Patent Description:
An electronic device, such as a smartphone, a tablet personal computer (PC), or a smart watch may include various sensors. For example, the electronic device may collect bio-information of a user through a fingerprint sensor or a biometric sensor. The electronic device may provide various functions (e.g., screen unlocking, or running of a financial application) associated with security for a user by analyzing information collected through a sensor.

An electronic device may include a fingerprint sensor on a front surface or a rear surface thereof. Recently, attempts have been made to mount a fingerprint sensor on a portion of an active area of a display (hereinafter, an IN-DISPLAY). The fingerprint sensor in the IN-DISPLAY may include an optical fingerprint sensor or an ultrasonic fingerprint sensor.

<CIT>) is about a display device including a display panel configured to be situated under a transparent substrate and display an image on a display area toward the transparent substrate, a fingerprint sensor under the display panel to detect a fingerprint contacting the transparent substrate, and a drive integrated circuit (drive IC) configured to drive the display panel.

<CIT>) is about a fingerprint sensor cover that, according to an embodiment, comprises a glass plate having a display area and a fingerprint sensing area. The glass plate comprises: one side having a groove formed on the fingerprint sensing area; the other side opposite from the one side; and a reinforcement layer formed on the one side and the other side. The other side comprises a protrusion portion formed on an area, of the other side, corresponding to the fingerprint sensing area. On the one side, the compressive stress of the reinforcement layer on the fingerprint sensing area is less than the compressive stress of the reinforcement layer on the area excluding the fingerprint sensing area.

<CIT>, is about fingerprint sensor device including a sensor substrate, a plurality of sensor circuits over a first surface of the sensor substrate, and a transceiver layer located over the plurality of sensor circuits and the first surface of the sensor substrate. The transceiver layer includes a piezoelectric layer and a transceiver electrode positioned over the piezoelectric layer. The piezoelectric layer and the transceiver electrode are configured to generate one or more ultrasonic waves or to receive one or more ultrasonic waves. The fingerprint sensor device may include a cap coupled to the sensor substrate and a cavity formed between the cap and the sensor substrate. The cavity and the sensor substrate may form an acoustic barrier.

When the electronic device including the IN-DISPLAY fingerprint sensor operates as an ultrasonic type, the path of an ultrasonic wave may be changed by an air layer included inside the display panel. Accordingly, the efficiency of receiving an ultrasonic wave by the fingerprint sensor may be degraded and the performance of recognizing the fingerprint by the fingerprint sensor may be degraded.

In the electronic device, the air layer inside the display panel is removed, thereby preventing the path of an ultrasonic wave, which is generated by an ultrasonic sensor, from being reflected/refracted by the air layer. Accordingly, the performance of recognizing the fingerprint in the ultrasonic fingerprint sensor may be improved.

The electronic device may reduce the diffuse reflection (e.g., may reduce the scattering of light in the reflection) of the ultrasonic wave through a protrusion structure (e.g., a fillet structure) formed by expanding the bonding layer on the surface of the ultrasonic fingerprint sensor.

Hereinafter, various embodiments of the present disclosure will be described with reference to the accompanying drawings. Accordingly, those of ordinary skill in the art will recognize that modification, equivalent, and/or alternative on the various embodiments described herein can be variously made without departing from the scope of the present disclosure. With regard to description of drawings, similar components may be marked by similar reference numerals.

In the disclosure disclosed herein, the expressions "have", "may have", "include" and "comprise", or "may include" and "may comprise" used herein indicate existence of corresponding features (for example, elements such as numeric values, functions, operations, or components) but do not exclude presence of additional features.

In the disclosure disclosed herein, the expressions "A or B", "at least one of A or/and B", or "one or more of A or/and B", and the like used herein may include any and all combinations of one or more of the associated listed items. For example, the term "A or B", "at least one of A and B", or "at least one of A or B" may refer to all of the case (<NUM>) where at least one A is included, the case (<NUM>) where at least one B is included, or the case (<NUM>) where both of at least one A and at least one B are included.

The terms, such as "first", "second", and the like used herein may refer to various elements of various embodiments of the present disclosure, but do not limit the elements. For example, such terms are used only to distinguish an element from another element and do not limit the order and/or priority of the elements. For example, a first user device and a second user device may represent different user devices irrespective of sequence or importance. For example, without departing the scope of the present disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

It will be understood that when an element (for example, a first element) is referred to as being "(operatively or communicatively) coupled with/to" or "connected to" another element (for example, a second element), it can be directly coupled with/to or connected to the other element or an intervening element (for example, a third element) may be present. In contrast, when an element (for example, a first element) is referred to as being "directly coupled with/to" or "directly connected to" another element (for example, a second element), it should be understood that there are no intervening element (for example, a third element).

According to the situation, the expression "configured to" used herein may be used as, for example, the expression "suitable for", "having the capacity to", "designed to", "adapted to", "made to", or "capable of". The term "configured to (or set to)" must not mean only "specifically designed to" in hardware. Instead, the expression "a device configured to" may mean that the device is "capable of" operating together with another device or other components. CPU, for example, a "processor configured to (or set to) perform A, B, and C" may mean a dedicated processor (for example, an embedded processor) for performing a corresponding operation or a generic-purpose processor (for example, a central processing unit (CPU) or an application processor) which may perform corresponding operations by executing one or more software programs which are stored in a memory device.

Terms used in this specification are used to describe specified embodiments of the present disclosure and are not intended to limit the scope of the present disclosure. The terms of a singular form may include plural forms unless otherwise specified. Unless otherwise defined herein, all the terms used herein, which include technical or scientific terms, may have the same meaning that is generally understood by a person skilled in the art. It will be further understood that terms, which are defined in a dictionary and commonly used, should also be interpreted as is customary in the relevant related art and not in an idealized or overly formal detect unless expressly so defined herein in various embodiments of the present disclosure. In some cases, even if terms are terms which are defined in the specification, they may not be interpreted to exclude embodiments of the present disclosure.

An electronic device according to various embodiments of the present disclosure may include at least one of smartphones, tablet personal computers (PCs), mobile phones, video telephones, electronic book readers, desktop PCs, laptop PCs, netbook computers, workstations, servers, personal digital assistants (PDAs), portable multimedia players (PMPs), MP3 players, mobile medical devices, cameras, and wearable devices. According to various embodiments of the present disclosure, the wearable devices may include accessories (for example, watches, rings, bracelets, ankle bracelets, glasses, contact lenses, or head-mounted devices (HMDs)), cloth-integrated types (for example, electronic clothes), body-attached types (for example, skin pads or tattoos), or implantable types (for example, implantable circuits).

In some embodiments of the present disclosure, the electronic device may be one of home appliances. The home appliances may include, for example, at least one of a digital video disk (DVD) player, an audio, a refrigerator, an air conditioner, a cleaner, an oven, a microwave oven, a washing machine, an air cleaner, a set-top box, a home automation control panel, a security control panel, a TV box (for example, Samsung HomeSync™, Apple TV™, or Google TV™), a game console (for example, Xbox™ or PlayStation™), an electronic dictionary, an electronic key, a camcorder, or an electronic panel.

In another embodiment of the present disclosure, the electronic device may include at least one of various medical devices (for example, various portable medical measurement devices (a blood glucose meter, a heart rate measuring device, a blood pressure measuring device, and a body temperature measuring device), a magnetic resonance angiography (MRA), a magnetic resonance imaging (MRI) device, a computed tomography (CT) device, a photographing device, and an ultrasonic device), a navigation system, a global navigation satellite system (GNSS), an event data recorder (EDR), a flight data recorder (FDR), a vehicular infotainment device, electronic devices for vessels (for example, a navigation device for vessels and a gyro compass), avionics, a security device, a vehicular head unit, an industrial or home robot, an automatic teller's machine (ATM) of a financial company, a point of sales (POS) of a store, or an internet of things (for example, a bulb, various sensors, an electricity or gas meter, a spring cooler device, a fire alarm device, a thermostat, an electric pole, a toaster, a sporting apparatus, a hot water tank, a heater, and a boiler).

According to some embodiments of the present disclosure, the electronic device may include at least one of a furniture or a part of a building/structure, an electronic board, an electronic signature receiving device, a projector, or various measurement devices (for example, a water service, electricity, gas, or electric wave measuring device). In various embodiments of the present disclosure, the electronic device may be one or a combination of the aforementioned devices. The electronic device according to some embodiments of the present disclosure may be a flexible electronic device. Further, the electronic device according to an embodiment of the present disclosure is not limited to the aforementioned devices, but may include new electronic devices produced due to the development of technologies.

Hereinafter, electronic devices according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. The term "user" used herein may refer to a person who uses an electronic device or may refer to a device (for example, an artificial electronic device) that uses an electronic device.

<FIG> illustrates an electronic device capable of recognizing an external object using a partial region of a display, according to an embodiment. The following description will be made with reference to <FIG> while assuming that the external object is a fingerprint of a user, but the external object is not limited thereto.

Referring to <FIG>, an electronic device <NUM> includes a display (e.g., a display module) <NUM> and a main body <NUM> (e.g., a housing or frame).

The display <NUM> may include, for example, a liquid crystal display (LCD), a light-emitting diode (LED) display, an organic LED (OLED) display, a microelectromechanical systems (MEMS) display, or an electronic paper display. The display <NUM> may display, for example, various pieces of content (e.g., a text, an image, a video, an icon, and/or a symbol) for a user. The display <NUM> may include a touch screen and may receive, for example, a touch, a gesture, a proximity input, or a hovering input using an electronic pen or a part of the body of the user. The display <NUM> may include a glass cover (e.g., a window panel) exposed to the outside of the electronic device <NUM> and various internal layers.

The display <NUM> may be arranged to occupy an entire portion (BEZEL-LESS) or a part of a front surface (e.g., a surface to output content through the display <NUM>, or a surface to dispose an active area of the display <NUM>) of the electronic device <NUM>. The display <NUM> may be expanded to side surfaces (e.g., top/bottom/left/right surfaces) of the electronic device <NUM>.

The display <NUM> may include a fingerprint recognizing area <NUM> formed in at least a portion thereof (IN-DISPLAY). When the finger of the user is placed on the fingerprint recognizing area <NUM>, the fingerprint recognizing area <NUM> may collect fingerprint information by using a sound wave reflected from the fingerprint of the user's finger.

The fingerprint recognizing area <NUM> may be located at a position for easily disposing a thumb of a user, when the user holds the electronic device <NUM>, which is in a vertical mode (or portrait mode), using one hand.

The fingerprint recognizing area <NUM> may output content, such as a text or an image, identically to how content is output on other parts of the display <NUM>, when the fingerprint recognizing area <NUM> does not perform a fingerprint recognition function. When the process of recognizing the fingerprint is executed, the fingerprint recognizing area <NUM> may be displayed in a different color than another area of the display <NUM>, or may be displayed in the state of being illuminated (the state in which light is emitted from a pixel inside the display <NUM>).

The electronic device <NUM> may include a fingerprint sensor <NUM> to recognize an external object using an ultrasonic wave inside the fingerprint recognizing area <NUM>.

The fingerprint sensor <NUM> may generate an ultrasonic wave toward the fingerprint recognizing area <NUM>. The fingerprint sensor <NUM> may collect a sound wave reflected from the external object (e.g., the finger of the user) to transform the sound wave into a digital image. For example, the fingerprint sensor <NUM> may obtain a background image or an image including the fingerprint of the user, by capturing a plurality of image frames for a specific time. For example, the fingerprint sensor <NUM> may capture one image frame within about <NUM> milliseconds (msec) by using the ultrasonic wave.

A processor <NUM> may perform various operations. For example, the processor <NUM> may run software to control at least one other component (e.g., a hardware or software component) connected with the processor <NUM> and may process and compute various data.

The processor <NUM> may control the process of the fingerprint sensor <NUM> of recognizing the fingerprint by generating a signal for controlling the fingerprint sensor <NUM>. For example, the processor <NUM> may control the fingerprint sensor <NUM> to generate an ultrasonic wave for fingerprint recognition and to collect a wave reflected from the external object. The processor <NUM> may perform various functions (e.g., payment, banking, or screen unlocking), based on an image provided by the fingerprint sensor <NUM>.

The main body <NUM> may have the display <NUM> mounted thereon and allow an active area of the display <NUM> to be mainly disposed toward the first surface (front surface). The main body <NUM> may include various components (e.g., the processor <NUM>, a memory, a communication circuitry, a battery, or a substrate) to drive the electronic device <NUM>.

<FIG> is a cross-sectional view illustrating the fingerprint recognizing area of the electronic device, according to an embodiment. <FIG> may be a cross-sectional view taken along line I-I' of <FIG>.

Referring to <FIG>, the display <NUM> may include various layers. For example, the display <NUM> has a structure in which a transparent layer (e.g., a window panel or a glass plane) <NUM>, a bonding layer <NUM>, a polarizing layer <NUM>, a display panel <NUM>, a protective layer <NUM>, and a suppressing layer <NUM> are sequentially stacked. <FIG> is provided by way of example, but the disclosure is not limited thereto. In the display <NUM>, some layers may be added or may be omitted. For example, the display <NUM> may further include a touch panel.

The transparent layer (e.g., the window panel or the glass panel) <NUM> may be provided at the uppermost end (the surface of the electronic device <NUM>) of the display <NUM>. The transparent layer <NUM> may protect internal components of the display <NUM>. The light emitted from the display panel <NUM> may be output to the outside of the electronic device <NUM> through the transparent layer <NUM>.

The bonding layer <NUM> may bond the transparent layer <NUM> to the polarizing layer <NUM>. For example, the bonding layer <NUM> may include an optically clear adhesive (OCA) film or a double-sided adhesive tape.

The polarizing layer <NUM> may polarize light introduced from the outside and may transmit light oscillating along a linear locus thereof. The polarizing layer <NUM> may block light which is not matched with a specified linear locus.

The display panel <NUM> may be a layer to emit light in response to an electrical signal. The display panel <NUM> may include a substrate layer, a light emitting layer, and an encapsulating layer. For example, the display panel <NUM> may have a form obtained by depositing a light emitting device (e.g., an electroluminescence (EL) device) on a polyimide (PI) substrate. The PI substrate may include a metal wire or an insulating film to drive each pixel of an active area. The EL may generate light when holes and electrons are introduced into the EL from a cathode and an anode, respectively. The light emitting device may be covered by a structure formed by stacking an inorganic layer and an organic layer of at least three layers through a thin film encapsulating (TFE) layer (as illustrated in <FIG>).

An air layer or void may not be included in the layers of the display <NUM> disposed on the fingerprint sensor <NUM>. The air layer or the void may interrupt the ultrasonic wave, which is generated from the fingerprint sensor <NUM>, from travelling by reflecting or refracting the ultrasonic wave. For example, the acoustic impedance of the air is significantly different from that of the materials of the layers of the display <NUM> disposed on the fingerprint sensor <NUM>. Accordingly, most of the sound wave generated from the fingerprint sensor <NUM> may be reflected from the air layer.

The protective layer <NUM> may be a film layer to protect the rear surface of the display panel <NUM>. The protective layer <NUM> may prevent the display panel <NUM> from colliding with internal components of the electronic device. The protective layer <NUM> may include an embossed layer to reduce impact through a structural feature of the embossed form, and a cushion layer to reduce the impact through a material feature. The protective layer <NUM> may be a dark (e.g., black) opaque layer.

The suppressing layer <NUM> may suppress heat or an electromagnetic wave generated from the display panel <NUM>. For example, the suppressing layer <NUM> may include a copper (Cu) sheet.

The fingerprint sensor <NUM> (e.g., an image sensor) may be mounted on an inner surface (e.g., an inner surface corresponding to the fingerprint recognizing area <NUM> of <FIG>) of the display <NUM>. A surface (e.g., a sensing surface), which is used to collect the sound wave, of the fingerprint sensor <NUM> may be disposed toward the display panel <NUM>.

The fingerprint sensor <NUM> may be mounted on a part, which does not have layers, of the rear surface of the display <NUM>. For example, the fingerprint sensor <NUM> may be disposed in an area in which the protective layer <NUM> and the suppressing layer <NUM> are removed from a lower portion of the display panel <NUM>. The protective layer <NUM> and the suppressing layer <NUM> may have a hole (e.g., an opening) 119a formed in an area adjacent to the fingerprint sensor <NUM>. The fingerprint sensor <NUM> may be disposed inside the opening 119a.

Although <FIG> illustrates that part of the protective layer <NUM> and the suppressing layer <NUM> is removed and the fingerprint sensor <NUM> is mounted. However, the fingerprint sensor <NUM> may also be mounted in a state in which the protective layer <NUM> is removed and the suppressing layer <NUM> is maintained. In addition, the fingerprint sensor <NUM> may be included in a set of layers at a lower portion of the display panel <NUM> as the thickness of the set of layers is reduced.

The fingerprint sensor <NUM> may be bonded to a bottom surface (e.g., an opposite surface of an active area of the display <NUM> or the surface facing the back cover of the electronic device <NUM>) of the display panel <NUM> through a sensor bonding layer <NUM>.

The sensor bonding layer <NUM> may be formed by hardening a liquid-phase material having an adhesive property. For example, the sensor bonding layer <NUM> may include resin, an OCA, a film or a double-sided adhesive tape. A film or resin-type adhesive liquid may be applied to the bottom surface of the display panel <NUM>. When the fingerprint sensor <NUM> is seated and pressed on the applied adhesive liquid, the adhesive liquid may be spread and planarized. The planarized adhesive liquid is hardened to form the sensor bonding layer <NUM>. The sensor bonding layer <NUM> may be optically opaque (e.g., black).

The sensor bonding layer <NUM> may include a protrusion structures (hereinafter, fillet structure 145a and 145b) which is formed to cover at least a portion of the side surface (e.g., the surface facing the side of the electronic device <NUM>) of the fingerprint sensor <NUM>. The fillet structures 145a and 145b may be formed in the process of planarizing the adhesive liquid. The fillet structures 145a and 145b may reduce the ultrasonic signal which is diffuse reflected to the side surface of the fingerprint sensor <NUM>, thereby enhancing the fingerprint recognition performance.

The fillet structures 145a and 145b may be formed on all four surfaces of the fingerprint sensor <NUM> or three surfaces of the fingerprint sensor <NUM>.

The fingerprint sensor <NUM> is electrically connected with internal components (e.g., a printed circuit board (PCB)) of the electronic device <NUM> through a wiring part <NUM>. The wiring part <NUM> may be a portion of a flexible PCB (FPCB).

The first fillet structure 145a makes contact with the protective layer <NUM> and the suppressing layer <NUM> adjacent thereto, on one side surface of the fingerprint sensor <NUM>. The second fillet structure 145b does not make contact with the protective layer <NUM> and the suppressing layer <NUM> adjacent thereto, on another side surface of the fingerprint sensor <NUM>. The second fillet structure 145b is disposed adjacent to the wiring part <NUM>. The first fillet structure 145a and the second fillet structure 145b may have different heights. For example, the height of the first fillet structure 145a may be higher than the height of the second fillet structure 145b adjacent to the wiring part <NUM>.

The second fillet structure 145b may be formed at an area that is not adjacent to the wiring part <NUM>.

The fingerprint sensor <NUM> may include an ultrasonic wave oscillating unit and an ultrasonic wave receiving unit. The fingerprint sensor <NUM> may generate an ultrasonic wave having a specified frequency for fingerprint recognition through the ultrasonic wave oscillating unit. The fingerprint sensor <NUM> may collect a reflected sound wave (reflection wave) corresponding to an ultrasonic wave having a specified frequency, which is reflected from the external object, through the ultrasonic wave receiving unit. The fingerprint sensor <NUM> may convert the reflected wave into an electrical signal and may generate a digital image based on the electrical signal. The fingerprint sensor <NUM> may capture a plurality of image frames at a specified period of time and may obtain a sensing image based on the captured image frames.

The rear surface (the surface facing the back cover of the electronic device <NUM> or an opposite surface to a surface facing the fingerprint recognizing area <NUM>) of the fingerprint sensor <NUM> may be planarized. The fingerprint sensor <NUM> may have an air layer (or air gap) A1 formed on the rear surface thereof and spaced apart from a support member (e.g., a bracket or a metal sheet) by a specified distance (e.g., about <NUM> micrometers (um)) or more, without making contact with the support member (e.g., the bracket or the metal sheet). The ultrasonic wave emitted through the rear surface of the fingerprint sensor <NUM> is totally reflected from the air layer A1 toward the fingerprint recognizing area <NUM>.

<FIG> and <FIG> illustrate the structure of a display panel, according various embodiments.

Referring to <FIG>, the display panel <NUM> includes a substrate layer <NUM>, a light emitting device (or light emitting layer) <NUM>, and an encapsulating layer <NUM>.

The substrate layer (or flexible layer) <NUM> may be a conductive plate implemented using glass or a complex plastic (e.g., PI, or polyethylene teraphthalate (PET)). The substrate layer <NUM> may include a metal wiring and an insulating layer to drive each pixel of an active area. For example, the substrate layer <NUM> may be formed by hardening PI which is in a liquid phase. The PI substrate may have flexibility, so the PI substrate may be used for a flexible display.

The light emitting device <NUM> may emit light in response to an electrical signal. The light emitting device <NUM> may include each pixel constituting the display <NUM>. For example, the light emitting device <NUM> may be implemented with an EL. The EL may generate light when holes and electrons are introduced into the EL from a cathode and an anode, respectively.

The encapsulating layer <NUM> may surround the light emitting device <NUM> to block the light emitting device <NUM> from making contact with a peripheral material. For example, the encapsulating layer <NUM> may be implemented in a TFE form of surrounding the light emitting device <NUM> by sequentially stacking thin films. The TFE form may have a thin and flexible feature as compared to a form using glass.

The encapsulating layer <NUM> may be formed by stacking an inorganic layer and an organic layer to form at least three layers. For example, the encapsulating layer <NUM> may be formed on the light emitting device <NUM> by sequentially stacking a first inorganic insulating layer <NUM>, an organic insulating layer <NUM>, and a second inorganic insulating layer <NUM>. The first inorganic insulating layer <NUM> and the second inorganic insulating layer <NUM> may have excellent characteristics of preventing air or moisture from being infiltrated based on material characteristics thereof. The organic insulating layer <NUM> may surround particles on surfaces of the first inorganic insulating layer <NUM> and the second inorganic insulating layer <NUM> to planarize the first inorganic insulating layer <NUM> and the second inorganic insulating layer <NUM>. The organic insulating layer <NUM> may help the second inorganic insulating layer <NUM> be disposed in the process of forming the second inorganic insulating layer <NUM>.

Air layers may therefore not be included between the first inorganic insulating layer <NUM> and the organic insulating layer <NUM>, and between the organic insulating layer <NUM> and the second inorganic insulating layer <NUM>.

Referring to <FIG>, the substrate layer <NUM> may be implemented with a PET layer <NUM>. The substrate layer <NUM> includes a first PI 212a disposed on the PET layer <NUM>, a second inorganic insulating layer 212b disposed on the first PI 212a, and a second PI layer 212c disposed on the second inorganic insulating layer 212b. The second inorganic insulating layer 212b may include an SiNx layer. The SiNx layer, which serves as an inorganic barrier layer, may prevent air/moisture from being infiltrated. A third inorganic insulating layer <NUM> may be interposed between the light emitting device <NUM> and the second PI layer 212c. For example, the third inorganic insulating layer <NUM> may be a thin film transistor (TFT) insulating layer. Additionally or alternatively, the third inorganic insulating layer <NUM> may be a barrier or buffer.

Referring to <FIG>, the substrate layer include a substrate <NUM> and a barrier film <NUM>. According to an embodiment, the substrate layer <NUM> may further include an additional barrier layer mounted under the substrate <NUM>.

The TFT insulating layer <NUM> may include a first gate insulating film <NUM>, a second gate insulating film <NUM>, an inter-layer insulating film <NUM>, a protective film <NUM>, a pixel defining layer <NUM>, and a spacer <NUM>. The first gate insulating film <NUM> and the second gate insulating film <NUM> may electrically isolate a gate and source electrode <NUM> from a drain electrode <NUM>. The pixel defining layer <NUM> may isolate the light emitting device <NUM> from a peripheral component. The spacer <NUM> may form a space between the pixel defining layer <NUM> and the first inorganic insulating layer <NUM>.

The display panel <NUM> may be implemented in various forms by adding some components or omitting some components.

<FIG> is a cross-sectional view illustrating the fingerprint sensor and peripheral components, according to an embodiment.

Referring to <FIG>, the fingerprint sensor <NUM> may be bonded to the display panel through the sensor bonding layer <NUM>. The sensor bonding layer <NUM> may be formed by hardening a liquid-phase material having an adhesive property. The sensor bonding layer <NUM> may include resin, an OCA, a film or a double-sided tape. The sensor bonding layer <NUM> may be optically opaque (e.g., black).

The sensor bonding layer <NUM> includes the fillet structures 145a and 145b which are formed to surround at least a portion of at least one side surface of the fingerprint sensor <NUM>. The fillet structures 145a and 145b may be formed in the process when planarizing the adhesive liquid. The fillet structure 145a or 145b reduces the ultrasonic signal which is diffuse reflection to the side surface of the fingerprint sensor <NUM>, thereby enhancing the fingerprint recognition performance.

The first fillet structure 145a and the second fillet structure 145b may have different heights. For example, the height of the first fillet structure 145a may be higher than the height of the second fillet structure 145b adjacent to a wiring part <NUM>.

The fingerprint sensor <NUM> may include a TFT substrate layer <NUM>, an ultrasonic wave generating layer (or an ultrasonic wave oscillating unit) <NUM>, a metal layer <NUM>, or a planarizing layer <NUM>. The thickness T1 of the fingerprint sensor <NUM> may be within about <NUM>.

The TFT substrate layer <NUM> may be electrically connected with an internal component (e.g., a PCB) of the electronic device <NUM> through the wiring part <NUM>. The TFT substrate layer <NUM> may transmit a control signal necessary for the operation of the fingerprint sensor <NUM> and an image signal collected from the fingerprint sensor <NUM>. The wiring part <NUM> may be introduced in the side direction of the fingerprint sensor <NUM> and connected with the bottom surface (e.g., a surface facing the ultrasonic wave generating layer <NUM>) <NUM> of the TFT substrate layer <NUM>.

The ultrasonic wave generating layer <NUM> may generate an ultrasonic wave. The ultrasonic wave generated through the ultrasonic wave generating layer <NUM> may be output to a first surface (or a sensing surface) (e.g., a surface toward the display <NUM>), a second surface opposite to the first surface, or a side surface (e.g., a surface perpendicular to the first surface or the second surface).

The metal layer <NUM> may be utilized as a common electrode. For example, the metal layer <NUM> may include a metallic material, such as silver (Ag) or Cu, having lower resistance.

The planarizing layer <NUM> may planarize the rear surface (e.g., the second surface) of the fingerprint sensor <NUM>. The planarizing layer <NUM> may reduce the diffuse reflection of the ultrasonic wave by planarizing an air layer (or air gap) formed on the rear surface of the fingerprint sensor <NUM>, thereby enhancing a fingerprint recognition efficiency. For the flatness of the planarizing layer <NUM>, the height difference on the plane may have a value in the range of about <NUM> to about <NUM>.

The fillet structures 145a and 145b may have heights sufficient to cover at least a portion of a side surface of the ultrasonic wave generating layer <NUM>. In addition, the fillet structures 145a and 145b have heights sufficient to cover at least a portion of a side surface of the metal layer <NUM> or the planarizing layer <NUM>.

<FIG> is a cross-sectional view illustrating an electronic device including a conductive suppressing layer interposed between the fingerprint sensor and the display panel, according to an embodiment.

Referring to <FIG>, the display <NUM> includes a transparent layer (e.g., a window panel or a glass plane) <NUM>, the bonding layer <NUM>, the polarizing layer <NUM>, the display panel <NUM>, the protective layer <NUM>, and the suppressing layer <NUM>.

The functions and the operations of the transparent layer <NUM>, the bonding layer <NUM>, the polarizing layer <NUM>, the display panel <NUM>, the protective layer <NUM>, and the suppressing layer <NUM> may be the same functions and operations as respective components of <FIG>.

The electronic device <NUM> may further include a conductive suppressing layer <NUM> interposed between the display panel <NUM> and the fingerprint sensor <NUM>. The conductive suppressing layer <NUM> may suppress noise (e.g., electromagnetic interference (EMI) noise) caused by an electromagnetic wave, which may be generated from the display panel <NUM> to prevent the noise from being transmitted to the fingerprint sensor <NUM>. The conductive suppressing layer <NUM> may be electrically connected with an FPCB inside the electronic device <NUM> through a conductive tape (e.g., the conductive foam) <NUM> and the wiring part <NUM>.

The conductive suppressing layer <NUM> may have an adhesive property. The conductive suppressing layer <NUM> may be in an adhesive film type or may be a thermosetting adhesive resin or UV curable adhesive resin. The conductive suppressing layer <NUM> may be formed separately from the sensor bonding layer (e.g., a resin layer or a film type bonding layer) <NUM>.

At least a portion of the conductive suppressing layer <NUM> or the sensor bonding layer <NUM> may constitute the fillet structure 145a which is a form to cover at least a portion of a side surface of the fingerprint sensor <NUM>. The fillet structure 145a may reduce an ultrasonic signal which is diffuse reflected to the side surface of the fingerprint sensor <NUM>, thereby enhancing the fingerprint recognition performance.

The conductive suppressing layer <NUM> may be a black conductive layer, thereby preventing the fingerprint sensor <NUM> from being viewed from the outside.

<FIG> illustrates the mounting form of the fingerprint sensor when viewed from the rear surface of the electronic device, according to an embodiment.

Referring to <FIG>, when viewed from the rear surface (e.g., a surface opposite from a surface that includes an active area of the display <NUM> or a surface adjacent to the back cover) of the electronic device <NUM>, the fingerprint sensor <NUM> may be mounted in an opening <NUM> formed in FPCB <NUM> to drive the display <NUM>.

The FPCB <NUM> may process an image signal displayed by each pixel constituting the display panel <NUM>. The FPCB <NUM> may transmit a control signal of a processor or an image signal to a display driver integrated chip (DDI) of the display panel <NUM>. The FPCB <NUM> may be mounted in the electronic device <NUM>, making contact with the rear surface of the display panel <NUM>.

The FPCB <NUM> may include the opening <NUM> to mount the fingerprint sensor <NUM>. The size of the opening <NUM> may be greater than the sectional area of the fingerprint sensor <NUM>.

At least a partial side surface of the fingerprint sensor <NUM> may be maintained with a specified gap (e.g., an air gap) T2 from the side surface of the opening <NUM>. For example, the gap T2 may be equal to or greater than about <NUM> or more. The gap T2 may be filled with the fillet structure 145a by the sensor bonding layer <NUM>. The fillet structure 145a may be formed when planarizing the adhesive liquid. The fillet structure 145a may reduce an ultrasonic signal which is diffuse reflected to the side surface of the fingerprint sensor <NUM>, thereby enhancing the fingerprint recognition performance.

A connection part <NUM> and a wiring part <NUM> may be connected with one side surface of the fingerprint sensor <NUM>. The connection part <NUM> and the wiring part <NUM> may transmit a control signal for the operation of the fingerprint sensor <NUM> and an image signal collected from the fingerprint sensor <NUM>. An additional fillet structure may not be formed on one surface of the fingerprint sensor <NUM> connected with the connection part <NUM> and the wiring part <NUM>.

<FIG> illustrates a display panel and a fingerprint sensor using electronic ink, according to an embodiment.

Referring to <FIG>, an electronic ink panel <NUM> includes a first electrode <NUM>, a second electrode <NUM>, a separator <NUM>, a conductive toner <NUM>, and a water-soluble liquid <NUM>.

The first electrode <NUM> and the second electrode <NUM> may apply an electrical signal to the conductive toner <NUM>. The separator <NUM> may separate the conductive toner <NUM> and the water-soluble liquid <NUM> from another conductive toner and another water-soluble liquid in the unit of a pixel. The conductive toner <NUM> and the water-soluble liquid <NUM> may form a specified pattern in response to an electrical signal of the first electrode <NUM> and the second electrode <NUM>.

A fingerprint sensor <NUM> may be bonded to a bottom surface (e.g., a surface opposite to an active area of the display <NUM> or a surface facing the back cover of the electronic device <NUM>) of the display panel <NUM> through a sensor bonding layer <NUM>.

The sensor bonding layer <NUM> may be formed by hardening a liquid-phase material having an adhesive property. The sensor bonding layer <NUM> may include resin, an OCA, or a film. The sensor bonding layer <NUM> may include a fillet structure 745a which may sufficiently cover at least a portion of a side surface of the fingerprint sensor <NUM>. The fillet structure 745a may be formed while planarizing the adhesive liquid. The fillet structure 745a may reduce the ultrasonic signal which is diffuse reflected to the side surface of the fingerprint sensor <NUM>, thereby improving the fingerprint recognition performance.

<FIG> illustrates an electronic device including a plurality of different types of sensors, according to an embodiment.

Referring to <FIG>, an electronic device <NUM> includes a display (or display module) <NUM>, a main body (or housing or frame) <NUM>, a first sensor <NUM>, and a second sensor <NUM>. The first sensor <NUM> and the second sensor <NUM> may be mounted in areas formed by removing some layers constituting the display <NUM>. The first sensor <NUM> and the second sensor <NUM> may be mounted at different depths.

The display <NUM> may include a first sensing area <NUM> at a portion thereof (IN-DISPLAY). The first sensing area <NUM> may be an area for recognizing a surrounding object or a surrounding state of the electronic device <NUM>. The first sensing area <NUM> may include at least a portion of an active area of the display <NUM>. The electronic device <NUM> may include a first sensor (e.g., an image sensor, an iris recognition sensor, a camera module, a proximity illuminance sensor or a three dimensional (3D) recognition sensor) <NUM> provided inside the first sensing area <NUM> to recognize the surrounding object or the surrounding state of the electronic device <NUM> in various manners.

The display <NUM> may include a second sensing area <NUM> at another portion thereof. For example, the second sensing area <NUM> may be an area to recognize the fingerprint. When the finger of the user is disposed at the second sensing area <NUM>, the second sensing area <NUM> may be an area to collect fingerprint information using a sound wave reflected from the fingerprint of the finger. The second sensing area <NUM> may include at least a portion of the active area of the display <NUM>. The electronic device <NUM> may include the second sensor <NUM> provided inside the second sensing area <NUM> to recognize an external object using an ultrasonic wave.

The display <NUM> may include various layers. For example, the display <NUM> may include the structure in which a transparent layer (e.g., a window panel or a glass panel) <NUM>, a bonding layer <NUM>, a polarizing layer <NUM>, a touch panel (e.g., a touch sensor) <NUM>, a substrate layer 817a, a light emitting device 817b, an encapsulating layer 817c, and a protective layer <NUM> are stacked.

In the display <NUM>, some layers may be added or may be skipped. For example, the display <NUM> may further include a suppressing layer. Additionally, the position of the touch panel <NUM> may be changed with the position of the polarizing layer <NUM> or the touch panel <NUM> may be interposed between other layers, depending on the type of the touch panel <NUM>.

The functions and the operations of the transparent layer <NUM>, the bonding layer <NUM>, the polarizing layer <NUM>, the substrate layer 817a, the light emitting device 817b, the encapsulating layer 817c, and the protective layer <NUM> may be the same functions and operations as respective components of <FIG> or <FIG>.

In a cross-sectional view taken along line III-III', the first sensor <NUM> is mounted inside the first sensing area <NUM> of the display <NUM>. When the first sensor <NUM> is a camera module, a lens plane of a camera may be disposed to face the transparent layer <NUM>.

The first sensor <NUM> may be disposed in an area that is formed by removing some layers of the display <NUM>. For example, the first sensor <NUM> may be disposed to pass through a first opening formed in at least a portion of the substrate layer (e.g., the flexible layer) 817a and a second opening formed in at least a portion of the protective layer (e.g., the first opaque layer) <NUM>. The second opening may be aligned with the first opening in a direction passing through the display <NUM>, in a size equal to or greater than the size of the first opening. The first sensor <NUM> may be disposed in a first opening 819a formed by removing different layers of the display <NUM> instead of the transparent layer <NUM>.

In a cross-sectional view taken along line IV-IV', the second sensor <NUM> is mounted inside the second sensing area <NUM> of the display <NUM>. When the second sensor <NUM> is a fingerprint sensor using an ultrasonic wave, a surface (e.g., a sensing surface), which is used to collect a sound wave, of the second sensor <NUM> may be disposed toward (e.g., facing in a direction of) the display <NUM>.

The second sensor <NUM> may be mounted on a part (e.g., an area) formed by removing some layers from the rear surface of the display <NUM>. For example, the second sensor <NUM> may be disposed at an area formed by partially removing the protective layer <NUM>. The protective layer <NUM> may define a second opening (e.g., hole) 819b at an area adjacent to the second sensor <NUM>. The second sensor <NUM> may be seated inside the second opening 819b. The sectional area of the second opening 819b, in which the second sensor <NUM> is disposed, may be wider than the sectional area of the first opening 819a in which the first sensor <NUM> is disposed.

The second sensor <NUM> may be attached to the substrate layer 817a through a sensor bonding layer (or the second opaque layer) <NUM>. The sensor bonding layer <NUM> may include resin, an OCA, a film or a double-sided tape.

The protective layer <NUM> (e.g., the first opaque layer) may include a material that is different from at least one material included in the sensor bonding layer <NUM>. For example, the protective layer <NUM> may be implemented with black resin, and the sensor bonding layer <NUM> may be implemented with the OCA.

The sensor bonding layer (e.g., the second opaque layer) <NUM> may not include an air layer, or the air layer may be minimized inside the sensor bonding layer. An amount of air included in the sensor bonding layer <NUM> may be smaller than an amount of air included in the protective layer <NUM>.

The protective layer <NUM> may be different from the sensor bonding layer <NUM> in at least one of stiffness, flexibility, or density.

The protective layer <NUM> may be disposed spaced apart from the second bonding layer <NUM>. For example, the protective layer <NUM> and the sensor bonding layer <NUM> may be disposed spaced apart from each other by a value in the range of <NUM> to <NUM>.

The thickness of the sensor bonding layer <NUM> may be greater than the thickness of each of the organic insulating layer or inorganic insulating layer in the encapsulating layer 817c.

The sensor bond layer <NUM> may include fillet structures 885a and 885b which are formed to surround at least a portion of the side surfaces of the second sensor <NUM>. The fillet structures 885a and 885b may be formed in the process of planarizing the adhesive liquid. The fillet structure 885a or 885b reduces the ultrasonic signal which is diffuse reflected to the side surface of the second sensor <NUM>, thereby improving fingerprint recognition performance.

The first fillet structure 885a may make contact with a part of the protective layer <NUM> adjacent thereto on one side surface of the fingerprint sensor <NUM>. The second fillet structure 885b may not make contact with a part of the protective layer <NUM> adjacent thereto on another side surface of the second sensor <NUM>. The second fillet structure 885b may be disposed adjacent to a wiring part <NUM>. The first fillet structure 885a and the second fillet structure 885b may have different heights. For example, the height of the first fillet structure 885a may be higher than the height of the second fillet structure 885b adjacent to the wiring part <NUM>.

<FIG> is a block diagram of an electronic device <NUM> in a network environment <NUM>, according to various embodiments.

Referring to <FIG>, the electronic device <NUM> in the network environment <NUM> may communicate with an electronic device <NUM> over a first network <NUM> (e.g., a short range wireless communication network) or may communicate with an electronic device <NUM> or a server <NUM> over a second network <NUM> (e.g., a long distance wireless communication network). According to an embodiment, the electronic device <NUM> may communicate with the electronic device <NUM> through the server <NUM>. According to an embodiment, the electronic device <NUM> may include a processor <NUM>, a memory <NUM>, an input device <NUM>, a sound output device <NUM>, a display device <NUM>, an audio module <NUM>, a sensor module <NUM>, an interface <NUM>, a haptic module <NUM>, a camera module <NUM>, a power management module <NUM>, a battery <NUM>, a communication module <NUM>, a subscriber identification module <NUM>, or an antenna module <NUM>. In any embodiment, at least one (e.g., the display device <NUM> or the camera module <NUM>) of the components may be omitted from the electronic device <NUM>, or one or more other components may be further included in the electronic device <NUM>. In any embodiment, some of the components may be implemented with a single integrated circuit. For example, the sensor module <NUM> (e.g., a fingerprint sensor, an iris sensor, or an illumination sensor) may be embedded in the display device <NUM> (e.g., a display).

The processor <NUM> may execute, for example, software (e.g., a program <NUM>) to control at least one other component (e.g., a hardware or software component) of the electronic device <NUM> connected to the processor <NUM>, and may perform various data processing or operations. According to an embodiment, as at least a part of the data processing or operations, the processor <NUM> may load a command or data received from any other component (e.g., the sensor module <NUM> or the communication module <NUM>) to a volatile memory <NUM>, may process the command or data stored in the volatile memory <NUM>, and may store processed data in a nonvolatile memory <NUM>. According to an embodiment, the processor <NUM> may include a main processor <NUM> (e.g., a central processing unit or an application processor) and an auxiliary processor <NUM> (e.g., a graphic processing device, an image signal processor, a sensor hub processor, or a communication processor), which may be operated independently of or together with the main processor <NUM>. Additionally or alternatively, the auxiliary processor <NUM> may be configured to use lower power than the main processor <NUM> or to be specialized for a specified function. The auxiliary processor <NUM> may be implemented separately from the main processor <NUM> or may be implemented as a part of the main processor <NUM>.

The auxiliary processor <NUM> may control at least a part of a function or states associated with at least one component (e.g., the display device <NUM>, the sensor module <NUM>, or the communication module <NUM>) of the electronic device <NUM>, for example, instead of the main processor <NUM> while the main processor <NUM> is in an inactive (e.g., sleep) state and together with the main processor <NUM> while the main processor <NUM> is in an active (e.g., an application execution) state. According to an embodiment, the auxiliary processor <NUM> (e.g., an image signal processor or a communication processor) may be implemented as a part of any other component (e.g., the camera module <NUM> or the communication module <NUM>) which is functionally (or operatively) associated with the auxiliary processor <NUM>.

The memory <NUM> may store various data which are used by at least one component (e.g., the processor <NUM> or the sensor module <NUM>) of the electronic device <NUM>. The data may include, for example, software (e.g., the program <NUM>), or input data or output data associated with a command of the software. The memory <NUM> may include the volatile memory <NUM> or the nonvolatile memory <NUM>. The nonvolatile memory <NUM> may include an internal memory <NUM> or an external memory <NUM>.

The program <NUM> may be stored in the memory <NUM> as software, and may include, for example, an operating system <NUM>, a middleware <NUM>, or an application <NUM>.

The input device <NUM> may receive a commands or data which will be used by a component (e.g., the processor <NUM>) of the electronic device <NUM>, from the outside (e.g., a user) of the electronic device <NUM>.

The sound output device <NUM> may output a sound signal to the outside of the electronic device <NUM>. The speaker may be used for a general purpose such as multimedia play or recording play, and the receiver may be used to receive an incoming call. According to an embodiment, the receiver may be implemented separately from the speaker or may be implemented as a part of the speaker.

The display device <NUM> may visually provide information to the outside (e.g., the user) of the electronic device <NUM>. The display device <NUM> may include, for example, a display, a hologram device, or a control circuit for controlling a projector and a corresponding device. According to an embodiment, the display device <NUM> may include a touch circuitry configured to sense a touch, or a sensor circuitry (e.g., a pressure sensor) configured to measure the strength of force generated by the touch.

The audio module <NUM> may convert sound to an electrical signal, or reversely, may convert an electrical signal to sound. According to an embodiment, the audio module <NUM> may obtain sound through the input device <NUM>, or may output sound through the sound output device <NUM>, or through an external electronic device (e.g., the electronic device <NUM>) (e.g., a speaker or a headphone) directly or wirelessly connected with the electronic device <NUM>.

The sensor module <NUM> may sense an operation state (e.g., power or a temperature) of the electronic device <NUM> or an external environment state (e.g., a user state), and may generate an electrical signal or a data value corresponding the sensed state. According to an embodiment, the sensor module <NUM> may include, for example, a gesture sensor, a grip sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illumination sensor.

The interface <NUM> may support one or more specified protocols that may be used to directly and wirelessly connect the electronic device <NUM> with an external electronic device (e.g., the electronic device <NUM>).

A connection terminal <NUM> may include a connector that may allow the electronic device <NUM> to be physically connected with an external electronic device (e.g., the electronic device <NUM>). According to an embodiment, the connection terminal <NUM> may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector).

The haptic module <NUM> may convert an electrical signal to a mechanical stimulation (e.g., vibration or movement) or an electrical stimulation which the user may perceive through the sense of touch or the sense of movement. According to an embodiment, the haptic module <NUM> may include, for example, a motor, a piezoelectric sensor, or an electrical stimulation device.

The camera module <NUM> may photograph a still image and a video. According to an embodiment, the camera module <NUM> may include one or more lenses, image sensors, image signal processors, or flashes (or electrical flashes).

The power management module <NUM> may manage the power which is supplied to the electronic device <NUM>. According to an embodiment, the power management module <NUM> may be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

The battery <NUM> may power at least one component of the electronic device <NUM>. According to an embodiment, the battery <NUM> may include, for example, a primary cell not recharged, a secondary cell rechargeable, or a fuel cell.

The communication module <NUM> may establish a direct (or wired) communication channel or a wireless communication channel between the electronic device <NUM> and an external electronic device (e.g., the electronic device <NUM>, the electronic device <NUM>, or the server <NUM>) or may perform communication through the established communication channel. The communication module <NUM> may include one or more communication processors which is operated independently of the processor <NUM> (e.g., an application processor) and supports direct (or wired) communication or wireless communication. According to an embodiment, the communication module <NUM> may include a wireless communication module <NUM> (e.g., a cellular communication module, a short range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module <NUM> (e.g., a local area network (LAN) communication module or a power line communication module). A corresponding communication module of such communication modules may communicate with an external electronic device over the first network <NUM> (e.g., a short range communication network such as Bluetooth, Wi-Fi direct, or infrared data association (IrDA)) or the second network <NUM> (e.g., a long distance communication network such as a cellular network, an Internet, or a computer network (e.g., LAN or WAN)). The above-described kinds of communication modules may be integrated in one component (e.g., a single chip) or may be implemented with a plurality of components (e.g., a plurality of chips) which are independent of each other. The wireless communication module <NUM> may verify and authenticate the electronic device <NUM> within a communication network, such as the first network <NUM> or the second network <NUM>, by using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module <NUM>.

The antenna module <NUM> may transmit a signal or a power to the outside (e.g., an external electronic device) or may receive a signal or a power from the outside. According to an embodiment, the antenna module <NUM> may include one or more antennas, and at least one antenna which is suitable for a communication scheme used in a computer network such as the first network <NUM> or the second network <NUM> may be selected, for example, by the communication module <NUM> from the one or more antennas. The signal or power may be exchanged between the communication module <NUM> and an external electronic device through the selected at least one antenna or may be received from the external electronic device through the selected at least one antenna and the communication module <NUM>.

At least some of the components may be connected to each other through a communication scheme (e.g., a bus, a general purpose input and output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)) between peripheral devices and may exchange signals (e.g., commands or data) with each other.

According to an embodiment, a command or data may be transmitted or received (or exchanged) between the electronic device <NUM> and the external electronic device <NUM> through the server <NUM> connecting to the second network <NUM>. Each of the electronic devices <NUM> and <NUM> may be a device, the kind of which is the same as or different from a kind of the electronic device <NUM>. According to an embodiment, all or a part of operations to be executed in the electronic device <NUM> may be executed in one or more external devices of the external electronic devices <NUM>, <NUM>, or <NUM>. For example, in the case where the electronic device <NUM> should perform any function or service automatically or in response to a request from the user or any other device, the electronic device <NUM> may request one or more external electronic devices to perform at least a part of the function or service, instead of internally executing the function or service or additionally. The one or more external electronic devices which receive the request may execute at least a part of the function or service thus requested or an additional function or service associated with the request, and may provide a result of the execution to the electronic device <NUM>. The electronic device <NUM> may process received result as it is or additionally, and may provide a result of the processing as at least a part of the response to the request. To this end, for example, a cloud computing, distributed computing, or client-server computing technology may be used.

Claim 1:
An electronic device (<NUM>) comprising:
a display (<NUM>);
a sensor bonding layer (<NUM>); and
a fingerprint sensor (<NUM>) disposed under a specified area (<NUM>) of the display (<NUM>),
wherein the fingerprint sensor is bonded to an inner surface of the display (<NUM>), through the sensor bonding layer (<NUM>),
wherein at least a portion of the sensor bonding layer (<NUM>) is expanded to at least a portion of a side surface of the fingerprint sensor (<NUM>) and forms a first protrusion structure (145a) and a second protrusion structure (145b) to surround the at least a portion of the side surface of the fingerprint sensor (<NUM>),
wherein the first protruding structure (145a) is in contact with a protective layer (<NUM>) of the display (<NUM>) and the second protruding structure (145b) is not in contact with the protective layer (<NUM>) of the display (<NUM>),
wherein the fingerprint sensor (<NUM>) comprises an ultrasonic wave generating layer (<NUM>) configured to generate an ultrasonic wave,
wherein the first protrusion structure (145a) and the second protrusion structure (145b) are formed in a process of planarizing adhesive liquid of the sensor bonding layer (<NUM>),
wherein the fingerprint sensor (<NUM>) is electrically connected with circuitry provided inside the electronic device through a wiring part (<NUM>) introduced in the side surface of the fingerprint sensor (<NUM>), the wiring part (<NUM>) being disposed adjacent to the second protrusion structure (145b),
wherein the fingerprint sensor (<NUM>) further comprises a metal layer (<NUM>) and a planarizing layer (<NUM>), the planarizing layer (<NUM>) being configured to planarize an air layer formed on a rear surface of the fingerprint sensor (<NUM>),
wherein the first and second protrusion structures (145a, 145b) cover at least a portion of a side surface of the metal layer (<NUM>) or the planarizing layer (<NUM>).