SU514313A1 - Character generator - Google Patents

Description

one

The invention relates to automation and computing; 1; 1: 1 | tehnix and can be used when building ycTpoiicTB display information.

A known character generator, the contents of a serially connected character memory, an identifier associated with a depressor, an AND element, a shift register and a cathode ray tube, as well as a control unit, a switch to the symbol memory block, an X-ray tube on the element AND.

The pre-generator generator is different in that it introduces two frequency dividers, comm nsn1) 1e with a memory std. Memory clock and a block controller, and the frequency divider is connected to the receiver, and the other one is connected to the shift) to the fighter This allows the thickness to be jiggled, they are ayy | yen symbol, proportional to the size of its size.

The drawing is a block diagram of the alternate generator.

It contains b.chook memory pt simvo.pov 1, ngfrator 2, element “And 3, sdvngayuyuin register 4. denshfrator 5, 6: ioK control (i, Divide, 7 and 8 and e.1ektron 10-rayer tube ) 9.

B: 1ok y raspn (i (1) C) |)) Image of a block of symbols of characters 1. Block 1 H1 of fratho |) 2 ko.h symbols. Od} ovre2

Manually, the control unit 6 through the frequency divider 7 generates a signal to the decoder 5, but to which deprafrato 1 determines the row of the microsystem. The information about this line through the element "And 3 at 1 resolution of the signal from the control unit for 1nsvayutsya in the register 4. At its input from the control unit through the frequency divider 8, and the shift pulses. Shifting the register and reconverts the parallel code stored in it into a sequential code and feeds it to the output of modulating the brightness of the CRT beam 9. The control unit also generates the deflection of the CRT beam on the X and Y axes.

 Thus, there is a recording of the information ODN011 lines) C1 of the mvol. Then U) is repeated for its other rows, and so on.

The need for a bridge reproducible 1 U census of the CRT From the mvol in increasing the size of the command and size comes 3 blocks 1 at a frequency split of 7 8. Frequency divider 7, control Osh, the size of 1 Mb of the U axis U. mind Makes the frequency of catch ,

Ioetuna Oh ,. from the block at К1ВЛен Я at De P1 fjiaTop 5. At this, the frequency o ipoca И1 frator 2 is stored 1, since the frequency is saved, n}) and the run is 1x FROM the unit 1 ia В «И 3. Therefore, information about this line Corrastra non-transforms from the shifter 2 into the shift register 4 several times and, therefore, several lines of the microraster with the same information are reproduced on the CRT screen, i.e. each character string increases vertically as the vertical size of the symbol increases. Frequency divider 8, which controls the size of the symbol along the X axis, reduces the frequency of the pulses coming from the control unit and the shift register 4, which drives the timing to increase the playback time of each line of the microraster on the CRT screen, i.e., each character string and the symbol itself ) horizontally.

The device works similarly when displaying reduced character sizes.

Thus, when a symbol is resized, a simultaneous proportional change in the thickness of the line describing the symbol occurs.

Claims (1)

Invention Formula A character geyoretor containing serially connected character memory, an encoder associated with the decoder, the AND element, the shift register and the electron beam tube, the control unit connected to the character memory block, the electron beam tube, and the AND element differing in that in order to improve the quality of the image of characters entered into it two frequency dividers connected to the symbol memory and the control unit, one frequency divider connected to the decryptor and the other to the shift register.