SU670946A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to the field of automation and computer technology. And can be used in the construction of display devices for graphic information.

A known device for displaying information, comprising a disk storage device connected to a counter X connected to comparators X, clock generators, a counter Y connected to a clock generator connected to video amplifiers connected to television monitors. In it, a disk storage device is connected to video amplifiers, a counter Y is connected to comparators Y connected to control logic connected to an output register connected to a disk storage device X comparators are connected to control logic, the registers Xi, Xz and UH are connected correspondingly with X and Y comparators, the buffer storage device is connected to registers Xi, X, UB UZ, instruction decimator, address logic, output register, data register in ASCn code connected to permanent memory With a character device connected to the output register, the instruction instructions are connected to registers i.

2, 2 and 2, the data register is in code A5SP, the output register, the address logic is connected to the disk storage device, the central processor is connected to the buffer storage device.

Of the known devices for displaying information, the closest to the invention according to the technical entity is a device comprising serially connected clock generator, a counter along the X coordinate connected to a memory unit, a comparator and a clock generator, a counter along the Y coordinate associated with the comparator and a memory unit, a sync pulse generator and a beam sweep unit at coordinates X and Y, a memory unit connected via registers at coordinates X and Y to the comparator, and a video amplifier connected to a CRT.

The disadvantage of such devices is that in them the volume of the image memory is equal to the product of the number of decomposition elements horizontally by the number of decomposition elements along the vertical; downgraded

image quality due to the nonlinearity of the beam movement across the screen of the cathode ray tube of a television monitor with a linear sequence of modulation pulses from the video amplifier on the modulator; uses two memory

devices — a memory for data and instructions and a memory for image data; Entering, erasing, marking an image on the screen using a functional keyboard and / or a light pen is difficult, since each point of the image is processed; p-elz compacted and difficult to sort because of the volume of information in the storage device image data; multiple methods of forming continuous lines are not used (functional generators :); intersecting images are distorted if one of them needs to be erased or shifted (common points fall out).

The aim of the invention is to improve the quality of the display of information.

The goal is achieved by introducing a permanent imager, a trigger, a decoder, a voltage driver and serially connected digital-to-analog converter, a functional generator unit, a zero-body, an OR element, and a memory block connected to a permanent imager, a trigger. associated with an OR element, a digital-to-analog converter, a functional generator block, and a decoder connected to the functional generator block, a constant driver images connected to a clock, a memory unit, a trigger, a function generator, a digital-to-analog output device and a decoder, the voltage driver is connected to a zero-body and deflection system on the X coordinate of the CRT, and the comparator is connected to the decoder and unit memory, and elemeng OR connected with vnodeoampilitel.

The drawing shows a block diagram of a device for displaying information.

The device for displaying information contains a clock pulse generator 1, a counter on the coordinate X 2, a counter on the coordinate Y 3, a clock generator 4, a beam scanner on the coordinate X 5, a beam scanner on the coordinate Y 6, a video amplifier 7, a deflection system on the coordinate X 8, deflection system at coordinate Y 9, cathode ray tube (CRT) 10, memory block 11, register at coordinate X 12, register at coordinate Y 13, comparator 14, voltage driver 15, digital-to-analog converter 16, trigger 17, functional gene block tors 18, the zero-body 19, an OR gate 20, the decoder 21, driver 22 permanent image.

The device works as follows.

Clock 1 generates clock signals, which are read by a counter about the coordinate X 2. Signals

overflows from the counter along the X 2 coordinate are fed to the counter input along the Y 3 coordinate; when the overflow signal from the counter along the coordinate Y 3 appears, it indicates the completion of the formation of one frame of the image. Collectively, the counters along the coordinates / C 2 and U 3 indicate the position of the electron beam on the screen of the cathode ray tube 10, which expands the image in horizontal lines (the counter along the X coordinate 2 indicates the position of the beam within the row, and the counter along the coordinate Y 3 is currently being deployed).

The overflow signals of the counters on the coordinates X 2 and Y 3 are used by the generator of clock pulses 4 to form the horizontal and frame clock pulses that synchronize the blocks of the ray bar from the coordinates Z 5 and U 6, which through the deflecting systems on the coordinates X 8 n Y 9 control - THE LINE is moved by the electro-ray beam on the screen of the electr0: nano-ray tube 10.

The processor sets the information in the memory unit 11, which has the following structure: the code of the code X or Y of the starting address of the image line, the codes X E Y of the starting address of the image line, the code of entering the graphic or constant information, for the graphic information the code of the function generator the code of the type of the line being formed (direct, circle, ellipse, etc., in accordance with the used set of line types), the code of the initial tilt of the image line — with a sign X and At the end address of the image line, for permanent information, the permanent image type code (characters, numbers, conventional images).

For all lines beginning and ending within one line, one and the same U code is used. The circumstance that the end of one line of the image is the beginning of another is also used.

The information in memory unit 11 is written word by word. There is no correspondence between the address of the information in the memory unit 11 and the address of the image being formed on the screen of the electron-beam tube 10.

When displaying graphic information (the code of a graphic or constant information flag, in this case, the constant image generator 22 blocks) the codes X and Y of the starting address of the image write to the registers along the coordinates X 2 to Y 13. The code of the code X or Y of the starting or ending address line image is used when recording information. matsii-corresponding register on

five

coordinates X 12 or У 13. At the moment of comparison of register codes with counter status codes by coordinates X 2 Е У 3 at the output of the comparator 14, the signal by which the decoder 21 according to the address code from memory 11 of one of the The set of functional generators of the functional generator block 18 will turn on this functional generator. The selected functional generator of the functional generator unit 18, according to a signal from the decoder 21, is supplied with a digital-to-analog converter 16, a voltage proportional to the code with the sign of the initial tilt of the image line from memory block 11, and the line type code from memory I.

The signal from comparator 14 reads the next word from memory 11. The first word from the memory block 11 is read at the same time the overflow signals appear from the outputs of the counters on the coordinates J 2 and Y 3.

An excited functional generator of the functional generator unit 18 forms a voltage of a given shape (direct, circumference, ellipse, etc.) that is applied to the input of the null organ 19. The second inputs of the null organ 19 from the voltage driver 15 the current is proportional to the current in deviation, it is on the coordinate system X 8.

One, several or all functional generators of the functional generators block 18 can function at the same time, although they are excited in turn.

At the moments of comparison of the voltages from the outputs of the functional generators 18 with the voltage from the voltage driver 15, the null organ 19 generates pulses that are combined with the OR element 20 and, through the video amplifier 7, modulate the required points of the lines on the screen of the cathode ray tube ;.

By commands from the memory unit 11, the predetermined excited functional generators can be turned off at the required times (the signal from the decoder 21 turns on the unexcited and turns off the excited functional generator of the functional generator block 18).

The trigger 17 is used to form horizontal lines of the image. Switched on for a certain period of time by signals from memory block 11, during this period of time it forms a notional through the element OR 20 and the video amplifier 7 modulating the line or image lines on the screen of the electron-beam tube 10.

The points of the image lines located within one horizontal strip are formed by simultaneously functioning functional generators;

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within different gs11z; 13-ontal bands you can use the same functional generator.

The constant image generator 22 begins to form a constant image at the starting point with coordinates X -c Y, read from memory block II, from which the code for outputting constant information and the type code are also read.

permanent image. The clock of the permanent imager 22 is dried by a clock pulse generator 1. At the end of the output of the first line of the constant imager the permanent imager. 22 generates a signal by which the next word is read from memory 11. To form permanent lines

images a permanent image generator generates control information for a digital-to-analog converter 16, a trigger 17, a block of functional generators 18, a decoder 21

completely similar information selected from memory 11 when forming the image line.

The number and arrangement of the fixed images in the frame are arbitrary and determined by the information recorded in the memory block 11.

Claims (1)

Invention Formula A device for displaying information on the screen of a cathode ray tube (CRT), containing a series-connected clock generator, a counter along the X coordinate, connected to the memory unit, the comparator and the generator of sync pulses, the counter on the Y coordinate associated with the comparator and the memory block, the sync pulse generator and the beam sweep units on the coordinates A and U, connected through the deflecting systems on the coordinates X and Y c A CRT, a memory unit connected through registers in the X and Y coordinates to the comparator, and a video amplifier connected to the CRT, characterized by the fact that, in order to improve the quality of displaying information, a constant-image imaging unit, a trigger, a decoder, a voltage imager and series-connected a digital-to-analog converter, a functional generator block, a zero-organ, an OR element, the memory block being connected to a permanent imager, a trigger associated with the OR element, a digital-analog converter, a functional generator block, and a decoder connected to the functional generator block; These images are connected to a clock generator, a memory unit, a trigger, a function block of a scalar generator, a digital-to-analog converter and a decoder: a drive, a driver voltage is connected to the zero-body and deflection coordinate system X of CRT, and a comparator coupled to the decoder unit and the memory, and an OR gate connected to videozsilitelem.