CN101806428A - Light guide plate - Google Patents

Light guide plate Download PDF

Info

Publication number
CN101806428A
CN101806428A CN200910007260A CN200910007260A CN101806428A CN 101806428 A CN101806428 A CN 101806428A CN 200910007260 A CN200910007260 A CN 200910007260A CN 200910007260 A CN200910007260 A CN 200910007260A CN 101806428 A CN101806428 A CN 101806428A
Authority
CN
China
Prior art keywords
lgp
reflective particle
light
shell
base material
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.)
Granted
Application number
CN200910007260A
Other languages
Chinese (zh)
Other versions
CN101806428B (en
Inventor
谢政洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TAIWAN NANOTECHNOLOGY CORP
Original Assignee
TAIWAN NANOTECHNOLOGY CORP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TAIWAN NANOTECHNOLOGY CORP filed Critical TAIWAN NANOTECHNOLOGY CORP
Priority to CN2009100072600A priority Critical patent/CN101806428B/en
Publication of CN101806428A publication Critical patent/CN101806428A/en
Application granted granted Critical
Publication of CN101806428B publication Critical patent/CN101806428B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Optical Elements Other Than Lenses (AREA)

Abstract

The invention relates to a light guide plate which is characterized by comprising a base material and a plurality of reflection particles, wherein the base material is made from thermoplastic plastics; the reflection particles are spread in the base material, and the average particle diameter is 0.1 mum to 100 mum; each reflection particle is respectively provided with a core and a shell made from metallic oxides including Al2O3,ZnO or ZrO2 and the like; the core is made from SiO2 or TiO2 or materials the same as that of the shell. Therefore, the light guide plate has high light transmittance, can also uniformly spread light rays sent from a light source, and can be used for replacing combination of the conventional light guide plates and diffusion plates.

Description

LGP
Technical field
The present invention is relevant with LGP, the even LGP that spreads of light that refers to that especially a kind of light transmittance is high and light source can be sent.
Background technology
The general employed backlight module of LCD consists predominantly of light source, LGP, reflecting plate, diffuser plate, brightness enhancement film and polarisation conversion film, wherein, the major function of LGP is the directing light direction, even to improve the panel light briliancy and to control brightness, reflecting plate is used for preventing that LGP bottom light from leaking outside, to increase the service efficiency of light, the function of diffuser plate is that the light that LGP is penetrated diffuses into a uniform surface light source.
Traditional LGP is that method with ejection formation is with polymethyl methacrylate (polymethylmethacrylate, PMMA) make ganoid plate, apparatus high reflectance and the not material of extinction then, stamp circular or square diffusion point at bottom surface of light guide plate with screen painting, when light source places the LGP side, these diffusion points can be with upwards reflection of light, light is penetrated by the LGP end face, but even inadequately by the light that the LGP end face penetrates, need could form uniform area light source by the effect of diffuser plate.
Because LGP and diffuser plate are the significant components that influences the backlight module optical efficiency, have become industry and have demanded researching and developing improved target for a long time urgently.
Summary of the invention
At the problems referred to above, main purpose of the present invention is to provide a kind of LGP, and its light transmittance height can evenly spread the light that light source sent simultaneously.
For achieving the above object, a kind of LGP provided by the present invention is characterized in that comprising: a base material, and made by thermoplastic; A most reflective particle intersperse among in the described base material, and average grain diameter is 0.1 μ m～100 μ m, and each described reflective particle has respectively a core and a shell, and described shell is by Al 2O 3, B 2O 3, BaCO 3, Bi 2O 3, CaCO 3, CeO 2, Cr 2O 3, CoO, Co 3O 4, CuO, Dy 2O 3, Er 2O 3, Eu 2O 3, Fe 2O 3, Ga 2O 3, Ge 2O 3, Gd 2O 3, HfO 2, Ho 2O 3, In 2O 3, K 2O 3, La 2O 3, Li 2CO 3, MgO, MgCO 3, Mn 2O 3, Mn 3O 4, MoO 3, Nb 2O 5, Nd 2O 3, NiO, PbO, Pb 3O 4, Pr 6O 11, Sb 2O 3, SiO 2, Sm 2O 3, SnO 2, SrCO 3, Ta 2O 5, Tb 4O 7, TeO 2, WO 3, V 2O 5, Y 2O 3, Yb 2O 3, ZnO or ZrO 2Made.
In the technical scheme of the invention described above, described core is by SiO 2Or TiO 2Made.
The average thickness of described shell is 0.05 μ m～50 μ m.
Described core is made by identical material with described shell.
The average grain diameter of each described reflective particle is 1 μ m～10 μ m.
The average grain diameter of each described reflective particle is 3 μ m～5 μ m.
The weight of each described reflective particle is 0.1～20% of described LGP weight.
Each described reflective particle is approximately spherical in shape.
Adopt technique scheme, the present invention is owing to be provided with most reflective particle in LGP inside, when light is entered by LGP side or bottom surface, light is reflected towards all directions by these reflective particle, and form a uniform area source at the LGP end face, make LGP have the function of diffusing light concurrently.Moreover, because the particle diameter of these reflective particle is minimum, influence the light transmittance of LGP hardly, do not see difference with pure PMMA plate fully by naked eyes.Thus, LGP of the present invention can replace the combination of traditional LGP and diffuser plate, reduces the light loss between traditional LGP and diffuser plate, and improves the briliancy and the uniformity.
Description of drawings
Fig. 1 is the schematic diagram of a preferred embodiment of the present invention.
The specific embodiment
Now lifting following examples also is elaborated to structure of the present invention and effect by reference to the accompanying drawings.
As shown in Figure 1, the LGP 10 that a preferred embodiment of the present invention provided includes a base material 12 and most reflective particle 14.
Base material 12 is made by thermoplastic, for example methacrylic resin (methyl methacrylate resin), polyvinyl chloride (polyvinyl chloride) or polystyrene (polystyrene), wherein, methacrylic resin includes polymethyl methacrylate (polymethyl methacrylate), polyethyl methacrylate, polypropylmethacryla,es, polybutyl methacrylate or polymethylacrylic acid pentyl ester.
Each reflective particle 14 is spherical in shape and intersperse among equably in the base material 12, analysis result according to HORIBA LB-500 high concentration ultra micro Size Distribution Analyzer (dynamic light scattering submicron particle size distributionanalyzer), the average grain diameter of each reflective particle 14 is about 3 μ m～5 μ m, each reflective particle 14 has respectively a core 16 and a shell 18, and core 16 is by SiO 2Made, 18 of shells are by Al 2O 3Made, the average thickness of shell 18 is about 1.5 μ m～2.5 μ m, and the weight of each reflective particle 14 is about 1% of LGP 10 weight.
During Practical manufacturing, reflective particle 14 Uniform Dispersions of earlier grinding being finished are to the methyl methacrylate oligomer, the moulding of recycling pouring type, under suitable temperature, make simultaneously the further polymerization of methyl methacrylate form polymethyl methacrylate (PMMA), can form the LGP 10 that inside has most reflective particle 14.
Because LGP of the present invention 10 inside have most reflective particle 14, when light is entered by LGP side or bottom surface, light is reflected towards all directions by these reflective particle 14, and form a uniform surface light source at LGP 10 end faces, make LGP 10 have the function of diffusion light concurrently, if light source 20 is located at LGP 10 sides, then a reflecting plate 22 can be established in LGP 10 bottom sides, is used to avoid light to spill (as shown in Figure 1) by LGP 10 bottoms.Moreover, because the particle diameter of these reflective particle 14 is minimum, influence the light transmittance of LGP 10 hardly, do not see difference with pure PMMA plate fully by naked eyes.Thus, LGP 10 of the present invention can replace the combination of traditional LGP and diffuser plate, reduces the light loss between traditional LGP and diffuser plate, and improves briliancy and the uniformity.
Based on spirit of the present invention, the composition of LGP, the composition of reflective particle or size all can be changed, further experiment shows: the average grain diameter of reflective particle all can at 0.1 μ m～100 μ m, better with 1 μ m～10 μ m, the average thickness of shell 18 0.05 μ m～50 μ m also can, shell 18 can be by other metal oxide such as B 2O 3, BaCO 3, Bi 2O 3, CaCO 3, CeO 2, Cr 2O 3, CoO, Co 3O 4, CuO, Dy 2O 3, Er 2O 3, Eu 2O 3, Fe 2O 3, Ga 2O 3, Ge 2O 3, Gd 2O 3, HfO 2, Ho 2O 3, In 2O 3, K 2O 3, La 2O 3, Li 2CO 3, MgO, MgCO 3, Mn 2O 3, Mn 3O 4, MoO 3, Nb 2O 5, Nd 2O 3, NiO, PbO, Pb 3O 4, Pr 6O 11, Sb 2O 3, SiO 2, Sm 2O 3, SnO 2, SrCO 3, Ta 2O 5, Tb 4O 7, TeO 2, WO 3, V 2O 5, Y 2O 3, Yb 2O 3, ZnO or ZrO 2Made.16 of cores can be by SiO 2, TiO 2Or made with shell 18 identical materials, the weight of each reflective particle 14 can be 0.1～20% of LGP 10 weight.Such as these easy full of beard and variation, all should be the present patent application claim and contain.

Claims (8)

1. LGP is characterized in that comprising:
One base material, made by thermoplastic;
A most reflective particle intersperse among in the described base material, and average grain diameter is 0.1 μ m～100 μ m, and each described reflective particle has respectively a core and a shell, and described shell is by Al 2O 3, B 2O 3, BaCO 3, Bi 2O 3, CaCO 3, CeO 2, Cr 2O 3, CoO, Co 3O 4, CuO, Dy 2O 3, Er 2O 3, Eu 2O 3, Fe 2O 3, Ga 2O 3, Ge 2O 3, Gd 2O 3, HfO 2, Ho 2O 3, In 2O 3, K 2O 3, La 2O 3, Li 2CO 3, MgO, MgCO 3, Mn 2O 3, Mn 3O 4, MoO 3, Nb 2O 5, Nd 2O 3, NiO, PbO, Pb 3O 4, Pr 6O 11, Sb 2O 3, SiO 2, Sm 2O 3, SnO 2, SrCO 3, Ta 2O 5, Tb 4O 7, TeO 2, WO 3, V 2O 5, Y 2O 3, Yb 2O 3, ZnO or ZrO 2Made.
2. LGP as claimed in claim 1 is characterized in that: described core is by SiO 2Or TiO 2Made.
3. LGP as claimed in claim 2 is characterized in that: the average thickness of described shell is 0.05 μ m～50 μ m.
4. LGP as claimed in claim 1 is characterized in that: described core is made by identical material with described shell.
5. LGP as claimed in claim 1 is characterized in that: the average grain diameter of each described reflective particle is 1 μ m～10 μ m.
6. LGP as claimed in claim 1 is characterized in that: the average grain diameter of each described reflective particle is 3 μ m～5 μ m.
7. LGP as claimed in claim 1 is characterized in that: the weight of each described reflective particle is 0.1～20% of described LGP weight.
8. LGP as claimed in claim 1 is characterized in that: each described reflective particle is spherical in shape approximately.
CN2009100072600A 2009-02-17 2009-02-17 Light guide plate Expired - Fee Related CN101806428B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009100072600A CN101806428B (en) 2009-02-17 2009-02-17 Light guide plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009100072600A CN101806428B (en) 2009-02-17 2009-02-17 Light guide plate

Publications (2)

Publication Number Publication Date
CN101806428A true CN101806428A (en) 2010-08-18
CN101806428B CN101806428B (en) 2012-01-18

Family

ID=42608326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009100072600A Expired - Fee Related CN101806428B (en) 2009-02-17 2009-02-17 Light guide plate

Country Status (1)

Country Link
CN (1) CN101806428B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182964A (en) * 2011-04-29 2011-09-14 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
CN103322440A (en) * 2012-03-23 2013-09-25 潘文莘 Luminous module changing light advancing path through interior reflection
CN103576233A (en) * 2012-08-08 2014-02-12 三星显示有限公司 Light guide plate and manufacturing method of the same
CN103923418A (en) * 2014-05-06 2014-07-16 南京信息工程大学 High-ultraviolet absorption capacity material and preparation method thereof
CN113979747A (en) * 2021-11-18 2022-01-28 厦门乃尔电子有限公司 Modified lead zirconate titanate piezoelectric ceramic with additional bismuth antimonate and preparation method thereof
CN116482894A (en) * 2023-04-20 2023-07-25 苏州桐力光电股份有限公司 Display module
WO2024108666A1 (en) * 2022-11-22 2024-05-30 喜洋阳南京科技发展有限公司 Rayleigh scattering light guide plate and manufacturing method therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182964A (en) * 2011-04-29 2011-09-14 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
CN103322440A (en) * 2012-03-23 2013-09-25 潘文莘 Luminous module changing light advancing path through interior reflection
CN103322440B (en) * 2012-03-23 2015-06-03 潘文莘 Luminous module changing light advancing path through interior reflection
CN103576233A (en) * 2012-08-08 2014-02-12 三星显示有限公司 Light guide plate and manufacturing method of the same
CN103923418A (en) * 2014-05-06 2014-07-16 南京信息工程大学 High-ultraviolet absorption capacity material and preparation method thereof
CN103923418B (en) * 2014-05-06 2016-02-03 南京信息工程大学 A kind of high ultraviolet absorption ability material and preparation method thereof
CN113979747A (en) * 2021-11-18 2022-01-28 厦门乃尔电子有限公司 Modified lead zirconate titanate piezoelectric ceramic with additional bismuth antimonate and preparation method thereof
WO2024108666A1 (en) * 2022-11-22 2024-05-30 喜洋阳南京科技发展有限公司 Rayleigh scattering light guide plate and manufacturing method therefor
CN116482894A (en) * 2023-04-20 2023-07-25 苏州桐力光电股份有限公司 Display module

Also Published As

Publication number Publication date
CN101806428B (en) 2012-01-18

Similar Documents

Publication Publication Date Title
CN101806428B (en) Light guide plate
US20100247901A1 (en) Light guiding plate
JP2010171010A (en) Light guide plate
KR102342045B1 (en) Light-diffusing laminate, backlight unit, and liquid crystal display device
US7891852B2 (en) Illumination system using phosphor remote from light source
JP7266584B2 (en) Direct-emitting backlight unit with 2D local dimming
EP3258167A2 (en) Optical constructions incorporating a light guide and low refractive index films
EP2093592A1 (en) Antiglare film, display employing the same, light-diffusing film, and surface light source system employing the same
CN102027394A (en) Light control film with off-axis visible indicia
CN204228987U (en) A kind of optically focused brightness enhancement film
JPWO2017026062A1 (en) Optical sheet, surface light source device and display device
KR20170067149A (en) Light diffusion sheet for overlaying, and backlight unit
CN208027043U (en) Direct-light-type backlight and liquid crystal display
JP2016194552A (en) Quantum dot sheet, backlight device, display, and manufacturing method of quantum dot sheet
CN105700062A (en) Quantum dot glass light guide plate
JP2007329007A (en) Point light source backlight, and liquid crystal display device
CN102135266A (en) Light guide plate and manufacturing method
WO2017119399A1 (en) Lightguide plate
KR20100073459A (en) Light guiding panel, method fof manufacturing the same and backlight unit with using the same
CN107479251A (en) Fluorescent powder film and backlight module
US20190107662A1 (en) Backlight units comprising a thin light guide plate and a light coupling unit
US10018327B2 (en) Optical sheet unit
JP5724527B2 (en) Light guide plate laminate and manufacturing method thereof
TW201400947A (en) Illumination converter
CN104969102A (en) Assymetric input lightguide

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120118

Termination date: 20160217