SU834741A1 - Device for control of electroluminescent indicator - Google Patents

Description

Union of Soviet Socialist Republics

(B “УД> РСТМЛ1ШЯ committee

USSR on matters of imbretonium and discovery

SUMMARY OF THE INVENTION

TO AUTHOR'S CERTIFICATES / - mi ——— w - ^ »41 hi ..............

(61) Additional to author speed-woo (22) 3 announced on 12/27/79 (21) 2860198 / 18-24 with the addition of application No. - (23) Priority

Published on May 30, 81. Bulletin M 20

Date published »» descriptions 30.05.81 ου834741 (51) M. Cl

G 09 G 3/12 (53) UDC681.327 (088.8) (72) Authors of the invention (71) Applicant

N. A. Trofimov, E>. M. Komarov, N. A. You and N. K. Smirnovр h

- / ΐ (54) DEVICE FOR CONTROL OF AN ELECTROLUMINESCENT INDICATOR, · 1. · The invention relates to the field of c— Tomato computing and can be used for visual data output, for example, in a pneumatic display. A device is known. For indication, containing a generator of increased frequency (usually 400 Hz), providing a phosphor luminescence, control elements on transistors and resistors assembled according to a bridge circuit, and a source of in ~. formations £ ΐ ^. .10

The disadvantage of this device is the low reliability of the display of information on an electroluminescent indicator, since the absence of luminescence of the dicagor does not give an unambiguous idea of the lack of information from the information source. This fact is also observed in the event of a failure of the high-frequency generator. For this reason, it is impossible to wake up about the displayed process with high reliability.

• The purpose of the invention is to increase the reliability of the device.

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This circuit is achieved by the fact that in the device for controlling an electroluminescent indicator, containing an information source connected to a control unit, the output of which is connected to an electroluminescent indicator, and a generator, an additional generator and series-connected differentiation unit, a time relay, an element NOT and a memory unit are introduced, a key and a switch, the first input of which is connected to the output of an additional generator connected to the first input of the key, the output of which is connected to a generator, the output of which the second is connected to the input of the differentiation unit and the second input of the switch, the output of which is connected to the control unit, and the output of the unit, the memory is connected to the third input of the switch and the second key input.

The drawing shows a diagram of the device.

A device for controlling an electroluminescent indicator 1 consists of

634741 4 control units 2, switch 3, memory unit 4_, element NOT 5, time relay 6., differentiation unit 7, high-frequency generator 8, Key 9, additional low-frequency generator 10 and information source 11.

The device operates as follows.

When a high-frequency generator 8 is operational, the signal from its output through 10 differentiation unit 7 periodically turns on the relay in time, which, through the element NOT 5, maintains block 4 in such a state that the signal from the latter turns on switch 3 for 15 voltage transmission on block 2 control and further to the electroluminescent indicator 1. In this case, information from the information source 11 is displayed on the indicator 1 by the glow of the last optimum (design) brightness.

If the generator 8 malfunctions, either its voltage is completely absent at its output, or some constant voltage is present. 25

In both cases, there is no voltage at the output of the differentiation unit 7, and after a time equal to one period of the voltage of the high-frequency generator, there will also be no voltage at the output of the relay 6 of time ³⁰ .

Through the element NOT 5, block 4 will connect the control unit 2 through the switch 3 to an additional generator 10 of reduced (for example, industrial) frequency. ³³ In this case, the electroluminescent indicator 1 will function, although it will glow with a reduced brightness. Thus, firstly, the accuracy of the display is provided as the presence or absence of ⁴⁰ The relative information output from the information source. Secondly, the luminescence of the indicator with low brightness allows the operator to conclude that the high-frequency generator fails and replace it ^{45 in a} timely manner.

In addition, in the event of any malfunction of the high-frequency generator 8, the key 9, upon a signal from the unit 4, disconnects the generator 8 from the low-frequency (for example, industrial) frequency generator 10 50 ', not allowing the short circuit that may occur in the generator 8 to propagate in the low-power network frequency.

The proposed device may find ’application in information display systems of technological processes of increased reliability in chemical, metallurgical and other industries.

. Increase. reliability of information display allows you to create a certain economic effect, since. • the proposed device provides timely detection of deviations in the displayed technological process, which in turn enables the operator to take the necessary measures in a timely manner.

Claims (1)

(54) DEVICE FOR CONTROLLING THE ELECTROLUMISCENT INDICATOR e3 of the control unit 2, switch 3, memory block 4, NOT element 5, time relay 6., differentiation unit 7, high frequency generator 8, Key 9, additional generator 10 lower 1 | frequency and source of information 11. The device operates as follows. When a high-frequency generator 8 is in good condition, the signal from its output through differentiation unit 7 periodically turns on the time relay b, which at the same time, through element NOT 5, supports unit 4 in such a state that the signal from the latter switches on switch 3 to pass the voltage on control unit 2 and further on the electroluminescent indicator. At the same time, information from the source of information 11 is displayed on the indicator 1 by the luminescence of the latter with optimum (project) brightness. If the generator 8 fails, its output either has no voltage at all, or some constant voltage is present. In both cases, the output of the unit di ({7 generation voltage) is absent and after a time equal to one period of the high-frequency generator voltage, the output of the time relay 6 will also have no voltage. Through element HE 5, unit 4 connects control unit 2 through the switch 3 to the additional generator 10 of a lower (e.g., industrial) frequency. In this case, the electroluminescent indicator 1 will function, although it will be reduced to a reduced brightness. Thus, firstly, the reliability of Already both the information and the lack of information from the output of the information source. Secondly, the low indicator light illuminates the operator to make a conclusion about the high frequency generator failure and to replace it in a timely manner ... In addition, if any high frequency generator fault occurs The key 9, according to the signal from block 4, disconnects the generator 8 from the generator 1O 1 of a lowered (.HatfpMMep, industrial) frequency, preventing the short circuit that may occur in the generator 8, to propagate in the network of a lower frequency. The proposed device can find application in information display systems of technological processes of increased reliability in chemical, metallurgical and other industries. . Boost. the reliability of the information display allows you to create a certain economic effect, since. The proposed device provides timely detection of deviations in the technological process displayed by them, which in turn allows for operation. The administrator should take the necessary measures in a timely manner. Apparatus for controlling an electroluminescent indicator, comprising an information source connected to a control unit, the output of which is connected to an electroluminescent indicator, and a generator, characterized in that, in order to increase the reliability of the device, an additional generator and a series-connected differentiation unit, a relay, are introduced into it time, the item is NOT and the memory block, the key and the switch, the first input of which is connected to the output of an additional generator connected to the first input Lyucha whose output is connected to a generator, the output of which is connected to the input unit. differentiation and the second input of the switch, the output of which is connected to the control unit, and the output of the memory unit is connected to the third input of the switch and the second input of the key. Sources of information taken into account during the examination 1. USSR author's certificate N 363.089, cl. G 06 G 3/14, 1970 (prototype) .. J I