Source: http://www.google.com/patents/US8217918?dq=3657699
Timestamp: 2014-07-14 15:15:45
Document Index: 520192388

Matched Legal Cases: ['Application No. 03791166', 'Application No. 11166405', 'Application No. 03791166', 'Application No. 11166405', 'Application No. 10', 'Application No. 2004', 'Application No. 2004', 'Application No. 03820696', 'Application No. 03820696', 'Application No. 93105103', 'Application No. 03820696', 'Application No. 2004', 'Application No. 2004', 'Application No. 10', 'Application No. 03820696', 'Application No. 03791166', 'Application No. 03791166', 'Application No. 10', 'Application No. 93105103']

Patent US8217918 - Transparent digitiser - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA digitizer for user interaction via an object with an electronically refreshable display screen, the digitizer comprising: a transparent sensing arrangement of detectors located at said electronically refreshable display screen for detecting an electric field of said object, said detectors having outputs,...http://www.google.com/patents/US8217918?utm_source=gb-gplus-sharePatent US8217918 - Transparent digitiserAdvanced Patent SearchPublication numberUS8217918 B2Publication typeGrantApplication numberUS 11/905,593Publication dateJul 10, 2012Filing dateOct 2, 2007Priority dateAug 29, 2002Also published asCN1679078A, CN100440309C, EP1550105A2, EP1550105A4, EP1550105B1, EP2388770A1, US7292229, US20040095333, US20080023232, WO2004021328A2, WO2004021328A3Publication number11905593, 905593, US 8217918 B2, US 8217918B2, US-B2-8217918, US8217918 B2, US8217918B2InventorsMeir Morag, Haim PerskiOriginal AssigneeN-Trig Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (53), Non-Patent Citations (32), Referenced by (8), Classifications (17), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetTransparent digitiserUS 8217918 B2Abstract A digitizer for user interaction via an object with an electronically refreshable display screen, the digitizer comprising: a transparent sensing arrangement of detectors located at said electronically refreshable display screen for detecting an electric field of said object, said detectors having outputs, and an arrangement of differential amplifiers associated with said outputs, thereby to apply differential detection between said outputs.
U.S. patent application Ser. No. 09/628,334 �Physical Object Location Apparatus and Method and a Platform using the same� to Gamalong Ltd, the contents of which are hereby incorporated by reference, describes an electromagnetic method for locating physical objects on a flat screen display, that is to say a digitizer that can be incorporated into the active display screen of an electronic device. The present disclosure concerns further technical methods for implementing a transparent sensor based digitizer.
General Reference is now made to FIG. 1, which is a simplified block diagram of a first preferred embodiment of the present invention. A digitizer arrangement is applied to a display screen host arrangement 10. The digitizer arrangement comprises a grid-based sensor 12, which is preferably transparent, and which is located on top of an FPD 14. Analog front-end ASICs 16 are preferably mounted on the frame of the sensor. The ASICS are preferably connected to outputs of the various conductors in the grid as will be explained in greater detail hereinbelow. Each front-end receives very low amplitude signals as output by the sensor conductors. It will be recalled that the sensor conductors, being transparent, have relatively high resistivity, limiting the amplitude of output signals. The ASIC 16 comprises circuitry to amplify the signal, identify and filter out irrelevant frequencies, sample the output into a digital representation and forward the sampled data to a data bus 18 for further digital processing at digital processing unit 20. Digital processing unit 20 is responsible for running various digital processing algorithms, as will be discussed in greater detail hereinbelow. The outcome of the digital processing performed by unit 20 is preferably the position of one or more physical objects, typically the position of the stylus, and the outcome, once determined, is forwarded to host 22 via interface 24 for processing by the operating system or any current application. In a preferred embodiment the digital unit communicates with the host via a simple serial interface. Additional interfaces, such as USB, are possible.
Sensor Reference is now made to FIG. 3, which is a simplified diagram illustrating a preferred embodiment of the sensor arrangement. As explained above, the sensor arrangement in one preferred embodiment comprises a grid 12 of conductive lines. The grid preferably comprises conductive polymers patterned on a polyester thermoplastic (PET) foil 40. The grid preferably comprises two separate layers 42 and 44, electrically separated from each other by the PET layer 40. One of the layers 42 contains a set of parallel conductors arranged in one direction. The other layer 44 contains a set of parallel conductors orthogonal to those of the first layer.
Front End Reference is now made to FIG. 5, which is a simplified block diagram showing the internal configuration of the front-end unit 16 of FIG. 1 according to a preferred embodiment of the present invention. The front end unit 16 comprises a series of differential amplifiers 60.1 . . . 60.n. The differential amplifiers are connected in groups to switches 62.1 . . . 62.m. The switches pass on signals from one of the connected amplifiers to the next stage. The switches are in turn connected to filter and amplifier circuits 64.1 . . . 64.m, and A/D converters 66.1 . . . 66.m. The A/D converters are connected to an output buffer 68, which produces a final output signal for the digital processing unit.
Digital Unit Reference is now made to FIG. 8, which is a simplified block diagram of the internal structure of a preferred embodiment of the digital processing unit 20 of FIG. 1. A front-end interface 80 receives serial inputs of sampled signals from the various front-end units 16 and arranges the inputs into a parallel representation. The parallel representation is transferred to DSP 82, which reads the sampled data, processes the data and determines or calculates the position of the physical objects such as the stylus. The calculated position is then sent to the host computer via link, preferably a serial link 84. Code for operating the DSP 84 is preferably stored in Flash memory 86 and sampled data is stored in RAM 88. Excitation pulses for sending to the excitation coil are produced by the DSP 84, and then transformed into analog signals and amplified by unit 90 for output.
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No. 10/649,708.24Response Dated Jun. 21, 2010 to Notification of the Reasons for Rejection of Mar. 29, 2010 From the Korean Intellectual Property Office Re.: Application No. 10-2005-7003531.25Response Dated Jun. 7, 2007 to Official Action of May 31, 2007 From the US Patent and Trademark Office Re.: U.S. Appl. No. 10/649,708.26Response Dated May 4, 2008 to Office Action of Mar. 14, 2008 From the Patent Office of the People's Republic of China Re.: Application No. 03820696.X.27Response Dated May 8, 2007 to Final Official Action of Feb. 8, 2007 From the US Patent and Trademark Office Re.: U.S. Appl. No. 10/649,708.28Response Dated Nov. 22, 2006 to Official Action of Aug. 23, 2006 From the US Patent and Trademark Office Re.: U.S. Appl. No. 10/649,708.29Response Dated Sep. 21, 2010 to Communication Pursuant to Article 94(3) EPC of May 31, 2010 From the European Patent Office Re. Application No. 03791166.6.30Supplementary European Search Report Dated Nov. 24, 2009 From the European Patent Office Re.: Application No. 03791166.6.31Translation of Notification of the Reasons for Rejection Dated Mar. 29, 2010 From the Korean Intellectual Property Office Re.: Application No. 10-2005-7003531.32Translation to Official Letter Dated Jan. 13, 2005 from The Intellectual Property Bureau Ministry of Economic Affairs of Taiwan Re.: Application No. 93105103.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8473243Sep 23, 2011Jun 25, 2013Egalax�Empia Technology Inc.Method and device for analyzing positionsUS8583401Sep 23, 2011Nov 12, 2013Egalax�Empia Technology Inc.Method and device for analyzing positionsUS8600698Oct 8, 2010Dec 3, 2013Egalax�Empia Technology Inc.Method and device for analyzing positionsUS8643613Oct 8, 2010Feb 4, 2014Egalax�Empia Technology Inc.Method and device for dual-differential sensingUS20120075224 *Nov 30, 2011Mar 29, 2012Egalax_Empia Technology Inc.Method and device for dual-differential sensingUS20120154340 *Dec 21, 2010Jun 21, 2012Sandeep VuppuActive Stylus for Use with Touch-Sensitive Interfaces and Corresponding MethodUS20120271971 *Apr 17, 2012Oct 25, 2012Kye Systems Corp.Non-contact sensing device and its method for computer peripheralsEP2703970A1 *Aug 29, 2013Mar 5, 2014Samsung Electronics Co., LtdApparatus and method for processing input on touch screen* Cited by examinerClassifications U.S. Classification345/179, 178/19.03, 178/18.07, 345/173International ClassificationG06F3/033, G09G5/00, G06K11/06, G06F3/046, G06F3/041Cooperative ClassificationG06F3/03545, G06F3/0412, G06F3/046, G06F3/0418European ClassificationG06F3/041T2, G06F3/041D, G06F3/046, G06F3/0354NLegal EventsDateCodeEventDescriptionJul 28, 2011ASAssignmentFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:TAMARES HOLDINGS SWEDEN AB;REEL/FRAME:026666/0288Effective date: 20110706Owner name: N-TRIG LTD., ISRAELDec 20, 2010ASAssignmentOwner name: TAMARES HOLDINGS SWEDEN AB, SWEDENFree format text: SECURITY AGREEMENT;ASSIGNOR:N-TRIG, INC.;REEL/FRAME:025505/0288Effective date: 20101215Jan 6, 2010ASAssignmentOwner name: N-TRIG LTD., ISRAELFree format text: RELEASE BY SECURED PARTY;ASSIGNORS:PLENUS II, LIMITED PARTNERSHIP;PLENUS II, (D.C.M.), LIMITED PARTNERSHIP;PLENUS III, LIMITED PARTNERSHIP;AND OTHERS;REEL/FRAME:023741/0043Effective date: 20091230Feb 25, 2008ASAssignmentOwner name: PLENUS II, (D.C.M.), LIMITED PARTNERSHIP, ISRAELOwner name: PLENUS II, LIMITED PARTNERSHIP, ISRAELOwner name: PLENUS III (2), LIMITED PARTNERSHIP, ISRAELOwner name: PLENUS III (C.I.), L.P., ISRAELOwner name: PLENUS III (D.C.M.), LIMITED PARTNERSHIP, ISRAELOwner name: PLENUS III, LIMITED PARTNERSHIP, ISRAELFree format text: SECURITY AGREEMENT;ASSIGNOR:N-TRIG LTD.;REEL/FRAME:020550/0956Effective date: 20080110Jan 8, 2008ASAssignmentOwner name: N-TRIG LTD., ISRAELFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MORAG, MEIR;PERSKI, HAIM;REEL/FRAME:020328/0514Effective date: 20070926RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google