JP5366306B2 - LED unit and lighting apparatus - Google Patents

Description

  The present invention relates to a luminaire used for a downlight that is embedded in a ceiling surface of a house or the like and illuminates a corridor, a wall, or the like, and more particularly to a built-in LED unit and luminaire.

  As an example of a conventional LED unit and lighting fixture, an LED unit that reduces glare by setting a light shielding angle without using a louver by adjusting the resin surface depth of a phosphor layer covering an LED light source And a lighting fixture (see, for example, Patent Document 1).

JP 2008-166185 A (FIG. 1, claim 1)

In general, it is known to use a glare cut plate in a lighting fixture in order to reduce glare, which is a phenomenon that is difficult to see due to excessive glare. Such a glare cut plate is provided in the irradiation direction from the end face of the instrument, so that the light flying in the set glare cut angle direction is blocked by the glare cut plate to reduce the glare.
However, the luminaire becomes larger by the size of the glare cut plate, and it is difficult to reduce the size of the luminaire.

On the other hand, in order to reduce glare, there is one in which the light source is located in the back of the lighting fixture. In such a lighting fixture, glare is reduced by blocking light flying in the direction of the glare cut angle in the main body.
However, an unnecessary space is generated in the lighting fixture, and it is difficult to downsize the lighting fixture.

The conventional LED unit and lighting fixture disclosed in Patent Document 1 have been proposed in order to solve the above problems.
However, the structure is complicated because it requires a phosphor layer or reflector that is formed into a cap shape by dispersing, for example, a green phosphor, a yellow phosphor, or a red phosphor in a translucent silicon resin. Therefore, it has a new problem that it is not suitable for mass production.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a lighting apparatus capable of reducing glare and reducing the size with a simple structure.

LED unit according to the present invention is a LED unit comprising a LED substrate having the LED chip and the LED package of the L ED light source, and a optical member for controlling light from the LED light source, The optical member is formed by opening a first surface which is a surface facing the LED substrate in the optical member, an LED package housing recess for housing the LED package, and the LED substrate in the optical member. A light exit recess that is a recess that emits light and is formed by opening a second surface that is parallel to the mounting surface of the LED substrate on the opposite side, the LED package housing recess, and the light exit recess provided between, having a first convex curved surface of the LED substrate side, and a convex curved lens section having a second convex curved surface opposite to the LED substrate, before The side surface of the LED package housing recess is perpendicular to the mounting surface of the LED substrate and contacts the surface of the second convex curved surface passing through the boundary between the second surface and the light emitting recess in the optical member. The tangent has a contact at a position near the periphery of the convex curved lens portion, the angle formed by the tangent with the second surface is larger than the glare cut angle, and the second convex curved surface of the convex curved lens portion. Is formed so that the curvature in the vicinity of the periphery is smaller than the central portion thereof, is reflected by the side surface of the LED package housing concave portion and is incident on the convex curved lens portion, and the exit concave portion from the convex curved lens portion. The light emitted inside is incident on the second surface side portion of the optical member from the exit recess without being emitted to the outside from the exit recess, and then from the second surface of the optical member. Emitted to the outside It is characterized in that.

In the present invention, the optical member has a contact point at a position near the periphery of the convex curved lens portion where the tangent line drawn from the boundary between the flat surface portion on the outer side and the concave portion to the convex curved lens portion.
Thereby, the angle formed by the tangent line drawn from the boundary between the outer flat surface portion and the concave portion to the convex curved lens portion and the outer flat surface portion can be increased to increase the glare cut angle.
Therefore, glare can be reduced with a simple structure.

In the present invention, the adjustment of the angle formed between the tangent line drawn from the boundary between the outer flat surface portion and the concave portion to the convex curved lens portion and the outer flat surface portion is performed using a glare cut plate like the conventional one. Compared to instrument dimensions, there is less impact.
Thereby, the outer diameter of the optical member can be made significantly smaller than the glare cut plate.
Therefore, the size can be reduced.

In the present invention, the contact point when the tangent line is drawn to the convex curved lens portion from the boundary between the outer flat surface portion and the concave portion is far from the outer flat surface portion.
Thereby, the angle formed by the tangent line drawn from the boundary between the outer flat surface portion and the concave portion to the convex curved lens portion and the outer flat surface portion can be increased.
Therefore, glare can be reduced and the size can be reduced with a simple structure.

  The lighting fixture which concerns on this invention was equipped with the LED unit of the said structure.

In the present invention, an LED unit to which an optical member having a contact point at a position in the vicinity of the periphery of the convex curved lens portion is provided.
Thereby, the angle formed by the tangent line drawn from the boundary between the outer flat surface portion and the concave portion to the convex curved lens portion and the outer flat surface portion can be increased to increase the glare cut angle.
Therefore, it is possible to provide a lighting fixture that can reduce glare and reduce the size with a simple structure.

According to the LED unit and the lighting apparatus of the present invention, the optical member for controlling the light from the LED light source is formed in the outer flat surface portion, the recess formed in the region extending from the LED light source, and the recess. And a tangent line drawn from the boundary between the flat surface portion on the outer side and the concave portion to the convex curved lens portion has a contact at a position near the periphery of the convex curved lens portion.
As a result, the glare can be reduced and the size can be reduced with a simple structure.

The vertical sectional view of the lighting fixture which applied the LED unit of a 1st embodiment concerning the present invention Vertical sectional view of the LED unit shown in FIG. The vertical sectional view of the LED unit in the lighting fixture of 2nd Embodiment concerning this invention The vertical sectional view of the LED unit in the lighting fixture of 3rd Embodiment concerning this invention The vertical sectional view of the LED unit in the lighting fixture of 4th Embodiment concerning this invention

  Hereinafter, LED units and 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, a lighting fixture 100 equipped with the LED unit 10 according to the first embodiment of the present invention has a fixture main body 101 that is a cylindrical casing and a plurality of LED units 10, and the fixture main body 101. The lamp unit 102, the power supply unit 103, and the power supply terminal block 104 are installed in the mounting hole 2 formed in the ceiling surface 1 of a house or the like.

  The instrument body 101 is formed by press-molding a metal plate member or molding it using a hard resin material. The instrument main body 101 includes a partition plate 105, an upper peripheral plate 106 at the top of the partition plate 105, and a lower peripheral plate 107 at the bottom of the partition plate 105.

  The partition plate 105 is disposed at the center of the instrument main body 101. The partition plate 105 has a wiring hole 109 through which the instrument wiring 108 for supplying power from the power supply unit 103 to the lamp unit 102 is inserted.

  The upper peripheral plate 106 has a bracket 110 fixed to the upper end thereof with screws 111, and a power terminal block 104 is fixed to the bracket 110 outside the instrument body 101. The power supply terminal block 104 electrically connects a commercial power supplied from the outside to the power supply unit 103. The power supply unit 103 converts the commercial power supply into a DC power supply for the LED unit 10.

  A flange 112 is formed at the lower end of the lower peripheral plate 107. The flange 112 contacts the ceiling surface 1 to position the instrument body 101 on the ceiling surface 1.

  A plurality of mounting springs 113 are provided on the side of the lower peripheral plate 107. The attachment spring 113 is screwed to the ceiling surface 1.

  The LED unit 10 includes a base 11, a heat radiating member 12, an LED package 13 on which an LED chip 14 as an LED light source is mounted, and an LED substrate 15 on which a wiring pattern (not shown) on which a plurality of LED packages 13 are mounted is provided. The optical member 16 disposed on the optical axis of the LED chip 14 and the frame member 17 are provided.

  The base 11 is formed in a disk shape using a metal material such as ADC, and a cylindrical package base 18 is formed in a protruding manner at a position corresponding to the LED package 13.

  The heat dissipating member 12 functions as a heat sink and is formed in a plate shape having a plurality of protrusions using silicon as a material so as to have a large heat dissipating area. The heat dissipation member 12 is disposed between the base 11 and the LED substrate 15.

  In the LED package 13, one LED chip 14 is mounted at the center position of the LED substrate 15, and five LED chips 14 are mounted around the LED package 13.

  The optical member 16 is molded from a polycarbonate, which is a transparent light transmissive member. The optical member 16 is assembled in contact with the base 11.

  The frame member 17 is formed using a mechanical structural steel material such as SPCD as a raw material, and accommodates the base 11, the heat radiating member 12, the LED package 13, the LED substrate 15, and the optical member 16, and an instrument body. 101 is attached to the partition plate 105.

  As shown in FIG. 2, the optical member 16 includes a central projecting portion 19 and a flat plate portion 20 having a flat surface portion 21 on the outer side and disposed at the bottom of the projecting portion 19.

  The optical member 16 has a projecting portion 19 formed in a substantially hemispherical shape. In the center portion, the light source housing portion 22 that is a concave light source housing portion from the top to the lower side in FIG. A concave exit recess 23 is formed upward in FIG. A convex curved lens portion 24 is formed between the LED package housing recess 22 and the exit recess 23. The LED package housing recess 22 and the exit recess 23 have the same inner diameter D1.

  The optical member 16 has the LED substrate 15 assembled on the protrusion 19 so that the LED chip 14 of the LED package 13 is accommodated in the LED package accommodating recess 22.

  The optical member 16 is arranged so that the convex curved lens portion 24 is positioned closer to the LED package 13 so that the depth dimension of the emission recess 23 is larger than the depth dimension of the LED package housing recess 22.

  In the optical member 16, a tangent line B drawn from the boundary point A between the flat surface portion 21 on the outer shell side and the exit concave portion 23 to the convex curved lens portion 24 is set at a position near the periphery of the convex curved lens portion 24. The contact C is set far from the flat surface portion 21 on the outer side.

  In the optical member 16, the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 24 and the outer flat surface portion 21 causes glare. It is set to be larger than an angle α formed by a tangent line D drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 24 and the outer flat surface portion 21.

  Next, optical characteristics of the LED unit 10 will be described.

  The power supply unit 103 converts commercial power into DC power and supplies power to the LED unit 10, thereby emitting light from the LED chip 14.

The emitted light is diffused with a certain extent. Of the emitted light, glare creation light γ that creates glare is reflected by the LED package housing recess 22 and is incident on the convex curved lens portion 24, and is emitted from the convex curved lens portion 24 into the exit concave portion 23. At this time, the glare generating light γ is not emitted from the exit recess 23 to the outside, but is incident from the exit recess 23 into the flat plate portion 20, and then exits from the outer flat surface portion 21.
As a result, the glare creation light γ is optically attenuated and does not create unpleasant glare.

In the LED unit 10 of the first embodiment, the optical member 16 has a tangent line B drawn from the boundary point A between the flat surface portion 21 on the outer side and the exit concave portion 23 to the convex curved lens portion 24 in the vicinity of the periphery of the convex curved lens portion 24. Has a contact C at the position.
As a result, the optical member 16 increases the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the output concave portion 23 to the convex curved lens portion 24 and the outer flat surface portion 21. The glare cut angle can be set large.
Therefore, glare can be reduced with a simple structure.

In the LED unit 10 of the first embodiment, the adjustment of the angle formed between the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 24 and the outer flat surface portion 21 is performed. As compared with the case of using a glare cut plate like the conventional one, the influence on the instrument size is small.
Thereby, the outer diameter of the optical member 16 can be made significantly smaller than the glare cut plate.
Therefore, the size can be reduced.

In the luminaire 100 of the first embodiment, a tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 24 is located at a position near the periphery of the convex curved lens portion 24. The LED unit 10 to which the optical member 16 having the above is applied is provided.
As a result, the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 24 and the outer flat surface portion 21 is increased to increase the glare cut angle. Can be set.
Therefore, it is possible to provide the lighting fixture 10 that can reduce glare and reduce the size with a simple structure.

(Second Embodiment)
Next, the LED unit and lighting fixture of 2nd Embodiment of this invention are demonstrated. In the following embodiments, components that are the same as those in the first embodiment described above or functionally similar components are simplified or omitted by giving the same reference numerals or equivalent symbols in the drawings. To do.

  As shown in FIG. 3, the LED unit 30 mounted on the lighting fixture 120 according to the second embodiment of the present invention has an optical member 31 having a convex curved lens portion 32 in which the curvature in the vicinity of the periphery is set smaller than the central portion. Applied.

In the optical member 31, a contact point C of the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 32 is set far from the outer flat surface portion 21.
Thereby, the optical member 31 increases the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 32 and the outer flat surface portion 21. Can do.

  The LED unit 30 and the lighting fixture 120 of 2nd Embodiment have the same effect as 1st Embodiment.

(Third embodiment)
Next, the LED unit and lighting fixture of 3rd Embodiment of this invention are demonstrated.

  As shown in FIG. 4, the LED unit 40 mounted on the luminaire 130 of the third embodiment of the present invention has a convex curved lens portion 42 that is set with the flat surface portion 21 on the outer side away from the LED package 13 side. The optical member 41 was applied.

The optical member 41 has a contact point C of a tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 32 by moving the outer flat surface portion 21 away from the LED package 13 side. Is set far from the flat surface portion 21 on the outer side.
As a result, the optical member 41 increases the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the exit concave portion 23 to the convex curved lens portion 32 and the outer flat surface portion 21. Can do.

  The LED unit 40 and the lighting fixture 130 of 3rd Embodiment have the same effect as 1st Embodiment.

(Fourth embodiment)
Next, the LED unit and lighting fixture of 4th Embodiment of this invention are demonstrated.

  As shown in FIG. 5, the LED unit 50 mounted on the lighting fixture 140 of the fourth embodiment of the present invention includes an LED package housing recess 52 and an exit recess 53 having an inner diameter D2 that is smaller than that of the first embodiment. An optical member 51 having the above was applied.

The optical member 51 has the LED package housing recess 52 and the exit recess 53 having a small inner diameter D2 and is pulled from the boundary point A between the outer flat surface portion 21 and the exit recess 53 to the convex curved lens portion 32. The contact C of the tangent line B is set far from the flat surface portion 21 on the outer side.
Thus, the optical member 41 increases the angle β formed by the tangent line B drawn from the boundary point A between the outer flat surface portion 21 and the output concave portion 53 to the convex curved lens portion 32 and the outer flat surface portion 21. Can do.

  The LED unit 50 and the lighting fixture 140 of 4th Embodiment have the same effect as 1st Embodiment.

  The LED package 13 and the LED substrate 15 used in each of the embodiments are not limited to those illustrated, and can be changed as appropriate.

100, 120, 130, 140 Lighting fixture 10, 30, 40, 50 LED unit 14 LED chip (LED light source)
16, 31, 41, 51 Optical member 21 Flat surface portion on outer side 23, 53 Output recess (recess)
24, 32, 42 Convex-curved lens section

Claims (2)

An LED substrate having the LED chip and the LED package of the L ED light source,
An optical member for controlling light from the LED light source;
An LED unit comprising:
The optical member is
An LED package housing recess for housing the LED package, formed by opening a first surface which is a surface facing the LED substrate in the optical member;
A light exit recess that is a recess from which light is emitted, formed by opening a second surface that is a surface parallel to the mounting surface of the LED substrate on the side opposite to the LED substrate in the optical member ;
A convex curved lens part provided between the LED package housing concave part and the light emitting concave part, and having a first convex curved surface on the LED substrate side and a second convex curved surface on the side opposite to the LED substrate. When,
Have
The side surface of the LED package housing recess is perpendicular to the mounting surface of the LED substrate,
A tangent line that touches the surface of the second convex curved surface passing through the boundary between the second surface and the light exit concave portion of the optical member has a contact point at a position near the periphery of the convex curved lens unit, and the tangent line is The angle formed with the second surface is larger than the glare cut angle,
And the second convex curved surface of the convex curved lens part is formed so that the curvature in the vicinity of the periphery is smaller than the central part thereof,
The light that is reflected from the side surface of the LED package housing recess and is incident on the convex curved lens portion and is emitted from the convex curved lens portion into the output concave portion is not emitted to the outside from the output concave portion, but the output concave portion. Is incident on the second surface side portion of the optical member, and then is emitted from the second surface of the optical member to the outside.
An LED unit characterized by that. A lighting fixture comprising the LED unit according to claim 1 .

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