DE1946014C3 - Method for displaying the course over time of a series of measured values in digital form on the screen of a display device - Google Patents

Description

is pictured. ",. . · _F ; "

Recently, dynamic shift registers .η integrated MOS technology available on the market which has a large capacity with a small construction volume

Arrangements are known, e.g. B. from the French Patent specification 1 460 925, which is used as a picture reproduction

the screen is guided and_d I

right to the line direction die -R "* tung ^ f ^

as is known per se, and that Scnzulässiicn shift clock frequency is greater at the beginning of Ab as Bildw.eder _ho f _une sspeichcr the number of stages of the shift register ^{holun8Ssp "c"} I, Lrstellen as the STEL

SÄ one like that, c _h e "o _to ha, bd _er n« * »-

allowable shift frequency lying clock frequency, that output stages, which from the address counter 17

the rotational frequency of the shift register can be controlled equal to that. With the shift register of the input

Is refresh rate, at the output point and output register 9, the shift register 8 is in

of the shift register. Connected in series so that the two registers make one

The number of stages in the shift register is therefore greater than the 5 ring buffers form.

Bit number of all measured values. In a number of From the input and output register 9 are the Therefore no information is given for levels. The each- measured values cyclically on the display screen empty steps are therefore shown as empty spaces. The electron drawing runs over this. So that their number and the number of stages of the beam line by line, whereby he dark shift register when returning is as low as possible, they are keyed to io. In principle it is possible to use the time axis the issuing point preferably with one in the line direction. It is more advantageous However, the frequency is close to the lower limit frequency if the time axis is perpendicular to the lines pushed past. The shift clock frequency is therefore running. In this case, the saved different, depending on whether the information is converted into digital values in periods of time. For this holding positions or the spaces on the output 15 can begin with the start of the scanning of a line of the output point of the shift register are pending. The sliding preset counters 3 with the respective digital value of the clock frequency can then be particularly easily obtained input and output register 9 loaded and with the if they are counted down when the blank pulses from the clock generator 5 are pushed past len at the output point of the shift register become the same, while the electron beam darker Line frequency is chosen. This is then distracted 20 keyed. When the counter is reached, when the lower limit frequency is close to "0", the preset counter gives 3 to the pulse lower the line frequency. central 2 from a signal with which the electrons-On hand of the drawing are in the following the beam is brightly keyed. That kind of digital time invention as well as other advantages and supplements implementation is characterized by its simplicity and described and explained in more detail. 25 accuracy. The representation in histograms F i g. 1 shows an arrangement for implementation is also possible by using the electron beam of of the new procedure; in the beginning of a line until reaching the NuIl-F i g. 2 are pulse diagrams to clarify the position of the preset counter 3 is lighted, of the new procedure shown; Of course, a preset counter can also be used i g. Figure 3 shows an arrangement for highlighting 30 to be turned from the start of scanning a several points in one line; in line to the clock pulses supplied to it on sum-F i g. 4 shows a circuit for comparing mated values and when the preset digital digital values are reached. value emits a light button signal.

In Fig. 1, 1 denotes a display device, which The individual words that are from the main memory? is connected to a pulse center 2. The 35 of the process computer in the refresh memory display device 1 and the pulse center 2 can be transmitted in parallel part of a normal commercial industrial or serial in the input and output register 9 einfernsehanlage be. The camera of such a type can be written. From there they are in places The television system is replaced by a preset counter 3 pushed into the shift register 8, which is and an image repetition memory 4 which forms a ring memory from 40 and output register 9. To a Shift register 8, an input and output at least the dynamic shift register 8 consists of register 9 and an address counter 17 consists. Units in integrated MOS technology. Such Image repetition memory 4 and preselection counter 3 dynamic shift registers must always be with a are controlled by a clock generator 5. The minimum shift clock frequency can be controlled, otherwise Clock pulses are also transmitted to a coaster 6 45 lose their content. The number of stored, the horizontal and vertical deflected words is less than the line count of the visual frequency of the electron beam of the viewing device 1 image device 1, so that when the capacity of the ring spits and the pulse center 2 and the address memory would be the same as the stored information, counter 14 feeds. If the clock frequency is z. B. after output of the last word of a playback 8 MHz, then the shift clock frequency will be blocked by frequency division of the line cycle deflection frequency of 15 625 Hz and by dividing it would have to until the next picture is written. Ir Ratio the refresh rate of about 50 Hz this time the stored data could be lost. You will build the dividers so that you walk.

first divides by 512, then the horizontal To avoid this, is the capacity of the ring

deflection frequency and by dividing by 312 the 55 memory greater than required. The Be

To achieve refresh rate. rich, in which to that in Fig. 1 illustrated eyes

With 7 is the main memory of a process computer look data should be, is shown hatched

denotes in which series of measured values different The number of blanks can vary in size

Measuring points are stored. Should be the readings. The capacity of the ring buffer can, for. B. se

a certain measuring point are displayed, so large 60 are chosen that, if in each line de:

first the corresponding memory area of the display device would have to be displayed, ge

Process computer can be selected. This can be stored in just about any words. In the Usually with an operating instruction about this case, the ring buffer could with constant perform a control unit. Thereupon be controlled via clock frequency. The number of steps If the process computer carries the measured values from the Ar- 65 it can also be smaller; then must, if dii additional memory 7 to the input and output register 9 spaces through the input and output register 9 ge

of the refresh memory 4. This consists in being shifted, the clock frequency in the same ver

essentially from a shift register and content and ratio are reduced so that the circulation time de

Information in the ring memory is equal to the image period of the display device. It is useful for everyone to provide a shift register stage for empty memory space of a word. In this case it can to move the blanks through the input and output register 9, the horizontal deflection frequency as Shift clock frequency are used because this is close to the lower shift clock frequency. The change of direction the shift clock frequency causes the address control 17 by means of the AND gates 10 and 11.

With the aid of the timing diagrams shown in FIG. 2, the following is a circulation cycle explained in more detail.

After the electron beam of the viewing device 1 has drawn an image, it is guided back to the upper edge of the image, triggered by a synchronization pulse V of the reduction unit 6 entered in line α. The movement in line direction is synchronized with the pulses shown in line b , »o No measured value can be shown in the first lines of the picture because the electron beam needs several zen periods to get from the lower to the upper edge of the picture and during this time it is blanked is. During this time, blanks are pushed through the input and output register 9 at the horizontal deflection frequency. Line c shows the time course of the output signal of the address counter 17, which blocks the gate 11 and enables the gate 10. The shift clocks are therefore synchronous with the line frequency. During the first five pulses the input and output register 9 is loaded with data from the shift register 8. If the input and output register 9 no longer contains a blank, which can be determined from the counter reading of the address counter 17, then the content is transferred to the preset counter 3 and displayed on the display device 1. At the same time, the control signal for gates 10 and 11 changes, so that from now on the shift clock frequency is equal to the output frequency of generator 5. In the exemplary embodiment shown, a word has four places, so that the shift clock frequency is increased by a factor of four. If all the measured values are sent from the input and output register 9 to a preset counter 3 or a certain level of the address counter 17 is reached, the shift clock frequency is switched again and only one position per line is shifted. In line d of FIG. 2, the course of the shift clock pulses over time is shown. It is not necessary that the frequency of the shift clock pulses for shifting data from the shift register into the input and output register 9 is constant; a word can also be shifted into the input and output register 9 at a high frequency and then until one is inserted There is a longer pulse pause in the new word, provided that the pause does not fall below the lower clock frequency limit.

In the exemplary embodiment, for the sake of a clearer representation, it was assumed that a word only has four digits. In practice the words will have more digits, e.g. B. eight, so that a measured value can be displayed with greater accuracy, e.g. of at least 1%. With the industrial television systems the line period is 64 μ5 and the number of lines 312. The frame repetition time is therefore 312-64 µs. It follows that the shift clock frequency to move the data through the input and output register Vm-8 MHz = 125 kHz got to. So at least 256 x 8 clocks with 125 kHz are used for shifting, after which all stored values are output. Thereafter, the time must be until the beginning of the next output cycle be bridged. This time is 56 · 64μ5. Will If 56 spaces are selected in the ring memory, the shift at 125 kHz is followed by more 56 bars with a line frequency of 15.625 kHz. Because the lower Grenaire sequence for the shift clock pulses z. B. 10 kHz, the number of spaces can be reduced even further. For example, can they are 45. In this case the shift clock frequency is 12.5 kHz. In the exemplary embodiment is the capacity of the shift register +56 bits and that of the input and output register 8 bits. the end For control reasons, it may be more beneficial to increase the capacity of the shift register to +55 bits. In this case, 257 x 8 digits must be shifted with 125 kHz and 55 digits with 15.625 kHz will.

When loading the ring buffer, the data pending at the input and output register 9 are only saved when a certain status is reached, e.g. B. 5, the address counter 17, which was set to 0 with the frame sync pulse V , taken in parallel or serially. In general, the input and output register 9 is not controlled directly by the process computer, but via a buffer memory, which in turn is loaded upon request. After the first word has been stored, the other words can be taken over continuously until the intended locations of the shift registers 8 and 9 are filled, which in turn is indicated by the address counter 17. The data then circulate in the two shift registers in the manner described.

With the new process, the interlaced process used in commercially available televisions can be used to be kept. The locations of the ring memory are then not consecutively in sequence after occupied or called, but only the memory locations with an even number are used in one pass and on the other pass, only the address with the odd number is assigned or read. Appropriate it is here if the number of addresses as well as the number of lines of the screen image is odd, since then the next but one memory locations can be read continuously In this case, the shift clock frequency should not be be equal to the product of the number of digits in a word and the line frequency, but it should be equal to the Be the product of the line frequency and the double number of digits in a word. Curve-writing display device! should not only serve to represent certain measured values invariably, but it should also Similar to analog recorders, the latest measured value is displayed. After the main godfather this is achieved by deleting the oldest measured value after the arrival of a new measured value , all other measured values are shifted to one memory location and the new measured value is stored in the free first memory location is stored, s that after writing a new value in de Image repetition memory, what happens in equidistant line intervals, the curve shown in Ricr direction of the time axis is shifted. This means that not only past MeC

ΪΓ · Ο k »1 1 '

result, but also the latest measured values.

die MrfSE Tl · ^{hmer VO} T ^chla 8 ^en ' ^not

^jWelb " ^m f ^urech ° f '! Vrf π'" ^mod : ^fiz , ^ieren · ^{With the} oldest value you ch the il Γ ™ 1

the last word in this, then the register «is switched back to a ring memory, and there! ^{After deleting the oldest value} stored in it, register 9 is ready to accept new data.

A corresponding procedure can be used if the latest data is displayed in the last lines of an image ^{. In this case} , the data can

se £ r; insane

of the image repetition memory, the address modification can be achieved by counting a number of pulses with a very high counting frequency equal to the number of digits of a word in the address counter. In the described here _ao signed embodiment the counter only counts the number of words, so that it eenüet supplied to the address counter only an additional Impuh. This increases the addresses of the values stored in the filer by 1. The measured value that was saved for a short time is regarded as the most recent value until the next measured value is entered

Another method, in which the last word written in each case has the lowest address, consists in the shift register being changed by the length of a word during a cycle to write in a new word. There are two options for this, depending on whether the newest values are displayed in the first lines or in the last lines of a picture extended by the length of a word. This is shown in FIG. 1 by the connection, shown in dashed lines, from the shift register 9 to a shift register 18 and from this to the shift register 8. The shift register 18 is driven with the same clock pulses as the registers 8 and 9. Further, a switch S provided the ^ is actuated by the address counter 17th The input and output register 9 is controlled in such a way that new data are written before the most recent value. At the same time the switch S is thrown so that the newest data through the register 18 ^? _So overall be postponed. As a result, a cycle is lengthened by one line period, so that the addresses of the words stored in the registers are increased by 1 each time. After all the data have passed through register 18, switch S is flipped again so that register 9 is directly connected to register 8 again.

It is also possible to move to register 18. In this case the switch S is placed between the registers 8 and 9. The latest data is written into the input and output register 9 and stored there until the latest measured value so far occurs at the end of register 8 The content of register 9 is shifted to register 8. Run through at the same time

all other stored values are in register 9

• ent addressesShw'17 η 'κ ^Ta % ^nerat °' ⁵ 'ΐ. ^Γ u \ d ΐί Wr? 1/ . b "optionally the gates W

can. It can be done with that

diem

g several

f ^{are the} »* measured values in one each

^Vlde ° output signals of the previously different amplitude

^dsu f ^st f ^{uten curves also different} "V ^" ^{and I slightly differentiated} Vn wL, ™ ^{can be the} output signal

rsch ^ S »special cases, e.g. in

^ * ^ ¹¹ ^ ^{5 or in the} event of an alarm with? ^e 1 ^uenz ' * ■ B- 1 to 5 Hz, modulated L: f ^ ¹⁶ corresponding curve flashes and p ·? highlighting ^UBN 8 ^en curves.

mh ^{other type of} multi-curve display be _t * Μ ^Πη> . ^{that the} screen in several fields

^ m ,, ^U " ^{d Each field is assigned a diagram} " ^z - ^B · V? ^ebstelle ". For the measured values

dst "^ ί ^ ^{6 'Π Rin s} P ^eicher provided 8 All · ^gspei..' Ji ^ler 'aufen synchronously, but DIE ^Jen are' 8 ^en · ^the | adjacent curves zugeord -""Μ λ ^{Phase Shift} ° Ben. An area code is sufficient

-JfVT ^zeitmuIt ·? ^ To the different picture ^{how the} nolung memory can be connected. Advertising shown ^{in vie} r fields sol-η ^ r ^{V 'he curves}

w t ^{ach kind of} quadrant in the picture-

^ ^Cnirm are divided, it is the beginning of the ex-τ hi / h ^{6rSten 2} ^ ¹ * ⁵ preset counter with 1 × ^{Γ, the first} address of the first Bildwiederho-

^lu ° 85 ^s P ^eichers loaded, and a light button signal is generated in the above-^ "" flat manner. Because c - V ^lasenversc hiebung between the first ring-ς h, ^the expanses of "stored Z ¹² is ^d second ring memory" in the first ^^ Φ T is ⁰⁰⁰ I ^ g it ^d electron of ^{"m he} 's chart field. the second read out in the ™ - »Y ^{selection counter} , so that Ahu? * λ ^{a Hell} P ^u " kt is also generated. At the

with H 1 u, the ^next line is the preset counter Rin ■ u of ^the ™ * ^η storage space of the first ^ r ^ T ^ 8 ^eI a ^d en, and after the expiry of an entES *! "?? ^? ¹ ^ ^{0 the} electron beam heU- ™>1>"rv ^{e 'm transition} of the electron beam in the Z" y ^ia g ^ ^to "nfeld the preset counter to Inh ^ ^Rin gspeicher is connected with the _A" f a · f ^{6 "6" s} P ^e · While r; ih ^ ^{the two} curves in the upper half of the screen are displayed,

11 12

run the two associated with the lower curves through that achieved after each playback Ring buffer once to send without a signal. a predetermined number of pixels that are HeI the first two image repetition memories are switched over and that queried, the preset counter is sent to the third after playing a certain number of Image repetition memory connected, which 5 images the numbers of the lines with the light button The image points shown in the lower left part of the screen can be changed. Issued differently Curve is assigned. The two in the bottom means that the light and dark ones Half of the screen to be displayed curves th pixels are counted and that after the the relative starting point of the counter will then be used according to the two upper course changes generated. io is pushed. The number of lines is 312 and is

If the frame rate is a separate 50 Hz ring buffer for each series of measured values, then the Marcher and preset counters are available, so the marking can be divided so that eleven points each Curves shifted against each other and slightly with one - with medium brightness and the next eleven points to be compared to each other. For this purpose, you can write with full brightness. The counter, given comparison curves in the computer, the number of 15 with full and medium brightness and can be displayed if necessary. counts the points shown is free running. Begins

As in Fig. 3 is shown, the preselection is a curve with the first light-scanned image point, counter for the individual curves preferably through then after 312 lines the fourth point of a line is Replaces central counter 20, which is lighted with each character. The remaining seven points werlenimpuls as the start signal of clock pulses shown high at the beginning of the next curve, see above counts, when the final score is reached, that the line marking moves four points in the direction resets and the supply of further clock pulses of the curve request is shifted, d. i.e., the line locks, until a new start signal or the next marker moves along the curve to the curve return pulse appears. For each start to be represented, namely a piece moves at a picture aperture A circular memory 25 repetition frequency of 50 Hz and one image point is again provided for the series of measured values. Its output register 21 or 22 is number of 256 in about 1.3 seconds through the entire with the continuously scrolling counter 20 over a curve.

Comparator 23 or 24 linked, which is connected via a line. It is of course not necessary that with

device a 1 or a 2 emits a light button when the line marking the lengths of the

Counter reading and the content of the output register 30 and the lines described with middle

are the same. Because the counters from 0 to the final value brightness described are the same. For example

counts through, it can contain all the valences of data words - is it possible to highlight the dots in fifteen lines

record in one count. The number of letters and the visual features of the following six

The comparator and the output register can write any lines with medium brightness. In the-

be great. In this case, the line marking moves in 1.7 seconds

For each point to be compared there is a circuit from the beginning of the curve to the end of the curve. It is also provided that dash-dotted markings are also possible for a simple equivalent circuit, with and in the exemplary embodiment according to FIG. 4, for example, by writing eighteen points with full of three NAND gauges Nl, N 2 and N 3 and two brightness, the following five negation terms / 1 and / 2. The outputs 40 points with medium brightness, then three points of the equivalent circuits A1, A 2, / 4 3 ... are again combined with full brightness and again five via a coincidence gate U , at points with medium brightness. The signals for this whose output α a signal appears when the data words can easily be matched by a counter with identical data words. Decoding circuit can be obtained. In this case

If there are different curves 45 on the screen, a marking moves in 2.6 see over the image,

so they must, especially if they are The speed at which the marker is about

overlap, let distinguish. When the image wanders, it can also change who

It is often difficult to trace the points of intersection that with the image return pulse one or more

veins clearly a certain series of measured values rere pulses are additionally fed to the counter odei

assign. Every curve along its 5 ° must therefore be suppressed.

the entire line. Advantageous Instead of the wandering marking voi

the curves are represented by a different curve in black and white can Kurvei

intensity can also be identified in color in the manner of dotted or dashed lines. To do this,

or also marked with a dash-dotted line. Such ken the tax delivered by the raster counter

a fixed marking grid is often sufficient. B. of red au

ven to be distinguished from each other. Often, especially yellow, so that the red-yellow curve appears dashed

When the curves are viewed from a distance there is also the appearance of colored curves

such a marking is also not possible with the help of commercially available industrial television equipment

sufficient for a clear assignment in the case of kri- possible. For this purpose, the light button signals of the Vor

table curve intersections is reached. 60 counters simultaneously on three channels, and zwa

According to a further development of the invention, the code is supplied. Should z. B. the curves in six!

Recognition of the curves improved by displaying the different colors, so can

Marking is not fixed, but temporally different. The three basic colors in the (?) Code, the complements

changes, d. This means that the light-touched bars are displayed in a tärfarben in the (2> code. Become

Walk the curve along the curve. A curve can switch 65 light button signals to another channel

therefore not only by the line spacing, but z. B. when a setpoint is exceeded, so appear

due to the different speed, the corresponding part of the curve is recognized in a different color

will. This wandering of the marking is therefore preferably noticeable, e.g. B. red, is.

For this purpose 2 sheets of drawings

Claims (8)

Patent claims: 1. A method for displaying the course over time of a number of those available in digital form Measured values as a diagram on the screen of a display device, in which the measured values are stored in a refresh memory, from which they are cyclically fed to the display device and in the after When a new measured value arrives, the oldest measured value is deleted, all row measured values be shifted by one memory location and the new measured value in the free first Storage space is stored in which the electron beam line by line in the viewing device the screen is guided and the direction perpendicular to the line direction is the direction of the The time axis is, in which at the beginning of the scanning of each line a preset counter with the one in this one Line to be displayed and the value stored in the frame repetition memory is loaded, at the one while the electron beam is scanned lightly or darkly across the screen, the Preset counter clock pulses are supplied and when after reaching the preceding Pulse number the current strength of the electron beam is changed, according to patent 1 808 245, thereby characterized in that the number of measured values is smaller than the number of lines a display device (1) when using a shift register (8, 9) connected as a ring memory the number of stages with a lowest permissible shift clock frequency as the frame repetition memory of the shift register (8, 9) by a number of blanks greater than the number of digits of all measured values is selected and that the places containing the measured values with a Clock frequency, which is equal to the product of the line frequency and the number of digits in a word, and the vacancies with such a shift frequency above the lowest permissible shift frequency Clock frequency that the rotation frequency of the shift register is equal to the frame rate is to be shifted past the output point (9) of the shift register. 2. The method according to claim 1, characterized in that the blanks at the dispensing point at a frequency near the lower cutoff frequency will. 3. The method according to claim 2, characterized in that that the spaces with a clock frequency which is equal to the line frequency at the Output point of the shift register are pushed past. 4. A method for displaying the course over time of a number of those available in digital form Measured values as a diagram on the screen of a display device, in which the measured values are stored in a refresh memory, from which they are cyclically transmitted to the display device are supplied and the oldest in each case after the arrival of a new measured value Measured values is deleted, all other measured values are shifted to one memory location and the new measured value is stored in the first free memory location where in the display unit the electron beam is guided line by line across the screen and the direction is perpendicular to the line direction the direction of the time axis is at the beginning of the scanning of each line a preset counter with the one to be displayed in this line and stored in the image repetition memory Value is loaded at which, while the electron beam is light or dark-keyed runs across the screen, the preset counter clock pulses are fed and after When the preset number of pulses is reached, the current strength of the electron beam is changed, according to patent 1 808 245, characterized in that a. synchronous with the shift register (8, 9) Address counter (17) is switched on, which reads data from the memory and writes it new data controls, and that before or after the writing of new data, the length of the shift register is changed by the length of one word during a circulation cycle. 5. The method according to claim 4, characterized in that new data in a part (9) of the shift register (8) are written, which has the length of a word and to the Writing new data the shift register is changed during a circulation cycle. 6. The method according to claim 4 or 5, characterized in that the latest data in the first lines of the image are displayed and the shift register (8,9) by the length of a Word is extended during a circulation cycle. 7. The method according to claim 4 or 5, characterized in that the latest data in the last lines of the image are displayed and the shift register during a circulation cycle is shortened by the length of a word. 8. A method for displaying the course over time of a number of those available in digital form Measured values as a diagram on the screen of a display device, in which the measured values are stored in a refresh memory, from which they are cyclically fed to the display device and in the after When a new measured value arrives, the oldest measured value is deleted, all other measured values be shifted by one memory location and the new measured value in the free first Storage space is stored in which the electron beam line by line in the viewing device the screen is guided and the direction perpendicular to the line direction is the direction of the The time axis is, in which at the beginning of the scanning of each line a preset counter with the one in this one Line to be displayed and the value stored in the frame repetition memory is loaded, at the one while the electron beam is scanned lightly or darkly across the screen, the Preset counter clock pulses are supplied and when the preset number of pulses has been reached the current strength of the electron beam is changed, according to patent 1808 245, thereby characterized in that in each case after the mapping of a predetermined number of pixels Brightness of the pixels is switched and that after the reproduction of a certain number of images the pixels of other lines are light-scanned. ο Arrangement for carrying out the method according to claim 8, characterized in that a controller controlled by the line pulses is provided which, after a given number of clock pulses, control *. ' | _e fQ ₁ - the light key emits and the cyclically h counts to a number that is not in an integer n is related to the number of lines.
^S 10 A process for the representation of the time course of a series of eenden in digital form-Γ measured values as a diagram on the R ldschirm a vision device, in which the Meßrrte be gechert in a refresh memory from which they are cyclically the visual ^Spe 't zueeführt and in which (according to input Ten a new measured value of the oldest u is deleted ftwert, all other measured values are shifted by a space and Tr _fl new measured value in the free first Speicheri is stored i7, wherein in the vision device Tr electron beam line by line over the image -I rn is peführt and the direction perpendicular ⁵ Vr / rush towards the direction of the time axis, T- Smzu leg of the scan of each line, a preset counter Z which in this line darzustel-Τ Hen and in refresh memory overall ¹ h, _r .en value ee aden, in which, while ΤΓε »tS is lightly or darkly keyed I r the screen, the preset counter se is owed and with the after the preset impu Is number the angle of the electron beam is changed, patent 1808 245, characterized. for the representation of several curves the ίιί Her individual curves in each case one reaching the preset number of pulses the current strength of the electron beam is changed. As a refresh memory can basically all circular storage such as disk, drum 5 or runtime storage can be used. It can Shift registers can also be used. In general, a measured value is assigned to each line of the display device. The number of stored measured values is expediently not as large as the number of lines chosen. This is already useful because a larger one is displayed during the image reversal in viewers Number of lines is blanked. In the case of display devices whose number of lines cannot be changed, such as B. at the conventional display devices working according to the line raster method are therefore in a number of lines no analog values shown. When using shift registers with any lower, more permissible Shift clock frequency as a circulating memory, the capacity can be chosen just so large that the The measured values to be displayed can be saved. The measured values are obtained from the shift register output in such a way that after the image return pulse, the one stored in the first memory location of the slide controller Value is output and shown in one of the first 5 lines. On the next line the content of the next memory location is displayed and so on up to the last memory location of the Shift register. Then the shift clock pulses locked and only again after the pressure run pulse released so that the content of the first memory space is again in one of the first lines of the image