JP5820967B2 - LED lighting fixtures - Google Patents

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 can improve efficiency by causing light to enter only a selected lens without light leakage. It is in.

An LED lighting apparatus according to the present invention includes an LED substrate on which a plurality of LED chips are mounted, and a plurality of lens portions provided on the lens substrate portion, wherein the plurality of lens portions have a first light distribution characteristic. A first type of lens unit and a second type of lens unit having a second light distribution characteristic different from the first light distribution characteristic, and disposed in front of the LED substrate, The LED substrate is movable, and by the movement, either the first type lens unit or the second type lens unit of the plurality of lens units is formed on the plurality of LED chips. A lens selectively corresponding to each, a lens disposed between the lens and the LED substrate, made of a material that blocks light, and having a plurality of through holes or a light guide member, light guide member, the LED board Space towards the through the space formed by the spacing between the LED substrate, wherein arranged in a plurality of LED chips each corresponding to the position of, the said direct light from each LED chip, caused by the distance between the LED substrate The light is concentrated on the through hole or the light guide member at a position corresponding to each LED chip, and the direct light enters the lens portion at a position not corresponding to each LED chip. A mask plate that blocks light and does not change relative positional relationship with the LED substrate regardless of movement of the lens .

The LED lighting apparatus according to the present invention, the lens unit of the first type of lens portion or the second type is selected, the mask plate is immovably fixed to the LED board.

  According to the LED lighting apparatus of the present invention, there is no light leakage, and there is an effect that the light can be incident only on the selected lens and the efficiency can be improved.

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 mask 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 mask board of 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 which concerns on 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 mask plate 16 for blocking irradiation light from a portion excluding the lens portion 15 selectively corresponding to the LED chip 12 between the lens 13 and the LED substrate 11.

  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 characteristic and the first light distribution lens unit 17 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 18 having predetermined second light distribution characteristics are sequentially arranged at equal intervals. Adjacent first light distribution lens portions 17 have a distance dimension L1. The adjacent second light distribution lens portions 18 have the same interval dimension L1 as the adjacent first light distribution lens portions 17.
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 17 and the adjacent second light distribution lens portion 18. 2 is moved in parallel with respect to the LED substrate 11 and the mask plate 16 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 mask plate 16 is formed in the same square as the LED substrate 11 by a simple metal plate member, a resin plate member, or the like, and is attached to the LED substrate 11 in the same phase. The mask plate 16 has a plurality of through-holes 20 formed in a main body 19 that is not translucent and has a shielding function. The through hole 20 is formed at the same position as the LED chip 12. The distance L2 between the adjacent through holes 20 and the adjacent LED chips 12 is equal to the distance L1 between the adjacent first light distribution lens portion 17 and the adjacent second light distribution lens portion 18.
Accordingly, since the mask plate 16 is fixed so as not to move with respect to the LED substrate 11, a phase shift between the LED chip 12 mounted on the LED substrate 11 and the mask plate 16 can be prevented.
Note that a light guide member can be applied to the through hole 20 instead of the opening.

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 at the first position A1, the second light distribution lens portion 18 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 controlled by the second light distribution lens unit 18 through the through hole 20 of the mask plate 16 and emitted by being controlled by the light distribution by the second light distribution characteristic. Here, since the first light distribution lens unit 17 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.
Since the LED chip 12 is a light source with high light directivity, high luminance, and low solid angle due to its structure, the LED chip 12 emits strong and thin light. Therefore, the light component from the LED chip 12 is a single light component. The light is incident only on the through-holes 20 to irradiate the second light distribution lens unit 18 and not the unselected first light distribution lens unit 17. At this time, even if the through hole 20 of the mask plate 16 is arranged through the space in the irradiation direction of the LED chip 12, direct light from the LED chip 12 is concentrated and incident on the through hole 20, The light leakage associated with the space is negligibly small.

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 unit 17 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 light is controlled and emitted by the first light distribution lens unit 17 through the through hole 20 of the mask plate 16 by the light distribution by the first light distribution characteristic. Here, since the second 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 second light distribution characteristic.
Accordingly, the light component from the LED chip 12 is irradiated only to the first light distribution lens portion 17 or the second light distribution lens portion 18 in the lens portion 15 that is selectively associated with the through hole 20 of the mask plate 16. In addition, there is no light leakage, and the light component can be incident only on the selected first light distribution lens portion 17 or second light distribution lens portion 18 to improve efficiency.

  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 portion 18 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 controlled and emitted by the second light distribution lens unit 18 through the through hole 20 of the mask plate 16 by the light distribution by the second light distribution characteristic.

  As described above, according to the LED lighting apparatus 10 of the first embodiment, the first light distribution in the lens unit 15 in which the light component from the LED chip 12 is selectively dealt with by the through hole 20 of the mask plate 16. Since only the lens unit 17 or the second light distribution lens unit 18 is irradiated, there is no light leakage, and the light component is incident only on the selected first light distribution lens unit 17 or the second light distribution lens unit 18. Efficiency. Moreover, according to the LED lighting fixture 10 of 1st Embodiment, control of the variable light distribution by a several light distribution characteristic can be performed.

  According to the LED lighting apparatus 10 of the first embodiment, since the mask plate 16 is fixed to the LED substrate 11 so as not to move, the LED chip 12 mounted on the LED substrate 11 and the through hole 20 of the mask plate 16. It is possible to prevent a phase error between the two.

(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 30 of the second embodiment according to the present invention includes a single LED substrate 31 formed in a circular shape, a lens substrate portion 33 formed in a circular plate shape, and a hemispherical shape. Are formed in the same position as the LED chip 12 on a main body 36 that has the same shape as the LED substrate 31 and is attached to the LED substrate 31 in the same phase and has no light transmission and has a shielding function. And a mask plate 35 having a plurality of through holes 37.

As shown in FIG. 7, the lens 32 is determined in advance so that the first light distribution characteristic is different from the first light distribution lens unit 38 in which the predetermined first light distribution characteristic is set in the lens unit 34. The second light distribution lens portions 39 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 38 have a circumferential interval angle θ 1, and the adjacent second light distribution lens portions 39 have the same circumferential angle θ 1 as the adjacent first light distribution lens portions 38. Have
The lens 32 is rotated in parallel with the LED substrate 31 and the mask plate 35 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 chip 12 mounted on the lower surface of the LED substrate 31 and the adjacent through hole 37 is equal to the adjacent first light distribution lens portion 38 and the adjacent one. This coincides with the circumferential angle θ1 of the matching second light distribution lens portion 39.

  The LED illumination device 30 emits light from the LED chip 12 by supplying a direct current to the LED substrate 31 when the lens 32 is in the first position B1. At this time, since the lens 32 is in the first position B1, the second light distribution lens unit 39 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 39 through the through hole 37 of the mask plate 35 and is emitted by being controlled by the light distribution by the second light distribution characteristic.

  As shown in FIGS. 9 and 10, when the rotation mechanism is driven, the lens 32 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 31 and the mask plate 35 are rotated in the clockwise direction. When the lens 32 reaches the second position B2, the first light distribution lens unit 38 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 controlled and emitted by the first light distribution lens unit 38 through the through hole 37 of the mask plate 35 with the light distribution by the first light distribution characteristic.

  The rotation mechanism is driven in the return direction, or the lens 32 is further rotated in the clockwise direction with respect to the LED substrate 31 and the mask plate 35 at the angle θ3 from the second position B2, whereby the lens 32 is moved. Since the second light distribution lens unit 39 in which the second light distribution characteristic is set is disposed corresponding to the LED chip 12 in order to be arranged in the same phase as the first position B1, the light emitted from the LED chip 12 is The light is controlled and emitted by the second light distribution lens unit 39 through the through hole 37 of the mask plate 35 by the light distribution by the second light distribution characteristic.

  According to the LED lighting apparatus 30 of the second embodiment, since the lens 32 is rotated with respect to the LED substrate 31, it is softer than the case where the LED chips are linearly arranged and the lens is moved linearly. 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 10,30 LED lighting fixture 11,31 LED board 12 LED chip 13,32 Lens 14,33 Lens board part 15,34 Lens part 16,35 Mask board

Claims (2)

An LED substrate on which a plurality of LED chips are mounted;
A plurality of lens units provided on the lens substrate unit, wherein the plurality of lens units are a first type of lens unit having a first light distribution characteristic and a second different from the first light distribution characteristic; A second type of lens unit having a light distribution characteristic, disposed in front of the LED substrate, and movable with respect to the LED substrate. By the movement, the plurality of lens units A lens in which either the first type lens unit or the second type lens unit selectively corresponds to each of the plurality of LED chips;
It is arranged between the lens and the LED substrate and is made of a material that blocks light, and has a plurality of through holes or a light guide member, and the plurality of through holes or the light guide member are arranged in front of the LED substrate. The LED light is disposed at a position corresponding to each of the plurality of LED chips via a space generated by the distance from the LED substrate, and direct light from each LED chip is transmitted through the space generated by the distance from the LED substrate. The light entering the through-holes or the light guide member at positions corresponding to the LED chips intensively and the direct light entering the lens portions at positions not corresponding to the LED chips. A mask plate that blocks the relative positional relationship with the LED substrate regardless of the movement of the lens ,
LED luminaire comprising: In the LED lighting fixture of Claim 1,
When the first type lens unit or the second type lens unit is selected, the LED lighting device is configured such that the mask plate is immovably fixed with respect to the LED substrate.

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