CN1074063A - The electrode structure that is used for the colorful visualization tube electron gun - Google Patents
The electrode structure that is used for the colorful visualization tube electron gun Download PDFInfo
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- CN1074063A CN1074063A CN92114935A CN92114935A CN1074063A CN 1074063 A CN1074063 A CN 1074063A CN 92114935 A CN92114935 A CN 92114935A CN 92114935 A CN92114935 A CN 92114935A CN 1074063 A CN1074063 A CN 1074063A
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Abstract
A kind of electrode structure of electron gun, be applied in the color picture tube of large-screen receiver or high-resolution monitor, its focusing electrode is divided into first and second focusing electrodes, four utmost point electrodes of being made up of first and two electrodes are arranged between first and second focusing electrodes, any electrode is connected on the dynamic focus voltage with the fluctuation form in first and second electrodes of four utmost point electrodes, and the deflection current by deflecting coil is eliminated degenerating of resolution.First and second electrodes can form four utmost point electrodes that an integral body has the gap, are connected respectively in first and second focusing electrodes, or change height between its center and every side with opposite method, in order to compensation.
Description
The present invention relates to a kind ofly look or the electrode structure of the colorful visualization tube electron gun that in high-resolution monitor, uses, particularly relate to the improvement that the resolution in the screen periphery zone degenerates at large screen television.
As shown in fig. 1, be the electrode structure of common colorful visualization tube electron gun, it comprises: a control electrode 3, an accelerating electrode 4,5, one anodes 6 of a focusing electrode and a thermionic radome 7 of launching from an anode cap 2 in order to control, acceleration and focusing.Each electrode has three circular holes or the cylinder that passes the red, green, blue three-beam electron-beam, approximately the voltage of 200V to 500V is added to accelerating electrode 4, the quiescent voltage of about 4KV to 8KV is added to focusing electrode 5, the high voltage of about 20KV to 27KV is added to anode 6, thereby control and acceleration by electronics Be Controlled electrode 3 and accelerating electrode 4 that negative electrode 1 discharges, then, three electron beams of accelerated electron are focused on the phosphor screen by focusing electrode 5 and anode 6, form pixel.Simultaneously, by means of the oblique automatic convergeing field of the deflecting coil shown in Fig. 2 A and 2B, make electron beam auto-convergence on whole screen.
At this, tiltedly automatic convergeing field is made up of pincushion field and barrel field, and the pincushion field is the horizontal deflection magnetic field shown in Fig. 2 A, and barrel field is the vertical deflection magnetic field shown in Fig. 2 B, and each all is made of the two poles of the earth element and four utmost point elements.Shown in Fig. 3 A and Fig. 3 B, above-mentioned the two poles of the earth element plays main deflecting action in the direction of arrows to electron beam, and four above-mentioned utmost point elements force electron beam to be dispersed in the horizontal direction and convergence in vertical direction, cause the elongation of electron beam two horizontal directions.Especially at peripheral part of screen, the bright spot of electron beam can produce astigmatism.
Like this, as shown in Figure 5, described bright spot is different in the horizontal and vertical directions, and crosses focusing on phosphor screen, thereby degenerating along with increasing resolution from the screen center to the distance of screen peripheral part.So screen or deflection angle are big more, it is more bad that resolution becomes.That is, along with the deflection of electron beam, the distortion of the cross sectional shape of electron beam has increased.As shown in Figure 4, the bright spot shape of peripheral part of screen is made up of with vertical fuzzy section H the brightest long in the horizontal direction elliptical center portion C, and therefore, Bu Fen resolution degenerates around.
Because the distortion of the above-mentioned three-beam electron-beam bright spot that non-homogeneous magnetic deflection field causes, should compensate by electron beam is assembled in the horizontal direction, simultaneously, the gap that goes up from electron gun to screen the distance of each point and the distance from electron gun to the screen center should compensate by changing focus voltage.
The objective of the invention is to avoid above-mentioned the deficiencies in the prior art and a kind of electrode structure that is used for the colorful visualization tube electron gun is provided, improve the resolution of screen periphery part in color picture tube.
In order to achieve this end, the electrode structure that the present invention is used for the colorful visualization tube electron gun comprises: a control electrode that is used to control from the thermion quantity of cathode emission; One is used to quicken the accelerating electrode of Be Controlled thermion to predetermined speed; One is arranged on the accelerating electrode rear end and is used to focus on first focusing electrode that is accelerated thermion and forms first electron beam; Four utmost point electrodes of forming by first electrode and second electrode, the same with first focusing electrode, quiescent voltage is added to first electrode and the dynamic electric voltage of prescribed limit is added to second electrode, compensate the astigmatism of first electron beam; Second focusing electrode that is arranged on four utmost point electrode rear ends equally with first focusing electrode is added to second focusing electrode to quiescent voltage, in order to the electron beam that further gathering has compensated, forms second electron beam; With an anode, quicken second electron beam to phosphor screen by high pressure being added to this anode.
Four above-mentioned utmost point electrodes are divided into first and second electrodes, they can interosculate, perhaps each electrode can with first and second focusing electrodes among one be connected, like this, dynamic electric voltage is added to one of first and second electrodes, and static focus voltage is added to another electrode.
In sum, the present invention has following advantage compared to existing technology:
According to the quadrupole lens system that forms, wherein focusing electrode is divided into two, and four utmost point electrodes that are connected to dynamic electric voltage are arranged between the focusing electrode that has separated, and this just can prevent degenerating of the peripheral region resolution of shielding, reach desired focus characteristics, improved the quality of whole screen.
The invention will be further described below in conjunction with embodiment:
Brief Description Of Drawings:
Fig. 1 is the constructed profile of expression ordinary electronic rifle total;
Fig. 2 A and 2B represent the shape of relevant with automatic convergeing field on the X-Y plane electron-beam point that is formed by the ordinary electronic rifle, and Fig. 2 A is the bundle point shape figure that is formed by the pincushion field, and Fig. 2 B is the bundle point shape figure that is formed by barrel field;
Fig. 3 A and Fig. 3 B represent the analysis chart that the bundle point shape shown in Fig. 2 A and 2B degenerates with the two poles of the earth and four utmost point magnetic cells, and Fig. 3 A is the analysis chart of pincushion field; Fig. 3 B is the analysis chart of barrel field;
Fig. 4 is the shape figure by common electron gun electron-beam point of forming on screen;
Fig. 5 is the reference diagram that is used for key-drawing 4;
Fig. 6 is the schematic sectional view according to the electron gun of the embodiment of the invention;
Fig. 7 A is the perspective view that is used for first electrode of Fig. 6 electron gun four utmost point electrodes, and Fig. 7 B is its front view;
Fig. 8 A is the perspective view that is used for second electrode of Fig. 6 electron gun four utmost point electrodes, and Fig. 8 B is its front view;
Fig. 9 is the perspective view of four utmost point electrodes that combine of first and second electrodes of expression shown in Fig. 7 A and 8A;
A among Figure 10 and B are the key-drawings that is subjected to the magnetic deflection field effect according to the electron beam that electron gun of the present invention forms;
Figure 11 represents the structure chart of the electron gun quadripolar magnetic field according to the present invention;
Figure 12 shows the oscillogram that concerns between deflection current and the dynamic focus voltage;
Figure 13 is the shape figure that electron gun forms electron-beam point on screen according to the present invention;
Figure 14 is the improved electron gun constructed profile that combines between focusing electrode and four utmost point electrodes;
Figure 15 is the constructed profile according to another embodiment of the present invention electron gun;
A to C among Figure 16 is illustrated in the figure of the second focusing electrode 5de of four utmost point electrodes of opposite shown in Figure 15, and wherein the A among Figure 16 is a perspective view, and the B among Figure 16 is that the C among front view and Figure 16 is the cutaway view along C-C line among the B among Figure 16;
A to C among Figure 17 is illustrated in the figure of the second electrode 5c of four utmost point electrode 5bc shown in Figure 15, and the A among its Figure 17 is a perspective view, and the B among Figure 17 is that the C among front view and Figure 17 is the cutaway view along C-C line among the B among Figure 17;
Figure 18 is the improvement of another embodiment among expression Figure 15, is similar to the profile of Figure 15;
Figure 19 is that the another kind of another embodiment among expression Figure 15 improves, and is similar to the profile of Figure 15.
As shown in Figure 6, electron gun comprises: 22, one focusing electrodes 23 of 21, one accelerating electrodes of 20, one control electrodes of a negative electrode and an anode 24, they are arranged in delegation by a pair of glass rod (not shown in FIG.).
According to the present invention, focusing electrode 23 is divided into the first focusing electrode 23A and the second focusing electrode 23B, and four utmost point electrodes 25 are set in the middle of them.
Four utmost point electrodes 25 that are provided with between above-mentioned two focusing electrode 23A and 23B comprise the first electrode 25A and the second electrode 25B, electrode slice 26 and 27 be connected on each electrode around each electron beam through-hole, be used to form a quadrupole lens, such as will be described below.
Shown in Fig. 7 A and 7B, the first electrode 25A of described four utmost point electrodes 25 has three electron beam through-holes 28, four first electrode slices 26 are connected to the surface of the above-mentioned first electrode 25A, this surface parallels with the line of centres of electron beam through-hole 28, and first electrode slice has the arc of 1/4th girths of electron beam through-hole 28 at through hole 28 places that adjoin.
Shown in Fig. 8 A and 8B, the second electrode 25B of four above-mentioned utmost point electrodes 25 has two second electrode slices 27 on upper and lower surface, each electrode slice has the arc of 1/4th girths of an above-mentioned through hole 29 at through hole 29 each the side place that adjoin, thereby, form the periphery of electron beam through-hole with the circular arc of first electrode slice.
As shown in Figure 9, the first and second electrode 25A and the 25B of four above-mentioned utmost point electrodes 25 are combined with each other, so that first electrode slice 26 is inserted between second electrode slice 27.
According to this combination, the gap between the apparent surface of the first and second electrode 25A and 25B, and the gap between above-mentioned first and second electrode slices 26 and 27, its preferred thickness is about 0.6 to 1.0mm.
Again as shown in Figure 6, four utmost point electrodes 25 by the first and second electrode 25A and 25B constitute are positioned between the first and second focusing electrode 23A and the 23B, and they constitute focusing electrode together.
Quickened by accelerating electrode 22 after passing through control electrode 21 from negative electrode 20 electrons emitted bundles, then, electron beam forms pixel by after focusing electrode 23 and the anode 24 on screen.
According to the present invention, static focus voltage V
SFBe added on the first and second focusing electrode 23A and 23B of the first electrode 25A of four above-mentioned utmost point electrodes 25 and focusing electrode 23, and dynamic focus voltage V
DFBe added on the second electrode 25B of four utmost point electrodes 25.
As shown in figure 12, dynamic focus voltage changes along with the curvature shapes of CRT screen.Under most of situation, dynamic focus voltage changes with parabolic waveform according to the deflection current of deflecting coil.
Generally, this dynamic focus voltage V
DFDetermine at V
SF± 300V
P-POr V
SF± 600V
P-PBetween change.
Otherwise the electron beam of such vertical elongation is assembled in vertical direction by magnetic deflection field as shown in figure 10, dispersed in the horizontal direction, and its result, even also obtain the focus characteristics that meets the requirements in the peripheral region of screen, as shown in figure 13.
In the improvement of embodiment shown in Figure 6, the first electrode 25A of four utmost point electrodes 25 can be connected to the first focusing electrode 23A, as shown in figure 14, and quiescent voltage V
SFBe added to first and second focusing electrode 23A and the 23B, dynamic electric voltage V
DFBe added to the second electrode 25B of four utmost point electrodes 25.
As shown in figure 15, it is an alternative embodiment of the invention, wherein three negative electrodes 1 and a plurality of electrode 3 to 6 are in line, in the middle of these electrodes, focusing electrode is divided into the first focusing electrode 5a and the second focusing electrode 5de, in order to form a quadrupole lens with the first and second focusing electrode 5a and 5de, four utmost point electrode 5bc are inserted between the first and second focusing electrode 5a and the 5de with predetermined gap.
The first and second focusing electrode 5a and 5de connect quiescent voltage, and four utmost point electrode 5bc that are made of the first electrode 5b and the second electrode 5c connect dynamic electric voltage.Under the situation of the second electrode 5c that dynamic electric voltage is added to four utmost point electrode 5bc, the second electrode 5c has three hub sections J shown in the A to C among Figure 17, is used to pass through three-beam electron-beam.The center of each hub sections is than both sides height (h
3＞h
4), making to have an ellipse arc end face, above-mentioned end face shows as in end view with respect to horizontal line with angle θ
2An angled straight lines that constitutes is shown in the C among Figure 17.The hub sections K of the second focusing electrode 5de relative with four utmost point electrode 5bc has the shape opposite with the hub sections J of the second electrode 5c.That is, shown in the A to C among Figure 16, the both sides of each hub sections K are than height of center (h
2＞h
1), the result has an ellipse arc end face, so that constitutes the straight line that the center line with respect to hub sections K tilts towards bilateral symmetry in front view, and constitutes an angle θ with respect to horizontal line
1, shown in the B among Figure 16.
Shown in Figure 18 and 19, be another embodiment that has improved, readjust the position of four utmost point electrode 5bc and the second focusing electrode 5de, the direction that perhaps changes hub sections J and K all is possible.
Again as shown in figure 15, among the first focusing electrode 5a, four utmost point electrode 5bc and the second focusing electrode 5de that constitute above-mentioned quadrupole lens, quiescent voltage is added on the first and second focusing electrode 5a and the 5de, and dynamic electric voltage is added on four utmost point electrode 5bc, above-mentioned dynamic electric voltage is along with the deflection current of deflecting coil changes with parabolic waveform, as shown in figure 12.The peak value of above-mentioned dynamic electric voltage is generally V
SF± 300V
P-POr V
SF± 600V
P-PUnder this arrangement, when after negative electrode 1 electrons emitted bundle passes through control electrode 3, accelerating electrode 4 and the first focusing electrode 5a, during by four utmost point electrode 5bc, according to the parabola dynamic value that changes along with the screen scanning element, this electron beam is dispersed in vertical direction, and is assembled in the horizontal direction.Thereby, longer than horizontal direction at the electron beam of the peripheral region of screen scanning in vertical direction, similar with Figure 11.Like this, vertically long and electron beam that level is short because the effect of the magnetic deflection field that pincushion field and barrel field are formed, is dispersed in the horizontal direction once more and is assembled in vertical direction.Thereby even the electron beam of sector scanning also has as shown in figure 10 circle around, and the focus characteristics in the whole zone of screen becomes as Figure 13 is desired.
Claims (6)
1, a kind of electrode structure that is used for the colorful visualization tube electron gun comprises:
A control electrode that is used to control from the thermion quantity of cathode emission;
One is used to quicken the accelerating electrode of controlled thermion to predetermined speed;
One is arranged on the accelerating electrode rear end and is used to first focusing electrode that focuses on the thermion of acceleration and form electron beam;
Four utmost point electrodes of forming by first electrode and second electrode, the same for the astigmatism of compensate for electronic bundle with first focusing electrode, quiescent voltage is added to first electrode, and the dynamic electric voltage of prescribed limit is added to second electrode;
Second focusing electrode that is arranged on four utmost point electrode rear ends, the same with first focusing electrode, quiescent voltage is added to this second focusing electrode, the electron beam that has compensated in order to further focusing; With
An anode by high pressure being added to this anode, is used to quicken second electron beam to phosphor screen.
2, electrode structure according to claim 1, it is characterized in that: first electrode of four utmost point electrodes has a plurality of electrode slices, these electrode slices are connected to left side and the right side facing to a plurality of electron beam through-holes of second electrode of four utmost point electrodes, and second electrode of four utmost point electrodes has two top and following electrode slices that are connected to facing to a plurality of electron beam through-holes of first electrode of four utmost point electrodes.
3, electrode structure according to claim 1 is characterized in that: first electrode of four utmost point electrodes is connected to first focusing electrode, and quiescent voltage is added to first electrode and first focusing electrode of four utmost point electrodes, and dynamic electric voltage only is added to second electrode of four utmost point electrodes.
4, electrode structure according to claim 2 is characterized in that: at first electrode of four utmost point electrodes and second gaps between electrodes of four utmost point electrodes is between 0.6mm and 1.0mm.
5, electrode structure according to claim 2 is characterized in that: each electrode slice of first and second electrodes of four utmost point electrodes has the arc of 1/4th girths of electron beam through-hole in each side of adjoining each electron beam through-hole.
6, electrode structure according to claim 2, it is characterized in that: the centre-height of first electrode of four utmost point electrodes is lower than the both sides height of first electrode of four utmost point electrodes, the centre-height of second electrode of four utmost point electrodes is than the both sides height height of second electrode of four utmost point electrodes, each end face of first and second electrodes, they the center and both sides between form the opposing inclined line.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KRP9125242 | 1991-12-30 | ||
| KR1019910024988A KR930014732A (en) | 1991-12-30 | 1991-12-30 | Kalashnikov gun |
| KR1019910025242A KR940005494B1 (en) | 1991-12-30 | 1991-12-30 | Electron gun for c-crt |
| KR25242/91 | 1991-12-30 | ||
| KR24988/91 | 1991-12-30 | ||
| KRP9124988 | 1991-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074063A true CN1074063A (en) | 1993-07-07 |
| CN1038541C CN1038541C (en) | 1998-05-27 |
Family
ID=26628886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92114935 Expired - Fee Related CN1038541C (en) | 1991-12-30 | 1992-12-30 | Electrode structure of electronic gun in colour kinescope |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH06203765A (en) |
| CN (1) | CN1038541C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783479A (en) * | 2016-12-01 | 2017-05-31 | 西安智熔金属打印系统有限公司 | A kind of electron gun and it is applied to its electron beam selective melting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08162040A (en) * | 1994-09-14 | 1996-06-21 | Lg Electron Inc | Electron gun for color cathode-ray tube |
-
1992
- 1992-12-28 JP JP35865192A patent/JPH06203765A/en not_active Withdrawn
- 1992-12-30 CN CN 92114935 patent/CN1038541C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783479A (en) * | 2016-12-01 | 2017-05-31 | 西安智熔金属打印系统有限公司 | A kind of electron gun and it is applied to its electron beam selective melting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1038541C (en) | 1998-05-27 |
| JPH06203765A (en) | 1994-07-22 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |