CN2630893Y - Direct-down back light source module - Google Patents
Direct-down back light source module Download PDFInfo
- Publication number
- CN2630893Y CN2630893Y CN 03264908 CN03264908U CN2630893Y CN 2630893 Y CN2630893 Y CN 2630893Y CN 03264908 CN03264908 CN 03264908 CN 03264908 U CN03264908 U CN 03264908U CN 2630893 Y CN2630893 Y CN 2630893Y
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- light
- backlight module
- type backlight
- described direct
- fluorescent tube
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Abstract
The creation relates to a down-backlight module that is to solve the acknowledged problem that exit-light luminance is uneven for the down-backlight module. The technology to solve the problem is that the backlight module includes lamps and shading panels that are arranged on the position of the relative lamps. The shading panels reduce the lightness of the luminance of the relative lamps by blocking way and also by reflective way to achieve the purpose of reducing the luminance. The reflected light can be reflected to the space between the two lamps to enhance the luminance there by the reflective structure that is arranged below the lamps. So the luminance of the panel is more uniform, the picture looks more uniform and compliance.
Description
Technical field
This creation is a kind of direct-light-type backlight module, refers to a kind of backlight module structural design with uniform planar bright dipping briliancy especially.
Background technology
Plurality of advantages such as at present LCD is carried under one's arms gently, approached, the no width of cloth is penetrated are challenged traditional monitor market, also successfully bring infinite commercial opportunities for industrial community, worker, commerce, and in today of how tame manufacturer competition, how effectively improving its product image display quality will be the main advantage of meeting numerous adversarys head-on.
Because liquid crystal itself is not had a characteristics of luminescence, so need be aided with member backlight show image smoothly, this kind member backlight is commonly referred to as backlight module, and just making Backlight For Liquid Crystal Display Panels building block technique generally can be divided two kinds at present:
(1) side incident type:
Seeing also shown in Figure 7ly, is to disclose a known side light-in backlight modular structure, and the below that it is located at a liquid crystal panel 50 includes a straight pipe type light source 60, a light guide plate 61, a reflector plate 62, a diffusion barrier sheet 63 and prism element 64; Wherein this straight pipe type light source 60 is side end of being located at this light guide plate 61, light source is entered in the light guide plate 61 by the side, and can utilize the reflective structure that is arranged at light guide plate 61 bottoms and the reflector plate 62 of below, light reflection is entered liquid crystal panel 50 or pass to the light source of reflector plate 62 again in the reflected back light guide plate 61 by light guide plate 61, increase its light-conductive rate, adjust light source dispersion degree and angle of visibility through diffusion barrier sheet 63 and prism element 64 again, so that light can be accumulated in the design angle of visibility scope of LCD, with the requirement of fluid,matching crystal display to optical characteristics.Yet this kind uses side incident type backlight liquid crystal display because the restriction of light guide plate 61 thickness can't increase the fluorescent tube quantity that is placed in side, and corresponding when being used in the large scale liquid crystal display, has the also not enough phenomenon of light source deficiency and briliancy.
(2) straight-down negative:
Seeing also shown in Figure 8ly, is to disclose a direct-light-type backlight module structure, and it includes a box body 70, plural number and is flat on a fluorescent tube 71 in the box body 70 and a diffuser plate 72 etc.; The back side (not shown) of these box body 70 corresponding liquid crystal panels, because fluorescent tube 71 is flat in the box body 70, so can provide liquid crystal panel one planar light source, therefore, fluorescent tube 71 quantity can increase with the liquid crystal panel size, to provide sufficient light source to give liquid crystal panel, yet, this kind direct-light-type backlight module only utilizes the reflection horizon (not label) of box body 70 inner bottom surfaces, with the light emission rate that provides fluorescent tube to make progress, but make the direct bright dipping of light directly over the relative fluorescent tube 71 of liquid crystal panel and make briliancy brighter, and the briliancy in zone is darker between two fluorescent tubes, cause planar light source the problem of unevenness of brightness to occur, in addition, because diffuser plate and fluorescent tube need keep a segment distance, make diffuser plate present default light diffusion effect, make the evenly effect of diffusion of light if cross near still can't reaching with fluorescent tube, therefore, the thickness of this direct-light-type backlight module can't reduce.
From the above, large-sized LCD though direct-light-type backlight module suits to be applied to, to provide enough back lights to give the LCD of top, so, this direct-light-type backlight module then need use many straight tube fluorescent tubes or folding type fluorescent tube, but, because of fluorescent tube sends light source with radiation mode, and the briliancy of the close fluorescent tube area just above of display panel is bright than briliancy regional between two fluorescent tubes, so present bright, the phenomenon that dark luminance nonuniformity is even, and then the image brilliance that makes LCD present is inhomogeneous is by being as can be known, direct-light-type backlight module should further be improved, to provide LCD better image display quality.
The utility model content
This creator is because the LCD of aforementioned known direct-light-type backlight module has the defective of image brightness inequality, so the fundamental purpose of this creation is for a kind of novel direct-light-type backlight module structure is provided, order uses the LCD of this backlight module to have uniform brilliance, and real high-quality image is provided.
This creation secondary objective provides a kind of backlight module of high briliancy.
This creation purpose again provides a kind of direct-light-type backlight module of thin type structure.
For achieving the above object, a kind of direct-light-type backlight module that the utility model provides includes:
One box body is the end face side backlight that is arranged at this liquid crystal panel;
At least one light source is to be arranged at a box bottom, with the incidence surface of corresponding liquid crystal panel;
At least one shadow shield is to have the effect that shuts out the light, and is formed with plural photic zone on each shadow shield, and the corresponding top that is arranged at fluorescent tube;
Above-mentioned each shadow shield fluorescent tube stops that respectively the part radiating light of fluorescent tube top penetrates, with reduce with two fluorescent tubes between the contrast of briliancy secretly.
Described direct-light-type backlight module is formed with plural photic zone on each shadow shield.
Described direct-light-type backlight module, the shape of each shadow shield can be curved surface or plane.
Described direct-light-type backlight module, the material of each shadow shield can be transparent, translucent or high reflection transparent materials.
Described direct-light-type backlight module, this light source are to be straight pipe type fluorescent tube or folding type fluorescent tube.
Further form at least one reflection configuration in the described direct-light-type backlight module, this box bottom, each reflection configuration is corresponding each light source position.
Described direct-light-type backlight module, this box body upper shed further is provided with a diffuser plate, is positioned on the shadow shield.
Described direct-light-type backlight module, this box body upper shed further is provided with a diffusion barrier sheet, is to be positioned at the diffuser plate top.
Described direct-light-type backlight module, this box body upper shed further is provided with a prismatic lens, is to be positioned on the diffuser plate.
Described direct-light-type backlight module, folding type fluorescent tube can be W or U-shaped formula.
Described direct-light-type backlight module, each reflection configuration are the center with the center line, and its both sides are formed with the dip plane towards dark briliancy zone.
Described direct-light-type backlight module, this dip plane are to can be concave curved surface, convex surface or plane.
Described direct-light-type backlight module, this projection are one-body molded with the box body bottom.
In sum, the major technique means that realize the utility model above-mentioned purpose are to make this direct-light-type backlight module be located at the incidence surface side of this liquid crystal panel, give the liquid crystal panel of top with the planar light source that uniform brilliance is provided, be mainly by at least one light tube group, at least one shadow shield and diffuser plate are formed, wherein this fluorescent tube can be array straight pipe type fluorescent tube or folding type fluorescent tube, a box bottom is located in its storing, and the shadow shield of tool shaded effect is arranged at the top of fluorescent tube with form one to one, and this diffuser plate is located on the shadow shield again, with the bright dipping of further diffusion below fluorescent tube, to reach even bright dipping briliancy.
Because the light source of backlight module is to use fluorescent tube, so light penetrates radially, and the corresponding fluorescent tube of plane liquid crystal panel directly over the position be to be bright briliancy zone, the zone then is dark briliancy zone between two fluorescent tubes, therefore, by by the shadow shield directly over each fluorescent tube section of each fluorescent tube or folding type fluorescent tube, the part light that penetrates directly over the fluorescent tube can be stopped, with and fluorescent tube between to compare down brightness contrast more approaching in dark briliancy zone, that is, look by the exiting surface of LCD, can obtain bright dipping briliancy uniformly, moreover, more can between fluorescent tube and box bottom, establish one deck reflector plate, make the fluorescent tube below penetrate light and can be utilized as back light, if this shadow shield then can reflect directly over the fluorescent tube under the portions of light alignment for high reflection material, also can utilize this moment the reflector plate of below that light is reflexed to zone between two fluorescent tubes, make that the briliancy in zone promotes between two fluorescent tubes, strengthen the briliancy of LCD bright dipping; Again, this diffuser plate is average in addition with fluorescent tube bright dipping briliancy because of shadow shield, so the distance of diffuser plate and fluorescent tube is furthered, the thickness of reduction backlight module, therefore, the direct-light-type backlight module of this creation has height and uniform bright dipping briliancy, and thickness also can be reduced and becomes a slim backlight module.
Description of drawings
Fig. 1 is this partial sectional view of creating first preferred embodiment;
Fig. 2 is this partial sectional view of creating second preferred embodiment;
Fig. 3 is the synoptic diagram of Fig. 2 fluorescent tube opticpath;
Fig. 4 is the clear area vertical view of this creation shadow shield;
Fig. 5 (A)～Fig. 5 (D) is the vertical view of this creation backlight module;
Fig. 6 (A), Fig. 6 (B) are the briliancy distribution plans that has, do not have the backlight module that adds the geometric modelling reflection configuration;
Fig. 7 is the LCD exploded view of known tool side incident type backlight module;
Fig. 8 is the part exploded view of known direct-light-type backlight module.
Embodiment
This creation is a kind of direct-light-type backlight module, see also shown in Figure 1, be the three-dimensional partly exploded view of creating first preferred embodiment for this, this backlight module 20 is incidence surface 12 sides of being located at a liquid crystal panel 10, gives the liquid crystal panel 10 of top with the planar light source that uniform brilliance is provided; It includes:
One box body 21 is incidence surface 12 sides that are arranged at this liquid crystal panel 10;
At least one light source, be to be flat on a box body 21 inner faces, can be at least one straight pipe type fluorescent tube 22 (as Fig. 5 (A)) or at least one folding type fluorescent tube 22 and form, this folding type fluorescent tube can be a W shape or many/single U-shaped folding type fluorescent lamp shown in Fig. 5 (B), Fig. 5 (C) and Fig. 5 (D);
At least one shadow shield 30, it is the corresponding respectively top of being located at fluorescent tube 22, has the effect that shuts out the light, be formed with plural photic zone 31 on each shadow shield 30 again, the shape of wherein plural photic zone 31 is not limit, again to each other between apart from also not limitting, look closely the liquid crystal panel 10 required briliancy of application and adjusted again; In present embodiment, as shown in Figure 4, this photic zone 31 is to be made of the size perforation that forms on the shadow shield 30; Again, each shadow shield 30 is the tops that are arranged at fluorescent tube 22 one to one, and it is shaped as curved surface and also can be the plane, and its material can be transparent, translucent or high reflection transparent materials etc. again.
Above-mentioned liquid crystal display device structure is main by the bright dipping of uniform brilliance is provided by the direct-light-type backlight module 20 of below.Because the light source of backlight module 20 is to use fluorescent tube, so light is emanant ejaculation, and liquid crystal panel 10 corresponding fluorescent tubes 22 directly over the position be to be bright briliancy zone 100,22 of two fluorescent tubes then are dark briliancy zone 101, and therefore, the shadow shield 30 of each fluorescent tube top is the part light that stops the top ejaculation of fluorescent tube 22, make backlight module 20 to go out the optical plane briliancy more even, that is, look it by the exiting surface 11 of liquid crystal panel 10, can obtain more uniform bright dipping briliancy.
Again, also can on shadow shield 30, have additional members such as diffuser plate 23, diffusion barrier sheet, prismatic lens be not shown in the figures more in regular turn, to reach more uniform briliancy, because diffuser plate 23 is average for further using brilliant degree, therefore, if directly be arranged on the fluorescent tube 22, itself and fluorescent tube 22 need to keep certain distance, yet, the briliancy that this creation utilizes shadow shield 30 to disperse fluorescent tube 22 to send in advance, therefore, though diffuser plate 23 is located on the shadow shield 22, but and the distance of 22 of fluorescent tubes can further further, and the thickness of complete backlight module 20 is reduced.
Seeing also shown in Figure 2ly, is to create second preferred embodiment for this, and the structure that itself and Fig. 1 disclose is close, only forms at least one reflection configuration 40 on box body 21 bottom surfaces.See also shown in Figure 3, fluorescent tube 22 positions of this reflection configuration 40 corresponding tops, the light that is subjected to shadow shield 30 reflections with the light that reflects each fluorescent tube 22 below radiation and top.Reflection configuration 40 is to be geometric configuration, light can be strengthened being projected to the dark briliancy zone 101 of 20 of fluorescent tubes, increases this zone bright dipping briliancy.
The center line of above-mentioned reflection configuration 40 is fluorescent tube 22 positions over against the top, and is that the center forms a dip plane 41 in both sides with center line 42, and this dip plane can be concave curved surface, convex surface or plane; Again, this reflection horizon 40 can be one-body molded with box body 21 bottoms.
Seeing also shown in Fig. 6 (A), Fig. 6 (B), is for increasing the curve map of optical analogy briliancy before and after this reflection configuration, and obviously as can be known, the light that increases the bright dipping shown in backlight module Fig. 6 (B) that reflection configuration is arranged is more average than Fig. 6 (A).
In sum, this creation provides a kind of novel direct-light-type backlight module, owing to designed the member of shadow shield, effectively adjusting the emanant light source of fluorescent tube is the planar light source of uniform brilliance, to improve the unevenness of brightness of known LCD, and the inferior shortcoming of image quality, the penetration structure Design more increases the briliancy of planar light source integral body again, in addition, because the use of shadow shield, disperse fluorescent tube light in advance and make regional briliancy bright, dark difference is gone out little, so diffuser plate reduced and fluorescent tube between distance, can reach the function of further even bright dipping briliancy equally, and then dwindle the thickness of backlight module, become slim direct-light-type backlight module.
Claims (13)
1, a kind of direct-light-type backlight module is characterized in that, is to include:
One box body is the end face side backlight that is arranged at this liquid crystal panel;
At least one light source is to be arranged at a box bottom;
At least one shadow shield is formed with plural photic zone on each shadow shield, and the corresponding top that is arranged at fluorescent tube.
2, according to the described direct-light-type backlight module of claim 1, it is characterized in that, be formed with plural photic zone on each shadow shield.
3, according to claim 1 or 2 described direct-light-type backlight modules, it is characterized in that the shape of each shadow shield can be curved surface or plane.
According to the described direct-light-type backlight module of claim 3, it is characterized in that 4, the material of each shadow shield can be transparent, translucent or high reflection transparent materials.
According to the described direct-light-type backlight module of claim 1, it is characterized in that 5, this light source is to be straight pipe type fluorescent tube or folding type fluorescent tube.
According to the described direct-light-type backlight module of claim 1, it is characterized in that 6, further form at least one reflection configuration in this box bottom, each reflection configuration is corresponding each light source position.
According to the described direct-light-type backlight module of claim 6, it is characterized in that 7, this box body upper shed further is provided with a diffuser plate, is positioned on the shadow shield.
According to the described direct-light-type backlight module of claim 7, it is characterized in that 8, this box body upper shed further is provided with a diffusion barrier sheet, is to be positioned at the diffuser plate top.
According to claim 7 or 8 described direct-light-type backlight modules, it is characterized in that 9, this box body upper shed further is provided with a prismatic lens, is to be positioned on the diffuser plate.
According to the described direct-light-type backlight module of claim 5, it is characterized in that 10, the folding type fluorescent tube can be W or U-shaped formula.
According to the described direct-light-type backlight module of claim 6, it is characterized in that 11, each reflection configuration is the center with the center line, its both sides are formed with the dip plane towards dark briliancy zone.
According to the described direct-light-type backlight module of claim 11, it is characterized in that 12, this dip plane is to can be concave curved surface, convex surface or plane.
According to the described direct-light-type backlight module of claim 6, it is characterized in that 13, this projection is one-body molded with the box body bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03264908 CN2630893Y (en) | 2003-06-02 | 2003-06-02 | Direct-down back light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03264908 CN2630893Y (en) | 2003-06-02 | 2003-06-02 | Direct-down back light source module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630893Y true CN2630893Y (en) | 2004-08-04 |
Family
ID=34297551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03264908 Expired - Fee Related CN2630893Y (en) | 2003-06-02 | 2003-06-02 | Direct-down back light source module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2630893Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7438436B2 (en) | 2005-08-05 | 2008-10-21 | Lg Display Co., Ltd. | Backlight unit |
| CN103062710A (en) * | 2011-10-18 | 2013-04-24 | 北京莱易龙光电科技有限公司 | Module type light source box device for light box |
| CN103511925A (en) * | 2013-09-18 | 2014-01-15 | 上海向隆电子科技有限公司 | Thin direct-lighting type backlight module |
| CN108591894A (en) * | 2018-06-11 | 2018-09-28 | 北京小米移动软件有限公司 | Lamp cap and lamps and lanterns |
| CN115220261A (en) * | 2022-06-09 | 2022-10-21 | 武汉华星光电技术有限公司 | Backlight module and display module |
-
2003
- 2003-06-02 CN CN 03264908 patent/CN2630893Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7438436B2 (en) | 2005-08-05 | 2008-10-21 | Lg Display Co., Ltd. | Backlight unit |
| CN103062710A (en) * | 2011-10-18 | 2013-04-24 | 北京莱易龙光电科技有限公司 | Module type light source box device for light box |
| CN103511925A (en) * | 2013-09-18 | 2014-01-15 | 上海向隆电子科技有限公司 | Thin direct-lighting type backlight module |
| CN108591894A (en) * | 2018-06-11 | 2018-09-28 | 北京小米移动软件有限公司 | Lamp cap and lamps and lanterns |
| CN108591894B (en) * | 2018-06-11 | 2024-03-12 | 北京小米移动软件有限公司 | Lamp cap and lamp |
| CN115220261A (en) * | 2022-06-09 | 2022-10-21 | 武汉华星光电技术有限公司 | Backlight module and display module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |