JP2011076919A - Led array lighting unit, and planar indirect lighting fixture using this unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-handle LED array lighting unit with LEDs and circuit components for lighting the LEDs arranged and connected to each other on a tape-like substrate, and to provide an inexpensive LED planar indirect lighting fixture using the above unit. <P>SOLUTION: The LED planar indirect lighting fixture is structured of an LED-array lighting unit with a plurality of LEDs and circuit components for lighting the plurality of LEDs arranged and connected to each other on a tape-like substrate with flexibility, and equipped with alternating-current power source connecting terminals on either end of the tape-like substrate, a lighting fixture body with an inner side face made of a reflecting face for irregular reflection of light flux from the LEDs with a cross-section ship-bottom shape, and a semi-transparent cover mounted so as to cover the one or the plurality of LED-array lighting units arranged along an inside edge end of an opening of the fixture body and the opening of the fixture body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a planar indirect lighting apparatus using a plurality of LEDs as light sources, in particular, an LED array lighting unit in which the plurality of LEDs and parts of a lighting device that lights the LEDs are arranged and connected on a tape-shaped substrate, and The present invention relates to a planar indirect lighting device using the same unit.

LEDs are increasingly used as illumination light sources due to improved luminous efficiency, and lighting fixtures such as bulb-type lamps and LED straight tube fluorescent lamps have been commercialized as alternatives to conventional incandescent lamps and fluorescent lamps. Yes. Several inventions related to surface illumination using LEDs as backlight light sources for liquid crystal display devices and photographic display panels have also been disclosed.
Japanese Patent Application Laid-Open No. 2008-300203 discloses an invention related to a ceiling light using a semiconductor light emitting element such as a semiconductor light emitting diode (LED) as a light source.

JP 2008-300203 A

  The lighting fixture disclosed in Patent Document 1 includes: “the fixture main body 10; the semiconductor light emitting element 21 disposed on the outer edges 14 and 15 of the fixture main body; A lens body 30 that mainly controls the light in the parallel direction; a reflector 40 that is opposed to the semiconductor light emitting element and is inclined toward a substantially central portion of the instrument body; According to the description of the “Best Mode for Carrying Out the Invention” in the specification, a plurality of LEDs are provided. Are arranged on a light emitting element substrate of a predetermined length to constitute a linear light emitting module, and a necessary number of the light emitting modules are selected to form one long light source body. , Opposite sides of the instrument body Attached to and supported by a support plate formed integrally with the chassis on the outer edge, and further supporting the lens body composed of a long convex lens on the support plate so as to cover the long light source body, or lighting each LED There is a problem in that it takes time to manufacture the lighting fixtures, such as wiring with the device using a cord.

  The present invention provides an LED array lighting unit that is easy to handle by arranging and integrating an LED and a lighting device on a tape-like substrate, and is easy to manufacture and using an LED surface shape that is easy to manufacture using the LED array lighting unit. It is an object to provide a lighting fixture.

The present inventors have solved the above problems by the following means.
(1) An LED array lighting unit comprising a plurality of LEDs and components constituting a lighting device for lighting the plurality of LEDs arranged and connected on a flexible tape-like substrate. .
(2) The LED array lighting unit as described in (1) above, wherein the tape-like substrate is flexible.
(3) A plurality of LEDs are arranged on a tape-like substrate at regular intervals, and circuit components for lighting the LEDs are distributed between the LEDs arranged at regular intervals. The LED array lighting unit according to (1) or (2).

(4) The previous item (1), wherein the plurality of LEDs are connected to the circuit components for lighting the plurality of LEDs by soldering to a copper foil forming a circuit pattern on the upper surface of the tape-like substrate. The LED array lighting unit according to any one of (1) to (3).
(5) The LED array lighting unit according to any one of (1) to (4) above, wherein AC power supply connection terminals are provided at both ends of the tape-like substrate.

  (6) The copper foil LED forming the circuit pattern formed on the upper surface of the tape-like substrate is arranged, the vicinity of the connecting portion is formed wide, and the LED is applied to the substrate of the portion where the wide copper foil is adhered. A plurality of through holes for transmitting the heat generated in the substrate to the back surface of the substrate, and a copper foil for heat dissipation, a heat conductive double-sided adhesive sheet, and an aluminum heat sink are laminated on the back surface of the substrate, (1) to (1) above characterized in that the wide copper foil is transmitted to the aluminum heat sink through the through hole, the heat radiating copper foil on the back surface, and the heat conductive double-sided adhesive tape, and can be radiated from the aluminum heat sink. The LED array lighting unit according to any one of 3).

(7) A planar luminaire using the LED array lighting unit described in (1) to (6) above, wherein the inner surface is a reflecting surface that diffusely reflects the light flux from the LED, and the cross-section of the luminaire A main body, one or a plurality of the LED array lighting units disposed along the inner edge of the opening of the fixture body, and a translucent cover attached to cover the opening of the lighting fixture body. The luminous flux of each LED irradiated toward the reflecting surface is diffusely reflected by the reflecting surface, and is emitted to the outside as scattered light through a translucent cover attached to the opening of the lighting fixture body. An LED planar indirect lighting device, characterized in that it is configured.
(8) The opening of the luminaire main body has a rectangular shape, and one LED array lighting unit is arranged and connected to each of the inner edges of the four sides thereof. LED planar indirect lighting fixture.
(9) The opening of the luminaire main body is circular, and one or more LED array lighting units are arranged and connected to the inner edge of the luminaire as described in (7) above. LED planar indirect lighting fixture.

  (10) When the LED planar indirect illuminator described in (7) to (9) above includes a storage battery, and the power supply from the AC power supply is cut off, a DC voltage is supplied from the storage battery to the LED array lighting unit. An LED planar indirect lighting device characterized by being configured to function as an emergency light by supplying and lighting an LED disposed.

The following effects are exhibited by the LED array lighting unit of the present invention.
<1> The LED array lighting unit arranges a plurality of LEDs on the tape-like substrate 5 at equal intervals, and disperses the parts 3 of the lighting device that lights the LEDs among the LEDs arranged at equal intervals. Since the LED and the LED lighting device are integrally formed, the planar lighting device using the LED can be easily and easily manufactured, and the cost can be reduced by mass production.
<2> Since the tape-like substrate is flexible, the opening can be mounted on a lighting fixture having an opening of an arbitrary shape such as a square or circular lighting fixture.
<3> Since the connection between the plurality of LEDs and the components constituting the lighting device for lighting the plurality of LEDs is made by soldering to the copper foil forming the circuit pattern on the upper surface of the tape-like substrate, Mass production is possible and the cost can be reduced.
<4> Since the AC power supply connection terminals are provided at both ends of the LED array lighting unit, the LED array lighting units can be used by being connected in the required number according to the conditions such as the size of the lighting fixture and the required illuminance. The connection to the commercial AC power supply can be realized with a single plug as in the conventional lighting device, and the handling at the place of use is simple and easy.
<5> The copper foil that forms the circuit pattern of the portion where the LEDs are arranged and connected is formed wide, a plurality of through holes are formed in the substrate below the wide copper foil, and the back surface of the substrate is formed. Since heat dissipation copper foil, heat conductive double-sided adhesive sheet, and aluminum heat sink are laminated, the heat generated from the LED is transferred from the wide copper foil to the through hole, the copper foil on the back, and the heat conductive double-sided adhesive tape. To the aluminum heat sink, heat is radiated from the aluminum heat sink, and the LED can be stably operated.

Moreover, the following effect is exhibited by the lighting fixture using the LED array lighting unit of the present invention.
<6> The planar indirect lighting fixture of the present invention has a cross-sectional ship bottom shape, and its inner side surface is configured as a reflecting surface that irregularly reflects the luminous flux of the LED, along the inner edge of the opening of the lighting fixture main body. Since it is composed of one or a plurality of arranged LED array lighting units and a translucent cover mounted so as to cover the opening of the luminaire main body, it is irradiated toward the reflecting surface. The luminous flux of the LED is irregularly reflected by the reflecting surface and emitted as soft indirect illumination scattered light through a semi-transparent cover, so that a preferable illumination environment can be configured.
<7> An LED array lighting unit disposed along an opening of a lighting fixture is formed by distributing a plurality of LEDs and circuit components for lighting these LEDs on a flexible tape-like substrate. Therefore, it is possible to form a lighting fixture having an opening of an arbitrary shape including a square or circular lighting fixture.
<8> The lighting fixture body has a square opening, and each of the LED array lighting units is arranged and connected to the inner edge of each of the four sides, or the lighting fixture has a circular shape. In a lighting fixture in which a plurality of LED array lighting units are arranged in a circle at the inner edge, each LED array lighting unit includes a circuit component for lighting the LED, so one lighting device (power supply) is provided. Even if a failure occurs, the other LED array lighting units are lit, and unlike conventional lighting fixtures in which all LEDs are lit with a single lighting device, darkness can be avoided. In addition, since the heat generated by the power source can be dispersed by dispersing the power source, the life of the lighting circuit can be extended.
<9> Since the LED planar indirect lighting device of the present invention includes a storage battery, when the power supply from the AC power supply is cut off, a DC voltage is supplied from the storage battery to the LEDs arranged in the LED array lighting unit. It can be turned on and function as an emergency light, which eliminates the anxiety of darkness and helps save lives.

Configuration diagram of LED array lighting unit of the present invention Enlarged sectional view of the LED connection part of the LED array lighting unit Structure explanatory drawing of the lighting fixture using the LED array lighting unit of this invention The circuit diagram explaining the effect | action of the LED array lighting unit of this invention, and the lighting fixture using the unit

DESCRIPTION OF EMBODIMENTS Embodiments of an LED array lighting unit of the present invention and a lighting fixture using the unit will be described with reference to FIGS. FIG. 1 is a configuration diagram of an LED array lighting unit according to the present invention, FIG. 2 is an enlarged cross-sectional view of an LED connection portion of the LED array lighting unit, FIG. 3 is a circuit configuration diagram of the LED array lighting unit, and FIG. FIG. 4 is a structural explanatory diagram of a lighting fixture using the LED array lighting unit of the present invention.
In the figure, 1 is an LED array lighting unit, 2 is an LED, 3 is a circuit component for lighting the LED, 4 is an AC power connection terminal, 5 is a tape-like substrate, 5a is a through-hole, 6 is a copper foil forming a circuit pattern, 7 is a heat-dissipating copper foil, 8 is a heat conductive double-sided adhesive sheet, 9 is an aluminum heat sink, 10 is a lighting fixture body, 11 is a reflective surface, 12 is a cover, 13 is a cord, 20 is an LED array, 21 is a rectifier, and 22 is A lighting device 23 is a storage battery.

As shown in FIG. 1, the LED array lighting unit 1 of the present invention has a plurality of LEDs 2 arranged on a flexible tape-like substrate 5 at regular intervals, and a lighting device for lighting the LEDs 2. The circuit components 3 such as IC chips, coils, capacitors, resistors, etc. constituting the LED 22 are distributed among the plurality of LEDs 2 arranged at the predetermined intervals, thereby the LED 2 and the lighting device 22 for lighting the LED 2; Are formed in an integral structure, and AC power supply connection terminals 5 are provided at both ends thereof.
The LED 2 and the circuit component 3 constituting the lighting device 22 are connected by soldering to a copper foil 6 forming a circuit pattern formed on the upper surface of the tape-like substrate 5 except for a part of wiring. ing.
Then, the LED 2 of the copper foil 6 forming the circuit pattern formed on the upper surface of the tape-like substrate 5 is disposed and the vicinity of the connected portion is formed wide, and the substrate of the portion to which the wide copper foil 6 is attached 5 is provided with a plurality of through holes 5a for transmitting heat generated by the LED 2 to the back surface of the substrate 5, and a copper foil for heat dissipation 7, a heat conductive double-sided adhesive sheet 8, and an aluminum heat sink 9 are laminated on the back surface of the substrate 5. The heat generated from the LED 2 is transmitted from the wide copper foil 6 to the aluminum heat sink 9 through the through-hole 5a, the heat radiating copper foil 7 and the heat conductive double-sided adhesive tape 8, and radiated from the aluminum heat sink 9. It has a structure.

The LED array lighting unit 1 of the present invention obtains electric power necessary for lighting the LED 2 by connecting the AC power connection terminal 4 to a commercial power source.
As shown in FIG. 3, the AC power input from the AC power connection terminal 4 is converted from AC to DC by a full-wave rectifier 21 and supplied to a plurality of LED arrays 20 connected in series.
Note that the AC power supply connection terminals 4 and 4 at both ends of the LED array lighting unit 1 are connected by through lines. In an illumination device that uses a plurality of LED lighting units 1, a plurality of LED lighting units 1 are connected in cascade. The connection to the power supply is made possible by a single plug as in the conventional lighting fixture.

The planar lighting fixture using the LED array lighting unit 1 of the present invention includes a lighting fixture main body 10 having a cross section composed of a reflecting surface 11 whose inner side is irregularly reflected for incident light as shown in FIG. It is composed of one or a plurality of the LED array lighting units 1 arranged along the inner edge of the opening of the main body 10 and a translucent cover 12 mounted so as to cover the opening of the apparatus main body. The light flux of each LED 2 irradiated toward 11 is diffusely reflected by the reflecting surface 11 and is emitted to the outside as scattered light through the translucent cover 12 attached to the opening of the instrument body 10. .
FIG. 1 shows an embodiment in which the opening of the luminaire main body 10 is square, and one LED array lighting unit 1 is disposed on each of the inner edges of the four sides. Can be arranged in the shape of one or more circles at the inner edge of the circular lighting fixture body 10, and further, an opening such as a polygon or an ellipse can be provided. It can also be applied to planar indirect lighting fixtures.
In a planar indirect lighting fixture using a plurality of LED array lighting units 1, as shown in FIG. 3, the AC power supply connection terminals 4 and 4 at both ends of the LED array lighting unit 1 are connected through lines. The adjacent AC power connection terminals 4 of the LED lighting units 1 arranged adjacent to each other in the lighting fixture are connected to each other by a cord 13 to supply AC power to each lighting device, and to commercial AC power This connection is possible with a single plug as in the conventional lighting fixture.
Moreover, since each LED array lighting unit 1 is provided with the lighting device 22, respectively, unlike the lighting fixture comprised so that all LEDs may be lighted by one lighting device, all the LEDs 2 will not light up all at once. The occurrence of a defect is not due to a power failure, but also has the advantage of a long LED life and low power consumption.

  In addition, the LED planar indirect lighting apparatus is provided with a storage battery 23, and when the power supply from the AC power supply is cut off, a DC voltage is supplied from the storage battery 23 to the LED arranged in the LED array lighting unit 1 to be lit. It is also preferable to function as an emergency light. In addition, in the lighting fixture using the some LED array lighting unit 1, it is preferable to be able to supply the DC voltage from the said storage battery 23 to any one or several units.

1: LED array lighting unit 2: LED
3: Components constituting the lighting device 4: AC power supply connection terminal 5: Tape-like substrate 5a: Through hole 6: Copper foil for forming a circuit pattern 7: Copper foil for heat dissipation 8: Thermal conductive double-sided adhesive sheet 9: Aluminum heat sink 10 : Lighting fixture body 11: Reflecting surface 12: Cover 20: LED array 21: Rectifier 22: Lighting device 23: Storage battery

Claims (10)

  A plurality of LEDs (2) and a component (3) constituting a lighting device for lighting the plurality of LEDs (2) are arranged and connected on a tape-like substrate (5). LED array lighting unit.   2. The LED array lighting unit according to claim 1, wherein the tape-like substrate (5) is flexible.   A plurality of LEDs (2) are arranged on the tape-like substrate (5) at regular intervals, and circuit components (3) for lighting the LEDs (2) are arranged between the LEDs (2) arranged at the regular intervals. The LED array lighting unit according to claim 1, wherein the LED array lighting unit is dispersedly arranged.   The connection between the plurality of LEDs (2) and the circuit component (3) for lighting the plurality of LEDs (2) is formed on the copper foil (6) forming the circuit pattern formed on the upper surface of the tape-like substrate (5). The LED array lighting unit according to any one of claims 1 to 3, wherein the LED array lighting unit is formed by soldering.   The LED array lighting unit according to any one of claims 1 to 4, wherein an alternating current power connection terminal (4) is provided at both ends of the tape-like substrate (5).   The LED (2) of the copper foil (6) forming the circuit pattern formed on the upper surface of the tape-like substrate (5) is arranged and the vicinity of the connecting portion is formed wide, and the wide copper foil (6) is formed. A plurality of through holes (5a) for transmitting the heat generated by the LEDs to the back surface of the substrate are formed in the pasted portion of the substrate (5), and a heat radiating copper foil (7) is formed on the back surface of the substrate (5). The heat conductive double-sided adhesive sheet (8) and the aluminum heat sink (9) are laminated, and the heat generated by the LED (2) is radiated from the wide copper foil (6) to the through hole (5a) and the back surface. The copper foil (7) and the heat conductive double-sided adhesive tape (8) are transmitted to the aluminum heat sink (9) so that heat can be radiated from the aluminum heat sink (9). The LED array lighting unit according to any one of the preceding claims.   7. A planar luminaire using the LED array lighting unit (1) according to claim 1, wherein the inner surface is a reflecting surface (11) for diffusing and reflecting the light beam from the LED (2), and the cross section is a ship bottom type. Luminaire main body (10), one or a plurality of LED array lighting units (1) disposed along the inner edge of the opening of the luminaire main body (10), and the opening of the luminaire main body (10) A light-transmitting cover (12) mounted so as to cover the light flux of each LED (2) irradiated toward the reflecting surface (11) is diffusely reflected by the reflecting surface (11), The LED planar indirect lighting device is configured to be emitted to the outside as scattered light through a translucent cover (12) attached to the opening of the lighting device body (10).   The opening part of a lighting fixture main body (10) comprises a square, The said LED array lighting unit (1) is each arrange | positioned and connected to the inner edge of four sides, The connection of Claim 5 characterized by the above-mentioned. The LED planar indirect lighting fixture described.   The opening part of a lighting fixture main body (10) comprises a circle, and the LED array lighting unit (1) is arrange | positioned and connected to the inner edge of one or more circle shape at the inner edge, The Claim 5 characterized by the above-mentioned. The LED planar indirect lighting fixture described. When the LED planar indirect lighting device according to claim 7 is provided with a storage battery, and the power supply from the AC power supply is cut off, a DC voltage from the storage battery is disposed in the LED array lighting unit (1). The LED planar indirect illuminator is configured to function as an emergency light by supplying the LED (2) to light.

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