DE2135664A1 - Process for printing rasterized alphanumeric characters and graphic representations - Google Patents

Description

Process for printing rasterized alphanumeric characters and graphic representations

The invention relates to a method for printing rasterized alphanumeric characters and graphic 'Λ representations, such as curves, diagrams, schematics

i.a. The alphanumeric characters are serialized in a single by the character generator Line shown and transferred to a recording medium or intermediate recording medium.

There are printing processes for serial line-by-line Known to print alphanumeric characters. An output of graphic representations is with these printing methods possible if a coordinate value is assigned to each character position. According to that graphic structure to be printed is a character of the character stock of the after a in the pressure point such a method working printer mapped. This type of output is allowed because of the low Resolution of only large format printing of the simplest graphic structures.

209819/0303

Printing methods are also known to ^ the pressure alpanumerischer characters and graphical representations of satisfactory quality allow characterized ^ that the entire printing face dissolved into a plurality of grid points wirdj d "h" of both graphs and alpha numeric characters from raster lines, for example, point Odei ¹ Line shape composed. If the character print is to be carried out in good quality with this method ₂ , extensive memory formats are required for the character stock Blackening of practically every point of the print field is to be reported _o

Furthermore, a visual display unit known _s the next alphanumerischan sign the representation of curves and functions in rasterized form allows ₀ The function of this visual display unit, however, is indicate the presence of a cyclically operating video memory _§ in which are represented all other information to be printed. This type of representation is, in turn, unsuitable for printers that work in series ₀

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Another device enables the display of graphic information, such as letters or Line drawings by working with vectors as display sizes, which under different At angles to each other.

It is disadvantageous here that an intensity control is used to compensate for differences in brightness must pursue the beam. For serial display rasterized alphanumeric characters and graphic representations on a moving recording medium this device is also not suitable.

The purpose of the invention is to provide a simple process indicate the printing of alphanumeric characters and graphics in good Quality and high speed allowed.

The invention is therefore based on the object ^

to develop such a method that, when the recording medium is moving, both the serial Printing of alphanumeric characters as well as the quick output of graphic representations via a common Printing facility allowed, whereby the effort is not the same as for an alphanumeric serial printer significantly exceeds. The amount of data between a printer using this method and is to be transmitted to a computer controlling it,

should be low.

According to the invention the object is achieved in _s that a control unit are supplied signals in the form of digital words that, in the presence of a control command for alphanumeric notation, in a further method step, the detection of a character form storage unit trigger for the recovery of pressure pulses for a grid pattern shown alphanumeric characters, further, in the presence of a control command for graphic representations, an address comparator can be specified as the address for the respective curve point and trigger a print signal when the address is equal, the display for alphanumeric notation in the form of a character grid and for graphic representations in the form of a rasterized print line extending over the entire print width he follows.

The character line grid can be a character column grid as well as a character line grid be.

Bs has proven to be advantageous that the up? Drawing unit to compensate for the movement of the recording medium a vertical deflection voltage proportional to the horizontal deflection voltage is supplied.

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Another inventive feature of the solution is that the line clock generator and frequencies generated by the curve clock generator to each other such as

fα m. η

behave, being

f-r = line clock frequency,

f.t = curve cycle frequency,

k = number of grid lines per character, Έ = number of characters per print line, m = number of grid points per print line, η = number of print lines per line height

(Character height + character space) are.

It has been recognized as an advantage that when printing graphical representations, larger horizontal ones Extension only the start and end addresses of the f

lines to be written are transmitted to the printing device, a memory element being provided is that, prepared by a control signal, the write beam between the start and end address bright controls.

209819/0909

The gate parts of the invention are in universal applicability to both alphanumeric characters as well as for graphic representations with only insignificantly higher effort compared to only to search for alphanumeric serial printers.

The invention is to be explained in more detail below using an exemplary embodiment. In the accompanying drawing show:

Pig · 1ϊ a simplified block diagram of the Printer,

Fig. 2: the block diagram of an embodiment of the printer,

Fig. 3a: the resolution of the printing area in the case of drawing pressure according to the embodiment,

3b: the resolution of the printing area when printing graphic representations according to the exemplary embodiment,

3c: the resolution of the printing surface when printing characters according to another embodiment of the printer.

1 shows a simplified block diagram of the solution according to the invention. The signals are the Control unit 1 supplied in the form of digital words and decoded on control signals. The solution should for printing alphanumeric characters and for printing graphic representations two of each other

209819/0909 _. ₇ _

can realize different working modes. According to the determined control signals, the Character shape storage unit 2 or the unit for graphic representations 3 and the deflection unit controlled. The output of the character shape storage unit 2 or that of the unit for graphic representations 3 is used for light-dark control and the output signal of the deflection unit 7 of the deflection of the write beam of the recording unit

The recording takes place on the recording medium 8. ^ An embodiment of the solution according to the invention is shown in FIG. 2.

The input signals are decrypted for control signals in the control unit 11 with a buffer memory. If such are recognized, the corresponding sequential units are switched, for example the memory element 12, which stores the output mode character output or output of graphic representations, the memory element 13 _t that when outputting empty ^

lines is controlled, or the recording medium transport facility 83.

When drawing pressure, the otherwise dark-controlled shape storage tube 23 is light-controlled. The device-internal The character clock generated by the clock generator 90 is set in the stroke clock generator 91 in accordance with the resolution of a character field in k line clock pulses transformed per character clock pulse. During one

209819/0909 - 8 -

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Staielitaktes takes place Eis Eipp des Eippgenei = eto5? S 77ο whose output voltage is at the Auslsnksjstsa äer Po ^ aispeiciigrrohra 23 © ß. and causes acj: t the very * ©! = b®n a Sts? ieli © s on the picture view 23 a _o Aa d © a Intsehlüßlesii 21 § 22 lisgt the word with the information about the to be written aa _o Buroli the signal of the SniilüßleES 21 the line is scanned at a certain point on the screen 23 a® The line is mapped by the beam multiplication system 24 "siss system of lenses"; on the transparent character matrix 25 on a nontransparent background selects a multitude of characters from the total number of characters »From these, the character to be written is again selected j, indsa duscli daa Ausiigssigiial d © s Ent = Schltißl © i? s 22 one of the? In the SS? -Blook 26, secondary el © kt r onemrs r Ti © If ac hes ange sts ner- ΐ vjls d ₀ The character scanning tilt generator 27 causes the remaining k - 1 zvw. Character scanning fields belonging lines are written next to the first line and so the selected character is scanned in its entire area. The character shape analog signal amplified in the amplifier 5 is applied to the visual tube 61 as a brightness control signal. The current deflection on the writing tube 61 takes place synchronously with the standard memory deficiency by the voltage of the tilt generator 77 applied to the deflection system 61a. The clocks

09819/0909 _ ₉ "

of the stroke clock generator 91 are In the stroke counting register 73 and counted in the character count register 71, its content in Edgitai-Analog-Waiialei '74 in a analog signal is converted to the register content « In the generator 75 for the hearing is ont ale Ausienkspanming this becomes a signal for the deflection system 61 1> generated.

To compensate for the motion of the Aufseiohnungsträgers 80 is connected to the deflection oil ο one of Horizontalablenkspamiung proportional Tertifcalsb-1 applied relaxation _s in the generator? 6 for ei ". vertical articulation tension is generated «. The drawing is imaged from the screen 61d onto the recording medium 30 by the optical imaging system 62.

The recording medium 80 is removed from a storage device 81 and stored in an activation station 84. prepared for inscription «after writing, the recording medium passes through the development station 85, the fixing station 86 and the drying device 8th?. The transport is carried out by the transport device 82, which is via the synchronizing device 83 a and motor 83 b is driven. Furthermore, the recording medium 80 passes through a Separator 88.

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^& "*" - "It ^& ϊ ν *" f ^ P * ^ ß

I 135664

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Graphic when printing the st si lung en wii-d, the memory element vice steered 12. The digitally encoded address word is equally in the address comparator stored 31 and with the current address verglieh® £ i _o The current address nzählregisters 71 corresponds to the contents of the Zsioh © and- the Punktunterzählreglste2? S 72 _S in which the impulses of the KuTTentalctgenex-ators 92 are counted _o The content of both registers results after its implementation in the Digitsl-Analog-Waadler 74 analog siaa ZelchQüaruek the signal ζόσ Stsu @ riing d® ^ bsld @ ia generators 75 § 76 _{O at} the Drnok gr aphis α hot? Βει- · = istellungea Is the! Proportional! Tittsfairtoi? swlsohen Ysrtikal = and HorizontalablQakspanaimg correspond to the resolution of a pressure line In several pressure lines _p see also di © Pig® 3s and 3b ₉ other than with loan printing The Binsteli @ ii this © ® proportionality factor is carried out by sin rom storage element 12 outgoing control signals

Intsprleht the current © address of the Im Adressemrergleichss? 31 is the address _s so from. Adr-essenirergleicha ^ 31 an output signal emitted ^ the Im ümform @ 5? 4 buI the signal page of the form storage output is reshaped and analogously to this the writing tube 61 is brightly controlled

Is sin further Spsichei'eiament 32 the duration & © ϊ · unblanking determined ₀ What prepared by a control signal, the memory element 32, remains the

09819/0909 -11-

2135684

Brightness control until the current address and the read address are applied to the writing tube 61 until the next equality ycii.

During the printing of a blank cable, the storage element 13 blocks the control unit 11, the Character count register 71 counts the number of character clocks corresponding to a print line and controls the storage element 13 to. Likewise, for a recording medium transport commands the control unit is locked until the transport operation is completed. f

While transport operations and blank line printing are being carried out, the writing tube 61 is blanked by the amplifier. Fig. 3a shows the division of the printing area when printing characters. Each print line 93 is reproduced in a character column grid line 94. When graphic representations are recorded (FIG. 3b), the entire printing area 95 is subdivided into a plurality of screened M print lines 96 each extending over the entire writing width. The print lines 96 are written one at a time, one after the other. In a further embodiment according to FIG. 3c, for alphanumeric characters, the character areas 97 of each print line 93 are subdivided into a character line grid 98.

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The block diagram according to FIG. 2 is to be modified accordingly for this type of representation. From the comparison of FIGS. 3a and 3b with each other it can be seen that a control circuit for the Compensation of different brightness intensities with alphanumeric printing or output graphical representations can be dispensed with if for both working methods at the same time approximately the same areas are processed. The clock frequencies of the stroke clock generator 91 and the Curve clock generator 92 behave like this

m, n.

- 13 -

209819/0909

Claims (6)

Patent claims: 1. A method for serial, line-by-line printing of alphanumeric characters and graphic representations in raster form on a moving recording medium, characterized in that signals in the form of digital words are fed to a control unit (1) which, when a control command for alphanumeric notation is present, in another Method step querying a character shape memory unit (2) ((to generate pressure pulses for alphanumeric characters displayed in a grid-like manner, which, if a control command for graphic representations is present, are specified as the address for the respective curve point and, if the addresses are the same, an address comparator (31) trigger pressure signal, wherein the reproduction for alphanumeric notation in ■ * the form of a character stroke and raster is carried out for graphical representations in the form of a ι extending over the entire printing width rasterized print line (96). 2, method according to claim 1, characterized in, that as a character line grid a character column grid (94) is applied. -H-209819/0909 3. The method according to claim 1, characterized in that a character line grid is used as the character line grid (98) applies. 4. The method according to claim 1 and 2 or 3, characterized characterized in that the recording unit (6) for compensating for the movement of the recording medium a vertical deflection voltage proportional to the horizontal deflection voltage is supplied. 5. The method according to claim 1 to 4, characterized in that the line clock generator (91) and frequencies generated by the curve clock generator (92) to each other like f 2 m. η behave, where ft = stroke cycle frequency f _L = curve cycle frequency k = number of grid lines per character, M = number of characters per print line, m = number of raster points per print line, η = number of print lines per line height (character height + character space) are. - 15 - 209819/0909 " 6. The method according to claim 1 and 4 »characterized in that that when printing graphic representations of larger horizontal dimensions, only the initial and Bnd addresses of the lines to be written are transmitted to the printing device, with a Storage element (32) is provided which, prepared by a control signal, the write beam between the start and end address is highlighted. 209819/0909