LG 光扩散

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Introduction of LUMIPLASWhat is LED?LED (Light Emitting Diode): a kind of semiconductor device designed to produce a light (ray)1/17Characteristics of LEDStrong point of LED■ Low energy consumption ■ Long life ■ Short response time ■ Color expression ■ Environment friendly (Hg free) ■ Design flexibility (small size)EnergyLifetimeResponse2/17LED Application History3/17Applications of LED4/17Applications of LED5/17Plastic materials in LED lampPlastic applicable parts in LED lampLamp cover (Plastic, Glass) Optical partLED Heat Sink Controller Lamp headHeat sink (Aluminum, metal)Housing (Aluminum, metal)Lamp cover Materials Light diffusion materialHeat sinkHousingThermal conductive material6/17Introduction of diffusion materials for LED lampCharacteristics of LED light- LED will replace incandescent & fluorescent lamp due to lots of its benefits - For LED light, new light diffusion material is needed for hiding hot spot and acquiring high luminanceTips for selecting diffusion materials (for illumination or signboard)Optical Properties - Transmittance - Diffusion ability : Haze and hiding ability (LED hot spot)Product Structure- Thickness of plate - Distance : between lamp and lamp : between lamp and diffusion plate - Physical properties (impact..) - Flammability - Weatherability ΜOther Considerations7/17Introduction of diffusion materials for LED lampComparison of diffusion materials between different optical properties• Uneven brightness • Insufficient hiding powerEven brightness Hiding hot spot• Even but lower brightness • Insufficient hiding ability8/17Introduction of diffusion materials for LED lampLUMIPLAS• LG Chem developed new materials for LED with high efficiency of light diffusion• LUMIPLAS has excellent Optical properties - Optimized optical properties [ Transmittance and Haze (diffusing power)] - Various kinds of optical gradesLEDStraight lightDiffusing materialsDiffused lightLUMIPLASHigh haze Low loss of light• Optical base resin • High performance diffuser9/17Introduction of LUMIPLAS•LG Chem has 2 groups of products-LD590 series (MMA rich alloy) : Excellent optical properties and processibility -Product groups of LUMIPLASLD7000FLD590T -08537-08991Μ•Optical properties,•Processibility,•Impact strength LD590TAdvantages LD590 -08090-08287ΜIllumination / Signboard •Optical properties,•Processibility*LD590ApplicationsLD7000FA LD7000FGΜLD7850LD7800ΜLD7550Grade •Optical properties,•Impact strength,•Thermal resistance,•Flame retardancy•Optical properties,•Impact strength,•Thermal resistance LD7(XX)0Product groupOptical propertiesTransmittance (Tt), Haze , Diffusion factor (DF), Half angle (HA)37.864.799.465LD7000FG*11.519.696.975LD7000FA*12.416.196.1860777357.991.899.858LD755054.385.599.760LD760016.626.497.87408537LD590T10.514.196.17808570 4.58.792.68608090LD59026.842.699.0770828733.658.899.470LD770026.646.099.275LD775045.973.199.565LD7650LD780098.595.598.7Haze(%)19.539.462089918087Tt (%) 1 mm34.015.8DF 20.410.1LD7850HA ProductTt & Haze : measured by HazemeterDF and HA : measured by GoniophotometerTransmitting abilityDiffusing ability*) Flammability: V-0 (1.6mm)(*) Test methodsCharacteristics111189g / 10 minASTM D1238Melt Flow Rate-LD590 series: 220℃/10kg -LD7000 series: 300℃/1.2kgHBUL9484°C ASTM D648Thermal properties 12513081Heat distortion temperature-18.6kg/㎠V-0 (1.6mm)V-2 (1.6mm)HBFlammability8023,000950150630LD77001025,00080030500LD590T 806Kg·cm/cmASTM D25623,00028,000950900Kg/cm 2Kg/cm 2ASTM D79015020630550Kg/cm 2Kg/cm 2ASTM D638Mechanical properties Tensile strength Tensile elongation Flexural strength Flexural modulus Impact strength(notched Izod)LD7000FALD590Unit Test Method PropertyUL cardRoHSWeather resistant propertiesWeathering test※Light from LED does not contain UV-ray•No needs of weather resistancy for indoor using [ general grade of LUMIPLAS ]•Only for outdoor, weatherability is needed [UV-resistant grade of LUMIPLAS]•Test method : Weather-o-meter [ Xenon arc, 0.35 W/m 2at 340nm, 63°C, Cycle {102min (Light) + 18min(Light + water) ]•Samples: 1mm thickness specimensLD590T-0857010161000h ΔELD7650General grade LD590T-W085705.07.71000h ΔELD7650U UV-resistant grade02468101214161805001000Tim e (hr)D e l t a ELD7650LD7650U0246810125001000Tim e (hr)D e l t a ELD590T-08570LD590T-W08570ComparisonChemical resistanceUV stability Processibility( thermo forming..)Low temp.Impact strength Impact strength Transparency PSPMMA LUMIPLAS(PC alloy)LUMIPLAS(MMA rich alloy): Excellent: Good: Normal: Weak: PoorTips for selecting suitable gradeOptical materials should be selected by considering the structure of application productBulb typeFlat panel typeTube typeRecommendedCharacteristics •LD7800, LD7850, LD7890, LD590-08090•High transmittance and low haze∵long distance between lamp and cover RecommendedCharacteristics•LD7650, LD7700, LD7750•Medium transmittance and medium haze -∵long distance between lamp and cover -long distance between lamp and lamp RecommendedCharacteristics •LD7600, LD7650, LD7700•Low transmittance and High haze∵short distance between lamp and cover ※The suitable grade may differ from above examples due to the structure of final product.[Attach] Test methods for optical propertiesTest methods< Hazemeter >Light sourceSampleDetectorTp Td •Tt (Total transmittance) = Td + Tp (JIS 7361)•Haze = Td / Tt•Total transmittance (Tt) : Total amount of transmitted light•Haze , Diffusion Factor (DF) and Half Angle (HA) : different kinds of methods for indicating the light diffusing ability< Goniophotometer >•DF (Diffusion factor) =DetectorLight sourceSampleI(20°)+ I(70°)2 ×I (5°)×1000°-90°+90°Td•HA : angle at which half of normal value is measured。