JP2010061852A - Lamp, circuit unit and light source unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp for enabling a user to easily replace only faulty one of a solid light emitting element or a lighting circuit, when the lamp fails in lighting. <P>SOLUTION: This lamp 100 has the solid light emitting element 112 as a light source, the lighting circuit 210 for turning on the solid light emitting element 112, a detecting means 220 for detecting failure of the lighting circuit 210, and an indicator 170 for notifying the failure of the lighting circuit 210 based on a detection result, and is characterized in that a light source unit 101 including at least the solid light emitting element 112 is freely attached-detached to a circuit unit 102 including at least the lighting circuit 210, and in installation operation, a first power supply terminal 144 on the circuit unit side is electrically connected to a first power receiving terminal 154 on the light source unit side, and a second power supply terminal 146 on the circuit unit side is electrically connected to a second power receiving terminal 157 on the light source unit side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lamp using a solid light-emitting element as a light source, and a circuit unit and a light source unit constituting the lamp.

2. Description of the Related Art Conventionally, solid-state light emitting devices such as light emitting diodes (LEDs), semiconductor laser diodes (LD), and electroluminescent devices (EL) have been used as lamp light sources. Solid-state light-emitting elements are environmentally friendly light sources because they do not contain harmful substances such as mercury and lead. Among lamps using a solid light emitting element as a light source, lamps having the same E-shaped base as incandescent bulbs and having the same external shape as incandescent bulbs can be used as substitutes for incandescent bulbs (Patent Documents 1 to 4). .
JP 2005-276467 A JP 2006-156187 A JP 2006-313717 A JP 2008-91140 A

The lamp is not lit due to a failure of the solid state light emitting device or a lighting circuit for lighting the solid state light emitting device. If both the solid state light emitting device and the lighting circuit are not broken, but only one of them is broken, if only the broken one is replaced, the broken one can be reused, saving resources. From the viewpoint of
However, in the conventional lamp, the solid light emitting element and the lighting circuit are enclosed in one case, and it is not easy to replace only one of the solid light emitting element or the lighting circuit. Moreover, even if it is attempted to replace only one of the solid state light emitting element or the lighting circuit, it is not easy to determine whether the lamp has become unlit due to a failure of the solid state light emitting element or the lighting circuit. Therefore, it is not easy for the user to replace only the faulty person.

  The present invention has been made to solve such a problem, and when the lamp is not lit, the user can easily replace only one of the solid-state light emitting element or the lighting circuit that has failed. The purpose is to provide. Another object of the present invention is to provide a light source unit and a circuit unit used in the replacement.

  In order to solve the above problems, a lamp according to the present invention includes a solid-state light-emitting element as a light source, a lighting circuit that lights the solid-state light-emitting element, a detection unit that detects a failure of the lighting circuit, and a detection result. And a light source unit including at least the solid-state light-emitting element is detachable from the circuit unit including at least the lighting circuit. An electrical connection between one power feeding terminal and the first power receiving terminal on the light source unit side, and an electrical connection between the second power feeding terminal on the circuit unit side and the second power receiving terminal on the light source unit side are made. .

  A circuit unit according to the present invention is a circuit unit in which a light source unit including a solid light emitting element serving as a light source is detachable, and constitutes a lamp with the light source unit in a state where the light source unit is mounted, In a mounting operation for mounting the light emitting unit, comprising a lighting circuit for lighting a solid light emitting element, a detecting means for detecting a failure of the lighting circuit, and an indicator for notifying the failure of the lighting circuit based on the detection result. Electrical connection between the first power supply terminal on the circuit unit side and the first power reception terminal on the light source unit side and electrical connection between the second power supply terminal on the circuit unit side and the second power reception terminal on the light source unit side are made. It is characterized by that.

  The light source unit according to the present invention is detachable from a circuit unit including a lighting circuit and a detection unit that detects a failure of the lighting circuit, and constitutes a lamp with the circuit unit in a state of being mounted on the circuit unit. A light source unit, comprising: a solid state light emitting device that is turned on by the lighting circuit; and an indicator that notifies a failure of the lighting circuit based on a detection result by the detection means. The electrical connection between the first power supply terminal on the unit side and the first power reception terminal on the light source unit side, and the electrical connection between the second power supply terminal on the circuit unit side and the second power reception terminal on the light source unit side are made. It is characterized by.

  The lamp according to the present invention includes detection means for detecting a failure of the lighting circuit and an indicator for notifying the failure of the lighting circuit based on the detection result. Therefore, when the lamp is not turned on, the indicator is turned on. If you are informed of a circuit failure, you know that it is due to a failure in the lighting circuit, and if the indicator does not notify you of a failure in the lighting circuit, it is not due to a failure in the lighting circuit, That is, it can be understood that this is due to the failure of the solid state light emitting device. In addition, since the light source unit including at least the solid-state light emitting element and the circuit unit including at least the lighting circuit are detachable, it is possible to easily replace only the defective one of the solid-state light emitting element or the lighting circuit. .

  Since the circuit unit according to the present invention includes a lighting circuit for lighting the solid state light emitting device, a detecting means for detecting a failure of the lighting circuit, and an indicator for notifying the failure of the lighting circuit based on the detection result, the light source When a lamp composed of a light source unit equipped with a solid state light emitting device becomes non-lighted, it can be easily understood whether or not it is caused by a failure of the lighting circuit. If it is, only the circuit unit can be easily replaced.

  The light source unit according to the present invention includes a solid-state light-emitting element that serves as a light source and an indicator that notifies a failure of the lighting circuit based on the detection result of the detection unit. When a lamp composed of a circuit unit having a detection means for detecting a failure is not lit, it can be easily understood whether or not it is caused by a failure of the solid light emitting device. If it is caused by the failure, only the light source unit can be easily replaced.

Hereinafter, an embodiment of a lamp, a light source unit, and a circuit unit according to the present invention will be described with reference to the drawings.
[First Embodiment]
<Lamp configuration>
FIG. 1 is a perspective view showing a lamp according to the first embodiment, and FIG. 2 is a longitudinal sectional view showing the lamp according to the first embodiment. As shown in FIG. 1, the lamp 100 according to the present embodiment includes an LED module 110, a base 120, a globe 130, a holder 140, a case 150, a lighting device 160, an indicator 170, and a base 180, and is a general lighting bulb. The outer shape conforms to the standard dimension, and as shown in FIG. 2, for example, the dimension L1 in the screwing axial direction (X-axis direction shown in FIG. 2) of the base 180 is 19 to 25 mm, and the direction perpendicular to the screwing axial direction The maximum dimension L2 (in the Y-axis direction shown in FIG. 2) is 12 to 39 mm. Note that the general lighting bulb is a bulb defined in JIS C 7501, for example, an incandescent bulb with a rated power of 40 W, 60 W, or 100 W. Since the shape and dimensions of the lamp 100 are as described above, the lamp 100 can be attached to an existing incandescent bulb socket and can be used as an alternative to the incandescent bulb.

  The LED module 110 is a light source of the lamp 100. For example, the substrate 111, nine LED elements 112 as solid light emitting elements mounted in a matrix on the substrate 111, and the LED elements 112 are sealed. A wavelength conversion member 113 is provided, and white light is emitted mainly in the X-axis + direction (the direction opposite to the screwing direction of the base 180). In addition, although the lamp 100 according to the present embodiment includes only one LED module 110, the lamp 100 may include a plurality of LED modules.

  The substrate 111 has, for example, a rectangular parallelepiped shape with a length of 20 to 65 mm, a width of 20 to 65 mm, and a thickness of 1 to 5 mm. The substrate 111 includes an insulating layer made of a ceramic substrate such as insulating alumina and a metal layer made of an aluminum plate or the like. It has a layer structure. In the mounting region of the substrate 111, a wiring pattern (not shown) that is electrically connected to the LED element 112 mounted in the region is formed. The wiring pattern is etched, for example, by a copper foil of about 10 μm. To form a pattern.

  Each LED element 112 has, for example, a rectangular parallelepiped shape with a length of 0.1 to 20 mm, a width of 0.1 to 20 mm, and a thickness of 0.01 to 2 mm, and has a P-type electrode and an N-type electrode on the upper surface. It is an electrode type, is bonded to a predetermined portion of the mounting region of the substrate 111, and is connected to the wiring pattern via a wire (not shown). For example, nine LED elements 112 are arranged in a matrix of 3 rows and 3 columns, and the pitch between the LED elements 112 (the distance between the centers of the LED elements 112) is, for example, 1 to 5 mm.

  The wavelength conversion member 113 has, for example, a rectangular parallelepiped shape having a length of 15 to 60 mm, a width of 15 to 60 mm, and a thickness of 1 to 5 mm, and is mixed with phosphor particles that convert output light from the LED element 112 into a desired light color. Nine LED elements 112 are sealed together in one wavelength conversion member 113. The LED module 110 is not limited to a configuration in which a plurality of LED elements 112 are collectively sealed by one wavelength conversion member 113. For example, each LED element 112 is individually sealed by different wavelength conversion members 113. It may be a structure that is stopped. In addition, as resin of the wavelength conversion member 113, an epoxy resin, a silicone resin, a polyimide, etc. can be considered.

The white light of the LED module 110 is obtained by using, for example, an InGaN-based LED element 112 having a blue emission color and a yellow-green phosphor, and a part of blue light emitted from the LED element 112 is yellow by the phosphor. The color is converted to green, and is generated by the color mixture of blue and yellow-green.
The base 120 has a disk shape with a diameter of 35 to 95 mm and a thickness of 1 to 10 mm. A wiring pattern (not shown) is formed on the surface 121 on the X axis + side, and the LED module 110 is mounted. It is a mounting surface. A pair of through holes 122 and 123 are formed in the base 120, and a pair of conducting wires 114 and 115 electrically connected to the wiring pattern are respectively connected to the X of the base 120 through the through holes 122 and 123. It is derived on the axis-side.

  The base 120 is made of a material having excellent heat dissipation such as aluminum or aluminum alloy, and serves as a heat sink. Therefore, the LED module 110 being lit can be kept at a low temperature, and thereby the light output of the LED module 110 can be improved. By using graphite as the material for the base 120, it is possible to reduce the weight while maintaining the role as a heat sink.

The globe 130 has a dome shape made of a translucent material such as a translucent resin or glass, and is disposed so as to cover the side opposite to the base 120 of the LED module 110. The end surface 131 is fixed to the X axis + side surface 121 of the base 120 by a known method such as an adhesive or a screw.
The outer surface of the globe 130 is treated with a satin finish, and the output light of the LED module 110 is diffused by the globe 130 to form a light distribution pattern close to an incandescent bulb. Further, the internal space 132 formed by the globe 130 and the base 120 is highly airtight, and the LED module 110 is not easily exposed to the outside air containing moisture or the like. The globe 130 may be fixed to the holder 140 instead of the base 120.

  The holder 140 has a bottomed cylindrical shape, and is fixed to the end surface 141 on the side having an opening by fixing the surface 124 on the X-axis side of the base 120 by a known method such as an adhesive or a screw. 120 is held. Further, a convex portion 143 that bulges to the X-axis-side is formed on the surface 142 opposite to the side having the opening of the holder 140, and the outer peripheral surface of the convex portion 143 is made of a metal ring. The male screw 144 is attached.

  The male screw 144 has conductivity, and is electrically connected to one conductive wire 114 of the LED module 110 via a through hole 145 formed at one place on the outer peripheral surface of the convex portion 143. Furthermore, one pin terminal 146 protrudes from the center of the convex portion 143 toward the X-axis side, and the other conductive wire 115 of the LED module 110 is electrically connected to the pin terminal 146. .

  The case 150 has a bottomed cylindrical shape, and the lighting device 160 and the indicator 170 are housed therein, and a base 180 is attached to an end 151 on the side having an opening. A concave portion 153 for fitting the convex portion 143 of the holder 140 is formed on the surface 152 opposite to the side having the opening of the case 150, and the inner peripheral surface of the concave portion 153 is made of metal and has a ring shape The female screw 154 is attached.

  The female screw 154 has conductivity, and is electrically connected to one of the conductive wires 161 led out from the lighting device 160 through a through hole 155 formed at one place on the inner peripheral surface of the recess 153. Further, a hole 156 into which the pin terminal 146 is inserted is formed at the center of the recess 153, and a pin receiving terminal 157 electrically connected to the other conductor 162 of the lighting device 160 is provided in the hole 156. It has been.

  The lighting device 160 includes a substrate 163, and a plurality of electronic components 164 such as a diode bridge, an electrolytic capacitor, a differential amplifier, and a microcomputer mounted on the substrate 163, and a lighting circuit 210 that lights the LED element 112; An indicator control circuit 220 is configured as detection means for detecting a failure of the lighting circuit 210. Details of the lighting circuit 210 and the indicator control circuit 220 will be described later.

  The indicator 170 is, for example, an LED module including a substrate 171, one LED element 172 mounted on the substrate 171, and a wavelength conversion member 173 that seals the LED element 172, and the indicator control circuit 220. Turns on when a failure of the lighting circuit 210 is detected to notify the user of the failure. Other configurations of the substrate 171, the LED element 172, and the wavelength conversion member 173 are substantially the same as the configurations of the substrate 111, the LED element 112, and the wavelength conversion member 113 of the LED module 110 except for the dimensions, and thus the description thereof is omitted.

The indicator 170 is disposed at a position corresponding to a translucent window 158 provided at one place on the outer peripheral surface of the case 150, and the user lights the indicator 170 from the outside of the case 150 through the window 158. You can see what happened.
The base 180 is a screw-type base standardized by JIS C 7709 that can be adapted to a socket for an incandescent bulb. For example, there are three types related to E26 (E26 / 25, E26 / 27, E26 / 30), E27 related 2 types (E27 / 25, E27 / 27) and 2 types (E39 / 41, E39 / 46) related to E39. A lead wire (not shown) of the lighting device 160 is connected to the tip portion 181 and the screw forming portion 182 of the base 180, respectively, and receives AC power input from a commercial power source at a two-point contact. The base 180 is attached to the case 150 by a known method such as adhesive or caulking.

<Removable structure of light source unit and circuit unit>
FIG. 3 is a perspective view showing the light source unit and the circuit unit according to the first embodiment, and FIG. 4 is a longitudinal sectional view showing the light source unit and the circuit unit according to the first embodiment. As shown in FIGS. 3 and 4, the lamp 100 includes a circuit unit in which a light source unit 101 including an LED module 110, a base 120, a holder 140, and a globe 130 includes a lighting device 160, an indicator 170, a case 150, and a base 180. It is detachable with respect to 102.

  As shown in FIG. 2, when the male screw 144 of the holder 140 is screwed into the female screw 154 of the case 150, the convex portion 143 of the holder 140 is fitted into the concave portion 153 of the case 150, and the pin terminal 146 of the holder 140 is inserted. It is inserted into the hole 156 of the case 150. Thus, in the mounting operation in which the light source unit 101 is mounted on the circuit unit 102, the male screw 144 and the female screw 154 are electrically connected, and the pin terminal 146 and the pin receiving terminal 157 are electrically connected. Thus, a power supply path from the lighting device 160 to the LED module 110 is secured.

  The thread groove of the female screw 154 is threaded in the same direction as the base 180. That is, when attaching the light source unit 101 to the circuit unit 102, the male screw 146 of the holder 140 is screwed into the female screw 154 of the case 150, and when the lamp 100 is attached to the lamp (not shown), the base 180 is attached to the lamp socket (not shown). The screwing direction is the same. With such a configuration, the light source unit 101 and the circuit unit 102 are not separated when the lamp 100 is attached to the lamp.

  As shown in FIG. 4, in order to separate the light source unit 101 and the circuit unit 102, the light source unit 101 is rotated with respect to the circuit unit 102, and the male screw 144 of the holder 140 and the female screw 154 of the case 150 are screwed together. Is released. Thereby, the electrical connection between the male screw 144 and the female screw 154 and the electrical connection between the pin terminal 146 and the pin receiving terminal 157 are cut off, and the power supply path from the lighting device 160 to the LED module 110 is also cut off.

<Lighting circuit and indicator control circuit>
FIG. 5 is a circuit diagram showing the lighting circuit and the indicator control circuit according to the first embodiment. As shown in FIG. 5, the lighting circuit 210 includes, for example, a rectification / smoothing circuit 211 and a constant current circuit 212.
The rectifying / smoothing circuit 211 includes a diode bridge 213 that rectifies AC power supplied from a commercial power source into DC power, an electrolytic capacitor 214 that adjusts the current value of the DC power rectified by the diode bridge 213, and the like.

The constant current circuit 212 includes resistors 215 to 217, a differential amplifier 218, a transistor 219, and the like, converts a constant voltage output from the rectifying / smoothing circuit 211 into a constant current, and applies the constant voltage to the LED element 112. The resistors 215 and 216 are connected to both ends of the DC output side of the rectifying / smoothing circuit 211, and the connection point of the resistors 215 and 216 is connected to the positive input side of the differential amplifier 218. Output voltage _{V in} the rectifying and smoothing circuit 211 is divided by the voltage dividing circuit comprising resistors 215 and 216, reference voltage _{V ref} is obtained. On the other hand, the LED element 112 side connection end of the resistor 217 connected between the rectifying / smoothing circuit 211 and the cathode terminal of the LED element 112 is connected to the negative side input terminal of the differential amplifier 218, A voltage V _{1 at the} cathode terminal is obtained.

The differential amplifier 218 compares the reference voltage V _ref with the voltage V ₁ and outputs a signal voltage V ₂ of “High” level when the former is larger than the latter and “Low” level when the former is smaller. Output terminal of the differential amplifier 218 is connected to the microcomputer 221 to be described later as the gate of the transistor 219, the transistor 219 according to the voltage level of the signal voltage V ₂ applied to the gate of the transistor 219 is turned on, turned off, turned on the period the output voltage _{V in} is applied to the LED element 112. Thus for the differential amplifier 218 controls the output current value from the rectifying and smoothing circuit 211 through the transistor 219, the voltage _{V 1} of the cathode side terminal of the LED element 112 and the reference voltage _{V ref} is equal, LED A constant current is supplied to the element 112.

The indicator control circuit 220 as detection means includes a microcomputer 221, a transistor 222 controlled by the microcomputer 221, a resistor 223, and the like. The microcomputer 221 controls the transistor 222 based on the signal voltage V ₂ output from the differential amplifier 218. If the signal voltage V ₂ is applied to the microcomputer 221, the transistor 222 is turned off, and the signal voltage V ₂ Is not applied to the microcomputer 221, the transistor 222 is turned on and the indicator 170 is lit. That is, the microcomputer 221 turns on the indicator 170 through the transistor 222 when the signal voltage V ₂ from the differential amplifier 218 is interrupted.

In this embodiment, if the interrupted signal voltage V ₂ from the differential amplifier 218, regarded as the lighting circuit has failed. For example, when the signal voltage V ₂ from the differential amplifier 218 is interrupted, the electrolytic capacitor 214 breaks down, and an input surge or the like out of the electric energy output from the electrolytic capacitor 214 is directly input to the downstream electronic component. Examples include a case where the amplifier 218 is destroyed or the differential amplifier 218 is destroyed due to other causes. Further, the signal from the differential amplifier 218 may be interrupted due to poor solder connection or the like that may occur in the entire lighting circuit 210. Although the lighting circuit is not faulty, the indicator 170 is also lit when the microcomputer 221 fails.

<Aspect of replacement of light source unit or circuit unit>
As described above, since the lamp 100 is detachable from the light source unit 101 with respect to the circuit unit 102, when one unit fails, only that unit can be replaced. Therefore, when only one of the units fails, the lamp 100 can be configured by replacing only the failed unit with a new one and diverting the other unit as it is.

  FIG. 6 is a process diagram illustrating an aspect of replacement of the light source unit or the circuit unit. As shown in FIG. 6, when the lamp 100 is used and the lamp 100 stops lighting (“NO” in step S1), the user checks whether the indicator 170 is lit (step S1). S2). If the indicator 170 is not lit, it means that the lighting circuit 210 has not failed. Therefore, it is assumed that the cause of the light source not being lit is the LED module 110, and the light source unit 101 is replaced (step S3). .

  On the other hand, if the indicator 170 is lit in step S2, the lighting circuit 210 has failed, so the circuit unit 102 is replaced (step S4). If the lamp 100 is not lit even after the circuit unit 102 is replaced (“NO” in step S5), it is assumed that the LED module 110 is also broken, and the light source unit 101 is further replaced (step S3).

[Second Embodiment]
FIG. 7 is a perspective view showing a lamp according to the second embodiment, and FIG. 8 is a longitudinal sectional view showing the lamp according to the second embodiment. As shown in FIGS. 7 and 8, the lamp 300 according to the second embodiment has a configuration in which the light source unit 301 is attached to and detached from the circuit unit 302, that is, the structure of the holder 340 and the case 350 is related to the first embodiment. The structure of the holder 140 and the case 150 of the lamp 100 is different. Hereinafter, the structure of the holder 340 and the case 350 different from those of the first embodiment will be mainly described, and the same points as those of the first embodiment will be omitted to avoid duplication. In addition, the same code | symbol is attached | subjected about the same component as 1st Embodiment.

  The holder 340 has a bottomed cylindrical shape, and a surface 124 on the X-axis side of the base 120 is fixed to an end surface 341 on the side having an opening by a known method such as an adhesive or a screw. On the end surface 342 opposite to the side having the opening of the holder 340, a convex portion 343 is formed by bulging the center toward the X axis − side, and the outer peripheral surface of the convex portion 343 is equidistantly spaced. Engaging protrusions 344 are provided at four positions with a gap.

  The engaging protrusion 344 has a hemispherical end portion 344a and protrudes from the outer peripheral surface of the convex portion 343, and the other end portion 344b is embedded in a cavity portion 345 formed on the outer peripheral surface of the convex portion 343. One end 344a is urged by the spring 346 disposed in the hollow portion 345 in a direction in which the one end portion 344a tends to protrude from the outer peripheral surface of the convex portion 343. However, the diameter of the other end portion 344b is larger than the diameter of the inlet of the cavity portion 345, and the other end portion 344b does not come out of the cavity portion 345.

A pair of pin terminals 347 and 348 project from the center of the convex portion 343 toward the Y-axis side, and the lead wires 114 and 115 of the LED module 110 are connected to the pin terminals 347 and 348, respectively. .
The case 350 has a bottomed cylindrical shape, and the lighting device 160 and the indicator 170 are accommodated therein, and a base 180 is attached to an end 351 on the side having an opening. In addition, a translucent window portion 357 is provided at one location on the outer peripheral surface of the case 350 according to the position of the indicator 170, and the user lights the indicator 170 from the outside of the case 350 through the window portion 357. You can see what happened.

  The end surface 352 opposite to the side having the opening of the case 150 is formed with a recess 353 having the center recessed into the X-axis side, and an engagement protrusion is formed on the inner peripheral surface of the recess 353. Engagement holes 354 sized so that one end portion 344a of 344 just fits are provided at four equal intervals along the inner peripheral surface. In addition, holes 355 and 356 into which the pair of pin terminals 347 and 348 are inserted are formed in the center of the recess 353, and the lead wires 161 and 162 of the lighting device 160 are connected to the holes 355 and 356, respectively. Pin receiving terminals 357 and 358 are respectively provided.

  When the light source unit 301 is attached to the circuit unit 302, the convex portion 343 of the holder 340 is fitted into the concave portion 353 of the case 350, the pin terminals 347 and 348 are inserted into the hole portions 355 and 356, and the engaging convex portion 344 is engaged. The joint hole 354 is engaged. Thereby, the pin terminals 347 and 348 and the pin receiving terminals 357 and 358 are electrically connected, and a power feeding path from the lighting device 160 to the LED module 110 is secured.

  On the other hand, when the light source unit 101 and the circuit unit 102 are separated, the pin terminals 347 and 348 are pulled out from the holes 355 and 356, the convex portion 343 of the holder 340 is taken out from the concave portion 353 of the case 350, and the engaging convex portion 344 is obtained. And the engagement hole 354 are disengaged. As a result, the pin terminals 347 and 348 and the pin receiving terminals 357 and 358 are disconnected electrically, and the power supply path from the lighting device 160 to the LED module 110 is also disconnected.

[Modification]
The lamp, the light source unit, and the circuit unit according to the present invention have been specifically described above based on the embodiments. However, the lamp, the light source unit, and the circuit unit according to the present invention are not limited to the above embodiments. For example, the following modifications can be considered.
<Indicator>
The indicator according to the present invention is not necessarily provided on the circuit unit side, and may be provided on the light source unit side. For example, it is conceivable to provide a transparent window on the outer peripheral surface of the holder and provide an indicator at a position corresponding to the window in the holder. Further, for example, it may be provided on the surface on the X axis + side of the base in the inner space of the globe. In these cases, it is conceivable to provide a connection terminal serving as a contact point for electrical connection between the indicator on the light source unit side and the lighting device on the circuit unit side in both the holder and the case.

  The indicator according to the present invention is not limited to the LED module, and may be a module using a solid light emitting element such as a semiconductor laser diode or an electroluminescent element. Further, the light emitting device is not limited to a module using a solid light emitting element, and a light emitting device capable of notifying the user of a failure by light such as a small light bulb may be used. Furthermore, the present invention is not limited to a light emitting device that can notify a failure by light, and may be a device that can notify a failure by means other than light, such as a speaker that emits a warning sound. Furthermore, the light emission color of the indicator is not limited to white, and may be a color that is easily distinguishable from the light emission color of the LED module, such as red, green, and blue.

In addition, the indicator according to the present invention is not limited to the case of being configured by one LED module, and for example, a configuration in which a plurality of LED modules are provided at equal intervals along the circumferential direction on the outer peripheral surface of the case, for example. It may be. By setting it as such a structure, when a lamp is attached to a lamp, a user can visually observe lighting of an indicator more reliably.
<Detection means>
The detection means according to the present invention is not limited to a control that turns off the indicator when the lighting circuit is normal, and controls the indicator to be turned on when the lighting circuit fails. May be controlled so that the indicator is turned off when the lighting circuit fails.

  The detection means according to the present invention may be provided on the light source unit side instead of the circuit unit side. For example, when the indicator is provided on the light source unit side, such a configuration is conceivable. In such a case, it is conceivable to provide a connection terminal serving as a contact point for electrical connection between the indicator control circuit of the light source unit and the lighting circuit 210 of the circuit unit in both the holder and the case.

In addition, the detection means according to the present invention is not limited to a configuration in which the lighting circuit is considered to have failed when the signal voltage from the differential amplifier is interrupted, but due to a failure in the lighting circuit such that the solid state light emitting device does not light up. What is necessary is just to detect the phenomenon that occurs and to regard that the lighting circuit has failed.
<Holder and case attachment / detachment structure>
The attachment / detachment structure of the holder and the case according to the present invention is not limited to the structure according to the first and second embodiments. When the light emitting unit and the light source unit are integrated, the solid light emitting element and the lighting device are electrically connected. Any configuration may be used as long as it is connected.

<Solid-state light emitting device>
The solid state light emitting device according to the present invention is not limited to an LED device, and may be a semiconductor laser diode, an electroluminescent device or the like. In addition, the light emission color of a light source such as a solid light emitting element is not limited to white, and any light emission color can be employed.
<Lighting circuit>
The lighting circuit according to the present invention is not limited to a circuit that performs constant current control, and may be a circuit that performs constant voltage control.

<Others>
In addition, the lamp, the light source unit, and the circuit unit according to the present invention may have a configuration obtained by combining a part of the configurations according to the above-described embodiments and modifications.
The lamp, the light source unit, and the circuit unit according to the present invention further include a second detection unit that detects a failure of the solid light emitting element, and a second indicator that notifies the failure of the solid light emitting element based on the detection result. It is good also as a structure provided with these. For example, as the second detection means, an optical sensor that measures the amount of light of an LED module as a light source can be considered, and when the measurement value by the optical sensor becomes a predetermined value or less, the solid state light emitting element functions as a light source. In other words, the second indicator may be turned on by assuming that the solid-state light emitting element has failed. As another example, the second detecting means may be a measuring means for measuring the current value of the LED module as the light source. When the measured value by the measuring means falls below a predetermined value, the solid state light emission It may be configured that the second indicator is turned on by regarding that the element has failed. In the case where the second indicator is provided, in order to easily distinguish the indicator from the indicator that notifies the failure of the lighting circuit, the second indicator is lit in a different color from the indicator that notifies the failure of the lighting circuit. It is conceivable that the color of the translucent window portion for use is different from the color of the indicator window portion for notifying the failure of the lighting circuit. Furthermore, it is conceivable to provide a display (for example, “light source”, “circuit”, etc.) indicating which part of the failure is notified around the window on the outer peripheral surface of the case.

  Moreover, the lamp | ramp which concerns on this invention is not limited to what has the external shape according to the specification of the light bulb for general lighting.

  The lamp, the light source unit, and the circuit unit according to the present invention can be widely used in general lighting applications.

The perspective view which shows the lamp | ramp which concerns on 1st Embodiment. 1 is a longitudinal sectional view showing a lamp according to a first embodiment. The perspective view which shows the light source unit and circuit unit which concern on 1st Embodiment. 1 is a longitudinal sectional view showing a light source unit and a circuit unit according to a first embodiment. The circuit diagram which shows the lighting circuit and indicator control circuit which concern on 1st Embodiment Process drawing explaining the mode of replacement of the light source unit or circuit unit The perspective view which shows the lamp | ramp which concerns on 2nd Embodiment. The longitudinal cross-sectional view which shows the lamp | ramp which concerns on 2nd Embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,300 Lamp 101 Light source unit 102 Circuit unit 112 Solid light emitting element 120 Base 130 Globe 140,340 Holder 144 Male screw (power receiving terminal)
146, 347, 348 pin terminals (power receiving terminals)
150, 350 Case 154 Female screw (power supply terminal)
157, 357, 358 Pin receiving terminal (power supply terminal)
170 Indicator 180 E-shaped Base 210 Lighting Circuit 218 Differential Amplifier 220 Detection Unit 221 Microcomputer 222 Transistor 344 Engagement Projection 354 Engagement Hole

Claims (9)

A solid state light emitting device as a light source, a lighting circuit for lighting the solid state light emitting device, a detection means for detecting a failure of the lighting circuit, and an indicator for notifying the failure of the lighting circuit based on the detection result,
The light source unit including at least the solid-state light emitting element is detachable from the circuit unit including at least the lighting circuit. In the mounting operation, the first power supply terminal on the circuit unit side and the first power reception terminal on the light source unit side An electrical connection and an electrical connection between the second power supply terminal on the circuit unit side and the second power reception terminal on the light source unit side are made. The light source unit includes a base on which the solid light emitting element is mounted, a holder that holds the base, and a globe that covers the solid light emitting element.
The circuit unit includes an E-shaped base electrically connected to the lighting circuit, and a case in which the lighting circuit and detection means are accommodated and the indicator and the E-shaped base are attached.
The lamp according to claim 1, wherein the lamp has an external shape conforming to a standard of a general lighting bulb in a state where the light source unit is mounted on the circuit unit. One of the first power supply terminal and the first power reception terminal is a male male screw and the other is a metal female screw, and one of the second power supply terminal and the second power reception terminal is a pin terminal. And the other is a pin receiving terminal,
In the mounting operation in which the light source unit is mounted on the circuit unit by screwing the male screw into the female screw, the male screw and the female screw are electrically connected, and the pin terminal and the pin receiving terminal are electrically connected. The lamp according to claim 2, wherein a power supply path from the lighting circuit to the solid state light emitting device is secured. One of the first power feeding terminal and the first power receiving terminal is a first pin terminal and the other is a second pin receiving terminal, and one of the second power feeding terminal and the second power receiving terminal is the first. 2 pin terminal and the other is the second pin receiving terminal,
In the mounting operation in which the light source unit is mounted on the circuit unit by engaging an engagement protrusion provided on one of the holder and the case with an engagement hole provided on the other, the first pin terminal And the first pin receiving terminal are electrically connected, and the second pin terminal and the second pin receiving terminal are electrically connected to secure a power supply path from the lighting circuit to the solid state light emitting device. The lamp according to claim 2.   The said indicator is comprised by several LED element, These LED elements are arrange | positioned at intervals along the outer peripheral surface of the said case, The Claim 1 characterized by the above-mentioned. lamp.   The lighting circuit includes a differential amplifier for constant current control, and the detection means is based on a transistor for turning on and off a voltage applied to the indicator and a voltage applied from the differential amplifier. The lamp according to claim 1, further comprising: a microcomputer that controls on and off of the transistor.   The lamp according to any one of claims 1 to 6, further comprising detection means for detecting a failure of the solid state light emitting element and an indicator for notifying the failure of the light emitting element based on the detection result. A light source unit including a solid light emitting element as a light source is detachable, and a circuit unit that constitutes a lamp with the light source unit in a state in which the light source unit is mounted,
A lighting circuit for lighting the solid state light emitting device, a detecting means for detecting a failure of the lighting circuit, and an indicator for notifying the failure of the lighting circuit based on the detection result,
In the mounting operation of mounting the light emitting unit, the electrical connection between the first power supply terminal on the circuit unit side and the first power reception terminal on the light source unit side, and the second power supply terminal on the circuit unit side and the second on the light source unit side. A circuit unit characterized in that it is electrically connected to a power receiving terminal. A light source unit that is detachable from a lighting unit and a circuit unit that includes a detection unit that detects a failure of the lighting circuit, and that constitutes a lamp with the circuit unit in a state of being mounted on the circuit unit,
A solid-state light emitting element that is turned on by the lighting circuit, and an indicator that notifies a failure of the lighting circuit based on a detection result by the detection means,
In the mounting operation for mounting to the circuit unit, the electrical connection between the first power supply terminal on the circuit unit side and the first power reception terminal on the light source unit side, and the second power supply terminal on the circuit unit side and the second on the light source unit side. A light source unit that is electrically connected to a power receiving terminal.

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