CN100462802C - Backlight module and light guiding plate thereof - Google Patents
Backlight module and light guiding plate thereof Download PDFInfo
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- CN100462802C CN100462802C CNB2005101003648A CN200510100364A CN100462802C CN 100462802 C CN100462802 C CN 100462802C CN B2005101003648 A CNB2005101003648 A CN B2005101003648A CN 200510100364 A CN200510100364 A CN 200510100364A CN 100462802 C CN100462802 C CN 100462802C
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- guide plate
- light guide
- light
- type
- exiting surface
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Abstract
The invention relates to light guiding board and back light die set. The light guiding board includes one light exiting face, one back face, many light entering faces. The geometric centre of the back face is inner depressed towards the light guiding board; its base line forms one cone-shaped body with the geometric center to generate many inclined planes each which respectively forms many V type crowning which is parallel with the back face, has the same shape; and the longer its distance from the back face, the bigger its density and size are. The invention also supplies back light die set which has the advantages of high emitted light brightness uniformity.
Description
[technical field]
The present invention relates to a kind of module backlight and its light guide plate, relate in particular to a kind of module backlight and its light guide plate that adopts side-mounted illumination.
[background technology]
Because the liquid crystal of panel of LCD itself is not had a characteristics of luminescence, thereby, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as module backlight, its role is to area source abundant to panel of LCD supply brightness and that be evenly distributed.
The module side-mounted backlight of prior art mainly is made up of light source, light guide plate, reflecting plate, diffuser plate and prism plate.This light source can be arranged at least one side of light guide plate and with light emission to this light guide plate.The effect of this light guide plate is the transmission direction of direct light line, make light by the even outgoing of the exiting surface of light guide plate, the reflecting plate bottom surface of this light guide plate relatively is provided with, and being reflected into once more by the light of bottom surface of light guide plate outgoing in this light guide plate, improves the utilization factor of light.Diffuser plate sets gradually with the exiting surface of the relative light guide plate of prism plate, so that more even by the distribution of light of light guide plate outgoing, and then the brightness and the homogeneity of raising panel of LCD.
But, adopt the LCD of side-mounted module backlight, because its brightness is less, therefore generally only be used widely, as fields such as mobile phones in undersized LCD.And general large-sized LCD has the demand that develops in light weight and the high direction of brightness, as notebook computer, and fields such as LCD TV.
See also Fig. 1, in order to make side-mounted module backlight reach in light weight and the high effect of brightness, prior art provides a kind of module backlight 10, it comprises four cathode fluorescent tubes (Cold CathodeFluorescent Lamp, CCFL) 11 and one light guide plate 12, this light guide plate 12 comprises an exiting surface 122, one and these exiting surface 122 opposed bottom surface 124 and four incidence surfaces 121 that are connected this exiting surface 122 and this bottom surface 124.The geometric center of this bottom surface 124 is to these light guide plate 12 sunken insides, make the thickness of this light guide plate 12 by the edge to the attenuation gradually of this geometric center.Four bases of this geometric center and this bottom surface 124 form a four sides cone-shaped body, make this bottom surface 124 form four inclined-planes.These four inclined-planes are respectively towards this four incidence surface 121.These four CCFL11 are respectively near these four incidence surfaces 121 and to its irradiation light.
But this light guide plate 12 is because the bottom surface is a concave inward structure, and it will influence the emergent light homogeneity of exiting surface.And adopt four CCFL11 to have following shortcoming to the design of four incidence surface 121 irradiation light: the relative center section of two ends luminosity of this CCFL11 is low to cause 12 4 corners of this light guide plate to form the dark space easily.
In view of this, provide a kind of and have higher emergent light homogeneity, and light guide plate in light weight, that brightness is high and module backlight real be necessity.
[summary of the invention]
To illustrate a kind ofly have higher emergent light homogeneity with embodiment below, and light guide plate in light weight, that brightness is high, and a kind of module backlight that adopts this light guide plate.
A kind of light guide plate, it comprises an exiting surface, one with this exiting surface opposed bottom surface, and a plurality of incidence surfaces that connect this exiting surface and this bottom surface, the geometric center of this bottom surface is to this light guide plate sunken inside, and a plurality of bases of this geometric center and this bottom surface form a cone-shaped body, make this bottom surface form a plurality of inclined-planes, wherein each inclined-plane forms a plurality of V-type projectioies that are parallel to respective bottom edges respectively, this V-type projection is of similar shape, and far away more apart from the base, V-type bump array density is close more, and size is big more.
A kind of module backlight, it comprises a plurality of light sources and a light guide plate, this light guide plate comprises an exiting surface, one with this exiting surface opposed bottom surface, and a plurality of incidence surfaces that connect this exiting surface and this bottom surface, these a plurality of light sources are respectively near these a plurality of incidence surfaces, the geometric center of this bottom surface is to this light guide plate sunken inside, and a plurality of bases of this geometric center and this bottom surface form a cone-shaped body, make this bottom surface form a plurality of inclined-planes, and wherein each inclined-plane forms a plurality of V-type projectioies that are parallel to respective bottom edges respectively, this V-type projection is of similar shape, and far away more apart from the base, V-type bump array density is close more, and size is big more.
Compared with prior art, described light guide plate has the following advantages: adopt from the base on this inclined-plane to begin to form by dredging to close to this geometric center direction, the design of ascending a plurality of V-type projectioies, can play reinforcement geometric center and peripheral part thereof compression to the light beam shooting angle, thereby effectively improve the emitting brightness homogeneity of whole light guide plate, and adopt the module backlight of this light guide plate also to have the high advantage of emitting brightness homogeneity.
[description of drawings]
Fig. 1 is the side-mounted back light module unit structure synoptic diagram of prior art.
Fig. 2 is the module perspective view backlight of preferred embodiment one of the present invention.
Fig. 3 is the schematic cross-section of Fig. 2 along the III-III line.
Fig. 4 is the enlarged diagram of Fig. 3 local I V.
Fig. 5 is the module schematic top plan view backlight of preferred embodiment two of the present invention.
Fig. 6 is the schematic cross-section of Fig. 5 along the VI-VI line.
[embodiment]
To light guide plate of the present invention, adopt the module backlight of this light guide plate to be described in further detail below in conjunction with accompanying drawing and a plurality of embodiment.
See also Fig. 2 and Fig. 3, preferred embodiment one of the present invention provides a kind of module backlight 20.This module 20 backlight comprises four line sources 21 and a light guide plate 22, and this light guide plate 22 comprises: an exiting surface 222, one and these exiting surface 222 opposed bottom surface 224 and four incidence surfaces 221 that are connected this exiting surface 222 and this bottom surface 224.These four line sources 21 are irradiated into light near these four incidence surfaces 221 and to it respectively.
The geometric center of this bottom surface 224 is to these light guide plate 22 sunken insides, make the thickness of this light guide plate 22 by the edge to the attenuation gradually of this geometric center.Four bases of this geometric center and this bottom surface 224 form a rectangular pyramid body, make this bottom surface 224 form four inclined-planes.These four inclined-planes are respectively towards these four incidence surfaces 221, and each inclined-plane is in an acute angle with corresponding incidence surface 221.
A plurality of inclined-planes of this bottom surface 224 form a plurality of V-type projectioies 228 that are parallel to respective bottom edges respectively.The V-type projection 228 on each inclined-plane is of similar shape, and far away more apart from the base, and the arranging density of V-type projection 228 is close more, and size is big more.These a plurality of V-type projectioies 228 are the rectangular projection of V-type that varies in size.Each V-type projection 228 is highly consistent along its length.
See also Fig. 3 and Fig. 4, this light guide plate 22 is carried out section along the III-III line perpendicular to incidence surface 221.Because of these a plurality of V-type projectioies 228 are of similar shape, so the cross section of its each V-type projection 228 has the first base angle θ 1, the second base angle θ 2 and the vertex angle theta 3 of identical contiguous respective bottom edges.The span of this first base angle θ 1 is 5～60 degree.The span of the spacing of adjacent V-type projection 228 is 0.001～3.0 millimeter.The span of the height of this V-type projection 228 is 0.001～1.0 millimeter.
Because relative four incidence surfaces 221 of geometric center of this bottom surface 224 are far away, make the emitting brightness of exiting surface 222 relevant positions of this light guide plate 22 little near the position of corresponding incidence surface 221.Begin to form by dredging and adopt to close to this geometric center direction from the base on this inclined-plane, ascending a plurality of V-type projectioies 228, can play reinforcement geometric center and peripheral part thereof compression, thereby effectively improve the emitting brightness homogeneity of whole light guide plate the light beam shooting angle.In addition,, can realize control, make most of light beam edge perpendicular to exiting surface 222 direction outgoing to the outgoing beam angle of light guide plate by to the first base angle θ 1, the second base angle θ 2 of V-structure 228 and the suitable selection of vertex angle theta 3.
The light guide plate 22 of present embodiment can select lightweight transparent resin material to make, as acryl resin, polycarbonate, polyvinyl resin etc.The line source 21 of this enforcement can be selected cathode fluorescent tube for use.
This exiting surface 222 is a discharge cloudy surface.The fogging degree of four corners of this exiting surface is bigger than the fogging degree of its adjacent position, and the relative center section of two ends luminosity that is used to solve this line source 21 is low to cause 22 4 corners of this light guide plate to form the problem of dark space easily.
Be understandable that light guide plate of the present invention also can be pentagon, hexagon or other shapes, and corresponding formation five limits, its bottom surface, hexagon or other polygon cone-shaped bodys, each inclined-plane of this bottom surface is respectively towards a plurality of incidence surfaces of this light guide plate.Accordingly, module backlight of the present invention comprises that also a plurality of incidence surfaces of a plurality of light sources and light guide plate match.
See also Fig. 5 and Fig. 6, preferred embodiment two of the present invention provides a kind of module backlight 40.This module 40 backlight is similar to the module backlight 20 of preferred embodiment one, and its difference is to increase a reflection shield 44.This module 40 backlight comprises four line sources 41 and a light guide plate 42.This light guide plate 42 comprises 422, four incidence surfaces of an exiting surface, 421, one bottom surfaces 424 and a plurality of V-type projection 428.
This reflection shield 44 is one to surround the frame structure of this light guide plate 42 and these a plurality of line sources 41.This reflection shield 44 forms a rectangular recess 441 respectively towards four inboards of the incidence surface 421 of this light guide plate 42, is used to hold this four line sources 41.Wherein, the side up and down 442,443 of this rectangular recess 441 can be clamped this light guide plate 42.This reflection shield 44 is an integral structure.
Because this reflection shield 44 is the integral type frame structure,, can provide better protection to these four line sources 41 and this light guide plate 42 so have preferable physical strength.This reflection shield 44 is made for the metal material with good reflection light ability, as copper or aluminium etc.In addition, this reflection shield 44 also can form a total reflection film in its inboard towards this light guide plate incidence surface, is used for further improving the efficiency of light energy utilization.
Be understandable that line source of the present invention also can adopt L type cathode fluorescent tube except adopting the linear pattern cathode fluorescent tube, also can adopt a plurality of light emitting diode pointolites.In addition, the cross section of reflection shield of the present invention also can be the mount structure of semicircle curved surface.
LGP of the present invention has the following advantages: adopt from the base on this inclined-plane to begin to this geometric center Direction forms by dredging to close, and the design of ascending a plurality of V-type projections can be played the reinforcement geometric center And peripheral part is to the compression of light beam shooting angle, thus the bright dipping of the whole LGP of Effective Raise Brightness uniformity. And this exiting surface is that the fogging degree of discharge cloudy surface and its four corner is more adjacent than it The fogging degree of position is big, can solve low the causing of the relative mid portion of two ends luminosity by this line source The problem that four corners of this LGP form the dark space easily further improves the emitting brightness uniformity. In addition, Adopt the reflection shield of integral type to have better mechanical strength, can provide these a plurality of line sources and LGP Better protection. So backlight module of the present invention has the high and mechanical strength height of emitting brightness uniformity Advantage.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, these are complied with Variation according to spirit of the present invention is done all should be included in the present invention's scope required for protection.
Claims (11)
1. light guide plate, it comprises:
One exiting surface;
One with this exiting surface opposed bottom surface; With
The a plurality of incidence surfaces that connect this exiting surface and this bottom surface, the geometric center of this bottom surface is to this light guide plate sunken inside, and a plurality of bases of this geometric center and this bottom surface form a cone-shaped body, make this bottom surface form a plurality of inclined-planes, it is characterized in that each inclined-plane forms a plurality of V-type projectioies that are parallel to respective bottom edges respectively, this V-type projection is of similar shape, and far away more apart from the base, V-type bump array density is close more, and size is big more.
2. light guide plate as claimed in claim 1 is characterized in that this exiting surface is a discharge cloudy surface.
3. light guide plate as claimed in claim 2 is characterized in that the fogging degree of four corners of this exiting surface is bigger than the fogging degree of its adjacent position.
4. light guide plate as claimed in claim 1, the span that it is characterized in that the spacing of adjacent V-type projection is 0.001～3.0 millimeter.
5. light guide plate as claimed in claim 1, the span that it is characterized in that the height of this V-type projection is 0.001～1.0 millimeter.
6. light guide plate as claimed in claim 1 is characterized in that this light guide plate made by transparent resin material.
7. light guide plate as claimed in claim 6 is characterized in that this transparent resin material comprises acryl resin, polycarbonate, polyvinyl resin.
8. module backlight, it comprises:
A plurality of light sources;
One light guide plate, this light guide plate comprises:
One exiting surface,
One with this exiting surface opposed bottom surface and
The a plurality of incidence surfaces that connect this exiting surface and this bottom surface, these a plurality of light sources are respectively near these a plurality of incidence surfaces, the geometric center of this bottom surface is to this light guide plate sunken inside, and a plurality of bases of this geometric center and this bottom surface form a cone-shaped body, make this bottom surface form a plurality of inclined-planes, it is characterized in that each inclined-plane forms a plurality of V-type projectioies that are parallel to respective bottom edges respectively, this V-type projection is of similar shape, and far away more apart from the base, V-type bump array density is close more, and size is big more.
9. module backlight as claimed in claim 8 is characterized in that this line source comprises the linear pattern cathode fluorescent tube, L type cathode fluorescent tube and light emitting diode.
10. module backlight as claimed in claim 8 is characterized in that this module backlight further comprises a reflection shield, and this reflection shield is one to surround the frame shape structure of this light guide plate and these a plurality of line sources, and its inboard towards the incidence surface of this light guide plate forms a groove.
11. module backlight as claimed in claim 10 is characterized in that this reflection shield comprises that further one is formed at the total reflection film of this groove inboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101003648A CN100462802C (en) | 2005-10-14 | 2005-10-14 | Backlight module and light guiding plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101003648A CN100462802C (en) | 2005-10-14 | 2005-10-14 | Backlight module and light guiding plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1949048A CN1949048A (en) | 2007-04-18 |
| CN100462802C true CN100462802C (en) | 2009-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101003648A Expired - Fee Related CN100462802C (en) | 2005-10-14 | 2005-10-14 | Backlight module and light guiding plate thereof |
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| Country | Link |
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| CN (1) | CN100462802C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295040B (en) * | 2007-04-27 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN101963306A (en) * | 2009-07-24 | 2011-02-02 | 康佳集团股份有限公司 | Ultrathin LED backlight module and liquid crystal television |
| KR101040654B1 (en) * | 2010-05-28 | 2011-06-10 | 엘지이노텍 주식회사 | Backlight unit and display device including the same |
| CN107632332A (en) * | 2017-10-31 | 2018-01-26 | 维沃移动通信有限公司 | A kind of bright enhancement film, backlight module, LCM and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001035224A (en) * | 1999-07-22 | 2001-02-09 | Stanley Electric Co Ltd | Surface light source device |
| JP2001167622A (en) * | 1999-12-07 | 2001-06-22 | Casio Comput Co Ltd | Light source device |
| US6633722B1 (en) * | 1998-04-30 | 2003-10-14 | Nippon Zeon Co., Ltd. | Light guide plate with alicyclic resin |
| CN1508602A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area light source device and light board thereof |
| WO2004097513A1 (en) * | 2003-05-01 | 2004-11-11 | Wooyoung Co., Ltd. | Back light for display device |
| CN1614478A (en) * | 2003-11-08 | 2005-05-11 | 鸿富锦精密工业（深圳）有限公司 | Backlight module set |
-
2005
- 2005-10-14 CN CNB2005101003648A patent/CN100462802C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633722B1 (en) * | 1998-04-30 | 2003-10-14 | Nippon Zeon Co., Ltd. | Light guide plate with alicyclic resin |
| JP2001035224A (en) * | 1999-07-22 | 2001-02-09 | Stanley Electric Co Ltd | Surface light source device |
| JP2001167622A (en) * | 1999-12-07 | 2001-06-22 | Casio Comput Co Ltd | Light source device |
| CN1508602A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area light source device and light board thereof |
| WO2004097513A1 (en) * | 2003-05-01 | 2004-11-11 | Wooyoung Co., Ltd. | Back light for display device |
| CN1614478A (en) * | 2003-11-08 | 2005-05-11 | 鸿富锦精密工业（深圳）有限公司 | Backlight module set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1949048A (en) | 2007-04-18 |
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Granted publication date: 20090218 Termination date: 20131014 |