Transparent display device with touch sensor

Abstract

A transparent display device having a touch sensor that can reduce or minimize light transmission loss due to the touch sensor and touch lines and can detect a defective touch sensor in a touch block is provided. The transparent display device having a touch sensor includes a plurality of transmissive areas and a non-transmissive area disposed between the transmissive areas adjacent to each other, a plurality of touch lines disposed in the non-transmissive area, and a plurality of touch blocks connected to the plurality of touch lines, respectively. Each of the plurality of touch blocks includes a plurality of touch sensors disposed in the plurality of transmissive areas and including M rows and N columns, a plurality of sensing lines disposed to correspond to the N columns, and a plurality of sensing transistors connected to the plurality of touch sensors, respectively, which transfer a voltage of the connected touch sensor to one of the plurality of sensing lines.

Description

Technical Field

[0001] This disclosure relates to a transparent display device having a touch sensor. Background Technology

[0002] Recently, research has been actively conducted on transparent display devices in which users can view objects or images located on opposite sides through the display device. The transparent display device includes a display area for displaying images, wherein the display area may include a transmissive area capable of transmitting external light and a non-transmissive area, and can have high light transmittance through the transmissive area.

[0003] Transparent display devices can be equipped with multiple touch sensors and multiple touch lines to achieve touch functionality. However, the problem with transparent display devices is that it is not easy to form multiple touch sensors and multiple touch lines, or the manufacturing process is complex and the light transmittance can be reduced due to the multiple touch sensors and multiple touch lines. Summary of the Invention

[0004] This disclosure was made in view of the above problems, and the purpose of this disclosure is to provide a transparent display device that can reduce or minimize the loss of light transmittance due to touch sensors and touch lines.

[0005] Another object of this disclosure is to provide a transparent display device capable of detecting defective touch sensors among a plurality of touch sensors disposed in a touch block.

[0006] Additional advantages, features, and aspects of this disclosure will be set forth in the following description, and will be apparent in part from the description, or may be learned by practice of this disclosure, upon examination of the following description. The objectives and other advantages of the inventive concept, as well as other features and aspects of this disclosure, can be realized and obtained by means of the structures specifically pointed out in the written description, its derivation, the claims, and the accompanying drawings.

[0007] According to one aspect of this disclosure, the above and other objectives can be achieved by providing a transparent display device with touch sensors, the transparent display device comprising: a plurality of transmissive regions and a non-transmissive region disposed between adjacent transmissive regions; a plurality of touch lines disposed in the non-transmissive region; and a plurality of touch blocks respectively connected to the plurality of touch lines. Each of the plurality of touch blocks includes a plurality of touch sensors disposed in the plurality of transmissive regions and comprising M rows and N columns, a plurality of sensing lines disposed corresponding to the N columns, and a plurality of sensing transistors respectively connected to the plurality of touch sensors, the plurality of sensing transistors transmitting a voltage of the connected touch sensor to one of the plurality of sensing lines.

[0008] Other systems, methods, features, and advantages will be or will become apparent to those skilled in the art upon review of the following figures and detailed description. All such additional systems, methods, features, and advantages are intended to be included within this specification, within the scope of this disclosure, and protected by the appended claims. Nothing in this section should be construed as limiting those claims. Other aspects and advantages are discussed below in conjunction with embodiments of this disclosure. It is to be understood that the foregoing general description and the following detailed description of this disclosure are exemplary and illustrative, intended to provide further explanation of the claimed disclosure. Attached Figure Description

[0009] The above and other objects, features and other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0010] Figure 1 This is a schematic plan view illustrating a transparent display panel;

[0011] Figure 2 This is an example of setting... Figure 1 A schematic diagram illustrating an example of pixels in region A;

[0012] Figure 3 This is an example of setting... Figure 2 A diagram showing examples of signal lines, touch lines, and touch sensors in region B;

[0013] Figure 4 This diagram illustrates the connection relationships between multiple touch blocks and multiple touch lines;

[0014] Figure 5 This is a diagram illustrating the connection relationships between multiple touch sensors and multiple touch lines in a touch block;

[0015] Figure 6 It is along Figure 3 A cross-sectional view taken from line II′;

[0016] Figure 7 This is a diagram illustrating an example of a touch sensor that is defective in the first undercut structure due to particles;

[0017] Figure 8 It is along Figure 3 A cross-sectional view taken from line II-II′;

[0018] Figure 9 It is along Figure 3 A cross-sectional view taken from line III-III′;

[0019] Figure 10 This is a diagram illustrating the current path when a defective touch sensor is present;

[0020] Figure 11 This diagram illustrates multiple sensor lines arranged in multiple touch blocks;

[0021] Figure 12 This is a graph illustrating the voltage difference between a normal touch sensor and a defective touch sensor;

[0022] Figure 13 This is a diagram illustrating an example of a resistive transistor used in place of a resistive sensor;

[0023] Figure 14 This is an example Figure 13 A diagram of a modified implementation method;

[0024] Figure 15 This is an example Figure 3 A diagram of a modified implementation method;

[0025] Figure 16 It is along Figure 15 A cross-sectional view taken from line IV-IV′;

[0026] Figure 17 The diagram illustrates an example of a defective touch sensor appearing in a touch block; and

[0027] Figure 18A and Figure 18B This is an example of setting in Figure 17 A graph showing the voltage of multiple touch sensors in the touch block.

[0028] Throughout the accompanying drawings and detailed description, unless otherwise stated, the same reference numerals should be understood to refer to the same elements, features, and structures. The relative sizes and depictions of these elements may be exaggerated for clarity, illustrative purposes, and convenience. Detailed Implementation

[0029] The advantages and features of this disclosure and its implementation methods will be illustrated by the following description of embodiments in conjunction with the accompanying drawings. However, this disclosure may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0030] The shapes, sizes, dimensions (e.g., length, width, height, thickness, radius, diameter, area, etc.), proportions, angles, and quantities of the elements disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore, this disclosure is not limited to the illustrated details.

[0031] For ease of description, dimensions including the size and thickness of each component shown in the figures are illustrated, and this disclosure is not limited to the size and thickness of the illustrated components. However, it should be noted that the positions and thicknesses of the components shown in the various figures submitted herein are part of this disclosure.

[0032] Similar reference numerals throughout the specification refer to similar elements. In the following description, detailed descriptions of relevant known functions or constructions will be omitted where it would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise stated, singular terms may include plural forms.

[0033] When interpreting elements, even without explicit description, elements are interpreted as including a range of error.

[0034] When describing positional relationships, such as "on top of," "above," "below," and "near," one or more parts may be arranged between two other parts unless "just" or "directly" is used.

[0035] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0036] In describing the elements of this disclosure, the terms “first,” “second,” etc., may be used. These terms are intended to identify the corresponding element from the other elements, and the basis, order, or number of the corresponding elements is not limited by these terms. The expression “connected” or “linked” to another element should be understood to mean that the element can be directly connected or linked to the other element, but unless specifically mentioned, the element can also be indirectly connected or linked to the other element and a third element can be inserted between the corresponding elements.

[0037] The features of the various embodiments of this disclosure may be partially or entirely linked or combined with each other, and may interoperate with each other in various ways and be technically driven, as will be fully understood by those skilled in the art. The embodiments of this disclosure may be implemented independently of each other or may be implemented together in a dependent relationship.

[0038] Figure 1 This is a schematic plan view illustrating a transparent display panel.

[0039] In the following text, for example, the X-axis represents a line parallel to the scan line, the Y-axis represents a line parallel to the data line, and the Z-axis represents the height direction of the transparent display device 100.

[0040] Although the transparent display device 100 according to one embodiment of the present disclosure has been described as an organic light-emitting display device, the transparent display device 100 may be implemented as a liquid crystal display device, a plasma display panel (PDP), a quantum dot light-emitting display (QLED), or an electrophoretic display device, etc.

[0041] Reference Figure 1 According to one embodiment of the present disclosure, a transparent display device includes a transparent display panel 110. The transparent display panel 110 may include a display area DA provided with pixels for displaying images, and a non-display area NDA for not displaying images.

[0042] The display area DA can be configured with a first signal line SL1, a second signal line SL2, and pixels. The non-display area NDA can be configured with a pad area PA containing pads and at least one scan driver 205.

[0043] A first signal line SL1 may extend in a display area DA along a first direction (e.g., the Y-axis direction). The first signal line SL1 may intersect a second signal line SL2 in the display area DA. The second signal line SL2 may extend in a second direction (e.g., the X-axis direction) in the display area DA. Pixels may be disposed in the area where the first signal line SL1 and the second signal line SL2 intersect each other, and emit predetermined light to display an image.

[0044] The scan driver 205 is connected to the scan line and provides a scan signal to the scan line. The scan driver 205 can be set in the non-display area NDA on one or both sides of the display area DA of the transparent display panel 110 by means of the in-panel gated driver (GIP) method or the tape auto-encapsulation (TAB) method.

[0045] In addition to the first signal line SL1, the second signal line SL2, and the pixels, the transparent display panel 110 may also include touch lines and a touch sensor to enable touch functionality. See below for further details. Figures 2 to 18B A detailed description of the touch line and touch sensor.

[0046] Figure 2 This is an example of setting... Figure 1 A schematic diagram of an example of pixels in region A, while Figure 3 This is an example of setting... Figure 2 A diagram showing examples of signal lines, touch lines, and touch sensors in region B.

[0047] like Figure 2 As shown, the display area DA includes a transmissive area TA and a non-transmissive area NTA. The transmissive area TA is the region through which most of the external incident light passes, while the non-transmissive area NTA is the region through which most of the external incident light cannot pass. For example, the transmissive area TA can be an area with a transmittance greater than α% (e.g., approximately 90%), while the non-transmissive area NTA can be an area with a transmittance less than β% (e.g., approximately 50%). In this case, α is greater than β. Due to the transmissive area TA, the user can view objects or backgrounds arranged above the rear surface of the transparent display panel 110.

[0048] The non-transmissive region NTA may include a first non-transmissive region NTA1, a second non-transmissive region NTA2, and a plurality of pixels P. Pixel P may be located in the first non-transmissive region NTA1 or in the overlapping area of ​​the first non-transmissive region NTA1 and the second non-transmissive region NTA2, and emits predetermined light to display an image. The emitting region EA may correspond to the area in pixel P that emits light.

[0049] like Figure 2 As shown, each pixel P may include at least one of a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. The first sub-pixel SP1 may include a first emitting region EA1 that emits light of a first color. The second sub-pixel SP2 may include a second emitting region EA2 that emits light of a second color. The third sub-pixel SP3 may include a third emitting region EA3 that emits light of a third color. The fourth sub-pixel SP4 may include a fourth emitting region EA4 that emits light of a fourth color.

[0050] The first emitting region EA1 to the fourth emitting region EA4 can emit different colors of light. For example, the first emitting region EA1 can emit green light. The second emitting region EA2 can emit red light. The third emitting region EA3 can emit blue light. The fourth emitting region EA4 can emit white light. However, the emitting regions are not limited to this example. Each pixel P can also include subpixels that emit light of colors other than red, green, blue, and white. Furthermore, the arrangement order of subpixels SP1, SP2, SP3, and SP4 can be changed in various ways.

[0051] The first non-transmissive region NTA1 may extend in the display region DA along a first direction (e.g., the Y-axis direction) and may be configured to at least partially overlap the light-emitting regions EA1, EA2, EA3, and EA4. Multiple first non-transmissive regions NTA1 may be disposed in the transparent display panel 110, and a transmissive region TA may be disposed between two adjacent first non-transmissive regions NTA1. Within the first non-transmissive region NTA1, a first signal line extending in the first direction (e.g., the Y-axis direction), a touch line TL extending in the first direction (e.g., the Y-axis direction), and a sensing line SSL extending in the first direction (e.g., the Y-axis direction) may be arranged to be spaced apart from each other.

[0052] For example, the first signal line SL1 may include at least one of the following: pixel power line VDDL, common power line VSSL, reference line REFL, or data lines DL1, DL2, DL3, and DL4.

[0053] The pixel power line VDDL can provide a primary power supply to the driving transistors DTR of each sub-pixel SP1, SP2, SP3, and SP4 located in the display area DA. The primary power supply can be an anode power supply.

[0054] The common power line VSSL can provide a second power supply to the cathode electrodes of sub-pixels SP1, SP2, SP3, and SP4 located in the display area DA. In this case, the second power supply can be a cathode power supply. The cathode power supply can be a common power supply commonly provided to sub-pixels SP1, SP2, SP3, and SP4.

[0055] like Figure 3 As shown, the common power line VSSL can supply cathode power to the cathode electrode through the cathode contact electrode CCT disposed between the transmission region TA and the common power line VSSL. A power connection line VCL can be disposed between the common power line VSSL and the cathode contact electrode CCT. One end of the power connection line VCL can be connected to the common power line VSSL through the first contact hole CH1, and the other end can be connected to the cathode contact electrode CCT. The cathode electrode can be connected to the cathode contact electrode CCT. Therefore, the cathode electrode can be electrically connected to the common power line VSSL through the power connection line VCL and the cathode contact electrode CCT.

[0056] The reference line REFL can provide an initialization voltage (or reference voltage) to the driving transistors DTR of each sub-pixel SP1, SP2, SP3, and SP4 located in the display area DA. The reference line REFL can be positioned between multiple data lines DL1, DL2, DL3, and DL4. For example, the reference line REFL can be positioned in the center of the multiple data lines DL1, DL2, DL3, and DL4, that is, between the second data line DL2 and the third data line DL3.

[0057] The reference line REFL can branch and connect to multiple sub-pixels SP1, SP2, SP3, and SP4. Specifically, the reference line REFL can connect to the circuitry elements of multiple sub-pixels SP1, SP2, SP3, and SP4 to provide an initialization voltage (or reference voltage) to each sub-pixel SP1, SP2, SP3, and SP4.

[0058] Each data line DL1, DL2, DL3, and DL4 can provide a data voltage to sub-pixels SP1, SP2, SP3, and SP4. For example, the first data line DL1 can provide a first data voltage to the first driving transistor of the first sub-pixel SP1, the second data line DL2 can provide a second data voltage to the second driving transistor of the second sub-pixel SP2, the third data line DL3 can provide a third data voltage to the third driving transistor of the third sub-pixel SP3, and the fourth data line DL4 can provide a fourth data voltage to the fourth driving transistor of the fourth sub-pixel SP4.

[0059] In a transparent display panel 110 according to one embodiment of the present disclosure, touch lines TL may also be provided in a first non-transmissive region NTA1. At least two touch lines TL may be provided in the first non-transmissive region NTA1. When multiple touch lines TL are provided in the transmissive region TA of the transparent display panel 110, the light transmittance may be degraded due to the multiple touch lines TL.

[0060] Furthermore, slits, specifically elongated lines or rectangular shapes, can be provided between the multiple touch lines TL. When external light passes through the slits, diffraction may occur. According to diffraction, light corresponding to a plane wave can become a spherical wave as it passes through the slits, and interference may occur within the spherical wave. Therefore, constructive and destructive interferences occur in the spherical wave, resulting in irregular light intensity for the external light that has passed through the slits. Consequently, the sharpness of objects or images located on opposite sides can be reduced in the transparent display panel 110. Therefore, the multiple touch lines TL are preferably located in the first non-transmissive region NTA1, rather than in the transmissive region TA.

[0061] Multiple touch lines TL can be positioned between the first signal line SL1 in the first non-transmissive region NTA1 and the transmissive region TA, such as... Figure 3As shown. For example, six touch lines TL1, TL2, TL3, TL4, TL5, and TL6 can be provided in a first non-transmissive region NTA1. Three of the six touch lines TL1, TL2, and TL3 can be positioned between the pixel power line VDDL and the transmissive region TA, while the other three touch lines TL4, TL5, and TL6 can be positioned between the common power line VSSL and the transmissive region TA, but are not limited to this arrangement. It is required that the multiple touch lines TL do not overlap with the circuit regions CA1, CA2, CA3, and CA4 where circuit elements are arranged, and the arrangement order of the first signal line SL1 and the multiple touch lines TL can be modified in various ways.

[0062] In a transparent display panel 110 according to one embodiment of the present disclosure, a sensing line SSL may also be provided in the first non-transmissive region NTA1. The sensing line SSL is used to detect whether a short circuit occurs between the cathode electrode of the light-emitting element and the touch sensor electrode of the touch sensor TS, and the voltage applied to the touch sensor electrodes of the plurality of touch sensors TS can be sensed by the sensing transistor SSTR.

[0063] The sensing line SSL can be positioned adjacent to the transmissive region TA in the first non-transmissive region NTA1. Specifically, the sensing line SSL can be positioned between multiple touch lines TL and the transmissive region TA. The multiple touch lines TL can be positioned between the pixel power line VDDL and the transmissive region TA, or between the common power line VSSL and the transmissive region TA. The multiple touch lines TL can generate parasitic capacitance with the pixel power line VDDL or the common power line VSSL. The multiple touch lines TL can have parasitic capacitance that decreases with increasing spacing from the pixel power line VDDL or the common power line VSSL, and can have parasitic capacitance that increases with decreasing spacing from the pixel power line VDDL or the common power line VSSL. For example, the parasitic capacitance of the first touch line TL1 can be smaller than that of the third touch line TL3. As a result, the deviation in parasitic capacitance between the multiple touch lines TL may increase, and touch performance may be degraded.

[0064] In a transparent display panel 110 according to one embodiment of the present disclosure, a sensing line SSL can be disposed between multiple touch lines TL and a transmissive region TA, thereby reducing the deviation of parasitic capacitance between the multiple touch lines TL. A touch line TL (e.g., the first touch line TL1) having the largest spacing distance from the pixel power line VDDL or the common power line VSSL can have the smallest spacing distance from the sensing line SSL. Therefore, in the case of the first touch line TL1, the parasitic capacitance between the first touch line TL1 and the pixel power line VDDL or the common power line VSSL is minimal, while the parasitic capacitance between the first touch line TL1 and the sensing line SSL can be maximum. On the other hand, a touch line TL (e.g., the third touch line TL3) having the smallest spacing distance from the pixel power line VDDL or the common power line VSSL can have the largest spacing distance from the sensing line SSL. Therefore, in the case of the third touch line TL3, the parasitic capacitance between the third touch line TL3 and the pixel power line VDDL or the common power line VSSL can be maximum, but the parasitic capacitance between the third touch line TL3 and the sensing line SSL can be minimum. As a result, the deviation of parasitic capacitance between multiple touch lines TL can be reduced.

[0065] Although Figure 3 An example is provided of providing a separate sensing line SSL in the transparent display panel 110, but this disclosure is not limited thereto. In another embodiment, at least one of the pixel power line VDDL, the common power line VSSL, the reference line REFL, and the data lines DL1, DL2, DL3, and DL4 can be used as the sensing line SSL.

[0066] According to one embodiment of the present disclosure, a transparent display panel 110 includes pixels P located between adjacent transmissive regions TA, and pixels P may include light-emitting regions EA1, EA2, EA3, and EA4 in which light-emitting elements are disposed to emit light. Since the size of the non-transmissive regions NTA in the transparent display panel 110 is small, the circuit elements may be configured to at least partially overlap with the light-emitting regions EA1, EA2, EA3, and EA4.

[0067] In a transparent display panel 110 according to one embodiment of the present disclosure, multiple touch lines TL do not overlap with circuit regions CA1, CA2, CA3, and CA4, thereby reducing or minimizing the parasitic capacitance of the touch lines TL due to circuit elements. Simultaneously, the difference in horizontal distance between the touch lines TL can be reduced to improve the uniformity of parasitic capacitance.

[0068] The second non-transmissive region NTA2 may extend in the display region DA along a second direction (e.g., the X-axis direction) and may be configured to at least partially overlap with the light-emitting regions EA1, EA2, EA3, and EA4. Multiple second non-transmissive regions NTA2 may be disposed in the transparent display panel 110, and a transmissive region TA may be disposed between two adjacent second non-transmissive regions NTA2. The second signal line SL2 and the touch bridge wiring TBL may be configured to be spaced apart from each other within the second non-transmissive regions NTA2.

[0069] The second signal line SL2 may extend in a second direction (e.g., the X-axis direction) and may include, for example, a scan line SCANL. The scan line SCANL may provide scan signals to the sub-pixels SP1, SP2, SP3, and SP4 of pixel P.

[0070] The touch bridge connector TBL can connect any one of multiple touch lines TL to a touch sensor TS. The touch bridge connector TBL can be connected to any one of the multiple touch lines TL via the second contact hole CH2. Furthermore, the touch bridge connector TBL can connect to at least two touch sensors TS arranged in the second direction (e.g., the X-axis direction) while extending along the second direction (e.g., the X-axis direction).

[0071] In a transparent display panel 110 according to one embodiment of the present disclosure, multiple touch lines TL can be disposed in a first non-transmissive region NTA1 instead of a second non-transmissive region NTA2, thereby preventing the light transmittance from deteriorating due to the multiple touch lines TL. Figure 3 As shown, the second non-transmissive region NTA2, extending in a second direction (e.g., the X-axis direction), intersects with the adjacent transmissive region TA. When the width of the second non-transmissive region NTA2, which intersects with the transmissive region TA, increases, the size of the transmissive region TA necessarily decreases. When multiple touch lines TL are provided in the second non-transmissive region NTA2, the width of the second non-transmissive region NTA2 increases to accommodate a large number of lines, and the size of the transmissive region TA decreases. In other words, the light transmittance of the transparent display panel 110 may decrease due to the multiple touch lines TL.

[0072] In a transparent display panel 110 according to one embodiment of the present disclosure, multiple touch lines TL can be disposed in a first non-transmissive region NTA1, and a single touch bridge connection TBL for connecting multiple touch sensors TS can be disposed in a second non-transmissive region NTA2. Therefore, the transparent display panel 110 according to one embodiment of the present disclosure can reduce or minimize the reduction in the size or light transmittance of the transmissive region TA caused by the multiple touch lines TL and the touch bridge connection TBL.

[0073] A touch sensor TS can be disposed in a transmissive area TA. The touch sensor TS can be disposed in each of multiple transmissive areas TA and its capacitance can change during user contact. A touch driver (not shown) can be connected to multiple touch sensors TS via multiple touch lines TL to detect capacitance changes in the multiple touch sensors TS. Multiple touch sensors TS can correspond one-to-one with multiple pixels P.

[0074] In the following text, reference will be made to Figure 4 and Figure 5 This section describes in more detail the connection relationships between multiple touch sensors (TS), multiple touch lines (TL), and multiple touch bridge wires (TBL).

[0075] Figure 4 It is a diagram illustrating the connection relationships between multiple touch blocks and multiple touch lines, and Figure 5 This is a diagram illustrating the connection relationships between multiple touch sensors and multiple touch lines in a touch block.

[0076] Reference Figures 4 to 5 According to one embodiment of this disclosure, the transparent display panel 110 may include a plurality of touch blocks TB. Each of the plurality of touch blocks TB may include a plurality of pixels P and a plurality of transmissive regions TA configured to correspond one-to-one with the plurality of pixels P, serving as a basic unit for determining the user's touch position. For example, each of the plurality of touch blocks TB may include 12×15 pixels P and 12×15 touch sensors TS. In this case, when the image resolution is 1920×1080, the touch resolution may be 160×72.

[0077] In this case, the touch sensor TS may include a touch sensor electrode TSE. The touch sensor electrode TSE may be made of the same material as the cathode electrode CE of the pixel P in the same layer. In this case, the touch sensor electrode TSE and the cathode electrode CE may be spaced apart from each other.

[0078] In a transparent display panel 110 according to one embodiment of the present disclosure, since each of the multiple touch lines TL is connected to one of the multiple touch blocks TB, the capacitance change of the touch sensor TS disposed in the connected touch block TB can be sensed. That is, the multiple touch lines TL disposed in the transparent display panel 110 can correspond one-to-one with the multiple touch blocks TB. Therefore, the number of touch lines TL can be the same as the number of touch blocks TB in the transparent display panel 110. For example, when the number of touch blocks TB is 160×72, the number of touch lines TL can also be 160×72, and can be connected to the touch driver TIC.

[0079] As described above, in order to form as many touch lines TL as there are touch blocks TB, at least two touch lines TL should be provided in a first non-transmissive area NTA1. For example, when the image resolution is 1920×1080 and the touch resolution is 160×72, such as Figure 3 As shown, six touch lines TL1, TL2, TL3, TL4, TL5 and TL6 can be provided in a first non-transparent area NTA1 to form 160×72 touch lines TL in the transparent display panel 110.

[0080] Multiple touch sensors TS located in a touch block TB can be connected to one of the multiple touch lines TL located in a touch block TB, such as... Figure 5 As shown. For example, twelve first non-transmissive regions NTA1 can be set in a touch block TB, and six touch lines TL1, TL2, TL3, TL4, TL5, and TL6 can be set in each of the twelve first non-transmissive regions NTA1. As a result, a touch block TB can be provided with 72 touch lines TL1, ..., TL72. In this case, multiple touch sensors TS set in a touch block TB can be connected to a specific touch line TL among the 72 touch lines TL1, ..., TL72. At this time, the specific touch line TL can be connected to the multiple touch sensors TS arranged in the second direction (e.g., the X-axis direction) through a touch bridge wire TBL extending in the second direction (e.g., the X-axis direction). As a result, multiple touch sensors TS set in a touch block TB can be electrically connected through the specific touch line TL and the touch bridge wire TBL.

[0081] Each of the multiple touch lines TL can correspond one-to-one with a touch block TB. Therefore, multiple touch blocks TB are connected to different touch lines and are thus electrically isolated from each other. Each touch line TL can connect multiple touch sensors TS disposed in the corresponding touch block TB to the touch driver TIC. Specifically, each touch line TL can send a modified capacitance provided by the touch sensors TS disposed in the touch block TB to the touch driver TIC. The touch driver TIC can sense the modified capacitance and determine the user's touch position. Furthermore, each touch line TL can provide a sensing voltage generated by the touch driver TIC to the touch sensors TS disposed in the touch block TB.

[0082] In the following text, reference will be made to Figures 6 to 7 A more detailed description of the light-emitting element in the light-emitting area EA and the touch sensor TS in the transmission area TA.

[0083] Figure 6 It is along Figure 3 The cross-sectional view taken from line II′, and Figure 7This is a diagram illustrating an example of a defective touch sensor in the first undercut structure due to particles.

[0084] Reference Figure 3 , Figure 6 and Figure 7 According to one embodiment of the present disclosure, the first substrate 111 of the transparent display panel 110 may include a plurality of transmissive regions TA and non-transmissive regions NTA. The non-transmissive regions NTA include a plurality of light-emitting regions EA disposed between adjacent transmissive regions TA. The non-transmissive regions NTA may include a first non-transmissive region NTA1 extending in a first direction (e.g., the Y-axis direction) and a second non-transmissive region NTA2 extending in a second direction (e.g., the X-axis direction).

[0085] The first non-transmissive region NTA1 includes circuit regions CA1, CA2, CA3, and CA4 in which at least one transistor and a capacitor are disposed, and may be provided with pixel power lines VDDL, common power lines VSSL, reference lines REFL, data lines DL, and touch lines TL extending in a first direction (e.g., the Y-axis direction) and configured not to overlap with the circuit regions CA1, CA2, CA3, and CA4. The second non-transmissive region NTA2 may include scan lines SCANL and touch bridge lines TBL extending in a second direction (e.g., the X-axis direction).

[0086] At least one transistor may include a drive transistor DTR and a switching transistor. The switching transistor may be switched according to a scan signal provided to the scan line SCANL to charge a capacitor with the data voltage provided from the data line DL.

[0087] The driving transistor DTR switches according to the data voltage charged in the capacitor to generate data current from the power supplied by the pixel power line VDDL and provides the data current to the first electrode 120 of sub-pixels SP1, SP2, SP3 and SP4. The driving transistor DTR may include an active layer ACT1, a gate GE1, a source SE1 and a drain DE1.

[0088] like Figure 6 As shown, a light-shielding layer LS can be disposed above the first substrate 111. The light-shielding layer LS can be used to block external light incident on the active layer ACT1 in the area where the driving transistor DTR is disposed. The light-shielding layer LS can comprise a single layer or multiple layers made of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0089] According to one embodiment of the present disclosure, a transparent display panel 110 may form at least one of pixel power lines VDDL, common power lines VSSL, reference lines REFL, data lines DL, touch lines TL, touch bridge wires TBL, and sensing lines SSL in the same layer as the light-shielding layer LS. For example, the reference lines REFL, touch lines TL, touch bridge wires TBL, and sensing lines SSL may include the same material as the light-shielding layer LS and may be disposed in the same layer as the light-shielding layer LS, but are not limited thereto.

[0090] The buffer layer BF can be disposed above the light-shielding layer LS. The buffer layer BF is used to protect the transistor DTR from water that permeates through the first substrate 111, which is easily permeable by water, and may include inorganic layers, such as silicon oxide (SiOx), silicon nitride (SiNx), or a multilayer of silicon oxide and silicon nitride layers.

[0091] The active layer ACT1 of the driving transistor DTR can be disposed above the buffer layer BF. The active layer ACT1 can include silicon-based semiconductor materials or oxide-based semiconductor materials.

[0092] The gate insulating layer GI can be disposed above the active layer ACT1 of the driving transistor DTR. The gate insulating layer GI can be disposed in the non-transmissive region NTA and the transmissive region TA. However, in order to form a first undercut structure UC1 in the transmissive region TA, the gate insulating layer GI can be provided with a first opening region OA1 formed to expose the buffer layer BF, without being disposed in at least a portion of the transmissive region TA. The gate insulating layer GI can include inorganic layers, such as a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer of silicon oxide and silicon nitride layers.

[0093] The gate GE1 of the driving transistor DTR can be disposed above the gate insulating layer GI. The gate GE1 may comprise a single layer or multiple layers made of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu).

[0094] The interlayer dielectric layer (ILD) can be disposed above the gate GE1 of the driving transistor DTR. The ILD can be disposed in the non-transmissive region NTA and the transmissive region TA. However, the ILD may have a first opening region OA1 exposing the buffer layer BF, without being disposed in at least a portion of the transmissive region TA, to form a first undercut structure UC1 in the transmissive region TA. The ILD may include inorganic layers, such as silicon oxide (SiOx), silicon nitride (SiNx), or a multilayer of silicon oxide and silicon nitride layers.

[0095] The source SE1 and drain DE1 of the driving transistor DTR can be disposed above the interlayer dielectric layer ILD. The source SE1 and drain DE1 of the driving transistor DTR can be connected to the active layer ACT1 of the driving transistor DTR through the fifth contact hole CH5 passing through the gate insulating layer GI and the interlayer dielectric layer ILD. The source SE1 and drain DE1 of the driving transistor DTR can be made of a single layer or multiple layers made of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu).

[0096] In a transparent display panel 110 according to one embodiment of the present disclosure, at least one of the pixel power line VDDL, common power line VSSL, reference line REFL, data line DL, touch line TL, touch bridge wire TBL, and sensing line SSL can be disposed in the same layer as the source SE1 and drain DE1 of the driving transistor DTR. For example, the pixel power line VDDL, common power line VSSL, and data line DL can be disposed in the same layer as the source SE1 and drain DE1, but are not limited thereto.

[0097] A passivation layer PAS for insulating the driving transistor DTR can be disposed above the source SE1 and drain DE1 of the driving transistor DTR. The passivation layer PAS can be disposed in the non-transmissive region NTA and the transmissive region TA. However, the passivation layer PAS can have a first opening region OA1 exposing the buffer layer BF, without being disposed in at least a portion of the transmissive region TA, to form a first undercut structure UC1 in the transmissive region TA. The first opening region OA1 of the passivation layer PAS can at least partially overlap with the first opening region OA1 of the interlayer dielectric layer ILD and the first opening region OA1 of the gate insulating layer GI. The passivation layer PAS can include inorganic layers, such as a silicon oxide layer (SiOx), a silicon nitride layer (SiNx), or a multilayer of silicon oxide and silicon nitride layers.

[0098] A planarization layer PLN can be disposed above the passivation layer PAS to planarize the step difference caused by the driving transistor DTR and multiple signal lines. The planarization layer PLN can be disposed in the non-transmissive region NTA, and may not be disposed in at least a portion of the transmissive region TA, to form a first undercut structure UC1 in the transmissive region TA. The planarization layer PLN may include an organic layer, such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin.

[0099] In a transparent display panel 110 according to one embodiment of the present disclosure, a first undercut structure UC1 can be formed using a planarization layer PLN and a plurality of inorganic insulating layers (e.g., a passivation layer PAS, an interlayer dielectric layer ILD, and a gate insulating layer GI). Specifically, the first undercut structure UC1 can be formed such that the planarization layer PLN protrudes more than the plurality of inorganic insulating layers (e.g., the passivation layer PAS, the interlayer dielectric layer ILD, and the gate insulating layer GI) in the direction of the transmission region TA. Therefore, the first undercut structure UC1 can expose at least a portion of the lower surface of the planarization layer PLN, and the plurality of inorganic insulating layers may not be disposed below the exposed lower surface, thereby providing a gap space with the buffer layer BF.

[0100] The first undercut structure UC1 can be formed using a wet etching process. Considering the characteristics, the wet etching process used to form the first undercut structure UC1 can be isotropic etching. Therefore, in the first undercut structure UC1, the first gap distance d1 from the end of the planarization layer PLN to the ends of the plurality of inorganic insulating layers can be formed in the same manner as the second gap distance d2 from the lower surface of the planarization layer PLN to the upper surface of the buffer layer BF. In this case, the first gap distance d1 of the first undercut structure UC1 should have a minimum distance value, for example, 2 μm or greater, to ensure isolation between the cathode electrode CE and the touch sensor electrode TSE. Therefore, since the second gap distance d2 of the first undercut structure UC1 should be greater than or equal to 2 μm, the sum of the thicknesses of the passivation layer PAS, the interlayer dielectric layer ILD, and the gate insulating layer GI can be 2 μm or greater.

[0101] The first undercut structure UC1 is disposed in the transmission region TA and may have a planar closed shape. For example, the first undercut structure UC1 may be disposed along the edge of the transmission region TA. In this case, the first undercut structure UC1 may be configured to surround the touch sensor TS.

[0102] In a transparent display panel 110 according to one embodiment of the present disclosure, a first undercut structure UC1 can be formed using a planarization layer PLN and a plurality of inorganic insulating layers, thereby preventing a reduction in light transmittance due to the first undercut structure UC1.

[0103] The light-emitting element, including the first electrode 120, the organic light-emitting layer 130, and the second electrode 140, as well as the embankment 125, can be disposed above the planarization layer PLN.

[0104] The first electrode 120 can be disposed above the planarization layer PLN of each sub-pixel SP1, SP2, SP3, and SP4. The first electrode 120 is not disposed in the transmission region TA. The first electrode 120 can be connected to the driving transistor DTR. Specifically, the first electrode 120 can be connected to one of the source SE1 and drain DE1 of the driving transistor DTR through a contact hole (not shown) passing through the planarization layer PLN and the passivation layer PAS.

[0105] The first electrode 120 may include a metallic material with high reflectivity, such as a laminated structure of aluminum and titanium (Ti / Al / Ti), a laminated structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, a laminated structure of Ag alloy and ITO (ITO / Ag alloy / ITO), a MoTi alloy, and a laminated structure of MoTi alloy and ITO (ITO / MoTi alloy / ITO). The Ag alloy may be an alloy of silver (Ag), palladium (Pd), copper (Cu), etc. The MoTi alloy may be an alloy of molybdenum (Mo) and titanium (Ti). The first electrode 120 may be the anode of the light-emitting element.

[0106] The dam 125 can be disposed above the planarization layer PLN. The dam 125 can be configured to at least partially cover the edge of the first electrode 120 and expose a portion of the first electrode 120. Therefore, the dam 125 can prevent the problem of deterioration in luminous efficiency due to current concentration at one end of the first electrode 120.

[0107] The dam 125 can define the light-emitting regions EA1, EA2, EA3, and EA4 of sub-pixels SP1, SP2, SP3, and SP4. The light-emitting regions EA1, EA2, EA3, and EA4 of each sub-pixel SP1, SP2, SP3, and SP4 represent areas where the first electrode 120, the organic light-emitting layer 130, and the cathode electrode CE are sequentially stacked, and holes from the first electrode 120 and electrons from the cathode electrode CE recombine with each other in the organic light-emitting layer 130 to emit light. In this case, the area where the dam 125 is provided can become a non-light-emitting region NEA because it does not emit light, and the area where the dam 125 is not provided and the first electrode is exposed can become a light-emitting region EA.

[0108] The embankment 125 may include an organic layer, such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin.

[0109] The organic light-emitting layer 130 may be disposed above the first electrode 120. The organic light-emitting layer 130 may include a hole transport layer, a light-emitting layer, and an electron transport layer. In this case, when a voltage is applied to the first electrode 120 and the cathode electrode CE, holes and electrons move to the light-emitting layer through the hole transport layer and the electron transport layer, respectively, and recombine with each other in the light-emitting layer to emit light.

[0110] In one embodiment, the organic light-emitting layer 130 may be a common layer disposed in sub-pixels SP1, SP2, SP3, and SP4. In this case, the light-emitting layer may be a white light-emitting layer for emitting white light.

[0111] In another embodiment, an organic light-emitting layer 130 can be provided for each sub-pixel SP1, SP2, SP3, and SP4. For example, a green light-emitting layer for emitting green light can be provided in the first sub-pixel SP1, a red light-emitting layer for emitting red light can be provided in the second sub-pixel SP2, a blue light-emitting layer for emitting blue light can be provided in the third sub-pixel SP3, and a white light-emitting layer for emitting white light can be provided in the fourth sub-pixel SP4. In this case, the light-emitting layer of the organic light-emitting layer 130 is not provided in the transmission region TA.

[0112] The organic light-emitting layer 130 can be separated in the non-transmissive region NTA and the transmissive region TA via the first undercut structure UC1. Specifically, the organic light-emitting layer 130 can be separated by the first undercut structure UC1 into an organic light-emitting layer 131 disposed in the non-transmissive region NTA and an organic light-emitting layer 132 disposed in the transmissive region TA. That is, the organic light-emitting layer 131 disposed in the non-transmissive region NTA and the organic light-emitting layer 132 disposed in the transmissive region TA can be spaced apart from each other by the first undercut structure UC1.

[0113] The second electrode 140 can be disposed above the organic light-emitting layer 130 and the embankment 125. When the second electrode 140 is deposited on the entire surface, the second electrode 140 can be separated from the non-transmissive region NTA and the transmissive region TA by the first undercut structure UC1, rather than being continuous. Specifically, the second electrode 140 can be separated by the first undercut structure UC1 into a second electrode CE disposed in the non-transmissive region NTA and a second electrode TSE disposed in the transmissive region TA.

[0114] In this configuration, the second electrode CE disposed in the non-transmissive region NTA can be a cathode electrode CE and is a component constituting the light-emitting element. The cathode electrode CE can be connected to the cathode contact electrode CCT to receive power from the common power line VSSL. The cathode electrode CE can be a common layer disposed in sub-pixels SP1, SP2, SP3, and SP4 to apply the same voltage.

[0115] Furthermore, the second electrode TSE disposed in the transmission region TA is the touch sensor electrode TSE, and can be a component constituting the touch sensor TS. The touch sensor electrode TSE can be connected to the second touch contact electrode TCT2 to provide capacitance changes to the touch line TL.

[0116] The second electrode 140, which includes the cathode electrode CE and the touch sensor electrode TSE, may comprise a transparent conductive material (TCO) that transmits light, such as ITO and IZO, or a semi-transmissive conductive material, such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). When the second electrode 140 comprises a semi-transmissive conductive material, the luminous efficiency can be improved through the microcavity.

[0117] The encapsulation layer 150 may be disposed above the light-emitting element and the touch sensor TS. The encapsulation layer 150 may also be disposed above the cathode electrode CE and the touch sensor electrode TSE, at least partially covering the cathode electrode CE and the touch sensor electrode TSE. The encapsulation layer 150 serves to prevent oxygen or water from penetrating into the organic light-emitting layer 130, the cathode electrode CE, and the touch sensor electrode TSE. For this purpose, the encapsulation layer 150 may include at least one inorganic layer and at least one organic layer.

[0118] The color filter CF can be disposed above the encapsulation layer 150. The color filter CF can be disposed above a surface of the second substrate 112 facing the first substrate 111. In this case, the first substrate 111 with the encapsulation layer 150 and the second substrate 112 with the color filter CF can be bonded to each other by the adhesive layer 160. At this time, the adhesive layer 160 can be an optically clear resin (OCR) layer or an optically clear adhesive (OCA) film.

[0119] The color filter CF can be configured to be patterned for each sub-pixel SP1, SP2, SP3, and SP4. A black background BM can be positioned between the color filters CF. The black background BM is positioned between sub-pixels SP1, SP2, SP3, and SP4 to prevent color mixing between adjacent sub-pixels SP1, SP2, SP3, and SP4. Additionally, the black background BM prevents externally incident light from being reflected by the multiple lines positioned between sub-pixels SP1, SP2, SP3, and SP4 (e.g., scan lines SCANL, pixel power lines VDDL, common power lines VSSL, reference lines REFL, data lines DL, etc.).

[0120] In a transparent display panel 110 according to one embodiment of the present disclosure, the touch sensor electrode TSE of the touch sensor TS and the cathode electrode CE of the light-emitting element can be disposed in the same layer using a first undercut structure UC1. In the transparent display panel 110 according to one embodiment of the present disclosure, the touch process is simplified, and a separate mask for the touch sensor electrode TSE is not required.

[0121] Furthermore, in a transparent display panel 110 according to one embodiment of the present disclosure, a planarization layer PLN and a plurality of inorganic insulating layers can be used to form a first undercut structure UC1, thereby forming the first undercut structure UC1 without sacrificing light transmittance.

[0122] Furthermore, in a transparent display panel 110 according to one embodiment of the present disclosure, a touch line TL can be disposed below the light-emitting element, thereby preventing the light-emitting efficiency of pixel P from being degraded due to the touch line TL.

[0123] Furthermore, in a transparent display panel 110 according to one embodiment of the present disclosure, the touch line TL can be configured not to overlap with the circuit regions CA1, CA2, CA3 and CA4, thereby reducing or minimizing the influence caused by circuit elements and improving the uniformity of parasitic capacitance.

[0124] Furthermore, in a transparent display panel 110 according to one embodiment of the present disclosure, multiple touch lines TL can be provided in a first non-transmissive region NTA1, and only one touch bridge wire TBL for connecting multiple touch sensors TS can be provided in a second non-transmissive region NTA2, thereby reducing or minimizing the reduction in size or light transmittance of the transmissive region TA caused by multiple touch lines TL and touch bridge wire TBL.

[0125] As described above, in a transparent display panel 110 according to one embodiment of the present disclosure, the touch sensor electrode TSE of the touch sensor TS and the cathode electrode CE of the light-emitting element can be separated from each other through a first undercut structure UC1. However, during the manufacturing process, particles P may appear in the first undercut structure UC1, such as... Figure 7 As shown. In this case, the touch sensor electrode TSE of the touch sensor TS and the cathode electrode CE of the light-emitting element may be electrically connected to each other and not separated.

[0126] Because all touch sensors TS included in a touch block TB are electrically connected to each other, even if a defect occurs in only one touch sensor TS, all touch sensor TS included in the corresponding touch block TB will fail to operate properly. Therefore, as Figure 7As shown, when a defective touch sensor TS is created by connecting the touch sensor electrode TSE of the touch sensor TS and the cathode electrode CE of the light-emitting element to each other, the user's touch cannot be sensed in the entire touch block TB including the defective touch sensor TS. In this case, multiple defective touch sensors TS can be created, and they can be set on different touch blocks TB. In this case, all multiple touch blocks TB with multiple defective touch sensors TS may be unable to sense touch, thus increasing the touch defect rate of the transparent display panel 110.

[0127] A transparent display panel 110 according to one embodiment of the present disclosure may include an element capable of identifying defective touch sensors TS among a plurality of touch sensors TS included in a touch block TB. Additionally, in the transparent display panel 110 according to one embodiment of the present disclosure, defective touch sensors TS and touch bridge wiring TBL can be electrically separated from each other through a repair process.

[0128] In the following text, reference will be made to Figure 3 and Figures 8 to 18B This paper describes an element capable of detecting a defective touch sensor TS, and describes a scenario where a defective touch sensor TS is detected using this element.

[0129] Figure 8 It is along Figure 3 The cross-sectional view taken from line II-II′, and Figure 9 It is along Figure 3 The cross-sectional view taken from line III-III′.

[0130] Reference Figure 3 , Figure 8 and Figure 9 According to one embodiment of the transparent display panel 110, the present disclosure may further include a sensing transistor SSTR for connecting a touch sensor TS to a sensing line SSL, and a touch connection portion TC for connecting the touch sensor TS to a touch bridge wire TBL. A defective touch sensor TS can be detected using the sensing transistor SSTR and the touch connection portion TC. Furthermore, in the transparent display panel 110 according to one embodiment of the present disclosure, when a defective touch sensor TS is detected, the touch connection portion TC connecting the defective touch sensor TS to the touch bridge wire TBL can be laser-cut, allowing the defective touch sensor TS and the touch bridge wire TBL to be electrically isolated from each other. As a result, the other touch sensors TS of the corresponding touch block TB can operate normally.

[0131] Each of the plurality of sensing transistors SSTRs can be connected to the touch sensor TS to transmit the voltage of the touch sensor TS to the sensing line SSL. Specifically, the sensing transistors SSTRs can be configured to at least partially overlap with the touch sensor TS, such as... Figure 3 and Figure 8 As shown, it can therefore be connected to the touch sensor TS and the sensing line SSL. The sensing transistor SSTR may include an active layer ACT2, a gate GE2, a source SE2, and a drain DE2. Figure 3 and Figure 8 In this embodiment, the active layer ACT2, gate GE2, source SE2, and drain DE2 of the sensing transistor SSTR are shown to all overlap with the touch sensor electrode TSE, but this is not a limitation. In another embodiment, at least a portion of the drain DE2 and the active layer ACT2 of the sensing transistor SSTR may at least partially overlap with the touch sensor electrode TSE, and the gate GE2 and source SE2 of the sensing transistor SSTR may be disposed between the touch sensor electrode TSE and the sensing line SSL.

[0132] The gate GE2 of the sensing transistor SSTR can be connected to the scan line SCANL. The active layer ACT2 of the sensing transistor SSTR can be disposed below the gate GE2 to at least partially overlap with the gate GE2. The active layer ACT2 can be connected to the source SE2 at one end through the seventh contact hole CH7, and can be connected to the drain DE2 at the other end through the eighth contact hole CH8.

[0133] The source SE2 of the sensing transistor SSTR can be connected to the sensing line SSL at one end through the sixth contact hole CH6, and to the active layer ACT2 at the other end through the seventh contact hole CH7. The drain DE2 of the sensing transistor SSTR can be connected to the active layer ACT2 at one end through the eighth contact hole CH8, and can contact the first touch contact electrode TCT1 at the other end. The drain DE2 of the sensing transistor SSTR and the first touch contact electrode TCT1 can be formed as a single unit.

[0134] The first touch contact electrode TCT1 can be disposed in the transmission region TA. The first touch contact electrode TCT1 can electrically connect the drain electrode DE2 to the touch sensor electrode TSE. A portion of the upper surface of the first touch contact electrode TCT1 can be exposed through the second undercut structure UC2, and the touch sensor electrode TSE can be connected to the exposed upper surface.

[0135] Specifically, the first touch contact electrode TCT1 can be disposed in a layer between the buffer layer BF and the passivation layer PAS. In one embodiment, the first touch contact electrode TCT1 can be disposed between the interlayer dielectric layer ILD and the passivation layer PAS. In this case, the passivation layer PAS can be provided with a second opening region OA2, which is formed to expose at least a portion of the upper surface of the first touch contact electrode TCT1. The second undercut structure UC2 can be formed such that the planarization layer PLN protrudes more than the passivation layer PAS in the second opening region OA2 of the passivation layer PAS. Therefore, the second undercut structure UC2 can expose at least a portion of the lower surface of the planarization layer PLN and at least a portion of the upper surface of the first touch contact electrode TCT1, while the passivation layer PAS is not present below the exposed lower surface.

[0136] The second undercut structure UC2 can be located within the area where the first undercut structure UC1 is located. In other words, the second undercut structure UC2 can be located in the area where the touch sensor TS is located.

[0137] The touch sensor electrode TSE can be deposited on the exposed upper surface of the first touch contact electrode TCT1 to form the first contact area CTA1, and can be electrically connected to the first touch contact electrode TCT1.

[0138] As described above, the gate GE2 of the sensing transistor SSTR can be connected to the scan line SCANL, and its source SE2 can be connected to the sensing line SSL. Furthermore, the drain DE2 of the sensing transistor SSTR can be connected to the touch sensor electrode TSE of the touch sensor TS. The sensing transistor SSTR can be turned on in response to a scan signal applied through the scan line SCANL. When the sensing transistor SSTR is turned on, the voltage at the touch sensor electrode TSE can be transmitted to the sensing line SSL.

[0139] In addition, each of the multiple touch sensors TS can be connected to the touch bridge wiring TBL via the touch connection section TC, such as Figure 3 and Figure 9 As shown. The touch connection portion TC may overlap the touch sensor TS at least partially at one end and the touch bridge wire TBL at least partially at the other end to connect the touch sensor TS and the touch bridge wire TBL. The touch connection portion TC may include a touch connection line TCL, a resistance sensor RS including a high-resistance area, a connection electrode CTE, and a second touch contact electrode TCT2.

[0140] The touch connection cable TCL can connect the touch bridge cable TBL and the resistance sensor RS. Specifically, one end of the touch connection cable TCL can be connected to the touch bridge cable TBL, and its other end can be connected to the connection electrode CTE through the ninth contact hole CH9 and then connected to the resistance sensor RS through the connection electrode CTE, but this disclosure is not limited thereto. The touch connection cable TCL can also be directly connected to the resistance sensor RS.

[0141] The touch connection line TCL can be disposed in a layer between the first substrate 111 and the driving transistor DTR. In one embodiment, the touch connection line TCL can be in the same layer as the light-shielding layer LS, comprising the same material as the light-shielding layer LS. Since the touch connection line TCL extends from the touch bridge line TBL disposed in the second non-transparent region NTA2 to the resistive sensor RS disposed in the transmissive region TA, the touch connection line TCL necessarily intersects with the first undercut structure UC1. The first undercut structure UC1 can be formed by a wet etching process. In a transparent display panel 110 according to one embodiment of the present disclosure, the touch connection line TCL can be disposed in the same layer as the light-shielding layer LS, thereby preventing the touch connection line TCL from being lost during the wet etching process used to form the first undercut structure UC1.

[0142] The connection electrode CTE electrically connects the touch connection line TCL to the resistance sensor RS. One end of the connection electrode CTE can be connected to the touch connection line TCL through the ninth contact hole CH9, and the other end can be connected to the resistance sensor RS through the tenth contact hole CH10. In one embodiment, the connection electrode CTE can be disposed in the same layer as the source SE1 and drain DE1 of the driving transistor DTR.

[0143] A resistance sensor RS can be positioned between the touch connection line TCL and the second touch contact electrode TCT2, and may include a high-resistance line HRL. One end of the high-resistance line HRL can be connected to the connection electrode CTE through the tenth contact hole CH10, and its other end can be connected to the second touch contact electrode TCT2 through the eleventh contact hole CH11. Although Figure 8 The diagram shows a high-resistance line HRL connected to the touch connection line TCL via a connection electrode CTE, but the high-resistance line HRL is not limited to this. In another embodiment, the high-resistance line HRL can be directly connected to the touch connection line TCL.

[0144] The high-resistance line HRL can be made of silicon-based semiconductor materials or oxide-based semiconductor materials to achieve high resistance. For example, the high-resistance line HRL can include the same material as the active layer ACT1 in the same layer as the driving transistor DTR.

[0145] The second touch contact electrode TCT2 can be disposed in the transmission region TA. The second touch contact electrode TCT2 can be disposed between the high-resistance line HRL and the touch sensor electrode TSE to electrically connect the high-resistance line HRL to the touch sensor electrode TSE. The second touch contact electrode TCT2 can be connected to the high-resistance line HRL through the eleventh contact hole CH11.

[0146] At least a portion of the upper surface of the second touch contact electrode TCT2 can be exposed through the third undercut structure UC3, and the touch sensor electrode TSE can be connected to the exposed upper surface. Specifically, the second touch contact electrode TCT2 can be formed in a layer disposed between the buffer layer BF and the passivation layer PAS. In one embodiment, the second touch contact electrode TCT2 can be disposed between the interlayer dielectric layer ILD and the passivation layer PAS. In this case, the passivation layer PAS can have a third opening region OA3, which is formed to expose at least a portion of the upper surface of the second touch contact electrode TCT2. The third undercut structure UC3 can be formed such that the planarization layer PLN protrudes more than the passivation layer PAS in the third opening region OA3. Therefore, the third undercut structure UC3 can expose at least a portion of the lower surface of the planarization layer PLN and at least a portion of the upper surface of the second touch contact electrode TCT2, while the passivation layer PAS is not present below the exposed lower surface.

[0147] The third undercut structure UC3 can be located within the area where the first undercut structure UC1 is located. In other words, the third undercut structure UC3 can be located in the area where the touch sensor TS is located.

[0148] The touch sensor electrode TSE can be deposited on the exposed upper surface of the second touch contact electrode TCT2 to form the second contact area CTA2, and can be electrically connected to the second touch contact electrode TCT2. The second touch contact electrode TCT2 can transmit the capacitance change of the touch sensor electrode TSE to the touch line TL through the touch connection line TCL, the high resistance line HRL, and the touch bridge line TBL.

[0149] Figure 10 This is a diagram illustrating the current path when a defective touch sensor is present. Figure 11 This is a diagram illustrating multiple sensing lines arranged in multiple touch blocks, and Figure 12 This is a graph illustrating the voltage difference between a normal touch sensor and a defective touch sensor.

[0150] Reference Figures 10 to 12In a transparent display panel 110 according to one embodiment of the present disclosure, a sensing transistor SSTR and a resistance sensor RS can be used to detect a defective touch sensor TS.

[0151] In detail, as described above, particles P may appear in the first undercut structure UC1, and the touch sensor electrode TSE of the touch sensor TS and the cathode electrode CE of the light-emitting element may be electrically connected to each other without separation. In this defective touch sensor TS2-1, when different voltages are applied to the touch line TL and the common power line VSSL, as... Figure 10 As shown, current flows from the touch sensor electrode TSE to the cathode electrode CE.

[0152] For example, a first voltage (e.g., 20V) can be applied to the touch line TL, and a second voltage (e.g., 0V) can be applied to the common power line VSSL. Since the touch sensor electrode TSE is electrically connected to the cathode electrode CE of the light-emitting element, a current path CP can be generated from the touch sensor electrode TSE of the defective touch sensor TS2-1 to the cathode electrode CE. At this time, if a resistive sensor RS is placed on the current path CP, the voltage of the defective touch sensor TS2-1 will decrease due to the high resistance of the resistive sensor RS. On the other hand, since no current flows to the touch sensor electrodes TSE of the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12, the voltage applied from the touch line TL can be maintained in the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12.

[0153] The sensing transistors SSTR, which are connected to multiple touch sensors TS1 and TS2 respectively, can be turned on sequentially according to the scan signals applied through scan lines SCANL[1] and SCANL[2]. When the sensing transistors SSTR are turned on, the voltage of the touch sensor electrode TSE can be applied to the analog-to-digital (AD) converter ADC through the sensing line SSL.

[0154] At this point, multiple sensing lines (SSLs) can individually sense the voltage of multiple touch sensors (TSs). Specifically, each of the multiple touch blocks (TBs) can be configured with multiple sensing lines (SSLs), such as... Figure 11As shown. A touch block TB can be configured with multiple touch sensors TS comprising M rows and N columns, and multiple sensing lines SSLs configured corresponding to the N columns (where M and N are natural numbers greater than 1). Each of the multiple sensing lines SSLs can extend in a first direction (e.g., the Y-axis direction) and connect to the M touch sensors TS arranged in a row in the first direction (e.g., the Y-axis direction). For example, a touch block TB can be configured with multiple touch sensors TS comprising 15 rows and 12 columns, and 12 sensing lines SSLs corresponding to the 12 columns. Each of the 12 sensing lines SSLs can connect to 15 touch sensors arranged in a row in the first direction (e.g., the Y-axis direction). Furthermore, the 12 sensing lines SSLs can extend in the first direction (e.g., the Y-axis direction) and connect to each of the 12 sensing pads SPADs in the pad area PA.

[0155] In other words, multiple sensing lines (SSLs) can be set in a single touch block (TB), and the voltage of the touch sensor (TS) included in the corresponding touch block (TB) can be sensed individually through multiple sensing lines (SSLs).

[0156] Return to reference Figure 10 Since multiple sensing transistors SSTR are sequentially turned on according to the scan signals applied through scan lines SCANL[1] and SCANL[2], each of the multiple sensing lines SSL can sequentially sense the voltage of multiple touch sensors TS1 and TS2 arranged in a row in the first direction (e.g., the Y-axis direction). For example, the first sensing line SSL1 can sequentially sense the voltage of multiple touch sensors TS1-1 and TS2-1 arranged in a row in the first direction (e.g., the Y-axis direction). When a scan signal is applied to the first scan line SCANL[1], the first sensing transistor SSTR1 connected to the first scan line SCANL[1] can be turned on. When the first sensing transistor SSTR1 is turned on, the voltage of the touch sensor electrode TSE of the first touch sensor TS1-1 can be applied through the first sensing transistor SSTR1. At this time, when the first touch sensor TS1-1 is a normal touch sensor, the voltage of the touch sensor electrode TSE of the first touch sensor TS1-1 can be equal to or approximately the first voltage applied to the touch line TL, for example, 20V.

[0157] When a scan signal is applied to the second scan line SCANL[2], the second sensing transistor SSTR2 connected to the second scan line SCANL[2] can be turned on. When the second sensing transistor SSTR2 is turned on, the voltage of the touch sensor electrode TSE of the second touch sensor TS2-1 can be applied through the second sensing transistor SSTR2. At this time, when the second touch sensor TS2-1 is a defective touch sensor TS2-1, since the voltage of the defective touch sensor TS2-1 is reduced due to the high resistance of the resistive sensor RS, the voltage of the touch sensor electrode TSE of the defective touch sensor TS2-1 can have a greater reduction than the first voltage (e.g., 20V) applied to the touch line TL.

[0158] Other sensing lines SSL, including the second sensing line SSL2, can also sense the voltage of a plurality of touch sensors TS1-2, ..., TS1-12, TS2-2, ..., TS2-12 arranged in a row in the first direction (e.g., the Y-axis direction) in the same manner as the first sensing line SSL1.

[0159] An AD converter (ADC) can convert the voltage of the touch sensor electrode TSE into digital sensing data and output the digital sensing data to the defect detection circuit 210 (or defect detector 210). In this case, the defect detector 210 may be a component included in an external circuit board (not shown) or a component included in an external defect detection device.

[0160] The defect detector 210 can detect a defective touch sensor TS2-1 among the multiple touch sensors TS based on the voltage of the multiple touch sensors TS. For example... Figure 12 As shown, the voltage of the defective touch sensor TS2-1 can be a voltage reduced, for example, to 2V or lower, due to the initial voltage (e.g., 20V) applied to the touch line TL and the line resistance of the resistive sensor RS, starting from the initial voltage. On the other hand, as... Figure 12 As shown, the voltages of normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12 can be a first voltage applied to the touch line TL (e.g., 20V), or a voltage slightly reduced due to the line resistance of the touch line TL. The defect detector 210 can detect a touch sensor TS2-1, where the voltage of each of the plurality of touch sensors TS sensed by the multiple sensing lines SSL is lower than a reference value, as a defective touch sensor.

[0161] According to one embodiment of this disclosure, the transparent display panel 110 should include a high-resistance region to generate a voltage difference between the defective touch sensor TS2-1 and the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12. When the resistance is 0Ω, no voltage difference may be generated between the defective touch sensor TS2-1 and the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12, and the defective touch sensor TS2-1 may be difficult to detect. Furthermore, the voltage difference between the defective touch sensor TS2-1 and the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12 may increase with increasing resistance. When comparing the cases with a resistance of 1kΩ and 1MΩ, it is noted that the voltage difference between the defective touch sensor TS2-1 and the normal touch sensors TS1-1, TS1-2, ..., TS1-12, TS2-2, ..., TS2-12 is greater when the resistance R is 1MΩ than when the resistance is 1kΩ. In other words, in the transparent display panel 110 according to one embodiment of this disclosure, the defective touch sensor TS2-1 can be detected more easily as the resistance increases.

[0162] A resistance sensor RS can achieve a resistance of 1kΩ or greater by using a high-resistance wire HRL. However, to achieve a resistance of 1MΩ, the length of the high-resistance wire HRL needs to be increased. Therefore, achieving a resistance of 1MΩ by using a high-resistance wire HRL is not easy, and even if a resistance of 1MΩ is achieved, the high-resistance wire HRL will reduce the transmittance of the transmission region TA.

[0163] According to another embodiment of the present disclosure, the transparent display panel 110 can use transistors instead of resistance sensors RS to achieve high resistance, such as 1MΩ.

[0164] Figure 13 This is a diagram illustrating an example of a resistive transistor used in place of a resistive sensor.

[0165] Reference Figure 13 According to another embodiment of this disclosure, the transparent display panel 110 may include a resistive transistor RTR located between a touch bridge connection TBL and a touch sensor TS. The gate of the resistive transistor RTR may be connected to a separate control signal line CTRL, and its source may be connected to the touch bridge connection TBL. Furthermore, the drain of the resistive transistor RTR may be connected to the touch sensor electrode TSE of the touch sensor TS. The resistive transistor RTR may be turned on or off in response to a control signal applied via the control signal line CTRL. The resistive transistor RTR may have its highest resistance in the off state.

[0166] In a transparent display panel 110 according to another embodiment of the present disclosure, the resistive transistor RTR can be turned off after being turned on and then initialized. In a transparent display panel 110 according to another embodiment of the present disclosure, when the resistive transistor RTR is turned off, the voltage of each of the plurality of touch sensors TS can be sensed by the sensing line SSL.

[0167] Figures 3 to 9 The transparent display panel 110 shown is described as having a sensing transistor SSTR connected to a touch sensor electrode TSE via a first touch contact electrode TCT1 and a resistance sensor RS connected to the touch sensor electrode TSE via a second touch contact electrode TCT2, but is not limited thereto. In another embodiment, the sensing transistor SSTR and the resistance sensor RS can be connected to the touch sensor electrode TSE via the same touch contact electrode.

[0168] Figure 3 The transparent display panel 110 shown includes, but is not limited to, a separate control signal line CTRL for turning the resistive transistor RTR on or off. Figure 14 This is an example Figure 13 A diagram of a modified implementation.

[0169] Reference Figure 14 According to another embodiment of this disclosure, the transparent display panel 110 may include two resistive transistors RTR1 and RTR2 between the touch bridge connection TBL and the touch sensor TS. The first electrode (e.g., drain) of the first resistive transistor RTR1 may be connected to the touch sensor electrode TSE of the touch sensor TS, and its second electrode (e.g., source) may be connected to the second resistive transistor RTR2. Furthermore, the gate of the first resistive transistor RTR1 may be connected to the first electrode. The first electrode (e.g., drain) of the second resistive transistor RTR2 may be connected to the first resistive transistor RTR1, and its second electrode (e.g., source) may be connected to the touch bridge connection TBL. Furthermore, the gate of the second resistive transistor RTR2 may be connected to the first electrode.

[0170] The gates of the first resistor transistor RTR1 and the second resistor transistor RTR2 can be connected to either the source or the drain to have high resistance in the off state without the need for a separate control signal line CTRL. This is because it includes, for example... Figure 14 The transparent display panel 110 shown with the first resistive transistor RTR1 and the second resistive transistor RTR2 does not necessarily include a separate control signal line CTRL, therefore, as shown in the figure... Figure 13 Compared to the transparent display panel 110 shown, which includes a resistive transistor (RTR), the transmissive region TA can be widened to improve light transmittance. Alternatively, including as... Figure 14 The transparent display panel 110 with the first resistive transistor RTR1 and the second resistive transistor RTR2 shown can increase the spacing between signal lines (especially touch line TL), thereby reducing the parasitic capacitance of touch line TL.

[0171] Figure 15 This is an example Figure 3 The diagram shows a modified implementation method, while Figure 16 It is along Figure 15 The cross-sectional view taken from line IV-IV′.

[0172] Reference Figure 15 and Figure 16 In another embodiment of the transparent display panel 110 according to the present disclosure, the sensing transistor SSTR and the resistance sensor RS can be connected to the touch sensor electrode TSE through the same touch contact electrode TCT.

[0173] In detail, the resistance sensor RS may include a high-resistance line HRL. The high-resistance line HRL can be connected to the connection electrode CTE at one end through the tenth contact hole CH10, and can contact the active layer ACT2 of the sensing transistor SSTR at the other end. In this case, the high-resistance line HRL of the resistance sensor RS and the active layer ACT2 of the sensing transistor SSTR are integrated, such that a portion of the resistance sensor RS can be the high-resistance line HRL, while other portions of the resistance sensor RS can be the active layer ACT2 of the sensing transistor SSTR.

[0174] The sensing transistor SSTR may include an active layer ACT2, a gate GE2, a source SE2, and a drain DE2. The active layer ACT2 of the sensing transistor SSTR can be connected to the source SE2 at one end via a seventh contact hole CH7, and to the drain DE2 at the other end via an eighth contact hole CH8. The active layer ACT2 of the sensing transistor SSTR can also be in contact with the high-resistance line HRL of the resistance sensor RS at the other end.

[0175] The source SE2 of the sensing transistor SSTR can be connected to the sensing line SSL at one end through the sixth contact hole CH6, and to the active layer ACT2 at the other end through the seventh contact hole CH7. The drain DE2 of the sensing transistor SSTR can be connected to the active layer ACT2 at one end through the eighth contact hole CH8, and can contact the touch contact electrode TCT at the other end. The drain DE2 of the sensing transistor SSTR and the touch contact electrode TCT can be formed as a single unit.

[0176] The sensing transistor SSTR can be connected to the touch sensor electrode TSE via its drain DE2 and the touch contact electrode TCT. Additionally, the resistive sensor RS can be connected to the touch sensor electrode TSE via the active layer ACT2 and drain DE2 of the sensing transistor SSTR, as well as the touch contact electrode TCT.

[0177] In another embodiment of the transparent display panel 110 according to the present disclosure, the sensing transistor SSTR and the resistive sensor RS can be connected to the touch sensor electrode TSE via a touch contact electrode TCT, thereby reducing the number of touch contact electrodes TCT provided in a single touch sensor TS. Therefore, in the transparent display panel 110 according to another embodiment of the present disclosure, since the area of ​​the electrode pattern provided in the transmissive region TA is reduced, the light transmittance in the transmissive region TA can be improved.

[0178] Figure 17 This diagram illustrates an example of a defective touch sensor appearing in a touch block, while Figure 18A and Figure 18B This is an example of setting in Figure 17 A graph showing the voltage of multiple touch sensors in the touch block.

[0179] In the transparent display panel 110 according to an embodiment of the present disclosure, defective touch sensors TS can be detected in touch blocks TB via touch lines TL. Each touch block TB may include a plurality of touch sensors TS comprising M rows and N columns, and a plurality of sensing lines SSL configured to correspond to the N columns (where M and N are natural numbers greater than 1). Each of the plurality of sensing lines SSL may extend in a first direction (e.g., the Y-axis direction) and connect to the M touch sensors TS. For each of the plurality of touch sensors TS, each touch block TB may also include a sensing transistor SSTR connecting the touch sensor TS to the sensing lines SSL, and a touch connection portion TC connecting the touch sensor TS to touch bridge wires TBL and including a high-resistance region.

[0180] In the transparent display panel 110 according to an embodiment of the present disclosure, a first voltage (e.g., 20V) can be applied to the touch line TL, and a second voltage (e.g., 0V) can be applied to the common power line VSSL. Furthermore, in the transparent display panel 110 according to an embodiment of the present disclosure, the voltage of each of a plurality of touch sensors TS can be sensed by a plurality of sensing lines SSL disposed in the touch block TB.

[0181] For example, the touch block TB may include three short-circuit points SCP1, SCP2, and SCP3, such as Figure 17As shown. In the transparent display panel 110 of this disclosure, the voltage of the touch sensor TS, sensed by the sixth row X6 sensing lines SSL, can be displayed, such as Figure 18A As shown. (Refer to...) Figure 18A The voltage of the touch sensor TS in row 4 (Y4) and row 7 (Y7) can be lower than the voltage of the other touch sensor TS. In this case, the touch sensors in row 4 (Y4) and row 7 (Y7) of the touch sensor TS connected to the sensing line SSL in row 6 (X6) can be defective touch sensors.

[0182] Furthermore, in the transparent display panel 110 according to an embodiment of this disclosure, when a scan signal is applied to the scan line SCANL of the seventh row Y7, the voltage of the touch sensor TS sensed by the multiple sensing lines SSL can be expressed as follows: Figure 18B As shown. (Refer to...) Figure 18B The voltage of the touch sensor TS in the second row X2 and the touch sensor TS in the sixth row X6 can be lower than the voltage of the other touch sensor TS. In this case, the touch sensors in the second row X2 and the sixth row X6 of the touch sensor TS arranged in a row along the scan line SCANL of the seventh row Y7 can be defective touch sensors.

[0183] In the transparent display panel 110 according to an embodiment of the present disclosure, the touch connection line TCL connected to the defective touch sensor TS can be laser-cut, thereby electrically isolating the defective touch sensor TS and the touch bridge connection line TBL from each other. Therefore, the transparent display panel 110 according to another embodiment of the present disclosure can allow other touch sensors TS of the corresponding touch block TB to operate normally.

[0184] In the transparent display panel 110 according to an embodiment of the present disclosure, defective touch sensors TS can be accurately detected in a touch block TB on a pixel-by-pixel basis. Therefore, the transparent display panel 110 according to an embodiment of the present disclosure can reduce the touch defect rate and improve the touch recognition rate.

[0185] Furthermore, in the transparent display panel 110 according to the embodiments of the present disclosure, it is not necessary to detect touch blocks including defective touch sensors TS among the multiple touch blocks TB. That is, the transparent display panel 110 according to the embodiments of the present disclosure does not need to inspect on a per-touch-block basis; the voltage of each of the multiple touch sensors TS can be sensed at once through multiple sensing lines SSL, and defective touch sensors TS can be detected based on the sensed voltage of each of the multiple touch sensors TS. Therefore, the transparent display panel 110 according to the embodiments of the present disclosure can shorten the inspection time.

[0186] Furthermore, in the transparent display panel 110, since the voltage of multiple touch sensors TS is sensed through a separate sensing line SSL, the transparent display panel 110 can be used without affecting the display driver.

[0187] The following beneficial effects can be obtained from this disclosure.

[0188] In this disclosure, the touch sensor electrodes of the touch sensor and the cathode electrodes of the light-emitting element can be formed using an undercut structure, which simplifies the touch process and eliminates the need for a separate mask for the touch sensor electrodes.

[0189] Furthermore, in this disclosure, defective touch sensors can be accurately detected within a single touch block. Therefore, this disclosure can reduce the touch defect rate and improve the touch recognition rate.

[0190] Furthermore, in this disclosure, it is not necessary to inspect touch sensors on a per-touch-block basis. The voltage of each of multiple touch sensors can be sensed simultaneously through multiple sensing lines, and defective touch sensors can be detected based on the sensed voltages. Therefore, in this disclosure, the time required for inspecting defective touch sensors can be reduced.

[0191] It will be apparent to those skilled in the art that this disclosure is not limited to the above-described embodiments and drawings, and that various substitutions, modifications, and variations can be made to this disclosure without departing from its spirit or scope. Therefore, the scope of this disclosure is defined by the appended claims, and all variations or modifications intended to be derived from the meaning, scope, and equivalent concepts of the claims fall within the scope of this disclosure.

Claims

1. A transparent display device with a touch sensor, the transparent display device comprising: Multiple transmission regions and non-transmission regions set between adjacent transmission regions; Multiple touch lines are disposed in the non-transmissive area; as well as Multiple touch blocks, each of which is connected to a plurality of touch lines. Each of the plurality of touch blocks includes: Multiple touch sensors are disposed in the multiple transmissive areas and include M rows and N columns, where M and N are natural numbers greater than 1; Multiple sensing lines, wherein the multiple sensing lines are configured to correspond to the N columns; and Multiple sensing transistors are connected to multiple touch sensors, and the voltage from the connected touch sensors is transmitted to one of the multiple sensing lines. Each of the plurality of touch blocks further includes a plurality of touch connection portions that electrically connect each of the plurality of touch sensors to the touch line and include a high-resistance region.

2. The transparent display device according to claim 1, wherein, Each of the multiple sensing lines is electrically connected to M touch sensors that extend in a first direction and are arranged in a row in the first direction.

3. The transparent display device according to claim 1, further comprising a plurality of scan lines providing scan signals to each of the plurality of sensing transistors. in, Each of the plurality of sensing transistors is electrically connected to one of the plurality of touch sensors and one of the plurality of sensing lines, and when each of the plurality of sensing transistors is turned on in response to the scan signal, it transmits the voltage of the connected touch sensor to the connected sensing line.

4. The transparent display device according to claim 1, wherein, The multiple sensing lines respectively sense the voltage of the multiple touch sensors.

5. The transparent display device according to claim 1, wherein, Each of the plurality of sensing transistors overlaps at least partially with the connected touch sensor.

6. The transparent display device according to claim 1, wherein, The high-resistance region at least partially overlaps with the touch sensor.

7. The transparent display device according to claim 1, wherein, Each of the plurality of touch connection portions includes a resistance sensor in the high-resistance region, the resistance sensor comprising a high-resistance wire made of silicon-based semiconductor material or oxide-based semiconductor material.

8. The transparent display device according to claim 1, wherein, Each of the plurality of touch connection portions includes a resistive transistor in the high-resistance region, the resistive transistor being provided with an active layer, a gate, a source, and a drain.

9. The transparent display device according to claim 8, wherein, The resistive transistor includes a first resistive transistor electrically connected to the touch sensor electrode of the touch sensor and a second resistive transistor electrically connected to the first resistive transistor and one of the plurality of touch lines. In this embodiment, the gate of each of the first and second resistive transistors is electrically connected to the source or drain.

10. The transparent display device according to claim 1, wherein, Each of the plurality of sensing lines is disposed between the plurality of touch lines and the transmissive area.

11. The transparent display device according to claim 1, further comprising a plurality of pixels, including a plurality of sub-pixels, disposed in the non-transmissive region. in, Each of the multiple touch sensors corresponds one-to-one with each of the multiple pixels.

12. The transparent display device according to claim 11, wherein, Each of the plurality of sub-pixels includes a light-emitting element composed of an anode electrode, a light-emitting layer, and a cathode electrode, and each of the plurality of touch sensors includes a touch sensor electrode. The cathode electrode constituting the light-emitting element and the touch sensor electrode constituting the touch sensor are disposed in the same layer.

13. The transparent display device according to claim 12, further comprising a first undercut structure having a planar closed shape disposed in the transmissive region. in, The cathode electrode and the touch sensor electrode are separated from each other by the first undercut structure.

14. The transparent display device according to claim 12, wherein, The touch wire is electrically connected to the touch sensor electrode, and The transparent display device further includes: A common power line is disposed in the non-transmissive region and electrically connected to the cathode electrode; Multiple scan lines, disposed in the non-transmissive region, provide scan signals to the multiple pixels or the multiple sensing transistors; and A defect detector controls the application of a first voltage and a second voltage to the common power line and the touch line, respectively, senses the voltage of each of the plurality of touch sensors through the plurality of sensing lines, and detects defective touch sensors among the plurality of touch sensors based on the sensed voltage.

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