CN201638788U

CN201638788U - Cold cathode fluorescent lamp structure

Info

Publication number: CN201638788U
Application number: CN2009202720980U
Authority: CN
Inventors: 徐世雄
Original assignee: POLAR ELECTRONICS CO Ltd
Current assignee: POLAR ELECTRONICS CO Ltd
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2010-11-17
Anticipated expiration: 2019-12-25

Abstract

The utility model provides a cold cathode fluorescent lamp structure, which comprises a sealed tube and two electrodes, wherein the two electrode are arranged at two ends of the sealed tube respectively; each electrode comprises an electrode part, a conducting wire and a glass cover body; the electrode part is connected with the conducting wire; and a hole is formed at the front end of the glass cover body for the conducting wire to pass through. A hollow tube is internally connected with and communicated with the front end of the glass cover body; a bent extending part is arranged at the tail end of the glass cover body, and is welded and fixed corresponding to the diameter of the sealed tube in a heating way, so that the electrode parts and the glass cover bodies are arranged in two ends of the seal tube; furthermore, the air is drawn out from the sealed tube through the outside ends of the hollow tubes, so as to form a vacuum state, so the cold cathode fluorescent lamp is completely manufactured.

Description

The cold-cathode tube structure

Technical field

The relevant a kind of cold-cathode tube structure of the utility model is meant especially and a kind ofly can effectively makes large-sized cold-cathode tube with the technical field as lighting device.

Background technology

At present, cold-cathode tube (Cold Cathode Fluorescent Lamp, CCFL) because tiny, simple in structure, the low temperature of fluorescent tube, high brightness, low consumption electric power and the life-span of lighting a lamp are long, so be widely used in backlights such as various LCD, laptop computer, mobile phone, scanner.As shown in Figure 1, be the cold-cathode tube of prior art, be applied to the back light of liquid crystal indicator, cold-cathode tube includes the sealed tube body 10 of a glass and is located at the electrode 12 of sealed tube body 10 2 ends.Wherein electrode 12 mainly comprises discharge part 14, lead 16 and junction surface, discharge part 14 is located at an end of lead 16, and the junction surface is a solid glass pearl 18, the mode that fuses by heating is adhered to the stage casing of lead 16, and bead 18 fused with sealed tube body 10 combine, so that electrode 12 is fixed in two ends of sealed tube body 10, allow discharge part 14 be positioned at sealed tube body 10 simultaneously, heat and discharge so that be filled in sealed tube body 10 inner inert gases or mercury (Hg) and be excited free and disengage ultraviolet light, and excite a fluorescence coating 20 of coating sealed tube body 10 inwalls, make fluorescence coating 20 disengage the long visible light of wavelength.

Because the fluorescent tube of cold-cathode tube is tiny, so only extensively use at present as back light, therefore if desire is used cold-cathode tube as lighting device, certainly will undersized cold-cathode tube to be converted to large-sized cold-cathode tube, with brightness demand in response to the high power illumination device.Yet, the sealed tube body 10 of glass is changed from small to big, bead 18 relative will the becoming with the size of sealed tube body 10 greatly of electrode 12, can need heating time more of a specified duration this moment because bead 18 volumes become big, could allow fuse driving fit between bead 18 and the sealed tube body 10.Only, in the process that heating fuses, often sealed tube body 10 has reached heat fusion joint, and bead 18 still presents cold state in the outer heat, can't reach heat fusion joint simultaneously with sealed tube body 10, make between bead 18 and the sealed tube body 10 and can difference different because of heat fusion joint and thermal coefficient of expansion the gap occur, cause the gas leak problem in the sealed tube body 10, cold-cathode tube only can limit to the disappearance of making tiny fluorescent tube and using as back light thus.

In view of this, the utility model is satisfied the disappearance at above-mentioned prior art, proposes a kind of cold-cathode tube structure, effectively to overcome these above-mentioned problems.

Summary of the invention

Main purpose of the present utility model is providing a kind of cold-cathode tube structure, and it is poor because of the thermal expansion coefficient difference adaptation that it can solve between sealed tube and the electrode, so that the problem that can't make the large scale cold-cathode tube in response to demand.

Another purpose of the present utility model is providing a kind of cold-cathode tube structure, and it utilizes the cold-cathode tube of no tungsten filament to replace traditional tungsten filament (white heat) bulb as lighting device, to reach the effect of carbon reduction.

In order to achieve the above object, the utility model provides a kind of cold-cathode tube structure, comprises a sealed tube and two electrodes, and sealed tube is provided with a luminescent layer in it, and two electrodes are arranged at two ends of sealed tube respectively.Wherein each electrode structure comprises electrode part, lead and cover glass, and electrode part has a hollow circular tube shape of a sealed end and an openend, and the sealing end connects lead, and the cover glass front end has a hole and is arranged in this two cover glass for lead.Cover glass front end and in interior connection one hollow tube, hollow tube is communicated with the front end of cover glass, and the end of cover glass has a bending extension, wherein bend outward as medial extremity, the two port that fuses mode and sealed tube with heating should be connected and fixed, make electrode part and cover glass be positioned at two ends of sealed tube, after electrode structure is connected in sealed tube, utilize the outboard end of hollow tube that the air drawn in the sealed tube is gone out, make it form a vacuum state, and the heating of the outboard end of hollow tube melted disconnected sealing, can finish the making of a cold-cathode tube.

The cold-cathode tube that the utility model utilization does not have tungsten filament replaces traditional tungsten filament (white heat) bulb as lighting device, can reach the effect of carbon reduction, further, can effectively make large-sized cold-cathode tube applying flexibly, and increase the practicality of cold-cathode tube and promote economic benefit in normal lighting.

Under illustrate in detail by specific embodiment, when the effect that is easier to understand the purpose of this utility model, technology contents, characteristics and is reached.

Description of drawings

Fig. 1 is the cutaway view of the cold-cathode tube of prior art;

Fig. 2 is a cutaway view of the present utility model;

Fig. 3 is the electrode amplification stereogram of cold-cathode tube of the present utility model.

Description of reference numerals

10 sealed tube bodies; 12 electrodes; 14 discharge parts; 16 leads; 18 beades; 20 fluorescence coatings; 22 cold-cathode tubes; 24 sealed tubes; 26 electrodes; 28 luminescent layers; 29 mercury; 30 leads; 32 electrode part; 322 sealed ends; 324 openends; 34 cover glass; 342 holes; 344 bending extensions; 36 hollow tubes.

Embodiment

See also Fig. 2, be cutaway view of the present utility model.Cold-cathode tube 22 comprises a sealed tube 24 and two electrodes 26, two electrodes 26 are arranged at two ends of sealed tube 24 respectively, wherein sealed tube 24 is not defined as oval cast attitude at this certainly with glass growth cylinder kenel, as spiral kenel, L kenel, U kenel or other any distortion kenels etc.Sealed tube 24 inwalls are coated with fluorescent material as a luminescent layer 28, sealed tube 24 more comprises mercury (Hg) 29, after electrode 26 receives a voltage, electrode 26 promptly heats discharge, mercury 29 is excited free and disengages ultraviolet light, and after luminescent layer 28 accepts the light of ultraviolet wavelength and excite, send the high brightness light.For further understanding two ends how electrode 26 is arranged at sealed tube 24, and the effect that can make the large scale cold-cathode tube, please cooperate Fig. 3 simultaneously, electrode amplification stereogram for cold-cathode tube, electrode 26 comprises lead 30, electrode part 32 and cover glass 34, wherein electrode part 32 is the hollow circular tube shape with sealed end 322 and openend 324, and sealed end 322 connects lead 30 with welding manner or mode of heating.The outward appearance of cover glass 34 is that a hollow is hung bell, and cover glass 34 front ends have a hole 342, and its aperture is slightly larger than the diameter of lead 30, is arranged in the cover glass 34 for lead 30, can utilize mode of heating to fuse fixing by hole 342 and lead 30.The front end of cover glass 34 and in interior connection one hollow tube 36, and hollow tube 36 communicates with the front end of cover glass 34, the end of cover glass 34 has a bending extension 344, wherein the end of cover glass 34 bends extension 344 outward as medial extremity, and fuse fixingly so that two side edge of mode of heating and sealed tube 24 are corresponding, make electrode part 32 and cover glass 34 be positioned at two ends of sealed tube 24.Because cover glass 34 is hung bell and slimming for hollow, therefore can be according to different size sealed tube 24, make the corresponding electrode 26 that is arranged at two sides of sealed tube 24, and the diameter and the thickness of glass of bending extension 344 are identical with the two side pipe mouth diameters and the tubulose thickness of sealed tube 24, in heating process, can allow sealed tube 24 and bending extension 344 reach heat fusion joint simultaneously and fast driving fit fix, the problem in gap appears because of heat fusion joint difference different and thermal coefficient of expansion between bead and the sealed tube body with effective solution prior art.Utilize the outboard end of hollow tube 36 that the air drawn in the sealed tube 24 is gone out again, make it form a vacuum state, utilize mode of heating that the outboard end of hollow tube 36 is melted disconnected sealing again, can finish the making of cold-cathode tube 22.Continue, the outboard end of lead 30 is connected a power supply, and transmit a voltage and give electrode part 32 and heat and discharge, cause luminescent layer 28 stimulated luminescences in the sealed tube 24.

Comprehensively above-mentioned, the cold-cathode tube that the utility model utilization does not have tungsten filament replaces traditional tungsten filament (white heat) bulb as lighting device, can reach the effect of carbon reduction, further, can effectively make large-sized cold-cathode tube applying flexibly, and increase the practicality of cold-cathode tube and promote economic benefit in normal lighting.

More than be illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall in the protection range of the present utility model all.

Claims

1. a cold-cathode tube structure is characterized in that, comprising:

One sealed tube is provided with a luminescent layer in it; And

Two electrodes are arranged at two ends of sealing pipe respectively, and each this electrode comprises:

One lead;

One electrode part has a hollow circular tube shape of a sealed end and an openend, and the sealing end connects this lead; And

One cover glass, its front end has a hole, this hole is arranged in this two cover glass for this lead, this cover glass front end and in interior connection one hollow tube, this hollow tube is communicated with the front end of this cover glass, the end of this cover glass has a bending extension, should be connected and fixed with the two port of sealing pipe, make this electrode part and this cover glass be positioned at two ends of sealing pipe, utilize the outboard end of this hollow tube that the air drawn in the sealing pipe is gone out again, make it form a vacuum state.

2. cold-cathode tube as claimed in claim 1 is characterized in that, this cover glass is the cover glass that a hollow is hung bell.

3. cold-cathode tube as claimed in claim 1 is characterized in that, this hole fuses fixing with mode of heating and this lead.

4. cold-cathode tube as claimed in claim 1 is characterized in that, this bending extension and the sealing pipe of this cover glass fuse fixing with mode of heating.

5. cold-cathode tube as claimed in claim 1 is characterized in that, the outboard end of this hollow tube utilizes mode of heating to melt disconnected sealing.

6. cold-cathode tube as claimed in claim 1 is characterized in that, sealing tubing matter is glass.

7. cold-cathode tube as claimed in claim 1 is characterized in that the outboard end of this lead connects a power supply, and transmit a voltage give this electrode part heat with the discharge, cause this luminescent layer stimulated luminescence.

8. cold-cathode tube as claimed in claim 1 is characterized in that, an oval cast attitude of sealing Guan Weiyi or a spiral kenel.