JP2010021157A - Led lamp diffusion assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform light diffusion of an LED lamp to irradiate an area of short distance of a light source. <P>SOLUTION: An assembly lamp has: a great number of LEDs 1 jutting out in space of the surface side of a substrate 2; and a translucent cover 3 covering the sides of the surfaces of the LEDs 1. The protruding ends of the LEDs 1 get buried within the internal surface of the cover 3 in close contact state. The cover 3 is integrally molded so as to be close contact with parts of the peripheral surfaces of the ends of the LEDs 1, and space is formed between the substrate 2 and the internal surface of the cover 3, so that light of LEDs 1 is diffused on the side of the surface in the section of the cover 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a collective diffusion type LED lamp used for outdoor spot lighting, signboard lighting, building wall lighting, garden lights, work lights (indoors and outdoors), fish collection lights, underwater lighting, and the like.

  Conventionally, Patent Document 1 is known as a collective LED lamp mainly for outdoor use in which a large number of LEDs are arranged on a base for the above-described uses and importance is attached to waterproofness and heat dissipation. In general, many LED lamps have a strong light straightness (light condensing property). Therefore, as shown in FIG. 5B, a structure for diffusing light to irradiate a short distance range is used. A concave lens-shaped protrusion 3d is integrally projected on the inner surface of the cover 3, or a reflector or a minute surface on the surface so that light is diffused and transmitted through the inner surface of the cover 3 as shown in FIG. The thing which stuck the diffusion member 3e of the sheet form etc. which attaches unevenness and permeate | transmits and permeate | transmits is known.

Utility model registration No. 3129693

However, in the case where the concave lens-shaped protrusions shown in FIG. 5B are provided, a circular light ring is formed for each protrusion, so that the brightness of the irradiation surface and the light source becomes unnatural and uneven, and a concave lens shape There is a drawback that a mold for forming the protrusion is required.
5 (B) requires diffuse reflection on the inner surface of the diffusing member to reduce the light transmission amount, and it is necessary to attach the diffusing member to the inner surface of the cover or to fix it under other heat-resistant conditions.

  The LED lamp of the present invention for solving the above problem is a collective lamp in which a number of LEDs 1 are first projected in a space on the surface side of a substrate 2 and the surface side of the LED 1 is covered with a translucent cover 3. The cover 3 is embedded in the inner surface thereof so that the protruding end of the LED 1 is in close contact, and is molded so as to be in close contact with a part of the peripheral surface of the LED 1, and the inner surface of the substrate 2 and the cover 3 A space is formed between them, and the light of the LED 1 is diffused to the surface side in the cross section of the cover 3.

  Second, it is characterized in that a part or all of the inner surface side of the cover 3 is formed by molding a plastic material.

  Thirdly, the cover 3 is formed in a plate shape or a dish shape in advance, and is formed by molding on the inner surface side of the outer cover 3a and the outer cover 3a that is directly or indirectly fixed to the substrate 2 side. And an inner cover 3b for embedding the material.

  Fourth, at least the front side of the cover 3 is formed to have a uniform thickness, and the LED 1 is embedded in the thickness of the cover 3.

  Fifth, the cover 3 is made of a transparent plastic material.

If the LED lamp of the present invention configured as described above is equipped with a small type of LED that is excellent in both light quantity and light condensing performance in a lighting contractor or the like, the buried depth of the LED in the cover on the LED front side or the cover By adjusting or selecting the thickness and the cover material, it is possible to obtain a light source having an arbitrary light amount and diffusivity. Therefore, it is economical because it is not necessary to prepare (inventory) various types of LEDs with different diffusion rates and light amounts.
Moreover, unlike the conventional LED light diffusion technology, there is no need to provide a concave lens-like protrusion on the cover side, and there is no need to insert a diffusion plate on the inner surface of the cover. There is an advantage that a distance range can be irradiated.

It is a top view showing the surface of the lamp | ramp of this invention. It is front sectional drawing of the lamp | ramp of this invention. It is a partial expanded side surface sectional view of the lamp | ramp of this invention. (A), (B) is an image figure of the irradiation range of the light of the lamp | ramp of this invention and the lamp | ramp which does not provide an inner cover. (A) is the lamp | ramp of this invention, (B), (C) is a fragmentary sectional view which shows the light-diffusion structure of the conventional lamp | ramp.

  DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention shown below will be described. All the drawings show one embodiment of the collective diffusion type LED lamp of the present invention, FIG. 1 shows an arrangement surface (surface) of the lamp L, and FIG. FIG. 3 shows a partially enlarged front section.

  In this example, the entire lamp L forms a rectangular parallelepiped of about 154 × 154 × 40, and a large number (18 × 18) of LEDs 1 are mounted on the front surface and printed wiring is provided on the back surface (not shown). A resin substrate 2 is accommodated and fixed in the edge of the peripheral wall of a transparent acrylic resin box-shaped or square dish-shaped outer cover 3a. A pressure release and drainage hole 5 in the cover is provided at a position which is located downward when the outer cover 3a is installed.

  For example, a plastic material such as an epoxy resin is molded into a plate shape with a predetermined thickness on the LED facing surface of the inner surface of the outer cover 3a (flowing plastic is poured (injected) and then cured). An inner cover 3b is formed. The cover 3 is constituted by the cover 3a and the inner cover 3b.

  The molding material of the inner cover 3b diffuses and transmits the light of the LED 1 outward as described below, and can be selected from any material such as colorless and transparent, yellow, or turbid white or others as necessary. The amount of transmitted light can be adjusted by coloring. Since the outer cover 3a and the inner cover 3b are tightly joined, in the case of materials of the same color, the joint surfaces of the two are bonded and no boundary line (surface) is formed. The permeation of is not hindered.

  Further, the protruding end of the LED is embedded (submerged) by a predetermined depth S (see FIG. 5A) at the time of molding and is in close contact with the inner surface side of the inner cover 3b. The boundary line at the joint surface with 3b does not appear, and both are integrally joined.

  With this structure, the light emitted from the embedded portion of each LED 1 is diffused in all directions within the cross section of the inner cover 3b and the outer cover 3a, and the degree of diffusion (rate) varies depending on the size of the buried depth S. The greater the S, the greater the degree of diffusion.

  A notch-shaped step 4 is formed on the entire inner periphery of the opening end of the peripheral wall of the outer cover 3a, and the substrate 2 is accommodated in the step 4 with a slight clearance. When the substrate 2 is pressed and inserted into the stepped portion 4, it enters below the spherical engaging projections 6 formed of small projections projecting at a plurality of locations on the inner periphery of each side of the stepped portion 4 and is fixed. Thus, warping of the substrate 2 is prevented.

  On the back side of the substrate 2, an outer cover 3a in which a silicone resin with excellent heat dissipation (thermal conductivity) and a silicone resin with excellent waterproof properties are mixed and a resin having an adhesive force with the substrate 2 side is molded with a thickness of about 2 mm. Etc., and the heat radiation layer 7 is formed. The heat radiation layer 7 is bonded to the back surface of the substrate 2 and also enters and adheres to a clearance portion between the outer periphery and the inner periphery of the step portion 4, thereby fixing the substrate 2 and improving the waterproofness of the cover.

  Further, a bottom surface of a heat sink (heat radiating plate) 8 made of an aluminum extrusion molding material or the like is bonded and fixed to the back surface of the heat radiating layer 7 in a pressed state, and the heat radiating layer 7 conducts heat of the substrate 2 overheated by the LED with high heat conduction. Is conducted to the heat sink 8 to promote heat dissipation. Bolt holes 9 are formed in the side surfaces of the heat sink 8 for fastening a lamp mounting bracket (not shown).

  The substrate 2 has a waterproof film 11 that is pre-coated with a waterproof paint or adhesive having heat resistance and water resistance on both the front side and the back side, with the LED 1 mounted and connected to the printed wiring on the back side. Is formed, so that water from the base end portion of the LED, the soldered portion on the back surface of the substrate, and the terminal portion is prevented. Reference numeral 12 denotes a wiring hole into the cover 3.

  In this embodiment, the average LED power consumption is 19.6 W under DC 11 to 13.5 V, average 1.6 A, but the surface temperature of the substrate 2 when the heat dissipation layer 7 is not provided is 80 ° C. On the other hand, when the heat dissipation layer 7 was provided, the temperature could be lowered to about 50 ° C.

  In the illustrated embodiment, a space is formed between the substrate 2 and the inner cover 3b, and only the front end side of the LED 1 is embedded in the inner cover 3b.

  4A and 4B are comparison diagrams of images of light diffusion states in the case of the present embodiment and in Patent Document 1 in which the inner cover 3b is not provided. In the light diffusion state diagram (A) of the present invention, the distance that the light from the lamp L reaches is short (the most advanced P2 point is about 1.5 m), but the illuminance at this P2 point is about 20 Lux, and the maximum irradiation area position Illuminance at the center P1 point (about 0.8 m) is about 1200 Lux.

  On the other hand, in the case where the inner cover 3b shown in FIG. 5B is not provided, the center P1 point at the maximum irradiation area position around the optical axis when the illuminance at the P2 point (about 15.0 m) is about 5.0 Lux. The illuminance at (approximately 3.0 m) is approximately 700 Lux, and it can be seen that the near distance position in front of the lamp L is clearly brighter in FIG.

1 LED
2 Substrate 3 Cover 3a Outer cover 3b Inner cover L Lamp

Claims (5)

  In the collective lamp in which a large number of LEDs (1) are protruded in the space on the surface side of the substrate (2) and the surface side of the LEDs (1) is covered with a translucent cover (3), the cover (3) The LED (1) has a protruding end embedded in close contact with the inner surface thereof, and is molded so as to be in close contact with a part of the peripheral surface of the LED (1), and the substrate (2) and cover ( The collective diffusion type LED lamp which forms a space between the inner surface of 3) and diffuses the light of the LED (1) to the surface side in the cross section of the cover (3).   The collective diffusion type LED lamp according to claim 1, wherein a part or all of the inner surface side of the cover (3) is formed by molding a plastic material.   The cover (3) is previously formed into a plate shape or a dish shape, and is molded by a mold on the inner surface side of the outer cover (3a) and the outer cover (3a) fixed directly or indirectly to the substrate (2) side, The collective diffusion type LED lamp according to claim 1 or 2, comprising an inner cover (3b) for embedding the protruding end of the LED (1).   The collective diffusion LED lamp according to claim 1, 2 or 3, wherein at least the front side of the cover (3) is formed to have a uniform thickness, and the LED (1) is embedded in the thickness of the cover (3).   5. The collective diffusion type LED lamp according to claim 1, wherein the cover (3) is made of a transparent plastic material.

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