JP6433683B2 - Light emitting diode unit and LED lighting device using the same - Google Patents

Description

  The present invention is a light emitting diode unit comprising a light emitting diode element, a condensing lens for condensing the light of the light emitting diode element, and a substrate on which the light emitting diode element is disposed, and in particular, a high illuminance, metal halide lamp, mercury lamp The present invention relates to a light-emitting diode unit used in an LED illumination device such as a street light or a projector, or a general LED illumination device for indoor use as an alternative illumination such as an HF tube.

Conventionally, as a light emitting diode unit, a light emitting unit including a light emitting diode, a lens, and a substrate is known (for example, Patent Document 1).
An example of such a conventional light emitting unit is a light emitting unit 500 as shown in FIG.
The conventional light emitting unit 500 includes a light emitting diode 510, a lens 520 that collects light from the light emitting diode 510, and a substrate 530 on which the light emitting diode 510 is disposed.

JP 2010-123458 A (refer to FIG. 2 in particular)

However, since the conventional light emitting unit 500 described above simply has a structure in which the lens 520 is disposed on the light distribution side of the light emitting diode 510, about 30% of the light from the light emitting diode 510 is light distribution +90 degrees direction and light distribution − There is a problem that it is difficult to obtain sufficient illuminance because it is lost as it is as scattered light in the 90-degree direction (a loss that reduces the light emission efficiency as a light source).
In the present specification, 0 degrees as a reference of the light distribution is directly in front of the light emitting diode element.
Further, the light distribution +90 degree direction and the light distribution -90 degree direction are directions inclined by respective angles from the reference 0 degree to the lateral direction, and +-may be determined in an arbitrary direction.

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to significantly reduce the loss of scattered light in the light distribution +90 degree direction and the light distribution -90 degree direction. Reduces the luminous efficiency to achieve both energy saving effect and high cost performance, and adjusts the beam angle of the light source using a lens spacer that is relatively movable with respect to the substrate on which the light emitting diode element is disposed, thereby irradiating range It is providing the light emitting diode unit which adjusts, and the LED lighting apparatus using the same.

  The invention according to claim 1 is provided between a light emitting diode element, a condensing lens for condensing the light of the light emitting diode element, a substrate on which the light emitting diode element is disposed, and the condensing lens and the substrate. A light emitting diode unit including a lens spacer, a pressing plate that presses the lens spacer against the substrate side, and an adjustment screw that holds the pressing plate to the substrate. The lens spacer includes a plurality of light emitting diode elements respectively. A diode housing hole is formed, and a peripheral wall of the diode housing hole is formed in a tapered shape gradually expanding from the substrate side toward the condenser lens side, and scattered light of the light emitting diode element is directed to the condenser lens side. Mirror-finished so as to reflect toward the substrate, so that the presser plate and the lens spacer are movable relative to the substrate. By having provided on the substrate extending direction of the serial substrate through said adjusting screw elongated screw holes, respectively, it is to solve the aforementioned problems.

  In the invention according to claim 2, in addition to the structure of the light emitting diode unit according to claim 1, the lens spacer is formed of a material that does not transmit light of the light emitting diode element. The problem is further solved.

  In the invention according to claim 3, in addition to the configuration of the light emitting diode unit according to claim 1 or 2, the pressing plate has a lens collar portion formed on an outer peripheral edge of the condenser lens. By having the lens insertion hole provided so as to be pressed against the spacer, the above-described problem is further solved.

  In the invention according to claim 4, in addition to the configuration of the light emitting diode unit according to any one of claims 1 to 3, a lens collar portion disposed on an outer periphery of the condenser lens includes: The above-described problem is further solved by being seated in the collar holding recess disposed at the upper end of the peripheral wall of the diode housing hole.

  In the invention according to claim 5, in addition to the structure of the light emitting diode unit according to any one of claims 1 to 4, the peripheral wall of the diode accommodation hole is separated from the light emitting diode element. In addition to being provided, the lens spacer is provided so as to be displaceable in the substrate extending direction with respect to the light emitting diode element, thereby further solving the above-described problems.

  An LED lighting device according to a sixth aspect of the present invention is a case housing that houses the light emitting diode unit according to any one of the first to fifth aspects, and a transparent disposed on the front surface of the case housing. By providing the resin cover and the light emitting diode unit arranged inside the case housing, the above-described problems are further solved.

  The light-emitting diode unit of the present invention includes a light-emitting diode element, a condensing lens that condenses the light of the light-emitting diode element, a substrate on which the light-emitting diode element is disposed, and a condensing lens and a substrate. By providing a lens spacer, a pressing plate that presses the lens spacer against the substrate side, and an adjustment screw that holds the pressing plate to the substrate, the light emitted from the light emitting diode element is condensed and irradiated. In addition, the following unique effects can be achieved.

According to the light emitting diode unit of the first aspect of the present invention, the lens spacer has a plurality of diode housing holes each housing the light emitting diode element, and the peripheral wall of the diode housing hole extends from the substrate side to the condenser lens side. It is formed in a tapered shape that gradually expands toward the surface and is mirror-finished so as to reflect the scattered light of the light emitting diode element toward the condenser lens side, so that the periphery of the light emitting diode element is a peripheral wall of the diode housing hole. The scattered light in the light distribution +90 degrees direction and the light distribution -90 degrees direction is almost leaked and reflected toward the condenser lens side, so that the light distribution +90 degrees direction and the light distribution -90 degrees direction is scattered. It is possible to remarkably reduce the loss of light and increase the light emission efficiency to achieve both energy saving effect and high cost performance.
In addition, since the distance from the light emitting diode element to the condensing lens can be adjusted, the irradiation range can be adjusted by adjusting the beam angle (condensing condition) of the light source.
Furthermore, the presser plate and the lens spacer are each provided with a long screw hole that is provided in the substrate extending direction of the substrate so as to be movable relative to the substrate and through which the adjustment screw is passed. Since the plate and the lens spacer are relatively movable with respect to the substrate, the irradiation range can be adjusted by adjusting the beam angle (condensing condition) of the light source.

  According to the light emitting diode unit of the invention of claim 2, in addition to the effect of the invention of claim 1, the lens spacer is formed of a material that does not transmit the light of the light emitting diode element. Since the light of the light emitting diode element is reflected by the peripheral wall of the accommodation hole, the leakage of scattered light can be completely prevented.

  According to the light emitting diode unit of the invention according to claim 3, in addition to the effect produced by the invention according to claim 1 or 2, the presser plate has the lens insertion hole, so that the presser plate is gathered. The lens collar formed on the outer peripheral edge of the optical lens can be pressed against the lens spacer.

  According to the light emitting diode unit of the invention of claim 4, in addition to the effect produced by the invention of any one of claims 1 to 3, the lens collar portion disposed on the outer periphery of the condenser lens However, since the lens spacer is also a pedestal of the condensing lens by being seated in the collar holding recess provided at the upper end of the peripheral wall of the diode housing hole, the condensing lens can be accurately positioned.

  According to the light emitting diode unit of the invention according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, the peripheral wall of the diode housing hole is separated from the light emitting diode element. And the lens spacer is provided so as to be displaceable in the substrate extending direction with respect to the light emitting diode element, so that the center of the condensing lens and the center of the light emitting diode element can be aligned, shifted, or adjustable. Therefore, the light irradiation direction can be adjusted without changing the direction of the light emitting diode element and the condenser lens.

  An LED lighting device according to a sixth aspect of the present invention is a case housing that houses the light emitting diode unit according to any one of the first to fifth aspects, and a transparent disposed on the front surface of the case housing. By including the resin cover and the light emitting diode units arranged inside the case housing, the periphery of the light emitting diode element is surrounded by the peripheral wall of the diode housing hole, and the light distribution is in the +90 degree direction and the light distribution is at -90 degrees. Because there is almost no leakage of scattered light in the direction and the light is reflected toward the condenser lens side, the loss of scattered light in the direction of light distribution +90 degrees and light distribution -90 degrees is remarkably reduced to increase luminous efficiency and save energy The beam angle of the light source is adjusted because the center of the condenser lens and the center of the light-emitting diode element can be aligned and shifted, and can be adjusted. Irradiation range Te can be adjusted.

The perspective view which shows the outline of the LED illuminating device provided with the light emitting diode unit which is an Example of this invention. The disassembled perspective view of the light emitting diode unit which is an Example of this invention. 1 is a side sectional view schematically showing a light emitting diode unit that is an embodiment of the present invention. (A) (B) is a conceptual diagram which shows when the center of the light emitting diode element of a light emitting diode unit and the center of a condensing lens are shifted. The sectional side view which shows the outline of the light emitting diode unit of a prior art.

  The light-emitting diode unit of the present invention and the LED lighting device using the same include a light-emitting diode element, a condensing lens that condenses light of the light-emitting diode element, a substrate on which the light-emitting diode element is disposed, the condensing lens, and a substrate A lens spacer, a pressing plate that presses the lens spacer against the substrate side, and an adjustment screw that holds the pressing plate to the substrate. The lens spacer stores a plurality of diodes that each store a light-emitting diode element. And a peripheral wall of the diode housing hole is formed in a tapered shape that gradually expands from the substrate side toward the condenser lens side, and reflects scattered light of the light emitting diode element toward the condenser lens side. Mirror surface finish so that the presser plate and lens spacer are movable relative to the substrate. Elongated screw holes are provided in the plate extension direction to pass through the adjustment screws, respectively, and the loss of scattered light in the direction of light distribution +90 degrees and light distribution -90 degrees is remarkably reduced to increase luminous efficiency and save energy Adjusting the irradiation range by adjusting the beam angle (condensing condition) of the light source using a lens spacer that is relatively movable with respect to the substrate on which the light-emitting diode element is disposed, while achieving both effects and high cost performance. As long as it is, the specific embodiment may be anything.

For example, the shape of the diode accommodation hole of the lens spacer may be any shape such as a circular shape or an oval shape in plan view as long as it accommodates the light emitting diode element.
The material of the lens spacer may be any material as long as it provides a distance between the light emitting diode element and the condensing lens and reflects light to some extent on the peripheral wall of the diode housing hole.

Below, the light emitting diode unit 100 which is an Example of this invention is demonstrated based on FIG. 1 thru | or FIG.
Here, FIG. 1 is a perspective view showing an outline of an LED lighting device LL provided with a light emitting diode unit 100 according to an embodiment of the present invention, and FIG. 2 shows a light emitting diode unit 100 according to an embodiment of the present invention. FIG. 3 is an exploded perspective view, FIG. 3 is a side sectional view schematically showing the light emitting diode unit 100 according to the embodiment of the present invention, and FIG. 4A is a center C1 of the light emitting diode element 110 of the light emitting diode unit 100. FIG. 4B is a conceptual diagram illustrating a case where the center C2 of the plano-convex lens 120 is shifted in one direction in an arbitrary direction. FIG. It is a key map showing when center C2 is shifted to the other arbitrary direction.

  As shown in FIG. 1, an LED lighting device LL including a light emitting diode unit 100 according to an embodiment of the present invention is disposed in a case casing CA that houses the light emitting diode unit 100 and a front surface of the case casing CA. The transparent resin cover CC and a plurality of light emitting diode units 100 arranged inside the case casing CA are provided.

2 and 3, the light emitting diode unit 100 of the present embodiment includes a light emitting diode element 110, a plano-convex lens 120 as a condenser lens, a substrate 130, a lens spacer 140, and a pressing plate 150. I have.
Among these, the light emitting diode element 110 is provided so as to emit light by electric power supplied via a substrate 130 from a power source (not shown).
In addition, the light emitting diode element 110 includes, as an example, an element integrated lens 111 having a condensing function on the side opposite to the substrate 130.

The plano-convex lens 120 is disposed closer to the transparent resin cover CC than the element integrated lens 111 of the light emitting diode element 110.
Further, the plano-convex lens 120 has a flat surface on the substrate 130 side and a convex spherical surface convex toward the transparent resin cover CC side, and is configured to collect the light from the light emitting diode element 110. Yes.
The substrate 130 is provided with the light emitting diode element 110 and is configured to supply power to the light emitting diode element 110 from a power source (not shown).

The lens spacer 140 is disposed between the plano-convex lens 120 and the substrate 130 and has a plurality of diode housing holes 141 for housing the light emitting diode elements 110 respectively.
Thereby, the distance from the light emitting diode element 110 to the plano-convex lens 120 can be adjusted.

In order to change the distance from the light emitting diode element 110 to the plano-convex lens 120, the thickness of the lens spacer 140 may be changed.
Further, the peripheral wall 141a of the diode housing hole 141 is provided so as to be able to reflect the light of the light emitting diode element 110.
Thereby, the periphery of the light emitting diode element 110 is surrounded by the peripheral wall 141a of the diode housing hole 141, and almost no leakage of scattered light in the light distribution +90 degree direction and the light distribution -90 degree direction occurs.
In the present embodiment, 0 degree of the light distribution is directly in front of the light emitting diode element 110.

The holding plate 150 has a lens insertion hole 151, is disposed on the transparent resin cover CC side of the lens spacer 140, and presses the lens collar portion 121 formed on the outer peripheral edge of the plano-convex lens 120 against the lens spacer 140. Is provided.
Note that the holding plate 150 is fastened with an adjustment screw 160 to the substrate 130 via the lens spacer 140.
As an example, the screw hole 152 in the pressing plate 150 and the screw hole 143 in the lens spacer 140 are provided long in a predetermined direction of the substrate extending direction.
Thereby, as will be described later, the positions of the pressing plate 150 and the lens spacer 140 are relatively movable within a range of the screw holes 143 and 152 in a predetermined direction parallel to the substrate 130 with respect to the substrate 130.

In this embodiment, the lens spacer 140 is formed of a material that does not transmit the light of the light emitting diode element 110, such as a high reflectance resin.
Here, if the light of the light emitting diode element 110 is visible light, it is formed of an opaque or translucent material.
Thereby, the light of the light emitting diode element 110 is reflected by the peripheral wall 141a of the diode housing hole 141.

  When the lens spacer 140 is formed of a material that transmits light from the light emitting diode element 110, the peripheral wall 141a of the diode housing hole 141 may be silver-plated so as not to transmit light from the light emitting diode element 110.

Further, in this embodiment, the peripheral wall 141a is formed in a tapered shape that gradually expands from the substrate 130 side toward the plano-convex lens 120 side.
Thereby, the scattered light in the light distribution +90 degrees direction and the light distribution -90 degrees direction is reflected to the plano-convex lens 120.

In the present embodiment, the peripheral wall 141a is mirror-finished.
Thereby, the scattered light in the light distribution +90 degrees direction and the light distribution -90 degrees direction is reflected to the plano-convex lens 120 with almost no loss.
That is, light including the scattered light from the light emitting diode element 110 is irradiated to the plano-convex lens 120 without waste, and the light collection rate becomes approximately 100%.
Further, as the LED lighting device LL, the brightness is improved by about 30% as compared with the prior art.
That is, the brightness is improved by about 30% by using the lens spacer 140 of this embodiment.

Furthermore, in the present embodiment, the lens collar 121 disposed on the outer periphery of the plano-convex lens 120 is fitted into the collar holding recess 142 disposed on the upper end of the peripheral wall of the diode housing hole 141.
Thereby, the lens spacer 140 also becomes a pedestal of the plano-convex lens 120.

In the present embodiment, the peripheral wall 141a is provided apart from the light emitting diode element 110, and the lens spacer 140 is provided so as to be displaceable in the substrate extending direction with respect to the light emitting diode element 110.
As a result, the center C1 of the light emitting diode element 110 and the center C2 of the plano-convex lens 120 can be aligned, shifted or adjusted.

As shown in FIGS. 4A and 4B, for example, the adjustment screw 160 is loosened so that the positions of the holding plate 150 and the lens spacer 140 are relative to the substrate 130 in a predetermined direction parallel to the substrate 130. Move.
Then, the center C1 of the light emitting diode element 110 and the center C2 of the plano-convex lens 120 are aligned or shifted.
As shown in FIG. 4A, when the center C2 of the plano-convex lens 120 is shifted to the right side in the drawing with respect to the center C1 of the light emitting diode element 110, the light distribution characteristic is biased to the right side in the drawing.
On the other hand, as shown in FIG. 4B, when the center C2 of the plano-convex lens 120 is shifted to the left side in the drawing with respect to the center C1 of the light emitting diode element 110, the light distribution characteristic is biased to the left side in the drawing.

  In the light emitting diode unit 100 according to the embodiment of the present invention thus obtained, the lens spacer 140 disposed between the plano-convex lens 120 which is an optical lens and the substrate 130 accommodates the light emitting diode element 110. The diode housing hole 141 is formed, and the peripheral wall 141a of the diode housing hole 141 is formed in a tapered shape that gradually expands from the substrate 130 side toward the plano-convex lens 120 side, and the scattered light of the light-emitting diode element 110 is transmitted to the plano-convex lens 120 side. The mirror plate is finished so as to be reflected toward the substrate, and the holding plate 150 and the lens spacer 140 are provided in the substrate extending direction of the substrate 130 so as to be movable relative to the substrate 130 and the adjustment screw 160 is passed therethrough. By having the respective screw holes 152, 143 (that is, long holes), light distribution +90 Direction and light distribution-The loss of scattered light in the 90-degree direction can be remarkably reduced to improve luminous efficiency and achieve both energy savings and high cost performance, while adjusting the beam angle of the light source (condensing condition) The irradiation range can be adjusted.

Further, since the lens spacer 140 is formed of a material that does not transmit the light of the light emitting diode element 110, leakage of scattered light can be completely prevented.
Furthermore, since the peripheral wall 141a of the lens spacer 140 is formed in a tapered shape that gradually expands from the substrate 130 side toward the plano-convex lens 120 side, the light emission efficiency can be further increased.
In addition, since the peripheral wall 141a of the lens spacer 140 is mirror-finished, the light emission efficiency can be further increased.

  Further, since the lens collar 121 disposed on the outer periphery of the plano-convex lens 120 is seated in the collar holding recess 142 disposed on the upper end of the peripheral wall of the diode housing hole 141, the plano-convex lens 120 is accurately positioned. be able to.

  Further, the peripheral wall 141a of the lens spacer 140 is provided apart from the light emitting diode element 110, and the lens spacer 140 is provided so as to be displaceable in the substrate extending direction with respect to the light emitting diode element 110. The effect of the light irradiation diode 110 and the plano-convex lens 120 can be adjusted without changing the direction of the light emitting diode element 110 and the plano-convex lens 120.

DESCRIPTION OF SYMBOLS 100 ... Light emitting diode unit 110 ... Light emitting diode element 111 ... Element integrated lens 120 ... Plano-convex lens (condensing lens)
121 ... Lens collar 130 ... Substrate 140 ... Lens spacer 141 ... Diode housing hole 141a ... Peripheral wall 142 ... Collar holding recess 143 ... Screw hole 150 ... Presser plate 151 ... Lens insertion hole 152 ... Screw hole 160 ... Adjustment screw 500 ... Light emitting part 510 ... Light emitting diode 520 ... Lens (condensing lens)
530 ... Substrate CA ... Case casing CC ... Transparent resin cover C1 ... Light emitting diode element center C2 ... Plano-convex lens center LL ... LED illumination device

Claims (6)

A light emitting diode element, a condensing lens for condensing light from the light emitting diode element, a substrate on which the light emitting diode element is disposed, a lens spacer disposed between the condensing lens and the substrate, and the lens spacer on the substrate A light-emitting diode unit comprising a presser plate to be pressed to the side and an adjustment screw for fastening the presser plate to the substrate,
The lens spacer has a plurality of diode accommodation holes for accommodating the light emitting diode elements,
The peripheral wall of the diode housing hole is formed in a tapered shape that gradually expands from the substrate side toward the condensing lens side, and reflects the scattered light of the light emitting diode element toward the condensing lens side. Finished and
The holding plate and the lens spacer each have a long screw hole that is provided in the substrate extending direction of the substrate so as to be relatively movable with respect to the substrate and through which the adjustment screw is passed. Light-emitting diode unit featuring.   2. The light emitting diode unit according to claim 1, wherein the lens spacer is formed of a material that does not transmit light of the light emitting diode element.   The said holding plate has a lens insertion hole provided so that the lens collar part formed in the outer periphery of the said condensing lens may be pressed with respect to a lens spacer, The Claim 1 or Claim 2 characterized by the above-mentioned. The light emitting diode unit described in 1.   4. The lens collar portion disposed on the outer periphery of the condenser lens is seated in a collar holding recess disposed on the upper end of the peripheral wall of the diode housing hole. The light emitting diode unit as described in any one.   A peripheral wall of the diode housing hole is provided apart from the light emitting diode element, and the lens spacer is provided so as to be displaceable in a substrate extending direction with respect to the light emitting diode element. The light emitting diode unit according to any one of claims 1 to 4. A case housing that houses the light-emitting diode unit according to any one of claims 1 to 5, a transparent resin cover disposed on a front surface of the case housing, and an array inside the case housing An LED lighting device comprising: a light emitting diode unit.