CN2405311Y - Shadow mask for color cathode-ray tube - Google Patents
Shadow mask for color cathode-ray tube Download PDFInfo
- Publication number
- CN2405311Y CN2405311Y CN 99252031 CN99252031U CN2405311Y CN 2405311 Y CN2405311 Y CN 2405311Y CN 99252031 CN99252031 CN 99252031 CN 99252031 U CN99252031 U CN 99252031U CN 2405311 Y CN2405311 Y CN 2405311Y
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- shadow mask
- ray tube
- color cathode
- microns
- utility
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Abstract
The utility model relates to a shadow mask for color cathode-ray tube. The shadow mask for color cathode-ray tube is a planar shadow mask; a bridge magnitude (B) on four corners is in the range of 190 microns +/-15 microns. The shadow mask is a multi-media color cathode-ray tube planar shadow mask of which a vertical pitch adopts a variable pitch manner. The utility model adopts nickel tile alloy (iron nickel alloy containing nickel for 36 percents) with small heat deformation as material.
Description
The utility model relates to shadow mask for color cathode-ray tube, particularly relates to the electron beam transmitance that can improve four angle parts, can keep the multi-media color cathode ray tube planar mask of enough mechanical strength again.
The 84cm of Shanghai Yongxin Colour Kinescope Co., Ltd (promptly 34 inches) color cathode ray tube production line has adopted the 331-V12 type planar mask of Mitsubishi in pilot process.The crane span structure value (B) of four angle parts of this shadow mask is got 195 microns ± 20 microns numerical value.
Use is the result show, the shadow mask of this trade mark is not exclusively suitable to the 84cm color cathode ray tube production line of chromoscope Co., Ltd of Yongxin, the color cathode ray tube of producing, the image brightness of its four angle part is 45～50% with the ratio (hereinafter to be referred as " brightness ratio ") of the brightness of core, and this brightness ratio of specification requirement should be greater than 40%, and process margin is less.That is to say, may occur being lower than the shadow mask product of specification requirement in process of production.
In view of described problem above existing, the image brightness that the purpose of this utility model is to provide a kind of four angle parts and the brightness ratio of core are 40% more much higher than specification requirement, process margin is bigger, and has the colorful cathode ray tube planar mask of enough mechanical strengths.
In order to improve the transmitance of four angle parts, the utility model has taked to reduce the crane span structure value of shadow mask four angle parts, keeps the constant method of crane span structure value B of core.The crane span structure value B of shadow mask four angle parts gets 190 microns ± 15 microns numerical value.
Again, it is desirable to more, the crane span structure value B of shadow mask four angle parts gets the numerical value about 185～190 microns.
Again, shadow mask for color cathode-ray tube of the present utility model adopts invar alloy (nickeliferous 36% iron-nickel alloy) as material.
Adopt 84cm shadow mask for color cathode-ray tube of the present utility model, improved the electron beam transmitance of shadow mask, use the overall brightness of the color cathode ray tube of shadow mask of the present utility model to be improved, especially four jiaos brightness reaches 55%～60% with the ratio of center brightness, has improved 10%.Adopt the utility model, though reduced the crane span structure value, but keep shadow mask that enough mechanical strengths are arranged, satisfied the quality requirement of 84cm color cathode ray tube.
Fig. 1 is the enlarged drawing of the slotted eye of shadow mask for color cathode-ray tube and shadow mask four angle parts.
Fig. 2 is the structure chart of shadow mask for color cathode-ray tube.
Fig. 3 is the schematic illustration of four angle part crane span structure values of shadow mask for color cathode-ray tube of the present utility model.
With reference to the accompanying drawings the utility model is illustrated.
As depicted in figs. 1 and 2, planar mask has hundreds thousand of slotted eyes, and slotted eye is big more, and transmitance is just big more.Decision transmitance size two sizes are arranged, i.e. aperture D and crane span structure value B, pitch PH and PV are determined by the user, are certain value.The margin of tolerance of aperture D is very little, is not easy control.The tolerance of crane span structure value B generally about ± 20 microns, can supply the scope of adjustment bigger.But the size of crane span structure value is directly connected to the intensity of shadow mask.Therefore can not too reduce.
In view of the ratio of the image brightness of four angle parts of the 331-V12 type planar mask of Mitsubishi and the brightness of core is 45～50%, and this brightness ratio of specification requirement should be greater than 40%, and process margin is less.As shown in Figure 3, the crane span structure value B that the utility model reduces shadow mask four angle parts gets 190 microns ± 15 microns numerical value.And keep the crane span structure value of core constant.It is desirable to more, the crane span structure value B of shadow mask four angle parts gets the numerical value about 185～190 microns.
Again, (contain the iron-nickel alloy of 36%Ni, thermal coefficient of expansion is less than 1.5 * 10 for shadow mask for color cathode-ray tube employing invar alloy of the present utility model
-6/ ℃) plate makes, and can reduce the thermal deformation of shadow mask effectively.
Adopt 84cm shadow mask for color cathode-ray tube of the present utility model, improved the electron beam transmitance of shadow mask, use the overall brightness of the color cathode ray tube of shadow mask of the present utility model to be improved, four jiaos brightness has improved 10% with the ratio of center brightness, has widened the process margin as the user's of shadow mask picture tube factory.Though reduced the crane span structure value, but kept shadow mask that enough mechanical strengths are arranged.Can adapt to the instructions for use of 84cm color cathode ray tube.
Claims (3)
1. shadow mask for color cathode-ray tube, described shadow mask are normal pitch take to switch political loyalty multi-media color cathode ray tube planar masks apart from mode, it is characterized in that,
The crane span structure value of four angle parts of described shadow mask for color cathode-ray tube is got 190 microns ± 15 microns numerical value.
2. shadow mask for color cathode-ray tube according to claim 1 is characterized in that,
The crane span structure value of four angle parts of described shadow mask for color cathode-ray tube is got the numerical value about 185～190 microns.
3. shadow mask for color cathode-ray tube according to claim 1 and 2 is characterized in that, described shadow mask for color cathode-ray tube adopts the invar alloy, be that nickeliferous 36% iron-nickel alloy is a material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99252031 CN2405311Y (en) | 1999-12-09 | 1999-12-09 | Shadow mask for color cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99252031 CN2405311Y (en) | 1999-12-09 | 1999-12-09 | Shadow mask for color cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2405311Y true CN2405311Y (en) | 2000-11-08 |
Family
ID=34036343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99252031 Expired - Fee Related CN2405311Y (en) | 1999-12-09 | 1999-12-09 | Shadow mask for color cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2405311Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418179C (en) * | 2004-03-12 | 2008-09-10 | Lg.飞利浦显示器（韩国）株式会社 | Colour cathode-ray tube |
-
1999
- 1999-12-09 CN CN 99252031 patent/CN2405311Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418179C (en) * | 2004-03-12 | 2008-09-10 | Lg.飞利浦显示器（韩国）株式会社 | Colour cathode-ray tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |