Abstract:
Apparatus for displaying patterns on an enlarged or reduced scale comprising a cathode ray tube including a cathode electrode, a plurality of matrix electrodes arranged in a matrix, a fluorescent screen, focusing means and deflection means which are disposed between the matrix electrode and the fluorescent screen; a pattern memory connected to the matrix electrodes for storing the patterns of letters, digits, symbols, etc. to be displayed; a memory for supplying an enlargement or reduction signal and a position designation signal of the information of the pattern to be displayed; an enlargement-reduction control connected to the supply memory for controlling the potential applied to the focusing means in accordance with the enlargement or reduction signal supplied from the memory; and a position designator connected to the memory for converting the position designation signal into an analogue signal and for applying the analogue signal to the deflecting means, whereby said focusing means operates to enlarge or reduce the pattern displayed on the fluorescent screen in accordance with the enlargement or reduction signal supplied from the memory and said position designator operates to position said pattern on said screen.
Abstract:
In a fluorescent display tube of the type comprising an insulator base having a plurality of recesses on one surface thereof which are disposed to form selected patterns to be displayed, a phosphor segment and an electrode contained in each recess and a source of electrons for impinging electrons upon the phosphor elements to cause them to luminesce there is provided a relatively low resistance path directly on the surface of the insulator base for draining electrons impinging upon the surface thereof.
Abstract:
In a switching circuit connected between a letter selecting circuit and a luminescent letter display tube there is provided a transistor for each anode electrode of the display tube. The base electrode of the transistor is qrounded, the emitter electrode is suitably biased, the collector electrode is connected to the anode electrode and the control signal is applied to the emitter electrode.
Abstract:
In a direct-heated cathode electrode for use in electron guns wherein a heating element is mounted on a base to heat a cathode pellet which emits thermoions, a cathode shield maintained at the same potential as the heating element is disposed between the same and the base.
Abstract:
A weighing machine with a digital display including a converter which responds to the body weight and generates digital signals, and electrical circuits which respond to the digital signals and generate signals actuating a display tube only when receiving a specific digital signal from the converter whereby a high stability is attained in the indication of the display.
Abstract:
In an electronic digital clock wherein letters representing the time and a symbol PM or AM are displayed by luminous display tubes driven by an electronic driving circuit, the brightness of the luminous display tubes is varied by a photoelectric element responsive to the brightness of the ambient light.
Abstract:
In a body weight measuring device of the type wherein the body weight is displayed by digital display tubes, the display tubes and a source switch are combined into a display unit which is connected to the weight measuring device through an electric cable.