SU868822A2 - Information display - Google Patents

Description

one

The invention relates to automation and computing and can be used in the construction of devices for the representation of information.

According to the main auth. No. 746629 discloses a device comprising a pulse generator, a pulse shaper, a memory block, an address counter, a logic block, a code-time converter, a micro-command register, a function voltage generator, a backlight block, a character register, a comparison block, a trigger, a 2I- element. OR and multivibrator G13.

A disadvantage of the known device is the low accuracy of the display, which depends on the size of the characters and their number on the screen of the electron beam: a tube (CRT). The display accuracy is further reduced more if a known device works with a CRT with a reduced brightness, such as aging. phosphor on the screen of an electron tube or when working with an indicator with a low frequency of information regeneration, as well as when working with projection indicators. In the last, the brightness of images on the edges of the screen is several times

less than in the center. In this case, false characters on the edges of the screen may not be recognized at all.

The purpose of the invention is to improve the display accuracy.

This goal is achieved by the fact that the device has consecutively connected an AND element, a second trigger and a block for changing the size of a symbol whose output is connected to the third input of the voltage generator, the first input of the AND element is connected to the code-time converter output, the second input is the second

15 output of the first trigger, and the third input with the output of the multivibrator.

In addition, a symbol resizing unit contains a matching key, the output of which is connected to the inputs of two resistors, the output of the first resistor is connected to the input of a switching key, the first output of which is connected to a capacitor, and the second output is the output of the unit.

25

FIG. 1 shows a block diagram of the device; in fig. 2 and 3 - the timing diagram of the main signals of the device; in fig. -4 - view of the symbol being formed-, - in FIG. 5 - diagram and 930 change the size of the symbol.

The device contains 1 pulse generator, shaper pulse generator 2, memory block 3, address counter 4 — horse unit 5, code-time converter b, micro-command register 7, function generator 8, beam illumination unit 9, symbol code register 10, Comparison unit 11, first trigger 12, logic element 13 2I-OR, multivibrator 14, logic element 15 I, second trigger 16, block 17 for changing the character size, inputs and outputs 18-43 blocks and devices.

The symbol resizing unit contains a matching key 44, resistors 45 and 46, a switching key 47 and a capacitor 48.

Pulse generator 1 output 20 is connected to the first inputs of a body of 2 pulses and a code-time converter b, output 19 of the driver 2 is connected to the inputs to the generator 1, register 10 of the code, symbol, the first inputs of the triggers 12, 16 and the second input converter -6 connected by output 34 kr to the second input of driver 2, first input of element 15 I, counter 4 of address, and register 7 micro-operator connected by second input with third inputs of driver 2 and converter b, with first inputs of logic block. 5, block 11 s The output and the output of the memory block 3 connected by the inputs to the outputs 26 and 27 of the driver 2 and the output 28 of the address counter 4 are connected by the second and third inputs with the output of logic unit 5 and the output 25 of the driver 2 connected by the information recording outputs 21 and 22 ko the second and third inputs of the logic unit 5 connected by the fourth input to the output 23 of the register 10 and the second input of the comparison unit 11 connected by the third input to the output 31 of the driver 2, the output 32 of which is connected to the first 8 inlet of the function voltage generator 8, The second input to the output 33 of the register 7, the first and second inputs of the element 13 2I-OR, connected by the third input to the output 36 of the trigger 12, connected by the second input to the output 35 of the comparator unit 11, the output 37 of the trigger 12 is connected to the fourth input of the element 13 2I- OR and the first entrance. block 9 of the backlight connected by the second input to the output of the element 13, the fifth input — which is connected to the output 38 of the multivibrator 14 and the third input of the element 15 AND connected by the output to the second input of the trigger 16 connected by the output to the input of the block 17 for changing the size of the symbol plug into the third input of the generator 8 voltages and control voltage

The input inputs of the generator 1 and the register 10 are connected to the input 18 of the device synchronization, the information input of the register 10 is connected to the input 24 of the device, the installation input to zero 39 from the device is connected to the fourth input of the driver 2.

The device works as follows.

At time tg pulse with

Inputs 39 all devices are reset.

At time t, a synchronization pulse arrives at input 18 of the device and starts generator 1, at output 20 of which a push-pull is generated after the pulse: pulses. At the same time, the symbol code from the device input 24 is written to the register 10, where it is stored until the end of the sign formation. According to the signal from the output 21 of the driver 2, the character code from the output of the register 10 through the logic block 5 is entered into the counter 4 of the address. The output number from the output 28 of the counter 4 is fed to the address inputs of the block 3 naimi te. At the same time, at output 26, the imaging unit 2 generates the first interrogation signal of the memory unit 3.

At time tn, determined by the sampling time of the output number from

0 of the memory block 3, at the output of the block 3, an n-bit number is generated that determines the starting address of the symbol firmware.

Record information in memory block 3

5 is produced by two arrays. In the first array, the initial codes of the beginning of the microprogram of the characters are written in the input codes of the characters, in the second array, the control code and the codes of all the character vectors are written sequentially for each character.

At time tj, the address counter 4 is reset with a signal from the output 25 of the driver 2, and at the time. With a signal from the output 22 of the generator 2, the code of the initial address is entered into the counter 4.

. At time tj, the output register of the memory unit 3 is set to the zero state by a signal from the output 27 of the imaging unit 2, which at the output 26 generates a new interrogation signal for the memory unit 3.

5, at the time t, at the output of block 3, a second output number is generated in which the control code of the displayed symbol is recorded. This code is entered into the comparison unit 11 by signaling from the output 31 of the driver 2. In the comparison section 11, the input code from the output of the register 10 and the control code from the memory block 3 are compared. With the p & vestvnost input codes at the output of 35 block 11

No output signal is generated. If the codes are unequal, the output of block 11 comparisons at time t produces an output signal.

At the moment of time t, the state of the counter 4 of the address is incremented by the unit of the least significant bit by the signal from the output 34 of the converter in the binary code, and at the moment of time t | the output register of the memory block 3 is set to the zero state and at the same time a new interrogation signal is generated at the output 26 of the driver 2

At time tg, at the output of block 3 of memory, the code of the first vector of symbol is generated, which, after the signal from output 34 of transducer 6, code-time is entered into register 7 of microcommands and converter 6. At the same time, the same signal increases the state of counter 4 addresses by one more unit younger bit At the moment of time, the code of the first vector of the symbol is entered into the register of 7 microcommands, six bits from which is fed to the function voltage generator 8 to form the sign scanning voltages along the axes X and Y, the 7th digit from the register of microcommands through element 13 2I-OR enters the illumination unit and determines the illumination of the symbol vector, 8-10 bits directly from the memory block 3 arrives at the code-time converter 6, which determines the length of the generated symbol vector. In addition, the same bits are fed to the shaper 2 to form a sign horse symbol, according to which all the nodes of the device are set to the zero state.

From the time of the CR, the generator 8 begins to form the voltage sweep of the first vector of the symbol along the axes X and Y.

At time t, the output register of memory block 3 is set to the zero state and at the same time a new polling signal is generated from memory block 3.

At time t, the output of memory block 3 generates a code for the second vector, which is stored in the output register of block 3 until time i.

At time t. The code-time converter 6 generates a signal for the end of the first vector, according to which the code of the second vector from the output register of memory block 3 is entered into register 7 of micro-instructions, code-time converter 6, and the address code at the output of counter 4 is increased by one more unit. From this point in time, the imaging unit 8 begins to form the sweep voltages along the axes X and Y for the second symbol vector. I At time t, signals 26 are generated at outputs 26 and 27 of generator 2.

interrogation and installation in the zero state of the memory block 3.

At time t, at the output of memory block 3, the code of the third symbol vector is generated, which, according to the signal of the end of the second vector at the time point, is entered into register 7 of mic-, rokomand and converter b in time. From this point on, generator 6 begins to form the sweep of the third vector symbol

o etc.

at time t, block 3 generates an output number containing zeros in all bits. The three most significant bits of this number are inserted into shaper 2 to form the signal for the end of a symbol from the signal of the last vector at time tja. By the end-of-symbol signal, all device nodes are reset. I In addition, this signal

0 arrive at the external information exchange device for calling the code of the next character.

If there is a malfunction in the device, for example, in a logic block (absence of one or several bits), another code is formed at the output of the address counter 4, which does not correspond to the input code.

0

The validation of the display of the symbol is performed from the moment of time t-j, when the control code of the symbol from the output of memory block 3 by the signal from output 31 of the driver 2

5 is entered into comparator block 11. In comparison unit 11, the input character code from the register output 10 characters is compared with the control code recorded in memory block 3. In case of inequality of codes at output 35 of the block

0 11 comparisons, a control signal is generated that switches trigger 12 from a zero to one state. In this case, the output 36 of the trigger 12 is set to zero level of voltage, and the output 37 is positive, which is fed to the input of the element 13 2I-OR and the beam illumination unit 9. In the positive periods of operation of the self-oscillating multi-vibrator 14, the element 13 2-OR opens and passes the code for the illumination of the simol vector to the first input of the beam illumination unit 9. To the second input of the block 9 from the output 37 of the trigger 12

5, a positive level arrives, which additionally increases the amplitude of the output eg; xeni of the illumination unit 9. At the same time, the symbol on the CRT screen is displayed with increased brightness and with a blinking determined by

0 by the frequency of operation of the multivibrator 14. At the same time, the positive voltage levels from trigger 12 and multivibrator 14 go to the two inputs of the element 15 And to the third input

which receives a signal from the output 34 of the Converter 6 code-time. At the output of element 15 I, the start signal T1 of igger 16 is extracted, from output 40 of which a positive level goes to block 17 for changing the size of the symbol.

The symbol resizing unit operates as follows.

A positive signal from the output of the trigger 16 opens the key 44 and closes the key 47. Resistors 45 and 46 provide the necessary operation of the keys 44 and 47.

The private key 47 disconnects the capacitor 48 from the main integrating capacitor of the generator 8, reducing its total integrating capacitance, which leads to an increase in the c1Mplitud of the output voltage of the sign sweep. In this case, on the screen of a CRT, a symbol is formed with varying sizes in time with the operation of the multivibrator 14.

Thus, if there is a mismatch, (the code recorded in register 10 with the control code recorded in memory block 3, the character of the CRT screen will be displayed with increased brightness, flashing and variable dimensions.

If the codes at the input of the comparison block 11 are equal, there is no signal at its output. In this case, the trigger 12 is in the initial state, and / at its output 36 a positive level is established which allows the signal vectors of the character vectors to pass through the second input —And element 13 2I-OR. The zero level from the output 3 of the trigger 12 excludes the influence of the multivibrator 14 on the operation of the backlight unit 9 and the symbol size changing unit 17; The symbol will be displayed without blinking with constant brightness and constant RD-11er1 "1i.

Compared with the known device, the proposed device has

the increased accuracy of the information display, which consists in the fact that in it the control of the displayed symbols is performed not by the last vector of the symbol, which may be small. It is sized and not easily distinguishable on the screen, not a CRT, but starts from the beginning of the formation of the symbol and covers its entire outline. In addition, the symbol is controlled not only by changing the volume Q of the brightness, but also by changing dimensions. Both of these features allow to significantly expand the field of application of the proposed device, improve the display accuracy and its reliability.

Claims (2)

1. The device for retrieving information from auth. No. 746629, that is, in order to improve the display accuracy of the device, the sequentially connected element I, the second trigger and the block for changing the character size, the output of which is connected, are entered into it. with the third input of the voltage generator, the first input of the element I is connected to the output of the converter in a time, the second input to the second output of the first trigger, and the third input to the output of the multivibrator. 2. The device according to claim 1, which means that the block for changing the size of the symbol contains 5 a matching key, the output of which is connected to the inputs of two resistors, the output of the first resistor is connected to the input of the switching key, the first output of which is connected to 0 is a capacitor, and the second output is a block output. Sources of information taken into account in the examination  1. USSR author's certificate No. 746629, cl. G 09 G 1/08, 1978. Hi ..... t, o ", .. t. " / T t, e f "