A multipurpose keyswitch for controlling cursor movement on a CRT display and for character entry includes a key cap that moves laterally to provide cursor control and that moves vertically for character entry. Sensors are coupled to the key cap for sensing the lateral movement of the key cap. Forward and backward movement of the key cap selects upward and downward movement of the cursor on the CRT display. Left and right movement of the key cap selects left and right movement of the cursor. Ver...

A matrix-addressed display device having a cursor which is movable independently of the displayed information is disclosed. Two interrupt circuits are used to override or interrupt the refresh cycling of the displayed information and to relocate the cursor in the display device in response to a user input control such as a keyboard, joy stick or the like. One interrupt circuit comprises a pair of AND gates and an inverter, while the other interrupt circuit comprises a plurality of AND gate pairs...

A method for positioning a cursor relative to a reference position on the display using the pointing device includes the steps of positioning the cursor at a position on a display with a pointing device, selecting the position as the reference position, the reference position associated with an object, moving the cursor to a plurality of cursor positions not associated with the object on the display with the pointing device, and displaying a plurality of offset values on the display, the offset ...

A cursor magnifying glass arrangement has a support body for holding a magnifying glass body having a cylindrical portion and a lens section. The cylindrical portion is rotationally symmetrical with respect to the cylindrical axis and is convexly curved. An evaluation coil is disposed coaxially to the cylindrical portion. The lens body is removably, preferably interconnectedly, supported in the support body, and the evaluation coil is fixed on the support body radially outside of the path of the...

An architecture for generating a hardware cursor in the context of a bit mapped video display system operable from a frame buffer with non-displayed but addressable memory space. A segment of the non-displayed memory is loaded with cursor information controlling the generation of its outline and its color pattern. When accessed, this cursor control data is accessed from the non-displayed segment of the memory during each horizontal blank time preceding the raster scan of the video pattern data s...

A cursor control device, such as a trackball, controls the movement of a cursor on a computer display. An electromagnetically generated braking effect is applied to the trackball, which effect varies with the speed of the cursor to allow precise control of the cursor.

A cursor generating apparatus applicable to computer graphics is disclosed. The cursor generating apparatus comprises registers (47, 49) for receiving and holding information indicative of start and end points of a vertical cursor; a counter (57) for counting block numbers now being scanned on the basis of scanning timing related signals, when a scanning line is divided into plural blocks each including a predetermined number of pixels on the display screen; comparators (53, 55) for comparing th...

An assembly utilizable with a digitizer cursor for increasing the accuracy of position determinations made by the operator is disclosed. The assembly comprises in combination a magnifying lens and a connector for attaching the magnifying lens to the cursor in a region about the cross-hairs of the cursor. The connector includes a retainer that is attachable to the cursor and a pivot connected to the lens. The retainer is adapted to be affixed to a surface of the housing near the viewsight of the ...

A method displays a visual "trail" (12b) behind a moving cursor (12a) so that the cursor does not disappear from a liquid crystal display (12) during rapid cursor movement. The method interpolates and displays one or more intermediate cursor locations between a previous cursor location and a present cursor location. A method also extrapolates one or more future cursor locations (12c) from a present location and prematurely turns on, or biases, pixels located at the extrapolated future locations ...

A cursor mechanism with an encoder function having a key member, an encoder input transmission member, a plurality of cursor input pressing members and a universal joint. The key member has an encoder rod extending from a center of a bottom thereof and a plurality of cursor rods extending downward from the bottom of the key member surrounding the encoder rod annularly. The transmission member has one end engaged with an encoder and another end connected to a free end of the encoder rod through t...