Computer graphics processing and selective visual display system – Display peripheral interface input device
Reexamination Certificate
2007-12-25
2007-12-25
Patel, Nitin I. (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
C345S158000
Reexamination Certificate
active
10730602
ABSTRACT:
An electronic blackboard displays information and optically detects input information on a display/writing surface by determining the corresponding coordinates. To determine the input coordinates, a predetermined number of pairs of light emitting elements and light detecting elements are placed in parallel for each axis near the edges. The light emitting elements and the light detecting elements are also linearly and equidistantly placed. A control unit is connected to the light emitting elements for sequentially activating these light emitting elements and for controlling the light detecting elements to detect the light in an overlapping manner. Based upon the above positional information from the light detecting elements, an input coordinate determination unit determines the input coordinates of an input on the display/writing surface.
REFERENCES:
patent: 5577733 (1996-11-01), Downing
patent: 6762747 (2004-07-01), Fujioka et al.
patent: 7113174 (2006-09-01), Takekawa et al.
patent: 2003/0206306 (2003-11-01), Omura et al.
Fujioka Susumu
Omura Katsuyuki
Tsuda Kunikazu
Knoble & Yoshida & Dunleavy LLC
Patel Nitin I.
Ricoh & Company, Ltd.
LandOfFree
Coordinate input detection device and method for electronic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coordinate input detection device and method for electronic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coordinate input detection device and method for electronic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3884543