CN100529879C - Straight down type back light module unit - Google Patents
Straight down type back light module unit Download PDFInfo
- Publication number
- CN100529879C CN100529879C CNB2005100371214A CN200510037121A CN100529879C CN 100529879 C CN100529879 C CN 100529879C CN B2005100371214 A CNB2005100371214 A CN B2005100371214A CN 200510037121 A CN200510037121 A CN 200510037121A CN 100529879 C CN100529879 C CN 100529879C
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- China
- Prior art keywords
- mode set
- down straight
- aphototropism mode
- straight aphototropism
- guide plate
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Abstract
The provided drop-off backlight module comprises: substrate, a light guide plate with one incidence surface and opposite emergence surface, some diodes on the substrate opposite to the incidence surface, a luminous chip on the substrate of diode, and a package structure to close the chip and form an emergence surface. This invention can improve the evenness of emergence light.
Description
[technical field]
The present invention relates to a kind of module backlight that is applied to field of liquid crystal display, relate in particular to a kind of down straight aphototropism mode set.
[background technology]
LCD is a kind of passive type display device, and it does not have the characteristics of luminescence, need provide module backlight to realize Presentation Function for it.Module backlight can be divided into two kinds of side-light type module backlight and down straight aphototropism mode set by structure.
Down straight aphototropism mode set needs higher brightness, and its outgoing light homogeneity will reach predetermined demand, thereby promotes the visual effect of color contrast, full frame regional luminance effect and the complete machine of the LCD that adopts this module backlight.
The light source of down straight aphototropism mode set can adopt light emitting diode, because light emitting diode has advantages such as operating voltage is low, luminosity is high, response speed is fast, the life-span is long.Compare with cold cathode fluorescent lamp, light emitting diode has more environmental protection, is beneficial to the characteristics that display area maximizes.Just, the bright dipping of light emitting diode has stronger directive property, makes module backlight be difficult for obtaining preferable outgoing light homogeneity.
Fig. 1 is the down straight aphototropism mode set structural representation that prior art adopts LED source, and this down straight aphototropism mode set 10 comprises: a substrate 11; One light guide plate 13, it comprises an incidence surface 131, an exiting surface 132 relative with incidence surface 131; A plurality of light emitting diodes 12, it is arranged on the aforesaid substrate 11 and faces the incidence surface 131 of light guide plate 13; At least one blooming piece 14, it is arranged on the exiting surface 132 of above-mentioned light guide plate 13.
Above-mentioned light emitting diode 12 comprises: a substrate 121, luminescence chip 122 are fixed in the substrate 121, and encapsulating structure 123 coats this luminescence chip 122 and forms an exit facet 120.The light that light emitting diode 12 sends incides on the incidence surface 131 of light guide plate 13, because configuration relation between the light guide plate 13 of the restriction of light emitting diode 12 self lighting angle (the light emitting diode dispersion angle is generally 120 degree) and light emitting diode 12 and module backlight, the incidence surface 131 of light guide plate 13 is stronger over against the regional glazed thread of light emitting diode 12, with light emitting diode 12 zone far away then light a little less than, so on the exiting surface 132 of light guide plate 13, will produce blanking bar 15, influence the brightness and the light-emitting uniformity of module 10 backlight.
In view of this, provide the higher down straight aphototropism mode set of a kind of outgoing light homogeneity real for necessary.
[summary of the invention]
Below, will the down straight aphototropism mode set that a kind of outgoing light homogeneity is higher be described with embodiment.
For realizing foregoing, the invention provides a kind of down straight aphototropism mode set.This down straight aphototropism mode set comprises: a substrate; One light guide plate, it has an incidence surface and an exiting surface relative with incidence surface; A plurality ofly be arranged on this substrate and the light emitting diode relative with the incidence surface of light guide plate, each light emitting diode comprises a substrate, one is arranged on this suprabasil luminescence chip, and one coat this luminescence chip and form the encapsulating structure of an exit facet, wherein, on the incidence surface of light guide plate and over against a plurality of light emitting diodes place, be provided with a plurality of microstructures respectively, and described exit facet is a concave surface, has a plurality of V-type groove structures on the described concave surface.
Further, when exit facet was near more apart from luminescence chip, the angle at this V-type groove structure tip was more little.
The down straight aphototropism mode set that the embodiment of the invention provided, on the incidence surface of its light guide plate and with exit facet that a plurality of light emitting diode opposite positions are respectively arranged with a plurality of microstructures and light emitting diode be a concave surface with a plurality of V-type groove structures, the light refraction that this concave surface can send light emitting diode is to the more weak zone of brightness, the light refraction that a plurality of V-type groove structures can be sent luminescence chip is to the less incidence surface of light, thereby effectively eliminate the blanking bar phenomenon of the down straight aphototropism mode set demonstration of adopting light emitting diode to make light source, improve the outgoing light homogeneity of module backlight, effectively weakened luminescence chip center light intensity.
[description of drawings]
Fig. 1 is the down straight aphototropism mode set structural representation of prior art.
Fig. 2 is an embodiment of the invention down straight aphototropism mode set structural representation.
Fig. 3 is the enlarged drawing of the light emitting diode shown in the III part among Fig. 2.
Fig. 4 is an embodiment of the invention down straight aphototropism mode set light path synoptic diagram.
[embodiment]
Please be simultaneously with reference to Fig. 2, Fig. 3 and Fig. 4, wherein Fig. 2 is the structural representation of present embodiment down straight aphototropism mode set 20, and shown in Figure 3 is the light-emitting diode structure synoptic diagram of present embodiment, and Fig. 4 is the index path of present embodiment down straight aphototropism mode set 20.This down straight aphototropism mode set 20 comprises: a substrate 21; One light guide plate 23, it has an incidence surface 231 and an exiting surface 232 relative with incidence surface 231; A plurality of light emitting diodes 22 that are arranged on this substrate 21, it is in order to emit beam as light source and incidence surface 231 settings of light guide plate 23 relatively, be respectively arranged with a plurality of sites group 26 on the incidence surface 231 of light guide plate 23 and with a plurality of light emitting diode 22 opposite positions, aforesaid substrate 21 can be a printed circuit board.Above-mentioned site group 26 can be various microstructures, and the xsect of microstructure can be arbitrary shape, for example: V-type, semi-circular, the square type, ladder type etc., in the present embodiment, the xsect of site is semi-circular in the group 26 of described site.Between each site group 26 certain intervals is arranged, and the microstructure in any site group 26 is a continuous distribution.
Because light emitting diode 22 self lighting angle is restricted, simultaneously its light major part of sending concentrate on luminescence chip 222 over against the zone on, so, the incidence surface 231 of light guide plate 23 is stronger over against the regional glazed thread of light emitting diode 22, with light emitting diode 12 zone far away then light a little less than.Being provided with of above-mentioned a plurality of sites group 26 can be carried out effective scattering in the time of on being mapped to light guide plate 23 incidence surfaces 231 effectively with the light that is penetrated by light emitting diode 22, and the uniformity coefficient on the exiting surface 232 is enhanced.
Above-mentioned light guide plate 23 can select for use acryl resin, epoxy resin, polyurethane, transparent heat hardening resin or uv-hardening resin one of them.
As shown in Figure 3, light emitting diode 22 comprises: a substrate 221; One luminescence chip 222, it is arranged in this substrate 221; One encapsulating structure 223, it coats this luminescence chip 222 and forms an exit facet 220.The exit facet 220 of light emitting diode 22 is a curved surface to luminescence chip 222 depressions, a plurality of V-type groove structures 2231 are set on this exit facet 220, its distribution is a foundation with the distance of exit facet 220 and luminescence chip 222, and the angle near these V-type groove structure 2231 tips, these luminescence chip 222 places is more little more when distance.Control the light that luminescence chip 222 produced by the angle that changes V-type groove structure 2231 and enter the incident angle of light guide plate 23, especially, light guide plate 23 and the more little place of luminescence chip 222 distances, just cause light than the strength, need to strengthen light refraction, so the angle of V-type groove structure is more little.The angle of the V-type groove structure in the present embodiment is within the scope of 60 degree～150 degree.
The material of above-mentioned encapsulating structure 223 is a resin, its can select for use vibrin, acryl resin, fluoride resin or vestolit one of them.
As shown in Figure 4, the light that luminescence chip 222 sends is mapped to earlier on the exit facet 220, the V-type groove structure 2231 that is arranged on the exit facet 220 can be with divergence of beam, be that 2231 pairs of light that are mapped on the exit facet 220 of V-type groove structure have stronger disperse function, light all is the incidence surface 231 of edge away from the direction directive light guide plate 23 of luminescence chip 222 after 2231 refractions of V-type groove structure basically, thereby has weakened luminescence chip 222 center light intensity.Light via exit facet 220 scatterings after, project on the incidence surface 231 of light guide plate 23, light is via the further scattering of site group 26, be that light reflects at site group 26 places, refractive direction is the direction away from luminescence chip 222, thereby further weaken luminescence chip 222 center light intensity, light is finally penetrated by the exiting surface 232 of light guide plate 23.Effectively improved by the above-mentioned outgoing light homogeneity that the exiting surface 232 of light guide plate 23 is set, improved light utilization efficiency simultaneously.
Be located at the blooming piece 24 on the exiting surface 232 of light guide plate 23, can produce required diffusion, light enhancing effect.
In addition, those skilled in the art also can do other variation in spirit of the present invention.So the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (8)
1. down straight aphototropism mode set, it comprises: a substrate; One light guide plate, it has an incidence surface and an exiting surface relative with incidence surface; A plurality ofly be arranged on this substrate and the light emitting diode relative with the incidence surface of light guide plate, it comprises a substrate, one is arranged on this suprabasil luminescence chip, and one coat this luminescence chip and form the encapsulating structure of an exit facet, on the incidence surface of light guide plate and over against a plurality of light emitting diodes place, be provided with a plurality of microstructures respectively, it is characterized in that described exit facet is a concave surface, have a plurality of V-type groove structures on the described concave surface.
2. down straight aphototropism mode set as claimed in claim 1, the cross sectional shape that it is characterized in that site in the group of described site is semi-circular.
3. down straight aphototropism mode set as claimed in claim 1, it is characterized in that described encapsulating structure material therefor be selected from vibrin, acryl resin, fluoride resin or vestolit one of them.
4. down straight aphototropism mode set as claimed in claim 1 is characterized in that when exit facet was near more apart from luminescence chip, the angle at described V-type groove structure tip was more little.
5. down straight aphototropism mode set as claimed in claim 1, the angle that it is characterized in that described V-type groove structure is in the scope of 60 degree～150 degree.
6. down straight aphototropism mode set as claimed in claim 1 is characterized in that described concave surface is a cambered surface.
7. down straight aphototropism mode set as claimed in claim 1 is characterized in that the exiting surface of described light guide plate is provided with at least one blooming piece.
8. down straight aphototropism mode set as claimed in claim 1, it is characterized in that described light guide plate be selected from acryl resin, epoxy resin, polyurethane, transparent heat hardening resin or uv-hardening resin one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100371214A CN100529879C (en) | 2005-09-07 | 2005-09-07 | Straight down type back light module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100371214A CN100529879C (en) | 2005-09-07 | 2005-09-07 | Straight down type back light module unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1928651A CN1928651A (en) | 2007-03-14 |
| CN100529879C true CN100529879C (en) | 2009-08-19 |
Family
ID=37858682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100371214A Expired - Fee Related CN100529879C (en) | 2005-09-07 | 2005-09-07 | Straight down type back light module unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100529879C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200947057A (en) | 2008-05-06 | 2009-11-16 | Advanced Optoelectronic Tech | Light module for LCD backlight module |
| US8057056B2 (en) * | 2008-08-09 | 2011-11-15 | Tsinghua University | Light guide plates and backlight module |
| CN102299232A (en) * | 2010-06-24 | 2011-12-28 | 鸿富锦精密工业（深圳）有限公司 | LED (light emitting diode) and light source module |
| CN102954391A (en) * | 2011-08-19 | 2013-03-06 | 冠捷投资有限公司 | Backlight module |
| CN103454718A (en) * | 2013-09-27 | 2013-12-18 | 上海向隆电子科技有限公司 | Light guide plate |
| CN103499068B (en) * | 2013-09-30 | 2016-03-09 | 京东方科技集团股份有限公司 | A kind of backlight, spliced backlight and display unit |
| CN107065061B (en) * | 2017-04-27 | 2020-02-14 | 武汉华星光电技术有限公司 | Light guide plate and direct type backlight assembly |
| CN107369676B (en) * | 2017-08-02 | 2019-12-10 | 厦门市三安光电科技有限公司 | ultraviolet LED module structure |
| CN108267809A (en) * | 2018-02-12 | 2018-07-10 | 京东方科技集团股份有限公司 | Light guide plate, backlight and display device |
| CN108732816B (en) * | 2018-05-22 | 2021-06-25 | 武汉华星光电技术有限公司 | Area source backlight module and liquid crystal display panel |
| CN113176686A (en) * | 2021-04-21 | 2021-07-27 | Tcl华星光电技术有限公司 | Backlight module and display device |
| TWI808652B (en) * | 2021-12-27 | 2023-07-11 | 瑞儀光電股份有限公司 | Backlight module and display |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2391269Y (en) * | 1999-09-30 | 2000-08-09 | 曹新民 | Back light source for liquid crystal display (LCD) lighting |
| CN2596387Y (en) * | 2003-01-09 | 2003-12-31 | 山太士股份有限公司 | Light guide plate structure |
| JP2005063913A (en) * | 2003-08-20 | 2005-03-10 | Toyota Industries Corp | Light guide plate |
-
2005
- 2005-09-07 CN CNB2005100371214A patent/CN100529879C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2391269Y (en) * | 1999-09-30 | 2000-08-09 | 曹新民 | Back light source for liquid crystal display (LCD) lighting |
| CN2596387Y (en) * | 2003-01-09 | 2003-12-31 | 山太士股份有限公司 | Light guide plate structure |
| JP2005063913A (en) * | 2003-08-20 | 2005-03-10 | Toyota Industries Corp | Light guide plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1928651A (en) | 2007-03-14 |
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Granted publication date: 20090819 Termination date: 20170907 |