SU41027A1 - A device for receiving vision - Google Patents

Description

The present invention relates to a device for receiving vision with a cathode tube using a fluorescent screen for imaging.

According to the invention, said cathode tube is provided with an additional electrode, a non-conductive grid, on which modulated far-vision signals create an electrical image in order to modulate a constant electron flow from an additional ring-shaped cathode to the anode, on which a fluorescent layer is on the shaft.

In order to periodically destroy the charges of the electrical image, before the reception of each frame, a relaxation generator is applied, the discharge current of which creates a reverse power. d. between the conducting grid and the additional cathode.

The positive charges forming on the grid 1 an electric image are applied by the cathode beam from the cathode 2. The intensity of the beam is controlled by the electrode 3, to which the voltage of the far-vision signals is applied. Accelerating voltage is applied to the anode 4 and the conductive grid 5, which is integral with the non-conductive grid 1. The latter can be accomplished, for example, by covering the conductive filaments with a layer of quartz or another non-conductor.

The scanning system consists of two pairs of capacitor plates 6, 7.

The nonconductive grid 1 serves, as already mentioned, to modulate a constant electron flux between the ring-shaped incandescent cathode 8 and the fluorescent screen 9.

During normal operation, the voltage of the batteries 10, I, 12 is chosen such that the current from the cathode 8 to the grid 1 does not pass, and the secondary current from the grid i is greater than the electron beam current causing it. When the beam moves along grid 1 at a constant speed, it creates positive charges on it, which are proportional to its instantaneous intensity, generated by the foresight signals.

When the beam moves along grid 1, its elements receive positive charges and transmit a constant electron flux from cathode 8 to fluorescent anode 9 in accordance with their potentials. Before applying the new, corresponding to the next frame of the electrical image on the non-conducting grid i, it is necessary

destroy the old image on him; This is accomplished by periodically impulsively increasing the potentials of Ctode 2 and Electrode 3 at constant potentials of the remaining electrodes.

The constant voltage on Grid 1 and the luminance of the screen are regulated by the change in the constant negative voltage supplied by the battery 17 to the electrode 3. To eliminate the effect of the change in the constant voltage on the grid 1 on the integral illumination of the screen 9, a stabilizing circuit can be included in its circuit resistance 18.

The subject matter of the invention.

Claims (2)

1. A device for receiving vision with a cathode tube, characterized in that the modulated far-vision signals create an electrical image on a non-conductive grid placed in front of the fluorescent screen in order to modulate the constant electron flow from the heated cathode in the form of a ring to the anode on which the fluorescent screen is applied. 2. Use in the device according to claim 1 of a relaxation generator, the discharge current of which creates reverse e. d. between . conductive grid 5 and cathode 8, in order to destroy charges on the non-conductive grid I.