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1. WO2012138393 - STIMULUS SIGNAL FOR A CAPACITIVE SENSE ARRAY

Publication Number WO/2012/138393
Publication Date 11.10.2012
International Application No. PCT/US2011/066587
International Filing Date 21.12.2011
IPC
G01R 27/26 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants
CPC
G06F 3/0416
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
0416Control or interface arrangements specially adapted for digitisers
G06F 3/04166
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
0416Control or interface arrangements specially adapted for digitisers
04166Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
G06F 3/044
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
044by capacitive means
G06F 3/0446
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
044by capacitive means
0446using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
Applicants
  • CYPRESS SEMICONDUCTOR CORPORATION [US]/[US] (AllExceptUS)
  • HANS, Klein [DE]/[CA] (UsOnly)
  • GALLAGHER, Kevin [IE]/[IE] (UsOnly)
  • O'KEEFE, Daniel [IE]/[IE] (UsOnly)
  • ELLIS, Denis [IE]/[IE] (UsOnly)
  • BYRKETT, Bruce [US]/[US] (UsOnly)
Inventors
  • HANS, Klein
  • GALLAGHER, Kevin
  • O'KEEFE, Daniel
  • ELLIS, Denis
  • BYRKETT, Bruce
Agents
  • GRANGE, Kevin, O.
Priority Data
13/277,65420.10.2011US
61/472,15205.04.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) STIMULUS SIGNAL FOR A CAPACITIVE SENSE ARRAY
(FR) SIGNAL DE STIMULUS POUR RÉSEAU À DÉTECTION CAPACITIVE
Abstract
(EN)
A circuit for generating a voltage is disclosed. The voltage has an amplitude greater than an available power supply. The circuit includes a driver to supply the voltage on an output terminal to an electrode of a touch sense array. The circuit also includes a charge pump array coupled to the driver. The charge pump array includes an array of charge pumps to supply an input voltage to the driver. The circuit also includes a feedback circuit coupled to the charge pump array. The feedback circuit is configured to measure the input voltage and to select different combinations of the array of charge pumps to maintain the voltage on the output terminal.
(FR)
La présente invention concerne un circuit servant à générer une tension. La tension présente une amplitude supérieure à celle à d'une alimentation électrique disponible. Le circuit comprend un circuit d'attaque servant à fournir la tension sur une borne de sortie vers une électrode d'un réseau à détection sensitive. Le circuit comprend également un réseau de pompes de charges connecté au circuit d'attaque. Le réseau de pompes de charges sert à fournir une tension d'entrée au circuit d'attaque. Le circuit comprend également un circuit de rétroaction connecté au réseau de pompes de charges. Le circuit de rétroaction est conçu pour mesurer la tension d'entrée et pour sélectionner différentes combinaisons du réseau de pompes de charges afin de maintenir la tension sur la borne de sortie.
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