SU963083A1 - Information displaying device - Google Patents

Description

(5) DEVICE FOR DISPLAYING INFORMATION

-. . The invention relates to automation and computing and can be used, for example, in information display systems on the screen of a matrix gas discharge indicator based on an AC plasma panel.

There are known devices for displaying on the basis of an AC gas discharge display panel, the horizontal and vertical centers of which are connected via blocks of keys to the row and column decoders. In such devices, the simplest functional way of displaying information takes place, the essence of which is that the binary codes of the controlled point (respectively, vertically and horizontally) are fed to the input of the row and column decoders. Signal Simultaneous Recording (or Selective Erasing) triggers the ignition (or blanking) of the selected

binary codes of a point on the screen of a matrix gas-discharge indicator. f Display devices of this type have a number of advantages.

5 This is primarily the presence of internal memorization and the related lack of restrictions on the amount of output information, the simplicity of the digital control, the absence of geometrical

o Distortion, smaller dimensions, increased brightness and contrast of the image L1.

The main disadvantage of these solvents is the increased recording and editing time for large amounts of character information. The recording time (erase) of a single point is usually t, 20 µs. 20 To reduce the value of t, parallel recording (erasing) is often introduced. However, this significantly complicates the addressing block scheme. Closest to the present, there are devices for displaying information on a television indicator screen, containing a clock generator, a horizontal scan counter, a vertical scan counter, a memory device per frame of displayed information, a persistent character configuration memory (character generator), and a video signal generator f2j. Such devices are simple in design and have small dimensions, but their use is possible only when using a television indicator (at a frequency of the master oscillator of the order of 10 MHz). An attempt to use, or as an indicator of a matrix gas discharge panel (ripA reducing the frequency of the master oscillator to 50 kHz). Will lead to unsatisfactory values of t, as can be seen from the above calculations. The purpose of the invention is to increase the speed and expansion of the area of the device, by providing a display both on the matrix and on-display indicator and on the television. This goal is achieved by the fact that a device for displaying information containing a pulse generator, sequentially connected horizontal and vertical scan counters, whose outputs are the first and second outputs of the device, the memory block whose first input is the first input of the device and the output connected the first input of the character generator, the second and third inputs of the memory unit and the character generator are connected to the outputs of the horizontal and vertical scan counters and the driver of video pulses, the input to The first is connected to the output of the character generator, the first and second elements are entered, the first and second single vibrators and the element whose output is the third output of the device and connected to the first input of the first terminal And the second input of which is connected to the output of the pulse generator, the output of the first element And connected to the input of the horizontal scan counter, the second input of the video pulse generator and the first input of the second element I, the second input of which is connected to the output of the video pulse generator, the third input is the second 9 3 input device, the output of the second element And is connected to the input of the first one-shot, the output of which is connected to the input of the second one-shot and the first input of the element OR-NOT, the second input of which is connected to the output of the second one-shot, the output of the video player imaging unit is the fourth output of the device, On The drawing shows the scheme of the proposed device. The circuit contains a pulse generator 1, a horizontal counter 2, a vertical counter 3, a memory unit k, which is a random access memory per frame of displayed information, a character generator 5, a video pulse shaper 6, a second And 7 element 8, the second 8 and the second one-shot and element OR-NOT 10, the first element 11 and 11, the first outputs 12 and 13 of the device, which are fitted with control buses for the current position of a point on the screen, the first information input of the device 1, the fourth input of the device 15, which is The backlight control bus on the television indicator, the second input of the device 16, which is the operating mode control bar, the third output of the device 17, which is the control bus1 1 recording on the matrix discharge indicator. The input bus 16 sets the operation mode of the device. There can be two such modes. The state of logical zero on pin 16 corresponds to the no recording mode on the matrix indicator (i.e., the usual support mode — information storage) and the constant regeneration mode on the television indicator. The state of a logical unit on bus 16 corresponds to the mode of recording (updating) information on a matrix indicator or interrupting (short-term) indications on a television indicator. When only the television indicator on the bus 16 is included in the display device, the logical zero state should be constantly maintained. When the matrix (or both types of indicators) are turned on, the logical unit should appear only for the time of recording (updating) information on the plasma screen. This time corresponds to the time of one frame. The device works as follows. The initial mode of operation is the logical zero mode on bus 16. In this case, the launch of one-shot 8 and 9 is impossible (since the output element And 7 signal is absent due to the presence of logic zero on one of the inputs), their outputs contain logical zeros, .a at the output of the element OR NOT 10 is a logical unit that permits the passage through the element AND 11 pulses from the generator of pulses to the inputs of the counter 2 horizontal scan, the imager 6 video impulse, the element AND 1 The device operates in normal television mode. Frequency: 1 pulses master oscillator is oriented on the television sweep speed (approximately 10 MHz). It is with this frequency that the counter 2 horizontal sweep is recalculated. The full cycle of the calculation of the horizontal scan counter 2 corresponds to the addition of one in the vertical scan counter 3. The full cycle of the calculation of the counter 3 is carried out during the time of one frame. With a certain degree of coherence with respect to the input pulses of counter 2, the memory block k is accessed - AND to the character generator 5. The multiplicity of a call is determined by how many electronic raster points one acquaintance takes (symbol and pause between characters). The address of access to memory block k per frame of information is determined with the state of counters 2 and 3, and the address of access to character generator 5 is determined by the character code read from the memory block and the number of the current television line, which is determined by the state of vertical counter 3. At a frequency corresponding to the frequency of accessing the character generator 5, the character configuration code is recorded in the video pulse shaper 6. Functionally, the shaper 6 is a shift register with the Zanesen chains (coming from the character generator 5) and a shift chain connected to the output of the element 11. The shift frequency corresponds to the frequency r. pulse generator (MHz), which provides the illumination of elements (points) of the television line in accordance with the information content of the block 4 of memory. Synchronizing line and frame pulses to a television receiver are generated in accordance with the state of counters 2 and 3 based on an analysis of output buses 12 and 13. Thus, in the no-record mode, the additionally introduced elements of the display device are practically disabled. The no recording mode is the main and only one when connected to a television indicator device. When a logical unit signal is applied to the input bus 16, the device switches to the image recording mode on the matrix AC discharge panel. The signal to bus 16 is supplied simultaneously with the start of the next frame and is taken at its end. tsu. Until such time as at the output of the video signal generator 6 there is a logical zero signal, there is no trigger pulse at the input of the one-shot 8 and the device operates according to the algorithm described above. The frequency of search of non-illuminated points corresponds to the frequency of sync generator 1 (approximately 10 MHz). The appearance of the first highlighted point (logical unit) at the output of the video pulse generator 6 will cause a coincidence with a second pulse at the nef) BOM input element I 7, the appearance of a pulse at the input one-shot 8 and its launch. At the output of the one-shot 8, a pulse of positive polarity is formed. A second single vibrator 9 is triggered from the back edge of the pulse from the first one vibrator. Hci. An output of the element OR-HE 10 is formed. A negative polarity pulse is formed equal to the total duration of the positive pulses from the single vibrators 8 and 9 (about 20 microseconds). Each of the one-shot generates a pulse equal in duration to approximately half of the total (from the element OR NOT 10). The need for two mono-vibrators and an OR-NOT element is determined by the fact that the launch of the first one-vibrator with several illuminated points will occur every 20 MCS, during which each of the single-vibrators is about half the time excited and the second half is restored. In this way, the normal conditions for the functioning of each single vibrator are ensured. A long negative pulse (20 µs) from the output of the element OR NOT 10 prohibits the corresponding time of passage of pulses from the generator of 1 pulses through the element 11 to the sweep counters and the driver 6 of the video pulse. The horizontal scan counters 2 and vertical 3 remain in ({μksirovanny state at all times (20 µs), and on the output bus 17. Negative signal Record all this time is logical zero. Thus, all conditions are created. To record a point on the screen of the matrix indicator. Termination of recording will occur after the termination of the excitation of rdnomibrators, when the signal of a logical unit is set at the output of the OR-NOT 10 element. This will allow the progression of the next impulse from the generator 1 through the AND 11 element to the counters their state is at 1) and the video pulse shaper 6 (which will cause the next raster point at the output of shaper 6.) If the next point is illuminated, then the one-shot cycle described above repeats. In the case of non-illuminated points, the device works without additional elements cycle duration equal to the pulse period from the pulse generator 1. Thus, in the recording frame, the time spent on the illuminated point is approximately 20 ISS (the minimum allowable time according to the specifications on the matrix indicator), and the time spent on the non-illuminated point is approximately 100 ns {i.e. 200 times less). The total time spent on non-illuminated points is insignificant in the total time frame of the recording. And the time of the recording frame itself takes on values that are quite satisfactory from the point of view of the physiological characteristics of the operator. Compared with the above calculations, the recording frame time decreases in the worst case (full filling of the screen with symbols) by a factor, and if the screen is incompletely filled, the speed increase is also expressed more significant numbers. 8: 3 The proposed device for displaying information, built on the basis of the raster sweep method, can significantly improve the speed when writing to the screen of a matrix gas-discharge indicator and achieve satisfying values of almost any operator. In addition, an expansion in the field of application of the device is achieved, consisting in the possibility of connecting as an indicator in the information display system both a matrix gas discharge device and a simple television indicator. It is possible to work with both types of indicators in parallel (in this case, the display on the television indicator will be briefly interrupted for a while: updating information in the memory - when editing and from the keyboard or sharing with a communication line). The invention The device for displaying information, containing a pulse generator, sequentially connected horizontal and vertical scan counters, the outputs of which are the first and second outputs of the device, a memory block whose first input is sent as the first input of the device and the output is connected to the first input. a generator, the second and third inputs of the Pamdti block and the character generator are connected to the outputs of horizontal and vertical scan counters and. FO (video pulse importer, whose input is connected to the output of a character generator, which is so that, in order to increase the speed and expansion of the area, application, device by providing a display like on a matrix gas discharge, and on the television indicators, the first and second elements AND the first and second one-shot and the element OR NOT are entered into it, the output of which is the third output of the device and connected to the first input of the first element AND, the second input of which is connected to the output of the pulse generator , the output of the first element. And connected to the input of the horizontal scan counter, the second input of the driver of video pulses and the first input of the second element, and And, the second input of which

Claims (1)

Claim A device for displaying information containing a pulse generator, series-connected horizontal and vertical counters, the outputs of which are the first and second outputs of the device, a memory unit, the first input of which is the first input of the device, and the output is connected to the first input of the character generator, second and third inputs the memory unit and the character generator connected to the outputs of the counters horizontal and vertical scan and the shaper of the video pulses, the input of which is connected to the output of the character generator, On the one hand, in order to increase the speed and expand the scope of the device by providing display both on the matrix gas discharge and on television indicators, the first and second elements And, the first, are introduced into it and the second one-shot and the OR-NOT element, the output of which is the third output of the device and connected to the first input of the first AND element, the second input of which is connected to the output of the pulse generator, the output of the first element. And connected to the horizontal counter input, the second the course of the video pulse shaper and the first input of the second AND element, the second input of which 963083 10 is the fourth output of the device. connected to the output of the video driver, the third input is the second input of the device, the output of the second AND element is connected to the input of the first one-shot, the output of which is connected to the input of the second one-shot and the first input of the OR-HE element, the second input of which is connected to the output of the second one-shot, the output of the driver video pulses