CN1753145B - Large screen glass cone for colour cathode ray tube - Google Patents
Large screen glass cone for colour cathode ray tube Download PDFInfo
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- CN1753145B CN1753145B CN 200510115698 CN200510115698A CN1753145B CN 1753145 B CN1753145 B CN 1753145B CN 200510115698 CN200510115698 CN 200510115698 CN 200510115698 A CN200510115698 A CN 200510115698A CN 1753145 B CN1753145 B CN 1753145B
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Abstract
The invention discloses a wide-screen glass cone for color cathode ray tube (CRT), comprising a cone and a tube neck, characterized in that the cone and tube neck are interconnected through rectangular deflecting coil, where the inner and outer sides of cross section of the rectangular deflecting coil meet the relational expressions (L+S)/D>=1.4 and (1.6=<L/S<=2), in which, L, S and D stand for long-axis length, short-axis length and diagonal length of inner or outer surface of cross section of the rectangular deflecting coil, respectively. The invention also discloses a CRT and glass cone producing mould.
Description
Technical field
The present invention relates to a kind of cathode ray tube technologies, relate to the mould of a kind of cathode ray tube and large screen glass cone thereof, production glass awl specifically.
Background technology
With reference to shown in Figure 1, existing color cathode ray tube comprises the glass awl 2 that glass screen 1 and glass screen 1 are packaged together, and the cathode ray tube interior of whole sealing is pumped into vacuum state.The inner surface of glass screen 1 scribbles RGB color fluorescent material.Glass awl 2 comprises cone 8, deflecting coil part 3 and neck 7, and cone 8 is connected by deflecting coil part 3 with neck 7.Bore 2 inside at glass and be provided with shadow mask, framework, inner shield plate, neck 7 is provided with electron gun, in the outer setting of deflecting coil part 3 deflecting coil is arranged, and said structure adds that glass screen 1 and glass awl 2 form color cathode ray tubes.
Be used for shadow mask that color selects and be installed in the inboard of glass screen 1 by framework, at the framework rear side inner shield plate is installed, this plate is used to shield the magnetic force such as the magnetic field of the earth, makes the electron beam 6 of electron gun 5 not be subjected to the influence such as the magnetic field of the earth.In color cathode ray tube, because the static magnetic field that the electron beam 6 that penetrates from electron gun 5 is deflected coil 4 in level and vertical direction deflection, is mapped on the inner surface that scribbles fluorescent material of glass screen 1, make fluorescent material luminous, thereby produce image.The cross section of the deflecting coil part 3 of glass awl 2 is generally cirque structure, and in order to make the screen that can cover the rectangle of full glass screen 1 from the electron beam of electron gun 5 ejaculations, deflecting coil must have very big deflection power.Owing to the screen 1 of electron beam 6 that penetrates from electron gun 5, must cause portions of electronics bundle 6 to go out again, cause leakage magnetic field, thereby cause certain pollution from the rectangular screen ovfl in order to cover rectangle.
China Patent No. is that 01138417.4 patent documentation discloses a kind of color cathode ray tube, it has the main part that is connected on the display screen, the neck of electron gun is installed in it, and form between main part and neck the yoke portion that connects and deflecting coil is installed in it, wherein, the outer surface of yoke portion satisfies relational expression 0.6＜Δ HV/L＜0.71, wherein L represents the catercorner length of yoke portion outer surface, H represents the long axis length of yoke portion outer surface, V represents the minor axis length of yoke portion outer surface, Δ H represents that catercorner length L and long axis length H's is poor, Δ V represents the poor of catercorner length L and minor axis length V, and Δ HV represents Δ H and Δ V sum.Glass awl according to the color cathode ray tube of this invention is configured, and makes that the scope of design of yoke portion is optimised when the screen ratio is about 16: 9, thereby, satisfy high brightness and high-frequency, the minimizing deflection power, and reduce stray field.Though reduced the deflection power of deflecting coil to a certain extent and reduced leakage magnetic field though satisfy the glass awl of this condition, satisfy mathematical Pythagorean theorem but major axis H, the minor axis V of the rectangular cross section of the deflecting coil part (yoke portion) of satisfied 0.6＜Δ HV/L＜0.71 condition and diagonal axis L are approximate, certainly will cause the length of diagonal axis long like this.Because screen is one four jiaos the approximate rectangular of rounding arranged, diagonal axis length is less than the catercorner length of rectangle, the electron beam that penetrates from electron gun has leakage on the diagonal axis direction of screen after the deflecting coil part deflection of 0.6＜Δ HV/L＜0.71 that satisfies condition.
Summary of the invention
Technical problem solved by the invention provides a kind of cathode-ray tube large screen glass cone, and reveal in the magnetic field that has solved the wide screen display screen effectively.
Technical scheme of the present invention is as follows:
Large screen glass cone for colour cathode ray tube, comprise cone and neck, cone is connected by square yoke portion with neck, inner edge and exopodal relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2 of the cross section of described square yoke portion, wherein L represents the long axis length of square yoke portion cross section inner surface or outer surface, S represents the minor axis length of square yoke portion cross section inner surface portion or outer surface, and D represents the catercorner length of square yoke portion cross section inner surface or outer surface.
The length of the rectangular aperture of described glass awl and wide ratio are between 1.6～2.The span of D wherein
Another one technical problem solved by the invention provides a kind of cathode ray tube.
Technical scheme of the present invention is as follows:
A kind of cathode ray tube, comprise cone and neck, cone is connected by square yoke portion with neck, described neck is provided with electron gun, relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2 are satisfied in the inner edge and the outside of the cross section of described square yoke portion, wherein L represents the long axis length of square yoke portion cross section inner surface or outer surface, S represents the minor axis length of square yoke portion cross section inner surface portion or outer surface, D represents the catercorner length of square yoke portion cross section inner surface or outer surface, and described deflecting coil part is provided with deflecting coil.
The length of the rectangular aperture of glass awl and wide ratio are between 1.6～2.The span of D wherein
Another one technical problem solved by the invention provides a kind of mould of producing the glass awl.
Technical scheme of the present invention is as follows:
A kind of mould of producing the glass awl comprises the mould circle, also comprises punch and die, and described punch is provided with the punch rectangular portion, and described die is provided with the die rectangular portion, and punch rectangular portion and die rectangular portion are used, and described mould circle, punch and die flexibly connect.
The cross section of described punch rectangular portion and die rectangular portion satisfies relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2 and 1.6≤L/S≤2, wherein L represents the long edge lengths of punch rectangular portion or die rectangular portion cross section, S represents the bond length of punch rectangular portion or die rectangular portion cross section, D represents the catercorner length of punch rectangular portion or die rectangular portion cross section, and wherein D1 satisfies
Be mapped to display screen comparison on the same screen with of the prior art after the electron beam process circular deflection yoke portion deflection that electron gun is launched, the glass awl ground that is provided with square yoke of the present invention has reduced the leakage in magnetic field.
The cross-sectional area of the square yoke of the present invention in addition portion area of comparing with the cross section of common circular deflection yoke portion glass awl is much smaller, and has so just reduced the deflection power of deflecting coil.Be that the glass awl described in 01138417.4 the patent of invention is compared with China Patent No., the diagonal axis length of square yoke portion is less than the catercorner length that this patent No. is the deflecting coil part described in 01138417.4 the patent of invention as described in the present invention, so the cross-sectional area of square yoke of the present invention portion is less than the cross-sectional area that this patent No. is the deflecting coil part described in 01138417.4 the patent of invention, thereby further reduced the deflection power of deflecting coil.
The surfaces externally and internally of the square yoke portion described in the present invention satisfies relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2, has limited the value of diagonal axis length, makes diagonal axis length satisfy
The diagonal axis length of square yoke of the present invention like this portion is less than the catercorner length that the patent No. is the deflecting coil part described in 01138417.4 the patent of invention, after the electron beam process square yoke of the present invention portion deflection that electron gun is launched, be mapped to the front side four jiaos is on the approximate rectangular display screen of fillet, just in time to have reduced the leakage magnetic field on the diagonal axis direction to greatest extent.
Description of drawings
Fig. 1 is the part sectioned view of chromoscope in the prior art;
Fig. 2 is the stereogram of cathode-ray tube large screen glass cone of the present invention;
Fig. 3 is the structure cutaway view of square yoke portion among the present invention;
Fig. 4 is the cross-sectional view that marks square yoke cross section outside data;
Fig. 5 is the cross-sectional view that marks square yoke cross section inner edge data;
The test data contrast tabulation that the preferred embodiment of Fig. 6 cathode-ray tube large screen glass cone of the present invention and existing glass awl are done.
Fig. 7 produces the die profile of cathode-ray tube large screen glass cone.
Embodiment
Cathode-ray tube large screen glass cone of the present invention, be under 1.6～2 the situation in the length-width ratio (ratio of long axis length and minor axis length) of screen, structure by further optimal design deflecting coil part, make the cathode-ray tube large screen glass cone can reduce the deflection power of deflecting coil, and reduced magnetic line of force leakage to greatest extent, particularly reduce the leakage magnetic field on the diagonal axis direction, satisfied high brightness and high-frequency requirement simultaneously.
Be further described below in conjunction with the preferred embodiment of accompanying drawing cathode-ray tube large screen glass cone of the present invention.
To shown in Figure 5, cathode-ray tube large screen glass cone 20 of the present invention comprises neck 7, cone 8 and square yoke portion 21 with reference to Fig. 2.Wherein, relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2 are satisfied in the inner edge of the cross section of square yoke portion 21 and outside, wherein L represents the long axis length of square yoke portion cross section inner surface or outer surface, S represents the minor axis length of square yoke portion cross section inner surface portion or outer surface, and D represents the catercorner length of square yoke portion cross section inner surface or outer surface.The length of the rectangular aperture of cathode-ray tube large screen glass cone 20 and wide ratio are between 1.6～2.
, wherein D represents the catercorner length of square yoke portion cross section inner surface or outer surface.
According to large screen glass cone for colour cathode ray tube 20 of the present invention, when rectangular aperture length-width ratio (ratio of long axis length and minor axis length) satisfies 1.6～2, the length-width ratio (ratio of long axis length and minor axis length) of the rectangular aperture of length-width ratio of the interior outside of the cross section of square yoke portion 21 ratio of minor axis length (long axis length with) and cathode-ray tube large screen glass cone 20 has identical span 1.6～2, and the surfaces externally and internally of square yoke portion 21 cross sections also satisfies relational expression (L+S)/D 〉=1.4, makes
Thereby make the design of square yoke portion 21 obtain reasonably optimizing, reduced the deflection power of the deflecting coil that is provided with in the square yoke portion 21, and reduced magnetic line of force leakage to greatest extent, particularly reduce the leakage magnetic field on the cathode ray tube diagonal axis direction, satisfied display screen high brightness and high-frequency requirement simultaneously.
When the opening length-width ratio (ratio of long axis length and minor axis length) of cone 8 satisfies 1.6～2, the length-width ratio (ratio of long axis length and minor axis length) of the rectangular aperture of length-width ratio of the inside and outside portion of cross section of square yoke portion 21 ratio of minor axis length (long axis length with) and cone 8 has identical span 1.6～2, and the surfaces externally and internally of deflecting coil part also satisfies relational expression (L+S)/D 〉=1.4, makes
Thereby, make after be arranged on electron beam that neck 7 electron guns launch deflecting coil through square yoke of the present invention portion 21, be mapped to length-width ratio (ratio of long axis length and minor axis length) after the deflection also on satisfied 1.6～2 the screen.Compare with being mapped to same screen after deflecting coil 4 deflections of the electron beam of launching from electron gun 56 of the prior art through circular deflection yoke portions 3, large screen glass cone of the present invention has reduced the leakage in magnetic field widely.Because be mapped on the screen that is roughly rectangle of front after the electron beam of launching from electron gun 56 of the prior art passes through 3 deflections of circular deflection yoke portions, certainly will cause the outside of portions of electronics beam, thereby cause the part leakage magnetic field to rectangular screen.
In addition, the glass awl 2 and the glass awl 2 that is provided with square yoke portion 21 of the present invention of deflecting coil part 3 with circle of same screen size compared, the cross-sectional area of square yoke of the present invention portion 21 is much smaller than the cross-sectional area of circular deflecting coil part 3, has so just reduced the deflection power of square yoke 21.
Compare with the awl of the glass described in the patent of invention of number of patent application 01138417.4, the catercorner length of square yoke of the present invention portion 21 is less than the catercorner length that this patent No. is the deflecting coil part described in 01138417.4 the patent of invention, so the cross-sectional area of square yoke of the present invention portion 21 is less than the cross-sectional area that the patent No. is the deflecting coil part described in 01138417.4 the patent of invention, thereby proves that further the present invention has reduced the deflection power of deflecting coil.
Because it is the approximate rectangular of fillet that the screen of color cathode ray tube is four jiaos, if the electron beam that will launch from electron gun is to be mapped to after the deflecting coil part deflection described in 01138417.4 the patent of invention on the approximate rectangular display screen that four jiaos of front side are fillet by the patent No., certainly will on diagonal, cause leakage magnetic field.Four jiaos of the electron beam after the deflection can be mapped to the front side of square yoke of the present invention portion 21 are on the approximate rectangular display screen of fillet, reduced the leakage magnetic field on the diagonal to greatest extent, because the surfaces externally and internally of the square yoke portion 21 among the present invention satisfies relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2, limit the value of catercorner length, made catercorner length satisfy
, the catercorner length of square yoke of the present invention like this portion 21 is less than the catercorner length that the patent No. is the deflecting coil part described in 01138417.4 the patent of invention.
Below with reference to Fig. 6 the present invention is further described.
Preferred embodiment and existing glass awl 2, the patent No. of having listed cathode-ray tube large screen glass cone 20 of the present invention among Fig. 6 are the test data that the glass awl described in 01138417.4 is done, wherein comparative example 1 is represented the test data of prior art, the comparative example 2 expression patent No.s are 01138417.4 test data, and embodiment represents the test data of cathode-ray tube large screen glass cone 20 of the present invention.By Fig. 6 contrast test data as can be seen, the cross-sectional area of square yoke of the present invention portion 21 is less than the cross-sectional area of the deflecting coil part of the glass awl in existing two kinds of technology, so the square yoke 21 that is provided with on the cathode-ray tube large screen glass cone 20 of the present invention has reduced the deflection power of existing deflecting coil and has further reduced the leakage in magnetic field, has particularly reduced the leakage magnetic field on the display screen diagonal direction.
Cathode ray tube comprises cone 8 and neck 7, cone 8 is connected by square yoke portion 21 with neck 7, neck 7 is provided with electron gun 5, relational expression (L+S)/D 〉=1.4 and 1.6≤L/S≤2 are satisfied in the inner edge of the cross section of square yoke portion 21 and outside, wherein L represents the long axis length of square yoke portion cross section inner surface or outer surface, S represents the minor axis length of square yoke portion cross section inner surface portion or outer surface, D represents the catercorner length of square yoke portion cross section inner surface or outer surface, and square yoke portion is provided with deflecting coil.The length of the rectangular aperture of glass awl 2 and wide ratio between 1.6～2,
, wherein D represents the catercorner length of deflecting coil part cross section inner surface or outer surface.
Below with reference to Fig. 7 the preferred embodiment of the mould of production glass awl 2 is described in detail.
The mould of producing the glass awl comprises mould circle 33, punch 31 and die 32, and punch 31 is provided with the punch rectangular portion, and die 32 is provided with the die rectangular portion, and punch rectangular portion and die rectangular portion are used, and mould circle 33, punch 31 and die 32 flexibly connect.The cross section of punch rectangular portion and die rectangular portion satisfies relational expression (L+S)/D1 〉=1.4 and 1.6≤L/S≤2 and 1.6≤L/S≤2, wherein L represents the long edge lengths of the cross section of punch rectangular portion or die rectangular portion, S represents the bond length of the cross section of punch rectangular portion or die rectangular portion, D1 represents the catercorner length of the cross section of punch rectangular portion or die rectangular portion, and wherein D1 satisfies
Cathode-ray tube large screen glass cone 20 is to be formed by the mould compacting of producing the glass awl.With reference to Fig. 7, die set is made up of punch 31, die 32 and mould circle 33 3 parts, punch 31 is used for the negative camber of moulding cathode-ray tube large screen glass cone 20, die 32 is used for the positive camber of moulding cathode-ray tube large screen glass cone 20, and mould circle 33 is used to seal the die cavity that is made of punch 31 and die 32.
The molding mode of cathode-ray tube large screen glass cone 20 is as follows:
The glass of the fusion form with gob is splashed in the opening cavity that is made of die 32, mould circle 33, and punch 31 descends with certain speed then, the glass gob in the Extruding die 32.Along with punch 31 constantly descends, glass gob constantly flows to the direction of mould circle 33 from punch 31 and die 32 surfaces, and after to a certain degree, punch 31 stops to descend, at this moment, and the full die cavity that forms by punch 31, die 32 and mould circle 33 of glass gob complete filling.Carry out pressurize subsequently, during pressurize, the cooling duct of the cooling system of punch 31 inside, die 32 outsides and low ambient temperature target used in cathode-ray tube large screen glass cone 20 together cool off, up to the glass solidification of fusion.The effective large screen glass cone of so complete extreme ray 20 finishes with regard to moulding.In addition, because the effective large screen glass cone 20 of extreme ray is in forming process, very big distortion has taken place and has crossed over huge temperature difference in the melten glass that constitutes the effective large screen glass cone 20 of extreme ray, can there be bigger thermal stress and distortional stress in the glass awl, so after moulding is finished, still need the glass awl is carried out the stress relief annealing operation.
Claims (5)
1. large screen glass cone for colour cathode ray tube, comprise cone and neck, it is characterized in that cone is connected by square yoke portion with neck, relational expression (L+S)/D 〉=1.4,1.6≤L/S≤2 and are satisfied in the inner edge and the outside of the cross section of described square yoke portion
Wherein, L represents the long axis length of the cross section inner surface of square yoke portion, and S represents the minor axis length of the cross section inner surface of square yoke portion, and D represents the catercorner length of the cross section inner surface of square yoke portion;
Perhaps, L represents the long axis length of the cross section outer surface of square yoke portion, and S represents the minor axis length of the cross section outer surface of square yoke portion, and D represents the catercorner length of the cross section outer surface of square yoke portion.
2. large screen glass cone for colour cathode ray tube according to claim 1 is characterized in that, the opening of described cathode-ray tube large screen glass cone is a rectangle, and the length of described opening and wide ratio are between 1.6～2.
3. cathode ray tube, comprise cone and neck, described neck is provided with electron gun, it is characterized in that, cone is connected by square yoke portion with neck, and relational expression (L+S)/D 〉=1.4,1.6≤L/S≤2 and are satisfied in the inner edge and the outside of the cross section of described square yoke portion
Wherein, L represents the long axis length of the cross section inner surface of square yoke portion, and S represents the minor axis length of the cross section inner surface of square yoke portion, and D represents the catercorner length of the cross section inner surface of square yoke portion;
Perhaps, L represents the long axis length of the cross section outer surface of square yoke portion, and S represents the minor axis length of the cross section outer surface of square yoke portion, and D represents the catercorner length of the cross section outer surface of square yoke portion;
Described square yoke portion is provided with deflecting coil.
4. cathode ray tube according to claim 3 is characterized in that, the length of the rectangular aperture of cone and wide ratio are between 1.6～2.
5. a mould of producing the glass awl comprises the mould circle, it is characterized in that; also comprise punch and die, described punch is provided with the punch rectangular portion, and described die is provided with the die rectangular portion; punch rectangular portion and die rectangular portion are used, and described mould circle, punch and die flexibly connect
The cross section of described punch rectangular portion and die rectangular portion satisfies relational expression (L+S)/D1 〉=1.4 and 1.6≤L/S≤2,1.6≤L/S≤2 and
Wherein L represents the long edge lengths of the cross section of punch rectangular portion, and S represents the bond length of the cross section of punch rectangular portion, and D1 represents the catercorner length of the cross section of punch rectangular portion;
Perhaps, L represents the long edge lengths of the cross section of die rectangular portion, and S represents the bond length of the cross section of die rectangular portion, and D1 represents the catercorner length of the cross section of die rectangular portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510115698 CN1753145B (en) | 2005-11-09 | 2005-11-09 | Large screen glass cone for colour cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510115698 CN1753145B (en) | 2005-11-09 | 2005-11-09 | Large screen glass cone for colour cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753145A CN1753145A (en) | 2006-03-29 |
| CN1753145B true CN1753145B (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510115698 Expired - Fee Related CN1753145B (en) | 2005-11-09 | 2005-11-09 | Large screen glass cone for colour cathode ray tube |
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| Country | Link |
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| CN (1) | CN1753145B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744135A (en) * | 2016-04-12 | 2016-07-06 | 武汉理工大学 | Dovetail Groove Type Split-Type 135 Full-Screen Digital SLR Camera |
| CN105744136A (en) * | 2016-04-12 | 2016-07-06 | 武汉理工大学 | Dovetail groove type split 135 full frame EVIL (electronic viewfinder, interchangeable lens) camera |
| CN105744134A (en) * | 2016-04-12 | 2016-07-06 | 武汉理工大学 | Arc Guidepost Type Split-Type 135 Full-Screen Single Electric Camera |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369896A (en) * | 2001-02-13 | 2002-09-18 | Lg电子株式会社 | Glass cone for color CRT |
| CN1409347A (en) * | 2001-09-28 | 2003-04-09 | 日本电气硝子株式会社 | Ventilation tube for cathode ray tube and forming mold for producing said ventilation tube |
-
2005
- 2005-11-09 CN CN 200510115698 patent/CN1753145B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369896A (en) * | 2001-02-13 | 2002-09-18 | Lg电子株式会社 | Glass cone for color CRT |
| CN1409347A (en) * | 2001-09-28 | 2003-04-09 | 日本电气硝子株式会社 | Ventilation tube for cathode ray tube and forming mold for producing said ventilation tube |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-323070A 2000.11.24 |
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| Publication number | Publication date |
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| CN1753145A (en) | 2006-03-29 |
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