WO2003071573A1 - Tube cathodique couleur - Google Patents

Tube cathodique couleur Download PDF

Info

Publication number
WO2003071573A1
WO2003071573A1 PCT/JP2003/001621 JP0301621W WO03071573A1 WO 2003071573 A1 WO2003071573 A1 WO 2003071573A1 JP 0301621 W JP0301621 W JP 0301621W WO 03071573 A1 WO03071573 A1 WO 03071573A1
Authority
WO
WIPO (PCT)
Prior art keywords
cathode ray
ray tube
panel
color
selection electrode
Prior art date
Application number
PCT/JP2003/001621
Other languages
English (en)
Japanese (ja)
Inventor
Takayuki Shimamura
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2003071573A1 publication Critical patent/WO2003071573A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0705—Mounting arrangement of assembly to vessel
    • H01J2229/0711—Spring and plate (clip) type

Definitions

  • the present invention relates to a color cathode ray tube, and more particularly to an improvement of a support member for fixing a color selection electrode assembly to a panel.
  • the color cathode ray tube has a color selection electrode such as a shadow mask or an aperture grill.
  • the color selection electrode is held by the frame to form a color selection electrode structure, for example, a shadow mask structure.
  • the shadow mask structure is fixed to the inner wall of the panel via a support member.
  • the color cathode ray tube is operated, the electron beam collides with the shadow mask, and the shadow mask and the frame holding it are thermally expanded.
  • the aperture of the shadow mask causes a slight displacement toward the periphery of the shadow mask, which causes a color shift on the screen.
  • a technique is generally used in which the support member has a function of correcting the position of the opening of the shadow mask.
  • a spring having a substantially V-shape is described in Japanese Patent Application Laid-Open No. 62-43232.
  • Fig. 5 shows an enlarged cross-sectional view of the spring part of a conventional color cathode ray tube using this technology.
  • Reference numeral 4 denotes a panel having a fluorescent screen 9 inside.
  • Reference numeral 3 denotes a shadow mask structure, which has a structure in which a shadow mask 2 is held in a frame 10.
  • the shadow mask structure 3 is supported by a panel 4 by a substantially V-shaped spring 1.
  • the spring 1 includes an elastic movable part la and a fixed part 1b. Fixed part lb, frame 10 Is welded to.
  • the distal end of the movable portion 1a forms a locking portion 1c, and the locking portion lc is locked to a panel pin 5 fixed to the panel 4.
  • 2a indicates the periphery of the opening area of the shadow mask 2.
  • 6 is the axis of the color cathode ray tube
  • 7 is the electron beam.
  • the angle of inclination of the spring 1 must be 45 ° or more because the angle ⁇ is 45 °.
  • the frame 10 is required to have high rigidity, and accordingly, the weight increases. Therefore, when an external impact is applied to the frame 10, the spring 1 may receive an excessive bending moment and may be plastically deformed. Disclosure of the invention
  • the present invention provides a support member having a function of correcting a color shift caused by thermal expansion of a color selection electrode assembly, by suppressing attachment / detachment in a manufacturing process and plastic deformation caused by an external impact force. It is intended to improve the application so that it can be easily applied to a color cathode ray tube having a high definition and flat screen.
  • a color cathode ray tube according to the present invention includes a panel on which a fluorescent screen is formed, a funnel joined to the panel, an electron gun provided on the funnel, and a color selection electrode installed facing the fluorescent screen. And a support member having a substantially V shape for fixing the color selection electrode assembly to the panel.
  • the support member has elasticity, and a tip of a fixed portion, which is one of the substantially V-shaped arms, is fixed to a side surface of the color selection electrode assembly, and a tip of a movable portion, which is the other arm, is the arm. Locked to the panel.
  • the substantially V-shaped apex portion of the support member is located on the tube axis side with respect to a side surface of the color selection electrode assembly where the fixing portion is fixed.
  • the aperture position of the color selection electrode is effectively corrected, and a highly accurate color cathode ray tube is realized. Furthermore, even when a high-rigidity frame is used, the bending moment received by the support member is small, and the screen can be easily flattened.
  • the substantially V-shaped apex portion may be arranged to face the panel.
  • a concave portion is formed on a side surface of the color selection electrode assembly, the concave portion being recessed on the tube axis side from a surface on which the fixing portion of the support member is fixed, and a substantially V-shaped apex portion of the support member is formed by the concave portion.
  • the substantially V-shaped apex portion is shifted toward the tube axis with respect to the side surface of the color selection electrode assembly to which the fixing portion is fixed. it can.
  • the fixed part and the movable part of the support member are each bent, and the bend is formed such that the apex side is displaced toward the tube axis side.
  • FIG. 1 is a cross-sectional view of a color cathode ray tube according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing an enlarged part of the color cathode ray tube of FIG. 1
  • FIG. 3A is a color cathode ray tube of FIG. An enlarged sectional view of a portion of a spring supporting a shadow mask structure in the pipe,
  • FIG. 3B is an enlarged cross-sectional view of a spring supporting the shadow mask structure in the conventional color cathode ray tube.
  • FIG. 4A is a perspective view of a shadow mask structure having a curved shadow mask
  • FIG. 4B is a perspective view of a shadow mask structure having a tensioned and supported shadow mask
  • FIG. 5 is an enlarged sectional view of a part of a conventional color cathode ray tube.
  • BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
  • FIG. 1 is a sectional view of a color cathode ray tube according to the present embodiment.
  • the color cathode ray tube has a flat panel 4 and a funnel 8 joined to the panel 4.
  • a fluorescent screen 9 is formed on the inner surface of panel 4.
  • the shadow mask structure 3 includes a shadow mask 2 having a large number of apertures formed on the surface thereof, and a substantially rectangular frame 10a for holding the shadow mask 2 by applying tension.
  • the frame 10 a is fixed to the panel 4 via a spring 11 and a panel pin 5 at substantially the center of both sides in the longitudinal direction of the panel 4.
  • the neck 13 of the funnel 8 is provided with an electron gun (not shown).
  • the electron beam 7 emitted from the electron gun passes through the aperture of the shadow mask 2 and irradiates the fluorescent screen 9, whereby an image is displayed on the color cathode ray tube.
  • Reference numeral 6 denotes a tube axis, which is perpendicular to the phosphor screen 9 and passes through almost the center of the panel 4.
  • FIG. 2 shows an enlarged cross-sectional view of a portion where the shadow mask structure 3 is fixed to the panel 4.
  • a concave portion 12 is formed on the side surface of the frame 10 a so as not to block the electron beam 7.
  • the shadow mask structure 3 is fixed to the panel 4 via a substantially V-shaped spring 11.
  • the spring 11 has a structure in which one end of two bent plate-like members is welded to form a vertex 14. The direction parallel to the tube axis 6 through the vertex 14 is indicated by 6a.
  • the plate forming one arm forms the movable portion 11a, and the plate forming the other arm forms the fixed portion 11b.
  • the movable portion 11a and the fixed portion 11b are bent at the center in the longitudinal direction.
  • the fixing portion 11b is fixed to the side surface of the frame 10a at the welding point 15 on the tip side of the bent portion.
  • the movable portion 11a is locked to the panel pin 5 at a locking portion 11c that forms a distal end side of the bent portion.
  • the movable part 11a has an inclination angle of ⁇ 1 with respect to the direction 6a.
  • the fixing part 1 lb forms a corner 3 with the direction 6 a on the side of the vertex part 14 from the bent part.
  • the top portion 14 enters the concave portion 12 and is shifted to the pipe shaft 6 side from the welding point 15.
  • FIG. 3A is a cross-sectional view around the spring 11.
  • FIG. 3B is a cross-sectional view around the spring 1 in the case of the conventional technology.
  • the members and angles indicated by the respective reference numerals correspond to those indicated by the same reference numerals in FIGS. 2 and 5, respectively.
  • the inclination angle ⁇ 1 of the spring 11 in the present embodiment shown in FIG. 3A is set equal to the inclination angle 2 of the conventional spring 1 shown in FIG.
  • the distance between the fixed portion 11 b of the spring 11 and the locking portion 11 c is X (mm).
  • Y (mm) be the offset amount of the spring 11, that is, the distance between the apex 14 of the substantially V-shaped spring 11 and the pipe shaft side from the welding point 15.
  • the thickness of the fixed part 1 1b is t (mm).
  • the length Z 1 of the movable portion 11 a is
  • the amount of plastic deformation of the spring 11 when the shadow mask assembly 3 is attached to and detached from the panel 4 is inversely proportional to the length of the movable portion 11a. 11 plastic deformation is small. Therefore, even if the shadow mask structure 3 is repeatedly attached and detached, the accuracy of the attachment position is kept high.
  • the fixed portion 11b since the fixed portion 11b is inclined at an angle of / 3 from the pipe axis at the vertex portion 14 side (see FIG. 2), the fixed portion 11b at the vertex portion 14 side of the fixed portion 11b is formed.
  • the cross-sectional secondary moment is (lZcos / 3) three times that of the prior art. Therefore, in the present embodiment, the amount of bending of the fixed portion 11b when receiving an external impact of the same magnitude is reduced, so that the mounting position of the shadow mask structure 3 is less likely to shift.
  • the concave portion 12 provided on the side of the frame 10a must be deepened. Can be. The deeper the concave portion 12 is, the larger the offset amount of the spring 11 can be, and the more effective the correction of the color shift of the screen can be.
  • This embodiment can be applied to various types of color selection electrode assemblies.
  • a form in which a shadow mask 16 formed into a curved surface is supported by a substantially rectangular frame 10a can be applied.
  • a configuration in which a shadow mask 17 to which tension is applied in the direction of the arrow is supported by a pair of upper and lower frames 18 and an auxiliary frame 19 supporting the same is also applicable.
  • a space is formed between the shadow mask 17 and the auxiliary frame 19. Therefore, the spring 11 as shown in FIG.
  • the spring is not limited to the longitudinal side surface of the frame, and may be arranged at any portion such as a corner portion as long as it is stably fixed.
  • the number of springs used can be changed as appropriate according to the size and weight of the shadow mask structure and its mounting position on the panel.
  • the spring 11 is not limited to a shape in which a plate-like body is bent at two positions as in the present embodiment. As long as it is substantially V-shaped, for example, a shape bent at three or more places may be used, or a shape bent in a bow may be used.
  • the invention is not limited to the case where a shadow mask is used as a color selection electrode as described in the present embodiment, but the present invention uses a color selection electrode having another structure such as an aperture grill having slit-shaped holes. The same applies to color cathode ray tubes.
  • a color cathode ray tube having a screen size of 34 inches (80 cm), a shadow mask pitch of 0.58 mm, and a thickness of 1.8 mm was manufactured.
  • the frame of the shadow mask structure was 50 mm high and 1.8 mm thick.
  • a recess 12 having a height of 15 mm, a width of 35 mm, and a depth of 3 mm was provided on the side surface of the corner of the frame 10a.
  • the spring 11 has a movable part 11a including a locking part 11c having a width of 30 mm and a wall thickness of 0.5 mm, and a fixed part 12c having a width of 30 mm and a wall thickness of 1.4. mm. Positioning the top 14 in the recess 12 allows the pipe shaft 6 to be The spring 11 was attached to a part of the corner of the frame 10a.
  • the distance X was 30 mm, and the offset amount Y was 2.4 mm.
  • the shift amount of the spot position of the electron beam from the reference value was 5 m at the periphery of the opening area of the shadow mask.
  • the shift amount of the fixed position of the shadow mask structure 3 from the reference value was 10 m, which was suppressed to the allowable value of 20 or less for quality assurance.
  • the shift amount of the electron beam was 10 m, which was suppressed to 30 m or less, which is the allowable value for quality assurance.
  • the shift amount of the spot position of the electron beam from the reference value was 5 m at the periphery of the aperture region, as in the example based on the embodiment.
  • the shift amount of the fixed position of the shadow mask structure 3 from the reference value was 50 m, which exceeded the allowable value of 20 m for quality assurance.
  • the shift amount of the electron beam was 40 m, exceeding the allowable value of 30 xm, which can guarantee the quality.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

L'invention porte sur un tube cathodique couleur comprenant un panneau (4) revêtu d'une surface (9) fluorescente, un queusot (8), un canon à électrons (13), une structure d'électrode (3) de sélection de couleur disposée face au panneau, et un support (11) en V reliant la structure (3) au panneau (4). Ledit support (11) est élastique et fixé par la branche fixe du V à la surface latérale de la structure (3), et par la branche mobile du V au panneau (4). Le sommet du V est décalé latéralement par rapport à l'axe du tube au-delà de la surface latérale de la structure (3) à laquelle est fixée la branche fixe du V. Cette disposition permet une correction efficace de la position d'ouverture de l'électrode de sélection de couleur, et donc la réalisation d'un tube cathodique couleur de haute précision. En outre, le moment de torsion du support est peu important même lorsqu'on utilise un cadre très rigide facilitant l'aplatissement du tube.
PCT/JP2003/001621 2002-02-19 2003-02-17 Tube cathodique couleur WO2003071573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002042093A JP2003242900A (ja) 2002-02-19 2002-02-19 カラー陰極線管
JP2002/42093 2002-02-19

Publications (1)

Publication Number Publication Date
WO2003071573A1 true WO2003071573A1 (fr) 2003-08-28

Family

ID=27750485

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/001621 WO2003071573A1 (fr) 2002-02-19 2003-02-17 Tube cathodique couleur

Country Status (2)

Country Link
JP (1) JP2003242900A (fr)
WO (1) WO2003071573A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007027183A1 (fr) * 2005-08-30 2007-03-08 Thomson Licensing Ressort servant a raccorder un cadre support aux goujons d’un panneau dans un tube cathodique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146917Y1 (fr) * 1968-11-01 1976-11-12
JPS63158731A (ja) * 1986-12-22 1988-07-01 Toshiba Corp カラ−受像管
JPS63160135A (ja) * 1986-12-24 1988-07-02 Toshiba Corp カラ−受像管

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146917Y1 (fr) * 1968-11-01 1976-11-12
JPS63158731A (ja) * 1986-12-22 1988-07-01 Toshiba Corp カラ−受像管
JPS63160135A (ja) * 1986-12-24 1988-07-02 Toshiba Corp カラ−受像管

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007027183A1 (fr) * 2005-08-30 2007-03-08 Thomson Licensing Ressort servant a raccorder un cadre support aux goujons d’un panneau dans un tube cathodique

Also Published As

Publication number Publication date
JP2003242900A (ja) 2003-08-29

Similar Documents

Publication Publication Date Title
WO2003071573A1 (fr) Tube cathodique couleur
EP0878821A2 (fr) Tube a rayons cathodiques avec des éléments de support pour le cadre de masque d'ombre
KR100418548B1 (ko) 칼라음극선관과 마스크프레임
KR100778398B1 (ko) 플랫 마스크와 이 마스크의 조립 방법 및 이 방법에 의해제조된 텐션 마스크 조립체
JP3934435B2 (ja) カラー陰極線管
EP1001447B1 (fr) Tube couleur à rayons cathodiques
US6433467B1 (en) Shadow mask for cathode ray tube
EP1168411A1 (fr) Dispositif de sélection de couleurs pour un tube à rayons cathodiques et tube à rayons cathodiques
JP3882514B2 (ja) カラー陰極線管
JP2003109499A (ja) カラー陰極線管の製造方法
US20010009349A1 (en) Shadow mask assembly
KR100728202B1 (ko) 음극선관용 마스크 조립체
JP3334677B2 (ja) カラーブラウン管
KR950003846Y1 (ko) 마스크프레임 지지체
KR20020003616A (ko) 음극선관의 인장 마스크 지지용 프레임
JP2000090845A (ja) カラー陰極線管
JPH1196932A (ja) カラー受像管
JPH08171865A (ja) カラー受像管
JP2004193078A (ja) カラー陰極線管
JP2002110060A (ja) シャドウマスク構体及びカラー受像管
JPH11345573A (ja) カラー受像管
JPH11329272A (ja) カラー陰極線管
JP2003197118A (ja) シャドウマスク構体およびカラーブラウン管
JP2005197126A (ja) 陰極線管
JP2004200081A (ja) 陰極線管及びその色選別機構

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase