SU824289A1 - Device for displaying information on crt screen - Google Patents

Description

(54) DEVICE FOR DISPLAYING INFORMATION. : ON CRT SCREEN

The invention relates to automation and computing technology for converting data from computer code into visual alphabet symbols and can be used in the construction of information display tools in automated control systems. Devices are known for displaying information on a CRT screen, containing a register, a decoder, and deflectors stresses Q / j. A disadvantage of the known device using a backlight on a small-format discrete raster, in which the electron beam passes all points of such a matrix consistently and constantly steps out the points belonging to the contour of the selected symbol, is a long symbol formation time due to the necessity of sequential walking around (fixing) all the points raster. In addition, in the known device, an increase in the quality of the symbol voyage by increasing the number of elements of the raster is associated with a sharp complication of the devices themselves. It is also known to have a device for displaying information on a CRT screen containing registers, a decoder, AND elements and deflection voltage drivers. A disadvantage of the known device lies in the identical geometrical dimensions of all displayed symbols, which significantly narrows the field of application of these devices. Closest to the proposed technical entity is a device for displaying information on a CRT screen, which contains a pulse generator, two registers, the output of the first of which is connected to a CRT modulator, and the output of the second - to the output of the first decoder, the output of the first decoder is connected to the first inputs elements and two groups

the second inputs of which are connected to the unit and zero outputs of the trigger, respectively. The inputs of the elements and groups are connected to the first inputs of the switch, the second inputs of which are connected to the output distributor of micro-tacts, and the outputs through the deflection voltage drivers to the deflection system of the CRT, the single input of the trigger I is connected to the output of the first element I, the first input of which is connected with the last output of the distributor of micro-tacts and the first input of the second element I, the second input of which is connected to the single output of the trigger 3.

A disadvantage of the known device is the limited scope of its application,

The purpose of the invention is to expand the field of application of the device by changing the size of the displayed characters.

The goal is achieved by the fact that the device contains a third register, a second decoder, the input of which is connected to the output of the third register and a frequency divider, the first input of which is connected to the output of the pulse generator, the second input - to the output of the second decoder, and the output is connected to the second distributor the first element And the third input of the second element And the control input of the first register, and the fact that the frequency divider contains a pulse distributor, the outputs of which are connected to the first I move the AND of the third group, the outputs of which are connected to the inputs of OR gate whose output is connected to the control input of the pulse distributor.

FIG. 1 shows a functional diagram of the device; in fig. 2 The slope of the function and illumination functions for the symbol in FIG. 3 private polygrams of different sizes.

The device contains a generator of I pulses, the first register 2, the first decoder 3, the trigger 4, the distributor 5 micro-tacts, the switch 6, the formers 7 of deflecting voltages, the second register 8, the first element 9 And, the second element 10 And, the first group of elements 11 And , the second group of elements 12 And, electron beam tube with a deflecting system 13, the third register 14, the second decoder 15, the divider 6 Frequencies, the distributor 17 pulses, the third

. group of elements 18 AND, and element 19 OR, modulator 20.

The formation of symbols is carried out from a particular polygram defined for each symbol, each

Q of which, in turn, is formed from a pair of five-element, trapezoidal micro-polygrams. However, unlike the known and other similar devices, where the sizes of private

5 polygrams are constant; in the proposed device, the dimensions, while maintaining the structure of private polygrams, vary depending on a given attribute.

0 Within the limits of one size with one fixed sign (size code), there are eight such micropigrams (as in the well-known one). A set of micropolygrams and of them

5 private polygrams provides the ability to form and display the entire alphanumeric alphabet.

Since there are only 10 elements in each particular polygram, then 10 bits are enough for storing the code for highlighting a CRT beam for any character of any size. There are eight private polygrams (within the same size), therefore for storing the private code

5 polygrams are enough three bits.

The scale (size) of characters can vary in the general case from 1 to n, therefore, to store an attribute of the scale (size) of characters, Eo G is sufficient.

0 bits

So, the character code that arrives in parallel with the device's input code is (H + jgogjnp bits. The first register 2 serves for storage.

5 GO-ti elemental code. Illumination, the second register 8 - for storing the 3-element code of private polygrams, and the third register 14 - for storing Eog n - the element code of the character size. .

Each output of the first decoder 3 associated with the second register 8 is assigned a certain micropigram, so the outputs

5 eight. At the same time, only two outputs are simultaneously in the excited state, one of which belongs to the first group of outputs of the first: decoder 3 (outputs 1-4), and the second excited output belongs to the second group of outputs (outputs 5-8) of the first decoder 3. Each The group of outputs of the decoder 3 corresponds to its group of elements 11 and 12, which is controlled by trigger 4. This both prepares a certain sequence of formation of micropigrams (from the lowest numbers to the highest ones) that make up a particular polygram, i.e. The 5 microtags to the corresponding inputs of the switch 6 can be connected through the corresponding elements of 12 AND groups only one of the excited outputs of the decoder 3. The 5 microlocks distributor, controlled by pulses from the output of the frequency divider 16, functions in such a way that during each cycle of its operation in the excited the state can only be consecutive. one of his exits. In the initial state, its first exit is excited. The first element 9 I serves to trigger 4 changes its state through each cycle of the distributor 5 microcontacts. The second element 10 I. serves to highlight the pulse of the end of the character. The switch 6 serves to, depending on the state of the output of elements 11 and 12 And the groups of the outputs of the distributor 5 microcontacts, comm. Tied to the inputs of the corresponding formers 7 of deflection voltages so that from the outputs of the latter the deflection voltages decreased, which are necessary to form (within a given symbol size) only the micropigram corresponding to the excited output of the decoder 3.. Each of the n outputs of the second decoder 15 associated with the third register 14 is assigned a certain character size. The outputs of deifrator 15 control the operation of the frequency divider 16. The outputs of the pulse generator 1 are connected to one input of the pulse distributor and to one of the inputs of elements 18 I. The input of the pulse distributor is also the input of the frequency divider 16. The pulse distributor 17 functions in such a way that, under the action of the pulses from the output of the pulse generator 1, only one of its outputs can be successively in the excited state. In the initial state, the first of the n outputs was excited. If there is a signal at the control (second) input, taken from the output of element 19 OR, the distributor 17 pulses is reset to the initial state regardless of the state in which it was before it arrived. no control signal. The second inputs of elements 18 I are connected to the corresponding outputs of the distributor 17 pulses, and the third inputs are connected to the corresponding outputs of the second decoder 15. The outputs of elements 18 AND are connected to the corresponding inputs of element 19 OR whose output is the output of frequency divider 16. This ensures that the frequency divider 16 is such that, depending on the excited output of the second decoder 15, from the output of element 19 OR, pulses with a different follow-up period are taken, multiples of tg (the pulse following period from the output of the pulse generator 1). These pulses, after assigning a different duration of the operation cycle of the distributor S, "micro-tacts," determine the size of the micropigrams, which constitute the partial polygram. The value (scale) of the symbol, by. relative to the initial state, when the pulse with the t-Q following period is removed from the output of element 19 OR, will be K ip / t where tp is the period of pulses from the output of element 19 OR. The output of element 19 OR is associated with the input of the first (shifting) register 2 so that, regardless of the size of the symbol, the illumination code is fed to the CRT modulator 13 simultaneously with the formation of micropalibular elements. grams of the appropriate size. The device works as follows. On a start signal, a generator of I pulses generates a sequence of pulses with a period equal to .Q. The second decoder 15, deciphering the code of the size of the symbol stored in the third register 14, will generate a control signal on only one of the three outlets of its outputs. If the control signal is removed from the first output of the second decoder 15, then the input

7, 824289 distributor of 5 micro-tacts through the first element of the order 18 AND and element 19 OR each pulse is output from the output of the pulse generator 1 (K 1) .5

This is achieved as follows. The first pulse from the output of the generator 1 pulses passes through the first element 1B I in order, since the first output of the second proprietary decoder 15 is excited. The distributor 17 of pulses is in the initial state (its first output connected to the second input 18 And), and the first input of the distributor and the limiter 17 is made delayed, in order to ensure stable operation of the elements 18 AND, the same pulse, the passage through the element 19 OR, is fed to the output of the 16-20 frequency divider and to the control input of the pulse distributor 17, which translate it in a state in which only the first excited {its output the original state). With the arrival of a pulse of 25 pulses from the output of the pulse generator 1, the process is repeated, and from the output of the frequency divider 16, a sequence of pulses is removed with a period tg, which corresponds to a value of Go to characterize the size of the symbol.

If the control signal of the frequency divider 16 is removed from the second output of the second decoder 15 (K 2), js then the input of the distributor 5 microcontacts through the second order element 18 And 19 Or OR 1 every second pulse from the output of the pulse generator 1 40

The first pulse from the output of the generator 1 of the pulses through the first element of the order element 18 does not pass, since the first output of the second decoder 15 is not excited. This impulse is transferable; a CR 45 is a distributor of 17 pulses to its second state, in which only its second output is excited. Since the second output of the second distractor 15 is also excited, the second impulse from the output of the generator 1 travels only through the second order element 18 And, from the output; which, passage through element 19 OR, this pulse translates the pulse distributor to the initial 55 state, and the distributor of 5 micro-tacts to the next state, With the arrival of the following pulses from the output

eight

Oscillator 1 to the input of frequency divider I6 is repeated, which ensures the appearance of pulses at the output of a frequency divider with a period of 2t ...

In the case of excitation of other pins of the second decoder 15, for example, the K-th output, the operation of the frequency divider 16 is similar to that in the described case. The difference is that the pulses from the output of the pulse generator pass only through the corresponding of n elements 18 AND through the Kth element 18 AND, This provides at the output of the control unit a periodic sequence of pulses with a period Ktj,

The Start Trigger 4 signal is set to the O state, which ensures that the potential passes from one of the excited outputs of the first decoder 3 through one of the elements 11 and the group to the corresponding input of the switch 6, the switch 6 starts operating in such a way that 5 micro-strokes, controlled impulses from the output of element 19 IL of the divider 6 frequency of excitations of the output of one of the elements I1 and group are connected only to certain inputs of the deflecting voltage drivers. 7, At the same time, the time of exposure of the signal from the excited output of one of the elements 11 AND of the group to certain inputs of the deflector voltage drivers is determined by the pulse following period from the output of frequency 19 part 19 of the frequency divider 16 (t p K t) Voltage taken from the driver outputs 7 deflection voltages are directly proportional to the input signal duration (tp). The first five pulses from the output share 16 frequencies provide the operation of a switch 6, control of the shaper 7 of the deflection voltages, that from the outputs the latter relieve the stresses of such a form and amplitude, which, entering the deflecting system, ensure the formation of the required micro-polygram of a given size (in accordance with the size code stored in the third register 14)

Claims (3)

The sixth pulse from the output of the 16 frequency divider through the first element 9 And transfers the trigger 4 to the state 1, which provides through one of the elements 1 2 AND group the connection of the second excited output of the first decoder 3 to the corresponding input of the switch 6. This means that the formation of the second micro-polygrams (of the same size as the first), constituting a particular polygram. The formation of this micropigram is also carried out for the cycle of operation of the distributor 5 mn: crocactas. The eleventh pulse from the output of frequency divider 16 is the pulse of the end of the character, which, through the second element -10, transfers the CRT beam to the starting point of a new familiarity and ensures that the new character code is written into registers 2, 8 and 14. Thus, on the CRT screen, The private quotient of a given size is constructed. The time taken to form a private polygram depends on the size of the symbol and is K lOt where K is the scale of the symbol. That is, the smaller the character size, the shorter the time it was formed. Simultaneously with the formation of the deflection voltage of the required amplitude and shape, the pulses from the output of element 1 OR are fed to the input of the first (shifting) register 2 so that the code of the symbol's light goes to the CRT modulator 20, according to which only those elements of the private polygram are highlighted. which constitute the contour of the displayed symbol. Fig. 2 shows, as an example, explaining the operation of the device, the diagrams of deviation of form and amplitude stress, which provide for the formation of private polygrams (Fig. 3) of the same structure, but of different sizes (for K 1 and for). In FIG. 2, the following symbols are accepted: fg, are the pulses from the output of the pulse generator 1; fpw-impulses at the input of the distributor 5 micro-tacts; X and the shape of the deflecting voltages taken from the outputs of the formers 7 of the deflecting voltages; z is the backlight function (for character 2). Thus, with the exceptional simplicity of the technical implementation and high reliability of the formation of symbolic images (as in the well-known one), the predicted device has a much larger field of use due to the fact that the device forms symbols of various sizes. Claim 1. A device that displays information on a CRT screen, contains a pulse generator, two registers, the output of the first of which is connected to a CRT modulator, and the output of the second to the input of the first decoder, the output of the first decoder, is connected to the first inputs of elements And two groups, the second inputs of which are connected to the unit and zero outputs of the trigger, respectively, the outputs of the elements AND groups are connected to the first inputs of the switch, the second inputs of which are connected to the outputs of the micro-clock distributor, and the outputs are black Without deflection voltage drivers — to a CRT deflection system, a single trigger input is connected to the output of the first element I, the first input of which is connected to the last output of the micro-tact distributor and the first input of the second element And, the second input of which is connected to the single output of the trigger, about aphids Often, in order to expand the field of application of the device due to the possibility of changing the size of the displayed characters, it contains a third register, a second decoder, the input of which is connected to the output of the third register. Istra, and a frequency divider, the first input of which is connected to the output of the pulse generator, the second input - to the output of the second decoder, and the output is connected to the input of the micro-tact distributor, the second input of the first And element, the third input of the Second And element and the control input of the first register. 2. The device according to claim 1, which is divided by the fact that the auxiliary divider contains an impulse distributor, the outputs of which are connected to the first inputs of elements AND of the third group, the outputs of which are connected to the turns of the element OR, the output of which is connected to the control input of the pulse distributor. ; and 824 Sources of information taken into account in the examination, 1. USSR Author's Certificate No. 570908, cl. G 06 K 15/20, 1977. 289 2. The authors of the USSR bred 583425, cl. G06 K.15 / 18, 1977. 3. USSR author's certificate according to application No. 2640075 / 18-24, c. SOBK 15/20, 06., 07. 78 (prototype). 1 Puek 17 sixteen GT-TT-h f  f v f  16j it .... u tl | l1 | lt | t || | l2 | tz | gjg |