SU811325A1 - Indication device - Google Patents

Description

(54) DEVICE FOR INDICATION

The invention relates to electronic technology and can be used in sign display devices.

A device for indicating characters is known, which contains a character generator, whose input is connected to a source of information, a matrix indicator, one electrode system of which is connected to the output of the character generator through level drivers, a control device whose one output is connected to a scan control circuit, the output of which is connected to another system the electrodes of the matrix indicator, another output of the control device is connected to the sweep input of the character generator 1.

Another device for indicating ziacs is known, containing a character generator, whose address input is connected to a source of information, a matrix indicator, one electrode system of which, through shaper units, connects to the output of the character generator, a scan control circuit, the output of which is connected to another electrode system of a matrix indicator and a column counter, the output of which is connected to the sweep input of the character generator, and the counter inputs

columns and sweep control circuits are connected to the output of the clock generator 12.

The closest in technical essence to the invention is a known device for indicating signs, containing a character generator, whose address input is connected to an information source, a matrix indicator, one electrode system of which is connected to the character generator output, the scan control circuit, the outputs of which are connected to another electrode system of the matrix indicator, and a column counter, the output of which is connected to the scanning input of the character generator, and the counter inputs are one hundred btsov n scan control circuit connected to the output of the clock generator 3.

All these devices cannot fully utilize the capacity of the ROM on which the character generator is executed.

The aim of the invention is to expand the field of application of the device by increasing the amount of displayed information.

To do this, the device for indicating

containing a matrix screen, the horizontal bands of which are connected to the exit

a key block connected to a character generator, the first input of which is connected to an information source, and a clock generator, a counter and a scanner connected in sequence, a switch and a code converter, the input of which is connected to the output of the counter, are entered into the device, and the second output is with the first input of the switch, the second input of which is connected to the second input of the code converter and the input of the device, the input of the switch is connected to the information source, and the output is connected to the third im input sign generator.

The device for indicating characters contains a clock generator /, a switch 2, a code (column) converter 3, a counter 4 (columns), a character generator 5 connected via a key block 6 to a matrix screen 7, and a scanner block 8. At one address input of the character generator 5, an n-bit sign code is supplied from the information source, with the exception of one of the bits. One of the bits of the “-discount” sign from the information source is fed to the information input of switch 2. The output of switch 2 is connected to the / other address input of the character generator 5. The generator of clock pulses 1 is connected to the input of counter (columns) 4, the output of which is connected to the sweep the input of the converter input (column) 3 and the input of the scanner 8. The output of the scanner 8 is connected to the matrix screen 7. Odip output of the converter code column 3 is connected to the corresponding input of the switch 2. The control inputs of the switch and 2 and the column 3 code converter are connected and a control signal is applied to them.

In the absence of control signals, one of the digits of the character code through the switch 2 arrives at the address input of the character generator 5 and the information received at both address inputs of the character generator 5 forms the full-digit code of the sign. . At the same time, in the absence of a control signal, the code of the column, the passage without changes, through the code converter (column) 3, enters the unrolling input of the character generator 5, ensuring the scanning of the selected character synchronously with the scanning of the image on the matrix screen 7.

When the control signal is applied to the inputs of switch 2 and code converter (column) 5, instead of one of the digits of the sign code, the signal generator 5 receives a signal from switch code (column) 3 through the switch 2, which converts the column code as follows. ; Since the matrix of a semiconductor ROM used to build a character generator, the memory

the outline of a single character consists of 7x8 cells, then the three columns in each matrix are left free to form 7X3 cells. The column code converter 3 changes the code of the column so that free columns from one matrix are selected first, then the signal from the output of the converter is measured}, another matrix is selected and the column code selects free columns from another matrix.

Naimer, if X, Y2 / UZ

UZ UZ. / U2 UZ. L V U2

  LU1 / / 1U1,

where X „is the signal from the output of the converter; A is a control signal;

U1, UZ, U2 - first, second and third

column code bits;

, U2, UZ - the first, second and third bits of the transformed column code.

Then, when the control signal is applied to the input of switch 2 and column code converter J, columns 8 and 7 will be selected in one ROM matrix and then columns 8, 7, and 6 will be selected from the other ROM matrix.

The introduction of the column code converter and the switch allows, with the same capacity, ROM, which is performed

character generator. 1.5 times increase the number of displayed characters. Nairimer, a device that displays only the Russian alphabet, mathematical signs and punctuation marks, can display the letters of the Latin alphabet further.

Claims (3)

1. USSR author's certificate No. 485477, cl. G 06 K 15/18, 1973. From the source of the peak uHipop HOlfvUV 2. Journal "Electronics № 5, 1970, p. . 3. The Electronic Engineer, “Dot matrix lights with gas No. 9, 1969 (prototype).