WO2014006901A1

WO2014006901A1 - Lamp and lighting apparatus

Info

Publication number: WO2014006901A1
Application number: PCT/JP2013/004142
Authority: WO
Inventors: 高橋　健治; 堀内　誠; 隆在植本
Original assignee: パナソニック株式会社
Priority date: 2012-07-05
Filing date: 2013-07-03
Publication date: 2014-01-09
Also published as: JP2016015336A; JP6089309B2; JP5887519B2; CN203743910U; JPWO2014006901A1

Abstract

A lamp (10), i.e., a long lamp, is provided with: an LED module (50), which has LEDs (53) and a mounting board (52) having the LEDs (53) provided thereon; a long base (30), which has a recessed section (31) formed in the surface thereof, said recessed section having the LED module (50) provided therein; a long light transmitting cover (20) configured to cover the LED module (50); and a diffusion member (40), which is provided between the LED module (50) and the light transmitting cover (20) such that the diffusion member is positioned inside of the recessed section (31), and which diffuses light emitted from the LEDs (53).

Description

Lamp and lighting device

The present invention relates to a lamp and a lighting device, for example, a straight tube type LED lamp using a light emitting diode (LED) and a lighting device including the same.

LED is expected to be a new light source in various lamps such as fluorescent lamps and incandescent lamps known from the viewpoint of high efficiency and long life, and research and development of lamps using LEDs (LED lamps) is promoted ing.

As an LED lamp, a straight tube type LED lamp (straight tube type LED lamp) replacing a straight tube fluorescent lamp having an electrode coil at both ends, or a bulb shape LED replacing a bulb fluorescent lamp or an incandescent lamp There is a lamp (bulb-shaped LED lamp) etc. For example, Patent Document 1 discloses a conventional straight tube LED lamp.

JP, 2009-43447, A

By the way, in the straight tube type LED lamp, an LED module including a mounting substrate and a plurality of LEDs mounted on the mounting substrate is used as a light source. And in such an LED module, the light emission part (area | region where LED exists) and the other non-light-emission part (area | region where LED does not exist) exist on a mounting substrate. Therefore, in the straight tube type LED lamp, there is a problem that a crush feeling is given (the appearance display property is lowered) or the luminance unevenness occurs. In particular, when the number of mounted LEDs of the LED module is reduced for the purpose of cost reduction of the straight tube type LED lamp, etc., the distance between adjacent LEDs becomes wide, so the problem of such uneven brightness tends to occur. .

Then, an object of this invention is to provide the lamp | ramp and illuminating device which can suppress a brightness nonuniformity in view of this problem.

In order to achieve the above object, a lamp according to one aspect of the present invention is a long lamp, and a light emitting module having a light emitting element and a substrate provided with the light emitting element, and the light emitting module An elongated base provided with a recess is formed on the surface, an elongated translucent cover configured to cover the light emitting module, and the inside of the recess or above the recess As described above, it is characterized in that it comprises: a diffusion member provided between the light emitting module and the light transmitting cover, for diffusing light emitted from the light emitting element.

Here, a step is formed on the side wall of the recess of the base, and the diffusion member has a plate shape, and the step is formed on the step so as to cover at least a part of the opening of the recess of the base. It may be placed on the

The diffusion member may be a resin, and may be provided in the recess so as to be in contact with the light emitting element.

The diffusion member may have a high diffusion rate above the portion of the substrate on which the light emitting element is provided and a low diffusion rate above the portion of the substrate on which the light emitting element is not provided.

In addition, the side surface of the recess of the base may reflect light emitted from the light emitting element toward the opening of the recess.

The base may be made of metal, and the diffusion member may be in contact with the base.

Further, the light transmitting cover is a cutout cylindrical member having a main opening in which a part of a long cylinder is cut out in a longitudinal direction, and the base is configured to close the main opening. A light cover may be held.

Further, a groove may be formed in the base for slidably holding the translucent cover.

In addition, the light transmitting cover may be made of glass or resin and diffuse light emitted from the light emitting element.

Further, a lighting device according to one aspect of the present invention includes the above lamp.

According to the present invention, it is possible to realize a lamp and a lighting device capable of suppressing luminance unevenness.

FIG. 1 is a perspective view of a lamp according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the lamp according to the first embodiment of the present invention. FIG. 3A is an enlarged perspective view of a part of the lamp according to the first embodiment of the present invention. FIG. 3B is a perspective view showing the configuration of a modified example of the translucent cover of the lamp according to the first embodiment of the present invention. FIG. 4A is a plan view of the LED module according to the first embodiment of the present invention. FIG. 4B is a cross-sectional view of the LED module according to the first embodiment of the present invention. FIG. 5 is an enlarged perspective view of a part of Modification 1 of the lamp according to the first embodiment of the present invention. FIG. 6 is an enlarged perspective view of a part of Modification 2 of the lamp according to the first embodiment of the present invention. FIG. 7 is an enlarged perspective view of a part of Modification 3 of the lamp according to the first embodiment of the present invention. FIG. 8 is a perspective view of Modification 4 of the lamp according to the first embodiment of the present invention. FIG. 9 is an exploded perspective view of Modification 4 of the lamp according to the first embodiment of the present invention. FIG. 10 is an enlarged perspective view of a part of Modification 4 of the lamp according to the first embodiment of the present invention. FIG. 11 is a perspective view of modification 5 of the lamp according to the first embodiment of the present invention. FIG. 12 is an exploded perspective view of Modification 5 of the lamp according to the first embodiment of the present invention. FIG. 13 is an enlarged perspective view of a part of Modification 5 of the lamp according to the first embodiment of the present invention. FIG. 14 is an enlarged perspective view of a portion of a modification 6 of the lamp according to the first embodiment of the present invention. FIG. 15 is a perspective view enlarging a part of modified example 7 of the lamp according to the first embodiment of the present invention. FIG. 16 is a perspective view of a lighting device according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below each show a preferable specific example of the present invention. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components not described in the independent claim showing the highest concept of the present invention are not necessarily required to achieve the object of the present invention, but are more preferable. It is described as constituting a form. Further, in the drawings, elements that represent substantially the same configuration, operation, and effect are denoted by the same reference numerals.

First Embodiment
First, a lamp 10 according to a first embodiment of the present invention will be described using FIGS. 1 to 3A.

FIG. 1 is a perspective view showing the configuration of the lamp 10 according to the present embodiment with the translucent cover 20 up. 2 is an exploded perspective view of the lamp 10 with the base 60 removed, and FIG. 3A is a portion of the lamp 10 with the base 60 removed (the end of the lamp 10 in the tube axial direction Part) is an enlarged perspective view.

The lamp 10 is, as shown in FIGS. 1 to 3A, a long straight tube LED lamp used as an alternative illumination of a conventional straight tube fluorescent lamp (straight tube fluorescent lamp) , A base 30, a diffusion member 40, an LED module 50, a base 60, and a lighting circuit (not shown). In the lamp 10, the base 60, the translucent cover 20, and the base 30 constitute a long lamp casing (outer envelope).

[Transparent cover]
The translucent cover 20 is a long cover member that constitutes the outer surface of the lamp housing, and protects the members provided on the base 30, that is, the LED module 50, the lighting circuit, and the like. The translucent cover 20 is formed of a cutout cylindrical member having a main opening 20a formed by cutting out a part of an elongated cylinder along the longitudinal direction (tube axis direction), for example, a substantially semi-cylindrical member Be done.

The translucent cover 20 is made of a material that transmits the light emitted by the LED module 50 to the outside of the lamp. The translucent cover 20 is made of, for example, a transparent resin material or glass made of acrylic or the like, and can be formed by resin molding a desired transparent resin material.

The translucent cover 20 is, for example, a straight pipe (glass pipe) made of soda lime glass of 70 to 72 [%] of silica (SiO ₂ ), or a straight pipe (plastic) made of a resin material such as polycarbonate Tube) can be used.

The translucent cover 20 includes a light diffusion portion having a light diffusion function for diffusing the light from the LED module 50. Thereby, the light emitted from the LED module 50 can be diffused when passing through the translucent cover 20. Examples of the light diffusion portion include a light diffusion sheet or a light diffusion film formed on at least one of the inner surface and the outer surface of the translucent cover 20. Specifically, a milky white light diffusing film formed by adhering a resin or a white pigment containing a light diffusing material (fine particles) such as silica or calcium carbonate to at least one of the inner surface and the outer surface of the light transmitting cover 20 There is. As the other light diffusion portion, a lens structure provided at least either inside or outside of the translucent cover 20, or a recess or a convex formed at least one of the inner surface and the outer surface of the translucent cover 20 There is a department. For example, by printing a dot pattern on at least one of the inner surface and the outer surface of the translucent cover 20 or processing a part of the translucent cover 20, a light diffusing function (light It is also possible to have a diffusion section). In addition, the translucent cover 20 can be provided with a light diffusing function (light diffusing portion) by molding the translucent cover 20 itself using a resin material or the like in which a light diffusing material is dispersed. Moreover, as shown to FIG. 3B, you may use the translucent cover 20 whose cross-sectional shape is a polygon. By making the cross-sectional shape of the translucent cover 20A into a polygonal shape, it is possible to further provide a diffusion function. Thereby, wide light distribution can be realized.

[Base]
The base 30 is a long rectangular plate-like support base for holding (supporting) the LED module 50 and is configured to cover the main opening 20 a of the light-transmissive cover 20 so as to cover the light-transmissive cover 20. Integrated with The base 30 has substantially the same length as the entire length of the light transmitting cover 20 in the longitudinal direction (tube axis direction). The translucent cover 20 may be fixed to the base 30 by an adhesive or the like.

In the base 30, one surface (surface) is a mounting surface for mounting the LED module 50, and is covered with the light transmitting cover 20. The other surface (rear surface) of the base 30 is exposed to the outside of the lamp, and constitutes the outer surface of the lamp housing.

A recess 31 extending in the longitudinal direction of the base 30 is formed on the surface of the base 30, and the opening of the recess 31 is covered by the diffusion member 40. The LED module 50 is provided in the recess 31 covered by the diffusion member 40, specifically, on the flat bottom surface of the recess 31. A step portion 33 extending in the longitudinal direction of the base 30 is formed on side walls on both sides of the recess 31 sandwiching the LED module 50, and the diffusion member 40 is provided on the step portion 33.

A groove (slide) extending in the longitudinal direction of the base 30 at the end in the width direction of the base 30 (the end of the surface of the base 30 in the direction substantially orthogonal to the tube axis) on the back surface of the base 30 Rails 32 are formed. The translucent cover 20 is slidably attached to the base 30 by inserting the circumferential end 21 into the groove 32. Therefore, the translucent cover 20 covers not only the surface of the base 30 but also a part of the end surface of the base 30 in the short direction. The groove 32 of the base 30 may be configured to fit with the circumferential end 21 of the translucent cover 20.

The base 30 also functions as a heat sink (heat sink) for radiating the heat generated in the LED module 50. Therefore, the base 30 is preferably made of a high thermal conductivity material such as metal, and a long aluminum substrate made of aluminum can be used as the base 30. The base 30 may be made of resin.

In addition, the inner surface of the recess 31 of the base 30 may be coated with a reflective film material. For example, the reflecting surface can be formed by coating the entire surface of the base 30 with a white resin and a metal film. Other surface finishes can also form the reflective surface. As described above, by forming a reflection surface on the inner surface of the recess 31 of the base 30, the light emitted from the LED module 50 can be reflected to the translucent cover 20 side by the reflection surface, and the light of the lamp 10 is taken out. Efficiency can be improved.

In addition, although the recess 31 is formed continuously on the surface of the base 30 in the longitudinal direction of the base 30, it may be provided intermittently. For example, the recess 31 may not be provided in a portion where the diffusion member 40 is not provided.

[Diffusion member]
The diffusion member 40 is a long rectangular diffusion plate for diffusing light from the LED module 50, and is provided in the recess 31 of the base 30 so as to cover the upper side of the LED module 50. A translucent cover 20 covers the upper side of the surface (front surface) opposite to the surface (back surface) of the diffusion member 40 facing the LED module 50. The diffusion member 40 is configured to have uniform values along the longitudinal direction and the short direction of the base 30 with respect to the diffusion coefficient of the LED module 50 with respect to light.

The diffusion member 40 is formed of a translucent material that transmits the light from the LED module 50 to the translucent cover 20. The diffusion member 40 may be configured to include a light diffusion portion having a light diffusion function for diffusing light from the LED module 50 using, for example, a transparent resin material or glass made of acrylic or the like as a base material. it can. Examples of the light diffusion portion include a light diffusion sheet or a light diffusion film formed on at least one of the front surface and the back surface of the base material (the diffusion member 40). Specifically, there is a milky white light diffusion film formed by attaching a resin containing a light diffusion material (fine particles) such as silica or calcium carbonate or a white pigment to at least one of the front surface and the back surface of the substrate. As other light diffusion parts, there are a lens structure provided on at least one of the inside and the outside of the base, or a concave or a convex formed on at least one of the front and back sides of the base. For example, by printing a dot pattern on at least one of the front surface and the back surface of the substrate or processing a part of the substrate, the substrate can also have a light diffusion function (light diffusion portion). . In addition, by forming the base material itself using a resin material or the like in which a light diffusing material is dispersed, the base material can also have a light diffusing function (light diffusing portion). The diffusion member 40 can also be made of the same material as the translucent cover 20.

[LED module]
The plurality of LED modules 50 are light sources of the lamp 10, and are mounted side by side in the longitudinal direction of the base 30 in the recess 31 of the base 30 so as to be overlapped and covered by the translucent cover 20 and the diffusion member 40. It is done. Each of the plurality of LED modules 50 is fixed to the base 30 by an adhesive, a screw or the like. The detailed configuration of the LED module 50 will be described later.

[Cap]
The pair of caps 60 have a substantially bottomed cylindrical shape, and form the outer surface of the lamp housing, and both ends of the integrated translucent cover 20 and the base 30 (both ends in the tube axial direction Section). And a pair of nozzle | cap | die 60 is covering the opening of the both ends (both-ends of the tube axial direction) of the cylindrical member formed by integrating the translucent cover 20 and the base 30. As shown in FIG. The base 60 on one side of the cylindrical member is provided with a pair of power reception pins 61, and the base 60 on the other side is provided with an earth pin 62.

The pair of power receiving pins 61 is a conductive pin made of a rod-like metal material. The pair of power receiving pins 61 is configured to be attached to the lighting fixture, and receives power for lighting the LED 53 of the LED module 50 from a power supply device (lighting fixture) outside the lamp. DC power is supplied to the lighting circuit in the lamp through the pair of power receiving pins 61. The lighting circuit rectifies the input DC power and outputs a desired voltage for energizing the LED 53.

The earth pin 62 is a conductive pin made of a rod-like metal material. Similarly to the power receiving pin 61, the earth pin 62 is configured to be attached to the lighting apparatus. Therefore, if the connection portion (connection portion in the socket) with the ground pin 62 in the lighting apparatus is a ground terminal, the grounding pin 62 is at the ground potential when the lamp 10 is mounted on the lighting apparatus.

In the case where the lamp 10 is attached to the existing fluorescent lamp, the lamp and the ground pin 62 are not connected to ground, and the ground pin 62 is a mounting for attaching the lamp 10 to the lamp. Act as a pin. Therefore, the ground pin 62 does not have to be made of metal. Further, the number of earth pins 62 is not limited to one, and may be two.

As described above, the lamp 10 adopts the one-side power feeding system, and the power for lighting the LED module 50 is fed from the pair of power receiving pins 61 provided only at one end of the lamp 10 Is configured.

Next, the configuration of the LED module 50 will be described using FIGS. 4A and 4B.

FIG. 4A is a plan view (top view) showing the configuration of the LED module 50, and FIG. 4B is a cross-sectional view of the LED module 50 taken along the line A-A 'of FIG. 4A.

The LED module 50 is a COB (Chip On Board) type light emitting module as shown in FIGS. 4A and 4B, and is a linear light source that emits light in a linear manner. The LED module 50 includes a mounting substrate 52, a plurality of LEDs 53 arranged on the mounting substrate 52, a sealing member 51 for sealing the LEDs 53, a wire 54, an electrostatic protection element 55, and an electrode terminal 56. And a wire 57 such as a gold wire.

The mounting substrate 52 is an LED mounting substrate for mounting the LED 53, and is, for example, a long rectangular substrate. The mounting substrate 52 is made of, for example, a glass composite substrate (CEM-3 or the like), a glass epoxy substrate (FR-4 or the like), a substrate (FR-1 or the like) made of paper phenol or paper epoxy, or polyimide or the like. Flexible substrate can be used. As a metal base substrate, an aluminum alloy substrate, an iron alloy substrate, a copper alloy substrate, etc. can be used, for example.

Assuming that the length in the longitudinal direction (long side length) of the mounting substrate 52 is L1 (mm) and the length in the short side direction (length of the short side) is L2 (mm), for example, as the mounting substrate 52 A substrate having a thickness of 1.0 (mm) can be used with L1 = 580 mm, L2 = 16 mm.

Each of the plurality of LEDs 53 is an example of a light emitting element, and is directly mounted on the mounting substrate 52. The plurality of LEDs 53 are arranged in a line (in a straight line) in a line along the longitudinal direction of the mounting substrate 52. Each LED 53 is a bare chip that emits monochromatic visible light, and is die-bonded onto the mounting substrate 52 by a die attach material (die bonding material). As each LED 53, for example, a blue LED chip that emits blue light can be used. As the blue LED chip, for example, a gallium nitride-based semiconductor light emitting device having a center wavelength of 440 nm to 470 nm, which is made of an InGaN-based material, can be used.

In the plurality of LEDs 53, a p-side electrode and an n-side electrode for supplying current are formed on the top surface of the chip, and the p-side electrode and the n-side electrode are wire-bonded to the wiring 54 by the wire 57. .

The sealing member 51 is a phosphor-containing resin containing a phosphor that is a light wavelength converter, and wavelength-converts the light from the LEDs 53, and collectively seals all the LEDs 53 on the mounting substrate 52. Protect. The sealing member 51 has a substantially semicircular dome shape with an upward convex cross section, and is formed linearly along the arrangement direction of the LEDs 53 so as to cover all the LEDs 53 on the mounting substrate 52.

The linear (striped) sealing member 51 is formed closer to one long side than a straight line passing the center of the mounting substrate 52 in the short direction. Furthermore, the sealing member 51 is formed without interruption from the end face of one short side of the mounting substrate 52 to the end face of the opposite short side. As the sealing member 51, for example, when the LED 53 is a blue LED, it is possible to use a phosphor-containing resin in which yellow phosphor particles of YAG (yttrium aluminum garnet) type are dispersed in a silicone resin. In this case, since the yellow phosphor particles are excited by the blue light of the blue LED to emit yellow light, white light is emitted from the sealing member 51 by the excited yellow light and the blue light of the blue LED. . The sealing member 51 may also contain a light diffusing material such as silica.

The wiring 54 is a metal wiring made of tungsten (W) or copper (Cu) or the like, and is pattern-formed in a predetermined shape in order to electrically connect the plurality of LEDs 53 to each other. Further, the wiring 54 is formed so as to electrically connect the plurality of LEDs 53 and the electrostatic protection element 55 and to be electrically connected also to the electrode terminal 56.

The electrostatic protection element 55 is, for example, a zener diode, and prevents the LED 53 having a low reverse withstand voltage from being destroyed by static electricity of the reverse polarity generated on the mounting substrate 52.

The electrode terminal 56 is a power supply / reception unit (external connection terminal) that receives DC power from the outside and supplies DC power to the LED 53, and is electrically connected to the wiring 54. The direct current voltage received by the electrode terminal 56 is supplied to the LED 53, whereby the LED 53 emits light, and the LED 53 emits desired light. The two electrode terminals 56 are offset to one long side of the mounting substrate 52 with reference to the sealing member 51. The element row of the LED 53 and the sealing member 51 are provided to pass through the center of the mounting substrate 52 in the width direction, and two electrode terminals 56 are provided on the opposite long side of the mounting substrate 52 via the sealing member 51. You may form in each.

In the LED modules 50 adjacent to each other, the electrode terminals 56 are electrically connected by connection wiring (not shown). Thereby, a plurality of LED modules 50 (LEDs 53) are connected in series. The connection wiring that connects the electrode terminals 56 to each other can be made of, for example, a conductive member such as a lead wire made of a conductive wire coated with an insulating film.

In the manufacture of the lamp 10 having the above configuration, first, the LED module 50 is disposed on the surface of the base 30, and then the diffusion member 40 is disposed. After both end portions 21 of the translucent cover 20 in the circumferential direction are inserted into and hooked in the grooves 32 on both end surfaces of the base 30 in the lateral direction, the translucent cover 20 is inserted in the grooves 32. The translucent cover 20 is attached to the base 30 by sliding in the tube axis direction. And the nozzle | cap | die 60 is attached to the both ends of the pipe axis direction of the base 30 and the translucent cover 20 which were integrated. The translucent cover 20 may be fitted on the base 30 so as to be pushed from above the base 30 without sliding.

As described above, the lamp 10 of the present embodiment is a long lamp, and the LED module 50 including the LED 53 and the mounting substrate 52 on which the LED 53 is provided, and the recess 31 in which the LED module 50 is provided. And a long base 30 formed on the surface. The lamp 10 further includes an elongated translucent cover 20 configured to cover the LED module 50, and the LED module 50 and the translucent cover 20 so as to be positioned inside the recess 31. And a diffusion member 40 provided to diffuse the light emitted from the LED 53.

With such a configuration, the diffusion member 40 can be disposed in the vicinity of the LED module 50, and much of the light emitted from the LED module 50 can be diffused and guided to the light transmitting cover 20, so that unevenness in luminance can be suppressed. Can. Moreover, since the LED module 50 is provided in the recessed part 31 of the base 30, size reduction of the lamp | ramp 10 can also be implement | achieved.

Further, in the lamp 10 of the present embodiment, the step 33 is formed on the side wall of the recess 31 of the base 30, and the diffusion member 40 is plate-like and covers at least a part of the opening of the recess 31 of the base 30. Is mounted on the step portion 33 in the same manner.

With such a configuration, since the diffusion member 40 can be disposed on the base 30 simply by placing the plate-like diffusion member 40 on the step portion 33, installation of the diffusion member 40 can be facilitated. Can. Further, since the diffusion member 40 is plate-like, processing for giving the diffusion function to the diffusion member 40 is easy, so that the diffusion member 40 can have a desired diffusion function.

Further, in the lamp 10 of the present embodiment, the base 30 is made of metal, and the diffusion member 40 is in contact with the base 30.

With such a configuration, even when the heat of the LED module 50 is transmitted to the diffusion member 40 and the temperature of the diffusion member 40 rises, the heat of the diffusion member 40 can be dissipated to the base 30, so the heat diffusion member Warpage of 40 can be suppressed.

Further, in the lamp 10 of the present embodiment, the translucent cover 20 is a cutaway cylindrical member having a main opening 20a obtained by cutting out a part of a long cylinder along the long direction, and the base 30 is The translucent cover 20 is held so as to close the main opening 20a.

With such a configuration, a part of the base 30 is exposed to the outer surface as a part of the lamp casing, so the heat of the LED module 50 can be efficiently dissipated to the outside of the lamp through the base 30.

Further, in the lamp 10 of the present embodiment, the base 30 is formed with a groove 32 for slidably holding the translucent cover 20.

With such a configuration, the light-transmissive cover 20 can be easily attached to the base 30, so that the manufacture of the lamp 10 can be facilitated.

Moreover, in the lamp | ramp 10 of this embodiment, the translucent cover 20 is comprised from glass or resin, and diffuses the light emitted from LED53. That is, the light transmitting function is given to the light transmitting cover 20.

With such a configuration, the light of the LED module 50 can be diffused not only by the diffusion member 40 but also by the light-transmissive cover 20, so that unevenness in luminance can be further suppressed.

In the lamp 10 of the present embodiment, the diffusion member 40 is configured to have different values for the light diffusion rate of the LED module 50 along at least one of the longitudinal direction and the lateral direction of the base 30. May be For example, the diffusion member 40 has a high diffusion rate above the portion where the LED 53 of the mounting substrate 52 is provided (the LED upper portion), and above the portion where the LED 53 is not provided of the mounting substrate 52 (the LED non-upper portion) The diffusion rate may be low. In such a configuration, in the diffusion member 40, the base material has a light diffusing function only in the upper part of the LED, or the upper part of the LED contains more light diffusion material in the base than the non-upper part of the LED, etc. It can be realized.

Moreover, in the lamp | ramp 10 of this embodiment, the spreading | diffusion member 40 may be partially provided only in LED upper part, and may not be provided above LED non-upper part.

Moreover, in the lamp 10 of the present embodiment, when the diffusing member 40 can obtain a sufficient effect on the light diffusing function of the LED module 50, the translucent cover 20 may not include the light diffusing portion.

(Modification 1)
Next, a first modification of the lamp according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 5 is an enlarged perspective view of a part (an end in the tube axis direction) of the lamp 10A of the present modification with the base 60 removed.

The lamp 10A of this modification is, as shown in FIG. 5, first in that the diffusion member 40 is provided on the base 30 so as to be located above the recess 31 instead of inside the recess 31. It differs from the lamp 10 of the embodiment. Specifically, the lamp 10A of the present modification differs from the lamp 10 of the first embodiment in that the diffusion member 40 is provided on the surface of the base 30 so as to cover the opening of the recess 31. .

With such a configuration, there is no need to provide a step portion for mounting the diffusion member 40 on the side wall of the recess 31 of the base 30, so processing of the base 30 can be facilitated. Therefore, the manufacture of the lamp 10A can be facilitated.

(Modification 2)
Next, a second modification of the lamp according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 6 is an enlarged perspective view of a part (an end in the tube axis direction) of the lamp 10B of the present modification with the base 60 removed.

In the lamp 10B of this modification, as shown in FIG. 6, the recess 31 of the base 30 has a tapered shape that spreads toward the opening, and the side surface of the recess 31 of the base 30 is inclined with respect to the bottom of the recess 31. And the lamp 10 of the first embodiment.

With such a configuration, the light of the LED module 50 can be reflected toward the opening of the recess 31 by the side surface of the recess 31 of the base 30, so that the light extraction efficiency of the lamp 10B can be improved. The light distribution of the light of the LED module 50 can also be controlled by adjusting the inclination angle of the side surface of the recess 31 of the base 30.

(Modification 3)
Next, a third modification of the lamp according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 7 is an enlarged perspective view of a part (an end in the tube axis direction) of the lamp 10C of the present modification with the base 60 removed.

As shown in FIG. 7, the lamp 10 </ b> C of this modification is a resin according to the first embodiment in that the diffusion member 40 is a resin and is provided in the recess 31 of the base 30 so as to contact the LED 53. It is different.

With such a configuration, the diffusion member 40 can be provided so as to surround the entire circumference of the LED 53. Therefore, most of the light of the LED 53 can be diffused and guided to the light transmitting cover 20, so that the uneven brightness can be further suppressed.

In addition, since it is not necessary to provide the side wall of the recess 31 of the base 30 with the step for mounting the diffusion member 40, processing of the base 30 can be facilitated. Therefore, the manufacture of the lamp 10C can be facilitated.

(Modification 4)
Next, a fourth modification of the lamp according to the first embodiment of the present invention will be described with reference to FIGS.

FIG. 8 is a perspective view showing the configuration of the lamp 10D of this modification with the translucent cover up. 9 is an exploded perspective view of the lamp 10D in a state where the base 60 is removed, and FIG. 10 is a part of the lamp 10D (end in the tube axial direction) in a state where the base 60 is removed. It is a perspective view which expanded.

In the lamp 10D of this modification, as shown in FIGS. 8 to 10, a groove 32 extending in the longitudinal direction of the base 30 is formed not on the back surface of the base 30, but on the end face of the base 30 in the short direction. And the lamp 10 of the first embodiment.

With such a configuration, the entire rear surface of the base 30 can be exposed to the outer surface as a lamp housing, so the heat of the LED module 50 can be dissipated to the outside of the lamp with high efficiency through the base 30. .

(Modification 5)
Next, a fifth modification of the lamp according to the first embodiment of the present invention will be described with reference to FIGS.

FIG. 11 is a perspective view showing the configuration of the lamp 10E of the present modification with the translucent cover up. 12 is an exploded perspective view of the lamp 10E in a state where the base 60 is removed, and FIG. 13 is a part of the lamp 10E (end in the tube axial direction) in a state where the base 60 is removed. It is a perspective view which expanded.

In the lamp 10E of this modification, as shown in FIGS. 11 to 13, a groove 32 extending in the longitudinal direction of the base 30 is formed not on the back surface of the base 30 but on the surface of the base 30. It differs from the lamp 10 of the first embodiment.

With such a configuration, it is possible to expose the entire end surface and back surface of the base 30 in the short direction to the outer surface as a lamp housing, so that the heat of the LED module 50 is efficiently transferred to the outside of the lamp through the base 30. Can dissipate heat.

(Modification 6)
Next, a sixth modification of the lamp according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 14 is an enlarged perspective view of a part (an end in the tube axis direction) of the lamp 10F of this modification with the base 60 removed.

In the lamp 10 shown in FIG. 3A, the lamp 10F of the present modification includes a diffusion member 40F in place of the sealing member 51 and a phosphor layer 70 in place of the diffusion member 40 in the lamp 10 shown in FIG. 3A.

The diffusion member 40F is made of, for example, a translucent resin, and is formed to seal the LED 53. The diffusion member 40F has a light diffusion function. For example, the diffusing member 40F can be made to have a diffusing function by containing light diffusing fine particles in the light transmitting resin, or by providing fine asperities on the surface of the light transmitting resin.

The phosphor layer 70 is a remote phosphor and is provided at a distance from the LED 53. The phosphor layer 70 is, for example, a phosphor plate including a phosphor that performs wavelength conversion of the light of the LED 53.

As described above, by separating the phosphor layer 70 from the LED 53 (light emitting unit), it is possible to suppress a decrease in conversion efficiency of the phosphor due to a temperature rise.

In addition, in this modification, you may use the surface mounting (SMD: Surface Mount Device) type LED element which does not have fluorescent substance containing resin (phosphor layer) as LED53.

(Modification 7)
Next, a seventh modification of the lamp according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 15 is an enlarged perspective view of a part (an end in the tube axis direction) of the lamp 10G of this modification with the base 60 removed.

In the lamp 10 shown in FIG. 3A, as shown in FIG. 15, the lamp 10G of this modification is provided with a phosphor layer 70G in place of the diffusion member 40 and the sealing member 51, and in place of the translucent cover 20. A translucent cover 20G is provided.

The phosphor layer 70G is configured such that a part of the long elliptical cylinder is cut out along the long direction (the tube axis direction), and for example, the cross-sectional shape is a half long vertical ellipse. Be done. The phosphor layer 70 </ b> G is provided to cover the LEDs 53 so as to be separated from the LEDs 53. The phosphor layer 70 </ b> G includes a phosphor that performs wavelength conversion of the light of the LED 53. Thus, the light distribution angle can be expanded by making the cross-sectional shape of the phosphor layer 70G into a vertically long semi-elliptic shape.

The translucent cover 20G is configured such that a part of the long elliptical cylinder is cut out along the long direction (the tube axis direction), and for example, the cross-sectional shape is a half long vertical ellipse. It is configured. The cross-sectional shape of the translucent cover 20G and the cross-sectional shape of the phosphor layer 70G can be similar. Thus, a light distribution angle can be expanded by making the cross-sectional shape of translucent cover 20G into a longitudinally long semi-elliptic. The translucent cover 20G can be made of the same material as the translucent cover 20.

Thus, a lamp with a wide light distribution angle can be realized by making the cross-sectional shape of each of the phosphor layer 70G and the translucent cover 20G into a vertically long semi-elliptic shape.

Although in FIG. 15 there is a space area between the phosphor layer 70G and the LED 53, this space area may be filled with a translucent material such as a transparent resin.

Further, in the present modification, at least one of the translucent cover 20G and the phosphor layer 70G functions as a diffusion member.

For example, when the translucent cover 20G is made to function as a diffusion member, the diffusion function is made to the translucent cover 20G by containing the light diffusion material, performing asperity processing as described above, or making the cross-sectional shape polygonal. Can be

In addition, in the case of causing the phosphor layer 70G to function as a diffusion member, for example, the light diffusion material may be contained in the phosphor layer 70G. The fluorescent layer 70G can also have a diffusion function by forming an uneven shape on the inner surface or the outer surface of the fluorescent layer 70G.

Second Embodiment
Next, an example in which the lamp according to the first embodiment of the present invention is applied to a lighting device will be described using FIG.

FIG. 16 is a perspective view showing a configuration of a lighting device according to a second embodiment of the present invention.

The illuminating device 100 which concerns on this embodiment is equipped with the lamp 10 which concerns on the said 1st Embodiment, and the lighting fixture 110, as shown in FIG. Such a lighting device 100 is mounted on a ceiling or the like via a fixture.

The lighting fixture 110 is electrically connected to the lamp 10, and includes a pair of sockets 120 for holding the lamp 10, a fixture body 130 to which the socket 120 is attached, and a circuit box (not shown). The inner surface of the instrument body 130 is a reflective surface 131 that reflects the light emitted from the lamp 10 in a predetermined direction (downward in FIG. 16). Note that the circuit box accommodates therein a lighting circuit that supplies power to the lamp 10 when the switch outside the figure is on, and does not supply power when the switch is off.

As described above, since the lighting device 100 according to the present embodiment uses the lamp 10 according to the first embodiment, it is possible to suppress uneven brightness. In addition, you may use the lamp | ramp of each modification of 1st Embodiment.

As mentioned above, although the lamp | ramp and illuminating device which concern on this invention were demonstrated based on embodiment, this invention is not limited to these embodiment. It is within the scope of the present invention to apply various modifications that those skilled in the art would think within the scope of the present invention. In addition, the components in the plurality of embodiments may be arbitrarily combined without departing from the spirit of the invention.

For example, in the above embodiment and modification, an LED is exemplified as a light emitting element, but a semiconductor light emitting element such as a semiconductor laser, or an EL element such as organic EL (Electro Luminescence) or inorganic EL, or other solid light emitting elements You may use.

In the embodiment and the modification, the feeding method is the one-sided feeding method. However, the both ends of the base may be the power feeding pins. In this case, the power receiving pin on one side and the power receiving pin on the other side may be set to one pin, and the power receiving pin on one side and the power receiving pin on the other side both receive AC power from both sides as a pair of power receiving pins. Any configuration may be used. Further, the pair of power receiving pins and the ground pins are not limited to rod-like metal, and may be made of flat plate metal or the like.

Further, in the above embodiment and the modification, the one-pin-two-pin base structure in which one of the two bases 60 is one pin (one pin) and the other is two pins (two pins) is used. A two-pin / two-pin base structure may be employed in which each of the two bases 60 has two pins (two pins). In addition, a G13 base can be used as a two-pin base. Further, as the base 60, it is also possible to use an L-shaped pin base of a straight tube type LED lamp conforming to JEL 801 standardized by the Japan Light Bulb Industry Association.

Moreover, in the said embodiment and modification, although the nozzle | cap | die 60 was comprised so that direct current power might be received, you may comprise so that alternating current power may be received. When the base 60 receives AC power, the lighting circuit built in the lamp 10 includes a circuit for converting AC power to DC power.

Moreover, in said embodiment and modification, although the LED module set it as the structure of the COB type which mounted LED on a board | substrate directly, it does not restrict to this. For example, using an SMD type LED element in which an LED chip is mounted in a cavity (concave portion) of a resin-molded container and the phosphor-containing resin is sealed in the cavity, the SMD type LED element is used as a light emitting element You may use the LED module comprised by mounting two or more on a board | substrate.

Moreover, in the said embodiment and modification, although three LED modules are provided in the lamp | ramp, it does not restrict to this. For example, one LED module may be provided. In addition, the length and the shape of the mounting substrate of the LED module, or the number of LEDs to be mounted may be appropriately changed.

Moreover, in the said embodiment and modification, although the translucent cover was comprised by substantially semi-cylindrical shape, it does not restrict to this. For example, the translucent cover may have a cylindrical shape in which the main opening is not formed. In this case, at least one end of the translucent cover needs to be an open end opening. For example, the base is mounted with a diffusion member, an LED module, a lighting circuit, etc., and electrical connection is also completed. Then, it is inserted from the end opening of the translucent cover and accommodated in the translucent cover.

Moreover, in the said embodiment and modification, although the sealing member carried out package sealing of all LED on a mounted substrate, it does not restrict to this. For example, a plurality of sealing members may be provided in an island shape on one mounting substrate, and each of the plurality of sealing members may individually seal one or more LEDs. In this case, since the luminance unevenness is likely to occur, the effect of the luminance unevenness suppression by the diffusion member becomes remarkable.

INDUSTRIAL APPLICABILITY The present invention is useful as a lamp using a light emitting element such as an LED, for example, a straight tube lamp, and can be widely used in a lighting apparatus and the like provided with the lamp.

10, 10A, 10B, 10C, 10D, 10E, 10G,

lamps

20, 20A, 20G translucent cover 21 end 30 base 31 recess 32 groove 33

step

40, 40F diffusion member 50 LED module 51 sealing member 52 Mounting board 53 LED
54 Wiring 55 Electrostatic Protection Element 56 Electrode Terminal 57 Wire 60 Base 61 Power Receiving Pin 62

Arspin

70, 70G Phosphor Layer 100 Lighting Device 110 Lighting Fixture 120 Socket 130 Device Body 131 Reflective Surface

Claims

It is a long lamp,
A light emitting module having a light emitting element and a substrate provided with the light emitting element;
An elongated base on which a concave portion provided with the light emitting module is formed;
An elongated translucent cover configured to cover the light emitting module;
A lamp comprising: a diffusion member provided between the light emitting module and the light transmitting cover so as to be located inside the recess or above the recess, and diffusing the light emitted from the light emitting element.
A stepped portion is formed on the side wall of the recess of the base,
The lamp according to claim 1, wherein the diffusion member has a plate shape and is placed on the stepped portion so as to cover at least a part of the opening of the recess of the base.
The lamp according to claim 1, wherein the diffusion member is a resin, and is provided in the recess so as to be in contact with the light emitting element.
The diffusion member has a high diffusivity above the portion of the substrate provided with the light emitting element, and has a low diffusivity above the portion of the substrate where the light emitting element is not provided. Or the lamp described in paragraph 1.
The lamp according to any one of claims 1 to 4, wherein the side surface of the recess of the base reflects light emitted from the light emitting element toward the opening of the recess.
The base is made of metal,
The lamp according to any one of claims 1 to 5, wherein the diffusion member is in contact with the base.
The translucent cover is a cutout cylindrical member having a main opening in which a part of an elongated cylinder is cut out in a longitudinal direction,
The lamp according to any one of claims 1 to 6, wherein the base holds the translucent cover so as to close the main opening.
The lamp according to claim 7, wherein a groove for slidably holding the light transmitting cover is formed on the base.
The lamp according to any one of claims 1 to 8, wherein the light transmitting cover is made of glass or resin and diffuses light emitted from the light emitting element.
A lighting device comprising the lamp according to any one of claims 1 to 9.