 2 and 3 are arranged in the core 4.

  In the present invention, the lamp light source 1 is provided with a common terminal 5a, a white lighting terminal 5b, and an infrared lighting terminal 5c, and the LEDs 2, 3 are wired by a gold wire 6. As necessary, only the white light emitting LED 2 is turned on, only the infrared light emitting LED 3 is turned on, and both the white light emitting LED 2 and the infrared light emitting LED 3 are turned on, and both the white light emitting LED 2 and the infrared light emitting LED 3 are turned on. It is possible to freely turn off and select from four lighting modes.

  As described above, each of the LEDs 2 and 3 mounted on the core 4 and wired with the gold wire 6 is covered with a transparent silicone resin 7 so as to be moisture-proof against the outside air. Further, if necessary, a transparent lens 8 is provided to adjust the optical characteristics, and the light source 1 for a lamp is completed.

  Here, if the configuration of the white light emitting LED 2 is described, the white light emitting LED 2 is excited by the blue light emitted from the LED 2a and the blue light from the LED 2a as shown in FIG. It is comprised from the fluorescent substance 2b to perform, and white light is obtained as a mixed color of the blue light from LED2a, and the yellow light from fluorescent substance 2b.

  Or although illustration is abbreviate | omitted, it is excited by the ultraviolet LED which light-emits near ultraviolet light-ultraviolet light, and the light from the said ultraviolet LED, and each emits R (red), G (green), and B (blue) three primary colors. It is comprised from the three-wavelength fluorescent substance which mixed the fluorescent substance to perform, and white light may be obtained with the mixed color of the luminescent color from the said three-wavelength fluorescent substance. On the other hand, since the infrared light emitting LED 3 emits infrared light by itself, a phosphor or the like is not added as described above, and the shape of the infrared light emitting LED 3 is a so-called LED chip. It becomes a shape.

  FIG. 4 shows a state of arrangement of the white light emitting LED 2 and the infrared light emitting LED 3 in the first embodiment configured as described above. In this embodiment, the white light emitting LED 2 and the infrared light emitting LED 3 are arranged. The LEDs 3 are alternately arranged with the center aligned with a single straight line L. The distance between the LEDs 2 and 3 is set to 1/3 or less (about 100 μm) of the light emission size.

  By arranging in this way, the white light emitting LED 2 that emits white light, that is, visible light, is arranged with a space narrowed with respect to the infrared light emitting LED 3 that emits infrared light. Since the shape of the light emitting LED 2 itself is also set larger than that of the infrared light emitting LED 3, it becomes easy to obtain a bright light distribution characteristic with less light unevenness as a headlight.

  Next, the operation and effect of the lamp light source 1 of the present invention configured as described above will be described. First of all, the white light emitting LED 2 and the infrared light emitting LED 3 are combined to form the light source of the light source 1 for the lamp, so that the light from the white light emitting LED 2 does not contain infrared light. The light from the infrared light emitting LED 3 does not include visible light.

  This means that the light from the infrared light emitting LED 3 does not affect the light distribution characteristics of the headlight, and similarly, the light from the white light emitting LED 2 does not affect the light distribution characteristics of the night vision. Therefore, each light distribution characteristic can be optimized.

  For example, the light from the white light emitting LED 2 does not include infrared light, which means that the power applied to the white light emitting LED 2 is not white including invisible light such as infrared light and ultraviolet light. It is not converted into light, and it is clear from this that the conversion efficiency with respect to the applied power is high. This also applies to the infrared light emitting LED 3.

  More specifically, the lamp light source 1 is composed of a white light emitting LED 2 and an infrared light emitting LED 3 that each emit light of a dedicated wavelength, so that individual lighting and extinguishing can be freely performed as necessary. It is possible to reduce the occurrence of interference. In addition, by separating the light source according to the wavelength in this way, for example, it is possible to give priority to the light amount and shape on the visible light side sensitive to luminance unevenness and the like, and it is possible to improve the illumination quality. .

  5 to 9 show examples of the arrangement of the white light emitting LED 2 and the infrared light emitting LED 3 in the light source 1 for a lamp according to the present invention. First, what is shown as a second embodiment in FIG. In the embodiment of FIG. 4 (see FIG. 4), the line L and the centers of the LEDs 2 and 3 are arranged to coincide with each other, whereas the sides of the LEDs 2 and 3 are arranged in a straight line. It is. By aligning one side in this way, for example, when light distribution characteristics of headlights and night vision light distribution characteristics are desired not to irradiate on the horizon, form light distribution characteristics that meet the demands. Becomes easy.

  The arrangement shown in FIGS. 6 and 7 as the third embodiment and the fourth embodiment is such that one side of the infrared light emitting LED 3 is aligned with respect to two parallel sides of the white light emitting LED 2, and red as described above. Since the outer light emitting LED 3 is formed to have a side having a length that is ½ or less of the side of the white light emitting LED 2, two or more of the white light emitting LEDs 2 are sandwiched.

  FIG. 8 shows a fifth embodiment in which the white light emitting LED 2 and the infrared light emitting LED 3 are arranged in a straight line and in parallel with each other, and the visible light and the infrared light are horizontally aligned. A wide, unbroken light distribution characteristic is an example of an arrangement that is suitable when required. Further, what is shown as the sixth embodiment in FIG. 9 is an example in which the whole is arranged in a square, and is an example of an arrangement that is suitable when a spot-like light distribution characteristic is required.

  FIG. 10 shows an example of a lamp 10 that employs the lamp light source 1 according to the present invention as a light source. In this example, the lamp 10 is a parabolic reflecting surface 11 such as a rotating paraboloid focusing on the light source. It is shown in an example when is adopted. A shielding plate 12 that shields light reaching the lower half of the reflecting surface 11 is provided in the vicinity of the lamp light source 1, and an appropriate amount of light from the reflecting surface 11 is provided in front of the reflecting surface 11. A lens 13 provided with a lens cut 13a that imparts diffusion and forms a light distribution characteristic is provided.

  With this configuration, the white light-emitting LED 2 and the infrared light-emitting LED 3 are considered to be in substantially the same position with respect to the reflecting surface 11, so that the light distribution characteristic by the light from the white light-emitting LED 2 is also the infrared light emission. The light distribution characteristic by the LED 3 is also the light distribution characteristic having substantially the same shape.

  In the present invention, a white light emitting LED and an infrared light emitting LED, that is, a light source for a lamp is formed by combining two colors of visible light and invisible light, but this combination of two colors of visible light and invisible light. One color or one color of visible light and two colors of invisible light can be freely changed.

It is a perspective view which shows 1st embodiment of the light source for lamps which concerns on this invention. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which shows the principal part of the same 1st embodiment. It is explanatory drawing which shows the state of arrangement | positioning with white light emitting LED and infrared light emitting LED in 1st embodiment. It is explanatory drawing which shows the state of arrangement | positioning with white light emitting LED and infrared light emitting LED in 2nd embodiment. It is explanatory drawing which shows the state of arrangement | positioning with white light emitting LED and infrared light emitting LED in 3rd embodiment. It is explanatory drawing which shows the state of arrangement | positioning with white light emitting LED and infrared light emitting LED in 4th embodiment. It is explanatory drawing which shows the state of arrangement | positioning of white light emitting LED and infrared light emitting LED in 5th embodiment. It is explanatory drawing which shows the state of arrangement | positioning of white light emitting LED and infrared light emitting LED in 6th embodiment. It is sectional drawing which shows embodiment of the lamp which comprises the light source for lamps which concerns on this invention.

Explanation of symbols

1 ... Light source for lamps 2 ... White LED
2a ... Blue LED
2b ... phosphor 3 ... infrared light emitting LED
DESCRIPTION OF SYMBOLS 4 ... Core 4a, 4b ... Cavity 5a ... Common terminal 5b ... White terminal 5c ... Infrared terminal 6 ... Gold wire 7 ... Silicone resin 8 ... Lens 9 ... Package 10 ... Lamp 11 ... Reflecting surface 12 ... Shielding plate 13 ... Lens 13a ... Lens cut

Claims (7)

  1.   A light source for a lamp having an LED as a light source, wherein an appropriate number of white light emitting LEDs and an appropriate number of infrared light emitting LEDs are mounted in one package.
  2.   The light source for a lamp according to claim 1, wherein the white light emitting LED or the infrared light emitting LED disposed in the package is disposed at an interval of 1/3 or less of the light emission size.
  3.   3. The light source for a lamp according to claim 1, wherein the white light emitting LED has a side length that is at least twice that of the infrared light emitting LED, or has a light emitting area that is four times or more.
  4.   The white light emitting LED and the infrared light emitting LED are arranged so that the centers thereof are all on the same line, or arranged so that the ridge lines of the LEDs are in a straight line. The light source for lamps according to claim 3.
  5.   The wiring of the group of the white light emitting LED and the group of the infrared light emitting LED is formed so that each group can be driven independently. The light source for lamps according to claim 4.
  6.   6. The white light emitting LED group and the infrared light emitting LED group are mounted in cavities formed in different shapes for the respective groups. A light source for a lamp according to any one of the above.
  7.   A lamp comprising the light source for a lamp according to any one of claims 1 to 6.
JP2003314004A 2003-09-05 2003-09-05 Light source for vehicle lamp and vehicle lamp provided with light source for vehicle lamp Active JP4503960B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347381A (en) * 2005-06-16 2006-12-28 Fuji Heavy Ind Ltd Infrared ray projector
JP2007329068A (en) * 2006-06-09 2007-12-20 Stanley Electric Co Ltd Vehicular lighting fixture
DE102007015233A1 (en) * 2007-03-29 2008-10-02 Osram Gesellschaft mit beschränkter Haftung LED lamp for e.g. motor vehicle light, has LED emitting visible light, and radiation-emitting semiconductor component emitting electromagnetic radiation with maximum intensity outside visible spectral region
US8465171B2 (en) 2008-03-13 2013-06-18 Sharp Kabushiki Kaisha Headlamp and vehicle infrared night vision apparatus employing the headlamp as light source
JP2013161552A (en) * 2012-02-02 2013-08-19 Sharp Corp Light projection device, and laser irradiation device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0746376A (en) * 1993-05-21 1995-02-14 Nikon Corp Image reader
JPH10254386A (en) * 1997-03-14 1998-09-25 Sony Corp Color picture display device
JP2002344031A (en) * 2001-03-14 2002-11-29 Matsushita Electric Ind Co Ltd Illuminating unit
JP2003031007A (en) * 2001-07-16 2003-01-31 Stanley Electric Co Ltd Lighting tool
JP2003045210A (en) * 2001-06-20 2003-02-14 Daimlerchrysler Ag Vehicle head lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0746376A (en) * 1993-05-21 1995-02-14 Nikon Corp Image reader
JPH10254386A (en) * 1997-03-14 1998-09-25 Sony Corp Color picture display device
JP2002344031A (en) * 2001-03-14 2002-11-29 Matsushita Electric Ind Co Ltd Illuminating unit
JP2003045210A (en) * 2001-06-20 2003-02-14 Daimlerchrysler Ag Vehicle head lamp
JP2003031007A (en) * 2001-07-16 2003-01-31 Stanley Electric Co Ltd Lighting tool

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347381A (en) * 2005-06-16 2006-12-28 Fuji Heavy Ind Ltd Infrared ray projector
JP4597788B2 (en) * 2005-06-16 2010-12-15 富士重工業株式会社 Infrared projector
JP2007329068A (en) * 2006-06-09 2007-12-20 Stanley Electric Co Ltd Vehicular lighting fixture
JP4729441B2 (en) * 2006-06-09 2011-07-20 スタンレー電気株式会社 Vehicle lighting
DE102007015233A1 (en) * 2007-03-29 2008-10-02 Osram Gesellschaft mit beschränkter Haftung LED lamp for e.g. motor vehicle light, has LED emitting visible light, and radiation-emitting semiconductor component emitting electromagnetic radiation with maximum intensity outside visible spectral region
US8292458B2 (en) 2007-03-29 2012-10-23 Osram Ag Light emitting diode lamp comprising one LED consuming a first electrical power and one radiation-emitting semiconductor component consuming an electrical dissipation power
US8465171B2 (en) 2008-03-13 2013-06-18 Sharp Kabushiki Kaisha Headlamp and vehicle infrared night vision apparatus employing the headlamp as light source
JP2013161552A (en) * 2012-02-02 2013-08-19 Sharp Corp Light projection device, and laser irradiation device

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