公开(公告)号：JPH01209890A

公开(公告)日：1989-08-23

申请号：JP3391588

申请日：1988-02-18

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  NAKANE KAZUNORI ,  INOUE MASACHIKA ,  FUJIWARA TAKESHI

IPC: H01J29/02 ,  H01J29/00 ,  H04N9/29 ,  H04N17/04

Abstract: PURPOSE:To make an unbalanced hysteresis curve different for every one cycle and to eliminate a residual magnetism by passing the alternating transient attenuating current having a relation in which the ratio of a demagnetizing frequency and a vertical deflecting frequency is not an integer to a demagnetizing coil to demagnetize. CONSTITUTION:The demagnetizing coil 14 is disposed at the prescribed position of a cone part 11 side correspondingly to a shadow mask 5 incorporated in a color image receiving tube or a magnetic member such as an internal magnetic shield body 13, an electron beam discharge from an electron gun is deflected by the horizontal and the vertical deflecting magnetic fields of a deflecting yoke 12 to scan a screen and the alternating transient attenuating current is passed to the demagnetizing coil disposed externally of the cone part to demagnetize. I this case, the hysteresis curve 32 generates the unbalance in respective cycles, the unbalanced pattern is changed for every cycle, consequently, the hysteresis curve 32 of the respective demagnetizing cycles is averaged to demagnetize with no generation of the residual magnetism as shown by a point (r).

公开(公告)号：JPH01154443A

公开(公告)日：1989-06-16

申请号：JP31186787

申请日：1987-12-11

Applicant: TOSHIBA CORP

Inventor： INOUE MASACHIKA ,  TOKITA KIYOSHI ,  FUJIWARA TAKESHI ,  NAKANE KAZUNORI

IPC: H01J29/86

Abstract: PURPOSE:To effectively restrain the thermal deformation of a shadow mask by allowing the difference between panel wall thickness on the major axis (X-axis) and panel wall thickness in proximity to the both ends in the minor axis (Y-axis) direction to be maximum at the midsection in the X axial direction of the effective curved surface of a panel. CONSTITUTION:Out of cross sections in parallel with the Y-axis and the Z-aixs in a panel effective arear 33, the difference between wall thickness h1 on the X-axis of a cross section 52 passing through the center O of a panel and wall thickness H1 at the end section in the Y-axis direction, is smaller than the difference between wall thickness h2 on the X-axis of a section 53 in parallel with the Y-axis and the Z-axis at the midsection M in the X-axis direction and wall thickness H2 at the end section in the Y-axis direction. In addition, the difference between wall thickness h3 on the X-axis of a cross section 54 in parallel with the Y-axis and the Z-axis at the end section P of an effective diameter in the X-axis direction and wall thickness H3 at the end section in the Y-axis direction is similarly smaller than the difference between wall thickness h2 on the X-axis of the cross section 53 at the midsection and wall thickness H2 at the end section in the Y-axis direction. Namely, the difference in thickness is maximum at the midsection M. This constitution thereby can prevent effectively purity in color from being deteriorated caused by partial thermal deformation of a shadow mask 36 only by partially changing the form of a curved surface.

公开(公告)号：JPS6454645A

公开(公告)日：1989-03-02

申请号：JP21028787

申请日：1987-08-26

Applicant: TOSHIBA CORP

Inventor： INOUE MASACHIKA ,  TOKITA KIYOSHI ,  SONE TOSHIHISA

IPC: H01J29/86 ,  H01J29/07

Abstract: PURPOSE:To check any thermal deformation in a shadow mask by making the major axial radius of curvature on an effective curved surface smaller in a side in and around a minor axis effective diameter end than the central part and making the diagonal axial end vicinity larger than the major axis effective diameter end vicinity. CONSTITUTION:A shadow mask 36 tructure 32 consists of a rectangular mask frame 34 and a curved shadow mask provided with a lot of through holes, and these through holes are formed in a rectangular area 33 with a slit along a Y-axis direction in response to stripes of a fluorescent screen 30, and this area 33 serves as an effective area for image projection. With the center O of an effective curved surface as a reference point, a major axis is set to an X-axis, a minor axis to a Y-axis and the center axis to a Z-axis, respectively. An X-axial radius of curvature in the minor axis effective diameter end vicinity is made smaller than an X-axial radius of curvature in and around the central part of the effective surved surface, and an X-axial radius of curvature in and around the diagonal effective diameter end is made larger than the X-axial radius of curvature in and around the major axis effective diameter end. Thus, thermal deformation in the shadow mask is checkable.

公开(公告)号：JPS63218126A

公开(公告)日：1988-09-12

申请号：JP5019987

申请日：1987-03-06

Applicant: TOSHIBA CORP

Inventor： INOUE MASACHIKA ,  TOKITA KIYOSHI ,  NAKANE KAZUNORI

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

Abstract: PURPOSE:To keep the correction for purity drift well enough for a long time by making the angle between the tube axis and a movable piece apart smaller than the angle between the tube axis and the straight line connecting the end part of the movable piece at the frame side to a stud-pin in the cross section of a spring component in the diagonal axis direction. CONSTITUTION:A shadow-mask 12 is fixed by welding to a frame 13. A spring component 24 is made of three components welded each other: the one is a fixed part 21 fixed by welding to the frame 13, and the other: are a connecting part 23 which a stud-pin 14 is fitted in the hole of and a movable piece part 22 connecting the fixed part 21 to the connecting part 23. The angle a between the tube axis and the straight line 35 connecting the end part 34 of the movable piece part 22 at the frame side to the center of the top of the stud-pin 14 is made larger than the angle beta between the tube axis and the movable piece part 22. Thereby purity drift is able to be efficiently improved for a long time without making a great change in the conventional spring component.

公开(公告)号：JPS6332840A

公开(公告)日：1988-02-12

申请号：JP17557986

申请日：1986-07-28

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  TAKAHASHI TORU

IPC: H01J29/76

Abstract: PURPOSE:To improve reliability without heat generation of a core even at high horizontal deflection frequency, by forming a core, whose thermal radiation factor is higher than that of the core, on the surface of the core composing a deflecting device. CONSTITUTION:A deflecting device 1 for a color cathode-ray tube comprises at least the following units: a conical mold 3 made of synthetic resin such as polypropylene internally equipped with a horizontal deflecting coil 2, a toroidal core 4, and a vertical deflecting coil 5 wound around this core. This core 4 is made of ferrite, with a ceramic layer 6 formed thereon. Such formation of the ceramic layer 6 on the surface of the core 4 suppresses a rise in temperature of the core 4, making it possible to obtain the deflecting device which can be stably operated with less heat generation even at high horizontal deflection frequency.

公开(公告)号：JPS61288350A

公开(公告)日：1986-12-18

申请号：JP12826085

申请日：1985-06-14

Applicant: TOSHIBA CORP

Inventor： TOKITA KIYOSHI ,  NAKANE KAZUNORI

IPC: H01J29/07

Abstract: PURPOSE:To suppress an influence based on a doming phenomenon, by providing a lowly-electroconductive layer whose temperature dependence of the reciprocal rhoof the electric conductivity is substantially zero or positive in a range from the room temperature to 200 deg.C and which is located on the main surface of a shadow mask in the face of an electron gun. CONSTITUTION:A material, whose main constituent is a lead borated glass or the like containing Ag, is applied by spraying or the like to the electron gun side of the shadow mask 7 of a color picture tube having an inline-type electron gun 6 and is thereafter kept at a maximum temperature of 450 to 600 deg.C in a furnace for 30min or more to crystallize the lead borate glass to provide a lowly-electroconductive layer whose temperature dependence of the reciprocal (resistivity rho) of the electric conductivity 1/rho is substantially zero or positive in a range from the room temperature to 200 deg.C. As a result, an electron beam is appropriately deflected by negative charge generated on the electron gun side of the shadow mask 7, to prevent chromatic aberration or the like from occurring due to a doming phenomenon.

公开(公告)号：JPS59207542A

公开(公告)日：1984-11-24

申请号：JP8013083

申请日：1983-05-10

Applicant: Toshiba Corp

Inventor： TOKITA KIYOSHI ,  SONE TOSHIHISA ,  KIDA KINJI

IPC: H01J29/07

CPC classification number: H01J29/07 ,  H01J2229/0722

Abstract: PURPOSE:To reduce a temperature difference between the center and periphery of mask body and suppress doming by providing a heat reflecting layer on the surface of the area where the body of shadow mask of cathode ray tube and the frame are mutually facing. CONSTITUTION:The shadow mask of a cathode ray tube is formed by welding a mask body 15 consisting of the effective surface provided with many through holes 10 and a skirt area 18 provided in the periphery thereof to a frame 17 where a heat reflecting layer 20 consisting of the nickel plated layer in the thickness of 10-20mum is provided on the internal surface 17a and external surface 17b facing to the periphery 15a which has almost the L-shaped section and includes the skirt area 18 of mask body 15. Accordingly, when the shadow mask is heated through collision of electron beam, heat radiation to the frame 17 is reduced and thereby temperature difference between the center and periphery of the mask body 15 can be reduced and doming can also be eased and color shift be prevented.

Abstract translation: 目的：通过在阴极射线管和框架的荫罩体相互面对的区域的表面上设置热反射层，来降低面罩主体的中心与周围的温度差，抑制穹隆。 构成：阴极射线管的荫罩是通过将由设置有多个通孔10的有效表面和设置在其周边的裙部区域18组成的掩模体15焊接到框架17而形成的，其中，热反射层20 的厚度为10-20μm的镀镍层设置在内表面17a和面向具有几乎为L形截面的周边15a的外表面17b上，并且包括荫罩主体15的裙部区域18.因此，当 阴影掩模通过电子束的碰撞而被加热，对框架17的热辐射减少，从而可以减小掩模体15的中心和周边之间的温度差，并且还可以缓和穹顶，并且防止色移。

公开(公告)号：JPS59180939A

公开(公告)日：1984-10-15

申请号：JP5351183

申请日：1983-03-31

Applicant: Toshiba Corp

Inventor： TOKITA KIYOSHI

IPC: H01J29/86

CPC classification number: H01J29/861 ,  H01J2229/862

Abstract: PURPOSE:To make the face portion flatter thereby to provide the face portion giving nicer impression, by adapting the radii of curvature from the center of the face portion to the ends of the diagonal axis, the horizontal axis, and the vertical axis to be specified values. CONSTITUTION:If the radii of curvature of the internal surface of the face portion in the directions of the vertical axis, the horizontal axis, and the diagonal axis are respectively represented by RV, RH, and RD, and half the maximum effective lengths of the circumferential frame of the internal surface of the face portion in the directions of the vertical axis, the horizontal axis, and the diagonal axis are respectively represented by SV, SH, and SD, then the degree of the variations in the curvature or the differences in the distances in the longitudinal direction of the cathode ray tube between the center of the face portion and the ends of the diagonal axis, the horizontal axis, and the vertical axis are adapted to be respectively as specified by the formulas I to III. Then, it is made possible to provide a cathode ray tube having the ratios of SV to SH to SD made to be substantially 3:4:5 and the face portion made flatter.

Abstract translation: 目的：为了使脸部部分变平，通过使曲面的半径从面部的中心适应于对角轴，水平轴和要指定的垂直轴的端部，从而使面部赋予更好的印象 值。 构成：如果面部内表面在垂直轴，水平轴和对角轴的方向上的曲率半径分别由RV，RH和RD表示，并且最大有效长度的一半 表面部分的内表面在垂直轴，水平轴和对角轴的方向上的圆周框架分别由SV，SH和SD表示，然后曲率或偏差的变化程度 在阴极射线管的纵向方向上的面部分的中心与对角线轴线，水平轴线和垂直轴线的端部之间的距离分别适用于通式I至III所示。 然后，可以提供一种阴极射线管，该阴极射线管具有基本上为3:4:5的SV至SH与SD之比，并且使面部变得平坦。

公开(公告)号：JPS59165352A

公开(公告)日：1984-09-18

申请号：JP3743983

申请日：1983-03-09

Applicant: Toshiba Corp

Inventor： TOKITA KIYOSHI

IPC: H01J29/86

CPC classification number: H01J29/861 ,  H01J2229/862

Abstract: PURPOSE:To obtain a cathode-ray tube having a more levelled face part curved face by a method in which the specific relations are set among the radiuses of curvature inclusive of the vertical axis direction, horizontal axis direction and diagonal axis direction of the face part inner surface, the complex radiuses of curvature of the peripheral frame from the vertical axis end to the diagonal axis end and the complex radiuses of the outer peripheral frame from the horizontal axis end to the diagonal axis end. CONSTITUTION:The radiuses of curvature in the vertical axis direction, horizontal axis direction and the diagonal axis direction of the face part inner-and-outer surfaces are made to be RV, RH and RD in the inner surface respectively, while a half of the maximum effective length including the vertical axis, a half of the maximum effective length including the horizontal direction and a half of the maximum effective length including the diagonal axis of the outer frame are made to be SV, SH and SD respectively. Further, when the complex radius of curvature from the vertical axis end of the diagonal axis end of the face part is made to be DELTAL, equally the complex radius of curvature from the horizontal axis end to the diagonal axis end is made to be DELTAS, the value of DELTAL, and DELTAS can be expressed by the formulas (1) and (2). In order to not deteriorate explosion-proofness without increasing the thickness of the glass panel so much, it is effective to make DELTAL and DELTAS 0.04

Abstract translation: 目的：为了获得具有更平整的面部曲面的阴极射线管，其方法是在包括垂直轴方向，水平轴方向和对角轴方向在内的曲率半径之间设定特定关系 内表面，周边框架的从垂直轴端到对角轴端的曲率的复合半径以及外周框架从水平轴端到对角轴端的复半径。 构成：将面部内外表面的垂直轴方向，水平轴方向和对角线轴方向的曲率半径分别设定为内表面的RV，RH，RD，而半 包括垂直轴的最大有效长度分别为SV，SH和SD分别为包括水平方向的最大有效长度的一半和包括外框的对角轴的最大有效长度的一半。 此外，当从面部对角轴端部的垂直轴端部的曲率半径成为DELTAL时，从水平轴端部到对角线轴端部的复曲率半径等于DELTAS， DELTAL和DELTAS的值可以由公式（1）和（2）表示。 为了不使玻璃面板的厚度增加而不会劣化防爆性，使DELTAL和DELTAS 0.04 <= DELTAL <= 0.08和0.03 <= DELTAS <= 0.06是有效的。

公开(公告)号：JPS59165349A

公开(公告)日：1984-09-18

申请号：JP3743683

申请日：1983-03-09

Applicant: Toshiba Corp

Inventor： TOKITA KIYOSHI ,  SONE TOSHIHISA ,  NAKAMURA MICHIO

IPC: H01J29/24 ,  H01J29/86

CPC classification number: H01J29/861 ,  H01J2229/862

Abstract: PURPOSE:To obtain a cathode-ray excellent in mechanical strength by providing the specific relations respectively in height of the skirt part of the end part forming substantially a rectangular frame of the glass panel face part and in thickness among the vertical axis direction, horizontal axis direction and diagonal axis direction near the rectangular frame. CONSTITUTION:The height of the skirt parts in the respective axial directions of the face part, CHV, CHH and CHD as well as the thickness tv, tH and tD near the rectangular frames in the respective axial directions of the face part are so constituted as to have the relations CHV =tH>= tD. In order to constitute the height of the skirt parts in the respective directions of the glass panel and the thickness near the rectangular frames in the respective directions of the face part in this way, it is effective to make the outer surface radiuses of curvature Rv, RH and RD as well as the inner surface radiuses of curvature R'v, R'H and R'D in the respective directions of the face plate to be Rv

Abstract translation: 目的：为了获得机械强度优异的阴极射线，通过分别提供形成玻璃面板部分的大致矩形框架的端部的裙部的高度和垂直轴方向之间的厚度的特定关系 方向和对角轴方向靠近矩形框架。 构成：面部的各个轴向的裙部的高度，CHV，CHH，CHD以及面部的各轴方向上的矩形框架附近的厚度tv，tH，tD的高度构成为 具有CHV <= CHH <= CHD，进一步tv> = tH> = tD的关系。 为了以这种方式构成玻璃面板的各个方向上的裙部的高度和矩形框架在面部的各个方向附近的厚度，可以使外表面的曲率半径Rv， RH和RD以及面板的各个方向上的曲面R'v，R'H和R'D的内表面半径Rv