CN102518972A

CN102518972A - LED (Light Emitting Diode) lamp tube

Info

Publication number: CN102518972A
Application number: CN2011104611104A
Authority: CN
Inventors: 潘韵松
Original assignee: SEEWILL OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: SEEWILL OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-06-27

Abstract

The invention discloses an LED (Light Emitting Diode) lamp tube, which comprises a glass tube, lamp caps arranged at two ends of the glass tube as well as an LED lamp strip arranged in the glass tube, wherein the inner wall of the glass tube is coated with a light increasing and heat radiating film; and the LED lamp strip is fixedly adhered to the inner wall of the glass tube through a high heat conduction bonding adhesive. The light increasing and heat radiating film is an aluminum-coated layer, or a frosted heat conduction light increasing adhesive layer or a nano adhesive layer capable of increasing light and radiating heat. The LED lamp strip comprises a substrate, wherein a plurality of LED light sources are welded on the substrate, or an integrated light source consisting of an LED chip is packaged on the substrate; and a driving power supply module is also arranged on the LED lamp strip. According to the LED lamp tube disclosed by the invention, the light emitting efficiency, the light emitting angle and the illumination area of the LED lamp tube are increased; the problems of glare and point light existing in the LED lamp tube are solved; heat generated by an LED is transmitted to the whole glass tube through the substrate of the LED, so that the heat radiating area is greatly increased and the heat increasing speed of the LED lamp tube is increased; the LED lamp tube can be applied to a lamp holder of a traditional fluorescent lamp, and thus the generality of the LED lamp tube is greatly improved; and the replacement and use costs are reduced.

Description

The LED fluorescent tube

Technical field

The present invention relates to a kind of LED fluorescent tube.

Background technology

Fluorescent lamp is the lighting that people use always; Traditional fluorescent lamp can be filled with fluorescent material, wherein contains multiple poisonous heavy metal, and is very big to human body and ecological environment harm when making and use; The power consumption of fluorescent lamp is short big and service life in addition, often can not satisfy people's user demand; In the market, traditional fluorescent lamp is eliminated gradually, is replaced by the LED fluorescent tube, compares with traditional fluorescent lamp, and LED fluorescent tube power consumption is low, and the life-span is long.

At present, because the LED caloric value is big, known LED fluorescent tube is for solving its heat dissipation problem, and basic structure is that LED is fixed on the circuit board, and when LED was luminous, the heat of generation was delivered on the lamp housing through circuit board, was distributed by lamp housing again.A kind of novel light-emitting diode fluorescent lamp was disclosed on October 29th, 2008 like Chinese patent document number CN 201141526; Its structure is a plurality of LED lamps by aluminium base or the printed circuit board (PCB) welding set LED of formation lamp plate in aggregates; And the LED lamp plate is inserted on two side bayonet slots of plastics mould bar that the cross section is semicircle or large semicircle or stretching aluminium alloy heat radiation mould bar; Form the lamp plate assembly, control circuit board is isolated through the fibrous insulation sheet and is close to LED lamp plate below, and the Tibetan is located at plastics mould bar or stretching aluminium alloy heat radiation mould bar is inner; The lamp plate assembly is inserted in the glass lamp, utilizes the final LED of formation of crown top of burner encapsulation fluorescent lamp at two ends.

LED fluorescent tube pipe structure has two kinds on the market at present: a kind of is the plastics lamp housings, and the lamp housing front is a transparent surface, the inner card device, circuit board, and when LED was luminous, heat then passed to lamp housing through circuit board, was distributed by lamp housing again; A kind of in addition is that aluminium section bar structure and upper casing are formed for light-passing plastic tubing by drain pan then, and circuit board is installed on the aluminium, and the heat that produces when LED is luminous then is delivered on the drain pan aluminium section bar, is distributed heat by aluminium again.

Wherein first kind is adopted the all-plastic pipe, and radiating effect is poor, and translucent effect is bad; Second kind of lamp housing, though good heat dissipation effect, its cost is high, and the light absorption of upper casing plastic pipe is strong, the printing opacity rate variance.

Summary of the invention

The object of the invention aims to provide a kind of simple in structure, good heat dissipation effect, low cost of manufacture, led light source is luminous, light extraction efficiency is high, lighting effect is good LED fluorescent tube, to overcome weak point of the prior art.

A kind of LED fluorescent tube by this purpose design; Comprise glass tube, the LED lamp bar that is arranged on the lamp holder at its two ends and sets within it; Its architectural feature is that the inwall of glass tube is coated with the heat dissipation film that adds lustre to, and LED lamp bar is adhesively fixed on the inwall of glass tube through high heat conduction bonded adhesives.

The said heat dissipation film that adds lustre to is aluminium coated or frosted shape heat conduction adding lustre to glue-line, can the add lustre to nanometer glue-line of heat radiation maybe.

Said LED lamp bar comprises that one is adhesively fixed on the substrate on the glass tube, is welded with several parallel connections or LED coupled in series light source on the substrate, perhaps, is packaged with the integrated optical source that constitutes through several parallel connections or LED coupled in series chip on the substrate.

But also be provided with driving LED light source or the luminous driving power module of led chip on the said LED lamp bar.

Said driving power module is electrically connected with lamp holder through the lead that is provided with on the substrate.

Said LED lamp bar is one-part form or segmented.

The present invention compared with prior art has the following advantages:

1) the present invention adopts integrated glass tube, and glass tube is higher than the light transmittance and the refractive index of conventional PC pipe, has improved the light extraction efficiency of LED fluorescent tube greatly, increases more than 5% than the PC pipe brightness of routine;

2) on the inwall of glass tube, be coated with one deck heat dissipation film that adds lustre to, it is aluminium coated, frosted shape heat conduction adding lustre to glue-line or the nanometer glue-line that the heat sinking function that adds lustre to is arranged.It not only strengthens the mixed light effect of LED fluorescent tube, and solves the dazzle of LED fluorescent tube existence and the problem of some light, can improve the heat conduction speed of glass light simultaneously, helps the LED heat radiation;

3) LED lamp bar is adhesively fixed on the glass tube through high heat conduction bonded adhesives, and the heat that LED produced is delivered on the whole piece glass lamp through its substrate, increases considerably area of dissipation, improves the radiating rate of LED fluorescent tube;

4) installing drive power module on the substrate of LED lamp bar makes the lamp socket of LED fluorescent tube applicable to traditional fluorescent lamp, need not external power supply again, increases its versatility greatly, and reduce change, use cost;

5) LED lamp bar is fixed on the inwall of glass tube, but all bright dippings of whole piece glass tube make the whole rising angle of LED fluorescent tube big, and irradiated area is big.

Description of drawings

The general assembly structural representation of Fig. 1 one embodiment of the invention.

Fig. 2 is the sectional view of Fig. 1.

Fig. 3 is the assembly structure sketch map of one embodiment of the invention LED lamp bar and lamp holder.

Fig. 4 is the assembly structure sketch map of further embodiment of this invention LED lamp bar and lamp holder.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

First embodiment

Referring to Fig. 1-Fig. 3, this LED fluorescent tube comprises glass tube 1; Be arranged on the lamp holder 8 at its two ends; With the LED lamp bar that sets within it, the inwall of its glass tube 1 is coated with the heat dissipation film 2 that adds lustre to, and LED lamp bar is adhesively fixed on the inwall of glass tube 1 through high heat conduction bonded adhesives 6.Add lustre to heat dissipation film 2 for aluminium coated or frosted shape heat conduction adding lustre to glue-line, can the add lustre to nanometer glue-line of heat radiation maybe.LED lamp bar comprises that one is adhesively fixed on the substrate 3 on the glass tube 1, is welded with the led light source 4 that several parallel connections (or series connection) connect on the substrate 3, and said led light source 4 is a light emitting diode, and its pin 7 is welded on the pad 10 of substrate 3 through Xi Si or tin cream.But also be provided with the luminous driving power module 5 of driving LED light source 4 or led chip 11 on the LED lamp bar.Driving power module 5 is electrically connected with lamp holder 8 through the lead 9 of welding on the pad 10 of substrate 3.Lamp holder 8 external 220V alternating currents, the 220V alternating current is received on the driving power module 5, transfers the 220V alternating current to low-voltage DC; Led light source 4 is given in power supply again; Make it luminous, make its lamp socket, need not external power supply again applicable to traditional fluorescent lamp; Increase its versatility greatly, and reduce replacing, use cost.

Substrate 3 is a metal substrate, and metals such as available aluminium or copper are made the spontaneous curing under normal temperature condition of high heat conduction bonded adhesives 6; And make substrate 3 bonding firm with glass tube 1; The heat that the heat dissipation film 2 that adds lustre on the glass tube 1 is produced when making the work of LED lamp bar is delivered to whole piece glass tube 1 rapidly, dispels the heat, and strengthens the mixed light effect of LED fluorescent tube; And solve the dazzle of LED fluorescent tube existence and the problem of some light, improve light emission rate simultaneously.

The LED lamp bar of present embodiment is a segmented; Be divided into for about two sections; Two sections LED lamp bars are separately positioned on the right and left of glass tube 1; The lamp holder 8 at glass tube 1 two ends can reduce the load current of driving power module 5 separately to two sections LED lamp bar power supplies, reduces the cost of manufacture of required driving power module 5.

Said LED lamp bar also can adopt one-part form, and its need one side lamp head power supply gets final product, and is applicable to the LED fluorescent tube that low brightness of illumination needs.

Second embodiment

Referring to Fig. 4, this LED fluorescent tube is to be packaged with on the substrate 3 of said LED lamp bar the integrated optical source of led chip 11 formations that are connected through several parallel connections (or series connection) with the main distinction of first embodiment.Led chip 11 is electrically connected on the energising pad 10 of substrate 3 through metal wire 13; In the light-emitting area 12 that substrate 3 corresponding led chips 11 are provided with, be filled with fluorescent material glue-line 14; Fluorescent material glue-line 14 covers on the led chip 11; And wrap metal wire 13, driving power module 5 can make led chip 11 luminous to led chip 11 power supplies.Other do not state part, with first embodiment, no longer repeat.

Claims

1. LED fluorescent tube; Comprise glass tube (1), be arranged on the lamp holder (8) at its two ends and the LED lamp bar that sets within it; The inwall that it is characterized in that glass tube (1) is coated with the heat dissipation film (2) that adds lustre to, and LED lamp bar is adhesively fixed on the inwall of glass tube (1) through high heat conduction bonded adhesives (6).

2. LED fluorescent tube according to claim 1, it is characterized in that the said heat dissipation film that adds lustre to (2) for aluminium coated or frosted shape heat conduction adding lustre to glue-line, can the add lustre to nanometer glue-line of heat radiation maybe.

3. LED fluorescent tube according to claim 1 and 2; It is characterized in that said LED lamp bar comprises that one is adhesively fixed on the substrate (3) on the glass tube (1); Be welded with several parallel connections or LED coupled in series light source (4) on the substrate (3); Perhaps, be packaged with the integrated optical source that constitutes through several parallel connections or LED coupled in series chip (11) on the substrate (3).

4. LED fluorescent tube according to claim 3, but it is characterized in that also being provided with on the said LED lamp bar driving LED light source (4) or the luminous driving power module (5) of led chip (11).

5. LED fluorescent tube according to claim 4 is characterized in that said driving power module (5) goes up the lead (9) that is provided with through substrate (3) and is electrically connected with lamp holder (8).

6. LED fluorescent tube according to claim 5 is characterized in that said LED lamp bar is one-part form or segmented.