Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2007-06-13
2010-11-30
Mengistu, Amare (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S175000, C345S178000, C178S018070, C178S018010
Reexamination Certificate
active
07843440
ABSTRACT:
A scrolling electronic whiteboard is provided, including a thin-film antenna board, at least an electromagnetic signal transmitter, a main control board, and a scrolling mechanism cassette. The scrolling mechanism cassette is for providing the housing of the thin-film antenna board to scroll and extend by pulling. The thin-film antenna board can be entirely scrolled and housed inside the scrolling mechanism cassette. The electromagnetic signal transmitter includes a resonant circuit for transmitting an electromagnetic signal of a specific frequency to determine the length of the thin-film antenna board being pulled outside of the scrolling mechanism cassette. The main control board is for receiving the antenna loop signals of the thin-film antenna board, and the electromagnetic signals of each electromagnetic signal transmitters. Therefore, a large electronic whiteboard can vary its dimensional ratio by pulling out different length of the thin-film antenna board, which can also be entirely retracted into the scrolling mechanism cassette for easy storage and transportation.
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patent: 2008/0121349 (2008-05-01), De La Cruz
Chen Chin-Yen
Yeh Chia-Jui
Mengistu Amare
Patel Premal
WALTOP International Corp.
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