KR20180083533A - Ultraviolet curing apparatus - Google Patents

Abstract

According to an embodiment of the present invention, an ultraviolet curing apparatus comprises: a stage for arranging an object to be cured; and a light emitting module arranged on the stage and including a substrate including a plurality of arrangement areas and light emitting devices arranged in the arrangement areas, respectively, wherein the arrangement areas are adjacent to vertexes of the substrate and include first arrangement areas in which the light emitting devices are arranged in a first matrix form. The first matrix is defined such that a row and a column closest to corresponding any one vertex among the vertexes of the substrate are defined as a first row and a first column, and an order of rows and columns in a direction away from the corresponding any one vertex is defined to increase. In addition, a separation distance between two adjacent light emitting devices arranged in each of the first arrangement areas is decreased as being closer to corresponding any one vertex among the vertexes of the substrate.

Description

[0001] ULTRAVIOLET CURING APPARATUS [0002]

An embodiment relates to an ultraviolet curing apparatus.

In general, a device for curing or adhering ultraviolet rays to a subject to be cured is called an ultraviolet curing device. In this case, the object to be cured may be a paint or an adhesive which can be cured by ultraviolet rays, or may be an opaque material.

A mercury ultraviolet lamp, a halogen lamp, or the like may be used as a light source for ultraviolet ray generation of such an ultraviolet curing apparatus. Such lamps are inefficient and expensive.

An ultraviolet LED (Light Emitting Diode) can be used as a light source of an ultraviolet curing device. The ultraviolet LED has a high efficiency, a relatively low cost, and a long life.

The embodiment provides an ultraviolet curing apparatus which improves the uniformity of illumination and can prevent the degradation of illumination uniformity due to the temperature gradient due to the arrangement of the light emitting elements.

An ultraviolet curing apparatus according to an embodiment includes a stage on which a curing object is placed; And a plurality of light emitting elements disposed on each of the plurality of arrangement regions, the plurality of arrangement regions being adjacent to the vertices of the substrate, Wherein the first matrix includes a plurality of first arrangement regions in which the light emitting elements are disposed in a matrix form, and wherein the first matrix is defined by a row and a column closest to a corresponding one of the vertices of the substrate as a first row and a first column And the spacing between adjacent two light emitting elements arranged in each of the first arrangement areas is defined as a corresponding one of the vertexes of the substrate The number of vertexes increases.

The plurality of arrangement regions may further include second arrangement regions spaced apart from the vertices of the substrate, in contact with the sides of the substrate, and in which the light emitting elements are arranged in a second matrix form.

The closer one of the vertices of the substrate to a corresponding one of the vertices, the smaller the spacing between adjacent two rows of the first matrix.

The closer one of the vertices of the substrate to a corresponding one of the vertices, the smaller the spacing between adjacent two columns of the first matrix.

Wherein a first spacing distance between the first row and the second row of the first matrix is less than a second spacing distance between the second row and the third row and the second spacing distance is less than a second spacing distance between the third row and the fourth row And the fourth spacing distance between the fourth row and the fifth row of the first matrix are equal to each other and the fourth spacing distance is equal to a fifth spacing distance between the fifth row and the sixth row of the first matrix .

Each of the spacing distances between adjacent two rows selected from the sixth row to the last row of the first matrix may be equal to the fifth spacing distance.

Wherein a sixth spacing distance between the first and second columns of the first matrix is less than a seventh spacing distance between the second and third columns of the first matrix and the seventh spacing distance is less than a seventh spacing distance between the third and fourth columns of the first matrix, And the eighth spacing distance is shorter than a ninth separation distance between the fourth and fifth columns of the first matrix and the second spacing distance between the adjacent two columns selected from the fifth column to the last column of the first matrix Each of the spacing distances between the columns may be equal to the ninth spacing distance.

The spacing distance between adjacent two rows of the second matrix of each of the second arrangement regions in the first direction being equal to each other and the first direction being parallel to either side of the substrate adjacent each of the second arrangement regions It can be in one direction.

The columns or rows of the second matrix of each of the second arrangement regions adjacent to either side of the sides of the substrate are arranged in rows or columns of the first matrix of the first arrangement region including vertices adjacent to either side And the first direction may be a direction parallel to either side of the substrate adjacent to each of the second arrangement regions.

The array distance and array number of columns or rows of the second matrix parallel to the second direction is equal to the array distance and array number of columns or rows of the first matrix parallel to the second direction, May be a direction perpendicular to the first direction.

The second spacing distance, the fourth spacing distance, and the fifth spacing distance with respect to the total length of any one side of the first arrangement region parallel to the row of the first matrix The ratio may be 3.18: 3.85: 3.85: 3.85: 5.77.

The ratio of the sixth spacing distance, the seventh spacing distance, the eighth spacing distance, and the ninth spacing distance to the total length of any one side of the first arrangement region parallel to the row of the first matrix is 3.81 : 5.02: 5.02: 6.58.

Wherein the ratio of the first spacing distance, the second spacing distance, the third spacing distance, the fourth spacing distance and the fifth spacing distance is x1: x2: x3: x4: x5 and x1 is 0.55 or more and less than 0.7 , And x2, x3, and x3 are each 0.7 or more and less than 1, and x5 may be 1.

Y1: y2: y3: y4; y1: not less than 0.5 and not more than 0.65; and y2 and y3: not less than 0.65, wherein the ratio of the sixth spacing distance to the seventh spacing distance, And less than 1, and y4 may be 1.

The ratio of the area of the light emitting device disposed in the plurality of arrangement areas to the area of the target area for curing the stage may be 1: 1.08 to 1: 1.37.

The ultraviolet curing apparatus according to another embodiment includes a stage for placing a curing object; And a light emitting module disposed on the stage, the light emitting module including a substrate including a plurality of arrangement regions, and light emitting elements alternately arranged in each of the plurality of arrangement regions, wherein the plurality of arrangement regions are vertexes of the substrate First arrangement regions adjacent to the light emitting elements, the first arrangement regions in which the light emitting elements are arranged in a first matrix form; Second placement regions spaced from the apexes of the substrate and in contact with the sides of the substrate and in which the light emitting elements are arranged in a second matrix form; And third arrangement regions spaced apart from the substrate vertices and sides of the substrate and in which the light emitting elements are arranged in a third matrix form, the first matrix comprising at least one of a corresponding one of the vertices of the substrate Wherein a row and a column closest to the vertex are defined as a first row and a first column and the order of rows and columns is sequentially increased in a direction away from the corresponding one of the vertices, A first group including a first row, a first group including a second through a fifth row, and a third group including a sixth through a last row, The first distance between the first group and the first group is shorter than the second distance between the first group and the first group, Spacing between two rows Li is shorter than the separation between the two rows adjoining included in the first-second group, the first distance is shorter than the second distance.

The second spacing distance may be the same as the spacing distance between two adjacent rows included in the first-third group.

The columns of the first matrix are divided into a first group including a first column, a second group including a second column and a third column, a second group including a second column and a third column, Group, the third separation distance between the second-first group and the second-second group is shorter than the fourth separation distance between the second-second group and the second-third group, and the third separation distance is divided into the second -2 group may be shorter than the separation distance between two adjacent columns included in the group.

The separation distance between two adjacent columns included in the group 2-3 may be equal to the fourth separation distance.

The spacing distances between adjacent two rows of the second matrix are equal to each other and the first spacing distance and the second spacing distance may be shorter than the spacing distance between adjacent two rows of the second matrix.

Wherein the spacing distances between adjacent two columns of the second matrix are equal to each other and the spacing distance between two adjacent columns included in the third spacing distance and the second group of 2s is equal to the distance between adjacent two columns of the second matrix May be shorter than the separation distance between the columns.

According to another embodiment of the present invention, there is provided an ultraviolet curing apparatus comprising: a stage for placing a curing object; A substrate disposed on the stage and including first placement regions, second placement regions, and third placement regions, and a second substrate having a first and second placement regions, A light emitting module including light emitting elements alternately arranged in each of the light emitting modules; And a cooling portion disposed on the light emitting module, wherein each of the first placement regions is adjacent to a corresponding one of the first vertices of the substrate, and the second placement regions are located on the first vertices of the substrate And the third arrangement regions are spaced apart from the first vertexes and sides of the substrate and the arrangement density of the light emitting elements arranged in each of the first arrangement regions is larger than the arrangement density of the first vertex The arrangement density of the light emitting elements disposed in each of the second arrangement areas increases with the adjacent sides of the first arrangement areas, the cooling part corresponds to the first arrangement areas, And first cooling blocks having second vertices corresponding to the first vertices, wherein each of the first cooling blocks includes a first body, And a first outlet for discharging fluid from the first body, wherein the first inlet is located closer to the second vertex of each of the first cooling blocks than the first outlet do.

Wherein the cooling unit further includes second cooling blocks corresponding to the second arrangement regions, each of the second cooling blocks includes a second body, a second inlet for introducing fluid into the second body, The second inlet of the second cooling blocks may be further adjacent to the sides of the second cooling blocks corresponding to the sides of the substrate than the second outlet.

The light emitting devices include a first light emitting device and a second light emitting device that are alternately arranged, and the first light emitting device and the second light emitting device can emit ultraviolet rays of different wavelengths.

The embodiment improves the uniformity of the illuminance and can prevent the degradation of the illuminance uniformity due to the temperature gradient due to the arrangement of the light emitting elements.

1 is a perspective view of an ultraviolet curing apparatus according to an embodiment.
Fig. 2 shows a cooling section, a light emitting module, and a stage shown in Fig.
Fig. 3 shows a top view of the light emitting module shown in Fig.
Fig. 4 shows the arrangement of the first light emitting element and the second light emitting element in one region of the first arrangement region shown in Fig.
5A shows a simulation result of illuminance of a light emitting module in which light emitting elements are arranged at equal intervals.
FIG. 5B shows the uniformity of illumination according to the simulation result of FIG. 5A.
FIG. 5C shows the illuminance simulation result of the light emitting module according to the embodiment.
FIG. 5D shows the uniformity of illumination according to the simulation result of FIG. 5C.
FIG. 6A shows the size of the illuminance measuring device for illuminance measurement simulation of the light emitting module shown in FIG.
FIG. 6B shows a distance between the illuminance measuring device and the light emitting module for illuminance measurement simulation of the light emitting module shown in FIG.
FIG. 6C shows the reflectance of the substrate for illuminance measurement simulation of the light emitting module shown in FIG.
7A shows a simulation result of illuminance of the light emitting module when both the first light emitting device and the second light emitting device are turned on according to the change of the separation distance in FIGS. 6A to 6C.
FIG. 7B shows a simulation result of illuminance of the light emitting module when only the second light emitting device is turned on according to the change of the separation distance in FIGS. 6A to 6C.
FIG. 7C shows a simulation result of the illuminance of the light emitting module when only the first light emitting device is turned on according to the change of the separation distance of FIGS. 6A to 6C.
Fig. 8 is an exploded perspective view of the cooling section and the support frame shown in Fig. 2;
9 is an exploded perspective view of the cooling section shown in Fig.
Figure 10 shows a perspective view of the cooling blocks shown in Figure 9;
11 shows a bottom perspective view of the cooling blocks shown in Fig.
12 is a schematic diagram of a fluid regulator for supplying fluid to the cooling blocks shown in Fig.
13 is a schematic view showing the arrangement of the inlet and the outlet of the cooling blocks shown in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

In describing an embodiment, when it is described as being formed "on or under" of each element, an upper or lower (on or under) Wherein both elements are in direct contact with each other or one or more other elements are indirectly formed between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

Also, the terms "first" and "second", "upper / upper / upper" and "lower / lower / lower" used in the following description are intended to mean any physical or logical relationship or order May be used solely to distinguish one entity or element from another entity or element, without necessarily requiring or implying that such entity or element is a separate entity or element. The same reference numerals denote the same elements throughout the description of the drawings.

It is also to be understood that the terms "comprises", "comprising", or "having" as used herein are meant to imply that a component can be implied unless specifically stated to the contrary, But should be construed to include other elements.

Fig. 1 shows a perspective view of an ultraviolet curing apparatus 100 according to an embodiment. Fig. 2 shows a cooling unit 120, a light emitting module 130, and a stage 130 shown in Fig.

1 to 3, the ultraviolet curing apparatus 100 includes a case 110, a cooling unit 120, a light transmitting plate 125, a support frame 127, a light emitting module 130, a stage 140 ), And a control unit 150. [

The ultraviolet curing apparatus 100 includes a storage unit 115 in which wiring lines for electrically connecting the controller 150 and the light emitting module 130 and cooling water supply tubes 160 for supplying cooling water to the cooling unit 120 are disposed, ).

The case 110 provides a space for accommodating the cooling section 120, the light transmitting plate 125, and the light emitting module 130 and the stage 140.

For example, the case 110 may be a vacuum chamber. The case 110 may also block ultraviolet light emitted from the light emitting module from escaping to the outside.

The translucent plate 125 is disposed inside the case 110, and the upper surface and the lower surface may be disposed so as to be parallel to the upper surface of the stage.

The light transmitting plate 125 supports the cooling unit 120 and the light emitting module 130 and transmits light emitted from the light emitting module 130.

For example, the translucent plate 125 may be made of translucent glass or quartz, but is not limited thereto.

For example, the translucent plate 125 may have a UV transmittance of 90% to 99%, but is not limited thereto.

The cooling unit 120 absorbs heat generated from the light emitting module 130 to lower the temperature of the light emitting module 130. The support frame 127 supports the cooling part 120 and the light emitting module 130 and is disposed on the light transmitting plate 125. The cooling unit 120 will be described later.

The light emitting module 130 emits light, for example ultraviolet light, toward the stage 140.

The stage 140 may be disposed apart from the light emitting module 130 under the light transmissive plate 125 with the area where the object to be cured is placed or placed.

3 is a plan view of the light emitting module 130 shown in FIG.

Referring to FIG. 3, the light emitting module 130 includes a substrate 131 and a plurality of light emitting devices 132 disposed on the substrate 131.

Each of the plurality of light emitting devices 132 may be a light emitting diode (LED).

For example, the plurality of light emitting devices 132 may include first light emitting devices 132a that emit light in a first wavelength range, and second light emitting devices 132b that emit light in a second wavelength range . For example, the first light emitting devices 132a and the second light emitting devices 132b may emit ultraviolet rays of different wavelengths.

For example, the wavelength of the light emitted by each of the first light emitting devices 132a may be included in a wavelength range of 315 nm or more and less than 375 nm.

Also, the wavelength of the light emitted by each of the second light emitting devices 132b may be included in a wavelength range of 375 nm or more and 420 nm or less.

For example, each of the first light emitting devices 132a may emit light having a wavelength of 365 nm, and each of the second light emitting devices 132b may emit light having a wavelength of 385 nm.

For example, the wavelengths of light emitted by the first light emitting devices 132a may be equal to each other, and the wavelengths of light emitted by the second light emitting devices 132b may be equal to each other.

Since the wavelength of the light emitted by the first light emitting devices 132a is different from the wavelength of the light emitted by the second light emitting devices 132b, the light emitting module 130 can realize a complex wavelength.

For example, each of the first and second light emitting devices 132a and 132b may be implemented as an LED chip or an LED package that emits ultraviolet rays, but is not limited thereto.

The first light emitting devices 132a and the second light emitting devices 132b may be independently driven independently of each other. For example, the first light emitting elements 132a may be turned on and the second light emitting elements 132b may be turned off at the same time. Alternatively, for example, the first light emitting elements 132a may be turned off while the second light emitting elements 132b may be turned on at the same time. Or the first and second light emitting elements 132a and 132b may be turned on at the same time.

The substrate 131 may be a printed circuit board (PCB) or a metal PCB, but is not limited thereto.

As shown in FIG. 3, the substrate 131 may have a polygonal shape, for example, a rectangular shape. For example, one side of the substrate 131 may include a plurality of sides 301 to 304, and may include vertices located between adjacent two sides. Here, one surface of the substrate 131 may be a surface on which the light emitting devices 132a and 132b are disposed.

The substrate 131 may include a plurality of layout regions P1 to P16 for arranging the light emitting elements 132a and 132b.

For example, the plurality of layout areas P1 to P16 may be arranged in a matrix form of rows and columns, but is not limited thereto.

The substrate 131 in FIG. 3 illustrates that it includes arrangement regions divided into 16, but is not limited thereto.

The arrangement regions P1 to P16 of the substrate 131 may correspond to a plurality of cooling blocks S1 to S16 of the cooling unit 120 to be described later.

The plurality of first light emitting devices 132a and the plurality of second light emitting devices 132b may be disposed in the plurality of arrangement regions P1 to P16 of the substrate 131. [

Each of the plurality of arrangement areas P1 to P16 may be the same shape, for example, a square, but is not limited thereto.

Each of the plurality of layout areas P1 to P16 may have the same size, for example, the same area, but is not limited thereto.

For example, the horizontal lengths of the plurality of arrangement areas P1 to P16 may be equal to each other, and the vertical lengths of the plurality of arrangement areas P1 to P16 may be equal to each other.

For example, contiguous placement regions among the plurality of placement regions P1 to P16 may contact with each other, but the present invention is not limited thereto. In another embodiment, the plurality of placement regions may fall at regular intervals.

The plurality of layout areas P1 to P16 may include first layout areas P1, P4, P13 and P16, second layout areas P2, P3, P5, P8, P9, P12, P14, And third placement areas P6, P7, P10, and P11.

The first arrangement areas P1, P4, P13, and P16 may include any one of the vertexes E1, E2, E3, or E4 of the substrate 131, or may be an area adjacent to any one vertex.

For example, each of the first placement areas P1, P4, P13, and P16 may include any one of the vertices E1, E2, E3, or E4 of the substrate 131, can do.

The second arrangement regions P2, P3, P5, P8, P9, P12, P14 and P15 are spaced from the vertexes E1 to E4 of the substrate 131, It may be a contact area.

The third arrangement regions P6, P7, P10, and P11 may be regions that are spaced apart from the vertexes E1 to E4 of the substrate 131 and the sides 301 to 304 of the substrate 131.

For example, the first layout regions P1, P4, P13, and P16 and the second layout regions P2, P3, P5, P8, and P8 are formed so as to surround the periphery of the third layout regions P6, P7, P9, P12, P14, P15) may be arranged.

The first light emitting devices 132a and the second light emitting devices 132b may be arranged in a first matrix form including rows and columns in each of the first arrangement regions P1, P4, P13, and P16.

The first light emitting devices 132a and the second light emitting devices 132a and 132b are arranged in a matrix form including rows and columns in each of the second arrangement regions P2, P3, P5, P8, P9, P12, P14, 132b may be arranged.

The first light emitting elements 132a and the second light emitting elements 132b may be arranged in a third matrix form including rows and columns in each of the third arrangement regions P6, P7, P10 and P11.

For example, the first light emitting device 132a and the second light emitting device 132b may be alternately arranged in the row and column directions of the first matrix, respectively, in the first arrangement regions P1, P4, P13, and P16 have.

The first light emitting device 132a and the second light emitting device 132b may be disposed in the second arrangement regions P2, P3, P5, P8, P9, P12, P14, (132b) may be alternately arranged.

Further, for example, the first light emitting device 132a and the second light emitting device 132b are alternately arranged in the row direction and the column direction of the third matrix, respectively, in the third arrangement regions P6, P7, P10, and P11 .

The row direction of each of the first to third matrices may be a direction in which the rows of each of the first to third matrices are arranged and the column direction of each of the first to third matrices may be the direction of the first to third matrices Lt; / RTI > are arranged.

For example, the row direction may be a direction from the first vertex E1 to the fourth vertex E4 of the vertexes E1 to E4 of the substrate 131, and the column direction may be a direction from the first vertex E1 to the fourth vertex E4 of the substrate 131 E1) to the second vertex E2, and the row direction and the column direction may be perpendicular to each other.

For example, the number of rows of each of the first through third matrices may be different, and the number of columns of each of the first through third matrices may be different, but is not limited thereto.

In another embodiment, the number of selected two rows among the first through third matrices may be equal to each other, and the number of selected two columns among the first through third matrices may be equal to each other.

The reason why the first light emitting device 132a and the second light emitting device 132b are alternately arranged in the row direction and the column direction of each of the first through third matrices is that the light of the light emitting module 100 having a complex wavelength In order to improve the uniformity of the film.

The arrangement of the first light emitting device and the second light emitting device in each of the first arrangement regions P1, P4, P13, and P16 is as follows.

The order of rows and columns of the first matrix composed of the first light emitting elements and the second light emitting elements disposed in the first arrangement regions P1, P4, P13, and P16 is defined as follows.

The row and column closest to the corresponding one of the vertexes of the substrate 131 are defined as the first row and the first column and the order of the column and the row is sequentially increased in the direction away from the corresponding vertex .

For example, the first row and the first column of the first arrangement region P1 may be rows and columns closest to the first vertex E1 and may be parallel to the row direction and away from the first vertex E1 , 101a, and the order of the rows may be increased in a direction parallel to the column direction and away from the first vertex E1 (e.g., 101b).

For example, the first row and the first column of the first arrangement region P4 may be rows and columns closest to the fourth vertex E4 and may be parallel to the row direction and away from the fourth vertex E4 For example, the order of the rows may increase to 104a and the order of the rows may increase in a direction parallel to the column direction and away from the fourth vertex E4 (e.g., 104b).

As described above, the first row and the first column can be defined for each of the first arrangement regions P13 and P16, and parallel to the row direction and at each of the second and third vertexes E2 and E3 The order of the rows may be increased in the distancing direction (e.g., 102a, 103a) and the order of the columns may be increased in the direction parallel to the column direction and away from the second and third vertexes E2, E3 (e.g., 102b) .

Fig. 4 shows the arrangement of the first light emitting element 132a and the second light emitting element 132b in one region of the first arrangement region P1 shown in Fig.

Referring to FIG. 4, first layout regions P1, P4, P13, and P16 are formed in order to improve the uniformity of light intensity generated from the first and second light emitting devices 132a and 132b having a complex wavelength. The distances between the adjacent two first light emitting devices 132a and the second light emitting devices 132b included in each column of the first matrix are as follows.

In the arrangement of the first and second light emitting elements 132a and 132b according to the first matrix of the first arrangement regions P1, P4, P13 and P16, the first and second rows of the first matrix The one separation distance d11 may be shorter than the second separation distance d12 between the second row and the third row (d11 < d12).

The third spacing distance d13 between the third row and the fourth row of the first matrix and the fourth spacing distance d14 between the fourth row and the fifth row of the first matrix are different from each other, (D12 = d13 = d14).

Also, the fourth separation distance d14 may be shorter than the fifth separation distance d15 between the fifth and sixth rows of the first matrix (d14 < d15).

Each of the distances (e.g., d16, d17, ...) between adjacent two rows selected from the sixth row to the last row of the first matrix may be equal to the fifth spacing distance d15 (d15 = d16 = d17 = ...). ).

In order to improve illumination uniformity of light generated from the first and second light emitting devices 132a and 132b having a complex wavelength, the angle of the first matrix of the first arrangement regions P1, P4, P13, and P16 The distance between the two adjacent first light emitting devices 132a and the second light emitting devices 132b included in the row is as follows.

The sixth spacing distance d21 between the first and second columns of the first matrix may be shorter than the seventh spacing distance d22 between the second and third columns (d21 < d22).

The seventh spacing distance d22 may be equal to the eighth spacing distance d23 between the third and fourth columns of the first matrix (d22 = d23).

The eighth spacing distance d23 may be shorter than the ninth separation distance d24 between the fourth and fifth columns of the first matrix (d23 < d24).

Each of the distances (e.g., d25, d26, d27, ...) between adjacent two columns selected from the fifth column to the last column of the first matrix may be equal to the ninth separation distance d24 (d24 = d25 = d26 = d27 = ...).

The sixth spacing distance d21 between the first row and the second row of the first matrix may be smaller than the first spacing distance d11 between the first row and the second row (d21 < d11).

Also, for example, the seventh spacing distance d22 between the second row and the third row of the first matrix may be smaller than the second spacing distance d12 between the second row and the third row (d22 < d12).

For example, d11: d12: d13: d14: d15: d16 = x1: x2: x3: x4: x5: x6, x1 may be 0.55 or more and less than 0.7, x2, x3, x4 may be 0.7 or more and less than 1 , x5 and x6 may be one. x2, x3, and x4 may be equal to each other, but are not limited thereto, and may be different from each other in other embodiments.

Y1: y2: y3: y4: y5, y1 may be 0.5 or more and less than 0.65, y2 and y3 may be 0.65 or more and less than 1, and y4 and y5 Lt; / RTI &gt; y2, and y3 may be equal to each other, but are not limited thereto, and may be different from each other in other embodiments.

For example, d11: d12: d15 = 0.58: 0.76: 1, and d21: d22: d24 = 0.55: 0.67: 1.

For example, the ratio of d11, d12, and d15 to the total length of either side of the first placement area P1, P4, P13, P16 parallel to the row of the first matrix may be 3.18%, 3.85%, and 5.77% .

For example, the ratio of d21, d22, and d24 to the total length of any one of the first arrangement regions P1, P4, P13, and P16 parallel to the rows of the first matrix may be 3.81%, 5.02%, and 6.58% have. The percentage of d11, d12, d15, d21, d22, and d24 may be a value rounded to the third decimal place.

The ratio of the distances of the first non-uniform interval sections of the first arrangement regions P1, P4, P13, and P16 in the direction parallel to the columns of the first matrix is equal to the ratio of the distances of the first arrangement regions P1, P13, P16) of 16% to 17% of the total length of one side. For example, the first boiling interval may be a period that includes spacings less than d15.

The ratio of the distance of the second unequal interval section of the first arrangement region in the direction parallel to the row of the first matrix is equal to the ratio of the distance of the first arrangement region (P1, P4, P13, P16) parallel to the row of the first matrix Can be from 12% to 13% of the total length. For example, the second boiling interval interval may be a period that includes spacing distances less than d24.

The rows of the first matrix of the first arrangement areas P1, P4, P13 and P16 are divided into a first group G11, a first group G12, and a first group G13 And the columns of the first matrix of the first arrangement regions P1, P4, P13 and P16 correspond to the second-first group G21, the second-second group G22 and the second-third group G23, .

For example, the first group G11 may include a first row of the first matrix, the first group G12 may include a second row through a fifth row of the first matrix, The first to third group G13 may include the sixth to last rows of the first matrix.

Also, for example, the second-first group G21 may comprise the first column of the first matrix and the second-second group G22 may comprise the second column through the third column of the first matrix , And the second to third group G23 may include a fourth column to a last column of the first matrix.

The distance between the adjacent two first groups selected from the first groups (for example, G11, G12, G13, ...) may be shorter toward the apex of the substrate 131 corresponding to the first placement region.

For example, the spacing distance between two adjacent first groups may be a spacing distance in a direction parallel to the row direction.

For example, the first distance d11 between the first group G11 and the first group G12 is greater than the fifth gap distance d11 between the first group G12 and the first group G13, (d15).

Also, the first distance d11 may be shorter than the distance d12, d13, and d14 between two adjacent rows included in the first-second group G12.

Also, for example, the separation distances d12, d13, and d14 between two adjacent rows included in the first-second group G12 may be shorter than the fifth separation distance d15.

Also, for example, the fifth separation distance d5 may be equal to the separation distance between two adjacent rows included in the first-third group G13.

The distance between the adjacent two second groups selected from the second groups (for example, G21, G22, G23, etc.) may be shorter toward the apex of the substrate corresponding to the first placement area. For example, the distance between two adjacent second groups may be a distance in a direction parallel to the column direction.

For example, the sixth separation distance d21 between the second-first group G21 and the second-second group G22 is the seventh separation distance d21 between the second-second group G22 and the second- (d24).

Also, the sixth separation distance d21 may be shorter than the separation distances d22 and d23 between two adjacent columns included in the second-second group G22.

Also, for example, the separation distances d25, d26, and d27 between two adjacent columns included in the second and third groups G23 may be equal to the ninth separation distance d24.

The arrangement of the first light emitting device and the second light emitting device in each of the second arrangement regions P2, P3, P5, P8, P9, P12, P14, and P15 is as follows.

The spacing between adjacent two rows of the second matrix of each of the second placement regions P2, P3, P14, P15 in the first direction may be equal to each other.

Further, the distances between adjacent two columns of the second matrix of each of the second arrangement regions P5, P8, P9 and P12 in the first direction may be equal to each other.

The first direction may be a direction parallel to either side of the substrate 131 adjacent to each of the second arrangement regions P2, P3, P5, P8, P9, P12, P14 and P15.

For example, the first direction for the second placement regions P2, P3 may be a direction parallel to the first side 301 of the substrate 131 adjacent to the second placement regions P2, P3.

The columns or rows of the second matrix of each of the second arrangement regions adjacent to either one of the sides 301 to 304 of the substrate 131 are arranged such that the first rows of the first arrangement region May be aligned or aligned in a first direction to the columns or rows of the matrix.

For example, the rows of the second matrix of each of the second arrangement regions P2, P3 adjacent to the first side 301 may be arranged in a first arrangement region 301 including the vertexes E1, E4 adjacent to the first side 301, May be aligned in a first direction on columns of the first matrix of columns P1, P4.

Also for example, the rows of the second matrix of each of the second arrangement regions P8, P12 adjacent to the second side 302 may be arranged in a first arrangement (not shown) including the vertices E3, E4 adjacent the second side 302 May be aligned in the first direction to the rows of the first matrix of regions P4 and P16.

Also for example, the array distance and the number of arrays of columns or rows of the second matrix parallel to the second direction may be equal to the array distance and array number of columns or rows of the first matrix parallel to the second direction. The second direction may be a direction perpendicular to the first direction.

For example, a separation distance between two adjacent rows or two rows of a second matrix, which is parallel to the second direction of each of the second arrangement regions adjacent to one side of the substrate 131, May be the same as the separation distance between the two adjacent columns of the second matrix and the corresponding two of the columns of the first matrix of the first arrangement region.

For example, the spacing distance between the first row and the second row of the second matrix of each of the second placement regions P2, P3 may be a sixth spacing distance between the first row and the second row of the first matrix of the first placement region P1 (d21).

The distance between the first row and the second row of the second matrix of each of the second arrangement regions P5 and P9 is set such that the first spacing between the first row and the second row of the first matrix of the first arrangement region P1 May be the same as the distance d11. The spacing distance between the remaining two adjacent columns or rows of the second deployment areas may be the same as the spacing distance between two adjacent columns or rows of the corresponding first deployment area as described above.

The distance between two adjacent rows or columns parallel to the second direction of the second matrix of the second arrangement region adjacent to either one of the sides of the substrate 131 can be made smaller toward either side.

In the third arrangement regions P6, P7, P10 and P11, the first light emitting element 132a and the second light emitting element 132b may be arranged at equal intervals in the direction parallel to the row direction, They can be arranged at equal intervals in one direction.

For example, the spacing between adjacent two rows selected from the rows of the third matrix may be equal to each other. Further, for example, the distances in the direction parallel to the column direction between two adjacent columns selected from the columns of the third matrix may be equal to each other.

The order of the rows of the third matrix of the second and third arrangement regions P6, P7, P10 and P11 of the second arrangement regions P2, P3, P5, P8, P9, P12, P14, It can be defined to increase from left to right and increase the order of columns from top to bottom.

The spacing distance between the rows of the first matrix of the first arrangement region adjacent to each other and the rows of the second matrix of the second arrangement region may be the same as the spacing distance between the adjacent two rows of the second matrix of the second arrangement region.

For example, the distance between the last row of the first matrix of the first placement area P1 and the first row of the second matrix of the second placement area P2, which are adjacent to each other, May be equal to the separation distance between two adjacent rows.

The spacing distance between the rows of the first matrix of the first arrangement region adjacent to each other and the rows of the second matrix of the second arrangement region may be the same as the spacing distance between the adjacent two columns of the second matrix of the second arrangement region.

For example, the distance between the last row of the first matrix of the first placement area P1 and the first row of the second matrix of the second placement area P5 is the distance between the adjacent two of the second matrix of the second placement area P5 May be equal to the separation distance between the columns.

The spacing distance between any one row of adjacent two second arrangement regions and any other adjacent row may be the same as the spacing distance between two adjacent rows of each of the second placement regions.

For example, the distance between the last row of the second placement area P2 and the first row of the second placement area P3 is equal to the distance between two adjacent rows of the second placement areas P2, P3 .

A separation distance between any one of the two adjacent arrangement regions and any other adjacent column may be the same as a separation distance between adjacent two columns of each of the second placement regions.

For example, the distance between the last row of the second placement area P5 and the first row of the second placement area P9 may be the same as the distance between two adjacent rows of the second placement areas P5 and P9 have.

The spacing distance between the row of the second matrix of the second arrangement region and the row of the third matrix of the third arrangement region adjacent thereto may be the same as the spacing distance between the adjacent two rows of the third matrix of the third arrangement region.

For example, the spacing distance between the last row of the second matrix of the second placement area P5 and the first row of the third placement area P6 is equal to the spacing distance between two adjacent rows of the third placement area P6 .

The spacing between the rows of the second matrix of the second arrangement region and the rows of the third matrix of the third arrangement region adjacent thereto may be the same as the spacing distance between the adjacent two columns of the third matrix of the third arrangement region.

For example, the distance between the last row of the second matrix of the second placement area P2 and the first row of the third placement area P6 may be the same as the distance between the adjacent two rows of the third placement area P6 have.

The distance between any one of the two adjacent third arrangement regions and another adjacent column may be the same as the distance between adjacent two columns of each of the third arrangement regions.

The spacing distance between any one of the two adjacent third layout areas and any other adjacent row may be the same as the spacing distance between adjacent two rows of each of the third layout areas.

3, the substrate 131 is divided into the first to third arrangement regions, but the present invention is not limited thereto.

In other embodiments, the second and third placement regions are omitted, and the substrate 131 may have a first placement region.

In another embodiment, the second placement area is omitted, and the substrate 131 may have first and third placement areas.

In yet another embodiment, the third placement area is omitted, and the substrate 131 may have first and second placement areas.

The first and second light emitting devices 132a and 132b are densely arranged in a region adjacent to the vertexes and sides of the substrate 131 and the substrate 131 is arranged in the light emitting module 130 according to the embodiment, By arranging the first and second light emitting elements 132a and 132b at equal distances from the vertexes and the sides of the light emitting elements 132a and 132b, the uniformity of the illuminance in the cured region in which the object to be cured is disposed can be improved.

Further, as compared with the case where the first and second light emitting elements are arranged at equal intervals on the substrate without distinguishing between the first to third arrangement regions, the embodiment is required to satisfy the target uniformity for the same size of the curing region The number of light emitting elements can be reduced, thereby reducing the area of the light emitting module.

5A shows the illuminance simulation result of the light emitting module in which the light emitting elements are arranged at equal intervals, FIG. 5B shows the uniformity of the illuminance according to the simulation result of FIG. 5A, FIG. 5C shows the illuminance simulation result And FIG. 5D shows the uniformity of illumination according to the simulation result of FIG. 5C.

5A and 5C, the areas of the curing areas are equal to each other, the distance from the light emitting module to the curing area is equal to 100 mm, the area of the target area of the stage 140 for the curing area is 1300 mm x 1100 mm .

In FIG. 5C, the arrangement of the first light emitting device and the second light emitting device may be arranged according to the ratio as described in FIG.

For example, d11: d12: d13: d14: d15: d16 = 0.58: 0.76: 0.76: 0.76: 1:

For example, d21: d22: d23: d24: d25 = 0.55: 0.67: 0.67: 1:

In FIG. 5A, the first light emitting device and the second light emitting device may be arranged in the form of a 68 × 80 matrix, and the area of the LED array area may be 1500 mm × 1307 mm. Here, the area of the light emitting element array region may be an area of one region of the substrate 131 on which the first and second light emitting elements 132a and 132b are disposed.

In Fig. 5A, the width of the light emitting element array region is larger than the longitudinal length, but is not limited thereto.

In another embodiment, the light emitting element array region may have the same lateral length and the same longitudinal length. In this case, the first and second adjacent regions P1, P4, P13, and P16, The ratio of the arrangement of the light emitting elements may be the same as the ratio of the arrangement of the first and second light emitting elements adjacent in the column direction.

In another embodiment in which the width and the length of the light emitting element array region are equal to each other, the description of the ratio of d11 to d16 can be applied equally to both the row direction and the column direction. For example, the arrangement of the first and second light emitting devices in the row direction and the column direction may satisfy a ratio of d11: d12: d13: d14: d15: d16 = x1: x2: x3: x4: x5: x6, 0.55 or more and less than 0.7, x2, x3, x4 may be 0.7 or more and less than 1, and x5 and x6 may be 1. x2, x3, and x4 may be equal to each other, but are not limited thereto, and may be different from each other in other embodiments.

For example, when the lateral length and the longitudinal length of the light emitting element array region are equal to each other, the arrangement of the first and second light emitting elements in the row direction and column direction of the first arrangement regions P1, P4, P13, : d13: d14: d15: d16 = 0.58: 0.76: 0.76: 0.76: 1: 1 can be satisfied.

In another embodiment, the description of the ratio of d21 to d25 can be applied equally to both the row direction and the column direction.

For example, in another embodiment where the lateral length and the longitudinal length of the light emitting element array region are equal to each other, the arrangement of the first and second light emitting elements in the row direction and the column direction is d21: d22: d23: d24: d25 = y3: y4: y5.

y1 may be 0.5 or more and less than 0.65, y2 and y3 may be 0.65 or more and less than 1, and y4 and y5 may be 1. y2, and y3 may be equal to each other, but are not limited thereto, and may be different from each other in other embodiments.

For example, when the lateral length and the longitudinal length of the light emitting element array region are equal to each other, the arrangement of the first and second light emitting elements in the row direction and column direction of the first arrangement regions P1, P4, P13 and P16 is d21: d22 : d23: d24: d25 = 0.55: 0.67: 0.67: A ratio of 1: 1 can be satisfied.

On the other hand, in FIG. 5C, the first light emitting device and the second light emitting device may be arranged in a matrix of 62 × 74, and the area of the LED array area may be 1344 mm × 1146 mm.

Max denotes the maximum value of the illuminance, Min denotes the minimum value of the illuminance, Avg denotes the average value of the illuminance, and UNI denotes 1 - {(Max-Min) / (2Avg)}.

Referring to FIGS. 5C and 5D, the illuminance uniformity can be improved in the case of FIG. 5C as compared with the case of FIG. 5A. Therefore, the uniformity of the embodiment can be improved as compared with the case of FIG. 5A. In the embodiment, the number of the light emitting elements of the light emitting module for satisfying the uniformity improvement can be reduced by 16% and the area of the light emitting element array can be reduced by about 20% as compared with FIG. 5A.

The ratio (S1: S2) of the area S1 of the target area to the area S2 of the light emitting element array area according to the embodiment may be 1: 1.08 to 1: 1.37.

The area of the light emitting element array region can be freely set according to the above-mentioned area ratio even if the area of the target region is changed. Thus, in the embodiment, the area of the light emitting element array can be reduced and the uniformity of illumination can be ensured.

FIG. 6A shows the size of the illuminance measuring device 210 for simulating illuminance measurement of the light emitting module 130 shown in FIG. 4, and FIG. 6B is a diagram illustrating the illuminance measuring device 210 for illuminance measurement simulation of the light emitting module 130 shown in FIG. FIG. 6C shows the reflectance of the substrate for illuminance measurement simulation of the light emitting module 130 shown in FIG. 4. FIG.

4, the power of the first light emitting device 132a is 1.90 W, the power of the second light emitting device 132b is 2.19 W, d11 is 11 mm, and d12, d13, and d14 are 14.50 mm D15 is 19 mm, d21 is 10.75 mm, d22 and d23 are 13 mm, and d24 is 19.50 mm.

6A, the lateral length of the light emitting device array including the first and second light emitting elements disposed on the substrate 131 of the light emitting module 130 may be 1355.75 mm, the vertical length may be 1155.50, The transverse length of the first electrode 210 may be 1300 mm, and the length of the second electrode 210 may be 1100 mm.

6B, the distance H between the first and second light emitting devices 132a and 132b of the light emitting module 130 and the sensing unit of the illuminance meter 210 is changed from 50 mm to 100 mm by 10 mm, .

Referring to FIG. 6C, the reflectance of one surface of the substrate 131 on which the first and second light emitting devices 132a and 132b are disposed may be 70%. The substrate 131 may include a reflective sidewall 220 protruding from one surface of the substrate 131 to surround the first and second light emitting devices 132a and 132b. The reflectance may be 70%.

FIGS. 7A to 7C show illumination simulation results of the first and second light emitting devices according to FIGS. 6A to 6C. FIG. In FIG. 7A, the target average value of the illuminance of the light emitting module according to the embodiment may be 500 [mW / cm 2], and the uniformity of the target illuminance (UNI) may be 80% or 90%.

FIG. 7A shows a simulation result of illuminance of a light emitting module in a case where both the first light emitting device and the second light emitting device are turned on according to the change of the separation distance H in FIGS. 6A to 6C.

FIG. 7B shows a simulation result of illuminance of the light emitting module when only the second light emitting device is turned on according to the change of the separation distance H in FIGS. 6A to 6C.

FIG. 7C shows a simulation result of the illuminance of the light emitting module when only the first light emitting device is turned on according to the change of the separation distance H in FIGS. 6A to 6C.

7A, 7B and 7C, it can be seen that the uniformity (UNI) of the illuminance satisfies 80% or more when the separation distance H is 50 mm to 100 mm.

7A, 7B, and 7C, it can be seen that uniformity (UNI) of 90% or more is satisfied when the separation distance H is 50 mm to 70 mm.

7A, 7B and 7C, it can be seen that the uniformity (UNI) of the illuminance satisfies 95% or more when the separation distance H is 50 mm.

7A, 7B and 7C, it can be seen that the uniformity of the illuminance (Avg / Max) satisfies 95% or more when the separation distance H is 50 mm to 100.

7A, it is understood that the average value (Avg) of the illuminance of the light emitting module 130 according to the embodiment is 500 [mW / cm2] or more.

FIG. 8 is an exploded perspective view of the cooling unit 120 and the support frame 127 shown in FIG. 2. FIG. 9 is an exploded perspective view of the cooling unit 120 shown in FIG. 8, and FIG. Fig. 11 is a bottom perspective view of the cooling blocks S1 to S16 shown in Fig. 10. Fig. 11 is a perspective view of the cooling blocks S1 to S16 shown in Fig.

8 to 11, the support frame 127 is connected to the frame part 127a and the frame part 127a for supporting the cooling part 120, and the frame part 127a is formed on the light- And at least one support portion 127b for seating the support portion 127b.

For example, the support frame 127 may have the same shape as the outer peripheral surface of the cooling part 120, for example, a square.

The number of the support portions 127b may be plural, and the plurality of support portions may be disposed apart from each other. For example, the supports may be in the form of legs, but are not limited thereto.

The cooling unit 120 includes a heat sink 305, a plurality of cooling blocks S1 to S16 disposed on the heat sink 305, a plurality of cooling blocks S1 to S16, And a plurality of cover members 121a to 121d which are combined with the heat sink 305 and cover the cooling blocks S1 to S16 and the fluid regulating portion 330 .

Each of the plurality of cooling blocks S1 to S16 may correspond to any one of a plurality of arrangement regions P1 to P16 of the substrate 131. [

The heat sink 305 may include a bottom 305a and a plurality of side plates 305-1 through 305-8 disposed on the sides of the bottom 305a.

On the bottom 305a of the heat sink 305, cooling blocks S1 to S16 may be disposed.

11, the bottom 305a of the heat sink 305 may be divided into a plurality of cooling blocks corresponding to the cooling blocks S1 to S16.

For example, the heat sink 305 may include the bottoms 305a1 corresponding to the cooling blocks S1 to S16, and the bottom 305a1 of the heat sink 305 may include the cooling blocks S1 to S16 And may be the bottom of any corresponding body 510.

The first and second light emitting devices 132a and 132b may be disposed on the first surface of the substrate 131 of the light emitting module 130 and the second surface of the substrate 131 may be disposed on the bottom surface of the heat sink 305. [ The substrate 131 may be disposed below the bottom 305a1 of the heat sink 305 so as to be in contact with the heat sink 305a1. The first surface and the second surface of the substrate 131 may be facing each other.

The substrate 131 may be divided into a plurality of layout regions P1 to P16 and a plurality of layout regions P1 to P16 may be separated or divided from each other.

Each of the plurality of arrangement areas P1 to P16 may correspond to any one of the bottoms of the heat sink 305. [ For example, the second surface of each of the plurality of placement areas Pl through P16 may be in contact with a corresponding one of the bottoms of the heat sink 305. [

Referring to Fig. 10, each of the plurality of cooling blocks S1 to S16 includes a main body 510, an inlet Q _IN , and an outlet Q _OUT .

The inlet port Q _IN is disposed in one area of the main body 510 and may be a passage for introducing or introducing fluid into the main body 510. The outlet Q _OUT may be disposed in another area of the main body 510 and spaced apart from the inlet Q _IN and may be a passage for discharging fluid from the inside of the main body 510.

The main body 510 provides a flow path for the fluid flowing through the inlet port Q _IN and the fluid flowing inside the main body 510 can be discharged out of the main body 510 through the outlet port Q _OUT .

12 is a schematic diagram of a fluid regulator 330 for supplying fluid to the cooling blocks S4, S8, S12, and S16 shown in FIG.

10 to 12, the fluid regulating unit 330 includes a fluid supply pipe 321 through which fluid is supplied from the outside, a first connection pipe 331 connecting the fluid supply pipe 321 and the inlet Q _IN , A fluid outlet pipe 322 for discharging the fluid and a second connecting pipe 332 for connecting the fluid outlet pipe 322 and the outlet port Q _OUT to each other, a flow sensor 341 mounted on the first connecting pipe 331, .

The fluid regulator 330 may further include a first valve 351 and a second valve 352.

The first valve 351 is mounted on the first connection pipe 331 and is located between the flow sensor 341 and the fluid supply pipe 321 and flows into the inlet port Q _IN via the first connection pipe 331 The flow rate can be adjusted.

The second valve 352 is mounted on the second connection pipe 332 and can control the flow rate of the fluid discharged through the second connection pipe 332 to the fluid discharge pipe 322.

The cooling blocks S1 to S16 corresponding to the layout areas P1 to P16 may be arranged in a matrix form of rows and columns, but are not limited thereto.

For example, the fluid regulator 330 may include a plurality of fluid supply tubes and fluid discharge tubes, and a pair of fluid supply tubes 321 and fluid discharge tubes 322 may be disposed corresponding to the cooling blocks included in each row .

10 shows only the fluid regulator for the cooling blocks S4, S8, S12 and S16 included in the last row, but the fluid regulator for the cooling blocks included in each row also applies the same contents as in FIG. 10 .

For example, the pair of fluid supply pipes 321 and the fluid discharge pipe 322 are shared by the cooling blocks included in each row, but the first connection pipe 331, the second connection pipe 332, 1 and the second valves 351 and 352, and the flow rate sensor 341 may be separately provided. This independent and individual configuration allows the components such as the first connection pipe 331, the second connection pipe 332, the first and second valves 351 and 352 and the flow sensor 341 to be damaged or damaged When a problem arises due to a problem, only the parts in question can be replaced individually.

13 is a schematic diagram showing the arrangement of the inlet Q _IN and the outlet Q _OUT of the cooling blocks S1 through S16 shown in FIG.

13, the cooling blocks S1 to S16 are connected to the first cooling blocks S1, S4, S13, and S16 corresponding to the first layout areas P1, P4, P13, and P16 of the substrate 131, The second cooling blocks S2, S3, S5, S8, S9, S12, S14, and S15 corresponding to the second placement areas P2, P3, P5, P8, P9, P12, P14, Third cooling blocks S6, S7, S10, and S11 corresponding to the third deployment areas P6, P7, P10, and P11.

Each of the first cooling blocks S1, S4, S13, and S16 may include vertices E11 to E14 corresponding to any one of the vertices of the first deployment areas P1, P4, P13, and P16 .

The inlet Q _IN of each of the first cooling blocks S1, S4, S13 and S16 may be disposed closer to a corresponding one of the vertexes E11 to E14 than the outlet Q _OUT .

For example, the inlet Q _IN and the outlet Q _{OUT of} each of the first cooling blocks S1, S4, S13, and S16 may be arranged in the row direction of the cooling blocks S1 to S16, _IN may be disposed closer to the corresponding vertex than the outlet Q _OUT .

In FIG. 13, the inlet Q _IN and the outlet Q _{OUT of} each of the first cooling blocks S1, S4, S13, and S16 are arranged in the row direction, but are not limited thereto. In another embodiment, the inlet (Q _IN ) and outlet (Q _OUT ) of each of the first cooling blocks (S1, S4, S13, S16) may be arranged in the column direction of the cooling blocks (S1 to S16).

In yet another embodiment, the inlet (Q _IN ) and outlet (Q _OUT ) of each of the first cooling blocks (S1, S4, S13, S16) may be arranged diagonally. Here, the diagonal direction may be a direction parallel to a straight line connecting each of the vertexes E11 to E14 of the first cooling blocks S1, S4, S13, and S16 and another facing vertex.

The temperature of the cooling water flowing into the inlet port Q _IN is lower than the temperature of the cooling water flowing out through the outlet port Q _OUT . This is because the cooling water flowing through the main body 510 absorbs heat generated from the first and second light emitting elements 132a and 132b.

For each of the first arrangement regions P1, P4, P13 and P16, the arrangement density of the first and second light emitting elements in the region adjacent to the vertexes E1 to E4 is different from the arrangement density of the first and second Is higher than the arrangement density of the light emitting elements, a relatively large amount of heat can be generated.

A temperature gradient due to the heat generated by the first and second light emitting elements may be generated with respect to the first layout regions P1, P4, P13, and P16, and the uniformity of the illuminance may be deteriorated. This is because the illuminance values of the first and second light emitting devices 132a and 132b may vary depending on the temperature and may be different from each other in the first arrangement regions P1, Because the arrangement density of the first and second light emitting elements is high.

The embodiment is characterized in that the position of the inlet Q _IN is arranged close to the vertexes E 1 to E 4 of the first arrangement areas P 1, P 4, P 13 and P 16, P1 to P16), thereby preventing the lowering of the uniformity of the roughness that may be caused by the temperature gradient. This is because the temperature of the cooling water flowing inside the body 510 adjacent to the inlet Q _IN is lower than the temperature of the cooling water flowing inside the body adjacent to the outlet Q _OUT .

That is, in the embodiment, the temperature of the first and second light emitting elements of the light emitting module that generates the planar light source by the cooling unit 120 is kept constant, thereby preventing deterioration in optical characteristics and lifetime of each object of the object to be cured.

S3, S5, S8, S9, S12, S14, and S15 in order to lower the temperature gradient in the second arrangement regions P2, P3, P5, P8, P9, P12, P14, P15. S15) sides of the inlet (Q _iN), an outlet (the second cooling block corresponding to the sides of the substrate 131 than the Q _OUT) (S2, S3, S5, S8, S9, S12, S14, S15) in each As shown in FIG.

For example, the inlet Q _IN and the outlet Q _{OUT of} each of the second cooling blocks S2, S3, S5, S8, S9, S12, S14, and S15 are arranged in the row direction of the cooling blocks S1- And may be arranged to be parallel to the column direction.

The inlet Q _IN and the outlet Q _{OUT of} each of the third cooling blocks S6, S7, S10 and S11 may be arranged in a direction parallel to the row direction or the column direction of the cooling blocks S1 to S16 have.

The control unit 150 provides driving signals or power for driving the first light emitting devices 132a and the second light emitting devices 132b of the light emitting module 130. [

For example, the control unit 150 may individually drive the first and second light emitting devices 132a and 132b disposed in the placement regions P1 to P16 for each placement region.

The control unit 150 supplies the cooling water to the cooling unit 120 or the cooling water from the cooling unit 120 through the cooling water pipe 160 connected to the fluid supply pipe 321 and the fluid discharge pipe 322 of the cooling unit 120 Can be controlled.

The ultraviolet curing apparatus 100 may further include wires or cables for electrically connecting the first and second light emitting devices 132a and 132b of the light emitting module 130 and the control unit 150. [

10 and 11, the ultraviolet curing apparatus 100 is disposed in the arrangement regions P1 to P16 of the substrate 131 through the main body 510 of each of the cooling blocks S1 to S16, And the terminals 520 may be electrically connected to the first and second light emitting devices 132a and 132b disposed in any one of the corresponding regions.

A wire (or cable) is connected to each of the terminals 520 and wires (or cables) connected to the terminals 520 may be electrically connected to the controller 150.

The controller 150 may provide driving signals or power to the first and second light emitting devices 132a and 132b disposed in the arrangement areas P1 to P16 of the substrate 131 through the wires.

The ultraviolet curing apparatus 100 may further include a display unit 170 for displaying a flow rate of the cooling water measured by the flow sensor 341 included in each of the cooling blocks S1 to S16.

As described above, in order to improve the uniformity of illumination, the embodiment optimizes the separation distance of the first and second light emitting elements 132a and 132b disposed in the placement regions P1 to P16 through simulation, This can improve the uniformity of the light irradiated over the entire area of the object to be cured.

In addition, the embodiment can also be applied to the cooling blocks S1 to S16 of the cooling unit 120, taking into consideration the arrangement of the first and second light emitting elements 132a and 132b in the above- (Q _IN ) and the outlet (Q _OUT ) are arranged as described in FIG. 13, the temperature gradient can be lowered to prevent lowering of the uniformity of the illuminance of the ultraviolet curing apparatus 100.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Further, the features, structures, effects, and the like illustrated in the embodiments can be combined and modified by other persons having ordinary skill in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

110: Case 120: Cooling section
125: translucent plate 130: light emitting module
140: Stage 150: Control section.

Claims (24)

A stage for placing the object to be cured; And
And a plurality of light emitting elements disposed on each of the plurality of arrangement regions,
Wherein the plurality of arrangement areas include:
And first placement regions adjacent to the vertices of the substrate and in which the light emitting elements are arranged in a first matrix form,
Wherein the first matrix is defined as a first row and a first row closest to a corresponding one of vertexes of the substrate and a row and a column in a direction away from the corresponding one of the vertices Is defined to increase,
Wherein the spacing distance between two adjacent light emitting elements disposed in each of the first arrangement regions decreases as the distance from one of the apexes of the substrate to adjacent ones of the apexes of the substrate. The apparatus according to claim 1,
Further comprising second placement regions spaced apart from the apexes of the substrate and in contact with sides of the substrate and in which the light emitting elements are arranged in a second matrix form. 3. The method of claim 2,
Wherein a distance between adjacent two rows of the first matrix is reduced as the distance between adjacent ones of the vertices of the substrate is closer to a corresponding one of the vertices of the substrate. The method of claim 3,
Wherein a distance between two adjacent columns of the first matrix is reduced as the distance between adjacent ones of the vertices of the substrate is closer to a corresponding one of the vertices of the substrate. The method of claim 3,
A first spacing distance between the first row and the second row of the first matrix is shorter than a second spacing distance between the second row and the third row,
The third spacing distance between the third row and the fourth row of the first matrix and the fourth spacing distance between the fourth row and the fifth row of the first matrix are equal to each other,
Wherein the fourth spacing distance is shorter than the fifth spacing distance between the fifth row and the sixth row of the first matrix. 6. The method of claim 5,
Wherein each of the spacing distances between two adjacent rows selected from the sixth row to the last row of the first matrix is equal to the fifth spacing distance. The method of claim 3,
A sixth spacing distance between the first and second columns of the first matrix is shorter than a seventh spacing distance between the second and third columns of the first matrix,
And the seventh spacing distance is equal to an eighth spacing distance between the third column and the fourth column of the first matrix.
Wherein the eighth spacing distance is shorter than a ninth separation distance between the fourth column and the fifth column of the first matrix,
Wherein each of the spacing distances between two adjacent columns selected from the fifth column to the last column of the first matrix is equal to the ninth spacing distance. The method of claim 3,
The spacing distance between adjacent two rows of the second matrix of each of the second arrangement regions in the first direction being equal to each other and the first direction being parallel to either side of the substrate adjacent each of the second arrangement regions An ultraviolet curing device in one direction. The method of claim 3,
The columns or rows of the second matrix of each of the second arrangement regions adjacent to either side of the sides of the substrate are arranged in rows or columns of the first matrix of the first arrangement region including vertices adjacent to either side Aligned in one direction,
Wherein the first direction is parallel to either side of the substrate adjacent to each of the second arrangement regions. The method of claim 3,
The array distance and array number of columns or rows of the second matrix parallel to the second direction is equal to the array distance and array number of columns or rows of the first matrix parallel to the second direction, Is a direction perpendicular to the first direction. 6. The method of claim 5,
The second spacing distance, the fourth spacing distance, and the fifth spacing distance with respect to the total length of any one side of the first arrangement region parallel to the row of the first matrix The ratio of the ultraviolet curing device is 3.18: 3.85: 3.85: 3.85: 5.77. 8. The method of claim 7,
The ratio of the sixth spacing distance, the seventh spacing distance, the eighth spacing distance, and the ninth spacing distance to the total length of any one side of the first arrangement region parallel to the row of the first matrix is 3.81 : 5.02: 5.02: 6.58. 6. The method of claim 5,
Wherein the ratio of the first spacing distance, the second spacing distance, the third spacing distance, the fourth spacing distance and the fifth spacing distance is x1: x2: x3: x4: x5 and x1 is 0.55 or more and less than 0.7 , X2, x3, and x3 are each 0.7 or more and less than 1, and x5 is 1. 8. The method of claim 7,
Y1: y2: y3: y4; y1: not less than 0.5 and not more than 0.65; and y2 and y3: not less than 0.65, wherein the ratio of the sixth spacing distance to the seventh spacing distance, Or more and less than 1, and y4 is 1. The method according to claim 1,
And a ratio of a layout area of light emitting elements disposed in the plurality of layout areas to an area of a target area for curing the stage is 1: 1.08 to 1: 1.37. A stage for placing the object to be cured; And
And a light emitting module disposed on the stage, the light emitting module including a substrate including a plurality of arrangement regions and light emitting elements alternately arranged in each of the plurality of arrangement regions,
Wherein the plurality of arrangement areas include:
First placement regions adjacent to the vertices of the substrate and in which the light emitting elements are arranged in a first matrix form;
Second placement regions spaced from the apexes of the substrate and in contact with the sides of the substrate and in which the light emitting elements are arranged in a second matrix form; And
And third arrangement regions spaced apart from the vertices of the substrate and sides of the substrate and in which the light emitting elements are arranged in a third matrix form,
Wherein the first matrix is defined by rows and columns closest to a corresponding one of the vertices of the substrate as a first row and a first column and sequentially arranged in a row and a direction away from the corresponding one of the vertices, The order of the columns is defined to increase,
Wherein the rows of the first matrix are divided into a first group including the first row, a first group including the second through fifth rows, and a third group including the sixth through the last rows Respectively,
The first separation distance between the group 1-1 and the group 1-2 is shorter than the separation distance between the group 1-2 and the group 1-3,
The first separation distance is shorter than the separation distance between two adjacent rows included in the first and second groups and the separation distance between two adjacent rows included in the first and second groups is shorter than the second separation distance, Curing device. 17. The method of claim 16,
And the second spacing distance is equal to a spacing distance between two adjacent rows included in the first group of 1-3. 17. The method of claim 16,
The columns of the first matrix are divided into a first group including a first column, a second group including a second column and a third column, a second group including a second column and a third column, Group,
The third separation distance between the second-first group and the second-second group is shorter than the fourth separation distance between the second-second group and the second-third group,
And the third spacing distance is shorter than a distance between adjacent two columns included in the second group. 19. The method of claim 18,
Wherein a distance between adjacent two columns included in the group 2-3 is equal to the fourth spacing distance. 17. The method of claim 16,
The spacing distances between two adjacent rows of the second matrix are equal to each other,
Wherein the first spacing distance and the second spacing distance are shorter than the spacing distance between two adjacent rows of the second matrix. 19. The method of claim 18,
The distances between adjacent two columns of the second matrix are equal to each other,
Wherein the third spacing distance and the spacing distance between two adjacent columns included in the second 2-2 group are shorter than the spacing distance between two adjacent columns of the second matrix. A stage for placing the object to be cured;
A substrate disposed on the stage and including first placement regions, second placement regions, and third placement regions, and a second substrate having a first and second placement regions, A light emitting module including light emitting elements alternately arranged in each of the light emitting modules; And
And a cooling unit disposed on the light emitting module,
Wherein each of the first arrangement regions is adjacent to a corresponding one of the first vertices of the substrate and the second arrangement regions are spaced from the first vertices of the substrate and abut the sides of the substrate, 3 arrangement regions are spaced from the first vertices and sides of the substrate,
Wherein the arrangement density of the light emitting elements disposed in each of the first arrangement areas increases as the arrangement density of the light emitting elements disposed in each of the second arrangement areas increases as the arrangement density of the light emitting elements disposed in each of the first arrangement areas becomes closer to the corresponding one of the first vertices, As shown in FIG.
The cooling unit includes:
First cooling blocks corresponding to the first deployment areas and having second vertices corresponding to the first vertices,
Wherein each of the first cooling blocks includes a first body and a first inlet for introducing fluid to the first body and a first outlet for discharging fluid from the first body,
Wherein the first inlet is disposed closer to the second vertex of each of the first cooling blocks than the first outlet. 23. The method of claim 22,
The cooling section further comprises second cooling blocks corresponding to the second deployment regions,
Each of the second cooling blocks includes a second body, a second inlet for introducing fluid into the second body, and a second outlet for discharging fluid from the second body,
The second inlet of the second cooling blocks being further adjacent to the sides of the second cooling blocks corresponding to the sides of the substrate than the second outlet. The method according to claim 1, 16, or 22,
Wherein the light emitting devices include a first light emitting device and a second light emitting device that are alternately disposed, and the first light emitting device and the second light emitting device emit ultraviolet rays of different wavelengths.

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