WO2013021516A1 - 照明用光源 - Google Patents
照明用光源 Download PDFInfo
- Publication number
- WO2013021516A1 WO2013021516A1 PCT/JP2012/000527 JP2012000527W WO2013021516A1 WO 2013021516 A1 WO2013021516 A1 WO 2013021516A1 JP 2012000527 W JP2012000527 W JP 2012000527W WO 2013021516 A1 WO2013021516 A1 WO 2013021516A1
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- WIPO (PCT)
- Prior art keywords
- power supply
- supply unit
- light emitting
- housing
- light source
- Prior art date
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
- F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
- F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
Definitions
- the present invention relates to an illumination light source using an LED (light emitting diode) or the like, and more particularly to a technique for improving the performance against a dielectric strength test.
- Patent Document 1 a light bulb type lamp using an LED or the like has been proposed.
- FIG. 1 An example of this type of light bulb shaped lamp is shown in FIG.
- a lamp 100 shown in FIG. 10 includes a power supply unit (not shown) that outputs DC power, a module substrate 111 that is annular in plan view, and a plurality of LEDs (light emitting units) that are disposed along the periphery of the module substrate 111. ) 113, a base 120 formed in substantially the same shape as the light emitting module 110 in a plan view and attached to the upper surface side, and a substantially cylindrical shape made of metal.
- the lamp 100 also includes a bottomed cylindrical base 170 disposed on the lower side of the housing 160 and a globe 130 attached to the upper side of the housing 160 so as to cover the light emitting module 110.
- the light emitting module 110 is disposed so as to cover the upper side of the light emitting unit 113, and reflects the light emitted from the light emitting unit 13. And a second reflecting member 150 having a substantially bottomed cylindrical shape attached to the module substrate 111 so as to cover the opening.
- the light distribution characteristics of the lamp 100 can be improved by arranging the plurality of light emitting portions 113 along the peripheral portion of the module substrate 111.
- dielectric breakdown may occur between the housing 160 and the light emitting unit 113 disposed in the vicinity of the housing 160. Since the base 170 to the light emitting unit 113 are electrically connected by the power supply unit 80, the voltage applied by the withstand voltage test is concentrated between the light emitting unit 113 and the housing 160 that are electrically opened. When a voltage exceeding the dielectric breakdown distance is applied, dielectric breakdown or flashover occurs.
- the withstand voltage between the circuit including the light emitting module 110 and the casing 160 improves the withstand voltage between the circuit including the light emitting module 110 and the casing 160 (particularly, withstand voltage between the light emitting unit 113 and the casing 160), the performance is improved with respect to the withstand voltage test. It is possible to plan.
- the module substrate 111 is enlarged to increase the distance between the light emitting unit 113 and the housing 160, or the arrangement of the light emitting unit 113 is changed so as to be close to the center of the module substrate 111. It is conceivable to increase the distance between 113 and the housing 160.
- the casing 160 for housing the module substrate 111 must be enlarged, and the lamp 100 itself is increased in size.
- the arrangement of the light emitting unit 113 is changed so as to be close to the center of the module substrate 111, there is a possibility that desired light distribution characteristics cannot be obtained.
- the specifications are shared between the module substrate 111 mounted on the overseas lamp and the module substrate 111 mounted on the domestic lamp. Therefore, it is required to reduce the manufacturing cost of the lamp.
- the present invention has been made in view of the above-described problems, and provides an illumination light source capable of improving performance with respect to a withstand voltage test without changing the positional relationship between a light emitting unit and a housing. is there.
- an illumination light source includes a power supply unit that outputs electric power, a module board, and a light emitting unit mounted on the module board, and is connected to an output end of the power supply unit.
- a light emitting module that receives power from the power supply unit, a housing made of a conductive material that houses the power supply unit and is disposed adjacent to the light emitting module, and supplies power from the external power supply to the power supply unit And a voltage applied between the base and the housing during the dielectric strength test, with one end side being electrically connected to the output end of the power supply unit and the other end being electrically connected to the housing.
- a voltage dividing element for dividing pressure.
- the light emitting module and the voltage dividing element are commonly connected to the output end of the power supply unit, and further, the voltage dividing element is connected between the output end of the power supply unit and the housing.
- the voltage applied across the both ends of the voltage dividing element i.e., the dielectric strength test voltage applied between the base and the housing
- the divided voltage is applied, and the voltage applied between the light emitting module and the housing can be reduced. Accordingly, dielectric breakdown occurs between the light emitting unit and the housing without changing the positional relationship between the light emitting unit and the housing so as to increase the distance between the light emitting unit and the housing of the light emitting module. Therefore, it is possible to improve the performance with respect to the withstand voltage test while maintaining the light distribution characteristics.
- a device having a base for supplying power from an external power supply to the power supply unit has the same configuration as a domestic lamp having a rated voltage of 100 V to 120 V, but has a rated voltage of 220 V. Since it is possible to satisfy the performance required for the withstand voltage test for an overseas lamp of ⁇ 277V, that is, the current value when an AC voltage of 4 kV is applied between the base and the casing is 100 mA or less, Since parts specifications can be shared between domestic and overseas lamps, manufacturing costs can be reduced.
- the voltage dividing element may be a capacitor, a resistor, or a surge absorber.
- the illumination light source according to the present invention may include a connection means for electrically connecting the other end side of the voltage dividing element and the housing.
- the connecting means is formed in a plate shape with a conductive material, and is attached in a state in which a part of the opening on one side of the casing is closed and in contact with the casing.
- a base made of a conductive material and for fixing the light emitting module to the base, one end of which is electrically connected to the other end of the voltage dividing element, and the other end is a screw. It may be composed of a lead wire electrically connected to.
- the performance for the withstand voltage test can be improved by a simple method of connecting the lead wire to the screw, so that the assembly workability can be improved.
- connection means is disposed on the module substrate and electrically connected to the housing, and one end portion of the voltage dividing element.
- a lead wire electrically connected to the other end side and having the other end portion connected to a housing connection terminal via a lead wire may be used.
- the power supply unit may include a flyback converter in which an input end side and an output end side are electrically insulated by a transformer.
- the voltage can be dropped by the transformer during the withstand voltage test.
- the voltage applied between the body and the body can be greatly reduced.
- the circuit board has a thickness direction between a region where a circuit including the primary coil of the transformer is formed and a region where a circuit including the secondary coil of the transformer is formed.
- a slit may be formed so as to penetrate through.
- the rated voltage of the illumination light source according to the present invention may be 220V to 277V.
- ramp which concerns on embodiment Sectional drawing of the lamp
- the lamp 1 which is a lighting light source according to the present embodiment, is used at a rated voltage of 220V to 277V. Based on the industry standard with reference to EN 60968 Article 7, the cap 70 and the housing 60 are connected to each other. Performance against a dielectric strength test (see FIG. 10) in which an AC voltage of 4 kV is applied between them, that is, no dielectric breakdown or flashover occurs during the dielectric strength test.
- a dielectric strength test see FIG. 10 in which an AC voltage of 4 kV is applied between them, that is, no dielectric breakdown or flashover occurs during the dielectric strength test.
- FIG. 1 is a partially broken perspective view of the lamp 1.
- FIG. 2 is a cross-sectional view taken along line A-A ′ shown in FIG.
- FIG. 3 is a cross-sectional view of the main part along the line B-B ′ shown in FIG. 1.
- FIG. 4 is a plan view of the lamp 1 in a state where the globe 30 and the second reflecting member 50 are removed.
- the alternate long and short dash line drawn along the vertical direction of the paper indicates the lamp axis J of the lamp 1, and the upper side of the paper is the front of the lamp 1 and the lower side of the paper is the rear of the lamp 1. .
- the lamp 1 supplies power to the light emitting module 10, a base 20 to which the light emitting module 10 is attached, a globe 30 covering the light emitting module 10, and the light emitting module 10.
- the first reflecting member 40 for diffusing the emitted light
- the second reflecting member 50 for closing the opening inside the first reflecting member 40, the base 70 and the housing 60 during the dielectric strength test.
- a capacitor 80c for dividing a voltage applied therebetween.
- the light emitting module 10 includes a module substrate 11 and a plurality of (for example, 16) light emitting units 13 disposed on the module substrate 11.
- the light emitting unit 13 is formed by sealing a semiconductor light emitting element with a sealing body.
- the semiconductor light emitting element is an LED that emits blue light
- the sealing body is made of silicone resin mixed with phosphor particles that convert the wavelength of blue light into yellow light.
- part of the blue light emitted from the semiconductor light emitting element is wavelength-converted into yellow light by the sealing body, and white light generated by the color mixture of the unconverted blue light and the converted yellow light is emitted from the light emitting unit 13. It is emitted from.
- the light emission part 13 may use the EL element (electric luminescence element), for example.
- the module substrate 11 is formed in a substantially annular shape in plan view, and has a tongue piece portion 11a extending inward from one place on the inner peripheral edge.
- the tongue piece 11 a is provided with a power supply terminal 11 b for supplying power supplied from the power supply unit 80 to the light emitting unit 13.
- the base 20 is formed of a conductive material such as a metal mainly composed of Al, and has a substantially cylindrical shape having a through-hole 21 that is circular in plan view.
- the base 20 is arranged in a posture in which the tube axis coincides with the lamp axis J (see FIG. 2). Therefore, the front surface 22 and the rear surface orthogonal to the lamp axis J of the base 20 are both substantially circular in plan view.
- the power supply unit 80 is arranged in a state in which a part thereof protrudes from the through hole 21 into the globe 30.
- the semiconductor light emitting module 10 is attached to the front surface 22 side of the base 20. 2 and 3, the base 20 is formed with a screw hole 21 into which the screw 86 is screwed.
- the light emitting module 10 is fixed to the base 20 together with the first reflecting member 40 by using a screw 86 together.
- the screw 86 is made of a conductive material.
- Globe Globe 30 has a shape imitating a bulb of an A-type bulb that is a general bulb shape, and press-fits opening side end portion 31 of globe 30 into front side end portion 60a of housing 60.
- the light emitting module 10 and the first reflecting member 40 are fixed to the housing 60 in a state of covering the front.
- the shape of the globe 30 is not limited to the shape imitating a bulb of an A-type bulb, and may be any shape.
- the lamp 1 may be configured without a globe.
- the globe 30 may be fixed to the housing 60 with an adhesive or the like.
- the light incident on the inner surface 32 of the globe 30 is diffused by the peripheral wall of the globe 30, passes through the globe 30, and is taken out of the globe 30.
- the holder 62 has a substantially cylindrical shape that is open on both sides, and includes a large-diameter portion 63 and a small-diameter portion 64. Most of the power supply unit 80 is accommodated in the large-diameter portion 63 located on the front side. On the other hand, the rear-side opening 65 of the small-diameter portion 64 located on the rear side is closed by the fitting of the base 70.
- the holder 62 is made of an insulating material such as resin.
- the large diameter portion 63 of the holder 62 is disposed inside the through hole 21 of the base 20.
- the holder 62 is provided with a notch 66 at a position corresponding to the tongue piece 11 a of the light emitting module 10.
- the tip of the tongue piece 11 a is inserted into the holder 62 through the notch 66, and the power supply terminal 11 b disposed at the tip of the tongue piece 11 a is located in the holder 62.
- the housing 60 is made of a conductive material such as a metal whose main component is Al, and has a cylindrical shape that is open at both ends and reduced in diameter from the front to the rear. Further, the base 20 and the opening side end 31 of the globe 30 are accommodated in the front end 60 a of the housing 60, and the base 20 is partly in contact with the housing 60. It is fixed to the housing 60 in a state. Specifically, the outer peripheral edge of the rear side end of the base 20 has a tapered shape in accordance with the shape of the inner peripheral surface 60 b of the housing 60. The tapered surface 25 is in surface contact with the inner peripheral surface 60 b of the housing 60. Thereby, the base 20 and the housing
- the base 20 and the housing 60 are separate members here, they may be integrally formed by a manufacturing method such as die casting using a mold. Thereby, diffusion of heat generated from the light emitting module can be promoted.
- the base 70 is a member for receiving electric power from the socket of the lighting fixture when the lamp 1 is attached to the lighting fixture and turned on.
- the type of the base 70 is an E27 base that is an Edison type.
- the base 70 includes a shell portion 71 having a substantially cylindrical shape and an outer peripheral surface being a male screw, and an eyelet portion 73 attached to the shell portion 71 via an insulating portion 72.
- An insulating member 74 is interposed between the shell portion 71 and the housing 60.
- the first reflective member 40 is a cylindrical body having a substantially cylindrical shape with both sides opened, and a rear side of the body 41. And a substantially disc-shaped attachment portion 42 that closes the opening.
- the first reflecting member 40 is made of a resin such as polycarbonate.
- the first reflecting member 40 is provided with a hole 43, and the hole is mounted with the outer peripheral edge of the mounting part 42 placed on the inner peripheral edge of the module substrate 11 of the light emitting module 10.
- the first reflecting member 40 and the module substrate 11 are fastened together with the base 20 by screwing the screw 86 inserted into the portion 43 into the screw hole 26 of the base 20.
- the hole 43 is provided at three locations near the boundary between the main body 41 and the mounting portion 42.
- the main body 41 has a substantially cylindrical shape with a larger outer diameter on the front side than on the rear side, and the cylinder axis thereof coincides with the lamp axis J.
- the outer peripheral surface of the main body 41 has a substantially annular shape when viewed from the rear side along the lamp axis J and covers a plurality of light emitting units 13 arranged in an annular shape on the module substrate 11. .
- the first reflecting member 40 extends along the circumferential direction of the outer peripheral surface 45 of the main body 41 around the cylinder axis of the main body 41 across the main body 41 and the mounting portion 42.
- a plurality of openings 46 are provided at intervals. Specifically, equidistant intervals are provided along the circumferential direction of the outer peripheral surface 45 so that the 16 openings 46 as many as the number of the light emitting portions 13 of the light emitting module 10 face the light emitting portions 13 in a one-to-one relationship. It is provided in the main body 41 with a space.
- the opening 46 is substantially square in plan view, and a portion on the cylinder axis side that is about half of the light emitting unit 13 is located in the opening 46 in plan view, and is opposite to the cylinder axis that is the other half. Is covered with the main body 41. That is, about half of the light emitting unit 13 is exposed from the opening 46, and the remaining half is hidden behind the main body 41. As shown in FIG. 3, the upper surface (light emitting surface) of the light emitting unit 13 faces the outer peripheral surface 45 of the main body 41. A part of the light emitted from the light emitting unit 13 is reflected by the outer peripheral surface 45 of the main body 41.
- the second reflective member 50 includes a substantially cylindrical main body 50a and a bottomed cylindrical lid that closes the front side opening of the main body 50a. 50b.
- the main body 50a is formed with a flange 50c having a shape that gradually increases in diameter from the rear toward the front on the front side of the outer peripheral surface over the entire circumference. Thereby, the main body 50a exhibits a function of reflecting the light emitted from the light emitting unit 13 in a direction intersecting the lamp axis J on the outer peripheral surface.
- the power supply unit 80 is for lighting the light emitting unit 13, and, as shown in FIG. 2, a circuit board 80a and various electronic components mounted on the circuit board 80a ( Circuit element) 80b. In the drawings, only some circuit elements are denoted by reference numerals.
- the power supply unit 80 is accommodated in the holder 62 and is fixed to the holder 62 by screwing, bonding, engagement, or the like.
- the circuit board 80a is formed in a substantially rectangular plate shape, and its main surface is arranged in a posture parallel to the lamp axis J.
- One end portions of lead wires 88a and 88b are connected to the power supply terminals TP1 and TP2 of the power supply unit 80 provided in the circuit board 80a.
- the other end portion of the lead wire 88 a is connected to the eyelet portion 73 of the base 70 through the rear side opening 65 of the holder 62.
- the other end portion of the lead wire 88 b is connected to the shell portion 71 of the base 70 through the through hole 61 provided in the holder 62.
- one end of a twisted pair wiring 82 is connected to the output terminals TL1 and TL2 of the power supply unit 80 provided in the circuit board 80a.
- a power supply connector 82 a is attached to the other end of the twisted pair wiring 82.
- the power supply connector 82a is connected to a power supply terminal 11b provided in the light emitting module 10 (see FIG. 4).
- a lead wire 84 is connected to the terminal TE1 provided in the circuit board 80a, and a crimp terminal 84a is attached to the other end of the lead wire 84.
- the crimp terminal 84a is fixed to a screw 86 screwed into the screw hole 26 of the base 20 (see FIG. 4).
- the terminal TE1 is electrically connected to the housing 60 via the lead wire 84, the screw 86, and the base 20.
- the lead wire 84, the screw 86, and the base 20 constitute connection means for electrically connecting the capacitor 80c and the housing 60.
- Capacitor (Element for voltage division) As shown in FIGS. 1 and 2, the capacitor 80 c is attached on a circuit board 80 a constituting a part of the power supply unit 80. In the lamp 1 according to the present embodiment, a capacitor having a capacitance of 3300 pF is used as the capacitor 80a. The capacitor 80a is electrically connected to the terminal TE1 through a wiring pattern formed on the circuit board 80a.
- Circuit Configuration Here, the configuration of the circuit including the power supply unit 80 and the capacitor 80c will be described with reference to the circuit diagram of the power supply unit shown in FIG.
- the power supply unit 80 includes a rectifying / smoothing circuit 81a that rectifies and smoothes AC supplied from an AC power supply (not shown), and a flyback connected to the output terminal of the rectifying and smoothing circuit 81a. And a converter 81b.
- power supply terminals TP1 and TP2 for receiving power supply from an AC power supply during normal use and output terminals TL1 and TL2 for supplying power to the light emitting module 10 are provided.
- the rectifying / smoothing circuit 81a includes a diode bridge DB including four diodes D1, D2, D3, and D4, an electrolytic capacitor C1 connected between output terminals of the diode bridge DB, It is composed of resistors B1, F2, B2 connected between both ends of the capacitor C1, a series circuit composed of a coil NF and a capacitor C2, and outputs a voltage between both ends of the capacitor C2.
- a zener diode D5 is connected in parallel to the capacitor C2 in order to protect the flyback converter 81b.
- a surge absorber composed of a resistor F1 and a zinc oxide varistor ZNR is connected between the input terminals of the diode bridge DB in order to prevent a surge voltage from being applied to the rectifying and smoothing circuit 81a.
- the flyback converter 81b includes a control circuit IC1, a transformer T1, and a diode D1.
- the control circuit IC1 uses the SSL152x series manufactured by NXP Semiconductors.
- the control circuit IC1 has seven terminals, the first terminal being a power supply terminal, the second terminal being a grounding terminal, and the third terminal being a grounding terminal for an oscillator (not shown) in the control circuit IC1.
- the voltage supply terminal connected to the reference voltage source (not shown) in the control circuit IC1 is the number terminal, and the current detection terminal is connected to the current detection circuit (not shown) in the control circuit IC1.
- the sixth terminal is a terminal connected to the source of a switching element (not shown) made of an N-channel MOSFET in the control circuit IC1, and the eighth terminal is a terminal connected to the drain of the switching element.
- a capacitor C5 for smoothing a voltage applied to the first terminal and a capacitor C5 are connected in parallel between the first terminal and the output terminal on the low potential side of the rectifying and smoothing circuit 81a.
- a series circuit composed of two resistors R3 and R4 is interposed.
- the second terminal is connected to the output terminal on the low potential side of the rectifying and smoothing circuit 81a.
- the third terminal is connected to the output terminal on the low potential side of the rectifying / smoothing circuit 81a via a parallel circuit of a resistor R2 and a capacitor C4.
- the fourth terminal is connected to a connection point between the resistors R3 and R4, and a voltage generated at the connection point is input.
- the sixth terminal is connected to the output terminal on the low potential side of the rectifying and smoothing circuit 81a via resistors R6A and R6B connected in parallel to each other.
- the transformer T1 is induced when a current flows through the primary coil T11, a secondary coil T12 that supplies power induced to the light emitting module 10 when a current flows through the primary coil T11, and a primary coil T11. And a tertiary coil T13 for supplying the power to the power supply terminal of the control circuit IC1.
- the primary coil T11 has one end connected to the output terminal on the high potential side of the rectifying and smoothing circuit 12, and the other end connected to the eighth terminal of the control circuit IC1 via the resistor B3.
- the eighth terminal of the control circuit IC1 is connected to the drain of the switching element built in the control circuit IC1, the switching element is turned on and off to cause the primary coil T11 to operate. A pulsating current flows.
- the secondary coil T12 has one end connected to the output terminal TL1 on the high potential side via the diode D1.
- the tertiary coil T13 has one end connected to the first terminal of the control circuit IC1 via the diode D4 and the resistor R1, and the other end connected to the output terminal on the low potential side of the rectifying and smoothing circuit 81a.
- the diode D1 has an anode connected to the secondary coil and a cathode connected to the output terminal TL2 on the low potential side.
- Smoothing capacitors C3 and C7 and resistors R7A and R7B are connected in parallel between the cathode of the diode D1 and the other end of the secondary coil T12.
- the pulsating voltage generated between the cathode of the diode D1 and the other end of the secondary coil T12 is smoothed by the smoothing capacitors C3 and C7, so that a direct current is generated between the output terminals TL1 and TL2. Voltage is generated.
- a primary coil T11 is included between the other end of the secondary coil T12 opposite to the one connected to the anode of the diode D1 and the output terminal on the low potential side of the rectifying and smoothing circuit 81a.
- Capacitor for cutting off the circuit hereinafter referred to as “primary coil side circuit”) 81b1 and the circuit including the secondary coil T12 (hereinafter referred to as “secondary coil side circuit”) 81b2 in a DC manner.
- C6 is connected.
- a capacitor C8 is connected between the output terminal TL1 and the terminal TE1, and the terminal TE1 is electrically connected to the housing 60.
- the electronic component 80c shown in FIGS. 1 and 2 is the capacitor C8.
- the capacitor C8 does not conduct because a DC voltage is output from the output terminals TL1 and TL2 of the power supply unit 80 so that the output terminal TL1 has a higher potential than the output terminal TL2. Therefore, insulation is maintained between the output terminal TL1 and the housing 60.
- the capacitor C8 functions as a voltage dividing resistor.
- FIG. 7A shows an operation in a withstand voltage test of a lamp having the same configuration as the conventional one (hereinafter referred to as a lamp according to a comparative example) in which the output end of the power supply unit 80 and the housing 60 are insulated. It is explanatory drawing.
- the resistance between the light emitting module 10, in particular, the light emitting unit 13 and the housing 60 is extremely larger than the resistance inside the power supply unit 80 and the light emitting module 10. Therefore, when an AC voltage of 4 kV is applied between the base 70 and the housing 60 in the dielectric strength test, the voltage is concentrated between the light emitting module 10 and the housing 60, and the light emitting unit 13 and the housing 60 are Insulation breakdown occurs.
- FIG. 7B is an operation explanatory diagram in the dielectric strength test of the lamp 1 in which a 3300 pF capacitor C8 is connected between the output end of the power supply unit 80 and the housing 60.
- FIG. 7B is an operation explanatory diagram in the dielectric strength test of the lamp 1 in which a 3300 pF capacitor C8 is connected between the output end of the power supply unit 80 and the housing 60.
- the lamp 1 when an AC voltage of 4 kV was applied between the base 70 and the housing 60, a current of 1.5 mA flowed between the light emitting unit 13 and the housing 60.
- This current value is a current value that can be regarded as neither dielectric breakdown nor flashover, which is a measure for ensuring the safety of the lamp. That is, the lamp 1 according to the present embodiment has greatly improved performance with respect to the withstand voltage test as compared with the lamp according to the comparative example.
- the capacitor C8 is interposed between the output terminal TL1 of the power supply unit 80 and the housing 60, so that the light emitting unit 13 and the housing 60 are separated during the withstand voltage test.
- the voltage applied between the base 70 and the housing 60 is divided by the capacitor C8 so that the voltage is applied between the light emitting unit 13 and the housing 60.
- the voltage is reduced.
- the lamp provided with the base 70 for supplying power from the external power supply to the power supply unit 80 has the same configuration as the domestic lamp having the rated voltage of 100V to 120V, but the rated voltage Performance required in the dielectric strength test for overseas lamps of 220V to 277V, that is, neither dielectric breakdown nor flashover occurs when an AC voltage of 4 kV (eg, frequency 60 Hz) is applied between the base 70 and the housing 60
- 4 kV eg, frequency 60 Hz
- a voltage of about 1.2 kV is applied between both ends thereof.
- a voltage of about 2.8 kV is applied between the input terminals TP1, TP2 and the output terminals TL1, TL2 of the power supply unit 80. It will be.
- Most of the voltage of 2.8 kV applied between the input terminals TP1 and TP2 and the output terminals TL1 and TL2 of the power supply unit 80 is the primary coils T11 and 2 of the transformer T1 included in the flyback converter 81b.
- the power supply unit 80 includes the transformer T1
- a voltage drop occurs greatly at the transformer T1 during the withstand voltage test, so that the voltage applied between the light emitting unit 13 and the housing 60 is greatly reduced during the withstand voltage test. can do.
- the capacitance of the capacitor C8 is 3300 pF, but the capacitance can be appropriately set according to the balance with the impedance of the power supply unit during the dielectric strength test and the distance between the light emitting module and the housing.
- the capacitance of the capacitor C8 is 1000 pF, it fails the dielectric strength test, but if it is 2200 pF or more, it passes. That is, the withstand voltage improves as the capacitance increases, but since this is the direction in which the size of the capacitor increases, the upper limit of the capacitance is determined by the spatial arrangement, and in the present embodiment, it is up to 4700 pF. became.
- the capacitor C8 is installed on the circuit board 80a.
- the capacitor C8 also serves as a wiring connecting the output terminal TL1 and the housing 60. It can also be arranged as follows. In addition to reducing the number of components by installing the capacitor C8 on the circuit board 80a as in the present embodiment, there are advantages in that the arrangement and handling during manufacturing can be simplified.
- an elongated slit 80a1 extending in the longitudinal direction of the circuit board 80a is formed inside the circuit board 80a.
- the slit 80a1 is located on the circuit board 80a between a region where the primary coil side circuit 81b1 is formed and a region where the secondary coil side circuit 81b2 is formed. This prevents the occurrence of creeping discharge between the wiring pattern constituting a part of the primary coil side circuit and the wiring pattern constituting a part of the secondary coil side circuit in the circuit board 80a. . Thereby, the performance with respect to the dielectric strength test of the lamp 1 is further improved.
- FIG. 8A shows a plan view of the lamp 2 according to this modification in a state where the globe 30 and the second reflecting member 50 are removed, and FIG.
- the lead wire 84 connected to the terminal TE1 is connected to the power feeding connector 82a together with the twisted pair wiring 82.
- the power supply connector 82a includes three slots as shown in FIG. 8 (b).
- the power supply terminal 11 b two sockets corresponding to the twisted pair wiring 82 are connected to the light emitting unit 13 of the light emitting module 10, and a socket corresponding to the lead wire 84 is electrically connected to the housing 60.
- the socket corresponding to the lead wire 84 of the power supply terminal 11 b is connected to the other end portion of a housing connection lead wire (not shown) whose one end portion is soldered to the housing 60.
- the connecting means for electrically connecting the capacitor 80c to the housing 60 is constituted by the lead wire 84, the power feeding connector 82a, the power feeding terminal 11b, and the housing connecting lead wire.
- capacitor C8 is connected between the output terminal TL1 of the power supply unit 80 and the terminal TE1 electrically connected to the housing 60 .
- a resistor may be connected.
- a surge absorber such as a metal oxide varistor or a discharge gap may be connected.
- the example of the lamp 1 including the first reflecting member 40 and the second reflecting member 50 has been described.
- the embodiment is not limited thereto, and the first reflecting member 40 and the second reflecting member 40 are not limited thereto.
- the lamp which is not provided with the reflective member 50 may be used.
- the power supply unit 80 includes the flyback converter.
- the present invention is not limited to this.
- the power supply unit 80 may include a DC-DC converter other than a flyback converter such as a buck-boost converter.
- the present invention is not limited to this, and may have another light emitting element such as an EL element.
- the lamp of FIG. 9 is a lamp used as a thin downlight, and does not have a shell or an eyelet like the bulb-shaped base 70, but instead has power feeding portions 271 and 273 and a fixing portion 270. These power feeding portions 271 and 273 perform a function related to power feeding of the shell and the eyelet, and the function of fixing the lamp to the socket is performed by the fixing portion 270.
- the power feeding units 271 and 273 are connected to the power supply unit 280 by wiring, and the output from the power supply unit is supplied to the plate-shaped light emitting module 210.
- the light emitting module 210, the power supply unit 280, and the reflecting member 240 are housed in a casing 260 made of metal.
- a cover 230 made of a translucent resin or the like is attached in front of the housing 260. And the light radiate
- the casing 260 is an insulating material, it is possible to easily ensure a dielectric strength voltage.
- the output from the power supply unit and the metal casing are the same as in the embodiment. An insulation voltage can be ensured by installing a voltage dividing element between them.
- the lamp according to the present invention can be widely used in general lighting applications.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
本実施の形態に係る照明用光源であるランプ1は、定格電圧220V乃至277Vで使用するものであり、EN60968 7条の規格を参考にした業界基準に基づいて、口金70と筐体60との間に4kVの交流電圧を印加する絶縁耐圧試験(図10参照)に対する性能、つまり、絶縁耐圧試験時において、絶縁破壊もフラッシュオーバーもしないこととなっている。
<1>構造
以下、本実施の形態に係るランプ1の構造について説明する。
発光モジュール10は、モジュール基板11と、モジュール基板11に配設された複数(例えば、16個)の発光部13とを備える。発光部13は、半導体発光素子を封止体で封止してなるものである。ここで、半導体発光素子は、青色光を出射するLEDであり、封止体は、青色光を黄色光に波長変換する蛍光体粒子が混入されたシリコーン樹脂からなる。そして、半導体発光素子から出射された青色光の一部が封止体によって黄色光に波長変換され、未変換の青色光と変換後の黄色光との混色により生成される白色光が発光部13から出射される。なお、発光部13は、例えば、EL素子(エレクトリックルミネッセンス素子)を用いたものであってもよい。
基台20は、Alを主成分とする金属等の導電性材料により形成され、平面視円形の貫通孔21を有する略円筒形状を有する。この基台20は、筒軸がランプ軸J(図2参照)と一致する姿勢で配置されている。したがって、基台20におけるランプ軸Jに直交する前面22および後面はいずれも平面視略円環形状である。ここで、電源ユニット80が、貫通孔21からグローブ30内にその一部が突出した状態で配置される。また、基台20の前面22側に半導体発光モジュール10が取着されている。また、図2および図3に示すように、基台20には、螺子86が螺合する螺子孔21が形成されている。そして、発光モジュール10は、螺子86を用いて第1の反射部材40と共に基台20に共締めで固定されている。この螺子86は、導電性材料により形成されている。
グローブ30は、一般電球形状であるA型の電球のバルブを模した形状であり、グローブ30の開口側端部31を筐体60の前方側端部60a内に圧入することにより、発光モジュール10および第1の反射部材40の前方を覆った状態で、筐体60に固定されている。なお、グローブ30の形状は、A型の電球のバルブを模した形状に限定されず、どのような形状であっても良い。さらには、ランプ1は、グローブを備えない構成でも良い。また、グローブ30は接着剤などにより筐体60に固定されていても良い。
ホルダ62は、両側が開口した略円筒形状であって、大径部63と小径部64とで構成される。前方側に位置する大径部63には電源ユニット80の大半が収容されている。一方、後方側に位置する小径部64は、口金70が外嵌されることで、後方側開口65が塞がれている。ホルダ62は、樹脂などの絶縁性材料で形成されている。
筐体60は、Alを主成分とする金属等の導電性材料により形成されており、両端が開口し前方から後方へ向けて縮径した円筒形状を有する。また、筐体60の前方側端部60a内には基台20とグローブ30の開口側端部31とが収容されており、基台20が、周面の一部が筐体60に接触した状態で筐体60に固定されている。具体的には、基台20の後方側端部の外周縁は、筐体60の内周面60bの形状にあわせてテーパ形状となっている。そのテーパ面25が筐体60の内周面60bと面接触している。これにより、基台20と筐体60とは、電気的に接続されていることになる。
口金70は、ランプ1が照明器具に取り付けられ点灯された際に、照明器具のソケットから電力を受けるための部材である。口金70の種類は、エジソンタイプであるE27口金である。口金70は、略円筒形状であって外周面が雄ねじとなっているシェル部71と、シェル部71に絶縁部72を介して装着されたアイレット部73とを備える。シェル部71と筐体60との間には絶縁部材74が介在している。
第1の反射部材40は、図3に示すように、筒状であって、両側が開口した略円筒形状の本体部41と、本体部41の後方側開口を塞ぐ略円板形状の取付部42とを備える。第1の反射部材40は、ポリカーボネート等の樹脂により形成されている。
第2の反射部材50は、図2に示すように、略円筒状の本体部50aと、本体部50aの前方側開口を塞ぐ有底円筒状の蓋部50bとから構成される。本体部50aは、外周面における前方側に、後方から前方へ向け漸次拡径する形状を有する鍔部50cが全周に亘って形成されている。これにより、本体部50aは、発光部13から出射された光を外周面においてランプ軸Jと交差する方向へ反射させる機能を発揮する。
電源ユニット80は、発光部13を点灯させるためのものであって、図2に示すように、回路基板80aと、当該回路基板80aに実装された各種の電子部品(回路素子)80bとを有している。なお、図面では一部の回路素子にのみ符号を付している。この電源ユニット80は、ホルダ62内に収容されており、ねじ止め、接着、係合等によりホルダ62に固定されている。
コンデンサ80cは、図1および図2に示すように、電源ユニット80の一部を構成する回路基板80a上に取着されている。また、本実施の形態に係るランプ1では、このコンデンサ80aとして静電容量が3300pFのコンデンサを用いている。このコンデンサ80aは、回路基板80a上に形成された配線パターンを介して端子TE1に電気的に接続されている。
<2>回路構成
ここで、電源ユニット80およびコンデンサ80cからなる回路の構成について、図6に示す電源ユニットの回路図を用いて説明する。
<2-1>整流平滑回路
整流平滑回路81aは、4つのダイオードD1,D2,D3,D4から構成されるダイオードブリッジDBと、ダイオードブリッジDBの出力端間に接続された電解コンデンサC1と、電解コンデンサC1の両端間に接続された抵抗B1,F2,B2、コイルNFおよびコンデンサC2から構成される直列回路とから構成されており、コンデンサC2の両端間の電圧を出力する。ここで、コンデンサC2には、フライバックコンバータ81bを保護するために、ツェナーダイオードD5が並列に接続されている。また、ダイオードブリッジDBの入力端間には、整流平滑回路81aにサージ電圧が印加されるのを防止するために、抵抗F1と酸化亜鉛バリスタZNRとから構成されるサージアブソーバが接続されている。
<2-2>フライバックコンバータ
フライバックコンバータ81bは、制御回路IC1と、トランスT1と、ダイオードD1とを含んで構成されている。
<3>絶縁耐圧試験における動作説明
EN60968 7条の規格を参考にした業界基準によれば、絶縁耐圧試験(口金70のシェル71とアイレット72とを短絡した状態で、口金70と筐体60との間に、4kVの交流電圧(周波数:60Hz)を印加したときに流れる電流値を測定する試験、図10参照)において、絶縁破壊もフラッシュオーバーもしければ、ランプとしての安全性が確保されているものとみなすことができる。
また、本実施の形態ではコンデンサC8は回路基板80a上に設置したが、ランプの構成上可能であれば必ずしも回路基板上に設置する必要はなく、例えば出力端子TL1と筐体60を接続する配線を兼ねるように配置することも出来る。本実施の形態のようにコンデンサC8を回路基板80a上に設置することで部品点数を低減できるほか、製造時の配置・取り回しを簡易に出来るという利点がある。
(1)実施の形態では、コンデンサ80cが螺子86を介して筐体60と電気的に接続されてなるランプ1の例について説明したが、これに限定されるものではない。例えば、図8に示すように、給電コネクタ82aを介して筐体60と電気的に接続されてなるランプ2であってもよい。
10 発光モジュール
11 モジュール基板
13 発光部
20 基台
26 螺子孔
30 グローブ
40 第1の反射部材
50 第2の反射部材
60 筐体
70 口金
71 シェル
72 絶縁部
73 アイレット
80 電源ユニット
81a 整流平滑回路
81b フライバックコンバータ
81b1 1次コイル側回路
81b2 2次コイル側回路
82 ツイストペア配線
84,88a,88b リード線
86 螺子
Claims (8)
- 電力を出力する電源ユニットと、
モジュール基板と当該モジュール基板に実装された発光部とを有し且つ前記電源ユニットの出力端に接続されて前記電源ユニットからの電力供給を受ける発光モジュールと、
導電性材料により形成され、内部に前記電源ユニットを収納するとともに前記発光モジュールに隣接して配置される筐体と、
外部電源から前記電源ユニットへ電力を供給するための口金と、
一端側が前記電源ユニットの出力端に電気的に接続され且つ他端側が前記筐体に電気的に接続され、絶縁耐圧試験時において前記口金と前記筐体との間に印加される電圧を分圧する分圧用素子とを備える
ことを特徴とする照明用光源。 - 前記分圧用素子は、コンデンサ、抵抗またはサージアブソーバである
ことを特徴とする請求項1記載の照明用光源。 - 前記分圧用素子の前記他端側と前記筐体とを電気的に接続するための接続手段を備える
ことを特徴とする請求項1または請求項2に記載の照明用光源。 - 前記接続手段は、
導電性材料により板状に形成され、前記筐体の片側開口部の一部を塞ぎ且つ前記筐体に接触した状態で取着される基台と、
導電性材料により形成され且つ前記基台に前記発光モジュールを固定するための螺子と、
一端部が前記分圧用素子の前記他端側に電気的に接続され且つ他端部が前記螺子に電気的に接続されてなるリード線とから構成される
ことを特徴とする請求項3記載の照明用光源。 - 前記接続手段は、
前記モジュール基板上に配設され且つ前記筐体に電気的に接続された端子と、
一端部が前記分圧用素子の前記他端側に電気的に接続され且つ他端部がリード線を介して前記端子に接続されてなるリード線とから構成される
ことを特徴とする請求項3記載の照明用光源。 - 前記電源ユニットは、入力端側と出力端側とがトランスにより電気的に絶縁されてなるフライバックコンバータを含む
ことを特徴とする請求項1乃至4のいずれか1項に記載の照明用光源。 - 前記回路基板は、前記トランスの1次コイルを含む回路が形成された領域と前記トランスの2次コイルを含む回路が形成された領域との間に厚み方向に貫通するスリットが形成されてなる
ことを特徴とする請求項5記載の照明用光源。 - 定格電圧は、220V乃至250Vである
ことを特徴とする請求項1乃至6のいずれか1項に記載の照明用光源。
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Citations (2)
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JPS6348124A (ja) * | 1986-08-13 | 1988-02-29 | ダイキン工業株式会社 | 雷サ−ジ保護装置 |
JPH10253695A (ja) * | 1997-03-14 | 1998-09-25 | Kokusai Electric Co Ltd | 絶縁耐圧試験を簡易にした機器 |
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JPS6348124A (ja) * | 1986-08-13 | 1988-02-29 | ダイキン工業株式会社 | 雷サ−ジ保護装置 |
JPH10253695A (ja) * | 1997-03-14 | 1998-09-25 | Kokusai Electric Co Ltd | 絶縁耐圧試験を簡易にした機器 |
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