SU739589A1 - Device for displaying data on the screen of cathode ray tube - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used in information display systems. Devices are known for displaying information on a CRT screen. A device for displaying information on a CRT screen is known, comprising a control unit, a decoder, a memory, a micro-command register, a beam modulation unit, a threshold element, and a linearized error deflection system, the windings of which are connected to digital-analog converters, feedback windings are connected to the logical modulation unit of the beam and the control unit ii. The closest to the technical essence of this invention is a device for displaying information / on the screen of a CRT, containing a block of memory, control, the first output of which Through the coordinate deviation unit, the Pooch is connected to a deflection system of a cathode ray tube, the modulator of which is connected to the first output of the character generator, the control, the input of which is CO and is connected to the second output of the control unit and the first input of the first controllable delays, the second input of which is connected to the second output of the symbol generator and to the first input l of the first OR element, the second input of which is connected to the output of the first waveform-. delay, and the output to the first input of the control unit, the third output of which is connected to the third input of the first OR element, the pulse generator, which is connected to the first input of the second controlled delay unit, the output of which is connected to the first input of the second OR element, whose output is connected to the second input of the control unit, the fourth output of which is connected to the second input of the second controllable delay unit and the second element OR t2 | . These devices characterize with insufficient reliability. The purpose of the invention is to increase the reliability of the device for displaying madia information on the screen of the PLC. This is achieved by the fact that the device contains a switch, two AND elements, an ft key, the first output of which is connected to the first input of the first AND element, the second key key is connected to the first input of the second element —and the second control input of the switch, the corresponding information INPUTS of which is connected to the 1S ijEiixtijiaM counters,) SX 5d TSroy one way with the output of the second element I, the second input which is connected to the first input of the control unit and to the second input of the first element I, the output of which is connected to the input of the memory unit, the outputs rajTdporo are connected to the corresponding information inputs of the switch, and the codes of which are connected to the corresponding information inputs of the symbol generator. devices for displaying information on the screen of the electron of the received tube The device contains a key 1, a control unit 2, a memory unit 3, a 4-character generator, a beam deflection unit 5, an electron-beam tube (CRT. 6, a low-frequency pulse generator 7, a second controllable delay unit 8, an OR element 9, the first block 10 controlled delay, element OR 11, elements. AND 12, 13, counting 14 and switch 15, Each of blocks 8 and 10 of controlled delay can be performed in the form of a series-connected trigger, element And, counter and delay element. arriving at the first input of the block, the trigger is set influence TBaWiJl E, the single state w opens an element AND, through which clock pulses (liia bus diagram not shown) go to the counter input. During the normal operation of the device according to a signal coming after some time to the second block input, the trigger and the counter are set to Oh, if for some reason the device has occurred: a failure has occurred and the sygua has not arrived at the second input of the block, then the COUNTER continues to count the second overflow pulse,

739589 which arrives at the output of the block, and with some delay sets the trigger and the counter to the zero state. Pulse generator 7 is a low-frequency generator that can be performed at a & de counter in which the clock frequency is divided to a value close to the frame frequency. The device works as follows. After the device is turned on and when the key 1 is set to the position a, information is displayed that comes from an external device and is stored in memory block 3. From control unit 2 to generator 7 are received, tact pulses (the bus is not shown in the drawing). At the output of generator 7, pulses appear, the frequency of which is close to the frame frequency. By a pulse from generator 7 with some delay, the block 8 generates a signal that passes through the element OR 9. and sets the elements of the pair of the block 2 rule to the initial states. Next, memory block 3 exchanges signals. with the source information and records the character codes in the memory block 3. Thereafter, the control unit 2 directs the coordinate codes of the initial point of the first symbol to the beam coordinate deflection unit 5, which are converted into analog CRT beam control signals. At the same time, from the control unit 2, through the element OR 11, the inputs of the elements 12 and 13 will receive the read signal of the first symbol code, and the element 13 will open, the symbol code from the memory block 3 will pass through the switch 15 to the 4-symbol generator input. With some delay, necessary for the completion of transients in the deviation of the CRT system, from block 2 of the control. The inputs for the block 10 of the controlled delay and the generator of 4 characters will receive a signal to begin displaying the symbol. On this signal, generator 4 receives the symbol code and; starts its display (provides beam illumination and symbol sweep). The end signal is displayed} 1 character (RMS &) from the output of the 4-character generator passes through the element OR 11 to the inputs of the elements 12 and 13 and block 2 / Geni, and the code of the next character is set at the output of the switch 15. On this signal, the control unit 2 shifts the CRT beam to the point of the next character and, with the necessary DYMAN delay, generates signals for the start of the symbol display, by which the code of the next character is followed by the symbol generator and the epe display starts. The described work process continues. The signal to start displaying the symbol, moreover, is fed to the input of the delay control unit u, which starts counting the time. By an EQE signal, the time count is terminated, the controllable delay unit 10 is set to the zero state. If, as a result of a failure (untimely switching of any memory element in the 4 character generator) EQS does not arrive, then in the controllable delay unit 10 a signal is generated that passes through the OR element 11 to the input of the control unit 2 and And 12 and 13 elements, and device will continue. After displaying this group of characters in control block 2, the end of UHicia signal arrives at the control delayed block 8 and the OR element 9, Block 8 is set to the zero state, and the signal from the output of the OR 9 element in control block 2 will occur preparation of circuit elements to work in the next cycle. If the control unit 2 does not generate a signal for the end of the cycle as a result, then a controllable delayed block 8 will generate a signal that will ensure continued operation of the device. When key 1 is in the b position, signals from the output of the OR 11 element will pass through the AND 12 element to the input of the counter 14. The codes from the outputs of the counter 14 will be used as character codes and pass through Terminal 15 to the inputs of the 4 character generator. The rest of the scheme in this case works the same way. The full alphabet of characters used in this device will be displayed on the screen of the CRT in a strictly defined sequence. If the device works normally. In order to check the correct functioning of the device, it is necessary to verify the image on the CRT screen with a pre-compiled table of characters. fs lo6 This device possesses a higher reliability as compared to the known I2lJ due to the fact that, during the exhumation process, it eats up to quickly produce a contact correct function of the device. formula 3 pB r e rt e n i. A device for displaying information on the screen of a cathode ray tube containing a memory cell, a control unit whose first output is connected to a cathode ray deflection system through a co-ordinator unit of a cathode ray tube, modulator which is connected to the first output of the symbol generator, the control input of which is connected with. the second output of the control unit and the first input of the first controllable delay unit whose second input is connected to the second output of the symbol generator and to the first input of the first OR element, the second input of which is connected to the output of the first controllable delay unit, and the output to the first input of the unit control, the third output of which {is connected to the third input of the first element OR, the pulse generator, the output of which is connected to the first input of the second controllable delay unit, the output of which is connected to the first input of the second element AND LI, the output of which is connected; to the second input of the control unit, the fourth output of which is connected to the second Mrf inputs of the second control delay unit and the second OR element, characterized in that, in order to increase the reliability of the device, it. contains a switch, two AND elements, a counter and a key, the first output of which is connected to the first input of the first AND element and to the first control input of the switch, the second output of the key is connected to the first input tfrdporo of the AND element and to the second control input of the switch corresponding information inputs of which are connected to the outputs of the counter, the input of which is connected to the output of the second element I, the second output of which is connected to the first input of the control unit and to the second input of the first element I, whose output is connected to the input of the block a memory ,, which podyutyucheny outputs to respective data inputs of the switch, the outputs of which are connected to sootvetstvunllff. ..J I

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7-739S898

USCHYMP informational inputs of the hecker-1, Author's certificate of the USSR

mountain of characters ,, ,, ,,, .-,. J 269596, (W.-C 06 F 3/14, 1968.

Sources of information, No. 553639, CP. Q 06 K 15/20, 1975

Taking into consideration the expertise 5 (prototype).

; 2. USSR author's certificate

Claims (1)

A device for displaying information on a cathode ray tube screen, comprising a memory unit, a control unit, the first output of which is connected through a coordinate beam deflection unit ¹⁵ to a deflecting cathode ray tube system, the modulator of which is connected to the first output of the symbol generator, the control input of which is connected to. ^{20 by the} second output of the control unit and the first input of the first controlled delay unit _{t, the} second input of which is connected to the second output of the symbol generator and the first input of the first element is ²⁵ OR, the second input of which is connected to the output of the first controlled delay unit, and the output to the first input control unit, the third output of which is connected to the third input of the first element ³⁰ OR, a pulse generator, the output of which is connected to the first input of the second block of controlled delay, the output of which is connected to the first input of the second element the OR whose output is connected: ³⁵ to the second input of the control unit, the fourth output of which is connected to the second inputs of the second controlled delay unit and the second OR element, characterized in that, in order to increase the reliability of the device, it contains a switch, two AND elements, a counter and a key, the first output of which is connected to the first input of the first And element and to the first control input of the switch, the second output of the key is connected to the first input of the second And element and with the second control input, the switch house, corresponding to The input inputs of which are connected to the outputs of the counter, the input of which is connected to the output of the second element And, the second output of which is connected to the first input of the control unit and to the second input of the first element And, the output of which is connected to the input of the memory unit. the outputs of which are connected to the corresponding information inputs of the switch, the outputs of which are connected with the corresponding “l ♦“ mn * “· '* ¹ .4 7 · 739589 informational inputs of the symbol generator. , „,,. _to . . .. _s