WO2000057344A1 - Contactless smart card reader - Google Patents
Contactless smart card reader Download PDFInfo
- Publication number
- WO2000057344A1 WO2000057344A1 PCT/GB2000/001064 GB0001064W WO0057344A1 WO 2000057344 A1 WO2000057344 A1 WO 2000057344A1 GB 0001064 W GB0001064 W GB 0001064W WO 0057344 A1 WO0057344 A1 WO 0057344A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- smart card
- antenna
- contactless smart
- display screen
- reader
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
Definitions
- This invention relates to a contactless smart card reader and in particular to such a unit arranged to read a smart card adjacent a display screen.
- this invention relates to a smart card communication system employing such a reader.
- Contactless smart cards are portable devices containing an antenna and circuitry connected to the antenna, generally in the form of an integrated circuit physically embedded within the device.
- smart cards are conveniently formed in the same size as other forms of credit card or swipe card but the term smart card is used generically to cover similar devices which may have a different size or shape including antenna's and integrated circuits embedded into other items such as keys or watches.
- contactless smart cards In general contactless smart cards have no on board power supply and store information in a non-volatile memory on an embedded chip.
- a contactless smart card read/write unit including an antenna which transmits an RF (radio frequency) electromagnetic field is used to communicate with the contactless smart card.
- RF radio frequency
- Power management circuits on board the smart card convert this into power to operate the embedded chips or other circuitry on the smart card.
- Data can then be transmitted from the read write unit to the smart card by modulation of the transmitted RF field. Further, data can be transmitted back from the smart card to the read/write unit by circuitry within the smart card modulating the RF field. The read/write unit then detects these changes in the RF field to read the data being sent by the smart card.
- the chief advantage of the contactless smart card is the absence of any requirement for electrical contact between the smart card and the read/write unit. This allows both the smart card and the read/write unit to be completely sealed against environmental damage and eliminates any risk of damage to or short circuiting between physical contacts.
- difficulties have been encountered with smart cards with ensuring that smart cards are placed close enough to the antenna of a read/write unit to allow reliable data transfer during operation.
- a communication link between a smart card and a read/write unit can be sustained over distances of several meters, in practice the requirement for an RF field to power the smart card and allow two way data transfer imposes limitations, due primarily to the strength of RF field required.
- each read/write unit communicates only with a smart card which it is intended to communicate with and is not interfered with by another smart card, and vice versa, and this is generally best achieved by minimising the strength of the emitted RF field.
- the present invention was made in an attempt to increase the reliability of contactless smart card communication and overcome the above problems.
- this invention provides a contactless smart card reader comprising a visual display unit (NDU) incorporating a display screen and a smart card power and reading antenna arranged to allow power to be supplied to and data to be read from a contactless smart card located adjacent to the display screen.
- NDU visual display unit
- this invention provides a contactless smart card communication system comprising a contactless smart card reader as set out above and a contactless smart card.
- this invention provides a method of operating a contactless smart card reader as set out above in which the display screen displays a target region of screen over which the contactless smart card should be placed.
- the contactless smart card reader, communication system or method or operating thereof allows instructions to be given to the user regarding the need to place, retain or replace the contactless smart card adjacent a location on the display screen to ensure correct and timely location of the contactless smart card relative to the reader and so allow a reliable communications link to be maintained.
- a contactless smart card reader employing the invention will now be described, by way of example only, with reference to the accompanying diagrammatic figures, in which:
- Figure 1 shows a contactless smart card reader and cooperating contactless smart card
- Figure 2 shows a display shown by the system of figure 1.
- FIG 1 the operation of a smart card read/write unit according to the invention is shown.
- a visual display unit (NDU) screen 1 displays data provided by a display device 2 which may be a dedicated display processor or a general purpose computer such as a PC.
- An antenna 3 is formed behind the screen 1 and is driven by read/write electronics 4.
- the read/write electronics 4 supply an RF signal to the antenna 3 to generate an RF field which is transmitted through the NDU screen 1.
- a contactless smart card 5 for use with the read/write unit includes a tuned antenna 6 tuned to the frequency of the RF field emitted from the antenna 3.
- the tuned antenna 6 is connected to a power regulator 7, data modulator 8 and a processor 9 all sealed within the smart card 5.
- the power regulator 7 converts the oscillating induced currents in the tuned antenna 6 into a DC power supply which is used to power the processor 9 and other electronic components, such as a memory, on the smart card 5.
- a memory such as a memory
- data held in a non-volatile memory such as an eeprom or flash memory is placed in a suitable form for transmission by the processor 9 and then passed to the data modulator 8.
- the data modulator 8 alters the impedance of the tuned antenna 6 to modulate the RF field strength re-received by the antenna 3 according to the read data.
- the read/write electronics 4 detects this modulated change in the RF field strength at the antenna 3 and processes this to obtain the read data.
- the read data is then transferred to a data processing unit 10 for processing.
- data is sent from the data processing unit 10 to the read/write electronics 4.
- the read/write electronics 4 modulate the signal supplied to the antenna 3 to modulate the RF field.
- the modulated RF field is received by the tuned antenna 6 and modulates the oscillating currents generated within the tuned antenna 6.
- the modulated currents are detected by the data modulator/demodulator 8 and supplied to the processor 9.
- the processor 9 then operates according to the data received, which can be data to be placed in the non-volatile memory, program instructions to be followed by the processor, encryption information or any other desired data.
- the data processing unit 10 In addition to supplying data to the read/write electronics 4 for transmission to the smart card 5, the data processing unit 10 also supplies information to the display data generator 2 to control the data shown on the display screen 1. This allows messages to be displayed on the screen 1 relating to use of the smart card 5. For example, the region overlying the antenna 3 can be indicated as the location over which the smart card 5 should be placed. Further, if a user is attempting to carry out an activity requiring the reading of data from the smart card and such data reading from the smart card 5 cannot be carried out a message can be displayed on the screen 1 requesting that the smart card 5 be placed in close proximity to or against the screen 1 at the location overlying the antenna 3.
- the screen 1 can display a message instructing the user to replace the smart card 5 close to or against the screen 1 in the indicated region over the antenna 3.
- the antenna 3 is shown as being located behind and in the centre of the display screen.
- NDU visual display unit
- One possibility with any type of NDU is to form the antenna by thin wires secured or printed on the front face of the display or, more securely, where there are multiple layers to the display on a surface not exposed to physical contact by a user.
- the antenna can be formed by wires embedded within a screen surface.
- the antenna can be formed by wires located around the periphery of the screen.
- LCD liquid crystal displays
- TFT thin film transistor
- LED light emitting diode array
- CRT cathode ray tube
- the antenna can be mounted behind the screen to operate through it. This can conveniently be carried out by integrating the antenna into a PCB of the read/write electronics 4 or the driver electronics for the display 1 located behind the screen.
- the use of an antenna mounted behind the display screen and operating through it will not normally be convenient in a cathode ray tube display due to the physical size and depth of the CRT screen and the conductive layers within a CRT display, which will tend to block the RF field.
- the antenna can conveniently be formed as a part of this conductive layer.
- smart cards usually use frequencies in the range 100 to 150 Khz (designated as low frequency) or 13.56 Mhz (designated high frequency).
- the operating frequency for the RF driving and data carrying field of the contactless smart card 5 will generally be orders of magnitude different from the refresh rate, and thus control signal frequency, of the display screen 1.
- the main requirement is that it is possible to project the RF driving field from the antenna 3 through the display screen 1 if the antenna 3 is to be placed behind the display screen 1. If this is a problem, for example in a CRT display, the use of an antenna surrounding the display screen or formed in or on a front face of a display screen may be necessary.
- the antenna 5 operates independently from the screen 1 so that the antenna can power and read a contactless smart card even when the screen is switched off. This allows the screen to be powered up from a stand by condition when the presence of contactless smart card is detected.
- a touch sensitive LCD display screen for carrying out ATM operations (automatic bank teller operations) is shown.
- the display screen 11 has a contactless smart card power/read/write antenna 12 located behind the centre of the screen 11 and a touch sensitive region of the screen 11a is located directly over the antenna 12.
- the number of touch sensitive regions provided can of course be varied as desired.
- the user can then input the pin number using the contact sensitive areas 1 lb to I lk and the pin number can be compared with data carried on or derived from the smart card to authorise proceeding with the transaction in any one of the ways already known for use in ATM systems.
- the screen 11 displays the message "invalid card type?" or "card unreadable” as appropriate.
- the ATM operation it may be necessary to write data to the smart card, for example identifying the number of incorrect pin number entries made, providing updating information to maintain encryption security or changing data held on the card regarding available credit. If this data writing cannot be carried out because of loss of the communication to the smart card, a message requesting the user to replace the card in the central region of the screen 11 overlying the antenna 12 can be re-shown together with the target outline and arrows. If the smart card is not then detected the transaction is aborted and a message to this effect displayed. However, if after requesting that the user replace the smart card no smart card is detected but there is contact with the central contact sensitive region 11a of the screen 11 the operation is aborted and a message indicating a possible card fault is displayed. It will be understood that the data transfer between the smart card and the ATM machine card reader may be encrypted for security.
- a contact sensitive display having the antenna located behind and within the display is regarded as a particularly advantageous combination because it allows for communication between the smart card and the read/write unit, manual input of pin number or other data and display of operating instructions or other data to the user with the minimum physical size and a minimum number of parts exposed to the outside environment and possible vandalism.
- the display screen incorporating an antenna and having an associated key pad or buttons in addition to or instead or touch sensitive regions of the screen could be used to input user data.
- Typical smart card applications in which the invention can be used include, but are not limited to, gaming machines, pre-payment service or utility provision, historical data storage, point of sale transactions, loyalty schemes, authorisation and access schemes (for example pay per view television), manufacturing machine control, personal computer access and remote computer access over the Internet.
- the region within which the smart card can sustain communications with the read/write unit will extend several tens of centimetres from the display screen so that even when the user places the smart card against the central region of the screen and then removes it immediately there will be sufficient time for communication with card as it approaches and moves away from the screen for the necessary data reading and writing operations to be carried out.
- the region within which the smart card can sustain communications with the read/write unit will extend several tens of centimetres from the display screen so that even when the user places the smart card against the central region of the screen and then removes it immediately there will be sufficient time for communication with card as it approaches and moves away from the screen for the necessary data reading and writing operations to be carried out.
- the screen could initially display a message requesting that the card be placed in a target region overlying the antenna and then display messages requesting that the card be held in place and then indicating that the card can be removed.
- the message displayed when the ATM system shown in Figure 2 is on standby could be displayed by operating the screen 11.
- the message could be permanently displayed by being printed on the face of the screen 11 and the screen 11 powered down when the system is on standby.
- the screen 11 could then be powered up when the antenna 12 detects the presence of a contactless smart card.
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Credit Cards Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000607148A JP2002540512A (en) | 1999-03-22 | 2000-03-21 | Contactless smart card reader |
AU33109/00A AU3310900A (en) | 1999-03-22 | 2000-03-21 | Contactless smart card reader |
EP00911116A EP1161738A1 (en) | 1999-03-22 | 2000-03-21 | Contactless smart card reader |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9906567.4 | 1999-03-22 | ||
GB9906567A GB2350461B (en) | 1999-03-22 | 1999-03-22 | Contactless smart card reader |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000057344A1 true WO2000057344A1 (en) | 2000-09-28 |
Family
ID=10850126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/001064 WO2000057344A1 (en) | 1999-03-22 | 2000-03-21 | Contactless smart card reader |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1161738A1 (en) |
JP (1) | JP2002540512A (en) |
AU (1) | AU3310900A (en) |
GB (1) | GB2350461B (en) |
WO (1) | WO2000057344A1 (en) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002047023A1 (en) * | 2000-12-05 | 2002-06-13 | Vfj Technology Pty Limited | A smart token and reader device |
US6994250B2 (en) | 2001-07-16 | 2006-02-07 | Moosa Eisa Al Amri | Boarding passes with encoded data and systems for issuing and processing them |
US7014120B2 (en) | 2001-10-02 | 2006-03-21 | Moosa Eisa Al Amri | Smart documents |
CN100421087C (en) * | 2005-12-20 | 2008-09-24 | 上海华虹集成电路有限责任公司 | Method for reading and writing non-contact intelligent card data |
EP2244232A3 (en) * | 2009-04-23 | 2011-09-14 | Siemens Aktiengesellschaft | Data processing device with a display screen and authentication device |
US8970537B1 (en) | 2013-09-30 | 2015-03-03 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US9081457B2 (en) | 2013-10-30 | 2015-07-14 | Synaptics Incorporated | Single-layer muti-touch capacitive imaging sensor |
US9081453B2 (en) | 2012-01-12 | 2015-07-14 | Synaptics Incorporated | Single layer capacitive imaging sensors |
US9274662B2 (en) | 2013-10-18 | 2016-03-01 | Synaptics Incorporated | Sensor matrix pad for performing multiple capacitive sensing techniques |
US9298325B2 (en) | 2013-09-30 | 2016-03-29 | Synaptics Incorporated | Processing system for a capacitive sensing device |
US9459367B2 (en) | 2013-10-02 | 2016-10-04 | Synaptics Incorporated | Capacitive sensor driving technique that enables hybrid sensing or equalization |
US9495046B2 (en) | 2013-10-23 | 2016-11-15 | Synaptics Incorporated | Parasitic capacitance filter for single-layer capacitive imaging sensors |
US9542023B2 (en) | 2013-08-07 | 2017-01-10 | Synaptics Incorporated | Capacitive sensing using matrix electrodes driven by routing traces disposed in a source line layer |
US9690397B2 (en) | 2014-05-20 | 2017-06-27 | Synaptics Incorporated | System and method for detecting an active pen with a matrix sensor |
US9715304B2 (en) | 2015-06-30 | 2017-07-25 | Synaptics Incorporated | Regular via pattern for sensor-based input device |
US9720541B2 (en) | 2015-06-30 | 2017-08-01 | Synaptics Incorporated | Arrangement of sensor pads and display driver pads for input device |
US9778713B2 (en) | 2015-01-05 | 2017-10-03 | Synaptics Incorporated | Modulating a reference voltage to preform capacitive sensing |
US9798429B2 (en) | 2014-02-28 | 2017-10-24 | Synaptics Incorporated | Guard electrodes in a sensing stack |
US9927832B2 (en) | 2014-04-25 | 2018-03-27 | Synaptics Incorporated | Input device having a reduced border region |
US9939972B2 (en) | 2015-04-06 | 2018-04-10 | Synaptics Incorporated | Matrix sensor with via routing |
US10037112B2 (en) | 2015-09-30 | 2018-07-31 | Synaptics Incorporated | Sensing an active device'S transmission using timing interleaved with display updates |
US10042489B2 (en) | 2013-09-30 | 2018-08-07 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US10067587B2 (en) | 2015-12-29 | 2018-09-04 | Synaptics Incorporated | Routing conductors in an integrated display device and sensing device |
US10095948B2 (en) | 2015-06-30 | 2018-10-09 | Synaptics Incorporated | Modulation scheme for fingerprint sensing |
US10126890B2 (en) | 2015-12-31 | 2018-11-13 | Synaptics Incorporated | Single layer sensor pattern and sensing method |
US10133421B2 (en) | 2014-04-02 | 2018-11-20 | Synaptics Incorporated | Display stackups for matrix sensor |
US10175827B2 (en) | 2014-12-23 | 2019-01-08 | Synaptics Incorporated | Detecting an active pen using a capacitive sensing device |
US10488994B2 (en) | 2015-09-07 | 2019-11-26 | Synaptics Incorporated | Single layer capacitive sensor pattern |
WO2021040417A1 (en) * | 2019-08-27 | 2021-03-04 | Samsung Electronics Co., Ltd. | Display apparatus and method of controlling the same |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9903991D0 (en) * | 1999-02-23 | 1999-04-14 | Displaze Limited | Card-reading |
JP2005084704A (en) * | 2003-09-04 | 2005-03-31 | Matsushita Electric Ind Co Ltd | Contactless card reading means, and seat having contactless card reading function |
US8629650B2 (en) | 2008-05-13 | 2014-01-14 | Qualcomm Incorporated | Wireless power transfer using multiple transmit antennas |
US9740342B2 (en) | 2011-12-23 | 2017-08-22 | Cirque Corporation | Method for preventing interference of contactless card reader and touch functions when they are physically and logically bound together for improved authentication security |
GB2523015B (en) * | 2012-10-26 | 2017-08-30 | Murata Manufacturing Co | Interface, communication apparatus, and program |
US9262651B2 (en) | 2013-01-08 | 2016-02-16 | Cirque Corporation | Method for preventing unintended contactless interaction when performing contact interaction |
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GB2252188A (en) * | 1991-01-22 | 1992-07-29 | Herbert & Sons Ltd | Retail product identification system |
DE4205615A1 (en) * | 1992-02-24 | 1993-08-26 | Provera Ges Fuer Projektierung | Secret PIN number input into electronic system - has card inserted into input carrier that provides storage of number for un-observed reading |
GB2291726A (en) * | 1991-07-17 | 1996-01-31 | John Wolfgang Halpern | Card reader |
EP0810540A2 (en) * | 1996-05-30 | 1997-12-03 | Motorola, Inc. | Contactless identification system |
EP0919945A2 (en) * | 1997-11-28 | 1999-06-02 | Matsushita Electric Industrial Co., Ltd | Card Reader |
EP0977159A1 (en) * | 1998-07-27 | 2000-02-02 | Hitachi Computer Products (Europe) S.A. | Electronic terminal apparatus |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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GB9903991D0 (en) * | 1999-02-23 | 1999-04-14 | Displaze Limited | Card-reading |
-
1999
- 1999-03-22 GB GB9906567A patent/GB2350461B/en not_active Expired - Fee Related
-
2000
- 2000-03-21 JP JP2000607148A patent/JP2002540512A/en active Pending
- 2000-03-21 EP EP00911116A patent/EP1161738A1/en not_active Withdrawn
- 2000-03-21 WO PCT/GB2000/001064 patent/WO2000057344A1/en not_active Application Discontinuation
- 2000-03-21 AU AU33109/00A patent/AU3310900A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2252188A (en) * | 1991-01-22 | 1992-07-29 | Herbert & Sons Ltd | Retail product identification system |
GB2291726A (en) * | 1991-07-17 | 1996-01-31 | John Wolfgang Halpern | Card reader |
DE4205615A1 (en) * | 1992-02-24 | 1993-08-26 | Provera Ges Fuer Projektierung | Secret PIN number input into electronic system - has card inserted into input carrier that provides storage of number for un-observed reading |
EP0810540A2 (en) * | 1996-05-30 | 1997-12-03 | Motorola, Inc. | Contactless identification system |
EP0919945A2 (en) * | 1997-11-28 | 1999-06-02 | Matsushita Electric Industrial Co., Ltd | Card Reader |
EP0977159A1 (en) * | 1998-07-27 | 2000-02-02 | Hitachi Computer Products (Europe) S.A. | Electronic terminal apparatus |
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002047023A1 (en) * | 2000-12-05 | 2002-06-13 | Vfj Technology Pty Limited | A smart token and reader device |
US6994250B2 (en) | 2001-07-16 | 2006-02-07 | Moosa Eisa Al Amri | Boarding passes with encoded data and systems for issuing and processing them |
US7014120B2 (en) | 2001-10-02 | 2006-03-21 | Moosa Eisa Al Amri | Smart documents |
CN100421087C (en) * | 2005-12-20 | 2008-09-24 | 上海华虹集成电路有限责任公司 | Method for reading and writing non-contact intelligent card data |
EP2244232A3 (en) * | 2009-04-23 | 2011-09-14 | Siemens Aktiengesellschaft | Data processing device with a display screen and authentication device |
US9182861B2 (en) | 2012-01-12 | 2015-11-10 | Synaptics Incoporated | Single layer capacitive imaging sensors |
US9081453B2 (en) | 2012-01-12 | 2015-07-14 | Synaptics Incorporated | Single layer capacitive imaging sensors |
US9817533B2 (en) | 2012-01-12 | 2017-11-14 | Synaptics Incorporated | Single layer capacitive imaging sensors |
US9542023B2 (en) | 2013-08-07 | 2017-01-10 | Synaptics Incorporated | Capacitive sensing using matrix electrodes driven by routing traces disposed in a source line layer |
US9552089B2 (en) | 2013-08-07 | 2017-01-24 | Synaptics Incorporated | Capacitive sensing using a matrix electrode pattern |
US10042489B2 (en) | 2013-09-30 | 2018-08-07 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US10088951B2 (en) | 2013-09-30 | 2018-10-02 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US9298325B2 (en) | 2013-09-30 | 2016-03-29 | Synaptics Incorporated | Processing system for a capacitive sensing device |
US9760212B2 (en) | 2013-09-30 | 2017-09-12 | Synaptics Incorported | Matrix sensor for image touch sensing |
US9778790B2 (en) | 2013-09-30 | 2017-10-03 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US8970537B1 (en) | 2013-09-30 | 2015-03-03 | Synaptics Incorporated | Matrix sensor for image touch sensing |
US9459367B2 (en) | 2013-10-02 | 2016-10-04 | Synaptics Incorporated | Capacitive sensor driving technique that enables hybrid sensing or equalization |
US9274662B2 (en) | 2013-10-18 | 2016-03-01 | Synaptics Incorporated | Sensor matrix pad for performing multiple capacitive sensing techniques |
US9495046B2 (en) | 2013-10-23 | 2016-11-15 | Synaptics Incorporated | Parasitic capacitance filter for single-layer capacitive imaging sensors |
US9483151B2 (en) | 2013-10-30 | 2016-11-01 | Synaptics Incorporated | Single layer multi-touch capacitive imaging sensor |
US9081457B2 (en) | 2013-10-30 | 2015-07-14 | Synaptics Incorporated | Single-layer muti-touch capacitive imaging sensor |
US9798429B2 (en) | 2014-02-28 | 2017-10-24 | Synaptics Incorporated | Guard electrodes in a sensing stack |
US10133421B2 (en) | 2014-04-02 | 2018-11-20 | Synaptics Incorporated | Display stackups for matrix sensor |
US9927832B2 (en) | 2014-04-25 | 2018-03-27 | Synaptics Incorporated | Input device having a reduced border region |
US9690397B2 (en) | 2014-05-20 | 2017-06-27 | Synaptics Incorporated | System and method for detecting an active pen with a matrix sensor |
US10175827B2 (en) | 2014-12-23 | 2019-01-08 | Synaptics Incorporated | Detecting an active pen using a capacitive sensing device |
US9778713B2 (en) | 2015-01-05 | 2017-10-03 | Synaptics Incorporated | Modulating a reference voltage to preform capacitive sensing |
US10795471B2 (en) | 2015-01-05 | 2020-10-06 | Synaptics Incorporated | Modulating a reference voltage to perform capacitive sensing |
US11693462B2 (en) | 2015-01-05 | 2023-07-04 | Synaptics Incorporated | Central receiver for performing capacitive sensing |
US10990148B2 (en) | 2015-01-05 | 2021-04-27 | Synaptics Incorporated | Central receiver for performing capacitive sensing |
US9939972B2 (en) | 2015-04-06 | 2018-04-10 | Synaptics Incorporated | Matrix sensor with via routing |
US9715304B2 (en) | 2015-06-30 | 2017-07-25 | Synaptics Incorporated | Regular via pattern for sensor-based input device |
US9720541B2 (en) | 2015-06-30 | 2017-08-01 | Synaptics Incorporated | Arrangement of sensor pads and display driver pads for input device |
US10095948B2 (en) | 2015-06-30 | 2018-10-09 | Synaptics Incorporated | Modulation scheme for fingerprint sensing |
US10488994B2 (en) | 2015-09-07 | 2019-11-26 | Synaptics Incorporated | Single layer capacitive sensor pattern |
US10037112B2 (en) | 2015-09-30 | 2018-07-31 | Synaptics Incorporated | Sensing an active device'S transmission using timing interleaved with display updates |
US10067587B2 (en) | 2015-12-29 | 2018-09-04 | Synaptics Incorporated | Routing conductors in an integrated display device and sensing device |
US10126890B2 (en) | 2015-12-31 | 2018-11-13 | Synaptics Incorporated | Single layer sensor pattern and sensing method |
US11093058B2 (en) | 2015-12-31 | 2021-08-17 | Synaptics Incorporated | Single layer sensor pattern and sensing method |
WO2021040417A1 (en) * | 2019-08-27 | 2021-03-04 | Samsung Electronics Co., Ltd. | Display apparatus and method of controlling the same |
US11272343B2 (en) | 2019-08-27 | 2022-03-08 | Samsung Electronics Co., Ltd. | Display apparatus and method of controlling the same |
Also Published As
Publication number | Publication date |
---|---|
EP1161738A1 (en) | 2001-12-12 |
GB9906567D0 (en) | 1999-05-19 |
GB2350461B (en) | 2003-12-31 |
GB2350461A (en) | 2000-11-29 |
JP2002540512A (en) | 2002-11-26 |
AU3310900A (en) | 2000-10-09 |
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