SU1410090A1 - Device for displaying information on crt screen - Google Patents

Abstract

The invention relates to automation and computer technology and can be used in computerized devices and information display systems. The purpose of the invention is to increase the reliability of the displayed information - achieved by introducing the control of the functioning of the device, which allows correcting errors of any multiplicity within the formation of micro-polygrams of a different structure, and is accomplished by introducing the control unit 10 and the pulse former 9, taking into account the structure of the micro-polygram formed, the mode setting unit 17 work and elements 11-16 with corresponding functional connections. 1 hp f-ly, 6 ill. (L

Description

with

: The invention relates to automation and computing technology and can be used in output devices from a VM and in an INF KH display system.

The purpose of the invention is to increase the accessibility of the displayed information.

The proposed device implements a procedure for flexible control of the functioning of the device, which takes into account the change in the structure of micrograms. The error signal is formed in accordance with the expression

3 (a, aga ,, a4aja4Vl, agaja Va, ata, a) Ap, V (a, aja, a, Va ,,, aja, a, Va, aja, a) A, (1)

de a, -a signals at the outputs of the unit forming the functions of the excitation, corresponding to the excitation functions in the X and Y coordinates, given: a, a to the sum- 20 peacekeeping inputs of the formation of the gels of the deflecting functions, a2., a - for subtraction PI (p, vPa (b2Vb3Vb vb5) vpjA (b2Vbj) (bjVb4); (2)

Pe P / (b, Vbj), (Vb4) Vp / (b2Vb3)

b g - signals at the outputs of the pulse distributor, |

matching numbers

elements in molded

micropigram, bj

 .35

p - signals at the outputs of the block

the OR elements corresponding to the numbers of the partitioning groups of the set are formed by the device micro- 0 polygrams: s, V Cj,

Cjv with

V e.

+ V with, V Cg, e "o

(four)

, V Cg V With VC

45

TO.

signals at the outputs of the pulse distributor, with memory, corresponding to the numbers of micropolygrams in the set, s,

 ((.1 shows the functional of the device, figure 2 shows the distribution diagram, figure 3 shows the functional location of the choice of features of the counterfig. 4 shows the functional diagram of the ontrol, FIG. 5 shows the functional diagram of the mode setting block.

50

55

S

The inputs of these same formers, and; | | 0,1 |, signs of controlling the formation of elements in the micropigram, respectively, coinciding and not coinciding in direction with the axes of the X and Y coordinates,

(3)

Figure 6b shows a set of micropigrams and diagrams of the corresponding deflection stresses along the X and Y coordinates.

The device contains 1 pulse generator, register 2, first pulse distributor 3 (with memory), block 4 of OR elements, second pulse distributor 5, converter of 6 codes, drivers 7 and 8 of deflection voltages along coordinates X and Y, driver 9 impulses, control unit 10, elements 11-16, unit 17 for setting operation modes. Positions 18, 19, and 20-22 designate the inputs of the elements of the device.

Imaging is carried out by highlighting the elements of a certain generalized figure, which, in turn, is composed of a set of elementary figures - micropigrams (Fig. 6). Each image (symbol) is associated with a certain subset of micropigrams, i.e. for each image of the path of the beam. Individual. First twelve bits

the twenty four-digit character code constitutes the micro-polygram code, which is entered into the triggers of the 3-pulse distributor, and the second two

The eleven bits are entered in register 2 and constitute the highlight code. Each digit of the micropigram code corresponds to its own micropolygram. Moreover, micropigram with numbers 1 and 2 - six-element, - four-element, 6 - n thielement.

The impulse generator 1 takes a periodic sequence of pulses with a period of ut, which determines the time it takes to form one element of a micropigram.

The distributor of 3 pulses operates in such a way that the control signal successively arises only at those of its outputs, which correspond to the micro-polygrams, necessary for the formation of the contour of a given 2Q wave. For the synthesis of symbols, micropigrams are selected from the set of possible, in which the maximum number of elements is included in the contour of the displayed symbol.

Since the number of elements making up a micropigram is different, then. the duration of the signals at the outputs of the distributor 3 pulses are also different-. on and is determined by the number of elements included in the formed micropigram. The same determines the duration of the operation cycle of the distributor 5 pulses, the overflow pulses of which control the operation of the distributor 3.

Block 4 of the OR elements is designed to control the cycle time of operation of the distributor 5. Block 4 is connected to the corresponding outputs of the distributor 3 and implements a logic vpangeniya (4).

The pulse distributor 5 is adaptive and contains counter 23, decoder 24, prohibition element 25, AND 26-30, OR 31, 32 (figure 2).

Code converter 6 is a series of interconnected blocks of OR and switching elements. Converter 6 serves to switch the 5 outputs of the distributor 5 pulse-. depending on the presence of a signal at one of the outputs of the distributor 3 at a certain 1 st inputs of the formers 7 and 8 of the deflection functions through the elements 11-14. Moreover, from the outputs of the formers 7 and 8, the voltages necessary for the formation of only a micro-polygram are removed.

35

40

45

55.

0

5 Q 5

. .

five

0

five

corresponds to the excited output of the distributor, 3 pulses.

The pulse shaper 9 (FIG. 3) is intended to form the signs of controlling the functioning of the device at each work cycle depending on the structure (type) of the micro-polygram formed. The shaper 9 consists of the elements OR 33-39 and AND 40- 46. Its connections and logic of operation are described by logical expressions (2) and (3), which block 9 implements on its outputs 9, and 9 signals These correspond to the characteristics p and p of the control of the formation of elements in the micropigram, respectively, coinciding and not coinciding in the direction with the X and Y coordinate axes.

The control unit 10 (FIG. 4) is intended for analyzing the control features and output combinations of the excitation functions generated in block 6, in the case of a fault occurrence, the block 10 prepares the output signal. Block 10 consists of the elements NOT 47–50, AND 51–58, OR 59–61, AND – NE 62, 63. The logic of the operation of the block and its connection is described by expression (1).

The unit 17 for setting operation modes (FIG. 5) establishes, depending on the presence of a signal Error, two modes of operation of the device: Formation and Correction. In the Correction mode, ok 17 allows you to correct errors of any multiplicity within: a micropigram. The mode setting unit 17 contains triggers 64, 65, delay elements 66, OR 67, 68, AND 69, counters 70, 71, and comparison element 72.

The modes of operation of the device are determined by the state of the trigger 65 together with the state of the trigger 64 according to the table.

In the initial state, the triggers 64 and 65 are in the O state, and

the device is in the Forming mode In this mode, as the micro illumination code of the micro polygram in register 2 is shifted by the action of pulses from the generator 1 output, the counter 71 performs the counting of properly formed micro polygram elements. The change in the mode of operation of the device by block 17 is carried out when the control block 10 generates a signal Error, trigger

64 transitions to state 1 for the time required to establish a CRT beam at the origin from any point of familiarity. To this end, a single output trigger 64 is connected to the installation inputs of the drivers 7 and 8, the distributor 5 pulses and through the element 66 delay with zero input 1 of the same trigger. The delay element 66 is selected based on the conditions for ensuring the return of the beam to the origin. In addition, the single output of the trigger 64 is connected to the single input of the trigger 65 and through the OR element 68 with the installation input of the counter 70. The counter input of the counter 70 through the element 69 and the signal from the single output of the trigger 65 is connected to the output of the pulse generator 1. Thus in the Correction mode counter

70, the counting of well-formed elements of the same micropigram is carried out. The outputs of counters 70 and

71 are connected to the inputs of the comparison element 72 and, in the case of the counter states 70 and 71, the comparison element 72 completes the signal at its output. On this signal trigger

65 through the element OR 67 and the counter 70 through the element SHS 68 are set to the state O, which corresponds to the transition of the device from the Correction mode to the Formation mode.

Elements 11-14 are used to disconnect the outputs of the block 6 forming the excitation functions from the inputs of the formers 7, 8 of the deflecting functions for the time the device switches to the Correction mode (for the time of return of the beam to the beginning of the familiarity). For this, one inputs of the elements 11-14 are connected to the zero output of the trigger 64 of the mode setting unit 17.

Elements And 15, 16 are used to turn off for the period of the Correction mode, respectively, the input and output register. pa 2 and pause at the time of processing the code light. To this end

one of the inputs of the elements, and 15, -16 connected to the zero output of the trigger 65. The device operates as follows.

t / character code enters device

at input 19. The first twelve bits of this code constitute the code of the micro-polygrams and are entered into the triggers of the distributor of 3 pulses with a memory, and the second twelve bits are entered into the register 2 and constitute the light code. The start-up signal on input 18 starts the generator of 1 pulses, with

the output of which pulses arrive at the input of the distributor 5 pulses.

At each cycle of operation of the device, the corresponding input of the converter 6 from one of the outputs (corresponding to the number of the formed micropigram element) of the distributor 5 receives a signal which, together with the signal from One of the outputs (corresponding to the number of the formed micropigram) of the distributor 3, ensures that the converter 6 generates the function code in excitation of one element of the formed micropigram. This code through

elements 11-14 and 14 controls the formers 7 and 8. Triggers 64 and 65 of block 17 are in the zero state, and elements 11-16 are unlocked, which corresponds to the mode of operation of the device Formation. With the output of shapers 7 and 8, the deflecting voltages X (t) and Y (t) are removed, which, through appropriate systems of deflection of the CRT (not shown), moves the beam of the CRT along the contour of the required micro-polygram. Simultaneously with the formation of the elements of the micropigram, under the action of pulses from the output of the generator 1, through the element 15 and from the output of register 2 through element I. 16, the CRT modulator receives signals Z (t) that control the illumination of the CRT beam. In accordance with these signals, only those elements of the micropigram are highlighted that make up the outline of the image. The output of the element 15 is connected to the counting input of the counter 71 of the mode setting unit 17 so as to ensure the count of the number of correctly formed micropigram elements

At the end of the formation of a micro-polygram from the output of the distributor 5 pulses, an end pulse is removed

cycle. The duration of the cycle of operation of the distributor 5 is different, since the number of elements of the micropolygram set is different (Fig.6). Establishment of

The number of micropigram elements

the duration of the signal at the corresponding input of the distributor 3 (as well as the duration of the operation cycle of the distributor 5 pulses) is connected by connecting the outputs of block A of the CRPD elements to a specific input of the distributor 5. Depending on which output of the block 4 of the OR signal is removed, the duration the operation cycle of the distributor 5 and are selected by the shaper 9 for monitoring the formation of the elements of the micropigram. The pulse of the end of the cycle sets the counter 71 of the block 17 to the initial state, and the distributor 3 to the next state. This is ensured in the next cycle of operation of the pulse distributor 5 forming the excitation functions at the outputs of the converter 6 for the next necessary micro-polygram, 1

If the formation of any element of the micropigram fails, then according to the logic of the shaper 9 and the control unit 10, described by expressions (1) - (4), an error signal occurs at the output of the control unit 10, This signal translates trigger 64 17 in a single state, which ensures installation of a distributor 5 in O and returning the beam to the beginning of the familiarity. At this time, the outputs of the converter 6 are disconnected from the inputs of the corresponding drivers, since the zero output of the trigger 64 is connected to the other inputs of the AND 11-14 elements. Converting the trigger 64 to the single state also ensures that the trigger 65 switches to the single state the This corresponds to the transition of the device to the Correction mode. In this mode, the element And 15 is blocked by the absence of a resolving potential at one input. The pulses from the output of the generator 1 to the input of the counter 71 are not received. Thus, the counter 71 recorded the element number of the micropigram, on which the first error was detected. Since the flip-flop 65 is in the state 1, the control signal for the beam illumination to the CRT modulator from the output 22 through the element 16 does not come. Element AND 69 opens and counter 70 begins counting the number of micropigram elements generated in the Correction mode. The counting of the elements of the micropigram by the counter 70 is carried out until the values of counters 70 and 71, i.e. to the element number of the micropigram on which the failure was detected. Comparison element 72 signals the signal that the counter 70 is reset to its initial state through the element OR 68, and the trigger 65 through the element OR 67 is brought to the zero state. This corresponds to the transition of the device to the Formation mode. Elements 15 and 16 are unlocked, and the CRT modulator on output 22, under the action of pulses from the output of generator 1, receives a counting code starting with the number of the element on which the failure was detected. The process of forging a symbol continues until the next pulse of the end of the cycle is generated from the output of the distributor 5 pulses. Thus, correction of single errors within a single micro-polygram with any structure (with any number of micro-polygram elements within the selected set) is carried out.

In the Correction mode, errors are also possible which are detected by the shaper of 9 pulses and the control unit 10. In this case, at the moment of detecting an error, the signal from the output of block 10 is removed, which transfers the trigger 64 of block 17 to state 1, the trigger 65 of its state does not change, and through the OR 68 element, the counter 70 is reset, the CRT beam is converted to origin of familiarity. The distributor 5 pulses is reset (none of its outputs are excited). With the arrival of the next pulse from the output of the generator 1 to the corresponding input of the distributor 5 pulses, the formation of a micropigram starts from its first element to the element on which it was detected; failure in the Formation mode. Next, the operation of the device occurs as described.

Counter 71 always counts micropigram elements,. well formed in Forming mode. If one more error occurs before the completion of the formation of the same fIcKgroup IY, the device will switch to the Correction mode and will function in this mode | Mej until the counter state 70 is not

Coincides with the new state of the counter 71, I

Upon completion of the formation of the last of the required micropigram micrograms for a given symbol, a signal is taken from the output of the memory distributor 3 with a signal. End of formation (not shown), according to which the device is prepared to receive the next character code.

Invention Formula

Claims (2)

1, A device for displaying information on a cathode-ray tube (CRT) screen, comprising a pulse generator, a register, first and second pulse distributors, a block of OR elements, a code converter, and deflecting voltage generators in X and Y coordinates, the outputs of which are the outputs of the device for connecting to a deflecting system of a CRT, the output of the pulse generator is connected to the clock input of the second distributor connected to the outputs of the block of elements OR, the outputs of the pulse shaper are connected to control inputs the control unit, whose information inputs are connected to the converter outputs connected to the first inputs from the first to fourth elements And, the second inputs of which are connected to the BTopoi iy output of the mode setting unit, the information input of which is connected to the output of the control unit, the outputs from the first on the fourth elements And are connected with 15. the control inputs of the deflecting voltage formers on the X and Y coordinates, the first control input of the mode setting unit is connected to the output of the second pulse distributor, j 20 ss, the output of the pulse generator is connected to the first input of the fifth element And the clock input of the mode setting unit, the second control input of which is connected to the output of the fifth 25 And elements connected to the control input of the register, the output of which is connected to the first input of the sixth element AND, whose output is the output of the device for connection to the CRT controller, the third output of the operating mode setting unit - / to the second inputs nth and sixth elements And, pulse generator, informational inputs of which are connected to the outputs of the block of elements OR, whose inputs are connected to the outputs of the first distribution 2. The device according to claim 1, of tl and h puller connected to the inlet so that the formation task setting block of the mode converter contains two counters, the control inputs of which are connected to the outputs of the second pulse distributor,. the information inputs of the first pulse distributor and the register are the information input of the device, the start input of which is the input of the pulse generator; the control input of the first pulse distributor is connected to the output of the second pulse distributor, characterized in that, in order to increase the reliability of the displayed information, the device contains a pulse shaper, a control unit, six AND elements, and a mode setting unit, the first output of which is connected to the control inputs of the driver clone constituent-stress by X coordinate and Y raspredelitelt and second pulses, the outputs of which are connected to the control input of the ishulsov, data inputs koto connected to the outputs of the OR block, the outputs of the pulse former are connected to the control inputs of the control unit, whose information inputs are connected to the outputs of the converter - codes connected to the first inputs from the first to the fourth elements And, the second inputs of which are connected to the BTopoi iy the output of the unit for setting operation modes, the information input of which is connected to the output of the control unit, the outputs from the first to fourth elements I are connected to 15. the control inputs of the deflecting voltage formers on the X and Y coordinates, the first control input of the mode setting unit is connected to the output of the second pulse distributor, the output of the pulse generator is connected to the first input of the fifth And element and the clock the input of the mode setting unit, the second control input of which is connected to the output of the fifth 25 And elements connected to the control input of the register, the output of which is connected to the first input of the sixth element AND, whose output is the output of the device for connection to the CRT controller, the third output of the operating mode setting unit - / to the second inputs nth and sixth elements And, 2 The device according to claim 1, of which is 35 S so that the block for setting the operation modes contains two counters ka, comparison element, two triggers, AND element, two OR elements and a delay element, whose output is connected to the first input of the first trigger, the second input of which is the information input of the block, the first output — the second output of the block, and the second output — the first output of the block and connected to the input of the delay element, the first input of the first OR element and the first input of the second trigger, the first output of which is the third output of the block a, and the second output connected to the first input of the AND element, the second input of which is the clock input of the block and the output is to the counting input of the first counter, the control input of which is connected to the output of the first OR, the second input of which is connected to the output of the comparison element and the first input of the second element OR, the output of which is connected to the second input of the second trigger, and the second input is the first control input of the block, and the outputs of the second count-block and connected to the third input sensor are connected to the inputs of the first body of the first element OR, to the controller of the comparison element, the inputs of the second input of the second counter, the counting input of which is connected to the outputs of It is the second control of the first counter, em17 ..l ami „J -ZL fpas .5 mfO ffff ..