Method of generating digital ink thickness information
May 4, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3577022 Signature verification method and apparatus Signature verification method and apparatus utilizing both acceleration and pressure characteristics Data input pen for Signature Verification Computer graphics system electronically simulating painting on canvas Autonomous computer input device and marking instrument Hand-held electronic writing tool Light pen input systems Pen-shaped handwriting input apparatus using accelerometers and gyroscopes and an associated operational device for determining pen movement Graphical keyboard Patent #: 6094197 InventorsAssigneeApplicationNo. 09849170 filed on 05/04/2001US Classes:345/179, Stylus345/156, DISPLAY PERIPHERAL INTERFACE INPUT DEVICE345/180, Light pen for CRT display345/183, Light pen for controlling plural light-emitting display elements (e.g., LED, lamps)345/182, Light pen for fluid matrix display panel345/441Shape generatingExaminersPrimary: Hjerpe, RichardAssistant: Nguyen, Jennifer T. Attorney, Agent or FirmForeign Patent References
International ClassG09G 5/00AbstractA method and system that converts ballistic movement of a pen (e.g., movement of a pen point across a surface) into thickness information for digital ink data. The pen includes at least one accelerometer that is used to generate the ballistic information. A thickness conversion component may be located on a computer that is remote from the pen, and the ballistic information is transmitted to the computer via a hardwired or wireless connection. The accelerometer generates the ballistic information in the form of pulses, the width of which is directly related to the acceleration of the pen movements. The thickness conversion component converts the acceleration information, with or without additional information such as coordinate information, into thickness information for digital ink. This thickness information may be used to generate variably thick lines, which may be useful for a variety of applications, for example, better display and improved recognition.Other References
Field of SearchTouch panelIncluding impedance detection Including optical detection Transparent substrate having light entrapment capability (i.e., waveguides) With alignment or calibration capability (i.e., parallax problem) Including surface acoustic detection Stylus Light pen for CRT display CRT having tracking capability Light pen for fluid matrix display panel Light pen for controlling plural light-emitting display elements (e.g., LED, lamps) DISPLAY PERIPHERAL INTERFACE INPUT DEVICE Cursor mark position control device Including orientation sensors (e.g., infrared, ultrasonic, remotely controlled) Capacitive Inductive With illumination Acoustical (e.g., vibration, ultrasonic, etc.) Capacitive or inductive stylus Writing digitizer circuit Light pen Acoustical stylus AC source Multifrequency Having shield Writing digitizer stylus Error correction Pressure stylus Resistive Writing digitizer pad Optical Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry) | |
