SU640339A1 - Device for displaying information on crt screen - Google Patents

Description

The viadnn is connected to the output of the zero organs block and the third input of the AND-OR element, the X-axis width former, the orientation block, the second input of which is connected to the output of the edge width former along the Y axis and the interrogator of the elements of symbols but small pox X whose output is connected to the second input of the character generator, the unit for polling the elements of characters along the Y axis, the input of which is connected to the output of the orientation block, and the output to the third input of the generator, the output of the AND-OR element is connected to another input of the video amplifier.

The drawing shows a block diagram of the proposed device.

A device for displaying information on a cathode-ray screen, a tube contains a synchronizer 1, a beam deflection control unit 2, a video amplifier 3, a video control unit (for example, a CRT) 4, a memory block 5, a deflection voltage former 6, a shaping unit vectors 7, block of zero-bodies 8, block of image rotation 9, block of phase-frequency deviation 10, shaper width of the contour along the axis X 11, shaper of the contour along the axis Y 12, orientation block 13, block of interrogation of character elements of the axis X 14, block of polling elements of a symbol along the Y axis 15, generat pa symbols 16, an AND-OR 17, input bus 18.

The synchronizer 1 generates line and frame sync pulses, the address codes of the developable beam image on the screen of the cathode ray tube.

The beam deflection control unit 2, synchronized by synchronizer 1, carries out the beam deflection of the cathode ray tube of the block 4, but along the lines and via the bus 18, the memory block 5 receives information having the following structure: the chromaticity code (hue and saturation); feature codes of the starting and ending addresses of the image; initial and final invention codes, image shift code along a line; code of the feature of graphic or permanent information; code of the type of the reproduced line (direct, circle, ellipse, etc.); code of the initial slope of the image line with a sign; for suggestive information — suggestive image type code; for graphic and suggestive information - image rotation angle code, for alphanumeric information - alphanumeric information type code, symbol italic code, contour width codes horizontally and vertically, size code, font size change code of the symbol but horizontal, initial code character orientation.

The information in memory block 5 is written word by word, therefore there is no correspondence between the address LIfor, ETSI in Block B and the address of the image being played on the screen of the E-beam tube 4.

Unit 5 at the moments of the assembly of the codes of the initial addresses of the image with the codes of the current addresses from the output of the synchronizer 1 excites the block of the formed vectors 7, the output of which produces nanometers of a given form, which is

input block of null-organs 8.

At the second input of the block of bullet-bodies 8, from the output of the block P, a voltage enters, which is normalized to the current in the horizontal deflection base entemater entering the block controlled by the beam deflection 2.

At the moments of comparison of the indicated voltages, at the inputs of the block of null organs 8, impulses are formed at its output, postoyyatechno at the input of the element AND-OR 17 and

input phase deviation unit 10.

In case of graphical information, the AND-OR 17 element generates these impulses to the video amplifier 3, which modulates the required points of the image lines on the screen of the block 4.

In video amplifier 3, block 5 includes the required color colors, which determines the chromaticity of the reproduced image. Similar to the excitation of block 7, it is switched on at the appropriate times, determined by block 5 and synchronizer 1.

Information about the magnitude of the angle of rotation or shear of the corresponding image element comes from the output of block 5 to the input of block 9.

The block 9 in the process of turning the corresponding element of the full image will set the input of the block of null organs 8 during

 lines of notice, the size and direction of which changes are proportional to the angle of rotation code.

Shifting an image along a line this iothenial has a duration of one

frame.

In the process of reproducing alphanumeric information, the passage of the signal from the output of the block of null organs 8 through the AND-OR element 17 is blocked and the passage of information from the output of the symbol generator 16 is permitted.

Information from the output of the block and organisov In addition to the information from block 5 and synchronizer 1, it controls the operation of block 10.

Block 10 forms groups and pulses, the parameters of which must meet the following conditions: the nominal frequency in Kraz is higher than the frequency of horizontal synchronizing pulses and is determined by the number of characters located along the line; the frequency deviation is determined by changes in the width of symbols, the initial phase of the group and pulses is determined by the moment of termination

moments b.chank-snngalov Hjrii moments

the arrival of control signals from the null-organ block 8; the final phase of a group of pulses is determined by the start of the lower-case blank signals, the control signal tripping times from the symbol generator 16, the moment of the rotation angle angle change from block 5, which is interpreted as alphanumeric information as an italic code.

The pulses from the output of the block of null organs 8 are interpreted during the reproduction of italic symbols as signals of the initial phase of the grchppa pulses forming the strings of symbols. The shift from line to line of pulses defining the initial phase determines the amount of italics that can vary over a wide range and make both a sharp and obtuse angle with the line.

For each character or for a group of characters, a block of null-organs 8 can be received impulses that specify different initial phases, i.e., the characters in the string can have different italics.

The shaper of the contour width along the X 11 axis and the shaper of the width of the contour along the Y axis 12 are divided respectively into a pulsed sequence from block 10 and lowercase sync pulses from synchronizer 1 i / and l times, where / and n are contour thickening coefficients in Y and X, respectively, codes from block 5.

Simultaneously with the change in the outline of the contour, the linear dimensions of the symbols change, thus preventing the sticking of individual elements of the symbol and the deterioration of their readability.

The frequency deviation of the groups of pulses at the output of block 10 allows you to smoothly change the width of the contour along the Y axis. The code for the magnitude of the deviation is also set from block 5.

These two pulse sequences are fed to the input of the orientation block 13, which specifies, together with the block of the sequence of elements X 14 and the block of interrogation of the character elements along the Y axis 15, depending on the initial orientation code of the symbol at the input of the orientation block 13, a certain order of reading information by rows and columns from character generator 16 having a matrix organization.

From the character generator 16, information about the length of individual character elements is read, so that the character does not consist of individual points, but of characters, which improves the quality of characters.

From the output of the character generator 16 through the element AND-OR 17, which in the mode of outputting alphanumeric information passes on the basis of outputting alphanumeric information, information from the output of block 5 to the video amplifier 3, the code pulse sequence illuminates the interlaced scanners

raster lines of the cathode-ray tube of block 4, reproduce symbols whose configuration .. is stored in the symbol generator 16 and the code of which is fed to

input of the symbol generator 16 from block 5.

Expansion of the contour of reproduced symbols with one-dimensional increase in their linear dimensions is due to the fact that they and the same elements of symbols

in the process of thickening the contour are read from the symbol generator 16 / and n times, i.e., the amount of information stored in the symbol generator 16 and, accordingly, the amount of frame equipment at the specified symbol transformation will not increase.

Claims (2)

1. The patent of Germany No. 2014954, cl. G 06K 15/20, 03.03.73. 2. For the number 2375789, cl. G 06К 15/20, 24.06.76, according to which a positive decision was received with the issuance of the author’s copies of a.