CN100461331C - Light negative assembly, light source structure and fluorescent tube - Google Patents
Light negative assembly, light source structure and fluorescent tube Download PDFInfo
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- CN100461331C CN100461331C CNB2005100516228A CN200510051622A CN100461331C CN 100461331 C CN100461331 C CN 100461331C CN B2005100516228 A CNB2005100516228 A CN B2005100516228A CN 200510051622 A CN200510051622 A CN 200510051622A CN 100461331 C CN100461331 C CN 100461331C
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- electrode
- fluorescent tube
- bending surface
- pipe portion
- light
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Abstract
The light source structure consists of a tube and an electrode. The electrode is located in the tube and has buckling surface. By changing the shape of electrode, the surface of electrode is increased to raise the luminous efficiency and reduce the temperature of the electrode.
Description
Technical field
The present invention relates to a kind of backlight assembly with and light-source structure, particularly relate to a kind of light-source structure that strengthens luminous efficiency and reduce electrode temperature.
Background technology
(Cold Cathode Fluorescent Lamp CCFL) is one of the primary clustering of light source of the light-source structure of present backlight assembly to general cold cathode fluorescent lamp.Shown in Figure 1A, known fluorescent tube 10 ' is made of a double glazing pipe (hollow glass tube) 11 ', electrode (electrodes) 12a ', 12b ' and lead 13a ', 13b ', electrode 12a ', 12b ' and lead 13a ', 13b ' are arranged at the two ends of double glazing pipe 11 ' respectively, and mercury (Hg), phosphor powder (phosphor) place in the double glazing pipe 11 ' with inert gas (inert gas, not shown).Electrode 12a ', 12b ' constitute for cylindrical metal, the basic principle of fluorescent tube 10 ' is the electrode 12a ' that high pressure is put on fluorescent tube, electronics is penetrated by the electrode 12a ' of the past high-pressure side of electrode 12b ' of low-pressure end, electronics because of be subjected to high voltage quicken with double glazing pipe 11 ' in inert gas clash into mercury atom, mercury atom is when being returned stable state by the bump back rapidly by labile state, the energy of surplus can be discharged with ultraviolet ray (UV), this ultraviolet ray that discharges is absorbed by phosphor powder and converts visible light to.
Yet, when electronics is launched by low-pressure end, when striking electrode tip 12b ' with high pressure with gas ion, portion gas ion 16 ' can sputter on the surface 15 ' of electrode 12b ', shown in Figure 1B.Long more when the service time of fluorescent tube 10 ', electrode surface 15 ' is enlarged gradually by gas ion 16 ' sputter area, if after the complete sputter of electrode surface 15 ' quilt, then stop electrode life.
Therefore, electrode surface 15 ' is of a specified duration more by the time of complete sputter, and then electrode life is long more.Moreover electrode surface area is big more, and the area of sputter also can become greatly, also can be lower in the temperature that electrode tip produced.
On the other hand, for the luminous efficiency of fluorescent tube, the electrode tip surface area of emitting electrons is big more, and the releasable electronics of institute is many more, can produce more UV light, and luminous efficiency is then good more.
Yet present traditional type fluorescent tube only can increase the length L of electrode ' increase electrode surface area, indicate as Figure 1A.Even surface area has increased, but in order to satisfy the consumer for the compact demand of display, and do not increase whole fluorescent tube length and weight, make effective luminous zone E ' diminish on the contrary.Therefore, because effectively reduce the luminous zone, make luminous efficiency still obviously not enough.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of light-source structure,, increase electrode surface area,, and reduce electrode temperature with the luminous efficiency of increase fluorescent tube by changing the shape of electrode.
The invention provides a kind of light-source structure, comprise a pipe portion and an electrode, electrode is arranged in the pipe portion, and has a bending surface that can increase this electrode surface area, and on the cross section of this electrode, this bending surface comprises a plurality of protuberances.
The bending surface be wavy (waved, concavo-convex), gauffer (bellows) shape, zigzag (castellated, ragged) or dentation (tooth).
In a preferred embodiment, the bending surface of electrode comprises a plurality of protuberances, and protuberance has a tip, and protuberance is connected to each other.
In another preferred embodiment, the bending surface of electrode comprises a plurality of bends, and bend is connected to each other.
Electrode is the cup-shaped with an opening and a closure, and the bending surface connects closure, and opening is towards the central part of pipe portion.Light-source structure also comprises the closure of an electrode electrically connected and the lead of pipe portion.
The shape of cross section of electrode is essentially non-circular, promptly comprises star, flower shape or the above-mentioned combination of gear-like, radiation.
In one embodiment, electrode can be positive electrode, and light-source structure also can comprise a negative electrode that is oppositely arranged with positive electrode, and negative electrode has a bending surface that can increase this electrode surface area.
Electrode is to be made by metal powder metallurgy (metal-powder metallurgy) or sheet metal punching out.Light-source structure is cathode fluorescent tube (CCFL).
Again in the present invention, provide a kind of backlight assembly, comprise a framework, a reflecting plate and a fluorescent tube.Reflecting plate is arranged in the framework.Fluorescent tube is arranged on the reflecting plate, comprises a pipe portion and an electrode, and electrode is arranged in the pipe portion, and has a bending surface that can increase this electrode surface area, and on the cross section of this electrode, this bending surface comprises a plurality of protuberances.
Backlight assembly also comprises at least one optical thin film layer that is arranged on the fluorescent tube.
The invention provides a kind of fluorescent tube, comprise a pipe portion, one first electrode and one second electrode.Pipe portion has an inert gas and a mercury.First electrode is arranged at an end of pipe portion, and has first a bending surface that can increase this electrode surface area, and on the cross section of this first electrode, this first bending surface comprises a plurality of protuberances.Second electrode is arranged at the other end of pipe portion, and has second a bending surface that can increase this electrode surface area, and on the cross section of this second electrode, this second bending surface comprises a plurality of protuberances.Two leads lay respectively at the two ends of pipe portion, and the adapter portion and first electrode and second electrode are electrically connected.
The inwall of pipe portion is provided with phosphor powder (phosphor).
Inert gas can be selected from the mist of helium, neon, argon gas, krypton gas, xenon, radon gas or at least two inert gases.
For above and other objects of the present invention, feature and advantage can be become apparent,, and in conjunction with the accompanying drawings, be described in detail below below especially exemplified by a preferred embodiment.
Description of drawings
Figure 1A shows the generalized section of known light-source structure;
Figure 1B is the electrode partial schematic diagram of known light-source structure;
Fig. 2 is the schematic perspective view of expression backlight assembly of the present invention;
Fig. 3 A is the generalized section of expression light-source structure of the present invention;
Fig. 3 B is the wherein schematic perspective view of an electrode of expression light-source structure of the present invention;
Fig. 4 A shows the bending surface section schematic diagram of observing along the AA ' hatching of Fig. 3 B;
Fig. 4 B is the generalized section that shows along a variation example on the bending surface that the AA ' hatching of Fig. 3 B is observed;
Fig. 4 C is the generalized section that shows along another variation example on the bending surface that the AA ' hatching of Fig. 3 B is observed.
The reference numeral explanation
10～light-source structure
10 '～known fluorescent tube:
11～pipe portion
11 '～double glazing pipe
12a～first electrode (positive electrode)
12b～second electrode (negative electrode)
12a ', 12b '～positive and negative electrode
120～closure
121a～first bending the surface
121b～second bending the surface
121 ', 121 "～the bending surface
122～opening
123,125～protuberance
123a～tip
124～bend
13a, 13b, 13a ', 13b '～lead
15 '～electrode surface
16 '～gas ion
20～framework
30～reflecting plate
40～diffuser plate
100～backlight assembly
L, L '～electrode length
E, E '～effective luminous zone
Embodiment
Fig. 2 is the schematic perspective view that shows backlight assembly 100 of the present invention.Backlight assembly of the present invention 100 is applicable to LCD, and it comprises a framework 20, a reflecting plate 30, diffuser plate 40 and a light-source structure 10.Reflecting plate 30 is arranged in the framework 20.Light-source structure 10 is arranged on the reflecting plate 30.Light-source structure 10 can be cathode fluorescent tube (CCFL).The present invention mainly is the luminous efficiency of improvement backlight assembly 100, therefore omits other assembly in the explanation backlight assembly 100.
Fig. 3 A is the generalized section of expression light-source structure 10 of the present invention.Light-source structure 10 comprises pipe portion 11, first, second electrode 12a, 12b and two lead 13a, 13b, and the first electrode 12a is a positive electrode, and the second electrode 12b is a negative electrode.First, second electrode 12a, 12b are arranged at the two ends of pipe portion 11 respectively, and first, second electrode 12a, 12b have first, second respectively and bend surperficial 121a, 121b.Lead 13a, 13b lay respectively at the two ends of pipe portion 11, and the adapter portion 11 and the first electrode 12a and the second electrode 12b are electrically connected.Have mercury (Hg), phosphor powder (phosphor) and inert gas (not shown) in the pipe portion 11, phosphor powder is located at the inwall of pipe portion 11.Inert gas can be selected from the mist of helium, neon, argon gas, krypton gas, xenon, radon gas or at least two inert gases.
In other words, negative electrode 12b is arranged at an end of pipe portion 11, by the surperficial 121b of bending discharge electronics because of be subjected to high voltage quicken with pipe portion 11 in the molecule of inert gas discharge ultraviolet light after colliding with mercury atom.And positive electrode 12a is arranged at the other end of pipe portion 11, the part inert gas ion then sputter in the bending surperficial 121a on.
Fig. 3 B is the schematic perspective view of the first electrode 12a of expression light-source structure 10 of the present invention.Shown in Fig. 3 A and 3B, the first electrode 12a is the cup-shaped with an opening 122 and a closure 120, bends surperficial 121a and connects closure 120, and opening 122 is towards the central part of pipe portion 11.Closure 120 and the pipe portion 11 of lead 13a electrode electrically connected 12a.
First, second electrode 12a, 12b can be made by metal powder metallurgy (metal-powder metallurgy) or sheet metal punching out, therefore, can save manufacturing cost.The present invention can keep electrode length L by changing electrode shape, also can shorten electrode length L, to increase effective luminous zone E.
Knowing clearly it, is example with the first electrode 12a, bends surperficial 121a and can be zigzag (castellated orragged).Fig. 4 A is the bending surface 121a generalized section of the electrode 12a under demonstration is observed along the AA ' hatching of Fig. 3 B.The bending surface 121a of electrode 12a comprises a plurality of protuberances 123, and each protuberance 123 has a most advanced and sophisticated 123a, and protuberance 123 is connected to each other.Also promptly, the shape of cross section of electrode 12a is essentially non-circular.
It should be noted that the present invention can have the different examples that change, and changes in the example one, part same as the previously described embodiments will repeat no more.Change in the example at this, have only negative electrode 12b to have the surperficial 121b of bending, and the surface of positive electrode 12a can be maintained smooth surface.Even have only negative electrode 12b to have the surperficial 121b of bending, as long as the surface area of emission electrode end increases, the releasable electronics of institute is many more, can produce more UV light, and luminous efficiency is then good more.Vice versa, has only positive electrode 12a to have the surperficial 121a of bending in light-source structure 10, because electrode surface area is big more, the area of sputter also can become greatly, but the sputter time is then elongated.Therefore, can prolong electrode life, also can reduce in the temperature that electrode tip produced.
The present invention also can have the different examples that change, shown in Fig. 4 B, bending surface 121 ' be wavy (waved, concavo-convex), also, bending surperficial 121 ' comprises a plurality of bends 124, bend 124 is connected to each other.
In the another variation example, shown in Fig. 4 C, bending surface 121 " be gauffer (bellows) shape or dentation (tooth), also, and bending surface 121 " comprise a plurality of protuberances 125, protuberance 125 is connected to each other.
Therefore, the present invention is by changing electrode shape and increase the radially area of electrode, with the luminous efficiency that reaches light-source structure and the increase of brightness, not only can reduce electrode temperature, prolongs the life-span of electrode and fluorescent tube simultaneously.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; certainly can do various changes and retouching, thus protection scope of the present invention should with claims scope was defined is as the criterion.
Claims (31)
1. light-source structure comprises:
One pipe portion; And
One electrode, this electrode are arranged in this pipe portion, and have a bending surface that can increase this electrode surface area, and on the cross section of this electrode, this bending surface comprises a plurality of protuberances.
2. light-source structure as claimed in claim 1 is characterized in that: this bending surface is wavy, gauffer shape or dentation.
3. light-source structure as claimed in claim 2 is characterized in that: this dentation is a zigzag.
4. light-source structure as claimed in claim 1 is characterized in that: the bending surface of this electrode comprises a plurality of bends, and these bends are connected to each other.
5. light-source structure as claimed in claim 1 is characterized in that: this electrode is a cup-shaped, and this cup-shaped has an opening and a closure, and this bending surface connects this closure, and this opening is towards the central part of this pipe portion.
6. light-source structure as claimed in claim 5 is characterized in that: comprise that also one is electrically connected this closure of this electrode and the lead of this pipe portion.
7. light-source structure as claimed in claim 1 is characterized in that: the shape of cross section of this electrode is star, flower shape or the above-mentioned combination of gear-like, radiation.
8. light-source structure as claimed in claim 1 is characterized in that: this electrode is a positive electrode, and this light-source structure also comprises a negative electrode that is oppositely arranged with this positive electrode, and this negative electrode has a bending surface that can increase this electrode surface area.
9. light-source structure as claimed in claim 1 is characterized in that: this electrode is to be made by metal powder metallurgy or sheet metal punching out.
10. light-source structure as claimed in claim 1 is characterized in that: this light-source structure is a cathode fluorescent tube.
11. a backlight assembly comprises:
One framework;
One is arranged at the reflecting plate in this framework; And
One fluorescent tube, this fluorescent tube is arranged on this reflecting plate, comprises a pipe portion and an electrode, and this electrode is arranged in this pipe portion, and has a bending surface that can increase this electrode surface area, and on this electrode cross-section, this bending surface comprises a plurality of protuberances.
12. backlight assembly as claimed in claim 11 is characterized in that: this bending surface is wavy, gauffer shape or dentation.
13. backlight assembly as claimed in claim 11 is characterized in that: also comprise at least one optical thin film layer that is arranged on this fluorescent tube.
14. backlight assembly as claimed in claim 12 is characterized in that: this dentation is a zigzag.
15. backlight assembly as claimed in claim 11 is characterized in that: the bending surface of this electrode comprises a plurality of bends, and these bends are connected to each other.
16. backlight assembly as claimed in claim 11 is characterized in that: this electrode is a cup-shaped, and this cup-shaped has an opening and a closure, and this bending surface connects this closure, and this opening is towards the central part of this pipe portion.
17. backlight assembly as claimed in claim 16 is characterized in that: this fluorescent tube comprises that also one is electrically connected this closure of this electrode and the lead of this pipe portion.
18. backlight assembly as claimed in claim 11 is characterized in that: the shape of cross section of this electrode is star, flower shape or the above-mentioned combination of gear-like, radiation.
19. backlight assembly as claimed in claim 11 is characterized in that: this electrode is a positive electrode, and this fluorescent tube also comprises a negative electrode that is oppositely arranged with this positive electrode, and this negative electrode comprises that one can increase the bending surface of this electrode surface area.
20. backlight assembly as claimed in claim 11 is characterized in that: this electrode is to be made by metal powder metallurgy or sheet metal punching out.
21. backlight assembly as claimed in claim 11 is characterized in that: this fluorescent tube is a cathode fluorescent tube.
22. a fluorescent tube comprises:
One has the pipe portion of an inert gas and a mercury;
One first electrode, this first electrode is arranged at an end of this pipe portion, and has first a bending surface that can increase this first electrode surface area, and on this first electrode cross-section, this first bending surface comprises a plurality of protuberances;
One second electrode, this second electrode is arranged at the other end of this pipe portion, and has second a bending surface that can increase this second electrode surface area, and on this second electrode cross-section, this second bending surface comprises a plurality of protuberances; And
Two leads, described two leads lay respectively at the two ends of this pipe portion, are electrically connected this pipe portion and this first electrode, this pipe portion and this second electrode respectively.
23. fluorescent tube as claimed in claim 22 is characterized in that: the inwall of this pipe portion is provided with phosphor powder.
24. fluorescent tube as claimed in claim 22 is characterized in that: this inert gas is selected from helium, neon, argon gas, krypton gas, xenon, radon gas or the mist of at least two kinds of these inert gases wherein.
25. fluorescent tube as claimed in claim 22 is characterized in that: this first bending surface and this second bending surface are respectively wavy, gauffer shape or dentation.
26. fluorescent tube as claimed in claim 25 is characterized in that: this dentation is a zigzag.
27. fluorescent tube as claimed in claim 22 is characterized in that: this first bending surface and this second bending surface comprise a plurality of bends respectively, and these bends are connected to each other.
28. fluorescent tube as claimed in claim 22 is characterized in that: the shape of cross section of this first electrode and this second electrode is respectively the star of gear-like, radiation, flower shape or above-mentioned combination.
29. fluorescent tube as claimed in claim 22 is characterized in that: this first electrode is a negative electrode, and this second electrode is a positive electrode.
30. fluorescent tube as claimed in claim 22 is characterized in that: this first electrode and this second electrode are to be made by metal powder metallurgy or sheet metal punching out.
31. fluorescent tube as claimed in claim 22 is characterized in that: this fluorescent tube is a cathode fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100516228A CN100461331C (en) | 2005-02-08 | 2005-02-08 | Light negative assembly, light source structure and fluorescent tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100516228A CN100461331C (en) | 2005-02-08 | 2005-02-08 | Light negative assembly, light source structure and fluorescent tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645553A CN1645553A (en) | 2005-07-27 |
| CN100461331C true CN100461331C (en) | 2009-02-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100516228A Expired - Fee Related CN100461331C (en) | 2005-02-08 | 2005-02-08 | Light negative assembly, light source structure and fluorescent tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100461331C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150880A (en) * | 1992-11-10 | 1994-05-31 | Matsushita Electric Works Ltd | Electrode for discharge lamp |
| JPH07240174A (en) * | 1994-02-28 | 1995-09-12 | Toshiba Lighting & Technol Corp | Low pressure mercury discharge lamp and lighting system |
| JPH08190891A (en) * | 1995-01-09 | 1996-07-23 | Harrison Denki Kk | Cold cathode low pressure discharge lamp |
| JP2002025499A (en) * | 2000-07-07 | 2002-01-25 | Harison Toshiba Lighting Corp | Cold cathode fluorescent lamp |
-
2005
- 2005-02-08 CN CNB2005100516228A patent/CN100461331C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150880A (en) * | 1992-11-10 | 1994-05-31 | Matsushita Electric Works Ltd | Electrode for discharge lamp |
| JPH07240174A (en) * | 1994-02-28 | 1995-09-12 | Toshiba Lighting & Technol Corp | Low pressure mercury discharge lamp and lighting system |
| JPH08190891A (en) * | 1995-01-09 | 1996-07-23 | Harrison Denki Kk | Cold cathode low pressure discharge lamp |
| JP2002025499A (en) * | 2000-07-07 | 2002-01-25 | Harison Toshiba Lighting Corp | Cold cathode fluorescent lamp |
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| Publication number | Publication date |
|---|---|
| CN1645553A (en) | 2005-07-27 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20090211 Termination date: 20220208 |