JP2006142187A - Ultraviolet ray emission apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet ray emission apparatus which has a simple configuration and is compact, the power consumption of which is made small and in which an exposure dose of ultraviolet rays can easily be controlled. <P>SOLUTION: This ultraviolet ray emission apparatus is provided with: an ultraviolet LED for irradiating an ultraviolet-curing adhesive with ultraviolet rays; a power source for supplying an electric current to the ultraviolet LED; and a supply amperage adjusting means for adjusting the amperage to be supplied to the ultraviolet LED from the power source. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultraviolet irradiation device.

  Conventionally, an ultraviolet irradiation device used for curing an ultraviolet curable adhesive used for a semiconductor wafer workpiece collects ultraviolet rays emitted from a light source with a parabolic mirror, etc., and then sends it to an irradiation unit with an optical fiber. After condensing with a lens, it irradiates the part which apply | coated the adhesive agent, and the high pressure mercury lamp was mainly used as the light source (refer patent document 1 and patent document 2).

  The amount of ultraviolet rays required for curing the ultraviolet curable adhesive varies depending on the components and the amount applied. Therefore, it is necessary to change the irradiation amount of ultraviolet rays according to the components of the ultraviolet curable adhesive and the amount applied.

Since the power source and control unit of the high-pressure mercury lamp emit light with high voltage and high frequency discharge, it is difficult to adjust the light amount significantly and to turn on and off in a short time, and it takes a certain time to stabilize. For this reason, it is difficult to quickly cure the ultraviolet curable adhesive by repeatedly turning it on and off. Therefore, the ultraviolet irradiation device is provided with a diaphragm mechanism and a shutter mechanism in order to adjust the amount of ultraviolet irradiation. The amount of irradiation was adjusted.
Japanese Patent Laid-Open No. 06-140172 Japanese Patent Laid-Open No. 06-196555

  However, in general, the power source and control unit of the high-pressure mercury lamp are expensive and large and take up space. In addition, the use of high voltage complicates the circuit and consumes a lot of power. Furthermore, there has been a problem that electrical noise is generated due to the use of a high voltage, causing malfunction of the apparatus.

  Further, the diaphragm mechanism and shutter mechanism for adjusting the irradiation amount of ultraviolet rays are complicated and expensive.

  An object of the present invention is to provide an ultraviolet irradiation device that is simple and compact in configuration and consumes less power, and that can easily control the amount of ultraviolet irradiation.

  Then, in order to solve the said subject, the ultraviolet irradiation device of Claim 1 is a power supply for supplying the ultraviolet-ray LED for irradiating an ultraviolet-ray to an ultraviolet curable adhesive, and the electric current supplied to the said ultraviolet LED, Supply current amount adjusting means for adjusting the amount of current supplied from the power source to the ultraviolet LED.

  According to a second aspect of the present invention, in the ultraviolet irradiation apparatus according to the first aspect, the supply current amount adjusting means is a variable constant current circuit.

  According to a third aspect of the present invention, in the ultraviolet irradiation device according to the second aspect, the variable constant current circuit has a pulse capable of changing at least one of the magnitude, frequency or duty ratio of the supplied current. A circuit is provided.

  According to a fourth aspect of the present invention, in the ultraviolet irradiation device according to any one of the first to third aspects, an output voltage of the variable constant current circuit is equal to or higher than an upper limit value in the ultraviolet LED. Is connected to a voltage detection circuit that outputs an output stop signal to the power supply and detects that the output voltage of the variable constant current circuit is lower than a lower limit value and outputs an output stop signal to the power supply. In addition, the voltage detection circuit is connected to alarm means for notifying the operator that the voltage has reached the upper limit value or lower limit value.

  According to a fifth aspect of the present invention, in the ultraviolet irradiation apparatus according to the first aspect, the supply current amount adjusting means is a current control circuit.

  According to a sixth aspect of the present invention, in the ultraviolet irradiation apparatus according to the fifth aspect, the current control circuit includes a pulse circuit capable of changing at least one of a current magnitude, a frequency, and a duty ratio. It is characterized by being.

  The invention according to claim 7 is the ultraviolet irradiation device according to claim 5 or 6, wherein the light receiving sensor for receiving the ultraviolet light emitted from the ultraviolet LED and the illuminance of the ultraviolet light received by the light receiving sensor are detected. And an illuminance detection circuit for determining whether the detected illuminance of the ultraviolet ray is within a set value range, and the illuminance detection circuit does not have the ultraviolet ray irradiated from the ultraviolet LED within the set value range. An alarm means for informing the operator of this fact is connected.

  According to the first aspect of the present invention, since the ultraviolet LED is used as the light source of the ultraviolet irradiation device, the power supply and the control device can be downsized and made inexpensive.

  In addition, according to the first aspect of the invention, unlike the case of the high-pressure mercury lamp, it is not necessary to use a high voltage, so that the power consumption can be reduced, so that the running cost can be reduced.

  According to the first aspect of the present invention, the ultraviolet LED can ensure the stability of the illuminance in a short time, and can be repeatedly turned on and off and irradiated by changing the magnitude of the current for supplying the light amount. Since the amount of light can be easily adjusted, the amount of ultraviolet rays and the illuminance applied to the workpiece can be easily controlled.

  According to the second aspect of the present invention, by using a variable constant current circuit as the supply power amount adjusting means, it is possible to set the range for changing the magnitude of the supplied current to a safe range in advance. It is possible to prevent the device from being damaged by preventing an excessive current from flowing.

  In addition, according to the second aspect of the present invention, by using the variable constant current circuit, a range in which the magnitude of the supplied current can be changed can be set in advance. Can be adjusted.

According to the invention described in claim 3, since it is possible to perform pulsed emission by providing a pulse circuit in the variable constant current circuit, it is possible to irradiate ultraviolet rays with high illuminance by flowing a large current to the ultraviolet LEDs. Therefore, since the heat generation of the ultraviolet LED can be suppressed, the apparatus can be prevented from being deteriorated and the ultraviolet curable adhesive can be effectively irradiated with the ultraviolet ray.
Depending on the type of UV curable adhesive, there are those that effectively accelerate curing when irradiated with ultraviolet rays with a certain level of illuminance, as well as the accumulated light intensity, in the surface layer that touches the air and in the deep layer that touches the workpiece. It is effective for curing an ultraviolet curable adhesive having such characteristics.

  According to the fourth aspect of the present invention, the upper limit value and the lower limit value of the output voltage of the variable constant current circuit are stored in the voltage detection circuit in advance. In the case of short-circuiting above the lower limit value, the abnormality can be detected immediately.

  Further, according to the invention described in claim 4, since the output of the power supply is stopped immediately when an abnormality occurs, it is safe without the risk of damage to the device or fire due to accidents during use or incorrect wiring. An apparatus can be provided, adhesion failure due to non-irradiation or irradiation failure can be prevented, and a product with high quality can be provided.

  According to the fifth aspect of the present invention, it is possible to set the magnitude of the supplied current to a safe level by using the current control circuit as the supplied power amount adjusting means, and an excessive current is caused by an erroneous operation. It is possible to prevent the device from being damaged by being prevented from flowing.

  According to the invention described in claim 6, since it is possible to perform pulsed light emission by providing a pulse circuit in the current control circuit, it is possible to irradiate ultraviolet rays with high illuminance by flowing a large current to the ultraviolet LEDs. However, since the heat generation of the ultraviolet LED can be pushed, deterioration of the apparatus can be prevented and the ultraviolet curable LED can be effectively irradiated with the ultraviolet ray.

  According to the invention described in claim 7, the ultraviolet irradiance in the manufacturing process of the product that is produced by irradiating the ultraviolet ray with the ultraviolet irradiation device by providing the ultraviolet irradiation device with means for detecting the illuminance of the illuminance of the ultraviolet LED. It is possible to save the number of times of measurement and confirmation of whether or not ultraviolet rays are irradiated to a necessary extent and time for the confirmation.

 [First embodiment]

  Hereinafter, a first embodiment of an ultraviolet irradiation device according to the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  FIG. 1 is a schematic cross-sectional view of a main part of the ultraviolet irradiation device 1, and FIG. 2 is an example of a circuit diagram of the ultraviolet irradiation device 1.

  As shown in FIG. 1, the ultraviolet irradiation device 1 includes an ultraviolet LED 2 as a light source supported by a support member 3. The support member 3 is provided with a condensing lens 5 supported by the lens support member 4 so that the condensed ultraviolet light is irradiated to the adhesive application portion.

  As shown in FIG. 2, a power source 6 and a variable constant current circuit 9 are connected to the ultraviolet LED 2.

  The variable constant current circuit 9 can determine the magnitude of the current flowing from the power source 6 to the ultraviolet LED 2 by operating an operating means (not shown) provided in the ultraviolet irradiation device 1.

  In addition, the variable constant current circuit 9 is the largest that is allowed to flow to the ultraviolet LED 2 from a current having a value that provides a minimum illuminance necessary for curing the ultraviolet curable adhesive that the ultraviolet LED 2 is to be irradiated. The magnitude of the current flowing between the current values can be adjusted.

  The variable constant current circuit 9 may include a pulse circuit. The pulse circuit can emit pulses by changing any one of the magnitude, frequency and duty ratio of the current flowing from the power source 6 to the ultraviolet LED 2.

  The variable constant current circuit 9 stops the supply of current from the power source 6 to the ultraviolet LED 2 when an output stop signal is transmitted from a voltage detection circuit 21 described later.

  Note that the variable constant current circuit is a circuit that allows a constant current to flow regardless of the magnitude of the voltage applied to both ends, and a circuit that can change the magnitude of the constant current that flows.

  Next, the operation of the invention according to the first embodiment will be described.

  After the operator operates the operation means (not shown) of the ultraviolet irradiation device 1 to activate the ultraviolet irradiation device 1, the operation means is further operated to adjust the magnitude of the current supplied to the ultraviolet LED 2 by the variable constant current circuit 9. After the setting, an operation unit (not shown) is operated to irradiate the ultraviolet curable adhesive with ultraviolet rays from the ultraviolet irradiation device 1.

  Supply of current from the power supply 6 is started in response to a control signal from the operating means. The current supplied from the power supply 6 reaches the ultraviolet LED 2 via the variable constant current circuit 9. Since the variable constant current circuit 9 is provided with a pulse circuit, the ultraviolet LED 2 starts irradiating ultraviolet rays while emitting pulses. The irradiated ultraviolet rays are condensed by the condenser lens 5, and the condensed ultraviolet rays are irradiated to the ultraviolet curable adhesive.

  As described above, according to the invention according to the first embodiment, since the ultraviolet LED 2 is used as a light source for irradiating ultraviolet rays, it is not necessary to use a high voltage unlike the case of a high-pressure mercury lamp, so that power consumption is reduced. Therefore, running costs can be reduced.

  Further, the ultraviolet LED 2 can ensure the stability of illuminance in a short time, and can be performed simply and in a short time by changing the magnitude of the current for supplying the light amount. Since the amount of light can be easily adjusted, the amount of ultraviolet rays and the illuminance applied to the workpiece can be easily controlled.

  Further, by using the variable constant current circuit 9 as the supply current amount adjusting means, the range in which the magnitude of the supplied current can be changed can be set in advance, so that the magnitude of the supplied current can be easily adjusted.

  Further, by using the variable constant current circuit 9, the range in which the magnitude of the supplied current can be changed can be set in a safe range in advance. Can be prevented from being damaged.

In addition, by providing the variable constant current circuit 9 with a pulse circuit, it is possible to perform pulsed light emission, so that a large current can be applied to the UV LED to irradiate the UV light with high illuminance while the UV LED generates heat. Since it can be pushed, the apparatus can be prevented from being deteriorated and the ultraviolet curable adhesive can be effectively irradiated with ultraviolet rays.
[Second Embodiment]

Next, a second embodiment according to the present invention will be described. In addition, in 2nd embodiment concerning this invention, description about the part which is common in 1st embodiment is abbreviate | omitted, and it demonstrates centering on a different part from 1st embodiment.
3 and 4 are examples of circuit diagrams of the ultraviolet irradiation device 10. As shown in FIGS. 3 and 4, the ultraviolet irradiation device 10 includes a plurality of units having different numbers of ultraviolet LEDs 2 together with the relay terminals 11.

  These units can be changed by operating an operating means (not shown) provided in the ultraviolet irradiation device 10. The number of relay terminals 11 and the number of units including the ultraviolet LEDs 2 are not limited to the illustrated example. Moreover, there is no restriction | limiting also in the number of ultraviolet LED2 with which a unit is equipped.

  The maximum voltage of the power source 6 is larger than the total value of the lighting voltages of the ultraviolet LEDs 2 provided in the ultraviolet irradiation device 10, and is large enough to obtain the maximum illuminance of the ultraviolet LEDs 2.

  Next, the operation of the invention according to the second embodiment will be described.

  After the operator operates the operation means (not shown) of the ultraviolet irradiation device 10 to activate the ultraviolet irradiation device 10, the operator further operates the operation means to adjust the magnitude of the current supplied to the ultraviolet LED 2 by the variable constant current circuit 9. After setting, when a unit provided with two ultraviolet LEDs 2 shown in FIG. 4 is selected from a plurality of units provided with ultraviolet LEDs 2 provided to the ultraviolet irradiation device 10 by operating the operation means, the unit is selected. Is connected to the relay terminal 11. Thereafter, the operation means is operated to irradiate the ultraviolet curable adhesive with ultraviolet rays from the ultraviolet irradiation device 10.

  Supply of current from the power supply 6 is started in response to a control signal from the operating means. The current supplied from the power source 6 reaches the ultraviolet LED 2 via the variable constant current circuit 9 and then reaches the ultraviolet LED 2 via the relay terminal 11. Since the variable constant current circuit 9 is provided with a pulse circuit, the ultraviolet LED 2 starts irradiating ultraviolet rays while emitting pulses. The irradiated ultraviolet rays are condensed by the condenser lens 5, and the condensed ultraviolet rays are irradiated to the ultraviolet curable adhesive.

As described above, according to the invention according to the second embodiment, the amount of ultraviolet rays that can be irradiated to the ultraviolet curable adhesive that is the irradiation target by changing the number of ultraviolet LEDs 2 that can perform ultraviolet irradiation. Can be easily adjusted and the number of irradiation points can be selected.
[Third embodiment]

  Next, a third embodiment according to the present invention will be described. In the third embodiment according to the present invention, the description of the parts common to the first embodiment is omitted, and the description is focused on the parts different from the first embodiment.

  FIG. 5 is an example of a circuit diagram of the ultraviolet irradiation device 20. As shown in FIG. 5, a voltage detection circuit 21 for detecting a voltage related to the ultraviolet LED is connected to the ultraviolet LED 2 of the ultraviolet irradiation device 20, and the voltage detection circuit 21 detects an abnormality in the voltage detection circuit 21. In this case, alarm means 22 is connected to notify the operator.

  The voltage detection circuit 21 is a so-called binary power supply voltage detection circuit that can detect that the output voltage is equal to or higher than a preset upper limit value and lower than a lower limit value. The upper limit value and the lower limit value are set by an operator operating an operation means (not shown) provided in the ultraviolet irradiation device 20. The upper limit value and the lower limit value can be arbitrarily determined by the operator according to the type of ultraviolet LED used.

  The voltage detection circuit may include two voltage detection circuits that can detect only one value, and each may be connected to the alarm means 22.

  When the voltage detection circuit 21 detects a value below the lower limit value, the voltage detection circuit 21 determines that a short circuit has occurred and transmits an output stop signal to the variable constant current circuit 9.

  Further, when the voltage detection circuit 21 detects a value exceeding the upper limit value, the voltage detection circuit 21 determines that a disconnection has occurred and transmits an output stop signal to the variable constant current circuit 9.

  The alarm means 22 includes, for example, a speaker that sounds an alarm and a flashing lamp. The alarm means 22 is not limited to these, and there is no limitation as long as it can notify the operator of the abnormality.

  Next, the operation of the invention according to the third embodiment will be described.

  The operator operates the operation unit (not shown) of the ultraviolet irradiation device 20 to activate the ultraviolet irradiation device 20, and further operates the operation unit to input the upper limit value and the lower limit value of the voltage detected by the voltage detection circuit 21. To do. Further, an operation means (not shown) is operated to irradiate the ultraviolet curable adhesive with ultraviolet rays from the ultraviolet irradiation device 20.

  Supply of current from the power supply 6 is started in response to a control signal from the operating means. The current supplied from the power supply 6 reaches the ultraviolet LED 2 via the variable constant current circuit 9. Since the variable constant current circuit 9 is provided with a pulse circuit, the ultraviolet LED 2 starts irradiating ultraviolet rays while emitting pulses. The irradiated ultraviolet rays are condensed by the condenser lens 5, and the condensed ultraviolet rays are irradiated to the ultraviolet curable adhesive.

  When the voltage detection circuit 21 detects a voltage value that is greater than or equal to the upper limit value or a voltage value that is less than or equal to the lower limit value, an output stop signal is transmitted to the power source 6 to stop the supply of current to the ultraviolet LED 2 and alarm means 22 To inform the operator.

As described above, according to the invention of the third embodiment, the upper limit value and the lower limit value of the output voltage of the variable constant current circuit are stored in advance in the voltage detection circuit. When the voltage applied to the power supply exceeds the upper limit value and is short-circuited, it falls below the lower limit value, so that an abnormality can be detected immediately, and an output stop signal is issued to the power supply 6 to stop the supply of current, The occurrence of other failures that may occur in the ultraviolet irradiation device due to the disconnection can be prevented.
[Fourth embodiment]

  Next, a fourth embodiment of the ultraviolet irradiation device according to the present invention will be described. Note that in the fourth embodiment according to the present invention, description of parts common to the first embodiment will be omitted, and description will be made focusing on parts different from the first embodiment. However, the scope of the invention is not limited to the illustrated examples.

  FIG. 6 is a schematic cross-sectional view of the main part of the ultraviolet irradiation device 30, and FIG. 2 is an example of a circuit diagram of the ultraviolet irradiation device 30.

  As shown in FIG. 6, the ultraviolet irradiation device 1 includes an ultraviolet LED 2 as a light source supported by a support member 31. The support member 31 is provided with a condenser lens 5 supported by the lens support member 4.

  The ultraviolet LED support member 31 is provided with a light receiving sensor 32 that measures the illuminance of ultraviolet rays emitted from the ultraviolet LED 2.

  As shown in FIG. 7, a power source 6 and a current control circuit 33 are connected to the ultraviolet LED 2. An illuminance detection circuit 34 is connected to the current control circuit 33, and the illuminance detection circuit 34 is connected to the light receiving sensor 32 and the alarm means 22.

  The current control circuit 33 performs current control to a desired current value in accordance with a control signal from an operating means (not shown). The current control circuit 33 may use either a linear control method or a pulse width modulation method.

  Further, the current control circuit 33 may incorporate a pulse circuit. The pulse circuit can emit pulses by changing any one of the magnitude, frequency and duty ratio of the current flowing from the power source 6 to the ultraviolet LED 2.

  The means for detecting the illuminance of ultraviolet rays is one that receives and multiplies photons by, for example, a photomultiplier tube, and performs spectroscopic measurement by a photon counting method using a pulse count called a photo counting method. The ultraviolet illuminance detection means used in the present invention is not limited to the above-described one, and there is no particular limitation as long as the ultraviolet illuminance can be accurately measured.

  The illuminance detection circuit 34 stores a predetermined illuminance in advance according to a control signal from an operating means (not shown), and the illuminance detected by the light receiving sensor 32 is within a predetermined range with a width around the predetermined illuminance. If not, the current control circuit 33 is controlled to adjust the illuminance of the ultraviolet light emitted from the ultraviolet LED 2 to a predetermined value.

  The predetermined value of the illuminance of the ultraviolet light is an appropriate value for curing the ultraviolet curable adhesive, and the predetermined value of the illuminance of the ultraviolet light operates an operating means (not shown) provided in the ultraviolet irradiation device 30. It is set up by an operator.

  The illuminance detection circuit 34 is connected to an alarm means 22 such as a speaker or a lamp. When the illuminance of ultraviolet rays detected by the illuminance detection circuit 34 is not within a predetermined range, the alarm means 22 Is to inform the abnormality.

  The current control circuit 33 may be configured to adjust the irradiation time, the magnitude of the current, and the duty ratio so that the integrated light amount of the ultraviolet light irradiated to the work from the ultraviolet LED 2 becomes a predetermined value.

  That is, by operating an operating means (not shown), a signal transmitted from the light receiving sensor 32 to the illuminance detection circuit for each type of the ultraviolet curable adhesive to the current control circuit 33 and an optimum illuminance for curing the ultraviolet curable adhesive. Can be remembered. In this case, in the operation means (not shown), it is possible to select the optimum accumulated light quantity of ultraviolet rays for each type of ultraviolet curable adhesive, and adjust the irradiation time, the magnitude of the current to flow, and the duty ratio, respectively. An operating means such as a dial is provided.

  In the current control circuit 33, when any one of the irradiation time, the magnitude of the current to flow, and the duty ratio is adjusted and set to a predetermined value, the ultraviolet ray of the integrated light amount input previously is ultraviolet curable adhesive. The other two items are adjusted to irradiate the agent, and the ultraviolet curable adhesive is irradiated with the integrated light amount previously input from the ultraviolet LED 2 to the ultraviolet curable adhesive according to the adjusted contents. It is like that.

  A convenient device that can set the integrated light amount, which is the main curing condition of the adhesive, by automatically adjusting the frequency, current, and duty ratio of the pulse circuit so that the integrated light amount becomes a predetermined value in this way. Can be provided. In addition, the measurement and calculation of the integrated light quantity are unnecessary, and the work is simplified.

  Next, the operation of the fourth embodiment will be described. In the following, it is assumed that the current control circuit 33 of the ultraviolet irradiation device 30 includes a pulse circuit.

  The operator operates the operation unit (not shown) of the ultraviolet irradiation device 30 to start the ultraviolet irradiation device 30, and further operates the operation unit to transmit a control signal to the current control circuit 33 and input it to the current control circuit 33. The current control circuit 33 is operated so that the current value of the current to be output is output from the current control circuit 33 with a desired current value.

  Thereafter, a control signal for operating the operating means to supply power to the power source 6 is transmitted, and the power source 6 that has received the control signal starts supplying current. The current supplied from the power supply 6 is first input to the current control circuit 33. If the current value of the input current is not the previously set current value, a predetermined process is performed in the current control circuit 33, and then the current of the predetermined current value set is output.

  The current output from the current control circuit 33 is supplied to the ultraviolet LED 2 and starts irradiation with ultraviolet rays.

  The illuminance detection circuit 34 notifies the operator by the alarm means 22 when the value of the illuminance of the ultraviolet light emitted from the ultraviolet LED 2 deviates from a predetermined value, and controls the current control circuit 33 to emit the light from the ultraviolet LED 2. It adjusts so that the value of the illuminance of the ultraviolet rays will be a predetermined value.

  As described above, according to the invention according to the fourth embodiment, by using the current control circuit 33 as the supply current amount adjusting means, the range in which the magnitude of the supplied current can be changed can be set in advance. It is easy to adjust the magnitude of the supplied current.

  In addition, by using the current control circuit 33, it is possible to set a range in which the magnitude of the current to be supplied is changed to a safe range in advance. It can be prevented from being damaged.

  Further, the amount of ultraviolet rays irradiated by the illuminance detection circuit 34 can be automatically adjusted.

It is a schematic sectional drawing of the principal part of the ultraviolet irradiation device concerning 1st embodiment. It is an example of the circuit diagram of the ultraviolet irradiation device concerning a first embodiment. It is an example of the circuit diagram provided with the relay terminal and one ultraviolet LED of the ultraviolet irradiation device which concerns on 2nd embodiment. It is an example of the circuit diagram provided with the relay terminal and two ultraviolet LED of the ultraviolet irradiation device which concerns on 2nd embodiment. It is an example of the circuit diagram provided with the voltage detection circuit and alarm means of the ultraviolet irradiation device which concerns on 3rd embodiment. It is a schematic sectional drawing of the principal part of the ultraviolet irradiation device concerning 4th embodiment. It is an example of the circuit diagram of the ultraviolet irradiation device concerning 4th embodiment.

Explanation of symbols

1 UV irradiation device 2 UV LED
6 Power supply 9 Variable constant current circuit 10 Ultraviolet irradiation device 20 Ultraviolet irradiation device 21 Voltage detection circuit 22 Alarm means 30 Ultraviolet irradiation device 32 Light receiving sensor 33 Current control circuit 34 Illuminance detection circuit

Claims (7)

An ultraviolet LED for irradiating the ultraviolet curable adhesive with ultraviolet rays;
A power source for supplying a current to be supplied to the ultraviolet LED;
Supply current amount adjusting means for adjusting the amount of current supplied from the power source to the ultraviolet LED;
An ultraviolet irradiation device comprising: 2. The ultraviolet irradiation apparatus according to claim 1, wherein the supply current amount adjusting means is a variable constant current circuit. The ultraviolet irradiating device according to claim 2, wherein the variable constant current circuit includes a pulse circuit capable of changing at least one of a magnitude, a frequency, and a duty ratio of a current to be supplied. . The ultraviolet LED detects that the output voltage of the variable constant current circuit has exceeded the upper limit value and outputs an output stop signal to the power supply, and the output voltage of the variable constant current circuit becomes lower than the lower limit value. And a voltage detection circuit that outputs an output stop signal to the power supply is connected, and the current detection circuit indicates that the voltage has reached the upper limit value or the lower limit value. The ultraviolet irradiation device according to any one of claims 1 to 3, wherein alarm means for informing the device is connected. The ultraviolet irradiation device according to claim 1, wherein the supply current amount adjusting means is a current control circuit. 6. The ultraviolet irradiation apparatus according to claim 5, wherein the current control circuit includes a pulse circuit capable of changing at least one of a current magnitude, a frequency, and a duty ratio. A light receiving sensor that receives the ultraviolet light emitted from the ultraviolet LED, and an illuminance detection circuit that detects the illuminance of the ultraviolet light received by the light receiving sensor and determines whether the detected illuminance of the ultraviolet light is within a set value range. In addition, the illuminance detection circuit is connected to alarm means for notifying an operator that the ultraviolet ray emitted from the ultraviolet LED is not within a set value range. The ultraviolet irradiation device according to claim 6.

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