Education and demonstration – Identification of person or handwriting analysis
Reexamination Certificate
2001-07-10
2002-11-26
Vo, Hieu T. (Department: 3754)
Education and demonstration
Identification of person or handwriting analysis
C434S162000, C434S169000, C382S312000
Reexamination Certificate
active
06485306
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a locus-recordable portable handwriting device, in which a plurality of antennas will receive electromagnetic waves emitted from a wireless stylus on a handwriting tablet and a microcomputer is supposed to scan over all the antennas and calculate the locus of the stylus on surface of the handwriting device and sequentially store the point coordinates of the locus in the memory.
BACKGROUND OF THE INVENTION
A conventional handwriting device for data input of a wireless stylus is generally an input device with cord, namely, the handwriting device must be connected with a computer to obtain power source and transmit the handwriting data to the computer for procession and display of the results on the computer monitor. Therefore, the conventional handwriting tablet is considered nonportable and incapable of recording locus of the wireless stylus.
SUMMARY OF THE INVENTION
The primary object of this invention is to provide a locus-recordable portable handwriting device, which can function to record locus of a wireless stylus, switch memory pages, switch locus colors, clear data, establish a built-in power supply, and enhance portability of the device.
In order to realize abovesaid object, the locus-recordable portable handwriting device of this invention comprises a microprocessor, a memory, a power-control unit, a display unit, a data-clearance switch, a memory-page scrolling switch, and a locus-color switching switch.
For more detailed information regarding advantages or features of this invention, at least an example of preferred embodiment will be elucidated below with reference to the annexed drawings.
REFERENCES:
patent: 4262281 (1981-04-01), Buckle et al.
patent: 4633436 (1986-12-01), Flurry
patent: 4866646 (1989-09-01), Nakamura et al.
patent: 5202844 (1993-04-01), Kamio et al.
patent: 5587560 (1996-12-01), Crooks et al.
patent: 5612720 (1997-03-01), Ito et al.
patent: 5730602 (1998-03-01), Gierhart et al.
patent: 6229919 (2001-05-01), Hirayama
AIPTEK International Inc.
Vo Hieu T.
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