JP2012113925A - Led lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting fixture capable of obtaining aimed light distribution without having optical leakage.SOLUTION: The LED lighting fixture 10 includes an LED substrate 11 mounting LED chips 12, a lens 13 having a lens substrate section 14 and a plurality of lens sections 15 formed on the lens substrate section 14 and arranged in front of the LED substrate 11 so as to make at least one of the plurality of lens sections 15 selectively correspond to the LED chip 12 and being movable to the LED substrate 11, and a reflecting plate 16 surrounding the LED chips 12, wherein an end edge 17 is close to the lens substrate section 14.

Description

  The present invention relates to an LED lighting apparatus using an LED as a light source.

2. Description of the Related Art Conventionally, there has been known an LED lighting apparatus including a substrate on which an LED is disposed and a lens that is disposed on the light source side of the substrate and controls at least two kinds of light distribution (see, for example, Patent Document 1). .
The LED illumination device of Patent Document 1 can switch the light distribution by making the lens movable.

Japanese Patent Laying-Open No. 2004-199891 (FIG. 1, claim 1)

However, the LED lighting apparatus described in Patent Document 1 has a relatively large space between the LED chip on the LED substrate and the lens.
Therefore, the LED lighting apparatus described in Patent Document 1 cannot acquire the targeted light distribution due to light leakage from the light component from the LED chip through the gap.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an LED lighting apparatus that is capable of acquiring a targeted light distribution without light leakage.

  An LED lighting apparatus according to the present invention includes an LED substrate on which an LED chip is mounted, a lens substrate portion, and a plurality of lens portions formed on the lens substrate portion, and at least one of the plurality of lens portions. A lens which is disposed in front of the LED substrate so as to selectively correspond to the LED chip and which is movable with respect to the LED substrate, and surrounds the LED chip, and an edge portion of the lens is the lens. And a reflector close to the substrate portion.

  In the LED lighting apparatus according to the present invention, the lens is rotatable with respect to the LED substrate.

  According to the LED lighting apparatus of the present invention, there is no light leakage, and there is an effect that a targeted light distribution can be acquired.

The side view of the LED lighting fixture of 1st Embodiment which concerns on this invention The bottom view of the LED lighting fixture of 1st Embodiment which concerns on this invention The bottom view of the LED board of the LED lighting fixture of 1st Embodiment which concerns on this invention The side view after the movement of the lens of the LED lighting fixture of 1st Embodiment which concerns on this invention The bottom view after the movement of the lens of the LED lighting fixture of 1st Embodiment which concerns on this invention The side view of LED lighting fixture of 2nd Embodiment which concerns on this invention The bottom view of the LED lighting fixture of 2nd Embodiment which concerns on this invention The bottom view of the LED board of the LED lighting fixture of 2nd Embodiment which concerns on this invention The side view after rotation of the lens of the LED lighting fixture of 2nd Embodiment concerning this invention The bottom view after rotation of the lens of the LED lighting fixture of 2nd Embodiment which concerns on this invention

Hereinafter, LED lighting fixtures according to a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the LED lighting apparatus 10 according to the first embodiment of the present invention includes an LED substrate 11 on which a plurality of LED chips 12 are mounted, a lens substrate portion 14, and a plurality of lens substrate portions 14. And a lens unit that is movably disposed on the LED substrate 11 in front of the LED substrate 11 so that at least one of the plurality of lens units 15 selectively corresponds to the LED chip 12. 13 and a plurality of reflecting plates 16 that surround the LED chip 12 and whose end edge portion 17 is close to the lens substrate portion 14.

  The plurality of LED chips 12 are mounted on the lower surface of the LED substrate 11 formed in a single and square shape. The plurality of LED chips 12 emit light toward the lower side of the LED substrate 11 when a direct current is supplied to a not-shown printed circuit included in the LED substrate 11.

As shown in FIG. 2, the lens 13 is made of a transparent resin, has a lens substrate portion 14 that is formed in a square plate shape and is arranged in parallel with the LED substrate 11. It has a lens portion 15 formed in a hemispherical shape on the lower surface.
A plurality of lens units 15 are arranged in the row and column in FIG. The lens unit 15 is different from the first light distribution lens and the first light distribution lens unit 18 in which a predetermined first light distribution characteristic is set from the leftmost column in FIG. 2 toward the right side. The second light distribution lens portions 19 for which a predetermined second light distribution characteristic is set are sequentially arranged at equal intervals. Adjacent first light distribution lens portions 18 have a spacing dimension L1. The adjacent second light distribution lens portions 19 have the same interval dimension L1 as the adjacent first light distribution lens portions 18.
The lens 13 is connected to a moving mechanism (not shown), and when the moving mechanism is driven, 1 / of the interval dimension L1 between the adjacent first light distribution lens portion 18 and the adjacent second light distribution lens portion 19. The second stroke is moved in parallel to the LED board 11 from the first position A1 to the second position A2 (see FIG. 4).

As shown in FIG. 3, a plurality of LED chips 12 are arranged in rows and columns on the LED substrate 11.
The reflector 16 is formed in a bottomed cylindrical shape that surrounds each of the LED chips 12 independently, and is attached to the LED substrate 11 corresponding to the position of the LED chip 12.
The distance L2 between the adjacent LED chips 12 and the adjacent reflectors 16 is equal to the distance L1 between the adjacent first light distribution lens portion 18 and the adjacent second light distribution lens portion 19.
The reflection plate 16 is arranged such that the end edge portion 17 arranged at the bottom portion is close to the lens substrate portion 14.

Next, optical characteristics of the LED lighting device 10 will be described.
Returning to FIG. 1, when the lens 13 is in the first position A <b> 1, light is emitted from the LED chip 12 by supplying a direct current to the LED substrate 11. At this time, since the lens 13 is in the first position A1, the second light distribution lens portion 19 in which the second light distribution characteristic is set is arranged corresponding to the LED chip 12, and is emitted from the LED chip 12. The emitted light is emitted by being controlled by the second light distribution lens unit 19 by the light distribution by the second light distribution characteristic. Here, since the first light distribution lens unit 18 does not correspond to the LED chip 12, the light distribution from the LED chip 12 is not controlled by the first light distribution characteristic.

As shown in FIGS. 4 and 5, when the moving mechanism is driven, the lens 13 is moved in parallel to the LED substrate 11 from the first position A1 to the second position A2. When the lens 13 reaches the second position A2, the first light distribution lens portion 18 in which the first light distribution characteristic is set is disposed corresponding to the LED chip 12, and the light emitted from the LED chip 12 is transmitted. The light is emitted by being controlled by the first light distribution lens unit 18 according to the light distribution by the first light distribution characteristic. Here, since the second light distribution lens unit 19 does not correspond to the LED chip 12, the light distribution from the LED chip 12 is not controlled by the second light distribution characteristic.
Accordingly, since the reflector 16 surrounds the LED chip 12 and the end edge portion 17 is close to the lens substrate portion 14, no light leakage occurs in the light component of the LED chip 12, and the LED substrate 11 is not leaked. The light distribution aimed by the first light distribution lens portion 18 and the second light distribution lens portion 19 of the lens 13 moved in parallel can be controlled.

  When the moving mechanism is driven in the return direction, the lens 13 is moved back from the second position A2 to the first position A1 in parallel with the LED substrate 11. In order for the lens 13 to return to the first position A1, the second light distribution lens unit 19 in which the second light distribution characteristic is set is disposed corresponding to the LED chip 12, and the light emitted from the LED chip 12 is transmitted. The light is emitted by being controlled by the light distribution by the second light distribution characteristic by the second light distribution lens unit 19.

  As described above, according to the LED lighting apparatus 10 of the first embodiment, the reflecting plate 16 surrounds the LED chip 12 and the end edge portion 17 is brought close to the lens substrate portion 14. Light leakage does not occur in the light component, and the targeted light distribution can be controlled by the first light distribution lens portion 18 and the second light distribution lens portion 19 of the lens 13 moved in parallel with the LED substrate 11.

(Second Embodiment)
Next, the LED lighting fixture of 2nd Embodiment which concerns on this invention is demonstrated.
Note that, in the following second embodiment, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, or the description is simplified. Omitted.

  As shown in FIG. 6, the LED lighting apparatus 20 according to the second embodiment of the present invention includes a single LED substrate 21 formed in a circular shape, a lens substrate portion 23 formed in a circular plate shape, and a hemispherical shape. And a lens 22 having a lens portion 24.

As shown in FIG. 7, the lens 22 is determined in advance so that the first light distribution characteristic is different from the first light distribution lens unit 25 in which the predetermined first light distribution characteristic is set in the lens unit 24. Further, the second light distribution lens portions 26 for which the second light distribution characteristics are set are sequentially arranged at equal intervals in the circumferential direction. The adjacent first light distribution lens portions 25 have a circumferential interval angle θ 1, and the adjacent second light distribution lens portions 26 have the same circumferential angle θ 1 as the adjacent first light distribution lens portions 25. Have
The lens 22 is rotated in parallel with the LED substrate 21 from the first position B1 to the second position B2 by a rotation mechanism (not shown) (see FIG. 10).

  As shown in FIG. 8, the circumferential angle θ2 between the adjacent LED chips 12 and the adjacent reflectors 16 mounted on the lower surface of the LED substrate 21 is equal to the adjacent first light distribution lens unit 25 and the adjacent one. This coincides with the circumferential angle θ1 of the matching second light distribution lens portion 26.

  The LED illumination device 20 emits light from the LED chip 12 by supplying a direct current to the LED substrate 21 when the lens 22 is in the first position B1. At this time, since the lens 22 is in the first position B1, the second light distribution lens portion 26 in which the second light distribution characteristic is set is disposed corresponding to the LED chip 12, and is emitted from the LED chip 12. The emitted light is controlled by the second light distribution lens unit 26 according to the light distribution by the second light distribution characteristic and emitted.

  As shown in FIGS. 9 and 10, when the rotation mechanism is driven, the lens 22 moves from the first position B1 to the second position B2 at an angle θ3 corresponding to ½ of the interval angle θ1 and the interval angle θ2. Thus, the LED board 21 is rotated in the clockwise direction. When the lens 22 reaches the second position B2, the first light distribution lens unit 25 in which the first light distribution characteristic is set is arranged corresponding to the LED chip 12, and the light emitted from the LED chip 12 is transmitted. The first light distribution lens unit 25 emits light that is controlled by light distribution based on the first light distribution characteristic.

  The rotation mechanism is driven in the return direction, or the lens 22 is further rotated in the clockwise direction with respect to the LED substrate 21 at the angle θ3 from the second position B2, so that the lens 22 is in the first position B1. Therefore, the second light distribution lens part 26 in which the second light distribution characteristic is set is disposed corresponding to the LED chip 12, and the light emitted from the LED chip 12 is the second light distribution. The light is controlled and emitted by the light distribution by the second light distribution characteristic by the lens unit 26.

  As described above, according to the LED lighting apparatus 20 of the second embodiment, since the lens 22 is rotated with respect to the LED substrate 21, the LED chips are linearly arranged and the lens is moved linearly. Compared to the case, soft and variable light distribution can be controlled.

  In addition, the LED lighting fixture of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 10,20 LED lighting fixture 11,21 LED board 12 LED chip 13,22 Lens 14,23 Lens substrate part 15,24 Lens part 16 Reflecting plate 17 Edge part

Claims (2)

An LED substrate on which the LED chip is mounted;
A front side of the LED substrate, the lens unit having a lens substrate unit and a plurality of lens units formed on the lens substrate unit, wherein at least one of the plurality of lens units selectively corresponds to the LED chip. And a lens that is movable with respect to the LED substrate;
An LED lighting apparatus comprising: a reflector that surrounds the LED chip and has an edge portion close to the lens substrate portion. In the LED lighting fixture of Claim 1,
An LED lighting apparatus in which the lens is rotatable with respect to the LED substrate.

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