Display device

Abstract

The display device includes: a display panel including a first region and a second region; and a sensing module overlapping a first region of the display panel, where the first region of the display panel includes: a plurality of pixels; a diffusion pattern disposed between the plurality of pixels; and a planarization layer disposed on the diffusion pattern, and a refractive index of the diffusion pattern and a refractive index of the planarization layer are different from each other.

Description

Technical Field

[0001] The embodiments relate to display devices. Background Technology

[0002] The display device can use pixels (or pixel circuits) to display images. The display device includes an infrared sensor on the bezel (or boundary) on the front of the display device (e.g., the side where the image is displayed), and the infrared sensor can be used to identify objects. For example, the display device can use the infrared sensor to transmit infrared light, receive reflected light from an object, calculate the distance between the display device and the object based on the intensity of the reflected light, and, if the distance is within a certain range, the display device may not display an image.

[0003] Meanwhile, as the bezels of display devices become thinner, users can fix or focus their gaze on the image (or the screen of the display device). Recently, research and development are underway on front display technologies that eliminate the bezel in front of the display device, reposition infrared sensors located on the front (or on the bezel), and display images across the entire front of the display device. Summary of the Invention

[0004] The embodiments provide a display device with improved sensing module performance.

[0005] However, the embodiments are not limited to those set forth herein. The above and other embodiments will become more apparent to those skilled in the art upon reference to the following detailed description of the present disclosure.

[0006] The display device according to an embodiment includes: a display panel including a first region and a second region; and a sensing module overlapping the first region of the display panel, wherein the first region of the display panel includes: a plurality of pixels; a diffusion pattern disposed between the plurality of pixels; and a planarization layer disposed on the diffusion pattern, wherein the refractive index of the diffusion pattern and the refractive index of the planarization layer are different from each other.

[0007] The refractive index of the diffusion pattern can be less than that of the planarization layer.

[0008] The refractive index of the diffusion pattern can be greater than that of the planarization layer.

[0009] The diffusion pattern may not overlap with multiple pixels.

[0010] The diffusion pattern may not be set in the second zone.

[0011] The planar area of ​​a diffusion pattern can be smaller than the planar area of ​​each of the multiple pixels.

[0012] In the first unit area, the number of diffusion patterns can be greater than the number of pixels.

[0013] The planar shape of the diffusion pattern can be dot-like.

[0014] The planar shape of the diffusion pattern can be strip-shaped.

[0015] The planar shape of the diffusion pattern can be wavy.

[0016] The cross-section of the diffusion pattern can be circular.

[0017] The radius of the bottom surface of the diffusion pattern and the height of the diffusion pattern can be approximately equal to each other.

[0018] The height of the diffusion pattern can be greater than the radius of the bottom surface of the diffusion pattern.

[0019] The radius of the bottom surface of the diffusion pattern can be greater than the height of the diffusion pattern.

[0020] Light emitted from the sensing module can diffuse at the interface between the diffusion pattern and the planarization layer.

[0021] The sensing module can be an infrared sensing module.

[0022] A display device according to another embodiment includes: a display panel including a first region and a second region; and a sensing module overlapping the first region of the display panel, wherein the first region of the display panel includes a pixel region having a plurality of pixels and a refractive region having a plurality of diffusion patterns and a planarization layer, the plurality of pixels not being disposed in the refractive region, and the refractive indices of the diffusion patterns and the planarization layer being different from each other.

[0023] The planar shape of at least one of the multiple diffusion patterns can be one of a dot shape, a strip shape, and a wave shape.

[0024] At least one of the multiple diffusion patterns may have a circular cross-section.

[0025] Light emitted from the sensing module can diffuse at the interface of at least one of the multiple diffusion patterns with the planarization layer.

[0026] According to an embodiment, a display device with improved sensing module performance is provided. Attached Figure Description

[0027] Figure 1 and Figure 2 This is a schematic diagram of a display device according to an embodiment.

[0028] Figure 3 This is a schematic plan view of the pixel arrangement in the second region.

[0029] Figure 4 It is intercepted along line IV-IV'. Figure 3A schematic cross-sectional view.

[0030] Figure 5 This is a schematic plan view of the pixel arrangement in the first area.

[0031] Figure 6 It is intercepted along line VI-VI'. Figure 5 A schematic cross-sectional view.

[0032] Figure 7 Showing relative to, for example Figure 6 The schematic cross-section shows the light diffusion path.

[0033] Figure 8 As shown in another embodiment Figure 6 A schematic cross-section.

[0034] Figure 9 Showing has Figure 8 The diffusion simulation results of the diffusion pattern of the shape.

[0035] Figure 10 As shown in another embodiment Figure 6 A schematic cross-section.

[0036] Figure 11 Showing has Figure 10 The diffusion simulation results of the diffusion pattern of the shape.

[0037] Figure 12 As shown in another embodiment Figure 6 A schematic cross-section.

[0038] Figure 13 Showing has Figure 12 The diffusion simulation results of the diffusion pattern of the shape.

[0039] Figure 14 As shown in another embodiment Figure 6 A schematic cross-section.

[0040] Figure 15 Showing has Figure 14 The diffusion simulation results of the diffusion pattern of the shape.

[0041] Figure 16 Shown in including having with Figure 8 The diffusion simulation results in a display device with a diffusion pattern of similar shape, wherein the refractive index of the diffusion pattern is higher than that of the planarization layer.

[0042] Figure 17 Shown in including having with Figure 10 The diffusion simulation results in a display device with a diffusion pattern of similar shape, wherein the refractive index of the diffusion pattern is higher than that of the planarization layer.

[0043] Figure 18 Showing a different embodiment with Figure 5 The same area.

[0044] Figure 19 Showing a different embodiment with Figure 5 The same area.

[0045] Figure 20 Showing a different embodiment with Figure 5 The same area.

[0046] Figure 21 Showing a different embodiment with Figure 18 The same area.

[0047] Figure 22 Showing a different embodiment with Figure 19 The same area. Detailed Implementation

[0048] In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of various embodiments or implementations of the invention. As used herein, the terms “embodiment” and “implementation” are interchangeable terms as non-limiting examples of the apparatuses or methods disclosed herein. However, it will be apparent that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. These various embodiments are not necessarily exclusive, nor are they intended to limit this disclosure. For example, the specific shape, configuration, and characteristics of an embodiment may be used or implemented in another embodiment.

[0049] Unless otherwise stated, the embodiments shown are to be understood as providing features of the invention. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects of various embodiments (hereinafter individually or collectively referred to as “elements”) may be combined, separated, interchanged and / or rearranged in other ways without departing from the scope of the invention.

[0050] The use of crosshairs and / or shading in the accompanying drawings is generally provided to clearly define the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for a particular material, material properties, size, proportion, commonalities between the elements shown, or any other characteristics, properties, etc., of the elements. Furthermore, the dimensions and relative dimensions of elements may be exaggerated in the drawings for clarity and / or descriptive purposes. When embodiments can be implemented differently, the specific process sequence may be performed differently than the described sequence. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Moreover, the same reference numerals denote the same elements.

[0051] When a component or layer is referred to as being "on" another component or layer, "connected to" another component or layer, or "coupled to" another component or layer, the component or layer may be directly on, directly connected to, or directly coupled to the other component or layer, or an intermediary component or layer may be present. However, when a component or layer is referred to as being "directly on" another component or layer, "directly connected to," or "directly coupled to" another component or layer, an intermediary component or layer is not present. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection with or without an intermediary component. Furthermore, the axes of the first direction D1, the second direction D2, and the third direction D3 are not limited to the three axes of a Cartesian coordinate system (such as the X, Y, and Z axes) and can be interpreted in a broader sense. For example, the axes of the first direction D1, the second direction D2, and the third direction D3 can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of A and B" can be understood to mean only A, only B, or any combination of A and B. Furthermore, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items.

[0052] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0053] For descriptive purposes, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein to describe the relationship of one element to another (or multiple elements) as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to cover different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features will subsequently be oriented “above” said other elements or features. Thus, the term “below” can cover both above and below orientations. Furthermore, the device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and in such cases, the spatial relative terms used herein should be interpreted accordingly.

[0054] The descriptive terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” as used herein are intended to include the plural forms as well. Furthermore, when used in this specification, the terms “comprises,” “comprising,” and / or “includes,” indicate the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and thus to explain inherent deviations in measurements, calculated values, and / or provided values ​​that would be recognized by those skilled in the art.

[0055] Various embodiments are described herein with reference to cross-sectional and / or exploded views as schematic diagrams of examples and / or intermediate structures. Therefore, variations in the shapes illustrated will be expected due to factors such as manufacturing techniques and / or tolerances. Consequently, the embodiments disclosed herein should not necessarily be construed as limited to the specific shapes of the areas shown, but will include deviations in shape due to factors such as manufacturing. In this way, the areas shown in the figures may be schematic in nature and the shapes of these areas may not reflect the actual shapes of the areas of the device, and thus are not necessarily intended to be limiting.

[0056] As is customary in the art, some embodiments are described and illustrated in the accompanying drawings in terms of functional blocks, units, and / or modules. Those skilled in the art will appreciate that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuitry such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, and wire connections, which can be formed using semiconductor-based manufacturing techniques or other manufacturing techniques. Where blocks, units, and / or modules are implemented by microprocessors or other similar hardware, they can be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and optionally can be driven by firmware and / or software. It is also contemplated that each block, unit, and / or module can be implemented by dedicated hardware, or can be implemented by a combination of dedicated hardware for performing some functions and processors (e.g., one or more programmed microprocessors and associated circuitry) for performing other functions. Furthermore, without departing from the scope of the invention, each block, unit, and / or module of some embodiments may be physically separated into two or more interacting and discrete blocks, units, and / or modules. Furthermore, without departing from the scope of the invention, blocks, units, and / or modules of some embodiments may be physically combined into more complex blocks, units, and / or modules.

[0057] In the following description, a display device according to an embodiment will be described with reference to the accompanying drawings. Figure 1 and Figure 2 This is a schematic diagram of a display device 1000 according to an embodiment.

[0058] Reference Figure 1 The display device 1000 according to the embodiment may include a display panel 2000 and a sensing module 1200.

[0059] The display panel 2000 may be an organic light-emitting panel including organic light-emitting elements. The display panel 2000 may include a first region A1 that overlaps with the sensing module 1200 and a second region A2 that does not overlap with the sensing module 1200.

[0060] The display panel 2000 can display images and can display images on the entire front surface of the display panel 2000 (e.g., such as...). Figure 2 The display panel 2000 shown displays an image on its surface in the first direction D1. For example, the display panel 2000 may not be included in the front bezel or non-display area.

[0061] The sensing module 1200 can be disposed on the rear surface of the display panel 2000, for example, on the surface of the display panel 2000 in the direction opposite to the first direction D1. For example, the sensing module 1200 can be disposed on the display panel 2000 and the housing 1400 (or cover) (see...). Figure 2Between. For example, the housing 1400 forms the external shape of the display device 1000 and can protect internal components such as batteries and memory devices from external stresses.

[0062] The sensing module 1200 may be an infrared sensing module. However, the embodiments are not limited to this.

[0063] Reference Figure 2 When the sensing module 1200 is an infrared sensing module, it can transmit a first infrared light L1, receive a second infrared light L2, and identify an object 3000 based on changes in the second infrared light L2. For example, the first infrared light L1 can travel (or be transmitted) in a first direction D1 and can penetrate the first area A1 of the display panel 2000. The second infrared light L2 may include reflected light from the first infrared light L1 that has been reflected by the object 3000, can travel (or be transmitted) in a direction opposite to the first direction D1, and can penetrate the first area A1 of the display panel 2000.

[0064] Pixels can be disposed in both the first region A1 and the second region A2. For example, since no separate opening for light emission is provided in the first region A1, which overlaps with the sensing module 1200, the infrared light of the sensing module 1200 may need to penetrate the display panel 2000 for the effective operation of the sensing module 1200. This can be achieved by using a diffusion pattern 520 (see...) Figure 5 The light from the sensing module 1200 is effectively diffused and emitted in the area of ​​the unpositioned pixel in the first region A1 to characterize the display device 1000 according to the embodiment (see [link]). Figure 1 The specific structure will be described below with reference to the attached diagram.

[0065] Figure 3 It is Zone A2 (see section 2) Figure 1 A schematic plan view of the pixel arrangement. Figure 4 It is intercepted along line IV-IV'. Figure 3 A schematic cross-sectional view. (Refer to...) Figure 3 The first pixel PX1, the second pixel PX2, and the third pixel PX3 can be set in the second area A2, and the diffusion pattern 520 (see...) Figure 5 This is not set in area A2 of zone 2. (See reference...) Figure 4The display device according to an embodiment may include a substrate SUB and a transistor TFT disposed on the substrate SUB. An insulating layer VIA may be disposed on the transistor TFT, and a first electrode 191 may be disposed on the insulating layer VIA. A partition wall 350 may be disposed on the first electrode 191, and the partition wall 350 may include an opening 355 overlapping with the first electrode 191. A light-emitting layer 360 may be disposed in the opening 355. A second electrode 270 may be disposed on the partition wall 350 and the light-emitting layer 360. The first electrode 191, the light-emitting layer 360, and the second electrode 270 may form a light-emitting element LED. The overlapping portion of the first electrode 191, the light-emitting layer 360, and the second electrode 270 may be a light-emitting region in which light emission substantially occurs.

[0066] The encapsulation layer 400 can be disposed on the light-emitting element LED. According to an embodiment, the encapsulation layer 400 can contact (or be in contact with) the second electrode 270 or can be spaced apart from the second electrode 270. The encapsulation layer 400 can be a thin-film encapsulation layer in which inorganic and organic films are stacked, and can include three layers formed of an inorganic film, an organic film, and an inorganic film. According to an embodiment, a capping layer and a functional layer can be disposed between the second electrode 270 and the encapsulation layer 400.

[0067] A planarization layer 510 may be disposed on the encapsulation layer 400. For example, the planarization layer 510 may be a high refractive index layer. For example, the refractive index of the planarization layer 510 may be greater than about 1.6, and for example, greater than about 1.8. The planarization layer 510 may comprise ceramic materials such as TiO2, ZrO2, ZnO, or polymeric materials containing such ceramic materials, and may be formed by solution processes, chemical vapor deposition (CVD), sputtering, etc. The planarization layer 510 may comprise materials such as SiO2. x N y SiN x AlO x Inorganic materials such as ZnS can be formed via thermal deposition, CVD, and sputtering. In another example, planarization layer 510 may comprise a monomolecular organic material formed via thermal deposition and solution processes. In another example, planarization layer 510 may comprise a high-refractive-index polymer material, such as polyethylene naphthalate (PEN) or polyimide (PI), formed via solution processes and CVD. Planarization layer 510 may comprise a composite material comprising one or more of the materials described above.

[0068] In another embodiment, the planarization layer 510 may be a low refractive index layer. The refractive index of the planarization layer 510 may be less than about 1.5. The planarization layer 510 may comprise polymeric materials such as acrylic resins, methacrylic resins, polyisoprene, vinyl resins, epoxy resins, urethane resins, cellulose resins, siloxane resins, polyimide resins, polyamide resins, and perylene resins, and the planarization layer 510 may be formed by thermal deposition or solution processes. In another example, the planarization layer 510 may comprise inorganic materials such as SiO2, MgF2, and LiF, and may be formed by thermal deposition, CVD, and sputtering. The planarization layer 510 may comprise a composite material comprising one or more of the materials described above.

[0069] Figure 5 It is Zone A1 (see section 1) Figure 1 A schematic plan view of the pixel arrangement in (). Figure 6 It is intercepted along line VI-VI'. Figure 5 A schematic cross-sectional view. (Refer to...) Figure 5 The first pixel PX1, the second pixel PX2, and the third pixel PX3 can be set in the first area A1. For example, the diffusion pattern 520 can be set between the first pixel PX1, the second pixel PX2, and the third pixel PX3. (See reference...) Figure 6 The display device according to the embodiment may include a substrate SUB and an encapsulation layer 400 disposed on the substrate SUB. Figure 6 The cross-section is without pixels PX1, PX2, and PX3 (see...) Figure 5 The cross-section of the portion, and the light-emitting element LED (see Figure 4 (This was not shown.) However, Figure 5 The cross-sections of pixels PX1, PX2, and PX3 in the settings can be compared with... Figure 4 The cross-sections are the same. The encapsulation layer 400 can be a thin film encapsulation layer in which inorganic and organic films are stacked, and can include three layers formed of inorganic film, organic film and inorganic film.

[0070] A diffusion pattern 520 may be disposed on the encapsulation layer 400. A planarization layer 510 may be disposed on the diffusion pattern 520. The refractive index of the diffusion pattern 520 may differ from that of the planarization layer 510. If the planarization layer 510 has a high refractive index, the diffusion pattern 520 may have a low refractive index. If the refractive index of the planarization layer 510 is greater than or equal to about 1.6, the refractive index of the diffusion pattern 520 may be less than or equal to about 1.5. For example, the diffusion pattern 520 may comprise polymeric materials such as acrylic resins, methacrylic resins, polyisoprene, vinyl resins, epoxy resins, urethane resins, cellulose resins, siloxane resins, polyimide resins, polyamide resins, and perylene resins, and the diffusion pattern 520 may be formed by thermal deposition or solution processing. In another example, the diffusion pattern 520 may comprise inorganic materials such as SiO2, MgF2, and LiF, and may be formed by thermal deposition, CVD, and sputtering. The diffusion pattern 520 may include a composite material comprising one or more of the materials described above.

[0071] When the refractive index of the planarization layer 510 is less than or equal to about 1.5, the refractive index of the diffusion pattern 520 can be greater than or equal to about 1.6. For example, the diffusion pattern 520 may comprise ceramic materials such as TiO2, ZrO2, ZnO, or polymeric materials containing such ceramic materials, and can be formed by solution processing, CVD, sputtering, etc. The diffusion pattern 520 may comprise materials such as SiO2. x N y SiN x AlO x Inorganic materials such as ZnS can be formed via thermal deposition, CVD, and sputtering. In another example, diffusion pattern 520 may include monomolecular organic materials formed via thermal deposition and solution processes. In another example, diffusion pattern 520 may include high-refractive-index polymer materials, such as polyethylene naphthalate (PEN) or polyimide (PI), formed via solution processes and CVD. Diffusion pattern 520 may include composite materials comprising one or more of the materials described above.

[0072] Reference Figure 5 and Figure 6 The diffusion pattern 520 can be set in the areas where pixels PX1, PX2, and PX3 are not set. Due to the difference in refractive index with the planarization layer 510, the diffusion pattern 520 can transmit light from the underlying sensing module 1200 (see below). Figure 1 (Light diffusion) Figure 7 Showing relative to, for example Figure 6 The schematic cross-section illustrates the light diffusion path. For example... Figure 7As shown, light emitted from the sensing module (e.g., infrared light) can be diffused as it passes through the diffusion pattern 520. Therefore, the detection performance and efficiency of the sensing module can be improved.

[0073] Reference Figure 5 The planar area (or planar size) of each diffusion pattern 520 can be smaller than the planar area (or planar size) of the smallest pixel among pixels PX1, PX2, and PX3. If the planar area of ​​the diffusion pattern 520 is larger than the planar area of ​​the smallest pixel among pixels PX1, PX2, and PX3, there may be a problem of reduced diffusion efficiency. For example, in a given repeating unit (e.g., a unit region), the total number of diffusion patterns 520 can be greater than the total number of pixels PX1, PX2, and PX3. This is the effective diffusion range of the diffusion pattern 520.

[0074] exist Figure 6 and Figure 7 In the diagram, the shape of the diffusion pattern 520 is shown as a quadrilateral in the cross-section, but this is just an example and the shape of the cross-section of the diffusion pattern 520 can vary.

[0075] For example, the cross-section of the diffusion pattern 520 can be circular. Figure 8 , Figure 10 , Figure 12 and Figure 14 As shown Figure 6 A schematic cross-section for another embodiment. Besides the shape of the diffusion pattern 520, Figure 8 , Figure 10 , Figure 12 and Figure 14 and Figure 6 Same or similar. For ease of description, descriptions of identical components have been omitted.

[0076] like Figure 8 As shown, the cross-sectional shape of the diffusion pattern 520 can be circular. For example, the radius R1 of the bottom surface of the diffusion pattern 520 and the height H1 of the diffusion pattern 520 can be the same. When the cross-sectional shape of the diffusion pattern 520 is circular, light can be diffused better. Figure 9 Showing has Figure 8 The diffusion simulation results for the diffusion pattern of shape 520. (Refer to...) Figure 9 It can be confirmed that the diffusion occurred uniformly.

[0077] Figure 10 As shown Figure 8 A schematic cross-section relative to another embodiment. (Refer to...) Figure 10 In the display device according to the embodiment, the height H1 of the diffusion pattern 520 may be greater than the radius R1 of the bottom surface of the diffusion pattern 520.Figure 11 Showing has Figure 10 The diffusion simulation results for the diffusion pattern of shape 520. (Refer to...) Figure 11 It can be confirmed that the diffusion occurred uniformly.

[0078] Figure 12 As shown Figure 8 A schematic cross-section relative to another embodiment. (Refer to...) Figure 12 According to the embodiment, the diffusion pattern 520 may have a radius R1 of the bottom surface that is greater than the height H1 of the diffusion pattern 520. Figure 13 Showing has Figure 12 The diffusion simulation results show the shape of the diffusion pattern. (Refer to...) Figure 13 It can be confirmed that diffusion occurred uniformly. However, compared with... Figure 8 and Figure 10 Compared to the previous embodiment, it can be confirmed that diffusion occurred within a narrow range.

[0079] Figure 14 As shown Figure 8 A schematic cross-section relative to another embodiment. (Refer to...) Figure 14 According to the embodiment, the diffusion pattern 520 may have a radius R1 of the bottom surface that is greater than the height H1 of the diffusion pattern 520. Figure 15 Showing has Figure 14 The diffusion simulation results for the diffusion pattern of shape 520. (Refer to...) Figure 15 It can be confirmed that diffusion occurred uniformly. However, compared with... Figure 8 and Figure 10 Compared to the previous embodiment, it can be confirmed that diffusion occurred within a narrow range.

[0080] Figure 8 , Figure 10 , Figure 12 , Figure 14 Implementation examples and Figure 9 , Figure 11 , Figure 13 and Figure 15 The simulation results are for an embodiment simulating the case where the refractive index of the diffusion pattern 520 is lower than that of the planarization layer 510. However, diffusion can be performed when the refractive index of the diffusion pattern 520 is higher than that of the planarization layer 510.

[0081] Figure 16 Shown in including having with Figure 8 The diffusion simulation results in a display device with a diffusion pattern 520 of similar shape, wherein the refractive index of the diffusion pattern 520 is higher than that of the planarization layer 510 (see...). Figure 8 The refractive index of ( ). Refer to Figure 16It has been confirmed that diffusion is performed when the refractive index of the diffusion pattern 520 is higher than that of the planarization layer 510.

[0082] Figure 17 Shown in including having with Figure 10 The diffusion simulation results in a display device with a diffusion pattern 520 of similar shape, wherein the refractive index of the diffusion pattern 520 is higher than that of the planarization layer 510 (see...). Figure 10 The refractive index of ( ). Refer to Figure 17 It has been confirmed that diffusion is performed when the refractive index of the diffusion pattern 520 is higher than that of the planarization layer 510.

[0083] although Figure 5 The diagram shows the case where the planar shape of the diffusion pattern 520 is a dot shape, but the planar shape of the diffusion pattern 520 can be varied.

[0084] Figure 18 Showing a different embodiment with Figure 5 Same area. (Refer to...) Figure 18 Except that the diffusion pattern 520 has a flat strip shape, the display device according to the embodiment and the one according to the embodiment Figure 5 The display devices in the embodiments are the same or similar. For ease of description, descriptions of identical components are omitted. See also Figure 18 The diffusion pattern 520 can have a strip shape extending in one direction. For example, Figure 18 The cross-section of the diffusion pattern 520 can have, for example, Figure 6 The quadrilateral shape shown or as Figure 8 , Figure 10 , Figure 12 and Figure 14 The circular shapes shown have various radii and heights.

[0085] Figure 19 Showing a different embodiment with Figure 5 Same area. (Refer to...) Figure 19 In addition to the diffusion pattern 520 having a planar wave shape, the display device according to the embodiment and the one according to the embodiment Figure 5 The display devices in the embodiments are the same or similar. For ease of description, descriptions of identical components are omitted. For example, Figure 19 The cross-section of the diffusion pattern 520 can have, for example, Figure 6 The quadrilateral shape shown or as Figure 8 , Figure 10 , Figure 12 and Figure 14 The circular shapes shown have various radii and heights.

[0086] In the previous embodiment, an embodiment was described in which a diffusion pattern 520 was set in the gap between pixels PX1, PX2 and PX3 in the first region A1. However, in another embodiment, the diffusion pattern 520 may be gathered and set in some areas of the first region A1.

[0087] Figure 20 Showing a different embodiment with Figure 5 Same area. (Refer to...) Figure 20 and combined Figure 5 The refractive region A3 of the diffusion pattern 520 is densely arranged within the first region A1. For example, pixels PX1, PX2, and PX3 may not be arranged within the refractive region A3, and the diffusion pattern 520 may be arranged together. The material, shape, and cross-section of the diffusion pattern 520 are the same as those described above, and therefore their descriptions are omitted for convenience.

[0088] Figure 21 Showing a different embodiment with Figure 18 Same area. (Refer to...) Figure 21 and combined Figure 18 The refractive region A3 of the diffusion pattern 520 is densely arranged within the first region A1. For example, pixels PX1, PX2, and PX3 may not be arranged within the refractive region A3, and the diffusion pattern 520 may be arranged together. The material, shape, and cross-section of the diffusion pattern 520 are the same as those described above, and therefore their descriptions are omitted for convenience.

[0089] Figure 22 Showing a different embodiment with Figure 19 Same area. (Refer to...) Figure 22 and combined Figure 19 The refractive region A3 of the diffusion pattern 520 is densely arranged within the first region A1. For example, pixels PX1, PX2, and PX3 may not be arranged within the refractive region A3, and the diffusion pattern 520 may be arranged together. The material, shape, and cross-section of the diffusion pattern 520 are the same as those described above, and therefore their descriptions are omitted for convenience.

[0090] As described above, the display device according to the embodiment may include a second region and a first region where a sensing module is disposed in the lower region, and a planarization layer and a diffusion pattern having a different refractive index from the planarization layer may be disposed in the first region. This diffusion pattern is disposed in the gaps between pixels and does not overlap with the pixels, and can promote the diffusion of light from the sensing module, thereby improving the operation of the sensing module.

[0091] In summarizing the detailed description, those skilled in the art will appreciate that many variations and modifications can be made to the embodiments without substantially departing from the principles, spirit, and scope of this disclosure. Therefore, the disclosed embodiments are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A display device, wherein, The display device includes: a display panel including a first area and a second area; and a sensing module overlapping the first area of the display panel, wherein the first area of the display panel includes: a plurality of pixels; a diffusion pattern disposed between the plurality of pixels; and a planarization layer disposed on the diffusion pattern, and a refractive index of the diffusion pattern and a refractive index of the planarization layer are different from each other. 2.The display device of claim 1, wherein, the refractive index of the diffusion pattern is less than the refractive index of the planarization layer. 3.The display device of claim 1, wherein, the refractive index of the diffusion pattern is greater than the refractive index of the planarization layer. 4.The display device of claim 1, wherein, the diffusion pattern does not overlap the plurality of pixels. 5.The display device of claim 1, wherein, the diffusion pattern is not disposed in the second area. 6.The display device of claim 1, wherein, a planar area of the diffusion pattern is less than a planar area of each of the plurality of pixels. 7.The display device of claim 1, wherein, in a unit area of the first area, a number of the diffusion pattern is more than a number of pixels. 8.The display device of claim 1, wherein, a planar shape of the diffusion pattern is a dot shape. 9.The display device of claim 1, wherein, a planar shape of the diffusion pattern is a strip shape. 10.The display device of claim 1, wherein, a planar shape of the diffusion pattern is a wave shape, and a cross section of the diffusion pattern has a circular shape.

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