CN1306296A - Electronic beam deflector for CRT and kinescope - Google Patents
Electronic beam deflector for CRT and kinescope Download PDFInfo
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- CN1306296A CN1306296A CN 01105474 CN01105474A CN1306296A CN 1306296 A CN1306296 A CN 1306296A CN 01105474 CN01105474 CN 01105474 CN 01105474 A CN01105474 A CN 01105474A CN 1306296 A CN1306296 A CN 1306296A
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Abstract
An electron beam deflecation device for the cathode ray display tube and picture tube has two and above magnetic cores in different shapes which are arranged with vertical scanning coil and parallel scanning coil. The design of each magnetic core and each coil should be reasonable for the magnetic field distributed at certain area to let the electron beam deflecate in sufficient angle when the beam is passing the area and actting with the magnetic field.
Description
The present invention relates to a kind of electron beam deflection device, relate in particular to a kind of electron beam deflection device that is used for cathode-ray display tube and picture tube, belong to basic technical field of electric appliances.
The at present used cathode-ray display tube and the electron beam deflection device of picture tube, all be on a magnetic core with definite shape, twine the conductive coil of the definite shape and the number of turns as requested, when feeding electric current in the coil, in certain zone, just can obtain the magnetic field of corresponding distribution and intensity, when electron beam passes through this zone in cathode-ray display tube and picture tube, be subjected to the effect in magnetic field, produce certain deflection, get on the phosphor screen then.When supplying with the electric current of the certain waveform of coil, electron beam just can scan out grating on phosphor screen." color picture tube " first volume of writing as the long-standing grade of virgin woods (National Defense Industry Press, 1996, P309-P312) described in, the motion of electron beam on screen controlled by deflecting coil fully, therefore must consider the Distribution of Magnetic Field shape of deflecting coil etc.The actual distribution of deflecting coil is quite complicated, it not only distributes along tube axial direction, also distribute along yawing moment, and the latter is also different along the diverse location DISTRIBUTION OF MAGNETIC FIELD shape of tubular axis, the maximum of its horizontal deflection coil magnetic flux density is an asymmetric bell-shaped profile about from the less end of internal diameter 1/3 overall length place.Because electron beam needs certain space and the action of a magnetic field and the enough angles of deflection, and magnetic core has only one, the shape of magnetic core and the number of turns and the shape of coil are restricted, thereby are running into difficulty aspect volume that reduces arrangement for deflecting and the raising arrangement for deflecting efficient.
The objective of the invention is at the deficiencies in the prior art, a kind of electron beam deflection device of new structure is provided, electron beam is being reached under the situation of same raster, volume reduces and the deflection efficiency raising, when the current potential in the electron beam deflecting zone when higher, just can the enough big angle of deflection in less zone, the volume of large scale display pipe and picture tube can reduce greatly like this.
From researching and analysing as can be known, the maximum that causes magnetic flux density in the present deflecting coil is about from the less end of internal diameter 1/3 overall length place, and the main cause that the further increase of electron beam deflecting angle is restricted is: because electron beam is wanted the enough big angle of deflection, so the internal diameter of magnetic core is little in the porch, big in the exit, form horn-likely, if the loudspeaker opening can make magnetic field strengthen with outdiffusion to the exit too big; By existing coil canoe decision, identical with the exit coil turn in the porch.By these 2 decisions, the magnetic flux density maximum just is partial to the less side of internal diameter on the tubular axis, and promptly electron beam enters the arrangement for deflecting porch.
Design of the present invention is exactly to manage to improve this situation, and the magnetic core internal diameter in exit is increased, and also will make magnetic flux density maximum on the tubular axis as far as possible in 1/2 place of overall length, the i.e. centre in porch and exit.The present invention is in technical scheme, used plural magnetic core, and on each magnetic core winding around respectively, like this can be different at the coil turn in porch and exit, by the coil turn in appropriate design porch and exit, the position of magnetic flux density maximum on axle on the scalable tubular axis.Because of porch and exit are not same magnetic cores, so that the internal diameter of exit magnetic core can design is bigger, to satisfy big deflection angle.
The present invention is in technical scheme, the electron beam deflection device of design comprises a plurality of magnetic cores that vary in size, on each magnetic core, be wound with the shape conductive coil different with the number of turns, each magnetic core that is wound with coil is fixed on the isolator by certain relative position, is installed on display tube and the picture tube being convenient to.Coil on each magnetic core can feed the electric current of different scanning waveform, also the polyphone of the coil on each magnetic core can be used same capable frame scan current source.
Need only each magnetic core and coil are reasonably designed, make the magnetic field in certain zone reach rational a distribution, when electron beam is regional by this, with regard to energy and the action of a magnetic field, the angle that deflection is enough.
The present invention adopts the design of a plurality of magnetic cores and coil windings, makes the flexibility that designs for Distribution of Magnetic Field increase greatly, thereby has improved the efficient of arrangement for deflecting, and makes the whole volume of display tube and picture tube further to dwindle.
For understanding the technical scheme of patent of the present invention better, be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
As shown in the figure, plural magnetic core 1 is arranged in the arrangement for deflecting, vertical scanning coil 2 and horizontal sweep coil 3 are arranged on each magnetic core.In structure as shown in the figure, be that the ring-shaped magnetic core 1 of rectangle is a skeleton with each cross section at first respectively, vertical scanning coil 2 on twining earlier separately on them, then that other coiling is good horizontal sweep coil 3 are close to and are bonded in ring-shaped magnetic core 1 inboard that is wound with vertical scanning coil 2.The magnetic core 1 that respectively is wound with coil can be installed on display tube and the picture tube subsequently.
Fig. 2 adopts the structural representation of toroidal core embodiment for the present invention.
As shown in the figure, present embodiment has adopted two cross sections to be circular toroidal core 1 in arrangement for deflecting, Be respectively big magnetic core and little magnetic core, vertical scanning coil 2 and horizontal sweep coil 3 arranged on two magnetic cores, Wire circle on the big magnetic core is more, and the wire circle on the little magnetic core is less.
In this embodiment, the cross section of two magnetic cores is circle, because big magnetic core has the more space winding around than little magnetic core, therefore on big magnetic core, twine more coil, rationally adjust coil number separately on big magnetic core and the little magnetic core, the interior magnetic field intensity in zone of big magnetic core correspondence is not reduced because big magnetic core internal diameter is big, and when winding around, effectively utilized big magnetic core as the winding space that skeleton provided.
In the present embodiment, big magnetic core cross section circular diameter is 1cm, little magnetic core cross section circular diameter also is 1cm, the big magnetic core internal diameter of annular is 6cm, and annular little magnetic core internal diameter is 2.6cm, and the median plane of two ring-shaped magnetic cores is at a distance of 1.5cm, the vertical scanning coil number of turns of twining on little magnetic core is 2 * 120, the horizontal sweep coil number of turns is 2 * 35, and the vertical scanning coil number of turns of twining on big magnetic core is 2 * 250, and the horizontal sweep coil number of turns is 2 * 80.
Owing to be wound with the more coil of the number of turns on the big magnetic core, compensated the increase of magnetic core internal diameter, make that the magnetic flux density maximum is in the middle of the porch and exit of deflection area basically to the bigger side shifting of internal diameter on the tubular axis; And, thereby make the deflection angle of electron beam further to strengthen because the internal diameter of exit magnetic core and the ratio of deflection area axial length increase greatly.
Claims (1)
1, a kind of electron beam deflection device that is used for cathode-ray display tube and picture tube, it is characterized in that including plural ring-shaped magnetic core (1), and be that skeleton is wound with vertical scan line circle (2) with each magnetic core (1), horizontal sweep coil (3) is close to magnetic core (1) inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01105474 CN1306296A (en) | 2001-02-28 | 2001-02-28 | Electronic beam deflector for CRT and kinescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01105474 CN1306296A (en) | 2001-02-28 | 2001-02-28 | Electronic beam deflector for CRT and kinescope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1306296A true CN1306296A (en) | 2001-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01105474 Pending CN1306296A (en) | 2001-02-28 | 2001-02-28 | Electronic beam deflector for CRT and kinescope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1306296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735198A (en) * | 2016-11-23 | 2017-05-31 | 北京航空航天大学 | A kind of electron beam High-precision high-frequency deflection scanning device |
| US11377384B2 (en) | 2017-01-19 | 2022-07-05 | University Of Bath | Method of making an imaging fibre apparatus and optical fibre apparatus with different core |
-
2001
- 2001-02-28 CN CN 01105474 patent/CN1306296A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735198A (en) * | 2016-11-23 | 2017-05-31 | 北京航空航天大学 | A kind of electron beam High-precision high-frequency deflection scanning device |
| US11377384B2 (en) | 2017-01-19 | 2022-07-05 | University Of Bath | Method of making an imaging fibre apparatus and optical fibre apparatus with different core |
| US11577986B2 (en) | 2017-01-19 | 2023-02-14 | University Of Bath | Method of making an imaging fibre apparatus and optial fibre apparatus with different core |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |