KR20220094958A - Display Apparatus and cutting method of Display Apparatus - Google Patents

Abstract

A display device according to the present embodiment has a cutout unit (230) formed along a location where stress unevenness occurs in a display module (200), when the cover glass (100) and the display module (200) are bonded.

Description

Display device and cutting method thereof {Display Apparatus and cutting method of Display Apparatus}

The present embodiment relates to a display device having improved stress non-uniformity generated in the display module when a cover glass and a display module are bonded to each other, and a method for cutting the same.

The importance of the display device is increasing with the development of multimedia. In response to this, various types of display devices such as a liquid crystal display (LCD) and an organic light emitting display (OLED) are being used.

Such a display device is expanding its scope not only to TVs and mobile devices, but also to wearable devices such as smart watches.

In particular, the cover glass of a display device applied to a smart watch has various shapes that are different from the rectangular shape applied to a typical mobile terminal.

For example, a conventional display device is applied to a smart watch and wirelessly interlocked with a mobile terminal to provide various additional functions to the user.

The display device includes a display module seated inside a case formed in a predetermined shape, and a cover glass in close contact with an upper surface of the display module.

The display module has a flat top surface and is coupled to each other through bonding with the cover glass. Recently, in order to improve the user's visual visibility, the cover glass has been manufactured in a dome type convexly protruding upward.

When the display module is bonded to the dome-shaped cover glass, the stress according to the bonding is unevenly distributed at the edge position that extends roundly to the upper side of the cover glass. There was a problem with the decrease in strength.

In addition, after bonding the display module, bubbles are generated around the location where the stress is non-uniformly distributed, or the frequency of defects due to wrinkles increases, so countermeasures are required.

The present embodiments are intended to provide a display device having improved stress uniformity of a display module bonded to a cover glass and a cutting method thereof.

A display device according to an embodiment includes a cover glass 100 formed in a dome type; It is coupled to the lower surface of the cover glass 100 and includes an active area (AA) 210 in which activated data is displayed, a view area (VA) 220 and a view area that are visible to the user. a display module 200 including an edge line 231 spaced apart from the 220 and forming an outer rim; and a case 300 coupled to the lower surface of the cover glass 100 and accommodating the display module 200 , wherein the display module 200 is bonded to the cover glass 100 when the display module 200 is bonded. ), the cut portion 230 cut along the position where the stress non-uniformity occurs is formed.

The cover glass 100 includes a first region 110 having a first radius of curvature; It extends outward along the edge of the first region 110 and includes a second region 120 having a second radius of curvature, and the cut portion 230 is cut within a section constituting the second region 120 . characterized in that

The cut portion 230 includes a first cut portion 232 cut in a round shape from the upper end of the lower edge of the edge line 231 toward the lower end of the upper edge; a second cut portion 234 cut in a round shape from the upper left edge of the edge line 231 toward the upper right edge; It includes a third cut portion 236 cut in a rounded shape from the lower end of the right edge of the edge line 231 toward the upper end of the lower right edge.

The first to third cut portions 232 , 234 , and 236 are roundly cut from the outside of the edge line 231 toward the inside of the viewing area 220 .

The first and third cut portions 232 and 236 are curved from the lower longitudinal edge of the edge line 231 toward the central position toward the view area VA, and then extend from the central position to the edge edge line. It is characterized in that the degree of curvature decreases toward the upper edge of (231).

The second cut portion 234 is curved from the upper left edge of the edge line 231 toward the central position in the width direction toward the view area (VA) 220, and then extends from the upper left edge of the edge line 231 to the upper right corner at the center position. It is characterized in that the degree of curvature decreases toward the edge.

The first cut portion 232 and the third cut portion 236 are cut in a left-right symmetrical form with respect to the center of the upper surface of the display module 200 .

The cut portion 230 is a first cutting distance (L) spaced apart from an intermediate position in the longitudinal direction or an intermediate position in the width direction of the view area 220 to an intermediate position in the longitudinal direction or an intermediate position in the width direction of the edge line 231 It is characterized in that it can be cut up to.

The first cutting distance (L) is characterized in that any one of the cutting distance selected from 50um ~ 450um.

The first cutting distance (L) is characterized in that 450um.

The cutting method of the display device includes: a first step (ST100) of recognizing the boundary surface by moving the optical equipment along the outer edge of the display module; a second step (ST200) of cutting along a position where the stress non-uniformity occurs when the display module is assembled; and a third step (ST300) in which the cut pieces are separated from the display module.

In the present embodiments, when the cover glass and the display module are bonded, a phenomenon in which the stress is non-uniformly combined or concentrated does not occur, so that the uniformity of the stress is constantly maintained along the bonding edge.

In the present embodiments, since it is possible to stably adhere to the display module with the thickness of the cover glass minimized, the overall thickness of the display device can be reduced, and the occurrence of bubbles and wrinkles due to deformation and stress concentration can be prevented, thereby improving the quality. can do.

According to the present exemplary embodiments, quality safety of a display device according to mass production may be improved, and a defect rate may be reduced, thereby contributing to a yield improvement.

1 is an exploded perspective view illustrating a display device according to an exemplary embodiment;
2 is a diagram illustrating a display panel and a peripheral configuration according to an embodiment;
3 is a plan view illustrating a display module bonded to a cover glass according to an embodiment;
4 is a plan view of a display module according to an embodiment;
5 is a longitudinal cross-sectional view of a display module according to an embodiment;
6 to 7 are enlarged views showing second to third cut-outs according to an embodiment.
8 is a flowchart illustrating a method of cutting a display module by a method of cutting a display device;
9 is a view showing a state in which the display module is cut by the cutter;
10 to 12 are views sequentially illustrating a cutting process of the display module;

Advantages and features of the present disclosure, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present disclosure to be complete, and common knowledge in the art to which the present disclosure belongs It is provided to fully inform those who have the scope of the disclosure, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

When one component is referred to as “connected to” or “coupled to” with another component, it means that it is directly connected or coupled to another component or intervening another component. including all cases. On the other hand, when one component is referred to as “directly connected to” or “directly coupled to” with another component, it indicates that another component is not interposed therebetween. “and/or” includes each and every combination of one or more of the recited items.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present disclosure. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises." and/or "comprising" a recited element, step, operation and/or element does not exclude the presence or addition of one or more other elements, steps, operation and/or element.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another.

A display device according to an exemplary embodiment will be described with reference to the drawings. For reference, FIG. 1 is an exploded perspective view illustrating a display device according to an embodiment, FIG. 2 is a view showing a display panel and a peripheral configuration according to an embodiment, and FIG. 3 is a cover glass and bonding according to an embodiment It is a plan view showing a used display module, FIG. 4 is a plan view of the display module according to an embodiment, and FIG. 5 is a longitudinal cross-sectional view of the display module according to an embodiment.

1 to 4 , in the display device 1 according to the present embodiment, when the dome-shaped cover glass 100 and the display module 200 are directly bonded to each other, the round shape of the cover glass 100 is The cut portion 230 is formed so that a stress imbalance does not occur at the edge position of the display module 200 due to true curvature, thereby improving the quality through bonding with improved stress uniformity.

In the following embodiments, the display device 1 is described as being applied to a smart watch, but is not limited to the described embodiments. That is, in various embodiments, the display device 1 may be applied to various wearable devices, such as a glass-type terminal (smart glass) and a head mounted display (HMD).

In addition, in various embodiments, the display device 1 is a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a slate PC It may be applied to electronic devices such as a slate PC, a tablet PC, an ultrabook, a digital TV, a desktop computer, and a digital signage.

The display device 1 may include a display module 200 , a data driving circuit 122 , a gate driving circuit 130 , and a display controller 140 .

The display module 200 may include a plurality of pixels and a plurality of sub-pixels constituting the pixels. The sub-pixel may include a sub-pixel electrode SPE and a driving transistor DRT for driving the sub-pixel electrode SPE, and may further include a common electrode CE and an emission layer EL.

The area from which the light emitted from the sub-pixel is emitted is the sub-emission area and has a larger size than the sub-pixel electrode. Light of a desired color can be realized by mixing light emitted from three or more sub-pixels, and a light-emitting region including three or more sub-emission regions can be configured. The light emitting region may be disposed to correspond to the pixel electrode.

The display module 200 may further include various types of signal wires for driving the plurality of sub-pixels. Each of the plurality of sub-pixels may include one or more transistors and one or more capacitors. Each of the plurality of sub-pixels may further include a light emitting device that emits light by itself. For example, the light emitting device may be formed of an organic light emitting diode (OLED), a micro LED, or a quantum dot.

In addition, various types of signal wirings may include a plurality of data lines transmitting a data signal (data voltage or image signal) and a plurality of gate lines transmitting a gate signal (scan signal). A plurality of data lines may extend in a first direction, and a plurality of gate lines may extend in a second direction to cross each other.

Here, the first direction may be a vertical (vertical) direction, and the second direction may be a horizontal (horizontal, horizontal) direction. In this specification, the vertical direction and the horizontal direction are relative. For example, if the vertical direction is a horizontal direction, the horizontal direction may be a vertical direction.

The data driving circuit 122 is a circuit for driving a plurality of data lines, and may output data signals to the plurality of data lines. The gate driving circuit 130 is a circuit for driving a plurality of gate lines, and may output gate signals to the plurality of gate lines.

The timing controller 140 is a device for controlling the data driving circuit 122 and the gate driving circuit 130 , and may control driving timings for the plurality of data lines and driving timings for the plurality of gate lines.

The timing controller 140 supplies a data driving control signal to the data driving circuit 122 to control the data driving circuit 122 , and applies a gate driving control signal to the gate driving circuit 130 to control the gate driving circuit 130 . 130) can be supplied.

The data driving circuit 122 may supply data signals to a plurality of data lines according to the driving timing control of the timing controller 140 . The gate driving circuit 130 may supply gate signals to a plurality of gate lines according to timing control of the display controller 140 .

The data driving circuit 122 may be a chip on film (COF) type, a chip on glass (COG) type, or a chip on panel (COP) type. The gate driving circuit 130 may be a gate in panel (GIP) type, a COF type, a COG type, or a chip on panel (COP) type. When the gate driving circuit 130 is of the GIP type, the gate driving circuit 130 may be directly formed in the non-display area NA of the display panel 100 .

The display device 1 according to this embodiment includes the cover glass 100 , the display module 200 and the case 300 described above, and the case 300 includes a band (not shown) to be worn on the user's wrist. ) can be combined.

The display module 200 is in close contact with the lower surface of the cover glass 100 . The display module 200 includes an active area (AA) 210 in which activated data is displayed and a view area (VA) 220 shown to the user, as shown by a dotted line in FIG. 4 . ) and an edge line 231 spaced apart from the view area 220 to form an outer edge. For reference, the non-view area NV (refer to FIG. 5 ) may be an area surrounding the outer edge of the view area VA 220 .

In the edge line 231 , a portion indicated by a solid line corresponds to a previously extended path, and a portion indicated by a dotted line (refer to FIG. 4 ) corresponds to a portion cut by a laser cutter. The edge line 231 includes portions that are rounded and extended by a solid line at respective corner positions of the first to third cut portions 232 , 234 , and 236 shown by dotted lines.

The active area AA 210 may be an area in which pixels are disposed and an image is displayed, and the view area VA 220 may be disposed around the active area AA 210 . For example, the view area VA 220 may be disposed along the edge of the active area AA 210 .

As a driver for driving pixels, for example, a gate driver and a data driver may be disposed in the view region 220 .

The case 300 is coupled to the lower surface of the display module 200 , and an insertion groove 310 for accommodating the display module 200 is formed. The insertion groove 310 is not limited to the illustrated shape and size, and may be variously modified.

The cover glass 100 is provided to cover the upper surface of the display module 200 . The cover glass 100 is formed in a rectangular curved surface rather than a flat plate shape. However, the shape of the cover glass 100 is not limited thereto, and in various embodiments, the cover glass 100 may have a curved surface such as a square, a circle, an oval, or a polygon.

In addition, the cover glass 100 may have a shape in which the edge is processed to be curved or a right angle, or the thickness of the cover glass 100 changes in at least one region.

In this embodiment, the cover glass 100 includes an active area (AA) 210 and a first area 110 (refer to FIG. 3 ) of the display module 200 and a viewing area 220 of the display module 200 and and a corresponding second region 120 (see FIG. 3 ). The first area 110 is a central area of the cover glass 100 and is disposed to overlap the active area 210 of the display module 200 . An image output from the active area 210 of the display module 200 may be viewed by a user through the first area 110 of the cover glass 100 .

The second area 120 is an edge area (a border area) surrounding the central area of the cover glass 100 , and at least a portion thereof is disposed to overlap the view area 220 of the display module 200 . The second region 120 of the cover glass 100 may be disposed along the edge of the first region 110 . The second area 120 may be formed wider than the non-active area of the display module 200 to cover the outside of the display module 200 from the view area 220 of the display module 200 .

In the present embodiment, the first region 110 may have a substantially planar shape, and may have a first radius of curvature R1 (Radius of Curvature).

As described above, since the first region 110 according to the present embodiment has a shape close to a plane, an image output from the display module 200 and passing through the cover glass 100 can be recognized by the user without distortion.

The second region 120 of the cover glass 100 is formed with a second radius of curvature R2 different from the first radius of curvature R1, and the second radius of curvature R2 is greater than the first radius of curvature R1. formed large.

In this embodiment, the display module 200 is bonded to the lower surface of the cover glass 100 in a state in which it is in close contact, and in this case, the thickness of the cover glass 100 is minimized, so that the overall thickness of the display device 1 can be reduced. .

The cover glass 100 has a dome-shaped curve, so that when it is directly bonded to the display module 200, stress is not non-uniform due to the curved curvature of the cover glass 100. The cut portion 230 is formed at left and right positions in the longitudinal direction and upper positions in the width direction.

The cutting part 230 is cut in a round shape in the left and right longitudinal directions and the upper width direction of the rectangular display module 200 in the form shown in the drawing. For example, it is cut through a laser cutter (not shown). . The laser cutting machine is used when it is necessary to precisely cut with a precise width due to a narrow, constant, and excellent accuracy of cutting with a cutting machine using a laser.

The display module 200 has a cut portion 230 formed so that it is not unevenly stretched or compressed at the above-described position by the stress instantaneously applied by a bonding machine (not shown) when it is bonded to the cover glass 100 . The stress imbalance is resolved and the uniformity of stress according to the position can be kept constant, so the bonding stability is also improved, thereby reducing the process defect rate and improving the yield.

The cut portion 230 according to this embodiment is, for example, a first cut portion 232 cut in a round shape from the upper end portion P1 of the lower edge of the edge line 231 toward the lower edge portion P2 of the upper edge. , the second cut portion 234 cut in a round shape from the upper left edge (P3) to the upper right edge (P4) of the edge line (231), and the right edge of the edge line (231) It includes a third cutout 236 cut in a rounded shape from the lower end P5 toward the upper end P6 of the lower right edge. For reference, A indicates an existing edge line.

The display module 200 avoids the position where the stress is mainly concentrated in the position where the cover glass 100 is bonded and the bonding is performed at the positions where the first to third cut parts 232 , 234 , 236 are formed, so that the stress is uniformly applied. In this dispersed state, the bonding force by direct bonding with the cover glass 100 is stably maintained.

The first to third cut portions 232 , 234 , and 236 extend along a path that is cut roundly toward the inside of the viewing area 220 at each corner position of the edge line 231 .

The reason that the first to third cut portions 232 , 234 , and 236 are extended in this way is that when bonding to the cover glass 100 at the position (position A) shown by the solid line, the stress is unevenly distributed, so that the stress The uniformity is not maintained stably, so it has a round and extended path as above.

The first and third cut portions 232 and 236 according to an embodiment are curved toward the view area (VA) 220 from the lower edge in the longitudinal direction of the edge line 231 to the central position. After extending, the degree of curvature may decrease from the central position toward the upper edge of the edge line 231 .

The reason that the first and third cut portions 232 and 236 are extended in this way is that stress is mainly non-uniform in the section extending in the left and right longitudinal directions of the edge line 231, so that the stress at the position is uniformly is to keep When the first and third cut portions 232 and 236 are extended to the positions shown by the dotted lines in this embodiment, the problem due to the stress non-uniformity when bonding with the cover glass 100 is solved, and the uniform stress distribution is maintained to ensure bonding stability This is improved.

The first and third cut portions 232 and 236 extend to be curved toward the view area (VA) 220 from the lower longitudinal edge P1 of the edge line 231 toward the central position. Then, it is cut in an elliptical shape in which the degree of curvature decreases from the central position toward the upper edge P2 of the edge line 231 .

The reason for this cut is that, in the case of a conventional rectangular flat display panel, the stress is not uniformly maintained along the edge line. In particular, there are cases where the stress is unevenly distributed in the left and right longitudinal directions of the edge line 231. The stress non-uniform position is mainly cut.

Since the position corresponds to the position where the main deformation occurs while causing a significant stress difference with the neighboring region where the stress is maintained relatively low, in this embodiment, the stress in the left and right longitudinal directions of the edge line 231 is The cut is curved toward the middle position of the viewing area 220 so as not to be concentrated.

Each corner position of the edge region 230 has relatively less stress concentration or non-uniformity compared to the middle position in the left and right longitudinal direction and the middle position in the upper width direction, so it is curved toward the view region 220 at the position. and the existing layout is maintained as it is.

The second cut portion 234 is curved from the upper left edge P3 of the edge line 231 toward the central position in the width direction toward the view area VA, and then extends toward the central position. It is cut in the shape of an ellipse in which the degree of curvature decreases as it goes to the upper right edge (P4).

The position of the second cut portion 234 is similar to the left and right sides of the above-described edge line 231, the stress may be concentrated or non-uniform, so as to extend to be curved as shown in the drawing.

Since the first to third cut portions 232 , 234 , and 236 are cut outside the active region 210 , they may be stably cut without affecting the stable driving of the display module 200 .

In addition, since the first cut part 232 and the third cut part 236 are cut in a left-right symmetrical shape with respect to the center of the upper surface of the display module 200 , the stress is applied to any position on the left or right side of the display module 200 . Fabrication can be achieved without being non-uniform or non-concentrated.

The cross-sectional view shown in FIG. 5 is a view showing a cross-sectional structure of the outer region of the display module 200 .

4 to 5 , the outer area of the display module 200 may include a portion of the active area AA 210 and the non-display area NA. Here, the non-display area NA corresponds to an area surrounding the outer edge of the aforementioned view area VA 220 .

The driving transistor DRT in each sub-pixel SP in the active area AA 210 may be disposed on the substrate 2110 . Here, the substrate 2110 may be a transparent substrate.

The driving transistor DRT may include a gate electrode G, a source electrode S, and a drain electrode D. The driving transistor DRT may further include a semiconductor layer SEMI or the like.

A gate insulating layer GI is positioned between the gate G and the semiconductor layer SEMI. The source electrode S may be formed on the insulating layer INS and connected to one side of the semiconductor layer SEMI through a hole. The drain electrode D may be formed on the insulating layer INS and connected to the other side of the semiconductor layer SEMI through a hole.

The light emitting device ED, which is an organic light emitting diode (OLED), is formed on a sub pixel electrode SPE corresponding to an anode electrode, a light emitting layer EL formed on the sub pixel electrode SPE, and a light emitting layer EL, A common electrode CE corresponding to the cathode electrode may be included. As another example, the sub-pixel electrode SPE may be an anode electrode, and the common electrode CE may be a cathode electrode.

The sub-pixel electrode SPE may be electrically connected to the drain electrode D of the driving transistor DRT exposed through the planarization layer hole PLN_CH in the first planarization layer PLN1 .

The emission layer EL is formed on the sub-pixel electrode SPE of the emission area PA provided (exposed) by the bank BANK. For example, the emission layer EL may have a stack structure including a hole-related layer, an emission layer, and an electron-related layer. The common electrode CE may be formed to face the sub-pixel electrode SPE with the emission layer EL interposed therebetween.

Since the light emitting device ED may be vulnerable to moisture or oxygen, an encapsulation layer 2120 is formed to prevent exposure to moisture or oxygen. The encapsulation layer 2120 may be formed of one layer, but may also include a plurality of layers PAS1, PCL, and PAS2, but is not limited thereto.

For example, when the encapsulation layer 2120 includes a plurality of layers PAS1, PCL, and PAS2, the encapsulation layer 2120 includes one or more inorganic encapsulation layers PAS1 and PAS2 and at least one organic encapsulation layer PCL. can do. The encapsulation layer 2120 may have a structure in which the first inorganic encapsulation layer PAS1, the organic encapsulation layer PCL, and the second inorganic encapsulation layer PAS2 are sequentially stacked.

The first inorganic encapsulation layer PAS1 is disposed on the common electrode CE and is disposed closest to the light emitting device ED. The first inorganic encapsulation layer PAS1 may be formed of an inorganic insulating material capable of low-temperature deposition.

For example, the first inorganic encapsulation layer PAS1 may be made of silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al2O3). Since the first inorganic encapsulation layer PAS1 is deposited in a low temperature atmosphere, during the deposition process, the first inorganic encapsulation layer PAS1 may prevent the light emitting layer EL including an organic material vulnerable to a high temperature atmosphere from being damaged.

The organic encapsulation layer PCL may have a smaller area than the first inorganic encapsulation layer PAS1 . In this case, the organic encapsulation layer PCL may be formed to expose both ends or both sides of the first inorganic encapsulation layer PAS1 . The organic encapsulation layer PCL may serve as a buffer for relieving stress between layers due to bending of the display device 100, which is an organic light emitting display device. For example, the organic encapsulation layer (PCL) may be an acrylic resin, an epoxy resin, polyimide, polyethylene, or silicon oxycarbon (SiOC), and may be formed of an organic insulating material. The material of the organic encapsulation layer PLC is not limited thereto.

If the polarization layer (POL) (refer to FIG. 5) polarizes and reflects light, in this case, the user's glare or light blur may be reduced.

In order to prevent the liquid encapsulation layer 2120 from collapsing during the manufacturing process, the display module 200 may arrange one or more dams DAM1 and DAM2 in the outer region of the encapsulation layer 2120 .

The display module 200 includes an encapsulation layer 2120 disposed on the plurality of light emitting areas PA and the transmissive area and positioned on the common electrode CE, and a dam DAM positioned outside the encapsulation layer 2120 . may include The encapsulation layer 2120 includes an inclined surface 2300 at the outside.

In the display module 200 configured as described above, the cutting portion 230 is positioned at an intermediate position or width in the longitudinal direction of the edge line 231 at an intermediate position in the longitudinal direction of the view area VA 210 or at an intermediate position in the width direction. It can be cut up to a first cutting distance L spaced apart to an intermediate position in the direction.

The first cutting distance L may be any one cutting distance selected from 50um to 450um, and for example, the first cutting distance L may be cut to 450um.

In this case, it can be seen that the stress generated in the display module 200 is maintained at a minimum of 0.062 and a maximum of 2.233, which is significantly improved than before.

6 to 7 , the second cut portion 234 is an ellipse while looking at the view area 220 from the P3 position toward the P4 position so that the stress non-uniformity that may occur in the upper width direction of the display panel 200 is reduced. The trajectory to be cut in the shape is maintained.

For reference, an edge line shown as a thin line represents an existing edge line shown for comparison with the present embodiment.

The third cut portion 236 according to the present embodiment maintains a trajectory cut in an elliptical shape while looking at the view area 220 from the P5 position toward the P6 position like the second cut portion 234 .

The reason that the cutting is possible in this way is that it is possible to cut with a minimum width in the shape to be cut accurately using a laser cutter.

A method of cutting the display device according to the present exemplary embodiment will be described with reference to the accompanying FIGS. 8 to 12 . For reference, it should be noted that the drawings shown in FIGS. 10 to 11 are diagrams conceptually illustrating a step in which laser cutting is performed. In addition, a cutting method using a laser cutter is used for ketting.

To this end, the present embodiment provides a first step (ST100) of recognizing an interface by moving the optical equipment along the outer edge of the display module, and a second step in which cutting is performed along the position where the stress non-uniformity occurs when the display module is assembled. and a third step (ST300) in which the cut pieces are separated from the display module (ST200).

In the first step ST100, a recognition device such as a camera recognizes the interface between the glass substrate and the POL (polarization layer) while moving along the upper edge of the display module 200 .

And, after the camera recognition of the display panel 200 is finished, the laser cutting machine is cut along the path of the above-described cutting part. As the laser cutter, a carbon dioxide laser cutter may be used or other laser cutters may be used.

The display panel 200 is moved along the movement path of the dotted line after the laser cutting is finished, after the gripper G, which is provided separately, grips the pre-cut cutting pieces 2 at both ends of the display module 200 on the left and right. If you move it to a separate location afterward, the job is finished.

As described above, an embodiment of the present invention has been described, but those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. It will be possible to variously modify and change the present invention by, etc., which will also be included within the scope of the present invention.

100: cover glass
200: display module
210: active area
220 : view area
230: cut part
231: edge line
232, 234, 236: first, second, third cut
300: case

Claims (11)

a cover glass 100 formed in a dome type;
An active area (AA) 210 coupled to the lower surface of the cover glass 100 in which activated data is displayed, a view area (VA) 220 visible to the user, and the a display module 200 including an edge line 231 spaced apart from the view area 220 to form an outer edge; and
A case 300 coupled to the lower surface of the cover glass 100 and accommodating the display module 200,
When the display module 200 is bonded to the cover glass 100 , a cutout 230 is formed along a position where the stress non-uniformity occurs in the display module 200 . According to claim 1,
The cover glass 100 may include a first region 110 having a first radius of curvature;
and a second region 120 extending outwardly along the edge of the first region 110 and having a second radius of curvature,
The display device, characterized in that the cut portion (230) is cut within a section constituting the second region (120). According to claim 1,
The cut portion 230 includes a first cut portion 232 cut in a rounded shape from the upper end of the lower edge of the edge line 231 toward the lower end of the upper edge;
a second cut portion 234 cut in a round shape from the upper left edge of the edge line 231 toward the upper right edge;
and a third cutout 236 cut in a rounded shape from a lower end of a right edge of the edge line 231 toward an upper end of the lower right edge. 4. The method of claim 3,
The first to third cut portions 232 , 234 , and 236 are roundly cut from the outside of the edge line 231 toward the inside of the view area 220 . The method of claim 1,
The first and third cut portions 232 and 236 are curved from the lower edge of the edge line 231 in the longitudinal direction toward the central position and curved toward the view area VA, and then at the central position. A display device in which a degree of curvature decreases toward an upper edge of the edge line 231 . 4. The method of claim 3,
The second cut part 234 is curvedly extended toward the view area (VA) 220 from the upper left edge of the edge line 231 toward the central position in the width direction, and then extends to the central position. A display device in which the degree of curvature decreases toward the upper right edge of the . 4. The method of claim 3,
The first cut portion 232 and the third cut portion 236 are cut in a left-right symmetrical form with respect to the center of the upper surface of the display module 200 . 7. The method of claim 6,
The cut portion 230 is a first cutting distance spaced apart from the intermediate position in the longitudinal direction or the intermediate position in the width direction of the viewing area 220 to the intermediate position in the longitudinal direction or the intermediate position in the width direction of the edge line 231 (L) Cuttable display device. 9. The method of claim 8,
The first cutting distance L is any one cutting distance selected from 50um to 450um. 9. The method of claim 8,
The first cutting distance L is 450um. A first step of recognizing the boundary surface by moving the optical equipment along the outer edge of the display module (ST100);
a second step (ST200) of cutting along a position where the stress non-uniformity occurs when the display module is assembled; and
and a third step (ST300) of separating the cut cutting pieces from the display module.

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