Abstract: A high slew rate amplifying circuit, for a TFT-type of LCD system, includes: an operational amplifier; a pull-up transistor connected to the output of the operational amplifier; a pull-down transistor to the output of the operational amplifier; a control circuit to selectively actuate the pull-up transistor and the pull-down transistor, e.g., according to at least one of a polarity signal and an output enable signal.

Abstract: An input generating device for use in a hand held electronic device having a housing includes a core formed in a planar and semicircular in shape, forming a peripheral edge extending around said core and a track slidably engaged with the peripheral side edge. A curved portion of the peripheral edge extends outwardly from the housing allowing access thereto by the user. A first input is generated by sliding movement of the flexible track relative to the core. First input detection means, such as a turns encoder switch detects the sliding movement of the track. The core is depressibly mounted within the housing, generating a second input when the core is depressed. A second input detection means, such as a tactile contact switch detects depression of the core.

Abstract: In an analog input device, a rubber member is provided between a key top and a movable electrode of an analog-quantity generating unit. A dead zone can be removed or reduced by forming a bottom portion of the rubber member of a flat or curved face. Furthermore, since first round surfaces are connected to an outer side face, the linearity of the input (e.g., a load)-output (voltage) characteristic can be enhanced.

Abstract: A mobile display device capable of communicating with a host computer depending upon whether it is coupled with a docking station. The mobile display device includes a wired module for receiving the wired input signal applied from the docking station and converting the wired input signal into a first video signal; a wireless module for converting the wired or wireless input signal applied from the host computer into a second video signal; a display panel for reproducing the first video signal and the second video signal; and a display controller for converting the first and second video signals applied to the display panel from the wired module and the wireless module depending upon whether the mobile display device is coupled with the docking station, and applying to the display panel a control signal for turning on and off images reproduced from the display panel upon the above-described conversions.

Abstract: A multi-function force reflecting haptic interface including various sub-assemblies is disclosed. The sub-assemblies include multiple function user interfaces, a user interface docking station for setting the interface to a home position, temperature monitoring and control systems, and various kinematic cable drive systems.

Abstract: This invention applies illustratively to a horizontal driving circuit for a liquid crystal display device, and to a liquid crystal display device utilizing that horizontal driving circuit. With a CMOS latch cell 12 disconnected from power supplies VDD2 and VSS2, the input of the latch cell 12 is connected to an upstream circuit 51 so as to set corresponding data on the cell. Then with the input of the CMOS latch cell 12 disconnected from the upstream circuit 51, the power supplies VDD2 and VSS2 to the CMOS latch cell 12 are switched on to level-shift the data set on the latch cell 12.

Abstract: An active matrix type display panel comprising a first base plate, a second base plate, and a liquid crystal disposed therebetween. The first base plate has thin film transistors formed thereon in the form of a matrix. The second base plate has a counter electrode formed thereon. The source of the thin film transistor are connected to information signal input electrodes which form counter electrodes of capacitive elements for sampling-and-holding information signals.

Abstract: A system for producing graphic displays includes a terminal having a display. Input devices such as a graphics tablet provide graphics input data to the system. A multilayered segmented graphics editor edits data supplied to the system. A device independent graphic data base stores edited graphics data of a plurality of symbols appearing on the display. A graphic controller controls the editor and the display. The system includes a program generator for generating corresponding source code programs for graphic displays on independent devices. The programs may be test program sets for automatic test equipment or source codes for computer aided design equipment or printers. The generated source codes may have control structures which permit the display of the independent device to be dynamically altered in response to inputs from the independent device.

Abstract: A display system and method, especially for use in an aircraft head up display system, for maintaining an optical image in a predetermined position on a light emitting screen. The system has a beam type image generator controlled by an operating circuit. A controlled beam scans both a central display region and marginal regions of the screen. The marginal regions have beam sensors and the beam is controlled by a sequence of plural coordinate commands in accordance with a plural coordinate search pattern restricted to the marginal regions and in the vicinity of the beam sensors. Signals resulting therefrom are utilized to eliminate beam deflection errors.

Abstract: In order to indicate a function status which can be one of three states, upon detecting a first state, a bicolor LED is lighted with a first color; upon detecting a second state, the LED is lighted with a second color; and upon detecting a third state, the LED is alternately lighted with said first and said second colors at a sufficiently high rate to cause the color of the LED to appear as a third color.

Abstract: An accessory (40) for a computer mouse (18) includes a multistrand accessory conductor (42) for transmitting location signals and acceptance signals having a first coupling (44) for coupling a first end of the conductor (42) to the coupling (26) of a computer mouse assembly (19) and a second coupling (46) for coupling a second end of the conductor (42) to a coupling (22) of a computer (10). The accessory further includes a remote acceptance switch (54) coupled to the strands of the multistrand accessory conductor including a hand-operated button (56) for producing an acceptance signal similar to the acceptance signal produced by an acceptance switch (38) of the computer mouse (18). Thus, a cursor location generated by movement of the computer mouse can be accepted in a memory of the computer either by activation of the mouse acceptance switch or the remote acceptance switch.

Abstract: Graphics information display panels made up of basic picture elements running to hundreds, or more, are useful for being viewed for advertising, transportation information, traffic control, news, weather, financial data and other information normally generated by computers. The system has capability in alphanumeric and also for color graphics designs in four colors through use of a basic display element with a transparent cylinder having four different color pigment enclosing compartments (or cavities) rotatable about a center rod mounting thereof. A six cavity transparent cylinder provides for design displays in six colors. Color pigments, either liquid or powder, are used to fill pixel cylinder cavities as fade resistant color medias where exposure to sunlight or ultraviolet radiation otherwise tends to cause deterioration of color pigment.

Abstract: A display control apparatus comprises area specifier, area determiner and signal selector. The area specifier specifies at least one area of a bit map memory. The area determiner determines whether the scan position on the bit map memory is in the specified area or not, and, according to the determination, controls the signal selector so as to send the output of the bit map memory directly or through a look-up table to a display unit. In a modification, the signal selector selects the signal to be sent to the display unit from among the outputs of different look-up tables.

Abstract: A graphics tablet is presented which has an x-y grid of wire traces embedded on it. Drive wires are coupled to the trace wires in both the x-direction and the y-direction. When a stylus is placed in contact with the graphics tablet, the location of a sector of the graphics tablet where the stylus contacts the graphics tablet may be determined by sequentially placing a signal on each drive wire and measuring the strength of the signal received by the stylus. The closer the stylus is to a particular trace, the stronger the signal which is received by the stylus from the drive wire coupled to that trace. The identity of a plurality of drive wires in the x-direction and a plurality of wires in the y-direction with the strongest received signal can be used to determine a unique address for the location of the sector of the graphics tablet where the stylus contacts the graphics tablet.

Abstract: A plurality of keys are mounted in parallel columns on a key supporting panel for reciprocation between upper, inactive positions and lower, active positions. Each key comprises a translucent core having a legend on its upper end, a conductor on its lower end, and an opening therethrough intermediate its ends. Each core is mounted for reciprocation at its lower end in a plastic sleeve, which is removably mounted by a flexible detent in one of the openings in the panel, and is surrounded adjacent its upper end by a flexible sleeve or hood which resiliently urges the key core to its upper position. In each column of key cores the openings in the latter register with each other, and an elongate electroluminescent strip extends through the registering openings and beneath the panel to prevent accidental withdrawal of the keys, and to illuminate the legends on a column of keys when energized.

Abstract: An active matrix-type display device including a plurality of field effect transistors arranged in a matrix, a plurality of gate lines, an apparatus for combining the gate lines in a set of combinations each containing two or more gate lines and for changing the set of combinations, and a driver for sequentially driving the combinations of gate lines so that the gate lines contained in a combination are driven simultaneously and all the gate lines are scanned in one vertical scanning period.

Abstract: A horizontal scrolling apparatus that provides scrolling on a character-by-character basis including a screen memory and associated visual attribute memory having associated therewith a scroll control memory for storing at least one bit for controlling horizontal scrolling. A latch controls writing into the scroll control memory to provide an enable bit therein, only in those locations corresponding to characters that are to be scrolled. An offset number is stored in an offset register, which number is variable under computer control. Operation of an adding circuit is responsive to sensing of the enable bit for adding the offset number to the present screen address to provide an offset address. The offset address is coupled to the video memory for display of the character associated with the offset address in the screen address position.

Abstract: An image display apparatus including a display memory which is accessed by a central processing unit for controlling input/output traffic of image information and by an image display device such as CRT in a time division multiplex mode. There are further provided a circuit for detecting a time deviation between a signal (Ac) representing a period during which the central processing unit can access the display memory and a signal (ALE) denoting an initiation of a machine cycle, and a circuit for controlling the wait condition in the central processing unit in accordance with the detected time deviation, so that the access of the central processing unit to the display memory is always synchronized with the access of the image display device to the display unit.

Abstract: A pixel rounding method and circuit for bit-map graphics displays. The pixel codes are divided into two groups "high" and "low", and pixels with "high" groups codes are rounded against pixels with "low" group codes. The rounding can be prerounding or postrounding and involves extending a rounded pixel partway into the adjacent (preceding or succeeding) pixel position. Rounding decisions are made by detecting diagonal relationships of "high" and "low" group codes in blocks in four pixel codes. A rounding circuit receives a pixel code stream and produces a version thereof which is delayed by one pixel period. In accordance with the rounding decisions, the original and delayed pixel code streams are selectively switched each half pixel period to provide a resultant pixel code stream which is used to generate the display.

Abstract: A crosspoint encoder having a n-key rollover data collection system in which all keystrokes are recognized. A phantom key detection routine detects phantom key conditions and provides for temporary storage of subsequent keystrokes until the phantom condition is removed thus ensuring uninterrupted recordation of all keystrokes.