CN101725845B - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN101725845B CN101725845B CN2008101703193A CN200810170319A CN101725845B CN 101725845 B CN101725845 B CN 101725845B CN 2008101703193 A CN2008101703193 A CN 2008101703193A CN 200810170319 A CN200810170319 A CN 200810170319A CN 101725845 B CN101725845 B CN 101725845B
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- fluorescent tube
- packing ring
- lgp
- backlight module
- tube packing
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Abstract
The invention discloses a backlight module and a liquid crystal display. The backlight module comprises a lampshade, at least one light tube, at least one light tube gasket and a light guide plate, wherein the light tubes are configured in the lampshade, and the light tube gaskets are configured on the light tubes and positioned at the tail ends of the light tubes; and the light guide plate is configured at one sides of the light tubes and is in contact with the light tube gaskets. The light tube gaskets are arranged at the tail ends of the light tubes, and the light guide plate is in contact with the light tube gaskets, thereby solving the problem of dark corners of the backlight module.
Description
Technical field
The present invention relates to a kind of liquid crystal display, and be particularly related to a kind of liquid crystal display and backlight module thereof.
Background technology
Liquid crystal display can roughly be divided into display panels and backlight module two large divisions, and wherein backlight module is in order to provide enough briliancy, and display panels can show image.
Fig. 1 is the schematic diagram of known a kind of backlight module.Show that such as Fig. 1 the main member of backlight module 100 comprises lampshade (not shown), fluorescent tube 110 and LGP 120.Fluorescent tube 110 is configured in the lampshade, and wherein fluorescent tube 110 is positioned at by the incidence surface 120a of LGP 120, and the light of fluorescent tube 110 can enter in the LGP 120 by incidence surface 120a, and is penetrated by the exiting surface 120b of LGP 120.
In order to support and to separate fluorescent tube 110 and light tube reflection cover (not shown), therefore usually understand sheathed fluorescent tube packing ring (lamp spacer or O-ring) 112 on the optional position of fluorescent tube 110.Usually, it is thick with meat that fluorescent tube packing ring 112 has certain inside and outside footpath.Therefore, in case when light tube reflection cover is out of shape, just can be expressed to fluorescent tube packing ring 112, and then makes fluorescent tube packing ring 112 touch the incidence surface 120a of LGP 120.The contact point place of the incidence surface 120a of fluorescent tube packing ring 112 and LGP 120 will produce the clear zone A of a searchlight formula, makes backlight module 100 that the phenomenon of luminance nonuniformity (mura) be arranged.The generation of clear zone A will affect the optical quality of backlight module 100, and then affects the display quality of liquid crystal display.
Summary of the invention
The invention provides a kind of backlight module with good optical qualities.
The invention provides a kind of liquid crystal display with good display quality.
The present invention proposes a kind of backlight module, and it comprises a lampshade, at least one fluorescent tube, at least one fluorescent tube packing ring and a LGP.Fluorescent tube is disposed in the lampshade, and the fluorescent tube packing ring is equipped on the fluorescent tube, and fluorescent tube packing ring and be positioned at one of them end of fluorescent tube.LGP is disposed at a side of fluorescent tube, wherein LGP contact fluorescent tube packing ring.
In one embodiment of this invention, above-mentioned fluorescent tube is cold-cathode fluorescence lamp (cold cathodefluorescence lamp, CCFL).
In one embodiment of this invention, above-mentioned LGP has a plurality of V-grooves (V-groove), and V-groove is positioned at a surface of LGP.
In one embodiment of this invention, above-mentioned fluorescent tube packing ring has a plurality of scattering particles.
In one embodiment of this invention, the material of above-mentioned scattering particles comprises Merlon (polycarbonate, PC).
In one embodiment of this invention, when above-mentioned LGP contacted the fluorescent tube packing ring, LGP can push the fluorescent tube packing ring, makes the fluorescent tube gasket deforms.
In one embodiment of this invention, the outer surface of above-mentioned fluorescent tube packing ring is to be linked to each other and formed by a plurality of curved surfaces with different curvature.
In one embodiment of this invention, the outer surface of above-mentioned fluorescent tube packing ring is an egg type, and the tip of egg type contacts with LGP.
In one embodiment of this invention, the outer surface of above-mentioned fluorescent tube packing ring is one petal, and one of them petal contacts with LGP.In addition, these petals have different curvature.
The present invention proposes a kind of liquid crystal display, and it comprises a display panels and above-mentioned backlight module, and wherein backlight module is disposed under the display panels.
In one embodiment of this invention, above-mentioned liquid crystal display comprises that also one is disposed at the blooming piece between display panels and the backlight module.
In one embodiment of this invention, above-mentioned blooming piece comprises prismatic lens, diffusion disk or brightening piece.
In backlight module of the present invention, the fluorescent tube packing ring is equipped on the end of fluorescent tube, and utilizes fluorescent tube packing ring contact LGP, to form the clear zone in the corresponding fluorescent tube of LGP end.In addition, also can be that to utilize outer surface be the fluorescent tube packing ring that the curved surface by a plurality of different curvature is formed by connecting, to form the clear zone in the corresponding fluorescent tube of LGP end.So, utilize the known middle clear zone problem that affects the optical quality of backlight film group, improve the dark angle problem of backlight module.Backlight module of the present invention is applied in the liquid crystal display, can makes liquid crystal display have good display quality.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended diagram, be described in detail below.
Description of drawings
Fig. 1 is the schematic diagram of known a kind of backlight module.
Fig. 2 A is the generalized section of the backlight module of first embodiment of the invention.
Fig. 2 B is the profile of the backlight module of Fig. 2 A.
After Fig. 3 A and 3B were LGP contact fluorescent tube packing ring, the fluorescent tube gasket deforms was to produce the schematic diagram in clear zone.
After Fig. 4 A and 4B were LGP contact fluorescent tube packing ring, fluorescent tube gasket deforms amount was greatly to produce the schematic diagram in clear zone.
Fig. 5 is the schematic diagram of liquid crystal display.
Fig. 6 is the schematic diagram of the backlight module of second embodiment of the invention.
Fig. 7 is the schematic diagram of the backlight module of the petal-shaped fluorescent tube packing ring of use.
Description of reference numerals
100,200,300: backlight module
110,220: fluorescent tube
112,230,330,330 ': the fluorescent tube packing ring
120,240: LGP
120a, 240a: incidence surface
120b: exiting surface
210: lampshade
212: the reflecting layer
222: end
232: outer surface
234: scattering particles
242: the surface
244:V type groove
500: display panels
510: blooming piece
600: liquid crystal display
A, B, C, D: clear zone
The specific embodiment
The first embodiment
Fig. 2 A is the schematic diagram of the backlight module of first embodiment of the invention, and Fig. 2 B is the profile of the backlight module of Fig. 2 A.Please also refer to Fig. 2 A and 2B, backlight module 200 comprises a lampshade 210, at least one fluorescent tube 220, at least one fluorescent tube packing ring 230 and a LGP 240.In order to alleviate the overall weight of backlight module 200, lampshade 210 can be to utilize the lighter plastics of weight to make, and fluorescent tube 220 is disposed in the lampshade 210, and wherein fluorescent tube 220 is cold-cathode fluorescence lamp.In addition, in order to increase the light source utilization rate of fluorescent tube 220, also can between lampshade 210 and fluorescent tube 220, set a reflecting layer 212 with high reflectance.
In order to support and to separate fluorescent tube 220 and reflecting layer 212, therefore can set fluorescent tube packing ring 230 at fluorescent tube 220, and the fluorescent tube packing ring 230 of present embodiment is sheathed on the end 222 of fluorescent tube 220, wherein terminal 222 is the electrode tip of fluorescent tube 220.In order not allow fluorescent tube packing ring 230 affect the optical effect of backlight module 200 and to have pooling feature concurrently, so the material of fluorescent tube packing ring 230 can be selected transparent and the flexible resin of tool.
LGP 240 is disposed at a side of fluorescent tube 220, and wherein the incidence surface 240a of LGP 240 can contact fluorescent tube packing ring 230.When LGP 240 contact fluorescent tube packing ring 230, LGP 240 just can produce a clear zone with the contact point of fluorescent tube packing ring 230.
After Fig. 3 A and 3B were LGP contact fluorescent tube packing ring, the fluorescent tube gasket deforms was to produce the schematic diagram in clear zone.By Fig. 3 A and 3B as can be known, when LGP 240 contacted fluorescent tube packing ring 230 a little, the outer surface 232 that fluorescent tube packing ring 230 contacts with LGP 240 had slight distortion.At this moment, the deformation of fluorescent tube packing ring 230 makes has a clear zone B to produce on the LGP 240.
After Fig. 4 A and 4B were LGP contact fluorescent tube packing ring, fluorescent tube gasket deforms amount was greatly to produce the schematic diagram in clear zone.By Fig. 4 A and 4B as can be known, when LGP 240 continues extruding fluorescent tube packing rings 230, the deflection of fluorescent tube packing ring 230 increases, and the curvature of the outer surface 232 of fluorescent tube packing ring 230 also can increase relatively.At this moment, the deformation of fluorescent tube packing ring 230 increases the clear zone C scope on the LGP 240, and is large than the clear zone B among Fig. 3 A.Therefore, the briliancy of configuration place of backlight module 200 corresponding fluorescent tube packing rings 230 also improves relatively.Push thus fluorescent tube packing ring 230, with the result of the deflection that changes fluorescent tube packing ring 230 as can be known, by the degree of LGP 240 extruding fluorescent tube packing rings 230, can adjust the range size in clear zone.
From the above, by fluorescent tube packing ring 230 being configured in the end of fluorescent tube 220, and extruding allows the light of fluorescent tube 220 concentrate on LGP 240 corresponding fluorescent tube packing rings 230 places so that fluorescent tube packing ring 230 produces deformation, to form the clear zone.This clear zone can compensate the not enough problem of end 222 light of fluorescent tube 220.
Please also refer to Fig. 1 and Fig. 2 A, in known backlight module 100, the two ends of fluorescent tube 110 are electrode tip, and its briliancy is lower, produce so that place, the two ends of backlight module 100 corresponding fluorescent tubes 110 has dark angle.In addition, fluorescent tube packing ring 112 optionally is disposed on the fluorescent tube 110, and the luminance nonuniformity phenomenon of the contact point place of fluorescent tube packing ring 112 and LGP 120 generation searchlight formula, affects the briliancy performance of backlight module 100 integral body.
Yet, in the present embodiment, by fluorescent tube packing ring 230 being provided in the end 222 of fluorescent tube 220, and deliberately with LGP 240 contact fluorescent tube packing rings 230 to form the clear zone at LGP 240.The generation in this clear zone increases the briliancy at dark angle at end 222 places of backlight module 200 corresponding fluorescent tubes 220 on the contrary, can and then promote the integral brightness performance of backlight module 200.
In addition, in order to increase the light harvesting effect of LGP 240, usually can make a plurality of V-grooves 244 on a surface 242 of LGP 240.In addition, in order to promote the light source utilization rate, also can add a plurality of transparent scattering particles 234 in fluorescent tube packing ring 230, so that light scattering, wherein the material of scattering particles 234 is Merlon.
From the above, by fluorescent tube packing ring 230 is provided in the end of fluorescent tube 220, and make LGP 240 contact fluorescent tube packing rings 230, can utilize clear zone that the distortion of fluorescent tube packing ring 230 produces to compensate dark angle, increase the light source utilization rate, and then promote the integral brightness performance of backlight module 200.Further this backlight module 200 is placed a display panels 500 times, to form a liquid crystal display 600 that shows such as Fig. 5.Because backlight module 200 has good light effect, so this liquid crystal display 600 can have good display quality.In addition, in order to make liquid crystal display 600 have more good display quality, liquid crystal display 600 comprises that also one is configured in the blooming piece 510 between backlight module 200 and the display panels 500, and this blooming piece 510 can be brightening piece, prismatic lens or diffusion disk.
The second embodiment
The backlight module of the backlight module of present embodiment and the first embodiment is roughly the same, and same or analogous element numbers represents same or analogous element.Fig. 6 is the schematic diagram of the backlight module of second embodiment of the invention.Please refer to Fig. 6, present embodiment is with the difference of the first embodiment: the outer surface 332 of fluorescent tube packing ring 330 is to be linked to each other and formed by a plurality of curved surfaces with different curvature.For example, fluorescent tube packing ring 330 can be egg type, and shape away from an end of LGP 240 is comparatively mild relatively for it, and comparatively sharp-pointed towards the shape of the other end of LGP 240.
When fluorescent tube packing ring 330 does not contact LGP 240, by the shape of fluorescent tube packing ring 330, can make the light of fluorescent tube 220 concentrate on most advanced and sophisticated rear the ejaculation, and form clear zone D at LGP 240.The generation of this clear zone D can compensate for backlight module 300 the briliancy at dark angle, and then promote the overall brightness of backlight module 300.Identical with the first embodiment, when LGP 240 contacts and extruding fluorescent tube packing ring 330, the distortion of fluorescent tube packing ring 330 can make the clear zone become large, and the scope in clear zone can increase along with the deflection of fluorescent tube packing ring 330.
Although the fluorescent tube packing ring 330 of present embodiment be shaped as egg type, but those skilled in the art, after considering its experience, this specification or other disclosed file in the art in light of actual conditions, can well imagine with the shape change of fluorescent tube packing ring 330.
Fig. 7 is the schematic diagram of the backlight module of the petal-shaped fluorescent tube packing ring of use.Show that such as Fig. 7 the shape of fluorescent tube packing ring 330 ' also can be petal-shaped, one of them of these petals contacts with LGP at least, and these petals have different curvature, and can be rule or arrange brokenly.By allowing the outer surface of fluorescent tube packing ring be that curved surface by a plurality of different curvature links to each other and forms, the briliancy at dark angle that equally also can the compensate for backlight module promotes the integral brightness performance of backlight module.
In sum, backlight module of the present invention and liquid crystal display have following advantages at least:
One, the fluorescent tube packing ring is arranged at the end of fluorescent tube, and allows LGP contact the fluorescent tube packing ring, form the clear zone with the end at the corresponding fluorescent tube of LGP, improve the brightness at the dark angle of backlight module.
Two, utilizing outer surface is by the continuous fluorescent tube packing ring that forms of the curved surface of multiple different curvature, to form the clear zone at the corresponding fluorescent tube packing ring of LGP place, improves the brightness at the dark angle of backlight module.
Three, by the degree of LGP extruding fluorescent tube packing ring, can determine the size in clear zone, thereby determine the integral brightness performance of backlight module.
Four, backlight module has after the good optical quality, and liquid crystal display just can have good display quality.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; those of ordinary skill in the technical field under any; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (8)
1. backlight module comprises:
One lampshade;
At least one fluorescent tube is disposed in this lampshade;
At least one fluorescent tube packing ring, be equipped on this fluorescent tube, and be positioned at least one end of this fluorescent tube, the outer surface of this fluorescent tube packing ring is to be linked to each other and formed by a plurality of curved surfaces with different curvature, and the outer surface of this fluorescent tube packing ring is relatively comparatively mild away from an end of this LGP, and more sharp-pointed towards the other end of this LGP; And
One LGP is disposed at a side of this fluorescent tube, and wherein this LGP contacts this fluorescent tube packing ring, and the deformation of this fluorescent tube packing ring makes this LGP produce the clear zone.
2. backlight module as claimed in claim 1, wherein this fluorescent tube packing ring has a plurality of scattering particles.
3. backlight module as claimed in claim 1, wherein the outer surface of this fluorescent tube packing ring is an egg type, the tip of this egg type contacts with this LGP.
4. backlight module as claimed in claim 1, wherein the outer surface of this fluorescent tube packing ring is one petal, and those petals one of them contacts with this LGP at least.
5. liquid crystal display comprises:
One display panels; And
Backlight module is disposed under this display panels, comprising:
One lampshade, wherein this display panels is disposed on this lampshade;
At least one fluorescent tube is disposed in this lampshade;
At least one fluorescent tube packing ring, be equipped on this fluorescent tube, and be positioned at least one end of this fluorescent tube, the outer surface of this fluorescent tube packing ring is to be linked to each other and formed by a plurality of curved surfaces with different curvature, and the outer surface of this fluorescent tube packing ring is relatively comparatively mild away from an end of this LGP, and more sharp-pointed towards the other end of this LGP; And
One LGP is disposed at a side of this fluorescent tube, and wherein this LGP contacts this fluorescent tube packing ring, and the deformation of this fluorescent tube packing ring makes this LGP produce the clear zone.
6. liquid crystal display as claimed in claim 5, wherein this fluorescent tube packing ring has a plurality of scattering particles.
7. liquid crystal display as claimed in claim 5, wherein the outer surface of this fluorescent tube packing ring is an egg type, the tip of this egg type contacts with this LGP.
8. liquid crystal display as claimed in claim 5, wherein the outer surface of this fluorescent tube packing ring is one petal, one of them of those petals contacts with this LGP at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101703193A CN101725845B (en) | 2008-10-16 | 2008-10-16 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101703193A CN101725845B (en) | 2008-10-16 | 2008-10-16 | Backlight module and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101725845A CN101725845A (en) | 2010-06-09 |
| CN101725845B true CN101725845B (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101703193A Expired - Fee Related CN101725845B (en) | 2008-10-16 | 2008-10-16 | Backlight module and liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725845B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611939Y (en) * | 2003-04-11 | 2004-04-14 | 李尚� | Sielight type face light source device |
| CN1837928A (en) * | 2006-04-19 | 2006-09-27 | 友达光电股份有限公司 | Back light unit |
| CN201097049Y (en) * | 2007-08-06 | 2008-08-06 | 中华映管股份有限公司 | Plane display and backlight module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM314867U (en) * | 2006-11-27 | 2007-07-01 | Innolux Display Corp | Backlight module |
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2008
- 2008-10-16 CN CN2008101703193A patent/CN101725845B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611939Y (en) * | 2003-04-11 | 2004-04-14 | 李尚� | Sielight type face light source device |
| CN1837928A (en) * | 2006-04-19 | 2006-09-27 | 友达光电股份有限公司 | Back light unit |
| CN201097049Y (en) * | 2007-08-06 | 2008-08-06 | 中华映管股份有限公司 | Plane display and backlight module |
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| Publication number | Publication date |
|---|---|
| CN101725845A (en) | 2010-06-09 |
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