Led Tv Final

8/8/2019 Led Tv Final

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Origin of the topicPurpose of the topic

Historical Background of the topicScope of the topic


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E arly 1900sPre World-War II

1950s1960-19801980-20002000 - Modern Day

& now here we are with L E Ds


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BacklightForm of an illumination used in LCDsUsed to illuminate from the back of the displaypanelUsed in small displays to increase the readabilityin low light conditionsAlso used in monitors and LCD TVs to produce

light similar to a CRT display


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E dge-lit

However to create super thin TVs,there was need to eliminate the extralayer of L E Ds i.e. backlighting L E Ds

LE

Ds are affixed to all four sides ofthe TV and light is projected inwardsto the centre of the TV via lightguidesThese are commonly known asedge-lit L E D based LCDs


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Contrast and Black LevelsColorViewing AngleSize and costOther Factors


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LIQUID CRYSTALSFacts making LCDS possible


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Introduction Working PrincipleMaterial Technologies

i) Small moleculesii) Polymer light-emitting diode


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AdvantagesDisadvantagesCommercial Uses

Manufacturers


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Mass consumer during 2000The old reversed projection TVAmazing ClarityTV quality redefinedPower consumption & Compact size


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Coming attractions

Two to three years out

In ten years time


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Attempts made to solve problems of LCDbacklighting Saves energyThinner and light in weightLarge screens still keeping size small


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Thats from our side.So what are you waiting for ???LE D TVs are waiting in the market tobe bought to your home.Its good-bye to the old picture tubeand plasmas and even LCDs.Here comes L E D !!!


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Thank You

LED TV


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Those days TVs were huge and had smallscreens

Back


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Fully electric TV was perfectedComparatively smaller than previous era TVs

Back


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TVs started looking like now-a-days TVsE ven color TVs came into existence

Back


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TVs become a lot popularHome video recorders were createdTVs become a popular part of home

Back


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TVs started looking like what they are nowRemote controls became less expensive &become very popular in early 1990sIn 1997, Pioneer introduced the first plasmaTVBack


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Having a TV was now cool !!!Plasmas, LCDs, HDTVs and so on LCD TVs had become the mainstreamThey covered 50% of all TVs shippedglobally in 2008They come in all sizes and shapes i.e. from 12

inch to 108 inchBack


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Sony was the first manufacturer to produce acommercial L E D-backlight LCD TVIn addition to RGB L E D backlighting alsointroduced the first flat panel monitor to useedge L E D lighting in 2008

Back


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Samsung was the first to coin the term L E DTV on their 2009 range of Luxia L E D edge-litTVIt also had integrated L E D backlights into 40,48, 52 and 57 inch versions

of their LN-T81F series in 2007 & their A950series in 2008Back


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It introduced the AQUOS LC-XS1US series52 and 65 inch HDTVs to use L E Dbacklighting Plans to release L E D edge-lit HDTVs insecond half of 2009

Back


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Released their own L E D back-lit HDTVLE D backlighting is also becoming commonin computer monitors

Back


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A typical OL E D is composed of an emissivelayer, a conductive layer, a substrate, aanode and cathode terminals

Schematic of a 2-layer OL E D: 1. Cathode (),2. E missive Layer, 3. E mission of radiation, 4.Conductive Layer, 5. Anode (+)Back


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Was developed at E astman KodakProduction process is a bit expensive thanother techniquesDisplay is not flexibleMolecules commonly used are organo-metalchelates and conjugated dendrimersBack


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It emits light when connected to an externalvoltage sourceThe substrate used can be flexible, hence also

known as Flexible OL E Ds (FOL E Ds)Typical polymers include poly (p-phenylenevinylene) and polyfloureneApplications in solid state lighting Back


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Anwell Technologies Ltd.Chi Mei CorporationDuPontGE Global ResearchLGSamsung SonyBack


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3DTV

Holographic TV

Back


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Panasonic plans to develop televisions thatenable viewers to browse the InternetThe display model acts as a home networkserverThis TV enables online video chatting andcontrol of the home's Webcam securityBack


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Visitors can experience the Digital Wall at thePanasonic CenterThis is one thing you will for sure want inyour home !!!

Back


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Light can be polarizedLiquid crystals can transmit and changepolarized light.The structure of liquid crystals can bechanged by electric current.There are transparent substances that can

conduct electricity.Back

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