SU640340A1 - Information display - Google Patents

Description

one

The invention relates to the field of automation and computer technology for converting data from machine code into symbols displayed on a matrix screen.

A known device for displaying symbols on a matrix screen, comprising a block of buffer memory and a matrix screen interconnected via switching elements 1.

The closest technical solution to the invention is a device comprising a matrix screen, a memory unit connected to the control unit 2.

The disadvantages of the known devices are in the large volume of the memory block, which causes an unacceptably small time to access it and, as a result, a small number of decomposition elements in the matrix screen. To provide the required number of decomposition elements in it, the device consists of several identical component parts with a single composite matrix screen, which increases the overall weight of the device, complicates it and reduces reliability.

The purpose of the invention is to expand the field of application of the device by increasing the number of decomposition elements in the matrix screen and increasing the reliability of the device.

This goal is achieved by introducing two decoders, two key blocks, four flip-flops, a register, a binary counter, a comparison block, a pulse generator, AND, OR elements and two reversible counters, two control inputs of which are connected to the control unit, information the inputs are with the memory unit, and the outputs through the corresponding decoders and key blocks are connected to the matrix screen, the control inputs of the triggers are connected to the control unit, the information ones are connected to

the memory unit, the outputs of the first and second flip-flops are directly connected to the inputs of the corresponding reversible counter, and through the first and second elements OR are connected to the third element

OR, the output of which through the first element AND is connected to the information input of a binary counter, the outputs of which are connected to the first inputs of the comparison unit, the second inputs of which are connected to

the register outputs, one of the control inputs of which is connected to the control unit, the information inputs to the memory unit, the output of the comparison unit through the fourth element OR is connected to the second

the control input of the register, Ztoron, the input of the fourth element IL Pi is connected with the control unit, the outputs of the first and second elements IL1-1 are connected to the first inputs of the second and third elements AND, the second inputs of which are connected to the output of the pulse generator, the third inputs connected respectively with the output of the third and fourth triggers, the outputs of the second and third elements And directly connected to the inputs of the corresponding reversible counters and through TiiiH elsmsg 11L11 with the inputs of the key block.

The drawing shows a block diagram of the proposed device.

The device contains reversible counters 1 and 2, binary counter 3, triggers 4-7, register 8, decoders 9 and 10, key blocks 11 and 12, comparison block 13, pulse generator 14, elements AND 15-17, elements OR 18-22 matrix screen 23, control unit 24 and memory block 25.

The device works as follows.

The start of the formation of the symbol from the control unit 24 receives the control signal "a", which resets the reversing meters 1 and 2, the binary counter 3 and the triggers 4-7 directly to zero, and the register 8 through the cell - the fourth element OR 21. After this execution the operation in block 24 produces a " c. During the execution of this operation, the code of the number of decomposition elements in the symbol segment l is written to the register 8 from the memory block 25; (first for dl), in counters 1 and 2, respectively, the starting point codes of the symbol {xo} and {y / o} displayed on the matrix screen, in triggers 4 and 5 - {signxi} and {sign y}, respectively, in triggers 6 and 7 - {zxi} and {Zyi} are signs of the selection of elements of the matrix screen 23 in horizontal and vertical clippings.

The outputs of the trigger 4 are closed at the inputs of the counter 1, thus achieving its switching to the summing or subtracting mode of the pulses arriving at the counting input. Similarly, the counter is controlled by 2 signals from the output of the trigger 5.

The outputs of counters 1 and 2 through the Denifraters 9 and 10 and the elements 11 and 12 are closed on the paddle electrodes of the matrix screen. This ensures the selection of the initial point relative to which the elements of the ME decomposition that are included in the generator of the reproduced symbol are selected.

The signals from the outputs of the trigger 4, the first element OR 18 are closed to the input of the second element AND 16. And the second input of this cell receives a signal from the output of the third trigger 6. If {2fig} {1}, the pulses from the generator 14, operating in self-excitation, pass through the li 16 element to the counting input of the binary counter, the pulses arriving at the counting input of counter 2 are formed in the same way. As a result, the contents of either counter 1 or counter 2 are changed, which is achieved through deschiffors 9 and 10 and along the stripes of the matrix screen. The signals from the BTopoio outputs, the third elements AND 16 and 17, and through the element fifth element OR 22 are closed to the second inputs of the key blocks 11 and 12, the outputs of which are closed to the switched strip electrodes ME 23.

"The light of selectable elements of the matrix screen, if {y-,}, or {% r} {1}, these two equalities hold simultaneously.

The outputs of the triggers 4 and 5 through the elements

OR 18 and 19 are closed to the input of the third element ILR1 20, the output of which is closed to the input of the first element AND 15. To the second input of this element AND 15 is closed the output of the generator 14. Signals from the output

element 15 comes to the counting input of the binary counter 3 until its content is equal to the contents of register 8. In this case, the comparison unit 13 generates a signal that resets the OR 21 register 8 to zero. The same signal informs the control unit 24 about the end of the nth segment of the symbol. Register 8 is written, and triggers 4, 5 are written .gnyi ,.

the corresponding values for i-f 1 Segment, etc .;

On the sign {W}, which blocks the signal "c, which is not shown on the circuit due to lack of principle,

transition to the formation of the next character.

Claims (1)

Invention Formula A device for displaying information comprising a matrix screen, a memory unit connected to a control unit, characterized in that, in order to expand the field of application of the device beyond the account of the increase in the number of elements decomposed in the matrix screen and the increase in the device's endowment; two descramblers, two key blocks, four triggers, a register, a binary counter, a block are entered into it comparison, pulse generator, elements AND, OR and two reversible counters, two control inputs of which are connected to the control unit, information inputs to the memory block, and outputs through the corresponding decoders and key blocks to the matrix screen, the triggering inputs of the flip-flops are connected to the control unit, the information ones to the memory unit, the outputs of the first and second flip-flops are directly connected to the inputs