Display Devices

Abstract

The present application relates to a display device. The display device includes a sensor having a detection electrode. An optical pattern layer is directly disposed on the sensor and includes a plurality of transmission portions and a light blocking portion. A display panel is disposed on the optical pattern layer. A minimum distance between the detection electrode and the light blocking portion is in a range of 1 micrometer to 5 micrometers.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority benefit of Korean Patent Application No. 10-2019-0096844 filed on August 8, 2019 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to a display device including a fingerprint recognition function. Background Art

[0004] The display device generates an image in a display area and may provide various functions for communicating with a user, such as providing visual information to the user or sensing input from the user. Some recent display devices include a function for detecting a user's fingerprint. The fingerprint recognition methods adopted include a capacitive method for detecting a change in capacitance formed between electrodes, an optical method for detecting incident light using an optical sensor, and an ultrasonic method for detecting vibrations by using a piezoelectric material. Some recent display devices include a detection unit for fingerprint recognition, which is provided on the rear surface of the display panel. Summary of the invention

[0005] Embodiments of the inventive concept provide a display device including a detection unit having improved fingerprint recognition sensitivity.

[0006] According to an embodiment of the present invention, a display device includes a sensor having a detection electrode. An optical pattern layer is disposed on the sensor and includes a plurality of transmission portions and a light blocking portion. A display panel is disposed on the optical pattern layer. A minimum distance between the detection electrode and the light blocking portion is in a range of 1 micrometer to 5 micrometers.

[0007] In an embodiment, the height of the light blocking portion may be 1 / tan(AG) times or more of the width of each of the plurality of transmissive portions and 5 times or less of the width of each of the plurality of transmissive portions, where AG may be an angle set by design conditions.

[0008] In an implementation, the optical pattern layer may further include a transmissive layer disposed between the plurality of transmissive portions and the sensor and between the light blocking portion and the sensor.

[0009] In an implementation, the transmission layer may include the same material as the plurality of transmission portions.

[0010] In an embodiment, an angle between a bottom surface of the light blocking portion and a side surface of the light blocking portion may be 85 degrees or more and 90 degrees or less or may be 90 degrees or more and 95 degrees or less.

[0011] In an implementation, a plurality of transmissive portions may be arranged along the first direction and the second direction on a plane, and the light blocking portion may surround the plurality of transmissive portions.

[0012] In an embodiment, the plurality of transmission portions may include a first transmission portion constituting a first transmission arrangement and a second transmission portion constituting a second transmission arrangement, wherein the first transmission portion and the second transmission portion may be arranged along a first direction, wherein the first transmission arrangement and the second transmission arrangement may be alternately arranged along a second direction intersecting the first direction, wherein a center of the first transmission portion may not overlap with a center of the second transmission portion in the second direction.

[0013] In an embodiment, the plurality of transmissive portions may include a central transmissive portion and six peripheral transmissive portions adjacent to the central transmissive portion and spaced apart from the central transmissive portion at the same interval.

[0014] In an embodiment, the display device may further include an additional optical pattern layer disposed on the optical pattern layer and including a plurality of additional transmission parts and additional light blocking parts.

[0015] In an implementation, each of the plurality of transmissive portions may extend along a first direction, and each of the plurality of additional transmissive portions may extend along a second direction intersecting the first direction.

[0016] In an embodiment, the detection electrode may overlap X transmission portions (X is a positive integer) among the plurality of transmission portions on a plane.

[0017] In an embodiment, the display panel may include: a base layer; a circuit layer, which is disposed on the base layer and includes a pixel circuit; and a light-emitting element layer, which is disposed on the circuit layer and includes a first electrode, a light-emitting layer, and a second electrode, wherein the first electrode and the second electrode may have transparency, and the first electrode may overlap with Y transmission parts of the multiple transmission parts (Y is a positive integer).

[0018] In an embodiment, the number of transmissive portions among the plurality of transmissive portions overlapping the detection electrode may be greater than the number of transmissive portions among the plurality of transmissive portions overlapping the first electrode.

[0019] In an implementation, the display device may further include an infrared filter disposed between the display panel and the optical pattern layer.

[0020] In an embodiment, an active area for displaying an image and a peripheral area surrounding the active area may be defined in the display panel, wherein a detection area for detecting biometric information may be defined in the sensor, wherein the detection area may overlap with the entire active area.

[0021] In an embodiment of the present inventive concept, a display device includes a detection unit having a sensor and an optical pattern layer, wherein the sensor includes a detection electrode, and the optical pattern layer is disposed on the sensor and includes a plurality of transmission parts and a light blocking part adjacent to the plurality of transmission parts. A display panel is disposed on the detection unit and includes a light emitting element layer having a first electrode, a light emitting layer, and a second electrode. Each of the first electrode and the detection electrode overlaps two or more of the plurality of transmission parts.

[0022] In an embodiment, a minimum distance between the detection electrode and the light blocking portion may be 1 micrometer or more and 5 micrometers or less.

[0023] In an implementation, the optical pattern layer may further include a transmission layer disposed between the plurality of transmission portions and the sensor and between the light blocking portion and the sensor, wherein the transmission layer may include the same material as the plurality of transmission portions.

[0024] In an embodiment, the height of the light blocking portion may be 1 / tan(AG) times or more of the width of each of the plurality of transmissive portions and may be 5 times or less of the width of each of the plurality of transmissive portions, where AG may be an angle set by design conditions, wherein the angle between the bottom surface of the light blocking portion and the side surface of the light blocking portion may be 85 degrees or more and 90 degrees or less or may be 90 degrees or more and 95 degrees or less.

[0025] In an embodiment, the plurality of transmissive portions may include a central transmissive portion and six peripheral transmissive portions adjacent to the central transmissive portion and spaced apart from the central transmissive portion at the same interval.

[0026] In an embodiment of the present invention, a display device includes a display panel having a plurality of pixel areas, the plurality of pixel areas including a first pixel area, a second pixel area, and a third pixel area. Each of the plurality of pixel areas has a pixel including a first electrode, a light emitting layer, and a second electrode. A detection unit is disposed below the display panel. The detection unit has a sensor including a detection element. The detection unit forms a detection area overlapping with the detection element and an effective detection area overlapping with an area where a transistor is electrically connected to the detection element. An optical pattern layer is disposed on the sensor and includes a plurality of transmission parts and a light blocking part adjacent to the plurality of transmission parts. The detection area overlaps with at least a portion of each of the plurality of transmission parts and the first pixel area, the second pixel area, and the third pixel area. The first electrode of the first pixel area, the second pixel area, and the third pixel area overlaps with the plurality of transmission parts. The area of ​​each of the first pixel area to the third pixel area is smaller than the area of ​​the detection area, and the number of transmission parts overlapping with the first electrode of the first pixel area, the second pixel area, and the third pixel area, respectively, is smaller than the number of transmission parts overlapping with the detection area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the embodiments of the inventive concept and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the inventive concept and together with the description are used to explain the principles of the inventive concept. In the drawings:

[0028] Figure 1 is a perspective view of a display device according to an embodiment of the inventive concept;

[0029] Figure 2 is an exploded perspective view of a display device according to an embodiment of the inventive concept;

[0030] Figure 3 is a cross-sectional view illustrating some components of a display device according to an embodiment of the inventive concept;

[0031] Figure 4 is a cross-sectional view of some components of a display device according to an embodiment of the inventive concept;

[0032] Figure 5 is a cross-sectional view of a display module according to an embodiment of the present inventive concept;

[0033] Figure 6 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept;

[0034] Figure 7 is a plan view of an optical pattern layer according to an embodiment of the present inventive concept;

[0035] Figure 8is a plan view of an optical pattern layer according to an embodiment of the present inventive concept;

[0036] Fig. 9 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept;

[0037] Fig.10 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept;

[0038] Fig.11 is a plan view of an optical pattern layer and an additional optical pattern layer according to an embodiment of the present inventive concept;

[0039] Fig.12 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept;

[0040] Fig.13 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept;

[0041] Fig.14 is a plan view showing a pixel region, an optical pattern layer, and a detection region of a display device according to an embodiment of the inventive concept; and

[0042] Fig.15 is a plan view illustrating a pixel region, an optical pattern layer, and a detection region of a display device according to an embodiment of the inventive concept. DETAILED DESCRIPTION

[0043] In this specification, when a component (or region, layer, part, etc.) is referred to as being "on" another component, "connected to" or "combined to" another component, this means that the component may be directly on, directly connected to or directly combined to the other component, or there may be an intervening component therebetween. When a component (or region, layer, part, etc.) is referred to as being "directly on" another component, "directly connected to" or "directly combined to" another component, this means that the component is directly on, directly connected to or directly combined to the other component, and there are no intervening components therebetween.

[0044] The same reference numerals denote the same elements. In addition, in the drawings, the thickness, proportion, and size of components are exaggerated for efficient description.

[0045] “And / or” includes all of one or more combinations defined by the relevant components.

[0046] It should be understood that the terms "first" and "second" are used herein to describe various components, but these components should not be limited by these terms. The above terms are only used to distinguish one component from another component. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, or a second component may be referred to as a first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0047] In addition, terms such as "below", "lower side", "upper", and "upper side" are used to describe the relationship of the configurations shown in the drawings. These terms are described as relative concepts based on the directions shown in the drawings.

[0048] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the inventive concept belongs. Generally, terms defined in dictionaries should be considered to have the same meaning as the contextual meaning of the relevant field, and should not be abnormally understood or construed as having an overly formal meaning unless clearly defined herein.

[0049] In various embodiments of the present inventive concept, the terms "comprises," "includes," "including," or "comprising" specify properties, regions, fixed numbers, steps, processes, elements, and / or components, but do not exclude other properties, regions, fixed numbers, steps, processes, elements, and / or components.

[0050] Hereinafter, embodiments of the inventive concept will be described with reference to the accompanying drawings.

[0051] Figure 1 is a perspective view of a display apparatus 1000 according to an embodiment of the inventive concept. Figure 2 is an exploded perspective view of a display apparatus 1000 according to an embodiment of the inventive concept.

[0052] Reference Figure 1 and Figure 2 , the display device 1000 may be a device activated according to an electrical signal and configured to generate an image for display to a user. Figure 1 The embodiment shown in includes a smart phone as the display device 1000, but the embodiment of the inventive concept is not limited thereto, and the display device 1000 may be a variety of different display devices. For example, in addition to large electronic devices such as televisions, monitors, or external billboards, the display device 1000 may also be a medium-sized electronic device such as a personal computer, a notebook computer, a personal digital terminal, a car navigation unit, a game console, a portable electronic device, or a camera. However, without departing from the scope of the inventive concept, the display device 1000 may be any other electronic device including a display.

[0053] The display device 1000 may display an image 1000-I on a display surface 1000-F. The image 1000-I may be viewed in a third direction DR3 perpendicular to the first direction DR1 and the second direction DR2. In an embodiment, the image 1000-I may include at least one still image and / or at least one dynamic image. Figure 1 , as an example of image 1000-I, a clock, calendar and temperature window and associated icons are shown. The display surface 1000-F on which the image 1000-I is displayed may correspond to the front surface of the display device 1000, and may correspond to the front surface of the window 100.

[0054] exist Figure 1 In the embodiment shown in , the front surface (or the upper surface in the third direction DR3) and the rear surface (or the lower surface in the third direction DR3) of each member are defined with reference to the direction in which the image 1000-I is displayed. The front surface and the rear surface are opposite to each other in the third direction DR3, and the normal direction of each of the front surface and the rear surface may be parallel to the third direction DR3. In this specification, "when viewed on a plane" may refer to "when viewed in the third direction DR3".

[0055] The display device 1000 according to an embodiment of the inventive concept can detect a user's input applied from the outside. The user's input includes various types of external inputs, such as touch, light, heat, pressure, etc. from a part of the user's body. In addition, according to the structure of the display device 1000, the display device 1000 can detect a user input applied to a side surface or a rear surface of the display device 1000. However, the embodiments of the inventive concept are not limited thereto.

[0056] The display device 1000 may detect a user's fingerprint 2000 applied from the outside. A fingerprint recognition area may be provided on the display surface 1000-F of the display device 1000. In an embodiment, the fingerprint recognition area may be provided in the entire area of ​​the transmission area 1000-T or in a partial area of ​​the transmission area 1000-T.

[0057] like Figure 2 As shown in the embodiment of the present invention, the display device 1000 may include a window 100, an anti-reflection panel 200, a display module 300, a detection unit 400, and a housing 500 sequentially stacked on each other in the third direction DR3. In an embodiment, the window 100 and the housing 500 may be combined to form the appearance of the display device 1000. Although Figure 1 to Figure 2 The embodiment shows the display device 1000 having a rectangular shape, but embodiments of the inventive concept are not limited thereto, and the display device 1000 may have various other shapes such as a circular shape, a spherical shape, a polygonal shape, and the like.

[0058] In an embodiment, the window 100 may include an optically transparent insulating material. For example, the window 100 may include glass or plastic. The window 100 may have a multi-layer structure or a single-layer structure. For example, the window 100 may include a plurality of plastic films bonded together with an adhesive, or may include a glass substrate and a plastic film bonded together with an adhesive.

[0059] As described above, the display surface 1000-F of the display device 1000 defines the front surface of the window 100. The transmissive region 1000-T may be an optically transparent region. For example, in an embodiment, the transmissive region 1000-T may be a region having a visible light transmittance of about 90% or more.

[0060] The frame area 1000-B may be an area having a lower light transmittance than the transmission area 1000-T. The frame area 1000-B defines the shape of the transmission area 1000-T. The frame area 1000-B may be adjacent to the transmission area 1000-T and may surround the transmission area 1000-T (e.g., in the first direction DR1 and the second direction DR2).

[0061] The border region 1000-B may have a predetermined color. The border region 1000-B may cover the peripheral region 300-N of the display module 300 to prevent the peripheral region 300-N from being visible from the outside. However, in another embodiment, the display device 1000 may not include the border region 1000-B.

[0062] The anti-reflection panel 200 may be disposed below the window 100. For example, Figure 2 As shown in the embodiment of the present invention, the anti-reflection panel 200 (for example, in the third direction DR3) is disposed directly below the window 100. The anti-reflection panel 200 reduces the reflectivity of external light incident from the upper side of the window 100. However, in another embodiment of the present inventive concept, the anti-reflection panel 200 may be omitted, or the anti-reflection panel 200 may be a configuration included in the display module 300.

[0063] The display module 300 is disposed below the anti-reflection panel 200. Figure 2 As shown in the embodiment of the present invention, the display module 300 can be directly disposed under the anti-reflection panel 200 (e.g., in the third direction DR3). The display module 300 can display the image 1000-I and detect external input. The display module 300 may include an active area 300-A and a peripheral area 300-N. The active area 300-A may be an area that can be activated according to an electrical signal.

[0064] In another embodiment, the active area 300-A may be an area that displays the image 1000-I and detects an external input at the same time. The transmissive area 1000-T of the display device 1000 may overlap with the active area 300-A of the display module 300 (for example, in the third direction DR3). In an embodiment, the transmissive area 1000-T may overlap with the entire area or at least a portion of the active area 300-A. Therefore, the user may view the image 1000-I or provide an external input through the transmissive area 1000-T. In an embodiment of the inventive concept, the area that displays the image 1000-I and the area that detects the external input may be separated from each other in the active area 300-A. However, the embodiments of the inventive concept are not limited to any one embodiment.

[0065] The peripheral area 300-N may be an area covered by the border area 1000-B. The peripheral area 300-N is adjacent to the active area 300-A. The peripheral area 300-N may surround the active area 300-A (e.g., in the first direction DR1 and the second direction DR2). A driving circuit, a driving wiring, etc. for driving the active area 300-A may be disposed in the peripheral area 300-N.

[0066] The detection unit 400 may be disposed below the display module 300. For example, Figure 2 As shown in the embodiment of , the detection unit 400 can be directly disposed under the display module 300 (for example, in the third direction DR3). The detection unit 400 can be a layer that detects the biometric information of the user. The detection unit 400 can detect the surface of the touch target. The surface can have surface uniformity, surface curved shape, etc. For example, in an embodiment in which the detection unit 400 detects the fingerprint 2000 of the user, the detection unit 400 can detect information on the surface of the user's finger, such as information about ridges and valleys.

[0067] The detection unit 400 may include a detection area 400-A and a non-detection area 400-N. The detection area 400-A may be an area activated according to an electrical signal. For example, the detection area 400-A may be an area for detecting biometric information. A driving circuit, a driving wiring, etc. for driving the detection area 400-A of the detection unit 400 may be disposed in the non-detection area 400-N.

[0068] In an embodiment of the present invention, the detection area 400-A may overlap with the entire portion of the active area 300-A of the display module 300 (for example, in the third direction DR3). In this embodiment, fingerprint recognition may be implemented in the entire active area 300-A. For example, the user's fingerprint 2000 may be recognized in the entire area of ​​the active area 300-A of the display module 300. However, the embodiments of the present invention are not limited thereto. For example, in another embodiment of the present invention, the detection unit 400 may overlap with only a portion of the active area 300-A.

[0069] The housing 500 is coupled to the window 100. The housing 500 includes a side wall extending in the third direction DR3 and a main surface extending in the first direction DR1 and the second direction DR2. The housing 500 is coupled to the window 100 to provide a predetermined internal space. The display module 300 and the detection unit 400 can be accommodated in the internal space. The housing 500 can stably protect the components of the display device 1000 accommodated in the internal space from external impacts. In an embodiment, the housing 500 may include a material having a relatively high rigidity. For example, the housing 500 may include a plurality of frames and / or plates having glass, plastic or metal or a combination thereof. However, embodiments of the inventive concept are not limited thereto.

[0070] A battery module for providing power for the overall operation of the display device 1000 may be disposed between the detection unit 400 and the housing 500 .

[0071] Figure 3 is a cross-sectional view of a partial configuration of a display device according to an embodiment of the inventive concept. Figure 3 is a schematic cross-sectional view of components constituting the display module 300 and the detection unit 400 .

[0072] Reference Figure 3 , the display module 300 may include a display panel 310 and an input detection layer 320 .

[0073] The display panel 310 may be a layer for providing an image. Figure 2 ) may correspond to the active area of ​​the display panel 310. In an embodiment, the detection area 400-A (see Figure 2 ) may overlap with the entire active area of ​​the display panel 310 (eg, in the third direction DR3).

[0074] The display panel 310 may include a base layer 311 , a circuit layer 312 , a light emitting element layer 313 , and an encapsulation layer 314 .

[0075] In an embodiment, the base layer 311 may include a synthetic resin layer. The synthetic resin layer may include a thermosetting resin. For example, the synthetic resin layer may be a polyimide-based resin layer, and its material is not particularly limited. In an embodiment, the synthetic resin layer may include at least one material selected from acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, siloxane-based resin, polyamide-based resin, and perylene resin. In addition, the base layer 311 may include a glass substrate, a metal substrate, or an organic / inorganic composite substrate.

[0076] The circuit layer 312 may be disposed on the base layer 311 (eg, in the third direction DR3). The circuit layer 312 may be a layer including a pixel circuit and an insulating layer. The pixel circuit may include at least one transistor and at least one capacitor.

[0077] The light emitting element layer 313 may be disposed on the circuit layer 312 (e.g., in the third direction DR3). The light emitting element layer 313 may be a layer for generating light. The light emitting element layer 313 may generate light or control the amount of light according to an electrical signal. When the display panel 310 is an organic light emitting display panel, the light emitting element layer 313 may include an organic light emitting material. When the display panel 310 is a quantum dot light emitting display panel, the light emitting element layer 313 may include quantum dots or quantum rods. However, embodiments of the present inventive concept are not limited thereto, and the display panel 310 may be various other light emitting element layers, such as an inorganic light emitting element layer, etc.

[0078] The encapsulation layer 314 may be disposed on the light emitting element layer 313 (e.g., in the third direction DR3). The encapsulation layer 314 may include at least one insulating layer. For example, the encapsulation layer 314 may include at least one inorganic layer and at least one organic layer. The inorganic layer may protect the light emitting element layer 313 from moisture and oxygen, and the organic layer may protect the light emitting element layer 313 from foreign matter such as dust particles.

[0079] The input detection layer 320 may be disposed on the display panel 310 (e.g., in the third direction DR3). The input detection layer 320 may detect external input to obtain position information of the external input. The input detection layer 320 may detect various types of external input. For example, the external input may include touch, light, heat, pressure, etc. from a part of the user's body. In addition, the input detection layer 320 may detect the contact window 100 (see Figure 2 ) or detects input that is close to or adjacent to window 100.

[0080] The input detection layer 320 may be directly disposed on the display panel 310 (e.g., in the third direction DR3). For example, in an embodiment of the present inventive concept, the input detection layer 320 and the display panel 310 may be formed by a continuous process. However, in another embodiment of the present inventive concept, the input detection layer 320 may be attached to the display panel 310. In this embodiment, an adhesive layer may also be disposed between the input detection layer 320 and the display panel 310 (e.g., in the third direction DR3).

[0081] The detection unit 400 may be disposed below the display module 300. For example, Figure 3 As shown in the embodiment of the present invention, the detection unit 400 may be attached to the rear surface of the display panel 310 by an adhesive layer 1000-A disposed between the detection unit 400 and the display panel 310 (e.g., in the third direction DR3). In an embodiment, the adhesive layer 1000-A may be an optically transparent adhesive member, and the adhesive layer 1000-A may include a conventional adhesive or glue.

[0082] The detection unit 400 may include a base layer 410 , a sensor 420 , and an optical pattern layer 430 .

[0083] The base layer 410 may include a synthetic resin layer. The synthetic resin layer may include a thermosetting resin. For example, the synthetic resin layer may be a polyimide-based resin layer, and its material is not particularly limited. For example, the base layer 410 may include two polyimide resin layers and a barrier layer disposed between the polyimide resin layers. The barrier layer may include amorphous silicon and silicon oxide. However, embodiments of the present inventive concept are not limited thereto.

[0084] The sensor 420 may be disposed on the base layer 410. The sensor 420 may be referred to as a sensor layer or a biometric information detection layer. The sensor 420 may include a detection circuit and an insulating layer. The detection circuit may include at least one transistor and at least one photodiode.

[0085] The optical pattern layer 430 may be directly disposed on the sensor 420. For example, in an embodiment, the optical pattern layer 430 and the sensor 420 may be formed by a continuous process. The optical pattern layer 430 and the sensor 420 may be in direct contact with each other. That is, a third component such as an adhesive layer may not be disposed between the optical pattern layer 430 and the sensor 420.

[0086] The optical pattern layer 430 may filter light incident to the sensor 420. For example, the incident angle of light that may pass through the optical pattern layer 430 may be controlled by the optical pattern layer 430. For example, the incident angle of light that passes through the optical pattern layer 430 may be limited to a predetermined maximum angle. Since the incident angle of light that passes through the optical pattern layer 430 is limited, the accuracy of fingerprint recognition may be improved.

[0087] Figure 4 is a schematic cross-sectional view of some components of a display device according to an embodiment of the inventive concept. Figure 4 Embodiments of the invention include Figure 3 The differences will be described in detail, and the same reference numerals will be given to the remaining repeated components, and their description will be omitted.

[0088] Reference Figure 4 In the embodiment shown in FIG. 3 , an infrared filter 600 may be further provided between the display module 300 and the detection unit 400 (for example, in the third direction DR3). The infrared filter 600 may be a filter that blocks infrared transmission and transmits visible light.

[0089] From the user's fingerprint 2000 (see Figure 1 ) The light reflected can be visible light. Figure 4 In the embodiment shown in , since the infrared filter 600 blocks light of a wavelength band other than the wavelength band of light reflected by the fingerprint 2000 , the fingerprint recognition accuracy of the sensor 420 can be improved.

[0090] The adhesive layer 1000 -A may be disposed between the infrared filter 600 and the display module 300 and between the infrared filter 600 and the detection unit 400 (eg, in the third direction DR3 ).

[0091] Figure 5 is a cross-sectional view of a display module 300 according to an embodiment of the inventive concept.

[0092] Reference Figure 5 In the embodiment shown in , the circuit layer 312 , the light emitting element layer 313 , the encapsulation layer 314 , and the input detection layer 320 may be sequentially disposed on the base layer 311 (eg, in the third direction DR3 ).

[0093] The barrier layer 10 may be disposed on the base layer 311. The barrier layer 10 prevents foreign matter from flowing into the display module 300 from the outside. In an embodiment, the barrier layer 10 may include at least one of a silicon oxide layer and a silicon nitride layer. Each of the silicon oxide layer and the silicon nitride layer may be provided in plural, and the silicon oxide layer and the silicon nitride layer may be alternately stacked.

[0094] The buffer layer 20 may be disposed on the barrier layer 10. The buffer layer 20 improves the bonding force between the base layer 311 and the semiconductor pattern and / or the conductive pattern. In an embodiment, the buffer layer 20 may include at least one of a silicon oxide layer and a silicon nitride layer. The silicon oxide layer and the silicon nitride layer may be alternately stacked.

[0095] The transistor 312-T of the pixel circuit may be disposed on the buffer layer 20. The transistor 312-T may include an active pattern 312-A, a source 312-S, a drain 312-D, and a gate 312-G.

[0096] A semiconductor pattern including a source 312-S, an active pattern 312-A, and a drain 312-D is disposed on the buffer layer 20. Hereinafter, the semiconductor pattern directly disposed on the buffer layer 20 may include a silicon semiconductor, a polycrystalline silicon semiconductor, or an amorphous silicon semiconductor. The semiconductor patterns have different electrical properties depending on whether they are doped. The semiconductor pattern may include a doped region and an undoped region. The doped region may be doped with an N-type dopant or a P-type dopant. The P-type transistor includes a doped region doped with a P-type dopant.

[0097] The doped region has greater conductivity than the non-doped region and is basically used as an electrode or signal wiring. The non-doped region is basically an active pattern (or channel) of a transistor. For example, a portion of the semiconductor pattern may be an active pattern 312-A of a transistor 312-T. Another portion may be a source 312-S or a drain 312-D of the transistor 312-T. Another portion may be a connection signal wiring (or a connection electrode).

[0098] The first insulating layer 11 is disposed on the buffer layer 20 and covers the semiconductor pattern including the source 312-S, the active pattern 312-A, and the drain 312-D. The first insulating layer 11 may be an inorganic layer and / or an organic layer, and may have a single-layer structure or a multi-layer structure. In an embodiment, the first insulating layer 11 may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, and hafnium oxide. For example, the first insulating layer 11 may be a single silicon oxide layer. The inorganic layer to be described later may include at least one of the above materials.

[0099] The gate 312-G may be disposed on the first insulating layer 11. The gate 312-G may be a part of the metal pattern. The gate 312-G may overlap with the active pattern 312-A (eg, in the third direction DR3). The gate 312-G may be used as a mask in a process of doping the semiconductor pattern.

[0100] The second insulating layer 12 may be disposed on the first insulating layer 11 and cover the gate 312-G. The second insulating layer 12 may be an inorganic layer and may have a single layer structure or a multi-layer structure. In an embodiment, the second insulating layer 12 may be a single silicon oxide layer.

[0101] The third insulating layer 13 may be disposed on the second insulating layer 12. In an embodiment, the third insulating layer 13 may be an organic layer and may have a single layer structure or a multilayer structure. For example, the third insulating layer 13 may be a single polyimide resin layer. However, embodiments of the present inventive concept are not limited thereto, and the third insulating layer 13 may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, siloxane-based resin, polyimide-based resin, polyamide-based resin, and perylene resin. The organic layer to be described later may include at least one of the above materials.

[0102] The first and second connection electrodes 312-C1 and 312-C2 may be disposed on the third insulating layer 13. Each of the first and second connection electrodes 312-C1 and 312-C2 may be electrically connected to the transistor 312-T by passing through the first, second, and third insulating layers 11, 12, and 13.

[0103] The fourth insulating layer 14 may be disposed on the third insulating layer 13 and may cover the first connection electrode 312 - C1 and the second connection electrode 312 - C2 . In an implementation, the fourth insulating layer 14 may be an inorganic layer.

[0104] The fifth insulating layer 15 may be disposed on the fourth insulating layer 14. In an implementation, the fifth insulating layer 15 may be an organic layer, and may have a single layer structure or a multi-layer structure.

[0105] The light emitting element layer 313 may be disposed on the fifth insulating layer 15. The light emitting element layer 313 may include a first electrode 313-E1, a light emitting layer 313-EL, and a second electrode 313-E2. Figure 5 As shown in the embodiment, the lower surface of the light-emitting layer 313-EL can be disposed on the upper surface of the first electrode 313-E1, and the lower surface of the second electrode 313-E2 ​​can be disposed on the upper surface of the light-emitting layer 313-EL.

[0106] The first electrode 313-E1 may be electrically connected to the transistor 312-T by passing through the fourth insulating layer 14 and the fifth insulating layer 15 and extending to the second connecting electrode 312-C2. The first electrode 313-E1 may be connected to the Y or more transmissive portions 431 (see FIG. 4 ) of the optical pattern layer 430 (eg, in the third direction DR3). Figure 6) overlap. Y ​​may be a positive integer, and the transmissive portion 431 of the optical pattern layer 430 will be described later (see Figure 6 ) description.

[0107] The pixel defining layer 16 may be disposed on the fifth insulating layer 15 and on the lateral edge of the first electrode 313-E1. An opening for exposing the first electrode 313-E1 (e.g., a central portion of the first electrode 313-E1) may be defined in the pixel defining layer 16. The shape of the opening on a plane may correspond to the pixel area PXA.

[0108] The light emitting layer 313-EL may be disposed on the first electrode 313-E1. The light emitting layer 313-EL may provide light of a predetermined color. Figure 5 The embodiment of the present invention shows a light-emitting layer 313-EL having a single patterned layer. However, the embodiments of the present invention are not limited thereto. For example, in other embodiments, the light-emitting layer 313-EL may have a multilayer structure. In addition, the light-emitting layer 313-EL may extend toward the upper surface of the pixel defining layer 16.

[0109] The second electrode 313-E2 ​​may be disposed on the light emitting layer 313-EL. In an embodiment, an electron control layer may be disposed between the second electrode 313-E2 ​​and the light emitting layer 313-EL, and a hole control layer may be disposed between the first electrode 313-E1 and the light emitting layer 313-EL.

[0110] In an embodiment of the present inventive concept, each of the first electrode 313-E1 and the second electrode 313-E2 ​​may include a transparent conductive material. For example, each of the first electrode 313-E1 and the second electrode 313-E2 ​​may include at least one compound selected from indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), and indium gallium zinc oxide (IGZO). However, embodiments of the present inventive concept are not limited thereto.

[0111] The encapsulation layer 314 may be disposed on the second electrode 313-E2. Figure 5 As shown in the embodiment of FIG. 3 , the encapsulation layer 314 may include a first inorganic layer 314 - 1 , an organic layer 314 - 2 , and a second inorganic layer 314 - 3 .

[0112] The first inorganic layer 314-1 may be disposed on the second electrode 313-E2 ​​(e.g., in the third direction DR3). The organic layer 314-2 may be disposed on the first inorganic layer 314-1 (e.g., in the third direction DR3). The second inorganic layer 314-3 may be disposed on the organic layer 314-2 (e.g., in the third direction DR3) and may cover the organic layer 314-2. In an embodiment, the first inorganic layer 314-1 and the second inorganic layer 314-3 may include a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, an aluminum oxide layer, etc. However, embodiments of the inventive concept are not limited thereto. In an embodiment, the organic layer 314-2 may include an acryl-based organic layer. However, embodiments of the inventive concept are not limited thereto. The first inorganic layer 314-1 and the second inorganic layer 314-3 may protect the light emitting element layer 313 from moisture / oxygen, and the organic layer 314-2 may protect the light emitting element layer 313 from foreign matter such as dust particles.

[0113] The input detection layer 320 may be disposed on the encapsulation layer 314 (e.g., in the third direction DR3). The input detection layer 320 may include a first conductive layer 321-M, a first detection insulating layer 321, a second conductive layer 322-M, and a second detection insulating layer 322. At least one of the first conductive layer 321-M and the second conductive layer 322-M may include a detection electrode. The input detection layer 320 may obtain information about an external input by detecting a change in capacitance between the detection electrodes.

[0114] Figure 6 is a cross-sectional view of a detection unit according to an embodiment of the present inventive concept.

[0115] Reference Figure 6 The detection unit 400 may include a base layer 410 , a sensor 420 disposed on the base layer 410 , and an optical pattern layer 430 disposed on the sensor 420 .

[0116] The barrier layer 421 may be disposed on the base layer 410 (eg, in the third direction DR3). The buffer layer 422 may be disposed on the barrier layer 421 (eg, in the third direction DR3). The description of the barrier layer 421 and the buffer layer 422 may be the same as that of the above reference numerals. Figure 5 The barrier layer 10 and the buffer layer 20 described correspond.

[0117] The transistor 420-T may be disposed on the buffer layer 422. The transistor 420-T may include an active pattern 420-A, a source 420-S, a drain 420-D, and a gate 420-G. The active pattern 420-A, the source 420-S, and the drain 420-D may be disposed on the buffer layer 422.

[0118] The first insulating layer 423 is disposed on the buffer layer 422 and covers the active pattern 420-A, the source 420-S, and the drain 420-D. In an embodiment, the first insulating layer 423 may be an inorganic layer and / or an organic layer, and may have a single-layer structure or a multi-layer structure. For example, in an embodiment, the first insulating layer 423 may be a single silicon oxide layer.

[0119] The gate 420-G and the wiring layer 420-L may be disposed on the first insulating layer 423 (eg, in the third direction DR3). The wiring layer 420-L may be provided with a predetermined voltage, such as a bias voltage. The wiring layer 420-L may be electrically connected to a detection element 420-PD to be described later.

[0120] The second insulating layer 424 may be disposed on the first insulating layer 423 and may cover the gate 420-G and the wiring layer 420-L (for example, in the third direction DR3). In an embodiment, the second insulating layer 424 may be an inorganic layer and may have a single-layer structure or a multi-layer structure. For example, the second insulating layer 424 may be a single silicon oxide layer.

[0121] The detection element 420-PD may be disposed on the second insulating layer 424. The detection element 420-PD may be electrically connected to the transistor 420-T and the wiring layer 420-L. For example, the detection element 420-PD may be controlled by a signal provided from the transistor 420-T and may receive a predetermined voltage from the wiring layer 420-L.

[0122] The detection element 420 -PD may include a first detection electrode 420 -E1 , a detection layer 420 -SA, and a second detection electrode 420 -E2 .

[0123] The first detection electrode 420-E1 may pass through the first insulating layer 423 and the second insulating layer 424 to be electrically connected to the transistor 420-T. The first detection electrode 420-E1 may include an opaque conductive material. For example, the first detection electrode 420-E1 may include molybdenum (Mo).

[0124] The sensing layer 420-SA may be disposed on the first sensing electrode 420-E1. In an embodiment, the sensing layer 420-SA may include amorphous silicon.

[0125] The second detection electrode 420-E2 may be disposed on the detection layer 420-SA (eg, in the third direction DR3). In an embodiment, the second detection electrode 420-E2 may include a transparent conductive material. For example, the second detection electrode 420-E2 may include indium tin oxide (ITO).

[0126] The third insulating layer 425 may be disposed on the second detection electrode 420-E2 (eg, in the third direction DR3). In an embodiment, the third insulating layer 425 may be an inorganic layer and may have a single layer structure or a multilayer structure. For example, the third insulating layer 425 may include a silicon oxide layer and a silicon nitride layer.

[0127] The connection electrode 420-C may be disposed on the third insulating layer 425 (e.g., in the third direction DR3). The connection electrode 420-C may be electrically connected to the second detection electrode 420-E2 through the third insulating layer 425. In addition, the connection electrode 420-C may be electrically connected to the wiring layer 420-L through the second insulating layer 424 and the third insulating layer 425.

[0128] The fourth insulating layer 426 may be disposed on the third insulating layer 425 (eg, in the third direction DR3) and cover the connection electrode 420-C. In an embodiment, the fourth insulating layer 426 may be an organic layer and may have a single layer structure or a multi-layer structure. For example, the fourth insulating layer 426 may be a single polyimide resin layer.

[0129] The optical pattern layer 430 may be directly disposed on the sensor 420. For example, the lower surface of the optical pattern layer 430 may be directly disposed (eg, in the third direction DR3) on the upper surface of the fourth insulating layer 426. For example, in an embodiment, the optical pattern layer 430 and the sensor 420 may be formed by a continuous process.

[0130] The optical pattern layer 430 may include a plurality of transmissive portions 431 (hereinafter, referred to as transmissive portions) and at least one light blocking portion 432. For example, the light blocking portion 432 may be a single light blocking portion surrounding a plurality of discrete transmissive portions 431, or the light blocking portion 432 may be a plurality of discrete light blocking portions alternately arranged with the transmissive portions 431. The transmissive portions 431 may have optical transparency, and the light blocking portions 432 may have a property of absorbing light. Figure 1 )The reflected light 2000-L can pass through the transmission portion 431 and can be incident on the detection element 420-PD.

[0131] When the incident angle 2000-AG of the light 2000-L on the optical pattern layer 430 (eg, the upper surface of the optical pattern layer 430) is greater than a predetermined maximum angle, in addition to the light from the fingerprint 2000 (see Figure 1), light reflected from a second valley adjacent to the first valley may be incident on the detection element 420-PD. This may reduce the accuracy of fingerprint recognition. According to an embodiment of the inventive concept, the optical pattern layer 430 may prevent light 2000-L having a specific incident angle 2000-AG from passing through the optical pattern layer 430. For example, only light 2000-L incident at an angle less than or equal to a predetermined maximum incident angle may pass through the optical pattern layer 430 to reach the detection element 420-PD. Therefore, the accuracy or sensitivity of fingerprint recognition may be improved.

[0132] In an embodiment of the present invention, the fingerprint 2000 (see Figure 1 ) and the display device 1000 (see Figure 1 ) and the optical pattern layer 430 (e.g., in the third direction DR3) to determine the maximum incident angle. For example, the pitch of the fingerprint 2000 may be defined as a gap between a first valley and a second valley or a gap between a first ridge and a second ridge. The pitch of the fingerprint 2000 may generally be in the range of 400 microns to 600 microns. The spacing distance may be the distance between the upper surface of the optical pattern layer 430 and the window 100 (see Figure 2 )’s upper surface.

[0133] For example, in an embodiment where the fingerprints 2000 are spaced 400 microns apart and separated by 800 microns, the maximum angle of incidence may be defined as tan -1 (200 / 800), which is equal to 14 degrees. In an embodiment where the fingerprints 2000 are spaced 600 microns apart and separated by 800 microns, the maximum angle of incidence 2000-AG can be defined as tan -1 (300 / 800), which is equal to 20 degrees. Considering the pitch and spacing distance of the fingerprints 2000, the predetermined incident angle may be set as a design condition.

[0134] The incident angle 2000-AG can be controlled by the ratio of the width 431-W (e.g., the length in the first direction DR1) of each of the transmission parts 431 to the height 432-H (e.g., the length in the third direction DR3) of the light blocking part 432. For example, if the maximum incident angle of light passing through the optical pattern layer 430 is 15 degrees, the ratio of the width 431-W of each of the transmission parts 431 to the height 432-H of the light blocking part 432 can be set to satisfy the following equation.

[0135] [Equation]

[0136] Width 431-W / Height 432-H≤tan(15 degrees)

[0137] Therefore, the width 431-W / height 432-H may be 0.2679 or less. For example, the ratio of the width 431-W of the transmissive portion 431 to the height 432-H of the light blocking portion 432 may be 1:(3.73 or greater). For example, the height 432-H may be 1 / tan(AG) times or more of the width 431-W. AG may be an incident angle set according to design conditions. If the height 432-H is 1 / tan(AG) times the width 431-W, the incident angle (e.g., taking into account the spacing and spacing distance of the fingerprint 2000) may correspond to the maximum incident angle of light that can pass through the optical pattern layer 430.

[0138] The height 432-H may be set to 3.73 or more times the width 431-W. For example, the ratio of the width 431-W to the height 432-H may be set to 1:3.75. For example, when the width 431-W is 2 micrometers, the height 432-H may be greater than or equal to 7.5 micrometers.

[0139] The upper limit of the ratio of the width 431-W of the transmission part 431 to the height 432-H of the light blocking part 432 may be determined according to the transmittance. For example, as the ratio of the width 431-W of the transmission part 431 to the height 432-H of the light blocking part 432 increases, the amount of light that can pass through the transmission part 431 may decrease. Therefore, in consideration of this, the ratio of the width 431-W of the transmission part 431 to the height 432-H of the light blocking part 432 may be predetermined, and for example, the ratio of the width 431-W to the height 432-H may be 1:(5 or less). However, the upper limit of the ratio of the width 431-W to the height 432-H is not limited to the above example.

[0140] According to an embodiment of the inventive concept, one detection element 420-PD may overlap with a plurality of transmissive portions 431 (e.g., in the third direction DR3). In an embodiment, the spacing between the detection element 420-PD and the second detection element adjacent to the detection element 420-PD may be 50 microns, and the gap between adjacent detection elements 420-PD may be 7.5 microns. Therefore, the width of the second detection electrode 420-E2 may be about 42.5 microns. In this embodiment, a plurality of transmissive portions 431 having a width 431-W of 2 microns may be provided on the second detection electrode 420-E2. For example, one second detection electrode 420-E2 may overlap with at least X transmissive portions 431. X may be a positive integer.

[0141] In an embodiment of the present inventive concept, the size of the second detection electrode 420-E2 may be larger than the first electrode 313-E1 (see Figure 5). For example, the width of the second detection electrode 420-E2 (e.g., the length in the first direction DR1) may be greater than the width of the first electrode 313-E1. Therefore, the number of transmissive portions 431 overlapping the second detection electrode 420-E2 (e.g., in the third direction DR3) may be greater than the number of transmissive portions 431 overlapping the first electrode 313-E1.

[0142] In an embodiment of the present inventive concept, the minimum distance 420-DT between the light blocking portion 432 and the detection element 420-PD (e.g., the length in the third direction DR3) may be less than or equal to 5 microns and greater than or equal to 1 micron. For example, the minimum distance 420-DT may be in the range of about 1 micron to 5 microns. The minimum distance 420-DT may be the distance (e.g., the length in the third direction DR3) between the lowest surface of the light blocking portion 432 and the highest part of the detection element 420-PD (such as the top surface of the second detection electrode 420-E2 of the detection element 420-PD). However, the lower limit of the minimum distance 420-DT is not limited to the above example.

[0143] If the minimum distance 420-DT exceeds 5 micrometers, interference may occur between the light passing through the optical pattern layer 430, and this may reduce the fingerprint sensing sensitivity. For example, in an embodiment, the minimum distance 420-DT may be determined to be about 2.5 micrometers or more and about 2.8 micrometers or less. However, the minimum distance 420-DT is not limited to the above values.

[0144] According to an embodiment of the inventive concept, since the optical pattern layer 430 is directly disposed on the sensor 420, the distance between the optical pattern layer 430 and the second detection electrode 420-E2 (e.g., the length in the third direction DR3) can be reduced. Therefore, the occurrence of interference between lights passing through the optical pattern layer 430 can be prevented or reduced, thereby improving the accuracy of fingerprint recognition.

[0145] Hereinafter, a method of forming the optical pattern layer 430 will be described.

[0146] In an embodiment of the present inventive concept, a transmission layer including the same material as that of the transmission portion 431 is formed directly on the sensor 420. The transmission layer may be patterned to form the transmission portion 431. An opaque material may be filled between the transmission portions 431 to form the light blocking portion 432. In an embodiment, the transmission layer may be patterned using a photoresist process or a nanoimprint process. In addition, a hard mask including an inorganic material may be used to pattern the transmission layer, and a dry etching process may be used. In addition, after filling the opaque material, a chemical mechanical polishing process may be used.

[0147] In another embodiment of the present inventive concept, a light blocking layer including the same material as that of the light blocking portion 432 is formed directly on the sensor 420. The light blocking layer is patterned to form the light blocking portion 432. Thereafter, a transparent material may be filled in the light blocking portion 432 to form the transmission portion 431.

[0148] Figure 7 is a plan view of an optical pattern layer according to an embodiment of the present inventive concept.

[0149] Reference Figure 7 , the optical pattern layer 430 may include a transmissive portion 431 and a light blocking portion 432 surrounding the transmissive portion 431 (eg, in the first direction DR1 and the second direction DR2).

[0150] like Figure 7 As shown in the embodiment of the present invention, when viewed on a plane (e.g., from the third direction DR3), each of the transmissive portions 431 may have a circular shape. However, the embodiments of the present invention are not limited thereto, and the shape of the transmissive portion 431 may be modified to various shapes, such as an ellipse, a polygon, etc. Each of the transmissive portions 431 may be arranged along the first direction DR1 and the second direction DR2. For example, the transmissive portions 431 may be arranged in a matrix form. In an embodiment, each of the transmissive portions 431 may be equally spaced from each other in a series of evenly spaced rows (e.g., extending in the first direction DR1) and columns (e.g., extending in the second direction DR2). However, the embodiments of the present invention are not limited thereto.

[0151] Figure 8 is a plan view of an optical pattern layer according to an embodiment of the present inventive concept.

[0152] Reference Figure 8 , the optical pattern layer 430a may include transmissive portions 431-1 and 431-2 and a light blocking portion 432 surrounding the transmissive portions 431-1 and 431-2 (eg, in the first direction DR1 and the second direction DR2).

[0153] The transmissive parts 431-1 and 431-2 may include a first transmissive part 431-1 constituting a first transmissive arrangement 431a and a second transmissive part 431-2 constituting a second transmissive arrangement 431b. The first transmissive part 431-1 may be arranged along a first direction DR1, and the second transmissive part 431-2 may be arranged along the first direction DR1.

[0154] The first transmission arrangement 431a and the second transmission arrangement 431b may be alternately arranged along the second direction DR2. For example, the first transmission arrangement 431a and the second transmission arrangement 431b may be a series of columns offset from each other (e.g., in the first direction DR1). The center 431-1c of the first transmission portion 431-1 may not overlap with the center 431-2c of the second transmission portion 431-2 in the second direction DR2. For example, the first transmission portion 431-1 and the second transmission portion 431-2 may be offset from each other in the first direction DR1 and may be arranged in a zigzag shape along the second direction DR2.

[0155] When one of the transmissive portions 431-1 and 431-2 is defined as a central transmissive portion 431ct, six peripheral transmissive portions 431p spaced apart from the central transmissive portion 431ct by the same pitch PC (e.g., distance in the first direction DR1 and / or in a direction between the first direction DR1 and the second direction DR2) may be defined. The six peripheral transmissive portions 431p may be closely adjacent to the central transmissive portion 431ct in the first direction DR1 and / or in a direction between the first direction DR1 and the second direction DR2.

[0156] and Figure 7 Compared with the implementation method, Figure 8 The optical pattern layer 430a of the embodiment includes an increased number of transmissive portions 431-1 and 431-2 located in the same area. Therefore, the transmittance of the optical pattern layer 430a can be further improved. Figure 6 ) increases, so that fingerprint detection can be more efficient and accurate.

[0157] Fig. 9 is a cross-sectional view of a detection unit 400 - 1 according to an embodiment of the inventive concept. Fig. 9 In the description of Figure 6 The components described are the same components, and their description will be omitted.

[0158] Reference Fig. 9 , the optical pattern layer 430b may include a transmissive portion 431, a light blocking portion 432, and a transmissive layer 433. The transmissive layer 433 may be disposed between the transmissive portion 431 and the sensor 420 (e.g., in the third direction DR3) and between the light blocking portion 432 and the sensor 420 (e.g., in the third direction DR3). In an embodiment, the transmissive layer 433 may include the same material as the transmissive portion 431, and the transmissive layer 433 and the transmissive portion 431 may have an integral shape.

[0159] In an embodiment of the present inventive concept, after forming a preliminary transmission layer including the same material as the transmission portion 431, an upper portion (e.g., in the third direction DR3) of the preliminary transmission layer may be patterned to form the transmission portion 431 and the transmission layer 433. Thereafter, the light blocking portion 432 may be formed by filling an opaque material between the transmission portions 431.

[0160] The minimum distance 420-DT between the light blocking portion 432 and the second detection electrode 420-E2 may be less than or equal to 5 micrometers and greater than or equal to 1 micrometer. For example, in an embodiment, the minimum distance 420-DT may be in the range of about 2.5 micrometers to about 2.8 micrometers. According to an embodiment of the inventive concept, since the optical pattern layer 430b is directly disposed on the sensor 420, the distance between the optical pattern layer 430b and the second detection electrode 420-E2 (e.g., the length in the third direction DR3) may be reduced. Therefore, interference between light passing through the optical pattern layer 430b may be prevented.

[0161] Fig.10 is a cross-sectional view of a detection unit 400 - 2 according to an embodiment of the inventive concept. Fig.11 is a plan view of an optical pattern portion according to an embodiment of the present inventive concept. Fig.10 In the description of Figure 6 The components described are the same components, and their description will be omitted.

[0162] See attached Fig.10 and Fig.11 , the optical pattern portion 430c may be directly disposed on the sensor 420 (e.g., in the third direction DR3). The optical pattern portion 430c may include two optical pattern layers 430c-1 and 430c-2. For example, the optical pattern layer 430c-1 may be directly disposed on the sensor 420 (e.g., in the third direction DR3), and the additional optical pattern layer 430c-2 may be directly disposed on the optical pattern layer 430c-1 (e.g., in the third direction DR3).

[0163] The optical pattern layer 430c-1 may include a transmissive portion 431-L1 and a light blocking portion 432-L1. The additional optical pattern layer 430c-2 may include an additional transmissive portion 431-L2 and an additional light blocking portion 432-L2.

[0164] In an embodiment, each of the transmissive portion 431-L1 and the light blocking portion 432-L1 of the optical pattern layer 430c-1 may extend along the first direction DR1. The transmissive portion 431-L1 and the light blocking portion 432-L1 may be alternately arranged along the second direction DR2. Each of the additional transmissive portion 431-L2 and the additional light blocking portion 432-L2 may extend along the second direction DR2. The additional transmissive portion 431-L2 and the additional light blocking portion 432-L2 may be alternately arranged along the first direction DR1. When viewed on a plane (e.g., in the third direction DR3), the optical pattern layer 430c-1 and the additional optical pattern layer 430c-2 may have a lattice shape. However, embodiments of the inventive concept are not limited thereto. For example, in other embodiments, the transmissive portions 431-L1 and the light blocking portions 432-L1 of the optical pattern layer 430c-1 may extend along the second direction DR2 and may be alternately arranged along the first direction DR1, and the additional transmissive portions 431-L2 and the additional light blocking portions 432-L2 of the additional optical pattern layer 430c-2 may extend along the first direction DR1 and may be alternately arranged along the second direction DR2.

[0165] In an embodiment, the ratio of the width 431-Wa of each of the additional transmissive portions 431-L2 to the height 432-Ha of the additional light blocking portion 432-L2 may be less than or equal to 1:3.73. For example, the ratio of the width 431-Wa to the height 432-Ha may be set to 1:3.75. In an embodiment where the width 431-Wa is 2 microns, the height 432-Ha may be 7.5 microns. The ratio of the transmissive portion 431-L1 to the light blocking portion 432-L1 may be set to be equal to the ratio of the additional transmissive portion 431-L2 to the additional light blocking portion 432-L2.

[0166] Fig.12 is a cross-sectional view of a detection unit 400 - 3 according to an embodiment of the inventive concept. Fig.13 is a cross-sectional view of a detection unit 400-4 according to an embodiment of the present inventive concept. Fig.12 and Fig.13 In the description of Figure 6 The components described are the same components, and their description will be omitted.

[0167] Reference Fig.12 , the optical pattern layer 430d may include a transmissive portion 431d and a light blocking portion 432d. The light blocking portion 432d may include a bottom surface 432BS facing the sensor 420 and a side surface 432SS contacting the transmissive portion 431d. Fig.12As shown in the embodiment of the present invention, the angle 432-AG between the bottom surface 432BS and the side surface 432SS of the light blocking portion 432d may be less than 90 degrees. For example, in an embodiment, the angle 432-AG may be in the range of about 85 degrees to 90 degrees. However, embodiments of the inventive concept are not limited thereto.

[0168] Hereinafter, an embodiment in which the angle 432-AG is less than 90 degrees will be described by way of example. In this embodiment, each of the transmissive portions 431d may have a different width (e.g., length in the first direction DR1) depending on the position in the third direction DR3. The upper surface of each of the transmissive portions 431d may have a first width 431d-uw, and each lower surface of the transmissive portions 431d may have a second width 431d-bw. The first width 431d-uw may correspond to a maximum width of each of the transmissive portions 431d, and the second width 431d-bw may correspond to a minimum width of each of the transmissive portions 431d.

[0169] The first width 431d-uw may be equal to Figure 6 In addition, the second width 431d-bw may be smaller than the width 431-W (see Figure 6 In this embodiment, the maximum incident angle of light that can pass through the optical pattern layer 430d may be smaller than the maximum incident angle of light that can pass through the optical pattern layer 430d. Figure 6 The maximum incident angle of light on the optical pattern layer 430. Fig.12 The implementation method can further improve the accuracy or sensitivity of fingerprint recognition.

[0170] Reference Fig.13 , the optical pattern layer 430e may include a transmissive portion 431e and a light blocking portion 432e. Fig.13 In the embodiment shown in FIG. 4 , an angle 432-AG between a bottom surface 432BS of the light blocking portion 432e and a side surface 432SS of the light blocking portion 432e may be greater than 90 degrees. For example, the angle 432-AG may be in a range of about 90 to 95 degrees.

[0171] Hereinafter, an embodiment in which the angle 432-AG is greater than 90 degrees will be described by way of example. In this embodiment, each of the transmissive portions 431e may have a different width (e.g., length in the first direction DR1) depending on the position in the third direction DR3. The upper surface of each of the transmissive portions 431e may have a first width 431e-uw, and each lower surface of the transmissive portions 431e may have a second width 431e-bw. The first width 431e-uw may correspond to the minimum width of each of the transmissive portions 431e, and the second width 431e-bw may correspond to the maximum width of each of the transmissive portions 431e.

[0172] In an embodiment, the first width 431e-uw may be equal to Figure 6 The width shown in 431-W and Fig.12 The second width 431e-bw may be greater than the width 431-W (see Figure 6 ). In this embodiment, the transmittance of light passing through the optical pattern layer 430e may be improved.

[0173] In the case where the first widths 431d-uw and 431e-uw are fixed, as the angle 432-AG between the bottom surface 432BS and the side surface 432SS becomes smaller, the transmittance of the light passing through the optical pattern layers 430d and 430e can be reduced. However, the maximum incident angle of the light passing through the optical pattern layers 430d and 430e is also reduced, so that the accuracy of fingerprint recognition can be improved. In addition, as the angle 432-AG increases, the maximum incident angle of the light passing through the optical pattern layers 430d and 430e can be increased. However, the transmittance of the light passing through the optical pattern layers 430d and 430e can be improved. Therefore, the angle 432-AG can be determined according to the correlation between the accuracy of fingerprint recognition and the transmittance.

[0174] In an embodiment, the angle 432-AG between the bottom surface 432BS and the side surface 432SS may be in the range of about 85 to 95 degrees. For example, when the accuracy of fingerprint recognition needs to be increased, the angle 432-AG may be in the range of about 85 to 90 degrees. In addition, when the transmittance needs to be increased, the angle 432-AG may be in the range of about 90 to 95 degrees.

[0175] Fig.14 is a plan view showing the relationship between some components of the display device.

[0176] Reference Fig.14 , pixel regions PXA-R, PXA-G and PXA-B, an optical pattern layer 430 and a detection region 420 -AR are shown.

[0177] Each of the pixel areas PXA-R, PXA-G, and PXA-B may correspond to Figure 5 . For example, the pixel regions PXA-R, PXA-G, and PXA-B may include a first pixel region PXA-R, a second pixel region PXA-G, and a third pixel region PXA-B. In an embodiment, the first pixel region PXA-R is a region providing red light, the second pixel region PXA-G is a region providing green light, and the third pixel region PXA-B is a region providing blue light. However, embodiments of the inventive concept are not limited thereto.

[0178] like Fig.14 As shown in the embodiment of the present invention, the area of ​​the second pixel region PXA-G (for example, the area in the plane formed by the first direction DR1 and the second direction DR2) may be smaller than the area of ​​the first pixel region PXA-R and the area of ​​the third pixel region PXA-B. In addition, the area of ​​the third pixel region PXA-B may be larger than the area of ​​the first pixel region PXA-R and the area of ​​the second pixel region PXA-G.

[0179] The detection region 420-AR includes a detection element 420-PD (see Figure 6 ) and an effective detection region 420-AAR, in which a transistor 420-T (see Figure 6 ) is electrically connected to a detection element 420-PD, and the detection area 420-AR may also include a peripheral area surrounding the effective detection area 420-AAR.

[0180] In an embodiment of the present inventive concept, one detection area 420-AR may overlap with a plurality of pixel areas. For example, one detection area 420-AR may overlap with at least some portions of two first pixel areas PXA-R, one second pixel area PXA-G, and at least some portions of two third pixel areas PXA-B.

[0181] In an embodiment of the inventive concept, each of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may overlap (e.g., in the third direction DR3) with the plurality of transmissive portions 431. For example, the first electrode 313-E1 (see FIG. 2 ) disposed in the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may overlap (e.g., in the third direction DR3) with the plurality of transmissive portions 431. Figure 5 ) also overlaps with multiple transmissive portions 431.

[0182] The number of transmissive portions 431 overlapping each of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may vary according to the area of ​​each of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B. For example, in an embodiment, the number of transmissive portions 431 overlapping the third pixel region PXA-B may be the largest, the number of transmissive portions 431 overlapping the first pixel region PXA-R may be the second largest, and the number of transmissive portions 431 overlapping the second pixel region PXA-G may be the smallest.

[0183] In an embodiment of the inventive concept, the detection area 420-AR may overlap with a plurality of transmissive portions 431 (e.g., in the third direction DR3). An embodiment in which the spacing between adjacent effective detection areas 420-AAR is 50 microns will be described. In this embodiment, the horizontal length of the detection area 420-AR may be 50 microns, and the vertical length may be 50 microns. If the spacing of the transmissive portions 431 is 3 microns, one detection area 420-AR may overlap with 256 transmissive portions 431. In addition, if the spacing of the transmissive portions 431 is 4 microns, one detection area 420-AR may overlap with 144 transmissive portions 431. In addition, if the spacing of the transmissive portions 431 is 5 microns, one detection area 420-AR may overlap with 100 transmissive portions 431.

[0184] The area of ​​each of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be smaller than the area of ​​the detection region 420-AR. Therefore, the number of transmissive portions 431 respectively overlapping the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be smaller than the number of transmissive portions 431 overlapping the detection region 420-AR. In addition, the first electrode 313-E1 (see Figure 5 ) may be smaller than the number of the transmissive portions 431 overlapping the second detection electrode 420-E2 (see Figure 6 )The number of overlapping transmissive portions 431.

[0185] Fig.15 is a plan view showing the relationship between some components of the display device.

[0186] Reference Fig.15 , pixel regions PXA-R, PXA-G and PXA-B, an optical pattern layer 430f and a detection region 420-AR are shown.

[0187] The optical pattern layer 430f may include a transmissive portion 431f and a light blocking portion 432f. In an embodiment of the present inventive concept, the transmissive portion 431f may be disposed only in an area overlapping with the effective detection region 420-AAR (e.g., in the third direction DR3). For example, the transmissive portion 431f may not be disposed on the outermost portion of the detection region 420-AR.

[0188] like Fig.15 As shown in the embodiment of FIG. 4 , at least a portion of the detection region 420-AR on a plane (e.g., a plane defined by the first direction DR1 and the second direction DR2) may be covered by the light blocking portion 432f. For example, the transmissive portion 431f may be provided only in the effective detection region 420-AAR in the detection region 420-AR. The detection element 420-PD (see FIG. 4 ) Figure 6 ) can be set in the effective detection area 420-AAR.

[0189] For example, in an embodiment, the horizontal length and vertical length of the effective detection area 420-AAR may be 36 microns. If the pitch of the transmissive portions 431f is 3 microns, one detection area 420-AR may overlap with 144 transmissive portions 431f. In addition, if the pitch of the transmissive portions 431f is 4 microns, one detection area 420-AR may overlap with 81 transmissive portions 431f. In addition, if the pitch of the transmissive portions 431f is 5 microns, one detection area 420-AR may overlap with 49 transmissive portions 431f.

[0190] According to an embodiment of the present invention, light reflected from a fingerprint may pass through the optical pattern layer and may be incident on a sensor. The incident angle of light that may pass through the optical pattern layer may be limited by the optical pattern layer to a predetermined angle or less. Since the incident angle is limited, the accuracy of fingerprint recognition may be improved.

[0191] In addition, according to an embodiment of the present invention, the optical pattern layer can be directly disposed on the sensor. Therefore, the distance between the optical pattern layer and the detection electrode of the sensor can be reduced. Therefore, the occurrence of interference between light passing through the optical pattern layer can be prevented or reduced, thereby improving the accuracy of fingerprint recognition.

[0192] Although the embodiments of the inventive concept have been described, it should be understood that the inventive concept is not limited to these embodiments, but various changes and modifications may be made by one of ordinary skill in the art within the spirit and scope of the inventive concept as claimed.

Claims

1. Display equipment, including: A sensor including a detection electrode; an optical pattern layer disposed on the sensor and comprising a plurality of transmission portions and light blocking portions; as well as a display panel disposed on the optical pattern layer and comprising a light emitting element layer having a first electrode, wherein the minimum distance between the detection electrode and the light blocking portion is in the range of 1 micrometer to 5 micrometers, and The number of the transmissive portions among the plurality of transmissive portions overlapping the detection electrode is greater than the number of the transmissive portions among the plurality of transmissive portions overlapping the first electrode.

2. The display device according to claim 1, wherein: The height of the light blocking portion is greater than or equal to 1 / tan(AG) times the width of each of the plurality of transmission portions and less than or equal to 5 times the width of each of the plurality of transmission portions, Wherein, AG is the incident angle of light on the optical pattern layer.

3. The display device according to claim 1, wherein: The optical pattern layer further includes a transmission layer disposed between the plurality of transmission portions and the sensor and between the light blocking portion and the sensor in a thickness direction of the display device.

4. The display device according to claim 3, wherein: The transmission layer includes the same material as that of the plurality of transmission portions.

5. The display device according to claim 1, wherein: An angle between a bottom surface of the light blocking portion and a side surface of the light blocking portion is in a range of 85 to 90 degrees or 90 to 95 degrees.

6. The display device according to claim 1, wherein: The plurality of transmission parts are arranged along a first direction and a second direction on a plane, and the light blocking part surrounds the plurality of transmission parts.

7. The display device according to claim 1, wherein: The plurality of transmissive parts include a first transmissive part and a second transmissive part, the first transmissive part constituting a first transmissive arrangement and the second transmissive part constituting a second transmissive arrangement, wherein the first transmission part and the second transmission part are arranged along a first direction respectively, wherein the first transmission arrangement and the second transmission arrangement are alternately arranged along a second direction intersecting the first direction, Wherein, a center of the first transmission portion does not overlap with a center of the second transmission portion in the second direction.

8. The display device according to claim 1, wherein: The plurality of transmissive portions include a central transmissive portion and six peripheral transmissive portions adjacent to the central transmissive portion and spaced apart from the central transmissive portion at the same interval. 9 . The display apparatus of claim 1 , further comprising an additional optical pattern layer disposed on the optical pattern layer and comprising a plurality of additional transmission parts and additional light blocking parts.

10. The display device according to claim 9, wherein: Each of the plurality of transmissive portions extends along a first direction, and each of the plurality of additional transmissive portions extends along a second direction intersecting the first direction.

11. The display device according to claim 1, wherein: The detection electrode overlaps X transmission parts among the plurality of transmission parts on a plane, where X is a positive integer.

12. The display device according to claim 11, wherein: The display panel comprises: Basal layer; a circuit layer, disposed on the base layer and comprising a pixel circuit; and The light emitting element layer is disposed on the circuit layer and includes the first electrode, a light emitting layer and a second electrode. The first electrode and the second electrode have transparency, and the first electrode overlaps with Y transmission parts of the plurality of transmission parts, where Y is a positive integer. 13 . The display device according to claim 1 , further comprising an infrared filter disposed between the display panel and the optical pattern layer in a thickness direction of the display device.

14. The display device according to claim 1, wherein: An active area for displaying an image and a peripheral area surrounding the active area are defined in the display panel; A detection area for detecting biometric information is defined in the sensor; as well as The detection area overlaps an entire portion of the effective area.

15. Display equipment, including: a detection unit having a sensor and an optical pattern layer, the sensor including a detection electrode, the optical pattern layer being disposed on the sensor and including a plurality of transmission parts and a light blocking part adjacent to the plurality of transmission parts; as well as a display panel disposed on the detection unit and including a light emitting element layer having a first electrode, a light emitting layer, and a second electrode, wherein each of the first electrode and the detection electrode overlaps with two or more of the plurality of transmission portions, and The number of the transmissive portions among the plurality of transmissive portions overlapping the detection electrode is greater than the number of the transmissive portions among the plurality of transmissive portions overlapping the first electrode.

16. The display device according to claim 15, wherein: A minimum distance between the detection electrode and the light blocking portion is in a range of 1 micrometer to 5 micrometers.

17. The display device according to claim 15, wherein: The optical pattern layer further includes a transmission layer disposed between the plurality of transmission parts and the sensor and between the light blocking part and the sensor in a thickness direction of the display device; and The transmission layer includes the same material as that of the plurality of transmission portions.

18. The display device according to claim 15, wherein: The height of the light blocking portion is greater than or equal to 1 / tan(AG) times the width of each of the plurality of transmission portions and less than or equal to 5 times the width of each of the plurality of transmission portions, Wherein, AG is the incident angle of light on the optical pattern layer, Wherein, an angle between a bottom surface of the light blocking portion and a side surface of the light blocking portion is in a range of 85 degrees to 90 degrees or 90 degrees to 95 degrees.

19. The display device according to claim 15, wherein: The plurality of transmissive portions include a central transmissive portion and six peripheral transmissive portions adjacent to the central transmissive portion and spaced apart from the central transmissive portion at the same interval.

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