LED-LCD Tv Backlighting

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How Tv Has Evolved

1989

TV Type: CRT

Screen Size < 36”

# of TV per household = 1

Picture: SD

2009

TV Type: LCD (mostly)

Screen Size < 55”

# of TV per household ~ 2.5

Picture: HD

Dramatic increase in Household Power consumption due to larger display size & TV count per house

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LED-LCD TV Energy Consumption Leads To Innovation

CECCEC EUEU

Energy StarEnergy Star

Hard Limit on all Hard Limit on all LCDTV > 50” LCDTV > 50”

Led by Energy Star 5.0

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TV Power Consumption Levels

This requires dramatic improvement in Power/sq-inch with increasing LCDTV sizeThis requires dramatic improvement in Power/sq-inch with increasing LCDTV size

Dimming of LED backlit LCDTV TV can helpDimming of LED backlit LCDTV TV can help

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3 Types of Dimming of LED Backlit LCDTV:Local Dimming Vs Edge Dimming Vs Segment Edge

CostCost

Energy Energy SavingsSavings

Edge DimEdge Dim

Local Dim

Segment Dim

Traditionally Limited by Traditionally Limited by high cost of LED & Drivershigh cost of LED & Drivers

****

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Top Reasons For Local Dimming in LED TV

More Energy Efficient and Better Picture Quality Tops Consumer Wish List for “next” LCD TV purchase

Demand for additional capability such as 3D, Color reproduction etc

- Driven by better and localized LED control & switching speed.

Source: CEABase: Random National Sample of 1000 US Adults

89%

80%

73%

73%

66%

60%

51%

41%

More Energy Efficient

Better Picture Quality

Wireless connection ( to DVD, PVR etc.)

Thinner Shape

Larger Screen Size

Digital Photo Display Capability

Internet Connectivity

More elegant design

Helped by Helped by Local DimmingLocal Dimming

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Best HDTV (Top 3 Are Local Dimmed)

As of 2 weeks As of 2 weeks agoago

Local DimmingLocal Dimming

Local DimmingLocal Dimming

Local DimmingLocal Dimming

PlasmaPlasma

1st1st

2nd2nd

3rd3rd

4th4th

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Market success not only due to Picture Quality

Lessons from Plasma Tv

- Plasma had the Best Picture Quality & still failed to capture TV market share. Why ?

High Power Consumption Average Cost Poor Form Factor

Low Power Consumption Best Picture Quality Thin Form Factor Low Cost

Local dimming LEDTV needs all 4 to be successful

Market FailureMarket Failure

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Cost of LED’s Large Number of LEDs

Includes Bin-ing costs Cost of (too many) discrete Drivers

“Thermal Problem” due to Wasted power causes heat that limits the driving of many LED

channels from one chip Results in having too many driver ICs

= 44%

= 20%

Locally Dimmed LCDTV Difficulties

Source: Power Electronics TechnologySource: Power Electronics Technology

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Innovative Approach Solves the Thermal problem AND reduces cost

iWatt’s unique patent pending Adaptive Switch technology reduces wasted power by up to 60%

Minimizes the thermal problem

Enables driving of very high channel counts from Single IC

Single Chip saves BOM Cost

Wider Vf Bin reduces LED cost

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64 Channel Single Chip LED B/L Driver for LCDTV

Breakthrough Architecture Breakthrough Architecture enables driving of 64 Channelsenables driving of 64 Channels

Industry leading cost & power Industry leading cost & power savingssavings

Ideal for Local dimming and Ideal for Local dimming and segment based edge dimmingsegment based edge dimming

Supports External Boost or BuckSupports External Boost or Buck

75 mA LED current75 mA LED current

Efficiency > 90%, Overall Efficiency > 90%, Overall Matching < 2%Matching < 2%

First LED driver of its kind to drive 64 channel & upto 640 LEDs

iW7040iW7040

Available in Pre-Production quantities by June ‘10

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Benefits of iW7040 LED Driver

Upto 60% reduction in wasted power (compared to similar local dimming LED TV using generic drivers)

Typical Savings of about 2W ~ 4.5W per IC Helps meet the most aggressive Energy Star 5 standard

Significant BOM cost savings due to higher integration (compared to similar LED TV using 8/16 Ch drivers)

Typical savings of around $8-$10 Less component count, smaller pcb, fewer insertions 75% fewer drivers means fewer component failures

Significantly improving reliability and lowering warranty costs

LED Cost Savings Wider Vf bin-ning range saves LED cost

Better picture quality Better TV system matching & local dimming

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7040 Enables Local Dimming by making it cost effective while saving energy

CostCost

Energy SavingsEnergy Savings

Edge DimEdge Dim

Local Dim

Segment Dim

With 7040

With 7040

Energy Efficient LED Is Made Possible

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The perfect LED Backlight Driver ?

• Maximum possible BOM Savings

• Save $8-$10

• No More limitation on Channel Count

User Friendly Graphical Interface

• Solves Thermal Problem

• Save 2-4W per IC

• No More limitation on Vf diff

EASY Application Design

Technology

System

IC

Software

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Summary: Power Management Solutions

Unique Benefits

Core LED Backlight Technology

Digital PWM Control

Adaptive Switching

Adaptive LDO

iMPower

Platform solutions-- “ Converging LCD Display Power Chain “ family

Compelling Technology-- Maximum control for best image quality

Lowest Cost/Channel-- Highest integration

Power ManagementExcellence -- Efficiency, heat & power savings