JP2012204187A - Lamp and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp and a lighting fixture capable of improving luminance at a rear face side of an LED mounting surface of a substrate.SOLUTION: The LED lamp includes: an LED module 5 having a translucent module substrate 5a and LEDs 6 mounted on both sides 5a2, 5a1 of this translucent module substrate; a translucent lamp cover 2 which accommodates the LED module and has supporting lines 2a, 2b for supporting the transparent module substrate; and a light controlling part 13 which is arranged on the lamp cover to face one surface or the other surface of the translucent module substrate and has translucency and light-reflecting property.

Description

  Embodiments described herein relate generally to an LED lamp and a lighting fixture.

  Conventionally, this kind of straight tube type LED lamp is known. For example, an LED lamp in which an LED module in which a plurality of LEDs (light emitting diodes) are mounted on a substrate is accommodated in a circular lamp cover is known (for example, see Patent Document 1).

JP 2010-123359 A

  However, in this type of LED lamp, the luminous flux in the direction perpendicular to the LED mounting surface of the LED module substrate is large and bright, but the back surface side of the LED mounting surface hardly shines and is dark. For this reason, when this LED lamp is incorporated into a lighting fixture attached to a ceiling or the like and is lit, the room below the LED mounting surface in the vertical direction is bright, but the ceiling side which is the back side of the LED mounting surface The problem of becoming darker is considered.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an LED lamp and a luminaire that can improve the brightness of the back side of the LED mounting surface of the substrate.

  According to this embodiment, a light-transmitting substrate and an LED module having an LED mounted on one surface of the substrate; and a light-transmitting cover including a support portion that houses the LED module and supports the substrate And;

  In addition, according to the present embodiment, there is provided a light control portion that is disposed on the cover so as to face one surface or the other surface of the substrate and has translucency and light reflectivity.

The II sectional view taken on the line of FIG. 3 which shows the disassembled perspective view of the LED lamp which concerns on the 1st Embodiment of this invention. 1 is a partially cutaway perspective view of an LED lamp according to a first embodiment of the present invention. The partial notch disassembled perspective view of the state which removed the power supply base and the grounding base from the lamp cover. FIG. 4 is a partially cutaway perspective view of the LED module shown in FIGS. 1 and 3. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. The front view of the lighting fixture which concerns on the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in several drawing.

(First embodiment)
FIG. 2 is a partially cutaway external perspective view of the LED lamp according to the first embodiment of the present invention, and FIG. 3 is a partially cutaway exploded perspective view of the same.

  As shown in FIGS. 1 to 3, the LED lamp 1 has brightness equivalent to a straight tube fluorescent lamp such as a 20 W type or a 40 W type, and has a tube diameter of about 25.5 mm and a length equivalent to a 20 W type. A power supply cap 3 of an L-shaped pin cap GX16t-5 defined by, for example, JEL801, is provided at both ends of the axial opening of the lamp cover 2 having a straight circular tubular translucency having a shape equivalent to 600 mm and 40 W, and having a translucent shape. And the grounding cap 4 are respectively fitted and fixed with an adhesive such as silicone resin.

  The power supply base 3 is a base that receives direct current (DC) power of a required voltage from a power supply socket or the like of a lighting fixture, which will be described later, and is electrically insulated by being fitted on one end of the axial opening of the circular lamp cover 2. A pair of conductive left and right L-shaped pins 3b, 3b projecting substantially parallel outward in the axial direction on the outer surface of the bottom of the base body 3a. Are arranged side by side. On the inner bottom surface of the base body 3a, a pair of power feeding connectors 3c and 3c projecting substantially in parallel in the axial direction is provided. The inner ends of the power supply connectors 3c and 3c are electrically connected to the inner ends of the pair of L-shaped pins 3b and 3b, respectively.

  The grounding cap 4 has a base body 4a made of a short-axis bottomed cylindrical body that is fitted on the other end of the lamp cover 2 in the axial direction, and the inner end of the LED module 5 is brought into contact with the inner surface thereof. Electrically connected by, for example, a conductive earth pin 4b projecting outward is provided in a substantially central portion of the outer surface of the base body 3a. The earth pin 4b is detachably attached to a grounding socket or the like of the lighting fixture.

  As shown in FIGS. 1 and 3, the lamp cover 2 is formed of a synthetic resin such as polycarbonate or glass having translucency, for example, and both end portions in the width direction of the LED module 5 are disposed in the thickness direction in the inside thereof. A pair of left and right prism-shaped supporting protrusions 2a and 2b projecting inward in FIG. 1 and FIG. 3 projecting inward for clamping. These supporting ridges 2a and 2b are formed with fitting recesses 2a1 and 2b1 at the projecting inner ends thereof, in which both end portions in the width direction of the transparent module substrate 5a of the LED module 5 are removably inserted.

  The pair of supporting protrusions 2a and 2b are deviated by a predetermined length from the central axis O of the lamp cover 2 to one end in the radial direction (upward in FIGS. 1 and 3), and are parallel to the central axis O. (Horizontal plane in FIGS. 1 and 3) project inward by a predetermined length, and are formed substantially parallel to the central axis O and almost the entire length of the lamp cover 2. The lamp cover 2 in which the supporting protrusions 2a and 2b are integrally formed as described above is integrally formed by, for example, extrusion molding of synthetic resin such as polycarbonate having translucency.

  The LED module 5 is made of, for example, glass epoxy resin, paper phenol, paper epoxy, glass composite, alumina type having electrical insulation and translucency, which is an example of a substrate, and is a rectangle having a length substantially equal to the lamp cover 2. It has a flat transparent module substrate 5a. On the front and back sides of the transparent module substrate 5a, there are SMD (surface mount type), COB (Chip On Board) type, etc., for example, a plurality of white light emitting LEDs 6, 6,. For example, it is mounted in a row at a required pitch.

  The transparent module substrate 5a is formed with circuit patterns (not shown) on both surfaces (upper and lower surfaces in FIGS. 1 and 3), and a pair of LEDs 6 on a plurality of pairs of electrodes (not shown) of these circuit patterns. The electrodes are fixed and electrically connected. One of the pair of upper and lower circuit patterns is formed in the forward path of the direct current, and the other is formed in the return path.

  That is, as shown in FIGS. 4 and 5, the transparent module substrate 5a is formed with circuit patterns on both upper and lower surfaces thereof, and a pair of upper and lower large transparent electrodes 7 and 8 are formed on these circuit patterns. ing. These large transparent electrodes 7 and 8 are formed at a required pitch in the longitudinal direction of the transparent module substrate 5a. Further, the pair of upper and lower transparent electrodes 7 and 8 extend longer in the short direction of the transparent module substrate 5a than the distance between the plurality of LEDs 6, 6,. That is, the length of the transparent modules 7 and 8 in the short direction (width direction) of the transparent module substrate 5a is longer than the distance between the plurality of LEDs 6, 6,. The pair of upper and lower transparent electrodes 7 and 8 are formed in a large size that occupies, for example, 60% to 80% of each flat area of the front and back surfaces of the transparent module substrate 5a, and have both functions as an electrode and a heat dissipation surface. A pair of electrodes of each LED 6 is fixed between the end portions of these large transparent electrodes 7 and 8 adjacent to each other in the longitudinal direction of the substrate. On the outer surfaces (upper and lower surfaces in FIG. 5) of these transparent electrodes 7 and 8, transparent insulating layers 9 and 10 having electrical insulation and translucency are formed in the middle of the LEDs 6, 6,. The entire transparent module substrate 5a is formed transparent.

  The transparent module substrate 5a is provided with a pair of upper and lower (front and back) power receiving connectors 11a and 11b on the upper and lower (front and back) surfaces of one end portion on the power supply base 3 side. These power receiving connectors 11a and 11b are detachably fitted to and electrically connected to power feeding connectors 3c and 3c on the power feeding base 3 side. Further, each of the power receiving connectors 11a and 11b is connected to each LED 6 through a circuit pattern (not shown) of the transparent module substrate 5a. The DC power received by the power receiving connectors 11a and 11b is supplied to each LED 6 to emit white light. .

  Further, on the upper surface of the transparent module substrate 5a, a bridge diode (not shown) may be mounted behind the pair of power receiving connectors 11a and 11b (on the right side in FIG. 3). The bridge diode feeds each LED 6 with DC power having the correct polarity regardless of whether the polarity of the DC power received by the pair of L-shaped pins 3b and 3b of the power supply cap 3 is positive or negative.

  Furthermore, the transparent module substrate 5a forms a circuit pattern that is folded back to one end portion (left end portion in FIG. 3) on the power supply base 3 side at one end portion (right end portion in FIG. 3) on the ground base 4 side. The right end portion in FIG. 3 of the transparent module substrate 5a is electrically connected by directly contacting the inner surface of the grounding cap 4 or by connecting with a lead wire.

  Further, in order to electrically connect the circuit patterns of the plurality of transparent module substrates 5a, 5a,... To one end in the longitudinal direction of the transparent module substrate 5a (the right end in FIG. 2), a pair of connecting connectors 12a on the left and right in the figure. , 12b may be provided.

  As shown in FIG. 1, the lamp cover 2 has a light-transmitting and reflective light-controlling surface on the inner surface of the transparent module substrate 5a facing the rear surface (the upper surface in FIGS. 1 and 3) 5a1. Part 13 is formed.

  The light control part 13 is formed over substantially the entire length of the lamp cover 2 at the required center angle of the lamp cover 2, and has a plurality of reflection parts and light transmission parts. The reflective part is formed with a required density and a plurality of reflective parts having a required shape and dimensions, in which a reflective paint such as a white paint is applied in the form of dots, and a plurality of white lights from the LEDs 6, 6,. Reflected by the reflective part. The transmission part is a gap between the plurality of reflection parts, and transmits light. For this purpose, the amount of light reflected to the LED module 5 side by adjusting the shape, size, and formation density of the dot-shaped reflecting portion, and the amount of transmitted light that is transmitted to the outside through the back surface portion 2c of the lamp cover 2 Can be controlled.

  Next, the operation of the LED lamp 1 will be described.

  When the power supply base 3 of the LED lamp 1 is attached to a socket such as a lighting fixture described later and a pair of L-shaped pins 3b and 3b of the power supply base 3 is supplied with a predetermined voltage, this DC power Is fed to the circuit pattern of the LED module 5 through the power feeding connectors 3c and 3c, the power receiving connectors 11a and 11b, and the bridge diode.

  The bridge diode supplies power to the LED module 5 in accordance with the polarity of the LED module 5 even when the polarity of the DC power received by the power supply base 3 is different from the polarity of the circuit pattern of the LED module 5.

  Thereby, the plurality of LEDs 6, 6,... On the front and back surfaces 5a2, 5a1 of the LED module 5 emit white light.

  In FIG. 1, the white light emitted from the LEDs 6, 6,... On the surface (lower surface in FIG. 1) 5a2 side of the transparent module substrate 5a is mainly irradiated downward in the vertical direction of the transparent module substrate 5a and transmitted through the lamp cover 2. 1 is irradiated downward, and the remaining white light is transmitted through the transparent module substrate 5a and irradiated to the back surface (upper surface in FIG. 1) 5a1 side and irradiated to the light control portion 13 of the back surface portion 2c of the lamp cover 2. Is done. In the light control unit 13, white light is reflected to the LED module 5 side by the plurality of dot-shaped reflection units, and is transmitted to the outside, that is, the back surface 2 c side of the LED lamp 1 through the plurality of light transmission units. Is done.

  On the other hand, the white light emitted from the LEDs 6, 6,... On the back surface (upper surface in FIG. 1) 5a1 side of the transparent module substrate 5a is mainly irradiated upward in the vertical direction of the transparent module substrate 5a. The light control unit 13 is irradiated. In the light control unit 13, white light is reflected to the transparent module substrate 5 a side by a plurality of dot-like reflection units, and is transmitted to the back side of the LED lamp 1 through the light transmission unit. The remaining light passes through the transparent module substrate 5a and is also irradiated downward in FIG.

  For this reason, it is possible to improve the brightness of the back surface 2c side of the lamp cover 2, that is, the back surface side of the LED lamp 1.

  Moreover, since the LED lamp 1 has the LEDs 6, 6,... Mounted on the front and back surfaces 5a2, 5a1 of the transparent module substrate 5a, the amount of white light emitted from the LEDs 6, 6,. Therefore, the brightness uniformity of the entire LED lamp can be improved. Moreover, since the back surface side of the LED lamp 1 is irradiated by the white light emission of the LEDs 6, 6,... On the front and back surfaces 5a2, 5a1, it is possible to further improve the brightness on the back surface side.

  Even when the LEDs 6, 6,... Are mounted only on the back surface 5a1 (upper surface in FIG. 1) side of the transparent module substrate 5a, the brightness on the back surface side of the LED lamp 1 can be improved.

(Second Embodiment)
FIG. 6 is a schematic front view of a lighting fixture 21 according to the second embodiment of the present invention. The lighting fixture 21 includes the LED lamp 1 and a fixture main body 22 having a required shape and size.

  The instrument main body 22 has a chassis 22a made of sheet metal or the like that is directly attached to the ceiling or the like, for example, by being suspended, and the chassis 22a has a predetermined voltage applied to the feeding base 3 of the LED lamps 1 and 1A. A power supply device (not shown) that supplies DC power for lighting and a power supply socket electrically connected to the power supply device, for example, 23a, and a ground socket 23b are provided as holding members.

  These sockets 23a and 23b are constituted by sockets suitable for the power supply base 3 and the ground base 4 of the JEL 801 of the LED lamps 1 and 1A, and are detachably attached to the bases 3 and 4.

  According to this luminaire 21, since the LED lamp 1 is provided, the brightness on the back surface 2 c side of the LED lamp 1, that is, the luminaire main body 22 side can be improved in the same manner as the LED lamp 1. it can. For this reason, the uniformity of the brightness of the whole LED lamp 1 can be improved.

  In the above embodiment, the case where the front and back surfaces 5a1, 5a2 of the transparent module substrate 5a are each provided with one row of LEDs 6, 6,... Has been described, but the present invention is not limited to this. , 6,... May be provided in a plurality of rows. Further, the LED lamp 1 may be formed in a ring shape.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... LED lamp, 2 ... Lamp cover (cover), 5 ... LED module, 5a ... Transparent module substrate, 5a1 ... Back surface of transparent module substrate, 5a2 ... Front surface of transparent module substrate, 6 ... LED, 7, 8 ... Front and back pair A transparent electrode of 9, 10 ... a pair of front and back transparent insulating layers.

Claims (4)

An LED module having a light-transmitting substrate and an LED mounted on one surface of the substrate;
A light-transmitting cover having a support portion that houses the LED module and supports the substrate;
A light control portion disposed on the cover so as to face one surface or the other surface of the substrate and having translucency and light reflectivity;
An LED lamp characterized by comprising: 2. The LED lamp according to claim 1, wherein the LEDs are mounted on both sides of the substrate. In the LED module, a plurality of LEDs are mounted apart in the longitudinal direction on the substrate. Each LED is electrically connected on the LED mounting surface, and in the shorter direction of the substrate than the distance between the LEDs. 3. The LED lamp according to claim 1, further comprising a translucent electrode extending long. An LED lamp according to any one of claims 1 to 3;
An instrument body having a holding member for holding the LED lamp in an energizable manner;
A lighting fixture comprising:

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