CN2139332Y - Demagnetizing coil - Google Patents
Demagnetizing coil Download PDFInfo
- Publication number
- CN2139332Y CN2139332Y CN 92238834 CN92238834U CN2139332Y CN 2139332 Y CN2139332 Y CN 2139332Y CN 92238834 CN92238834 CN 92238834 CN 92238834 U CN92238834 U CN 92238834U CN 2139332 Y CN2139332 Y CN 2139332Y
- Authority
- CN
- China
- Prior art keywords
- coil
- utility
- demagnetizing
- model
- demagnetizing coil
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
Disclosed is a novel demagnetizing coil. The utility model is characterized in that the demagnetizing coil is of an approximate square-frame shaped, and the line section 1, 2 and the line section 5, 6 of the demagnetizing coil are not on the same plane surface. The demagnetizing performance of the utility model is superior to the demagnetizing performance of the traditional demagnetizing coil, the cost price can be reduced greatly, and the utility model can be widely used on color televisions and various multicolor monitors.
Description
The utility model belongs to coil, and particularly color television set and colour picture monitor are for eliminating earth magnetism, the used anti-magnetized coil of stray magnetic field.
Usually as all there being degaussing circuit to comprise anti-magnetized coil and thermistor in colour TV and the colour picture monitor.When forming alternating magnetic field in the anti-magnetized coil at degaussing circuit after the energising.Because the thermistor of positive temperature coefficient is along with the resistance temperature rise of energising back, it is big that resistance value becomes, make and form the magnetic field of decay progressively in the degaussing circuit, thereby reach the planar mask around the elimination coil, the remanent magnetism and the stray magnetic field of parts of electronic gun, make the deflection of electron beam not be subjected to the influence of stray magnetic field, obviously improve image colour purity quality.Country variant, different manufacturers provide many different anti-magnetized coil versions at present.For example square frame shape, splayed, reinforced etc. are difficult to reach not only material saving, effect but also good unified optimization type anti-magnetized coil.
The purpose of this utility model provides a kind of demagnetization superior performance in traditional version and the low anti-magnetized coil of cost.
Demagnetization performance of the present utility model is better than traditional anti-magnetized coil greatly, and can reduce cost significantly, can be widely used on various color television sets and the colour picture monitor.
Fig. 1 is the structure chart of anti-magnetized coil.
The basic principle of the utility model design is: the key that affects the fluoroscopic colored picture tube of colour bar, color monitor tube colour purity performance is that shadow mask and electron gun are with spuious (or remaining) magnetic field perpendicular to the ground level direction. Horizontal direction or can not affect electron beam landing error (this is the root that causes colour purity bad) in the horizontal direction with the magnetic field of electron beam motion parallel direction, Therefore reasonably arrange anti-magnetized coil version and distribution, eliminate to greatest extent spuious (or remaining) magnetic field of this direction, just can reach high effect, purpose cheaply.
The utility model design adopts CAD to be optimized.
With the anti-magnetized coil example the utility model is done further narration below in conjunction with 54 centimetres of colored picture tubes:
Fig. 1 is a structure diagram of the present utility model.One of different characteristics of this design and common square frame shape anti-magnetized coil be line segment 1,2 and line segment 5,6 not at grade.1,2 liang of line segments form the degaussing field of vertical direction in the space around.In order to strengthen its effect, 1,2 liang of line segment plane and planar mask plane form an inclination angle (about 10 °～45 °).This inclination angle can make progress also (being that minor face is last or following) down, and effect is identical.3, the curved major at 4 places will be strengthened the degaussing field of four edges.The colour purity of four edges is responsive especially for leakage field elements such as line outputs on earth magnetism or the base plate, and this structure has been strengthened the erasure effect at four jiaos of places, edge greatly.
Since demagnetizing action with by electric current in the anti-magnetized coil direct relation is arranged, therefore in order to reach best fit with thermistor, suitable selection can be done in the number of turns of coil and line meter footpath, so that reach the requirement that colour display screen pipe, monitor tube offset the abampere number of turn.
Can do necessary adjustment for different type of machines, different fixing mode according to design of the present utility model.
Claims (2)
1, a kind of novel anti-magnetized coil is characterized by in approximate square frame shape anti-magnetized coil, and line segment 1,2 and line segment 5,6 are not at grade.
2, coil according to claim 1 is characterized by the plane of line segment 1,2 and the shadow mask board plane forms 10 °～45 ° inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238834 CN2139332Y (en) | 1992-10-30 | 1992-10-30 | Demagnetizing coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238834 CN2139332Y (en) | 1992-10-30 | 1992-10-30 | Demagnetizing coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2139332Y true CN2139332Y (en) | 1993-07-28 |
Family
ID=33779728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92238834 Expired - Fee Related CN2139332Y (en) | 1992-10-30 | 1992-10-30 | Demagnetizing coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2139332Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917630A (en) * | 2010-07-23 | 2010-12-15 | 广东朝野科技有限公司 | Calculation method of parameters of demagnetizing coil of color television set |
| CN104465018A (en) * | 2013-09-24 | 2015-03-25 | 宝山钢铁股份有限公司 | Portable passive demagnetization device |
-
1992
- 1992-10-30 CN CN 92238834 patent/CN2139332Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917630A (en) * | 2010-07-23 | 2010-12-15 | 广东朝野科技有限公司 | Calculation method of parameters of demagnetizing coil of color television set |
| CN104465018A (en) * | 2013-09-24 | 2015-03-25 | 宝山钢铁股份有限公司 | Portable passive demagnetization device |
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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 |