CN1055349C - Non-filament closed ring type gas discharge lamp - Google Patents
Non-filament closed ring type gas discharge lamp Download PDFInfo
- Publication number
- CN1055349C CN1055349C CN96115774A CN96115774A CN1055349C CN 1055349 C CN1055349 C CN 1055349C CN 96115774 A CN96115774 A CN 96115774A CN 96115774 A CN96115774 A CN 96115774A CN 1055349 C CN1055349 C CN 1055349C
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- gas discharge
- discharge lamp
- lamp tube
- ring type
- closed ring
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention provides an enclosed annular gas discharge lamp without filament, which belongs to gas discharge type lamp fittings. The present invention is characterized in that a lamp tube forms an enclosed annular shape, and a filament for emitting electrons does not exist in the lamp tube. The present invention enables the lamp tube to emit light by the method that induced current is generated in the enclosed annular lamp tube. Because the filament does not exist in the lamp tube of the present invention, the service life of the lamp tube is long; thus, the lamp tube is a permanent lamp tube. The present invention can be used for manufacturing gas discharge type lamp fittings such as fluorescent lamps, xenon lamps, sodium-vapor lamps, etc.
Description
The present invention relates to a kind of gaseous discharge lamp, particularly a kind of non-filament gas discharge lamp.
Filament is all arranged in the existing gas discharge lamp tube usually, its operation principle is: add high voltage between the filament of lamp tube ends, make the gas ionization in the fluorescent tube become conductor, rely on the filament emitting electrons to form electric current, electric current flows through ionized gas, gas molecule is excited and luminous.Because of filament at high temperature just has stronger emitting electrons ability, so filament will be operated under the condition of high temperature.Under the bump of action of high temperature and electronics, the working life of filament is shorter, and this makes filament damage becomes the main cause that fluorescent tube damages, and has caused the working life of fluorescent tube not long.
From basic ways of addressing this issue is the cancellation filament.The existing practice is: the pair of plates electrode is set in fluorescent tube, constitutes a capacitor between the gas after plate electrode and the ionization.Add alternating voltage between two plate electrodes, utilize discharging and recharging of capacitor, make high-frequency current flow through ionized gas in the fluorescent tube, make lamp luminescence, plate electrode need not outside emitting electrons.The shortcoming of this method is: because of electrode size is subjected to the restriction of fluorescent tube, the capacitance between electrode and gas is less, produce the required electric current of lamp luminescence, and the frequency that is added in interelectrode alternating voltage will be up to tens of to hundreds of megahertzes.Under high like this frequency, fluorescent tube can produce strong electromagnetic radiation, must fluorescent tube be shielded with transparent electric conducting material, and this is in difficult realization at present, and fluorescent tube is difficult for making.And under high like this frequency, the large power semiconductor device price that is used to produce high-frequency ac voltage is also very high, causes whole light fixture cost higher.
The objective of the invention is: on the superaudio frequency of 20-100 kilohertz, realize the no filament work of gas discharge lamp tube, the useful life of when reducing electromagnetic radiation and reducing production costs, improving fluorescent tube.
The present invention is designed to closed annular with fluorescent tube, and the light tube jacket of closed annular is on a FERRITE CORE.Its working method is: with a magnet exciting coil magnetic flux in the FERRITE CORE is changed earlier, in the closed ring type gas discharge lamp pipe, produce induced electric field, at this moment make the gas ionization in the closed ring type gas discharge lamp pipe again, will in the closed ring type gas discharge lamp pipe, form the induced current of annular, thereby make lamp luminescence.
The present invention does not need filament because be to make lamp luminescence by the annular induced current in the closed ring type gas discharge lamp pipe, so fluorescent tube is nonvolatil, useful life is extremely long.Simultaneously, because fluorescent tube is worked in silent-sound frequency range, electromagnetic radiation and manufacturing cost are also very low.
The present invention can be used to make the gas discharge type light fixtures such as fluorescent lamp, xenon lamp and sodium lamp of no filament.
Provide overall structure of the present invention below in conjunction with accompanying drawing: FERRITE CORE (2) passes closed ring type gas discharge lamp pipe (1) and magnet exciting coil (3) constitutes closed magnetic circuit, and magnet exciting coil (3) is connected with excitation control circuit (4).
Describe the details of a kind of non-filament gas discharge lamp that proposes according to the present invention and definite method of running parameter thereof in detail below in conjunction with accompanying drawing.
Closed ring type gas discharge lamp pipe (1) constitutes the garden tubular of sealing by the concentric garden shape glass tube of two different radiis, and the inwall of inner glass tube scribbles reflective material, to improve luminous efficiency.If the reflective material electric conducting material must be axially grooved in the reflecting coating upper edge, make it can not be closed, in order to avoid produce eddy current loss.The internal diameter of inner glass tube is slightly larger than the external diameter of FERRITE CORE (2).
In closed ring type gas discharge lamp pipe (1) inside, there are two starter electrodes (6) to be connected with starter control circuit (5).Starter control circuit (5) produces hundreds of volts high voltage and is added on the starter electrode (6) when starter, make the gas ionization in the closed ring type gas discharge lamp pipe (1).Behind the gas ionization, constant electric current of starter control circuit (5) output, by starter electrode (6) discharge, make closed ring type gas discharge lamp pipe (1) work a period of time, be diffused in the whole closed ring type gas discharge lamp pipe (1) until ionized gas.At this moment, induced electric field just can produce induced current and light fluorescent tube in closed ring type gas discharge lamp pipe (1).Subsequently, the output of starter control circuit (5) is in vacant state, in order to avoid influence closed ring type gas discharge lamp pipe (1) operate as normal.Be to improve the starter effect, two starter electrodes (6) are respectively near two bottom surfaces of garden tubular, and coat the material that is easy to emitting electrons on the surface of starter electrode (6).FERRITE CORE (2) selects for use eddy current loss and the little Ferrite Material of magnetic hysteresis loss to divide two sections to make, and one section makes U-shaped, and another section makes I shape.Closed ring type gas discharge lamp pipe (1) is enclosed within a side of U-shaped section, and magnet exciting coil (3) is enclosed within the opposite side of U-shaped section.U-shaped section and I shape section link together, and constitute closed magnetic circuit, and air gap is not stayed in the centre.But intersegmental the wanting of U-shaped section and I shape can be taken apart, so that install and change closed ring type gas discharge lamp pipe (1).
Magnet exciting coil (3) is connected with excitation control circuit (4), the AC excitation electric current of excitation control circuit (4) output flows through magnet exciting coil (3), produce alternating magnetic field in FERRITE CORE (2), the maximum magnetic induction value outline in the FERRITE CORE (2) is less than the full magnetic flux density value of closing of ferrite magnetic core material.
The frequency of exciting current is chosen between the 20-100 KHz.Frequency is high more, and the induced electric field intensity in the closed ring type gas discharge lamp pipe (1) is big more, and this can improve the interior power density of closed ring type gas discharge lamp pipe (1), reduces the volume of closed ring type gas discharge lamp pipe (1).But the loss meeting of FERRITE CORE (2) strengthens, and causes FERRITE CORE (2) heating.To under the not serious situation of FERRITE CORE (2) heating, improve operating frequency as far as possible according to the FERRITE CORE properties of materials during manufacturing.
Selecting the ferrite magnetic core material, after having determined the operating frequency and maximum magnetic induction value of FERRITE CORE (2), the sectional area of FERRITE CORE (2) is big more, induced electric field intensity in the closed ring type gas discharge lamp pipe (1) is also big more, but the volume of FERRITE CORE (2) and cost can raise.To determine the sectional area of FERRITE CORE (2) during manufacturing according to the normal luminous needed field minimum intensity level of closed ring type gas discharge lamp pipe (1).On the other hand, when making closed ring type gas discharge lamp pipe (1), choose the related parameter that has of the interior body of inflating of closed ring type gas discharge lamp pipe (1), manage to reduce the normal luminous needed electric field strength value of closed ring type gas discharge lamp pipe (1), to reduce the volume and the cost of FERRITE CORE (2).
Excitation control circuit (4), is exported a constant alternating voltage and is added on the magnet exciting coil (3) not before the starter at closed ring type gas discharge lamp pipe (1).Behind closed ring type gas discharge lamp pipe (1) starter, the reduced impedance that is reflected on the magnet exciting coil (3) reduces, the output current of excitation control circuit (4) strengthens, the output current of excitation control circuit this moment (4) can be limited on certain numerical value automatically, in order to avoid burn out closed ring type gas discharge lamp pipe (1).Cut-off current is determined closed ring type gas discharge lamp pipe (1) is pressed on the luminous required numerical value of rated power.
The shortcoming that closed ring type gas discharge lamp pipe (1) makes the garden tubular is: because of ionized gas is negative resistance property, cause the interior electric current distribution of closed ring type gas discharge lamp pipe (1) that inhomogeneous variation is arranged sometimes, cause the inhomogeneous variation of the interior brightness of closed ring type gas discharge lamp pipe (1), produce bright wisp rollover phenomenon (what influence is this phenomenon do not have to the use of fluorescent tube).The determine way of this phenomenon of elimination is the cross-sectional area that reduces the interior conductive section of closed ring type gas discharge lamp pipe (1).That closed ring type gas discharge lamp pipe (1) can be done is smaller for this reason.Mode closed after also can adopting glass tube around multi-turn is made closed ring type gas discharge lamp pipe (1), to reduce conductive section.Whole closed ring type gas discharge lamp pipe (1) will be with the long time because of ionized gas is diffused into for a kind of mode in back, and starting time can increase to some extent.
Claims (1)
1, a kind of by gas discharge lamp tube (1), FERRITE CORE (2), magnet exciting coil (3), the gaseous discharge lamp that excitation control circuit (4) is formed, it is characterized in that gas discharge lamp tube (1) is closed annular, gas discharge lamp tube (1) inside does not have filament, dawn is filled with the gas that can be excited to discharge, gas discharge lamp tube (1) gas inside constitutes the closed annular discharge loop along fluorescent tube, FERRITE CORE (2) is formed by two sections, one section is U-shaped, another section is an I shape, gas discharge lamp tube (1) is enclosed within a side of the U-shaped section of FERRITE CORE (2), magnet exciting coil (3) is enclosed within the opposite side of the U-shaped section of FERRITE CORE (2), the I shape section of the U-shaped section of FERRITE CORE (2) and FERRITE CORE (2) links together, constitute closed magnetic circuit, magnet exciting coil (3) is electrically connected with excitation control circuit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115774A CN1055349C (en) | 1996-05-08 | 1996-05-08 | Non-filament closed ring type gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115774A CN1055349C (en) | 1996-05-08 | 1996-05-08 | Non-filament closed ring type gas discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164755A CN1164755A (en) | 1997-11-12 |
| CN1055349C true CN1055349C (en) | 2000-08-09 |
Family
ID=5122992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96115774A Expired - Fee Related CN1055349C (en) | 1996-05-08 | 1996-05-08 | Non-filament closed ring type gas discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1055349C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006111054A1 (en) * | 2005-04-22 | 2006-10-26 | Jin Li | A magnetic energy bulb |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035915A (en) * | 1988-03-09 | 1989-09-27 | 菲利浦光灯制造公司 | Electrodeless low voltage discharge lamp |
| CN1080455A (en) * | 1992-06-22 | 1994-01-05 | 李斓 | Filamentless gas-conducted lamp |
-
1996
- 1996-05-08 CN CN96115774A patent/CN1055349C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035915A (en) * | 1988-03-09 | 1989-09-27 | 菲利浦光灯制造公司 | Electrodeless low voltage discharge lamp |
| CN1080455A (en) * | 1992-06-22 | 1994-01-05 | 李斓 | Filamentless gas-conducted lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006111054A1 (en) * | 2005-04-22 | 2006-10-26 | Jin Li | A magnetic energy bulb |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1164755A (en) | 1997-11-12 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |