TWI581866B - Adhesive dissipation apparatus and method thereof, manufacturing apparatus for member of display device and method thereof - Google Patents

Description

Adhesive coating device and method, and member manufacturing device for display device And method

The present invention relates to a binder coating technique and a technique for manufacturing a member for a display device which are, for example, a technique for applying a binder to a workpiece in order to fit a pair of workpieces constituting the display device.

In general, a flat panel display device (flat panel display) typified by a liquid crystal display or an organic electroluminescence (EL) display, and a touch panel (touch panel) for displaying a module and an operation And a protective panel (cover panel) that protects the surface is laminated. These display modules, touch panels, cover panels, and the like (hereinafter referred to as work) are incorporated in the casing of the flat panel display. The display module includes a plurality of members such as a display panel including a polarizing plate, a drive circuit, and a printed circuit board (tab), and is configured in a plurality of layers. The cover panel also has a person who is separate from the touch panel and a composite panel that is configured to incorporate a touch panel.

In order to fit the workpiece, there are a method of using a bonded sheet and a method of using a resin adhesive. The adhesive sheet is relatively expensive compared to the adhesive, and requires a step of peeling off the release paper. Therefore, from the viewpoint of the cost reduction in recent years, etc., the use of adhesive bonding is the mainstream.

Further, if an air layer enters between the stacked workpieces, the visibility of the display surface of the display is lowered due to external light reflection. In order to cope with this, when bonding each workpiece, an adhesive layer is formed by filling a gap (gap) between the workpieces by using an adhesive.

The adhesive layer has a function of protecting the workpiece as a spacer between the workpieces. Further, the area of the workpiece is also increased due to the enlargement of the display, etc., and the workpiece is liable to be deformed. Therefore, in order to protect the workpiece by absorbing deformation, there is a tendency that the thickness required for the adhesive layer is increased. For example, the adhesive layer is required to have a thickness of several hundred μm.

If this thickness is ensured, the amount of binder required will increase. As a result, the adhesive applied to the workpiece easily flows and is exposed from the workpiece. Thereby, the adhesive is applied to the entire surface of the workpiece and the temporary hardening is performed so that the coating shape does not collapse (refer to Patent Document 1).

That is, a coating of an ultraviolet (UV)-curable resin is applied to a coated surface of a workpiece from a slit-type nozzle, and the nozzle is moved relative to the workpiece to apply a bond to the entire coated surface of the workpiece. Agent. At this time, the UV light is irradiated to the vicinity of the nozzle immediately after the nozzle, and the irradiation portion is temporarily hardened to suppress the flow.

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-71281

In the prior art described above, in order to make the coating thickness of the adhesive uniform, it is desirable to make the relative moving speed of the nozzle and the workpiece constant. Moreover, in order to increase the coating efficiency, the fixed speed must be a relatively high speed.

However, if the high speed is fixed from the start end to the end end of the application of the workpiece, the shape of the adhesive at the start end and the end end is unstable. Therefore, in response to this, the relative speed of the nozzle and the workpiece is changed at the start end and the end end of the coating so that the shape of the adhesive at the coating end becomes a straight line without strain. For example, acceleration is gradually performed from the start end, and after the predetermined high speed is reached, the coating is continued while the speed is maintained, and the end is decelerated near the end and stopped at the end.

As described above, when the relative speed of the nozzle and the workpiece is accelerated and decelerated, the illuminating portion that relatively moves with the nozzle with respect to the workpiece also accelerates and decelerates. As a result, the irradiation unit changes the amount of the irradiation energy of the UV light per unit area of the adhesive, and the temporary hardening state fluctuates. When the temporary hardening state fluctuates, the flatness of the coating, the uniformity of the coating thickness, and the adhesiveness at the time of bonding are partially changed, thereby affecting the bonding quality of the member for a display device.

The present invention has been made to solve the problems of the prior art, and an object thereof is to provide a temporary hardening state portion capable of suppressing an adhesive applied to a workpiece. The adhesive application device and the adhesive application method which are capable of preventing the deterioration of the bonding quality, and further, provide a manufacturing apparatus and a manufacturing method for manufacturing a member for a display device having high bonding quality.

In order to achieve the object, the present invention is an adhesive coating apparatus which applies at least one of a pair of workpieces constituting a display device to an adhesive which is hardened by irradiation energy, and is characterized in that: a coating portion with respect to a workpiece Applying an adhesive to the workpiece while moving relatively; and irradiating the irradiation portion with respect to a unit area of the adhesive coated on the workpiece according to a change in a relative moving speed of the coating portion and the workpiece The amount of energy becomes a fixed way to illuminate energy.

The illuminating portion may also change a relative moving speed with respect to the workpiece independently of the coating portion according to a change in a relative moving speed of the coating portion and the workpiece.

The illuminating unit may switch between two states in which the coating portion is maintained at a fixed interval and relatively moved relative to the workpiece, in accordance with a change in a relative moving speed of the coating portion and the workpiece. And a state of relative movement with respect to the workpiece independently of the coating portion.

It is also possible that when the relative moving speed of the coating portion and the workpiece is decelerated near the coating end of the workpiece, the illuminating portion moves at an acceleration that maintains a relative speed before deceleration, and when the coating portion is When the relative moving speed of the workpiece is accelerated near the coating end of the workpiece, the illuminating portion moves at a deceleration rate that maintains the relative speed before the acceleration.

The adhesive application device may have a stage on which the workpiece is placed and moved relative to the application portion and the irradiation portion.

The coating portion may have a nozzle having a slit that ejects the adhesive from a continuous linear discharge port.

The illuminating unit may also start irradiation when the coating unit reaches the starting end.

The coating portion may also change the amount of application of the adhesive according to the relative movement speed with the workpiece.

The coating portion may increase the coating amount of the adhesive as the relative movement speed with the workpiece is accelerated, and the coating amount of the adhesive may be fixed when the relative moving speed with the workpiece is fixed, and The relative movement speed with the workpiece is decelerated to reduce the amount of the adhesive applied.

The illuminating portion may also change the amount of energy irradiation according to a change in the relative moving speed of the coating portion and the workpiece.

The workpiece may also be a cover panel constituting a display device, a touch panel, or a composite panel of a cover panel and a touch panel.

Further, each of the above forms can also be understood as an invention of a method of applying a binder. Moreover, the manufacturing apparatus of the member for display devices which have the said adhesive-coating apparatus, and the manufacturing method of the member for the display apparatus containing the adhesive-coating method are also one aspect of this invention.

As described above, according to the present invention, it is possible to prevent the temporary hardening state of the adhesive applied to the workpiece from being partially changed, thereby preventing the deterioration of the bonding quality. low.

1‧‧‧Binder coating device

2‧‧‧Fitting device

3‧‧‧ Hardening device

4‧‧‧Transporting device

5‧‧‧Photography Department

7‧‧‧Control device

10‧‧‧ Coating Department

11‧‧‧ Department of Irradiation

21‧‧‧ chamber

22‧‧‧ Lower side panel

23‧‧‧Upper side panel

25‧‧‧ drive mechanism

31‧‧‧ mounting table

33‧‧‧Irradiation unit

40‧‧‧Conveyor

41‧‧‧Retaining components

41a, 41b‧‧‧ arms

42‧‧‧ Track

61, 62‧‧‧Distributor

100‧‧‧Manufacturing device for display device

200‧‧‧Loader

300‧‧‧ Unloader

A, B, C, D, E, F, G, H‧‧‧ points

J‧‧‧Support

K‧‧‧ stage

L‧‧‧Components for display devices

M‧‧‧ drive mechanism

N‧‧‧ inside frame

O‧‧‧Printing frame

P‧‧‧Control device

R‧‧‧Binder

R1‧‧‧ adhesive layer

S‧‧‧Workpiece

S1‧‧‧ LCD panel

S2‧‧‧ Cover panel

S10‧‧‧ laminated body

T‧‧‧ tank

UV‧‧‧UV

Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention.

2 is a perspective view showing a coating portion, an irradiation portion, and a temporarily cured state in the embodiment.

Fig. 3 is a time chart showing the operation of each unit in the embodiment.

(A) to (D) of FIG. 4 are explanatory views showing operations from the start of application of the embodiment to the end of the application end.

(A) to (D) of FIG. 5 are explanatory views showing operations from the application end of the embodiment to the end of irradiation.

FIG. 6 is a schematic configuration diagram of a manufacturing apparatus of a member for a display device according to the first embodiment of the present invention.

Fig. 7 is a view showing a schematic configuration and an operation of a bonding apparatus.

Fig. 8 is a schematic configuration diagram of a curing device.

Fig. 9 is a schematic configuration diagram of a conveying device.

(A) of FIG. 10 is a plan view of a liquid crystal panel in which an adhesive layer is formed. (B) of FIG. 10 is a side view of a liquid crystal panel in which an adhesive layer is formed. (C) of Fig. 10 is a bottom view of the cover panel. (D) of Fig. 10 is a side view of the cover panel.

Fig. 11 is a schematic configuration diagram of a conveying device according to another embodiment of the present invention.

Embodiments of the present invention (hereinafter referred to as embodiments) will be specifically described with reference to the drawings.

[First Embodiment]

[composition]

First, the configuration of the adhesive application device 1 (hereinafter referred to as the present device) of the present embodiment will be described with reference to FIGS. 1 and 2 . The workpiece S to be bonded is set as the workpiece S constituting the display device. For example, the liquid crystal module and the cover panel constituting the liquid crystal display device can be used as the workpiece S.

The workpiece S on the adhesive application device 1 is supported on the support portion J with the coated surface facing upward. The support portion J has a stage K on which the workpiece S is placed. The stage K is provided to be reciprocally movable in the horizontal direction by the drive mechanism M. As the drive mechanism M, a ball screw that is rotated by, for example, a drive source is considered. However, any device may be used as long as it can reciprocate the workpiece S in the horizontal direction. The speed at which the drive mechanism M starts, stops, and moves the stage K is controlled by the control device P.

Further, the adhesive application device 1 has a coating portion 10 and an irradiation portion 11. The application unit 10 is, for example, a slit coater having a slit, and the adhesive R accommodated in the tank T is sent by a pump through a pipe serving as a flow path and a valve for adjusting the supply amount. To the workpiece S.

The slit is an opening that is elongated in a direction parallel to the coated surface of the workpiece S and orthogonal to the relative moving direction of the workpiece S, and the length in the longitudinal direction thereof The width of the piece S is equal or slightly shorter than the width of the workpiece S. A nozzle is formed at a tip end portion of the coating portion 10, and the nozzle has the slit at a position facing the workpiece S.

Further, the application unit 10 is provided to be lifted and lowered in a direction orthogonal to the application surface of the workpiece S by, for example, a drive mechanism (not shown). The discharge amount of the binder R from the nozzle is regulated by the control device P controlling the valve and controlling the pump.

Further, the binder R may be any resin that is cured by irradiation of energy from the outside. For example, an ultraviolet (UV) hardening resin or a thermosetting resin is considered. In the present embodiment, an ultraviolet (UV) curable resin will be described. The viscosity of the binder R to be used is not particularly limited. However, as a viscosity which is highly necessary for suppressing the flow by temporary hardening, it is assumed that it is 2 thousand cps to tens of thousands of cps, and it is preferably 2 thousand cps to 5 thousand cps which is relatively low in viscosity.

The illuminating unit 11 is a processing unit that irradiates the adhesive R with energy for temporary hardening. For example, when the binder R is a UV curable resin, the illuminating portion 11 irradiates the UV light from the UV light source to the binder R coated on the workpiece S. In the illuminating unit 11, for example, a plurality of UV light sources such as light emitting diodes (LEDs) are arranged at equal intervals in a direction parallel to the coated surface of the workpiece S and orthogonal to the relative moving direction of the workpiece S. Further, when the binder R is a thermosetting resin, the irradiation unit 11 irradiates heat energy from the heat source. In the irradiation unit 11 in this case, for example, an infrared (Infrared Radiation, Ir) light source such as a plurality of LEDs is disposed at equal intervals in a direction parallel to the application surface of the workpiece S and orthogonal to the relative movement direction of the workpiece S.

The irradiation of the illuminating unit 11 is such that the adhesive R is temporarily hardened. get on. Temporary hardening refers to a state in which it has not reached full hardening. For example, the binder R can be temporarily hardened by the amount of energy that is less than the amount of energy required to completely harden. For example, the adhesive R can be temporarily hardened by irradiation with a weak intensity or irradiation for a short period of time. Further, in some UV curable resins, when UV is irradiated to the atmosphere, a temporary hardening state of a type in which the hardening of the surface of the binder R does not progress is caused by oxygen inhibition or the like. Further, the ON (ON), OFF (OFF), and the intensity of the irradiation energy of the irradiation of the irradiation unit 11 are controlled by the control device P.

Further, the illuminating unit 11 is provided, for example, in a state in which the interval between the horizontal direction of the application unit 10 and the application unit 10 are maintained in a fixed state, and the relative movement direction of the workpiece S by a drive mechanism (not shown). A state of being moved independently of the coating unit 10. Further, the start, stop, and speed of the movement of the irradiation unit 11 are controlled by the control device P.

The control device P controls the movement of the stage K and the application portion so that the coating thickness of the adhesive R applied to the workpiece S is uniform over the entire surface, and the amount of energy per unit area of the adhesive R is fixed. The lifting and lowering of 10 and the amount of discharge of the adhesive R and the movement of the illuminating unit 11. The control device P can be realized by, for example, a dedicated circuit or a computer operating in a predetermined program. The details of the operation of each unit by the control of the control device will be described below as the action of the present embodiment.

[effect]

The operation of the present embodiment having the above configuration will be described with reference to the explanatory diagrams of FIGS. 1 and 2, the timing chart of FIG. 3, and the state transition diagrams of FIGS. 4 and 5. another The positions, sizes, and the like of the stage K, the workpiece S, the application portion 10, and the irradiation portion 11 in FIGS. 4 and 5 are merely illustrative for convenience of explanation.

[summary]

First, as shown in FIG. 1, the stage K on which the workpiece S is placed is moved by the drive mechanism M in the horizontal direction (from the right side to the left side indicated by the arrow in the figure) directly below the application unit 10 and the irradiation unit 11. The relative movement of the coating portion 10 and the irradiation portion 11 with respect to the stage K is equivalent to the relative movement with respect to the workpiece S.

The application of the adhesive R starts from the end of one side of the workpiece S (the left end in the drawing), and ends at the end (the right end in the drawing) of the opposite side. The start end side of the start of the coating was set as the coating upstream side, and the end end side of the coating end was set as the coating downstream side. In addition, as shown in FIG. 2, the coating portion directly disposed on the coating upstream side of the coating portion 10 is irradiated with energy for temporary hardening such as UV light, and the adhesive R is temporarily hardened.

Since the irradiation unit 11 can move independently of the application unit 10, the irradiation unit 11 can relatively move relative to the stage K independently of the relative movement of the application unit 10 with respect to the stage K at an appropriate timing. That is, the relative moving speed of the illuminating portion 11 with respect to the stage K is changed in accordance with the change in the relative moving speed of the coating portion 10 with respect to the workpiece S, whereby the amount of the irradiation energy per unit area with respect to the adhesive R is fixed. .

(time map)

Next, the operation timing of each part of the adhesive coating apparatus 1 will be described with reference to the time chart of FIG. The horizontal axis of Fig. 3 is time. (a) on the vertical axis of Fig. 3 is the moving speed of the stage K, and (b) is the discharge amount of the adhesive R from the coating unit 10, (c) is the height of the coating unit 10, (d) is the ON and OFF of the light emission of the irradiation unit 11, and (e) is the moving speed of the irradiation unit 11. The following explains (a) to (e) in detail.

(a) Movement speed of the stage

The time point A indicates that the coating is started. The time from the time point B to the time point C indicates the time at which the stage K becomes a constant speed. The constant speed is a fixed speed at which the adhesive R is applied to the workpiece S with a uniform thickness when the amount of the adhesive R discharged per unit time of the coating unit 10 is a fixed amount. This constant speed differs depending on the viscosity of the binder R, the amount of discharge, the desired coating thickness, and the like.

The speed of the stage K is accelerated from the time point A, and reaches a constant speed at the time point B. The stage K maintains a state of constant speed, and starts decelerating from a time point C near the time point D at which the coating is completed, and stops at the time point D. Thereafter, the stage K is moved again from the time point E so that the coating unit 10 is retracted from the stage K and the irradiation unit 11 comes to the application end of the adhesive R, and is decelerated after a short time of acceleration and at the time point F. stop.

(b) The amount of the adhesive from the coating portion

At the time point A, the adhesive R is ejected from the nozzle of the coating unit 10. The coating unit 10 accelerates the loading of the stage K from the time point A, and increases the discharge amount so that the coating amount per unit area of the workpiece S is fixed. Since the stage K is maintained at a constant speed from the time point B to the time point C, the discharge amount of the application portion 10 is also fixed. Thereby, the coating amount per unit area of the workpiece S is fixed. The coating unit 10 reduces the discharge amount so that the coating amount per unit area of the workpiece S is fixed from the time point C in accordance with the deceleration of the stage K. Then, the ejection is stopped at the time point D. When the discharge is stopped, the pump is operated in the opposite direction to the supply, whereby the flow of the adhesive R can be prevented from dripping.

The discharge amount is determined from the time point A to the time point D in such a manner as to be a desired fixed coating thickness. In other words, even if the stage K is accelerated or decelerated, the discharge amount is changed so as to be the same coating thickness as the section of the constant speed.

Further, (b) shows a change in the discharge amount of the adhesive R from the coating unit 10, and does not necessarily coincide with the control timing of the pump, the valve, and the like for supplying the adhesive R and stopping the supply. In other words, since the time lag occurs in the change in the discharge amount and the timing of the control timing and the result of the pump and the valve, the pump and the valve are controlled in such a manner that the discharge amount becomes (b) in consideration of the time lag. Wait.

(c) height of the coating section

The coating unit 10 is at a height (standby height) from the standby position from the workpiece S in the initial state. In order to start the application of the adhesive R, the coating portion 10 must approach the workpiece S and descend to a height (coating height) that can be applied from the nozzle to a desired position of the workpiece S.

That is, before the time point A, the application unit 10 starts to descend from the standby height to the coating height. Then, the adhesive R is started to be ejected at the time point A when the coating portion 10 reaches the coating height. In addition, in FIG. 3, the timing at which the coating height is reached is the same as the time point A, but there is no problem as long as it is before the time point A.

When the stage K is stopped at the time point D, the coating portion 10 is located at the end of the workpiece S. As described in the control of the discharge amount of the binder R, the discharge also ends at the same time as the stop. Then, the application unit 10 rises toward the standby height. Thus, the workpiece S The adhesive R on the side is disconnected from the adhesive R on the nozzle side. The standby height is set to a sufficient height for the adhesive R to be disconnected in such a manner. In addition, the timing of each operation described above is an example. The timing of the vertical movement and the discharge operation of the coating unit 10 does not necessarily coincide with the timing of the movement of the stage K.

(d) Irradiation of the irradiation section

When the moving speed of the stage K becomes a constant speed at the time point B, the irradiation of the irradiation unit 11 is started, that is, the UV light is irradiated. This irradiation start timing is not necessarily limited to the time point B. The irradiation start timing may be a timing that can be irradiated from the application start end of the adhesive R in accordance with the distance from the application position of the application portion 10 to the irradiation portion 11, the speed of the stage K, and the like. Further, the irradiation unit 11 continues the irradiation even after the application of the time point D, and ends the irradiation at the time point F when the irradiation unit 11 reaches the application end.

(e) moving speed of the illuminating part

The irradiation unit 11 does not move relative to the application unit 10 before the time point C, but moves relative to the stage K while maintaining a fixed interval with the application unit 10. Then, when the speed of the stage K with respect to the coating portion 10 starts to decelerate at the time point C, the irradiation portion 11 starts to accelerate in the coating direction. Here, the deceleration (negative acceleration) of the stage K and the acceleration of the irradiation unit 11 are set such that the absolute values other than the sign have the same value. Therefore, the relative moving speed of the illuminating portion 11 with respect to the workpiece S is maintained at a constant speed.

Then, the stage K is stopped at the time point D, but at this time, the irradiation portion 11 does not reach the application end end of the adhesive R. Therefore, the illuminating unit 11 continues to move equivalent to The time to reach the distance of the end of the coating. During this period, the illuminating unit 11 also operates to maintain a constant speed with respect to the relative moving speed of the stage K. That is, the illuminating unit 11 moves at a constant speed during the stop of the stage K.

When the stage K moves from the time point E so that the irradiation unit 11 comes to the application end of the adhesive R, and decelerates after a short time acceleration and stops at the time point F, the irradiation unit 11 from the time point E is fitted thereto. Deceleration starts, then accelerates and returns to a constant speed from time point F. The short-term deceleration and acceleration of the illuminating unit 11 are also set such that the absolute value is equal to the absolute value of the acceleration and the deceleration of the stage K. Therefore, the relative moving speed is maintained at a constant speed. Further, after the irradiation unit 11 ends the irradiation at the time point F, the irradiation starts at the time point G and stops at the time point H.

(coating step)

Next, the coating step of the present embodiment according to the time chart will be described with reference to Figs. 4 and 5 . Further, (A) to (D) described below correspond to (A) to (D) of FIGS. 4 and 5, respectively.

(A) of FIG. 4: When the stage K is moved to the coating start position, the discharge port of the coating unit 10 at the standby height comes to a position directly above the application start end of the workpiece S. Further, the coating portion 10 starts to decrease toward the coating height.

(B) of FIG. 4: When the application portion 10 reaches the coating height and stops, when the adhesive R is ejected from the application portion 10, the adhesive R is supplied to the workpiece S. At the same time, the stage K starts to move in the coating direction, so that the application of the adhesive R to the surface of the workpiece S is started (Fig. 3: time point A). From this time point A, the stage K is accelerated, and the coating unit 10 gradually increases the discharge amount of the adhesive R.

(C) of FIG. 4: When the application start end of the adhesive R applied to the workpiece S reaches the directly above the irradiation portion 11 by the movement of the stage K, the irradiation portion 11 starts to emit UV light (FIG. 3: time point) B). From this time point B, the stage K stops accelerating and becomes a constant constant speed, and the discharge amount of the adhesive R of the application part 10 also stops increasing and becomes fixed. The relative moving speed of the illuminating unit 11 with respect to the workpiece S (the same applies to the adhesive R) also becomes a constant speed from the start of irradiation of the UV light.

(D) of FIG. 4: The stage K starts to decelerate from the application end of the coating unit 10 to the workpiece S (FIG. 3: time point C). With this deceleration, the coating portion 10 gradually reduces the amount of discharge of the adhesive R.

Further, the irradiation unit 11 starts moving in the coating direction independently of the application unit 10 from the time point C, and accelerates the speed. Since the deceleration of the stage K is the same as the absolute value of the acceleration of the irradiation unit 11, the relative movement of the irradiation unit 11 with respect to the workpiece S is maintained at a constant speed.

(A) of FIG. 5: When the application portion 10 reaches directly above the application end of the workpiece S, the stage K is temporarily stopped (FIG. 3: time point D). At this time, the application unit 10 stops the discharge of the adhesive R. The illuminating portion 11 continues to move, but its moving speed is the same as the constant speed. Therefore, the relative movement of the illuminating portion 11 with respect to the adhesive R maintains a constant speed.

(B) of FIG. 5 : In a state where the stage K is stopped with respect to the application unit 10 as described above, the application unit 10 rises and stops at the standby height. Since the application portion 10 is in a state where the discharge of the adhesive R is stopped, the adhesive R on the workpiece S side is disconnected from the adhesive R on the nozzle side at any time before the application portion 10 reaches the standby height. During this period, the illuminating unit 11 also continuously moves at a constant speed.

(C) of Fig. 5: At the timing when the adhesive R is reliably disconnected, the stage K starts moving again (Fig. 3: time point E). This moving distance of the stage K is the distance from which the irradiation portion 11 can reach the coating end. The moving speed of the stage K during this period is shifted to deceleration and then stopped after a short time acceleration (FIG. 3: time point F). The illuminating unit 11 accelerates after being decelerated in accordance with the moving speed of the stage K, and returns to a constant speed at the stop time of the stage K. The absolute value of the deceleration and the acceleration of the irradiation unit 11 is also the same as the absolute value of the acceleration and the deceleration of the stage K. Therefore, the irradiation unit 11 maintains a constant speed with respect to the adhesive R. At the time when the irradiation unit 11 reaches the application end, the irradiation unit 11 stops the irradiation (FIG. 3: time point F).

(D) of FIG. 5: The irradiation unit 11 starts deceleration (FIG. 3: time point G), and thereafter stops (FIG. 3: time point H).

The workpiece S to which the adhesive R is applied as described above is carried out by the transfer device, and the bonding device presses the other workpieces or the like by pressing the pressing device in the vacuum. Further, the bonded workpiece S is moved by a transfer device to a curing device that completely cures the adhesive R by irradiation of UV light.

[effect]

(1) The present embodiment is an adhesive application device 1 that applies at least one of a pair of workpieces S constituting the display device to an adhesive R that is hardened by irradiation energy, and has a coating portion 10 on one side with respect to the workpiece S. The adhesive R is applied to the workpiece S while moving relatively; and the illuminating portion 11 is changed relative to the unit area of the adhesive R coated on the workpiece S according to the change in the relative moving speed of the coating portion 10 and the workpiece S. The amount of irradiation energy is irradiated with energy in a fixed manner.

According to the present embodiment described above, the relative speed of the irradiation portion 11 with respect to the adhesive R applied to the workpiece S is always maintained at a constant speed. Therefore, the amount of irradiation energy of the UV light per unit area with respect to the binder R is fixed, so that unevenness in the temporarily hardened state does not occur. Thereby, the adhesive R is prevented from flowing, and the cushioning property and the adhesiveness are maintained. Therefore, strain or the like at the time of bonding is not obtained, and a uniform adhesive layer can be formed, and the adhesiveness is not impaired.

(2) The illuminating unit 11 changes the relative moving speed with respect to the workpiece S independently of the coating unit 10 in accordance with the change in the relative moving speed of the coating unit 10 and the workpiece S. Therefore, the strain of the adhesive R at the application start end and the application end can be prevented, and the irradiation portion 11 that does not require the lifting operation can be independently changed from the application portion 10 that is required to move up and down to break the adhesive R at the application end. Since the moving speed is simple, the relative speed of the irradiation portion 11 with respect to the adhesive R can be maintained at a constant speed regardless of the operation of the application portion 10 with respect to the adhesive R applied to the workpiece S.

(3) The illuminating unit 11 switches between the two states in which the application unit 10 maintains a fixed interval and maintains a relative movement with respect to the workpiece S, in accordance with a change in the relative movement speed of the application unit 10 and the workpiece S; 10 is a state of relative movement relative to the workpiece S independently. Therefore, the irradiation unit 11 can reliably maintain the irradiation unit 11 with respect to the bonding at a constant speed by switching between the state in which the coating unit 10 is relatively stopped at a fixed interval and the state in which the coating unit 10 is relatively stopped. The relative speed of the agent R.

(4) When the relative moving speed of the coating portion 10 and the workpiece S is at the workpiece S When the vicinity of the coating terminal is decelerated, the illuminating unit 11 moves at an acceleration that maintains the relative speed before deceleration, and when the relative moving speed of the coating unit 10 and the workpiece S accelerates near the application end of the workpiece S, the illuminating unit 11 maintains the relative before the acceleration. The speed deceleration moves. Therefore, even if the relative movement speed of the application portion 10 in the vicinity of the application terminal is decelerated and further accelerated and decelerated in a short time, the relative irradiation of the irradiation portion 11 with respect to the adhesive R can be easily maintained at a constant speed by the acceleration and deceleration of the irradiation portion 11. speed.

(5) The adhesive application device 1 of the present embodiment has a stage K on which the workpiece S is placed and moved relative to the application unit 10 and the irradiation unit 11. Therefore, the coating is performed by the movement on the stage K side, and the configuration in which the coating unit 10 is moved in the coating direction and the irradiation unit 11 that accelerates and decelerates in the coating direction are independently driven. In the case of the case, the composition can be simplified.

(6) The application unit 10 has a nozzle having a slit that ejects the adhesive R from a continuous linear discharge port. In this way, since the nozzle having the slit which is ejected from the linear discharge port is used as the application portion 10, the thickness in the direction orthogonal to the application direction can be easily made uniform, and the thickness of the planar coating by the movement can be made. Evenly.

(7) When the irradiation portion 11 reaches the application start end, the irradiation is started, and the irradiation portion 11 does not need to be independently driven at the start end, so that the control can be simplified.

(8) The coating portion 10 changes the discharge amount of the binder R in accordance with the relative speed with the workpiece S, so that coating with a uniform thickness can be performed.

(9) The coating portion 10 increases the discharge amount of the adhesive R as the relative movement speed with the workpiece S accelerates, and makes the relative movement speed with the workpiece S constant. The discharge amount of the binder R is fixed, and the amount of discharge of the binder R is reduced as the relative movement with the workpiece S is decelerated. For example, the application unit 10 increases the discharge amount of the adhesive R when the workpiece S is accelerated from the application start end, and fixes the discharge amount when the speed of the workpiece S is fixed, and decreases the discharge amount when the workpiece S decelerates. Therefore, the thickness of the adhesive R can be made uniform throughout the entire surface of the workpiece S from the coating start end to the coating end.

[Second Embodiment]

The present embodiment will be described with reference to FIGS. 6 to 10 in addition to FIGS. 1 to 5 .

[workpiece]

The present embodiment is a manufacturing apparatus for a member for a display device that manufactures a laminated body of a member for a display device. The member for a display device includes a member having a display function as a member such as a laminated display panel and a cover panel, and includes a member such as a laminated cover panel and a touch panel, and has no display function only in the case of the member. member. In other words, the workpiece to be laminated is provided with various workpieces such as a display panel, a touch panel, a cover panel, a backlight, or a light guide plate. In the present embodiment, an example is described in which a display panel and a cover panel are bonded together via an adhesive. A member for a display device.

The display panel has various types such as a liquid crystal panel or an organic EL panel, and the shape thereof is various. Here, as an example, a rectangular liquid crystal panel S1 as shown in FIG. 10(A) will be described as an example. The adhesive may be applied to either the liquid crystal panel S1 or the cover panel S2 or both. In the present embodiment, as shown in FIG. 10(B), the adhesive is applied to the surface of the liquid crystal panel S1 with a predetermined thickness. An example of forming the adhesive layer R1. The adhesive is applied over the entire surface of the liquid crystal panel S1. However, in order to prevent the adhesive from being exposed between the two panels at the time of bonding, the adhesive is applied so as to slightly leave the outer edge of the liquid crystal panel S1. In other words, the adhesive layer R1 has the same rectangular shape as the liquid crystal panel S1 and is slightly smaller than the liquid crystal panel S1.

There are various types and shapes of the cover panel. In the present embodiment, as shown in FIG. 10 (C) and FIG. 10 (D), a rectangular cover panel S2 larger than the liquid crystal panel S1 is used. A printing frame O having a predetermined width is formed on the bottom surface side of the cover panel S2 so as to modify the outer edge. That is, when viewed from the bottom, the inner frame N surrounded by the printing frame O is formed on the cover panel S2. In the example of Fig. 10, the inner frame N has a rectangular shape and has a curvature at four corners. However, the inner frame N is not limited to the illustrated example, and may be other polygonal shapes such as a pentagon or a hexagon, or may be four corners in a plan view. Become a right angle. Further, as shown in FIG. 10(D), the four corners of the inner frame N become substantially right angles in the cross-sectional view. The size of the inner frame N is slightly smaller than that of the liquid crystal panel S1. The above-described adhesive layer R1 is applied in the same shape and size as the inner frame N.

The surface of the liquid crystal panel S1 to which the adhesive is applied is bonded to the surface of the cover panel S2 on which the printing frame O is formed to constitute a member for a display device. At the time of bonding, the outer edge of the adhesive applied to the liquid crystal panel S1 is laminated so as to overlap the line of the inner frame N of the cover panel S2. Since the liquid crystal panel S1 is slightly larger than the inner frame N of the cover panel S2, the outer edge of the liquid crystal panel S1 is laminated on the printing frame O. Thereby, when the laminated body formed is observed from above, the outer edge of the liquid crystal panel S1 is not covered by the printing frame O, and a good appearance can be obtained.

[Manufacturing device for member for display device]

In the manufacturing apparatus of the member for a display device of the present embodiment, the member for the display device is manufactured by applying the above-described adhesive to the liquid crystal panel S1 and bonding the liquid crystal panel S1 and the cover panel S2. As shown in FIG. 6 , the manufacturing apparatus 100 for a display device member includes a binder coating device 1 , a bonding device 2 , a curing device 3 , a conveying device 4 , and a control device 7 .

The liquid crystal panel S1 and the cover panel S2 are carried into the manufacturing apparatus 100 for the display device member by the loader 200, and are transported by the transport device 4. The adhesive application device 1, the bonding device 2, and the curing device 3 are disposed along the conveying device 4. The liquid crystal panel S1 and the cover panel S2 are picked up from the transport device 4 by a pick-up device (not shown), and the liquid crystal panel S1 and the cover panel S2 are carried in and out of the respective devices via a carry-in (not shown). The display device member L is manufactured by the steps of the respective devices, and the display device member L is carried out from the manufacturing device 100 for the display device by the unloader 300. Hereinafter, the configuration and operation of each device will be described in detail.

[Binder coating device]

The adhesive application device 1 is the same as the first embodiment. In the present embodiment, an example in which the binder R is applied to the surface of the liquid crystal panel S1 as described above will be described. However, the cover panel S2 may be applied or the both panels may be applied.

[Fitting device]

The bonding apparatus 2 laminates and bonds the liquid crystal panel S1 and the cover panel S2 as a bonding part of the manufacturing apparatus 100 of the member for display devices.

As shown in FIG. 7(A), the bonding apparatus 2 has a configuration in which the lower side plate 22 and the upper side plate 23 are disposed opposite to each other in the chamber 21. The chamber 21 is movable up and down, and when moving upward, the lower side plate 22 and the upper side plate 23 are opened to the outside, and can be carried into the liquid crystal panel S1 and the cover panel S2. When the lower side plate 22 and the upper side plate 23 are housed in the chamber 21 when moving downward, a sealed space is formed inside the chamber 21. The chamber 21 can adjust the internal pressure by a venting member (not shown). In other words, when the liquid crystal panel S1 and the cover panel S2 are carried in, the chamber 21 is lowered, the inside is sealed, and the pressure is reduced, and the pressure is applied in a reduced pressure environment.

In the present embodiment, as an example, a case will be described in which the liquid crystal panel S1 to which the adhesive R is applied is supported by the lower side plate 22, and the cover panel S2 is held by the upper side plate 23.

As the holding mechanism of the upper side plate 23, for example, an electrostatic chuck, a mechanical chuck, a vacuum chuck, an adhesive chuck, and the like which are currently or in the future may be applied. A variety of chucks can also be used in combination. The upper side plate 23 is provided with a drive mechanism 25. The upper side plate 23 is movable in the horizontal direction and the vertical direction by the drive mechanism 25.

The position of the liquid crystal panel S1 and the cover panel S2 is aligned by moving the upper side plate 23 in the horizontal direction. Further, as shown in FIG. 7(B), the upper side plate 23 is moved downward, and the held cover panel S2 is pressed against the liquid crystal panel S1 supported by the lower side plate 22 to be laminated. The liquid crystal panel S1 and the cover panel S2 are bonded together via the adhesive R applied on the surface of the liquid crystal panel S1 to form a laminated body S10.

In addition, the lower side plate 22 may also have the same holding mechanism as the upper side plate 23. The position of the liquid crystal panel S1 to be supported is not shifted.

[hardening device]

The curing device 3 is used as a curing portion of the manufacturing device 100 for the display device member to cure the adhesive layer R1 of the bonded liquid crystal panel S1 and the cover panel S2. As shown in FIG. 8(A) and FIG. 8(B), the curing device 3 includes a mounting table 31 on which the laminated body S10 is placed, and an irradiation unit 33 disposed on the mounting table 31.

The irradiation unit 33 includes one or a plurality of lamps or LEDs that can irradiate hardening energy, such as UV light. The irradiation of the irradiation unit 33 is adjusted in such a manner as to illuminate the amount of energy required to harden the adhesive layer R1. The amount of energy is adjusted by the intensity and time of the illumination. For example, the intensity and time of irradiation can be adjusted in such a manner that the UV light required to completely cure the adhesive layer R1 temporarily hardened in the adhesive coating device 1 can be irradiated. Of course, the same applies to the case where the adhesive layer R1 which is not accompanied by temporary hardening is completely cured.

[transport device]

The transport device 4 constitutes a transport unit of the manufacturing device 100 for the display device member. The transport device 4 includes a transport unit that transports the liquid crystal panel S1 and the cover panel S2 to each of the above-described adhesive application device 1 , the bonding device 2 , and the curing device 3 , and a drive mechanism of the transport unit. As the transport unit, for example, a turntable, a conveyor, a pick-up element that can be moved on the rail, and the like are considered, and any means for transporting the liquid crystal panel S1 and the cover panel S2 between the respective devices is considered. It can also be any device.

In the present embodiment, an example in which the conveyor 40 is used as the conveying unit will be described as shown in Fig. 9 . The liquid crystal panel S1 and the cover panel S2 are placed on the surface of the conveyor 40 Moved on. The adhesive application device 1, the bonding device 2, and the curing device 3 are disposed along the conveyor 40, and the panel can be carried from the conveyor 40 to each device and the panel can be carried out from each device by a pickup member (not shown).

Here, for convenience of explanation, the direction in which the two panels are transported by the conveyor 40 is referred to as "transport direction", and the direction orthogonal to the transport direction on the conveyor 40 is referred to as "traveling direction". The loader 200 side in the conveyance direction of the conveyor 40 is referred to as "upstream side", and the unloader 300 side is set to "downstream side". The side in the traverse direction of the conveyor 40 near the adhesive application device 1, the bonding device 2, and the curing device 3 is referred to as "deep side", and the far side is referred to as "near side".

The imaging unit 5 is provided on the transport device 4 so as to be adjacent to each other in the traverse direction. The photographing unit 5 is disposed between the adhesive applying device 1 on the conveyor 40 and the bonding device 2. The photographing unit 5 is connected to a drive mechanism (not shown). The photographing unit 5 can be moved at least in the traverse direction by the drive mechanism.

By a combination of the movement of the conveyor 40 in the conveyance direction and the movement of the image pickup unit 5 in the traverse direction, a desired portion of the liquid crystal panel S1 and the cover panel S2 conveyed on the conveyor 40 can be imaged. The specific operation of the photographing unit 5 will be described in detail in the action item.

[control device]

The control device 7 is a device that controls the operation of the manufacturing device 100 for the member for the display device. The control device 7 performs operation control of the devices constituting each unit, and control of the transport timing of the liquid crystal panel S1 and the cover panel S2, and detection processing or calculation processing required for the operation of each device. In addition, the control device 7 also has the first The function of the control device P of the embodiment.

In the present embodiment, the control device 7 performs position detection processing using, in particular, an image acquired by the imaging unit 5. Further, the positional alignment operation of the bonding portion is controlled using the positional information detected in the position detecting process. The control device 7 further includes a storage unit that stores a reference value and the like necessary for performing the above-described processing. The specific content of the above-described processing of the control device 7 will also be described in detail in the action item.

The control device 7 can be realized by, for example, a dedicated circuit or a computer operating in a predetermined program. Further, an input device such as a switch, a touch panel, a keyboard, or a mouse may be connected to the control device 7, and the control device 7 may be operated by an operator. Further, an output device such as a display, a lamp, or a meter for confirming the state of the device or the panel may be connected.

[effect]

The operation of the present embodiment having the above configuration will be described with reference to Figs. 6 to 10 . In addition, the position, size, and the like of each device or the liquid crystal panel S1 and the cover panel S2 are merely illustrative for convenience of explanation.

First, as shown in FIG. 6 , the liquid crystal panel S1 and the cover panel S2 are carried into the manufacturing apparatus 100 for the display device member by the loader 200, and are transported on the conveyor 40 of the transport apparatus 4. Each of the panels is conveyed such that the surface to be the bonding surface is on the upper side. In other words, in the present embodiment, the liquid crystal panel S1 is placed on the conveyor 40 so that the surface on which the adhesive layer R1 is formed faces upward, and the cover panel S2 is placed on the surface so that the surface on which the printing frame O is formed faces upward. On the machine 40.

[Binder coating treatment]

The liquid crystal panel S1 conveyed on the conveyor 40 is picked up by a pickup element (not shown) and placed on the stage K of the adhesive application device 1 (see FIG. 4(A)). Then, the application of the adhesive R is performed in the same manner as in the first embodiment. Hereinafter, a layer of the adhesive R coated on the liquid crystal panel S1 and temporarily hardened is referred to as an adhesive layer R1.

[Photography processing, position detection processing]

The liquid crystal panel S1 in which the adhesive layer R1 is formed is carried out from the adhesive application device 1 by a pick-up element (not shown), and is placed on the conveyor 40 of the transport device 4 again to be merged with the cover panel S2. As shown in FIG. 9, the liquid crystal panel S1 and the cover panel S2 are placed so as to be adjacent to each other in the traverse direction of the conveyor 40 and arranged substantially in parallel. In the drawing, the liquid crystal panel S1 is placed on the deep side of the conveyor 40, and the cover panel S2 is placed on the front side of the conveyor 40. However, the placement position is not limited thereto, and may be a liquid crystal panel. S1 is placed on the near side of the conveyor 40, and the cover panel S2 is placed on the deep side of the conveyor 40. The liquid crystal panel S1 and the cover panel S2 are transported on the conveyor 40 and moved to the lower side of the photographing unit 5.

Here, the imaging processing by the imaging unit 5 and the position detection processing of the control device 7 are performed. The photographing processing and the position detecting processing are processing for acquiring data used for alignment of the two panels of the bonding processing to be described later. As described above, the liquid crystal panel S1 and the cover panel S2 are laminated such that the outer edge of the adhesive layer R1 formed on the liquid crystal panel S1 is superposed on the line of the inner frame N of the cover panel S2. That is, the four corners of the adhesive layer R1 to be formed on the liquid crystal panel S1 and the four corners of the inner frame N of the cover panel S2 (Hereafter, simply referred to as "four corners of the cover panel S2"), the bonding is performed in such a manner as to be aligned. In the case where the four corners of the two panels are offset, the offset must be corrected before fitting. Therefore, the four corners of the inner frame N of the liquid crystal panel S1 and the cover panel S2 are imaged in the photographing process, and the coordinates of the four corners of the two panels are determined in the position detecting process.

The photographing processing and the position detecting processing may be performed separately, but the photographing processing and the position detecting processing may be simultaneously performed by the movement of the combined conveyor 40 in the transport direction and the movement of the photographing unit 5 in the traverse direction.

For example, first, the conveyor belt 40 on which the liquid crystal panel S1 and the cover panel S2 are placed is moved in the conveyance direction, and the end portion (hereinafter referred to as the front end) on the upstream side of the panel is stopped at a position below the imaging unit 5. Next, the photographing unit 5 is moved from the front side to the deep side of the apparatus in the traverse direction, and is stopped at each angular position to acquire an image including each corner. Further, the amount of movement and the stop position of the conveyor 40 and the photographing unit 5 can be determined in advance in accordance with the panel size or the like, and are stored in advance in the storage unit of the control device 7.

The control device 7 performs position detection processing each time the photographing unit 5 acquires an image of each corner. The position detection can use a well-known method. For example, in the liquid crystal panel S1, the image is analyzed and the outline of the panel is detected, and a predetermined range centering on the intersection of the two sides of the panel is determined as an angle, and the coordinates thereof are obtained. With respect to the cover panel S2, the image is analyzed in the same manner, and the outline of the inner frame N is detected, and a predetermined range centering on the intersection of both sides of the frame line of the inner frame N is determined as an angle, and the coordinates thereof are obtained.

After the above-described processing is completed at each corner of the front end side, the conveyor 40 is moved in the transport direction, and the downstream end portion (hereinafter referred to as the rear end) of the liquid crystal panel S1 and the cover panel S2 reaches the lower portion of the photographing unit 5 The position stops. Then, the photographing unit 5 is moved while moving from the deep side to the front side of the apparatus in the traverse direction. Take the corners on the back side.

In addition, the processing order of each said corner is an example, and a procedure can be changed suitably. Further, the movement of the conveyor 40 or the movement of the photographing unit 5 may be relative. For example, the photographing unit 5 may be moved not only in the traverse direction but also in the opposite direction to the transport direction or the transport direction.

[Finishing process]

When the photographic processing and the position detection processing of all the four corners of the liquid crystal panel S1 and the cover panel S2 are completed, the liquid crystal panel S1 and the cover panel S2 are transported on the conveyor 40, and are carried into the bonding apparatus 2 by a pickup element (not shown). . At this time, the loading is performed so as to maintain the angular coordinates detected in the position detecting process.

As shown in FIG. 7(A), in the bonding apparatus 2, the liquid crystal panel S1 in which the adhesion layer R1 is formed is placed on the lower side plate 22. At this time, the surface on which the adhesive layer R1 is formed is placed upward. The cover panel S2 is turned over so that the bonding surface faces downward, and is delivered to the upper side plate 23 to be held by the holding mechanism. The two panels are delivered in such a manner as to maintain the positional information detected by the transport device 4.

At this time, since the chamber 21 moves upward, the lower side plate 22 and the upper side plate 23 are opened. When the conveyance of the two panels is completed, the chamber 21 is driven downward, and the lower side panel 22 and the upper side panel 23 are housed inside the chamber 21. A sealed space is formed inside the chamber 21, and the inside of the sealed space is decompressed by an exhaust member (not shown).

The liquid crystal panel S1 and the cover panel S2 are laminated so as to align the respective four corners as described above. However, since the four corner positions may be offset, the position correction of the liquid crystal panel S1 and the cover panel S2 is performed before bonding. . Position correction This is performed based on the respective angular coordinates detected in the position detecting process of the transport device 4. As the position correction, a well-known method can be used. For example, the position reference value of each corner can be stored in the storage unit of the control device 7 in advance, and the position correction amount can be calculated based on the difference between the position reference value and the detected angular coordinates.

The positional shift of the liquid crystal panel S1 and the cover panel S2 is corrected by moving the upper side plate 23 in the x, y, and θ directions based on the calculated position correction amount. Although an example in which the upper side plate 23 is moved to perform position correction will be described here, the lower side plate 22 or both the upper side plate 22 and the lower side plate 23 may be moved to perform position correction.

After the correction position shift, as shown in FIG. 7(B), the upper side plate 23 is lowered toward the lower side plate 22, and the cover panel S2 held on the upper side plate 23 is pressed against the liquid crystal panel S1 supported on the lower side plate 22. The adhesive layer R1 formed on the surface of the liquid crystal panel S1 is pressed by the lower side plate 22 via the liquid crystal panel S1, and the two panels are in close contact with each other, thereby bonding the two panels.

When the bonding of the liquid crystal panel S1 and the cover panel S2 is completed, the decompression state is released, and the chamber 21 is moved upward to open the sealed space. The laminated body S10 is carried out from the bonding apparatus 2, and is again transported by the conveying apparatus 4. Then, it is carried into the curing device 3 by a pickup element (not shown). Further, in the process of transporting from the bonding apparatus 2 to the curing device 3, the laminated body S10 may be left in the atmosphere for a fixed period of time. During this standing time, the laminated body S10 is pressed by the atmospheric pressure to be stabilized. Further, even if voids remain in the adhesive layer R1, the voids can be reduced by being left for a sufficient period of time.

[hardening treatment]

In the hardening device 3, as shown in Fig. 8, the laminated body S10 is placed on the load. On the stage 31, UV light of the strength required for completely curing the temporarily hardened adhesive layer R1 is irradiated by the irradiation unit 33, thereby completing the main hardening of the adhesive layer R1.

[effect]

(1) The present embodiment includes the adhesive application device 1 of the first embodiment, and the bonding device 2, which bonds a pair of workpieces S, that is, the liquid crystal panel S1 and the cover panel S2 via the adhesive layer R1; and the curing device 3 The adhesive between the liquid crystal panel S1 and the cover panel S2 bonded together by the bonding apparatus 2 is completely cured. Thereby, a member for a display device in which the adhesive layer R1 is uniform can be manufactured.

(2) The manufacturing apparatus 100 for a display device further includes a transfer device 4 that transports the liquid crystal panel S1 and the cover panel S2 between the adhesive application device 1 and the bonding device 2, and the imaging unit 5 is installed in the transfer device On device 4. The bonding apparatus 2 performs alignment of the liquid crystal panel S1 and the cover panel S2 based on the images of the liquid crystal panel S1 and the cover panel S2 imaged by the imaging unit 5. In other words, the image captured by the imaging unit 5 is used for the alignment at the time of bonding, so that the bonding can be performed accurately.

[Other embodiments]

(1) The adhesive R may be applied as a surface to be bonded. For example, it may be applied over the entire single surface of the workpiece S, or may have an uncoated region in a part of the workpiece S. In addition, the binder R does not have to completely reach the edge of the face. There may also be portions where the binder R does not reach the edge.

(2) The workpiece S to be bonded is a workpiece S that constitutes a display device like a cover panel and a display module, and the adhesive R is applied in a planar shape on one surface, and the size and shape thereof are bonded. , materials, etc. are unlimited. As a display device, A display device having a flat plate-like workpiece S such as a liquid crystal display or an organic EL display and which may be used currently or in the future is widely included.

(3) The workpiece S to which the adhesive R is applied may be a display module of a display device, a cover panel, a touch panel, or a cover panel (composite panel) including a touch panel. However, a display module including a plurality of members including a display panel such as a polarizing plate, a drive circuit, and a printed circuit board (label) and having a plurality of layers is also large in strain, and the solid difference in strain is also large. The adhesive R can be uniformly applied even if the strain of the cover panel, the touch panel only, or the composite panel is small. Further, when the light guide plate or the like of the backlight is bonded to the display module, the light guide plate may be understood as the workpiece S. The adhesive R may be applied to any of the display module and the light guide plate. However, in this case, it is preferably applied to the side of the light guide plate having a simple configuration.

(4) It is also possible to apply the binder R to both of the bonded workpieces S. When the adhesive R is applied to both of the workpieces S, only the adhesive R of one workpiece S can be temporarily hardened, and the adhesive R of both the workpieces S can be temporarily hardened.

(5) The coating may be performed by moving the coating portion 10 and the irradiation portion 11 side instead of moving the workpiece S side by the stage K. In this case, when the application unit 10 is accelerated and decelerated, the irradiation unit 11 and the application unit 10 are independently decelerated and accelerated, and the constant speed can be maintained in the same manner as described above.

(6) The irradiation unit 11 may start irradiation while the relative movement speed of the stage K and the application unit 10 is accelerated from the application start end to the constant speed. In this case, the speed of the irradiation unit 11 is set such that the relative movement speed with the stage K becomes a constant speed.

(7) The irradiation unit 11 can also fix the amount of irradiation energy per unit area of the adhesive R by changing the amount of energy irradiation. In other words, when the relative movement speed of the application portion 10 and the workpiece S is accelerated, the amount of irradiation energy is gradually increased, and when the relative movement speed between the application portion 10 and the workpiece S is fixed, the amount of irradiation energy is fixed, and in the coating portion 10 When the relative movement speed of the workpiece S is decelerated, the amount of irradiation energy is gradually reduced. Thereby, the irradiation unit 11 does not need to be configured to be movable independently of the application unit 10, so that the apparatus configuration can be further simplified.

The change in the amount of the irradiation energy can be realized by changing the light-emission intensity of each light source of the irradiation unit 11 and the number of light sources that emit light. For example, the presence or absence of light emission or the light emission intensity of a plurality of light sources disposed in the longitudinal direction of the illuminating unit 11 is controlled. In addition, the irradiation unit 11 can be moved up and down by the elevating mechanism, and the irradiation intensity, the irradiation width, and the like of the irradiation unit 11 can be adjusted by the raising and lowering.

(8) The configuration of the illuminating unit 11 is not limited to the configuration in which a plurality of light sources are arranged. The front end of the optical fiber may be configured as the illuminating portion 11 by guiding light from another constituent light source with an optical fiber. Further, the irradiation unit 11 may include an optical member that irradiates the irradiation unit 11 in a line shape parallel to the slit of the application unit 10 . As the optical member, for example, a collecting lens, a slit, or the like can be applied. The illumination intensity can be adjusted by the optical member in addition to adjusting the intensity of the light source. The irradiation width or the like can also be adjusted by the optical member. Further, a shielding portion such as a shutter or a mask that can selectively change the irradiation range may be provided.

(9) The illuminating unit 11 may be a device that irradiates energy in a dot shape, and the illuminating unit 11 may be parallel to the slit of the coating unit 10 by the scanning mechanism ( The scanning direction is orthogonal to the direction in which the coating direction is orthogonal or the direction similar to this. In this case, the scanning speed of the irradiation unit 11 is also decelerated when the relative movement of the coating unit 10 and the workpiece S is accelerated, and the scanning speed is fixed when the relative movement speed is fixed, and the scanning speed is accelerated when the relative movement is decelerated. Thereby, the irradiation energy per unit area of the irradiation site can be made constant.

Further, when the relative movement of the coating portion 10 and the workpiece S is accelerated, the irradiation intensity of the irradiation portion 11 is increased, and when the relative movement speed is fixed, the irradiation intensity is fixed, and when the relative movement is decelerated, the irradiation intensity is lowered. Thereby, the irradiation energy per unit area of the irradiation site can also be made constant.

(10) The interval between the irradiation unit 11 and the application unit 10 may be an interval at which the irradiation starts before the adhesive R collapses due to viscosity or temperature. Further, in order to remove the irradiation energy, the adhesive R at the tip end of the application portion 10 may be cured, and a cover member such as a shield plate may be provided.

(11) The support of the workpiece S to the stage K can be stabilized by adsorption using a vacuum chuck or an electrostatic chuck.

(12) The configuration and application method of the application portion 10 of the binder R may be applied so as to be spread over a single surface of the workpiece. The coating portion 10 can also apply the adhesive R in a plurality of lines. In this case, a plurality of independent dispensers can also be connected. Further, various devices such as a device coated by a roll, a device coated by a squeegee, or the like can be applied.

(13) The type of the binder R to be used is not limited to the ultraviolet curable resin. Usually a resin that hardens by illuminating electromagnetic waves or heat, but can be current Any adhesive that may be utilized in the future, and applied to hardening by irradiation of energy. In this case, the irradiation unit is changed to an irradiation device, a heating device, a drying device, or the like of various infrared rays or radiation depending on the type of the binder.

(14) In the above-described embodiment, an example in which the conveying device 4 including the conveyor 40 is provided as a conveying unit that conveys the liquid crystal panel S1 and the cover panel S2 is described, but the invention is not limited thereto. For example, as shown in FIG. 11, the transport unit may have a holding element 41 that is disposed on the rail 42 and that has two arms 41a and 41b that are arranged in parallel in the vertical direction.

The liquid crystal panel S1 and the cover panel S2 are respectively held by the two arms 41a and 41b, and are transported on the rail in an opposing manner. The photographing unit 5 is disposed so as to be positioned between the two arms 41a and the arm 41b on the rail. In this case, the imaging unit 5 can include a camera on the upper and lower sides, for example. Thereby, the upper and lower panels can be simultaneously photographed.

(15) The manufacturing apparatus 100 for a display device member may include a device that performs other steps before or after the adhesive application device 1, the bonding device 2, and the curing device 3. For example, a taping unit or the like that packs the completed liquid crystal display panel may be provided. In addition, when the curing treatment is not required depending on the type of the adhesive, or when the curing treatment is performed by the separate device, the manufacturing device 100 for the display device member without the curing device 3 may be formed.

(16) In the above-described embodiment, an example of a workpiece to which the liquid crystal panel S1 and the cover panel S2 are to be bonded is described. However, the adhesive R is applied in a planar shape as long as it is a member constituting the laminate of the display device. The type, size, shape, and material of the member to be bonded to the surface are not limited. That is, as long as it contains a polarizing plate or the like The display panel, the touch panel for operation, the cover panel S2 for protecting the surface, the flat backlight, or the light guide plate for the backlight may be bonded together to form the display device member L. As the display device, a display device having a flat plate-like workpiece such as a liquid crystal display or an organic EL display and which may be used at present or in the future may be widely used.

(17) A pair of workpieces that are bonded to each other may be one piece or a plurality of pieces of laminated body. It is also possible to bond a touch panel, a protective panel, a composite panel or the like to a laminated body in which a display panel, a drive circuit, and a printed circuit board are bonded together. In other words, the number of layers of the workpiece laminated as the member L for the display device is not limited to a specific number.

(18) In the above embodiment, since the adhesive layer R1 is applied in a rectangular shape by bonding a rectangular workpiece, the adhesive layer R1 may be formed into a circular shape or a polygonal shape in combination with the shape of the workpiece.

(19) The inside of the chamber 21 of the bonding apparatus 20 is depressurized and bonded under vacuum, but it may be bonded in the air. In these cases, it is not necessary to provide an element required for temporarily hardening or forming a sealed and decompressed space, and the apparatus can be configured at a lower cost, so that the display panel can be manufactured at low cost.

1‧‧‧Binder coating device

10‧‧‧ Coating Department

11‧‧‧ Department of Irradiation

J‧‧‧Support

K‧‧‧ stage

M‧‧‧ drive mechanism

P‧‧‧Control device

R‧‧‧Binder

S‧‧‧Workpiece

T‧‧‧ tank

Claims (14)

An adhesive coating device that applies at least one of a pair of workpieces constituting a display device to an adhesive that is hardened by irradiation energy, and is characterized in that it includes a coating portion that moves the adhesive while moving relative to the workpiece Applying to the workpiece; and the illuminating unit, according to a change in the relative moving speed of the coating portion and the workpiece from the start end to the end end of the application of the adhesive by the coating portion, On the other hand, the energy is irradiated so that the amount of the irradiation energy per unit area of the adhesive coated on the workpiece is fixed, and the flow of the adhesive is suppressed and temporarily hardened to maintain the cushioning property. The state of adhesion. The adhesive application device according to claim 1, wherein the illuminating portion is independently changed from the coating portion with respect to the coating portion according to a change in a relative moving speed of the coating portion and the workpiece The relative movement speed of the workpiece. The adhesive application device according to claim 1 or 2, wherein the illuminating unit switches between the two states according to a change in a relative moving speed of the coating portion and the workpiece, that is, the coating a state in which the portion is relatively moved with respect to the workpiece while maintaining a fixed interval; and a state in which the portion is relatively moved with respect to the workpiece independently of the coating portion. The adhesive application device according to claim 1 or 2, wherein the illuminating portion is decelerated when a relative moving speed of the coating portion and the workpiece is decelerated near an end end of application of the adhesive To maintain the relative speed before deceleration The acceleration moves, and when the relative moving speed of the coating portion and the workpiece is accelerated near the end end of the application of the adhesive, the illuminating portion moves at a deceleration rate that maintains the relative speed before the acceleration. The adhesive application device according to claim 1 or 2, wherein the adhesive application device has a stage on which the workpiece is placed and moved relative to the application portion and the irradiation portion. The adhesive application device according to claim 1 or 2, wherein the application portion has a nozzle having a slit that ejects the adhesive from a continuous linear discharge port. The adhesive application device according to claim 1 or 2, wherein the irradiation unit starts to irradiate when the application portion reaches the start end. The adhesive application device according to claim 1 or 2, wherein the coating portion changes a discharge amount of the adhesive according to a relative movement speed with the workpiece. The adhesive coating device according to claim 1 or 2, wherein the coating portion increases the amount of the adhesive to be discharged as the relative moving speed with the workpiece is accelerated, when the workpiece is opposed to the workpiece When the moving speed is fixed, the amount of the adhesive to be discharged is fixed, and the amount of the adhesive to be discharged is reduced as the relative moving speed of the workpiece is decelerated. The adhesive application device according to claim 1, wherein the illuminating unit changes an energy irradiation amount according to a change in a relative moving speed of the coating portion and the workpiece. The adhesive application device according to claim 1 or 2, wherein the workpiece is a cover panel constituting a display device, a touch panel, or a composite panel of a cover panel and a touch panel. A method for applying a binder, wherein at least one of a pair of workpieces constituting the display device is coated with an adhesive which is hardened by irradiation energy, wherein the coated portion of the adhesive moves relative to the workpiece while being moved relative to the workpiece The coating portion is coated on the workpiece, and the irradiation portion that irradiates the adhesive with energy is used according to the coating portion between the start end and the end end of the application of the adhesive portion by the coating portion. a change in a relative moving speed of the workpiece, and irradiating the energy in a fixed manner with respect to an amount of irradiation energy per unit area of the adhesive coated on the workpiece, and suppressing the adhesive Flows and temporarily hardens it to maintain cushioning and adhesion. A manufacturing apparatus for a member for a display device, comprising: the adhesive application device according to any one of claims 1 to 11, wherein the bonding portion is configured to paste the pair of workpieces via the adhesive And a curing portion that completely cures the adhesive between the pair of workpieces bonded by the bonding portion. A method for producing a member for a display device, characterized in that a bonding portion is attached to a pair of workpieces on which at least one of the adhesives are applied by the adhesive application method according to claim 12, via the adhesive And The hardened portion is cured by the energy of completely curing the adhesive between the pair of workpieces bonded by the bonding portion.