SU1709387A2 - Device for checking parameters of gas panel - Google Patents

Abstract

The invention relates to a control and measuring technique. The purpose of the invention is improving the accuracy of control. The device contains a gas-discharge indicator panel (GUI) 1, a sweep block 2, a generator of 3 clock pulses, limiting elements 1 for 4 resistors, a separating element 5 for a diode, a driver for 6 ignition pulses, a separating element 7 for a diode, a controlled source 8 voltage, reading element 9, sensors 10 and 11 coordinates, delay block 12, memory block 13, pulse duration to code converter 14, control inputs 15 and -16, And 17 element. 1 Il.

Description

The invention relates to measuring technique and is an improvement of the device for monitoring the parameters of a gas discharge display panel according to the main ed. No. 1238144.

The purpose of the invention is to increase the accuracy of monitoring the parameters of the gas discharge display panel.

The drawing shows a structural diagram of a device.

The device comprises a gas discharge indicator panel 1, a scan unit 2, a clock pulse generator 3, restrictor elements 4 on resistors, a dividing element 5 on a diode, an ignition pulse shaper 6, a dividing element 7 on a diode, a controlled voltage source 8, a sensing element 9, sensors 10 and 11 coordinates, a delay unit 12, a memory unit 13, a pulse duration to code converter 14, control inputs 15 and 16, an AND element 17.

The device operates as follows.

The vertical tires of the gas discharge indicator panel 1 are alternately selected. ^g block 2 sweep, the input of which receives pulses from the output of the generator 3 clock pulses.

A voltage pulse is applied to the horizontal buses of panel 1 at the moment of selecting the next vertical bus from the ignition pulse generator 6, which ensures that a discharge occurs in the information display element of panel 1. The amplitude of the pulse from a controlled power source that follows the ignition pulse and serves to maintain the discharge is gradually increased by voltage source 8, controlled by the output signal of the converter 14. The duration of the pulse maintaining the discharge is several times longer duration of the ignition pulse, the sum of the durations of the ignition pulse and the pulse of the subderchonia discharge is close to the duration of the vertical bus selection pulse.

At the beginning of the measurement process, a preliminary reset is made transform? the input 14 “Reset and install the reading element 9, which is optically connected with the elements of panel 1 and mechanically connected with the sensors 10 (columns) and 11 (rows) of panel 1. opposite the cell 1 selected for monitoring.

By applying a pulse, starting at input 16, converter 14, controlling the source 8, gradually increases its output voltage supplied to the horizontal buses of panel 1 through resistors 4.

If the reading element 9 does not register a light signal in the cell of the panel 1, in the next image scan frame, the converter 14 produces an increment of the output code, and therefore, the source 8 increases the voltage amplitude by an amount proportional to the weight of the least significant bit of the converter 14,

At the time of registration of the radiation element of the cell by the reading element 9, the code signals are stopped from the output of the converter 14 by the signal from the reading element 9.

The Stop signal is generated by the And 17 element to one input of which there is a zero pulse from the second output of the ignition pulse generator 6, equal in duration to the ignition pulse, and the pulse from the readout element 9 is received to the other input of And 17 element. The Stop signal is generated only if there is no pulse with generator 3 and the presence of a signal from the reading element 9.

The signal from the reading element 9, delayed by the delay unit 12 for the data stabilization time, is fed to the control input of the memory unit 13 and writes the output code of the converter 14 to the memory unit 13 at the address read from the coordinate sensors 10 and 11 of the test display element of the display panel 1.

Next, the photosensitive element 9 is transferred to the next controlled cell of the panel 1 and its parameters are removed similarly.

The accuracy of control of the panel parameters is increased by eliminating the influence of the signals of the reading element 9 during the arrival of the ignition pulse, i.e. when the panel cell is ignited, regardless of the magnitude of the output voltage of the controlled voltage source 8.

Thus, the device provides control of the voltage to maintain the discharge in the panel with increased accuracy and the recording of the control result in the memory unit for subsequent automated testing of the control results.

Claims (1)

Claim Device for monitoring parameters. gas discharge indicator panel according to ed. No. 1238144, characterized in that, in order to increase the accuracy of parameter control, an I element is inserted into it, the first input of which is connected to the output of the readout element, the second input is connected to the second output of the ignition pulse generator, and the output of the And element is connected to the information the input of the pulse width converter to the code. Compiled by V. Sergienkd Editor T. Loshkareva Tehred M. Morgenthal Corrector T. Paly Order 430 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.