Display device and pen touch system

Abstract

The present disclosure relates to a display device and a pen touch system, the display device including a display panel including a transmissive area and a non-transmissive area, the display panel including: a first substrate; a pixel array layer on the first substrate and including a plurality of sub-pixels and a plurality of signal lines disposed in the non-transmissive area; and a code pattern layer in which a photosensitive material responsive to light having a second wavelength is disposed. The photosensitive material may be disposed only at the plurality of code points, at points other than the plurality of code points, or disposed such that the photosensitive material disposed at the plurality of code points is thinner than the photosensitive material disposed at points other than the plurality of code points. A plurality of code points may be located in the non-transmissive region.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0099118 filed on July 28, 2023, in the Korean Intellectual Property Office, 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 an independent 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 convenient use environment, display devices have been increasingly provided with a user interface configured to allow touch input by an object such as a user's body (e.g., finger), a pen, etc. Recently, in order to allow diversified operations and more detailed input of various applications, the development of enhanced pen touch display devices has progressed. Summary of the invention

[0006] One or more aspects of the present disclosure may provide a display device and a pen touch system capable of more accurately sensing a pen touch based on an optical technology.

[0007] One or more aspects of the present disclosure may provide a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology.

[0008] One or more aspects of the present disclosure may provide a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology without deteriorating transparency.

[0009] One or more aspects of the present disclosure may provide a display device and a pen touch system including a display panel in which a light control structure capable of allowing a pen to sense a touch is integrated.

[0010] One or more aspects of the present disclosure may provide 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 for image display is integrated.

[0011] One or more aspects of the present disclosure may provide a display device and a pen touch system including a display panel in which a reflective structure and an absorption structure (or a radiation structure) are integrated as a light control structure configured to implement pen touch sensing.

[0012] One or more aspects of the present disclosure may provide a display device and a pen touch system including a display panel in which a pixel array layer serving as a reflective structure is provided, thereby implementing pen touch sensing.

[0013] According to one or more example embodiments 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 including a transmission area allowing transmission of light having a first wavelength and a non-transmission area adjacent to the transmission area, and the display panel including: a first substrate; a pixel array layer including a plurality of sub-pixels and a plurality of signal lines arranged in the non-transmission area; and a code pattern layer in which a photosensitive material responsive to light having a second wavelength different from the first wavelength is arranged, the light having the second wavelength being incident from outside the display device.

[0014] For example, the photosensitive material may be arranged in one of the following ways: arranged only at multiple code points; arranged at points other than multiple code points; and arranged so that the photosensitive material arranged at multiple code points is thinner than the photosensitive material arranged at points other than multiple code points.

[0015] Multiple code points may be located in the non-transmissive area.

[0016] Light having the second wavelength may be reflected from the pixel array layer.

[0017] According to one or more example embodiments of the present disclosure, a pen touch system may be provided, the pen touch system including a display device and a pen. The display device may include: a first substrate including a transmission area that allows transmission of light having a first wavelength and a non-transmission area different from the transmission area; a pixel array layer including a plurality of sub-pixels and a plurality of signal lines; and a code pattern layer, in which a photosensitive material that responds to light having a second wavelength different from the first wavelength is provided, and the light having the second wavelength is incident from the outside of the display device. After outputting the light having the second wavelength to the display device, the pen may receive light redirected by the display device (e.g., light having the second wavelength or light having one or more other wavelengths), and output sensing data to the display device.

[0018] Multiple code points may be located in the non-transmissive area.

[0019] For example, the photosensitive material may be arranged in one of the following ways: arranged only at multiple code points; arranged at points other than multiple code points; and arranged so that the photosensitive material arranged at multiple code points is thinner than the photosensitive material arranged at points other than multiple code points.

[0020] 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.

[0021] 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.

[0022] According to one or more aspects of the present disclosure, since a code pattern for pen touch sensing based on optical technology is provided in a non-transmissive region, a transparent display device and a pen touch system capable of sensing a pen touch based on optical technology without deteriorating transparency may be provided.

[0023] According to one or more aspects of the present disclosure, a display device and a pen touch system may be provided, which include a display panel in which a light control structure capable of allowing a pen to sense a touch is integrated.

[0024] According to one or more aspects of the present disclosure, a display device and a pen touch system may be provided, which include a display panel in which a light control structure configured not to affect light emitting performance for image display is integrated.

[0025] According to one or more aspects of the present disclosure, a display device and a pen touch system may be provided, which include a display panel in which a reflective structure and an absorption structure (or a radiation structure) are integrated as a light control structure configured to implement pen touch sensing.

[0026] According to one or more aspects of the present disclosure, a display device and a pen touch system may be provided, which include a display panel in which a pixel array layer serving as a reflective structure is provided, thereby implementing pen touch sensing.

[0027] 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 in which a light control structure configured to allow a pen to sense touch is integrated, and thus provides 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.

[0028] 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, the display panel including a pixel array layer and having a reflective structure for pen touch sensing using the pixel array layer, and thus provide the advantage of further helping to reduce the weight of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 An example pen touch system according to aspects of the present disclosure is shown;

[0031] Figure 2 An example display device according to aspects of the present disclosure is shown;

[0032] Figure 3A and Figure 3B An example pen according to aspects of the present disclosure is shown;

[0033] Figure 4 An example equivalent circuit of a sub-pixel included in a display device according to aspects of the present disclosure is shown;

[0034] Figure 5 are example plan views of display panels according to aspects of the present disclosure.

[0035] Figure 6 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0036] Figure 7 Example configurations of code patterns in a display panel according to aspects of the present disclosure are shown.

[0037] Figures 8 to 10 is an example cross-sectional view of a non-transmissive region of a display panel according to aspects of the present disclosure;

[0038] Fig.11 shows example light transmission spectra of color filters disposed in display panels according to aspects of the present disclosure;

[0039] Fig.12 and Fig.13 is an example cross-sectional view of a display panel arranged with a photosensitive pattern as a code pattern according to aspects of the present disclosure;

[0040] Fig.14 and Fig.15 is an example plan view of a display panel arranged with a plurality of photosensitive patterns as a plurality of code patterns according to aspects of the present disclosure;

[0041] Fig.16 is along Fig.14 and Fig.15 An example cross-sectional view taken along line AA′;

[0042] Fig.17 is an example cross-sectional view of a display panel provided with a photosensitive layer having a plurality of openings as a plurality of code patterns according to aspects of the present disclosure;

[0043] Fig.18 is an example plan view of a display panel provided with a photosensitive layer having a plurality of openings as a plurality of code patterns according to aspects of the present disclosure;

[0044] Fig.19 is along Fig.18 An example cross-sectional view taken along line BB′;

[0045] Fig. 20 is an example cross-sectional view of a display panel provided with a photosensitive layer having a plurality of openings as a plurality of code patterns in a non-transmission region according to aspects of the present disclosure;

[0046] Fig.21 is an example plan view of a display panel provided with a photosensitive layer having a plurality of openings as a plurality of code patterns in a non-transmission region according to aspects of the present disclosure;

[0047] Fig. 22 is along Fig.21 An example cross-sectional view taken along line CC′;

[0048] Fig.23 is an example cross-sectional view of a display panel provided with a plurality of transparent patterns as a plurality of code patterns and a photosensitive layer covering the transparent patterns according to aspects of the present disclosure;

[0049] Fig.24 is an example plan view of a display panel provided with a plurality of transparent patterns as a plurality of code patterns and a photosensitive layer covering the transparent patterns according to aspects of the present disclosure;

[0050] Fig.25 is along Fig.24 An example cross-sectional view taken along line DD′;

[0051] Fig.26 is an example plan view of a display panel provided with a plurality of photosensitive patterns as a plurality of code patterns when the display panel has a bottom emission structure according to aspects of the present disclosure;

[0052] Fig. 27 and Fig.28 is along Fig.26 An example cross-sectional view taken along line EE′;

[0053] Fig.29 is an example plan view of a display panel provided with a photosensitive layer having a plurality of openings as a plurality of code patterns when the display panel has a bottom emission structure according to aspects of the present disclosure; and

[0054] Fig.30 and Fig.31 is along Fig.29 An example cross-sectional view taken along line FF′. DETAILED DESCRIPTION

[0055] 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. Throughout the text, unless otherwise specified, similar reference numerals refer to similar 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 explained by the following example embodiments described 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. The shapes, sizes, ratios, angles, numbers, etc. of various example embodiments used to describe the present disclosure shown in the accompanying drawings are given as examples only. Therefore, the present disclosure is not limited to the illustrations in the accompanying drawings. Where the terms "comprising", "having", "including", "containing", "consisting of", "consisting of", "formed of", 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.

[0056] 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 being 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 being limited by these terms because they are not used to define a particular order or priority. In addition, the expression of a first element, a second element "and / or" a 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. As an 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.

[0057] For expressions that an element or layer is “connected,” “coupled,” or “attached” to another element or layer, unless otherwise specified, the element or layer may not only be directly connected, coupled, or attached to another element or layer, but may also be indirectly connected, coupled, or attached to another element or layer using one or more intermediate elements or layers “disposed” or “interposed” between the elements or layers. In addition, another element may be included in one or more of two or more elements that are connected, combined, coupled, or in contact with each other.

[0058] When an element or layer is “contacted” or “overlapped” with another element or layer, unless otherwise specified, 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.

[0059] In the case of describing a positional relationship, for example, in the case of using "up", "above", "below", "above", "below", "beside", "near", etc. to describe the positional relationship between two parts, unless more restrictive terms such as "immediately", "directly" or "tightly" are used, one or more other parts may be located between the two parts. For example, in the case where an element or layer is arranged "on" another element or layer, a third element or layer may be interposed therebetween. In addition, the terms "left", "right", "top", "bottom", "downward", "upward", "upward", "downward", etc. refer to an arbitrary reference system. In describing a temporal relationship, when the temporal sequence is described as, for example, "after", "subsequent", "next", or "before", unless more restrictive terms such as "just", "immediately" or "directly" are used, discontinuous situations may be included. When constructing an element, even if a clear description of an error or tolerance range is not provided, the element should be interpreted as including such an error or tolerance range. In addition, the term "may" fully encompasses all meanings of the term "can". 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 the first element, the second element, and the 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. 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 any or all combinations of the first element, the second element, and the third element. As an 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.

[0060] 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.

[0061] Figure 1 An example pen touch system 10 is shown in accordance with aspects of the present disclosure.

[0062] Reference Figure 1 In one or more example embodiments, the pen touch system 10 may identify whether a touch object has applied a touch and / or a touch position (or touch coordinates). Thereafter, the pen touch system 10 may obtain touch event information and / or obtain a touch position according to the applied touch, and thereafter, display an image (e.g., a static image or a video image) corresponding to the obtained touch event information or touch position on the screen, or perform an action corresponding to the obtained touch event information or touch position.

[0063] Reference Figure 1 In one or more example embodiments, the pen touch system 10 may include a display device 100 and a pen 110 .

[0064] 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, or may be information about a touch type such as a tap type (a tap type may also be referred to as a click type), a double-click type, a drag-and-drop type, a touch-hold type, etc.

[0065] Reference Figure 1 In 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 technique. In one or more aspects, the pen touch system 10 may use light having one or more wavelengths included in a specific wavelength band to perform pen touch sensing based on such an optical technique (hereinafter, it may be referred to as optical pen touch sensing).

[0066] 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, which is 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.

[0067] 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).

[0068] 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 will be provided based on the following examples: 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.

[0069] For example, the infrared band (e.g., about 780nm to 1000μm) can be classified into a near infrared band (e.g., 750nm to 3μm), a mid-infrared band (e.g., 3μm to 25μm), and a far infrared band (e.g., 25μm to 1000μm). 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., 780nm to 1000μm), or may include one or more of the following: a near infrared band (e.g., 750nm to 3μm), a mid-infrared band (e.g., 3μm to 25μm), and a far infrared band (e.g., 25μm to 1000μm).

[0070] 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.

[0071] As a light output function, the pen 110 may output light having a second wavelength.

[0072] According to the internal structure of the display device 100, a portion of the light having the second wavelength output from the pen 110 may be absorbed or converted into light having one or more other wavelengths inside the display device 100, and the light having the one or more other wavelengths may be radiated to move outside the display device 100. In addition, another portion of the light having the second wavelength output from the pen 110 may be reflected inside the display device 100 and redirected to move outside the display device 100.

[0073] As a light receiving function, the pen 110 may receive light (hereinafter, the light may be referred to as redirected light) which, after having been reflected or converted into light having one or more wavelengths different from the second wavelength inside the display device 100, is redirected in the form of light having the second wavelength or light having one or more other wavelengths to move outside the display device 100. 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. Herein, after the pen 110 outputs light having the second wavelength 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 outside the display device 100, the light having the second wavelength or the light having one or more other wavelengths that is redirected to move outside the display device 100 is referred to as redirected light. The redirected light may include at least one of reflected light and radiated light. The reflected light may be some of the light having the second wavelength emitted from the pen 110 that is reflected inside the display device 100 after being incident on the display device 100 and then redirected to move outside the display device 100. The radiated light may be some of the light having the second wavelength emitted from the pen 110 that is converted into light having one or more other wavelengths inside the display device 100 after being incident on the display device 100 and then radiated in the form of light having one or more other wavelengths to move outside the display device 100.

[0074] 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 has been 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.

[0075] As described above, according to 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 then 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 inside the display device 100, and then redirected to move to the outside of the display device 100 again.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] The non-display area NDA may include a pad area connected to the data driving circuit 220. For example, the pad area may be located in the non-display area NDA along a first direction. The first direction may be, for example, a column direction or a row direction.

[0082] The non-display area NDA may have a minimum size such that only a pad area or the like can 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, a 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.

[0083] 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 that emits light 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.

[0084] For example, the display device 100 according to various aspects of the present disclosure may be an organic light-emitting display device that implements the light-emitting element ED 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 that implements the light-emitting element ED 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 that implements the light-emitting element ED using quantum dots that are self-luminous semiconductor crystals.

[0085] 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.

[0086] 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.

[0087] In one or more aspects, a plurality of data lines DL and a plurality of gate lines GL may cross 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 direction or a vertical direction, and the second direction may be a row direction or a horizontal direction. In another example, the first direction may be a row direction or a horizontal direction, and the second direction may be a column direction 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.

[0088] 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.

[0089] 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.

[0090] 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 such as a bonding pad on the display panel 210 via chip on glass (COG) technology or chip on panel (COP) technology, or connected to the display panel 210 via chip on film (COF) technology.

[0091] 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 .

[0092] 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.

[0093] The gate driving circuit 230 may receive various types of gate driving control signals GCS, and further, may 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 may generate a gate signal and supply the generated gate signal to a plurality of gate lines GL.

[0094] In one or more aspects, the gate drive circuit 230 included in the display device 100 may be disposed in the non-display area NDA. In one or more aspects, the gate drive circuit 230 may be configured to overlap with the display area DA of the display panel 210. For example, the gate drive circuit 230 may be disposed in the entire display area DA, or may be disposed only in at least one partial area (e.g., one or more of the two side edges) within the display area DA. In an example where the gate drive circuit 230 is configured to overlap with the display area DA, the gate drive circuit 230 may be configured not to overlap with the sub-pixel SP, or may be configured to overlap with one or more sub-pixels or all of the sub-pixels SP.

[0095] 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.

[0096] 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 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 .

[0097] The controller 240 may 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 signals, horizontal synchronization signals, data enable signals, clock signals, etc.) received from the host system 250.

[0098] 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 .

[0099] 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 .

[0100] 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 based on the input image data to the data driving circuit 220 .

[0101] The controller 240 may be implemented in a separate component relative to 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.

[0102] 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.

[0103] 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.

[0104] The controller 240 may send signals to the data driving circuit 220 and receive signals 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), etc.

[0105] 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.

[0106] The touch sensing circuit can detect whether a touch object such as a finger, pen 110, etc. has applied a touch (eg, a finger touch or a pen touch) 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.

[0107] 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.

[0108] 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.

[0109] The display device 100 may further include a power supply circuit for supplying various types of power to the display driving circuit.

[0110] In some aspects, the display device 100 may be a mobile terminal, such as a smart phone, a tablet computer, etc., or a monitor, a television (TV), etc. 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] The plurality of pixel driving transistors may include a driving transistor DRT configured to actually drive the light emitting element ED by supplying a driving current to the light emitting element ED, and a scanning transistor SCT configured to enable the data signal VDATA to be transmitted to a second node N2 which is a gate node of the driving transistor DRT.

[0115] The at least one capacitor may include a storage capacitor Cst configured to maintain a constant voltage during a display frame or a specific period of the display frame.

[0116] 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.

[0117] 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 sub-pixels in 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 an emission layer EML.

[0118] 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: an emission layer EML, a first common layer CL1 between the pixel electrode PE and the emission layer EML, and a second common layer CL2 between the emission layer EML and the common electrode CE. The emission layer EML may be disposed in each sub-pixel SP, and the first common layer CL1 and the second common layer CL2 may be commonly disposed in all or some of the sub-pixels in the plurality of sub-pixels SP. The emission 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 sub-pixels in the plurality of sub-pixels SP, and further extend to the non-light emitting region. Each light emitting element ED may be configured by the portions where the corresponding pixel electrode PE, the corresponding emission layer EML, the first common layer CL1 and the second common layer CL2, and the corresponding portions of the common electrode CE overlap with each other. A 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 the region where the corresponding pixel electrode PE, the corresponding element intermediate layer EL, and the common electrode CE overlap with each other.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] The scanning transistor SCT may be a switching transistor for enabling 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.

[0125] 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 control the electrical connection between the second node N2 of the driving transistor DRT and the data line DL. The drain electrode or source electrode of the scanning transistor SCT may be electrically connected to the data line DL. The source electrode or drain electrode of the scanning transistor SCT may be electrically connected to the second node N2 of the driving transistor DRT. The gate electrode of the scanning transistor SCT may be electrically connected to the scanning line SCL.

[0126] 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 the first node N1 of the driving transistor DRT or corresponding to the first node N1 of the driving transistor DRT; and a second capacitor electrode electrically connected to the second node N2 of the driving transistor DRT or corresponding to the second node N2 of the driving transistor DRT.

[0127] Each of the driving transistor DRT and the scanning transistor SCT may be an n-type transistor or a p-type transistor.

[0128] 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.

[0129] like Figure 2 As shown, the sub-pixel circuit SPC may include two transistors (2T: SCT and DRT) and one capacitor (1C: Cst) (this 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.

[0130] The type and number of gate signals supplied to the sub-pixel SP and / or the type and number of gate lines connected to the sub-pixel 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-pixel SP may vary according to the structure of the corresponding sub-pixel circuit SPC.

[0131] Since the circuit element (e.g., the light emitting element ED such as an organic light emitting diode (OLED) including an organic material) in each sub-pixel SP is susceptible to 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., the 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.

[0132] Reference Figure 2 In one or more aspects, the display device 100 may include a communication module 260 for communicating with the pen 110 .

[0133] 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.

[0134] 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 to the controller 240 or the data driving circuit 220 for displaying an image to be presented according to the selection of the object on the display panel 210. 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.

[0135] Reference Figure 3A and Figure 3B In 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 .

[0136] The pen tip 360 may be an element for contacting the display device 100 .

[0137] 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.

[0138] The light receiving sensor 320 may receive and sense the redirected light from the display panel 210. The redirected light from the display panel 210 may be light that has been reflected inside the display panel 210, among the light having the second wavelength emitted from the light emitting device 310. For example, the light receiving sensor 320 may be implemented using 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 210, and generate an infrared image.

[0139] 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 has been 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.

[0140] 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.

[0141] The communication device 350 of the pen 110 and the communication module 260 of the display device 100 may communicate according to a predefined communication protocol.

[0142] 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.

[0143] 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 .

[0144] 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.

[0145] 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.

[0146] 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 in FIG. Figure 4 The sub-pixel circuit SPC of the sub-pixel SP shown in FIG. 1 may further include a sensing transistor SENT. Figure 2 The different characteristics of the sub-pixels SP provide Figure 4 Therefore, for the convenience of discussion, the discussion of the sub-pixel SP is omitted. Figure 2 The same characteristics of the sub-pixel SP are discussed.

[0147] 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.

[0148] 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.

[0149] The sensing transistor SENT may be a transistor for controlling a voltage state of the first node N1 of the driving transistor DRT and connected between the first node N1 of the driving transistor DRT and a reference voltage line RVL.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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 Examples of structures (i.e., equivalent circuits) are provided for discussion.

[0155] Figure 5 is an example plan view of a display panel 210 according to aspects of the present disclosure.

[0156] 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 back (bottom) surface of the display panel 210.

[0157] Reference Figure 5 In 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 a front (top) surface and a rear (bottom) surface of the display panel 210 .

[0158] The plurality of transmission areas TA may be areas that allow transmission of light having one or more wavelengths (e.g., the first wavelength discussed above) included in the visible light band. By applying this configuration, the rear surface or portion located at the back of the display device 100 can be seen from the front of the display device 100. The plurality of transmission areas TA may allow transmission of not only light having one or more wavelengths in the visible light band, but also light having one or more wavelengths (e.g., the second wavelength discussed above) included in the second band (e.g., the infrared band). The plurality of transmission areas TA may also be referred to as transparent areas.

[0159] like Figure 5As shown, for example, the display panel 210 may include a plurality of pixel array areas PA and a plurality of transmission areas TA. The plurality of pixel array areas PA may also be referred to as non-transmission areas, and may be areas that do not allow light to be transmitted at all or allow light to be transmitted at a lower transmittance than the transmission area TA. The display area DA of the display panel 210 may include a plurality of pixel array areas PA as non-transmission areas and a plurality of transmission areas TA.

[0160] For example, Figure 5 As shown, each of the plurality of pixel array regions PA may be a region where a plurality of sub-pixels SP are disposed, and may be disposed along the first direction. The plurality of pixel array regions PA may be spaced apart from each other along the second direction. The transmission region TA may exist between two adjacent pixel array regions PA among the plurality of pixel array regions PA.

[0161] Reference Figure 5 Each of the plurality of pixel array areas PA may include a plurality of light emitting areas EA. The plurality of light emitting areas EA may be areas that emit light from a plurality of light emitting elements ED included in a plurality of sub-pixels SP.

[0162] For example, refer to Figure 5 , a plurality of pixels P may be disposed in each of the plurality of pixel array areas PA. 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.

[0163] For example, the first subpixel SP1 may emit light of a first color, the second subpixel SP2 may emit light of a second color, the third subpixel SP3 may emit light of a third color, and the fourth subpixel SP1 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.

[0164] Reference Figure 5 , a ratio between a total area of ​​the plurality of pixel array regions PA and a total area of ​​the plurality of transmission regions TA may be determined to various values ​​according to desired transparency of the display panel 210.

[0165] As described above, in the pen touch system 10 according to one or more example embodiments of the present disclosure, in order for the pen 110 to detect a touch, when light having a second wavelength emitted from the pen 110 is incident on the display panel 210 of the display device 100, a portion of the light having the second wavelength may be absorbed or converted into light having one or more other wavelengths inside the display panel 210, and then radiated in the form of light having one or more other wavelengths to move to the outside of the display device 100. In addition, another portion of the light having the second wavelength may be reflected inside the display panel 210, and then redirected to move to the outside of the display device 100.

[0166] Therefore, in one case, a portion of the light having the second wavelength may be reflected at a point of the display panel 210, so that the resulting redirected light (reflected light) moves to the outside of the display device 100, and another portion of the light having the second wavelength may be absorbed at another point of the display panel 210, without generating such induced redirected light (reflected light).

[0167] In another case, a portion of the light having the second wavelength may be reflected at a point of the display panel 210, so that the resulting redirected light (reflected light) moves outside the display device 100, and another portion of the light having the second wavelength may be converted into light having one or more other wavelengths at another point of the display panel 210 and radiated in the form of light having one or more other wavelengths, so that the resulting redirected light (radiated light) moves outside the display device 100.

[0168] 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 coming out of the display panel 210 or the display device 100. For example, the pen 110 may detect the touch position of the pen 110 by sensing the chromaticity difference of the reflected light coming out of the display panel 210. In another example, the pen 110 may detect the touch position of the pen 110 by sensing the wavelength difference of the redirected light (reflected light and radiated light) coming out of the display panel 210 or the display device 100.

[0169] In one or more aspects, the display panel 210 of the display device 100 may include a light control structure configured to cause a portion of light having a second wavelength incident to the interior of the display panel 210 after being output from the pen 110 to be absorbed or radiated, and another portion of the light to be reflected, so that the resulting redirected light (i.e., radiated light and reflected light) exits the display device 100.

[0170] In one or more aspects, the light control structure included in the display panel 210 of the display device 100 may include a reflective structure configured to reflect light having the second wavelength and an absorption structure configured to absorb light having the second wavelength.

[0171] 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 .

[0172] The absorption structure may absorb light having a second wavelength included in the second wavelength band (eg, infrared light). The absorption structure absorbing the light having the second wavelength may cause a chromaticity difference in distribution of the redirected light (eg, infrared light) received by the pen 110 .

[0173] 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).

[0174] In one or more aspects, the display device 100 may include a radiation structure instead of or in addition to the absorption structure. The radiation structure may include a structure configured to convert light having a second wavelength into light having one or more wavelengths different from the second wavelength, and thereafter radiate light having one or more different wavelengths. The radiation structure may cause a wavelength difference of the redirected light (e.g., infrared light) received by the pen 110 to occur.

[0175] 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.

[0176] 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.

[0177] Figure 6 is a cross-sectional view of a display panel 210 according to aspects of the present disclosure.

[0178] Reference Figure 6In one or more aspects, the display panel 210 may include at least one transmission area TA and at least one non-transmission area NTA. Herein, the non-transmission area NTA may correspond to Figure 5 Pixel array area PA.

[0179] Reference Figure 6 In one or more aspects, the display panel 210 may include a first substrate 211 , a pixel array layer 610 , an insulating layer 620 , an encapsulation layer 630 , an adhesive layer 640 , and a cover window 650 .

[0180] The pixel array layer 610 may be located on the first substrate 211 and may include a plurality of sub-pixels SP and a plurality of signal lines disposed in the non-transmission area NTA. According to this configuration, a plurality of transistors (DRT, SCT, SENT), a plurality of storage capacitors Cst, and a plurality of light-emitting elements ED may be disposed in the pixel array layer 610, and a plurality of data lines DL, a plurality of gate lines GL, a plurality of first driving voltage lines DVL, a plurality of second driving voltage lines BVL, and a plurality of reference voltage lines RVL may be disposed in the pixel array layer 610.

[0181] Reference Figure 6 The insulating layer 620 may be located on the pixel array layer 610, and may be provided in both the transmission area TA and the non-transmission area NTA.

[0182] The insulating layer 620 may also be referred to as a filling layer including a filling material. The insulating layer 620 may have a planarization function.

[0183] Reference Figure 6 In one or more aspects, the display panel 210 may further include a color filter layer CFL located above 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.

[0184] Reference Figure 6 , the pixel array layer 610 and the color filter layer CFL may not be disposed in the transmission area TA but may be disposed in the non-transmission area NTA.

[0185] Reference Figure 6 The color filter layer CFL may be located between the pixel array layer 610 and the code pattern layer L2, and may include a plurality of color filters CF disposed in the non-transmission area NTA.

[0186] The light emitted from the light emitting element ED may have one or more wavelengths (eg, a first wavelength) different from the second wavelength.

[0187] The light passing through the color filter CF after being emitted from the light emitting element ED may have one or more wavelengths (eg, the first wavelength) different from the second wavelength.

[0188] The plurality of color filters CF may include a first color filter CF1 allowing transmission of a first color light, a second color filter CF2 allowing transmission of a second color light, and a third color filter CF3 allowing transmission of a third color light.

[0189] 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.

[0190] 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 color lights and therefore has all wavelength characteristics. 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.

[0191] Reference Figure 6 In one or more aspects, the display panel 210 may include a light control structure for pen touch sensing, and the light control structure may include a reflective layer L1 corresponding to the reflective structure and a code pattern layer L2 corresponding to the absorption structure or the radiation structure. In one or more aspects, the code pattern layer L2 may be a layer formed with a code pattern for pen touch sensing or a layer for forming a code pattern, and may be referred to as a code pattern configuration layer.

[0192] Reference Figure 6 The light control structure may further include an intermediate layer Li between the reflective layer L1 and the code pattern layer L2. As an example, the intermediate layer Li may include an insulating layer 620 and an encapsulation layer 630.

[0193] Reference Figure 6In one or more aspects, the reflective layer L1 included in the display panel 210 may not be a dedicated reflective layer used only to provide a light control structure. For example, the pixel array layer 610 may be used as the reflective layer L1.

[0194] Therefore, since the reflective layer L1 serving as a light control structure for pen touch sensing does not need to be separately formed in the display panel 210 , the thickness of the display panel 210 may be reduced, and the manufacturing process of the display panel 210 may be simplified.

[0195] Reference Figure 6 , since the reflective layer L1 is located below the color filter layer CFL, the plurality of color filters CF disposed in the color filter layer CFL may include a material that allows transmission of light having the second wavelength. According to this implementation, the light having the second wavelength may be normally reflected in the reflective layer L1, which enables normal performance of pen touch sensing.

[0196] Reference Figure 6 , the code pattern layer L2 may be a layer including a photosensitive material responsive to light having a second wavelength.

[0197] For example, the code pattern layer L2 may be located on the encapsulation layer 630. In another example, the code pattern layer L2 may be disposed between the pixel array layer 610 and the encapsulation layer 630.

[0198] In the code pattern layer L2, the photosensitive material responsive to the light having the second wavelength may not be disposed in the entire region of the code pattern layer L2. For example, the photosensitive material included in the code pattern layer L2 may be disposed only at a plurality of code points, disposed at points other than the plurality of code points, or disposed such that the photosensitive material disposed at the plurality of code points is thinner than the photosensitive material disposed at points other than the plurality of code points. The plurality of code points may be located in the non-transmission area NTA.

[0199] Therefore, in the code pattern layer L2, the transmittance or absorptance of light having the second wavelength incident from the outside of the display device 100 may be different for each position in the non-transmission area NTA.

[0200] At points where photosensitive materials exist in the code pattern layer L2, light having the second wavelength incident on the display panel 210 may be absorbed by the photosensitive material, or converted into light having one or more other wavelengths and then radiated in the form of light having one or more other wavelengths.

[0201] At a point where no photosensitive material exists in the code pattern layer L2 , light having the second wavelength incident on the display panel 210 may enter the code pattern layer L2 without being responded to by the photosensitive material of the code pattern layer L2 , and then be reflected in the pixel array layer 610 .

[0202] Such redirected light (ie, radiated light or reflected light) may be moved to the outside of the display panel 210. The redirected light coming out of the display panel 210 may be received by the pen 110.

[0203] Reference Figure 6 In one or more aspects, the display panel 210 may have a top emission structure in which a cover window 650 located on an opposite side of the first substrate 211 serves as a viewing surface.

[0204] In an example where the display panel 210 has a top emission structure, the code pattern layer L2 may be located on the pixel array layer 610 , and at least a portion of the sub-pixel circuit SPC may overlap with the light emitting element ED.

[0205] 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 PE) close to the first substrate 211 may be a reflective electrode, and the second electrode (common electrode CE) farther away from the first substrate 211 than the first electrode (pixel electrode PE) may be a transparent electrode.

[0206] In an example in which the display panel 210 has a top emission structure, it is desirable that visible light emitted from the light emitting element ED is not absorbed by the photosensitive material disposed in the code pattern layer L2.

[0207] Therefore, the photosensitive material disposed in the code pattern layer L2 may have a property of transmitting visible light emitted from the light emitting element ED.

[0208] According to this configuration, even when the photosensitive material overlaps with one or more light emitting elements ED or one or more color filters CF, light (e.g., visible light) emitted from one or more light emitting elements ED or light (e.g., visible light) passing through one or more color filters CF after being emitted from one or more light emitting elements ED can pass through the photosensitive material and normally come out of the display panel 210. Therefore, the display panel 210 can normally display an image.

[0209] Figure 7 An example configuration of a code pattern in the display panel 210 according to aspects of the present disclosure is shown.

[0210] Reference Figure 6 and Figure 7The code pattern layer L2 may include: a plurality of data cell regions D-CELL 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-CELL along 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-CELL along the first direction.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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 m rows and n columns in each of the plurality of data cell regions D-CELL, but for each of the plurality of data cell regions D-CELL, one or more of the positions in which the plurality of data code patterns CP_CELL are respectively set may be slightly different.

[0217] 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).

[0218] 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.

[0219] Reference Figure 7 For example, 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 corresponding unique patterns to represent unique coordinate pairs using a code.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] The pen 110 may recognize a plurality of code patterns CP based on the redirected light, recognize a plurality of first and second cell guide lines CGL1 and CGL2 based on a result of the recognition, and recognize a plurality of data cell regions D-CELL divided by the plurality of first and second cell guide lines CGL1 and CGL2.

[0225] 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.

[0226] 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 precise 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.

[0227] Hereinafter, a method of forming the code pattern CP in the display panel 210 will be described in more detail.

[0228] Figures 8 to 10 is an example cross-sectional view of a non-transmission region of a display panel 210 according to aspects of the present disclosure.

[0229] Reference Figures 8 to 10 In one or more example embodiments, the display panel 210 may include a reflective layer L1 as a reflective structure and a code pattern layer L2 as an absorption structure or a radiation structure as a light control structure for pen touch sensing.

[0230] The reflective layer L1 may be located on the first substrate 211 .

[0231] The code pattern layer L2 may be located above the reflective layer L1.

[0232] The code pattern layer L2 may be positioned closer to the viewing surface and the pen 110 than the reflective layer L1.

[0233] The intermediate layer Li may be located between the reflective layer L1 and the code pattern layer L2.

[0234] Reference Figure 8 , the code pattern layer L2 may include a photosensitive material, and include a plurality of photosensitive patterns LRP spaced apart from each other.

[0235] The plurality of photosensitive patterns LRP may be located in the non-transmission area NTA and correspond to the plurality of code patterns CP.

[0236] The plurality of photosensitive patterns LRP may be disposed at a plurality of code points in the non-transmission area NTA and respectively correspond to the plurality of code patterns CP. The points where the plurality of photosensitive patterns LRP are located may correspond to the plurality of code points where the plurality of code patterns CP are located.

[0237] The plurality of photosensitive patterns LRP may absorb light having a second wavelength (e.g., infrared light, etc.), or radiate light having one or more wavelengths different from the second wavelength in response to light having the second wavelength. For example, the plurality of photosensitive patterns LRP may include an absorption material that absorbs light having a second wavelength (e.g., infrared light), or include a radiation material (e.g., phosphor) that radiates light having one or more wavelengths different from the second wavelength in response to light having the second wavelength.

[0238] A portion of the light having the second wavelength emitted from the pen 110 and incident on the display panel 210 may be absorbed by the plurality of photosensitive patterns LRP located at the plurality of code points, or converted into light having one or more other wavelengths and then radiated in the form of light having one or more other wavelengths.

[0239] Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the space between the plurality of photosensitive patterns LRP.

[0240] Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the space between the plurality of photosensitive patterns LRP, be reflected by the reflective layer L1 , and then be redirected to move outside the display panel 210 .

[0241] Accordingly, the redirected light reflected by the reflective layer L1 of the display panel 210 and subsequently caused to move to the outside of the display panel 210 may have existed at points other than the multiple code points (or have passed through these points), and may not exist at the multiple code points (or have not passed through the multiple code points) or may have existed (or have passed through) in the form of light having one or more other wavelengths.

[0242] Therefore, there may be a chromaticity difference or a wavelength difference of the redirected light received by the pen 110. The pen 110 may detect the chromaticity difference or the wavelength difference of the redirected light, recognize the positions of the plurality of photosensitive patterns LRP as the positions of the plurality of code patterns CP, and determine the position of the pen 110 (i.e., the touch position) based on the recognized positions of the plurality of code patterns CP.

[0243] Reference Fig. 9 , the code pattern layer L2 may include a photosensitive layer LRL including a photosensitive material.

[0244] The photosensitive layer LRL may have a plurality of openings OP spaced apart from each other.

[0245] The plurality of openings OP formed in the photosensitive layer LRL may be disposed at a plurality of code points in the non-transmission area NTA and correspond to a plurality of code patterns CP, respectively.

[0246] The plurality of points where the plurality of openings OP formed in the photosensitive layer LRL are located may correspond to the plurality of code points where the plurality of code patterns CP are located.

[0247] The photosensitive layer LRL may absorb light having the second wavelength, or radiate light having one or more wavelengths different from the second wavelength in response to light having the second wavelength. For example, the photosensitive layer LRL may include a photosensitive material (e.g., a dye, a pigment) that absorbs light having the second wavelength (e.g., infrared light, etc.), or a photosensitive material (e.g., a phosphor) that radiates light having one or more wavelengths different from the second wavelength in response to light having the second wavelength.

[0248] A portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may be absorbed by the photosensitive layer LRL, or may be converted into light having one or more wavelengths different from the second wavelength and then radiated in the form of light having one or more other wavelengths.

[0249] Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the plurality of openings OP formed in the photosensitive layer LRL.

[0250] Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the plurality of openings OP formed in the photosensitive layer LRL, be reflected by the reflective layer L1 , and then be redirected to move outside the display panel 210 .

[0251] Accordingly, the redirected light emitted to the outside of the display panel 210 may already exist at multiple code points and not exist at points other than the multiple code points or already exist at points other than the multiple code points in the form of light having one or more wavelengths different from the second wavelength.

[0252] Therefore, there may be a chromaticity difference or a wavelength difference of the redirected light received by the pen 110. The pen 110 may detect the chromaticity difference or the wavelength difference of the redirected light, identify the positions of the plurality of openings OP formed in the photosensitive layer LRL as the positions of the plurality of code patterns CP, and determine the position of the pen 110 (i.e., the touch position) based on the identified positions of the plurality of code patterns CP.

[0253] Reference Fig.10 , the code pattern layer L2 may include a plurality of transparent patterns TP spaced apart from each other and a photosensitive layer LRL covering the plurality of transparent patterns TP.

[0254] The plurality of transparent patterns TP may be disposed at a plurality of code points in the non-transmission area NTA and correspond to the plurality of code patterns CP, respectively.

[0255] The plurality of transparent patterns TP may include a material that allows transmission of light having the second wavelength. For example, the plurality of transparent patterns TP may be a transparent resin.

[0256] The plurality of points where the plurality of transparent patterns TP are located may correspond to the plurality of code points where the plurality of code patterns CP are located.

[0257] The photosensitive layer LRL may include a photosensitive material.

[0258] The photosensitive layer LRL may absorb light having the second wavelength, or radiate light having one or more wavelengths different from the second wavelength in response to the light having the second wavelength. For example, the photosensitive layer LRL may include a photosensitive material that absorbs light having the second wavelength (e.g., infrared light, etc.), or include a photosensitive material (e.g., phosphor) that radiates light having one or more wavelengths different from the second wavelength in response to the light having the second wavelength.

[0259] In contrast, the plurality of transparent patterns TP may allow transmission of light having the second wavelength.

[0260] A portion of the photosensitive layer LRL overlapping the plurality of transparent patterns TP may be thinner than a portion not overlapping the plurality of transparent patterns TP.

[0261] Therefore, a portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may be absorbed by the photosensitive layer LRL, or may be converted into light having one or more wavelengths different from the second wavelength and then radiated in the form of light having one or more different wavelengths. Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the plurality of transparent patterns TP covered by a portion of the photosensitive layer LRL having a thin thickness, be reflected by the reflective layer L1, and then be redirected to move outside the display panel 210.

[0262] Accordingly, the redirected light emitted to the outside of the display panel 210 may already exist at multiple code points and not exist at points other than the multiple code points or already exist at points other than the multiple code points in the form of light having one or more wavelengths different from the second wavelength.

[0263] Therefore, there may be a chromaticity difference or a wavelength difference of the redirected light received by the pen 110. The pen 110 may detect the chromaticity difference or the wavelength difference of the redirected light, recognize the positions of the plurality of transparent patterns TP as the positions of the plurality of code patterns CP, and determine the position of the pen 110 (i.e., the touch position) based on the recognized positions of the plurality of code patterns CP.

[0264] Fig.11Example light transmission spectra of color filters ( CF1 , CF2 , and CF3 ) disposed in the display panel 210 according to aspects of the present disclosure are shown.

[0265] Reference Fig.11 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.

[0266] Fig.11 The transmission spectrum of FIG. 1 shows the corresponding light 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 380 nm to 780 nm and the infrared band WB_IL of about 780 nm to 1080 nm.

[0267] Reference Fig.11 , 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.

[0268] Reference Fig.11 , 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.

[0269] The second color filter CF2 may have high transmittance for infrared light of a first specific wavelength λa in an infrared band WB_IL having a wavelength greater than or equal to about 780 nm to 1080 nm, and may have low transmittance for infrared light in a wavelength band from 780 nm to the first specific wavelength λa.

[0270] The third color filter CF3 may have a high transmittance for infrared light of a second specific wavelength λb in an infrared band WB_IL having a wavelength greater than or equal to about 780nm to 1080nm, and may have a low transmittance for infrared light in a wavelength band from 780nm to the second specific wavelength λb. Here, the second specific wavelength λb may be shorter than the first specific wavelength λa.

[0271] As mentioned above Figure 6 As described above, the first to third color filters ( CF1 , CF2 , and CF3 ) may be disposed between the pixel array layer 610 serving as the reflective layer L1 and the code pattern layer L2 including a photosensitive material.

[0272] Therefore, for pen touch sensing, the first to third color filters ( CF1 , CF2 , and CF3 ) may exist in a path through which light having the second wavelength passes.

[0273] Accordingly, when the light having the second wavelength is infrared light, the first to third color filters ( CF1 , CF2 , and CF3 ) need to completely transmit the light having the second wavelength.

[0274] Therefore, if Fig.11 As shown, the second wavelength may be set to be equal to or greater than a first specific wavelength λa at which all of the first to third color filters (CF1, CF2, and CF3) have high transmittance. For example, the second wavelength may be 940 nm or greater.

[0275] In the following, reference is made to Figures 12 to 25 The display panel 210 configured with a top emission structure and having a light control structure for pen touch sensing is described in more detail.

[0276] Fig.12 and Fig.13 is an example cross-sectional view of a display panel 210 arranged with a photosensitive pattern as a code pattern according to aspects of the present disclosure. It should be noted that Fig.12 and Fig.13 The light having the second wavelength is infrared light.

[0277] Fig.12 and Fig.13 yes Figure 6 A cross-sectional view of an exemplary implementation of the code pattern layer L2 in a cross-sectional view of FIG. Figure 6 The different features of the cross-sectional diagram are provided for discussion.

[0278] Reference Fig.12 and Fig.13 In one or more aspects, the display panel 210 may include at least one transmission area TA and at least one non-transmission area NTA. The non-transmission area NTA may correspond to Figure 5 Pixel array area PA.

[0279] Reference Fig.12 and Fig.13 In one or more aspects, the display panel 210 may include a first substrate 211 , a pixel array layer 610 , an insulating layer 620 , an encapsulation layer 630 , an adhesive layer 640 , and a cover window 650 .

[0280] Reference Fig.12 and Fig.13 , the pixel array layer 610 may be located on the first substrate 211 and disposed in the non-transmission area NTA.

[0281] The pixel array layer 610 may include a plurality of metal layers and a plurality of various insulating layers for forming various transistors (eg, DRT, SCT, SENT), various capacitors (eg, Cst), and various signal lines (eg, DL, SCL, SENL, DVL, BVL, etc.).

[0282] As such, since many metals for various purposes are provided in the pixel array layer 610 , the pixel array layer 610 may function as the reflective layer L1 to reflect the light having the second wavelength.

[0283] Reference Fig.12 and Fig.13 In one or more aspects, the display panel 210 may further include a color filter layer CFL located above 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.

[0284] Reference Fig.12 and Fig.13 , the pixel array layer 610 and the color filter layer CFL may not be disposed in the transmission area TA but may be disposed in the non-transmission area NTA.

[0285] Reference Fig.12 and Fig.13 The color filter layer CFL may be located between the pixel array layer 610 and the code pattern layer L2, and may include a plurality of color filters CF disposed in the non-transmission area NTA. The plurality of color filters CF may include a first color filter CF1 allowing transmission of a first color light, a second color filter CF2 allowing transmission of a second color light, and a third color filter CF3 allowing transmission of a third color light.

[0286] The light emitted from the light emitting element ED may have one or more wavelengths different from the second wavelength.The light passing through the color filter CF after being emitted from the light emitting element ED may have one or more wavelengths different from the second wavelength.

[0287] The plurality of color filters CF may transmit light having a second wavelength (eg, infrared light).

[0288] 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.

[0289] Reference Fig.12 and Fig.13In one or more aspects, the display panel 210 may include a light control structure for pen touch sensing, and the light control structure may include a reflective layer L1 corresponding to the reflective structure and a code pattern layer L2 corresponding to the absorption structure or the radiation structure. The light control structure may also include an intermediate layer Li located between the reflective layer L1 and the code pattern layer L2. As an example, the intermediate layer Li may include an insulating layer 620 and an encapsulation layer 630.

[0290] Reference Fig.12 and Fig.13 Since the reflective layer L1 is located under the color filter layer CFL, the plurality of color filters CF disposed on the color filter layer CFL may include a material that allows transmission of light having the second wavelength.

[0291] Reference Fig.12 and 13 The code pattern layer L2 may be a layer including a photosensitive material that responds to light having a second wavelength. For example, the code pattern layer L2 may be located on the encapsulation layer 630. In another example, the code pattern layer L2 may be disposed between the pixel array layer 610 and the encapsulation layer 630.

[0292] Reference Fig.12 and Fig.13 , a plurality of photosensitive patterns LRP may be configured to be spaced apart from each other in the code pattern layer L2.

[0293] The plurality of photosensitive patterns LRP may be configured to be spaced apart from each other in the non-transmission area NTA. The plurality of photosensitive patterns LRP may be disposed at a plurality of code points in the non-transmission area NTA and respectively correspond to a plurality of code patterns CP.

[0294] The plurality of photosensitive patterns LRP may include a photosensitive material responsive to light having a second wavelength. For example, the plurality of photosensitive patterns LRP may include a light absorbing material that absorbs light having a second wavelength. In another example, the plurality of photosensitive patterns LRP may include a wavelength conversion material (e.g., a phosphor) that is capable of converting the second wavelength into one or more other wavelengths in response to light having a second wavelength and radiating light having one or more other wavelengths.

[0295] like Fig.12 and Fig.13 As shown, at least one of the plurality of light sensitive patterns LRP may overlap at least a corresponding portion of at least one of the light emitting areas (EA1, EA2, EA3, and EA4). Fig.12 and Fig.13 In an example, the light sensitive pattern LRP may overlap with the light emitting area EA4 configured to emit white light. Fig.16As shown, the light sensitive pattern LRP may not overlap with the light emitting areas (EA1 and EA2).

[0296] The photosensitive material included in the plurality of photosensitive patterns LRP may have a characteristic of transmitting visible light emitted from the light emitting elements ED. According to this configuration, even when the photosensitive material overlaps one or more light emitting elements ED or one or more color filters CF, light (e.g., visible light) emitted from one or more light emitting elements ED or light (e.g., visible light) passing through one or more color filters CF after being emitted from one or more light emitting elements ED may pass through the photosensitive material and normally exit from the display panel 210. Therefore, the display panel 210 may normally display an image.

[0297] Reference Fig.12 and Fig.13 , a portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may be absorbed by the plurality of photosensitive patterns LRP located at the plurality of code points, or converted into light having one or more other wavelengths and then radiated in the form of light having one or more other wavelengths.

[0298] Another portion of the light having the second wavelength incident on the display panel 210 after being emitted from the pen 110 may pass through the space between the plurality of photosensitive patterns LRP, be reflected by the reflective layer L1 , and then be redirected to move outside the display panel 210 .

[0299] Accordingly, the redirected light reflected by the reflective layer L1 of the display panel 210 and subsequently caused to move to the outside of the display panel 210 may have existed at points other than the multiple code points (or have passed through these points), and may not exist at the multiple code points (or have not passed through the multiple code points) or may have existed (or have passed through) in the form of light having one or more other wavelengths.

[0300] Therefore, there may be a chromaticity difference or a wavelength difference of the redirected light received by the pen 110. The pen 110 may detect the chromaticity difference or the wavelength difference of the redirected light, recognize the positions of the plurality of photosensitive patterns LRP as the positions of the plurality of code patterns CP, and determine the position of the pen 110 (i.e., the touch position) based on the recognized positions of the plurality of code patterns CP.

[0301] Reference Fig.13 In one or more aspects, the display panel 210 may further include a planarization layer 1300 disposed on the plurality of photosensitive patterns LRP. The planarization layer 1300 may reduce steps caused by the plurality of photosensitive patterns LRP.

[0302] Fig.14 and Fig.15is an example plan view of a display panel 210 in which a plurality of light sensitive patterns LRP are arranged as a plurality of code patterns CP according to aspects of the present disclosure.

[0303] Reference Fig.14 and Fig.15 , the display panel 210 may include a plurality of pixel array areas PA and a plurality of transmission areas TA. A plurality of pixels P may be provided in each of the pixel array areas PA, and each of the plurality of pixels P may include a plurality of sub-pixels (SP1, SP2, SP3, and SP4). Each of the plurality of pixel array areas PA may include a plurality of emission areas EA.

[0304] Reference Fig.14 and Fig.15 , each of the plurality of pixel array areas PA may be a long area extending along the first direction, and each of the plurality of transmission areas TA may be a long area extending along the first direction. The transmission area TA may exist between two adjacent pixel array areas PA along the second direction among the plurality of pixel array areas PA.

[0305] Reference Fig.14 and Fig.15 , a plurality of code points in the non-transmission area NTA may correspond to a plurality of code patterns CP. For example, a plurality of photosensitive patterns LRP disposed at a plurality of code points in the non-transmission area NTA may correspond to a plurality of code patterns CP.

[0306] Reference Fig.14 and Fig.15 For example, one or more of the plurality of code patterns CP may overlap with one or more light emitting regions in the non-transmission area NTA. In another example, one or more of the plurality of code patterns CP may overlap with a non-light emitting region in the non-transmission area NTA.

[0307] Reference Fig.14 , for example, a corresponding photosensitive pattern LRP may be provided in each region where one pixel P is provided.

[0308] In another example, a corresponding light sensitive pattern LRP may be provided in each region where two or more pixels P are provided. Fig.15 As shown, a plurality of photosensitive patterns LRP may be provided in an odd pixel array region PA among a plurality of pixel array regions PA, and a plurality of photosensitive patterns LRP may not be provided in an even pixel array region PA among a plurality of pixel array regions PA. The photosensitive pattern LRP may be provided only in an odd pixel P among a plurality of pixels P provided in an odd pixel array region PA.

[0309] Reference Fig.14 , Fig.15 and Figure 7 , Fig.14 and Fig.15 At least some of the photosensitive patterns LRP shown in the diagram 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.

[0310] also, Fig.14 and Fig.15 Some of the photosensitive 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 ) around the data cell region D-CELL.

[0311] Fig.16 is along Fig.14 and Fig.15 An example cross-sectional view taken along line AA′.

[0312] Reference Fig.16 , the first sub-pixel SP1 and the second sub-pixel SP2 may be disposed in the pixel array area PA as the non-transmission area NTA, and the transmission areas TA may be disposed on both sides of the pixel array area PA as the non-transmission area NTA.

[0313] Reference Fig.16 For example, the first sub-pixel SP1 and the second sub-pixel SP2 may have Figure 4 Therefore, the first sub-pixel SP1 may include a first light emitting element ED1, a first driving transistor DRT1, a first sensing transistor SENT1, and a first storage capacitor Cst1, and includes a first scanning transistor SCT. Fig.16 The second sub-pixel SP2 may include a second light emitting element ED2, a second driving transistor DRT2, a second sensing transistor SENT2, and a second storage capacitor Cst2, and includes a second scanning transistor SCT. Fig.16 Not shown.

[0314] Reference Fig.16 , a first light shielding portion LS1 and a second light shielding portion LS2 may be provided on the first substrate 211. The first light shielding portion LS1 may be provided under the first driving transistor DRT1 and prevent the channel of the first driving transistor DRT1 from being exposed to light. The second light shielding portion LS2 may be provided under the second driving transistor DRT2 and prevent the channel of the second driving transistor DRT2 from being exposed to light.

[0315] Reference Fig.16 , a portion of the first light shielding portion LS1 may be used as a first capacitor electrode PLT1a of the first storage capacitor Cst1, and a portion of the second light shielding portion LS2 may be used as a first capacitor electrode PLT2a of the second storage capacitor Cst2.

[0316] Reference Fig.16 A buffer layer 1602 may be disposed on the first light shielding portion LS1 and the second light shielding portion LS2. An active layer ACT1 of the first driving transistor DRT1, an active layer ACTa of the first sensing transistor SENT1, an active layer ACT2 of the second driving transistor DRT2, and an active layer ACTb of the second sensing transistor SENT2 may be disposed on the buffer layer 1602.

[0317] In addition, the second capacitor electrode PLT1 b of the first storage capacitor Cst1 and the second capacitor electrode PLT2 b of the second storage capacitor Cst2 may also be disposed on the buffer layer 1602 .

[0318] The second capacitor electrode PLT1b of the first storage capacitor Cst1 and the second capacitor electrode PLT2b of the second storage capacitor Cst2 may include the same semiconductor material as the active layer (ACT1, ACTa, ACT2, and ACTb). For example, the semiconductor material may be an oxide semiconductor material or a silicon-based semiconductor material. For example, the second capacitor electrode PLT1b of the first storage capacitor Cst1 and the second capacitor electrode PLT2b of the second storage capacitor Cst2 may be electrodes including a semiconductor material having conductivity. Here, the semiconductor material may be changed to a material having conductivity by an ion implantation process (which may also be referred to as a doping process).

[0319] Reference Fig.16 , a gate insulating layer 1604 may be disposed on the active layer ACT1 of the first driving transistor DRT1 , the active layer ACTa of the first sensing transistor SENT1 , the active layer ACT2 of the second driving transistor DRT2 , and the active layer ACTb of the second sensing transistor SENT2 .

[0320] Reference Fig.16 The gate electrode G1 of the first driving transistor DRT1 , the gate electrode Ga of the first sensing transistor SENT1 , the gate electrode G2 of the second driving transistor DRT2 , and the gate electrode Gb of the second sensing transistor SENT2 may be disposed on the gate insulating layer 1604 .

[0321] Reference Fig.16An interlayer insulating layer 1606 may be disposed on the gate electrode G1 of the first driving transistor DRT1 , the gate electrode Ga of the first sensing transistor SENT1 , the gate electrode G2 of the second driving transistor DRT2 , and the gate electrode Gb of the second sensing transistor SENT2 .

[0322] Reference Fig.16 The source electrode and drain electrode (S1 and D1) of the first driving transistor DRT1, the source electrode and drain electrode (Sa and Da) of the first sensing transistor SENT1, the source electrode and drain electrode (S2 and D2) of the second driving transistor DRT2, and the source electrode and drain electrode (Sb and Db) of the second sensing transistor SENT2 can be set on the interlayer insulating layer 1606.

[0323] The source electrode S1 and the drain electrode D1 of the first driving transistor DRT1 may be connected to the active layer ACT1 of the first driving transistor DRT1 through the contact hole of the interlayer insulating layer 1606. The source electrode Sa and the drain electrode Da of the first sensing transistor SENT1 may be connected to the active layer ACTa of the first sensing transistor SENT1 through the contact hole of the interlayer insulating layer 1606. The source electrode S2 and the drain electrode D2 of the second driving transistor DRT2 may be connected to the active layer ACT2 of the second driving transistor DRT2 through the contact hole of the interlayer insulating layer 1606. The source electrode Sb and the drain electrode Db of the second sensing transistor SENT2 may be connected to the active layer ACTb of the second sensing transistor SENT2 through the contact hole of the interlayer insulating layer 1606.

[0324] The source electrode S1 of the first driving transistor DRT1 and the source electrode Sa of the first sensing transistor SENT1 may be electrically connected or integrated with each other.

[0325] For example, the source electrode S1 of the first drive transistor DRT1 and the source electrode Sa of the first sensing transistor SENT1 may be electrically connected to the third capacitor electrode PLT1c of the first storage capacitor Cst1. In another example, the source electrode S1 of the first drive transistor DRT1, the source electrode Sa of the first sensing transistor SENT1, and the third capacitor electrode PLT1c of the first storage capacitor Cst1 may be integrated with each other (i.e., integrally formed as a whole).

[0326] The source electrode S2 of the second driving transistor DRT2 and the source electrode Sb of the second sensing transistor SENT2 may be electrically connected or integrated with each other.

[0327] For example, the source electrode S2 of the second drive transistor DRT2 and the source electrode Sb of the second sensing transistor SENT2 may be electrically connected to the third capacitor electrode PLT2c of the second storage capacitor Cst2. In another example, the source electrode S2 of the second drive transistor DRT2, the source electrode Sb of the second sensing transistor SENT2, and the third capacitor electrode PLT2c of the second storage capacitor Cst2 may be integrated with each other (i.e., integrally formed as a whole).

[0328] The first storage capacitor Cst1 may be configured with a first capacitor electrode PLT1a, a second capacitor electrode PLT1b, and a third capacitor electrode PLT1c.

[0329] In the first storage capacitor Cst1 , the first and third capacitor electrodes PLT1 a and PLT1 c may be electrically connected to the source electrode S1 of the first drive transistor DRT1 , and the second capacitor electrode PLT1 b may be electrically connected to the gate electrode G1 of the first drive transistor DRT1 .

[0330] Therefore, the first storage capacitor Cst1 formed between the source electrode S1 and the gate electrode G1 of the first driving transistor DRT1 may have a structure in which a first capacitor C1 between the first and second capacitor electrodes PLT1a and PLT1b and a second capacitor C2 between the second and third capacitor electrodes PLT1b and PLT1c are connected in parallel to each other.

[0331] The second storage capacitor Cst2 may be configured with a first capacitor electrode PLT2a, a second capacitor electrode PLT2b, and a third capacitor electrode PLT2c.

[0332] In the second storage capacitor Cst2 , the first and third capacitor electrodes PLT2 a and PLT2 c may be electrically connected to the source electrode S2 of the second driving transistor DRT2 , and the second capacitor electrode PLT2 b may be electrically connected to the gate electrode G2 of the second driving transistor DRT2 .

[0333] Therefore, the second storage capacitor Cst2 formed between the source electrode S2 and the gate electrode G2 of the second driving transistor DRT2 may have a structure in which the first capacitor C1 between the first capacitor electrode PLT2a and the second capacitor electrode PLT2b and the second capacitor C2 between the second capacitor electrode PLT2b and the third capacitor electrode PLT2c are connected in parallel to each other.

[0334] Reference Fig.16A first protective layer 1608 may be disposed on the source electrode and drain electrode (S1 and D1) of the first driving transistor DRT1, the source electrode and drain electrode (Sa and Da) of the first sensing transistor SENT1, the source electrode and drain electrode (S2 and D2) of the second driving transistor DRT2, and the source electrode and drain electrode (Sb and Db) of the second sensing transistor SENT2, and a second protective layer 1610 may be disposed on the first protective layer 1608. A planarization layer 1612 may be disposed on the second protective layer 1610.

[0335] Reference Fig.16 A first pixel electrode PE1 of the first light emitting element ED1 and a second pixel electrode PE2 of the second light emitting element ED2 may be disposed on the planarization layer 1612 .

[0336] The first pixel electrode PE1 of the first light emitting element ED1 may be electrically connected to the source electrode S1 of the first driving transistor DRT1 through the contact hole of the planarization layer 1612, the second protective layer 1610, and the first protective layer 1608. The second pixel electrode PE2 of the second light emitting element ED2 may be electrically connected to the source electrode S2 of the second driving transistor DRT2 through the contact hole of the planarization layer 1612, the second protective layer 1610, and the first protective layer 1608.

[0337] Reference Fig.16 A bank 1614 may be provided on the first pixel electrode PE1 of the first light emitting element ED1 and the second pixel electrode PE2 of the second light emitting element ED2. The bank 1614 may have a first opening configured to expose a portion of the first pixel electrode PE1 and a second opening configured to expose a portion of the second pixel electrode PE2.

[0338] The bank 1614 may be provided not only in the non-transmission area NTA as the pixel array area PA but also in the transmission area TA.

[0339] Reference Fig.16 , a first common layer CL1 may be disposed on the bank 1614. For example, the first common layer CL1 may be disposed on a portion of the first pixel electrode PE1 exposed through the first opening of the bank 1614, and may also be disposed on a portion of the second pixel electrode PE2 exposed through the second opening of the bank 1614.

[0340] Reference Fig.16 A first emission layer EML1 may be disposed on the first common layer CL1, the first emission layer EML1 overlaps the first opening of the bank 1614 and the first pixel electrode PE1. A second emission layer EML2 may be disposed on the first common layer CL1, the second emission layer EML2 overlaps the second opening of the bank 1614 and the second pixel electrode PE2.

[0341] Reference Fig.16 The second common layer CL2 may be disposed on the first and second emission layers (EML1 and EML2). The second common layer CL2 may be disposed on the first common layer CL1 such that the second common layer CL2 extends to a region where the first and second emission layers (EML1 and EML2) are not disposed.

[0342] Reference Fig.16 , a common electrode CE may be disposed on the second common layer CL2.

[0343] Reference Fig.16 , the first emission layer EML1 may be disposed only in the region of the first sub-pixel SP1 where the first light emitting element ED1 is formed, and the second emission layer EML2 may be disposed only in the region of the second sub-pixel SP2 where the second light emitting element ED2 is formed. 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 as the pixel array area PA, but also in the transmission area TA.

[0344] Reference Fig.16 The first light emitting element ED1 may be configured by a portion where the first pixel electrode PE1, the first common layer CL1, the first emission layer EML1, the second common layer CL2, and the common electrode CE overlap and stack. The second light emitting element ED2 may be configured by a portion where the second pixel electrode PE2, the first common layer CL1, the second emission layer EML2, the second common layer CL2, and the common electrode CE overlap and stack.

[0345] Reference Fig.16 , a vertical region where transistors ( DRT1 , SENT1 , DRT2 , and SENT2 ), capacitors ( Cst1 and Cst2 ), and light emitting elements ( ED1 and ED2 ) are stacked may correspond to the pixel array layer 610 .

[0346] Many metals for electrodes of transistors (DRT1, SENT1, DRT2, and SENT2), capacitors (Cst1 and Cst2), and light emitting elements (ED1 and ED2) may be provided in the pixel array layer 610. Therefore, the pixel array layer 610 may function as a reflective layer L1 configured to reflect light having a second wavelength.

[0347] Reference Fig.16 , a filling layer 1616 may be disposed on the common electrode CE, and an outer coating layer 1618 may be disposed on the filling layer 1616 .

[0348] A color filter layer CFL may be disposed on the overcoat layer 1618 .

[0349] The color filter layer CFL may include first and second color filters CF1 and CF2. The color filter layer CFL may further include a black matrix BM disposed between the first and second color filters CF1 and CF2, between the first and transmission areas TA, and between the second and transmission areas TA.

[0350] The first and second color filters CF1 and CF2 may overlap the first and second light emitting elements ED1 and ED2, respectively. The first and second color filters CF1 and CF2 may overlap the first and second light emitting areas EA1 and EA2 formed by the first and second light emitting elements ED1 and ED2, respectively.

[0351] Reference Fig.16 , a second substrate 1620 may be disposed on the color filter layer CFL. For example, the second substrate 1620 may be used as an encapsulation layer 630 or an encapsulation substrate.

[0352] Reference Fig.16 , the code pattern layer L2 may be located on the second substrate 1620. The intermediate layer Li located between the reflective layer L1 and the code pattern layer L2 may be configured with a filling layer 1616, an overcoat layer 1618, a color filter layer CFL, and the second substrate 1620.

[0353] Reference Fig.16 , the photosensitive pattern LRP may be provided in the code pattern layer L2 on the second substrate 1620. The photosensitive pattern LRP may be provided in the non-transmission area NTA.

[0354] The photosensitive pattern LRP may be disposed between the first and second emission regions EA1 and EA2. For example, the photosensitive pattern LRP may not overlap the first and second emission regions EA1 and EA2. In another example, the photosensitive pattern LRP may overlap at least a portion of at least one of the first and second emission regions EA1 and EA2.

[0355] For example, the photosensitive pattern LRP may not overlap the first and second color filters CF1 and CF2. In another example, the photosensitive pattern LRP may overlap at least a portion of at least one of the first and second color filters CF1 and CF2.

[0356] Reference Fig.16, in an example where the display panel 210 has a top emission structure, at least corresponding portions of the sub-pixel circuit SPC included in the first sub-pixel SP1 and the second sub-pixel SP2 may overlap with the first light-emitting element ED1 and the second light-emitting element ED2, respectively. The sub-pixel circuit SPC included in the first sub-pixel SP1 may include a first drive transistor DRT1, a first sense transistor SENT1, and a first storage capacitor Cst1. The sub-pixel circuit SPC included in the second sub-pixel SP2 may include a second drive transistor DRT2, a second sense transistor SENT2, and a second storage capacitor Cst2.

[0357] Reference Fig.16 In an example in which the display panel 210 has a top emission structure, among the first electrodes (e.g., the first pixel electrode PE1 and the second pixel electrode PE2) and the second electrodes (e.g., the common electrode CE) included in the first light emitting element ED1 and the second light emitting element ED2, the first electrodes (e.g., the first pixel electrode PE1 and the second pixel electrode PE2) close to the first substrate 211 may be reflective electrodes, and the second electrodes (e.g., the common electrode CE) away from the first substrate 211 may be transparent electrodes.

[0358] Reference Fig.16 In an example where the display panel 210 has a top emission structure, the code pattern layer L2 provided with the photosensitive pattern LRP may be located on the pixel array layer 610. The photosensitive material included in the photosensitive pattern LRP may have a property of transmitting visible light emitted from the light emitting elements (ED1 and ED2). Therefore, even when the photosensitive pattern LRP is disposed close to the viewing surface, the photosensitive pattern LRP may not interfere with visible light emission (emission light or movement of emission light) for image display.

[0359] Fig.17 is an example cross-sectional view of a display panel 210 provided with a photosensitive layer LRL having a plurality of openings as a plurality of code patterns (in a predetermined area or the entire area of ​​the display area DA) according to aspects of the present disclosure. Fig.18 is an example plan view of a display panel 210 provided with a photosensitive layer LRL having a plurality of openings as a plurality of code patterns (in a predetermined area or the entire area of ​​the display area DA) according to aspects of the present disclosure. Fig.19 It is along Fig.18 An example cross-sectional view taken along line BB'.

[0360] It should be noted here that in the following description, for the convenience of description, by focusing on Fig.17 The cross-sectional view of Fig.12 The different features between the cross-sectional views, Fig.18 The floor plan and Fig.15The different features between the floor plans and Fig.19 The cross-sectional view of Fig.16 The different features between the cross-sectional views provide Fig.17 , Fig.18 and Fig.19 Hereinafter, a discussion is provided based on an example in which the light having the second wavelength is infrared light.

[0361] Reference Figures 17 to 19 , a photosensitive layer LRL having a plurality of openings OP may be disposed in the code pattern layer L2.

[0362] Reference Figures 17 to 19 , the photosensitive layer LRL may be disposed in a region including the non-transmission area NTA and the transmission area TA.

[0363] Reference Figures 17 to 19 , the opening OP of the photosensitive layer LRL may be located in the non-transmission area NTA as the pixel array area PA. The opening OP of the photosensitive layer LRL may correspond to the code pattern CP.

[0364] Reference Figures 17 to 19 , each of the openings OP of the photosensitive layer LRL may overlap with one or more of the light emitting areas (EA1, EA2, EA3, and EA4). Fig.17 As shown, the opening OP of the photosensitive layer LRL may overlap with the light emitting area EA4 configured to emit white light. Fig.19 As shown, the opening OP of the photosensitive layer LRL may not overlap with the light emitting areas EA1 and EA2.

[0365] Reference Figures 17 to 19 , a portion of the light with the second wavelength incident on the display panel 210 after being output from the pen 110 may be absorbed by the photosensitive layer LRL. Another portion of the light with the second wavelength incident on the display panel 210 after being output from the pen 110 may pass through one or more openings OP and be reflected by the pixel array layer 610 as the reflective layer L1, and then, the resulting redirected light may pass through one or more openings OP and exit from the display panel 210.

[0366] Reference Figures 17 to 19 In an example where the light having the second wavelength is infrared light, in the transmission area TA, visible light may be transmitted from the front to the back of the display panel 210. However, in the transmission area TA, infrared light cannot be transmitted from the front to the back of the display panel 210 and thus may be absorbed or radiated by the photosensitive layer LRL.

[0367] Reference Fig.18 and Figure 7 , Fig.18At least some of the openings OP of the photosensitive layer LRL 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.

[0368] in addition, Fig.18 Some of the openings OP of the illustrated photosensitive layer LRL 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.

[0369] Fig. 20 is an example cross-sectional view of a display panel 210 provided with a photosensitive layer LRL having a plurality of openings OP as a plurality of code patterns CP in a non-transmission area NTA according to aspects of the present disclosure. Fig.21 is an example plan view of a display panel 210 provided with a photosensitive layer LRL having a plurality of openings OP as a plurality of code patterns CP in a non-transmission area NTA according to aspects of the present disclosure. Fig. 22 It is along Fig.21 Hereinafter, a discussion is provided based on an example in which the light having the second wavelength is infrared light.

[0370] It should be noted here that in the following description, for the convenience of description, by focusing on Fig. 20 The cross-sectional view of Fig.12 and Fig.17 The different features between the cross-sectional views, Fig.21 The floor plan and Fig.15 and Fig.18 The different features between the floor plans and Fig. 22 The cross-sectional view of Fig.16 and Fig.19 The different features between the cross-sectional views provide Fig. 20 , Fig.21 and Fig. 22 Discussion of the configuration.

[0371] Reference Figure 20 to Figure 22 , a photosensitive layer LRL having a plurality of openings OP may be disposed in the code pattern layer L2.

[0372] Reference Figure 20 to Figure 22 , the photosensitive layer LRL may be disposed in the non-transmission area NTA but not in the transmission area TA.

[0373] Reference Figure 20 to Figure 22, the opening OP of the photosensitive layer LRL may be located in the non-transmission area NTA as the pixel array area PA. The opening OP of the photosensitive layer LRL may correspond to the code pattern CP.

[0374] Reference Figure 20 to Figure 22 , the opening OP of the photosensitive layer LRL may overlap with one or more of the light emitting areas (EA1, EA2, EA3, and EA4). Fig. 20 As shown, the opening OP of the photosensitive layer LRL may overlap with the light emitting area EA4 configured to emit white light. Fig. 22 As shown, the opening OP of the photosensitive layer LRL may not overlap with the light emitting areas EA1 and EA2.

[0375] Reference Figure 20 to Figure 22 , a portion of the light with the second wavelength incident on the display panel 210 after being output from the pen 110 may be absorbed by the photosensitive layer LRL. Another portion of the light with the second wavelength incident on the display panel 210 after being output from the pen 110 may pass through one or more openings OP and be reflected by the pixel array layer 610 as the reflective layer L1, and then, the resulting redirected light may pass through one or more openings OP and exit from the display panel 210.

[0376] Reference Figure 20 to Figure 22 , when the light having the second wavelength output from the pen 110 is incident in the transmission area TA of the display panel 210 , the light having the second wavelength may be transmitted from the front surface to the back surface of the display panel 210 in the transmission area TA.

[0377] Reference Figure 20 to Figure 22 In an example where the light having the second wavelength is infrared light, both visible light and infrared light may be transmitted from the front surface to the back surface of the display panel 210 in the transmission area TA.

[0378] Reference Fig.21 and Figure 7 , Fig.21 At least some of the openings OP of the plurality of photosensitive layers LRL 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.

[0379] in addition, Fig.21 Some of the openings OP of the plurality of photosensitive layers LRL shown 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.

[0380] Fig.23 is an example cross-sectional view of a display panel 210 provided with a plurality of transparent patterns TP as a plurality of code patterns CP and a photosensitive layer LRL covering the transparent patterns TP according to aspects of the present disclosure. Fig.24 is an example plan view of a display panel 210 provided with a plurality of transparent patterns TP as a plurality of code patterns CP and a photosensitive layer LRL covering the transparent patterns TP according to aspects of the present disclosure. Fig.25 It is along Fig.24 An example cross-sectional view taken along line D-D'.

[0381] It should be noted here that in the following description, for the convenience of description, by focusing on Fig.23 The cross-sectional view of Fig.12 and Fig.17 The different features between the cross-sectional views, Fig.24 The floor plan and Fig.15 and Fig.18 The different features between the floor plans and Fig.25 The cross-sectional view of Fig.16 and Fig.19 The different features between the cross-sectional views provide Fig.23 , Fig.24 and Fig.25 Discussion of the configuration.

[0382] Reference Figure 23 to Figure 25 , a plurality of transparent patterns TP and a photosensitive layer LRL covering the transparent patterns TP may be disposed in the code pattern layer L2.

[0383] Reference Figure 23 to Figure 25 , for example, the photosensitive layer LRL may be disposed in a region including the non-transmission area NTA and the transmission area TA. In another example, the photosensitive layer LRL may be disposed in a corresponding portion of the non-transmission area NTA, but not in the transmission area TA.

[0384] Reference Figure 23 to Figure 25 , a plurality of transparent patterns TP may be located in the non-transmission area NTA as the pixel array area PA. The transparent pattern TP may be disposed at a code point and correspond to the code pattern CP.

[0385] Reference Figure 23 to Figure 25 , the transparent pattern TP may overlap with one or more of the emission areas EA. Fig.23 As shown, the transparent pattern TP may overlap with the light emitting area EA configured to emit white light. Fig.25 As shown, the transparent pattern TP may not overlap with the light emitting areas EA1 and EA2.

[0386] Reference Figure 23 to Figure 25 , a portion of the light having the second wavelength incident on the display panel 210 after being output from the pen 110 may be absorbed by the photosensitive layer LRL. Another portion of the light having the second wavelength incident on the display panel 210 after being output from the pen 110 may pass through one or more transparent patterns TP and be reflected by the pixel array layer 610 as the reflective layer L1. Thus, the resulting redirected light may pass through one or more transparent patterns TP and come out of the display panel 210.

[0387] Reference Figure 23 to Figure 25 In an example where the light having the second wavelength is infrared light, in the transmission area TA, visible light may be transmitted from the front to the back of the display panel 210. However, in the transmission area TA, infrared light cannot be transmitted from the front to the back of the display panel 210 and thus may be absorbed or radiated by the photosensitive layer LRL.

[0388] In one or more aspects, the display device 100 may include: a first substrate 211; a pixel array layer 610, which includes a plurality of sub-pixels SP and a plurality of signal lines; and a code pattern layer L2, in which a photosensitive material that responds to light with a second wavelength incident from the outside is provided.

[0389] The pen 110 may output light having the second wavelength to the display device 100 , receive some of the light having the second wavelength reflected from the inside of the display device 100 , and output sensing data obtained based on the received light to the display device 100 .

[0390] For example, the photosensitive material disposed in the code pattern layer L2 may be disposed only at multiple code points, may not be disposed only at multiple code points, or may be disposed such that the photosensitive material disposed at multiple code points is thinner than the photosensitive material disposed at points other than the multiple code points.

[0391] A plurality of code points may be located in the non-transmissive area NTA.

[0392] The plurality of code points in the non-transmissive area NTA may correspond to the plurality of code patterns CP.

[0393] Reference Fig.24 and Figure 7 ,and Fig.24 At least some of the transparent patterns TP overlapped by the photosensitive layer LRL 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.

[0394] In addition, Fig.24 Some of the transparent patterns TP overlapped by the photosensitive layer LRL as shown 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.

[0395] Hereinafter, a discussion is provided on an example of configuring a light control structure for pen touch sensing in a display panel 210 having a bottom emission structure.

[0396] Fig.26 2 is an example plan view of a display panel 210 provided with a plurality of light sensitive patterns LRP as a plurality of code patterns CP when the display panel 210 has a bottom emission structure according to aspects of the present disclosure.

[0397] Reference Fig.26 , 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. In an example where the display panel 210 has a bottom emission structure, in order to increase an aperture ratio, the light emitting element ED and the sub-pixel circuit SPC included in one sub-pixel SP may be configured not to overlap each other.

[0398] The display panel 210 having a bottom emission structure may include a light emitting element array area EDA and a sub-pixel circuit array area SPCA that do not overlap each other. Light emitting elements ED may be arranged in the light emitting element array area EDA, and sub-pixel circuits SPC may be arranged in the sub-pixel circuit array area SPCA.

[0399] Reference Fig.26 The light emitting elements ED arranged in the light emitting element array area EDA may include one or more light emitting elements ED configured to emit red light R, one or more light emitting elements ED configured to emit white light W, one or more light emitting elements ED configured to emit blue light B, and one or more light emitting elements ED configured to emit green light G.

[0400] Reference Fig.26 , the light emitting element array area EDA may include a light emitting area formed by the light emitting elements ED, and the sub-pixel circuit array area SPCA may be a non-light emitting area.

[0401] Reference Fig.26 In one or more aspects, the display panel 210 may include a plurality of light sensitive patterns LRP as a plurality of code patterns CP for pen touch sensing. The plurality of light sensitive patterns LRP may be disposed in the sub-pixel circuit array area SPCA as a non-light emitting area.

[0402] Reference Fig.26 and Figure 7 , Fig.26 At least some of the illustrated photosensitive patterns LRP may correspond to a code pattern CP_CELL disposed in two or more data cell regions D-CELL, a code pattern CP_CELL disposed in one data cell region D-CELL, or a code pattern CP_CELL disposed in a portion of one data cell region D-CELL.

[0403] in addition, Fig.26 Some of the illustrated photosensitive patterns LRP 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.

[0404] Fig. 27 and Fig.28 It is along Fig.26 An example cross-sectional view taken along line EE'.

[0405] Reference Fig. 27 and Fig.28 In one or more aspects, the display panel 210 may include a light emitting element array area EDA and a sub-pixel circuit array area SPCA. The light emitting element ED may be disposed in the light emitting element array area EDA, and the sub-pixel circuit SPC may be disposed in the sub-pixel circuit array area SPCA.

[0406] Fig. 27 and Fig.28 1 is a cross-sectional view of a region where a light emitting element ED and a sub-pixel circuit SPC included in one sub-pixel SP are provided. Fig. 27 and Fig.28 Only the driving transistor DRT is shown among two or more transistors (eg, DRT, SCT) and one or more capacitors (eg, Cst) included in the example sub-pixel circuit SPC.

[0407] Reference Fig. 27 and Fig.28 , a gate electrode G of the driving transistor DRT may be disposed on the first substrate 211 , and a gate insulating layer 2610 may be disposed on the gate electrode G of the driving transistor DRT.

[0408] Reference Fig. 27 and Fig.28, an active layer ACT may be disposed on the gate insulating layer 2610, and a source electrode S and a drain electrode D of a driving transistor DRT may be disposed on the active layer ACT. The source electrode S of the driving transistor DRT may be connected to a first side of the active layer ACT, and the drain electrode D of the driving transistor DRT may be connected to a second opposite side of the active layer ACT.

[0409] Reference Fig. 27 and Fig.28 , a protective layer 2620 may be disposed on the driving transistor DRT, a color filter CF may be disposed on the protective layer 2620 , and an overcoat layer 2630 may be configured to cover the color filter CF.

[0410] Reference Fig. 27 and Fig.28 , a pixel electrode PE may be disposed on the overcoat layer 2630. The pixel electrode PE may be electrically connected to the source electrode S of the driving transistor DRT through the contact hole of the overcoat layer 2630 and the protective layer 2620. At least a portion of the pixel electrode PE may overlap the color filter CF.

[0411] Reference Fig. 27 and Fig.28 A bank 2640 may be provided on the pixel electrode PE, and the bank 2640 may include an opening having a size corresponding to a region where the light emitting element ED is formed. A portion of the pixel electrode PE may be exposed through the opening of the bank 2640.

[0412] Reference Fig. 27 and Fig.28 , an element intermediate layer EL including an emission layer may be provided on the bank 2640. The element intermediate layer EL may contact the pixel electrode PE in the opening of the bank 2640. A common electrode CE may be provided on the element intermediate layer EL. At the opening of the bank 2640, the light emitting element ED may be configured with the pixel electrode PE, the element intermediate layer EL, and the common electrode CE.

[0413] Reference Fig. 27 and Fig.28 , an adhesive layer 2650 may be disposed on the common electrode CE, and a metal layer 2660 may be disposed on the adhesive layer 2650. The adhesive layer 2650 and the metal layer 2660 may serve as an encapsulation layer or an encapsulation substrate.

[0414] Reference Fig. 27 and Fig.28 , the display panel 210 may include a reflective layer L1 and a code pattern layer L2 for pen touch sensing.

[0415] Reference Fig. 27 and Fig.28, a vertical region between the first substrate 211 and the adhesive layer 2650 may be referred to as a pixel array layer 610. Since the pixel array layer 610 includes various metals, the pixel array layer 610 may be used as a reflective layer L1 for pen touch sensing.

[0416] Reference Fig. 27 and Fig.28 , in an example where the display panel 210 has a bottom emission structure, light having the second wavelength emitted from the pen 110 may be incident on the first substrate 211 .

[0417] Reference Fig. 27 and Fig.28 , the code pattern layer L2 may include a photosensitive pattern LRP including a photosensitive material capable of absorbing light having a second wavelength or radiating light having one or more wavelengths different from the second wavelength, and the photosensitive pattern LRP may be disposed at a code point in the sub-pixel circuit array area SPCA as a non-light emitting area. The photosensitive pattern LRP may correspond to the code pattern CP for pen touch sensing.

[0418] like Fig. 27 As shown, the code pattern layer L2 may be located under the first substrate 211. Therefore, the photosensitive pattern LRP may be disposed under the first substrate 211.

[0419] like Fig.28 As shown, the code pattern layer L2 may be located on the first substrate 211. Therefore, the photosensitive pattern LRP may be disposed on the first substrate 211.

[0420] The photosensitive material may be disposed outside the pixel array layer 610 and absorb light having the second wavelength or radiate light having one or more wavelengths different from the second wavelength. The color filter CF may be disposed in the pixel array layer 610 and transmit light having the second wavelength.

[0421] 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 (e.g., pixel electrode PE) close to the first substrate 211 may be a transparent electrode, and the second electrode (e.g., common electrode CE) away from the first substrate 211 may be a reflective electrode.

[0422] The color filter CF may be disposed between the first electrode (eg, pixel electrode PE) and the first substrate 211, and light emitted from the light emitting element ED may have one or more wavelengths (eg, one or more visible light wavelengths) different from the second wavelength (eg, one or more infrared wavelengths).

[0423] As described above, a plurality of code patterns CP for pen touch sensing may be formed with a plurality of photosensitive patterns LRP. In one or more aspects, a plurality of code patterns CP for pen touch sensing may be formed with a plurality of openings OP formed in the photosensitive layer LRL. This will be described in more detail below.

[0424] Fig.29 is an example plan view of a display panel 210 provided with a photosensitive layer LRL having a plurality of openings OP as a plurality of code patterns CP when the display panel 210 has a bottom emission structure according to aspects of the present disclosure. Fig.30 and Fig.31 It is along Fig.29 For ease of description, by focusing on Fig.26 , Fig. 27 and Fig.28 The configuration of different features provides Fig.29 , Fig.30 and Fig.31 Discussion of the configuration.

[0425] Reference Fig.29 In one or more aspects, the display panel 210 may include a photosensitive layer LRL having a plurality of openings OP as a plurality of code patterns CP for pen touch sensing.

[0426] The photosensitive layer LRL may be disposed in both one or more light emitting element array regions EDA including the light emitting region and one or more sub-pixel circuit array regions SPCA as the non-light emitting region. It should be noted that a plurality of openings OP may be located in one or more sub-pixel circuit array regions SPCA as the non-light emitting region.

[0427] Reference Fig.30 and Fig.31 In one or more aspects, the display panel 210 may include a light emitting element array area EDA and a sub-pixel circuit array area SPCA. The light emitting element ED may be disposed in the light emitting element array area EDA, and the sub-pixel circuit SPC may be disposed in the sub-pixel circuit array area SPCA.

[0428] Fig.30 and Fig.31 1 is a cross-sectional view of a region where a light emitting element ED and a sub-pixel circuit SPC included in one sub-pixel SP among a plurality of sub-pixels SP are provided. Fig.30 and Fig.31 Only the driving transistor DRT is shown among two or more transistors (eg, DRT, SCT) and one or more capacitors (eg, Cst) included in one sub-pixel circuit SPC.

[0429] Reference Fig.30 and Fig.31 , the display panel 210 may include a reflective layer L1 and a code pattern layer L2 for pen touch sensing.

[0430] Reference Fig.30 and Fig.31 , a vertical region between the first substrate 211 and the adhesive layer 2650 may be referred to as a pixel array layer 610. Since the pixel array layer 610 includes various metals, the pixel array layer 610 may be used as a reflective layer L1 for pen touch sensing.

[0431] Reference Fig.30 and Fig.31 , in an example where the display panel 210 has a bottom emission structure, light having the second wavelength emitted from the pen 110 may be incident on the first substrate 211 .

[0432] Reference Fig.30 and Fig.31 , the code pattern layer L2 may include a photosensitive layer LRL including a photosensitive material capable of absorbing light having a second wavelength or radiating light having one or more wavelengths different from the second wavelength.

[0433] The photosensitive layer LRL may be provided in both the light emitting element array area EDA including the light emitting area and the sub-pixel circuit array area SPCA which is the non-light emitting area.

[0434] The photosensitive layer LRL may have a plurality of openings OP located at a plurality of code points in the sub-pixel circuit array area SPCA as a non-light emitting area. The plurality of openings OP may correspond to a code pattern CP for pen touch sensing.

[0435] like Fig.30 As shown, the code pattern layer L2 may be located under the first substrate 211. Therefore, a photosensitive layer LRL having a plurality of openings OP may be disposed under the first substrate 211.

[0436] like Fig.31 As shown, the code pattern layer L2 may be located on the first substrate 211. Therefore, a photosensitive layer LRL having a plurality of openings OP may be disposed on the first substrate 211.

[0437] Reference Fig.31 , for example, the code pattern layer L2 may be included in the pixel array layer 610. The photosensitive layer LRL having the plurality of openings OP may be disposed on at least one side of a corresponding gate electrode G of at least one transistor including the driving transistor DRT.

[0438] The photosensitive material included in the photosensitive layer LRL may be disposed inside or outside the pixel array layer 610 and absorb light having the second wavelength or radiate light having one or more wavelengths different from the second wavelength. The color filter CF may be disposed in the pixel array layer 610 and transmit light having the second wavelength.

[0439] The photosensitive material included in the photosensitive layer LRL can transmit the light emitted from the light emitting element ED. The photosensitive material included in the photosensitive layer LRL can transmit the light emitted from the light emitting element ED and then passing through the color filter CF. According to these configurations, even when the photosensitive layer LRL overlaps the light emitting element ED, image display can be performed normally without reducing the light emitting performance.

[0440] Reference Fig.29 and Figure 7 , Fig.29 At least some of the openings OP of the photosensitive layer LRL 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.

[0441] in addition, Fig.29 Some of the openings OP of the illustrated photosensitive layer LRL 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.

[0442] The example implementations described herein can be briefly discussed as follows.

[0443] According to example embodiments described herein, a display device may be provided, the display device including a display panel configured to display an image, the display panel including a transmission area allowing transmission of light having a first wavelength and a non-transmission area different from the transmission area, and the display panel including: a first substrate; a pixel array layer disposed on the first substrate and including a plurality of sub-pixels and a plurality of signal lines disposed in the non-transmission area; and a code pattern layer in which a photosensitive material responsive to light having a second wavelength different from the first wavelength is disposed, the light having the second wavelength being incident from outside the display device.

[0444] For example, the photosensitive material may be arranged in one of the following ways: arranged only at multiple code points; arranged at points other than multiple code points; and arranged so that the photosensitive material arranged at multiple code points is thinner than the photosensitive material arranged at points other than multiple code points.

[0445] In one or more aspects, a plurality of code points can be located in the non-transmissive region.

[0446] In one or more aspects, light having the second wavelength can be reflected from the pixel array layer.

[0447] For example, the code pattern layer may include a photosensitive material, and include a plurality of photosensitive patterns spaced apart from each other.

[0448] In one or more aspects, a plurality of photosensitive patterns may be disposed at a plurality of code points in the non-transmission region and correspond to a plurality of code patterns, respectively.

[0449] In one or more aspects, light can pass through spaces between the plurality of photosensitive patterns.

[0450] In one or more aspects, each of the plurality of photosensitive patterns may absorb light having the second wavelength, or convert light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0451] In another example, the code pattern layer may include a photosensitive layer including a photosensitive material. In one or more aspects, the photosensitive layer may include a plurality of openings spaced apart from each other. The plurality of openings may be disposed at a plurality of code points in the non-transmission region and correspond to a plurality of code patterns, respectively.

[0452] In one or more aspects, light having a second wavelength can pass through the plurality of openings, and the photosensitive layer can absorb the light having the second wavelength, or convert the light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0453] In another example, the code pattern layer may include a plurality of transparent patterns spaced apart from each other, and a photosensitive layer covering the plurality of transparent patterns, and the photosensitive layer includes a photosensitive material.

[0454] In one or more aspects, a plurality of transparent patterns may be disposed at a plurality of code points in the non-transmission region and respectively correspond to a plurality of code patterns.

[0455] In one or more aspects, the light having the second wavelength may pass through the plurality of transparent patterns.A portion of the photosensitive layer overlapping the plurality of transparent patterns may be thinner than a portion of the photosensitive layer not overlapping the plurality of transparent patterns.

[0456] In one or more aspects, the photosensitive layer can absorb light having the second wavelength, or convert light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0457] In one or more aspects, the first wavelength can be included in the visible light band. In one or more aspects, the second wavelength can be a wavelength that is not included in the visible light band. For example, the second wavelength can be included in the infrared band.

[0458] In one or more aspects, the display panel may further include a plurality of color filters located between the pixel array layer and the code pattern layer and disposed in the non-transmission region. In one or more aspects, the plurality of color filters may include a material capable of transmitting light having a second wavelength.

[0459] In one or more aspects, the display panel may further include a plurality of color filters in the pixel array layer. In one or more aspects, the plurality of color filters may allow transmission of light having the second wavelength.

[0460] In one or more aspects, at the point where the photosensitive material of the code pattern layer is located, light having a second wavelength incident on the display panel may be absorbed by the photosensitive material, or converted by the photosensitive material into light having one or more other wavelengths and radiated in the form of light having one or more other wavelengths.

[0461] In one or more aspects, at a point in the code pattern layer where no photosensitive material is present, light having a second wavelength incident on the display panel can pass through the code pattern layer without being responded to by the photosensitive material in the code pattern layer, and be reflected by the pixel array layer, so that the reflected light exits the display panel.

[0462] For example, each of the plurality of sub-pixels may include a light emitting element and a sub-pixel circuit, and at least a portion of the sub-pixel circuit may overlap with the light emitting element. In this example, among the first electrode and the second electrode included in the light emitting element, the first electrode close to the first substrate may be a reflective electrode, and the second electrode away from the first substrate may be a transparent electrode.

[0463] In this implementation, the code pattern layer may be located in the pixel array layer. For example, the code pattern layer may be located on or above at least one transistor and a light emitting element.

[0464] In one or more aspects, the photosensitive material may have a property of transmitting light having a first wavelength emitted from the light emitting element.

[0465] In one or more aspects, the display panel may further include an encapsulation layer on the pixel array layer, and the code pattern layer may be on the encapsulation layer or between the pixel array layer and the encapsulation layer.

[0466] In another example, each of the plurality of sub-pixels included in the display panel may include a light emitting element and a sub-pixel circuit, and the sub-pixel circuit may not overlap with the light emitting element. In this example, among the first electrode and the second electrode included in the light emitting element, the first electrode close to the first substrate may be a transparent electrode, and the second electrode far from the first substrate may be a reflective electrode.

[0467] In this implementation, the code pattern layer may be located in or below the pixel array layer. For example, the code pattern layer may be located below at least one transistor and a light emitting element.

[0468] In one or more aspects, one or more of the plurality of code points in the non-transmission region may overlap with one or more of the luminescent regions in the non-transmission region. In one or more aspects, one or more of the plurality of code points in the non-transmission region may overlap with the non-luminescent regions in the non-transmission region.

[0469] In one or more aspects, the plurality of code points in the non-transmissive region may correspond to a plurality of code patterns for pen touch sensing.

[0470] For example, one or more of the plurality of code patterns may overlap with one or more of the light emitting regions in the non-transmission region. In another example, one or more of the plurality of code patterns may overlap with the non-light emitting region in the non-transmission region.

[0471] In one or more aspects, the display device may further include: a communication module configured to receive sensing data from the pen; and a controller configured to control an image corresponding to the sensing data or an application screen corresponding to the coordinate data to be displayed on the display panel.

[0472] According to the example embodiments described herein, a pen touch system may be provided, the pen touch system including a display device and a pen. In one or more aspects, the display device may include: a first substrate including a transmission area that allows transmission of light having a first wavelength and a non-transmission area different from the transmission area; a pixel array layer including a plurality of sub-pixels and a plurality of signal lines; and a code pattern layer in which a photosensitive material responsive to light having a second wavelength different from the first wavelength is disposed, and the light having the second wavelength is incident from the outside of the display device. In one or more aspects, after outputting the light having the second wavelength to the display device, the pen may receive the light having the second wavelength redirected by the display device or the light having one or more wavelengths different from the second wavelength, and output the sensing data to the display device.

[0473] In one or more aspects, the photosensitive material can be arranged in one of the following ways: arranged only at multiple code points; arranged at points other than multiple code points; and arranged so that the photosensitive material arranged at multiple code points is thinner than the photosensitive material arranged at points other than multiple code points.

[0474] In one or more aspects, a plurality of code points can be located in the non-transmissive region.

[0475] In one or more aspects, the code pattern layer may include a photosensitive layer including a photosensitive material. In one or more aspects, the photosensitive layer may be located in the non-light emitting region and include a plurality of openings spaced apart from each other.

[0476] In one or more aspects, the transmission region allows transmission of not only light having the second wavelength but also light having the first wavelength.

[0477] In one or more aspects, the code pattern layer may include: a plurality of data cell regions arranged in rows and columns; a plurality of first cell guide lines disposed between adjacent data cell regions along a row direction; and a plurality of second cell guide lines disposed between adjacent data cell regions along a column direction.

[0478] In one or more aspects, the multiple code patterns corresponding to the multiple code points may include: a plurality of first guide code patterns respectively used to represent a plurality of first unit guide lines; a plurality of second guide code patterns respectively used to represent a plurality of second unit guide lines; and a plurality of data code patterns respectively set in a plurality of data unit areas and arranged in rows and columns.

[0479] In one or more aspects, the pattern in which the plurality of data code patterns are arranged may be different for each data unit region. In one or more aspects, the plurality of data code patterns respectively included in the plurality of data unit regions may be encrypted patterns representing unique coordinate pairs and have unique setting position patterns corresponding to the unique coordinates.

[0480] According to various aspects described herein, a display device and a pen touch system capable of more accurately sensing a pen touch based on optical technology may be provided.

[0481] According to aspects described herein, a transparent display device and a pen touch system capable of sensing a pen touch based on an optical technology may be provided.

[0482] According to aspects described herein, since a code pattern for pen touch sensing based on an optical technology is provided in a non-transmissive region, 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.

[0483] According to various aspects described herein, a display device and a pen touch system may be provided, which include a display panel in which a light control structure capable of allowing a pen to sense a touch is integrated.

[0484] According to aspects described herein, a display device and a pen touch system may be provided, which include a display panel in which a light control structure configured not to affect light emitting performance for image display is integrated.

[0485] According to various aspects described herein, a display device and a pen touch system may be provided, which include a display panel in which a reflective structure and an absorption structure (or a radiation structure) are integrated as a light control structure configured to implement pen touch sensing.

[0486] According to aspects described herein, a display device and a pen touch system may be provided, which include a display panel in which a pixel array layer serving as a reflective structure is provided, thereby implementing pen touch sensing.

[0487] According to the various aspects described herein, a display device and a pen touch system can be provided, which include a display panel in which a light control structure configured to allow a pen to sense touch is integrated, and thus provides the advantages of reducing the thickness of the display device and helping to simplify the assembly process of the display device. Therefore, the various aspects described herein can help reduce weight and optimize the process of the display device.

[0488] According to the various aspects described herein, 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 thus provide the advantage of further helping to reduce the weight of the display device.

[0489] The exemplary embodiments of the present disclosure described above have been 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 basic features of the present disclosure. For example, various modifications may be made to specific components of the exemplary embodiments.

[0490] The above description and the accompanying drawings provide examples of the technical concept of the present invention for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical concept of the present disclosure. Therefore, the scope of the present disclosure is not limited to the embodiments shown, but should be given the widest scope consistent with the claims.

[0491] The protection scope of the present disclosure shall be interpreted according to the claims, and all technical concepts within the scope of the claims shall be interpreted as being included in the scope of the present invention.

Claims

1. A display device, comprising: a display panel configured to display an image, the display panel including a transmission area allowing transmission of light having a first wavelength and a non-transmission area different from the transmission area, Wherein, the display panel comprises: a first substrate; a pixel array layer including a plurality of sub-pixels and a plurality of signal lines disposed in the non-transmission area; and a code pattern layer, in which a photosensitive material responsive to light having a second wavelength different from the first wavelength is disposed, the light having the second wavelength being incident from outside the display device, wherein the photosensitive material is arranged in one of the following ways: arranged at a plurality of code points; arranged at points other than the plurality of code points; and arranged so that the photosensitive material arranged at the plurality of code points is thinner than the photosensitive material arranged at points other than the plurality of code points, and Wherein, the plurality of code points are located in the non-transmitting area.

2. The display device according to claim 1, wherein: Light having the second wavelength is reflected from the pixel array layer.

3. The display device according to claim 1, wherein: The code pattern layer includes the photosensitive material and includes a plurality of photosensitive patterns spaced apart from each other, and Wherein, the multiple photosensitive patterns are arranged at the multiple code points.

4. The display device according to claim 3, wherein: light having the second wavelength passes through spaces between the plurality of photosensitive patterns, and Each of the plurality of photosensitive patterns absorbs the light having the second wavelength, or converts the light having the second wavelength into light having one or more other wavelengths and radiates the light having the one or more other wavelengths.

5. The display device according to claim 1, wherein: The code pattern layer includes a photosensitive layer including the photosensitive material, and The photosensitive layer includes a plurality of openings, and the plurality of openings are arranged at the plurality of code points in the non-transmitting area.

6. The display device according to claim 5, wherein: Light having the second wavelength passes through the plurality of openings, and the photosensitive layer absorbs the light having the second wavelength, or converts the light having the second wavelength into light having one or more other wavelengths and radiates the light having the one or more other wavelengths.

7. The display device according to claim 1, wherein: The code pattern layer includes a plurality of transparent patterns spaced apart from each other and a photosensitive layer covering the plurality of transparent patterns, and the photosensitive layer includes the photosensitive material, Wherein, the plurality of transparent patterns are arranged at the plurality of code points in the non-transmission area.

8. The display device according to claim 7, wherein: The light having the second wavelength passes through the plurality of transparent patterns, wherein a portion of the photosensitive layer overlapping with the plurality of transparent patterns is thinner than a portion of the photosensitive layer not overlapping with the plurality of transparent patterns, and The photosensitive layer absorbs the light having the second wavelength, or converts the light having the second wavelength into light having one or more other wavelengths and radiates the light having the one or more other wavelengths.

9. The display device according to claim 1, further comprising: a plurality of color filters, the plurality of color filters being located between the pixel array layer and the code pattern layer and being disposed in the non-transmission region, The plurality of color filters include a material capable of transmitting light having the second wavelength.

10. The display device according to claim 1, further comprising: a plurality of color filters located in the pixel array layer, The plurality of color filters allow transmission of light having the second wavelength.

11. The display device according to claim 1, wherein: At a point where the photosensitive material of the code pattern layer is located, light having the second wavelength incident on the display panel is absorbed by the photosensitive material or converted by the photosensitive material into light having one or more other wavelengths and radiated in the form of light having the one or more other wavelengths, and Wherein, at a point on the code pattern layer where the photosensitive material does not exist, light with the second wavelength incident on the display panel passes through the code pattern layer without being responded to by the photosensitive material in the code pattern layer and is reflected by the pixel array layer, and the reflected light comes out of the display panel.

12. The display device according to claim 1, wherein: The code pattern layer is located on the pixel array layer, and The photosensitive material has a characteristic of transmitting light having the first wavelength emitted from a light emitting element included in each of the plurality of sub-pixels.

13. The display device according to claim 12, further comprising: an encapsulation layer located on the pixel array layer, Wherein, the code pattern layer is located on the encapsulation layer or between the pixel array layer and the encapsulation layer.

14. The display device according to claim 11, wherein: The code pattern layer is located inside the pixel array layer or below the pixel array layer.

15. The display device according to claim 1, wherein: One or more of the plurality of code points in the non-transmission area overlaps with one or more of the light-emitting areas in the non-transmission area.

16. The display device according to claim 1, wherein: One or more of the plurality of code points in the non-transmission region overlaps with a non-luminescent region in the non-transmission region.

17. A pen touch system comprising: A display device, the display device comprising: a first substrate, the first substrate comprising a transmission area allowing transmission of light having a first wavelength and a non-transmission area different from the transmission area; a pixel array layer, the pixel array layer comprising a plurality of sub-pixels and a plurality of signal lines; and a code pattern layer, in which a photosensitive material responsive to light having a second wavelength different from the first wavelength is disposed; and a pen configured to output light having the second wavelength to the display device, receive light having the second wavelength or light having one or more wavelengths different from the second wavelength redirected by the display device, and output sensing data to the display device, wherein the photosensitive material is arranged in one of the following ways: arranged at a plurality of code points; arranged at points other than the plurality of code points; and arranged so that the photosensitive material arranged at the plurality of code points is thinner than the photosensitive material arranged at points other than the plurality of code points, and Wherein, the plurality of code points are located in the non-transmitting area.

18. The pen touch system according to claim 17, wherein: The code pattern layer includes a photosensitive layer including the photosensitive material, and the photosensitive layer is located in a non-light emitting region and includes a plurality of openings spaced apart from each other.

19. The pen touch system according to claim 17, wherein: The transmission region allows transmission of light having the second wavelength.

20. The pen touch system according to claim 17, wherein: The code pattern layer comprises: a plurality of data unit areas, the plurality of data unit areas respectively corresponding to portions of the display area including the transmission area and the non-transmission area and arranged in rows and columns; a plurality of first unit guide lines, each of the plurality of first unit guide lines being disposed between adjacent data unit regions along a row direction; and a plurality of second unit guide lines, each of the plurality of second unit guide lines being arranged between adjacent data unit regions along a column direction, The multiple code patterns corresponding to the multiple code points include: a plurality of first guide code patterns, wherein the plurality of first guide code patterns respectively represent the plurality of first unit guide lines; a plurality of second guide code patterns, the plurality of second guide code patterns respectively representing the plurality of second unit guide lines; and a plurality of data code patterns, the plurality of data code patterns being respectively disposed in the plurality of data unit regions and arranged in rows and columns, and The plurality of data code patterns respectively included in the plurality of data unit regions have unique arrangement position patterns corresponding to unique coordinates.

Images