SU849290A1 - Device for displaying information on crt screen - Google Patents

Description

(54) DEVICE FOR DISPLAYING INFORMATION ON SCREEN OF ELECTRON BREAD TUBE

one

The invention relates to automation and computer technology and can be used to display symbolic information on the screen of a cathode ray tube.

A device for displaying symbols on a television receiver screen is known, comprising a symbol decoder, a segment encoder, row and column counters, a matrix, a generator, a string character B and a one-shot 1.

A disadvantage of the known device is its complexity.

The closest in technical essence to the present invention is a device comprising a selection unit, shapers horizontal, vertical and inclined segments and shaper of the positional code of the video signal 2.

A disadvantage of this device is the impossibility of unambiguously restoring information in the event of an error-failure in the control channels.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device containing the selection unit.

the inputs of which are connected to the outputs of the character code decoder, the shaper of the horizontal segments, the first input of which is connected to the first output of the selection unit, and the output to the first input of the shaper of the positional code of the video signal, the first shaper of vertical segments, the first input of which is connected to the second input of the selection unit, and output - to the second input of the positioner of the position code of the video signal, the outputs of which,

10 through the elements OR are connected to the first inputs of the elements AND, the second inputs of which are connected to the illumination pulse shaper, the second shaper of vertical segments is additionally entered, the second inputs of the shaper of the horizontal segments are connected to all outputs of the shaper of television lines, the second inputs of the first and second shaper of vertical segments are connected to the corresponding outputs of the TV line builder, and the outputs of the first and second vertical PC segments. corresponding to the second and third inputs of the driver of the positional code of the video signal, as well as the fact that

the vertical segment generator contains an OR element and five AND elements, the inputs of the OR element are the second inputs of the former, the outputs of the OR element are connected to one of the inputs of the AND elements, the other inputs of which are the first inputs of the former.

The drawing shows a functional diagram of the proposed device.

The device contains a selection unit 1, which includes elements 2-14 OR, a shaper 15 horizontal segments, consisting of elements 16-18 and the first shaper 19 vertical segments, consisting of element 20 OR and elements 21-25 AND, the second shaper. 26 vertical segments, consisting of element 27 OR and elements 28-32 AND, shaper 33 of the positional video signal code, output elements 34 OR, output elements 35.J, -BB.I. The inputs of the selection unit 1 are connected to the outputs of the decoder of the 36 character code.

The inputs of the elements 16-18 and connected to 1 p / 2 and n outputs n - the number of lines of the television raster) imager 37 television lines. The OR element 20 and the AND elements of the first vertical segment shaper are used to form the upper segments, and the OR element 27 and the 28-32 AND elements are used to form the lower segments.

The inputs of the element (20) OR are connected to the first half (from 1 to 2) of the outputs of the TV line shaper, and the inputs of the element 27 OR to the second (from 2/2 on the R) outputs of the imager 37 TV lines.

The second inputs of the output elements 35..t - 35, f, And connected to the output of the imaging unit 38 illumination pulses ..

J / The device is operational with a minimum number of 5 output shaper tires 39 television lines and output shaper tires 38 pulses of illumination.

With an even number of n outputs of the TV line maker, the middle output bus connected to the inputs of elements 17, 20 and 27 is the n / 2 output of the imaging device, and for an odd number, the output of the imaging device.

The device works as follows.

Signals from the outputs of the decoder 36 characters, the number of outputs corresponding to the number of types of characters that should be reflected on the CRT screen, are fed to the input of the selection unit 1, designed to control the inclusion of the corresponding segment of the formers 15, 19, 26.

Signals defining the number of a number of the element matrix of the sign come from the outputs of the former of 37 television lines to the inputs of logic elements of the formers 15, 19, 26.

At the output of the positioning code generator 33, the position code of the video signals in a given portion of the television line is generated, corresponding to a certain row of the matrix. The outputs of the former 33 are grouped together using the output elements 34 OR. Signals from those outputs of the imager 33 of the positional code of the video signal that control the illumination of the corresponding element in the matrix of the sign horizontally are fed to the input of each of them. Each of the output elements OR controls the inclusion of a corresponding output element 35-i-35. And the number of which is equal to the horizontal size of the matrix. At the second inputs of the elements 35h-35 f, And pulse signals are received from one of the outputs of the imaging unit 38 light pulses. Each subsequent pulse signal is shifted relative to the previous one by time t / n, where t is the time of painting one row of the matrix, and n is the horizontal size of the matrix. At the output elements 35- | -35,, And the video signal is input to the CRT.

Claims (2)

1. A device for displaying information on the screen of a cathode-ray tube containing a selection unit, the inputs of which are connected to the outputs of the character code decoder, the shaper of horizontal 1X segments, the first input of which is connected to the first output of the selection unit, and the output to the first input of the form-distributor position code of the video signal, the first shaper of vertical segments, the first input of which is connected to the second output of the selection unit, and the output to the second input of the shaper of the position code of the video signal, outputs to costly through OR elements connected to the first inputs of the AND elements, the second inputs of which are connected to the backlight pulse former, characterized in that, in order to increase the reliability of the device, the second vertical segment driver is inserted into it, and the second inputs of the horizontal segment former are connected to all outputs the TV line driver, the second inputs of the first and second vertical segment driver are connected to the corresponding outputs, the TV line driver, and the outputs of the first first and second shaper vertical segments are connected respectively to the second and third video input of the positional code. 2. The device according to claim 1, characterized in that the shaper of the vertical segments contains an OR element and a And elements, and the inputs of the OR element are the second inputs of the shaper, its outputs are connected to one of the inputs And elements, the other inputs of which are the first inputs of the former. Sources of information taken into account in the examination 1. USSR author's certificate No. 584321, cl. G.06 K 15/20, 1974. 2. USSR author's certificate for application No. 2485288 / 18-24, cl. G 06 F 3/14, 1977 (prototype).