KR20150144313A - Laser irradiation device and manufacturing method of laminate optical member - Google Patents

Abstract

An object of the present invention is to provide a laser light irradiation apparatus and an apparatus for manufacturing an optical member joined body capable of cutting an object sharply and suppressing deterioration in cut quality, and a laser oscillator A condenser lens 141 for condensing the laser beam radiated from the laser oscillator, a diaphragm member 143 for fixing the laser beam condensed by the condenser lens, and a collimator for collimating the laser beam, And a collimator lens 145 that converges the collimated light.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for manufacturing a laser beam irradiating apparatus and an optical member joined body,

The present invention relates to an apparatus for manufacturing a laser light irradiation apparatus and an optical member joined body. The present application claims priority based on Japanese Patent Application No. 2013-26096 filed on February 13, 2013, the contents of which are incorporated herein by reference.

2. Description of the Related Art Conventionally, there is known a laser irradiation apparatus for irradiating an object with laser light to perform predetermined processing. The laser light irradiating apparatus is studied for use in cutting a film, and is expected to be applied to, for example, a method of manufacturing a polarizing film as described in Patent Document 1. [

Japanese Patent Application Laid-Open No. 2003-255132

Generally, the intensity of laser light is strong at the center of the beam and small at the outer periphery of the beam. When the laser light intensity at the outer peripheral portion of the beam becomes small, the outer peripheral portion of the beam does not contribute to the cutting of the object. Therefore, when laser light having such a strength distribution is used, the object can not be cut sharply, and the cut quality may deteriorate in some cases.

An object of the present invention is to provide an apparatus for manufacturing a laser beam irradiating apparatus and an optical member joined body which can cut an object sharply and suppress deterioration of cut quality.

In order to achieve the above object, an apparatus for manufacturing a laser light irradiation apparatus and an optical member joined body according to an aspect of the present invention employs the following configuration.

(1) A laser irradiation apparatus according to a first aspect of the present invention includes a laser oscillator for emitting laser light, a condenser lens for condensing the laser light emitted from the laser oscillator, A diaphragm member for tightening the laser beam, and a collimator lens for collimating the laser beam tightened by the diaphragm member.

(2) In the laser irradiation apparatus described in (1) above, the diaphragm member may be disposed in the vicinity of the rear focal point of the condensing lens.

(3) A laser irradiation apparatus according to a second aspect of the present invention includes a table having a holding surface for holding an object, a laser oscillator for emitting laser light, and a condenser for condensing the laser light emitted from the laser oscillator A collimator lens for collimating the laser beam that is tightened by the diaphragm member; and a second collimating lens for collimating the laser beam collimated by the collimator lens, And a moving device for moving the table and the scanner relative to each other.

(4) The laser irradiation apparatus described in (3) may include a second condenser lens for condensing the laser light collimated by the collimator lens toward the holding surface.

(5) An apparatus for manufacturing an optical member joined body according to a third aspect of the present invention is an apparatus for manufacturing an optical member joined body formed by bonding an optical member to an optical display component, A joining device for joining the sheet piece to the sheet joining piece to form a sheet joining piece by joining the sheet piece to the sheet joining piece; (1) to (4), wherein the sheet member is a sheet member having a size corresponding to the bonding surface, A laser processing apparatus comprising a laser light irradiating apparatus according to any one of claims 1 to 4, wherein the laser light irradiated from the laser light irradiating device Stage is.

According to the aspect of the present invention, it is possible to provide an apparatus for manufacturing a laser light irradiation apparatus and an optical member joined body which can cut an object sharply and suppress deterioration of cut quality.

1 is a perspective view showing a laser light irradiation apparatus according to a first embodiment of the present invention.
2 is a diagram showing a configuration of an EBS.
3 is a perspective view showing an internal configuration of the IOR.
4 is a side sectional view showing the arrangement of the first condenser lens, the diaphragm member, and the collimator lens.
5 is a diagram showing a configuration of a control system of the laser light irradiation apparatus.
6 (a) to 6 (d) are diagrams for explaining the action of the EBS.
Figs. 7A to 7D are diagrams showing one pulse of laser light in Fig. 6. Fig.
8 is a diagram for explaining the action of the IOR.
Fig. 9 is an enlarged view of a cut surface when a polarizing plate as an object is cut, using a laser light irradiation apparatus according to a comparative example. Fig.
10 is an enlarged view of a cut surface when a polarizing plate as an object is cut by using the laser light irradiation apparatus according to the present embodiment.
11 is a schematic diagram showing an apparatus for manufacturing an optical member joined body according to the first embodiment of the present invention.
12 is a plan view of the liquid crystal panel.
13 is a sectional view taken along the line AA of Fig.
14 is a sectional view of the optical sheet.
15 is a diagram showing the operation of the cutting apparatus.
16 is a plan view showing the step of detecting the edge of the joint surface.
17 is a schematic diagram of the detection device.
18A is a diagram showing an example of a method of determining the position of the sheet piece to be joined to the liquid crystal panel.
Fig. 18B is a diagram showing an example of a method of determining the position of joining a sheet piece with respect to the liquid crystal panel. Fig.
19 is a diagram showing a control method for drawing a desired locus of laser light.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

In all of the following drawings, dimensions, ratios, and the like of the respective components are appropriately different in order to make the drawings easy to see. In the following description and drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

(Laser light irradiation apparatus)

1 is a perspective view showing an example of a laser irradiation apparatus 100 used as a cutting device of an object.

In the following description, the XYZ orthogonal coordinate system is set as necessary, and the positional relationship of the respective members is described with reference to the XYZ orthogonal coordinate system. In this embodiment, the direction parallel to the holding surface for holding the object is the X direction, and the direction orthogonal to the first direction (X direction) in the surface of the holding surface is the Y direction, the X direction, And the direction orthogonal to the Y direction is the Z direction.

1, the laser irradiation apparatus 100 includes a table 101, a laser oscillator 102, and an EBS 130 (Electrical Beam Shaping: see FIG. 2) An acousto-optical element 103, an IOR 104 (imaging optical rail), a scanner 105, a mobile device 106, and a control device 107 for collectively controlling these devices have.

The table 101 has a holding surface 101s for holding the object 110. [ The table 101 is rectangular when viewed from the normal direction of the holding surface 101s. The holding surface 101s has a rectangular first holding surface 101s1 having a long side in the first direction (X direction) and a second holding surface 101s1 arranged adjacent to the first holding surface 101s1, And a second holding surface 101s2 having the same shape as the surface 101s1.

The laser oscillator 102 is a member that emits laser light L. For example, as the laser oscillator 102, an oscillator such as a CO ₂ laser oscillator (carbon dioxide laser oscillator), a UV laser oscillator, a semiconductor laser oscillator, a YAG laser oscillator, or an excimer laser oscillator can be used. Do not. Among the above oscillators, a CO ₂ laser oscillator can emit high output laser light capable of cutting an optical member such as a polarizing film.

2 is a diagram showing a configuration of the EBS 130. As shown in FIG.

2, the EBS 130 includes an acousto-optical element 103 disposed on the optical path of the laser beam emitted from the laser oscillator 102, and a drive circuit 103 electrically connected to the acousto- And a control unit 107 (corresponding to a laser control unit 171 described later) for controlling the timing at which the laser light passes through the acoustooptic element 103. The control unit 107 controls the timing at which the laser light passes through the acousto-

The EBS 130 shields the laser light until the output of the laser light becomes stable.

The acousto-optical element 103 is an optical element for shielding the laser light emitted from the laser oscillator 102.

The acousto-optical element 103 is obtained by adhering a piezoelectric element to an acoustooptic medium made of, for example, single crystal such as tellurium dioxide (TeO ₂ ) or lead molybdate (PbMoO ₄ ) or glass. It is possible to control passage and non-passage (shielding) of the laser light by applying an electric signal to the piezoelectric element to generate ultrasonic waves and causing the ultrasonic waves to propagate in the acoustic optical medium.

In this embodiment, the acousto-optical element 103 is used as the constituent member of the EBS 130, but the present invention is not limited to this. Other optical elements may be used as long as they can shield the laser light emitted from the laser oscillator 102.

The drive driver 131 supplies an electric signal (control signal) for generating an ultrasonic wave to the acousto-optical element 103 under the control of the control device 107, Adjust the shielding time.

The control device 107 controls the timing at which the laser light passes through the acoustooptic element 103, for example, such that the rising portion and the falling portion of the laser light emitted from the laser oscillator 102 are removed.

The timing control by the control device 107 is not limited to this. For example, the control device 107 may control the timing at which the laser light passes through the acoustooptic element 103 so that the rising portion of the laser light emitted from the laser oscillator 102 is selectively removed.

Particularly, when the width (time) of the falling portion of the laser beam emitted from the laser oscillator 102 is sufficiently shorter than the width (time) of the rising portion of the laser beam, the effect of removing the falling portion of the laser beam is small. Therefore, in such a case, only the rising portion of the laser beam emitted from the laser oscillator 102 may be selectively removed.

With this configuration, based on the control of the control device 107, the EBS 130 radiates the laser beam emitted from the laser oscillator 102 in a stable output state.

The IOR 104 removes a portion of the intensity distribution of the laser beam that does not contribute to the cutting of the object 110.

Fig. 3 is a perspective view showing the internal configuration of the IOR 104. Fig.

3, the IOR 104 includes a first condenser lens 141 for condensing the laser light emitted from the EBS 130, a first condenser lens 141 for condensing the laser light emitted from the first condenser lens 141 for holding the first condenser lens 141, A diaphragm member 143 for holding the laser beam focused by the first condenser lens 141, a holding member 144 for holding the diaphragm member 143, A collimator lens 145 for collimating the laser light that is collimated by the collimator lens 145, a second holding frame 146 for holding the collimator lens 145, a first holding frame 142, 144 and the second holding frame 146 relative to each other.

4 is a side cross-sectional view showing the arrangement of the first condenser lens 141, the diaphragm member 143, and the collimator lens 145. Fig.

As shown in Fig. 4, a pinhole 143h is formed in the diaphragm member 143 to tighten the laser beam condensed by the first condenser lens 141. In Fig. The center of each of the first condenser lens 141, the pinhole 143h and the collimator lens 145 is disposed at a position overlapping the optical axis CL of the laser beam emitted from the EBS 130.

The diaphragm member 143 can be disposed in the vicinity of the rear focal point of the first condenser lens 141. [

Here, the "near the rear focal point of the first condenser lens 141" means that the arrangement position of the diaphragm member 143 does not deviate greatly from the rear focal point of the first condenser lens 141, It means that it may be slightly different. For example, the distance K1 from the center of the first condensing lens 141 to the rear-side focal point of the first condensing lens 141 and the distance K1 from the center of the first condensing lens 141 to the pin- And the distance K2 to the center of the first condenser lens 141 is in the range of 0.9 / 1 or more and 1.1 / 1 or less, the diaphragm member 143 is located near the rear focal point of the first condenser lens 141 As shown in Fig. In this range, the laser beam condensed by the first condenser lens 141 can be effectively tightened.

Although the diaphragm member 143 can be disposed in the vicinity of the rear focal point of the first condenser lens 141, the position of the diaphragm member 143 is not necessarily limited to this position. The position of the diaphragm member 143 may be an optical path between the first condenser lens 141 and the collimator lens 145 and is not limited to the vicinity of the rear focal point of the first condenser lens 141. [

3, the moving mechanism 147 moves each of the first holding frame 142, the holding member 144, and the second holding frame 146 in the direction parallel to the traveling direction of the laser light A slider mechanism 148, and a holding support 149 for holding the slider mechanism 148.

For example, by moving the first holding frame 142 and the second holding frame 146 in the direction parallel to the advancing direction of the laser light, with the holding member 144 in the correct position, 1 holding frame 142, the holding member 144, and the second holding frame 146 are mutually positioned. Specifically, the diaphragm member 143 is disposed at the position of the front focal point of the collimator lens 145 and at the position of the rear focal point of the first condenser lens 141.

Returning to Fig. 1, the scanner 105 scans the laser beam in a plane parallel to the holding surface 101s (in the XY plane). That is, the scanner 105 relatively moves the laser beam relative to the table 101 in the X direction and the Y direction. As a result, it is possible to irradiate the laser light with high precision to an arbitrary position of the object 110 held on the table 101.

The scanner 105 is provided with a first irradiation position adjusting device 151 and a second irradiation position adjusting device 154.

The first irradiation position adjusting device 151 and the second irradiation position adjusting device 154 are provided with a scanning device for biaxially scanning the laser light emitted from the IOR 104 in a plane parallel to the holding surface 101s Respectively. As the first irradiation position adjusting device 151 and the second irradiation position adjusting device 154, for example, a galvanometer scanner is used. The scanning element is not limited to a galvanometer scanner, and a gimbal may be used.

The first irradiation position adjusting device 151 includes a mirror 152 and an actuator 153 for adjusting the installation angle of the mirror 152. The actuator 153 has a rotation axis parallel to the Z direction. The actuator 153 rotates the mirror 152 in the Z-axis direction under the control of the control device 107. [

The second irradiation position adjusting device 154 is provided with a mirror 155 and an actuator 156 for adjusting the installation angle of the mirror 155. The actuator 156 has a rotation axis parallel to the Y direction. The actuator 156 rotates the mirror 155 in the Y axis direction under the control of the control device 107. [

On the optical path between the scanner 105 and the table 101 is disposed a second condenser lens 108 for condensing the laser light passed through the scanner 105 toward the holding surface 101s.

For example, as the second condenser lens 108, an f? Lens is used. Thus, laser light emitted parallel to the second condenser lens 108 from the mirror 155 can be condensed parallel to the object 110. [

Alternatively, the second converging lens 108 may not be disposed on the optical path between the scanner 105 and the table 101. [

The laser light L emitted from the laser oscillator 102 passes through the acousto-optical element 103, the IOR 104, the mirror 152, the mirror 155 and the second condenser lens 108, 101 to the object 110 held thereon. The first irradiating position adjusting device 151 and the second irradiating position adjusting device 154 are arranged to irradiate the object 110 held on the table 101 from the laser oscillator 102 under the control of the control device 107, The irradiation position of the laser beam to be irradiated is adjusted.

The machining area 105s (hereinafter referred to as a scan area) of the laser beam under the control of the scanner 105 is rectangular when viewed from the normal direction of the holding surface 101s. In the present embodiment, the area of the scan area 105s is smaller than the area of each of the first holding surface 101s1 and the second holding surface 101s2.

The mobile device 106 moves the table 101 and the scanner 105 relative to each other. The moving device 106 includes a first slider mechanism 161 for moving the table 101 in a first direction (X direction) parallel to the holding surface 101s and a second slider mechanism 161 for holding the first slider mechanism 161 And a second slider mechanism 162 that moves in a second direction (Y direction) parallel to the surface 101s and perpendicular to the first direction. The moving device 106 moves the table 101 in the X and Y directions by actuating the linear motor in which the first slider mechanism 161 and the second slider mechanism 162 are respectively incorporated.

The linear motor that is pulse-driven in the slider mechanism can finely control the rotation angle of the output shaft by the pulse signal supplied to the linear motor. Therefore, the position of the table 101 supported by the slider mechanism in the XY directions can be controlled with high accuracy. The position control of the table 101 is not limited to the position control using a pulse motor but can be realized by feedback control using a servo motor or other arbitrary control method.

The control device 107 includes a laser control section 171 for controlling the laser oscillator 102 and the acousto-optical element 103 (drive driver 131), a scanner control section 172 for controlling the scanner 105, And a slider control unit 173 for controlling the mobile device 106.

Specifically, the laser control section 171 controls the ON / OFF of the laser oscillator 102, the output of the laser light emitted from the laser oscillator 102, the output of the laser light L emitted from the laser oscillator 102, The timing of passing through the driving circuit 103, and the driving of the driving driver 131 are controlled.

The scanner control unit 172 performs drive control of each of the actuator 153 of the first irradiation position adjusting device 151 and the actuator 156 of the second irradiation position adjusting device 154. [

The slider control unit 173 controls the operation of the linear motor in which the first slider mechanism 161 and the second slider mechanism 162 are incorporated.

Fig. 5 is a diagram showing a configuration of the control system of the laser irradiation apparatus 100. Fig.

As shown in Fig. 5, an input device 109 capable of inputting an input signal is connected to the control device 107. Fig. The input device 109 has input devices such as a keyboard and a mouse, or a communication device capable of inputting data from an external device. The control device 107 may include a display device such as a liquid crystal display or the like that indicates the operation status of each part of the laser irradiation device 100 or may be connected to the display device.

When the user completes the initial setting by inputting the machining data to the input device 109, laser light is emitted from the laser oscillator 102 under the control of the laser control section 171 of the control device 107 . At this time, based on the control of the scanner control unit 172 of the control device 107, the rotation driving of the mirror constituting the scanner 105 is started. At the same time, based on the control of the slider control unit 173 of the control device 107, the rotation speed of the drive shaft of the motor or the like provided to the first slider mechanism 161 and the second slider mechanism 162 is applied to a sensor such as a rotary encoder .

The control device 107 corrects each coordinate value in real time so that laser light is emitted at the coordinates coinciding with the machining data, that is, laser light is projected on the object 110 (see Fig. 1) And controls the mobile device 106 and the scanner 105. The control device 107 performs scanning of the laser beam mainly by the moving device 106 and adjusts the area where the irradiation position of the laser beam can not be controlled with high precision by the moving device 106 with the scanner 105 .

6 (a) to 6 (d) are diagrams for explaining the operation of the EBS 130.

6 (a) shows a control signal of the laser beam emitted from the laser oscillator 102. In FIG.

6B shows the output characteristics of the laser beam directly emitted from the laser oscillator 102, that is, the output characteristics of the laser beam before the laser beam emitted from the laser oscillator 102 passes through the acousto- .

6 (c) shows a control signal of the acousto-optic device 103. As shown in Fig.

6D shows the output characteristics of the laser beam after the laser beam emitted from the laser oscillator 102 has passed through the acoustooptic element 103. FIG.

6 (b) and 6 (d), the horizontal axis represents time, and the vertical axis represents the intensity of laser light.

Figs. 7 (a) to 7 (d) are diagrams focused on one pulse of the laser light in Figs. 6 (a) to 6 (d).

In the following description, the "control signal of the laser beam emitted from the laser oscillator 102" is referred to as "control signal of the laser beam". The laser light output characteristic before the laser light emitted from the laser oscillator 102 passes through the acoustooptic element 103 is referred to as the output characteristic of the laser light before passing through the acoustooptic element 103. [ Output characteristic of the laser light after the laser light emitted from the laser oscillator 102 passes through the acoustooptic element 103 is referred to as " output characteristic of the laser light after passing through the acoustooptic element 103 ".

As shown in Figs. 6 (a) and 7 (a), the pulse Ps1 of the laser light control signal is a rectangular pulse. 6A, the control signal of the laser beam is a so-called clock pulse which generates a plurality of pulses Ps1 by cyclically switching the ON / OFF signal to the laser oscillator 102. As shown in Fig.

6A and 7A, the high part of the pulse Ps1 is a state in which the ON signal is sent to the laser oscillator 102, that is, the ON state in which the laser oscillator 102 emits laser light State. The valley portion of the pulse Ps1 is an OFF state in which the OFF signal is sent to the laser oscillator 102, that is, the laser oscillator 102 does not emit laser light.

As shown in Fig. 6 (a), three pulses Ps1 are arranged at short intervals to form one set pulse PL1. The three set pulses PL1 are arranged at longer intervals than the arrangement interval of the three pulses Ps1. For example, the interval between two adjacent pulses Ps1 is 1 millisecond, and the interval between two adjacent collective pulses PL1 is 10 milliseconds.

In the present embodiment, an example is described in which one set pulse PL1 is formed by arranging three pulses Ps1 at short intervals, but the present invention is not limited to this. For example, one set pulse may be formed by arranging two or more than two pulses at a short interval.

Furthermore, the present invention is not limited to a configuration in which a plurality of pulses are periodically formed, and one pulse may be formed to have a long width. That is, a laser beam having a constant intensity from an ON signal to an OFF signal with respect to the laser oscillator may be emitted for a predetermined period of time.

The pulse Ps2 of the output characteristic of the laser light before passing through the acoustooptic element 103 has the rising portion G1 and the falling portion G2 as shown in Figs. 6 (b) and 7 (b) It is a waveform pulse.

Here, the rising portion G1 means a portion in the period from the pulse Ps2 until the intensity of the laser light reaches the intensity which contributes to the cutting of the object from zero. The falling portion G2 means a portion of the pulse Ps2 of the laser light output characteristic in the period from the intensity of the laser light contributing to the cutting of the object to zero. The strength contributing to the cutting of the object differs depending on the material and thickness of the object and the output value of the laser light. For example, as shown in Fig. 7B, the intensity of 50% of the peak intensity (100% .

The width of the rising portion G1 of the pulse Ps2 is longer than the width of the falling portion G2 as shown in Figures 6 (b) and 7 (b). That is, the time of the rising portion G1 of the laser light emitted from the laser oscillator 102 is longer than the time of the falling portion G2 of the laser light.

For example, the width of the rising portion G1 is 45 microseconds, and the width of the falling portion G2 is 25 microseconds.

In the present embodiment, the width of the rising portion G1 of the pulse Ps2 is longer than the width of the falling portion G2. However, the present invention is not limited to this. For example, when the width of the rising portion G1 of the pulse Ps2 is substantially equal to the width of the falling portion G2, the width of the rising portion G1 of the pulse Ps2 is larger than the width of the falling portion G2 The present invention is also applicable to a short case.

As shown in Fig. 6B, one set pulse PL2 is formed by arranging the three pulses Ps2 at positions corresponding to the three pulses Ps1 shown in Fig. 6A . The three set pulses PL2 are arranged at positions corresponding to the three set pulses PL1 shown in Fig. 6A.

As shown in Figs. 6C and 7C, the pulse Ps3 of the control signal of the acoustooptic element 103 is a rectangular pulse. 6 (c), the control signal for the acousto-optical element 103 is a control signal for the drive driver 131 so that the timing at which the laser light passes through the acousto- Is a so-called clock pulse which is switched periodically to generate a plurality of pulses Ps3.

6 (c) and 7 (c), the high portion of the pulse Ps3 is a state of passing laser light, that is, a light-transmitting state of transmitting laser light. The valley portion of the pulse Ps3 is a state in which the laser light is not passed, that is, a light shielding state for shielding the laser light.

The valley portion of each pulse Ps3 is overlapped on both the rising portion G1 and the falling portion G2 of each pulse Ps2 shown in Fig. 6 (b), as shown in Fig. 6 (c) Respectively.

7C, when one pulse Ps3 is taken into consideration, the width of the front side valley portion V1 of the pulse Ps3 is larger than the width of the rising portion G1 of the pulse Ps2 , And the width of the rear valley portion V2 of the pulse Ps3 is substantially equal to the width of the falling portion of the pulse Ps2. For example, the width of the front side valley portion V1 of the pulse Ps3 is 45 microseconds, and the width of the rear side valley portion V2 of the pulse Ps3 is 25 microseconds. Thus, the EBS 130 has a switch function with a quick response characteristic.

Thereby, the rising portion G1 and the falling portion G2 of the laser light can be removed, and the portion of the pulse Ps2 of the laser light output characteristic that contributes to the cutting of the object can be selectively taken out.

As a result, as shown in Fig. 6 (d) and Fig. 7 (d), the pulse Ps4 of the output characteristic of the laser beam after passing through the acoustooptic element 103 is shifted from the rising portion G1 to the falling portion G2 ), Which is a sharp projected pulse.

In the present embodiment, the width of the front valley portion V1 of the pulse Ps3 is larger than the width of the rising portion G1 of the pulse Ps2, and the width of the valley portion V2 of the rear side of the pulse Ps3, The width of the falling portion of the pulse Ps2 is substantially equal to the width of the falling portion of the pulse Ps2. However, the present invention is not limited to this.

For example, the width of the front side valley portion V1 of the pulse Ps3 is made substantially equal to the width of the rising portion G1 of the pulse Ps2, or the width of the rear side valley portion V2 of the pulse Ps3 It is possible to appropriately adjust the width as required, for example, to make the width larger than the width of the falling portion of the pulse Ps2.

Fig. 8 is a diagram for explaining the operation of the IOR 104. Fig.

The drawing at the left end of Fig. 8 is a diagram showing a laser light intensity distribution before passing through the pinhole 143h. 8 is a plan view of the upper left end. 8 is a perspective view. The lower left end of Fig. 8 is a view showing the abscissa as the position and the ordinate as the strength.

8 is a diagram showing a laser light intensity distribution after passing through the pinhole 143h. 8 is a plan view. 8 is a perspective view. 8 is a diagram showing the horizontal axis as a position and the vertical axis as a strength.

Fig. 9 is an enlarged view of a cut surface when a polarizing plate as an object is cut, using a laser light irradiation apparatus according to a comparative example. Fig.

Here, the laser light irradiating apparatus according to the comparative example is a laser light irradiating apparatus which does not include the laser light irradiating apparatus, that is, the IOR 104 using the laser light as it is before passing through the pinhole 143h.

10 is an enlarged view of a cut surface when the polarizing plate as an object is cut by using the laser light irradiation apparatus 100 according to the present embodiment.

As shown in the left end of Fig. 8, the laser light intensity distribution before passing through the pinhole 143h has a strong intensity at the center of the beam and an intensity distribution with a weak intensity at the outer periphery of the beam. When the intensity of the laser beam at the outer peripheral portion of the beam becomes small, the outer peripheral portion of the beam does not contribute to the cutting of the object.

In this case, as shown in Fig. 9, it is confirmed that the cut surface of the polarizing plate is tapered in the laser light irradiation apparatus according to the comparative example. This is considered to be caused by dissolution of a portion other than the cut region of the polarizing plate by imparting thermal influence to the portion of the outer peripheral portion of the beam diameter of the laser beam along the cut line when the polarizing plate is cut.

8, the intensity distribution of the laser beam after passing through the pinhole 143h is such that the portion of the hem that does not contribute to the cutting of the polarizing plate among the intensity distribution of the laser beam is removed, The intensity distribution of the laser light becomes an ideal Gaussian distribution. The half value width of the intensity distribution of the laser light after passing through the pinhole 143h is narrower than the half value width of the intensity distribution of the laser light before passing through the pinhole 143h.

In this case, as shown in Fig. 10, it is confirmed that the cut surface of the polarizing plate is perpendicular to the holding surface in the laser light irradiation apparatus 100 provided with the IOR 104 according to the present embodiment. It is considered that this is because the polarizing plate is irradiated with the portion contributing to the cutting of the polarizing plate among the intensity distribution of the laser beam when the polarizing plate is cut, thereby selectively melting the cut region of the polarizing plate.

As described above, according to the laser light irradiating apparatus 100 according to the present embodiment, the object 110 can be cut sharply, and deterioration of the cut quality can be suppressed.

Generally, the laser light has a longer optical path when it is intended to increase the cutting range. If so, the beam diameter of the laser beam is changed, whereby the outer peripheral portion of the beam diameter is distorted, and the cut quality is changed.

On the other hand, according to the laser irradiation apparatus 100 according to the present embodiment, the laser light incident by the first condenser lens 141 is condensed, and the beam diameter of the laser light condensed by the pinhole 143h The outer peripheral portion is removed, and the laser light from which the outer peripheral portion of the beam diameter is removed can be collimated by the collimator lens 145. Therefore, even if the optical path of the laser beam is long, the cut quality can be maintained.

Further, since the diaphragm member 143 is disposed in the vicinity of the rear focal point of the first condenser lens 141, the laser light passes through the pinhole 143h in a sufficiently condensed state. Therefore, the portion of the skirt which does not contribute to the cutting of the object 110 in the intensity distribution of the laser light can be removed with high accuracy.

Since the second condenser lens 108 is disposed on the optical path between the scanner 105 and the table 101, the laser light passed through the scanner 105 can be condensed parallel to the object 110. [ Therefore, the object 110 can be cut with high accuracy.

In the laser irradiation apparatus 100 according to the present embodiment, the scanning of the laser beam is mainly performed by the moving apparatus 106, and the area where the irradiation position of the laser beam can not be controlled with high precision by the moving apparatus 106 is referred to as a scanner 105). This makes it possible to control the irradiating position of the laser beam in a wide range with high accuracy compared with the case where only the moving device 106 or the scanner 105 scans the laser beam.

In this embodiment, as an example, the laser irradiation apparatus 100 includes a table 101, a laser oscillator 102, a first condenser lens 141, a diaphragm member 143, The scanner 105, and the mobile device 106. However, the present invention is not limited to this. For example, the laser light irradiation apparatus may include a laser oscillator, a condenser lens, a diaphragm member, and a collimator lens. That is, the laser light irradiating device may be configured not to include a table, a scanner, and a moving device.

(Manufacturing Apparatus for Optical Member Assembly)

Hereinafter, a film joining system 1 which is an apparatus for manufacturing an optical member joined body according to an embodiment of the present invention will be described with reference to the drawings. In the film bonding system 1 according to the present embodiment, the cutting apparatus is constituted by the above-described laser light irradiating apparatus 100. [

Fig. 11 is a diagram showing a schematic configuration of the film bonding system 1 of the present embodiment.

The film joining system 1 joins a film-shaped optical member such as a polarizing film, an antireflection film, or a light diffusion film to a panel-shaped optical display component such as a liquid crystal panel or an organic EL panel.

In the following description, the XYZ orthogonal coordinate system is set as necessary, and the positional relationship of the respective members is described with reference to the XYZ orthogonal coordinate system. In the present embodiment, the direction in which the liquid crystal panel serving as an optical display component is arranged is the X direction, and the direction orthogonal to the X direction (the width direction of the liquid crystal panel) in the plane of the liquid crystal panel is defined as Y direction, Direction is a Z-direction.

As shown in Fig. 11, the film bonding system 1 of the present embodiment is provided as one step of a production line of the liquid crystal panel P. Fig. The respective parts of the film bonding system 1 are collectively controlled by the control unit 40 as an electronic control unit.

12 is a plan view of the liquid crystal panel P viewed from the thickness direction of the liquid crystal layer P3 of the liquid crystal panel P. Fig. The liquid crystal panel P includes a first substrate P1 having a rectangular shape in a plan view, a second substrate P2 having a relatively small rectangular shape disposed to face the first substrate P1, And a liquid crystal layer P3 sealed between the first substrate P1 and the second substrate P2. The liquid crystal panel P has a rectangular shape conforming to the outer shape of the first substrate P1 when seen from a plane and has a region accommodated inside the outer periphery of the liquid crystal layer P3 as viewed in a plane as a display region P4 do.

13 is a cross-sectional view along the line A-A in Fig. The front and rear surfaces of the liquid crystal panel P are respectively cut from a long strip-shaped first optical sheet F1 and a second optical sheet F2 (see FIG. 11, hereinafter collectively referred to as an optical sheet FX) The first optical member F11 and the second optical member F12 (hereinafter sometimes collectively referred to as the optical member F1X) are appropriately bonded. In this embodiment, polarizing films are bonded to both surfaces of the liquid crystal panel P, respectively. On the backlight side surface of the liquid crystal panel P, a first optical member F11 is bonded as a polarizing film. On the display surface side of the liquid crystal panel P, a second optical member F12 is bonded as a polarizing film.

Outside the display region P4 is provided a frame portion G having a predetermined width for disposing a sealant for bonding the first substrate P1 and the second substrate P2 of the liquid crystal panel P. [

The first optical member F11 and the second optical member F12 may be collectively referred to as a first sheet piece F1m and a second sheet piece F2m ), The outer surplus portion of the joint surface is jointed. The bonding surfaces will be described later.

Fig. 14 is a partial cross-sectional view of the optical sheet FX bonded to the liquid crystal panel P. Fig. The optical sheet FX has an optical member main body F1a in the form of a film, an adhesive layer F2a provided on one side (upper side in Fig. 14) of the optical member main body F1a, A separator F3a detachably laminated on one surface of the member main body F1a and a surface protective film F4a laminated on the other surface of the optical member main body F1a (the surface in FIG. 14). The optical member main body F1a functions as a polarizing plate and is bonded over the entire area of the display area P4 of the liquid crystal panel P and the peripheral area of the display area P4. Incidentally, hatching of each layer in Fig. 14 is omitted for convenience of illustration.

The optical member main body F1a is bonded to the liquid crystal panel P via the adhesive layer F2a in a state in which the separator F3a is separated while leaving the adhesive layer F2a on one side of the optical member main body F1a do. Hereinafter, a portion of the optical sheet FX excluding the separator F3a is referred to as a bonded sheet F5.

The separator F3a protects the adhesive layer F2a and the optical member main body F1a until the separator F3a is separated from the adhesive layer F2a. The surface protective film F4a is bonded to the liquid crystal panel P together with the optical member main body F1a. The surface protection film F4a is disposed on the side opposite to the liquid crystal panel P with respect to the optical member main body F1a to protect the optical member main body F1a. The surface protective film F4a is separated from the optical member main body F1a at a predetermined timing. Further, the optical sheet FX may not include the surface protective film F4a. The surface protective film F4a may not be separated from the optical member main body F1a.

The optical member main body F1a includes a sheet polarizer F6 and a first film F7 bonded to one side of the polarizer F6 with an adhesive or the like and an adhesive agent or the like on the other side of the polarizer F6 And a second film (F8) bonded thereto. The first film F7 and the second film F8 are, for example, protective films for protecting the polarizer F6.

The optical member main body F1a may be a single-layer structure including one optical layer, or a laminated structure in which a plurality of optical layers are laminated to each other. The optical layer may be a retardation film, a brightness enhancement film, or the like in addition to the polarizer F6. At least one of the first film (F7) and the second film (F8) is subjected to a surface treatment capable of obtaining effects such as hard coating treatment for protecting the outermost surface of the liquid crystal display element and antiglare treatment including anti glare treatment . The optical member main body F1a may not include at least one of the first film F7 and the second film F8. For example, when the first film F7 is omitted, the separator F3a may be bonded to one surface of the optical member main body F1a through the adhesive layer F2a.

Next, the film bonding system 1 of the present embodiment will be described in detail.

11, the film joining system 1 of the present embodiment is provided with the liquid crystal panel P on the left side in the drawing from the upstream side (+ X direction side) of the liquid crystal panel P on the right side in the drawing, And a drive roller conveyor 5 that reaches the downstream side (-X direction side) in the conveying direction of the liquid crystal panel P and conveys the liquid crystal panel P in a horizontal state.

The roller conveyor 5 is divided into an upstream conveyor 6 and a downstream conveyor 7 with a boundary of a reversing device 15 to be described later. In the upstream-side conveyor 6, the liquid crystal panel P is conveyed so that the short sides of the display region P4 are along the conveying direction. On the other hand, in the downstream conveyor 7, the liquid crystal panel P is conveyed such that the long sides of the display region P4 are along the conveying direction. The sheet piece FXm (corresponding to the optical member F1X) of the bonded sheet F5 cut to a predetermined length is bonded to the front and back surfaces of the liquid crystal panel P by strip-shaped optical sheets FX.

The upstream-side conveyor 6 is provided with an independent free roller conveyor 24 on the downstream side in the first adsorption device 11 to be described later. On the other hand, the downstream conveyor 7 is provided with a free roller conveyor 24 that is independent on the downstream side in the second adsorption device 20 described later.

The film bonding system 1 of the present embodiment is provided with the first adsorption device 11, the first dust collector 12, the first bonding device 13, the first detection device 41, the first cutting device 31 A second detection device 42, a second cutting device 32, and a control unit 40. The control unit 40 controls the operation of the first bonding apparatus 17, the second bonding apparatus 17, the second bonding apparatus 17,

The first adsorption device 11 sucks the liquid crystal panel P and conveys the liquid crystal panel P to the upstream conveyor 6 and performs alignment of the liquid crystal panel P. [ The first adsorption device 11 has a panel holding portion 11a, an alignment camera 11b and a rail R. [

The panel holding portion 11a holds the liquid crystal panel P which is brought into contact with the stopper S on the downstream side by the upstream conveyor 6 so as to be movable in the vertical direction and the horizontal direction, Alignment is performed. The panel holding portion 11a sucks and holds the upper surface of the liquid crystal panel P which has come into contact with the stopper S by vacuum suction. The panel holding portion 11a moves on the rail R in a state in which the liquid crystal panel P is held by suction so as to convey the liquid crystal panel P. [ When the conveying is completed, the panel holding portion 11a releases the suction holding and transfers the liquid crystal panel P to the free roller conveyor 24.

The alignment camera 11b holds the liquid crystal panel P in contact with the stopper S and holds the alignment mark and the tip shape of the liquid crystal panel P in a state in which the panel holding portion 11a is lifted. The image pickup data by the alignment camera 11b is transmitted to the control section 40 and the panel holding section 11a is operated based on the image pickup data to move the liquid crystal panel P to the destination free roller conveyor 24, Alignment is performed. That is, the liquid crystal panel P is moved to the free roller conveyor 24 in a state in which deviations in the conveying direction with respect to the free roller conveyor 24, in the direction perpendicular to the conveying direction, and in the turning direction around the vertical axis of the liquid crystal panel P 24.

The liquid crystal panel P conveyed along the rail R by the panel holding portion 11a is sandwiched by the clamping roll 23 with the sheet piece FXm in a state of being attracted to the adsorption pad 26 .

The first dust collecting device 12 is provided on the conveying upstream side of the liquid crystal panel P of the tightly packed roll 23 which is the bonding position of the first joining device 13. The first dust collector 12 performs static elimination and dust collection in order to remove the dust around the liquid crystal panel P, particularly the dust on the lower surface side, before it is introduced to the bonding position.

The first joining device 13 is provided on the downstream side of the panel conveying than the first adsorption device 11. The first joining apparatus 13 joins the joining sheet F5 (corresponding to the first sheet member F1m) cut to a predetermined size to the lower surface of the liquid crystal panel P introduced to the joining position.

The first joining apparatus 13 is provided with a conveying device 22 and a tightening roll 23.

The transport apparatus 22 transports the optical sheet FX along the longitudinal direction of the optical sheet FX while drawing the optical sheet FX from the original roll R1 wound with the optical sheet FX. The transport apparatus 22 carries the bonded sheet F5 using the separator F3a as a carrier. The conveying device 22 has a roll holding portion 22a, a plurality of guide rollers 22b, a cutting device 22c, a knife edge 22d and a winding portion 22e.

The roll holding portion 22a holds the far-end roll R1 wound with the strip-shaped optical sheet FX and guides the optical sheet FX along the longitudinal direction of the optical sheet FX.

The plurality of guide rollers 22b wind the optical sheet FX to guide the optical sheet FX released from the far-end roll R1 along a predetermined transport path.

The cutting device 22c applies a half cut to the optical sheet FX on the conveying path.

The knife edge 22d starts to wind the half-cut optical sheet FX at an acute angle and feeds the bonded sheet F5 to the bonding position while separating the bonded sheet F5 from the separator F3a.

The winding section 22e holds a separator roll R2 for winding the separator F3a which has been made singly via the knife edge 22d.

The roll holding portion 22a located at the beginning of the transport apparatus 22 and the winding unit 22e located at the end of the transport apparatus 22 are driven in synchronization with each other, for example. Thus, while the roll holding portion 22a feeds the optical sheet FX in the transport direction of the optical sheet FX, the winding portion 22e winds the separator F3a through the knife edge 22d. Hereinafter, the upstream side of the optical sheet FX (separator F3a) in the conveying device 22 in the conveying direction is referred to as the sheet conveying upstream side, and the conveying direction downstream side is referred to as the sheet conveying downstream side.

Each guide roller 22b changes the advancing direction of the optical sheet FX during conveyance along the conveying path and at least a part of the plurality of guide rollers 22b adjusts the tension of the optical sheet FX during conveyance .

A dancer roller (not shown) may be disposed between the roll holding portion 22a and the cutting device 22c. The dancer roller absorbs the amount of projection of the optical sheet FX conveyed from the roll holding portion 22a while the optical sheet FX is cut at the cutting device 22c.

Fig. 15 is a diagram showing the operation of the cutting apparatus 22c of the present embodiment.

As shown in Fig. 15, the cutting device 22c is configured to cut the optical sheet FX (see Fig. 15) over the entire width in the width direction orthogonal to the longitudinal direction of the optical sheet FX, In the thickness direction is cut. The cutting device 22c of the present embodiment is provided so as to be capable of advancing and retracting from the side opposite to the separator F3a with respect to the optical sheet FX toward the optical sheet FX.

The cutting device 22c is arranged so that the optical sheet FX (the separator F3a) is not broken (the predetermined thickness remains in the separator F3a) by the tension acting during the conveyance of the optical sheet FX, And half cut to the vicinity of the interface between the adhesive layer F2a and the separator F3a is carried out. Further, a laser device in place of the cutting edge may be used.

The optical member FX and the surface protective film F4a are cut in the thickness direction of the optical sheet FX after the half cut so that the cut- (L1), and a cutting line (L2) are formed. The cutting line L1 and the cutting line L2 are formed so as to be plurally arranged in the longitudinal direction of the strip-shaped optical sheet FX. For example, in the case of a joining step of conveying liquid crystal panels P of the same size, a plurality of cut-out lines L1 and a plurality of cut-out lines L2 are formed at equal intervals in the longitudinal direction of the optical sheet FX. The optical sheet FX is divided into a plurality of sections in the longitudinal direction by a plurality of cut-out lines L1 and a plurality of cut-out lines L2. The sections sandwiching the pair of cut lines L1 and the cut line L2 adjacent to each other in the longitudinal direction of the optical sheet FX become one sheet piece FXm in the bonded sheet F5. The sheet piece FXm is a sheet piece of the optical sheet FX having a size that is projected outward of the liquid crystal panel P. [

Returning to Fig. 11, the knife edge 22d is disposed below the upstream conveyor 6 and extends at least over the entire width of the optical sheet FX in the width direction of the optical sheet FX. The knife edge 22d winds the optical sheet FX so as to slide on the side of the separator F3a of the optical sheet FX after the half cut.

The knife edge 22d has a first surface disposed in a lying position when viewed in the width direction of the optical sheet FX (the width direction of the upstream conveyor 6) A second surface disposed at an acute angle with respect to the first surface, and a leading end where the first surface and the second surface intersect.

In the first joining apparatus 13, the knife edge 22d winds the first optical sheet F1 at an acute angle to the tip end of the knife edge 22d. The first sheet piece F1m of the bonded sheet F5 is separated from the separator F3a when the first optical sheet F1 is folded at an acute angle at the front end of the knife edge 22d. The leading end portion of the knife edge 22d is disposed close to the downstream side of the panel conveyance of the tightly packed roll 23. The first sheet flake F1m separated from the separator F3a by the knife edge 22d overlaps the lower surface of the liquid crystal panel P in a state of being adsorbed by the first adsorption device 11, The pair of joining rollers 23a. The first sheet piece F1m is a sheet piece of the first optical sheet F1 of a size which is projected outward to the outside of the liquid crystal panel P. [

On the other hand, the separator F3a separated from the bonding sheet F5 by the knife edge 22d faces the winding section 22e. The winding portion 22e winds the separator F3a separated from the bonded sheet F5 and collects the recovered sheet.

The clamping roll 23 is configured such that the first sheet piece F1m separated from the first optical sheet F1 by the conveying device 22 is joined to the lower surface of the liquid crystal panel P conveyed by the upstream conveyor 6 do. Here, the tightening roll 23 corresponds to a joining apparatus.

The tightening rolls 23 have a pair of joining rollers 23a arranged in parallel with each other in the axial direction. The upper joining roller of the pair of joining rollers 23a is movable up and down. A predetermined clearance is formed between the pair of joining rollers 23a. This gap serves as a bonding position of the first bonding apparatus 13.

In the clearance, the liquid crystal panel P and the first sheet piece F1m are overlapped and introduced. The liquid crystal panel P and the first sheet piece F1m are fed to the downstream side of the panel conveyance of the upstream conveyor 6 while being clamped by the pair of joining rollers 23a. In the present embodiment, the first sheet member F1m is joined to the backlight side surface of the liquid crystal panel P by the tightening roll 23, whereby the first optical member joined body PA1 is formed.

The first detecting device 41 is provided downstream of the first joining apparatus 13 on the panel conveying side. The first detecting device 41 detects an end edge of a joining surface of the liquid crystal panel P and the first sheet piece F1m (hereinafter referred to as a first joining surface SA1).

16 is a plan view showing the step of detecting the edge ED of the first joint surface SA1.

16, the first detection device 41 detects the position of the end of the first joint surface SA1 in the four inspection areas CA provided on the conveyance path of the upstream conveyor 6, for example, And detects the frame ED. Each inspection area CA is disposed at a position corresponding to the four corner portions of the first joint surface SA1 having a rectangular shape. The end edge ED is detected for each liquid crystal panel P conveyed along the line. The data of the end frame ED detected by the first detecting device 41 is stored in a storage unit (not shown).

The arrangement position of the inspection area CA is not limited to this. For example, each inspection area CA may be disposed at a position corresponding to a part of each side of the first abutment surface SA1 (for example, a central portion of each side).

Fig. 17 is a schematic diagram of the first detection device 41. Fig.

In Fig. 17, for convenience, the side where the first sheet member F1m of the first optical member joined body PA1 is joined is referred to as the upper side, and the structure of the first detecting device 41 is shown inverted.

17, the first detecting device 41 includes an illumination light source 44 for illuminating an end edge ED, and an illumination light source 44 for illuminating the end edge ED with respect to the normal direction of the first abutment surface SA1 An image pickup device (1) for picking up an image of an end edge (ED) from the side where the first sheet piece (F1m) of the first optical member joined body (PA1) is joined is disposed at an inclined position inside the first abutment surface (SA1) (43).

The illumination light source 44 and the image pickup device 43 are arranged at four inspection regions CA (positions corresponding to the four corner portions of the first joint surface SA1) shown in Fig. 16, respectively.

The angle? Between the normal of the first abutment surface SA1 and the normal of the imaging surface 43a of the image pickup device 43 (hereinafter referred to as the tilt angle? Of the image pickup device 43) 43 can be set so as not to be shifted or burred at the time of panel separation within the visual field of view of the panel. For example, when the end face of the second substrate P2 is outwardly shifted from the end face of the first substrate P1, the inclination angle [theta] of the image pickup device 43 is set so that the image pickup of the image pickup device 43 So that the edge of the second substrate P2 is not drawn in the field of view.

The inclination angle? Of the image pickup device 43 is a distance H between the first abutment surface SA1 and the center of the image pickup surface 43a of the image pickup device 43 H) "). For example, when the height H of the image pickup device 43 is not less than 50 mm and not more than 100 mm, the tilt angle? Of the image pickup device 43 can be set to an angle within a range of 5 ° to 20 °. However, if the shift amount is known empirically, the height H of the image pickup device 43 and the tilt angle? Of the image pickup device 43 can be obtained based on the shift amount. In this embodiment, the height H of the image pickup device 43 is 78 mm and the inclination angle? Of the image pickup device 43 is set to 10 degrees.

The illumination light source 44 and the image pickup device 43 are fixed to the respective inspection areas CA.

The illumination light source 44 and the image pickup device 43 may be arranged so as to be movable along the end edge ED of the first abutment surface SA1. In this case, one illumination light source 44 and one imaging device 43 may be provided. Thereby, the illumination light source 44 and the image pickup device 43 can be moved to a position where the end edge ED of the first abutment surface SA1 can be easily picked up.

The illumination light source 44 is arranged on the side opposite to the side where the first sheet piece F1m of the first optical member joined body PA1 is joined. The illumination light source 44 is arranged at an inclined position outside the first abutment surface SA1 with respect to the normal direction of the first abutment surface SA1 with respect to the end edge ED. In this embodiment, the optical axis of the illumination light source 44 and the normal line of the imaging surface 43a of the imaging device 43 are parallel.

Further, the illumination light source may be arranged on the side where the first sheet piece F1m of the first optical member joined body PA1 is joined.

The normal line of the image pickup surface 43a of the image pickup device 43 and the optical axis of the illumination light source 44 may cross slightly at an angle.

The cut position of the first sheet piece F1m is adjusted based on the detection result of the end edge ED of the first contact surface SA1. The control unit 40 (see Fig. 11) acquires the data of the end edge ED of the first joint surface SA1 stored in the storage unit, and the first optical member F11 is located outside the liquid crystal panel P (Outside of the first abutting surface SA1) of the first sheet piece F1m. The first cutting device 31 cuts the first sheet piece F1m at the cut position determined by the control unit 40. [

Returning to Fig. 11, the first cutting device 31 is provided downstream of the first detecting device 41 on the downstream side of the panel transportation. The first cutting device 31 cuts the laser beam along the end edge ED so that the first cut surface of the portion exposed outward from the first joining surface SA1 from the first optical member joined body PA1, (The first optical member F11) having a size corresponding to the first joining face SA1 is formed by joining the first sheet member F1m (the excess portion of the first sheet member F1m). The first cutting device 31 corresponds to a cutting device.

Here, the " size corresponding to the first bonding surface SA1 " indicates the size of the outer shape of the first substrate P1. However, it includes an area excluding the functional parts such as the electric component mounting part in the area equal to or larger than the size of the display area P4 and the size of the external shape of the liquid crystal panel P or the like.

An excess portion of the first sheet piece F1m is joined from the first optical member joined body PA1 by the first cutting device 31 so that the first optical member F11 is formed on the backlight side surface of the liquid crystal panel P The second optical member joined body PA2 is formed. The surplus portion jammed from the first sheet piece F1m is peeled off from the liquid crystal panel P by a peeling apparatus not shown and recovered.

The reversing device 15 reverses the second optical member joined body PA2 with the display surface side of the liquid crystal panel P as the upper surface so that the backlight side of the liquid crystal panel P is the upper surface, Alignment of the liquid crystal panel P with respect to the liquid crystal panel 17 is performed.

The reversing device (15) has an alignment function similar to that of the panel holding portion (11a) of the first adsorption device (11). The reversing device 15 is provided with an alignment camera 15c similar to the alignment camera 11b of the first adsorption device 11. [

The reversing device 15 detects the position of the second optical member joined body PA2 with respect to the second joining apparatus 17 based on the inspection data in the optical axis direction and the image pickup data of the alignment camera 15c stored in the control unit 40, In the component width direction and in the rotational direction. In this state, the second optical member joined body PA2 is introduced to the joining position of the second joining apparatus 17.

Since the second adsorption device 20 has the same configuration as the first adsorption device 11, the same parts are denoted by the same reference numerals. The second adsorption apparatus 20 adsorbs the second optical member conjugate body PA2 and conveys the second optical member conjugate body PA2 to the downstream conveyor 7 and aligns (positions) the second optical member conjugate body PA2. The second adsorption device 20 has a panel holding portion 11a, an alignment camera 11b, and a rail R. [

The panel holding portion 11a holds the second optical member joined body PA2 which is in contact with the downstream side stopper S by the downstream side conveyor 7 so as to be movable in the vertical direction and the horizontal direction, 2 alignment of the optical member joined body PA2 is performed. The panel holding portion 11a sucks and holds the upper surface of the second optical member joined body PA2 in contact with the stopper S by vacuum suction. The panel holding portion 11a moves on the rail R in a state of holding and holding the second optical member joined body PA2 to carry the second optical member joined body PA2. When the conveying is completed, the panel holding portion 11a releases the suction holding and transfers the second optical member joined body PA2 to the free roller conveyor 24.

The alignment camera 11b holds the second optical member joined body PA2 in contact with the stopper S with the panel holding portion 11a holding the alignment mark and the tip of the second optical member joined body PA2 in the raised state, Shape, and the like. The image pickup data by the alignment camera 11b is transmitted to the control unit 40. Based on the image pickup data, the panel holding unit 11a is operated so that the second optical member joined body (PA2) are aligned. That is, the second optical member joined body PA2 is provided with a deviation in the conveying direction with respect to the free roller conveyor 24, in the direction perpendicular to the conveying direction, and in the turning direction around the vertical axis of the second optical member joined body PA2 And is conveyed to the free roller conveyor 24 in the state of FIG.

The second dust collector 16 is disposed on the upstream side of the narrowing roll 23, which is the bonding position of the second joining apparatus 17, in the conveying direction of the liquid crystal panel P. The second dust collector 16 performs static elimination and dust collection in order to remove the dust around the second optical member joined body PA2, particularly the dust on the lower surface side, before it is introduced to the bonding position.

The second joining apparatus 17 is provided on the downstream side of the panel conveying than the second dust collecting apparatus 16. The second joining apparatus 17 is configured such that the joining sheet F5 (corresponding to the second sheet piece F2m) cut to a predetermined size is bonded to the lower surface of the second optical member joined body PA2 introduced into the joining position . The second joining apparatus 17 is provided with a conveying apparatus 22 and a tightening roll 23 similar to those of the first joining apparatus 13.

The second optical member joined body PA2 and the second sheet piece F2m are superposed on each other in the gap between the pair of joining rollers 23a of the tightening roll 23 (the joining position of the second joining device 17) . The second sheet piece F2m is a sheet piece of the second optical sheet F2 having a size larger than the display area P4 of the liquid crystal panel P. [

The second optical member joined body PA2 and the second sheet piece F2m are fed to the downstream side of the panel conveyance of the downstream conveyor 7 while being clamped by the pair of joining rollers 23a. In the present embodiment, the narrowing roll 23 is provided on the side of the display surface side of the liquid crystal panel P (the side opposite to the side where the first optical member F11 of the second optical member joined body PA2 is joined) And the sheet member F2m is bonded to form the third optical member joined body PA3.

The second detecting device 42 is provided on the downstream side of the panel conveying than the second joining device 17. The second detecting device 42 detects an end edge of a junction surface between the liquid crystal panel P and the second sheet piece F2m (hereinafter referred to as a second junction surface). The data of the edge portion detected by the second detecting device 42 is stored in a storage unit (not shown).

The cut position of the second sheet piece F2m is adjusted based on the end edge detection result of the second joining face. The control unit 40 (see Fig. 11) acquires the end frame data of the second joint surface stored in the storage unit, and the second optical member F12 is located outside the liquid crystal panel P The cut position of the second sheet piece F2m is determined so that the second sheet piece F2m does not come out. The second cutting device 32 cuts the second sheet piece F2m at the cut position determined by the control unit 40. [

The second cutting device 32 is provided downstream of the second detecting device 42 on the downstream side of the panel conveyance. The second cutting device 32 cuts the laser beam along the edge of the second joining surface to form a second sheet piece (hereinafter referred to as " second joining face ") of the portion outwardly projected from the third joining face F2m (the excess portion of the second sheet member F2m) are jointed to form an optical member (second optical member F12) having a size corresponding to the second joining face.

An excess portion of the second sheet piece F2m is jointed from the third optical member joined body PA3 by the second cutting device 32 so that the second optical member F12 is provided on the display surface side surface of the liquid crystal panel P And the fourth optical member joined body PA4 (optical member joined body), which is formed by bonding the first optical member F11 to the backlight side surface of the liquid crystal panel P, is formed. The surplus portion jointed from the second sheet piece F2m is peeled off from the liquid crystal panel P by a peeling device not shown and recovered.

The first cutting device 31 and the second cutting device 32 are constituted by the laser irradiation device 100 described above. The first cutting device 31 and the second cutting device 32 cut the sheet piece FXm bonded to the liquid crystal panel P into an endless shape along the outer periphery of the bonding surface.

A bonding inspection device (not shown) is provided on the downstream side of the panel conveyance than the second bonding device 17. The bonding inspection apparatus checks whether or not the position of the optical member F1X is appropriate (whether or not the positional deviation is within the tolerance range), etc. by an inspection apparatus (not shown) of the work (liquid crystal panel P) Is carried out. The workpiece determined to have an inappropriate position of the optical member F1X with respect to the liquid crystal panel P is discharged to the outside of the system by a dispensing means, not shown.

In the present embodiment, the control unit 40 as an electronic control unit for collectively controlling each part of the film bonding system 1 includes a computer system. The computer system includes an arithmetic processing unit such as a CPU and a storage unit such as a memory or a hard disk.

The control unit 40 of the present embodiment includes an interface that enables communication with an external device of the computer system. The control unit 40 may be connected to an input device capable of inputting an input signal. The input device includes an input device such as a keyboard and a mouse, or a communication device capable of inputting data from an external device of the computer system. The control unit 40 may include a display device such as a liquid crystal display or the like which indicates the operation status of each part of the film bonding system 1, or may be connected to a display device.

In the storage unit of the control unit 40, an operating system (OS) for controlling the computer system is installed. The storage section of the control section 40 is provided with a program for executing processing for causing each section of the film joining system 1 to carry the optical sheet FX to each section of the film joining system 1 with high precision, Is recorded. The arithmetic processing unit of the control unit 40 can read various types of information including a program recorded in the storage unit. The control unit 40 may include a logic circuit such as an ASIC that performs various processes necessary for controlling each part of the film bonding system 1. [

The storage section includes a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), an external storage such as a hard disk, a CD-ROM reading device, a disk type storage medium, and the like. The storage unit is functionally equivalent to the first adsorption device 11, the first dust collector 12, the first joining device 13, the first detection device 41, the first cutting device 31, the reversing device 15 ) Describing the operation control procedure of the second adsorption device 20, the second dust collecting device 16, the second joining device 17, the second detecting device 42 and the second cutting device 32, And various other storage areas are set.

An example of a method of determining the joining position (relative joining position) of the sheet member FXm relative to the liquid crystal panel P will be described below with reference to Figs. 18A and 18B. Fig.

First, as shown in Fig. 18A, a plurality of inspection points CP are set in the width direction of the optical sheet FX, and the optical axis direction of the optical sheet FX is detected at each inspection point CP. The timing for detecting the optical axis may be the production of the far-end roll R1, or it may be between the time when the optical sheet FX is pulled out from the far-end roll R1 and half cut. Data in the optical axis direction of the optical sheet FX is stored in a storage device (not shown) in association with the position of the optical sheet FX (the position in the longitudinal direction and the position in the width direction of the optical sheet FX).

The control unit 40 acquires the optical axis data (inspection data on the distribution within the optical axis) of each inspection point CP from the storage device and obtains the optical sheet FX at the portion where the sheet piece FXm is cut (The region partitioned by the entrance line CL) of the optical axis direction.

For example, as shown in Fig. 18B, the angle (deviation angle) between the optical axis direction and the edge line EL of the optical sheet FX is detected for each inspection point CP, and the angle (= (? Max +? Min) / (? Max) of the maximum deviation angle? Max and the minimum deviation angle? Min when the minimum deviation angle (maximum deviation angle) 2) is detected as an average deviation angle. The direction of the average deviation angle? Mid with respect to the edge line EL of the optical sheet FX is detected as the average optical axis direction of the optical sheet FX. Incidentally, the shift angle is calculated by, for example, counterclockwise with respect to the edge line EL of the optical sheet FX and negative with respect to the clockwise direction.

The average optical axis direction of the optical sheet FX detected by the above method is applied to the liquid crystal panel P so as to form a desired angle with respect to the long side or the short side of the display region P4 of the liquid crystal panel P. [ The joining position (relative joining position) of the sheet member FXm is determined. For example, when the optical axis direction of the optical member F1X is set to 90 degrees with respect to the long side or the short side of the display region P4 according to the design specifications, the average of the optical sheets FX The sheet piece FXm is bonded to the liquid crystal panel P so that the optical axis direction becomes 90 占 with respect to the long side or the short side of the display region P4.

The first cutting device 31 and the second cutting device 32 described above detect the outer periphery of the display area P4 of the liquid crystal panel P with a detecting means such as a camera, The sheet member FXm is cut into an endless shape along the outer periphery of the joint surface. The outer periphery of the bonding surface is detected by picking up an edge of the bonding surface.

In the present embodiment, laser cutting is performed by the first cutting device 31 and the second cutting device 32 along the outer periphery of the bonding surface.

The swing width (tolerance) of the cutting line of the laser processing machine is smaller than that of the cutting edge. Therefore, in the present embodiment, compared with the case where the optical sheet FX is cut using the cutting edge, it is possible to easily cut along the outer periphery of the bonding surface, and the size and / or the size of the liquid crystal panel P The area P4 can be enlarged. This is effective for application to high-performance mobile devices, such as smart phones and tablet terminals of recent years, where the size of the housing is limited and the display screen is required to be enlarged.

When the optical sheet FX is joined to the liquid crystal panel P after being cut into sheet pieces that match the display area P4 of the liquid crystal panel P, And the dimensional tolerances of the sheet joining positions of the sheet piece and the liquid crystal panel P are overlapped, it is difficult to narrow the width of the frame portion G of the liquid crystal panel P (it is difficult to enlarge the display area).

On the other hand, a sheet piece FXm of an optical sheet FX of a size that is outwardly projected from the optical sheet FX to the outside of the liquid crystal panel P is cut out and the cut sheet piece FXm is bonded to the liquid crystal panel P. [ The tolerance of the width of the frame portion G can be reduced (± 0.1 mm or less). Also in this case, the width of the frame portion G of the liquid crystal panel P can be narrowed (the display area can be enlarged).

In addition, by cutting the sheet piece FXm with a laser, not a blade, the force at the time of cutting is not inputted to the liquid crystal panel P, and cracks or incisions are not easily generated at the edge of the end of the liquid crystal panel (P) The durability against the heat cycle and the like is improved. Similarly, since the liquid crystal panel P is not contacted, the damage to the electric component mounting portion is small.

19 shows a state in which when a sheet piece FXm is cut into an optical member F1X of a predetermined size by using the laser light irradiation apparatus 100 shown in Fig. 1 as a cutting apparatus, laser light is irradiated on the sheet piece FXm Fig. 6 is a diagram showing a control method for scanning in a rectangular shape. Fig.

19, the code Tr is a movement locus of the target laser light (a desired locus, hereinafter sometimes referred to as a laser light locus), and the code Tr1 indicates a relative movement between the table 101 and the scanner 105 (Hereinafter, also referred to as a light source movement trace). The light source movement trajectory Tr1 has a shape obtained by curving four corner portions of the laser light movement locus Tr having a rectangular shape. The symbol SL1 is a straight line portion other than the corner portion and the symbol SL2 is a curved portion of the corner portion. The code Tr2 indicates that the irradiating position of the laser beam is moved by the first irradiating position adjusting device 151 and the second irradiating position adjusting device 154 while the scanner 105 is moving relative to the light source moving track Tr1, (To be referred to as an adjustment curve hereinafter) indicating how much is shifted (adjusted) in the direction orthogonal to the first direction Tr1. The shift amount (adjustment amount) of the laser irradiation position is represented by the distance between the adjustment curve Tr2 and the laser light movement locus Tr in the direction orthogonal to the light source movement locus Tr1.

As shown in Fig. 19, the light source moving path Tr1 has a substantially rectangular moving locus in which the corner portion is curved. The light source moving path Tr1 and the laser light moving path Tr substantially coincide with each other, and the shapes of the light source moving path Tr1 and the laser light moving path Tr are different only in a region where the corner portion is narrow. When the light source movement locus Tr1 is rectangular, the moving speed of the scanner 105 at the corner portion of the rectangle is slowed, and the corner portion may swell or wave due to the heat of the laser light. 19, the corners of the light source moving path Tr1 are curved so that the moving speed of the scanner 105 becomes substantially constant over the entire light source moving path Tr1.

When the scanner 105 is moving in the linear section SL1, the controller 107 determines that the laser light irradiation locus Tr1 and the laser light movement locus Tr coincide with each other, The laser beam is irradiated from the scanner 105 to the sheet piece FXm without being adjusted by the position adjusting device 151 and the second irradiation position adjusting device 154. [ On the other hand, when the scanner 105 is moving in the bending section SL2, since the light source movement locus Tr1 and the laser light movement locus Tr do not coincide, the first irradiation position adjuster 151 and the second irradiation The irradiation position of the laser light is controlled by the position adjusting device 154 so that the irradiation position of the laser light is arranged on the laser light movement locus Tr. For example, when the scanner 105 is moving at the position denoted by the reference symbol M1, the irradiating position of the laser beam is detected by the first irradiating position adjusting device 151 and the second irradiating position adjusting device 154, Tr1 by a distance W1 in a direction (N1) orthogonal to the first direction. The distance W1 is equal to the distance W2 between the adjustment curve Tr2 and the laser light movement locus Tr in the direction N1 orthogonal to the light source movement locus Tr1. Although the irradiation locus Tr1 of the light source is displaced to the inner side of the laser light locus Tr, the irradiation position of the laser light is adjusted so as to cancel this deviation from the first irradiation position adjuster 151 and the second irradiation position adjuster 154 are positioned outside the light source movement locus Tr1, so that the irradiation position of the laser light is arranged on the laser light travel locus Tr.

As described above, according to the film bonding system 1 of the present embodiment, since the first cutting device 31 and the second cutting device 32 are constituted by the above-described laser light irradiation device, The first sheet piece F1m and the second sheet piece F2m can be cut off sharply, and deterioration of cut quality can be suppressed.

The moving device 106 and the scanner 105 are controlled so as to draw a desired trajectory Tr on the sheet piece FXm under the control of the control device 107. [ In this configuration, only the narrow bending section SL2 is irradiated with the laser beam to be adjusted by the first irradiation position adjusting device 151 and the second irradiation position adjusting device 154. [ The laser beam is scanned onto the sheet piece FXm by the movement of the table 101 by the moving device 106 in the other wide linear section SL1. In the present embodiment, the laser beam is mainly scanned by the moving device 106, and only the area where the irradiation position of the laser beam can not be controlled with high precision by the moving device 106 can be controlled by the first irradiation position adjusting device 151 and the second The irradiating position adjusting device 154 adjusts the irradiating position of the laser beam. This makes it possible to control the irradiating position of the laser beam in a wide range with high accuracy compared with the case where only the moving device 106 or the scanner 105 scans the laser beam.

Further, the imaging direction of the image pickup device 43 is obliquely intersected with the normal direction of the first abutment surface SA1. That is, the imaging direction of the imaging device 43 is set such that the end edge of the second substrate P2 is not drawn in the imaging visual field of the imaging device 43. [ Thereby, the edge of the end portion of the second substrate P2 is not erroneously detected when the end edge ED of the first abutment surface SA1 is detected over the first sheet flap Fl, It is possible to detect only the end edge ED of the surface SA1. Therefore, the end edge ED of the first abutment surface SA1 can be detected with high accuracy.

After the first sheet piece F1m and the second sheet piece F2m of a size outwardly projecting to the outside of the liquid crystal panel P are bonded to the liquid crystal panel P and then the first sheet piece F1m, The first optical member F11 and the second optical member F12 having a size corresponding to the joint surface can be formed on the surface of the liquid crystal panel P by cutting off the excess portion of the two sheet members F2m. This allows the first optical member F11 and the second optical member F12 to be installed with high accuracy up to the vicinity of the bonding surface and to narrow the outer frame portion G of the display region P4, It is possible to achieve miniaturization.

By bonding the first sheet piece F1m and the second sheet piece F2m of a size out of the liquid crystal panel P to the liquid crystal panel P, the first sheet piece F1m, Even when the optical axis directions of the first sheet piece F1m and the second sheet piece F2m change in accordance with the position of the sheet piece F2m, the liquid crystal panel P can be aligned and joined have. This makes it possible to improve the precision of the optical axis direction of the first optical member F11 and the second optical member F12 with respect to the liquid crystal panel P and improve the uniformity and contrast of the optical display device.

The first sheet piece F1m and the second sheet piece F2m are laser cut by the first cutting device 31 and the second cutting device 32 to cut the first sheet piece F1m, The force is not applied to the liquid crystal panel P, cracks and cuts are less likely to occur, and stable durability of the liquid crystal panel P can be obtained.

In the present embodiment, a configuration in which a sheet is cut is described as an example in which a predetermined processing is performed by irradiating an object with a laser beam. However, the present invention is not limited to this. For example, in addition to dividing the sheet piece into at least two pieces, it is also assumed that a perforated line passing through the sheet piece is inserted, and a groove (notch) with a predetermined depth is formed in the sheet piece. More specifically, for example, cutting (cutting) of the sheet end, half cut, and marking are also included.

Further, in the present embodiment, the case where the drawing locus of the laser beam irradiated from the laser light irradiating device is rectangular (square) in plan view has been described as an example, but the present invention is not limited to this. For example, the drawing locus of the laser beam irradiated from the laser light irradiating device may be a triangular shape when seen from the plane, or a polygonal shape having a pentagon or more when viewed from a plane. Further, the shape is not limited to this, and may be a star shape in plan view or a geometric shape in plan view. It is possible to apply the present invention to such a drawing locus.

In this embodiment, after the optical sheet FX is pulled out from the end of the roll and the sheet piece FXm of a size that is discharged to the outside of the liquid crystal panel P is bonded to the liquid crystal panel P, The optical member F1X having a size corresponding to the joint surface of the liquid crystal panel P is cut from the piece FXm. However, the present invention is not limited to this. For example, the present invention can be applied to a case in which a sheet-shaped optical film chip cut to a size that is outwardly outward of the liquid crystal panel P is bonded to the liquid crystal panel without using a roll fabric.

While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it goes without saying that the present invention is not limited to these examples. All shapes, combinations, and the like of each component member shown in the above-described example are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

1: Film Bonding System (Manufacturing Apparatus for Optical Member Assembly)
23: Clamping roll (joining device)
31: First cutting device
32: second cutting device
100: laser light irradiation device
101: Table
101s: Holding face
102: laser oscillator
105: Scanner
106: Mobile device
108: Second condensing lens
141: first condensing lens
143: iris member
145: Collimate lens
P: Liquid crystal panel (optical display part)
P1: first substrate
P2: second substrate
FX: Optical sheet
FXm: sheet
F1X: optical member
PA1: first optical member joined body (sheet ring bonding body)
PA4: fourth optical member joined body (optical member joined body)
SA1: first bonding surface
ED: End edge

Claims (5)

A laser oscillator for emitting laser light;
A condenser lens for condensing the laser beam emitted from the laser oscillator,
A diaphragm member for fixing the laser beam condensed by the condenser lens,
And a collimator lens for collimating the laser light that is tightened by the diaphragm member. The laser irradiation apparatus according to claim 1, wherein the diaphragm member is disposed in the vicinity of a rear side focus of the condensing lens. A table having a holding surface for holding an object;
A laser oscillator for emitting laser light;
A first condenser lens for condensing the laser beam emitted from the laser oscillator,
A diaphragm member for tightening the laser beam condensed by the first condenser lens,
A collimator lens for collimating the laser light that is tightened by the diaphragm member,
A scanner which scans the laser light parallelized by the collimator lens in a plane parallel to the holding surface,
And a moving device for moving the table and the scanner relative to each other. The laser irradiation apparatus according to claim 3, comprising a second condenser lens for condensing the laser light collimated by the collimator lens toward the holding surface. An apparatus for manufacturing an optical member joined body including an optical member joined to an optical display part,
A joining device for joining a sheet piece of a size that protrudes outside the optical display component to the optical display component to form a sheet joining body;
The sheet piece of the sheet singly bonded body is cut off from the sheet singly bonded body along the edge of the joint surface of the optical display part and the sheet piece to cut out the sheet piece outwardly of the joint surface, And a cutting device for forming the optical member of a corresponding size,
The cutting device is constituted by the laser light irradiating device according to any one of claims 1 to 4 and is characterized in that the laser light irradiated from the laser light irradiating device Manufacturing apparatus.

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