TWI596070B - Apparatus and method for bonding a desplay panel - Google Patents

Description

Display panel bonding device and bonding method

The present invention relates to a bonding apparatus and a bonding method for bonding a display panel such as a liquid crystal panel and a touch panel to a bonding object. There is also a case where the liquid crystal panel is attached to the touch panel by using the touch panel as a bonding object.

In the bonding apparatus of the present invention, the display panel housed in the vacuum chamber is attached to the bonding object in a vacuum environment, and the bonding device is disclosed in the case that the applicant has previously proposed Patent Document 1 is described. In Patent Document 1, a table that supports a workpiece holder, a diaphragm, and a load that pushes the stage toward the bonding diaphragm are provided inside the vacuum chamber. Table drive structure, etc. The workpiece holding base includes a bonding table that supports the first workpiece, and a workpiece holding structure that supports the second workpiece in a state in which a predetermined gap is interposed between the first workpiece and the first workpiece. When the bonding is performed, the bonding surface of either of the two workpieces is first coated with the adhesive material, and the air in the vacuum chamber is discharged, and the diaphragm is bonded to the diaphragm to be expanded and deformed. The table is pressed against the diaphragm to push the second workpiece to the first workpiece Fit from the center to the periphery.

In the bonding apparatus of the present invention, the vacuum chamber is rotationally moved between a plurality of stages, and different bonding processes are simultaneously performed at the respective stations to improve the productivity of the bonded body, and the bonding apparatus is The following Patent Document 2 proposed by the applicant of the present application is disclosed. In Patent Document 2, the first turntable and the second turntable each having four suction faces are disposed adjacent to each other, and the suction faces are opposed to each other with a predetermined bonding gap therebetween. Each of the first station to the fourth station that performs different bonding processes is provided around the two rotating stages, and each of the rotating stages is rotated by 90 degrees one by one, so that the first workpiece and the second workpiece that are adsorbed on the adsorption surface face each Stand for the bonding process. At each station, the supply of the workpiece and the removal of the bonded workpiece, the separation of the protective paper, the positioning of the two workpieces, and the bonding of the two workpieces are performed.

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Patent No. 5062897 (paragraph numbers 0033 to 0034, FIG. 1)

Patent Document 2: Japanese Laid-Open Patent Publication No. 2011-26143 (paragraph No. 0046 to 0548, FIG. 1)

When the workpiece and the bonding target are bonded together, the adhesive is applied to the surface of the workpiece such as a display panel or the bonding target. However, when the adhesive is applied in an atmospheric environment, it is unavoidable that the adhesive layer is fine. Air bubbles. Therefore, when the workpiece and the bonding target are bonded together in a vacuum environment, the air contained in the adhesive layer is separated from the adhesive layer to generate bubbles on the bonding surface, which is liable to cause a defective defect. Further, during the curing of the adhesive, the solvent contained in the adhesive volatilizes and bubbles form on the bonding surface, which tends to cause defective defects. When the second workpiece is bonded to the peripheral portion from the central portion to the peripheral portion in the vacuum environment as in the bonding apparatus of the above-described Patent Document 1, the bonding surface can be prevented. The generated bubbles are discharged while being extruded from the central portion to the peripheral portion, so that it is possible to suppress the bubbles from remaining on the bonding surface. However, depending on the adhesive, there may be a case where a solvent bubbles are generated during the bonding between the workpiece and the bonding target until the end of the curing, and in particular, since bubbles are easily generated in a vacuum environment, it becomes There is a huge obstacle in seeking to reduce the defective rate of the bonded body.

In the inventor of the present invention, the bonding apparatus that bonds the air bubbles from the central portion to the peripheral portion is used, and the bonding device that newly presses the bonding device is used to find the bonding process in which the bubbles do not remain on the bonding surface. The way. In particular, with regard to the air bubbles generated after the bonding, the inventors of the present invention have finally devised the core of the present invention after studying how to remove the air bubbles and repeatedly try the mistakes, thereby proposing the present invention.

An object of the present invention is to provide a bonding apparatus and a bonding method for a display panel, which can solve the problem that air bubbles are sealed in a bonding surface during bonding, and can also reliably discharge air bubbles generated after bonding. The defect rate of the bonded body can be remarkably lowered to improve the productivity of the bonding industry.

The bonding apparatus of the display panel of the present invention includes a vacuum chamber unit 3 and a vacuum source for discharging air in the vacuum chamber unit 3. The vacuum chamber unit 3 is composed of a chamber body 10 and a chamber cover 11, and a fixed bonding table 12 having a dam auxiliary device 13 is provided inside the chamber body 10, and a movable bonding table is provided in the chamber cover 11. 16. The body aid 13 is provided to seal the large semicircular surface of the display panel P1 to prevent the flow of the adhesive applied to the display panel P1 from spreading, and is exposed unsealed around the display panel P1 that is not in contact with the body aid 13 Part 34. The closed lid body 11 is pressed against the fixed bonding table 12 in a vacuum environment in which the air in the vacuum chamber unit 3 is discharged by a vacuum source, and the bonding object P2 is attached to the display. Panel P1. In a vacuum environment in which the display panel P1 and the bonding object P2 are adhered, the vacuum chamber unit 3 is set up by the chamber tilting device, and the unsealed portion 34 is positioned at the upper end of the display panel P1. The bubbles generated on the bonding surface during the hardening of the agent are degassed from the unsealed portion 34 described above.

The cavity cover 11 is provided with a bonding unit 17 that presses the movable bonding table 16 toward the fixed bonding table 12, and supports the movable bonding table 16 so as to be movable to perform bonding object P2 and assembly. A positioning structure 18 positioned at the display panel P1 of the body aid 13 . In the state in which the chamber cover 11 is opened, the alignment table 22 of the alignment structure 18 is driven by the alignment structure 20 to position the display panel P1 and the bonding object P2.

A plurality of vacuum chamber units 3 along the circumference of the rotating stage 1 The directions are arranged at equal intervals. A preparation station is provided around the rotary stage 1, and the preparation station attaches the display panel P1 and the bonding object P2 to the vacuum chamber unit 3 after taking out the bonded body from the vacuum chamber unit 3, and is a dispenser 5 An adhesive is applied to the display panel P1. The rotary stage 1 is moved forward or reverse in a stage driving configuration, whereby the different vacuum chamber units 3 are faced to the preparation station. The bubble chamber 3, which is not positioned at the preparation station, is set to an inclined posture by the chamber tilting device to degas the bubbles generated on the bonding surface.

As shown in Fig. 2, the three vacuum chamber units 3 are arranged on the rotary stage 1 at equal intervals in the circumferential direction. After the rotary stage 1 is rotated 120 degrees one by one and the two different vacuum chamber units 3 are individually faced to the preparation station, the rotary stage 1 is reversed by 240 degrees to make the remaining vacuum chamber unit 3 face ready. station. In one of the two vacuum chamber units 3 not facing the preparation station, the bonding object P2 is attached to the display panel P1, and the remaining vacuum chamber unit 3 is set to an inclined posture by the chamber tilting device. The bubbles generated by the bonding surface are degassed.

A cover structure 21 that is opened and closed with respect to the chamber body 10 is provided with a positioning structure 18, and a cavity cover 11 is attached to the alignment table 22 of the positioning structure 18. The alignment structure 20 of the drive adjustment alignment table 22 is disposed at the preparation station. The bonding unit 17 includes a plurality of sliders 25 that are fixed to the guide frame 24 of the alignment table 22 and that are guided and supported by the guide frame 24 so as to be movable up and down, and the sliders 25 are oriented toward each other. A driving mechanism that slides up and down and a plurality of bonding shafts 26 that reciprocate along with the movement of the slider 25 in the same direction. The bonding shaft 26 penetrates the inside and the outside of the chamber cover 11, and connects the shaft end thereof to the upper portion of the movable bonding table 16 inside the chamber cover 11. The through hole of the chamber cover 11 and the bonding shaft 26 are sealed by the sealing body 29 so that the air is not ventilated. The chamber cover 11 is closed, and the slider 25 is slidably driven by a driving mechanism in a state where the inside of the vacuum chamber unit 3 is set to a vacuum, as shown in FIGS. 9(a) to (c), so as to be movablely fitted. The stage 16 is inclined so as to be in a non-parallel state with respect to the fixed bonding stage 12, and bonding of the bonding object P2 and the display panel P1 is started. The bonding object P2 and the display panel P1 are bonded together while the inclination angle of the movable bonding table 16 is gradually decreased from the bonding start end to the bonding end.

A heating body 33 that cures the thermosetting adhesive is disposed inside the surrounding body aid 13 .

The display panel P1 is formed in a quadrangular shape, and the surrounding auxiliary members 13 seal the three sides of the periphery, and the unsealed portion 34 is exposed at the remaining side.

In the bonding method of the display panel of the present invention, the display panel P1 housed in the vacuum chamber unit 3 and the table object P2 are bonded together in a vacuum environment. Specifically, the method includes the steps of: opening the chamber cover 11 of the vacuum chamber unit 3, and assembling the display panel P1 to the body aid 13 provided in the fixed bonding table 12 provided inside the chamber body 10, and a step of assembling the bonding object P2 to the movable bonding table 16 disposed inside the cavity cover 11; a step of applying an adhesive to the display panel P1 by the applicator 5; and driving adjustment by the alignment structure 20 for supporting the cavity cover Step of positioning the display panel P1 and the bonding object P2 on the alignment table 22 of 11; closing the chamber cover 11 and pushing the movable bonding table 16 in a vacuum environment in which the air in the vacuum chamber unit 3 has been exhausted Pressing to the fixed bonding table 12 to fit the object P2 is attached to the display panel P1; and the entire vacuum chamber unit 3 is set to an inclined posture by a cavity tilting device, and the bubble generated on the bonding surface is degassed while maintaining a vacuum state. In the step of assembling the display panel P1 to the body auxiliary device 13, the peripheral auxiliary device 13 seals the large semi-circumferential surface of the display panel P1 to prevent the flow of the adhesive applied to the display panel P1 from spreading. The unsealed portion 34 is exposed around the display panel P1 that the body aid 13 contacts. Further, in the step of degassing the air bubbles, the unsealed portion 34 is placed at the upper end of the inclination of the display panel P1, and the air bubbles generated on the bonding surface are discharged from the unsealed portion 34.

In the above-described bonding method, a plurality of vacuum chamber units 3 are disposed on the rotating stage 1, and a preparation station is provided around the rotating stage 1, and the preparation station supplies the display panel P1 and the bonding object P2 to The vacuum chamber unit 3 is taken out from the vacuum chamber unit 3 to complete the bonded body, and an adhesive is applied to the display panel P1. The rotating stage 1 is rotated to a predetermined angle, and the rotating stage 1 is reversed to the rotation angle at the time of forward rotation, so that the vacuum chamber unit 3 is at the preparation station one by one. The bubble chamber 3, which is not positioned at the preparation station, is set to an inclined posture by the chamber tilting device to degas the bubbles generated on the bonding surface.

In the bonding apparatus of the present invention, after the bonding object P2 is bonded to the display panel P1 in a vacuum environment, the vacuum chamber unit 3 is set up in a vacuum environment, and the unsealed portion 34 is placed on the display. The upper end of the panel P1 rises, and the air bubbles generated on the bonding surface during the hardening of the adhesive are degassed from the unsealed portion 34. As described above, the bonding device of the present invention In the vacuum environment, the degassing treatment is performed, so that the volatile gas (gas) and the air bubbles generated after the bonding flow upward along the unhardened adhesive layer and are released from the unsealed portion 34, so There is no room for residual bubbles in the joint surface, and the defect rate of the bonded body can be remarkably lowered to improve the productivity of the bonding industry.

The cavity cover 11 is provided with the bonding unit 17 and the positioning structure 18, and the alignment structure 20 drives the alignment table 22 of the positioning structure 18 to position the display panel P1 and the bonding object P2, so that the cavity cover is not required. The body 11 is provided with a registration structure 20. Therefore, the structure of the chamber cover 11 can be simplified and the weight can be reduced, and the driving load when the vacuum chamber unit 3 is raised can be reduced.

The rotating stage can be mounted in a stage driving structure by arranging a plurality of vacuum chamber units 3 at equal intervals in the circumferential direction of the rotating stage 1 and providing a bonding device for preparing the station in the vicinity of one of the vacuum chamber units 3 1 Forward or reverse movement, whereby different vacuum chamber units 3 face the preparation station. In the vacuum chamber unit 3 facing the preparation station, it is possible to take out the bonded body, assemble the new display panel P1 and the bonding target P2, and apply the adhesive by the applicator 5. Further, in the vacuum chamber unit 3 which is not positioned in the preparation station, the vacuum chamber unit 3 can be set to an inclined posture by the chamber tilting device to deaerate the bubble generated at the bonding surface. Therefore, during the preparation work by the preparation station, the degassing operation can be performed in parallel in the vacuum chamber unit 3 that is not in the preparation station. Therefore, it is possible to carry out a series of cooperation work in a shorter time to further improve the cooperation work. Productive.

According to the arrangement of three vacuum chamber units 3 at equal intervals In the bonding apparatus of the rotating stage 1, the bonding object P2 can be bonded to the display panel P1 while the preparation station performs the preparation work, and the vacuum chamber unit 3 is set to the inclined posture by the cavity tilting device. The bubbles generated on the mating surface are degassed. As described above, when the preparatory work, the labeling cooperation, and the degassing operation are simultaneously performed in parallel, it is possible to carry out a series of posting cooperation in a shorter time to further improve the productivity of the bonding industry. Further, after the rotary stage 1 is rotated 120 degrees in succession, the rotary stage 1 is reversed by 240 degrees, and the three vacuum chamber units 3 are respectively attached to the preparation station, the bonding station, and the degassing station for bonding processing. Therefore, the structure of the stage driving structure, the wiring structure, and the piping structure can be simplified, and the overall cost of the bonding apparatus can be reduced.

The positioning device 18 is provided on the cover support frame 21, and the cavity cover 11 is attached to the alignment table 22 of the registration device 18 in order to attach the bonding object P2 attached to the movable bonding table 16 together with the cavity cover 11 The movement is adjusted together to perform alignment with respect to the display panel P1. Further, the guide frame 24 fixed to the table 22, the plurality of sliders 25 guided and guided by the guide frame 24, and the drive mechanism of each of the sliders 25 and the plurality of sliders 25 act together The bonding unit 17 is bonded to the bonding shaft 26 in order to bond the bonding target P2 with respect to the display panel P1. In detail, the bonding of the bonding object P2 and the display panel P1 is started in a state where the movable bonding table 16 is inclined so as not to be parallel to the fixed bonding table 12. In addition, the bonding object P2 and the display panel P1 are bonded together while the inclination angle of the movable bonding table 16 is gradually decreased from the bonding start end to the bonding end. As described above, the bonding object P2 is attached to the display panel while the inclination of the movable bonding table 16 is gradually decreased from the bonding start end to the bonding end. In the case of P1, it is possible to bond the fine air contained in the adhesive to the bonding end, and it is possible to solve the problem that air bubbles are sealed in the bonding surface at the time of bonding.

When the heating body 33 is disposed inside the surrounding body assisting device 13, the hardening agent for adhering the bonding object P2 to the display panel P1 can be accelerated to shorten the time required for the degassing process. Further, after the adhesive close to the side of the body aid 13 is hardened, the hardening can be promoted toward the central portion of the display panel P1 far from the body aid 13, so that the volatile gas and air generated after the bonding can be made. The air bubbles are effectively released toward the unsealed portion 34.

In the display panel P1 formed in a quadrangular shape, when the surrounding auxiliary members 13 seal the three sides of the periphery and the unsealed portion 34 is exposed at the remaining side portions, the structure of the surrounding body aid 13 can be simplified. Cut its manufacturing costs. This is because the dedicated enclosure assisting device 13 must be prepared in accordance with the difference in outer shape and size of the display panel P1, and the bracket assisting member 13 cannot be shared.

The bonding method of the display panel according to the present invention is a step of assembling the display panel P1 and the bonding object P2 to a predetermined position, a step of applying an adhesive by the applicator 5, and a step of positioning the alignment device 18, The bonding body is obtained by attaching the bonding object P2 to the display panel P1 in a vacuum environment, and setting the vacuum chamber unit 3 to a position to degas the bubbles generated on the bonding surface. Further, in the step of degassing the air bubbles, the unsealed portion 34 is placed at the rising upper end of the display panel P1, and the air bubbles generated on the bonding surface are discharged from the unsealed portion 34. According to the above According to the bonding method, the volatile gas and the air bubbles generated after the bonding can flow upward along the unhardened adhesive layer and are released from the unsealed portion 34. Therefore, there is no room for residual bubbles on the bonding surface. The defect rate of the bonded body is remarkably lowered to improve the productivity of the bonding industry.

In the above-described bonding method, when a plurality of vacuum chamber units 3 are disposed on the rotary stage 1, and a preparation station is provided around the rotary stage 1, and the preparation operation and the degassing operation of the air bubbles are performed in parallel, it is possible to In a shorter period of time, a series of stickers will be carried out to further enhance the productivity of the cooperation industry. In detail, it is possible to take out the bonded body of the vacuum chamber unit 3 facing the preparation station, assemble the new display panel P1 and the bonding target P2, and apply the adhesive by the applicator 5. At the same time, in the vacuum chamber unit 3 which is not in the preparation station, the vacuum chamber unit 3 can be set in an inclined posture to degas the bubbles generated on the bonding surface. Therefore, a series of stickers can be carried out in a shorter period of time, thereby further improving the productivity of the cooperation industry.

1‧‧‧Rotary stage

2‧‧‧rail

3‧‧‧vacuum chamber unit

4‧‧‧Workroom

5‧‧‧applicator

6‧‧‧CCD camera

7‧‧‧ center axis

10‧‧‧ cavity body

11‧‧‧cavity

12‧‧‧Fixed fitting table

13‧‧‧ Peripheral aids

14‧‧‧Shake axis

15‧‧‧Motor

16‧‧‧ movable mating table

17‧‧‧Fitting unit

18‧‧‧ Positioning structure

19‧‧‧ Sealing ring (sealing body)

20‧‧‧ alignment structure

21‧‧‧Cover support frame

22‧‧‧Alignment table

23‧‧‧Drive shaft

24‧‧‧Guide frame

25‧‧‧ Slider

26‧‧‧ affixed shaft

27‧‧‧Support frame

28‧‧ ‧ sales

29‧‧‧ Sealing body

30‧‧‧ long holes

33‧‧‧heating body (heater)

34‧‧‧Unsealed

35‧‧‧ tilting shaft

36‧‧‧ tilting motor

37‧‧‧ drive gear

38‧‧‧ driven gear

39‧‧‧ Roll

40‧‧‧ bracket

43‧‧‧Locks

P1‧‧‧ display panel

P2‧‧‧ compliant objects

Fig. 1 is a vertical sectional view showing the vacuum chamber unit of the present invention in a degassing posture.

Fig. 2 is a plan view showing the whole of the bonding apparatus of the present invention.

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 2.

Figure 4 is a plan view of the cavity body and the body aid.

Figure 5 is a vertical cross-sectional front view showing the state in which the chamber cover is closed.

Fig. 6 is a cross-sectional view taken along line B-B of Fig. 5.

Fig. 7 is a view of the arrow direction of Fig. 2;

Figure 8 is a schematic partial cross-sectional side view showing the alignment device.

Fig. 9 (a) to (c) are explanatory diagrams of the operation of the bonding unit.

Fig. 10 (a) to (d) are explanatory views showing the rotation operation of the bonding apparatus.

(Embodiment 1) Figs. 1 to 10 show an embodiment of a bonding apparatus (hereinafter simply referred to as a bonding apparatus) of a display panel of the present invention. In the second drawing, the bonding apparatus is configured such that a central rotating stage 1 and a ring-shaped guide rail 2 arranged concentrically with the rotating stage 1 are used as a base. The three vacuum chamber units 3 are arranged at equal intervals (120 degrees) in the circumferential direction of the rotary stage 1, and the machines are housed in a cubic working chamber 4. Although not illustrated, a vacuum source for discharging the air in the vacuum chamber unit 3 is disposed in the lower half of the work chamber 4, and an adhesive is applied to the display panel P1 in the front upper portion of the work chamber 4. The applicator 5 and a CCD (Charge Coupled Device) camera 6 for the alignment device 18 (see FIG. 3). The rotary stage 1 is rotatable together with the center shaft 7, and is driven in forward rotation or reverse rotation by a stage driving device (stage driving structure) (not shown).

In the third drawing, the vacuum chamber unit 3 is constituted by a hollow box-shaped chamber body 10 that opens upward, and a chamber lid body 11 that closes the upper opening of the chamber body 10 so as to be openable and closable. A fixed bonding table 12 is disposed inside the cavity body 10, and a surface is fixed on the upper surface of the fixing bonding table 12. Body aid 13. The chamber cover 11 is coupled to the chamber body 10 so as to be swingably opened and closed by the rocking shaft 14, and a motor 15 for rotationally driving the rocking shaft 14 is attached to the shaft end of the rocking shaft 14. The movable bonding table 16 is disposed corresponding to the fixed bonding table 12 on the lid surface of the chamber lid body 11 (the side opposite to the fixed bonding table 12 in a state where the chamber lid body 11 is closed). Further, in the outer cover surface of the chamber lid body 11 (on the upper surface side in a state where the chamber lid body 11 is closed), a bonding unit 17 that presses the movable bonding table 16 toward the fixed bonding table 12 is provided. And a positioning device that performs positioning of the display panel P1 and the bonding object P2. The display panel P is composed of a quadrangular liquid crystal panel, and is fitted and mounted to the surrounding body aid 13. The bonding object P2 is composed of a touch panel having the same shape and the same size as the liquid crystal panel. A seal ring (sealing body) 19 is disposed at an upper end of the opening peripheral wall of the chamber body 10.

A pair of cover holders 21 are fixed to the rocking shaft 14, and the positioning structure 18 is provided on the cover holders 21, and the chamber cover 11 is fixed to the positioning table 22 of the positioning structure 18 (see Fig. 5). The registration device is constituted by the aforementioned positioning structure 18 and the alignment structure 20 provided at the preparation station. The positioning structure 18 is provided with a positioning table 22 that can slide forward and backward and left and right. The alignment structure 20 reads the image information (position information) output from the CCD camera 6 described above, and confirms the positional shift state of the bonding object P2 with the position of the display panel P1 as the reference position, and determines that it should be adjusted. After the direction of movement and the amount of movement, as shown by the imaginary line of Fig. 8, the drive shaft 23 is coupled to the driven shaft of the table 22 to drive the adjustment of the table 22 to adjust the position of the chamber cover 11. In addition, although not illustrated, in order to restrict the movement of the table 22 after adjusting the position, the positioning structure 18 is provided with a stop. A brake that moves the counter table 22. Although the confirmation of the positional shift state and the adjustment movement of the alignment table 22 are performed plural times, the position adjustment is completed in a few seconds. As described above, when the alignment structure 20 is provided at the preparation station, it is not necessary to provide the alignment structure 20 in each vacuum chamber unit 3. Therefore, the structure of the chamber cover 11 can be simplified and the weight can be reduced, and the driving load when the vacuum chamber unit 3 is raised can be reduced.

The bonding unit 17 is a plurality of sliders 25 that are fixed to the guide frame 24 of the alignment table 22 and that are guided and supported by the guide frame 24 so as to be movable up and down, and slide the sliders 25 upward and downward. A drive mechanism (not shown) and a plurality of aligning shafts 26 and the like that move reciprocally with the movement of the slider 25 in parallel with the movement of the slider 25 are performed. The bonding shaft 26 is disposed in four places to penetrate the inside and the outside of the chamber cover 11, and the lower end thereof is coupled to the support frame 27 fixed to the movable bonding table 16 by a pin 28. The through hole of the chamber cover 11 and the bonding shaft 26 are sealed by the sealing body 29 so that the air is not ventilated. Although the bonding shaft 26 on the right side in FIG. 5 is connected to the support frame 27 by the pin 28 alone, the bonding shaft 26 facing the left side in FIG. 5 is coupled to the support frame 27 through the pin 28 and the long hole 30. This is to attach the bonding object P2 attached to the movable bonding table 16 to the display panel P1 in an inclined state.

As shown in Fig. 3, the applicator 5 is supported by three rodless cylinders 44 to 46 which are reciprocally driven in the X-axis, Y-axis, and Z-axis directions, and can coat the adhesive in an arbitrary pattern. Attached to the display panel P1 mounted on the body aid 13 . The subsequent agent is composed of a silicone-based two-component thermosetting adhesive. As shown in Fig. 4, the body aid 13 is made of a U-shaped rubber surrounding the three sides of the display panel P1. In the frame structure, a heater (heating body) 33 that promotes curing of the adhesive is disposed inside. The body aid 13 is provided to prevent diffusion of the adhesive flow applied to the display panel P1. The unsealed portion 34 is exposed around the panel that is not in contact with the body aid 13 (around the display panel P1). The thickness of the body aid 13 is set to be slightly larger than the total thickness of the display panel P1 and the adhesive layer, but is set to be smaller than the total thickness when the bonding object P2 is bonded to the display panel P1 through the adhesive layer (refer to Figure 1).

A chamber tilting device for erecting the vacuum chamber unit 3 from the horizontal bonding posture in a state of being tilted in the whole is provided. In FIGS. 4 and 7, the chamber tilting device is tilted by a pair of tilting shafts 35 that are fixed to the opposing wall faces of the cavity body 10 along an axis parallel to the rocking shaft 14, and that rotationally drives the tilting shaft 35. The motor 36 is configured to reduce the rotational power of the tilt motor 36 and transmit it to the drive gear 37 and the driven gear 38 of the tilt shaft 35, and a roller 39 attached to the tilt shaft 35 that intersects the guide rail 2. The component symbol 40 is a pair of brackets that pivotally tilt the shaft 35 so that the tilting shaft 35 is rotatable, and the vacuum chamber unit 3 is supported by the two brackets 40 and 39. In a state in which the vacuum chamber unit 3 is raised by the chamber tilting device, as shown in Fig. 1, the unsealed portion 34 described above is tied to the inclined upper end of the display panel P1. The rising angle of the vacuum chamber unit 3 is preferably selected in the range of 30 to 80 degrees. This is because when the rising angle is too large, there is a possibility that the display panel P1 or the bonding object P2 is forced to weaken the original function. However, for the display panel P1 and the bonding object P2 which are not covered as described above, the rising angle can be set to 90 degrees to release the air bubbles.

The vacuum chamber unit 3 constructed as described above is in a position A series of bonding processes are performed at the preparation station, the bonding station, and the degassing station on the front of the laboratory 4. The bonding station is located at a position where the rotating stage 1 is rotated 120 degrees from the preparation station to the counterclockwise direction, and the degassing station is positioned to rotate the rotating stage 1 from the bonding station to the counterclockwise direction and then forward to 120 degrees. The location of the degree.

As shown in Fig. 2, in the preparation station, the chamber cover 11 is opened, and the bonded body that has completed the bonding process is taken out from the body aid 13. Next, the new display panel P1 is attached to the body aid 13 and the bonding object P2 is attached to the movable bonding table 16. Next, the rodless cylinders 44 to 46 and the applicator 5 are actuated to apply the adhesive to the upper surface of the display panel P1 in a predetermined pattern. In this state, the registration device 18 is actuated, and the positioning of the bonding object P2 and the display panel P1 is performed based on the image information of the CCD camera 6, and the chamber cover 11 is closed. The attachment of the bonded body that has been subjected to the bonding process and the assembly of the display panel P1 and the bonding target P2 can be performed by either an industrial robot or a human hand.

At the bonding station, after the chamber cover 11 is closed and joined to the chamber body 10, as shown in Fig. 7, the chamber cover 11 is locked by the lock member 43 provided in the chamber body 10. turn on. Next, after the inside of the vacuum chamber unit 3 is brought into a vacuum state, the bonding unit 17 is actuated, and the movable bonding table 16 is pressed against the fixed bonding table 12 to bond the bonding object P2 to the display panel P1. Further, in the degassing station, the chamber tilting device is actuated while maintaining the vacuum state, and the vacuum chamber unit 3 that has finished the bonding process is set in an inclined posture, and the air bubbles generated on the bonding surface are removed from the unsealed portion 34. gas. The time required for degassing is about 20 seconds. When the vacuum state is released and the inside of the vacuum chamber unit 3 is changed to the same state as the surrounding air pressure, the cavity is provided. The cover 11 is separated from the cavity body 10. In order to prevent the separation of the chamber cover 11 as described above, the chamber cover 11 is locked by the lock 43.

A series of bonding treatments are performed by rotating the rotating stage 1 twice by 120 degrees and making the two different vacuum chamber units 3 face the preparation station, and then rotating the rotating stage 1 by 240 degrees to make the remaining The vacuum chamber unit 3 is facing the preparation station. As shown in Fig. 10(a) to Fig. 10(d), the positions of the three vacuum chamber units 3 are different when the rotary stage 1 is rotated forward by 120 degrees each time. By rotating the rotary stage 1 by 240 degrees, the three vacuum chamber units 3 can be returned to the initial state.

The bonding of the bonding stations is carried out as shown in Fig. 9 (a) to (c). First, as shown in Fig. 9(a), the pair of bonding shafts 26 on the side close to the rocking shaft 14 are lowered in a vacuum environment, and the movable bonding table 16 and the bonding target P2 are inclined. At this time, the inclined upper end of the bonding object P2 is in a vertically corresponding relationship with the unsealed portion 34 of the display panel P1. Next, as shown in FIG. 9(b), the four bonding shafts 26 are simultaneously lowered, and the inclined lower end edge of the bonding object P2 is pressed against the display panel P1. In other words, the bonding of the bonding object P2 and the display panel P1 is started in a state where the movable bonding table 16 is inclined so as not to be parallel to the fixed bonding table 12.

Then, as shown in Fig. 9(c), the two bonding shafts 26 on the side of the inclined upper end edge of the support bonding object P2 are gradually lowered, and the inclination of the movable bonding table 16 is made from the bonding start end. The bonding object P2 is attached to the display panel P1 while the bonding end is gradually smaller. The trajectory difference of the pin 28 at this time is absorbed by the long hole 30. Finally, the movable bonding table 16 is pressed against the fixed bonding table 12 by the four bonding shafts 26, and the bonding object P2 and the display panel are brought together. The entire surface of P1 is in close contact through the adhesive layer. As described above, when the bonding target P2 is bonded to the display panel P1 while the inclination of the movable bonding table 16 is gradually decreased from the bonding start end to the bonding end, the fineness of the adhesive can be made. Since the air is bonded to the bonding end and bonded, it is possible to solve the problem that air bubbles are sealed in the bonding surface at the time of bonding.

In the degassing station, as shown in Fig. 1, the vacuum chamber unit 3 is tilted by the chamber tilting device, and the unsealed portion 34 is tied to the inclined upper end (upright end) of the display panel P1. Further, the inside of the vacuum chamber unit 3 is maintained in a vacuum state, and the adhesive is heated by the heater 33 embedded in the body assisting device 13, and is hardened from the side close to the body assisting device 13. Therefore, even if the volatilizing gas of the solvent contained in the adhesive and the air contained in the adhesive layer merge to form a bubble block as the adhesive hardens, the bubble block flows upward in the adhesive layer which has not yet hardened. Unreleased from the unsealed portion 34. As described above, when the degassing treatment is performed in a state where the unsealed portion 34 is positioned at the inclined upper end of the display panel P1 in a vacuum environment, the volatile gas and the air bubbles generated after the bonding can be quickly and surely unsealed. Since the portion 34 is discharged, the defective ratio of the bonded body can be remarkably lowered to improve the productivity of the bonding industry.

In the bonding method of the display panel of the present invention, it can be bonded in the following manner using the above-described bonding apparatus.

In the bonding method of the display panel of the present invention, the display panel P1 housed in the vacuum chamber unit 3 and the bonding object P2 are bonded together in a vacuum environment. Specifically, the method has the following steps: opening the chamber cover 11 of the vacuum chamber unit 3, and assembling the display panel P1 to be disposed inside the chamber body 10 The fixing aid 13 of the fixing bonding table 12 is fixed, and the bonding object P2 is assembled to the movable bonding table 16 provided inside the cavity cover 11; the adhesive is applied to the display panel by the applicator 5 Step of P1; step of positioning the display panel P1 and the bonding object P2 by adjusting the alignment table 22 for supporting the cavity cover 11 by the alignment structure 20; closing the cavity cover 11 in the vacuum chamber unit 3, in the vacuum environment in which the air is discharged, the movable bonding table 16 is pressed to the fixed bonding table 12 to attach the bonding object P2 to the display panel P1; and the entire vacuum chamber unit 3 is tilted by the cavity In the inclined posture, the bubble generated on the bonding surface is degassed while maintaining the vacuum state. In the step of assembling the display panel P1 to the body auxiliary device 13, the peripheral auxiliary device 13 seals the large semi-circumferential surface of the display panel P1 to prevent the flow of the adhesive applied to the display panel P1 from spreading, and The unsealed portion 34 is exposed around the display panel P1 that the peripheral aid 13 contacts. In the step of degassing the air bubbles, the unsealed portion 34 is placed at the upper end of the inclination of the display panel P1, and the air bubbles generated on the bonding surface are discharged from the unsealed portion 34.

In the above-described bonding method, a plurality of vacuum chamber units 3 are disposed on the rotating stage 1, and a preparation station is provided around the rotating stage 1, and the preparation station supplies the display panel P1 and the bonding object P2 to The vacuum chamber unit 3 is taken out from the vacuum chamber unit 3 to complete the bonded body, and an adhesive is applied to the display panel P1. The rotating stage 1 is rotated to a predetermined angle, and the rotating stage 1 is reversed to the rotation angle at the time of forward rotation, so that the vacuum chamber unit 3 is at the preparation station one by one. Taking the vacuum chamber unit 3 not at the preparation station into an inclined posture by the chamber tilting device to remove the bubbles generated on the bonding surface gas.

In the above-described embodiment, the preparation station, the bonding station, and the deaeration station are provided around the rotary stage 1, but this is not necessary. For example, two vacuum chamber units 3 can be disposed at opposite positions around the rotating stage 1, and after the vacuum chamber unit 3 is rotated forward by 180 degrees, the reverse movement is up to 180 degrees, and a series of bonding is performed. deal with. At this time, it is preferable to provide a preparation station for one of the relative positions around the rotary stage 1, and to provide a station for bonding and degassing the other. Similarly, the vacuum chamber unit 3 can be disposed at four places around the rotary stage 1 while performing a series of bonding processes.

The heating body 33 may be a heat source other than the heater or may be disposed on the fixed bonding table 12. Further, the heating body 33 can be disposed in parallel from the unsealed portion 34 at the position farthest from the unsealed portion 34 of the fixed bonding table 12, and the heating body 33 disposed at the position farthest from the unsealed portion 34 toward the unheated portion 33 The side of the sealing portion 34 sequentially causes the heating body 33 to operate to degas. The body aid 13 can be formed into a polygonal shape and a circular shape in accordance with the outer shape of the display panel P1, but it is preferable to provide an open portion for forming the unsealed portion 34 in a part thereof. The forward rotation direction when the rotary stage 1 is rotated may also be a clockwise rotation direction. The diameter of the rotary stage 1 can be increased, and a plurality of vacuum chamber units 3 are disposed thereon. At this time, it is preferable that a tilting window that allows the tilting of the vacuum chamber unit 3 is provided on the stage surface facing the vacuum chamber unit 3. In the above-described embodiment, the vacuum chamber unit 3 is supported from both sides by the rotary stage 1 and the guide rail 2. However, the guide rail 2 and the roller 39 may be omitted and supported from one side.

3‧‧‧vacuum chamber unit

10‧‧‧ cavity body

11‧‧‧cavity

12‧‧‧Fixed fitting table

13‧‧‧ Peripheral aids

16‧‧‧ movable mating table

19‧‧‧ Sealing ring (sealing body)

24‧‧‧Guide frame

25‧‧‧ Slider

26‧‧‧ affixed shaft

27‧‧‧Support frame

28‧‧ ‧ sales

29‧‧‧ Sealing body

30‧‧‧ long holes

33‧‧‧heating body (heater)

34‧‧‧Unsealed

35‧‧‧ tilting shaft

P1‧‧‧ display panel

P2‧‧‧ compliant objects

Claims (9)

A sealing device for a display panel, comprising: a vacuum chamber unit (3), and a vacuum source for discharging air in the vacuum chamber unit (3); the vacuum chamber unit (3) is a chamber body (10) and a chamber cover The body (11) is configured such that a fixed bonding table (12) including a body aid (13) is provided in the cavity body (10), and a movable bonding table (16) is provided in the cavity cover body (11); The auxiliary device (13) is provided to seal the large semicircular surface of the display panel (P1) to prevent the flow of the adhesive applied to the display panel (P1) from diffusing, and the display panel that is not in contact with the peripheral aid (13) An unsealed portion (34) is exposed around (P1); the chamber cover (11) is closed, and the movable bonding table (16) is placed in a vacuum environment in which the air in the vacuum chamber unit (3) is discharged by a vacuum source. Pressing the bonding object (P2) against the fixed bonding table (12) and bonding the bonding object (P2) to the display panel (P1); while maintaining the vacuum environment of the bonding display panel (P1) and the bonding object (P2), The chamber tilting device sets the vacuum chamber unit (3) to a posture in which the unsealed portion (34) is positioned at the upper end of the display panel (P1), and the air bubbles generated on the bonding surface during the hardening of the adhesive are The foregoing The unsealed portion (34) is degassed. The bonding apparatus of the display panel according to the first aspect of the invention, wherein the chamber lid body (11) is provided with a fitting for pressing the movable bonding table (16) toward the fixing bonding table (12). The unit (17) and the movable bonding table (16) are movably supported to perform the bonding object (P2) and assembly a positioning structure (18) positioned at the display panel (P1) of the body aid (13); in a state in which the chamber cover (11) is opened, the alignment structure (18) is driven by the alignment structure (20) The positioning of the display panel (P1) and the bonding object (P2) is performed on the registration table (22). The bonding device of the display panel according to the first or the second aspect of the invention, wherein the plurality of vacuum chamber units (3) are arranged at equal intervals along the circumferential direction of the rotating stage (1); A preparation station is provided around the table (1), and the preparation station is configured to assemble the display panel (P1) and the bonding object (P2) to the vacuum chamber unit (3) after the bonding body is taken out from the vacuum chamber unit (3), and The adhesive is applied to the display panel (P1) by the applicator (5); the rotary stage (1) is rotated forward or reversely in the stage driving configuration, thereby making the different vacuum chamber units (3) face Preparing the station; the chamber chamber (3), which is not at the preparation station, is set to an inclined posture by the chamber tilting device to degas the bubbles generated at the bonding surface. The bonding device for a display panel according to claim 3, wherein three vacuum chamber units (3) are arranged at equal intervals in the circumferential direction of the rotary stage (1); After successively rotating 120 degrees and making the two different vacuum chamber units (3) face the preparation station individually, the rotating stage (1) is reversed by 240 degrees and the remaining vacuum chamber unit (3) faces the preparation station. One of the two vacuum chamber units (3) not facing the preparation station, the bonding object (P2) is attached to the display panel (P1), and the chamber is tilted The apparatus sets the remaining vacuum chamber unit (3) in an inclined posture to degas the bubbles generated on the bonding surface. The bonding device of the display panel according to the fourth aspect of the invention, wherein the cover support frame (21) that is opened and closed with respect to the cavity body (10) is provided with a positioning structure (18), and the positioning structure (18) The alignment table (22) is equipped with a cavity cover body (11); a alignment structure (20) for driving the adjustment alignment table (22) is arranged at the preparation station; and the bonding unit (17) is provided with: fixed in the alignment position The guide frame (24) of the table (22) is guided by the guide frame (24) so as to be vertically movable to guide the plurality of sliders (25), and the sliders (25) are driven to slide up and down. a driving mechanism and a plurality of bonding shafts (26) that reciprocately slide with the movement of the slider (25); the bonding shaft (26) penetrates the inside and the outside of the chamber cover (11), and the shaft end thereof The inside of the cavity cover body (11) is connected to the upper portion of the movable bonding table (16); the through hole of the cavity cover body (11) and the bonding shaft (26) are sealed by the sealing body (29) so as to be incapable of aeration; The chamber cover body (11) is closed, and the slider (25) is slidably driven by a driving mechanism in a state where the vacuum chamber unit (3) is vacuumed to tilt the movable bonding table (16) relative to the fixed portion. The fitting table (12) is opened in a non-parallel state The bonding object (P2) and the display panel (P1) are bonded together, and the bonding object (P2) is bonded while the inclination angle of the movable bonding table (16) is gradually decreased from the bonding start end to the bonding end. The display panel (P1) is fitted. A bonding apparatus for a display panel according to the first or second aspect of the invention, wherein a heating body (33) for curing the thermosetting adhesive is disposed inside the surrounding auxiliary device (13). The bonding device of the display panel according to the first or the second aspect of the invention, wherein the display panel (P1) is formed in a quadrangular shape, and the three sides of the surrounding area are sealed by the surrounding auxiliary device (13). The sealing portion (34) is exposed at the remaining side. A method for bonding a display panel, wherein a display panel (P1) housed in a vacuum chamber unit (3) and a bonding object (P2) are attached in a vacuum environment, and the bonding method of the display panel is provided The following steps: opening the chamber cover (11) of the vacuum chamber unit (3), assembling the display panel (P1) to the enclosure assisted by the fixed bonding table (12) disposed inside the chamber body (10) (13), and assembling the bonding object (P2) to the movable bonding table (16) disposed inside the chamber cover (11); applying the adhesive to the display panel with the applicator (5) (P1) a step of positioning the display panel (P1) and the bonding object (P2) by adjusting the alignment table (22) for supporting the cavity cover (11) by the alignment structure (20); closing the cavity The lid body (11) pushes the movable bonding table (16) to the fixed bonding table (12) in a vacuum environment in which the air in the vacuum chamber unit (3) is discharged, and the bonding object (P2) is attached. a step of bonding to the display panel (P1); and stepping the entire vacuum chamber unit (3) in an inclined posture by a chamber tilting device to degas the bubbles generated on the bonding surface while maintaining a vacuum state; In the step of assembling the display panel (P1) to the body aid (13), the peripheral auxiliary device (13) is used to seal the large semi-circumferential surface of the display panel (P1) to prevent application to the display panel (P1). The flow of the subsequent agent is diffused, and the unsealed portion (34) is exposed around the display panel (P1) that is not in contact with the body aid (13); in the step of degassing the bubble, the unsealed portion (34) is sealed. ) is located at the inclined upper end of the display panel (P1), and discharges air bubbles generated on the bonding surface from the unsealed portion (34). The method of bonding a display panel according to claim 8, wherein a plurality of vacuum chamber units (3) are disposed on the rotating stage (1), and a preparation station is disposed around the rotating stage (1). The preparation station supplies the display panel (P1) and the bonding object (P2) to the vacuum chamber unit (3), and removes the bonded body from the vacuum chamber unit (3), and applies the adhesive to the display panel. (P1); let the rotating stage (1) rotate to a predetermined angle, and then rotate the rotating stage (1) to the rotation angle of the forward rotation, so that the vacuum chamber unit (3) is at the preparation station one by one; The apparatus sets the vacuum chamber unit (3) not at the preparation station to an inclined posture to degas the bubbles generated on the bonding surface.