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公开(公告)号：JP2004220803A
公开(公告)日：2004-08-05
申请号：JP2003003444
申请日：2003-01-09
Applicant: Toshiba Corp , Toshiba Electronic Engineering Corp , 東芝電子エンジニアリング株式会社 , 株式会社東芝
Inventor： UENO HIROBUMI , SUGAWARA SHIGERU
IPC: H01J29/48
Abstract: PROBLEM TO BE SOLVED: To provide a cathode-ray tube capable of displaying a high-luminance and high-precision image.
SOLUTION: An electron gun structure 7 has an electron beam generation part for generating three electron beams arranged on a line. The electron beam generation part is composed of cathodes K (R, G and B), a first grid G1 and a second grid G2. The first grid G1 comprises three segments corresponding to the three cathodes for respectively generating the electron beams. A first image signal is applied to each cathode, and a second image signal modulated by synchronizing with the first image signal applied to the corresponding cathode is applied to each segment. The electron gun structure is characterized in that the amount of the electron beam generated from the electron beam generation part is controlled by varying the value of (the amplitude of the second image signal)/(the amplitude of the first image signal).
COPYRIGHT: (C)2004,JPO&NCIPI-
公开(公告)号：JP2002260560A
公开(公告)日：2002-09-13
申请号：JP2001058518
申请日：2001-03-02
Applicant: TOSHIBA CORP
Inventor： MAKIMOTO SHUJI , SONEDA KOICHI , SUGAWARA SHIGERU
Abstract: PROBLEM TO BE SOLVED: To provide a color cathode-ray tube having an improved picture quality by suppressing deterioration in the color purity without involving an increase in the cost. SOLUTION: The color cathode-ray tube comprises, a panel 1 whose external surface is almost flat, a phosphor screen 6 which is formed on an inner surface of the panel 1, and a shadow mask 14 which is disposed opposite to the phosphor screen 6. The panel 1 has an axis extending horizontally which crosses a tube axis perpendicularly and an axis extending vertically which crosses the tube axis and the horizontal axis perpendicularly. And TD =6 deg.C are satisfied, wherein TC, TV, TH and TD are temperatures, during operation of the tube, at the central part, end part of the vertical axis, end part of the horizontal axis and end part of the diagonal axis, respectively, of the panel surface.
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公开(公告)号：JP2000156178A
公开(公告)日：2000-06-06
申请号：JP33079998
申请日：1998-11-20
Applicant: TOSHIBA CORP
Inventor： KIMIYA JUNICHI , SUGAWARA SHIGERU , OKUBO SHUNJI
Abstract: PROBLEM TO BE SOLVED: To provide a cathode-ray tube capable of obtaining satisfactory resolution over the whole area of a screen by resolving or reducing the beam spot shape deflection phenomenon due to the difference of lens powers between the horizontal direction and the vertical direction generated in the periphery of the screen. SOLUTION: A sixth grid (G6) forming a main electron lens part is formed of a first positive electrode G61, an auxiliary electrode G62 and a second positive electrode G63. A medium voltage is applied to a fifth grid (G5), and the positive electrode voltage is applied to the first and the second positive electrodes G61, G63, and an intermediate voltage between the described voltages is applied to an intermediate electrode GM and the auxiliary electrode G62.
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公开(公告)号：JP2000077011A
公开(公告)日：2000-03-14
申请号：JP24734898
申请日：1998-09-01
Applicant: Toshiba Corp , Toshiba Electronic Engineering Corp , 東芝電子エンジニアリング株式会社 , 株式会社東芝
Inventor： SUGAWARA SHIGERU , UENO HIROBUMI , TAKEGAWA TSUTOMU
Abstract: PROBLEM TO BE SOLVED: To provide a good image quality on a whole screen without an increase in cost by reducing an effect from polarization aberration to an electron beam, and suppressing a horizontal crush of an electron beam spot in a periphery of a fluorescent screen.
SOLUTION: A second grid G2 has horizontal thin plates 102 (102R, 102G, and 102B) on an opposite surface to a third grid G3. Electron beam passing holes G2 (G2r, G2g, and G2b) are formed on the thin plates 102. Side walls 112 (112R, 112G, and 112B) connecting a plate-shaped electrode surface of the second grid G2 to the thin plates 102 are formed so that angles θ1 formed with the thin plates 102 are greater than 900. More preferably, the angles θ1 are set to be not less than 105° and not greater than 140°.
COPYRIGHT: (C)2000,JPOAbstract translation: 要解决的问题：通过减少从偏振像差到电子束的影响，并且抑制荧光屏周围的电子束点的水平挤压，在整个屏幕上提供良好的图像质量而不会增加成本。 解决方案：第二格栅G2在与第三格栅G3相反的表面上具有水平薄板102（102R，102G和102B）。 电子束通过孔G2（G2r，G2g和G2b）形成在薄板102上。将第二格栅G2的板状电极表面连接到薄板102的侧壁112（112R，112G和112B） 形成为使得与薄板102形成的角度θ1大于900°。更优选地，角度θ1设定为不小于105度。 不大于140度
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公开(公告)号：JPH11339691A
公开(公告)日：1999-12-10
申请号：JP15004698
申请日：1998-05-29
Applicant: TOSHIBA CORP
Inventor： ONO OSAMU , SUGAWARA SHIGERU , SATO KAZUNORI , AWANO KOJI
Abstract: PROBLEM TO BE SOLVED: To provide a cathode-ray tube displaying a good quality image, by enhancing microphonic noise characteristics without deteriorating stem fixing strength of an electron gun. SOLUTION: In this cathode-ray tube, an electron gun 16 is fixed to a stem through a lug plate 23 fixed to one end part of an insulation supporting body 22 to fix a heater H, a cathode K and plural electrodes G1-G4 and the inner lead 25 of the stem 24 welded to this lug plate. In this case, a vibration absorbing part is provided between the insulation supporting body fixing part of the lag plate and the inner lead welding part.
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Patent Agency Ranking
公开(公告)号：JPH11195389A
公开(公告)日：1999-07-21
申请号：JP75998
申请日：1998-01-06
Applicant: TOSHIBA CORP
Inventor： HASEGAWA TAKAHIRO , SUGAWARA SHIGERU , SUZUKI FUMITO
Abstract: PROBLEM TO BE SOLVED: To provide a color picture tube provided with an electron gun capable of suppressing a convergence drift by the neck potential to form the main lens part having favorable lens performance. SOLUTION: For at least part of an inter-electrode gap (g) between a fifth electrode 50 and a sixth electrode 60 composing the main lens part of an electron gun structural body, preferably 70% of the inter-electrode gap (g) or more, it is covered with a high resistance film 350 connected to an internal conductive film 300 at one end, and formed on an inner wall of a neck 5. Charge-up of the neck inner wall is thus reduced, and potential penetration to the main lens part by a neck inner wall potential can be suppressed.
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公开(公告)号：JPH09320483A
公开(公告)日：1997-12-12
申请号：JP13316996
申请日：1996-05-28
Applicant: TOSHIBA CORP
Inventor： SUZUKI FUMITO , HASEGAWA TAKAHIRO , SUGAWARA SHIGERU , KIMIYA JUNICHI
Abstract: PROBLEM TO BE SOLVED: To provide an electron gun which can restrain both field emission from the connection part of a resistor with grids and the destruction of the resistor. SOLUTION: In the electron gun for a cathode-ray tube, its main electron lens part ML is provided at least with a first, a second and third grid G3, G5 and G6, which are disposed in order toward the target direction, and with a fourth grid G7 to which anode voltage is applied. In this case, the second and third grids are laid adjacently, dynamic focus voltage which is changed while being synchronized with the deflection of electron beams, is applied to the first and third grids, and it is so structured that the first and second grids are thereby connected with each other by a resistor 24 disposed nearby.
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公开(公告)号：JPH07220648A
公开(公告)日：1995-08-18
申请号：JP798494
申请日：1994-01-28
Applicant: TOSHIBA CORP
Inventor： KIMIYA JUNICHI , SUGAWARA SHIGERU , KANBARA EIJI , SHIMOKAWABE JIRO
Abstract: PURPOSE:To prevent a convergence error in an image screen peripheral part by forming side beam passing holes eccentric in the direction for separating from the gun axis in either one of opposed surfaces of an intermediate electrode and a constant voltage electrode of a main lens part. CONSTITUTION:Electron beams 16G, 16B and 16R emitted from cathodes K are converged on a phosphor screen by a lens part composed of plural electrodes. In the electron gun 17, dynamic focus voltage V0 is impressed on third and fifth grids G3 and G52 of a sub-lens part, and constant positive electrode voltage Eb is superimposed and impressed on a sixth grid G6 of a main lens part, and voltage whose pressure is divided by a resistor 18 is superimposed and impressed on intermediate electrodes GM1 and GM2 and a fifth grid G51. A pair of side beam passing holes eccentric in the arrangement direction to a pair of side beam passing holes of the other electrodes, are formed in either one of opposed surfaces of the intermediate electrode GM2 and the sixth grid G6. Thereby, an excellent quality image can be displayed over the whole image screen area by a color picture tube.
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公开(公告)号：JPH076709A
公开(公告)日：1995-01-10
申请号：JP31764493
申请日：1993-12-17
Applicant: TOSHIBA CORP
Inventor： SUGAWARA SHIGERU , KIMIYA JUNICHI , KANBARA EIJI
Abstract: PURPOSE:To provide a high resolution and performance cathode-ray tube. CONSTITUTION:A cathode-ray tube is provided with an electron gun 21 having a main electron lens wherein three electron beams in line arrangement are converged on a phosphor screen 1, an electric resistor arranged in a cathode ray tube, and a deflection device 8. The main electron lens is at least composed of a first electron lens and a second electron lens formed nearer to a phosphor screen than the first lens. The first electron lens is formed of a first electrode G6, wherein voltage varied in synchronization with the deflection quantity of an electron beam is supplied from outside the tube, and at least a second electrode G5 to which the voltage is supplied via the electric resistor, and fluctuating voltage is divided by electrostatic capacitance between the first and second electrodes to be overlapped with the voltage at the second electrode. When the electron beam is not deflected by a deflection device, the first and second electrodes have nearly the same voltage, and a potential difference is produced according to the deflection of an electron beam, between the first and second electrodes to operate the second electron lens.
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公开(公告)号：JPH05166468A
公开(公告)日：1993-07-02
申请号：JP33304591
申请日：1991-12-17
Applicant: TOSHIBA CORP
Inventor： SUGAWARA SHIGERU , KANBARA EIJI
Abstract: PURPOSE:To improve a shape of a beam spot on a screen so as to obtain high resolution by forming a four-pole lens of individually acting substantially relating to three electron beams. CONSTITUTION:An electron lens part of forming a 4-pole lens, wherein focusing action relating to three electron beams is different in a direction of arranging the three electron beams and in a direction vertical to this arranging direction, is provided in a main electron part of an electron gun 26. This electron lens part comprises an electrode G3 formed of one-line arranged large holes 30B, 30G, 30R and a small hole 31 of diameter smaller than that of these large holes to overlap therewith with the arranging direction serving as a major bore and an electrode G4 formed with a rectangular opening hole 32 of equal diameter to the major bore in the arranging direction of the electrode G3. A 4-pole lens, wherein relating to a diameter in a direction at a right angle to a direction of arranging three electron beams of the large hole 30 in the electrode G3, the diameter of the small hole 31 is small in the same direction to permeate potential largely through the large hole 30 in the inside of the electrode G3 and to substantially individually act relating to the three electron beams with potential of permeating the inside of the electrode G4, can be formed.
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