SU1068979A1 - Device for displaying information on crt screen - Google Patents

Abstract

DEVICE FOR DISPLAYING INFORMATION ON THE SCREEN ELECTRONIC TUBE containing the shaper code of the beam deflection, one of the inputs of which is the input of the device, and the output is connected to the first input of the first converter-current, the outputs of which are connected respectively to one of the inputs of the integrated amplifiers whose outputs connected to deflection coils of the cathode-ray tube, and a series-connected reference frequency generator, a counter and a demi-grater, the first output of which is connected to another input of the pho The world of the beam deflection code, the second output of the decoder is connected to the second input 4 of the first encoder converter, characterized in that, in order to improve the accuracy of the device, it contains serially connected register, code converter and second code-current converter, the register inputs are connected respectively to the driver output beam deflection code and the third output of the decoder, the second input of the second code-current converter is connected to the second output of the decoder. outputs of the second code-current converter | connected respectively to other inputs of the integrating amplifiers. about: eo with so

Description

The invention relates to computing and automation and can be used in information display devices on a cathode ray tube (CRT) screen. A device is known for displaying NIN information on a CRT screen, in which stabilization of the spot position on the screen is achieved due to the optical system Q with code masks tlT. The disadvantages of this device are the complexity of the stabilization system and the low accuracy of the spot position on the screen. Closest to the invention is a device for displaying information on a CRT screen, containing a series-connected generator, counter, descrambler, keys, summing amplifiers connected to the same inputs, which are connected to the half-windings of the deflecting coil through the deflection amplifiers, of the beam deflection symbol, performing the function of a digital-to-analog converter, the outputs of which are connected to the second inputs of summing amplifiers via the keys and elements of the AND and the source of the reference voltage p, the output of which is connected to the semi-windings, CRT f2j. A disadvantage of the known device is the low accuracy of the stabilization of the position of the beam for various deviations of the beam at different points of the screen. The introduction of compensation for residual inductance F by applying a voltage opposite in sign to a previous deviation of 2% of the maximum possible value cannot ensure full compensation of Fost in the coils of the deflecting system. The aim of the invention is to improve the accuracy of the information display device. This goal is achieved by the fact that a device for displaying information on a CRT screen containing a beam deflection code generator, one of the inputs of which is the device input, and an output connected to the first input of the first code-current converter, whose outputs are connected respectively to one of the integrating inputs amplifiers, the outputs of which are connected to the deflection of the CRT coils, and the series-connected reference frequency generator, the counter and the decoder, the first output of which is connected to another input of the Along the beam deflection code, the second output of the decoder is connected to the second input of the first code-current converter, serially connected register, code converter and second code converter are entered, register inputs are connected to the output of the beam deflection code generator and the third output of the decoder, the second input of the second converter code, respectively -to-k is connected to the second output of the decoder, the outputs of the second code-to-current converter are connected respectively to other inputs of the integrating amplifiers. Figure 1 presents the block diagram of the proposed device in figure 2 is a diagram of the operation of the decoder device. The device contains a reference frequency generator 1, a counter 2, a decoder 3, a shaper of a otklepleniya code of the beam of the first converter 5 code-current, integrating amplifiers 6-9 of the CRT 10, deflection coils 11 of the CRT, a register 12, a converter of 13 codes, the second converter 14 code -current. The device works as follows. At the first input of the imaging unit 4, the beam deflection code arrives, the information to be imaged. Information codes are written to shaper 4 of the beam deflection code by clock pulses T (Fig. 2), which are generated by decoder 3, from the output of shaper 4 of the beam deflection code, digital information is fed to the input of the first code-to-current converter 5, the second input of which is from the decoder output 3 enters the strobe sweep (figure 2). From the output of the first converter 5, the code-current analog information is fed to one of the inputs of the integrating amplifier1 7-6 and then to the deflection coils 11 of the CRT 10. Clock pulses Tj ((FIG)) from the third output of the decoder 3 following the sweep strobe are recorded the beam deflection code from the output of the shaper of the beam deflection code 4 to the register 12, from the output of which the deflection code enters the code converter 13, in which the beam deflection code is converted to the corresponding deflection compensation code xx. The beam deflection code is established experimentally for each specific deflection system and SLT and is programmatically entered into the code converter 13. The code for the deviation compensation from the output of the code converter 13 is fed to the input of the second code-current converter 14, to the second input of which the sweep strobe from the output of the deschifter 3. The currents of the compensating deviation from the output of the second transducer 14 code-current post. Go to the second inputs

3 10689794

the corresponding twiddle integrate usi-Utilization and the equipotent allowances 6–9, where they sum up from the current-lit to greatly improve the accuracy

mi deviations in coordinates of the display of information on the screen of a CRT,

the beam, providing compensation with an appropriate choice of the electrostatic beam deflection in the compensation elements, allows

value from the magnitude and sign of the deviation-5 to bring the error of the Inni ray display in the previous clock cycle closer to zero.

St {yu5 sweep

Claims (1)

A DEVICE FOR DISPLAYING INFORMATION ON THE ELECTRON BEAM TUBE SCREEN, comprising a beam deflection code generator, one of whose inputs is the input of the device, and the output is connected to the first input of the first col-current converter, the outputs of which are connected respectively to the same inputs of integrating amplifiers _; the passages of which are connected to the deflecting coils of the cathode ray tube, and the reference frequency generator, a counter and a decoder, the first output of which is connected to another input of the beam deflection code generator, and the second decoder output is connected to the second input of the first codec converter, characterized in that , in order to improve the accuracy of the device, it contains a series-connected register, a code converter and a second code-current converter, the register inputs are connected respectively to the output a beam deviation code generator and a third decoder output, the second input of the second code-current converter is connected to the second decoder output. ” / L outputs of the second code-current converter are connected respectively to other inputs of integrating amplifiers. FMV.1