SU1014009A2 - Character forming device - Google Patents

Abstract

1. A CONSTRUCTIVE DEVICE according to the author. St. N 805401, from. lichatia-; so that, in order to increase the speed of the formation of the characters, a block for the end of the character has been inserted into it, only the inputs of the. Secondly, they are connected to the outputs of the character code decoder, and the other inputs are connected to the outputs of the decoding unit, the first output of the end of the character is connected to the control input of the register and the control input, and the second output is connected to the input of the synchronization unit. / ff

Description

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2. The device according to claim 1, characterized in that the block at the end of the characters contains a group of elements OR whose outputs are connected to one of the inputs of the corresponding AND elements whose outputs are connected to the inputs of the OR element whose output is connected to the reset pulse shaper output which is the first output of the block and is connected to the input of the delay element, the output of which is the second output of the block, and the inputs of the OR elements of the group are one of the inputs of the block, the second inputs of the AND elements are the other inputs of the block.

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The invention relates to automation and computing and can be used in the construction of display devices, for example, on a screen of a cathode ray tube (CRT).

: According to the main author. St. N ° 805401 is known a sign-forming device containing an input register connected to the input of the device, a clock generator, a decipher of the character code, code converters according to the X and Y coordinates, a block for selecting character segments, the first inputs of which are connected to the outputs of the character code decryptor, and the outputs are connected to the inputs of the code converters by the X and Y coordinates, the decryptor of the character segment code, the outputs of which are connected to the second inputs of the segment selection block, the cycle counter, the outputs of which are connected to the code decoder inputs zkov characters, install the output of which is connected to the zero setting input of the counter cycles, cycles of the generator output is connected to counting input of the counter. clock cycles, the input register and clock counter are connected to the control bus. . The block for selecting character segments contains AND and OR elements, the first inputs of the corresponding AND elements being connected to the outputs of one of the OR elements, their second inputs to the first inputs of the block, the inputs of one of the OR elements connected to the second inputs of the block, the outputs of the AND elements connected to the inputs of other OR elements, the outputs of which are connected to the corresponding outputs of block 1. . However, when forming characters using a known device, the number of segments from which the character is formed is always chosen to be constant and equal to the number of segments of the most complex, longest character.

. The time spent for the formation of the sign is determined by the most complex sign, for example, the letter Yu.CH.YY can be formed 20. segments, and the frequency of repetition of cycles, for example, 2 MHz, while the duration of one

The segment will be equal to 0.5 μs. With these data, the formation time of any character is 10 MKS. In this case, simpler characters, for example, iVMp Figures 1, 7, the letters G, P, C, can be formed with 4-8 cuts, but the device is not. allows you to generate simple signs in a shorter time, i.e., both simple and complex signs are formed in 10 µs.

Modern indicators of radar systems are required to increase the speed of displaying characters, since the amount of information displayed increases all the time, and in order for the displayed information not to flicker, its repetition time must be 40-50 Hz, i.e. it remains constant. Therefore, in order to satisfy the requirements for modern indicators of radar systems, it is necessary to shorten the display time of one character,. i.e., it is necessary to increase the speed of an erpaformer.

The purpose of the invention is to increase the speed of formation of simple sHaKOB while maintaining the speed of formation of the most complex sign.

The goal is achieved by introducing a block of the end of the sign into the sign-forming device, some inputs of which are connected to the outputs of the decoder of the sign code, and other inputs to the outputs of the decider of the sign segments are connected to the control input of the register and the control input of the clock counters, and the second output to the input of the synchronization unit. .

Moreover, the character end selection block contains a group of OR elements, the outputs of which are connected to one of the inputs of the corresponding AND elements, the outputs of which are connected to the inputs of the OR element, the output of which is connected to the reset pulse shaper, the output of which is the first output of the block and connected to the input of the delay element The output of which is second and the inputs of the elements of the OR group are one of the inputs of the block, the second inputs of the elements of AND are the other inputs of the block.

FIG. 1 shows a block diagram of an assumed sign-forming device; in fig. 2 - block diagram is functional; 5 ends of characters ends are ..

The device contains an input regulator 1, a decoder 2 character codes, a block 3 for selecting segments, a generator of 4 clock pulses, a counter for 5 clock cycles, a decoder for 6 segments, and pre6b 10 a converter for 7 codes along the X coordinate, pre-; Creator 8 of the code according to the Y coordinate, control bus 9, illumination output 10, block end of the end of characters, group of elements OR 12, group of elements AND 13, element OR 14, 15 shaper 15 of the reset pulse and element 16 of the delay ..

The device works as follows.

From the code block of characters (not shown) the binary, the code of displayed characters on the signal coming through the control bus 9 is written to the input register 1, where it is stored for the time of the formation of the character, and fed to the decoder 2 of the character code. In the decoder

2 codes of characters the code is converted into pulses 2S signs of characters, which arrive at the first inputs of block 3 of the selection of segments and the block for the selection of the end of characters. The number of outputs of the decoder 2 code line corresponds to. the number of junction times generated by the device

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The clock pulses of the generator 4 are fed to the counting input of the counter 5 cycles, which

the control signal from the control bus 9 is preset to the zero state, Counter 5 counts up to m + 1 pulses, where m is the number of time segments of the most complex sign. The bit outputs of counter 5 are connected to a decoder of 6 segments, which converts; sequence of clock pulses: in the pulses of time intervals.

Impulses from the decoder 6 segments, kaishch

Dyy on their way out, come to the second. inputs of block 3 of the selection of segments and block 11 of the selection of the end of characters. By the sign of the sign, coming to one of the first inputs, the block

3 selection of segments selects the desired pulses of the segments and switches to the corresponding output bit outputs X and Y.

In the {7 and 8 code converters, at each instant of time a voltage is generated which controls the beam of the EDT.

In block 11, the selection of the end of the sign, each sign of the sign goes to one of the K elements,

com or 12, and; signs of characters consisting of the same number of time intervals are combined on the same element OR 12, for example, the number 8 and the letter B consist of 12 time intervals, therefore. The attributes that come from the decoder 2 of the character code are combined on the same element OR 12. The shortest, simplest sign in the particular case is the digit 1 and the letter G, which contain 6 time intervals. Their signs are combined on the nth element OR 12.

The longest sign will be the letters S and W. They contain 20 time intervals and are combined on the mth element OR 12. The number of OR 12 elements in the end-selection block is K – m, de m is the number of time segments itself, sign, n is the number of time intervals; the simplest mark. From the output of the OR elements, 12 signs of the characters arrive at the first inputs of the I: 13 elements, the second inputs of which from the decoder 6 receive the time intervals with which the characters end.

When a sign coincides with the sign on the AND 13 elements, the pulses corresponding to the time of the dead segments arrive at the element OR 14, from whose output -t to the formation-. 15 pulse reset. The micro pulse 134HLZ circuit is used as a form: the reset pulse rotator. Thus, the pulse of the last time period of the sign allocated on the trailing edge arrives at the counter of 5 cycles and sets the counter to the zero state, and the incoming trailing edge at the input register 1 allows the code of the next character to be written to it. The pulse delayed by delay element 16 arrives at the synchronization punch to the device output and ensures that the code of the new character is fed to the inputs of the input register I. Thus, when forming characters containing fewer time intervals than the longest character, the formation time of characters is reduced.

The use of the invention in radar technology in display devices allows an increase in its response rate by an average of about 1.5 compared to a known driver, which provides more displayed information on the CRT screen, and allows for increasing demands on the display screens. in aircraft air control systems.

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Claims (2)

L SIGN-FORMING DEVICE by ed. St. No. 805401, distinguishing-! with the fact that, in order to increase the speed of character formation, a block for separating the end of the character is introduced into it, one of the inputs of which is connected to the outputs of the decoder of the character code, and the other inputs to the outputs of the decoder of the segments of the character, the first output of the block The selection of the end of the character is connected to the control input of the register and the control input of the clock counter, and the second output is to the input of the synchronization block. 1014009. 2. The device according to π. 1, characterized in that, the block of the selection of the end of characters contains a group of OR elements, the outputs of which are connected to one of the inputs of the corresponding AND elements, the outputs of which are connected to the inputs of the OR element, the output of which is connected. to a reset pulse shaper, the output of which is the first output of the block and connected to the input of the delay element, the output of which is the second output of the block, and the inputs of the elements OR groups are one of the inputs of the block, the second inputs of the AND elements are other inputs of the block.