Fingerprint sensors for mobile devices

Fingerprint sensor for mobile device

Fingerprint Sensors for Mobile Devices

The various embodiments generally relate to fingerprint sensors for user devices. More specifically, the various embodiments relate to techniques for positioning the fingerprint sensor under the display of the user device.

There are many types of electronic devices today, and these electronic devices utilize user interfaces for viewing on displays such as liquid crystal displays. The user typically interacts with the user interface using an input device that is actuated mechanically (for example, by buttons or keys) or electronically activated (for example, using a touch-sensitive screen). The user can view the content on the display, such as text and graphics, and use the input device to interact with the content. For example, the user can choose to issue commands, make choices, or move the cursor within the boundaries of the user interface. Touch-sensitive displays are becoming an increasingly popular choice for many electronic devices due to the improved marketability and ease of use of such displays.

Oftentimes, electronic devices use a series of privacy and security measures to protect information that is locally stored on the electronic device or that can be accessed by the electronic device. For example, an electronic device (eg, a mobile phone, a tablet computer, or a personal computer) can be configured to prompt the user to enter a passcode or scan a fingerprint before allowing the user to fully utilize the electronic device.

However, the fingerprint sensor is traditionally located in a specific location. For example, the fingerprint sensor on the iPhone® 6 and Samsung Galaxy S6® is located under the touch-sensitive buttons offset from the display. The fingerprint sensor is often located under the dedicated button. This is due to the overall design limitation of the display assembly and the structural limitation of other internal components (for example, the display panel and the touch circuit system).

This article describes various techniques for positioning the fingerprint sensor under the display assembly of the user device. By placing the fingerprint sensor under the display assembly, separate touch-sensitive buttons are no longer necessary and the total viewable area of the display assembly can be increased.

More specifically, the display assembly may include a protective substrate (for example, glass, plastic, etc. or a composite thereof) with which the user interacts, and a touch circuit system that generates signals in response to the user's interaction with the protective substrate , Display panel and backlight assembly including diffuser and backlight. The display panel may be, for example, a liquid crystal display (LCD) panel illuminated by light generated by a backlight. In some embodiments, an optically clear adhesive layer is disposed between the diffuser and the backlight, thereby substantially or completely eliminating the air gap that typically exists between these two components. The inclusion of the optically clear adhesive layer allows the waves emitted by the fingerprint sensor located under the backlight assembly to properly propagate through the display assembly.

Additionally or alternatively, a depression can be generated in the inward facing side of the protective substrate (that is, the side opposite to the outward facing side with which the user interacts), and the fingerprint sensor can be set in the depression. The fingerprint sensor is preferably substantially or completely transparent in such an embodiment. Because the wave emitted by the fingerprint sensor only propagates through the protective substrate, the air gap between the diffuser and the backlight can be tolerated without the need for an optically clear adhesive layer to replace it.

This article also describes a technique for increasing the density (or count) of touch sensing elements in a display assembly using in-cell technology. Touch sensing elements (for example, capacitors) are usually placed between display elements (for example, liquid crystals) in an integrated display panel that supports touch functionality. Typically, the density of touch sensing elements is only sufficient to recognize dull user interactions (for example, swipes and touches). However, by increasing the density of touch sensing elements in a unit, that unit may be able to accurately replicate the functionality of the fingerprint sensor.

This article describes a technique for positioning the fingerprint sensor under the display assembly of the user device, which enables the total viewable area of the display assembly to be increased. For example, distinct buttons offset from the display may no longer be necessary, and therefore, the total viewable area of the display assembly may extend to the edge of the user device housing. These technologies can be used with any electronic device with a user interface that the user can interact with, such as computers, tablets, personal digital assistants (PDAs), mobile phones, gaming devices, music Players, wearable electronic devices (for example, watches) and other portable electronic devices.<b>Terminology</b>

A brief definition of the terms, abbreviations and phrases used throughout this application is given below.

The reference to "one embodiment" or "an embodiment" in this specification means that a specific feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present disclosure. Occurrences of the phrase "in one embodiment" in various places in this specification do not necessarily all refer to the same embodiment, nor are they separate embodiments or alternative embodiments that are necessarily mutually exclusive with other embodiments. In addition, the description may show their various features through some embodiments instead of other embodiments. Similarly, the description may be various requirements for some embodiments but not the requirements of others.

Unless the context clearly requires otherwise, throughout the specification and the scope of the patent application, the terms "comprise/comprising" and the like are interpreted in the inclusive meaning, which is the opposite of the exclusive or detailed meaning; that is, the term "includes but not Interpretation of the meaning of "Limited". As used herein, the terms "connected", "coupled" or any variation thereof mean any direct or indirect connection or coupling between two or more elements; the coupling or connection between elements may be physical , Logic, or a combination thereof. For example, two components can be directly coupled to each other, or coupled via one or more intervening channels or components. As another example, devices can be coupled in such a way that information can be transferred between devices without sharing any physical connections with each other. In addition, when used in this application, the terms "this article", "above", "below" and words of similar meaning shall refer to this application as a whole and not to any specific part of this application . Where the context permits, the terms using the singular or plural number in the embodiments may also include the plural or singular number, respectively. The term "or" in a list that refers to two or more items covers all the following interpretations of the term: any item in the list, all items in the list, and any combination of items in the list.

If this specification states that a component or feature "may/can/could/might" includes or has a feature, then that particular component or feature is not required to include or have that feature.

The term "module" broadly refers to software, hardware, or firmware components. Modules are typically functional components that can use designated inputs to generate useful data or other output. The module may or may not be self-contained. An application program (also referred to as an "application") may include one or more modules, or a module may include one or more application programs.

The terminology used in the embodiments is intended to be interpreted in its broadest reasonable manner, even if it is used in conjunction with certain examples. The terms used in this specification generally have their ordinary meanings in the art, within the context of this disclosure, and in the specific context in which each term is used. For convenience, certain terms may be highlighted, for example, using uppercase, italics, and/or quotation marks. The use of highlighting has no effect on the category and meaning of the term; the category and meaning of the term are the same in the same context, regardless of whether it is highlighted or not. It will be understood that an element or feature can be described in more than one way.

Therefore, alternative language and synonyms can be used for any one or more of the terms discussed herein, and no matter whether the terms are described or discussed in detail herein, no special meaning is given to the terms. Provide synonyms for certain terms. The narration of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification (including examples of any terms discussed herein) is only illustrative, and is not intended to further limit the scope and meaning of this disclosure or any exemplified terms. Likewise, the present disclosure is not limited to the various embodiments given in this specification.<b>System Overview</b>

<b>NS</b><b>1A-B</b><b>picture</b>The user device 100 including the display 102 and the fingerprint sensor 104 is depicted. As noted above, the fingerprint sensor 104 is traditionally located under the touch-sensitive button 108 offset from the display 102. The fingerprint sensor can also (or alternatively) be integrated in the housing 106 of the user device 100. For example, the fingerprint sensor can be positioned along one of the lateral sides of the user device 100.

The touch-sensitive button 108 is typically designed so that the fingerprint sensor 104 is positioned under the protective substrate 110. The adhesive layer 112 may be disposed between the fingerprint sensor 104 and the protective substrate 110. Here, for example, the fingerprint sensor 104 is located under the protective substrate 110 of the touch-sensitive button that is in direct contact with the user's finger. Because only the protective substrate 110 (and possibly the adhesive layer 112) separates the fingerprint sensor 104 from the user's finger, the fingerprint sensor 104 is still extremely accurate. But this type of arrangement also prevents the fingerprint sensor 104 from being located in certain desirable positions (for example, under the display 102 itself).

<b>NS</b><b>2A</b><b>picture</b>A user device 200 according to various embodiments is depicted, the user device including a fingerprint sensor 204 located directly under the display 202. at the same time,<b>NS</b><b>2B</b><b>picture</b>It is a perspective view of the user device 200, which illustrates how this configuration enables the display 202 and the housing 206 extending to the user device 200. Positioning the fingerprint sensor 204 under the display 202 allows the total viewable area of the display 202 to be increased because space does not need to be allocated to distinct buttons (such as<b>NS</b><b>1A-B</b><b>picture</b>Shown).

In this embodiment, the position of the fingerprint sensor 204 can be identified by an icon, such as<b>NS</b><b>2A-B</b><b>picture</b>The circular icon may be identified by features in the protective outer substrate, such as indentations or pits. The display 202 can highlight the appropriate position when the user attempts to log in to the user device 200 (for example, by illuminating a part of the display 202, or by presenting a digital image in the shape of a target or fingerprint) to show that the user is about to place it. The position of the finger.

<b>NS</b><b>3</b><b>picture</b>It is a side view of a conventional display assembly 300 used in a user device. The display assembly 300 typically includes a protective substrate 302 with which the user interacts (e.g., by using a finger 316 to make contact with the outer surface). The protective substrate is preferably substantially or completely transparent and can be composed of glass, plastic, or any other suitable material (for example, crystalline alumina). The touch circuit system 304 that generates signals in response to user interaction with the protective substrate 302 is located under the protective substrate 302. The touch circuit system 304 may include, for example, a layer of driving lines that provide current and a layer of sensing lines, and the sensing lines determine the touch position by detecting the change in current caused by the user's finger 316. Each of the driving line and the sensing line may include a plurality of electrodes ("nodes"), which together generate a coordinate grid for the display assembly 300. The coordinate grid can be used by the processor on the printed circuit board assembly (PCBA) 314 to determine the user's intention to interact. Oftentimes, the touch circuit system 304 is mounted on a transparent substrate such as glass (or embedded in the transparent substrate).

A liquid crystal display (LCD) panel 306 (also referred to as a "liquid crystal layer") is located under the touch circuit system 304. Although the term "LCD panel" is used throughout the "embodiments" for illustrative purposes, other display technologies such as light emitting diodes (LEDs) and organic light emitting diodes (OLEDs) can also be used. ), electrophoresis/electronic ink ("e-ink"), etc. Since the LCD panel 306 does not naturally generate light, it is placed above the backlight assembly configured to illuminate the LCD panel 306. The backlight assembly includes a backlight 312 and in some embodiments includes a diffuser 308 that can distribute a substantially uniform amount of light generated by the backlight 312 to the liquid crystals of the LCD panel 306. When the backlight 312 is made of one or more point light sources, the diffuser 308 may be necessary, which does not naturally project light in a substantially uniform manner. Those familiar with this technology will realize that some or all of the components of the backlight assembly may not be necessary when using non-LCD display technology.

The air gap 310 often exists between the backlight 312 and the diffuser 308. Although maintaining the air gap 310 helps to cool the backlight assembly, it also causes additional reflection and refraction of the waves propagating through the display assembly 300. The additional reflection and refraction prevent the fingerprint sensor from being placed behind the backlight 312 and made as part of the conventional display assembly 300.

One or more components of the display assembly 300 may be coupled to a printed circuit board assembly (PCBA) 314. For example, the processor on the PCBA 314 may be configured to control the backlight 312, the LCD panel 306, and the touch circuit system 304. PCBA 314 may also include one or more processors that are configured to execute touch controller software, system software, and so on.

<b>NS</b><b>4</b><b>picture</b>This is a side view of the display assembly 400 in which the air gap between the diffuser 408 and the backlight 412 has been replaced by an optically clear adhesive (OCA) layer 410 as may appear in some embodiments. The OCA layer 410 (or some other laminate) reinforces the entire display assembly 400, thereby allowing waves (eg, sound waves, light waves) emitted by the fingerprint sensor 418 to propagate properly through the display assembly 400 toward the user's finger 416 , And then return to the fingerprint sensor 418 for processing.

More specifically, the OCA layer 410 bonds the diffuser 408 to the backlight 412 and substantially or completely eliminates the air gap between these components. The OCA layer 410 may include an acrylic-based or silicon-based adhesive and one or more indium-tin-oxide (ITO) layers. The OCA layer 410 is preferably substantially or completely transparent (for example, greater than 99% light transmission), and can be displayed to include glass, polyethylene (polyethylene; PET), polycarbonate (polycarbonate; PC), and polymethacrylic acid. Good adhesion to various substrates such as polymethyl methacrylate (PMMA).

Different types of fingerprint sensors 418 can be used based on the desired accuracy, the composition of other components in the display assembly 400, and so on. For example, the fingerprint sensor 418 may be a capacitive sensor including: an array of capacitor plates ("capacitors"), which are used to image fingerprints; and an optical sensor, the The optical sensor includes an array of photodiodes or photocrystal detectors. The photodiodes or photocrystal detectors convert the incident light into electric charges during detection; the thermal sensor, the thermal sensor The device uses focal thermoelectric materials, the thermal sensor measures the contact temperature of the fingerprint ridges and valleys; a radio frequency ("RF") sensor, the radio frequency sensor includes a detector array, the detection A sensor array reads the RF signal; an ultrasonic sensor, which includes an array of nodes that generate sound waves that propagate through the display assembly 400, etc.

<b>NS</b><b>5</b><b>picture</b>It is a side view of the display assembly 500. The display assembly includes a fingerprint sensor ("FPS") 518 disposed in the recess of the protective substrate 502. This arrangement allows the fingerprint sensor 518 to be placed in the display assembly 500, but eliminates the problems typically caused by the air gap 510, because the waves generated by the fingerprint sensor 518 only need to propagate through the protective substrate 502 .

The recess can be formed in the protective substrate 502 during the manufacturing process, and the fingerprint sensor 518 can then be disposed in the newly formed recess. In such an embodiment, the fingerprint sensor 518 can be attached in the recess using an optically clear adhesive. Alternatively, the fingerprint sensor 518 may be embedded in the protective substrate 502. The fingerprint sensor 518 is preferably substantially or completely transparent so that the user does not know that the fingerprint sensor 518 is present in the protective substrate 502. Because the transparent fingerprint sensor does not disturb the digital content displayed by the display assembly 500, multiple fingerprint sensors can be located under the protective substrate 502 (for example, along the bottom edge of the display or at the four corners of the display). In each of them).

The air gap 510 may be allowed to remain between the diffuser 508 and the backlight 512 because the wave from the fingerprint sensor 518 only needs to propagate through the protective substrate 502. That is, in this arrangement, the existence of the air gap 510 does not affect the accuracy of the fingerprint sensor 518. Therefore, the air gap 510 exists in some embodiments, and in other embodiments, the air gap 510 is replaced by an OCA layer (or some other laminate). Whether to replace the air gap 510 may depend on, for example, manufacturing cost, desired display quality, and so on.

<b>NS</b><b>6</b><b>picture</b>This is a side view of the display assembly 600, which uses in-cell technology to reduce the overall width of the display assembly 600. By combining separate layers for touch and display into a single display panel with touch functionality 604, the overall height of the display assembly 600 can be reduced. This reduces the amount of reflection and refraction experienced by the wave emitted by the fingerprint sensor located under the backlight 612 as the wave propagates through the display assembly 600. The accuracy of the fingerprint sensor can be further improved by using the OCA layer (as above<b>NS</b><b>4</b><b>picture</b>Said) replace the air gap 610 to improve.

An embodiment using in-cell technology includes an integrated display panel 604 that includes a display element (for example, liquid crystal) and a touch sensing element (for example, a capacitor) that enables touch functionality. The touch sensing element is usually placed between the display elements. For example, a capacitor may be placed between each pixel of an integrated LCD panel (that is, between each liquid crystal corresponding to red, green, or blue). The touch sensing element is configured to generate a signal in response to determining that the user's finger 616 has touched the protective substrate 602. However, in this arrangement, the density of capacitors is typically only sufficient to recognize dull user interactions, such as swipes and touches.

like<b>NS</b><b>7</b><b>picture</b>As shown, the display of the user device 700 can be broken down into segments called "units". In some embodiments, the density of touch sensing elements (eg, capacitors) is increased in certain units that can act as fingerprint sensors. Capacitive fingerprint technology can then be used to image the user's finger by locally increasing the density of touch sensing elements in certain cells.

E.g,<b>NS</b><b>7</b><b>picture</b>A sample composition of the display unit 702 and the touch unit 704 is depicted. The touch unit includes high-density touch sensing elements. The density (or total number) of touch sensing elements can be increased by increasing the total number of pixels in a specific cell or by replacing display elements (e.g., liquid crystals) with touch sensing elements (e.g., capacitors). In some embodiments, the touch sensing elements are arranged in a specific pattern (for example, every other pixel or clustered in certain areas), while in other embodiments, the touch sensing elements are randomly arranged among the display elements .

However, the increase in the touch sensitivity of the unit is typically accompanied by the loss of display performance (for example, color saturation, maximum resolution). Therefore, it may be desirable to allocate certain locally sensitive areas of the display for sensing fingerprints. E.g,<b>NS</b><b>2A</b><b>picture</b>The user device may include a recessed button with reduced resolution. The area allocated for fingerprint sensing can be selected because high display performance is not necessary (for example, around the outer edge of the display), because the user is unlikely to notice the reduction in display performance (for example, around the protective substrate The structural feature or in the case of the structural feature, the structural feature is such as a dimpled button.

<b>NS</b><b>8</b><b>picture</b>A process 800 for manufacturing a display assembly including a fingerprint sensor is depicted. The protective substrate for the user device is initially received by the manufacturer (step 801). The protective substrate can be glass, plastic, or some other suitable material (for example, crystalline alumina). The protective substrate includes two sides: an outward facing side, which the user can contact with the outward facing side; and an inward facing side, the inward facing side is directly adjacent to another layer of the display assembly (for example, touch electrical system).

The manufacturer can then create a recess in the inwardly facing side of the protective substrate (step 802), and construct a modified protective substrate by placing the fingerprint sensor in the recess (step 803). The fingerprint sensor can be attached in the recess using an optically clear adhesive.

The device assembly can then be assembled (e.g., by the manufacturer or another entity/individual), the device assembly including the modified protective substrate (step 804). The device assembly can include<b>NS</b><b>5</b><b>picture</b>Some or all of the components of the device assembly 500. After the assembly has been completed, the user device (and more specifically the device assembly) enables the user to use the fingerprint sensor when logging into the user device or interacting with the digital content presented by the user device (step 805 ).

<b>NS</b><b>9</b><b>picture</b>A process 900 for modifying a display assembly of a user device is depicted. The display assembly utilizes embedded technology to enable at least a portion of the display assembly to act as a fingerprint sensor. The display assembly using the embedded technology is initially obtained by the manufacturer (step 901). As mentioned above, the in-cell technology eliminates at least one layer in the display assembly. For example, an integrated display layer with touch functionality may be able to replicate the functionality of both the LCD panel and the touch circuit system.

The display assembly is divided into a plurality of units including a display element (for example, liquid crystal), a touch sensing element (for example, a capacitor), or a combination of the two. Each unit typically includes at least some touch-sensing elements, thereby allowing user interaction with dull recognition (eg, swipes, touches).

At least one of the cells is selected as a fingerprint sensor (step 902), and then the density of touch sensing elements in the selected cell is increased (step 903). Increase the density of touch sensing components to improve the touch sensitivity of the unit, and reduce the display performance of the unit. Therefore, a unit corresponding to a specific part of the display can be identified as a candidate for fingerprint sensing.

The display assembly can generate a signal in response to the finger being placed on at least a part of the selected cell due to the increased touch sensitivity (step 904). The signal generated by the touch sensing element can be transmitted to the touch circuit system, which analyzes the signal and determines whether the signal associated with the imaged finger is indicative and stored in the memory accessible to the user device Fingerprint matching (step 905). The fingerprint can be stored in a local memory (ie, the memory in the user's device) or a remote memory that can be accessed via the network.

Unless contrary to actual possibility, it is envisaged that the steps described above can be performed in various sequences and combinations. For example, the user device may include a fingerprint sensor disposed in a recess in a protective substrate and a fingerprint sensor produced by locally increasing the density of touch sensing elements in a specific unit of the display assembly.<b>Processing system</b>

Figure 10 is a block diagram illustrating an example of a processing system 1000 in which at least some of the operations described herein can be performed. The computing system may include one or more central processing units ("processors") 1002, main memory 1006, non-volatile memory 1010, network adapter 1012 (for example, network interface), video display 1018, input /Output device 1020, control device 1022 (for example, keyboard and pointing device), drive unit 1024 including storage medium 1026, and signal generating device 1030 communicatively connected to bus 1016. The bus 1016 is exemplified as an abstraction, which represents any one or more separate physical buses, point-to-point connections, or both connected by appropriate bridges, adapters, or controllers. The bus 1016 may therefore include, for example, a system bus, a Peripheral Component Interconnect (PCI) bus or a PCI-Express bus, an industry standard architecture (ISA) bus, and a small computer. System interface (small computer system interface; SCSI) bus, universal serial bus (USB), IIC (I2C) bus or Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers; IEEE) standard 1394 bus, also known as "FireWire".

In various embodiments, the processing system 1000 operates as part of a user device (for example, the user device 200 in Figure 2A-B), but the processing system 1000 can be connected (for example, wired or wirelessly) to the user Device. In network connection deployment, the processing system 1000 can operate in the capacity of a server or a client machine in a client-server network environment, or as a peer machine in an inter-level (or distributed) network environment operate.

The processing system 1000 can be a server computer, a client computer, a personal computer (PC), a tablet PC, a laptop computer, a personal digital assistant (PDA), a cellular phone, an iPhone®, an iPad® , BlackBerry®, processor, phone, web device, network router, switch or bridge, console, handheld console, game device, music player or capable of executing instruction sets (sequentially or otherwise) For any portable device or any machine, the instruction set specifies the actions to be taken by the processing system.

Although main memory 1006, non-volatile memory 1010, and storage medium 1026 (also referred to as "machine-readable medium") are shown as a single medium, the terms "machine-readable medium" and "storage medium" should be used to include One or more sets of single media or multiple media (such as centralized or distributed databases and/or associated caches and servers) are stored in one or more sets of instructions 1028. The terms "machine-readable medium" and "storage medium" should also be used to include any one or more of the methods that can store, encode, or transmit the instruction set executed by the computing system and cause the computing system to perform the currently disclosed embodiments. Any media of the author.

Generally speaking, the routines executed to implement the embodiments of the present disclosure can be implemented as part of the operating system or specific applications, components, programs, objects, modules, or a sequence of instructions called "computer programs". Computer programs typically include one or more commands (for example, commands 1004, 1008, 1028) set at various times in various memories and storage devices in the computer, and the one or more commands are used by one or more When a processing unit or processor 1002 reads and executes, it causes the processing system 1000 to operate to execute various elements related to the present disclosure.

In addition, although the embodiments have been described in the context of fully functioning computers and computer systems, those skilled in the art will understand that the various embodiments can be distributed as program products in various forms, regardless of the specific nature used to affect the distribution. Types of machine or computer-readable media are equally applicable to the present disclosure.

Other examples of machine-readable storage media, machine-readable media, or computer-readable (storage) media include, but are not limited to, recordable type media (such as volatile and non-volatile memory devices 1010, floppy disks, and other removable Disks, hard drives, optical disks (such as compact disk read-only memory (CD-ROM), digital versatile disk (DVD), etc.), and transmission media (such as digital And analog communication link).

The network adapter 1012 enables the processing system 1000 to use entities outside the processing system 1000 to mediate data in the network 1014 through any known and/or suitable communication protocols supported by the processing system 1000 and external entities. The network adapter 1012 may include one or more of the following: network adapter card, wireless network interface card, router, access point, wireless router, switch, multilayer switch, protocol converter, gateway, bridge , Bridge routers, hubs, digital media receivers and/or repeaters.

The network adapter 1012 may include a firewall. In some embodiments, the firewall may control and/or manage permission to access/agent data in the computer network, and track changes between different machines and/or applications Trust level. The firewall can be any number of modules with any combination of hardware and/or software components, which can be used in a specific set of machines and applications, machines and machines and/or applications. A set of predetermined access rights are implemented between applications, for example, to regulate the flow of traffic and resource sharing between these changing entities. The firewall can additionally manage and/or access an access control list, which includes, for example, object access and operation rights by individuals, machines, and/or applications, and the environment in which permission rights are established.

As pointed out above, the technology introduced in this article is implemented by, for example, a programmable circuit system (e.g., one or more microprocessors) programmed with software and/or firmware, all of which are dedicated hard-wired (i.e., Non-programmable) implemented in a circuit system or implemented in a combination of such formations. The dedicated circuit system may take the following forms, for example: one or more application-specific integrated circuits (ASIC), programmable logic device (PLD), field programmable gate array (field- programmable gate array; FPGA) and so on.<b>Remark</b>

The foregoing description of various embodiments has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the requested subject matter to the precise form disclosed. Many modifications and changes will be obvious to those familiar with this technology. The embodiments are selected and described to best describe the principle of the present invention and its practical application, thereby enabling other skilled in the relevant fields to understand the requested subject matter, various embodiments, and various modifications suitable for the specific use envisaged .

Although the above "implementation mode" describes certain embodiments and the best mode contemplated, no matter how detailed the above is presented in the text, the embodiments can be practiced in many ways. The details of the systems and methods may vary greatly in the implementation details of these systems and methods while still being covered by this specification. As pointed out above, the specific terms used in describing certain features or aspects of various embodiments should not be used to imply that the terms are redefined herein but are limited to any specific features, Features or appearances. Generally speaking, the terms used in the scope of the following patent applications should not be construed to limit the present invention to the specific embodiments disclosed in this specification, unless these terms are clearly defined herein. Accordingly, the actual scope of the present invention includes not only the disclosed embodiments, but also all equivalent ways of practicing or implementing the embodiments under the scope of the patent application.

The language used in this specification has been selected mainly for readability and teaching purposes, and may not have been selected to outline or limit the subject matter of the invention. Therefore, it is intended that the scope of the present invention is not limited by this "implementation mode", but is limited by any claims, and an application is issued based on these claims. Accordingly, the disclosures of the various embodiments are intended to illustrate rather than limit the scope of the embodiments, which are described in the scope of the following patent applications.

<p>100User device</p><p>102Display</p><p>104Fingerprint Sensor</p><p>106Shell</p><p>108Touch sensitive button</p><p>110Protective substrate</p><p>112Adhesive layer</p><p>200User device</p><p>202Display</p><p>204Fingerprint Sensor</p><p>206Shell</p><p>300Display Assembly</p><p>302Protective substrate</p><p>304Touch control circuit system</p><p>306Liquid Crystal Display Panel/LCD Panel</p><p>308Diffuser</p><p>310Air gap</p><p>312Backlight</p><p>314Printed Circuit Board Assembly/PCBA</p><p>316Finger</p><p>400Display Assembly</p><p>408Diffuser</p><p>410Optical Clear Adhesive Layer/OCA Layer</p><p>412Backlight</p><p>416Finger</p><p>418Fingerprint Sensor</p><p>500Display assembly/device assembly</p><p>502Protective substrate</p><p>508Diffuser</p><p>510Air gap</p><p>512Backlight</p><p>518Fingerprint Sensor</p><p>600Display Assembly</p><p>602Protective substrate</p><p>604Touch function/Integrated display panel</p><p>610Air gap</p><p>612Backlight</p><p>616Finger</p><p>700User device</p><p>702Display Unit</p><p>704Touch Unit</p><p>800Process</p><p>801Step</p><p>802step</p><p>803Step</p><p>804Step</p><p>805Step</p><p>900Process</p><p>901Step</p><p>902Step</p><p>903Step</p><p>904Step</p><p>905Step</p><p>1000Processing system</p><p>1002Central Processing Unit</p><p>1004Command</p><p>1006Main memory</p><p>1008Command</p><p>1010Non-volatile memory</p><p>1012Network Adapter</p><p>1014Internet</p><p>1016Bus</p><p>1018Video Display</p><p>1020Input/Output Device</p><p>1022Control device</p><p>1024Drive unit</p><p>1026Storage Media</p><p>1028Command</p><p>1030Signal generating device</p>

One or more embodiments of the present invention are illustrated in the accompanying drawings by way of example rather than limitation, in which the same element symbols indicate similar elements.

<b>NS</b><b>1A</b><b>picture</b>A user device is depicted. The user device includes a display and a fingerprint sensor located under a touch-sensitive button offset from the display.

<b>NS</b><b>1B</b><b>picture</b>The conventional arrangement of the fingerprint sensor under the protective substrate of the touch-sensitive button is depicted.

<b>NS</b><b>2A</b><b>picture</b>A user device is depicted that includes a fingerprint sensor directly under the display.

<b>NS</b><b>2B</b><b>picture</b>It is a perspective view of the user device, which illustrates how this configuration enables the display and extends to the casing of the user device.

<b>NS</b><b>3</b><b>picture</b>It is a side view of a conventional display assembly used in a user device.

<b>NS</b><b>4</b><b>picture</b>It is a side view of the display assembly. In the display assembly, the air gap between the diffuser and the backlight has been replaced by an optically clear adhesive layer.

<b>NS</b><b>5</b><b>picture</b>It is a side view of the display assembly. The display assembly includes a fingerprint sensor disposed in a recess created in the inwardly facing surface of the protective substrate.

<b>NS</b><b>6</b><b>picture</b>It is a side view of the display assembly, which uses embedded technology to reduce the overall width of the display assembly.

<b>NS</b><b>7</b><b>picture</b>Describe how the display assembly can be broken down into units that can accurately replicate the functionality of the fingerprint sensor.

<b>NS</b><b>8</b><b>picture</b>Describe the process used to manufacture a display assembly including a fingerprint sensor.

<b>NS</b><b>9</b><b>picture</b>Describes the process for modifying the display assembly of the user device. The display assembly uses embedded technology to enable at least one unit to act as a fingerprint sensor.

<b>NS</b><b>10</b><b>picture</b>It is a block diagram illustrating an example of a processing system in which at least some of the operations described herein can be carried out.

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