Computer graphics processing and selective visual display system – Display peripheral interface input device – Stylus
Reexamination Certificate
2001-04-09
2004-12-14
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Stylus
C345S156000, C178S019010, C382S189000
Reexamination Certificate
active
06831632
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to apparatus and methods for hand motion detection and handwriting recognition generally.
BACKGROUND OF THE INVENTION
The following U.S. patents are believed to represent the current state of the art: U.S. Pat. Nos. 5,159,321; 5,247,137; 5,294,792; 5,434,371; 5,453,758; 5,517,579; 5,587,558; 5,598,187; 5,781,661; 5,902,968; 5,981,884; 6,084,557; 6,130,666;
The following PCT International Publications are believed to represent the current state of the art: WO 94/09447; WO 94/18663; WO 95/21436; WO 99/22338;
SUMMARY OF THE INVENTION
The present invention seeks to provide improved apparatus and methods for hand motion detection and handwriting recognition as well as hand held computing and communication devices employing such apparatus and methods.
There is thus provided in accordance with a preferred embodiment of the present invention an apparatus for handwriting recognition including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output and providing a velocity indicating output and a handwritten multiple character recognizer receiving the velocity indicating output and providing a multiple character recognition output indication.
There is also provided in accordance with a preferred embodiment of the present invention an apparatus for handwriting recognition including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output, discarding user specific components therein and providing a non-user specific output and a handwritten character recognizer receiving the non-user specific output and providing a character recognition output indication.
There is further provided in accordance with a preferred embodiment of the present invention an apparatus for hand motion tracking including a handheld device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output and providing a proportionally normalized velocity indicating output and a hand motion tracker receiving the velocity indicating output and providing a tracking output indication.
There is further provided in accordance with another preferred embodiment of the present invention an apparatus for hand motion tracking including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output, discarding user specific components therein and providing a non-user specific output and a hand motion tracker receiving the non-user specific output and providing a tracking output indication.
There is also provided in accordance with yet another preferred embodiment of the present invention an apparatus for handwriting recognition and hand motion tracking including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output and providing a velocity indicating output, a handwritten character recognizer receiving the velocity indicating output and providing a multiple character recognition output indication and a hand motion tracker receiving the velocity indicating output and providing a tracking output indication.
There is also provided in accordance with a preferred embodiment of the present invention an apparatus for handwriting recognition and hand motion tracking including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output, discarding user specific components therein and providing a non-user specific output, a handwritten character recognizer receiving the non-user specific output and providing a character recognition output indication and a hand motion tracker receiving the non-user specific output and providing a tracking output indication.
There is also provided in accordance with yet a further preferred embodiment of the present invention a pen computer including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry located within the hand-held device and receiving the acceleration indicating output and providing a non-user specific output, a handwritten character recognizer located within the hand-held device and receiving the non-user specific output and providing a character recognition output indication and a computer located within the hand-held device for receiving the character recognition output indication as performing computer operations in response thereto.
There is further provided in accordance with a preferred embodiment of the present invention a pen communicator including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry located within the hand-held device and receiving the acceleration indicating output and providing a proportionally normalized velocity indicating output, a handwritten character recognizer located within the hand-held device and receiving the proportionally normalized velocity indicating output and providing a character recognition output indication, and a communication device located within the hand-held device for receiving the character recognition output indication and performing communication operations in response thereto.
Further in accordance with a preferred embodiment of the present invention the accelerometer includes a plurality of accelerometers providing outputs to acceleration processing circuitry, which provides the acceleration indicating output.
Still further in accordance with a preferred embodiment of the present invention the computation circuitry is also operable to perform at least one of Calculator, Database, Personal Information Management (PIM) and Personal Digital Assistant (PDA) functionalities, including at least one of address and phone book, data-bank, calendar, time management, calculator, expenses tracking and management, “to do list” management, note and memo taking, dictionary, translator and speller, smart-card, magnetic card, credit-card, electronic-wallet, remote-control and smart key functionalities and to provide a computation output resulting therefrom.
Further in accordance with a preferred embodiment of the present invention the apparatus for handwriting recognition also includes communication circuitry.
Preferably, the communication circuitry provides functionality for at least one of a telephone, paging, SMS, WAP, Email, Internet browsing and POTS functions.
Additionally in accordance with a preferred embodiment of the present invention the apparatus for handwriting recognition also includes at least one of a microphone, a speaker, an earphone, an audio interface, an audio processor, a digital signal processor, a display, an image processor, a control circuitry, a CPU, a MPU, a memory, a transceiver, an antenna, a baseband controller, a baseband interface, an Input/Output port, a wireless port, a Bluetooth output, an infra-red port, a serial port, a USB port and data acquisition circuitry.
Further in accordance with a preferred embodiment of the present invention the apparatus is employed as a writing implement.
Still further in accordance with a preferred embodiment of the present invention the computation circuitry provides at least one of proportional normalization of velocity, identifies minimum motion points, normalizes at least a portion of the acceleration indicating output to a level of an average of a first few samples of the acceleration indicating output, and determining a last intentional motion sample of the acceleration indicating output and eliminates samples following the last intentional motion sample of the acceleration indicating output.
Additionally in accordance with a preferred embodiment of the present inven
I. C. + Technologies Ltd.
Ladas & Parry
Wu Xiao
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