JP2013175372A - Led fluorescent illumination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED fluorescent illumination apparatus capable of simplifying a manufacturing process and attaining cost reduction and enlarging a light distribution angle toward a mounting fixture side (a ceiling surface, a wall surface or the like) and being eye-friendly as it is close to natural light.SOLUTION: In the LED fluorescent illumination apparatus 1 including a heat sink 6 for radiating heat generated from a substrate 4, the substrate 4 having a turn-on circuit retained on the heat sink 6, a flat-plate shaped LED light-source unit 3 arranged on a front face of the substrate 4, and a cover housing the heat sink 6, the substrate 4, and the LED light-source unit 3 and made of a translucent material, a light guide and diffusion body 5 applying uneven treatment on its surface and made from the light-transmitting material is also included. The light guide and diffusion body 5 is processed in a shape wherein the light emitted from the LED light source section 3 is diffusely reflected with unevenness on a surface formed with the uneven treatment in the light guide and diffusion body 5 and the diffusely reflected light is further reflected.

Description

  The present invention provides a light distribution diffuser having a wide range of light distribution by providing a light guide diffuser made of a translucent material and having a concavo-convex process and a heat sink that is miniaturized to approximately the same size as the light guide diffuser. It is related with the made LED fluorescent lighting apparatus.

The LED light source fluorescent lamp has been attracting attention as an illumination device that replaces the conventional fluorescent lamp because it has excellent characteristics such as energy saving, CO ₂ reduction, and mercury-free use. However, since the light of the LED is straight, there is no reflection from the lamp or ceiling like a conventional fluorescent lamp, so the portion directly under the LED fluorescent lighting device is illuminated brightly, but there is a portion where the light is not illuminated, There is a problem that it is dazzling because it is not direct light but direct light.

  As a technique for solving this problem, a technique disclosed in Patent Document 1 is known. The technique disclosed in Patent Document 1 is to arrange two LED light source substrates 102 in a LED light source fluorescent lamp so as to be back to back and to provide a power source outside, thereby widening the irradiation angle. (See Patent Document 1)

  In this conventional LED fluorescent lighting device 101, two LED light source substrates 102 are required, and the number of light sources corresponding to the two LED light source substrates 102 is required. Since each of the light from the LED light source substrates 102 irradiates only the front side, the portions that are not irradiated appear as black lines, which gives the user a feeling of strangeness.

  For this reason, various LED fluorescent lighting apparatuses capable of expanding the irradiation range with a small number of light sources have been proposed. For example, in the LED fluorescent lighting device 201 of Patent Document 2, the inside of the tube body 202 is crossed by the inner wall 203 with the first tube body portion 204 made of a translucent synthetic resin or the like and also the LED light emitting illumination room, and the crossing made of metal. It is divided into the second tubular body part 205 which is a circular arc shape in a plan view and which is also the power supply chamber B. Inside the tubular body 202, an inner wall 203 having a horizontal plane and a pair of inclined surfaces is positioned such that the horizontal plane is closer to the second tubular body portion 205 than the center of the tubular body 202, and is placed on the upper surface of the horizontal plane of the inner wall 203. The LED light emitting device 206 and the phosphor 207 are provided, the power circuit 208 is provided on the lower surface of the horizontal plane, and the light guide diffuser 209 is provided on the inclined surface.

  According to this LED fluorescent lighting device 201, an inner wall 203 having a horizontal plane and a pair of inclined surfaces is connected to both ends of the horizontal plane with the end edges of the second metal tube portion 205, and the inner wall 203 and the metal Of the inner wall 203 is equipped with the LED light emitting device 206 and the phosphor 207 on the upper surface of the inner wall 203, the power circuit 208 is installed on the lower surface of the horizontal surface, and is led to the inclined surface. Equipped with the light diffuser 209, the irradiation range can be expanded to the mounting surface side by irregularly reflecting the fluorescent light from the substantially entire surface of the inner wall 203 within the first tubular portion 204, which is the LED light emitting illumination chamber A. .

JP 2010-262909 A JP 2010-272496 A

  However, in the conventional LED fluorescent lighting device 201, it is necessary to emit light from the LED light source toward the first tube portion 204 and re-reflect the reflected light from the first tube portion 204 by the light guide diffuser 209. In order to re-reflect the reflected light, the light guide diffuser 209 having a three-layer structure must be bonded to the inclined surface of the inner wall 203 using aluminum foil, which makes the manufacturing process complicated and costly. There was a problem that would be high.

  In addition, the first tube portion 204 that is the LED light emitting illumination chamber A and the second tube portion 205 that is the power supply chamber B equipped with the power supply circuit 208 are blocked by the inner wall 203, and there are places that are not irradiated. It existed in a range exceeding 90 degrees.

  Therefore, the problem to be solved by the present invention is that the manufacturing process can be simplified and the cost can be reduced, the light distribution angle can be expanded to the fixture side (ceiling surface, wall surface, etc.), and close to natural light and friendly to the eyes. An LED fluorescent lighting device is provided.

  This invention was made in order to solve the said subject, The LED fluorescent lighting apparatus of Claim 1 hold | maintains the board | substrate which has a lighting circuit, The heat sink which thermally radiates the heat | fever which generate | occur | produces in a board | substrate, A lighting circuit LED fluorescent lighting comprising: a substrate having a flat plate-like LED light source unit provided on the front surface of the substrate; and a cover made of a light-transmitting material that accommodates the heat sink, the substrate, and the LED light source unit The apparatus comprises a light guide diffuser made of a translucent material having an uneven surface processed on the surface, and the light guide diffuser has the light emitted from the LED light source part inside the light guide diffuser. It is characterized by being irregularly reflected by the unevenness of the surface formed by the unevenness processing and processed into a shape that is optically designed so that the irregularly reflected light is further reflected.

  According to the LED fluorescent illumination device according to claim 1, the light guide diffuser is made of a translucent material, subjected to an uneven processing treatment, and an uneven surface is added, so that the light is incident from the LED light source unit. The transmitted light passes through the inside of the light guide diffuser and is irregularly reflected by the irregularities on the surface. And since the light guide diffuser is processed into an optically designed shape so that the irregularly reflected light is further reflected, the light reflection is chained and the light from the LED light source unit can be diffused in multiple directions.

  The LED fluorescent lighting device according to claim 2 is characterized in that, in claim 1, organic electroluminescence is used for the LED of the LED light source section.

  According to the LED fluorescent lighting device according to claim 2, in addition to the effect of claim 1, by using organic electroluminescence (hereinafter referred to as organic EL) for the LED light source part, the luminous efficiency is high, but heat is generated. In addition, since the organic EL itself emits light, the voltage can be kept low and the power consumption can be reduced.

  According to a third aspect of the present invention, there is provided the LED fluorescent lighting device according to the first or second aspect, wherein the cover is a long fluorescent lamp-like tube, and the heat sink, the substrate, and the LED light source unit are long. The LED light source units are arranged in a line in the longitudinal direction of the tube on the substrate.

  According to the LED fluorescent lighting device of claim 3, the cover is a long fluorescent lamp-like tube, the heat sink and the substrate and the LED light source unit are also long, and the LED light source unit is on the substrate. Since they are arranged in a line in the longitudinal direction of the tubular body, a conventional fluorescent lamp can be used as an illumination device that exhibits the effect of claim 1 or claim 2.

  The LED fluorescent lighting device according to claim 4 is the LED light source unit according to claim 3, wherein the concave portion of the light guide diffuser is provided so as to face the front surface of the LED light source unit. The light receiving surface is configured to include a light receiving surface that receives the light emitted from the light source and a pair of inclined surfaces that are provided in a cross-sectional view and have a shape of a letter C in a longitudinal section.

  According to the LED fluorescent lighting device of claim 4, in addition to the effect of claim 3, the light receiving surface of the light guide diffuser is arranged so as to face the front surface of the LED light source part. The straight light characteristic of the LED can be received efficiently. In addition, the light guide diffuser has a substantially crescent shape when viewed in a longitudinal section, so that light that has been irregularly reflected in the light guide diffuser can be received by a crescent-shaped curved surface. It can irradiate a wide range from the entire surface of the crescent-shaped curved surface of the diffuser.

  The LED fluorescent lighting device according to claim 5 is the LED fluorescent lighting device according to claim 4, wherein the light guide diffuser is provided with a protruding portion (or a groove portion) extending in a longitudinal direction of the tube on each of the inclined surfaces. The heat sink is provided with a groove (or protrusion) extending in the longitudinal direction of the tubular body to be engaged with the protrusion, and the protrusion (or groove) of the light guide diffuser is the groove (or protrusion) of the heat sink. The light guide diffuser and the heat sink are fitted together by being inserted into and engaged with.

  According to the LED fluorescent lighting device of the fifth aspect, in addition to the effect of the fourth aspect, the protrusion (or groove) is provided on the inclined surface of the light guide diffuser, and the groove (or protrusion) is provided on the heat sink. As a result, the inclined surface of the light guide diffuser and the heat sink are fitted to prevent the light guide diffuser from falling in the tube, and the heat of the light guide diffuser is dissipated together with the heat of the substrate and the LED light source unit. be able to.

  According to the present invention, the manufacturing process can be simplified and the cost can be reduced, the light distribution angle can be expanded to the fixture side (ceiling surface, wall surface, etc.), and an LED fluorescent lighting device that is close to natural light and is easy on the eyes is provided. can do.

It is a longitudinal cross-sectional view of the LED fluorescent lighting apparatus which concerns on one Embodiment of this invention. It is one Embodiment of this invention, Comprising: It is a perspective view which shows the state which removed the end cap of the LED fluorescent lighting apparatus. It is a longitudinal cross-sectional view of a light guide diffuser. It is a longitudinal cross-sectional view of a heat sink. It is a front view of the LED fluorescent lighting apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the irradiation angle from a LED light source part to a light-receiving surface. It is a figure where it uses for description of the spreading | diffusion of the light from a LED light source part. It is a figure where it uses for description about the thickness of the light guide diffuser which concerns on one Embodiment of this invention, and the distance with an LED light source part. It is a graph which shows the characteristic of the light distribution angle of the LED fluorescent lighting apparatus which concerns on one Embodiment of this invention. It is a figure which shows one Embodiment of the conventional LED fluorescent lighting apparatus. It is a figure which shows other embodiment of the conventional LED fluorescent lighting apparatus.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. The present invention is applied to, for example, an LED fluorescent lighting device 1 configured as shown in FIGS.

  First, with reference to FIG.1, FIG2 and FIG.5, the outline of a structure of the LED fluorescent lighting apparatus 1 is demonstrated. As shown in FIG. 1, the LED fluorescent lighting device 1 includes a heat sink 6 that dissipates heat generated by the substrate 4, a substrate 4 that is provided so that the back surface is in close contact with the heat sink 6, and supports the LED light source unit 3, The LED light source unit 3 provided so as to be in close contact with the front surface of the substrate 4, the LED light source unit 3, the substrate 4, and the heat sink 6 are held, and the light from the LED light source unit 3 is diffused inside to externally. A light guide diffuser 5 that irradiates the light source, a heat sink 6, and a tube body 2 that houses the light guide diffuser 5 and the heat sink 6 as the LED light source unit 3 and the substrate 4; 2 includes a pair of end caps 16a and 16b provided at both ends, and support terminal portions 17a and 17b provided in the end caps 16a and 16b as main parts.

  The tube body 2 is made of a light-transmitting material such as glass or resin, and is long and partially open along the longitudinal direction as shown in FIG. 2, and has an opening edge 10a and an opening edge. 10b, the heat sink 6 is held.

  The tube 2 is a conventional fluorescent lamp in which a small amount of mercury vapor is put into a vacuumed tube to cause electricity to flow therethrough, while the light source is an LED. As long as it is hollow, it does not necessarily need to be completely sealed.

  The LED light source unit 3 is, for example, a 3 mm × 2.5 mm rectangular chip. Further, the LED light source unit 3 has a structure in which a light emitting diode chip having a wavelength of blue or shorter than that is covered with a phosphor, and emits white light. The LED light source unit 3 may be of a size that can be accommodated on the substrate 4 and is not limited to the above size. Further, the LED light source unit 3 may use an organic EL whose light emitting layer is made of an organic compound.

  A plurality of LED light source units 3 are arranged on the upper surface of the substrate 4 in a row in the longitudinal direction of the tube at an appropriate interval (or without a gap), and heat generated during light emission is transferred to the heat sink 6 via the substrate 4. Conducted and released from there.

  The board | substrate 4 has a circuit for lighting LED, for example, the wiring pattern is formed in the main body which consists of glass epoxy resins. In addition, the main body of the board | substrate 4 is good also as what has heat dissipation, such as aluminum, a ceramic, and glass.

  The substrate 4 is provided with the LED light source unit 3 mounted on the upper surface, elongated in the longitudinal direction of the tubular body, and in contact with the heat sink 6 on the back surface. Heat generated in the LED lighting circuit is released through the substrate 4 and the heat sink 6.

  The end caps 16a and 16b are provided at both ends of the tube body 2, and the same end cap as that of the straight tube fluorescent lamp is used so that the tube can be replaced with the straight tube fluorescent lamp. Each of the end caps 16a and 16b includes support terminal portions 17a and 17b similar to the terminals of the straight tube fluorescent lamp. Therefore, the LED fluorescent lighting device 1 can be mounted as it is on the socket S (not shown) of the lighting fixture corresponding to the straight tube fluorescent lamp.

  Next, the configuration of the light guide diffuser 5 will be described in detail with reference to FIGS. 1, 3, 6, 7 and 8. The light guide diffuser 5 is provided in order to diffusely reflect the light emitted from the LED light source unit 3 and expand the irradiation angle. For this reason, the shape in which the irregularly reflected light is further reflected, for example, is elongated in the longitudinal direction of the tube and processed into a substantially crescent shape in a longitudinal section view. In addition, the light guide diffuser 5 should just be a shape in which the irregularly reflected light further reflects, and is not limited to the said shape.

  The light guide diffuser 5 is provided on each of a planar light receiving surface 9 that receives light emitted from the LED light source unit 3, a pair of inclined surfaces 7a and 7b that hold the heat sink 6, and the inclined surfaces 7a and 7b. Groove portions 8a and 8b engaged with the protrusions 14a and 14b of the heat sink 6, and the curved surface portion 11 which receives light irregularly reflected in the light guide diffuser 5 by a curved surface and causes a more efficient chain of reflection. It is provided as a main part.

  The light guide diffuser 5 is made of a translucent material and is formed from a single material (acrylic is used in the embodiment) instead of a multilayer structure, so that the manufacturing process can be simplified. Manufacturing costs can be reduced. In addition, the light guide diffuser 5 should just be formed from translucent materials, such as glass and resin, and a raw material is not limited. Moreover, the light guide diffuser 5 is not limited to a lens form, and may be a film form.

  The light receiving surface 9 is formed in a flat shape, is provided so as to face the front surface of the LED light source unit 3, and the distance from the front surface of the LED light source unit 3 is 3 mm. Further, the thickness of the light guide diffuser between the light receiving surface 9 and the curved surface portion 11 is 2.4 mm.

  This is an optimum value determined based on the optical design. That is, the closer the light receiving surface 9 and the curved surface portion 11 to the front surface of the LED light source portion 3, the smaller the curvature of the curved surface portion 11 and the closer the shape is to a flat surface. This is because the curvature of the curved surface portion 11 increases and the light concentrates in the orbital direction as the distance between the light receiving surface 9 and the curved surface portion 11 increases from the front surface of the portion 3, so that the illuminance varies. .

  Since the width of the light receiving surface 9 is 120 °, which is the angle of light emitted from the LEDs on the plane, it is determined so that substantially all of the straight light emitted from the LED light source unit 3 can be received. Yes.

  The groove portions 8 a and 8 b provided on the inclined surfaces 7 a and 7 b are inserted into and engaged with the protrusions 14 a and 14 b provided on the grip portion 12 of the heat sink 6, so that the light guide diffuser 5 is fitted to the heat sink 6. Combined. The groove portions 8a and 8b may have a protruding shape, and the protruding portions 14a and 14b may have a groove shape. Moreover, about the method of engagement with the inclined surfaces 7a and 7b and the heat sink 6, slide insertion may be sufficient and you may make it fit using elastic force.

  The thickness of the light guide diffuser between the groove portions 8a and 8b and the curved surface portion 11 provided on the inclined surfaces 7a and 7b of the light guide diffuser 5 is set to 1 mm. This is an optimum value determined based on the optical design. That is, it is considered that the light irregularly reflected in the light guide diffuser reaches the fixture side (ceiling surface and wall surface) and spreads on the reflector of the lighting fixture.

  The curved surface portion 11 is shaped into a gently curved surface so that a chain of reflection of light irregularly reflected in the light guide diffuser 5 occurs. The light diffused by irregular reflection in the light guide diffuser 5 is irradiated over a wide area from the entire surface of the curved surface portion 11.

  The light guide diffuser 5 is blasted on the surface by blowing compressed air mixed with an abrasive by a compressor, and the size of the irregularities formed by the blasting is 1 μm to 1 mm. And the irregularities formed on the surface by this blasting process, the light received from the LED light source unit 3 can be irregularly reflected, and the light emission direction can be freely changed by an optical design technique. The unevenness on the surface of the light guide diffuser 5 is not limited to blasting, and may be formed by integral molding using a mold or the like.

  Next, the configuration of the heat sink 6 will be described with reference to FIGS. 1 and 4. The heat sink 6 is miniaturized to approximately the same size as the light guide diffuser 5. The heat sink 6 accommodates the LED light source unit 3 and the substrate 4 and protrudes inward of the tube body 2. Recesses 13a, 13b located on both sides of the projection, protrusions 14a, 14b for fitting with the light guide diffuser 5, and a plurality of sheets located on the back side of the substrate 4 and arranged in the longitudinal direction of the tube The fin part 15 is provided as a main part.

  The heat sink 6 is made of a light material having high thermal conductivity such as aluminum, for example, and the grip portion 12, the recesses 13a and 13b, the protrusions 14a and 14b, and the fin portion 15 are integrally formed in a U-shape in a longitudinal section. Has been.

  Since the heat sink 6 is provided in close contact with the back surface of the substrate 4 and fitted to the light guide diffuser 5, the heat conducted from the contact surface between the substrate 4 and the light guide diffuser 5 is transferred to the fin portion 15. Can be released efficiently. The protrusions 14a and 14b may have a groove shape, and the groove portions 8a and 8b may have a protrusion shape.

  When the heat sink 6 is combined with the tubular body 2 by making the trajectory drawn by each tip of the fin portion 15 into a circular arc when viewed in cross section, the heat sink 6 has a shape similar to that of a general cylindrical fluorescent lamp as a whole. End caps for fluorescent lamps can be attached.

  Next, the operation of the LED fluorescent lighting device 1 will be described. First, when the user turns on the power, the power is supplied to the circuit of the substrate 4 and the LED light source unit 3 emits light. The angle of the light emitted from the LED light source unit 3 is 120 °, and the light receiving surface 9 of the light guide diffuser 5 provided so as to face the LED light source unit 3 emits the light emitted from the LED light source unit 3. Receives almost all light.

  The light received by the light receiving surface 9 of the light guide diffuser 5 is transmitted through the light guide diffuser 5, and the shape of the curved surface portion 11 and the surface of the light guide diffuser lens 5 are blasted. The light irregularly reflected by the curved surface portion 11 is diffusely reflected by the curved surface portion 11 through the light guide diffuser. Due to this chain of irregular reflections, light diffuses in the light guide diffuser 5 over a wide range.

  The light diffused in the light guide diffuser 5 over a wide range is irradiated from the curved surface portion 11 of the light guide diffuser 5 toward the tube 2, and the tube 2 is made of a translucent material. The light irradiated in this way passes through the tube 2 as it is, and is uniformly irradiated from the entire circumferential surface of the tube 2 to the external space.

  In the LED fluorescent lighting device 1, the tube body 2 holds the heat sink 6, and in use, the LED heat illuminating apparatus 1 is installed so that the heat sink 6 is positioned on the attachment device side. Since the heat sink 6 is downsized to approximately the same size as the light guide diffusion lens 5, the portion shielded by the heat sink 6 is reduced, so that the irradiation angle of light emitted from the tube body 2 is expanded to 340 °. Can do. Thereby, light reaches the fixture side (ceiling surface and wall surface), and the light spreads by the reflector of the lighting fixture. Therefore, the irradiation range can be practically expanded to 360 °, and the user does not feel uncomfortable. Moreover, the shape of the light guide diffuser 5 can be changed to a shape according to the purpose. For example, the light guide diffuser 5 can be changed to have an irradiation angle / direction desired by the user.

  Finally, the characteristics of the LED fluorescent lighting device 1 are shown. FIG. 9 is a graph showing an irradiation range based on actual measurement values of the LED fluorescent lighting device 1. As shown in FIG. 9, it can be seen that the light from the LED light source unit 3 is irradiated at an angle of approximately 340 °. As for the remaining angle of 20 ° that has not been irradiated, as described above, light is reflected by the reflection plate of the lighting fixture.

Table 1 is a table comparing the illuminance based on the actual measurement values of the LED fluorescent lighting device 1 with other companies.

  As shown in Table 1, it can be seen that the LED fluorescent lighting device 1 emits light that is close to natural light and has high color rendering properties while reducing power consumption. Thus, it was proved that the LED fluorescent lighting device 1 has excellent characteristics.

  As described above, according to the present invention, the light guide diffusing lens 5 is made of a light-transmitting material, subjected to uneven processing, and has an uneven surface. However, it penetrates the inside of the light guide diffuser 5 and is irregularly reflected by the unevenness of the surface. And since the light guide diffuser 5 is processed into a shape that further reflects the irregularly reflected light, the light reflection is chained and the light from the LED light source unit 3 can be diffused in multiple directions.

  Further, according to the present invention, by using organic electroluminescence (hereinafter referred to as “organic EL”) for the LED light source unit 3, the luminous efficiency is high, but there is little heat generation, and the voltage is increased because the organic EL itself emits light. Low power consumption can be reduced.

  Moreover, according to this invention, it is the fluorescent lamp-like tube body 2 with the shape of a cover long, the LED light source part 3, the board | substrate 4, and the heat sink 6 are also long, and the LED light source part 3 is on the board | substrate 4. Since they are arranged in a line in the longitudinal direction of the tubular body, a conventional fluorescent lamp can be used as an illumination device that exhibits the effect of claim 1 or claim 2.

  In addition, according to the present invention, the light receiving surface 9 of the light guide diffuser 5 is disposed so as to face the front surface of the LED light source unit 3, so that the straight light specific to the LED is efficiently received. can do. In addition, since the light guide diffuser 5 has a substantially crescent shape when viewed from the longitudinal section, light reflected irregularly in the light guide diffuser 5 can be received by a crescent-shaped curved surface, so that a more efficient reflection chain occurs. The light can be irradiated over a wide area from the entire surface of the crescent-shaped curved surface portion 11 of the light guide diffuser 5.

  Furthermore, according to the present invention, the grooves (or protrusions) 8a and 8b are provided on the inclined surfaces 7a and 7b of the light guide diffuser 5, and the protrusions (or grooves) 14a and 14b are provided on the heat sink 6. The inclined surfaces 7a and 7b of the light guide diffuser 5 and the heat sink 6 are fitted to prevent the light guide diffuser 5 from falling in the tube 2, and the heat of the light guide diffuser 5 is transferred to the LED light source unit 3 and The heat can be dissipated together with the heat of the substrate 4.

  It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 LED fluorescent lighting apparatus 2 Tube 3 LED light source part 4 Board | substrate 5 Light guide diffuser 6 Heat sink 7a, 7b Inclined surface 8a, 8b Groove part (or protrusion)
9 Light-receiving surface 10a, 10b Open end 11 Curved surface portion 12 Grip portion 13a, 13b Recess
14a, 14b Projection (also h groove)
15 Fin portions 16a, 16b End caps 17a, 17b Support terminal portions L1, L2, L3 Light S Socket 101 LED fluorescent lighting device 102 Light source substrate 201 LED fluorescent lighting device 202 Tube 203 Inner wall 204 Tube portion 205 Tube portion 206 Light emission Device 207 Phosphor 208 Power supply circuit 209 Light guide diffuser

The present invention has been made to solve the above problems, and the LED fluorescent lighting device according to claim 1 is a substrate having a heat sink that dissipates heat generated in the substrate, and a lighting circuit held by the heat sink. And an LED fluorescent lighting device comprising a flat LED light source unit provided on the front surface of the substrate, and a cover made of a light-transmitting material that houses the heat sink, the substrate, and the LED light source unit. A light guide diffuser made of a translucent material having an uneven surface processed on the surface, wherein the light guide diffuser has an uneven surface processed with light emitted from the LED light source irregularly reflected by unevenness of the surface formed by, are processed into a shape so that the light diffusely reflected is further reflected, wherein the cover is a fluorescent lamp shaped tube long, the heat sink and the group In addition, the LED light source unit is long, the LED light source units are arranged in a line in the longitudinal direction of the tube on the substrate, and the light guide diffuser is formed in a substantially crescent shape in a longitudinal sectional view. The concave portion of the light guide diffuser is provided so as to face the front surface of the LED light source unit, and a light receiving surface that receives light emitted from the LED light source unit, and It is provided so that it may become a character, and is comprised with a pair of inclined surface which hold | grips the said heat sink .

According to the LED fluorescent lighting device of claim 1, the cover is a long fluorescent lamp-like tube, the heat sink and the substrate, and the LED light source unit are also long, and the LED light source unit is a substrate. Since it is arranged in a row in the longitudinal direction of the tube body, it can be replaced with a conventional fluorescent lamp.

Furthermore, according to the LED fluorescent lighting device of claim 1, since the light receiving surface of the light guide diffuser is disposed so as to face the front surface of the LED light source unit, straight light unique to the LED is obtained. Can be received efficiently. In addition, the light guide diffuser has a substantially crescent shape when viewed in a longitudinal section, so that light that has been irregularly reflected in the light guide diffuser can be received by a crescent-shaped curved surface. It can irradiate a wide range from the entire surface of the crescent-shaped curved surface of the diffuser.

According to a second aspect of the present invention, in the LED fluorescent lighting device according to the first aspect, the light guide diffuser is provided with a protrusion (or a groove) extending in the longitudinal direction of the tubular body on each of the inclined surfaces. The heat sink is provided with a groove (or protrusion) extending in the longitudinal direction of the tubular body to be engaged with the protrusion, and the protrusion (or groove) of the light guide diffuser is the groove (or protrusion) of the heat sink. The light guide diffuser and the heat sink are fitted together by being inserted into and engaged with.

According to the LED fluorescent lighting device of claim 2, in addition to the effect of claim 1, the protrusion (or groove) is provided on the inclined surface of the light guide diffuser, and the groove (or protrusion) is provided on the heat sink. As a result, the inclined surface of the light guide diffuser and the heat sink are fitted to prevent the light guide diffuser from falling in the tube, and the heat of the light guide diffuser is dissipated together with the heat of the substrate and the LED light source unit. be able to.

According to a third aspect of the present invention, there is provided the LED fluorescent lighting device according to the first or second aspect, wherein organic electroluminescence is used for the LED of the LED light source unit.

According to the LED fluorescent lighting device of claim 3, in addition to the effect of claim 1 or claim 2, by using organic electroluminescence (hereinafter referred to as organic EL) for the LED light source part, the luminous efficiency is Although it is high, it generates little heat, and the organic EL itself emits light, so that the voltage can be kept low and power consumption can be reduced.

Claims (5)

A heat sink that dissipates heat generated by the substrate, a substrate having a lighting circuit held by the heat sink, a flat LED light source portion provided on the front surface of the substrate, the heat sink, the substrate, and the substrate In an LED fluorescent lighting device comprising a cover made of a translucent material that houses an LED light source unit,
Provided with a light guide diffuser made of a translucent material whose surface has been subjected to uneven processing,
The light guide diffuser is shaped so that the light emitted from the LED light source is irregularly reflected by the irregularities on the surface formed by the irregularity processing inside the light guide diffuser, and the irregularly reflected light is further reflected. An LED fluorescent lighting device that is processed.   2. The LED fluorescent lighting device according to claim 1, wherein organic electroluminescence is used as the LED of the LED light source unit. The cover is a long fluorescent lamp-like tube,
The heat sink, the substrate, and the LED light source unit are long,
3. The LED fluorescent lighting device according to claim 1, wherein the LED light source units are arranged in a line in a longitudinal direction of a tube on the substrate. The light guide diffuser is formed in a substantially crescent shape when viewed in a longitudinal section,
The concave portion of the light guide diffuser is provided so as to face the front surface of the LED light source unit, and a light receiving surface that receives light emitted from the LED light source unit, The LED fluorescent lighting device according to claim 3, wherein the LED fluorescent lighting device is configured to include a pair of inclined surfaces that hold the heat sink. The light guide diffuser is provided with protrusions (or grooves) extending in the longitudinal direction of the tube on each of the inclined surfaces,
The heat sink is provided with a groove (or protrusion) extending in the longitudinal direction of the tubular body to be engaged with the protrusion.
The light guide diffuser and the heat sink are fitted together by inserting and engaging the protrusion (or groove) of the light guide diffuser into the groove (or protrusion) of the heat sink. The LED fluorescent lighting device according to claim 4.