CN203491211U - Zero-acceleration strong-convergence electronic optical system for head-up projection display tube - Google Patents
Zero-acceleration strong-convergence electronic optical system for head-up projection display tube Download PDFInfo
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- CN203491211U CN203491211U CN201320534898.1U CN201320534898U CN203491211U CN 203491211 U CN203491211 U CN 203491211U CN 201320534898 U CN201320534898 U CN 201320534898U CN 203491211 U CN203491211 U CN 203491211U
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Abstract
The utility model discloses a zero-acceleration strong-convergence electronic optical system for a head-up projection display tube. The system comprises an electronic emission system (1), an acceleration system (2) and a focusing system (3). The electronic emission system (1) is internally provided with a zero-acceleration low-potential ring (1-1), and the focusing system (3) is internally provided with a strong-convergence electrode (3-1). The zero-acceleration strong-convergence electronic optical system provided by the utility model has the advantages of reasonable structure, high luminance, high resolution, reliable performance, long service life and wide application range, overcoming the defects in the prior art.
Description
Technical field
The utility model relates to a kind of display tube, be specifically related to a kind of look squarely Projection Display effective zero accelerate, assemble by force electron-optical system.
Background technology
Look squarely effective zero the accelerating, assemble by force electron-optical system and relate to and utilize electron-optical system and fluorescence radiation face electronic signal to be converted to the cathode ray tube of display frame and picture signal of Projection Display.Existing cathode ray tube of the same type be mainly used in that looking squarely of aircraft cockpit shows and under look demonstration.Operation principle is: under vacuum state, acceleration by the cathode electron beam of filament heating through the place ahead accelerating electrode, enter again prefocus, main focusing lens is focused into thin electron beam, finally by tens thousand of volt high pressure, attracted excitated fluorescent powder on phosphor screen, form the luminous point that can regulate, under the effect of deflecting coil, form the grating of scanning all over the screen, now from the negative electrode of cathode ray tube, send into vision signal or VGA signal, just can on phosphor screen, clearly observe the information such as the various images sent into, data, signal.Existing electron-optical system has adopted prefocus and prime focus structure, and electron beam can not be converged to by force thin electron beam, thereby affects resolution; The power of electron emissive system is undesirable; The setting of accelerating field position disperses electron beam, produces secondary electron, and resolution is low.
Therefore, necessary on prior art basis a kind of reasonable in design of design research and development, brightness is high, good resolution, response time are short, the electron-optical system of long service life.
Summary of the invention
Goal of the invention: the purpose of this utility model is in order to solve the deficiencies in the prior art, a kind of reasonable in design is provided, brightness is high, good resolution, response time are short, dependable performance, long service life look squarely Projection Display effective zero accelerate, assemble by force electron-optical system.
Technical scheme: in order to realize above object, technical solution adopted in the utility model is:
A kind of look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, it comprises electron emissive system, accelerating system and focusing system, in described electron emissive system, be provided with zero and accelerate electronegative potential ring, in described focusing system, be provided with strong convergence electrode.
As preferred version, above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, described zero inlet diameter that accelerates electronegative potential ring than outlet diameter little 2 to 10mm.The utility model is provided with zero acceleration electronegative potential ring can produce electric field shielding effect, makes electron beam can not get on electrode cylinder and produce secondary electron, dwindles spot diameter, improves resolution.
As preferred version, above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, the outlet diameter of strong convergence electrode is inlet diameter 1/2nd to 1/3rd, is conducive to acceleration, the focusing of electron beam, has improved resolution.The utility model adopts high-tension strong convergence electron-optical system, thereby makes electron beam obtain the strong effect of assembling, and can greatly improve resolution.
As preferred version, above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, zero to accelerate electronegative potential ring and the distance between convergence electrode be by force 0.85 to 2.35mm.
As preferred version, above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, the diameter of described electron-optical system is 17 to 29mm, length is 58 to 88mm.
As preferred version, above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, adopt in the cylinder that is 5～10mm at diameter the oxide coated cathode that consumed power is 0.5 ~ 2W be set.
Described in the utility model look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, the course of work is: the cathode emission by filament heating goes out electron beam, electron beam accelerates electronegative potential ring through the place ahead zero, enter again strong convergent lens system, be focused into thin electron beam, finally by tens thousand of volt high pressure, attracted excitated fluorescent powder on phosphor screen, form the luminous point that can regulate, thereby improve resolution.
Beneficial effect: the utility model provides looks squarely effective zero the accelerating, assemble electron-optical system by force and compare and have the following advantages with prior art photomultiplier of Projection Display:
The utility model provides looks squarely effective zero the accelerating, assemble electron-optical system by force of Projection Display, reasonable in design, and brightness is high, good resolution, dependable performance, long service life, has wide range of applications, and can overcome many deficiencies of prior art.
Accompanying drawing explanation
Fig. 1 looks squarely the zero effective structural representation that accelerates, assembles by force electron-optical system of Projection Display for what the utility model provided.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only for the utility model is described, be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
As shown in Figure 1, a kind of look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, it comprises electron emissive system (1), accelerating system (2) and focusing system (3), in described electron emissive system (1), be provided with zero and accelerate electronegative potential ring (1-1), in described focusing system (3), be provided with strong convergence electrode (3-1).
Above-described zero inlet diameter that accelerates electronegative potential ring (1-1) than outlet diameter little 2 to 10mm.
The outlet diameter of above-described strong convergence electrode (3-1) is inlet diameter 1/2nd to 1/3rd.
Above-described look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, wherein zero to accelerate electronegative potential ring (1-1) and the distance between convergence electrode (3-1) be by force 0.85 to 2.35mm.
Described in the utility model look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, the diameter of described electron-optical system is 17 to 29mm, length is 58 to 88mm.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
- One kind look squarely Projection Display effective zero accelerate, assemble by force electron-optical system, it is characterized in that, it comprises electron emissive system (1), accelerating system (2) and focusing system (3), in described electron emissive system (1), be provided with zero and accelerate electronegative potential ring (1-1), in described focusing system (3), be provided with strong convergence electrode (3-1).
- 2. according to claim 1ly look squarely effective zero the accelerating, assemble electron-optical system by force of Projection Display, it is characterized in that, zero inlet diameter that accelerates electronegative potential ring (1-1) than outlet diameter little 2 to 10mm.
- 3. according to claim 1ly look squarely effective zero the accelerating, assemble electron-optical system by force of Projection Display, it is characterized in that, the outlet diameter of strong convergence electrode (3-1) is inlet diameter 1/2nd to 1/3rd.
- 4. according to claim 1ly look squarely effective zero the accelerating, assemble electron-optical system by force of Projection Display, it is characterized in that, zero to accelerate electronegative potential ring (1-1) and the distance between convergence electrode (3-1) be by force 0.85 to 2.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534898.1U CN203491211U (en) | 2013-08-30 | 2013-08-30 | Zero-acceleration strong-convergence electronic optical system for head-up projection display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320534898.1U CN203491211U (en) | 2013-08-30 | 2013-08-30 | Zero-acceleration strong-convergence electronic optical system for head-up projection display tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491211U true CN203491211U (en) | 2014-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320534898.1U Expired - Fee Related CN203491211U (en) | 2013-08-30 | 2013-08-30 | Zero-acceleration strong-convergence electronic optical system for head-up projection display tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491211U (en) |
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2013
- 2013-08-30 CN CN201320534898.1U patent/CN203491211U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20160830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |