CN1949047A - Light guiding plate and backlight module - Google Patents
Light guiding plate and backlight module Download PDFInfo
- Publication number
- CN1949047A CN1949047A CN 200510100361 CN200510100361A CN1949047A CN 1949047 A CN1949047 A CN 1949047A CN 200510100361 CN200510100361 CN 200510100361 CN 200510100361 A CN200510100361 A CN 200510100361A CN 1949047 A CN1949047 A CN 1949047A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- light
- module backlight
- geometric center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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, forms many mesh points of which density is gradually increased from the edge to the geometric center. 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 light guide plate and module backlight, relate in particular to a kind of light guide plate and module backlight 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 this bottom surface forms a plurality of sites, and its density is strengthened to this geometric center gradually by its edge.
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, near these a plurality of incidence surfaces, the geometric center of this bottom surface is to this light guide plate sunken inside respectively for these a plurality of light sources, this bottom surface forms a plurality of sites, and its density is strengthened to this geometric center gradually by its edge.
Compared with prior art, light guide plate has the following advantages: adopt the dot density design that begins to strengthen gradually to this geometric center direction from the edge of this bottom surface can effectively improve the emitting brightness homogeneity of whole light guide plate.So, adopt the module backlight of this light guide plate 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 module schematic top plan view backlight of preferred embodiment two of the present invention.
Fig. 5 is the schematic cross-section of Fig. 4 along the V-V 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.This exiting surface 222 is a minute surface.
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 sites 228 respectively, and site 228 density on each inclined-plane begin to strengthen gradually to this geometric center direction from the base on this inclined-plane.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, so adopt the dot density design that begins to strengthen gradually from the base on this inclined-plane can effectively improve the emitting brightness homogeneity of whole light guide plate to this geometric center direction near the position of corresponding incidence surface 221.Need to prove, can regulate the rational proportion that dot density increases progressively from the base, reach best emitting brightness homogeneity effect according to the degree of tilt on the inclined-plane of the bottom surface 224 of light guide plate 22 and the size of this light guide plate 22.
A plurality of site 228 of the present invention can form the printing ink site by the mode of ink printing, perhaps carries out chemical etching by mask and produces the site with fine scattering cloudy surface.Four inclined-planes that are formed at this bottom surface 224 by the mode of ink printing are adopted in these a plurality of sites 228 of present embodiment, and these a plurality of sites 228 comprise general printing ink site or contain the printing ink site of scattering diluent.
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.
In addition, for hanging down, the relative center section of two ends luminosity that further solves this line source 21 cause 22 4 corners of this light guide plate to form the problem of dark space easily.The light guide plate 22 of this enforcement can be in the bottom surface four corners of 224 carry out dot density and strengthen design, promptly the dot density of these bottom surface 224 4 corners is bigger than the inclined-plane dot density at its close adjacent incidence surface 221 centers, the brightness that is used to improve corresponding site.
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.When light guide plate was circle, module backlight can adopt sphere shape light and the collocation of this light guide plate.
In addition, the bottom surface that it is emphasized that light guide plate of the present invention also can be designed to a curved surface concave inward structure except being designed to a taper concave inward structure, and this curved surface can be that a sphere also can be an ellipsoid.Wherein, this bottom surface forms a plurality of sites, and its density is strengthened to this geometric center gradually by its edge.Above-mentioned design can reach technique effect of the present invention equally.
See also Fig. 4 and Fig. 5, 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 site 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 light source of the present invention also can adopt L type or round 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.
Light guide plate of the present invention has the following advantages: adopt the dot density design that begins to strengthen gradually to this geometric center direction from the edge of this bottom surface can effectively improve the emitting brightness homogeneity of whole light guide plate.And this light guide plate carries out dot density and strengthens design in a plurality of corners of bottom surface, can solve that the relative center section of two ends luminosity by this line source is low to cause a plurality of corners of this light guide plate to form the problem of dark space easily, further improves the emitting brightness homogeneity.In addition, adopt the reflection shield of integral type to have preferable physical strength, can provide better protection these a plurality of line sources and light guide plate.So module backlight of the present invention has the high and high advantage of physical strength of emitting brightness homogeneity.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included in the present invention's scope required for protection.
Claims (13)
1. light guide plate, it comprises:
One exiting surface;
One with this exiting surface opposed bottom surface; With
Connect a plurality of incidence surfaces of this exiting surface and this bottom surface, the geometric center of this bottom surface it is characterized in that this bottom surface forms a plurality of sites, and its density is strengthened gradually to this geometric center by its edge to this light guide plate sunken inside.
2. light guide plate as claimed in claim 1 is characterized in that this exiting surface is a minute surface.
3. light guide plate as claimed in claim 1 is characterized in that the edge of this geometric center and this bottom surface forms a cone-shaped body, makes this bottom surface form a plurality of inclined-planes.
4. light guide plate as claimed in claim 3 is characterized in that the dot density of this bottom surface corner is bigger than the dot density on the inclined-plane at its close adjacent incidence surface center.
5. light guide plate as claimed in claim 1 is characterized in that this site comprises printing ink site and the site with fine scattering cloudy surface.
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 it is characterized in that this bottom surface forms a plurality of sites, and its density is strengthened gradually to this geometric center by its edge to this light guide plate sunken inside.
9. module backlight as claimed in claim 8 is characterized in that this light source comprises linear pattern cathode fluorescent tube, L type cathode fluorescent tube, round cathode fluorescent tube and light emitting diode.
10. module backlight as claimed in claim 8 is characterized in that the edge of this geometric center and this bottom surface forms a cone-shaped body, makes this bottom surface form a plurality of inclined-planes.
11. module backlight as claimed in claim 10 is characterized in that the dot density of this bottom surface corner is bigger than the dot density on the inclined-plane at its close adjacent incidence surface center.
12. module backlight as claimed in claim 8 is characterized in that this module backlight further comprises a reflection shield, 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.
13. module backlight as claimed in claim 12 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 |
|---|---|---|---|
| CN 200510100361 CN1949047A (en) | 2005-10-14 | 2005-10-14 | Light guiding plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510100361 CN1949047A (en) | 2005-10-14 | 2005-10-14 | Light guiding plate and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1949047A true CN1949047A (en) | 2007-04-18 |
Family
ID=38018610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510100361 Pending CN1949047A (en) | 2005-10-14 | 2005-10-14 | Light guiding plate and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1949047A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413640B (en) * | 2007-10-19 | 2012-06-27 | 富士胶片株式会社 | Light guide plate |
| WO2017071030A1 (en) * | 2015-10-29 | 2017-05-04 | 深圳市华星光电技术有限公司 | Backlight unit, backlight module, and backlight module and display device |
| CN109031510A (en) * | 2018-08-24 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of light guide plate and preparation method thereof, backlight module and display device |
-
2005
- 2005-10-14 CN CN 200510100361 patent/CN1949047A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413640B (en) * | 2007-10-19 | 2012-06-27 | 富士胶片株式会社 | Light guide plate |
| WO2017071030A1 (en) * | 2015-10-29 | 2017-05-04 | 深圳市华星光电技术有限公司 | Backlight unit, backlight module, and backlight module and display device |
| CN109031510A (en) * | 2018-08-24 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of light guide plate and preparation method thereof, backlight module and display device |
| CN109031510B (en) * | 2018-08-24 | 2020-06-30 | 京东方科技集团股份有限公司 | Light guide plate and manufacturing method thereof, backlight module and display device |
| US10782469B2 (en) | 2018-08-24 | 2020-09-22 | Boe Technology Group Co., Ltd. | Light guide plate and its fabricating method, as well as backlight module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2862089Y (en) | Light conducting board and back light module unit | |
| CN100370329C (en) | Light conducting plate and back light module | |
| CN1184516C (en) | Back light lighting device | |
| CN100445827C (en) | Light-conducting board and backlight mould set | |
| CN1908754A (en) | Straight down type back light component and liquid crystal display device | |
| US20090067178A1 (en) | Method of forming light-scattering dots inside the diffusion plate and light guide plate by laser engraving | |
| CN1227561C (en) | Plane light source device and liquid crystal display | |
| KR20100024752A (en) | Prism sheet and liquid crystal display having the same | |
| CN1847949A (en) | Vertical back light module | |
| TW201445174A (en) | Multi-function composite optical film | |
| CN1900786A (en) | Light conductive plate and back light module | |
| TWI275858B (en) | Light guide plate | |
| CN100462802C (en) | Backlight module and light guiding plate thereof | |
| JP2003315560A (en) | Light transmission body, surface light source device using the same, and liquid crystal display device | |
| CN1949047A (en) | Light guiding plate and backlight module | |
| KR20080019803A (en) | Prism sheet and backlight assembly and liquid crystal display comprising the same | |
| CN207380278U (en) | A kind of LED backlight structure | |
| KR100977272B1 (en) | Light panel with light diffusion particles | |
| CN2763846Y (en) | Light guiding board | |
| JP2011064745A (en) | Optical sheet, backlight unit and display apparatus | |
| CN1790119A (en) | Backlight module and liquid crystal display | |
| CN1797096A (en) | Plate for guiding light | |
| CN100350311C (en) | Backlight module | |
| CN1790122A (en) | Light guide plate | |
| CN2630892Y (en) | LED area source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |