JP7103762B2 - Luminous body - Google Patents

Description

The present invention relates to a light emitter in which a plurality of light source elements are arranged in the longitudinal direction and arranged in a transparent linear tube.

Conventionally, there is known a light emitting body in which a plurality of light source elements are arranged in the longitudinal direction and arranged in a transparent linear tube (see Patent Document 1).

The light emitter 100 shown in FIG. 10 is used for line illumination. In this device, a plurality of circular light emitting elements 101 as a light source are arranged in the longitudinal direction (four in the drawing) and arranged in a transparent linear flexible tube 102.

The tube 102 is formed in a rectangular shape having a cross section (CC'cross section) orthogonal to the longitudinal direction long in the left-right direction. In this tube 102, when the light (light distribution angle is about 120 degrees) emitted from the left and right end portions 101a and 101b of the light emitting element 101 hits the inner corner portions 102a and 102b of the tube 102, the angles thereof. Light spectroscopy is generated in the parts 102a and 102b, and the light is disturbed. The spectroscopy of light depends on the refractive index of the tube 102 (refractive index is about 1.5 to about 2.5) and the thickness of the tube 102 itself. In order to avoid this light spectroscopy, the corner portions 102a and 102b are located outside the light from the light emitting element 101. That is, assuming that the inner width of the tube 102 is y (distance between the corner portions 102a and 102b), the light shines inside the inner width y.

Regarding the light distribution, when the distance between two adjacent light emitting elements 101 is L, y <L <2y, so that one light emitting element 101 covers the covering portion 103. As shown in FIG. 11, the light distribution formed is round and uniform.
Therefore, the light distribution in the region overlapped by the two adjacent light emitting elements 101 is a round shape and the light distribution is in a state where even portions are overlapped.

Japanese Unexamined Patent Publication No. 2016-42480

However, according to the above-mentioned conventional technique, there is a problem that the inner width of the tube cannot be narrowed to a certain level or more, and the light uniformity between two adjacent light emitting elements cannot be further improved. there were.
Therefore, an object of the present invention is to provide a light emitting body capable of narrowing the inner width of the tube and increasing the uniformity of light between two adjacent light emitting elements.

The invention according to claim 1 supplies electricity to a plurality of light emitting elements which have an upward direction orthogonal to the longitudinal direction and are arranged at equal intervals along the longitudinal direction and the plurality of light emitting elements. A light-transmitting tube that covers the top, bottom, left, and right sides of the light-emitting element and has a cross section of the same shape in the longitudinal direction. It has an overcoat portion that linearly covers the top of the element, left and right covering portions that cover the left and right sides of the light emitting element, and left and right curved portions that connect the overcover portion and the left and right covering portions with an outwardly convex curved surface . The curved portion is an arcuate arcuate portion, and the right and left upper end portions of the light emitting element are centered at 0 degrees, and the arcuate portion is from 0 degrees to 60 degrees . It is characterized in that it is formed over an angular range.

The invention according to claim 2 is characterized in that, in the light emitting body according to claim 1, the electrode and the tube are flexible.

According to the invention of claim 1, in a cross section orthogonal to the longitudinal direction of the tube, a curved portion connecting the top covering portion and the left and right covering portions with a convex curve instead of the portion corresponding to the corner portion of the conventional rectangle. The curved part is an arc-shaped arc part, and the right and left upper ends of the light emitting element are centered on 0, and the arc part is at an angle of 0 to 60 . It is formed over a range. As a result, it is possible to reduce the horizontal dimension of the tube, that is, the inner width, with respect to the light emitting element having the same horizontal dimension and the same distance to the covering portion as in the conventional case. Further, the light distribution in the area where the two adjacent light emitting elements overlap is conventionally the light distribution in the state where the round and even parts are overlapped, whereas the light distribution in the state where the parts close to the square are overlapped. Since the light is distributed, the uniformity of light can be improved accordingly.

According to the invention of claim 2 , the light emitting body as a whole can be made flexible.

Top view, AA'cross section, BB' cross section, CC' cross section of the light emitter 1. It is a figure which shows typically the cross section orthogonal to the longitudinal direction of the light emitting body 1 in the state which the tube 30 is removed. It is a perspective view which shows typically the electrical connection of the light emitting body 1 in the state which the tube 30 is removed. It is an enlarged view of the cross section of AA'in FIG. It is an enlarged view of the cross section of BB'in FIG. It is an enlarged view of the CC'cross section in FIG. In the present embodiment, the light distribution diagram, which has been round and uniform in the past, is an image diagram for explaining how the light distribution diagram approaches a square. It is a light distribution diagram of the light emitting body 1 of this embodiment. It is a figure explaining the inner width x of the light emitting body 1 of this embodiment, and the inner width y of the conventional light emitting body 100. Top view, AA'cross section, BB' cross section, CC' cross section of the conventional light emitter 100. It is a light distribution diagram of a conventional light emitter 100.

Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. In each drawing, the members and the like having the same reference numerals have the same or similar configurations, and duplicate description thereof will be omitted as appropriate. Further, in each drawing, members and the like that are not necessary for explanation are omitted as appropriate.
<Embodiment 1>
The luminescent material according to the first embodiment to which the present invention is applied will be described with reference to FIGS. 1 to 9.

Here, FIG. 1 is a top view, a cross section of AA', a cross section of BB', and a cross section of CC'of the light emitting body 1. FIG. 2 is a diagram schematically showing a cross-sectional view of the light emitting body 1 in a state where the tube 30 is removed, which is orthogonal to the longitudinal direction. FIG. 3 is a perspective view schematically showing an electrical connection of the light emitter 1 with the tube 30 removed. FIG. 4 is an enlarged view of a cross section taken along the line AA'in FIG. FIG. 5 is an enlarged view of a cross section of BB'in FIG. FIG. 6 is an enlarged view of a CC'cross section in FIG. FIG. 7 is an image diagram illustrating how a round and uniform light distribution diagram approaches a square in the present embodiment. FIG. 8 is a light distribution diagram of the light emitting body 1 of the present embodiment. FIG. 9 is a diagram illustrating an inner width x of the light emitting body 1 of the present embodiment and an inner width y of the conventional light emitting body 100.
As shown in FIGS. 1 to 3, the light emitting body 1 includes a light emitting element 10, an electrode 20, and a tube 30.

As the light emitting element 10, for example, a COB (Chip on Board) type LED can be used. The light emitting element 10 is formed as a set of a large number of LEDs, and each LED generates directional light having a light distribution angle of about 120 degrees. That is, when viewed microscopically, the light emitting surface 11 of the light emitting element 10 serves as a planar light source, and light is emitted from each LED at a light distribution angle of 120 degrees from any location. In the light emitting element 10, the light emitting surfaces 11 are arranged upwards orthogonal to the longitudinal direction, and a plurality of light emitting elements 10 are arranged at equal intervals along the longitudinal direction. The light emitting surface 11 is covered from above by a square cover 12 whose center is hollowed out in a circular shape, and is formed in a circular shape.

As shown in FIGS. 2 and 3, the electrode 20 includes a + electrode 21 and a − electrode 22 that are long in the longitudinal direction. The + electrode 21 and the − electrode 22 are connected to the light emitting element 10 via solders 23 and 24, respectively. The + electrode 21 and the-electrode 22 are covered with insulating sheets 25 and 26 on the front and back surfaces. The + electrode 21 and the − electrode 22 are connected to the DC power supply 29 via lead wires 27 and 28 soldered to each of the + electrode 21 and the − electrode 22. The + electrode 21 and the-electrode 22 are flexibly configured.

The tube 30 is a light-transmitting tube that covers the top, bottom, left, and right of the light emitting element 10 and the electrode 20 and has a cross section having the same shape in the longitudinal direction. The tube 30 is made of a transparent synthetic resin, and the synthetic resin has a refractive index of about 1.5 to about 2.5.

Further, the tube 30 has a cross section orthogonal to the longitudinal direction of the light emitting element 10, a top covering portion 31 that linearly covers the top (upper side) of the light emitting element 10, left and right covering portions 32, 33 that cover the left and right sides, and an top covering portion. It has a curved portion that connects 31 and the left and right covering portions 32 and 33 with an outwardly convex curved surface.

Further, in the present embodiment, the left and right curved portions are arcuate left and right arc portions 34 and 35. The left and right arc portions 34 and 35 are set at the left and right ends of the light emitting surface 11, that is, the left and right upper end portions 11a and 11b in the cross section (CC'cross section) orthogonal to the longitudinal direction of the light emitting element 10. There is. The left and right arc portions 34 and 35 are centered on the left and right upper end portions 11a and 11b, and continue from directly above the center to a portion facing outward by at least 60 degrees. This 60 degrees is half of 120 degrees of the light distribution angle of the light emitting element 10.

As shown in FIGS. 6 and 8, the left and right covering portions 32 and 33 are portions continuous with the above-mentioned left and right arc portions 34 and 35. In the present embodiment, the arc portions 34 and 35 continue beyond 60 degrees to about 80 degrees, and the left and right covering portions 32 and 33 open slightly downward to the arc portions 34 and 35 via a tangent line. It is continuous in a straight line in the shape of a "H".
Since the left and right covering portions 32 and 33 are portions that are not exposed to light and deviate from 60 degrees, which is half of the light distribution angle of 120 degrees, the shape can be extremely arbitrary.

The undercover portion 36 is a portion that horizontally connects the lower ends of the left and right covering portions 32 and 33. In the present embodiment, the top covering portion 31, the left and right covering portions 32, 33, the left and right arc portions 34, 35, and the undercover portion 36 are formed to have the same thickness.

The tube 30 described above has a so-called "kamaboko type" shape, and has a cross section orthogonal to the longitudinal direction as described above, such as the top covering portion 31, the left and right covering portions 32, 33, the arc portions 34, 35 connecting these, and the arc portions 34, 35. It is formed by an undercover portion 36. The cross-sectional shape of the tube 30 is the same in terms of the longitudinal method.
According to the light emitting body 1 described above, the following actions and effects can be obtained.

-In the cross section orthogonal to the longitudinal direction of the tube 30, instead of the portions corresponding to the conventional rectangular corner portions 102a and 102b (see FIG. 11), as shown in FIG. 8, the top covering portion 31 and the left and right covering portions 31 , 32 has a curved portion connecting with a convex curve. As a result, the same light emitting element 10 as the conventional light emitting element 101 is used, and the distance from the light emitting surface 11 of the light emitting element 10 to the covering portion 31 is the same, and the refractive index is the same. It is possible to reduce the dimension, that is, the inner width x. Further, the light distribution in the region where the two adjacent light emitting elements 10 and 10 overlap is conventionally the light distribution in a state in which round and even portions are overlapped as shown in FIG. Since the light distribution is in a state where the portions close to the square as shown in FIG. 8 are overlapped, the uniformity of the light can be improved accordingly.
Here, with reference to FIG. 9, the effect of the invention of claim 2 will be described in comparison with the conventional illuminant 100 shown in FIG.
As described with reference to FIG. 10, the inner width y of the tube 102 of the conventional light emitter 100 is such that light shines inside the inner width y.

On the other hand, the same light emitting body 1 as the conventional light emitting body 100 is used, and the inner height z is the same as the inner height z of the conventional light emitting body 100 (the distance from the light emitting surface 11 of the light emitting body 1 to the tube 30 is set. When the refractive index (about 1.5 to about 2.5) of the tube 30 is the same and the thickness of the tube 30 is the same as the conventional one, the inner width x is as shown in FIG. To,
x <y
Will be.

Here, as shown in FIG. 8, x is an intersection of the left and right arc portions 34, 35 and a straight line extending 60 degrees outward from directly above the upper end portions 11a, 11b with the upper end portions 11a, 11b as the center. The shape of the left and right covering portions 32, 33, etc., which is the distance between the two and is located below the intersection, can be arbitrary.

-From FIG. 9, it can be seen that x <y. That is, it can be seen that the inner width x of the tube 30 of the present embodiment can be made smaller than the inner width y of the conventional tube 102.

Further, the light distribution of the portion overlapped by the two adjacent light emitting elements 10 and 10 is conventionally such that the round and even portions shown in FIG. 11 are overlapped, whereas in the present embodiment, FIG. Since the portions close to the squares shown in FIG. 8 are overlapped with each other, it is possible to obtain high uniformity.
-By forming the electrode 20 and the tube 30 with a flexible material, the entire illuminant 1 can be flexibly configured.

1 Light emitter 10 Light emitting element 11 Light emitting surface 11a Left and right upper ends 11b Left and right upper ends 20 Electrodes 30 Tube 31 Top cover 32 Left and right cover 33 Left and right cover 34 Left and right arcs 35 Left and right arcs x Tube Inner width y Inner width of conventional tube

Claims (2)

A plurality of light emitting elements having directivity upward orthogonal to the longitudinal direction and arranged at equal intervals along the longitudinal direction,
An electrode that supplies electricity to the plurality of light emitting elements and
A light transmitting tube that covers the top, bottom, left, and right of the light emitting element and has a cross section having the same shape in the longitudinal direction is provided.
The tube has a cross section orthogonal to the longitudinal direction of the light emitting element, a cover portion that linearly covers the light emitting element, left and right covering portions that cover the left and right sides of the light emitting element, and the top covering portion and the left and right covering portions. It has left and right curved parts that connect the parts with a convex curved surface to the outside.
The curved portion is an arcuate arcuate portion, and the curved portion is an arcuate arcuate portion.
The right and left upper ends of the light emitting element are centered at 0 degrees, and the arc portion is formed over an angle range from 0 degrees to 60 degrees .
A luminous body characterized by that. The electrodes and tubes are flexible.
The light emitter according to claim 1.

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