WO2002084694A1 - Tube image couleur - Google Patents
Tube image couleur Download PDFInfo
- Publication number
- WO2002084694A1 WO2002084694A1 PCT/JP2002/003319 JP0203319W WO02084694A1 WO 2002084694 A1 WO2002084694 A1 WO 2002084694A1 JP 0203319 W JP0203319 W JP 0203319W WO 02084694 A1 WO02084694 A1 WO 02084694A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screen
- electron
- lens
- spot
- color picture
- Prior art date
Links
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
-
- 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
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
-
- 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
Definitions
- the present invention relates to a force tube used in television receivers, computer monitors and the like. In particular, it is possible to obtain high image quality even at wide deflection angles.
- the present invention relates to
- an outer envelope is formed of a panel 2 having a face portion 1 having a substantially rectangular front face and a funnel-shaped funnel 3 joined to the panel 2.
- a phosphor screen 4 is formed on the inner surface of the face portion 1, and the shadow mask 5 is held facing the phosphor screen 4.
- an electron gun 7 is provided in the neck portion 6 of the funnel 3.
- three electron beams 8 arranged in line from the electron gun 7 are emitted, and these electron beams 8 are generated by the deflection device 9 mounted on the outside of the funnel 3. While being deflected by the magnetic field, the light passes through the aperture of the shadow mask 5 to illuminate the phosphor screen 4, and the screen is projected on the face part 1.
- the deflecting magnetic field generated by the deflecting device is inline alignment direction (generally along the horizontal axis of the screen, in order to form a self-convergence configuration in which three electron beams are concentrated on one point on the screen,
- the deflecting magnetic field is inline alignment direction (generally along the horizontal axis of the screen, in order to form a self-convergence configuration in which three electron beams are concentrated on one point on the screen.
- the vertical direction because it is a direction along the vertical axis of the screen.
- the three electron beams passing through the deflection magnetic field are subjected to a lens action having a diverging action in the horizontal direction and a focusing action in the vertical direction by the deflection magnetic field.
- the lens action is intensified towards the periphery of the screen. Therefore, even if the beam spot generated in the central part of the screen is a true circle, the beam spot generated in the peripheral (especially, part of the screen) of the screen is distorted into a flat shape that is long in the horizontal direction. It tends to be overfocused in the direction and accompanied by a long low brightness haze part in the vertical direction.
- FIGS. 6A and 6B show a model showing an electron lens system in the form of an optical lens, which is the electron lens system generated by the potential difference between the electrodes of the electron gun in the first prior art, and the behavior of the electron beam passing through this electron lens system
- the upper half shows the horizontal direction (H) and the lower half shows the vertical direction (V).
- Fig. 6A shows the behavior of the electron lens system and the electron beam passing through it at the center of the screen and Fig. 6B at the periphery (corner) of the screen.
- the left end of the figure shows the crossover point of the electron beam that corresponds to the object point of the lens system, and the right end shows the spot point on the screen that corresponds to the image formation point of the lens system. 0 0,
- the incident angle to the screen is 0 i.
- the electron beam is focused with the main lens 11 only.
- the focusing action is performed in the front stage of the main lens 11 and the vertical direction.
- the intensity of the main lens 1 1 is reduced at the same time as forming a quadrupole lens 1 2 having a diverging action.
- the deflection magnetic field becomes stronger as the screen Since the action of the deflection magnetic lens 13 is canceled by the action of the quadrupole lens 12 and the difference in the distance between the center of the screen and the periphery of the screen is compensated by weakening the main lens 11, the electron beam is Just in focus on the entire screen.
- FIGS. 7A, 7B A second prior art lens system and electron beam behavior are shown in FIGS. 7A, 7B using the same approach as FIGS. 6A, 6B.
- the center of the screen (see Fig. 7A) is the same as the first prior art (Fig. 6A), but the screen periphery (corner) (see Fig. 7B) is formed by the first prior art.
- a second quadrupole lens 14 having a diverging action in the horizontal direction and a focusing action in the vertical direction is generated at a stage further ahead of the quadrupole lens 12.
- the electron beam before entering the main lens 1 1 by the second quadrupole lens 1 4 is outside in the horizontal direction.
- the difference between the screen incident angle 0 iv in the vertical direction and the screen incident angle 0 i h in the horizontal direction is reduced by narrowing inward in the vertical direction (that is, around the screen)
- the lens magnifications in the horizontal and vertical directions are approximately equal.
- the spot shape in the peripheral portion of the screen can be made close to a true circle to increase the horizontal resolution and at the same time suppress the occurrence of moiré.
- the electron beam is ideally in a just-focused state as shown by a solid line, in fact, it is incident on the screen under the influence of the spherical aberration which remarkably appears at the end of the main lens 11
- the behavior of the electron beam becomes like a broken line, resulting in an overfocused state.
- the beam spots generated at the periphery of the screen are rather distorted in a horizontally long flat shape, and the spot diameter tends to be excessive.
- the electron beam passing position of the main lens 11 in the horizontal direction is narrowed inward as much as possible in order to avoid this, the electron beam is expanded outward in the horizontal direction and narrowed inward in the vertical direction.
- the second quadruple lens 14 that plays an important role is meaningless. That is, in the prior art, when the deflection angle becomes extremely large and the deflection magnetic field becomes too strong, there is a problem that horizontal spot distortion in the horizontal direction in the peripheral portion can not be corrected. Disclosure of the invention
- An object of the present invention is to provide a color picture tube capable of reducing horizontal distortion of a spot at the periphery of the screen even when the deflection angle becomes large.
- the lens magnification in the in-line arrangement direction of the main lens portion formed in the electron gun is smaller than the lens magnification in the direction perpendicular to the in-line arrangement direction.
- “main lens portion” means the entire electron lens system formed between the crossover point of the electron beam and the spot point on the screen.
- the spot shape at the center of the screen can be made to be vertically long.
- the screen incident angle in the in-line arrangement direction of the electron beam incident on the screen center part is larger than the screen incident angle in the direction perpendicular to the in-line arrangement direction.
- the diameter in the in-line arrangement direction of the electron beam emission region of the force sword in the electron gun is small in diameter in the direction perpendicular to the in-line arrangement direction.
- FIG. 1 is a view schematically showing an example of the spot shape on the screen of the color picture tube according to the present invention.
- FIG. 2 is a perspective view showing the configuration of an electron gun of a color picture tube according to an embodiment of the present invention.
- FIG. 3A shows a model of an electron lens system of an electron gun at the center of the screen of the color picture tube according to an embodiment of the present invention in the form of an optical lens
- FIG. 3B shows a model of the electron lens system of the electron gun at the periphery of the screen of the color picture tube according to the embodiment of the present invention as an optical lens, and the behavior of the electron beam passing through the electron lens system.
- FIG. 4A shows a model of an electron lens system of an electron gun at the center of the screen of an optical lens of a color picture tube according to another embodiment of the present invention, and a behavior of an electron beam passing through the electron lens system.
- FIG. 4B is a model of an electron lens system of an electron gun at the periphery of the screen of the color picture tube according to another embodiment of the present invention, and a behavior of an electron beam passing through the electron lens system.
- FIG. FIG. 5 is a schematic cross-sectional view showing a schematic configuration of a general color picture tube.
- FIG. 6A shows a model of an electron lens system of an electron gun at the center of the screen of the color picture tube according to the first prior art, and a behavior of an electron beam passing through the electron lens system.
- FIG. 6A shows a model of an electron lens system of an electron gun at the center of the screen of the color picture tube according to the first prior art, and a behavior of an electron beam passing through the electron lens system.
- FIG. 6B shows a model of an electron lens system of an electron gun at the periphery of the screen of the color picture tube according to the first prior art as an optical lens, and the behavior of an electron beam passing through this electron lens system.
- FIG. 7A shows a model of an electron lens system of an electron gun at the center of the screen of the color picture tube according to the second prior art as an optical lens, and the behavior of the electron beam passing through the electron lens system.
- FIG. 7B shows a model of an electron lens system of an electron gun at the periphery of the screen of the color picture tube according to the second prior art as an optical lens, and the behavior of the electron beam passing through this electron lens system.
- the overall structure of the color picture tube of the present invention is substantially the same as that of the conventional color picture tube shown in FIG.
- FIG. 2 is a perspective view showing an example of an electron gun of a color picture tube according to an embodiment of the present invention.
- Three force swords 15 arranged in the horizontal axis direction of the screen, a plate-like control electrode 16 facing the force sword 15, an acceleration electrode 17, and a tubular first focusing electrode 18,
- the two focusing electrodes 19 and the anode electrode 20 are sequentially arranged and configured in the tube axis direction of the color picture tube.
- three substantially circular electron beam passage holes are formed in the control electrode 16, the acceleration electrode 17, and the surface 18 a provided on the acceleration electrode side of the first focusing electrode 18.
- the first focusing electrode 18 also has a surface 18 b on the second focusing electrode 19 side.
- the second focusing electrode 19 has a surface 19a on the first focusing electrode 18 side, and the surface 19a has three electron beam passing holes having a diameter larger in the horizontal direction than in the vertical direction (
- the second focusing electrode 19 has a surface 19 b in the cylindrical electrode, and the second focusing electrode 19 has a substantially oval shape. It has three electron beam passage holes.
- the anode electrode 20 consists of an elongated cylindrical portion 20 a and a cylindrical portion 20 b, and has three substantially circular apertures in the surface 20 c near the boundary between these two, and further, the surface 2 Have a pair of flat plates 2 3 a, 2 3 b disposed on a virtual plane parallel to the horizontal axis and the tube axis, sandwiching the three apertures vertically on the side of the force sword 1 5 of 0 c There is.
- the first focusing voltage Vfocl is applied to the first focusing electrode 18, and the dynamic voltage V dyn is superimposed on the second focusing voltage V foc 2 in the second focusing electrode 19.
- the applied voltage is applied, and a high voltage Va is applied to the anode electrode 20.
- FIGS. 3A and 3B A model showing the electron lens system of the electron gun in the form of an optical lens and the behavior of the electron beam passing through the electron lens system in the case of this configuration are shown in FIGS. 3A and 3B. It is shown in cross section along the deflection direction.
- Fig. 3A shows the central part of the screen and
- Fig. 3B shows the peripheral part of the screen.
- the upper half shows the horizontal direction (H) and the lower half shows the vertical direction (V).
- the left end of the figure shows the crossover point of the electron beam that corresponds to the object point of the lens system, and the right end shows the spot point on the screen that corresponds to the imaging point of the lens system.
- the incident angle to the screen is 0 i.
- a quadrupole lens 24 having a focusing action in the horizontal direction and a diverging action in the vertical direction is formed at the rear stage (screen side) of the main lens 11.
- a quadrupole lens having a diverging action in the horizontal direction and a focusing action in the vertical direction between the first focusing electrode and the second focusing electrode, ie, immediately before the main lens 1 (crossover point side), ie, between the first focusing electrode and the second focusing electrode. 5 is formed.
- the four-pole lens 25 immediately before the main lens 11 is weakened and disappears, as shown in FIG. 3B.
- the lens system is composed of a main lens 11, a four-pole lens 24 immediately after the main lens, and a deflection magnetic lens 13.
- the screen incident angle ⁇ in the horizontal direction becomes larger than the screen incident angle ⁇ in the vertical direction at the center of the screen. Therefore, since the lens magnification in the horizontal direction is smaller than the lens magnification in the vertical direction, the spot shape at the center of the screen becomes a vertically long shape.
- the spot shape of the electron beam tends to be distorted in a horizontally long (in the inline direction, flat) in the peripheral portion compared to the central portion of the screen.
- the present invention is a technique for improving spot distortion in the peripheral part of the screen by making the spot shape in the central part of the screen into a vertically small and vertically long vertical shape by the above configuration.
- the horizontal screen incident angle ⁇ ⁇ and the vertical screen incident angle 0 iv can be made close to each other almost equally.
- the electron beam does not pass through the end of the main lens, it is not affected by spherical aberration and does not become overfocused.
- the spot shape on the screen can be modeled as shown in Figure 1.
- the shape of the spot 26 at the center of the screen vertically long, the shape of the spot 27 at the periphery (corner) of the screen can be as close as possible to a perfect circle. Therefore, the resolution in the horizontal direction around the screen can be improved, and at the same time the occurrence of moiré can be reduced.
- the quadrupole lens 28 having a focusing action in the horizontal direction and a diverging action in the vertical direction at the center of the screen is crossed over on the crossover point side. It may further be provided. In this way, the electron beam passing position of the main lens 11 can be made more in the horizontal direction and further outward in the vertical direction at the center of the screen, so it is vertically elongated at the center of the screen.
- the spot shape can be adjusted to the extent that the vertical resolution is not reduced as much as possible.
- the quadrupole lenses 25 and 28 formed at the center of the screen be weakened as the deflection angle increases and not be the periphery (corner) of the screen (see FIG. 4B).
- the electron beam emission region of the force sword in the electron gun may be shaped so that the horizontal dimension is smaller than the vertical dimension.
- the spot at the center of the screen of the phosphor screen is the electron beam emission area of the cathode mapped onto the phosphor screen by the electrostatic lens of the electron gun, so the horizontal diameter of the electron beam emission area of the cathode is vertical. If it is smaller than the direction diameter, the spot shape at the center of the screen of the phosphor screen is made smaller in the horizontal direction and larger in the vertical direction. be able to.
- the horizontal diameter of the electron beam passage hole of the control electrode is made smaller than the vertical diameter, or the plate thickness in the horizontal direction of the control electrode is thicker than the plate thickness in the vertical direction In addition, it is preferable that the horizontal diameter of the electron beam passage hole of the acceleration electrode be made larger than the vertical diameter.
- the electron beam is often arranged inline in the horizontal direction of the screen. Therefore, in the embodiment of the present invention, the inline arrangement direction is referred to as the horizontal direction, and the inline arrangement direction is perpendicular to the inline arrangement direction. Such direction is referred to as the vertical direction. However, for example, in the case of using an electron gun in which the in-line arrangement direction of the electron beam is the vertical direction of the screen, the in-line arrangement direction becomes the vertical direction contrary to the above embodiment. It goes without saying that the direction is horizontal.
- the number and the shape of the electrodes constituting the electron gun, and the number and the shape of the electron beam passage holes formed in each electrode are not limited to the examples described in the above embodiment, but may be appropriately selected depending on the purpose. It may be changed to
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/470,371 US7071606B2 (en) | 2001-04-06 | 2002-04-03 | Color picture tube |
EP02714418A EP1376644A4 (en) | 2001-04-06 | 2002-04-03 | COLOR TUBE |
KR10-2003-7011063A KR100538046B1 (ko) | 2001-04-06 | 2002-04-03 | 컬러 수상관 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-108177 | 2001-04-06 | ||
JP2001108177A JP4120177B2 (ja) | 2001-04-06 | 2001-04-06 | カラー受像管 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002084694A1 true WO2002084694A1 (fr) | 2002-10-24 |
Family
ID=18960369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/003319 WO2002084694A1 (fr) | 2001-04-06 | 2002-04-03 | Tube image couleur |
Country Status (6)
Country | Link |
---|---|
US (1) | US7071606B2 (ja) |
EP (1) | EP1376644A4 (ja) |
JP (1) | JP4120177B2 (ja) |
KR (1) | KR100538046B1 (ja) |
CN (1) | CN1248282C (ja) |
WO (1) | WO2002084694A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005332675A (ja) * | 2004-05-19 | 2005-12-02 | Matsushita Toshiba Picture Display Co Ltd | カラーブラウン管装置 |
EP1632978A1 (en) * | 2004-06-30 | 2006-03-08 | Matsushita Toshiba Picture Display Co., Ltd. | Electron gun for cathode-ray tube and color cathode-ray tube equipped with the same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4722210Y1 (ja) * | 1968-05-16 | 1972-07-20 | ||
JPH06236738A (ja) * | 1992-12-07 | 1994-08-23 | Gold Star Co Ltd | カラーブラウン管用電子銃の集束電極およびその製造方法 |
JPH07147129A (ja) * | 1993-11-24 | 1995-06-06 | Nec Kansai Ltd | 陰極線管及び陰極線管用の電界放出型陰極 |
JPH10289671A (ja) * | 1997-04-14 | 1998-10-27 | Toshiba Corp | カラー受像管 |
JPH11167880A (ja) * | 1997-12-04 | 1999-06-22 | Toshiba Electronic Engineering Corp | カラーブラウン管 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6199249A (ja) | 1984-10-18 | 1986-05-17 | Matsushita Electronics Corp | 受像管装置 |
US5061881A (en) | 1989-09-04 | 1991-10-29 | Matsushita Electronics Corporation | In-line electron gun |
JP2938476B2 (ja) | 1989-09-04 | 1999-08-23 | 松下電子工業株式会社 | カラー受像管装置 |
JP3339059B2 (ja) * | 1991-11-14 | 2002-10-28 | ソニー株式会社 | 陰極線管 |
JPH05135708A (ja) | 1991-11-14 | 1993-06-01 | Sony Corp | 陰極線管 |
JPH05290756A (ja) * | 1992-04-10 | 1993-11-05 | Toshiba Corp | カラー受像管 |
KR100314540B1 (ko) * | 1993-06-01 | 2001-12-28 | 이데이 노부유끼 | 음극선관용전자총 |
JP3576217B2 (ja) * | 1993-09-30 | 2004-10-13 | 株式会社東芝 | 受像管装置 |
JPH08212947A (ja) | 1994-11-21 | 1996-08-20 | Sony Corp | ビームインデックス形陰極線管 |
TW534451U (en) | 1997-01-30 | 2003-05-21 | Toshiba Kk | Color ray tube |
JPH1131464A (ja) | 1997-07-11 | 1999-02-02 | Sony Corp | カラー陰極線管の電子銃 |
TW440885B (en) * | 1998-03-13 | 2001-06-16 | Toshiba Corp | Cathode-ray tube |
-
2001
- 2001-04-06 JP JP2001108177A patent/JP4120177B2/ja not_active Expired - Fee Related
-
2002
- 2002-04-03 US US10/470,371 patent/US7071606B2/en not_active Expired - Fee Related
- 2002-04-03 WO PCT/JP2002/003319 patent/WO2002084694A1/ja not_active Application Discontinuation
- 2002-04-03 KR KR10-2003-7011063A patent/KR100538046B1/ko not_active IP Right Cessation
- 2002-04-03 CN CNB028078713A patent/CN1248282C/zh not_active Expired - Fee Related
- 2002-04-03 EP EP02714418A patent/EP1376644A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4722210Y1 (ja) * | 1968-05-16 | 1972-07-20 | ||
JPH06236738A (ja) * | 1992-12-07 | 1994-08-23 | Gold Star Co Ltd | カラーブラウン管用電子銃の集束電極およびその製造方法 |
JPH07147129A (ja) * | 1993-11-24 | 1995-06-06 | Nec Kansai Ltd | 陰極線管及び陰極線管用の電界放出型陰極 |
JPH10289671A (ja) * | 1997-04-14 | 1998-10-27 | Toshiba Corp | カラー受像管 |
JPH11167880A (ja) * | 1997-12-04 | 1999-06-22 | Toshiba Electronic Engineering Corp | カラーブラウン管 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1376644A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN1524282A (zh) | 2004-08-25 |
KR20030080024A (ko) | 2003-10-10 |
US20040113534A1 (en) | 2004-06-17 |
EP1376644A4 (en) | 2007-10-17 |
CN1248282C (zh) | 2006-03-29 |
JP2002304955A (ja) | 2002-10-18 |
JP4120177B2 (ja) | 2008-07-16 |
EP1376644A1 (en) | 2004-01-02 |
KR100538046B1 (ko) | 2005-12-20 |
US7071606B2 (en) | 2006-07-04 |
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