CN202165867U - Led lamp tube - Google Patents
Led lamp tube Download PDFInfo
- Publication number
- CN202165867U CN202165867U CN2011202345357U CN201120234535U CN202165867U CN 202165867 U CN202165867 U CN 202165867U CN 2011202345357 U CN2011202345357 U CN 2011202345357U CN 201120234535 U CN201120234535 U CN 201120234535U CN 202165867 U CN202165867 U CN 202165867U
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- constant
- fluorescent tube
- led
- led lamp
- power supply
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Abstract
The utility model discloses a LED lamp tube, comprising a lamp shade, a LED lamp strip, a heat radiator, a lamp head, wherein the lamp tube is surrounded by the lamp shade and the heat radiator, the LED lamp strip is arranged in the lamp tube, the lamp head is arranged on the end of the lamp tube; also comprising a constant-current driven circuit built in the LED lamp tube and connected with the LED lamp strip and also with an external power supply adapter by the lamp head, wherein the power supply adapter provides the wide-width direct-current working voltage in the range of 11-25V for the constant-current driven circuit. The working voltage of the built-in constant-current driven circuit is in the range of direct-current 11-25V and does not exceeds the human safety voltage 36V, thus the electric shock hidden trouble is eliminated. The capacitor of the built-in constant-current driven circuit uses a ceramic disk capacitor, thus the affect of the temperature on the driven circuit is eliminated. The lamp tube in operation is not affected by the voltage fluctuation at the wide-voltage working condition.
Description
Technical field
The utility model relates to a kind of LED lighting device, relates in particular to a kind of LED fluorescent tube of built-in power, belongs to technical field of lighting fixtures.
Background technology
LED fluorescent lamp is in the market divided into two types by the power supply placement location.A kind of is the mode of built-in power, is called for short built-inly, and being about to power circuit, partly to be placed on the LED fluorescent tube inner, and it can be converted into direct current with alternating current and supply with led light source, drives that it is luminous.A kind of in addition is the mode of external power supply, and it is independent to be about to the power circuit part, and it is outside to be placed on the LED fluorescent tube, and it can be converted into direct current with alternating current and supply with led light source equally, drives that it is luminous.For built-in LED fluorescent tube; Because of on-chip power; The heat dissipation design that is unfavorable for the LED fluorescent tube, power supply and LED can produce heat when work, and both interact; Particularly can have influence on the performance of light source and the life-span of power supply, make be difficult to reach more than 25000 hours the service life of entire product.And when the power unit of built-in LED fluorescent tube broke down, if maintenance then will be dismantled the LED lamp tube body, maintenance inconvenience and cost were not low yet, and then cost is too big if whole fluorescent tube is scrapped.For whole built-in LED fluorescent tube, because of directly importing High Level AC Voltage, the user exists the danger of electric shock.For external LED fluorescent tube, external because of power supply, the heat dissipation design of LED fluorescent tube is unaffected, has well eliminated heat that power supply and LED when work produce to separately adverse effect, and the performance of light source and the life-span of power supply are protected simultaneously.Compare the built-in power formula, maintenance and installation are all very convenient.But existing external LED fluorescent tube is combined by the LED connection in series-parallel of some, and operating voltage is generally low-voltage DC, need to be connected with external power supply through rectification circuit, and the external LED fluorescent tube that has does not even provide rectification circuit.For single led fluorescent tube, has no holding circuit, if the client is connected fluorescent tube accidentally with high-tension electricity; Or the external power supply that uses non-special outfit comes the driving LED fluorescent tube; Can badly influence the performance and the life-span of led light source, even damage, Danger Electric shock risk is more arranged.Therefore, this type of LED lamp need cooperate special-purpose power supply to use, and has limited the popularization and the standardization of LED fluorescent tube product like this, and certain limitation is arranged, and has reduced the convenient, flexible property that terminal client uses.
Summary of the invention
It is a kind of based on the external power supply basis that the purpose of the utility model is to provide, and safety coefficient is high, have defencive function, convenient for installation and maintenance, the Novel LED lamp tube that can supply terminal user to select for use flexibly.
The purpose of
the utility model is achieved through following technical scheme:
A kind of LED fluorescent tube comprises lampshade 1, LED lamp bar 2, radiator 3, lamp holder 4, and said lampshade 1 is enclosed fluorescent tube with radiator 3; LED lamp bar 2 is placed in one; Lamp holder 4 is positioned at the end of fluorescent tube, also comprises the constant-current drive circuit 5 that is built in the LED fluorescent tube, and LED lamp bar 2 is connected with constant-current drive circuit 5; Link to each other with the power supply adaptor 6 of outside via lamp holder 4, power supply adaptor 6 is provided at the wide cut direct-current working volts between 11～25V for constant-current drive circuit 5 again.
The purpose of the utility model can also further realize through following technical measures:
Aforesaid LED fluorescent tube, wherein constant-current drive circuit 5 is DC/DC Switching Power Supply or linear constant-current supply.
Aforesaid LED fluorescent tube, wherein constant-current drive circuit 5 adopts the ceramic disc capacitor element.
Aforesaid LED fluorescent tube, wherein LED lamp bar 2 combines through connection in series-parallel.
Aforesaid LED fluorescent tube, wherein radiator 3 is processed by aluminium section bar.
Compared with prior art, the beneficial effect of the utility model is: built-in constant-current drive circuit, operating voltage do not surpass human safety voltage 36V between direct current 11～25V, eliminated electric shock hidden danger.And all electric capacity of built-in constant-current drive circuit adopt ceramic disc capacitor, have eliminated the influence of temperature to drive circuit.Wide voltage power supply condition does not receive the influence of fluctuations of voltage when making lamp works.And terminal user is easy to use, can buy the external power supply adapter that satisfies the lamp works condition voluntarily.
Description of drawings
Fig. 1 is the utility model shape assumption diagram;
Fig. 2 is the utility model circuit structure diagram.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.As shown in Figure 1; The utility model comprises lampshade 1, LED lamp bar 2, aluminium section bar radiator 3, lamp holder 4, and said lampshade 1 is enclosed fluorescent tube with radiator 3, and LED lamp bar 2 is placed in one; Lamp holder 4 is positioned at the end of fluorescent tube; Also comprise the constant-current drive circuit 5 that is built in the LED fluorescent tube, as shown in Figure 2, LED lamp bar 2 is connected with constant-current drive circuit 5; Link to each other with the power supply adaptor 6 of outside via lamp holder 4, power supply adaptor 6 is provided at the wide cut direct-current working volts between 11～25V for constant-current drive circuit 5 again.Said constant-current drive circuit 5 employing ceramic disc capacitor elements are arranged on the same wiring board with LED lamp bar 2 or on the different module circuit board, the material of circuit board comprises FR4, CM-3, MCPCB, ceramic substrate, and other unlisted materials.
The LED fluorescent tube of the utility model is converted into the direct current between 11V～25V through external power supply adapter 6 with 85V～265V alternating current, passes through the constant-current drive circuit 5 of built-in wide voltage power supply again, 2 work of driving LED lamp bar.Power satisfy and input voltage under the condition between 11V～25V, constant-current drive circuit 5 has guaranteed the operating current of LED, condition of work does not receive outside civil power, and the influence of the voltage pulsation of adapter itself.And the ripple of the electric current through LED can be accomplished littler.Thereby the light output that has guaranteed the new LED fluorescent tube is stable, and stroboscopic almost is eliminated.Simultaneously if input voltage exceeds the scope of 11V～25V, then constant-current drive circuit 5 lost efficacy or shielded, and protecting the LED lamp bar 2 unlikely damages of back level, thereby had guaranteed the reliability of entire product.
Constant-current drive circuit 5 adopts DC/DC Switching Power Supply or linear constant flow module, and efficient can be accomplished more than 95%, and the efficient of power supply adaptor generally can both be accomplished more than 80%, thereby has guaranteed that whole system operation efficient has a high value.
The utility model LED pipe can directly be installed on the traditional fluorescent lamp support, is electrically connected with the city through the adapter that satisfies condition again.And adapter can be installed in the support of traditional fluorescent lamp through rational circuit repacking.During the utility model LED lamp works, need not ballast and starter.
Except that the foregoing description, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (5)
1. LED fluorescent tube; Comprise lampshade (1), LED lamp bar (2), radiator (3), lamp holder (4), said lampshade (1) and radiator (3) are enclosed fluorescent tube, and LED lamp bar (2) is placed in one; Lamp holder (4) is positioned at the end of fluorescent tube; It is characterized in that also comprise the constant-current drive circuit (5) that is built in the LED fluorescent tube, LED lamp bar (2) is connected with constant-current drive circuit (5); Link to each other with outside power supply adaptor (6) via lamp holder (4), power supply adaptor (6) is provided at the wide cut direct-current working volts between 11～25V for constant-current drive circuit (5) again.
2. LED fluorescent tube as claimed in claim 1 is characterized in that, said constant-current drive circuit (5) is DC/DC Switching Power Supply or linear constant-current supply.
3. LED fluorescent tube as claimed in claim 1 is characterized in that, said constant-current drive circuit (5) adopts the ceramic disc capacitor element.
4. LED fluorescent tube as claimed in claim 1 is characterized in that, said LED lamp bar (2) combines through connection in series-parallel.
5. LED fluorescent tube as claimed in claim 1 is characterized in that, said radiator (3) is processed by aluminium section bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202345357U CN202165867U (en) | 2011-07-05 | 2011-07-05 | Led lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202345357U CN202165867U (en) | 2011-07-05 | 2011-07-05 | Led lamp tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202165867U true CN202165867U (en) | 2012-03-14 |
Family
ID=45801690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202345357U Expired - Lifetime CN202165867U (en) | 2011-07-05 | 2011-07-05 | Led lamp tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202165867U (en) |
-
2011
- 2011-07-05 CN CN2011202345357U patent/CN202165867U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |