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AssigneeTritech Microelectronics, Ltd.
InventorsChow Fong Chan, Maisy Mun Lan Ng, Eng Yue Ong, Xia Geng, Swee Hock Alvin Lim
Estimating the term…
Systems and methods for the detection of motions of a pointed object upon a writing surface such as a touchpad is disclosed. The motions will be detected and converted in a multiplexing analog-to-digital converter to digital codes representing the location of the pointed object and the pressure of the pointed object upon the touchpad. The location and the pressure will be translated into a pen detect signal indicating the presence of the pointed object upon the touchpad. The pen detect signal will be translated into a stroke signal to interpret a single tap, a double tap, and a tap and drag of the pointed object on the touchpad. The digital codes will be averaged to minimize noise and formed into an absolute coordinates digital code. The absolute coordinate digital code, the pressure digital code, and the pen detect signal will be converted to a touchpad-computer interface protocol. Further, multiple sets absolute coordinates will translated into a relative motion code. The absolute coordinates will be interpreted by an autocursor controller to determine if the pointed object has transited between a workzone and an edgezone of the touchpad to generate an autocursor code. The relative motion code, the stroke signal, and the autocursor code will converted to an industry standard computer input mouse protocol. An autopower control circuit and a battery gauge circuit will determine and control the battery condition.
A battery powered touchpad digitizing computer input device to detect a presence of a pointed object upon a surface, and to convert said presence to a set of digital codes that indicate absolute location and force of said pointed object upon said surface, if a pen input mode is selected, and to convert said presence to a speed and direction set of digital codes that conform to industry standard computer input mouse protocols, if a mouse mode is selected, comprising
A touchpad digitizer computer input device control circuit to accept electrical response signals generated by a pointed object in contact with a touchpad digitizer, and to create a pen-input protocol if a pen-input mode is selected and to create a computer input mouse protocol if the mouse mode is selected, for transmission to a computer system for control of a cursor upon a display screen, to signal an end of stroke in handwriting recognition programs, and to provide stroke, location, and pressure information to signature entry and verification programs, comprising:
Dependencies are inferred from the claim text.