DE1961266A1 - Graphic display system - Google Patents

Description

Patent attorneys Dipl.-Ing. F. Weickmann,

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr

. K. FlNCKE

Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

XI

8 MUNICH 86, DEN

PO Box 860 820

MÖHLSTRASSE 22, CALL NUMBER 48 3921/22

TEKTRONIX INC.

14150 Southwest Karl Braun Drive,

Beaverton, Oregon, 1st St. A.

Graphic display system

Digital computers generate and process a large number of data, which are often available to the user in graphical form Recordings are visible, e.g. as characters, curve drawings or the like .. A successfully applied principle to display graphical information makes use of the specification of step-by-step recording commands to a mechanical one Writing implement capable of moving in defined steps along two orthogonal axes is. For each step movement, a command also causes a pen to write on a writing surface executes or not. The inertia of mechanical recording devices, however, limits the walking speed to about 400 steps per second and the rate at which the pen state changes to about ten changes per second. Often the character information is stored on a magnetic tape in a computer. The magnetic tape "is sold in

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wisely reproduced at a data frequency compatible with the mechanical drawing device. These Playback frequency is very slow compared to the speed at which the computer is able to work.

Cathode ray tubes, on the other hand, can do a lot to work faster, which is why for the purpose of recording digital computer output signals step-by-step already with Advantageously, a bistable storage tube that enables direct viewing has been used. Such a tube " shows information supplied to it for an almost infinite amount of time. The modern storage tube development shows that Dot writing speeds of four microseconds in Area of the possible. A storage tube works with a total writing frequency of 250,000 characters per second far more than a thousand times faster than a mechanical recorder. However, the storage tube does not deliver so simply a Pestkopda of the desired recording. Further is hard copy recording when using a mechanical drawing device much larger than the display screen of a storage cathode ray tube. Thus both own Types of output devices so their advantages. These facilities can also be used together, to "look ahead" to one or more recordings before slowly sending the same information to one mechanical drawing device is delivered.

Cathode ray tubes and even storage cathode ray tubes have heretofore been used to provide a graphic Display of a computer_information to be delivered. The so far however, known systems are often not flexible enough to display a particular record from a select a large number of recorded data and

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to undertake. For example, you may want to add a small Part of a number of available incremental record commands to be carried out, namely for an enlarged display of part of the information available.

The invention is now based on the object to provide an improved graphic display system that the Allows you to enlarge or reduce the display scale to provide an enlarged or reduced drawing. Furthermore, the enlarged display should allow a part of the input data to be shown during an overlap or Multiple mapping of such input data is prevented. The new graphic display system to be created should be above also allow a certain part or area of a previous display to be displayed in a correspondingly selected size. The position and the enlargement of the area should be selectable by means of an adjustable pointer. The pointer should be provided with a write-through frame for selecting the size of the drawing area. The new to be created The graphic display system is also intended to make it possible to apply a gum lens effect in order to successively enlarge it to allow selectable display parts, and finally, an improved digital servo mechanism should be provided.

The object indicated above is achieved with the aid of a graphic display system which, according to the invention, thereby characterized in that a zexchen device is provided which receives digital input data and the output signals to display storage means for executing displays in accordance with the input digital data outputs that a pointer device is provided which supplies a pointer display related to the respective display and contains the facilities, which the size and location information allow the pointer display to set, and that

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Facilities are provided which display a new display to be stored as a function of the size and position information mentioned the display to be newly stored is the area selected by the pointer display of the previous display.

The graphic display system according to the invention includes a counter which successively successive character input signals summed up to a value which is characteristic of the respectively desired deflection in an analog display device. The analog display device is coupled to the counter via a digital-to-analog converter, and Furthermore, devices are provided which allow the connection of the digital-to-analog converter to the counter stages to be changed. The area becomes analog display expands, and setting in the opposite direction increases the range of Analog display compressed.

The output signals are used to create a write-through pointer of a signal or clock generator is counted by the aforesaid counter, and a count compared to a shift register. Of the Signal or clock generator is operated continuously until the counter setting in the shift register with a preselected Shift matches. A copy frame is in analog form of the display device together with the Pointer fed.

To achieve a subsequent display, which is determined by the pointer and the * frame, a puncture is fed to the complementary value of the content of the shift register to the counter ₉ together with the repeated

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successive character input signals. The following illustration then leads to an enlargement according to a selectable image size. Through successive Records during a gradual downsizing of the drawing scale, a rubber lens effect can be achieved in this way.

The analog display device is preferably a bistable storage tube which is a drawing almost infinitely long retains. The drawing in question is deleted by displaying a subsequent drawing that has a different scale owns, i.e. before the display of a subsequent larger drawing.

The invention is explained in more detail below with reference to drawings.

1 shows a simplified block diagram of a device according to the invention Circuit.

IPig. 2 shows a front view of two cathode ray tube displays; with clarification of the operation according to the invention to illustrate drawing details. 3 illustrates a preload operation using a line scale according to the invention.

Figure 4 shows two cathode ray tube displays for clarity a gum lens effect occurring in accordance with the invention.

Figure 5 shows two further cathode ray tube displays to further illustrate the gum lens effect of the invention.

Figure 6 shows an overall block diagram of the invention Circuit arrangement.

7 shows a block diagram of an up-down counter according to the invention.

fig. 8 shows a circuit diagram of a switch matrix according to FIG the invention·

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9 schematically shows a digital-to-analog converter. Fig. 10 shows a circuit diagram of scale switches used in accordance with the invention.

11 shows a circuit diagram of a comparator circuit according to the invention.

Fig. 12 shows a table of values for the operation of a comparator circuit, of Fig. 11 shows a part. 13 shows a circuit diagram of a device according to the invention Z-axis locking circuit.

14 shows a circuit diagram of a frame generator according to the invention.

15 shows a first possible position in a diagram a frame relating to a display on a cathode ray tube.

16 shows a diagram of a second possible position of a frame in relation to a cathode ray tube display according to the invention.

In Fig. 1, in a simplified block diagram, is graphic display system according to the invention shown in more detail. This display system includes a computer 10, the digital step-by-step successive character input signals for the step-by-step movement of a character device in emits two orthogonal directions. For the sake of simplicity of explanation, only one such direction is described below considered closer. It should be noted, however, that largely the same explanation with respect to the other orthogonal Axis would be given. The character input signals typically comprise a series of pulses which, when applied to a mechanical drawing device the drawing mechanism, gradually moving in a certain direction. Of the with .12 designated output of the computer leads to a forward s-backward binary counter 14 out. This counter is how indicated, able to correspond to one of the calculator him

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supplied signal to count in one direction. Of the Computer also emits an output signal via the line to a summing point 18, which is the Z-axis of a bistable Storage cathode ray tube controls.

When output signals appear on the line 12 from the computer, the up-down counter 14 performs a Summing up, numerically characteristic of the deflection in a particular axis, such as the X-axis and for the respective advertisement is desired. The outputs 20 of the up / down counter are bit positions of the counter assigned with increasing value. The relevant outputs are connected to a digital-to-analog converter via switching devices 22 24 connected. The setting of the switching device 22 is determined by the respective display scale associated locking devices 26 controlled which can be selected with the aid of pushbutton switches 28. The switching device 22 also includes connections 30 to the right side of the up / down counter 14. About these connections 30 become the bit stages of the up counter 14 of the highest order is connected to the Z-axis control circuit 32.

The switching device 22 connects with its actuation the ten inputs of the digital-to-analog converter 24 with ten selected outputs of the up / down counter 14. All inputs of the digital-to-analog converter 24 are changed at the same time, so that to switch to a first direction all input signals for the digital-to-analog converter of the successive bit positions or bit levels of the up / down counter of the lower Valence are delivered while moving the switching device 22 in the opposite direction the inputs of the digital-to-analog converter to the aufeinaic -? - *

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following bit positions or bit levels of the up / down counter of higher value can be connected. At the same time, the connections 30 are with connected to the most significant bit positions or bit levels, the / a certain switching position no input signals for the digital-to-analog converter 24 deliver.

The digital-to-analog converter sets the binary digital information into an analog voltage, which is fed to the summing point 34 of the deflection device of the storage cathode ray tube 36 will. This deflection device can be, for example, the X-deflection device. If the switch 22 is moved, so are the ten inputs of the digital-to-analog converter shifted to the more significant bit positions. The effect of this measure is that of the digital-to-analog converter condensed information is supplied. This means that the counter is only set through the higher-value part movement of the analog display device. If the switch is in a lower position, so the relative display value (of each bit is less. However, if the switching device 22 is in the opposite direction moves, with the result that bit positions having a lower significance with the inputs of the digital-to-analog converter are connected, the lower-valued parts of the count result a stronger influence on the digital-to-analog converter. As a result of this measure, an expanded or enlarged display on the storage cathode ray tube 36 results.

For the up-down counter 14, a counter is assumed as an example, which has a counting capacity of 8192 Sdiritt input signals, which are counted in binary form. This means that the counter 14 has thirteen counter stages. The ten inputs of the digital-to-analog converter show it to _e that this converter is capable of only 1024 analogue

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Generate level. As long as the up-down counter does not exceed 1024 in its counter position, the digital-to-analog converter records this information. In this way, a true-to-scale representation of characters takes place on the cathode ray tube 36. If the switching device 22 is off the position shown moved to the right, so that the terminal 38 to the output terminal 40 of the up-down counter has been carried out, the counter position 8192 of the counter is compressed into the 1024 levels of the digital-to-analog converter. If, on the other hand, the switching device 22 is moved to the left, so that the connection 38 to the output terminal 42 of the up-down counter is connected, the counter position 256 of the counter is the same Analog range expanded from 1024 levels in the digital-to-analog converter. It should be noted that in the last mentioned Position the two left inputs of the digital-to-analog converter not directly with the up-down counter are connected. However, the information recorded is the detailed information as it is available from the computer and which allows the digital-to-analog converter to generate a sufficient number of level values to be displayed on the storage cathode ray tube 36 to obtain a reasonably detailed record.

Is the digital-to-analog converter 24 with the up-down counter 14 connected in the position shown in the drawing, i.e. with the ten counter steps of low significance or with counter stages whose counting capacity is shortly before the maximum counting capacity of the counter, and the up-down counter has a larger number of input steps If signals are recorded as being recordable by these counter stages, then those fed to the digital-to-analog converter 24 lead digital input signals a repetition, with the result, that there is a "wrap" in the display. For this The reason is via the connections 30 of the switching device 22

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the Z-axis locking circuit 32 is actuated in such a way that "that the storage cathode ray tube 36 only points to the ten bit positions of the lesser significance of the up-down counter responds, which are selected with the aid of the switching device 22. For higher counts is the cathode ray the cathode ray tube 36 blocked, even if the bit positions still have a lower significance Contain information.

Thus, in the present case, by actuating the switching device 22 an enlargement or reduction in size via scale switches 28 and locking devices 26 the respective character representation achieved. In between scale changes, the storage cathode ray tube should be to be deleted. In this case, a new recording of the digital step deflection commands is requested from the computer, The result of this measure is illustrated in FIG. For the first ad indicated on the left is the Switching device 22 has been set in a first position. The switching device is for the second display shown on the right 22 has been set to a second position (another shift has taken place). The left character representation e.g. illustrates a curve in an X-Y coordinate field. As explained in more detail below a section has been selected from this curve been. The size of the new record is selected by the scale switches 28. Will the information from recorded again by the computer, the curve shown, as can be seen in the right-hand part of FIG reproduce, on a larger scale, a portion of the curve that may be of particular interest.

In the system according to the invention, there are therefore two types of operation possible, namely a drawing operation, in the meantime a specific representation on a memory

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Cathode ray tube is written and stored, and a "frame" operation in which the on the display screen the cathode ray tube stored and visible information is overlaid by a "write through" pointer frame. This frame is adjustable and resizable, for the purpose of selecting a part of the saved ones Record for re-recording on the storage cathode ray tube display screen. In the inventive System will determine this "standing by" mode instead of the aforementioned recording mode. In this ready mode, the computer is informed that it has received the digital step information can submit to the system according to the invention for executing a drawing. Triggering the delivery of this information generally from the computer or from a computer control or connection circuit. In the "frame" mode, the system according to the invention reports to the computer that it is occupied and that no further step character information should be sent out.

The area of interest that may be of interest in a display is selected by "shifting" to the "frame" mode. In this way, information is provided in the form of a drawing on the display surface of the storage cathode ray tube 36, and a pointer with a frame adhering to it is "written through" the stored display. Returning to Figure 2, it should be noted that with respect to the display on the cathode ray tube, a frame 4-4 is slidable to select the particular area of interest. The location of the pointer is considered to be in the lower left corner of frame 44; the position of the pointer in relation to this lower left corner of the representation on the cathode ray tube is called the displacement. This shift is selected with the help of a large number of shift switchesa 46 « * - \ χ &

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they are indicated in FIG. 1. In the frame mode, no step input signals are grounded on line 12 fed to the up-down counter 14. A signal or clock generator 48 gives, however, one after the other Pulses to the up-down counter, for the purpose of bringing the pointer into the desired position. The clock generator sets the delivery of pulses to the up-down counter 14 and via a divider 52 to a shift counter or to a shift register 50, until a comparator 54 indicates that the setting of the Shift register 50 the setting of the shift switch 46 has reached. At this point in time, the counter position in the up-down counter 14 corresponds setting the frame 44 (in Fig. 2) at the desired location. The frame itself is created with the help of a frame generator 56 generated in analog form. The output signal the frame generator 56 is fed to the summing point 34, in connection with the output signals of the digital-to-analog converter 24. The system comprising comparator 54, shift register 50 and clock generator 48 can can be regarded as a digital servomechanism in which the comparator 5 ^ is an error detector between the shift register and the shift switches. This servomechanism gives a certain Number of clock pulses until the setting of the shift register is the same as the setting of the Shift switch. The number of clock pulses input to the up-down counter 14 differs from the number of clock pulses entered in the shift register 50 by the reduction ratio of the divider 52. The reason for using the divider 52 is understandable in connection with the "rubber lens" mode of operation, which will be discussed in more detail below will.

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The counting result in the shift register " is characteristic of the position of the frame 44, e.g. in Fig. 2. To achieve the in the right part of Fig. 2 displayed curve is the storage cathode ray tube will be erased and the information in the form of step pulses to make the drawing will be renewed recorded with the help of the counter 14 from the computer. First, however, the complement (plus one) becomes the number in the shift register in the up-down counter 14 added. This results in the information being removed from the desired part of the previous display is selected to be displayed in the new display on the cathode ray tube. In the following, let the lines— 3 considered in more detail. As already stated, counting results in the up / down counter have the effect of via the from the digital-to-analog converter 24 recordable count volume, a suppression of the electron beam in the storage cathode ray tube, by appropriately controlling the Z-axis locking circuit 32. The selection of a desired range takes place in that the up-down counter is on the complement value of the content of the shift register increased by one is biased.

In the following it is assumed that the digital-to-analog converter is connected via the switching device 22 to the nine low-order bit positions of the up-down counter 14. This generates 512 analog level values. Each part of the large drawing comprising 512 successive steps leads to the generation of analog deflection voltages over the entire screen surface of the cathode ray tube.In order to avoid multiple exposures, the connections 30 block the Z-axis of the cathode ray tube, for all bits except for least significant 512 bits. In Fig.

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the 8192 counter positions of the 13-bit register are what • plotted roughly to scale along a line, the length of which is denoted by 8K. The area of interest can be anywhere in that range of 8192 counter readings lie, e.g. between 5737 and 6239 between these counter positions there is a difference of 512. If that were the situation this area is shifted in such a way that it is in the area of the 512 counter positions with the lowest significance If this were true, this area would be displayed on the cathode ray tube. This shift is done by 'the

»Mentioned preloading of the up / down counter, with the complementary value increased by one in the shift register 50 located number. If, for example, the counter is preloaded with 2455, i.e. this counter is preset to 2455, so 5737 would be added to the counter position 2455 which is the counting result required to reach the area of interest. In order to one would get to 2455 + 5737 = 8192. That would be the area of interest in the 512 bit positions lower Skip the value of the counter 14, which would result in a display as shown in the right-hand part of FIG is.

w with reference to Figures 4 and 5 will be explained hereinafter, the "rubber lens" action of the system according to the invention. Fig. 4 shows a representation on a cathode ray tube. This illustration shows the outline of a Christmas tree. It is assumed that the slide switches 46 (in the X-axis and a corresponding switch set for the Y-axis) are set so that the frame in FIG. 4 is arranged around the top of the Christmas tree. A renewed recording of the information corresponding to the right image in FIG. 4 leads to a display of the information previously surrounded by the frame. It is now assumed that a further expansion of the re-recorded

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th information is desired, as Fig. 5 illustrates. Now frame 4-4- is adjusted so that it coincides with the star at the top of the Christmas tree. This information is used to achieve an enlarged view corresponding to the right picture in Fig. 5 recorded again. This rubber lens effect enables thus a rough selection of a particular part of the compressed record and then a subsequent one Magnification until the particular detail of particular interest is displayed on the cathode ray tube.

Returning to FIG. 1, it is assumed that information for the recording of the image shown in the left image of FIG. 4 in the up / down counter 14-entered and shown on storage cathode ray tube 36. The shift switches 4-6 are set so that until the frame 4-4- coincides with the top of the Christmas tree. In a corresponding way, the scale switches 28 are set until the frame 4-4- has a size where it surrounds the area to be re-recorded. Consequently is the position of the frame 4-4 in Fig. 4- by the shift switch 4-6 and the size of this frame selected by the scale switch 28 so that this frame is the one of interest Area surrounds. The now selected scale is usually smaller than the one for the originally selected drawing chosen scale, although this is not necessary. The size of the frame 44, such as that shown in Fig. 2, becomes determined at this time by the frame generator 56, the Signal sequences of variable size to represent a write-through frame of variable dimensions. The frame analog output of frame generator 56 is controlled by the comparator circuit 58. This comparator circuit compares the setting of the scale switch 28 as it applies to the present scale belonging locking devices 26 is transferred, mi.

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the setting at the time when the entire Christmas tree according to Pig. 4 was recorded as this is stored in the locking devices 60 associated with the last scale. Is the difference in standards so large that the frame is one eighth as large as the overall drawing, the frame generator 56 is accordingly controlled.

The locking devices 60, which hold the respective last scale, control the divider 52, which reduces the clock pulses to be fed to the shift register 50. The shift register 50 keeps the accumulated content until the comparator 5 ^ indicates that this content corresponds to the setting of the shift switches 4-6. The supply down counter 14, however, takes on a larger number of counting signals or pulses. The counter 14 receives such a number of counting pulses with the aid of which the pointer frame is shifted in a suitable manner in relation to the previous display, ie in relation to the representation of the entire Christmas tree in the left image according to I ¹ Ig. 4. The locking devices 60 holding the last scale control the divider 52 for the purpose of effecting an appropriate movement of the pointer frame with the displacement of the slide switches 46. In this context it is assumed as an example that each fine setting of the shift switches 46 corresponds to a counter position of 52 of 8192 counter positions. If the previous display, the display of the entire Christmas tree, was an 8K display, ie a display during which the switching device 22 was set in such a way that the contact 38 was connected to the terminal 40 of the up / down counter, then each needs Fine adjustment of the shift switch 46 to readjust the pointer frame by a size which is "equal to 1 / 256th of the display. If the switching device has been moved one bit position to the left, the

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Pointer setting size for fine-tuning the Shift switch 46 equals 1/128 of the display. The reduction of the introduced in the shift register Counting pulse maintains the correct proportions so that the frame makes appropriate movement like this by the locking devices 60 associated with the previous scale with respect to the previously selected one Save the display. Now is the drawing in the right picture according to Pig. 4 is desired, the character step information received again by the computer 10. The complement value increased by one is derived from the Shift register entered into up-down counter 14. It then shows that the new drawing process refers to the previous drawing, in such a way that one after the other corresponding options are given and corresponding magnifications can be achieved.

In Fig. 5 this is the illustration in the left picture the same as that in the right picture of FIG. 4. The shift switches 46 and the scale switches 28 are included ao set that the frame 44 is now about the desired Area extends. Here, too, the frame size is determined by the frame generator 56, which is determined by comparison the content of the locking devices storing the current scale and the content of the last one used scale associated locking devices is controlled. The comparison takes place in the comparator circuit 58. The setting from the shifting of the frame is also made here by the fact that a corresponding series output signal from the clock generator 58 into the up-down counter is entered, namely such a number of output pulses, until the shift register with its content the setting of the shift switch 46 corresponds.

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Here, too, the shift register is controlled in a suitable manner by the locking devices storing the last used hatred rod via the divider 52. The complementary value, increased by one, of the number stored in the shift register is now entered in the up / down counter, and the information given by the computer 10 is recorded again. Thereby the in the right picture of S ¹ Ig. 5 delivered display.

In Fig. 6 is a detailed circuit diagram of the erfindungsfe according to the graphic display system. Corresponding elements are identified by corresponding reference symbols designated. The provided computer connection device 11 is of the type that is used in the usual way to to connect the mechanical X-Y drawing devices, etc., to computers. However, this connection device preferably has a higher operating speed in order to adapt to to achieve the higher drawing speed of the cathode ray tube electron beam. Bex the depicted Embodiment of the invention is a point display. used, in which the computer output signal the step direction of movement of the respective point. It is also determined whether a point is at the relevant step ". is to be attached or not. For example, at the with I», P and R designated X-axis outputs of the computer connection device occurring signals determine whether the point position step takes place to the left or to the right. The step command occurs at P. on. Signals occur at the outputs labeled Raise pen and Lower pen. whether or not to write a period when the other commands are recorded. Thus becomes a point write command output when signals appear at outputs P and L or R. The thing about the pen lift The input signal causes a write flip-flop to be set (not shown) in a write state. In

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Correspondingly, signals appearing at outputs U and D indicate an upward and downward movement, * and the step command in the Y direction occurs ^{at output P 1.} For each step position, the pen raising and lowering the pen normally controls the operation of a pen, in the form of a mechanical drawing implement. In the present circuit, these commands control the Z-axis control circuit 62 in such a way that the Z-amplifier 64 outputs a corresponding voltage to the grid 66 of the cathode ray tube 36. This is used to control the electron write beam when a command relating to pen lowering is received. If a command relating to the lifting of the pen is received, a bias voltage suppressing the electron beam is applied to the grid.

The commands appearing at the outputs U, D and P ¹ , also denoted below with the same reference numerals, are executed in a Y-channel circuit 68 which essentially corresponds to the X-channel circuit shown in more detail here. The only exception to this is the fact that certain elements can be common to both circuits, e.g. the scale switches 28, the locking devices 26 associated with the respective scale, the locking devices 60 associated with the previous scale and of course the storage cathode ray tube 36 and the Z-axis circuit and parts of frame generator 56.

The one occurring at the output P of the computer connection device 11 Command consists of a pulse that is sent via an OR gate 70 the up-down counter 14 is supplied. The commands R and L v / ground to the forward and reverse control circuits in a corresponding manner of the up-down counter 14 is applied. The up / down counter 14 contains one Rfeue

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of flip-flop stages R _x . to R shown. It contains a number of flip-flops 72, each of which has a C input, the activation of which changes the state of the respective flip-flop. Each flip-flop has two outputs Q and Q, the inverse output signal or the complement of the output signal at output Q appearing at output Q. The respective Q output is connected via an AND gate 74 and an OR gate 76 to the C input of the next flip-flop. A forward line 78 is connected to one input of the AND gate 74- which has one input connected to the C input of the same flip-flop stage.

The Q output of the respective flip-flop is via an AND gate. 80 and the OR gate 76 to the C input of the next following Flip-flops 72 connected. The other inputs of the AND gate 80 are connected to a reverse line 82 or connected to the C input of their flip-flop stage. The counter is designed so that each flip-flop when set into a state for outputting an output signal to the Q output 'causes the next flip-flop 72 to change its state changes when the forward line 78 takes a corresponding Control signal leads. In this context, the result is that the counter adds up a binary sum, each successive Flip-flop stage corresponds to a bit position of higher significance in the binary sum. Performs during the Operation of the counter the down line 82 instead of the up line 78 a control signal so that the respective Complement outputs of the flip-flops control the next stage, so the counter works in reverse direction. In in this case a countdown is made. In order to this counter works in one order at a time

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from two directions.

Coming back to JTig. 6 it should be noted that the individual non-inverse outputs of the counter stages R. to R .. are connected to a switching matrix 22 '. The function of this switching matrix 22 'is to allow the digital-to-analog converter 24 to be shifted "along" the up / down counter, depending on the setting of the locking devices 26 associated with the present scale. The locking devices 26 contain each a flip-flop which is normally in the zero state and which can be triggered in the 1 state when a push button switch 28 is operated. The P locking devices 26 are connected to one another in such a way that only one of these circuits is in the "1" state (at any one time). Under the control of the pushbuttons 28, the currently used scale of the display on the storage cathode ray tube 36 is selected via these locking devices. The designations 8K ₁ 4K, 2K ₁ .1K ₁ 500 and 250 denote reduction factors for the display. For a P locking position of 1K _1, ie that the locking device labeled 1K is in the "1" state, no change in scale occurs. The consequence of this is that 1024 counting steps in the up / down counter 14 lead directly to 1024 level values in the digital-to-analog converter 24. This corresponds to the position of the switching device 22 indicated in FIG. 1. However, if the locking device P labeled 4K is in the 1 state, 4096 counting steps in the up / down counter produce the 1024 analog level values. When the 2K locking device P is in the 1 state, 2048 counting steps generate a total of 1024 level values. In the 500 position (or in the 0.5K position) 512 counting steps produce a total of 512 analog level values. However, these 512 analog level values extend over the same voltage range as the 1024 level values. In the position

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(or in the position 0.25K) call 256 counting steps in the counter 14 produces a total of 256 analog level values which likewise extend over the entire voltage range in the digital-to-analog converter 24. The detailed structure of the Switching matrix can be seen from Mg. 8.

As can be seen from Fig. 8, the switching matrix contains a plurality of AND gates which the counter stages R. to R ^ ₇ , the up-down counter with the number 1 to the number 10 associated inputs of the digital-to-analog converter .

Wk Thus, for example, the AND gates 84 to 93 are transferable when the 1K locking device P emits a corresponding traffic jam signal via the line 1K. Due to this control, the counter stages Hy to R ^ _{0 of} the up / down counter can be connected directly to the outputs of the switching matrix associated with the digits 1 to 10. This is the switching matrix position already indicated in FIG. 1. However, if the 8K line carries a corresponding control signal from its associated locking device, then the AND gates 94 to 103 connect the counter stages R ^, to R. ^ of the up-down counter with the inputs of the digits 1 to 10 of the digital Analog converter. The other scale input signals cause

™ in a corresponding manner a shift of the connections of the Digital-to-analog converter "along" the counter steps of the up-down counter .

In the following is the one in ^ 'ig. 9 digital-to-analog converter shown in more detail 24 considered. The inputs associated with the numbers 1 to 10 are each switched so that they control one of the gates 108 to 117. Each of these gates receive respective inputs from current sources 118 to 127- The respective gates act in such a way that they deliver selected currents on the line 130. To this In this way, the input of an operational amplifier 132 is

009847/1538 _BA0 ofnqinal

controls, which is provided with a feedback resistor 134- is. The current sources generate currents corresponding to * the size 1/512, T / 256, etc. and I. If the gate 108 thus driven from the first or the lowest digit of the switching matrix 22 ', see above v / the lowest current 1/512 is delivered to the line 130, The current 1/512 in turn causes a voltage drop dem .- 'ückkopplüngswiderstand 134. The other current sources cause gradually increasing voltage drops and thus larger output signals from the operational amplifier. Will If these currents are added together, they constitute an analog output signal which corresponds to the digital input signal.

Returning to FIG. 6, it should be noted that the output signal of the digital-to-analog converter 24- a summing point 34- is supplied, in conjunction with the output signal of the frame generator 56 · The thus formed Signal v is sent to the horizontal baffles 136 of the storage cathode ray tube 36 supplied. In this connection path there is a horizontal amplifier 138 whose gain is around can be changed by a factor of two. In the recording mode, i.e. then, information is normally sent from the digital-to-analog converter 24 for the purpose of recording character information on the display screen of the storage cathode ray tube is picked up, the gain of amplifier 138 has its normal value, but not twice the value is also adjustable.

The storage tube 36 contains a tubular envelope 140 in which a main electron gun with a cathode 142, a control grid 66 and a focusing and accelerating assembly 144 are housed. The one through the main electron gun The electron beam 146 generated is moved in the horizontal direction with the aid of the horizontal deflection plates 136 and in the vertical direction with the aid of the vertical deflection plates 139 Direction distracted. The electron beam 146 is im

009847/1538

BATH ORIGINAL

generally directed to a storage layer disposed on the inside of the glass face plate 148 of the tube is. This storage layer contains a transparent storage layer electrode 150 via which a light-sensitive, Liches dielectric 152 is deposited, in which it is is expediently a continuous layer of the P-1 phosphor type. Also used as a target electrode The layer electrode 150 to be designated consists of a thin transparent, electrically conductive coating, such as of tin oxide or the like; it is connected to the central tap of a voltage divider, which is connected between a positive Potential leading terminal and earth is switched. Furthermore, this electrode is connected to an extinguishing generator Cancellation circuit 153 connected.

The storage tube 36 is also provided with one or more flood electron guns 154 housed in the tube piston 140 adjacent the ends of the vertical baffles in the vicinity of the target or storage layer 150. The electrons emitted by a flood electron gun diverge in a broad electron beam that is largely evenly distributed towards the dielectric 152. A plurality of electrodes are provided on the inner surface of the bulb 140 behind the flood electron guns. A first electrode 156, which is connected to the center tap of a voltage divider connected between a positive voltage and ground, acts to create a more uniform electric field to direct the electrons. A second addition to the memory layer side end of the tube provided electrode 158 is also connected _nes to the center e \ voltage divider connected between a positive voltage and ground, "H" These electrode 158 to the effect acts "■ Ί l. '. S Eire. £" * seal causes the electrons and collects £ _v gf = "Anass a certain Au secondary electrons.

009847 / 15CO BADOTOiNAL

1361266 24 "

The dielectric 152 includes a phosphor layer that is suitably thin and porous. The purpose of this measure is to remove secondary electrons, which is emitted by electron bombardment of the phosphor side through the phosphor layer and to be collected by the storage layer electrode 150.

During the operation of the? _L eyelets are the tube potentials selected such that the electron beam 146 has a relatively high speed for the execution of a write operation. The electron beam 146 is able to generate secondary electrons when it strikes the storage dielectric 152. The secondary electrons are then taken up in a suitable manner by the storage layer electrode. In this ITaIl, a base area of the storage layer can be positively controlled or "written" on as a result of the emission of the secondary electrons. A written area is maintained at a positive potential after the electron beam 146 has passed over such a base due to the action of the flood electron gun 154-. The flood electron guns 154 generate electrons at a relatively slow rate. These electrons hit the storage layer; however, they are usually insufficiently fast to perform a write operation. When the electrons from the flood electron guns 154

impinge on the areas of the i-storage layer on which a positive charge is not applied, so these flood electrons tend to such areas on the negative potential of the flooding electron guns keep. This is a stable potential level in the memory layer. The electrons of the flood electron gun are, however, attracted by the positive base areas; thus they get a high speed in terms of

BAD ORiGJNAf

009847/1538 ^NAL

1361266 Π

these surfaces, as a result of which they cause continuous secondary ■ emission. This means that these areas are grounded on one positive potential or close to the potential of the storage layer electrode 150 held. This potential represents the represents the second stable potential level of the storage layer. The storage layer thus has bistable properties; it is able to retain information written on it. The flooding electron beam controls the storage layer areas into one of the two stable potential levels, depending on the information obtained with the help of the electron beam 146 is written on these areas. Since the dielectric 152 comprises a phosphor, enables a direct observation of the storage tube in question. A signal sequence or the like. That on the storage tube for display has been brought, can thus be maintained almost indefinitely. The reason for this lies in the memory effect of the flood electron guns. This means that the storage layer needs to be "refreshed" or constantly with one Signal information to be described. The storage tube only needs the desired character display once fed to ground.

An erase signal is used for the purpose of erasing the memory layer output by the erase generator 153. This cancellation signal is applied to the storage layer electrode I50 $ -es contains a positive pulse, which is immediately followed by a negative pulse. The positive part of this signal leads to positive fading of the storage layer. This means that this signal causes the entire memory layer to one to assume the positive state of the secondary emission, which corresponds to the bistable write state of the memory slot; is equivalent to. The negative part of the signal in question leads the entire storage layer into a negative one or one that is not written to State back. "This deletion process is therefore preferred

0 0 9 8 4 7/1538 ^BAD original

because it leads to uniform erasure, consequently the entire storage layer ends up being almost the same Possesses potential. In the system of the present invention, the erase generator 153 is controlled to do the aforementioned Signal for erasing the memory layer representation generated, if desired, a new one by the computer displayed information or if it is desired to display the same information on a different scale. The latter case means a display with a different degree of magnification.

Since the inventive system receives a series of step level values from the digital to analog converter 24, that is Result a point display. A signal sequence, a drawing or the like. Is on the surface of the fluorescent dielectric of the cathode ray tube in the form of a series of dots. Every time the digital-to-analog converter changes to a new level value, a point can be written on the display screen of the cathode ray tube, i.e. on the phosphor dielectric 152. By inclusion of a previous pen lowering signal from the Z-axis control circuit 62 becomes on Input signal delivered to the Z amplifier 64, due to which the electron beam 146 is suitably caused, the storage layer in place of such To bombard the point with electrons. With the digital-to-analog converter 24 a sufficiently high number of level values is generated so that, with the exception of the strongest, enlarged displays the dots are not noticeable, but that an almost continuous line on the cathode ray tube is visible.

A control line 160 represents an input line for the Z-axis control circuit 62. In the relevant

BATH ORIGINAL 009847/1538

1951266

Connection, the AND gate 162 is turned on. The line 160 is connected to the input associated with the first digit of the digital-to-analog converter. Now suppose that a control unit indicating the readiness to

mlt

signal at the A ^ F (ready) designated input of the AND gate 162 occurs. The cathode ray tube then writes a point only when the digital-to-analog converter added first digit or the image of the lowest value changes. This means that the cathode ray tube as long as does not continue to write a point until itself has changed the input information supplied to the digital-to-analog converter from the switching matrix 22. Then the Point housed in a new location. It is not necessary to write down a point again in the same position, since the point is already stored, due to the above-mentioned bistable storage property of the cathode ray tube, and because a new writing of the point can lead to a spreading of the already visible image. The one in Pig. Connection line 160 shown in FIG. 6 may be a connection line having AC coupling elements.

The Z-axis control circuit 62 also takes an input from the Z-axis locking circuit 32 on and on Input signal at an input labeled FF (frame). The signal appearing at the input labeled FF (frame) makes the commands related to the pen lift and pen lowering ineffective, in so far as by this signal the writing process; on the cathode ray tube during the period of time during which a write-through P-frame is generated. The Z-axis locking circuit prevents the generation of multiple images by blocking a write input for all digits with the exception certain low-order digits from the up-down counter '! 4. The Z-Achsra- ^ lock circuit 32 is shown in Fig.13 shown in more detail.

009847/1636 _n

BATH

1961265

According to Fig. 13, the outputs of the counter stages ^ to R-, of the up / down counter is connected to the inputs of AND gates 164, 166, 168, 170 and 172. The AND gate also receive input signal from the Verriepelraigseinrichtungen associated with the respective present scale. These Input signals are characteristic of the scale selected with the scale switch. The AND gate a -500 signal is also supplied, which is characteristic of the fact that the correspondingly designated locking device 26 of the locking devices associated with the present scale is in the "1" state. The 500 signal is inverse or complementary to this signal. Furthermore, the complementary form of the output signal of one of the locking devices associated with the present scale, namely -1K, becomes the inputs of the two AND gates 164 and 166 supplied. The -2K signal is applied to AND gates 164, 166 and 168. The signal becomes -4K the AND gates 164, 166, 168 and 170 supplied. The -8K signal is ultimately fed to all of the AND gates.

To the outputs of AND gates 164, 166, 168, I70 and 172 an AND gate 174 is connected to its inputs. This dJND gate 174 outputs the Z-axis lock signal to the Z-axis control circuit 62 as shown in FIG. 6. It should be noted that each of the gates 164, 166, 168, 170 and 172 as well as the Gate 174 each emits an inverted output signal. Gates 164, 166, 168, I70 and 172 normally control da3 gate 174 in such a way that this gate 174 normally a negative output signal or "O" output signal gives away. This output controls the Z-axis control circuit 62 according to FIG. 6 in normal operation. However, it is one the locking devices associated with the present scale are activated in the "1" state or, for example, in the 2K position, so only the -2K line according to FIG. 13 leads

009847/1538

ITull. Since this line is connected to gates 164, 166 and 168, it is therefore not possible for these three gates to be capable of transmission. Since, however, with the exception of the lines R ^ ₂ ^un ^ ^ z leading to the inputs of the gates 170 and 172, all other lines carry control potential, if one of these outputs from the up / down counter carries a "1" , the output of the gate 170 or the gate 172 decrease, whereby the gate 174 stops emitting an output signal. The output signal of the gate 174 then leads to the blocking of the Z-axis control circuit 62. This prevents the electron beam 146 in the tube 36 from writing a point when a bit in one of the stages R ^ p or R ", des Up / down counter should be available and if the 2K scale is selected. This means that a 2K area which has been selected for writing on the entire display screen of the cathode ray tube is not covered by the writing of other 2K areas of the entire available digital information. Only the digits from the counter levels R ₂ to R ^. control the inputs of the switching matrix 22 '. If the counting position in the up / down counter 14 exceeds a total of 2048 bits, the electron beam is blanked. Thus, only the 2048 low order bits in the up / down counter 14 are effectively used to provide a drawing. If the counter setting in the forward-backward counter 14 exceeds a total of 2048, further information is not taken into account by the computer insofar as a counting result in one of the stages R ^ ₂ or R _x ., The electron beam 146 suppressed. The Z-axis lockout circuit works similarly when other scales are selected. From the counter stages TJ ₂ and R ^ ₁ . Output signals taken from the up / down counter are also used to block the write operation, in particular in the frame mode. Consequently

9647/1538

BATH ORIGINAL

leads each Aufaummierung in the up-down counter over a count of 8192 addition to an output signal from the counter stage R ^ ₁ , and / or R ^ ₁ - * The output signals of the counter stages H ^ ₂ , and TLj- can be here Devices not shown in detail for blocking the frame generator 56 are used.

The control devices associated with the last used scale 60 suitably contain flip-flops and in accordance with the manner in which the locking devices 26 associated with the respective present scale instead however, the reception of a pushbutton input signal removes any of the locking devices associated with the most recently used scale an input signal from the corresponding locking device, which corresponds to the in the present Scale associated locking devices belongs. The locking devices associated with the previously used scale are connected to each other in such a way that only one gets into a certain position. the The locking devices 60 associated with the previously or last used scale do not automatically take the Lar; e of the locking mechanism belonging to the present hatred rod directions 26. The state of the locking devices 60 associated with the last used hate rod changes namely, according to the information from the locking devices 26 associated with the present scale only in response to a corresponding control by means of a command via line 176 from the P or pulse output of the computer connection device 11. On the transmission of the character information from the computer connection device, take the the last used scale, associated locking devices 60 shows the state of the P-scale locking devices 26. Then keep the / last used

00S847 / 1538

Scale associated locking devices 60 this setting during the following movement of the pointer frame or the like. At. A storage register 178 is also connected to the locking device 26 associated with the present scale. The setting of the locking devices associated with the present scale is stored in register 178 when this register receives a hold input signal. Upon receipt of a polling input signal, the content of the Re- m gisters 178 again in the associated locking means 26 of the present scale input. The register 178 is used to store information relating to the scale of a previous drawing, as will be seen in greater detail below.

The shift switches 46 contain a coarse control switch, which has segments or switch levels labeled C. It also belongs to the shift switches a fine control switch, which has segments or switch levels denoted by F. The F switch segments are from one controller is jointly controlled, and the C switch segments are expediently controlled by a second controller ™. These switches are otherwise identical to one another; Further details can be found in FIG. 10. As can be seen, the switch contains 4 segments or switch levels 180, 182, 184 and 186, the switch arms of which are coupled to one another. Each switch level has 16 contacts. Each selected Contacts are interconnected and connected to a line carrying a voltage V. Thus, the voltage V in selected switch positions are applied to the stages of the comparator 54. The arrangement is like this made that the switches apply a binary-coded input signal to the stages of the comparator 54-, the switch level 180 delivers the lowest significant digit. In the

00S847 / 1538

BATH ORIGINAL

The cover position of the switch does not give any of the switch levels an output signal to any one of the comparator stages. In the one position, the switch level 180 outputs an input signal to the first comparator stage. In position 2 the switch level 182 outputs an input signal to the second comparator stage. In switch position 3, the both switch levels 180 and 182 each have an input signal to their associated comparator stages, etc. The The signals are output in binary form. Since each switch level has 16 positions, there are a total of 256 combinations possible. The F switch does this Fine adjustment, while the G switch effects the coarse adjustment.

The in Ii ¹ Ig. The comparator circuit 54 shown in FIG. 6 comprises a binary adder, in which each stage adds the output signal of a switch level and the digit stored in each stage of the shift register 50. Each comparator stage outputs a sum output signal to an OR gate 188 and a carry output signal c to the next adder stage. The comparator formed in this way thus adds the content of the switches 46 to the content of the shift register 50; it supplies the output digits of the total to the OR gate 188. The OR gate 188 controls the clock generator 48 via an AND gate 190. The AND gate 190 receives an instruction I ¹ F (frame) at a further input, so that the OR gate only acts for the write-through frame operation of the system. The output signal given by the switches is negative in relation to the output signal of the shift register 3, so that the comparator does not emit an output signal, i.e. only binary 0 if the content of the switch (in absolute value) is equal to the content of the shift register is. The clock generator 48 is activated whenever the comparator emits an output signal other than the zero output signal.

009847/1538

Now assume that the mechanical switch is on Generate an output signal that is equal to the binary number 121 (122nd position, since position 1 is equal to 0). A minus sign is assigned to this number because the switches are actually generate the inverted value. This means that the switches are viewed • set to a -121, that Input from the shift register? 50 must to achieve of a result from Hull here would be +121. If the content of the shift register is too small, e.g. +115, the clock generator 48 is activated. If there is no of a carry output signal c from the comparator 54- the shift register causes signals to be in a forward direction to record. At the same time, the counter receives 14 * pulses from the clock generator 48. This has in corresponding This means that this counter counts in a positive direction. In contrast to this, in the case that the The content of the shift legal 50 is too large, dex 'clock generator 48 an input to the slip register and to the up / down counter 14. The carry generated thereby causes the register 50 and the counter 14 to have a Carry out negative counting until the output signal Is zero. The circuit in question thus works as a digital servo mechanism with regard to the delivery of a Series of pulses from the clock generator 48 to the up-down counter 14 until the error between the contents of the Shift register 50 and switches 46 brought to zero is. The comparator 44 represents the error detector device.

The output signals or output pulses of the clock generator 48 become the up / down counter directly via the OR gate 70 14 supplied; however, they are indirectly fed to the shift register 50. The outcome of the first Stage or R "stage of the up-down counter leads to

00i847 / 1S38 _{BAD 0RlslNAl} .

an input of the divider 52 out. This divider 52 also includes a counter which is formed from Yiip-Flop stages connected in series. It should be noted that successive stages of the filer 52 deliver a reduced count to the ODEE gate 194 compared to the number of pulses fed to the up / down counter 14 via the OR gate 70. The respective reduction ratio is selected with the aid of the output signals of the locking devices 60 associated with the most recently used scale. These locking devices 60 select a UEID gate from a plurality of UWD gates 196 which connect the outputs of the divider to the OR gate 194. The OR gate 194 controls a monostable multivibrator referred to as a monostable multivibrator, the output signal of which is fed to the shift register 50 via an AND gate 200. This is the pail when the UKD gate 200 is triggered by a ¥ Έ (frame) command. In the frame mode, there is thus a subset of the increase factor between the counter position in the up / down counter 14 and the counter position in the register. This reduction factor is determined by the scale of the previous drawing. The information relating to this scale is stored in the locking devices 60 associated with the most recently used scale. This last magnification is used for the drawing which can be viewed in the usual way on the display screen of the cathode ray tube during the frame operation, since this drawing has just previously been stored in the storage tube.

During the pointer frame operation, the switches refer to the displacement of the pointer frame in absolute values selected on the digital input information. However, there is a desire to adjust the pointer frame in relation to it

000847/1536 bathroom

to the image on the CRT display screen to look at, the hatred stick is shown on the display screen of the cathode ray tube

the/
Representation in / uem the last used scale is referred to the locking devices associated with it, the information entered into the shift register being correspondingly scaled down. Each setting of the fine adjustment switch corresponds to a count of 32 of 8192 possible counts of the counter 14 ·. If the stored display was an SK display, each setting of the fine adjustment switch must move the pointer frame by 1 / 256th of the display. The full display screen area of the digital-to-analog converter in frame mode is 512 counts, as will be seen in greater detail below. If the locking devices associated with the last used scale are set to the reduction ratio of SK, then only a reduction factor of two is required for the information entered in the shift register. This reduction takes place in that the output signal of the R. stage of the up / down counter is fed into the shift register 50. Then two counting pulses are entered into the up / down counter 14 for each counting pulse fed to the shift register. The pointer frame moves by 1 / 256th of its entire screen area. With a previously used scale of 4-K, each fine adjustment of the fine adjustment switch must move the pointer by 1 / 128th of the display accordingly. With a previously used scale of 2K, each setting of the fine adjustment switch must move the pointer by an amount equal to 1 / 64th of the display, etc.

Used from one frame establishment to another character establishment is passed over, the complement value, increased by one, of the content of the Versctr ebe register 50 via the gates 202.

0 Ö 9 8 k _7/1 B 3 θ BAD

entered into the up / down counter 14. Since each setting of the leash switch results in changes in the contents of the up / down counter 14, corresponding to the counter values of 32, the output of the shift register only needs to go into stages Hg to R ,,, of the up / down counter or to be entered in those counter steps of higher significance which are above the counter steps associated with a counter setting of 32. The content of the shift register is then transferred to the up / down counter when an overflow is passed from a liahmen operation to an operational readiness display in which operational devices make a record. The content of the up / down counter is in parallel form in the stages IL. to IL ^ of the counter introduced, ie there is a "shift transfer". The transmission takes place under the control of the monostable multivibrator 204, which emits an output pulse when switching from the liahmen mode to the ready-to-run mode. The leading edge of the output pulse causes the transmission by activating the gate 202. This output impulse is immediately assigned to the steps \ ly. to R- and R _x . ^ and R ^ ₁ . fed. This direct supply of the output signal of the monostable multivibrator leads to the storage of a one in the stages H. to R _x . and R ^ n and i ^ c · then causes the trailing edge of the output pulse of the monostable multivibrator 204 that the Vorwärtsrtückwärts counter, an input signal is supplied via the gate 70th The complement value fed to the up / down counter via the gates 202 is thus increased by one. This is necessary to preset the counter 14 in the right way. The stages R ^ to R ₁ - are preset to one, so that one of these stages is returned by zero by adding one. In fact, the addition of a one in the stage R ,, leads to a carry over to a stage Rg. This concludes the process relating to the increase in the complementary value by one, the

008847/1538 _{BAD 0RielNA} u

Levels R. ^ and R-_ are returned to their zero position

At times it may be desirable to check the contents of the slip register 50 store so that the representation can be called up again at a later point in time on a specific scale. It turns out that the the six-way connection device for the respective re-recording supplied digital information is largely the same as it was supplied before, while only the scale and displacement are different from the previous values. There is now a desire to have a yardstick to reserve, the content of the shift register 50 is transferred to a memory register 2Q6 with the aid of a hold command stored. To use the same scale and offset again at a later point in time to produce the desired representation of the drawing, a fetch command is sent to the memory register 206 delivered, and the relevant information is again in the up / down counter 14 and in the shift hegister 50 transferred. As mentioned above, the same hold and fetch instructions control the storage register 1? 8 for storing and calling up the scale at.

During frame operation, i.e. when the pointer is framed on the CRT display screen As can be seen, the frame generator 56 generates a frame in analog form. This is done with the pointer shift started in the lower left corner. This means that the digital-to-analog converter 24 is operating during the Hahmen deflects a pointer to a point on the CRT display screen and then analog voltages to deflect the electron beam along the 'frame track. The frame generator Dr 56 emits suitable deflection voltages to the summing point 34,

000847/1538

BATH ORIGINAL

so that the horizontal deflection leads to a suitable image formation. The frame generator supplies a matter of course, the output signal sequences for Lden Y channel to this channel in a corresponding deflection to bewix ^v i: s. This is done by appropriate control of the vertical deflection plates of the cathode ray tube. A block diagram of the frame generator is shown in FIG.

According to FIG. 14, capacitors 208 and 210 are normally held at zero volts with the aid of clamping circuits associated with an upper voltage value and 214 with the voltages applied to them. The relevant clamping circuits en 'are also referred to below as "upper" clamping circuits. A freely oscillating trigger generator 216 generates pulses at times I ¹ ,., IV, etc., specifically at regularly offset intervals. Each of these pulses triggers an Ii ¹ IiP-FlOp 218, which emits signals for controlling a gate 220 at its output Q. The gate or gate 22Q connects a current source 222 to the ungrounded surface of the capacitor 208. The direction in which the current 21 flows is chosen so that the capacitor is charged in negative 'light, as indicated by the Si (v .nalv erlauf 224. Charging takes place until the voltage at the ungrounded surface of the capacitor reaches a value as determined by a clamping circuit 226 that defines a lower voltage value At this point in time, the lower clamping circuit 226 controls a flip-flop 228 which emits a control signal for switching on a gate or gate 2JO at its output Q. The current 21 emitted by the current source 232 charges the capacitor 210 in negative direction, as indicated by the signal train '234. The charging continues until'

BATH

009847/1538

the voltage across the capacitor reaches the value e3? which is set by the lower clamping circuit 236. the lower clamp circuit 236 resets flip-flop 218 to its initial state. This opens gate 220, whereby the current source 223 begins to charge the capacitor 208 back to ground potential, i.e. to the potential which is determined by the upper clamp circuit 212. When the voltage on the capacitor 208 reaches the value of the ground potential, the upper clamp circuit 212 resets the flip-flop 228. The gate 230 then opens. The current source 233 then charges the capacitor 210 to earth potential · back. Signal trains 2§4 and 234 are suitable for the generation of an Ilahmens 44, who at the by the designations Ί ', T. begins and ends. The voltage on the ungrounded plate of the capacitor 210 is across the resistor 238 and an inverting Amplifier 240 led to summing point 34, namely for the X-deflection amplifier 138 according to FIG. 6.In correspondingly, the voltage on capacitor 208 is passed through resistor 242 and an inverting amplifier 244 is applied to a summing point for a Y amplifier in the Y channel 68. The inversion of the signal trains causes the frame position denoted by 44.

The upper clamps 212 and 214 also provide output signals on lines 246 and 248 which lead to an OR gate 250. The output signal of the OR-gate 250 is fed to the Z-amplifier 64 (FIG. 6). If one of the capacitors has a voltage other than zero volts, an upper clamping circuit emits an output signal to control the Z-axis of the tube. In this way, the electron beam can perform a write operation, with a somewhat reduced e oltage ls ρ applied to the control grid 66 st _a lower constant the

Q Ö 8 a A 7/1 _{b 3 8 BAD 0B5GINAL}

At the rate at which the capacitors 208 and 210 are charged and discharged, the electron beam current density is selected at this point in time so that the electron beam in question does not produce any bistable writing information on the display screen of the storage tube. The frame is thus visible on the storage tube; it can be guided around on the tubes with the aid of the scale pushbutton switches 28 and with the aid of the slide switches during operation of the liahmen without being saved. The electron beam does not apply sufficient charge to the storage dielectric during this display of the frame so that a stored positive state would be achieved. Thus, the phrase "write through" is applied to the frame. It should also be noted that the OR gate 250 only controls the Z-amplifier 64 when the frame is moving, but between frame generation processes. The frame is generated repeatedly by the repeated pulses ΐ ₀ , IV, etc. These pulses should have a longer period than the time between T ₀ and T ..

The amplitude of the signal trains 224 and 234 and thus the The size of the frame on the cathode ray tube is adjustable with the aid of the control circuit 252. The control circuit includes a voltage divider 254 connected between ground and is connected to a voltage terminal emitting negative potential. Along the tension part is a multitude connected by gates 256. These gates each work in pairs; they each use a specific point of the Voltage divider with the lower clamping circuits 226 and 236. The gates are from the comparator circuit 5 & in Fig. her poured out that the size of the present setting the scale switch determined. This setting is through the locking devices belonging to the present scale 26 saved. The previous setting of the Mai.ffcib switch *? v / is carried out when the display is saved

009847/1538 bad ORiGiNAL

the locking devices 60 are displayed. If, for example, the new scale is a 32nd of the previous scale, the two upper gates 256 are transferable, whereby the lower clamping circuits 226 and 236 are connected to corresponding points of the voltage divider .254-. The amplitude of the signal trains 224 and 234 is correspondingly low for the generation of an Is ^ JL a lame s on the display screen of the cathode ray tube. As can be seen, the size is adjustable between 1/32 X and 2 X. The last-mentioned size setting means that there is a larger frame scale than in the previous illustration. In the latter ITaIl, the entire frame would appear on the CRT display screen. However, it is also possible to proceed in such a way that part of this paralysis occurs.

The control circuit 252 is controlled by the comparator circuit in FIG. Ξ>. A part of this comparator circuit is also shown in FIG. According to FIG. 11, a combination of gates is provided which control the two lower gates 256 in FIG. 14, ie the gates for generating a 2X frame. The locking device !! 26 and 60 are connected as shown. That is, a 4K latch L and an SK latch P provide the inputs to AND gate 258. In a corresponding manner, a 2K locking device L and a 4K locking device P supply the input signals for a second AND gate 260. In a corresponding manner, an IK locking device L and a 2K locking device P supply input signals for UMD gates 262. A 500 -Locking device L and a 1'K-Vex'riegelurigseinrichtung P provide the input signals for a UHD gate 264, and finally a 250 locking device L and a 500 locking device P provide the input signals for the

0Ö3847 / 1B38

SAD

Ui.D gate 266. The outputs of the UItD gates 258, 260, 2.62, 264 and 266 control two via OR gate 268 X gate 256 on. It should be evident that in that If one of the locking devices 26 is in the 1 state is, ν / omit a Ka-C bar enlargement by a factor of two in With respect to the latch 60, which is in the 1 state, the 2X gate is turned on. One corresponding connection of AND gates and an ODEIt gate is for each pair of gates 256 in Fir ;. 14 provided. This means that for the purpose of driving the 1X gate 256 in FIG. 14 are those associated with the present scale Locking devices have the same scale as the locking devices belonging to the previous scale have to show. In a corresponding way, the interlocking devices associated with the present Ilaßstab for the control of the 1 / 2X gates display a scale that corresponds to 1/2 of the last used scale, namely regardless of the respective values. The operation of the comparator circuit 58 is illustrated in a table of values in FIG. Every intersection at which a multiplication factor is present means an AND gate; all The same multiplication factors mean inputs to one and the same OR gate and a control accordingly designed gate in the control circuit 252 according to FIG.

It is advantageous to carry away the pointer from the screen sov / ie on the "-" chirm set as long as the notes end of this pointer names still has meaning, that is, when a I ¹ of the frame is eil visible on the CRT. To achieve this flexibility, the part of the Vorw ^; irts - '? ücI: upward counter 14, which is connected to the digital-to-analog converter 24, fills halfway at the beginning of the Hahmen operation. This is done by putting a one in stage H _{-10 of} the up / down counter in the frame mode

00S847 / 1S38 _0B , _emW .

is entered, as Fig. 6 illustrates. At this point in time, the switching matrix is further controlled in such a way that only the counter stages T? .. to R ^ _{0 of} the up-down counter are (or can be) connected to the digital-to-analog converter 24. Thus, when a counter value is entered in the up / down counter, the pointer would be moved halfway over the representation on the display screen or in the middle of the display screen. A counter value of 1024 is required to generate 1CV24 level values and for normal full screen deflection on the cathode ray tube. The voltage generated by the digital-to-analog converter 24 for a full screen deflection is one volt, so that the counter value 5Ί2 emits one-half volts from the digital-to-analog converter. To counteract the center screen setting of the pointer, a voltage of -0.5 volts is added to the output signal of the digital-to-analog converter at the summing point 34. This moves the pointer to the left side of the screen (i.e. in the lower left corner of the two axes). The position of the pointer would now correspond to the position designated 270 in FIG. 15 in relation to the representation on the display screen 273 of the cathode ray tube. The range of movement of the pointer in relation to the display screen as a result of the outputting of an input signal from the clock generator 48 to the switching matrix 22 ′ is illustrated in FIG. 15 with 272. By doubling the gain of the amplifier 138 in frame mode, it is possible to expand the pointer to the total screen area (and even beyond), as is indicated in FIG. 16 with 264.

The screen area of the pointer comprises 512 count values of the up / down counter 14 in the frame mode and not 1024 count positions. It should be noted that the move away

008847/1538 ^ _n «*» · «·

of the pointer from the display screen a frame corner or make part of the frame visible on the display screen. Then some of the data may not be seen t / earth can be meaningfully designated. This may be desirable, e.g. for the next new recording deliver an advertisement.

The control change between the ready mode and the frame mode is made using pushbuttons 276 and 278 carried out. These push buttons are provided for controlling a flip hop 280. In the ready mode, in which the system is ready for the step-by-step recording of the impulses delivered by the liechner connection device 11, is information from the shift register 50 in the Forward-backward counter 14 transmitted, under the Control of the multivibrator circuit 204, and further a one is added to the contents of the up / down counter 14. The Z-axis control is also activated via the AND gate 162. A point are stored on the CRT display screen when the switch matrix receives information and Changes in the least significant bit position occur.

If the frame pushbutton 278 is actuated, it changes Flip-flop 280 changes to its other state in which a number of functions are performed. The AND gate 190 It is controlled in order to close a servomechanism with the aid of which counting pulses emitted by the clock generator can be entered into the up-down counter 14. Of the The purpose of this measure is to set the pointer. Furthermore, the AND gate 200 is controlled in such a way that Counting pulses in a suitable ratio in the up / down counter 14 and entered into the shift register 50. AND gate 192 is set to read the carry output signals from the comparator 54 the counting direction of the

009847/1538 bad original

.- 46 -

Shift register 50 and the forward a-down counter 14 can control. In addition, a one is entered in the tenth bit position of the up / down counter. The Z-axis control circuit is blocked. At the same time, the lip-pop 280 emits an output signal to the switching matrix 22Q ¹ , so that only the ten lower-valued bit steps of the up-down counter are connected to the digital-dialogue converter during the frame operation As mentioned above, a voltage of -0.5 volts is added to the output signal of the digital-to-analog converter. The amplifier 138 is controlled so that it has a double gain. The frame generator 56 is also controlled so that a analog "write through" frame is generated.

The following is the operation of the system according to the invention considered in more detail using the block diagram of FIG. In this context it is assumed that one of the pushbuttons 28 is pressed, so that a digital step information recorded by the computer in the desired Hatred is written. The maintenance matrix 22 'is like this set that corresponding output signals of the up-down counter 14 is input to the digital-to-analog converter 24 in order to obtain a scale of the appropriate size achieve. Depending on the selected hatred bar, certain outputs of the up-down counter 14 are switched so that that they prevent the writing process of the electron beam 146, through the action of the Ξ-axis locking circuit 32. To avoid "multiple exposures", only the counting range from zero to the through the maximum selected switching matrix is used to control the digital-to-analog converter. All bits higher , Order (which are not fed to the digital-to-analog converter) must be zero for the Z-axis circuit so

0ÖÖÖ47 / 1 538 BADORlQtNAt

the electron beam of the cathode ray tube can be switched on and grounded. Thus, the up / down counter 14 subsequently range from Hull to its normal counting range of 8192. Although those selected by the switching matrix Low significant bits may be present when the Voi ^ / arts down counter goes through this entire Counting range counts, it is only these lower-valued bits that enable the electron beam to generate a Write vox'gang to carry out. The other "areas" represent A ^ an-t information is thus left out of consideration, unless the scale pushbuttons are set to 8K will.

The ready button is pressed to change the state of flip-flop 280. As a result of this measure, a pulse is emitted by the monostable multivibrator 204. The complementary value of the content of the slip register 50 is introduced into the stages Rg to : ■■>., Of the up / down counter 14, and a one is also added to this content via the gate 70. Any previously determined shift can thus be added to the content of the up / down counter so that the information area displayed on the cathode ray tube is a selected part or area. This takes place on the basis of the presetting or pre-loading of the complement value increased by one in the counter 14. The area of interest then changes into the part of the lower valency of the switching matrix. At this point in time, circuit 32 does not lock the Z-axis. After receiving the ready signal, the computer connection device signals to the computer that the graphic display system is ready to accept serial digital information in the form of step-by-step character input signals. The information includes, as far as the X character axis is concerned, a series of pulses from the terminal P of the computer terminal 11, and

- 009847/1638 bad original

in connection with commands "left" or "right". If the information is given gradually, it leads the up-down counter 14 counts through the entire Drawing as it is stored in the computer memory. At the same time the relevant Information to D ^ i g it al -An al ο g-W to dl er 24 delivered. this is due to the fact that the electron beam 146 of the cathode ray tube moves through the designated places and leads to the storage of the drawing. Hach done When the information is released from the computer, the drawing in question appears on the display screen of the Cathode ray tube stored. The delivery of the information that is generated by the occurrence of a first pulse at terminal P of the computer connection device 11 is displayed, also causes the setting of the scale associated with the last used scale Locking devices 60. These locking devices 60 then draw a scale-related one Information in which the present drawing has been stored. Solve of course the Z-axis signals also display the drawing in conjunction with X- and Y-axis signals.

It should be noted that during the drawing process the cathode ray tube stores a point only when the information from the up / down counter 14 changes, and by storing a change in the low-order bits that are fed to the digital-to-analog converter 24 will. If new information is not received by the computer connection device, no point is written. It should be noted, however, that the Z-axis control posture 62 a trigger signal from both the X-channel and from picks up the Y-channel, so that when the stored information is changed step-by-step in an orthogonal direction a new point can be written.

009847/1538 bad qriqi _Nal

After the drawing has been presented, it may be desirable to select a particular area of that drawing to be enlarged or even reduced. The frame pushbutton is pressed again for this purpose, whereby the flip-flop 280 changes to its other state. As a result of this switching measure, gates 190, 192 and 200 are activated. The frame generator 56 is also activated, and a voltage of -0.5 volts is fed to the input of the X-amplifier 138. The gain of this amplifier is changed to X2. At the same time, the switching matrix is controlled in such a way that it connects the stages R ^ to Rq of the forward / backward fcs counter 14 to the digital-to-analog converter 24. In addition, _{a one is added to stage R ^ 0} , which has the effect that the up / down counter is half full.

If the same scale is selected during the transition from the ready mode or symbol mode to the iahmen mode, by pressing one of the pushbuttons 28, then the entire stored display is surrounded by a frame 44, as indicated in FIGS. 2, 4 and 5. It is also assumed that the switches 46 have not been changed. When the slide switch is rotated, the frame becomes together with a reference indicator, which aln in the lower left corner is assumed to be shifted with respect to the saved display. Will be another push button is selected, the size of the frame 44 is correspondingly changed, under the influence of the comparator circuit 58, which the currently selected scale with the scale compares the one selected in the saved display. Will setting the shift switch changed, the clock generator 48 can generate a series of clock pulses issue which to counting operations in the up / down counter 14 and the shift register 50 to lead. The counter positions in the counter 14 and in the

00ÖÖ47 / 1538

Register 50 are not the same, namely "due to the presence of the divider 52. This divider 52 eranlaßt 5O ₅ to include a smaller number of pulses, the shift Zegister. The number of counts that has the counter 14 now counted , is characteristic of the movement of the pointer frame on the scale of the stored display, namely as a result of the control of the output signal scaled down into register 50. The scaling down case is controlled by the locking devices 60 associated with the last scale used of the shift register 50 has a sum equal to the sum selected by the shift switch Br 46, the clock generator 4-6 is no longer enabled.

If an area of interest has been selected from the stored display within the frame 44- and is then the Ready button is pressed, which causes the feeding of the gradual Character information from the computer terminal occurs, the erase generator 153 is put into operation. This will erase the previous display on the storage cathode ray tube storage screen. Simultaneously will be the complement worth of the. Information from the Shift register 50 into up-down counter 14-again entered. This counter value is increased by one. The shift register has saved the shift and now delivered. Thus, with the exception of the information of the area, that remains previously selected by the frame isb, all other information from the computer is not taken into account. Hence the information presented is always related to the previously stored display, and the information can be consecutively "^ ummi lens-like" be pulled apart until a particularly interesting area is determined and to the desired extent is enlarged.

009847/1538 bad original

Finally, it should be noted that the invention does not apply to the exemplary embodiment described above is limited, but modified in various ways without deviating from the inventive concept l'.ann.

009847/1638 BAD OftiGINAL

Claims (1)

1. Graphic. Display system, characterized in that a Drawing device (14) is provided which receives digital input = daj; en and output signals to a display memory device (36) to execute indications in accordance with the digital input data indicates that a pointing device (# 6) is provided, which supplies a pointer display related to the respective display and contains the facilities which the Allow size and position information of the pointer display to be set, and that devices (60, 26) are provided which cause a new display to be saved depending on the size and position information mentioned, with the new display to be saved the one selected by the pointer display Area of the previous display. 2. System according to claim 1, characterized in that A = directions are provided that the position of a pointer display to select a second display to be saved under Berück = refer to the stored position information. 3. System according to claim 1, characterized in that the display storage device (36) is a cathode ray tube (36) with bistable memory properties that include a write = electron gun (142) for writing an advertisement and an over = flooding electron gun (154) for display storage by selective secondary emission on the fluorescent display screen (152) of the cathode ray tube (36), and that the pointer with the help of from the writing electron gun (142) emitted, Electrons possessing such a speed and strength are recorded that just none Storage of the 2-hand takes place. 4. System according to one of claims 1 to 3, characterized in that that the drawing device (l4) has a digital counter (14) contains the successive character input signals 0Ö98A7 / 1538 stores that an analog display device was in progress, controlled by the counter (14) provides a stored indication corresponding to the character input signals that the Pointing means a signal generator (48) and means (54) which selectively receives an output signal from the signal generator (48) go to the digital counter (14) ^, namely for the delivery of a related to the stored information Pointer to the display device (36) j that devices (46) for controlling the signals from the signal generator (48) to the counter (14) Signals to be output are provided that this device (46) select the position of the pointer and a digital servo mechanism cause the output signal of the signal generator (48) to be sent to the counter (14) until it becomes a function of the pointer position achieved. " 5. System according to claim 4, characterized in that the digital Servomechanism a register (50) for receiving at least one Part of the input signal generated by the signal generator (48) a ^ n the counter (14) is delivered and a comparator (54) Contains the content of the register (50) with the content of the selection device (46) used to select the position of the pointer comparison*. 6 · System according to claim 5, characterized in that between the signal generator (48) and the register (50) a divider (52) is provided and that a device (60) for controlling the i Reduction factor of the divider (52) corresponding to the enlargement factor to be stored in the display device (36) Ad is provided. 7. System according to claim 4, characterized in that the servomechanism a register (50) for storing a function of the counter (14) supplied to set the pointer Contains input signal and that devices are provided which then a function of the content of the register (50) store in the counter (14) for the subsequent recording of the step-by-step RECORDING-S input signals accordingly the selected position of the pointer. 00984 7/1638 _om \ u * L inspected 8. System according to claim. 7 »characterized in that the Register (50) receives part of the input signal that the counter (14) receives from the signal generator (48), and zwa ^ jr according to the magnification of the recorded Information, and that as a puncture of the stored in the counter (14) Contents of the register (50) which is used to increase the complementary value of the register (50) by one. 9. System according to claim 5, characterized in that -J: .3 UinriehtuE at (26, 60) are provided, which the magnification factor hold the stored display and control the divider (52) so that the pointer movement according to the magnification the saved recording takes place. 10. System according to claim 9, characterized in that A frame (44-) selectable is assigned to the pointer. is and that means (58) are provided which adjust the size of the liahmens in that they make a comparison between the selected magnification and the magnification related to the stored Recording is saved. 11. System according to claim 1, characterized in that the drawing device (14) contains a digital counter (14) which sums up successive recording input signals step by step so that an analog display (j56) from the GaIiIo. " ¹ ^ 14 } controlled supplies a stored display as a function of the recording input signals that the analog display device (36) contains a Digifcl-to-analog converter (24) which is connected to a plurality of stages of the counter (14), the stages of the Bit positions of successive different numerical skills are assigned so that the digital-to-analog converter (24) converts the respective counter result into an analog value that is used for the deflection 009847 / 1B38 BAD ORiNAU 1961268 an analog display can be used, and that devices (22) are provided which simultaneously change the coupling between the transducer (24) and the counter stages in a first direction such that the Digital-to-analog converter (24) receives a digital input signal from bit positions having a lower significance to enlarge the analog display is available, or the coupling in question in a second direction change, in such a way that the digital-to-analog converter (24) has a digital input signal from a Bit positions with higher significance are available to reduce the magnification of the analog display stands. 12. System according to claim 1 ^, characterized in that Facilities (20, 42, 40) are provided to avoid an overlapping display through the analog display prevent the display of counter readings, polygamy go beyond the counter setting that the digital-to-analog converter (24) is able to convert. 13 · System according to claim 11, characterized in that a signal generator (48) is provided which selectively a pointer input to the counter (14) provides that a shift selector (46) for selection the position of the pointer in relation to the display is provided that a shift register (50) is provided, the receives the pointer input and that a comparator (54 ·) is provided, which is assigned to the shift selection device (46) and the shift register (50) and which is the delivery of an output signal by the signal generator (43) for step-by-step switching of the counter (14) and the shift register (50) outputs until the shift register (50) has one through the ' Shift selection device (46) has reached the selected register position. 009847/1538 19612 14. System according to claim 13, characterized in that Means are provided for presetting the shift register with respect to the repeated incremental recording input signals a puncture the complement value of the shift register (50) The recorded counter result is transferred to the counter (14), 15. System according to claim 14, characterized in that Means (52) are provided which reduce the output from the signal generator (48) Pointer input signal, which is the shift register (50) is fed according to the selected magnification. 16. System according to claim 11, characterized in that the analog display device (36) is a bistable Storage cathode ray tube (36) which has storage properties and which are gradually changed to the respective Takes analog value and creates a visible recording. 17. System according to claim 16, characterized in that a frame generator (56) is provided, the additional analog values for the analog display in addition to those of the Digital-to-analog converter (24) delivers analog values supplied, and that these additional analog values for Lead representation of a frame (44) which surrounds part of the Analoganaeige. 18. System according to claim I7, characterized in that the devices (22,20,42,40) for changing the coupling between counter (14) and digital-to-analog converter (24) also set the additional analog values, namely for 009847/1638 B ^ _OfflGINAL Setting the size of the frame (44) in relation to on the saved display. (19 * 'System according to claim 1, characterized in that the recording device (14 ·) an up-down counter (14) for receiving serial digital recording input signals emitted by a "computer (10) contains, to be summed up to a sum that is characteristic of the location of a point at which storage on an analog display device (36) takes place that a 'digital-to-analog converter (24) is provided, which the counting result from the up-down counter (14) picks up and emits an analog output signal, the level of which is characteristic for the counting result of the up / down counter (14) that a bistable storage cathode ray tube (36) with first deflection devices (136) is provided which in response to this analog output signal a write electron beam (146) to make a memory read, that to adjust the size and location of the information between the up / down counter (14) and the Digital-to-analog converter (24) a switching matrix (22) is provided, which the output digits in the converter (24) according to a selected magnification, with successive ones for magnification with a larger division factor Digits of higher value and for enlargement with a lower reduction factor - ' consecutive digits of lower significance from that Up / down counter (14) are selected that for suppressing the electron beam (146) of the storage cathode ray tube (36) devices (32,62) are provided, controlled by those digit levels of higher significance of the up-down counter (14) which are not connected to the switching matrix (22) with the BATH 009647/1638 Digital-to-analog converter (24) are connected, and that only the counter content of lesser significance of the Up / down counter (14) is used to generate an analog output signal and repeats of the lower valued digits for a stronger collection in the up / down counter (14) are avoided. 20. System according to claim 19 _5, characterized in that a clock generator (48) is provided which sends an input signal to the up / down counter (14). After the digital information has been recorded by the computer (1o) through the storage cathode ray tube ( 36) gives off that this clock generator (48) is used to generate a read-through pointer frame (44) on the storage cathode ray tube (36), that devices (46,54,50) are provided for controlling the clock generator (48) which have a contain a second register (50) representing the counter, which? also receives selected signals from the clock generator (48) that switch devices (46) for selecting the displacement position of the pointer frame (44) are provided, that a comparator (5 * 0 is provided, which the content of the register (50) with the content compares the switch device (46) and only enables the clock generator (48) if the relevant contents do not match, so that the comparator (5 ² O also the register storage device (50) and the up-down counter (14) controls that the register (50) assumes a counter status in a direction to compensate for the setting of the switch device (46), that the digital-to-analog converter (24) sends the position information from the up-down counter (14) to the storage tube ( 36) outputs and thus defines the pointer frame (44) in relation to the stored display, and that an analog frame generator (56) is provided which 008847/1638 _{BAD 0R1} ginal the electron beam (146) from the pointer position with generation of a "related to the stored information" Frame (44) deflects accordingly. 21. System according to claim 20, characterized in that a divider device (52) is provided which reduces the output signals of the clock generator (48) the register (50) outputs, and that a number of locking devices (60) storing the last enlargement are provided, which the dividing device (52) control in such a way that the indexing frame (44) can be adjusted using the slide switch (46), and in precise relation to the stored - "- display. 22. System according to - "- nspruch 20, characterized in that Devices are provided that store the setting of the switching matrix (22) and the register (50) and the setting of the switching matrix (22) and the Make register (50) on a command and a function of the complement of the stored setting of the register (50) in the counter (14). 23. System according to claim 20, characterized in that a plurality of gates is provided, which a transmission make the complement value of the information in the register (50) in the up-down counter (14), namely to set a new record that means for adding a one to the Contents of the up-down counter (14) are provided, and that the electron beam (146) of the cathode ray tube ^ 36) through the "locking device (32,62) with Except for the area of the recording commands blocked which corresponds to the pointer position selected by the slide switch (46). 009847/1538 bathroom 24. System according to claim 20, characterized gekennzeichni that the storage cathode ray tube (36) is provided with a second deflection device (139) for an electron beam deflection at right angles to the first electron beam deflection and that this deflection device (139) by appropriate connection to a ^v o: Downward? LÜckwärts counter, to a switching matrix, to a digital-to-analog converter, to a register, to a comparator and to a shift switch deflection of the electron beam (146) in a deflection direction at right angles to the sealing of the first-mentioned electron beam deflection (136) causes. 25. System according to claim 24, characterized in that the frame generator (56) sends two signal sequences to the two deflection devices (136, 139) for the purpose of generation a rectangular T-frame (44) on the display screen (152) of the storage cathode ray tube (36) emits that the amplitude of the signal sequences corresponding to the selected Magnification factor is selected, namely in comparison to the saved, previously used recording magnification, and that the signal sequence guides the electron beam (146) at such a high speed that a Storage of the frame (44) with the selected beam brightness is avoided while it is being displayed. 26. System according to claim 1, characterized in that the recording device (14) contains a digital counter (14) which gradually changes its counter position on successive recording input signals, that the display device (36) makes a recording as a function of the total count, that the devices (46,50,54) for setting the size and position of the information at the same time comprise the successive digits changing devices, that devices (32,62) ■ BATH 009847/153 8 are provided that suppress the display of digital counter settings that have such counter settings selected by the facility to change these digits at the same time, and that means are provided for adding a digital input signal to the counter (14-), namely to change the range of the incremental recording input signal, which does not block the display for the selection of an area of the display. 0 0 9 8 A ^{7/1 5 3 8 BAD 0R1GlNAL} Blank page