SU758136A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to computing and can be used to display information from sources of information on the screen of the electron beam tube (CRT).

A device for displaying information is known, comprising a control unit connected to a voltage-time interval converter, a computing unit, connected to a voltage converter in a sequence, pulses connected to reversible counters, drivers of stepped functions connected to a sawtooth voltage generator, block of logic elements

The disadvantage of the known device is not a high accuracy of image formation.

* -The closest in technical essence to this invention is a device containing a block of buffer memory, the inputs of which are- *

are the inputs of the device, the first and second code-frequency converters, the first inputs of which are connected to the first outputs of the buffer memory block, the first reversible counter,

2

the pulse input of which is connected to the output of the first code-frequency converter, and the output to the input of the video signal conditioning unit,

5 connected to electron beam ·

handset, and clock generator and.

A disadvantage of this device is the low image quality.

The purpose of the invention is to improve the quality of the image when forming the displacement figures.

This is achieved by the fact that the device containing the block of buffer memory, the inputs of which are the inputs of the device, the first and second code-frequency converters, the first inputs of which are connected to the first outputs of the block of buffer memory, the first reversible counter, the pulse input of which is connected to the output the first code-frequency converter, and the output to the input of a video signal conditioning unit connected to a cathode ray tube, and a clock generator, a second reversible counter and a pulse signal generation unit are introduced 30 cash, the input of which is connected to

3

758136

the output of the clock generator, and the outputs to the second inputs of the code-frequency converters, the pulse input of the second reversible counter is connected to the output of the second code-frequency converter, and its installation inputs to the second outputs of the buffer memory unit, while the outputs of the second reversible counter are connected to the installation inputs of the first reversible counter.

The drawing shows a diagram of the device.

The device contains a generator 1 _; clock pulses, block 2 of formation of pulse signals, block 3 of buffer memory, converters 4,

5 code-frequency, reversible counters 6.7, block 8 of the formation of a video signal ^{1 of the} channel.

Positions 9-11 designate the device inputs, and position 12 denotes the output of the video signal conditioning unit connected to the CRT (not shown).

The device works as follows.

The pulses from the generator output 1 clock pulses with a frequency fed to the input of the block 2 of the formation of pulse signals, which produces a series of pulses with repetition frequencies _τ / α. , $ _t / 1 ^g , ί _τ / 2. ³ , .... s,, ^ / 2.,

.... ~ lowercase frequency

sweep).

Pulses with frequencies that are multiples of ίο are fed to the code-frequency converter 4, and pulses with frequencies that are multiples of ίγ are sent to the code-frequency converter 5, which convert codes from block 3 of the buffer memory into pulse repetition frequencies. The output signal from the inverter 4 is a sequence of pulses verti-. scaling discretization. This sequence of pulses is fed to the input of the reversible counter 6, in which the code from block 3 is preliminarily (during the retraction of the sweep across the frame), which determines the displacement of the displacement pattern on the screen of the television indicator. The signal from the output of the converter 5 is a sequence of horizontal sampling pulses, which is fed to the input of the revision counter 7, into which the code from the reversing counter is written (at the time of the reverse sweep along the line)

6. From the output of the senior level of the reversible counter 7, the signal is given

to the input of the video signal conditioning unit 8.

If the code Y, coming from block 3 to converter 5, is equal to zero, then on the screen of a CRT there is a vertical displacement pattern. When code X is zero, coming from block 3 to the input of converter 5, on the CRT screen there is a horizontal displacement pattern. With nonzero Xi Y codes, an oblique extrusion pattern is formed, the slope of which is proportional to the ratio of the X code to the Y code.

Claims (1)

Claim A device for displaying information on the screen of a cathode-ray tube containing a block of buffer memory whose inputs are the inputs of the device, the first and second code-frequency converters, the first inputs of which are connected to the first outputs of the block of buffer memory, the first reversible counter whose pulse input is connected to the output the first code-frequency converter, and the output — to the input of a video signal conditioning unit connected to a cathode-ray tube, and a clock pulse generator, which is distinguished by the fact that image quality, a second reversible counter and a block forming pulse signals, whose input is connected to the output of the clock pulse generator, are entered into the device, and the outputs are connected to the second inputs of the code-frequency transducers, the pulse input of the second reversible counter is connected to the output the second converter is code-frequency, and its setup inputs are with the second outputs of the buffer memory block, while the outputs of the second reversible counter are connected to the installation inputs of the first reversing counter.