CN2692828Y

CN2692828Y - Electrodeless straight shape fluorescent lamp

Info

Publication number: CN2692828Y
Application number: CN 03255098
Authority: CN
Inventors: 蔡昭国
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-14
Filing date: 2003-08-14
Publication date: 2005-04-13
Anticipated expiration: 2013-08-14

Abstract

The utility model relates to a novel electrodeless straight shape fluorescent lamp, which belongs to the field of electric light sources. The electrodeless straight shape fluorescent lamp comprises an electrodeless straight shape fluorescent lamp tube and an electronic ballast. The electrodeless straight shape fluorescent lamp is characterized in that the electrodeless straight shape fluorescent lamp adopts a high borosilicate glass tube, and rare earth three primary color fluorescent powder of red, green and blue with the thickness of 0.1 mm is deposited on the inner wall of the tube. The discharging gas filled in the tube is the mercury mixture of Ne, Ar, and Xe (without mercury) or Ne, Ar, Kr and Xe according to specific proportion, both ends of the straight tube are sheathed with aluminum metal caps with the thickness of 0.1 mm and the length of 5 mm, and anaerobic resin adhesive with the thickness of 0.5 mm is coated at the bottom parts of the inner layers of the metal caps. The outer sides of both ends are respectively provided with metal shielding conducting wires with sheaths. The electronic ballast adopts two-electrode output in an AC220V /DC12V input mode, and the phase difference of the voltages of the two electrodes is 180 DEG. The electrodeless straight shape fluorescent lamp uses the mode that 1-40 lamps of each group are connected in parallel and are controlled in a group mode to match with the electronic ballast for use. The utility model emits light uniformly, the service life reaches 50000 hours, the preferred lamp tube without mercury solves radically the pollution problem of the mercury of the fluorescent lamp, and the utility model has important meaning for environmental protection.

Description

The straight type fluorescent lamp of new electrodeless

Technical field

This novel electrodeless straight type fluorescent lamp belongs to the electric light source field, is applied to backlight of LCD, LCD TV backlight source, scanner light source, advertisement, home-use ornamental color light source and daily life lighting source.

Background technology

Fluorescent lamp occurs, the existing one-hundred-year history that goes up of development, and it utilizes the electrode in the fluorescent tube that external electric energy is converted into the required energy of lamp works.Mercury in the fluorescent tube is as luminous carrier, though single consumption is little, because the extensive use of fluorescent lamp, quantity is huge, so caused the pollution of mercury to environment inevitably.Therefore press for and reduce the mercury consumption or replace it fully.What grow up is a kind of electrodeless fluorescent lamp thereupon, promptly electrodeless in the pipe.It is based on electromagnetic induction principle, produce the high-frequency and high-voltage alternating current by electric ballast and act on the AC magnetic field that fluorescent tube produces, in fluorescent tube, produce induced current, make the discharge gas discharge, give off the vacuum ultraviolet that wavelength is 253.7nm, be converted into visible light by fluorescent material.But electrodeless fluorescent lamp light source before this has one to be ground connection in two external electrodes.Like this, when applying voltage, can be by the power line of high-field electrode orientation by parasitic capacitance to external leakage, cause that near the grounding electrode field intensity and brightness falls too highly, cause electromagnetic radiation serious, and brightness irregularities.

The utility model content

In order to solve the problems referred to above that existing electrodeless fluorescent lamp pipe exists, the design of special proposition the utility model promptly all imposes square-wave voltage to two external electrodes, 180 ° of the two poles of the earth voltage phase differences, and this has just formed a uniform plasma column along tube's axis.Because of the conductance of plasma column is very high, so it is low as can to ignore that power line by glass-tube is leaked, has fundamentally solved the problem of electromagnetic radiation, and made and luminously become even.

The straight type fluorescent lamp of new electrodeless comprises electrodeless straight type fluorescent tube 1 and electric ballast 2, it is characterized in that electrodeless straight type fluorescent tube 1 adopts high borosilicate glass-tube 3, the thick rare-earth trichromatic of inside pipe wall deposition 0.1mm---rouge and powder (y ₂Gd) BO ₃: Eu, green powder ZnSiO ₄: Mn, blue powder BaMgAlO:Eu fluorescent material 4, the discharge gas that fills in the pipe is special ratios Ne, Ar, Xe (no mercury) or Ne, Ar, Xe low-pressure mercury vapour mixture 5, lamp tube ends is with the thick aluminum metal cap 6 of 0.1mm, the long 5mm of this metal cap, its internal layer bottom scribbles the thick anaerobic resin bonding agent of 0.5mm, the metallic shield lead of band sheath is equipped with in the outside, two ends respectively, electric ballast 2 is with the AC220V/DC12V input mode, adopt bipolar output, and the two poles of the earth voltage phase difference is 180 °, output waveform is a square wave, and electrodeless straight type fluorescent tube 1 props up team control mode in parallel and the supporting use of electric ballast with every group of 1-40.

Said electric ballast unit module circuit, source current are imported bridge-jointing unit 9 successively by EMI transition element 7, high frequency oscillation unit 8 has power factor (PF) correcting unit 10, and output unit 11 boosts, make the output of electric ballast the two poles of the earth high-frequency and high-voltages, and 180 ° of the two poles of the earth voltage phase differences.

The utlity model has following advantage:

1, the luminous uniformity of surface of the light tube reaches more than 98%;

2, lamp reaches 50000 hours useful life;

3, not need through any processing be the electromagnetic radiation that the maskable higher-order of oscillation produces to surface of the light tube;

4, the novel mercury-free that optimizes is electrodeless, and straight type fluorescent lamp has solved the pollution problem of mercury from the source, even its mercury content of mercurous fluorescent tube also only is 50% of an existing product.

5, the High Power Factor of electric ballast and low harmonics distortion.

Description of drawings

Accompanying drawing 1 the utility model constitutes schematic diagram.

Accompanying drawing 2 the utility model circuit of electronic ballast schematic diagrames.

Embodiment

Now 1 further specify the utility model and how to implement in conjunction with the accompanying drawings: the effect of metal cap 6 that is enclosed within fluorescent tube 1 two ends is as the primary coil of transformer, and closed fluorescent tube is as the secondary coil of transformer.Electric ballast 2 can be installed separately with fluorescent tube 1 as required, and distance is a 0-15 rice.After the energized, electric ballast 2 can produce the alternating current of 30-270KHZ, thereby produce AC magnetic field at region of discharge, according to Faraday's electromagnetic induction law, the magnetic field that changes produces induced current in fluorescent tube 1, thereby make the mixed vapour 5 of inert gas and low-pressure mercury produce discharge, the width of cloth penetrates ultraviolet ray, is converted into visible light by the fluorescent material 4 that is deposited on tube inner wall again; Because electric ballast 2 is bipolar output, the two poles of the earth voltage phase difference is 180 °, and the power line that capacitive coupling is produced is horizontal distribution along the fluorescent tube axis, and tight closure.

Existing 2 unit module and conspiracy relations that further specify the utility model electric ballast in conjunction with the accompanying drawings:

Electric current is pressed direction shown in the accompanying drawing 2, successively by EMI transition element 7, input bridge-jointing unit 9, high frequency oscillation unit 8, passive power factor corrective unit 10, output unit 11 boosts, synergy by each functional module, realize the high-frequency and high-voltage output of electric ballast the two poles of the earth, and 180 ° of the two poles of the earth voltage phase differences, guarantee the high power factor and the low harmonic content output of electric ballast.

A kind of electrodeless fluorescent lamp, electrodeless in the pipe, based on electromagnetic induction principle, electric ballast is with the AC220V/DC12V input mode, bipolar output, 180 ° of the two poles of the earth voltage phase differences, output waveform are square wave, form the high conductivity uniform plasma scapus along tube's axis, so the induced current that produces in fluorescent tube discharges through discharge gas, the width of cloth penetrates vacuum ultraviolet, and the visible light that is converted into by fluorescent material has high luminosity uniformly, and does not have electromagnetic radiation.

Claims

1, the straight type fluorescent lamp of new electrodeless, comprise electrodeless straight type fluorescent tube (1) and electric ballast (2), it is characterized in that electrodeless straight type fluorescent tube (1) adopts high borosilicate glass-tube (3), the thick rare-earth trichromatic of inside pipe wall deposition 0.1mm---rouge and powder (y ₂Gd) BO ₃: Eu, green powder ZnSiO ₄: Mn, blue powder BaMgAlO:Eu fluorescent material (4), the discharge gas that fills in the pipe is special ratios Ne, Ar, Xe (no mercury) or Ne, Ar, Xe low-pressure mercury vapour mixture (5), lamp tube ends is with the thick aluminum metal cap (6) of 0.1mm, the long 5mm of this metal cap, its internal layer bottom scribbles the thick anaerobic resin bonding agent of 0.5mm, the metallic shield lead of band sheath is equipped with in the outside, two ends respectively, electric ballast (2) is with the AC220V/DC12V input mode, adopt bipolar output, and the two poles of the earth voltage phase difference is 180 °, output waveform is a square wave, and electrodeless straight type fluorescent tube (1) props up team control mode in parallel and the supporting use of electric ballast with every group of 1-40.

2, the straight type fluorescent lamp of new electrodeless as claimed in claim 1, it is characterized in that said electric ballast unit module circuit, source current is successively by EMI transition element (7), input bridge-jointing unit (9), high frequency oscillation unit (8) has power factor (PF) correcting unit (10), the output unit that boosts (11), make the output of electric ballast the two poles of the earth high-frequency and high-voltages, and 180 ° of the two poles of the earth voltage phase differences.