Display device

Abstract

The present invention provides a display device. The display device may include: a display panel including non-foldable regions arranged along a first direction and foldable regions disposed between the non-foldable regions; a first electrode disposed on the display panel and extending along the first direction; and a second electrode disposed on the display panel, insulated from the first electrode, and extending along a second direction intersecting the first direction, wherein an opening overlapping the foldable regions may be defined on the first electrode.

Description

Technical Field

[0001] This invention relates to a display device and its driving method. Background Technology

[0002] Typically, electronic devices that provide images to users, such as smartphones, digital cameras, laptops, navigation devices, and smart TVs, include display devices for displaying images. The display device generates images and provides them to the user through a displayed screen.

[0003] Recently, with the technological advancements in display devices, various forms of display devices are being developed. For example, flexible display devices that can deform into curved shapes, or can be folded or rolled up are being developed. Flexible display devices are easy to carry and can improve user convenience.

[0004] In flexible display devices, the foldable display folds based on a folding axis. Currently, there is a need to develop a technology that makes it easier to fold the folding area of ​​the foldable display device. Summary of the Invention

[0005] The purpose of this invention is to provide a display device and a driving method thereof that include an input sensing unit that can be folded more easily.

[0006] A display device according to an embodiment of the present invention may include: a display panel including non-foldable regions arranged along a first direction and foldable regions disposed between the non-foldable regions; a first electrode disposed on the display panel and extending along the first direction; and a second electrode disposed on the display panel, insulated from the first electrode, and extending along a second direction intersecting the first direction, wherein an opening overlapping the foldable regions may be defined on the first electrode.

[0007] A driving method for a display device according to an embodiment of the present invention may include the following steps: a touch input sensing unit, wherein the input sensing unit is disposed on a display panel including a folded region, and includes a plurality of first electrodes having an opening overlapping the folded region and receiving a first driving voltage, and a plurality of second electrodes insulated from and intersecting the first electrodes; sensing the touch position; when the touch position is the folded region, applying a second driving voltage having a level higher than the first driving voltage to the touched first electrode among the first electrodes; and sensing the touch for the folded region.

[0008] According to an embodiment of the present invention, an opening is defined on the electrode of the input sensing unit that overlaps with the folding area, thereby making the display device easier to fold. Furthermore, when a user touches the electrode with the opening defined in the folding area, a higher driving voltage is applied to the electrode with the opening, thereby improving sensing reliability. Attached Figure Description

[0009] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention.

[0010] Figure 2 The diagram is in Figure 1 The diagram shows the folded state of the display device.

[0011] Figure 3 This is a perspective view of a display device according to an embodiment of the present invention.

[0012] Figure 4 The diagram is in Figure 3 The diagram shows the folded state of the display device.

[0013] Figure 5 It is illustrated exemplarily in Figure 1 The diagram shows a cross-section of the display device.

[0014] Figure 6 It is illustrated exemplarily in Figure 5 The diagram shows a cross-section of the display panel and a diagram of the input sensing unit arranged on the display panel.

[0015] Figure 7 It is illustrated exemplarily in Figure 6 The diagram shows a cross-section of the input sensing unit.

[0016] Figure 8 and Figure 9 This is an exemplary illustration of a cross-section of a display panel according to an embodiment of the present invention and an input sensing unit arranged on the display panel.

[0017] Figure 10 Is Figure 5 The diagram shows a floor plan of the display panel.

[0018] Figure 11 Is Figure 5 The diagram shows a plan view of the input sensing unit.

[0019] Figure 12 This is an example of an arrangement in Figure 6 The diagram shown in the middle depicts a cross-section of any pixel on the display panel and the input sensing element arranged on the pixel.

[0020] Figure 13 Is Figure 11 The image shows an enlarged view of the first region AA1 in the diagram.

[0021] Figure 14 It is arranged in Figure 13 The diagram shows a cross-sectional view of the input sensing section of the bridging pattern.

[0022] Figure 15 It is used to explain in Figure 11 The diagram shows the first operating mode of the input sensing unit.

[0023] Figure 16 and Figure 17 It is used to explain in Figure 11 The diagram shows the second operating mode of the input sensing unit.

[0024] Figure 18 Is Figure 11 An enlarged view of the portion of the first electrode with an opening, as defined in the diagram.

[0025] Figure 19 Is along Figure 18 The cross-sectional view of line I-I' shown in the figure.

[0026] Figure 20 Is along Figure 18 The cross-sectional view of line II-II' shown in the figure.

[0027] Figure 21 The diagram is in Figure 20 The diagram shows the folded state of the input sensing unit.

[0028] Figure 22 The icon is touched. Figure 11 The diagram shows the state of the folded area in the input sensing unit.

[0029] Figure 23 This is a flowchart illustrating a driving method for a display device according to an embodiment of the present invention.

[0030] Figure 24 This is a diagram illustrating the configuration of an input sensing unit according to another embodiment of the present invention.

[0031] Figure 25 This is a diagram illustrating the configuration of the first electrode of the input sensing unit according to another embodiment of the present invention.

[0032] Figure 26 This is a diagram illustrating the configuration of an input sensing unit according to another embodiment of the present invention.

[0033] Figure 27 Is along Figure 26 The cross-sectional view of line Ⅲ-Ⅲ' shown in the figure.

[0034] Figure 28 This is a diagram illustrating the signal of an input sensing unit that receives a first signal according to an embodiment of the present invention.

[0035] Figure 29 The diagram shows the arrangement of... Figure 26 The diagram shows an input device on a portion of the input sensing section.

[0036] Figure 30 Is Figure 29 The enlarged view of the second region AA2 in the diagram.

[0037] Explanation of reference numerals in the attached figures:

[0038] DD: Display device

[0039] DP: Display Panel

[0040] ISP: Input Sensing Unit

[0041] TE1: First electrode

[0042] TE2: Second electrode

[0043] FA: Folded area

[0044] NFA1: First Unfolded Region

[0045] NFA2: Second Unfolded Region

[0046] OP: Opening

[0047] HOP1: First horizontal opening

[0048] HOP2: Second horizontal opening

[0049] VOP1: First vertical opening

[0050] VOP2: Second vertical opening

[0051] PT1: Part 1

[0052] PT2: Part Two Detailed Implementation

[0053] In this specification, when it is mentioned that a certain component (or region, layer, part, etc.) is "above", "connected" or "combined" with another component, it means that it can be directly arranged on or directly connected / combined with another component, or a third component can be arranged between them.

[0054] The same reference numerals refer to the same constituent elements. Furthermore, in the drawings, the thickness, proportions, and dimensions of the constituent elements are exaggerated for the purpose of effective explanation of the technical content.

[0055] "And / or" includes all combinations of more than one that can be defined in relation to the related composition.

[0056] The terms "first," "second," etc., can be used to describe multiple constituent elements, but the constituent elements should not be limited by the terms. The terms are used only to distinguish one constituent element from another. For example, without departing from the scope of the invention, a first constituent element can be named a second constituent element, and similarly, a second constituent element can be named a first constituent element. Singular expressions include plural expressions unless the context explicitly indicates a different meaning.

[0057] Furthermore, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components illustrated in the accompanying drawings. These terms are relative concepts and are explained based on the directions shown in the accompanying drawings.

[0058] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, terms such as those defined in commonly used dictionaries shall be interpreted as having the same meaning as in the context of the relevant art, and may be expressly defined herein unless interpreted as having an ideal or overly formal meaning.

[0059] Terms such as “including” or “having” should be understood as being intended to specify the presence of features, figures, steps, operations, components, accessories or combinations thereof described in the specification, rather than precluding the presence or additional possibility of one or more other features or figures, steps, operations, components, parts or combinations thereof.

[0060] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0061] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention. Figure 2 The diagram is in Figure 1 The diagram shows the folded state of the display device.

[0062] Reference Figure 1According to an embodiment of the present invention, the display device DD may have a rectangular shape having a long side along a first direction DR1 and a short side along a second direction DR2 intersecting the first direction DR1. However, it is not limited to this, and the display device DD may have various shapes such as circles and polygons. The display device DD may be a flexible display device.

[0063] Hereinafter, the direction that substantially intersects the plane defined by the first direction DR1 and the second direction DR2 is defined as the third direction DR3. Furthermore, in this specification, the expression "when viewed from the plane" can be defined as the state observed in the third direction DR3.

[0064] The display device DD may include a folded region FA and multiple non-folded regions NFA1 and NFA2. The non-folded regions NFA1 and NFA2 may include a first non-folded region NFA1 and a second non-folded region NFA2. The folded region FA may be arranged between the first non-folded region NFA1 and the second non-folded region NFA2. The folded region FA, the first non-folded region NFA1, and the second non-folded region NFA2 may be arranged along a first direction DR1.

[0065] For example, a folded region FA and two non-folded regions NFA1 and NFA2 are illustrated; however, the number of folded regions FA and non-folded regions NFA1 and NFA2 is not limited thereto. For instance, the display device DD may include more than two non-folded regions and multiple folded regions arranged between the non-folded regions.

[0066] The upper surface of the display device DD can be defined as the display surface DS, and can have a plane defined by a first direction DR1 and a second direction DR2. The image IM generated by the display device DD can be provided to the user through the display surface DS.

[0067] The display surface DS may include a display area DA and a non-display area NDA surrounding the display area DA. The display area DA may display an image, while the non-display area NDA may not display an image. The non-display area NDA may surround the display area DA and may define the edge of the display device DD printed with a predetermined color.

[0068] The display device DD can sense input applied from outside the display device DD. For example, the display device DD can sense a first input via the input device PEN and a second input via the touch TC.

[0069] The input device PEN can be an active pen that outputs signals. The second input via the touch TC can include various forms of external input such as a part of the user's body, light, heat, or pressure.

[0070] The display device DD and the input device PEN can communicate bidirectionally. The display device DD can provide uplink signals to the input device PEN. For example, the uplink signals may include information such as panel information and protocol version, but are not specifically limited to this.

[0071] The input device PEN can provide downlink signals to the display device DD. The downlink signals may include synchronization signals or status information of the input device PEN. For example, the downlink signals may include the coordinate information of the input device PEN, the battery information of the input device PEN, the tilt information of the input device PEN, and / or various information stored in the input device PEN, but are not particularly limited thereto.

[0072] Reference Figure 2 The display device DD can be a foldable display device DD that can be folded or unfolded. For example, the folding area FA can be bent with reference to a folding axis FX parallel to the second direction DR2, so that the display device DD can be folded. The folding axis FX can be defined as a short axis parallel to the short side of the display device DD.

[0073] When the display device DD is folded, the first non-folding area NFA1 and the second non-folding area NFA2 can face each other, and the display device DD can be in-folded so that the display surface DS is not exposed to the outside.

[0074] Figure 3 This is a perspective view of a display device according to an embodiment of the present invention. Figure 4 The diagram is in Figure 3 The diagram shows the folded state of the display device.

[0075] In addition to the folding operation, Figure 3 The display device DD_1 shown in the diagram can essentially have the same characteristics as in... Figure 1 The display device DD shown in the diagram has the same configuration. Therefore, the following will mainly describe the folding operation of the display device DD_1.

[0076] Reference Figure 3 and Figure 4 The display device DD_1 may include a folded region FA' and multiple non-folded regions NFA1' and NFA2'. The non-folded regions NFA1' and NFA2' may include a first non-folded region NFA1' and a second non-folded region NFA2'. The folded region FA' may be arranged between the first non-folded region NFA1' and the second non-folded region NFA2'. The folded region FA', the first non-folded region NFA1', and the second non-folded region NFA2' may be arranged along a second direction DR2.

[0077] The folding area FA' can be bent with reference to a folding axis FX' parallel to the first direction DR1, thereby allowing the display device DD_1 to be folded. The folding axis FX' can be defined as a major axis parallel to the long side of the display device DD_1. Figure 1 The display device DD shown in the diagram can be folded with its short axis as the reference; conversely, in... Figure 3 The display device DD_1 shown in the diagram can be folded along its long axis. The display device DD_1 can be in-folded so that the display surface DS is not exposed.

[0078] Figure 5 It is illustrated exemplarily in Figure 1 The diagram shows a cross-section of the display device.

[0079] For example, in Figure 5 The figure shows a cross-section of the display device DD as viewed from the first direction DR1.

[0080] Reference Figure 5 The display device DD may include a display panel DP, an input sensing unit ISP, an anti-reflective layer RPL, a window WIN, a panel protective film PPF, and first adhesive layers AL1 to fourth adhesive layers AL4.

[0081] The display panel DP can be a flexible display panel. According to an embodiment of the present invention, the display panel DP can be a light-emitting display panel. For example, the display panel DP can be an organic light-emitting display panel or a quantum dot light-emitting display panel. The light-emitting layer of an organic light-emitting display panel may include organic light-emitting materials. The light-emitting layer of a quantum dot light-emitting display panel may include quantum dots and quantum rods, etc. Hereinafter, the display panel DP will be described using an organic light-emitting display panel.

[0082] The input sensing unit (ISP) can be arranged on the display panel (DP). The input sensing unit (ISP) may include multiple sensor units (not shown) for capacitively sensing external inputs. The configuration of the input sensing unit (ISP) will be described in detail below.

[0083] An anti-reflective layer (RPL) can be defined as an anti-reflective coating. An RPL reduces the reflectivity of external light incident from above the display device (DD) onto the display panel (DP).

[0084] In cases where external light traveling toward the display panel (DP) is reflected by the DP and then presented to an external user, the user may perceive the external light, much like a mirror. To prevent this phenomenon, for example, the anti-reflective layer (RPL) may include multiple color filters (not shown) that display the same colors as the pixels.

[0085] A color filter can filter external light into the same color as the pixel. In this case, the external light may not be perceptible to the user. However, it is not limited to this. In order to reduce the reflectivity of external light, the anti-reflective layer RPL may include a phase retarder and / or a polarizer.

[0086] The window (WIN) can be placed on the anti-reflective layer (RPL). The window (WIN) can protect the display panel (DP), input sensor (ISP), and anti-reflective layer (RPL) from external scratches and impacts.

[0087] A panel protective film (PPF) can be placed below the display panel (DP). The PPF protects the lower part of the display panel (DP). The PPF can comprise flexible plastic materials such as polyethylene terephthalate (PET).

[0088] The first adhesive layer AL1 can be disposed between the display panel DP and the panel protective film PPF. The display panel DP and the panel protective film PPF can be bonded to each other by the first adhesive layer AL1.

[0089] The second adhesive layer AL2 can be disposed between the display panel DP and the input sensing unit ISP. The display panel DP and the input sensing unit ISP can be bonded to each other by means of the second adhesive layer AL2.

[0090] The third adhesive layer AL3 can be disposed between the anti-reflective layer RPL and the input sensing unit ISP. The anti-reflective layer RPL and the input sensing unit ISP can be bonded to each other by means of the third adhesive layer AL3.

[0091] The fourth adhesive layer AL4 can be placed between the window WIN and the anti-reflective layer RPL. The window WIN and the anti-reflective layer RPL can be joined together by the fourth adhesive layer AL4.

[0092] Figure 6 It is illustrated exemplarily in Figure 5 The diagram shows a cross-section of the display panel and a diagram of the input sensing unit arranged on the display panel.

[0093] For example, in Figure 6 The diagram shows a cross-section of the display panel DP as viewed from the first direction DR1.

[0094] Reference Figure 6 The display panel DP may include: a substrate SUB; a circuit element layer DP-CL disposed on the substrate SUB; a display element layer DP-OLED disposed on the circuit element layer DP-CL; and a thin film encapsulation layer TFE disposed on the display element layer DP-OLED.

[0095] The substrate SUB may include a display area DA and a non-display area NDA surrounding the display area DA. The substrate SUB may include a flexible plastic material such as polyimide (PI). The display element layer DP-OLED may be disposed on the display area DA.

[0096] Multiple pixels can be arranged in the DP-CL circuit element layer and the DP-OLED display element layer. Each pixel may include a transistor arranged in the DP-CL circuit element layer and a light-emitting element arranged in the DP-OLED display element layer and connected to the transistor. The composition of the pixel will be described in detail below.

[0097] The thin-film encapsulation layer (TFE) can be disposed on the circuit element layer (DP-CL) in a manner that covers the display element layer (DP-OLED). The TFE can include an inorganic layer and an organic layer between the inorganic layers. The inorganic layer protects the pixels from moisture / oxygen. The organic layer protects the pixels from foreign matter such as dust particles.

[0098] The input sensing unit (ISP) can be disposed on the thin-film encapsulation layer (TFE). The second adhesive layer (AL2) can be disposed between the input sensing unit (ISP) and the thin-film encapsulation layer (TFE). The input sensing unit (ISP) can be attached to the thin-film encapsulation layer (TFE) via the second adhesive layer (AL2).

[0099] Figure 7 It is illustrated exemplarily in Figure 6 The diagram shows a cross-section of the input sensing unit.

[0100] Reference Figure 7 The input sensing unit (ISP) may include a base substrate BS, a first conductive layer TS-CL1, a second conductive layer TS-CL2, a first insulating layer IL1, and a second insulating layer IL2. The base substrate BS may include a flexible plastic material such as polyethylene terephthalate (PET).

[0101] A first conductive layer TS-CL1 can be disposed below the base substrate BS. A first insulating layer IL1 can be disposed below the first conductive layer TS-CL1, and a second conductive layer TS-CL2 can be disposed below the first insulating layer IL1. A second insulating layer IL2 can be disposed below the second conductive layer TS-CL2.

[0102] The first conductive layer TS-CL1 and the second conductive layer TS-CL2 may include conductive materials. The first conductive layer TS-CL1 and the second conductive layer TS-CL2 may include transparent conductive materials such as indium tin oxide (ITO), however, the conductive materials are not limited to this. The first insulating layer IL1 and the second insulating layer IL2 may include organic or inorganic insulating layers.

[0103] Figure 8 and Figure 9 This is an exemplary illustration of a cross-section of a display panel according to an embodiment of the present invention and an input sensing unit arranged on the display panel.

[0104] The following is in accordance with... Figure 6 The diagram shows different compositions, mainly in... Figure 8 and Figure 9 The display panel and input sensing unit shown in the diagram will be explained.

[0105] Reference Figure 8 , and in Figure 6 The structure shown in the diagram differs; the input sensing unit (ISP) can be directly mounted on the display panel (DP). For example, the ISP can be directly mounted on the thin-film encapsulation layer (TFE). When manufacturing the display device (DD), the ISP can be directly fabricated on the display panel (DP).

[0106] Reference Figure 9 An encapsulation substrate EN-SB can be disposed on the DP-OLED display element layer. A sealant SAL can be disposed between the substrate SUB and the encapsulation substrate EN-SB. The sealant SAL can be disposed in the non-display area NDA. The sealant SAL can bond the substrate SUB and the encapsulation substrate EN-SB. The DP-OLED display element layer can be sealed between the substrate SUB and the encapsulation substrate EN-SB by means of the sealant SAL.

[0107] The input sensing unit (ISP) can be directly mounted on the display panel (DP'). For example, the input sensing unit (ISP) can be directly mounted on the package substrate (EN-SB).

[0108] Figure 10 Is Figure 5 The diagram shows a floor plan of the display panel.

[0109] Reference Figure 10 The display device DD may include a display panel DP, a scan driver SDV, a data driver DDV, an emission driver EDV, and a plurality of first pads PD1.

[0110] The display panel DP may have a rectangular shape with a long side extending along a first direction DR1 and a short side extending along a second direction DR2; however, the shape of the display panel DP is not limited to this. The display panel DP may include a display area DA and a non-display area NDA surrounding the display area DA.

[0111] The display panel DP may include multiple pixels PX, multiple scan lines SL1 to SLm, multiple data lines DL1 to DLn, multiple light-emitting lines EL1 to ELm, a first control line CSL1, a second control line CSL2, a first power line PL1, a second power line PL2, and a connecting line CNL. m and n are positive integers.

[0112] Pixels PX can be arranged in the display area DA. The scan driver unit SDV and the light-emitting driver unit EDV can be arranged in the non-display area NDA, which is adjacent to the long side of the display panel DP, respectively. The data driver unit DDV can be arranged in the non-display area NDA adjacent to any one of the short sides of the display panel DP. When viewed from a plane, the data driver unit DDV can be adjacent to the bottom edge of the display panel DP.

[0113] Scan lines SL1 to SLm can extend along the second direction DR2 and connect to pixel PX and scan drive unit SDV. Data lines DL1 to DLn can extend along the first direction DR1 and connect to pixel PX and data drive unit DDV. Light emission lines EL1 to ELm can extend along the second direction DR2 and connect to pixel PX and light emission drive unit EDV.

[0114] The first power line PL1 can extend along the first direction DR1 and be arranged in the non-display area NDA. The first power line PL1 can be arranged between the display area DA and the light-emitting drive unit EDV, but it is not limited thereto, and can be arranged between the display area DA and the scan drive unit SDV.

[0115] The connecting line CNL can extend along the second direction DR2 and be arranged along the first direction DR1. The connecting line CNL can be connected to the first power line PL1 and the pixel PX. A first voltage can be applied to the pixel PX through the interconnected first power line PL1 and connecting line CNL.

[0116] The second power line PL2 can be located in the non-display area NDA. The second power line PL2 can extend along the long side of the display panel DP and the other short side of the display panel DP where the data driver unit DDV is not located. The second power line PL2 can be located further outward than the scan driver unit SDV and the light-emitting driver unit EDV.

[0117] Although not illustrated, the second power line PL2 can extend toward the display area DA and connect to the pixel PX. A second voltage having a lower level than the first voltage can be applied to the pixel PX through the second power line PL2.

[0118] The first control line CSL1 can be connected to the scan driver unit SDV, and when viewed from a flat surface, it can extend towards the lower end of the display panel DP. The second control line CSL2 can be connected to the light-emitting driver unit EDV, and when viewed from a flat surface, it can extend towards the lower end of the display panel DP. The data driver unit DDV can be arranged between the first control line CSL1 and the second control line CSL2.

[0119] The first pad PD1 can be placed on the display panel DP. The first pad PD1 can be closer to the bottom of the display panel DP than the data driver unit DDV. The data driver unit DDV, the first power line PL1, the second power line PL2, the first control line CSL1, and the second control line CSL2 can be connected to the first pad PD1. Data lines DL1 to DLn can be connected to the data driver unit DDV, and the data driver unit DDV can be connected to the first pad PD1 corresponding to the data lines DL1 to DLn.

[0120] Although not shown, the display device DD may further include: a timing controller for controlling the operation of the scan drive unit SDV, the data drive unit DDV, and the light emission drive unit EDV; and a voltage generation unit for generating a first voltage and a second voltage. The timing controller and the voltage generation unit can be connected to the corresponding first pad PD1 via a printed circuit board.

[0121] The scan drive unit (SDV) can generate multiple scan signals, which can be applied to pixel PX through scan lines SL1 to SLm. The data drive unit (DDV) can generate multiple data voltages, which can be applied to pixel PX through data lines DL1 to DLn. The light emission drive unit (EDV) can generate multiple light emission signals, which can be applied to pixel PX through light emission lines EL1 to ELm.

[0122] A pixel (PX) can receive data voltage in response to a scan signal. A pixel (PX) can emit light of a brightness corresponding to the data voltage in response to a light emission signal to display an image. The emission time of a pixel (PX) can be controlled by the light emission signal.

[0123] Figure 11 Is Figure 5 The diagram shows a plan view of the input sensing unit.

[0124] Reference Figure 11The input sensing unit (ISP) may include multiple electrodes TE1 and TE2, multiple wirings SNL1 and SNL2, and multiple second pads PD2 and third pads PD3. Electrodes TE1 and TE2 can be defined as touch sensing electrodes.

[0125] The planar area of ​​the input sensing unit (ISP) may include an active area AA and an inactive area NAA surrounding the active area AA. The active area AA may overlap with the display area DA, and the inactive area NAA may overlap with the non-display area NDA.

[0126] Electrodes TE1 and TE2 can be arranged in the active region AA, and the second pad PD2 and the third pad PD3 can be arranged in the inactive region NAA. Wiring SNL1 and SNL2 can be connected to one end of electrodes TE1 and TE2, and can extend to the inactive region NAA to connect to the second pad PD2 and the third pad PD3.

[0127] When viewed from a planar surface, the second pad PD2 and the third pad PD3 can be adjacent to the lower end of the input sensing unit ISP. The second pad PD2 and the third pad PD3 can be connected to the aforementioned printed circuit board. Although not shown, a driving unit for driving the input sensing unit ISP can be arranged on the printed circuit board and connected to the second pad PD2 and the third pad PD3.

[0128] Electrodes TE1 and TE2 may include: a plurality of first electrodes TE1 extending along a first direction DR1 and arranged along a second direction DR2; and a plurality of second electrodes TE2 extending along the second direction DR2 and arranged along the first direction DR1. The second electrodes TE2 may extend in a manner that is insulated from and intersects with the first electrodes TE1. A capacitor can be formed by the first electrodes TE1 and the second electrodes TE2.

[0129] An opening OP may be defined on the first electrode TE1, overlapping with the folded region FA. The portion of the first electrode TE1 that overlaps with the first non-folded region NFA1 and the second non-folded region NFA2 may not have an opening OP defined. The shape of the opening OP will be described in more detail below.

[0130] The wiring SNL1 and SNL2 may include a plurality of first signal wirings SNL1 connected to the first electrode TE1 and a plurality of second signal wirings SNL2 connected to the second electrode TE2. For example, the first signal wirings SNL1 may be disposed in the inactive region NAA adjacent to the lower end of the input sensing unit ISP and connected to the second pad PD2. For example, the second signal wirings SNL2 may be disposed in the inactive region NAA adjacent to the left side of the input sensing unit ISP and connected to the third pad PD3.

[0131] Figure 12This is an example of an arrangement in Figure 6 The diagram shown in the middle depicts a cross-section of any pixel on the display panel and the input sensing element arranged on the pixel.

[0132] Reference Figure 12 The pixel PX can be arranged on the substrate SUB and can include a transistor TR and a light-emitting element OLED. The light-emitting element OLED can include a first electrode AE, a second electrode CE, a hole control layer HCL, an electron control layer ECL, and a light-emitting layer EML. The first electrode AE ​​can be an anode electrode, and the second electrode CE can be a cathode electrode.

[0133] The transistor TR and the light-emitting element OLED can be arranged on the substrate SUB. Although a transistor TR is illustrated by way of example, in practice, the pixel PX may include multiple transistors for driving the light-emitting element OLED and at least one capacitor.

[0134] The display area DA may include the light-emitting area PA corresponding to the pixel PX and the non-light-emitting area NPA surrounding the light-emitting area PA. The light-emitting element OLED may be arranged in the light-emitting area PA.

[0135] A buffer layer BFL may be disposed on the substrate SUB, and the buffer layer BFL may be an inorganic layer. A semiconductor pattern may be disposed on the buffer layer BFL. The semiconductor pattern may include polycrystalline silicon. However, it is not limited to this, and the semiconductor pattern may also include amorphous silicon or metal oxide.

[0136] Semiconductor patterns can be doped with N-type or P-type dopants. The electrical properties of a semiconductor pattern vary depending on whether it is doped or not. A semiconductor pattern can include highly doped and lightly doped regions. The conductivity of highly doped regions is greater than that of lightly doped regions, and they can essentially function as the source and drain of a transistor (TR). Lightly doped regions can essentially correspond to the active region (or channel) of a transistor.

[0137] The source (S), active region (A), and drain (D) of transistor TR can be formed from a semiconductor pattern. A first insulating layer (INS1) can be disposed on the semiconductor pattern. The gate (G) of transistor TR can be disposed on the first insulating layer (INS1). A second insulating layer (INS2) can be disposed on the gate (G). A third insulating layer (INS3) can be disposed on the second insulating layer (INS2).

[0138] The connecting electrode CNE can be arranged between the transistor TR and the light-emitting element OLED to connect the transistor TR and the light-emitting element OLED. The connecting electrode CNE may include a first connecting electrode CNE1 and a second connecting electrode CNE2.

[0139] The first connecting electrode CNE1 can be disposed on the third insulating layer INS3 and can be connected to the drain electrode D through the first contact hole CH1 defined in the first insulating layer INS1 to the third insulating layer INS3. The fourth insulating layer INS4 can be disposed on the first connecting electrode CNE1. A fifth insulating layer INS5 can be disposed on the fourth insulating layer INS4.

[0140] The second connecting electrode CNE2 can be disposed on the fifth insulating layer INS5. The second connecting electrode CNE2 can be connected to the first connecting electrode CNE1 through the second contact hole CH2 defined in the fifth insulating layer INS5. A sixth insulating layer INS6 can be disposed on the second connecting electrode CNE2. The first insulating layer INS1 to the sixth insulating layer INS6 can be inorganic or organic layers.

[0141] A first electrode AE ​​can be disposed on the sixth insulating layer INS6. The first electrode AE ​​can be connected to the second connecting electrode CNE2 through a third contact hole CH3 defined in the sixth insulating layer INS6. A pixel definition film PDL that exposes a predetermined portion of the first electrode AE ​​can be disposed on the first electrode AE ​​and the sixth insulating layer INS6. An opening PX_OP for exposing the predetermined portion of the first electrode AE ​​can be defined in the pixel definition film PDL.

[0142] The hole control layer (HCL) can be disposed on the first electrode (AE) and the pixel definition film (PDL). The HCL can also be disposed together in the light-emitting region (PA) and the non-light-emitting region (NPA). The HCL may include a hole transport layer and a hole injection layer.

[0143] The luminescent layer (EML) can be disposed on the hole control layer (HCL). The EML can be disposed in the region corresponding to the opening (PX_OP). The EML can include organic and / or inorganic materials. The EML can generate any one of red, green, and blue light.

[0144] The electronic control layer (ECL) can be disposed on the light-emitting layer (EML) and the hole control layer (HCL). The ECL can also be disposed together in the light-emitting region (PA) and the non-light-emitting region (NPA). The ECL may include an electron transport layer and an electron injection layer.

[0145] The second electrode CE can be disposed on the electronic control layer ECL. The second electrode CE can also be disposed together on the pixel PX. The layer from the buffer layer BFL to the sixth insulating layer INS6 can be defined as the circuit element layer DP-CL. The layer on which the light-emitting element OLED is disposed can be defined as the display element layer DP-OLED.

[0146] The thin-film encapsulation layer TFE can be disposed on the light-emitting element OLED. The thin-film encapsulation layer TFE can be disposed on the second electrode CE to cover the pixel PX.

[0147] A first voltage can be applied to the first electrode AE ​​via transistor TR, and a second voltage with a level lower than the first voltage can be applied to the second electrode CE. Holes and electrons injected into the light-emitting layer EML combine to form excitons, and as the excitons transition to the ground state, the light-emitting element OLED can emit light.

[0148] A first conductive layer TS-CL1 may be disposed beneath the base substrate BS, and a first insulating layer IL1 may be disposed beneath the base substrate BS such that it covers the first conductive layer TS-CL1. The first conductive layer TS-CL1 may form a bridging pattern as will be described below.

[0149] A second conductive layer TS-CL2 can be disposed below the first insulating layer IL1, and the second insulating layer IL2 can be disposed below the first insulating layer IL1 in a manner that covers the second conductive layer TS-CL2. The second conductive layer TS-CL2 can form the aforementioned first electrode TE1 and second electrode TE2.

[0150] The second conductive layer TS-CL2 can be connected to the first conductive layer TS-CL1 through the contact hole TS-CH defined in the first insulating layer IL1. Essentially, the pattern of the first electrode TE1 can be connected to the bridging pattern through the contact hole TS-CH, and this structure will be as follows: Figure 14 The explanation is provided below.

[0151] A second adhesive layer AL2 may be disposed between the second insulating layer IL2 and the thin film encapsulation layer TFE. The first conductive layer TS-CL1 and the second conductive layer TS-CL2 can be attached to the display panel DP via the second adhesive layer AL2.

[0152] A parasitic capacitance Cb can be formed between the input sensing unit ISP and the second electrode CE. As the distance between the input sensing unit ISP and the second electrode CE decreases, the value of the parasitic capacitance Cb can increase. As the parasitic capacitance Cb increases, the ratio of the change in capacitance formed in the input sensing unit ISP can decrease relative to a reference value. The change in capacitance can be expressed by means of an input method (e.g., in…). Figure 1 The diagram shows the change in capacitance that occurs before and after input (by an active pen or touch).

[0153] The drive unit that processes the signal sensed by the input sensing unit (ISP) can perform a balancing operation to remove the value corresponding to the parasitic capacitance Cb from the sensed signal. Through this balancing operation, the ratio of the capacitance change to a reference value can be increased, thereby improving sensing sensitivity.

[0154] However, depending on the specifications of the driver unit, there may be differences in the ability to remove the value corresponding to the parasitic capacitance Cb. For example, if the maximum parasitic capacitance Cb is 500 picofarads, and the driver unit can remove a capacitance value of 200 picofarads from the signal sensed by the input sensing unit (ISP), then the value corresponding to the parasitic capacitance Cb may not be sufficiently removed. In this case, the change in capacitance is very small compared to the reference value, so the driver unit may identify the change in capacitance as noise or fail to identify it, resulting in a malfunction where the touch coordinates cannot be sensed.

[0155] In embodiments of the present invention, the input sensing unit ISP can be configured to keep the maximum value of the parasitic capacitance Cb below a predetermined value. To this end, the size of the electrodes of the input sensing unit ISP and the distance between them and the second electrode CE can be adjusted. In this case, even if the performance of the driving unit is relatively low, the accuracy of coordinate recognition can be improved. In embodiments of the present invention, the maximum value of the parasitic capacitance Cb can be 200 picofarads or less, but it is not particularly limited to this.

[0156] Figure 13 Is Figure 11 The image shows an enlarged view of the first region AA1 in the diagram. Figure 14 It is arranged in Figure 13 The diagram shows a cross-sectional view of the input sensing section of the bridging pattern.

[0157] For example, in Figure 14 In the middle, the base substrate BS has electrodes TE1 and TE2 arranged at a lower position.

[0158] Reference Figure 13 and Figure 14 The bridging pattern BRP can be disposed on the base substrate BS. The bridging pattern BRP can be formed by the first conductive layer TS-CL1.

[0159] The first electrode TE1 and the second electrode TE2 can be disposed on the same layer. The first electrode TE1 and the second electrode TE2 can be disposed on a layer different from the bridging pattern BRP. The first electrode TE1 and the second electrode TE2 can be disposed on the first insulating layer IL1. The first electrode TE1 and the second electrode TE2 can be formed by the second conductive layer TS-CL2.

[0160] The first electrode TE1 may include a plurality of first patterns PTN1 arranged along a first direction DR1. The second electrode TE2 may extend along a second direction DR2 through the spaces between the first patterns PTN1.

[0161] Although the first pattern PTN1 may include a protruding pattern extending along the first direction DR1, the shape of the first pattern PTN1 is not limited thereto. The second electrode TE2 disposed between the first patterns PTN1 may include a protruding pattern extending along the first direction DR1, but the shape of the second electrode TE2 is not limited thereto.

[0162] The first pattern PTN1 can be connected to the bridging pattern BRP. For example, the first pattern PTN1 can be connected to the bridging pattern BRP through the contact hole TS-CH defined in the first insulating layer IL1. The first patterns PTN1 can be electrically connected to each other through the bridging pattern BRP.

[0163] For example, the bridging pattern BRP is arranged below the first electrode TE1 and the second electrode TE2; however, it is not limited thereto, the bridging pattern BRP may be arranged above the first electrode TE1 and the second electrode TE2.

[0164] For example, although a bridging pattern BRP is used, it is also possible to use a bridging pattern BRP without it. In this case, the first electrode TE1 and the second electrode TE2 can be arranged on different layers, and the first electrode TE1 can be formed as a single unit and extend along the first direction DR1 instead of being separated into the first pattern PTN1.

[0165] Figure 15 It is used to explain in Figure 11 The diagram shows the first operating mode of the input sensing unit. Figure 16 and Figure 17 It is used to explain in Figure 11 The diagram shows the second operating mode of the input sensing unit.

[0166] For example, Figures 15 to 17 The illustration shows that Figure 12 The diagram shows the planar configuration of the first electrode TE1 and the second electrode TE2.

[0167] Reference Figure 15 The input sensing unit ISP can be driven in a first mode. In the first mode, the input sensing unit ISP can sense input via the touch TC. In the first mode, the driving unit TS-IC can sense the change in mutual capacitance formed between the first electrode TE1 and the second electrode TE2 to sense external input. The driving unit TS-IC can be disposed on a printed circuit board and connected to the input sensing unit ISP.

[0168] In the first mode, the drive unit TS-IC can provide a drive signal TSN to the first electrode TE1 and receive a sensing signal RSN from the second electrode TE2. That is, in the first mode, the first electrode TE1 can function as a transmitting electrode, and the second electrode TE2 can function as a receiving electrode. However, it is not limited to this; the first electrode TE1 can also function as a receiving electrode, and the second electrode TE2 can function as a transmitting electrode.

[0169] Reference Figure 16 and Figure 17 The input sensing unit (ISP) can be driven in a second mode. This second mode can be a mode where the display device (DD) and the input device (PEN) send and receive data with each other. Figure 16 The operation illustrated in the diagram could be the provision of a first signal from the display device DD to the input device PEN. Figure 17 The operation illustrated in the diagram could be the operation of providing a second signal from the input device PEN to the display device DD.

[0170] Reference Figure 16 Each of the first electrode TE1 and the second electrode TE2 can be used as a transmission electrode for providing the first signals TSN1a and TSN1b provided from the drive unit TS-IC to the input device PEN. The first signals TSN1a and TSN1b can be uplink signals. Exemplarily, both the first electrode TE1 and the second electrode TE2 can be used as transmission electrodes, but it is not limited to this; one of the first electrode TE1 and the second electrode TE2 can also be used as a transmission electrode.

[0171] Reference Figure 17 Each of the first electrode TE1 and the second electrode TE2 can be used as a receiving electrode for transmitting sensing signals RSN1a and RSN1b derived from the input device PEN to the driver unit TS-IC. The driver unit TS-IC can receive sensing signals RSN1a and RSN1b from the first electrode TE1 and the second electrode TE2. The sensing signals RSN1a and RSN1b can be signals that sense downlink signals.

[0172] Figure 18 Is Figure 11 An enlarged view of the portion of the first electrode with an opening, as defined in the diagram.

[0173] Reference Figure 18 The first electrode TE1 may include: a first part PT1, which overlaps with the folded region FA; and a plurality of second parts PT2, which overlap with the first unfolded region NFA1 and the second unfolded region NFA2.

[0174] An opening OP can be defined in the first part PT1. The first part PT1 can be folded around the folding axis FX. Because the opening OP is defined in the first part PT1, the first part PT1 can be folded more easily around the folding axis FX.

[0175] The opening OP can be arranged along a first direction DR1 and a second direction DR2. The opening OP can extend along the second direction DR2. The opening OP can include: a first horizontal opening HOP1, arranged along the second direction DR2; and a second horizontal opening HOP2, separated from the first horizontal opening HOP1 along the first direction DR1, and arranged along the second direction DR2.

[0176] When viewed from the first direction DR1, the first horizontal opening HOP1 may partially overlap with the second horizontal opening HOP2. The first horizontal opening HOP1 and the second horizontal opening HOP2 may be spaced apart along the first direction DR1 and arranged alternately along the second direction DR2. The first horizontal opening HOP1 and the second horizontal opening HOP2 may be arranged continuously along the first direction DR1.

[0177] The first part PT1 is defined with a first horizontal opening HOP1 and a second horizontal opening HOP2, so that the first part PT1 can be folded more easily with the folding axis FX as the center.

[0178] Figure 19 Is along Figure 18 The cross-sectional view of line I-I' shown in the figure.

[0179] Reference Figure 19 The opening OP can be arranged along a first direction DR1 and a third direction DR3. The opening OP can extend along the third direction DR3. The opening OP can include: a first vertical opening VOP1, arranged along the third direction DR3; and a second vertical opening VOP2, separated from the first vertical opening VOP1 along the first direction DR1, and arranged along the third direction DR3.

[0180] When viewed from the first direction DR1, the first vertical opening VOP1 may partially overlap with the second vertical opening VOP2. The first vertical opening VOP1 and the second vertical opening VOP2 may be spaced apart along the first direction DR1 and arranged alternately along the third direction DR3. The first vertical opening VOP1 and the second vertical opening VOP2 may be arranged continuously along the first direction DR1.

[0181] The first part PT1 is defined with a first vertical opening VOP1 and a second vertical opening VOP2, so that the first part PT1 can be folded more easily with the folding axis FX as the center.

[0182] Figure 20 Is along Figure 18 The cross-sectional view of line II-II' shown in the figure. Figure 21 The diagram is in Figure 20 The diagram shows the folded state of the input sensing unit.

[0183] For example, in Figure 20 In the figure, the base substrate BS, the first insulating layer IL1 and the second insulating layer IL2 are shown together with the first electrode TE1, and the second electrode TE2 is omitted.

[0184] Reference Figure 20 and Figure 21 When the display device DD is folded, the input sensing unit ISP can also be folded. An opening OP is defined on the first electrode TE1 of the input sensing unit ISP, overlapping with the folding region FA, thus making it easier to fold the first electrode TE1. Therefore, the input sensing unit ISP can be folded more easily.

[0185] Figure 22 The icon is touched. Figure 11 The diagram shows the state of the folded area in the input sensing unit. Figure 23 This is a flowchart illustrating a driving method for a display device according to an embodiment of the present invention.

[0186] The following, as required by the explanation, will be related to... Figure 15 Let's explain them together.

[0187] Reference Figure 15 , Figure 22 and Figure 23 The drive signal TSN may include a first drive voltage and a second drive voltage having a higher level than the first drive voltage. The drive unit TS-IC may apply the first drive voltage to the first electrode TE1.

[0188] In step S110, the display device DD can be touched. For example, a user can touch the input sensing unit ISP. In step S120, the touch position can be sensed by sensing the touch TC on the input sensing unit ISP.

[0189] In step S130, it can be confirmed whether the touch location is the folded region FA. Since the first electrode TE1 defines an opening OP, the portion of the first electrode TE1 defining the opening OP can have high resistance. Therefore, when the folded region FA is touched, the touch sensitivity may decrease.

[0190] When the touch location is the folded area FA, the first electrode TE1 touched in step S140 can be applied a boost signal. Figure 22In the example, one first electrode TE1 is touched; however, there can be multiple first electrodes TE1 that are touched. The boost signal can be a second drive voltage. The drive unit TS-IC can apply a second drive voltage with a higher level to the touched first electrode TE1.

[0191] In step S150, the touch sensitivity of the folded region FA can be sensed again. Since a second driving voltage with a higher level is applied to the first electrode TE1, the touch sensitivity of the folded region FA can be improved.

[0192] When the touch location is not a folded area FA, that is, when the touch location is a first non-folded area NFA1 or a second non-folded area NFA2, a touch event can occur in step S160. That is, the operation of the display device DD corresponding to the touch TC can be executed.

[0193] Figure 24 This is a diagram illustrating the configuration of an input sensing unit according to another embodiment of the present invention.

[0194] For example, Figure 24 To correspond to Figure 11 The floor plan is illustrated below. (The following is a comparison with...) Figure 11 The diagram shows different configurations of the input sensing unit (ISP). Figure 24 The configuration of the input sensing unit ISP_1 shown in the figure will be explained.

[0195] Reference Figure 24 The input sensing unit ISP_1 may include a first electrode TE1 and a second electrode TE2, a first signal wiring SNL1 and a second signal wiring SNL2, and a second pad PD2 and a third pad PD3. When viewed from a planar perspective, the second pad PD2 and the third pad PD3 may be arranged in the inactive region NAA adjacent to the right side of the input sensing unit ISP_1. The first signal wiring SNL1 and the second signal wiring SNL2 may be connected to the first electrode TE1, the second electrode TE2, the second pad PD2, and the third pad PD3.

[0196] The folded region FA', the first non-folded region NFA1', and the second non-folded region NFA2' can be arranged along the second direction DR2. The folding axis FX' can be parallel to the first direction DR1. The input sensing unit ISP_1 can be folded around the folding axis FX'.

[0197] An opening OP overlapping the folded region FA' can be defined on the second electrode TE2. Figure 11 Unlike other electrodes, the opening OP can be defined on the second electrode TE2. Since the second electrode TE2 has an opening OP that overlaps with the folding region FA', the second electrode TE2 can be folded more easily with the folding axis FX' as the center.

[0198] Figure 25 This is a diagram illustrating the configuration of the first electrode of the input sensing unit according to another embodiment of the present invention.

[0199] Reference Figure 25 The first electrode TE1' may include: a first portion PT1', overlapping the folded region FA; and multiple second portions PT2, overlapping the first unfolded region NFA1 and the second unfolded region NFA2. The opening OP may be defined in the first portion PT1'.

[0200] Using the second direction DR2 as a reference, the width of the first part PT1' can be smaller than the width of each of the second parts PT2. Because the width of the first part PT1' is reduced, the first part PT1' can be folded more easily.

[0201] Figure 26 This is a diagram illustrating the configuration of an input sensing unit according to another embodiment of the present invention.

[0202] For example, Figure 26 To correspond to Figure 11 The floor plan is illustrated below. (The following is a comparison with...) Figure 11 The diagram shows different configurations of the input sensing unit (ISP). Figure 26 The configuration of the input sensing unit ISP_2 shown in the figure will be explained.

[0203] Reference Figure 26 Each first electrode TE1 may include: a first main electrode ME1 extending along a first direction DR1; and a plurality of first sub-electrodes SE1 extending along the first direction DR1 and adjacent to both sides of the first main electrode ME1 along a second direction DR2. The first main electrode ME1 may be arranged between the first sub-electrodes SE1.

[0204] The first main electrode ME1 and the first sub-electrode SE1 can be connected to the second pad PD2 via the first signal wiring SNL1. In the second direction DR2, the width of each first sub-electrode SE1 can be smaller than the width of the first main electrode ME1. The opening OP can be defined as the portion of the first main electrode ME1 overlapping with the folded region FA and the portion of the first sub-electrode SE1 overlapping with the folded region FA.

[0205] Each second electrode TE2 may include: a second main electrode ME2 extending along a second direction DR2; and a plurality of second sub-electrodes SE2 extending along the second direction DR2 and adjacent to both sides of the second main electrode ME2 along a first direction DR1. The second main electrode ME2 may be arranged between the second sub-electrodes SE2.

[0206] The second main electrode ME2 and the second sub-electrode SE2 can be connected to the third pad PD3 via the second signal wiring SNL2. In the first direction DR1, the width of each second sub-electrode SE2 can be smaller than the width of the second main electrode ME2.

[0207] Figure 27 Is along Figure 26 The cross-sectional view of line Ⅲ-Ⅲ' shown in the figure. Figure 28 This is a diagram illustrating the signal of an input sensing unit that receives a first signal according to an embodiment of the present invention.

[0208] Reference Figure 27 and Figure 28 An anti-reflective layer RPL can be arranged on the input sensing unit ISP, and a window WIN can be arranged on the anti-reflective layer RPL. The input device PEN can be arranged on the window WIN to transmit the first signal SG1.

[0209] The input device PEN may include a sensing unit DT and a main body BD disposed on the sensing unit DT. The sensing unit DT may include a first electrode DT1 and a second electrode DT2 disposed on the first electrode DT1. The first electrode DT1 may be disposed at the end of the input device PEN. The second electrode DT2 may be disposed on the side of the main body BD.

[0210] The first electrode DT1 can transmit a first signal SG1. The first signal SG1 can have a first frequency. The first frequency can be from 100kHz to 140kHz. For example, the first frequency can be 120kHz. The first signal SG1 can form an electric field radiating with a predetermined width. The driving unit TS-IC can calculate a sensing signal IS-SG1 with a Gaussian distribution shape from the first electrode TE1 and the second electrode TE2 that sense the electric field.

[0211] The first signal SG1 may include a first sub-signal SG1a, a second sub-signal SG1b, and a third sub-signal SG1c. The first sub-signal SG1a, the second sub-signal SG1b, and the third sub-signal SG1c can be classified according to the angle at which the first signal SG1 is radiated.

[0212] The first main electrode ME1 can sense the second sub-signal SG1b. The first sub-electrode SE1 can sense the first sub-signal SG1a and the third sub-signal SG1c respectively.

[0213] Upon sensing the first sub-signal SG1a, the drive unit TS-IC can calculate a first sensing signal IS-SG1a for a first intensity S1 at a position P1 in the first sub-electrode SE1. Upon sensing the second sub-signal SG1b, the drive unit TS-IC can calculate a second sensing signal IS-SG1b for a second intensity S2 at a position P2 in the first main electrode ME1. Upon sensing the third sub-signal SG1c, the drive unit TS-IC can calculate a third sensing signal IS-SG1c for a third intensity S3 at another position P3 in the first sub-electrode SE1.

[0214] The drive unit TS-IC can combine the first sensing signal IS-SG1a, the second sensing signal IS-SG1b, and the third sensing signal IS-SG1c to calculate the sensing signal IS-SG1. The drive unit TS-IC can calculate the accurate coordinates of the position where the input device PEN is arranged using the sensing signal IS-SG1. By sensing more accurate coordinates through the first main electrode ME1 and the first sub-electrode SE1 adjacent to the first main electrode ME1, the linearity of the input provided in a line form can be improved.

[0215] Figure 29 The diagram shows the arrangement of... Figure 26 The diagram shows an input device on a portion of the input sensing section. Figure 30 Is Figure 29 The enlarged view of the second region AA2 in the diagram.

[0216] Reference Figure 29 and Figure 30 The second electrode DT2 can transmit a second signal SG2 in a direction perpendicular to the central axis ax of the input device PEN. The second signal SG2 can generate an electric field. The second signal SG2 can have a second frequency different from the first frequency of the first signal SG1. The second frequency can be from 210kHz to 250kHz. For example, the second frequency can be 230kHz.

[0217] The first electrode TE1 and the second electrode TE2 can sense the first signal SG1, enabling the drive unit TS-IC to calculate the first coordinate POT1. The first electrode TE1 and the second electrode TE2 can sense the second signal SG2, enabling the drive unit TS-IC to calculate the second coordinate POT2. The drive unit TS-IC can calculate the distance DS-PT between the first coordinate POT1 and the second coordinate POT2.

[0218] The driving unit TS-IC can calculate the angle AG of the input device PEN relative to the upper surface IS-T of the input sensing unit ISP using a right-angled triangle with the distance DS-DT between the first electrode DT1 and the second electrode DT2 and the distance DS-PT between the first coordinate POT1 and the second coordinate POT2. The input device PEN can be sufficiently close to the input sensing unit ISP, so that the distance between the first electrode DT1 and the upper surface IS-T can be a negligible value.

[0219] The first sub-electrode SE1 and the second sub-electrode SE2 can sense the second signal SG2. The driving unit TS-IC can use the signals sensed by the first sub-electrode SE1 and the second sub-electrode SE2 to correct the second coordinate POT2 of the angle AG of the input device PEN relative to the upper surface IS-T. Therefore, the coordinate accuracy of the second signal SG2 of the display device DD relative to the input device PEN can be improved. As a result, the sensing reliability of the display device DD can be improved.

[0220] Although the embodiments described above have been referenced, those skilled in the art will understand that various modifications and alterations can be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims. Furthermore, the embodiments disclosed herein are not intended to limit the technical concept of the invention, and all technical concepts within the scope of the claims and their equivalents should be understood as being included within the scope of the claims.

Claims

1. A display device comprising: a display panel including non-folded regions arranged in a first direction and folded regions arranged between the non-folded regions; a first electrode arranged on the display panel and extending in the first direction; and a second electrode arranged on the display panel, insulated from the first electrode, and extending in a second direction intersecting the first direction, wherein a plurality of opening portions overlapping the folded regions are defined in the first electrode, the plurality of opening portions are defined with empty spaces, in a plane defined by the first direction and the second direction, the plurality of opening portions extend in the second direction and are arranged in the second direction, and extend in a third direction intersecting the plane perpendicularly and are arranged in the third direction.

2. The display device according to claim 1, wherein the opening portions extend in the second direction and are arranged in the first direction and the second direction.

3. The display device according to claim 1, wherein the opening portions include: first horizontal opening portions arranged in the second direction; and second horizontal opening portions spaced apart from the first horizontal opening portions in the first direction and arranged in the second direction.

4. The display device according to claim 3, wherein the first horizontal opening portions and the second horizontal opening portions partially overlap when viewed from the first direction.

5. The display device according to claim 3, wherein the first horizontal opening portions and the second horizontal opening portions are alternately arranged.

6. The display device according to claim 5, wherein the opening portions include: first vertical opening portions arranged in the third direction; and second vertical opening portions spaced apart from the first vertical opening portions in the first direction and arranged in the third direction.

7. The display device according to claim 6, wherein the first vertical opening portions and the second vertical opening portions partially overlap when viewed from the first direction.

8. The display device according to claim 6, wherein the first vertical opening portions and the second vertical opening portions are alternately arranged.

9. The display device according to claim 1, further comprising: a driving portion that supplies a first driving voltage to the first electrode, wherein the first electrode is provided as a plurality of first electrodes, the second electrode is provided as a plurality of second electrodes, when the folded region is touched, the driving portion applies a second driving voltage having a higher level than the first driving voltage to a touched first electrode among the plurality of first electrodes.

10. The display device according to claim 1, further comprising: a base substrate arranged on the display panel; and an adhesive agent arranged below the base substrate, wherein the first electrode and the second electrode are arranged below the base substrate and attached to the display panel by the adhesive agent.

11. The display device according to claim 1, wherein the first electrode includes: a first portion overlapping the folded regions when viewed from a plane and defining the opening portions; and a plurality of second portions overlapping the non-folded regions when viewed from the plane. ​ ​ The folding region and the first portion are folded with a folding axis parallel to the second direction as a center.

12. The display device according to claim 11, wherein The width of the first portion is smaller than the width of each of the second portions with the second direction as a reference.

13. The display device according to claim 1, wherein The first electrode includes: a first main electrode extending in the first direction; and a plurality of first sub-electrodes extending in the first direction and having a width smaller than the width of the first main electrode in the second direction, wherein the first main electrode is arranged between the first sub-electrodes, and the opening portion is defined in the first main electrode and the first sub-electrodes.

14. The display device according to claim 1, wherein The second electrode includes: a second main electrode extending in the second direction; and a plurality of second sub-electrodes extending in the second direction and having a width smaller than the width of the second main electrode in the first direction, wherein the second main electrode is arranged between the second sub-electrodes.

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