SU1522274A2 - Device for controlling gas-discharge matrix panel - Google Patents

Abstract

This invention relates to automation and computing. The purpose of the invention is to expand the field of application by being able to control the selectively maintain bit signals to form a halftone image. The goal is achieved by introducing a fourth group of decoupling elements on the diodes and discharge support keys for each of the X and Y coordinates, which allows for the organization of selective support voltage and the ability to control the cell power of the matrix discharge panel. 3 il.

Description

The invention relates to control devices for indicator devices, can be used in devices for displaying information containing gas discharge display panels (ACU) of alternating current with elements of a half-tone image and is an improvement of the technical solution according to Aut. St. No. 1304056.

The purpose of the invention is to expand the field of application by being able to control the selectively maintain bit signals to form a halftone image.

Fig. 1 is an electrical circuit diagram of the device; Fig. 2 is a timing diagram of the operation of the device in the hold mode with the formation of a halftone image; FIG. 3 is a time diagram of the operation of the device in the write-erase control mode.

A device for controlling the matrix discharge panel comprises

For each of the X and Y coordinates, diodes 1–4 of the isolation of the first, second, third, and fourth groups, resistors 5 and 6 of the current-limiting elements of the first and second groups, familiarity selection key (3M), tire selection keys 8, group charge keys 9, GUI 10, first and second charge keys 11,12, bit key 13, maintenance keys for bit 14, first 15, second 16, third 17 and fourth 18 power buses. The operation of the device is illustrated by diagrams 19-31.

The device works as follows

The operation is characterized by two modes: the maintenance mode and the write-erase control mode. In the maintenance mode, the charge and discharge keys 12, 13 alternately operate on the control signals 19, 20, as a result of which, on the X and Y coordinates

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At the outputs of the keys 12, 13, the signals 21, 22 are generated, and a differential voltage of 23 acts on all the cells of the HST (section a in Fig. 2) "This voltage is combined with the wall voltage of the ISU cells and causes the glow of the ISU cells in which The information was recorded in person, in the section of Fig. 2, the voltage that is maintained for all the cells is the same, and the brightness of all the pixels in the image is the same. In order to form different brightness of HIP cells in the proposed device, a selective maintenance voltage is organized. For this, one or several keys 14 are turned on, all bus selection keys 8 are turned off, and the charge keys group 9 is turned on, ensuring the formation of a small pulse supporting pulse. As a result, in addition to the main supporting voltage (a

Fig. 2) on the selected 3M coordinates 25, maintaining the cell bits not

a small span, and the bits of the ISU cells with selective maintenance does not occur.

, Record management mode - erasure is no different from the operation of the device according to the basic invention. The charge and bit switches 11–13 by alternate operation of the corresponding control signals form a step-shaped voltage on the ISU electrodes (diagram 29, 30 for X, Y coordinates in FIG. 3). The resulting supporting voltage of the control mode contains two intermediate levels (diagram 31.), control levels are superimposed on these levels (shown in dotted line in Fig. 3). If control pulses follow during

0 passing the low level stage (section g of diagram 31), then discharges without recharging and stenochnyh containers, with distant

X and Y acts additional, causing the glow of the cells of the ISU in the selected 3M and increasing the brightness of these cells (dotted pulses in section 6 of figure 2). In contrast to the main supporting voltage, the frequency of the selective support of the 5V vector voltage can be increased by a factor of 2-3, for this the potential of the power supply bus 17 should exceed the potential of the bus 16 by a few volts, this gives a large number of gradations of brightness,

 In addition to the described increase in the p-capacitance versus the nominal one, the device makes it possible to reduce the brightness on the selected 3M. To do this, in the pause 1 between the main supporting pulses, selective supporting pulses are excited in the same way (dashed pulses on Jy4acTKe in Fig2). At the same time, if one or several GCs are selected on the X coordinate (chart 24), on the coordinate: Y dinate there are also several GCs (chart 25), then in the summary chart for the semi-selected GUI cells (chart 26 for the X coordinate and 27 for the coordinate Y) the full voltage of the supporting voltage acts, and the illumination occurs with a nominal brightness. For the selected 3M coordinates (diagram 28), the supporting voltage is valid from 0

five

0

five

0

five

happens, the information is erased. In the case of control at a high level point (section g of diagram 31), the voltage selected for both HYP coordinates exceeds the support voltage and discharges occur, which continue with further maintenance. These control pulses are produced by the action of the addressing keys. The selector keys 3M through the resistors 5 supply the voltage from the power supply bus 18 to the 3M electrodes through the non-switched keys 8 and the isolation diodes 1 establish the potential of the supporting voltage.

The proposed device has a much wider possibility of obtaining a halftone image. To obtain a high-quality image, it is necessary to make the size of the SM with the same brightness of the elements minimal, the proposed device allows to increase the number of keys for this purpose. 14.

The use of selective control, in addition to improving the thermal mode, allows to improve the quality of a halftone image. With a Cycle duration of 40 ms, the number of brightness gradations 8 and the frequency of selective support for 150 kHz are the number of elements of halftone

reaches 750. The possibility of selectively reducing the luminance makes it possible to considerably simplify the procedure for obtaining the image by eliminating from the control the rewriting of the details of the image with medium brightness.

Claims (1)

Formula invented and- A device for controlling a matrix gas discharge panel according to the ed. St. 1304056, characterized in that, in order to expand the area of 15 using the option of controlling the signals to maintain the discharge o to create a half tone image, the fourth group of isolation elements on the diodes and the keys supporting the discharge, whose information inputs are connected to the third power supply bus, control inputs, are entered into it are the control inputs of the device, and the outputs are connected to the anodes of the diodes of the second group and to the cathodes of the diodes of the fourth group, the anodes of which are connected to the output of the bit switch.