SU1001159A2 - Symbol forming device - Google Patents

Description

(54) FAMILY FORMULAR DEVICE

This invention relates to automation.

| and computing and can be

used in building devices

display information for example on

Electron Beam Tube (CRT) Screen

According to the main author. St. 805401 a sign-forming device is known, which contains an input register associated with an input to a device input, a clock generator, a character code decoder, code converters along the X and Y coordinates, a block of character length selection, the first inputs of which are connected to the decoder outputs of the code, yes , and the outputs are connected to the inputs of the code converters by the X and Y coordinates, the decoder of the character segment code, the outputs of which are connected to the second inputs of the segment selection block, the clock counter, the outputs of which are connected to the inputs of the decoder to The number of characters, the installation output of which is connected to the input of the zero setting of the clock counter, the output of the clock generator is connected to the counting input of the clock counter, the input register and the clock counter are connected to the control bus 1.

The disadvantage of this device is that, with the help of a cpd, it is not possible to form signs in the form of arrows of the scoreboard or formulas, but only individual signs not related to the group. To form indicators on the screen in the lines of the scoreboard and formulas, you need to have one more additional device that would output the beam on the screen of the radar indicator to the appropriate point where a sign is formed with the help of the forming device, and then the additional device must again move the beam to the starting point of the next character. At the same time, it is necessary to strive for an additional device to form. Such a construction greatly complicates the equipment and laboriousness of the adjustment work.

The purpose of the invention is to increase reliability.

The goal is achieved by the fact that serially connected counters are inserted into the device, the first

25, the input of the first counter is connected to one of the inputs of the code length decoder, the second inputs of the counters are connected to the control bus, and their outputs are connected to the code converters

30 coordinates X and Y respectively.

The drawing shows a structural diagram of the form of the device;

The device contains an input register 1, a decoder 2 character codes, a block 3 for selecting segments, a generator of 4 clock pulses, a counter 5 clock cycles a decoder for 6 segments of characters, a converter of 7 code for X coordinate, a converter of 8 code for coordinate Y, control bus 9, output 10 lights, the first 11 and the second 12 counters.

The device works as follows.

From the character code block, the binary code of the displayed characters on the signal passing through the control bus 9 is written to the input register 1, where it is stored during the formation of the character or several characters when the characters are displayed as lines of formulas or scoreboards, and to the decoder. 2 character codes, in which the binary code is converted into pulses - signs of characters that arrive at the first inputs of block 3 of segments selection. The number of outputs of the decoder 2 characters codes correspond to the number of device data of different characters generated.

The clock pulses of the generator 4 are fed to the counting input of a 5 clock counter, which is controlled by a signal. The scientific research institutes from the control bus 9 coming from the external device are preset to the zero state. Counter 5 counts up to m + 1 pulses, where m is the number of segments from which the displayed characters consist. The bit outputs of the counter -5 are connected to the money encoder 6 segments of characters, which converts a sequence of clock pulses into pulses of segments. An allocated t + 1 pulse sets the counter 5 to the zero state.

The pulses from the decoder of 6 segments of characters (each in its output) are fed to the second inputs of block 3. The selection of segments. According to the sign of the sign coming to the first inputs, block 3 of segment selection selects the desired pulses of the segments and switches to the bit outputs X and Y. The outputs X and Y are connected to the corresponding bits of the converter 7 of the X code and the converter 8 of the Y code.

The selection of segments and switching of their / 10 sign signs for each bit of the code converters 7 and 8 are carried out by the switches included in block 3 of the set of segments of characters. The number of switches is determined by the complexity of the sign and corresponds to the number of bits of transducers 7 and 8 of the code plus one switch that commutes the decoder pulses 6 segments of characters to the backlight (output IQ

The inputs of the switches receive pulses from the decoder of 6 segments of characters, and from the decoder 2 characters - signs of the sign. From the output of the switches, the pulses arrive at the corresponding input of the X and Y code converters. A step voltage of the sign is generated from the code that goes to the bit inputs of the code converters 7 and 8.

To move the beam on the next familiarity using the proposed device, t + 1 output of the decoder 6 segments is simultaneously supplied to the input of the first counter 11. At the first discharge of the counter 11, a high voltage level appears, which is fed to the input of the 8 converter by the Y coordinate An additional voltage appears at the output of which crosses the indicator beam to the next familiarity line, and the process of forming the sign is repeated.

When the line is fully displayed, a pulse is applied from the output of the counter 11 to the input of the counter 12, which at the first discharge of the counter 12 forms a high voltage level. This voltage level is fed to the input of the converter 7 of the code along the X coordinate. At the output of the converter 7, an additional voltage appears, which throws the indicator beam to the next line, and the device repeats.

The use of the invention in radar technology in display devices makes it possible to simplify the indicator device as a whole, since the introduction of two counters into it allows you to exclude a special device that would move the beam on the indicator screen in a row and row by row to increase reliability and greatly simplify adjustment work.

Claims (1)

1. USSR author's certificate No. 805401, cl. G 09 G l / OB, 1977 (prototype).