CN2599738Y - Cold-cathode lamp tube and back light module - Google Patents
Cold-cathode lamp tube and back light module Download PDFInfo
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- CN2599738Y CN2599738Y CNU032037473U CN03203747U CN2599738Y CN 2599738 Y CN2599738 Y CN 2599738Y CN U032037473 U CNU032037473 U CN U032037473U CN 03203747 U CN03203747 U CN 03203747U CN 2599738 Y CN2599738 Y CN 2599738Y
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- fluorescent tube
- cold cathode
- those
- backlight module
- tube
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Abstract
The utility model relates to a cold cathode lighting tube and a backlight module; the cold cathode lighting tube consists of an external lighting tube, a plurality of internal lighting tubes, a visible light luminous layer and a plurality of electrode groups; wherein the internal lighting tube is arranged in the external lighting tube; and the internal lighting tube is provided with the induced gas; the visible light luminous layer is arranged on an inner wall of the internal lighting tube; the electrode group is arranged on the both ends of the internal lighting tube, which extends outward the external lighting tube from the inside of the internal lighting tube; the brilliance is raised by arranging a plurality of internal lighting tubes; the lighting tube is not easy to be broken because of the coverage of the external lighting tube outside the internal lighting tube. In addition, the utility model also provides the backlight module, mainly comprising a light guiding plate and the cold cathode lighting tube.
Description
Technical field
The utility model relates to a kind of cold cathode fluorescent lamp (Cold Cathode FluorescenceLamp, CCFL) and backlight module (Back Light Module), and particularly relevant for a kind of cold cathode fluorescent lamp and backlight module that high brightness (brightness) can be provided.
Background technology
At improving rapidly of multimedia society, be indebted to the tremendous progress of semiconductor element or man-machine display device mostly.With regard to display, (Cathode Ray Tube CRT) because of having excellent display quality and its economy, monopolizes monitor market in recent years to cathode ray tube always.Yet, operate the environment of most terminating machine/display equipments on the table for the individual, or with the incision of the viewpoint of environmental protection, if predicted with the trend of saving the energy, cathode ray tube is because of still existing a lot of problems in space utilization and the energy resource consumption, and can't effectively provide solution for the demand of light, thin, short, little and low consumpting power.Therefore, have that high image quality, space utilization efficient add, (Liquid Crystal Display LCD) becomes the main flow in market to the LCD of low consumpting power, advantageous characteristic such as radiationless gradually.
It should be noted that; because liquid crystal molecule itself can't be luminous; so must provide liquid crystal panel required area source by backlight module; make liquid crystal panel reach the effect of demonstration; obtain enough brightness and contrast simultaneously; and employed light source is generally a cold cathode fluorescent lamp in the backlight module, and the briliancy that the briliancy of cold cathode fluorescent lamp can directly have influence on backlight module usually presents.
Fig. 1 is the structural representation of known a kind of cold cathode fluorescent lamp.Please refer to shown in Figure 1ly, cold cathode fluorescent lamp 100 is made of a fluorescent tube 110 1 fluorescence coatings 120 and an electrode group 130.Wherein, fluorescence coating 120 is coated on the inwall of fluorescent tube 110, and electrode group 130 comprises an anode and a negative electrode, this electrode group 130 is disposed at the two ends of fluorescent tube 110, and electrically connect with a power supply (figure do not show), in addition, inject suitable mercury vapour 140 and inert gases 150 in the fluorescent tube 110.When electrode group 130 is electrically connected to a bias voltage, mercury vapour 140 promptly is excited to excite state (excited state), return ground state (steady state) immediately, and when mercury vapour 140 is got back to ground state, can give off energy with the form of emitting ultraviolet light.By above-mentioned mechanism, when the ultraviolet light of being emitted when mercury vapour 140 is beaten fluorescence coating 120 on the tube wall of fluorescent tube 110, can send visible light, and then reach luminous purpose.
Yet, in design in order to improve the briliancy of cold cathode fluorescent lamp, usually can be with the design of the caliber of cold cathode fluorescent lamp very little, but caliber is more little, external force ruptures fluorescent tube because of being subjected to improperly with regard to easy.Therefore, for fear of the phenomenon of this fracture, known technology proposes another kind of cold cathode fluorescent lamp.
Fig. 2 is the structural representation of the cold cathode fluorescent lamp of known a kind of double-layer tube wall.Please refer to Fig. 2, cold cathode fluorescent lamp 200 is made of outer fluorescent tube 210, one an interior fluorescent tube 220, a fluorescence coating 230 and an electrode group 240.Wherein, interior fluorescent tube 220 is disposed in the outer fluorescent tube 210, and is injected with suitable mercury vapour and inert gas in the interior fluorescent tube 220.Fluorescence coating 230 is coated on the inwall of interior fluorescent tube 220.Electrode group 240 comprises an anode and a negative electrode, the two ends of fluorescent tube 220 in this electrode group 240 is disposed at, and extend to the outside of outer fluorescent tube 210 by the inside of interior fluorescent tube 220, this electrode group 240 is suitable for and a power supply (figure does not show) electric connection.The luminous principle of cold cathode fluorescent lamp 200 just repeats no more at this in last explanation.
It should be noted that cold cathode fluorescent lamp 200 coats interior fluorescent tube 220 by outer fluorescent tube 210, make the minimum interior fluorescent tube 220 of caliber can be subjected to the protection of outer fluorescent tube 210, external force causes interior fluorescent tube 220 fractures because of being subjected to improperly to avoid.Yet this kind cold cathode fluorescent lamp 200 can avoid the situation that ruptures to take place, and also can only increase the brightness of surface of the light tube by improving the mode of tube current but will further increase briliancy again, and this mode for briliancy promote still very limited.In addition, the raising of tube current will make the power of fluorescent tube consumption greatly promote, and also can shorten significantly the useful life of fluorescent tube simultaneously.
The utility model content
Therefore, the purpose of this utility model is providing a kind of cold cathode fluorescent lamp exactly, and they are a plurality of in order to the interior fluorescent tube of light source to be provided by configuration in the fluorescent tube outside, with the briliancy and the adjustable scope of briliancy of increase fluorescent tube, and the useful life of prolonging lamp tube.
Another purpose of the present utility model provides a kind of cold cathode fluorescent lamp, and it coats a plurality of in order to fluorescent tube in the interior fluorescent tube that light source is provided by an outer fluorescent tube, makes the bulk strength of fluorescent tube strengthen, and difficult external force ruptures because of being subjected to improperly.
Another purpose of the present utility model provides a kind of backlight module, and the area source that it can provide a high brightness makes LCD have high brightness, high-resolution display capabilities.
Based on above-mentioned purpose, the utility model proposes a kind of cold cathode fluorescent lamp, this cold cathode fluorescent lamp is made up of an outer fluorescent tube, a plurality of interior fluorescent tube, a visible light luminescent layer and a plurality of electrode group.Wherein, fluorescent tube is disposed in the outer fluorescent tube in a plurality of, and the interior tool one of fluorescent tube brings out gas in each, the visible light luminescent layer is disposed on the inwall of fluorescent tube in each, and each electrode assembly places the two ends of fluorescent tube in each, and each electrode group is the outside that is extended to outer fluorescent tube by the inside of fluorescent tube in each.
Based on above-mentioned purpose, the utility model proposes a kind of backlight module, be suitable for providing an area source, this backlight module is made of a light guide plate and a cold cathode fluorescent lamp.Light guide plate has an end face, a bottom surface and at least one side, cold cathode fluorescent lamp is disposed at by the side of light guide plate, and the light that cold cathode fluorescent lamp provided can be incident in the light guide plate by the side of light guide plate, and through being passed to the end face outgoing of light guide plate behind the bottom surface of light guide plate.Cold cathode fluorescent lamp is made up of an outer fluorescent tube, a plurality of interior fluorescent tube, a visible light luminescent layer and a plurality of electrode group.Wherein, fluorescent tube is disposed in the outer fluorescent tube in a plurality of, and the interior tool one of fluorescent tube brings out gas in each, the visible light luminescent layer is disposed on the inwall of fluorescent tube in each, and each electrode assembly places the two ends of fluorescent tube in each, and each electrode group is the outside that is extended to outer fluorescent tube by the inside of fluorescent tube in each.
In the preferred embodiment of the present utility model, above-mentioned inducing gas style is as being a mercury vapour and an inert gas; The visible light luminescent layer for example is a fluorescence coating.The material of outer fluorescent tube and interior fluorescent tube for example is a glass, and the space between outer fluorescent tube and the interior fluorescent tube for example is a vacuum state or is injected with an inert gas; And the electrode group is for example constituted by an anode and a negative electrode.
In the preferred embodiment of the present utility model, light guide plate for example is a wedge shape light guide plate, and for the briliancy of promoting backlight module presents, can dispose a diffusion sheet and a brightening piece on the exiting surface of light guide plate.In addition, in order to promote the light utilization ratio in the backlight module, for example in the other configuration of cold cathode fluorescent lamp one reflector, to cover this cold cathode fluorescent lamp, the light that cold cathode fluorescent lamp is sent is concentrated the direction irradiation towards the side of light guide plate.
Description of drawings
Fig. 1 is the structural representation of known a kind of cold cathode fluorescent lamp;
Fig. 2 is the structural representation of known another kind of cold cathode fluorescent lamp;
Fig. 3 is the structural representation according to the cold cathode fluorescent lamp of the utility model one preferred embodiment; And
Fig. 4 is that the cold cathode fluorescent lamp of the utility model one preferred embodiment applies to the schematic diagram in the backlight module.
100: cold cathode fluorescent lamp
110: fluorescent tube
120: fluorescence coating
130: the electrode group
140: mercury vapour
150: inert gas
200: cold cathode fluorescent lamp
210: outer fluorescent tube
220: interior fluorescent tube
230: fluorescence coating
240: the electrode group
250: mercury vapour
260: inert gas
300: cold cathode fluorescent lamp
310: outer fluorescent tube
320: interior fluorescent tube
330: the visible light luminescent layer
340: the electrode group
350: bring out gas
350a: mercury vapour
350b: inert gas
360: the visible light luminescent layer
400: backlight module
410: light guide plate
412: end face
414: the bottom surface
416: the side
420: reflector
430: diffusion sheet
440: brightening piece
Embodiment
Under with the condition of single fluorescent tube as light source, if will promote the briliancy of cold cathode fluorescent lamp, the caliber of cold cathode fluorescent lamp must be dwindled, but the cold cathode fluorescent lamp of caliber after dwindling is easy to fracture when being subjected to the external force collision again, and caliber dwindles for the lifting of briliancy still very limited.Hence one can see that, if will significantly increase the briliancy of light source the time, certainly will will adopt the framework of many fluorescent tubes, but not only volume is bigger for many fluorescent tubes, and comparatively time-consuming in the assembling.Therefore, this preferred embodiment just proposes a kind ofly to take into account fluorescent tube intensity, briliancy, briliancy adjustable range simultaneously, and the cold cathode fluorescent lamp of miniaturization.
Fig. 3 is the structural representation according to the cold cathode fluorescent lamp of the utility model one preferred embodiment.Please refer to shown in Figure 3ly, cold cathode fluorescent lamp 300 is made up of an outer fluorescent tube 310, two interior fluorescent tubes 320, a visible light luminescent layer 330 and two electrode groups 340.Wherein, two interior fluorescent tubes 320 are disposed in the outer fluorescent tube 310, and inject one in each in fluorescent tube 320 and bring out gas 350, and this brings out gas 350 for example is a mercury vapour 350a and an inert gas 350b.Visible light luminescent layer 360 is coated on the inwall of fluorescent tube 320 in each, and this visible light luminescent layer 360 for example is a fluorescence coating.Electrode group 340 is made of an anode and a negative electrode, and each electrode group 340 correspondence is disposed at the two ends of fluorescent tube 320 in each, and each electrode group 340 is the outsides that extended to outer fluorescent tube 310 by the inside of fluorescent tube in each 320, and electrically connect with a power supply (figure do not show), certainly, also can be connected on an electric wire or the conduction material, make electrode group 340 and power supply be more convenient for electrically connecting in electrode group 340 ends.In addition, outer fluorescent tube 310 is a glass for example with the material of interior fluorescent tube 320, and the space between outer fluorescent tube 310 and the interior fluorescent tube 320 for example is a vacuum state, or is injected with an inert gas.
When electrode group 340 is electrically connected to a bias voltage, bring out gas 350 and promptly be excited to excite state (excited state), return ground state immediately, and get back to ground state simultaneously bringing out gas 350, can give off energy with the form of emitting ultraviolet light.By above-mentioned mechanism, make visible light luminescent layer 360 on the tube wall of fluorescent tube 110 when bringing out ultraviolet light that gas 350 emitted, can send visible light, and then reach luminous purpose.
It should be noted that, because cold cathode fluorescent lamp 300 of the present utility model is to dispose two in order to the interior fluorescent tube 320 of light source to be provided in outer fluorescent tube 310, so the briliancy that fluorescent tube provided will be the twice of the briliancy of known cold cathode fluorescent lamp, and the adjustable scope of briliancy also increases thereupon.In addition,, satisfying under the demand of high briliancy, more can prolong the useful life of cold cathode fluorescent lamp 300 owing to use two interior fluorescent tubes 320.Certainly, the utility model is the example explanation to dispose two interior fluorescent tubes 320 only in the fluorescent tube 310 outside, but and can only dispose two interior fluorescent tubes 320 in the non-limiting outer fluorescent tube 310 of the present utility model, anyly be familiar with this skill person and should know, the utility model can be complied with required briliancy and briliancy adjusting range, adjusts the interior fluorescent tube quantity that is configured in the outer fluorescent tube.
From the above, cold cathode lamp piping of the present utility model can be used in the backlight liquid crystal display module.Fig. 4 is that the cold cathode fluorescent lamp of the utility model one preferred embodiment applies to the schematic diagram in the backlight module.Please consult Fig. 3 and shown in Figure 4 simultaneously, backlight module 400 is suitable for providing an area source, and this backlight module 400 is made of a light guide plate 410, a cold cathode fluorescent lamp 300, a reflector 420, a diffusion sheet 430 and a brightening piece 440.Wherein, light guide plate 410 for example is a wedge shape light guide plate, and light guide plate 410 has an end face 412, a bottom surface 414 and a side 416.The end face 412 of light guide plate 410 for example is designed to exiting surface, and the bottom surface 414 of light guide plate 410 for example is to be designed to scattering surface, and the side 416 of light guide plate 410 for example is to be designed to incidence surface.
Cold cathode fluorescent lamp 300 is disposed at 416 sides, side of light guide plate 410, and the light that cold cathode fluorescent lamp 300 is provided can be incident to by the side 416 of light guide plate 410 in the light guide plate 410, and after the scattering and reflection of the bottom surface 414 of process light guide plate 410, be passed to end face 412 outgoing of light guide plate 410.From as can be known above-mentioned, be the kenel of an area source by the light of end face 130 outgoing, in order to providing the liquid crystal panel (figure does not show) in the LCD required area source, and then make liquid crystal panel reach the effect of demonstration.It should be noted that, because cold cathode fluorescent lamp 300 of the present utility model significantly promotes on the adjusting range of briliancy and briliancy, so by on the adjusting range of the briliancy of the area source of end face 412 outgoing of light guide plate 410 and briliancy also can with lifting, so, LCD can possess higher brightness, and can be applied in the more high-resolution display.
Please continue to consult Fig. 4, in the cold cathode fluorescent lamp 300 of the present utility model, the shape of its outer fluorescent tube 310 and two interior fluorescent tubes 320 is not limited to cylindrical as shown in FIG., in order to reach the purpose of dwindling the space, it for example is elliptical cylinder-shape (figure does not show) that embodiment can change the shape of outer fluorescent tube 310 into.
From the above, the backlight module 400 of present embodiment for example more comprises a reflector 420, and this reflector 420 is disposed at 416 sides, side of light guide plate 410, and covers cold cathode fluorescent lamp 300.The light that cold cathode fluorescent lamp 300 is provided can the reflection by reflector 420 be concentrated the direction irradiation towards the side 416 of light guide plate 410, significantly to promote the light utilization ratio of backlight module 400.
Yet,, can on the exiting surface 412 of light guide plate 410, dispose a diffusion sheet 430 and a brightening piece 440 for the briliancy of promoting backlight module 400 presents.Wherein, diffusion sheet 430 is disposed on the end face of light guide plate 410 412, and brightening piece 440 is disposed on the diffusion sheet 430.By above-mentioned reflector 420, diffusion sheet 430 and brightening piece 440, can be so that the area source that backlight module 400 is provided more becomes perfect, to satisfy the demand of high briliancy and high LCD of resolving.
In addition, outer fluorescent tube 310 with light guide plate 410 assembling after, two interior fluorescent tubes 320 for example can the position on same vertical line, yet any those who familiarize themselves with the technology should know that the ornaments mode of cold cathode fluorescent lamp 300 is not limited to as shown in FIG..In other words, present embodiment for example can be with outer fluorescent tube 310 rotations one angle configurations in reflector 420, so that the angle of fluorescent tube 320 incident light guide plate 410 is better in two.
Comprehensive the above, the utility model has following advantages at least:
1. CCFL of the present utility model is a plurality of in order to carry by configuration in an outer fluorescent tube Interior fluorescent tube for light source can increase briliancy and the adjustable scope of briliancy of fluorescent tube, and then prolong The service life of long fluorescent tube.
2. CCFL of the present utility model coats a plurality of in order to light to be provided by an outer fluorescent tube Fluorescent tube in the interior fluorescent tube in source, so that these interior fluorescent tubes are subjected to the protection of outer fluorescent tube, so that fluorescent tube Bulk strength is strengthened, and is difficult for that external force ruptures because being subjected to improperly.
3. backlight module of the present utility model can provide the area source of a high brightness, so that liquid crystal Display has high brightness, high-resolution display capabilities.
Claims (12)
1. cold cathode fluorescent lamp is characterized in that it comprises:
One outer fluorescent tube;
Fluorescent tube in a plurality of is disposed in this outer fluorescent tube, and interior tool one of fluorescent tube brings out gas in those;
One visible light luminescent layer is disposed on the inwall of fluorescent tube in those; And
A plurality of electrode groups be disposed at the two ends of fluorescent tubes in those respectively, and those electrode groups are extended to the outside of this outer fluorescent tube respectively by the inside of fluorescent tube in those.
2. cold cathode fluorescent lamp as claimed in claim 1 is characterized in that, this brings out gas and is selected from the group that is made up of a mercury vapour and an inert gas.
3. cold cathode fluorescent lamp as claimed in claim 1 is characterized in that, this visible light luminescent layer comprises a fluorescence coating.
4. cold cathode fluorescent lamp as claimed in claim 1 is characterized in that, has an inert gas between this outer fluorescent tube and those the interior fluorescent tubes.
5. cold cathode fluorescent lamp as claimed in claim 1 is characterized in that, is vacuum state between this outer fluorescent tube and those the interior fluorescent tubes.
6. a backlight module is suitable for providing an area source, it is characterized in that, this backlight module comprises:
One light guide plate has an end face, a bottom surface and at least one side;
One cold cathode fluorescent lamp is disposed at by this side of this light guide plate, and wherein the light that this cold cathode fluorescent lamp provided can be by this this light guide plate of side incident, and is passed to this end face outgoing through behind this bottom surface, and this cold cathode fluorescent lamp comprises:
One outer fluorescent tube;
Fluorescent tube in a plurality of is disposed in this outer fluorescent tube, and interior tool one of fluorescent tube brings out gas in those;
One visible light luminescent layer is disposed on the inwall of fluorescent tube in those; And
A plurality of electrode groups be disposed at the two ends of fluorescent tubes in those respectively, and those electrode groups are extended to the outside of this outer fluorescent tube respectively by the inside of fluorescent tube in those.
7. backlight module as claimed in claim 6 is characterized in that, this brings out gas and is selected from the group that is made up of a mercury vapour and an inert gas.
8. backlight module as claimed in claim 6 is characterized in that, this visible light luminescent layer comprises a fluorescence coating.
9. backlight module as claimed in claim 6 is characterized in that, comprises an inert gas between this outer fluorescent tube and those the interior fluorescent tubes.
10. backlight module as claimed in claim 6 is characterized in that, is vacuum state between this outer fluorescent tube and those the interior fluorescent tubes.
11. backlight module as claimed in claim 6 is characterized in that, more comprises a reflector, this reflector is disposed at by this side of this light guide plate, to cover this cold cathode fluorescent lamp.
12. backlight module as claimed in claim 6 is characterized in that, more comprises a diffusion sheet and a brightening piece, this diffusion sheet is disposed on this end face of this light guide plate, and this brightening piece is disposed on this diffusion sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032037473U CN2599738Y (en) | 2003-02-17 | 2003-02-17 | Cold-cathode lamp tube and back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032037473U CN2599738Y (en) | 2003-02-17 | 2003-02-17 | Cold-cathode lamp tube and back light module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2599738Y true CN2599738Y (en) | 2004-01-14 |
Family
ID=34158245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032037473U Expired - Lifetime CN2599738Y (en) | 2003-02-17 | 2003-02-17 | Cold-cathode lamp tube and back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2599738Y (en) |
-
2003
- 2003-02-17 CN CNU032037473U patent/CN2599738Y/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 | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130217 Granted publication date: 20040114 |