SU938278A1 - Device for displaying alphanumeric data - Google Patents

Description

one

The invention relates to automation and computing, namely, devices for displaying alphanumeric information.

A device for displaying information, made in the form of a device for interfacing an alphanumeric display with a tape recorder, containing an alphanumeric information converter, is connected between the tape recorder and the httpl display.

A disadvantage of the known device is its limited functionality.

The closest to the invention to the technical essence and the achieved effect is a device for displaying alphanumeric information, made in the form of a device for learning, containing a control unit, a memory unit, the first character generator, a video amplifier, a cathode tube, the first scanner, keyboard, unit input-output, recording unit, recording amplifier, e-screener, amplifier-limiter, frequency modulator, synchronizer, and second scanner 21.

However, this device has limited functionality, since it does not allow documenting alphanumeric information, and low reliability of displaying information.

The aim of the invention is to increase the reliability of the display of information.

The goal is achieved.

15 in that a device for displaying alphanumeric information containing serially connected control unit, memory unit 20 connected to an I / O unit, first character generator connected to the control unit, a video amplifier, a cathode tube connected through the first scanner to a control unit connected to a keyboard connected to an I / O unit and connected in series to a synchronizer connected to a second scanner, an amplifier limiter connected to a frequency modulator, a discriminator, a recording amplifier associated with the synchronizer, and a registration unit, the first and second decoders, the first and second counters, and the second character generator, with the first counter connected to the synchronizer, the second counter, the second decoder, and the I / O unit connected to a second decoder connected to a synchronizer connected to a second counter connected to an input / output unit connected to a first decoder connected to a second counter, and to a second character generator connected to synchronization Athor and the frequency modulator. The drawing shows a device for displaying alphanumeric information. The device contains successively connected control unit 1, memory unit 2 connected to input / output unit 3, first character generator 4 connected to control unit 1, video amplifier 5, electron-beam tube 6 connected through the first sweep unit 7 to control unit 1, connected to the keyboard 8 connected to the input-output unit 3 and connected in series to the synchronizer 9 connected to the second sweep unit 10, the limiting amplifier 11 connected to the frequency modulator 12, the discriminator 13, the recording amplifier H, zann th to 9 and synchronizer unit 15 registration. The first counter 16 is connected to the synchronizer 9 | a second counter 17. a second decoder 18 and an input / output unit 3 connected to a second decoder 18 connected to a synchronizer 9 connected to a second counter 17 connected to an input-output unit 3 connected to the first decoder 19 connected to a second counter 17 and to the second character generator 20 connected to the synchronizer 9 and the frequency modulator 12. The device operates as follows. The alphanumeric information, transmitted, for example, from a digital computer or typed directly on the display keyboard 8, is recorded in memory block 2 and using control unit 1, first character generator k, first scan engine 7 and video amplifier 5 is displayed on the screen electron tube tube 6 display. Through the input / output unit 3, the information is printed using a fax machine. To display the information correctly, it is necessary that the speed at which information arrives at the fax machine is equal to the speed at which it is scanned, and the start of the scan occurs simultaneously with the start of the first character of the display screen string, i.e. must be synchronized. Clocking the receipt of information in the facsimile machine is achieved by issuing from the synchronizer 9 signals the beginning of the line and the frequency of the cycles. The source of these signals is the synchronous motor of the second sweep unit 1, whose rotational speed depends on the frequency of the supply voltage. The start of line signal, coming from the first output of the synchronizer 9 to the first input of the second counter 17, sets it to the initial zero state and allows it to count clock signals from the second output of the synchronizer 9 to its second input. Signal The frequency of clocks clocks the transmission of signals corresponding to the raster points. The second counter 17 divides the clock frequency by the number determined by the number of dots in the raster line of one character horizontally with another two positions per interval between characters. The second counter 17 is made in the form of a counter for seven (i.e., five points and two intervals) and outputs the next sign to the third input of the I / O unit. The start of line signal arriving at the second input of the first counter 16 increases its state by one. The first counter 16 divides the frequency of the signals The beginning of the line by the number determined by the number of points in the raster of one character vertically, taking into account the three empty lines allocated to the line spacing. The first counter 16 is designed in the form of a counter for ten (i.e. seven lines and three intervals).

The initial setting (reset to O) of the first counter 16 is effected by a signal from the first output of the I / O unit 3 at the initial start of the print mode.

At the same time, the start of the string is sent to the second input of the second decoder 18, which synchronizes the output from its first and second outputs of the signals (after the first counter 1b is set to 10) or Repeat the block (in all other states): Signal A new block arriving at the first input of block 3 I / O causes the output at its second output of the next block (character string) of the display screen. The signal Repeat 5 blocks causes the repeated output to the second output of block 3 I / O of the previously transmitted block (character strings of the screen).

The clock frequency received from the second output of the synchronizer 9 to the second input of the second character generator 20 synchronizes its operation, which consists in converting the codes of the signals arriving at its first input and at the input of the first decoder 15 from the second output of the input-output block 3 to points raster corresponding to the characters of the alphabet. The change of the code combination at the second output of the I / O unit 3 occurs in response to the signal. The next sign from the output of the second counter 17 is generated every time after counting seven clock ticks.

The service character codes are decrypted by the first decoder 19 and block the output of the next signal by the second counter 17 by applying to its third input a inhibitory signal when the input 3 unit issues service signals, for example, End of block or End of text. In this case, the second character generator 20 produces signals corresponding to the preg:. setting the Space character. The resumption of the operation of the second counter 17 is effected upon receipt of the first input of the next signal at the beginning of the line.

From the second character generator 20, signals are fed to a frequency modulator 12, which generates black or white frequency signals. the floor, depending on whether or not a point of the encoded character is transmitted on a given cycle. The received frequency-modulated signal is fed to limiting amplifier 11, amplified and fed to synchronizer 9 to control the presence of an input signal on the discriminator 13. In the absence of an input signal within one second, which is indicated by

S about the termination of the transmission of information or about the violation of communication, the synchronization of the synchronization signals by the synchronizer 9 is stopped and the fax machine is turned off.

0 In the discriminator 13, consisting of the full-wave differentiation circuit of the one-shot and the low-pass filter (LPF), the input signal is differentiated. The resulting differentiated pulses trigger a single vibrator, which converts the frequency-modulated signal into a frequency-pulse-modulated signal, from which the low-pass filter extracts the modulating signal (video signal).

The recording amplifier is designed to amplify the video signal input to the recording unit 15, for example, a recorder.

The recording unit 15 is an electromagnetic type recording device. It records the received information on a paper form located 10 times in the second block.

The recording amplifier k has an additional input from the synchronizer 9 intended to raise the writing element of the recording unit 15 during the start-up of the apparatus and during the passage of the junction of paper on the drum.

As information arrives, the recorder begins to move along the axis of the rotating drum of the scanner unit 10, as a result of which each character string received from memory unit 2 is represented as ten raster lines on a paper form.

Claims (2)

The proposed device allows displaying alphanumeric information on a display screen and printing it on paper on a fax machine. It allows you to display alphanumeric information on an existing phototelegraphic network without retrofitting telegraphic and phototelegraphic technical means. The device can be used in automated control systems for documenting alphanumeric information. An apparatus for displaying alphanumeric information comprising a serially connected control unit, a memory unit connected to an I / O unit, a first character generator connected to the control unit, a video amplifier, an electro-trap tube I connected through the first scanner unit to the control unit, connected to a keyboard connected to an I / O unit, serially connected synchronizer connected to a second scanner, limiting amplifier -. 8B associated with a frequency modulator, a discriminator, a recording amplifier associated with a synchronizer, and a recording unit, from l. : and in order to increase the reliability of the information display, the first and second decoders, the first and second counters and the second character generator are entered into it, the first counter being connected to the synchronizer, the second counter, the second decoder and the I / O unit connected to a second decoder connected to a synchronizer connected to a second counter connected to an input / output unit connected to a first decoder connected to a second counter, and to a second character generator connected to a synchronizer and frequency modulator. Sources of information taken into account in the examination 1. US patent number 3872i 60, cl. C 0-32, pub. 1975. 2. USSR author's certificate number 553650, cl. G 09 B 5/06, 1977 (prototype).