Display device and pen touch system

Abstract

The invention discloses a display device and a pen touch system. The display device includes a display panel configured to display an image, in which the display panel includes: a first substrate including a plurality of transmissive regions allowing light having a first wavelength to be transmissive and a plurality of non-transmissive regions different from the plurality of transmissive regions; a plurality of pixels disposed in the plurality of non-transmissive regions; a code pattern layer in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is disposed, the at least one photoactive pattern being disposed in at least one transmissive region among the plurality of transmissive regions; and a cover window on the plurality of pixels and the code pattern layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0099431 filed in the Korean Intellectual Property Office on July 31, 2023, which is incorporated herein by reference for all purposes as if fully set forth herein. Technical Field

[0003] The present disclosure relates generally to electronic devices having displays, and more particularly to display devices and pen touch systems. Background Art

[0004] With the development of information-oriented society, various demands for display devices for displaying images have increased. Various types of display devices such as liquid crystal display (LCD) devices, organic light emitting diode (OLED) display devices, etc. have been developed and widely used. The display device can be a stand-alone device or integrated with other devices. The display device has been applied to various electronic devices, such as smart phones, digital camera devices, laptop computers, navigation devices, smart TVs, etc.

[0005] In addition, in order to provide a more intuitive use environment, display devices have been increasingly provided with a user interface configured to allow touch input through an object such as a user's body (e.g., finger), a pen, etc. Recently, in order to achieve diversity and more detailed input for operations for various applications, development of display devices with enhanced pen touch capabilities has been progressing. Summary of the invention

[0006] According to an example embodiment of the present disclosure, a display device may be provided, the display device including a display panel configured to display an image. The display panel may include: a first substrate including a plurality of transmission areas that allow light having a first wavelength to be transmitted and a plurality of non-transmission areas different from the plurality of transmission areas; a plurality of pixels arranged in the plurality of non-transmission areas; a code pattern layer, in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is arranged, and the at least one photoactive pattern is arranged in at least one transmission area of ​​the plurality of transmission areas; and a cover window located on the plurality of pixels and the code pattern layer.

[0007] The photoactive material may include one or more of the following: an absorption material capable of absorbing light having a second wavelength; a reflective material capable of reflecting light having a second wavelength; and a radiation material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths.

[0008] According to an example embodiment of the present disclosure, a pen touch system including a display device (which may be, for example, but not limited to, the display device described) and a pen may be provided. As an example, the display device may include: a first substrate including a plurality of transmission areas that allow light having a first wavelength to be transmitted and a plurality of non-transmission areas that are different from the plurality of transmission areas; a plurality of pixels that are arranged in the plurality of non-transmission areas; a code pattern layer, in which at least one photoactive pattern including a photoactive material that responds to light having a second wavelength different from the first wavelength is arranged; and a cover window that is located on the plurality of pixels and the code pattern layer. The pen may be configured to: output light having a second wavelength to at least one of the plurality of transmission areas; receive redirected light from the display device; and output sensing data to the display device based on the redirected light.

[0009] The display device may further include an encapsulation layer. The code pattern layer may be located between the first substrate and the encapsulation layer.

[0010] The plurality of light emitting elements may emit light toward any one of the first substrate and the cover window, and the display device may allow the pen to input through both the front and rear surfaces of the display device based on sensing data received from the pen.

[0011] The plurality of light emitting elements may emit light toward any one of the first substrate and the cover window, and the display device may allow the pen to input through any one of the front and rear surfaces of the display device based on sensing data received from the pen.

[0012] According to one or more aspects of the present disclosure, a display device and a pen touch system capable of more accurately sensing a pen touch based on an optical technology may be provided.

[0013] According to one or more aspects of the present disclosure, a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology may be provided.

[0014] According to one or more aspects of the present disclosure, a transparent display device and a pen touch system capable of providing optical pen touch sensing without affecting a pixel structure for image display may be provided.

[0015] According to one or more aspects of the present disclosure, a transparent display device and a pen touch system that sense a pen touch based on an optical technology without deteriorating transparency may be provided.

[0016] According to one or more aspects of the present disclosure, a display device and a pen touch system including a display panel in which a light control structure enabling a pen to sense a touch is integrated may be provided.

[0017] According to one or more aspects of the present disclosure, a display device and a pen touch system including a display panel in which a light control structure configured not to affect light emitting performance of image display is integrated may be provided.

[0018] According to one or more aspects of the present disclosure, a display device and a pen touch system may be provided, including a display panel in which a reflective structure, an absorption structure (or a radiation structure), and a light control structure configured to implement pen touch sensing are integrated.

[0019] According to one or more aspects of the present disclosure, a display device and a pen touch system capable of enabling pen touch input from any one of a front surface and a rear surface of the display device may be provided.

[0020] According to one or more aspects of the present disclosure, a display device and a pen touch system capable of enabling pen touch input from both the front and rear surfaces of the display device may be provided.

[0021] According to one or more aspects of the present disclosure, a display device and a pen touch system including a display panel in which a light control structure configured to allow a pen to sense touch is integrated, and thereby providing the advantages of reducing the thickness of the display device and helping to simplify the assembly process of the display device. Therefore, one or more aspects of the present disclosure can help reduce weight and optimize the process of the display device.

[0022] According to one or more aspects of the present disclosure, a display device and a pen touch system can be provided, which include a display panel including a pixel array layer and having a reflective structure for pen touch sensing using the pixel array layer, and thereby provide an advantage of further contributing to reducing the weight of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of the present disclosure, and illustrate various aspects of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0024] Figure 1 An example pen touch system according to aspects of the present disclosure is shown;

[0025] Figure 2 An example display device according to aspects of the present disclosure is shown;

[0026] Figure 3A and Figure 3B An example pen according to aspects of the present disclosure is shown;

[0027] Figure 4 An example equivalent circuit of a sub-pixel included in a display device according to aspects of the present disclosure is shown;

[0028] Figure 5 is an example plan view of a display panel according to aspects of the present disclosure;

[0029] Figure 6 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0030] Figure 7 shows an example configuration of a code pattern in a display panel according to aspects of the present disclosure;

[0031] Figure 8 , Fig. 9 and Fig.10 is an example plan view of a display panel in which a plurality of code patterns are disposed in a transmissive region according to aspects of the present disclosure;

[0032] Fig.11 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0033] Fig.12 and Fig.13 The present disclosure shows various aspects of the Fig.11 An example scheme for forming a code pattern in a display panel;

[0034] Fig.14 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0035] Fig.15 and Fig.16 The present disclosure shows various aspects of the Fig.14 An example scheme for forming a code pattern in a display panel;

[0036] Fig.17 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0037] Fig.18 and Fig.19 The present disclosure shows various aspects of the Fig.17 An example scheme for forming a code pattern in a display panel;

[0038] Fig. 20 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0039] Fig.21 is an example plan view of a display panel in which a plurality of code patterns are disposed in a transmissive region according to aspects of the present disclosure;

[0040] Fig. 22 , Fig.23 and Fig.24 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0041] Fig.25 is an example plan view of a display panel in which a plurality of code patterns are disposed in a transmissive region according to aspects of the present disclosure;

[0042] Fig.26 shows example light transmission spectra of color filters provided in a display panel according to aspects of the present disclosure;

[0043] Fig. 27 , Fig.28 , Fig.29 and Fig.30 It is for Fig.11 , Fig.14 , Fig.17 and Fig. 20 A more detailed example cross-sectional view of the configuration of the display panel is shown;

[0044] Fig.31 and Fig.32 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0045] Fig.33 is an example plan view of a display panel in which a plurality of code patterns are disposed in a transmissive region according to aspects of the present disclosure;

[0046] Fig.34 and Fig.35 It is for Fig.31 and 32 A more detailed example cross-sectional view of the configuration of the display panel is shown;

[0047] Fig.36 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0048] Fig.37 is an example plan view of a display panel in which a plurality of code patterns are provided in a transmissive region according to aspects of the present disclosure; and

[0049] Fig.38 It is for Fig.36 A more detailed cross-sectional view of the configuration of the display panel is shown. DETAILED DESCRIPTION

[0050] Reference will now be made in detail to the example embodiments of the present disclosure, examples of which may be shown in the accompanying drawings. In the following description, unless otherwise specified, the structures, embodiments, implementations, methods and operations described herein are not limited to one or more specific examples set forth herein, and may be changed as known in the art. Unless otherwise specified, the same reference numerals always represent the same elements. The names of the various elements used in the following description are selected only for the convenience of writing the specification, and therefore may be different from those used in the actual product. The advantages and features of the present disclosure and its implementation methods will be illustrated by the example embodiments described below with reference to the accompanying drawings. However, the present disclosure may be implemented in different forms and should not be interpreted as being limited to the example embodiments set forth herein. Instead, these example embodiments are provided so that the present disclosure may be sufficiently thorough and complete to help those skilled in the art fully understand the scope of the present disclosure. In addition, the scope of protection of the present disclosure is defined by the claims and their equivalents. In the following description, in the case where a detailed description of a related known function or configuration may unnecessarily obscure various aspects of the present disclosure, a detailed description of such a known function or configuration may be omitted.

[0051] The shapes, sizes, ratios, angles, numbers, etc. of various example embodiments used to describe the present disclosure shown in the accompanying drawings are given by way of example only. Therefore, the present disclosure is not limited to the illustrations in the accompanying drawings. Where the terms "comprise", "have", "include", "contain", "compose", "form", "form", etc. are used, one or more other elements may be added unless a term such as "only" is used. Unless the context clearly indicates otherwise, an element described in the singular is intended to include a plurality of elements, and vice versa.

[0052] Although the terms "first", "second", "A", "B", "(a)" or "(b)", etc. may be used herein to describe various elements, these elements should not be construed as limited by these terms because they are not used to define a particular order or priority. These terms are only used to distinguish one element from another; therefore, the related elements should not be construed as limited by these terms because these terms are not used to define a particular order or priority.

[0053] In addition, the expression of the first element, the second element "and / or" the third element should be understood as one of the first element, the second element and the third element, or as any or all combinations of the first element, the second element and the third element. By way of example, A, B and / or C can refer to only A, only B or only C; any or some combinations of A, B and C; or all of A, B and C.

[0054] For the expression that an element or layer is “connected”, “coupled” or “attached” to another element or layer, the element or layer may be not only directly connected, coupled or attached to another element or layer, but may also be indirectly connected, coupled or attached to another element or layer by using one or more intervening elements or layers “disposed” or “inserted” between the elements or layers, unless otherwise specified. In addition, another element may be included in one or more of two or more elements that are connected, combined, coupled or contacted to each other.

[0055] When an element or layer is “contacted” or “overlapped” with another element or layer, the element or layer may not only be directly in contact with, overlapped with, etc., but may also be indirectly in contact with, overlapped with, etc., with another element or layer with one or more intermediate elements or layers “disposed” or “interposed” between the elements or layers, unless otherwise specified.

[0056] In the case of describing a positional relationship, for example, when using "on", "above", "below", "above", "below", "beside", "next to", etc. to describe the positional relationship between two components, unless more restrictive terms such as "immediately", "directly" or "adjacent" are used, one or more other components may be located between the two components. For example, in the case where an element or layer is disposed "on" another element or layer, a third element or layer may be interposed therebetween. In addition, the terms "left", "right", "top", "bottom", "downward", "upward", "up", "down", etc. refer to an arbitrary reference system.

[0057] In describing a temporal relationship, when the temporal order is described as, for example, "after", "subsequently", "next", or "before", discontinuous cases may be included unless more restrictive terms such as "just", "immediately", or "directly" are used.

[0058] When explaining an element, even if no explicit description of the error or tolerance range is provided, the element will be interpreted as including such error or tolerance range. In addition, the term "may" fully includes all meanings of the term "can".

[0059] The term "at least one" should be understood to include any or all combinations of one or more of the associated listed items. For example, the meaning of "at least one of a first element, a second element, and a third element" covers the combination of all three listed elements, the combination of any two of the three elements, and each individual element - the first element, the second element, and the third element.

[0060] The expression of the first element, the second element “and / or” the third element should be understood as one of the first element, the second element, and the third element or as any or all combinations of the first element, the second element, and the third element. By way of example, A, B, and / or C may refer to only A, only B, or only C; any or some combination of A, B, and C; or all of A, B, and C.

[0061] Hereinafter, various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, for ease of description, the proportion of each of the elements shown in the accompanying drawings may be different from the actual proportion. Therefore, the elements shown are not limited to the specific proportions they are shown in the accompanying drawings.

[0062] Figure 1 An example pen touch system 10 is shown in accordance with aspects of the present disclosure.

[0063] Reference Figure 1 In one or more example embodiments, the pen touch system 10 may identify whether a touch is applied by a touch object and / or the position of the touch (or touch coordinates). Thereafter, the pen touch system 10 may obtain touch event information according to the applied touch and / or the touch position, and thereafter, display an image (e.g., a still image or a video image) corresponding to the obtained touch event information or the touch position on the screen, or perform an action corresponding to the obtained touch event information or the touch position.

[0064] Reference Figure 1 In one or more example embodiments, the pen touch system 10 may include a display device 100 and a pen 110 .

[0065] For example, the touch object detectable by the pen touch system 10 may basically include the pen 110, and may also include a finger, etc. The touch event information may be information indicating that a touch has occurred, and may also be information about a touch type such as a tap type (which may also be referred to as a click type), a double-click type, a drag-and-drop type, a touch-hold type, etc.

[0066] Reference Figure 1In one or more aspects, the pen touch system 10 may recognize (or detect or sense) a touch of the pen 110 based on an optical technology. In one or more aspects, the pen touch system 10 may perform pen touch sensing based on such an optical technology using light having one or more wavelengths included in a specific wavelength band (hereinafter, it may be referred to as optical pen touch sensing).

[0067] One or more wavelengths of light emitted from a light-emitting element for image display may be included in a first band (e.g., a visible light band). One or more wavelengths of light used for optical pen touch sensing may be included in a second band as a specific band. In this article, one or more wavelengths of light emitted from a light-emitting element for image display are referred to as a first wavelength, which is included in the first band. In addition, one or more wavelengths of light used for pen touch sensing are referred to as a second wavelength, which is included in the second band.

[0068] The specific wavelength band for optical pen touch sensing may be different from the first wavelength band (e.g., visible light band) including one or more wavelengths of light emitted from the light emitting element for image display. Therefore, the second wavelength included in the second wavelength band as the specific wavelength band for optical pen touch sensing may be different from the first wavelength included in the first wavelength band (e.g., visible light band).

[0069] For example, the second band may be an infrared band. The light having the second wavelength may be an infrared light having one or more wavelengths (the second wavelength) included in the infrared band (e.g., a wavelength range of about 780nm to 1000μm). In another example, the second band may be an ultraviolet band. The light having the second wavelength may be an ultraviolet light having one or more wavelengths (the second wavelength) included in the ultraviolet band (e.g., a wavelength range of about 10nm to 397μm). One or more example embodiments of the present disclosure are not limited thereto. For example, the light having the second wavelength may be an electromagnetic wave having various wavelengths. Hereinafter, for ease of explanation, a discussion is provided based on an example in which the first band is a visible light band, the second band is an infrared band, the first wavelength is one or more visible light wavelengths, and the second wavelength is one or more infrared wavelengths. Therefore, it is assumed that the light having the first wavelength is visible light (including red light, green light, blue light, etc.), and the light having the second wavelength is infrared light.

[0070] For example, an infrared band (e.g., approximately 780 nm to 1000 μm) can be classified into a near infrared band (e.g., 750 nm to 3 μm), a mid-infrared band (e.g., 3 μm to 25 μm), and a far infrared band (e.g., 25 μm to 1000 μm). In this example, the second wavelength may be included in the near infrared band, or may also be included in the mid-infrared band or the far infrared band. For example, the second band for optical pen touch sensing may be an infrared band (e.g., 780 nm to 1000 μm), or may include one or more of a near infrared band (e.g., 750 nm to 3 μm), a mid-infrared band (e.g., 3 μm to 25 μm), and a far infrared band (e.g., 25 μm to 1000 μm).

[0071] In one or more aspects, the pen 110 of the pen touch system 10 may perform a light output function, a light receiving function, a touch sensing function, a communication function, and the like.

[0072] The pen 110 may output light having a second wavelength as a light output function.

[0073] Depending on the internal structure of the display device 100, a portion of the light with the second wavelength output from the pen 110 may be absorbed inside the display device 100, and another portion of the light with the second wavelength output from the pen 110 may be reflected or converted inside the display device 100 into light with one or more other wavelengths and redirected or radiated to move to the outside of the display device 100.

[0074] As a light receiving function, the pen 110 may receive light that is redirected to move to the outside of the display device 100 in the form of light having a second wavelength or light having one or more other wavelengths after being reflected or converted into light having one or more other wavelengths different from the second wavelength inside the display device 100 (hereinafter, the light may be referred to as redirected light). In addition, as a touch sensing function, the pen 110 may sense whether a touch (e.g., a touch input) has been applied and / or the position of the touch (touch coordinates) based on information about the distribution, chromaticity difference, and / or wavelength difference of the redirected light detected based on the received redirected light. In this document, after the light having a second wavelength is output by the pen 110 to the display device 100, in the case where the light having the second wavelength is reflected or converted into light having one or more other wavelengths inside the display device 100, and the light having the second wavelength or the light having one or more other wavelengths is redirected to move to the outside of the display device 100, the light having the second wavelength or the light having one or more other wavelengths that is redirected to move to the outside of the display device 100 is referred to as redirected light. Herein, the redirected light may be, for example, reflected light, which means that among the light having the second wavelength emitted from the pen 110, some of the light is reflected inside the display device 100 after being incident on the display device 100 and redirected to move to the outside of the display device 100. In addition, the redirected light may be, for example, radiated light, which means that among the light having the second wavelength emitted from the pen 110, some of the light is converted into light having one or more other wavelengths inside the display device 100 after being incident on the display device 100 and is radiated in the form of light having one or more other wavelengths to move to the outside of the display device 100.

[0075] As a communication function, the pen 110 can communicate with the display device 100 through a predetermined communication method, and send sensing data including whether a touch or touch input is applied and / or a touched position to the display device 100. For example, the sensing data may include touch event information and / or touch coordinate data. For example, the touch event information may be information indicating that a touch has occurred, or may be information about a touch type such as a tap type (click type), a double-click type, a drag-and-drop type, a touch hold type, etc. The touch coordinate data may be information about the coordinates of the touch position.

[0076] As described above, depending on the internal structure of the display device 100, a portion of the light with the second wavelength output from the pen 110 may be absorbed or converted into light with one or more other wavelengths inside the display device 100 and radiated in the form of light with one or more other wavelengths to move to the outside of the display device 100, and another portion of the light with the second wavelength output from the pen 110 may be reflected at the inside of the display device 100 and redirected again to move to the outside of the display device 100.

[0077] In the following, in one or more example embodiments, reference is made to Figure 2 , Figure 3A and Figure 3B The display device 100 and the pen 110 included in the pen touch system 10 are described in more detail.

[0078] Figure 2 An example display device 100 is shown in accordance with aspects of the present disclosure. Figure 3A and Figure 3B An example pen 110 is shown in accordance with aspects of the present disclosure.

[0079] Reference Figure 2 In one or more example embodiments, the display device 100 may include a display panel 210 and a display driving circuit as components for displaying an image. The display driving circuit may be a circuit for driving the display panel 210, and includes a data driving circuit 220, a gate driving circuit 230, and a controller 240. In one or more aspects, the display driving circuit may further include a host system 250.

[0080] The display panel 210 may include a first substrate 211 , a plurality of sub-pixels SP disposed on the first substrate 211 , and various types of signal lines disposed on the first substrate 211 and configured to drive the plurality of sub-pixels SP.

[0081] The first substrate 211 may include a display area DA where a plurality of sub-pixels SP are disposed and a non-display area NDA located outside the display area DA.

[0082] The non-display area NDA may include a pad area to which the data driving circuit 220 is connected. For example, the pad area may be located in the display area DA along a first direction. The first direction may be, for example, a column direction or a row direction.

[0083] The non-display area NDA may have a minimum size that allows only a pad area and the like to be included. In one or more aspects, the non-display area NDA of the display panel 210 may have a very small area. For example, even when the display panel 210 has the non-display area NDA, the boundary area between the display area DA and the non-display area NDA may be curved, and thus the non-display area NDA may be located below the display area DA. In this example, when a user views the display device 100 in front of the display device 100, all or most of the non-display area NDA may not be visible to the user.

[0084] In one or more aspects, the display device 100 may be a liquid crystal display device or the like, or a self-luminous display device in which light is emitted from the display panel 210 itself. In an example where the display device 100 is a self-luminous display device, each of the plurality of sub-pixels SP may include a light emitting element ED.

[0085] For example, the display device 100 according to various aspects of the present disclosure may be an organic light-emitting display device in which the light-emitting element ED is implemented using an organic light-emitting diode (OLED). In another example, the display device 100 according to various aspects of the present disclosure may be an inorganic light-emitting display device in which the light-emitting element ED is implemented using a light-emitting diode based on an inorganic material. In yet another example, the display device 100 according to various aspects of the present disclosure may be a quantum dot display device implemented using quantum dots as the light-emitting element ED, where the quantum dot is a self-luminous semiconductor crystal.

[0086] The structure of each of the plurality of subpixels SP may depend on the type of the display device 100. For example, when the display device 100 is a self-luminous display device including self-luminous subpixels SP, each subpixel SP may include a self-luminous light emitting element ED and a subpixel circuit SPC configured to drive the light emitting element ED.

[0087] The various types of signal lines may include, for example, a plurality of data lines DL for carrying data signals (which may be referred to as data voltages or image signals), a plurality of gate lines GL for carrying gate signals (which may be referred to as scan signals), etc. The various types of signal lines may also include at least one signal line for delivering a display driving voltage (e.g., a common voltage) different from the data signal and the gate signal.

[0088] In one or more aspects, a plurality of data lines DL and a plurality of gate lines GL may intersect each other. Each of the plurality of data lines DL may be configured to extend in a first direction, and each of the plurality of gate lines GL may be configured to extend in a second direction. For example, the first direction may be a column or a vertical direction, and the second direction may be a row or a horizontal direction. In another example, the first direction may be a row or a horizontal direction, and the second direction may be a column or a vertical direction. Hereinafter, a discussion is provided based on an example in which the first direction is a column direction and the second direction is a row direction.

[0089] The data driving circuit 220 may be a circuit for driving the plurality of data lines DL, and may output data signals to the plurality of data lines DL.

[0090] The data driving circuit 220 may receive image data DATA in a digital form from the controller 240 , convert the received image data DATA into a data signal in an analog form, and output the resulting data signal to a plurality of data lines DL.

[0091] In one or more aspects, the data driving circuit 220 can be connected to the display panel 210 via tape automated bonding (TAB) technology, or connected to a conductive pad of the display panel 210, such as a bonding pad, via a chip on glass (COG) technology or a chip on panel (COP) technology, or connected to the display panel 210 via a chip on film (COF) technology.

[0092] The data driving circuit 220 may be disposed outside the display area DA of the display panel 210 , or may be disposed in the display area DA of the display panel 210 .

[0093] The gate driving circuit 230 may be a circuit for driving the plurality of gate lines GL, and may output gate signals to the plurality of gate lines GL.

[0094] The gate driving circuit 230 can receive various types of gate driving control signals GCS, and can also receive a first gate voltage corresponding to an on-level voltage and a second gate voltage corresponding to an off-level voltage. Thus, the gate driving circuit 230 can generate a gate signal and supply the generated gate signal to a plurality of gate lines GL.

[0095] In one or more aspects, the gate driving circuit 230 included in the display device 100 may be disposed in the non-display area NDA. In one or more aspects, the gate driving circuit 230 may be configured to overlap with the display area DA of the display panel 210. For example, the gate driving circuit 230 may be disposed in the entire display area DA, or may be disposed only in a portion of the display area DA (e.g., one or more of the two side edges). In an example where the gate driving circuit 230 is configured to overlap with the display area DA, the gate driving circuit 230 may be configured not to overlap with the sub-pixels SP, or may be configured to overlap with one or more or all of the sub-pixels SP.

[0096] In one or more aspects, the gate driving circuit 230 included in the display device 100 can be embedded in the display panel 210 through the gate-in-panel (GIP) technology. In an example where the gate driving circuit 230 is implemented through the gate-in-panel (GIP) technology, the gate driving circuit 230 can be disposed on the first substrate 211 of the display panel 210 during the manufacturing process of the display panel 210 or the display device 100.

[0097] The controller 240 may be a device configured to receive image data and various display driving control signals from the host system 250 , supply image data corresponding to the received image signal to the data driving circuit 220 , and control the data driving circuit 220 and the gate driving circuit 230 .

[0098] The controller 240 can generate at least one data driving control signal DCS for controlling data driving and at least one gate driving control signal GCS for controlling gate driving by using display control signals (e.g., vertical synchronization signal, horizontal synchronization signal, data enable signal, clock signal, etc.) received from the host system 250.

[0099] The controller 240 may control the operation and driving timing of the data driving circuit 220 by supplying at least one data driving control signal DCS to the data driving circuit 220 .

[0100] The controller 240 may control the operation and driving timing of the gate driving circuit 230 by supplying at least one gate driving control signal GCS to the gate driving circuit 230 .

[0101] The controller 240 may receive image data input from the host system 250 , and supply image data DATA that can be read by the data driving circuit 220 to the data driving circuit 220 based on the input image data.

[0102] The controller 240 may be implemented in a separate component from the data driving circuit 220 or integrated with the data driving circuit 220 such that the controller 240 and the data driving circuit 220 may be implemented in a single integrated circuit.

[0103] The controller 240 may be a timing controller used in display technology, or a control device capable of additionally performing other control functions in addition to the functions of the timing controller. In one or more aspects, the controller 240 may be one or more other control circuits different from the timing controller, or a circuit or component in the control device. The controller 240 may be implemented using various circuits or electronic components such as an integrated circuit (IC), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a processor, etc.

[0104] The controller 240 may be mounted on a printed circuit board, a flexible printed circuit, or the like, and may be electrically connected to the data driving circuit 220 and the gate driving circuit 230 through the printed circuit board, the flexible printed circuit, or the like.

[0105] The controller 240 may send and receive signals to and from the data driving circuit 220 via one or more predetermined interfaces. For example, such interfaces may include a low voltage differential signaling (LVDS) interface, an embedded clock point-to-point interface (EPI), a serial peripheral interface (SPI), and the like.

[0106] In one or more aspects, in order to provide a touch sensing function as well as an image display function, the display device 100 may include a touch sensor and a touch sensing circuit.

[0107] The touch sensing circuit can detect whether a touch (eg, finger touch or pen touch) has been applied by a touch object such as a finger, pen 110, etc. or detect a touched position by sensing the touch sensor. This touch sensing may be a touch sensing scheme different from optical pen touch sensing.

[0108] For example, the touch sensing circuit may include a touch driving circuit configured to drive and sense the touch sensor and generate and output touch sensing data, and a touch controller configured to detect application of a touch or a touch position using the touch sensing data.

[0109] The touch sensor may include a plurality of sensor electrodes. The touch sensor may also be referred to as a touch panel or a touch screen panel. The touch sensor may be an external touch sensor configured to be located outside the display panel 210 or an internal touch sensor configured to be located inside the display panel 210.

[0110] The display device 100 may further include a power supply circuit for supplying various types of power to the display driving circuit.

[0111] In some embodiments, the display device 100 may be a mobile terminal such as a smart phone, a tablet computer, or the like, or a monitor, a television (TV), or the like. Such a device may be configured in various types, sizes, and shapes. The display device 100 according to various aspects of the present disclosure is not limited thereto, and may include various types, sizes, and shapes configured to display information or images.

[0112] Reference Figure 2 In an example where the display device 100 according to aspects of the present disclosure is a self-luminous display device, each of the plurality of sub-pixels SP may include a light emitting element ED and a sub-pixel circuit SPC for driving the light emitting element ED.

[0113] The sub-pixel circuit SPC may include a plurality of pixel driving transistors for driving the light emitting element ED and at least one capacitor.

[0114] The sub-pixel circuit SPC may be connected to the data line DL, the gate line GL, the first driving voltage line DVL, and the second driving voltage line BVL.

[0115] The plurality of pixel driving transistors may include a driving transistor DRT and a scanning transistor SCT, wherein the driving transistor DRT is configured to actually drive the light emitting element ED by supplying a driving current to the light emitting element ED, and the scanning transistor SCT is configured to allow the data signal VDATA to be passed to the second node N2, which is the gate node of the driving transistor DRT.

[0116] The at least one capacitor may include a storage capacitor Cst configured to maintain a constant voltage during a display frame or during a certain period of the display frame.

[0117] In order to drive one or more sub-pixels SP, at least one data signal VDATA as an image signal and at least one scan signal SC as a gate signal may be applied to the one or more sub-pixels SP. In addition, in order to drive one or more sub-pixels SP, a common driving voltage including a first driving voltage VDD and a second driving voltage VSS may be applied to the sub-pixels SP.

[0118] The light emitting element ED may include a pixel electrode PE, an element intermediate layer EL, and a common electrode CE. The pixel electrode PE may be an electrode disposed in each sub-pixel SP, and the common electrode CE may be an electrode commonly disposed in all or some of the plurality of sub-pixels SP. The element intermediate layer EL may be a layer disposed between the pixel electrode PE and the common electrode CE, and may include a light emitting layer EML.

[0119] In an example where the light emitting element ED is an organic light emitting element such as an organic light emitting diode (OLED), the element intermediate layer EL may include a light emitting layer EML, a first common layer CL1 between the pixel electrode PE and the light emitting layer EML, and a second common layer CL2 between the light emitting layer EML and the common electrode CE. The light emitting layer EML may be disposed in each sub-pixel SP, and the first common layer CL1 and the second common layer CL2 may be disposed together in all or some of the plurality of sub-pixels SP. The light emitting layer EML may be disposed in each light emitting region. The first common layer CL1 and the second common layer CL2 may be disposed in the corresponding light emitting regions of all or some of the plurality of sub-pixels SP, and further extend to the non-light emitting region. Each light emitting element ED may be configured by a portion in which the corresponding pixel electrode PE, the corresponding light emitting layer EML, the respective corresponding portions of the first common layer CL1 and the second common layer CL2, and the corresponding portion of the common electrode CE overlap with each other. The corresponding light emitting region may be formed by each light emitting element ED. That is, the corresponding light emitting region of each light emitting element ED may include a region in which the corresponding pixel electrode PE, the corresponding element intermediate layer EL, and the common electrode CE overlap with each other.

[0120] For example, the pixel electrode PE may be an anode, and the common electrode CE may be a cathode. In another example, the pixel electrode PE may be a cathode, and the common electrode CE may be an anode.

[0121] For example, the common electrode CE may be electrically connected to the second driving voltage line BVL. A second driving voltage VSS as a type of common driving voltage may be applied to the common electrode CE through the second driving voltage line BVL. The pixel electrode PE may be electrically connected to one node (e.g., the first node N1 of the driving transistor DRT) of a transistor included in a corresponding sub-pixel circuit SPC of each sub-pixel SP.

[0122] The driving transistor DRT may be a transistor configured to supply a driving current to the light emitting element ED. The driving transistor DRT may be connected between the first driving voltage line DVL and the light emitting element ED.

[0123] The driving transistor DRT may include a first node N1 electrically connected to the light emitting element ED, a second node N2 to which the data signal VDATA is applied, and a third node N3 to which the driving voltage VDD is applied through the first driving voltage line DVL.

[0124] In the driving transistor DRT, the second node N2 may be a gate node, the first node N1 may be a source node or a drain node, and the third node N3 may be a drain node or a source node. Hereinafter, for ease of explanation only, a discussion may be provided based on an example in which the first node, the second node, and the third node (N1, N2, and N3) of the driving transistor DRT are source nodes, gate nodes, and drain nodes, respectively. However, example embodiments of the present disclosure are not limited thereto.

[0125] The scanning transistor ST may be a switching transistor for allowing the data signal VDATA, which is an image signal, to be transferred to the second node N2, which is a gate node of the driving transistor DT.

[0126] The scanning transistor SCT may be turned on or off by a scanning signal SC as a type of gate signal carried by a scanning line SCL as a type of gate line GL, and controls the electrical connection between the second node N2 of the driving transistor DRT and the data line DL. A drain electrode or a source electrode of the scanning transistor SCT may be electrically connected to the data line DL. A source electrode or a drain electrode of the scanning transistor SCT may be electrically connected to the second node N2 of the driving transistor DRT. A gate electrode of the scanning transistor SCT may be electrically connected to the scanning line SCL.

[0127] The storage capacitor Cst may be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT. The storage capacitor Cst may include a first capacitor electrode electrically connected to or corresponding to the first node N1 of the driving transistor DRT, and a second capacitor electrode electrically connected to or corresponding to the second node N2 of the driving transistor DRT.

[0128] Each of the driving transistor DRT and the scanning transistor SCT may be an n-type transistor or a p-type transistor.

[0129] For example, at least a portion of the sub-pixel circuit SPC may overlap at least a portion of the light emitting element ED in the vertical direction. In another example, the sub-pixel circuit SPC may not overlap the light emitting element ED in the vertical direction.

[0130] like Figure 2As shown, the sub-pixel circuit SPC may include two transistors (2T: T1 and T2) and a capacitor (1C: Cst) (which may be referred to as a "2T1C structure"), and in some implementations, may also include one or more transistors, or may also include one or more capacitors.

[0131] The type and number of gate signals supplied to the sub-pixels SP and / or the type and number of gate lines connected to the sub-pixels SP may vary according to the structure of the corresponding sub-pixel circuit SPC. In addition, the type and number of common driving voltages supplied to the sub-pixels SP may vary according to the structure of the corresponding sub-pixel circuit SPC.

[0132] Since the circuit element (e.g., light emitting element ED, such as an organic light emitting diode (OLED) including an organic material) in each sub-pixel SP is easily affected by external moisture or oxygen, an encapsulation layer may be provided at the display panel 210 to prevent external moisture or oxygen from penetrating into the circuit element (e.g., light emitting element ED). The encapsulation layer may be provided in various shapes or configurations to prevent the light emitting element ED from contacting moisture or oxygen.

[0133] Reference Figure 2 In one or more aspects, the display device 100 may include a communication module 260 for communicating with the pen 110 .

[0134] The communication module 260 of the display device 100 may receive sensing data (eg, touch event information and / or touch coordinate data) from the pen 110. For example, the communication module 260 may include a hardware module and a software module for communication.

[0135] Reference Figure 2 , the host system 250 or the controller 240 may determine the touch position based on the sensing data received by the communication module 260, and perform an operation corresponding to the determined touch position. For example, the host system 250 or the controller 240 may perform an operation of selecting an object (e.g., an icon, etc.) displayed at the touch position, and supply input image data for displaying an image to be presented according to the selection of the object on the display panel 210 to the controller 240 or the data driving circuit 220. In another example, the host system 250 or the controller 240 may perform an operation of selecting an object (e.g., an icon, etc.) displayed at the touch position, and execute an application corresponding to the selected object.

[0136] Reference Figure 3A and Figure 3BIn one or more example embodiments, the pen 110 included in the pen touch system 10 may include a light emitting device 310 , a light receiving sensor 320 , a control processor 340 , a communication device 350 , a pen tip 360 , and a housing 380 .

[0137] The pen tip 360 may be an element for contacting the display device 100 .

[0138] The light emitting device 310 may emit light having a second wavelength. For example, the light having the second wavelength may be infrared light. In this example, the light emitting device 310 may include an infrared light emitting diode package.

[0139] The light receiving sensor 320 may receive and sense the redirected light from the display panel 211. The redirected light from the display panel 211 may be light that has been reflected inside the display panel 211, among the light having the second wavelength emitted from the light emitting device 310. For example, the light receiving sensor 320 may be implemented with a complementary metal oxide semiconductor (CMOS). The light receiving sensor 320 may also be referred to as an image sensor or a camera. In an example where the light having the second wavelength emitted from the light emitting device 310 is infrared light, the light receiving sensor 320 (which may also be referred to as an infrared image sensor or an infrared camera) may receive and sense the redirected light from the display panel 211 and generate an infrared image.

[0140] The control processor 340 may control and manage the overall operation and state of the pen 110, and may control the operations of the light emitting device 310, the light receiving sensor 320, and the communication device 350. The control processor 340 may generate sensing data by determining whether a touch is applied and / or the position of the touch based on the distribution, chromaticity difference, or wavelength difference of the redirected light received and sensed by the light receiving sensor 320.

[0141] The communication device 350 may communicate with the communication module 260 of the display device 110. The communication device 350 may send the sensing data (e.g., touch event information and / or touch coordinate data) generated by the control processor 340 to the communication module 260 of the display device 100. For example, the communication device 350 may include a hardware module and a software module for short-range wireless communication. For example, the short-range wireless communication may include Bluetooth, wireless LAN, etc.

[0142] The communication device 350 of the pen 110 and the communication module 260 of the display device 100 may communicate according to a predetermined communication protocol.

[0143] In one or more aspects, the pen 110 may further include a pressure sensor 330 for detecting the pressure of the pen tip 360 pressing the display device 100. The pressure sensor 330 may be connected to a portion of the pen tip 360 and may detect the pressure of the pen tip 360 pressing the display device 100.

[0144] The housing 380 may accommodate the light emitting device 310 , the light receiving sensor 320 , the pressure sensor 330 , the control processor 340 , the communication device 350 , and the pen tip 360 .

[0145] In one or more aspects, the pen 110 may include a power source such as a battery 370 for supplying power to the light emitting device 310, the light receiving sensor 320, the pressure sensor 330, the control processor 340, the communication device 350, etc. The battery 370 may be a wired or wireless rechargeable battery.

[0146] The housing 380 may accommodate the light emitting device 310 , the light receiving sensor 320 , the pressure sensor 330 , the control processor 340 , the communication device 350 , and the pen tip 360 .

[0147] Figure 4 An example equivalent circuit of a sub-pixel SP included in the display device 100 according to aspects of the present disclosure is shown.

[0148] Reference Figure 4 , each of the plurality of sub-pixels SP may include a light emitting element ED and a sub-pixel circuit SPC configured to drive the light emitting element ED. Figure 2 Compared with the sub-pixel circuit SPC of the sub-pixel SP shown, Figure 4 The sub-pixel circuit SPC of the sub-pixel SP shown may also include a sensing transistor SENT. Figure 2 The different characteristics of the sub-pixels SP provide information about Figure 4 Therefore, for the sake of discussion, the discussion of the sub-pixel SP is omitted. Figure 2 The same characteristics of the sub-pixel SP are discussed.

[0149] Reference Figure 4 , the sub-pixel circuit SPC may be connected to the data line DL, the gate line GL, the first driving voltage line DVL, the second driving voltage line BVL, and the reference voltage line RVL.

[0150] The plurality of pixel driving transistors may further include a sensing transistor SENT in addition to the driving transistor DRT and the scanning transistor SCT.

[0151] The sensing transistor SENT may be a transistor for controlling a voltage state of the first node N1 of the driving transistor DRT, and is connected between the first node N1 of the driving transistor DRT and a reference voltage line RVL.

[0152] The sensing transistor SENT can be turned on or off by a sensing signal SE as another type of gate signal applied through a sensing line SENL as another type of gate line GL, and controls the electrical connection between the first node N1 of the driving transistor DRT and a reference voltage line RVL through which a reference voltage VREF is delivered.

[0153] A drain electrode or a source electrode of the sensing transistor SENT may be electrically connected to the reference voltage line RVL. A source electrode or a drain electrode of the sensing transistor SENT may be connected to the first node N1 of the driving transistor DRT, and a gate electrode of the sensing transistor SENT may be electrically connected to the sensing line SENL.

[0154] Reference Figure 4 , the scan signal SC may be referred to as a first scan signal, and the sensing signal SE may be referred to as a second scan signal. In this implementation, the scan transistor SCT may be referred to as a first scan transistor, and the sensing transistor SENT may be referred to as a second scan transistor.

[0155] Each of the driving transistor DRT, the scanning transistor SCT, and the sensing transistor SENT may be an n-type transistor or a p-type transistor.

[0156] In one or more aspects, each of the plurality of sub-pixels SP may have a Figure 2 and Figure 4 It should be noted that, for the sake of convenience, in the following, each of the plurality of sub-pixels SP has Figure 4 The discussion is provided with examples of structures (i.e., equivalent circuits).

[0157] Figure 5 is an example plan view of a display panel 210 according to aspects of the present disclosure.

[0158] Reference Figure 5 In one or more aspects, the display device 100 may be a transparent display device. In this implementation, the display panel 210 may be a transparent display panel configured to allow light (e.g., light having a first wavelength) to pass through the front (top) surface and the rear (bottom) surface of the display panel 210.

[0159] Reference Figure 5In one or more example embodiments, the display panel 210 may include a plurality of transmission areas TA configured to allow light (eg, light having a first wavelength) to pass through the front (top) and rear (bottom) surfaces of the display panel 210 .

[0160] The plurality of transmission areas TA may be areas that allow light having one or more wavelengths included in the visible light band (e.g., the first wavelength discussed above) to be transmitted. By applying this configuration, the rear surface or portion located behind the display device 100 may be visible from the front of the display device 100. The plurality of transmission areas TA may allow light having not only one or more wavelengths in the visible light band, but also one or more wavelengths (e.g., the second wavelength discussed above) included in the second band (e.g., the infrared band) to be transmitted. The plurality of transmission areas TA may also be referred to as transparent areas.

[0161] like Figure 5 As shown, for example, the display panel 210 may include a plurality of non-transmission areas NTA and a plurality of transmission areas TA. The plurality of non-transmission areas NTA and the plurality of transmission areas TA may be included in the display area DA of the display panel 210.

[0162] For example, the plurality of non-transmission areas NTA may be areas that do not allow light to be transmitted at all, or areas that allow light to be transmitted at a transmittance lower than that of the transmission area TA.

[0163] For example, Figure 5 As shown, each of the plurality of non-transmission areas NTA is an area in which a plurality of sub-pixels SP are disposed, and may be disposed in the first direction. The plurality of non-transmission areas NTA may be spaced apart from each other in the second direction. A transmission area TA may exist between two adjacent non-transmission areas NTA among the plurality of non-transmission areas NTA.

[0164] Reference Figure 5 Each of the plurality of non-transmission areas NTA may include a plurality of light emitting areas EA. The plurality of light emitting areas EA may be areas in which light from the plurality of light emitting elements ED included in the plurality of sub-pixels SP is emitted.

[0165] For example, refer to Figure 5 , a plurality of pixels P may be disposed in each of the plurality of non-transmission areas NTA. Each of the plurality of pixels P may include a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4.

[0166] For example, the first sub-pixel SP1 may emit light of a first color, the second sub-pixel SP2 may emit light of a second color, the third sub-pixel SP3 may emit light of a third color, and the fourth sub-pixel SP4 may emit light of a fourth color. For example, each of the first color light, the second color light, the third color light, and the fourth color light may be one of red light, green light, blue light, and white light.

[0167] Reference Figure 5 The ratio between the total area of ​​the plurality of non-transmission areas NTA and the total area of ​​the plurality of transmission areas TA may be determined at various values ​​according to the desired transparency of the display panel 210.

[0168] As described above, in the pen touch system 10 according to one or more exemplary embodiments of the present disclosure, in order to enable the pen (eg, Figure 3A In the embodiment of the present invention, when the light with the second wavelength emitted from the pen 110 is incident on the display panel 210 of the display device 100, a part of the light with the second wavelength may be absorbed inside the display panel 210, and another part of the light with the second wavelength may be reflected or converted into light with one or more other wavelengths inside the display panel 210, and then, redirected in the form of light with the second wavelength or in the form of light with one or more other wavelengths to move outside the display device 100. Herein, the redirected light may be, for example, reflected light, which means that among the light with the second wavelength emitted from the pen 110, some light is reflected inside the display device 100 after being incident on the display device 100, and is redirected to move outside the display device 100. In addition, the redirected light may be, for example, radiated light, which means that among the light having the second wavelength emitted from the pen 110, some of the light is converted into light having one or more other wavelengths inside the display device 100 after being incident on the display device 100, and is radiated to move to the outside of the display device 100 in the form of light having one or more other wavelengths.

[0169] Therefore, at a certain point of the display panel 210, a portion of the light having the second wavelength may be reflected, or light having one or more other wavelengths generated by converting the light having the second wavelength may be radiated, so that the resulting redirected light (reflected light or radiated light) moves to the outside of the display device 100, while at another point of the display panel 210, another portion of the light having the second wavelength may be absorbed, resulting in no generation of redirected light. In one or more aspects, the pen 110 may detect the touch position of the pen 110 by sensing the distribution, chromaticity difference, and / or wavelength difference of the redirected light from the display panel 210 or the display device 100.

[0170] In one or more aspects, the display panel 210 of the display device 100 may include a light control structure configured to enable the display panel 210 to be displayed when the display panel 210 is displayed from a pen (eg, Figure 3A A portion of the light with the second wavelength that is incident on the interior of the display panel 210 after being output by the pen 110) is reflected or converted into light with one or more other wavelengths and radiated in the form of light with one or more other wavelengths, thereby causing the resulting redirected light (i.e., reflected light or radiated light) to be generated from the display device 100.

[0171] In one or more aspects, the light control structure included in the display panel 210 of the display device 100 may include two or more of the following: a reflective structure configured to reflect light having a second wavelength, an absorption structure configured to absorb light having the second wavelength, and a radiation structure configured to convert light having the second wavelength into light having one or more other wavelengths and radiate the light having one or more other wavelengths.

[0172] The reflective structure may reflect light having the second wavelength included in the second wavelength band without changing the wavelength. The redirected light (reflected light) reflected by the reflective structure may be received by the pen 110 .

[0173] The absorption structure may absorb light having a second wavelength included in the second wavelength band (eg, infrared light). The absorption structure absorbing light having a second wavelength (eg, infrared light) may cause a chromaticity difference in the distribution of redirected light (reflected light and / or radiated light) received by the pen 110.

[0174] The absorption structure may not absorb light (e.g., visible light) having a first wavelength included in a first wavelength band (e.g., visible light band), or may absorb a small amount of light having the first wavelength. For example, the absorption structure may absorb light having a second wavelength included in a second wavelength band (e.g., infrared band) that does not overlap with the first wavelength band (e.g., visible light band).

[0175] The radiation structure may convert the light having the second wavelength into light having one or more other wavelengths and radiate the light having the one or more other wavelengths. The radiation structure may cause a wavelength difference of the redirected light (eg, infrared light) received by the pen 110 .

[0176] For example, one or more other wavelengths converted from the second wavelength by the radiation structure may be included in a second band (e.g., an infrared band, or more specifically, a near-infrared band) including the second wavelength. In another example, one or more other wavelengths converted from the second wavelength by the radiation structure may be included in a band different from the second band (e.g., an infrared band) including the second wavelength.

[0177] Hereinafter, a light control structure of the display panel 210 of the display device 100 according to one or more example embodiments of the present disclosure is described. It should be noted that some cross-sectional views related to the following description show corresponding portions of the transmission area TA and the non-transmission area NTA adjacent to each other.

[0178] Figure 6 is a cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0179] Reference Figure 6 In one or more example embodiments, the display panel 210 may include a first substrate 211 , a pixel array layer 610 on the first substrate 211 , an encapsulation layer 630 on the pixel array layer 610 , and a cover window 650 on the encapsulation layer 630 .

[0180] The first substrate 211 may include a plurality of transmission areas TA capable of transmitting light having a first wavelength included in a first wavelength band as a visible light band, and a plurality of non-transmission areas NTA different from the plurality of transmission areas TA. The plurality of transmission areas TA and the plurality of non-transmission areas NTA may be included in the display area DA.

[0181] The pixel array layer 610 may be a layer in which a plurality of pixels P are arranged, and a plurality of light emitting elements ED and a plurality of transistors included in a plurality of sub-pixels SP may be provided in the pixel array layer 610 .

[0182] The pixel array layer 610 may be disposed in the plurality of non-transmission areas NTA. Therefore, the plurality of light emitting elements ED may also be disposed in the plurality of non-transmission areas NTA.

[0183] Reference Figure 6 In one or more aspects, the display panel 210 may further include a code pattern layer CPL as a light control structure for providing an optical pen touch.

[0184] Reference Figure 6 , the code pattern layer CPL may be a layer including a plurality of code patterns CP formed in each of a plurality of transmissive areas TA for pen touch sensing. In one or more aspects, the code pattern layer CPL may be a layer in which a code pattern for pen touch sensing is formed or a layer for forming a code pattern, and may be referred to as a code pattern configuration layer.

[0185] Reference Figure 6, the code pattern layer CPL may be disposed in a plurality of transmission areas TA, and may include a photoactive material for forming the code pattern CP. For example, the photoactive material may respond to light having a second wavelength different from the first wavelength. For example, the photoactive material may include two or more of the following: an absorption material capable of absorbing light having a second wavelength; a reflection material capable of reflecting light having a second wavelength; and a radiation material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths.

[0186] Reference Figure 6 The code pattern layer CPL may include a plurality of light active patterns LRP and a filling layer FILL. The code pattern CP may be formed of a plurality of light active patterns LRP and a filling layer FILL.

[0187] In one or more aspects, a plurality of light active patterns LRP may be disposed in a plurality of transmission areas TA so that a plurality of code patterns CP for pen touch sensing may be formed in the plurality of transmission areas TA, i.e., a pen (eg, Figure 3A The pen 110) can recognize a plurality of code patterns CP in a plurality of transmission areas TA.

[0188] The filling layer FILL may be disposed not only in the plurality of transmission areas TA but also in the plurality of non-transmission areas NTA. For example, the filling layer FILL may be disposed in all areas or one or more partial areas of the display area DA. The filling layer FILL may include a filling material and have a planarization function.

[0189] Each of the plurality of photo active patterns LRP and the filling layer FILL may include a photo active material. However, the photo active material included in the plurality of photo active patterns LRP and the photo active material included in the filling layer FILL may perform different photoactivations.

[0190] Reference Figure 6 , the code pattern layer CPL may be located between the first substrate 211 and the encapsulation layer 630 .

[0191] Reference Figure 6 In one or more aspects, the display panel 210 may further include a color filter layer CFL on the pixel array layer 610. For example, the color filter layer CFL may be located below the encapsulation layer 630. In another example, the color filter layer CFL may be located on the encapsulation layer 630. The encapsulation layer 630 may be an encapsulation substrate.

[0192] The color filter layer CFL and the pixel array layer 610 may be disposed in the non-transmission area NTA, but may not be disposed in the transmission area TA.

[0193] The color filter layer CFL may be located between the pixel array layer 610 and the code pattern layer CPL, and may include a plurality of color filters CF disposed in the non-transmission area NTA.

[0194] Light emitted from the light emitting element ED included in the pixel array layer 610 may have a first wavelength different from the second wavelength of light output from the pen 110. Light emitted by the light emitting element ED included in the pixel array layer 610 and then passing through the color filter CF may have a first wavelength different from the second wavelength of light output by the pen 110.

[0195] The plurality of color filters CF may include a first color filter CF1 that allows light of a first color to be transmitted, a second color filter CF2 that allows light of a second color to be transmitted, and a third color filter CF3 that allows light of a third color to be transmitted. For example, the light of the first color, the light of the second color, and the light of the third color may have different wavelengths, and the corresponding wavelengths of the light of the first color, the light of the second color, and the light of the third color may be included in the first wavelength band (visible light wavelength).

[0196] The pixel array layer 610 may include a first subpixel SP1 under the first color filter CF1, a second subpixel SP2 under the second color filter CF2, a third subpixel SP3 under the third color filter CF3, and a fourth subpixel SP4 under a region where no color filter is disposed.

[0197] As in Figure 6 In the example of , the first sub-pixel SP1 may emit red light, the second sub-pixel SP2 may emit green light, the third sub-pixel SP3 may emit blue light, and the fourth sub-pixel SP4 may emit white light. For example, the red light may have a wavelength ranging from about 610nm to 700nm, the green light may have a wavelength ranging from about 500nm to 570nm, and the blue light may have a wavelength ranging from about 450nm to 500nm. White light may be a combination of all colors of light and therefore has all wavelength properties. The first emission area EA1 provided with the first color filter CF1 may be an area emitting red light, the second emission area EA2 provided with the second color filter CF2 may be an area emitting green light, the third emission area EA3 provided with the third color filter CF3 may be an area emitting blue light, and the fourth emission area EA4 provided with the fourth color filter CF4 may be an area emitting white light.

[0198] For example, a plurality of color filters CF may be provided in each of the plurality of non-transmission areas NTA and may be located on the encapsulation layer 630 or below the encapsulation layer 630. Each of the plurality of color filters CF may transmit light included in a first wavelength band (visible light band) including a first wavelength and having one or more wavelengths corresponding to a corresponding color.

[0199] Each of the plurality of color filters CF may include a material capable of transmitting light having a second wavelength and included in a second wavelength band output from the pen 110 for pen touch sensing.

[0200] Reference Figure 6 In the plurality of transmission areas TA, the photoactive material disposed in the code pattern layer CPL may include two or more photoactive materials that perform different types of photoactivation. For example, the photoactive material may include two or more of the following: an absorption material capable of absorbing light having a second wavelength; a reflection material capable of reflecting light having a second wavelength; and a radiation material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths.

[0201] Therefore, since the photoactive material is provided in the code pattern layer CPL, the plurality of transmission areas TA may not transmit the light having the second wavelength, or may transmit the light having the second wavelength at a low transmittance. On the contrary, the plurality of transmission areas TA may have a relatively high transmittance for the light having the first wavelength. Therefore, in the plurality of transmission areas TA, the transmittance for the light having the second wavelength may be lower than the transmittance for the light having the first wavelength.

[0202] In one or more aspects, the pen touch system may provide double-sided pen touch sensing or single-sided pen touch sensing according to a method and / or structure of arranging a plurality of light active patterns LRP in the code pattern layer CPL.

[0203] In an example where the pen touch system according to aspects of the present disclosure is configured to provide dual-sided pen touch sensing, the display device 100 may allow the pen 110 to input through both the front and rear surfaces of the display device 100 based on sensing data received from the pen 110 .

[0204] In an example where the pen touch system according to aspects of the present disclosure is configured to provide single-sided pen touch sensing, the display device 100 may allow the pen 110 to input through either the front or rear surface of the display device 100 based on sensing data received from the pen 110 .

[0205] In one or more aspects, the display panel 210 can have a top emission structure or a bottom emission structure, and in some implementations, can have both a top emission structure and a bottom emission structure.

[0206] In an example where the display panel 210 is configured to have a top emission structure or a bottom emission structure, a plurality of light emitting elements ED disposed in the pixel array layer 610 may emit light toward any one of the first substrate 211 and the cover window 650 .

[0207] In an example where the display panel 210 is configured to provide dual-sided pen touch sensing, the display device 100 may allow the pen 110 to input through both the front and rear surfaces of the display device 100 based on sensing data received from the pen 110 .

[0208] In an example where the display panel 210 is configured to provide single-sided pen touch sensing, the display device 100 may allow the pen 110 to input through any of the front and rear surfaces of the display device 100 based on sensing data received from the pen 110 .

[0209] Reference Figure 6 In one or more aspects, the display panel 210 may further include a film layer 635 on the encapsulation layer 630 and an adhesive layer 640 between the film layer 635 and the cover window 650 .

[0210] Figure 7 An example configuration of a code pattern in the display panel 210 according to aspects of the present disclosure is shown.

[0211] Reference Figure 7 The code pattern layer CPL may include: a plurality of data cell areas D-CELLs arranged in rows and columns, each of the plurality of data cell areas D-CELLs corresponding to a partial area of ​​the display area DA including the transmission area TA and the non-transmission area NTA; a plurality of first cell guide lines CGL1, each of the plurality of first cell guide lines CGL1 being disposed between adjacent data cell areas D-CELLs in the second direction; and a plurality of second cell guide lines CGL2, each of the plurality of second cell guide lines CGL2 being disposed between adjacent data cell areas D-CELLs in the first direction.

[0212] Each of the plurality of first cell guide lines CGL1 may extend in the first direction, and each of the plurality of second cell guide lines CGL2 may extend in the second direction.

[0213] The code pattern layer CPL may include: a plurality of data cell regions D-CELLs arranged in rows and columns; a plurality of first cell guide lines CGL1, each of the plurality of first cell guide lines CGL1 being disposed between adjacent data cell regions D-CELLs in the second direction; and a plurality of second cell guide lines CGL2, each of the plurality of second cell guide lines CGL2 being disposed between adjacent data cell regions D-CELLs in the first direction.

[0214] Reference Figure 7 , the plurality of code patterns CP may include: a plurality of first guide code patterns CP_CGL1 for representing each of a plurality of first unit guide lines CGL1; a plurality of second guide code patterns CP_CGL2 for representing each of a plurality of second unit guide lines CGL2; and a plurality of data code patterns CP_CELL, the plurality of data code patterns CP_CELL being disposed in each of a plurality of data cell regions D-CELL and arranged in rows and columns.

[0215] Reference Figure 7 , a pattern in which the plurality of data code patterns CP_CELL are arranged may be different for each of the plurality of data cell regions D-CELL.

[0216] The plurality of data code patterns CP_CELL included in each of the plurality of data cell regions D-CELL may be arranged in a matrix pattern of m rows and n columns.

[0217] In each of the plurality of data cell regions D-CELL, a plurality of data code patterns CP_CELL may be arranged along virtual grid lines ( VGL1 , VGL2 ) of m rows and n columns.

[0218] Each of the plurality of data cell regions D-CELL may correspond to one coordinate data. A pattern in which the positions of the plurality of data code patterns CP_CELL included in each of the plurality of data cell regions D-CELL are respectively set may represent one coordinate data. According to this configuration, the plurality of data code patterns CP_CELL are arranged in each of the plurality of data cell regions D-CELL in m rows and n columns, but for each of the plurality of data cell regions D-CELL, at least one or more of the positions in which the plurality of data code patterns CP_CELL are respectively set may be slightly different.

[0219] The plurality of data code patterns CP_CELL included in each of the plurality of data cell regions D-CELL may have a unique arrangement shape corresponding to a unique coordinate pair (the unique arrangement shape may also be referred to as a unique setting position pattern).

[0220] The unique arrangement position pattern of the plurality of data code patterns CP_CELL included in each of the plurality of data cell regions D-CELL may be an encryption pattern representing a unique coordinate pair.

[0221] Reference Figure 7 , each of the plurality of data cell regions D-CELL may have 36 data code patterns CP_CELL arranged in 6 rows and 6 columns as a corresponding unique pattern to represent a unique coordinate pair using a code.

[0222] The first data cell region D-CELL1 may include 36 data code patterns CP_CELL for representing a first coordinate. The second data cell region D-CELL2 may include 36 data code patterns CP_CELL for representing a second coordinate. The third data cell region D-CELL3 may include 36 data code patterns CP_CELL for representing a third coordinate. The fourth data cell region D-CELL4 may include 36 data code patterns CP_CELL for representing a fourth coordinate. The fifth data cell region D-CELL5 may include 36 data code patterns CP_CELL for representing a fifth coordinate.

[0223] The setting position pattern of the 36 data code patterns CP_CELL included in the first data cell area D-CELL1 may be an encrypted pattern indicating the first coordinate. The setting position pattern of the 36 data code patterns CP_CELL included in the second data cell area D-CELL2 may be an encrypted pattern indicating the second coordinate. The setting position pattern of the 36 data code patterns CP_CELL included in the third data cell area D-CELL3 may be an encrypted pattern indicating the third coordinate. The setting position pattern of the 36 data code patterns CP_CELL included in the fourth data cell area D-CELL4 may be an encrypted pattern indicating the fourth coordinate. The setting position pattern of the 36 data code patterns CP_CELL included in the fifth data cell area D-CELL5 may be an encrypted pattern indicating the fifth coordinate.

[0224] For example, the first coordinate corresponding to the first data cell region D-CELL1, the second coordinate corresponding to the second data cell region D-CELL2, the third coordinate corresponding to the third data cell region D-CELL3, the fourth coordinate corresponding to the fourth data cell region D-CELL4, and the fifth coordinate corresponding to the fifth data cell region D-CELL5 may be different from each other. Therefore, the setting position pattern of the 36 data code patterns CP_CELL included in the first data cell region D-CELL1, the setting position pattern of the 36 data code patterns CP_CELL included in the second data cell region D-CELL2, the setting position pattern of the 36 data code patterns CP_CELL included in the third data cell region D-CELL3, the setting position pattern of the 36 data code patterns CP_CELL included in the fourth data cell region D-CELL4, and the setting position pattern of the 36 data code patterns CP_CELL included in the fifth data cell region D-CELL5 may be different from each other.

[0225] Each of the plurality of data cell regions D-CELL may correspond to a corresponding portion of the display area DA. Each data cell region D-CELL may overlap with a group of two or more sub-pixels among the plurality of sub-pixels included in the display area DA. For example, a first data cell region D-CELL1 may overlap with a first group including two or more first sub-pixels, and a second data cell region D-CELL2 may overlap with a second group including two or more second sub-pixels. The two or more first sub-pixels included in the first group and the two or more second sub-pixels included in the second group may be different from each other.

[0226] Pen (e.g. Figure 3A The pen 110) can identify multiple code patterns CP based on the redirected light, identify multiple first unit guide lines CGL1 and multiple second unit guide lines CGL2 based on the recognition result, and identify multiple data cell areas D-CELL divided by the multiple first unit guide lines CGL1 and the multiple second unit guide lines CGL2.

[0227] The pen 110 may recognize a set position pattern of a plurality of data code patterns CP_CELL included in at least one of a plurality of data cell regions D-CELL, and determine a position (ie, a touch position) of the pen 110 based on a result of the recognition.

[0228] Reference Figure 7For example, when the pen 110 touches a position Pt centered on the first data cell area D-CELL1, the pen 110 can identify a corresponding setting position pattern of a plurality of data code patterns CP_CELL included in each of the first to fifth data cell areas (D-CELL1 to D-CELL5) based on a result obtained by sensing redirected light having a chromaticity difference or a wavelength difference, and calculate a more accurate touch position based on the first to fifth coordinates corresponding to the first to fifth data cell areas (D-CELL1 to D-CELL5) and the signal intensity difference of the redirected light.

[0229] Hereinafter, an example structure of the code pattern CP provided in the display panel 210 according to an example embodiment of the present disclosure will be described in more detail.

[0230] Figure 8 , Fig. 9 and Fig.10 is an example plan view of a display panel 210 in which a plurality of code patterns CP are disposed in a transmissive area TA according to aspects of the present disclosure.

[0231] Reference Figures 8 to 10 , the display panel 210 may include a plurality of non-transmission areas NTA and a plurality of transmission areas TA.

[0232] Reference Figures 8 to 10 The plurality of non-transmission areas NTA may be areas in which the plurality of pixels P are disposed. Each of the plurality of pixels P may include a plurality of sub-pixels SP. The plurality of non-transmission areas NTA may include a plurality of light emitting areas corresponding to the plurality of sub-pixels SP.

[0233] Reference Figures 8 to 10 , a plurality of light active patterns LRP may be disposed in a plurality of transmission areas TA among a plurality of non-transmission areas NTA and a plurality of transmission areas TA. A plurality of code patterns CP for pen touch sensing may be configured by the plurality of light active patterns LRP.

[0234] Reference Figures 8 to 10 , a plurality of code patterns CP for pen touch sensing may be disposed in a plurality of transmission areas TA among a plurality of non-transmission areas NTA and a plurality of transmission areas TA.

[0235] like Figure 8 As shown, one light active pattern LRP may be configured to correspond to one pixel P.

[0236] like Fig. 9 As shown, one light active pattern LRP can be configured to correspond to two pixels P. According to these configurations, Fig. 9The number of light active patterns LRP arranged per unit area may be less than Figure 8 The number of light active patterns LRP set per unit area.

[0237] like Fig.10 As shown, one light active pattern LRP can be configured to correspond to two pixels P. According to these configurations, Fig.10 The number of light active patterns LRP arranged per unit area may be equal to Fig. 9 The number of light active patterns LRP set per unit area.

[0238] Reference Fig. 9 , the multiple light active patterns LRP set in each odd-numbered transmission area TA among the multiple transmission areas TA can be configured to correspond to the corresponding odd pixel rows (or the corresponding even pixel rows), and the multiple light active patterns LRP set in each even-numbered transmission area TA among the multiple transmission areas TA can be configured to correspond to the corresponding even pixel rows (or the corresponding odd pixel rows).

[0239] Reference Fig.10 , the multiple light active patterns LRP set in each odd-numbered transmission area TA among the multiple transmission areas TA can be configured to correspond to the corresponding odd pixel rows (or the corresponding even pixel rows), and the multiple light active patterns LRP set in each even-numbered transmission area TA among the multiple transmission areas TA can be configured to correspond to the corresponding even pixel rows (or the corresponding odd pixel rows).

[0240] Reference Figures 8 to 10 as well as Figure 7 , Figures 8 to 10 At least some of the light active patterns LRP shown in the figure may correspond to a code pattern CP_CELL set in two or more data cell regions D-CELL, to a code pattern CP_CELL set in one data cell region D-CELL, or to a code pattern CP_CELL set in a part of one data cell region D-CELL.

[0241] also, Figures 8 to 10 Some of the light active patterns LRP shown in FIG. 4 may correspond to code patterns (CP_CGL1, CP_CGL2) corresponding to the first and second cell guide lines (CGL1, CGL2) surrounding the data cell region D-CELL.

[0242] Fig.11 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0243] Reference Fig.11, the code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP.

[0244] For example, the at least one light active pattern LRP may include a lower light active pattern DLRP located on the first substrate 211 and an upper light active pattern ULRP located over the lower light active pattern DLRP.

[0245] The filling layer FILL may be configured to cover the lower light active pattern DLRP, and may be located between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0246] Reference Fig.11 , the upper light active pattern ULRP and the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0247] Reference Fig.11 , the upper and lower photo active patterns ULRP and DLRP may include a first photo active material, and the filling layer FILL may include a second photo active material that performs photo activation different from the first photo active material.

[0248] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0249] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0250] Reference Fig.11 , the upper light active pattern ULRP and the lower light active pattern DLRP may vertically overlap each other.

[0251] Reference Fig.11, the upper light active pattern ULRP and the lower light active pattern DLRP may result in a chromaticity difference or a wavelength difference in the redirected light distribution. Therefore, the upper light active pattern ULRP may be a code pattern CP for allowing pen touch sensing through the front surface of the display panel 210, and the lower light active pattern DLRP may be a code pattern CP for allowing pen touch sensing through the rear surface of the display panel 210.

[0252] Reference Fig.11 , in an example where the pen 110 is located on or above the front surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the cover window 650 .

[0253] Reference Fig.11 , in an example where the pen 110 is located on or below the rear surface of the display panel 210 , light having the second wavelength may be incident on the first substrate 211 .

[0254] like Fig.11 As shown, in the example where the code pattern layer CPL includes a lower light active pattern DLRP, an upper light active pattern ULRP, and a filling layer FILL between the lower light active pattern DLRP and the upper light active pattern ULRP, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP, and the pen 110 or another pen 110 located on or below the rear surface of the display device 100 can also recognize one or more corresponding code patterns CP.

[0255] Therefore, pen touch (ie, pen touch input) of one or more pens 110 may be implemented through both the front and rear surfaces of the display device 100 .

[0256] Fig.12 The present disclosure shows various aspects of the Fig.11 An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.12 In the example, it is assumed that the light having the second wavelength is infrared light.

[0257] exist Fig.12 In an example, the upper light active pattern ULRP and the lower light active pattern DLRP may include the absorption material AP, and the filling layer FILL may include the reflection material RFL.

[0258] Reference Fig.12 , when infrared light as light having the second wavelength is emitted from a pen (eg, a pen) located on or above the front surface (eg, a surface adjacent to the cover window 650) of the display panel 210, Figure 3AWhen the pen 110 outputs, some of the infrared light reaching the upper light active pattern ULRP may be absorbed by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL may be reflected by the filling layer FILL.

[0259] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in the area above the upper light active pattern ULRP, but the redirected light may exist normally in the remaining areas.

[0260] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0261] Reference Fig.12 , when infrared light as light having the second wavelength is emitted from a pen (eg, a surface adjacent to the substrate 211) located on or below the rear surface of the display panel 210 (eg, Figure 3A When the pen 110 outputs infrared light, some of the infrared light reaching the lower light active pattern DLRP may be absorbed by the lower light active pattern DLRP, and some of the infrared light reaching the lower surface of the filling layer FILL may be reflected by the filling layer FILL.

[0262] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in the area under the lower light active pattern DLRP, but the redirected light may exist normally in the remaining areas.

[0263] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0264] Fig.13 The present disclosure shows various aspects of the Fig.11 An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.13 In the example, it is assumed that the light having the second wavelength is infrared light.

[0265] exist Fig.13 In an example, the upper and lower light active patterns ULRP and DLRP may include the reflective material RFL, and the filling layer FILL may include the absorbing material AP.

[0266] Reference Fig.13, when infrared light as light having the second wavelength is emitted from the pen 110 (eg, a surface adjacent to the cover window 650) located on or above the front surface of the display panel 210 (eg, Figure 3A When the infrared light is output by the pen, some of the infrared light reaching the upper light active pattern ULRP may be reflected by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0267] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may normally exist in the area above the upper light active pattern ULRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0268] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0269] Reference Fig.13 , when infrared light as light having the second wavelength is emitted from a pen (eg, a surface adjacent to the substrate 211) located on or below the rear surface of the display panel 210 (eg, Figure 3A When the pen 110 outputs, some of the infrared light reaching the lower light active pattern DLRP may be reflected by the lower light active pattern DLRP, and some of the infrared light reaching the lower surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0270] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may normally exist in the area under the lower light active pattern DLRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0271] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0272] Fig.14 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0273] Reference Fig.14 , the code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP.

[0274] The light active pattern LRP may include an upper light active pattern ULRP on the filling layer FILL.

[0275] The filling layer FILL may be located on the first substrate 211 .

[0276] Reference Fig.14 , the upper light active pattern ULRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0277] Reference Fig.14 , the upper photo active pattern ULRP may include a first photo active material, and the filling layer FILL may include a second photo active material that performs photo activation different from that of the first photo active material.

[0278] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0279] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0280] Reference Fig.14 , the upper light active pattern ULRP may cause a chromaticity difference or a wavelength difference in the distribution of the redirected light. Therefore, the upper light active pattern ULRP may be a code pattern CP for allowing pen touch sensing through the front surface of the display panel 210.

[0281] Reference Fig.14 , in the pen (e.g., Figure 3A In an example in which the pen 110 is located on or above the front surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the cover window 650 .

[0282] Reference Fig.14In the example where the pen 110 is located on or below the rear surface of the display panel 210, light having a second wavelength may be incident on the first substrate 211, but all or most of the light having the second wavelength incident on the first substrate 211 may be reflected, absorbed, or radiated by the filling layer FILL.

[0283] like Fig.14 As shown, in the example where the code pattern layer CPL includes an upper light active pattern ULRP and a filling layer FILL, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP, but the pen 110 located on or below the rear surface of the display device 100 cannot recognize one or more code patterns CP.

[0284] Therefore, pen touches (ie, input of pen touches) of one or more pens 110 may be implemented through the front surface of the display device 100 .

[0285] Fig.15 The present disclosure shows various aspects of the Fig.14 An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.15 In the example, it is assumed that the light having the second wavelength is infrared light.

[0286] exist Fig.15 In an example, the upper light active pattern ULRP may include the absorption material AP, and the filling layer FILL may include the reflection material RFL.

[0287] Reference Fig.15 , when infrared light as light having the second wavelength is emitted from the pen 110 (eg, a surface adjacent to the cover window 650) located on or above the front surface of the display panel 210 (eg, Figure 3A When the infrared light is output by the pen, some of the infrared light reaching the upper light active pattern ULRP can be absorbed by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL can be reflected by the filling layer FILL.

[0288] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in a region above the upper light active pattern ULRP, but the redirected light may exist normally in the remaining regions.

[0289] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0290] Reference Fig.15, when infrared light as light having a second wavelength is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), all or most of the infrared light reaching the lower surface of the filling layer FILL may be reflected by the filling layer FILL.

[0291] Therefore, chromaticity difference may not occur in the distribution of redirected light from the back side of the display panel 210 .

[0292] Therefore, since the pen 110 located on or below the rear surface of the display device 100 cannot recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input cannot be implemented through the rear surface of the display device 100 .

[0293] Fig.16 The present disclosure shows various aspects of the Fig.14 An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.16 In the example, it is assumed that the light having the second wavelength is infrared light.

[0294] exist Fig.16 In an example, the upper light active pattern ULRP may include a reflective material RFL, and the filling layer FILL may include an absorbing material AP.

[0295] Reference Fig.16 , when infrared light as light having the second wavelength is emitted from the pen 110 (eg, a surface adjacent to the cover window 650) located on or above the front surface of the display panel 210 (eg, Figure 3A When the infrared light is output by the pen, some of the infrared light reaching the upper light active pattern ULRP may be reflected by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0296] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may normally exist in the area above the upper light active pattern ULRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0297] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0298] Reference Fig.16, when infrared light as light having a second wavelength is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), all or most of the infrared light reaching the lower surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0299] Therefore, chromaticity difference may not occur in the distribution of redirected light from the back side of the display panel 210 .

[0300] Therefore, since the pen 110 located on or below the rear surface of the display device 100 cannot recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input cannot be implemented through the rear surface of the display device 100 .

[0301] Fig.17 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0302] Reference Fig.17 , the code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP.

[0303] The light active pattern LRP may include a lower light active pattern DLRP located on the first substrate 211 .

[0304] The filling layer FILL may be located on the lower light active pattern DLRP, and may be configured to cover the lower light active pattern DLRP.

[0305] Reference Fig.17 , the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0306] Reference Fig.17 , the code pattern layer CPL includes a lower light active pattern DLRP located on the first substrate 211 and a filling layer FILL located on the lower light active pattern DLRP.

[0307] Reference Fig.17 , the lower light active pattern DLRP may include a first light active material, and the filling layer FILL may include a second light active material that performs light activation different from that of the first light active material.

[0308] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0309] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0310] Reference Fig.17 , the lower light active pattern DLRP may cause a chromaticity difference or a wavelength difference in the distribution of the redirected light. Therefore, the lower light active pattern DLRP may be a code pattern CP for allowing pen touch sensing through the rear surface of the display panel 210.

[0311] Reference Fig.17 , in the pen (e.g., Figure 3A In an example where the pen 110 is located on or below the rear surface of the display panel 210 , light having the second wavelength may be incident on the first substrate 211 .

[0312] Reference Fig.17 In the example where the pen 110 is located on or above the front surface of the display panel 210, light having a second wavelength output by the pen 110 may be incident on the cover window 650, but all or most of the light having the second wavelength may be reflected, absorbed, or radiated by the filling layer FILL.

[0313] like Fig.17 As shown, in the example where the code pattern layer CPL includes a lower light active pattern DLRP and a filling layer FILL, the pen 110 located on or above the front surface of the display device 100 cannot recognize one or more corresponding code patterns CP, but the pen 110 located on or below the rear surface of the display device 100 can recognize one or more code patterns CP.

[0314] Therefore, the pen touch of the pen 110 (ie, input of the pen touch) may be implemented through the rear surface of the display device 100 .

[0315] Fig.18 The present disclosure shows various aspects of the Fig.17 An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.18 In the example, it is assumed that the light having the second wavelength is infrared light.

[0316] exist Fig.18 In an example, the lower light active pattern DLRP may include the absorption material AP, and the filling layer FILL may include the reflection material RFL.

[0317] Reference Fig.18 , when infrared light as light having the second wavelength is emitted from the pen 110 (eg, a surface adjacent to the cover window 650) located on or above the front surface of the display panel 210 (eg, Figure 3A When the infrared light is output by the pen, all or most of the infrared light reaching the upper surface of the filling layer FILL can be reflected by the filling layer FILL.

[0318] Therefore, chromaticity difference may not occur in the distribution of redirected light from the front of the display panel 210 .

[0319] Therefore, since the pen 110 located on or over the front surface of the display device 100 cannot recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input cannot be implemented through the front surface of the display device 100 .

[0320] Reference Fig.18 , when infrared light as light having a second wavelength is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), some of the infrared light that reaches the lower light active pattern DLRP may be absorbed by the lower light active pattern DLRP, and some of the infrared light that reaches the lower surface of the filling layer FILL may be reflected by the filling layer FILL.

[0321] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in a region under the lower light active pattern DLRP, but the redirected light may exist normally in the remaining regions.

[0322] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0323] Fig.19 The present disclosure shows various aspects of the Fig.17An example scheme for forming a code pattern in the display panel 210. It should be noted that Fig.19 In the example, it is assumed that the light having the second wavelength is infrared light.

[0324] exist Fig.19 In an example, the lower light active pattern DLRP may include the reflective material RFL, and the filling layer FILL may include the absorbing material AP.

[0325] Reference Fig.19 , when infrared light as light having the second wavelength is emitted from the pen 110 (eg, a surface adjacent to the cover window 650) located on or above the front surface of the display panel 210 (eg, Figure 3A When the infrared light is output by the pen, all or most of the infrared light reaching the upper surface of the filling layer FILL can be absorbed by the filling layer FILL.

[0326] Therefore, chromaticity difference may not occur in the distribution of redirected light from the front of the display panel 210 .

[0327] Therefore, since the pen 110 located on or over the front surface of the display device 100 cannot recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input cannot be implemented through the front surface of the display device 100 .

[0328] Reference Fig.19 , when infrared light as light having a second wavelength is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), some of the infrared light that reaches the lower light active pattern DLRP may be reflected by the lower light active pattern DLRP, and some of the infrared light that reaches the lower surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0329] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may normally exist in the area under the lower light active pattern DLRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0330] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0331] Fig. 20 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0332] Fig. 20 The vertical structure in the cross-sectional view can be Fig.11The vertical structures in the cross-sectional views of FIG. 1 and FIG. 2 are substantially the same, but there are only slight differences in the configurations of the various code pattern layers CPL. Fig.11 Examples of different features to provide Fig. 20 Discussion of examples.

[0333] Reference Fig. 20 , the code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. For example, the at least one light active pattern LRP may include a lower light active pattern DLRP located on the first substrate 211 and an upper light active pattern ULRP located above the lower light active pattern DLRP. The filling layer FILL may be configured to cover the lower light active pattern DLRP and may be located between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0334] Reference Fig. 20 , the upper light active pattern ULRP and the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0335] Reference Fig. 20 , the upper and lower photo active patterns ULRP and DLRP may include a first photo active material, and the filling layer FILL may include a second photo active material that performs photo activation different from the first photo active material.

[0336] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0337] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0338] Reference Fig. 20, the upper light active pattern ULRP and the lower light active pattern DLRP may cause a chromaticity difference or a wavelength difference in the redirected light distribution. Therefore, the upper light active pattern ULRP may be a code pattern CP for allowing pen touch sensing through the front surface of the display panel 210, and the lower light active pattern DLRP may be a code pattern CP for allowing pen touch sensing through the rear surface of the display panel 210.

[0339] Reference Fig. 20 , the upper light active pattern ULRP and the lower light active pattern DLRP may not vertically overlap each other. Therefore, the pen (eg, Figure 3A Double-sided pen touch sensing of the pen 110).

[0340] Reference Fig. 20 In an example where the lower light active pattern DLRP and the upper light active pattern ULRP do not overlap each other, respective positions of the lower light active pattern DLRP and the upper light active pattern ULRP may be symmetrical about the center line Lc of the transmission area TA.

[0341] Reference Fig. 20 , in an example where the pen 110 is located on or above the front surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the cover window 650 .

[0342] Reference Fig. 20 , in an example where the pen 110 is located on or below the rear surface of the display panel 210 , light having the second wavelength may be incident on the first substrate 211 .

[0343] like Fig. 20 As shown, in the example where the code pattern layer CPL includes a lower light active pattern DLRP, an upper light active pattern ULRP, and a filling layer FILL between the lower light active pattern DLRP and the upper light active pattern ULRP, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP, and the pen 110 or another pen 110 located on or below the rear surface of the display device 100 can also recognize one or more corresponding code patterns CP.

[0344] Therefore, pen touch (ie, input of pen touch) of one or more pens 110 may be implemented through both the front surface and the rear surface of the display device 100 .

[0345] For example, the upper light active pattern ULRP and the lower light active pattern DLRP may include the absorption material AP, and the filling layer FILL may include the reflection material RFL.

[0346] When infrared light as light having the second wavelength is emitted from a pen (eg, a pen) located on or above the front surface (eg, a surface adjacent to the cover window 650) of the display panel 210, Figure 3A When the pen 110 outputs, some of the infrared light reaching the upper light active pattern ULRP may be absorbed by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL may be reflected by the filling layer FILL.

[0347] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in a region above the upper light active pattern ULRP, but the redirected light may exist normally in the remaining regions.

[0348] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0349] When infrared light, which is light having a second wavelength, is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), some of the infrared light that reaches the lower light active pattern DLRP may be absorbed by the lower light active pattern DLRP, and some of the infrared light that reaches the lower surface of the filling layer FILL may be reflected by the filling layer FILL.

[0350] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may not exist or exist in a very small amount in a region under the lower light active pattern DLRP, but the redirected light may exist normally in the remaining regions.

[0351] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0352] In another example, the upper and lower light active patterns ULRP and DLRP may include the reflective material RFL, and the filling layer FILL may include the absorption material AP.

[0353] When infrared light as light having the second wavelength is emitted from a pen (eg, a pen) located on or above the front surface (eg, a surface adjacent to the cover window 650) of the display panel 210, Figure 3AWhen the pen 110 outputs, some of the infrared light reaching the upper light active pattern ULRP may be reflected by the upper light active pattern ULRP, and some of the infrared light reaching the upper surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0354] Therefore, chromaticity difference may occur in the distribution of redirected light from the front of the display panel 210. For example, the redirected light may normally exist in the area above the upper light active pattern ULRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0355] Therefore, since the pen 110 located on or over the front surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the front surface of the display device 100 .

[0356] When infrared light, which is light having a second wavelength, is output from the pen 110 located on or below the rear surface of the display panel 210 (e.g., a surface adjacent to the substrate 211), some of the infrared light that reaches the lower light active pattern DLRP may be reflected by the lower light active pattern DLRP, and some of the infrared light that reaches the lower surface of the filling layer FILL may be absorbed by the filling layer FILL.

[0357] Therefore, chromaticity difference may occur in the distribution of redirected light from the back of the display panel 210. For example, the redirected light may normally exist in the area under the lower light active pattern DLRP, but the redirected light may not exist or exist in a very small amount in the remaining areas.

[0358] Therefore, since the pen 110 located on or below the rear surface of the display device 100 can recognize one or more corresponding code patterns CP through the chromaticity difference of the redirected light, the pen touch input can be implemented through the rear surface of the display device 100 .

[0359] Fig.21 is an example plan view of a display panel 210 in which a plurality of code patterns CP are disposed in a transmissive area TA according to aspects of the present disclosure.

[0360] Reference Fig.21 , the code pattern layer CPL may include an upper code pattern layer UCPL, a filling layer FILL and a lower code pattern layer DCPL.

[0361] Reference Fig.21 The upper code pattern layer UCPL may include a plurality of upper light active patterns ULRP. A pen (eg, Figure 3AThe pen 110) can recognize one or more corresponding code patterns CP through a plurality of upper light active patterns ULRP.

[0362] Reference Fig.21 , the lower code pattern layer DCPL may include a plurality of lower light active patterns DLRP. A pen located on or above the rear surface of the display device 100 may recognize one or more corresponding code patterns CP through the plurality of lower light active patterns DLRP.

[0363] Reference Fig.21 , the display panel 210 may include a plurality of non-transmission areas NTA and a plurality of transmission areas TA. For example, the plurality of non-transmission areas NTA and the plurality of transmission areas TA may be configured to alternate with each other.

[0364] Reference Fig.21 , the plurality of transmission areas TA may include first to seventh transmission areas (TA1 to TA7).

[0365] Reference Fig.21 , the plurality of upper light active patterns ULRP and the plurality of lower light active patterns DLRP disposed in each of the first to seventh transmission areas (TA1 to TA7) may not overlap with each other.

[0366] For example, in each of the first to seventh transmission areas (TA1 to TA7), the positions of the plurality of upper light active patterns ULRP and the positions of the plurality of lower light active patterns DLRP may be left-right symmetrical about the center line Lc in the first direction in each of the first to seventh transmission areas (TA1 to TA7) (i.e., symmetrical in the second direction).

[0367] For example, in the fourth transmission area TA4, positions of the plurality of upper light active patterns ULRP and positions of the plurality of lower light active patterns DLRP may be bilaterally symmetric about the center line Lc in the first direction in the fourth transmission area TA4 (ie, symmetric in the second direction).

[0368] In another example, in the sixth transmission area TA6, positions of the plurality of upper light active patterns ULRP and positions of the plurality of lower light active patterns DLRP may be left-right symmetrical about the center line Lc in the first direction in the sixth transmission area TA6 (ie, symmetrical in the second direction).

[0369] Reference Fig.21 and Figure 7 , Fig.21At least some of the photoactive patterns shown (including LRP of ULRP and DLRP) may correspond to a code pattern CP_CELL set in two or more data cell regions D-CELL, to a code pattern CP_CELL set in one data cell region D-CELL, or to a code pattern CP_CELL set in a portion of one data cell region D-CELL.

[0370] in addition, Fig.21 Some of the illustrated photoactive patterns (LRP including ULRP and DLRP) may correspond to code patterns (CP_CGL1, CP_CGL2) corresponding to first and second cell guide lines (CGL1, CGL2) around the data cell region D-CELL.

[0371] Fig. 22 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0372] Reference Fig. 22 , the code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. For example, the at least one light active pattern LRP may include a lower light active pattern DLRP located on the first substrate 211 and an upper light active pattern ULRP located above the lower light active pattern DLRP. The filling layer FILL may be configured to cover the lower light active pattern DLRP and may be located between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0373] Reference Fig. 22 , the upper light active pattern ULRP and the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0374] Reference Fig. 22 , one upper light active pattern ULRP may be disposed in each transmission area TA. Also, one lower light active pattern DLRP may be disposed in each transmission area TA.

[0375] Reference Fig. 22 The code pattern layer CPL may include a lower light active pattern DLRP on the first substrate 211, an upper light active pattern ULRP over the lower light active pattern DLRP, and a filling layer FILL between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0376] Reference Fig. 22, the upper and lower photo active patterns ULRP and DLRP may include a first photo active material, and the filling layer FILL may include a second photo active material that performs photo activation different from the first photo active material.

[0377] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0378] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0379] Reference Fig. 22 , for example, the upper light active pattern ULRP and the lower light active pattern DLRP may vertically overlap each other. In another example, the upper light active pattern ULRP and the lower light active pattern DLRP may not vertically overlap each other.

[0380] Reference Fig. 22 , each of the upper light active pattern ULRP and the lower light active pattern DLRP may include a corresponding opening OP. For example, the opening OP of the upper light active pattern ULRP and the opening OP of the lower light active pattern DLRP may overlap each other vertically. In another example, the opening OP of the upper light active pattern ULRP and the opening OP of the lower light active pattern DLRP may not overlap each other vertically. Therefore, the pen (for example, Figure 3A Although not shown in the figure, in an example where the opening OP of the upper light active pattern ULRP and the opening OP of the lower light active pattern DLRP do not overlap each other, the corresponding positions of the openings of the lower light active pattern DLRP and the upper light active pattern ULRP may be symmetrical about the center line of the transmission area TA.

[0381] Reference Fig. 22, due to the openings OP of the upper light active pattern ULRP and the lower light active pattern DLRP, a chromaticity difference or a wavelength difference may occur in the redirected light distribution. Therefore, the opening OP of the upper light active pattern ULRP may be a code pattern CP for allowing pen touch sensing through the front surface of the display panel 210, and the opening OP of the lower light active pattern DLRP may be a code pattern CP for allowing pen touch sensing through the rear surface of the display panel 210.

[0382] Reference Fig. 22 , in the pen (e.g., Figure 3A In an example in which the pen 110 is located on or above the front surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the cover window 650 .

[0383] Reference Fig. 22 , in an example where the pen 110 is located on or below the rear surface of the display panel 210 , light having the second wavelength may be incident on the first substrate 211 .

[0384] like Fig. 22 As shown, in the example where the code pattern layer CPL includes a lower light active pattern DLRP, an upper light active pattern ULRP, and a filling layer FILL between the lower light active pattern DLRP and the upper light active pattern ULRP, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP, and the pen 110 or another pen 110 located on or below the rear surface of the display device 100 can also recognize one or more corresponding code patterns.

[0385] Therefore, pen touch (ie, input of pen touch) of one or more pens 110 may be implemented through both the front surface and the rear surface of the display device 100 .

[0386] Fig.23 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure. Fig.23 The cross-sectional structure can be Fig. 22 The cross-sectional structures of Fig. 22 Examples of different features to provide Fig.23 Discussion of examples.

[0387] Reference Fig.23 The code pattern layer CPL may include a filling layer FILL located on the first substrate 211 and an upper light active pattern ULRP located on the filling layer FILL.

[0388] Reference Fig.23, the upper photo active pattern ULRP may include a first photo active material, and the filling layer FILL may include a second photo active material that performs photo activation different from that of the first photo active material.

[0389] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0390] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0391] Reference Fig.23 , the upper optical active pattern ULRP may have an opening OP. Fig.23 Due to the opening OP of the upper light active pattern ULRP, a chromaticity difference or a wavelength difference may occur in the distribution of the redirected light. Therefore, the opening OP of the upper light active pattern ULRP may be a code pattern CP for allowing pen touch sensing through the front surface of the display panel 210.

[0392] Reference Fig.23 , in the pen (e.g., Figure 3A In an example in which the pen 110 is located on or above the front surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the cover window 650 .

[0393] Reference Fig.23 In the example where the pen 110 is located on or below the rear surface of the display panel 210, light having a second wavelength may be incident on the first substrate 211, but all or most of the light having the second wavelength incident on the first substrate 211 may be absorbed, reflected, or radiated by the filling layer FILL.

[0394] like Fig.23As shown, in the example where the code pattern layer CPL includes an upper light active pattern ULRP and a filling layer FILL, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP, but the pen 110 located on or below the rear surface of the display device 100 cannot recognize one or more code patterns CP.

[0395] Therefore, pen touches (ie, input of pen touches) of one or more pens 110 may be implemented through the front surface of the display device 100 .

[0396] Fig.24 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0397] Reference Fig.24 , the code pattern layer CPL may include a lower light active pattern DLRP located on the first substrate 211 and a filling layer FILL located on the lower light active pattern DLRP.

[0398] Reference Fig.24 , the lower light active pattern DLRP may include a first light active material, and the filling layer FILL may include a second light active material that performs light activation different from that of the first light active material.

[0399] The first photoactive material may be any one of the following: an absorbing material capable of absorbing light having a second wavelength; a reflecting material capable of reflecting light having a second wavelength; and a radiating material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths. The second photoactive material may be any one of the absorbing material, the reflecting material, and the radiating material, which is different from the first photoactive material.

[0400] For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a reflective material. For example, the first photoactive material may be an absorbing material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a reflective material, and the second photoactive material may be a radiating material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be an absorbing material. For example, the first photoactive material may be a radiating material, and the second photoactive material may be a reflective material.

[0401] Reference Fig.24 , the lower light active pattern DLRP may include corresponding openings OP.

[0402] Reference Fig.24Due to the opening OP of the lower light active pattern DLRP, a chromaticity difference or a wavelength difference may occur in the redirected light distribution. Therefore, the opening OP of the lower light active pattern DLRP may be a code pattern CP for allowing pen touch sensing through the rear surface of the display panel 210.

[0403] Reference Fig.24 , in an example where the pen 110 is located on or below the rear surface of the display panel 210 , light having the second wavelength output from the pen 110 may be incident on the first substrate 211 .

[0404] like Fig.24 As shown, in an example where the code pattern layer CPL includes the lower light active pattern DLRP and the filling layer FILL on the lower light active pattern DLRP, the pen 110 located on or below the rear surface of the display device 100 may also recognize one or more corresponding code patterns.

[0405] Therefore, pen touches (ie, input of pen touches) of one or more pens 110 may be implemented through the rear surface of the display device 100 .

[0406] Fig.25 is an example plan view of a display panel 210 in which a plurality of code patterns CP are disposed in a transmissive area TA according to aspects of the present disclosure.

[0407] Reference Fig.25 The display panel 210 includes a plurality of transmissive areas TA and a plurality of non-transmissive areas NTA. In one or more aspects, the pixel P may be disposed in the plurality of non-transmissive areas NTA, and the upper light active pattern ULRP or the lower light active pattern DLRP may be disposed in each of the plurality of transmissive areas TA.

[0408] Reference Fig.25 , one upper light active pattern ULRP or one lower light active pattern DLRP disposed in each of the plurality of transmission areas TA may include a plurality of openings OP serving as a plurality of code patterns CP.

[0409] Fig.26 Example light transmission spectra of color filters ( CF1 , CF2 , and CF3 ) provided in the display panel 210 according to aspects of the present disclosure are shown.

[0410] Reference Fig.26 In one or more example embodiments, the color filter layer CFL of the display panel 210 may include a first color filter CF1 capable of transmitting a first color light, a second color filter CF2 capable of transmitting a second color light, and a third color filter CF3 capable of transmitting a third color light.

[0411] Fig.26The transmission spectrum shows the respective transmittances of the first color filter CF1, the second color filter CF2, and the third color filter CF3 in the visible light band WB_VL of about 380nm to 780nm and the infrared band WB_IL of about 780nm to 1080nm. Here, the visible light band may be the first band, and the infrared band may be the second band.

[0412] Reference Fig.26 , the first color filter CF1 may transmit red light in the visible light band WB_VL, the second color filter CF2 may transmit green light in the visible light band WB_VL, and the third color filter CF3 may transmit blue light in the visible light band WB_VL.

[0413] Reference Fig.26 , the first color filter CF1 may transmit infrared light included in the infrared band WB_IL of about 780 nm to 1080 nm with high transmittance.

[0414] The second color filter CF2 may have high transmittance for infrared light having a wavelength greater than or equal to a first specific wavelength λa in an infrared band WB_IL of approximately 780nm to 1080nm, and may have low transmittance for infrared light having a wavelength in a band from 780nm to the first specific wavelength λa.

[0415] The third color filter CF3 may have a high transmittance for infrared light having a wavelength greater than or equal to a second specific wavelength λb in an infrared band WB_IL of about 780 nm to 1080 nm, and may have a low transmittance for infrared light having a wavelength in a band from 780 nm to the second specific wavelength λb. Here, the second specific wavelength λb may be shorter than the first specific wavelength λa.

[0416] The first to third color filters (CF1, CF2, and CF3) can completely transmit the light having the second wavelength output from the pen 110. Therefore, the second wavelength of the light output from the pen 110 can be set to a value equal to or greater than the first specific wavelength λa, wherein all of the first to third color filters (CF1, CF2, and CF3) have high transmittance. For example, the second wavelength may be 940nm or greater.

[0417] Therefore, such setting of the wavelength of light output from the pen 110 may enable improvement in pen touch sensing.

[0418] Fig. 27 yes Fig.11 FIG. 2 is a detailed cross-sectional view of an example of a display panel 210 .

[0419] Reference Fig. 27, the sub-pixel SP may be disposed in the non-transmission area NTA, and the transmission area TA may be disposed at one side of the non-transmission area NTA.

[0420] Reference Fig. 27 In one aspect, the sub-pixel SP may have Figure 4 According to this aspect, the sub-pixel SP may include a light emitting element ED, a driving transistor DRT, a sensing transistor SENT, a storage capacitor Cst and a scanning transistor SCT ( Fig. 27 not shown).

[0421] Reference Fig. 27 , a light shielding portion LS may be disposed on the first substrate 211. The light shielding portion LS may be disposed under the driving transistor DRT and may prevent a channel of the driving transistor DRT from being exposed to light.

[0422] Reference Fig. 27 , a portion of the light shielding portion LS may be used as a first capacitor electrode PLT1 of the storage capacitor Cst.

[0423] Reference Fig. 27 , a buffer layer 2702 may be disposed on the light shielding portion LS. An active layer ACT of the driving transistor DRT and an active layer ACTs of the sensing transistor SENT may be disposed on the buffer layer 2702.

[0424] A second capacitor electrode PLT2 of the storage capacitor Cst may also be provided on the buffer layer 2702. The second capacitor electrode PLT2 of the storage capacitor Cst may include the same semiconductor material as the active layers ACT and ACTs. For example, the semiconductor material may be an oxide semiconductor material or a silicon-based semiconductor material. For example, the second capacitor electrode PLT2 of the storage capacitor Cst may be an electrode including a semiconductor material capable of achieving conductivity. For example, the semiconductor material may be transformed into a material capable of achieving conductivity through an ion implantation process (also referred to as a doping process).

[0425] Reference Fig. 27 , a gate insulating layer 2704 may be disposed on the active layer ACT of the driving transistor DRT and the active layer ACTs of the sensing transistor SENT.

[0426] Reference Fig. 27 , a gate electrode G of the driving transistor DRT and a gate electrode Gs of the sensing transistor SENT may be disposed on the gate insulating layer 2704 .

[0427] Reference Fig. 27 , an interlayer insulating film 2706 may be provided on the gate electrode G of the driving transistor DRT and the gate electrode Gs of the sensing transistor SENT.

[0428] Reference Fig. 27 , a source electrode and a drain electrode (S and D) of the driving transistor DRT and a source electrode and a drain electrode (Ss and Ds) of the sensing transistor SENT may be disposed on the interlayer insulating layer 2706 .

[0429] The source electrode S and the drain electrode D of the driving transistor DRT may be connected to the active layer ACT of the driving transistor DRT through the contact hole of the interlayer insulating layer 2706. The source electrode Ss and the drain electrode Ds of the sensing transistor SENT may be connected to the active layer ACTs of the sensing transistor SENT through the contact hole of the interlayer insulating layer 2706.

[0430] The source electrode S of the driving transistor DRT and the source electrode Ss of the sensing transistor SENT may be electrically connected to each other or integrally formed as one piece.

[0431] In one or more aspects, the source electrode S of the driving transistor DRT and the source electrode Ss of the sensing transistor SENT may be electrically connected to the third capacitor electrode PLT3 of the storage capacitor Cst. In one or more aspects, the source electrode S of the driving transistor DRT, the source electrode Ss of the sensing transistor SENT, and the third capacitor electrode PLT3 of the storage capacitor Cst may be integrally formed as one piece.

[0432] The storage capacitor Cst may include a first capacitor electrode PLT1 , a second capacitor electrode PLT2 , and a third capacitor electrode PLT3 .

[0433] In the storage capacitor Cst, the first and third capacitor electrodes PLT1 and PLT3 may be electrically connected to the source electrode S of the driving transistor DRT, and the second capacitor electrode PLT2 may be electrically connected to the gate electrode G of the driving transistor DRT.

[0434] Therefore, the storage capacitor Cst formed between the source electrode S and the gate electrode G of the driving transistor DRT may have a structure in which a first capacitor C1 between the first and second capacitor electrodes PLT1 and PLT2 and a second capacitor C2 between the second and third capacitor electrodes PLT2 and PLT3 are connected in parallel to each other.

[0435] Reference Fig. 27 A first protective layer 2708 may be disposed on the source and drain electrodes (S and D) of the driving transistor DRT and the source and drain electrodes (Ss and Ds) of the sensing transistor SENT, and a second protective layer 2710 may be disposed on the first protective layer 2708. A planarization layer 2712 may be disposed on the second protective layer 2710.

[0436] Reference Fig. 27, a pixel electrode PE of the light emitting element ED may be disposed on the planarization layer 2712 .

[0437] The pixel electrode PE of the light emitting element ED may be electrically connected to the source electrode S of the driving transistor DRT through the contact hole of the planarization layer 2712 , the contact hole of the second protective layer 2710 , and the contact hole of the first protective layer 2708 .

[0438] Reference Fig. 27 , a bank 2714 may be provided on the pixel electrode PE of the light emitting element ED, and the bank 2714 may include an opening exposing a portion of the pixel electrode PE.

[0439] Reference Fig. 27 The bank 2714 may be provided not only in the non-transmission area NTA but also in the transmission area TA. An element intermediate layer EL and a common electrode CE may be provided on the bank 2714. The element intermediate layer EL may include a first common layer CL1, a light emitting layer EML, and a second common layer CL2.

[0440] The first common layer CL1 may be disposed on the bank 2714. In one aspect, a portion of the first common layer CL1 may be disposed on a portion of the pixel electrode PE in the opening of the bank 2714. For example, the first common layer CL1 may be disposed on the bank 2714 and may also be disposed on a portion of the pixel electrode PE exposed through the opening of the bank 2714.

[0441] The light emitting layer EML may be disposed on the first common layer CL1 and in a region where the light emitting element ED is disposed. The light emitting layer EML may be disposed on the first common layer CL1, overlap the opening of the bank 2714, and overlap the pixel electrode PE.

[0442] The second common layer CL2 may be disposed on the light emitting layer EML. The second common layer CL2 may extend to a region where the light emitting layer EML does not exist, and be disposed on the first common layer CL1.

[0443] The light emitting layer EML may be disposed only in a region where the light emitting element ED is configured in a corresponding sub-pixel SP. The first common layer CL1, the second common layer CL2, and the common electrode CE may be disposed not only in the non-transmission area NTA but also in the transmission area TA.

[0444] Reference Fig. 27 , the light emitting element ED may be formed of a stacked configuration in which the pixel electrode PE, the first common layer CL1 , the light emitting layer EML, the second common layer CL2 , and the common electrode CE overlap each other.

[0445] Reference Fig. 27, a stacked structure in which transistors (DRT and SENT), at least one capacitor Cst1, and at least one light emitting element ED are stacked may correspond to the pixel array layer 610. Many metals used as respective electrodes of the transistors (DRT and SENT), at least one capacitor Cst1, and at least one light emitting element ED may be provided in the pixel array layer 610.

[0446] Reference Fig. 27 , a filling layer FILL may be disposed on the common electrode CE, and an outer coating layer 2718 may be disposed on the filling layer FILL.

[0447] A color filter layer CFL may be disposed on the overcoat layer 2718 .

[0448] The color filter layer CFL may include at least one color filter CF. The color filter layer CFL may further include a black matrix BM disposed at at least one side of the at least one color filter CF.

[0449] The color filter layer CF may overlap the light emitting element ED. The color filter CF may overlap the light emitting area EA formed by the light emitting element ED.

[0450] Reference Fig. 27 , a second substrate 2720 may be disposed on the color filter layer CFL. In one aspect, the second substrate 2720 may be an encapsulation layer 630, and may also be referred to as an encapsulation substrate.

[0451] Reference Fig. 27 , a code pattern layer CPL may be configured between the common electrode CE and the outer coating layer 2718 .

[0452] Reference Fig. 27 The code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. The light active pattern LRP may include a lower light active pattern DLRP and an upper light active pattern ULRP.

[0453] The lower light active pattern DLRP may be located on the common electrode CE.

[0454] The filling layer FILL may be configured to cover the lower light active pattern DLRP, and may be located between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0455] The upper light active pattern ULRP may be located on the filling layer FILL.

[0456] Reference Fig. 27 , the upper light active pattern ULRP and the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0457] Reference Fig. 27 , at least a portion of the upper light active pattern ULRP may overlap at least a portion of the lower light active pattern DLRP.

[0458] The light active pattern LRP including the lower light active pattern DLRP and the upper light active pattern ULRP may not overlap with the emission area EA. The light active pattern LRP including the lower light active pattern DLRP and the upper light active pattern ULRP may not overlap with the color filter CF. Fig. 27 In an example in which the display panel 210 has a top emission structure, among the first electrode (e.g., pixel electrode PE) and the second electrode (e.g., common electrode CE) included in the light-emitting element ED, the first electrode (pixel electrode PE1) close to the first substrate 211 may be a reflective electrode, while the second electrode (common electrode CE) farther away from the first substrate 211 may be a transparent electrode.

[0459] Reference Fig. 27 In the display panel 210 having a top emission structure, a light active pattern LRP configured to form a code pattern may be disposed in the transmission area TA. The light active pattern LRP may include a light active material having a property of responding to light having a second wavelength and also transmitting visible light (light having a first wavelength). Therefore, optical pen touch sensing may be implemented through the transmission area TA without reducing the transmittance of the transmission area TA.

[0460] like Fig. 27 As shown, in an example in which the light active pattern LRP includes both the lower light active pattern DLRP and the upper light active pattern ULRP, a pen touch input may be implemented through the front and rear surfaces of the display device 100 .

[0461] Fig.28 yes Fig.14 Detailed cross-sectional view of an example of a display panel 210. It should be noted that Fig.28 The vertical structure in the cross-section diagram is Fig. 27 The vertical structures in the cross-sectional views of are substantially the same. Considering this similarity, the following will focus on Fig. 27 Examples of different features to provide Fig.28 Discussion of examples.

[0462] Reference Fig.28 , the code pattern layer CPL may be configured between the common electrode CE and the overcoat layer 2718 .

[0463] See also Fig.28 The code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. The light active pattern LRP may include an upper light active pattern ULRP.

[0464] The filling layer FILL may be located on the common electrode CE.

[0465] The upper light active pattern ULRP may be located on the filling layer FILL.

[0466] Reference Fig.28 , the upper light active pattern ULRP may be disposed in the transmission area TA. The filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0467] like Fig.28 As shown, in an example in which the light active pattern LRP includes an upper light active pattern ULRP, a pen touch input may be implemented through the front surface of the display device 100 .

[0468] Fig.29 yes Fig.17 Detailed cross-sectional view of an example of a display panel 210. It should be noted that Fig.29 The vertical structure in the cross-section diagram is Fig. 27 The vertical structures in the cross-sectional views of are substantially the same. Considering this similarity, the following will focus on Fig. 27 Examples of different features to provide Fig.29 Discussion of examples.

[0469] Reference Fig.29 , the code pattern layer CPL may be configured between the common electrode CE and the overcoat layer 2718 .

[0470] See also Fig.29 The code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. The light active pattern LRP may include a lower light active pattern DLRP.

[0471] The lower light active pattern DLRP may be located on the common electrode CE.

[0472] The filling layer FILL may be located between the common electrode CE and the overcoat layer 2718 and may be configured to cover the lower light active pattern DLRP.

[0473] Reference Fig.29 , the lower light active pattern DLRP may be disposed in the transmission area TA. The filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0474] like Fig.29 As shown, in an example in which the light active pattern LRP includes the lower light active pattern DLRP, a pen touch input may be implemented through the rear surface of the display device 100 .

[0475] Fig.30 yes Fig. 20Detailed cross-sectional view of an example of a display panel 210. It should be noted that Fig.30 The vertical structure in the cross-section diagram is Fig. 27 The vertical structures in the cross-sectional views of are substantially the same. Considering this similarity, the following will focus on Fig. 27 Examples of different features to provide Fig.30 Discussion of examples.

[0476] Reference Fig.30 , the code pattern layer CPL may be configured between the common electrode CE and the overcoat layer 2718 .

[0477] Reference Fig.30 The code pattern layer CPL may include a filling layer FILL and at least one light active pattern LRP. The light active pattern LRP may include an upper light active pattern ULRP and a lower light active pattern DLRP.

[0478] The lower light active pattern DLRP may be located on the common electrode CE.

[0479] The filling layer FILL may be configured to cover the lower light active pattern DLRP, and may be located between the lower light active pattern DLRP and the upper light active pattern ULRP.

[0480] The upper light active pattern ULRP may be located on the filling layer FILL.

[0481] Reference Fig.30 , the upper light active pattern ULRP and the lower light active pattern DLRP may be disposed in the transmission area TA, and the filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0482] Reference Fig.30 , the upper light active pattern DLRP and the lower light active pattern ULRP may not overlap each other. For example, the position of the upper light active pattern ULRP and the position of the lower light active pattern DLRP may be symmetrical about the center line Lc of the transmission area TA.

[0483] As described above, in one or more aspects, in order to make a pen (e.g., Figure 3A The pen 110) recognizes one or more code patterns CP for pen touch sensing, the display panel 210 may include a light control structure, which includes two or more of the following: a reflective structure, which is configured to reflect light with a second wavelength emitted from the pen 110; an absorption structure, which is configured to absorb the light with the second wavelength; and a radiation structure, which is configured to convert into light with one or more other wavelengths different from the second wavelength, and thereafter radiate light with one or more other wavelengths.

[0484] In one or more aspects, the display panel 210 may include both of a reflective structure, an absorptive structure, and a radiative structure as first and second light-controlling structures for forming one or more code patterns.

[0485] For example, the first light control structure may be a light active pattern LRP including a first light active material, and the second light control structure may be a filling layer FILL including the first light active material.

[0486] In the display panel 210 according to the exemplary embodiment of the present disclosure described above, in one aspect, both the first light-controlling structure and the second light-controlling structure may be provided in the code pattern layer CPL.

[0487] In another aspect, one of the first light-controlling structure and the second light-controlling structure may be disposed inside the code pattern layer CPL, and the other may be disposed outside the code pattern layer CPL.

[0488] Hereinafter, a discussion of an example in which one of the first light-controlling structure and the second light-controlling structure is disposed inside the code pattern layer CPL and the other is disposed outside the code pattern layer CPL is provided.

[0489] Fig.31 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0490] Reference Fig.31 , the code pattern layer CPL may include a lower light active pattern DLRP as a first light control structure on the first substrate 211. The lower light active pattern DLRP may include a photoactive material (eg, a first photoactive material).

[0491] The photoactive material (e.g., the first photoactive material) included in the lower photoactive pattern DLRP may include one of the following: an absorption material capable of absorbing light having a second wavelength; a reflection material capable of reflecting light having a second wavelength; and a radiation material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and thereafter radiating light having one or more other wavelengths. For example, the photoactive material (e.g., the first photoactive material) included in the lower photoactive pattern DLRP may include an absorption material or a radiation material.

[0492] The filling layer FILL may be located on the lower light active pattern DLRP and may not include a photo active material.

[0493] Reference Fig.31 The display panel 211 may further include a light active layer LRL located outside the code pattern layer CPL as a second light control structure.

[0494] The photoactive layer LRL may be located under the first substrate 211, include a photoactive material (eg, a second photoactive material), and respond to light having a second wavelength. For example, the photoactive layer LRL may include a reflective material that reflects light having a second wavelength.

[0495] Reference Fig.31 , the photoactive layer LRL may be disposed in the plurality of transmissive areas TA and the plurality of non-transmissive areas NTA. Since the photoactive layer LRL for pen touch sensing extends to the plurality of non-transmissive areas NTA, light having the first wavelength emitted from one or more light emitting elements ED may be prevented from leaving the rear surface of the display panel 210. Therefore, the performance of the display panel 210 for redirecting light emitted from one or more light emitting elements ED to move toward the front of the display panel 210 may be improved.

[0496] Reference Fig.31 , due to the lower light active pattern DLRP, in the case of being provided by a pen (eg, Figure 3A A chromaticity difference or a wavelength difference may appear in the distribution of the infrared light of the redirected light received by the pen 110. Therefore, the pen 110 located on or above the front surface of the display device 100 can recognize one or more corresponding code patterns CP by detecting the chromaticity difference in the distribution of the infrared light as the redirected light.

[0497] Fig.32 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0498] Reference Fig.32 , the code pattern layer CPL may include an upper light active pattern ULRP on the filling layer FILL. The upper light active pattern ULRP may include a photo active material.

[0499] The photoactive material included in the upper photoactive pattern ULRP may include one of the following: an absorption material capable of absorbing light having the second wavelength; a reflection material capable of reflecting light having the second wavelength; and a radiation material capable of converting light having the second wavelength into light having one or more other wavelengths different from the second wavelength and thereafter radiating light having the one or more other wavelengths. For example, the photoactive material included in the upper photoactive pattern ULRP may include an absorption material or a radiation material.

[0500] The filling layer FILL may not include photoactive material.

[0501] Reference Fig.32The display panel 211 may further include a photoactive layer LRL located below the first substrate 211 and responsive to light having a second wavelength. The photoactive layer LRL may include a photoactive material. For example, the photoactive layer LRL may include a reflective material that reflects light having a second wavelength.

[0502] Reference Fig.32 , the photoactive layer LRL may be disposed in the plurality of transmissive areas TA and the plurality of non-transmissive areas NTA. Since the photoactive layer LRL for pen touch sensing extends to the plurality of non-transmissive areas NTA, light having the first wavelength emitted from one or more light emitting elements ED may be prevented from leaving the rear surface of the display panel 210. Therefore, the performance of the display panel 210 for redirecting light emitted from one or more light emitting elements ED to move toward the front of the display panel 210 may be improved.

[0503] Reference Fig.32 , since the upper light active pattern ULRP is formed by a pen (eg, Figure 3A Therefore, the pen 110 located on or above the front surface of the display device 100 can identify one or more corresponding code patterns CP by detecting the chromaticity difference in the distribution of the infrared light as the redirected light.

[0504] Fig.33 is an example plan view of a display panel 210 in which a plurality of code patterns CP are disposed in a transmissive area TA according to aspects of the present disclosure.

[0505] Fig.33 It shows that Fig.31 or Fig.32 A plan view of a display panel 210 configured to have a vertical structure is shown.

[0506] Reference Fig.33 The photoactive layer LRL may be located under the first substrate 211, and may be disposed in both the plurality of transmission areas TA and the plurality of non-transmission areas NTA.

[0507] A plurality of upper light active patterns ULRP and / or a plurality of lower light active patterns DLRP may be disposed in each of the plurality of transmission areas TA.

[0508] This can be done by pen (e.g. Figure 3A The pen 110) recognizes the plurality of upper light active patterns ULRP and / or the plurality of lower light active patterns DLRP as a plurality of code patterns CP.

[0509] Reference Fig.33 and Figure 7 , Fig.33 At least some of the photoactive patterns (ULRPs or DLRPs) shown may correspond to a code pattern CP_CELL set in two or more data cell regions D-CELL, to a code pattern CP_CELL set in one data cell region D-CELL, or to a code pattern CP_CELL set in a portion of one data cell region D-CELL.

[0510] in addition, Fig.33 Some of the illustrated photo active patterns (ULRPs or DLRPs) may correspond to code patterns (CP_CGL1, CP_CGL2) corresponding to first and second cell guide lines (CGL1, CGL2) around the data cell region D-CELL.

[0511] Fig.34 yes Fig.31 Detailed cross-sectional view of an example of a display panel 210. Fig. 27 The cross-sectional view of the different features provides Fig.34 Discussion of the cross-sectional diagram.

[0512] Reference Fig.34 , the code pattern layer CPL may include a lower light active pattern DLRP as a first light control structure.

[0513] The lower light active pattern DLRP may be located on the common electrode CE.

[0514] A filling layer FILL may be disposed on the lower light active pattern DLRP.

[0515] The lower light active pattern DLRP may be disposed only in the transmission area TA.

[0516] The filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0517] The filling layer FILL may not include photoactive material.

[0518] The lower light active pattern DLRP may include a light active material (eg, a first light active material) that responds to light having a second wavelength. When the lower light active pattern DLRP is used, a pen (eg, Figure 3A The pen 110) can recognize the corresponding one or more code patterns CP.

[0519] Reference Fig.34 , the display panel 210 may include a photoactive layer LRL as a second light control structure.

[0520] The photoactive layer LRL may be located under the first substrate 211 .

[0521] The photoactive layer LRL may include a photoactive material (eg, a second photoactive material) that responds to light having a second wavelength.

[0522] The first photo active material included in the lower photo active pattern DLRP and the second photo active material included in the photo active layer LRL may be different materials.

[0523] The first photo active material included in the lower photo active pattern DLRP and the second photo active material included in the photo active layer LRL may be materials that perform different photo activations.

[0524] For example, the first photoactive material included in the lower photoactive pattern DLRP may be an absorption material capable of absorbing light having the second wavelength, and the second photoactive material included in the photoactive layer LRL may be a reflective material capable of reflecting light having the second wavelength. Figure 3A The pen 110) can identify one or more corresponding code patterns CP by detecting chromaticity differences in the distribution of redirected light.

[0525] Fig.35 yes Fig.32 FIG. 2 is a detailed cross-sectional view of an example of a display panel 210 .

[0526] Reference Fig.35 , the code pattern layer CPL may include an upper light active pattern ULRP as a first light control structure.

[0527] The upper light active pattern ULRP may be located below the second substrate 2720, which may be an encapsulation layer. For example, the upper light active pattern ULRP may be located below the overcoat layer 2718 below the second substrate 2720.

[0528] The filling layer FILL may be located on the common electrode CE.

[0529] The upper light active pattern ULRP may be located on the filling layer FILL.

[0530] The upper light active pattern ULRP may be disposed only in the transmission area TA.

[0531] The filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0532] The filling layer FILL may not include photoactive material.

[0533] The upper light active pattern ULRP may include a light active material (eg, a first light active material) that responds to light having a second wavelength. When using the upper light active pattern ULRP, a pen (eg, Figure 3A The pen 110) can recognize one or more corresponding code patterns CP.

[0534] Reference Fig.35 , the display panel 210 may include a photoactive layer LRL as a second light control structure.

[0535] The photoactive layer LRL may be located under the first substrate 211 .

[0536] The photoactive layer LRL may include a photoactive material (eg, a second photoactive material) that responds to light having a second wavelength.

[0537] The first photo active material included in the upper photo active pattern ULRP and the second photo active material included in the photo active layer LRL may be different materials.

[0538] The first photo active material included in the upper photo active pattern ULRP and the second photo active material included in the photo active layer LRL may be materials that perform different photo activations.

[0539] For example, the first photoactive material included in the upper photoactive pattern ULRP may be an absorption material capable of absorbing light having the second wavelength, and the second photoactive material included in the photoactive layer LRL may be a reflection material capable of reflecting light having the second wavelength. Figure 3A The pen 110) can identify one or more corresponding code patterns CP by detecting chromaticity differences in the distribution of redirected light.

[0540] Fig.36 is an example cross-sectional view of a display panel 210 according to aspects of the present disclosure. Fig.37 is an example plan view of a display panel 210 in which a plurality of code patterns CP are disposed in a transmissive area TA according to aspects of the present disclosure.

[0541] Reference Fig.36 and Fig.37 , the code pattern layer CPL may include a lower light active pattern DLRP as a first light control structure on the first substrate 211. The lower light active pattern DLRP may include a photoactive material (eg, a first photoactive material).

[0542] The photoactive material (e.g., the first photoactive material) included in the lower photoactive pattern DLRP may include one of the following: an absorption material capable of absorbing light having a second wavelength; a reflection material capable of reflecting light having a second wavelength; and a radiation material capable of converting light having a second wavelength into light having one or more other wavelengths different from the second wavelength and thereafter radiating light having one or more other wavelengths. For example, the photoactive material (e.g., the first photoactive material) included in the lower photoactive pattern DLRP may include an absorption material or a radiation material.

[0543] The filling layer FILL may be located on the lower light active pattern DLRP and may not include a photo active material.

[0544] Reference Fig.36 and Fig.37 , one lower light active pattern DLRP may be disposed in each of the plurality of transmission areas TA.

[0545] Reference Fig.36 and Fig.37 , a plurality of openings OP may be formed in one lower light active pattern DLRP disposed in each of the plurality of transmission areas TA.

[0546] The plurality of openings OP may be used as the plurality of code patterns CP. When the above configuration is applied, a chromaticity difference or a wavelength difference occurs in the distribution of the redirected light due to the plurality of openings OP, and thus the pen (eg, Figure 3A The pen 110) can recognize multiple code patterns CP.

[0547] Reference Fig.36 and Fig.37 The display panel 211 may further include a light active layer LRL located outside the code pattern layer CPL as a second light control structure.

[0548] The photoactive layer LRL may be located under the first substrate 211, include a photoactive material (eg, a second photoactive material), and respond to light having a second wavelength. For example, the photoactive layer LRL may include a reflective material that reflects light having a second wavelength.

[0549] The photoactive layer LRL may be disposed in the plurality of transmissive areas TA and the plurality of non-transmissive areas NTA. Therefore, when the photoactive layer LRL for pen touch sensing extends to the plurality of non-transmissive areas NTA, light having the first wavelength emitted from the light emitting element ED may be prevented from escaping from the back side of the display panel 210. Therefore, the performance of the display panel 210 for redirecting the light emitted from the light emitting element ED to move toward the front side of the display panel 210 may be improved.

[0550] Reference Fig.36 and Fig.37 Due to the opening OP of the lower light active pattern DLRP, when a pen (eg, Figure 3A A chromaticity difference or a wavelength difference may appear in the distribution of the infrared light of the redirected light received by the pen 110. Therefore, the pen 110 located on or above the front surface of the display device 100 can identify one or more corresponding code patterns CP by detecting the chromaticity difference in the distribution of the infrared light as the redirected light.

[0551] Reference Fig.37 and Figure 7 ,exist Fig.37 At least some of the openings OP formed in the lower light active pattern DLRP shown may correspond to a code pattern CP_CELL set in two or more data cell regions D-CELL, to a code pattern CP_CELL set in one data cell region D-CELL, or to a code pattern CP_CELL set in a portion of one data cell region D-CELL.

[0552] In addition, Fig.37 Some of the openings OP formed in the illustrated lower light active pattern DLRP may correspond to code patterns (CP_CGL1, CP_CGL2) corresponding to the first and second cell guide lines (CGL1, CGL2) around the data cell region D-CELL.

[0553] Fig.38 yes Fig.36 Detailed cross-sectional view of an example of a display panel 210. Fig. 27 The cross-sectional view of the different features provides Fig.38 Discussion of the cross-sectional diagram.

[0554] Reference Fig.38 , the code pattern layer CPL may include a lower light active pattern DLRP as a first light control structure.

[0555] The lower light active pattern DLRP may be located on the common electrode CE.

[0556] A filling layer FILL may be disposed on the lower light active pattern DLRP.

[0557] The lower light active pattern DLRP may be disposed only in the transmission area TA.

[0558] The filling layer FILL may be disposed in both the transmission area TA and the non-transmission area NTA.

[0559] The filling layer FILL may not include photoactive material.

[0560] The lower light active pattern DLRP may include a photo active material (eg, a first photo active material) responsive to light having a second wavelength.

[0561] One lower light active pattern DLRP may be disposed in each of the plurality of transmission areas TA.

[0562] One lower light active pattern DLRP disposed in each of the plurality of transmission areas TA may include a plurality of openings OP. Figure 3A The pen 110) can recognize one or more corresponding code patterns CP through the plurality of openings OP.

[0563] Reference Fig.38 , the display panel 210 may include a photoactive layer LRL as a second light control structure.

[0564] The photoactive layer LRL may be located under the first substrate 211 .

[0565] The photoactive layer LRL may include a photoactive material (eg, a second photoactive material) that responds to light having a second wavelength.

[0566] The first photo active material included in the lower photo active pattern DLRP and the second photo active material included in the photo active layer LRL may be different materials.

[0567] The first photo active material included in the lower photo active pattern DLRP and the second photo active material included in the photo active layer LRL may be materials that perform different photo activations.

[0568] For example, the first photoactive material included in the lower photoactive pattern DLRP may be an absorption material capable of absorbing light having the second wavelength, and the second photoactive material included in the photoactive layer LRL may be a reflective material capable of reflecting light having the second wavelength. Figure 3A The pen 110) can identify one or more corresponding code patterns CP by detecting chromaticity differences in the distribution of redirected light.

[0569] The example implementations described herein can be briefly discussed as follows.

[0570] According to example embodiments of the present disclosure, there may be provided a display device including a display panel configured to display an image.

[0571] In one or more aspects, the display panel may include: a first substrate including a plurality of transmission areas allowing transmission of light having a first wavelength and a plurality of non-transmission areas different from the plurality of transmission areas; a plurality of pixels arranged in the plurality of non-transmission areas; a code pattern layer, in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is arranged, and at least one photoactive pattern is arranged in at least one of the plurality of transmission areas; and a cover window located on the plurality of pixels and the code pattern layer.

[0572] In one or more aspects, the photoactive material may include one or more of the following: an absorption material capable of absorbing light having a second wavelength; a reflective material capable of reflecting light having the second wavelength; and a radiation material capable of converting light having the second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths.

[0573] For example, at least one photoactive pattern may include a lower photoactive pattern located on the first substrate and an upper photoactive pattern located above the lower photoactive pattern, and the code pattern layer may further include a filling layer located between the lower photoactive pattern DLRP and the upper photoactive pattern. In one or more aspects, the upper photoactive pattern and the lower photoactive pattern may include a first photoactive material, and the filling layer may include a second photoactive material that performs a different photoactivation than the first photoactive material.

[0574] In one or more aspects, light having the second wavelength may be incident on the cover window or on the first substrate.

[0575] In one or more aspects, at least a portion of the upper photoactive pattern can overlap at least a portion of the lower photoactive pattern.

[0576] In one or more aspects, the upper photoactive pattern may not overlap the lower photoactive pattern.For example, the location of the upper photoactive pattern and the location of the lower photoactive pattern may be symmetrical about a center line of a corresponding one of the plurality of transmissive regions.

[0577] In one or more aspects, each of the upper and lower photoactive patterns can include at least one opening.

[0578] In one or more aspects, the openings of the upper photoactive pattern and the openings of the lower photoactive pattern can vertically overlap each other.

[0579] In one or more aspects, the openings of the upper photoactive pattern and the openings of the lower photoactive pattern may not vertically overlap each other.

[0580] In another example, the code pattern layer may further include a filling layer on the first substrate, and the at least one photoactive pattern may include an upper photoactive pattern on the filling layer. In one or more aspects, the upper photoactive pattern may include a first photoactive material, and the filling layer may include a second photoactive material that performs a different photoactivation than the first photoactive material.

[0581] In one or more aspects, light having a second wavelength can be incident on the cover window.

[0582] In one or more aspects, the upper photoactive pattern can include at least one opening.

[0583] In another example, at least one photoactive pattern may include a lower photoactive pattern located on the first substrate. In one or more aspects, the code pattern layer may further include a filling layer located on the lower photoactive pattern. In one or more aspects, the lower photoactive pattern may include a first photoactive material. In one or more aspects, the filling layer may include a second photoactive material that performs a different photoactivation than the first photoactive material.

[0584] In one or more aspects, light having a second wavelength can be incident on the first substrate.

[0585] In one or more aspects, the lower photoactive pattern can include at least one opening.

[0586] In one or more aspects, the plurality of pixels may further include a plurality of light emitting elements, and the display panel may further include an encapsulation layer on the plurality of light emitting elements.

[0587] In one or more aspects, a cover window can be located on the encapsulation layer.

[0588] In one or more aspects, the code pattern layer may be located between the first substrate and the encapsulation layer.

[0589] In one or more aspects, the display panel may further include: a plurality of color filters disposed in each of the plurality of non-transmission regions and located on or over the encapsulation layer or under or below the encapsulation layer.

[0590] In one or more aspects, each of the plurality of color filters may be configured to transmit light having one or more wavelengths included in a first wavelength band that includes the first wavelength and corresponds to a corresponding color.

[0591] In one or more aspects, each of the plurality of color filters may include a material capable of transmitting light having the second wavelength.

[0592] In one or more aspects, in the plurality of transmission regions, transmittance of light having the second wavelength may be lower than transmittance of light having the first wavelength.

[0593] In one or more aspects, the display panel may further include a photoactive layer beneath the first substrate and responsive to light having the second wavelength.

[0594] In one or more aspects, at least one photoactive pattern can be located on the substrate, and the photoactive layer can include a reflective material that reflects light having the second wavelength.

[0595] In one or more aspects, at least one photoactive pattern may include an absorptive material capable of absorbing light having a second wavelength, or a radiative material capable of converting light of the second wavelength into light having one or more other wavelengths different from the second wavelength and radiating light having one or more other wavelengths.

[0596] In one or more aspects, the photoactive layer can be disposed in a plurality of transmissive regions and a plurality of non-transmissive regions.

[0597] In one or more aspects, at least one photoactive pattern can include a plurality of openings.

[0598] According to an example embodiment of the present disclosure, there may be provided a pen touch system including a display device (which may be, for example but not limited to, the display device according to one or more aspects described above) and a pen.

[0599] In one or more aspects, a display device may include: a first substrate including a plurality of transmission areas allowing transmission of light having a first wavelength and a plurality of non-transmission areas different from the plurality of transmission areas; a plurality of pixels arranged in the plurality of non-transmission areas; a code pattern layer, in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is arranged, and the at least one photoactive pattern is arranged in at least one of the plurality of transmission areas; and a cover window located on the plurality of pixels and the code pattern layer.

[0600] In one or more aspects, the pen can be configured to: output light having a second wavelength to at least one of a plurality of transmission areas; receive redirected light from a display device; and output sensing data to the display device based on the redirected light.

[0601] In one or more aspects, the plurality of pixels may further include a plurality of light emitting elements, and the display device may further include an encapsulation layer on the plurality of light emitting elements.

[0602] In one or more aspects, a cover window can be located on the encapsulation layer.

[0603] In one or more aspects, the code pattern layer may be located between the first substrate and the encapsulation layer.

[0604] In one or more aspects, a plurality of light emitting elements may emit light toward one of the first substrate and the cover window, and the display device may allow the pen to input through both the front and rear surfaces of the display device based on sensing data received from the pen.

[0605] In one or more aspects, a plurality of light emitting elements may emit light toward one of the first substrate and the cover window, and the display device may allow the pen to input through any one of the front and rear surfaces of the display device based on sensing data received from the pen.

[0606] According to one or more aspects described herein, a display device and a pen touch system capable of more accurately sensing a pen touch based on an optical technology may be provided.

[0607] According to one or more aspects described herein, a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology are provided.

[0608] According to one or more aspects described herein, a transparent display device and a pen touch system capable of providing optical pen touch sensing without affecting a pixel structure for image display may be provided.

[0609] According to one or more aspects described herein, a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology without deteriorating transparency may be provided.

[0610] According to one or more aspects described herein, a display device and a pen touch system including a display panel in which a light control structure enabling a pen to sense a touch is integrated may be provided.

[0611] According to one or more aspects described herein, a display device and a pen touch system including a display panel in which a light control structure configured not to affect light emitting performance of image display is integrated may be provided.

[0612] According to one or more aspects described herein, a display device and a pen touch system may be provided that include a display panel in which a light control structure, a reflective structure, and an absorption structure (or a radiation structure) configured to implement pen touch sensing are integrated.

[0613] According to one or more aspects described herein, a display device and a pen touch system capable of enabling a pen touch input from any one of a front surface and a rear surface of the display device may be provided.

[0614] According to one or more aspects described herein, a display device and a pen touch system capable of enabling pen touch input from both the front and rear surfaces of the display device may be provided.

[0615] According to one or more aspects described herein, a display device and a pen touch system including a display panel in which a light control structure configured to enable pen sensing touch is integrated can be provided, thereby providing the advantages of reducing the thickness of the display device and helping to simplify the assembly process of the display device. Therefore, one or more aspects described herein can help reduce weight and optimize the process of the display device.

[0616] According to one or more aspects described herein, a display device and a pen touch system may be provided that include a display panel that includes a pixel array layer and has a reflective structure for pen touch sensing using the pixel array layer, thereby providing an advantage of further contributing to reducing the weight of the display device.

[0617] The example embodiments of the present disclosure described above are described for illustrative purposes; those skilled in the art will appreciate that various modifications, additions, and substitutions are possible without departing from the scope and spirit of the present invention disclosed in the appended claims. Although the exemplary embodiments have been described for illustrative purposes, those skilled in the art will appreciate that various modifications and applications are possible without departing from the essential features of the present disclosure. For example, various modifications may be made to specific components of the exemplary embodiments.

Claims

1. A display device, comprising: a display panel configured to display an image, Wherein, the display panel comprises: a first substrate including a plurality of transmission areas allowing light having a first wavelength to be transmitted and a plurality of non-transmission areas different from the plurality of transmission areas; a plurality of pixels disposed in the plurality of non-transmission regions; a code pattern layer in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is disposed, the at least one photoactive pattern being disposed in at least one of the plurality of transmissive regions; and A cover window is located on the plurality of pixels and the code pattern layer.

2. The display device according to claim 1, wherein: The photoactive material includes one or more of the following: an absorption material capable of absorbing light having the second wavelength; a reflection material capable of reflecting light having the second wavelength; and a radiation material capable of converting light having the second wavelength into light having one or more other wavelengths and radiating light having the one or more other wavelengths.

3. The display device according to claim 1, wherein: the at least one photoactive pattern comprising a lower photoactive pattern on the first substrate and an upper photoactive pattern above the lower photoactive pattern, Wherein, the code pattern layer further includes a filling layer located between the lower light active pattern and the upper light active pattern, and Wherein the upper photoactive pattern and the lower photoactive pattern include a first photoactive material, and the fill layer includes a second photoactive material that performs a different photoactivation than the first photoactive material.

4. The display device according to claim 3, wherein: At least a portion of the upper photoactive pattern overlaps at least a portion of the lower photoactive pattern.

5. The display device according to claim 3, wherein: The upper photoactive pattern does not overlap the lower photoactive pattern, and Wherein, the position of the upper light active pattern and the position of the lower light active pattern are symmetrical about a center line of a corresponding transmission area among the plurality of transmission areas.

6. The display device according to claim 3, wherein: Light having the second wavelength is incident on the cover window or on the first substrate.

7. The display device according to claim 1, wherein: The code pattern layer further includes a filling layer located on the first substrate, wherein the at least one photoactive pattern comprises an upper photoactive pattern located on the filling layer, and Wherein the upper photoactive pattern comprises a first photoactive material, and the fill layer comprises a second photoactive material that performs a different photoactivation than the first photoactive material.

8. The display device according to claim 7, wherein: Light having the second wavelength is incident on the cover window.

9. The display device according to claim 1, wherein: the at least one photoactive pattern comprising a lower photoactive pattern on the first substrate, Wherein, the code pattern layer further comprises a filling layer located on the lower light-active pattern, and Wherein the lower photoactive pattern comprises a first photoactive material, and the fill layer comprises a second photoactive material that performs a different photoactivation than the first photoactive material.

10. The display device according to claim 9, wherein: Light having the second wavelength is incident on the first substrate.

11. The display device according to claim 1, wherein: The plurality of pixels further include a plurality of light emitting elements, and the display panel further includes an encapsulation layer on the plurality of light emitting elements, and Wherein, the cover window is located on the packaging layer, and the code pattern layer is located between the first substrate and the packaging layer.

12. The display device according to claim 11, wherein: The display panel further includes: a plurality of color filters disposed in each of the plurality of non-transmission regions and located on or above the encapsulation layer or under or below the encapsulation layer, wherein each of the plurality of color filters is configured to transmit light having one or more wavelengths included in a first wavelength band that includes the first wavelength and corresponds to a corresponding color, and Each of the plurality of color filters includes a material capable of transmitting light having the second wavelength.

13. The display device according to claim 1, wherein: In the plurality of transmission regions, transmittance of light having the second wavelength is lower than transmittance of light having the first wavelength.

14. The display device according to claim 1, wherein: The display panel further includes a photoactive layer disposed below the first substrate and responsive to light having the second wavelength. wherein the at least one photoactive pattern is located on the first substrate, and Wherein, the photoactive layer includes a reflective material capable of reflecting light having the second wavelength, and the at least one photoactive pattern includes an absorption material capable of absorbing light having the second wavelength, or a radiation material capable of converting light having the second wavelength into light having one or more other wavelengths and radiating light having the one or more other wavelengths.

15. The display device according to claim 14, wherein: The photoactive layer is disposed in the plurality of transmission regions and the plurality of non-transmission regions.

16. The display device according to claim 14, wherein: The at least one photoactive pattern includes a plurality of openings.

17. A pen touch system comprising: A display device, comprising: a first substrate, comprising a plurality of transmission areas allowing transmission of light having a first wavelength and a plurality of non-transmission areas different from the plurality of transmission areas; a plurality of pixels, which are arranged in the plurality of non-transmission areas; a code pattern layer, in which at least one photoactive pattern including a photoactive material responsive to light having a second wavelength different from the first wavelength is arranged, the at least one photoactive pattern being arranged in at least one of the plurality of transmission areas; and a cover window, which is located on the plurality of pixels and the code pattern layer; and A pen configured to: output light having the second wavelength to at least one of the plurality of transmission areas; receive redirected light from the display device; and output sensing data to the display device based on the redirected light.

18. The pen touch system according to claim 17, wherein: The plurality of pixels further include a plurality of light emitting elements, and the display device further includes an encapsulation layer on the plurality of light emitting elements, and Wherein, the cover window is located on the packaging layer, and the code pattern layer is located between the first substrate and the packaging layer.

19. The pen touch system according to claim 18, wherein: The plurality of light emitting elements emit light toward one of the first substrate and the cover window, and the display device allows the pen to perform input through a front surface and a rear surface of the display device based on sensing data received from the pen.

20. The pen touch system according to claim 18, wherein: The plurality of light emitting elements emit light toward one of the first substrate and the cover window, and the display device allows the pen to perform input through any one of a front surface and a rear surface of the display device based on sensing data received from the pen.

Images