Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1997-12-03
2000-09-19
Wu, Xiao
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345162, G09G 508
Patent
active
06121955&
ABSTRACT:
The invention discloses a computer joystick having two optical sensors to generate vector signals for indicating the current position of the joystick's handle. The computer joystick comprises a housing having an opening at its top, two mutually perpendicular shafts rotatably installed inside the housing, a joystick handle rotatably installed in the opening of the housing, an engaging means mounted at a bottom end of the joystick handle for rotatably engaging the two shafts, two optical sensors installed in the housing close to the two shafts for detecting rotations of the two shafts and generating corresponding displacement signals, and a control circuit having a memory for storing a coordinate as a position of the joystick handle, and a processor wired to the two optical sensors for updating the coordinate of the joystick handle according to the displacement signals generated by the two optical sensors and generating vector signals according to the coordinate of the joystick handle to indicate the current position of the joystick handle.
REFERENCES:
patent: 3541521 (1970-11-01), Kater
patent: 4533827 (1985-08-01), Fincher
Primax Electronics Ltd.
Wu Xiao
LandOfFree
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