CN108492718B - Display device and bending device for manufacturing the same - Google Patents
Display device and bending device for manufacturing the same Download PDFInfo
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- CN108492718B CN108492718B CN201810217619.6A CN201810217619A CN108492718B CN 108492718 B CN108492718 B CN 108492718B CN 201810217619 A CN201810217619 A CN 201810217619A CN 108492718 B CN108492718 B CN 108492718B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display device and a bending device for manufacturing the same. The bending apparatus includes: a base including a mounting surface for configuring a display device; a stage for clamping a portion of the display device connected to a curved portion of the display device and moving in a direction opposite to a direction in which the curved portion extends from the display device to form a curvature on the curved portion; and a bending portion for bending and pressing the bending portion, wherein the base or the bending portion is configured to be movable with respect to each other.
Description
This application is a divisional application of an invention patent application having a parent application number of 201510145780.3 (application date: 2015, 3/30, entitled display device and bending apparatus for manufacturing the same).
Technical Field
The present invention relates to a bending apparatus capable of bending a part of a display apparatus for displaying an image and a display apparatus manufactured by the same.
Background
Among display devices, a flexible display device (flexible display device) that realizes pixels on a thin flexible substrate (flexible substrate) such as plastic has an advantage of displaying a desired image even when folded or rolled like paper has attracted attention as a next-generation display device.
The flexible display device is widely used not only in a monitor of a computer and a television but also in a personal portable device. Accordingly, research into a flexible display device having a reduced volume and weight while having a wide display area is being conducted. In particular, since an Organic Light Emitting Display (OLED) does not require an additional Light source unlike a Liquid Crystal Display (LCD), a relatively thin thickness can be achieved, and efforts to manufacture the Organic Light Emitting Display as a flexible Display device are continuously ongoing at this point.
However, there are problems as follows: there is no bending (bending) device for folding or rolling a flexible display panel, which is a main structural element of the flexible display device according to design, so far.
Further, there are problems as follows: when an operator performs such a bending process of the display panel by a manual manner, the operator cannot fold the display panel in an accurate shape according to a design value, and the production efficiency is lowered due to a reduction in process efficiency.
Moreover, there are problems as follows: the quality of the display panel is not uniform depending on the proficiency of the operator in the bending process.
Namely, there are the following problems: when the flexible substrate is bent by hand, it is not easily bent so that the bent portion of the flexible substrate has a desired radius of curvature. In particular, the following problems arise: an excessive force is applied to the flexible substrate having flexibility to cause physical and electrical damage to the flexible display.
Thus, there is a continuing need for a bending apparatus as follows. The bending apparatus can accurately bend a bent portion of the flexible substrate to have a desired radius of curvature, and can minimize physical and electrical damage to the flexible display device.
Disclosure of Invention
The present invention has been made to solve the above-described conventional problems, and it is an object of the present invention to provide a bending apparatus capable of bending a part of a display device without damaging a display panel.
Another object of the present invention is to provide a bending apparatus capable of bending a portion of a display panel to reduce a frame (bezel) width of the display apparatus.
Further, the present inventors have invented a bending apparatus of a new structure capable of bending a substrate so that a bent portion of the substrate has a desired radius of curvature and minimizing physical and electrical damage to a flexible display device.
Accordingly, another object of the present invention is to provide a bending apparatus capable of easily bending a substrate.
Another object of the present invention is to provide a bending apparatus capable of bending a bent portion of a substrate to have a desired radius of curvature.
Another object of the present invention is to provide a bending apparatus for a flexible display device capable of bending an edge while minimizing physical and electrical damages of the flexible display device.
The problems to be solved by the embodiments of the present invention are not limited to the above-mentioned problems, and other problems not mentioned above will be clearly understood by those skilled in the art to which the present invention pertains from the following descriptions.
The bending apparatus of an embodiment of the present invention includes: a base including a mounting surface for configuring a display device; a stand for holding a portion of the display device connected to a bent portion of the display device; and a bending part for bending and pressing the bending part. Further, the base or the bending portion is configured to be movable with respect to each other.
According to another feature of the invention, the curved portion may comprise: a protrusion protruding toward the stage for bending and pressurizing the bent portion; and a protrusion moving device for moving the protrusion to a curved portion of the display device disposed on the mounting surface.
According to another feature of the invention, the projection may comprise: a support surface formed in a shape having a curvature for contacting the curved portion and bending the curved portion; and a pressing surface for applying a pressing force to the bent portion.
According to a feature of the present invention, the bending part may further include: and a pad member coupled to the pressing surface.
According to another feature of the present invention, the bending part may further include: and a contact member contacting at least one of the first substrate and the at least one panel driving part.
According to another feature of the present invention, the contact member may be configured to press the first substrate in a state where the first substrate is bent.
According to another feature of the present invention, the contact member may be configured to be movable in a direction perpendicular to a moving direction of the base.
According to another feature of the present invention, when the display device includes a plurality of panel driving parts, the contact member may be configured to move between the plurality of panel driving parts and separate the plurality of panel driving parts in different directions from each other.
According to another feature of the present invention, the contact member may further include: a pressing surface for pressing the first substrate and a pad member coupled to the pressing surface.
According to another feature of the present invention, the stage may further include a clamp portion to form a curvature on the curved portion by moving the clamp portion clamping a portion of the display device.
According to another feature of the invention, the clamp portion may comprise: a first clamp for supporting a portion of the display device; and a second clamp for moving toward the first clamp and clamping a portion of the display device.
According to another feature of the present invention, the clamping portion may further include: and a pad member coupled to regions of the first and second jaws that face each other.
According to another feature of the present invention, the base forms the curvature on the curved portion by moving a portion of the display device sandwiched by the stages in a direction adjacent to the curved portion.
According to another feature of the present invention, a base station may include: and a fixing device for fixing the display device arranged on the mounting surface.
According to another feature of the present invention, the fixing means may be constituted by a groove portion corresponding to the shape of the display device.
According to another feature of the invention, the fixing means may comprise: at least one suction hole formed on the base; and an inhaler for inhaling air from the inhalation port.
According to another feature of the present invention, there may be further included: and a position checking unit for checking the arrangement of the display device on the mounting surface.
A display device of another embodiment of the present invention includes: a first substrate having a curved portion; a second substrate opposite to the first substrate; a first panel driving part attached to a distal end of the first substrate; and a second panel driving part attached to the end of the second substrate. The first substrate is configured to be bent in the following manner: the bending device moves between the first and second panel driving parts to separate the first and second panel driving parts from each other and bend the first substrate along the bending portion.
According to another feature of the present invention, the first substrate may further include: the holding object is covered by the bent part of the first substrate.
According to another feature of the invention, the curved portion may be maintained at a radius of curvature by a shape-retaining substance.
The details of other embodiments are included in the detailed description and the accompanying drawings.
The display panel is bent by a bending device including a base, a stage, and a bending portion, thereby easily bending the edge of the display.
Since the display edge can be easily bent, the display device can be bent into an accurate shape according to the design value.
In addition, since the bending of the display edge is easily performed, the production efficiency can be improved while the quality of the display device is maintained to be equal.
In particular, since the bending of the display is performed by fine adjustment of the bending portion, it is not necessary to excessively perform the bending of the display, and a part of the display device can be bent without damaging the display panel.
In addition, since the stage tightly pulls the bent portion of the display, it is possible to bend a portion of the display device and make a bezel (bezel) width of the display device small.
The effects of the present invention are not limited to the effects mentioned, and other effects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the following description.
The contents of the invention described in the above-mentioned problems, solutions to the problems, and technical effects are not intended to limit the essential features of the claims, and therefore the scope of the claims is not intended to be limited to the contents described in the contents of the invention.
Drawings
Fig. 1a is a sectional view for explaining a display device that can be bent using the bending apparatus of the present invention.
Fig. 1b is a sectional view for explaining a bent state of the display device in fig. 1 a.
Fig. 2 is a perspective view showing a bending apparatus according to an embodiment of the present invention.
Fig. 3a, 3b, 3c, 3d and 3e are perspective views showing a driving sequence of the bending apparatus according to the embodiment of the present invention.
Fig. 4 is a perspective view showing a bending apparatus according to another embodiment of the present invention.
Fig. 5a, 5b, 5c, 5d, 5e, 5f, 5g and 5h are perspective views illustrating a driving sequence of a bending apparatus according to another embodiment of the present invention.
Fig. 6 is a perspective view showing a bending apparatus according to another embodiment of the present invention.
Fig. 7a, 7b, 7c, 7d, 7e, 7f, 7g and 7h are perspective views showing a driving sequence of a bending apparatus according to another embodiment of the present invention.
Fig. 8a is a sectional view for explaining a display device that can be bent using a bending apparatus according to another embodiment of the present invention.
Fig. 8b is a sectional view for explaining a bent state of the display device in fig. 8 a.
Fig. 9 is a perspective view showing a bending apparatus according to another embodiment of the present invention for bending the display apparatus shown in fig. 8a and 8 b.
Fig. 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i and 10j are perspective views showing a driving sequence of a bending apparatus according to another embodiment of the present invention.
Description of the reference numerals
100 display device 200 bending device
210, base station 220, stand
230 bending part 240 position checking part
Detailed Description
Advantages and features of the present invention, and methods for attaining them, will become apparent by reference to the drawings and detailed description which follow. However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various forms. The embodiments of the present invention have been disclosed in full, and are provided so that those skilled in the art can fully appreciate the scope of the present invention, which is defined by the scope of the appended claims.
The shapes, sizes, proportions, angles, numbers, and the like disclosed in the drawings for illustrating the embodiments of the present invention are merely examples, and the present invention is not limited to the illustrated ones. Like reference numerals refer to like elements throughout the specification. In the description of the present invention, detailed description is omitted when it is considered that detailed description of known techniques may make the gist of the present invention unclear.
When "including", "having", and "constituting" and the like are mentioned in this specification, other portions may be added as long as "only" is not used. With respect to structural elements described in the singular, unless specifically stated in the singular, the plural is encompassed.
In explaining the structural elements, the error range is interpreted to be included even if there is no additional plain text description.
When the positional relationship is described, for example, when the positional relationship of two portions is described as "up", "down", "beside", or the like, unless the expression "positive" or "direct" is used, it is indicated that there is a possibility that other portions are included between the two portions.
When a temporal relationship is described, for example, when temporal succession is described as "after", "next", "then", "before", or the like, it is possible to include a case where discontinuity is caused unless the expression "directly" or "directly" is used.
The terms first, second, etc. are used for describing different structural elements, but the structural elements are not limited to these terms. These terms are used only for distinguishing one constituent element from other constituent elements. Therefore, the first constituent element mentioned below may be the second constituent element within the scope of the technical idea of the present invention.
The "X-axis direction", "Y-axis direction", and "Z-axis direction" are not to be construed as merely being perpendicular geometric relationships to each other, but may mean having a wider directivity within a range in which the structure of the present invention can function.
The term "at least one" should be understood to include all combinations that may be suggested from more than one of the associated items. For example, the expression "at least one of the first item, the second item, and the third item" may indicate not only each of the first item, the second item, and the third item but also a combination of all items which can be suggested from two or more of the first item, the second item, and the third item.
Each feature of the plurality of embodiments of the present invention can be combined or combined partially or entirely, various interlocking and driving can be technically performed, and the respective embodiments can be implemented independently of each other or can be implemented together in a related relationship.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1a is a sectional view for explaining a display device that can be bent using the bending apparatus of the present invention. Fig. 1a shows the display device 100 before bending.
Referring to fig. 1a, the display device 100 includes a first substrate 110, a second substrate 120, an adhesive layer 130, a protective object 140, and a panel driving portion 150.
The first substrate 110 is a substrate for supporting each component of the display device 100. The first substrate may be made of a material having flexibility so as to be bendable, such as PI (polyimide), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate), PNB (polynorbornene), and PES (polyethersulfone).
As shown in fig. 1a, the first substrate includes a first portion P1, a bent portion BP extending from the first portion P1, and a second portion P2 extending from the bent portion BP. The first portion P1 of the first substrate includes a display portion EP displaying an image and a non-display portion NEP not displaying an image.
That is, the display panel may be a flexible display panel (flexible display panel) constituting a flexible display device (flexible display device). In the following description, a flexible organic light emitting display panel (flexible organic light emitting display panel) is assumed as a display panel.
Thus, the display panel includes the first substrate 110 and the second substrate 120 which are oppositely combined.
Although not shown in fig. 1a, a plurality of gate lines, a plurality of data lines, a plurality of driving power lines, a plurality of pixels, and a cathode power line are formed on an inner surface of a display portion EP for displaying an image.
Each of the plurality of gate lines is formed at a predetermined interval and intersects each of the plurality of data lines, and each of the plurality of driving power lines is formed in parallel with each of the plurality of gate lines or each of the plurality of data lines.
Further, each of the plurality of pixels is formed in a pixel region defined by gate lines and data lines crossing each other, and displays an image according to gate signals from the gate lines and data signals from the data lines.
In more detail, each of the plurality of pixels includes: a pixel driving circuit connected to the gate line, the data line and the driving power line; and an organic light emitting element connected to the pixel driving circuit and connected to the cathode power supply line.
Further, the pixel drive circuit includes: a switching transistor connected to the gate line and the data line; a driving transistor connected to the switching transistor and the driving power line; and a capacitor connected to the gate electrode and the source electrode of the driving transistor.
Here, each transistor may be formed of an a-Si TFT (thin film transistor), a poly-Si TFT (polycrystalline silicon thin film transistor), an Oxide TFT (Oxide thin film transistor), an Organic TFT (Organic thin film transistor), or the like.
Such a pixel driving circuit supplies a data signal supplied to a data line to a driving transistor by switching the switching transistor in accordance with a gate signal supplied to a gate line, stores a gate-source voltage of the driving transistor corresponding to the data signal in a capacitor, and turns on the driving transistor by the voltage stored in the capacitor, thereby supplying a data current corresponding to the data signal to an organic light emitting element.
In addition, the pixel driving circuit may further include at least one compensation transistor and at least one compensation capacitor for compensating for a threshold voltage of the driving transistor.
In addition, the organic light emitting element includes a first electrode (e.g., an Anode (Anode) electrode) connected to the driving transistor, an organic light emitting layer formed on the first electrode, and a second electrode (e.g., a Cathode (Cathode) electrode) formed on the organic light emitting layer.
Such an organic light emitting element emits light by a current flowing from the anode electrode to the cathode electrode with the driving transistor turned on, and emits light with luminance corresponding to the data current to the upper side of the second substrate 120.
In addition, the cathode power supply line may be formed on the entire surface of the display portion EP, or may be formed in a pattern shape on the display portion EP, and electrically connected to the cathode electrode of each pixel.
Also, the cathode power line may be formed to be electrically connected to the organic light emitting layer of each pixel, and in this case, the cathode electrode may be omitted.
In addition, the non-display portion NEP is disposed at a peripheral region of the display portion EP and covers the display portion EP, and the non-display portion NEP may be defined as an edge region of the second substrate 120, but is not limited thereto.
Also, a plurality of connection lines electrically connected to the plurality of gate lines, the plurality of data lines, the plurality of driving power lines, and the cathode power lines formed on the display portion EP may be formed at one side of the non-display portion NEP.
Although not shown in fig. 1a, a plurality of connection lines electrically connected to the plurality of gate lines, the plurality of data lines, the plurality of driving power lines, and the cathode power line, respectively, may be disposed at the bent portion BP and the second portion P2 of the first substrate 110 where an image is not displayed. And a plurality of pads electrically connected to the plurality of connection lines may be disposed at the second portion P2 of the first substrate 110.
The plurality of pads and the bent portion BP may define a region between the display portion EP of the first substrate 110 and the plurality of pads, but are not limited thereto.
In more detail, a plurality of extension lines extending from each of the plurality of connection lines and electrically connected to the plurality of pads are formed at the bent portion BP.
Although not shown in fig. 1a, a light blocking member may be disposed on the upper surface of the first portion P1 of the first substrate 110. The light blocking member serves to block light emitted from the display portion EP from traveling toward an upper portion of the first substrate 110. Such a light shielding member may be constituted by a black tape or a coating layer constituted by a photoresist substance.
The second substrate 120 is made of a transparent plastic material and is formed to have a relatively small area compared to the first substrate 110. Such a second substrate 120 is bonded to the first portion P1 of the remaining first substrate 110 except the bent portion BP and the second portion P2 of the first substrate 110 by an adhesive layer 130 formed on the entire surface of the first substrate 110. The adhesive layer 130 is disposed between the first substrate 110 and the second substrate 120, and serves to surface-bond the first substrate 110 and the second substrate 120. As the Adhesive layer 130, various materials can be used, and for example, an Adhesive material such as OCA (Optical Clear Adhesive) and OCR (Optical Clear Resin) can be used.
The second substrate 120 is disposed opposite to the first substrate 110 to support various structural elements of the display device 100. As shown in fig. 1a, the second substrate 120 is disposed to correspond to the first portion P1 of the first substrate 110. The size of the second substrate 120 may be the same as that of the first substrate 110 except for the bent portion BP and the second portion P2. The second substrate 120 may be made of a substance having flexibility, and may be made of the same substance as the first substrate 110.
An optical film for polarization and/or an optical film capable of preventing reflection of external light may be attached or omitted to the lower surface of the second substrate 120.
In addition, a light blocking member for blocking light emitted from the display portion EP from traveling toward a lower portion of the first substrate 110 may be attached to the rear surface of the first substrate 110. Such a light shielding member may be constituted by a black tape or a coating layer constituted by a photoresist substance. Although not shown in fig. 1a, touch sensing elements, touch lines, and pads may be disposed on an inner surface of the second substrate 120.
The touch sensing element serves to recognize a user's touch. The touch sensitive element can be driven by a Resistive type (Resistive type), a Capacitive type (Capacitive type), an electromagnetic type (Electro Magnetic type), or the like. The touch sensing element may include a plurality of touch driving electrodes Tx and a plurality of touch sensing electrodes Rx. The touch sensing element may be electrically connected to the pad of the second substrate 120, the pad of the first substrate 110, and the panel driving part 150 through a touch line.
The dam 14 is disposed on the first portion P1 of the first substrate 110 and at the edge of the first portion P1 of the first substrate 110. Alternatively, the conformal object 140 may be disposed between the first portion P1 and the bent portion BP of the first substrate 110. The dam 140 constantly maintains the radius of curvature of the curved portion BP of the first substrate 110. The adhesive layers 130 may be disposed on the upper and lower surfaces of the bank 140 so that the bank 140 can be adhered to the first portion P1 of the first substrate 110 and the second portion P2 of the first substrate 110. The shape retaining member 140 may be made of SUS (Stainless steel), PET (polyethylene terephthalate), and PC (polycarbonate), but is not limited thereto. The sides of the retaining object 140 may be chamfered.
Next, the panel driving unit 150 will be described below.
The panel driving unit 150 is connected to the first substrate 110, specifically, to the second portion P2 of the first substrate 110.
Although not shown in the drawings, the panel driving portion 150 may be configured by a driving circuit film, a driving circuit board, a driving integrated circuit, and the like, and may be configured by a driving region in which a driving element or a circuit is formed, and a dummy region extending from the driving region.
At this time, the driving circuit Film is coupled to a plurality of pads provided in one side region of the display panel, and the driving circuit Film may be a Chip On Film (COF).
Further, a driving integrated circuit that generates a data signal and a gate signal for causing a pixel of the display panel to emit light and supplies the data signal and the gate signal to the data line and the gate line is mounted on the driving circuit film.
In addition to the COF described above, the driver circuit film may be an FPC (Flexible printed circuit), and may include a driver element for supplying image data and a timing synchronization signal input from the control panel to the driver integrated circuit and a protection cap (protection cap) for covering the driver element.
The driving circuit film may be a flexible printed circuit board (flexible printed circuit board), and may be made of a flexible material, such as a plastic material, such as PI (Polyimide).
In addition, the protective cover can protect the driving elements by covering the driving elements mounted on the driving circuit film, and can also prevent the electrical connection between the driving elements while supporting the display panel.
In addition, one side of the driving circuit thin film is electrically connected to the plurality of pads of the first substrate 110, and the other side is electrically connected to the driving circuit board through the plurality of pads of the driving circuit thin film.
In addition, the driving integrated circuit is mounted on the driving circuit film by a die bonding process or a surface mounting process, and is soldered to the plurality of signal supply terminals and the plurality of signal input terminals.
In more detail, the driving integrated circuit generates a data signal and a gate signal from video data and a timing synchronization signal supplied from the outside through a plurality of signal input terminals, supplies the generated data signal and gate signal to corresponding signal supply terminals, and drives each pixel formed on the display portion EP of the first substrate 110, thereby displaying an image corresponding to the video data on the display portion EP.
Since the panel driving unit 150 is mounted with the driving element on the driving circuit film, the driving circuit film may be formed only by the driving circuit film, and the driving circuit film may be formed together with the driving element into a driving Package (Package) such as a Chip On Film (COF). However, the present invention is not limited to this, and other configurations may be used.
Fig. 1b is a sectional view for explaining a bent state of the display device in fig. 1 a.
Referring to fig. 1b, the first substrate 110 is bent such that the second portion P2 of the first substrate 110 is disposed at an upper portion of the first portion P1 of the first substrate 110, and the dam 140 is disposed between the first portion P1 of the first substrate 110 and the second portion P2 of the first substrate 110. In addition, the first portion P1 and the second portion P2 may be configured to wrap the retainer 840. The second portion P2 of the first substrate 110 is opposite to at least a portion of the first portion P1. The panel driving part 150 attached on the second portion P2 of the first substrate 110 is also opposite to the first portion P1 of the first substrate 110. In addition, the bent portion BP of the first substrate 110 is bent to correspond to the side shape of the shape-maintaining object 140.
The bent portion BP of the first substrate 110 is bent toward the upper surface of the first substrate 110 by a bending apparatus 200, 400, 600, which will be described later, and has a predetermined radius of curvature.
In addition, a residual stress deformation (strain deformation) may be left on the bent portion BP bent by the bending apparatuses 200, 400, and 600.
In addition, the bent shape (i.e., the curved shape) of the curved portion BP may have various forms according to the shape of the shape-maintaining object 140 adhered to one side (i.e., the upper surface) of the first substrate 110.
That is, the form-work 140 designed by the inventor has a curved surface on one side, so that the Guide (Guide) bent portion BP is bent in a manner to have a curved surface.
Further, an adhesive member such as a glue film or a glue solution may be formed on a surface of the protective object 140 opposite to the first substrate 110, and the protective object 140 may be attached on one side (i.e., an upper surface) of the first substrate 110 through the adhesive member.
That is, the bent portion BP may be attached along the surface of the form 140 while being bent by a bending means 200, 400, 600, which will be described later.
Here, in order to minimize the bezel width (bezel width) of the display device 100, it is preferable that the bent portion BP is maximally adjacent to the outer periphery of the second substrate 120.
The dummy region constituting the panel driving unit 150 is a region that is in contact with an external device, and more specifically, the dummy region can be pulled by the external device or an external device. The external instrument is, for example, a clamp portion 221 of a bending apparatus 200 according to an embodiment of the present invention described later.
As shown in fig. 2, the bending apparatus 200 includes a base stage (base stage)210, a gantry (gantry)220, and a bending portion 230. Fig. 2 is a perspective view of a bending apparatus 200 capable of bending or bending, i.e., bending (bending), the display apparatus 100 described above.
That is, the base 210 includes a mounting surface 211, the mounting surface 211 is used to dispose the display device 100 including the bent portion BP, and the base 210 is movable in a predetermined direction in which a bent portion 230 described later is located.
On the contrary, when the base 210 is not moved, the bending part 230 may move in a predetermined direction in which the base 210 is located.
Further, the base stage 210 may include a fixing means for fixing the display device 100 placed on the mounting surface 211.
In more detail, the fixing means may be configured in a groove portion corresponding to the shape of the display device, that is, a stepped portion shape recessed on the mounting surface 211.
Further, as shown in fig. 2, the fixing means may be a suction type fixing means including at least one suction hole 211h formed on the mounting surface 211 of the base 210 and an inhaler for inhaling air from the suction hole 211 h.
At this time, the inhaler may be additionally provided inside the base stage 210 or outside the bending apparatus 200.
When the inhaler is disposed outside the bending apparatus 200, it may be connected to the inhalation hole 211h of the base stage 210 through a tube such as a pipe (pipe) or a hose (hose).
Further, all of the step portion corresponding to the shape of the display device 100, the air intake hole 211h, and the inhaler may be applied, and the step portion may be formed on the mounting surface 211, the air intake hole 211h may be formed in the step portion, and then the inhaler that sucks air through the air intake hole 211h may be connected.
As another example, the fixing device may fix the position of the display device by an electrostatic manner. For this purpose, the fixing means may be electrodes disposed on the mounting surface 211.
That is, the electrode may fix the position of the display device 100 by an electrostatic force when power is supplied, and release the fixing action of the display device 100 when power supply is terminated.
Thus, the display device 100 can be stably disposed on the base 210 by the fixing device of various modes that can be configured according to the embodiment of the present invention.
Referring back to fig. 2, the stage 220 includes a clamp portion 221 for clamping the curved portion BP of the display device 100 and moves toward the curved portion BP.
In this case, as a stage driving method for moving the stage 220, a cylinder method using a hydraulic cylinder or a pneumatic cylinder, a Ball Screw method using a Motor, a Ball Screw (Ball Screw), or the like, a Gear method using a Motor, a rack (rack Gear), a Pinion (Pinion Gear), or the like, a belt method using a Motor, a pulley, a belt, or the like, a Linear Motor (Linear Motor) using a coil, a permanent magnet, or the like can be used.
In addition, the stage 220 may move above the display device 100 disposed on the base stage 210 while reciprocating along a rail 250 that may be formed at a peripheral region of the base stage 210.
Further, the clamp part 221 may include a plurality of clamps, which are composed of a first clamp 221a and a second clamp 221b in an embodiment of the present invention, and the second clamp 221b is combined with the stage 220 and can move in a direction perpendicular to the first clamp 221 a.
That is, in order to drive the second clamp 221b, the same or similar manner as the driving manner of the stage 220 described previously may be used.
In more detail, when the stage 220 moves to the bending portion BP of the display device, the bending portion BP is located at the first clamp 221a side, and the first clamp 221a supports the bending portion BP.
After that, when the second clamp 221b moves toward the first clamp 221a, the clamp portion 221 clamps the bent portion BP.
At this time, in order to adjust the pressure of the clamp portion 220 clamping the bent portion BP, the bending apparatus 200 may include an additional control system having a set pressure inputted by a user.
When the stage 220 moves in the opposite direction by a distance preset by the user according to the specification (spec) of the display device 100, that is, the length of the bent portion BP or the size of the display panel, the clamp portion 221 that clamps the bent portion BP of the display panel fixed to the mounting surface 211 naturally pulls the bent portion BP tightly.
Thereby, the protection object (P) and the bent portion BP are naturally combined in a seamless manner while forming a predetermined curvature on the bent portion BP.
In addition, the bent portion BP of the display device may be bent by tightly pulling the bent portion BP by the clamp portion 221, so that the width of the bezel (bezel) is minimized.
In addition, as a method different from this, when the base 210 on which the display device 100 is disposed is further moved in the direction of the bent portion 230 by a predetermined distance, the clamp portion 221 that clamps the dummy region of the panel driving portion 150, which is a part of the display device 100 connected to the bent portion BP, naturally tightly pulls the bent portion BP.
When the first and second clamps 221a and 221b are made of a metal material such as SUS (Steel Use Stainless Steel) or the tips thereof are formed to be sharp, pad members made of an elastic or stretchable rubber or the like may be coupled to the clamps 221a and 221b contacting the bent portion BP in order to prevent the bent portion BP or the dummy region from being damaged.
The bending part 230 of the embodiment of the present invention is used to bend or bend the bending portion BP of the display device 100, and includes a protrusion 231 and a protrusion moving device 232.
Referring to fig. 2 and the enlarged view of fig. 3a, the protrusion 231 is formed to face the direction of the stage 220, that is, the direction in which the bent portion BP of the display device 100 is located, and can bend and press the bent portion BP.
Further, the protrusion moving device 232 is used to move the protrusion 231 in a direction perpendicular or horizontal to the curved portion BP of the display device 100 disposed on the mounting surface 211, and the driving manner may be the same as or similar to the driving manner of the stage 220 and the second clamp 221b described above.
Next, the protruding portion 231 constituting the bending portion 230 of the embodiment of the present invention will be described in detail.
The protrusion 231 may be composed of a supporting surface 231r for supporting and bending the bent portion BP of the display device 100 and a pressing surface 231p for applying pressure to the bent portion BP.
In more detail, the supporting surface 231r may be formed in a shape having a curvature, for supporting the curved portion BP of the display device 100 moving while being supported on the base 210, and bending the curved portion BP in an opposite direction.
That is, when the base 210 is moved in the direction of the bending portion 230 in a state where the display device 100 is disposed on the mounting surface of the base 210, the bending portion BP of the display device 100 naturally comes into contact with the support surface 231r of the protruding portion 231.
Thereafter, when the base 210 is gradually moved further toward the bending portion 230, the bent portion BP of the display device 100 is pushed by the protruding portion 231 in the direction opposite to the direction in which the base 210 is moved, and is bent downward of the pressing surface 231 p.
Further, the pressing surface 231p applies heat or pressure to the bent portion BP to bend the bent portion BP of the display device 100.
At this time, stress deformation (strain) remains in the bent portion BP heated or pressed by the pressing surface 231 p.
Further, a pad member 233 made of a material such as rubber having elasticity or elasticity may be bonded to the pressing surface 231p for applying heat or pressure to the bent portion BP, and the pad member 233 can prevent the bent portion BP from being damaged which may occur when the protrusion 231 made of a metal material directly presses the bent portion BP.
In addition, in order to adjust the pressure of the bending part 230 bending the bending part BP, the bending apparatus 200 may have an additional control system having a preset pressure inputted by a user.
In summary, the protrusion 231 functions as a push rod (Pushing Bar) that bends the bending portion BP of the display device 100.
On the other hand, when the base 210 is not moved, the curved portion 230 can move in the direction of the curved portion BP of the display device 100, and therefore the support surface 231r of the protruding portion 231 can support and curve the curved portion BP.
Further, in order to accurately arrange the display device 100 on the mounting surface 211 of the base 210, the bending device 200 of the embodiment of the present invention may include a position checking portion 240 that may be constituted by a camera.
That is, the position checking unit 240 may transmit an image of the process of disposing the display device 100 on the mounting surface 211 and the disposition state of the display device 100 on the mounting surface 211 to the operator through the display, so that the operator may control the accurate disposition of the display device 100 on the mounting surface 211 through the position checking unit 240.
Fig. 3a to 3e are perspective views illustrating a driving procedure of the bending apparatus according to an embodiment of the present invention, and a process of bending the display apparatus 100 by the bending apparatus 200 will be described with reference to fig. 3a to 3 e.
First, as shown in fig. 3a, the display device 100 is disposed on the mounting surface 211 of the base 210 by a transfer tool such as a robot arm (robot arm), so that the curved portion BP of the display device 100 and a portion of the display device 100 connected to the curved portion BP are directed toward the curved portion 230.
At this time, the operator checks whether or not the display device 100 is accurately arranged on the mounting surface 211 by the position checking unit 240 described above, and adjusts the display device 100 when an abnormality occurs in the arrangement thereof.
After the display device 100 is accurately mounted on the mounting surface 211, the display device 100 is fixed to the base 210 by the fixing device 211 such as the suction type fixing device formed on the base 210 as described above.
Thereafter, the base 210 is gradually moved toward the bending portion 230, and at this time, the bending portion BP of the display device 100 comes into contact with the support surface 231r of the protruding portion 231. At this time, the support surface 231r of the protrusion 231 is configured to have a shape having a curvature, and contacts the curved portion BP to curve the curved portion BP.
In addition, in a state where the base 210 is not moved, after the bending portion 230 is gradually moved toward the display device 100, the bending portion BP and the supporting surface 231r of the protruding portion 231 are contacted with each other.
Thereafter, as shown in fig. 3b, when the stage 220 moves in the direction of the bending portion 230 in a state where the clamp portions 221 are opened, the first clamp 221a prepares a dummy region of the panel driving portion 150, which is a partial region supporting the bending portion BP or supporting the display device 100 connected to the bending portion BP.
Thereafter, as shown in fig. 3c, the base 210 is further moved toward the protruding portion 231, or the bending portion 230 is further moved toward the base 210, so that the bending portion BP is bent toward the stage 220 by the protruding portion 231.
Thus, a dummy region, which is a partial region of the display device 100 connected to the bent portion BP, is located between the first clamp 221a and the second clamp 221 b.
Thereafter, as shown in fig. 3d, when the clamp portion 221 clamps the dummy region, which is a partial region of the display device 100 connected to the bent portion BP, the stage 220 is finely moved in the opposite direction, whereby the space between the bank (P) and the bent portion BP becomes tight, and thus the bent portion BP and the shape-maintaining object P are closely coupled.
Further, when the clamp portion 221 clamps the dummy region, the base 210 can be moved slightly in the direction of the bending portion 230, so that the bending portion BP is tightly coupled to the shape-retaining material P.
Thereafter, as shown in fig. 3e, the bent portion 230 is moved in a downward direction toward the display device 100, and the pressing surface 231p of the protrusion 231 presses the bent portion BP of the display device 100.
At this time, stress deformation (deformation) may remain in the bent portion BP that receives pressure or heat through the pressing surface 231 p.
As described above, with the bending apparatus 200 including the bending part 230 according to the embodiment of the present invention, the bending part BP of the display apparatus 100 can be smoothly bent without damaging the display apparatus 100.
Fig. 4 is a perspective view showing a bending apparatus according to another embodiment of the present invention.
The bending apparatus 400 of fig. 4 and the bending apparatuses 600 and 900 of fig. 6 and 9 described below can bend the first substrates 110 and 810. Here, the bending operation of the first substrate 110, 810 may be performed by a primary bending and a secondary bending. The curvature radius of the curved portion BP of the substrate 110, 810 passing through the primary bending is larger than the curvature radius of the curved portion BP of the first substrate 110, 810 passing through the secondary bending. The secondary bending of the substrate 110, 810 may be performed in a state where the stage 420, 620, 920 clamps the first substrate 110, 810 or the panel driving part 150, 650.
The respective constituent elements of the bending apparatus of fig. 4 perform substantially the same functions as those of the respective constituent elements of the bending apparatus of fig. 2. The bending apparatus of fig. 4 is substantially the same as the bending apparatus of fig. 2 in the configuration except that the base 410, the stage 420, the bending portion 430, the position inspecting portion 440, the first rail 450, and the motor 460 are different in shape and configuration, and the second rail 452 is also disposed on the base 410, and thus, a repetitive description thereof will be omitted.
Referring to fig. 4, the bending apparatus 400 includes a base 410, a stage 420, a bending portion 430, a position checking portion 440, a first rail 450, a second rail 452, and a motor 460.
The base 410 includes a mounting surface 412 for mounting the display device 100 and a suction hole 414 for fixing the display device 100. The base 410 is configured to be movable in the first axis direction, for example, in the X axis direction along the second rail 452. The abutment 410 moves in the first axial direction so as to approach the bent portion 430 or move away from the bent portion 430. The stage 410 is movable in a first axial direction and performs a first bending and a second bending of the first substrate 110.
As shown in fig. 4, the stand 420 is configured in a structure in which two support frames opposite to each other support one structure. The gantry 420 includes a first clamp 422, a second clamp 424, and a clamp assist device 426. The clamp assist device 426 is connected to the first clamp 422 and the second clamp 424, and is capable of moving the first clamp 422 and the second clamp 424 simultaneously in a second axis direction, for example, a Z axis direction, which is perpendicular to the first axis direction, for example, the X axis direction. The stage 420 is configured to be movable in a first axial direction, for example, in an X-axis direction along the first rail 450. Independently of the stage 410 being able to perform the secondary bending, the stage 420 is also able to move in the first axis direction, for example, in the X-axis direction, and perform the secondary bending on the first substrate 110 having completed the primary bending.
As shown in fig. 4, the bent portion 430 is configured in a structure similar to the stage 420. The bent portion 430 includes a contact member 432 and a contact assistance device 434. Unlike the protruding member 232 of fig. 2, the contact member 432 is not protruded toward the stage 420, but is disposed between the contact assistance devices 434 separated from each other. The contact member 432 is configured to be movable in the second axis direction, for example, in the Z axis direction by a motor not shown.
The position checking unit 440 is disposed above the base 410. Unlike the position checking part 440 of fig. 2, the position checking part 440 of fig. 4 is not connected to the stage 420.
The first rail 450 is disposed at a lower portion of the stage 420 and is disposed in a longitudinal direction with a second rail 452 interposed therebetween. The first rail 450 functions to guide the stage 420 so that the stage 420 can move in the first axis direction. As shown in fig. 4, a concave-convex pattern may be formed on the first rail 450 so that the stage 420 can be easily moved. The first rail 450 is not extended to the bent portion 430 but disposed apart from the bent portion 430.
The second rail 452 is disposed in the longitudinal direction below the base 410. The second rail 452 functions to guide the base 410 so that the base 410 can move in the first axis direction, for example, in the X-axis direction. As shown in fig. 4, similarly to the first rail 450, a concave-convex pattern may be formed on the second rail 452, thereby enabling the base 410 to be easily moved. The second rail 452 extends to a portion beyond the bent portion 430, thereby enabling the abutment 410 to move through the fixed bent portion 430.
The motor 460 functions to move the stage 420 in a first axis direction, for example, in an X-axis direction, by the cylinder 462. The motor 460 of fig. 4 may be driven in the same manner as the motor 240 of fig. 2.
In fig. 4, for convenience of illustration, only one motor 460 connected to the stage 420 is illustrated, but the bending apparatus 400 may further include a motor 460 for moving the base 410 in a first axis direction, for example, in an X-axis direction, and a motor for moving the contact member 432 in a second axis direction, for example, in a Z-axis direction. The motor connected to the base 410 and the contact member 432 may be driven in a similar manner to the motor 240 connected to the stage 420.
The bending apparatus 400 according to another embodiment of the present invention uses the second rail 452 when the base 410 is moved, and thus has an advantage in that the bending work of the first substrate 110 can be more easily performed.
Fig. 5a to 5h are views illustrating a pattern of bending the first substrate using the bending apparatus according to another embodiment of the present invention illustrated in fig. 4. In the description of fig. 5a to 5h, the overlapping description described with reference to fig. 3a to 3e will be omitted.
Referring to fig. 5a, the display device 100 is mounted on the mounting surface 412 of the base 410.
Referring to fig. 5b, the display device 100 is mounted on the base 410, and the panel driving part 150 is supported by the contact member 432 located at a higher position than the base 410. The position checking unit 440 photographs a pattern in which the display device 100 is disposed on the mounting surface 412 of the base 410 and sends the image to the operator. The operator can view the image transmitted from the position inspecting part 440 and adjust the position of the display device 100 with reference to, for example, an alignment mark (160) disposed along the side surface of the shape-retaining object 140, thereby accurately disposing the display device 100 at a designated position.
Referring to fig. 5c, the suction holes 414 for fixing the first portion P1 of the first substrate 110 are operated to fix the first portion P1 of the first substrate 110 on the base 410.
Referring to fig. 5d, in a state where the first portion P1 of the first substrate 110 is fixed on the base 410 and the panel driving part 150 is supported by the contact member 432, the base 410 moves in the first axis direction, for example, the X axis direction toward the bending part 430 and primarily bends the first substrate 110. The base 410 is movable in the first axial direction along the second rail 452 by a motor, not shown. As shown in fig. 5d, as a result of the one-time bending, the bent portion BP of the first substrate 110 is bent with a large radius of curvature. After one bending is completed, the bent portion BP of the first substrate 110 cannot be adhered to the shape-maintaining object 140.
Referring to fig. 5e, the stage 420 moves in a first axis direction, for example, in an X axis direction, toward the bending part 430. The stage 420 is moved in the first axial direction by the motor 460 and along the first rail 450. As a result, the panel driving unit 150 is mounted on the first clamp 422.
Referring to fig. 5f, in a state where the first substrate 110 is bent once, the second clamp 424 is vertically lowered, and the first clamp 422 and the second clamp 424 clamp the panel driving part 150.
Referring to fig. 5g, the first portion P1 of the first substrate 110 is fixed on the base 410, and in a state where the panel driving part 150 is clamped by the stage 420, the base 410 moves in the first axis direction, for example, in the X axis direction toward the bending part 430 and secondarily bends the first substrate 110. The base 410 is movable along the second rail 452 in the first axis direction, for example, in the X axis direction by a motor not shown. As shown in fig. 5g, as a result of the secondary bending, the radius of curvature of the bent portion BP of the first substrate 110 becomes smaller than that at the primary bending. After the second bending is completed, the bent portion BP of the first substrate 110 is closely attached to the conformal object 140, and the conformal object 140 is attached to the second portion P2 of the first substrate 110.
Referring to fig. 5h, after the contact member 432 is moved in the second axis direction, for example, in the Z axis direction, the curved portion BP of the first substrate 110 is pressed. Thereby, the dam 140 is firmly attached to the first substrate 110. The contact member 432 is movable by a motor not shown.
Fig. 6 is a perspective view showing a bending apparatus according to another embodiment of the present invention.
The bending apparatus 600 of fig. 6 is substantially the same as the bending apparatus 400 of fig. 4 except that the base 410 is not connected to the rail but is fixed, the bending portion 630 is movable in the first axis direction, for example, in the X axis direction, and the portion of the rail 650 corresponding to the first rail 450 of fig. 4 that extends beyond the bending portion 630 is different, and therefore, the repeated description thereof is omitted.
The bending portion 630 includes a contact member 632 and a contact assistant 634. The bent portion 630 may be configured to be movable in a first axial direction, for example, in an X-axis direction. The bending portion 630 moves in the first axis direction, for example, in the X axis direction, so as to approach the base 410 or move away from the base 410. The bent portion 630 functions as a guide for the stage 420 and is movable in a first axial direction, for example, in an X-axis direction, along a rail 650 extending to a lower portion of the bent portion 630. The bending portion 630 is movable in a first axis direction, for example, in an X axis direction by a motor not shown. Such a motor may be driven in the same manner as the motor 460 connected to the stage 420. The bending part 630 may move in a first axis direction, for example, in an X axis direction, and perform one bending of the first substrate 110.
The rail 650 is disposed below the stage 420 and the bending portion 630, and is disposed in the longitudinal direction through the base 410. The rail 650 extends to a portion beyond the stage 420 and beyond the bend 630. The rail 650 serves to guide the stage 420 and the bending part 630 so that the stage 420 and the bending part 630 can move in the first axis direction.
As shown in fig. 6, the abutment 410 is not connected to an additional rail, but is fixed. Accordingly, in the bending apparatuses 200 and 400 of fig. 2 and 4, the base 410 performs the primary bending of the first substrate 110, but in the bending apparatus 400 of fig. 6, the bending portion 630 performs the primary bending of the first substrate 110.
The bending apparatus 600 according to another embodiment of the present invention does not need a rail for guiding the base 410 since the bending part 630 is moved along the rail 650 of the guide stage 420. Therefore, the structure of the bending apparatus 600 can be further simplified.
Fig. 7a to 7h are perspective views showing a driving sequence of a bending apparatus according to another embodiment of the present invention illustrated in fig. 6. In the description of fig. 7a to 7h, the overlapping description described in fig. 3a to 3e and fig. 5a to 5h is omitted.
Referring to fig. 7a, the display device 110 is mounted on the mounting surface 412 of the base 410.
Referring to fig. 7b, the display device 110 is mounted on the base 410, and the panel driving unit 150 is supported by the contact member 632. The position inspecting unit 440 photographs a pattern in which the first substrate 110 is disposed on the mounting surface 412 of the base 410 and transfers the photographed pattern to an operator.
Referring to fig. 7c, the suction holes 414 for fixing the first portion P1 of the first substrate 110 are operated to fix the first portion P1 of the first substrate 110 on the base 410.
Referring to fig. 7d, in a state where the first portion P1 of the first substrate 110 is fixed to the base 410, the base 410 is similarly fixed so as not to be movable, and the panel driving portion 150 is supported by the contact member 632, the bending portion 630 moves in the first axis direction, for example, the X axis direction toward the stage 420, and primarily bends the first substrate 110. Such a primary bending process is performed by pushing (pushing) the panel driving part 150 by the contact member 632 in a state where the first portion P1 of the first substrate 110 is fixed. The flexure 630 may move along the track 650 in a first axial direction, for example, in an X-axis direction.
Referring to fig. 7e, the stage 420 moves in a first axis direction, for example, in an X axis direction, toward the bending part 630. The stage 420 is moved in a first axial direction, e.g., in an X-axis direction, by a motor 460 and along a rail 650.
Referring to fig. 7f, in a state where the first substrate 110 is bent once, the second clamp 424 is vertically lowered, and the second clamp 424 and the first clamp 422 clamp the panel driving part 150.
Referring to fig. 7g, in a state where the first portion P1 of the first substrate 110 is fixed on the base 410, the base 410 is similarly fixed immovably, and the panel driving part 150 is clamped by the stage 420, the stage 420 moves in the first axis direction, for example, the X axis direction, away from the bending part 630, and secondarily bends the first substrate 110 that has been primarily bent.
Referring to fig. 7h, the contact member 632 moves in a second axis direction, for example, in a Z axis direction, and pressurizes the bent portion BP of the first substrate 110.
Fig. 8a is a sectional view for explaining a display device that can be bent using a bending apparatus according to another embodiment of the present invention.
Fig. 8a shows the display device 800 before bending. The display device 800 of fig. 8a is substantially the same as the display device 100 of fig. 1a only in that the structure of the portion of the second substrate 820 extending beyond the bent portion BP of the first substrate 810 and the structure including the first and second panel driving portions 850 and 852 are different from each other, and thus redundant description is omitted.
Referring to fig. 8a, the display device 800 includes a first substrate 810, a second substrate 820, an adhesive layer 830, a dam 840, a first panel driver 850, and a second panel driver 852.
The first substrate 810 is a substrate for supporting various structural elements of the display device 800. As shown in fig. 8a, the first substrate 810 includes a first portion P1, a bent portion BP extending from the first portion P1, and a second portion P2 extending from the bent portion BP. The first portion P1 of the first substrate 810 includes a display portion EP displaying an image and a non-display portion NEP not displaying an image. An organic light emitting element may be disposed on an inner surface of the display portion EP of the first substrate 810.
The second substrate 820 is disposed to face the first substrate 810 so as to support various structural elements of the display device 800. As shown in fig. 8a, the second substrate 820 extends to a portion beyond the bent portion BP of the first substrate 810. A touch sensing element may be disposed on an inner surface of the second substrate 820.
The adhesive layer 830 is disposed between the first substrate 810 and the second substrate 820, and functions to adhere the surfaces of the first substrate 810 and the second substrate 820.
The dam 840 is disposed on the first portion P1 of the first substrate 810 and at the edge of the first portion P1 of the first substrate 810. Alternatively, the conformal object 140 may be disposed between the first portion P1 and the bent portion BP of the first substrate 110.
The first panel driving unit 850 is connected to the first substrate 810, specifically, to the second portion P2 of the first substrate 810. The first panel driving unit 850 is connected to the organic light emitting device disposed on the first substrate 810, and functions to transmit various signals for light emission of the organic light emitting device. The first panel driving part 850 may preferably be a flexible printed circuit board.
A second panel driving part 852 is connected to the second substrate 820, specifically, to a portion of the second substrate 820 facing the second portion P2 of the first substrate 810. The second panel driver 852 functions to receive signals transferred from the touch sensing elements. The second panel driver 852 may also preferably be a flexible printed circuit board. The second panel driving part 852 may be composed of the same substance as the first panel driving part 850.
Fig. 8b is a sectional view for explaining a bent state of the display device of fig. 8 a.
Referring to fig. 8b, the first substrate 810 is bent, and the second portion P2 of the first substrate 810 is disposed above the first portion P1 of the first substrate 810, and a dam 840 is disposed between the first portion P1 of the first substrate 810 and the second portion P2 of the first substrate 810. Also, the first portion P1 and the second portion P2 may be configured to cover the retainer 840. The first panel driving part 850 attached on the second portion P2 of the first substrate 810 is also opposite to the first portion P1 of the first substrate 810. And, the second substrate 820 extends to a portion beyond the bent portion BP of the first substrate 810 in a state of not being bent.
Fig. 9 is a perspective view showing a bending apparatus according to another embodiment of the present invention for bending the display apparatus illustrated in fig. 8a and 8 b.
The bending apparatus 900 of fig. 9 differs from the bending apparatus 400 of fig. 4 only in the specific configuration of the bending portion 930, and the remaining configuration is substantially the same, and therefore, redundant description is omitted.
Referring to fig. 9, the bent portion 930 includes a contact member 932 and an auxiliary rail 934.
The contact member 932 protrudes toward the stage 420 and is disposed at a position higher than the base 410. As shown in fig. 9, the contact member 932 is disposed on one of the two supports of the curved portion 930. The Y-axis direction length of the contact member 932 is longer than the Y-axis direction lengths of the first and second panel drivers 850, 852.
The contact member 932 is configured to be movable in a second axis direction, for example, in a Z axis direction. The auxiliary rail 934 connected with the contact member 932 is movable in the second axis direction, for example, in the Z-axis direction, along a plurality of grooves 936 formed at the bent portion 930, and the contact member 932 is likewise movable in the second axis direction, for example, in the Z-axis direction. The contact member 932 is movable in the second axis direction, for example, in the Z axis direction by a motor not shown. Such a motor may be driven in the same manner as the motor 460 connected to the stage 420.
The contact member 932 is configured to be movable not only in the second axis direction, for example, in the Z axis direction, but also in the first axis direction, for example, in the X axis direction, and in a third axis direction, for example, in the Y axis direction, which is perpendicular to the second axis direction, for example, in the Z axis direction. The contact member 932 is movable in a third axis direction, e.g., a Y axis direction, along an auxiliary rail 934 disposed below the contact member 932. The contact member 932 is movable in a third axis direction, for example, a Y axis direction by a motor not shown. Such a motor may also be driven in the same manner as the motor 460 connected to the stage 420.
Similarly to the contact member 432 shown in fig. 4, the contact member 932 shown in fig. 6 may be in contact with at least one of the second portion P2 of the first substrate 810 and the first panel driving unit 850 shown in fig. 8a, and may press the bent portion BP of the first substrate 810 in a state where the first substrate 810 is bent. Further, since the contact member 932 shown in fig. 9 is configured to be movable not only in the second axis direction but also in the third axis direction, the first panel driving part 850 and the second panel driving part 852 of fig. 8a can be separated. Specifically, the contact member 932 is movable in the third axis direction, for example, in the Y axis direction, and then disposed between the first and second panel driving portions 850 and 852 which are in close contact with each other, and in this state, is movable in the second axis direction, for example, in the Z axis direction, thereby separating the first and second panel driving portions 850 and 852.
In order to prevent damage to the lower surface of the first panel driving unit 850 when separating the first panel driving unit 850 and the second panel driving unit 852 of fig. 8a, a pad member having elasticity or stretchability may be disposed on the upper surface of the contact member 932, as well as the pressing surface, i.e., the lower surface, of the contact member 932 of fig. 9.
The auxiliary rail 934 is disposed on one of the two support legs of the bent portion 930 at a lower portion of the contact member 932. The auxiliary rail 934 serves to guide the contact member 932 so that the contact member 932 can move in the third axis direction, for example, in the Y axis direction. The auxiliary rail 934 may have a concave-convex pattern similar to the concave-convex pattern formed on the first rail 450 and the second rail 452 of fig. 4.
When a display device including a first panel driving unit and a second panel driving unit is operated, the first panel driving unit and the second panel driving unit of the display device frequently adhere to each other because the interval between the first substrate and the second substrate is very narrow. In the past, since an operator manually separates the first panel driving unit and the second panel driving unit attached to the first substrate, the first panel driving unit and the second panel driving unit are easily damaged, and the time required for the bending operation of the first substrate is increased.
In the bending apparatus 900 according to another embodiment of the present invention, the contact member 932 directly involved in the bending operation of the first substrate 810 separates the first panel driving unit 850 and the second panel driving unit 852 by a force accurately controlled. Accordingly, damage to the first and second panel driving parts 850 and 852 due to the separating work can be minimized, and the time required for the bending work of the first substrate 810 can be shortened to improve the production efficiency. Fig. 10a to 10j are perspective views illustrating a driving sequence of a bending apparatus according to another embodiment of the present invention for bending the display apparatus illustrated in fig. 9. In the description of fig. 10a to 10j, the overlapping description described with reference to fig. 5a to 5h and fig. 7a to 7h will be omitted.
Referring to fig. 10a, the display device 800 is mounted on the mounting surface 412 of the base 410. A first panel driving unit 850 is attached to the first substrate 810, and a second panel driving unit 852 is attached to the second substrate 820.
Referring to fig. 10b, although the display device 800 is mounted, the first panel driving part 850 is not supported by the contact member 932. The position inspecting unit 440 photographs a pattern in which the first substrate 810 is arranged on the mounting surface 412 of the base 410, and conveys the pattern to the worker. The worker can view the image transmitted from the position inspecting part 440 and adjust the position of the display device 800 with reference to, for example, an alignment mark (860), thereby accurately disposing the display device 800 at a predetermined position.
Referring to fig. 10c, the suction holes 414 for fixing the first portion P1 of the first substrate 810 are operated, and the first portion P1 of the first substrate 810 is fixed on the base 410.
Referring to fig. 10d, the contact member 932 is moved in the third axis direction, for example, in the Y axis direction, and then is disposed between the first and second panel driving portions 850 and 852, which are in close contact with each other. The contact member 932 is movable along the auxiliary rail 934 in a third axis direction, for example, in the Y axis direction, by a motor not shown.
Referring to fig. 10e, the contact member 932 is moved in the second axis direction, for example, in the Z axis direction, while being disposed between the first and second panel driving portions 850 and 852, thereby separating the first and second panel driving portions 850 and 852. The auxiliary rail 934 coupled to the contact member 932 is moved in a second axis direction, e.g., in a Z-axis direction, along a groove 936 formed at the bent portion 930, thereby enabling the contact member 932 to move in the second axis direction, e.g., in the Z-axis direction.
Referring to fig. 10f, in a state where the first portion P1 of the first substrate 810 is mounted on the base 410 and the first panel driving part 850 is supported by the contact member 932, the base 410 moves in the first axis direction, for example, the X axis direction toward the bending part 930 and primarily bends the first substrate 810. The base 410 can be moved in the first axis direction, for example, in the X axis direction along the second rail 452 by a motor not shown.
Referring to fig. 10g, the stage 420 moves in a first axis direction, for example, in an X axis direction, toward the bending part 930. The stage 420 is moved in a first axis direction, for example, in an X-axis direction, by a motor and along the second rail 450.
Referring to fig. 10h, in a state where the first substrate 810 is bent once, the second clamp 424 is vertically lowered, and the first clamp 422 and the second clamp 424 clamp the first panel driving part 850.
Referring to fig. 10i, in a state where the first portion P1 of the first substrate 810 is fixed on the base 410 and the first panel driving part 850 is clamped by the stage 420, the base 410 moves in the first axis direction, for example, the X axis direction toward the bending part 930 and secondarily bends the first substrate 810. The base 410 can be moved in the first axis direction, for example, in the X axis direction along the second rail 452 by a motor not shown. As shown in fig. 10i, the base 410 may pass between two supporting frames of the bending part 930 in order to bend the first substrate 810 for the second time.
Referring to fig. 10j, the contact member 932 moves in a second axis direction, for example, in a Z-axis direction, and pressurizes the curved portion BP of the first substrate 810.
The embodiments of the present invention have been described in further detail with reference to the drawings, but the present invention is not limited to these embodiments and can be modified in various ways without departing from the scope of the inventive concept. Therefore, the embodiments disclosed in the present invention are not provided to limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. It is therefore to be understood that the above described embodiments are illustrative in all respects, and not restrictive. The scope of the invention should be construed by claims, and all technical ideas within the scope of equivalents thereof should be construed to be included in the scope of the claims.
Claims (17)
1. A bending apparatus comprising:
a base including a mounting surface for configuring a display device;
a stage for clamping a portion of the display device connected to a curved portion of the display device and moving in a direction opposite to a direction in which the curved portion extends from the display device to form a curvature on the curved portion; and
a bending part for bending and pressing the bending part,
the base and the bending portion are configured to be movable with respect to each other.
2. The bending apparatus according to claim 1,
the bending part includes:
a protrusion protruding toward the stage for bending and pressurizing the bent portion; and
a protrusion moving device for moving the protrusion to the curved portion of the display device disposed on the mounting surface.
3. The bending apparatus according to claim 2,
the protruding portion includes:
a support surface formed in a shape having a curvature for contacting the curved portion and bending the curved portion; and
a pressing surface for applying a pressing force to the bent portion.
4. The bending apparatus according to claim 3,
the bent portion further includes:
and a pad member coupled to the pressing surface.
5. The bending apparatus according to claim 1,
the bent portion further includes: and a contact member contacting at least one of the first substrate and the at least one panel driving part.
6. The bending apparatus according to claim 5,
the contact member is configured to press the first substrate in a state where the first substrate is bent.
7. The bending apparatus according to claim 5,
the contact member is configured to be movable in a direction perpendicular to a moving direction of the base.
8. The bending apparatus according to claim 7,
when the display device includes a plurality of panel driving parts,
the contact member is configured to move between the plurality of panel driving units and separate the plurality of panel driving units in different directions from each other.
9. The bending apparatus according to claim 6,
the contact member further includes:
a pressing surface for pressing the first substrate and a pad member coupled to the pressing surface.
10. The bending apparatus according to claim 1,
the stage further includes a clamping portion,
forming a curvature on the curved portion by moving the clamping portion that clamps a portion of the display device.
11. The bending apparatus according to claim 10,
the clamp portion includes:
a first clamp for supporting a portion of the display device; and
and a second clamp for moving toward the first clamp and clamping a portion of the display device.
12. The bending apparatus according to claim 11,
the clamping portion further includes:
and a pad member coupled to regions of the first and second jaws that face each other.
13. The bending apparatus according to claim 1,
the base table forms a curvature on the curved portion by moving a portion of the display device sandwiched by the stage in a direction adjacent to the curved portion.
14. The bending apparatus according to claim 1,
the base station includes:
and a fixing device for fixing the display device arranged on the mounting surface.
15. The bending apparatus according to claim 14,
the fixing means is constituted by a groove portion corresponding to the shape of the display device.
16. The bending apparatus according to claim 14,
the fixing device includes:
at least one suction hole formed on the base; and
an inhaler for inhaling air from the inhalation port.
17. The bending apparatus according to claim 1, further comprising:
a position checking section for checking the arrangement of the display device on the mounting surface.
Applications Claiming Priority (3)
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KR10-2014-0036886 | 2014-03-28 | ||
KR20140036886 | 2014-03-28 | ||
CN201510145780.3A CN104952373B (en) | 2014-03-28 | 2015-03-30 | Display device and the bending apparatus for manufacturing the device |
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CN201510145780.3A Division CN104952373B (en) | 2014-03-28 | 2015-03-30 | Display device and the bending apparatus for manufacturing the device |
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CN201520186432.6U Active CN204557963U (en) | 2014-03-28 | 2015-03-30 | Display device and manufacture the bending apparatus of this device |
CN201810217619.6A Active CN108492718B (en) | 2014-03-28 | 2015-03-30 | Display device and bending device for manufacturing the same |
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CN201520186432.6U Active CN204557963U (en) | 2014-03-28 | 2015-03-30 | Display device and manufacture the bending apparatus of this device |
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KR102355043B1 (en) | 2022-01-25 |
CN104952373A (en) | 2015-09-30 |
KR20150114407A (en) | 2015-10-12 |
CN104952373B (en) | 2019-01-01 |
CN204557963U (en) | 2015-08-12 |
CN108492718A (en) | 2018-09-04 |
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