JP2019197743A - Vehicular light emitting device - Google Patents

Abstract

To enable performance which shows as if there were many more light sources than the actual number of the light sources, and to reduce unevenness in luminance.SOLUTION: In a vehicular light emitting device, a plurality of light emitting units 100 each of which has an LED part 20 and a lens 30 for diffusing and emitting the light entered from the LED part 20 are arranged side by side. Even between the plurality of light emitting units 100, one or more peak values in luminance exist. Also, the light emitted from the lenses of the light emitting units 100 has a plurality of peaks in luminance with respect to the spread direction of the light, and the arrangement interval of the plurality of light emitting units 100 is set so that the plurality of peaks in luminance of the light emitted from the plurality of light emitting units 100 are arrayed substantially at equal intervals.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle light-emitting device, and more particularly to a vehicle light-emitting device including a plurality of light sources.

  Some vehicle light emitting devices include a plurality of light sources. In such a light emitting device for a vehicle, various lighting effects may be produced by simultaneously or sequentially illuminating a plurality of light sources.

  For example, in the following Patent Document 1, in a vehicle light-emitting device including a plurality of LEDs, a structure in which light from each LED is reflected and diffused over a wide range in order to suppress uneven brightness in light emitted from the LEDs. Is provided.

JP 2012-17063 A

  If light from a plurality of light sources is reflected and mixed in order to suppress luminance unevenness of the plurality of light sources, it is unclear which light source is shining, and there is a risk that the lighting performance will be reduced. On the other hand, when the number of light sources is increased, there are problems in terms of power consumption and cost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicular light emitting device capable of producing an effect so that there are more light sources than the actual number of light sources and reducing unevenness in luminance. There is.

  The problem is that a plurality of light emitting units including a light source and a lens that diffuses and emits light incident from the light source are arranged side by side, and one or more luminance peak values are also present between the plurality of light emitting units. This is solved by the existing vehicle light emitting device.

  In the above vehicle light-emitting device, it is possible to produce more light sources than the actual number of light sources by having at least one luminance peak between a plurality of light-emitting units each having a light source. And uneven brightness can be reduced.

  In the vehicle light-emitting device, the light emitted from the lens of the light-emitting unit has a plurality of luminance peaks with respect to a light spreading direction, and a plurality of light emitted from the plurality of light-emitting units. The arrangement intervals of the plurality of light emitting units may be set so that luminance peaks are arranged at substantially equal intervals. As a result, the luminance peaks of the light emitted from the plurality of light emitting units are substantially equidistant, so that the luminance unevenness can be further reduced.

  The vehicle light emitting device may include a holding unit that holds the plurality of light emitting units, and the holding unit may include a reflecting unit that reflects light emitted from the lens toward a light emitting surface. Thereby, the irradiation direction of light can be adjusted.

  In the above-described vehicle light emitting device, the reflecting portion may be formed with a convex portion at a position facing the light source. Thereby, the reflection direction of the light in a reflection part can be adjusted, and also brightness nonuniformity can be reduced.

  In the above-described vehicle light-emitting device, the holding portion may be formed with a recess between regions that hold the plurality of light-emitting units. Thereby, the reflection direction from the holding | maintenance part side can be controlled, and a brightness nonuniformity can be reduced.

  The vehicle light-emitting device includes a cover that engages with the holding portion and covers the plurality of light-emitting units, and the cover has a distance from the lens at the end of the light emission side of the lens. It may be a close shape. Thereby, it can suppress that light diffuses to the cover side.

  In the above-described vehicle light emitting device, the lens may have a locking claw portion at both ends, and may be snap-fixed to the holding portion by the locking claw portion. Thereby, a lens can be stably attached to a holding part.

  In the above-described vehicle light emitting device, the lens may be formed with a rib for restricting rotation with respect to the holding portion. Thereby, since rotation with respect to the holding | maintenance part of a lens is controlled, the irradiation direction of light can be stabilized. Furthermore, since the movement of the lens during the vibration of the vehicle is also restricted, the generation of noise caused by the collision of the lens with another member is also suppressed.

  In the above-described vehicle light emitting device, the lens may have a notch formed at a position facing the light source. Thereby, the light incident on the lens can be refracted in the diffusing direction.

  In the above-described vehicle light-emitting device, the lens may include a light source introduction portion provided on both sides of the notch and protruding toward the light source. Thereby, since the position of the light source with respect to the lens can be easily determined, the positioning accuracy between the light source and the lens can be improved.

  According to the present invention, it is possible to produce as if there are more light sources than the actual number of light sources, and uneven brightness can be reduced.

  According to one aspect of the present invention, since the luminance peaks of light emitted from a plurality of light emitting units are substantially equidistant, the luminance unevenness can be further reduced.

  According to one aspect of the present invention, the light irradiation direction can be adjusted.

  According to one aspect of the present invention, it is possible to adjust the direction in which light is reflected at the reflecting portion, and to reduce luminance unevenness.

  According to one aspect of the present invention, it is possible to control the reflection direction from the holding unit side and reduce luminance unevenness.

  According to one aspect of the present invention, it is possible to prevent light from diffusing to the cover side.

  According to one aspect of the present invention, the lens can be stably attached to the holding portion.

  According to one aspect of the present invention, since the rotation of the lens with respect to the holding unit is restricted, the light irradiation direction can be stabilized.

  According to one aspect of the present invention, light incident on a lens can be refracted in a diffusing direction.

  According to one aspect of the present invention, since the position of the light source with respect to the lens can be easily determined, the positioning accuracy between the light source and the lens can be improved.

It is a top view of the light-emitting device for vehicles concerning a 1st embodiment. It is II-II sectional drawing of FIG. It is a perspective view in the state where the cover of the light-emitting device for vehicles concerning a 1st embodiment was removed. It is a figure which shows the characteristic of the luminance peak of the light emission unit in the light-emitting device for vehicles which concerns on 1st Embodiment. It is a figure which shows the characteristic of the luminance peak of the several light emission unit by which the arrangement | positioning space | interval in the vehicle light-emitting device which concerns on 1st Embodiment was set. It is a top view of the light-emitting device for vehicles concerning a 2nd embodiment. It is VII-VII sectional drawing of FIG. The structural example of the lens at the time of providing a rotation control mechanism is shown, (A) is a top view of the light emission unit containing a lens, (B) is a side view of (A). It is a figure explaining the shape of the light emission unit group which connected the several light emission unit. It is a top view of the light-emitting device for vehicles concerning a 3rd embodiment. It is XI-XI sectional drawing of FIG. It is a figure which shows the characteristic of the luminance peak of the light emission unit which concerns on 3rd Embodiment. It is a figure which shows the characteristic of the luminance peak of the several light emission unit by which the arrangement | positioning space | interval in the vehicle light-emitting device which concerns on 3rd Embodiment was set.

  Hereinafter, a vehicle light emitting device according to an embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, a plurality of light emitting units including a light source and a lens that diffuses and emits light incident from the light source are arranged side by side, and one luminance peak value is also present between the plurality of light emitting units. The present invention relates to an invention of a light emitting device for a vehicle that exists as described above.

<First Embodiment>
First, based on FIGS. 1-5, the vehicle light-emitting device 1 which concerns on the 1st Embodiment of this invention is demonstrated.

  1 is a plan view of the vehicle light emitting device 1 according to the first embodiment, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a view in which the cover 50 of the vehicle light emitting device 1 is removed. It is a perspective view of a state.

  As shown in FIG. 1, the vehicle light emitting device 1 mainly includes a cover 50, an LED unit 20 serving as a light source, a lens 30 that diffuses and emits light incident from the LED unit 20, an LED unit 20, a lens 30, and the like. Is provided with a holder 10 (holding portion) for holding the. In addition, the holder 10 is provided with a reflecting portion 11 having a mirror finish made up of a convex portion 12 and a flat portion 13, and the reflecting portion 11 allows refracted light from the lens 30 to pass through the window portion 51 (light emitting surface) of the cover 50. ) To reflect. In the following, the emission direction of the LED unit 20 (that is, the side from the LED unit 20 toward the notch) is the front, the opposite is the rear, the side far from the center of the lens 30 is the outside, and the opposite is the inside. .

  As shown in FIG. 1, the lens 30 includes a lens main body 31, a notch 32 provided in the center of the lens main body 31 and facing the LED unit 20, and a rear side of the notch 32. A light source introduction portion 33 that protrudes toward the LED portion 20, introduces incident light from the LED portion 20, protrudes outward from both sides of the lens body portion 31, and includes an attachment structure portion 34 for attaching the lens 30 to the holder 10. ing. Note that a locking claw portion 35 is provided at the rear side end portion of the mounting structure portion 34, and is snap-fitted to the holder 10 by the locking claw portion 35.

  Here, as shown in FIG. 1, the curvature of the notch 32 is larger than the curvature (for example, average curvature) of the front edge of the lens body 31. In addition, the curvature of the front edge part of the lens main-body part 31 may be constant, and may not be constant. When it is not constant, for example, the curvature at the center of the front edge may be made smaller than the curvature outside the center.

  Further, as shown in FIGS. 1 to 3, one LED unit 20 is connected to each of the plurality of lenses 30 in the series direction (that is, the central axis of the lens 30 and the optical axis of the LED unit 20 are parallel (also coincident). The light emitting unit 100 is a combination of the lens unit 30 and the lens unit 30 arranged in series. Thus, the light emitting unit 100 can be thinned by configuring the light emitting unit 100 by arranging the LED unit 20 and the lens 30 in series. By mounting such a thin light-emitting unit 100, the vehicle light-emitting device 1 can be thinned, so that the degree of freedom of installation in the vehicle can be increased.

  As shown in FIG. 1, the vehicle light emitting device 1 includes a plurality of light emitting units 100, and the plurality of light emitting units 100 are arranged in parallel with the longitudinal direction of the window portion 51. Here, as shown in FIG. 1 and FIG. 3, the light emitting unit 100 adjacent to the light emitting unit 100 is provided with a convex portion 12 at a position facing the light emitting unit 100 (that is, the LED unit 20) in the reflecting portion 11. A plane portion 13 is provided between the positions facing each other (that is, between the convex portion 12 and the convex portion 12). By doing so, it is possible to adjust the direction of light reflection in the reflecting section 11 and to further reduce luminance unevenness.

  As shown in FIG. 2, the cover 50 has a shape inclined toward the lens 30 from the rear to the front of the lens 30. In particular, the cover 50 and the lens 30 are closest to each other at the front end of the lens 30. ing. Thereby, since it can suppress that the light radiate | emitted from the front edge part of the lens 30 reflects in the cover 50 and returns to the back side rather than the window part 51, it is outside the light-emitting device 1 for vehicles from the window part 51. It can suppress that the brightness | luminance of the irradiated light falls. In addition, below, let the window part 51 side of the light-emitting device 1 for vehicles be a light emission surface side, and let the opposite side be a back surface side.

  As shown in FIG. 2, the holder 10 includes a holder base region 16 that extends from the front to the rear, and a rear end portion of the holder base region 16 that extends to the back side, and the LED unit 20 is fixedly attached. The LED mounting region 17, the lens fixing region 18 that extends from the holder base region 16 to the light emitting surface side, the lens 30 is mounted and fixed, and the front end of the holder base region 16 extends to both the light emitting surface side and the back surface side. And a reflecting portion forming region 19 where the reflecting portion 11 is provided on the slope facing the lens 30 on the light emitting surface side. Here, the angle (slope) of the reflecting surface may be set so that the intensity of the reflected light from the lens 30 to the window 51 is maximized.

  As shown in FIG. 3, the lens fixing region 18 of the holder 10 has an insertion hole 14 through which the light source introduction portion 33 of the lens 30 is inserted, and a rear end portion (locking claw) of the mounting structure portion 34 of the lens 30. Insertion holes 15 through which the portion 35 is inserted are provided.

  Further, a control circuit (not shown) is connected to the LED unit 20, and the light emission timing, the light emission time, etc. of each of the plurality of LED units 20 are controlled by the control circuit. As a result, a plurality of LED units 20 can emit light at the same time, a part of the plurality of LED units 20 can emit light, or the plurality of LED units 20 can emit light to flow from side to side. can do.

  Next, based on FIG.4 and FIG.5, the luminance characteristic of the light emission unit 100 with which the light-emitting device 1 for vehicles which concerns on 1st Embodiment is equipped, and the luminance characteristic of the several light emission unit 100 are demonstrated.

  FIG. 4 shows luminance characteristics of the single light emitting unit 100. FIG. 4 shows the relationship between the position on the light emitting surface on the front side of the single light emitting unit 100 (that is, the position in the width direction of the light emitting surface) and the luminance. As shown in FIG. 4, in the light emitting unit 100, the LED unit 20 has a first luminance peak at a position passing through the center of the notch 32, and two luminances on the left and right sides of the first luminance peak. There are peaks (second luminance peak and third luminance peak). Thus, in the spreading direction of the light emitted from the light emitting unit 100, depending on the shape (particularly size and curvature) of the lens body 31 of the lens 30 and the shape (particularly size and curvature) of the notch 32, A plurality of luminance peaks will appear.

  FIG. 5 shows luminance characteristics when a plurality of light emitting units 100 are arranged at a predetermined arrangement interval (D). FIG. 5 shows the relationship between the position on the light emitting surface on the front side of the plurality of light emitting units 100 and the luminance. As shown in FIG. 5, by adjusting the arrangement interval of the light emitting units 100, the luminance peaks on the light emitting surface can be made substantially equal. By adjusting the arrangement interval of the light emitting units 100 in this way, a peak also exists between the positions facing the light emitting units 100 on the light emitting surface. It is possible to produce as many light sources as possible, and luminance unevenness can be reduced. Moreover, luminance unevenness can be further reduced by setting the luminance peaks at substantially equal intervals.

<Second Embodiment>
Next, based on FIG.6 and FIG.7, 1 A of light-emitting devices for vehicles which concern on the 2nd Embodiment of this invention are demonstrated.

  FIG. 6 is a plan view of the vehicle light emitting device 1A according to the second embodiment, and FIG. 7 is a sectional view taken along line VII-VII in FIG. The light emitting unit 100 mounted on the vehicle light emitting device 1A according to the second embodiment is the same as that of the first embodiment, and thus the description thereof is omitted. In the following, differences from the first embodiment will be mainly described.

  As shown in FIGS. 6 and 7, in the vehicle light emitting device 1 </ b> A according to the second embodiment, the structures of the cover 50 </ b> A and the holder 10 </ b> A are different from those in the vehicle light emitting device 1 according to the first embodiment. That is, as shown in FIG. 7, in the second embodiment, the light emitting unit 100 and the window portion 51A of the cover 50A are disposed in series, and the holder 10A is not provided with the reflection portion forming region 19. This is different from the first embodiment. Furthermore, in the second embodiment, a bowl-shaped recess 60 is formed on the surface between the adjacent light emitting units 100 on the light emitting surface side of the base of the holder 10A (holder base region 16A). This is different from the first embodiment. In addition, the recessed part 60 is good also as being formed so that a width | variety may become small gradually from the front end part of 16 A of holder base area | regions to the center position of the lens 30 grade.

  By forming the bowl-shaped recess 60 in the holder base region 16A as described above, it is possible to control the reflection direction from the holder 10A side and reduce luminance unevenness.

  Here, based on FIG. 8 and FIG. 9, another configuration example of the lens 30 mounted on the vehicle light emitting device 1 (which can be similarly applied to 1 </ b> A) will be described.

  FIG. 8 shows a configuration example of the lens 30 when the lens 30 is provided with a rotation restricting mechanism for the holder 10. 8A shows a plan view of the light emitting unit 100 including the lens 30 fixed to the holder 10, and FIG. 8B shows a side view of FIG. 8A. As shown in FIGS. 8A and 8B, ribs 36 projecting vertically from the attachment structure 34 are provided on both surfaces of the attachment structure 34 of the lens 30 of the light emitting unit 100.

  As shown in FIG. 8 (B), the rib 36 performs a swinging motion of the lens 30 with respect to the holder 10 (that is, a rotational motion in which the front end of the lens 30 approaches or moves away from the holder base region 16). The ribs 36 of the 30 abut against the lens fixing region 18 of the holder 10 to perform a regulation function. Thereby, since the movement which the lens 30 deviates from the original arrangement | positioning with respect to the holder 10 or the LED part 20 can be controlled, the irradiation direction from the light emission unit 100 can be stabilized. Further, since the movement of the lens 30 is restricted, the lens 30 is prevented from colliding with other members even during the vibration of the vehicle, and the noise is reduced.

  In the above embodiment, an example of a structure in which a single light emitting unit 100 is attached to the holder 10 has been described. However, as illustrated in FIG. 9, a light emitting unit group 101 in which a plurality of light emitting units 100 are connected by a connecting portion 37 is provided. You may make it attach to the holder 10. FIG.

<Third Embodiment>
Next, a vehicle light emitting device 1B according to a third embodiment of the present invention will be described with reference to FIGS.

  FIG. 10 is a plan view of the vehicle light emitting device 1B according to the third embodiment, and FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG.

  As shown in FIG. 10, the vehicular light emitting device 1B according to the third embodiment mainly includes a cover 50B, an LED unit 20 serving as a light source, a lens 30B that diffuses and emits light incident from the LED unit 20, A holder 10B (holding unit) that holds the LED unit 20, the lens 30B, and the like is provided. The holder 10B is provided with a reflecting portion 11 having a mirror finish, and the reflecting portion 11 reflects the refracted light from the lens 30B toward the window portion 51B (light emitting surface) of the cover 50. ing.

  As shown in FIG. 10, the lens 30 </ b> B includes a lens main body 31 </ b> B and a notch 32 </ b> B provided at a position facing the LED unit 20 in the center of the lens main body 31 </ b> B. In the following, the LED unit 20 arranged in series with the lens 30B is collectively referred to as a light emitting unit 100B.

  As shown in FIG. 11, the cover 50B has a U-shape, and the light emitting surface forming surface provided with the window 51B in the cover 50B and the lens 30B are substantially parallel to each other. Further, the length of the light emitting surface forming surface in the front-rear direction (length in the direction perpendicular to the arrangement direction of the light emitting units 100B) is longer than that in the first embodiment. Hereinafter, the window 51B side of the vehicle light emitting device 1B is the light emitting surface side, and the opposite side is the back surface side.

  Further, as shown in FIG. 11, the holder 10 is substantially parallel to the lens 30B from the LED mounting region 17B that supports the lens 30B and the U-shaped LED mounting region 17B to which the LED unit 20 is mounted and fixed. It has a holder base region 16B that extends, and a reflection portion forming region 19B that extends from the holder base region 16B to the light emitting surface side and is provided with the reflecting portion 11 on the inclined surface that is on the light emitting surface side and faces the lens 30B. Here, the angle (slope) of the reflecting surface may be set so that the intensity of the reflected light from the lens 30B to the window 51B is maximized.

  Further, a control circuit (not shown) is connected to the LED unit 20, and the light emission timing, the light emission time, etc. of each of the plurality of LED units 20 are controlled by the control circuit.

  Here, as shown in FIG. 10, the lens 30B mounted on the vehicle light emitting device 1B according to the third embodiment is the same as the lens 30 mounted on the vehicle light emitting device 1 according to the first embodiment. The lens body 31 (31B) and the notch 32 (32B) are different in the R shape. That is, in the third embodiment, the curvature of the lens body 31B is larger than the curvature of the lens body 31 in the first embodiment. In the third embodiment, the notch 32B The curvature is smaller than the curvature of the notch 32 in the first embodiment. Thus, by adjusting the R shape of the lens, as shown in FIG. 12 and FIG. 13, the diffusion mode of light from the lens can be adjusted and the luminance pattern can be changed.

  FIG. 12 shows the luminance characteristics of a single light emitting unit 100B according to the third embodiment. FIG. 12 shows the relationship between the position of the light emitting surface on the front side of the single light emitting unit 100B (that is, the position in the width direction of the light emitting surface) and the luminance. As shown in FIG. 12, in the light emitting unit 100 </ b> B, a gentle luminance peak is present at a position passing from the LED unit 20 through the center of the notch 32 compared to the light emitting unit 100 according to the first embodiment. . That is, the lens 30B according to the third embodiment emits diffused light with reduced luminance unevenness as compared with the lens 30 according to the first embodiment.

  FIG. 13 shows luminance characteristics when a plurality of light emitting units 100B according to the third embodiment are arranged at a predetermined arrangement interval (d). FIG. 13 shows the relationship between the light emitting surface position on the front side of the plurality of light emitting units 100B (that is, the position in the width direction of the light emitting surface) and the luminance. As shown in FIG. 13, by adjusting the arrangement interval of the light emitting units 100B, a luminance peak also exists between the positions facing the light emitting units 100B. In this way, by adjusting the arrangement interval of the light emitting units 100B and causing a peak to exist between the positions facing the light emitting units 100B on the light emitting surface, luminance unevenness on the light emitting surface can be reduced.

  As described above, regarding the light emitting unit mounted on the vehicle light emitting device, the diffusion mode of the light from the lens changes by changing the R shape of the lens that diffuses the light incident from the LED unit. . For example, in the vehicle light emitting device 1 according to the first embodiment, since the light emitting unit is reduced in size by making the curvature of the outer periphery of the lens smaller than that of the lens in the third embodiment, the light emitting unit is mounted. The light emitting device for a vehicle can be downsized. In this way, by setting the R shape of the lens, the vehicle light emitting device in which unevenness in luminance is suppressed can be made to correspond to the size of the space required by the vehicle.

  In the above, the vehicle light-emitting device according to the first to third embodiments according to the present invention has been mainly described. However, said embodiment is only an example for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

1, 1A, 1B Vehicle light emitting device 10, 10A, 10B Holder 11 Reflection portion 12 Protrusion portion 13 Plane portion 14, 15 Insertion hole 16, 16A, 16B Holder base region 17, 17B LED mounting region 18 Lens fixing region 19, 19B Reflection part formation area 20 LED part 30, 30B Lens 31, 31B Lens body part 32, 32B Notch part 33 Light source introduction part 34 Mounting structure part 35 Locking claw part 36 Rib 37 Connection part 50, 50A, 50B Cover 51, 51A , 51B Window 60 Recess 100, 100B Light emitting unit 101 Light emitting unit group

Claims (10)

A plurality of light emitting units including a light source and a lens that diffuses and emits light incident from the light source are arranged side by side,
One or more luminance peak values exist between the plurality of light emitting units, and the vehicle light emitting device. The light emitted from the lens of the light emitting unit has a plurality of luminance peaks in the light spreading direction,
The arrangement interval of the plurality of light emitting units is set so that a plurality of luminance peaks of light emitted from the plurality of light emitting units are arranged at substantially equal intervals. A light emitting device for a vehicle. A holding unit for holding the plurality of light emitting units;
The vehicle light-emitting device according to claim 1, wherein the holding unit includes a reflection unit that reflects light emitted from the lens toward a light-emitting surface.   The vehicular light emitting device according to claim 3, wherein the reflecting portion is formed with a convex portion at a position facing the light source.   5. The vehicle light emitting device according to claim 3, wherein the holding portion has a recess formed between regions where the plurality of light emitting units are held. A cover that engages with the holding portion and covers the plurality of light emitting units;
The light emitting device for a vehicle according to any one of claims 3 to 5, wherein the cover has a shape that is closest to the lens at an end of the lens on the light emission side. .   The light emitting device for a vehicle according to any one of claims 3 to 6, wherein the lens has a locking claw portion at both ends, and is snap-fixed to the holding portion by the locking claw portion. .   The vehicle light emitting device according to any one of claims 3 to 7, wherein the lens is formed with a rib for restricting rotation with respect to the holding portion.   The vehicle light emitting device according to any one of claims 1 to 8, wherein the lens has a notch formed at a position facing the light source. The vehicle light-emitting device according to claim 9, wherein the lens includes a light source introduction portion that is provided on both sides of the notch and protrudes toward the light source.

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