KR102246643B1 - Manufacturing method of cover glass part and manufacturing apparatus of cover glass part - Google Patents

Abstract

Disclosed is a method for manufacturing a cover glass part. The manufacturing method of the cover glass part of the present invention comprises: a mounting step of mounting a display module on a stage; A pressing step of pressing the display module such that the first press unit forms a display curved portion at an edge portion of the display module; A first attaching step of attaching the cover glass and the display module by pressing the cover glass having the curved glass portion formed on the edge portion of the second pressing unit against the display module; And a second attaching step of pressing the curved portion of the display toward the curved portion of the glass and attaching the curved portion to the curved portion.

Description

Manufacturing method of cover glass part and manufacturing device of cover glass part {MANUFACTURING METHOD OF COVER GLASS PART AND MANUFACTURING APPARATUS OF COVER GLASS PART}

The present invention relates to a method for manufacturing a cover glass unit and an apparatus for manufacturing a cover glass unit, and more particularly, a method for manufacturing a cover glass unit capable of improving the adhesion performance between a display module and a cover glass at a curved edge unit and manufacturing a cover glass unit It relates to the device.

In general, a cover glass part is installed in a portable terminal. Touch the cover glass to select a specific screen or perform a specific function. The cover glass part is formed by attaching a display module to the cover glass.

Both edge portions of the cover glass are formed to be curved. At this time, the display module is attached to one surface of the cover glass where both sides are curved.

However, in the related art, since the edge portion of the cover glass is formed to be curved, the adhesion failure rate increases as the display module is not attached to the curved edge portion of the cover glass or is lifted. In addition, in the process of adhering the cover glass and the display module, there has been an increase in adhesion defects caused by the inability to discharge air bubbles.

In addition, when the attachment pressure is increased to reduce the defect rate of the edge portion of the cover glass and the display module, cracks may occur at the edge portion of the cover glass.

The background technology of the present invention is disclosed in Korean Patent Application Publication No. 2017-0084811 (published on July 21, 2017, title of the invention: mobile terminal).

The present invention was created to improve the above problems, and an object of the present invention is to provide a method for manufacturing a cover glass portion and an apparatus for manufacturing a cover glass portion capable of improving the adhesion performance between a display module and a cover glass in a curved edge portion. To provide.

A method of manufacturing a cover glass unit according to the present invention comprises: a mounting step of mounting a display module on a stage; A pressing step of pressing the display module such that a first press unit forms a display curved portion at an edge portion of the display module; A first attaching step of attaching the cover glass and the display module by pressing a cover glass having a curved glass portion formed at an edge portion of the second pressing unit against the display module; And a second attaching step of attaching the curved portion of the display to the curved portion of the glass by pressing the curved portion toward the curved portion of the glass.

The pressing step may include forming the curved portion of the display by pressing the first pressing portion of the edge portion of the display module; And pressing the display curved portion toward the stage by a clamp.

In the pressing step, the first press unit may heat the display module.

The edge portion of the display module may be locally heated to form the curved portion of the display.

The first attaching step may include moving the first press part to an outside of the display module; Forming an adhesive layer on the display module; And heating and pressing the cover glass and the display module after the second press unit positions the cover glass on the display module.

In the step of forming the adhesive layer on the display module, the adhesive layer may be formed on the entire surface of the display module.

Before the second bonding step, the clamp may be moved to the outside of the curved portion of the display.

In the second attaching step, a pusher may press the curved portion of the display toward the curved portion of the glass to attach it.

The pusher may include a rotating arm rotatably installed on the stage; And a pressure roller installed on the rotating arm and rolling in contact with the curved portion of the display, and in the second attaching step, the pressure roller may attach the curved portion of the display to the curved portion of the glass while rolling in contact with the curved portion of the display. .

The pressing roller may press the curved portion of the display while moving from the center side to the end side of the display module.

The pusher is disposed at a corner of the stage and includes a pressure cushion part that is expanded as a fluid is injected to pressurize the display curved part, and in the second attaching step, the display curved part is made of the glass as the pressure cushion part is expanded. It can be attached to the curved part.

The display module may be a flexible display module.

The apparatus for manufacturing a cover glass unit according to the present invention includes: a first press unit for forming a curved display unit by pressing a display module positioned on a stage; A second press unit for pressing the display module and the cover glass stacked on the stage; And a pusher for attaching the cover glass and the display module by pressing the display curved portion on the cover glass.

Curved ribs may be formed on both sides of the first press portion to form the curved portion of the display.

The first press unit may further include a heating unit installed to heat the display module.

The heating unit may be installed on the curved rib to heat the curved portion of the display.

The second press part may further include a vacuum port for adsorbing the cover glass.

The pusher may include a rotating arm rotatably installed on the stage; And a pressing roller installed on the rotating arm and pressing the display curved portion to adhere the display curved portion to the cover glass.

When the rotary arm is rotated outward, it may be elongated in the longitudinal direction.

The rotary arm may be formed by combining two or more arm units so as to be extended by a spring.

The rotary arm may be formed by combining two or more arm units so as to be extended by hydraulic pressure of a working fluid.

The pusher may include a pressure cushion part disposed at a corner of the stage and expanding as a fluid is injected to pressurize the curved part of the display.

According to the present invention, since the display curved portion and the glass curved portion are attached to each other in the second attaching step, it is possible to prevent the display curved portion and the glass curved portion from being unattached or lifted. In addition, it is possible to prevent a phenomenon in which air bubbles are not released during the bonding process between the cover glass and the display module. Accordingly, it is possible to suppress the occurrence of adhesion failure of the cover glass portion.

In addition, according to the present invention, since the first press unit locally heats the edge portion of the display module and forms the display curved portion in the display module, it is possible to suppress damage to the display module by heat.

Further, according to the present invention, since the pressing force is applied locally only to the curved portion of the glass and the curved portion of the display in the second attaching step, the pressure applied to the cover glass and the display module may be reduced. Accordingly, it is possible to prevent cracks from occurring in the cover glass or the display module.

1 is a block diagram illustrating a state in which a display module according to an embodiment of the present invention is mounted on a stage.
2 is a configuration diagram showing a state in which a display module according to an embodiment of the present invention is pressed by a first press unit.
3 is a block diagram illustrating a state in which an adhesive layer is formed on one side of a display module according to an exemplary embodiment of the present invention.
4 is a configuration diagram illustrating a state in which a display module according to an embodiment of the present invention is pressed by a second press unit.
5 is a configuration diagram illustrating a state in which a clamp pressurizes a curved portion of a display module according to an exemplary embodiment of the present invention.
6 is a configuration diagram showing a state in which the pressing roller of the pusher unit presses the curved portion of the display and attaches it to the curved portion of the glass according to an embodiment of the present invention.
7 is a configuration diagram showing a state in which a pressing roller of a pusher unit presses a curved portion of a display and attaches it to a curved portion of a glass according to an embodiment of the present invention.
8 is a configuration diagram illustrating a state in which a second press portion is raised after a pressure roller of a pusher unit according to an embodiment of the present invention attaches a curved portion of a display and a curved portion of a glass.
9 is a block diagram showing a pusher unit according to another embodiment of the present invention.
10 is a block diagram illustrating a state in which a pressure cushion part of a pusher part is attached to a curved part of a display and a curved part of a glass according to another embodiment of the present invention.

Hereinafter, an embodiment of a method for manufacturing a cover glass portion and an apparatus for manufacturing a cover glass portion according to the present invention will be described with reference to the accompanying drawings. In the process of describing the manufacturing method of the cover glass portion and the manufacturing apparatus of the cover glass portion, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

Referring to FIGS. 1 and 2, a method of manufacturing a cover glass part according to an exemplary embodiment of the present invention includes a mounting step of mounting the display module 10 on the stage 30.

An elastic rubber (not shown) capable of reducing the impact is installed on the surface of the stage 30. As the elastic rubber, various materials such as silicone, urethane, Teflon, and isoprene series can be applied. The elastic rubber may be formed to a thickness of approximately 1-20mm.

The display module 10 includes a screen display unit (not shown), a touch unit (not shown), and a power supply unit (not shown). The flexible display module 10 may be applied as the display module 10. As the flexible display module 10 is applied, the shape of the display module 10 can be easily changed to correspond to the shape of the cover glass 20.

An organic light diode (OLED) may be applied as the screen display unit. Of course, quantum dot light emitting diodes (QLEDs), liquid crystal displays (LCDs), etc. may be applied as the screen display unit.

The touch unit may be a touch panel that processes a specific function by touching the cover glass unit. The power supply unit may be a power supply circuit board that supplies power to the touch unit and the screen display unit.

A pressing step of pressing the display module 10 so that the first press unit 40 forms the display curved portion 13 at the edge portion of the display module 10 is performed. A display curved portion 13 is formed at an edge portion of the display module 10. The display curved portions 13 may not be formed on both sides of the display module 10 in the longitudinal direction.

In the pressing step, the first press unit 40 heats the display module 10. Accordingly, as the display module 10 is heated, the ductility of the display module 10 increases, so that the display curved portion 13 can be easily formed at the edge portion of the display module 10.

At this time, the flat portion 41 is formed on the lower side of the first press portion 40, and the curved ribs 43 are formed to protrude on both sides of the flat portion 41 in the width direction. The curved ribs 43 are formed on both sides of the first press part 40 in the width direction and may not be formed on both sides in the length direction. When the curved rib 43 presses the edge portion of the display module 10, the display curved portion 13 is formed at the edge portion of the display module 10. A heating unit 45 may be installed inside the first press unit 40 to heat the first press unit 40. The heating unit 45 heats the first press unit 40 to about 50-250°C. The temperature of the first press unit 40 may be appropriately changed depending on the physical properties of the display module 10 or the like.

The heating unit 45 may be installed locally on the curved rib 43 of the first press unit 40 to locally heat the edge portion of the display module 10. Since the first press unit 40 locally heats the edge portion of the display module 10 and forms the display curved portion 13 on the display module 10, it is possible to suppress the display module 10 from being damaged by heat. . Of course, a heating unit 45 may be installed on the first press unit 40 to heat the display module 10 as a whole.

In the pressing step, the first press portion 40 presses the edge portion of the display module 10 to form the display curved portion 13, and the clamp 50 presses the display curved portion 13 toward the stage 30. Includes steps. In the pressing step, since the clamp 50 presses the display curved portion 13 toward the stage 30, the display curved portion 13 is in close contact with the side portion of the stage 30. Accordingly, it is possible to prevent the display curved portion 13 from being unfolded by its own elasticity in the pressing step.

A first attaching step of attaching the cover glass 20 and the display module 10 by pressing the cover glass 20 with the glass curved portion 23 formed on the edge portion of the second press unit 60 to the display module 10 Is in progress. In the first attaching step, the portion of the display module 10 corresponding to the flat portion 41 of the first press portion 40 is attached, and the display curved portion 13 is not attached to the glass curved portion 23.

The first attaching step includes moving the first press unit 40 to the outside of the display module 10, forming an adhesive layer 15 on the display module 10, and the second press unit 60 It includes the step of pressing the cover glass 20 and the display module 10 after placing the cover glass 20 on the display module 10. Even in the first attaching step, the clamp 50 maintains a state in which the display curved portion 13 is still pressed.

At this time, the cover glass 20 positions the cover glass 20 on the display module 10 by a transfer device (not shown) such as a vacuum port, and then the second press unit 60 holds the cover glass 20. You can pressurize.

In addition, while the second press unit 60 is positioned on the display module 10 in a state in which the cover glass 20 is adsorbed, the cover glass 20 and the display module 10 may be pressed. In this case, a vacuum port 63 is installed in the second press part 60. A plurality of vacuum ports 63 are disposed in the second press unit 60.

In the step of forming the adhesive layer 15 on the display module 10, the adhesive layer 15 is formed on the entire surface of the display module 10. Accordingly, the entire surface of the display module 10 may be adhered to the cover glass 20 through the first attaching step and the second attaching step.

Before the second bonding step, the clamp 50 is moved to the outside of the display curved portion 13. At this time, since the display curved portion 13 is released from the constraint of the clamp 50, the display curved portion 13 is stretched upwards by its own elasticity. Accordingly, the display curved portion 13 may be in contact with or slightly spaced apart from the surface of the glass curved portion 23.

A second attaching step of attaching the display curved portion 13 to the glass curved portion 23 by pressing the curved portion 13 toward the glass curved portion 23 is performed. In the second attaching step, the display curved portion 13 is attached to the glass curved portion 23. Since the display curved portion 13 and the glass curved portion 23 are attached to each other in the second attaching step, it is possible to prevent the display curved portion 13 and the glass curved portion 23 from being unattached or lifted. In addition, it is possible to prevent a phenomenon in which air bubbles are not discharged between the display curved portion 13 and the glass curved portion 23. Accordingly, it is possible to suppress the occurrence of adhesion failure of the cover glass portion.

Further, in the second attaching step, since the pressing force is applied locally only to the curved portion 23 and the curved portion 13 of the display, the pressure applied to the cover glass 20 and the display module 10 may be reduced. Accordingly, it is possible to prevent cracks from occurring in the cover glass 20 or the display module 10.

In the second attaching step, the pusher 70 presses the display curved portion 13 toward the glass curved portion 23 while attaching it. Since the pusher 70 attaches the display curved portion 13 to the glass curved portion 23, it is possible to prevent the display curved portion 13 and the glass curved portion 23 from being unattached or lifted. In addition, it is possible to prevent a phenomenon in which air bubbles are not discharged between the display curved portion 13 and the glass curved portion 23.

The pusher 70 includes a rotating arm 71 that is rotatably installed on the stage 30, and is installed on the rotating arm 71, and the display curved portion 13 is in close contact with the display curved portion 13 to the cover glass 20. ) And a pressure roller 73 for pressing. The rotary arm 71 is rotated by the driving unit 72. The rotary arm 71 is installed to be able to expand and contract in the longitudinal direction, and the length increases when it is rotated outward from the center side. The rotary arm 71 is rotated downward while extending in the longitudinal direction. In this second attachment step, the pressure roller 73 is in rolling contact with the display curved portion 13 to attach the display curved portion 13 to the glass curved portion 23.

At this time, the pressing roller 73 presses the curved portion 13 of the display while moving from the center side to the end side of the display module 10. Since the pressure roller 73 is moved from the display curved portion 13 to the end side and pressurized, the air between the display curved portion 13 and the glass curved portion 23 is discharged to the outside. Accordingly, it is possible to prevent a phenomenon in which air bubbles are not discharged between the display curved portion 13 and the glass curved portion 23.

In addition, the pressing roller 73 may attach the display curved portion 13 and the glass curved portion 23 while reciprocating the display curved portion 13 once or several times.

In addition, since the pressure roller 73 locally applies pressure to the curved portion 13 and the curved portion 23 of the glass, it is possible to prevent cracks from occurring in the cover glass 20 and the display module 10.

After the display module 10 and the cover glass 20 are completely attached, they are transferred to a subsequent process. A configuration in which the display module 10 and the cover glass 20 are attached is referred to as a cover glass part.

Next, an apparatus for manufacturing a cover glass unit according to an embodiment of the present invention will be described.

1 to 6, an apparatus for manufacturing a cover glass part includes a first press part 40, a second press part 60, and a pusher 70.

The first press part 40 presses the display module 10 located on the stage 30 to form the display curved part 13. Curved ribs 43 are formed on both sides of the first press portion 40 to form the curved portion 13 of the display. Since the curved ribs 43 are formed on both sides of the first press unit 40, when the display module 10 is pressed by the curved ribs 43 of the first press unit 40, both sides of the display module 10 In the display curved portion 13 is formed.

The first press unit 40 further includes a heating unit 45 installed to heat the display module 10. In this case, the heating unit 45 is installed on the curved rib 43 to heat the curved portion 13 of the display. Since the heating part 45 is installed on the curved rib 43, only the display curved part 13 is locally heated in the display module 10. Accordingly, it is possible to suppress the display module 10 from being damaged or damaged by the heat of the heating unit 45.

The heating unit 45 heats the first press unit 40 to about 50-250°C. The temperature of the first press unit 40 may be appropriately changed depending on the physical properties of the display module 10 or the like.

The apparatus for manufacturing the cover glass portion is disposed on both sides of the stage 30 and further includes clamps 50 for pressing the display curved portion 13 toward the stage 30. Since the clamp 50 presses the display curved portion 13 toward the stage 30, even if the first press portion 40 is raised, the display curved portion 13 can be prevented from being unfolded by its own elasticity.

The second press unit 60 presses the display module 10 and the cover glass 20 stacked on the stage 30. Accordingly, the display module 10 and the cover glass 20 may be attached.

The second press unit 60 further includes a vacuum port 63 for adsorbing the cover glass 20. A plurality of vacuum ports 63 may be installed on the second press unit 60. The vacuum port 63 adsorbs the cover glass 20 using vacuum pressure. Since the vacuum port 63 is installed in the second press part 60, the second press part 60 moves the cover glass 20 to the upper side of the stage 30 or to the outside of the stage 30. I can.

The pusher 70 presses the display curved portion 13 on the cover glass 20 to attach the cover glass 20 and the display curved portion 13. Since the pusher 70 presses the display curved portion 13 toward the cover glass 20, it is possible to prevent the display curved portion 13 and the glass curved portion 23 from being unattached or lifted. In addition, since the air bubbles are discharged to the outside between the display curved portion 13 and the glass curved portion 23, it is possible to improve the adhesion of the display curved portion 13 and the glass curved portion 23.

The pusher 70 includes a rotary arm 71 and a pressure roller 73. The rotary arm 71 is rotatably installed on the stage 30. The rotary arm 71 is connected to the driving unit 72 and rotated by the driving force of the driving unit 72. The driving unit 72 may be applied in various forms such as a motor unit that rotates the rotary arm 71.

The pressing roller 73 is installed on the rotating arm 71 and presses the display curved portion 13 to attach the display curved portion 13 to the glass curved portion 23 of the cover glass 20. The pressure roller 73 may be reciprocated once or a plurality of times by the rotary arm 71 to attach the display curved portion 13 and the glass curved portion 23.

Since the pressure roller 73 presses the display curved portion 13 and adheres it to the glass curved portion 23, bubbles can be easily discharged in the process of bonding the display curved portion 13 and the glass curved portion 23 to each other.

When the rotary arm 71 is rotated outward, it extends in the longitudinal direction. When the rotary arm 71 is rotated outward, it extends in the longitudinal direction, so that it is possible to prevent the display curved portion 13 and the glass curved portion 23 from being unattached or lifted. In addition, air bubbles generated in the process of bonding the display curved portion 13 and the glass curved portion 23 may be easily discharged to the outside.

The rotary arm 71 may be formed by combining two or more arm units (not shown) so as to be extended by a spring (not shown). When the rotation arm 71 is rotated outward and presses the display curved portion 13, the pressing roller 73 may press the display curved portion 13 as the rotation arm 71 is elongated by the elastic force of the spring. .

The rotary arm 71 is formed by combining two or more arm units (not shown) so as to be extended by hydraulic pressure of a working fluid (not shown). When the rotary arm 71 is rotated outward and presses the display curved portion 13, the pressing roller 73 can press the display curved portion 13 as the rotary arm 71 is elongated by the hydraulic pressure of the working fluid. have.

Next, another embodiment of a pusher for attaching the curved portion of the display and the curved portion of the glass in the second attaching step of the method of manufacturing the cover glass portion according to an embodiment of the present invention will be described.

The pusher 70 is disposed at the corner of the stage 30 and includes a pressure cushion part 77 that expands as a fluid is injected and presses the curved part 13 of the display. The pressure cushion part 77 is connected to the fluid supply line 76, and the fluid supply line 76 is connected to the fluid supply part 75. As the fluid supply unit 75 is driven, the fluid is supplied to the pressure cushion unit 77 through the fluid supply line 76. In the second attaching step, as the pressure cushion part 77 expands to the outside of the stage 30, the display curved part 13 may be attached to the glass curved part 23. Since the pressure cushion part 77 locally applies pressure to the display curved part 13 and the glass curved part 23, it is possible to prevent cracks from occurring in the cover glass 20 and the display module 10.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand.

Therefore, the true technical protection scope of the present invention should be determined by the claims.

10: display module 13: display curve
15: adhesive layer 20: cover glass
23: glass curved portion 30: stage
40: first press portion 41: flat portion
43: curved rib 45: heating unit
50: clamp 60: second press part
63: vacuum port 70: pusher
71: rotating arm 72: driving unit
73: pressure roller 75: fluid supply
76: fluid supply line 77: pressurized cushion part

Claims (22)

A mounting step of mounting the display module on the stage;
A pressing step of pressing the display module such that a first press unit forms a display curved portion at an edge portion of the display module;
A first attaching step of attaching the cover glass and the display module by pressing a cover glass having a curved glass portion formed at an edge portion of the second pressing unit against the display module; And
A second attaching step of attaching the curved portion of the display to the curved portion by pressing the display curved portion toward the curved portion of the glass; and
The pusher,
A rotation arm that is rotatably installed on the stage and extends in a longitudinal direction when it is rotated outward; And
And a pressure roller installed on the rotating arm and configured to press the curved portion of the display to adhere the curved portion of the display to the cover glass.
The method of claim 1,
The pressing step,
Forming the display curved portion by pressing the display module by the first press unit; And
And a step of pressing the curved portion of the display toward the stage by means of a clamp.
The method of claim 2,
In the pressing step, the method of manufacturing a cover glass unit, wherein the first press unit heats the display module.
The method of claim 3,
The method of manufacturing a cover glass portion, characterized in that the display curved portion is formed by locally heating the edge portion of the display module.
The method of claim 3,
The first attaching step,
Moving the first press part to the outside of the display module;
Forming an adhesive layer on the display module; And
And heating and pressing the cover glass and the display module after the second press unit positions the cover glass on the display module.
delete The method of claim 2,
The method of manufacturing a cover glass portion, wherein the clamp is moved to an outside of the curved portion of the display before the second attaching step.
delete The method of claim 1,
In the second attaching step, the pressure roller attaches the curved portion of the display to the curved portion of the glass while the pressure roller is in rolling contact with the curved portion of the display.
The method of claim 9,
The pressure roller is a method of manufacturing a cover glass portion, characterized in that while moving from the center side to the end side of the display module presses the curved portion of the display.
A mounting step of mounting the display module on the stage;
A pressing step of pressing the display module such that a first press unit forms a display curved portion at an edge portion of the display module;
A first attaching step of attaching the cover glass and the display module by pressing a cover glass having a curved glass portion formed at an edge portion of the second pressing unit against the display module; And
A second attaching step of attaching the curved portion of the display to the curved portion by pressing the display curved portion toward the curved portion of the glass; and
The pusher is disposed at a corner portion of the stage, and includes a pressure cushion portion that expands as the fluid is injected and presses the curved portion of the display,
In the second attachment step, as the fluid supply unit is driven, fluid is supplied to the pressurization cushion unit through a fluid supply line to expand the pressurization cushion unit, and the pressurization cushion unit expanded to the outside of the stage applies pressure to the curved portion of the display. The method of manufacturing a cover glass portion, characterized in that attaching the curved portion of the display to the curved portion of the glass.
delete A first press unit for pressing the display module positioned on the stage to form a curved display portion;
A second press unit for pressing the display module and the cover glass stacked on the stage; And
Including; a pusher for attaching the cover glass and the display module by pressing the curved portion of the display on the cover glass,
The pusher,
A rotation arm that is rotatably installed on the stage and extends in a longitudinal direction when rotated outward; And
And a pressing roller installed on the rotating arm and pressing the display curved portion to adhere the display curved portion to the cover glass.
The method of claim 13,
Apparatus for manufacturing a cover glass portion, characterized in that curved ribs are formed on both sides of the first press portion to form the curved portion of the display.
The method of claim 14,
The apparatus for manufacturing a cover glass part, wherein the first press part further comprises a heating part installed to heat the display module.
The method of claim 15,
The apparatus for manufacturing a cover glass part, wherein the heating part is installed on the curved rib to heat the curved part of the display.
The method of claim 13,
The apparatus for manufacturing a cover glass unit, wherein the second press unit further comprises a vacuum port for adsorbing the cover glass.
delete delete delete delete delete

Images