Display device and pen touch system

Abstract

The present disclosure provides a display device and a pen touch system. The display device includes: a first substrate; a plurality of first color filters included in the color filter layer and transmitting first color light having a first color wavelength included in a first wavelength band; a plurality of second color filters included in the color filter layer and transmitting second color light having a second color wavelength included in the first wavelength band; a plurality of third color filters included in the color filter layer and transmitting third color light having a third color wavelength included in the first wavelength band; and a photosensitive layer responsive to light having a second wavelength included in a second wavelength band different from the first wavelength band, and including two or more openings overlapping two or more of the plurality of second color filters.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0099433 filed on July 31, 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 and organic light emitting diode (OLED) display devices 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 also made progress. 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 optical technology.

[0007] One or more aspects of the present disclosure may provide a display device and a pen touch system capable of sensing a pen touch based on an optical technology by using one or more color filters included in a display panel.

[0008] 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.

[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 is integrated, the light control structure being configured to enable pen touch sensing without affecting light emitting performance for image display.

[0010] According to an example embodiment of the present disclosure, a display device may be provided, the display device comprising: a first substrate; a plurality of first color filters, the plurality of first color filters being included in a color filter layer and transmitting a first color light having a first color wavelength included in a first band; a plurality of second color filters, the plurality of second color filters being included in the color filter layer and transmitting a second color light having a second color wavelength included in the first band; a plurality of third color filters, the plurality of third color filters being included in the color filter layer and transmitting a third color light having a third color wavelength included in the first band, and a photosensitive layer, the photosensitive layer being responsive to light having a second wavelength included in a second band different from the first band and comprising two or more openings.

[0011] The two or more openings may overlap with two or more second color filters of the plurality of second color filters.

[0012] Each of the plurality of second color filters may absorb light having a second wavelength.

[0013] The photosensitive layer may reflect 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.

[0014] The second color wavelength may be shorter than the first color wavelength and longer than the third color wavelength.

[0015] According to an example embodiment 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 including: a first substrate; a plurality of color filters that transmit light having a first wavelength included in a first band; and a photosensitive layer that responds to light having a second wavelength included in a second band different from the first band, the pen being configured to: output the light having the second wavelength to the display device; receive redirected light generated from the display device; and output sensing data to the display device based on the redirected light.

[0016] The plurality of color filters may include: a plurality of first color filters, the plurality of first color filters being located in a color filter layer and transmitting a first color light having a first color wavelength included in a first band; a plurality of second color filters, the plurality of second color filters being located in the color filter layer and transmitting a second color light having a second color wavelength included in the first band; and a plurality of third color filters, the plurality of third color filters being located in the color filter layer and transmitting a third color light having a third color wavelength included in the first band.

[0017] The photosensitive layer may include two or more openings.

[0018] The two or more openings may overlap with two or more second color filters of the plurality of second color filters.

[0019] Each of the plurality of second color filters may absorb light having a second wavelength.

[0020] The photosensitive layer may reflect 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.

[0021] 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.

[0022] According to one or more aspects of the present disclosure, a display device and a pen touch system capable of sensing a pen touch based on an optical technology by using one or more color filters included in a display panel 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 is integrated, the light control structure being configured to enable pen touch sensing without affecting light emitting performance for image display.

[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 light control structure configured to allow a pen to sense touch is integrated, and thereby provide 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 may help reduce weight and optimize the process of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 An example pen touch system according to aspects of the present disclosure is shown;

[0028] Figure 2 An example display device according to aspects of the present disclosure is shown;

[0029] Figure 3A and Figure 3B An example pen according to aspects of the present disclosure is shown;

[0030] Figure 4 An example equivalent circuit of a sub-pixel included in a display device according to aspects of the present disclosure is shown;

[0031] Figure 5 is an example plan view of a display panel according to aspects of the present disclosure;

[0032] Figure 6 is an example plan view of a sub-pixel in an example in which a display panel has a bottom transmission structure according to aspects of the present disclosure;

[0033] Figure 7 is an example plan view of a display panel having a bottom transmissive structure according to aspects of the present disclosure;

[0034] Figure 8 and Fig. 9 is an example cross-sectional view of a display panel having a bottom transmissive structure according to aspects of the present disclosure;

[0035] Fig.10 shows an example configuration of a code pattern in a display panel according to aspects of the present disclosure; Fig.11 An example scheme of setting a code pattern in a display panel according to aspects of the present disclosure is shown;

[0036] Fig.12 shows example light transmission spectra of color filters disposed in display panels according to aspects of the present disclosure;

[0037] Fig.13 and Fig.14 is an example cross-sectional view of a display panel according to aspects of the present disclosure;

[0038] Fig.15 is an example plan view of a code pattern deposition structure in a display panel having a bottom transmission structure according to aspects of the present disclosure;

[0039] Fig.16 is along Fig.15 An example cross-sectional view taken along line AA' in a display panel of FIG.

[0040] Fig.17 is along Fig.15 An example cross-sectional view taken along line BB' in a display panel;

[0041] Fig.18 is along Fig.15 An example cross-sectional view taken along line AA' in a display panel of FIG.

[0042] Fig.19 is along Fig.15An example cross-sectional view taken along line BB' in a display panel;

[0043] Fig. 20 is an example plan view of a sub-pixel in an example in which a display panel has a top transmission structure according to aspects of the present disclosure;

[0044] Fig.21 is an example plan view of a display panel having a top transmissive structure according to aspects of the present disclosure;

[0045] Fig. 22 is an example cross-sectional view of a display panel having a top transmissive structure according to aspects of the present disclosure;

[0046] Fig.23 is an example plan view of a code pattern deposition structure in a display panel having a top transmission structure according to aspects of the present disclosure;

[0047] Fig.24 is along Fig.23 An example cross-sectional view taken along line AA' in a display panel of FIG.

[0048] Fig.25 is along Fig.23 An example cross-sectional view taken along line BB' in a display panel of FIG. DETAILED DESCRIPTION

[0049] Reference will now be made in detail to the 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 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 shown in the drawings for describing the present disclosure are given as examples only. Therefore, the present disclosure is not limited to the illustrations in the drawings. Where the terms "comprising", "having", "including", "containing", "constituting", "comprising", "formed by", 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.

[0050] 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. By way of example, A, B, and / or C may refer to only A, only B, or only C; any or some combination of A, B, and C; or all of A, B, and C.

[0051] For the expression that an element or layer is “connected”, “coupled” or “attached” to another element or layer, the element or layer may be not only directly connected, coupled or attached to another element or layer, but may also be indirectly connected, coupled or attached to another element or layer by using one or more intervening elements or layers “disposed” or “inserted” between the elements or layers, unless otherwise specified. In addition, another element may be included in one or more of two or more elements that are connected, combined, coupled or contacted to each other.

[0052] When an element or layer is expressed as being “contacting,” “overlapping,” etc., with another element or layer, the element or layer may not only be directly in contact with, overlap, etc., with the other element or layer, but may also be indirectly in contact with, overlap, etc., with the other element or layer with one or more intervening elements or layers being “disposed” or “interposed” between the elements or layers, unless otherwise specified.

[0053] In the case of describing a positional relationship, for example, in the case of using "on", "above", "below", "above", "below", "beside", "near", etc. to describe the positional relationship between two parts, one or more other parts may be located between the two parts, unless more restrictive terms such as "immediately", "directly" or "tightly" are used. 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", "upper", "lower", etc. refer to an arbitrary reference system. In describing a temporal relationship, for example, when the temporal sequence is described as "after", "subsequently", "next", or "before", unless more restrictive terms such as "just", "immediately" or "directly" are used, discontinuous situations may be included. When constructing an element, the element should be interpreted as including an error or tolerance range even if no explicit description of such an error or tolerance range is provided. 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. By way of example, A, B, and / or C may refer to only A, only B, or only C; any or some combination of A, B, and C; or all of A, B, and C. In the following, various example 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 drawings may be different from the actual proportion. Therefore, the elements shown are not limited to the specific proportions in which they are shown in the drawings.

[0054] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0055] Figure 1 An example pen touch system 10 is shown in accordance with aspects of the present disclosure.

[0056] Reference Figure 1In 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 according to the applied touch and / or touch position, 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.

[0057] Reference Figure 1 In one or more example embodiments, the pen touch system 10 may include a display device 100 and a pen 110 .

[0058] 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.

[0059] 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 technology. 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 technology (hereinafter, the optical technology may be referred to as optical pen touch sensing).

[0060] 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.

[0061] 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).

[0062] 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.

[0063] For example, an infrared band (e.g., about 780 nm to 1000 μm) can be classified into a near infrared band (e.g., 750 nm to 3 μm), a mid-infrared band (e.g., 3 μm to 25 μm), and a far infrared band (e.g., 25 μm to 1000 μm). In this example, the second wavelength may be included in the near infrared band, or may be included in the mid-infrared band or the far infrared band. For example, the second band for optical pen touch sensing may be an infrared band (e.g., 780 nm to 1000 μm), or may include one or more of a near infrared band (e.g., 750 nm to 3 μm), a mid-infrared band (e.g., 3 μm to 25 μm), and a far infrared band (e.g., 25 μm to 1000 μm).

[0064] 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.

[0065] As a light output function, the pen 110 may output light having a second wavelength.

[0066] Depending on the internal structure of the display device 100, a portion of the light with the second wavelength output from the pen 110 may be absorbed inside the display device 100, and another portion of the light with the second wavelength output from the pen 110 may be reflected or converted into light with one or more other wavelengths inside the display device 100, and redirected or radiated to move outside the display device 100.

[0067] As a light receiving function, the pen 110 may receive light (hereinafter, this 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 at the inside of 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 to the outside of the display device 100. In addition, as a touch sensing function, the pen 110 may sense whether a touch (e.g., touch input) has been applied and / or a touched position (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.

[0068] 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 has been applied (e.g., a touch event or a touch input) 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 a touch position.

[0069] 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 inside the display device 100, and another portion of the light with the second wavelength output from the pen 110 may be reflected or converted into light with one or more wavelengths inside the display device 100 and radiated in the form of light with one or more other wavelengths, and thereafter, redirected to move outside the display device 100.

[0070] 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.

[0071] 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.

[0072] Reference Figure 2In 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.

[0073] 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.

[0074] 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.

[0075] 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. For example, the first direction may be a column direction or a row direction.

[0076] 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.

[0077] 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.

[0078] 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 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 .

[0086] 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.

[0087] 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.

[0088] In one or more aspects, the gate driving circuit 230 included in the display device 100 may be disposed in the non-display area NDA. In one or more aspects, the gate driving circuit 230 may be configured to overlap with the display area DA of the display panel 210. For example, the gate driving circuit 230 may be disposed in the entire display area DA, or may be disposed only in 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 driving circuit 230 is configured to overlap with the display area DA, the gate driving circuit 230 may be configured not to overlap with the sub-pixels SP, or may be configured to overlap with one or more of the sub-pixels SP or all of the sub-pixels SP.

[0089] 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.

[0090] 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 .

[0091] The controller 240 can generate at least one data driving control signal DCS for controlling data driving and at least one gate driving control signal GCS for controlling gate driving by using display control signals (e.g., vertical synchronization signal, horizontal synchronization signal, data enable signal, clock signal, etc.) received from the host system 250.

[0092] 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 .

[0093] 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 .

[0094] The controller 240 may receive image data input from the host system 250 and supply image data DATA readable by the data driving circuit 220 based on the input image data to the data driving circuit 220 .

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] The touch sensing circuit can detect whether a touch object such as a finger, pen 110, etc. has applied a touch (e.g., a finger touch or a pen touch), or detect the position of the touch by sensing the touch sensor. This touch sensing may be a touch sensing scheme different from optical pen touch sensing.

[0101] 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.

[0102] 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.

[0103] The display device 100 may further include a power supply circuit for supplying various types of power to the display driving circuit.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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 may be an electrode commonly disposed in all or some of the sub-pixels SP 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.

[0112] 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 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 plurality of sub-pixels SP, and further extend to the non-light emitting region. Each light emitting element ED may be configured by the corresponding pixel electrode PE, the corresponding emission layer EML, the first common layer CL1 and the second common layer CL2, and the corresponding portion of the common electrode CE overlapping 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 each other.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] The scanning transistor SCT may be turned on or off by a scanning signal SC as a type of gate signal carried by a scanning line SCL as a type of gate line GL, and controls the electrical connection between the second node N2 of the driving transistor DRT and the data line DL. A drain electrode or a source electrode of the scanning transistor SCT may be electrically connected to the data line DL. A source electrode or a drain electrode of the scanning transistor SCT may be electrically connected to the second node N2 of the driving transistor DRT. A gate electrode of the scanning transistor SCT may be electrically connected to the scanning line SCL.

[0120] 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.

[0121] Each of the driving transistor DRT and the scanning transistor SCT may be an n-type transistor or a p-type transistor.

[0122] 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.

[0123] like Figure 2 As shown, the sub-pixel circuit SPC may include two transistors (2T: T1 and T2) and a 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.

[0124] 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.

[0125] 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.

[0126] Reference Figure 2 In one or more aspects, the display device 100 may include a communication module 260 for communicating with the pen 110 .

[0127] 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.

[0128] 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.

[0129] 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 and a communication device 350 , a pen tip 360 , and a housing 380 .

[0130] The pen tip 360 may be an element for contacting the display device 100 .

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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 .

[0138] 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.

[0139] 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 , the pen tip 360 , and the battery 370 .

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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, the discussion is based on the fact that each of the plurality of sub-pixels SP has Figure 4 An example of a structure (i.e., an equivalent circuit) is provided.

[0150] Figure 5 is an example plan view of a display panel 210 according to aspects of the present disclosure.

[0151] Reference Figure 5 In one or more aspects, the display panel 210 may include a plurality of sub-pixel array regions SPL. Each of the plurality of sub-pixel array regions SPL may include a plurality of sub-pixels SP.

[0152] For example, a plurality of sub-pixel array regions SPL may be disposed adjacent to each other in a first direction. A plurality of sub-pixels SP included in each of the plurality of sub-pixel array regions SPL may be disposed adjacent to each other in a second direction. For example, the first direction may be a column direction, and the second direction may be a row direction. In another example, the first direction may be a row direction, and the second direction may be a column direction. Hereinafter, for ease of explanation only, 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.

[0153] The plurality of sub-pixels SP may include a plurality of first sub-pixels SP1 emitting light of a first color, a plurality of second sub-pixels SP2 emitting light of a second color, and a plurality of third sub-pixels SP3 emitting light of a third color.

[0154] The first color light may have a first color wavelength included in a first wavelength band.

[0155] The second color light may have a second color wavelength included in the first wavelength band.

[0156] The light of the third color may have a third color wavelength included in the first wavelength band.

[0157] The plurality of sub-pixels SP may further include a plurality of fourth sub-pixels SP4 emitting light of a fourth color.

[0158] The light of the fourth color may have a fourth color wavelength included in the first wavelength band.

[0159] For example, the first wavelength band may be a visible light band.

[0160] For example, the first color wavelength may be a red wavelength, and the light of the first color may be red light. The second color wavelength may be a green wavelength, and the light of the second color may be green light. The third color wavelength may be a blue wavelength, and the light of the third color may be blue light. The fourth color wavelength may be a white wavelength, and the light of the fourth color may be white light. Hereinafter, for ease of explanation, a discussion is provided based on an example in which the light of the first color is red light, the light of the second color is green light, the light of the third color is blue light, and the light of the fourth color is white light.

[0161] Figure 6 An example plan view of a sub-pixel SP in an example in which a display panel 210 has a bottom emission structure according to aspects of the present disclosure is shown.

[0162] Reference Figure 6 As described above, each sub-pixel SP may include a light emitting element ED and a sub-pixel circuit SPC for controlling light emission of the light emitting element ED.

[0163] In an example in which the display panel 210 has a bottom emission structure, a corresponding light emitting element ED and a corresponding sub-pixel circuit SPC included in each sub-pixel SP may be configured not to overlap each other.

[0164] The light emitting area EA may be formed by the light emitting element ED. The area of ​​the light emitting element ED and the area of ​​the light emitting area EA may be the same or substantially the same.

[0165] A portion of the pixel electrode PE of the light emitting element ED may be located outside the emission area EA. The portion of the pixel electrode PE located outside the emission area EA may be a portion for connecting with the sub-pixel circuit SPC and may include a contact portion CNT connected to the sub-pixel circuit SPC.

[0166] Figure 7 is an example plan view of a display panel 210 having a bottom emission structure according to aspects of the present disclosure.

[0167] Reference Figure 7 In one or more aspects, the display panel 210 may include a plurality of sub-pixel array regions SPL. Each of the plurality of sub-pixel array regions SPL may include a plurality of sub-pixels SP.

[0168] In an example where the display panel 210 has a bottom emission structure, each of the plurality of sub-pixel array regions SPL may include a light emitting element array region EDA and a sub-pixel circuit array region SPCA.

[0169] The light emitting element array area EDA and the sub-pixel circuit array area SPCA may be configured not to overlap each other. The light emitting element array area EDA and the sub-pixel circuit array area SPCA may be disposed adjacent to each other in the second direction.

[0170] For example, a plurality of light emitting elements ED may be arranged in the light emitting element array area EDA along the second direction. A plurality of sub-pixel circuits SPC may be arranged in the sub-pixel circuit array area SPCA along the second direction.

[0171] The plurality of sub-pixels SP may include a plurality of first sub-pixels SP1 emitting light of a first color, a plurality of second sub-pixels SP2 emitting light of a second color, and a plurality of third sub-pixels SP3 emitting light of a third color.

[0172] As described above, in one or more aspects, for pen touch sensing, the pen 110 of the pen touch system 10 may emit light having a second wavelength included in a second wavelength band, and the light having the second wavelength emitted from the pen 110 may be incident on the display panel 210 of the display device 100. A portion of the light having the second wavelength incident on the display panel 210 may be absorbed at the inside of the display panel 210, and another portion of the light having the second wavelength may be reflected or converted into light having one or more other wavelengths at the inside of the display panel 210, and another portion of the light may be moved to the outside of the display panel 210 as redirected light in the form of the light having the second wavelength or the light having one or more other wavelengths.

[0173] Herein, the term "redirected light" may be reflected light or radiated light. The reflected light may be some light of the light having the second wavelength emitted from the pen 110 that is reflected at the inside of the display device 100 after being incident to the display device 100 and redirected to move to the outside of the display device 100. Of the light having the second wavelength emitted from the pen 110, the radiated light may be converted into light having one or more other wavelengths at the inside of the display device 100 after being incident to the display device 100, and radiated to move to the outside of the display device 100 in the form of light having one or more other wavelengths.

[0174] Therefore, at a certain point of the display panel 210, the redirected light (reflected light, radiated light) may be moved to the outside of the display panel 210, but at another point of the display panel 210, the light having the second wavelength may be absorbed and thus the redirected light may not be caused. 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 (reflected light and / or radiated light) from the display panel 210.

[0175] 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 the light having a second wavelength incident to the interior of the display panel 210 after being output from the pen 110 to be reflected or converted into light having one or more other wavelengths and radiated in the form of light having one or more other wavelengths, thereby causing redirected light (i.e., reflected light or radiated light) to be obtained from the display device 100.

[0176] In one or more aspects, the light control structure of the display panel 210 of the display device 100 may include two or more of the following: an absorption structure configured to absorb light having a second wavelength, a reflection structure configured to reflect light having the second wavelength, and a radiation structure configured to convert light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0177] The absorption structure may absorb light having a second wavelength included in the second wavelength band (eg, infrared light). The absorption structure absorbing light having the second wavelength may cause a chromaticity difference in the distribution of redirected light (reflected light and / or radiated light) received by the pen 110 .

[0178] 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).

[0179] 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 .

[0180] The radiation structure may convert the light having the second wavelength into light having one or more other wavelengths and radiate the light having the one or more other wavelengths. The radiation structure may cause a wavelength difference of the redirected light (radiated light) received by the pen 110 .

[0181] 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.

[0182] 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.

[0183] Figure 8 and Fig. 9 is an example cross-sectional view of a display panel 210 having a bottom emission structure according to aspects of the present disclosure.

[0184] Reference Figure 8 and Fig. 9, in one or more example embodiments, the display panel 210 of the display device 100 may include a first substrate 211 , a color filter layer CFL, and a photosensitive layer LRL.

[0185] Reference Figure 8 and Fig. 9 The color filter layer CFL may include a plurality of color filters CF. The plurality of color filters CF may transmit light having a first wavelength included in a first wavelength band.

[0186] Reference Figure 8 and Fig. 9 , the photosensitive layer LRL may respond to light having a second wavelength included in a second wavelength band different from the first wavelength band. For example, such a response to light having the second wavelength may include reflection, radiation, etc. In an example where reflection is taken as a response to light having the second wavelength, the photosensitive layer LRL may reflect light having the second wavelength. In an example where radiation is taken as a response to light having the second wavelength, the photosensitive layer LRL may convert light having the second wavelength into light having one or more other wavelengths, and radiate light having one or more other wavelengths.

[0187] Reference Figure 8 and Fig. 9 When light having the second wavelength or light having one or more other wavelengths comes out from the display device 100 , the pen 110 may receive the light having the second wavelength or light having one or more other wavelengths coming out from the display device 100 and output sensing data to the display device 100 .

[0188] Reference Figure 8 and Fig. 9 , the plurality of color filters CF may include a plurality of first color filters CF1 , a plurality of second color filters CF2 , and a plurality of third color filters CF3 .

[0189] The plurality of first color filters CF1 may be located in the color filter layer CFL and may transmit light of a first color having a first color wavelength included in a first wavelength band.

[0190] The plurality of second color filters CF2 may be located in the color filter layer CFL and may transmit light of a second color having a second color wavelength included in the first wavelength band.

[0191] The plurality of third color filters CF3 may be located in the color filter layer CFL and may transmit light of a third color having a third color wavelength included in the first wavelength band.

[0192] Reference Figure 8 and Fig. 9 , the photosensitive layer LRL may include two or more openings OP.

[0193] Reference Figure 8 and Fig. 9 , two or more openings OP of the photosensitive layer LRL may overlap with two or more color filters CF capable of transmitting light of a specific color. For example, two or more openings OP may overlap with two or more second color filters CF2 capable of transmitting light of a second color among a plurality of second color filters CF2. For example, the two or more second color filters CF2 may be green filters capable of transmitting green light. Hereinafter, for ease of explanation, a discussion is provided based on an example in which two or more openings OP formed in the photosensitive layer LRL overlap with two or more second color filters CF2 among a plurality of second color filters CF2.

[0194] Reference Figure 8 and Fig. 9 , light having a second wavelength incident on the display panel 210 may pass through two or more openings OP formed in the photosensitive layer LRL and reach two or more second color filters CF2. The light having the second wavelength reaching the two or more second color filters CF2 may be absorbed by the two or more second color filters CF2.

[0195] Reference Figure 8 and Fig. 9 , the gate insulating layer GI may be located on the first substrate 211. The protection layer PAS may be located on the gate insulating layer GI. The color filter layer CFL may be located on the protection layer PAS.

[0196] Reference Figure 8 and Fig. 9 The overcoat layer OC may be located on the color filter layer CFL. The light emitting element layer EDL may be located on the overcoat layer OC. The encapsulation layer ENCAP may be located on the light emitting element layer EDL.

[0197] Reference Figure 8 and Fig. 9 , the display panel 210 may include a code pattern layer CPL for pen touch sensing. The code pattern layer CPL may include a photosensitive layer LRL and at least one absorption pattern AP. In one or more aspects, the code pattern layer CPL may be a layer forming 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.

[0198] Reference Figure 8 and Fig. 9 , at least one insulating layer (PAS and / or GI) may be disposed between the photosensitive layer LRL included in the code pattern layer CPL and the absorption pattern AP.

[0199] The photosensitive layer LRL may be a reflective structure configured to reflect light having the second wavelength or a radiative structure configured to convert the light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0200] The at least one absorption pattern AP may be a structure configured to absorb light having the second wavelength.

[0201] In one or more aspects, the one or more absorption patterns AP included in the display panel 210 may be one or more of color filters of a specific color included in the color filter layer CFL. Here, the absorption pattern AP is not limited to the color filter.

[0202] For example, among the plurality of first color filters CF1, the plurality of second color filters CF2, and the plurality of third color filters CF3, one or more of the plurality of second color filters CF2 may be used as one or more absorption patterns AP. For example, the second color light transmitted through the plurality of second color filters CF2 may be green light.

[0203] Reference Figure 8 , the photosensitive layer LRL may be located under the first substrate 211. The protection layer PAS, the gate insulating layer GI, and the first substrate 211 may be disposed between the photosensitive layer LRL and the absorption pattern AP included in the code pattern layer CPL.

[0204] Reference Fig. 9 , the photosensitive layer LRL may be located on or over the first substrate 211. For example, the photosensitive layer LRL may be located between the first substrate 211 and the gate insulating layer GI. The protection layer PAS and the gate insulating layer GI may be disposed between the photosensitive layer LRL and the absorption pattern AP included in the code pattern layer CPL.

[0205] Fig.10 An example configuration of a code pattern in the display panel 210 according to aspects of the present disclosure is shown.

[0206] Reference Fig.10 The code pattern layer CPL 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.

[0207] 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.

[0208] The code pattern layer CPL may include: a plurality of data cell regions D-CELLs arranged in rows and columns; a plurality of first cell guide lines CGL1, each of the plurality of first cell guide lines CGL1 being disposed between adjacent data cell regions D-CELLs along a second direction; and a plurality of second cell guide lines CGL2, each of the plurality of second cell guide lines CGL2 being disposed between adjacent data cell regions D-CELLs along a first direction.

[0209] Reference Fig.10 , the plurality of code patterns CP may include: a plurality of first guide code patterns CP_CGL1 for representing each of the plurality of first unit guide lines CGL1; a plurality of second guide code patterns CP_CGL2 for representing each of the 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 the plurality of data cell regions D-CELL and arranged in rows and columns.

[0210] Reference Fig.10 , 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.

[0211] 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.

[0212] 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.

[0213] 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, at least one or more positions in which the plurality of data code patterns CP_CELL are respectively set may be slightly different.

[0214] 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).

[0215] 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.

[0216] Reference Fig.10 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] Pen (e.g. Figure 3A The pen 100) can identify multiple code patterns CP based on the redirected light, identify multiple first unit guide lines CGL1 and multiple second unit guide lines CGL2 based on the recognition result, and identify multiple data unit areas D-CELL divided by the multiple first unit guide lines CGL1 and the multiple second unit guide lines CGL2.

[0222] 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.

[0223] Reference Fig.10For example, when the pen 110 touches a position Pt centered on the first data cell area D-CELL1, the pen 110 can identify a corresponding setting position pattern of a plurality of data code patterns CP_CELL included in each of the first to fifth data cell areas (D-CELL1 to D-CELL5) based on a result obtained by sensing redirected light having a chromaticity difference or a wavelength difference, and calculate a more accurate touch position based on the first to fifth coordinates corresponding to the first to fifth data cell areas (D-CELL1 to D-CELL5) and the signal intensity difference of the redirected light.

[0224] Hereinafter, an example structure of the code pattern CP provided in the display panel 210 according to an exemplary embodiment of the present disclosure will be described in more detail.

[0225] Fig.11 An example scheme of setting a code pattern in the display panel 210 according to aspects of the present disclosure is shown.

[0226] Reference Fig.11 In one or more aspects, the code pattern layer CPL included in the display panel 210 may include a photosensitive layer LRL and one or more absorption patterns AP.

[0227] The photosensitive layer LRL may include a plurality of openings OP.

[0228] One or more openings OP provided in one data cell region D-CELL among the plurality of openings OP included in the photosensitive layer LRL may represent one coordinate data.

[0229] Each of the plurality of openings OP included in the photosensitive layer LRL may overlap with the corresponding absorption pattern AP in a vertical direction.

[0230] In one or more aspects, the absorption pattern AP included in the display device 100 may be a color filter CF capable of transmitting light having a specific color. For example, the absorption pattern AP may be a color filter CF capable of transmitting light of a color emitted from any one of the following sub-pixels: a first sub-pixel SP1 emitting light of a first color, a second sub-pixel SP2 emitting light of a second color, a third sub-pixel SP3 emitting light of a third color, and a fourth sub-pixel SP4 emitting light of a fourth color.

[0231] For example, the absorption pattern AP may be a second color filter CF2 capable of transmitting light of a second color. For example, the light of the second color may be green light.

[0232] Each of the plurality of openings OP included in the photosensitive layer LRL may overlap with a corresponding sub-pixel SP emitting light of a specific color.

[0233] Each of the plurality of openings OP included in the photosensitive layer LRL may overlap with a corresponding light emitting element ED emitting light of a specific color. That is, each of the plurality of openings OP included in the photosensitive layer LRL may overlap with a corresponding light emitting area EA through which light of a specific color is emitted.

[0234] For example, in the first subpixel SP1 emitting light of the first color, the second subpixel SP2 emitting light of the second color, the third subpixel SP3 emitting light of the third color, and the fourth subpixel SP4 emitting light of the fourth color, the plurality of openings OP included in the photosensitive layer LRL may overlap with the second subpixel SP2. Each of the plurality of openings OP included in the photosensitive layer LRL may overlap with a corresponding light emitting element ED emitting light of the second color and included in each second subpixel SP2. For example, each of the plurality of openings OP included in the photosensitive layer LRL may overlap with a corresponding light emitting area EA configured by a corresponding light emitting element ED included in each second subpixel SP2 and emitting light of the second color. For example, the light of the second color may be green light.

[0235] Fig.12 Example 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.

[0236] Reference Fig.12 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 light of a first color, a second color filter CF2 capable of transmitting light of a second color, and a third color filter CF3 capable of transmitting light of a third color.

[0237] Fig.12 The light transmission spectrum shows the corresponding light transmittance of the first color filter CF1, the second color filter CF2 and the third color filter CF3 in the visible light band WB_VL of about 380nm to 780nm and the infrared band WB_IL of about 780nm to 1080nm. Here, the visible light band may be the first band, and the infrared band may be the second band.

[0238] Reference Fig.12 The first color filter CF1 can transmit red light in the visible light band WB_VL, the second color filter CF2 can transmit green light in the visible light band WB_VL, and the third color filter CF3 can transmit blue light in the visible light band WB_VL.

[0239] Reference Fig.12, all of the first color filter CF1 , the second color filter CF2 , and the third color filter CF3 may transmit infrared light having a wavelength greater than a first specific wavelength λ1 in an infrared band WB_IL of about 780 nm to 1080 nm with high transmittance.

[0240] Reference Fig.12 , 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.

[0241] The second color filter CF2 has a high transmittance for infrared light of a second specific wavelength λ2 in an infrared band WB_IL having a wavelength greater than or equal to about 780 nm to 1080 nm, and has a low transmittance for infrared light in a wavelength band from 780 nm to the second specific wavelength λ2. Here, the second specific wavelength λ2 may be shorter than the first specific wavelength λ1.

[0242] The third color filter CF3 has a high transmittance for infrared light of a third specific wavelength λ3 in an infrared band WB_IL having a wavelength greater than or equal to about 780nm to 1080nm, and has a low transmittance for infrared light in a wavelength band from 780nm to the third specific wavelength λ3. Here, the third specific wavelength λ3 may be shorter than the second specific wavelength λ2.

[0243] For example, when the second color filter CF2 is used as an absorption pattern in the first to third color filters (CF1, CF2, and CF3), the light of the second wavelength for pen touch sensing may be included in a specific wavelength band greater than or equal to the third specific wavelength λ3 and less than or equal to the second specific wavelength λ2. For example, the specific wavelength band greater than or equal to the third specific wavelength λ3 and less than or equal to the second specific wavelength λ2 may be the second wavelength band described above.

[0244] In this implementation, the second color filter CF2 among the first to third color filters ( CF1 , CF2 , and CF3 ) may absorb light having the second wavelength, and the first and third color filters CF1 and CF3 may transmit light having the second wavelength.

[0245] For example, when the pen 110 is configured to output light having a second wavelength included in a specific wavelength band (λ3 to λ2), one or more of the plurality of second color filters CF2 may be used as an absorption pattern for forming one or more code patterns CP.

[0246] Since the second wavelength for pen touch sensing is set as described above, the display panel 210 can use one or more second color filters CF2 as an absorption pattern display for forming one or more code patterns CP even if the absorption pattern for forming one or more code patterns is not separately provided in the display panel 210. Therefore, the display panel 210 can have a more simplified structure.

[0247] Reference Fig.12 The second band can be a specific band greater than or equal to the third specific wavelength λ3 and less than or equal to the second specific wavelength λ2, and can be a band in which the transmittance of the multiple second color filters CF2 varies more than the transmittance of the multiple first color filters CF1 and the transmittance of the multiple third color filters CF3.

[0248] For example, Fig.12 As shown, the second color wavelength transmitted by the second color filter CF2 may be smaller than the first color wavelength transmitted by the first color filter CF1 and larger than the third color wavelength transmitted by the third color filter CF3.

[0249] Hereinafter, for convenience of explanation, a discussion will be provided based on an example in which one or more second color filters CF2 among the first to third color filters ( CF1 , CF2 , and CF3 ) are used to form one or more code patterns for pen touch sensing.

[0250] Fig.13 and 14 The display panel 210 according to various aspects of the present disclosure is Fig.11 An example cross-sectional view taken along line XX′. Fig.15 is an example plan view of a code pattern deposition structure in a display panel 210 having a bottom emission structure according to aspects of the present disclosure.

[0251] Reference Fig.13 and 14 In one or more aspects, the display panel 210 may include a first substrate 211, a color filter layer CFL provided with a second color filter CF2, and a photosensitive layer LRL.

[0252] Reference Fig.13 and Fig.14 The color filter layer CFL may include: a plurality of first color filters CF1 capable of transmitting light of a first color having a first color wavelength included in a first band; a plurality of second color filters CF2 capable of transmitting light of a second color having a second color wavelength included in the first band; and a plurality of third color filters CF3 capable of transmitting light of a third color having a third color wavelength included in the first band.

[0253] Reference Fig.13 , Fig.14 and Fig.15 , the photosensitive layer LRL may be disposed in the entirety or at least a portion of the display area DA of the display panel 210 , and may include two or more openings OP.

[0254] The photosensitive layer LRL may respond to light having a second wavelength included in a second wavelength band different from the first wavelength band. Here, the response of the photosensitive layer LRL to the light having the second wavelength may mean that the photosensitive layer LRL reflects the light having the second wavelength, or converts the light having the second wavelength into light having one or more other wavelengths and radiates light having one or more other wavelengths. Therefore, the photosensitive layer LRL may have a reflective structure or a radiative structure for light having the second wavelength.

[0255] Reference Fig.13 , Fig.14 and Fig.15 In one or more aspects, two or more openings OP included in the photosensitive layer LRL may overlap with two or more second color filters CF2 of the plurality of second color filters CF2. Therefore, two or more second color filters CF2 of the plurality of second color filters CF2 may overlap with two or more openings OP included in the photosensitive layer LRL.

[0256] The whole or part of each of the two or more openings OP included in the photosensitive layer LRL may overlap the whole or part of the corresponding second color filter CF2 among the two or more second color filters CF2.

[0257] Reference Fig.13 , Fig.14 and Fig.15 In one or more aspects, the two or more openings OP included in the photosensitive layer LRL may not overlap with the plurality of first color filters CF1 and the plurality of third color filters CF3.

[0258] In the example of wavelength setting as described above, that is, the second wavelength of the light emitted from the pen 110 is included in a specific wavelength band (e.g., the second wavelength band), each of the plurality of second color filters CF2 can absorb the light having the second wavelength. For example, each of the plurality of second color filters CF2 can have an absorption characteristic capable of absorbing the light having the second wavelength, and one or more of the plurality of second color filters CF2 can be used as an absorption pattern for forming one or more code patterns based on the absorption characteristic.

[0259] In the aforementioned wavelength setting in which the second wavelength of the light emitted from the pen 110 is included in a specific wavelength band (eg, the second wavelength band), each of the plurality of first color filters CF1 and the plurality of third color filters CF3 may transmit the light having the second wavelength.

[0260] As described above, for example, the photosensitive layer LRL may reflect light having the second wavelength. In another example, the photosensitive layer LRL may convert light having the second wavelength into light having one or more other wavelengths and radiate light having the one or more other wavelengths.

[0261] The photosensitive layer LRL can transmit light of a wavelength included in the first wavelength band (e.g., visible light wavelength band). Therefore, even when the photosensitive layer LRL is located in a path through which visible light (red light, green light, blue light) emitted from the light emitting element layer EDL moves toward the back side of the first substrate 211, the visible light (red light, green light, blue light) can generally come out of the display panel 210. When this configuration is applied, image display can be performed normally.

[0262] Reference Fig.13 , Fig.14 and Fig.15 , a portion of the light having the second wavelength incident to the inside of the display device 100 after being output from the pen 110 may pass through the two or more openings OP and be absorbed by the two or more second color filters CF2 overlapping the two or more openings OP.

[0263] Reference Fig.13 , Fig.14 and Fig.15 , another part of the light with the second wavelength that is incident on the inside of the display device 100 after being output from the pen 110 can be reflected or converted by the photosensitive layer LRL into light with one or more other wavelengths, and moved to the outside of the display device 100 in the form of light with the second wavelength or light with one or more other wavelengths.

[0264] Reference Fig.13 and Fig.14 The display panel 210 may include a gate insulating layer GI on the first substrate 211 , a protection layer PAS on the gate insulating layer GI, a capping layer OC on the protection layer PAS, and a light emitting element layer EDL on the capping layer OC.

[0265] Reference Fig.13 and Fig.14 , the color filter layer CFL may be located between the protection layer PAS and the cover layer OC.

[0266] Reference Fig.13 , the photosensitive layer LRL may be located under the first substrate 211. For example, the photosensitive layer LRL may be located on the back side of the first substrate 211.

[0267] Reference Fig.14, the photosensitive layer LRL may be located on or over the first substrate 211. For example, the photosensitive layer LRL may be located between the first substrate 211 and the gate insulating layer GI.

[0268] Reference Fig.15 The display area DA of the display panel 210 may include: a plurality of first sub-pixels SP1 emitting light of a first color, a plurality of second sub-pixels SP2 emitting light of a second color, a plurality of third sub-pixels SP3 emitting light of a third color, and a plurality of fourth sub-pixels SP4 emitting light of a fourth color.

[0269] Reference Fig.15 , the first color light may be red light, the second color light may be green light, the third color light may be blue light, and the fourth color light may be white light.

[0270] Therefore, each of the multiple first sub-pixels SP1 may include a red light-emitting area R that emits red light, each of the multiple second sub-pixels SP2 may include a green light-emitting area G that emits green light, each of the multiple third sub-pixels SP3 may include a blue light-emitting area B that emits blue light, and each of the multiple fourth sub-pixels SP4 may include a white light-emitting area W that emits white light.

[0271] For example, each light emitting element disposed in the red light emitting region R, the green light emitting region G, the blue light emitting region B, and the white light emitting region W may be a white light emitting element that emits white light. Fig.13 , Fig.14 and Fig.15 , a first color filter CF1 capable of transmitting red light may be provided in the red light emitting region R, a second color filter CF2 capable of transmitting green light may be provided in the green light emitting region G, and a third color filter CF3 capable of transmitting red light may be provided in the blue light emitting region B. No color filter may be provided in the white light emitting region W.

[0272] In an example where the display panel 210 has a bottom emission structure, each of the plurality of first color filters CF1, the plurality of second color filters CF2, and the plurality of third color filters CF3 may not overlap with a transistor disposed in the transistor layer. In another example where the display panel 210 has a top emission structure, each of the plurality of first color filters CF1, the plurality of second color filters CF2, and the plurality of third color filters CF3 may overlap with a transistor disposed in the transistor layer.

[0273] Reference Fig.15 and Fig.10 , and in Fig.15At least some of the second color filters CF2 overlapped with the openings OP formed in the photosensitive layer LRL shown in FIG. 1 may correspond to the code pattern CP_CELL set in two or more data cell regions D-CELL, to the code pattern CP_CELL set in one data cell region D-CELL, or to the code pattern CP_CELL set in a portion of one data cell region D-CELL.

[0274] In addition, Fig.15 Some of the second color filters CF2 overlapped by the openings OP formed in the photosensitive layer LRL shown in FIG. 4 may correspond to the code patterns (CP_CGL1, CP_CGL2) corresponding to the first and second cell guide lines (CGL1, CGL2) around the data cell region D-CELL.

[0275] Fig.16 is along Fig.15 An example cross-sectional view taken along line AA′ of the display panel 210 is shown. Fig.17 is along Fig.15 An example cross-sectional view taken along line BB′ of the display panel 210 is shown.

[0276] Reference Fig.16 and Fig.17 In one or more aspects, the display panel 210 may include a first substrate 211, a transistor layer TFTL located on the first substrate 211, a light emitting element layer EDL located above the transistor layer TFTL, an adhesive layer 1610 located on the light emitting element layer EDL, and a second substrate 1620 located on the adhesive layer 1610.

[0277] Reference Fig.16 and Fig.17 The transistor layer TFTL may include a metal layer and an insulating layer for forming a transistor such as a driving transistor DRT.

[0278] A second electrode E2, i.e., a gate electrode E2, may be disposed on the first substrate 211, a gate insulating layer GI may be disposed on the gate electrode E2, and an active layer ACT may be disposed on the gate insulating layer GI. The first electrode and the third electrode (E1 and E3) may be disposed in two opposite portions of the active layer ACT, respectively. For example, the first electrode E1 may be a source electrode or a drain electrode of the driving transistor DRT, the second electrode E2 may be a gate electrode of the driving transistor DRT, and the third electrode E3 may be a drain electrode or a source electrode of the driving transistor DRT.

[0279] Reference Fig.16 and Fig.17, a protective layer PAS may be disposed on transistors such as a driving transistor DRT, etc. A color filter layer CFL may be disposed on the protective layer PAS, and one or more second color filters CF2 may be disposed in the color filter layer CFL. An overcoat layer OC may be disposed on the second color filter CF2.

[0280] Reference Fig.16 and Fig.17 , a pixel electrode PE may be disposed on the coating layer OC. A bank BK may be disposed on the pixel electrode PE. The bank BK may include an opening overlapping a portion of the pixel electrode PE. An element intermediate layer EL may be disposed on the bank BK. The element intermediate layer EL may be disposed on a portion of the pixel electrode PE overlapping the opening of the bank BK, on ​​at least one side surface of the bank BK, and on a top of the bank BK. A common electrode CE may be disposed on the element intermediate layer EL.

[0281] Reference Fig.16 and Fig.17 The light emitting element ED may be configured by a stacked configuration in which the pixel electrode PE, the element intermediate layer EL, and the common electrode CE overlap each other. The region in which the light emitting element ED is configured may form a corresponding light emitting region EA.

[0282] Reference Fig.16 and Fig.17 , the adhesive layer 1610 may be disposed on the common electrode CE, and the second substrate 1620 may be disposed on the adhesive layer 1610. The second substrate 1620 may be an encapsulation substrate serving as an encapsulation layer ENCAP.

[0283] Reference Fig.16 and Fig.17 In an example where the display panel 210 has a bottom emission structure, the color filter layer CFL may be located between the first substrate 211 and the light emitting element layer EDL.

[0284] The second color filter CF2 disposed in the color filter layer CFL may overlap the light emitting element ED and may be disposed in the light emitting area EA.

[0285] For the bottom emission structure of the display panel 210 , the second color filter CF2 disposed in the color filter layer CFL may not overlap with the transistor disposed in the transistor layer TFTL.

[0286] Reference Fig.16 and Fig.17 The photosensitive layer LRL may be located under the color filter layer CFL, and, for example, may be located on a back substrate of the first substrate 211 .

[0287] Reference Fig.15 and Fig.16 ,Depend on Fig.15The green light emitting region G indicated by the line AA′ in FIG. 5 may be a region where the opening OP of the photosensitive layer LRL exists and the second color filter CF2 is disposed to overlap with the opening OP of the photosensitive layer LRL.

[0288] Reference Fig.15 and Fig.17 ,Depend on Fig.15 The green light emitting region G indicated by the line BB′ in FIG. 5 may be a region where the second color filter CF2 is disposed and the opening OP of the photosensitive layer LRL does not exist.

[0289] Reference Fig.16 and Fig.17 , at the opening OP of the photosensitive layer LRL, since the second color filter CF2 absorbs the light having the second wavelength, reflected light or radiated light in response to the light having the second wavelength is not caused, and therefore, there is no redirected light from the display panel 210. On the contrary, at a portion of the photosensitive layer LRL where the opening OP does not exist, redirected light (reflected light or radiated light) in response to the light having the second wavelength may be caused to move to the outside of the display panel 210.

[0290] Therefore, due to the opening OP of the photosensitive layer LRL, the pen 110 may recognize the corresponding one or more code patterns CP through the back surface of the display panel 210 based on the chromaticity difference of the received redirected light (reflected light or radiated light).

[0291] Fig.18 is along Fig.15 An example cross-sectional view taken along line AA′ of the display panel 210 is shown. Fig.19 is along Fig.15 An example cross-sectional view taken along line BB′ in the display panel 210 is shown.

[0292] In addition to the vertical position corresponding to the photosensitive layer LRL, Fig.18 and Fig.19 The cross-sectional configuration can be Fig.16 and Fig.17 The configuration of the cross-sectional view is the same. Fig.18 The configuration can correspond to Fig.16 configuration, and Fig.19 The configuration can correspond to Fig.17 Considering this similarity, we will focus on Fig.16 and Fig.17 The configuration of different features provides Fig.18 and Fig.19 Discussion of configuration.

[0293] Reference Fig.18 and Fig.19, the photosensitive layer LRL may be located between the driving transistor DRT disposed in the transistor layer TFTL and the first substrate 211 .

[0294] As described above, a discussion of an example in which a code pattern deposition structure is applied to a display panel 210 having a bottom emission structure has been provided. Hereinafter, a discussion is briefly provided on an example in which a code pattern deposition structure is applied to a display panel 210 having a top emission structure. In the following description, a discussion of a code pattern deposition structure applied to a display panel 210 having a top emission structure according to an example embodiment of the present disclosure is provided by focusing on features different from the configuration of the display panel 210 having a bottom emission structure.

[0295] Fig. 20 An example plan view of a sub-pixel in an example in which a display panel has a top emission structure according to aspects of the present disclosure is shown.

[0296] Reference Fig. 20 , each sub-pixel SP may include a light emitting element ED and a sub-pixel circuit SPC for controlling light emission of the light emitting element ED.

[0297] In an example where the display panel 210 has a top emission structure, a corresponding light emitting element ED and a corresponding sub-pixel circuit SPC included in each sub-pixel SP may overlap each other. Therefore, the display panel 210 having a top emission structure may have a high aperture ratio.

[0298] Fig.21 is an example plan view of a display panel 210 having a top emission structure according to aspects of the present disclosure.

[0299] Reference Fig.21 In one or more aspects, the display panel 210 may include a plurality of sub-pixel array regions SPL. Each of the plurality of sub-pixel array regions SPL may include a plurality of sub-pixels SP.

[0300] For example, each of the plurality of sub-pixel array regions SPL may be disposed adjacent to each other in a first direction. The plurality of sub-pixels SP included in each of the plurality of sub-pixel array regions SPL may be disposed adjacent to each other in a second direction. For example, the first direction may be a column direction, and the second direction may be a row direction. In another example, the first direction may be a row direction, and the second direction may be a column direction. Hereinafter, for ease of explanation only, 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.

[0301] The plurality of sub-pixels SP may include a plurality of first sub-pixels SP1 emitting light of a first color, a plurality of second sub-pixels SP2 emitting light of a second color, and a plurality of third sub-pixels SP3 emitting light of a third color.

[0302] The first color light may have a first color wavelength included in a first wavelength band.

[0303] The second color light may have a second color wavelength included in the first wavelength band.

[0304] The light of the third color may have a third color wavelength included in the first wavelength band.

[0305] The plurality of sub-pixels SP may further include a plurality of fourth sub-pixels SP4 emitting light of a fourth color.

[0306] The light of the fourth color may have a fourth color wavelength included in the first wavelength band.

[0307] For example, the first wavelength band may be a visible light band.

[0308] For example, the first color wavelength may be a red wavelength, and the light of the first color may be red light. The second color wavelength may be a green wavelength, and the light of the second color may be green light. The third color wavelength may be a blue wavelength, and the light of the third color may be blue light. The fourth color wavelength may be a white wavelength, and the light of the fourth color may be white light. Hereinafter, for ease of explanation, a discussion is provided based on an example in which the light of the first color is red light, the light of the second color is green light, the light of the third color is blue light, and the light of the fourth color is white light.

[0309] In an example where the display panel 210 has a top emission structure, each of the multiple sub-pixel array areas SPL may include a light emitting element array area EDA and a sub-pixel circuit array area SPCA, which overlap each other in the vertical direction.

[0310] Fig. 22 An example cross-sectional view of a display panel 210 having a top transmissive structure according to aspects of the present disclosure is shown.

[0311] Reference Fig. 22 In one or more aspects, the display panel 210 of the display device 100 may include a first substrate 211, a transistor layer TFTL located on the first substrate 211, a light emitting element layer EDL located on the transistor layer TFTL, an encapsulation layer ENCAP located on the light emitting element layer EDL, a color filter layer CFL located on the encapsulation layer ENCAP, and a photosensitive layer LRL disposed on the color filter layer CFL.

[0312] Reference Fig. 22 The color filter layer CFL may include a plurality of color filters CF. The plurality of color filters CF may transmit light having a first wavelength included in a first wavelength band.

[0313] Reference Fig. 22 , the photosensitive layer LRL may respond to light having a second wavelength included in a second wavelength band different from the first wavelength band. For example, such a response to the light having the second wavelength may include reflection, radiation, etc. In an example of reflection as a response to the light having the second wavelength, the photosensitive layer LRL may reflect the light having the second wavelength. In an example of radiation as a response to the light having the second wavelength, the photosensitive layer LRL may convert the light having the second wavelength into light having one or more other wavelengths and radiate light having one or more other wavelengths.

[0314] Reference Fig. 22 Since the light having the second wavelength or the light having one or more other wavelengths comes out from the display device 100 , the pen 110 can receive the light having the second wavelength or the light having one or more other wavelengths coming out from the display device 100 and output sensing data to the display device 100 .

[0315] Reference Fig. 22 , the plurality of color filters CF may include a plurality of first color filters CF1 , a plurality of second color filters CF2 , and a plurality of third color filters CF3 .

[0316] The plurality of first color filters CF1 may be located in the color filter layer CFL and may transmit first color light having a first color wavelength included in a first wavelength band.

[0317] The plurality of second color filters CF2 may be located in the color filter layer CFL and may transmit second color light having a second color wavelength included in the first wavelength.

[0318] The plurality of third color filters CF3 may be located in the color filter layer CFL and may transmit third color light having a third color wavelength included in the first wavelength band.

[0319] Reference Fig. 22 , the photosensitive layer LRL may include two or more openings OP.

[0320] Reference Fig. 22, two or more openings OP of the photosensitive layer LRL may overlap with two or more color filters CF capable of transmitting light of a specific color. For example, two or more openings OP may overlap with two or more second color filters CF2 capable of transmitting second color light among a plurality of second color filters CF2. For example, the two or more second color filters CF2 may be green filters capable of transmitting green light. Hereinafter, for ease of explanation, discussion will be based on an example in which two or more openings OP formed in the photosensitive layer LRL overlap with two or more second color filters CF2 among a plurality of second color filters CF2.

[0321] Reference Fig. 22 , light having a second wavelength incident on the display panel 210 may pass through two or more openings OP formed in the photosensitive layer LRL and reach two or more second color filters CF2. The light having the second wavelength reaching the two or more second color filters CF2 may be absorbed by the two or more second color filters CF2.

[0322] Reference Fig. 22 , the display panel 210 having a top transmissive structure may include a code pattern layer CPL for pen touch sensing. The code pattern layer CPL may include a photosensitive layer LRL and one or more absorption patterns AP.

[0323] Reference Fig. 22 , at least one insulating layer INS may be disposed between the photosensitive layer LRL and the absorption pattern AP included in the code pattern layer CPL.

[0324] The photosensitive layer LRL may be a reflective structure configured to reflect light having the second wavelength, or a radiative structure configured to convert the light having the second wavelength into light having one or more other wavelengths and radiate light having the one or more other wavelengths.

[0325] The absorption pattern AP may be a structure configured to absorb light having the second wavelength.

[0326] In one or more aspects, the one or more absorption patterns AP included in the display panel 210 may be one or more of color filters of a specific color included in the color filter layer CFL.

[0327] For example, among the plurality of first color filters CF1, the plurality of second color filters CF2, and the plurality of third color filters CF3, one or more of the plurality of second color filters CF2 may serve as one or more absorption patterns AP. For example, the second color light transmitted by the plurality of second color filters CF2 may be green light.

[0328] Reference Fig. 22, the photosensitive layer LRL may be disposed over the color filter layer CFL. The insulating layer INS may be disposed between the photosensitive layer LRL and the absorption pattern AP included in the code pattern layer CPL.

[0329] Reference Fig. 22 , a cover window (eg, cover glass) may be provided on the photosensitive layer LRL.

[0330] Fig.23 is an example plan view of a code pattern deposition structure in a display panel having a top transmission structure according to aspects of the present disclosure. Fig.24 is along Fig.23 An example cross-sectional view taken along line AA' in a display panel of FIG. Fig.25 is along Fig.23 An example cross-sectional view taken along line BB' in a display panel of FIG.

[0331] In addition to the vertical alignment of the light emitting element array area EDA and the sub-pixel circuit array area SPCA, Fig.23 The configuration can be Fig.15 The configuration is the same.

[0332] Reference Fig.24 and Fig.25 The display panel 210 having a top transmission structure may include a first substrate 211, a transistor layer TFTL located on the first substrate 211, a light emitting element layer EDL located on the transistor layer TFTL, and an encapsulation layer ENCAP located on the light emitting element layer EDL.

[0333] Reference Fig.24 and Fig.25 The transistor layer TFTL may include a metal layer and an insulating layer for forming a transistor such as a driving transistor DRT.

[0334] The second electrode E2 as the gate electrode E2 may be disposed on the first substrate 211, the gate insulating layer GI may be disposed on the gate electrode E2, and the active layer ACT may be disposed on the gate insulating layer GI. The first electrode and the third electrode (E1 and E3) may be disposed in two opposite portions of the active layer ACT, respectively. For example, the first electrode E1 may be a source electrode or a drain electrode of the driving transistor DRT, the second electrode E2 may be a gate electrode of the driving transistor DRT, and the third electrode E3 may be a drain electrode or a source electrode of the driving transistor DRT.

[0335] Reference Fig.24 and Fig.25 , the protection layer PAS may be disposed on the transistor such as the driving transistor DRT, and the overcoat layer OC as a planarization layer may be disposed on the protection layer PAS.

[0336] Reference Fig.24 and Fig.25 , the pixel electrode PE may be disposed on the coating layer OC. The bank BK may be disposed on the pixel electrode PE. The bank BK may include an opening overlapping a portion of the pixel electrode PE. The element intermediate layer EL may be disposed on the bank BK. The element intermediate layer EL may be disposed on a portion of the pixel electrode PE overlapping the opening of the bank BK, on ​​at least one side surface of the bank BK, and on the top of the bank BK. The common electrode CE may be disposed on the element intermediate layer EL.

[0337] Reference Fig.24 and Fig.25 The light emitting element ED may be configured by a stacked configuration in which the pixel electrode PE, the element intermediate layer EL, and the common electrode CE overlap each other. The region in which the light emitting element ED is configured may form a corresponding light emitting region EA.

[0338] Reference Fig.24 and Fig.25 , the encapsulation layer ENCAP may be disposed on the common electrode CE. The encapsulation layer ENCAP may include one or more inorganic layers and one or more organic layers. For example, the encapsulation layer ENCAP may have a structure in which an inorganic layer, an organic layer, and an inorganic layer are stacked.

[0339] Reference Fig.24 and Fig.25 The color filter layer CFL in which the second color filter CF2 is disposed may be located on the encapsulation layer ENCAP. The insulating layer INS may be disposed on the second color filter CF2, and the photosensitive layer LRL may be disposed on the insulating layer INS.

[0340] Reference Fig.24 and Fig.25 , the second color filter CF2 may overlap the light emitting element ED and may be disposed in the light emitting area EA.

[0341] Since the display panel 210 has a top transmissive structure, the second color filter CF2 may be configured to overlap one or more transistors provided in the transistor layer TFTL.

[0342] Reference Fig.23 and Fig.24 , Fig.23 The green light emitting region G indicated by the line AA′ in FIG. 5 may be a region where the opening OP of the photosensitive layer LRL exists and the second color filter CF2 is disposed to overlap with the opening OP of the photosensitive layer LRL.

[0343] Reference Fig.23 and Fig.25 , Fig.23The green light emitting region G indicated by the line BB′ in FIG. 5 may be a region where the second color filter CF2 is disposed and the opening OP of the photosensitive layer LRL does not exist.

[0344] Reference Fig.24 and Fig.25 , at the opening OP of the photosensitive layer LRL, since the second color filter CF2 absorbs the light having the second wavelength, reflected light or radiated light in response to the light having the second wavelength is not caused, and therefore, there is no redirected light from the display panel 210. On the contrary, at a portion where the opening OP of the photosensitive layer LRL does not exist, the redirected light (reflected light or radiated light) in response to the light having the second wavelength may be caused to move to the outside of the display panel 210.

[0345] Therefore, due to the opening OP of the photosensitive layer LRL, the pen 110 may recognize the corresponding one or more code patterns CP through the front surface of the display panel 210 based on the chromaticity difference of the received redirected light (reflected light or radiated light).

[0346] Reference Fig.23 and Fig.10 , the second color filter CF2 and Fig.23 At least some of the second color filters CF2 overlapped by the openings OP formed in the photosensitive layer LRL shown may correspond to a code pattern CP_CELL disposed in two or more data cell regions D-CELL, to a code pattern CP_CELL disposed in one data cell region D-CELL, or to a code pattern CP_CELL disposed in a portion of one data cell region D-CELL.

[0347] In addition, the second color filter CF2 Fig.23 Some of the second color filters CF2 overlapped by the openings OP formed in the photosensitive layer LRL as shown may correspond to the code patterns (CP_CGL1, CP_CGL2) corresponding to the first and second cell guide lines (CGL1, CGL2) surrounding the data cell region D-CELL.

[0348] The above-mentioned exemplary embodiments will be briefly described as follows.

[0349] According to an example embodiment of the present disclosure, a display device may be provided, the display device comprising: a first substrate; a plurality of first color filters, the plurality of first color filters being included in a color filter layer and transmitting a first color light having a first color wavelength included in a first band; a plurality of second color filters, the plurality of second color filters being included in the color filter layer and transmitting a second color light having a second color wavelength included in the first band; a plurality of third color filters, the plurality of third color filters being included in the color filter layer and transmitting a third color light having a third color wavelength included in the first band; and a photosensitive layer, the photosensitive layer being responsive to light having a second wavelength included in a second band different from the first band and comprising two or more openings.

[0350] In one or more aspects, two or more openings may overlap with two or more second color filters of the plurality of second color filters.

[0351] In one or more aspects, the two or more openings may not overlap with the plurality of first color filters and the plurality of third color filters.

[0352] In one or more aspects, each of the plurality of second color filters can absorb light having a second wavelength.

[0353] In one or more aspects, each of the plurality of first color filters and the plurality of third color filters may transmit light having the second wavelength.

[0354] In one or more aspects, the photosensitive layer can reflect 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.

[0355] In one or more aspects, the photosensitive layer can transmit light having a wavelength included in the first wavelength band.

[0356] In one or more aspects, the second wavelength band may be a wavelength band in which a variation in transmittance of the plurality of second color filters is greater than a transmittance of the plurality of first color filters and a transmittance of the plurality of third color filters.

[0357] In one or more aspects, the second color wavelength can be shorter than the first color wavelength and longer than the third color wavelength.

[0358] In one or more aspects, the display may further include a transistor layer on the first substrate and a light emitting element layer on the transistor layer.

[0359] In one or more aspects, a color filter layer may be located between the first substrate and the light emitting element layer.

[0360] In one or more aspects, each of the plurality of first color filters, the plurality of second color filters, and the plurality of third color filters may not overlap with a transistor disposed in the transistor layer.

[0361] In one or more aspects, a photosensitive layer can be located below the color filter layer.

[0362] In one or more aspects, the photosensitive layer can be located below the first substrate.

[0363] In one or more aspects, the photosensitive layer can be located between the transistors disposed in the transistor layer and the first substrate.

[0364] In one or more aspects, the display may further include a transistor layer on the first substrate, a light emitting element layer on the transistor layer, and an encapsulation layer on the light emitting element layer.

[0365] In one or more aspects, a color filter layer can be located on the encapsulation layer.

[0366] In one or more aspects, a photosensitive layer can be located on the color filter layer.

[0367] In one or more aspects, a portion of the light having the second wavelength that is incident on the interior of the display device may pass through two or more openings and be absorbed by two or more second color filters that overlap the two or more openings, and another portion of the light having the second wavelength that is incident on the interior of the display device may be reflected by the photosensitive layer or converted into light having one or more other wavelengths and cause another portion of the light to move to the outside of the display device.

[0368] According to an example embodiment 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 including: a first substrate; a plurality of color filters, the plurality of color filters transmitting light having a first wavelength included in a first band; and a photosensitive layer, the photosensitive layer responding to light having a second wavelength included in a second band different from the first band, the pen being configured to output the light having the second wavelength to the display device; receiving redirected light generated from the display device; and outputting sensing data to the display device based on the redirected light.

[0369] In one or more aspects, the plurality of color filters may include: a plurality of first color filters, the plurality of first color filters being located in a color filter layer and transmitting a first color light having a first color wavelength included in a first band; a plurality of second color filters, the plurality of second color filters being located in the color filter layer and transmitting a second color light having a second color wavelength included in the first band; and a plurality of third color filters, the plurality of third color filters being located in the color filter layer and transmitting a third color light having a third color wavelength included in the first band.

[0370] In one or more aspects, the photosensitive layer can include two or more openings.

[0371] In one or more aspects, two or more openings may overlap with two or more second color filters of the plurality of second color filters.

[0372] In one or more aspects, each of the plurality of second color filters can absorb light having a second wavelength.

[0373] In one or more aspects, each of the plurality of first color filters and the plurality of third color filters may transmit light having the second wavelength.

[0374] In one or more aspects, the photosensitive layer can reflect 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.

[0375] In one or more aspects, the photosensitive layer can transmit light having a wavelength included in the first wavelength band.

[0376] According to one or more aspects described herein, a display device and a pen touch system capable of more accurately sensing a pen touch based on optical technology may be provided.

[0377] According to one or more aspects described herein, a display device and a pen touch system capable of sensing a pen touch based on an optical technology by using one or more color filters included in a display panel may be provided.

[0378] According to one or more 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.

[0379] According to one or more 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 is integrated, the light control structure being configured to enable pen touch sensing without affecting light emitting performance for image display.

[0380] According to one or more aspects described herein, a display device and a pen touch system may be provided, which include a display panel integrated with a light control structure configured to allow a pen to sense touch, and thereby provide the advantages of reducing the thickness of the display device and helping to simplify the assembly process of the display device. Therefore, one or more aspects described herein help reduce weight and optimize the process of the display device. The above-mentioned example embodiments of the present disclosure are described for illustrative purposes; those skilled in the art will understand 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 understand that various modifications and applications are possible without departing from the essential features of the present disclosure. For example, various modifications may be made to specific components of the exemplary embodiments.

Claims

1. A display device, comprising: a first substrate; a plurality of first color filters included in the color filter layer, the plurality of first color filters configured to transmit first color light having a first color wavelength included in a first wavelength band; a plurality of second color filters included in the color filter layer, the plurality of second color filters being configured to transmit second color light having a second color wavelength included in the first wavelength band; a plurality of third color filters included in the color filter layer, the plurality of third color filters being configured to transmit third color light having a third color wavelength included in the first wavelength band; as well as A photosensitive layer is responsive to light having a second wavelength included in a second wavelength band different from the first wavelength band, the photosensitive layer including two or more openings overlapping two or more second color filters of the plurality of second color filters.

2. The display device according to claim 1, wherein: The two or more openings do not overlap with the plurality of first color filters and the plurality of third color filters.

3. The display device according to claim 1, wherein: Each of the plurality of second color filters absorbs light having the second wavelength, and Wherein, each of the plurality of first color filters and the plurality of third color filters transmits light having the second wavelength.

4. The display device according to claim 1 , wherein: The photosensitive layer is configured as follows: reflects light having said second wavelength, or The light having the second wavelength is converted into light having one or more other wavelengths, and the light having the one or more other wavelengths is radiated.

5. The display device according to claim 1, wherein: The photosensitive layer transmits light having a wavelength included in the first wavelength band.

6. The display device according to claim 1, wherein: The second wavelength band is a wavelength band in which the transmittance of the plurality of second color filters varies more than the transmittance of the plurality of first color filters and the transmittance of the plurality of third color filters.

7. The display device according to claim 1, wherein: The second color wavelength is shorter than the first color wavelength and longer than the third color wavelength.

8. The display device according to one of claims 1 to 3, further comprising: a transistor layer located on the first substrate; a light emitting element layer located on the transistor layer, Wherein, the color filter layer is located between the first substrate and the light emitting element layer, wherein each of the plurality of first color filters, the plurality of second color filters, and the plurality of third color filters does not overlap with a transistor disposed in the transistor layer, and Wherein, the photosensitive layer is located below the color filter layer.

9. The display device according to claim 8, wherein: The photosensitive layer is located below the first substrate, or The photosensitive layer is located between the transistors disposed in the transistor layer and the first substrate.

10. The display device according to one of claims 1 to 3, further comprising: a transistor layer located on the first substrate; a light emitting element layer located on the transistor layer; as well as an encapsulation layer located on the light emitting element layer, The color filter layer is located on the encapsulation layer, and the photosensitive layer is located on the color filter layer.

11. The display device according to claim 10, wherein: Each of the plurality of first color filters, the plurality of second color filters, and the plurality of third color filters is configured to overlap a transistor disposed in the transistor layer.

12. The display device according to claim 1, wherein: A portion of the light with the second wavelength that is incident on the interior of the display device passes through the two or more openings and is absorbed by the two or more second color filters overlapping the two or more openings, and another portion of the light with the second wavelength that is incident on the interior of the display device is reflected or converted into light with one or more other wavelengths by the photosensitive layer and is moved to the outside of the display device.

13. A pen touch system, comprising: A display device comprising: a first substrate; a plurality of color filters transmitting light having a first wavelength included in a first wavelength band; and a photosensitive layer responsive to light having a second wavelength included in a second wavelength band different from the first wavelength band; 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 plurality of color filters include: a plurality of first color filters in the color filter layer, the plurality of first color filters configured to transmit first color light having a first color wavelength included in a first wavelength band; a plurality of second color filters in the color filter layer, the plurality of second color filters configured to transmit second color light having a second color wavelength included in the first wavelength band; a plurality of third color filters in the color filter layer, the plurality of third color filters being configured to transmit third color light having a third color wavelength included in the first wavelength band, and The photosensitive layer includes two or more openings, and the two or more openings overlap with two or more second color filters among the plurality of second color filters.

14. The pen touch system according to claim 13, wherein: Each of the plurality of second color filters absorbs light having the second wavelength, and Wherein, each of the plurality of first color filters and the plurality of third color filters transmits light having the second wavelength.

15. The pen touch system according to one of claims 13 to 14, wherein: The photosensitive layer is configured as follows: reflects light having said second wavelength, or The light having the second wavelength is converted into light having one or more other wavelengths, and the light having the one or more other wavelengths is radiated.

16. The pen touch system according to one of claims 13 to 14, wherein: The photosensitive layer transmits light having a wavelength included in the first wavelength band.

17. A pen touch system comprising: A display device, the display device comprising a first substrate; a plurality of sub-pixels and a code pattern layer for pen touch sensing, wherein the code pattern layer includes a photosensitive layer and at least one absorption pattern, The plurality of sub-pixels include: a plurality of first sub-pixels emitting first color light of a first color wavelength included in a first band; a plurality of second sub-pixels emitting second color light of a second color wavelength included in the first band; and a plurality of third sub-pixels emitting third color light of a third color wavelength included in the first band, and the photosensitive layer is responsive to light having a second wavelength included in a second wavelength band different from the first wavelength band and includes a plurality of openings, and the at least one absorption pattern is configured to absorb light having the second wavelength, each of the plurality of openings overlapping a corresponding absorption pattern; 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.

18. The pen touch system according to claim 17, wherein: The at least one insulating layer is disposed between a photosensitive layer included in the code pattern layer and the at least one absorption pattern.

19. The pen touch system according to claim 17 or 18, wherein: The code pattern layer includes: a plurality of data cell regions arranged in rows and columns; a plurality of first cell guide lines, each of which is arranged between adjacent data cell regions along a first direction; and a plurality of second cell guide lines, each of which is arranged between adjacent data cell regions along a second direction different from the ground direction.

20. The pen touch system according to claim 19, wherein: The code pattern layer further includes: a plurality of data code patterns provided in each of the plurality of data cell regions and arranged in rows and columns, a pattern in which the plurality of data code patterns are arranged being configured to be different for each of the plurality of data cell regions.

Images