SU451107A1 - Device for displaying information - Google Patents

Description

one

The invention relates to automation and can be used in visual equipment for displaying data from an electronic computer.

Information display devices are known that contain a character generator and an address register connected to the input buses, a digital-to-analog converter, the input of which is associated with the output of the address register, and the output with the output bus.

However, the dimensions of the signs and the address scale along the axes at the edges of the screen of the electron-beam tube are distorted, especially when using tubes with a deflection angle of up to 110 °.

In order to improve the accuracy of information display, a decoder of correction zones, an address correction block and a sign correction block, whose inputs are connected to a character generator, an address register, to the output of a decoder of correction zones, and to an input of an address correction block, whose output is connected to a D / A converter, are entered into the device, and the input of the correction zone decoder is associated with the address register.

The drawing shows a schematic diagram of the proposed device.

Device for displaying information contains character generator 1, character correction block 2, address register 3, digital-to-analog converter 4, address correction block 5

and the decoder of the correction zones 6. The generator 1 and the address register 3 are connected to the input buses connected, for example, to a computer. The output busses of the device are connected to a CRT.

On the command of a computer, the symbol generator 1 performs the formation of the signals scanning signals on the CRT screen.

The address register 3 is connected with all its output bits to a digital-to-analog converter 4, the outputs of the lower bits of the register of address 3 are connected to the inputs of the character correction block 2 and the address correction block 5, while the outputs of the higher bits are connected to the input of the correction zone 6 decoder.

Character correction block 2 resizes

mark in accordance with the code received

from address register 3. Address correction block 5

scales the address according to

the code coming from the address register 3.

Decoder zoe correction; 6 is connected by an output to the inputs of the character correction block 2 and the address correction block 5.

The digital-to-analog converter 4 and the character correction block 2 are associated with a CRT deflection system.

The operation of the device is as follows.

From the computer to character generator 1 and address register 3, the character code and the address code of the point on the screen in which the character is to be displayed, respectively. In this case, at the output of the character generator 1, the scan signals of the CRT beam are generated corresponding to this symbol, which are placed on the sign correction block 2. The address code from the register 3 enters the digital-to-analog converter 4.

At the same time, the COLT, high-order address bits are sent to the decoder of correction zones 6, and the low-order codes to the character correction block 2 and the address correction block 5. The decoder of correction zones 6 generates signals corresponding to a point in one of the correction zones. The entire screen is divided into zones, within which the size of the characters varies linearly from the minimum size in this zone to the maximum. The sizes of the ziak between the zones differ according to the law determined experimentally. In the same way, the scale of conversion of an address code within a zone varies linearly, and from zone to zone, according to a special law that ensures the linearity of the deviation on the screen. When the low-order codes are applied to the circuit of correction block 2, the block transfer ratio varies linearly, and when signals are received from the decoder of correction zones 6, the transfer ratio of this block changes according to the law corresponding to the sign size change between zones. Upon receipt of codes of younger bits

The address correction block 5 at the output of the latter appears in a voltage varying linearly. The extremes of linearly varying voltages are changed by signals of correction zones received at block 5 from the decoder of correction zones 6 according to the law of the scale of transformation. The output voltage of the address correction block 5 is supplied as a reference to the digital-to-analog converter block, providing a corresponding change in the scale of the conversion. Then, the corrected signals of the sign scan from block 2 and the address scan from block 4 are fed into the deflection circuits of the CRT, ensuring the display of characters of the same size and its entire field.

Subject invention

A device for displaying information, containing a character generator and an address register connected to the input buses, a digital-to-analog converter, the input of which is associated with the output of the address register, and the output with an output bus characterized in that, in order to improve the accuracy of information display, the device is entered correction zone decoder, address correction block and mark correction block whose inputs are connected

to the character generator, the address register, to the output of the decoder of the correction zones and to the input of the address correction block whose output is connected to the digital-to-analog converter, the input of the decoder of the communication correction link with the address register.

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