SU960916A1 - Device for displaying data on cathode-ray tube screen - Google Patents

Description

The invention relates to an information display technique, can be used in the construction of graphic and universal displays and video terminals of television type.

A device for displaying vectors on a television receiver screen is known, which contains a block of registers of INPUT parameters, connected to the signal bus of input parameters, a memory block and a control unit 1.

The disadvantages of the known device are the poor quality of the formed image and the complexity of the implementation of the device.

The closest in technical essence to the invention is a device for displaying information on a television indicator screen, comprising an input parameter register unit, connected to an input parameter signal bus, serially connected string sampler connected to a synchronization signal bus in rows, and a first computing unit, Coordinate code conversion unit connected in series, connected to the synchronization signal buses in rows and fields, and the second computational

a roll, as well as a switch and a memory block 2.

A disadvantage of the known device is the display of only one vector during the field sweep period. In a known device, it is impossible to display more than one vector, since the parameters defining the law of reading information from

The 10 blocks of memory remain constant during the field sweep period, and are determined by the value of the angle of inclination of the vector.

The purpose of the invention is to expand the scope of application of the device by increasing the amount of information displayed during the field sweep period.

The goal is achieved

20 in that a device containing a block of input parameters registers connected to the signal bus of input parameters, a serially connected string detector, connected to the synchronization signal bus in rows, and a first computing unit connected in series to a coordinate code conversion unit connected to the buses the synchronization signals in rows and fields, and the second computing unit, as well as the switch and the memory block, are connected in series, the video field shaper of the local field and the inputs of which are connected, respectively, to the outputs of the switch, the line discoverer and the conversion unit; the coordinate codes, the second output - to the input of the memory unit, and the second control unit: the third and third inputs of which are connected to the synchronization borers in rows, by fields and control signal; the first and second outputs correspond respectively to the first input of the spider and the second input of the memory unit, the second input of the switch is connected to the output of the BLK, and: reg; and the input parameters, and the outputs to the third input of the memory unit and the second inputs of the first and second computational blocks, the third inputs of which are connected, respectively, with the outputs — the coordinate code conversion unit and the line sampler, the fourth and fifth groups of memory block inputs are connected, respectively, to the outputs of the first and second computation blocks. The control unit contains a single pulse former, the inputs of which are the first and second inputs of the unit, and the output the first output of the unit, triggers whose inputs are connected to the third input connected to the first inputs of the counters, the second inputs of the counters are connected, respectively , to the second and fourth inputs of the block, the outputs of the flip-flops are connected to the first inputs of the H elements, the second inputs of which are connected to the first output of the block, the outputs of the meters are connected to the inputs of the decoder, the output of which and the outputs of the AND elements s to the second output of the block. FIG. D is a block diagram of the device; Fig. 2 is a block diagram of a control unit. The device contains a block of 1 input parameter registers, a line sampler 2, a Coordinate code conversion block 3, a switch 4, a first computation block 5, a second computational block 6, a memory block 7, a local video driver 8, a control block 9, a bus 10 (Input parameter signals, 11-line synchronization signal. Line synchronization, field synchronization bus 12, control signal bus 1, output signal bus 1. Bloc. Control unit 9 contains a driver 15 for a single pulse, the first 16 and the second 17 t Iggers, the first 18 and second 19 elements I, the first 20 and second 21 counters, the decoder 22, the input signal bus 23, the output bus 24 and 25 signals, the Input Parameter register unit 1 is connected to the input parameter signal bus 10. Inline sampler 2 connected to the bus 11-synchronization signal in rows, are sequentially connected to the first computing unit 5. The coordinate code conversion unit 3, connected to the buses 11 and 12 of the synchronization signals in rows and fields, respectively, is sequentially connected to the Second computing unit com 6. A local field 8 video signal shaper is connected in series, the inputs of which are connected, respectively, to the outputs of the commutator 4, the line sampler 2 and the coordinate coordinate unit 3, and the second output to the input of the memory unit 7, and the control unit 9, the second The third and fourth inputs of which are connected, respectively, to buses 11 and 12 of the synchronization signals in rows L across the fields and the control signal 13, and the first and second outputs to the first input of the switch 4 and the second input of the block, 7 memory, respectively. The second input of the switch 4 is connected to the output of the block 1 of the input parameter registers, and the outputs to the third input of the memory block 7 and the second inputs of the first 5 and second 6 computing blocks, the third inputs of which are connected, respectively, to the outputs of the coordinate conversion block 3 and the lower case sampler 2. The fourth and fifth inputs of the memory-7 block are connected, respectively, to the outputs of the first 5 and second 6.calculation blocks. The first and second inputs of the single pulse shaper are the first 12 and second 13 inputs of the control unit, the output of 24 bp of control. The first and second inputs of the first 16 and second 17 triggers, the first inputs of the first 20 and second 21 counters are connected to the third bus 23 of the control unit. The second inputs of the first 20 and second 21 meters are connected, respectively, to buses 12 and 11 of the synchronization signals in the fields and in rows. The outputs of the first 16 and second 17 flip-flops are connected, respectively, to the inputs of the first 18 and second 19 elements And, the second inputs of which are connected to the output of the former 15 of a single pulse. The outputs of the first 20 and second 21. counter are connected to the inputs of the decoder 22, the outputs of which are connected to the output bus 25. The outputs of the first 18 and second 19 elements I are connected to the output bus 25. The device for displaying information is operated as follows. Lowercase sync pulses from the bus 11 synchronization in rows

are fed to the row sampler 2, as well as the coordinate code conversion unit 3 and the control block 9, which also receives field clock pulses from the sync signal bus 12 across the fields. The horizontal sampler 2 and the coordinate code conversion unit 3 are logic circuits pulses, the number of which determines the position of the beam of the cathode ray tube on the direct course of the television sweep, respectively, horizontally and vertically. These pulses are fed to the respective inputs of the first 5 and second 6 computational units and the imager 8 of the local field video signal. The information about the page of the displayed information is received from the bus 10 of the input parameter signals to the block 1 of the input parameter registers. This information includes information about the image stored in block 7 of the image, as well as the parameters defining the division of the television raster into. local fields, and parameters defining the position of the recorded image in each local field. The outputs of block 1 of the registers of input parameters are connected to the inputs of the switch 4, operating in multiplex mode.

The device for displaying information operates in the recording mode of the information page and the display mode of the information page.

Information is recorded by a signal from the control signal bus 13. This pulse signal arrives at the synchronizing input of the first trigger of the driver 15 of the single pulse of the control unit 9. Synchronized input of the second trigger is connected to the bus 12 of the synchronization signal by fields. Initially, both of the flip-flops are in the state O. At the input D of the first flip-flop a constant signal unit is applied. Therefore, the pulse arriving at sync. the first trigger input from the bus 13 of the control signal transfers the first trigger to state 1. Since the direct output of the first trigger is connected to the D input of the second trigger, the first pulse from the bus of the synchronization signal 12 then converts the second trigger to the second in state 1. At the same time, the zero potential from the inverse output of the second trigger is applied to the R input of the Setup in O of the first trigger. As a result, the first trigger is set to state O and will be held there all the time while the second trigger is set to state 1. Another pulse e of the bus 12 synchronization across the fields of the second trigger

will be set to state O, since at its D input there will be zero potential. Thus, the duration of the positive pulse at the output 24 of the former 15 single pulse

control unit 9 is equal to one field sweep period. The signal from the output 24 of the control unit 9 is fed to the input of the memory unit 7, where it determines the operation mode: - signal 1 corresponds to the information recording mode, signal O - to the read mode. It follows from what has been said / that during the next period after the signal from the bus 13 of the control signal of the field

A sweep 5 will record the information page in memory block 7. The information is recorded in the memory unit 7 in such a way that when it is read by linearly varying codes corresponding to vertical and horizontal scanning, information adequate to the recorded one is displayed on the television raster. Simultaneously with the recording of the information page, the television raster is divided into local fields, which are sections of a rectangular shape, the recorded information in each of which is independent of the information recorded in

0 other local fields x. The number of local fields is determined by the specificity of the displayed information page and is limited by ergonomic criteria.

C The splitting of the television Raster into local fields is carried out by the shaper 8 of the video signal of the local field, which operates in accordance with the expression

{R-Ry) A. (N-pr) i lk, l, (T)

40

where L is the sign of the logical multiplication; p, n - linearly varying codes, respectively, the frequency of lines and fields, the instantaneous values of which determine, respectively, the pulse rate of the horizontal sampling of the television raster and the line number of the television raster

at the given moment of time, PQ, are codes defining in the plane of the television raster, respectively, horizontally and vertically, the position

the origin of the TV raster coordinate system for a given local field; -k Fc / distance codes from the origin of the coordinate system of the television raster to, respectively, the first, second, third and fourth sides of the local field.

Claims (2)

As can be seen from expression (1), the forator 8 of the signal of the local image field forms a video image signal of the local field, whose position in the plane of the television raster is determined by the source information. The generated video signal of the local field image from the formation of the video signal body 8 of the local field is fed to the sample input of the memory block 7. In other words, the operation of memory block 7, either for writing or for reading information, is permitted only during the time of exposure of this local field. In this case, the values of the codes k.k, k.k are chosen in such a way as to avoid overlapping local fields. At the initial moment of time, the control inputs of the switch 4 from the output bus 25 of the control block 9 are given signals permitting the passage from the block 1 of the registers of the input parameters necessary for display on the television raster of the first local field. From the expression (1) it follows that to obtain the video signal of the image of the local field, it is necessary to compare the codes of the sizes of the local field with the current: values of the codes of the sweep functions horizontally and vertically. The results of comparisons from the output of the imaging unit 8 via the input bus 23 enter the control unit 9 on the first 16 and second 17 triggers and on the first 20 and second 21 counters. At the same time, the start and end signals of the local field illumination, vertically and horizontally, are respectively sent to the installation and reset inputs of the first 16 and second 17 flip-flops, and the signals for the end of the local field's illumination, vertically and horizontally, respectively to the first 20 and second 21 counters. Codes from the outputs of the first 20 and second. 21 counters are fed to the inputs of the decoder 22, where they are converted into a signal at one of the outputs. Connecting the second inputs of the first 20 and second 21 counters, respectively, to buses 12 and 11 of the synchronization signals and fields and in rows to zero the counters due to the need to ensure an unambiguous correspondence between the signals on B1 # during the decoder 22 and the parameters passed by the switch 4. The decoder 22 operates in such a way that at the initial moment of time and during the time of illumination of the first locomotive; about the floor under the action of the control signal from the decoder 22, the commutator 4 comes from block 1 of the input registers The parameters that determine the position on the television raster of the first local field. When the start signals of the first local field arrive at the control unit 9 from the imaging unit 8, the first 16 and second 17 triggers are set to state 1. Since the outputs of the triggers 16 and 17 are connected to the inputs of the elements 18 and 19 and the latter perform a match operation, then the output of elements 18 and 19 will be signal 1. This signal goes to switch 4 rto output bus 25 (see figure 2) and allows passage from block 1 of the input parameter registers to block 7 of information memory, which is written in the first local field . Under the action of the signal from elements 18 and 19, switch 4 transmits from block 1 of registers, input parameters parameters ensuring the formation of the first 5 and second 6 computational blocks of linearly varying codes corresponding to the horizontal and vertical scanning of the television raster. The linearly varying codes formed by the first 5 and second b computational blocks, respectively, the frequencies of the lines and fields are fed to the address inputs of the memory block 7, where they serve as sampling codes of the address of the memory cell into which the information is currently recorded. When the signals for termination of the illumination of the first local field are received, the code at the outputs of the first 20 and second 21 counters will change. The output code of the decoder 22 will also change. In consequence of this, switch 4 will skip the parameters necessary for displaying the second local field on the television raster. The information in block 1 of the input parameter registers is set {{set in the same order as it is displayed on the television raster) . However, when the signals for termination of the illumination of the first local floor are received, the switch 4 will not skip the information recorded in the second local field, since the outputs of the first 16 and second 17 triggers will be set to zero and, therefore, at the outputs of the first 18 and second 19 And elements there will also be zero potential. Only when the start signals of the second local field arrive, the first 16 and second 17 triggers are set to state 1, allowing the information to pass through the switch 4 and write it to memory block 7 during the exposure time of the second local field. Thus, a page of information is recorded and the television raster is divided into local fields. In read mode, control signals from the output bus 25 of control unit 9 are sent to switch 4, allowing passage of input parameters registers from block 1, which determine the position n the sizes of local fields, and the first 5 and second 6 computational blocks of parameters that determine the position recorded in the field. khalnyh s x information. In this case, the first computational unit 5 operates in accordance with the expression NX {P-PO) -cosd - f- (n-no) -siny + P -, (2) where NX is the code on the output of the first computational unit 5; . dL is the angle of rotation of the coordinate system of the information displayed in the local field relative to the coordinate system of the television raster; Pf. - distance code on the horizon between the origin of the coordinate system of the information displayed in the local field and the origin of the coordinate system of the television raster. The second computational unit operates in accordance with the expression NV (- (P-PO) sinot (n-no) - cosot + nf., (3 where Ny is the code at the output of the second computational unit 6; Pr is the vertical distance code between the origin of the coordinate system of the information displayed in the local field and the origin of the coordinate system of the television raster. The signals from the outputs of the first 5 and second 6 computing blocks are transmitted by a parallel code to the memory block 7, where they serve as sampling codes of the cell address read moment of time. In this case, the signal from the first computational Ok 5, corresponding to expression (2) determines the column address of the storage matrix of memory block 7, and signals from the second computational block 6, corresponding to expression (3), the row address. When the read function of information from memory block 7 changes by expressions ( 2) and (3) the rotational effect of the image recorded in the local field is obtained on a television raster, and the rotation radius is equal to the sum of the p + 1t vectors Memory block -7 can be implemented on integrated circuits whose speed satisfies the reading condition of the information in the tempo of the television sweep. At the end of the illumination of the local field, the control unit 9 supplies the switch 4 with the signal controllers allowing the first 5 and second 6 computational blocks of parameters about the position of the recorded information to pass in the next local field, and the size parameters of the local field driver 8 arrive. this local gender. As a result, during the time of illumination of the second local FIELD on the television raster, information recorded in the second local field will be displayed in accordance with the reading laws (2) and (3), after the illumination of the second local field ends, the process is repeated as many times as local fields in the page displayed on the TV raster information. From the output of memory block 7, the video signal of a page of displayed information on the output bus 14 may be supplied for direct display to the modulator of a cathode ray tube, or to another television image device in which the page of displayed information is an integral part. The input parameter register unit 1, the line sampler 2, the coordinate code conversion unit 3, the switch 4, the first 5 and second 6 computational blocks, the local field video signal generator 8 and the control block 9 can be implemented on K155 integrated circuits. Thus, the use of a local-field video signal generator 8, control unit 9 and corresponding connections expands the functionality of the proposed device for displaying information, namely, it allows forming more than one vector during the field sweep period and reduces hardware costs, since imaging an information page you need as many known devices to display information as there are local fields in the information page. Claim 1. A device for displaying information on a cathode ray tube (CRT) screen, containing a block of input parameters registers, connected to an input parameters signal bus, serially connected string sampler, connected to a synchronization signal bus in rows, and a first computing unit, Consistently connected coordinate code conversion unit, connected to the synchronization signal buses in rows and fields, and a second computing unit, a switchboard, and a memory unit characterized by By the fact that, in order to expand the field of application of the device by increasing the volume of the displayed information during the field sweep period, sequentially connected video field generator of the local field, whose inputs are connected, are introduced into it; accordingly, to the outputs the switch, the line sampler and the coordinate code conversion unit, the second input is to the input of the memory unit, and the control unit, the second third and fourth inputs of which are connected, respectively, to the buses of the synchronization signals in rows, fields and the control signal, and the first and the second outputs, respectively, to the first input of the switch and the second input of the memory unit, the second input of the switch is connected to the output of the block of registers of input parameters, and the outputs to the third input of the memory unit and the second inputs of the first and second calculator GOVERNMENTAL blocks third inputs being connected respectively to the outputs of the coordinate conversion block codes and horizontal dis; retizatora, fourth and fifth come in the memory unit are connected respectively to the outputs of the first and second computing units. 2. The device according to claim 1, characterized in that the control unit Lenin contains a single pulse shaper whose inputs are the first and second inputs of the block, and the output the first output of the block, triggers whose inputs are connected to the third input of the block associated with the first inputs of the counters, and the second inputs of the counters are connected, respectively, to the second and fourth inputs of the block, the outputs of the triggers are connected to the first inputs of the elements AND, the second inputs are connected to the first output of the block, the outputs of the counters are connected to the inputs of the decoder a, the output of which and the outputs of the elements And are connected to the second output of the block. Sources of information taken into consideration in the examination 1 1. USSR author's certificate No. 739591, cl. G 06 K 15/20, 1977. 2. USSR author's certificate number 723624, cl. G 06 K 15/20, 1978 (prototype). Fig1 FIG. 2