1、1從背從背光光源源角角度度改改進(jìn)進(jìn)亮亮度度可增加燈管數(shù)，增加燈源功率，但都會(huì)導(dǎo)致耗電大、體積加大其次從導(dǎo)光板角度，這對(duì)導(dǎo)光板的材料、設(shè)計(jì)提出了很高的要求；從燈管后的反射膜及導(dǎo)光板下面的反射片角度，提高反射效率，增加反射亮度 在導(dǎo)光板與下層偏光片之間加棱鏡膜和多層膜 AngleAbsorptionPolarization2 角度控制- 棱鏡膜AngleAbsorptionPolarizationPitchApex AngleTotal Internal Reflection“白色” 反射板棱鏡膜應(yīng)用于棱鏡膜應(yīng)用于LCDLCD模件中模件中 導(dǎo)引導(dǎo)光板光線(xiàn)的點(diǎn)CCFL燈管和反射片擴(kuò)散板導(dǎo)光板(隱藏顆

2、粒)寬闊的出光角度70控制出光角度Brightness Enhancement FilmsTopBottomLCD微復(fù)制技術(shù)4DiffuselyrecycledTIR*Total Internal ReflectionDiffuseIllumination70BEF棱鏡膜棱鏡膜如何增亮？如何增亮？重復(fù)反射，大約重復(fù)反射，大約5050的入射的入射光會(huì)被反射回去而被再利用光會(huì)被反射回去而被再利用折射可利用折射光增折射可利用折射光增加加 40 407070低比例損失重新進(jìn)入下一個(gè)棱鏡擴(kuò)散板擴(kuò)散板5如何測(cè)試亮度測(cè)試設(shè)備xyq False color indicate areas of constant

3、 luminance q ranges from 0o to 60o ranges from 0o to 360o亮度高Display一片棱鏡膜一片棱鏡膜BEF II Polar Plots中心點(diǎn)輝度中心點(diǎn)輝度: 55.12 nits45視角輝度視角輝度: 41.12 nits水平水平1/2視角視角: 60.0垂直垂直1/2視角視角: 51.5Integrated Intensity: 107.66 lm/m2中心點(diǎn)輝度中心點(diǎn)輝度: 86.31 nits45視角輝度視角輝度: 46.09 nits水平水平1/2視角視角: 47.5垂直垂直1/2視角視角: 32.0Integrated Inte

4、nsity: 106.42 lm/m2中心點(diǎn)輝度中心點(diǎn)輝度: 113.3 nits45視角輝度視角輝度: 30.59 nits水平水平1/2視角視角: 24.0垂直垂直1/2視角視角: 22.5Integrated Intensity: 88.96 lm/m2二片棱鏡膜二片棱鏡膜551107BEF II - Horizontal Scans020406080100120-60-40-200204060Angle (deg)Luminance (nits)DisplayBEF II 90/50 xBEF II 90/50亮度增加8BEF II - Vertical Scans0204060801

5、00120-60-40-200204060Angle (deg)Luminance (nits)DisplayBEF II 90/50 xBEF II 90/509RBEF: 棱鏡尖峰倒圓棱鏡尖改為圓角防止鄰近表面光耦合寬視角: 半亮度 34 (垂直方向), 48 (水平方向)影像亮度變化柔和單片增亮45%10Matte SurfacePitchPrismAnglePrism Peak RadiusRBEF90/50-12TRBEF90/50-12MRBEF90/50-8TRBEF90/50-8MThinknessPrism AnglePitchPrism Peak RadiusMatte S

6、urface155 m160 m155 m160 m90o90o90o90o50 m12 mYes50 m12 mNo50 m8 mYes50 m8 mNo產(chǎn)品種類(lèi)：產(chǎn)品種類(lèi)：構(gòu)造：構(gòu)造：RBEF- Rounded Brightness Enhancement FilmPETAcrylic Resin11WBEF: 波浪狀棱鏡結(jié)構(gòu)可耐較高溫度單片增亮30%兩片交叉疊放增亮45%寬視角: 半亮度 38 (垂直方向), 48 (水平方向)影像亮度變化柔和適合航空、汽車(chē)工業(yè)的導(dǎo)航儀器設(shè)備應(yīng)用聚碳酸酯12W818W520W525ThicknessPrism AnglePitchPrism Peak R

7、adiusMatte Surface180 m200 m250 m97o97o97o10019 mYes10016 m平滑平滑100 m16 m平滑平滑ThinknessPrism AnglePrism Peak RadiusPitchMatte SurfacePolycarbonateWBEF- 波浪狀增亮片 構(gòu)造：構(gòu)造：產(chǎn)品種類(lèi)：產(chǎn)品種類(lèi)：BEF III? ?=3新一代微復(fù)制棱角構(gòu)造的增光片=提供兩種選擇 T（透明的背材）M（matte backside）=棱角表面利用3隨機(jī)結(jié)構(gòu)的模具所制造MatteBEF III/TBEF III/M14為何用為何用BEFBEF III ? 消除光學(xué)干擾

8、現(xiàn)象消除光學(xué)干擾現(xiàn)象隨機(jī)棱角的構(gòu)造可以消除Wet-OutWet-Out增加Matte的背材可以降低 Moir以及Cut-Off的光學(xué)影響 減少或取消擴(kuò)散板的使用減少或取消擴(kuò)散板的使用結(jié)合隨機(jī)棱鏡的設(shè)計(jì)和Matte基材，可使光線(xiàn)的出光更加柔和、均勻 降低不良降低不良/ /提高優(yōu)良率提高優(yōu)良率 Matte基材可以提高BEF的平整性、不易變形。結(jié)合隨機(jī)棱鏡的設(shè)計(jì)和Matte基材，可隱藏背光板內(nèi)小的不良。15AngleAbsorptionPolarization 偏振光控制- 多層膜背光源LCDDBEFPSPSSSPP損失50亮度增加60亮度DBEF工作原理上偏光片下偏光片17DBEF 產(chǎn)品DBEF-

9、P: 針對(duì)LCD 屏的解決方案 - 將 底部偏光片與多層膜集成到一張膜 - 裝配更加方便 - 更高的亮度 (大約 7%),減少一層空氣層 DBEF-M: 針對(duì)背光源的解決方案霧化面多層膜膠層吸收型偏光片多層膜nominal 132 umnominal 280 um18厚型DBEF產(chǎn)品DBEF-D: 針對(duì)背光源的解決方案425 m 光學(xué)粘合劑 Polycarbonate 光學(xué)粘合劑 Vikuiti DBEF Polycarbonate 散射層散射層反射型偏光片優(yōu)勢(shì)優(yōu)勢(shì): 受熱后不易變形表面缺陷少增亮60%19DBEF 效果Random LightguideCrossed Thin BEF Dif

10、fuse ReflectorLCD ModuleWhite LEDsDBEF-ECrossedThin BEFIncludeDBEF-EConfigurationBacklight Module Thickness (mm)Axial Luminance (cd/m2)Integrated Intensity (lm/m2)Axial Efficiency (Cd/W)Luminous Efficiency (L/W)Horizontal HWHMVertical HWHM9-Point Uniformity Lmin/LmaxCrossed Thin BEF1.1613.413.55.72%

11、5.80%24.529.480.87%Crossed Thin BEF + DBEF-E1.3117.321.67.40%9.25%28.350.582.16%29% axial gain and 60% increase in total light output with DBEF* compared to Thin BEF aloneOn-Axis Brightness: 55.27 nitsBrightness Gain: 0%Hor. 1/2 Brightness Angle: 60.0Ver. 1/2 Brightness Angle: 55.0Integrated Intensi

12、ty: 105.62 lm/m2On-Axis Brightness: 83.10 nitsBrightness Gain: 50.3%Hor. 1/2 Brightness Angle: 47.0Ver. 1/2 Brightness Angle: 32.5Integrated Intensity: 103.2 lm/m2On-Axis Brightness: 108.7 nitsBrightness Gain: 96.7%Hor. 1/2 Brightness Angle: 24.0Ver. 1/2 Brightness Angle: 23.0Integrated Intensity: 8

13、5.57 lm/m2On-Axis Brightness: 87.27 nitsBrightness Gain: 57.9%Hor. 1/2 Brightness Angle: 60.0Ver. 1/2 Brightness Angle: 55.0Integrated Intensity: 172.32 lm/m2On-Axis Brightness: 114.60 nitsBrightness Gain: 107.4%Hor. 1/2 Brightness Angle: 50.0Ver. 1/2 Brightness Angle: 35.0Integrated Intensity: 159.

14、88 lm/m2On-Axis Brightness: 130.80 nitsBrightness Gain: 137.7%Hor. 1/2 Brightness Angle: 27.0Ver. 1/2 Brightness Angle: 28.0Integrated Intensity: 129.63 lm/m221DBEF Horizontal Scans020406080100120140160-60-40-200204060Angle (deg)Luminance (nits)DisplayDBEFDBEF + BEF II 90/50DBEF + xBEF II 90/5022Ang

15、leAbsorptionPolarization 吸收光控制- 反射膜主要原因:反射更多的光能量1.在光再循環(huán)過(guò)程中保存更多的光23反射膜工作原理 導(dǎo)光板工作原理- TIR 全反射-光線(xiàn)傳送- 逃出/再循環(huán)光線(xiàn)-顯示器照明 光線(xiàn)并非按最佳方向射出 導(dǎo)光板反射膜反射錯(cuò)誤方向射出的光線(xiàn)EXAMPLE Wedge Lightguide50%50% 光線(xiàn)從上下方向射出ReflectorEfficiencyNumber ofBouncesReducedReflectivity80%532.7%85%544.3%90%559.0%95%577.3%99%595.0%24 Enhanced Specular

16、 Reflector is a 98%, non-metallic specular reflector. ESRs product attributes make it ideal for application as a bulb cavity reflector in LCD backlights.BELOW the DisplayLightguideLampESR高效率的反射膜25ESR Spectral Reflectivity0%10%20%30%40%50%60%70%80%90%100%380430480530580630680730780Wavelength% Reflectivity ESR SilverluxSuper26Conclusions and Solutions3M Vikuiti Display Enhancement Film SolutionsVikuiti Thin BEFVikuiti DBEFVikuiti ESR Products developed by VOC input Past VOC focus: - Brightness- Viewing Angle-