WO1998012727A1 - Methode de construction de tubes-image couleur avec un assortiment de canons a electrons - Google Patents
Methode de construction de tubes-image couleur avec un assortiment de canons a electrons Download PDFInfo
- Publication number
- WO1998012727A1 WO1998012727A1 PCT/FR1997/001636 FR9701636W WO9812727A1 WO 1998012727 A1 WO1998012727 A1 WO 1998012727A1 FR 9701636 W FR9701636 W FR 9701636W WO 9812727 A1 WO9812727 A1 WO 9812727A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- electron guns
- electron
- frat
- tubes
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000035945 sensitivity Effects 0.000 claims abstract description 28
- 239000007772 electrode material Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 26
- 238000010894 electron beam technology Methods 0.000 claims description 9
- 230000010339 dilation Effects 0.000 claims description 5
- 210000000481 breast Anatomy 0.000 claims 1
- 229910001374 Invar Inorganic materials 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/244—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for cathode ray tubes
Definitions
- the present invention relates to the method of constructing color picture tubes and, in particular to a method of manufacturing a plurality of color picture tubes of identical size which incorporate an electron gun chosen from an assortment of at least two different io types of electron guns
- An in-line electron gun is designed to preferably generate or initiate three electron beams in a common plane and to direct these beams along converging paths to has a
- Online electron guns have a beam-forming region and a main focusing lens and may also have a prefocus lens
- the beam-forming region usually includes three cathodes and three consecutive electrodes
- Prefocus may include two or three electrodes
- the main focusing lens is usually formed by two spaced electrodes
- FRAT horizontal differential In most online color image tube electron guns, move horizontally as the focusing voltage changes This characteristic of tube sensitivity related to focusing voltage is commonly referred to in the art as FRAT horizontal differential or FRAT- XR / B Typically, the FRAT-X R / B is defined as the movement of a
- the amplitude of the FRAT-X R / B depends on the dimensions and the spacings of the electrodes of the electron guns and is usually not zero and varies from one cannon to another
- the variation of the amplitude of the FRAT-X R / B poses several problems
- an acceptable low value of the FRAT-X R / B can usually be achieved using known techniques for opening offsets and / or thickness variations in the electrodes.
- known techniques for opening offsets and / or thickness variations in the electrodes there are families of electron guns which use a lot of common electrodes, but which have a FRAT-X R / B slightly different due to non-common electrodes, which thus causes grouping differences when they are used in the same tube.
- These grouping differences caused by differences in FRAT-X R / B typically less than 1 mm / 2 kV, can be corrected in a particular tube by means of known settings of the screen and the insolation machine of said screen (in other words, commonly known as "Q" and "X" settings).
- a relatively new problem has arisen, namely the manufacture of tubes of identical size, but having different types of electron guns, where the manufacturer of tubes cannot adjust the machines of insolation of the screens for each type of gun and must accept a compromise situation in terms of grouping errors for all types of guns. In such a case, a difference of 1 mm of the FRAT-X R / B between tubes may be unacceptable.
- the present invention provides an improvement in a method of constructing a plurality of approximately identical color image tubes, which tubes incorporate an electron gun selected from an assortment of at least two different types of electron guns.
- the electron guns each have a plurality of electrodes, each electrode having holes for the passage of three electron beams.
- the improvement includes the selection of materials for each electrode of at least two different types of electron guns which will produce the minimum difference in focusing voltage sensitivities between the two different types of electron guns.
- the construction method according to the invention is characterized in that it comprises either: ia determining a coefficient of sensitivity of the FRAT-X R / B for each electrode of said at least two electron guns, determining the expansion of external opening to external opening of said each electrode of said at least two guns with ⁇ electrode , at the stabilized operating temperature of said cnaque electrode, the determination of the dilations of external opening to external opening of at least some of the electrodes of at least one desdrts at least two electron guns, when the original materials in said i: at least certain electrodes are replaced by different materials, the determination of the FRAT-X R / B for each tube by adding the products of the sensitivity coefficient of the FRAT-X R / B and the external opening dilation to external opening of said each electrode in each electron gun, and 1 ⁇ the selection of the electrode materials of the electron guns
- Figure 1 is a side view, partially in axial section, of a color picture tube.
- Figure 2 is a plan view of the electron cancn of the tube of Figure 1.
- FIG. 1 shows a rectangular color picture tube 10 having a bulb or glass envelope 11 comprising a rectangular panel 12 and a tubular neck 14 connected by a rectangular cone 15.
- the cone 15 has an internal conductive coating (not shown) which s extends from an anode button 16 to the neck 14.
- the panel 12 comprises a transparent rectangular display panel 18 and a peripheral skirt or side wall 20 which has a sealing bearing surface which is sealed to the cone 15 by sintered glass 17.
- a screen of phosphors of three colors 22 is carried by the internal surface of the slab 18.
- the screen 22 is preferably a screen of lines, the lines of phosphors being arranged in triplets, each triplet comprising a line of phosphors of each of the three colors.
- the screen may be a dot screen, and it may or may not include a light absorbing matrix.
- Multi-aperture or perforated mask cooker selection electrode 24 is removably mounted in a predetermined spaced relationship to the screen 22.
- An electron gun 26, shown schematically in dotted lines in Figure 1, is mounted centrally inside the neck 14 to generate and direct three electron beams along converging paths through the mask 24 to the screen 22.
- the gun 26 comprises three spaced in-line cathodes 32 (K) (one for each beam, only one being shown), a control gate electrode 34 (G1), a screen grid electrode 36 (G2), an acceleration electrode 38 (G3), a pre-focusing lens electrode 40 (G4). a first main focus lens electrode 42 (G5) and a second main focus electrode 44 (G6), spaced apart in the order in which they are cited.
- Each of the electrodes G1 to G6 has three in-line openings located at the ends thereof to allow the passage of three electron beams through it.
- the main focusing electrostatic lens in the barrel 26 is formed by the facing portions of the electrode G5 42 and the electrode G6 44. All the electrodes of the barrel 26 are either directly or indirectly connected by means of pins or claws with two insulating support rods 48 and 50, which are usually made of glass and commonly called beads.
- the electrodes G1 and G2. 34 and 36, respectively, are flat plates with openings, which may or may not have reinforcing ribs within them.
- the electrode G3 38 is formed by two hollow cup-shaped elements, G3b and G3t, the open ends of which are attached to each other.
- the G4 40 electrode is a flat plate with openings.
- the electrode G5 42 is formed by two stamped elements for the cup shape, G5b and G5t, the open ends of which are attached to each other.
- the electrode G6 44 is in the form of a cup, with its open end being connected to a shielding cup 46.
- the sensitivity of the movement of the electron beam to a variation of the focusing voltage, or FRAT-X R / B, in an electron gun is determined by both the configuration and the R / B spacings (red to blue) between openings of each of the electrodes. Since the FRAT-X R / B which relates to the present invention occurs when an electron gun and a tube have reached stabilized temperatures, the materials of the electrodes are selected in order to use the thermal expansions different from the materials to adjust the spacing between apertures, to offset the initial differences of FRAT-X R / B caused by the configuration of the barrel.
- Tube A and Tube B Two different tubes, designated Tube A and Tube B. These two tubes are identical in all respects, except that they contain different types of electron guns.
- the electrodes for each of these guns are identified in the first column of each table by G1-G6.
- the second column contains a list of the sensitivity coefficients of the FRAT-X R / B with respect to the spacing between apertures, or simply the sensitivity coefficients of the FRAT-X R / B, for each electrode.
- This sensitivity coefficient is defined as the variation of the FRAT-X R / B of an electron gun (i.e. microns of FRAT-X R / B by 2 kV) compared to variations of the spacings between openings between external openings in the electrodes (i.e.
- the third column identifies the original material forming each electrode of an unmodified electron gun.
- the fourth column contains a list of the thermal expansion coefficients for each of the materials in the second column, within the temperature range to which the electrode will be subjected.
- the fifth column presents the expansion of the external opening to external opening of each electrode at its stabilized temperature, measured in microns. Columns six to thirteen show the expansion from outside opening to outside opening of each electrode at its stabilized temperature, measured in microns. when varying the materials of the individual electrodes. For example, in the seventh column for the two tubes, stainless steel 305 replaces stainless steel 430 in the electrode G1 of Tube A and invar in the electrode G1 of Tube B.
- the FRAT-X R / B or sensitivities to the focusing voltage of the two tubes are compared for various combinations of electrode materials; and the closest sensitivities for the two tubes are selected.
- the best match is the amplitude of - 700 microns for the FRAT-X R / B of Tube A, with the electrodes made of standard original material, and the amplitude of -716 microns for the FRAT-X RB of Tube B, with the replacement of steel FN42 by steel 305 for the material of the electrode G2 of the standard or original electron gun.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU43059/97A AU4305997A (en) | 1996-09-18 | 1997-09-17 | Method for making colour television tubes with a combination of electron guns |
JP51434498A JP2001506045A (ja) | 1996-09-18 | 1997-09-17 | 異種の電子銃を使用する複数のカラー受像管の製造方法 |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR96/11362 | 1996-09-18 | ||
FR9611362A FR2753566B1 (fr) | 1996-09-18 | 1996-09-18 | Methode de fabrication de tubes image couleur utilisant differents types de canons electroniques |
US08/908,167 US5944571A (en) | 1996-09-18 | 1997-08-07 | Method of making color picture tubes having a mix of electron guns |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998012727A1 true WO1998012727A1 (fr) | 1998-03-26 |
Family
ID=26232980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/001636 WO1998012727A1 (fr) | 1996-09-18 | 1997-09-17 | Methode de construction de tubes-image couleur avec un assortiment de canons a electrons |
Country Status (4)
Country | Link |
---|---|
US (1) | US5944571A (fr) |
AU (1) | AU4305997A (fr) |
FR (1) | FR2753566B1 (fr) |
WO (1) | WO1998012727A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100322067B1 (ko) * | 1999-01-25 | 2002-02-04 | 김순택 | 칼라 음극선관용 전자총 |
FR2868597B1 (fr) * | 2004-03-30 | 2007-01-12 | Thomson Licensing Sa | Canon a electrons pour tube a rayons cathodiques a zone de formation des faisceaux amelioree |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0251404A1 (fr) * | 1986-07-04 | 1988-01-07 | Koninklijke Philips Electronics N.V. | Procédé de fabrication d'un tube à rayons cathodiques |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4881006A (en) * | 1988-11-10 | 1989-11-14 | Innovative Solutions & Support, Inc. | Methods and apparatus for post-assembly custom fine-tuning of an electron beam characteristic in a cathode ray imaging tube |
US5010271A (en) * | 1989-10-24 | 1991-04-23 | Rca Licensing Corporation | Color picture tube having an electron gun with reduced convergence drift |
US4952186A (en) * | 1989-10-24 | 1990-08-28 | Rca Licensing Corporation | Method of making a color picture tube electron gun with reduced convergence drift |
KR970011875B1 (ko) * | 1993-09-28 | 1997-07-18 | 엘지전자 주식회사 | 칼라 음극선관용 인-라인형 전자총 |
-
1996
- 1996-09-18 FR FR9611362A patent/FR2753566B1/fr not_active Expired - Fee Related
-
1997
- 1997-08-07 US US08/908,167 patent/US5944571A/en not_active Expired - Fee Related
- 1997-09-17 AU AU43059/97A patent/AU4305997A/en not_active Abandoned
- 1997-09-17 WO PCT/FR1997/001636 patent/WO1998012727A1/fr active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0251404A1 (fr) * | 1986-07-04 | 1988-01-07 | Koninklijke Philips Electronics N.V. | Procédé de fabrication d'un tube à rayons cathodiques |
Also Published As
Publication number | Publication date |
---|---|
FR2753566B1 (fr) | 1998-11-27 |
US5944571A (en) | 1999-08-31 |
FR2753566A1 (fr) | 1998-03-20 |
AU4305997A (en) | 1998-04-14 |
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