Display device

Abstract

A display device is disclosed, comprising: a first touch electrode; a first touch pad electrically connected to the first touch electrode through a touch line; and a first dummy pad not connected to the touch line and arranged adjacent to the first touch pad, wherein the width of the first touch pad is greater than that of the first dummy pad.

Description

[0001] This application claims the priority of Korean Patent Application No. 10-2019-0034630 filed on March 26, 2019 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] The invention relates to a display device. Background Art

[0003] Recently, display devices such as organic light emitting devices and liquid crystal displays have become increasingly popular. Typically, a display device includes a display panel including pixels for displaying an image.

[0004] In addition, the display device may also include a touch sensing function that allows a user to interact with the display device while the display device displays an image. When the user touches the screen with a finger or a stylus, the display device senses a change in pressure, charge, or light applied to the screen, and the touch sensing function determines touch information, such as whether an object or icon is touched on the screen and / or the touch position of the user's touch relative to the screen. The display device may receive an image signal based on the touch information.

[0005] Regarding the display device, a driving device and a pad for inputting and outputting a signal for controlling the pixel may be provided. In addition, the display device may generate a touch detection signal when a user touches it, and a flexible printed circuit board (FPCB) in the form of an integrated circuit (IC) chip or a film may be coupled to the pad. Summary of the invention

[0006] According to an exemplary embodiment of the present invention, a display device includes: a first touch electrode; a first touch pad electrically connected to the first touch electrode through a touch line; and a first dummy pad not connected to the touch line and disposed adjacent to the first touch pad, wherein a width of the first touch pad is greater than a width of the first dummy pad.

[0007] In an exemplary embodiment of the present invention, the display device further includes: a first area and a second area adjacent to the first area, wherein the first touch pad is one of a plurality of first touch pads arranged in the first area; a plurality of second touch pads arranged in the second area; and a plurality of second dummy pads arranged in the second area, wherein the first dummy pad is one of a plurality of first dummy pads arranged in the first area, wherein the plurality of first touch pads and the plurality of first dummy pads are arranged along a first direction in the first area, and wherein the plurality of second touch pads and the plurality of second dummy pads are arranged along the first direction in the second area.

[0008] In an exemplary embodiment of the present invention, a plurality of first touch pads and a plurality of first dummy pads are alternately arranged in a first direction.

[0009] In an exemplary embodiment of the present invention, each of lower edges of the plurality of first touch pads in the first area faces at least one of upper edges of the plurality of second dummy pads in the second area with respect to a second direction crossing the first direction.

[0010] In an exemplary embodiment of the present invention, the display device also includes a second touch electrode, wherein the first touch electrode includes a plurality of first touch units arranged in a first direction and a plurality of first connectors connecting the plurality of first touch units to each other, and wherein the second touch electrode includes a plurality of second touch units arranged in a second direction and a plurality of second connectors connecting the plurality of second touch units to each other.

[0011] In an exemplary embodiment of the present invention, the first touch electrode includes a plurality of thin electrode lines crossing each other and openings between the plurality of thin electrode lines.

[0012] In an exemplary embodiment of the present invention, the display device further includes a flexible printed circuit substrate electrically connected to the first touch pad.

[0013] According to an exemplary embodiment of the present invention, a display device includes: a substrate including a display area and a non-display area; a pixel circuit arranged in the display area; an organic light-emitting element and a partition wall arranged on the pixel circuit; an encapsulation layer covering the pixel circuit, the organic light-emitting element and the partition wall; a first touch electrode arranged on the encapsulation layer; a first touch pad portion arranged in the non-display area; and a touch line electrically connecting the first touch electrode and the first touch pad portion to each other, wherein the first touch pad portion includes a first touch pad connected to the touch line and a first dummy pad arranged adjacent to the first touch pad and not connected to the touch line, and wherein a width of the first touch pad is greater than a width of the first dummy pad.

[0014] In an exemplary embodiment of the present invention, the first touch pad is one of a plurality of first touch pads, wherein the first dummy pad is one of the plurality of first dummy pads, and wherein each of the plurality of first dummy pads is disposed between adjacent first touch pads of the plurality of first touch pads.

[0015] In an exemplary embodiment of the present invention, the display device further includes a second touch pad portion, wherein the first touch pad portion is disposed adjacent to the first edge of the substrate, and wherein the second touch pad portion is disposed adjacent to the second edge of the substrate.

[0016] In an exemplary embodiment of the present invention, each of the first touch pad portion and the second touch pad portion includes both a first area and a second area separated from each other, and the display device further includes a plurality of second touch pads in the second area, wherein the plurality of first touch pads are arranged along a first direction in the first area, and wherein the plurality of second touch pads are arranged along the first direction in the second area.

[0017] In an exemplary embodiment of the present invention, the display device further includes a plurality of second dummy pads in the second area, wherein each of lower edges of the plurality of first touch pads in the first area faces at least one of upper edges of the plurality of second dummy pads in the second area with respect to a second direction crossing the first direction.

[0018] In an exemplary embodiment of the present invention, the plurality of first touch pads, the plurality of second touch pads, the plurality of first dummy pads, and the plurality of second dummy pads in the first touch pad portion all have a shape inclined toward the second edge of the substrate, and the plurality of first touch pads, the plurality of second touch pads, the plurality of first dummy pads, and the plurality of second dummy pads in the second touch pad portion all have a shape inclined toward the first edge of the substrate.

[0019] In an exemplary embodiment of the present invention, the display device also includes a second touch electrode, wherein the first touch electrode includes a plurality of first touch units arranged in a first direction and a plurality of first connectors connecting the plurality of first touch units to each other, and wherein the second touch electrode includes a plurality of second touch units arranged in a second direction and a plurality of second connectors connecting the plurality of second touch units to each other.

[0020] In an exemplary embodiment of the present invention, the display device further includes: an inorganic layer disposed on the encapsulation layer; and a planarization layer disposed on the inorganic layer, wherein a plurality of first connectors are disposed on the inorganic layer, wherein a plurality of first touch units, a plurality of second touch units, and a plurality of second connectors are disposed on the planarization layer, and wherein the planarization layer includes an opening, wherein the plurality of first connectors and the plurality of first touch units are connected through the opening.

[0021] In an exemplary embodiment of the present invention, the first touch electrode includes a plurality of thin electrode lines.

[0022] In an exemplary embodiment of the present invention, the first touch electrode includes an opening between a plurality of thin electrode lines crossing each other.

[0023] In an exemplary embodiment of the present invention, the thin electrode lines overlap the partition walls.

[0024] In an exemplary embodiment of the present invention, the display device further includes a conductive layer which is disposed on the encapsulation layer in the non-display area and connects the touch line and the first touch electrode to each other.

[0025] In an exemplary embodiment of the present invention, the display device further includes a flexible printed circuit substrate electrically connected to the first touch pad portion and the second touch pad portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A block diagram showing a display device according to an exemplary embodiment of the present invention is shown;

[0027] Figure 2 shows a top plan view of a display device according to an exemplary embodiment of the present invention;

[0028] Figure 3 Shows Figure 1 A top plan view of a touch area of ​​a display device;

[0029] Figure 4 Shows Figure 3 an enlarged layout diagram of a first touch pad portion;

[0030] Figure 5 Shows Figure 3 an enlarged layout diagram of a second touch pad portion;

[0031] Figure 6 Shows relative to Figure 3 A cross-sectional view of the display device taken along line VI-VI';

[0032] Figure 7 Shows Figure 3 an enlarged layout diagram of portion A; and

[0033] Figure 8 Shows relative to Figure 7 A cross-sectional view of the display device taken along line VIII-VIII'. DETAILED DESCRIPTION

[0034] Exemplary embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings. As those skilled in the art will appreciate, the described exemplary embodiments may be modified in various different ways and therefore should not be limited to the exemplary embodiments set forth herein.

[0035] In the drawings, like reference numerals may denote like elements or features, and thus their description may be omitted.

[0036] The size and thickness of each configuration and / or element shown in the drawings may be exaggerated for clarity, and the present invention is not limited thereto.

[0037] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, when an element is referred to as being "directly on" another element, there are no intervening elements.

[0038] Furthermore, throughout the specification, the phrase “on a plane” may mean viewing a target portion from the top, and the phrase “on a cross section” may mean viewing a cross section obtained by vertically cutting a target portion from the side.

[0039] Now refer to Figure 1 and Figure 2 A display device according to an exemplary embodiment of the present invention is described. Figure 1 A block diagram of a display device according to an exemplary embodiment of the present invention is shown.

[0040] Reference Figure 1 , the display device includes a display area DA, a gate driver 400 , a data driver 600 , and touch drivers 700 and 750 .

[0041] The display area DA includes a plurality of pixels PX. The pixels PX in the display area DA are used to display images, and the display area DA of the display device displays images through the plurality of pixels PX.

[0042] The gate driver 400 generates scan signals G1 to Gn corresponding to the externally provided driving power and control signals, and the gate driver 400 provides them to the corresponding gate lines 142. The pixels PX are selected by the scan signals G1 to Gn and sequentially receive data voltages D1 to Dm. The gate driver 400 may be provided on a substrate together with a pixel circuit in the form of a thin film transistor (or a plurality of thin film transistors), or the gate driver 400 may be installed in a chip formed on a substrate.

[0043] The data driver 600 generates data voltages D1 to Dm corresponding to externally supplied data and control signals and supplies them to the corresponding data lines 171. Each time the scan signals G1 to Gn are supplied, the data voltages D1 to Dm supplied to the corresponding data lines 171 are supplied to the pixels PX selected by the scan signals G1 to Gn. According to an exemplary embodiment of the present invention, the display device may further include an emission control driver for supplying an emission control signal.

[0044] The display device further includes a touch area TA for sensing a touch. Figure 1 FIG. 4 shows that the touch area TA is the same area as the display area DA. However, the present invention is not limited thereto. For example, the touch area TA may be offset relative to the display area DA, or may be set in an area wider or narrower than the display area DA.

[0045] The touch drivers 700 and 750 may transmit touch signals through the touch lines 720 and may sense touch positions. The touch drivers 700 and 750 may include a first touch driver 700 and a second touch driver 750. The first touch driver 700 may transmit touch input signals T1 to Ti to touch electrodes through the first touch lines 721, and the second touch driver 750 may receive touch output signals R1 to Rj through the second touch lines 722.

[0046] Figure 2 A top plan view of a display device according to an exemplary embodiment of the present invention is shown. The display device includes a display panel 100 and a flexible printed circuit substrate 500.

[0047] The display panel 100 includes a plurality of pixels PX, and includes a display area DA for displaying an image, a non-display area NA as an area other than the display area DA, and a touch area TA for sensing a user's touch.

[0048] A plurality of pixels PX are disposed in the display area DA, and a plurality of signal lines including a plurality of gate lines 142 and a plurality of data lines 171 are disposed therein and connected to the plurality of pixels PX.

[0049] The non-display area NA may be disposed to at least partially surround the display area DA. In the non-display area NA, elements or lines for generating or transmitting various signals applied to the display area DA may be disposed, and the gate driver 400 may be integrated therein.

[0050] A pad PA including a pad electrically connected to the flexible printed circuit substrate 500 is provided at one side of the non-display area NA. The pad PA includes a pixel driving pad PPA to which a signal line 640 for driving the pixel PX is connected and a touch pad TPA connected to the touch line 720.

[0051] The pixel driving pad part PPA may include a pad connected to a signal line 640 for driving the pixel PX. The signal line 640 for driving the pixel PX may include a data line 171, a clock signal line, a low voltage line for transmitting a low voltage, and a scan start signal line for transmitting a scan start signal.

[0052] The touch pad portion TPA may include a first touch pad portion TPA1 disposed on the left side of the pixel drive pad portion PPA and a second touch pad portion TPA2 disposed on the right side of the pixel drive pad portion PPA. For example, the pixel drive pad portion PPA may be disposed between the first touch pad portion TPA1 and the second touch pad portion TPA2. In other words, it has been described that the touch pad portion TPA is disposed on each side of the pixel drive pad portion PPA. However, the present invention is not limited to this. For example, the touch pad portion TPA may be disposed on one side of the pixel drive pad portion PPA. For example, in a cross-sectional view, the touch pad portion TPA and the pixel drive pad portion PPA may be disposed on the same layer.

[0053] The flexible printed circuit substrate 500 may be bent, and one side of the flexible printed circuit substrate 500 may overlap the pad portion PA of the display panel 100 and may be electrically connected to the pad portion PA in the non-display area NA of the display panel 100. For example, the flexible printed circuit substrate 500 may be electrically connected to the first touch pad portion TPA1 and the second touch pad portion TPA2. For example, the flexible printed circuit substrate 500 includes a data driver IC 550 for generating a data voltage, and the data voltage may be a grayscale voltage corresponding to an input image signal. In addition, Figure 1 The touch drivers 700 and 750 may be included in the data driver IC 550 , or may be manufactured as an additional driving chip and mounted on the flexible printed circuit substrate 500 .

[0054] Figure 3 Shows Figure 1 FIG. 4 is a top plan view of a touch area TA of a display device. The touch area TA of the display device includes a first touch electrode 450 and a second touch electrode 460.

[0055] The first touch electrode 450 includes a plurality of first touch units 451 having a polygonal shape (e.g., a rhombus shape), and a plurality of first connectors 452 for connecting the first touch units 451 to each other in a first direction x. The first touch electrode 450 may be a transmitter (Tx) touch electrode for transmitting a touch input signal. It has been described that the first touch unit 451 has a rhombus shape, but the first touch unit 451 is not limited to this shape.

[0056] The second touch electrode 460 may include a plurality of second touch units 461 having a polygonal shape (e.g., a rhombus shape), and a plurality of second connectors 462 for connecting the second touch units 461 to each other in the second direction y. The second touch electrode 460 may be a receiver (Rx) touch electrode for sending a touch output signal. It has been described that the second touch unit 461 has a rhombus shape, but the second touch unit 461 is not limited to this shape. For example, in a plan view, the first touch unit 451 is adjacent to the second touch unit 461, and the first connector 452 crosses the second connector 462.

[0057] The first touch electrode 450 is separated from the second touch electrode 460 by a predetermined interval, and capacitance may be formed between the first touch electrode 450 and the second touch electrode 460. When a user generates a touch, the capacitance formed between the first touch electrode 450 and the second touch electrode 460 changes, Figure 1 The first touch driver 700 and the second touch driver 750 may recognize such a change in capacitance to determine a touch position.

[0058] The first touch unit 451, the second touch unit 461, and the second connector 462 may be arranged on the same layer. The first connector 452 may be arranged on a layer different from the first touch unit 451, the second touch unit 461, and the second connector 462. For example, the first connector 452 may be arranged below the first touch unit 451, the second touch unit 461, and the second connector 462. However, the present invention is not limited thereto. For example, the first connector 452 may be arranged above the first touch unit 451, the second touch unit 461, and the second connector 462. It will be described that the first connector 452 may be connected to the first touch unit 451 through an opening.

[0059] The second touch unit 461 and the second connector 462 of the second touch electrode 460 may be formed integrally. For example, the first touch unit 451, the second touch unit 461 and the second connector 462 may be formed simultaneously in the same process stage. However, the second connector 462 may not be formed simultaneously with the first touch unit 451 and the second touch unit 461, and it may be formed separately in another process stage by using different materials.

[0060] In addition, in the present exemplary embodiment, it has been described that the first connector 452 is disposed on a layer different from the first touch unit 451, the second touch unit 461, and the second connector 462, but the present invention is not limited thereto. For example, the first touch unit 451, the second touch unit 461, and the first connector 452 may be disposed on the same layer, and the second connector 462 may be disposed on a layer different from the first touch unit 451, the second touch unit 461, and the first connector 452.

[0061] In an exemplary embodiment of the present invention, the first touch unit 451 and the first connector 452 of the first touch electrode 450 may be arranged on the same layer, the second touch unit 461 and the second connector 462 of the second touch electrode 460 may be arranged on the same layer, and the first touch electrode 450 and the second touch electrode 460 may be arranged on different layers from each other.

[0062] The first touch electrode 450 and the second touch electrode 460 may include a low resistance metal such as silver (Ag), aluminum (Al), copper (Cu), chromium (Cr) or nickel (Ni) or a conductive nanomaterial such as silver nanowire or carbon nanotube. The touch electrode (e.g., 450 and / or 460) has low resistance, so RC delay can be reduced, and it has flexibility, so it does not easily break when it is repeatedly deformed such as bent.

[0063] The touch line 720 is provided in the non-display area NA of the display panel 100. The touch line 720 includes a first touch line 721 and a second touch line 722. The first touch line 721 is connected to the first touch electrode 450, and the second touch line 722 is connected to the second touch electrode 460. The touch line 720 may extend in the non-display area NA and may be connected to the touch pad 610 of the touch pad portion TPA.

[0064] The touch pad portion TPA includes a touch pad 610 and a dummy pad 620. The touch pad 610 is connected to the touch line 720, and the dummy pad 620 is not connected to the touch line 720 and floats. The dummy pad 620 may be disposed between the touch pads 610. In addition, the touch pad 610 and the dummy pad 620 may be alternately disposed in the first direction x. For the sake of clarity, the sizes of the touch electrodes 450 and 460 and the touch pad 610 may be exaggerated, and the display device may include a different number of touch electrodes 450 and 460 and the touch pad 610.

[0065] Figure 4 Shows Figure 3 FIG. 1 is an enlarged layout diagram of the first touch pad portion TPA1 . The first touch pad portion TPA1 includes a touch pad 610 and a dummy pad 620 .

[0066] The touch pad 610 is electrically connected to the first touch electrode 450 or the second touch electrode 460 through the touch line 720. The touch pad 610 may have a quadrilateral shape. For example, the touch pad 610 may have a rhombus shape, a square shape, or a rectangular shape. As another example, the touch pad 610 may have a quadrilateral shape including an upper portion that is inclined or slanted toward, for example, the right side of the display panel 100. In other words, the lateral side of the touch pad 610 may form an oblique line extending toward the upper right side of the touch pad 610. When the touch pad 610 is formed to have an inclined quadrilateral shape (e.g., a rhombus shape) instead of a rectangular shape, it is easier to align the touch pad 610 than when the touch pad is formed to have a rectangular shape.

[0067] The touch pads 610 may be arranged in two rows. In other words, in a plan view, the first touch pad portion TPA1 may include a first region 651 and a second region 652 disposed below the first region 651. The first region 651 and the second region 652 may extend in a first direction x, respectively. The first region 651 may be spaced apart from the second region 652 in a second direction y. The touch pads 610 are sequentially arranged in the first region 651 and the second region 652 in the first direction x.

[0068] The touch pad 610 disposed in the first area 651 and the touch pad 610 disposed in the second area 652 may receive signals different from each other. Therefore, compared with a case where the touch pad 610 disposed in the first area 651 and the touch pad 610 disposed in the second area 652 receive the same signal as each other, the display device according to the exemplary embodiment of the present invention can reduce the number of touch pads 610. As a result, a compressed area of ​​the touch pad 610 can be obtained, and the size of the touch pad 610 can also be increased. In addition, the number of touch wires 720 can be minimized, and thus the thickness of the touch wires 720 can be increased.

[0069] The dummy pad 620 is disposed between the touch pads 610. The touch pad 610 and the dummy pad 620 may be alternately disposed relative to the first direction x. The dummy pad 620 may be in a floating state while not being connected to the first touch electrode 450 and the second touch electrode 460. In other words, the dummy pad 620 may not receive any voltage. With respect to the display device according to an exemplary embodiment of the present invention, the dummy pad 620 may be disposed between the touch pads 610 to prevent signal interference or noise that may be generated between adjacent touch pads 610.

[0070] In the first touch pad portion TPA1 and the second touch pad portion TPA2, at least one dummy pad 620 may be disposed in an area separated from the touch pad 610 in the second direction y. For example, a lower edge of the touch pad 610 disposed in the first area 651 may face at least one upper edge of the dummy pad 620 disposed in the second area 652 with respect to the second direction y. In addition, an upper edge of the touch pad 610 disposed in the second area 652 may face at least one lower edge of the dummy pad 620 disposed in the first area 651 with respect to the second direction y. Therefore, noise that may be generated between the touch pads 610 adjacent in the first direction x and noise that may be generated between the touch pads 610 adjacent in the second direction y may be prevented.

[0071] The width w1 of the touch pad 610 may be greater than the width w2 of the dummy pad 620. In this case, the width refers to the length in the first direction x. Since the number of touch pads 610 is minimized, the width w1 of the touch pad 610 in the same space may be increased. Therefore, access defects that may be generated in the touch pad 610 may be prevented.

[0072] The touch line 720 connected to the touch pad 610 disposed in the second area 652 may extend to pass between the touch pad 610 disposed in the first area 651 and the dummy pad 620 .

[0073] Figure 5 Shows Figure 3 FIG. 1 is a layout diagram of an enlarged second touch pad portion TPA2. The second touch pad portion TPA2 includes a touch pad 610 and a dummy pad 620. The second touch pad portion TPA2 is similar to the reference 4 except for the shape of the touch pad 610. Figure 4 The illustrated first touch pad portion TPA1 is similar, and thus repeated or redundant contents will not be described again.

[0074] The touch pad 610 of the second touch pad portion TPA2 may have a quadrilateral shape. For example, the touch pad 610 may have a rhombus shape, a square shape, or a rectangular shape. As another example, the touch pad 610 may have a quadrilateral shape including an upper portion that is inclined or slanted, for example, toward the left side of the display panel 100. In other words, the lateral side of the touch pad 610 may form an oblique line extending toward the upper left side of the touch pad 610. When the touch pad 610 is formed to have an inclined quadrilateral shape (e.g., a rhombus shape), it is easier to align the touch pad 610 than when the touch pad is formed to have a rectangular shape.

[0075] The second touch pad portion TPA2 may include a first area 651 and a second area 652 disposed below the first area 651. The first area 651 may be spaced apart from the second area 652 in the second direction y. The touch pad 610 is sequentially disposed in the first area 651 and the second area 652 in the first direction x.

[0076] The touch pad 610 disposed in the first area 651 and the touch pad 610 disposed in the second area 652 may receive different signals.

[0077] The dummy pad 620 is disposed between the touch pads 610, and the dummy pad 620 floats while not being connected to the first touch electrode 450 and the second touch electrode 460. In other words, the dummy pad 620 may not receive any voltage.

[0078] At least one dummy pad 620 may be disposed in an area spaced apart from the touch pad 610 in the second direction y. For example, a lower edge of the touch pad 610 disposed in the first area 651 may face at least one upper edge of the dummy pad 620 disposed in the second area 652 with respect to the second direction y. In addition, an upper edge of the touch pad 610 disposed in the second area 652 may face at least one lower edge of the dummy pad 620 disposed in the first area 651 with respect to the second direction y.

[0079] The width w1 of the touch pad 610 may be greater than the width w2 of the dummy pad 620. Since the number of the touch pads 610 is minimized, the width w1 of the touch pads 610 in the same space may be increased.

[0080] Figure 6 Shows relative to Figure 3 A cross-sectional view of the display device taken along line VI-VI'.

[0081] Reference Figure 6 , the display panel 100 includes a substrate 110. The substrate 110 may include a flexible material such as plastic that may be bent, folded, or rolled. The substrate 110 may also include the above-mentioned display area DA and non-display area NA.

[0082] The display layer 200 is disposed in the display area DA of the substrate 110. The display layer 200 includes a pixel circuit including at least one thin film transistor, an organic light emitting element whose light emission is controlled by the pixel circuit, and a partition wall for partitioning emission areas.

[0083] The encapsulation layer 390 for covering the display layer 200 is disposed on the display layer 200. For example, the encapsulation layer 390 may seal the display layer 200 by covering the upper side and the lateral side of the display layer 200. The encapsulation layer 390 may be disposed on the front side of the display area DA and may extend from the display area DA, and an end portion of the encapsulation layer 390 may be disposed in the non-display area NA.

[0084] When the display device is an organic light-emitting device, the organic light-emitting element is very weak or sensitive to moisture and oxygen, so that the display device may be damaged, so the encapsulation layer 390 seals the display layer 200 to intercept or prevent the inflow of external moisture and oxygen. The encapsulation layer 390 may include a plurality of layers, and it may be formed of a multilayer structure including an inorganic film and an organic film. For example, it may be formed of three layers in which an inorganic film, an organic film, and an inorganic film are sequentially formed.

[0085] The inorganic layer 410 may be disposed on the encapsulation layer 390. The inorganic layer 410 may include at least one of metal oxide, metal oxynitride, silicon oxide, silicon nitride, and silicon oxynitride.

[0086] The planarization layer 420 is disposed on the inorganic layer 410. The planarization layer 420 may include an organic material such as an acryl-based resin.

[0087] The second touch unit 461 is disposed on the planarization layer 420. The second touch unit 461 is electrically connected to the touch pad 610 through a connection member (e.g., a conductive layer) 635 and a second touch line 722. For example, the connection member 635 may be disposed on the encapsulation layer 390 in the non-display area NA. In addition, the connection member 635 may extend to the edge of the encapsulation layer 390, and it may be electrically connected to the second touch line 722 disposed on the substrate 110. As another example, the connection member 635 may be disposed on the encapsulation layer 390 and partially disposed on the substrate 110. The connection member 635 may include a conductive cured material.

[0088] In an exemplary embodiment of the present invention, the first touch unit 451 may be electrically connected to the touch pad 610 through a connection member disposed on the encapsulation layer 390 and a first touch wire 721 .

[0089] Figure 7 Shows Figure 3 An enlarged layout diagram of portion A. Figure 7 4 shows that the first touch unit 451 of the first touch electrode 450 and the second touch unit 461 of the second touch electrode 460 are separated from the first connector 452 provided on different layers.

[0090] Reference Figure 7, the first touch electrode 450 and the second touch electrode 460 may be formed into a grid pattern. In this case, the first touch electrode 450 and the second touch electrode 460 include a plurality of thin electrode lines 470, and the plurality of thin electrode lines 470 have a thin width and are arranged parallel to the third direction and the fourth direction intersecting the third direction (for example, the fourth direction is substantially perpendicular to the third direction). The thin electrode lines 470 include the thin electrode lines 451a of the first touch unit 451 and the thin electrode lines 452a of the first connector 452. The thin electrode lines 470 also include the thin electrode lines 461a of the second touch unit 461 and the thin electrode lines 462a of the second connector 462. The thin electrode lines 470 arranged in the third direction and the thin electrode lines 470 arranged in the fourth direction cross each other, thereby forming an opening having a rhombus shape. For example, according to the arrangement of the thin electrode lines 470, the grid pattern of the first touch electrode 450 and the second touch electrode 460 may have a constant lattice shape.

[0091] The first touch electrode 450 and the second touch electrode 460 are formed of a plurality of thin electrode lines 470, which do not intercept light emitted by the organic light emitting device and can reduce the area of ​​overlapping lines of the display panel 100, thereby minimizing parasitic capacitance.

[0092] It has been described that the first touch electrode 450 and the second touch electrode 460 include a rhombus-shaped opening, but the shape of the opening is not limited thereto, and it can have various shapes such as a quadrilateral shape or a polygonal shape. In addition, the third direction and the fourth direction along which the thin electrode line 470 extends are not limited to the oblique direction, and they can be parallel to the first direction or the second direction.

[0093] The first connector 452 may be disposed below the first touch unit 451, the second touch unit 461, and the second connector 462. Figure 7 The first connector 452 is connected to the first touch unit 451 in a region overlapping the first touch unit 451.

[0094] Figure 8 Shows relative to Figure 7 A cross-sectional view of the display device taken along line VIII-VIII'.

[0095] The display device includes a substrate 110, and a buffer layer 121 is disposed on the substrate 110. For example, the buffer layer 121 may include silicon nitride (SiN x ) or silicon oxide (SiO x). The buffer layer 121 is disposed between the substrate 110 and the semiconductor layer 154. The buffer layer 121 may prevent impurities from penetrating from the substrate 110 during a crystallization process of forming polysilicon, and the buffer layer 121 may planarize the substrate 110, thereby releasing stress of the semiconductor layer 154 formed on the buffer layer 121.

[0096] The semiconductor layer 154 is disposed on the buffer layer 121. The semiconductor layer 154 may be made of polycrystalline silicon or an oxide semiconductor. The semiconductor layer 154 includes a channel region 152, a source region 151, and a drain region 153. The source region 151 and the drain region 153 are disposed on each side of the channel region 152. The channel region 152 is an intrinsic semiconductor in which no impurities are doped, and the source region 151 and the drain region 153 are impurity semiconductors in which conductive impurities are doped. The semiconductor layer 154 may be made of an oxide semiconductor, in which case an additional passivation layer may be provided to protect the oxide semiconductor material which is weaker in an external environment such as high temperature.

[0097] The gate insulating layer 122 is disposed on the semiconductor layer 154 to cover the semiconductor layer 154. The gate insulating layer 122 may include silicon nitride (SiN x ) and silicon oxide (SiO x ) has a single-layer structure or a multi-layer structure of at least one of the above.

[0098] The gate electrode 155 is disposed on the gate insulating layer 122 and may be a multilayer structure in which metal films including one of copper (Cu), copper alloy, aluminum (Al), aluminum alloy, molybdenum (Mo), and / or molybdenum alloy are stacked.

[0099] The interlayer insulating layer 123 is disposed on the gate electrode 155 and the gate insulating layer 122. For example, the interlayer insulating layer 123 may include silicon nitride (SiN x ) or silicon oxide (SiO x ). Openings for respectively exposing the source region 151 and the drain region 153 are provided in the interlayer insulating layer 123.

[0100] The source electrode 161 and the drain electrode 162 are disposed on the interlayer insulating layer 123. The source electrode 161 and the drain electrode 162 are connected to the source region 151 and the drain region 153 of the semiconductor layer 154 through openings formed in the interlayer insulating layer 123 and the gate insulating layer 122, respectively.

[0101] The passivation layer 180 is disposed on the interlayer insulating layer 123, the source electrode 161, and the drain electrode 162. The passivation layer 180 covers the interlayer insulating layer 123, the source electrode 161, and the drain electrode 162 to planarize them, so that the pixel electrode 191 can be formed on the passivation layer 180 without a step or uneven surface. The passivation layer 180 may be made of an organic material such as a polyacrylate resin or a polyimide resin, or may be made of a stacked film of an organic material and an inorganic material.

[0102] The pixel electrode 191 is disposed on the passivation layer 180. The pixel electrode 191 is connected to the drain electrode 162 through the opening of the passivation layer 180.

[0103] A driving transistor constructed by the gate electrode 155, the semiconductor layer 154, the source electrode 161 and the drain electrode 162 is connected to the pixel electrode 191 to supply a driving current to the organic light emitting element OLED. Figure 8 In addition to the described driving transistor, the display device according to the present exemplary embodiment may further include a switching transistor connected to the data line 171 and transmitting a data voltage in response to a scan signal, and a compensation transistor connected to the driving transistor and compensating a threshold voltage of the driving transistor in response to the scan signal.

[0104] A partition wall 361 for covering the passivation layer 180 and the pixel electrode 191 is disposed on the passivation layer 180 and the pixel electrode 191, and the partition wall 361 includes a pixel opening 365 for exposing the pixel electrode 191. The partition wall 361 may include an organic material such as a polyacrylate resin or a polyimide resin or a silicon dioxide-based inorganic material. The pixel opening 365 may have a rhombus shape in a plan view. However, the present invention is not limited thereto. For example, the pixel opening 365 may have various shapes such as a quadrilateral shape or a polygonal shape.

[0105] The organic emission layer 370 is disposed on the pixel electrode 191 exposed by the pixel opening 365. The organic emission layer 370 may be made of a low molecular weight organic material or a high molecular weight organic material such as poly (3,4-ethylenedioxythiophene) (PEDOT). In addition, the organic emission layer 370 may be a multi-layer structure further comprising one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL) and / or an electron injection layer (EIL).

[0106] The common electrode 270 is disposed on the organic emission layer 370. The common electrode 270 may be disposed on a plurality of pixels. The pixel electrode 191, the organic emission layer 370, and the common electrode 270 may form an organic light emitting diode OLED.

[0107] Here, the pixel electrode 191 may be an anode as a hole injection electrode, and the common electrode 270 may be a cathode as an electron injection electrode. However, exemplary embodiments of the present invention are not limited thereto, and according to a method for driving an organic light-emitting device, the pixel electrode 191 may be a cathode, and the common electrode 270 may be an anode. When holes and electrons are injected from the pixel electrode 191 and the common electrode 270 into the organic emission layer 370, and excitons as a combination of the injected holes and electrons transition from an excited state to a ground state, light emission is performed during the transition.

[0108] The encapsulation layer 390 is disposed on the common electrode 270. Figure 6 The encapsulation layers described correspond to each other and are therefore omitted here.

[0109] The inorganic layer 410 is disposed on the encapsulation layer 390. The inorganic layer 410 may include at least one of metal oxide, metal oxynitride, silicon oxide, silicon nitride, and silicon oxynitride. The inorganic layer 410 may cover the encapsulation layer 390 to protect the encapsulation layer 390 and prevent the penetration of moisture. In addition, the inorganic layer 410 may be used to reduce the parasitic capacitance between the common electrode 270 and the touch electrode.

[0110] The thin electrode lines 452 a of the first connector 452 are disposed on the inorganic layer 410 , and the planarization layer 420 is disposed on the thin electrode lines 452 a of the first connector 452 .

[0111] The thin electrode line 451a of the first touch unit 451 is disposed on the planarization layer 420. In addition, although not shown here, the second touch unit 461 and the second connector 462 connected to the second touch unit 461 are disposed on the planarization layer 420. The first touch unit 451 is disposed adjacent to the second touch unit 461 in a plan view. The first connector 452 overlaps the second connector 462 in a plan view.

[0112] As reference Figure 7As described, the first touch unit 451 of the first touch electrode 450 overlaps with the area of ​​the first connector 452. In the area where the first touch unit 451 overlaps with the first connector 452, the first touch unit 451 is connected to the first connector 452 to contact each other. For example, the planarization layer 420 may include an opening 425, which is an area in which the first connector 452 is exposed, and when the thin electrode line 451a of the first touch unit 451 is formed on the planarization layer 420, the material for forming the thin electrode line 451a of the first touch unit 451 fills the opening 425 to contact the thin electrode line 452a of the first connector 452 and connect with it. For example, the first touch unit 451 is set on the planarization layer 420, and it can also be set in the opening 425 that exposes the first connector 452 and can be connected to the first connector 452.

[0113] The thin electrode line 451a of the first touch unit 451 and the thin electrode line 452a of the first connector 452 overlap the partition wall 361 and may be disposed in a region in which the partition wall 361 is disposed. Figure 7 The plurality of thin electrode lines 470 shown in FIG. 4 may have a shape corresponding to the partition wall 361 in a plan view. Therefore, the pixel opening 365 may overlap with the opening formed by the plurality of thin electrode lines 470. In this case, the plurality of thin electrode lines 470 may not be disposed in the entire region where the partition wall 361 is disposed, and may overlap with the partition wall 361. For example, only one pixel opening 365 may be disposed between adjacent thin electrode lines 470 among the plurality of thin electrode lines 470. However, the present invention is not limited thereto. For example, the plurality of pixel openings 365 may be disposed between adjacent thin electrode lines 470 among the plurality of thin electrode lines 470.

[0114] The touch electrode passivation layer 430 may be disposed on the thin electrode line 451a of the first touch unit 451. The touch electrode passivation layer 430 may cover the first touch electrode 450 and the second touch electrode 460 so that they may not be exposed to the outside, thereby protecting the first touch electrode 450 and the second touch electrode 460. The touch electrode passivation layer 430 may include a silicon nitride (SiN x ) or silicon oxide (SiO x ) and / or an organic material such as a polyacrylate resin or a polyimide resin.

[0115] Already in Figure 84 and 45. It is described in the figure that the first connector 452 is disposed under the planarization layer 420, and according to an exemplary embodiment, the positions of the first touch unit 451 and the second touch unit 461 and the second connector 462 and the first connector 452 are interchangeable. For example, the first touch unit 451, the second touch unit 461, and the second connector 462 may be formed on the inorganic layer 410 and covered by the planarization layer 420. In this case, the first connector 452 may be located on the planarization layer 420.

[0116] While the invention has been shown and described with reference to exemplary embodiments thereof, it will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A display device, comprising: a first touch electrode; a first touch pad electrically connected to the first touch electrode through a touch wire; a first dummy pad, not connected to the touch line and disposed adjacent to the first touch pad; a first area and a second area adjacent to the first area, wherein the first touch pad is one of a plurality of first touch pads disposed in the first area, and the first dummy pad is one of a plurality of first dummy pads disposed in the first area; a plurality of second touch pads disposed in the second area; and A plurality of second dummy pads are arranged in the second area, wherein the plurality of first touch pads and the plurality of first dummy pads are arranged along a first direction in the first area, and The plurality of second touch pads and the plurality of second dummy pads are arranged along the first direction in the second area.

2. The display device according to claim 1, in, A width of the first touch pad is greater than a width of the first dummy pad.

3. The display device according to claim 2, wherein: The plurality of first touch pads and the plurality of first dummy pads are alternately arranged in the first direction, and Each of lower edges of the plurality of first touch pads in the first region faces at least one of upper edges of the plurality of second dummy pads in the second region with respect to a second direction crossing the first direction.

4. The display device according to claim 3, further comprising a second touch electrode, in, The first touch electrode includes a plurality of first touch units arranged in the first direction and a plurality of first connectors connecting the plurality of first touch units to each other, wherein the second touch electrode includes a plurality of second touch units arranged in the second direction and a plurality of second connectors connecting the plurality of second touch units to each other, and The first touch electrode includes a plurality of thin electrode lines crossing each other and openings between the plurality of thin electrode lines.

5. A display device, comprising: A substrate, including a display area and a non-display area; A pixel circuit is arranged in the display area; An organic light emitting element and a partition wall are arranged on the pixel circuit; An encapsulation layer, covering the pixel circuit, the organic light emitting element and the partition wall; A first touch electrode, arranged on the encapsulation layer; A first touch pad portion, disposed in the non-display area; as well as a touch line electrically connecting the first touch electrode and the first touch pad portion to each other, The first touch pad portion includes a first touch pad connected to the touch line, a first dummy pad disposed adjacent to the first touch pad and not connected to the touch line, and a plurality of second touch pads and a plurality of second dummy pads. wherein the first touch pad is one of a plurality of first touch pads, and the first dummy pad is one of a plurality of first dummy pads, wherein the first touch pad portion includes a first area and a second area separated from each other, wherein the plurality of first touch pads are arranged along a first direction in the first area, and The plurality of second touch pads are arranged along the first direction in the second area.

6. The display device according to claim 5, in, A width of the first touch pad is greater than a width of the first dummy pad.

7. The display device according to claim 6, further comprising a second touch pad portion, in, Each of the plurality of first dummy pads is disposed between adjacent first touch pads among the plurality of first touch pads, and Wherein, the first touch pad portion is disposed adjacent to a first edge of the substrate, and wherein the second touch pad portion is disposed adjacent to a second edge of the substrate.

8. The display device according to claim 7, in, The second touch pad portion includes a first area and a second area separated from each other, the second touch pad portion includes a plurality of first touch pads connected to the touch line and a plurality of first dummy pads disposed adjacent to each of the plurality of first touch pads and not connected to the touch line, and a plurality of second touch pads and a plurality of second dummy pads in the second area, wherein the plurality of first touch pads in the second touch pad portion are arranged along a first direction in the first area; wherein the plurality of second touch pads in the second touch pad portion are arranged along the first direction in the second area, and wherein each of lower edges of the plurality of first touch pads in the first region faces at least one of upper edges of the plurality of second dummy pads in the second region with respect to a second direction crossing the first direction.

9. The display device according to claim 8, wherein: The plurality of first touch pads, the plurality of second touch pads, the plurality of first dummy pads, and the plurality of second dummy pads in the first touch pad portion all have a shape inclined toward the second edge of the substrate, and The plurality of first touch pads, the plurality of second touch pads, the plurality of first dummy pads, and the plurality of second dummy pads in the second touch pad portion all have a shape inclined toward the first edge of the substrate.

10. The display device according to claim 9, further comprising: a second touch electrode; an inorganic layer, disposed on the encapsulation layer; as well as a planarization layer, disposed on the inorganic layer, wherein the first touch electrode includes a plurality of first touch units arranged in the first direction and a plurality of first connectors connecting the plurality of first touch units to each other, wherein the second touch electrode includes a plurality of second touch units arranged in the second direction and a plurality of second connectors connecting the plurality of second touch units to each other, Wherein, the plurality of first connectors are arranged on the inorganic layer, wherein the plurality of first touch units, the plurality of second touch units and the plurality of second connectors are arranged on the planarization layer, wherein the planarization layer comprises an opening, wherein the plurality of first connectors and the plurality of first touch units are connected through the opening, Wherein, the first touch electrode comprises a plurality of thin electrode lines, and Wherein, the first touch electrode includes openings between the plurality of thin electrode lines crossing each other.

11. The display device according to claim 10, further comprising: a conductive layer disposed on the encapsulation layer in the non-display area and connecting the touch line and the first touch electrode to each other, and A flexible printed circuit substrate is electrically connected to the first touch pad portion and the second touch pad portion.

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