SU1014010A1 - Device for displaying data on tv receiver screen - Google Patents

Description

The invention relates to computing and may find application in the construction of display devices. A device for displaying information on the screen of a cathode ray tube is known, which contains a memory block, registers, recalculation schemes and symbol generators. 1 3 However, this device has narrow functionality. The closest in technical essence to the invention is a device for displaying information on a television receiver screen, which contains a buffer memory block, a matrix of symbols and after / but connected a pulse generator, a counter, a synchronization block, a standard television signal shaper and a television receiver 2 However, the known device also has a narrow functionality, which consists in displaying a small volume of the alphabet of symbols on the screen of a television receiver. Change or expand the alphabet of characters displayed on the television screen. Zion receiver in the known device is impossible without replacing its main part - the matrix of symbols, which significantly limits its scope in building information display systems. The purpose of the invention is to expand the field of application of the device by increasing the alphabet of displayed symbols. The goal is achieved by the fact that a device for displaying information on a television screen containing a serially connected pulse generator, a first counter, a synchronization unit, a standard television signal generator connected to a television receiver, are connected in series to a first block of buffer memory and a second block a buffer memory, a serially connected permanent memory unit and an input unit, a quencher unit and an address generation unit; the outputs of the first counter are connected to Responsibly with the address generation, quenching, and permanent storage units, the first multiplexer is connected in series, the first input of which is connected to the output of the first buffer memory block, and the second input to the address generation unit, the second multiplexer, the second input of which is connected to the input unit the third multiplexer and the first element OR, the output of which is connected to the second input of a standard television signal generator, are connected in series by a second counter, a comparator, the second input of which is connected to the blanking unit, the third input to the address generation unit, the second output to the second input of the first OR element, the correction unit and the second OR element, the output of which is connected to the first buffer memory unit, the fourth multiplexer and the third OR element, the output of which is connected to the first input of the fourth multiplexer, the second input of which is connected to the address generation unit, and its output; - to the first block of buffer memory, the second and third entrances of the third multiplexer are connected to the outputs of the first counter and the blanking unit, respectively. The drawing shows a block diagram of the proposed device. A device for displaying information on the screen of a television receiver comprises a first block 1 of buffer memory and a series-connected generator of 2 pulses, the first counting. chick 3 synchronization unit, standard television signal generator 5, television receiver 6, serially connected first multiplexer 7, the first input of which is connected to the output of the first buffer memory block 1, second multiplexer 8, third multiplexer 9, first element OR 10, whose output is connected with the second input of the generator 5 of a standard television signal, serially connected block 11 of the permanent memory, the input of which is connected to the second output of the first counter 3 and block 1. input, the output of which dinene with the second input of the second multiplexer 8, serially connected marker control bus 13, second counter It, comparator 15, block 16, response, second OR element 17, the output of which is connected to the first input of the first buffer memory unit 1, control bus 18 connected to the second input of the correction unit 16, serially connected bus 19, second buffer memory unit 20, the second input of which is connected to the input of the first buffer memory unit, output bus 21, serially connected boot bus 22, third ele the ent OR 23, the second input of which is connected to the bus 1 reading, the fourth multiplexer 2C, the output of which is connected to the second input of the first block 1 of the buffer memory, the block 25 forming the address, the input of which is connected to the third output of the first counter 3, the first output - with the second input of the first multi plexor 7, and the second output with the second input of the fourth multiplexer 2k and the second input of the digital comparator 15, the second output of which is connected to the second input of the first element OR 10, the address bus 2b connected to the third input of the fourth multiplex Lexor 2k, input bus 27, connected to the third input of the first block 7 of the buffer memory, blanking unit 28, the first output of which is connected to the third input of the digital KOiMnapaTopa 15, the second output to the second input of the third multiplex 9, and the input to the fourth output of the first counter 3, a fifth output to which is connected to the third input of the third multiplexer 9, and the second input of the second element OR 17 is connected to the loading bus 22. Pre /: The p1 device works as follows. In order to form an image on the screen of the television receiver 6 displaying the required information, it is necessary to control the electron beam of the kinescope in strict accordance with its position on the grid and reproducible information. The position of the beam on the raster is completely determined by the state of the first counter 3, the counting input of which receives pulses from the generator 2 of pulses. The frequency of the pulses from oscillator 2 is selected based on the required dimensions of the decomposition element. At the time of termination of the lines and frames of the television raster, the synchronization unit 4 generates, respectively, the lower case and frame synchronizing and damping pulses received via the shaper 5 of the standard television signal to the antenna input of the television receiver 6, according to the signal from the output of the first counter 3, this provides a hard 04 . . the synchronization of the frivolity of the image on the screen of the television receiver 6. The information displayed on the screen of the television receiver 6 is indicated in the block 1 of the buffer memory in the form of words consisting of codes of several characters. In order to symbolically output information from block 1 of buffer ampli fi cation to the screen of television receiver 6, address generation block 25 forms the address codej, the upper bits of which are fed through the fourth multiplexer 2k to block 1 of the buffer memory and the lower bits to the control input of the first multiplexer 7. In this case, the formation of the address code is performed according to the state of the first counter 3 in accordance with. the required arrangement of characters on the screen of the television receiver 6. In accordance with the address code, the information word selected for mapping appears at the output of the buffer memory block 1, and the code of one of the characters at the output of the first multiplexer 7. This code goes to the control input of the second multiplex 8, the information inputs of which through the block 12 receive the output signals of the block 11 of the permanent memory. The input of the block 11 of the permanent memory from the output of the first counter 3 receives the code of the decomposition format string, in which the displayed symbols are synthesized. The practically used decomposition format does not exceed 8x8 elements, since it can be represented by 2 different SYMBOLS, which significantly covers the display needs of any symbolic information. In this case, the code of the expansion format string is three bits. The block 11 of the permanent memory is designed to implement all the switching functions of these three arguments. It is known that the total number of switching functions of the arguments is i 2 i 256. Consequently, the volume of the block 11 of the permanent memory for implementing all the functions of the arguments will be 2 X 2 °. The kind of symbol played on the television receiver 6 with a certain character code at the output of the first multiplexer 7 is completely determined by the connection of the outputs.

block 11 of the permanent memory with information inputs of the second multiplexer 8, performed on the keypad of block 12. By making the appropriate connections on the keypad, any subset of the full set of 2 characters can be selected. The number of elements of this subset is determined by the size of the character code,

To change the alphabet of symbols, it is enough to change the connections on the dial pad of block 12. Thus, at the output of the second multiplexer 8, a code combination appears that determines the value of the video signal in the corresponding decompression format line of the displayed symbol. This combination is fed to the information inputs of the third multiplexer 9. The third multiplexer 9 converts this code sequence into a serial video signal in accordance with the code of the current element on the decomposition format string received from the output of the first counter 3- Serial video signal through the first element OR 10 and the standard 5 TV driver The signal arrives at the antenna input of the television receiver 6 and is displayed on its screen.

The blanking unit 28 is designed to generate signals that provide blanking of the corresponding positions and decomposition elements. It is used to pre-position the information array on the screen.

When the microprocessor system is operating, software accesses to the buffer storage unit 1 by issuing a signal to the bus 22 of the device are performed. In this mode, the buffer storage unit 1 is loaded with information words via the input bus 27 of data. For this, the address input of the buffer memory block is connected to the address bus 2b via a fourth multiplexer 2k switched by a load signal via a third element OR 23. On

this bus microprocessor provides the address at which information should be located, which at this moment is located on the input bus 27 of the data. After the information has been loaded, the microprocessor removes the signal from the loading bus 22 and the device switches to the information display mode located in block 1 of the buffer memory, kpoMe, the device provides input (correction) of any character from the displayed alphabet at the request of the operator. To do this, signals are transmitted to the marker control bus 13, changing the state of the second counter. 14, the code from the output of the second counter is compared by the comparator 15 with the address code at the output of the address generation unit 25. At the instant these codes coincide, the comparator 15 generates a video signal The first element, OR 10, and the shaper 5 of a standard television signal to the antenna input of the television receiver 6. As a result, the screen position selected for input is indicated by underlining. If there is a permit

the signal on the correction control bus 18, a signal from the output of the comparator 15 that occurs when the addresses at the outputs of the second counter AND and the address generation unit 25 coincide, through the correction block 16 and the second element OR 17 enters the write enable input of the buffer memory unit 1 and records data At that time, on the data input bus 27, at the selected address of block 1, to take into account changes made to the displayed array by correction, the microprocessor issues a signal to bus 19 before performing the next program exchange. reading that captures the busbar addresses of the block 1 of the buffer memory and activating the output block 20 of the buffer memory; As a result, the microprocessor reads information from the output data bus 21 connected through block 20 to the block 1 of the buffer memory,

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Claims (1)

DEVICE FOR DISPLAYING INFORMATION ON THE SCREEN OF A TELEVISION RECEIVER, comprising a pulse generator, a first counter, a synchronization unit, a standard television signal former connected to a television receiver, a first buffer memory unit and a second buffer memory unit connected in series, a read-only memory block and a block input, a blanking unit and an address generation unit, the outputs of the first counter are connected respectively to the address generation units, blanking and permanent memory, characterized in that, in order to expand the scope of the device by increasing the alphabet. of displayed characters, it contains in succession a first multiplexer, the first input of which is connected to the output of the first block of buffer memory, and the second input is connected to the address generation unit, the second multiplexer, the second input of which is connected to the input block, the third multiplexer and the first OR element, the output of which is connected to the second input of the shaper of the standard television signal, a second counter, a comparator, the second input of which is connected to the blanking unit, the third input to the address generation unit, are connected in series the second output is to the second input of the first OR element, the correction unit and the second OR element, the output of which is connected to the first block of the buffer memory, the fourth is a multiplexer and the third OR element, the output of which is connected to the first input of the fourth multiplexer, the second input of which is connected to the forming unit .address, and its output to the first block of the buffer memory, the second and third inputs of the third multiplexer are connected to the <outputs of the first counter and the blanking unit, respectively. 101,401 about