CHRISTOPHER WILLIAM DEWS
Pilots at Benbow Dr, Fremont, CA
License number
California A0469847
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
41918 Benbow Dr, Fremont, CA 94539
Professional information
Alternating, Complementary Conductive Element Pattern For Multi-Touch Sensor
US Patent:
2010007, Apr 1, 2010
Filed:
Aug 18, 2009
Appl. No.:
12/543277
Inventors:
Christopher William DEWS - Fremont CA, US
International Classification:
G06F 3/041
US Classification:
345173
Abstract:
A touch sensor includes conductive elements of substantially concave shape to enable detection of multiple simultaneous touches in at least two directions, with reduced noise sensitivity and enhanced accuracy. The shapes of the conductive elements may be similar, or may be alternating, complementary shapes that cover substantially all of the sensor area. The conductive elements physically interact with adjacent elements in such a way that the area covered by a touch changes monotonically from overlapping substantially all of one element to overlapping substantially all of an adjacent element as the touch area is moved from one element to the other element along a line between the centers of those adjacent elements. Such monotonic change of touch overlap area may occur simultaneously in two orthogonal directions. Connections from internally positioned conductive elements to a touch controller may be made to pass through other conductive elements.
System And Method For Determining A Number And Position Of One Or More Touches On A Touch Screen
US Patent:
2013010, Apr 25, 2013
Filed:
Oct 25, 2011
Appl. No.:
13/281297
Inventors:
Christopher William DEWS - Fremont CA, US
International Classification:
G06F 3/044
US Classification:
345174
Abstract:
A method of determining a position and number of touches made on a capacitive touch screen device having capacitive touch sensor elements is provided. The method includes measuring capacitance values for each of the capacitive touch sensor elements, combining the capacitance values of each row of individual capacitive touch sensor to produce a horizontal sum of the capacitance values for each row, and combining the capacitance values of each column of individual capacitive touch sensor to produce a vertical sum of the capacitance values for each column. The method also includes determining a largest value of the horizontal sums and the vertical sums and normalizing the values of the vertical and horizontal sums to the largest vertical and horizontal sum, and applying one or more rules to the normalized horizontal and vertical sums to determine the number of touches made on the capacitive touch screen device.
Multi-Touch Touch Screen With Single-Layer Ito Bars Arranged In Parallel
US Patent:
8248383, Aug 21, 2012
Filed:
Apr 21, 2009
Appl. No.:
12/427460
Inventors:
Christopher William Dews - Fremont CA, US
Assignee:
Integrated Device Technology, Inc. - San Jose CA
International Classification:
G06F 3/041
US Classification:
345173, 178 1801
Abstract:
A touch screen includes a plurality of single-layer ITO bars having a substantially rectangular shape and arranged in parallel to each other in order to detect touches on the touch screen. The location of a touch on the touch screen in the direction along an ITO bar is determined by applying a signal on one end of the ITO bar and measuring the change in the amplitude and the delay of the signal on the opposite end of the ITO bar. Such application and measurement of the signal can be repeated with the application of the signal occurring on the opposite end of the ITO bar and the measurement of the signal occurring on said one end of the ITO bar, in order to enhance the accuracy of the measurement.
Acoustic Wave Touch Detecting Apparatus
US Patent:
2005003, Feb 17, 2005
Filed:
Nov 12, 2003
Appl. No.:
10/712753
Inventors:
Yoshikazu Tanaka - Yokohama, JP
Daniel Scharff - San Leandro CA, US
Christopher Dews - Fremont CA, US
Daniel Scharff - San Leandro CA, US
Christopher Dews - Fremont CA, US
Assignee:
ELO TOUCHSYSTEMS, INC. - Menlo Park CA
International Classification:
G01H011/06
US Classification:
31031300D, 073649000
Abstract:
An FPC is constructed of two FPC branches, and a connection line that connects to a controller. Printed wiring of the connection line includes ten printed wires. The central four printed wires are signal reception wires, which are connected to two converters (sensors). Grounding wires are provided on both sides of the four signal reception wires. Two outer signal wires are provided adjacent to the grounding wires, respectively toward the outsides thereof. Further, two more grounding wires are provided adjacent to the outer signal wires, respectively on the outsides thereof. This construction results in shielding of all of the signal wires. This relationship is maintained in the FPC branches as well.