US20110102569A1 - Systems and Methods for Sensing Fingerprints Through a Display - Google Patents
Systems and Methods for Sensing Fingerprints Through a Display Download PDFInfo
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- US20110102569A1 US20110102569A1 US12/916,000 US91600010A US2011102569A1 US 20110102569 A1 US20110102569 A1 US 20110102569A1 US 91600010 A US91600010 A US 91600010A US 2011102569 A1 US2011102569 A1 US 2011102569A1
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- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1335—Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13312—Circuits comprising photodetectors for purposes other than feedback
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger
Definitions
- fingerprint sensing technology Since its inception, fingerprint sensing technology has revolutionized identification and authentication processes. In most cases, a single fingerprint can be used to uniquely identify an individual in a manner that cannot be easily replicated or imitated.
- the ability to capture and store fingerprint image data in a digital file of minimal size has yielded immense benefits in fields such as law enforcement, forensics, and information security.
- Such components are often impractical for use in systems that are designed to be of minimal size or weight.
- handheld devices begin to take on a greater range of functionality and more widespread use, engineers and designers of such devices are constantly seeking ways to maximize sophistication and ease of use while minimizing size and cost.
- input/output components that are deemed to be essential to core functionality, e.g., a display screen, a keyboard, and a limited set of buttons.
- fingerprint-based authentication techniques have not replaced username and password authentication in the most common information security applications such as email, online banking, and social networking.
- fingerprint-based authentication techniques have not replaced username and password authentication in the most common information security applications such as email, online banking, and social networking.
- the growing amount of sensitive information Internet users are entrusting to remote computer systems has intensified the need for authentication procedures that are more reliable than password-based techniques.
- LCD Liquid Crystal Display
- Touch-screen technology which typically comprises a special layer within the LCD panel apparatus, enables system output to be displayed and user input to be taken on the same surface.
- LCD technology has replaced cathode ray tube (CRT) displays in virtually all computer systems due to its lower power consumption and physical space requirements. Additionally, the declining cost and increasing sophistication of LCD touch-screen displays have contributed to the growing popularity of handheld computing devices incorporating such displays.
- the present invention provides such a system in an elegant manner.
- FIG. 1 illustrates an example LCD display device having touch screen circuitry and a bezel portion with a fingerprint sensor.
- FIG. 2 illustrates an example portion of an LCD display device having touch screen circuitry and a fingerprint sensor.
- FIG. 3 illustrates an exploded view of an example LCD display device.
- FIG. 4 illustrates a side view of an example LCD display device.
- FIG. 5 illustrates a side cut-away view of an example device including a touch screen and a fingerprint sensor.
- FIG. 6 illustrates a side cut-away view of another example device including a touch screen and a fingerprint sensor.
- FIG. 7 illustrates an example method of assembling an LCD display device.
- FIG. 8 illustrates another example method of assembling an LCD display device.
- FIG. 9 illustrates an example sensing device configured for use with the fingerprint sensing circuits discussed herein.
- FIG. 10 is a flow diagram illustrating an embodiment of a procedure for assembling an LCD display device.
- FIG. 11 is a flow diagram illustrating another embodiment of a procedure for assembling an LCD display device.
- the present invention is directed to a novel fingerprint sensor that can be integrated with an LCD display structure, such as being positioned on or adjacent the LCD glass. Additionally, one or more fingerprint sensing elements can optionally replace a touch-screen controller chip to provide a single chip solution that provides both touch-screen functions and fingerprint sensor functions.
- the invention is directed to a device, system and method for incorporating a fingerprint sensor with a display screen, such as an LCD screen.
- a display screen such as an LCD screen.
- the figures illustrate diagrammatic views of various examples of components configured according to the invention. These components, which include fingerprint sensor components and various subcomponents and structures for integration with an LCD screen or the like, are intended for incorporation into devices or systems. The invention would benefit these devices or systems by enabling them to provide fingerprint sensing capability.
- the embodiments discussed herein generally relate to an apparatus, system and methods for configuring fingerprint sensors and, in particular, for integrating fingerprint sensors into LCD circuits and displays.
- exemplary embodiments will be described.
- the exemplary embodiments of the invention are provided to illustrate the embodiments and should not be construed as limiting the scope of the embodiments.
- the apparatus and method include a method and apparatus for enabling the invention.
- this embodiment is described and illustrated in the context of devices, systems and related methods of capturing fingerprints, the scope of the invention extends to other applications where such functions are useful.
- the foregoing description has been with reference to particular embodiments of the invention, it will be appreciated that these are only illustrative of the invention and that changes may be made to those embodiments without departing from the principles, the spirit and scope of the invention, the scope of which is defined by the appended claims, their equivalents, and also later submitted claims and their equivalents.
- the integration of most fingerprint sensor designs with an LCD screen is problematic due to the difficulty of incorporating a silicon-based sensor into an LCD display structure.
- this problem is obviated with a novel design that allows the fingerprint sensor to be positioned on or adjacent the LCD screen, on a side opposite the touch screen circuitry.
- the invention works with current touch-screen and LCD manufacturing techniques, where fingerprint sensor conductive components may be positioned on as surface opposite the layers of the LCD components.
- the fingerprint sensor is functionally integrated with other LCD control circuits or components. This provides an LCD panel with the added functionality of a fingerprint sensor without disrupting the operation of the visual display components.
- current LCD manufacturing techniques can easily be adapted to produce an LCD panel designed and configured according to the invention.
- a fingerprint swipe sensor comprising a substrate having fingerprint sensor lines on one surface and configured to be integrated with (or disposed adjacent to) an LCD screen, and a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's finger is swiped about the fingerprint sensor lines.
- the substrate is mounted on a surface of an LCD screen opposite the touch screen circuitry.
- the substrate is positioned adjacent to a surface of the LCD screen opposite the touch screen circuitry.
- an LCD screen having an integrated fingerprint swipe sensor comprising an LCD surface configured to produce a visible display, a substrate having fingerprint sensor lines on one surface and configured to be integrated with (or disposed adjacent to) the LCD screen to allow the integrated fingerprint sensor lines to capture a fingerprint image, and a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the fingerprint sensor lines.
- the controller may be further configured to control the visible display.
- the LCD screen may further comprise an additional controller configured to control the visible display.
- the invention provides a mechanism to integrate the fingerprint sensor in an LCD opposite the components that are conventionally used in assembling touch-screen layers on LCD displays, or directly onto the LCD display itself.
- the examples and embodiments described herein include illustrations and references to touch sensitive circuitry, both capacitive and resistive, and also refer to fingerprint sensor circuitry that may also be capacitive or resistive, but the invention is not limited to any particular configuration or underlying technology in these areas. The invention is only limited by the appended claims, claims presented in the future, and any equivalents.
- the touch screen circuitry is connected with the LCD display on the LCD PCB (Printed Circuit Board) by one of two methods.
- the touch screen circuitry is first mounted on the LCD PCB, then the protective shield or coating is applied on top of the touch screen circuitry.
- the touch screen circuitry is applied onto the protective coating or shield, and then the resulting structure is mounted on the LCD PCB, with the touch screen circuitry mounted between the protective coating or shield and the LCD PCB.
- the substrate of the fingerprint sensor can be positioned on an opposite surface of the LCD with either of these methods.
- FIG. 1 a diagrammatic view of an example LCD panel 100 having a printed circuit board (PCB) 102 for holding LCD components to provide a display.
- LCD panel 100 also includes optional touch screen circuitry 104 surrounded by a bezel portion 106 .
- Bezel 106 is relatively narrow on three sides of touch screen circuitry 104 , and wider along a fourth side, which includes a fingerprint sensor 108 with a swiping area 110 for capturing a fingerprint from a user.
- fingerprint sensor 108 is located outside the touch screen portion of LCD panel 100 .
- fingerprint sensor 108 can be positioned on the opposite surface of LCD panel 100 from touch screen circuitry 104 .
- LCD panel 100 can be manufactured in a number of ways and, given this disclosure, one skilled in the art will find it feasible to design and produce such a device without undue experimentation. LCD panel 100 may be utilized in a variety of devices, such as a computing device, cellular phone, portable entertainment device, tablet device, and so forth.
- a side diagrammatic view of a device 200 is illustrated with a top coating 202 (also referred to as a “protective layer”) having touch sensor circuitry 204 located on an inside portion of top coating/layer 202 .
- a fingerprint sensor 206 layer described in greater detail below, is shown with a layer peeled back to illustrate the fingerprint sensor integrated with the LCD's PCB 208 .
- fingerprint sensor 206 may be positioned on a surface of PCB 208 that is opposite the surface on which touch sensor circuitry 204 is located.
- FIG. 3 illustrates an exploded view of an example assembly 300 , including an LCD PCB 302 and a fingerprint sensor 310 .
- a mask 304 is applied to a surface of LCD PCB 302 .
- Mask 304 is any material covering a portion of LCD PCB 302 that does not display images or other data.
- mask 304 may include a black layer that is opaque or semi-transparent.
- mask 304 may include an ink or other colored pigment coating applied to LCD PCB 302 , or applied to another layer, such as a protective layer or polyimide.
- a protective layer 306 which includes touch screen circuitry 308 on one side of the protective layer is applied to mask 304 .
- Touch screen circuitry 308 may be applied to the entire protective layer 306 , or applied to the portion of the protective layer that aligns with the viewable opening in mask 304 .
- touch screen circuitry 308 may be adhered to or otherwise placed on the bottom side of protective layer 306 prior to assembly, and then placed or otherwise mounted on top of LCD PCB 302 during final assembly.
- touch screen circuitry 308 may be assembled onto mask 304 , then the next layer (protective layer 306 ) is placed on top of the LCD PCB having touch screen circuitry 308 and mask 304 already mounted thereon.
- Fingerprint sensor 310 has a swiping area 312 .
- swiping area 312 is indicated on mask 304 by a swipe area marking 316 . Since the bezel portion of mask 304 may visually obscure fingerprint sensor 310 , swipe area marking 316 is provided on mask 304 to indicate the desired fingerprint swiping area to the user of assembly 300 .
- swipe area marking 316 uses a color or other characteristic that distinguishes the swipe area marking from the bezel color (or mask color). For example, if the bezel color is black, swipe area marking 316 is a lighter color, such as white or silver. In the example of FIG.
- fingerprint sensor 310 is located on the opposite side of LCD PCB 302 from mask 304 and protective layer 306 .
- Protective layer 306 can be a polyimide such as PET or PEN, or hard coat chemicals that can be applied to the surface of LCD PCB 302 .
- fingerprint sensor 310 is bonded to LCD PCB 302 using an optically clear adhesive (OCA) or other bonding mechanism.
- OCA optically clear adhesive
- fingerprint sensor 310 is positioned on the same side of LCD PCB 302 as mask 304 and protective layer 306 .
- FIG. 4 illustrates a side view of an example LCD display device 400 .
- the example of FIG. 4 shows an LCD PCB 402 with a mask layer 404 applied to one side of the LCD PCB.
- Touch screen circuitry 406 is then applied on mask layer 404 and a protective layer 408 is applied on the touch screen circuitry.
- a fingerprint sensor 410 is applied to a side of LCD PCB 402 that is opposite mask layer 404 . In this configuration, fingerprint sensor 410 senses a user's fingerprint as they swipe their finger about the fingerprint sensor.
- FIG. 5 illustrates a side cut-away view of an example device 500 including a touch screen and a fingerprint sensor.
- Device 500 includes a housing 502 , a printed circuit board 504 and an LCD module 506 .
- the device also includes a glass layer 508 onto which indium tin oxide (ITO) or similar materials are applied to form the touch screen circuitry.
- ITO indium tin oxide
- the ITO is shown on opposite sides of glass layer 508 by reference numerals 512 and 514 .
- Device 500 further includes a layer of protective glass 510 positioned above the ITO layer 512 .
- a touch circuit controller 516 is coupled to ITO layers 512 and 514 via a flexible circuit 518 .
- a fingerprint sensor 520 is coupled to printed circuit board 504 and positioned below the glass layer 508 .
- Fingerprint sensor 520 senses fingerprint characteristics of a finger swiped along the surface of protective glass 510 proximate the fingerprint sensor.
- layers 508 and 510 are non-conductive layers (e.g., glass).
- Fingerprint sensor 520 is capable of sensing ridges and valleys of a user's finger through layers 508 and 510 .
- the distance from fingerprint sensor 520 to the surface of protective glass 510 (where the user swipes their finger) is 150 microns or less.
- FIG. 6 illustrates a side cut-away view of another example device 600 including a touch screen and a fingerprint sensor.
- Device 600 includes a housing 602 , a printed circuit board 604 and an LCD module 606 .
- Device 600 also includes a glass layer 608 onto which ITO or similar materials are applied to form the touch screen circuitry.
- An ITO layer 612 is shown as applied to one side of glass layer 608 .
- Device 600 further includes a protective layer 610 positioned above glass layer 608 .
- a touch circuit controller 614 is coupled to ITO layer 612 via a flexible circuit 616 .
- a fingerprint sensor 618 is coupled to printed circuit board 604 and positioned below glass layer 608 . Fingerprint sensor 618 senses fingerprint characteristics of a finger swiped along the surface of protective layer 610 proximate the fingerprint sensor.
- FIG. 7 illustrates an example method of assembling an LCD display device 700 .
- the components shown in FIG. 7 are similar to those discussed above with respect to FIG. 3 , where touch screen circuitry 714 is shown separately from a protective layer 716 prior to assembly.
- a mask layer 704 is applied to a surface of LCD PCB 702 .
- a fingerprint sensor 718 having a swiping area 720 is applied to the opposite surface of LCD PCB 702 .
- fingerprint sensor 718 is positioned proximate the opposite surface of LCD PCB 702 on its own PCB or other structure.
- mask layer 704 includes an opening 708 that substantially aligns with a touch-sensitive portion of LCD display device 700 .
- a bezel portion 706 of mask layer 704 includes a swipe area marking 710 that indicates the desired fingerprint swiping area to the user of the device.
- a touch screen layer 712 includes touch screen circuitry 714 disposed thereon.
- Protective layer 716 is then applied to touch screen layer 712 to protect touch screen circuitry 714 and other components of LCD display device 700 .
- FIG. 8 illustrates another example method of assembling an LCD display device 800 .
- a touch screen layer 804 having touch screen circuitry 806 thereon is positioned above an LCD module 802 .
- a protective layer 808 is placed over touch screen layer 804 to protect touch screen circuitry 806 .
- a fingerprint sensor 810 is positioned proximate a surface of LCD module 802 opposite touch screen layer 804 .
- the device includes a linear array 912 such as described in the embodiments above, and also includes a sensor element 902 .
- the device further includes sensor control logic 952 configured to control the basic operations of the sensor element.
- the exact operations of the sensor element governed by the sensor logic control greatly depends on a particular sensor configuration employed, which may include power control, reset control of the pixels or data contact points, output signal control, cooling control in the case of some optical sensors, and other basic controls of a sensor element.
- Sensor controls are well known by those skilled in the art, and, again, depend on the particular operation.
- Sensing device 900 further includes a readout circuit 954 for reading analog output signals from sensor element 902 when it is subject to a fingerprint juxtaposed on a sensor surface 907 .
- Readout circuit 954 includes an amplifier 956 configured to amplify the analog signal so that it can more accurately be read in subsequent operations.
- a low pass filter 958 is configured to filter out any noise from the analog signal so that the analog signal can be more efficiently processed.
- Readout circuit 954 further includes an analog to digital converter 960 that is configured to convert the output signal from sensor element 902 to a digital signal that indicates a series of logic 0's and 1's that define the sensing of the fingerprint features by the pixels or data contact points of sensor surface 907 .
- Such signals may be separately received by the motion sensors and the fingerprint sensing surfaces, and may be read out and processed separately.
- Readout circuit 954 may store the output signal in a storage 962 , where fingerprint data 964 is stored and preserved, either temporarily until a processor 966 can process the signal, or for later use by the processor.
- Processor 966 includes an arithmetic unit 968 configured to process algorithms used for navigation of a cursor, and for reconstruction of fingerprints.
- Processing logic 970 is configured to process information and includes analog to digital converters, amplifiers, signal filters, logic gates (all not shown) and other logic utilized by a processor.
- a persistent memory 974 is used to store algorithms 976 and software applications 978 that are used by processor 966 for the various functions described above, and in more detail below.
- a system bus 980 is a data bus configured to enable communication among the various components contained in sensing device 900 .
- a fingerprint sensor in assembly, there are various ways such a device can be configured.
- a fingerprint sensor is provided that includes a flexible substrate having fingerprint sensor lines on one surface and configured to be integrated with an LCD screen. This allows for a device such as a laptop, cellular phone, touch-screen interface, or other personal device to have an integrated fingerprint sensor, saving space and simplifying the integrated design.
- the fingerprint sensor may be mounted on the LCD PCB separate from the touch screen circuitry.
- the touch screen circuitry may be mounted on the protective shield or coating.
- the resulting structure can then be mounted on the LCD PCB. This also provides an LCD screen with both touch screen circuitry and fingerprint sensor circuitry integrated therein.
- the substrate is obviated by the protective coating.
- the protective coating is configured to hold touch screen circuitry together with the fingerprint sensor lines mounted on the protective coating or shield.
- the protective coating can be mounted on an LCD screen together with the touch screen circuitry and the fingerprint sensor lines.
- the touch screen circuitry can be mounted directly on the LCD PCB, the fingerprint sensor lines mounted on the protective coating or shield, and the two resulting structures can be mounted together to produce an LCD display having both touch screen and fingerprint sensor functionality.
- the resulting system is an LCD screen having an integrated fingerprint swipe sensor and, possibly, a touch screen.
- the LCD screen may have one or the other or both, depending on the application.
- the system includes an LCD surface configured to produce a visible display.
- On top of the LCD surface can be mounted touch screen circuitry that may include fingerprint sensor lines.
- a separate substrate holding the fingerprint sensor lines may be mounted on or below the touch screen circuitry.
- the resulting structure may be configured to be integrated with the LCD screen to allow the integrated fingerprint sensor lines to capture a fingerprint image without interfering with the visibility of the display or with the function of the touch screen operation.
- the system further includes a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the fingerprint sensor lines.
- a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the fingerprint sensor lines.
- the system includes an LCD controller configured to control the visible display separate from the fingerprint sensor operations.
- the same controller may also control both the visible display and the fingerprint sensor operations.
- the fingerprint sensor could also be patterned onto the top glass of the LCD display itself, and not onto the touch-screen layer.
- FIG. 10 is a flow diagram illustrating an embodiment of a procedure 1000 for assembling an LCD display device.
- an LCD controller is mounted on a printed circuit board (block 1002 ) and a fingerprint sensor controller is mounted on the same printed circuit board (block 1004 ).
- An LCD module is mounted above the printed circuit board (block 1006 ).
- Fingerprint sensor circuitry is applied on one side of the LCD module (block 1008 ) and a mask layer is applied on an opposite side of the LCD module (block 1010 ).
- a motion sensor circuitry is then applied above the mask layer (block 1012 ) and a protective layer is applied above the motion sensor circuitry (block 1014 ).
- the LCD controller is connected to the motion sensor circuitry (block 1016 ) and the fingerprint sensor controller is connected to the fingerprint sensor circuitry (block 1018 ).
- FIG. 11 is a flow diagram illustrating another embodiment of a procedure 1100 for assembling an LCD display device.
- an LCD controller is mounted on a printed circuit board (block 1102 ) and a fingerprint sensor controller is mounted on the same printed circuit board (block 1104 ).
- Fingerprint sensor circuitry is then applied to the printed circuit board (block 1106 ).
- An LCD module is mounted above the printed circuit board (block 1108 ) and a mask layer is applied on a side of the LCD module opposite the printed circuit board (block 1110 ).
- Motion sensor circuitry is applied to a clear protective layer (block 1112 ) and the clear protective layer is mounted to the LCD module to position the motion sensor circuitry between the mask layer and the clear protective layer (block 1114 ).
- the LCD controller is then connected to the motion sensor circuitry (block 1116 ) and the fingerprint sensor controller is connected to the fingerprint sensor circuitry (block 1118 ).
- the present invention may also involve a number of functions to be performed by a computer processor, such as a microprocessor.
- the microprocessor may be a specialized or dedicated microprocessor that is configured to perform particular tasks according to the invention, by executing machine-readable software code that defines the particular tasks embodied by the invention.
- the microprocessor may also be configured to operate and communicate with other devices such as direct memory access modules, memory storage devices, Internet related hardware, and other devices that relate to the transmission of data in accordance with the invention.
- the software code may be configured using software formats such as Java, C++, XML (Extensible Mark-up Language) and other languages that may be used to define functions that relate to operations of devices required to carry out the functional operations related to the invention.
- the code may be written in different forms and styles, many of which are known to those skilled in the art. Different code formats, code configurations, styles and forms of software programs and other means of configuring code to define the operations of a microprocessor in accordance with the invention will not depart from the spirit and scope of the invention.
- Cache memory devices are often included in such computers for use by the central processing unit as a convenient storage location for information that is frequently stored and retrieved.
- a persistent memory is also frequently used with such computers for maintaining information that is frequently retrieved by the central processing unit, but that is not often altered within the persistent memory, unlike the cache memory.
- Main memory is also usually included for storing and retrieving larger amounts of information such as data and software applications configured to perform functions according to the invention when executed by the central processing unit.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- flash memory and other memory storage devices that may be accessed by a central processing unit to store and retrieve information.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- flash memory and other memory storage devices that may be accessed by a central processing unit to store and retrieve information.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- flash memory and other memory storage devices that may be accessed by a central processing unit to store and retrieve information.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- flash memory and other memory storage devices that may be accessed by a central processing unit to store and retrieve information.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- machine-readable medium should be taken to include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) that store the one or more sets of instructions.
- the term “machine-readable medium” shall also be taken to include any medium that is capable of storing, encoding or carrying a set of instructions for execution by the machine and that causes the machine to perform any one or more of the methodologies of the invention.
- the machine-readable medium includes any mechanism that provides (i.e., stores and/or transmits) information in a form readable by a machine (e.g., a computer, PDA, cellular telephone, etc.).
- a machine-readable medium includes memory (such as described above); magnetic disk storage media; optical storage media; flash memory devices; biological electrical, mechanical systems; electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.).
- the device or machine-readable medium may include a micro-electromechanical system (MEMS), nanotechnology devices, organic, holographic, solid-state memory device and/or a rotating magnetic or optical disk.
- MEMS micro-electromechanical system
- the device or machine-readable medium may be distributed when partitions of instructions have been separated into different machines, such as across an interconnection of computers or as different virtual machines.
- Embodiments of the systems and methods described herein facilitate integrated fingerprint sensing and display of information. Some embodiments are used in conjunction with one or more conventional fingerprint sensing systems and methods. For example, one embodiment is used as an improvement of existing fingerprint detection and/or sensing systems. Other embodiments are used in conjunction with one or more conventional display systems and methods. For example, one embodiment is used as an improvement of existing display devices.
- components and modules illustrated herein are shown and described in a particular arrangement, the arrangement of components and modules may be altered to sense fingerprint information or to display information in a different manner.
- one or more additional components or modules may be added to the described systems, and one or more components or modules may be removed from the described systems.
- Alternate embodiments may combine two or more of the described components or modules into a single component or module.
Abstract
Description
- The present application is a Continuation of co-pending U.S. patent application Ser. No. 12/914,812 filed on Oct. 28, 2010, the disclosure of which is incorporated by reference herein. That application also claims the benefit of U.S. Provisional Application No. 61/256,908, filed Oct. 30, 2009, the disclosure of which is incorporated by reference herein.
- Since its inception, fingerprint sensing technology has revolutionized identification and authentication processes. In most cases, a single fingerprint can be used to uniquely identify an individual in a manner that cannot be easily replicated or imitated. The ability to capture and store fingerprint image data in a digital file of minimal size has yielded immense benefits in fields such as law enforcement, forensics, and information security.
- However, the widespread adoption of fingerprint sensing technology in a broad range of applications has faced a number of obstacles. Among these obstacles is the need for a separate and distinct apparatus for capturing a fingerprint image, which most consumer-grade computer systems do not contain. Incorporating a distinct component whose only function is to capture fingerprint image data into an otherwise multi-functional computer system is often not economical for consumers or computer manufacturers. Although low-cost fingerprint sensing devices do exist, consumers are often reluctant to purchase a separate accessory with such a limited application. Consequently, computer manufacturers typically do not incorporate such accessories as built-in components.
- Additionally, such components are often impractical for use in systems that are designed to be of minimal size or weight. As handheld devices begin to take on a greater range of functionality and more widespread use, engineers and designers of such devices are constantly seeking ways to maximize sophistication and ease of use while minimizing size and cost. Typically, such devices only incorporate input/output components that are deemed to be essential to core functionality, e.g., a display screen, a keyboard, and a limited set of buttons.
- For these reasons, fingerprint-based authentication techniques have not replaced username and password authentication in the most common information security applications such as email, online banking, and social networking. Paradoxically, the growing amount of sensitive information Internet users are entrusting to remote computer systems has intensified the need for authentication procedures that are more reliable than password-based techniques.
- The advent and widespread adoption of LCD (Liquid Crystal Display) technology provides an opportunity to address this need. LCD technology provides a low-cost and versatile means of incorporating both input and output functionality into a single discrete component. Touch-screen technology, which typically comprises a special layer within the LCD panel apparatus, enables system output to be displayed and user input to be taken on the same surface. LCD technology has replaced cathode ray tube (CRT) displays in virtually all computer systems due to its lower power consumption and physical space requirements. Additionally, the declining cost and increasing sophistication of LCD touch-screen displays have contributed to the growing popularity of handheld computing devices incorporating such displays.
- An LCD display with built-in fingerprint sensing capability would thus lead to more widespread adoption of fingerprint-based authentication. However, one problem with simply integrating existing fingerprint sensing technology into LCD touch screens is hardware incompatibility. Most fingerprint sensors require a silicon circuit on which to mount the fingerprint sensing components, whether they are resistive, capacitive, thermal, or optical. Incorporating such a circuit into an LCD display would require significant and costly modifications to the design and production processes of such displays. However, a fingerprint sensing system comprising a mechanism and components that can easily be incorporated into existing LCD display structures addresses this problem.
- As will be seen, the present invention provides such a system in an elegant manner.
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FIG. 1 illustrates an example LCD display device having touch screen circuitry and a bezel portion with a fingerprint sensor. -
FIG. 2 illustrates an example portion of an LCD display device having touch screen circuitry and a fingerprint sensor. -
FIG. 3 illustrates an exploded view of an example LCD display device. -
FIG. 4 illustrates a side view of an example LCD display device. -
FIG. 5 illustrates a side cut-away view of an example device including a touch screen and a fingerprint sensor. -
FIG. 6 illustrates a side cut-away view of another example device including a touch screen and a fingerprint sensor. -
FIG. 7 illustrates an example method of assembling an LCD display device. -
FIG. 8 illustrates another example method of assembling an LCD display device. -
FIG. 9 illustrates an example sensing device configured for use with the fingerprint sensing circuits discussed herein. -
FIG. 10 is a flow diagram illustrating an embodiment of a procedure for assembling an LCD display device. -
FIG. 11 is a flow diagram illustrating another embodiment of a procedure for assembling an LCD display device. - Throughout the description, similar reference numbers may be used to identify similar elements.
- The present invention is directed to a novel fingerprint sensor that can be integrated with an LCD display structure, such as being positioned on or adjacent the LCD glass. Additionally, one or more fingerprint sensing elements can optionally replace a touch-screen controller chip to provide a single chip solution that provides both touch-screen functions and fingerprint sensor functions.
- In particular, the invention is directed to a device, system and method for incorporating a fingerprint sensor with a display screen, such as an LCD screen. The figures illustrate diagrammatic views of various examples of components configured according to the invention. These components, which include fingerprint sensor components and various subcomponents and structures for integration with an LCD screen or the like, are intended for incorporation into devices or systems. The invention would benefit these devices or systems by enabling them to provide fingerprint sensing capability.
- Reference will be made herein to a fingerprint sensor and related circuitry that may be implemented on Kapton™ tape, a well known substrate for placing or printing electrical components thereon. Reference is made here of U.S. patent application Ser. No. 11/184,464, filed Jul. 19, 2005, entitled “Electronic Fingerprint Sensor with Differential Noise Cancellation,” and U.S. patent application Ser. No. 10/005,643, filed Dec. 5, 2001, entitled “Swiped Aperture Capacitive Fingerprint Sensing Systems and Methods.” This application also incorporates the following by reference: U.S. patent application Ser. No. 10/689,107, filed Oct. 20, 2003, entitled “Swiped Aperture Capacitive Fingerprint Sensing Systems and Methods,” and U.S. patent application Ser. No. 11/107,682, filed Apr. 15, 2005, entitled “Fingerprint Position Sensing Methods and Apparatus.” This application also incorporates the following by reference: U.S. patent application Ser. No. 09/080,322, filed May 15, 1998, entitled “Combined Fingerprint Acquisition and Control Device”, and U.S. patent application Ser. No. 09/489,908, filed Jan. 24, 2000, entitled “Combined Fingerprint Acquisition and Control Device.” These references are commonly assigned with this application, where such a sensor configuration and design are detailed. All details of these applications and issued patents are herein incorporated by reference.
- The embodiments discussed herein generally relate to an apparatus, system and methods for configuring fingerprint sensors and, in particular, for integrating fingerprint sensors into LCD circuits and displays. Referring to the figures, exemplary embodiments will be described. The exemplary embodiments of the invention are provided to illustrate the embodiments and should not be construed as limiting the scope of the embodiments.
- In the following disclosure, numerous specific details are set forth to provide a thorough understanding of the invention. However, those skilled in the art will appreciate that the invention may be practiced without such specific details. In other instances, well-known elements have been illustrated in schematic or block diagram form in order not to obscure the invention in unnecessary detail. Additionally, for the most part, details concerning network communications, data structures, and the like have been omitted inasmuch as such details are not considered necessary to obtain a complete understanding of the invention, and are considered to be within the understanding of persons of ordinary skill in the relevant art.
- It is further noted that all functions described herein may be performed in either hardware or software, or a combination thereof, unless indicated otherwise. Certain terms are used throughout the following description and claims to refer to particular system components. As one skilled in the art will appreciate, components may be referred to by different names. This document does not intend to distinguish between components that differ in name, but not function. In the following discussion and in the claims, the terms “including”, “comprising”, and “incorporating” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to . . . ”. Also, the term “couple” or “couples” is intended to mean either an indirect or direct electrical or communicative connection. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections.
- While certain exemplary embodiments have been described and shown in the accompanying drawings, it is to be understood that such embodiments are merely illustrative of and not restrictive on the broad invention, and that this invention not be limited to the specific constructions and arrangements shown and described, since various other modifications may occur to those ordinarily skilled in the art. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.
- Reference in the specification to “an embodiment,” “one embodiment,” “some embodiments,” or “other embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiments is included in at least some embodiments, but not necessarily all embodiments. The various appearances of “an embodiment,” “one embodiment,” or “some embodiments” are not necessarily all referring to the same embodiments. If the specification states a component, feature, structure, or characteristic “may”, “might”, or “could” be included, that particular component, feature, structure, or characteristic is not required to be included. If the specification or claim refers to “a” or “an” element, that does not mean there is only one of the element. If the specification or claims refer to “an additional” element, that does not preclude there being more than one of the additional element.
- The apparatus and method include a method and apparatus for enabling the invention. Although this embodiment is described and illustrated in the context of devices, systems and related methods of capturing fingerprints, the scope of the invention extends to other applications where such functions are useful. Furthermore, while the foregoing description has been with reference to particular embodiments of the invention, it will be appreciated that these are only illustrative of the invention and that changes may be made to those embodiments without departing from the principles, the spirit and scope of the invention, the scope of which is defined by the appended claims, their equivalents, and also later submitted claims and their equivalents.
- As described in the background, the integration of most fingerprint sensor designs with an LCD screen is problematic due to the difficulty of incorporating a silicon-based sensor into an LCD display structure. According to the invention, this problem is obviated with a novel design that allows the fingerprint sensor to be positioned on or adjacent the LCD screen, on a side opposite the touch screen circuitry. The invention works with current touch-screen and LCD manufacturing techniques, where fingerprint sensor conductive components may be positioned on as surface opposite the layers of the LCD components. The fingerprint sensor is functionally integrated with other LCD control circuits or components. This provides an LCD panel with the added functionality of a fingerprint sensor without disrupting the operation of the visual display components. In addition, current LCD manufacturing techniques can easily be adapted to produce an LCD panel designed and configured according to the invention.
- Consistent with the foregoing, disclosed herein is a fingerprint swipe sensor, comprising a substrate having fingerprint sensor lines on one surface and configured to be integrated with (or disposed adjacent to) an LCD screen, and a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's finger is swiped about the fingerprint sensor lines. In one embodiment, the substrate is mounted on a surface of an LCD screen opposite the touch screen circuitry. In another embodiment, the substrate is positioned adjacent to a surface of the LCD screen opposite the touch screen circuitry.
- Also disclosed is an LCD screen having an integrated fingerprint swipe sensor, comprising an LCD surface configured to produce a visible display, a substrate having fingerprint sensor lines on one surface and configured to be integrated with (or disposed adjacent to) the LCD screen to allow the integrated fingerprint sensor lines to capture a fingerprint image, and a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the fingerprint sensor lines. In one embodiment, the controller may be further configured to control the visible display. In another embodiment, the LCD screen may further comprise an additional controller configured to control the visible display.
- As will be seen, the invention provides a mechanism to integrate the fingerprint sensor in an LCD opposite the components that are conventionally used in assembling touch-screen layers on LCD displays, or directly onto the LCD display itself. The examples and embodiments described herein include illustrations and references to touch sensitive circuitry, both capacitive and resistive, and also refer to fingerprint sensor circuitry that may also be capacitive or resistive, but the invention is not limited to any particular configuration or underlying technology in these areas. The invention is only limited by the appended claims, claims presented in the future, and any equivalents.
- In current touch screen designs, there typically exists an LCD printed circuit board (PCB) on which the touch screen circuitry is mounted, and a protective shield or coating is applied on top of the touch screen circuitry. The touch screen circuitry is connected with the LCD display on the LCD PCB (Printed Circuit Board) by one of two methods. In one method, the touch screen circuitry is first mounted on the LCD PCB, then the protective shield or coating is applied on top of the touch screen circuitry. In another method, the touch screen circuitry is applied onto the protective coating or shield, and then the resulting structure is mounted on the LCD PCB, with the touch screen circuitry mounted between the protective coating or shield and the LCD PCB. According to the invention, the substrate of the fingerprint sensor can be positioned on an opposite surface of the LCD with either of these methods.
- In the following figures, several examples of devices or systems configured according to the invention are illustrated.
- Referring to
FIG. 1 , a diagrammatic view of anexample LCD panel 100 having a printed circuit board (PCB) 102 for holding LCD components to provide a display.LCD panel 100 also includes optionaltouch screen circuitry 104 surrounded by abezel portion 106.Bezel 106 is relatively narrow on three sides oftouch screen circuitry 104, and wider along a fourth side, which includes afingerprint sensor 108 with a swipingarea 110 for capturing a fingerprint from a user. In this example,fingerprint sensor 108 is located outside the touch screen portion ofLCD panel 100. As discussed herein,fingerprint sensor 108 can be positioned on the opposite surface ofLCD panel 100 fromtouch screen circuitry 104. -
LCD panel 100 can be manufactured in a number of ways and, given this disclosure, one skilled in the art will find it feasible to design and produce such a device without undue experimentation.LCD panel 100 may be utilized in a variety of devices, such as a computing device, cellular phone, portable entertainment device, tablet device, and so forth. - Referring to
FIG. 2 , a side diagrammatic view of adevice 200 is illustrated with a top coating 202 (also referred to as a “protective layer”) havingtouch sensor circuitry 204 located on an inside portion of top coating/layer 202. Afingerprint sensor 206, layer described in greater detail below, is shown with a layer peeled back to illustrate the fingerprint sensor integrated with the LCD'sPCB 208. As discussed herein,fingerprint sensor 206 may be positioned on a surface ofPCB 208 that is opposite the surface on whichtouch sensor circuitry 204 is located. -
FIG. 3 illustrates an exploded view of anexample assembly 300, including anLCD PCB 302 and afingerprint sensor 310. In this example, amask 304 is applied to a surface ofLCD PCB 302.Mask 304 is any material covering a portion ofLCD PCB 302 that does not display images or other data. For example,mask 304 may include a black layer that is opaque or semi-transparent. Alternatively,mask 304 may include an ink or other colored pigment coating applied toLCD PCB 302, or applied to another layer, such as a protective layer or polyimide. - A
protective layer 306, which includestouch screen circuitry 308 on one side of the protective layer is applied tomask 304.Touch screen circuitry 308 may be applied to the entireprotective layer 306, or applied to the portion of the protective layer that aligns with the viewable opening inmask 304. In conventional assemblies,touch screen circuitry 308 may be adhered to or otherwise placed on the bottom side ofprotective layer 306 prior to assembly, and then placed or otherwise mounted on top ofLCD PCB 302 during final assembly. In other assembly methods,touch screen circuitry 308 may be assembled ontomask 304, then the next layer (protective layer 306) is placed on top of the LCD PCB havingtouch screen circuitry 308 andmask 304 already mounted thereon. -
Fingerprint sensor 310 has aswiping area 312. In one embodiment, swipingarea 312 is indicated onmask 304 by a swipe area marking 316. Since the bezel portion ofmask 304 may visuallyobscure fingerprint sensor 310, swipe area marking 316 is provided onmask 304 to indicate the desired fingerprint swiping area to the user ofassembly 300. In a particular implementation, swipe area marking 316 uses a color or other characteristic that distinguishes the swipe area marking from the bezel color (or mask color). For example, if the bezel color is black, swipe area marking 316 is a lighter color, such as white or silver. In the example ofFIG. 3 ,fingerprint sensor 310 is located on the opposite side ofLCD PCB 302 frommask 304 andprotective layer 306.Protective layer 306 can be a polyimide such as PET or PEN, or hard coat chemicals that can be applied to the surface ofLCD PCB 302. In a particular embodiment,fingerprint sensor 310 is bonded toLCD PCB 302 using an optically clear adhesive (OCA) or other bonding mechanism. In an alternate embodiment,fingerprint sensor 310 is positioned on the same side ofLCD PCB 302 asmask 304 andprotective layer 306. -
FIG. 4 illustrates a side view of an exampleLCD display device 400. The example ofFIG. 4 shows anLCD PCB 402 with amask layer 404 applied to one side of the LCD PCB.Touch screen circuitry 406 is then applied onmask layer 404 and aprotective layer 408 is applied on the touch screen circuitry. Additionally, afingerprint sensor 410 is applied to a side ofLCD PCB 402 that isopposite mask layer 404. In this configuration,fingerprint sensor 410 senses a user's fingerprint as they swipe their finger about the fingerprint sensor. -
FIG. 5 illustrates a side cut-away view of anexample device 500 including a touch screen and a fingerprint sensor.Device 500 includes ahousing 502, a printedcircuit board 504 and anLCD module 506. The device also includes aglass layer 508 onto which indium tin oxide (ITO) or similar materials are applied to form the touch screen circuitry. The ITO is shown on opposite sides ofglass layer 508 byreference numerals Device 500 further includes a layer ofprotective glass 510 positioned above theITO layer 512. Atouch circuit controller 516 is coupled toITO layers flexible circuit 518. Afingerprint sensor 520 is coupled to printedcircuit board 504 and positioned below theglass layer 508.Fingerprint sensor 520 senses fingerprint characteristics of a finger swiped along the surface ofprotective glass 510 proximate the fingerprint sensor. In a particular embodiment, layers 508 and 510 are non-conductive layers (e.g., glass).Fingerprint sensor 520 is capable of sensing ridges and valleys of a user's finger throughlayers fingerprint sensor 520 to the surface of protective glass 510 (where the user swipes their finger) is 150 microns or less. -
FIG. 6 illustrates a side cut-away view of anotherexample device 600 including a touch screen and a fingerprint sensor.Device 600 includes ahousing 602, a printedcircuit board 604 and anLCD module 606.Device 600 also includes aglass layer 608 onto which ITO or similar materials are applied to form the touch screen circuitry. AnITO layer 612 is shown as applied to one side ofglass layer 608.Device 600 further includes aprotective layer 610 positioned aboveglass layer 608. Atouch circuit controller 614 is coupled toITO layer 612 via aflexible circuit 616. Afingerprint sensor 618 is coupled to printedcircuit board 604 and positioned belowglass layer 608.Fingerprint sensor 618 senses fingerprint characteristics of a finger swiped along the surface ofprotective layer 610 proximate the fingerprint sensor. -
FIG. 7 illustrates an example method of assembling anLCD display device 700. The components shown inFIG. 7 are similar to those discussed above with respect toFIG. 3 , wheretouch screen circuitry 714 is shown separately from aprotective layer 716 prior to assembly. During the assembly process, amask layer 704 is applied to a surface ofLCD PCB 702. Afingerprint sensor 718 having a swipingarea 720 is applied to the opposite surface ofLCD PCB 702. In an alternate embodiment,fingerprint sensor 718 is positioned proximate the opposite surface ofLCD PCB 702 on its own PCB or other structure. - As shown in
FIG. 7 ,mask layer 704 includes anopening 708 that substantially aligns with a touch-sensitive portion ofLCD display device 700. Abezel portion 706 ofmask layer 704 includes a swipe area marking 710 that indicates the desired fingerprint swiping area to the user of the device. In the example ofFIG. 7 , atouch screen layer 712 includestouch screen circuitry 714 disposed thereon.Protective layer 716 is then applied totouch screen layer 712 to protecttouch screen circuitry 714 and other components ofLCD display device 700. -
FIG. 8 illustrates another example method of assembling anLCD display device 800. During the assembly process, atouch screen layer 804 having touch screen circuitry 806 thereon, is positioned above anLCD module 802. Next, aprotective layer 808 is placed overtouch screen layer 804 to protect touch screen circuitry 806. Afingerprint sensor 810 is positioned proximate a surface ofLCD module 802 oppositetouch screen layer 804. - Referring to
FIG. 9 , a diagrammatic view of asensing device 900 configured according to the invention is illustrated. The device includes alinear array 912 such as described in the embodiments above, and also includes asensor element 902. The device further includessensor control logic 952 configured to control the basic operations of the sensor element. The exact operations of the sensor element governed by the sensor logic control greatly depends on a particular sensor configuration employed, which may include power control, reset control of the pixels or data contact points, output signal control, cooling control in the case of some optical sensors, and other basic controls of a sensor element. Sensor controls are well known by those skilled in the art, and, again, depend on the particular operation. -
Sensing device 900 further includes areadout circuit 954 for reading analog output signals fromsensor element 902 when it is subject to a fingerprint juxtaposed on asensor surface 907.Readout circuit 954 includes anamplifier 956 configured to amplify the analog signal so that it can more accurately be read in subsequent operations. Alow pass filter 958 is configured to filter out any noise from the analog signal so that the analog signal can be more efficiently processed.Readout circuit 954 further includes an analog todigital converter 960 that is configured to convert the output signal fromsensor element 902 to a digital signal that indicates a series of logic 0's and 1's that define the sensing of the fingerprint features by the pixels or data contact points ofsensor surface 907. Such signals may be separately received by the motion sensors and the fingerprint sensing surfaces, and may be read out and processed separately. -
Readout circuit 954 may store the output signal in astorage 962, wherefingerprint data 964 is stored and preserved, either temporarily until aprocessor 966 can process the signal, or for later use by the processor.Processor 966 includes anarithmetic unit 968 configured to process algorithms used for navigation of a cursor, and for reconstruction of fingerprints.Processing logic 970 is configured to process information and includes analog to digital converters, amplifiers, signal filters, logic gates (all not shown) and other logic utilized by a processor. Apersistent memory 974 is used to storealgorithms 976 andsoftware applications 978 that are used byprocessor 966 for the various functions described above, and in more detail below. A system bus 980 is a data bus configured to enable communication among the various components contained insensing device 900. - In assembly, there are various ways such a device can be configured. In one embodiment, a fingerprint sensor is provided that includes a flexible substrate having fingerprint sensor lines on one surface and configured to be integrated with an LCD screen. This allows for a device such as a laptop, cellular phone, touch-screen interface, or other personal device to have an integrated fingerprint sensor, saving space and simplifying the integrated design.
- In another embodiment, the fingerprint sensor may be mounted on the LCD PCB separate from the touch screen circuitry. The touch screen circuitry may be mounted on the protective shield or coating. The resulting structure can then be mounted on the LCD PCB. This also provides an LCD screen with both touch screen circuitry and fingerprint sensor circuitry integrated therein.
- In yet another embodiment, the substrate is obviated by the protective coating. The protective coating is configured to hold touch screen circuitry together with the fingerprint sensor lines mounted on the protective coating or shield. Here, the protective coating can be mounted on an LCD screen together with the touch screen circuitry and the fingerprint sensor lines. In yet another combination, the touch screen circuitry can be mounted directly on the LCD PCB, the fingerprint sensor lines mounted on the protective coating or shield, and the two resulting structures can be mounted together to produce an LCD display having both touch screen and fingerprint sensor functionality.
- The resulting system is an LCD screen having an integrated fingerprint swipe sensor and, possibly, a touch screen. The LCD screen may have one or the other or both, depending on the application. The system includes an LCD surface configured to produce a visible display. On top of the LCD surface can be mounted touch screen circuitry that may include fingerprint sensor lines. Alternatively, a separate substrate holding the fingerprint sensor lines may be mounted on or below the touch screen circuitry. In either configuration, the resulting structure may be configured to be integrated with the LCD screen to allow the integrated fingerprint sensor lines to capture a fingerprint image without interfering with the visibility of the display or with the function of the touch screen operation.
- The system further includes a controller communicating with the fingerprint sensor lines to capture a fingerprint image when a user's fingerprint is swiped about the fingerprint sensor lines. In one system, there may be separate controllers for both the LCD display and the fingerprint sensor, where the system includes an LCD controller configured to control the visible display separate from the fingerprint sensor operations. Alternatively, the same controller may also control both the visible display and the fingerprint sensor operations. The fingerprint sensor could also be patterned onto the top glass of the LCD display itself, and not onto the touch-screen layer.
-
FIG. 10 is a flow diagram illustrating an embodiment of aprocedure 1000 for assembling an LCD display device. Initially, an LCD controller is mounted on a printed circuit board (block 1002) and a fingerprint sensor controller is mounted on the same printed circuit board (block 1004). An LCD module is mounted above the printed circuit board (block 1006). Fingerprint sensor circuitry is applied on one side of the LCD module (block 1008) and a mask layer is applied on an opposite side of the LCD module (block 1010). A motion sensor circuitry is then applied above the mask layer (block 1012) and a protective layer is applied above the motion sensor circuitry (block 1014). Finally, the LCD controller is connected to the motion sensor circuitry (block 1016) and the fingerprint sensor controller is connected to the fingerprint sensor circuitry (block 1018). -
FIG. 11 is a flow diagram illustrating another embodiment of aprocedure 1100 for assembling an LCD display device. Initially, an LCD controller is mounted on a printed circuit board (block 1102) and a fingerprint sensor controller is mounted on the same printed circuit board (block 1104). Fingerprint sensor circuitry is then applied to the printed circuit board (block 1106). An LCD module is mounted above the printed circuit board (block 1108) and a mask layer is applied on a side of the LCD module opposite the printed circuit board (block 1110). Motion sensor circuitry is applied to a clear protective layer (block 1112) and the clear protective layer is mounted to the LCD module to position the motion sensor circuitry between the mask layer and the clear protective layer (block 1114). The LCD controller is then connected to the motion sensor circuitry (block 1116) and the fingerprint sensor controller is connected to the fingerprint sensor circuitry (block 1118). - The present invention may also involve a number of functions to be performed by a computer processor, such as a microprocessor. The microprocessor may be a specialized or dedicated microprocessor that is configured to perform particular tasks according to the invention, by executing machine-readable software code that defines the particular tasks embodied by the invention. The microprocessor may also be configured to operate and communicate with other devices such as direct memory access modules, memory storage devices, Internet related hardware, and other devices that relate to the transmission of data in accordance with the invention. The software code may be configured using software formats such as Java, C++, XML (Extensible Mark-up Language) and other languages that may be used to define functions that relate to operations of devices required to carry out the functional operations related to the invention. The code may be written in different forms and styles, many of which are known to those skilled in the art. Different code formats, code configurations, styles and forms of software programs and other means of configuring code to define the operations of a microprocessor in accordance with the invention will not depart from the spirit and scope of the invention.
- Within the different types of devices, such as laptop or desktop computers, hand held devices with processors or processing logic, and also possibly computer servers or other devices that utilize the invention, there exist different types of memory devices for storing and retrieving information while performing functions according to the invention. Cache memory devices are often included in such computers for use by the central processing unit as a convenient storage location for information that is frequently stored and retrieved. Similarly, a persistent memory is also frequently used with such computers for maintaining information that is frequently retrieved by the central processing unit, but that is not often altered within the persistent memory, unlike the cache memory. Main memory is also usually included for storing and retrieving larger amounts of information such as data and software applications configured to perform functions according to the invention when executed by the central processing unit. These memory devices may be configured as random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), flash memory, and other memory storage devices that may be accessed by a central processing unit to store and retrieve information. During data storage and retrieval operations, these memory devices are transformed to have different states, such as different electrical charges, different magnetic polarity, and the like. Thus, systems and methods configured according to the invention as described herein enable the physical transformation of these memory devices. Accordingly, the invention as described herein is directed to novel and useful systems and methods that, in one or more embodiments, are able to transform the memory device into a different state. The invention is not limited to any particular type of memory device, or any commonly used protocol for storing and retrieving information to and from these memory devices, respectively.
- The term “machine-readable medium” should be taken to include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) that store the one or more sets of instructions. The term “machine-readable medium” shall also be taken to include any medium that is capable of storing, encoding or carrying a set of instructions for execution by the machine and that causes the machine to perform any one or more of the methodologies of the invention. The machine-readable medium includes any mechanism that provides (i.e., stores and/or transmits) information in a form readable by a machine (e.g., a computer, PDA, cellular telephone, etc.). For example, a machine-readable medium includes memory (such as described above); magnetic disk storage media; optical storage media; flash memory devices; biological electrical, mechanical systems; electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.). The device or machine-readable medium may include a micro-electromechanical system (MEMS), nanotechnology devices, organic, holographic, solid-state memory device and/or a rotating magnetic or optical disk. The device or machine-readable medium may be distributed when partitions of instructions have been separated into different machines, such as across an interconnection of computers or as different virtual machines.
- Embodiments of the systems and methods described herein facilitate integrated fingerprint sensing and display of information. Some embodiments are used in conjunction with one or more conventional fingerprint sensing systems and methods. For example, one embodiment is used as an improvement of existing fingerprint detection and/or sensing systems. Other embodiments are used in conjunction with one or more conventional display systems and methods. For example, one embodiment is used as an improvement of existing display devices.
- Although the components and modules illustrated herein are shown and described in a particular arrangement, the arrangement of components and modules may be altered to sense fingerprint information or to display information in a different manner. In other embodiments, one or more additional components or modules may be added to the described systems, and one or more components or modules may be removed from the described systems. Alternate embodiments may combine two or more of the described components or modules into a single component or module.
- Although specific embodiments of the invention have been described and illustrated, the invention is not to be limited to the specific forms or arrangements of parts so described and illustrated. The scope of the invention is to be defined by the claims appended hereto and their equivalents.
Claims (16)
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US13/099,983 US9400911B2 (en) | 2009-10-30 | 2011-05-03 | Fingerprint sensor and integratable electronic display |
US13/454,432 US9274553B2 (en) | 2009-10-30 | 2012-04-24 | Fingerprint sensor and integratable electronic display |
US14/339,656 US9158958B2 (en) | 2010-10-28 | 2014-07-24 | Signal strength enhancement in a biometric sensor array |
US14/880,887 US9542589B2 (en) | 2010-10-28 | 2015-10-12 | Signal strength enhancement in a biometric sensor array |
US15/056,504 US10048787B2 (en) | 2009-10-30 | 2016-02-29 | Fingerprint sensor and integratable electronic display |
US15/384,149 US10049254B2 (en) | 2010-10-28 | 2016-12-19 | Signal strength enhancement in a biometric sensor array |
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US12/916,000 US20110102569A1 (en) | 2009-10-30 | 2010-10-29 | Systems and Methods for Sensing Fingerprints Through a Display |
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WO2011053797A1 (en) | 2011-05-05 |
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US20110102567A1 (en) | 2011-05-05 |
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TW201120763A (en) | 2011-06-16 |
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