Patent Publication Number: US-2021193729-A1

Title: Single contact relief print generator

Description:
BACKGROUND 
     A biometric relief print generator device, such as a fingerprint recognition device, is used for various purposes including security check, identity verification. A person&#39;s body-part can contact the generator, where a relief print image may be captured of the body-part, such as a fingerprint. The biometric relief print generator device may use an electrode-based, electro-luminescence component that can utilize an electrical connection between a relief object and the electro-luminescence component. To complete the electrical connection, a body-part, such as a finger, typically needs to contact both a surface of the device and a contact electrode, which is usually built in a bezel disposed at a perimeter of the surface. Having a bezel makes the device heavy, bulky and less portable. In addition, it is sometimes difficult and inconvenient to have a finger contact a surface and a bezel at the same time, especially for young children and people with rheumatic diseases. 
     SUMMARY 
     This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. 
     As provided herein, systems and methods are disclosed for incorporating more than one electrode in an electrode layer, which may allow for a device without a contact electrode, resulting in a more useful and user-friendly biometric relief print generator device. 
     In one implementation of a system for generating a relief print image, an electrode layer in a light emitting layer comprises multiple electrodes. In this implementation, the electrodes may be electrically connected to different power sources, thereby voltage characteristics on respective electrodes can be different at a given time. For example, when a biometric object touches a surface of a relief print generator device, an electrical circuit can be created between the biometric object and more than one electrode in the electrode layer. In this way, an electro-luminescent component can be activated by electrical charge, and emit light indicative of a relief print of the biometric object. 
     In one implementation of a method for fabricating an electrode layer with more than one electrode, a transparent single-electrode panel can be utilized. In this implementation, the transparent single-electrode panel can be scribed using laser. Further a dielectric bridge layer may be disposed over the scribed single-electrode panel to provide insulation, and a conductive crossover layer may be disposed over the dielectric bridge layer to provide electrical connection. In this way, an electrode layer with more than one electrode can be created. 
     To the accomplishment of the foregoing and related ends, the following description and annexed drawings set forth certain illustrative aspects and implementations. These are indicative of but a few of the various ways in which one or more aspects may be employed. Other aspects, advantages and novel features of the disclosure will become apparent from the following detailed description when considered in conjunction with the annexed drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       What is disclosed herein may take physical form in certain parts and arrangement of parts, and will be described in detail in this specification and illustrated in the accompanying drawings which form a part hereof and wherein: 
         FIG. 1  is a component diagram illustrating an example body-part relief print generation environment where one or more portions of one or more techniques and/or one or more systems described herein may be implemented. 
         FIG. 2  illustrates an example implementation where one or more portions of one or more techniques described herein may be implemented. 
         FIG. 3  illustrates an example implementation where one or more portions of one or more techniques described herein may be implemented. 
         FIG. 4A  is a component diagram illustrating an example implementation from a prior art. 
         FIG. 4B  is a component diagram illustrating an example implementation, where one or more portions of one or more techniques described herein may be implemented. 
         FIG. 5  is a component diagram illustrating an example implementation of at least a portion of one or more systems described herein. 
         FIG. 6  is a component diagram illustrating an example implementation of at least a portion of one or more systems described herein. 
         FIG. 7  is diagram illustrating a circuit used by an example implementation of at least a portion of one or more systems described herein. 
         FIG. 8  is a component diagram illustrating an example implementation of at least a portion of one or more systems described herein. 
         FIG. 9  is a flow diagram illustrating an exemplary method for manufacturing a component of a system for producing a relief print image. 
         FIG. 10  is a flow diagram illustrating an exemplary method for manufacturing a system for producing a relief print image. 
         FIG. 11  is a flow diagram illustrating an exemplary method for using a biometric sensor. 
         FIG. 12  illustrates an exemplary computing environment wherein one or more of the provisions set forth herein may be implemented. 
     
    
    
     DETAILED DESCRIPTION 
     The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are generally used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the claimed subject matter. It may be evident, however, that the claimed subject matter may be practiced without these specific details. In other instances, structures and devices may be shown in block diagram form in order to facilitate describing the claimed subject matter. 
       FIG. 1  is a component diagram illustrating an example biometric relief print generation environment  100  where one or more portions of one or more techniques and/or one or more systems described herein may be implemented. As shown in the example environment  100 , an example biometric relief print generation system  102 , such as a fingerprint recognition system, may comprise a light emitting layer  104  that is configured to emit one or more photons  120  from a portion of the light-emitting layer  104  that receives contact from a biometric object  118 . The example biometric relief print generation system  102  may further comprise a sensor arrangement  106 . 
     In one implementation, the light emitting layer  104  may comprise an electrode-based (e.g., single electrode, multiple electrodes), electro-luminescent layer  108 , and/or an electrical connection  110  (e.g., a power source, such as an A/C source), which may provide an electrical power to activate the electro-luminescent layer  108 . Further, in one implementation, the light emitting layer  104  may comprise an electrode layer  112  (e.g., comprising an indium tin oxide (ITO) material, which may be attached to a polymer substrate), and/or a dielectric layer  114  (e.g., a conductive/insulating layer that allows current to pass). In one implementation, the light emitting layer  104  and the sensor arrangement  106  may be separated at a distance  116  to each other or may be arranged such that the sensor arrangement  106  is in contact with the light emitting layer  104 . As one example, when a biometric relief print generation system  102  is activated (e.g., by placing a finger at a scanning surface), light produced by the light emitting layer  104  is emitted in respective directions, such as directed toward the sensor arrangement  106 . 
     In one implementation, the sensor arrangement  106  can be operably engaged with the light emitting layer  104 , such that the sensor arrangement  106  is disposed in a path of the directions of the emitted photons  120 . The sensor arrangement  106  may comprise an image sensor that can convert an optical image into an electronic signal, for example, for digital processing of a captured optical image. That is, for example, the image sensor may comprise photosensitive material that results in an electrical signal being produced when one or more photons  120  impact the material. In this way, for example, a location and/or number of photons impacting the sensor arrangement  106  may be indicated by a number (e.g., or power) of electrical signals, from an area of the sensor arrangement  106  subjected to the photon  152  impacts. In one implementation, the resulting electrical signals may comprise data indicative of a representation (e.g., image) of the contact area(s) of the biometric object  118 . 
     In one implementation, the image capture component  106  may comprise an active pixel sensor (APS) or passive pixel sensor (PPS), such as a thin film sensor (e.g., photo-sensitive thin film transistor (TFT), thin film photo-diode, photo-conductor) or complementary metal-oxide semiconductor (CMOS). As another example, the sensor arrangement  106  may comprise a charge-coupled device (CCD), a contact image sensor (CIS), or some other light sensor that can convert photons into an electrical signal. Of note, the illustration of  FIG. 1  is merely an exemplary implementation of the biometric relief print generation system  102  and is not intended to provide any limitations. That is, for example, the distance  116  illustrated between the light emitting layer  104  and the sensor arrangement  106  is exaggerated for purposes of explanation, and may or may not be present in the exemplary biometric relief print generation system  102 . 
     As an illustrative example,  FIG. 2  is a component diagram illustrating an example implementation  200 , where one or more portions of one or more techniques and/or one or more systems described herein may be implemented. The example implementation  200  may comprise a portion of a light emitting layer (e.g.,  104  of  FIG. 1 ) that can be utilized in a relief print generator. 
     In  FIG. 2 , an example implementation of a portion of a light emitting layer  202  can comprise an electro-luminescent layer  204 . In this implementation  200 , the electro-luminescent layer  204  can be comprised of electro-luminescent particles  206  (e.g., quantum dots and fluorescent particles, such as phosphor-based materials, such as phosphor-based inorganic crystal materials with a transitional metal as a dopant or activator, zinc sulfide-based materials, cadmium sulfide-based materials, gallium-based materials, other semi-conductor materials, etc.) and a binder material  208 . In one implementation, when a biometric object  248  (e.g., finger or other body part) contacts the light emitting layer  202  and provides the electrical charge  246 , the electro-luminescent particles  206  may be converted to activated particles  210 , when subjected to the electrical charge  246 , merely at the location of the touch. Further, in this implementation, the activated particles  210  may emit photons  242 , for example, thereby producing light when subjected to the electrical charge  246 . 
     In  FIG. 2 , the example implementation of the portion of the light emitting layer  202  can comprise a dielectric layer  212  and an electrode layer  214 . In this example implementation  200 , the dielectric layer  212  is resident over the top portion of, and in contact with, the electro-luminescent layer  204 . The electrode layer  214  is resident under the bottom portion of, and in contact with, the electro-luminescent layer  204 . Further, the example implementation  200  of the portion of the light emitting layer  202  can comprise a power source  216 , such as an alternating current (AC) power source in electrical connection with the electrode layer  214 . 
     In one implementation, a biometric object  248  may contact the scanning surface  218  (e.g., top layer of the light emitting layer  202 ). In this implementation, for example, upon contacting the scanning surface  218 , an electrical circuit may be created by the potential difference between the electrical potential of a human (e.g., provided by membrane potential) and an electrical potential of the electrode layer  214 , thereby allowing current  242  to flow inside some portion of the electro-luminescent layer  204 . Additionally, the current  242  passing through the dielectric layer  212  can activate the electro-luminescent particles  204  merely at the location of the contact. Upon activation, the activated particles  210  may emit photons  242  merely at the location of the contact of the portions of the biometric object  248  (e.g., fingerprint ridges). In this way, for example, an illuminated relief print (e.g., fingerprint) of the biometric object  248  (e.g., finger) may be produced when the biometric object  248  contacts the scanning surface  218 . 
     As an illustrative example,  FIG. 3  is a component diagram illustrating an example implementation  300 , where one or more portions of one or more techniques and/or one or more systems described herein may be implemented. The example implementation  250  may comprise a portion of a senor arrangement (e.g.,  106  of  FIG. 1 ) that can be utilized in a relief print generator. 
     As shown in  FIG. 3 , a relief print scanner can comprise an image sensor  252  that may be used to capture an optical image (e.g., an image of a fingerprint) by converting incoming photons into an electronic signal, for example, for digital processing of the captured image. In one implementation, the image sensor  252  may comprise a thin film sensor array. For example, a thin film sensor-array may be used to detect photons emitted by a light emitting component  254  (e.g., the light emitting layer  202  of  FIG. 2 ). Here, as an example, the image sensor  252  can detect light produced by the light emitting component  254  (e.g., produced in the form of a relief print) and produce an image using a photo-current, by converting the detected photons into an electrical signal. 
     In the example implementation  250 , a photo-sensitive layer  256  (e.g., comprising SiH, amorphous silicon) may be formed between a first source electrode  258  and a first drain electrode  260  of a light sensing unit  262 . When an electrical charge is applied to a first gate electrode  264 , the photo-sensitive layer  256  becomes responsive to light, for example, where the photo-sensitive layer  256  may become electrically conductive when incident to photons of light. As one example, when light is incident on the photo-sensitive layer  256  over a predetermined, threshold light amount, the first source electrode  258  and the first drain electrode  260  may become electrically connected. Therefore, in this example, light generated from the light emitting component  254  (e.g., comprising a fingerprint pattern) may be received by the photo-sensitive layer  256 , which may cause an electrical signal to pass from the first source electrode  258  to the first drain electrode  260 , providing an electronic signal indicative of the light received. 
     Further, a switching unit  266  of the image sensor  252  can comprise a second source electrode  268 , a second drain electrode  270  and an intrinsic semiconductor layer  272 . As one example, when a negative charge is applied to a second gate electrode  274 , the intrinsic semiconductor layer  272  may become electrically conductive, thereby allowing the electrical signal created at the light sensing unit  262  to pass from the second source electrode to the second drain electrode (e.g., and to an electrical signal reading component for converting to a digital image). In this way, for example, the switching unit  266  may be used to control when an electrical signal indicative of a particular amount of light may be sent to an electrical signal reading component (e.g., for processing purposes and/or to mitigate signal interference with neighboring light sensing units). 
     Additionally, in this implementation  250 , a light shielding layer  276  may be resident over the top portion of the switching unit  266 . As one example, the light shielding layer  276  may mitigate intrusion of light to the intrinsic semiconductor layer  272 , as light can affect the electrical conductivity of the intrinsic semiconductor layer  272 . The image sensor  252  may also comprise a substrate  278  of any suitable material, onto which the layers of the image sensor  252  may be formed. As one example, when a biometric object  280  (e.g.,  244  of  FIG. 2A ) comes into contact with a contact surface (e.g., top surface) of the light emitting component  254 , an electrical current may pass through the biometric object  280 , and into the light emitting component  254 . In this example, the light emitting component  254  may emit photons  282  that are incident to the photo-sensitive layer  256 , thereby allowing an electrical signal (e.g., indicative of the number of photons received) to pass from the first source electrode  258  to the second drain electrode  270 , and to a signal reading component. 
       FIG. 4A  is a component diagram illustrating an example implementation  300   a  where one or more portion of one or more techniques may be implemented.  FIG. 4B  is a component diagram illustrating an example implementation  300   b  where one or more portion of one or more techniques described herein may be implemented.  FIGS. 4A, 4B  together illustrates an improvement on one or more portion of one or more techniques. 
     The example implementation  300   a  of the portion of the biometric relief print generator  310   a  can comprise a light emitting component  312   a  and an electrical connection  314   a  (e.g., a power source, such as an A/C source). Further, in one implementation, the biometric relief print generator  310   a  may comprise a contact electrode  320 . The contact electrode  320  can comprise a conductive element disposed at least partially around a perimeter of a scanning surface  316   a  (e.g.  218  of  FIG. 2 ). The electrical connection can electrically connect the contract electrode  320  and an electrode layer (e.g.,  214  of  FIG. 2 ). In this way, for example, when a biometric object  318   a  contacts both a scanning surface  316   a  and at least a portion of the contact electrode  320 , an electrical circuit may be created between the contact electrode  320  and the electrical layer, thereby allowing current to flow between the contact electrode  320  and the electrode layer. For example, electrical charge (e.g.,  246  of  FIG. 2 ) may move from the contact electrode  320 , through at least a portion of the biometric object  318   a , to the electrode layer disposed under and in contact with an electro-luminescent layer (e.g.,  204  of  FIG. 2 ). As described in  FIG. 2 , in one implementation, when electrical charge is provided for the light-emitting layer  202 , the electro-luminescent particles  206  may be converted to activated particles  210  and emit photons  242  at the location of the electrical charge  246 . In this way, for example, an illuminated relief print (e.g., fingerprint) of the biometric object  318   a  (e.g., finger) may be produced when the biometric object  318   a  contacts both the contact electrode  320  and the scanning surface  316   a.    
     In one respect, the need to incorporate a contact electrode  320  in a biometric relief print generator  310   a  can limit the use of the generator  310   a . Contact electrodes can be incorporated in a bezel around at least a portion of a perimeter of a scanning surface of the biometric relief print generator, which may make the generator bulky in size and heavy in weight. In another respect, in one implementation of one relief print generation environment, a fingerprint image may be generated upon a finger contacting both the contact electrode (e.g., a bezel) and the scanning surface. It may be difficult for small children to lay their fingers flat on a surface, thereby consuming more time to finish the fingerprint scanning and/or identification. Additionally, having a finger contacting both a scanning surface and a contact electrode at the periphery of the scanning surface may be physically difficult for people with rheumatic diseases or Parkinson diseases, and other users may merely misalign their fingers, taking more time and effort to collect images of prints. 
     As illustrated in  FIG. 4B , in the example implementation  300   b , a contact electrode may not be present in the example device. The example implementation  300   b  of the portion of the biometric relief print generator  310   b  can comprise a light emitting component  312   b  and an electrical connection  314   b  (e.g., multiple power sources with different voltage phases, such as an A/C source). The electrical connection  314   b  can be electrically connected to an electrode layer (e.g.,  214  of  FIG. 2 ). In addition, the electrode layer may comprise more than one electrode having different electrical potentials at a given time. In this way, for example, when a biometric object  318   b  contacts at least of a portion of a scanning surface  316   b , an electrical circuit may be created between the biometric object  318  and two or more electrodes in the electrode layer, thereby allowing current to flow through the light emitting component  312   b  between the biometric object  318   b  and the electrode layer. For example, electrical charge (e.g.,  246  of  FIG. 2 ) may move from the biometric object  318   b , through the light emitting component  312   b  to a first electrode in the electrode layer, to a second electrode on the electrode layer, and through the light emitting component  312   b  back to the biometric object  318   b . As described in  FIG. 2 , in one implementation, when electrical charge is provided for the light-emitting layer  202 , the electro-luminescent layer  204  may emit photons  242  at the location of the electrical charge  246 . In this way, for example, an illuminated relief print (e.g., fingerprint) of the biometric object  318   b  (e.g., finger) may be produced when the biometric object  318   b  contacts the scanning surface  316   b.    
       FIG. 5  illustrates a component diagram of an example implementation of one or more portions of one or more systems described herein. As an example, a light emitting layer  400  may comprise one or more layers, and may be used to generate photons at a location of a biometric object&#39;s touch to the surface of the light emitting layer  400 . In the example implementation of  FIG. 5 , the light emitting layer  400  can comprise a transparent, insulating substrate layer  402 . As an example, the substrate layer  402  may comprise any suitable material (e.g., glass, polymer, polyester, etc.) configured to perform as a substrate onto which the other layers may be formed, and which comprise an optically transparent material. 
     Further, the example light emitting layer  400  can comprise an electrode layer  404  having more than one electrode, the electrode layer can comprise any suitable, transparent conducting film. More details about the electrode layer will be illustrated below with reference to  FIGS. 6, 7, 8 . In some implementations, a reinforcement layer (not shown) may be disposed on top of the electrode layer  404 . As an example, the reinforcement layer may be comprised of any suitable material that can be configured to provide some rigidity and reinforcement between an electro-luminescent layer  406  and the electrode layer  404 . The electro-luminescent layer  406  (e.g.,  204  of  FIG. 2 ) can be configured to convert an electrical charge into photons indicative of a location and strength of the electrical field, as described above. That is, for example, a user&#39;s finger may provide a conduit for an electrical charge to the electro-luminescent layer  406 , which can convert electro-luminescent particles in the layer  406  into activated particles, thereby releasing one or more photons in response to the electrical charge. 
     As illustrated in  FIG. 5 , in one example, the light emitting layer  400  can comprise a shielding layer  408 , disposed on top of the electro-luminescent layer  406 . The shielding layer  408  may be comprised of any suitable material that can be configured to mitigate emission of photons from the top surface of the electro-luminescence layer  406 , for example, by providing a light blocking ability; and may be appropriately deposited, and remain resident, on the electro-luminescent layer  406 . In this way, for example, photons released by the electro-luminescent layer  406  can merely be directed toward the bottom of the light emitting layer  400  (e.g., toward an image sensor). A dielectric layer  410  can be disposed on top of the shielding layer  408 , and may be configured to provide insulation and pass electrical current when appropriate, as described above (e.g.,  212  of  FIG. 2 ). Further, a protective layer  412  may be deposited on top of the dielectric layer  410 . The protective layer  412  can be configured to mitigate physical damage to the surface of the light emitting layer  400  and provide protection from liquids. Additionally, the protective layer may comprise an abrasion resistive layer, a liquid resistive layer, and/or a shock resistive layer to mitigate the electrical charge passing to the biometric object (e.g. finger). Further, in one implementation, a surface of the protective layer  412  may be used as a scanning surface (e.g.,  218  of  FIG. 2 ) where a biometric object contacts to active the electro-luminescent layer  406 . 
     Additionally, two or more of the shielding layer  408 , the dielectric layer  410  and the protective layer  412  can be integrally formed into a single layer. For example, the shielding layer  408  and the dielectric layer can be integrally formed into an opaque dielectric layer. The opaque dielectric layer may be configured to provide insulation and pass electrical current when appropriate, and to mitigate emission of photons from the top surface of the electro-luminescence layer  406 . As another example, the shielding layer  408 , the dielectric layer  410  and the protective layer  412  can be integrally formed into a top layer disposed over the electro-luminescent layer  406 . The top layer can be configured to provide insulation and pass electrical current, to mitigate photons from the top surface of the electro-luminescent layer  406 , and also to mitigate physical damage to the light emitting layer  400  and to serve as a scanning surface (e.g.,  218  of  FIG. 2 ) of the biometric relief print generator. 
     As an illustrative example, the exemplary light emitting layer  400  may comprise a contact light emitting device, made up of one or more of the example layers  402 - 412 . In this example, when an electric field is formed between an object to be imaged, such as a biometric object (e.g., one or more fingers or a hand) and the electrode layer  404 , the electro-luminescent layer  406  can emit photons indicative of an image of at least a portion of the biometric object. 
       FIG. 6  illustrates a component diagram of an example implementation of one or more portions of one or more systems described herein. As an example, an electrode layer  500  may comprise a transparent, insulating electrode layer substrate  502 . As an example, the electrode layer substrate  502  may comprise any suitable insulating material (e.g., glass, polymer, polyester, etc.) configured to perform as a substrate onto which the other layers may be formed, and which comprise an optically transparent material. The substrate layer (e.g.,  402  of  FIG. 5 ) may function as the electrode layer substrate  502 . In the example implementation of  FIG. 6 , the electrode layer  500  may further comprise more than one electrode (e.g., four electrodes). A first electrode  504 , a second electrode  506 , a third electrode  508  and a fourth electrode  510  may be disposed adjacent to one another and separated by an electrode gap  512  to each other. As an example, the gap distance may be less than 1 pixel wide and therefore may not create detectable interference (e.g., visible lines) that could compromise the quality of the relief print of a biometric object (e.g., a fingerprint.). 
     In the electrode layer  500  of the example implementation in  FIG. 6 , the first electrode  504 , the second electrode  506 , the third electrode  508 , and the fourth electrode  510  can be electrically connected to a first power source  514 , a second power source  516 , a third power source  518 , and a fourth power source  520 , respectively. In this way, for example, respective electrodes  504 ,  506 ,  508 ,  510  can be provided electrical power with different characteristics. In some examples, the power sources  514 ,  516 ,  518 ,  520  can comprise A/C sources. Further, in some implementations, respective power sources  514 ,  516 ,  518 ,  520  can provide different voltage phases. That is, the characteristics (e.g., phases) of the A/C voltage provided to the electrodes  504 ,  506 ,  508 ,  510  by corresponding power sources  514 ,  516 ,  518 ,  520  may be different for each electrode. In this way, at a given time, the electrical potential of different electrodes  514 ,  516 ,  518 ,  520  can be different. As described in  FIG. 4B , above, this may allow the device to provide an electrical circuit between a biometric object and more than one electrode, which can mitigate the use of a contact electrode in a biometric relief print generator. 
     Of note, the illustration of  FIG. 6  is merely an exemplary implementation of the electrode layer  500  and is not intended to provide any limitations. The number of electrodes in the electrode layer is not limited to four. That is, for example, there may be less than four or more than four electrodes in the electrode layer. Further, electrodes in an electrode layer may be disposed in a different fashion from the illustration of  FIG. 6 . 
       FIG. 7  is diagram illustrating an exemplary electrical circuit  600  used by an example implementation of at least a portion of one or more systems described herein. In the exemplary electrical circuit  600 , electrical devices (e.g., resistance(s)  608  and/or coupling inductance(s)  604 ,  606 ) may be used to modify the voltage, level and/or phases of a base power source  602 . As a result, the power sources  514 ,  516 ,  518 ,  520  at an output end of the electrical circuit  600  may have different voltage phases. As an example, the first power source  514  and the third power source  518  may be electrically coupled with two output ends of a first coupling inductance  604 , thereby comprising a 180° phase difference from each other. Further, a second coupling inductance  606  may be configured to have a 90° phase difference from the first coupling inductance  604 . The second electrode  516  and the fourth electrode  520  may be electrically coupled with two output ends of the second coupling inductance  606 , thereby comprising a 180° phase difference from each other. In this way, the phase difference between the first power source  514  and the second power source  516 , the phase difference between the second power source  516  and the third power source  518 , the phase difference between the third power source  518  and the fourth power source  520 , and the phase difference between the fourth power source  520  and the first power source  514  can be 90°. 
     With reference to  FIG. 6 , in this example, with continued reference to  FIG. 4B , a gap voltage may be the voltage applied at respective gaps  512  between the electrodes  504 ,  506 ,  508 ,  510 . Further, in this example, a body voltage may be a voltage applied across the light emitting component  312   b  from first electrode in the electrode layer to the biometric object  318   b  (e.g., and/or from the biometric object to the second electrode). As an example, the body voltage may be half of the gap voltage, and the combined body voltages (e.g., to the biometric object and back) may be equivalent to the gap voltage. As described above, an electrical charge (e.g.,  246  of  FIG. 2 ) may move from the biometric object  318   b , through the light emitting component  312   b  to a first electrode in the electrode layer, to a second electrode on the electrode layer, and through the light emitting component  312   b  back to the biometric object  318   b.    
     In one implementation, by using the exemplary electrical circuit  600 , the voltage phase difference between adjacent electrodes may be 90° when the electrodes  504 ,  506 ,  508 ,  510  are disposed in the fashion illustrated in  FIG. 6  and connected to power sources  514 ,  516 ,  518 ,  520  respectively. In this way, a gap voltage at the electrode gaps  512  may have different characteristics than a body voltage on the electrodes  504 ,  506 ,  508 ,  510 . For example, an average voltage gradient at the electrode gap  512  may be lower than an average voltage gradient at the electrodes  504 ,  506 ,  508 ,  510 . In one example, having a lower average voltage gradient at the respective electrode gaps than at the electrodes can help to reduce or eliminate the appearance of bright lines that are indicative of electrode gaps on a relief print image, and thereby improving the quality of the relief print image. 
       FIG. 8  illustrates a component diagram of an example implementation of one or more portions of one or more systems described herein. As an example, an electrode layer  650  may comprise one or more layers, which can be used to provide voltage potential(s) to activate an electro-luminescent component of biometric relief print generator upon a contact from a biometric object. In the example implementation of  FIG. 8 , the electrode layer  650  can comprise an electrode layer substrate  652 . As an example, the electrode layer substrate  652  may comprise any suitable insulating material (e.g., glass, polymer, polyester, etc.) configured to perform as a substrate onto which the other layers may be formed, and which comprise an optically transparent material. As an example, the substrate layer ( 402  of  FIG. 5 ) of the light emitting layer ( 400  of  FIG. 5 ) may function as the electrode layer substrate  502 . 
     Further, the example electrode layer  650  can comprise a transparent electrode panel  654 . As an example, the transparent electrode panel may have scribed lines  660  on at least one surface (e.g., a surface opposite to the surface contacting the electrode layer substrate  652 ). For example, the scribed line(s)  660  can be made using laser on a transparent, single-electrode panel (e.g., comprising an indium tin oxide (ITO) material) (e.g., or another optically transparent conductor). The scribed lines  660  may be used to create multiple electrodes (e.g.,  504 ,  506 ,  508 ,  510  of  FIG. 6 ) on the transparent electrode panel  654 . As an example, the multiple electrodes may be connected to power sources with different voltage phases, which can be used in lieu of an exterior contact electrode to create a complete electric, as described in  FIGS. 4B and 6 . 
     As illustrated in  FIG. 8 , in one example, the electrode layer  650  can comprise a dielectric bridge layer  656 , disposed on top of the transparent electrode panel  654 . The dielectric bridge layer  656  may be configured to provide insulation and pass electrical current when appropriate (e.g. a conductive/insulating layer). As an example, the dielectric bridge layer  656  may be configured to cover a portion of the transparent electrode panel  654  where insulation is needed. The electrode layer  650  may further comprise a conductive crossover layer  658  disposed on top of the dielectric bridge layer  656 . As an example, the conductive crossover layer  658  may comprise any suitable conductive material (e.g., metal, alloy, conductive polymer, etc.) configured to provide electrical connection between two conductive parts. For example, the conductive crossover layer  658  can be configured to provide electrical connection between the electrodes (e.g.,  504 ,  506 ,  508 ,  510  in  FIG. 6 ) and the power sources (e.g.,  514 ,  516 ,  518 ,  520  in  FIG. 6 ). The power source may have different phases (e.g., 90° apart from each other), such that different electrodes may have different voltage levels or phases at a given time when connected to the power sources. 
       FIG. 9  is a flow diagram illustrating an exemplary method  700  for manufacturing an electrode layer for a biometric relief print generator. The exemplary method  700  begins at  702 . At  704 , a transparent electrode panel is disposed over an electrode layer substrate. For example, the transparent electrode panel may comprise an indium tin oxide (ITO) material or another suitable conductive material which is optically transparent. At  706 , the transparent electrode panel is scribed to create multiple electrodes. As an example, laser may be used to scribe a set of lines on the transparent electrode panel, resulting in electrodes separated by the scribed lines. The set of lines may be less than 1 pixel wide respectively, for example, thereby the scribe line may not compromise the quality of the relief print image indicative of a biometric object. 
     At  708 , a dielectric bridge layer is disposed over the transparent electrode panel. The dielectric bridge layer may be configured to provide insulation at a portion of the transparent electrode panel and to pass electrical current at a different portion of the transparent electrode panel. At  710 , a conductive crossover layer is disposed over the dielectric bridge layer. The conductive crossover layer may comprise a conductive material (e.g., metal, alloy, conductive polymer, etc.) and may be configured to provide electrical connection between two conductive components. For example, the conductive crossover layer may electrically connect the multiple electrodes in the transparent electrode panel to power sources. Additionally, as an example, the conductive crossover layer may be merely deposited over a portion of dielectric bridge layer. Having the conductive cross layer disposed over the dielectric bridge layer, the exemplary method  700  ends at  712 . 
       FIG. 10  is a flow diagram illustrating an exemplary method  750  for manufacturing a biometric relief print generator. The exemplary method  750  begins at  752 . From  704  to  710 , the same methods as in exemplary method  700  may be used to manufacture an electrode layer for the biometric relief print generator. At  704 , a transparent electrode panel is disposed over an electrode layer substrate. At  706 , the transparent electrode panel is scribed to create multiple electrodes. For example, laser may be used to scribe a set of lines on the transparent electrode panel. At  708 , a dielectric bridge layer is disposed over the transparent electrode panel. The dielectric bridge layer may be configured to provide insulation and pass electrical current when appropriate. At  710 , a conductive crossover layer is disposed over the dielectric bridge layer. The conductive crossover layer may be configured to provide electrical connection between two conductive components (e.g., between one of the electrodes and one of the power sources). 
     After having the electrode layer manufactured, at  754 , an electro-luminescent layer may be deposited on the conductive crossover layer of the electrode layer, at a desired location. As an example, the electro-luminescent layer may comprise phosphor material or other suitable electro-luminescent material that can emit photons when activated by electrical charge. At  756 , a dielectric layer and a shielding layer may be disposed over the electro-luminescent layer, and thereby a light emitting layer may be formed. The dielectric layer and the shielding layer may be separate layers, or may be an integral layer that is configured to both provide insulation and pass electrical current when appropriate, and to mitigate photon emission from one surface of the electro-luminescent layer. At  758 , an image sensor may be coupled to the light emitting layer. The image sensor may be disposed in a path of directions of the photons emitted from the light emitting layer. For example, the image sensor may comprise two or more sensor arrays coupled together to convert emitted photons into electrical signals. Having the image sensor coupled to the light emitting layer, the exemplary method  750  ends at  760 . 
       FIG. 11  is a flow diagram illustrating an exemplary method  800  for using a biometric relief print generation system. The exemplary method  800  begins at  802 . At  804 , a biometric object may contact a scanning surface of the biometric relief print generation system. As an example, a user may contact the surface using a finger, two or more fingers, a hand, or other body parts. At  806 , a light emitting layer may emit photons toward an image sensor arrangement. For example, as described above, the light emitting layer may covert an electrical charge, conducted by the biometric object, into photons indicative of the biometric object. 
     Further, as in one implementation, the image sensor arrangement may comprise an APS, TFT, CMOS, CCD, CIS, or some other light sensor that can convert photons into an electrical signal. In another implementation, the image sensor arrangement may be disposed beneath the light emitting layer as a thin film sensor (e.g., TFT or the like). 
     At  808  of the exemplary method  800 , the image sensor arrangement can receive the photons indicative of the biometric object. That is, for example, the photons emitted by the light emitting layer may impact light sensitive portions of the image sensor arrangement, where the photons are indicative of an image of the object that contacted scanning surface at the electroluminescent layer location. At  810 , the image sensor arrangement can convert the photons to electrical signals, as described above. At  812 , the electrical signals can be converted to data indicative of an image representing at least a portion of the biometric object. That is, for example, the electrical signals can be indicative of a number and location of photons that impacted the image sensing component. In this example, the number and location of photons indicated by the electrical signals can be converted to image data representing an image of the object that contacted the surface (e.g., fingerprint(s) or handprint(s)). 
     Having converted the electrical signals to data indicative of an image of the biometric object, the exemplary method  800  ends at  814 . 
     In another implementation, one or more of the systems and techniques, described herein, may be implemented by a computer-based system. An example computer-based system environment is illustrated in  FIG. 11 . The following discussion of  FIG. 11  provides a brief, general description of a computing environment in/on which one or more or the implementations of one or more of the methods and/or system set forth herein may be implemented. The operating environment of  FIG. 11  is merely an example of a suitable operating environment and is not intended to suggest any limitation as to the scope of use or functionality of the operating environment. Example computing devices include, but are not limited to, personal computers, server computers, hand-held or laptop devices, mobile devices (such as mobile phones, mobile consoles, tablets, media players, and the like), multiprocessor systems, consumer electronics, mini computers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like. 
     Although not required, implementations are described in the general context of “computer readable instructions” executed by one or more computing devices. Computer readable instructions may be distributed via computer readable media (discussed below). Computer readable instructions may be implemented as program modules, such as functions, objects, Application Programming Interfaces (APIs), data structures, and the like, that perform particular tasks or implement particular abstract data types. Typically, the functionality of the computer readable instructions may be combined or distributed as desired in various environments. 
       FIG. 12  illustrates an example of a system  900  comprising a computing device  902  configured to implement one or more implementations provided herein. In one configuration, computing device  902  includes at least one processing unit  906  and memory  908 . Depending on the exact configuration and type of computing device, memory  908  may be volatile (such as RAM, for example), non-volatile (such as ROM, flash memory, etc., for example) or some combination of the two. This configuration is illustrated in  FIG. 11  by dashed line  904 . 
     In other implementations, device  902  may include additional features and/or functionality. For example, device  902  may also include additional storage (e.g., removable and/or non-removable) including, but not limited to, magnetic storage, optical storage, and the like. Such additional storage is illustrated in  FIG. 11  by storage  910 . In one implementation, computer readable instructions to implement one or more implementations provided herein may be in storage  910 . Storage  910  may also store other computer readable instructions to implement an operating system, an application program and the like. Computer readable instructions may be loaded in memory  908  for execution by processing unit  906 , for example. 
     The term “computer readable media” as used herein includes computer storage media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions or other data. Memory  908  and storage  910  are examples of computer storage media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVDs) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by device  902 . Any such computer storage media may be part of device  902 . 
     Device  902  may also include communication connection(s)  916  that allows device  902  to communicate with other devices. Communication connection(s)  916  may include, but is not limited to, a modem, a Network Interface Card (NIC), an integrated network interface, a radio frequency transmitter/receiver, an infrared port, a USB connection or other interfaces for connecting computing device  902  to other computing devices. Communication connection(s)  916  may include a wired connection (e.g., data bus) or a wireless connection (e.g., wireless data transmission). Communication connection(s)  916  may transmit and/or receive communication media. 
     The term “computer readable media” may include communication media. Communication media typically embodies computer readable instructions or other data in a “modulated data signal” such as a carrier wave or other transport mechanism and includes any information delivery media. The term “modulated data signal” may include a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. 
     Device  902  may include input device(s)  904  such as keyboard, mouse, pen, voice input device, touch input device, infrared cameras, video input devices, and/or any other input device. Output device(s)  912  such as one or more displays, speakers, printers, and/or any other output device may also be included in device  902 . Input device(s)  914  and output device(s)  912  may be connected to device  902  via a wired connection, wireless connection, or any combination thereof. In one implementation, an input device or an output device from another computing device may be used as input device(s)  914  or output device(s)  912  for computing device  902 . 
     Components of computing device  902  may be connected by various interconnects, such as a bus. Such interconnects may include a Peripheral Component Interconnect (PCI), such as PCI Express, a Universal Serial Bus (USB), firewire (IEEE 1394), an optical bus structure, and the like. In another implementation, components of computing device  902  may be interconnected by a network. For example, memory  908  may be comprised of multiple physical memory units located in different physical locations interconnected by a network. 
     Those skilled in the art will realize that storage devices utilized to store computer readable instructions may be distributed across a network. For example, a computing device  920  accessible via network  918  may store computer readable instructions to implement one or more implementations provided herein. Computing device  902  may access computing device  920  and download a part or all of the computer readable instructions for execution. Alternatively, computing device  902  may download pieces of the computer readable instructions, as needed, or some instructions may be executed at computing device  902  and some at computing device  920 . 
     The word “exemplary” is used herein to mean serving as an example, instance or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete fashion. As used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless specified otherwise, or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. Further, at least one of A and B and/or the like generally means A or B or both A and B. In addition, the articles “a” and “an” as used in this application and the appended claims may generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form. 
     Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims. Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Of course, those skilled in the art will recognize many modifications may be made to this configuration without departing from the scope or spirit of the claimed subject matter. 
     Also, although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. 
     In addition, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application. Furthermore, to the extent that the terms “includes,” “having,” “has,” “with,” or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term “comprising.”