Display device

Abstract

A display device includes: a substrate having an emission area and a sensing area; a light emitting element on the substrate and overlapping the emission region; a light receiving element on the substrate and overlapping the sensing region; an upper layer over the light emitting element and the light receiving element and including a sensing opening overlapping the light receiving element; and a convex light transmitting portion filling the sensing opening and including a convex upper surface.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0097697 filed in the Korean Intellectual Property Office on July 26, 2023, the disclosure of which is incorporated herein in its entirety by reference. Technical Field

[0003] Aspects of one or more embodiments relate to a display device. Background Art

[0004] In general, a display device includes a light emitting element such as an organic light emitting diode and a thin film transistor on a substrate, and operates by causing the display element to emit light.

[0005] In some display devices, each pixel of the display device may have a light-emitting element such as an organic light-emitting diode, wherein an intermediate layer including an emission layer is located between a pixel electrode and an opposing electrode. In the display device, whether each pixel emits light or the degree of light emission is usually controlled via a thin film transistor electrically connected to the pixel electrode. Some layers included in the intermediate layer of such a display element may be provided to a plurality of light-emitting elements in common.

[0006] The above information disclosed in this technical background section is only for enhancement of understanding of the background and therefore the information discussed in this technical background section does not necessarily constitute prior art. Summary of the invention

[0007] Aspects of one or more embodiments include a display device including a light receiving element having relatively improved detection capability (light detection capability). However, such a feature is merely an example, and embodiments according to the present disclosure are not limited thereto.

[0008] Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the embodiments presented in the disclosure.

[0009] According to some embodiments of the present disclosure, a display device includes: a substrate, including an emission area and a sensing area; a light emitting element, arranged on the substrate and overlapping with the emission area; a light receiving element, arranged on the substrate and overlapping with the sensing area; an upper layer, arranged on the light emitting element and the light receiving element and including a sensing opening overlapping with the light receiving element; and a convex light transmitting portion, filling the sensing opening and including a raised upper surface.

[0010] According to some embodiments, the upper layer may be a light blocking layer including a light blocking material, wherein the light blocking layer may include a first light blocking layer opening overlapping the light emitting element and a second light blocking layer opening overlapping the light receiving element, wherein the sensing opening may be the second light blocking layer opening, and the convex light transmitting portion may be arranged in the second light blocking layer opening.

[0011] According to some embodiments, the display device may further include a color filter layer filling the first light blocking layer opening, wherein the color filter layer may include a first color filter, a second color filter, and a third color filter configured to transmit light of different colors from each other.

[0012] According to some embodiments, the convex light transmitting portion and at least one of the first color filter, the second color filter, and the third color filter may include the same material.

[0013] According to some embodiments, the convex light transmitting portion may be configured to transmit light having a wavelength in a range of 495 nm to 580 nm.

[0014] According to some embodiments, a cross-section of the convex light transmitting portion may have a shape that becomes thicker toward a center of the convex light transmitting portion based on a thickness direction of the substrate, wherein a central portion of the convex light transmitting portion may be thicker than the light blocking layer.

[0015] According to some embodiments, the display device may further include a cladding layer disposed above the light blocking layer and the color filter layer, wherein a refractive index of the convex light transmitting portion may be higher than a refractive index of the cladding layer.

[0016] According to some embodiments, a difference between the refractive index of the convex light transmitting portion and the refractive index of the cladding layer may be 0.1 to 0.3.

[0017] According to some embodiments, the display device may further include a thin film encapsulation layer covering the light emitting element and the light receiving element, and an input sensing layer disposed between the thin film encapsulation layer and the light blocking layer.

[0018] According to some embodiments, the display device may further include an input sensing layer arranged above the light emitting element and the light receiving element, wherein the input sensing layer may include a first conductive layer, a first inorganic insulating layer arranged on the first conductive layer, a second conductive layer arranged on the first inorganic insulating layer, and a second inorganic insulating layer arranged on the second conductive layer, wherein the first conductive layer may include a first conductive layer opening overlapping with the light receiving element, and the second conductive layer may include a second conductive layer opening overlapping with the light receiving element, wherein the upper layer may be at least one of the first conductive layer and the second conductive layer.

[0019] According to some embodiments, the display device may further include a polarization layer arranged on the input sensing layer.

[0020] According to some embodiments, the upper layer may be the first conductive layer, the sensing opening may be the first conductive layer opening, and the convex light transmitting portion may be arranged in the first conductive layer opening.

[0021] According to some embodiments, the first inorganic insulating layer may cover the convex light transmitting portion.

[0022] According to some embodiments, the convex light transmitting portion may have a higher refractive index than that of the first inorganic insulating layer.

[0023] According to some embodiments, a difference between the refractive index of the convex light transmitting portion and the refractive index of the first inorganic insulating layer may be 0.1 to 0.3.

[0024] According to some embodiments, the upper layer may be the second conductive layer, the sensing opening may be the second conductive layer opening, and the convex light transmitting portion may be arranged in the second conductive layer opening.

[0025] According to some embodiments, the second inorganic insulating layer may cover the convex light transmitting portion.

[0026] According to some embodiments, a refractive index of the convex light transmitting portion may be higher than a refractive index of the second organic insulating layer.

[0027] According to some embodiments, a difference between the refractive index of the convex light transmitting portion and the refractive index of the second inorganic insulating layer may be 0.1 to 0.3.

[0028] According to some embodiments, the display device may further include a thin film encapsulation layer covering the light emitting element and the light receiving element and disposed under the input sensing layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other aspects, features and characteristics of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a schematic plan view of a portion of a display device according to some embodiments;

[0031] Figure 2 According to some embodiments, Figure 1 The line A-A' intercepts Figure 1 A schematic cross-sectional view of a display device;

[0032] Figure 3A is a schematic cross-sectional view of a display panel of a display device according to some embodiments;

[0033] Figure 3B is a schematic cross-sectional view of a display panel of a display device according to some embodiments;

[0034] Figure 4 is an equivalent circuit diagram of a pixel circuit electrically connected to a light emitting element included in a pixel of a display device according to some embodiments;

[0035] Figure 5 is a schematic cross-sectional view of a portion of a display device according to some embodiments;

[0036] Figure 6 is a schematic plan view of an input sensing layer of a display device according to some embodiments;

[0037] Figure 7 is a schematic plan view of a portion of a display device according to some embodiments, and Figure 7 yes Figure 1 An enlarged schematic plan view of area B;

[0038] Figure 8 It is along Figure 7 A schematic cross-sectional view of a portion of a display device according to some embodiments, taken along line CC';

[0039] Fig. 9 is a schematic cross-sectional view of a portion of a display device according to some embodiments; and

[0040] Fig.10 is a schematic cross-sectional view of a portion of a display device according to some embodiments. DETAILED DESCRIPTION

[0041] Now will refer to the aspects of some embodiments in more detail, examples of which are shown in the accompanying drawings, wherein the same reference numerals always indicate the same elements. In this regard, the present embodiment can have different forms and should not be construed as being limited to the description set forth herein. Therefore, the following only describes the embodiments to explain the aspects of this specification by referring to the accompanying drawings. The term "and / or" as used herein includes any combination and all combinations of one or more related listed items. Throughout the disclosure, the expression "at least one of a, b, and c" indicates only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or their variations.

[0042] Because this specification allows various variations and numerous embodiments, specific embodiments will be shown in the drawings and described in the written description. From the detailed description of one or more embodiments below in conjunction with the drawings, aspects and features of one or more embodiments and their implementation methods will become apparent. However, the present embodiment can have different forms and should not be construed as being limited to the description set forth herein.

[0043] Aspects of one or more embodiments will be described in more detail below with reference to the accompanying drawings. Those elements that are or correspond to each other are given the same reference numerals regardless of the figure numbers, and redundant descriptions are omitted.

[0044] Although terms such as "first" and "second" may be used to describe various elements, such elements must not be limited to the above terms. The above terms are only used to distinguish one element from another element.

[0045] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0046] It will be understood that the terms “comprising,” “including,” and “having” used herein specify the presence of stated features or elements, but do not preclude the presence or addition of one or more other features or elements.

[0047] It will also be understood that when a layer, region or element is referred to as being "on" another layer, region or element, the layer, region or element can be directly or indirectly on the other layer, region or element. That is, for example, intervening layers, regions or elements may be present.

[0048] For the convenience of explanation, the size of the elements in the drawings may be exaggerated or reduced. For example, since the size and thickness of the elements in the drawings are arbitrarily shown for the convenience of explanation, the following embodiments are not limited thereto.

[0049] When the embodiment can be implemented differently, the order of a specific process can be performed differently from the described order. For example, two processes described successively can be performed substantially simultaneously or in the reverse order of the described order.

[0050] It will also be understood that when layers, regions, or elements are referred to as being connected to each other, they may be directly connected to each other, or they may be indirectly connected to each other with intervening layers, regions, or elements between them. For example, when layers, regions, or elements are referred to as being electrically connected to each other, they may be directly electrically connected to each other, or they may be indirectly electrically connected to each other with intervening layers, regions, or elements between them.

[0051] Figure 1 is a schematic plan view of a portion of a display device 1 according to some embodiments.

[0052] Reference Figure 1 , the display device 1 includes a display area DA and a peripheral area NDA outside the display area DA (e.g., outside the display area DA or outside the coverage area of ​​the display area DA). A plurality of pixels P including display elements are arranged in the display area DA, and the display device 1 can display an image by using light emitted from the plurality of pixels P arranged in the display area DA. The peripheral area NDA is a non-display area where the display element is not arranged, and the display area DA may be completely surrounded by the peripheral area NDA.

[0053] although Figure 1 The display device 1 including a flat display surface is shown, but one or more embodiments are not limited thereto. According to some embodiments, the display device 1 may include a stereoscopic display surface or a curved display surface.

[0054] When the display device 1 includes a stereoscopic display surface, the display device 1 includes a plurality of display areas indicating different directions, and may include, for example, a polygonal columnar display surface. According to some embodiments, when the display device 1 includes a curved display surface, the display device 1 may be implemented in various forms, such as a flexible (e.g., foldable or rollable) display device.

[0055] Furthermore, according to some embodiments, Figure 1 A display device 1 applicable to a mobile phone terminal is shown. According to some embodiments, an electronic module, a camera module, a power module, etc. mounted on a main board may be arranged in a bracket / housing, etc. together with the display device 1, thereby constituting a mobile phone terminal. The display device 1 described herein may be applied to large electronic devices such as televisions and monitors, and may also be applied to small and medium-sized electronic devices such as tablet personal computers, car navigation systems, game consoles, and smart watches.

[0056] although Figure 1A case is shown in which the display area DA of the display device 1 according to some embodiments has a quadrilateral shape with rounded corners, but the shape of the display area DA may be a circle, an ellipse, or other polygons such as a triangle or a pentagon.

[0057] Although an organic light-emitting display device is shown below as a display device 1 according to some embodiments, the display device 1 described herein is not limited thereto. According to some embodiments, the display device 1 described herein may be a display device such as an inorganic light-emitting display (or an inorganic electroluminescent (EL) display) or a quantum dot light-emitting display. For example, the emission layer of the display element in the display device 1 may include an organic material, an inorganic material, a quantum dot, an organic material and a quantum dot, or an inorganic material and a quantum dot.

[0058] Figure 2 According to some embodiments, Figure 1 The line A-A' intercepts Figure 1 Schematic cross-sectional view of a display device 1. Figure 3A is a schematic cross-sectional view of a display panel DP of a display device according to some embodiments. Figure 3B is a schematic cross-sectional view of a display panel DP of a display device according to some embodiments. Figures 2 to 3B It is simplified to describe the stacking relationship of functional panels and / or functional layers constituting a display device.

[0059] Reference Figure 2 The display device 1 according to some embodiments may include a display layer DU, an input sensing layer TU, an optical functional layer, a color filter member CU, a polarization member PU, and a cover window CW. At least some of the display layer DU, the input sensing layer TU, the color filter member CU, the polarization member PU, and the cover window CW may be formed by a continuous process, or at least some of them may be coupled to each other via an adhesive member AD. Figure 2 The adhesive member AD may include an optically clear adhesive (OCA). However, one or more embodiments are not limited thereto, and the adhesive member AD described below may include a typical adhesive or a typical pressure-sensitive adhesive. According to some embodiments, the cover window CW may be replaced by another element or may be omitted.

[0060] According to some embodiments, the input sensing layer TU is directly on the display layer DU. As used herein, the description "element (B) is directly on element (A)" means that there is no separate adhesive layer / adhesive member between element (A) and element (B). After forming element (A), element (B) is formed on the substrate surface provided by element (A) via a continuous process.

[0061] According to some embodiments, a structure including a display layer DU, an input sensing layer TU, and a color filter member CU or a structure including a display layer DU, an input sensing layer TU, and a polarization member PU may be defined as a display panel DP. Figure 2 As shown in FIG. 8 , the adhesive member AD may be between the display panel DP and the cover window CW.

[0062] The display layer DU generates an image, and the input sensing layer TU obtains coordinate information about an external input (e.g., a touch event). Although not shown separately, the display panel DP according to some embodiments may further include a protective member located below the display layer DU. The protective member and the display panel DP may be coupled to each other via an adhesive member. According to some embodiments, an optical functional layer may be additionally located on the input sensing layer TU. The optical functional layer may relatively improve light efficiency. The optical functional layer may relatively improve the front light efficiency and / or side visibility of light emitted from a light emitting element (e.g., an organic light emitting diode OLED).

[0063] According to some embodiments, the color filter member CU may be located between the input sensing layer TU and the cover window CW. The color filter member CU may include a color filter corresponding to the emission area of ​​each pixel P and a light blocking layer corresponding to the non-emission area between the pixels P. According to some embodiments, the polarization member PU may be located between the input sensing layer TU and the cover window CW instead of the color filter member CU. The polarization member PU may include a polarization layer, and the polarization layer may reduce the reflectivity of external light incident on the display panel DP.

[0064] In the following, reference will be made to Figure 3A and Figure 3B The structures of the display layer DU, the input sensing layer TU, the color filter member CU, and the polarization member PU are described in more detail. Figure 3A and Figure 3B , the display panel DP may include a display layer DU, an input sensing layer TU, and a color filter member CU. Alternatively, the display panel DP may include a display layer DU, an input sensing layer TU, and a polarization member PU.

[0065] The display layer DU may include a circuit layer CL, a light emitting element (eg, an organic light emitting diode OLED), and a thin film encapsulation layer TFE sequentially disposed on the substrate 100. The input sensing layer TU may be directly disposed on the thin film encapsulation layer TFE. The thin film encapsulation layer TFE may include at least one ( Figure 8 The organic encapsulation layer 320 is formed by a continuous process, and thus a relatively flat substrate surface can be provided. Therefore, even when the elements of the input sensing layer TU described below are formed via a continuous process, the defect rate can be reduced.

[0066] The input sensing layer TU may have a multilayer structure. The input sensing layer TU includes a sensing electrode, a trace connected to the sensing electrode, and at least one insulating layer. The input sensing layer TU may sense an external input, for example, in a capacitive manner. In the present disclosure, the operation method of the input sensing layer TU is not particularly limited, and according to some embodiments, the input sensing layer TU may sense an external input in an electromagnetic induction manner or a pressure sensing manner.

[0067] like Figure 3A and Figure 3B As shown in , the input sensing layer TU according to some embodiments may include a first conductive layer MTL1, a first inorganic insulating layer IL1, a second conductive layer MTL2, and a second inorganic insulating layer IL2. According to some embodiments, an additional insulating layer may be located between the first conductive layer MTL1 and the thin film encapsulation layer TFE.

[0068] According to some embodiments, each of the first conductive layer MTL1 and the second conductive layer MTL2 may have a single-layer structure or a stacked multilayer structure. The conductive layer having a single-layer structure may include a metal layer or a transparent conductive layer. The metal layer may include molybdenum, silver, titanium, copper, aluminum, and their alloys. The transparent conductive layer may include transparent conductive oxides such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), etc. In addition, the transparent conductive layer may include conductive polymers such as poly (3,4-ethylenedioxythiophene) (PEDOT), metal nanowires, graphene, etc. The conductive layer having a multilayer structure may include a plurality of metal layers. The plurality of metal layers may have, for example, a three-layer structure of titanium / aluminum / titanium (Ti / Al / Ti). The conductive layer having a multilayer structure may include at least one metal layer and at least one transparent conductive layer.

[0069] Each of the first conductive layer MTL1 and the second conductive layer MTL2 includes a plurality of patterns. Hereinafter, the first conductive layer MTL1 may be understood as including a first conductive pattern, and the second conductive layer MTL2 may be understood as including a second conductive pattern. The first conductive pattern and the second conductive pattern may form Figure 6 According to some embodiments, the sensing electrode may have a Figure 6 Describes the shape of the grid to prevent or reduce recognition by the user.

[0070] Each of the first inorganic insulating layer IL1 and the second inorganic insulating layer IL2 may have a single layer or a multilayer structure. Each of the first inorganic insulating layer IL1 and the second inorganic insulating layer IL2 may include an inorganic material or a composite material. For example, at least one of the first inorganic insulating layer IL1 and the second inorganic insulating layer IL2 may include an inorganic layer. The inorganic layer may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, and hafnium oxide. According to some embodiments, the first inorganic insulating layer IL1 and / or the second inorganic insulating layer IL2 may be replaced with an organic insulating layer.

[0071] According to some embodiments, Figure 3A As shown in , the color filter member CU may be directly located on the input sensing layer TU. The color filter member CU may include a light blocking layer BM and a color filter layer CF on the light blocking layer BM. The light blocking layer BM may be a black matrix that at least partially absorbs external reflected light or internal reflected light. The color filter layer CF may have a color corresponding to the light emitted from the emission layer located below each color filter layer CF.

[0072] According to some embodiments, Figure 3B As shown in , the polarization member PU may be located on the input sensing layer TU instead of the color filter member CU. The polarization member PU may include a polarization layer POL. The polarization layer POL may be used as an anti-reflection layer to reduce external light reflection to increase contrast and visibility. The polarization layer POL may include a linear polarizer and a phase retarder.

[0073] Figure 4 is an equivalent circuit diagram of a pixel circuit PC electrically connected to a light emitting element included in a pixel P of a display device according to some embodiments.

[0074] Reference Figure 4 , each pixel P includes a pixel circuit PC connected to a scan line SL and a data line DL and a light emitting element (eg, an organic light emitting diode OLED) connected to the pixel circuit PC.

[0075] The pixel circuit PC includes a driving thin film transistor Td, a switching thin film transistor Ts and a storage capacitor Cst. The switching thin film transistor Ts is connected to the scan line SL and the data line DL and is configured to transfer a data signal Dm input through the data line DL to the driving thin film transistor Td according to a scan signal Sn input through the scan line SL.

[0076] The storage capacitor Cst is connected to the switching thin film transistor Ts and the driving voltage line PL, and stores a voltage corresponding to a difference between a voltage received from the switching thin film transistor Ts and a driving voltage ELVDD supplied to the driving voltage line PL.

[0077] The driving thin film transistor Td is connected to the driving voltage line PL and the storage capacitor Cst, and may be configured to control a driving current I flowing from the driving voltage line PL through the organic light emitting diode OLED in response to a voltage stored in the storage capacitor Cst. d The organic light emitting diode OLED can be driven by the driving current I d Emit light with a specific brightness.

[0078] although Figure 4 The case where the pixel circuit PC includes two thin film transistors and one storage capacitor is shown, but the embodiments according to the present disclosure are not limited thereto. According to some embodiments, the pixel circuit PC may include seven thin film transistors and one storage capacitor. According to some embodiments, the pixel circuit PC may include two or more storage capacitors. According to some embodiments, without departing from the spirit and scope of the embodiments according to the present disclosure, the pixel circuit PC may include additional components, or include fewer components than the above components.

[0079] Figure 5 is a schematic cross-sectional view of a portion of a display device 1 according to some embodiments.

[0080] Reference Figure 5 According to some embodiments, the display device 1 may include a first light emitting element ED1, a second light emitting element ED2, a third light emitting element ED3, and a first light receiving element PD1. The first light emitting element ED1, the second light emitting element ED2, and the third light emitting element ED3 may emit light of different colors from each other. For example, the first light emitting element ED1 may emit green light, the second light emitting element ED2 may emit red light, and the third light emitting element ED3 may emit blue light.

[0081] like Figure 5 As shown in , the display device 1 may have a function of sensing an object (e.g., a fingerprint of a finger F) in contact with the cover window CW. Among the light emitted from at least one of the first light emitting element ED1, the second light emitting element ED2, and the third light emitting element ED3, at least a portion of the reflected light reflected from the user's fingerprint may be re-incident on the first light receiving element PD1, and thus, the first light receiving element PD1 may detect the reflected light. For example, the green light emitted from the first light emitting element ED1 may be reflected from the object in contact with the cover window CW and re-incident on the first light receiving element PD1, and thus, the first light receiving element PD1 may detect the re-incident green light.

[0082] Figure 6 is a display device 1 according to some embodiments (see Figure 1 ) is a schematic plan view of the input sensing layer TU.

[0083] like Figure 6As shown in , the input sensing layer TU may include first sensing electrodes IE1-1 to IE1-5, first signal lines SL1-1 to SL1-5 connected to the first sensing electrodes IE1-1 to IE1-5, second sensing electrodes IE2-1 to IE2-4, and second signal lines SL2-1 to SL2-4 connected to the second sensing electrodes IE2-1 to IE2-4. According to some embodiments, the input sensing layer TU may further include an optical dummy electrode arranged in a boundary area between the first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4.

[0084] Figure 3A The thin film encapsulation layer TFE shown in FIG. 1 includes at least one organic encapsulation layer 320 (see Figure 8 ), and thus a flatter substrate surface is provided. Therefore, even when the above elements of the input sensing layer TU are formed via a continuous process, the defect rate can be reduced. The first signal lines SL1-1 to SL1-5 and the second signal lines SL2-1 to SL2-4 can be arranged in the peripheral area NDA with a reduced step difference to have a uniform thickness. Therefore, for the first signal lines SL1-1 to SL1-5 and the second signal lines SL2-1 to SL2-4, the stress caused by the step difference of the lower layer thereof can be reduced.

[0085] The first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 cross each other. The first sensing electrodes IE1-1 to IE1-5 may be arranged in the second direction (e.g., direction y), and each of the first sensing electrodes IE1-1 to IE1-5 may extend in the first direction (e.g., direction x). The second sensing electrodes IE2-1 to IE2-4 may be arranged in the first direction (e.g., direction x), and each of the second sensing electrodes IE2-1 to IE2-4 may extend in the second direction (e.g., direction y).

[0086] Each of the first sensing electrodes IE1-1 to IE1-5 includes a first sensor portion SP1 and a first connection portion CP1. Each of the second sensing electrodes IE2-1 to IE2-4 includes a second sensor portion SP2 and a second connection portion CP2. Among the first sensor portions SP1, the two first sensor portions arranged at both ends of the first sensing electrode may have a size smaller than that of the first sensor portion arranged at the center (e.g., half the size of the first sensor portion arranged at the center). Among the second sensor portions SP2, the two second sensor portions arranged at both ends of the second sensing electrode may have a size smaller than that of the second sensor portion arranged at the center (e.g., half the size of the second sensor portion arranged at the center).

[0087] although Figure 6 The first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 according to some embodiments are shown, but their shapes are not limited thereto. According to some embodiments, the first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 may have a shape (e.g., a bar shape) in which there is no distinction between the sensor portion and the connection portion. Although the first sensor portion SP1 and the second sensor portion SP2 having a rhombus shape are shown as an example, one or more embodiments are not limited thereto, and the first sensor portion SP1 and the second sensor portion SP2 may have another polygonal shape.

[0088] In one first sensing electrode, the first sensor parts SP1 are arranged in a first direction (e.g., direction x), and in one second sensing electrode, the second sensor parts SP2 are arranged in a second direction (e.g., direction y). Each of the first connection parts CP1 connects adjacent first sensor parts SP1 to each other, and each of the second connection parts CP2 connects adjacent second sensor parts SP2 to each other.

[0089] The first signal lines SL1-1 to SL1-5 are respectively connected to one end of the first sensing electrodes IE1-1 to IE1-5. The second signal lines SL2-1 to SL2-4 are connected to both ends of the second sensing electrodes IE2-1 to IE2-4. According to some embodiments, the first signal lines SL1-1 to SL1-5 may also be connected to both ends of the first sensing electrodes IE1-1 to IE1-5. According to some embodiments, the second signal lines SL2-1 to SL2-4 may be respectively connected to only one end of the second sensing electrodes IE2-1 to IE2-4.

[0090] The first signal lines SL1-1 to SL1-5 and the second signal lines SL2-1 to SL2-4 may be connected to the pad portion PD located at one side. The pad portion PD may be aligned with the pad area PDA.

[0091] According to some embodiments, the positions of the first signal lines SL1-1 to SL1-5 and the second signal lines SL2-1 to SL2-4 may be reversed. Figure 6 Unlike shown in FIG. 1 , the first signal lines SL1 - 1 to SL1 - 5 may be arranged on the left side, and the second signal lines SL2 - 1 to SL2 - 4 may be arranged on the right side.

[0092] Reference Figure 6According to some embodiments, the first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 may have a mesh shape. Since the first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 have a mesh shape, the Figure 2 In addition, as described below, the first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 do not overlap with the emission area and are therefore not visible to the user of the display device 1.

[0093] The first sensing electrodes IE1-1 to IE1-5 and the second sensing electrodes IE2-1 to IE2-4 having a mesh shape may be formed of a metal capable of low temperature processing, and may include, for example, silver, aluminum, copper, chromium, nickel, titanium, etc. Therefore, even when the input sensing layer TU is formed through a continuous process, damage to the light emitting element may be prevented or reduced.

[0094] Figure 7 is a display device 1 according to some embodiments (see Figure 1 ), and Figure 7 yes Figure 1 An enlarged schematic plan view of area B. Figure 7 , for convenience, a plan view of the bank layer 109 is shown.

[0095] Reference Figure 7 , the display device 1 may include a plurality of light emitting elements and a plurality of light receiving elements. The plurality of light emitting elements may include a first light emitting element ED1, a second light emitting element ED2, and a third light emitting element ED3. The plurality of light receiving elements may include a first light receiving element PD1, and may further include a light receiving element. The first light emitting element ED1, the second light emitting element ED2, and the third light emitting element ED3 may emit light of different colors from each other. For example, the first light emitting element ED1 may emit green light, the second light emitting element ED2 may emit red light, and the third light emitting element ED3 may emit blue light. The red light may be light in the 580nm to 780nm band, the blue light may be light in the 380nm to 495nm band, and the green light may be light in the 495nm to 580nm band. The first light receiving element PD1 may sense an object by detecting light emitted from the first light emitting element ED1, the second light emitting element ED2, and the third light emitting element ED3 and reflected by the object. According to some embodiments, the first light receiving element PD1 may detect light in the 495nm to 580nm band emitted from the first light emitting element ED1 and reflected by the object.

[0096] Each light emitting element may include a pixel electrode, an opposing electrode, and an intermediate layer therebetween, and a light receiving element may include a sensing electrode, an opposing electrode, and an intermediate layer therebetween. Therefore, the first light emitting element ED1 may include a first pixel electrode 210-1, the second light emitting element ED2 may include a second pixel electrode 210-3, the third light emitting element ED3 may include a third pixel electrode 210-4, and the first light receiving element PD1 may include a first sensing electrode 210-2. The first pixel electrode 210-1, the second pixel electrode 210-3, the third pixel electrode 210-4, and the first sensing electrode 210-2 may be formed on the substrate 100 (refer to Figure 8 ) are separated from each other. The phrase "in a plan view" as used herein refers to a plan view taken in a direction perpendicular to the substrate 100. That is, the description "A and B separated from each other in a plan view" means "A and B separated from each other when viewed in a direction perpendicular to the substrate 100 (e.g., in a plan view)".

[0097] The bank layer 109 may be located on the first pixel electrode 210-1, the second pixel electrode 210-3, the third pixel electrode 210-4, and the first sensing electrode 210-2, and may cover the edge of each of the first pixel electrode 210-1, the second pixel electrode 210-3, the third pixel electrode 210-4, and the first sensing electrode 210-2. That is, the bank layer 109 may have a first bank layer opening LOP1 exposing a central portion of the first pixel electrode 210-1, a second bank layer opening LOP2 exposing a central portion of the first sensing electrode 210-2, a third bank layer opening LOP3 exposing a central portion of the second pixel electrode 210-3, and a fourth bank layer opening LOP4 exposing a central portion of the third pixel electrode 210-4.

[0098] According to some embodiments, an emission layer for emitting light may be respectively located in a first bank layer opening LOP1, a third bank layer opening LOP3, and a fourth bank layer opening LOP4 of the bank layer 109, and an active layer for detecting light may be located in a second bank layer opening LOP2 of the bank layer 109. The relative electrode may be located on the emission layer and the active layer. As described above, the stacked structure of the pixel electrode, the emission layer, and the relative electrode may constitute a light emitting element. In addition, as described above, the stacked structure of the sensing electrode, the active layer, and the relative electrode may constitute a light receiving element. An opening in the bank layer 109 may correspond to a light emitting element, and an emission area may be defined. Alternatively, an opening in the bank layer 109 may correspond to a light receiving element, and a sensing area may be defined.

[0099] For example, an emission layer for emitting green light may be arranged in the first bank layer opening LOP1, and thus, the first bank layer opening LOP1 may define a first emission area EA1. Similarly, an emission layer for emitting red light may be arranged in the third bank layer opening LOP3, and thus, the third bank layer opening LOP3 may define a second emission area EA2. An emission layer for emitting blue light may be arranged in the fourth bank layer opening LOP4, and thus, the fourth bank layer opening LOP4 may define a third emission area EA3. An active layer for detecting light may be arranged in the second bank layer opening LOP2, and thus, the second bank layer opening LOP2 may define a first sensing area SA1.

[0100] Therefore, the area of ​​the first bank opening LOP1 is equal to the area of ​​the first emission area EA1. The area of ​​the second bank opening LOP2 is equal to the area of ​​the first sensing area SA1, and the area of ​​the third bank opening LOP3 is equal to the area of ​​the second emission area EA2. The area of ​​the fourth bank opening LOP4 is equal to the area of ​​the third emission area EA3.

[0101] When perpendicular to ( Figure 8 When observed in a direction (e.g., direction z) of the substrate 100 (e.g., in a plan view), each of the first bank opening LOP1, the second bank opening LOP2, the third bank opening LOP3, and the fourth bank opening LOP4 may have a polygonal shape. In other words, when observed in a direction (e.g., direction z) perpendicular to the substrate 100 (e.g., in a plan view), each of the first emission area EA1, the second emission area EA2, the third emission area EA3, and the first sensing area SA1 may have a polygonal shape. Figure 7 In the figure, when viewed in a direction perpendicular to the substrate 100 (e.g., direction z) (e.g., in a plan view), each of the first emission area EA1, the second emission area EA2, the third emission area EA3, and the first sensing area SA1 is shown as having a quadrilateral shape (e.g., a quadrilateral shape with rounded corners). However, the embodiments according to the present disclosure are not limited thereto. For example, when viewed in a direction perpendicular to the substrate 100 (e.g., direction z) (e.g., in a plan view), each of the first emission area EA1, the second emission area EA2, the third emission area EA3, and the first sensing area SA1 may have a circular shape or an elliptical shape.

[0102] Figure 8 It is along Figure 7 Schematic cross-sectional view of a portion of the display device 1 according to some embodiments, taken along line CC'.

[0103] Reference Figure 8, the display device 1 may include a substrate 100 , a thin film transistor TFT, a first light emitting element ED1 , a first light receiving element PD1 , a thin film encapsulation layer TFE, an input sensing layer TU, a color filter member CU, and a cover window CW.

[0104] The substrate 100 may include glass or a polymer resin. The substrate 100 may include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The substrate 100 including the polymer resin may be flexible (e.g., rollable or bendable). The substrate 100 may have a multilayer structure including a layer including the above polymer resin and an inorganic layer.

[0105] The buffer layer 101 may be located on the substrate 100 to reduce or prevent foreign matter, moisture, or external air from penetrating from below the substrate 100, and may provide a flat surface on the substrate 100. The buffer layer 101 may include an inorganic material such as an oxide or a nitride, an organic material, or an organic-inorganic compound, and may have a single-layer or multi-layer structure including an inorganic material and an organic material. According to some embodiments, the buffer layer 101 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ) and / or silicon oxynitride (SiO x N y ).

[0106] The thin film transistor TFT may be located on the buffer layer 101. The thin film transistor TFT may include a semiconductor layer Act, a gate electrode GE, a source electrode SE, and a drain electrode DE. Figure 8 A top gate type is shown in which the gate electrode GE is arranged on the semiconductor layer Act with the gate insulating layer 103 therebetween, but one or more embodiments are not limited thereto. For example, the thin film transistor TFT may be a bottom gate type.

[0107] The semiconductor layer Act may be on the buffer layer 101. The semiconductor layer Act may include a channel region, a source region and a drain region arranged on both sides of the channel region and doped with impurities. In this regard, the impurities may include N-type impurities or P-type impurities. The semiconductor layer Act may include amorphous silicon or polycrystalline silicon. According to some embodiments, the semiconductor layer Act may include indium (In), gallium (Ga), tin (Sn), zirconium (Zr), vanadium (V), hafnium (Hf), cadmium (Cd), germanium (Ge), chromium (Cr), titanium (Ti), aluminum (Al), cesium (Cs), cerium (Ce) and zinc (Zn). In addition, the semiconductor layer Act may include a zinc oxide-based material such as zinc oxide, indium zinc oxide, gallium indium zinc oxide, etc. In addition, the semiconductor layer Act may be an indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO) or indium gallium tin zinc oxide (IGTZO) semiconductor containing metals such as indium (In), gallium (Ga) and tin (Sn) in ZnO.

[0108] The gate electrode GE may be arranged on the semiconductor layer Act to overlap at least partially with the semiconductor layer Act. For example, the gate electrode GE may overlap with the channel region of the semiconductor layer Act. The gate electrode GE may include various conductive materials including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may have various layer structures. For example, the gate electrode GE may include a Mo layer and an Al layer, or may have a multilayer structure of a Mo layer / Al layer / Mo layer.

[0109] The gate insulating layer 103 may be located between the semiconductor layer Act and the gate electrode GE. The gate insulating layer 103 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ) and / or silicon oxynitride (SiO x N y ), and may have a single-layer or multi-layer structure.

[0110] The source electrode SE and the drain electrode DE may be connected to the source region and the drain region of the semiconductor layer Act via contact holes. The source electrode SE and the drain electrode DE may include various conductive materials including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may have various layer structures. For example, the source electrode SE and the drain electrode DE may include a Ti layer and an Al layer, or may have a multilayer structure of a Ti layer / Al layer / Ti layer. In addition, the source electrode SE and the drain electrode DE may have a multilayer structure including an ITO layer covering a metal material.

[0111] The interlayer insulating layer 105 may be located between the gate electrode GE and the source electrode SE and between the gate electrode GE and the drain electrode DE. The interlayer insulating layer 105 may include silicon oxide (SiO x), Silicon Nitride (SiN x ) and / or silicon oxynitride (SiO x N y ), and may have a single-layer or multi-layer structure.

[0112] The thin film transistor TFT may be covered by an organic insulating layer 107. For example, the organic insulating layer 107 may cover the source electrode SE and the drain electrode DE. The organic insulating layer 107 as a planarization insulating layer may have a substantially flat upper surface. The organic insulating layer 107 may include an organic insulating material, such as a general commercial polymer (such as polystyrene (PS)), a polymer derivative having a phenolic group, an acrylic polymer (such as polymethyl methacrylate (PMMA)), an imide polymer, an aryl ether polymer, an amide polymer, a fluorine polymer, a paraxylene polymer, a vinyl alcohol polymer, and a mixture thereof. According to some embodiments, the organic insulating layer 107 may include polyimide.

[0113] The first pixel electrode 210-1, the first sensing electrode 210-2, and the bank layer 109 may be located on the organic insulating layer 107. The bank layer 109 may be located on the organic insulating layer 107 while covering edges of the first pixel electrode 210-1 and the first sensing electrode 210-2.

[0114] A first bank opening LOP1 exposing at least a central portion of the first pixel electrode 210-1 and a second bank opening LOP2 exposing at least a central portion of the first sensing electrode 210-2 may be disposed in the bank 109. Thus, the first bank opening LOP1 may define a first emission area EA1, and the second bank opening LOP2 may define a first sensing area SA1.

[0115] The bank layer 109 can prevent or reduce arcing, etc. from occurring at the edge of the first pixel electrode 210-1 by increasing the distance between the edge of the first pixel electrode 210-1 and the opposite electrode 230. In addition, the bank layer 109 can prevent or reduce arcing, etc. from occurring at the edge of the first sensing electrode 210-2 by increasing the distance between the edge of the first sensing electrode 210-2 and the opposite electrode 230.

[0116] The bank layer 109 may include an organic insulating material such as polyimide, polyamide, acrylic resin, benzocyclobutene, hexamethyldisiloxane (HMDSO), and phenolic resin, and may be formed by a method such as spin coating.

[0117] The emission layer 222-1 may be arranged in the first bank opening LOP1 arranged in the bank layer 109. The emission layer 222-1 may include an organic material including a fluorescent or phosphorescent material that emits red light, green light, blue light, or white light. The emission layer 222-1 may be an organic emission layer including a low molecular weight organic material or a high molecular weight organic material. For example, the emission layer 222-1 as an organic emission layer may include copper phthalocyanine, tris (8-hydroxyquinoline) aluminum, polystyrene (PPV)-based materials, or polyfluorene-based materials.

[0118] According to some embodiments, the emission layer 222-1 may include a host material and a dopant material. The dopant material, which is a material that emits light of a specific color, may include a luminescent material. The luminescent material may include at least one of a phosphorescent dopant, a fluorescent dopant, and a quantum dot. The host material, which is the main material of the emission layer 222-1, helps the dopant material emit light.

[0119] The active layer 222-2 may be disposed in the second bank opening LOP2 disposed in the bank layer 109. The active layer 222-2 may include a p-type organic semiconductor and an n-type organic semiconductor. In this regard, the p-type organic semiconductor may serve as an electron donor, and the n-type organic semiconductor may serve as an electron acceptor.

[0120] According to some embodiments, the active layer 222-2 may be a mixed layer of a p-type organic semiconductor and an n-type organic semiconductor. In this case, the active layer 222-2 may be formed by co-depositing a p-type organic semiconductor and an n-type organic semiconductor. When the active layer 222-2 is a mixed layer, excitons may be generated within a diffusion length from a donor-acceptor interface.

[0121] According to some embodiments, the p-type organic semiconductor may be a compound used as an electron donor for supplying electrons. For example, the p-type organic semiconductor may include boron subphthalocyanine chloride (SubPc), copper (II) phthalocyanine (CuPc), tetraphenyldiphenylene (DBP), or any combination thereof, but one or more embodiments are not limited thereto.

[0122] According to some embodiments, the n-type organic semiconductor may be a compound used as an electron acceptor for accepting electrons. For example, the n-type organic semiconductor may include C60 fullerene, C70 fullerene, or any combination thereof, but one or more embodiments are not limited thereto.

[0123] The relative electrode 230 may be disposed on the emission layer 222-1 and the active layer 222-2. The relative electrode 230 disposed on the emission layer 222-1 and the active layer 222-2 may be formed integrally. The relative electrode 230 may be a transmissive electrode or a reflective electrode. According to some embodiments, the relative electrode 230 may be a transparent electrode or a semi-transparent electrode, and may include a metal film containing Li, Ca, Al, Ag, Mg and compounds thereof with a low work function, or a material having a multilayer structure such as LiF / Ca, LiF / Al. In addition to the metal film, the relative electrode 230 may also include a material such as ITO, IZO, ZnO or In 2 O 3 Transparent conductive oxide (TCO) film.

[0124] The first common layer 221 may be located between the first pixel electrode 210 - 1 and the emission layer 222 - 1 and between the first sensing electrode 210 - 2 and the active layer 222 - 2 , and the second common layer 223 may be located between the emission layer 222 - 1 and the opposing electrode 230 and between the active layer 222 - 2 and the opposing electrode 230 .

[0125] According to some embodiments, a hole transport region may be defined between the first pixel electrode 210-1 and the emission layer 222-1 and between the first sensing electrode 210-2 and the active layer 222-2, and an electron transport region may be defined between the emission layer 222-1 and the opposite electrode 230 and between the active layer 222-2 and the opposite electrode 230.

[0126] The hole transport region may have a single layer structure or a multi-layer structure. For example, the first common layer 221 may be disposed in the hole transport region. According to some embodiments, the first common layer 221 may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron blocking layer (EBL).

[0127] For example, the first common layer 221 may have a single-layer structure or a multi-layer structure. When the first common layer 221 has a multi-layer structure, the first common layer 221 may include a HIL and a HTL, a HIL and an EBL, a HTL and an EBL, or a HIL, a HTL and an EBL sequentially stacked on the first pixel electrode 210-1. However, the embodiments according to the present disclosure are not limited thereto.

[0128] According to some embodiments, the first common layer 221 may include at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (Pani / DBSA), polyaniline / camphorsulfonic acid (Pani / CSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS) and polyaniline / poly(4-styrenesulfonate) (PANI / PSS).

[0129] The electron transport region may have a single layer structure or a multilayer structure. For example, the second common layer 223 may be disposed in the electron transport region. According to some embodiments, the second common layer 223 may include at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL).

[0130] For example, the second common layer 223 may have a single layer structure or a multi-layer structure. When the second common layer 223 has a multi-layer structure, the second common layer 223 may include an ETL and an EIL, an HBL and an EIL, an HBL and an ETL, or an HBL, an ETL, and an EIL stacked sequentially on the emission layer 222-1. However, one or more embodiments are not limited thereto.

[0131] According to some embodiments, the second common layer 223 may include a layer selected from 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq 3 At least one compound selected from the group consisting of 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ) and NTAZ.

[0132] The first light emitting element ED1 may include a first pixel electrode 210-1, a first common layer 221, an emission layer 222-1, a second common layer 223, and an opposing electrode 230 stacked in sequence. The first light receiving element PD1 may include a first sensing electrode 210-2, a first common layer 221, an active layer 222-2, a second common layer 223, and an opposing electrode 230 stacked in sequence.

[0133] The thin film transistor TFT may be located between the substrate 100 and the first light emitting element ED1. The thin film transistor TFT may be electrically connected to the first light emitting element ED1 to drive the first light emitting element ED1. For example, one of the source electrode SE and the drain electrode DE of the thin film transistor TFT may be electrically connected to the first pixel electrode 210-1 of the first light emitting element ED1.

[0134] The thin film transistor TFT may be located between the substrate 100 and the first light receiving element PD1. The thin film transistor TFT may be electrically connected to the first light receiving element PD1 to drive the first light receiving element PD1. For example, one of the source electrode SE and the drain electrode DE of the thin film transistor TFT may be electrically connected to the first sensing electrode 210-2 of the first light receiving element PD1.

[0135] The active layer 222-2 may receive light from the outside and generate excitons, and then the generated excitons may be separated into holes and electrons. When a positive potential is applied to the first sensing electrode 210-2 and a negative potential is applied to the opposite electrode 230, the holes separated in the active layer 222-2 may move toward the opposite electrode 230, and the electrons separated in the active layer 222-2 may move toward the first sensing electrode 210-2. Therefore, a photocurrent may be formed in a direction from the first sensing electrode 210-2 to the opposite electrode 230.

[0136] When a bias is applied between the first sensing electrode 210-2 and the opposite electrode 230, a dark current may flow in the first light receiving element PD1. In addition, when light is incident on the first light receiving element PD1, a photocurrent may flow in the first light receiving element PD1. According to some embodiments, the first light receiving element PD1 may detect the amount of light according to the ratio of the photocurrent and the dark current.

[0137] The auxiliary layer 240 may be located on the first light emitting element ED1 and the first light receiving element PD1. For example, the auxiliary layer 240 may be located on the opposite electrode 230. The auxiliary layer 240 may promote the movement of holes by reducing the energy barrier for the holes to move to the HTL and the anode. The auxiliary layer 240 may include, for example, fluorene compounds, carbazole compounds, diarylamine compounds, triarylamine compounds, dibenzofuran compounds, dibenzothiophene compounds, dibenzosilanol compounds, or any combination thereof.

[0138] The thin film encapsulation layer TFE may be disposed on the first light emitting element ED1 and the first light receiving element PD1. For example, the thin film encapsulation layer TFE may be located on the auxiliary layer 240. The thin film encapsulation layer TFE may include at least one inorganic encapsulation layer and at least one organic encapsulation layer, and according to some embodiments, Figure 8 A thin film encapsulation layer TFE including a first inorganic encapsulation layer 310 , an organic encapsulation layer 320 , and a second inorganic encapsulation layer 330 stacked in sequence is shown.

[0139] The first inorganic encapsulation layer 310 and the second inorganic encapsulation layer 330 may include one or more inorganic materials of aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, zinc oxide, silicon oxide, silicon nitride, and silicon oxynitride. The organic encapsulation layer 320 may include a polymer material. Examples of polymer materials may include acrylic resins, epoxy resins, polyimide, and polyethylene. According to some embodiments, the organic encapsulation layer 320 may include an acrylic resin. The organic encapsulation layer 320 may be formed by curing a monomer or applying a polymer. The organic encapsulation layer 320 may have transparency.

[0140] The input sensing layer TU may be located on the thin film encapsulation layer TFE. The input sensing layer TU may obtain coordinate information according to an external input (e.g., a touch event). The input sensing layer TU may include a first conductive layer MTL1, a first inorganic insulating layer IL1 on the first conductive layer MTL1, a second conductive layer MTL2 on the first inorganic insulating layer IL1, and a second inorganic insulating layer IL2 on the second conductive layer MTL2. The first conductive layer MTL1 and the second conductive layer MTL2 may correspond to Figure 6 According to some embodiments, an insulating layer may be additionally located between the first conductive layer MTL1 and the thin film encapsulation layer TFE.

[0141] As described above, the first sensor portion SP1 may not overlap with the emission area, and may overlap with the non-emission area. The first conductive layer MTL1 and the second conductive layer MTL2 may not overlap with the first emission area EA1 and / or the first sensing area SA1. That is, the first conductive layer MTL1 and the second conductive layer MTL2 may overlap with the bank layer 109 and / or the light blocking layer BM. According to some embodiments, in some areas, the first conductive layer MTL1 and the second conductive layer MTL2 may be electrically connected to each other via a contact hole defined in the second inorganic insulating layer IL2.

[0142] The color filter member CU may be located on the input sensing layer TU. The color filter member CU may include a light blocking layer BM, a color filter layer CF, and an overcoat layer OC.

[0143] The light blocking layer BM may be located on the input sensing layer TU. Because the light blocking layer BM includes a light blocking material, the light blocking layer BM may at least partially absorb the internal reflected light. The light blocking material may include carbon black, carbon nanotubes, a resin or paste including a black dye, or metal particles. The metal particles may be, for example, nickel, aluminum, molybdenum and / or their alloys. In addition, the light blocking material may include metal oxide particles such as chromium oxide or metal nitride particles such as chromium nitride. Because the light blocking layer BM includes a light blocking material, the light blocking layer BM may reduce external light reflection. In some cases, the light blocking layer BM may include the same material as the embankment layer 109 below. However, one or more embodiments are not limited thereto, and the light blocking layer BM may include a material different from that of the embankment layer 109.

[0144] The light blocking layer BM may include a first light blocking layer opening UOP1 corresponding to the first emission area EA1 and a second light blocking layer opening UOP2 corresponding to the first sensing area SA1. That is, the first light blocking layer opening UOP1 may overlap with the first bank layer opening LOP1, and the second light blocking layer opening UOP2 may overlap with the second bank layer opening LOP2. The area of ​​the first light blocking layer opening UOP1 may be greater than the area of ​​the first bank layer opening LOP1, and the area of ​​the second light blocking layer opening UOP2 may be greater than the area of ​​the second bank layer opening LOP2. The light blocking layer BM may include a plurality of light blocking layer openings UOP1 and UOP2, and thus may have a grid shape or a mesh shape. In addition, the shapes of the first light blocking layer opening UOP1 and the second light blocking layer opening UOP2 of the light blocking layer BM may be the same as the shapes of the first bank layer opening LOP1 and the second bank layer opening LOP2 of the bank layer 109, respectively.

[0145] The color filter layer CF may be located on the light blocking layer BM, and the color filter layer CF may include a first color filter CF1 and a second color filter CF2. The first color filter CF1 and the second color filter CF2 may transmit only light having a wavelength of a specific wavelength band. The first color filter CF1 may fill a first light blocking layer opening UOP1 of the light blocking layer BM, and the second color filter CF2 may fill a second light blocking layer opening UOP2 of the light blocking layer BM.

[0146] In the display device 1, a color filter layer CF is arranged on each pixel to reduce external light reflection. For example, in the case of a pixel emitting red light, a red color filter that transmits only red light can be arranged on the pixel, and in the case of a pixel emitting blue light, a blue color filter that transmits only blue light can be arranged on the pixel. Therefore, when external light as white light is incident on, for example, a red color filter, blue light and green light are absorbed by the red color filter, and only red light passes through the red color filter, and then reflects from the pixel electrode, passes through the red color filter again, and is emitted to the outside. Therefore, in the case of a display device with a color filter, external light reflection is reduced to about 1 / 3 compared to the case without a color filter.

[0147] The first color filter CF1 may transmit light emitted from the first light emitting element ED1. For example, when the first light emitting element ED1 emits green light, the first color filter CF1 may be a green filter that transmits green light. In addition, when the first light emitting element ED1 emits red light, the first color filter CF1 may be a red filter that transmits red light.

[0148] The second color filter CF2 may transmit the same color light as the first color filter CF1. When the first color filter CF1 is a green color filter, the second color filter CF2 may be a green color filter. In addition, when the first color filter CF1 is a red color filter, the second color filter CF2 may be a red color filter. That is, according to some embodiments, the first color filter CF1 and the second color filter CF2 may be green color filters that transmit light in the 495nm to 580nm band.

[0149] In this regard, the second color filter CF2 disposed above the first light receiving element PD1 and overlapping the first sensing area SA1 may include a convex upper surface. That is, the second color filter CF2 may be a convex light transmission portion CP having a convex lens shape. In other words, the convex light transmission portion CP may include the same material as at least one of the color filters that transmit light of different colors from each other.

[0150] For example, the convex light transmission portion CP may have a lower surface facing the substrate 100 and an upper surface facing the opposite side of the substrate 100, and the upper surface of the convex light transmission portion CP may include a convex surface protruding beyond the light blocking layer BM. In other words, based on the thickness direction of the substrate 100, the cross-section of the convex light transmission portion CP may have a shape that becomes thicker toward the center of the convex light transmission portion CP, and therefore, the thickness H2 of the central portion of the convex light transmission portion CP may be greater than the thickness H1 of the light blocking layer BM. When the above-mentioned convex light transmission portion CP has a higher refractive index than the surrounding organic material, the convex light transmission portion CP may substantially function as a convex lens. According to some embodiments, the refractive index of the second color filter CF2 may be about 0.1 to about 0.3 higher than the refractive index of the cladding layer OC described below.

[0151] Because the convex light transmission part CP disposed above the first light receiving element PD1 has a convex upper surface, light reflected by an object and incident again on the display device 1 may be refracted at the upper surface of the convex light transmission part CP and collected toward the first light receiving element PD1. Figure 8 As shown in , the light reflected by the object and entering the display device 1 may include first light L1 and L1' incident at an angle toward the upper surface of the convex light transmission part CP. The first light L1 and L1' may be refracted at an interface between the convex light transmission part CP having a convex upper surface and the cladding layer OC to have a changed path, and the refracted first light L1 and L1' may be substantially extracted in a third direction (direction z) and enter the first light receiving element PD1 as second light L2 and L2'.

[0152] In addition, the capture area, which is an area capable of receiving light into the first light receiving element PD1, can be reduced according to the refraction phenomenon of light incident on the above-mentioned convex light transmission portion CP. A plurality of light receiving elements may each have a capture area, and fingerprints may be sensed by detecting light brought thereinto from the corresponding area. In this regard, when the capture area of ​​a light receiving element is excessively widened, the capture areas of adjacent light receiving elements may overlap with each other. When the capture areas of the light receiving elements overlap with each other, the ridge signal and the valley signal of the target fingerprint may be mixed with each other to reduce the sensor performance of the light receiving element and cause an image blur problem. On the other hand, in Figure 8 In the display device 1 shown in , the light brought therein can be gathered by the convex light transmission part CP with a convex lens shape to reduce the capture area, and therefore, there may be no overlap problem between the capture areas of the light receiving elements adjacent to each other. In particular, the convex light transmission part CP can be filled in the second light blocking layer opening UOP2, and therefore, the size of the capture area can be adjusted by adjusting the opening in the light blocking layer BM. As a result, in the display device 1 according to some embodiments, the convex light transmission part CP can be arranged above the first light receiving element PD1 to reduce the capture area and also increase the light receiving efficiency, thereby relatively improving the photodetectivity of the first light receiving element PD1 and preventing or reducing defects such as image blur.

[0153] The first color filter CF1 disposed above the first light emitting element ED1 is Figure 8 However, in some embodiments, like the second color filter CF2, the first color filter CF1 may also have a convex upper surface.

[0154] The color filter member CU may further include an overcoat layer OC. The overcoat layer OC may cover the light blocking layer BM and the color filter layer CF. The overcoat layer OC may be integrally formed on the first emission area EA1 and the first sensing area SA1. The overcoat layer OC, which is a colorless transmission layer having no color in any visible band, may flatten the upper surface of the color filter member CU including the color filter layer CF. For example, the overcoat layer OC may include an organic material such as an acrylic resin, benzocyclobutene (BCB), or hexamethyldisiloxane (HMDSO).

[0155] The cover window CW may be arranged on the color filter member CU. The cover window CW may include at least one of glass, sapphire, and plastic. The cover window CW may be, for example, ultra-thin glass (UTG) or colorless polyimide (CPI).

[0156] The adhesive member AD may be located between the cover window CW and the color filter member CU. Therefore, the adhesive member AD may couple the cover window CW and the color filter member CU to each other. A general adhesive member known in the art may be used as the adhesive member AD without limitation. For example, the adhesive member AD may include an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA).

[0157] Fig. 9 is a schematic cross-sectional view of a portion of a display device 1 according to some embodiments. Fig.10 is a schematic cross-sectional view of a portion of a display device 1 according to some embodiments. Fig. 9 and Fig.10 Except for the features of the input sensing layer TU, the convex light transmission part CP and the polarization member PU, the other features are the same as those of the reference Figure 7 and Figure 8 The characteristics described are the same. Fig. 9 and Fig.10 In the components, the same reference numerals are used as above. Figure 7 and Figure 8 The reference numerals described above are replaced with those in the previous description, and the differences are mainly described below.

[0158] First, refer to Fig. 9 , the display device 1 may include a substrate 100 , a thin film transistor TFT, a first light emitting element ED1 , a first light receiving element PD1 , a thin film encapsulation layer TFE, an input sensing layer TU, a polarization member PU, and a cover window CW.

[0159] The polarization member PU may be located between the input sensing layer TU and the cover window CW, instead of Figure 8The color filter member CU. The polarization member PU includes a polarization layer POL, and as described above, the polarization layer POL may include a linear polarizer and a phase retarder. The polarization layer POL may include a phase retarder, and thus the phase of the light may be changed. For example, the polarization layer POL may change light that vibrates up and down or light that vibrates left and right into right-handed circularly polarized light or left-handed circularly polarized light, and may change right-handed circularly polarized light or left-handed circularly polarized light into light that vibrates up and down or light that vibrates left and right. In addition, the polarization layer POL may include a linear polarizer, and thus light may be selectively transmitted. For example, the polarization layer POL may transmit light that vibrates up and down or light that vibrates left and right. Therefore, the polarization layer POL may be used as an anti-reflection layer that reduces external light reflection to increase contrast and visibility.

[0160] The input sensing layer TU may include a first conductive layer MTL1, a first inorganic insulating layer IL1 on the first conductive layer MTL1, a second conductive layer MTL2 on the first inorganic insulating layer IL1, and a second inorganic insulating layer IL2 on the second conductive layer MTL2. The first conductive layer MTL1 and the second conductive layer MTL2 may correspond to Figure 6 The first sensor portion SP1 may not overlap with the emission region and may overlap with the non-emission region. The first conductive layer MTL1 and the second conductive layer MTL2 may not overlap with the first emission region EA1 and / or the first sensing region SA1. That is, the first conductive layer MTL1 and the second conductive layer MTL2 may overlap with the bank layer 109 and / or the light blocking layer BM.

[0161] In other words, the first conductive layer MTL1 and the second conductive layer MTL2 may have openings overlapping the first emission area EA1 and the first sensing area SA1. For example, the first conductive layer MTL1 may include an opening corresponding to the first emission area EA1 and a first conductive layer opening MOP1 corresponding to the first sensing area SA1. The second conductive layer MTL2 may include an opening corresponding to the first emission area EA1 and a second conductive layer opening MOP2 corresponding to the first sensing area SA1. That is, each of the first conductive layer opening MOP1 and the second conductive layer opening MOP2 may overlap with the second bank layer opening LOP2.

[0162] exist Fig. 9 and Fig.10 In the display device 1 shown in FIG. , by arranging the polarization member PU instead of ( Figure 8 ) the color filter member CU, the convex light transmitting portion CP may be disposed in the first conductive layer opening MOP1 or the second conductive layer opening MOP2.

[0163] Reference Fig. 9In some embodiments, the area of ​​the second conductive layer opening MOP2 may be smaller than the area of ​​the first conductive layer opening MOP1. That is, the second conductive layer MTL2 of the input sensing layer TU may protrude more toward the first sensing area SA1 than the first conductive layer MTL1. In other words, a portion of the second conductive layer MTL2 may protrude beyond the bank layer 109, and therefore, the area of ​​the second conductive layer opening MOP2 may be smaller than the area of ​​the second bank layer opening LOP2. Fig. 9 In the display device 1 shown in , the convex light transmission portion CP may be disposed in the second conductive layer opening MOP2, and the second inorganic insulating layer IL2 may cover the convex light transmission portion CP.

[0164] Next, refer to Fig.10 According to some embodiments, the area of ​​the first conductive layer opening MOP1 may be smaller than the area of ​​the second conductive layer opening MOP2. That is, the first conductive layer MTL1 of the input sensing layer TU may protrude more toward the first sensing area SA1 than the second conductive layer MTL2. In other words, a portion of the first conductive layer MTL1 may protrude beyond the bank layer 109, and therefore, the area of ​​the first conductive layer opening MOP1 may be smaller than the area of ​​the second bank layer opening LOP2. Fig.10 In the display device 1 shown in , the convex light transmission portion CP may be disposed in the first conductive layer opening MOP1, and the first inorganic insulating layer IL1 may cover the convex light transmission portion CP.

[0165] Arrange in Fig. 9 and Fig.10 The convex light transmission part CP in the display device 1 is a colorless transmission layer having no color in any visible wavelength band and can be Figure 8 The cladding layer OC includes the same material. For example, the convex light transmitting portion CP may include an organic material such as acrylic resin, benzocyclobutene (BCB), or hexamethyldisiloxane (HMDSO).

[0166] The convex light transmission part CP may include a convex upper surface. For example, the lower surface of the convex light transmission part CP facing the substrate 100 may be flat, and the upper surface facing the opposite side of the substrate 100 may include a convex surface protruding beyond the second conductive layer MTL2 or the first conductive layer MTL1. In other words, based on the thickness direction of the substrate 100, the cross-section of the convex light transmission part CP may have a shape that becomes thicker toward the center of the convex light transmission part CP, and therefore, the central portion of the convex light transmission part CP may be thicker than the second conductive layer MTL2 or the first conductive layer MTL1. When the above-mentioned convex light transmission part CP has a higher refractive index than the surrounding organic material, the convex light transmission part CP may substantially function as a convex lens. According to some embodiments, the refractive index of the convex light transmission part CP may be higher than the refractive index of each of the first inorganic insulating layer IL1 and the second inorganic insulating layer IL2 by about 0.1 to about 0.3.

[0167] Because the convex light transmission part CP disposed above the first light receiving element PD1 has a convex upper surface, light reflected by an object and incident again on the display device 1 may be refracted at the upper surface of the convex light transmission part CP and collected toward the first light receiving element PD1. Fig. 9 and Fig.10 As shown in , the light reflected by the object and entering the display device 1 may include first light L1 and L1' incident at an angle toward the upper surface of the convex light transmission part CP. The first light L1 and L1' may be refracted at an interface between the convex light transmission part CP and the first inorganic insulating layer IL1 or at an interface between the convex light transmission part CP and the second inorganic insulating layer IL2 to have a changed path, and the refracted first light L1 and L1' may be extracted substantially in a third direction (direction z) and enter the first light receiving element PD1 as second light L2 and L2'.

[0168] In addition, the capture area, which is an area capable of receiving light into the first light receiving element PD1, can be reduced according to the refraction phenomenon of light incident on the above-mentioned convex light transmission portion CP. Fig. 9 and Fig.10In the display device 1 shown in , light can be gathered by the convex light transmission part CP with a convex lens shape to reduce the capture area, and therefore, there may be no overlap problem between the capture areas of the light receiving elements adjacent to each other. In particular, the convex light transmission part CP can be filled in the first conductive layer opening MOP1 or the second conductive layer opening MOP2, and therefore, the size of the capture area can be adjusted by adjusting the first conductive layer opening MOP1 or the second conductive layer opening MOP2. As a result, in the display device 1 according to some embodiments, the convex light transmission part CP can be arranged above the first light receiving element PD1 to reduce the capture area and also increase the light receiving efficiency, thereby relatively improving the light detection capability of the first light receiving element PD1 and preventing or reducing defects such as image blur.

[0169] although Fig. 9 and Fig.10 The display device 1 shown in FIG. 1 has a structure in which the convex light transmission part CP is arranged in the first conductive layer opening MOP1 or the second conductive layer opening MOP2, but one or more embodiments are not limited thereto. That is, the convex light transmission part CP may be arranged in both the first conductive layer opening MOP1 and the second conductive layer opening MOP2 to adjust the capture area by using each of the first conductive layer opening MOP1 and the second conductive layer opening MOP2.

[0170] In the display device according to one or more of the above embodiments, by arranging the convex light transmission portion above the light receiving element, the detection capability of the light receiving element can be relatively improved. However, the above features are merely examples, and the embodiments according to the present disclosure are not limited to these features.

[0171] It should be understood that the embodiments described herein should be considered as illustrative only and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered as being applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope defined by the appended claims and their equivalents.

Claims

1. A display device, wherein: The display device comprises: a substrate having an emitting region and a sensing region; a light emitting element on the substrate and overlapping the emitting region; a light receiving element on the substrate and overlapping the sensing area; an upper layer, which is above the light emitting element and the light receiving element and includes a sensing opening overlapping the light receiving element; and The convex light transmitting portion fills the sensing opening and includes a convex upper surface.

2. The display device according to claim 1, wherein: The upper layer is a light blocking layer including a light blocking material, wherein the light blocking layer includes a first light blocking layer opening overlapping the light emitting element and a second light blocking layer opening overlapping the light receiving element, The sensing opening is an opening of the second light blocking layer, and the convex light transmitting portion is in the opening of the second light blocking layer.

3. The display device according to claim 2, wherein: The display device further includes a color filter layer filling the opening of the first light blocking layer, The color filter layer includes a first color filter, a second color filter, and a third color filter configured to transmit light of different colors from each other.

4. The display device according to claim 3, wherein: The convex light transmitting portion includes a same material as at least one of the first color filter, the second color filter, and the third color filter.

5. The display device according to claim 3, wherein: Based on the thickness direction of the substrate, the cross section of the convex light transmission portion has a shape that becomes thicker toward the center of the convex light transmission portion, Wherein, a central portion of the convex light transmitting portion is thicker than the light blocking layer.

6. The display device according to claim 3, wherein: The display device further includes a cladding layer over the light blocking layer and the color filter layer. Wherein, the refractive index of the convex light transmitting portion is higher than the refractive index of the cladding layer.

7. The display device according to claim 1, wherein: The display device further includes an input sensing layer above the light emitting element and the light receiving element, The input sensing layer includes a first conductive layer, a first inorganic insulating layer on the first conductive layer, a second conductive layer on the first inorganic insulating layer, and a second inorganic insulating layer on the second conductive layer. wherein the first conductive layer includes a first conductive layer opening overlapping the light receiving element, and the second conductive layer includes a second conductive layer opening overlapping the light receiving element, The upper layer is at least one of the first conductive layer and the second conductive layer.

8. The display device according to claim 7, wherein: The upper layer is the first conductive layer, the sensing opening is the first conductive layer opening, and the convex light transmitting portion is arranged in the first conductive layer opening.

9. The display device according to claim 8, wherein: The first inorganic insulating layer covers the convex light transmitting portion.

10. The display device according to claim 8, wherein: The convex light transmitting portion has a higher refractive index than that of the first inorganic insulating layer.

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