SU562842A1 - Device for displaying information on a television screen - Google Patents

Description

The invention relates to electronic devices for automation, telemechanics and computer technology. It is intended for use in display systems when displaying information on a television screen.

A device for displaying information on a television screen is known, which contains a TV line sync generator, a TV line decoder counter, a sign generator, a video driver 1.

The closest in technical essence is a device for displaying information on a television screen, comprising a serially connected mode storage unit, a decoder, a symbol decomposition element distributor connected to a horizontal and vertical synchronization unit, a signal conditioner, a request gating unit, a line thickness setting unit, associated with the block selector row of the matrix matrix 2. Both of these devices have a complex structure.

The aim of the invention is to simplify the device. This is achieved by the fact that the device contains a zone selection unit, a comparison unit, a line array request firmware programmer, and a line end code setting unit, the comparison unit being connected to the row matrix line selecting unit, the line thickness setting unit and connected to the decoder, a signal conditioner connected through the block of setting the end-of-line code to the decoder, and the shaper of the request array firmware of the string array associated with the query gating unit and the decoder, the zone selection unit is connected to the block th line and frame synchronization and decoder.

The drawing shows a block diagram of ycTpoiicTea.

The device contains a mode code storage / block, a decoder 2, a signal cell decomposition element distributor, a horizontal and a frame synchronization unit 4, a signal conditioner 5, a request gating unit 6, a line thickness set unit 7, a line matrix selection unit 8, a block 9 zone selection, block 10 comparison, format m1 // microprogram request string array, block / 2 set the code end of the line. The inputs and outputs of the blocks of the device are indicated by the numbers 13-24, namely 13 - the output of the imaging unit 5; 14 - output of block 7; 15-17 - outputs of block 10; 18-2 - inputs of block 10; 22 - outputs of block 8; 23 - outputs of the baffle 2, and intended for setting the nature of the displayed information; 24 - distributor outputs 3.

The device works as follows. A standard television raster is used to build the image. In this case, the entire image is constructed from dots, and 1A1, their specific size is horizontal and vertical. These dimensions determine the scale horizontally and vertically, respectively. Information may be displayed of a different nature: graphic information, alphanumeric information, etc. In this case, the image is divided into zones, in each of which the nature of the displayed information is set independently.

The mode code nodes the input of the device, together with the input of the block /, and is memorized in this block. The mode code contains information about the number and size of image zones. The following data is for each zone in the ir wired mode code: the nature of the displayed information, the horizontal scale, the vertical scale, the iriod, and the line array ziros (i.e., the information array needed to form one line of the image). From the block / mode code nostusaet into the decoder 2, which, after deciphering the mode code, generates, from the hints, the control units of the device.

The horizontal scale information from the decoder 2 enters the dispenser 3 of the decomposition elements of the symbol c in block 12 and sets the code of the string. The distributor 3 produces pulses L / i, U-2,. ., t - each of which corresponds to one point in the row of the sign matrix {here t is the number of points in the row of 31-hook matrips). All impulses Ui,. . ., U ,,, have the same iriod of the sequence T and the same duration t, with Tm m t. During the time, the pulses U},. . ., Um are shifted relative to each other in such a way that the impulse is stopped immediately after the impulse U ;. The duration t, which determines the time of displaying one point on the screen and thus sets the horizontal dimension of the point, depends on the frequency of the generator included in the distributor 3. decoder 2. All pulses /, ..., and, n are received exits 24.

Block 12, according to information received from decoder 2, generates a line end code defining the number of points in a line. The code of the string can, for example, be generated in a number,

where i is the number of bits of the counter included in the driver 5; n - the number of ziakomest in line for this mode of operation of the device.

next to the signals; impulse L ,,,. match the last point in the lines ;; siak () howl matrix; one of the pulses corresponding to the intermediate point, for example, the pulse bz; A string synchronizing pulse, which, in turn, enters the distributor 3 from block 4. Io row-wise pulse, which in this case plays the role of a strobe and a mounting device, into the meter, the input is nyi with | code koitsa st | 5oki-Number-n. The pulse Uy is a counting pulse for the indicated counter, and the pulse, and, -, polls the state of the most significant bit of the counter. As soon as the high-order counter of the Vitsun unit, and when the driver 5 of the generator 5 is generated, a signal is generated, it is necessary to block the video signal due to the end of the next line of the image. The number r |) asp. Of the counter is chosen in such a way that - A, where A is the maximum number of oversights per line for all modes of operation of the device. Therefore, the most significant bit of the counter is always set but it must be sent to its pulse in their state, and the "unit will appear in this :; ) asp de ia last, nth familiarity i, line.

The vertical scale information from the decoder 2 enters in block 7 of the task. Block 7 also passes from block 4 the line synchronizing imprints, which also enter the counting input of the counter included in block 7. Coe (the officer doesn’t recalculate this counter, is specified by the PS in step 7 of block 7 of the exporter 2. Cossack factor There is a period with which the output / 4 of the block 7 emits emulsions that are countable for the counter, the input of the unit to the block 8. This period is a multiple of the display time and the screen of the same TV line and sets the number of teles), which one and the same information. This determines the vertical size of the points from which the image is constructed. The counter, the input and block in block 8, produces an invoice according to the mark K, where K is the total number of rows in the sign matrix. The outputs 22 of block 8 are formed in the unitary or positional code of the numbered row of the sign matrix.

Claims (2)

Information about the period and phase of the line array oiros comes from deilifratorg 2 to the inputs 21 of block 10 sravieii. The inputs of all the bits of the counters included in the B / 6-20 of the block 10 receive signals from the outputs of all the bits of the counters included in the blocks 5, 8 and 7, respectively. The information received at inputs 27 consists of three soil codes. Each group corresponds to one of the mentioned counters and sets the state in which this counter should be in the request sending time. In block 10, the current state of the counter is compared with the specified state. When the state of the counter, which is part of block 5, coincides with the specified state, the output 15 of block 10 forms a signal equal to "one." Otherwise, at output 15, the signal is “zero. Similarly, the signals are formed at the outputs 16 and 17, and the output 16 corresponds to the counter included in block 8, and the output / 7 - to the counter included in block 7. From the outputs J5- / 7 of block 10, the signals go to the driver // microprogram request string array. In addition, the U / Shaper comes from the decoder 2 information, which indicates which signals of the W block should be used to form the request microprogram in this device operation mode. So, for example, when displaying graphs, when the line array needs to be changed in each line, there is no need to use signals from output 16. At the output of generator II, a signal equal to "one appears only when the signals are equal to one in all the used in this mode, the outputs of block 10. In other cases, the signal at the output of the driver // is equal to "zero. Thus, at the output of the imager, the microprogram of the string array is deployed in time. “The units of this firmware indicate the need to request a new string array. From the output of the request generator II, microirrograms of the request are sent to the block, which also receives one of the pulses, for example, and from the distributor 3. At the output of block 6, a request signal is generated that is equal to the logical product of the pulse U and the signal received in block 6 of the former //. The request signal enters the source of the displayed information, for example, in a computer or in a buffer memory block. According to this signal, the source of information provides the next portion of the code equivalent of the image corresponding to the next displayed line. The structure and operation of blocks 10, 11 and 6, generating a request signal, does not depend on the number of operating modes of the device. The boundaries of the zones into which the image can be split are formed by block 9, receiving information from block 4. Suppose, for example, an image can be divided into two zones, the upper and the lower, with the upper part of the image taking up either one third or half of the screen, either full screen. In this case, block 9 sends two signals i to the decoder 2 (Jz Signal q is equal to "one during the first third of the frame, and then goes to" zero. Signal 92 "is one in the first half of the frame and" zero in the second half. In the decoder 2 s Considering the mode code, the signal q is generated, with qq or 9 2, if the upper part of the image occupies a third or half of the screen, respectively. In the case when the upper part of the image should occupy the entire screen, the signal q is equal to "one during the entire frame time. If q, then at all the outputs of the decoder 2 io is the control The corresponding information corresponds to the first display zone. If q Q, then on all outputs of the decoder 2 the information corresponds to the second display zone. And, as a rule, graphic information is displayed in one zone, and the other} that is alphanumeric. reduce the amount of code equivalent to the image received from the source of information. The indications about the nature of the information currently being displayed are formed at the outputs 23 of the decoder 2. The signals at the outputs 13, 22, 23, 24 and the code equivalent of the image, polchchaemy from the source of information, uniquely define the video signal, which is then formed in the usual way. An apparatus for displaying information on a television screen, comprising a serially connected storage unit of a mode code, a decoder, a symbol decomposition element distributor connected to a horizontal and vertical spichromisation unit, a signal conditioner, a stubbed request unit, a line thickness setting unit connected to The block selector row of the matrix matrix, characterized in that. what. In order to forgive the device, it contains a zone selection block, a comparison block, a line array request firmware driver, and a line end code setting unit: the block comparison block is connected to a sign matrix row selector block, a line thickness setting block connected to the generator, the signal shaper, connected via a block of setting the end-of-code code CTJJCK to the descrambler, and the driver of the microprogram of the line array request associated with the gadget of the viral and the decoder, the zone selector is connected to the block with -term and frame synchronization; and a decoder. Information sources taken into account in the examination. 1. Television methods and information display devices, ed. M. I. Krgvosheeva. .M., Owls. radio, 1975, p. 10-11.