CN101526191A - Lamp tube, backlight module and LCD device - Google Patents
Lamp tube, backlight module and LCD device Download PDFInfo
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- CN101526191A CN101526191A CN200810083215A CN200810083215A CN101526191A CN 101526191 A CN101526191 A CN 101526191A CN 200810083215 A CN200810083215 A CN 200810083215A CN 200810083215 A CN200810083215 A CN 200810083215A CN 101526191 A CN101526191 A CN 101526191A
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- fluorescent tube
- fluorescent
- backlight module
- lamp tube
- lamp
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Abstract
The invention discloses a lamp tube, a backlight module and an LCD device. The lamp tube comprises a hollow transparent lamp tube body and light ray, wherein the lamp tube body has different tube wall thicknesses; and the light ray is emitted from the hollow part of the lamp tube body from inside to outside. The backlight module and the LCD device are configured with lamp tubes with different tube wall thicknesses so as to improve the luminous efficiency and save the cost.
Description
Technical field
The present invention relates to a kind of fluorescent tube, particularly relate to the fluorescent tube of backlight module and liquid crystal indicator.
Background technology
Because the self luminous device of LCD right and wrong needs backlight module that light source is provided, backlight module is divided into two kinds of straight-down negative and side incident types according to installation position; The employed light source of backlight module can be cathode fluorescent tube, external electrode fluorescent lamp pipe (EEFL), differential electrode fluorescent tube (DEFL) or light emitting diode or the like.
Fig. 1 shows the cathode fluorescent tube of prior art, fluorescent tube 1 by glass tube 10, the fluorescent material 12 that is coated on glass tube 10 inner surfaces, the inert gas 14, two that flows into glass tube 10 be installed on the electrode 16 at glass tube 10 edges, two leads 18 that are electrically connected two electrodes 16 and extend glass tube 10 are respectively formed.
The high-field electrode 16 that is applied to electrode 16 when alternating voltage is during with low-field electrode 16, glass tube 10 is launched electronics and inert gas generation collision from low-field electrode 16 parts, number of electrons is index to be increased, inert gas is subjected to electron excitation and launches ultraviolet ray, and ultraviolet ray is launched visible light with fluorescent material 12 collisions.
Except circle, fluorescent tube also can be other kind of shape.As shown in Figure 2, the TaiWan, China patent disclosure discloses a kind of fluorescent tube 2 for No. 200725119, fluorescent tube 2 has the surface electrode 22 of oval-shaped glass tube 21 and two circles, and wherein fluorescent material 23 inwall, the inert gas 24 that are formed at glass tube 21 is sealed in the glass tube 21.Oval-shaped glass tube 21 has major axis and minor axis, and this disclosure of the Invention is with respect to the circular glass pipe, and the fluorescent material 23 of elliptic glass tube 21 excites area to increase, thereby improves luminous efficiency and brightness.
Trend along with the LCD large scaleization, no matter be the fluorescent tube of which kind of shape, its length certainly will increase, the thickness of glass tube, diameter also must increase, and make that the cost ratio that the brightness of fluorescent tube and luminous efficiency reduce, the cost of backlight module is multiple growth, LCD that backlight module occupies is also more and more high.
Therefore, be badly in need of providing a kind of fluorescent tube, backlight module and liquid crystal indicator, and reduce the cost of Backlight module and liquid crystal display with better luminous efficiency and brightness.
Summary of the invention
The object of the present invention is to provide a kind of fluorescent tube, backlight module and liquid crystal indicator, and reduce the cost of Backlight module and liquid crystal display with better luminous efficiency and brightness.
According to above-mentioned purpose, the invention provides a kind of fluorescent tube, comprise the lamp tube body of hollow transparent, it has and does not wait pipe thickness; And light, penetrate outward by interior by the hollow space of lamp tube body.Fluorescent tube can also comprise first electrode, is arranged at lamp tube body first end; Second electrode is arranged at this first end of this lamp tube body; Fluorescent material is arranged at the inner surface of the hollow space of lamp tube body; Inert gas seal is in the hollow space of lamp tube body; And two leads are electrically connected first electrode and second electrode respectively.
According to above-mentioned purpose, the invention provides direct type backlight module, comprise drain pan, the drain pan internal configurations has a plurality of above-mentioned " not waiting pipe thickness " fluorescent tube; And diffusion material is arranged at the drain pan top.
According to above-mentioned purpose, the invention provides side incident type backlight module, comprise above-mentioned " not waiting pipe thickness " fluorescent tube, be arranged at the side of backlight module; Reflector is around fluorescent tube; LGP, the light of this fluorescent tube incident converts area source to; Reflecting plate is arranged at the LGP bottom; And diffusion material is arranged at the LGP top.
According to above-mentioned purpose, the invention provides a kind of liquid crystal indicator, comprise liquid crystal panel; And backlight module, backlight module can be above-mentioned direct type backlight module or side incident type backlight module.
Description of drawings
Two kinds of existing lamp tube structures of Fig. 1 and Fig. 2 example;
Fig. 3 shows the fluorescent tube of the embodiment of the invention;
Fig. 4 to Fig. 5 shows the fluorescent tube of another embodiment of the present invention;
Fig. 6 compares the light energy distribution figure behind light-emitting device configuration the present invention and the prior art fluorescent tube;
Fig. 7 shows the fluorescent tube of some embodiments of the invention;
Fig. 8 shows the optics emulation of prior art fluorescent tube;
Fig. 9 shows the optics emulation of fluorescent tube of the present invention;
Figure 10 shows the direct type backlight module of the embodiment of the invention; And
Figure 11 shows the side incident type backlight module of the embodiment of the invention.
The specific embodiment
Prior art promotes luminous efficiency and brightness by the geometric shape that changes fluorescent tube, and effect is still not enough.It is considered herein that under the whole backlight module structure, the design of optics nothing more than be with the light effective collection to visible area, except promoting luminous efficiency, can effectively increase brightness of backlight module, effectively reducing energy loss also is a cogitable direction.Because fluorescent tube is a kind of line source, luminous form is toward dispersing from all directions, photoconduction if can be caused required place, can reduce loss of light source, and luminous efficiency is also promoted.
Fig. 3 shows the fluorescent tube of the embodiment of the invention, fluorescent tube 3 comprises triangle, hollow, transparent lamp tube body 31, the material of lamp tube body 31 can not wait for glass and lamp tube body 31 have, uneven wall thickness, light 32 is penetrated from interior outward by glass tube inside, the plane of top may be defined as light-emitting face 33, and light also can penetrate from other two surfaces.
Compare with technology of the prior art, utilization of the present invention does not wait wall thickness, causes the concavees lens light-emitting face 33 that a kind of central authorities are thin, the edge is thicker, can reflect when the light of incident is through light-emitting face 33 outside main shaft, light after the refraction is dispersed outward, makes the uniform bright dipping of light; Otherwise the fluorescent tube of prior art all has equal wall thickness, and light is through behind the light-emitting face, and the light that is positioned at main shaft has bigger luminous intensity, and luminous intensity is successively decreased with departing from main shaft.
Notion of the present invention can be implemented on the light source of any kind of, for example cathode fluorescent tube (CCFL), external electrode fluorescent lamp pipe (EEFL), differential electrode fluorescent tube (DEFL) or light emitting diode etc., and lamp tube body also is not limited to triangle.The backlight of considering the prior art stage can provide preferable efficient and preferable cost structure with cathode fluorescent tube, Fig. 4 to Fig. 5 shows the fluorescent tube of another embodiment of the present invention, it is a kind of cathode fluorescent tube, wherein Fig. 4 is the schematic diagram of fluorescent tube, and Fig. 5 is the profile of lamp tube body.
As shown in Figure 4, fluorescent tube 4 comprises the lamp tube body 41 of hollow transparent, first electrode 44 and second electrode 45 are arranged on first end 42 of lamp tube body 41 and second end 43 respectively and have part to extend in the lamp tube body 41, two coating portions 48 coat and fix first electrode 44 and second electrode 45 respectively, two leads 49 are electrically connected first electrode 44 and second electrode 45 respectively and extend coating portion 48, fluorescent material 47 is arranged at the inner surface of lamp tube body 41, and inert gas 46 is sealed in the hollow space of lamp tube body 41.
The shape of first electrode 44 and second electrode 45 is not limited to circle or ellipse, also can be other shape, can decide in conjunction with the shape of lamp tube body 41 hollow spaces.Coating portion 48 can be glass material, and is one-body molded and form with lamp tube body 41; In present embodiment lamp tube body 41 is triangle, and coating portion 48 then is drawn as circle gradually by triangle and forms, and coating portion 48 also can be other shape in other embodiment.Fluorescent material 47 comprises fluorophor or phosphor (phosphor), and the kind of phosphor can be decided according to required optical source wavelength.Inert gas 46 for example is the neon of fixed proportion and the mist of argon and mercury vapour.When alternating voltage is applied to first electrode 44 and second electrode 45, lamp tube body 41 is launched electronics and inert gas 46 generation collisions from second electrode 45, number of electrons is index to be increased, inert gas 46 is subjected to electron excitation and launches ultraviolet ray, and ultraviolet ray is launched visible light with fluorescent material 47 collisions.
The embodiment of above-mentioned Fig. 4, Fig. 5 is a kind of cathode fluorescent tube (CCFL), but is not limited to this.Those skilled in the art are via modifying the lamp tube structure that can obtain other kind, as external electrode fluorescent lamp pipe (EEFL), differential electrode fluorescent tube (DEFL) or the like.
Fig. 6 compares the light energy distribution of the present invention and prior art.Fluorescent tube such as " pipe thickness " of a plurality of prior aries is assemblied in light-emitting device 50, and for example backlight module obtains light energy distribution.In identical light-emitting device 50, keep conditions such as identical fluorescent tube number and fluorescent tube spacing, change the fluorescent tube of the present invention of a plurality of " not waiting pipe thickness ", for example the fluorescent tube of Fig. 3 or Fig. 4 can obtain more uniform light energy distribution.
The lamp tube body shape of aforementioned fluorescent tube of the present invention is not limited to triangle, and the fluorescent tube of several embodiment of Fig. 7 example comprises the lamp tube body of different shape: lamp tube body 51 is square or rectangle; Lamp tube body 52 is circular or oval; Lamp tube body 53 is a triangle; Lamp tube body 54 is polygon or regular hexagon.
The hollow space of the lamp tube body of above-mentioned each fluorescent tube embodiment also is not limited to circular or oval in the diagram, the center that the formation position of hollow space also can be asymmetric with lamp tube body is provided with, but the shape of hollow space cooperates the shape of lamp tube body will determine the Energy distribution evenness of fluorescent tube bright dipping with the position.For convenience of description, the lamp tube body of arbitrary shape, for example lamp tube body 51,52,53,54, the present invention all defines thick a of thin-walled and the thick b of heavy wall, in addition, can define light-emitting face 55 again, go out luminous intensity preferably for asking, light-emitting face 55 should be orthogonal to the thick a of thin-walled, so can cause the concavees lens light-emitting face 55 that a kind of central authorities are thin, the edge is thicker.
In addition, find via experiment, when the ratio of thick b of heavy wall and the thick a of thin-walled roughly between 1.1 to 6,1.1＜b/a＜6 o'clock just, it is better that fluorescent tube goes out uniformity of light.And the thick b of heavy wall is exemplified as 0.1 to 0.6mm with the size of the thick a of thin-walled on example, but is not limited to this.In addition, the lamp tube body of the various embodiments described above fluorescent tube also can be applicable to the cathode fluorescent tube as Fig. 4.
The optics simulation result that Fig. 8 shows is existing " etc. pipe thickness "; Fig. 9 shows the optics simulation result that the present invention " does not wait pipe thickness ".To the luminosity of z wheelbase from (mm of unit), brill is every square metre wattage (W/m to demonstration x wheelbase from (mm of unit) among the figure
2).Can learn obviously that by diagram the difference of the high-high brightness of the fluorescent tube that the present invention " does not wait pipe thickness " and minimum brightness is less and luminosity is comparatively average.
Figure 10 example fluorescent tube of the present invention can be applicable to the backlight module in the LCD.The backlight module 60 of straight-down negative comprises drain pan 56, and drain pan has inner 57 and disposes the fluorescent tube 58 that a plurality of the present invention do not wait pipe thickness, and drain pan 56 tops dispose diffusion material 59.
In addition, find that by experiment the arrangement position that fluorescent tube 58 is disposed at backlight module 60 also can influence luminous efficiency.If definition fluorescent tube 58 spacings are that c, fluorescent tube 58 to the distance of diffusion material 59 bottoms are d, find when c/d＞1.5, luminous efficiency is preferably arranged by experiment, if the thick a of thin-walled of the fluorescent tube 58 of arranging in pairs or groups again is provided with towards diffusion material 58, luminous efficiency is better.
Figure 11 example fluorescent tube of the present invention can be applicable to the side incident type backlight module in the LCD.(single one or both sides) are provided with the fluorescent tube 61 that the present invention " does not wait pipe thickness ", for example each fluorescent tube of earlier figures 3, Fig. 4, Fig. 7 embodiment to backlight module 66 in the side; Reflector 62 is around fluorescent tube 61; LGP 63 converts the light of fluorescent tube 61 incidents to area source; Reflecting plate 64 is arranged at LGP 63 bottoms; Diffusion material 65 is arranged at LGP 63 tops.Diffusion material 65 can be to be made of several diffusion layers, and diffusion material 65 is used for scattering, diffusion light makes even bright dipping.The top of diffusion material 65 may be provided with one or more prismatic lens (not shown) again can help uniform irradiation.
The also visual demand of hollow space that it should be noted that the present invention's fluorescent tube that " do not wait pipe thickness " causes the convex lens light-emitting face that a kind of central authorities are thicker, the edge is thin, can consider such lamp tube structure when for example being applied to side incident type backlight module.
Backlight module as Figure 10, Figure 11 can be applicable to liquid crystal indicator.Liquid crystal panel (not shown) for example can be set on the backlight module 60/66, comprise colored filter substrate and thin film transistor base plate, be filled with liquid crystal between the two substrates, constitute liquid crystal indicator.Thin film transistor base plate according to video data electric control liquid crystal and the light of regulating backlight module 60/66 emission to form image.
Thus, fluorescent tube disclosed by the invention, backlight module and liquid crystal indicator can have better luminous efficiency and brightness, and reduce the cost of Backlight module and liquid crystal display.
The above is the preferred embodiments of the present invention only, is not to be used to limit claim scope of the present invention; All do not break away from equivalence change or the modification that the disclosed spirit of invention is finished, and all should comprise within the scope of the appended claims.
Claims (13)
1, a kind of fluorescent tube comprises:
The lamp tube body of hollow has and does not wait pipe thickness, and the light of wherein said fluorescent tube is penetrated by interior outward by the hollow space of described lamp tube body.
2, fluorescent tube as claimed in claim 1, the material of wherein said lamp tube body are glass, and described fluorescent tube is cathode fluorescent tube, external electrode fluorescent lamp pipe, differential electrode fluorescent tube or light emitting diode.
3, fluorescent tube as claimed in claim 1, the inwall of wherein said lamp tube body have the concavees lens light-emitting face that central authorities are thin, the edge is thicker.
4, fluorescent tube as claimed in claim 1, the profile of wherein said lamp tube body are a kind of in square, rectangle, rhombus, circle, ellipse, triangle, polygon and the regular hexagon.
5, fluorescent tube as claimed in claim 1, the tube wall of wherein said fluorescent tube still comprise the thick and light-emitting face of heavy wall that thin-walled is thick, thickness is b that thickness is a, and wherein said thin-walled is thick is positioned on the direction vertical with described light-emitting face.
6, fluorescent tube as claimed in claim 5, the ratio of the thickness a that thickness b that wherein said heavy wall is thick and thin-walled are thick roughly between 1.1 to 6, i.e. 1.1＜b/a＜6.
7, fluorescent tube as claimed in claim 5, the size of the thickness a that thickness b that wherein said heavy wall is thick and described thin-walled are thick is roughly between 0.1 to 0.6mm.
8, a kind of backlight module comprises:
Drain pan;
A plurality of fluorescent tubes are arranged at described drain pan, and wherein each described fluorescent tube comprises and has the lamp tube body that does not wait pipe thickness; And
Diffusion material is arranged at described a plurality of fluorescent tubes top.
9, backlight module as claimed in claim 8, the fluorescent tube spacing of wherein said a plurality of fluorescent tubes is defined as c, and the distance definition between described fluorescent tube and described diffusion material is d, and c/d＞1.5.
10, a kind of backlight module comprises:
LGP;
Fluorescent tube is arranged at the side of described LGP, and described fluorescent tube comprises and has the lamp tube body that does not wait pipe thickness;
Reflector is around described fluorescent tube; And
Diffusion material is arranged at described LGP top.
11, backlight module as claimed in claim 10, the inwall of the described lamp tube body of wherein said fluorescent tube have the convex lens light-emitting face that central authorities are thicker, the edge is thin.
12, a kind of liquid crystal indicator comprises:
Liquid crystal panel;
Backlight module comprises:
Drain pan;
A plurality of fluorescent tubes are arranged at described drain pan, and wherein each described fluorescent tube comprises not have and waits
The lamp tube body of pipe thickness; And
Diffusion material is arranged at described a plurality of fluorescent tubes top.
13, a kind of liquid crystal indicator comprises:
Liquid crystal panel;
Backlight module comprises:
LGP;
Fluorescent tube is arranged at the side of described LGP, and described fluorescent tube comprises and has the lamp tube body that does not wait pipe thickness;
Reflector is around described fluorescent tube; And
Diffusion material is arranged at described LGP top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810083215A CN101526191A (en) | 2008-03-04 | 2008-03-04 | Lamp tube, backlight module and LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810083215A CN101526191A (en) | 2008-03-04 | 2008-03-04 | Lamp tube, backlight module and LCD device |
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| Publication Number | Publication Date |
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| CN101526191A true CN101526191A (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810083215A Pending CN101526191A (en) | 2008-03-04 | 2008-03-04 | Lamp tube, backlight module and LCD device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011143925A1 (en) * | 2010-05-19 | 2011-11-24 | Jin Tao | Energy-saving and shockproof lighting lamp with high luminance |
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2008
- 2008-03-04 CN CN200810083215A patent/CN101526191A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011143925A1 (en) * | 2010-05-19 | 2011-11-24 | Jin Tao | Energy-saving and shockproof lighting lamp with high luminance |
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Application publication date: 20090909 |