SU760080A1 - Indication device - Google Patents

Description

The invention relates to the field of automation and computing and can be used to display information on the matrix display panels, in particular on the gas discharge display panels of alternating current.

A device comprising a logic unit, generators of reference and control pulses, and interface units connected to the electrodes of the gas-discharge display panel [1] is known.

The disadvantages of the known device are its complexity and low reliability.

The closest po'tehnicheskoy essence to the invention is a device comprising a gas discharge display panel coupled to the coupling blocks ^{15 of} the first matrix group through which decoupling diodes are connected to outputs reference clock generator and the charging current, the second matrix group through other decoupling diodes ₂₀ are connected to the outputs of the generators of the reference and control pulses and a charging current generator, the inputs of each of which are connected to the outputs of the logic unit [2].

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However, such a device is not reliable enough in operation.

The aim of the invention is to improve the reliability of the device.

This goal is achieved by the fact that the device containing decoupling elements of the first group, the inputs of which are connected to the outputs of the first, second pulse formers and the first controlled current generator, the input of which is connected to the first output of the synchronization unit, the second and third outputs of which are connected to the inputs of the first and the second pulse shapers, decoupling elements of the second group, the first and second inputs of which are connected to the outputs of the first controlled current generator and the second pulse shaper, the outputs of the decoupling elements of the first and second groups are connected to the first and second inputs of the address switch, the outputs of which are connected to the electrodes of the gas-discharge display panel, a second controlled current generator is introduced, the input of which is connected to the fourth output of the synchronization unit, and the outputs are connected to the second inputs of the address switch and the third

named inputs decoupling elements of the second group. ........

The drawing shows a diagram of the device.

The device for indicating comprises a gas-discharge indicator panel 1, the first pulse shaper 2, a controlled current generator 3, an address switch ⁵ , a controlled current generator 5, a second pulse shaper 6, a synchronization unit 7, decoupling elements 8 and 9 of the first and second groups .

Address switch 4 consists of diodes <ORD ϋι, ϋ Σ, diodes Oz, Od, O ₅ form the first group of decoupling elements, and diodes ₆ , ϋ ζ - the second group of decoupling elements.

The device works as follows.

From the driver 6 pulses through ¹ pulsed diodes Od, the front edges of the pulses are transmitted to the horizontal (X coordinate) electrodes of the gas-discharge display panel 1. These pulses are cut to the electrodes through ₂ O g diodes with charge accumulation. The diodes of the address switch 4 are connected through the diodes of the second group of decoupling elements with the outputs of the first controlled current generator 5 and the second driver 6 pulses. The cathodes of diodes ϋ g through 2 diodes Oz, El and Oz of the first group 9 decoupling elements are connected respectively to the outputs of the formers 2 and 6 pulses and the first controlled current generator 5. From the output of the current generator 5 through the diode O & corresponding to the selected electrode along the X coordinate, the charging current is passed, which causes an accumulation of charge on this diode to ensure the passage of a control pulse from the first driver 2 to the selected electrode.

Before this, it is necessary to perform resorption of charges in all diodes ϋ ζ after passing the front of the voltage pulse to maintain the discharge and the discharge currents of the burning display elements. For this purpose, all diodes ϋι are supplied from generator 3 with a voltage pulse of reverse polarity, providing charge dissipation current through the capacitance of diodes L <and the capacitance of the panel electrodes. ''

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After the resorption of charges in the diodes ϋ ζ, the diode ϋϋ, which is connected to the selected electrode, is selectively pumped using a controlled current generator 5, after which all the diodes Og are supplied with the voltage of the control pulse from the driver 2 pulses.

Thus, by introducing a second controlled current generator, which prevents the false transmission of the control pulse to the unselected panel electrodes due to the charge accumulated in the diodes заряда g from passing through them from the cutoff of the reference pulse, the reliability of the device increases.

Claims (1)

Claim A display device containing decoupling elements of the first group, the inputs of which are connected to the outputs of the first, second pulse formers and the first controlled current generator, whose input is connected to the first output of the synchronization unit, the second and third outputs of which are connected to the inputs of the first and second pulse formers, decoupling elements of the second group, the first and second inputs of which are connected to the outputs of the first controlled current generator and the second pulse shaper, the outputs of the decoupling elements The first and second groups of cells are connected to the first and second inputs of the address switch, the outputs of which are connected to the electrodes of the gas-discharge display panel, characterized in that, in order to improve the reliability of the device, a second control current generator is inserted into it, the input of which is connected to the fourth output of the synchronization unit and the outputs are connected to the second inputs of the address switch and the third inputs of decoupling elements of the second group.