Transparent touch display device

Abstract

A transparent touch display device according to an embodiment of the present application can include a substrate including a pixel area, a first transmissive area on a first side of the pixel area, and a second transmissive area on a second side of the pixel area; a driving transistor disposed in the pixel area; an anode disposed in the pixel area, the anode being on the driving transistor and electrically connected with a source or a drain of the driving transistor; an emitting layer on the anode; a display cathode on the emitting layer; a first touch cathode disposed in the first transmissive area and on a first side of the display cathode; a second touch cathode disposed in the second transmissive area and on a second side of the display cathode; an encapsulation layer on the display cathode, the first touch cathode, and the second touch cathode; and a first touch line overlapping the first touch cathode.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0193833, filed on December 31, 2021, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] Embodiments of the present invention relate to a transparent touch display device. Background Technology

[0004] In display devices, touch display devices eliminate the need for buttons, keyboards, mice, or other typical input devices, providing an input mechanism that allows users to enter information or commands more easily and intuitively.

[0005] To provide touch-based input functionality, this touch display device includes a touch sensor structure and touch circuitry for touch sensing. The touch sensor structure may include multiple touch electrodes and multiple touch lines for connecting the touch electrodes to the touch circuitry. The touch sensing circuitry needs to operate according to the touch sensor structure.

[0006] Currently, efforts are ongoing to reduce the thickness of touch display devices and improve image quality, with ongoing development of touch display devices featuring built-in touch sensors that include multiple touch electrodes. Furthermore, there is a growing demand for transparent touch display devices, which include display panels with self-emissive light-emitting elements such as organic light-emitting diode (OLED) displays and that allow light to pass through. Summary of the Invention

[0007] In the traditional field of touch and display technology, touch display devices have been developed that incorporate touch sensors built into the display panel to reduce thickness and improve image quality. However, if the touch display device with a built-in touchscreen is a self-emissive display device with a self-emissive element such as an organic light-emitting diode (OLED) display and is a transparent display device that transmits light, it is difficult to design and manufacture the display panel with the built-in touch sensor due to the nature of the display panel, which requires providing self-emissive capability and light transmittance. The inventors of this invention have invented a transparent touch display device comprising a display panel with a built-in touch sensor capable of accurate touch sensing and possessing excellent self-emissive performance and high transmittance.

[0008] According to an embodiment of the present invention, a transparent touch display device may be provided, comprising a display panel having a built-in touch sensor capable of precise touch sensing and having excellent self-illumination performance and high transmittance.

[0009] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor on a cathode electrode layer through a cathode segmentation.

[0010] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor built into the display panel and does not affect the transmittance of the display panel.

[0011] According to embodiments of the present invention, a transparent touch display device can be provided, which can thin the display panel and reduce the complexity of the panel manufacturing process.

[0012] According to an embodiment of the present invention, a transparent touch display device can be provided, which can minimize the impact of the driving of the light-emitting element on touch sensing when the light-emitting element and the touch sensor are placed in the display panel.

[0013] According to an embodiment of the present invention, a transparent touch display device can be provided, which can reduce or prevent parasitic capacitance in touch lines arranged in a display panel.

[0014] A transparent touch display device according to an embodiment of the present invention may include a display cathode and a touch cathode divided by a cathode electrode layer, and may include touch lines overlapping the touch cathode.

[0015] A transparent touch display device according to an embodiment of the present invention may include touch lines disposed in a metal layer at the position furthest from the anode of the light-emitting element.

[0016] A transparent touch display device according to an embodiment of the present invention may include: a substrate, the substrate including a pixel region, a first transmissive region located on a first side of the pixel region, and a second transmissive region located on a second side of the pixel region; a driving transistor disposed in the pixel region; an anode disposed in the pixel region, the anode being located on the driving transistor and electrically connected to the source or drain of the driving transistor; a light-emitting layer disposed on the anode; a display cathode disposed on the light-emitting layer; a first touch cathode disposed in the first transmissive region and located on a first side of the display cathode; a second touch cathode disposed in the second transmissive region and located on a second side of the display cathode; an encapsulation layer disposed on the display cathode, the first touch cathode, and the second touch cathode; and a first touch line overlapping the first touch cathode.

[0017] In a transparent touch display device according to an embodiment of the present invention, the display cathode may include the same material as the first touch cathode and the second touch cathode, and may be electrically separable from the first touch cathode and the second touch cathode.

[0018] In a transparent touch display device according to an embodiment of the present invention, the first touch line may be electrically connected to the first touch cathode or the second touch cathode.

[0019] The transparent touch display device according to an embodiment of the present invention may further include a first touch bridge that electrically connects the first touch cathode and the second touch cathode across the pixel region.

[0020] In a transparent touch display device according to an embodiment of the present invention, the first touch line may be disposed in a metal layer closest to the substrate.

[0021] In a transparent touch display device according to an embodiment of the present invention, the first touch bridge may intersect with the first touch line.

[0022] In a transparent touch display device according to an embodiment of the present invention, the first touch line may be electrically connected to the first touch bridge.

[0023] A transparent touch display device according to an embodiment of the present invention may include: a substrate, the substrate including a pixel region, a first transmissive region located on a first side of the pixel region, and a second transmissive region located on a second side of the pixel region; a display cathode to which a base voltage for display driving is applied; a first touch cathode located on the first side of the display cathode and comprising the same material as the display cathode; a second touch cathode located on the second side of the display cathode and comprising the same material as the display cathode; a first touch bridge electrically connecting the first touch cathode and the second touch cathode across the pixel region; and a first touch line intersecting the first touch bridge and overlapping the first touch cathode.

[0024] According to an embodiment of the present invention, a transparent touch display device may be provided, comprising a display panel having a built-in touch sensor capable of precise touch sensing and having excellent self-illumination performance and high transmittance.

[0025] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor on a cathode electrode layer through a cathode segmentation.

[0026] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor built into the display panel and does not affect the transmittance of the display panel.

[0027] According to embodiments of the present invention, a transparent touch display device can be provided, which can thin the display panel and reduce the complexity of the panel manufacturing process.

[0028] According to an embodiment of the present invention, a transparent touch display device can be provided, which, when placing the light-emitting element and the touch sensor in the display panel, can minimize the impact of the driving of the light-emitting element on touch sensing by placing the touch line in a metal layer at the position furthest from the anode of the light-emitting element.

[0029] According to an embodiment of the present invention, a transparent touch display device can be provided, which can reduce or prevent parasitic capacitance in touch lines arranged in a display panel. Attached Figure Description

[0030] The above and other objects, features, and advantages of the invention will become clearer from the following detailed description given in conjunction with the accompanying drawings. In the drawings:

[0031] Figure 1 This is a diagram illustrating the system configuration of a transparent touch display device according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram illustrating the structure of the display panel of a transparent touch display device according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram illustrating the touch sensor structure of a transparent touch display device according to an embodiment of the present invention;

[0034] Figure 4 This is a plan view illustrating the display panel of a transparent touch display device according to an embodiment of the present invention;

[0035] Figure 5 This is a diagram illustrating the cathode segmentation structure of the display panel of a transparent touch display device according to an embodiment of the present invention;

[0036] Figure 6A , 6B 6C is a diagram illustrating the touch sensor structure in the cathode segmentation structure of the display panel of the transparent touch display device according to an embodiment of the present invention;

[0037] Figure 7 and 8 This is a diagram illustrating other cathode segmentation structures of the display panel of the transparent touch display device according to an embodiment of the present invention;

[0038] Figure 9 This is a diagram illustrating the pixel region and the transmissive region in a portion of the display panel of a transparent touch display device according to an embodiment of the present invention;

[0039] Figure 10This is a diagram illustrating the display cathode and touch cathode respectively disposed in the pixel area and the transmissive area of ​​a portion of the display panel of a transparent touch display device according to an embodiment of the present invention;

[0040] Figure 11 This is a plan view illustrating the display panel of a transparent touch display device according to an embodiment of the present invention;

[0041] Figure 12 This is a cross-sectional view illustrating the cathode dividing boundary region in the display panel of a transparent touch display device according to an embodiment of the present invention;

[0042] Figure 13 This is a cross-sectional view illustrating the touch line area in the display panel of a transparent touch display device according to an embodiment of the present invention;

[0043] Figure 14 This is a diagram illustrating the signals applied to the touch cathode and touch lines in the display panel of a transparent touch display device according to an embodiment of the present invention;

[0044] Figure 15 This is a cross-sectional view illustrating the display panel of a transparent touch display device according to an embodiment of the present invention;

[0045] Figure 16 , 17 18 and 19 are plan views illustrating the display panel of a transparent touch display device according to an embodiment of the present invention. Detailed Implementation

[0046] In the following description of examples or embodiments of the invention, reference will be made to the accompanying drawings, which illustrate specific examples or embodiments that can be implemented by way of example. The same reference numerals and symbols may be used in the drawings to refer to the same or similar components, even if they are shown in different drawings. Furthermore, in the following description of examples or embodiments of the invention, detailed descriptions of well-known functions and components involved herein will be omitted when it is determined that such detailed descriptions would obscure the subject matter of some embodiments of the invention. Terms such as “comprising,” “having,” “including,” and “constituting” as used herein are generally intended to allow for the addition of other components, unless these terms are used in conjunction with the term “only.”

[0047] In this document, terms such as “first,” “second,” “A,” “B,” “(A),” or “(B)” may be used to describe elements of the invention. Each of these terms is not used to define the nature, order, sequence, or number of elements, but is only used to distinguish the corresponding element from other elements.

[0048] When referring to the first element and the second element as "connected or combined" or "overlapping," it should be interpreted as meaning that the first element can not only be "directly connected or combined" or "directly contact or overlap" with the second element, but also that a third element can be "inserted" between the first and second elements, or that the first and second elements can be "connected or combined" or "overlapping" with each other via a fourth element. Here, the second element may be included in at least one of two or more elements that are "connected or combined," "in contact," or "overlapping" with each other.

[0049] When using time-relative terms such as “after,” “following,” “next,” “before,” etc., to describe the process or operation of an element or structure, or the flow or steps in an operating method, processing method, or manufacturing method, these terms may be used to describe discontinuous or non-sequential processes or operations, unless the terms “directly” or “immediately following” are used together.

[0050] Furthermore, when referring to any scale, relative size, etc., even without a specific description, it should be assumed that the numerical values ​​of the component or feature or related information (e.g., level, range, etc.) include the range of tolerances or errors that can be caused by various factors (e.g., process factors, internal or external shocks, noise, etc.). In addition, the term "may" fully encompasses all the meanings of the term "can".

[0051] In the following, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0052] Figure 1 This is a diagram illustrating the system configuration of a transparent touch display device 100 according to an embodiment of the present invention.

[0053] Reference Figure 1 The transparent touch display device 100 may include a display panel 110 and a display driving circuit, which are components for displaying images.

[0054] The display driving circuit is a circuit used to drive the display panel 110, and may include a data driving circuit 120, a gate driving circuit 130, and a display controller 140.

[0055] The display panel 110 may include a display area DA in which an image is displayed and a non-display area NDA in which no image is displayed. The non-display area NDA may be an outer area of ​​the display area DA, and may be referred to as a border area.

[0056] The display panel 110 may include a plurality of sub-pixels SP. The display panel 110 may further include various signal lines for driving the plurality of sub-pixels SP.

[0057] The various signal lines may include multiple data lines for transmitting data signals (also known as data voltages or image signals) and multiple gate lines for transmitting gate signals (also known as scan signals). The multiple data lines and multiple gate lines may intersect each other. Each of the multiple data lines may be arranged while extending along a first direction. Each of the multiple gate lines may be arranged while extending along a second direction. Here, the first direction may be a column direction, and the second direction may be a row direction. Optionally, the first direction may be a row direction, and the second direction may be a column direction.

[0058] The transparent touch display device 100 according to an embodiment of the present invention may be a liquid crystal display device or a self-emissive display device in which the display panel 110 emits its own light. When the transparent touch display device 100 according to an embodiment of the present invention is a self-emissive display device, each of the plurality of sub-pixels SP may include a light-emitting element.

[0059] For example, the transparent touch display device 100 according to an embodiment of the present invention may be an organic light-emitting display device in which the light-emitting element is implemented as an organic light-emitting diode (OLED). As another example, the transparent touch display device 100 according to an embodiment of the present invention may be an inorganic light-emitting display device in which the light-emitting element is implemented as a light-emitting diode based on an inorganic material. As yet another example, the transparent touch display device 100 according to an embodiment of the present invention may be a quantum dot display device in which the light-emitting element is implemented as a quantum dot, which is a self-emissive semiconductor crystal.

[0060] The structure of each of the plurality of sub-pixels SP can vary depending on the type of the transparent touch display device 100. For example, when the transparent touch display device 100 is a self-emissive display device in which the sub-pixels SP emit their own light, each sub-pixel SP may include a self-emissive light-emitting element, one or more transistors, and one or more capacitors.

[0061] The data driving circuit 120 is a circuit for driving multiple data lines and providing data signals to the multiple data lines. The gate driving circuit 130 is a circuit for driving multiple gate lines and providing gate signals to the multiple gate lines. The display controller 140 is a device for controlling the data driving circuit 120 and the gate driving circuit 130, and can control the driving timing of the multiple data lines and the driving timing of the multiple gate lines.

[0062] The display controller 140 can provide data drive control signals to the data drive circuit 120 to control the data drive circuit 120, and can provide gate drive control signals to the gate drive circuit 130 to control the gate drive circuit 130.

[0063] The data driving circuit 120 can provide data signals to multiple data lines according to the driving timing control of the display controller 140. The data driving circuit 120 can receive digital image data from the display controller 140, convert the received image data into analog data signals, and output the analog data signals to multiple data lines.

[0064] The gate drive circuit 130 can provide gate signals to multiple gate lines according to the drive timing control of the display controller 140. The gate drive circuit 130 can receive a first gate voltage corresponding to the on-level voltage and a second gate voltage corresponding to the off-level voltage, as well as various gate drive control signals (e.g., start signal and reset signal, etc.), generate gate signals, and provide the generated gate signals to multiple gate lines.

[0065] For example, the data drive circuit 120 may be connected to the display panel 110 using a tape-on-absence (TAB) method, or connected to the bonding pads of the display panel 110 using a chip-on-glass (COG) or chip-on-panel (COP) method, or implemented and connected to the display panel 110 using a chip-on-film (COF) method.

[0066] The gate driving circuit 130 can be connected to the display panel 110 using the TAB method, or to the bonding pads of the display panel 110 using the COG or COP method, or to the display panel 110 using the COF method. Optionally, the gate driving circuit 130 can be formed in the non-display area NDA of the display panel 110, depending on the Gate In-Panel (GIP) type. The gate driving circuit 130 can be disposed on the substrate or connected to the substrate. In other words, the GIP type gate driving circuit 130 can be disposed in the non-display area NDA of the substrate. The COG type or COF type gate driving circuit 130 can be connected to the substrate.

[0067] Meanwhile, at least one of the data driving circuit 120 and the gate driving circuit 130 may be disposed in the display area DA of the display panel 110. For example, at least one of the data driving circuit 120 and the gate driving circuit 130 may be configured not to overlap with the sub-pixel SP or to overlap with all or some of the sub-pixel SP.

[0068] The data driving circuit 120 may be connected to one side of the display panel 110 (e.g., the top or bottom side). Depending on the driving mechanism or panel design mechanism, the data driving circuit 120 may be connected to both sides of the display panel 110 (e.g., the top and bottom sides), or two or more of the four sides of the display panel 110.

[0069] The gate drive circuit 130 may be connected to one side of the display panel 110 (e.g., the left or right side). Depending on the drive mechanism or panel design mechanism, the gate drive circuit 130 may be connected to both sides of the display panel 110 (e.g., the left and right sides), or two or more of the four sides of the display panel 110.

[0070] The display controller 140 may be implemented as a separate component from the data drive circuit 120, or the display controller 140 and the data drive circuit 120 may be integrated into a single integrated circuit (IC).

[0071] The display controller 140 may be a timing controller used in general display technology, a control device capable of performing other control functions besides the functions of a timing controller, or a control device other than a timing controller, or it may be a circuit in a control device. The display controller 140 may be implemented as various circuits or electronic components, such as integrated circuits (ICs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), or processors.

[0072] The display controller 140 can be mounted on a printed circuit board or flexible printed circuit, and can be electrically connected to the data drive circuit 120 and the gate drive circuit 130 via the printed circuit board or flexible printed circuit.

[0073] The display controller 140 can send / receive signals to / from the data drive circuit 120 via one or more predetermined interfaces. Such interfaces may include, for example, a low-voltage differential signaling (LVDS) interface, an EPI interface, and a serial peripheral interface (SP).

[0074] In addition to image display function, to further provide touch sensing function, the transparent touch display device 100 according to the present invention may include a touch sensor and a touch sensing circuit 150. The touch sensing circuit 150 detects whether a touch object such as a finger or pen is touched by sensing the touch sensor, or detects the touch position.

[0075] The touch sensing circuit 150 may include: a touch driving circuit 160, which drives and senses the touch sensor and generates and outputs touch sensing data; and a touch controller 170, which can use the touch sensing data to detect whether a touch has occurred or to detect the touch location.

[0076] The touch sensor may include multiple touch electrodes. The touch sensor may further include multiple touch lines for electrically connecting the multiple touch electrodes to the touch driving circuitry 160. The touch sensor is also referred to as a touch panel.

[0077] In the case of the transparent touch display device 100 according to an embodiment of the present invention, the touch sensor may be located inside the display panel 110. In this case, the touch sensor is referred to as an in-cell touch sensor. During the manufacturing process of the display panel 110, the in-cell touch sensor may be formed together with the electrodes or signal lines related to display driving.

[0078] The touch driving circuit 160 can provide a touch driving signal to at least one of a plurality of touch electrodes included in the touch sensor, and can sense at least one of the plurality of touch electrodes to generate touch sensing data.

[0079] The touch sensing circuit 150 can perform touch sensing using a self-capacitance sensing mechanism or a mutual capacitance sensing mechanism.

[0080] When the touch sensing circuit 150 performs touch sensing using a self-capacitance sensing mechanism, it can perform touch sensing based on the capacitance between each touch electrode and the touch object (e.g., a finger or pen). According to the self-capacitance sensing mechanism, each of the plurality of touch electrodes can be used both as a driving touch electrode and as a sensing touch electrode. The touch driving circuit 160 can drive all or some of the plurality of touch electrodes and sense all or some of the plurality of touch electrodes.

[0081] When the touch sensing circuit 150 performs touch sensing using a mutual capacitance sensing mechanism, it can perform touch sensing based on the capacitance between the touch electrodes. According to the mutual capacitance sensing mechanism, the multiple touch electrodes are divided into driving touch electrodes and sensing touch electrodes. The touch driving circuit 160 can drive the driving touch electrodes and sense the sensing touch electrodes.

[0082] As described above, the touch sensing circuit 150 can perform touch sensing using a self-capacitance sensing mechanism and / or a mutual capacitance sensing mechanism. However, for ease of description, it is assumed that the touch sensing circuit 150 performs touch sensing using a self-capacitance sensing mechanism.

[0083] Each of the touch driver circuit 160 and the touch controller 170 may be implemented as a separate integrated circuit. Alternatively, the touch driver circuit 160 and the touch controller 170 may be integrated together.

[0084] Each of the touch driving circuit 160 and the data driving circuit 120 can be implemented as a separate integrated circuit. The touch driving circuit 160 and the data driving circuit 120 can also be integrated together. For example, in the case where the transparent touch display device 100 includes a single driving integrated circuit chip, this single driving integrated circuit chip may include both the touch driving circuit 160 and the data driving circuit 120. As another example, when the transparent touch display device 100 includes multiple driving integrated circuit chips, each of the multiple driving integrated circuit chips may include a portion of the touch driving circuit 160 and a portion of the data driving circuit 120.

[0085] The transparent touch display device 100 may further include a power supply circuit for providing various powers to the display driver integrated circuit and / or touch sensing circuit.

[0086] The transparent touch display device 100 according to an embodiment of the present invention can be a mobile terminal such as a smartphone or tablet, or a monitor or television (TV) of various sizes, but is not limited thereto, and can be a display of various types and sizes capable of displaying information or images.

[0087] Figure 2 This is a schematic diagram illustrating the structure of the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0088] Each of a plurality of sub-pixels SP arranged in the display area DA of the display panel 110 of the transparent touch display device 100 may include a light-emitting element ED, a driving transistor DRT for driving the light-emitting element ED, a scanning transistor SCT for transmitting a data voltage Vdata to a first node N1 of the driving transistor DRT, and a storage capacitor Cst for maintaining a constant voltage during a frame.

[0089] A driving transistor DRT may include: a first node N1 to which a data voltage can be applied, a second node N2 electrically connected to a light-emitting element ED, and a third node N3 to which a driving voltage EVDD from a driving voltage line DVL is applied. In the driving transistor DRT, the first node N1 may be a gate node, the second node N2 may be a source node or a drain node, and the third node N3 may be a drain node or a source node. Hereinafter, for ease of description, the first node N1 of the driving transistor DRT may also be referred to as the gate node or gate, the second node N2 of the driving transistor DRT may also be referred to as the source node or source, and the third node N3 of the driving transistor DRT may also be referred to as the drain node or drain.

[0090] The light-emitting element (ED) may include an anode (AE), a light-emitting layer (EL), and a cathode (CE). The anode (AE) of the ED may be electrically connected to the second node N2 of the driving transistor (DRT) of each sub-pixel (SP). The cathode (CE) of the ED may be electrically connected to the base voltage line BVL to which the base voltage (EVSS) is applied.

[0091] The anode AE ​​can be a pixel electrode located in each sub-pixel SP. The cathode CE can be a common electrode to which a base voltage EVSS (a common voltage required to drive the sub-pixels SP) is applied.

[0092] For example, the light-emitting element ED can be an organic light-emitting diode (OLED), an inorganic light-emitting diode, or a quantum dot light-emitting element. When the light-emitting element ED is an organic light-emitting diode (OLED), the light-emitting layer EL of the light-emitting element ED may include an organic light-emitting layer containing organic materials.

[0093] The scanning transistor SCT can be controlled to be turned on / off by the scanning signal SCAN (i.e., the gate signal) applied via the scanning signal line SCL, and is electrically connected between the first node N1 of the driving transistor DRT and the data line DL.

[0094] The storage capacitor Cst can be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT.

[0095] Reference Figure 2 Each of the plurality of sub-pixels SP disposed in the display area DA of the display panel 110 of the transparent touch display device 100 may substantially include a light-emitting element ED, two transistors DRT and SCT and a capacitor Cst.

[0096] Each of the plurality of sub-pixels SP disposed in the display area DA of the display panel 110 of the transparent touch display device 100 may further include one or more transistors or one or more capacitors.

[0097] For example, such as Figure 2 As shown, each sub-pixel SP may further include a sensing transistor SENT for controlling the connection between the second node N2 of the driving transistor DRT and the reference voltage line RVL. The reference voltage line RVL is a signal line used to provide a reference voltage Vref to the sub-pixel SP.

[0098] like Figure 2 As shown, the gate node of the sensing transistor SENT can be electrically connected to the gate node of the scanning transistor SCT. In other words, the scan signal line SCL, which is electrically connected to the gate node of the scanning transistor SCT, can also be electrically connected to the gate node of the sensing transistor SENT.

[0099] Optionally, the gate node of the sensing transistor SENT may be electrically connected to a sensing signal line other than the scan signal line SCL connected to the gate node of the scanning transistor SCT.

[0100] The storage capacitor Cst can be an external capacitor intentionally designed outside the driving transistor DRT, rather than a parasitic capacitor (e.g., Cgs or Cgd) that may exist as an internal capacitor between the first node N1 and the second node N2 of the driving transistor DRT.

[0101] Each of the driving transistor DRT, scanning transistor SCT, and sensing transistor SENT can be an n-type transistor or a p-type transistor.

[0102] Since the circuit elements (especially the light-emitting elements ED) in each sub-pixel SP are susceptible to external moisture or oxygen, the display panel 110 may include an encapsulation layer ENCAP to prevent external moisture or oxygen from penetrating into the circuit elements (especially the light-emitting elements ED).

[0103] The encapsulation layer ENCAP can be constructed in various types.

[0104] For example, the encapsulation layer ENCAP can be configured to cover the light-emitting element ED. The encapsulation layer ENCAP may include one or more inorganic layers and one or more organic layers.

[0105] As another example, the encapsulation layer ENCAP may include an encapsulation substrate, a dam disposed between the thin-film transistor array substrate and the encapsulation substrate along the outer edge of the display area DA, and filler material filling the internal space of the dam.

[0106] Figure 3 This is a schematic diagram illustrating the touch sensor structure of a transparent touch display device 100 according to an embodiment of the present invention.

[0107] Reference Figure 3 According to an embodiment of the present invention, the transparent touch display device 100 may include a touch sensor disposed in the touch sensing area TSA of the display panel 110.

[0108] The touch sensor included in the transparent touch display device 100 according to an embodiment of the present invention may include a plurality of touch electrodes TE disposed in the touch sensing area TSA.

[0109] The touch sensor included in the transparent touch display device 100 according to an embodiment of the present invention may further include multiple touch lines TL for electrically connecting multiple touch electrodes TE to multiple touch pads TP electrically connected to the touch driving circuit 160. The multiple touch lines TL are also referred to as multiple touch wirings.

[0110] When the touch sensor included in the transparent touch display device 100 according to an embodiment of the present invention is of the self-capacitance sensing type, the plurality of touch electrodes TE do not electrically overlap each other, nor do they cross each other. In the self-capacitance type touch sensor structure, each of the plurality of touch electrodes TE can be a touch node corresponding to touch coordinates.

[0111] When the transparent touch display device 100 according to an embodiment of the present invention senses touch based on self-capacitance, the touch driving circuit 160 can provide a touch driving signal to at least one of a plurality of touch electrodes TE and can sense the touch electrode TE to which the touch driving signal has been provided.

[0112] Each of the multiple touch electrodes TE can be an electrode without openings or a mesh-type electrode with multiple openings. Each of the multiple touch electrodes TE can be a transparent electrode.

[0113] The sensed value of the touch electrode TE, which is provided with a touch drive signal, can be a value corresponding to the capacitance or capacitance change in the touch electrode TE. The capacitance in the touch electrode TE, which is provided with a touch drive signal, can be the capacitance between the touch electrode TE and a touch indicator such as a finger.

[0114] As described above, in the transparent touch display device 100 according to an embodiment of the present invention, a touch sensor including a plurality of touch electrodes TE can be built into the display panel 110. Therefore, during the manufacturing process of the display panel 110, when forming electrodes, lines and patterns related to display driving, touch electrodes TE and touch lines TL can also be formed.

[0115] Figure 4 This is a plan view illustrating the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0116] Reference Figure 4 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may include a cathode electrode region CA that overlaps with the display region DA and in which a cathode CE is disposed.

[0117] The cathode electrode region CA may have the same area (size) as the display region DA. In this case, the cathode electrode region CA may overlap with the entire display region DA. Alternatively, as... Figure 4 As shown, the cathode electrode region CA may have a larger area (size) than the display region DA. In this case, the cathode electrode region CA may include the area overlapping with the entire display region DA and the area overlapping with the non-display region NDA.

[0118] In the following, in the transparent touch display device 100 according to an embodiment of the present invention, the cathode CE to which the base voltage EVSS is applied is referred to as the display cathode.

[0119] The transparent touch display device 100 according to an embodiment of the present invention may include one or more display cathodes. The one or more touch cathodes may be disposed together with the one or more display cathodes in a cathode electrode layer in which the display cathodes are disposed.

[0120] In other words, the transparent touch display device 100 according to an embodiment of the present invention may include one or more display cathodes and one or more touch cathodes. The one or more display cathodes and one or more touch cathodes may be disposed together in the cathode electrode region CA and together in the cathode electrode layer.

[0121] In the transparent touch display device 100 according to an embodiment of the present invention, one or more display cathodes and one or more touch cathodes shall be electrically isolated from each other.

[0122] In the transparent touch display device 100 according to an embodiment of the present invention, one or more display cathodes are the cathodes CE of the light-emitting elements ED of a plurality of sub-pixels SP, and a base voltage EVSS can be applied to one or more display cathodes.

[0123] In the transparent touch display device 100 according to an embodiment of the present invention, one or more touch cathodes may be used as touch sensors.

[0124] In the transparent touch display device 100 according to an embodiment of the present invention, the cathode division structure may include a first type, a second type, and a third type.

[0125] In the transparent touch display device 100 according to an embodiment of the present invention, the first type is a type in which the cathode electrode layer is divided into one display cathode and multiple touch cathodes. The second type is a type in which the cathode electrode layer is divided into one touch cathode and multiple display cathodes. The third type is a type in which the cathode electrode layer is divided into multiple display cathodes and multiple touch cathodes.

[0126] The following text will refer to Figure 5 , 7 8 describes the first type, the second type, and the third type in more detail, respectively.

[0127] Figure 5 The diagram illustrates a first type of cathode partition structure of the display panel 110 of a transparent touch display device 100 according to an embodiment of the present invention.

[0128] Reference Figure 5When the transparent touch display device 100 according to an embodiment of the present invention has a first type of cathode segmentation structure, a display cathode (DCE) and a plurality of touch cathodes (TCEs) can be disposed in the cathode electrode layer (CEL). In other words, the display cathode (DCE) and the plurality of touch cathodes (TCEs) can be formed of the same material.

[0129] The lower portion of the lower layer located beneath the cathode electrode layer (CEL) has an inwardly recessed undercut shape, so that when the cathode electrode material is deposited on the lower layer, the cathode electrode material breaks off at the undercut point of the lower layer. The cathode electrode material separated relative to the undercut point corresponds to the display cathode (DCE) and the touch cathode (TCE). For example, the lower layer to which the undercut portion can be applied may include a pixel electrode layer, a coating layer, or a dam in which the anode (AE) is formed.

[0130] One display cathode (DCE) can correspond to the cathodes (CEs) of the light-emitting elements (EDs) of multiple sub-pixels (SPs). A base voltage (EVSS) can be applied to one display cathode (DCE).

[0131] Multiple touch cathodes (TCEs) can be configured to be spaced apart from each other. Multiple touch cathodes (TCEs) can be arranged adjacent to a display cathode (DCE), but can also be arranged separately from the display cathode (DCE). Multiple touch cathodes (TCEs) can be electrically isolated from the display cathode (DCE).

[0132] Reference Figure 5 When the transparent touch display device 100 according to an embodiment of the present invention has a first type of cathode segmentation structure, a display cathode DCE may include multiple openings. Multiple touch cathodes TCE may be configured as islands within the internal space of the multiple openings formed in a single display cathode DCE.

[0133] Reference Figure 5 A display cathode (DCE) or a portion thereof, which serves as a display driving electrode, may be disposed between two adjacent touch cathodes (TCEs) among a plurality of touch cathodes (TCEs).

[0134] Reference Figure 5 One or more sub-pixels SP or their light-emitting areas can be positioned between two adjacent touch cathode TCEs among multiple touch cathode TCEs.

[0135] The area (size) of each of the multiple touch cathodes (TCEs) can be equal to the area (size) of a sub-pixel (SP) or its region.

[0136] Optionally, the area (size) of each of the plurality of touch cathodes TCEs may be larger than the area (size) of a sub-pixel SP or its region. For example, the area (size) of each of the plurality of touch cathodes TCEs may correspond to the area (size) of two or more sub-pixels SP or their regions.

[0137] Figure 6A , 6B Figure 6C illustrates the touch sensor structure in a first type of transparent touch display device 100 with a cathode segmentation structure according to an embodiment of the present invention. However, for ease of description, Figure 6A Only multiple touch cathodes (TCEs) are illustrated; display cathodes (DCEs) are omitted.

[0138] Reference Figure 6A Multiple touch cathodes (TCEs) can be divided into multiple groups. These multiple groups correspond to multiple touch electrodes (TEs). In other words, the transparent touch display device 100 according to an embodiment of the present invention may include multiple touch electrodes (TEs). One touch electrode (TE) may include two or more touch cathodes (TCEs).

[0139] according to Figure 6A For example, display panel 110 may include 12 touch electrodes TE arranged in 3 rows and 4 columns. One touch electrode TE may include 20 touch cathodes TCE arranged in 4 rows and 5 columns. Examples thereof are described below.

[0140] For normal touch sensing operation, 20 touch cathodes (TCEs) need to be electrically connected to each other to function as a single touch electrode (TE).

[0141] For normal touch sensing operation, each of the plurality of touch electrodes TE in the display panel 110 can be electrically isolated from each other. In some cases, some of the plurality of touch electrodes TE can be electrically connected internally within the touch driving circuit 160. This can be used in group driving (or group sensing) that simultaneously senses two or more touch electrodes TE.

[0142] As described above, for normal touch sensing operation, multiple touch electrodes TE need to be electrically isolated from each other in the display panel 110, while each of the multiple touch electrodes TE should be electrically connected to the touch driving circuit 160.

[0143] This connection structure is described from the perspective of the touch cathode TCE. Two or more touch cathode TCEs disposed in the region of one touch electrode TE shall be electrically connected to each other. Two or more touch cathode TCEs disposed in the region of one touch electrode TE and two or more touch cathode TCEs disposed in the region of another touch electrode TE shall be electrically disconnected from each other. Two or more touch cathode TCEs disposed in the region of each touch electrode TE shall be electrically connected to the touch drive circuit 160.

[0144] Figure 6B Only the additional connection structures TL, TB, CP, CNT1, and CNT2, which are disposed in the cathode electrode region CA to form the touch sensor structure, are illustrated. For ease of explanation, in Figure 6B The cathode electrode layer (CEL) is omitted in the text. Figure 6C It's a diagram. Figure 5 Cathode electrode layer CEL and Figure 6B Plan view of the connection structure TL, TB, CP, CNT1, CNT2.

[0145] Reference Figure 6B and 6C In order to form a touch sensor structure according to the above connection structure, the display panel 110 may include multiple touch lines TL and multiple touch bridges TB.

[0146] Reference Figure 6B and 6C Multiple touch lines TL can each correspond to multiple touch electrodes TE. The multiple touch electrodes TE can be connected to the touch driver circuit 160 via multiple touch lines TL.

[0147] Reference Figure 6B and 6C At least one touch bridge TB may be disposed in the area of ​​each of the plurality of touch electrodes TE. In other words, at least one touch bridge TB may be disposed in the area of ​​one touch electrode TE.

[0148] Reference Figure 6B and 6C The following example illustrates the structure of a touch sensor with a touch electrode TE.

[0149] Reference Figure 6B and 6C For example, a touch electrode TE may include 20 touch cathodes TCE, and the 20 touch cathodes TCE are arranged in 4 rows and 5 columns. In other words, a touch electrode TE may include first to fourth rows of touch cathodes. Each first to fourth row of touch cathodes includes 5 touch cathodes TCE.

[0150] Reference Figure 6B and 6C For example, four touch bridges TB are arranged in the area of ​​a touch electrode TE. The four touch bridges TB correspond to the first to fourth touch cathode rows, respectively. The five touch cathodes TCE included in each of the first to fourth touch cathode rows can be electrically connected to each other via a touch bridge TB.

[0151] Reference Figure 6B and 6C For example, multiple touch lines TL can be arranged across an area forming a touch electrode TE. One of the multiple touch lines TL can be electrically connected to the first to fourth touch cathode rows via four first contact holes CNT1.

[0152] Reference Figure 6B and 6CFor example, each of the four touch bridges TB disposed in the area of ​​a touch electrode TE may correspond to five protruding connection patterns CP. A touch bridge TB may be electrically connected to five touch cathodes TCE via the five protruding connection patterns CP.

[0153] Reference Figure 6B and 6C Five protruding connection patterns CP in a touch bridge TB can be connected to five touch cathodes TCE via five second contact holes CNT2 respectively.

[0154] Reference Figure 6B and 6C The first contact hole CNT1 can be the point connecting the touch line TL and the touch bridge TB, and the second contact hole CNT2 can be the point connecting the touch bridge TB and the touch cathode TCE. All 20 touch cathodes TCE can be electrically connected to a touch line TL via 4 first contact holes CNT1 and 20 second contact holes CNT2.

[0155] Figure 7 The diagram illustrates a second type of cathode partition structure for the display panel 110 of a transparent touch display device 100 according to an embodiment of the present invention.

[0156] Reference Figure 7 In the transparent touch display device 100 according to an embodiment of the present invention, the second type is the type in which the cathode electrode layer CEL is divided into a touch cathode TCE and a plurality of display cathodes DCE.

[0157] Reference Figure 7 When the transparent touch display device 100 according to an embodiment of the present invention has a second type of cathode segmentation structure, one touch cathode TCE and multiple display cathodes DCE can be provided. The touch cathode TCE and multiple display cathodes DCE can be formed of the same material (cathode electrode material).

[0158] Multiple display cathodes (DCEs) can correspond to the cathodes (CEs) of the light-emitting elements (EDs) of multiple sub-pixels (SPs). A base voltage (EVSS) can be applied to the multiple display cathodes (DCEs).

[0159] Multiple display cathodes (DCEs) are arranged adjacent to a touch cathode (TCE), but can be arranged separately from the touch cathode (TCE). The multiple display cathodes (DCEs) can be electrically isolated from the touch cathode (TCE).

[0160] Reference Figure 7 When the transparent touch display device 100 according to an embodiment of the present invention has a second type of cathode segmentation structure, a touch cathode may include multiple openings. Multiple display cathodes (DCEs) may be arranged in the form of islands within the internal space of the multiple openings formed in a single touch cathode (TCE).

[0161] Figure 8 The diagram illustrates a third type of cathode partition structure of the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0162] Reference Figure 8 In the transparent touch display device 100 according to an embodiment of the present invention, the third type is the type in which the cathode electrode layer CEL is divided into a plurality of touch cathodes TCE and a plurality of display cathodes DCE.

[0163] Reference Figure 8 When the transparent touch display device 100 according to an embodiment of the present invention has a third type of cathode segmentation structure, a plurality of touch cathodes TCE and a plurality of display cathodes DCE can be alternately arranged.

[0164] Reference Figure 8 Each of the multiple touch cathodes (TCEs) and multiple display cathodes (DCEs) may have a bar shape. The multiple touch cathodes (TCEs) and multiple display cathodes (DCEs) may be formed from the same material (cathode electrode material).

[0165] Multiple display cathodes (DCEs) can correspond to the cathodes (CEs) of the light-emitting elements (EDs) of multiple sub-pixels (SPs). A base voltage (EVSS) can be applied to the multiple display cathodes (DCEs).

[0166] Each of the plurality of display cathodes (DCEs) is adjacent to a touch cathode (TCE) located on opposite sides of the respective display cathode (DCE), but should be separated from the touch cathode (TCE). In other words, the plurality of display cathodes (DCEs) can be electrically isolated from the plurality of touch cathodes (TCEs).

[0167] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 5 In the first type of cathode segmentation structure, since a single display cathode (DCE) is used for display driving, the base voltage (EVSS), which serves as a common voltage, can be uniformly supplied to all sub-pixels (SP). This improves image quality.

[0168] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 7 In the second type of cathode segmentation structure, since a touch cathode TCE is used for touch driving, the touch bridge TB does not need to be set in the display panel 110. Therefore, the structure of the display panel 110 can be simplified.

[0169] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 8 In the third type of cathode segmentation structure, the undercut process can be simplified because the boundary between the touch cathode TCE and the display cathode DCE is a straight line.

[0170] Figure 9 The diagram illustrates a pixel region PA and transmissive regions TA1 and TA2 in a portion of the display panel 110 of a transparent touch display device 100 according to an embodiment of the present invention.

[0171] Reference Figure 9 A portion of the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention may include a pixel region PA, a first transmissive region TA1, and a second transmissive region TA2.

[0172] Reference Figure 9 The first transmission region TA1 may be located on the first side of the pixel region PA, and the second transmission region TA2 may be located on the second side of the pixel region PA.

[0173] Reference Figure 9 Two or more sub-pixels SP1, SP2, SP3, SP4 can be set in the pixel region PA between the first transmission region TA1 and the second transmission region TA2.

[0174] according to Figure 9 For example, four sub-pixels SP1, SP2, SP3, and SP4 can be disposed in the pixel region PA between the first transmission region TA1 and the second transmission region TA2. The four sub-pixels SP1, SP2, SP3, and SP4 may include a sub-pixel that emits red light, a sub-pixel that emits green light, a sub-pixel that emits blue light, and a sub-pixel that emits white light.

[0175] Figure 10 The diagram illustrates the display cathode DCE and touch cathodes TCE1 and TCE2 respectively disposed in a pixel region PA and a transmission region TA1 and TA2 in a portion of a display panel 110 of a transparent touch display device 100 according to an embodiment of the present invention.

[0176] Reference Figure 10 The display cathode DCE, to which the base voltage EVSS for display driving is applied, can be disposed in the pixel region PA. The first touch cathode TCE1 can be disposed in the first transmission region TA1, and the second touch cathode TCE2 can be disposed in the second transmission region TA2.

[0177] The first touch cathode TCE1 and the second touch cathode TCE2 may have the same shape or the same area.

[0178] One of the first touch cathode TCE1 and the second touch cathode TCE2 may have a different shape or a different area from the other.

[0179] Reference Figure 10As an example, the display cathode DCE may include an electrode protrusion DCE_PRT. ​​In this case, the first touch cathode TCE1 may include an electrode groove TCE_GRV into which the electrode protrusion DCE_PRT of the display cathode DCE is inserted.

[0180] The electrode protrusion DCE_PRT of the display cathode DCE and the electrode groove TCE_GRV of the first touch cathode TCE1 can be electrically separated from each other.

[0181] The electrode protrusion DCE_PRT of the cathode DCE can be set to invade (i.e., extend into) the first transmission region TA1.

[0182] Reference Figure 10 The first side of the cathode DCE can be configured to invade (i.e., extend into) a local area of ​​the first transmission region TA1. The second side of the cathode DCE can be configured to invade (i.e., extend into) a local area of ​​the second transmission region TA2.

[0183] Figure 11 This is a plan view illustrating the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0184] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may include: a display cathode DCE disposed in the pixel region PA, a first touch cathode TCE1 disposed in the first transmission region TA1, and a second touch cathode TCE2 disposed in the second transmission region TA2.

[0185] Reference Figure 11 This shows that the first side of the cathode DCE can be configured to invade a local area of ​​the first transmission region TA1. The second side of the cathode DCE can be configured to invade a local area of ​​the second transmission region TA2.

[0186] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include multiple touch lines TL1, TL2, TL3 overlapping with the first touch cathode TCE1 and multiple touch lines TL4, TL5, TL6 overlapping with the second touch cathode TCE2.

[0187] Reference Figure 11 The first touch cathode TCE1 and the second touch cathode TCE2 can constitute a first touch electrode TE to which touch driving signals are applied simultaneously.

[0188] Reference Figure 11A first touch electrode TE can be electrically connected to the touch pad TP via one of the multiple touch lines TL1, TL2, TL3 that overlap with the first touch cathode TCE1. In other words, the first touch cathode TCE1 and the second touch cathode TCE2 can be electrically connected to the touch pad TP via one of the multiple touch lines TL1, TL2, TL3 that overlap with the first touch cathode TCE1.

[0189] Reference Figure 11 Of the multiple touch lines TL1, TL2, and TL3 that overlap with the first touch cathode TCE1, the remaining touch lines TL2 and TL3, other than the first touch line TL1, are not electrically connected to the first touch cathode TCE1. Instead, they can be electrically connected to another touch cathode TCE that is electrically separated from the first touch cathode TCE1 and the second touch cathode TCE2.

[0190] Reference Figure 11 The multiple touch lines TL4, TL5, and TL6 that overlap with the second touch cathode TCE2 are not electrically connected to the second touch cathode TCE2. Instead, the multiple touch lines TL4, TL5, and TL6 can be electrically connected to another touch cathode TCE that is electrically separated from the first touch cathode TCE1 and the second touch cathode TCE2.

[0191] The display cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 can be cathode electrode materials that are disconnected by an undercut in a lower layer located below the cathode electrode layer CEL. Therefore, the display cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 can be formed from the same cathode electrode material. For example, the cathode electrode material may include a transparent conductive material.

[0192] Reference Figure 11 The first touch line TL1 can be electrically connected to the first touch cathode TCE1 or the second touch cathode TCE2.

[0193] For example, the first touch line TL1 can be electrically connected to the first touch cathode TCE1 via the first touch bridge TB. More specifically, since the first touch line TL1 can be electrically connected to the first touch bridge TB via the first contact hole CNT1, and the protruding connection pattern CP of the first touch bridge TB is electrically connected to the first touch cathode TCE1 via the second contact hole CNT2, the first touch line TL1 can be electrically connected to the first touch cathode TCE1 via the first touch bridge TB.

[0194] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 5In the first type of cathode segmentation structure, the display cathode (DCE) may include multiple openings. A first touch cathode (TCE1) may be disposed within the interior space of a first opening among the multiple openings of the display cathode (DCE), and a second touch cathode (TCE2) may be disposed within the interior space of a second opening among the multiple openings of the display cathode (DCE).

[0195] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 7 In the second type of cathode segmentation structure, the first touch cathode TCE1 and the second touch cathode TCE2 can be corresponding parts of a single touch cathode TCE; the touch cathode TCE can include multiple openings. The display cathode DCE can be disposed within the interior space of one of the multiple openings of the touch cathode TCE.

[0196] When the transparent touch display device 100 according to an embodiment of the present invention has Figure 8 In the third type of cathode segmentation structure, the display cathode DCE can be disposed on the first side of the first touch cathode TCE1; another display cathode DCE can be disposed on the second side of the first touch cathode TCE1 opposite to the first side, and can be disposed separately from the display cathode DCE.

[0197] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a first scan signal line SCL disposed across the first transmissive region TA1, the pixel region PA and the second transmissive region TA2.

[0198] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a first touch bridge TB that electrically connects the first touch cathode TCE1 and the second touch cathode TCE2 across the pixel region PA.

[0199] Reference Figure 11 In the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention, the first touch bridge TB may cross with the first touch line TL1, and the first touch line TL1 may be electrically connected to the first touch bridge TB via the first contact hole CNT1.

[0200] Reference Figure 11 The first touch bridge TB may include a first local bridge TBls having a first metal and a second local bridge TBg having a second metal different from the first metal.

[0201] For example, the first metal can be the same metal as the light-shielding portion located below the driving transistor DRT in the pixel region PA (hereinafter referred to as the light-shielding metal). The second metal can be the gate of the driving transistor DRT or the first scan signal line SCL, or the gate metal of various signal lines. The second metal can be located in a higher layer than the first metal, that is, further away from the substrate.

[0202] Reference Figure 11 The first partial bridge TBls and the second partial bridge TBg that constitute the first touch bridge TB can be located in different layers and can be electrically connected to each other through multiple contact holes C1, C2, C3 and C4.

[0203] Reference Figure 11 The first touch line TL1 may include a first metal, and the first scan signal line SCL may include a second metal. The first touch line TL1 may be located in a layer lower than the first scan signal line SCL.

[0204] The first touch line TL1 can be located in any of the following layers, excluding the layer where the first touch bridge TB is located: a first metal layer (e.g., a light-shielding metal layer) in which electrodes or lines including a first metal are disposed; a second metal layer (e.g., a gate metal layer) in which electrodes or lines including a second metal are disposed; a third metal layer (e.g., a source-drain metal layer) in which electrodes or lines including a third metal are disposed; and a fourth metal layer (e.g., a metal layer located between the third metal layer and the pixel electrode layer (anode electrode layer)) in which electrodes or layers including a fourth metal are disposed. The first, second, third, and fourth metal layers can be arranged from the bottom in the order of the first, second, third, and fourth metal layers. Among the first, second, third, and fourth metal layers, the first metal layer can be the lowest layer closest to the substrate SUB, and the fourth metal layer can be the highest layer furthest from the substrate SUB.

[0205] Reference Figure 11 The first touch line TL1 does not intersect with the first partial bridge TBls of the first touch bridge TB. The first touch line TL1 may intersect with the second partial bridge TBg of the first touch bridge TB.

[0206] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a first data line DL1, a second data line DL2, a third data line DL3 and a fourth data line DL4 disposed in the pixel area PA.

[0207] Reference Figure 11Each of the first data line DL1, the second data line DL2, the third data line DL3, and the fourth data line DL4 may include a third metal different from the first metal and the second metal.

[0208] For example, the first metal can be the same light-shielding metal as the light-shielding portion located below the driving transistor DRT in the pixel region PA. The second metal can be the gate of the driving transistor DRT or the first scan signal line SCL, or the gate metal constituting various signal lines. The third metal can be the source and drain of the driving transistor DRT, or the source-drain metal constituting various signal lines. The third metal layer in which the third metal is disposed can be located in a layer higher than the second metal layer in which the second metal is disposed, and the second metal layer in which the second metal is disposed can be located in a layer higher than the first metal layer in which the first metal is disposed.

[0209] Reference Figure 11 Each of the first data line DL1, the second data line DL2, the third data line DL3, and the fourth data line DL4 can intersect with the first partial bridge TBls or the second partial bridge TBg of the first touch bridge TB.

[0210] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a reference voltage line RVL disposed in the pixel region PA.

[0211] The reference voltage line RVL can be located at the center of the pixel region PA (in the column direction). The reference voltage line RVL can overlap with the display cathode DCE and can be located at the center of the display cathode DCE (in the column direction).

[0212] The reference voltage line RVL may include a first metal, and the reference voltage line RVL may cross a second local bridge TBg of the first touch bridge TB.

[0213] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a base voltage line BVL disposed in the pixel region PA and overlapping with the display cathode DCE.

[0214] Reference Figure 11 The base voltage line BVL may include a first local base voltage line BVLg having a second metal, and a second local base voltage line BVLs having a third metal different from the first metal and the second metal.

[0215] Reference Figure 11The second local base voltage line BVLs may include a double-layer portion that overlaps with the first local base voltage line BVLg and a single-layer portion that does not overlap with the first local base voltage line BVLg.

[0216] Reference Figure 11 The first local base voltage line BVLg may overlap with the first local bridge TBls of the first touch bridge TB. The double-layer portion of the second local base voltage line BVLs may overlap with the first local bridge TBls of the first touch bridge TB.

[0217] Reference Figure 11 The first local base voltage line BVLg does not intersect with the first scan signal line SCL, while the second local base voltage line BVLs may intersect with the first scan signal line SCL.

[0218] Reference Figure 11 The base voltage line BVL can be positioned between the first side edge of the display cathode DCE and the reference voltage line RVL.

[0219] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a driving voltage line DVL disposed in the pixel region PA and overlapping with the display cathode DCE.

[0220] Reference Figure 11 The driving voltage line DVL may include a first local driving voltage line DVLg having a second metal, and a second local driving voltage line DVLs having a third metal different from the first metal and the second metal.

[0221] Reference Figure 11 The second local driving voltage line DVLs may include a double-layer portion that overlaps with the first local driving voltage line DVLg and a single-layer portion that does not overlap with the first local driving voltage line DVLg.

[0222] Reference Figure 11 The first local driving voltage line DVLg can overlap with the first local bridge TBls of the first touch bridge TB. The double-layer portion of the second local driving voltage line DVLs can overlap with the first local bridge TBls of the first touch bridge TB.

[0223] However, the first local driving voltage line DVLg does not overlap with the second local bridge TBg of the first touch bridge TB, and the double-layer portion of the second local driving voltage line DVLs does not overlap with the second local bridge TBg of the first touch bridge TB.

[0224] Reference Figure 11 The driving voltage line DVL can be positioned between the second side edge of the display cathode DCE and the reference voltage line RVL.

[0225] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a base voltage line BVL disposed in the pixel region PA, overlapping with the display cathode DCE, and electrically connected to the display cathode DCE.

[0226] Reference Figure 11 The display cathode DCE may include an electrode protrusion DCE_PRT. ​​The first touch cathode TCE1 may include an electrode groove TCE_GRV into which the electrode protrusion DCE_PRT of the display cathode DCE is inserted. The electrode protrusion DCE_PRT of the display cathode DCE and the electrode groove TCE_GRV of the first touch cathode TCE1 may be electrically separable from each other.

[0227] Reference Figure 11 The base voltage line BVL may include line protrusions BVLs_PRT that overlap with the electrode protrusions DCE_PRT of the display cathode DCE. The line protrusions BVLs_PRT of the base voltage line BVL may be electrically connected to the electrode protrusions DCE_PRT of the display cathode DCE via the display cathode contact pattern CNT_DCE.

[0228] Reference Figure 11 The first touch line TL1 can overlap with the first touch cathode TCE1 and can bend along the electrode groove TCE_GRV of the first touch cathode TCE1.

[0229] Reference Figure 11 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include other touch lines LT4, LT5, and LT6 disposed in the second transmission region TA2, which intersect with the first touch bridge TB and overlap with the second touch cathode TCE2.

[0230] Figure 12 This is an illustration of the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention. Figure 11 A cross-sectional view of the cathode partition boundary region BA.

[0231] When the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention has a cathode segmentation structure, the display cathode DCE, the first touch cathode TCE1 and the second touch cathode TCE2 can be cathode electrode materials that are cut off by the undercut portion of the lower layer located below the cathode electrode layer CEL.

[0232] For example, the lower layer to which the undercut can be applied may include a pixel electrode layer, a coating layer or a dam in which an anode AE ​​is formed, and in some cases may include at least one of a first passivation film PAS1, a second passivation film PAS2 and an interlayer insulating film ILD.

[0233] Based on the aforementioned undercut structure of the lower layer, it can be seen that the cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 can be formed from the same cathode electrode material. For example, the cathode electrode material may include a transparent conductive material.

[0234] In other words, such as Figure 12 As shown, in Figure 11 In the cathode segmentation boundary region BA shown, the lower layer located below the display cathode DCE may have an undercut shape, wherein the lower portion is recessed inward. The cathode segmentation boundary region BA may be the boundary region BA located between the display cathode DCE and the first touch cathode TCE1.

[0235] Similarly, even in the boundary region between the display cathode DCE and the second touch cathode TCE2, the lower layer below the display cathode DCE can have an undercut shape, in which the lower portion is recessed inward.

[0236] In other words, when the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention has a cathode segmentation structure, the display panel 110 may further include a lower layer located below the display cathode DCE.

[0237] The lower layer may have an undercut structure, with its lower portion recessed inward. At point BA where the lower layer has an undercut structure, it is shown that the cathode DCE and the first touch cathode TCE1 can be electrically separated from each other, and at another point where the lower layer has an undercut structure, it is shown that the cathode DCE and the second touch cathode TCE2 can be electrically separated from each other.

[0238] Figure 13 This is a cross-sectional view illustrating the touch line area TLA in the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0239] Reference Figure 13 The first touch cathode TCE1 and the second touch cathode TCE2 can be electrically connected through the first touch bridge TB, thereby forming a first touch electrode TE.

[0240] Reference Figure 13 In the first transmission region TA1, the first touch line TL1, the second touch line TL2 and the third touch line TL3 can overlap with the first touch cathode TCE1.

[0241] Refer to together Figure 13 and 11Of the first touch line TL1, the second touch line TL2, and the third touch line TL3 that overlap with the first touch cathode TCE1, only the first touch line TL1 can be electrically connected to the first touch cathode TCE1. Of the first touch line TL1, the second touch line TL2, and the third touch line TL3 that overlap with the first touch cathode TCE1, the second touch line TL2 and the third touch line TL3 can be not electrically connected to the first touch cathode TCE1.

[0242] Reference Figure 13 The first touch line TL1, the second touch line TL2, and the third touch line TL3 can be located on the light-shielding metal layer on the substrate SUB, and the buffer layer BUF can be configured to cover the first touch line TL1, the second touch line TL2, and the third touch line TL3. The buffer layer BUF can be a single layer or multiple layers.

[0243] Reference Figure 13 The gate insulating film GI can be disposed on the buffer layer BUF, and the passivation film PAS can be disposed on the gate insulating film GI. The passivation film PAS can be a single film or multiple films. The coating layer OC can be disposed on the passivation film PAS, or the embankment BK can be further disposed on the coating layer OC.

[0244] Reference Figure 13 The light-emitting layer EL can be disposed on the coating layer OC or on the embankment BK of the coating layer OC. The first touch cathode TCE1 can be located on the light-emitting layer EL.

[0245] Reference Figure 13 The light-emitting layer EL, which overlaps with the first touch line TL1, the second touch line TL2 and the third touch line TL3, extends from the pixel area PA. Since there is no anode AE ​​below it, the light-emitting layer EL cannot perform the light-emitting function.

[0246] Figure 14 The diagram illustrates signals applied to a first touch cathode TCE1 and first touch lines TL1, TL2, and TL3 in the display panel 110 of a transparent touch display device 100 according to an embodiment of the present invention.

[0247] Reference Figure 14 The first touch line TL1 and the first touch cathode TCE1 may have the same electrical state. In addition, the second touch line TL2 and the third touch line TL3 may also have the same electrical state as the first touch cathode TCE1.

[0248] The reason is as follows: In the first transmission region TA1, the first touch line TL1, the second touch line TL2, and the third touch line TL3 overlap with the first touch cathode TCE1, and signals with the same signal characteristics are applied to all of the first touch line TL1, the second touch line TL2, the third touch line TL3, and the first touch cathode TCE1. Same signal characteristics can mean that at least one of the following is the same: frequency, phase, and amplitude.

[0249] Specifically, since the touch drive signal output from the touch drive circuit 160 is applied to the first touch cathode TCE1 via the first touch line TL1, the first touch line TL1 and the first touch cathode TCE1 can have the same electrical state. A touch drive signal for touch sensing, or a no-load drive signal corresponding to the touch drive signal for reducing parasitic capacitance, can be applied to the second touch line TL2 and the third touch line TL3. The no-load drive signal can have the same signal characteristics as the touch drive signal. Same signal characteristics can mean that at least one of the following is the same: frequency, phase, and amplitude. Therefore, all of the first touch line TL1, the second touch line TL2, the third touch line TL3, and the first touch cathode TCE1 can have the electrical state generated by applying a signal with the same signal characteristics.

[0250] Reference Figure 14 Since the first touch line TL1 and the first touch cathode TCE1 have the same electrical state, unnecessary parasitic capacitance between the first touch line TL1 and the first touch cathode TCE1 can be prevented, thereby improving touch sensitivity.

[0251] Figure 15 This is a cross-sectional view illustrating the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention. For ease of description, Figure 15 A brief cross-sectional view of a portion of the pixel region PA and the first transmission region TA1 is illustrated. For ease of explanation, Figure 15 The diagram illustrates only the first touch line TL1, which is one of the first touch line TL1, the second touch line TL2, and the third touch line TL3 that overlap with the first touch cathode TCE1.

[0252] Reference Figure 15 The driving transistor DRT, anode AE, and display cathode DCE can be disposed in the pixel area PA. The first touch cathode TCE1, first touch line TL1, and first touch bridge TB can be disposed in the first transmission area TA1.

[0253] Reference Figure 15The anode AE ​​can be located in the pixel electrode layer (anode electrode layer) in the pixel region PA, and can be situated on the driving transistor DRT, and can be electrically connected to the source S or drain D of the driving transistor DRT. The light-emitting layer EL can be located between the anode AE ​​and the display cathode DCE.

[0254] Reference Figure 15 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may further include a light shielding portion LS, which is located below the driving transistor DRT and overlaps with the active layer ACT of the driving transistor DRT. The layer where the light shielding portion LS is located may be referred to as a light shielding metal layer.

[0255] The light shielding element LS can be set in the pixel area PA.

[0256] The first touch line TL1, which overlaps with the first touch cathode TCE1, may be located within the light-shielding metal layer. Therefore, the light-shielding portion LS and the first touch line TL1 may comprise the same material (light-shielding metal).

[0257] Figure 15 The diagram illustrates that the first touch line TL1 is located in the first metal layer (light-shielding metal layer), but it can also be located in various layers. For example, the first touch line TL1 can be located in any metal layer other than the layer where the first touch bridge TB is located, including the first metal layer (light-shielding metal layer), the second metal layer (gate metal layer), the third metal layer (source-drain metal layer), and the fourth metal layer (the metal layer located between the third metal layer and the pixel electrode layer (anode electrode layer)).

[0258] Reference Figure 15 According to an embodiment of the present invention, the display panel 110 of the transparent touch display device 100 may have a top-emitting structure, wherein light for image display is emitted onto the upper surface of the encapsulation substrate ENCAP_SUB. For this purpose, the display cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 may comprise the same transparent conductive material, and the anode AE ​​may comprise a reflective metallic material.

[0259] Reference Figure 15 The vertical structure of the display panel 110 is described in more detail.

[0260] Reference Figure 15 The light-shielding metal layer, which serves as the first metal layer, can be disposed on the substrate SUB. The light-shielding metal layer, which serves as the first metal layer, is a layer in which a light-shielding metal, which serves as the first metal, is disposed, and can be the metal layer closest to the substrate SUB.

[0261] Reference Figure 15The light-shielding portion LS and the first touch line TL1 may be disposed in the light-shielding metal layer, which serves as the first metal layer. Furthermore, the first partial bridge TBls of the first touch bridge TB may be disposed in the light-shielding metal layer. The light-shielding portion LS, the first touch line TL1, and the first partial bridge TBls of the first touch bridge TB may include light-shielding metal.

[0262] Reference Figure 15 The buffer layer BUF can be configured to cover the light shield LS and the first touch line TL1. The buffer layer BUF can be a single layer or multiple layers.

[0263] Reference Figure 15 The active layer ACT can be set on the buffer layer BUF, and the gate insulating film GI can be set to cover the active layer ACT.

[0264] Reference Figure 15 The gate G and the second local bridge TBg of the first touch bridge TB can be disposed on the gate insulating film GI. The layer where the gate G and the second local bridge TBg of the first touch bridge TB are located is referred to as the gate metal layer as the second metal layer. The second local bridge TBg of the gate G and the first touch bridge TB may include the gate metal as the second metal. In addition, the first local base voltage line BVLg of the base voltage line BVL and the first local drive voltage line DVLg of the drive voltage line DVL can be further disposed in the gate metal layer.

[0265] Reference Figure 15 An interlayer insulating film (ILD) may be disposed on the gate G, and a source S and a drain D, comprising a third metal serving as the source-drain metal, may be disposed on the interlayer insulating film (ILD). Furthermore, a second local base voltage line BVLs of the base voltage line BVL and a second local drive voltage line DVL of the drive voltage line DVL may be further disposed in the source-drain metal layer, which serves as the third metal layer.

[0266] Reference Figure 15 The source electrode S can be connected to one side of the active layer ACT through a via in the gate insulating film GI. The drain electrode D can be connected to the other side of the active layer ACT through a via in the gate insulating film GI.

[0267] Reference Figure 15 The source S can be connected to the optical shield LS via a via in the gate insulating film GI and the buffer layer BUF. Therefore, the drive transistor DRT can be operated stably in relation to the body effect.

[0268] Reference Figure 15The first passivation film PAS1 can be disposed on the source-drain metal layer. The cathode contact pattern CNT_DCE can be disposed on the first passivation film PAS1. The layer containing the cathode contact pattern CNT_DCE is referred to as the fourth metal layer. The cathode contact pattern CNT_DCE can be connected to the second local base voltage line BVLs of the base voltage line BVL via the vias of the first passivation film PAS1. (Refer to...) Figure 11 A portion of the second local base voltage line BVLs connected to the base voltage line BVL displaying the cathode contact pattern CNT_DCE may correspond to the line protrusion BVLs_PRT of the base voltage line BVL.

[0269] Reference Figure 15 The second passivation film PAS2 can be configured to cover the display cathode contact pattern CNT_DCE on the first passivation film PAS1. The metal layer between the first passivation film PAS1 and the second passivation film PAS2 can be a fourth metal layer formed of a fourth metal, and the display cathode contact pattern CNT_DCE can be located in the fourth metal layer.

[0270] Reference Figure 15 The coating layer OC can be disposed on the first passivation film PAS1 and the second passivation film PAS2. The lower part of the coating layer OC can have an undercut structure.

[0271] Reference Figure 15 The anode AE ​​can be disposed on the coating layer OC, and the anode AE ​​can be connected to the source S of the driving transistor DRT through the through hole of the coating layer OC and the first passivation film PAS1.

[0272] Reference Figure 15 A dam portion BK may be disposed on the anode AE, and the dam portion BK may have an opening. A portion of the upper surface of the anode AE ​​may be exposed through the opening in the dam portion BK. The dam portion BK may be disposed in the pixel region PA and may not be disposed in the first transmission region TA1.

[0273] Reference Figure 15 The light-emitting layer EL can be disposed in both the pixel region PA and the first transmission region TA1. In the pixel region PA, the light-emitting layer EL can be disposed on the embankment BK and can be configured to contact the anode AE ​​in the opening of the embankment BK. In the first transmission region TA1, the light-emitting layer EL can be disposed on the coating layer OC.

[0274] However, the light-emitting layer EL in pixel region PA and the light-emitting layer EL in first transmission region TA1 are disconnected from each other at the boundary region between pixel region PA and first transmission region TA1. In other words, the light-emitting layer EL can be disconnected by the undercut structure of coating layer OC at the boundary region between pixel region PA and first transmission region TA1.

[0275] Reference Figure 15 The cathode electrode material in the cathode electrode layer CEL can be located on the light-emitting layer EL, and can be disconnected in the boundary region between the pixel region PA and the first transmission region TA1 through the undercut structure of the coating layer OC. Therefore, the cathode electrode material located on the light-emitting layer EL in the pixel region PA can constitute the display cathode DCE. The cathode electrode material located on the light-emitting layer EL in the first transmission region TA1 can constitute the first touch cathode TCE1.

[0276] Reference Figure 15 In the boundary region between the pixel region PA and the first transmission region TA1, the display cathode DCE can be electrically connected to the display cathode contact pattern CNT_DCE via the vias of the coating layer OC and the second passivation film PAS2. Therefore, the display cathode DCE can be electrically connected to the second local base voltage line BVLs of the base voltage line BVL via the display cathode contact pattern CNT_DCE.

[0277] Reference Figure 15 In another boundary region between the pixel region PA and the first transmission region TA1, the first touch cathode TCE1 can be electrically connected to the second local bridge TBg of the first touch bridge TB via the through-hole of the coating layer OC and the second passivation film PAS2.

[0278] Reference Figure 15 The display cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 can be located in the cathode electrode layer CEL, and the encapsulation layer ENCAP can be disposed on the display cathode DCE, the first touch cathode TCE1, and the second touch cathode TCE2 located in the cathode electrode layer CEL.

[0279] Reference Figure 15 The encapsulation layer ENCAP may include an encapsulation substrate, a dam located between the thin-film transistor array substrate SUB and the encapsulation substrate ENCAP_SUB along the outer edge of the display area DA, and a filler ENCAP_FILL filling the internal space of the dam.

[0280] The ENCAP encapsulation layer can be constructed in various types. Unlike... Figure 15 The encapsulation layer ENCAP can be constructed to include one or more inorganic layers and one or more organic layers.

[0281] At the same time, refer to Figure 15 The maximum separation distance Ht between the first touch cathode TCE1 and the substrate SUB and the maximum separation distance Ht between the second touch cathode TCE2 and the substrate SUB can both be shorter than the maximum separation distance Hd between the display cathode DCE and the substrate SUB.

[0282] Figures 16 to 19 This is a plan view illustrating the display panel 110 of the transparent touch display device 100 according to an embodiment of the present invention.

[0283] Reference Figure 16 Regarding the first transmission region TA1, the display panel 110 may include multiple touch lines TL1, TL2, and TL3 that overlap with the first touch cathode TCE1. However, regarding the second transmission region TA2, the display panel 110 may not include multiple touch lines TL4, TL5, and TL6 that overlap with the second touch cathode TCE2.

[0284] Because the number of touch lines is determined based on the number of touch electrodes, the arrangement of touch lines in the first transmission region TA1 and the second transmission region TA2 may be uneven, such as... Figure 16 As shown. This can lead to reduced touch sensitivity.

[0285] Reference Figure 17 It may further include virtual lines DM1, DM2, and DM3 that overlap with the second touch cathode TCE2, in order to solve the problem of uneven arrangement of touch lines in the first transmission region TA1 and the second transmission region TA2.

[0286] The number of virtual lines DM1, DM2, and DM3 that overlap with the second touch cathode TCE2 can be equal to the number of multiple touch lines TL1, TL2, and TL3 that overlap with the first touch cathode TCE1.

[0287] The virtual lines DM1, DM2, and DM3 that overlap with the second touch cathode TCE2 may have different electrical states than the first touch line TL1, or may have a floating state, or may not be sensed by the touch driving circuit 160 that senses the first touch line TL1.

[0288] Reference Figure 18 Regarding the second transmission region TA2, the display panel 110 may include multiple touch lines TL4, TL5, and TL6 that overlap with the second touch cathode TCE2. However, regarding the first transmission region TA1, the display panel 110 may not include multiple touch lines TL1, TL2, and TL3 that overlap with the first touch cathode TCE1.

[0289] Because the number of touch lines is determined based on the number of touch electrodes, the arrangement of touch lines in the first transmission region TA1 and the second transmission region TA2 may be uneven, such as... Figure 18 As shown. This can lead to reduced touch sensitivity.

[0290] Reference Figure 19It may further include virtual lines DM4, DM5 and DM6 overlapping with the first touch cathode TCE1, in order to solve the problem of uneven arrangement of touch lines in the first transmission region TA1 and the second transmission region TA2.

[0291] The number of virtual lines DM4, DM5 and DM6 overlapping with the first touch cathode TCE1 can be equal to the number of multiple touch lines TL4, TL5 and TL6 overlapping with the second touch cathode TCE2.

[0292] The virtual lines DM4, DM5, and DM6 that overlap with the first touch cathode TCE1 may have different electrical states than the multiple touch lines TL4, TL5, and TL6 that overlap with the second touch cathode TCE2, having a floating state, or not being sensed by the touch drive circuit 160 that senses the multiple touch lines TL4, TL5, and TL6 that overlap with the second touch cathode TCE2.

[0293] According to the embodiments of the present invention as described above, a transparent touch display device can be provided, which includes a display panel having a built-in touch sensor capable of accurate touch sensing and having excellent self-illumination performance and high transmittance.

[0294] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor on a cathode electrode layer through a cathode segmentation.

[0295] According to an embodiment of the present invention, a transparent touch display device is provided, which has a touch sensor built into the display panel and does not affect the transmittance of the display panel.

[0296] According to embodiments of the present invention, a transparent touch display device can be provided, which can thin the display panel and reduce the complexity of the panel manufacturing process.

[0297] According to an embodiment of the present invention, a transparent touch display device can be provided, which, when placing the light-emitting element and the touch sensor in the display panel, can minimize the impact of the driving of the light-emitting element on touch sensing by placing the touch line in a metal layer at the position furthest from the anode of the light-emitting element.

[0298] According to an embodiment of the present invention, a transparent touch display device can be provided, which can reduce or prevent parasitic capacitance in touch lines arranged in a display panel.

[0299] The above description has been provided to enable any person skilled in the art to acquire and use the technical concept of the invention, and has been provided in the context of a specific application and its requirements. Various modifications, additions, and substitutions to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the invention. The above description and drawings are provided merely as examples of the technical concept of the invention for illustrative purposes. That is, the disclosed embodiments are intended to illustrate the scope of the technical concept of the invention. Therefore, the scope of the invention is not limited to the embodiments shown, but conforms to the widest scope consistent with the claims. The scope of protection of the invention should be interpreted based on the appended claims, and all technical concepts within the equivalent scope of the claims should be interpreted as being included within the scope of the invention.

Claims

1. A transparent touch display device, comprising: A substrate, the substrate including a pixel region, a first transmissive region located on a first side of the pixel region, and a second transmissive region located on a second side of the pixel region; A driving transistor is disposed in the pixel region; An anode is disposed in the pixel region, the anode being located on the driving transistor and electrically connected to the source or drain of the driving transistor; The light-emitting layer located on the anode; The display cathode is located on the light-emitting layer; A first touch cathode is disposed in the first transmission region and located on the first side of the display cathode; A second touch cathode is disposed in the second transmission region and located on the second side of the display cathode; An encapsulation layer disposed on the display cathode, the first touch cathode, and the second touch cathode; as well as The first touch line that overlaps with the first touch cathode The display cathode is electrically isolated from the first touch cathode and the second touch cathode.

2. The transparent touch display device according to claim 1, wherein the first touch line is disposed in the metal layer closest to the substrate.

3. The transparent touch display device according to claim 1, wherein the display cathode comprises the same material as the first touch cathode and the second touch cathode.

4. The transparent touch display device according to claim 1, further comprising a first touch bridge that electrically connects the first touch cathode and the second touch cathode across the pixel region. The first touch bridge intersects with and is electrically connected to the first touch line.

5. The transparent touch display device according to claim 4, wherein the first touch bridge comprises a first partial bridge having a first metal and a second partial bridge having a second metal different from the first metal. The first local bridge and the second local bridge are located in different layers and are electrically connected to each other.

6. The transparent touch display device according to claim 5, wherein the first touch line comprises the first metal. The first touch line intersects with the second partial bridge of the first touch bridge.

7. The transparent touch display device according to claim 5 further includes a first data line, a second data line, a third data line, and a fourth data line disposed in the pixel region. Each of the first data line, the second data line, the third data line, and the fourth data line includes a third metal that is different from the first metal and the second metal. Each of the first data line, the second data line, the third data line, and the fourth data line intersects with either the first partial bridge or the second partial bridge of the first touch bridge.

8. The transparent touch display device according to claim 5, further comprising a reference voltage line disposed in the pixel region. The reference voltage line includes the first metal and intersects with the second partial bridge of the first touch bridge.

9. The transparent touch display device according to claim 5, further comprising a base voltage line disposed in the pixel region and overlapping the display cathode, The base voltage line includes a first local base voltage line having the second metal and a second local base voltage line having a third metal different from the first metal and the second metal. The second local base voltage line includes a double-layer portion that overlaps with the first local base voltage line and a single-layer portion that does not overlap with the first local base voltage line. The first local base voltage line overlaps with the first local bridge of the first touch bridge, and the double-layer portion of the second local base voltage line overlaps with the first local bridge of the first touch bridge.

10. The transparent touch display device according to claim 9, further comprising a first scan signal line, the first scan signal line being configured to span the first transmissive region, the pixel region and the second transmissive region, wherein the first local base voltage line does not intersect the first scan signal line, and the second local base voltage line intersects the first scan signal line.

11. The transparent touch display device according to claim 5, further comprising driving voltage lines disposed in the pixel region and overlapping the display cathode, wherein the driving voltage lines include a first local driving voltage line having the second metal and a second local driving voltage line having a third metal different from the first metal and the second metal. The second local driving voltage line includes a double-layer portion that overlaps with the first local driving voltage line and a single-layer portion that does not overlap with the first local driving voltage line. The first local driving voltage line overlaps with the first local bridge of the first touch bridge, and the double-layer portion of the second local driving voltage line overlaps with the first local bridge of the first touch bridge.

12. The transparent touch display device according to claim 1, further comprising a base voltage line, the base voltage line being disposed in the pixel region, overlapping the display cathode, and electrically connected to the display cathode. The display cathode includes an electrode protrusion, the first touch cathode includes an electrode groove, the electrode protrusion of the display cathode is inserted into the electrode groove, and the base voltage line includes a line protrusion overlapping the electrode protrusion of the display cathode. The protrusion of the base voltage line is electrically connected to the electrode protrusion of the display cathode.

13. The transparent touch display device according to claim 12, wherein the first touch line overlaps with the first touch cathode and bends along the electrode groove of the first touch cathode.

14. The transparent touch display device according to claim 1, wherein the first touch line and the first touch cathode have the same electrical state.

15. The transparent touch display device according to claim 1, wherein the maximum spacing distance between the first touch cathode and the substrate and the maximum spacing distance between the second touch cathode and the substrate are both shorter than the maximum spacing distance between the display cathode and the substrate.

16. The transparent touch display device according to claim 1, further comprising a light shielding portion disposed in the pixel region, below the driving transistor and overlapping the active layer of the driving transistor, wherein the light shielding portion and the first touch line comprise the same material.

17. The transparent touch display device according to claim 1, wherein the display cathode, the first touch cathode and the second touch cathode comprise the same transparent conductive material, and wherein the anode comprises a reflective metallic material.

18. The transparent touch display device according to claim 1, further comprising: A first touch bridge, which spans the pixel region and electrically connects the first touch cathode and the second touch cathode; as well as The second touch line is disposed in the first transmission area, intersects with the first touch bridge, and overlaps with the second touch cathode.

19. The transparent touch display device according to claim 1, further comprising a virtual line overlapping the second touch cathode. The virtual line has a different electrical state from the first touch line, has a floating state, or is not used by the touch driving circuit to sense the first touch line.

20. The transparent touch display device according to claim 1, wherein the first touch cathode and the second touch cathode constitute a first touch electrode to which a touch driving signal is simultaneously applied, wherein the first touch electrode is electrically connected to the touch pad via the first touch line.

21. The transparent touch display device according to claim 1, wherein the display cathode includes a plurality of openings, The first touch cathode is disposed within the internal space of the first opening among the plurality of openings of the display cathode. The second touch cathode is disposed in the interior space of the second opening among the plurality of openings of the display cathode.

22. The transparent touch display device according to claim 1, wherein the first touch cathode and the second touch cathode are corresponding portions of a single integrated touch cathode. The touch cathode includes multiple openings. The display cathode is disposed within the interior space of one of the plurality of openings of the touch cathode.

23. The transparent touch display device according to claim 1, wherein the display cathode is located on a first side of the first touch cathode, and the other display cathode is disposed on a second side of the first touch cathode opposite to the first side. The other display cathode is configured to be separate from the display cathode.

24. The transparent touch display device of claim 1, further comprising a lower layer located below the display cathode, wherein the lower layer has an undercut structure recessed inward in its lower portion. At a point in the lower layer where the undercut structure is present, the display cathode and the first touch cathode are electrically separated from each other. At another point in the lower layer where the undercut structure is present, the display cathode and the second touch cathode are electrically separated from each other.

25. The transparent touch display device according to claim 12, wherein the electrode protrusion of the display cathode and the electrode groove of the first touch cathode are electrically separated from each other.

26. The transparent touch display device according to claim 12, wherein the electrode protrusion of the display cathode is configured to extend into the first transmissive region.

27. The transparent touch display device according to claim 1, wherein the first side of the display cathode is configured to extend into a partial region of the first transmissive region, and the second side of the display cathode is configured to extend into a partial region of the second transmissive region.

28. The transparent touch display device of claim 10, wherein the first touch line is located in a layer lower than the first scan signal line.

29. The transparent touch display device of claim 5, wherein the second metal is located in a layer higher than the second metal.

30. A transparent touch display device, comprising: A substrate, the substrate including a pixel region, a first transmissive region located on a first side of the pixel region, and a second transmissive region located on a second side of the pixel region; The display cathode to which the base voltage for display driving is applied; A first touch cathode is located on a first side of the display cathode and comprises the same material as the display cathode; The second touch cathode is located on a second side of the display cathode and comprises the same material as the display cathode; A first touch bridge, which spans the pixel region and electrically connects the first touch cathode and the second touch cathode; as well as The first touch line intersects with the first touch bridge and overlaps with the first touch cathode. The display cathode is electrically isolated from the first touch cathode and the second touch cathode.

31. The transparent touch display device according to claim 30, wherein the display cathode includes an electrode protrusion, wherein the first touch cathode includes an electrode groove, and the electrode protrusion of the display cathode is inserted into the electrode groove.

32. The transparent touch display device according to claim 31, wherein the electrode protrusion of the display cathode and the electrode groove of the first touch cathode are electrically separated from each other.

33. The transparent touch display device according to claim 32, wherein the electrode protrusion of the display cathode is configured to extend into the first transmissive region.

34. The transparent touch display device of claim 30, wherein a first side of the display cathode is configured to extend into a partial region of the first transmissive region, and a second side of the display cathode is configured to extend into a partial region of the second transmissive region.

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