CN101894729B - Method and device for emitting white light by field emission - Google Patents
Method and device for emitting white light by field emission Download PDFInfo
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- CN101894729B CN101894729B CN2009101073494A CN200910107349A CN101894729B CN 101894729 B CN101894729 B CN 101894729B CN 2009101073494 A CN2009101073494 A CN 2009101073494A CN 200910107349 A CN200910107349 A CN 200910107349A CN 101894729 B CN101894729 B CN 101894729B
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- 238000000695 excitation spectrum Methods 0.000 claims abstract description 4
- 238000004020 luminiscence type Methods 0.000 claims description 132
- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- 229910052733 gallium Inorganic materials 0.000 claims description 20
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 11
- 239000012190 activator Substances 0.000 claims description 11
- 238000001228 spectrum Methods 0.000 claims description 11
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- 229910052765 Lutetium Inorganic materials 0.000 claims description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 10
- 239000002223 garnet Substances 0.000 claims description 9
- 150000002910 rare earth metals Chemical class 0.000 claims description 9
- 238000000295 emission spectrum Methods 0.000 claims description 8
- 229910052771 Terbium Inorganic materials 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 229910052706 scandium Inorganic materials 0.000 claims description 5
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- 230000004913 activation Effects 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 8
- 229910052684 Cerium Inorganic materials 0.000 description 7
- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 description 7
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- 230000032683 aging Effects 0.000 description 4
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Abstract
The invention discloses a method and a device for emitting white light by field emission. The method comprises the following steps: a cathode ray activates a mixture of a blue cathode ray light emitting material and a yellow cathode ray light emitting material to emit blue and yellow lights; the generated blue light in the effective area of a photoluminescence excitation spectrum of the yellow cathode ray light emitting material further activates the yellow cathode ray light emitting material to emit the yellow light; and the blue light and the yellow light generated by twice activation are combined to generate the white light. The device comprises a cathode plate assembly, an anode plate assembly and a support body, wherein the anode plate assembly and the cathode plate assembly are arranged opposite to each other at internal, and the support body connects the cathode plate assembly with the anode plate assembly. The anode plate assembly comprises a transparent substrate, wherein a transparent anode and a light emitting material layer are arranged in sequence on the lateral side of the transparent substrate opposite to the anode plate assembly, and the transparent anode is adhered to the transparent substrate. The method and the device for emitting white light by field emission have long service lives and are not prone to obvious color coordinate deflection and light source efficiency reduction.
Description
Technical field
The invention belongs to the microelectronics technical field, relate to a kind of method and device thereof of transmitting white, relate in particular to a kind of method and device thereof of the emitting white light by field emission based on feds.
Background technology
In practical light source field, the light source that comparatively generally uses at present is: incandescent lamp, fluorescent lamp and light-emitting diode (LED, light emitting diode).But the incandescent lamp luminous efficiency is lower; The fluorescent tube luminous efficiency is high, but contains human body and the harmful mercury of environment, contaminated environment; The LED volume is little, reaction speed is fast, energy-conserving and environment-protective, but on the high side, the great power LED luminous efficiency is lower.
Field emission light source device has demonstrated another approach that obtains green eco-lighting.Compare with traditional fluorescent tube, field emission light source has avoided again the environmental pollution of fluorescent tube, pulse color break-up to cause the shortcomings such as people's visual fatigue when keeping the energy-efficient advantage of fluorescent tube, is a kind of green energy conservation lighting source.Compare with LED, field emission light source has more advantage aspect high-power, large area lighting, become the strong competitor of LED aspect high power light source.
Current, field transmitting white light source mainly is to utilize cathode-ray exciting red, green, blue (R, G, B) three-color phosphor to come compound generation white light, such light source component has the high advantage of color rendering index, but, the light source component that this kind material forms is difficult to satisfy the requirement that three kinds of fluorescent material of red, green, blue have higher cathode-ray luminescence performance simultaneously, therefore wherein the cathode-ray luminescence efficient of any fluorescent material not Gao Junhui cause the whole efficiency of light source not high.And the system that is comprised of the red, green, blue luminescent material has different aging characteristics owing to different materials, and the obviously phenomenon of skew occurs the chromaticity coordinates that occurs white light after the cathode-ray Long-Duration Exposure.
Summary of the invention
The technical problem to be solved in the present invention is, in the luminescent method for prior art, the problems such as the field transmitting white light source light-emitting efficiency that is made of red, green, blue (R, G, B) three-color phosphor is not high, chromaticity coordinates is offset easily, easily wear out provide a kind of method aging, that be not prone to the emitting white light by field emission that chromaticity coordinates obviously is offset, source efficiency is high that is difficult for.
The technical problem that the present invention also will solve is, in prior-art devices, to obtain white light by red, green, blue (R, G, the B) three-color phosphor that cathode-ray exciting mixes according to a certain percentage, because different fluorescent material aging characteristics are different, the defective of obviously skew and source efficiency decline occurs in the chromaticity coordinates that will occur white light after the three-color phosphor Long-Duration Exposure, and the device that a kind of service time is long, be not prone to the emitting white light by field emission that chromaticity coordinates obviously is offset, source efficiency descends is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method of emitting white light by field emission, comprise: the mixture of cathode-ray exciting excitated blue cathode-ray luminescence material and yellow cathode-ray luminescence material, send blue light and gold-tinted, blue light in the effective coverage of the photoluminescence excitation that is in yellow cathode-ray luminescence material that produces excites yellow cathode-ray luminescence material to send gold-tinted again, blue light and excite the gold-tinted composition generation white light of generation for twice.
In the method for emitting white light by field emission, the mass ratio of described blue cathode-ray luminescence material and yellow cathode-ray luminescence material is 0.5～10: 1.
In the method for emitting white light by field emission, described blue cathode-ray luminescence material is preferably the emission spectrum crest at the blue emitting material of 420～490nm.
In the method for emitting white light by field emission, described blue cathode-ray luminescence material most preferably is Y
2SiO
5: Ce, SrGa
2S
4: Ce, Sr
2CeO
4, a kind of among ZnS:Ag, ZnS:Tm, ZnS:Zn, the AlN:Eu;
Or La
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1;
Or partially or completely replaced the La of La by Y, Gd, Lu, Sc
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1.
In the method for emitting white light by field emission, described yellow cathode-ray luminescence material is preferably the Yellow luminous material of excitation spectrum in 420～490nm.
In the method for emitting white light by field emission, described yellow cathode-ray luminescence material most preferably is the rare-earth garnet system fluorescent material take Ce as activator.
In the method for emitting white light by field emission, described rare-earth garnet system fluorescent material take Ce as activator is preferably RE
3(Al, Ga)
5O
12: Ce, RE are at least a among Y, Tb, Gd, Lu, the La.
Wherein, Y
2SiO
5: Ce refers to the Y take Ce as activator
2SiO
5Luminescent material, all the other SrGa
2S
4: the implication of Ce, ZnS:Ag, ZnS:Tm, ZnS:Zn, AlN:Eu is identical therewith, La
(1-x)Ga
(1-y)Al
yO
3: xTm refers to the La take Tm as activator
(1-x)Ga
(1-y)Al
yO
3Luminescent material.
A kind of device of emitting white light by field emission, the positive plate assembly that comprises the minus plate assembly, arranges with minus plate assembly relative spacing, with the two supporter that is sealed connected together, described positive plate assembly comprises transparency carrier, be provided with successively transparent anode, luminous material layer in the transparency carrier side relative with the minus plate assembly, transparent anode is fitted on the transparency carrier, and described luminous material layer contains the mixture of blue cathode-ray luminescence material and yellow cathode-ray luminescence material.
In the light-emitting device, described yellow cathode-ray luminescence material is the rare-earth garnet system fluorescent material take Ce as activator.
In the light-emitting device, described rare-earth garnet system fluorescent material take Ce as activator is RE
3(Al, Ga)
5O
12: Ce, RE are at least a among Y, Tb, Gd, Lu, the La.
In the light-emitting device, described blue cathode-ray luminescence material is to produce the spectrum crest at the blue emitting material of 420～490nm under cathode-ray exciting.
In the light-emitting device, described blue cathode-ray luminescence material is Y
2SiO
5: Ce, SrGa
2S
4: Ce, Sr
2CeO
4, a kind of among ZnS:Ag, ZnS:Tm, ZnS:Zn, the AlN:Eu;
Or La
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1;
Or partially or completely replaced the La of La by Y, Gd, Lu, Sc
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1.
The present invention adopts the mixture of cathode-ray exciting excitated blue cathode-ray luminescence material and yellow cathode-ray luminescence material, produce blue light and gold-tinted, the blue light that is in the effective coverage of photoluminescence excitation of yellow cathode-ray luminescence material further excites yellow cathode-ray luminescence material to launch gold-tinted again, blue light and excite the compound rear formation white light of gold-tinted of generation for twice.The present invention has used the luminescent material of less kind, the just combination of blue cathode-ray luminescence material and yellow cathode-ray luminescence material, the whole aging characteristics of device depend on the ageing property of these two kinds of materials substantially, therefore, as long as select two kinds of better luminescent materials of stability just can effectively reduce the problem of aging of light source device, and because the penetration depth of cathode-ray is limited, can not by cathode-ray exciting to yellow cathode-ray luminescence material can further be excited by the blue light that blue cathode-ray luminescence material sends, improved luminous efficiency.
Wherein, the luminescent spectrum crest of blue cathode-ray luminescence material is positioned at 420～490nm, has better cathode-ray luminescence performance; The photoexcitation spectrum of yellow cathode-ray luminescence material is in 420～490nm, the cathode-ray luminescence peak of blue cathode-ray luminescence material just is in the effective coverage of yellow cathode-ray luminescence material photoluminescence excitation, has realized the part light conversion of blue light to gold-tinted.
In the device of emitting white light by field emission, be provided with successively transparent anode in the transparency carrier side relative with the minus plate assembly, luminous material layer, transparent anode is fitted on the transparency carrier, and the surface of transparent anode is provided with the luminous material layer of blue cathode-ray luminescence material and the mixing of yellow cathode-ray luminescence material, this luminescent layer is under cathode-ray exciting, blue cathode-ray luminescence material sends blue light, because it is far greater than the penetration depth of cathode-ray in yellow cathode-ray luminescence material that the penetration depth of blue light in yellow cathode-ray luminescence material wanted, therefore, can not by cathode-ray exciting to yellow cathode-ray luminescence material also can be excited by blue light and luminous.So, the blue light that yellow cathode-ray luminescence material can also be issued when being sent gold-tinted by cathode-ray exciting efficiently excites and sends gold-tinted, improved the luminous power of yellow cathode-ray luminescence material, the gold-tinted that luminous material layer sends and remaining blue light and then be compounded to form white light have improved the luminous efficiency of integral device.
Wherein, blue cathode-ray luminescence material is selected can launch the luminescent spectrum crest at the blue emitting material of 420～490nm light, for example: Y
2SiO
5: Ce, SrGa
2S
4: Ce, Sr
2CeO
4, ZnS:Ag, ZnS:Tm, ZnS:Zn, AlN:Eu, La
(1-x)Ga
(1-y)Al
yO
3: xTm (wherein Y in addition, can be used in 0＜x≤0.1,0≤y≤1, and Gd, Lu, Sc partially or completely replace La) etc., this class material has preferably luminescent properties under cathode-ray exciting.
Yellow cathode-ray luminescence material will satisfy its excitation spectrum in 420～490nm scope, and the blue light that can be issued efficiently excites.Ce is that the rare-earth garnet system fluorescent material of activator is proper yellow cathode-ray luminescence material, satisfies chemical formula RE
3(Al, Ga)
5O
12: Ce, rare earth elements RE can be from Y, Tb, Gd, Lu selects among the La, especially as RE=Y or Tb, the corresponding YAG:Ce of difference and TAG:Ce.
Above-mentioned blue cathode-ray luminescence material is mixed according to a certain percentage with yellow cathode-ray luminescence material, be coated on the transparent anode by silk screen printing or spin coating mode, under cathode-ray exciting and can send white light, by adjusting the ratio of two kinds of cathode-ray luminescence materials, just can obtain the white light of different chromaticity coordinatess.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the cathode-ray luminescence spectrum of embodiment 1;
Fig. 2 is the cathode-ray luminescence spectrum of embodiment 2;
Fig. 3 is the cathode-ray luminescence spectrum of embodiment 3;
Fig. 4 is the cathode-ray luminescence spectrum of embodiment 4;
Fig. 5 is the cathode-ray luminescence spectrum of embodiment 5;
Fig. 6 is the cathode-ray luminescence spectrum of embodiment 6;
Fig. 7 is emitting white light by field emission light supply apparatus schematic diagram among the present invention;
The test condition that the cathode-ray luminescence spectrogram adopts is: excitation voltage 5kV, 8 microamperes of lines.
Embodiment
By following examples and accompanying drawing the present invention is described in further detail:
Raw material among the embodiment has the commercial goods, can directly be used.
Embodiment 1: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.99GaO
3: the mixture of 0.01Tm and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 5: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 1, and the spectrum crest is about the 535nm of about blue region 460nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 2: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.99GaO
3: the mixture of 0.01Tm and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 4: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 2, and the spectrum crest is about the 535nm of about blue region 460nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 3: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.99GaO
3: the mixture of 0.01Tm and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 3: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 3, and the spectrum crest is about the 535nm of about blue region 460nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 4: a kind of method of emitting white light by field emission, the mixture of cathode-ray exciting blue cathode-ray luminescence material ZnS:Ag and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 1: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 4, and the spectrum crest is about the 535nm of about blue region 450nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 5: a kind of method of emitting white light by field emission, the mixture of cathode-ray exciting blue cathode-ray luminescence material ZnS:Ag and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 1.2: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 5, and the spectrum crest is about the 535nm of about blue region 450nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 6: a kind of method of emitting white light by field emission, the mixture of cathode-ray exciting blue cathode-ray luminescence material ZnS:Ag and yellow cathode-ray luminescence material YAG:Ce, both mass ratioes are 0.5: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.Its emission spectrum is seen Fig. 6, and the spectrum crest is about the 535nm of about blue region 450nm and gold-tinted zone, and both are compound can to realize producing white light.
Embodiment 7: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material Y
2SiO
5: Ce and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 9.8: 1, send blue light and gold-tinted, the blue light that produces further excites yellow cathode-ray luminescence material to send gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 8: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material ZnS:Tm and yellow cathode-ray luminescence material Lu
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 10: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 9: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material ZnS:Zn and yellow cathode-ray luminescence material La
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 2: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 10: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.9Ga
0.5Al
0.5O
3: 0.1Tm and yellow cathode-ray luminescence material Lu
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 10: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 11: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.98AlO
3: 0.02Tm and yellow cathode-ray luminescence material La
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 6.5: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 12: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.95Ga
0.7Al
0.3O
3: 0.05Tm and yellow cathode-ray luminescence material Y
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 8.4: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 13: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.92GaO
3: 0.08Tm and yellow cathode-ray luminescence material Tb
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 7.6: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 14: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material Y
0.93Ga
0.4Al
0.6O
3: 0.07Tm and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 9.1: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 15: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.71Gd
0.25Ga
0.4Al
0.6O
3: 0.04Tm and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 6.8: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 16: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material La
0.12Lu
0.83Ga
0.7Al
0.3O
3: 0.05Tm and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 5.3: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 17: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material Sc
0.94Ga
0.8Al
0.2O
3: 0.06Tm and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 4.5: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 18: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material AlN:Eu and yellow cathode-ray luminescence material Gd
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 2.5: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 19: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material SrGa
2S
4: Ce and yellow cathode-ray luminescence material Tb
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 2.5: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 20: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material Sr
2CeO
4With yellow cathode-ray luminescence material Y
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 4.8: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 21: a kind of method of emitting white light by field emission, cathode-ray exciting blue cathode-ray luminescence material Y
0.9Ga
0.4Al
0.6O
3: 0.1Tm and yellow cathode-ray luminescence material Tb
3(Al, Ga)
5O
12: the mixture of Ce, both mass ratioes are 2.5: 1, send blue light and gold-tinted, the blue-light excited not luminous yellow cathode-ray luminescence material that produces further sends gold-tinted, blue light and excite the gold-tinted composition generation white light of generation for twice.
Embodiment 22, as shown in Figure 7, a kind of light-emitting device that produces white light, the positive plate assembly 102 that comprises minus plate assembly 101, arranges with minus plate assembly 101 relative spacings, with the two supporter that is sealed connected together 6, minus plate assembly, positive plate assembly, supporter 6 consist of a vacuum space, wherein minus plate assembly 101 comprises minus plate 1, and a plurality of electron emitter 2 well-regulated arrangements are formed on the minus plate 1; Described positive plate assembly 102 comprises transparency carrier 5, transparency carrier 5 is glass substrate, be provided with successively transparent anode 4 in transparency carrier 5 sides relative with minus plate assembly 101, luminous material layer 3, transparent anode 4 directly is fitted on the transparency carrier 5, transparent anode 4 is the raw materials as leading take tin indium oxide ITO or zinc oxide ZnO, adopt magnetron sputtering or vacuum evaporation mode to be coated in to form on the transparency carrier 5, luminous material layer 3 is that blue cathode-ray luminescence material is mixed according to a certain percentage with yellow cathode-ray luminescence material, is coated in by silk screen printing or spin coating mode that the surface of transparent anode 4 forms.
Blue cathode-ray luminescence material can be selected La
0.99GaO
3: 0.01Tm, Y
2SiO
5: Ce, SrGa
2S
4: Ce, ZnS:Ag, ZnS:Tm, ZnS:Zn, AlN:Eu; La
0.99Ga
0.5Al
0.5O
3: 0.01Tm, La
0.9GaO
3: 0.1Tm, La
0.98AlO
3: 0.02Tm, La
0.92Ga
0.6Al
0.4O
3: 0.08Tm, La
0.6Y
0.33Ga
0.4Al
0.6O
3: 0.07Tm, Gd
096Ga
0.35Al
0.65O
3: 0.04Tm or La
0.2Lu
0.75Ga
0.8Al
0.2O
3: 0.05Tm etc.
Yellow cathode-ray luminescence material can be selected Y
3Al
5O
12: Ce, Tb
3Al
5O
12: Ce, Gd
3Al
5O
12: Ce, Lu
3Al
5O
12: Ce, La
3Al
5O
12: Ce, Y
3Ga
5O
12: Ce, Y
3(Al
0.9, Ga
0.1)
5O
12: Ce, Y
3(Al
0.5, Ga
0.5)
5O
12: Ce, Y
3(Al
0.1, Ga
0.9)
5O
12: Ce, (Y
0.9, Gd
0.1)
3(Al
0.9, Ga
0.1)
5O
12: Ce, (Y
0.5, Gd
0.5)
3(Al
0.9, Ga
0.1)
5O
12: Ce or (Y
0.1, Gd
0.9)
3(Al
0.9, Ga
0.1)
5O
12: Ce etc.
The mass ratio that blue cathode-ray luminescence material mixes with yellow cathode-ray luminescence material is 0.5～10: 1.
Claims (10)
1. the method for an emitting white light by field emission, it is characterized in that, comprise: the mixture of cathode-ray exciting blue cathode-ray luminescence material and yellow cathode-ray luminescence material, send blue light and gold-tinted, blue light in the effective coverage of the photoluminescence excitation that is in yellow cathode-ray luminescence material that produces excites yellow cathode-ray luminescence material to send gold-tinted again, blue light and excite the gold-tinted composition generation white light of generation for twice;
Described blue cathode-ray luminescence material is Y
2SiO
5: Ce, Sr
2CeO
4Or La
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1;
Described yellow cathode-ray luminescence material is the rare-earth garnet system fluorescent material take Ce as activator.
2. the method for emitting white light by field emission as claimed in claim 1 is characterized in that the mass ratio of described blue cathode-ray luminescence material and yellow cathode-ray luminescence material is 0.5～10:1.
3. the method for emitting white light by field emission as claimed in claim 2 is characterized in that described blue cathode-ray luminescence material is that the emission spectrum crest is at the blue emitting material of 420～490nm.
4. the method for emitting white light by field emission as claimed in claim 3 is characterized in that, described blue cathode-ray luminescence material or partly replaced or replaced fully the La of La by Y, Gd, Lu, Sc
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1.
5. such as the method for emitting white light by field emission as described in claim 1～4 any one, it is characterized in that described yellow cathode-ray luminescence material is that excitation spectrum is at the Yellow luminous material of 420～490nm.
6. the method for emitting white light by field emission as claimed in claim 1 is characterized in that described rare-earth garnet system fluorescent material take Ce as activator is RE
3(Al, Ga)
5O
12: Ce, RE are at least a among Y, Tb, Gd, Lu, the La.
7. the device of an emitting white light by field emission, the positive plate assembly that comprises the minus plate assembly, arranges with minus plate assembly relative spacing, with the two supporter that is sealed connected together, it is characterized in that, described positive plate assembly comprises transparency carrier, be provided with successively transparent anode, luminous material layer in the transparency carrier side relative with the minus plate assembly, transparent anode is fitted on the transparency carrier, and described luminous material layer contains the mixture of blue cathode-ray luminescence material and yellow cathode-ray luminescence material;
Described blue cathode-ray luminescence material is Y
2SiO
5: Ce, Sr
2CeO
4Or La
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1;
Described yellow cathode-ray luminescence material is the rare-earth garnet system fluorescent material take Ce as activator.
8. the device of emitting white light by field emission as claimed in claim 7 is characterized in that, described rare-earth garnet system fluorescent material take Ce as activator is RE
3(Al, Ga)
5O
12: Ce, RE are at least a among Y, Tb, Gd, Lu, the La.
9. such as the device of emitting white light by field emission as described in claim 7 or 8, it is characterized in that described blue cathode-ray luminescence material is to produce the spectrum crest at the blue emitting material of 420～490nm under cathode-ray exciting.
10. the device of emitting white light by field emission as claimed in claim 9 is characterized in that, described blue cathode-ray luminescence material or partly replaced or replaced fully the La of La by Y, Gd, Lu, Sc
(1-x)Ga
(1-y)Al
yO
3: xTm, wherein 0＜x≤0.1,0≤y≤1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101073494A CN101894729B (en) | 2009-05-18 | 2009-05-18 | Method and device for emitting white light by field emission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101073494A CN101894729B (en) | 2009-05-18 | 2009-05-18 | Method and device for emitting white light by field emission |
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|---|---|
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| CN101894729B true CN101894729B (en) | 2013-03-20 |
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|---|---|---|---|---|
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| JP2009032683A (en) * | 2007-07-03 | 2009-02-12 | Fuji Heavy Ind Ltd | Light emitting device |
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2009
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