Abstract: A contrast enhancement device for an LED display is achieved by providing rectangular wire screen of substantially the dimensions of the LED-bearing face of a module block LED array. The edges of the rectangular wire screen are ultrasonically welded to the edges of the LED-bearing face of the module block LED array.

Abstract: The device is a display apparatus which includes an array of tiles. Each tile includes an array of phosphor pixels sealed between an upper sheet of glass and a metallic anode film. Row control gates form an electrode for each row of pixels. Column electrodes are directed to apertures in the row control gates which are positioned under the electrodes. By maintaining the metallic anode film at a high positive potential, and the electrodes at a positive potential, the pixels can be selectively displayed by selectively holding the column electrodes to a zero potential thereby causing electrons to be projected from the column electrode to the metallic anode film.

Abstract: The apparatus is an interface to convert an input analog video signal (real-time) into an output to drive a matrix of light-emitting-diodes. Alternately, a digital video signal can be received, bypassing the analog-to-digital converters. The apparatus is readily configurable to various sizes of matrix sizes and uses a logic board to arrange the data so that low speed components may be used. Two frame buffers alternately receive data in random access order in accordance with the physical and data format of the LED display, and output data by direct memory access methods.

Abstract: The apparatus relates to a display apparatus for a betting parlor associated with a racetrack or Totalizator company, including a display of a large amount of racing and parimutuel data, particularly periodic parimutuel or odds data and the history thereof. Subsequent display portions display fluctuating odds then successively lock as the start of the race approaches.

Abstract: An apparatus for receiving high-speed bursts of input news-type text data and displaying this data on a low-speed LED matrix display is disclosed. The input data is placed into one of two circular input buffers, one buffer is for regular stories and the other buffer is for "flash" or particularly important stories. The stories in the flash buffer are displayed prior to regular stories with several modes of interrupting available. When the contents of the buffers reach a first certain predetermined limit, paragraphs subsequent to the first paragraph of stories are discarded prior to display. Likewise, when the contents of the buffers reach a second certain predetermined limit, all paragraphs of the stories are discarded prior to display and only the headline is displayed.

Abstract: A large scale display is made of several panels, each holding several display elements defined by LEDs. Preferably, each panel is arranged so that it can directly replace, both mechanically and electrically, a panel having incandescent bulbs as display elements.

Abstract: The apparatus is a detachable LED module which is used to display a pixel on a display. The LED module includes a rear wall and side walls. A plurality of LEDs along with a processor with input and output capabilities are contained within the LED module. The rear wall includes an aperture to receive an electrical jack from the display so as to communicate data, power and commands to the LED module. The input and output capabilities of the processors along separate data paths allow modules to be "daisy-chained" together with data intended for a single module to be passed through a succession of modules while commands are monitored from the ribbon cables and power is drawn therefrom.

Abstract: An electronic display unit according to this invention is formed of a plurality of display elements arranged in a two dimensional array. The display elements are selectively activated to generate a message. All the preselected display elements are activated and deactivated simultaneously. The message may be moved vertically or laterally across the array. A memory element is provided for activating each display element. Preferably the information from each memory element is simultaneously shifted laterally to an adjacent memory element while the display elements are disabled.A buffer is provided as an interface between each display element and the corresponding memory element. The intensity of each display element may be controlled by varying the power supply level to the buffer.

Abstract: An automatic teletypewriter is provided. The teletypewriter includes a keyboard having alpha and numeric characters and includes means to utilize the numeric character keys for dialing into the telex network. The teletypewriter also automatically keeps count of the characters generated on each line and generates a carriage return-line feed signal at the end of each line if not directed to do so.