JP6187613B2 - Surface irradiation device - Google Patents

Description

  The present invention relates to a surface irradiation apparatus that irradiates an irradiated surface with ultraviolet rays.

  Conventionally, a surface irradiation apparatus that irradiates a surface to be irradiated with light from a plurality of lamps is widely known. As an example of these surface irradiation devices, UV curing paint or UV curing agent attached to the irradiated surface is cured by irradiating with ultraviolet rays from an ultraviolet lamp, and printing, painting, adhesion, etc. are performed on the irradiated surface. There is a surface irradiation device. Also, a technique is known in which two glass substrates are bonded using these surface irradiation devices so that liquid crystal injected between the two glass substrates does not leak (see, for example, Patent Document 1). .)

JP-A-8-146436

By the way, in recent years, there is a demand for a surface irradiation device that can irradiate light over a wider range. On the other hand, in order to suppress energy consumption, there is a demand for suppressing the number of lamps and the lamp length of the lamp used in the surface irradiation device.
This invention is made | formed in view of the situation mentioned above, and provides the surface irradiation apparatus which can suppress the number of lamps and the lamp length, and can irradiate light to a wider to-be-irradiated surface. Objective.

To achieve the above object, the present invention, the straight to the irradiator containing the straight tube lamp in the housing, enclose the periphery of the illuminated surface, towards the outside of the surface to be illuminated with an irradiation aperture And an auxiliary reflector that reflects light from the tubular lamp toward the irradiated surface, wherein the end plates provided at both ends of the straight tube lamp include the straight tube lamp. Provided at a location closer to the irradiated surface than the mounting position, and provided on both sides of the first curved portion with the first curved portion bent obliquely toward the outside in the longitudinal direction of the straight tube lamp. A second curved portion bent obliquely toward the outside in the longitudinal direction of the straight tube lamp within a range of angles not exceeding the first curved portion ,
The first curving portion, and wherein the second curving portion reflects light toward the longitudinal direction of the straight tube lamp on the illuminated surface.

In the above-described configuration, the straight tube lamp includes two irradiators arranged so as to be arranged in the longitudinal direction, and each of the irradiators has an illuminance at the end in the longitudinal direction of the irradiated surface. longitudinal is installed at the installation interval to be higher than the illuminance at the center, between the irradiator each other, reflecting light toward the longitudinal direction of the straight tube lamp to the central portion of the surface to be illuminated A reflective surface is provided.

  In the above-described configuration, the reflecting surface may be arranged in a V shape between the irradiators arranged so that the straight tube lamps are arranged in the longitudinal direction.

  In the above-described configuration, a triangular prism arranged between the irradiators may be provided, and the V-shaped reflection surface may be configured by the triangular prism.

  According to the present invention, there is provided a surface irradiation device including an auxiliary reflector, wherein an end plate of the straight tube lamp bends obliquely outward in a longitudinal direction of the straight tube lamp, In order to provide a curved portion that reflects the light directed in the longitudinal direction toward the irradiated surface, the light irradiated on the inner side of the housing in the longitudinal direction of the straight tube lamp is reflected by the curved portion of the end plate, It can be used for irradiating a portion with low illuminance within the irradiated surface, and the irradiated surface can be irradiated efficiently. As a result, the number of lamps and the lamp length can be suppressed, and light can be irradiated onto a wider surface to be irradiated.

It is a perspective view which shows typically schematic structure of the surface irradiation apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows typically schematic structure of a surface irradiation apparatus. It is a perspective view which shows typically schematic structure of a surface irradiation apparatus. It is a figure which shows an irradiator, (A) is a perspective view, (B) is a perspective view seen from the lower surface side, (C) is a perspective view seen from the front side, (D) is a perspective view seen from the side surface side. . It is a partial side view which shows the structure of an irradiator. It is a perspective view which shows the structure of an end plate. It is a figure which shows the light distribution of an irradiator, (A) is a light distribution diagram, (B) is a figure which shows the light distribution of a longitudinal direction, (C) is a figure which shows the light distribution of a transversal direction. It is a figure which shows the light distribution of the irradiator which is not bending an end plate, (A) is a light distribution diagram, (B) is a figure which shows the light distribution of a longitudinal direction, (C) shows the light distribution of a transversal direction. FIG. It is a figure which shows the structure of a triangular prism, (A) is a figure which shows the arrangement position of a triangular prism, (B) is an optical path figure of a triangular prism. It is a figure which shows the light distribution of a surface irradiation apparatus. It is a figure which shows the light distribution of the surface irradiation apparatus at the time of narrowing the installation space | interval of an irradiator without arrange | positioning a triangular prism. It is a figure which shows the light distribution of the surface irradiation apparatus at the time of widening the installation space | interval of an irradiator without arrange | positioning a triangular prism. It is a figure which shows typically schematic structure of the surface irradiation apparatus of the modification of this invention, (A) is a perspective view, (B) is a side view. It is a figure which shows the structure of a triangular prism, (A) is sectional drawing of a triangular prism, (B) is a table | surface which shows the effect by a triangular prism. It is a figure which shows the light distribution of the surface irradiation apparatus of a modification, (A) is a light distribution diagram when a triangular prism is not arrange | positioned, (B) is a light distribution diagram when a triangular prism is arrange | positioned.

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

  FIG. 1 is a perspective view showing a schematic configuration of a surface irradiation apparatus 1 according to the present embodiment, and is a view of the surface irradiation apparatus 1 as seen from the front side. FIG. 2 is a longitudinal sectional view showing a schematic configuration of the surface irradiation apparatus 1, and FIG. 3 is a perspective view showing a schematic configuration of the surface irradiation apparatus 1. 4 to 6 are diagrams showing the configuration of the irradiator 2. In addition, in order to show the structure of the irradiator 2 in an easy-to-understand manner, the housing 20 is not shown in FIGS. 3, 5, and 6.

  As shown in FIGS. 1 to 3, the surface irradiation device 1 includes a plurality of irradiators 2 and an auxiliary reflector 3 surrounding the irradiated surface. This is an apparatus for irradiating the irradiated surface 5 with light from the surface irradiation device 1 and the irradiator 2. The number of the irradiators 2 included in the surface irradiation device 1 can be appropriately set according to the size of the irradiated surface corresponding to the application of the surface irradiation device 1 and the irradiation target. The surface irradiation apparatus 1 can be suitably used, for example, for manufacturing a liquid crystal panel (such as liquid crystal alignment control or bonding). Moreover, the surface irradiation apparatus 1 irradiates and cures the ultraviolet curable paint or the ultraviolet curing agent applied to the irradiation target disposed in the irradiated surface 5 from the irradiator 2 to print and paint the irradiation target. Also, it can be suitably used as an ultraviolet irradiation device for performing bonding or the like.

  In the present embodiment, the following description will be given by taking as an example a surface irradiation apparatus 1 that irradiates a rectangular irradiated surface 5 having a width W and a length L of about 2400 mm using ten irradiators 2. . The surface irradiation apparatus 1 according to the present embodiment is preferably used in, for example, an attaching process of a liquid crystal panel that irradiates ultraviolet rays from an irradiator 2 and attaches two large liquid crystal substrates by ultraviolet curing in a so-called ODF process. It is a device that can.

  As shown in FIG. 1, in the surface irradiation apparatus 1, five irradiators 2 are arranged at predetermined intervals in the width W direction of the irradiated surface 5. Moreover, as shown in FIG. 2, the surface irradiation apparatus 1 has two irradiators 2 arranged at a predetermined interval in the length L direction of the surface to be irradiated. Thus, in the surface irradiation apparatus 1, as shown in FIG. 3, ten irradiation devices 2 are arranged in parallel to each other, and are irradiated in a rectangular shape having a predetermined width W and a predetermined length L. It is comprised so that the surface 5 may be irradiated.

  As shown in FIGS. 1 to 3, the surface irradiation device 1 includes an auxiliary reflector 3 provided so as to surround the irradiated surface 5. The auxiliary reflector 3 reflects the light from the straight tube lamp 10 toward the outside of the irradiated surface 5 from between the irradiator 2 and the irradiated surface 5 toward the irradiated surface 5. Is configured to do. The auxiliary reflection surface 3a provided inside the auxiliary reflector 3 has a surface of an increased reflection film (interference film) made of a dielectric multilayer film in order to increase the reflectance in a specific wavelength region and increase the illuminance on the irradiated surface 5. It may be configured as an interference film mirror coated on the surface. The auxiliary reflection surface 3a may also be configured as a metal dichroic mirror as one aspect of a dichroic mirror that transmits and cuts unnecessary wavelength regions without reflecting them. The auxiliary reflector 3 may be provided with an appropriate angle with respect to the irradiated surface 5 so that the irradiated surface 5 can be irradiated at a low illuminance.

  As shown in FIG. 4, the irradiator 2 has an open bottom type rectangular parallelepiped casing 20. A straight tube lamp 10 is provided in the housing 20 as a linear ultraviolet light source that emits light including ultraviolet rays. As the straight tube lamp 10, a high-pressure mercury lamp or a metal halide lamp can be used. In addition, a reflection mirror 11 that reflects light emitted from the straight tube lamp 10 to the opposite side to the irradiated surface is provided in the housing 20. An irradiation opening 21 is provided on the bottom surface of the housing 20. A filter frame 22 is attached to the irradiation opening 21 along the opening edge, and a wavelength selection filter 23 is provided in the filter frame 22. Ultraviolet rays radiated from the straight tube lamp 10 are reflected by the reflection mirror 11, pass through the wavelength selection filter 23, and are irradiated from the irradiation opening 21 provided on the bottom surface of the housing 20.

  The wavelength selection filter 23 is a transmission filter made of a dielectric multilayer film, and has an area that sufficiently covers the entire irradiation opening 21. The transmission wavelength range transmitted by the wavelength selection filter 23 is appropriately set according to the use application of the surface irradiation device 1, and in this embodiment, the optimum band for manufacturing a liquid crystal panel (such as liquid crystal alignment control and bonding). Is set.

  The straight tube lamp 10 is mounted in a socket (not shown) attached to the pair of end plates 24 a and 24 b and is fixed in the housing 20. The end plates 24 a and 24 b are provided substantially perpendicular to the longitudinal direction of the straight tube lamp 10. As shown in FIG. 5, the end plates 24 a and 24 b are bent obliquely toward the outer side in the longitudinal direction of the straight tube lamp 10 so that the bent portions 26 a and 26 b are bent downward from the mounting position of the straight tube lamp 10. Is provided. The curved portions 26a and 26b have a first curved portion 26a and a second curved portion 26b, and the first curved portion 26a and the second curved portion 26b have different angles with respect to the end plates 24a and 24b. have. In this embodiment, the 1st music part 26a is comprised so that it may have a larger angle with respect to the end plate 24a than the 2nd music part 26b. In addition, the 1st music part 26a and the 2nd music part 26b may be comprised so that it may have an equal angle.

  The 1st music part 26a is provided in both of a pair of end plates 24a and 24b. As shown in FIG. 6, the first curved portion 26a is formed by attaching a plate member separate from the end plates 24a and 24b below the socket mounting portion 25 of the end plates 24a and 24b to which sockets (not shown) are attached. Composed. The first curved portion 26a may be formed integrally with the end plates 24a and 24b and may be formed by processing a part of the end plates 24a and 24b.

The 2nd music part 26b is provided in the end plate 24a. The end plate 24a is disposed so as to face each other when the pair of irradiators 2 and 2 are arranged in the length L direction of the surface irradiation device 1. The end plates 24a and 24a facing each other are provided with second curved portions 26b and 26b, respectively. The 2nd music part 26b, 26b is provided in the position which pinched | interposed the 1st music part 26a in the end plate 24a of 1 sheet. The second curved portions 26 b and 26 b are formed obliquely toward the outer side in the longitudinal direction of the straight tube lamp 10 by bending the end plate 24 a or cutting obliquely.
A reflective film may be coated on the inner surface of the first curved portion 26a and the second curved portion 26b facing the straight tube lamp 10 to form a reflective surface.

7 and 8 are diagrams showing the light distribution of the irradiator 2. FIG. 7 shows the light distribution when the bent portions 26a and 26b are provided on the end plates 24a and 24b, and FIG. 8 shows the end plate 24a. , 24b shows the light distribution when the curved portions 26a, 26b are not provided. A part of the light emitted from the straight tube lamp 10 is wasted in the longitudinal direction of the straight tube lamp 10 and is emitted from the inside of the housing 20 without being irradiated from the irradiation opening 21. included. Since the surfaces of the curved portions 26a and 26b that face the straight tube lamp 10 are configured as reflecting surfaces as described above, the light irradiated on the inside of the housing 20 in the longitudinal direction of the straight tube lamp 10 is provided. Is reflected toward the irradiation opening 21 by the curved portions 26a and 26b. The angle of the curved portions 26a, 26b with respect to the end plates 24a, 24b is the portion where the illuminance falls in the irradiated surface when the curved portions 26a, 26b are not disposed on the end plates 24a, 24b (as indicated by the dotted line in FIG. 8). The angle is set appropriately so as to compensate for the irradiation to the enclosed area 50). In this way, by arranging the bent portions 26a and 26b on the end plates 24a and 24b, the light from the straight tube lamp 10 is effectively used to distribute the light distribution of the irradiator 2 to the straight tube lamp 10. can be extended in the longitudinal direction, it is possible to improve the uniformity asymmetric density at the irradiated plane.

  Further, as shown in FIG. 3, a triangular prism 30 is disposed at an intermediate position between the pair of irradiators 2 arranged in the length L direction of the irradiated surface 5. The triangular prism 30 has a length over the five irradiators 2 arranged in the width W direction of the irradiated surface 5, and is provided along the width W direction. Further, as shown in FIG. 9A, the triangular prism 30 is disposed close to the emission side of the wavelength selection filter 23 provided in the irradiator 2. The triangular prism 30 includes a pair of V-shaped surfaces extending in the width W direction as reflecting surfaces 30a and 30a. As shown in FIG. 9 (B), the triangular prism 30 has one of the irradiators 2 adjacent in the length L direction out of the light irradiated from the irradiator 2 via the wavelength selection filter 23, and the other of the lights. The light leaking toward the lower side of the irradiator 2 is reflected by the reflecting surface 30 a so as to irradiate the irradiated surface below the one irradiator 2. The angle formed by the reflecting surfaces 30 a and 30 a can be appropriately set according to the distance between the irradiators 2 and the length of the irradiated surface 5.

  FIG. 10 is a diagram showing an illuminance distribution on the irradiated surface 5 irradiated by the surface irradiation device 1 provided with the triangular prism 30 along the width W direction at a substantially intermediate position in the length L direction. On the other hand, FIG. 11 is a diagram showing an illuminance distribution on the irradiated surface 5 irradiated by the surface irradiation device that does not have the triangular prism 30 and in which the installation interval in the length L direction of the irradiator 2 is narrowed. And FIG. 12 is a figure which shows the illumination intensity distribution in the to-be-irradiated surface 5 irradiated with the surface irradiation apparatus which does not have the triangular prism 30, which widened the installation space | interval of the length L direction of the irradiator 2. FIG. As shown in FIG. 11, when the installation interval in the length L direction of the irradiator 2 is narrowed, the irradiated surface 5 is irradiated so that the illuminance at the center in the length L direction does not decrease. Can do. However, the illuminance decreases at both ends in the length L direction (area 51 surrounded by a dotted line in FIG. 11).

Also, as shown in FIG. 12, when the installation interval in the length L direction of the irradiator 2 is widened, the irradiated surface 5 is set so that the illuminance at both ends in the length L direction does not decrease. Can be irradiated. However, in the central portion in the length L direction (area 52 surrounded by a dotted line in FIG. 12), the illuminance decreases.
In the surface irradiation device 1 of the present embodiment, the straight tube lamp 10 is arranged on the irradiated surface 5 so that the illuminance does not decrease at both ends, and the intermediate position in the length L direction along the width W direction. Is provided with a triangular prism 30. The triangular prism 30 is configured to reflect the light from the irradiator 2 on the reflection surface 30a and irradiate the central portion in the length L direction where the illuminance decreases on the irradiated surface 5. As a result, as shown in FIG. 10, the irradiated surface 5 can be irradiated with high accuracy without lowering the illuminance at the center and both ends in the length L direction on the irradiated surface 5.

  FIG. 13 is a diagram illustrating a surface irradiation apparatus 100 according to a modification of the present embodiment. The surface irradiation apparatus 100 is configured to irradiate a rectangular irradiated surface 105 having a width W2 of 1800 mm and a length L2 of 1500 mm using four irradiators 2. In the following description, components similar to those in the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  As a light source of each irradiator 2 of the surface irradiation device 100, a straight tube lamp 10 that emits light including ultraviolet rays is used as in the above-described embodiment. Four irradiators 2 are provided side by side substantially parallel to each other along the direction of the width W2. The surface irradiation apparatus 100 is provided with an auxiliary reflector 103 so as to surround the irradiated surface 105. The auxiliary reflector 103 directs light that leaks out of the irradiated surface 105 from between the irradiator 2 and the irradiated surface 105 out of the light from the straight tube lamp 10 toward the irradiated surface 105. It is configured to reflect. In this modification, since the irradiator 2 of the above-described embodiment is used, an end plate 24a is provided on one end side in the longitudinal direction of the straight tube lamp 10, and an end plate 24b is provided on the other end side. It has been. However, the present invention is not limited to this, and a configuration using an irradiator in which end plates 24 a are provided on both ends in the longitudinal direction of the straight tube lamp 10 may be used.

In the vicinity of both ends in the longitudinal direction of each irradiator 2, there are provided reflection surfaces 130 a that reflect light leaking from the irradiator 2 toward the outside in the length L 2 direction toward the irradiated surface 105. The reflecting surface 130a has a length extending over the four irradiators 2 arranged in the width W2 direction of the surface to be irradiated 105, and is provided along the width W2 direction. The reflection surface 130a may be configured from one surface of the triangular prism 130. Although not shown, the reflecting surface 130a may be configured by a plate-like reflecting mirror.
The triangular prism 130 has a predetermined spread angle α and a height H as shown in FIGS. The spreading angle α and the height H of the triangular prism 130 are various such as the size of the irradiated surface 105, the number of lamps of the irradiator 2 provided in the surface irradiating apparatus 100, the irradiation distance from the irradiator 2 to the irradiated surface 105, and the like. It is set appropriately according to the conditions.

FIG. 15A is a diagram showing the illuminance distribution on the irradiated surface 105 irradiated by the surface irradiation apparatus that does not have the triangular prism 130. FIG. 15B is a diagram showing an illuminance distribution on the irradiated surface 105 irradiated by the surface irradiation apparatus 100 having the triangular prism 130. As shown in FIG. 15A, in the case where the triangular prism 130 is not provided, the illuminance is reduced at both ends of the irradiated surface 105 in the length L2 direction. The triangular prism 130 is configured to reflect light leaking from the irradiator 2 toward the outside in the length L direction toward an area where the illuminance decreases on the irradiated surface 105 when the triangular prism 130 is not provided. ing. The light leaking outward from both sides in the longitudinal direction of the irradiator 2 is reflected by the reflecting surface 130a of the triangular prism 130 to both ends of the irradiated surface 105 in the length L2 direction. Accordingly, to compensate for the illumination of the ends of the length L2 direction of the illuminated surface 105, it is possible to improve the uniformity Qi of the illuminated surface 105.

  As described above, according to the present embodiment, the irradiator 2 that houses the straight tube lamp 10 in the housing 20 having the irradiation opening 21 and the irradiated surface 5 are provided so as to surround the irradiated surface. And an auxiliary reflector 3 that reflects the light from the straight tube lamp 10 going out of the light toward the irradiated surface 5, and the end plates 24 a and 24 b of the straight tube lamp 10. Includes curved portions 26 a and 26 b that bend obliquely toward the outside in the longitudinal direction of the straight tube lamp 10 and reflect light directed in the longitudinal direction of the straight tube lamp 10 toward the irradiated surface 5. According to this configuration, the light of the straight tube lamp 10 irradiated on the inner side of the housing 20 is reflected by the curved portions 26a and 26b of the end plates 24a and 24b, and irradiation is performed at a place where the illuminance is low in the irradiated surface 5. Therefore, the irradiated surface 5 can be efficiently irradiated. Thereby, the number of lamps of the straight tube lamp 10 and the lamp length of the straight tube lamp can be suppressed, and light can be irradiated onto a wider irradiated surface 5.

  Further, according to the present embodiment, the reflecting surface 30 a that reflects the light leaking out in the longitudinal direction of the straight tube lamp 10 toward the irradiated surface 5 is provided between the irradiator 2 and the auxiliary reflector 3. It was. According to this configuration, the light from the straight tube lamp 10 leaking out of the surface irradiation device 1 from between the irradiator 2 and the auxiliary reflector 3 is reflected toward the irradiated surface 5 to be covered. It can be used for irradiating a portion with low illuminance within the irradiation surface 5. Thereby, the irradiated surface 5 can be efficiently irradiated, and the number of straight tube lamps 10 and the length of the straight tube lamp are suppressed, and light is irradiated onto a wider irradiated surface 5. Can do.

Moreover, according to this embodiment, the reflective surface 30a was arrange | positioned in V shape between the irradiators 2 and 2 arrange | positioned so that the straight tube | pipe lamp 10 may be located in a line with a longitudinal direction. According to this configuration, the straight tube lamp 10 is disposed with a predetermined gap width in the length L direction so that illuminance does not decrease at both ends in the length L direction of the irradiated surface 5. In addition, the straight tube lamp 10 is arranged with a predetermined gap width in the length L direction, and the reflection is arranged in a V shape at the central portion in the length L direction where the illuminance decreases in the irradiated surface 5. The light leaking out from the irradiator 2 can be reflected by the surfaces 30a and 30a. Thus, the irradiated surface 5 without illumination of the central portion and both end portions of the length L direction is reduced, it is possible to irradiate the irradiated surface 5 Hitoshi degree Hitoshi well.

Moreover, according to this embodiment, the triangular prism 30 arrange | positioned between the irradiators 2 and 2 arranged in the length L direction was provided, and the V-shaped reflective surfaces 30a and 30a were comprised with the said triangular prism 30. FIG. According to this configuration, one of the triangular prism 30, along the width W direction of the illuminated surface 5, with a simple configuration that arranged substantially intermediate position of the length L direction, well illuminated surface 5 Hitoshi Hitoshi degree Can be irradiated.

  The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,100 Surface irradiation apparatus 2 Irradiator 3,103 Auxiliary reflector 5,105 Surface to be irradiated 10 Straight tube lamp 20 Housing | casing 21 Irradiation opening 24a, 24b End plate 26a 1st curved part (curved part)
26b 2nd music part (music part)
30, 130 Triangular prism 30a, 130a Reflecting surface

Claims (4)

An irradiator that houses a straight tube lamp in a housing having an irradiation opening;
Enclose the periphery of the illuminated surface, wherein a surface illumination device and a auxiliary reflector for reflecting the irradiated surface of the light from the straight tube lamp towards the outside of the illuminated surface,
End plates provided at both ends of the straight tube lamp are:
A first curved portion bent obliquely toward the outside in the longitudinal direction of the straight tube lamp at a location closer to the irradiated surface than the mounting position of the straight tube lamp;
A second curved portion provided on both sides of the first curved portion and bent obliquely toward the outside in the longitudinal direction of the straight tube lamp within a range not exceeding the bending angle of the first curved portion. ,
Each of the first curved portion and the second curved portion reflects light traveling in the longitudinal direction of the straight tube lamp to the illuminated surface , and compensates for illuminance at the longitudinal end portion of the illuminated surface. The surface irradiation apparatus characterized by the above-mentioned. Including the two irradiators arranged so that the straight tube lamps are arranged in the longitudinal direction;
Each of the irradiators is installed at an installation interval in which the illuminance at the end in the longitudinal direction of the irradiated surface is higher than the illuminance at the center in the longitudinal direction,
Wherein during irradiator each other, the surface irradiated according to claim 1, characterized in that the light directed in the longitudinal direction of the straight tube lamp with a reflective surface for reflecting to the central portion of the surface to be illuminated apparatus.   3. The surface irradiation apparatus according to claim 2, wherein the reflecting surface is arranged in a V shape between the irradiators arranged so that the straight tube lamps are arranged in the longitudinal direction.   The surface irradiation apparatus according to claim 3, further comprising a triangular prism arranged between the irradiators, wherein the triangular prism constitutes the V-shaped reflection surface.