Display device with biometric functionality

Abstract

A display device is disclosed that includes a display panel configured to display images. A biometric sensor module is disposed on the display panel. The biometric sensor module is configured to output a first transmission signal having a first frequency in a fingerprint sensing mode to sense fingerprint information. The biometric sensor is also configured to output a second transmission signal having a second frequency different from the first frequency in a skin measurement mode to sense skin condition information.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2019-0130772, filed on October 21, 2019, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to display devices, and more specifically, to display devices capable of sensing a user's biometric information. Background Technology

[0004] Many multimedia devices include display devices for displaying images, such as televisions, mobile phones, tablets, navigators, or game consoles. These display devices may be equipped with input sensing panels for receiving touch-based input, enabling users to easily and intuitively input information or commands without using buttons, keyboards, or mice.

[0005] Recently, display devices for multimedia equipment have been developed that perform biometric detection processes for fingerprint recognition in user authentication devices used in online banking, product purchases, security, etc. Summary of the Invention

[0006] The present invention provides a display device capable of measuring skin elasticity using a biometric sensor for sensing biometric fingerprint input.

[0007] The present invention also provides a method for operating a display device capable of sensing fingerprints and measuring skin elasticity.

[0008] In an exemplary embodiment of the present invention, the display device includes a display panel configured to display an image. A biometric sensor module is disposed on the display panel. The biometric sensor module is configured to output a first transmission signal having a first frequency in a fingerprint sensing mode to sense fingerprint information. The biometric sensor is also configured to output a second transmission signal having a second frequency different from the first frequency in a skin measurement mode to sense skin condition information.

[0009] In an exemplary embodiment, the biometric sensor module may be an ultrasonic sensor module, and each of the first transmission signal and the second transmission signal may be an ultrasonic signal.

[0010] In an exemplary embodiment, the display panel may include a border area and an image area therein where an image is displayed, and the biometric sensor module may send one of a first transmission signal and a second transmission signal to a sensing area corresponding to a portion of the image area.

[0011] In an exemplary embodiment, the biometric sensor module may include: a biometric sensor module comprising a plurality of detection sensors configured to output either a first transmission signal or a second transmission signal and to receive either fingerprint information or skin condition information; a selection circuit configured to control the operation of the plurality of detection sensors; and an output circuit configured to output a received signal corresponding to either the fingerprint information or the skin condition information sensed by the plurality of detection sensors.

[0012] In an exemplary embodiment, each of the plurality of detection sensors may transmit a first transmission signal with a first frequency in fingerprint sensing mode and a second transmission signal with a second frequency in skin measurement mode.

[0013] In an exemplary embodiment, the output circuit can output a first receiving signal corresponding to fingerprint information in fingerprint sensing mode, and output a second receiving signal corresponding to skin condition information in skin measurement mode.

[0014] In an exemplary embodiment, the plurality of detection sensors may include: a first detection sensor configured to transmit a first transmission signal having a first frequency in a fingerprint sensing mode; and a second detection sensor configured to transmit a second transmission signal having a second frequency in a skin measurement mode.

[0015] In an exemplary embodiment, the first detection sensor and the second detection sensor may be arranged alternately in a specified direction.

[0016] In an exemplary embodiment, each of the second detection sensors may have a larger size than each of the first detection sensors.

[0017] In an exemplary embodiment, the number of first detection sensors may be greater than the number of second detection sensors.

[0018] In an exemplary embodiment, the first frequency of the first transmitted signal may be higher than the second frequency of the second transmitted signal.

[0019] In an exemplary embodiment, the first frequency of the first transmitted signal can be set to a specified frequency in the range of about 10 MHz to 20 MHz, and the second frequency of the second transmitted signal can be set to a specified frequency in the range of about 10 kHz to 50 kHz.

[0020] In an exemplary embodiment of the present invention, the display device includes a display panel configured to display an image. A biometric sensor module is disposed on the display panel and configured to receive biometric information. The biometric sensor module includes a first detection sensor configured to transmit a first transmission signal having a first frequency in a fingerprint sensing mode to receive fingerprint information. The biometric sensor module also includes a second detection sensor configured to transmit a second transmission signal having a second frequency different from the first frequency in a skin measurement mode to receive skin condition information.

[0021] In an exemplary embodiment, each of the first detection sensor and the second detection sensor may be an ultrasonic sensor, and each of the first transmission signal and the second transmission signal may be an ultrasonic signal.

[0022] In an exemplary embodiment, the first detection sensor and the second detection sensor may be arranged alternately in a specified direction.

[0023] In an exemplary embodiment, each of the second detection sensors may have a larger size than each of the first detection sensors.

[0024] In an exemplary embodiment, the first frequency of the first transmitted signal may be higher than the second frequency of the second transmitted signal.

[0025] In an exemplary embodiment of the present invention, a method for operating a display device includes determining an operating mode comprising a fingerprint sensing mode or a skin measurement mode, wherein the display device has a display panel configured to display an image and a biometric sensor module configured to sense biometric information. When the operating mode is determined to be a fingerprint sensing mode, the biometric sensor module is controlled to output a first transmission signal having a first frequency. When the operating mode is determined to be a skin measurement mode, the biometric sensor module is controlled to output a second transmission signal having a second frequency different from the first frequency.

[0026] In an exemplary embodiment, the method may further include: receiving fingerprint information when the operating mode is a fingerprint sensing mode; and receiving skin condition information when the operating mode is a skin measurement mode.

[0027] In an exemplary embodiment, the biometric sensor module may be an ultrasonic sensor module, and the first frequency of the first transmitted signal may be higher than the second frequency of the second transmitted signal.

[0028] In an exemplary embodiment of the present invention, the display device includes a display panel configured to display an image. A bioassay sensor module is disposed on the display panel. The bioassay sensor module is configured to operate in a plurality of bioassay sensor modes. Each bioassay sensor mode is configured to determine bioassay information of a different type than other bioassay sensor modes among the plurality of bioassay sensor modes used by the user. The bioassay sensor module is also configured to output a transmitted signal and receive a reflected transmitted signal in each bioassay sensor mode. The transmitted signal in each bioassay sensor mode has a predetermined frequency different from a predetermined frequency of the transmitted signal in each of the other bioassay sensor modes among the plurality of bioassay sensor modes. The bioassay sensor module is also configured to generate a received signal from the reflected transmitted signal in each bioassay sensor mode to determine different types of bioassay information in each of the plurality of bioassay sensor modes. Attached Figure Description

[0029] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain the principles of the inventive concept. In the drawings:

[0030] Figure 1 This is a perspective view of a display device according to an exemplary embodiment of the concept of the present invention;

[0031] Figure 2A This is an exploded perspective view of the front surface of a display device according to an exemplary embodiment of the present invention.

[0032] Figure 2B This is an exploded perspective view of the rear surface of a display device according to an exemplary embodiment of the present invention.

[0033] Figure 3A This is a cross-sectional view of a display device according to an exemplary embodiment of the concept of the present invention;

[0034] Figure 3B and Figure 3C This is an exemplary embodiment of the invention, based on the concept of detecting bioassay information from user input. Figure 3A An enlarged cross-sectional view of a portion of the display device shown;

[0035] Figure 4 This is a cross-sectional view of a display panel according to an exemplary embodiment of the concept of the present invention;

[0036] Figure 5 This is an exemplary embodiment of the concept of the present invention. Figure 1 Block diagram of the display device shown;

[0037] Figure 6 This is a plan view of a display panel according to an exemplary embodiment of the concept of the present invention;

[0038] Figure 7 This is a plan view of an input sensor according to an exemplary embodiment of the concept of the present invention;

[0039] Figure 8 A block diagram of a bioassay sensor module according to an exemplary embodiment of the present invention is shown;

[0040] Figure 9 An exemplary embodiment of the invention is shown. Figure 8 An exemplary circuit configuration of the detection sensor shown;

[0041] Figure 10 This is an exemplary embodiment of the concept of the present invention for explanation. Figure 9 An exemplary timing diagram of the operation of the detection sensor shown;

[0042] Figure 11 , Figure 12 and Figure 13 An exemplary arrangement of an ultrasonic sensor for a bioassay sensor according to an exemplary embodiment of the concept of the present invention is shown; and

[0043] Figure 14 This is a flowchart illustrating a method for operating a display device according to an exemplary embodiment of the present invention. Detailed Implementation

[0044] It should be understood that when an element or layer is referred to as being "on," "connected to," or "attached to" another element or layer, it may be directly on, connected to, or attached to that other element, or there may be an intervening third element. When an element or layer is referred to as being directly "on," "directly connected to," or "directly attached to" another element or layer, there may be no intervening element between them.

[0045] The same reference numerals in the accompanying drawings denote the same elements. Furthermore, in order to effectively describe the technical content, the thickness, proportions, and dimensions of the elements are exaggerated in the drawings. The term "and / or" includes any and all combinations of one or more of the related items.

[0046] Terms such as first, second, etc., may be used to describe various components. However, these components should not be limited by these terms. These terms are generally used only to distinguish one element from another. For example, a first component may be referred to as a second component, or similarly, a second component may be referred to as a first component without departing from the scope of this disclosure. As used herein, the singular forms “a,” “an,” and “the” may also be intended to include the plural forms unless the context clearly indicates otherwise.

[0047] Furthermore, terms such as “below,” “under,” “above,” and “above” are used to explain the association of items shown in the accompanying drawings. It should be understood that, in addition to the orientations depicted in the drawings, spatial relative terms are intended to include different orientations of the equipment during use or operation.

[0048] It will be further understood that, when used in this specification, the terms "includes" and / or "including" specify the presence of the described features, integrals, steps, operations, elements, components or combinations thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components or combinations thereof.

[0049] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. Furthermore, it should be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0050] In the following description, exemplary embodiments of the inventive concept will be described with reference to the accompanying drawings.

[0051] Figure 1 This is a perspective view of a display device DD according to an exemplary embodiment of the present invention.

[0052] like Figure 1 As shown in the exemplary embodiment, the display device DD can display the image IM on the display surface DD-IS. Figure 1 In the exemplary embodiment shown, the display surface DD-IS is a surface having a plane defined by a first directional axis DR1 and a second directional axis DR2. The normal direction of the display surface DD-IS (i.e., the thickness direction of the display device DD) is represented by a third directional axis DR3 perpendicular to the first directional axis DR1 and the second directional axis DR2.

[0053] The front (e.g., top) and rear (e.g., bottom) surfaces of each component or element will be distinguished relative to the third directional axis DR3. However, Figure 1 The first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 shown in the exemplary embodiments are merely exemplary. In the following, the first direction, the second direction, and the third direction are directions represented by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3, respectively, and are indicated by the same reference numerals as the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3.

[0054] Although Figure 1 The exemplary embodiments shown include a display surface DD-IS that is planar (e.g., a plane defined in a first direction DR1 and a second direction DR2), but the exemplary embodiments of the present invention are not limited thereto. For example, in another exemplary embodiment, the display surface DD-IS of the display device DD may be curved. For example, in an exemplary embodiment, the display device DD may include a three-dimensional display surface. A three-dimensional display surface includes a plurality of display areas indicating different directions, and a three-dimensional display surface is, for example, a polygonal columnar display surface.

[0055] In an exemplary embodiment of the present invention, the display device DD may be a rigid display device. However, the exemplary embodiments of the present invention are not limited thereto. For example, in another exemplary embodiment, the display device DD may be a flexible display device. A flexible display device may include a foldable display device that can be folded, or a curved display device in which a portion of the display device can be bent.

[0056] exist Figure 1 In the exemplary embodiment shown, the display device DD is integrated into a mobile phone. Electronic modules, camera modules, power modules, etc., mounted on the motherboard can be housed together with the display device DD in a bracket / casing, etc., to form a smartphone, etc. However, the exemplary embodiments of the present invention are not limited thereto, and the display device DD can be integrated into various different electronic devices. For example, in the exemplary embodiment, the display device DD can be applied to large electronic devices such as televisions or monitors, or small or medium-sized electronic devices such as tablet computers, vehicle navigation systems, game consoles, or smartwatches.

[0057] like Figure 1 As shown in the exemplary embodiment, the display surface DD-IS includes an image region DD-DA in which an image IM is displayed, and a border region DD-NDA adjacent to the image region DD-DA. The border region DD-NDA is the area in which no image is displayed.

[0058] like Figure 1 As shown, the image region DD-DA can have a roughly quadrilateral shape. "Roughly quadrilateral shape" includes not only a quadrilateral shape in the mathematical sense, but also a quadrilateral shape in which there are no defined vertices in the vertex region (or corner region) and there are curved boundaries defined therein.

[0059] like Figure 1 As shown in the exemplary embodiments, the border region DD-NDA may surround the image region DD-DA (e.g., on the first direction DR1 and the second direction DR2). However, the exemplary embodiments of the present invention are not limited thereto, and the shapes of the image region DD-DA and the border region DD-NDA may have various different shapes. In another exemplary embodiment, the border region DD-NDA may not be provided on all sides of the image region DD-DA. For example, the border region DD-NDA may be provided only on one side of the image region DD-DA. In another exemplary embodiment, the border region DD-NDA may not be exposed due to the combination of the display device DD and other components of the electronic device.

[0060] A display device DD according to an exemplary embodiment of the present invention can sense user input TC applied from an external source. User input TC can be one of various types of external input, including a part of the user's body, light, heat, or pressure, or a combination of various types of external input. For ease of explanation, user input TC is described herein as a touch input applied by a user's finger to the front surface. However, this particular user input TC is exemplary, and as mentioned above, user input TC can be various different inputs. Furthermore, although user input TC is shown as being applied to the front surface of the display device DD, in other exemplary embodiments, the display device DD can be configured to sense user input applied to the side or rear surface of the display device DD. However, the exemplary embodiments of the present invention are not limited thereto.

[0061] Furthermore, the display device DD according to an exemplary embodiment of the present invention can sense (e.g., detect or identify) a fingerprint as a type of biometric information from externally applied user input TC.

[0062] exist Figure 1 In the exemplary embodiment shown, the display device DD receives a user's fingerprint in the sensing area SA. Figure 1 In the exemplary embodiment shown, the sensing region SA is a rectangular region on the lower part of the image region DD-DA (e.g., on the second direction DR2). However, the position, size, and shape of the sensing region SA are not limited to these limitations. Figure 1The exemplary embodiments shown are as described, and can be modified in various ways. In an exemplary embodiment, the sensing region SA may correspond to at least a portion of the image region DD-DA. For example, the shape, size, and position of the sensing region SA may be the same as the entire image region DD-DA of the display device DD. However, the exemplary embodiments of the present invention are not limited thereto. In another exemplary embodiment, the sensing region SA may be disposed on a side surface or a rear surface of the display device DD.

[0063] Figure 2A This is an exploded perspective view of the front surface of a display device DD according to an exemplary embodiment of the present invention. Figure 2B This is an exploded perspective view of the rear surface of a display device DD according to an exemplary embodiment of the present invention. (Reference) Figure 2A and Figure 2B The display device DD may include a display surface DD-IS, a rear surface DD-RS (e.g., spaced apart from the display surface DD-IS on a third-direction DR3), and a housing including a side surface DD-SS surrounding the space between the display surface DD-IS and the rear surface DD-RS. In another exemplary embodiment, the housing may refer to a structure forming a portion of the display surface DD-IS, the rear surface DD-RS, and the side surface DD-SS. Figure 2A As shown in the exemplary embodiments, the display surface DD-IS can be formed from a window WM, which includes a surface having at least a portion that is substantially transparent. In an exemplary embodiment, the rear surface DD-RS can be formed with a substantially opaque base shell BCS. In an exemplary embodiment, the rear surface DD-RS can be formed from coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel, or magnesium), or a combination of at least two of the above materials. However, the exemplary embodiments of the inventive concept are not limited thereto. The side surface DD-SS can be combined with the display surface DD-IS and the rear surface DD-RS, and formed with a side surface member SSM comprising metal and / or polymer. However, the exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the base shell BCS and the side surface member SSM can be formed integrally and comprise the same material (e.g., a metallic material such as aluminum).

[0064] like Figures 2A to 2B As shown in the exemplary embodiment, the display device DD may include a sound output module AOM, a light emission module LM, a light receiving module LRM, and a camera module CMM.

[0065] In the display device DD, the bracket BRK, circuit board PCB, and battery can be disposed in the space between the window WM and the bottom shell BCS (e.g., on the third-direction DR3). In another exemplary embodiment, the display device DD may omit at least one of the components or include at least one additional component. The mounting surfaces A1 and A2, which house the biometric sensor module SM, can be formed in the space SPC formed on or within the bracket BRK. In an exemplary embodiment, the biometric sensor module SM can be an ultrasonic sensor module that transmits and receives ultrasonic signals.

[0066] like Figure 2A As shown, the bioassay sensor module SM can be disposed on the window WM to face outwards. The bioassay sensor module SM includes a bioassay sensor BS. The bioassay sensor BS can be disposed at a location corresponding to the sensing area SA (e.g., overlapping the sensing area SA on a third direction DR3). In another exemplary embodiment, an opening can be formed in the window WM to expose at least a portion of the bioassay sensor BS. For example, the opening can be formed in the border area DD-NDA.

[0067] In the following, an exemplary embodiment in which the bioassay sensor module SM is configured to face outwards within a window WM of the display device DD will be explained. However, the exemplary embodiments of the present invention are not limited thereto.

[0068] like Figure 2B As shown in the exemplary embodiment, the display device DD may include a bioassay sensor module SM configured to face outwards on the rear surface DD-RS. The bioassay sensor module SM includes a bioassay sensor BS. An opening OP may be formed in the bottom housing BCS. In the exemplary embodiment, the opening OP may have a shape corresponding to the shape of the bioassay sensor BS. The mounting surfaces A1 and A2 in the window WM that houses the bioassay sensor module SM may be formed in the support BRK.

[0069] Figure 3A This is a cross-sectional view of a display device DD according to an exemplary embodiment of the present invention. Figure 3B and Figure 3C yes Figure 3A An enlarged cross-sectional view of a portion of the display device DD shown.

[0070] Figure 3A , Figure 3B and Figure 3C A cross-section defined by the second directional axis DR2 and the third directional axis DR3 is shown. Figure 3A , Figure 3B and Figure 3CThe diagram simply illustrates the components of the display device DD to explain the stacking relationship of the components.

[0071] A display device DD according to an exemplary embodiment of the present invention may include a display module DM, an antireflector RPP, and a window WM. The display module DM includes a display panel DP and an input sensor ISL. At least some of the components of the display panel DP, the input sensor ISL, the antireflector RPP, and the window WM may be formed in a continuous process or may be assembled by adhesive bonding. For example, as... Figure 3A As shown in the exemplary embodiments, the bottom surface of the window WM can be disposed on the top surface of the antireflector RPP. The bottom surface of the antireflector RPP can be disposed on the top surface of the input sensor ISL. The bottom surface of the input sensor ISL can be disposed on the top surface of the display panel DP. However, the exemplary embodiments of the present invention are not limited thereto. In the exemplary embodiments, the adhesive component can be a transparent adhesive component, such as a pressure-sensitive adhesive film (PSA), an optically transparent adhesive film (OCA), or an optically transparent resin (OCR). The adhesive component described below can include typical adhesives or pressure-sensitive adhesives. In the exemplary embodiments, the antireflector RPP and the window WM can be replaced by another component or omitted.

[0072] like Figure 3A As shown in the exemplary embodiment, in the input sensor ISL, antireflector RPP, and window WM, the input sensor ISL, formed by a process continuous with the display panel DP, can be directly disposed on the display panel DP. In this specification, "component B is directly disposed on component A" means that there is no separate adhesive layer / adhesive member between component A and component B. For example, after component A is formed, component B is formed on the base surface provided by component A by a continuous process. Figure 3A As shown in the exemplary embodiment, the antireflector RPP and window WM are "panel type," and the input sensor ISL is "layer type." The antireflector RPP and window WM each include a first adhesive layer ADS1 and a second adhesive layer ADS2 for connecting these panel type elements to the display device DD. The "panel type" includes a base layer providing a base surface formed of, for example, a synthetic resin film, a composite film, a glass substrate, etc., but in the "layer type," the base layer may be omitted. In other words, the components of the "layer type" are disposed on a base surface provided by another component. In an exemplary embodiment of the inventive concept, the antireflector RPP and window WM can be "layer type."

[0073] like Figure 3AAs shown in the exemplary embodiment, the display module DM is formed on a single substrate, and each of the display panel DP and the input sensor ISL is formed on a layer. However, in another exemplary embodiment, the display panel DP and the input sensor ISL may be formed separately with separate substrates and then combined.

[0074] The display panel DP generates images, and the input sensor ISL acquires coordinate information from external inputs (e.g., user input TC). In an exemplary embodiment of the inventive concept, the display device DD may further include a protective member disposed on its bottom surface. The protective member and the display panel DP may be combined using an adhesive member.

[0075] like Figure 3A As shown in the exemplary embodiments, the display device DD according to an exemplary embodiment of the present invention includes an input sensor ISL disposed on the top surface of the display panel DP. However, the exemplary embodiments of the present invention are not limited thereto. For example, in another exemplary embodiment, the display device DD may not include the input sensor ISL.

[0076] The display panel DP according to an exemplary embodiment of the present invention can be a self-emissive display panel. However, the exemplary embodiments of the present invention are not particularly limited thereto. For example, the display panel DP can be an organic light-emitting display panel or a quantum dot light-emitting display panel. Panels are distinguished according to the constituent materials of the light-emitting elements. The light-emitting layer of an organic light-emitting display panel includes organic light-emitting materials. The light-emitting layer of a quantum dot light-emitting display panel can include quantum dots, quantum rods, etc. Hereinafter, for ease of explanation, the display panel DP will be described as an organic light-emitting display panel.

[0077] The antireflector RPP reduces the reflectivity of external light incident from the upper side of the window WM. An exemplary embodiment of the antireflector RPP according to the present invention may include a phase retarder and a polarizer. The phase retarder may be film-type or liquid crystal coated type, and includes a λ / 2 phase retarder and / or a λ / 4 phase retarder. The polarizer may also be film-type or liquid crystal coated type. The film-type may include a stretchable synthetic resin film, and the liquid crystal coated type may include liquid crystals arranged in a specified array. The phase retarder and polarizer may also include a protective film. The phase retarder and polarizer themselves or the protective film may be defined as the base layer of the antireflector RPP. However, exemplary embodiments of the present invention are not limited thereto.

[0078] An antireflective reflector RPP according to an exemplary embodiment of the present invention may include a color filter. The color filter has a specified array. The array of the color filter may be determined taking into account the emission colors of the pixels included in the display panel DP. The antireflective reflector RPP may also include a black matrix adjacent to the color filter.

[0079] An antireflector RPP according to an exemplary embodiment of the present invention may include a destructive interference structure. For example, in an exemplary embodiment, the destructive interference structure may include a first reflective layer and a second reflective layer disposed on different layers. The first reflected light and the second reflected light reflected by the first reflective layer and the second reflective layer, respectively, may destructively interfere with each other, and thus reduce the reflectivity of external light.

[0080] A window WM according to an exemplary embodiment of the present invention includes a base layer WM-BS and a light-shielding pattern WM-BZ. The base layer WM-BS may include a glass substrate and / or a synthetic resin film, etc. The base layer WM-BS is not limited to a single layer. For example, the base layer WM-BS may include two or more films combined by adhesive members.

[0081] In the bezel region DD-NDA, the light-shielding pattern WM-BZ overlaps with the base layer WM-BS (e.g., on the third-direction DR3). The light-shielding pattern WM-BZ is disposed on the rear surface of the base layer WM-BS, and the light-shielding pattern WM-BZ can substantially define the bezel region DD-NDA of the display device DD. The area where the light-shielding pattern WM-BZ is not disposed can define the image region DD-DA of the display device DD. Regarding the window WM, the area where the light-shielding pattern WM-BZ is disposed is defined as the light-shielding area of ​​the window WM, and the area where the light-shielding pattern WM-BZ is not disposed is defined as the transmissive area of ​​the window WM.

[0082] In an exemplary embodiment, the light-shielding pattern WM-BZ may have a multi-layer structure. The multi-layer structure may include colored layers and non-colored (e.g., black) light-shielding layers. In an exemplary embodiment, the colored layers and non-colored light-shielding layers may be formed by deposition, printing, and coating processes. Although not shown separately, the window WM may also include a functional coating disposed on the front surface of the base layer WM-BS (e.g., the top surface on the third-direction DR3). In an exemplary embodiment, the functional coating may include at least one layer selected from anti-fingerprint layers, anti-reflective layers, hard coatings, etc.

[0083] A bioassay sensor BS can be mounted on the bottom surface of the display panel DP. The bioassay sensor BS is positioned relative to... Figure 1The sensing area SA shown corresponds to the location. In an exemplary embodiment, the bioassay sensor BS can be an ultrasonic sensor that transmits ultrasonic signals that can penetrate the display panel DP, the input sensor ISL, the antireflector RPP, and the window WM, and can receive feedback ultrasonic signals. However, the exemplary embodiments of the present invention are not limited thereto, and in other embodiments, the bioassay sensor BS can be a sensor other than an ultrasonic sensor.

[0084] The display device DD can operate in a fingerprint sensing mode to sense a fingerprint from user input TC. A fingerprint is one of many types of biometric information about a user. In an exemplary embodiment, the fingerprint sensing mode can be an operating mode used to support user authentication functions, such as providing access to secure connections, various financial payments, user registration, etc. However, the exemplary embodiments of the present invention are not limited thereto.

[0085] The display device DD can operate in a skin measurement mode to measure various characteristics of the user's skin from the user's input TC as another type of biometric information. For example, the skin measurement mode could be a cosmetic treatment mode used to measure skin conditions (such as skin elasticity, moisture, wrinkles, etc.). However, exemplary embodiments of the inventive concept are not limited thereto, and the display device DD can measure other skin conditions of the user from the user's input TC in the skin measurement mode.

[0086] The display device DD can operate in either a fingerprint sensing mode or a skin measurement mode, depending on the user-selected operating mode or the operating mode set by the application. Furthermore, the biometric sensor BS can operate according to the set operating mode (i.e., fingerprint sensing mode and skin measurement mode). However, exemplary embodiments of the present invention are not limited thereto. For example, in an exemplary embodiment, the display device DD can be configured to operate in multiple different modes to sense different biometric information of the user from the user input TC. For example, the display device DD can be configured to operate in fingerprint sensing mode and multiple skin measurement modes to measure different skin conditions of the user.

[0087] Figure 3B This is a cross-sectional view illustrating the operation of the biometric sensor BS when the display device DD operates in fingerprint sensing mode, according to an exemplary embodiment of the present invention.

[0088] refer to Figure 3BIn the exemplary embodiment shown, the biometric sensor BS generates a first transmitted signal TX_UF in fingerprint sensing mode. In this exemplary embodiment, the first transmitted signal TX_UF can be an ultrasonic signal with a frequency exceeding the audible range, in the range of approximately 10 MHz to approximately 20 MHz. However, the frequency of the first transmitted signal TX_UF is not limited to this, and the frequency of the ultrasonic signal can be selected within any frequency range that can sense the fingerprint entered by the user TC.

[0089] The first transmitted signal TX_UF can be reflected by the ridges TC_R and valleys TC_V of the fingerprint entered by the user TC, and is transmitted to the biometric sensor BS as the first received signal RX_UF. The biometric sensor BS can be configured to sense the difference between the reflective characteristics of the ridges TC_R and valleys TC_V of the fingerprint from the first received signal RX_UF, and can identify the shape of the fingerprint based on the reflective characteristics detected in the first received signal RX_UF.

[0090] Figure 3C This is a cross-sectional view illustrating the operation of the bioassay sensor BS when the display device DD operates in skin measurement mode, according to an exemplary embodiment of the present invention.

[0091] refer to Figure 3C In skin measurement mode, the biometric sensor BS generates a second transmitted signal TX_US. In an exemplary embodiment, the second transmitted signal TX_US can be an ultrasonic signal with a frequency exceeding the audible range, in the range of approximately 10 kHz to approximately 50 kHz. However, the frequency of the second transmitted signal TX_US is not limited to this and can be any frequency within the frequency range from the user input TC for sensing skin conditions. For example, the second transmitted signal TX_US can be configured to have a frequency that can be transmitted to the skin. In an exemplary embodiment, the second transmitted signal TX_US can vary based on the specific skin condition to be sensed. In an exemplary embodiment, the frequency of the second transmitted signal TX_US, which senses skin conditions from the user input TC, is lower than the frequency of the first transmitted signal TX_UF used for sensing fingerprints (see...). Figure 3B (frequency)

[0092] The second transmitted signal TX_US can be reflected by cells CC1 and CC2 in the skin of the user input TC and transmitted as the second received signals RX_US1 and RX_US2 to the bioassay sensor BS. The bioassay sensor BS can be configured to sense the difference between the reflectance characteristics of the second received signals RX_US1 and RX_US2 based on the degree of cell density, and to sense the skin condition.

[0093] Figure 4This is a cross-sectional view of a display panel DP according to an exemplary embodiment of the present invention.

[0094] like Figure 4 As shown in the exemplary embodiment, the display panel DP includes a base layer BL, a circuit element layer DP-CL disposed on the base layer BL, a display element layer DP-OLED disposed on the circuit element layer DP-CL, and an upper insulating layer TFL disposed on the display element layer DP-OLED. Figure 1 The image area DD-DA and the border area DD-NDA shown in the diagram correspond to the display area DP-DA and the non-display area DP-NDA, which may be defined on the display panel DP. In this specification, "one area / part corresponds to another area / part" means "overlapping with each other" (e.g., overlapping with each other on a third-direction DR3), but is not limited to having the same area and / or the same shape.

[0095] The base layer BL may include at least one synthetic resin film. For example, in an exemplary embodiment, the base layer BL may include a glass substrate, a metal substrate, or an organic / inorganic composite material substrate. However, the exemplary embodiments of the present invention are not limited thereto.

[0096] The circuit element layer DP-CL includes circuit elements and at least one insulating layer. The insulating layer includes at least one organic layer and at least one inorganic layer. The circuit elements include signal lines and pixel driving circuits, etc.

[0097] The display element layer of a DP-OLED includes at least organic light-emitting diodes as light-emitting elements. The display element layer of a DP-OLED may also include organic layers, such as pixel-defining layers.

[0098] The upper insulating layer TFL comprises multiple thin films. In an exemplary embodiment, some of the thin films are configured to improve optical efficiency, and some of the thin films are configured to protect the organic light-emitting diode. A detailed description of the upper insulating layer TFL will be provided later.

[0099] Figure 5 This is an exemplary embodiment of the concept of the present invention. Figure 1 The block diagram of the display device DD shown is shown.

[0100] refer to Figure 5 In an exemplary embodiment, the display device DD may include a display module DM, a bioassay sensor module SM, a power module PM, a first electronic module EM1, and a second electronic module EM2. The display module DM, the bioassay sensor module SM, the power module PM, the first electronic module EM1, and the second electronic module EM2 may be electrically connected to each other.

[0101] Figure 5The display module DM shown in the exemplary embodiment may include Figure 3A The diagram shows the display panel DP and the input sensor ISL. Additionally, the display module DM may also include a panel driver circuit PDC and an input sensing circuit ISC.

[0102] The biometric sensor module SM includes a biometric sensor BS, a fingerprint readout circuit, and a skin measurement circuit. The biometric sensor BS may include multiple ultrasonic sensing pixels for sensing information about the user's fingerprints and skin.

[0103] The power module PM provides the necessary power for the entire operation of the display device DD. The power module PM may include a typical battery module.

[0104] The first electronic module EM1 and the second electronic module EM2 include various functional modules for operating the display device DD. In an exemplary embodiment, the first electronic module EM1 can be directly mounted on a motherboard electrically connected to the display module DM, or it can be mounted on a separate board for electrical connection to the motherboard via a connector.

[0105] The first electronic module EM1 may include a control module CM, a wireless communication module TM, an image input module IIM, a voice input module AIM, a memory MM, and an external interface IF. In an exemplary embodiment, some of the above modules may not be mounted on the motherboard, but may be electrically connected to the motherboard via a flexible circuit board.

[0106] The control module CM controls the entire operation of the display device DD. The control module CM may be a microprocessor. For example, the control module CM can activate or deactivate the display module DM. In an exemplary embodiment, the control module CM can control other modules, such as the image input module IIM and / or the voice input module AIM, based on touch signals received from the display module DM. In an exemplary embodiment, the control module CM can perform user authentication based on signals received from the biometric sensor module SM in fingerprint sensing mode. The control module CM can also diagnose and / or determine the user's skin condition based on signals received from the biometric sensor module SM in skin measurement mode.

[0107] The wireless communication module TM can transmit / receive wireless signals to or from another terminal, such as via Bluetooth or WiFi. For example, the wireless communication module TM can transmit / receive voice signals to or from a repeater using a communication line. The wireless communication module TM includes a transmitting section TM1 for modulating the signal to be transmitted and transmitting the modulated signal, and a receiving section TM2 for demodulating the received signal.

[0108] The image input module (IIM) processes image signals and converts them into image data that can be displayed on the display module (DM). The audio input module (AIM) receives external audio signals through a microphone in recording mode or voice recognition mode and converts the received audio signals into electronic voice data.

[0109] The external interface IF can be an interface that connects to at least one of an external charger, a wired / wireless data port, and a card slot (e.g., a memory card or a SIM / UIM card).

[0110] The second electronic module EM2 may include a sound output module AOM, a light-emitting module LM, a light-receiving module LRM, and a camera module CMM, etc. These components can be directly mounted on the motherboard or mounted on a separate board and electrically connected to the display module DM or the first electronic module EM1 via connectors.

[0111] The audio output module AOM can perform conversion on audio data received from the wireless communication module TM, or on audio data stored in the memory MM. The audio output module AOM can then output the converted audio data to an external device.

[0112] A light-emitting module (LM) generates and outputs light. In an exemplary embodiment, the LM may output infrared light. The LM may include LED elements. A light-receiving module (LRM) senses infrared light. The LRM may be activated when a specified level or higher of infrared light is sensed. In an exemplary embodiment, the LRM may include a CMOS sensor. However, the exemplary embodiments of the present invention are not limited thereto. After the infrared light generated by the LM is output, it may be reflected by an external object (e.g., a user's finger or face), and the reflected infrared light may be incident on the LRM. A camera module (CMM) captures external images.

[0113] Figure 6 This is a plan view of a display panel DP according to an exemplary embodiment of the present invention.

[0114] like Figure 6 As shown in the exemplary embodiment, the display panel DP may include a driving circuit SDC, a plurality of signal lines SGL (hereinafter referred to as signal lines), a plurality of signal pads DP-PD and ISL-PD (hereinafter referred to as signal pads), and a plurality of pixels PX (hereinafter referred to as pixels), wherein the plurality of signal pads DP-PD and ISL-PD are, for example, a first type of signal pad DP-PD connected to data line DL, power line PL and control signal line CSL, and a second type of signal pad ISL-PD connected to auxiliary line SSL.

[0115] The driving circuit SDC may include a scan driving circuit. The scan driving circuit generates multiple scan signals (hereinafter referred to as scan signals) and sequentially outputs the scan signals to multiple scan lines SL (hereinafter referred to as scan lines). The scan driving circuit may also output another control signal to the pixel driving circuit of pixel PX.

[0116] The scan driving circuit may include a plurality of transistors formed using the same process as the pixel driving circuit of the pixel PX. In an exemplary embodiment, the transistors may be formed using a low-temperature polycrystalline silicon (LTPS) process or a low-temperature polycrystalline oxide (LTPO) process. However, the exemplary embodiments of the present invention are not limited thereto.

[0117] The signal lines SGL include scan lines SL, data lines DL, power lines PL, and control signal lines CSL. Each of the scan lines SL and each of the data lines DL is connected to the corresponding pixel PX in the pixel PX. The power line PL is connected to the pixel PX. The control line CSL provides control signals to the scan drive circuitry.

[0118] like Figure 6 As shown in the exemplary embodiment, the signal line SGL may also include an auxiliary line SSL. The auxiliary line SSL is connected to the input sensor ISL (see [link to example]). Figure 3A The signal line is SSL. However, the exemplary embodiments of the present invention are not limited thereto, and in another exemplary embodiment of the present invention, the auxiliary line SSL may be omitted.

[0119] Signal lines (SGLs) can include multiple parts set on different layers. Figure 6 An exemplary diagram shows a data line DL comprising four sections P1 to P4 and an auxiliary line SSL comprising two sections P10 and P20. The four sections P1 to P4 can be connected via contact holes CNT, and the two sections P10 and P20 can also be connected via contact holes CNT. The first section P10 of the auxiliary line SSL is connected via contact holes CNT to the input sensor ISL (see [link to relevant documentation]), which will be described later. Figure 7 ) sensing line.

[0120] The signal pads may include a first type of signal pad DP-PD connected to the data line DL, power line PL, and control signal line CSL, and a second type of signal pad ISL-PD connected to the auxiliary line SSL. The first type of signal pad DP-PD and the second type of signal pad ISL-PD may be positioned adjacent to a pad area NDA-PA defined within a portion of the non-display area DP-NDA. In an exemplary embodiment, the layered structure or constituent materials of the signal pads DP-PD and ISL-PD are indistinguishable from each other and can be formed using the same process.

[0121] The display area DP-DA can be defined as the area in which pixels PX are disposed. Multiple electronic components are disposed within the display area DP-DA. These electronic components include organic light-emitting diodes (OLEDs) disposed within the pixels PX and pixel driving circuitry connected thereto. The driving circuitry SDC, signal lines SGL, signal pads DP-PD and ISL-PD, and the pixel driving circuitry can be included in the circuit element layer DP-CL (see [link to circuit element layer]). Figure 4 )middle.

[0122] In an exemplary embodiment, pixel PX may include a first transistor T1, a second transistor T2, a capacitor CP, and an organic light-emitting diode (OLED). Although Figure 6 The pixel driving circuit shown includes only a first transistor T1 and a second transistor T2, but the exemplary embodiments of the present invention are not limited thereto. In other exemplary embodiments, the pixel driving circuit may include various numbers of transistors. The first transistor T1 is connected to the scan line SL and the data line DL. The organic light-emitting diode (OLED) receives a power supply voltage supplied via the power line PL.

[0123] A panel driver circuit (PDC) for controlling the operation of the display panel (DP) can be housed in a circuit board (PCB). Furthermore, a bioassay sensor control circuit (BSC) and an input sensing circuit (ISC) for controlling the input sensor (ISL) can also be housed in the PCB. In an exemplary embodiment, each of the panel driver circuit (PDC), the input sensing circuit (ISC), and the bioassay sensor control circuit (BSC) can be mounted separately in a circuit board of an integrated chip type. In another exemplary embodiment of the inventive concept, the panel driver circuit (PDC), the input sensing circuit (ISC), and the bioassay sensor control circuit (BSC) can be mounted in a circuit board (PCB) that is a single integrated chip. The PCB may include a first circuit board pad (PCB-PD1) electrically connected to signal pads DP-PD and ISL-PD. The PCB may also include signal lines for connecting the first circuit board pad (PCB-PD1), the panel driver circuit (PDC), and / or the input sensing circuit (ISC). Furthermore, the first circuit board pad (PCB-PD1) may include at least one output pad and at least one input pad.

[0124] In an exemplary embodiment, the first circuit board pad PCB-PD1 and the signal pads DP-PD and ISL-PD of the display panel DP can be directly connected. In another exemplary embodiment, the first circuit board pad PCB-PD1 and the signal pads DP-PD and ISL-PD can be electrically connected via a connection plate such as an anisotropic conductive film.

[0125] In another exemplary embodiment, the panel driver circuit PDC may not be mounted on the circuit board PCB, but may be mounted in the non-display area DP-NDA of the display panel DP.

[0126] The circuit board (PCB) may also include electrical connections to the bioassay sensor module (SM), which will be described later (see [link to PCB)). Figure 8 The second circuit board pad PCB-PD2 is the sensor pad BS-PD.

[0127] The second circuit board pad PCB-PD2 and the sensor pad BS-PD of the bioassay sensor module SM can be directly connected. In another exemplary embodiment, the sensor pad BS-PD and the second circuit board pad PCB-PD2 can be electrically connected via a connection plate such as an isotropic conductive film.

[0128] The biometric sensor control circuit (BSC) sends signals to control the operation of the biometric sensor module (SM) via the second circuit board pad PCB-PD2. In fingerprint sensing mode, the BSC can generate a fingerprint signal based on signals received from the biometric sensor module (SM). Furthermore, in skin measurement mode, the BSC can generate a skin measurement signal based on signals received from the biometric sensor module (SM).

[0129] Figure 6 A portion of the display panel DP shown may be bent. For example, in an exemplary embodiment, a portion of the non-display area DP-NDA may be bent based on a bending axis parallel to the first direction DR1. The bending axis may be defined as overlapping with the second portion P2 of the data line DL and the auxiliary line SSL. However, exemplary embodiments of the inventive concept are not limited thereto.

[0130] Figure 7 This is a plan view of an input sensor ISL according to an exemplary embodiment of the present invention.

[0131] refer to Figure 7 In an exemplary implementation, the input sensor ISL can be set Figure 6 The display panel DP is shown. The input sensor ISL can sense user input TC (see...). Figure 1 The input sensor ISL can be used to obtain the position and intensity of external touch input. It may include a sensing area ISL-DA and a wiring area ISL-NDA on a plane (e.g., in a first direction DR1 and a second direction DR2). The sensing area ISL-DA may be defined as the region in which a first sensing electrode SE1 and a second sensing electrode SE2 are disposed. Figure 7In the exemplary embodiment shown, the wiring region ISL-NDA may be defined along the edge of the sensing region ISL-DA. The sensing region ISL-DA and the wiring region ISL-NDA may respectively correspond to Figure 6 The display panel DP shown includes the display area DP-DA and the non-display area DP-NDA.

[0132] In an exemplary embodiment, the input sensor ISL may be a capacitive touch sensor. Either the first sensing electrode SE1 and the second sensing electrode SE2 receives a drive signal, and the other of the first sensing electrode SE1 and the second sensing electrode SE2 outputs the amount of capacitance change between the first sensing electrode SE1 and the second sensing electrode SE2 as a sensing signal.

[0133] like Figure 7 As shown in the exemplary embodiment, each of the first sensing electrodes SE1 has a shape extending in a first direction DR1. Furthermore, the first sensing electrodes SE1 may be arranged in a second direction DR2, in a sequential manner. The first sensing electrodes SE1 may include a plurality of first sensing patterns SP1 and a plurality of first connection patterns CP1.

[0134] like Figure 7 As shown in the exemplary embodiment, each of the second sensing electrodes SE2 has a shape extending in the second direction DR2. Furthermore, the second sensing electrodes SE2 may be arranged in the first direction DR1 in a sequential manner. The second sensing electrodes SE2 may include a plurality of second sensing patterns SP2 and a plurality of second connection patterns CP2.

[0135] The first sensing lines TL1-1 to TL1-a may include the same number of sensing lines as the first sensing electrode SE1. The first sensing lines TL1-1 to TL1-a may be connected to at least one of the two terminals of the first sensing electrode SE1. The second sensing lines TL2-1 to TL2-b may include the same number of sensing lines as the second sensing electrode SE2. The second sensing lines TL2-1 to TL2-b may be connected to at least one of the two terminals of the second sensing electrode SE2.

[0136] The first sensing lines TL1-1 to TL1-a can be connected via contact holes CNT to the pad area NDA-PA (see...). Figure 6 The auxiliary line SSL on one side (such as the first lateral side on the first direction DR1) (see) Figure 6 Part of the second sensing lines TL2-1 to TL2-b can be connected via contact holes CNT to the pad area NDA-PA (see...). Figure 6 On the other side (such as the second lateral side on the first direction DR1), the auxiliary line SSL (see...) Figure 6 Part of ).

[0137] The contact hole CNT penetrates the insulating layer between the auxiliary line SSL and the first sensing lines TL1-1 to TL1-a and the second sensing lines TL2-1 to TL2-b.

[0138] Figure 8 This is an exemplary block diagram of a bioassay sensor module SM according to an exemplary embodiment of the present invention.

[0139] refer to Figure 8 In the exemplary embodiment shown, the bioassay sensor module SM includes a bioassay sensor BS, a selection circuit SELC, and an output circuit OUTC. The bioassay sensor BS includes multiple detection sensors UPX. Figure 8 As shown in the exemplary embodiment, multiple detection sensors UPX can be arranged in a matrix array, wherein the detection sensors UPX are arranged in a first direction DR1 and a second direction DR2. However, the size and arrangement of the detection sensors UPX are not limited to... Figure 8 The exemplary embodiment shown illustrates that the size and arrangement of the plurality of detection sensor UPXs can be varied in various ways. For example, some of the detection sensor UPXs may be larger or smaller than the size of the others. Furthermore, for each row or column, the detection sensor UPXs may be arranged alternately in a zigzag pattern. In the exemplary embodiment, each of the plurality of detection sensor UPXs may be an ultrasonic sensor.

[0140] Each of the multiple detection sensors in the UPX outputs an ultrasonic signal, and receives signals due to user input TC (see [link]). Figure 1 The feedback ultrasonic signal is reflected from the user's finger.

[0141] The selection circuit SELC can respond to the biometric sensor control circuit BSC (see [reference]) via the sensor pad BS-PD of the biometric sensor module SM and the first sensing control line SCL1. Figure 6 The received control signal is used to output the control signal for controlling the detection sensor UPX to the first control line CL1, the second control line CL2 and the third control line CL3.

[0142] The output circuit OUTC receives the biometric sensing signal sensed by the detection sensor UPX via biometric sensing lines SL1 to SLm. The output circuit OUTC can convert the received biometric sensing signal into a first received signal RX_UF (see [link to relevant documentation]). Figure 3B ) or the second received signal RX_US (see Figure 3CThe converted signal is then provided to the bioassay sensor control circuit BSC via the second sensing control line SCL2 and the sensor pad BS-PD (see...). Figure 6 ).

[0143] Figure 9 An exemplary embodiment illustrating the concept of the present invention is shown. Figure 8 An exemplary circuit diagram of the circuit configuration for any of the detection sensors UPX shown.

[0144] refer to Figure 9 In an exemplary embodiment, the detection sensor UPX is connected to a first control line CL1, a second control line CL2, a third control line CL3, and a biometric sensing line SL1. The detection sensor UPX includes an ultrasonic transducer UT, a first transistor T1, a second transistor T2, a third transistor T3, a diode D1, a capacitor C1, and a current source IC1.

[0145] In an exemplary embodiment, the ultrasonic transducer UT may be a piezoelectric micromechanical ultrasonic transducer (PMUT). The piezoelectric stack may include a layer of piezoelectric material.

[0146] The ultrasonic transducer (UT) can be configured to operate in modes corresponding to multiple frequency ranges. For example, in some exemplary embodiments, the ultrasonic transducer (UT) can be configured to operate in at least one skin measurement mode (or low-frequency mode) corresponding to a first frequency (e.g., about 10 MHz to about 20 MHz) or a second frequency (e.g., about 10 kHz to about 50 kHz). The ultrasonic transducer (UT) can sense a fingerprint from a user input TC in fingerprint sensing mode. Furthermore, the ultrasonic transducer (UT) can measure skin condition from a user input TC in skin measurement mode.

[0147] The operating frequency of the ultrasonic transducer (UT) is not limited to the range mentioned above and can be changed in various ways if needed. Furthermore, the ultrasonic transducer (UT) is not limited to only two modes: fingerprint sensing mode and skin measurement mode, and can generate ultrasonic signals of various frequencies in various different modes.

[0148] An ultrasonic transducer UT is disposed between a first electrode E1 and a second electrode E2, and may include a piezoelectric material layer (or piezoelectric layer) disposed on one of the upper and lower portions of a bioassay sensor BS. The ultrasonic transducer UT may include a capacitor CP due to the capacitance of the piezoelectric layer. For example, the capacitor CP may have capacitance between the receiver bias electrode R_BIAS (or the first electrode E1) and the second electrode E2. The first electrode E1 of the ultrasonic transducer UT may be referred to as the lower electrode, and the second electrode E2 may be referred to as the upper electrode. The second electrode E2 of the ultrasonic transducer UT is connected to a first node N1.

[0149] In an exemplary embodiment, each of the first transistor T1, the second transistor T2, and the third transistor T3 may be an NMOS transistor. In another exemplary embodiment, at least one of the first transistor T1, the second transistor T2, and the third transistor T3 may be a PMOS transistor.

[0150] In an exemplary embodiment, the first transistor T1 may be a reset transistor for resetting the voltage level of the first node N1 to the diode bias voltage D_BIAS. The first transistor T1 includes a first terminal connected to the first node N1, a second terminal connected to a second control line CL2 through which the diode bias voltage D_BIAS is received, and a gate terminal connected to a first control line CL1 through which the reset signal RST is received.

[0151] Diode D1 can be a PN type diode. Diode D1 is connected between the first node N1 and the second control line CL2, through which it receives the diode bias voltage D_BIAS. The anode of diode D1 can be biased by the diode bias voltage D_BIAS.

[0152] Capacitor C1 is connected between the first node N1 and the ground voltage terminal VSS.

[0153] The second transistor T2 includes a first terminal through which a power supply voltage VDD is received, a second terminal connected to the first terminal of the third transistor T3, and a gate terminal connected to the first node N1.

[0154] The third transistor T3 includes a first terminal connected to the second terminal of the second transistor T2, a second terminal connected to the current source IC1, and a gate terminal connected to the third control line CL3 through which the selection signal SEL is received. The second terminal of the third transistor T3 is also connected to the biometric sensing line SL1. Furthermore, the voltage of the biometric sensing line SL1 can be provided to the output circuit OUTC as a receive signal RX1 (see [link to circuit description]). Figure 8 ).

[0155] Current source IC1 is connected between the second terminal of the third transistor T3 and the ground voltage terminal VSS.

[0156] Figure 10 This is an exemplary embodiment of the concept of the present invention for explanation. Figure 9 An exemplary timing diagram of the operation of the detection sensor UPX shown.

[0157] refer to Figure 9 and Figure 10 When the reset signal RST transitions to an active level (e.g., high level) at the first time t1 of the first sensing frame SF1, the first transistor T1 is turned on. When the first transistor T1 is turned on, the first node N1 can be reset to the diode bias voltage D_BIAS. Since the diode bias voltage D_BIAS has an inactive level (e.g., low level or ground voltage level) when the first transistor T1 is turned on, the first node N1 can be reset to an inactive level (e.g., low level or ground voltage level).

[0158] After the reset signal RST transitions from an active level to an inactive level (e.g., low level) at the second time t2, the ultrasonic transducer UT outputs a transmit signal TX between the fourth time t4 and the fifth time t5 when the diode bias voltage D_BIAS transitions to an active level (e.g., high level or power supply voltage level) at the third time t3.

[0159] As described above, the ultrasonic transducer UT outputs a transmission signal TX corresponding to a first frequency in fingerprint sensing mode and a transmission signal TX corresponding to a second frequency in skin measurement mode. The first frequency can be a frequency in the range of about 10 MHz to about 20 MHz, and the second frequency can be a frequency in the range of about 10 kHz to about 50 kHz. For example, the first and second frequencies can be set to any frequency within the exemplary range, but the frequencies do not change to different frequencies within the specified range during operation. For example, in an exemplary embodiment, the ultrasonic transducer UT can output a first transmission signal TX_UF of about 12 MHz in fingerprint sensing mode and a second transmission signal TX_US of about 50 kHz in skin measurement mode.

[0160] After the diode bias voltage D_BIAS transitions to an inactive level at the sixth time t6, the voltage level of the first node N1 is determined based on the ultrasonic received signal received by the ultrasonic transducer UT.

[0161] The second transistor T2 can be turned on / off depending on the voltage level of the first node N1. When the selection signal SEL transitions to an active level (e.g., high level) at the seventh time t7, the third transistor T3 turns on, and the receive signal RX1 corresponding to the first node N1 is provided to the output circuit OUTC (see [link to circuit diagram]). Figure 8 ).

[0162] When the reset signal RST transitions to an active level (e.g., high level) again in the second sensing frame SF2, the first node N1 can be reset to an inactive level (e.g., low level or ground voltage level) of the diode bias voltage D_BIAS.

[0163] Figure 11 , Figure 12 and Figure 13 The arrangement of ultrasonic sensors UPXa and UPXb of bioassay sensors BS1, BS2 and BS3 according to an exemplary embodiment of the present invention is shown.

[0164] refer to Figure 11 The bioassay sensor BS1 includes multiple first detection sensors UPXa and multiple second detection sensors UPXb. The first detection sensors UPXa and the second detection sensors UPXb can be arranged in a matrix array in a plane defined by a first direction DR1 and a second direction DR2. Furthermore, the first detection sensors UPXa and the second detection sensors UPXb can be arranged alternately along the first direction DR1 and the second direction DR2.

[0165] The first detection sensor UPXa is a sensor capable of generating an ultrasonic signal at a first frequency (e.g., about 10 MHz to about 20 MHz) suitable for fingerprint detection. The second detection sensor UPXb is a sensor capable of generating an ultrasonic signal at a second frequency (e.g., about 10 kHz to about 50 kHz) suitable for skin condition detection.

[0166] The first detection sensor UPXa can output a first transmission signal TX_UF at a first frequency in fingerprint sensing mode and receive a feedback ultrasonic signal including fingerprint information. The second detection sensor UPXb can output a second transmission signal TX_US at a second frequency in skin measurement mode and receive a feedback ultrasonic signal including skin condition information.

[0167] exist Figure 11In the exemplary embodiment shown, the first detection sensor UPXa and the second detection sensor UPXb are depicted as rectangular shapes having the same dimensions (e.g., areas in the first direction DR1 and the second direction DR2). However, the exemplary embodiments of the inventive concept are not limited thereto, and the first detection sensor UPXa and the second detection sensor UPXb may have different shapes and dimensions (e.g., areas in the first direction DR1 and the second direction DR2). The shape and area of ​​each of the first detection sensor UPXa and the second detection sensor UPXb may be substantially similar to that of the ultrasonic transducer UT (see [link to original text]). Figure 9 The shape and area of ​​).

[0168] Furthermore, the shape and arrangement of the first detection sensor UPXa and the second detection sensor UPXb can be changed in various ways. In an exemplary embodiment, the biometric sensor BS1 may include a greater number of first detection sensors UPXa than the second detection sensors UPXb to enhance fingerprint sensing characteristics in fingerprint sensing mode.

[0169] refer to Figure 12 In an exemplary embodiment, the bioassay sensor BS2 includes a first detection sensor UPXa and a second detection sensor UPXb. The first detection sensor UPXa and the second detection sensor UPXb may each have a circular shape and different dimensions (e.g., area in the first direction DR1 and the second direction DR2). For example, the first detection sensor UPXa for generating a first emission signal TX_UF may have a smaller size than the second detection sensor UPXb for generating a second emission signal TX_US. Typically, with the ultrasonic transducer UT (see...) Figure 9 The frequency of the generated ultrasonic signal increases, and the size of the ultrasonic transducer UT (e.g., the area in the first direction DR1 and the second direction DR2) decreases. Furthermore, when the ultrasonic transducer UT has a circular shape, the wavelength of the ultrasonic signal is unaffected by the direction of illumination when it is output.

[0170] exist Figure 12 In the exemplary embodiment shown, a first detection sensor UPXa is disposed among four adjacent (e.g., adjacent in the first direction DR1 and the second direction DR2) second detection sensors UPXb. By minimizing the spacing between the first detection sensors UPXa, the spacing between the second detection sensors UPXb, and the spacing between the first detection sensors UPXa and the second detection sensors UPXb, and by arranging the maximum number of first detection sensors UPXa and second detection sensors UPXb within a limited area, the resolution of the signals sensed by the first detection sensors UPXa and the second detection sensors UPXb can be improved.

[0171] refer to Figure 13 In the exemplary embodiment shown, the bioassay sensor BS3 includes a first detection sensor UPXa and a second detection sensor UPXb. The first detection sensor UPXa and the second detection sensor UPXb may each have a circular shape and different dimensions (e.g., area in the first direction DR1 and the second direction DR2). For example, the second detection sensor UPXb for generating the second emission signal TX_US is larger than the first detection sensor UPXa for generating the first emission signal TX_UF. The first detection sensor UPXa may be disposed around the second detection sensor UPXb.

[0172] The number of first detection sensors UPXa in the bioassay sensor BS3 can be greater than the number of second detection sensors UPXb. Therefore, with Figure 12 Compared to the bioassay sensor BS2 shown in the exemplary embodiment, Figure 13 The biometric sensor BS3 shown in the exemplary embodiment can perform higher resolution fingerprint sensing.

[0173] Figure 14 This is a flowchart illustrating a method for operating a display device according to an exemplary embodiment of the present invention.

[0174] For ease of explanation, references will be provided. Figure 6 and Figure 8 Provides operation for display devices.

[0175] refer to Figure 6 , Figure 8 and Figure 14 In block S100, the biometric sensor control circuit BSC of the display device DD activates the biometric sensor module SM in response to a request from the application. For example, activation of the biometric sensor module SM may include a series of operations for controlling the supply of power to the biometric sensor module SM to be activated and for initializing control signals.

[0176] In block S110, the biometric sensor control circuit BSC of the display device DD determines the operating mode. For example, when the request from the application is a fingerprint sensing mode for user authentication, the biometric sensor control circuit BSC sends a mode signal to the biometric sensor BS, causing the biometric sensor BS to operate in fingerprint sensing mode.

[0177] In block S120, when a mode signal from the biometric sensor control circuit BSC indicates a fingerprint sensing mode, the biometric sensor BS controls the detection sensor UPX to output a first transmission signal TX_UF. In an exemplary embodiment, the first transmission signal TX_UF may be an ultrasonic signal at a first frequency (about 10 MHz to about 20 MHz) suitable for fingerprint sensing.

[0178] In box S122, the detection sensor UPX is detected from the sensing area SA (see...) Figure 1 The user input TC in the ) is received by the ridge and valley (see respectively) Figure 3B The signals reflected by “TC_R” and “TC_V” are used to provide the received signals RX1 to RXm as the first received signal RX_UF to the bioassay sensor control circuit BSC.

[0179] In block S124, the biometric sensor control circuit BSC can provide user authentication information to the application based on the first received signal RX_UF. However, exemplary embodiments of the present invention are not limited thereto.

[0180] In block S110, when the request from the application is for skin measurement mode, the bioassay sensor control circuit BSC sends a mode signal to the bioassay sensor BS, causing the bioassay sensor BS to operate in skin measurement mode.

[0181] In block S130, when the mode signal from the bioassay sensor control circuit BSC indicates a skin measurement mode, the bioassay sensor BS controls the detection sensor UPX to output a second transmission signal TX_US. In an exemplary embodiment, the second transmission signal TX_US may be an ultrasound signal of a second frequency (about 10 kHz to about 50 kHz) suitable for skin condition sensing.

[0182] In box S132, the detection sensor UPX is detected from the sensing area SA (see...) Figure 1 The user input TC in the bioassay sensor receives the signal reflected by a specified part (e.g., the cortex) and provides the received signals RX1 to RXm as a second received signal RX_US to the bioassay sensor control circuit BSC.

[0183] In block S134, the bioassay sensor control circuit BSC can provide skin measurement information to the application based on the second received signal RX_US.

[0184] Based on the operating method of such a display device, the biometric detection sensor used for sensing biometric fingerprint input can measure not only the fingerprint but also skin elasticity. Therefore, user convenience can be improved.

[0185] Display devices equipped with the above configuration can use biometric sensors for sensing biometric fingerprint input to measure skin elasticity. This improves user convenience.

[0186] Although exemplary embodiments of the invention have been described, it should be understood that the invention is not limited to these exemplary embodiments, but can be modified and altered in various ways by those skilled in the art within the spirit and scope of the appended claims. Furthermore, the exemplary embodiments disclosed herein are not intended to limit the technical spirit of the inventive concept, and the scope of protection of the invention should be interpreted based on the appended claims. It should be understood that all technical spirit included within its equivalent scope is included within the scope of protection of the inventive concept.

Claims

1.A display apparatus comprising: a display panel configured to display an image; and a biometric sensor module disposed on the display panel, wherein the biometric sensor module is configured to: output a first transmission signal having a first frequency in a fingerprint sensing mode to sense fingerprint information; and output a second transmission signal having a second frequency lower than the first frequency in a skin measurement mode to sense skin condition information, wherein the biometric sensor module comprises: first detection sensors configured to transmit the first transmission signal having the first frequency in the fingerprint sensing mode; and second detection sensors configured to transmit the second transmission signal having the second frequency in the skin measurement mode, wherein each of the second detection sensors for generating the second transmission signal has a size greater than a size of each of the first detection sensors for generating the first transmission signal, and wherein one of the first detection sensors is disposed between four adjacent ones of the second detection sensors. 2.The display apparatus of claim 1, wherein: the display apparatus further comprises an input sensor disposed on a top surface of the display panel, the biometric sensor module is disposed on a bottom surface of the display panel, the first transmission signal penetrates the display panel and the input sensor, the second transmission signal penetrates the display panel and the input sensor. 3.The display apparatus of claim 1, wherein: the display panel comprises an image area in which an image is displayed and a bezel area; and the biometric sensor module is configured to transmit the first transmission signal and the second transmission signal to a sensing area corresponding to at least a portion of the image area. 4.The display apparatus of claim 1, wherein: the biometric sensor module comprises: a plurality of detection sensors configured to output the first transmission signal and the second transmission signal and to receive the fingerprint information and the skin condition information; a selection circuit configured to control operations of the plurality of detection sensors; and an output circuit configured to output a reception signal corresponding to the fingerprint information and the skin condition information sensed by the plurality of detection sensors. 5.The display apparatus of claim 4, wherein: the output circuit is configured to: output a first reception signal corresponding to the sensed fingerprint information in the fingerprint sensing mode; and output a second reception signal corresponding to the sensed skin condition information in the skin measurement mode. 6.The display apparatus of claim 1, wherein: the first detection sensors and the second detection sensors are alternately arranged. 7.The display apparatus of claim 1, wherein: a total number of the first detection sensors is greater than a total number of the second detection sensors. 8.The display apparatus of claim 1, wherein: ​ ​ The first frequency of the first transmission signal has a range of 10 MHz to 20 MHz, and the second frequency of the second transmission signal has a range of 10 kHz to 50 kHz. 9.A display device comprising: a display panel configured to display an image; and a biometric sensor module disposed on the display panel and configured to receive biometric information, wherein the biometric sensor module comprises: first detection sensors configured to transmit a first transmission signal having a first frequency to receive fingerprint information in a fingerprint sensing mode, wherein each of the first detection sensors is an ultrasonic sensor; and second detection sensors configured to transmit a second transmission signal having a second frequency lower than the first frequency to receive skin condition information in a skin measurement mode, wherein each of the second detection sensors is an ultrasonic sensor, wherein each of the second detection sensors for generating the second transmission signal has a size greater than a size of each of the first detection sensors for generating the first transmission signal, and wherein one of the first detection sensors is disposed between four adjacent ones of the second detection sensors. 10.The display device of claim 9, wherein, the display device further comprises an input sensor disposed on a top surface of the display panel, the first detection sensors and the second detection sensors are disposed on a bottom surface of the display panel, the first transmission signal penetrates the display panel and the input sensor, the second transmission signal penetrates the display panel and the input sensor. 11.The display device of claim 9, wherein, the first detection sensors and the second detection sensors are alternately arranged.

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