CN101026075A - Electron gun and cathode ray tube - Google Patents
Electron gun and cathode ray tube Download PDFInfo
- Publication number
- CN101026075A CN101026075A CN 200610058004 CN200610058004A CN101026075A CN 101026075 A CN101026075 A CN 101026075A CN 200610058004 CN200610058004 CN 200610058004 CN 200610058004 A CN200610058004 A CN 200610058004A CN 101026075 A CN101026075 A CN 101026075A
- Authority
- CN
- China
- Prior art keywords
- focusing electrode
- electron
- electron beam
- anode
- cathode ray
- 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
Links
Images
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
This invention relates to an electronic gun including a cathode, an electronic beam forming region, an electronic lens region and high voltage lead, in which, after the beam forming region is set in the cathode, electrons generated by the cathode form at least an electronic beam, and the forming region of which includes a G1 control pole and a G2 screen pole orderly, besides, the electronic lens region is adjacent to the beam forming region for focalizing the electronic beam, the lens region includes focalizing electrodes of G3, G4 and G5, and parts of G3 and G4 are superposed, the high voltage lead is set in the lens region for connecting G3 and G5. This invention also puts forward a CRT using this gun.
Description
Technical field
The present invention relates to a kind of display element, and be particularly related to the structural design of a kind of cathode ray tube and its electron gun.
Background technology
Along with multimedia development, as the display at the communication interface of people and information, its importance also increases day by day.Use cathode ray tube (Cathode Ray Tube at present, CRT), except being applied to front projection (front projection) display (as domestic TV, monitor or computer screen etc.), for bigger display frame is provided, another kind of back projection (rear projection) technology of using built-in optical machine engine and some light path design and imaging on the display screen is also gradually ripe.
Generally speaking, use the CRT projector of back projection technology, often be applied to the occasion that family's theater, school instruction or meeting bulletin etc. need large scale to show owing to have high brightness and volume features of smaller.CRT projector on the market is in conjunction with the cathode ray tube of red (R), green (G) and blue (B) three kinds of monochromes mostly at present, makes on its display screen that is incident upon audience the place ahead respectively, so that the display effect of full-colorization to be provided.
The displaying principle of known cathode ray tube mainly is to produce electron beam by electron gun, and it is projected on the bright dipping screen.Wherein, the deflection yoke (deflection yoke) that is made of coil can be set between electron gun 110 and the bright dipping screen, use so that electron beam produces the deflection on the two-dimensional directional, and be incident upon on the ad-hoc location of bright dipping screen.In addition, the bright dipping screen can be coated with the fluorescent material of red (R), green (G) or blue different colours such as (B), in order to electron-beam reaction, and export different coloured light.
Please refer to Fig. 1, it is the schematic diagram of the electron gun in a kind of known cathode ray tube.As shown in Figure 1, known electron gun 110 has several sections such as negative electrode 112, electron beam forming area (beam forming region) 114 and electron lens area (electron lens region) 116 haply, wherein the electronics of the band energy that produced of negative electrode 110 can be incident upon in the electron beam forming area 114, and the control of the G1 by electron beam forming area 114 utmost point and G2 anode successively, with the formation electron beam.Afterwards, electron beam can be again by focusing electrodes such as G3, G4 in the electron lens area 116 and G5, and focus on the bright dipping screen.
Refer again to Fig. 1, known G3 focusing electrode and G5 focusing electrode need be connected to voltage source and produce the required electric field of focusing, therefore can be provided with a high-voltage conducting wires 118 at G3 focusing electrode and G5 focusing electrode side, in order to connect G3 focusing electrode and G5 focusing electrode.It should be noted that, owing to have gap s between known designed G3 focusing electrode and the G4 focusing electrode, when therefore causing gap s excessive as if the overtension of high-voltage conducting wires 118 or because of assembly error, the electric field that this high-voltage conducting wires 118 is produced might pass the gap, and have influence on the electron beam of electron gun 110 inside, make electron beam produce distortion.So, when the cathode ray tube projection was on audience's screen, shown image just was easy to generate the phenomenon of smear, and also therefore deterioration of the focusing effect of cathode ray tube, the quality that influence shows.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of electron gun, and it can effectively avoid the interference of peripheral electric field to the electron beam in G3 focusing electrode and the G4 focusing electrode, produces distortion to prevent electron beam.
A further object of the present invention provides a kind of cathode ray tube, and it can effectively avoid the interference of the electric field of electron gun periphery to the electron beam in G3 focusing electrode and the G4 focusing electrode, so that preferable projection quality and focusing effect to be provided.
Based on above-mentioned or other purpose, the present invention proposes a kind of electron gun, and it mainly comprises negative electrode, electron beam forming area, electron lens area and high-voltage conducting wires.Negative electrode is suitable for producing a plurality of electronics, and electron beam forming area is arranged at after the negative electrode, uses so that the electronics that negative electrode produced forms a branch of at least electron beam, and wherein this electron beam forming area comprises the G1 control utmost point and G2 anode successively.In addition, electron lens area is in abutting connection with electron beam forming area, and in order to electron beam is focused on, wherein electron lens area comprises G3 focusing electrode, G4 focusing electrode and G5 focusing electrode successively, and overlaps between G3 focusing electrode and the G4 focusing electrode.In addition, high-voltage conducting wires is arranged in the electron lens area, in order to connect G3 focusing electrode and G5 focusing electrode.
In electron gun of the present invention, the G4 focusing electrode contracts in for example in abutting connection with the aperture of an end of G3 focusing electrode, and is inserted in the G3 focusing electrode.
In electron gun of the present invention, overlap between G2 anode and the G3 focusing electrode.In one embodiment, the G3 focusing electrode contracts in for example in abutting connection with the aperture of an end of G2 anode, and is inserted in the G2 anode.
The present invention also proposes a kind of cathode ray tube, and it mainly comprises electron gun, bright dipping screen and the deflection yoke of the invention described above, and wherein, high-voltage conducting wires is arranged in the electron lens area of electron gun, in order to connect G3 focusing electrode and G5 focusing electrode.In addition, the bright dipping screen is arranged at after the electron lens area, and applies fluorescent material on the bright dipping screen surface.The deflection yoke is arranged between electron lens area and the bright dipping screen, with so that the electron beam deflecting, and is projeced on the bright dipping screen, so that electron beam reacts with fluorescent material, and exports coloured light.
In the structure of electron gun proposed by the invention, have partly overlapping between G3 focusing electrode and the G4 focusing electrode.Thus, the overlapping part of this G3 focusing electrode and G4 focusing electrode is the electric field of screening electron rifle periphery effectively, makes that the electron beam in G3 focusing electrode and the G4 focusing electrode can not be subjected to the interference of electric field, and can effectively improve the display quality of projector.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the schematic diagram of the electron gun in a kind of known kind of cathode ray tube.
Fig. 2 is the schematic diagram of a kind of electron gun of preferred embodiment of the present invention.
Fig. 3 uses a kind of generalized section of cathode ray tube of the electron gun of the foregoing description for the present invention.
The main element description of symbols
110,210: electron gun
112,212: negative electrode
114,214: electron beam forming area
116,216: electron lens area
118,218: high-voltage conducting wires
G1: the control utmost point
G2: anode
G3, G4, G5: focusing electrode
S: gap
200: cathode ray tube
220: the deflection yoke
230: the bright dipping screen
232: fluorescent material
240: body
E: electron beam
Embodiment
Please refer to Fig. 2, it is the schematic diagram of a kind of electron gun of preferred embodiment of the present invention.As shown in Figure 2, electron gun 210 of the present invention mainly comprises negative electrode 212, electron beam forming area 214, electron lens area 216 and high-voltage conducting wires 218.Wherein, negative electrode 212 can produce the electronics of a plurality of band energy, and electron beam forming area 214 is arranged at after the negative electrode 212, and electron beam forming area 214 comprises the G1 control utmost point and G2 anode successively, the electronics that is produced when negative electrode 212 can be focused into electron beam during by the G1 control utmost point and G2 anode.In addition, electron lens area 216 is in abutting connection with electron beam forming area 214, and electron lens area 216 comprises G3 focusing electrode, G4 focusing electrode and G5 focusing electrode successively, wherein overlaps between G3 focusing electrode and the G4 focusing electrode.
Refer again to Fig. 2, the G4 focusing electrode of present embodiment for example is to be scalariform in abutting connection with an end of G3 focusing electrode, and the aperture of contracting in having, and the G4 focusing electrode is inserted in the G3 focusing electrode by the position of contracting in this.In addition, high-voltage conducting wires 218 is arranged in the electron lens area 216, in order to connect G3 focusing electrode and G5 focusing electrode, wherein can make G3 focusing electrode and G5 focusing electrode be connected to external power source by this high-voltage conducting wires 218, to form focusing electric field., after entering electron lens area 216, can be subjected to the effect of G3 focusing electrode, G4 focusing electrode and G5 focusing electrode successively and restrain focusing by electron beam forming area 214 formed electron beams.In addition, also can have between the G2 anode of present embodiment and the G3 focusing electrode and overlap.Similarly, it for example is that the G3 focusing electrode is contracted in the aperture of an end of G2 anode, and is inserted in the G2 anode.
It should be noted that except as described in above-mentioned embodiment, dwindling the aperture of an end of G4 focusing electrode, make outside its method of being inserted in the G3 focusing electrode that the present invention also can reach by alternate manner and make G3 focusing electrode and the partly overlapping purpose of G4 focusing electrode.For example, the aperture of an end of the contiguous G4 focusing electrode of for example scalable G3 focusing electrode of the present invention makes the G4 focusing electrode can be inserted in the G3 focusing electrode.In addition, the present invention also can be inserted in the G3 focusing electrode in the G4 focusing electrode but change into by similar means, reaches the effect of shielding external electrical field.
Fig. 3 uses a kind of generalized section of cathode ray tube of the electron gun of the foregoing description for the present invention, wherein for making accompanying drawing comparatively clear, Fig. 3 simplifies partial component, and does not show high-voltage conducting wires 218.Please also refer to Fig. 2 and 3, the cathode ray tube 200 of present embodiment mainly comprises members such as above-mentioned electron gun 210, deflection yoke 220, bright dipping screen 230, its electron gun 210, deflection yoke 220 are for example coated by body 240, and this body 240 is connected to bright dipping screen 230.In the present embodiment, body 240 for example is a glass tube.
Refer again to Fig. 2 and 3, bright dipping screen 230 is arranged at after the electron lens area 216, and is coated with fluorescent material 232 on the bright dipping screen 230, and it for example is the fluorescent material of colors such as redness, green or blueness.In addition, deflection yoke 220 is made of coil, and it is arranged between electron gun 210 and the bright dipping screen 230, and can provide electric field so that the electron beam that electron gun 210 is sent produces the deflection on two dimension (X-Y) direction.The electron beam e that is sent by electron gun 210 can be projected onto on the ad-hoc location of bright dipping screen 230 after through deflection yoke 220, and with bright dipping screen 230 on the fluorescent material reaction, and output coloured light.
From the above, the present invention is overlapped G3 focusing electrode and G4 focusing electrode, is subjected to the electric field interference that high-voltage conducting wires 218 is produced to avoid the electron beam e in G3 focusing electrode and the G4 focusing electrode.Thus, electron beam can be focused on by electron lens area 216 time exactly, and can not be out of shape because of the interference of external electrical field.Certainly, design of the present invention also can be avoided the interference of the electromagnetic field that extraneous other factors causes except the electric field that can avoid high-voltage conducting wires 218 and produced disturbs.In addition, also, therefore can strengthen the G4 focusing electrode, make the size (db value) of vertical electron beam diminish the effect that electron beam focuses on because the aperture of G4 focusing electrode has dwindles.In addition, also because the effect that electron beam focuses on is preferable, so electron beam can be kept The better resolution (spot size) in the picture corner after being subjected to being partial to yoke 220 effects.
Above-mentioned cathode ray tube proposed by the invention can be applicable in the projector of back projection type, wherein this projector for example has a plurality of cathode ray tubes that can send different color light respectively, for example ruddiness cathode ray tube, green glow cathode ray tube and blue light cathode ray tube etc., wherein the coloured light that cathode ray tube sent by these different colours can be projeced into respectively on the display screen in audience the place ahead, and shows the image of full-colorization in synthetic back.Because electron gun of the present invention can effectively be avoided the interference of external electrical field, so this projector can improve the phenomenon of smear, and the corner of display frame can have The better resolution, and then good display quality is provided.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (8)
1. electron gun is characterized in that comprising:
Negative electrode is suitable for producing a plurality of electronics;
Electron beam forming area is arranged at after this negative electrode, uses so that above-mentioned these electronics form a branch of at least electron beam, and wherein this electron beam forming area comprises the G1 control utmost point and G2 anode successively;
Electron lens area, in abutting connection with this electron beam forming area, in order to this electron beam is focused on, wherein this electron lens area comprises G3 focusing electrode, G4 focusing electrode and G5 focusing electrode successively, and overlaps between this G3 focusing electrode and this G4 focusing electrode; And
High-voltage conducting wires is arranged in this electron lens area, in order to connect G3 focusing electrode and G5 focusing electrode.
2. electron gun according to claim 1 is characterized in that this G4 focusing electrode contracts, and is inserted in this G3 focusing electrode in the aperture of an end of this G3 focusing electrode.
3. electron gun according to claim 2 is characterized in that overlapping between this G2 anode and this G3 focusing electrode.
4. electron gun according to claim 3 is characterized in that this G3 focusing electrode contracts, and is inserted in this G2 anode in the aperture of an end of this G2 anode.
5. cathode ray tube is characterized in that comprising:
Electron gun comprises:
Negative electrode is suitable for producing a plurality of electronics;
Electron beam forming area is arranged at after this negative electrode, uses so that above-mentioned these electronics form a branch of at least electron beam, and wherein this electron beam forming area comprises the G1 control utmost point and G2 anode successively;
Electron lens area, in abutting connection with this electron beam forming area, in order to this electron beam is focused on, wherein this electron lens area comprises G3 focusing electrode, G4 focusing electrode and G5 focusing electrode successively, and overlaps between this G3 focusing electrode and this G4 focusing electrode; And
High-voltage conducting wires is arranged in this electron lens area, in order to connect the G3 focusing electrode
With the G5 focusing electrode.
The bright dipping screen is arranged at after this electron lens area, and applies fluorescent material on this bright dipping screen surface; And
The deflection yoke is arranged between this electron lens area and this bright dipping screen, with so that this electron beam deflecting, and is projeced on this bright dipping screen, so that this electron beam reacts with this fluorescent material, and exports coloured light.
6. cathode ray tube according to claim 5 is characterized in that this G4 focusing electrode contracts, and is inserted in this G3 focusing electrode in the aperture of an end of this G3 focusing electrode.
7. cathode ray tube according to claim 6 is characterized in that overlapping between this G2 anode and this G3 focusing electrode.
8. cathode ray tube according to claim 7 is characterized in that this G3 focusing electrode contracts, and is inserted in this G2 anode in the aperture of an end of this G2 anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610058004 CN101026075A (en) | 2006-02-24 | 2006-02-24 | Electron gun and cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610058004 CN101026075A (en) | 2006-02-24 | 2006-02-24 | Electron gun and cathode ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101026075A true CN101026075A (en) | 2007-08-29 |
Family
ID=38744222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610058004 Pending CN101026075A (en) | 2006-02-24 | 2006-02-24 | Electron gun and cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101026075A (en) |
-
2006
- 2006-02-24 CN CN 200610058004 patent/CN101026075A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20030014634A (en) | Projection Type Cathode Ray Tube Device Employing A Cathode Ray Tube Having A Neck Composed of Different-Diameter Portions | |
| US2248558A (en) | Television tube | |
| CN101026075A (en) | Electron gun and cathode ray tube | |
| US6815913B2 (en) | Cathode ray tube | |
| US5719542A (en) | Convergence yoke for improving focus characteristics | |
| US2152825A (en) | Braun tube | |
| JPH06283113A (en) | Color picture tube device | |
| US20070188071A1 (en) | Electron gun, cathode ray tube, and projector | |
| CN1316544C (en) | Cathode-ray tube apparatus | |
| US5343113A (en) | Cathode ray tube apparatus with reduced beam spot size | |
| US6888325B2 (en) | Method for self correcting inner pin distortion using horizontal deflection coil and deflection yoke thereof | |
| JP2765577B2 (en) | In-line type color picture tube | |
| KR100400836B1 (en) | Deflection Yoke of CRT of Transposed scan | |
| JPS5824372Y2 (en) | Denshiji Yukoutai | |
| JP3358302B2 (en) | Projection television receiver | |
| TWI307909B (en) | Electron gun, cathode ray tube, and projector | |
| JPH0922666A (en) | Color cathode ray tube | |
| US20090167143A1 (en) | Cathode ray tube including electron gun | |
| WO2003019606A1 (en) | Velocity modulation device and projection type display unit | |
| JPH03208234A (en) | Cathode ray tube device | |
| JPH06260100A (en) | Electron gun structural body | |
| JP2004079404A (en) | Cathode-ray tube for projection, and projection display device | |
| JPH0877940A (en) | Color picture tube | |
| JP2002050309A (en) | Deflection yoke and display device | |
| JPS6063857A (en) | Deflecting coil for image pickup tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |