SU851452A1 - Device for displaying information on crt screen - Google Patents

Description

(54) DISPLAY DEVICE. INFORMATION ON SCREEN ELECTRON BEAM PIPE

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The invention relates to automation and computing and is intended to display spectral graphic information on a screen of a cathode ray tube (CRT).

A device for displaying information comprising a block of pam, a block of synchronization, generators of horizontal and vertical scanning of the beam, CRT 1 is known.

The disadvantages of this device are the difficulty of displaying special graphic (spectral) information.

Closest to the present invention is a device for displaying information on a CRT screen, comprising a synchronization unit, the outputs of which are connected to a signal conditioner, the input of which is connected to a memory unit, and the output is connected to a beamformer, line generator, analog-to-digital converter The output of which is connected to the memory unit, the vertical scanning generator, the electron-beam tube, whose inputs are connected to the horizontal scanning generator, the vertical scanning generator and the beam illumination generator, and The first register, the output of which is connected to the block

memory, two display units, the output of the first display unit through the first decoder is connected to the first adder, the inputs of which are connected to the outputs of the second and third registers, the first inputs of which are connected to the first register, the second inputs to the first and second comparators, respectively, whose inputs are connected with the frame sweep generator, the input of the second display unit is connected to the second adder, the inputs of which are connected to the outputs of the fourth and fifth registers, whose first inputs are connected a memory unit, the second input - to the first and second comparators, respectively, whose outputs are connected to the illumination beam shaper 21.

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The disadvantages of the known device are the complexity of organizing the display of special graphic (spectral) information, significant distortion of the spectral function due to horizontal

20 organizations of development and, besides, the big hardware expenses;

The purpose of the invention is to simplify the device and increase its accuracy.

The goal is achieved in that a device comprising a sequentially connected synchronization unit, a row counter and a frame scanner associated with a CRT, a memory unit connected to the row counter and the first comparator, a row element counter connected to the synchronization unit that is connected to a row generator connected to a CRT connected to the illumination shaper, and a reversible counter connected to the first comparator, a second comparator is introduced, the inputs of which are connected to the memory unit and the counter ementov line and exit - with the input of the illumination.

The drawing schematically shows the proposed device.

The device for displaying information on the screen of a CRT contains a synchronization unit 1, a generator of 2 lines, a block of 3 memory, a 4 line counter, a 5 frame scanner, a 6 line element counter, an information comparator 7, a reversible marker counter 8, a marker comparator 9, a driver 10 illumination and CRT 11.

The input of memory block 3 is the input of the display device. The output of memory block 3 is connected to an information comparator 7, the second input of which is connected to the output of the counter 6 row elements, the input of which is connected to the synchronization unit 1. The output of the synchronization unit is connected to a 2 line generator and a 4 line counter. The output of the 4-row counter is connected to the memory unit 3, the vertical scanner 5, the marker comparator 9, the second input of which is connected to the reversible counter 8 of the marker. The outputs of the generator 2 lines, shaper 5 frame scanner, shaper 10 illumination connected to the CRT 11.

The device works as follows.

In the initial (static) state, the counters 4, 6 and 8 are inserted into “O, the initial information is inscribed in memory block 3, the outputs of the comparators 7 and 9 of the information and the marker are logical“ O, which corresponds to the absence of CRT beam illumination.

When the generator receives 2 lines and a 4-line counter of the synchronizing pulse from synchronization unit 1, the 2-line generator starts to expand the first line (the lines are arranged vertically), and the first information word is called from memory block 3, in accordance with the line counter code. The counter of 6 line elements counts clock pulses coming from the synchronization block. The row highlight lasts from the moment of arrival of the horizontal sync pulse to the moment the counter codes of the 6 row elements and the memory block 3 coincide, and the information comparator 7 supplies the illuminator 10 with a backlight signal. The following clock pulse will change the code of the 4-line counter, according to which from block 3

the memory will recall the next word, and so on. If the code of the reversible counter of the marker 8 and the code of the counter of 4 lines coincide, the backlight generator will give a signal of the additional illumination of the marker.

Claims (2)

1. USSR author's certificate No. 628511, cl. G 06 K 15/20, 1978. 2. USSR author's certificate No. 628510, cl. G 06 K 15/20, 1978 (prototype). 7 - // YU