SU705485A1 - Device for forming an image on the screen of a cathode ray tube - Google Patents

Description

The invention relates to the field of visualization technology and can be used in devices for displaying information on the screen of the electron beam is rude.

A device for displaying information is known, comprising a block of shaped rectangular elements connected to code lines Increments along the X and Y coordinate, a brightness block connected to the brightness code bus and an electron-beam tube (CRT), and beam deflection blocks along the X and U coordinates connected to the CRT and the corresponding kodovtm tires Coordinates X and Y 1.

A disadvantage of the known device is the impossibility of forming a grayscale image of n (ix) arbitrarily oriented triangular elements.

The closest in technical essence to this is a device containing a block of re-raying the ray along the X coordinate, connected to a reversible counter along the X coordinate connected to the scanner along the X coordinate connected to

an electron beam tube, an impulse generator connected to a beam moving unit along the X coordinate and an increment block along the X coordinate, a control unit connected to the increment block along the X coordinate, a pulse generator and a luminance block connected to the electron beam tube, and a reversible counter along the coordinate U connected to the scanner along the U coordinate connected to the CRT {2.

The disadvantage of this device is the narrow scope, due to the lack of the possibility of forming a halftone image of arbitrarily oriented triangular elements.

The object of the invention is to expand the field of application of the device by forming a halftone image from arbitrarily oriented triangular elements.

This is achieved in that a device containing a unit for moving the beam along the X coordinate, connected to a reversible counting unit along the X coordinate, connected to the scanner along the X coordinate, connected to the cathode-ray pulse generator; : nkyy To the unit for moving the beam along the X coordinate and to the increment unit along the X coordinate, the control unit connected to the next unit along the X coordinate, the pulse generator and the luminance unit connected to the cathode ray tube, and a reversible counter along the Y coordinate connected to the scanner on the Y coordinate connected to the cathode ray tube Kb, a matching element is entered, a beam moving unit on the Y coordinate, connected to the Orientation code bus, a register of inclination codes on the X and Y coordinates, counters on the X and Y coordinates and g in the comparison unit, connected to the control unit, with the inclination codes registers in the X and Y coordinates and counters in coordinates X and Y, connected to the control unit connected to one of the inputs of the coincidence element, the other input to which is connected to the beam moving unit in the X coordinate, and the output to the increment block on the X coordinate connected to the counter on the Y coordinate and the ray moving block on the Y coordinate connected to the reversible counter on the Y coordinate, Xyik on the X coordinate connected to the impuser generator .

Diagram of the device shown in the drawing.

The device contains reversible counters I, 2 along the X and Y coordinates, code buses 3, 4 X and Y coordinates, blocks 5, 6 sweeps along the X and Y coordinates, blocks 7, 8 and the control block 9, brightness block 10, code bus Luminance, registers 12, 13 codes on the X and Y coordinates, code buses 14, 15 slopes on the X and Y coordinates, counters 16, 17 on the X and Y coordinates, block 18 of moving the beam on the X coordinate, pulse generator 19, element 20 matches, block 21 of increments along the X coordinate, code bus 22 increments, block 23 of moving the beam along the Y coordinate, code bus 24 orientation tation.

The device works as follows.

A complex halftone image is formed from isosceles triangles with a base size DX parallel to the X axis, the starting point of the beam sweep with X, Y coordinates, angles at the base equal to at-ctg (h and b are the distances between the points on the X and Y axis respectively) - The formed triangular element can have iWe orientations (base at the top or B1) given by orientation code d, received via code bus 24 (a O or a 1). At each round of call to a call device

X, At the triangular element, they are bought for the corresponding reversible counters 1, 2. The beam on the screen of the ELT through the blocks 5, b of the sweep is deflected to the starting point with the coordinates X, U. The luminance code 3 on the code bus 11 enters through the luminance block 10 gated by the block signal 9, to the CRT modulator, illuminating the beam at a specified point. At the same time, the HH code is sent to

increment unit 21, code a — to unit 23 for moving the beam along the Y coordinate, codes h and b to the respective registers 12, 13 of the KoTs of tilt along the X and Y coordinates. The signals from the control unit 9 are reset to the counters 16. 17, the beam moving unit 18 along the X coordinate, the operation of the counter 16 is prohibited, and a pulse generator 19 is triggered, producing a sequence of pulses arriving in

block 21 increments and block 18 movement

along the X coordinate, pulses from the output of the latter provide a consistent increase in the code of the reversible counter 1 along the X coordinate, shifting the beam on the CRT screen. This occurs as long as the number of pulses that are sent to block 21 does not coincide with the DH code recorded on code bus 22. At the time of coincidence by block 21, a pulse is generated, which through the beam moving unit 23 along the Y coordinate enters the reversible counter 2 and depending on the orientation code a (a O or a 1) adds or subtracts a unit in the reversible counter 2 according to the coordinate W. In this case, using block 6

sweep, the beam moves along the Y coordinate up (the base of the triangle on the bottom} or down (the base of the triangle on the top). The signal from the increment block 21 adds one to the counter 17 along the coordinate

Y and enters the control block 9, the signal from the KoTCiporo Output sets the beam moving unit 18 along the X coordinate to the opposite state, preparing the subtraction of the unit in the reversible counter 1, and

C: Tests on the first input of the element 20 a match. If the contents of counter 17 and register 13 match, the signal from the output of the comparison unit through control block 9 turns off the brightness unit 10 and gates counter 16. The pulses from the generator output 19 increase the code in counter 16, and through block 18 to move the beam along the X coordinate consistently reduce the contents of the reversible counter 1, estimated beam

Claims (2)

CRT in the opposite direction (left) without highlighting points. The pulses from the output of block 18 are supplied through the element 20 of the coincidence in block 21 of increments on the x-coordinate X, which is sequentially retrieved from the HH code by two units. When the contents of the register 12 and counter 16 are equal, comparison unit 7 generates a signal that, through control unit 9, enters the brightness unit 10, disables the display of the following points on the screen, sets the counter 16 to the X coordinate to zero and disables the coincidence element 20. Signals from the output of block 18 through the reversible counter 1 and block 5 of the sweep continue to move the beam on the CRT screen to the left, highlighting the second row of size (HH - 2b). At the end of the sweep of the next line, the increment unit 21 generates a signal that adds a unit to the counter 17 along the Y coordinate and enters the control unit 9. If, in contrast to the considered case, the contents of the register 13 and the counter 17 do not match, then block 9 does not turn off the brightness unit 10 and does not gate input element 20 coincidentally and counter 16 to coordinate X, but only sets the opposite state 18 of moving the beam along the X coordinate. At the same time, the next line on the CRT screen forms coinciding with the previous one, but is located relative to it higher or lower by one, depending on the value of the orientation code. After forming the last line of the triangular element (its top), the contents of the DH of the 21 increments block. becomes zero. The signal from the output of the block 21 enters the control block 9, which produces signals that turn off the brightness block 10 and terminate the cycle of the formation of the next triangular element. Thus, the device allows to form on a CRT screen a triangular image element on a CRT screen, the set of which forms a complex halftone image with a border composed of arbitrarily oriented straight line segments. The invention of a device for forming an image on a screen of a cathode ray tube, comprising a unit for moving the beam along the X coordinate, connected to a reversible counter along the coordinate X, connected to the scanner along the coordinate X, connected to a cathode ray tube, a pulse generator connected to the unit for moving the beam along the X coordinate and the increment block along the X coordinate, the control unit connected to the increment block along the X coordinate, the pulse generator and the luminance block connected to the electron-beam T wheeling, and a reversible counter on the Y coordinate, connected to the scanner on the Y coordinate, connected to an electron beam tube, characterized in that, in order to expand the device application area by forming a halftone image from arbitrarily oriented triangular elements, a coincidence element is inserted into it, a unit for moving the beam along the coordinate Y, connected to a code-driven orientation, registers of tilt codes along the coordinates X and Y, counters along the coordinates X and Y, and two comparison units connected to the unit controls corresponding registers of inclination codes on the X and Y coordinates and counters on the X and Y coordinates connected to the control unit connected to one input of the coincidence element, the input bar of which is connected to the beam moving unit lio coordinate X, and the output to the increment unit the X coordinate connected to the counter along the Y coordinate and the beam moving unit along the Y coordinate connected to the reversing counter along the Y coordinate, the counter along the X coordinate connected to the pulse generator. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 585510, cl. G 06 K 15/20, 1976. 2. Author's certificate of the USSR according to the application N 2344083, cl. G 06 K 15/20, 1976 (about the totype).