CN201391823Y - Novel lampshade structure of liquid crystal display backlight module assembly - Google Patents
Novel lampshade structure of liquid crystal display backlight module assembly Download PDFInfo
- Publication number
- CN201391823Y CN201391823Y CN200920136335U CN200920136335U CN201391823Y CN 201391823 Y CN201391823 Y CN 201391823Y CN 200920136335 U CN200920136335 U CN 200920136335U CN 200920136335 U CN200920136335 U CN 200920136335U CN 201391823 Y CN201391823 Y CN 201391823Y
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- lampshade
- backlight module
- liquid crystal
- crystal display
- module assembly
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Abstract
The utility model relates to the lampshade structure improvement of liquid crystal display backlight module assembly, the integral lampshade with novel structure takes the shape of U, a light conducting board is clipped in an opening end, lamp tubes are arranged in the lampshade, the widths of two lateral sides of the lampshade, which are close to the lamp tubes, are larger than the widths of two lateral sides thereof which are close to the light conducting board, and the bottom of the lampshade is provided with a bending part. Under the preconditions of not influencing the flat and thin external appearance size and the optical characteristics, in the novel lampshade structure of the liquid crystal display backlight module assembly, the distance between two lamp tubes are maximally increased, the leakage current is reduced, and the temperature rise test is improved. Through testing, the novel lampshade structure of liquid crystal display backlight module assembly can be applied to all the national highland areas.
Description
[technical field]
The utility model relates to LCD and makes the field, specifically is meant the improvement of the lampshade structure of LCD backlight module.
[background technology]
Module backlight is one of key part and component of panel of LCD.Because liquid crystal itself is not luminous, the function of module backlight promptly is well-off brightness and the light source that is evenly distributed, and makes its normally show image.
The backlight liquid crystal display drive circuit has fluorescent tube parallel connection and fluorescent tube to connect two kinds at present.When adopting parallel operation, cost is the height of series connection.So industry generally adopts the mode of operation of fluorescent tube series connection at present.The trend of LCD development is that display area is increasing, and more and more flat thinning.The increase of display area the length of fluorescent tube is increased, thereby the operating voltage of fluorescent tube just increases.Leakage current between such two fluorescent tubes is also just corresponding to be increased.As shown in Figure 1, be the schematic diagram of the lampshade structure of prior art.Wherein lampshade 100 inside are provided with fluorescent tube 300, and its opening part accompanies LGP 200.The flat thinning of panel just makes shorter that the spacing of two fluorescent tubes in the fluorescent tube becomes, and this makes the bigger of electric leakage rheology between two fluorescent tubes.In a word, the development of panel all is that the leakage current of fluorescent tube is increased.And under low pressure, because the ionization of air, it is bigger that this leakage current also can become.
At bad panel, the height pressure side electric current of test fluorescent tube, according to resulting data in the practice, the leakage current of fluorescent tube is bigger, surpasses specification to such an extent as to flow through the electric current of fluorescent tube high-pressure side electrode.And under low air pressure condition, leakage current also can become greatly, and the electric current of high-field electrode is also just corresponding to become big.The big electric current that flows through the high-pressure side electrode produces localized hyperthermia in the high-pressure side of fluorescent tube, and this high temperature that continues causes the lampshade flavescence, and LGP partly melts the brightening piece flavescence near high temperature; And excessive electric current also causes the blackening of high-pressure side electrode, the aging aggravation of fluorescent tube; And above degradation phenomena further strengthens leakage current, and the high-field electrode electric current also further strengthens.So after a period of time is used in the highlands, above bad phenomenon just occurs.
[summary of the invention]
Technical problem to be solved in the utility model is to provide a kind of new construction lampshade of LCD backlight module, can be under the prerequisite that does not influence flat thin apparent size and optical characteristics, increase the spacing between two fluorescent tubes substantially, reduced leakage current, improved temperature rise.The utility model goes for all highlands of China after tested.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
The new construction lampshade of LCD backlight module, overall U-shaped, its openend accompanies LGP, and inside is provided with two fluorescent tubes; The width of the dual-side of the close fluorescent tube of this lampshade is greater than the width near the LGP dual-side.
Described lampshade bottom has a bend.
In the lampshade two side by side the stray capacitance between the fluorescent tube with the distance be inversely proportional to, the leakage current that flows through it then is directly proportional with the voltage at its two ends.During tandem working, between the two high-tension electricity utmost points 1600V is arranged, and from the high-pressure side to the low-pressure end, its pressure reduction relation of tapering off, so leakage current also is identical trend, the local temperature rise that it produced also is corresponding gradient relation.So, the lampshade width widen, the fluorescent tube spacing strengthens, and can improve the leakage current of fluorescent tube effectively, thereby improve temperature rise.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the lampshade structure schematic diagram of prior art.
Fig. 2 is the utility model new construction lampshade first example structure schematic diagram.
Fig. 3 is the utility model new construction lampshade second example structure schematic diagram
[specific embodiment]
First embodiment
See also shown in Figure 2, the new construction lampshade 10 of LCD backlight module, overall U-shaped, its openend accompanies LGP 20, inside is provided with two fluorescent tubes 30; The width of the dual- side 11,12 of these lampshade 10 close fluorescent tubes is greater than the width 13,14 near LGP 20 dual-sides.
In the lampshade 10 two side by side the stray capacitance between the fluorescent tube 30 with the distance be inversely proportional to, the leakage current that flows through it then is directly proportional with the voltage at its two ends.During tandem working, between the two high-tension electricity utmost points 1600V is arranged, and from the high-pressure side to the low-pressure end, its pressure reduction relation of tapering off, so leakage current also is identical trend, the local temperature rise that it produced also is corresponding gradient relation.So, the lampshade width widen, the fluorescent tube spacing strengthens, and can improve the leakage current of fluorescent tube effectively, thereby improve temperature rise.
Second embodiment
Second embodiment is identical with the structure major part of first embodiment, see also shown in Figure 3, new construction lampshade 10, overall U-shaped, its openend accompanies LGP 20, inside is provided with two fluorescent tubes 30; The width of the dual- side 11,12 of these lampshade 10 close fluorescent tubes is greater than the width 13,14 near LGP 20 dual-sides.Different is that these lampshade 10 bottoms also have a bend 15.This is owing to LGP is 6.0mm, and tube diameter is 2.4mm, and for increase the spacing between the fluorescent tube as far as possible and keep fluorescent tube and lampshade between between bent distance, so the lampshade of widening 10 has a bend 15.Through installation test, all optical parametrics of the utility model and meet the highlands application demand all in specification.
Claims (2)
1, the novel lamp cover structure of LCD backlight module is characterized in that: overall U-shaped, and its openend accompanies LGP, and inside is provided with two fluorescent tubes; The width of the dual-side of the close fluorescent tube of this lampshade is greater than the width near the LGP dual-side.
2, the novel lamp cover structure of LCD backlight module as claimed in claim 1, it is characterized in that: described lampshade bottom has a bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920136335U CN201391823Y (en) | 2009-01-09 | 2009-01-09 | Novel lampshade structure of liquid crystal display backlight module assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920136335U CN201391823Y (en) | 2009-01-09 | 2009-01-09 | Novel lampshade structure of liquid crystal display backlight module assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201391823Y true CN201391823Y (en) | 2010-01-27 |
Family
ID=41598648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920136335U Expired - Fee Related CN201391823Y (en) | 2009-01-09 | 2009-01-09 | Novel lampshade structure of liquid crystal display backlight module assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201391823Y (en) |
-
2009
- 2009-01-09 CN CN200920136335U patent/CN201391823Y/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20120109 |