GB931277A - Improvements in and relating to television picture display devices - Google Patents

Improvements in and relating to television picture display devices

Info

Publication number
GB931277A
GB931277A GB11604/59A GB1160459A GB931277A GB 931277 A GB931277 A GB 931277A GB 11604/59 A GB11604/59 A GB 11604/59A GB 1160459 A GB1160459 A GB 1160459A GB 931277 A GB931277 A GB 931277A
Authority
GB
United Kingdom
Prior art keywords
scanning
produced
areas
wobble
pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB11604/59A
Inventor
Leslie Connock Jesty
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SYLVANIA THORN COLOUR TELEVISION LABORATORIES Ltd
Original Assignee
SYLVANIA THORN COLOUR TELEVISION LABORATORIES Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB37537/57A priority Critical patent/GB850024A/en
Application filed by SYLVANIA THORN COLOUR TELEVISION LABORATORIES Ltd filed Critical SYLVANIA THORN COLOUR TELEVISION LABORATORIES Ltd
Priority to GB36784/62A priority patent/GB931279A/en
Priority to GB11604/59A priority patent/GB931277A/en
Publication of GB931277A publication Critical patent/GB931277A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/34—Elemental scanning area oscillated rapidly in direction transverse to main scanning direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Processing Of Color Television Signals (AREA)
  • Details Of Television Scanning (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

931,277. Television. SYLVANIA-THORN COLOUR TELEVISION LABORATORIES Ltd. April 6, 1960 [April 6, 1959], No. 11604/59. Class 40 (3). A television picture is reproduced in a dotinterlaced pattern comprised of elementary areas 12 and 13 produced during the scanning of odd and even fields 10 and 11 respectively. The patterns may be produced by pulse control of the intensity of the scanning beam of the picture tube. Alternatively, the pattern is produced by deflecting the scanning beam in a direction transverse to that of line scanning (spot-wobble), one or more harmonies of the wobble frequency being added to the fundamental (sinusoidal) to increase the time spent by the spot in the neighbourhood of the areas 12, 13 or, the scanning velocity of the beam may be varied by the addition of a sawtooth waveform or of a sinusoidal waveform with harmonics as indicated above. With any of these arrangements the necessary 180 degrees phase shift of the wobble, scanning velocity control or brightness pulsing waveforms during alternate field scans may be automatically produced by making the (fundamental) frequencies of such waveforms equal to an odd multiple of half the field scanning frequency. The pattern may be produced by an electroluminescent panel the elementary areas of which correspond to the areas 12 and 13. Specifications 850,024 and 864,233 are referred to.
GB11604/59A 1959-04-06 1959-04-06 Improvements in and relating to television picture display devices Expired GB931277A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB37537/57A GB850024A (en) 1959-04-06 1957-12-02 Improvements in or relating to television systems
GB36784/62A GB931279A (en) 1959-04-06 1959-04-06 Improvements in or relating to television systems
GB11604/59A GB931277A (en) 1959-04-06 1959-04-06 Improvements in and relating to television picture display devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11604/59A GB931277A (en) 1959-04-06 1959-04-06 Improvements in and relating to television picture display devices

Publications (1)

Publication Number Publication Date
GB931277A true GB931277A (en) 1963-07-17

Family

ID=9989298

Family Applications (3)

Application Number Title Priority Date Filing Date
GB37537/57A Expired GB850024A (en) 1959-04-06 1957-12-02 Improvements in or relating to television systems
GB36784/62A Expired GB931279A (en) 1959-04-06 1959-04-06 Improvements in or relating to television systems
GB11604/59A Expired GB931277A (en) 1959-04-06 1959-04-06 Improvements in and relating to television picture display devices

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB37537/57A Expired GB850024A (en) 1959-04-06 1957-12-02 Improvements in or relating to television systems
GB36784/62A Expired GB931279A (en) 1959-04-06 1959-04-06 Improvements in or relating to television systems

Country Status (1)

Country Link
GB (3) GB850024A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533951A (en) * 1982-09-27 1985-08-06 Rca Corporation System for generating and displaying a compatible high definition television signal by progressive scanning
GB2161669A (en) * 1982-02-24 1986-01-15 Rca Corp Television systems
US4707728A (en) * 1982-02-24 1987-11-17 Rca Corporation Compatible HDTV with increased vertical and horizontal resolution

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521803A (en) * 1982-10-07 1985-06-04 General Electric Company System for compatible transmission of high-resolution TV

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161669A (en) * 1982-02-24 1986-01-15 Rca Corp Television systems
US4707728A (en) * 1982-02-24 1987-11-17 Rca Corporation Compatible HDTV with increased vertical and horizontal resolution
US4533951A (en) * 1982-09-27 1985-08-06 Rca Corporation System for generating and displaying a compatible high definition television signal by progressive scanning

Also Published As

Publication number Publication date
GB850024A (en) 1960-09-28
GB931279A (en) 1963-07-17

Similar Documents

Publication Publication Date Title
GB523575A (en) Improvements in or relating to methods of generating pulses characteristic of sound and like waves
GB530776A (en) Improvements in or relating to the secret transmission of television and like signals
GB917805A (en) Improvements in and relating to colour television receivers
GB674114A (en) Improvements in cathode ray tube system for colour television
GB515947A (en) Improvements in or relating to cathode ray tube arrangements
GB931277A (en) Improvements in and relating to television picture display devices
US3130346A (en) Uniform brightness control
ES432249A1 (en) Video signal reproducing device with electron beam scanning velocity modulation
ES401855A1 (en) Flyback eht and sawtooth current generator having a flyback period of at least sixth order
US2903615A (en) Apparatus and method for the electronic representation of characters
JPS5412249A (en) Saw-tooth wave generator
GB871155A (en) Improvements in and relating to colour television receivers
JPS57180281A (en) Erasing method of raster in television picture pickup device
GB1159181A (en) Symbol Generator
SE7910006L (en) FERG TV RECEIVER WITH STRALIN CONNECTION
GB614595A (en) Improvements in or relating to radar apparatus
JPS54133070A (en) Constituent for electron gun
SU527721A1 (en) Device for displaying circular arcs on the screen of a cathode ray tube
GB931278A (en) Improvements in or relating to television systems
GB1402008A (en) Television image-display system
SU769661A1 (en) Method of focusing electron beam
JPS53118921A (en) Color receiving unit
FR2266224A1 (en) TV screen supplementary character display - modifies colour or brightness selected screen areas to define character segments
SU561986A1 (en) Device for displaying information
GB573226A (en) Cathode ray tube apparatus for large screen television purposes