CN106483696B - Ultraviolet irradiator and ultraviolet irradiation device - Google Patents

Ultraviolet irradiator and ultraviolet irradiation device Download PDF

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Publication number
CN106483696B
CN106483696B CN201610245048.8A CN201610245048A CN106483696B CN 106483696 B CN106483696 B CN 106483696B CN 201610245048 A CN201610245048 A CN 201610245048A CN 106483696 B CN106483696 B CN 106483696B
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ultraviolet
liquid crystal
plane mirror
mirror
touch panel
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CN106483696A (en
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盐谷纱由
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Ushio Denki KK
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Ushio Denki KK
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133325—Assembling processes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Human Computer Interaction (AREA)
  • Liquid Crystal (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The invention provides an ultraviolet irradiator and an ultraviolet irradiation device, the ultraviolet irradiator comprises: a linear light source for emitting ultraviolet rays; a groove-shaped reflector for reflecting the ultraviolet rays from the light source; and a pair of 1 st and 2 nd plane mirrors disposed below the groove-like mirror so as to face each other in the longitudinal direction of the linear light source with an exit port of the groove-like mirror interposed therebetween, and when curing an adhesive of a liquid crystal touch panel as a workpiece, a configuration is provided in which a dot-like ultraviolet irradiation step carried on a side surface having a wiring substrate can be omitted. The ultraviolet irradiator is characterized in that the 1 st plane mirror is disposed so as to be inclined such that a lower end side approaches the 2 nd plane mirror, and at least a part of light reflected by the 1 st plane mirror passes below the 2 nd plane mirror.

Description

Ultraviolet irradiator and ultraviolet irradiation device
Technical Field
The present invention relates to an ultraviolet irradiator and an ultraviolet irradiator using a linear light source for emitting ultraviolet rays, and more particularly to an ultraviolet irradiator and an ultraviolet irradiator used for attaching a liquid crystal touch panel.
Background
Devices provided with liquid crystal touch panels are often manufactured and sold. A liquid crystal touch panel is configured such that a cover glass for protecting a liquid crystal panel is bonded to a surface of the liquid crystal panel with an adhesive so as to prevent air from entering between the cover glass and the liquid crystal panel.
The structure of the liquid crystal touch panel is disclosed in, for example, japanese patent application laid-open No. 2011-113047 (patent document 1).
Fig. 6 and 7 schematically show the structure of the touch panel 20, with fig. 6 being an exploded bottom perspective view and fig. 7 being a side sectional view.
The liquid crystal touch panel 20 includes a liquid crystal panel 21 and a cover glass 22 bonded thereto, and the cover glass 22 is a transparent glass substrate and is slightly larger than the liquid crystal panel 21. A black paint or a black deposited film called a Black Matrix (BM)23 is formed in a frame shape on the peripheral portion of the cover glass 22 on the liquid crystal panel 21 side. The black matrix 23 is provided so that light leaking from the periphery of the liquid crystal panel 22 does not leak from the touch panel 20, and is formed to cover (overlap) a range of about 1mm to 2mm in the periphery of the liquid crystal panel 21.
A film-like wiring substrate 24 for operating the liquid crystal substrate is provided on one side frame of the liquid crystal panel 21.
An ultraviolet-curable adhesive 25 is used for bonding the liquid crystal panel 21 and the cover glass 22. The adhesive 25 is uniformly applied to the entire surface of the liquid crystal panel 21, and the cover glass 22 is placed thereon. In this state, when ultraviolet rays are irradiated to the adhesive 25, the adhesive is cured to fix the liquid crystal panel 21 and the cover glass 22, thereby completing the liquid crystal touch panel 20.
In order to cure the adhesive 25, as shown in fig. 7, first, ultraviolet rays are irradiated from the glass cover 22 side to cure the adhesive in the region surrounded by the black matrix 23. Then, in order to cure the region that is not cured and becomes the shadow of the black matrix 23, the adhesive in the region is cured by irradiating ultraviolet light from the liquid crystal panel 21 side.
As a device for curing such an adhesive, an ultraviolet irradiation device shown in fig. 8 and 9 is generally used.
The ultraviolet irradiation device 30 is composed of an ultraviolet irradiator 31 and a touch panel conveying mechanism (conveying conveyor) 32.
The ultraviolet irradiator 31 includes an ultraviolet irradiation unit 33 and plane mirrors 36 and 37. The ultraviolet irradiation unit 33 includes a rod-shaped ultraviolet lamp 34 that emits ultraviolet rays, and a reflector 35 in the shape of a rain gutter that reflects light from the rod-shaped ultraviolet lamp 34. As the ultraviolet lamp 34, a high-pressure mercury lamp, a metal halide lamp, or the like can be used.
The groove-like reflecting mirror 35 is in the form of a groove extending in the longitudinal direction of the rod-like ultraviolet lamp 34.
The pair of the 1 st plane mirror 36 and the 2 nd plane mirror 37 are disposed in parallel and opposed to each other in the longitudinal direction of the rod-shaped ultraviolet lamp 34 through the exit port below the groove-shaped reflecting mirror 35, and thereby functions to suppress the spread of the ultraviolet rays emitted from the ultraviolet irradiation portion 33 and to shape the ultraviolet irradiation region L.
A touch panel conveying mechanism (conveying conveyor) 32 is disposed below the ultraviolet irradiator 31 and conveys the touch panel 20.
Next, a curing step of the adhesive will be described.
A first step; as shown in fig. 8(a), first, the touch panel 20 is placed on the conveyor 32 with the cover glass 22 side of the touch panel 20 facing upward toward the ultraviolet irradiator 31 side, conveyed to pass below the ultraviolet irradiator 31, and irradiated with ultraviolet rays.
Thereby, as shown in fig. 8(B), the adhesive 25 is cured in the region a surrounded by the black matrix 23.
In the second step, as shown in fig. 9(a), the touch panel 20 having undergone the first step is inverted and placed so that the liquid crystal panel 21 side faces upward toward the ultraviolet irradiator 31 side. The touch panel 20 is conveyed by the conveyor 32, and irradiated with ultraviolet light from the liquid crystal panel 21 side.
Here, although the liquid crystal panel 21 is non-transmissive and ultraviolet rays do not pass through it to irradiate the adhesive 25, there is a case where the ultraviolet rays from the ultraviolet ray irradiator 31 are reflected by the pair of plane mirrors 36 and 37 to irradiate the liquid crystal touch panel 20 with a slight inclination component and enter the outer surface of the adhesive 25 as shown in fig. 9 (B).
Thus, although a part of the outer surface of the region (B) of the adhesive 25 which is not cured and becomes a shadow of the black matrix 23 is cured in the first irradiation step, the pair of plane mirrors 36 and 37 are arranged in parallel to shape the rectangular ultraviolet irradiation region in order to suppress the spread of the ultraviolet rays emitted from the ultraviolet irradiation device 31, and therefore the oblique component of the ultraviolet rays is not actively generated, and the above-mentioned oblique component is insufficient, and the curing depth thereof is insufficient.
As shown in fig. 6, a film-like wiring board 24 is provided on one side of the liquid crystal panel 21, and the wiring board 24 is flexible but opaque to ultraviolet rays because it is thin in a sheet shape.
Therefore, in the second step, as shown in fig. 10 a, in the first step, although some regions are cured without the outer side surface of the adhesive 25 being insufficient for the three sides of the wiring board 24 in the uncured region (B) shaded by the black matrix 23, some region C of the wiring board 24 is not irradiated with ultraviolet rays at all and remains as an uncured region (C).
When the uncured portion remains in this way, curing failure as a whole and appearance failure are caused, and therefore, it is necessary to cure the entire region of the adhesive 25 between the liquid crystal panel 21 and the cover glass 22.
Here, after the first step and the second step are performed by the ultraviolet irradiation device 30 shown in fig. 8 and 9, the touch panel manufacturer performs a third step operation for curing the uncured portion C, particularly the side having the wiring substrate 24, by the equipment 40 for irradiating ultraviolet rays in a spot shape as shown in fig. 10 (B).
That is, the film-like wiring substrate 24 is lifted upward, and ultraviolet rays are irradiated from the side of the touch panel 20 by the point-like ultraviolet irradiator 40 to cure the uncured region C of the adhesive 25 located between the black matrix 23 of the cover glass 22 and the wiring substrate 24 of the liquid crystal panel 21.
In the third step using the dot-shaped ultraviolet irradiator 40, as shown in fig. 9(B), when the outer surface of the adhesive 25 on the other three sides of the wiring substrate 24 is not sufficiently cured in the second step of irradiating ultraviolet rays from the liquid crystal panel 21 side, the third step is also performed on the three sides.
In this way, the bonding of the liquid crystal panel 21 and the cover glass 22 requires the following three steps: (1) irradiating ultraviolet rays from the side of the cover glass; (2) irradiating ultraviolet rays from the liquid crystal panel side; (3) the light is irradiated from the side (the wiring board is turned up).
In touch panel factories, it is desired to reduce the number of steps of ultraviolet irradiation that have been performed three times, and particularly, it is strongly desired to eliminate the third step, which is a manual operation by an operator.
Patent document 1: japanese patent laid-open publication No. 2011-113047
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides an ultraviolet irradiator comprising: a linear light source for emitting ultraviolet rays; a groove-shaped reflector for reflecting the ultraviolet rays from the light source; and a pair of 1 st and 2 nd plane mirrors disposed below the groove-like mirror so as to face each other in the longitudinal direction of the linear light source with an exit port of the groove-like mirror interposed therebetween, wherein in the step of bonding the liquid crystal panel of the liquid crystal touch panel to the cover glass by the ultraviolet irradiator, the entire adhesive can be cured including a portion located between the black matrix formed on the cover glass and the wiring substrate of the liquid crystal panel only by two ultraviolet irradiation steps of irradiating ultraviolet rays from the cover glass side and irradiating ultraviolet rays from the liquid crystal panel side.
In response to such a problem, the inventors of the present invention have diligently studied and found that as the component of the ultraviolet light incident obliquely to the touch panel increases, the more the ultraviolet light can be incident between the black matrix and the wiring board, and the adhesive in that portion is cured.
In order to solve the above-described problems, the ultraviolet irradiator according to the present invention is characterized in that the 1 st plane mirror is disposed such that a lower end side of the 1 st plane mirror is inclined in proximity to the 2 nd plane mirror, and at least a part of light reflected by the 1 st plane mirror passes below the 2 nd plane mirror.
Further, the 1 st plane mirror is rotatably supported, and an inclination angle thereof is adjustable.
The 1 st plane mirror is composed of a 1 st mirror portion disposed in parallel with the 2 nd plane mirror and a 2 nd mirror portion provided obliquely to a lower end of the 1 st mirror portion.
Further, the 2 nd mirror portion of the 1 st plane mirror is attached to be adjustable in the vertical direction with respect to the 1 st mirror portion.
The ultraviolet irradiation apparatus is characterized by comprising the ultraviolet irradiator, and a conveying mechanism for conveying the object to be treated is provided below the ultraviolet irradiator, and at least a part of the light reflected from the 1 st plane mirror irradiates the object to be treated from obliquely above.
The object to be processed is a liquid crystal touch panel including a liquid crystal panel having a wiring board and a cover glass bonded to the liquid crystal panel with an adhesive, and the liquid crystal touch panel is configured such that the wiring board is transported in a transport direction of the transport mechanism on the opposite side of the 1 st plane mirror.
The invention has the following effects:
according to the ultraviolet irradiator and the ultraviolet irradiation device of the present invention, in the curing operation of the adhesive for bonding the liquid crystal panel and the cover glass of the liquid crystal touch panel as the object to be processed, since the ultraviolet ray having a sufficient tilt component is irradiated from above the touch panel, the region to be shaded by the black matrix of the cover glass and the region to be shaded by the wiring substrate of the liquid crystal panel can be cured by the ultraviolet ray of the tilt component, and the entire adhesive can be cured only by two ultraviolet irradiation steps of irradiating the ultraviolet ray from the side of the cover glass and the ultraviolet ray from the side of the liquid crystal panel, so that the complicated and troublesome operation of irradiating the ultraviolet ray from the side by the manual operation can be omitted.
Further, since the inclination angle of the 1 st plane mirror can be adjusted, it is possible to perform appropriate oblique irradiation corresponding to the object to be processed.
Further, since the 2 nd mirror portion of the 1 st plane mirror that is inclined can be adjusted in the up-down direction, the ultraviolet rays reflected by the 2 nd mirror portion can be appropriately passed below the 1 st plane mirror.
Drawings
Fig. 1 is a schematic view of an ultraviolet irradiator and an ultraviolet irradiation device of the present invention.
Fig. 2 is a schematic view of another embodiment of the ultraviolet irradiator of the present invention.
Fig. 3 is a schematic view of another embodiment of the ultraviolet irradiator of the present invention.
Fig. 4 is a cross-sectional view illustrating a curing action of the liquid crystal touch panel by ultraviolet irradiation.
FIG. 5 is an evaluation table showing the angle and the hardening range of the mirror according to the present invention.
Fig. 6 is an exploded perspective view of the liquid crystal touch panel as viewed from below.
Fig. 7 is a sectional view of the liquid crystal touch panel.
Fig. 8 is an explanatory view (a) of the first step of ultraviolet irradiation by the conventional ultraviolet irradiation apparatus and a sectional view (B) of the liquid crystal touch panel after the treatment.
Fig. 9 is an explanatory view (a) of the 2 nd step of ultraviolet irradiation by the conventional ultraviolet irradiation apparatus and a sectional view (B) of the liquid crystal touch panel after the treatment.
Fig. 10 is a partial sectional view (a) and an explanatory view (B) of a third irradiation step for explaining a problem of the ultraviolet treatment according to the conventional technique.
Description of the symbols
1 ultraviolet irradiator
2 ultraviolet ray irradiation part
3 Linear light source
4 groove-shaped reflector
6 st plane reflector
6a 1 st mirror part
6b 2 nd mirror part
6c support
7 nd 2 nd plane reflector
9 handling mechanism (conveyor)
10 ultraviolet irradiation device
20 liquid crystal touch panel
21 liquid crystal panel
22 cover glass
23 black matrix
24 wiring substrate
25 adhesive
A hardened zone
B, C unhardened area
X has a hardened region at the side of the wiring substrate
Y hardened region at side surface without wiring substrate
Detailed Description
Fig. 1 is a schematic view of an ultraviolet irradiator and an ultraviolet irradiation device of the present invention.
The ultraviolet irradiator 1 includes an ultraviolet irradiation unit 2 and a pair of 1 st and 2 nd plane mirrors 6 and 7. The ultraviolet irradiation unit 2 includes a linear ultraviolet light source 3 that emits ultraviolet light, and a gutter-shaped reflector 4 that reflects light emitted from the linear ultraviolet light source 3. As the ultraviolet light source 3, a rod-shaped ultraviolet lamp such as a high-pressure mercury lamp or a metal halide lamp, an LED light source in which LEDs are linearly arranged, or the like can be used.
The groove-like reflecting mirror 4 is formed in a rain-like groove shape extending in the longitudinal direction of the linear ultraviolet light source 3.
The pair of 1 st and 2 nd plane mirrors 6 and 7 are disposed below the groove-like mirror 4 so as to face each other in the longitudinal direction of the linear light source 3 through the exit port of the groove-like mirror 4.
The 1 st plane mirror 6 is pivotally supported at its upper end so as to be rotatable, and is disposed so that the inclination angle thereof can be adjusted, and the lower end side thereof is disposed so as to be inclined close to the 2 nd plane mirror 7, and at least a part of the light reflected by the 1 st plane mirror 6 passes below the 2 nd plane mirror 7.
A transport conveyor 9 is disposed below the ultraviolet irradiator 1, and a liquid crystal touch panel 20 as a treatment target is placed on the transport conveyor 9.
The ultraviolet irradiator 1 and the conveying mechanism (conveying conveyor) 9 constitute an ultraviolet irradiation device 10.
Here, although the inclined 1 st plane mirror 6 may be positioned on either side with respect to the conveying direction, the liquid crystal touch panel 20 placed on the conveying conveyor 9 is placed such that the side surface having the wiring substrate 24 is positioned on the 2 nd plane mirror 7 side, which is the opposite side from the 1 st plane mirror 6 with respect to the conveying direction.
Fig. 1 shows an example in which the 1 st plane mirror 6 is positioned on the downstream side in the conveying direction, and the side surface of the liquid crystal touch panel 20 having the wiring substrate 24 is placed on the conveying conveyor 9 so as to be on the upstream side.
Fig. 2 shows another embodiment, and the 1 st plane mirror 6 is composed of a 1 st mirror portion 6a and a 2 nd mirror portion 6 b. The 1 st mirror portion 6a is provided parallel to the 2 nd plane mirror 7, the 2 nd mirror portion 6b is provided rotatably at the lower end of the 1 st mirror portion 6a, the tilt angle is adjustable, and the lower end side of the 2 nd mirror portion 6b is provided obliquely close to the 2 nd plane mirror 7.
Fig. 3 shows another embodiment as a modification of the embodiment of fig. 2, in which the 2 nd mirror part 6b of the 1 st plane mirror 6 is supported so that the position in the vertical direction is adjustable with respect to the 1 st mirror part 6 a.
That is, the support 6c of the 2 nd mirror portion 6b is slidably supported by the 1 st mirror portion 6a, and is fixed by a screw 8 or the like so that the position in the vertical direction can be adjusted. The 2 nd mirror portion 6b is pivotally mounted to the support 6c so as to be rotatable, and is adjustable with respect to the tilt angle.
In the embodiment of fig. 2 and 3, similarly to the embodiment shown in fig. 1, at least a part of the light reflected by the 2 nd mirror portion 6b of the 1 st plane mirror 6 passes below the 2 nd plane mirror 7, and is irradiated to the liquid crystal touch panel 20 on the transport conveyor 9 from obliquely above.
Fig. 4 shows a case where the liquid crystal touch panel 20 is irradiated with ultraviolet rays and the adhesive is cured according to the present invention.
As shown in fig. 4(a), first, the liquid crystal touch panel 20 is irradiated with ultraviolet rays from the cover glass 22 side of the liquid crystal touch panel 20. At this time, the adhesive 25 in the area a, which is surrounded by the black matrix 23, that is, the screen is cured by the vertical light component. Then, on the side surface having the wiring substrate 24, the oblique light component of the ultraviolet light reflected by (the 2 nd mirror part 6b of) the 1 st plane mirror 6 is irradiated so as to intrude below the black matrix 23 of the cover glass 22, and is cured to a predetermined region X which becomes the shadow of the black matrix 23.
Next, as shown in fig. 4(B), when the liquid crystal touch panel 20 is inverted and ultraviolet light is irradiated from the liquid crystal panel 21 side, the oblique light component is irradiated from the outer side surface of the liquid crystal touch panel 20 and enters from the outer side surface of the adhesive 25, and the adhesive 25 is cured to the predetermined region Y.
When ultraviolet rays are irradiated from the cover glass 22 side, since a large amount of oblique light components having a large inclination angle can be irradiated as compared with oblique light components reflected by a pair of plane mirrors arranged in parallel in the conventional technique, even if the side surface having the wiring substrate 24 is provided, the area entering below the black matrix 23 becomes large, and the width of the cured area X based on this becomes large.
When ultraviolet light is irradiated from the liquid crystal panel 21 side, the area below the liquid crystal panel 21 becomes large because the incident angle from the outer surface of the liquid crystal touch panel 20 is large even if the side surface of the wiring substrate 24 is not present, and the width of the cured area Y of the adhesive becomes large even on the side surface.
Table 1 of fig. 5 shows the results of examining the hardness range X at the side surface having the wiring substrate 24 by changing the inclination angle of the 1 st plane mirror 6 (or the 1 st mirror portion 6a) in the present invention.
Here, the mirror angle θ is an angle formed by the 1 st plane mirror 6 (2 nd mirror part 6b) and the vertical line, and the curing range a is a curing distance of the adhesive 25 from the inner side surface of the black matrix 23 at the side surface of the wiring substrate 24.
In general, the distance (width) by which the cover glass 23 covers the peripheral portion of the liquid crystal panel 21 is about 1 to 2mm, and the hardening range a is 1mm or more.
As is clear from Table 1, when the mirror angle θ is set to 20 ° to 40 °, the curing range A exceeds 1 mm.
As described above, according to the ultraviolet irradiator and the ultraviolet irradiation device of the present invention, since the 1 st plane mirror of the pair of plane mirrors provided below the groove-like mirrors surrounding the linear light source is disposed to be inclined so as to be close to the 2 nd plane mirror of the other pair of plane mirrors, and at least a part of the light reflected by the 1 st plane mirror passes below the 2 nd plane mirror, the light reflected by the 1 st plane mirror has a large inclined light component, and when irradiated from the glass cover side, the light enters the black matrix so as to enter the black matrix below the black matrix, and penetrates into the adhesive below the black matrix deeply to be cured.
Further, even when light is emitted from the liquid crystal panel side, light having a large tilt component is emitted from the outer surface of the liquid crystal touch panel, and therefore, the light can penetrate deeply into the area below the black matrix to become uncured, and the cured area can be enlarged.
In this way, in particular, it is possible to obtain an effect that a troublesome step of performing conventionally necessary dot-like ultraviolet irradiation on the side surface having the wiring substrate is omitted, and a sufficient cured region can be obtained by two steps of irradiation from the glass cover sheet side and irradiation from the liquid crystal panel side.

Claims (3)

1. An ultraviolet irradiation apparatus, comprising: a linear light source for emitting ultraviolet rays; a groove-shaped reflector for reflecting the ultraviolet rays from the light source; and a pair of 1 st and 2 nd plane mirrors disposed below the groove-like mirror so as to face each other in the longitudinal direction of the linear light source with an exit port of the groove-like mirror interposed therebetween,
the disclosed device is provided with:
an ultraviolet irradiator arranged such that the 1 st plane mirror is inclined so that a lower end side approaches the 2 nd plane mirror, and at least a part of light reflected by the 1 st plane mirror passes below the 2 nd plane mirror; and
a conveying mechanism for conveying the object to be processed under the ultraviolet irradiator,
the 1 st plane mirror is provided on a downstream side in a conveying direction, and the object to be processed is irradiated from obliquely above with light reflected by the 1 st plane mirror and passing below the 2 nd plane mirror.
2. The ultraviolet irradiation apparatus as set forth in claim 1,
the object to be processed is a liquid crystal touch panel including a liquid crystal panel having a wiring substrate and a cover glass bonded to the liquid crystal panel with an adhesive, and the liquid crystal touch panel is disposed so that the wiring substrate is conveyed in a conveying direction of the conveying mechanism on the opposite side of the 1 st plane mirror.
3. The ultraviolet irradiation apparatus according to claim 1 or 2, wherein the 1 st plane mirror is rotatably supported so that an inclination angle is freely adjustable.
CN201610245048.8A 2015-08-28 2016-04-19 Ultraviolet irradiator and ultraviolet irradiation device Active CN106483696B (en)

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