CN1267964C - Carbon nano tube field emission light-emitting tube and its preparing method - Google Patents
Carbon nano tube field emission light-emitting tube and its preparing method Download PDFInfo
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- CN1267964C CN1267964C CN 03134561 CN03134561A CN1267964C CN 1267964 C CN1267964 C CN 1267964C CN 03134561 CN03134561 CN 03134561 CN 03134561 A CN03134561 A CN 03134561A CN 1267964 C CN1267964 C CN 1267964C
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Abstract
The present invention discloses a carbon nano tube field emission light-emitting tube and a preparing method thereof. A multiple colour tube or a full color tube which is sealed in one cavity body can be manufactured by means of the method. A carbon nano tube which is prepared on a wire or a metallic point serves as a cathode; a transparent conductive film which is prepared on the inner wall of a glass tube serves as an anode; the cathode is fixed with an elastic metallic hook, and a cathode lead wire is led at a fixing point. A conductive film of the anode is coated with phosphor powder films in required positions. The preparing process of the carbon nano tube field emission light-emitting tube comprises the preparation of the cathode, the preparation of the anode, the fixation of the elastic metallic hook and the wire leading of silver paste; at last, the anode and the cathode are installed in a cavity body of the glass tube, and the cavity body which is pumped to be vacuum is sealed. The present invention increases the light-emitting efficiency by using the superior emission characteristic of a carbon nano tube and the characteristic that the emission efficiency is high when the radius of the wire is small. Because the elastic metallic hook is used for fixing the wire, the heat expansion and cold contraction which is resulted from the temperature change in the working process can be well released so that the cathode and the anode are kept parallel. The stability of a light-emitting tube is increased, and the service life of the light-emitting tube is prolonged.
Description
Technical field
The invention belongs to luminous and the Display Technique field, relate to a kind of refrigeration emission luminous tube, particularly a kind of carbon nanotube field emission luminous tube and preparation method thereof.
Background technology
Field emission luminescent tube is a kind of luminescent device, its luminous wavelength is determined by fluorescent material, therefore can be by red, green, blue tri-color tube group is together by adding different voltage or the different panchromatic luminous tube of pulse shaping or the combination of a plurality of tri-color tube as the Large Screen and Full display panel, but also monochromatic tube is used separately.It is compared with general light-emitting diode and makes simply, and low in energy consumption, the brightness height, and the life-span is long.Can improve the brightness and the resolution of display, can be used for the indicator light demonstration of large scale display, indoor outer billboard, stop-light and electronic instrument automated system etc.
The carbon nanotube field emission luminous tube does not appear in the newspapers at present, general light-emitting diode (LED) device mostly is compound semiconductor P-N led lighting, it is luminous that its principle is that P-N exhausts the non equilibrium carrier radiation recombination, and what emission wavelength was decided by the P-N material can be with mechanism.Its manufacture craft and complex structure, luminosity is low.
Summary of the invention
At above-mentioned phenomenon or deficiency, the objective of the invention is to, a kind of carbon nanotube field emission luminous tube and preparation method thereof is provided, the complicated technology that the present invention has avoided compound semiconductor diode P-N knot to make, simple in structure, with low cost, and can improve emission effciency, reduce power consumption, prolong luminous tube useful life.
What realize above-mentioned carbon nanotube field emission luminous tube invention technology solution is: this carbon nanotube field emission luminous tube comprises a glass chamber; It is characterized in that preparation has the anode that nesa coating constitutes on the inwall of glass chamber; At least be provided with an one metal wire or at least one spot welding in the glass chamber and be fixed in metal tip on the binding post, the carbon nano-tube for preparing on wire or metal tip constitutes negative electrode, when negative electrode is the carbon nano-tube of wire preparation, tighten fixingly by the elastic metallic hook at two ends by being fixed on the glass cavity wall, draw cathode leg in bearing; Go back the coating fluorescent powder film on the corresponding anode conducting film, the metal tip on the binding post, all the coating fluorescent powder film of corresponding a kind of color are fixed in an one metal wire or spot welding; The glass chamber that anode and negative electrode will be housed at last vacuumizes encapsulation.
Carbon nanotube field emission luminous tube of the present invention can be prepared into monochromatic tube, also can be prepared into the polychrome pipe, the negative electrode of polychrome carbon nanotube field emission luminous tube can be made of the carbon nano-tube for preparing on several one metal wires or the metal tip, can be coated with varicolored fluorescent material in corresponding zones of different, to increase display resolution.
Carbon nanotube field emission luminous tube of the present invention can be enclosed the wire negative electrode that three preparations have carbon nano-tube in a glass evacuated cavity, the anode coating is red, green, blue three-color phosphor, can a shared anode, also can be independent separately, three negative electrodes are independent, and such field emitting luminous tube can be by adding different voltage or different panchromatic pixels points of pulse shaping;
Described wire can be tungsten filament, iron wire, molybdenum filament, nickel wire etc., and wire is fixed with the elastic metallic hook; Both can discharge expanding with heat and contract with cold that variations in temperature causes in the course of work, make the anode and cathode keeping parallelism again.
Described elastic metallic hook is made by elastic metallic, fall on the position at conducting film two ends with the photoetching in glass chamber of low glass powder sintering or point be welded in the good binding post of glass plate sealing-in on.
The shape of glass chamber can be dull and stereotyped also can be circular.
Realize the preparation method of above-mentioned carbon nanotube field emission luminous tube, be characterized in: may further comprise the steps:
1) negative electrode preparation
The metal tip on the binding post is fixed in clean metal silk or spot welding, prepares carbon nano-tube as negative electrode on wire or metal tip with pyrolysismethod or chemical vapour deposition technique or coating process technology;
2) anode preparation
On glass plate or inside pipe wall prepare nesa coating, according to the lead-in wire and the assembling needs get rid of the not part of needs nesa coating, coating fluorescent powder film on desired location;
3) be fixed in metal tip on the binding post, all the coating fluorescent powder film of corresponding a kind of color in an one metal wire or spot welding;
4) at least one negative electrode is fixed on the glass cavity wall, when negative electrode is the carbon nano-tube of wire preparation, preparation metallic elastic hook, and be fixed in corresponding position, in order to tighten the fixing metal silk, make the anode and cathode keeping parallelism,
5) draw cathode leg in bearing; The cavity of anode and negative electrode will be housed at last, vacuumize encapsulation.
The present invention compares with prior art, has following characteristics:
(1) the present invention makes up dexterously and utilizes good field emission characteristic of carbon nano-tube and very little wire (as tungsten filament) or the metal tip of radius of curvature, wire in addition on the wire point preparation good transmission characteristics carbon nano-tube, improved luminous efficiency greatly.
(2) can discharge expanding with heat and contract with cold that variations in temperature causes in the course of work well with elastic metallic hook fixing metal silk, make the anode and cathode keeping parallelism, thereby increase the stability and the useful life of luminous tube.
(3) the wire negative electrode of inside back cover root growth carbon nano-tube in glass chamber, the anode coating is red, green, blue three-color phosphor, such luminous tube can be by adding the combination of different voltage or different panchromatic pixels point of pulse shaping or a plurality of tri-color tube as the Large Screen and Full display panel, the negative electrode of polychrome carbon nanotube field emission luminous tube can be wire or the metal tip that several preparations have carbon nano-tube, can be coated with varicolored fluorescent material in corresponding zones of different, improve the brightness and the resolution of display.
Description of drawings
Fig. 1 is that the structure chart of carbon nanotube field emission luminous tube of the present invention also is the sectional view of embodiment 1;
Fig. 2 is sectional view (a) and the vertical view (b) of carbon nanotube field emission luminous tube embodiment 2 of the present invention.
Embodiment
Below in conjunction with the embodiment that accompanying drawing and inventor finish according to technique scheme, the present invention is described in further detail.
Referring to Fig. 1,2, carbon nanotube field emission luminous tube of the present invention comprises a glass chamber 4, and preparation has nesa coating 5 to constitute anode on glass chamber 4 inwalls; At least be provided with an one metal wire 3 or at least one spot welding in the glass chamber 4 and be fixed in metal tip on the binding post, preparation carbon nano-tube 2 constitutes negative electrode on wire 3 or metal tip, when negative electrode is the carbon nano-tube of wire preparation, tighten fixingly by the elastic metallic hook 1 at two ends by being fixed on glass chamber 4 inwalls, drawing cathode leg simultaneously with low glass powder sintering elastic metallic hook 1 place; On corresponding anode conducting film 5, also be coated with fluorescent powder membrane 6, the cavity of anode and negative electrode will be housed at last, vacuumize encapsulation.
Luminous tube negative electrode of the present invention is a carbon nano-tube, and with made of carbon nanotubes on wire, wire is tightened fixing by the elastic metallic hook, the elastic metallic hook be fixed on get rid of in the glass chamber nesa coating by the position at two ends, the silver ink firing slurry draws cathode leg; Anode is made in the electrically conducting transparent film preparation on glass chamber, remove the not part of needs conducting film, coating fluorescent powder on desired location according to lead-in wire and assembling needs.
The present invention is undertaken by following preparation method:
(1) negative electrode preparation: on metal tip on the binding post is fixed in wire or spot welding, prepare carbon nano-tube, take out the back to its purifying.
The carbon nano-tube available heat solution of using in the method, CVD method, coating process etc. obtain.
(2) anode preparation: prepare nesa coating at the glass chamber inwall, remove the not part of needs conducting film, coating fluorescent powder on desired location according to lead-in wire and assembling needs.
(3) preparation metallic elastic hook falls the position by two ends of conducting film with it with the photoetching in glass chamber of low glass powder sintering.Or with metallic elastic hook point be welded in the good binding post of glass plate sealing-in on.
(4) cavity of anode and negative electrode will be housed at last, and vacuumize encapsulation and form.
Carbon nanotube field emission luminous tube operation principle of the present invention is: with the minus earth of field emission luminescent tube, anode adds positive voltage, when voltage is added to certain numerical value, the most advanced and sophisticated electric field of emitter is enough strong, emitter tip end surface potential barrier step-down is narrowed down, just have the electron tunneling surface potential barrier to emit, it is luminous to be quickened to get on the fluorescent material excitated fluorescent powder by electric field.So improve the key of field emission efficient is the very little emitter tip of preparation radius of curvature, the present invention's combination utilizes good field emission characteristic of carbon nano-tube and very little wire (as tungsten filament) or the metal tip of radius of curvature, on wire or metal tip, prepare carbon nano-tube, improved luminous efficiency greatly; Fix wire with the elastic metallic hook in addition and can discharge well that variations in temperature causes wiry expanding with heat and contract with cold in the course of work, make the anode and cathode keeping parallelism, thereby increased the stability and the useful life of luminous tube.
Carbon nanotube field emission luminous tube brightness height of the present invention, the light wave of its emission determine by fluorescent material, therefore can be by red, green, blue tri-color tube group together or the combination of a plurality of tri-color tube as the Large Screen and Full display panel.It compares low in energy consumption with at present used various display pixels and general light-emitting diode, the brightness height, and the life-span is long and cost of manufacture is low.
Below be the embodiment that the inventor provides, but the invention is not restricted to this embodiment.
Embodiment 1: with the monochromatic circular luminous tube of molybdenum elastic hook fixed tungsten structure wiry
Its structure is with above-mentioned technical scheme.Its preparation method is:
(1) negative electrode preparation: clean tungsten filament, on tungsten filament,, take out the back to its purifying with pyrolysismethod, the growth of CVD method or coating carbon nano-tube.
(2) anode preparation: with benzene dilution (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn, wherein Sn/In prepares in 10% ratio, clean glass tube then after an end block, with (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn is poured glass tube into makes glass tube inwall dipping after several minutes, pour out mixed liquor, after the heat treatment, slowly dry then, can form the ITO conducting film (or using other prepared) of even hard, clear, according to after lead-in wire and the assembling needs photoetching on ITO coating fluorescent powder.Certainly, the mixed liquor used of preparation ITO film can be used SnCl
4+ H
2O+InO
2Solution.
(3) preparation molybdenum elastic hook falls the position by two ends of ITO with it with the photoetching in glass tube of low glass powder sintering.The silver ink firing slurry draws negative electrode simultaneously; Sinter fixedly tungsten filament of back.
This method had both discharged expanding with heat and contract with cold that variations in temperature causes in the tungsten filament course of work, and can make the anode and cathode keeping parallelism again, thereby had increased the stability and the useful life of luminous tube.
(4) cavity of anode and negative electrode will be housed at last, and vacuumize encapsulation and form.
Embodiment 2: with the plate luminous tube of molybdenum elastic hook fixed tungsten structure three looks wiry
(1) negative electrode preparation: clean several tungsten filaments, on tungsten filament,, take out the back to its purifying with pyrolysismethod, the growth of CVD method or coating carbon nano-tube.
(2) anode preparation: with benzene dilution (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn, wherein Sn/In prepares in 10% ratio, cleans plate glass then, with (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn is poured on and makes the glass plate dipping after several minutes on the glass plate, outwell mixed liquor, then after the heat treatment, slowly dry, can form the ITO conducting film (or using other prepared) of even hard, clear, size according to device is tailored, according to applying red, green, blue three fluorescent powder membranes respectively after lead-in wire and the photoetching of assembling needs on ITO.Certainly, the mixed liquor used of preparation ITO conducting film can be used SnCl
4+ H
2O+InO
2Solution.
(3) six molybdenum elastic hooks of preparation, with its with the photoetching on glass plate of low glass powder sintering fall ITO by the position at two ends, silver ink firing is starched and is drawn negative electrode simultaneously; Fix three tungsten filaments after sintering.
(4) anode and negative electrode glass will be housed at last and stay the capsule of aspirating hole to sinter cavity into, and vacuumize encapsulation and form with low glass powder with special-purpose.
Embodiment 3: the cylindrical structural three-colour light-emitting pipe of binding post spot welding fixed tungsten metal tip
(1) negative electrode preparation: clean several tungsten filament points, on tungsten filament,, take out the back to its purifying with pyrolysismethod, the growth of CVD method or coating carbon nano-tube.
(2) anode preparation: with benzene dilution (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn, wherein Sn/In prepares in 10% ratio, cleans the short glass tube of an end closure then, with (C
7H
15COO)
3In and C
7H
15COO)
3The mixed liquor of Sn is poured into and is flooded after several minutes in the glass tube, outwell mixed liquor, then after the heat treatment, slowly dry, can form the ITO conducting film (or using other prepared) of even hard, clear, according on ITO, applying red, green, blue three-color phosphor film respectively after lead-in wire and the photoetching of assembling needs.Certainly, the mixed liquor used of preparation ITO conducting film can be used SnCl
4+ H
2O+InO
2Solution.
(3) internal diameter according to above-mentioned glass tube prepares glass plate, draws three negative electrodes fixing tungsten filament point of spot welding on it by glass plate, stays aspirating hole then.
(4) glass plate of negative electrode and the glass tube of preparation ito anode will be housed at last and sinter cavity into, vacuumize encapsulation, vacuumize the similar bulb envelope of packaging technology with low glass powder.
Certainly, can exemplify manyly by the embodiment of above-mentioned disclosed technical scheme, not exemplify here, so long as, can both realize the present invention in interest field of the presently claimed invention do limit.
Claims (6)
1. a carbon nanotube field emission luminous tube comprises a glass chamber (4); It is characterized in that preparation has the anode that nesa coating (5) constitutes on the inwall of glass chamber (4); At least be provided with an one metal wire (3) or at least one spot welding in the glass chamber (4) and be fixed in metal tip on the binding post, the carbon nano-tube (2) for preparing on wire (3) or metal tip constitutes negative electrode, when negative electrode is the carbon nano-tube (2) of wire (3) preparation, tighten fixingly by the elastic metallic hook (1) at two ends by being fixed on the inwall of glass chamber (4), draw cathode leg in bearing; Go back coating fluorescent powder film (6) on the corresponding anode conducting film (5), the metal tip on the binding post, all the coating fluorescent powder film (6) of corresponding a kind of color are fixed in an one metal wire (3) or spot welding; The glass chamber that anode and negative electrode will be housed at last vacuumizes encapsulation.
2. carbon nanotube field emission luminous tube as claimed in claim 1 is characterized in that, has several preparations that the negative electrode of carbon nano-tube (2) is arranged in the described glass chamber (4), is coated with varicolored fluorescent material (6) in corresponding zones of different; Promptly can be made into multicolor luminous pipe.
3. carbon nanotube field emission luminous tube as claimed in claim 1, it is characterized in that, enclose the wire (3) of three root growth carbon nano-tube (2) in the described glass evacuated cavity (4) as negative electrode, apply red, green, blue three-color phosphor (6) respectively on the anode that nesa coating (5) constitutes, three negative electrodes can a shared anode, perhaps make three negative electrodes independent separately, constitute the field emitting luminous tube of a panchromatic pixels point.
4. carbon nanotube field emission luminous tube as claimed in claim 1 is characterized in that, described wire (3) is wherein a kind of of tungsten filament, iron wire, molybdenum filament, nickel wire, tightens fixingly with elastic metallic hook (1), makes it parallel with anode.
5. carbon nanotube field emission luminous tube as claimed in claim 1, it is characterized in that, described elastic metallic hook (1) is made for elastic metallic, fall on the position at conducting film (5) two ends with the photoetching in glass tube (4) of low glass powder sintering or point be welded in the good binding post of glass plate sealing-in on.
6. a preparation method who realizes the described carbon nanotube field emission luminous tube of claim 1 is characterized in that, may further comprise the steps:
1) negative electrode preparation
The metal tip on the binding post is fixed in clean metal silk or spot welding, prepares carbon nano-tube as negative electrode on wire or metal tip with pyrolysismethod or chemical vapour deposition technique or coating process technology;
2) anode preparation
On glass plate or inside pipe wall prepare nesa coating, according to the lead-in wire and the assembling needs get rid of the not part of needs nesa coating, coating fluorescent powder film on desired location;
3) be fixed in metal tip on the binding post, all the coating fluorescent powder film of corresponding a kind of color in an one metal wire or spot welding;
4) at least one negative electrode is fixed on the glass cavity wall, when negative electrode is the carbon nano-tube of wire preparation, preparation metallic elastic hook, and be fixed in corresponding position, in order to tighten the fixing metal silk, make the anode and cathode keeping parallelism,
5) draw cathode leg in bearing; The cavity of anode and negative electrode will be housed at last, vacuumize encapsulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134561 CN1267964C (en) | 2003-09-10 | 2003-09-10 | Carbon nano tube field emission light-emitting tube and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134561 CN1267964C (en) | 2003-09-10 | 2003-09-10 | Carbon nano tube field emission light-emitting tube and its preparing method |
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| CN1492469A CN1492469A (en) | 2004-04-28 |
| CN1267964C true CN1267964C (en) | 2006-08-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192493B (en) * | 2006-11-22 | 2011-02-02 | 鸿富锦精密工业（深圳）有限公司 | Anode device and its producing method |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395634C (en) * | 2004-08-07 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN100370571C (en) * | 2004-11-12 | 2008-02-20 | 清华大学 | Field emission cathode and field emission apparatus |
| CN101097829B (en) * | 2006-06-30 | 2010-05-26 | 清华大学 | Diarch field emission pixel tube |
| CN101190786B (en) * | 2006-11-22 | 2012-06-06 | 财团法人工业技术研究院 | Nano metal particle and its nano carbon tube and its luminous element preparation method |
| CN101308889B (en) * | 2007-05-16 | 2010-08-18 | 中国科学院半导体研究所 | Method for enhancing light-emitting efficiency of semiconductor type carbon nano-tube |
| CN101441969B (en) * | 2007-11-23 | 2010-07-28 | 清华大学 | Field emission pixel tube |
| CN101943850B (en) * | 2009-07-03 | 2013-04-24 | 清华大学 | Sound-producing screen and projection system using same |
| CN104701123A (en) * | 2015-03-24 | 2015-06-10 | 中国计量学院 | Cold-cathode kaufman ion source device for carbon nano tube |
| CN112242279B (en) * | 2019-07-16 | 2022-03-18 | 清华大学 | Carbon nanotube field emitter and preparation method thereof |
-
2003
- 2003-09-10 CN CN 03134561 patent/CN1267964C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192493B (en) * | 2006-11-22 | 2011-02-02 | 鸿富锦精密工业（深圳）有限公司 | Anode device and its producing method |
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| CN1492469A (en) | 2004-04-28 |
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