SU1716562A1 - Indicator - Google Patents

Abstract

The invention relates to automation and computing and can be used in computerized display systems. The purpose of the invention is to improve the quality of displaying information by displaying only significant digits. The goal is achieved by the fact that the device containing indicators 1, keys 2, counter 6, decoder 7 characters, counters 5 groups, generator 12 clocks, first element AND - NOT, element NOT 13, entered elements OR element OR - NOT, elements The ban and the multivibrator, which ensures zero damping, in front of the significant digit and eliminates the indicator failure if the clock pulses disappear. 1 Fig. Jt table.

Description

X5

Os from X N9

Information byhode

The invention relates to automation and computing and can be used in information output and display devices.

The purpose of the invention is to improve the quality of the display of information by ensuring that only significant digits are displayed.

The drawing shows a block diagram of the device.

The device contains n indicators 1i -In, each of which is connected to the output of keys 2i-2n, rt-1 elements OR 3i-3n-i, p-2 elements Ban 4i-4n-2, n information counters 5i-5n, the subtraction inputs of which connected to the summing input of the counter 6, its output connected to the information input of the decoder 7 characters, the first element AND - NOT 8, one input of which is connected to the input of the second element AND - NOT 9 element OR NOT 10, the multivibrator 11 with the second launch, generator 12 clock pulses, the element is NOT 13.

The device works as follows.

At the beginning, at the device input, the Write / Read signal is set to logical O. Clock signals from the generator output 12 clock pulses do not come through AND-HE elements 8. Therefore, at the output of the multivibrator 11c, a re-launch establishes a logic level O, which is input to the gate of the decoder of 7 characters. At the output of the 7-digit decoder, these signals are absent, and on indicators 11-1n the information is not reproduced. By a signal from the installation input of the device, the counter 6 and the information counters 5i-5p are set to the zero state. Then from the information input of the device through the element AND - HE 9 signals are fed to the summing input of the first information meter 51, In accordance with the number of pulses received from the third input of the device, the code value is set at the outputs of the information counters 5i - 5p, and the higher bits of the values are written in the counter 5p, and the younger ones in the counter 5i. After recording the information, the signal at the control input of the device is set to one. Thus, the input signals through the AND-HE 9 element to the summation input of the first information counter 5i are prohibited. From the generator output 12 clock pulses, the pulses are received through the AND-HE 8 element, the pulse frequency of which is fp S fKp N, where fxp is the critical flicker frequency; N is the length of the alphabet of characters displayed.

When the first pulse arrives from the output of the element AND - HE 8, the multivibrator 11 is started up with a restart and its level is set to a logic level 1, which arrives at the gate input of the decoder 7 characters. Thereby, the generation of a 7-character decoder at the outputs is permitted in accordance with the value at the information inputs

0 outlines. The duration of the pulse tn, formed at the output of the multivibrator 11 with a restart, is chosen to be somewhat longer than the follow-up period of the input pulses. Therefore, when the input pulses are received at the output of the multivibrator with a restart, the value of logical 1 is saved.

When each pulse arrives from the output of the element AND - HE 8, the state of the counter 6 increases by one, and the information counters 5i-5P decreases by one. At the output of the element OR - NOT

The 10 signal has a logical O value when playing numbers from 1 to 9. Therefore, one input of the last element OR 3 n-1 and the direct input of the Ban An-2 element have a logical O value. At the output of the Ban 4n-2 signal, the signal logical Oh so on

0 output element Prohibition 4P - s level, logical O, etc. Thus, at the same inputs of the OR 3i - 3p - 1 elements, the logical level O is applied. As a result, the signal at the output of the elements OR 3i 5 3p - 1 is determined by the signal value at the transfer output of the subtraction information counters 5i ..- 5П. So, if the signal at the transfer output of the subtraction information counter 5t has the value of logical

0 1, then the signal at the output of the element OR 3i is logical 1 and there is no signal at the output of the key 2j and on the indicator

11 information is not reproduced. At the moment when one or more

5 information counters 5i - 5n go from state 0 to state 9, a logical O signal appears at the transfer output of the subtraction. At the other input of the OR element 3, the signal is equal to logical O, therefore the signal at its output is also equal to logical O. From the output of the corresponding key 2i -2n, a signal is applied to the control input of the corresponding indicator 11 - In. At this point in time, the exit code

5, counter 6 has a value equal to the code value after recording those information counters 5i-5n, at the transfer output of which the signal has a logical O value. Therefore, at the output of the 7-character decoder, a mark code is formed that corresponds to the code of the digit recorded in the corresponding information counter 51 - 5p. and on indicators 1t-; 1n, to which the control signal from the output of keys 2h - 2n is applied, numbers are reproduced.

The duration of the signal at the transfer output of the subtraction of reversible counters is equal to the pause between pulses at the first input of the device. Therefore, it is advisable to reduce the pulse duration, i.e. increase the duty cycle when using vacuum fluorescent, LED and other indicators. And when using the IGL - 17 segmented gas-discharge indicator panel, the pulse duration must correspond to a pause between connecting familiar places, i.e. 30 - 40 µs.

The table shows the code values at the counter output of the character synthesizer and the outputs of six information counters when recording the number 001506.

At the moment of time when a graphic1 code zero is formed at the output of the decoder of 7 characters, its information value is 0000 at the information input. Therefore, the output of the OR element is NOT 10 has a logical value of 1. input through the OR Zn-1 element of the 2 key input . At the output of the 2P key, the control signal is missing, and the digit 0 on the 1P indicator is reproduced regardless of the code value in the 5P information counter. If the 5p code in the information counter corresponds to the digit 0, then zero is suppressed in the higher order.

If in the information counter 5 | Since the code corresponds to the digit / O, the signal at the output of the subtraction transfer is logical O. Therefore, at the output of the Inhibit element 4P -2, the signal has a value of 1 and the 1P -1 indicator is not lit. Depending on the value of the code recorded in the counter 5p - 1, the signal at the output of the Ban 4p-z element is logical 1, if the code is 0 ... 00, and logical O, if different from 0 ... 00. Thus, non-significant zeros are quenched. If the digit code zero is written to the information counter after a significant digit in one of the higher bits, the digit 0 is reproduced in this bit, because the logical input O is present at both inputs of the corresponding element OR 3i - 3n -2.

If in all information counters 5i - 5p the code corresponds to the digit 0, then zero is reproduced only on the indicator 1i of the lower order, since the key 2 | controlled directly from the transfer output of the subtraction of the first information counter 5i.

When the receipt of pulses from the generator output 12 clock pulses through an AND - HE 8 element at the output of the multivibrator 11 with a restart, is stopped, the logic level O is established through the time duration of the output pulse. Signal logic O at the input

0 gating of the 7-digit decoder is prohibited the formation of a graphic code at its output, and the indicators 1i-1P are not illuminated. This eliminates the failure of the indicators 1t - 1n and the keys 2i - 2n. After

5 incoming clock pulses at the input of the element AND - HE 8 at the output of the multivibrator 11 with a restart sets the logic level 1 and restores the normal operation of the device.

Thus, in this device, reliability is increased by eliminating the failure of indicators and keys in the absence of input pulses, and the quality of display of information is improved by suppressing

5 zeros before the first significant digit. Formula from the stand-by device A display device containing indicators, the control inputs of which are connected to the outputs of the keys, and

0 information inputs connected to the output of the character decoder, the information input of which is connected to the output of the counter, the counting input of which is connected to the subtractive inputs of the group counters and

5, the output of the first element AND is NOT, the first input of which is connected to the output of the clock generator, the installation inputs of the counter and the group of meters are the installation input of the device, the output

0, the transfer of the subtraction of the first counter of the group of counters is connected to the input of the first key, the outputs of the counters of the group are information output of the device, the element NOT whose input is the control input of the device and the output connected to the first input of the second element AND-NOT whose output is connected to the summing input of the first counter of the group counters, summing the inputs of the subsequent

0 group counters are connected to the transfer outputs of the previous ones, which means that, with the Purpose of improving the quality by displaying only significant figures, the elements OR are entered into it,

5 element OR - NOT, Prohibit and multivibrator elements, the input of which is connected to the output of the first element AND - NOT, and the output is connected to the gate of the character decoder, the information inputs of which are connected to the inputs of the element OR

- NOT, the output of which is connected to the second input of the last element OR and to the first input of the last element of the Ban, the first inputs of the previous element of the Ban are connected to the output of the next element of the Ban. The second inputs of the Elements of the Ban are connected to the transfer outputs of the subtraction of the corresponding group counters and to the first the inputs of the OR elements, the second inputs of the OR elements, except the last one, are connected to the inputs of the Inhibit elements, the outputs of the OR elements, except the first one, are connected to the inputs of the corresponding keys.

Claims (1)

SUMMARY OF THE INVENTION A display device comprising indicators, the control inputs of which are connected to key outputs, and 30 information inputs are connected to the output of the character decoder, the information input of which is connected to the output of the counter, the counting input of which is connected to the subtracting inputs of the group meters and 35 the output of the first AND element - NOT, the first input of which is connected to the output of the clock generator, the installation inputs of the counter and the group of counters are the installation input of the device, subtraction transfer output 40 the first counter of the group of counters is connected to the input of the first key, the outputs of the counters of the group are the information output of the device, the element is NOT, the input of which is the control input of the device, and the output is connected to the first input of the second element AND is NOT, the output of which is connected to the summing input of the first counter of counters groups summing the inputs of the next 50 counters of the group are connected to the outputs of the transfer of addition of the previous ones, characterized in that, that. in order to improve the quality by displaying only significant digits, OR elements are entered into it, 55 the OR element is NOT, the Prohibition and multivibrator elements, the input of which is connected to the output of the first element AND are NOT, and the output is connected to the gate input of the character decoder, information inputs which are connected to the inputs of the OR element - NOT, the output of which is connected to the second input of the last OR element and • to the first input of the last Deny element, the first inputs of the previous Deny element are connected to the output of the next 5 Deny element, the second inputs of the Deny element are connected to the subtraction transfer outputs of the corresponding group counters and to the first inputs of the OR elements, the second inputs of the OR elements, except the last, are connected to the inputs of the Deny elements, the outputs of the OR elements, except the first, are connected to the inputs of the corresponding keys. Code at the output of the sign synthesizer counter Code at the output of information counters / Signal at the output of subtraction transfer eleven 12 la 1d 1b 1b 0 6/1 0/0 5/1 1/1 0/0 0/0 1 5/1 9/1 4/1 0/0 9/1 9/1 2 4/1 8/1 3/1 9/1 8/1 8/1 3 3/1 7/1 2/1 8/1 7/1 7/1 4 2/1 6/1 1/1 7/1 6/1 6/1 5 1/1 5/1 0/0 6/1 5/1 5/1 6 0/0 4/1 9/1 5/1 4/1 4/1 7 9/1 3/1 8/1 4/1 3/1 3/1 8 8/1 2/1 7/1 3/1 2/1 2/1 9 7/1 1/1 6/1 2/1 1/1 1/1 0 6/1 0/0 5/1 1/1 0/0 0/0 1 5/1 9/1 4/1 0/0 9/1 9/1