JP2010212214A - Lamp unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp unit for vehicle in which light distribution accuracy is made excellent by controlling point light of central portion, outgoing efficiency is improved, and an irradiation area is increased. <P>SOLUTION: The lamp unit for vehicle 10 includes a first incident part 33 into which a part of emission light from an LED light source 28 is made to enter at a position where a translucent member 12 is opposed to the LED light source 28 and a second incident part 34 which is provided at the surrounding of the first incident part 33 and into which a part of emission light from the LED light source 28 is made to enter. Furthermore, a first reflection part 35 is provided which is installed on the front side on optical axis of the LED light source 28 opposed to the first incident part 33 and internally reflects the incident light in the direction separating from the optical axis. Furthermore, the lamp unit includes a first outgoing part 37 which is installed at the surrounding of the first reflection part 35 and emits the incident light entered from the second incident part 34 to the front, and a second outgoing part 38 which is installed at the surrounding of the first outgoing part 37 and emits the reflection light reflected internally by the first reflection part 35 to the front. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp unit including an LED light source disposed toward the front of the lamp and a translucent member provided near the front of the LED light source.

  As an example of a conventional vehicular lamp unit, a vehicular lamp unit has been proposed in which side illumination is performed from the periphery of the central portion without illuminating the central portion (see, for example, Patent Document 1).

  In this vehicular lamp unit, a light guide provided near the front of the LED light source is arranged, and incident light from the LED light source is totally reflected in the central portion of the light guide to convert it into parallel light. A first reflecting surface is formed. The parallel light from the first reflecting surface is guided along the axial direction, and is totally reflected in front of the lamp by the second reflecting surface.

JP 2006-66132 A

However, in the conventional vehicular lamp unit disclosed in Patent Document 1, since steps are provided on both surfaces of the lens, it is necessary to have a light distribution accuracy that makes the irradiation light uniform.
In addition, since the total light from the LED light source is totally reflected, a loss occurs in the reflected light, and the irradiation light cannot be made uniform, and it is difficult to further increase the irradiation area.

  The present invention has been made to solve the above-described problem, and can improve the light emission accuracy while suppressing the flashing of the central part, improve the emission efficiency, and increase the irradiation area. The object is to provide a vehicular lamp unit.

  The object of the present invention is to provide an LED light source disposed toward the front of the lamp and a front vicinity of the LED light source so that the emitted light from the LED light source is reflected from the inner surface and then emitted to the front of the lamp. A vehicle lamp unit comprising: a first incident portion that causes a part of light emitted from the LED light source to be incident on a position facing the LED light source; A second incident portion that is provided around the first incident portion and that allows a part of light emitted from the LED light source to be incident; and a front side on the optical axis of the LED light source that faces the first incident portion. A first reflecting portion that is provided on the inner surface to reflect incident light in a direction away from the optical axis; and a first reflecting portion that is provided around the first reflecting portion and that emits incident light incident from the second incident portion forward. An emission portion, and provided around the first emission portion; It is achieved by a vehicle lamp unit, characterized in that includes a second light-emitting section for emitting a reflected light is internally reflected by the reflecting portion to the front, the.

According to the vehicular lamp unit configured as described above, the translucent member causes a part of the light emitted from the LED light source to enter the position where the first incident portion faces the LED light source. In addition, the second incident part is provided around the first incident part, and allows a part of the light emitted from the LED light source to enter.
In addition, the first reflecting part is provided on the front side on the optical axis of the LED light source facing the first incident part, and reflects incident light in the direction away from the optical axis. In addition, the first emitting part is provided around the first reflecting part, and emits incident light incident from the second incident part forward. In addition, the second emission part is provided around the first emission part, and the reflected light that is internally reflected by the first reflection part is emitted forward.
As a result, it is possible to improve the light emission accuracy while suppressing the flashing of the central portion, to improve the emission efficiency, and to increase the irradiation area.

  In the vehicular lamp unit configured as described above, the translucent member is provided in the vicinity of the second incident portion, and the reflected light that is internally reflected by the first reflecting portion is directed toward the second emitting portion. It is desirable to include a second reflecting portion that reflects the inner surface.

  According to the vehicular lamp unit having such a configuration, it is possible to emit a high amount of emitted light from the center of the light source from the periphery of the first emitting unit, and to effectively use the emitted light.

  In the vehicular lamp unit configured as described above, it is preferable that the translucent member includes a columnar portion that guides incident light incident from the first incident portion to the first reflecting portion.

  According to the vehicular lamp unit having such a configuration, it is possible to actively guide the high-intensity emitted light from the central portion of the light source and to efficiently totally reflect the light.

  In the vehicular lamp unit configured as described above, it is preferable that the first emission unit includes a Fresnel lens or a step.

  According to the vehicular lamp unit having such a configuration, the irradiation area can be ensured by performing diffusion in the lateral direction.

  In the vehicular lamp unit having the above-described configuration, it is desirable that the second emission part also serves as at least a part of a second emission part of another adjacent lamp unit.

  According to the vehicular lamp unit having such a configuration, it is possible to ensure the brightness of the outer peripheral portion of another adjacent lamp unit.

  According to the vehicular lamp unit according to the present invention, it is possible to improve the light distribution accuracy while suppressing the flashing of the central portion, to improve the emission efficiency, and to increase the irradiation area.

It is a front view of the lamp unit for vehicles of one embodiment concerning the present invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is explanatory drawing which shows the optical characteristic of FIG. It is explanatory drawing which shows the modification of FIG.

  Hereinafter, an embodiment of a vehicle lamp unit according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, a vehicular lamp unit 10 according to an embodiment of the present invention includes a resin lamp body 11 that is fixed to a vehicle body in an open shape on the vehicle rear side, and a plurality of first lamp units 11. A rear combination lamp unit comprising: a transparent member 12 having colorless and transparent and translucent member 12 having first to sixth translucent portions 13 to 18 and attached to an opening 19 of the lamp body 11.

  In addition, the circuit board 20 attached to the rear side of the lamp body 11, the lamp chamber 21 surrounded by the lamp body 11, the translucent member 12, and the circuit board 20, the first to sixth translucent parts 13-18. And a plurality of LED light sources 28 that form first to sixth lamp unit portions 22 to 27 in combination. In addition, since each lamp unit part 22-27 has the same structure, the detailed description of the 4th and 5th lamp unit parts 25 and 26 is abbreviate | omitted in the following description.

  As shown in FIG. 1, the vehicular lamp unit 10 has first, second, third lamp unit portions 22, 23, 24 arranged in the vertical direction on the vehicle center side (left side in the figure), for example. Further, the fourth, fifth lamp unit sections 25, 26 are arranged in the vertical direction on the vehicle outer side (right side in the figure) of the first, second, third lamp unit sections 22, 23, 24, and the sixth lamp unit section is disposed outside thereof. 27 is formed integrally.

  As shown in FIGS. 2 and 3, the LED light source 28 has the lead portions 29 and 30 electrically connected to a printed wiring (not shown) provided on the circuit board 20 by soldering or the like.

  Hereinafter, each translucent part 13-18 is demonstrated. In addition, since each translucent part 13-18 has the same structure, the 1st translucent part 13 is mentioned as an example and demonstrated here.

The first light transmitting part 13 includes a light transmitting part main body 31 and a columnar part 32 protruding from the front surface of the light transmitting part main body 31 toward the LED light source 28.
The first light transmitting part 13 includes a first incident part 33, a second incident part 34, a first reflecting part 35, a second reflecting part 36, a first emitting part 37, and a second emitting part 38. And.

The columnar portion 32 guides incident light incident from the first incident portion 33 to the first reflecting portion 35. The first incident portion 33 is the upper end surface of the columnar portion 32 and is a concave curved surface.
The first reflecting portion 35 is formed in a concave conical shape at the center of the light transmitting portion main body 31. The top portion 39 of the first reflecting portion 35 is formed in a spherical shape.

  The first reflecting unit 35 is provided on the optical axis of the LED light source 28 facing the first incident unit 33 and reflects the incident light on the inner surface in a direction away from the optical axis. The second reflecting portion 36 is formed in a concave conical shape at the outer peripheral edge of the light transmitting portion main body 31. That is, the first reflection part 35 and the second reflection part 36 form a total reflection surface.

  The second emission part 38 is formed in a planar shape corresponding to the second reflection part 36. The second emission part 38 is formed as a shared louver. In other words, it also serves as a second emission unit included in the second lamp unit portion 23 adjacent in the vertical direction and the fourth lamp unit portion 25 adjacent in the horizontal direction in FIG.

  The second incident portion 34 is formed around the columnar portion 32 of the translucent portion main body 31. In other words, the second incident portion 34 is provided around the first incident portion 33 on the inner surface of the light transmitting portion main body 31.

  The first emitting portion 37 is formed on the outer surface of the translucent portion main body 31 facing the second incident portion 34 and around the first reflecting portion 35. The first emitting portion 37 is formed with a Fresnel lens 40. Note that a step may be applied instead of the Fresnel lens 40.

  Next, the optical characteristics of the vehicular lamp unit 10 will be described.

  As shown in FIG. 4, when a brake pedal (not shown) is operated, the stop lamp lighting circuit is driven and the LED light source 28 emits light. The emitted light α1 of the LED light source 28 travels straight and enters the first incident portion 33 of the columnar portion 32, and proceeds sideways to enter the second incident portion 34.

  At this time, the first incident portion 33 of the columnar portion 32 is positively irradiated with the emitted light θ1 having a high light amount of the emission angle θ1, for example, θ1 = 10 °, near the optical axis of the LED light source 28 in the first lamp unit portion 22. Thus, the light is guided into the columnar portion 32.

  Incident light α2 incident from the first incident portion 33 is guided into the columnar portion 32 and converted into parallel reflected light α3 traveling in the outer peripheral direction in the light transmitting portion main body 31 by the total reflection surface of the first reflecting portion 35. Converted. Then, the reflected light α3 travels as parallel light toward the second reflecting portion 36.

  At this time, since the incident light α2 is totally reflected by the first reflecting portion 35, it is not emitted from the first reflecting portion 35 to the outside of the light transmitting portion main body 31. Accordingly, since the high-intensity emitted light α1 is not emitted from the first reflecting portion 35, no flashing occurs.

  The reflected light α3 is converted into the reflected light α4 toward the second emitting portion 38 by the total reflection surface of the second reflecting portion 36. And it irradiates toward the vehicle rear as the emitted light (alpha) 5 from the 2nd output part 38. FIG. At this time, the emitted light α5 is emitted together with the emitted light emitted from the second emitting units of the adjacent second lamp unit 23 and fourth lamp unit 25.

  Of the emitted light α1 emitted from the LED light source 28, the incident light α6 that travels laterally and enters the second incident portion 34 is refracted by the second incident portion 34 and is emitted from the light transmitting portion main body 31 to the first emission. It penetrates toward the part 37. The incident light α6 that has reached the first emission part 37 is converted into diffused light α7 and irradiated toward the rear of the vehicle because the first emission part 37 forms the Fresnel lens 40.

  In the vehicle lamp unit 10 of the present embodiment described above, the translucent member 12 is provided at a position where the first incident portion 33 faces the LED light source 28, and has a high light amount among the emitted light α <b> 1 from the LED light source 28. The emitted light α1 in the vicinity of the optical axis is positively incident on the columnar portion 32. In addition, the second incident part 34 is provided around the first incident part 33, and causes the other emitted light α <b> 1 from the LED light source 28 to directly enter the light transmitting part main body 31. The first reflecting part 35 is provided on the front side on the optical axis of the LED light source 28 facing the first incident part 33, and the incident light α2 from the columnar part 32 is internally reflected toward the side away from the optical axis. Let

  In addition, the first emitting portion 37 is provided around the first reflecting portion 35, and diffuses and emits the incident light α6 incident from the second incident portion 34 of the light transmitting portion main body 31 forward. In addition, the second emission part 38 is provided around the first emission part 37 and emits the reflected light α3 internally reflected by the first reflection part 35 forward. As a result, it is possible to improve the light emission accuracy while suppressing the flashing of the central portion, to improve the emission efficiency, and to increase the irradiation area. In addition, the light transmitting portion main body 31 can be thinned.

  In addition, the second reflecting portion 36 is provided around the second incident portion 34, and the reflected light α <b> 3 internally reflected by the first reflecting portion 35 is internally reflected toward the second emitting portion 38. As a result, the high-intensity emitted light α1 in the vicinity of the optical axis can be emitted from the periphery of the first emitting unit 37, and the high-intensity emitted light can be effectively used.

  Further, the columnar portion 32 guides the incident light α <b> 2 incident from the first incident portion 33 to the first reflecting portion 35. As a result, the high-intensity emitted light α1 in the vicinity of the optical axis can be actively guided and efficiently reflected on the entire surface.

  Moreover, the 1st output part 37 is provided with the Fresnel lens or the step. Thereby, the irradiation area can be secured by performing diffusion in the lateral direction.

  Moreover, the 2nd output part 38 serves as at least one part of the 2nd output part of another adjacent lamp unit. Thereby, the brightness of the outer peripheral part of the adjacent 2nd lamp unit part 23 and the 4th lamp unit part 25 is securable.

  Further, as shown in FIG. 5, the same effect can be obtained even if the first emitting portion 57 is a flat surface and the Fresnel lens 41 is provided in the second incident portion 54.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
For example, in the vehicular lamp unit of the present invention, a colored transparent member may be used as the translucent member. Moreover, it is also possible to use the vehicle lamp unit of the present invention for purposes other than the stop lamp.

DESCRIPTION OF SYMBOLS 10 Vehicle lamp unit 12 Translucent member 28 LED light source 32 Columnar part 33 1st incident part 34,54 2nd incident part 35 1st reflection part 36 2nd reflection part 37,57 1st emission part 38 2nd emission part 40 , 41 Fresnel lens

Claims (5)

An LED light source disposed toward the front of the lamp, a translucent member provided near the front of the LED light source, and configured to reflect the emitted light from the LED light source on the inner surface and then emit the light forward. A vehicular lamp unit comprising:
The translucent member has a first incident part for allowing a part of light emitted from the LED light source to enter a position facing the LED light source;
A second incident part provided around the first incident part, for allowing a part of light emitted from the LED light source to be incident;
A first reflecting portion that is provided on the front side on the optical axis of the LED light source facing the first incident portion, and that internally reflects incident light in a direction away from the optical axis;
A first emission part provided around the first reflection part and emitting the incident light incident from the second incidence part forward;
A second emission part provided around the first emission part and emitting the reflected light reflected internally by the first reflection part forward;
A vehicular lamp unit comprising:   The translucent member includes a second reflecting portion that is provided around the second incident portion and reflects the reflected light that is internally reflected by the first reflecting portion toward the second emitting portion. The vehicular lamp unit according to claim 1.   3. The vehicular lamp unit according to claim 1, wherein the translucent member includes a columnar portion that guides incident light incident from the first incident portion to the first reflecting portion. 4.   The vehicular lamp unit according to any one of claims 1 to 3, wherein the first emission unit includes a Fresnel lens or a step.   5. The vehicular lamp unit according to claim 1, wherein the second emission unit also serves as at least a part of a second emission unit of another adjacent lamp unit.

Images