Abstract: In an exemplary data entry terminal, the keyboard, display module, and terminal processor board form respective subassemblies which can readily be disconnected from each other electrically and slidably removed from respective channels of a U-shaped housing extrusion. A cathode ray tube of the display module may be viewed through a window forming part of the keyboard subassembly. In the case of a pizza home delivery system, bar codes identifying the orders are printed out for facilitating handling, and order handling and delivery are computerized for optimum speed and accuracy.

Abstract: A graphics display apparatus using a character generation architecture is disclosed. A font memory is disclosed which can be addressed to provide a different character for each character position on a display screen. In this manner graphics images can be manipulated at character generation speeds. Further, memory can be more efficiently used and font registers and additional pages of memory are not required to accommodate an expanded font list. In accordance with the present invention, attributes are generated in hardware so that the base text can remain unchanged even though the attributes of the text are changed. A unique echo circuit is provided to generate a bold faced attribute, including an anti-smear function. In the preferred embodiment of the present invention, a single memory is used to store textual and font information, thus reducing the size and costs of the character generation architecture.

Abstract: A video monitor operable in either a 16 or 64 color mode includes a PROM having logic level color video inputs and logic level function inputs, including a mode select input, for accessing different memory locations at each of which binary data is stored for activating a plurality of logic level color video outputs. A plurality of analog R, G and B processing circuits are coupled to the PROM outputs, with their gains being controlled by the color video signals supplied from open collector connected outputs in the PROM. The gains are user adjustable by means of logic level driven analog circuits. The horizontal scan frequency differs in the two modes and a mode switched brightness compensation output is provided by the PROM.

Abstract: A line-filtering antialiasing apparatus for a computer graphics display, with a set of parallel pixel processors functioning independently in a line drawing system and with plotting apparatus assigning individual pixels to the processors so as to track to the line. An optimum number of sixteen processors filter proximity data based on the vertical distance from a pixel center to the line center for shading pixels to gray-scale intensity in an area of influence four pixels wide. Line terminations are extended and shaded at the termination area. Pixel values for individual lines are summed to develop a total display image.

Abstract: A ferroelectric liquid crystal matrix display drive waveform scheme and circuit are disclosed which produce a resultant waveform at each pixel defined by the intersections of row and column electrodes that varies among three levels during each strobe interval. In a matrix of N rows and M columns, the rows are serially strobed with a strobe waveform that varies through three levels to provide select and non-select strobe signals. During each strobe interval, the column driver circuitry generates three-level and three-phase, time-variant drive waveforms. The circuit can provide up (write) and down (erase) pulses selectively to each pixel of the display using standard twisted-nematic type liquid crystal display drivers. A complex waveform generator provides three-level, three-phase control signals to the supply voltage inputs of the drivers.

Abstract: An input circuit to an active addressed display sequentially switches pixels of video information into high speed sample-and-hold elements which are coupled to corresponding signal lines on the substrate. The pixels of video information are on the signal lines for a complete switching cycle and are transferred to vetical source lines of the display during a time interval equal to the period of a switching cycle.

Abstract: There is provided an automatic door lock control device on a vehicle which includes a first switch operable by a driver, a second switch operable by an occupant other than the driver, and an automatic control device. The automatic control device issues a control command for simultaneous operation of the door lock operation mechanisms associated with the driver and the other occupant upon receipt of a signal from the first switch, and issues a control command for operation of the door lock operation mechanism associated with the other occupant upon receipt of a signal from the second switch. The automatic control device is provided with a predominance determination unit which gives priority to the signal from the first switch over the signal from the second switch to avoid conflicting commands to the door lock operation mechanisms.

Abstract: An active matrix liquid crystal display cell for AC operation including a first field effect transistor switch for switching video information to a first storage capacitor and a second field effect transistor switch for switching the voltage of the first storage capacitor to one side of a liquid crystal cell. The second transistor is connected to be switched on by a common signal, for example, a vertical sync signal, and the top plate voltage applied to the liquid crystal cell is alternated in synchronism with the common signal, resulting in a doubling of the effective potential applied across the liquid crystal cell.

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 photoelectric touch panel comprising arrays of equally spaced light emitting elements and photosensitive elements disposed in a frame configuration on the circumference of a CRT display screen in which a matrix of infrared beams is formed in front of the screen. The photoelectric touch panel has a light shielding plate formed into a comblike shape disposed such that each comb tooth thereof is interposed between said photosensitive elements.

Abstract: A method for clearing unlocking key codes in an electronic locking device in which the unlocking circuit is arranged to be actuated when the code of a magnetic card read by the card reader agrees with an unlocking key code set in the memory, the method comprising using a first clearing card which will function only when the door associated with the locking device is open and a second clearing card which will function only when the door is closed, setting the codes of the first and second clearing cards in specified separate addresses in the memory in the code setting mode for setting the codes of the clearing cards in the processing unit (CPU) of the electronic locking device, determining whether the door is open or closed in the normal operation mode of the CPU, and clearing the unlocking key codes only when the code read by the card reader is identical to the code of the first clearing card set in the above-mentioned manner and the door is open, or when the code read by the card reader is identical to the c

Abstract: Disclosed is a raster operation device including a word boundary checking circuit which operates on a hardware basis to check as to whether the writing of data across the word boundary of frame buffer occurs, basing on the shift width, bit width, etc.

Abstract: A siren detector for detecting siren sounds which precess at known yelp, wail and high-low warble rates within a selected frequency band. A transducer detects siren sounds and produces a corresponding electrical output signal. The output signal is filtered to reject signal frequencies outside the selected frequency band. The signal amplitude is monitored and varied as required to produce a constant amplitude output signal. The constant amplitude output signal is low pass filtered for detection of siren high-low sounds and is also low pass filtered for detection and output of precession signals which pass through a selected center frequency. Subsequent filters are provided for detecting signals which vary at the wail and yelp warble rates. Wail, high-low and yelp warble rate signals output by the various filters respectively trigger wail and yelp clock generators which in turn drive don't walk and red light output flip-flops respectively.

Abstract: An improved graphics display system includes a picture processor for processing display lists defining graphic designs, the display lists comprising pixel data and/or instructions for generating pixel data. The system further includes a display controller which stores pixel data in a frame buffer memory and controls a display of graphic designs in accordance therewith. When a display list defining a graphic design is changed but the design is not to be displayed, the display list is processed by the picture processor, but the output pixel data generated by the picture processor is routed not to the display controller but to a control processor which stores the generated pixel data in a second memory. When the design is thereafter to be displayed, the control processor generates a secondary display list including the pixel data stored in the second memory to the picture processor.

Abstract: A DTMF signal discriminating circuit for a remote control apparatus, the DTMF signals corresponding to a plurality of predetermined operating modes of the apparatus, the apparatus including in OGM signal generating source responsive to an input signal from a remote source for indicating that the apparatus can receive DTMF signals. The DTMF signal discriminating circuit includes a signal coupling circuit for selectively supplying the OGM signal to the remote source and receiving the DTMF signals from the remote source, including a circuit for suppressing the OGM signal for substantially preventing operation of the apparatus in any of the predetermined operating modes in response to receipt of the OGM signal by the signal coupling circuit, a discrimination circuit for receiving the DTMF signals from the signal coupling circuit and a microcomputer responsive to the discrimination circuit for controlling operation of the apparatus in an operating mode corresponding to the received DTMF signals.

Abstract: Mouse emulation includes two modes, a host mode in which the pointer behaves as the pointer of the host system and an emulating mode in which the pointer behaves as the pointer of the target system being emulated. The display of the target system appears in an emulation window within the host system display. The user can switch from host mode to emulating mode by clicking a mouse key when the pointer is located in the emulation window which also serves to make the emulation window the input focus for receiving user input signals from the keyboard. The user can switch from emulating mode to host mode by depressing a STOP key, a keystroke which need not be provided to the emulator because it would not be provided to the target system's CPU. Mouse related data is transferred to the emulator through a data structure in a reserved memory space which a mouse application does not access, such as the BIOS area if an IBM PC is being emulated.

Abstract: A liquid-crystal display device comprising thin-film transistors arrayed in a matrix, wherein each of said thin-film transistors comprises an insulating substrate, a gate electrode disposed on said insulating substrate, a first insulating film covering said gate electrode, an a-Si semiconductor film disposed on said first insulating film, a second insulating film disposed on said a-Si semiconductor film, a p-doped n+-amorphous Si film forming both a source and a drain on said a-Si semiconductor film and said second insulating film, a third insulating film covering said p-doped n+-amorphous Si film, except for a part of said p-doped n+-amorphous Si film, and said a-Si semiconductor film, a source electrode and a drain electrode forming junctions with said part of the p-doped n+-amorphous Si film and covering said third insulating film, and a picture-element electrode, a part of which is superposed on said drain electrode.

Abstract: An image display device in which image data produced by an image scanner separate from the display may be written and erased. The display consists of a movable endless belt. Four embodiments are shown with the belt being made of an electrochromic material which electrochemically shows oxidation-reduction reactions; an optically reversible photochromic material; a thermoplastic sheet produced by applying a photoconductor and a thermoplastic resin to a transparent conductive film; and a color photochromic sheet made up of a photochromic film whose absorption changes when illuminated by light of predetermined wavelengths and a repetitive sequence of color filters of red, green and blue each being formed in a stripe configuration, respectively. Visible images are displayed on the display member based on the image data.

Abstract: A matrix display drive circuit is disclosed which generates multilevel and multiphase, time-variant drive waveforms for driving the rows and columns of a ferrolectric liquid crystal matrix display. The circuit can provide up (write) and down (erase) pulses selectively to each pixel of the display using standard twisted-nematic type liquid crystal display drivers. A complex waveform generator provides multilevel, multiphase control signals to the supply voltage inputs of the drivers. Timing and synchronizing signals are extracted from the graphics data and timing source outputs to allow such multilevel, multiphase signals as may be required for the effective multiplexing of the display matrix.

Abstract: A data converting system converts CRT display data into display data for another display unit such as a liquid crystal display unit by use of a memory. The system includes a data load controller which selects one segment of data out of two segments of data in the CRT display data successively while changing the segment position to be selected alternately in every two frame scanning periods so that the CRT display data for one complete picture is written into the memory in two frame scanning periods, i.e., a segment is written into the memory once for every two adjacent segments. Display data is read out of the memory in the data form conformable to the other display unit.