JP2013051120A - Light-emitting element illumination lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting element illumination lamp device capable of improving safety and reliability by preventing influence on a main light source and a peripheral circuit by turning off the main light source when an error is detected in the main light source, and also capable of improving convenience for users and maintenance workers.SOLUTION: A light-emitting element illumination lamp device 1 comprises: a main light source unit 20 which is turned on upon receiving electric power from a first power supply unit 10; a second power supply unit 30 which is connected to an AC power supply 2 to configure a standby power supply differently from the first power supply unit 10; a sub-light source unit 40 which is turned on upon receiving electric power from the second power supply unit 30; and a main control unit 50 which performs the entire control. The main light source unit 20 comprises: a main light source 21 having a light-emitting element LED; a first constant current control unit 23 which drives the main light source 21 with constant current; and a main light source error detection unit 25 which detects an error in the main light source 21. The sub-light source unit 40 includes a sub-light source 41 (sub-light-emitting element SLED) and a second constant current control unit 43 which drives the sub-light source 41 with constant current.

Description

  The present invention relates to a light emitting element illuminating lamp device including a main light source having a light emitting element.

  Along with the technological development of light emitting elements (for example, semiconductor light emitting diodes), lighting devices that use light emitting elements instead of light bulbs or fluorescent lamps have been proposed. However, even if it is a light emitting element, abnormality does not necessarily arise at all, and since many light emitting elements are mounted, the countermeasure against generation | occurrence | production of abnormality is required.

As a prior art, a white LED drive circuit for illumination has been proposed that has been devised to cut off the current of white LEDs in a row in which an abnormal current flows when an abnormal current (current exceeding a predetermined level set in advance) is detected. Has been. (For example, refer to Patent Document 1.)
However, in an LED illuminating lamp in which a large number of LEDs are arranged, as the number of mounted LEDs increases, there is a possibility that the rate of occurrence of abnormalities such as disconnection or opening stochastically increases. Moreover, it is necessary not only to interrupt the current to the LED, but also to display an abnormal state (recognize the user and maintenance worker).

JP 2009-252344 A

  The present invention has been made in view of such a situation. When an abnormality of the main light source is detected, the main light source is turned off to prevent the influence on the main light source and peripheral circuits, thereby improving safety and reliability. In addition, the user can easily recognize the abnormal state, and the maintenance operator can accurately identify the abnormal part and easily perform the quick maintenance work. The purpose is to provide.

A light-emitting element illumination lamp device according to the present invention,
A main light source having a light emitting element, a first constant current control unit that supplies a constant current to the light emitting element, and a main light source abnormality detection unit that detects an abnormality of the main light source based on the state of the first constant current control unit And the main light source abnormality detection unit turns off the main light source based on a main light source abnormality detection signal that is output when the main light source abnormality is detected, and then power is supplied to restart the main light source. And a main control unit that performs control to turn on the main light source for a predetermined time.

  Therefore, the light emitting element illumination lamp device according to the present invention improves safety and reliability by preventing the main light source and peripheral circuits from being affected by turning off the main light source when an abnormality occurs in the main light source. When power for restarting the main light source is supplied, the main light source is turned on only for a certain period of time, so that the user can easily recognize the abnormal state, and the maintenance worker can accurately identify the abnormal part. And quick maintenance work can be easily performed, and high convenience can be realized.

  The light-emitting element illuminating lamp device according to the present invention includes a sub-light source having a sub-light-emitting element different from the main light source, and the sub-light source is turned off based on the main light source abnormality detection signal. It is characterized by being configured to be lit when lit.

  Therefore, the light-emitting element illumination lamp device according to the present invention can display an abnormal state because the sub-light source is turned on when the main light source is turned off. Even in a dark state, it is possible to ensure the necessary brightness by turning on the auxiliary light source to ensure safety.

  In the light-emitting element illuminating lamp device according to the present invention, the main light source includes a plurality of light-emitting element series portions having at least one light-emitting element and connected in parallel to each other, and the first constant current control The unit includes a plurality of constant current circuits connected to each of the plurality of light emitting element series units, and the main light source abnormality detection unit compares a state signal indicating a state of the plurality of constant current circuits with a reference signal. The light emitting element series portion is configured to detect an abnormality.

  Accordingly, the light-emitting element illuminating lamp device according to the present invention detects the abnormality of the light-emitting element series part by comparing the status signal of the plurality of constant current circuits connected to each of the plurality of light-emitting element series parts with the reference signal. Since the light source abnormality detection unit is provided, it is possible to detect an abnormality in any one of the light emitting element series units, and thus it is possible to detect an abnormality of the main light source with high accuracy.

  Moreover, in the light emitting element illuminating lamp device according to the present invention, the main light source abnormality detecting unit detects a first comparator that detects an open state of the light emitting element series part, and a second that detects a short circuit state of the light emitting element series part. And a comparator.

  Therefore, the light emitting element illumination lamp device according to the present invention includes the first comparator that detects the open state of the light emitting element series part and the second comparator that detects the short circuit state of the light emitting element series part. Since the open state and the short circuit state of the light emitting element series part can be detected together, safety and reliability can be further improved.

  In the light-emitting element illuminating lamp device according to the present invention, the main light source is supplied with electric power from a first rectifying unit included in a first power source connected to an AC power source, and the sub-light source includes the first power source. Power is supplied from a second rectification unit included in a second power supply unit that is provided separately from the AC power supply, and the main control unit is configured to be supplied with power from the second rectification unit. It is characterized by being.

  Therefore, the light-emitting element illuminating lamp device according to the present invention includes a power source of a main control unit that controls turning off of the main light source and turning on of the sub light source in response to an abnormality of the main light source, and a power source of the sub light source that turns on the sub light source. Since the second power supply unit (second rectification unit) is different from the first power supply unit (first rectification unit) that is the power source of the main light source, the reliability of the operation of the main control unit, safety, and lighting of the sub-light source Reliability can be improved.

  In the light-emitting element illuminating lamp device according to the present invention, the light-emitting element and the sub-light-emitting element are light-emitting diodes.

  Therefore, the light-emitting element illuminating lamp device according to the present invention is a illuminating lamp device that has a long lifetime, high reliability, and low power consumption because the light-emitting element and the sub-light-emitting element are formed of light-emitting diodes.

  In the light-emitting element illuminating lamp device according to the present invention, the emission wavelength of the light-emitting element and the emission wavelength of the sub-light-emitting element are different from each other.

  Therefore, the light emitting element illumination device according to the present invention can display the abnormality of the main light source easily and accurately because the emission color of the main light source is different from the emission color of the sub light source.

  The light-emitting element illuminating lamp device according to the present invention turns off the main light source based on the main light source abnormality detection signal output when the main light source abnormality detection unit detects an abnormality of the main light source, and then restarts the main light source. A main control unit that controls to turn on the light only for a certain period of time.

  Therefore, the light emitting element illumination lamp device according to the present invention improves safety and reliability by preventing the main light source and peripheral circuits from being affected by turning off the main light source when an abnormality occurs in the main light source. When power for restarting the main light source is supplied, the main light source is turned on only for a certain period of time, so that the user can easily recognize the abnormal state, and the maintenance worker can accurately identify the abnormal part. Quick maintenance work can be performed, so that it is possible to achieve high convenience.

It is a block diagram which shows the correlation of each block with which the light emitting element illuminating lamp apparatus which concerns on embodiment of this invention is provided. It is a schematic functional block diagram which shows the outline of the functional block in the main-control part with which the light emitting element illuminating device shown in FIG. 1 is provided. It is a flowchart which shows the general | schematic flow of the on / off control with respect to a main light source among the control flows performed with the light emitting element illuminating lamp apparatus shown in FIG. It is a flowchart which shows the outline | summary flow when abnormality of a main light source is detected among the control flows performed with the light emitting element illumination device 1 shown in FIG. It is a circuit diagram which shows the outline | summary of the circuit of the 1st constant current control part with which the light emitting element illuminating lamp apparatus shown in FIG. 1 is equipped, and the main light source abnormality detection part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  With reference to FIG. 1 thru | or FIG. 4, the light emitting element illuminating lamp apparatus 1 which concerns on this Embodiment is demonstrated.

  FIG. 1 is a block diagram showing the correlation between blocks included in the light-emitting element illumination lamp device 1 according to the embodiment of the present invention.

  The light-emitting element illuminating lamp device 1 according to the present embodiment receives, for example, a first power supply unit 10 connected to an AC power supply 2 (AC power supply) distributed as a commercial power supply, and power supply from the first power supply unit 10. The main light source unit 20 that is turned on, the second power source unit 30 that is connected to the AC power source 2 separately from the first power source unit 10 and constitutes a standby power source, and is supplied with power from the second power source unit 30 and is lit The auxiliary light source unit 40 and the main control unit 50 that performs overall control of the light emitting element illumination device 1 are provided. Note that on / off of the light-emitting element lighting device 1 (turning on / off the main light source 21) is controlled by the main control unit 50 that has received an instruction from the portable remote-control terminal 52 disposed outside.

  The first power supply unit 10 switches the power factor improving circuit 11 (PFC) for improving the power factor of the AC power supplied from the AC power source 2 and the AC power from the power factor improving circuit 11 to switch the power. The first power supply control unit 12 (for example, an AC / AC converter: switching power supply circuit) that performs the adjustment and the voltage conversion for the alternating current supplied from the first power supply control unit 12 (the higher voltage of the first power supply control unit 12 is The first transformer 13 that performs conversion to a low voltage suitable for the first rectifier 14) and the first transformer 13 that converts the alternating current supplied from the first transformer 13 into direct current and supplies direct current power to the main light source unit 20. 1 rectification unit 14.

  The first power supply unit 10 further controls the switching of the first power supply control unit 12 by transmitting a constant current signal Scc from the first constant current control unit 23 included in the main light source unit 20 to the first power supply control unit 12. A photocoupler 16 (PC1). The constant current signal Scc is a signal output from the first constant current control unit 23 to the first power supply control unit 12 so that the current value supplied to the light emitting element series unit 22 becomes a constant current. The voltage output from the control unit 12 is controlled.

  The photocoupler 16 converts the signal (constant current signal Scc) from the first constant current control unit 23 into an optical signal and transmits it when it is transmitted to the first power supply control unit 12. The insulation with the first power supply control unit 12 can be ensured to ensure signal transmission reliability.

  The main light source unit 20 is a light emitting element LED (Light Emitting Diode: for example, a light emitting element LED1 to a light emitting element LEDn. In the following description, when there is no need to particularly distinguish the light emitting element LED1 to the light emitting element LEDn, the light emitting element LED is simply used. A main light source 21 having a constant current, a first constant current control unit 23 that drives the main light source 21 (light emitting element LED) with a constant current, and a main light source abnormality detection unit that detects an abnormality of the main light source 21. 25.

  The first constant current control unit 23 includes a constant current circuit 24 (see FIG. 4) that is individually connected to the plurality of light emitting element series units 22 and drives each light emitting element series unit 22 with a constant current. Further, the main light source abnormality detection unit 25 detects the current state (state signal Sst (see FIG. 4)) of each constant current circuit 24, and detects an abnormality in the light emitting element series unit 22 (first constant current control unit 23). Abnormality of the main light source 21 is detected. That is, the main light source abnormality detection unit 25 detects a current state in the first constant current control unit 23 and detects an abnormality of the main light source 21 (light emitting element LED). The operation of the main light source abnormality detection unit 25 will be described in more detail with reference to FIG.

  The light emitting elements LED1,..., The light emitting element LEDn are each formed as a light emitting element series portion 22 including at least one light emitting element LED. The main light source 21 is formed by connecting a plurality of light emitting element series portions 22 in parallel. The light emitting element LED preferably emits white light for illumination, for example.

  The light emitting element series part 22 (light emitting element LED1 to light emitting element LEDn) is formed in a form in which an appropriate number of light emitting elements LED are connected in series with respect to the current and voltage supplied to ensure the illuminance according to the specifications. ing. In addition, the light emitting element series portions 22 are distributed and connected in parallel in order to secure a necessary light emitting surface, and an appropriate number of light emitting elements LED corresponding to the number of parallel connections are arranged in an appropriate design. .

  The second power supply unit 30 includes a second power supply control unit 31 (switching power supply circuit) that performs switching control on the AC power supplied from the AC power supply 2, and the AC supplied from the second power supply control unit 31. The second transformer 32 that performs voltage conversion (converts the high voltage of the second power supply controller 31 into a voltage suitable for the operation of the second rectifier 33) and the alternating current supplied from the second transformer 32 as direct current. And a second light source unit 40, a main control unit 50 (microcomputer 51), and a second rectification unit 33 that supplies DC power to the main light source abnormality detection unit 25.

  The second power supply unit 30 further processes the voltage signal processing unit 34 that processes the voltage signal Sv obtained from the output of the second rectification unit 33, and the second signal based on the signal (voltage signal Sv) from the voltage signal processing unit 34. A photocoupler 35 (PC2) for controlling the switching of the power supply control unit 31. The photocoupler 35 converts the signal (voltage signal Sv) from the voltage signal processing unit 34 into an optical signal when it is transmitted to the second power supply control unit 31, and transmits it to the voltage signal processing unit 34 and the second power supply control unit. The reliability of signal transmission can be ensured by securing the insulation with the 31.

  Since the voltage signal processing unit 34 controls the second power supply control unit 31 based on the voltage signal Sv obtained from the output (voltage) of the second rectification unit 33, the output of the second rectification unit 33 is set to a predetermined voltage value. And the auxiliary light source unit 40 is driven with high accuracy. In other words, the voltage signal processing unit 34 is configured such that the voltage supplied from the second power supply control unit 31 to the second transformation unit 32 based on the voltage signal Sv can drive the sub light source 41 (sub light emitting element SLED) with high accuracy. Thus, the voltage output from the second power supply control unit 31 is controlled via the photocoupler 35.

  Since the second power supply unit 30 is always in the on state (standby power supply) and constitutes the power supply of the main control unit 50, the main control unit 50 (microcomputer 51) is always in the standby state and the remote control terminal 52 The remote control signal Src which is an instruction from can be received at any time.

  The sub-light source unit 40 includes a sub-light source 41 (sub-light-emitting element SLED) arranged completely separate from the main light source 21, and a second constant current control unit 43 that drives the sub-light source 41 (sub-light-emitting element SLED) with a constant current. Is provided. That is, the second constant current control unit 43 can stably operate the sub light emitting element SLED by the constant current. In addition, it is preferable that the sub light emitting element SLED has a light emission wavelength different from that of the light emitting element LED and can be distinguished from the light emitting element LED.

  The main control unit 50 includes a microcomputer 51 that forms the main part of the main control unit 50 and a remote control signal Src as an instruction signal via a remote control terminal 52 that is an instruction means (control means) from the outside (user). When the remote control signal Src is an on / off (lighting / extinguishing) signal for the main light source 21, the first power supply activation signal Spc output from the microcomputer 51 is received. A photocoupler 54 (PC3) for transmitting to the power factor correction circuit 11.

  The photocoupler 54 converts the signal from the microcomputer 51 (first power supply activation signal Spc) into an optical signal when it is transmitted to the power factor correction circuit 11 and transmits it to the power factor improvement circuit 11. The reliability of signal transmission can be ensured by securing the insulation between them.

  The microcomputer 51 receives a signal (remote control signal Src) from the infrared receiving unit 53 (remote control terminal 52), a main light source abnormality detection signal Sab from the main light source abnormality detection unit 25, and a sub light source abnormality detection signal Ss3. The auxiliary light source abnormality detection signal Ss3 is a signal transmitted from the second constant current control unit 43 when an operation abnormality of the second constant current control unit 43 is detected.

  Further, the microcomputer 51 executes control for each of the first power supply unit 10, the first constant current control unit 23, the second constant current control unit 43, and the photocoupler 54 based on a computer program set (installed) in advance. To do.

  The microcomputer 51 controls the start (or stop) of the first power supply unit 10 based on the first power supply start signal Spc. That is, the first power source activation signal Spc substantially activates the first power source unit 10 based on the control on the power factor correction circuit 11 or substantially stops the first power source unit 10, thereby causing the main light source unit 20. Is turned on (light-emitting element LED is turned on) and off (light-emitting element LED is turned off).

  The microcomputer 51 can transmit the first power activation signal Spc to the power factor correction circuit 11 based on the remote control signal Src, and can control the operation of the main light source unit 20 (turning on and off of the main light source 21). it can.

  The microcomputer 51 transmits a main light source on / off signal Sf1 and a PWM control signal Sf2 to the first constant current control unit 23 to control the lighting operation and extinguishing operation of the light emitting element series unit 22 (main light source 21). To do.

  The microcomputer 51 transmits the sub light source on / off signal Ss1 and the PWM control signal Ss2 to the second constant current control unit 43 to control the lighting operation and the extinguishing operation of the sub light emitting element SLED (sub light source 41). .

  In addition, the light emitting element illuminating lamp device 1 is insulated between the primary side and the secondary side by the insulation section DL (the first transformer 13, the photocoupler 16, the second transformer 32, the photocoupler 35, and the photocoupler 54). To ensure the safety and reliability of the light-emitting element lighting device 1.

  FIG. 2 is a schematic functional block diagram showing an outline of functional blocks in the main control unit 50 provided in the light emitting element illumination device 1 shown in FIG.

  Control in the main control unit 50 is mainly executed by the microcomputer 51. The microcomputer 51 includes a CPU (Central Processing Unit), and executes various controls in the light emitting element illumination device 1 based on a preinstalled program.

  The main control unit 50 (microcomputer 51) is connected to the main light source on / off control unit 60 for controlling on / off of the main light source 21 (light emitting element LED) and the main light source 21 for adjusting the light quantity of the main light source 21. A main light source PWM control unit 61 that performs PWM (pulse width modulation: light amount adjustment), a sub light source on / off control unit 62 that controls on / off of the sub light source 41 (sub light emitting element SLED), and the light amount of the sub light source 41 The secondary light source PWM control unit 63 performs PWM (pulse width modulation: light amount adjustment) on the secondary light source 41 to adjust the secondary light source 41.

  The main light source on / off control unit 60 outputs the main light source on / off signal Sf1 to the first constant current control unit 23, and the main light source PWM control unit 61 sends the PWM control signal Sf2 to the first constant current control unit 23. Output. The main light source on / off signal Sf1 and the PWM control signal Sf2 are appropriately combined and input to the constant current circuit 24 (see FIG. 4).

  The sub light source on / off control unit 62 outputs the sub light source on / off signal Ss1 to the second constant current control unit 43, and outputs the PWM control signal Ss2 to the second constant current control unit 43. The sub-light source on / off signal Ss1 and the PWM control signal Ss2 are combined as appropriate to drive a sub-light source 41 (not shown. The basic configuration is the same as that of the constant-current circuit 24, and thus description thereof is omitted. )).

  The main control unit 50 (microcomputer 51) includes a main light source abnormality detection signal receiving unit 64 that receives a main light source abnormality detection signal Sab that is a signal from the main light source abnormality detection unit 25, and a second constant current control unit 43. A sub-light source abnormality detection signal receiving unit 65 for receiving a sub-light source abnormality detection signal Ss3 that is a signal from

  The main light source abnormality detection signal Sab is transmitted from the main light source abnormality detection unit 25 that detects an abnormality (light emitting element LED1 to light emitting element LEDn) of the light emitting element series unit 22 (light emitting element LED1 to light emitting element LEDn).

  The sub light source abnormality detection signal Ss3 is a second constant current when the second constant current control unit 43 (drive circuit included in the second constant current control unit 43) that drives the sub light source 41 (sub light emitting element SLED) is abnormal. It is transmitted from the control unit 43. When the sub light source abnormality detection signal Ss3 is received by the microcomputer 51, the sub light source on / off signal Ss1 (here, an off signal for turning off the sub light source 41) is transmitted from the microcomputer 51 to the second constant current control unit 43. Then, the sub light source unit 40 is turned off (extinguished). Thereby, the reliability with respect to abnormality of the sub light source part 40 is securable.

  The main control unit 50 includes a first power supply control signal generation unit 66, a timer unit 67, an IRD signal detection unit 68, and a first power supply activation signal generation unit 69.

  The first power supply control signal generation unit 66 receives the constant current signal Scc from the first constant current control unit 23 so that the current supplied to the light emitting element series unit 22 by the first constant current control unit 23 becomes a constant current. The first power control unit 12 is controlled via the photo coupler 16. That is, the first power supply control signal generating unit 66 is configured to optimize the output by appropriate switching control, and the light emitting element series unit 22 is driven with a constant current.

  The timer unit 67 is applied to measure the time (cycle) necessary for the control by the main control unit 50. The IRD signal detection unit 68 (remote control signal detection unit) detects the remote control signal Src from the remote control terminal 52 input via the infrared receiving unit 53 (IRD), and the process according to the content of the instruction is performed by the main control unit. 50 (microcomputer 51).

  When the remote control signal Src is an on / off (lighting / extinguishing) instruction signal for the main light source 21, the first power activation signal generator 69 transmits the first power activation signal Spc to the power factor correction circuit 11 to transmit the first power activation signal Sprc. 1 The power supply unit 10 is substantially activated. That is, when receiving the remote control signal Src (on / off signal), the first power supply activation signal generating unit 69 causes the first power supply unit 10 to function to turn on / off (turn on / off) the main light source unit 20. To do.

  FIG. 3A is a flowchart showing a schematic flow of on / off control for the main light source in the control flow executed by the light emitting element illumination device 1 shown in FIG. 1.

  FIG. 3B is a flowchart showing an outline flow when an abnormality of the main light source is detected in the control flow executed by the light emitting element illumination device 1 shown in FIG. 1.

  Based on the flow of step S2 to step S14 (FIG. 3A) and step S20 to step S34 (FIG. 3B), the main processing flow in the light emitting element illumination device 1 will be described. The processing flow from step S2 to step S34 is preinstalled in the microcomputer 51 as a computer program, and the microcomputer 51 (the main light source on / off control unit 60, the main light source on / off control unit 60) as the function realizing means shown in FIG. The light source PWM control unit 61, the first power supply activation signal generation unit 69, etc.) are executed by others.

Step S2:
It is determined by the IRD signal detector 68 (microcomputer 51) whether or not an ON signal has been received from the remote control terminal 52. Note that the ON signal in this step is a signal instructed to turn on the main light source 21 by the remote control signal Src. If no ON signal has been received (step S2: NO), the process returns to the next and waits for the next determination opportunity. When the ON signal is received (step S2: YES), the process proceeds to step S4.

Step S4:
The main control unit 50 (microcomputer 51) that has received an on signal from the outside sends an on signal (first power supply) from the main control unit 50 (microcomputer 51. first power supply activation signal generation unit 69) to the first power supply unit 10. The activation signal Spc) is transmitted. That is, the microcomputer 51 that has received the ON signal (step S2) causes the first power supply activation signal generator 69 to generate the first power supply activation signal Spc, and the first power supply activation signal generator 69 passes through the photocoupler 54. The first power supply activation signal Spc is transmitted to the power factor correction circuit 11. In response to the ON signal (first power supply activation signal Spc), the power factor correction circuit 11 operates (activates), and the first power supply unit 10 (power factor improvement circuit 11) is substantially activated. After the first power activation signal Spc is transmitted, the process proceeds to step S6.

Step S6:
Since the first power supply unit 10 (power factor correction circuit 11) is activated (operated) by the first power supply activation signal Spc, the first power supply control unit 12, the first transformer unit 13, and the first rectification unit 14 are used. Electric power is supplied to the light source unit 20. In addition to the transmission of the first power activation signal Spc, the control signal (main light source on / off signal Sf1: main light source here) from the main control unit 50 (microcomputer 51) to the main light source unit 20 (main light source 21). On signal to turn on 21) is transmitted. That is, power supply from the first power supply unit 10 to the main light source unit 20 is started, and an ON signal (lighting signal) for the main light source 21 is transmitted from the microcomputer 51 together, and the main light source 21 starts lighting.

  When the main light source 21 is turned on by the main light source on / off signal Sf1, a control signal (PWM control signal Sf2) is also transmitted from the main control unit 50 (microcomputer 51) to the main light source unit 20 (main light source 21). . That is, when the main light source 21 (light emitting element LED) is turned on, light amount adjustment (lighting adjustment) for the light emitting element LED is appropriately performed.

  Note that the PWM control signal Sf2 may be separately transmitted at different timings in response to an instruction for light amount adjustment.

  A normal lighting process is performed in the flow from step S2 to step S6. In these steps, even when an abnormality is already present in the state before lighting, the light is similarly turned on. After lighting, the process proceeds to step S8.

Step S8:
This step is a step of detecting an abnormality when an abnormality occurs in the main light source 21 during operation or when an abnormality has existed before lighting (there is an abnormality that occurred in the previous use state).

  That is, it is determined whether or not the main light source abnormality detection unit 25 detects an abnormality of the main light source 21. The determination at this time is made by transmitting a main light source abnormality detection signal Sab from the main light source abnormality detection unit 25 to the microcomputer 51. The operation of the main light source abnormality detection unit 25 will be separately described with reference to FIG.

  When no abnormality is detected (step S8: NO), the process proceeds to step S10. When an abnormality is detected (step S8: YES), the process proceeds to step S20 (FIG. 3B).

Step S10:
Since it is in the lit state, it is in a state of waiting for an instruction to maintain the lit state or turn it off. Note that a processing flow such as light amount adjustment is appropriately executed, but since there is no direct relationship with the present invention, description of the light amount adjustment is omitted.

  The microcomputer 51 determines whether or not an off signal (a remote control signal Src is a signal that instructs the main light source 21 to be turned off) is received from the remote control terminal 52.

  When the OFF signal is not received (step S10: NO), the process returns to step S8. When the off signal is received (step S10: YES), the process proceeds to step S12.

Step S12:
Since this is an instruction to shift from the normal lighting state to the extinguishing state, an off signal is transmitted from the main control unit 50 (microcomputer 51) to the first power supply unit 10 (power factor correction circuit 11). The OFF signal in this step is executed by transmitting a signal (OFF signal) obtained by inverting the first power supply activation signal Spc from the first power supply activation signal generator 69 to the power factor correction circuit 11. After transmitting an off signal from the main control unit 50 to the first power supply unit 10, the process proceeds to step S14.

  In addition, an off signal of the main light source on / off signal Sf 1 is also transmitted to the first constant current control unit 23.

Step S14:
Since the supply of power from the first power supply unit 10 to the main light source unit 20 is stopped, and the constant current driving for the light emitting element series unit 22 is stopped by the main light source on / off signal Sf1, the main light source unit 20 (main light source 21 , The light emitting element LED) is turned off (light-off state).

Step S20:
Since the main light source abnormality detection unit 25 detects the abnormality of the main light source 21, it transmits a main light source abnormality detection signal Sab to the main control unit 50 (microcomputer 51).

Step S22:
Receiving the main light source abnormality detection signal Sab, the microcomputer 51 (main control unit 50) determines whether or not the activation based on step S6 (lighting of the main light source 21) is a restart after the abnormality is detected based on the history so far. To do. Here, the restart after the abnormality is detected is a state in which the abnormality is detected at the time of the previous lighting and the light is turned on (activated) again without performing the repair process (repair).

  If it is a restart after the abnormality is detected (step S22: YES), the process proceeds to step S24. When the restart is not performed after the abnormality is detected (step S22: NO), the process proceeds to step S26. The case where the restart is not performed after the abnormality is detected is a case where the abnormality detection in step S8 is the first abnormality detection (or the first abnormality detection after the previous repair).

Step S24:
The microcomputer 51 determines whether or not a certain time has elapsed after receiving the main light source abnormality detection signal Sab (further, it is determined to be restarted after the abnormality is detected). The fixed time is set in advance as an appropriate time that does not affect the main light source and the peripheral circuit by the operation due to the restart, and is, for example, about 0.3 to several seconds. Note that the fixed time is appropriately measured by applying the timer unit 67.

  If the predetermined time has elapsed (step S24: YES), the process proceeds to step S26. If the predetermined time has not elapsed (step S24: NO), the process returns to the original and continues timing until the predetermined time is reached.

  In this step, the main control unit 50 (microcomputer 51) turns on the main light source 21 for a predetermined time while maintaining the abnormal state.

Step S26:
The microcomputer 51 transmits an off signal (a signal for turning off the first power supply unit 10 by the first power supply activation signal Spc) to the first power supply unit 10 (power factor correction circuit 11). That is, the microcomputer 51 operates the timer unit 67 from the time when the main light source abnormality detection signal Sab is received (step S22), and after a predetermined time is counted, the main power unit 50 sends the first power supply unit. An off signal to 10 is transmitted.

  In addition to the transmission of the off signal to the first power supply unit 10, the control signal (sub-light source on / off signal) is transmitted from the main control unit 50 (microcomputer 51) to the sub-light source unit 40 (sub-light source 41, sub-light emitting element SLED). Ss1: Here, an ON signal for turning on the sub-light source 41) is transmitted.

  That is, an ON signal (lighting signal) for the sub light source 41 is transmitted from the microcomputer 51 to the second constant current control unit 43 which is a drive circuit for the sub light source unit 40, and the sub light source 41 starts to light.

  When the sub light source 41 is turned on by the sub light source on / off signal Ss1, a control signal (PWM control signal Ss2) is also transmitted from the main control unit 50 (microcomputer 51) to the sub light source unit 40 (sub light source 41). . That is, when the sub light source 41 (sub light emitting element SLED) is turned on, the light amount adjustment (lighting adjustment) is performed on the sub light emitting element SLED.

  That is, when the main control unit 50 detects an abnormality by a signal from the main light source abnormality detection unit 25 and the previous abnormal state is maintained, the main control unit 50 does not immediately shut off the lighting state, but does not stop for a certain period of time. After the elapse (step S24), the main light source 21 is turned off and the sub light source 41 is turned on.

  Along with the off signal of the first power supply activation signal Spc, the off signal of the main light source on / off signal Sf1 is transmitted from the microcomputer 51 to the first constant current control unit 23, and the first constant current control unit 23 is stopped. State. Therefore, the first light source unit 10 and the first constant current control unit 23 can reliably turn the main light source 21 (main light source unit 20) into an off state (light-off state). Further, unnecessary circuit operation is prevented and power consumption is suppressed.

Step S28:
The main light source unit 20 (main light source 21: main light source 21) is controlled by the main control unit 50 by turning off the first power supply unit 10 (first constant current control unit 23) and by turning on the sub light source unit 40 (second constant current control unit 43). The light emitting element LED) is turned off (extinguished), and the sub light source unit 40 (sub light source 41: sub light emitting element SLED) is turned on (lit).

  That is, when the abnormality is inherent, the main light source unit 20 is turned off and the sub light source unit 40 is turned on after the light is turned on for a predetermined time with respect to the relighting, so that the abnormality can be notified. In addition, the lighting state of the main light source unit 20 can be grasped by lighting for a certain period of time, so that the maintenance worker can accurately identify the abnormal part and perform the maintenance work quickly, and the degree of recognition of the abnormality To improve convenience.

  Usually, the change of the lighting state in this step (stop of lighting of the main light source 21 and start of lighting of the sub light source 41. That is, the transition of the lighting state) is recognized by the user, and the maintenance worker including the user Can take measures such as repairing abnormalities.

Step S30:
The microcomputer 51 determines whether or not the remote control terminal 52 has received an off signal for the sub light source unit 40 (the remote control signal Src is an instruction to turn off the sub light source 40). When the off signal is received (step S30: YES), the process proceeds to step S32. If no OFF signal is received (step S30: NO), the process returns to step S30.

Step S32:
An off signal is transmitted from the main control unit 50 (microcomputer 51) to the sub light source unit 40. The off signal here is a signal for instructing the sub-light source on / off signal Ss1 transmitted from the microcomputer 51 to the second constant current control unit 43 to be turned off, and the second constant current control unit 43 is turned off. Thus, the supply of current to the sub light source 41 (sub light emitting element SLED) is stopped, and the PWM control signal Ss2 is stopped.

Step S34:
With the instruction in step S32, the sub light source unit 40 is turned off, and the sub light source 41 (sub light emitting element SLED) is turned off.

  FIG. 4 is a circuit diagram showing an outline of a circuit of the first constant current control unit 23 and the main light source abnormality detection unit 25 provided in the light emitting element illumination device 1 shown in FIG.

  The main light source unit 20 includes a main light source 21 having a light emitting element LED that emits light upon receiving DC power from the first rectifying unit 14, and a first constant current control unit 23 (constant current) that performs constant current driving on the main light source 21. Circuit 24) and a main light source abnormality detection unit 25 that detects an abnormality of the light emitting element LED (light emitting element series unit 22) based on the state signal Sst of the first constant current control unit 23 (constant current circuit 24).

  The main light source 21 includes a plurality of light emitting element series portions 22, and the light emitting element series portions 22 are driven with a constant current by a first constant current control unit 23. The first constant current control unit 23 includes a constant current circuit 24 disposed (connected) corresponding to the light emitting element series unit 22. That is, the light emitting element series unit 22 is individually driven with a constant current by the constant current circuit 24. The constant current circuit 24 includes a MOS field effect transistor as a switching element that controls on / off of the current path, and a resistor connected in series to the MOS field effect transistor.

  When a DC voltage signal obtained by integrating the PWM control signal Sf2 is input to the non-inverting input terminal (+) of the operational amplifier OP (operational amplifier) connected to the gate electrode of the MOS field effect transistor, the DC voltage signal and the resistance R The light amount adjustment of the light emitting element LED is executed by the current determined by the ratio.

  In the present embodiment, a state signal Sst indicating an electrical state at a connection point between the constant current circuit 24 individually connected to the light emitting element series unit 22 and the light emitting element LED (light emitting element series unit 22) is used as the main light source. By detecting by the abnormality detection unit 25, the abnormality of the light emitting element series unit 22 can be detected. As the abnormal state, there are an open state and a short circuit state of the light emitting element series part 22 (light emitting element LED).

  The main light source abnormality detection unit 25 detects the open state of the light emitting element LED by comparing with the first reference signal Vref1, and detects the short circuit state of the light emitting element LED by comparing with the second reference signal Vref2. A second comparator 27. The state signal Sst output corresponding to each of the light emitting element series units 22 is input (or input) in parallel to the first comparator 26 and the second comparator 27, respectively, and a reference signal Vref (hereinafter referred to as the first reference signal). If it is not necessary to distinguish between Vref1 and the second reference signal Vref2, it may be simply referred to as a reference signal Vref. When an abnormality is detected by comparison with the reference signal Vref, an abnormality signal is output from each of the first comparator 26 and the second comparator 27, and a main light source abnormality detection signal Sab is output from the main light source abnormality detection unit 25.

  When any one of the state signals Sst indicating the state of each of the plurality of light emitting element series units 22 connected in parallel is lower than the first reference signal Vref1, any one of the light emitting elements LED is open. Yes, when any one of the state signals Sst is higher than the second reference signal Vref2, any one of the light emitting elements LED is short-circuited. Further, at least one light emitting element LED is in the open state in the light emitting element series part 22 in the open state, and at least one light emitting element LED is in the short state in the light emitting element series part 22 in the short circuit state. It has become.

  In the present embodiment, the output of the first comparator 26 and the output of the second comparator 27 are output as a logical sum synthesis. Therefore, when an abnormality is detected in at least one of the first comparator 26 and the second comparator 27, the main light source abnormality detection signal Sab is output as an abnormality in the main light source 21.

  The first reference signal Vref1 and the second reference signal Vref2 can be appropriately set in consideration of the forward voltage (forward voltage when a predetermined current is passed) of the light emitting element LED.

  Therefore, the first comparator 26 and the second comparator 27 generate the main light source abnormality detection signal Sab when detecting either the open state or the short circuit state of any of the light emitting elements LED arranged in the main light source 21. To the main control unit 50 (microcomputer 51). The main light source abnormality detection unit 25 can detect abnormality regardless of whether the light emitting element series unit 22 is in an open state or a short circuit state, thereby improving safety and reliability.

  The main light source abnormality detection signal Sab is generated, for example, by setting the signal to the H level. Further, by appropriately setting the level of the reference signal Vref, it is possible to detect not only an open abnormality and a short circuit abnormality but also a forward voltage abnormality (Vf abnormality) of the light emitting element LED.

  As described above, the light-emitting element illuminating lamp device 1 according to the present embodiment includes the main light source 21 including the light-emitting element LED, the first constant current control unit 23 that supplies a constant current to the light-emitting element LED, and the first constant current. A main light source abnormality detection unit 25 that detects an abnormality of the main light source 21 based on the state of the control unit 23 and a main light source abnormality detection signal Sab that is output when the main light source abnormality detection unit 25 detects an abnormality of the main light source 21. The main light source 21 is turned off, and then the main control unit 50 performs control to turn on the main light source 21 for a certain time when power for restarting the main light source 21 is supplied.

  Therefore, the light emitting element illumination device 1 improves safety and reliability by preventing the main light source 21 and peripheral circuits from being affected by turning off the main light source 21 when an abnormality occurs in the main light source 21. When the power for restarting the main light source 21 is supplied, the main light source 21 is turned on only for a certain period of time, so that the user can easily recognize the abnormal state, and the maintenance worker accurately identifies the abnormal part. Since it is possible to perform specific and quick maintenance work, high convenience can be realized.

  Further, the light emitting element illumination device 1 includes a sub light source 41 having a sub light emitting element SLED different from the main light source 21, and the sub light source 41 is turned off based on the main light source abnormality detection signal Sab. It is characterized by the fact that it is sometimes turned on.

  Therefore, since the sub-light source 41 is turned on when the main light source 21 is turned off, the light emitting element illumination device 1 can display an abnormal state. Even in the dark state, it is possible to ensure the necessary brightness by turning on the auxiliary light source 41 to ensure safety.

  In the light-emitting element illumination device 1, the main light source 21 includes a plurality of light-emitting element series portions 22 (LED1 to LEDn) having at least one light-emitting element LED and connected in parallel to each other. The current control unit 23 includes a plurality of constant current circuits 24 connected to each of the plurality of light emitting element series units 22, and the main light source abnormality detection unit 25 receives a state signal Sst indicating the state of the plurality of constant current circuits 24. Compared with reference signal Vref (first reference signal Vref1 serving as a reference when detecting the open state of light emitting element series portion 22, second reference signal Vref2 serving as a reference when detecting a short circuit state of light emitting element series portion 22) Thus, the abnormality of the light emitting element series portion 22 is detected.

  Therefore, the light emitting element illumination device 1 uses the state signal Sst of the plurality of constant current circuits 24 connected to each of the plurality of light emitting element series portions 22 as the reference signal Vref (first reference signal Vref1 and second reference signal Vref2). Since the main light source abnormality detection unit 25 that detects an abnormality in the light emitting element series portion 22 is provided, the abnormality in one of the light emitting element series portions 22 can be detected. It becomes possible to detect with accuracy.

  In the light emitting element illumination lamp device 1, the main light source abnormality detection unit 25 includes a first comparator 26 that detects an open state of the light emitting element series unit 22 and a second comparator 27 that detects a short circuit state of the light emitting element series unit 22. With.

  Therefore, the light emitting element illumination lamp device 1 includes the first comparator 26 that detects the open state of the light emitting element series part 22 and the second comparator 27 that detects the short circuit state of the light emitting element series part 22. Since it is possible to detect the open state and the short-circuit state of the light emitting element series portion 22 as an abnormality, it is possible to further improve safety and reliability.

  In the light emitting element illumination device 1, the main light source 21 is supplied with power from the first rectification unit 14 included in the first power supply unit 10 connected to the AC power supply 2, and the sub light source 41 is connected to the first power supply unit 10. Power is supplied from the second rectification unit 33 included in the second power supply unit 30 provided separately from the AC power supply 2 and the main control unit 50 is configured to be supplied with power from the second rectification unit 33. It is preferable that

  Therefore, the light-emitting element illuminating lamp device 1 has a power source for the main control unit 50 that controls turning off the main light source 21 and turning on the sub light source 41 in response to an abnormality in the main light source 21, and a power source for the sub light source 41 that turns on the sub light source 41. Is the second power supply unit 30 (second rectification unit 33) different from the first power supply unit 10 (first rectification unit 14) that is the power source of the main light source 21, and thus the reliability of the operation of the main control unit 50 Performance, safety, and reliability of lighting of the auxiliary light source 41 can be improved.

  In the light emitting element illumination device 1, the light emitting element LED and the sub light emitting element SLED are preferably light emitting diodes. Accordingly, since the light emitting element illumination lamp device 1 is formed of the light emitting element LED and the sub light emitting element SLED with light emitting diodes, the light emitting element illumination lamp apparatus 1 is an illumination lamp device that has a long life, high reliability, and low power consumption.

  Moreover, in the light emitting element illuminating lamp device 1, it is preferable that the light emitting wavelength of the light emitting element LED and the light emitting wavelength of the sub light emitting element SLED are different from each other. Therefore, since the light emitting element illumination lamp device 1 makes the emission color of the main light source 21 different from the emission color of the sub light source 41, the abnormality of the main light source 21 can be displayed easily and accurately.

  In the present embodiment, the main light source 21 has been described as being turned on / off by the remote control terminal 52. However, power supply / cut-off is performed by turning on / off the AC power source 2 using a wall switch. It goes without saying that the case where the light source 21 is turned on / off is also within the scope of application of the present invention.

1 Light Emitting Element Lighting Device 2 AC Power Supply (AC Power Supply)
10 First power source 11 Power factor correction circuit (PFC)
12 1st power supply control part 13 1st transformation part 14 1st rectification part 16 Photocoupler (PC1)
DESCRIPTION OF SYMBOLS 20 Main light source part 21 Main light source 22 Light emitting element serial part 23 1st constant current control part 24 Constant current circuit 25 Main light source abnormality detection part 26 1st comparator 27 2nd comparator 30 2nd power supply part 31 2nd power supply control part 32 2nd 2 Transformer 33 Second rectifier 34 Voltage signal processor 35 Photocoupler (PC2)
40 Sub-light source unit 41 Sub-light source 43 Second constant current control unit 50 Main control unit 51 Microcomputer 52 Remote control terminal 53 Infrared receiving unit (IRD)
54 Photocoupler (PC3)
60 Main light source on / off control unit 61 Main light source PWM control unit 62 Sub light source on / off control unit 63 Sub light source PWM control unit 64 Main light source abnormality detection signal receiving unit 65 Sub light source abnormality detection signal receiving unit 66 First power source control signal Generation unit 67 Timer unit 68 IRD signal detection unit (remote control signal detection unit)
69 1st power supply starting signal generation part DL Insulation division line LED, LED1-LEDn Light emitting element OP operational amplifier Sab Main light source abnormality detection signal Scc Constant current signal Sf1 Main light source on / off signal Sf2 PWM control signal SLED Sub light emitting element Spc Activation signal Src Remote control signal Ss1 Sub-light source on / off signal Ss2 PWM control signal Ss3 Sub-light source abnormality detection signal Sst Status signal Sv Voltage signal Vref Reference signal Vref1 First reference signal Vref2 Second reference signal

Claims (7)

A main light source having a light emitting element;
A first constant current controller for supplying a constant current to the light emitting element;
A main light source abnormality detection unit that detects an abnormality of the main light source based on a state of the first constant current control unit;
When the main light source abnormality detection unit turns off the main light source based on a main light source abnormality detection signal output when detecting an abnormality of the main light source, and then when power for restarting the main light source is supplied, A light-emitting element illuminating lamp device comprising: a main control unit that performs control to turn on the main light source for a certain period of time. The light-emitting element illumination lamp device according to claim 1,
A sub light source having a sub light emitting element different from the main light source,
The sub-light source is configured to be turned on when the main light source is turned off based on the main light source abnormality detection signal. The light-emitting element illuminating lamp device according to claim 1 or 2,
The main light source includes a plurality of light emitting element series portions having at least one light emitting element and connected in parallel to each other,
The first constant current control unit includes a plurality of constant current circuits connected to each of the plurality of light emitting element series portions,
The main light source abnormality detection unit is configured to detect an abnormality of the light emitting element series unit by comparing a state signal indicating a state of the plurality of constant current circuits with a reference signal. Lamp device. The light-emitting element illumination lamp device according to claim 3,
The main light source abnormality detection unit includes: a first comparator that detects an open state of the light emitting element series part; and a second comparator that detects a short circuit state of the light emitting element series part. apparatus. The light-emitting element illumination lamp device according to any one of claims 2 to 4,
The main light source is supplied with power from a first rectification unit included in a first power source connected to an AC power source,
The sub-light source is supplied with electric power from a second rectification unit provided in a second power source unit provided separately from the first power source unit and connected to the AC power source,
The main control unit is configured to be supplied with electric power from the second rectification unit. The light-emitting element illumination lamp device according to any one of claims 2 to 5,
The light emitting device and the sub light emitting device are light emitting diodes. The light-emitting element illumination lamp device according to claim 6,
The light emitting element illuminating lamp device, wherein a light emitting wavelength of the light emitting element and a light emitting wavelength of the sub light emitting element are different from each other.

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