US3648272A - Arrangement for proportioning actively or passively light-radiating surfaces - Google Patents

Arrangement for proportioning actively or passively light-radiating surfaces Download PDF

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Publication number
US3648272A
US3648272A US20371A US3648272DA US3648272A US 3648272 A US3648272 A US 3648272A US 20371 A US20371 A US 20371A US 3648272D A US3648272D A US 3648272DA US 3648272 A US3648272 A US 3648272A
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United States
Prior art keywords
stage
counter
arrangement
character
picture
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Expired - Lifetime
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US20371A
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English (en)
Inventor
Jurgen Schroder
Hans Georg Nussbaum
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US Philips Corp
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US Philips Corp
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/08—Cursor circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/14—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam tracing a pattern independent of the information to be displayed, this latter determining the parts of the pattern rendered respectively visible and invisible
    • G09G1/143—Circuits for displaying horizontal and vertical lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/30—Control of display attribute

Definitions

  • ABSTRACT An arrangement for displaying characters or symbols on a screen of a display device where characters selected by comparing a predetermined area of the displays stored in a memory with a counter circuit controlled by a column counter, a character counter, a scan line counter and a reading line counter inverts the selected characters in an inverter stage connected between a character generator and the displaydevice.
  • the invention relates to an arrangement for proportioning actively or passively light-radiating surfaces by means of adjustable superpositions and variations in brightness on these surfaces on which characters or symbols are periodically produced with the aid of a control stage by means of control signals for a character generator which control signals can be read out from a store and counted by column, character, scanning line and reading line counters, which generator provides modulation voltages as character control signals for the purpose of causing the light-radiating surfaces to light up.
  • An object of the present invention is to accentuate areas which are permanently adjustable or are chosen by control information on the light-radiating surfaces by means of a given brightness in contrast with the other areas having symbols.
  • the means generating the active or passive light is driven line by line or column by column over the overall range of the light-radiatingsurface upon which the symbols, characters or figures must be displayed.
  • the information to be displayed is used as a picture signal for the control of the intensity of the means producing the light radiation.
  • the symbols accentuated in the picture areas may be inverted automatically into their brightness intensity, that is to say, generally dark picture dots serving for the display can be inverted into bright picture dots and bright picture dots can be inverted into dark picture dots.
  • toinsert permanently strips or lines accentuated by adifferent brightness between characters arranged in lines so that a horizontal division of the overall picture is obtained for thepurpose of better readability.
  • a picture impression which is pleasant to the eye can be obtained by means of a slight increase of the brightness of the overall picture background which appears as a weak grey background. This is effected in a simple manner by the addition of a constant signal to the picture signal.
  • the screen of a cathode-ray tube is used as the actively lightradiating surface and the electron beam of a cathode-ray tube is used as the means causing the light radiation (light conduction).
  • FIGS. 1-7 of the drawings in order to show the possibilities of proportioning the picture according to the invention.
  • FIG. 8 shows a block diagram of an arrangement with the aid of which characters and symbols can be displayed on the picture screen of a cathode-ray tube while FIGS. 9-13 show embodiments of the invention which, added to the arrangement according to FIG. 8, permit the display of the proportioned pictures.
  • a cursor marks the position where symbols or characters supplied by the viewer, for example, through a keyboard are to be written on the picture screen.v
  • the position which is marked by the cursor is a particular picture position to be characterized because changes in the picture content take place in this position. This position should be marked as clearly as possible; marking must, however, not detrimentally influence the readability of a character reproduced in this position.
  • FIGS. 1-3 show how the cursor clearly and simply marks the position by means of inversion of the picture signal. In FIG. 1 a blank position is marked and in FIGS.
  • FIGS. 1 and 2 show black writing on a white background
  • FIG. 3 shows white writing on a black background.
  • the separate characters are displayed by a raster of seven horizontal and eight vertical picture dots.
  • a changeover from red to black writing is effected, for example, in a teleprinter exchange so that, for example, the manually fed and transmitted data can be displayed black and white and the data transmitted by the data-processing arrangement can be displayed red on white.
  • the invention makes a different display possible in a corresponding manner. Received information is displayed for example white on black while the information originating from the user appears black on white through the supply station. In FIG. 4 the third line is displayed in white writing on a-black background, the other lines are displayed in black writing on a white background.
  • VERTICAL LINES Vertical lines can be drawn throughout the picture height by means of inversion of the picture signal for the duration of one or more picture dot widths. This makes it possibleto display particularly tabulated additions in a convenient manner. These are efficiently made narrower than the horizontal interspace between two characters (for example, one picture dot width) so that the picture content is not disturbed.
  • the vertical lines may be used as markers for tabulator positions, for example, when activating the tabulator function by means of a special button in the supply keyboard the cursor C moves behind the position of the next vertical straight line.
  • FIG. 5 shows how such a tabulator marking becomes apparent. In white/black picture areas the vertical line V would automatically appear as a white line on a black background.
  • HORIZONTAL LINES By inverting the picture signal during the period of the beam covering the picture in a horizontal interspace the line above the space can be underlined (H). In this manner titles can be accentuated. Tables subdivided or lines which are to be fed into the data-processing arrangement can be marked. This possibility is shown in FIG. 6.
  • a control signal BAS (composed of a picture signal B, a blanking signal A and a synchronizing signal S) is produced for a TV-monitor TV functioning in accordance with a television standard.
  • a counter circuit comprising a column counter SpZ, a character counter ZchZ, a scanning line counter L2 and a reading line counter ZIZ is controlled by a clock signal generator TO.
  • the column counter SpZ controls the columns of the raster in the picture field for the display of a character
  • the character counter ZchZ controls the position of the characters in a reading line
  • the scanning line counter LZ controls the separate scanned lines in a character (horizontal scanning paths of the electron beam)
  • the reading line counter ZIZ determines the reading lines in the overall field of display.
  • This counter circuit controls a blanking stage A, a synchronizing stage Sy and a control stage St.
  • the stage A produces the picture blanking pulses and the stage Sy produces the synchronizing pulses while the control stage Sr, which is likewise coupled to the clock-signal generator TG, controls a memory Sp and a character generator ZG coupled thereto.
  • the picture signal B that is to say, the character control signal from the character generator ZG is applied through an inverter stage CI, which is active or not active in accordance with the user's choice, to an input of a gate D to a second input of which the blanking signal A is applied.
  • the inverter stage CI serves for generating a cursor, a conspicuous picture area, horizontal or vertical straight lines and for varying the picture background.
  • the combined picture-blanking signal (BA) and the synchronizing signal (S) are combined in a mixer stage M to form a picture-blanking-synchronizing signal (BAS).
  • the characters to be displayed are kept available in the memory Sp.
  • Information is exchanged between memory Sp and a dataprocessing arrangement through the line E/A while the user can vary the picture content through a keyboard Ta and a lead T.
  • the characters coded with minimum redundance in the memory Sp are converted into a picture signal B by the character generator ZG which for this purpose supplies the corresponding modulation voltage for the electron beam in the monitor TV.
  • FIG. 9 shows the block diagram for the generation of a cursor.
  • the positions of cursor counters ZCl and ZC2 which positions can be chosen manually through the keyboard Ta (denoted by key-contacts Cl and C2) are compared in two comparison arrangements VC] and VC2 with the positions of the character counter ZchZ and the reading line counter ZIZ.
  • a signal is applied through an AND-gate U to a cursor control stage CS1.
  • the vertical dimension of the cursor on the picture screen is limited by the scanning line counter LZ at the character height plus, for example, one line above and below the character.
  • the cursor control stage CS! controls the inverter stage CI which inverts the picture signal B provided by the character generator ZG (FIG. 8) for the fixed d uration by means of switching on this inverter stage CI(B or B).
  • FIG. 10 shows the structure of the different components in details.
  • the gate 4 thus marks the column
  • the gate 5 marks the reading line
  • a NAND-gate 11 connected through two inverters 9 and 10 to the outputs of the gates 4 and 5 marks the position where the cursor is displayed on the picture screen.
  • the width of the cursor is equal to the width of the character which is normally to be displayed plus every time half a horizontal interspace in front of and behind the character.
  • the height of the cursor is deten'nined by the control stage CS!
  • the gate 11 is connected through an inverter 12 to a NAND-gate 15 to a different input of which the line counter L2 is connected through an SR flip-flop (Set- Reset flip-flop, i.e., bistable multivibrator) formed by NAND- gates 13 and 14 so that the cursor is limited to the desired number of scanning lines.
  • the NAND-gate 15 is connected directly and through an inverter 17 to NAND-gates l9 and 18, respectively in the inverter stage CI.
  • the picture signal B is applied through an inverter 16 and directly to the gates 18 and 19, respectively the outputs of which are connected to the inputs of a NAND-gate 20.
  • the inverter stage Cl controls the picture signal B in such a manner that it arrives at the mixer stage M during the normal picture display through the gates 19, 20 and hence in noninverted form (B), whereas it is inverted (B) through the gates l6, 18, 20 for the period of the display of the cursor.
  • FIG. 11 shows an arrangement by which arbitrary picture areas can be inverted.
  • the counters ZchZ, LZ and ZIZ correspond to those of FIG. 8.
  • the character counter ZchZ is connected to a decoder D1 which is also connected to the control stage St.
  • the scanning line counter LZ and the reading line counter ZIZ are connected to a decoder D2 which is likewise connected to the control stage St.
  • the counters influence the decoders D1, D2 in such a manner that the commencement and the end of the inversion range for the horizontal (ah and eh, respectively) and vertical (av and ev, respectively) directions are fixed by the control stage St.
  • FIG. 12 shows an arrangement for generating horizontal or vertical straight lines on the picture screen.
  • the operation corresponds in principle to that of the circuit arrangement according to FIG. 11. In this case, however, there are no SR flipflops necessary since only one TV reading line and the raster dots of a column of the raster are inverted.
  • the column counter SpZ and the character counter ZchZ are connected to a column decoder DSP, the decoder being denoted by DZ for the counters L2 and ZlZ.
  • the column decoder DSP and the reading line decoder DZ act on an inverter stage, correspond ing to Cl of FIG. through an OR-gate 26.
  • FIG. 13 shows an example of the mixture stage M (see FIG. 8) which is extended in such a manner that a grey control stage G makes a dark picture background lighter and a light background darker.
  • the synchronizing signal S controls a transistor T
  • the picture suppression signal BA controls a transistor T
  • the emitter electrode of transistor T is connected directly to ground while that of transistor T is connected to ground through a variable resistor P parallel to a collector-emitter circuit of a transistor T in series with a resistor R
  • the collector electrodes of the transistors T and T and of a transistor T, whose emitter electrode is connected to ground through a variable resistor P are connected through a resistor R, to a terminal conveying the voltage +V and are in that case coupled to the monitor TV.
  • the base electrodes of the transistors T and T are coupled to the grey control stage G.
  • the black level is fixed by the resistor R when transistor T conducts.
  • a control input g must receive a l signal from the control stage St in case of black writing on a light background and a 0 signal in case of light writing on a dark background.
  • the control input g is connected directly and through an inverter 27 to NAND-gates 28 and 29, respectively.
  • the other inputs of the gates 28 and 29 are connected to the output of an SR flip-flop formed from NAND gates the inputs of which are connected to the leads a and e.
  • the output of the gate 29 leads to the transistor T while that of gate 28 leads to transistor T through an inverter 30.
  • An arrangement for displaying characters or symbols on a screen of a display device which arrangement comprises a clock-signal generator, a counter circuit connected to said generator, a control stage which is connected to said generator, said counter circuit and a character or symbol memory, outputs of said control stage and said memory connected on a character generator having an output for periodically supplying modulation voltages corresponding to the characters or symbols of the memory to the display device, the arrangement further comprising a stage for accentuating characters or symbols on the screen, characterized in that the said stage for accentuating characters or symbols comprises an inverter stage (Cl) which is connected between the character generator (ZG) and the display device (TV) and which inverter stage (Cl) is connected so as to be controlled to the said counter circuit which comprises a column counter (SpZ), a character counter (ZchZ), a scanning line counter (L2) and a reading line counter (ZIZ) 2.
  • the said counter circuit which comprises a column counter (SpZ), a character counter (ZchZ), a scanning line counter (
  • the display device comprises a television picture tube which is connected to the output of a mixer stage (M), which mixer stage (M) is connected to a blanking stage (A) and to a synchronizing stage (Sy), which are controlled by the counter circuit, and to the character generator (ZG) through the inverter stage (Cl).
  • the cursor control stage comprises a bistable multivibrator (13, 14) which is controlled by the scanning line counter (LZ), the output of said multivibrator being coupled through a NAND gate (15) to the output of the comparison arrangements (VCl, VC2).
  • comparison arrangements comprise successively connected NAND gates (l to 10) which are connected together through a further NAND gate (11).
US20371A 1969-03-22 1970-03-17 Arrangement for proportioning actively or passively light-radiating surfaces Expired - Lifetime US3648272A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1914764A DE1914764B2 (de) 1969-03-22 1969-03-22 Schaltungsanordnung zur Formatge staltung der Darstellung von Symbolen auf lichtausstrahlenden Flachen

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US (1) US3648272A (de)
AT (1) AT306408B (de)
BR (1) BR7017659D0 (de)
CH (1) CH531222A (de)
DE (1) DE1914764B2 (de)
DK (1) DK126883B (de)
ES (1) ES377728A1 (de)
FR (1) FR2039695A5 (de)
GB (1) GB1309698A (de)
NL (1) NL7003897A (de)
NO (1) NO126191B (de)
SE (1) SE357635B (de)
YU (1) YU32574B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868673A (en) * 1973-08-14 1975-02-25 Teletype Corp Display apparatus including character enhancement
US3895374A (en) * 1974-09-03 1975-07-15 Gte Information Syst Inc Display apparatus with selective test formatting
US3895375A (en) * 1974-09-03 1975-07-15 Gte Information Syst Inc Display apparatus with facility for underlining and striking out characters
US3896428A (en) * 1974-09-03 1975-07-22 Gte Information Syst Inc Display apparatus with selective character width multiplication
US3918039A (en) * 1974-11-07 1975-11-04 Rca Corp High-resolution digital generator of graphic symbols with edging
US3974494A (en) * 1975-01-16 1976-08-10 Mitsubishi Denki Kabushiki Kaisha Character display apparatus for providing a viewing frame for a data input area
US4146879A (en) * 1977-04-12 1979-03-27 International Business Machines Corporation Visual display with column separators
US4267548A (en) * 1977-12-23 1981-05-12 Fuji Photo Film Co., Ltd. Format-information synthesizing system
US4310839A (en) * 1979-11-23 1982-01-12 Raytheon Company Interactive display system with touch data entry
EP0051291A2 (de) * 1980-10-31 1982-05-12 Kabushiki Kaisha Toshiba System zum Ordnen von Dokumenten

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3223482A1 (de) * 1982-06-23 1984-01-12 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum veraendern von auf dem bildschirm eines sichtgeraetes dargestellten figuren
JPS6061794A (ja) * 1983-09-14 1985-04-09 シャープ株式会社 画面分割表示装置
DE3425568A1 (de) * 1984-07-11 1986-01-16 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum pruefen elektronischer flachbaugruppen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292154A (en) * 1962-11-29 1966-12-13 Lab For Electronics Inc Display apparatus
US3346853A (en) * 1964-03-02 1967-10-10 Bunker Ramo Control/display apparatus
US3432846A (en) * 1965-04-19 1969-03-11 Gen Electric Traveling sign controlled by logic circuitry and providing a plurality of visual display effects
US3466645A (en) * 1965-03-01 1969-09-09 Sperry Rand Corp Digital data crt display system
US3505665A (en) * 1966-06-13 1970-04-07 Burroughs Corp Display system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292154A (en) * 1962-11-29 1966-12-13 Lab For Electronics Inc Display apparatus
US3346853A (en) * 1964-03-02 1967-10-10 Bunker Ramo Control/display apparatus
US3466645A (en) * 1965-03-01 1969-09-09 Sperry Rand Corp Digital data crt display system
US3432846A (en) * 1965-04-19 1969-03-11 Gen Electric Traveling sign controlled by logic circuitry and providing a plurality of visual display effects
US3505665A (en) * 1966-06-13 1970-04-07 Burroughs Corp Display system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868673A (en) * 1973-08-14 1975-02-25 Teletype Corp Display apparatus including character enhancement
US3895374A (en) * 1974-09-03 1975-07-15 Gte Information Syst Inc Display apparatus with selective test formatting
US3895375A (en) * 1974-09-03 1975-07-15 Gte Information Syst Inc Display apparatus with facility for underlining and striking out characters
US3896428A (en) * 1974-09-03 1975-07-22 Gte Information Syst Inc Display apparatus with selective character width multiplication
US3918039A (en) * 1974-11-07 1975-11-04 Rca Corp High-resolution digital generator of graphic symbols with edging
US3974494A (en) * 1975-01-16 1976-08-10 Mitsubishi Denki Kabushiki Kaisha Character display apparatus for providing a viewing frame for a data input area
US4146879A (en) * 1977-04-12 1979-03-27 International Business Machines Corporation Visual display with column separators
US4267548A (en) * 1977-12-23 1981-05-12 Fuji Photo Film Co., Ltd. Format-information synthesizing system
US4310839A (en) * 1979-11-23 1982-01-12 Raytheon Company Interactive display system with touch data entry
EP0051291A2 (de) * 1980-10-31 1982-05-12 Kabushiki Kaisha Toshiba System zum Ordnen von Dokumenten
EP0051291A3 (en) * 1980-10-31 1987-04-22 Kabushiki Kaisha Toshiba Document filing system

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Publication number Publication date
DK126883B (da) 1973-08-27
SE357635B (de) 1973-07-02
ES377728A1 (es) 1972-05-16
NO126191B (de) 1973-01-02
NL7003897A (de) 1970-09-24
FR2039695A5 (de) 1971-01-15
DE1914764A1 (de) 1970-10-01
CH531222A (de) 1972-11-30
BR7017659D0 (pt) 1973-01-11
GB1309698A (en) 1973-03-14
YU32574B (en) 1975-02-28
DE1914764B2 (de) 1973-11-15
YU72770A (en) 1974-08-31
AT306408B (de) 1973-04-10

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