To provide a non-mechanical pointing device which is inexpensive, highly reliable, used by a user as is the case with the conventional mouse.
The pointing device 1 is attached to an opening 13 on the bottom and near an opening inside a housing and includes illumination light sources 2, 3 for illuminating the surface shape of an operation surface and an optical motion detection circuit 12 which generates a motion instruction signal indicating a motion to the illuminated surface shape visible via the openings in the directions of first and second axes. The optical motion detection circuit includes a plurality of optical detectors 10, each of which has output, a memory including a reference frame with a digitized output value of an optical detector and a digitized sample frame of the optical detector obtained next to the reference frame and a comparison frame is further correlated to the sample frame to confirm motions of the directions of the first and the second axes.
KNEE DEREK L
BADYAL RAJEEV
HARTLOVE JASON T
| JPH01287725A | 1989-11-20 | |||
| JPS63177757U | 1988-11-17 | |||
| JP2002502077A | 2002-01-22 | |||
| JPH03287002A | 1991-12-17 | |||
| JPH02266414A | 1990-10-31 | |||
| JPH01161521A | 1989-06-26 | |||
| JPH09190277A | 1997-07-22 |
| WO1999039304A1 | 1999-08-05 |
Takahiko Mizobe