SU634321A1 - Device for displaying information on crt screen - Google Patents

Description

The aim of the invention is to expand the field of application of the device by ensuring the rotation of individual image elements and their shift along the scan line.

The goal is achieved by the fact that sequentially connected code increments register associated with a regeneration and control unit, a code increment accumulator connected to a synchronizer and a regeneration and control unit, a half-plane code selection unit connected to a code increment register, and an increment converter are entered into the device. stresses associated with a block of null organs.

FIG. 1 shows a block diagram of a device for displaying information on a CRT screen; in fig. 2 - first time diagram; in fig. 3 is a second time diagram; in fig. 4 shows the playback image on a CRT screen.

A device for displaying information on the CRT screen of FIG. 1 contains, a synchronizer 1, a beam deflection control unit a. 2, a video amplifier 3, a cathode ray tube 4, a regeneration and control unit 5, a voltage driver 6, an imaging unit 7, a block of null-bodies 8, a code increment register 9, a code increment accumulator 10, block selection code half-plane 11, voltage increment converter. 12, the bus 13 input.

Synchronizer 1 generates horizontal and vertical sync pulses, address codes of the beam sweep image on the screen of the electron-beam tube 4 within the line and frame (line number) of the image.

The deflection control unit of the beam 2, synchronized by the synchronizer 1, carries out the deflection of the beam of the cathode ray tube 4 in rows and frame.

On the bus 13, information is received in the regeneration and control unit with the following structure: codes of the signs of the starting and ending addresses of the image, codes of the starting and ending addresses of the image, code of the characteristics of graphic or constant information; for graphic information, the address code of the function generator in the imaging device 7, the type code of the reproduced line (direct, circle, ellipse, etc.), the code of the initial slope of the image line with a sign; for constant information, the code of the type images (symbols, numbers, etc.), the code of the angle of rotation of the image, the keel of the image along the line.

The information in the regeneration and control unit 5 is recorded word by word, in connection with which there is no correspondence between the address information in the regeneration and control unit 5 and the address

the reproduced image on the screen of the cathode ray tube 4.

The regeneration and control unit 5 at the moments of coincidence of codes of initial addresses of images with codes of current addresses with

The 5 outputs of the synchronizer 1 excites the imaging unit 7, at the output of which the voltages of a predetermined form are produced, which are fed to the input of the block of null-bodies 8.

The second input of the zero-organs block 8 from the voltage driver 6 is supplied with a voltage proportional to the current in the horizontal deflection roller, which enters the beam deflection control unit 2.

5 V. The moments of comparison of the indicated voltages at the inputs of the null-organs block 8, at its output, pulses are formed that modulate the required points of the image lines through the video amplifier 3 on the screen of the electron-beam tube 4.

Similar to the initiation of the imaging unit 7, it is turned off at the corresponding time points determined by the regeneration and control unit 5 and the synchronizer 1.

5 The increment register of code 9 from the output of the regeneration and control unit 5 contains information about the code of the value of the angle of rotation of the image element, the code of the half-plane — upper or lower (1 bit) and the code of the direction of rotation — or

0 counterclockwise (1 bit d).

A code 10 increment accumulator, for example, an accumulating adder, accumulates the sum of the rotation angle value codes, with one accumulation event occurring on a horizontal synchronizing pulse, i.e., once per line.

Clocking of the accumulator of code 10 increments by a horizontal or frame frequency occurs depending on the polarity of the control signal from the output of the regeneration and control unit 5.

Depending on the code of the direction of rotation of the image element on the code 10 increment accumulator, an increase in the accumulated amount code (counterclockwise) or a decrease in the accumulated sum code (clockwise rotation) occurs, i.e., addition or subtraction is performed on the accumulator code definitions 10.

From the output of the code storage unit

Q 10 through the half-plane code selection block 11, depending on the half-plane code on the increment register of code 9, the forward or reverse code of the accumulated sum of the rotation angle is fed to the voltage increment converter 12, which converts

5 this code is proportional to the voltage.

Claims (2)

At the input of the block of null organs 8, this voltage displaces the voltages relative to each other from the output of the imaging unit 7 and from the output of the voltage imaging unit 6. Consider the rotation process in more detail in time diagrams of FIG. 2, FIG. 3 and FIG. 4, on which the following symbols are used; time axis-14; stress axis 15; voltage proportional to the current in the horizontal deflection coil, from the output of the voltage driver - 6-16; the voltage from the output of the imager - 7 - 17; the voltage from the output of the voltage increment converter 12 for various rotation options — 18, 19, 20, 21; voltage lines - x-axis of CRT -26; Y-axis CRT -27. In the absence of voltage from the output of the voltage increment converter 12 on the screen of the electron-beam tube 4 (Fig. 4), the vertical voltage line 17 is reproduced in axes X 26 and Y 27 Step 18 voltage voltage output from the voltage converter 12 output (amplitude a single step of which is proportional to the angle of rotation code, and the duration of each step is equal to the duration of one line) displaces the relative position of voltages 16 and 17 during each line. Since at the moment of intersection of these voltages an impulse is formed image modulation pulse, the time shift of the modulation pulses from line to line is equivalent to reproducing on the screen of the cathode ray tube 4 rotated relative to the initial position of the image of line 22. Other forms of voltage from the output of the voltage increment converter 12 -19, 20, 21 , as described above, the source lines of the image are rotated clockwise and counterclockwise, in the upper and lower flatplanes - lines 23, 24, 25. When the accumulated amount is clocked on the 10-frame code increment accumulator synchronized pulses simultaneously mix all image points, which is equivalent to shifting the entire image along the line (X axis) left or right by a certain distance proportional to the code of the shift value on the code increment register 9, if the timing occurred once, or smoothly mixing along the entire image if clock synchronization by frame sync pulse occurs continuously. The movement will be perceived as smooth (with small values of movement per frame) and appear continuous, since the frequency of changing the individual phases of the image for the television standard is 50 times per second. In the proposed device, the reproduction of new images from / starting from the initial angle of rotation of individual elements or their shift along the scan line is performed by rotating or shifting the original image elements, which is equivalent to expanding the set of original image elements. So, if a standard vertical and horizontal resolution (512x512) is used for a standard TV format, which is less than the 625x800 resolution specified in the literature, then the minimum angle of rotation for a line can be determined from the ratio a Then the number of possible lines within a 360 ° angle is equal to p. Since the shifted lines can be 512, the total number of reproducible rotated and shifted lines reaches a value of 3600x512 185000 only when using one rotation channel and one shift channel. The use of several channels of shift and rotation in the appropriate number of times increases the set of reproduced images. If we consider that it is possible to shift and rotate lines of arbitrary configuration and at the same time many lines, then the set of lines transformed in this way still increases significantly. The rotation of the images in the proposed device is carried out without the involvement of complex algorithms that operate with harmonic signals. Also, complex analog-digital equipment (multipliers, analog memory, sine cosine decoders, etc.) is not used for rotation. Rotation and shift of image elements in a small degree loads digital computational masses — only a rotation angle code or a shift code is needed, which reduces the load on the communication channel, simplifies the real-time conversational mode and playback of rotating and moving image elements and rotation bodies. Apparatus of the Invention A device for displaying information on a screen of a cathode ray tube (CRT), comprising a serially connected regeneration and control unit, an imager connected to a regeneration and control unit, a null organ unit, a video amplifier, a Hibip i CRT connected, and serially connected synchronizer connected to the regeneration unit to the control and to the imaging unit, the control unit of the beam deflection, constricted with the CRT, and the voltage generator, connected to the unit No.1-op. , characterized in that, in order to expand the field of application of the device by ensuring the separation of the eighth image elements and shifting them along the spreading line, serially connected registers are entered into it in connection with the regeneration and control unit, the code increment accumulator connected to the synchronizer and the regeneration and control unit, the half-plane code selection unit connected to the code increment register, and the voltage increment converter associated with the block of organ units. Sources of information taken into account in the examination; 1. Television methods and devices for displaying information. Ed. MI Krivoshcheeva. M., “Soviet Radio, 1975, pp. 90-106. 2. For registration No. 2144633 / 18-24 dated 08.28.76, according to which, a copyright certificate was issued. .one Riga.g 17-A 27