Patents by Inventor Harald Philipp

Harald Philipp has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7830160
    Abstract: A capacitive touch sensor is provided having sensing path for setting a color parameter to a desired value within a range, the color parameter being color hue, color saturation or color temperature. The sensor includes a sensing element having a sensing path, a terminal connecting the sensing element to a sensing channel, and a processor configured to interpret a signal indicative of a capacitance of the terminal. The processor has a first mode configured to set a parameter to a desired value. The desired value is related to a first position of an object sensed along the sensing path and a range of parameter values mapped to a length of the sensing path. A second mode adjusts the parameter based on a displacement of the object along the sensing path.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: November 9, 2010
    Assignee: Atmel, Corporation
    Inventor: Harald Philipp
  • Patent number: 7825905
    Abstract: A touch sensitive position sensor for detecting the position of an object in two dimensions is described. The position sensor has first and second resistive bus-bars spaced apart with an anisotropic conductive area between them. Electric currents induced in the anisotropic conductive area by touch or proximity flow preferentially towards the bus-bars to be sensed by detection circuitry. Because induced currents, for example those induced by drive circuitry, flow preferentially along one direction, pin-cushion distortions in position estimates are largely constrained to this single direction. Such one-dimensional distortions can be corrected for very simply by applying scalar correction factors, thereby avoiding the need for complicated vector correction.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: November 2, 2010
    Assignee: Atmel Corporation
    Inventor: Harald Philipp
  • Publication number: 20100271330
    Abstract: A capacitive two-dimensional (2D) touch panel has three sets of interleaved electrodes. A first set of electrodes is spaced apart along the y-direction and these are galvanically connected to each other by a resistive strip connected at either end to a connection line. A second set of electrodes is also arrayed along the y-direction and these are galvanically connected to each other via a notionally non-resistive first connection. A third set of electrodes is also arrayed along the y-direction and these are galvanically connected to each other via a notionally non-resistive second connection. The second and third sets of electrodes are interleaved without galvanic cross-conduction to provide a gradient along the x-direction to resolve touch position in the x-direction. The first set of electrodes resolves touch position along the y-direction. Passive or active capacitive sensing techniques may be used to acquire the position information from the 2D touch panel.
    Type: Application
    Filed: July 2, 2010
    Publication date: October 28, 2010
    Inventor: Harald Philipp
  • Patent number: 7821425
    Abstract: Keyboards, keypads and other data entry devices can suffer from a keying ambiguity problem. In a small keyboard, for example, a user's finger is likely to overlap from a desired key to onto adjacent ones. An iterative method of removing keying ambiguity from a keyboard comprising an array of capacitive keys involves measuring a signal strength associated with each key in the array, comparing the measured signal strengths to find a maximum, determining that the key having the maximum signal strength is the unique user-selected key, and maintaining that selection until either the initially selected key's signal strength drops below some threshold level or a second key's signal strength exceeds the first key's signal strength.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: October 26, 2010
    Assignee: Atmel Corporation
    Inventor: Harald Philipp
  • Patent number: 7821274
    Abstract: A sensor includes a substrate with a sensitive area defined by a pattern of electrodes. The pattern of electrodes includes a first group of drive elements interconnected to form a plurality of row electrodes extending along a first direction, a second group of drive elements interconnected to form a plurality of column electrodes extending along a second direction, and a group of sense elements interconnected to form a sense electrode extending along both the first and second directions. The sensor may be coupled to a controller that includes a drive unit for applying drive signals to the row and column electrodes, and a sense unit for measuring sense signals representing a degree of coupling of the drive signals applied to the row and column electrodes to the sense electrode.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: October 26, 2010
    Assignee: Atmel Corporation
    Inventors: Harald Philipp, Samuel Brunet, Matthew Trend, Alan Bowens
  • Patent number: 7808255
    Abstract: A two-dimensional position sensor is formed by drive electrodes (52) and sense electrodes (62, 64, 66) both extending in the x-direction and interleaved in the y-direction. The sense electrodes comprise several groups, two of which co-extend in the x-direction over each different portions of extent in the x-direction. The drive and sense electrodes are additionally arranged to capacitively couple with each other. In use, drive signals are applied to the drive electrodes and then the resultant sense signals received from the sense electrodes measured. The position of a touch or stylus actuation on the sensor is determined in the x- and y-directions as follows. In the x-direction, the position is determined by an interpolation between sense signals obtained from co-extending pairs of sense electrodes, and in the y-direction by interpolation between sense signals obtained from different sequences of drive signals applied to the drive electrodes.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: October 5, 2010
    Assignee: ATMEL Corporation
    Inventors: Luben Hristov, Peter T Sleeman, Harald Philipp, Esat Yilmaz, Samuel Brunet
  • Publication number: 20100214259
    Abstract: A sensor is arranged to determine the presence of an object from a change in a capacitance of a sensing element. The sensor includes a capacitance measurement circuit operable to perform measurement cycles to measure a capacitance of the sensing element, and a controller circuit.
    Type: Application
    Filed: July 31, 2008
    Publication date: August 26, 2010
    Inventors: Harald Philipp, Esat Yilmaz
  • Publication number: 20100164889
    Abstract: Two different sets of electrodes in a touch sensitive device are formed to produce an electric field gradient from one end of the electrodes to the other end when opposite ends of the electrodes are driven with different voltages. A signal measuring cycle is performed by alternately driving the ends of one set of electrodes, while using the other set of electrodes to receive signals. The roles of the sets of electrodes are then reversed, such that the set that that was driven is now used to receive signals from the other set of electrodes. Reference signals may be obtained by driving both sides of one set of electrodes, and then both sides of the other set of electrodes. The signals obtained are then used to determine the touch position on the touch sensitive device.
    Type: Application
    Filed: December 21, 2009
    Publication date: July 1, 2010
    Inventors: Luben Hristov, Harald Philipp
  • Publication number: 20100141277
    Abstract: Methods and apparatus related to a sensor are discussed herein. The sensor can include a sensing element having a sensing path, the sensing element coupled to a sensing channel, and a processor configured to interpret a signal generated by the sensing channel indicative of a capacitance between the sensing path and a system ground. The processor can have a first mode configured to set a parameter to a desired value. The desired value can be related to a first position of an object sensed along the sensing path and a range of parameter values mapped to a length of the sensing path. A second mode can adjust the parameter based on a displacement of the object along the sensing path.
    Type: Application
    Filed: February 10, 2010
    Publication date: June 10, 2010
    Inventor: Harald Philipp
  • Publication number: 20100139991
    Abstract: Noise reduction in a one- or two-dimensional capacitive sensor array is achieved by rejecting and re-acquiring noisy signals. The sensor array is formed of crossed X and Y lines for drive and sense functions respectively, each of the X lines being driven in turn to acquire a full frame of data from the sensor array. A controller actuates the X lines in turn and, for each X line, charge is transferred to charge measurement capacitors connected to respective ones of the Y lines. The controller measures a signal value from a first one of the measurement capacitors, and then tests if that Y signal value has a magnitude lying within an acceptable range. If not, the measurement capacitors are all reset without their signal values being measured, and the controller re-drives the same X line to initiate another charge transfer into the measurement capacitors for that X line. It is then attempted once again to acquire Y signal values for that X line.
    Type: Application
    Filed: October 21, 2008
    Publication date: June 10, 2010
    Inventors: Harald Philipp, Esat Yilmaz
  • Publication number: 20100123670
    Abstract: A two-dimensional touch sensor comprising a plurality of electrodes arranged in a mesh pattern on a substrate. Each electrode is formed by interconnected metal traces, the metal being intrinsically opaque, but the metal traces being sufficiently narrow to be practically invisible. The metal traces have a width less than or equal to 10 ?m and occupy less than or equal to 5% of the area of each electrode. The electrodes can be deposited additively via a printing process, for example using copper as the metal. The narrow width of the tracks allows the film to be highly transparent, since the electric field used in capacitive touch screens can be made to propagate with very low metal densities.
    Type: Application
    Filed: April 10, 2009
    Publication date: May 20, 2010
    Applicant: Atmel Corporation
    Inventor: Harald Philipp
  • Publication number: 20100097077
    Abstract: A touch sensor senses the presence of an object at one of a plurality of channels on a surface of the touch sensor, wherein proximity of the object to the touch sensor results in a change in capacitance at the position of the channel. The touch sensor includes a drive circuit and a charge sensing circuit, each coupled to each of the channels. The charge sensing circuit includes at least one charge measurement capacitor. A measurement cycle is applied to the touch sensor having a drive portion and a sense portion. During the drive portion a charge is applied to the channels and therefore the charge measurement capacitors of the touch sensor, and during a sense portion the charge measurement capacitors are discharged by a predetermined amount and the remaining charge on the charge measurement capacitors is measured.
    Type: Application
    Filed: October 22, 2009
    Publication date: April 22, 2010
    Inventors: Harald Philipp, Esat Yilmaz
  • Publication number: 20100097133
    Abstract: An iterative method for generating a series of output signal values from a series of input signal values is described. Iterations of the method comprise the steps of obtaining a current input signal value for the current iteration, comparing the current input signal value with an output signal value determined in a previous iteration, updating a counter value determined in the previous iteration based on the result of the comparison between the current input signal value and the previous output signal value such that the updated counter value replaces the counter value determined in the previous iteration, determining a slew value based on the counter value; and adding the slew value to the previously determined output signal value to generate a new current output signal value. Thus different slew values may be added to the previous output signal to obtain a new output signal. The counter value is updated so that its value reflects recent trends in the input signals. E.g.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Inventors: Harald Philipp, Esat Yilmaz
  • Publication number: 20100097078
    Abstract: In a capacitive sensor of the type having X electrodes which are driven and Y electrodes that are used as sense channels connected to charge measurement capacitors, signal measurements are made conventionally by driving the X electrodes to transfer successive packets of charge to the charge measurement capacitors. However, an additional noise measurement is made by emulating or mimicking the signal measurement, but without driving the X electrodes. The packets of charge transferred to the charge accumulation capacitor are then indicative of noise induced on the XY sensing nodes. These noise measurements can be used to configure post-processing of the signal measurements.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Inventors: Harald Philipp, Daniel Pickett, Esat Yilmaz
  • Publication number: 20100044122
    Abstract: A capacitive touch sensor wherein the touch sensitive panel has drive electrodes arranged on the lower side of a substrate and sense electrodes arranged on the upper side. The drive electrodes are shaped and dimensioned to substantially entirely cover the touch sensitive area with individual drive electrodes being separated from each other by small gaps, the gaps being so small as to be practically invisible. The near blanket coverage by the drive electrodes also serves to screen out interference from noise sources below the drive electrode layer, such as drive signals for an underlying display, thereby suppressing noise pick-up by the sense electrodes that are positioned above the drive electrodes.
    Type: Application
    Filed: April 10, 2009
    Publication date: February 25, 2010
    Applicant: ATMEL CORPORATION
    Inventors: Peter Sleeman, Samuel Brunet, Matthew Trend, Harald Philipp
  • Publication number: 20100045632
    Abstract: A capacitive position sensor has a two-layer electrode structure. Drive electrodes extending in a first direction on a first plane on one side of a substrate. Sense electrodes extend in a second direction on a second plane on the other side of the substrate so that the sense electrodes cross the drive electrodes at a plurality of intersections which collectively form a position sensing array. The sense electrodes are provided with branches extending in the first direction part of the way towards each adjacent sense electrode so that end portions of the branches of adjacent sense electrodes co-extend with each other in the first direction separated by a distance sufficiently small that capacitive coupling to the drive electrode adjacent to the co-extending portion is reduced. Providing sense electrode branches allow a sensor to be made which has a greater extent in the first direction for a given number of sense channels, since the co-extending portions provide an interpolating effect.
    Type: Application
    Filed: April 10, 2009
    Publication date: February 25, 2010
    Applicant: ATMEL CORPORATION
    Inventors: Esat Yilmaz, Peter Sleeman, Samuel Brunet, Matthew Trend, Harald Philipp
  • Publication number: 20090303203
    Abstract: A method of sensing the presence of a body from a change in an amount of charge present on a capacitively charged key. The method comprises inducing charge onto the key during a drive part of a measurement cycle, coupling a signal measurement capacitor to the key during a signal measurement part of the measurement cycle to the effect that the charge induced on the key during the drive part of the measurement cycle is transferred to the signal measurement capacitor, determining from a noise measurement part of the measurement cycle an amount of charge induced on the key by noise during the signal measurement part of the measurement cycle, and controlling the drive part, the signal measurement part and the noise measurement parts of the cycle to provide the charge sensing circuit with a measurement of the signal from which the noise induced on the key has been or can be substantially cancelled.
    Type: Application
    Filed: May 14, 2009
    Publication date: December 10, 2009
    Inventors: Esat Yilmaz, Harald Philipp
  • Publication number: 20090303198
    Abstract: A method and apparatus for sensing the presence of a body from a change in an amount of charge present on a capacitively charged key includes performing a measurement burst which generates a plurality of signal sample values from a plurality of measurement cycles. Each of the measurement cycle includes inducing charge onto the key during a drive part of the measurement cycle, measuring during a signal measurement part of the measurement cycle the charge induced on the key during the drive part of the measurement cycle, and generating a signal sample value to represent of the charge measured from the key during the signal measurement part of the measurement cycle.
    Type: Application
    Filed: May 14, 2009
    Publication date: December 10, 2009
    Inventors: Esat Yilmaz, Harald Philipp
  • Publication number: 20090115431
    Abstract: A capacitive touch sensor is provided having sensing path for setting a color parameter to a desired value within a range, the color parameter being color hue, color saturation or color temperature. The sensor has a first mode of operation in which a parameter can be set approximately to a desired value and a second mode in which the value can be refined to the exact amount. In the first mode, the full range of possible values is mapped onto the sensing path and a user touch selects a value within the full range according to its position along the sensing path. In the second mode a finer adjustment is provided for, either by mapping a narrower sub-range of the full range onto the sensing path, or by allowing incremental adjustment of the parameter from the value initially set in the first mode, each incremental unit of adjustment being triggered by the object being displaced through a pre-determined threshold displacement along the sensing path.
    Type: Application
    Filed: December 22, 2008
    Publication date: May 7, 2009
    Inventor: Harald Philipp
  • Patent number: 7515140
    Abstract: A capacitive sensor for detecting the presence of an object adjacent a panel is described. The sensor comprises an electrically conducting sensor element coupled to a capacitance measurement circuit. In use, the capacitive sensor is mounted with the sensor element adjacent an underside of the panel. The sensor element includes a flared portion which deforms when pressed against the panel to provide an extended contact area between the sensor element and the panel. When a user touches an upper side of the panel above the extended contact area, the capacitance of the sensor element is modified. This is detected by the measurement circuit and identifies a touch.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: April 7, 2009
    Assignee: Atmel Corporation
    Inventor: Harald Philipp