SU1472942A1 - Device for displaying at screen of tv indicator - Google Patents

Abstract

The invention relates to automation and computing and can be used to display information from a computer. The purpose of the invention is to improve the accuracy of the device. The device contains synchronization unit 1, television indicator 2, interface block 3, first 4 and second 16 blocks of buffer memory, first 5, second 6, third 7 and fourth 15 registers, 9-character generator, first 8 and second 13 switches, unit 10 AND elements, OR 11 element, video signal driver 12, first 14 and second 17 decoders with corresponding links. Commands for displaying signals and graphs are read from blocks 4 and 16 of memory into registers 5, 6, 7, 15. The character codes entered into the generator of 9 characters are converted into the video code of characters. The graphic codes are switched by the switch 13 and, comparing with the current position of the beam in block 10 of the elements AND, are converted into a video code of the graphic that is summed up on the element OR 11 with the video code of the signal and is fed into the video signal generator 12. The color of the image and background is controlled by the first 14 and second 17 decoders and the first switch 8, which controls the video signal generator 12, which forms the video color signal for the television indicator 2. 3 sludge.

Description

J14

The first decoder 4 contains the first 18, the second 19 elements NOT, the element 3-2-3 AND-3 OR 20.

The device works as follows.

The synchronization unit 1 generates horizontal and frame sync pulses for synchronizing the sweeps of the television indicator 2, as well as addresses of accessing the buffer memory blocks 4 and 16 when reading information from them.

The information to be displayed is encoded in formats of graphic and character commands (FIG. 3). In the device exchange mode with a computer (not shown in Fig. 1), through the interface block 3, the symbol commands are recorded in the buffer memory block 4, and the graphic ones in the buffer memory block 16, addressing which use non-intersecting areas of the address space, and the information is recorded in the cells of memory blocks 4 and 16 in the order of display on the screen. The synchronization unit 1 generates address signals by which sequential reading of the contents of memory blocks 4 and 16 is carried out, which in display mode are read in parallel cyclically through frames and synchronously with scanning the beam through the screen lines.

The word read from memory block 4 is written into the first 5 and third 7 registers, the symbol code is stored in the first register 5, and the service information is stored in the third register 7, (bits 8–15 words in FIG. 3a). Synchronously, from the block 1 6 of the buffer memory, the word is written in the second 6 and fourth 15 registers, and the codes of the displayed points of the graph are written to the register 6, and the signs of the display of the graph elements and the priority bit are written to register 6 (bits 12-15 in FIG.

When displaying characters, a 9 character generator converts a character code into a video code corresponding to a character image. The 9-digit generator is made on the basis of a permanent additional storage device.

ROM, the upper address bits of which are determined by the character code coming from the output of the first register. 5, and the lower bits of the address are determined by the codes of the current television line familiarity and the current code.

five

five

0

0

element in familiarity, coming from block 1 synchronization. The video code from the generator output of 9 characters is fed to the second input of the element OR 11, to the first input of which the video code is supplied to the graphic component s which is formed as follows.

From the output of the second register 6, the four point codes read from the second block 16 of the buffer memory are fed to the input of the second switch 13, which, under the control of the signals from the third output of the synchronization unit 1, ensures that 10 elements AND codes of each point arrive at the first input of the block , representing the binary numbers of the television lines in the familiarity, on which the points of the graph should be displayed. If the code of the line and the code of the current television line of familiarity from the output of the group of 10 elements matches, the signal goes to the first input of the element OR 11, which reduces the video codes of the symbolic and graphic components of the familiarity. The resulting signal is fed to a video signal shaper 12, in which, under the influence of code signals from the output of the first switch 8, chrominance signals are generated for the television indicator 2.

The code for controlling the colorization of symbols and graphs, as well as the setting of the display mode, is formed by the switch 8, the information inputs of which are connected to the outputs of the bits of the third register 7 characters and the fourth register 15 signs of graphs, and the output of the first decoder 14 5 controls the connection of the outputs of these registers ( Fig. 2), which permits the coloring of symbols and graphics within one familiarity. The outputs of the bits of the third register 7 are connected to the output of the first switch 8 in the following cases: when displaying the background of the graph (the output of a group of 10 elements And is in the zero state), the background of the symbol is output at this familiarity point, as in the zero state of the generator output 9 characters indicate the unit potential at the output of the second decoder 17; when displaying the background of the graph (at the output of group 10

five

0

0

five

elements And there is a logical zero level) at this -AC point of familiarity the symbol is displayed (at the generator output of 9 characters the level of the logical unit); in the case of overlapping at the same point of familiarity gra Fika and a symbol (at the outputs of the block 10 elements And the generator 9 characters there are logical units), with a single 15th word rank (Fig. 36), as evidenced by the state of the second the output of the fourth register 15. If O is recorded in the 15th digit (Fig. 36), then the points of the graph are displayed on the screen.

After displaying one character string under the action of code combinations from the second output of synchronization block 1, words from memory blocks 4 and 16 are read to display the next character string.

Thus, the invention provides an increase in the accuracy of the device by allowing simultaneous display in one familiarity of the symbolic and graphic components of the image, which allows to obtain on-screen continuous graphic dependencies that are not overlaid with symbolic information.

Claims (1)

The invention device for displaying information on the screen of a television indicator, containing a synchronization unit, interface unit, first buffer memory unit, first, second and third registers, character generator, first and second switches, AND unit, Video signal generator whose output is connected to the video input of the television indicator, the sync input of which is connected to the first output of the synchronization unit, the second output of which is connected to the address input of the first block of the buffer memory, the first output of which connected to the information input of the first register whose output is connected to the first address input of the character generator, the second address input of which and the control input of the second switch are connected to the third output of the unit 729426 synchronization, the fourth output of which is connected to the third address input of the character generator and the first input of the block of elements II, the second inputs of which are connected to the output of the second switch, the information input of which is connected to the output of the second register, the first information The IQ input of the video signal generator is connected to the output of the first switch, the first information input of which is connected to the output of the third register, whose information input is under 15 keys to the second output of the first buffer memory block, whose information input is connected to the output of the interface block, whose information input is information input2Q% of the device, which means that, in order to improve the accuracy of the device, it contains the first and second decoders, the OR element, the second block of buffer memory and 25 fourth register, the first output of which is connected to the second information input of the first switch, the control inputs of which are connected, to the output of the first decoder, the first 30 whose information input and the first input of the OR element are connected to the output of the AND block, the second information input of the video signal generator is connected to the output of the OR element, the second input of which and the second information input of the first decoder are connected to the output of the character generator, the third information input of the first decoder is connected to the output 4Q of the second decoder, the inputs of which are connected to the output group of the first register, the fourth information input of the first decoder is connected to the second output of the fourth register, The 45 information input of which is connected to the output of the second buffer memory block, whose information input is connected to the first output of the interface block, the address input of the second buffer memory block is connected to the second output of the synchronization block, the information input of the second register is connected to the second output of the second block buffer memory. 35 m 2 4p P fi 7t (toff character a) Word format, character information. 1p B B R 5Р 6p 7p (- 2-point code -5 e-Code - 3-points  Color tet about $ Format ctiota graphic information Compiled by 0. Dapko f4 / 2O, Editor N. Gorvat Tehred A. Kravchuk Proofreader L. Zaitseva Order 1716/50 Circulation 470Subscription VNIIPI of the State Committee on Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Ft 1 10f 11p up Vp p 15p b Recognized ft colors at IFlicker Sign Recognized inversion  Recognized background 9p Wp Er Etc U % iff  Recognizing the I-character graphs - &  Color tet about