CN100351680C - Directly-down backlight assembly - Google Patents
Directly-down backlight assembly Download PDFInfo
- Publication number
- CN100351680C CN100351680C CNB2003101188556A CN200310118855A CN100351680C CN 100351680 C CN100351680 C CN 100351680C CN B2003101188556 A CNB2003101188556 A CN B2003101188556A CN 200310118855 A CN200310118855 A CN 200310118855A CN 100351680 C CN100351680 C CN 100351680C
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- CN
- China
- Prior art keywords
- backlight assembly
- type backlight
- direct type
- light source
- reflector plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000012958 reprocessing Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract 2
- 239000002918 waste heat Substances 0.000 abstract 1
- 210000002421 cell wall Anatomy 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a direct-down back light assembly with an optimal light source use rate and heat dissipation effective. The present invention comprises a light source, a frame and a reflecting sheet, wherein the light source is arranged in the frame, and the frame comprises at least one through hole; the reflecting sheet is arranged on the frame and is used for covering the through hole in the frame. Waste heat generated by the light source can be dissipated out of the frame through a heat dissipation hole of the reflecting sheet and the through hole.
Description
Technical field
The present invention relates to a kind of direct type backlight assembly, and be particularly related to the direct type backlight assembly of a kind of tool preferred light source utilization rate and radiating effect.
Background technology
Along with liquid crystal display (Liquid Crystal Display, LCD) industry is flourish, the product application of various display panels continues to increase, lighter and thinner product is constantly weeded out the old and bring forth the new.Because display panels is the display panel of non-self-luminosity, the function that must show by the light competence exertion that backlight assembly (backlight module) provided.
Generally speaking, backlight assembly can be divided into two kinds of side-light type and straight-down negatives according to the position at light source place.The side-light type backlight assembly is the side that light source is placed backlight assembly, with being intended to reduce the thickness of backlight assembly, so be used in the display such as portable electronic products such as mobile phone, PDA more.Direct type backlight assembly then is that light source is arranged at the display panels below, is to make display panels to have the intensity of light source preferably, so needing in the display of higher brightness as desktop PC and LCD TV etc. to be used for more.
With reference to Figure 1A, Figure 1A is the fragmentary cross-sectional view of the traditional direct type backlight assembly of expression.In Figure 1A, direct type backlight assembly 10 comprises a framework (bezel) 11, a reflector (reflecting plate orreflecting sheet) 12, a plurality of light source 13 and a diffuser plate (diffuser plate) 14.Light source 13 for example be cold-cathode tube (cold cathode fluorescent lamp, CCFL).Be formed with a containing groove 11a in the framework 11, reflector 12 is disposed on the cell wall 11c of the bottom land 11b of containing groove 11a and both sides in the mode of pasting.Cold-cathode tube 13 is parallel among the containing groove 11a, and is positioned at the top of reflector 12.Wherein, diffuser plate 14 is disposed at the top of cold-cathode tube 13.Reflector 12 is in order to being reflected by the light that cold-cathode tube 13 is launched, and diffuser plate 14 is then in order to will evenly being diffused on the panel of LCD by the light that cold-cathode tube 13 is launched.
Owing to can produce heat during cold-cathode tube 13 emission light, and the framework 11 of direct type backlight assembly 10 is generally enclosed areas, heat accumulation improves the temperature of direct type backlight assembly 10 in containing groove 11a, and then influences the briliancy performance of direct type backlight assembly 10.So generally can simultaneously on framework 11 and reflector 12, that is to say in the bottom land 11b of containing groove 11a and process separately to form a plurality of through holes 15.Through hole 15 is respectively with respect to cold-cathode tube 13 configuration, makes that air can convection current, the heat of direct type backlight assembly 10 is expelled to outside the framework 11, and reduces the temperature of direct type backlight assembly 10.
Yet the manufacture of general reflector 12 is divided into two kinds, and a kind of is direct spraying plating (coating) one deck reflectorized material on framework 11, and another kind of mode is to adopt the reflexive film of one deck tool, is attached on the framework 11.Therefore, when a plurality of through holes 15 take shape on the reflector 12, because reflector 12 material factors own are limited, generation one adds the condition restriction in man-hour, the aperture (D) that is to say through hole 15 must be greater than the thickness (T) of two times reflector 12, shown in Figure 1B, Figure 1B is the synoptic diagram of B part among expression Figure 1A.Thus, because this adds the condition restriction in man-hour, the large aperture of through hole 15 will make light leak outside from through hole 15 easily, produce light leakage phenomena, make the light source utilization rate of cold-cathode tube 13 reduce.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of direct type backlight assembly, with light source utilization rate and the tool radiating effect that improves backlight assembly simultaneously.
According to purpose of the present invention, a kind of direct type backlight assembly is proposed, comprise framework, reflector plate and light source.Framework is inner to form a containing groove, and is formed with at least one perforation that is outwards connected by containing groove on the framework.Reflector plate has a plurality of louvres, and reflector plate is disposed on the surface of the containing groove in the framework, in order to the perforation of shielding frame.Light source is arranged in the containing groove, and by the used heat that light source produced, can be earlier louvre by reflector plate, again via the perforation loss on the framework to framework.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail as follows:
Description of drawings
Figure 1A is the fragmentary cross-sectional view of the traditional direct type backlight assembly of expression.
Figure 1B is the synoptic diagram of B part among expression Figure 1A.
Fig. 2 is the fragmentary cross-sectional view of expression according to the direct type backlight assembly of one embodiment of the present invention.
Fig. 3 is the fragmentary cross-sectional view of expression according to another direct type backlight assembly of one embodiment of the present invention.
The drawing reference numeral explanation:
10,20,30: direct type backlight assembly
11,21,31: framework
11a, 21a; Containing groove
11b, 21b: bottom land
11c, 21c: cell wall
12: reflector
13,23,33: light source
14,24: diffuser plate
15: through hole
22,32: reflector plate
25,35: perforation
29,39: louvre
Embodiment
With reference to Fig. 2, Fig. 2 is the fragmentary cross-sectional view of representing according to the direct type backlight assembly of one embodiment of the present invention.Among the embodiment of Fig. 2, direct type backlight assembly 20 comprises a framework (bezel) 21, a reflector plate (reflecting sheet) 22 and a plurality of light source 23.Framework 21 inner formation one containing groove 21a, and be formed with at least one perforation 25 that outwards connects by containing groove 21a on the framework 21.The shape of perforation 25 preferably can be long rectangle, a plurality of perforation 25 preferably are arranged in parallel each other, and basically with respect to light source 25 configurations, yet the present invention is not limited by this, the perforation of other shape, size all can be adjusted according to this according to actual effect or demand, with the intensity of keeping framework 21 within the acceptable range, and reach preferred radiating effect.
Be noted that the louvre 29 on the reflector plate 22 of present embodiment explains to do to concentrate the mode that distributes to be configured to example with respect to perforation 25, but the present invention is not as limit.Louvre 29 on the reflector plate also can be even distribution, or is to distribute arbitrarily.
By configuration of the present invention, 23 aperture is little owing to bore a hole in the aperture of louvre 29, so light is difficult for leaking outside, and can effectively reduce light leakage phenomena, and improve the light source utilization rate of cold-cathode tube 13.Simultaneously, because can and boring a hole by louvre 29, the air of the containing groove 21a inside of direct type backlight assembly 20 25 carries out convection current, make the used heat that light source 23 is produced during light in emission, can pass through louvre 29 earlier, again by boring a hole 25 loss to framework 21, make that the direct type backlight assembly 20 interior heats that gathered are discharged, and then improve the briliancy demonstration of direct type backlight assembly 20.
The another kind of practice, with reference to Fig. 3, Fig. 3 is the fragmentary cross-sectional view of expression according to another direct type backlight assembly of one embodiment of the present invention.In Fig. 3, direct type backlight assembly 30 is similar to direct type backlight assembly 20, and unique different be the manufacture of reflector plate.The reflector plate 32 that direct type backlight assembly 30 is included for example is to utilize a poriness reflective film (porous reflecting film) as reflector plate 32, and directly this reflector plate 32 is attached on the framework 31, with the perforation 35 of shielding frame 31.By the reflector plate 32 that porous film constituted, it is distributed in louvre 39 wherein, can make the cross-ventilation that is positioned at direct type backlight assembly 30 inside, the used heat that light source 33 is produced when emission light, can pass through louvre 39 earlier, again by perforation 35 loss of framework 31 to framework 31, make that the direct type backlight assembly 30 interior heats that gathered are discharged, can reach the light source utilization rate that improves direct type backlight assembly 30 equally, and the tool radiating effect, and and then improve the purpose of the briliancy performance of direct type backlight assembly 30.
In addition, invention spirit of the present invention is not limited to the light source of above-mentioned cold-cathode tube, also promptly in direct type backlight assembly, the design of the perforation of framework and the louvre of reflector plate, except above-mentioned being used on a plurality of cold-cathode tubes, to produce outside the good heat radiation function, also can promote its radiating effect for planar light source.
The disclosed direct type backlight assembly of the above embodiment of the present invention is by the perforation in the reflector plate shielding frame, make used heat that light source produces can be earlier louvre by reflector plate, again via the perforation loss to framework.As can be known, compare with known direct type backlight assembly 10 after implementing with reality with direct type backlight assembly 20 accessible effects of the present invention, effect of the present invention can make the temperature of direct type backlight assembly reduce at least Celsius 5 spend more than.On the other hand, because reflector plate 22 has the effect of shielding perforation 25, the aperture of the louvre 29 on the reflector plate 22 is less, makes that light is difficult for being leaked outside by louvre 29, produces light leakage phenomena, makes the utilization rate of light source 23 be improved.Thus, the practice of the present invention can effectively improve simultaneously the light source utilization rate and the tool radiating effect of direct type backlight assembly really, and and then the briliancy that can improve direct type backlight assembly show.
In sum; though the present invention discloses as above with a preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; certainly can do various changes and retouching, so being as the criterion of should being defined with claims scope of applying for a patent of protection scope of the present invention.
Claims (12)
1. direct type backlight assembly comprises:
The one inner framework that forms a containing groove, this framework is formed with at least one perforation that is outwards connected by this containing groove;
One has the reflector plate of louvre, and this reflector plate is disposed on the surface of this containing groove in this framework, in order to shield this perforation of this framework; And
One is arranged at the light source in this containing groove, and the used heat that this light source produced is earlier by those louvres on this reflector plate, again via this perforation loss on this framework to this framework.
2. direct type backlight assembly as claimed in claim 1 is characterized in that: this perforation is basically with respect to this light source configuration.
3. direct type backlight assembly as claimed in claim 1 is characterized in that: the shape of this perforation is a long rectangle.
4. direct type backlight assembly as claimed in claim 1 is characterized in that: those louvres of this reflector plate are with respect to the concentrated distribution of this light source.
5. direct type backlight assembly as claimed in claim 1 is characterized in that: those louvres of this reflector plate are with respect to the concentrated distribution of this perforation.
6. direct type backlight assembly as claimed in claim 1 is characterized in that: those louvres of this reflector plate evenly distribute.
7. direct type backlight assembly as claimed in claim 1 is characterized in that: those louvres of this reflector plate distribute arbitrarily.
8. direct type backlight assembly as claimed in claim 1 is characterized in that: the material of this reflector plate is a poriness reflective film.
9. direct type backlight assembly as claimed in claim 1 is characterized in that: this reflector plate is with the reflexive thin plate reprocessing of tool moulding, to form those louvres.
10. direct type backlight assembly as claimed in claim 1 is characterized in that: the pore diameter range of those louvres is about 0.15～2 millimeter (mm).
11. direct type backlight assembly as claimed in claim 1 is characterized in that: this light source is a cold-cathode tube.
12. direct type backlight assembly as claimed in claim 1 is characterized in that: this light source is a planar light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101188556A CN100351680C (en) | 2003-11-28 | 2003-11-28 | Directly-down backlight assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101188556A CN100351680C (en) | 2003-11-28 | 2003-11-28 | Directly-down backlight assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1547065A CN1547065A (en) | 2004-11-17 |
| CN100351680C true CN100351680C (en) | 2007-11-28 |
Family
ID=34338055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101188556A Expired - Lifetime CN100351680C (en) | 2003-11-28 | 2003-11-28 | Directly-down backlight assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100351680C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI268388B (en) | 2005-03-11 | 2006-12-11 | Au Optronics Corp | Backlight module |
| CN100388078C (en) * | 2005-03-29 | 2008-05-14 | 友达光电股份有限公司 | Backlight module |
| CN100376975C (en) * | 2005-10-21 | 2008-03-26 | 友达光电股份有限公司 | Back light module and liquid crystal display device using same |
| CN101498409B (en) * | 2007-09-29 | 2012-04-04 | 京东方科技集团股份有限公司 | Backlight device |
| KR102629991B1 (en) * | 2019-07-08 | 2024-01-29 | 삼성전자주식회사 | Display apparatus |
| CN114141163B (en) * | 2021-12-08 | 2023-08-18 | 上饶市智慧光彩科技有限公司 | Lamp panel structure and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11126028A (en) * | 1997-10-23 | 1999-05-11 | Hitachi Ltd | Liquid crystal display device |
| JPH11218754A (en) * | 1998-01-29 | 1999-08-10 | Yazaki Corp | Back light device |
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JP2000207917A (en) * | 1999-01-14 | 2000-07-28 | Samsung Electronics Co Ltd | Backlight assembly for liquid crystal display device module |
| CN2546911Y (en) * | 2002-04-10 | 2003-04-23 | 廖骏吉 | Negative phototropic cover radiating structure |
-
2003
- 2003-11-28 CN CNB2003101188556A patent/CN100351680C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6089739A (en) * | 1997-09-30 | 2000-07-18 | Sony Corporation | Surface light source device |
| JPH11126028A (en) * | 1997-10-23 | 1999-05-11 | Hitachi Ltd | Liquid crystal display device |
| JPH11218754A (en) * | 1998-01-29 | 1999-08-10 | Yazaki Corp | Back light device |
| JP2000207917A (en) * | 1999-01-14 | 2000-07-28 | Samsung Electronics Co Ltd | Backlight assembly for liquid crystal display device module |
| CN2546911Y (en) * | 2002-04-10 | 2003-04-23 | 廖骏吉 | Negative phototropic cover radiating structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1547065A (en) | 2004-11-17 |
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Granted publication date: 20071128 |
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| CX01 | Expiry of patent term |