CN101271822A - Cold cathode fluorescent lamp - Google Patents
Cold cathode fluorescent lamp Download PDFInfo
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- CN101271822A CN101271822A CNA200710091816XA CN200710091816A CN101271822A CN 101271822 A CN101271822 A CN 101271822A CN A200710091816X A CNA200710091816X A CN A200710091816XA CN 200710091816 A CN200710091816 A CN 200710091816A CN 101271822 A CN101271822 A CN 101271822A
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- ultraviolet light
- cold
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- fluorescence
- cathode fluorescence
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Abstract
The invention provides a cold cathode fluorescence lamp, comprising a lamp tube, a fluorescence layer, an electrode pair and a discharging gas. The lamp tube is provided with a chamber; the fluorescence layer is arranged on the internal wall of the chamber; the fluorescence layer comprises a plurality of fluorescence particles and ultraviolet light penetrated particles; the electrode pair is arranged at the two ends of the chamber and the discharging gas is filled in the chamber.
Description
Technical field
The present invention is about a kind of cold-cathode fluorescence lamp, particularly about a kind of cold-cathode fluorescence lamp of promoting luminous efficiency.
Background technology
Along with industry is flourishing day by day, digitization tools such as mobile phone, digital camera, notebook computer, desktop computer develop towards more convenient, greater functionality and direction more attractive in appearance invariably.The display screen of these electronic products is indispensable man-machine communication interfaces, and the display screen of the said goods can be the user and brings more operation convenient.In recent years, display screen on most mobile phone, digital camera, digital code camera, notebook computer and the desktop computer is a main flow with display panels (LCD panel) all, yet, because display panels itself does not have luminous function, so below display panels, must provide a backlight module (back light module) so that light source to be provided, and then reach the function of demonstration.
Traditional backlight module comprise light-emittingdiode backlight module and cathode fluorescent tube (coldcathode fluorescent lamp, CCFL) etc.According to the position difference of backlight, backlight module generally can be divided into two kinds of side-light type and straight-down negatives.
Figure 1A is a kind of structural representation of traditional cold cathode fluorescent lamp.See also Fig. 1, traditional cold-cathode fluorescence lamp 1 comprises a fluorescent tube 11, a fluorescence coating 12 and an electrode pair 13.Wherein, fluorescent tube 11 inside have a cavity 16 and a filling discharge gas, and discharge gas comprises an inert gas 16a and a mercury vapour 16b, and fluorescence coating 12 is coated on the inwall of cavity 16, electrode pair 13 is disposed at the cavity two ends respectively, and electrically connects with a power supply (not shown).When power drives electrode pair 13, electrode pair 13 discharges in cavity 16, free electron quickens to advance under high voltage electric field drives simultaneously, in this process, electronics can collide and the produce power exchange with inert gas 16a and mercury vapour 16b, mercury vapour 16b promptly is excited to excitation state, return ground state immediately, and mercury vapour 16b is when getting back to ground state, can release energy with the form of emitting ultraviolet light, and during the fluorescence coating 12 of ultraviolet excitation cavity 16 inwalls that discharged as mercury vapour 16b, fluorescence coating 12 can radiate visible light behind the absorbed radiation energies, and reaches luminous purpose.
See also Figure 1B, Figure 1B is the partial schematic diagram of the fluorescence coating of Figure 1A.According to the consideration of luminous efficiency and processing procedure characteristic, traditional fluorescence coating 12 is inwalls of coating cavity 16 with sandwich construction.When cavity 16 inner generation ultraviolet lights and fluorescence excitation layer 12, because traditional fluorescence coating 12 is a sandwich construction, therefore, the fluorescence coating bottom is not easy by ultraviolet excitation, that is the fluorescence coating of close fluorescent tube 11 tube walls has the lower rate that is excited, thus, cause the luminous efficiency of cold-cathode fluorescence lamp 1 to promote.
Therefore, how to provide a kind of cold-cathode fluorescence lamp, can improve glorious degrees effectively, real is one of important topic now.
Summary of the invention
Because above-mentioned, the objective of the invention is is providing a kind of cold-cathode fluorescence lamp that can improve glorious degrees.
For reach above-mentioned or with other purposes, the present invention proposes a kind of cold-cathode fluorescence lamp, comprises a fluorescent tube, a fluorescence coating, an electrode pair and a discharge gas.Fluorescent tube has a cavity, and fluorescence coating is disposed on the inwall of cavity, and fluorescence coating comprises a plurality of fluorescent particles and ultraviolet light penetrating particle, and electrode pair is arranged at the two ends of cavity, and the discharge gas filling is in cavity.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein the ultraviolet light penetrating particle can approximately penetrate between the ultraviolet light between the 140nm to 380nm for wave-length coverage.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein the material of ultraviolet light penetrating particle is silica, aluminium oxide, lanthana, yittrium oxide, zirconia, calcium oxide or its mixture.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein the ultraviolet light penetrating particle is shaped as circle, ellipse, irregular shape or strip.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein discharge gas comprises an inert gas and a mercury vapour.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein inert gas comprises xenon, argon gas, helium or deuterium gas.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein the material of fluorescent tube is quartz glass, Pyrex or iron-free borosilicate glass.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, it also comprises two leads, runs through and extend to the inner space of fluorescent tube respectively from the fluorescent tube outside.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein an end of lead is connected in electrode and is disposed in the inner space of cavity.
For reach above-mentioned or with other purposes, the present invention proposes a kind of cold-cathode fluorescence lamp in addition, comprises that a fluorescent tube, a fluorescence coating, a ultraviolet light penetrate film, an electrode pair and a discharge gas.Fluorescent tube has a cavity, and fluorescence coating is arranged on the inwall of cavity, and the fluorescence coating fluorescence coating has a plurality of depressed parts, and electrode pair is arranged at the two ends of cavity, and the discharge gas filling is in cavity.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, it comprises that also a ultraviolet light penetrates film and is covered on the fluorescence coating.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein depressed part is to be provided with continuously or discontinuous setting each other.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein depressed part is shaped as circle, rectangle or arbitrary shape.
According to the described cold-cathode fluorescence lamp of preferred embodiment of the present invention, wherein fluorescence coating comprises a plurality of fluorescent particles and ultraviolet light penetrating particle.
In sum, in cold-cathode fluorescence lamp of the present invention, fluorescence coating includes a plurality of ultraviolet light penetrating particles or fluorescence coating and is coated with a ultraviolet light and penetrates film, therefore, fluorescent particles in the fluorescence coating bottom can be excited fully, thus, can improve the glorious degrees of cold-cathode fluorescence lamp.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A is a kind of structural representation of traditional cold-cathode fluorescence lamp;
Figure 1B is the partial schematic diagram of the fluorescence coating of Figure 1A;
Fig. 2 A and Fig. 2 B are the structural representation of cold-cathode fluorescence lamp of a preferred embodiment of the present invention and the partial schematic diagram of fluorescence coating;
And
Fig. 3 and Fig. 4 are the cutaway view of the cold-cathode fluorescence lamp of another kind of preferred embodiment of the present invention.
The main element symbol description
Cold- cathode fluorescence lamp 1,2,3 mercury vapour 16b, 27
Embodiment
First embodiment
Fig. 2 A illustrates the structural representation of cold-cathode fluorescence lamp of a preferred embodiment of the present invention and the partial schematic diagram of fluorescence coating.Please refer to Fig. 2 A, the cold-cathode fluorescence lamp 2 of present embodiment mainly comprises a fluorescent tube 21, a fluorescence coating 22 and an electrode pair 23.Fluorescent tube 21 is a closed tube, and its shape is not limited to the shown cylindrical tube as Fig. 2 A, and other non-cylindrical configurations for example are various square column structures, U-shaped structure or irregularly shaped structure, all within the scope of the invention.Be formed with a cavity 26 in fluorescent tube 21 inside, be injected with a discharge gas in cavity 26, in the present embodiment, discharge gas is mercury vapour 27 and inert gas 28, and inert gas comprises xenon, argon gas, helium, deuterium gas and combination thereof.The material of fluorescent tube 21 for example is quartz glass, Pyrex or iron-free borosilicate glass.
In the present embodiment, electrode pair 23 comprises an anode and a negative electrode, is arranged at the two ends of cavity 26 respectively, and electrically connects by a lead 24 and an external power source (not shown) respectively.Lead 24 runs through and extends to the inner space and electrode pair 23 electric connections of fluorescent tube 21 from the outside of fluorescent tube 21.
Please continue to consult Fig. 2 A, fluorescence coating 22 is a sandwich construction, is to be arranged on the inwall of cavity 26 in the mode that for example is coated with.Fluorescence coating that it should be noted that present embodiment comprises a plurality of fluorescent particles 221 and a plurality of transparent ultraviolet light penetrating particle 222, and a plurality of ultraviolet light penetrating particles 222 are disposed in the fluorescence coating 22 equably with fluorescent particles 221.The cold-cathode fluorescence lamp 2 of present embodiment in use, the anode and the negative electrode of electrode pair 23 are electrically connected to external power supply respectively and produce bias voltage, filling is excited to excitation state in the discharge gas of cavity 26 inside, return ground state immediately, when discharge gas is got back to ground state, release energy with the form of launching ultraviolet light.Because the fluorescence coating 22 of present embodiment has transparent ultraviolet light penetrating particle 222, therefore, when discharge gas radiates ultraviolet light and fluorescence excitation layer 22, ultraviolet light can penetrate ultraviolet light penetrating particle 222 and arrive the different corner of fluorescence coating and the degree of depth, also can excite simultaneously around ultraviolet light penetrating particle 222 fluorescent particles 221 on every side, further, ultraviolet light can penetrate into the bottom of fluorescence coating 22.In the present embodiment, ultraviolet light penetrating particle 222 can approximately penetrate between the ultraviolet light between the 140nm to 380nm for wave-length coverage.
Be noted that, the material of the ultraviolet light penetrating particle 222 of present embodiment is for not absorbing ultraviolet light but can allow ultraviolet light to penetrate, for example silica (SiO2), aluminium oxide (Al2O3), lanthana (La2O3), yittrium oxide (Y2O3), zirconia (ZrO2), calcium oxide (Ca2O3) or its mixture.Please continue to consult Fig. 2 A, the shape of ultraviolet light penetrating particle 222 for example is circular, oval or both combinations, and certainly, the shape of ultraviolet light penetrating particle 222 can be other geometry, for example is long strip type or irregular shape, and is shown as Fig. 2 B.Ultraviolet light penetrating particle 222a by strip is disposed in the fluorescence coating 22, therefore, the end that ultraviolet light can be grown the limit by the ultraviolet light penetrating particle 222a of strip penetrates incident, and the ultraviolet light penetrating particle 222a of configuration strip can make the thickness of fluorescence coating 32 increase, utilize elongate in shape ultraviolet light to be directed in the fluorescence coating 22 of deep layer more, so that more fluorescent particles 221 is excited, therefore, and then improve the glorious degrees of cold cathode fluorescent lamp 2 effectively.
Second embodiment
Shown in Figure 3ly go out to be cutaway view that the cold-cathode fluorescence lamp 3 of present embodiment has similar structure to the cold-cathode fluorescence lamp of the foregoing description according to the cold-cathode fluorescence lamp 3 of another preferred embodiment of the present invention.Be that with the foregoing description difference the fluorescence coating 32 of present embodiment has a plurality of depressed parts 321, depressed part is to be provided with continuously or discontinuous setting each other.The mode that depressed part 321 forms for example is to utilize a utensil to be formed with a plurality of depressed parts 321 on fluorescence coating 32.In the present embodiment, depressed part 321 can be circle, rectangle or arbitrary shape.Depressed part 321 is the long side direction settings along cold-cathode fluorescence lamp 3, and the depressed part 321 of fluorescence coating can increase the surface area of fluorescence coating 32 effectively, therefore, and then has improved the luminous efficiency of cold-cathode fluorescence lamp 3 effectively.In the present embodiment, comprise that also a ultraviolet light penetrates film 35 and is covered on the fluorescence coating 32.In more detail, ultraviolet light penetrates film 35 and is covered on the fluorescence coating 32 with depressed part 321.Ultraviolet light penetrates film 35 can make wave-length coverage approximately penetrate between the ultraviolet light between the 140nm to 380nm, and its material is selected from silica, aluminium oxide, lanthana, yittrium oxide, zirconia, calcium oxide and group that combination constituted thereof.Ultraviolet light by present embodiment penetrates film 35, can penetrate ultraviolet light when discharge gas radiates ultraviolet light and penetrate film and fluorescence excitation layer 32, to produce visible light.Because the fluorescence coating of present embodiment has transparent ultraviolet light penetrating particle, therefore, the surface area that fluorescence coating 32 is excited increases.In addition; the ultraviolet light of present embodiment penetrates the effect that film 35 can provide fluorescence coating 32 protections; avoid cold-cathode fluorescence lamp 3 in use; fluorescence coating 32 is subjected to mercury and isoionic erosion and damages; thus, can increase useful life of cold-cathode fluorescence lamp 3 and improve the whole glorious degrees of cold-cathode fluorescent effectively.
In sum, cold cathode lamp of the present invention has following advantage:
Fluorescence coating of the present invention has transparent ultraviolet light penetrating particle, therefore, compared to conventional art, the fluorescent particles that increases the fluorescence coating bottom is excited, and then the luminous efficiency of cold-cathode fluorescence lamp is improved.
Fluorescence coating of the present invention has the design of depressed part, therefore can increase the area of fluorescence coating, and the glorious degrees of cold-cathode fluorescence lamp integral body is increased.
Moreover, because ultraviolet light of the present invention penetrates film, ultraviolet ray is penetrated also can protect fluorescence coating, make its erosion of avoiding being subjected to plasma and mercury, therefore can increase the useful life of cold cathode fluorescent lamp effectively.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (14)
1. cold-cathode fluorescence lamp comprises:
One fluorescent tube has a cavity;
One fluorescence coating is disposed on the inwall of this cavity, and this fluorescence coating comprises a plurality of fluorescent particles and a plurality of ultraviolet light penetrating particle;
One electrode pair is coupled in this fluorescent tube; And
One discharge gas, filling is in this cavity.
2. cold-cathode fluorescence lamp according to claim 1, wherein this fluorescence coating has a plurality of depressed parts.
3. cold-cathode fluorescence lamp comprises:
One fluorescent tube has a cavity;
One fluorescence coating is arranged on the inwall of this cavity, and this fluorescence coating has a plurality of depressed parts;
One electrode pair is coupled in this fluorescent tube; And
One discharge gas, filling is in this cavity.
4. according to claim 2 or 3 described cold-cathode fluorescence lamps, wherein those depressed parts are to be provided with continuously or discontinuous setting each other.
5. according to claim 2 or 3 described cold-cathode fluorescence lamps, wherein those depressed parts is shaped as circle, rectangle or arbitrary shape.
6. according to claim 1 or 3 described cold-cathode fluorescence lamps, it comprises that also a ultraviolet light penetrates film and is covered on this fluorescence coating, and wherein to penetrate the material of film be silica, aluminium oxide, lanthana, yittrium oxide, zirconia, calcium oxide or its mixture to this ultraviolet light.
7. cold-cathode fluorescence lamp according to claim 6, wherein this ultraviolet light penetrates film and can approximately penetrate between the ultraviolet light between the 140nm to 380nm for wave-length coverage.
8. cold-cathode fluorescence lamp according to claim 3, wherein this fluorescence coating comprises a plurality of fluorescent particles and a plurality of ultraviolet light penetrating particle.
9. according to claim 1 or 8 described cold-cathode fluorescence lamps, wherein those ultraviolet light penetrating particles can approximately penetrate between the ultraviolet light between the 140nm to 380nm for wave-length coverage.
10. according to claim 1 or 8 described cold-cathode fluorescence lamps, wherein the material of those ultraviolet light penetrating particles is silica, aluminium oxide, lanthana, yittrium oxide, zirconia, calcium oxide or its mixture.
11. according to claim 1 or 8 described cold-cathode fluorescence lamps, wherein those ultraviolet light penetrating particles is shaped as circle, ellipse, irregular shape or strip.
12. according to claim 1 or 3 described cold-cathode fluorescence lamps, wherein this discharge gas comprises an inert gas and a mercury vapour, this inert gas comprises xenon, argon gas, helium, deuterium gas or its combination.
13. according to claim 1 or 3 described cold cathode fluorescent lamp, wherein this fluorescent tube is quartz glass, Pyrex or iron-free borosilicate glass.
14. according to claim 1 or 3 described cold cathode fluorescent lamp, it also comprises two leads, run through and extend to the inner space of this fluorescent tube respectively from this fluorescent tube outside, wherein an end of those leads is electrically connected at those electrodes, and is disposed at the inner space of this fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710091816XA CN101271822A (en) | 2007-03-23 | 2007-03-23 | Cold cathode fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710091816XA CN101271822A (en) | 2007-03-23 | 2007-03-23 | Cold cathode fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101271822A true CN101271822A (en) | 2008-09-24 |
Family
ID=40005679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710091816XA Pending CN101271822A (en) | 2007-03-23 | 2007-03-23 | Cold cathode fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101271822A (en) |
-
2007
- 2007-03-23 CN CNA200710091816XA patent/CN101271822A/en active Pending
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Open date: 20080924 |