SU1684753A1 - Method of determining the matrix plazma-panel display parameters - Google Patents

Description

one

(21) 4718533/21

(22) 07/11/89

(46) 10/15/91. Bksh. P 38

(71) Russian Radiotechnical Institute

(72) A.N. Shesterkin and A.M.Zimin

(53) 621.317 (088.8)

(56) Loban V.I. et al. Universal installation for the study of the electro-optical characteristics of sign-synthesizing indicators. - Electronic equipment, Seri 4, Issue 5. 1986,

pp.54-55.

(54) METHOD FOR DETERMINING PARAMETERS OF GAS-DISCHARGE MATRIX INDICATOR

(57) The invention relates to the indicator technique and can be used in the study of the parameters of gas discharge matrix indicators | (GMI). The aim of the invention is to increase the reliability and decrease the time for determining the corresponding parameter, for example, the discharge voltage, the lag time.

The invention relates to an indicator technique and can be used in the study of the parameters of gas discharge matrix indicators (GMI), such as discharge voltage, discharge time lag.

The purpose of the invention is to increase the reliability and reduce the time onj

the occurrence of a discharge, etc. The method consists in that a stimulating signal is cyclically given to each element of the display of the GMI, a response (fire) is detected from each display element in each cycle, the corresponding parameter is measured in each cycle. Moreover, the stimulus signal is removed from the display element at the same time for all cycles from the moment the response is detected and immediately after the end of the parameter measurement, after which a stimulus signal is generated for the next cycle. The invention increases the reliability and reduces the time for determining the corresponding parameter due to the fact that each element of the GMI display, when exposed to a stimulating signal, is in the same state in each cycle, the same time, and also due to the fact that each new cycle starts immediately after measurement. corresponding parameter. 2 Il.

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determining the corresponding parameter due to the fact that each element of the GMI display, when exposed to a stimulating (control) signal, is in the same state in each cycle, the same time, and also due to the fact that the new cycle starts immediately after measuring the corresponding parameter.

FIG. 1 shows a structural scheme of the device that implements the proposed method 1, FIG. 2 - time diagrams illustrating his work.

The device contains a generator of 1 pulses, a counter 2 synchronization, two-input element FROM, a generator of 4 stimulating signals, block 5

switching along the V axis, block 6 switching along the X axis, decoder converter 7 codes, counter 8 number of cycles, counter 9, decoder 10 minimum code, converter 11 code analog, measuring block 12, initial code detector 13, analyzer 14 the states of the display elements, the RS flip-flop 15, the driver 16. At the same time, the control inputs of the switching blocks 5 and 6 are connected to the corresponding outputs of the 4 stimulating signal generator, and their information inputs to the decoder-converter 7 codes connected to counter 8. Counter counting input 9 is connected to one of the outputs of the counter 2 synchronization, and its outputs are connected to the decoder 10 minimum code and the Converter

11 analogue code, the output of which is connected to the power supply bus of the generator 4 stimulating (control) voltages and information inputs of the unit

12, one of the outputs of which is an information output of the device. The output of the setter 13 is connected to the information input of the counter

9. The outputs of blocks 5 and 6 are connected to the input power lines of the GMI 17. The imager 14 of the state of the display elements is connected to the R input of the trigger 15 via the driver 16.

Generator 4 stimulating signals, blocks 5 and 6 are made on discrete elements. A photomultiplier tube is used as the analyzer 14 of the state of the display elements. The registration and further processing of the resulting information is carried out using a microcomputer.

The device operates, for example, when measuring the voltage of occurrence of a discharge as follows.

In the initial state, counters 8 and 9, trigger 15 are in the zero state. In this case, the output of the converter 11 is formed by

0 5 0

-

about

5 Q

five

the voltage is less than the minimum discharge voltage. With a successive change in the state of the counter 2, the generator 4 generates stimulating signals in the form of a sequence of voltage pulses. At the end of each cycle, this voltage at the output of counter 2 generates a cf signal that increases the state of counter 9 by one low-order unit. In this case, the output of the converter 11 generates a step of increasing voltage (Fig. 2), which is the power supply for the generator 4. When the counter reaches 9, causing the formation of the minimum possible discharge voltage, the output of the decoder 10 appears the signal that sets the trigger 15 to the idle state. The signal from the output of the trigger 15 enters element I 3 and permits the passage of the pulses of counter 2 to the control inputs of the generator 4. The pulses of the generator 4 with an amplitude equal to the output voltage of the converter 11 through the switching blocks 5 and 6 arrive at the input bus GMI 17 are selected sequentially using counter 8 and decoder-converter 7.

G, g amplitude of the output signals of the generator 4 reaches the voltage of occurrence of the discharge, then the selected display element is ignited. This is detected by the analyzer 14 and a signal is generated at its output, which ensures that the block 12 measures the output voltage of the converter 11, which corresponds to the discharge voltage. To increase the reliability of the determination of the state of the display element, the trigger 15 gates signals only after the termination of transients that occur during the formation of stimulating signals. The output signal of the analyzer 14, the trigger 15 is set to the initial state through a fixed standing burning time Ј (Fig. 2) determined by the driver 16. The loss of control pulses to the input of the generator 4 is prohibited. Thus, until the beginning of the next measurement cycle, the GMI 17 does not receive a control voltage, and therefore the effect of the burning of the previous display element on the next one is constant and with a small duration of burning is insignificant.

After the measurements are completed by block 12, a signal is generated that provides the entry in the counter 8 of the initial code value with the setting device 13, which is less than the minimum possible discharge voltage. At the same time, the output pulse of the block 12 increases the content of the cycle counter 8, which with the help of the decoder-converter 7 provides connections to the next display element, and the cycle of measuring the voltage of occurrence of the discharge is repeated. When counter 8 reaches the final value, a test termination signal is generated. Since the amplitude of the control voltage does not change from zero to the maximum value, but only from the minimum value until the element is ignited, then, all other things being equal, the time for determining the parameters of each element by the proposed method is much less than the known one.

If the next element under investigation is not ignited, for example, it turned out to be inoperable, then when the counter reaches its maximum value, block 12 is given a signal that measures and records the value considered during processing as a defect.

The invention provides a higher reliability of the measurement results in comparison with the known method due to the fact that in all measurement cycles a constant burning time of the display elements of the GMI is ensured, i.e. from cycle to cycle, the test conditions remain unchanged,

In the ELIMINAL method, the burning time in each cycle of the NL ect of the random TRLICHN1.0Y, respectively, varies about the cycle to the cycle of the conditions of the ip .. -s-si. The proposed method of testing a 4. With a known method ensures that the test time is reduced by the fact that each

the cycle is not constant in time, but starts immediately after measuring the corresponding parameter. In the lime method, the duration of all cycles is zinc and is forced by force of an external synchronization source.

So, the test matrix indicator PIT 10000 by a known method was 3-7 hours, and according to the proposed method - 2-5 hours.

Claims (1)

Invention Formula 25 The method of determining the parameters of a gas-discharge matrix indicator, consisting in cyclically sending stimulating signals to each display element of the gas-discharge matrix indicator, detecting in each response cycle from each display element of the gas discharge matrix indicator, and measuring in each cycle of the corresponding parameter, different that, in order to increase the reliability and decrease the time for determining the corresponding parameter, the stimulus signal is removed from the display element through the same time for all cycles from the moment the response is detected and immediately after the end of the parameter measurement, then a stimulus signal is generated for the next cycle.