CN100376957C - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN100376957C CN100376957C CNB2004100153802A CN200410015380A CN100376957C CN 100376957 C CN100376957 C CN 100376957C CN B2004100153802 A CNB2004100153802 A CN B2004100153802A CN 200410015380 A CN200410015380 A CN 200410015380A CN 100376957 C CN100376957 C CN 100376957C
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- Prior art keywords
- incidence
- guide plate
- groove
- light guide
- plane
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- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a back light module. The present invention comprises a light guide plate and at least one point light source, wherein the light guide plate comprises an incident surface and an emergent surface which is connected with the incident surface, the point light source is opposite to the incident surface, and the emergent surface is provided with a plurality of polygonal groove structure units which are arranged in lines.
Description
[technical field]
The invention relates to a kind of module backlight, particularly about a kind of backlight liquid crystal display module that is applied to.
[background technology]
LCD is a kind of non-self-emission display apparatus, it shows mainly passing through or the obstructed realization of coming by control light beam that external light source sends, therefore need corresponding backlight module or preceding optical mode group, this backlight or preceding optical mode group can realize Presentation Function with the beam direction display panel that external light source sent.At present, along with the growth day by day of large scale liquid crystal display backlight or preceding optical mode group demand, more and more higher to the requirement of the outgoing light homogeneity of LCD backlight or preceding optical mode group.
Seeing also Fig. 1, is a kind of module backlight 1 of prior art, and this module 1 backlight comprises a plurality of pointolites 11, a reflecting plate 12, a light guide plate 13, a diffuser plate 14 and a blast sheet 15.This light guide plate 13 roughly is plate shaped, and it comprises a plane of incidence 131, a bottom surface 133 and an exit facet 132.Wherein this pointolite 11 is provided with respect to the plane of incidence 131 of light guide plate 13, and this reflecting plate 12, light guide plate 13, diffuser plate 14 and blast sheet 15 stack gradually placement.The light beam that sends by pointolite 11, this blast sheet 15 of guiding after light guide plate 13, reflecting plate 12 and diffuser plate 14 transmission, these blast sheet 15 surfaces are evenly distributed with a plurality of parallel prism structures 151, and this prism structure 151 is assembled this light beam and directed toward display panel (figure does not show).
Seeing also Fig. 2, is the energy distribution synoptic diagram of the emergent light of two pointolites 11 at light guide plate 13 space planes 200.Because the emergent light energy of pointolite 11 is circular cone distribution (seeing also Fig. 3), so, when the emergent light of this pointolite 11 is incident to space plane 200, the zone 261,262 and 263 that this space plane 200 can exist emergent light to arrive, this zone 261,262 and 263 is commonly called the blanking bar district, influences the outgoing light homogeneity of module backlight.
[summary of the invention]
In order to overcome the relatively poor problem of module outgoing light homogeneity backlight in the prior art, the invention provides the higher module backlight of a kind of outgoing light homogeneity.
The technical scheme that technical solution problem of the present invention is adopted is: module backlight of the present invention comprises a light guide plate and at least one pointolite, this light guide plate comprises at least one plane of incidence, an exit facet that links to each other with the plane of incidence, this at least one plane of incidence setting relatively of this pointolite, wherein, this exit facet has a plurality of polygon groove structure unit that ranks are arranged that are, this a plurality of polygon groove structures unit comprises a plurality of grooves respectively, and comprises perpendicular to the groove of the light guide plate plane of incidence and the groove that is parallel to the light guide plate plane of incidence to the described polygon groove structure of small part unit.
Compared to prior art, because the light guide plate exit facet of module backlight has a plurality of polygon groove structure unit that ranks are arranged that are among the present invention, the light guide plate zone of this structure energy dispersed light beam comparatively dense is the more sparse light guide plate zone of convection light simultaneously, thereby reduce the gap between the module light and shade backlight zone, and then the module backlight that weakens prior art has the defective of blanking bar, improve the relatively poor problem of outgoing light homogeneity of module backlight, improve the outgoing light homogeneity of module backlight.
[description of drawings]
Fig. 1 is the module three-dimensional exploded view backlight of prior art.
Fig. 2 is the module light path synoptic diagram backlight of prior art.
Fig. 3 is the light emitting diode light intensity polar coordinates distribution plan of prior art.
Fig. 4 is the floor map of the present invention's module first embodiment backlight.
Fig. 5 is the floor map of the present invention's module second embodiment backlight.
[embodiment]
Seeing also Fig. 4, is first embodiment of the present invention's module backlight.This module 100 backlight comprises two pointolites 10 and a light guide plate 20.This pointolite 10 is to be used to send light beam, and the transmission direction that these light guide plate 20 these light emitting diodes 10 of guiding send light beam is converted into the area source outgoing.
This light guide plate 20 is plate shaped light guide plate, is to adopt transparent materials such as acryl, glass or polycarbonate to make, and it comprises a light entrance face 201, an exit facet that links to each other with the plane of incidence 201 202 and and exit facet 202 opposed bottom surface (figure does not show).This plane of incidence 201 is to be used for the light beam that acceptance point light source 10 sends.This exit facet 202 comprises the hexagonal structure unit 2020 that the capable m row of a plurality of n of being are arranged, and the size of this each hexagonal structure unit 2020 is corresponding with each pixel cell of liquid crystal panel (figure does not show).This hexagon is divided into three area I, II and III, these three zones have the groove of different directions, ((j≤m) classifies example as for the row of i≤n), the 1st row and j with the 1st row, i, the arrangement mode of the 1st row is: II zone groove direction is constant perpendicular to the plane of incidence 201 directions of light guide plate 20 and its arrangement mode and groove density degree, the groove direction in I and III zone favours the plane of incidence 201 directions and its groove density does not wait, wherein less from this nearer zone groove density of light source, this zone groove density far away from light source is bigger; The arrangement mode that i is capable is: II zone groove arrangement mode difference, be divided into two partly, and wherein a part is perpendicular to the plane of incidence 201 directions of light guide plate 20, and another partly is parallel to the plane of incidence 201 directions; The groove in I and III zone and the plane of incidence 201 direction pitch angle are less than the respective regions groove of the 1st row and the pitch angle of the plane of incidence 201 directions, and are promptly bigger from the nearer pitch angle of light source, less from the pitch angle that light source is far away.The arrangement mode of the 1st row is: be as the criterion with range points light source distance, walking to from the 1st that the groove in the capable n of n hexagonal structure unit 2020, the I and III zone and the plane of incidence 201 direction pitch angle diminish gradually is 0 °; II zone groove arrangement mode difference, be divided into two partly, wherein a part is perpendicular to the plane of incidence 201 directions of light guide plate 20, and another partly is parallel to the plane of incidence 201 directions, and its ratio is: near more big more perpendicular to the shared ratio of the groove on the plane of incidence 201 directions from light source.J row arrangement mode is: its II zone groove arrangement mode and I and III zone groove are identical with the 1st row with the plane of incidence 201 direction pitch angle, and still, its I and III zone groove density are less than II zone groove density.
The bottom surface of light guide plate 20 is provided with a plurality of sites (figure does not show), to improve the homogeneity of light guide plate 20 outgoing beams.The size of this site is to increase progressively along the direction away from the plane of incidence 201, and it is a spherical shape.This site also can be cylindric, square, pyramid or other suitable shape.This site can be printed or mode such as ejection formation is distributed in the bottom surface of light guide plate 20.In addition, a plurality of V-shaped grooves (figure does not show) also can be set to substitute these a plurality of sites in the bottom surface.
Owing to have and the corresponding hexagonal structure of each pixel cell of liquid crystal panel unit 2020 on 202 of the exit facets of light guide plate 20, groove on this hexagonal structure unit 2020 is different and have different angles of inclination along with its distance with pointolite 10, make from light source zone far away convection light greatly, thereby improve the outgoing light homogeneity of light guide plate 20.
Seeing also Fig. 5, is second embodiment of the present invention's module backlight.This module 200 backlight comprises two pointolites 30 and a light guide plate 40, exit facet 402 and and exit facet 402 opposed bottom surface (figure does not show) that this light guide plate 40 comprises a light entrance face 401, links to each other with the plane of incidence 401.This plane of incidence 401 is to be used for the light beam that acceptance point light source 30 sends.This exit facet 402 comprises the quadrilateral structure unit 4020 that the capable m row of a plurality of n of being are arranged.Capable and j classifies example as with i, and i is capable, and arrangement mode is: groove direction is perpendicular to the plane of incidence 401 directions of light guide plate 40, and wherein less from this nearer zone groove density of light source, this zone groove density far away from light source is bigger; J row arrangement mode is: this zone groove arrangement mode is divided into two partly, wherein a part is perpendicular to the plane of incidence 401, another partly is parallel to the plane of incidence 401 directions, and its ratio is: near more big more perpendicular to the shared ratio of the groove on the plane of incidence 401 directions from light source.
It is to utilize electron beam direct to write that (E1ectron Beam Direct Write, etching mode EBDW) is write on the die, forms light guide plate by thermoforming way that structural unit on light guide plate 40 exit facets 202 and 402 of the present invention's module backlight is arranged.
Module backlight of the present invention can have other change design, and for example a plurality of quadrilateral structures unit 4020 shapes of this light guide plate 40 are not only quadrilateral, also can be that pentagon or other are polygon-shaped.Also can be on these light guide plate 40 planes of incidence, by method plating one deck anti-reflection film or anti-reflective films such as electron beam evaporation plating or chemical vapour deposition techniques, realize colorize for making incident light, can be at plane of incidence plating one deck fluorescence coating, the bottom surface also can be provided with vaporific flower or the texture of picking to substitute these a plurality of sites, this light guide plate shape is not limited to plate shaped, also can be wedge shape.
Claims (9)
1. module backlight, comprise a light guide plate and at least one pointolite, this light guide plate comprises at least one plane of incidence, an exit facet that links to each other with the plane of incidence, this plane of incidence setting relatively of this pointolite, it is characterized in that: this exit facet has a plurality of polygon groove structure unit that ranks are arranged that are, this a plurality of polygon groove structures unit comprises a plurality of grooves respectively, and comprises perpendicular to the groove of the light guide plate plane of incidence and the groove that is parallel to the light guide plate plane of incidence to the described polygon groove structure of small part unit.
2. module backlight as claimed in claim 1 is characterized in that: this a plurality of polygon groove structures unit is the hexagonal structure unit.
3. module backlight as claimed in claim 2 is characterized in that: each the hexagonal structure unit in this a plurality of hexagonal structures unit is divided into three area I, II and III, and these three zones have the groove of different directions according to the distance between itself and the light source.
4. module backlight as claimed in claim 3, it is characterized in that: this II zone groove direction is perpendicular to the light guide plate plane of incidence and constant with the arrangement mode of delegation, the groove direction in I and III zone favours the light guide plate plane of incidence and its groove density does not wait, wherein less from this nearer zone groove density of light source, this zone groove density far away from light source is bigger.
5. module backlight as claimed in claim 3, it is characterized in that: this II zone groove is divided into two partly, wherein a part is perpendicular to the light guide plate plane of incidence, and another partly is parallel to the light guide plate plane of incidence, and its ratio is: near more big more perpendicular to the shared ratio of the groove on the light guide plate from light source.
6. module backlight as claimed in claim 3 is characterized in that: does not wait at the groove and the light guide plate plane of incidence pitch angle in this I and III zone, bigger from the pitch angle that light source is nearer, less from the pitch angle that light source is far away.
7. module backlight as claimed in claim 1 is characterized in that: this plane of incidence is provided with fluorescent layer.
8. module backlight as claimed in claim 1 is characterized in that: this plane of incidence is coated with anti-reflection film.
9. module backlight as claimed in claim 1 is characterized in that: this light guide plate is plate shaped or wedge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100153802A CN100376957C (en) | 2004-02-14 | 2004-02-14 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100153802A CN100376957C (en) | 2004-02-14 | 2004-02-14 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1655028A CN1655028A (en) | 2005-08-17 |
| CN100376957C true CN100376957C (en) | 2008-03-26 |
Family
ID=34892167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100153802A Expired - Fee Related CN100376957C (en) | 2004-02-14 | 2004-02-14 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100376957C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8822931B2 (en) * | 2010-11-23 | 2014-09-02 | Koninklijke Philips N.V. | PET detector modules utilizing overlapped light guides |
Citations (2)
| 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 |
| CN2586982Y (en) * | 2002-12-03 | 2003-11-19 | 鸿富锦精密工业（深圳）有限公司 | Back light system |
-
2004
- 2004-02-14 CN CNB2004100153802A patent/CN100376957C/en not_active Expired - Fee Related
Patent Citations (2)
| 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 |
| CN2586982Y (en) * | 2002-12-03 | 2003-11-19 | 鸿富锦精密工业（深圳）有限公司 | Back light system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1655028A (en) | 2005-08-17 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20180214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |