KR20200035675A - Apparatus for irradiating ultraviolet light - Google Patents

Abstract

Examples include a light irradiation unit; A driving unit driving the light irradiation unit; A detector for calculating a distance from the object; A memory for storing the distance between the object and the light irradiation unit, the irradiation amount of the light irradiation unit, and the illuminance amount; And a control unit communicating with the light irradiation unit, the driving unit, and the detection unit, and the control unit sends a control signal to the driving unit to vary the irradiation amount of the light irradiation unit to maintain a predetermined illuminance when the distance between the object and the light irradiation unit is changed. Disclosed is an ultraviolet light irradiation device for output.

Description

Ultraviolet light irradiation device {APPARATUS FOR IRRADIATING ULTRAVIOLET LIGHT}

The embodiment relates to an ultraviolet light irradiation device.

In general, a device that irradiates ultraviolet rays on a curing object to cure or bond it is called an ultraviolet curing device. At this time, the object to be cured may be a paint or adhesive that can be cured by ultraviolet light, or an opaque material.

A mercury ultraviolet lamp, a halogen lamp, or the like may be used as a light source for generating ultraviolet rays of the ultraviolet curing device, but these lamps have a problem of low efficiency and high cost.

In addition, there is a problem in that the degree of curing varies depending on the region of the object to be cured.

An embodiment provides an ultraviolet light irradiation device using a light emitting device.

In addition, an ultraviolet light irradiation device having excellent heat dissipation performance is provided.

In addition, it provides a light irradiation device that provides a uniform degree of curing.

The problem to be solved in the embodiment is not limited to this, and it will be said that the object or effect that can be grasped from the solution means or embodiment of the problem described below is also included.

The ultraviolet light irradiation device according to the embodiment includes a light irradiation unit; A driving unit driving the light irradiation unit; A detector for calculating a distance from the object; A memory for storing the distance between the object and the light irradiation unit, the irradiation amount of the light irradiation unit, and the illuminance; And a control unit communicating with the light irradiation unit, the driving unit, and the detection unit, and the control unit sends a control signal to the driving unit to vary the irradiation amount of the light irradiation unit to maintain a predetermined illuminance when the distance between the object and the light irradiation unit is changed. Output.

The detection unit includes: a transmission unit providing a transmission signal toward an object; A receiver configured to receive a received signal from the object; And a distance calculator configured to calculate a distance from the object by using time information between the transmission signal and the received signal. The received signal may be a transmission signal reflected from the object.

The transmitting unit and the receiving unit may be disposed adjacent to the light irradiation unit.

The light irradiation unit is divided into a plurality of regions,

The transmitters are respectively disposed in the plurality of regions,

The detection unit may calculate a distance from the object in each of the plurality of regions.

The control unit may calculate the irradiation amount of the light irradiation unit of the plurality of regions, and control the driving unit according to the calculated irradiation amount of the light irradiation unit of the plurality of regions.

The control unit may calculate the preset illuminance amount in correspondence to the irradiation amount of the light irradiation unit and the distance to the object.

When the distance to the calculated object is changed, the irradiation amount of the light irradiation unit may be changed.

When the distance to the calculated object increases, the irradiation amount of the light irradiation unit may decrease.

The light irradiation unit may include a plurality of ultraviolet light emitting elements.

The control unit may calculate the irradiation amount of the light irradiation unit using a regression equation reflecting the illuminance amount and the distance to the object as variables.

According to an embodiment of the present invention, it is possible to uniformly provide the curing degree of the ultraviolet light irradiation device.

In addition, an efficient curing operation can be made.

In addition, assembly of the ultraviolet light irradiation device and replacement of the circuit board can be simplified.

The various and beneficial advantages and effects of the present invention are not limited to the above, and will be more readily understood in the course of describing specific embodiments of the present invention.

1 is a configuration diagram of an ultraviolet light irradiation device according to an embodiment of the present invention,
2 is a perspective view of an ultraviolet light irradiation device according to an embodiment of the present invention,
3 is a view showing a first circuit board,
4 is a flowchart of an ultraviolet light irradiation method according to an embodiment of the present invention,
5 to 6 are views for explaining the operation of the ultraviolet light irradiation device according to an embodiment of the present invention,
7 is a view for explaining the operation of the ultraviolet light irradiation device according to another embodiment,
8 is a view showing a light guide portion and a cover,
9 is a view of the cover from a different angle,
10 is a cross-sectional view of an ultraviolet light irradiation device according to an embodiment of the present invention,
11 is a view of the heat dissipation block and the power connection in one direction,
12 is a view of the heat dissipation block and the power connection from different directions,
13 is a plan view of an ultraviolet light irradiation device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of its components between embodiments may be selectively selected. It can be used by bonding and substitution.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless specifically defined and described, can be generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as a meaning, and terms that are commonly used, such as predefined terms, may be interpreted by considering the contextual meaning of the related technology.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In the present specification, a singular form may also include a plural form unless specifically stated in the phrase, and is combined with A, B, C when described as "at least one (or more than one) of A and B, C". It can contain one or more of all possible combinations.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used.

These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component.

And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also to the component It may also include the case of 'connected', 'coupled' or 'connected' due to another component between the other components.

Further, when described as being formed or disposed in the "top (top) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is not only when the two components are in direct contact with each other, Also included is the case where one or more other components are formed or disposed between the two components. In addition, when expressed as "up (up) or down (down)", it may include the meaning of the downward direction as well as the upward direction based on one component.

1 is an exploded perspective view of an ultraviolet light irradiation device according to an embodiment of the present invention, and FIG. 2 is a perspective view of an ultraviolet light irradiation device according to an embodiment of the present invention.

1 and 2, the ultraviolet light irradiation device 10 according to an embodiment of the present invention includes a light irradiation unit 100, a driving unit 200, a control unit 300, a detection unit 400 and a memory 600 It may include.

In addition, the ultraviolet light irradiation device 10 according to an embodiment includes a housing 610, a heat radiation block 620, a first circuit board 630 disposed on one side of the heat radiation block 620, a heat radiation block 620 Cooling fan 670 is disposed on the other side of the, heat dissipation block 620 and the power connector 660 disposed between the cooling fan 670, the cover 640 disposed in front of the first circuit board 630, And it may further include a light guide portion 650. This will be described later.

First, the light irradiation unit 100 may emit light by including a plurality of light emitting elements 700. For example, the light irradiation unit 100 may irradiate light toward an object. Due to this, the object can be cured.

At this time, since the light irradiation unit 100 includes the light emitting device 700 as described above, it may be disposed in the first circuit board 630 described later.

The driving unit 200 may be connected to the light irradiation unit 100 to drive the light irradiation unit 100. That is, the driving unit 200 may supply power to the light emitting element 700 of the light irradiation unit 100 to turn on / off the light emitting element 700. For example, the driving unit 200 may supply the current amount by the control signal transmitted from the control unit 300, which will be described later, to the light irradiation unit 100. Accordingly, the illuminance of light emitted from the light irradiation unit 100 toward the object may be changed. Here, the object is the above-mentioned curing object, which is cured by the ultraviolet light irradiation device 10, and is an object to which light emitted from the light irradiation unit 100 is irradiated.

The control unit 300 is the light irradiation unit corresponding to the distance between the object and the light irradiation unit from the memory 500 to be described later, the preset illumination amount based on the irradiation amount and the illumination amount of the light irradiation unit and the calculated object The dose can be calculated. In addition, a control signal for controlling the irradiation amount of the light irradiation unit 100 may be transmitted to the driving unit 200 according to the calculated irradiation amount of the light irradiation unit. Thus, the irradiation amount of ultraviolet light can be controlled in the light irradiation unit 100. This will be described below in FIG. 4.

In addition, the controller 300 includes application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, and controllers. At least one of (controllers), microcontrollers, microprocessors, and electrical units for performing other functions may be used, but is not limited to this type.

The detector 400 may measure a distance from the object. In one example, the detector 400 includes a transmitter 410 (see FIG. 3) that provides a transmission signal toward an object, a receiver 420 (refer to FIG. 3) that receives a transmission signal (hereinafter, a reception signal) reflected from the object, and a transmission signal. And a distance calculator 430 that calculates a distance from the object using a time difference between the received signal and the received signal. In addition, the detection unit 400 may transmit the calculated distance to the control unit 300. A detailed description of this will be provided later in FIG. 3.

In addition, the detection unit 400 may be disposed adjacent to the light irradiation unit 100. Accordingly, as described above, it may be disposed on the first circuit board 630. However, it is not limited to such a position.

The memory 500 may store information about the illuminance according to the distance to the object and the irradiation amount of the light irradiation unit. This will be described in detail below in FIG. 4.

The memory 500 includes a flash memory type, a hard disk type, a multimedia card micro type, and a card type memory (for example, SD or XD memory), Magnetic Memory, Magnetic Disk, Optical Disk, Random Access Memory (RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EPMROM), Programmable Read -Only Memory).

The above-described driving unit 200, the control unit 300, and the memory 500 may be disposed on the first circuit board 630, but are not limited thereto, and may be disposed at any position in the ultraviolet light irradiation device 10. You can.

In addition, the housing 610 may have a space accommodating a plurality of parts. The material of the housing 610 is not particularly limited. For example, the housing 610 may be made of a metal material having excellent heat dissipation performance. The housing 610 may have four sides 611, 112, 113, and 114, and an opening may be formed at the rear 617 so that the cooling fan 670 can discharge air to the outside. The housing 610 may have a rectangular shape as a whole, but is not limited thereto.

The heat dissipation block 620 may include a plurality of unit blocks 621. The heat dissipation block 620 may be coupled to a plurality of unit blocks 621 to extend in one direction. In the embodiment, two unit blocks are exemplified, but the number of unit blocks may be adjusted according to the size of the curing machine.

A plurality of heat dissipation fins 622 may be disposed on the rear surface of the heat dissipation block 620. The plurality of heat dissipation fins 622 may be integrally manufactured with the heat dissipation block 620, but are not limited thereto. The plurality of heat radiation fins 622 may be separately manufactured and fixed to the rear surface of the heat radiation block 620. In this case, there is an advantage that the manufacturing of the heat dissipation block 620 is easy.

The material of the heat dissipation block 620 is not particularly limited. The heat dissipation block 620 may include a metal material having excellent thermal conductivity. Illustratively, the heat dissipation block may be copper or aluminum, but is not limited thereto. The heat radiation fin 622 may be made of the same material as the heat radiation block 620, but is not limited thereto.

A plurality of recesses 621a corresponding to pad portions (not shown) of the first circuit board 630 may be disposed on the side surface of the heat dissipation block 620. A socket portion (not shown) disposed on the rear surface of the first circuit board 630 may be exposed on the recess 621a.

A cooling fan 670 may be disposed on the other side of the heat dissipation block 620. The cooling fan 670 can quickly discharge heat emitted from the heat dissipation block 620 to the outside. A plurality of cooling fans 670 may be arranged in one direction. The number of cooling fans 670 may be appropriately adjusted according to the length of the heat dissipation block 620.

A power connection 660 may be disposed between the heat dissipation block 620 and the cooling fan 670. The power connection unit 660 includes a second circuit board 661, a plate 662 spaced vertically from the second circuit board 661, and a plurality of plates disposed between the second circuit board 661 and the plate 662 It may include a dog support member 663.

The second circuit board 661 may be electrically connected to the first circuit board 630 by a connector (not shown). The plate 662 may serve to fix the wire of the connector.

According to an embodiment, the space between the heat dissipation block 620 and the cooling fan 670 has an advantage of easy heat dissipation, and the inside of the space can be compactly disposed by disposing the power connection 660 in the space. There is an advantage.

Since the second circuit board 661 and the plate 662 of the power connection unit 660 are spaced apart in the vertical direction by a plurality of support members 663, the heat emitted from the heat dissipation block 620 is cooled by the cooling fan 670. It can be discharged outside. If the power connector 660 is arranged to block between the heat dissipation block 620 and the cooling fan 670, heat dissipation of the heat dissipation block 620 may be difficult. In addition, the temperature of the second circuit board 661 may be increased, thereby reducing electrical reliability.

The first filter 681 may be disposed above the heat dissipation block 620, and the second filter 682 may be disposed below the heat dissipation block 620. A hole 615a exposing the heat dissipation fin 622 may be formed in the housing 610. At this time, the first filter 681 and the second filter 682 may block external dust or the like from entering through the hole 615a.

The first filter 681 and the second filter 682 may be porous filters, but are not limited thereto. The first filter 681 and the second filter 682 may include both general dust filters.

The first circuit board 630 may be disposed in front of the heat dissipation block 620. The first circuit board 630 may be extended in one direction by combining a plurality of unit substrates. A plurality of ultraviolet light emitting elements 700 may be disposed on each unit substrate. The first circuit board 630 may be a printed circuit board (PCB) or a metal PCB, but is not limited thereto.

The cover 640 may be disposed in front of the first circuit board 630. The cover 640 may include a first fixing frame 641 and a second fixing frame 642 and a light transmitting plate 643. The light-transmitting plate 643 may include a material that can transmit ultraviolet light.

The light-transmitting plate 643 may be made of light-transmitting glass or quartz (quartz), but is not limited thereto. The light-transmitting plate 643 may have a UV transmittance of 90% to 99%, but is not limited thereto.

The light guide unit 650 may be disposed in front of the cover 640 to protect the cover 640 and control the directivity of ultraviolet light. While the first surface 651 and the second surface 652 of the light guide portion 650 are formed to be inclined, the third surface 653 and the fourth surface 654 may not be inclined. According to this configuration, while the directional angle is widened in the vertical direction (Z-axis direction), the directional angle may be relatively narrow in the horizontal direction (Y-axis direction). However, the present invention is not limited thereto, and the third surface 653 and the fourth surface 654 may also be formed to be inclined.

3 is a view showing a first circuit board and an ultraviolet light emitting device.

Referring to FIG. 3, the first circuit board 630 may be formed of a plurality of unit substrates. A plurality of ultraviolet light emitting elements 700 may be disposed on the plurality of unit substrates. Also, a circuit pattern (not shown) electrically connected to the plurality of ultraviolet light emitting elements 700 and a plurality of pad portions P1, P2, P3, and P4 electrically connected to the circuit pattern may be included. Although not shown, a socket portion S1 electrically connected to the plurality of pad portions P1, P2, P3, and P4 may be disposed on the rear surface of the substrate.

In the exemplary embodiment, 75 UV light emitting elements 700 are disposed on one unit substrate, but the number of light emitting elements 700 is not limited thereto. Each ultraviolet light emitting device 700 may include a package portion 710 on which light emitting diodes are disposed and a lens 720 disposed on the package portion 710.

In addition, the ultraviolet light emitting device 700 may emit ultraviolet light in the same wavelength range, but is not limited thereto. For example, the ultraviolet light emitting device 700 may include a plurality of first light emitting devices 701 and a plurality of second light emitting devices 702 that emit ultraviolet rays of different wavelengths.

For example, the wavelength of light emitted by the plurality of first light emitting elements 701 may be included in a wavelength region of 315 nm or more and less than 375 nm. In addition, wavelengths of light emitted by the plurality of second light emitting elements 702 may be included in a wavelength region of 375 nm or more and 420 nm or less.

Alternatively, the plurality of first light emitting elements 701 may emit light having a wavelength of 365 nm, and the plurality of second light emitting elements 702 may emit light having a wavelength of 385 nm.

The wavelengths of light emitted by each of the plurality of first light emitting elements 701 may be the same, and the wavelengths of light emitted by each of the plurality of second light emitting elements 702 may be the same.

Since the wavelengths of light emitted by the plurality of first light emitting elements 701 and the wavelengths of light emitted by the plurality of second light emitting elements 702 are different from each other, the light emitting module may implement a wavelength having a plurality of peaks. According to this configuration, it is possible to improve the curing properties of the UV resin by implementing a multi-wavelength. In addition to this, light emitting elements 700 emitting light having a wavelength of another wavelength band may be additionally disposed.

The plurality of first light emitting elements 701 and the second light emitting elements 702 may be individually driven. For example, the plurality of first light emitting elements 701 may be turned on, and at the same time, the plurality of second light emitting elements 702 may be turned off. Alternatively, the plurality of first light emitting elements 701 may be turned off, and at the same time, the plurality of second light emitting elements 702 may be turned on. Alternatively, the plurality of first and second light emitting elements 701 and 202 may be turned on and off at the same time.

Also, the first light emitting elements 701 may be arranged side by side in columns or rows. Likewise, the second light emitting elements 702 may be arranged side by side in columns or rows. In addition, the first light emitting element 701 and the second light emitting element 702 may be alternately arranged in columns or rows.

In addition, as described above, the light irradiation unit may also be formed as a unit irradiation unit corresponding to the unit substrate.

And, as described above, the transmitter 410, the receiver 420, and the distance calculator 430 may be disposed on the first circuit board 630, but is not limited thereto. However, for more accurate distance calculation, the transmitter 410 and the receiver 420 may be arranged in correspondence with the position of the light irradiation unit. For example, when the positions of the light irradiation unit are changed, the positions of the transmitting unit 410 and the receiving unit 420 may also be changed.

First, the transmitter 410 may provide a transmission signal toward an object. For example, the transmitter 410 may irradiate light to an object. At this time, the light emitted from the transmitter 410 may have different characteristics from the light emitted from the light irradiator. For example, light emitted from the transmitter 410 may have a different wavelength from light emitted from the light irradiator. As a result, the distance from the distance calculation unit 430 can be accurately performed by the reception unit 420 receiving the light signal received separately from the light emitted from the light irradiation unit.

The transmitter 410 may include a plurality of laser diodes. In addition, the ultraviolet light irradiation apparatus according to the embodiment may provide relatively strong power compared to the same current compared to the light emitting diode, improved detection distance, and high robustness to the outside by using a laser diode.

However, the transmitter 410 is not limited to this type, and may include various signal generators such as an ultrasonic generator.

The receiver 420 may receive a signal reflected from the object. For example, the receiver 420 may include a light-receiving element, for example, a photodiode when the transmitter 410 is an element generating the above-described optical signal.

In addition, the distance calculating unit 430 may calculate a distance to the object using time information between the transmission signal transmitted through the transmission unit 410 and the reception signal reflected by the object and received by the reception unit 420. More specifically, the distance calculator 430 may calculate a distance from the object using a time of flight (TOF) between the transmission signal and the reception signal. Here, the distance from the object may be a distance between the light irradiation unit and the object.

Further, the distance D from the object may be calculated through Equation 1 below.

Here, C is the luminous flux (3 × 10 ⁸ m / s), and TOF (Time of Flight) is the flight time (s). As described above, the detection unit 400 may calculate a distance from the object, and information on the calculated distance from the object may be transmitted to the control unit.

4 is a flowchart of a method for irradiating ultraviolet light according to an embodiment of the present invention, and FIGS. 5 to 6 are views for explaining the operation of the ultraviolet light irradiation device according to an embodiment of the present invention.

4 and 5, first, a dimming setting may be performed (S1100). The dimming setting may be an irradiation amount of the light irradiation unit 100 as a power supply amount (%) injected from the driving unit to the light irradiation unit 100. For example, when the maximum current injected into the light irradiation unit 100 is 5A, when a current of 0.5A is supplied from the driving unit to the light irradiation unit 100, dimming is set to 10%. In addition, the irradiation amount of light emitted from the light irradiation unit 100 may be changed according to the dimming setting. At this time, the dimming setting may be set by the user through an input unit (not shown).

In addition, the dimming setting may be variously changed according to the type of the target object SB, such as curing. The irradiation amount may be set to be the same for the same object SB. In addition, the irradiation amount may be set to the same for the objects SB having different types, but is not limited thereto.

In addition, the detection unit may calculate a first distance that is a distance from the object SB (S1200). That is, light is emitted from the light irradiation unit 100 in response to the current according to the dimming setting, and the distance to the object (the first distance) may be calculated by the detection unit. The first distance calculation may be performed after the dimming setting. And the first distance calculated by the detection unit may be transmitted to the control unit.

Also, the transmitter 410 and the receiver 420 may be disposed in the light irradiation unit 100. In addition, the light irradiation unit 100 may be divided into a plurality of unit irradiation units. For example, the light irradiation unit 100 may include a first unit irradiation unit 100-1, a second unit irradiation unit 100-2, a third unit irradiation unit 100-3, and a fourth unit irradiation unit 100-4. You can. This may correspond to the number of unit substrates when the first circuit board is composed of a plurality of unit substrates. For example, when a plurality of unit substrates are four, the unit irradiation unit may also be four. In addition, there may be four transmitters 410 and receivers 420 correspondingly. At this time, the distance calculator 430 may calculate the distance h from the object SB using time information of a signal received through each transmitter 410 and the receiver 420. For example, the distance calculating unit 430 may calculate the distance to the object by using the average value of the flight time between the transmission signal and the reception signal by each of the transmission unit 410 and the reception unit 420.

In addition, the control unit may perform the illuminance value output (S1300). As described above, the control unit may transmit a control signal according to the dimming setting to the driving unit to the driving unit, and the light irradiation unit 100 may output light with a corresponding light irradiation amount. In addition, the control unit may output the illumination amount (irradiation) from the object SB corresponding to the dimming setting information and the first distance based on the memory path.

As described above, the memory may store distance to the object, irradiation amount and illuminance information of the light irradiation unit, as shown in Table 1 below.

Distance to object (mm)

Dimming (%) setting 40 mm 30 mm 20 mm 10 mm 0 mm 10% 84 103 139 195 274 20% 183 226 304 425 607 30% 286 354 476 668 926 40% 387 480 645 906 1262 50% 489 605 814 1143 1602 60% 591 726 977 1371 1935 70% 689 846 1135 1603 2275 80% 780 953 1278 1804 2588 90% 859 1059 1424 2001 2911 100% 942 1163 1562 2196 3212

Referring to Table 1, Table 1 shows the amount of illuminance according to the distance (mm) and dimming (%) of the object. The illuminance amount is the irradiance value in the object as described above. And, for example, when the dimming is set to 10% and the first distance is 40 mm, the irradiance is 84 (mW / cm ² ). That is, the illuminance value is output as 84 (mW / cm ² ). In addition, the control unit may set the output illuminance value as a reference illuminance value (S1400). For example, when the dimming 10% and the first distance are set to 40 mm, the illuminance amount is 84 when there is no setting for the illuminance value thereafter. It can be set and maintained at (mW / cm ² ).

In addition, a distance ('second distance') to the object SB may be calculated. At this time, the object SB may be moved by the transportation device B. That is, the object in the step of calculating the first distance and the object in the step of calculating the second distance may be different.

The second distance may be calculated by the detector 400 in the same manner as in step S1200 of calculating the first distance.

In addition, the controller may control dimming (S1600). More specifically, the control unit calculates a dimming control value using the second distance and the illuminance amount from the set object based on the distance to the object in the memory, the irradiation amount and the illuminance amount information of the light irradiation unit 100, and controls corresponding thereto The signal can be transmitted to the driver. By such a configuration, even the movement and change (change in thickness, etc.) of the object SB may be provided with an amount of illuminance in which the object SB is smoothly cured. Thereby, a uniform curing operation can be made.

Referring to FIG. 6, light may be irradiated to the first object SB on the transportation device B. For example, the user may set the dimming to 50% to irradiate light to the first object SB. In addition, the detection unit may calculate a first distance h1 from the first object SB1. In addition, the illuminance amount may be output and set in the first object SB according to the corresponding first distance h1 and dimming (irradiation amount of the light irradiation unit). For example, when the first distance h1 is measured to be 20 mm, the irradiation amount may be set to 814 (mW / cm ² ) in the first object SB1.

In addition, the second object SB2 may be positioned in the region where the light is irradiated by the light irradiation unit 100 by the transport device B. The thickness T2 of the second object SB2 may be greater than the thickness T1 of the first object SB1. In this case, when the first object SB1 and the second object SB2 are the same material to be cured, the illuminance amount may be different due to a thickness difference (under the same dimming setting). Accordingly, the control unit may perform dimming control for the second object SB2. First, a distance (second distance h2) from the second object SB2 may be calculated through the detection unit 400. In addition, the controller may apply the second distance h2 calculated based on the set illuminance amount (eg, 814 (mW / cm ² )). And the dimming value (irradiation amount of a light irradiation part) can be calculated.

At this time, if there is no distance from the object corresponding to the illumination amount set in the memory and the irradiation amount information of the light irradiation unit, the controller may calculate a dimming value using a regression equation. For example, the control unit may be used through any one of Equation 2 and Equation 3 below.

Here, Irradiance is the amount of illuminance (on the object), WD is the distance from the object, and Dimming means the dimming value (%).

Equation 2 and Equation 3 are regression equations that derive information of the amount of illumination stored in the memory, the distance to the object, and the dimming value (the amount of irradiation of the light irradiation unit) as variables. In addition to Equations 2 and 3, the regression equation may be changed according to variables.

At this time, the control unit may derive the illuminance amount, the distance to the object, and the irradiation amount through the average values of the derived multiple regression equations. By such a configuration, the actual illuminance amount can be made uniform even when the object is changed.

7 is a view for explaining the operation of the ultraviolet light irradiation device according to another embodiment.

Referring to FIG. 7, the light irradiation unit 100 may be divided into a plurality of unit irradiation units. For example, the light irradiation unit 100 is the first unit irradiation unit 100-1, the second unit irradiation unit 100-2, and the third unit irradiation unit in order in the moving direction of the third object SB3 on the transportation device B It may include (100-3) and the fourth unit irradiation unit (100-4).

The first circuit board includes a first unit irradiation unit 100-1, a second unit irradiation unit 100-2, a third unit irradiation unit 100-3, and a fourth unit irradiation unit 100-4, respectively. It may be divided into 1 region S1 to 4th region S4. The first area S1 to the fourth area S4 may correspond to the above-described unit module.

In addition, the first areas S1 to the fourth areas S4 may include first reception units 410-1 to fourth reception units 410-4, respectively. Accordingly, a distance from the third object SB3 for each region may be calculated. For example, the third object SB3 has the same thickness T3 at positions corresponding to the first region S1 and the second region S2, and corresponds to the third region S3 and the fourth region S4. The thickness (T4) may be the same at the location. In addition, the thickness T3 may be different from the thickness T4 at positions corresponding to the third area S3 and the fourth area S4 at positions corresponding to the first area S1 and the second area S2. have. (Eg, T4> T3)

At this time, the distance h3 from the first area S1 and the second area S2 to the third object SB3 is equal to the third object SB3 from the third area S3 and the fourth area S4. It may be larger than the distance h4. Accordingly,

At this time, when the illuminance amount is set, the dimming value of the light irradiation unit may be changed to control the irradiation amount of the light irradiation unit to maintain the set illuminance amount as the third object SB3. That is, since the control unit should maintain the illuminance amount set in the third object SB3, the first unit irradiation unit 100-1, the second unit irradiation unit 100-2, the third unit irradiation unit 100-3, and the fourth unit A control signal may be transmitted to the driving unit so as to change the irradiation amount of the unit irradiation unit 100-4, and the driving unit may control the irradiation amount of each unit irradiation unit by supplying power to each unit irradiation unit in response to the control signal.

At this time, since the distance h3 from the first area S1 and the second area S2 to the third object Sb3 is the same, the irradiation amount of the first unit irradiation unit 100-1 and the second unit irradiation unit 100 The dose of -2) may be the same. In addition, since the distance h4 from the third object Sb3 in the third area S3 and the fourth area S4 is the same, the irradiation amount of the third unit irradiation unit 100-3 and the fourth unit irradiation unit 100- The dose of 4) may be the same.

However, as described above, the distance h3 from the first area S1 and the second area S2 to the third object SB3 is the third object S3 from the third area S3 and the fourth area S4. Since it is greater than the distance h4 from SB3), the first unit irradiation unit 100-1 and the second unit irradiation unit 100-2, the third unit irradiation unit 100-3, and the fourth unit irradiation unit 100-4 The dose of liver may be different. For example, the distance h3 between the third object SB3 in the first area S1 and the second area S2 is the distance from the third object SB3 in the third area S3 and the fourth area S4. Since it is larger than (h4), the irradiation amount of the first unit irradiation unit 100-1 and the second unit irradiation unit 100-2 is the irradiation amount of the third unit irradiation unit 100-3 and the fourth unit irradiation unit 100-4 Can be greater.

As such, in the light irradiation apparatus according to another embodiment, the light irradiation amount of each region of the light irradiation unit may be changed in correspondence to the distance from the object in each region of the light irradiation unit. As a result, the light irradiation device can prevent the curing of the object from being different for each region depending on the surface roughness, shape, or the like of the object. That is, it is possible to improve the uniformity of the degree of hardening in the object.

8 is a view showing a light guide portion and a cover, FIG. 9 is a view of the cover from different angles, and FIG. 10 is a cross-sectional view of an ultraviolet light irradiation device according to an embodiment of the present invention.

8 and 9, the cover 640 may include a first fixing frame 641, a second fixing frame 642, and a light transmitting plate 643. The light-transmitting plate 643 may include a material that can transmit ultraviolet light. For example, the light-transmitting plate 643 may be made of glass or quartz, but is not limited thereto. The first fixing frame 641 and the second fixing frame 642 may be made of a material having a higher coefficient of thermal expansion than the light transmitting plate 643.

The first fixing frame 641 and the second fixing frame 642 are the first fixing jaws 641b and 142b disposed on the side of the heat dissipation block 620 and the second fixing jaw 641a disposed on one surface of the heat dissipation block 620 , 142a). At this time, the first fixed jaws 641b and 142b may protrude more rearward than the second fixed jaws 641a and 142a. The first fixing jaws 641b and 142b and the second fixing jaws 641a and 142a may extend in the longitudinal direction of the cover 640.

The light guide unit 650 is disposed in front of the cover 640 to control the directivity of ultraviolet light. While the first surface 651 and the second surface 652 of the light guide portion 650 are formed to be inclined, the third surface 653 and the fourth surface 654 may not be inclined. That is, the distance between the first surface 651 and the second surface 652 is increased in a direction away from the first circuit board 630, and the distance between the third surface 653 and the fourth surface 654 is eliminated. It may be constant in a direction away from the one circuit board 630. According to such a configuration, while the directional angle is widened in the vertical direction, the directional angle may be relatively narrow in the horizontal direction. However, the present invention is not limited thereto, and the third surface 653 and the fourth surface 654 may also be formed to be inclined. At this time, the first surface 651 and the second surface 652 may be longer than the third surface 653 and the fourth surface 654.

Referring to FIG. 10, the first circuit board 630 may include support grooves 631 disposed on one surface and into which the second fixing jaws 641a and 142a are inserted. Therefore, since the first fixing frame 641 and the second fixing frame 642 are stably supported by the first circuit board 630, the light transmitting plate 643 fixed to the first fixing frame 641 and the second fixing frame 642 is fixed. It is possible to improve the problem that is damaged by the impact.

The first cover portion 615 of the housing 610 may be disposed above the first filter 681, and the second cover portion 616 may be disposed below the second filter 682. The housing may include a step portion 610a to which the end of the first cover portion is coupled. The first and second cover portions 615 and 116 may be formed with a plurality of holes so that heat of the heat dissipation fin 622 can be quickly discharged to the outside.

The power connection unit 660 may be disposed in the separation area SA between the heat dissipation block 620 and the cooling fan 670. A plurality of protrusions 614a are disposed inside the fourth surface 614 of the housing 610 to stably support the second circuit board 661. Accordingly, heat generated in the second circuit board 661 can be quickly released to the upper and lower surfaces of the second circuit board 661. The second circuit board 661 may be electrically connected to the power supply 669.

11 is a view of the heat radiation block and the power connection from one direction, FIG. 12 is a view of the heat radiation block and the power connection from another direction, and FIG. 13 is a plan view of an ultraviolet light irradiation device according to an embodiment of the present invention .

11 and 12, the plurality of connectors 664 may electrically connect the first circuit board 630 and the second circuit board 661. That is, power supplied to the power supply 669 may be applied to the first circuit board 630 through the second circuit board 661 and the connector 664.

Each connector 664 includes a first connection portion 664a electrically connected to the first circuit board 630, a second connection portion 664c electrically connected to the second circuit board 661, and a first connection portion ( 664a) and the second connecting portion 664c may include a wire 664b.

At this time, the portion where the first circuit board 630 is connected to the first connection portion 664a may be exposed by the recess 621a of the heat dissipation block 620. For example, the first connection portion 664a of the connector 664 may be inserted into and electrically connected to the socket portion exposed by the recess 621a of the heat dissipation block 620. Accordingly, the first connection portion 664a may be disposed in the recess 621a of the heat dissipation block 620.

However, the method in which the connector 664 is connected to the first circuit board 630 is not necessarily limited thereto. For example, the first connection part 664a may be inserted into the side surface of the first circuit board 630 to be electrically connected to the pad parts (P1 to P4 of FIG. 3) of the first circuit board 630. At this time, the connection between the first circuit board 630 and the connector 664 may be facilitated by the recess 621a formed in the heat dissipation block 620.

The connector 664 connected to the first circuit board 630 may be electrically connected to the second circuit board 661. Specifically, the second connection portion 664c may be inserted into the socket portion 661a disposed on the second circuit board 661.

The plate 662 may include a first plate 662a extending in a first direction and a second plate 662b protruding in a second direction perpendicular to the first direction from the first plate 662a.

The plurality of support members 663 include a plurality of first support members 663 disposed between the first plate 662a and the second circuit board 661, and the second plates 662b and the second circuit board 661 ) May include a plurality of second support members 663.

Referring to FIG. 13, a plurality of holes 662c may be disposed on the plate 662. The wire of the connector 664 may be fixed by separate fixing members 666 disposed in a plurality of holes 662c. Therefore, it is possible to prevent a problem in which the wire of the connector 654 is damaged during the external impact or the connection part is omitted. The fixing member 666 may be a plastic clip for fixing the wire, but is not limited thereto.

Further, a second connector 665 connected to the cooling fan 670 may be disposed on the second circuit board 661. The wire of the second connector 665 may also be fixed by separate fixing members 666 disposed in the plurality of holes 662c. Therefore, it is possible to prevent a problem in which the wire is broken or the connection part is dropped during an external impact.

Features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, and the like exemplified in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

Claims (10)

Light irradiation unit;
A driving unit driving the light irradiation unit;
A detector for calculating a distance from the object;
A memory for storing the distance between the object and the light irradiation unit, the irradiation amount of the light irradiation unit, and the illuminance amount; And
And a control unit communicating with the light irradiation unit, the driving unit and the detection unit,
The control unit is an ultraviolet light irradiation device for outputting a control signal to the driving unit to vary the irradiation amount of the light irradiation unit to maintain a predetermined amount of illumination when the distance between the object and the light irradiation unit is changed.
According to claim 1,
The detection unit,
A transmitter that provides a transmission signal toward an object;
A receiver configured to receive a received signal from the object; And
It includes; a distance calculating unit for calculating a distance from the object using the time information between the transmission signal and the received signal;
The received signal is an ultraviolet light irradiation device that is a transmission signal reflected from the object.
According to claim 2,
The transmitting unit and the receiving unit are ultraviolet light irradiation device disposed adjacent to the light irradiation unit.
According to claim 2,
The light irradiation unit is divided into a plurality of regions,
The transmitters are respectively disposed in the plurality of regions,
The detection unit is an ultraviolet light irradiation device for calculating the distance to the object in each of the plurality of regions.
According to claim 4,
The control unit calculates the irradiation amount of the light irradiation portion of the plurality of regions, and the ultraviolet light irradiation apparatus for controlling the driving unit according to the calculated irradiation amount of the light irradiation portion of the plurality of regions.
According to claim 1,
The control unit is an ultraviolet light irradiation device for calculating the predetermined amount of illuminance corresponding to the irradiation amount of the light irradiation unit and the distance to the object.
According to claim 1,
An ultraviolet light irradiation device in which the irradiation amount of the light irradiation unit is changed when the calculated distance to the object is changed.
The method of claim 7,
An ultraviolet light irradiation device in which the irradiation amount of the light irradiation unit decreases when the calculated distance to the object increases.
According to claim 1,
The light irradiation unit ultraviolet light irradiation device comprising a plurality of ultraviolet light emitting elements.
According to claim 1,
The control unit is an ultraviolet light irradiation device for calculating the irradiation amount of the light irradiation unit using a regression equation reflecting the distance to the object and the illuminance amount as variables.

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