DE3304859A1 - Circuit arrangement for inputting and optionally changing and correcting texts, characters, graphics and symbols and the like which can be represented on the display panel of a display device - Google Patents

Abstract

In connection with a circuit arrangement for inputting and optionally changing and correcting texts, characters, graphics and symbols and the like (character signals), which can be represented on a display panel of a display device, the screen of a monitor or of a television set, in colour or in black/white, a keyboard is used, to the keys of which are allocated characters, symbols, commands or the like, and when these keys are operated, the character signals and/or commands are output. To be able to use the keyboard in several ways, a change-over switch is provided and when this switch is operated, certain memory areas of a coding memory are activated and different functions are allocated to the keys of the input keyboard. In order to be able to produce, in connection with displaying videotex, a keyboard which enables a multiplicity of special characters, colours and other deviations to be input into the running text, it is proposed to provide the keyboard with one or a number of function switches and to allocate a corresponding number of storage areas to the coding memory and to use an editing circuit in conjunction with a videotex decoder in order to enable all desired character variations to be displayed by means of a few function switching keys. The operating functions in each case possible when a change-over key is operated are shown in an additional display line in the visual display so that the operator ... Original abstract incomplete.

Description

Circuit arrangement for entering and optionally changing

and correcting texts, characters, graphics and symbols and the like, which can be displayed on the display panel of a display device. The invention relates a circuit arrangement for entering and optionally changing and correcting Texts, characters, graphics and symbols and the like.

(Character signals) that appear on the display panel of a display device, the Screen of a monitor or a television receiver, color or black / can be displayed in white, according to the preamble of claim 1.

From DE-AS 26 52 407 a special circuit arrangement for Entering code signals for characters, symbols, commands or the like in a data processing system, especially in display device controls, with a keyboard, the keys of which are characters, Symbols, commands and the like. Associated, known, when actuated, the character signals are issued, in connection with an interrogation device, which the switch positions of the keys cyclically querying one after the other and when querying an actuated key an area of a code memory which is assigned to this key and which stores character signals calls. To the number of keys in such a keyboard in terms of circuitry Respect not to have to expand according to all requirements and thus a To ensure a clear and easy-to-use keyboard is a shift key provided, with the output signal of the coding memory is controlled such that in the non-actuated state, the key interrogation device, the cells of a first Memory area and, in the actuated state, the cells of a second memory area call. The coding memory is part of the keyboard, its individual memory information corresponding to the control via a control unit in an output unit for a Display device are output.

From DE-OS 29 30 374 a freely programmable keypad arrangement is also known for a screen terminal, in which the keys in different functional states of the terminal have a different meaning. The respective meaning given by the dynamic assignment of a control key is given by an alphanumeric Display shown in the immediate vicinity of the key outside the screen terminal. In principle, however, a selection is known in computer-controlled systems of alternatively permissible operations by dynamically assigning a function a control button by displaying this function on a data display terminal. This has the disadvantage that the screen is not without restriction for logging e.g. of process parameters is available. Non-process programs, e.g. compilers, Assemblers are not permitted during the period in which the service is offered.

Furthermore, from DE-AS 28 32 673 a keypad coding system with a plurality of keys containing keypad known in which the contacts the keys are arranged in a matrix and with a circuit for successive Interrogating the contacts cooperate to determine an actuation state of a button and to generate corresponding output signals when a key is pressed, which an encoder is supplied, which corresponds to an actuated key emits coded output signal.

A number of customer-programmable keys are provided as well as further shift keys to correspond to those of a pressed control key Switch data from lowercase to uppercase letters, with the shift key to the character is pressed for a shift operation to begin while the shift key is pressed is pressed to indicate that the toggle operation has ended. This one However, the shift keys used do not serve to replace the normally present to assign other correspondence to alphanumeric keyboards. Even the freely programmable ones Keys only allow a certain functional sequence, but not a switchover Correspondence assigned to the individual keys of the alphanumeric keyboard.

On the basis of this prior art, the object of the invention is to be found based on a circuit arrangement for entering code signals for characters, symbols, Commands or the like in connection with a monitor with a series of toggle keys provide a switchover of the alphanumeric input keyboard to different Correspondence allows in order for the extensive operation in connection with modern text transmission systems can be used. The inside of a Function selectable possible operations as well as those assigned to the keys by the Correspondence that is dependent on the toggle function should also be displayed.

The object is achieved according to the invention through the use of such Keyboard in connection with a screen text decoder according to the teaching of the patent claim 1 solved.

Advantageous further developments of the invention are set out in the subclaims described.

The essence of the invention consists in an alphanumeric keyboard With additional buttons to switch to different functions and to assign different ones Correspondence to the alphanumeric keys, with the individual correspondence converted and displayed in character encodings that can be processed by the video text decoder should be used in conjunction with a video text decoder that is suitable is to increase the character signals transmitted according to modern communication systems received, decoded and displayed on the screen. Be exemplary here mentions videotext, teletext, teledon, prestel, etc. This is how it should be It may be possible to individually select a text page received online with the appropriate Change, correct and add to keyboard entries. In #dialogue it should also be possible to send corresponding information to the screen text center and output to the correspondent. Examples include bank transfers, Ordering of goods, transmission of technical and graphic data.

Usually you can only use an alphanumeric keyboard Enter the common characters and numbers on the screen as they are are assigned to the individual keyboards. For the Further Representation of additional characters, e.g. currency symbols, Greek alphabet, special characters according to Cept standard and the like., It is necessary to provide additional buttons, what is avoided by the invention. With just a few additional buttons for switching functions any representations of characters, symbols, Graphics also possible. When the toggle button is pressed, a microprocessor control unit the correspondences belonging to this function to the keys of the alphanumeric Assigned to keyboard. When pressing the individual keys of the alphanumeric keyboard the corresponding display information is stored in a coding memory via an editor supplied in a code processed by this, its memory areas accordingly activated by pressing the function control key. The ones that can be called up from the coding memory Codings are stored and each individual special character or Assigned to attribute. They are controlled via the editor when the buttons are pressed read out and output to the screen text decoder. It is a preprogrammed read-only memory. According to the incoming information will be the individual codings of the memory areas are read out and, since these of the coding of the received character signals via the receiving part of the video text decoder read into the page memory of the BTX decoder. So that the operator takes care of the correspondence when pressing the function keys can recognize the individual keys of the alphanumeric Assigned keyboard, the invention provides that according to the teaching of the Claim 2 in one or more additional strings of characters the The type of function, the toggle function and the assigned correspondence are displayed will. For example, it is possible to use the character key in the alphanumeric keyboard A different correspondences when the corresponding function keys are pressed to be assigned, e.g. the character alpha of the Greek alphabet as a special character. These characters and the assignment to the individual switching functions must be entered in the Memory areas of the coding memory can be entered in a preprogrammed manner. The memory locations are only activated by the control and the corresponding Codes output.

With the help of a position indicator on the screen, which can be activated by pressing corresponding function control keys on the alphanumeric keyboard both in vertical as well as horizontal direction on the screen from character space to Character space can be moved, it is possible to control each character individually and, since the corresponding character storage locations of the character memory are controlled via this control of the on-screen text decoder are activated by entering other characters or to delete the contents of the memory location. For the presentation of individually on detachable and colored characters, when displaying so-called DRCS characters, it is convenient to use a cursor that uses it in conjunction with a point-oriented Storage of the character information in a point memory for the display of the screen text allows you to go to each individual point in order to save the corresponding storage space of the point memory to be able to activate. This means that each point is individual corresponding the saved options can be changed. When playing different or Changed foreground and background colors become the individual points assigned attributes in the attribute memory of the video text decoder i, content-wise changed. In an expedient further development of the invention is according to claim 7 provided that the basic color components of the respective character color attribute as Color value are displayed. Deviating from the intensity levels can thus be within the basic colors vary in many ways both for the individual points as well as for character and background information. The corresponding Storage locations or storage areas of the coding memory are used for this form of representation also activated and when the corresponding code signals are output, the corresponding Storage locations of the attribute memory occupied with new information. Appropriate is a step-by-step counting circuit in the editor with which the individual Color gradations can be achieved.

Based on the drawing, an exemplary embodiment of the Invention described in more detail.

In the drawing, an input keyboard 1 is shown, the one Has alpha keyboard 2 and a numeric keyboard 3. The numeric keyboard 3 is usually used to connect to the Establish central computer of the Federal Post Office over the telephone network. Besides that, you can but also arithmetic operations and various other numerical ones Input functions can be controlled with. In addition, the keyboard 1 has function switchover keys 4 labeled A - H that allow the keys of the alphanumeric Allocate very specific correspondences in the preprogrammed keyboard Coding memory 6 can be called up via an editor 5. When you press a Key of the alphanumeric keyboard 2,3 are the coded information about a keyboard table 7 and arranged via a microprocessor control unit 8 to the Editor output. The microprocessor used is a those of the type 8048. From editor 5, which is known to assign the individual Memory locations of the coding memory 6 based on the incoming information, are activated by pressing the function control buttons 4, which are marked in detail with A to H are designated, the memory locations are activated and their memory contents when actuated of the keys of the alphanumeric keyboard are coded and output to the BTX decoder. For normal operation it is necessary that one of the shift keys 4, e.g. at button A, is pressed in the alphanumeric display. For the alphanumeric Input is sufficient information with a 2-byte diacritical mark and for control functions 3 bytes. The keyboard table shifts the byte information over the microprocessor 8 controlled from, which at the same time also the keys of the keyboard 1 in detail cyclically asks if the code is not output when actuated. The corresponding Control line is shown in phantom. With the actuation of the switch 4 is not only the assigned memory area of the coding memory 6 via the Editor activated, but also via a not shown, the Editor also assignable character generator the additional information about the actuated function control key and those assigned to the alphanumeric keys Correspondences to the microprocessor control unit 9 of the video text decoder submitted. The microprocessor control unit 9 receives the incoming via the input 10 Video text signals from the telephone network and stores them page by page in a page memory 11 from. The individual pieces of information on the side are queried by the control unit 9 and compared with the character information contained in the character ROM 12 and output point by point, with the individual assigned to each point on the screen Information is stored in the character memory 13 in a point-oriented manner and the associated Attributes, such as the background and foreground colors, in an attribute store 14 can be stored.

Since the from the coding memory 6 by the editor 5 is also in the ASC II code output characters identical in coding to the incoming characters of the on-screen text, this information can be processed directly. The control unit 9 ensures that the information when a shift key is pressed 5 initially as additional line information in the point-oriented character memory stored with the assigned attributes in the attribute memory 14 and via a Control unit 15 for displaying the text on a monitor 16 is also read out will. The timing of writing and reading is done via the control unit 9, for the display via the control unit 15, which are synchronized with one another are. The connecting lines shown in dashed lines should be the represent dependent synchronization of the control units. In the embodiment the editor with its coding memory 6 is assigned to the video text decoder. As the microprocessor for the microprocessor control unit 9, for example, of the type 8031 can be used. From the keyboard 1, when the corresponding keys are pressed the alphanumeric keyboard given certain commands that are also used for control of the on-screen text decoder. E.g. the connection to the telephone network of the Germans Bundespost, picking up the page content or pushing out saved Page storage, page content via output 17 to the data center that is connected or a BTX decoder or computer connected via the data center of a correspondent. The command output is known per se. The difference compared to the acquaintance, the shift keys 4 change the alphanumeric Keyboard 2 and 3 switched for very specific functions and the corresponding ones Correspondence assigned to the keys of the alphanumeric keyboard in the additional data line 18 is shown on the monitor 16. The operator can based on the data given here when pressing the alphanumeric keyboard the corresponding corresponding characters in the position selected by the cursor register, delete entire lines and the like.

In the specific example it should be assumed that the key A the Function "Normal", key B the function "Special characters", key C mosaic, the button D Smooth, the button E "Line", the - Key F ~ DRCS character ", the key G color and Flash "and the key H Display are assigned. Other keys can e.g. be provided for ~ Area ", Full Screen", -Full Row ", Color Definition" and the like be. The finished embodiment depends on the extent to which the coding memory of the Editor is programmed or programmable accordingly. In him they have to Memory areas assigned to function keys must be preprogrammed so that upon arrival of the corresponding function commands the memory areas are activated and at The assigned bit information arrives on the alphanumeric keyboard Correspondences are pushed out as coding information. Control of the editor is also carried out by the microprocessor of the control unit 9.

- L e r s e i t e -

Claims (7)

-Patent claims 1. Circuit arrangement for inputting and optional Changing and correcting texts, characters, graphics and symbols and the like (character signals), those on the display panel of a display device, the screen of a monitor or a television receiver, can be displayed in color and / or black / white, with a keyboard, the keys of which are assigned characters, symbols, commands or the like, when activated, the character signals and / or commands are issued, and with a coding memory with several memory areas in connection with a shift key, when actuated, the coding memory is controlled in such a way that in the non-actuated State the cells of a first memory area and in the actuated state the Cells of a further memory area are called, g e k e n n n z e i c h n e t d u r c h use in connection with a device for receiving and Decoding and presentation of text information, which according to certain standards, such as on-screen text, Prestel, Teledon etc., are transmitted and in a readable Page memory page by page and controlled by a microprocessor control unit line by line can be read out and displayed, each address being assigned a location on the screen is and the signs associated attributes in an attribute memory that can be read from which character and attribute contents are stored by means of a video signal generation circuit can be displayed on the screen with a certain number of lines, and using an editor with a non-volatile coding memory, its memory areas can be called up using the shift keys. 2. Circuit arrangement according to claim 1, characterized in that when pressing a shift key in at least one other line of characters the Output signals assigned to the shift key, such as special characters, attributes, definitors and freely selectable attributes as well as the keys assigned to the correspondence and the keys to be entered Commands are displayed that can be entered into the non-volatile readable coding memory and that both the keys activated by pressing the shift key the alphanumeric keyboard and its correspondence as well as the corresponding associated memory areas of the non-volatile coding memory are activated, and that when the keys on the alphanumeric keyboard are pressed, those with the characters Corresponding coding as shown in the additional line selectable options from the coding memory via the editor to the screen text decoder input output and can be displayed at any preselected positions in the page display or can be blended. 3 circuit arrangement according to claim 2, characterized in that the codes corresponding to the characters in the page memory of the video text decoder can be read in. 4. Circuit arrangement according to claim 2 in connection with a video text decoder, which has a memory with point-oriented storage of the character information, characterized in that individually addressed point-organized storage locations or storage locations combined into characters by coding when actuated the corresponding keys of the alphanumeric keyboard interchangeable or their Memory contents are changeable. 5. Circuit arrangement according to one of the preceding claims in Connection to a in both horizontal and vertical directions on the Screen by pressing the corresponding function keys on the keyboard on each Character space of the displayed text movable position indicator (cursor), its respective position the corresponding address in the character memory or activated the point memory of the screen text decoder, which character information erasable or by a new one using the input keyboard via the coding memory inscribed is replaceable, characterized in that the position indicator Activated memory location of the character memory when pressing a key of the alphanumeric Keyboard according to the assigned correspondences from the coding memory The coding output via the editor is assigned. 6. Circuit arrangement according to claim 4 in conjunction with a position indicator that can be moved on the screen for each display point of the screen text, characterized in that the cursor points to any point of the Screen text can be moved on the screen and according to the actuation the corresponding function switchover key in the additional display line indicated possibilities by the output of the corresponding correspondence is changed when the keys on the alphanumeric keyboard are pressed, by replacing the point-related memory content with coding from the coding memory with the corresponding foreground and background colors in an attribute memory of the on-screen text decoder remain unchanged or be changed without the information contained in the page memory can be changed. 7. Circuit arrangement according to claim 6 in connection with the different Design of the foreground and background colors of the characters and symbols shown, characterized in that the foreground colors in the additional information line and their color components are displayed according to the current status and next to it the correspondence for changing the individual basic colors is shown, and that when the keys corresponding to the basic colors are pressed, when the corresponding keys are pressed Changeover to the corresponding functional mode, the color values of the displayed Proportional values can be changed step-by-step within specified limits, with the respective color mixing ratio is displayed and its change can be freely entered.