JP6419444B2 - A lamp that represents the light tunnel - Google Patents

Description

  The present invention relates to a lamp that uses a plurality of lenses having three or more optical surfaces that are non-parallel to each other, and that has a depth appearance like a light tunnel.

  2. Description of the Related Art Conventionally, a lamp that gives a sense of depth using a plurality of LEDs as a light source is known. For example, in the lamp 51 shown in FIG. 9, a plurality of LEDs 54 are arranged around the convex mirror 52, a half mirror 55 is arranged in front of the convex mirror 52, and light from the LED 54 is repeatedly reflected by the half mirror 55 and the convex mirror 52, The light transmitted through the half mirror 55 is configured to obtain an appearance with a sense of depth.

  Patent Document 1 describes a vehicular beacon lamp that uses an LED and a half mirror in combination and produces a multi-step depth feeling due to the difference in brightness of a plurality of light emitting lines.

JP 2006-66130 A

  However, according to the conventional lamp 51, it is necessary to use a large number of LEDs 54 as a light source. Further, in order to give a sense of depth, it is necessary to design a long distance between the convex mirror 52 and the half mirror 55, and there is a problem that the thickness of the lamp 51 increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lamp that can realize an appearance with a sense of depth by a thin configuration.

  In order to solve the above problems, a lamp of the present invention includes a light source, a first lens including three or more optical surfaces that are not parallel to each other, and a second lens including three or more optical surfaces that are not parallel to each other. The first lens has a first incident surface on which light from the light source is incident, a spectroscopic surface that reflects part of the incident light on the inner surface and transfers at least part of the remaining incident light to the second lens, and an inner surface. A first exit surface that emits the reflected light to the front of the lamp, and the second lens internally reflects at least a part of the incident light and a second entrance surface on which the light transferred from the first lens is incident. It includes an inner surface reflecting surface and a second emitting surface that emits the light reflected from the inner surface to the front of the lamp.

  Here, a planar light emitter such as an organic EL or an LED can be used as the light source. In particular, the planar light emitter has an advantage that the light source itself can be made thin. Preferably, a planar light emitter is used as the light source, and the first and second lenses and, if necessary, a larger number of lenses can be arranged along the path of the light emitted from the planar light emitter.

  More preferably, it is possible to provide a reflecting mirror that directs the light that is about to pass through the inner reflection surface of the second lens to the front of the lamp so that the light from the light source can be used effectively. As the reflecting mirror, for example, a reflecting film formed on the lens located at the tail end of the lens array, a reflector disposed away from the tail lens, or the like can be used.

  The first and second lenses may be arranged in a separated state or may be arranged in a connected state. In the latter case, a light guide part that allows light from the light source to pass through is provided between the first lens and the second lens, and the light guide part is connected to the first emission surface and the second emission surface when the light source is turned on. You may comprise so that a dark part may be formed in between.

  Further, the angle formed between the first incident surface of the first lens and the spectroscopic surface may be different from the angle formed between the second incident surface of the second lens and the inner reflection surface so that the direction of the emitted light can be changed. The shape of the lens may be various three-dimensional shapes including three or more optical surfaces that are not parallel to each other, such as a triangular prism, a quadrangular prism, a pentagonal prism, and a hexagonal prism.

  Furthermore, preferably, the lamp of the present invention can be used as a vehicular lamp. Specifically, a lamp having the above feature points can be mounted on the vehicle body so that the emission surfaces of the first and second lenses are included in a curved surface that is curved according to the outer shape of the vehicle body.

  According to the lamp of the present invention, a plurality of three-dimensional lenses are combined with the light source, and each lens is provided with three or more optical surfaces that are not parallel to each other. Has an excellent effect.

It is a side view of the lamp which shows one Embodiment of this invention. It is a perspective view which shows the optical effect | action of the lamp of FIG. It is a perspective view which shows the whole shape of an inner lens. It is a side view which shows the lamp provided with the light guide part, and its optical action. It is an elevational view of the vehicular lamp showing a lens shape with a curved exit surface. It is a side view of the lamp provided with the lens from which the angle of a spectral surface differs. It is a side view which shows the lamp | ramp which arranged the lens shifting back and forth. It is a side view which shows the lamp | ramp which provided the planar light-emitting body in the upper and lower sides of the lens row | line | column. It is a side view which shows the conventional lamp.

  Hereinafter, some embodiments in which the present invention is embodied in a vehicular lamp will be described with reference to the drawings. A vehicle lamp 1 shown in FIG. 1 includes an outer lens 3 on the front surface of a housing 2 and a light source 4 and an inner lens 5 on the inner side of the housing 2. The light source 4 includes a light source base 6 below the inner lens 5, and a planar light emitter 7 made of an organic EL is mounted on the upper surface of the light source base 6. Then, the upward light emitted from the planar light emitter 7 is converted into the horizontal direction by the inner lens 5, transmitted through the outer lens 3, and emitted to the front of the lamp 1 (front, side or rear of the vehicle). It has become.

  The inner lens 5 is configured by combining a plurality of (for example, two) lenses 11 and 12. Each of the lenses 11 and 12 is formed in a triangular prism shape having right-angled triangles, and is arranged in two upper and lower stages with the axis line horizontal, and includes three optical surfaces that are not parallel to each other around the horizontal axis line. . On the optical surface of the first lens 11 located at the lower stage, a first incident surface 111 on which light from the planar light emitter 7 is incident, and a part of the incident light is internally reflected and the rest is transferred to the second lens 12. And a first emission surface 113 that emits light reflected from the inner surface to the front of the lamp.

  On the optical surface of the second lens 12 located in the upper stage, a second incident surface 121 on which the light transferred from the first lens 11 is incident, an inner surface reflecting surface 122 that reflects the incident light on the inner surface, and light that is reflected on the inner surface. And a second exit surface 123 that exits the lamp forward. A reflecting mirror 124 is provided on the inner surface reflecting surface 122 of the second lens 12, and all light incident on the second lens 12 is reflected forward by the inner lens reflecting surface 122 and the reflecting mirror 124.

  As shown in FIG. 2, the planar light emitter 7 is formed to have substantially the same size as the first incident surface 111 of the first lens 11 and is disposed so as to face the incident surface 111 from below. The planar light-emitting body 7 is provided with a light-emitting area 71 that represents a design including a logo and a mark, and a non-light-emitting area 72 that defines the outline of the light-emitting area 71. The first and second lenses 11 and 12 are arranged along the path of the light emitted from the planar light emitter 7 so that the emission surfaces 113 and 123 are arranged in the same vertical plane. Then, the light from the light emitting region 71 is guided and reflected by the two-stage lenses 11 and 12 to form the two-stage virtual images V1 and V2 behind the inner lens 5, and the virtual image has a depth feeling like a light tunnel. Can be given.

  According to the vehicular lamp 1 of this embodiment, since the planar light emitter 7 is used as the light source 4 and the two lenses 11 and 12 are arranged along the optical path of the planar light emitter 7, a convex mirror or a half mirror can be used. Compared with the conventional lamp used, the whole can be made thin and small. In addition, since the reflecting mirror 124 is provided on the second lens 12, all the light transmitted through the first lens 11 can be reflected without waste, and the front of the lamp can be illuminated brightly.

  The planar light-emitting body 7 can represent various designs by changing the shape of the light-emitting region 71. In addition, the first and second lenses 11 and 12 can be given directionality according to the application or the mounting location of the vehicular lamp 1. For example, as shown in FIG. 3A, by extending the lenses 11 and 12 in the horizontal direction, the inner lens 5 can be adapted to a horizontally long vehicular lamp. As shown in (b), by extending the lenses 11 and 12 in the vertical direction, the inner lens 5 can be adapted to a vertically long vehicular lamp. As shown in (c), by extending the lenses 11 and 12 in the front-rear and left-right directions in the horizontal plane, the inner lens 5 can be adapted to a vehicle lamp mounted on the vehicle body corner. In any case, since the planar light-emitting body 7 is used for the light source 4, the whole lamp can be comprised compactly.

  In the inner lens 5 shown in FIG. 4, three lenses 11, 12, and 13 are arranged in a mutually connected state. The first lens 11 and the second lens 12 are connected by a light guide unit 21, and the second lens 12 and the third lens 13 are connected by a light guide unit 22. The light guides 21 and 22 function to pass light from the planar light-emitting body 7, so that when the light source 4 is turned on, the dark part 23 is between the first emission surface 113 and the second emission surface 123. The dark portion 24 is formed between the second emission surface 123 and the third emission surface 133. A flat portion 25 for escaping light is formed at the apex of the third lens 13 so that the upper end of the inner lens 5 does not emit light. In the illustrated example, the inner surfaces of the light guide portions 21 and 22 are flat, but the dark portions 23 and 24 can also be formed when this is a curved surface.

  In the vehicular lamp 31 shown in FIG. 5, the four lenses 11, 12, 13, and 14 are connected to the inner lens 5 in the optical axis direction (direction along the light path) of the planar light emitter 7. It is arranged. Each of the lenses 11 to 14 is formed such that the incident surfaces 111, 121, 131, and 141 become narrower as the upper lens is formed, and the exit surfaces 113, 123, 133, and 143 are formed to be included in the common curved surface 32. Yes. The curved surface 32 is curved according to the outer surface shape of the vehicle body B, and emits light from the planar light-emitting body 7 from the front surface of the inner lens 5 to the periphery of the vehicle body.

  In general, the yield of the planar light-emitting body 7 such as an organic EL becomes worse as the size is increased, and the manufacturing cost increases as the outer shape becomes more complicated. The curved surface is disadvantageous in terms of yield and cost than the flat surface. However, according to the vehicular lamp 31 shown in FIG. 5, the plurality of lenses 11 to 14 are arranged in the optical axis direction, and the back surface of the inner lens 5 is a stepped surface. The entire front surface of the inner lens 5 can be made to emit light by using the planar light emitter 7. In addition, since the front surface of the inner lens 5 can be easily curved to match the outer shape of the vehicle body B, the surface light emitter 7 having a flat surface is used, and a part of the outer surface of the vehicle body is surface-emitting. It is also possible to realize a novel appearance as if it were.

  In the inner lens 5 shown in FIG. 6, the angle θ1 formed by the first incident surface 111 of the first lens 11 and the spectral surface 112 is larger than the angle θ2 formed by the second incident surface 121 of the second lens 12 and the inner reflection surface 122. It is set small (θ1 <θ2). Further, the angle θ2 formed by the first incident surface 121 of the second lens 12 and the inner reflective surface 122 is set to be smaller than the angle θ3 formed by the third incident surface 131 of the third lens 13 and the inner reflective surface 132 ( θ2 <θ3). Thus, by making the angles θ1, θ2, and θ3 different (θ1 <θ2 <θ3), the directions of the light emitted from the plurality of lenses 11, 12, and 13 can be changed according to the mounting position and application of the vehicle lamp. It can be changed arbitrarily.

The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the configuration of each part without departing from the spirit of the invention, as exemplified below.
(A) As shown in FIG. 7, the lenses 11, 12, 13 are arranged in a plurality of upper and lower stages at different positions in the front-rear direction.
(B) The inner lens 5 shown in FIG. 1 is turned upside down and the light source 4 is installed on the upper part of the housing 2.
(C) As shown in FIG. 8, the two light sources 4 are installed above and below the housing 2, the first and second lenses 11 and 12 are arranged so that the incident surfaces 111 and 121 face downward, Arrange the fourth lenses 13 and 14 so that the incident surfaces 131 and 141 face upward. In this case, in order to avoid mutual interference of virtual images, it is desirable to provide reflecting mirrors 124 and 134 on the second lens 12 and the third lens 13, respectively.
(D) The present invention is applied to lamps for various uses such as warning lights, beacon lights, signal lights, street lights, and the like.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Light source 7 Planar light-emitting body 11 1st lens 111 1st entrance plane 112 Spectroscopic surface 113 1st exit surface 12 2nd lens 121 2nd entrance surface 122 Inner surface reflective surface 123 2nd exit surface 124 Reflective mirror 21 , 22 Light guide part 23, 24 Dark part 31 Vehicle lamp 32 Curved surface

Claims (6)

A light source, a first lens including three or more optical surfaces non-parallel to each other, and a second lens including three or more optical surfaces non-parallel to each other,
A first incident surface on which the light from the light source is incident; a spectroscopic surface that reflects part of the incident light on the inner surface and transfers at least part of the remaining incident light to the second lens; and an inner surface A first emission surface that emits the reflected light forward of the lamp,
The second lens has a second incident surface on which the light transferred from the first lens is incident, an inner surface reflecting surface that internally reflects at least a part of the incident light, and a second light that emits the light reflected on the inner surface to the front of the lamp. Two exit surfaces,
The light source includes a planar light emitter, a light emitting region that represents the design of the planar light emitter, and a non-light emitting region that defines an outline of the light emitting region,
Using the light from the light emitting region, a first virtual image is formed behind the first lens, and a second virtual image having substantially the same shape as the first virtual image is formed behind the second lens. It is comprised so that the lamp characterized by the above-mentioned.   The lamp according to claim 1, wherein the first and second lenses are arranged along a path of light emitted from the planar light emitter.   The lamp according to claim 1, further comprising a reflecting mirror that directs light that is about to pass through the inner reflection surface of the second lens to the front of the lamp.   A flat surface portion provided between the first lens and the second lens, having a light guide portion for allowing light from the light source to pass through, and escaping light after passing through the light guide portion to the outside of the lamp at the apex of the second lens. The lamp according to claim 1, 2 or 3, wherein the light guide portion forms a dark portion between the first emission surface and the second emission surface when the light source is turned on.   5. The angle between the first incident surface of the first lens and the spectroscopic surface is set to be smaller than the angle formed between the second incident surface of the second lens and the inner reflection surface. 6. Lamps.   The lamp according to any one of claims 1 to 5 is mounted on a vehicle body, and the emission surfaces of the first and second lenses are included in a curved surface that is curved according to the outer shape of the vehicle body. A vehicular lamp characterized in that an incident surface is formed narrower than an incident surface of a first lens.

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