US2544690A - Color television - Google Patents
Color television Download PDFInfo
- Publication number
- US2544690A US2544690A US718364A US71836446A US2544690A US 2544690 A US2544690 A US 2544690A US 718364 A US718364 A US 718364A US 71836446 A US71836446 A US 71836446A US 2544690 A US2544690 A US 2544690A
- Authority
- US
- United States
- Prior art keywords
- screen
- fluorescent
- electrons
- color television
- faces
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/20—Image 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
Definitions
- 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.
- 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.
- Fig. l is a side view of an illustrative embodiblue fluorescent material on faces 1.
- 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.
- 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.
- 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. .
- 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.
- 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.
- 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.
- 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.
- 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.
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR957706D FR957706A (US08063081-20111122-C00044.png) | 1946-12-26 | ||
US718364A US2544690A (en) | 1946-12-26 | 1946-12-26 | Color television |
GB33826/47A GB655681A (en) | 1946-12-26 | 1947-12-22 | Improvements in or relating to color television |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US718364A US2544690A (en) | 1946-12-26 | 1946-12-26 | 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 |
---|---|---|---|
US718364A Expired - Lifetime US2544690A (en) | 1946-12-26 | 1946-12-26 | Color television |
Country Status (3)
Country | Link |
---|---|
US (1) | US2544690A (US08063081-20111122-C00044.png) |
FR (1) | FR957706A (US08063081-20111122-C00044.png) |
GB (1) | GB655681A (US08063081-20111122-C00044.png) |
Cited By (14)
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)
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) * | 1938-02-03 | 1946-03-19 | Television receiving system | |
US2415311A (en) * | 1942-05-13 | 1947-02-04 | Rauland Corp | Cathode-ray tube projector |
-
0
- FR FR957706D patent/FR957706A/fr not_active Expired
-
1946
- 1946-12-26 US US718364A patent/US2544690A/en not_active Expired - Lifetime
-
1947
- 1947-12-22 GB GB33826/47A patent/GB655681A/en not_active Expired
Patent Citations (17)
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 |
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 |
USRE22734E (en) * | 1938-02-03 | 1946-03-19 | Television receiving system | |
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)
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 | PRODUCTION OF PATTERNS. |
Also Published As
Publication number | Publication date |
---|---|
FR957706A (US08063081-20111122-C00044.png) | 1950-02-24 |
GB655681A (en) | 1951-08-01 |
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