SU1675932A2 - Display unit - Google Patents

Abstract

The invention relates to automation and computing and is an improvement to the device according to the author. St. No. 1474729. The purpose of the invention is to increase the brightness of the image. The goal is achieved by controlling the delay time of switching on the segments from the additional outputs of the memory block. This ensures the elimination of the segment on-off delay, which must be canceled when forming the image of this symbol. The time taken to form a symbol decreases, hence the brightness of the image increases. 3 il.

Description

The invention relates to automation, computing and measurement technology and is an improvement of the device according to the author. St. isfe 1474729.

The aim of the invention is to increase the brightness of the image as a result of reducing the part of the operation cycle of the device, which is spent on forming the stepped control current of the indicator.

FIG. 1 shows a block diagram of the device; in fig. 2 is a functional diagram of a controlled block of delay elements; in fig. 3 - time diagram of the device.

The device contains a clock pulse generator 1, a constant sensor 2 controlled by it, in which the outputs of the first group are connected to the control inputs of the indicator 3, and the outputs of the second group - with the address inputs of the memory node 4, whose information inputs are the information inputs of the device, block 5 elements And, whose outputs are connected to the segment inputs of the indicator 3,

the first inputs through the converter 6 codes are connected to the outputs of the memory node 4, and the second inputs are connected to the outputs of the block

7 delay elements, the control inputs of which are connected to the generator 1 and the converter 6 codes, the block 8 of memory, consisting of the node 4 memory and the converter 6 codes.

Block 7 of delay elements includes series-connected controlled delay element 9 with possible delay times 0, g, 2 tons, four controlled delay elements 10 with delay 0, t, and two delay elements 11 with delay time t. Element 9 is implemented (FIG. 2) on two delay elements 11 and switch 12 (element AND-AND-OR), element 10- on element 11 of delay and switch 12. The delay time of element 11 is much longer than the delay time of logic control elements and device nodes.

8 depending on the control signal, for example, element 10 or does not delay the signal (it only delays for the time of reON V | СЛ О СО hO

switching on the logic elements of the switch 12), or delays by time t (compared to which the switching time of the logic elements can be neglected).

The device is obtained by adding to the prototype a new connection of the control inputs of the block 7 of the delay elements with the additional inputs of the block 8 of the memory.

The generator 1 contains a pulse generator with a frequency limited by the lower condition for obtaining a flicker-free image and an adjustable duty cycle (dotted input, Fig. 1) for adjusting the brightness of the image.

A constant sensor is implemented, for example, on the basis of a counter on p (n is the number of bits of the indicator) and a decoder connected to it (if necessary with agreement with the level of control inputs of the indicator 3).

Reading information from memory node 4 is bitwise: for each mz n bits, a 4-bit information word corresponding to one of the characters used appears at the output of the memory block at the output of the memory bit of the given bit. the alphabet.

Indicator 3 is an n-digit sign-synthizer.

In the known device converter codes 6-type Converter in the code of the segments of the indicator. In the proposed device, the converter 6 is supplemented with control elements of the first in the connection sequence by a controllable delay element. These elements in this example implement the following functions: a 1 + 2 + 3 + 5 + 7, in 0 + 4 + 6 + 9, where 0.19-decimal alphabet character codes, In particular, when forming one of the symbols O, 4, 6 or 9. These functions are implemented based on matching schemes.

The operation of the device is shown on the example of the formation of symbol 2.

Under the action of pulses from the generator 1, the sensor 2 constants with the signals from the outputs of the first group sequentially polls the bits of indicator 3, giving the enabling signals to the control input of each of the bits, and the signals from the outputs of the second group (in the address code of the node 4 memory the node 4 of the memory. At the polling signal at the control input in this bit of the indicator 3 a symbol is highlighted, the code of which is currently located on the information (segment) inputs of the indicator, i.e. the information relating to this bit. formed image of the next bit, etc.

The pulses from generator 1 arrive and

to the input unit 7 delay elements. According to Log.1, from generator 1, the segments are turned on, and according to Log.O, they are turned off (Fig. 3). . When forming symbol 2, delay elements 10, controlled from outputs B1 and E1 of converter 6 of codes, delay the signal by time r, and elements 10, which are controlled from outputs F and C1, practically do not delay the signal.

After the arrival of Log, 1 from generator 1 from generator 1 to the first input of block 7 of delay elements, Log.1 almost immediately appears at the output of block 7 (via the repeater of element 12). Included

the segment B is a signal from the corresponding element AND of the block 5 elements AND, After a delay time t Log, 1 appears at output E (segment E is turned on), then almost simultaneously Log.1 appears at outputs F. Cu and D. From these Log.1 includes only the D segment. Since the outputs of the converter 6 of the F and C1 codes, by the code of the segments of symbol 2, are Log.O. Further consistently with

the delay t includes segments A and C. Light mc are all symbol segments. And this luminescence lasts until the pulse completes from generator 1,

Upon completion of the pulse to the input block

7 delay elements from generator 1 will be received by Log.O. Through the delay time 2, this Log.O on Vits at output B (switch 12 on the control signal from the additional output of converter 6 passes the signal from the second of the series-connected delay elements 11 to the controlled delay element 9). Because of this, Log.O. segment B goes out, and the remaining segments continue to glow. Then, with a delay t, the segment E is turned off. Then, after a time r, Log. O appears at the outputs F, c and D1) and the segment D is turned off. Sequences A and C are subsequently switched off.

Along the next impulse of the generator 1, the segments start up again.

Switching segments on and off in the proposed device is faster than the known one. In particular, with symbol 2, the time when all the segments of the symbol in the given digit of the indicator are lit is greater for the proposed device than for the well-known 4t (Fig. 3).

Accordingly, the increase in the time when all the segments of the symbol are luminous, the brightness of the image increases.

The implementation of the invention has a positive effect, expressed in improving the image quality by increasing the brightness of the formed image.

Claims (1)

The invention of the device for display on the author. St. No. 1474729, characterized in that in order to increase the image brightness, the control inputs of the delay elements are connected to the additional outputs of the memory unit. && g 1 g In L FI & JB EUC I g -1 1 о о tfVV 7 t-I I I smjtfhwr  b «« w «J1i ™ A D v--J Yu vf k  With vO vA rff FIG. 2 like Fig.Z