Abstract: Device for a digital video screen comprising one or more printed circuit substrates on which are mounted one or more integrated circuits covered by a one-piece display surface. The display surface is covered by one or more luminous substances that are excited by the integrated circuits placed underneath. A video screen is formed where each subpixel is composed of a certain number of basic luminous units activated or deactivated by electrical switches on logic controls. Binary words are applied on the logic controls, and correspond to values of desired colors for each sub-pixel in such a way that the image refresh rate is independent of the loading rate, the rate of change, the resolution of the displayed image and the dimension of the video screen.

Abstract: Device for a digital video screen comprising one or more printed circuit substrates on which are mounted one or more integrated circuits covered by a one-piece display surface. The display surface is covered by one or more luminous substances that are excited by the integrated circuits placed underneath. A video screen is formed where each subpixel is composed of a certain number of basic luminous units activated or deactivated by electrical switches on logic controls. Binary words are applied on the logic controls, and correspond to values of desired colors for each sub-pixel in such a way that the image refresh rate is independent of the loading rate, the rate of change, the resolution of the displayed image and the dimension of the video screen.

Abstract: In a method of converting an analog input signal to a digital output signal, an analog input voltage is compared with two reference magnitudes which are invariable during the comparing. Both reference magnitudes are derived from an analog signal provided in a previous comparison by adding and subtracting a fixed magnitude representing a quantization step. Both reference magnitudes are simultaneously varied by increments or decrements equal to the steps when the analog input voltage is equal to one or the other of the reference magnitudes. Upon each variation, a pulse is emitted having a plus sign or a minus sign according to whether the analog input voltage reaches one or the other of the reference magnitudes. The number of pulses emitted is algebraically totalled thereby providing a digital indication of the mangitude of the analog input voltage.

Abstract: The pressure-measuring device comprises a first chamber subjected to the pressure to be measured and a second chamber connected to the first through an opening fitted with a valve. The device further comprises a valve-control circuit and an element for detecting the instants at which the pressure difference between the two chambers attains a predetermined increment or decrement or a zero value. The detection element consists of a deformable pressure-tight wall placed between the two chambers and adapted to produce action on an optoelectronic, piezoelectric or electromechanical element which converts the deformation directly to logical signals. A bidirectional counter is provided for forward or backward counting of the increments and decrements obtained.

Abstract: A pressure-measuring device which operates in digital representation comprises:a first chamber subjected to the pressure to be measured;a second chamber subjected to a reference pressure and connected to the first chamber through at least one opening fitted with a valve;a device for measuring the difference both in magnitude and in sign between the pressures prevailing respectively within the first and second chambers, said device being intended to deliver an electrical signal which is a function of said difference;a circuit for detecting the instants at which said difference attains a predetermined increment +.DELTA.P or a predetermined decrement -.DELTA.P and for detecting instants at which said difference becomes zero;an element connected to said circuit for initiating the opening of the valve or valves when the difference attains the values .+-..DELTA.