A computer joystick having a sliding member for measuring rotations of the joystick's control handle is disclosed. The computer joystick comprises a housing having an upper opening, a vertical control handle having a hand holding part and a ball-shaped knob having a vertical groove installed in it, a knob holding means installed under the upper opening of the housing for rotatably holding the knob of the control handle, a sliding member having an inner end, a supporting means installed in the ho...

This invention provides an optical sensing system for detecting displacements of a slidable frame along an elongated plate of the system and generating corresponding position or displacement signals. The optical sensing system comprises a housing, an elongated plate horizontally installed in the housing having a plurality of positioning holes and a plurality of parallel conductors installed in it, a slidable frame having a sliding hole in its middle for slidably engaging the elongated plate, an ...

The present invention provides a cursor control system for controlling operations of a pop-up menu. The menu comprises a plurality of command regions, each of which has a correspondent computer command. The system comprises a displaying device for displaying the pop-up menu, a computer electrically connected to the displaying device and a cursor control device electrically connected to the computer. The computer comprises a program for controlling image display of the displaying device and opera...

A cursor control device electrically connected to a computer is used for controlling movements of an object within a three-dimensional image displayed over a screen of the computer. The computer comprises a computer program for controlling display of the three-dimensional image over the screen and for moving the object within the three-dimensional image. The three-dimensional image comprises a first, a second and a third coordinates mutually perpendicular to each other. The cursor control device...

The present invention provides a structural graph display system which utilizes index tables and index numbers to replace repeatedly occurred graphic parameters stored in a graphic description file so that overall memory requirement for storing the graphic description file can be substantially reduced. Within the graphic description file, a plurality of structural graphs are stored. Each structural graph comprises at least one sub-graph and each sub-graph contains a plurality of sub-graph parame...

A view control system for controlling the display of a view within an image over a computer monitor is disclosed. The system comprises a computer for displaying the view over the monitor and for scrolling the view within the image according to scrolling signals so that various portions of the image can be seen through the view, a computer mouse electrically connected to the computer through a flexible cable for controlling movements of a cursor displayed over the monitor, a view control button i...

A fuzzy logic control method for controlling an electrical motor aided, manually powered vehicle is disclosed which is used to assist a rider of the vehicle. The vehicle comprises a gear transmission for driving the vehicle, a manually powered operator for receiving a manual force inputted by the rider for manual operation of the gear transmission, a servo motor for generating a torque output, a reduction gear and a clutch for coupling the torque output of the motor to the gear transmission, a b...

The present invention relates to a keyboard with a two-dimensional actuator for generating direction signals which can be used to move a cursor shown on a screen to a target position. The keyboard comprises an encoding circuit, a plurality of text keys connected to the encoding circuit each for generating a corresponding text signal, four direction keys connected to the encoding circuit each for generating a corresponding direction signal, and a two-dimensional actuator connected to the encoding...

The present invention relates to a peripheral control system for controlling at least one peripheral device. The peripheral control system comprises a first computer electrically connected to a peripheral device comprising a memory for storing programs and data, and a processor for executing the programs stored in the memory; at least one peripheral driver program stored in the memory in an executable file format for driving the peripheral device. The peripheral driver program comprises a DDE (D...

A dual screen displaying device for displaying two NTSC video signals on the left and right sides of a monitor is disclosed. The displaying device comprises two tuners for receiving wireless signals from an antenna and generating two video signals V1 and V2, two digitizing circuits for digitizing the video signals V1 and V2, a control circuit for merging the outputs of the two digitizing circuits, a digital-to-analog converter for converting the merged digitized signals back to a combined video ...