JP2005267875A - Vehicular led lamp and vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular LED lamp having quality sufficiently satisfying light distribution performance and light distribution specification required for an objective lamp and usable as an electric bulb; and to provide a vehicular lighting fixture using the LED lamp. <P>SOLUTION: The vehicular LED lamp A is provided with at least (1) a first light source part comprising a group of a plurality of shell type LEDs 4 arranged in a circular opening 13 at a lamp front position having a predetermined area, and (2) a pair of second light source parts each comprising a group of a flux type LEDs 5 formed on a side shell part 11 of the lamp back to back. This vehicular lighting fixture uses the lamp A and is used for a stop and tail lamp, a stop lamp or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lamp and a lamp using a light emitting diode (hereinafter referred to as “LED”) for a vehicle. More specifically, the present invention relates to a high-intensity LED lamp that can be used for a vehicle lamp widely including automobiles and two-wheeled vehicles, and a vehicle lamp using the lamp.

  Halogen lamps and discharge lamps that emit filaments have been used for lamps (lights) deployed in vehicles such as various automobiles and motorcycles. Recently, in addition to these conventional light sources, LEDs are used as light sources. Lamp technology has been proposed and has been partially put into practical use. The main development factor is that the LED is economically advantageous because the LED has low power consumption and does not run out of balls.

  In general, the LED is generally classified into a lead type and a chip type based on the presence / absence of a lead wire, and the lead type is further classified into a shell type, a flux type, a square type (or a flat type), etc. according to the shape. be able to. Currently, bullet-type LEDs are often used in traffic lights because of their characteristics such as light quantity and light distribution. Chip-type LEDs are inferior to bullet-type in terms of light intensity even if many of them are arranged, and flux-type LEDs are known to have characteristics between the bullet-type and chip-type in the balance between straight light and diffused light. Yes.

  Here, some prior arts related to vehicle lamps and vehicle lamps using LEDs are listed. First, in Patent Document 1, a plurality of LED elements are arranged as light sources on a substrate formed in a substantially semi-cylindrical shape. An LED lamp is disclosed that includes a light emitting portion that is electrically connected to the socket and that is detachably inserted into a socket while electrically supporting the light emitting portion.

  Patent Document 2 discloses a vehicular lamp in which a means for projecting light from an LED disposed in a housing to a reflector is devised to improve the utilization efficiency of the reflector. That is, a technique for reflecting light from an LED with a reflector to produce emitted light is known.

In Patent Document 3, a multi-point light-emitting unit composed of a large number of LED light sources is provided in the housing, and the light emitted from the multi-point light-emitting unit is reflected by a reflecting member, so that the arrangement equivalent to that of a filament bulb is provided. A vehicular lamp is disclosed that has optical characteristics.
JP 2001-126510 A. JP 2002-270009 A. Japanese Patent Application Laid-Open No. 2004-014197.

  However, when the LED is used as the light source of the vehicular lamp, there are problems such as light distribution performance and emission wavelength change due to heat generation. In particular, in terms of light distribution performance, the amount of light is insufficient, or uneven brightness occurs on the light-emitting surface, so that the light bulb has a quality that conforms to JIS light distribution standards (for example, JIS A1 / B1 and JIS A2 / B2). No substitute was available.

  Therefore, the present invention mainly provides a vehicle LED lamp that has a quality that sufficiently satisfies the light distribution performance required for a target lamp and can be used as an alternative to a light bulb, and a vehicle lamp that uses the lamp. Objective.

  First, in the present invention, at least the following (1) a first light source unit composed of a plurality of bullet-type LED groups arranged in front of a lamp having a predetermined area, and (2) a pair of back-to-back units on the lamp side body unit. There is provided a vehicle LED lamp comprising: a second light source unit configured of a formed chip-type LED group. For example, a vehicle LED lamp according to the present invention includes a bullet-type LED group that forms vertical light and a pair of flux-type LED groups that form horizontal light, and both the vertical light and the horizontal light are provided. By using it, a predetermined light distribution performance is obtained.

  For example, a first light source unit composed of a bullet-type LED group can function as a tail lamp light source and a stop lamp light source, and the second light source unit can function as a stop lamp light source. The vehicular lamp provided with the LED lamp having such a configuration can be used as a so-called stop-and-tail lamp. Further, both the first light source unit and the second light source unit can function as a stop lamp light source. The vehicular lamp including the LED lamp having such a configuration can be used as a stop lamp.

  In the present invention, the first light source unit is composed of a total of twelve 5φ bullet-type LEDs having a luminance of 8300 mcd (milli candela) or more, and the second light source unit has a total of four luminous fluxes 3.5 to 6. You may comprise from 1 lm (lumen) flux type LED. By adopting such a configuration, it is possible to obtain a bulb replacement product having a quality conforming to the JIS light distribution standard (for example, JIS A2 / B2 STOP LAMP). In other words, the LED lamp according to the present invention can be attached in place of the light bulb pre-installed in the vehicle to improve the luminance.

  In the present invention, it is desirable that the lamp case for holding the bullet-type LED group and the flux-type LED group is made of copper having good thermal conductivity. Thereby, since the heat radiation efficiency can be improved, problems such as a change in emission wavelength due to heat generation can be solved, and thereby the luminance can be kept constant.

  Next, in the present invention, the vehicle LED lamp, the front lens disposed in front of the LED lamp, and the light emitted from the second light source part of the LED lamp are reflected and guided to the front lens. There is provided a vehicular lamp including at least a reflector. The purpose of use of the vehicular lamp is not particularly limited. For example, the vehicular lamp can be used for a stop-and-tail lamp or a stop lamp as described above.

  Since the vehicle LED according to the present invention has high brightness and has a quality that sufficiently satisfies the light distribution performance required for the target lamp, it can be used as an alternative to a light bulb pre-installed in the lamp. it can.

  In addition, the vehicular lamp according to the present invention directly guides the vertical light emitted from the bullet-type LED group to the front lens arranged at the front position of the LED lamp arranged in the lamp housing, and the flux type LED. By reflecting the horizontal light emitted from the group by the reflector and guiding it to the front lens, a predetermined light distribution can be obtained using both the vertical light and the horizontal light.

  Hereinafter, preferred embodiments of a vehicle LED lamp and a vehicle lamp according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic perspective view of a vehicular LED lamp according to the present invention, FIG. 2 is a diagram showing a form of the vehicular LED lamp when viewed from the side, and FIG. 3 is an upper view of the vehicular LED lamp. FIG. 4 is a view showing the vehicle LED lamp as viewed from the side of the arrow X in FIG. 2, and FIG. 5 is a diagram showing the vehicle LED lamp. It is a figure which shows a form when it sees from the downward direction.

  First, a description will be given with reference to FIGS. In these FIGS. 1 to 5, a vehicle LED lamp (hereinafter abbreviated as “LED lamp”) indicated by the symbol A is shown in common. The LED lamp A is a light source that can be exchanged for a light bulb mounted on a lamp mounted on a vehicle including an automobile such as an ordinary car or a truck, a motorcycle, and the like. For example, the battery has a 12V specification and can be replaced with a S25 type BAY15d / BA15s bulb.

  The LED lamp A includes a body case (hereinafter referred to as “case”) 1 having a substantially cylindrical shape in consideration of thermal conductivity (heat dissipation efficiency), and a group of LEDs functioning as a light source at a predetermined position of the case 1. Are arranged so as to be exposed to the outside. The case 1 is fixed to a socket ring 2 having a stepped shape, and a lower end portion of the socket ring 2 is inserted and fixed to a base 3.

  The case 1 is formed of a material having good thermal conductivity (heat dissipation efficiency) in order to easily dissipate heat generated from the LED light source (reference numerals 4 and 5 described later) held in the case 1. Especially desirable. For example, it is preferable to form with a simple substance of copper or a combination of copper and another metal material such as aluminum, and a simple substance of copper is particularly suitable. Further, the side body portion 11 of the case 1 shown in the figure is provided with a concavo-convex portion 11a extending in the vertical direction in the circumferential direction for improving heat dissipation and further improving the strength.

  A pair of rectangular openings 12a and 12b are provided in the side body portion 11 of the case 1 which has a substantially cylindrical shape when viewed from the outside in a back-to-back arrangement relationship (particularly, refer to FIG. 2). A circular opening 13 having a predetermined diameter is formed on the upper surface of the case 1, that is, on the front surface portion (upper portion) facing the direction in which light is emitted. Here, the inner diameter of the circular opening 13 in the present embodiment is a design of φ26 mm, but is not limited thereto.

  A pair of reference pins 31a and 31b for positioning the LED lamp 1 are provided on the base 3 fixed to the socket ring 2 indicated by reference numeral 2 in FIGS. (See FIG. 2 in particular). In addition, in the LED lamp A which concerns on this invention, the form itself which provided the nozzle | cap | die 3 does not make it an essential structure, and another structure may be sufficient.

  Here, in this embodiment, as shown in FIG. 1 and FIG. 3, the round-shaped opening 13 above the case 1 is provided with a total of 12 bullet-type LEDs 4 having a predetermined diameter constituting the first light source unit. Are arranged. More specifically, a total of nine are arranged at predetermined intervals in the circumferential direction on the outermost peripheral side in the circular opening 13, and a total of three are arranged on the inner side thereof (see particularly FIG. 3).

  In particular, referring to FIG. 2 and FIG. 4, the head portion 41 that forms the dome shape of the bullet-type LED 4 is exposed from the circular opening 12 of the case 1, and the head portion 41 can be viewed from the side. I can understand that. Note that the number, the arrangement position, and the arrangement configuration of the bullet-type LEDs 4 are not limited to the illustrated embodiment, and may be appropriately determined in light of the required light distribution standard.

This bullet-type LED 4 group is arranged so as to face the front lens constituting the lamp when it is arranged in a housing (lamp chamber) of a vehicular lamp (described later). , The light (vertical light) P ₁ irradiated to the outside is simultaneously emitted from each bullet-type LED 4.

  Here, the bullet-type LED 4 is an LED light source that literally has a bullet-like appearance. The color of the bullet-type LED 3 is not particularly limited and can be selected according to the purpose. For example, when the LED lamp A is employed as a stop-and-tail lamp or a stop lamp disposed at the rear of the vehicle, red may be employed. In the bullet-type LED 3 of this embodiment, a red LED having a diameter of 5 mm, 8300 mcd, and a directivity angle of 23 ° is employed.

  Next, in the rectangular opening 12a provided so as to open in a rectangular shape in the side body portion 11 of the case 1, a total of four flux-type LEDs 5 constituting the second light source unit, two by two stages. (See FIG. 1). Similarly, a total of four flux-type LEDs 5 are arranged in a two-by-two arrangement in the other rectangular opening 12b formed back to back with respect to the rectangular opening 12a. (See especially FIGS. 2 and 4).

  This flux-type LED 5 is a kind of LED having a form in which a light source is arranged in the center of a substantially flat base resin portion. In particular, a lead wire having a 4-pin type (a type in which four lead wires are led out) may be called a common name piranha type. In the present embodiment, the piranha type is used for all the eight (4 × 2) flux type LEDs 5 to be adopted, and the red LED is within the range of the luminous flux of 3.5 to 6.1 lm. Also, those having a directivity angle of 70 ° to 100 ° are employed. In addition, even if it is a flux type LED which does not enter into the category of a piranha type LED, if it exhibits functions such as light distribution performance equivalent to the present invention, it can be adopted.

In the LED lamp A according to the present invention, the optical axis of the light P ₂ emitted respectively from the flux-type LED5 is a positional relationship perpendicular to the optical axis of the light P ₁ emitted from each of the bullet type LED 4 (FIG. 2 reference).

For example, when the light P ₁ emitted from shell-type LED4 and vertical light, the light P ₂ emitted from the flux-type LED5 is a horizontal beam. The light P ₂ emitted from the flux-type LED5, as described later, and once reflected by the reflector, towards the front lens side.

  Here, FIG. 6 is a cross-sectional view of the LED lamp A according to the present invention taken along the line II in FIG. As shown in FIG. 6, the lower end portion 14 of the metal case 1 is attached to the inner wall surface 21 of the socket ring 2 having a multi-stage side view through a metal adhesive (not shown). The cylindrical portion 22 at the lowest end of the socket ring 2 is inserted into the inner cylinder portion 32 of the base 3 and fixed to the inner wall surface 33 of the base 3.

  Further, as shown in FIG. 6, the bullet-type LED 4 group is in a state of being integrated with a disk-shaped print base 42. The print base 42 is seated on the bottom 13a of the circular opening 13 above the case 1 and is fixed to the case 1 via heat-dissipating silicon (not shown).

  One group of flux-type LEDs 5 is integrated with the print bases 51 and 51 in units of 4 (2 × 2 stages), and the print bases 51 and 51 are connected to the case through the heat dissipation silicon 6. 1 is fixed to the shaft portion 15 (see FIG. 6). As a result, the pair of flux-type LEDs 5 are arranged so as to be back to back with each other.

  In addition, the code | symbol 7 (refer socket 2 part part) shown by FIG.1, FIG.2, etc. and the code | symbol 8a, 8b (refer bottom part of a nozzle | cap | die 3) shown by FIG. The reference numerals R and R shown in FIG. 6 indicate resistances.

  Here, the code | symbol 9 shown by FIG. 6, FIG. 7 has shown the constant current diode (CRD). This constant current diode 9 is provided for the purpose of responding to a change in the amount of voltage supplied from a power source such as a battery and a role as a resistor for limiting and adjusting the current value to the bullet-type LED 4 group.

  FIG. 7 is a simplified diagram for simply explaining the wiring configuration of the LED lamp A. FIG. The LED lamp A described above is a lamp that can turn on the bullet-type LED 4 group and the pair of flux-type LED 5 groups on different paths. Specifically, the LED lamp A can light only the bullet-type LED 4 group at a certain stage, and can simultaneously light the bullet-type LED 4 group and a pair of flux-type LED 5 groups at a certain stage (hereinafter, referred to as “the bullet-type LED 4 group”). Called "double type").

  This double type LED lamp A can be used as a light source of a stop-and-tail lamp of an automobile, for example. That is, the bullet-type LED 4 group can be used as a light source for the tail lamp, and the pair of flux-type LED 5 groups can be used as a light source for a stop lamp that is lit when the brake is used.

  The constant current diode 9 is a double type, and when the bullet-type LED 4 group functions as a light source for the tail lamp, the current amount is suppressed and the brightness is reduced to a necessary level. When the LED4 group and the pair of flux-type LED5 groups are lit simultaneously (when using the brake), the current amount is released and the pair of flux-type LED5 is raised in the state where the brightness of the bullet-type LED4 group is increased. It fulfills the function of being able to light up simultaneously with the group.

FIG. 7 is a partial view for briefly explaining the wiring configuration of the LED lamp A according to the present invention. Reference numeral L ₁ shown in FIG. 7 is a lead wire for supplying power to the bullet-type LED 4 group that functions as a main light such as a tail lamp. Reference numeral L ₂ is a lead wire for supplying power to the pair of flux-type LED5 group that functions as a secondary lamp such as a stop lamp. Symbol E is a ground wire. Further, L symbol L ₁₁ is a positive lead wire for the main light, L ₁₂ is a negative lead wire for the main light, ₂₁ is a positive lead wire for the sub light, and L ₂₂ is a negative lead wire for the sub light. Each line is shown.

  Next, FIG. 8 is a diagram illustrating an example of a logic circuit related to the double type LED lamp A. In FIG. 8, symbol D indicates a rectifier, R indicates a resistor, and T indicates a terminal.

  The LED lamp according to the present invention may be configured so that the bullet-type LED 4 group can be turned on and the pair of flux-type LED 5 groups can be turned on / off through the same route. Specifically, at a certain stage, the bullet-type LED 4 group and the pair of flux-type LED 5 groups may be turned on simultaneously, and at a certain stage, the bullet-type LED 4 group and the pair of chip-type LED 5 groups may be turned off simultaneously. (This is called “single type”). The LED lamp in this case can be used as a stop lamp or a turn signal lamp, for example.

FIG. 9 is a diagram illustrating an example of a logic circuit related to the single type LED lamp A. As illustrated in FIG. In this embodiment, it is configured to be powered by the pair of chip-type LED5 group is bullet-shaped LED4 group and Fukuakari the main light from the common positive lead L _3. Other reference numerals are the same as those in FIG.

  FIG. 10 is a diagram schematically showing the configuration of an embodiment of a vehicular lamp according to the present invention. A vehicular lamp B shown in FIG. 10 includes a reflector 101 arranged so as to surround the LED lamp, a front lens 102 attached so as to cover a front opening of the reflector 101, a lamp chamber, And an LED lamp (single or double type) A, which is a light source disposed in 103.

  The bullet-type LED lamps 4 constituting the LED lamp A are arranged so as to face the front lens 102, and the pair of left and right flux-type LEDs 5 are arranged so as to substantially face the reflector 101.

Light _{P 1} emitted from the bullet-type LED lamp 4 groups, it directly toward the front lens 102 of the front light _{P 2} emitted from each of the flux-type LED5 group, is once reflected by the reflector 101, The light distribution configuration toward the front lens 102 is adopted.

For example, the vehicular lamp B can function as a stop-and-tail lamp of a vehicle such as an automobile or a two-wheeled vehicle by adopting the double type LED lamp A as a light source in the lamp B. That is, the light P ₁ emitted from the shell-type LED4 group to function as a tail lamp, a pair of flux-type LED5 group can function as a stop lamp which lights during use brake.

  Further, the vehicle lamp B can function as a stop lamp, a turn signal lamp, or the like of a vehicle such as an automobile or a two-wheeled vehicle if the single type LED lamp A is used as a light source.

  The inventor of the present application actually performed a performance test by placing the LED lamp according to the present invention on a Koito Manufacturing lamp (220-213662L JAPAN) for a tail lamp for a truck.

  Specifically, the design voltage is 13.5 V, a total of 12 bullet-shaped red LEDs 4 having a luminance of 8300 mcd and a directivity angle of 23 ° and a φ5 mm are arranged, and a flux-type red LED 5 having a luminous flux of 3.5 lm and a directivity angle of 70 ° is provided. A total of 4 pieces (two stages × 2 pieces) were arranged on each side, and the light distribution performance was confirmed.

  As a result, the LED lamp according to the present invention has a brightness about 2.5 times that of the comparative example when the LED lamp product with the highest luminance among the ready-made products is used as a comparative example, and has high luminance performance. (Maximum 62 cd at the central luminous intensity) was confirmed.

  In addition, the LED lamp according to the present invention is a product conforming to safety standards (vehicle inspection compatible product), and has also been confirmed to satisfy the light distribution standards of JIS A2 / B2 STOP LAMP and JIS A / B TAIL LAMP. . In addition, about the flux type | mold red LED5, it turned out that a thing with a directivity angle of 70-100 degrees is employable in the range of the light beam 3.5-6.1lm.

  The vehicular LED lamp according to the present invention has high brightness and can be used as a light bulb substitute having a quality conforming to a JIS light distribution standard (for example, JIS A2 / B2 STOP LAMP and JIS A / B TAIL LAMP). Moreover, the vehicular lamp using the LED lamp can be used as, for example, a stop-and-tail lamp, a stop lamp, a turn signal lamp, or the like.

It is a general | schematic perspective view of the LED lamp (A) for vehicles which concerns on this invention. It is a figure which shows a form when the LED lamp for vehicles (A) is seen from the side. It is an external appearance top view which shows a form when the LED lamp for vehicles (A) is seen from upper direction. It is a figure which shows a form when the LED lamp for vehicles (A) is seen from the side of arrow X of FIG. It is a figure which shows a form when the LED lamp for vehicles (A) is seen from the downward direction. It is the II arrow directional cross-sectional view in FIG. 4 of the LED lamp for vehicles (A). It is a partial view for concisely explaining the wiring composition of LED lamp A concerning the present invention. It is a figure which shows an example of the logic circuit regarding the LED lamp (A) which is a double type. It is a figure which shows an example of the logic circuit regarding the LED lamp which is a single type. It is a figure which shows simply the structure of one Embodiment of the vehicle lamp (B) which concerns on this invention.

Explanation of symbols

A LED lamp (double type)
B Vehicle Lamp 1 Body Case (Case)
2 Socket ring 3 Base 4 Cannonball type LED (group)
5 Flux-type LEDs (group)
11 Side trunks 12a, 12b of case 1 Rectangular opening 13 Circular opening 101 Reflector 102 Front lens 103 Light chamber P ₁ Light from bullet type LED P ₂ Light from flux type LED

Claims (6)

A vehicle LED lamp comprising at least the following (1) and (2).
(1) A first light source unit including a plurality of bullet-type LED groups arranged in front of a lamp having a predetermined area.
(2) A second light source unit composed of a flux-type LED group formed in a pair of back-to-back portions on the lamp-side body. The vehicle LED lamp according to claim 1, wherein the first light source unit functions as a tail lamp light source and a stop lamp light source, and the second light source unit functions as a stop lamp light source. The vehicle LED lamp according to claim 1, wherein both the first light source and the second light source function as a tail lamp light source. The first light source unit is composed of 12 5φ bullet-type LEDs having a luminance of 8300 mcd (milli candela) or more in total, and the second light source unit has a total of four light fluxes of 3.5 to 6.1 lm (lumens), respectively. 4. The vehicular LED lamp according to claim 1, wherein the vehicular LED lamp is composed of a flux type LED. The vehicle LED lamp according to claim 1, wherein a lamp case for holding the bullet-type LED group and the flux-type LED group is formed of copper. Reflecting the light emitted from the LED lamp for vehicles as described in any one of Claim 1 to 5, the front lens arrange | positioned in front of this LED lamp, and the 2nd light source part of this LED lamp A vehicle lamp comprising at least a reflector that leads to the front lens.