CN1641436A - Straight-down backlight module - Google Patents
Straight-down backlight module Download PDFInfo
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- CN1641436A CN1641436A CN 200410015084 CN200410015084A CN1641436A CN 1641436 A CN1641436 A CN 1641436A CN 200410015084 CN200410015084 CN 200410015084 CN 200410015084 A CN200410015084 A CN 200410015084A CN 1641436 A CN1641436 A CN 1641436A
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- mode set
- down straight
- aphototropism mode
- straight aphototropism
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Abstract
This invention unfurls a kind of straight-down apheliotropic module group including several lamp tubes, a diffusing board, a reflecting board and a cooling slice. The diffusing board is equipped above the lamp tube, while the reflecting board is equipped below the lamp tube having a reflecting plane and a back side. The cooling slice has a pedestal and several finlike slices equipped on the pedestal. The pedestal clings to the back side of the reflecting board.
Description
[technical field]
The invention relates to a kind of down straight aphototropism mode set, particularly a kind of down straight aphototropism mode set with heat abstractor.
[background technology]
Because advantages such as LCD has gently, approaches, power consumption is little are so be widely used in modernized information equipments such as notebook, mobile phone, personal digital assistant.Because liquid crystal itself does not have the characteristics of luminescence, therefore being required to be it provides module backlight to realize Presentation Function.
Module backlight generally can be divided into side-light type and two kinds of designs of straight-down negative.For the small-medium size LCD, advantage such as side-light type module backlight has gently, approaches, power consumption is low.But, along with science and technology is growing, demand to the large scale liquid crystal display is surging day by day, and large scale side-light type module backlight is difficult as people's will in the performance of aspects such as weight and power consumption, and the light utilization efficiency of side-light type module backlight is lower, its number of light sources of holding is also very limited, therefore can't reach the brightness requirement of large scale liquid crystal display.Therefore, the down straight aphototropism mode set that does not contain light guide plate is grown up.
A kind of prior art down straight aphototropism mode set can be consulted the TaiWan, China patent the 564th of bulletin on Dec 1st, 2003, No. 302, as shown in Figure 1, this module 110 backlight is arranged on a display panel 112 belows, comprises a plurality of fluorescent tubes that are arranged in parallel 114, a diffuser plate 116, is arranged on brightening piece 122 and diffusion sheet 124, a reflecting plate 118 and a housing 120 on this diffuser plate 116.This fluorescent tube 114 is used to provide a light source; This diffuser plate 116 is used for the light source that this fluorescent tube 114 produces is scattered to this display panel 112 between this fluorescent tube 114 and this display panel 112; This reflecting plate 118 is arranged on this fluorescent tube 114 belows, is used for the light that this fluorescent tube 114 produces is reflexed to this diffuser plate 116, and this reflecting plate 118 has a plurality of concaveconvex structures 131 and a plurality of opening 130, to increase the radiating efficiency of this reflecting plate 118.The concaveconvex structure 131 of this reflecting plate 118 is reverse V-shaped structures.This housing 120 is arranged on these reflecting plate 118 belows and coats around this reflecting plate 118.This housing 120 has a plurality of concaveconvex structures 121, to increase the area of dissipation of this module 110 backlight.
This module 110 backlight is by the concaveconvex structure 131 of reflecting plate 118, the concaveconvex structure 121 of opening 130 and housing 120 increases radiating efficiency, but, there is following problem in this module 110 backlight: the heat transferred that this fluorescent tube 114 produces is behind reflecting plate 118, be transmitted to housing 120 by air in the mode of natural convection again, when the temperature difference is little in the module 110 backlight, the natural convection speed of air can be very not fast, and, 131 area of dissipations that can increase of concaveconvex structure by reflecting plate 118 are limited, and it still exists heat to distribute the not high problem of efficient in heat radiation; Opening 130 is set on reflecting plate 118, and then fluorescent tube 114 light that is transmitted into these opening 130 positions will project housing 120 by opening 130, and the plate 118 that is difficult to be reflected again reflexes to diffuser plate 116, causes light utilization efficiency not high enough.
[summary of the invention]
For the down straight aphototropism mode set heat that overcomes prior art distributes the problem that efficient is not high, light utilization efficiency is not high enough, the invention provides the down straight aphototropism mode set that a kind of radiating efficiency is higher and light utilization efficiency is higher.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of down straight aphototropism mode set is provided, it comprises a plurality of fluorescent tubes, a diffuser plate, a reflecting plate and a heat radiator, this diffuser plate is arranged on this fluorescent tube top, this reflecting plate is arranged on this fluorescent tube below, have a reflecting surface and a dorsal surface, reflex to this diffuser plate in order to the light that this fluorescent tube is produced by this reflecting surface, this heat radiator has a pedestal and a plurality of fin that is arranged on this pedestal, and this pedestal is close to the dorsal surface of this reflecting plate.
Compared to prior art, because down straight aphototropism mode set of the present invention adopts heat radiator, the pedestal of this heat radiator is close to the dorsal surface of this reflecting plate, can directly the heat that fluorescent tube produces be conducted to distributing behind a plurality of fins by heat conduction, these a plurality of fins increase area of dissipation, therefore can improve the internal heat dissipating efficient of down straight aphototropism mode set of the present invention; Simultaneously,, projection light thereon all can be reflexed to diffuser plate, thereby make full use of light source, improve the brightness of module backlight because the reflecting plate of down straight aphototropism mode set of the present invention does not have opening.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of prior art down straight aphototropism mode set.
Fig. 2 is the diagrammatic cross-section of down straight aphototropism mode set first embodiment of the present invention.
Fig. 3 is the diagrammatic cross-section of down straight aphototropism mode set second embodiment of the present invention.
Fig. 4 is the diagrammatic cross-section of down straight aphototropism mode set the 3rd embodiment of the present invention.
[embodiment]
Seeing also Fig. 2, is first embodiment of down straight aphototropism mode set of the present invention.This down straight aphototropism mode set 20 comprises a plurality of fluorescent tubes 24, diffuser plate 21, brightening piece 22, diffusion sheet 23, reflecting plate 25, heat radiator 26 and a housing 27.
This diffuser plate 21, brightening piece 22 and diffusion sheet 23 are arranged on this fluorescent tube 24 tops in regular turn.This reflecting plate 25 is arranged on this fluorescent tube 24 belows, has a reflecting surface 251 and a dorsal surface 252, reflexes to this diffuser plate 21 in order to the light that this fluorescent tube 24 is produced by this reflecting surface 251.This heat radiator 26 has a pedestal 261 and a plurality of radiating fin 262 that is arranged on this pedestal 261, and this pedestal 261 is close to the dorsal surface 252 of this reflecting plate 25.This housing 27 has a base plate 271 and a plurality of side plate 272, and this housing 27 is arranged on these heat radiator 26 belows and coats this reflecting plate 25 and heat radiator 26.
This fluorescent tube 24 is the cold cathode fluorescent lamp pipe, this diffuser plate 21 is provided with a plurality of diffusing structures 211 with respect to the position of fluorescent tube 24, this diffusing structure 211 can spread the light that fluorescent tube 24 sends, and the light that fluorescent tube 24 is sent is converted to uniform in-plane light through behind diffuser plate 21, brightening piece 22 and the diffusion sheet 23.
The pedestal 261 of this heat radiator 26 is fixed on the reflecting plate 25 by screw 263, the height of this screw 263 is less than the gross thickness of this pedestal 261 with this reflecting plate 25, therefore, behind these screw 263 fixed pedestals 261 and reflecting plate 25, do not stretch out the reflecting surface 251 of this reflecting plate 25, avoid damage reflecting surface 251.
Because this down straight aphototropism mode set 20 is to adopt heat radiator 26, the pedestal 261 of this heat radiator 26 is close to the dorsal surface 252 of this reflecting plate 25, can directly the heat that fluorescent tube 24 produces be conducted to distributing behind a plurality of radiating fins 262 by heat conduction, these a plurality of fins 262 have increased area of dissipation, therefore can improve the internal heat dissipating effect of this down straight aphototropism mode set 20; Simultaneously, because the reflecting plate 25 of this down straight aphototropism mode set 20 does not have opening, its reflecting surface 251 is a full surface, projection light thereon all can be reflexed to diffuser plate 21, thereby make full use of light source, improve the brightness of this down straight aphototropism mode set 20.
Seeing also Fig. 3, is the diagrammatic cross-section of down straight aphototropism mode set second embodiment of the present invention.This down straight aphototropism mode set 30 is with the difference of the first embodiment down straight aphototropism mode set 20: it is leg-of-mutton projection 351 that reflecting plate 35 has a plurality of cross sections, the thickness of this projection 351 is big than the thickness of reflecting plate 35 other parts, therefore, screw 363 can be arranged on the position of this projection 351, with when the thinner thickness of reflecting plate 35, still can increase the bond strength of heat radiator 36 and reflecting plate 35; Therefore the base plate 371 of housing 37 and side plate 372 have a plurality of openings 373 and 374 respectively, and these a plurality of openings 373 and 374 can be better give out this down straight aphototropism mode set 30 by natural convection air with the heat of heat radiator 36 not at grade.
Seeing also Fig. 4, is the diagrammatic cross-section of down straight aphototropism mode set the 3rd embodiment of the present invention.This down straight aphototropism mode set 40 is with down straight aphototropism mode set 30 differences of second embodiment: the structure of the base plate of housing 47 for being recessed into to close reflecting plate 45 directions, wherein touch the pedestal 471 of the bottom parts of reflecting plate 45 as heat radiator, 473 of the radiating fins of heat radiator are arranged on this pedestal 471, so, the heat of this down straight aphototropism mode set 40 can directly give out this down straight aphototropism mode set 40.And side plate 472 height H of this housing 47 are more than or equal to the height H of this reflecting plate 45
1Height H with this radiating fin 473
2, so that the framework that side plate 472 surrounds can protect this radiating fin 473 to avoid collision and damage.
Claims (10)
1. down straight aphototropism mode set, comprise that diffuser plate and that a plurality of fluorescent tubes, are arranged on this fluorescent tube top is arranged on the reflecting plate of this fluorescent tube below, this reflecting plate has a reflecting surface and a dorsal surface, it is characterized in that: this down straight aphototropism mode set further comprises a heat radiator, this heat radiator has a pedestal and a plurality of fin that is arranged on this pedestal, and this pedestal is close to the dorsal surface of this reflecting plate.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this fluorescent tube is the cold cathode fluorescent lamp pipe.
3. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this diffuser plate is provided with a plurality of diffusing structures with respect to the position of fluorescent tube.
4. down straight aphototropism mode set as claimed in claim 1 is characterized in that: further comprise a housing, this housing is arranged on this heat radiator below and coats this reflecting plate and heat radiator.
5. down straight aphototropism mode set as claimed in claim 4 is characterized in that: this housing has a base plate and a plurality of side plate.
6. down straight aphototropism mode set as claimed in claim 5 is characterized in that: this base plate and side plate have a plurality of openings respectively.
7. down straight aphototropism mode set as claimed in claim 1 is characterized in that: comprise that further one has the housing of base plate and a plurality of side plates, the pedestal of this heat radiator is as the base plate of this housing, and this base plate is the structure that is recessed into near the reflecting plate direction.
8. down straight aphototropism mode set as claimed in claim 7 is characterized in that: the height of this housing side plate is more than or equal to the height of this reflecting plate and the height of this radiating fin.
9. down straight aphototropism mode set as claimed in claim 1 is characterized in that: the pedestal of this heat radiator by screw retention on reflecting plate.
10. down straight aphototropism mode set as claimed in claim 1 is characterized in that: it is leg-of-mutton projection that the reflecting surface of this reflecting plate has a plurality of cross sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100150842A CN100485478C (en) | 2004-01-05 | 2004-01-05 | Straight-down backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100150842A CN100485478C (en) | 2004-01-05 | 2004-01-05 | Straight-down backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1641436A true CN1641436A (en) | 2005-07-20 |
| CN100485478C CN100485478C (en) | 2009-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100150842A Expired - Fee Related CN100485478C (en) | 2004-01-05 | 2004-01-05 | Straight-down backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485478C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397201C (en) * | 2005-12-09 | 2008-06-25 | 群康科技(深圳)有限公司 | Backlight module group and liquid crystal display |
| CN100405150C (en) * | 2005-09-02 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Heat radiation module set and straight down type backlight system using same |
| CN100434999C (en) * | 2005-10-25 | 2008-11-19 | 三菱电机株式会社 | Planar light source and liquid crystal display device using the same |
| CN100462809C (en) * | 2005-11-17 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Direct lighting backlight module |
| CN102216672A (en) * | 2008-11-20 | 2011-10-12 | 夏普株式会社 | Illuminating device, display device and television receiving device |
| CN102563470A (en) * | 2012-02-21 | 2012-07-11 | 南京汇兴博业数字设备有限公司 | High-brightness temperature-adaptive direct-type cold cathode fluorescent lamp liquid crystal backlight module |
| CN101251681B (en) * | 2008-04-09 | 2012-09-19 | 友达光电股份有限公司 | Backlight module with supporting device |
| CN107203070A (en) * | 2017-07-19 | 2017-09-26 | 京东方科技集团股份有限公司 | A kind of composite membrane and preparation method thereof, backlight and display device |
| CN109445174A (en) * | 2019-01-02 | 2019-03-08 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof, display device |
| CN110208974A (en) * | 2019-05-29 | 2019-09-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of backlight box structure of combined type vehicle-carrying display screen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119746A (en) * | 1994-09-29 | 1996-04-03 | 北京市西城区新开通用试验厂 | Attracted top projector display device for industry control |
| DE29513401U1 (en) * | 1995-08-21 | 1996-12-19 | Bachleitner, Wolfgang, 78655 Dunningen | Display system |
| EP1460336B1 (en) * | 2001-12-25 | 2007-03-21 | Matsushita Electric Industrial Co., Ltd. | Illumination unit and liquid crystal display device using the unit |
| TW564302B (en) * | 2002-08-09 | 2003-12-01 | Au Optronics Corp | Back light unit with high heat transfer rate |
-
2004
- 2004-01-05 CN CNB2004100150842A patent/CN100485478C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405150C (en) * | 2005-09-02 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Heat radiation module set and straight down type backlight system using same |
| CN100434999C (en) * | 2005-10-25 | 2008-11-19 | 三菱电机株式会社 | Planar light source and liquid crystal display device using the same |
| CN100462809C (en) * | 2005-11-17 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Direct lighting backlight module |
| CN100397201C (en) * | 2005-12-09 | 2008-06-25 | 群康科技(深圳)有限公司 | Backlight module group and liquid crystal display |
| CN101251681B (en) * | 2008-04-09 | 2012-09-19 | 友达光电股份有限公司 | Backlight module with supporting device |
| CN102216672A (en) * | 2008-11-20 | 2011-10-12 | 夏普株式会社 | Illuminating device, display device and television receiving device |
| US8506148B2 (en) | 2008-11-20 | 2013-08-13 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN102563470A (en) * | 2012-02-21 | 2012-07-11 | 南京汇兴博业数字设备有限公司 | High-brightness temperature-adaptive direct-type cold cathode fluorescent lamp liquid crystal backlight module |
| CN107203070A (en) * | 2017-07-19 | 2017-09-26 | 京东方科技集团股份有限公司 | A kind of composite membrane and preparation method thereof, backlight and display device |
| CN107203070B (en) * | 2017-07-19 | 2021-03-02 | 京东方科技集团股份有限公司 | Composite film, manufacturing method thereof, backlight source and display device |
| CN109445174A (en) * | 2019-01-02 | 2019-03-08 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof, display device |
| CN109445174B (en) * | 2019-01-02 | 2022-04-29 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| CN110208974A (en) * | 2019-05-29 | 2019-09-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of backlight box structure of combined type vehicle-carrying display screen |
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| Publication number | Publication date |
|---|---|
| CN100485478C (en) | 2009-05-06 |
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| PB01 | Publication | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20180105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |