SU811248A1 - Device for displaying information on crt screen - Google Patents

Description

transducers 12 and 13, a deflecting system 14 of the cathode-ray tube 15, a synchronization unit 16 with outputs 17-23, the buses 21, 22 and 23 being the first, second and third inputs of the device.

The device works as follows. The inputs of the first 21, second 22, third 23 devices receive, respectively, the coordinate codes X and Y and the signal tracking information. Codes of coordinates X, Y are fed to the first inputs of the registers of the first group 1 and 2, and the signal tracking information - to the input of the synchronization unit 16. With this signal, the synchronization unit generates a sequence of signals 24-26. The registers of the second group 3 and 4 originally recorded the code “Zero. Signal 24 records the X, Y coordinate codes from 21 and 22 into registers 1 and 2, respectively. Codes of X, Y coordinates from the outputs of registers 1 and 2 are fed to the inputs of digital-to-analog converters 12 and 13, as well as to the first inputs of the units that calculate the difference difference module 5 and 6 and registers 3 and 4. At the same time, no entry is made in registers 3, 4 since there is no signal on the bus 20. Thus, the first inputs of blocks 5 and 6 of the module of difference calculation after the signal 24 form the coordinate codes X and Y, respectively, and on the second inputs the code of the initial state of the beam formed during the initial installation of the device. Blocks 5 and 6 of the modulus of difference calculation are designed to perform one operation — the formation of the signal | A – B |, where A and B are the signals at the first and second inputs, respectively. Thus, at the outputs of blocks 5, 6, the inverse codes of the difference between the current and the initial values of the X and Y coordinates are formed. From the outputs of the blocks; 5, 6, these codes are entered into the counters 10 and, after the signal 25, after which the synchronization unit begins to generate "signal packets 26. The signal repetition period p packet is determined by the required delay value at the smallest difference between the current and previous values of the coordinate codes. With the arrival of the “packet” signal, each counter increases the content by “1. Signal 24 records the registers 1, 2 of the coordinate codes X and Y from buses 21, 22. Codes from the outputs of registers 1, 2 are fed to the inputs of digital-to-analog converters 12, 13, which form deflecting currents in the deflecting system 14, and also to the inputs of blocks 5, 6, and codes from the outputs of registers 3, 4 are fed to the input of the same blocks. Blocks 5, 6 form, at their outputs, modules of reverse codes of the differences of the input signals A, B, which, according to signal 25, are entered into the counters previously set to the initial state of signals 26. According to the signal 26, counters 10 And simultaneously begin counting. Once

the state of any counter becomes zero, the signal is removed from its direct output and the corresponding element P (9 for counter 10 or 8 for counter 11} stops transmitting signals 26 to the counter input of the counter. The counter stops counting. When both counters become equal to "Oh, the element And the signal 26 generates a signal 27. The signal 27 from the output

element P 7 is fed to the input of the electronic-l-1 pipe 1. In addition, the signal 27 is fed to the second inputs of the registers 3, 4 and the input of the synchronization unit 16. The signal 27 to the registers 3, 4 enter the code from the outputs of the register 1 and 2, whereupon the synchronization unit stops generating signals 24, 25, 26 until the next information impulse arrives.

With the advent of the following pulses

tracking information in registers 1 and 2 are added to the new values of the X, Y coordinate codes and the described process is repeated. In this case, the outputs of blocks 5, G form the code of the difference between the previous and

the current values of the coordinates X, Y.

Thus, counters 10, 11 count the number of signals 26, proportional to the difference between the previous and current coordinate values, and the delay in the formation of the backlight pulse is proportional to the distance between the previous and current points of the point.

Considering that the output of the graphic and most of the species is alphanumeric

information more than 90% of the distance from the previous to the current output points correspond to a single beam non-displacement (the maximum distance corresponds to the ioO beam path and more than one interlaces), setting the delay time of the light relative to the beginning of the beam displacement proportional to the displacement amount allows fixed delay to reduce losses

time when installing the beam at a given coordinate in the average of 8-10 times. The overall gain in time depends on the time required for the pixel (dot) element to be ejected. Average time

displaying information on a frame (2000 alphanumeric characters) is reduced by more than 2 times in the application of the proposed three-way solution.

FORUMUA AND 3 ABOUT AND

A device for displaying information on the screen of a cathode ray tube containing a synchronization unit connected to the first group of registers connected to digital-to-analog converters connected to the deflecting system of the cathode-ray tube whose modulator is at the input of the unit

Synchronization, characterized in that,

In order to improve the speed of the device, it contains the second group of registers, the first element I, the serially connected module calculation units connected to the registers of the second group, and the counters connected to one of the inputs of the first element I whose output is connected to the electron beam modulator tubes, and the second elements And, one of the inputs of which are connections with the second output of the synchronization unit and the other input of the first element And, the other inputs of the second elements And connected to the other outputs of the counters, the other inputs of the block The module's computations are connected to the outputs of registers of the first group connected to one of the inputs of registers of the second group, the other inputs of which are connected to the output of the first element AND, the third output of the down-conversion block is connected to the second inputs of the counters, the third inputs of which are connected to the outputs of the second elements I.

Sources of information taken into account in the examination

1. Author's certificate of the USSR № 414607, cl. G 06 K 15/20, 1974.

2. Author's certificate of the USSR but N N. 2490418 / 18-24, clause G 06 K

15/20, 1977 (prototype).

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Claims (1)

Claim A device for displaying information on the screen of a cathode ray tube containing a synchronization unit connected to a first group of registers connected to digital-to-analog converters connected to a deflecting cathode ray tube system, a modulator of which is connected to an input of a synchronization unit, further, in order to increase the speed of the device, it contains a second group of registers, the first element AND, series-connected blocks of the module's calculation, connected to the registers of the second group s, and counters connected to one of the inputs of the first element And, the output of which is connected to the cathode ray tube modulator, and the second elements And, one of the inputs of which are connected to the second output of the synchronization unit and the other input of the first element And, the other inputs of the second elements And they are connected to other outputs of the counters, the other inputs of the module calculation blocks are connected to the outputs of the registers of the first group connected to one of the inputs of the registers of the second group, the other inputs of which are connected to the output of the first element AND, the third output d dinhronizatsii unit 5 is connected to second inputs of the counters, the third inputs of which are connected to the outputs of the second elements I.