SU1119067A1 - Device for checking gaseous-discharge display panel - Google Patents

Abstract

A GAS DISTRIBUTED INDICATOR PANEL CONTROL DEVICE containing a data input unit connected to horizontal tires of a gas discharge display panel, whose vertical tires are connected to the outputs of the scanner whose input is connected to the first output of a synchronizer, the photometer optically connected to the gas discharge display panel, optically connected to the gas discharge display panel, connected to the first synchronizer output, optically connected to the gas discharge indicator panel, optically connected to the gas discharge display panel, connected to the first synchronizer output, optically connected to the gas discharge display panel, optically connected to the gas discharge indicator, output panel connected to the synchronizer output, optically connected to the gas discharge indicator panel, optically connected to the gas discharge indicator, output panel connected to the synchronizer output, synchronized which is connected to the first input of the switch, the second input of which and the synchronizer input are connected to the output of the pulse generator, the switch output is connected to the first input the counter, the second input of which is connected to the second output of the synchronizer, the output of the counter is connected to the first inputs of the register and adder, the second input of the register is connected to the third output of the sync gate, and the control unit for controlling the delay of the panel cells, connected in series with a comparator, an additional switch and an additional counter and the input block control Jpapmetra control, the output of which is connected to the first input of the comparator, the second input of which is connected to the output of the adder, the second input of the additional the switch is connected to the fourth output of the synchronizer, the first input of the data input unit is the first input of the device, the output of the additional counter is one of the information outputs of the device, the second input of the data input unit is connected to the output of the scanner, characterized in that ,, An I-OR element, an inverter, an additional block for inputting the control values of the parameter, a group of inverters, a key and additional blocks for controlling the delay of the ignition of the panel cells, the second The inputs of the commutators of the additional control units (L L Ignition delay of the panel cells are connected to the fourth output of the synchronizer; the output and input of each inverter of the group are connected respectively with the output of the previous comparator and the tpeTbHM input of the switch of the subsequent control units for the lagging delay of the panel cells, the first input of the I element -OR connected to the output of the register, the second input - with the output of the CD O 05 key, the third input - with the output of the inverter, the fourth input - with the output of the additional control value input unit PA ametra, and an output - to a second input of the adder, the input of the inverter connected to the output switch, the input of which is the second input device, the outputs of counters additional blocks ignition retard control cell information panel are devices outputs.

Description

The invention relates to a technique of display systems and can be used in the study of various methods of controlling a gas discharge display panel (HIP) of direct current and creating display devices for information on a HIP.

The direct current GUI has the property of delaying the breakdown (ignition) of the discharge gap. The delay of the breakdown depends on the type of gas, the pressure, the overvoltage, the control method, etc. The delay time of the breakdown and the difference of the retardation values of two consecutive breakdowns for any discharge gap are random in nature.

When displaying information on a GUI with a frequency higher than the critical frequency of flicker, the brightness B of any indicator element, according to the Talbot law, is proportional to the pulse duration with the vector emitted by this element

DR

In OiMP

where - the pulse intensity of the indicator element;

 - the duration of the light pulse;

T is the period of following light pulses.

In most cases, when controlling the GUI, the value of Vimp and T is constant, and the value of t varies due to the lagging property. Consequently, the brightness of the indicator element will change. The difference in brightness in adjacent frames of the image sweep with some methods of excitation may exceed the threshold of the light sensitivity of the eye and then this excess will be perceived as flickering. The presence of flashes significantly degrades the quality of the displayed information.

The quality of the information displayed on the GUI is controlled by the operator visually using test images. The operator makes a decision on the conformity of quality to the required, if all the indicator elements of the GUI are excited, synthesizing the required image, and there are no flickers of individual indicator elements of the image.

A device for displaying test images contains a GUI, a scanner, a counter, a generator, an N-step decoder, and two switching units. The device allows synthesizing various ornaments from indicator elements 1.

The disadvantage of control over test images is that the characteristics of the eye of the controller have a significant effect on the decision on the conformity of the quality of the displayed information to the desired effect. Control is subjective. Since the cause of flickering is the property of delays in breakdowns of gas discharge indicator elements, in order to make an objective decision on the quality of the displayed information, it is necessary to have a function of distributing the static delay time of breakdowns. A device for determining the static delay time of gas detenters containing a master oscillator, two blocking oscillator, multivibrator, two triggers, pulse counter, pulse voltmeter, charging device, drivers, 10 o-line novibratorov coincidence circuits 10, 10 counters. The device is a 10-channel time analyzer and allows you to determine the breakdown delay distribution function. The presence of this function makes it possible to compare with each other the methods (devices) of displaying information for selecting the optimal 2.

The disadvantage of the device is the impossibility of determining the difference in the duration of the delay of two successive breakdowns, since it is precisely this that characterizes the presence or absence of flashes.

Closest to the present invention is an information display quality control device comprising a GUI, information input and scanning units, a photometer, two switches, a generator, a synchronizer, two counters, an adder, a register, a comparator, a control values input unit. The device allows determining the difference of light pulses in adjacent frames of pa3BeptKn images, comparing and. with the threshold value and record the cases of exceeding the difference above the threshold value 3.

The drawback of the device is the impossibility of determining the function of the distribution of the difference in the delay of the ignition and the distribution function of the time of the delay of the ignition of the indicator elements.

The purpose of the invention is to expand the field of application of the device due to the possibility of obtaining the distribution function of the difference between the lag times of the indicator elements in adjacent image frames and the distribution function of the lag times of the indicator elements, i.e., improving the accuracy of the device.

To achieve this goal, a gas discharge indicator panel in the device for controlling a gas discharge display panel is connected to horizontal tires of a gas discharge display panel whose vertical tires are connected to the outputs of the scanner whose input is connected to the first output of the synchronizer, a photometer optically connected to a gas discharge indicator panel, the output of which is connected to the first input of the switch, the second input of which and the synchronizer input are connected to the output of the generator

pulses, the switch output is connected to the first counter input, the second input of which is connected to the second synchronizer output, the counter output is connected to the first inputs of the register and adder, the second register input is connected to the third synchronizer output, and the control panel for the delay of ignition of the panel cells containing series-connected comparator , additional switch and additional counter, and a block for input of control values of the parameter, the output of which is connected to the first input of the comparator, the second input of which is connected The second input of the additional switch is connected to the fourth output of the synchronizer, the first input of the data input unit is the first input of the device, the output of the additional counter is one of the information outputs of the device, the second input of the data input unit is connected to the output of the scanner an AND-OR element, an inverter, an additional block for inputting the control values of the parameter, a group of inverters, a key and additional blocks for controlling the delay of the ignition of the panel cells, the second inputs of the comm Atrial controllers for delayed ignition of the panel cells are connected to the fourth output of the synchronizer, the output and input of each inverter of the group are connected respectively to the comparator output of the previous one, and the third input of the switch of the subsequent panel for controlling the delay of the ignition of the panel cells, the first input of the AND-OR element is connected to the register output, the second input - with the output of the key, the third input - with the output of the inverter, the fourth input - with the output of the additional block for inputting the control parameter values, and the output - with volts The input of the adder, the input of the inverter is connected to the output of the key, the input of which is the second input of the device, the outputs of the counters of the additional units for controlling the ignition delay of the panel cells are information outputs of the device.

With such switching on of these blocks, the device allows to determine the distribution function of the difference in delay of breakdowns of gas discharge gaps in the GUI in adjacent image sweep frames. By knowing the threshold value of this difference and comparing it with the obtained distribution function, it is possible to judge the presence or absence of flickering, and, thus, the quality of the reflected information.

In addition, the device makes it possible to determine the distribution function of the lag time of breakdowns of gas discharge gaps under various methods of displaying information and under various external conditions.

The drawing shows a block diagram of a device which makes it possible to determine the functions of the distribution of the delay time of the ignition and the difference of the delay time of the ignition of the indicator elements of the direct current ISU.

The device contains a data input unit 1, a gas discharge indicator panel (GUI) 2, a scanner unit 3, a synchronizer 4, a pulse generator 5, a photometer 6, a switch 7, a counter 8, a register 9, an AND-OR element 10, an inverter 11, a key 12 second

the input of the device 13, the additional block for inputting the control values of parameter 14, the adder 15, the control units for lagging the panel cells, comparators 17i-17i, additional commutators 18i - ISr ,, additional counters 19i -19) 1, inverters of group 20, control input blocks The values of the parameter 21, -21 device works as follows.

Information through the input unit 1 enters the GUI 2 synchronously with the scanning of the image carried out by the scanning unit 3. The scanning unit 3 sequentially selects the electrodes (columns) of the GUI 2 according to the signal from the first synchro output. 4, which is controlled by generator 5.

Using the optical system of the photometer 6, a monitored indicator element is selected, which, excited, causes the appearance at the output of a photo meter 6 an electrical pulse of a certain duration equal to the duration of the light emission of the indicator element. An electrical impulse from the output of the photometer 6 is fed to the control input of switch 7 and permits the passage of high-frequency pulses from the output of the generator 5 to the counting input of counter 8.

The pulse duration from the output of the photometer 6 will be different in each frame of the image sweep due to the random nature of the lag time of the discharge of the indicator element. The counter 8, accumulating high-frequency pulses from the generator 5, passing through the switch 7, measures the excitation time of the indicator element in each frame of the image sweep. The value of the digital signal corresponding to the duration of the light pulse is copied from the output of counter 8 to the register 9 of clock pulses from the third output of the signaling device 4. Then, at the end of the image frame sweep, the counter 8 is zeroed with a clock pulse from the second output of the synchronizer 4.

The logical element AND-OR 10 is controlled by an inverter 11, the state of which

 depends on the position of the key 12, one output of which is connected to the input 13 of the signal "log. O. If the key 1 is open, then the output of the register 9 passes the output of the logic element 10, if the key 12 is closed, then the output of the element 10 passes the information from the block of input of control values of parameter 14. The key 12 determines the definition of a distribution function .

Suppose that key 12 is open. In this case, on one of the inputs of the adder 15 there will be a code corresponding to the duration of the light pulse of the selected indicator element in the current image sweep frame (from the output of the counter 8), and on the other inputs - a code corresponding to the duration of the light pulse of the display cell in the previous sweep frame (from Exit register 9). At the output of the adder 15, a code is set, the value of which corresponds to the difference in the duration of the light pulses of the selected indicator element in the adjacent image sweep frames.

The code from the output of the adder 15 is fed to the first inputs of the comparators IZj-17. The second input of each of the comparators 17 receives a signal from the corresponding block of input of control values of the parameter 2Ij-21 ". The value of the signals at the outputs of blocks 21 in each subsequent block increases and is chosen in such a way as to cover the entire range of variation of the time lag of breakdowns or their differences in adjacent frames and to ensure the highest accuracy of measurement of the distribution of parameters.

If the value of the digital signal code at the first input of any comparator is greater than the value of the digital signal code set at the second input, then the output of this comparator 17 is set to a "log. 1, which is provided to the first control input of the corresponding switch ISj-18p. The second control input of the switch 18j - 18 is sent to the second output of the corresponding inverter 20. Therefore, the state of the switch 18 of each previous block depends on the output of the comparator 17 of each subsequent block 16. The pulse signal from the fourth output of the synchronizer 4 passes through that switch 18, on both control inputs of which a “log. 1. This switch will appear only in that block 16i -16 and in which the code value of the block of input of control values of parameter 21 is less than the value of the digital code at the output of the adder 15.

Suppose that the code value from the output of the adder 15 is greater than the value of the comparators 17j and IZ codes and less than the value of the comparators 17z and 17 codes. In this case, the log. 1, and at the outputs of the comparators 17z and 17i - the signal "log. A. The second switches 18z, iSn will be closed by the signals «log. About the first input, the switch 18i will be closed by the signal "log. About on the third input and only on the first and third inputs of the switch 18 of the block 16g the signal "log. one.

The signal from the fourth output of the synchronizer will pass through the switch 18: -i to the input

hl counter, which records that the difference between the values of the delay times of the sample of the selected gas discharge gap in this image scan frame and the previous one is in the range defined by the values of the codes of the blocks 21

and 21 ;;.

Thus, at the end of each image sweep frame, the obtained separation, 6 lag times, will be fixed by one or another counter 19. At the end of the measurement cycle, taking into account the signals at the outputs of all counters 19, we obtain the distribution of differences in the breakdown delay values over the entire range of variation. Suppose that key 12 is closed. In that

the second inputs of the adder 15 will receive a signal from block 14, the value of which is chosen by the operator depending on the image sweep frequency and determines the code of the sample period of the GUI 2 column. At a stable oscillator frequency

5 The value of the column sampling period is also stable. The adder 15 in each image sweep frame will compare the duration of the sample period of the GUI 2 column from block 14 and the duration of the light pulse of the display cell in this frame measured by the counter 8. The code value at the output of the adder 15 will be equal to the delay time of the selected discharge gap.

Further operations with a sample lag code are similar to operations with a lag difference code for breakdowns in adjacent frames. As a result, at the end of the measurement cycle, at the outputs of the counters 19j-19 1, codes are established that characterize the distribution of the delayed breakdowns of the indicator element in the range under study.

Thus, this device allows the determination of the breakdown delay distribution function and the breakdown delay difference distribution function in adjacent image sweep frames. Knowledge of these distributions for various methods of control of the GUI will make it easier to choose one way or another that minimizes the flashing of display elements to a minimum or eliminates it.

Claims (1)

DEVICE FOR CONTROL OF A DISCHARGE INDICATOR PANEL, comprising a data input unit connected to horizontal buses of a gas discharge display panel, vertical buses of which are connected to outputs of a scan unit, an input of which is connected to a first output of a synchronizer, a photometer optically coupled to a gas discharge indicator panel, the output of which connected to the first input of the switch, the second input of which and the input of the synchronizer are connected to the output of the pulse generator, the output of the switch is connected to the first input of the counter a, the second input of which is connected to the second output of the synchronizer, the output of the counter is connected to the first inputs of the register and the adder, the second input of the register is connected to the third output of the synchronizer, and the ignition delay control unit of the panel cells, containing a comparator, an additional switch and an additional counter connected in series and a unit for inputting control values of the papameter, the output of which is connected to the first input of the comparator, the second input of which is connected to the output of the adder, the second input of the additional switch and connected to the fourth output of the synchronizer, the first input of the data input unit is the first input of the device, the output of the additional counter is one of the information outputs of the device, the second input of the data input unit is connected to the output of the scanner, characterized in that, in order to increase the accuracy of the device, an AND-OR element, an inverter, an additional block for inputting control parameter values, a group of inverters, a key and additional blocks for controlling the ignition delay of the panel cells, the second inputs of the commutator are introduced the ditch of the additional ignition delay control units of the panel cells is connected to the fourth synchronization output ^{1 of the} mash, the output and input of each inverter of the group are connected respectively to the comparator output of the previous and the third input of the switch of the subsequent ignition delay control units of the panel cells, the first input of the AND-OR element is connected to the register output , the second input - with the output of the key, the third input - with the output of the inverter, the fourth input - with the output of an additional input unit for entering control values of the parameter, and the output - from the second input of the adder, the input of the inverter connected to the output switch, the input of which a second input device, the outputs of counters additional blocks of cells ignition retard control panel are information device outputs. SU „„ 1119067