SU813406A1 - Device for dispalying graphic information on television receiver screen - Google Patents

Description

(54) DEVICE FOR DISPLAYING GRAPHIC

INFORMATION ON SCREEN TELEVISION

RECEIVER

The goal is achieved by the fact that two decoders and a register are connected to the device containing the first control unit, the synchronization unit, the second control unit, the video signal generator connected to the television receiver and the synchronization unit connected to the first control unit and connected to the second one control unit, video driver and with two decoders connected to the first control unit.

The drawing shows a block diagram of the device.

The device comprises a communication bus with a computer 1, a first control unit 2, a synchronization unit 3, a second control unit 4, a first decoder 5, a second decoder 6, a register 7, a video driver 8, a television receiver 9.

The device works as follows.

In contrast to the known, where the binary codes of the ordinates of the function go to the computer for processing, in the proposed device the codes go directly to the display device via the communication bus 1. With the communication bus 1, the received codes go to the first control unit 2. These codes are entered into control unit 2 during the reverse frame sweep. When entering control unit 2, ordinate codes are arranged in groups, each of which contains all ordinate codes corresponding to a given argument value (or argument numbers, if the display scales are different for different functions). The number of ordinates in a group is equal to the number of graphs displayed on the screen. In this device, the primary information on functional dependencies is displayed on the television receiver screen, i.e. the binary ordinate code is directly transformed into a single well-defined highlighted point on the screen.

According to the signals from block 3 of synchronization to blocks 2 and 4 during the flyback of the horizontal scan, from block 2 to the decoders 5 and 6 all the ordinate codes corresponding to the argument determined by the number of the television line are reproduced. Each ordinate code V is divided into two codes: V is the binary code of the number of the information signal of video signals and code UX is the binary code of the number of video signal in the group.

At the same time, У У, // УЛ, гд, е // - the operation of concatenation (concatenation) of codes.

Codes Y and Y are sent to the corresponding decoders 5 and 6, and according to the pulse of the record in register 7, the next unit of the position code is entered. Thus, after the specified cycle in register 7, an image of the television line of the screen is formed. With the beginning of the direct course lower case

The sweep information from the register / is transferred in parts (information groups) to the video driver 8, from where it is shifted to the CRT modulator synchronously with the clock pulses of the line decomposition elements. The information in register 7 is off and the beginning of the flyback of the line scan repeats the above described playback cycle.

The number of graphs displayed on the screen

depends mainly on the speed of the register 7. So, for example, when using

standard television receiver

(or regular TV) working

with line-period TB 64 µs

during the reverse course of 12-14 μs on

The screen can be displayed. To the graphs function:

K,

where T is the number of register writing or reading 7.

For typical modern storage drives with a random sample of capacity of several thousand h of bits - T 0.5-2 microseconds and, therefore, K 6-25 functions.

Thus, the proposed device has the following advantages: when operating autonomously (without using EVA, the screen displays the number of graphs of functions commensurate with their number when used to regenerate the image of the computer’s main memory, the device .i-jbHo In terms of reproducing the nature of the functional dependencies, it has a simple structure and a minimum number of high-speed (and, as a rule, more expensive) nodes, in addition, the used nodes and blocks are standard and the device is easily implementable.

These advantages create a technical and economic effect, which means that it is possible to create a cheap typical device for displaying graphic and alphanumeric information for computer systems with time sharing and autonomous devices for preparing and preprocessing information.

Claims (2)

Invention Formula A device for displaying graphic information on a television receiver screen, comprising a serially connected first control unit, a synchronization unit, a second control unit, a video signal generator connected to the television receiver and to a synchronization unit connected to the first control unit, in order to application area by increasing the number of displayed function graphs when the device can work autonomously, two decoders and a register are entered into it, Single with the second control unit, the former. video signal and with decoders connected to the control unit. Sources of information taken into account during the examination 1. Television methods and information display devices. Under. ed. M. I. Krivosheev, M., “Soviet Radio, 1975, UDC 621,397.6, p. 7-18, 66-73. 2. Television methods and information display devices. Under. ed. M. I. Krivosheev, M., “Soviet Radio, 1975, UDC 621.397.6, p. 70-72. 2