SU951377A2 - Device for displaying data on cathode-ray tube screen - Google Patents

Description

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The invention relates to a character indicator devices and can be used to display information on the screen of a cathode ray tube.

According to the main author. St. fP 8112 7 a device is known that contains a coordinate adder, a control unit associated with an input unit, a light pen pulse shaping unit, a sign illumination amplifier connected to a modulator of a CRT tube by a interface unit and a memory unit connected to an alternator, coordinate register and the interface unit, the electron-beam tube is connected to the amplifier unit connected to the digital-to-analog converter, the adder of coordinates is connected to the coordinate register, the digital-to-analog converter and the character generator torus, which is connected to the control unit and the illumination of the amplifier, and comprises a decoder /

serially connected counter points of counting the sign, the decoder and the register of the coordinates of points 1.

The disadvantage of the present invention is the distortion of a developed sign or symbol during parallel operation of a character generator with a block of coordinate adders and a character generator with an inter-node coordinate sweep, which reduces the quality of the invention.

The purpose of the invention is to improve the accuracy of the image of the formed character or symbol.

The goal is achieved by the fact that an inter-node coordinate sweep unit, an AND element and a frequency divider, whose input is connected to the control unit, and the outputs with an increment estimator and a block of coordinate adders, the inputs of the And element are connected to the control unit and increment registers, and the output are entered into the device. - with an inter-node coordinate sweep unit, the gates of which are connected to a block of coordinate adders and increment registers, and the output is connected to a block of coordinate increments. The drawing shows a block diagram of a device for displaying information. The device contains a cathode ray tube (CRT) 1 with a diverting system connected through a block of 2 coordinate amplifiers with a block of 3 coordinate transducers, a manual input device i connected to a control block 5 which is connected via backlight amplifiers 6 to; a backlight of a CRT 1 and through the light pen unit 7 with the light pen 8, the interface device 9 connected to the inputs-10 devices for displaying information, and connected through the storage device 11 and the register 12 of the microraster position with the inputs of the block 13 x adders, the inputs of which are connected to the AND generator, executed on reg fear of 15 increments, decoder 16 increments and counter 17 increments, with the register inputs of the registers of increments 13 connected to the second outputs of the storage device 11, block 18 inter-node coordinate sweep connected to the input of a block of 3 coordinate transducers, to the outputs of a block of 13 coordinate adders and connected along control circuits directly to the corresponding outputs of the registers of 13 increments and through the element I 19, the other input of which th connected to the input amplifiers 6 illumination mark. In addition, a frequency divider 20 connected in parallel to the inputs of the sign illuminating amplifiers 6 and connected to the input of the increment counter 17 is inserted into the proposed device, the installation inputs of the frequency divider 20 being connected to the corresponding increment register outputs. The device operates as follows. The input information (information array) input to the inputs 10 is copied to the storage device 11 from the external digital computer via the interface 9. At the address formed in control unit 5, a corresponding word is selected from memory 11. At the same time, the code with the initial coordinates of the microraster location is rewritten into the register of the microspace position 12 / and the increment code with the division factors of the frequency divider 20 and with the control signals of the inter-node coordinate sweep unit 18 with the AND 19 element for all p-sections of the unfolded sign or symbol is rewritten into n registers 15 increments. Next, information from the output of register 12 of the microraster position goes to the first inputs of block 13 coordinate sums that determines the initial coordinates of the location of the microformat raster being deployed on the screen of the CRT 1. Under the action of pulses coming from the output of frequency divider 20, the increment counter 17 through the decoder 1b increments provides the sequential connection of the outputs of the increment registers 15, ..15 to the second inputs of the block of coordinate adders 13, which determines the nodal coordinates of the position of the developed sign or the symbol, and to the control circuits of element 19, interstitial coordinate scanning unit 18 (for which a reversible counter can be used) and frequency divider 20, which determines the operating modes of these devices: connecting the input, setting the reverse and ensuring the setting of the division factor, those. setting the distance of the developed area between two nodal coordinates of the position of the unfolded sign or symbol. Next, the generated code in the inter-node coordinate scanning unit 18 is converted to voltage (current) in block 3, then amplified in block 2 and fed to the deflecting system of the CRT 1. Simultaneously with the formation of the sweep of a given sign or symbol at a predetermined position of the CRT 1 screen To the input of the frequency divider 20 and to the modulating electrode of the device 1, pulses are illuminated for the sign or symbol from the output of the control unit 3 through the amplifier 6 for the sign illuminator. The input information includes command codes. The commands are made to enable the respective modes of operation of the control unit 5 (editing.

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receive or transmit information, etc.) and generate the necessary pulses to synchronize the operation of individual devices of the proposed device for displaying information. For real-time information exchange between the digital computer and the operator, the control unit 5 includes a manual input device with a keyboard and a light pen unit 7 with a light pen 8, which allow the necessary information to be entered into the digital computer and output information from the digital computer. , correct the called information with the subsequent sending it to the digital computer for further processing.

Claims (1)

1. USSR author's certificate No. 811247, cl. G About K 15/20, 1978 (prototype). w