SU798793A1 - Device for displaying information on crt screen - Google Patents

Description

one

The invention relates to automation and computing and can be used to quickly output information from computers to a CRT screen in order to display it in graphical form.

Devices for displaying graphical information on a CRT screen are known, including a control unit, a buffer memory unit interconnected with it, an electron beam tube, and a voltage control unit forming a control beam.

The closest technical solution is a device consisting of a computing unit, a symbol generator, a Vectro-Roa generator, a rotation unit, and voltage drivers p.

The main disadvantage of these devices lies in the complexity of their circuit construction, and the degree of complexity is determined both by the volume of the selected alphabet and the magnitude of the angular error, which is necessary: to ensure the rotation of characters. : In addition, the use of three autonomous units — a generator of a simulated wedge, a generator of vectors, and a rotation unit — makes the control unit, which is included in the computing unit, much more difficult.

The purpose of the invention is to simplify the construction of the device, reduce its weight and size indicators and increase reliability.

The goal is achieved by the fact that the functions of the three blocks listed are combined into one consisting of three registers, a trigger, a code-time interval converter, two code-voltage converters, and an AND element, with the inputs of two registers connected to the corresponding outputs of the computing unit, and the outputs are connected to the second inputs of the corresponding voltage drivers via the corresponding code-voltage converters, the inputs of the third register are connected to the corresponding outputs of the computational circuit a, and outputs to podKJBocheny vhodamPreobrazovatel code-time interval, the first vy5 turn is connected to the inputs of registers, and trigger the computing bgoka, whose other inputs are connected to outputs of the computing unit, and an output connected to the input

Claims (2)

0 element And, the second input of which is connected to the second output of the code-time interval. The drawing shows a block diagram of the device. It consists of registering 2, 3 and 4 computing unit, trigger 5, code-time interval converter 6, code-voltage converters 7 and 8, and formers. voltage 9: K 10, element AND 1 The device operates as follows. Under the influence of the control signal generated in the computing unit 1 and fed through the bus a, the registers 2, 3 and 4 and the trigger 5 are reset to zero. Under the influence of a control signal, the code of the first part of the displayed symbol is written to register 2 via bus c, the code of projection of this section to the axis, X, is written to register 3 via bus d, and the projection code of this section 4 plot on the y-axis, in trigger 5 on the f bus - the attribute highlighted in this plot in the symbol generator. The contents of register 2 in time-domain converter 6 are converted to rectangular im-. pulse, the duration of which is proportional to the length of the reproduced segment. The contents of registers 3 and 4 in code-voltage converters 7 and 8 are converted to voltages, the values of which are respectively proportional to the projections of the reproduced segment on the x and y axes. At the moment of the pulse termination, from below the potential output of the converter 6, a short pulse is removed from its dynamic output, which arrives at the inputs of registers 2, 3 and 4 and trigger 5 and resets them to zero. This achieves the formation at output of transducers 7 and 8 of not stresses, but rectangular pulses, the duration of which is proportional to the length of the reproduced portion of the generatrix of the symbol, and the amplitude corresponding to the projections of this portion on the henna axis. Under the influence of these pulses, voltage formers 9 and 10 produce voltages iu (1) and 11 (t changes linearly, and under the influence of the sequence, the input impulse - according to the law of piece-linear approximation. These voltages are applied to the sign of the deviation of the system The CRT and the trace of the electron beam in the plane of the screen move along the generator of this section of the symbol or curve.If the section to be formed enters the generator of the symbol, then a rectangular impulse is removed from the output of trigger 5, and The user 6 passes through the Element-A and J / J and is supplied to the control electrode of the EPT, which provides illumination of its beam. A short pulse from the dynamic output of the converter 6 is supplied to the computing unit, informing it of the end of the process of displaying a given symbol or curve. the process of forming voltages for the second section, etc., to the last. After the display of the last section in the generator of the symbol or curve to the input of the formers 9 and 10 via the bus W from the computing unit As 1 receives a signal that brings the drivers to their original state. The proposed device allows displaying any graphical elements of the information models, as well. as well as the well-known, but by means of one simple device and circuit design of the block, and not three blocks, the circuit solution of which is very difficult. Apparatus of the Invention A device for displaying information on a screen of a cathode ray tube (CRT), comprising a computing unit and two voltage drivers, the first inputs of which are connected to the control output of the computing unit, and the outlets with a deflection system of the electron beam tube, characterized in that simplify and increase the reliability of the device; three registers, a trigger, a code-time interval converter, two code-voltage converters and an AND element are entered into it, with the inputs of two registers connected The code-voltage converters are connected to the second inputs of the corresponding voltage drivers, the inputs of the third register are connected to the corresponding outputs of the computing block, and the outputs are connected to the inputs of the code-time converter, the first output of which is connected to the inputs of the registers of the computing unit and the trigger, the remaining inputs of which are connected to the outputs of the computing unit, and the output is connected to the input of the AND element, Torah input coupled to the second output of the code-time-interval. Sources of information taken into account in the examination 1.Television methods and display systems. Subtitled MI Krivosheeva, M., Soviet Radio, 1975. 2.Kostiuk V. and., Lodakov V. Ye. Information display systems and engineering psychologists. Vishcha school, 1977, p. 116 (proto-; type).