CN1108798A - Electron gun for a color picture tube - Google Patents
Electron gun for a color picture tube Download PDFInfo
- Publication number
- CN1108798A CN1108798A CN94113073A CN94113073A CN1108798A CN 1108798 A CN1108798 A CN 1108798A CN 94113073 A CN94113073 A CN 94113073A CN 94113073 A CN94113073 A CN 94113073A CN 1108798 A CN1108798 A CN 1108798A
- Authority
- CN
- China
- Prior art keywords
- electron beam
- lens
- hole
- electrode
- focusing electrode
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/48—Electron guns
- H01J2229/4834—Electrical arrangements coupled to electrodes, e.g. potentials
- H01J2229/4837—Electrical arrangements coupled to electrodes, e.g. potentials characterised by the potentials applied
- H01J2229/4841—Dynamic potentials
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Cold Cathode And The Manufacture (AREA)
Abstract
An inproved electron gun for a color picture tube is disclosed. The gun according to present invention has a triple electrodes part as a source of the electron beam, and prefocusing and main lens part for focusing and accelerating the beam. The prefocusing lens part includes a plurality of focusing electrodes for forming at least one quadrapole lens in which the intensity of vertical lens is weaker than that of horizontal lens. According to the present invention, the effect of the spherical aberration to the beam entering the main lens can be reduced.
Description
The present invention relates to color kinescope.Be particularly related to the tricolour picture tube I-shaped electron gun.
Color kinescope is installed in the neck and produces hot electron.It generally includes the ternary electrod assembly with one or more negative electrodes as thermionic source, pre-focused lens component and form the main lens parts that electromagnetic lens is used by potential difference.
When having added than the high voltage of other electrodes on the electrode of main lens parts, the magnification ratio of the main electromagnetic lens of Xing Chenging increases betwixt, makes the electron beam that passes that big spherical aberration be arranged.For reducing the spherical aberration of main lens parts, normally adopt to have to allow the cup ring electrode 10 of the big electron beam through-hole 11 that three-beam electron-beam passes through simultaneously, reducing the magnification ratio of electromagnetic lens, and reduce spherical aberration.The main lens magnification ratio that has reduced can not make the gratifying focusing of electron beam but in this case.Therefore, between main lens parts and ternary electrod assembly, constitute a prefocus lens assembly, so that the electron beam segmentation of launching from ternary electrode focuses on.
In the typical pre-focused lens component, the focusing electrode that many band electron beam through-holes are arranged, between ternary electrod assembly and main lens parts, form a plurality of quadrupole lenss with these electrodes, the voltage of ternary electrod assembly will be added to, or add to the high pressure of the anode that constitutes the main lens parts, optionally add to these electrodes, electron beam is focused on.But, add higher or low voltage for the electrode of above-mentioned pre-focused lens component, can make to form the magnification ratio electromagnetic lens between these electrodes, lens spherical aberration component is increased, and cause interelectrode lonely light discharge.
The objective of the invention is, a kind of color kinescope is provided, it can reduce the spherical aberration effect by the electron beam of pre-focused lens component, and prevents the electron beam transversely deforming, makes and obtain uniform electron-beam point on whole phosphor screen.
Another object of the present invention is, a kind of color kinescope is provided, and it has improved the assembly precision of electrode and glass rod.
For achieving the above object,, has ternary electrod assembly as electron beam source by color kinescope of the present invention; With the pre-focused lens component of the coaxial manufacturing of ternary electrod assembly, be used for focusing on and quicken the electron beam of launching by ternary electrod assembly; With main lens parts, it is characterized in that:
Pre-focused lens component comprises a plurality of focusing electrodes, optionally adds two different focus voltages for these electrodes, forms at least one quadrupole lens, a little less than wherein the intensity of the horizontal lens of strength ratio of vertical electromagnetic lens is wanted.
According to a scheme of the present invention, these two focus voltages are reduced in 20% to 25% the scope of anode voltage of main lens parts.
By the detailed description of carrying out below in conjunction with embodiment, these purposes of the present invention, the advantage of other purposes and invention can further embody.
Fig. 1 is the perspective view of the electrode used of the formation macropore lens of conventional color kinescope;
Fig. 2 is by the cutaway view of the pre-focused lens component of color kinescope of the present invention, shows voltage adder;
Fig. 3 is the schematic diagram that is illustrated in the electron beam through-hole shape of the electron beam terminal edge of formation electrode of pre-focused lens component shown in Figure 2 and transmitting side;
Fig. 4 is the figure of expression with the track of the electron beam after the pre-focused lens component horizontal focusing of electron gun of the present invention;
Fig. 5 is the figure of expression with the track of the electron beam after the pre-focused lens component vertical focusing of electron gun of the present invention.
Comprise according to color kinescope of the present invention: a ternary electrod assembly, it comprises the negative electrode as thermionic source, a control electrode and a bucking electrode; One pre-focused lens component, it has a plurality of focusing electrodes, optionally adds different focus voltages respectively for these electrodes, and to constitute at least one quadrupole lens, wherein the intensity of vertical lens is stronger than the intensity of horizontal lens; With main lens parts, it is made and an anode electrode is arranged with pre-focused lens component is coaxial, adds anode voltage on it, to form main lens.
In the pre-focused lens component that the electron beam that focuses on and quicken to enter the main lens parts is used, constitute first to fourth electrode 21 from ternary three electrod assemblies order, 22,23,24, as shown in Figure 2, give the second and the 4th electrode 22,24 making alives are 6000 to 7000 volts the first focus voltage VF1, give first and third electrode 21,23 making alives be 7000 to 9000 volts the second focus voltage VF2.
Here, the first and second focus voltage VF1 and VF2 are preferably constant by above-mentioned voltage, but institute's making alive voltage for example in 20% to 25% the scope of 30KV, in order to form main lens of preferably being added to anode here.And these two focus voltage VF1 and VF2 are best and defection signal is synchronous.
Form the electromagnetic lens of electron beam through-hole respectively on each electrode in the focusing electrode 21,22,23,24 first to fourth to be constructed as follows.
Referring to Fig. 3, form three kinds of circular electron beams respectively by hole (21R, 21G at the electron beam terminal edge of first focusing electrode 21 and initial edge with at the electron beam terminal edge of the 4th focusing electrode 24,21B), (21R ', 21G ', 21B '), (22R, 22G, 22B).And at the electron beam initial edge of second focusing electrode 22 and the electron beam terminal edge of the 4th electrode 24, respectively in be formed centrally the electron beam through-hole 22G ' of vertical prolongation, 24G, every side form two circles electron beam through-hole (22R ', 22B '), (24R, 24B).Inject and initial edge at the 3rd electron beam that focuses on electrode 23, initial edge at the 4th electrode 24, constitute circular electron beam through hole (23G, 23G ', 24G ') respectively at the center, constitute two electron beam through-hole (23R of extending transversely in every side, 23B), (23R ', 23B '), (24R ', 24B ').In a manner described, at vertical elongated pore 22G ', the top and bottom of 24G and extending transversely hole (23R, 23B), (23R ', 23B '), each side of (24R ', 24B ') is preferably formed as the shaped form of regulation curvature.The 3rd focus on the through hole that electrode 23 both sides form (23R, 23B), the center of (23R ', 23B ') is than the through hole 22R ' of second focusing electrode 22, preset distance is outwards departed from the center of 22B '.At the extending transversely hole 24R ' that the electron beam initial edge of the 4th focusing electrode 24 forms, preset distance is inwardly departed from than the center in those holes of adjacent electrode in the center of 24B '.In the electron beam through-hole that each focusing electrode place forms, the height in the diameter of circular hole and side extending transversely hole preferably increases or identical with it gradually since its size of first focusing electrode.In three holes that the adjacent electrode relative edge forms, have a pair of have identical diameter or height at least.
The working condition of electron gun of the present invention will be described now.
The electron beam that goes out from the cathode emission of ternary electrod assembly prefocus and quickening pre-focused lens component then, enters the main lens parts.At the pre-focused lens component place, first to fourth focusing electrode, 21,22,23,24 sequence arrangement.Add the first focus voltage VF1 for the second and the 4th focusing electrode 22,24, add the second focus voltage VF2 for the first and the 3rd focusing electrode 21,23.To form the biopotential type electromagnetic lens.Shown in Figure 4 and 5.Because the potential difference that is added between the first and second voltage VF1, the VF2 on each electrode is not too big, therefore, the magnification ratio of the electromagnetic lens that forms between each electrode is less.
As a result, by at each focusing electrode 21,22, the electron beam of the electromagnetic lens that forms between 23,24 has little spherical aberration.Particularly, in order to constitute quadrupole lens, at first to fourth focusing electrode 21,22, form vertical elongated pore 22G ', 24G and extending transversely hole (23R between 23,24,23B), (23R ', 23B ') time, the convergence of the horizontal component of electron beam is greater than dispersing, dispersing of electron beam vertical component greater than convergence, as shown in Figure 4.
The result, when electron beam enters the main lens (not shown), the electron beam horizontal component is by the main lens core, the vertical component of electron beam is by peripheral part of main lens, therefore, vertical component has bigger spherical aberration than horizontal component, makes the electron-beam point that drops on the phosphor screen form circle.
And the diameter or the height of the electron beam through-hole of first to fourth focusing electrode 21,22,23,24 of formation electron gun prefocus parts increase successively from first focusing electrode 21, or keep identical, can improve the aligning of each focusing electrode in the assembling.Be assembled in the assembly of electron gun at electrode member, all insert one or more support sticks in the electron beam through-hole of each electrode, pressurize with the intercalation electrode support to two glass rods from every limit of electrode then.According to the present invention, can reduce the support stick diameter gradually so that without any the space fix each electrode, improve the aligning of assembling.
As mentioned above, according to color kinescope of the present invention, in prefocus lens, form many electromagnetic lenses, electron beam is carried out multistage focusing, the spherical aberration of the electron beam that passes with minimizing, reduce the incidence angle of main lens parts, drop on the focus characteristics of the electron beam on the phosphor screen with improvement.
Claims (11)
1, a kind of color kinescope, have ternary electrod assembly, prefocus parts as electron beam source, with main lens parts in order to the electron beam that focuses on and quicken to launch by said ternary electrode assemblie, it is characterized in that, described pre-focused lens component comprises the focusing electrode of a plurality of at least one quadrupole lens of formation, wherein, a little less than the intensity of the horizontal lens of strength ratio of vertical electromagnetic lens is wanted.
2, press the electron gun of claim 1, it is characterized in that, form the described pre-focused lens component that described quadrupole lens is used, comprise first to fourth focusing electrode of installing in order from described ternary electrod assembly, in order to form said quadrupole lens, wherein, a little less than the intensity of the horizontal lens of strength ratio of vertical electromagnetic lens is wanted, with add first focus voltage for the described second and the 4th focusing electrode, give the described first and the 3rd to focus on electrode and add second focus voltage higher than described first focus voltage.
By the electron gun of claim 2, it is characterized in that 3, described first and second focus voltages are reduced in 20% to 25% the scope of the anode voltage that adds to main lens electrode.
4, press the electron gun of claim 1 or 2, it is characterized in that, the effect of the electron beam through-hole of the vertical prolongation that forms by center at the electron beam terminal edge of the electron beam initial edge of described second focusing electrode and described the 4th focusing electrode, the effect of the electron beam through-hole of the extending transversely at the every side place that penetrates with the electron beam of described the 4th focusing electrode has constituted described quadrupole lens.
By the electron gun of claim 4, it is characterized in that 5, the center of the electron beam through-hole of the described extending transversely that forms at the described electron beam initial edge of described the 4th focusing electrode is inwardly departed from than the center of the electron beam through-hole that forms at its electron beam terminal edge.
6, by any electron gun in the claim 2 or 3, it is characterized in that, described first focus voltage in 6000 to 7000V scopes and described second focus voltage in 7000 to 9000V scopes.
7, by the electron gun of claim 4, it is characterized in that the diameter of the described electron beam through-hole of described first to fourth focusing electrode or height increase gradually or keep identical from described first focusing electrode.
8, by the electron gun of claim 4, it is characterized in that in the electron beam through-hole of two adjacent focusing electrodes in described first to fourth focusing electrode, having at least a pair ofly to have identical diameter or width by the hole.
9, press the electron gun of claim 4, it is characterized in that, inject the center of the electron beam through-hole of the described extending transversely that the every side with initial edge forms at the described the 3rd electron beam that focuses on electrode, outwards depart from than the center of the electron beam through-hole that forms on described second focusing electrode.
10, by the electron gun of claim 2, it is characterized in that,
In three electron beam through-holes that the electron beam initial edge of described four focusing electrode adjacent with described main lens parts forms, two side openings are extending transverselies, and centre bore is round.
11, by the electron gun of claim 10, it is characterized in that the center in the hole of the described extending transversely that forms at the described electron beam initial edge of described the 4th focusing electrode is inwardly compared with the center in the hole that forms at its electron beam terminal edge and to be departed from.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR26168/93 | 1993-11-30 | ||
| KR1019930026168A KR950015511A (en) | 1993-11-30 | 1993-11-30 | Electron gun for colored cathode ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1108798A true CN1108798A (en) | 1995-09-20 |
Family
ID=19369663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94113073A Pending CN1108798A (en) | 1993-11-30 | 1994-11-29 | Electron gun for a color picture tube |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0655763A1 (en) |
| JP (1) | JPH0817359A (en) |
| KR (1) | KR950015511A (en) |
| CN (1) | CN1108798A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09500488A (en) * | 1994-05-06 | 1997-01-14 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Display device and cathode ray tube |
| JPH1021847A (en) * | 1996-07-03 | 1998-01-23 | Sony Corp | Electron gun for color cathod-ray tube |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS598246A (en) * | 1982-07-05 | 1984-01-17 | Toshiba Corp | Electron gun |
| KR910007654Y1 (en) * | 1988-11-02 | 1991-09-30 | 삼성전관 주식회사 | Electron gun of multi-step focusing crt |
| KR940000601Y1 (en) * | 1991-09-27 | 1994-02-02 | 삼성전관 주식회사 | Electron gun |
| DE4233955A1 (en) * | 1992-05-19 | 1993-11-25 | Samsung Electronic Devices | Electron gun for colour cathode ray tube - compensates focusing strength of electron beam due to change in strength of main focusing lens using first dynamic quadrupole pre-focussing lens. |
-
1993
- 1993-11-30 KR KR1019930026168A patent/KR950015511A/en not_active Application Discontinuation
-
1994
- 1994-11-28 EP EP94118716A patent/EP0655763A1/en not_active Withdrawn
- 1994-11-29 CN CN94113073A patent/CN1108798A/en active Pending
- 1994-11-29 JP JP6295397A patent/JPH0817359A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0655763A1 (en) | 1995-05-31 |
| KR950015511A (en) | 1995-06-17 |
| JPH0817359A (en) | 1996-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |