CN202306118U - Laser cathode ray tube (CRT) projection system capable of exciting laminar electron beam by constant voltage - Google Patents
Laser cathode ray tube (CRT) projection system capable of exciting laminar electron beam by constant voltage Download PDFInfo
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- CN202306118U CN202306118U CN2011204250830U CN201120425083U CN202306118U CN 202306118 U CN202306118 U CN 202306118U CN 2011204250830 U CN2011204250830 U CN 2011204250830U CN 201120425083 U CN201120425083 U CN 201120425083U CN 202306118 U CN202306118 U CN 202306118U
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Abstract
The utility model relates to the field of electronic technology, in particular to a projection system. The utility model particularly provides a laser cathode ray tube (CRT) projection system capable of exciting a laminar electron beam by constant voltage, which comprises a light source system, an optical prism and a projection optical system, and is characterized in that the light source system comprises three laser CRTs used for generating laser; the colors of the laser sources generated by the three laser CRTs are respectively one in three-primary colors; the three laser CRTs form a beam of three-color composite light respectively through the optical prism; and a laminar electron gun is adopted as an electron gun of the laser CRTs. After the technical scheme is adopted, the laser CRT projection system combines the advantages of the CRT and laser; the laser sources can be output without expensive modulating equipment; and the laser CRT projection system has the advantages of removing laser speckle, being good in controllability, and the like.
Description
Technical field
The utility model relates to electronic technology field, is specifically related to a kind of optical projection system.
Background technology
Along with the rise of miniaturization, portable electric appts, existing projector equipment adopts the projector equipment of hand-held, low power consumption usually, and the light source that is suitable for this type of projector equipment most is LASER Light Source or light emitting diode light source.Wherein, LASER Light Source has extensively been thought low power consumption, the high high efficiency light source of brightness.
Optical projection system utilizes photomodulator to convert the light that penetrates from light source into image frame.This kind photomodulator normally utilizes porjection type/reflection LCD, the liquid crystal on silicon of liquid crystal at present, and the DMD in the DLP technology.In order to show image frame, need the laser of green/indigo plant/red three kinds of primary colors.
CRT be a kind of be display with cathode-ray tube (CRT), its mainly by cloche, electron gun, deflection coil, stress form by panel.Traditional CRT technology is used in televisor, the computer screen application, and the CRT technology also can be used in the projection mechanical-optical setup in addition, but often efficient is not high, and receives brightness limit.
CRT also can pass through the electron-beam excitation LASER Light Source, and the beam bombardment laser panel that the electron gun of CRT is produced produces LASER Light Source, has decoherence, brightness advantages of higher.But the electron-beam excitation system that general light source is equipped with adopts the intersection electron gun; This electron gun ejected electron bundle is at electric current distribution type of the being Gaussian of image planes; There is defective from luminescence mechanism; The energy that is converted into heat is than great, and the light-emitting zone power consumption is also inhomogeneous, has reduced the mean lifetime of chip.
The utility model content
The purpose of the utility model is that the laser c RT optical projection system that provides a kind of laminar electron beam to adopt constant voltage to excite solves above technical matters.
The technical matters that the utility model solved can adopt following technical scheme to realize:
The laser c RT optical projection system that laminar electron beam adopts constant voltage to excite; Comprise light-source system, optical prism, projection optical system, it is characterized in that; Said light-source system comprises that three are used for lasing laser c RT; The LASER Light Source color that three said laser c RT produce is respectively a kind of in the three primary colors, and the laser that three said laser c RT produce forms a branch of three looks synthetic light through optical prism respectively;
Said laser c RT comprises a vacuum tube; One end of said vacuum tube is provided with a laser panel; The other end of said vacuum tube is provided with the said electron gun of electron gun and adopts a laminar flow electron gun; The place ahead of said laminar flow gun is provided with a focus deflection system, and the place ahead of said focus deflection system is provided with said laser panel;
Said laminar flow gun comprises a negative electrode, and said negative electrode loads negative voltage power supply, and said laser panel loads positive voltage source, said negative voltage power supply and the series connection of said positive voltage source, and junction ground connection.
Advantages such as the utility model is the light source of laser c RT light source as optical projection system, and having can eliminate laser speckle, controllability is good.And the electron gun of the utility model has adopted the laminar flow gun divergent bundle, and the current density of laser panel has more uniformly and to distribute, and average laser panel power consumption has reduced the energy that being converted into heat.
Said negative electrode loads 0～-the high negative voltage power supply of 20kv, said laser panel loads 0～+ the high positive voltage power supply of 20kv.High voltage through laser c RT in the utility model can be cut apart, and makes negative potential be applicable to negative electrode, and positive potential is applicable to anode, so the combined potential on the laser panel is near the electric potential difference of positive potential and negative potential.
Also comprise an electron beam current control system, said electron beam current control system connects said negative electrode.The electron beam current control system is the negative electrode and other electrodes that is used for controlling electron gun, produces required electron beam, and electron beam scans the back and produces required laser output intensity on the laser panel.The electron beam current control system is regulated and Control current through the control electron gun, and then the output intensity of control laser.
Do not need the fast modulation electron beam current at the utility model, produce electron beam current bombardment laser panel generation LASER Light Source, need not use expensive modulator electrode at the negative electrode place thereby only need load a constant voltage in the negative electrode section.Therefore the configuration of electron beam control system and electron gun is comparatively simplified with cheap.The electron beam current control system can be adjusted the voltage of Control current on negative electrode or other electrodes separately.The utility model is regulated the voltage of electrode in the electron gun through the electron beam current control system, can reach the constant output of requirement unit.
Said focus deflection system comprise one be arranged on said electron gun the place ahead focusing coil, be arranged on the deflection coil in said focusing coil the place ahead, the place ahead of said deflection coil is provided with said laser panel.In order to keep the laminarity of electron beam, the deflection angle of deflection coil must be very little, must be in the linear deflection area of deflection coil.
Said vacuum tube comprises a funnel shaped cloche, and the wide-angle side of said cloche is provided with said laser panel, and the other end of said cloche is provided with said laminar flow gun.The structural design of vacuum tube and laminar flow gun can change according to practical application.
Said laser panel comprises at least two laser cavitys, and at least two said laser cavitys are arranged in said laser panel along thickness direction; Said laser cavity comprises a gain media layer, reflection horizon, and said reflection horizon is separately positioned on the place ahead and the rear of said gain media layer.
Said laser cavity comprises partially reflecting layer and complete reflection horizon, and said partially reflecting layer is arranged on the place ahead of said gain media layer, and said complete reflection horizon is arranged on the rear of said gain media layer.So that photon repeatedly excites in laser cavity.
Also comprise a laser panel cooling system; Said laser panel cooling system comprises manifold, heat-exchange system, the liquid coolant that is arranged on said laser panel periphery; Said liquid coolant is arranged in the said manifold, and said heat-exchange system connects the entrance and exit of said manifold.Through whole laser panel periphery, the laser panel is cooled liquid coolant through manifold flow, and coolant temperature rises.The liquid coolant that heats up is left manifold from outlet, thereby gets into heat-exchange system, cools off with liquid coolant and circulates again.
Said liquid coolant adopts insulation, transparent liquid coolant.So that laser panel cooling system isolated high voltage, the setting of having saved other electric shielding systems.Said liquid coolant can adopt the medium liquid coolant, like the Fluorinert of 3M manufactured, also can adopt perfluor liquid or other non conducting fluids.
Said laser panel periphery can be provided with at least two manifolds, at least two mutual UNICOMs of said manifold, and at least one at least two said manifolds connects said heat-exchange system.So that cooling laser panel more effectively and uniformly.
Also comprise three photomodulators (SLM), said photomodulator is arranged on along said laser c RT on the light path between the said optical prism.
Said optical prism can adopt an X prism, and the laser of three said laser c RT generations forms three looks synthetic light through the look that closes of said X prism respectively.
Said photomodulator can adopt liquid crystal on silicon (LCOS).Said photomodulator also can adopt grating light valve (GLV) or digital micro-mirror (DMD).To reduce volume, cut down the consumption of energy.
Beneficial effect: owing to adopt technique scheme, the utility model combines the advantage of CRT and laser, need not expensive modulating equipment, just can export LASER Light Source, has advantages such as ability eliminate laser speckle, controllability are good.Electron gun has adopted the laminar flow gun divergent bundle, and the current density of laser panel has more uniformly and to distribute, and average laser panel power consumption has reduced the energy that being converted into heat.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of the utility model;
Fig. 2 is the structural representation of the utility model laser c RT.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand with effect and understand, below in conjunction with the further elaboration the utility model of concrete diagram.
With reference to Fig. 1, the laser c RT optical projection system that laminar electron beam adopts constant voltage to excite comprises light-source system, optical prism 2, projection optical system 3, and the place ahead of projection optical system 3 is provided with screen 5.Light-source system comprises that three are used for lasing laser c RT1, and the LASER Light Source color that three laser c RT1 produce is respectively a kind of in the three primary colors, and the laser that three laser c RT1 produce forms a branch of three looks synthetic light through optical prism 2 respectively.Advantages such as the utility model is the light source of laser c RT1 light source as optical projection system, and having can eliminate laser speckle, controllability is good.
With reference to Fig. 2, laser c RT1 comprises a vacuum tube, and vacuum tube comprises a funnel shaped cloche 11, and the wide-angle side of cloche 11 is provided with laser panel 12, and the other end of cloche 11 is provided with electron gun, and electron gun adopts a laminar flow electron gun 13.The structural design of vacuum tube and laminar flow gun 13 can change according to practical application.The place ahead of laminar flow gun 13 is provided with a focus deflection system, and the place ahead of focus deflection system is provided with laser panel 12.Laminar flow gun 13 comprises a negative electrode 131, and negative electrode 131 loads negative voltage power supply, and laser panel 12 loads positive voltage source, negative voltage power supply and positive voltage source series connection, and junction ground connection.Negative electrode 131 loads 0～-the high negative voltage power supply of 20kv, laser panel 12 loads 0～+ the high positive voltage power supply of 20kv.High voltage through laser c RT1 in the utility model can be cut apart, and makes negative potential be applicable to negative electrode 131, and positive potential is applicable to anode, so the combined potential on laser panel 12 is near the electric potential difference of positive potential and negative potential.The electron gun of the utility model has adopted laminar flow gun 13 divergent bundles, and the current density of laser panel 12 has more uniformly and to distribute, and average laser panel 12 power consumptions have reduced the energy that being converted into heat.
Also comprise an electron beam current control system 14, electron beam current control system 14 connects negative electrode 131.Electron beam current control system 14 is the negative electrodes 131 and other electrodes that are used for controlling electron gun, produces required electron beam, and electron beam scans the back and produces required laser output intensity on laser panel 12.Electron beam current control system 14 is regulated and Control current through the control electron gun, and then the output intensity of control laser.Do not need the fast modulation electron beam current at the utility model, generate LASER Light Source, need not use expensive modulator electrode at negative electrode 131 places thereby only need to load a constant voltage generation electron beam current bombardment laser panel 12 for 131 sections at negative electrode.Therefore the configuration of electron beam control system and electron gun is comparatively simplified with cheap.Electron beam current control system 14 can be adjusted the voltage of Control current on negative electrode 131 or other electrodes separately.The utility model is regulated the voltage of electrode in the electron gun through electron beam current control system 14, can reach the constant output of requirement unit.
Electron gun can also comprise a G1 electrode 132, a G2 electrode 133, a G3 electrode 134, and G1 electrode 132, G2 electrode 133, G3 electrode 134 are successively set between negative electrode 131 and the focus deflection system.G1 electrode 132, G2 electrode 133, G3 electrode 134 connect electron beam current control system 14 respectively, and electron beam current control system 14 each electrode of control are controlled the output intensity of laser.
The focus deflection system comprise one be arranged on electron gun the place ahead focusing coil 135, be arranged on the deflection coil 136 in focusing coil 135 the place aheads, the place ahead of deflection coil 136 is provided with laser panel 12.In order to keep the laminarity of electron beam, the deflection angle of deflection coil 136 must be very little, must be in the linear deflection area of deflection coil 136.
Also comprise a laser panel cooling system, laser panel cooling system comprises manifold, heat-exchange system, the liquid coolant that is arranged on laser panel 12 peripheries, and liquid coolant is arranged in the manifold, and heat-exchange system connects the entrance and exit of manifold.Through whole laser panel 12 peripheries, laser panel 12 is cooled liquid coolant through manifold flow, and coolant temperature rises.The liquid coolant that heats up is left manifold from outlet, thereby gets into heat-exchange system, cools off with liquid coolant and circulates again.Laser panel 12 peripheries can be provided with at least two manifolds, at least two mutual UNICOMs of manifold, and at least one at least two manifolds connects heat-exchange system.So that the cooling laser panel 12 more effectively and uniformly.Liquid coolant adopts insulation, transparent liquid coolant.So that laser panel cooling system isolated high voltage, the setting of having saved other electric shielding systems.Liquid coolant can adopt the medium liquid coolant, like the Fluorinert of 3M manufactured, also can adopt perfluor liquid or other non conducting fluids.
With reference to Fig. 1, also comprise three photomodulators 4, photomodulator 4 is arranged on along laser c RT1 to optical prism on the light path between 2.Photomodulator 4 can adopt liquid crystal on silicon (LCOS).Photomodulator 4 also can adopt grating light valve (GLV) or digital micro-mirror (DMD).To reduce volume, cut down the consumption of energy.Optical prism 2 can adopt an X prism, and the laser of three laser c RT1 generations forms three looks synthetic light through the look that closes of X prism respectively.
Embodiment one: with reference to Fig. 1, three laser c RT1 provide redness, green and blue laser light source respectively.After three laser c RT1 modulate through photomodulator 4 respectively, through the 2 coupling shapings of suitable X prism, project again on the screen 5 again, form full-color image through optical projection system 3.In order to reach the colour balance of preferred view image, each laser c RT1 can adjust through electron beam current control system 14 separately.This adjustment can be adopted manual completion, as lets the user control each laser c RT1 separately.Also can come feedback automatically, so that electron beam current control system 14 is regulated the colour balance of expectation automatically through inductor.
Embodiment two: with reference to Fig. 2, the negative voltage power supply of negative electrode 131 loading-20kv, the positive voltage source of laser panel loading+20kv makes that the electronics total voltage of bombarding laser panel 12 is 40kv.Between two voltage sources earthing device is arranged.Then:
1) negative electrode 131-20kv is connected near vacuum tube wall one side, negative electrode 131-the 20kv voltage source is defined as the voltage of electron gun section.
2) G1 electrode 132 is used for adjusting and Control current or output intensity.Because negative electrode 131 be-20kv, G1 electrode 132 can be modulated in-120v～0v scope.-120v is the cut-out voltage of vacuum tube, when being about to G1 electrode 132 modulation-120v, does not have electronics to launch.
3) and negative electrode 131, G1 electrode 132 be associated, G2 electrode 133 voltages are set to+1200v.
4) related with negative electrode 132, G3 electrode 134 is pre-focus electrodes, and voltage is about+5000v.
Therefore, electron gun end and negative electrode 131 will maintain-20kv, current density and number needs will be regulated through G1.
In addition, can be arbitrary value at the high voltage of electron gun end, the voltage on the electrode in the electron gun also can design as required.Can also the voltage on the laser panel be designed to-20kv, electron gun section voltage is+20kv.
With the optical projection system that laser c RT1 is the basis, can effectively be applied to grating light valve (GLV) projector and other Projection Display lamp apparatus.For example, laser c RT can dock application separately with SLM, also can use at other field, as be applied to optical fiber switch, optical fiber router, laser medical equipment etc.
More than show and described ultimate principle of the utility model and the advantage of principal character and the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the instructions that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (9)
1. laminar electron beam adopts the laser c RT optical projection system that constant voltage excites; Comprise light-source system, optical prism, projection optical system, it is characterized in that; Said light-source system comprises that three are used for lasing laser c RT; The LASER Light Source color that three said laser c RT produce is respectively a kind of in the three primary colors, and the laser that three said laser c RT produce forms a branch of three looks synthetic light through optical prism respectively;
Said laser c RT comprises a vacuum tube; One end of said vacuum tube is provided with a laser panel; The other end of said vacuum tube is provided with the said electron gun of electron gun and adopts a laminar flow electron gun; The place ahead of said laminar flow gun is provided with a focus deflection system, and the place ahead of said focus deflection system is provided with said laser panel;
Said laminar flow gun comprises a negative electrode, and said negative electrode loads negative voltage power supply, and said laser panel loads positive voltage source, said negative voltage power supply and the series connection of said positive voltage source, and junction ground connection.
2. the laser c RT optical projection system that laminar electron beam according to claim 1 adopts constant voltage to excite is characterized in that: said negative electrode loads 0～-the high negative voltage power supply of 20kv, said laser panel loads 0～+ the high positive voltage power supply of 20kv.
3. the laser c RT optical projection system that laminar electron beam according to claim 1 adopts constant voltage to excite, it is characterized in that: also comprise an electron beam current control system, said electron beam current control system connects said negative electrode.
4. the laser c RT optical projection system that laminar electron beam according to claim 3 adopts constant voltage to excite; It is characterized in that: said focus deflection system comprise one be arranged on said electron gun the place ahead focusing coil, be arranged on the deflection coil in said focusing coil the place ahead, the place ahead of said deflection coil is provided with said laser panel.
5. the laser c RT optical projection system that laminar electron beam according to claim 4 adopts constant voltage to excite; It is characterized in that: said vacuum tube comprises a funnel shaped cloche; The wide-angle side of said cloche is provided with said laser panel, and the other end of said cloche is provided with said laminar flow gun.
6. the laser c RT optical projection system that laminar electron beam according to claim 1 adopts constant voltage to excite, it is characterized in that: said laser panel comprises at least two laser cavitys, at least two said laser cavitys are arranged in said laser panel along thickness direction; Said laser cavity comprises a gain media layer, reflection horizon, and said reflection horizon is separately positioned on the place ahead and the rear of said gain media layer.
7. the laser c RT optical projection system that laminar electron beam according to claim 6 adopts constant voltage to excite; It is characterized in that: said laser cavity comprises partially reflecting layer and complete reflection horizon; Said partially reflecting layer is arranged on the place ahead of said gain media layer, and said complete reflection horizon is arranged on the rear of said gain media layer.
8. according to any laser c RT optical projection system that described laminar electron beam adopts constant voltage to excite in the claim 1 to 7; It is characterized in that: also comprise a laser panel cooling system; Said laser panel cooling system comprises manifold, heat-exchange system, the liquid coolant that is arranged on said laser panel periphery; Said liquid coolant is arranged in the said manifold, and said heat-exchange system connects the entrance and exit of said manifold.
9. the laser c RT optical projection system that laminar electron beam according to claim 8 adopts constant voltage to excite is characterized in that: also comprise three photomodulators, said photomodulator is arranged on along said laser c RT on the light path between the said optical prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204250830U CN202306118U (en) | 2011-10-31 | 2011-10-31 | Laser cathode ray tube (CRT) projection system capable of exciting laminar electron beam by constant voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204250830U CN202306118U (en) | 2011-10-31 | 2011-10-31 | Laser cathode ray tube (CRT) projection system capable of exciting laminar electron beam by constant voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202306118U true CN202306118U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204250830U Expired - Fee Related CN202306118U (en) | 2011-10-31 | 2011-10-31 | Laser cathode ray tube (CRT) projection system capable of exciting laminar electron beam by constant voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202306118U (en) |
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2011
- 2011-10-31 CN CN2011204250830U patent/CN202306118U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20151031 |
|
| EXPY | Termination of patent right or utility model |