Connect public, paid and private patent data with Google Patents Public Datasets

Color television

Download PDF

Info

Publication number
US2544690A
US2544690A US71836446A US2544690A US 2544690 A US2544690 A US 2544690A US 71836446 A US71836446 A US 71836446A US 2544690 A US2544690 A US 2544690A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
surfaces
screen
color
fig
fluorescent
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 - Lifetime
Application number
Inventor
Stanley J Koch
Robert E Rutherford
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.)
ALLEN B DU MONT LABORATORIES Inc
DU MONT ALLEN B LAB Inc
Original Assignee
DU MONT ALLEN B LAB Inc
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/08Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours

Description

March 13, 1951 I 5. J. KOCH E/TAL COLOR TELEVISION 2 Sheets Sheet 1 Filed Dec. 26, 1946 FIG. 2

March 13, 1951 s. J. KOCH ETAL 5 5 COLOR TELEVISION 4 Filed Dec. 26, 1946 I 2 Sheets-Sheet 2 FIG.3 3

OQQOQOOOO000.000.06.606.

PIC-L4 3 DOOOQQQQQOOQ QOOQQOQQQOQOQQQOOQ4 Patented Mar. 13 1951 UNITED STATES PATENT OFFICE COLOR TELEVISION Stanley J. Koch, Clifton, and Robert E. Ruther-' ford, Nutley, N. J.,' assignors to Allen B. Du Mont Laboratories, Inc., Passaic, N. J., a corporation of Delaware Application December 26, 1946, Serial No. 718,364

This, invention relates to color television. It relates particularly to color television in which provision is made for transmitting the three colors red, blue and green simultaneously.

6 Claims. (Cl. 250164) In carrying out the invention provision is made fluorescence, when scanned with the beam of a for applying color response material on surfaces cathode-ray tube, one giving red fluorescence, and that are at angles to each other. Cathode-rays one giving blue fluorescence, for example. The are provided to scan the respective color resize of these faces are such that a single group is sponse materials. Three sets of surfaces are proequal to or smaller than the scanning spot as norvided with the surfaces of each set parallel to the mally used to provide a predetermined size teleother surfaces of that set and substantially pervision picture. pendicular to the surfaces of the other sets. Each gun 4 is a source of light, that is, one gun The invention may be understood from the excites the red fluorescent material on faces 5, description in connection with the accompanying another gun excites the green fluorescent madrawings in which: 7 l5 terial on faces 6, and the third gun excites the Fig. l is a side view of an illustrative embodiblue fluorescent material on faces 1. Thus by ment of the invention, showing a cathode-ray applying color television signals simultaneously tube. from a color television transmitter source in the Fig. 2 is a rear view of the cathode-ray tube known way to the respective guns the three shown in Fig. 1. colors are combined or merged in the faces 5, 6

Fig. 3 is a plan view of enlarged elements showand l of the screen 3 to produce colored pictures. ing a screen for said tube. This arrangement can, by keying in the known Fig. 4 is an edge view of Fig. 3. way, also be used with sequential colored tele- Fig. 5 is a plan view on an enlarged scale showvision systems by applying the proper color seing a small portion of Fig. 3. quence to the grids of the respective cathode-ray Fig. 6 is a cross section on a larger scale along tube guns 4. the line aa of Fig. 5 showing the aluminum It will be understood from this description that backing of the fluorescent screen. the angle at which the electrons strike the 7 s an edge view of a modification of fluorescent surfaces 5, 6 and 1, is critical. The Fig. 4. 3O electrons from guns 4 should strike their respec- In he drawin s referenc ch ra er 1 indi a s tive surfaces in a direction that is perpendicular a glass nvelop r u upon the i i f c 2 of or substantially perpendicular to these surfaces which is located a screen 3 to be described more i der t btain the best results. in detail below. This screen 3 may be placed It has been found to be advantageous to apply upon the inside face 2 of the tube I or the screen a Very thin layer 9 (Fig. 6) of evaporated aluy be embodied in the inside Surface of the minum to the fluorescent surfaces 5, 6 and l. face 2. When such a thin aluminum layer 9 is applied Three cat odey u s 4 are arranged at to the surfaces 5, 6 and I the electrons that strike angles to the c 2. e Screen is provided W perpendicularly to the aluminum surfaces will three sets of parallel faces and each cathode-ray 40 penetrate th m i it readfly a d thu un 4 is so located that its beam strikes only on excite the fluorescent material on these surfaces, s t f th parall l fac of the s These but the electrons that strike at an acute angle to c y guns 4 are located in positions to the surfaces will not penetrate to the fluorescent p j c their Cathode-rays perpendicularly material due to the greater length of aluminum su s antial y p p d u ly n the three path through which they traverse at acute angles. spective surfaces of the screen which the beams h 1 t from any one of th guns 111 of these guns scan. 7 penetrate the faces which are perpendicular to A glass pl 3 is shown in Fi 3 to 6 havin the electron beam of such a gun, but the eleca pattern of depressions and projections protrons from the same beam which strike the other duced by embossing as shown in Fig. 5 on an enfaces will strike them at a very acute angle, and larged scale. Each one of these projections has because of the presence of the aluminum layers three faces 5, G and I to which screen material they will not excite the unwanted colored fluohaving different color response characteristics rescent materials under these layers. When such is applied. Each one of the faces 5, 6 and l, is at layers are used the guns can be brought closer approximately 90 to each of the other two faces. together and in this way the need for correction for the registry of the patterns due to the various angles of the guns is decreased. A further advantage of the aluminizing using the reflection phenomena of the aluminum surface allows the tube to be viewed from a greater angle than otherwise would be the case, that is, the group of facets 'beinggmirrored by the aluminum reflects the lightjfromzthe opposite facets. .For example, surfaces which produce green light will also :be reflected from the other surfaces 6 and I so that the viewer from the far side who would not otherwise see the equal area of the green facet sees by reflection the desired amount :of the green color. This applies-to all three colorsso that there is not only a larger viewing angle for registering the proper colors, but there is also a better mixing of the colors .by reflection of the various lights within the facets themselves.

This larger viewing angle can be improvedby providing lenses 8 (Fig.2?) on the front side ofthe screenshownin Fig. 3,-each lens being the size of a group of three colors represented ,by reference characters 5,-6.and I. This improvement in the viewing angle comesabout by .virtue of the .ability of the lenses to assist in the concentrationiof the three beams of light from the three sets of facets 5, 6, and 1 into one .beamof light maintaining "a goodcolor balance over a wider ,angle than is, possible without the lenses.

-What isclaimedfis:

1. A color selection screen; embossments on said screen; facets. on said embossments; said embossments jbeingarranged so that eachfacet on eachembossmentis substantially parallel ,to

a corresponding faceton adjacent embossments whereby a plurality of .groups .of surfaces is formed; a fluorescentcoating on said screen, said coating beingcomposedof diiferentmaterials on said groups .ofv surfaces, each .of said materials beingadapted to..emit' light ofa dilferent color than the othersof said materials whenexcited by electrons; and ametallicllayer ,coveringsaid fluorescent coating, .said metallic layer being permeable .to electrons that. strike it essentially perpendicularly .and impermeable .to electrons striking it substantially tangentially.

v2.. In a color television system, a vacuum .tube

havinglascreen with .alfluorescent surface and a plurality of,.electron gunsfor generating electronbeams forscanning said .screen; embossments on oneside of said surface, said embossmentsforming aplurality of sets of fluorescent surfaces angularlydisposed with respect to, each .otherand positioned ,to bestruck respectively ,byindividual ones of said electron beams; and

metallic coating beingpermeable only to electrons striking it essentially perpendicularly; and

three electronguns located sothat the electrons fromeach one of saidguns strikes one of said portions substantially perpendicularly.

4..A ffluorescent screen comprising a lightpermeable plate embossed on onesurface with trihedral protuberances so arranged that each side of each of said protuberances is substantially parallel to one side of all other of said protuberances whereby the said surface is divided into three sets of substantially parallel planes; three types of fluorescent coatings, one type on each of said sets of planes, each of said types of coating ,having a naturalfluorescense in one of :the; three'-primary colors when excited-by electrons; and a metallic coating over said fluorescent coatings, said metallic coating being permeable to electrons only when struck thereby at an angle substantially normal to the plane thereof.

5. A fluorescent screen comprising a lightpermeableplateembossed on one surface with trihedral protuberances so arranged that each sideofzeach of; said protuberances is substantially parallel to one side of all other of said protuberances whereby the'said surface is divided into three-sets of substantially parallel planes; three types of fluorescent coatings, one type on each of said-setsof planeseachof said types of coatinghaving a natural fluorescence in ,oneof the three primary colors when excited by electrons; and a metalliccoating over saidffluorescent coatings, said metallic coating being permeable to electronsonly when struck thereby at an angle substantially normal to the, plane thereof; and a plurality of essentially coplanar lenses on the othersurface of said plate,.each of said lenses covering an area of the plate substantiallyequal to thearea of one of said trihedral protuberances.

6. In a ,color television system, a cathode ray tube having a fluorescent screen and a plurality of electron guns for generating electron beams for scanning said screen, one side of said screen beingembossed forming aplurality of, sets of fluorescent surfaces angularly disposed with respect to each other and positioned to be struck respectively by individual ones of said electron beams, and a metallic coating, over said fluorescent. screen,.said coating being permeable to electrons only when struck thereby at an angle substantially normal to the plane thereof.

STANLEY JIKOCH. ROBERT E; RUTHERFORD.

. REFERENCES CITED The following references-are of-record inthe file of this patent:

UNITED STATES PATENTS Number Name Date vRe. 22,734 Rosenthal Mar. 19, 1946 2,029,639 Schlesinger, Feb. 4, 1936 2,083,203 Schlesinger June.8, 1937 2,121,356 ,Knoll June21, 1938 2,170,944 Glass et al Aug. 29, 1939 2,180,957 Hollmann Nov. 21,1939 2,195,489 Iams Apr. 2,1940 2,201,245 'Ruska et a] '.May 21, 19.40 2,280,191 'I-Iergenrother Apr. 21, 1942 2,289,978 Malter, July 14, 1942 2,310,863 .Leverenz Feb. 9, 1943 2,312,792 ,Bamford .Mar. 2, 1943 2,337,980 ,Du Mont et al., Dec. 28, 1943 2,367,277 jHenroteau Jan. 16, 1945 2,415,311 'Szegho Feb.4, 1947 FOREIGN PATENTS Number Country Date 508,037 GreatBritain June 26, 1939 562,168 Great Britain June21, 1944

US2544690A 1946-12-26 1946-12-26 Color television Expired - Lifetime US2544690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2544690A US2544690A (en) 1946-12-26 1946-12-26 Color television

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR957706A FR957706A (en) 1946-12-26
US2544690A US2544690A (en) 1946-12-26 1946-12-26 Color television
GB3382647A GB655681A (en) 1946-12-26 1947-12-22 Improvements in or relating to color television

Publications (1)

Publication Number Publication Date
US2544690A true US2544690A (en) 1951-03-13

Family

ID=24885821

Family Applications (1)

Application Number Title Priority Date Filing Date
US2544690A Expired - Lifetime US2544690A (en) 1946-12-26 1946-12-26 Color television

Country Status (3)

Country Link
US (1) US2544690A (en)
FR (1) FR957706A (en)
GB (1) GB655681A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577368A (en) * 1950-02-14 1951-12-04 Charles Doerr Color television receiving apparatus
US2605434A (en) * 1949-12-08 1952-07-29 John H Homrighous Single beam three color cathoderay tube
US2606303A (en) * 1951-02-17 1952-08-05 Bramley Jenny Color television tube and process
US2622220A (en) * 1949-03-22 1952-12-16 Technicolor Motion Picture Television color screen
US2633547A (en) * 1950-06-30 1953-03-31 Rca Corp Two-sided electron-sensitive screen
US2677073A (en) * 1947-12-02 1954-04-27 Du Mont Allen B Lab Inc Control device for simultaneous color television
US2692532A (en) * 1951-04-04 1954-10-26 Chromatic Television Lab Inc Cathode ray focusing apparatus
US2769111A (en) * 1951-07-25 1956-10-30 Philco Corp Optical system
US2930930A (en) * 1957-05-03 1960-03-29 Kaiser Ind Corp Electronic device
US3011090A (en) * 1952-06-24 1961-11-28 Rca Corp Plural beam tube
US3136917A (en) * 1960-03-14 1964-06-09 Dick Co Ab Electrostatic writing means
US3184630A (en) * 1960-07-12 1965-05-18 Geer Charles Willard Three-dimensional display apparatus
US3226596A (en) * 1963-06-21 1965-12-28 Kasperowicz Henry Flat color cathode ray tube
EP0127678A1 (en) * 1982-12-13 1984-12-12 Battelle Development Corporation Providing patterns

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2029639A (en) * 1931-12-24 1936-02-04 Schlesinger Kurt Braun tube
US2083203A (en) * 1932-10-01 1937-06-08 Schlesinger Kurt Braun tube
US2121356A (en) * 1934-02-02 1938-06-21 Telefunken Gmbh Electron tube
GB508037A (en) * 1937-12-24 1939-06-26 Kolster Brandes Ltd Colour television system
US2170944A (en) * 1937-05-29 1939-08-29 Bell Telephone Labor Inc Multicathode ray discharge device
US2180957A (en) * 1936-03-04 1939-11-21 Telefunken Gmbh Electronic device
US2195489A (en) * 1937-10-26 1940-04-02 Rca Corp Television transmitting tube
US2201245A (en) * 1936-11-17 1940-05-21 Firm Fernseh Aktien Ges Cathode ray projection tube
US2280191A (en) * 1939-09-30 1942-04-21 Hazeltine Corp Cathode-ray signal-reproducing unit
US2289978A (en) * 1940-11-30 1942-07-14 Rca Corp Television picture tube screen
US2310863A (en) * 1941-01-25 1943-02-09 Rca Corp Luminescent screen
US2312792A (en) * 1941-08-14 1943-03-02 Farnsworth Television Color television system
US2337980A (en) * 1941-04-26 1943-12-28 Du Mont Allen B Lab Inc System for color television receivers
GB562168A (en) * 1942-07-25 1944-06-21 John Logie Baird Improvements in colour television
US2367277A (en) * 1938-01-20 1945-01-16 Henroteau Francois Char Plerre Method and apparatus for frequency changing
USRE22734E (en) * 1946-03-19 Television receiving system
US2415311A (en) * 1942-05-13 1947-02-04 Rauland Corp Cathode-ray tube projector

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE22734E (en) * 1946-03-19 Television receiving system
US2029639A (en) * 1931-12-24 1936-02-04 Schlesinger Kurt Braun tube
US2083203A (en) * 1932-10-01 1937-06-08 Schlesinger Kurt Braun tube
US2121356A (en) * 1934-02-02 1938-06-21 Telefunken Gmbh Electron tube
US2180957A (en) * 1936-03-04 1939-11-21 Telefunken Gmbh Electronic device
US2201245A (en) * 1936-11-17 1940-05-21 Firm Fernseh Aktien Ges Cathode ray projection tube
US2170944A (en) * 1937-05-29 1939-08-29 Bell Telephone Labor Inc Multicathode ray discharge device
US2195489A (en) * 1937-10-26 1940-04-02 Rca Corp Television transmitting tube
GB508037A (en) * 1937-12-24 1939-06-26 Kolster Brandes Ltd Colour television system
US2367277A (en) * 1938-01-20 1945-01-16 Henroteau Francois Char Plerre Method and apparatus for frequency changing
US2280191A (en) * 1939-09-30 1942-04-21 Hazeltine Corp Cathode-ray signal-reproducing unit
US2289978A (en) * 1940-11-30 1942-07-14 Rca Corp Television picture tube screen
US2310863A (en) * 1941-01-25 1943-02-09 Rca Corp Luminescent screen
US2337980A (en) * 1941-04-26 1943-12-28 Du Mont Allen B Lab Inc System for color television receivers
US2312792A (en) * 1941-08-14 1943-03-02 Farnsworth Television Color television system
US2415311A (en) * 1942-05-13 1947-02-04 Rauland Corp Cathode-ray tube projector
GB562168A (en) * 1942-07-25 1944-06-21 John Logie Baird Improvements in colour television

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677073A (en) * 1947-12-02 1954-04-27 Du Mont Allen B Lab Inc Control device for simultaneous color television
US2622220A (en) * 1949-03-22 1952-12-16 Technicolor Motion Picture Television color screen
US2605434A (en) * 1949-12-08 1952-07-29 John H Homrighous Single beam three color cathoderay tube
US2577368A (en) * 1950-02-14 1951-12-04 Charles Doerr Color television receiving apparatus
US2633547A (en) * 1950-06-30 1953-03-31 Rca Corp Two-sided electron-sensitive screen
US2606303A (en) * 1951-02-17 1952-08-05 Bramley Jenny Color television tube and process
US2692532A (en) * 1951-04-04 1954-10-26 Chromatic Television Lab Inc Cathode ray focusing apparatus
US2769111A (en) * 1951-07-25 1956-10-30 Philco Corp Optical system
US3011090A (en) * 1952-06-24 1961-11-28 Rca Corp Plural beam tube
US2930930A (en) * 1957-05-03 1960-03-29 Kaiser Ind Corp Electronic device
US3136917A (en) * 1960-03-14 1964-06-09 Dick Co Ab Electrostatic writing means
US3184630A (en) * 1960-07-12 1965-05-18 Geer Charles Willard Three-dimensional display apparatus
US3226596A (en) * 1963-06-21 1965-12-28 Kasperowicz Henry Flat color cathode ray tube
EP0127678A1 (en) * 1982-12-13 1984-12-12 Battelle Development Corporation Providing patterns
US4494865A (en) * 1982-12-13 1985-01-22 Battelle Development Corporation Providing patterns
EP0127678A4 (en) * 1982-12-13 1985-12-30 Battelle Development Corp Providing patterns.

Also Published As

Publication number Publication date Type
GB655681A (en) 1951-08-01 application
FR957706A (en) 1950-02-24 grant

Similar Documents

Publication Publication Date Title
US2957106A (en) Plural beam gun
US2310863A (en) Luminescent screen
US2971117A (en) Color-kinescopes, etc.
US3146368A (en) Cathode-ray tube with color dots spaced by light absorbing areas
US5378962A (en) Method and apparatus for a high resolution, flat panel cathodoluminescent display device
US5911024A (en) Fiber optic display screen assembly and method for making a fiber optic screen
US3071706A (en) Plural beam cathode ray tube
US2690518A (en) Color picture tube
US2692532A (en) Cathode ray focusing apparatus
US2821637A (en) Light image reproduction devices
US4392077A (en) Deeply filtered television image display
US4973888A (en) Image display device
US4145633A (en) Modular guided beam flat display device
US2605335A (en) Light amplifier
US4723119A (en) Large-sized color display device
US2481839A (en) Color television
US4551652A (en) Display screen having aluminum phosphate barrier layer and method of manufacture
US2728025A (en) Post-deflected cathode-ray tubes
US2590764A (en) Color television image tube
US2480848A (en) Color television device
US4280125A (en) Thin vacuum panel display device
US2581487A (en) Color television reproduction tube
USRE23672E (en) Television tube
US3392297A (en) Color triad tube having heat-absorptive material on aluminum screen backing for cooling shadow mask
US2755402A (en) Color kinescopes of the masked-target dot-screen variety