SU981986A1 - Device for displaying data on crt screens - Google Patents

Description

(54) DEVICE FOR DISPLAYING INFORMATION ON CRT SCREENS

I v:

The invention relates to computing, in particular, information display devices on a CRT, and is intended to display information of different content simultaneously on multiple screens. In information processing systems, the need arises for a single operator to work with multiple screens, information of different content is displayed on KOTopttJx. In addition, there is a widespread use of a device for displaying group information, and the active influence on the content of information on screens (a request for a specific object, area, editing) must be centralized from a single console.

A device for displaying information on CRT screens is known, which contains a CRT, a RAM memory, a ROM character generator, a control unit, an interface unit, a console. The CRTs are combined into a multi-screen device (system) for displaying information via interface cards, with the help of which the information intended for display 1 is programmatically distributed with a digital computer.

Such devices have a large hardware redundancy, since identical blocks are repeated in each VCU display channel: interface unit, ROM character generator / control unit (in some - the console), besides, in standalone mode, the work with information displayed by specific VKU, it is charred by commands only programmatically with a digital computer (for example, the recording of information displayed on a VCU-1 in the Pagadt VKU-2

15 moving the marker from VCU-1 to VCU-2, etc.), which increases the cost of operating time of the digital computer processor and the operator's waiting time when responding to a request for information due to priority

20 of the queue created by the interns on the digital computer channels, and it requires dipping the number of external digital computers.

The closest in technical essence to the invention is a device for displaying information on CRT screens, containing n + 1 auxiliary units of the same type for storing images connected via switches with receiving display elements, as well as a control unit ensuring recording of the image into a free storage unit, Each of the n receiving display elements has its own image forming channel (memorization block character generator, video block - CRT), information in which comes through the switch yuchateli. The peculiarity of this device is that the information received from the digital computer for display on this CRT is stored in a separate memory block and the signals intended for display are forged in a separate channel, i.e., in parallel and independently on any of the screens, information is displayed recorded in memory blocks (RAM) 2. A disadvantage of the known device is that the image forming device (character generator) is repeated as many times as there are display channels (CRT) and switching is performed Formations from image storage units to receiving elements. This introduces hardware redundancy into the device. The technical reason for the lack of using several identical image forging devices is that the information received from the storage unit (RAM) is fed directly to. the input of the forming device (character generator), and from it enters the CRT, and the forming device at a particular point in time forms only one alphabet character intended for display. The purpose of the invention is to simplify the device. The goal is achieved by the fact that a device for displaying information on CRT screens, contains a code distributor, the outputs of which are connected to the information inputs of the memory blocks, the control inputs of which are connected to the first output of the synchronizer and the character generator, the inputs of which are connected to the third and third outputs of the synchronizer The fourth and fifth outputs of the synchronizer are connected to the deflection of CRT systems, the elements of which OR are connected to the modules of the corresponding CRT, the elements of Both the decoders, the inputs of the decoders are connected to the outputs of the respective memory blocks, and the outputs from one of the inputs of the corresponding blocks of elements and the other inputs of which are connected to the outputs of the character generator, and the outputs of the blocks of elements AND to the inputs of the corresponding elements OR, and the fact that the synchronizer contains a pulse generator, and serially connected counter elements of the character, row counter and frame counter, the output of the pulse generator is connected to the input of the counter of the elements of the sign, the first and second outputs which are, respectively, the first and second outputs of the synchronizer, the first and second outputs of the row counter and the output of the frame counter are the third, fourth and fifth 1 1 outputs of the synchronizer, respectively. FIG. 1 is a block diagram of a device for displaying information on CRT screens; in fig. 2 and 3 are examples of the generation of characters by a character generator. The device contains a code 1 distributor, blocks 2 synchronizer 3, deflecting systems CRT 4, CRT 5, decoders b, blocks of elements AND 7, character generator 8, elements OR 9, pulse generator 10, the counter of the elements of the sign 11, line counter 12, frame counter 13. The device operates as follows. At the time of the distributor of codes 1, the codes of the characters intended for display are received, and in accordance with the CRT addresses and places of display of the characters are recorded through the information inputs in each of the blocks; memory 2 synchronously with the scanning of the image on the CRT 5. The operation of the device is synchronized by the synchronizer 3. The pulses from the first output of the counter of the elements of the sign 11 are fed to the control inputs of the memory blocks 2. These pulses, the duration of which is equal to the duration of the familiarity sync signals, are transmitted of the next code of the displayed character to the decoders 6 synchronously with the scanning of the image of the CRT 5, formed by the deflecting systems of the CRT 4. The decoders b have a number of outputs K equal to the number of characters of the alphabet one received in the device. The CC block of elements And 7, which has one common output, consists of K two-input elements I, to one of the inputs of which 1, 2 ... K signals of decoders b are fed, and to other inputs 1, 2, ... K signal from the character generator 8. At the outputs of the character generator 8, each of which corresponds to the alphabet letter and the number which equals the number of alphabet characters, the backlight pulse sequences are generated corresponding to the bit-wise image of the sign in the CRT screen. As an example in FIG. 2 and FIG. 3 shows the sforletted alphabet signs on two CRT screens.

The formation of these signs is as follows.

Each sign is formed in a familiarity - a matrix formed by eight elements horizontally and eight lines vertically. FIG. 2 and 5 of FIG. 3 marks the coordinates of the elements and lines in the code corresponding to the state of the counters-I and 12. / Vreg4 of formation 8. elements horizontally in the formation of 10

c with code 000 is equal to the time of submission of the code of the displayed sign-C of memory block 2 to the inputs of the corresponding decoder 6 or the duration of the olino signal corresponding to the sTO-ts code and coming from the outputs of the indicators b to one of the inputs of the corresponding block of elements And 7, to the other inputs of which are supplied with signals formed by a generator of 20 characters B, one connection each corresponding to the displayed ground.

At the time of forming the next lines with the codes 001, 010, ... 111, the transmission of the code of this character from memory block 2 is repeated by a signal from counter I, and from generator 8 signals are received that are sequences of light pulses generated for each .f | from the following lines.

Thus, from the outputs of the And 7 blocks, via the OR 9 elements, the inputs of the CRT 5 receive signals of the illumination for the Kth sign, selected from K groups of signal sequences, each of which is formed independently of the input code of the sign and corresponds to this sign the alphabet, and the selection of the signals of the illumination functions is made by the signal 40 from the decoder, corresponding to the code of the K-th character. The device is at the stage of manufacturing a prototype and developed on an integrated circuit 45 integration. As a character generator, a reprogrammed ROM is taken in a 512 8-bit ROM format, which is used to form an image on 4 CRTs. JQ In this way, each CRT 5 has an independent channel for forming characters, thanks to the device, it allows you to display independent and different content information all at once on all CRTs when the device is improved and its reliability is improved compared to the prototype.

The device allows for an increase in the number of CRTs, with this, the same character generator is used and only a memory block, a decoder, a block of AND elements are added. element OR and CRT. .

The character generator can be made arbitrarily versatile, having 65

981986

mean more alphabet characters. In addition, it is possible to control through the distributor of codes 1 from one workplace (console) all the display channels. Due to the tight synchronization of the operation of the mouth1; It is technically not difficult to implement the device control mode, for example, switching the pointer (marker) from screen to screen, marking a zone on any screen, etc. for all the time display channels, they are equally equal to the single synchronization grid and independent of the process of forming the alphabet of characters. This extends the functionality of the device.

Claims (2)

1. A device for displaying information on CRT screens, containing a code distributor, the outputs of which are connected to informational inputs of power units, the control inputs of which are connected to the first output of the synchronizer, and a generator zngisov. The inputs are connected to the BToiMdM and the third outputs of the synchronizer, the fourth and fifth outputs of the synchronizer are connected to the diverting CHCTehKiM CRTs, so that, in order to simplify the device, it contains the elements of the SHS, the outputs of which are connected to the modulators of the corresponding The CRTs, Andy dan blocks and decoders, the deshfrator inputs are connected to the outputs of the respective memory blocks, and the outputs are connected to one of the inputs of the corresponding And blocks of elements, the other inputs of which are connected to the outputs of the character generator, and the outputs of the And in the elements - to the inputs of the corresponding element or. 2. The device for Ti, about tl, which means that the synchronizer contains a pulse generator, and a serially connected counter of the sign elelects, a row counter and a frame counter, with the generator output: the Torah of the pulses is connected to the input of the counter of the sign elets, the first and outputs which are, respectively, the first and second outputs of the synphonizer, the first and second outputs of the row counter and the output of the frame counter are respectively the third, fourth and fifth outputs of the synchronizer. Sources of information taken into account in the examination 1. For the UK 1470422, cl. G 4 A, 1975. 2. For France of France 2264326, cl. G About K 15/20, 1975 (prototype).