KR20140136725A - Method and apparatus for processing panel - Google Patents

Method and apparatus for processing panel Download PDF

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Publication number
KR20140136725A
KR20140136725A KR1020130057151A KR20130057151A KR20140136725A KR 20140136725 A KR20140136725 A KR 20140136725A KR 1020130057151 A KR1020130057151 A KR 1020130057151A KR 20130057151 A KR20130057151 A KR 20130057151A KR 20140136725 A KR20140136725 A KR 20140136725A
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KR
South Korea
Prior art keywords
panel
corner
angle
corners
polishing
Prior art date
Application number
KR1020130057151A
Other languages
Korean (ko)
Inventor
박형진
김종학
Original Assignee
(주)미래컴퍼니
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)미래컴퍼니 filed Critical (주)미래컴퍼니
Priority to KR1020130057151A priority Critical patent/KR20140136725A/en
Publication of KR20140136725A publication Critical patent/KR20140136725A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass

Abstract

A panel processing method and a processing apparatus are disclosed. A method of processing a corner of a panel by transferring a panel in a predetermined traveling direction, comprising the steps of: (a) loading a panel; (b) in response to a machining angle of the corner, And (c) moving the panel so that the corner passes through the polishing wheel so as to allow the corner to be machined at a machining angle. The panel processing method includes fixing the panel to a predetermined position Instead of polishing the corner of the panel by moving the corner cut wheel in the vertical direction, the corner polishing is performed in such a manner that the panel is rotated and the both corners are exposed so that the panel is brought into contact with the polishing wheel, The corner of the panel can be machined using a single grinding wheel without having to replace the grinding wheel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a panel processing method and a processing apparatus.

Flat panel displays such as liquid crystal display (LCD) panels and the like use flat panel glass panels. In the case of solar cells, transparent panels such as glass materials are used as substrates. Accordingly, a glass panel is cut in the process of manufacturing an LCD panel or a solar cell, and a process of polishing the cut edges and corner portions is performed.

In order to polish the edges and corners of the glass panel in this way, conventionally, a glass panel is loaded on the polishing table and the polishing table is moved along the transfer line so that the panel passes through the edge / corner polishing wheel, Polishing the edge / corner, and then unloading the panel mounted on the polishing table.

In the case of conventional corner polishing, the lower wheel (or the upper wheel) of the polishing wheels disposed in the upper and lower two rows is raised (or lowered) for corner cutting and is then waiting for a front corner cut and is lowered After completing the edge polishing, it was operated in such a manner that the rear corner cut was performed by rising (or descending) again.

That is, in the case of conventional corner polishing, first, the object to be processed is transferred in the advancing direction (Y-axis direction), and the amount of deviation is measured in an arrangement unit (Align Unit) , And moves and rotates in the C axis to align the panel.

Next, in a state where the aligned target finished panel is positioned at the polishing position, the polishing wheel is moved in the vertical direction (Z-axis direction) while the polishing wheel is close to the panel by the amount of corner polishing to perform corner polishing. In this case, the shape of the grinding wheel is determined according to the shape of the corner to be polished.

In the case of such conventional corner polishing, since a control system for linearly transferring a structure such as a table or a grinding wheel is adopted in each of the axes, it is possible to use the control method of FIG. 7 (corner cut wheel for chamfering) or FIG. 8 (corner cutting wheel for round machining) As shown, there is a limit to that the shape of the grinding wheel must be changed as the shape of the corner to be machined varies.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Korean Patent Laid-Open Publication No. 10-2011-0058734 discloses a glass substrate processing method in which a chamfering process is performed immediately without aligning a glass substrate. In Korean Patent Laid-Open No. 10-2009-0013010, And Korean Patent Laid-Open Publication No. 10-2012-0013929 discloses a polishing apparatus in which a groove shape of a polishing wheel is detected and polishing of a glass substrate is controlled to improve the quality of the edge polishing, Device is disclosed.

Patent Document 1: Korean Patent Publication No. 10-2011-0058734 Patent Document 2: Korean Patent Laid-Open No. 10-2009-0013010 Patent Document 3: Korean Patent Publication No. 10-2012-0013929

The present invention provides a panel machining method and a machining apparatus that do not require replacement of a grinding wheel even when the machining shape of a corner changes.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided a method of processing a corner of a panel by transporting a panel in a predetermined traveling direction, comprising the steps of: (a) loading a panel; (b) Rotating the panel such that the panel is exposed on both sides with respect to the advancing direction; and (c) conveying the panel so that the corners pass through the polishing wheel so that the corners are machined to a machining angle. / RTI >

Step (a) may comprise aligning the panel to a predetermined reference position.

(B) chamfering the panel by a chamfer angle with respect to the corner, wherein step (c) comprises grinding the polishing wheel toward the panel by a distance from the vertex of the corner to the chamfer processing line The method comprising the steps of:

The corners are machined into a round shape and the machining angle is calculated from the angle formed by the line connecting the end points of the round shape to the edge of the panel, step (c) And allowing the grinding wheel to follow the round shape by spacing it away.

Wherein step (a) includes loading a plurality of panels, wherein step (b) comprises rotating all of the plurality of panels by a machining angle, wherein step (c) In order to achieve the desired result.

According to another aspect of the present invention, there is provided a method of manufacturing a plasma display panel, including a table for loading a panel to be subjected to corner machining, a transfer unit for moving the table to transfer the panel in a predetermined traveling direction, And a grinding wheel which is brought into contact with the corners in the course of feeding the panel and which allows the corners to be machined at a machining angle, wherein the panel is rotated so that the corners are exposed on both sides in accordance with the machining angle, Is provided.

And a aligning unit that aligns the panel with a predetermined reference position by activating the transferring unit and / or the rotating unit.

The corner is chamfered and the rotating part rotates the panel by a chamfer angle with respect to the corner, and the grinding wheel can be positioned at a position closer to the panel by the distance from the vertex of the corner to the chamfer processing line.

The corner is machined into a round shape and the machining angle is calculated from the angle formed by the line connecting the end points of the round shape to the edge of the panel and the grinding wheel is moved toward or away from the panel Can be controlled to be spaced apart.

A plurality of tables are provided, and the transferring unit sequentially transfers a plurality of panels loaded on each of the plurality of tables so as to be in contact with the abrasive wheel, and the rotating unit can rotate all of the plurality of panels by a machining angle.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, instead of polishing the corners of the panel by moving the corner cut wheel in the vertical direction while fixing the panel at a predetermined position, the panel is moved in such a manner that both corners are exposed, Since the corner polishing is performed in such a manner as to contact the wheel, even if the machining shape of the corner is changed, it is possible to process the corner of the panel by using one polishing wheel without changing the polishing wheel.

In addition, it is possible to perform corner cutting processing (chamfering processing, round processing) while sequentially transferring a plurality of panels, thereby reducing the overall tact time of the corner cutting processing.

Further, by controlling the direction of the panel (C-axis rotation) and the position of the polishing wheel (X, Y axis movement), it is possible to perform chamfering and rounding of various shapes without tool change with one polishing wheel.

1 is a flowchart showing a panel processing method according to an embodiment of the present invention;
2 is a view illustrating a chamfering process according to an embodiment of the present invention.
3 is a view illustrating a chamfering process according to another embodiment of the present invention.
4 is a view illustrating a round shape machining process according to an embodiment of the present invention.
5 is a view illustrating a process for a plurality of panels according to an embodiment of the present invention.
6 is a perspective view showing a panel processing apparatus according to an embodiment of the present invention.
7 is a sectional view showing a part of a polishing wheel for chamfering according to the prior art.
8 is a cross-sectional view showing a part of a polishing wheel for round machining according to the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, .

2 is a view illustrating a chamfering process according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a chamfer according to another embodiment of the present invention. Referring to FIG. 1, FIG. 4 is a view illustrating a round shape machining process according to an embodiment of the present invention, and FIG. 5 is a view illustrating a machining process for a plurality of panels according to an embodiment of the present invention. Referring to Figures 1-5, a panel 10, a grinding wheel 130, is shown.

The present embodiment is characterized by a panel processing technique capable of controlling the amount of corner cut polishing of the panel by moving the polishing wheel in the X and Y axis directions or by rotating the table in the C axis independently of the shape of the polishing wheel .

In describing the panel processing method and apparatus according to the present embodiment, it is assumed that the advancing direction of the panel is set in the direction of the " Y axis ", and the angle at which the corners of the panel are processed, 'A', a rotation axis for rotating the panel is referred to as a 'C' axis, and a direction for moving the polishing wheel in a direction approaching or away from the panel is referred to as an 'X axis' direction.

The corner cut polishing method of the panel according to the present embodiment is a method in which the panel to be processed 10 is first transferred in the Y axis direction while the component (alignment portion) After measuring the amount, the table is moved in the X and Y axis directions, or the table is rotated around the C axis to align the panel 10 with the reference position.

The panel 10 having been aligned in this way is not moved to the polishing position simply as in the conventional case but the panel 10 is rotated about the C axis in accordance with the polishing shape of the corner, To be exposed. The panel 10 is rotated in an oblique direction in accordance with the processing angle of the corner when the direction of the panel 10 (Y-axis direction) is taken as a reference.

Next, after the polishing wheel 130 is moved in the panel direction (X-axis direction) by the amount to be polished, the panel 10 is moved in the advancing direction with the corners to be polished exposed on both sides, ) Are polished.

Thus, unlike the conventional corner machining method in which the shape of the grinding wheel has to be changed when the shape of the corner to be machined is changed due to the restriction of the control system in which the corner grinding wheel must be linearly transferred in each axial direction, Even if the corner machining shape of the panel 10 is changed by controlling the combination of the angle for rotating the panel 10 and the movement of the panel 10 in the Y axis direction and the movement of the grinding wheel 130 in the X axis direction, The need to change the wheel is eliminated.

The panel processing method according to the present embodiment is a method for transferring the panel 10 in the traveling direction (Y-axis direction) so that the corners of the panel 10 are chamfered or rounded. To this end, (S100).

When the processing apparatus according to the present embodiment is configured as shown in FIG. 6, in the process of loading the panel 10, the corner polishing target panel 10 is placed on the support table 100, And fixing the panel 10 to the table 100. [

After the panel 10 is loaded, the process of aligning the panel 10 to the reference position may be performed before performing corner processing (S110). The alignment of the panel 10 may be preceded in order to reduce the error of the panel machining because the table 100 or the grinding wheel can be moved by a predetermined distance on the assumption that the panel 10 is properly loaded at the reference position.

In the process of aligning the panel 10, the state of the panel 10 is first photographed by vision or the like to determine the current position, a difference between the predetermined reference position and the current position is derived, And / or rotating the panel 10 such that the panel 10 coincides with the reference position.

Next, the panel 10 is rotated by an angle at which the corners are to be machined so that the corners to be machined are exposed on both sides with respect to the traveling direction (S200). Conventionally, when the alignment of the panel 10 is completed, the corner polishing is performed by moving the panel 10 to a predetermined polishing position. However, unlike the conventional method, in this embodiment, before the panel 10 is transferred ) Of the panel 10 is rotated, and the panel 10 is rotated obliquely with respect to the advancing direction.

That is, the panel 10 is rotated as shown in FIGS. 2 and 3. The angle at which the panel 10 is rotated corresponds to the angle of the panel 10 with respect to the corner.

For example, when chamfering the corners of the panel 10, the panel 10 can be rotated by a chamfer angle in this embodiment (S210).

In the case shown in Fig. 2, the chamfering is performed at an angle of 45 degrees with respect to the edge line of the panel 10, and at this time, the panel 10 can be rotated by 45 degrees around the C axis .

In the case shown in Fig. 3, the corner is chamfered at an angle of 23.2 degrees with respect to the edge line of the panel 10. At this time, the panel 10 is moved 23.2 degrees (or 66.8 degrees -23.2)).

That is, the rotation angle of the panel 10 according to the present embodiment can be determined according to the shape of the corner to be processed, and the rotation angle of the panel 10 is determined so that the chamfering line is formed on the panel 10 (The Y-axis direction) of the Y-axis.

In this case, the processing angle of the corner is determined by the angle formed by the line connecting the end points of the round shape with the edge of the panel 10, that is, Assuming that the chamfering is performed along the line connecting both ends of the round shape, the angle of the assumed chamfering line can be calculated as the machining angle of the rounding (S220).

As the panel 10 is rotated so that the chamfering line is aligned with the advancing direction of the panel 10, the panel 10 is moved in the advancing direction so that the corner of the panel 10 contacts the grinding wheel 130 The corner of the panel 10 can be machined by a chamfer angle (S300).

The position of the grinding wheel 130 when chamfering the corners of the panel 10 will be described so that the chamfering process can be performed while the panel 10 passes over the grinding wheel 130, The polishing wheel 130 may be positioned close to the panel by a distance from the vertex of the corner to the chamfer processing line at step S310.

On the other hand, in the case of rounding the corners of the panel 10, it is difficult to fix the grinding wheel 130 at a specific position as in the case of chamfering described above, and as shown in Fig. 4, (Grinding wheel 'interpolation operation') so that the grinding wheel 130 is also moved in the X axis direction (close to or away from the panel 10) while passing over the polishing pad 130 in contact therewith .

As such, by controlling the grinding wheel 130 in the manner that the grinding wheel 130 is brought close to, apart from, and brought closer to the panel 10 while the corners of the panel 10 pass the grinding wheel 130, By moving the polishing wheel 130 to follow the round shape, the corner can be processed into a round shape.

That is, when the corners according to the present embodiment are rounded, the polishing wheel 130 may be controlled so as to follow the round shape of the corners (closer to or away from the panel) (S320).

Meanwhile, the panel 10 according to the present embodiment can process corners of a plurality of panels at a time by transferring the polishing wheel 130 through the polishing wheel 130 sequentially in a plurality of loaded states as shown in FIG.

In this case, as shown in Fig. 5, all of the plurality of panels 10 to be loaded can be sequentially transferred to contact with the grinding wheel 130 while being rotated by a machining angle.

As described above, according to the panel processing method of this embodiment, it is possible to simultaneously process the corners of a plurality of panels, thereby shortening the overall tact time.

6 is a perspective view showing a panel processing apparatus according to an embodiment of the present invention. Referring to FIG. 6, a panel 10, a table 100, a transfer unit 110, a rotation unit 120, a polishing wheel 130, and an alignment unit 140 are shown in FIG.

6, the 'Y axis' represents the conveying axis of the panel to be processed, and the 'X axis' represents the distance for moving the polishing wheel in the panel direction or closer to the panel Axis is a movement axis for moving the grinding wheel in the vertical direction, and the 'C axis' is a rotation axis of the panel to be processed.

The panel processing apparatus according to the present embodiment may include a table 100, a transfer unit 110, a rotation unit 120, and a grinding wheel 130.

The table 100 is a constituent element for loading the panel 10 to be subjected to corner processing and includes a flat plate for mounting the panel 10 and a vacuum suction line for fixing the panel 10 .

The transfer unit 110 is a component for moving the table 100 in the Y axis direction and consequently the panel 10 loaded on the table 100 to be transferred along the moving direction. The transfer unit 110 includes a linear motor, a ball screw such as a ball screw, a driving motor, a guide rail, and the like, to move the object (table 100) in a linear direction.

The rotary part 120 rotates the table 100 around the C axis and consequently rotates the panel 10 by a working angle so that the corners of the panel 10 are exposed on both sides with respect to the traveling direction, And may include various members or devices for rotating the object (table 100) such as a bearing, a driving motor, and a gear.

The grinding wheel 130 is a component that contacts the corners of the panel 10 and polishes the corners. For example, a disc-shaped grinding wheel may be used as the grinding wheel 130 according to the present embodiment, And the corners of the panel 10 to be conveyed are brought into contact with the outer circumferential surface of the grinding wheel so as to be polished so that the corners can be processed into a desired shape and angle.

As described above, the process of aligning the panel 10 to the reference position may be performed prior to performing the corner machining after the panel 10 is loaded. To this end, the machining apparatus according to the present embodiment includes the aligning unit 140 ) May be further provided.

The alignment unit 140 includes a processor for calculating a difference between a vision for photographing the loading state of the panel 10, a predetermined reference position and a current photographed position, a processor for calculating a difference between a current position and a reference position, And / or a driving unit that moves and / or rotates the substrate.

In this case, the above-described conveyance unit 110 may be operated to move the panel 10, and the above-described rotation unit 120 may be operated to rotate the panel 10. [ That is, the transfer unit 110 and the rotation unit 120 described above may function as one component of the alignment unit 140 according to the present embodiment.

When chamfering the corners of the panel 10 according to the present embodiment, the panel 10 is moved in the advancing direction in a state in which the panel 10 is rotated by a chamfer angle as described above. For this purpose, The turning unit 120 may rotate the panel 10 by a chamfer angle and the grinding wheel 130 is moved to the panel by the distance from the vertex of the corner to the chamfering line so that its surface coincides with the chamfering line So that the grinding wheel 130 can be positioned at a close position.

In the case of rounding the corners of the panel 10 according to the present embodiment, as described above, the angle at which the panel 10 is rotated, that is, the processing angle, Can be calculated from the angle with the edge.

In this case, the grinding wheel 130 may be operated in such a manner that it is moved toward or away from the panel to follow the round shape.

As described above, the panel according to the present embodiment can be processed into a plurality of tables. For this, a plurality of tables 100 may be provided in the processing apparatus according to the present embodiment.

In this case, the transfer unit 110 may sequentially transfer the plurality of panels loaded on the plurality of tables 100, respectively, so as to be brought into contact with the polishing wheel 130, respectively.

In addition, as shown in FIG. 5, the rotating unit 120 according to the present embodiment can rotate all of the plurality of panels by the machining angle so that all the loaded panels are sequentially transferred while being rotated by the machining angle.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

10: Panel 100: Table
110: feeder 120:
130: polishing wheel 140:

Claims (10)

A method of processing corners of a panel by transferring panels in a predetermined direction,
(a) loading the panel;
(b) rotating the panel so that the corners are exposed on both sides of the advancing direction, corresponding to the machining angle of the corners; And
(c) transferring said panel such that said corner passes through contact with said polishing wheel, such that said corner is machined at said machining angle.
The method of claim 1, wherein the step (a)
And aligning the panel to a predetermined reference position.
The method according to claim 1,
The corners are chamfered,
Wherein step (b) comprises rotating the panel by a chamfer angle relative to the corner,
Wherein the step (c) comprises bringing the grinding wheel closer to the panel by a distance from a vertex of the corner to a chamfering line.
The method according to claim 1,
The corner is machined into a round shape,
The machining angle is calculated from an angle formed by a line connecting the two end points of the round shape to an edge of the panel,
Wherein the step (c) comprises causing the grinding wheel to follow the round shape by bringing the grinding wheel closer to or away from the panel.
The method according to claim 1,
Wherein said step (a) comprises loading said panel in plurality,
Wherein the step (b) comprises rotating all of the plurality of panels by the machining angle,
Wherein the step (c) includes sequentially transferring the plurality of panels to be processed.
A table for loading a panel to be processed in a corner;
A transporting unit for moving the table so that the panel is transported in a predetermined traveling direction;
A rotating part coupled to the table and rotating the panel such that the corner is exposed on both sides of the traveling direction in correspondence with the machining angle of the corner;
And a polishing wheel which is brought into contact with the corner in the course of feeding the panel so that the corner is machined at the machining angle.
The method according to claim 6,
Further comprising an aligning portion for operating at least one of the conveying portion and the rotating portion so that the panel is aligned with a predetermined reference position.
The method according to claim 6,
The corners are chamfered,
The rotation unit rotates the panel by a chamfer angle with respect to the corner,
Wherein the grinding wheel is positioned at a position close to the panel by a distance from a vertex of the corner to a chamfering line.
The method according to claim 6,
The corner is machined into a round shape,
The machining angle is calculated from an angle formed by a line connecting the two end points of the round shape to an edge of the panel,
Wherein the polishing wheel is controlled so as to be close or spaced toward the panel so as to follow the round shape.
The method according to claim 1,
The plurality of tables are provided,
Wherein the transfer unit sequentially transfers a plurality of the panels loaded on each of the plurality of tables to be in contact with the polishing wheel,
Wherein the rotating portion rotates all of the plurality of panels by the machining angle.
KR1020130057151A 2013-05-21 2013-05-21 Method and apparatus for processing panel KR20140136725A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9823518B2 (en) 2015-11-30 2017-11-21 Samsung Electronics Co., Ltd. Display device and electronic device including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9823518B2 (en) 2015-11-30 2017-11-21 Samsung Electronics Co., Ltd. Display device and electronic device including the same

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