CN100368893C - Directly downward thin back light module - Google Patents
Directly downward thin back light module Download PDFInfo
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- CN100368893C CN100368893C CNB031101690A CN03110169A CN100368893C CN 100368893 C CN100368893 C CN 100368893C CN B031101690 A CNB031101690 A CN B031101690A CN 03110169 A CN03110169 A CN 03110169A CN 100368893 C CN100368893 C CN 100368893C
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- fluorescent tube
- backlight module
- type backlight
- light
- direct type
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Abstract
The present invention provides a direct-down back light module. The present invention at least comprises a lamp tube, a reflecting plate, a diffuser plate and a reflecting layer, wherein the reflecting plate is arranged below the lamp tube; the diffuser plate is arranged above the lamp tube, the diffuser plate comprises a first zone and a second zone, the first zone is corresponding to the upper surface of the lamp tube, and the second zone is contiguous to the first zone; a part of the reflecting layer is covered on the upper surface of the lamp tube to shade part of light which is emitted from the upper surface, and the light is reflected to the reflecting plate and is reflected to the second zone through the reflecting plate.
Description
Technical field
The present invention relates to a kind of direct type backlight module, particularly relate to a kind of slimming direct type backlight module.
Background technology
Flourish along with global lcd technology (LCD) industry, LCD panel product application continues to increase, lighter and thinner product is constantly weeded out the old and bring forth the new.The backlight module of one of key part and component (backlight module), no matter also fast-developing thereupon on technology and manufacture craft, to provide liquid crystal panel required light source.
According to light source position, backlight module can be divided into side type (edge type) and straight-down negative (directtype); The fluorescent tube of side type backlight module has been adopted monolateral or bilateral setting, and see through light guide plate and guide the scattering of light direction so that the face light source to be provided, and direct type backlight module has several fluorescent tubes, is set in parallel in the bottom of lamp box, makes light source directly upwards be projected to the diffuser plate of top.Because the brightness of side type backlight module is lower, be fit to compact product; If for the product of large-size, need to adopt direct type backlight module so that enough brightness to be provided, yet the ubiquitous problem of direct type backlight module is that thickness is too thick, then can influence all and spend together as reducing integral thickness design in.
Please refer to Fig. 1, it illustrates the side view and the corresponding brightness value thereof of traditional direct type backlight module.Direct type backlight module has a lamp box 100, has a plurality of fluorescent tubes 102 in the lamp box 100.Fluorescent tube 102 utilizes silicon rubber (silicon rubber) that its two ends are fixed in the lamp box 100, makes fluorescent tube 102 be arranged at the back of liquid crystal panel fifty-fifty, so just can make the full wafer liquid crystal panel can both have sufficient backlight, to show preferable image display quality.Fig. 1 top curve is with the brightness value of vertical lamp tube side to the measurement direct type backlight module, shows that direct type backlight module is in the corresponding brightness value of diverse location; Please earlier with reference to Fig. 2, it illustrates adjacent two fluorescent tubes of the direct type backlight module among Fig. 1, the synoptic diagram of the part opticpath that it upwards penetrates.In Fig. 2, the area just above of fluorescent tube 102a and 102b has the light of comparatively dense than the upper area between two fluorescent tube 102a and 102b, so light luminance is also stronger.Therefore, the corresponding brightness value of the area just above of fluorescent tube is than the brightness value height of the upper area between fluorescent tube and fluorescent tube, and present as the squiggle above Fig. 1 along with the diverse location of direct type backlight module, wherein brightness value is between b1 and b2, the face light source of making has produced light and dark non-uniform phenomenon, and is brighter and darker between fluorescent tube and fluorescent tube directly over the fluorescent tube.Especially, when the thickness of direct type backlight module is thinner, the difference of b1 and b2 is bigger, will make above-mentioned phenomenon especially obvious, has a strong impact on all spending together of direct type backlight module.
Summary of the invention
The object of the present invention is to provide a kind of slimming direct type backlight module, improve all spending together of direct type backlight module, effectively reduce integral thickness according to this.
According to purpose of the present invention, a kind of direct type backlight module is proposed, comprise at least: fluorescent tube, reflecting plate, diffuser plate, reflection horizon.Reflecting plate is arranged at the below of fluorescent tube; Diffuser plate is arranged at the top of fluorescent tube, comprises a first area and a second area, and wherein the first area is corresponding to the upper surface of fluorescent tube, and second area is in abutting connection with the first area; The local upper surface that covers fluorescent tube in reflection horizon from the light that upper surface penetrates, so that light reflexes to reflecting plate, reflexes to second area via reflecting plate with light in order to shaded portions again.
Description of drawings
Fig. 1 is the side view and the corresponding brightness value thereof of traditional direct type backlight module;
Fig. 2 is the fluorescent tube of the direct type backlight module among Fig. 1, the synoptic diagram of the part opticpath that it upwards penetrates;
Fig. 3 is the perspective view of the slimming direct type backlight module of a preferred embodiment of the present invention;
Fig. 4 is the fluorescent tube of the slimming direct type backlight module among Fig. 3, the synoptic diagram of the part opticpath that it upwards penetrates;
Fig. 5 A and Fig. 5 B are the partial enlarged drawing of region R among Fig. 3.
Embodiment
The upper surface that the present invention is directed to fluorescent tube is handled, and adopt to apply the mode of one deck reflecting material, make fluorescent tube to directly over the part light that penetrates earlier after reflecting downwards, by the reflecting plate of fluorescent tube below light is secondary reflected to zone between fluorescent tube and fluorescent tube again; Keeping under the constant situation of luminous energy, utilize reflection process with fluorescent tube to directly over the part light that penetrates be dispersed to zone between fluorescent tube and fluorescent tube.
Please refer to Fig. 3, it illustrates the perspective view according to the slimming direct type backlight module of a preferred embodiment of the present invention.The slimming direct type backlight module comprises a lamp box 300, has a plurality of via surface-treated fluorescent tube 302 in the lamp box 300.Fig. 4 illustrates the fluorescent tube of the slimming direct type backlight module among Fig. 3, the synoptic diagram of the part opticpath that it upwards penetrates.Please be simultaneously with reference to Fig. 3 and Fig. 4, reflecting plate 306 is arranged at the inside bottom surface of lamp box 300, and adjacent two fluorescent tube 302a and 302b are set in parallel in the top of this reflecting plate 306 and the below of diffuser plate 308.Fluorescent tube 302a and 302b have upper surface 304a and 304b respectively.Diffuser plate 308 comprises first area A, B and second area N1, N2, N3, and wherein first area A, B be corresponding to the upper surface of fluorescent tube 302a and 302b, and second area N1, N2, N3 are in abutting connection with first area A, B.
As shown in Figure 4, fluorescent tube 302a and 302b have reflection horizon 304a and 304b after via surface treatment, the local upper surface that covers fluorescent tube 302a and 302b, the light La and the Lb that penetrate from upper surface in order to shaded portions.With fluorescent tube 302a is example, and wherein the light La corresponding to first area A and upwards irradiation at first is subjected to covering of reflection horizon 304a and reflexes to reflecting plate 306 downwards, by reflecting plate 306 light La is reflexed to second area N2 again; In view of the above, fluorescent tube 302a to directly over penetrate and corresponding to the light La of first area A, by covering of reflection horizon 304a the brightness value directly over the fluorescent tube 302a is reduced, and the process of the luminous energy of being covered by secondary reflection is dispersed to the second area N2 between fluorescent tube and the fluorescent tube, and make the brightness value of the upper area between fluorescent tube and fluorescent tube improve, to dwindle the gap between maximum brightness value b1 and minimum brightness value b2.Therefore, by design of the present invention, can keep under the constant situation of light gross energy, utilize reflection process with fluorescent tube to directly over the part light that penetrates be dispersed to zone between fluorescent tube and fluorescent tube, make the emitted light of fluorescent tube comparatively to be evenly distributed on the diffuser plate.
Please refer to Fig. 5 A and Fig. 5 B, illustrate the partial enlarged drawing of region R among Fig. 3.The local reflection horizon that covers fluorescent tube 302 upper surfaces comprises several reflector elements, in order to the light of shaded portions from this fluorescent tube 302 upper surfaces ejaculation, so that this light is dispersed to the side space of fluorescent tube 302 by reflection process.The material of reflector element is a metallic compound, can preferably adopt the sputter mode of vacuum plating to be coated on the upper surface of fluorescent tube.And this each reflector element is covered in the upper surface of fluorescent tube 302 in discontinuous mode, and mode is adhered to can to adopt Discrete Distribution, be spaced etc., to avoid producing the possibility of electric leakage.And the thickness of reflector element itself or the density degree between reflector element need be looked lamp house thickness and be done suitable adjustment.Reflector element preferably can be the list structure 504 shown in the circular configuration 502 shown in Fig. 5 A, Fig. 5 B, yet not limited by this, the reflector element of other shape, size, density all can be adjusted according to this according to actual effect or demand, to keep all degree together within the acceptable range.Especially, directly surface of the light tube the is covered practice of one deck reflecting material of the present invention, can effectively improve all spending together of direct type backlight module, and then in design, can reduce the integral thickness of direct type backlight module, provide the concrete all neat degree of slimming straight-down negative lamp box to improve countermeasure.
In sum; though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to limit the present invention; any skilled personnel without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (20)
1. direct type backlight module comprises at least:
One fluorescent tube has a upper surface;
One reflecting plate is arranged at the below of this fluorescent tube;
One diffuser plate is arranged at the top of this fluorescent tube, comprises a first area and a second area, and wherein this first area is corresponding to this upper surface of this fluorescent tube, and this second area is in abutting connection with this first area; And
One reflection horizon, local this upper surface that covers this fluorescent tube from the light that this upper surface penetrates, so that this light reflexes to this reflecting plate, reflexes to this second area via this reflecting plate with this light in order to shaded portions again.
2. direct type backlight module as claimed in claim 1, wherein this reflection horizon comprises a plurality of reflector elements.
3. direct type backlight module as claimed in claim 2, wherein this each reflector element Discrete Distribution is in this upper surface.
4. direct type backlight module as claimed in claim 2, wherein this each reflector element is spaced in this upper surface.
5. direct type backlight module as claimed in claim 1, wherein this reflection horizon is a metallic compound.
6. direct type backlight module as claimed in claim 1, wherein this reflection horizon is that vacuum plating is in this upper surface.
7. direct type backlight module as claimed in claim 6, wherein this reflection horizon is sputtered in this upper surface.
8. slimming straight-down negative lamp box comprises:
One reflecting plate is arranged at the inside bottom surface of this lamp box;
A plurality of fluorescent tubes, be set in parallel in the top of this reflecting plate, wherein this each fluorescent tube also comprises a reflection horizon, wherein this reflection horizon is a local upper surface that is covered in this each fluorescent tube, in order to the light of shaded portions from this upper surface ejaculation, so that this light reflexes to this reflecting plate, via this reflecting plate this light is reflexed in the space between this each fluorescent tube again.
9. lamp box as claimed in claim 8, wherein this reflection horizon comprises a plurality of reflector elements.
10. lamp box as claimed in claim 9, wherein this each reflector element Discrete Distribution is in this upper surface.
11. lamp box as claimed in claim 9, wherein this each reflector element is spaced in this upper surface.
12. lamp box as claimed in claim 8, wherein this reflection horizon is a metallic compound.
13. lamp box as claimed in claim 8, wherein this reflection horizon vacuum plating is in this upper surface.
14. lamp box as claimed in claim 13, wherein this reflection horizon is sputtered in this upper surface.
15. a fluorescent tube that is used in direct type backlight module, wherein this direct type backlight module comprises a reflecting plate, is arranged at the below of this fluorescent tube, and this fluorescent tube comprises:
One upper surface;
A plurality of reflector elements, dispersed arrangement also is attached to this upper surface, from the light that this upper surface penetrates, so that this light reflexes to this reflecting plate, via this reflecting plate this light is reflexed to the side space of this fluorescent tube again in order to shaded portions.
16. fluorescent tube as claimed in claim 15, wherein this reflector element is a circular configuration.
17. fluorescent tube as claimed in claim 15, wherein this reflector element is a list structure.
18. fluorescent tube as claimed in claim 15, wherein the material of this reflector element is a metallic compound.
19. fluorescent tube as claimed in claim 15, wherein this each reflector element vacuum plating is in this upper surface.
20. fluorescent tube as claimed in claim 15, wherein this each reflector element is sputtered in this upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031101690A CN100368893C (en) | 2003-04-15 | 2003-04-15 | Directly downward thin back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031101690A CN100368893C (en) | 2003-04-15 | 2003-04-15 | Directly downward thin back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1538216A CN1538216A (en) | 2004-10-20 |
| CN100368893C true CN100368893C (en) | 2008-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031101690A Expired - Fee Related CN100368893C (en) | 2003-04-15 | 2003-04-15 | Directly downward thin back light module |
Country Status (1)
| Country | Link |
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| CN (1) | CN100368893C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI264594B (en) | 2005-04-01 | 2006-10-21 | Lite On Technology Corp | Back light module |
| KR101212137B1 (en) | 2005-08-05 | 2012-12-14 | 엘지디스플레이 주식회사 | backlight unit |
| TW200732773A (en) | 2006-02-17 | 2007-09-01 | Au Optronics Corp | Reflective sheet of backlight module |
| CN100462812C (en) * | 2006-04-04 | 2009-02-18 | 友达光电股份有限公司 | Backlight module reflector plate |
| US20100253705A1 (en) * | 2007-09-13 | 2010-10-07 | Sharp Kabushiki Kaisha | Backlight device and display device |
| CN102628565B (en) * | 2012-03-26 | 2014-01-15 | 深圳市华星光电技术有限公司 | Direct type backlight module and liquid crystal display device |
| CN105372874A (en) * | 2015-11-14 | 2016-03-02 | 合肥骇虫信息科技有限公司 | Liquid crystal module set with uniformed brightness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6126297A (en) * | 1997-05-30 | 2000-10-03 | Ichikoh Industries, Ltd. | Planar color light emitting device |
| CN1316668A (en) * | 2000-03-24 | 2001-10-10 | 株式会社日立制作所 | Liquid crystal display device |
| CN1409161A (en) * | 2001-09-19 | 2003-04-09 | 惠和株式会社 | Reflective thin sheet and back light assembly using said sheet |
| WO2003032059A1 (en) * | 2001-10-08 | 2003-04-17 | L-3 Communications | Low profile backlight optimized for liquid crystal displays |
-
2003
- 2003-04-15 CN CNB031101690A patent/CN100368893C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6126297A (en) * | 1997-05-30 | 2000-10-03 | Ichikoh Industries, Ltd. | Planar color light emitting device |
| CN1316668A (en) * | 2000-03-24 | 2001-10-10 | 株式会社日立制作所 | Liquid crystal display device |
| CN1409161A (en) * | 2001-09-19 | 2003-04-09 | 惠和株式会社 | Reflective thin sheet and back light assembly using said sheet |
| WO2003032059A1 (en) * | 2001-10-08 | 2003-04-17 | L-3 Communications | Low profile backlight optimized for liquid crystal displays |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1538216A (en) | 2004-10-20 |
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Granted publication date: 20080213 Termination date: 20160415 |