TWI594047B - Cutting device for display panel and manufacturing method of display device using the same - Google Patents

Description

Cutting device for display panel and method for manufacturing display device therewith

The technique is generally directed to a cutting device for a display panel. More specifically, the techniques are generally directed to a cutting apparatus for cutting a flexible display panel and a method of manufacturing the same using the same.

Flat panel displays, liquid crystal displays (LCDs), and organic light emitting diode displays (OLEDs) are conventional. Among them, unlike the liquid crystal display, the self-luminous type organic light emitting diode display does not require a backlight, so that its thickness and weight can be reduced.

In addition, when the pixel circuit and the organic light emitting diode are disposed on a flexible substrate such as a polymer film instead of a rigid substrate, the organic light emitting diode display may have a bending property. A barrier layer and a buffer layer including a plurality of inorganic layers (cerium oxide, tantalum nitride, etc.) are disposed between the flexible substrate and the pixel circuit.

The display panel is initially manufactured in the shape of a mother substrate including a plurality of unit cells (one unit cell corresponding to one display panel), and then divided into individual display panels. A flexible display panel comprising a polymeric film is cut by using a downwardly moving cutting knife.

However, when the cutting blade enters the flexible display panel, there is a force that pushes the layer horizontally on both sides of the cutting blade. Therefore, cracks are generated in the inorganic layer near the surface of the slit, that is, the barrier layer and the buffer layer, and shrinkage defects are generated in the display panel due to the crack.

The above information disclosed in the prior art is only used to enhance the understanding of the technical background, and thus it may contain information of prior art known to those of ordinary skill in the art.

The present invention provides a cutting device for a display panel to prevent shrinkage defects of a slit surface when cutting a flexible display panel, and a method of manufacturing a display device using the same.

A cutting device for a display panel according to an exemplary embodiment includes: a display panel that receives a mother substrate by an adsorption method to support a display panel and a curved display panel to apply a pulling force to a stage of the display panel; and when relative to the load The cutting blade of the display panel is cut when the table is reciprocating.

The stage can be formed in a cylindrical shape and can be coupled to the stage drive for rotation.

The stage may include: an inner tube forming a plurality of first openings; a tube surrounding the inner tube and forming a plurality of second openings; and a plurality of first openings and a plurality of numbers respectively connected between the inner tube and the outer tube a plurality of connecting tubes of two openings. The plurality of first openings and the plurality of second openings may correspond to each other one-to-one and face-to-face according to a radial direction of the stage.

The stage drive may include: a drive motor; a drive gear coupled to the drive motor; and a vertical motion gear formed according to a circumferential direction of the outer tube and engaging the drive gear.

The cutting device for the display panel may further comprise a vacuum suction portion mounted on one side of the inner tube and providing vacuum pressure to the inner tube, and an air mounted on the other side inside the inner tube and blowing compressed air toward the inner tube Release department.

The cutting device may further comprise a pair of supports coupled to the end of the inner tube via a bearing, and the vacuum suction portion and the air release portion may be fixed and mounted to separate the inner tube between the pair of supports.

The vacuum adsorption portion may include: a first body facing a portion of the inner tube and forming a plurality of first slits; a vacuum pump generating a vacuum pressure; and a first connecting tube connecting the inside of the first body and the vacuum pump. The first body may be formed as a semi-cylindrical body and disposed toward the cutting blade, and a plurality of first slits may be formed on a curved surface facing the inner tube.

The air release portion may include: a second body facing a portion of the inner tube and forming a plurality of second slits; an air pump that releases compressed air; and a second connecting tube connecting the interior of the second body and the air pump. The second body may be formed as a quarter cylinder and disposed toward the display panel in the stage after cutting, and may form a plurality of second slits on a curved surface facing the inner tube.

The cutting device for the display panel may further include: receiving and transmitting the display panel of the mother substrate to the first transfer portion of the stage; and receiving and transmitting the cut display panel from the loading stage to the second process of the next process Transfer department. The first transfer portion and the second transfer portion may be located on one side with respect to the vacuum suction portion via the stage, and the air release portion may be disposed toward the second transfer portion.

A manufacturing method of a display device according to an exemplary embodiment includes: transmitting a display panel in a mother substrate to a rotating cylindrical shaped stage; adsorbing the display panel to the stage by using vacuum pressure, and bending the display panel into and out The same curvature of the table to apply tension to the display a display panel; cutting the display panel by using a cutting blade; and blowing compressed air to the cut display panel to separate the cut display panel from the stage.

The display panel of the mother substrate may be a flexible display panel, and may include a plurality of unit cells arranged according to the first direction and the second direction intersecting the first direction. The display panel of the mother substrate may be divided into strips according to a first cutting line parallel to the first direction, wherein a plurality of unit cells are formed in one direction, and the strip display panel may be parallel to the second direction The two cutting lines are cut into individual display panels.

By cutting the display panel by applying a pulling force, the slit surface of the display panel is easily opened after being pierced by the cutting blade. Therefore, the force of pushing the layers in the horizontal direction of each side of the cutting blade by the piercing of the cutting blade does not occur, so that the crack of the barrier layer and the buffer layer made of a plurality of inorganic layers can be prevented. .

10‧‧‧First Transfer Department

20‧‧‧ stage

21‧‧‧ first opening

22‧‧‧Inside

23‧‧‧second opening

24‧‧‧External management

25‧‧‧Connecting tube

31‧‧‧ cutting knife

32‧‧‧Cut drive

40‧‧‧Second Transfer Department

50‧‧‧ display panel

51‧‧‧Flexible substrate

52‧‧‧ barrier layer

53‧‧‧buffer layer

54‧‧‧pixel circuit

55‧‧‧Organic light-emitting diode layer

56‧‧‧film encapsulation layer

57‧‧‧Under protective film

58‧‧‧Upper protective film

60‧‧‧stage drive

61‧‧‧Drive motor

62‧‧‧ drive gear

63‧‧‧Vertical motion gear

65‧‧‧Support

66‧‧‧ bearing

70‧‧‧vacuum adsorption department

71‧‧‧first slit

72‧‧‧ first subject

73‧‧‧vacuum pump

74‧‧‧First connecting pipe

80‧‧ Air Release Department

81‧‧‧Second slit

82‧‧‧Second subject

83‧‧‧Air pump

84‧‧‧Second connection tube

100‧‧‧ cutting device

501‧‧‧ display panel

541‧‧‧Drive film transistor

551‧‧‧Organic Luminescent Diodes

552‧‧‧pixel electrode

553‧‧‧Organic light-emitting layer

554‧‧‧Common electrode

CL1‧‧‧ first cutting line

CL2‧‧‧second cutting line

S10~S40‧‧‧Steps

1 is a schematic view of a cutting device for a display panel in accordance with an exemplary embodiment.

Figure 2 is a perspective view of a portion of the cutting device shown in Figure 1.

Figure 3 is a cross-sectional view of the stage shown in Figure 2.

Figure 4 is a perspective view of the interior of the stage shown in Figure 2.

Fig. 5 is a perspective view of the vacuum suction portion as viewed in the direction A of Fig. 4.

Fig. 6 is a cross-sectional view showing the vacuum adsorption unit and the air release unit shown in Fig. 4.

Figure 7 is an enlarged cross-sectional view of the display panel in the cutting process.

Fig. 8 is a view showing the cutting process of the display panel using the cutting device of the comparative example.

Figure 9 is a process flow diagram of a method of fabricating a display device in accordance with an exemplary embodiment.

Figure 10 is a top view of the display panel shown in the first step of Figure 9.

Figure 11 is an enlarged cross-sectional view showing the display panel shown in Figure 10.

The invention will be described more fully hereinafter with reference to the accompanying drawings in which FIG. As those skilled in the art would understand, the described embodiments may be modified in various different ways without departing from the spirit or scope of the invention.

In the specification, the word "comprise" and its variants such as "comprises" or "comprising" are to be understood to include the recited elements, unless otherwise specified. element. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" another element, it may be directly on the other element or the relay element may be present. Further, in the specification, the upper portion of the target portion indicates the upper portion or the lower portion of the target portion, and it is not necessary to indicate that the target portion is always located on the upper side based on the gravity direction.

1 is a schematic view of a cutting device for a display panel in accordance with an exemplary embodiment.

Referring to Fig. 1, a cutting apparatus 100 for a display panel according to an exemplary embodiment of the present invention includes a first conveying portion 10, a stage 20, a cutting blade 31, and a second conveying portion 40.

The first transfer unit 10 supplies the display panel 50 of the mother substrate to the stage 20. The stage 20 is formed in a cylindrical shape which is rotated at a predetermined speed, and the display panel 50 is adsorbed by using vacuum pressure. The cutting blade 31 reciprocates relative to the stage 20, and cuts the display panel 50 adsorbed by the stage 20. The first transfer portion 40 transfers the cut display panel 50 to the next process.

The cutting device 100 of the exemplary embodiment of the present invention targets the flexible display panel 50. In other words, the cutting device 100 is used to cut a flexible display panel 50 including a flexible substrate such as a polymer film, rather than a display panel including a rigid substrate.

The flexible display panel 50 includes a flexible substrate, a barrier layer disposed on the flexible substrate, a buffer layer, a pixel circuit, an organic light emitting diode (OLED), and a thin film encapsulation layer. The barrier layer and the buffer layer are formed by depositing a plurality of inorganic layers, and the thin film encapsulation layer is formed by a plurality of organic layers and a plurality of inorganic layers alternately deposited one to one. The barrier layer and the buffer layer inhibit penetration toward the back side of the water vapor of the organic light emitting diode (OLED), and the thin film encapsulation layer inhibits penetration toward the front side of the water vapor of the organic light emitting diode (OLED).

The flexible display panel 50 inserted into the stage 20 is a mother substrate including a plurality of unit cells. The flexible display panel 50 of the mother substrate is formed by a structure in which a pixel circuit, an organic light emitting diode (OLED), and a thin film encapsulation layer corresponding to a plurality of display panels are deposited in a sheet shape on the flexible substrate. on. The protective film is attached to the outer surface of the flexible substrate and the thin film encapsulation layer.

The first transfer portion 10 and the second transfer portion 40 may be generally formed as a transport device or a conveyor belt. The first conveying portion 10 is located on one side of the stage 20 to provide the display panel 50 on the stage 20, and the second conveying portion 40 is located under one side of the stage 20 to The lower portion of the stage 20 receives and transports the cut display panel 50. Referring to Fig. 1, one side of the first transfer unit 10 and the second transfer unit 40 is on the right side of the stage 20.

The cutting blade 31 is attached to the outside of the stage 20 and is lowered toward the display panel 50 to cut the display panel 20. The cutting blade 31 is located on one side with respect to the first conveying unit 10 and the second conveying unit 40. The cutting blade 31 is coupled to the cutting drive 32 and reciprocates relative to the stage 20. The cutting drive 32 can be formed by various methods such as a cylinder driving method and a mechanical device of a cam driving method.

In the cutting device 100 of the exemplary embodiment of the present invention, the stage 20 is formed in a cylindrical shape having a predetermined curvature instead of a flat plate shape. Therefore, the display panel 50 adsorbed to the stage 20 is bent to have the same curvature as the stage 20, thereby bending to generate a pulling force, so that the display panel 50 is cut by the cutting blade 31 in a state where the pulling force is applied.

The stage 20 is coupled to the vacuum suction portion and the air release portion described below, thereby stably adsorbing the display panel 50 provided by the first transfer portion 10, and smoothly conveying the cut display panel 50 to the second transfer portion 40. .

Fig. 2 is a perspective view showing a part of the cutting device shown in Fig. 1, and Fig. 3 is a sectional view showing the stage shown in Fig. 2. .

Referring to FIGS. 2 and 3, the stage 20 is formed in a double tube shape including a plurality of openings. In other words, the stage 20 includes an inner tube 22 forming a plurality of first openings 21, a tube 24 forming a plurality of second openings 23, and a first opening 21 and a second opening connected between the inner tube 22 and the outer tube 24. 23 of a plurality of connecting tubes 25.

According to the radial direction of the stage 20, the first opening 21 and the second opening 23 face each other, and they provide the same number and correspond one-to-one to each other. a plurality of connecting tubes 25 are parallel to The stage 20 is provided in the radial direction. The first openings 21 are disposed at equal intervals from each other according to the axial direction and the circumferential direction of the inner tube 22, and the second openings 23 are disposed at equal intervals from each other according to the axial direction and the circumferential direction of the outer tube 24.

The stage 20 is rotated by the power of the stage driver 60. The stage drive 60 may include a drive motor 61, a drive gear 62 that connects the drive motor 61, and a vertical motion gear 63 that is formed in accordance with the circumferential direction of the outer tube 24 and that engages the drive gear 62. In this example, if the drive gear 62 is rotated by the power of the drive motor 61, when the vertical motion gear 63 meshes with the drive gear 62, the stage 20 rotates.

The stage driver 60 is not limited to the above structure, and a mechanical structure that couples the stage 20 to rotate the stage 20 can be applied.

The tubular support member 65 is coupled to both ends of the stage 20 via bearings 66 to support the stage 20. The bearing 66 can be a ball bearing in which a plurality of metal balls are disposed between the inner ring and the outer ring. In this example, the support member 65 is fixed to the inner ring, and the inner tube 22 of the stage 20 is fixed to the outer ring. The bearing 66 is not limited to a ball bearing and can replace various bearings.

Fig. 4 is a perspective view showing the inside of the stage shown in Fig. 2, Fig. 5 is a perspective view of the vacuum suction portion viewed from the direction A of Fig. 4, and Fig. 6 is a view showing Fig. 4; A cross-sectional view of the vacuum adsorption section and the air release section.

Referring to FIGS. 4 to 6 , the cutting device 100 includes a vacuum suction portion 70 and an air release portion 80 that are located inside the stage 20 . The support member 65 is fixed to both sides of the vacuum suction portion 70 and the air release portion 80 to support the vacuum suction portion 70 and the air release portion 80. The vacuum adsorption unit 70 and the air release unit 80 are separated from the inner tube 22 and rotated at a predetermined distance.

The vacuum adsorption portion 70 includes a first body 72 that faces a portion of the inner tube 22 and forms a plurality of first slits 71, a vacuum pump 73 that generates vacuum pressure, and an inner portion that connects the first body 72 and a vacuum pump The first connecting pipe 74 of 73.

The first body 72 may be formed in a semi-cylindrical shape, and a plurality of first slits 71 are formed on a curved surface facing the inner tube 22. The plurality of first slits 71 are formed in accordance with the circumferential direction of the first body 72, and may be formed at equal intervals from each other in accordance with the axial direction of the first body 72. The vacuum pump 73 is located outside the support member 65, and the first connecting tube 74 is located inside the support member 65, thereby connecting the first body 72 and the vacuum pump 73.

The first body 72 is fixed and mounted to a portion of the display panel 50 to be adsorbed. In other words, the first body 72 is located on the inner left side of the stage 20 facing the cutting blade 31 of Fig. 1.

The vacuum pressure generated by the vacuum pump 73 is transmitted to the display panel 50 via the first slit 71 of the first body 72, the first opening 21 facing the stage 20 of the first body 72, and the second opening 23. Therefore, the display panel 50 inserted into the stage 20 is adsorbed by vacuum pressure to be firmly fixed to the stage 20.

At this time, the first body 72 is fixed and mounted at a predetermined position, and the plurality of first openings 21 and the plurality of second openings 23 are disposed at equal intervals according to the circumferential direction and the axial direction of the stage 20, so that when loaded When the stage 20 is rotated, vacuum pressure is applied to the display panel 50 in the position where the first body 72 is mounted.

The air release portion 80 includes a second body 82 facing a portion of the inner tube 22 and forming a plurality of second slits 81, an air pump 83 for discharging compressed air, and an inner portion and an air pump connecting the second body 82. The second connecting tube 84 of 83.

The second body 82 may be formed in a semi-cylindrical or quarter-cylindrical shape, and a plurality of second slits 81 are formed on a curved surface facing the inner tube 22. The plurality of second slits 81 are elongated in accordance with the circumferential direction of the second body 82, and may be disposed at equal intervals in accordance with the axial direction of the second body 82. The air pump 83 is located outside the support member 65, and the second connecting tube 84 is mounted inside the support member 65, thereby connecting the second body 82 and the air pump 83.

The second body 82 is fixed and mounted to a portion of the display panel 50 to be separated. In other words, the second body 82 is located on the inner right side of the stage 20 facing the second conveying portion 40 of Fig. 1 .

The compressed air discharged from the air pump 83 is transmitted to the display panel 50 via the second slit 81 of the second body 82, the first opening 21 facing the stage 20 of the second body 82, and the second opening 23. Therefore, the display panel 50 adsorbed to the stage 20 and cut is separated from the stage 20 by compressed air, and is transferred to the second transfer unit 40.

At this time, the second body 82 is fixed and mounted at a predetermined position, and the plurality of first openings 21 and the plurality of second openings 23 are disposed at equal intervals according to the circumferential direction and the axial direction of the stage 20, so that when loaded When the stage 20 is rotated, the compressed air is blown toward the display panel 50 located in the position where the second body 82 is mounted.

In FIGS. 4 and 6, the first body 72 is formed in a semi-cylindrical shape, and the second body 82 is formed in a quarter cylindrical shape, but the width of the curved surface of the first body 72 and the second body 82 is It is not limited to the examples, and various modifications can be made.

Figure 7 is an enlarged cross-sectional view of the display panel in the cutting process.

Referring to FIGS. 1 and 7, the display panel 50 from which the first transfer unit 10 is inserted into the stage 20 is adsorbed to the surface of the stage 20. The display panel 50 adsorbed to the stage 20 is bent The curvature is the same as that of the stage 20, and a pulling force is generated by bending, and is cut by the cutting blade 31 in a state where a tensile force is applied.

In FIG. 7, the display panel 50 includes a flexible substrate 51, a barrier layer 52, a buffer layer 53, a pixel circuit 54, an organic light emitting diode (OLED) layer 55, and a thin film encapsulation layer 56. Further, the lower protective film 57 and the upper protective film 58 are located on the outer surfaces of the flexible substrate 51 and the thin film encapsulation layer 56, respectively.

When the display panel 50 is pierced by the cutting blade 31 in a state where the pulling force is applied, the surface of the slit of the display panel 50 after the cutting of the cutting blade 31 is directly opened by the pulling force. Therefore, the force of pushing the layers in the horizontal direction of each side of the cutting blade 31 by the piercing of the cutting blade 31 does not occur, thereby preventing the barrier layer 52 and the buffer layer including the plurality of inorganic layers from being prevented. The crack of 53 is produced.

Fig. 8 is a view showing the cutting process of the display panel using the cutting device of the comparative example.

Referring to Fig. 8, if the cutting blade 31 enters the display panel 501 without applying a pulling force, the force pushing the layers (refer to the arrow) is generated in the horizontal direction of each side of the cutting blade 31. Therefore, cracks are generated in the barrier layer 52 and the buffer layer 53 which are made of an inorganic layer close to the surface of the slit, so that shrinkage defects due to cracks may be generated in the display panel 501.

However, in the cutting device 100 of the exemplary embodiment of the present invention, a pulling force can be applied to the display panel 50 such that the slit surface is easily opened by a small pressure (by the scratch of the cutting blade 31) by the cutting blade The piercing crack of 31 will not occur. Therefore, the cutting device 100 of the exemplary embodiment of the present invention can smoothly cut the display panel 50 without cracks, and the shrinkage defect of the display panel 50 can be avoided.

FIG. 9 is a process flow diagram of a method of manufacturing a display device according to an exemplary embodiment.

Referring to FIG. 9, the manufacturing method of the display device includes a first step of transferring the display panel of the mother substrate to the cylindrical stage (S10), and adsorbing the display panel to the stage while bending the display panel to be the same as the stage. The curvature is to apply a pulling force to the second step of the display panel (S20). Further, the manufacturing method of the display device includes a third step of cutting the display panel by using a cutting blade (S30), and a fourth step of separating the cut display panel from the stage (S40).

Figure 10 is a top view of the display panel shown in the first step of Figure 9, and Figure 11 is an enlarged cross-sectional view of the display panel shown in Figure 10.

Referring to FIG. 10 and FIG. 11 , the display panel 50 of the first step ( S10 ) includes a flexible substrate 51 , and a plurality of pixel circuits and a plurality of organic light emitting diodes (OLEDs) 551 are respectively disposed on the flexible A plurality of predetermined unit cell regions (shown by broken lines in Fig. 10) on the substrate 51. In addition, the display panel 50 includes a thin film encapsulation layer 56 covering a plurality of organic light emitting diodes (OLEDs) 551, a protective film 58 over the cover film encapsulation layer 56, and a protective film 57 covering the outer surface of the flexible substrate 51. .

A pixel circuit and organic light emitting diodes (OLEDs) 551 are formed one after another for each pixel. The pixel circuit includes at least two thin film transistors (switching film transistor and driving thin film transistor) and at least one capacitor. Fig. 11 shows a driving film transistor 541. The barrier layer 52 and the buffer layer 53 are located between the flexible substrate 51 and the pixel circuit. The barrier layer 52 and the buffer layer 53 are formed by a structure in which a plurality of inorganic layers are deposited.

The organic light emitting diode (OLED) 551 includes a pixel electrode 552, an organic light emitting layer 553, and a common electrode 554. The pixel electrode 552 is separately provided to each pixel and electrically The driving film transistor 541 is connected. The common electrode 554 is formed in the entire flexible substrate 51 without pixel distinction. The switch film electro-crystal system is used as a switch for selecting pixels for illumination, and the drive film transistor 541 is applied to apply a driving voltage for causing the organic light-emitting layer 553 in the selected pixel to emit light to the pixel electrode 552.

One of the pixel electrode 552 and the common electrode 554 is an anode serving as a hole injection electrode, and the other is a cathode serving as an electron injection electrode. The holes injected from the anode and the electrons injected from the cathode are combined in the organic light-emitting layer 553 to generate excitons, and when the excitons emit energy, light emission is performed.

One of the pixel electrode 552 and the common electrode 554 may be formed of a metal layer, and the other may be formed of a semi-transmissive layer or a transparent conductive layer. The light of the organic light-emitting layer 533 is reflected from the metal layer and transmitted to the semi-transmissive layer or the transparent conductive layer to emit light outward.

The thin film encapsulation layer 56 encapsulates a plurality of organic light emitting diodes (OLEDs) 551 to suppress deterioration of the organic light emitting diodes (OLEDs) 551 caused by external moisture and oxygen. The thin film encapsulation layer 56 may have a structure in which at least one organic layer and at least one inorganic layer are alternately stacked one after another. Further, the uppermost layer exposed to the outside of the thin film encapsulation layer 56 may be formed of an inorganic layer to prevent vapor from penetrating into the organic light emitting diode 551.

The organic layer of the film encapsulation layer 56 is made of a polymer, and may be, for example, polyethylene terephthalate, polyimide, polycarbonate, epoxy. It is produced by a single layer or a plurality of layers of any of epoxy, polyethylene, and polyacrylate. The inorganic layer of the thin film encapsulation layer 56 may be a single layer or a plurality of layers including a metal oxide or a metal nitride. For example, the inorganic layer may include any of a nitride (SiNx), an aluminum oxide (Al ₂ O ₃ ), cerium oxide (SiO ₂ ), and titanium dioxide (TiO ₂ ).

Referring again to FIGS. 1 to 6, in the first step (S10), the display panel 50 of the mother substrate is transferred to the stage 20 by the first transfer unit 10, and is displayed in the second step (S20). The panel 50 is adsorbed to the outer tube 24 of the stage 20 by the vacuum pressure generated by the vacuum suction unit 70. In the second step (S20), the display panel 50 is bent to have the same curvature as the outer tube 24 of the stage 20, thereby generating a pulling force.

In the third step (S30), the cutting blade 31 is lowered toward the display panel 50 and the display panel 50 is cut. By piercing the cutting blade 31 by the display panel 50 to which the pulling force is applied, after the piercing of the cutting blade 31, the slit surface of the display panel 50 is directly opened easily by the pulling force. Therefore, crack generation of the barrier layer 52 and the buffer layer 53 can be prevented, and a uniform slit surface can be obtained.

The cut display panel 50 is maintained in a state where the cut display panel 50 is adsorbed to the stage 20, and then receives compressed air at a position facing the second body 82 to be separated from the stage 20. The display panel 50 separated from the stage 20 is transferred to the next process via the second transfer unit 40.

Referring to FIG. 10, the display panel 50 of the mother substrate includes a plurality of parallel unit cells (shown by broken lines) according to the first direction (y-axis direction) and the second direction intersecting the first direction (x-axis direction). ) and set in parallel.

The first cutting of the display panel 50 is divided into strips according to the first cutting line CL1 parallel to the first direction, wherein a plurality of unit cells are formed in one direction (line cutting). The strip-shaped display panel 50 is then cut according to a second cutting line CL2 parallel to the second direction, whereby a plurality of unit cells are individually distinguished (unit cut).

The upper protective film 58 and the lower protective film 57 are removed after the cutting process, and at least a portion may not be removed and may remain on the display panel 50. The display panel 50 separated by the cutting process is then assembled by a chip on film (COF) and a printed circuit board (PCB) to complete the display device. The Flexible Printed Circuit (FPC) includes a control circuit for outputting a control signal to the display panel 50, and a flip chip for electrically and physically connecting the display panel 50 and the flexible printed circuit (FPC).

While the present invention has been described in connection with the embodiments of the present invention, it is understood that the invention is not limited to the disclosed embodiments, but in another aspect, the present invention is intended to cover the appended claims. Various modifications and equivalent configurations of the spirit and scope of the scope.

10‧‧‧First Transfer Department

20‧‧‧ stage

31‧‧‧ cutting knife

32‧‧‧Cut drive

40‧‧‧Second Transfer Department

50‧‧‧ display panel

72‧‧‧ first subject

82‧‧‧Second subject

100‧‧‧ cutting device

Claims (14)

A cutting device for a flexible display panel, comprising: a loading platform for receiving a flexible display panel of a mother substrate by an adsorption method to support the flexible display panel, and bending the same The flexible display panel is configured to apply a pulling force to the flexible display panel, wherein the loading platform is formed in a cylindrical shape and coupled to a stage drive to rotate; a vacuum adsorption portion is mounted on the inside of the loading platform. Providing a vacuum pressure to the stage, the vacuum adsorption portion includes a first body, the first main system facing a portion of the stage and forming a plurality of first slits, such that the flexible display panel And being fixed to the stage by the vacuum pressure passing through the plurality of first slits; an air release portion is mounted on the other side of the inside of the stage and blows a compressed air toward the stage, the air The release portion includes a second body, the second main system facing a portion of the stage and forming a plurality of second slits, such that the flexible display panel is blown by the plurality of second slits Air from the stage Released; and a cutting knife, when the stage with respect to the reciprocating motion, the cutting of the flexible display panel. The cutting device of claim 1, wherein the loading platform comprises: an inner tube forming a plurality of first openings; and an outer tube surrounding the inner tube and forming a plurality of second openings; A plurality of connecting tubes are respectively connected to the plurality of first openings and the plurality of second openings between the inner tube and the outer tube. The cutting device of claim 2, wherein the plurality of first openings and the plurality of second openings are one-to-one and face-to-face corresponding to each other according to one of the radial directions of the stage. The cutting device of claim 2, wherein the stage drive comprises: a drive motor; a drive gear coupled to the drive motor; and a vertical movement gear according to a circumferential direction of the outer tube The drive gear is formed and engaged. The cutting device of claim 2, further comprising: a pair of support members coupled to one end of the inner tube via a bearing, and the vacuum adsorption portion and the air release portion are fixed and mounted to separate The inner tube between the pair of supports. The cutting device of claim 2, wherein the vacuum adsorption portion comprises: a vacuum pump for generating the vacuum pressure; and a first connecting tube connecting the inner portion of the first body and The vacuum pump. The cutting device of claim 6, wherein the first main system is formed as a half cylinder and is disposed toward the cutting blade, and forms a plurality of surfaces facing a curved surface of the inner tube The first slit. The cutting device of claim 2, wherein the air release portion comprises: an air pump that releases the compressed air; and a second connecting tube that connects the inside of the second body and the Air pump. The cutting device of claim 8, wherein the second main system is formed as a quarter cylinder and is disposed facing the flexible display panel after cutting and facing One of the inner tubes has a curved surface to form the plurality of second slits. The cutting device of claim 2, further comprising: a first transmitting portion for receiving and transmitting the flexible display panel of the mother substrate to the stage; and a second transmitting portion The flexible display panel that has been cut is received and transferred from the stage to the next process. The cutting device according to claim 10, wherein the first conveying portion and the second conveying portion are disposed on one side of the vacuum suction portion via the stage, and the air releasing portion is Provided toward the second transfer portion. A manufacturing method of a flexible display device, comprising: transmitting one of a flexible display panel in a mother substrate to one of a rotating cylindrical shape; and absorbing the flexible display panel by using vacuum pressure To the stage, and bending the flexible display panel to the same curvature as the stage to apply a pulling force to the a flexible display panel; the flexible display panel is cut by using a cutting blade; and the compressed air is blown to the cut flexible display panel to cut the flexible display panel Separated from the stage. The method of claim 12, wherein the flexible display panel of the mother substrate comprises a plurality of unit cells arranged according to a first direction and a second direction intersecting the first direction. The method of claim 13, wherein the flexible display panel of the mother substrate is cut according to a first cutting line parallel to the first direction to be divided into strips, wherein the plurality of unit cells The flexible display panel is formed in one direction, and the strip-shaped flexible display panel is cut according to a second cutting line parallel to the second direction to be divided into the respective flexible display panels.