GB729685A - Improvements in or relating to colour-television image-reproducing apparatus - Google Patents

Improvements in or relating to colour-television image-reproducing apparatus

Info

Publication number
GB729685A
GB729685A GB9394/53A GB939453A GB729685A GB 729685 A GB729685 A GB 729685A GB 9394/53 A GB9394/53 A GB 9394/53A GB 939453 A GB939453 A GB 939453A GB 729685 A GB729685 A GB 729685A
Authority
GB
United Kingdom
Prior art keywords
colour
spot
tube
produced
strips
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
GB9394/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB729685A publication Critical patent/GB729685A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/56—Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/26—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using electron-optical colour selection means, e.g. line grid, deflection means in or near the gun or near the phosphor screen

Abstract

729,685. Colour television tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 7. 1953 [April 10, 1952], No. 9394/53. Class 39 (1), [Also in Group XL (b)] In a colour television system in which the receiving cathode-ray tube screen is comprised of a repeating series of red, green and blue strips scanned in the direction of the strips, the cathode-ray beam is arranged to exhibit astigmatism whereby, with a change in the tube focus, the spot on the tube screen may be arranged to change in shape as shown at 10, 11 and 12 in Fig. 2. With the spot as shown at 10 three colour strips are embraced and white is produced. With the spot as shown at 12 only one strip is covered and a fully saturated colour is produced. With intermediate shapes of spot, such as 11, varying degrees of saturation are produced. The system operates with signals conveying information of image brightness, degree of saturation and colour which are applied respectively to the tube modulator, focus coil and an auxiliary frame deflection coil employed to position the scan on the correct coloured strips. As an alternative, the colour signal may be combined with the sawtooth in the normal frame deflection coils. The astigmatism may be produced: (1) by energizing the line or frame deflection coils in parallel with deflection current and in series with direct current, Fig. 5 (not shown); (2) by a flattened or elliptical shaped coil energized with direct current and disposed around the tube between the focus coil and screen, Fig. 4 (not shown); (3) by an electron-optical system comprising a tubular electrode of elliptical section; or (4) by maintaining the mean potential of deflecting plates (when electrostatic deflection is employed) different from the voltage of the final anode. To prevent variations in the beam current causing variations in focus, a voltage derived from the brightness signal may be applied as a converting voltage to the focus coil.
GB9394/53A 1952-04-10 1953-04-07 Improvements in or relating to colour-television image-reproducing apparatus Expired GB729685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL310372X 1952-04-10

Publications (1)

Publication Number Publication Date
GB729685A true GB729685A (en) 1955-05-11

Family

ID=19783614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9394/53A Expired GB729685A (en) 1952-04-10 1953-04-07 Improvements in or relating to colour-television image-reproducing apparatus

Country Status (7)

Country Link
US (1) US2784342A (en)
BE (1) BE519060A (en)
CH (1) CH310372A (en)
DE (1) DE942747C (en)
FR (1) FR1076406A (en)
GB (1) GB729685A (en)
NL (1) NL168782B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142207A (en) * 1983-06-22 1985-01-09 Raytheon Co Pseudo-raster weather display apparatus

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921211A (en) * 1955-02-23 1960-01-12 Westinghouse Electric Corp Image reproduction device
US2922073A (en) * 1955-03-22 1960-01-19 Kendon Electronics Inc Color reproduction systems of the cathode ray tube type
NL219039A (en) * 1956-07-19
US3032608A (en) * 1956-11-15 1962-05-01 Gen Electric Color tube potential switching between color and monochrome reproduction
US2905855A (en) * 1957-06-24 1959-09-22 Westinghouse Electric Corp Image display system
CH360706A (en) * 1958-02-25 1962-03-15 Gretag Ag Bar system for streak optics
US3277235A (en) * 1959-03-20 1966-10-04 David M Goodman Wide band and color cathode ray tubes and systems
BE620211A (en) * 1961-08-23
US3280250A (en) * 1962-06-01 1966-10-18 Scope Inc Color television receiver including means for scanning the same horizontal lines during consecutive fields
US3437870A (en) * 1965-11-03 1969-04-08 Minnesota Mining & Mfg Scan line masking system
US3470414A (en) * 1968-05-27 1969-09-30 Westinghouse Electric Corp Direct view storage system
US3678195A (en) * 1971-06-18 1972-07-18 Fernseh Gmbh Smearing effect attenuation
JPS5739108B2 (en) * 1973-11-12 1982-08-19
DE3005946A1 (en) * 1980-02-16 1981-08-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart COLOR IMAGE TUBES WITHOUT A SHADOW MASK AND WITH ONLY ONE ELECTRONIC CANNON

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137353A (en) * 1934-03-03 1938-11-22 Loewe Opta Gmbh Television tube
US2212640A (en) * 1934-07-07 1940-08-27 Radio Inventions Inc Cathode ray system
US2304163A (en) * 1940-11-23 1942-12-08 Rca Corp Modulation system
US2278478A (en) * 1941-01-10 1942-04-07 Bell Telephone Labor Inc Magnetic coil and arrangement utilizing the same
US2310863A (en) * 1941-01-25 1943-02-09 Rca Corp Luminescent screen
US2481839A (en) * 1944-08-05 1949-09-13 Rca Corp Color television
US2431115A (en) * 1944-08-05 1947-11-18 Alfred N Goldsmith Color television system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142207A (en) * 1983-06-22 1985-01-09 Raytheon Co Pseudo-raster weather display apparatus
US4678969A (en) * 1983-06-22 1987-07-07 Raytheon Company Pseudo-raster weather display apparatus

Also Published As

Publication number Publication date
NL168782B (en)
FR1076406A (en) 1954-10-26
CH310372A (en) 1955-10-15
US2784342A (en) 1957-03-05
BE519060A (en)
DE942747C (en) 1956-05-09

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