公开(公告)号：JPH07147135A

公开(公告)日：1995-06-06

申请号：JP29286993

申请日：1993-11-24

Applicant: TOSHIBA CORP

Inventor： KADOKAWA SATOSHI ,  NAKAMURA MICHIO ,  JO KATSUYOSHI

IPC: H01J9/227

Abstract: PURPOSE:To reduce the lateral irregularities of a stripe phosphor layer or light absorbing layer. CONSTITUTION:In an exposing method for forming the phosphor screen of a color picture tube in which a zone shutter 30 having an opening long in the direction orthogonal to the arrangement direction of electron beam passing holes arranged through the bridge of a shadow mask 4 is arranged between the shadow mask 4 and a light source 20, and the phosphor screen is formed by a partial exposing method for moving the zone shutter 30 in the arrangement direction of the electron beam passing holes, the zone shutter is formed by combining a plurality of shutters 37a, 37b different in opening form and moving speed. The opening form obtained by the combination of the shutters is changed synchronously with the inclination of the light source.

公开(公告)号：JPH06139930A

公开(公告)日：1994-05-20

申请号：JP29060392

申请日：1992-10-29

Applicant: TOSHIBA CORP

Inventor： NAKAMURA MICHIO ,  SONE TOSHIHISA ,  KADOKAWA SATOSHI ,  JO KATSUYOSHI

IPC: H01J9/227

Abstract: PURPOSE:To restrain the occurrence of rust for reducing a phosphor screen defect, and improve breakdown voltage characteristics of a color cathode-ray tube by electrically connecting a metal member having higher ionization tendency than iron to a support seat made of soft steel material. CONSTITUTION:A support seat 30 for positioning and supporting a panel 1 mainly comprises a soft steel material (iron material) as a base material, and the required section thereof is applied with paint. A part of the seat 30 is not applied with the paint, and the base material is exposed. Also, the lower side of the seat 30 is fitted with a metal block 36 (zinc block) mainly comprising zinc having higher ionization tendency than iron constituting the base material. In this case, when the block 36 having higher ionization tendency than iron as the constituent element of the seat 30 is electrically connected to the seat 30, the block 36 corrodes faster than the seat 30. Also, electrons generated at the time of the appearance of cation are supplied to the iron constituting the seat 30. As a result, the occurrence of rust on the seat 30 is restrained, thereby reducing a phosphor screen defect. At the same time, the breakdown voltage characteristics of a cathode-ray tube can be improved.

公开(公告)号：JPH02183934A

公开(公告)日：1990-07-18

申请号：JP263689

申请日：1989-01-09

Applicant: TOSHIBA CORP ,  TOSHIBA ELECTRONIC DEVICE ENG

Inventor： NAKAMURA MICHIO ,  TOKITA KIYOSHI ,  SONE TOSHIHISA ,  FUKUOKA AKIRA

IPC: H01J9/227

Abstract: PURPOSE:To obtain a color picture tube generating no color drift on a screen by exposing an exposed layer with the displacement of a shadow mask against a panel by the preset quantity in the downward direction when the color picture tube is operated with its tube axis kept horizontal. CONSTITUTION:A displacing means 40 is provided on an exposing device, and a photosensitive film 18 and a phosphor slurry layer formed on the inner face of a panel 1 are baked via a shadow mask 6. The shadow mask 6 is forcibly displaced by the preset quantity in the downward direction of the panel side 44a when a color picture tube is operated with its tube axis kept horizontal for exposure, thus a phosphor screen is formed. When the tube axis is made vertical (panel is made horizontal), the matching relationship between three-color phosphor dots of the phosphor screen and the shadow mask is drifted, but when the picture tube is incorporated in a television set with the tube axis kept horizontal, the positional relationship between the three-color phosphor dots of the phosphor screen and the shadow mask becomes the same state as that when the photosensitive film 18 and the phosphor screen slurry layer are baked, and a picture tube generating no color drift is obtained.

公开(公告)号：JPS63304549A

公开(公告)日：1988-12-12

申请号：JP32373387

申请日：1987-12-23

Applicant: TOSHIBA CORP

Inventor： TAKAHASHI TORU ,  NAKAMURA MICHIO ,  FUJIWARA TAKESHI ,  YAMAZAKI HIDETOSHI ,  TOGE HIDENARI

IPC: H01J29/02 ,  H01J29/07 ,  H01J29/82 ,  H01J29/86

Abstract: PURPOSE:To provide good reproductivity in fitting/removal of a shadow mask by forming the inner side face at each corner of a skirt of a panel with a smaller radius of curvature than that of the outer side face at the same part, and furnishing a panel pin on the diagonal of the panel at the inner side face of the same corner. CONSTITUTION:A plane 33 having a mounting surface 36 intersecting in right angle with the axis of a panel pin 10 is furnished at each corner of the skirt 2 of a panel 30, and the pin 10 is mounted at the mounting surface 36. At the time of forming a fluorescent screen, flow of excessive fluorescent substance slurry exhausted from the corner can be changed to prevent attachment of fluorescent substance to the pin 10. That is, the surface area of the mounting surface 36 can be set off wider, and the fluorescent substance slurry flows in such dispersion as going apart from the pin 10. A rudge is formed between the mounting surface 36 and each panel edge, and the fluorescent substance slurry flows concentrated on this part, that should prevent attachment of the fluorescent substance to the pin 10. This should prevent drop of the reproductivity in fitting of a shadow mask to be caused by attachment of fluorescent substance.

公开(公告)号：JPS63158731A

公开(公告)日：1988-07-01

申请号：JP30399286

申请日：1986-12-22

Applicant: TOSHIBA CORP

Inventor： YAMAZAKI HIDETOSHI ,  NAKAMURA MICHIO ,  FUJIWARA TAKESHI ,  TAKAHASHI TORU

IPC: H01J29/02 ,  H01J29/07

Abstract: PURPOSE:To prevent occurrence of longtime purity drift by fixing a spring member, which has a nearly V-shaped cross section and supports four corners of a mask frame, on the mask frame through a spacer. CONSTITUTION:When a color cathode-ray tube is operated and its temperature rises, almost no thermal expansion occurs at a shadow mask 18' part because this part is made of a material small in thermal expansion coefficiency, but a mask frame 19, extends peripherally to be disposed approximately near to a side wall of a panel 11 because it is large in thermal expansion coefficiency. Simultaneously, a spring member 30 with a V-shaped cross section is pressed and deformed, and a fixing part 33' facing the frame 19' of the member 30 is fixed on the frame 19' through a spacer 34, and besides a connection part of a fitting part 32' to the fixed part 33, is not in contact with the frame 19', and so the fixed part 33, is bent. Therefore, without thermal expansion of the frame 19, being propagated directly to the fitting part 32, part of the thermal expansion of the frame 19' is absorbed due to bending of the fixed part 33'. Resultingly, the amount wherein the mask 18' is shifted in the direction of the fluorescent screen 15 is decreased.

公开(公告)号：JPS62217544A

公开(公告)日：1987-09-25

申请号：JP5950986

申请日：1986-03-19

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  KIDA KINJI ,  NAKAMURA MICHIO

IPC: H01J29/76

Abstract: PURPOSE:To suppress temperature rise of a magnetic material by providing a coating having a larger thermal radiation rate than the magnetic material on the surface of the magnetic material consisting a deflection device. CONSTITUTION:A magnetic piece 50 consists, for example, of a silicone steel plate and on the surface of said silicone steel plate a ceramic layer 10 is formed. Said ceramic layer is formed by a method wherein suspension of silicon containing zirconium (ZrSiO4) and an alkoxide compound of zirconium, for example, ZrSi(OC4H9)4 is applied as a filler by a spraying method to form an about 10mum thick coating followed by heat treatment. Thereby, temperature rise of a magnetic material can be suppressed.

公开(公告)号：JPS62126527A

公开(公告)日：1987-06-08

申请号：JP26601485

申请日：1985-11-28

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  NAKAMURA MICHIO ,  URATA HIROSHI

IPC: H01J29/02 ,  H01J29/07 ,  H01J31/20

Abstract: PURPOSE:To restrain the color purity of an image plane from deteriorating, by supsending a shadow mask frame on a panel side wall with a fine strip elastic member, and setting an angle made between the movable part and a tube axis and another angle made between an electron beam and the tube axis, to the specified relationship. CONSTITUTION:A mask frame 17 supporting a shadow mask 15 of a color picture tube is suspended on a stud 10 of the side wall of a panel 1 by a fine strip elastic member 22. At this juncture, when a thermal expansion coefficient of the mask frame 17 at room temperature or in a range of 200 deg.C is set to alphaf, and that of the shadow mask 15 to alpham as well as an angle made between a movable piece part 22a of the elastic member 22 and a tube axis 20 is set to alpha and that made between an electron beam 24 and the tube axis 20 to beta, respectively, they should be set so as to satisfy a relationship of tan (alpha)>alpham/alphaf.tan(90-beta). And, displacement of the electron beam with thermal expansion in the shadow mask is restrained from occurring. Accordingly, a mislanding quantity is reduced, and reduction in chromatic aberration or the like is promotable.

公开(公告)号：JPS6220224A

公开(公告)日：1987-01-28

申请号：JP15695685

申请日：1985-07-18

Applicant: TOSHIBA CORP

Inventor： URATA HIROSHI ,  NAKAMURA MICHIO ,  TAKENAKA SHIGEO

IPC: H01J29/02 ,  H01J29/07

Abstract: PURPOSE:To intend to improve the shockproofness of the elastic holder and the industrial mass productivity by making the elastic direction of the elastic holder identical or parallel to the bisector of the angle between the both sides of the panel forming its corner part. CONSTITUTION:The elastic holder 8 and the stud pin 10 are generally arranged so as the central axis 24 of the circular cone 11 cut the top off of the stud pin to be perpendicular to the plane of the supporting part of the elastic holder 8. Hence, when the stud pin 10 is planted the elastic direction of the elastic holder 8 is made coincident to the direction of the central axis 24 of the circular cone 11 cut the top off, that is identical to the bisector of the angle between the both sides of the panel forming its corner part. Therefore, the longitudinal and transversal shockproofness in the plane of the glass panel 2 can be made equal. Thereby the shockproofness of the elastic holder 8 can be improved and the color picture tube excellent in the industrial mass productivity and the economic efficiency can be obtained.

公开(公告)号：JPS61267238A

公开(公告)日：1986-11-26

申请号：JP10695485

申请日：1985-05-21

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  SONE TOSHIHISA ,  NAKAMURA MICHIO ,  URATA HIROSHI

IPC: H01J29/02 ,  H01J29/07

Abstract: PURPOSE:To suppress deterioration of color purity such as color shift of picture image while to improve the shock resistance by setting specific relation between the spring constant of resilient member and the force to be applied onto a stud pin upon fitting of the resilient member and the stud pin. CONSTITUTION:The displacement of electron beam when the color picture tube is subjected to shock has close relation with the spring constant K of resilient member 33 and the force F to be applied onto the corresponding stud pin 10. Here, the spring factor Kkg.f/mm of the resilient member 33 and the force Fkg.f to be applied onto the stud pin 10 upon fitting of said member 33 and the stud pin 10 are set such that 1.8

公开(公告)号：JPS59165351A

公开(公告)日：1984-09-18

申请号：JP3743883

申请日：1983-03-09

Applicant: Toshiba Corp

Inventor： TOKITA KIYOSHI ,  SONE TOSHIHISA ,  NAKAMURA MICHIO

IPC: H01J29/86

CPC classification number: H01J29/861 ,  H01J2229/862

Abstract: PURPOSE:To reduce curvature in the vertical direction while suppressing substantially a color shift by setting the specific relations among the curvature including a vertical axis, the curvature including a horizontal axis and the curvature including a diagonal axis of the glass panel inner surface. CONSTITUTION:Assuming that the panel curvature of the screen part in the vertical axis direction (1-2v) is (Rp-v), that of the screen part in the diagonal axis direction (1-2D) is (Rp-D) and that of the screen part in the horizontal axis direction (1-2H) is (Rp-H), it is so constituted that the relations of said panel curvature shall be (Rp-v)

Abstract translation: 目的：通过设定包括纵轴在内的曲率的特定关系，包括水平轴的曲率和包括玻璃面板内表面的对角轴的曲率，来减小垂直方向上的曲率，同时基本上抑制色移。 构成：假设屏幕部分的垂直轴方向（1-2v）的面板曲率为（Rp-v），则对角轴方向（1-2D）的屏幕部分的面板曲率为（Rp-D）， 水平轴方向（1-2H）的屏幕部分为（Rp-H），其面板曲率的关系为（Rp-v）<（Rp-H）<（Rp-H） D）。 因此，作为前一掩模的主要因素的垂直轴方向上的有效部分的掩模曲率（Rm-v）可以接近于掩模曲率（Rm-H）和（Rm-D） 横轴方向或对角轴方向。 对于使用这样的荫罩的彩色显像管，与以往的情况相比，显着地减少了由于电子束的拍摄碰撞引起的荫罩有效部分的热膨胀所引起的掩模隆起量。