CN103939844A - Diffusion sheet and backlight module - Google Patents
Diffusion sheet and backlight module Download PDFInfo
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- CN103939844A CN103939844A CN201310017044.0A CN201310017044A CN103939844A CN 103939844 A CN103939844 A CN 103939844A CN 201310017044 A CN201310017044 A CN 201310017044A CN 103939844 A CN103939844 A CN 103939844A
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- atomization
- district
- strengthened
- diffusion sheet
- light
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Abstract
A diffusion sheet comprises a light-extraction area and an atomization enhancing area which are connected, and the atomization effect of the atomization enhancing area on light is better than that of the light-extraction area on the light. The invention further provides a backlight module comprising the diffusion sheet. The backlight module can effectively eliminate the bright spot phenomenon and has little influence on light-extraction efficiency of the light.
Description
Technical field
The present invention relates to a kind of diffusion sheet and comprise the backlight module of described diffusion sheet.
Background technology
Recently liquid crystal display is universal gradually, wherein backlight module (Back light module) is one of key part and component of panel of LCD (LCD panel), because liquid crystal itself is not luminous, the function of backlight module is well-off brightness and the light source being evenly distributed, normally show image.Backlight module is at present gradually by cold cathode ray tube (Cold Cathode Fluorescent Lamp, CCFL) transfer to and adopt light emitting diode (Light Emitting Diode, LED), utilize light emitting diode to there is the advantages such as high brightness, low-power consumption, high color purity as backlight.
Utilize at present in the application of LED element as backlight module, be mainly divided under LGP, directly enter lower light emitting-type and LGP side light inlet type to light-conducting type backlight.Wherein under LGP, the full run-down type of light inlet type arranges backlight under display floater exiting surface,, because LED element is originally as spot light, directly descend the backlight module of light emitting-type easily in display frame, produce speck, color spot or the unequal phenomenon of bright dark areas and can increase module gross thickness.For addressing the above problem, develop the backlight at side direction light type side light inlet, arrange by LED element on the side of relative viewing area, utilize spot light conversion that the micro-structural of LGP side sends LED to be line source and enter LGP inside, the line source of LGP internal delivery penetrates LGP upper surface via the optics cloth of LGP bottom (vertical glass) area source that the line source of horizontal direction (parallel glass) converts vertical direction to of naming a person for a particular job, and then through diffusion sheet, area source is done to uniform diffusion and atomizing effect.
But, be provided with a side of LED at LGP, because the light inlet of LGP has speck (hot spot) phenomenon conventionally, light is inhomogeneous.And all adopt the diffusion sheet that atomizing concentration is larger to make whole diffusion sheet, will affect the light extraction efficiency of whole backlight module.
Summary of the invention
In view of this, be necessary to provide a kind of diffusion sheet and backlight module, to address the above problem.
A kind of diffusion sheet, it comprises that interconnective output optical zone and atomization strengthen district, the effect that described atomization is strengthened district light being carried out to atomization is better than the atomizing effect to light of described output optical zone.
A kind of backlight module, it comprises LGP, multiple light source and described diffusion sheet, described LGP has incidence surface and exiting surface, described multiple light source is arranged at incidence surface, described diffusion sheet is arranged at a side of described LGP exiting surface, described LGP is for the light of light source is incident to LGP and from exiting surface outgoing from incidence surface, and the incidence surface setting of district along described LGP strengthened in the atomization of described diffusion sheet, for eliminating the speck of light inlet of described LGP.
With respect to prior art, the diffusion sheet that the present embodiment provides, strengthen district, thereby the light inlet that can eliminate LGP has speck phenomenon conventionally, thereby make the light inlet light of LGP even owing to being provided with atomization with light source adjacent.And the atomizing effect of the output optical zone of diffusion sheet is less than atomization and strengthens the atomizing effect in district, thereby can avoid the impact of the light extraction efficiency of output optical zone on emergent ray.Therefore, the backlight module that the technical program provides can be eliminated the speck of LGP light inlet, and can ensure to have higher light extraction efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the backlight module that provides of first embodiment of the invention.
Fig. 2 is the structural representation of the backlight module that provides of second embodiment of the invention.
Main element symbol description
| Backlight module | 100、200 |
| LGP | 10 |
| Incidence surface | 11 |
| Exiting surface | 12 |
| Light source | 20 |
| Diffusion sheet | 30、40 |
| Output optical zone | 31、41 |
| District is strengthened in atomization | 32、42 |
| District is strengthened in the first atomization | 421 |
| District is strengthened in the second atomization | 422 |
Following detailed description of the invention further illustrates the present invention in connection with above-mentioned accompanying drawing.
Detailed description of the invention
Refer to Fig. 1, first embodiment of the invention provides a kind of backlight module 100, and it comprises LGP 10, multiple light source 20 and diffusion sheet 30.
Described LGP 10 is tabular, and it has incidence surface 11 and the exiting surface 12 adjacent with incidence surface.Described incidence surface 11 is mutually vertical with exiting surface 12.Described LGP 10 is line source for the light source conversion that light source 20 is sent and enters LGP 10 inside from incidence surface 11, and the line source of LGP 10 internal delivery converts the exiting surface 12 that penetrates LGP 10 perpendicular to the area source of exiting surface 12 to and goes out to establish via the name a person for a particular job line source that is parallel to exiting surface 12 of the optics cloth of LGP 10 bottoms.
Multiple light sources 20 are arranged at incidence surface 11, for to the interior incident light of LGP 10.In the present embodiment, light source 20 is LED light source.Described multiple light source 20 arranges along described incidence surface 11.Preferably, described multiple light source 20 is along incidence surface 11 spaced sets.For reducing light scattering in air of light source outgoing, this LGP 10 can be contacted with corresponding light source 20.For example, in the present embodiment, the incidence surface 11 of LGP 10 and the packaging body of this LED light source contact.
Described diffusion sheet 30 is arranged at a side of the exiting surface 12 of LGP 10.The shape of described diffusion sheet 30 and size are all identical with proterties and the size of LGP 10.Described diffusion sheet 30 and the overlapped setting of described LGP 10.Described diffusion sheet 30 comprises interconnective output optical zone 31 and atomization reinforcement district 32.Described atomization is strengthened district 32 and is arranged near the incidence surface 11 of described LGP 10, and along incidence surface 11 along stretching direction setting.In the direction perpendicular to described incidence surface 11, the situation that the width in described atomization reinforcement district 32 has speck according to light source 20 at light inlet is set, hide so that described speck is strengthened to district 32 by atomization, thereby reach atomization, to strengthen part LGP 10 bright dippings that cover of district 32 even.
The output optical zone 31 of described diffusion sheet 30 also can have atomizing, so that it is even to obtain bright dipping.The effect that described atomization is strengthened district 32 light being carried out to atomization is better than the atomizing effect to light of described output optical zone 31.Particularly, if described diffusion sheet 30 is the surperficial printing opacity plate body that is formed with micro-structural, the density of the micro-structural in described atomization reinforcement district 32 is greater than the micro-structural density of output optical zone 31.If described diffusion sheet 30 is while being formed with the plate body of diffusion material for inner or surface, the distribution density that the diffusion particle in district 32 is strengthened in described atomization is greater than the density that the diffusion particle of output optical zone 31 distributes.Described diffusion particle can be for can be any one in air, silica (silica), polymethyl methacrylate (PMMA), glass and plastics.In the present embodiment, it is identical to the atomizing effect of light that district 32 is strengthened in described atomization, and the described atomization reinforcement micro-structural in district 32 or the distribution density of diffusion particle are identical.
The diffusion sheet 30 that the present embodiment provides, strengthen district 32, thereby the light inlet that can eliminate LGP has speck phenomenon conventionally, thereby make the light inlet light of LGP even owing to being provided with atomization with light source 20 adjacents.And the atomizing effect of the output optical zone 31 of diffusion sheet 30 is less than atomization and strengthens the atomizing effect in district 32, thereby can avoid the impact of the light extraction efficiency of output optical zone 31 on emergent ray.Therefore, the backlight module that the technical program provides can be eliminated the speck of LGP light inlet, and can ensure to have higher light extraction efficiency.
Refer to Fig. 2, second embodiment of the invention provides a kind of backlight module 200, and it comprises LGP 10, multiple light source 20 and diffusion sheet 40.Wherein, the LGP that LGP 10 and multiple light source 20 provide with the first embodiment and the structure of multiple light sources and arrange identical.
Described diffusion sheet 40 is arranged at a side of the exiting surface 12 of LGP 10.The shape of described diffusion sheet 40 and size are all identical with proterties and the size of LGP 10.Described diffusion sheet 40 and the overlapped setting of described LGP 10.Described diffusion sheet 40 comprises interconnective output optical zone 41 and atomization reinforcement district 42.Described atomization is strengthened district 42 and is arranged near the incidence surface 11 of described LGP 10, and along incidence surface 11 along stretching direction setting.In the direction perpendicular to described incidence surface 11, the situation that the width in described atomization reinforcement district 42 has speck according to light source 20 at light inlet is set, hide so that described speck is strengthened to district 32 by atomization, thereby reach atomization, to strengthen part LGP 10 bright dippings that cover of district 32 even.
The output optical zone 41 of described diffusion sheet 40 also can have atomizing, so that it is even to obtain bright dipping.The effect that described atomization is strengthened district 42 light being carried out to atomization is better than the atomizing effect of described output optical zone 41 to light.Particularly, if described diffusion sheet 40 is the surperficial printing opacity plate body that is formed with micro-structural, the density of the micro-structural in described atomization reinforcement district 42 is greater than the micro-structural density of output optical zone 41.If described diffusion sheet 40 is while being formed with the printing opacity plate body of diffusion particle for inner or surface, the distribution density that the diffusion particle in district 42 is strengthened in described atomization is greater than the density that the diffusion particle of output optical zone 41 distributes.Described diffusion particle can be for can be any one in air, silica (silica), polymethyl methacrylate (PMMA), glass and plastics.
In the present embodiment, atomization is strengthened district 42 and is comprised that district 421 is strengthened in multiple the first atomizations and district 422 is strengthened in multiple the second atomization.Described the first atomization is strengthened the corresponding each light source 20 in district 421 and is arranged, and each the second atomization is strengthened district 422 and is arranged between two adjacent the first atomizations reinforcement districts 421, and the space between each the second atomization reinforcement district 422 and adjacent two light sources 20 is corresponding.Wherein, the first atomization reinforcement district 421 is better than described the second atomizing effect of atomization reinforcement district 422 to light to the atomizing effect of light.Particularly, if described diffusion sheet 40 is the surperficial printing opacity plate body that is formed with micro-structural, the density that micro-structural in district 421 is strengthened in described the first atomization is greater than the density of the micro-structural in described the second atomization reinforcement district 422.If described diffusion sheet 40 is while being formed with the printing opacity plate body of diffusion particle for inner or surface, the distribution density that the diffusion particle in district 421 is strengthened in described the first atomization is greater than described the second atomization strengthens the distribution density of the diffusion particle in district.
The diffusion sheet that the present embodiment provides and backlight module are except having the effect of diffusion sheet that the first embodiment provides and backlight module, further, the diffusion sheet 40 that the technical program provides, by arranging, district 421 is strengthened in the first atomization being mutually arranged alternately and district 422 is strengthened in the second atomization, the atomizing effect in the first atomization reinforcement district 421 is better than the atomizing effect in the second atomization reinforcement district 422, thereby near the speck each light source 20 is hidden by the first atomization reinforcement district 421, thereby it is more even to ensure that backlight module goes out light effect.
Be understandable that, those skilled in the art also can do other and change in spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (10)
1. a diffusion sheet, it comprises that interconnective output optical zone and atomization strengthen district, the effect that described atomization is strengthened district light being carried out to atomization is better than the atomizing effect to light of described output optical zone.
2. diffusion sheet as claimed in claim 1, is characterized in that, described diffusion sheet is the printing opacity plate body that surface is formed with micro-structural, and the density of the micro-structural in described atomization reinforcement district is greater than the micro-structural density of output optical zone.
3. diffusion sheet as claimed in claim 1, is characterized in that, described diffusion sheet is the inner or surperficial printing opacity plate body that is formed with diffusion particle, and the distribution density of the diffusion particle in described atomization reinforcement district is greater than the density of the diffusion particle distribution of output optical zone.
4. diffusion sheet as claimed in claim 3, is characterized in that, described diffusion particle is any one in air, silica, polymethyl methacrylate, glass and plastics.
5. diffusion sheet as claimed in claim 1, is characterized in that, it is identical to the atomizing effect of light everywhere that district is strengthened in described atomization.
6. diffusion sheet as claimed in claim 1, it is characterized in that, described atomization is strengthened district and is comprised that district is strengthened in multiple the first atomizations and district is strengthened in multiple the second atomization, each described the first atomization is strengthened district and is arranged between two adjacent the second atomizations reinforcement districts, each described the second atomization is strengthened district and is arranged between two adjacent the first atomizations reinforcement districts, and the atomizing effect to light that district is strengthened in described the first atomization is greater than the second atomization and strengthens the atomizing effect of district to light.
7. diffusion sheet as claimed in claim 6, is characterized in that, described diffusion sheet is the printing opacity plate body that surface is formed with micro-structural, and the density that the micro-structural in district is strengthened in described the first atomization is greater than the micro-structural density in the second atomization reinforcement district.
8. diffusion sheet as claimed in claim 6, it is characterized in that, described diffusion sheet is the inner or surperficial printing opacity plate body that is formed with diffusion particle, and the distribution density that the diffusion particle in district is strengthened in described the first atomization is greater than described the second atomization and strengthens the density that the diffusion particle in district distributes.
9. a backlight module, it comprises LGP, multiple light source and the diffusion sheet as described in claim 1 to 5 any one, described LGP has incidence surface and exiting surface, described multiple light source is arranged at incidence surface, described diffusion sheet is arranged at a side of described LGP exiting surface, described LGP is for being incident to LGP and from exiting surface outgoing by the light of light source from incidence surface, the incidence surface setting of district along described LGP strengthened in the atomization of described diffusion sheet, for eliminating the speck of light inlet of described LGP.
10. backlight module as claimed in claim 9, it is characterized in that, described multiple light sources space arranges, described atomization is strengthened district and is comprised that district is strengthened in multiple the first atomizations and district is strengthened in multiple the second atomization, each described the first atomization is strengthened district and is arranged between two adjacent the second atomizations reinforcement districts, each described the second atomization is strengthened district and is arranged between two adjacent the first atomizations reinforcement districts, the atomizing effect to light that district is strengthened in described the first atomization is greater than the second atomization and strengthens the atomizing effect of district to light, it is mutually corresponding with a light source that district is strengthened in each the first atomization, space between each the second atomization reinforcement district and adjacent two light sources is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310017044.0A CN103939844A (en) | 2013-01-17 | 2013-01-17 | Diffusion sheet and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310017044.0A CN103939844A (en) | 2013-01-17 | 2013-01-17 | Diffusion sheet and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939844A true CN103939844A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310017044.0A Pending CN103939844A (en) | 2013-01-17 | 2013-01-17 | Diffusion sheet and backlight module |
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| Country | Link |
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| CN (1) | CN103939844A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772776A (en) * | 2017-02-16 | 2017-05-31 | 武汉华星光电技术有限公司 | Backlight module and its preparation method |
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| US20080310809A1 (en) * | 2007-06-14 | 2008-12-18 | Chin-Hui Chen | Optical film |
| US7474464B2 (en) * | 2006-01-12 | 2009-01-06 | Entire Technology Co., Ltd. | Diffuser plate with higher light diffusion efficiency and brightness |
| CN101630092A (en) * | 2008-07-15 | 2010-01-20 | 嘉威光电股份有限公司 | Optical diaphragm and backlight module applying same |
| CN101749644A (en) * | 2009-12-31 | 2010-06-23 | 长兴化学工业股份有限公司 | Diffusion membrane and manufacturing method thereof |
| CN102472841A (en) * | 2009-07-08 | 2012-05-23 | 住友化学株式会社 | Light diffusion film and liquid crystal display device comprising same |
| CN102736144A (en) * | 2011-04-12 | 2012-10-17 | 惠和株式会社 | Light diffusion sheet, optical unit, backlight unit and liquid crystal display device |
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2013
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508573A (en) * | 2002-12-16 | 2004-06-30 | 曾志强 | Raw material for controlling fog of diffusion layer |
| US7474464B2 (en) * | 2006-01-12 | 2009-01-06 | Entire Technology Co., Ltd. | Diffuser plate with higher light diffusion efficiency and brightness |
| US20080310809A1 (en) * | 2007-06-14 | 2008-12-18 | Chin-Hui Chen | Optical film |
| CN101630092A (en) * | 2008-07-15 | 2010-01-20 | 嘉威光电股份有限公司 | Optical diaphragm and backlight module applying same |
| CN102472841A (en) * | 2009-07-08 | 2012-05-23 | 住友化学株式会社 | Light diffusion film and liquid crystal display device comprising same |
| CN101749644A (en) * | 2009-12-31 | 2010-06-23 | 长兴化学工业股份有限公司 | Diffusion membrane and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106772776A (en) * | 2017-02-16 | 2017-05-31 | 武汉华星光电技术有限公司 | Backlight module and its preparation method |
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Application publication date: 20140723 |
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