RU2042216C1 - Device for representing information at gas-discharge indicator panel - Google Patents

Abstract

FIELD: automatics; computer technology. SUBSTANCE: gas-discharge indicator panel 1, indicator switches group 2, sweep decoder 3, group 4 of anode switches, memory unit 5, sweep pulse counter 6, register unit 7, sample decoder 8, clock pulse generator 9, commutator 10, address register 11, data register 12, record pulse counter 13, control unit 14. Data recording cycle is synchronized with data representation cycle. EFFECT: improved speed of operation. 4 dwg

Description

 The invention relates to automation and computer engineering.

 A device for displaying information [1] containing a series-connected pulse generator, a first counter, a column selection unit connected to the vertical buses of the matrix display panel, and series-connected memory unit and a line selection unit connected to the horizontal buses of the matrix display panel, a switch, a second a counter, an And element, and an analog-to-digital converter (ADC), the first output of which is connected to the information input of the memory unit, the second output with the first input of the switch, a swarm and the third inputs of which are connected to the outputs of the counters, and the output of the switch is connected to the address input of the memory unit, the control input of which is connected to the output of the And element, the first input of which is connected to the second output of the ADC, the input of which is the first input of the device, and the second input of the And element and the input of the second counter is the second input of the device.

 The known device has low speed on the cycle of recording information, since the recording of information of one line in the memory is carried out element-wise, synchronously with the submission of the address of this element.

 Closest to the technical essence of the invention is a device for displaying information [2] containing a clock pulse generator, a pulse counter for sweeps, the outputs of which are connected to the first information inputs of the switch and the inputs of the decoder sweeps, the outputs of which are connected to the horizontal buses of the gas-discharge display panel, the vertical buses of which connected to the outputs of the keys of the second group, a memory unit, the address inputs of which are connected to the outputs of the switch, register, pulse counter for ISI, a recording decoder, the first and second elements are FORBID, and the output of the clock is connected to the first input of the first element for FORWARD, the second input of which is connected to the control input of the switch and the output of the second element for FORWARD, the first input of which is connected to the counting input of the pulse recording counter and is the first control input of the device, the second input of the second element is FORBID connected to the counting input of the counter of pulses of the scan, the control inputs of the keys of the first and second groups, the first control input ohm of the memory block and the output of the first element is FORBID, the information inputs of the register are connected to the information inputs of the memory block and are the information inputs of the device, the control input of the register is connected to the installation input of the recording pulse counter and is the second control input of the device, the output of the register is connected to the second information input of the switch, the second control input of the memory unit is connected to the output of the recording decoder, the input of which is connected to the output of the recording pulse counter, the control input of the decoder Ator recording coupled to an output of the second element is inverted and control output devices.

 A disadvantage of the known device is the low speed caused by the lack of synchronization of data recording in memory and reproduction of information on the gas discharge display panel, which leads to the need to interrogate the signal "Readiness" before writing data to the device memory.

 The objective of the invention is to increase the speed of the device by synchronizing the data recording cycle with the information display cycle.

 The objective is achieved in that in a device for displaying information on a gas discharge display panel containing a clock pulse generator, a scan pulse counter, the outputs of which are connected to the address inputs of a scan decoder, the outputs of which are connected to the corresponding inputs of the cathode switch group, the outputs of which are connected to the gas discharge cathode buses a display panel, the anode buses of which are connected to the outputs of the group of anode keys, a memory block, the address inputs of which are connected to the outputs of the switch, when than the counting input of the pulse recording counter is the first control input of the device, the synchronizing input of the address register is connected to the reset input of the pulse recording counter and is the second control input of the device, the input of the scan pulse counter is the third control input of the device, the information inputs of the address register are the bus address of the device data address , a register block, a sampling decoder, a data register, a control node are introduced, and the inputs of the group of anode keys are connected to the corresponding outputs m of the register block, the information inputs of which are connected to the information outputs of the memory block, and the synchronizing inputs with the corresponding outputs of the sample decoder, the first input of the control unit is connected to the counting input of the scan pulse counter and the control input of the register block, the second input with the output of the clock generator, the third input with the synchronizing input of the data register, the first output with the synchronizing input of the sample decoder, and the second output with the counting input of the write pulse counter, controlling the switch and the read / write input of the memory block, the youngest group of the first information outputs of the switch is connected to the information outputs of the control node and the address inputs of the decoder samples, the oldest group with the outputs of the counter for scan pulses, the youngest group of the second information inputs with the outputs of the write pulse counter, and the older group with the outputs of the address register, the information inputs of the data register are connected to the information inputs of the address register, and the information outputs with the information inputs of memory.

 In FIG. 1 is a block diagram of a device for displaying information on a gas discharge display panel; figure 2 shows a timing diagram of the operation of the device; figure 3 shows a block diagram of a control node, figure 4 is a timing diagram of its operation.

 A device for displaying information on a gas-discharge display panel 1 contains a group of 2 cathode keys, a scan decoder 3, a group of 4 anode keys, a memory unit 5, a counter of 6 scan pulses, a block of 7 registers, a sample decoder 8, a clock generator 9, a switch 10, a register 11 addresses, data register 12, counter 13 recording pulses, control unit 14, input 15 of the horizontal synchronization signal, input 16 of the address recording signal, input 17 of the data recording signal, input bus 18 of the data address.

 The control unit 14 contains a counter 19, first, second, third and fourth triggers 20, 21, 22 and 23, an element 24, an OR element 25, the first, second and third inputs 26, 27 and 28, information outputs 29, the first and second outputs 30 and 31.

 The device operates as follows.

 In the "information display" mode, in the absence of a data recording signal at the first control input 17 of the device, a voltage level is formed at the second output of the control unit 14, by which the memory unit 5 is transferred to the "read" mode, and the switch 10 connects information to the address input of the memory unit 5 the outputs of the counter 6 pulses of the scan and the node 14 controls, while the outputs of the counter 6 pulses of the scan correspond to the highest group of the information word, and the outputs of the node 14 control the younger group of the information word. When the horizontal synchronization signal arrives at the third control input 15 of the device for the differential from "1" to "0", information is displayed on the status of the registers of the second stage of the block 7 of the registers and the counter 6 of the scan pulses, overwriting the difference from "0" to "1" is overwritten lines of sign information from the registers of the first cascade to the registers of the second stage of the block 7 of the registers, preparing the control unit 14 to read the next line of sign information from the memory unit 5 and the formation of information words and to display the next line of signographic information at the outputs of the counter 6 pulses of a scan, by which the decoder 3 sweep selects using the cathode keys one of the lines of the gas-discharge display panel 1. The pulses of the generator 9 clock pulses, arriving at the second input of the control unit 14, generate the information word on information outputs of the control unit 14 and the gating signal at the first output of the control unit, on which the sync signal is generated at the outputs of the sample decoder 8 a recording that writes n / S parts of the current line of sign information to the corresponding register of the first stage of block 7 registers. The information word at the outputs of the counter 6 pulses of the scan is the code of the current line, taking a value from 0 to m-1. The information word at the information outputs of the control unit 14 is the code of the sample number n / S of the part of the current line from the memory unit 5, where n is the number of anodes; S is the maximum number of states of the counter 19 of the control unit 14. The change in the information word at the information outputs of the control unit 14 from 0 to S-1 indicates the recording of the current line of sign information in the registers of the first stage of the block 7 registers from the memory block 5.

 Information on the state of the registers of the second stage of the block 7 of the registers and the counter 6 pulses of the scan is displayed by exciting the gas-discharge indicator panel 1 by unlocking one of the cathode keys and applying a high voltage of 400 V to the group of anode keys selected in accordance with the information word of the block 7 of the registers. The indicator glows after a discharge breakdown and a voltage drop of up to 230 V in gas-discharge indicator cells.

 In the "data recording" mode, when the signal for writing the address to the second control input 16 of the device is reset, the counter 13 of the write pulses is reset and the address of the line is written to the address register 11. If there is no data recording signal at the first control input 17 of the device, the device is in the "information display" mode. Upon receipt of the data recording signal to the first control input 17 of the device, data is recorded in the data register 12, the voltage gate synchronized by the pulse generator 9 generates at the second output of the control unit 14, and by means of which the memory unit 5 is transferred to the “write” mode, and the switch 10 connects to the address input of the memory unit 5 the information outputs of the counter 13 of the write pulses and register 11 addresses, while the outputs of the counter 13 of the write pulses correspond to the younger group of information of the word, and the address register 11 outputs the older group of information words, writes data in the memory unit 5 of the register 12 and data on the falling edge of the strobe unit to increase the recording condition of the pulse counter 13. The data recording signals to the first control input 17 of the device are received sequentially until the entire line of signographic information is filled.

Thus, the device for displaying information on a gas discharge display panel performs in the "information display" mode the display of sign information readable from the memory unit 5, and in the "data recording" mode, the display of sign information and line-by-line data recording in the memory unit 5 from the address bus data, and the control cycles of writing data to the memory unit 5 and the display of information is carried out synchronously by pulses from the generator 9 clock pulses. At the same time, in order to prevent information loss during data recording, the periods of receipt of data recording signals and horizontal synchronization signals should be at least
T _zpd 2 x T _gene ;
T _ss 2 x S x T _gene , where T _{gene is} the pulse repetition period of the generator 9 clock pulses;
T _{zpd the} period of repetition of data recording signals;
T _{ss the} period of following of signals of horizontal synchronization.

 Using the proposed device for displaying information on a gas discharge display panel in comparison with the known device will improve the performance of the device due to the synchronization of the data recording cycle with the information display cycle.

Claims (1)

 DEVICE FOR DISPLAYING INFORMATION ON A DISCHARGE INDICATOR PANEL, comprising a clock pulse generator, a sweep pulse counter, the outputs of which are connected to the address inputs of a sweep decoder, the outputs of which are connected to the corresponding inputs of the cathode switch group, the outputs of which are connected to the cathode busbars of the discharge bar panel, connected to the corresponding outputs of the group of anode keys, a memory block whose address inputs are connected to the outputs of the switch, counting input pulse recording counter is the first control input of the device, the clock input of the address register is connected to the reset input of the pulse recording counter and is the second control input of the device, the input of the scan pulse counter is the third control input of the device, the information inputs of the address register are the data bus address of the device, characterized in that a register block, a sample decoder, a data register, a control node are entered into it, and the inputs of the group of anode keys are connected to the corresponding m outputs of the register block, the information inputs of which are connected to the information outputs of the memory block, and the clock inputs to the corresponding outputs of the sample decoder, the first input of the control unit is connected to the counting input of the scan pulse counter and the control input of the register block, the second input of the control unit is connected to the output of the clock generator pulses, and the third input is connected to the synchronizing input of the data register, the first output of the control unit is connected to the synchronizing input of the sample decoder, second the input with the counting input of the write pulse counter, the control input of the switch and the read / write input of the memory block, the youngest group of the first information inputs of the switch is connected to the information outputs of the control node and the address inputs of the sample decoder, the oldest group with the outputs of the scan pulse counter, the youngest group of the second information inputs the switch with the outputs of the counter of recording pulses, and the senior group with the outputs of the address register, and the information outputs of the switch are connected to the address inputs of the block RAM memory, data inputs of data register connected to data inputs of the address register.

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