Abstract: A display apparatus consists of a display memory (VRAM), a data modifier circuit and a display unit at least. The display unit, such as a CRT display unit, has a plurality of display dots which include red, green and blue color dots. The display memory must be cleared at a primary stage and thereafter a plurality of display codes corresponding to only display dots on the outlines of the color image must be written into the display memory. The display codes are converted into display data which indicate red, green and blue color components. The display codes are successively read out from the display memory and supplied to the data modifier circuit wherein the display data are modified so as to compensate the display data which are not written into the display memory. The display unit displays the image corresponding to the modified display data on the screen thereof.

Abstract: A system for searching a predetermined boundary of a closed pattern comprises a memory for storing data of a given closed pattern, and a reading unit for sequentially reading each pair of vertically adjacent words of each pair of vertically adjacent lines of the given closed pattern from the memory in the same reading direction. A search unit receives the pair of vertically adjacent words from the reading unit for searching a boundary in each of the pair of vertically adjacent words and for generating data indicative of a position of a found boundary for each of the pair of vertically adjacent words. A comparison unit receives the boundary position data of the each pair of vertically adjacent words so as to judge in which of the vertically adjacent words the boundary is found earlier than the other. A processing unit coupled to the comparison unit determines whether or not the found boundary is the predetermined boundary.

Abstract: In a pressure-sensitive input apparatus comprising an X-coordinate detection resistive member connected to mutually parallel vertical electrodes and a Y-coordinate detection resistive member connected to mutually parallel horizontal electrodes, for detecting the position of a point depressed by a stylus or the like, by detecting changes in the resistance values of these resistive members, switches are provided for on-off control of the current flowing into or out of both ends of the X-coordinate detection resistive member and the Y-coordinate detection resistive member, and a voltage detection circuit detects the voltage between the X-coordinate detection resistive member and the Y-coordinate detection resistive member. Multiple inputs can be detected according to the results obtained from the voltage detection circuit when the currents are switched by the switches.

Abstract: A hand-controlled mechanism is described for producing signals to move the position of a cursor in a computer display. The mechanism includes a shaft with an elongated axis. A plurality of conductors are wrapped around the shaft and a cylindrical member is mounted for both rotary and lateral movements along the shaft. Signal drivers are provided for applying an energizing signal to a sequence of the conductors. The cylindrical member is provided with conductive plates which overlap a plurality of the conductors, the plates acting to couple an energizing signal applied to one conductor to other conductors which are overlapped by the plates. A decoder senses the coupled energizing signals and provides an output indicative of the position of the cylindrical member to accordingly control a cursor's position. In a preferred embodiment, first and second conductor groups are helically wrapped about the shaft in opposite directions and with orthogonal pitches.

Abstract: An information display apparatus having a plurality of rotatable elements to create a changeable display of information is described. The display apparatus comprises a frame 1 in which are mounted a plurality of rotatable disc-shaped elements 4, each element having two display surfaces 5 and 6 and an array of activators 12. The frame of elements and the activators are moveable relative to one another. By selectively energising the activators 12, one or more of the elements 4 are rotated to alter the displayed information or image. The display apparatus may be arranged as a cylindrical of linear display. Sensors are positioned adjacent the activators (12) to sense the current position of the rotatable elements to decide if they need to be rotated.

Abstract: An automatic message system employs a transducer to provide sound reproduction through a sounding surface which is isolated from the environment, as in museum display cases and the like or in outdoor displays. The sounding surface can be any semicompliant surface, including glass, and the system can be switched by means of a remote sensor which may act through the sounding surface. The device may be removably mounted on the sounding surface by use of suction cups or other devices. The sound reproduction system eliminates conventional speaker diaphragms, which may be damaged by weather or abuse. A stiff inverted cone is used to transmit the sound vibrations from the voice coil of the transducer directly to the sounding surface for amplification.

Abstract: In a display apparatus having an LED dot matrix display unit (16.times.16 LEDs), shift registers, row drivers, a row select driver, etc., since the off-time of driver element (transistors) is relatively long as compared with high-frequency clock (about 15 MHz), LEDs are erroneously turned on. To overcome this problem, when LEDs for a row to be activated are scanned from the first row to the second row, for instance, the row select driver is disabled (LEDs are kept turned off) from when the first row select driver circuit is turned off to when the second last column register driver circuit (15th column register driver circuit) has been perfectly turned off.

Abstract: A keyboard with N-key rollover has a matrix of key columns and lines for successively issuing key codes for depressed keys. When first and second keys on the same column are detected as being depressed and then a third key on the same line as one of the first and second keys is detected as being depressed, or when first and second keys on the same line are detected as being depressed and then a third key on the same column as one of the first and second keys is detected as being depressed, a key code for the third key or a key code for a fourth key detected in error upon depression of the third key are prevented from being issued.

Abstract: A multiple-circuit brake system for motor vehicles in which a multiple-circuit braking value transducer is embodied partially electrically and partially as a pneumatic control valve and is intended for triggering pressure control valves, the wheel brake cylinders being disposed following these pressure control valves. One pressure-medium reservoir is associated with each pressure control valve, and the controlling energy for each of these pressure control valves is drawn from the pressure-medium reservoir associated with that valve. In the pneumatic brake circuit (I), a further pressure-medium reservoir is provided preceding the braking value transducer, as a result of which it is possible, with the aid of two-way check valves, to actuate the wheel brake cylinders with the pneumatic brake circuit (I) whenever the electrical brake circuits (II, III) have failed.

Abstract: A method and apparatus for controlling brake pressure having a brake booster and a pedal-actuated brake valve, in order to effect parallel feeding of the pressure medium fed via the brake valve into a primary main booster chamber. A feed valve is arranged such that displacement volumes in the wheel brake cylinders, in particular, are equalized by means of direct pressure feeding. The triggering of the feed valve is effected based on the result of comparison of travel or pressure variables detected by transducers in the vicinity of the master brake cylinder.

Abstract: A video graphics controller circuit for a personal computers includes a standard, EGA-compatible graphics adapter and a high-resolution companion module. A method is disclosed for configuring the graphics adapter is to generate 2 pixels in parallel in each clock cycle. The companion module serializes the pixels to generate a serial stream of pixels at twice the frequency of the graphics adapter. The companion module can also be configured as a video line driver so that the graphics controller circuit can also run software in standard video modes.

Abstract: In a vertical pre-control circuit for an interface of a multi-synchronization monitor that correlates the one of a computer system and adapter connected to the vertical pre-control circuit to a CRT monitor, the vertical pre-control circuit has first, second and third oscillation sections connected to an output terminal for connection to the CRT monitor, the first, second and third oscillation sections providing, when enabled, respective signals to the output terminal respectively characteristic of the one of the computer system and adapter. First and second logic sections respectively respond to positive waveforms of horizontal and vertical synchronization signals from respective terminals respectively for connection to the one of the computer system and adapter for enabling, respectively, the first and second oscillation sections. A logic controller responds to a specific frequency of the horizontal synchronization signal for overridingly disabling an enabled one of the first and second oscillation sections.

Abstract: A method of filling a polygonal region enables a polygon of any shape to be filled with pixels with a simple algorithm. A display memory area and a working area each having a plurality of addresses correponding to all the pixels on a display screen are provided. A minimum rectangular area including the polygon is determined in accordance with all the polygon vertices, and the minimum rectangular area within the working area is cleared. A straight line (or an edge) connecting each pair of adjoining vertices of the polygon is described to the display memory area with predetermined values. The edges are also described to the working area but in accordance with three rules. Under Rule 1, when a constituent dot of the edge is described to the corresponding address, the data in the address is inverted. Under Rule 2, a start constituent dot of each edge is described only when the edge to be described has an inclination different in polarity from the precedingly described edge.

Abstract: This matrix system and method for displaying graphic characters has a vertical panel with openings arranged in a rectangular array. At each opening is a display disk rotatable 180.degree. in a path between a non-reflective upright forward facing first position, and a light reflective upright forward facing second position. Each disk is turned on a horizontal axis and can be stopped in horizontal position midway in the path of disk rotation by an electromagnetically extensible and retractable stop member. The disks are turned by interaction between an electromagnetically energized magnetic core, and a permanent magnet rotatable with the disk. Lamps behind the disk can project back light through the openings when the disks are in midway positions to display graphic characters. Retraction of the stop members allows selected disks to turn to an upright light reflective position, to display graphic characters by ambient reflected light, while remaining disks provide a light blocking non-reflective background.

Abstract: A display apparatus comprises a plurality of rotationally mounted display elements arranged into a matrix of rows and columns, the axes of rotation of said display elements being perpendicular to each associated column and parallel to each associated row, respectively, said display elements each including first and second display faces perpendicular to one another and joined along respective adjacent edges, for providing a desired arrangement of said display faces at the front of said display apparatus; first and second ramp surfaces are rigidly connected along inside edges of and extending substantially perpendicularly away from a back surface of said first and second faces, respectively, opposite the edges joining said first and second display faces, respectively; and an actuator assembly is mounted for bidirectional movement along a path perpendicular to the planes of rotation of said display elements at the rear of said display apparatus, for stroking selected ones of said first and second ramp surfaces w

Abstract: A graphics display apparatus with a combined bit buffer and character graphics store includes a coded display buffer containing pointers to the store. The store is constituted by odd and even memories used to derive bit patterns for odd and even character cell columns on the display and is partitioned into a font area and a bit buffer area. In a first mode of operation, compatible with existing programmed symbol arrangements, pointers in the coded display buffer in conjunction with odd/even select signals and slice signals derive the bit patterns for each raster scan line of the display. In a second mode of operation, a graphic image to be displayed is stored as a bit map in the bit buffer area: the required bit pattern is derived using slice and odd/even select signals in conjunction with pointers stored in the coded display buffer.

Abstract: A touch controlled display device has, in one embodiment, two displaying segments disposed on the inside of a front cover window in an LCD unit. Further to causing the segments to display different sign information by providing them with different feeds, they are both utilized as sensing means included in a capacitative sensing circuit which is activable by the finger of an operator.

Abstract: In a color display device color elements (17, 18, 19, 21, 22, 23) are built up with the aid of picture cells (2) from juxtaposed rows of picture cells which are driven by line electrodes (3). The resolving power in the horizontal sense is increased by building up the color elements from picture cells of different rows of picture cells. The period t.sub.1 which is required for driving a color element is split up into sub-periods 1/2t.sub.1 during which period samples of the signal to be displayed (length t.sub.o) are presented to the column electrodes (4). Since notably for LCD-TV there applies that t.sub.1 >t.sub.o, these samples can be presented during a period which is longer than 1/2t.sub.o.

Abstract: A system for converting a character font dot pattern includes a peripheral dot detection circuit for detecting peripheral dots of a font pattern stored in a memory and subjects the detected peripheral dot pattern to a conversion operation for converting the dot pattern to a new orientation. The system further includes a paint over circuit which fills in the interior of the converted peripheral dot pattern to complete the conversion process.

Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialized, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialized and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low color definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater color definition.