idf display interchange ability course

8/6/2019 Idf Display Interchange Ability Course

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Enabling Notebook PanelInterchangeability ThroughStandardization

Kamal Shah

Mobile Platforms Group

Intel Corporation

Rieko KataokaMobile PC Group

IBM Japan

Feb 18, 2003


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Agenda Life Before Standards

Panel Interchangeability and SPWG*

SPWG* 3.0 Specification Essentials

SPWG 3.0 Specification & Panel Power

* Other names and brands may be claimed as the property of others


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Typical Notebook PC withDisplay Sub-Assembly

Typical DisplaySub-Assembly

Inv.

Housing

Flex Cable

Bezel

Panel

CCFL CableBack cover

Life Before Standards

Notebook PC Display Sub-Assembly


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Problems Abound

Typical FPC

Typical WireHarness

Life Before Standards

Standards needed to enable interchangeability and reduce cost

Standards needed to enable interchangeability and reduce cost

Connector location,pin out undefined

Multiple cablingsolutions, EMIissues

Mounting holevariation

Screen center variation

Lack of uniform definitionof parameters (brightness,contrast ratio, viewingangle, etc.)


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SPWG: Standard Panel Working

Group Notebook makers

Notebook suppliers

Notebook LCD connector / cable suppliers Notebook LCD component suppliers

Display market research companies

Others: Software, glass, color filter, PC

components, etc.

Panel Interchangeability and SPWG


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What Is Panel Interchangeability?

Mobile PC DisplayRequirementsSpecification

SizeResolution

Contrast ratioMax brightnessBrightness uniformityViewing angleMax powerColor chromaticity..

..


A

SupplierA

Supplier B

B

SupplierC

C

For a given size and other display requirements,Mobile PC makers can use panels from multiplesuppliers Interchangeably


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SPWG Specification Features and

Timeline


13.3, 14.1, 15.0XGAMechanical /Electrical Interface20 pin connector

SPWG 1.013.3, 14.1, 15.0 XGA,SXGA+, UXGA, QXGAMechanical/electricalInterface30 pin connectorConfiguration(DDC2/EEDID) support

SPWG 2.0 SPWG 3.0

1999 2000 2001 2002 2003 2004

Good StartBetter

Needs Driven


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Benefits of Panel Interchangeability /

Standardization Flexibility of multiple suppliers

Simplification of manufacturing

Lower cost

Ease of serviceability

Inventory minimization

Streamlined end-of-life supply management

Ability to upgrade

Ability to focus on value added features

Standardization benefits both suppliers and notebook makersStandardization benefits both suppliers and notebook makers



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SPWG 3.0 vs. SPWG 2.0

SPWG 3.0 Specification Essentials

YESNOPanel power measurementmethodology defined

YESNOPanel screen defects defined

YESNOInverter location, connector, pinout defined

YESNOOptical parameters andmeasurement methodologiesdefined

XGA, SXGA+,UXGA, QXGA,WXGA, WSXGA+,WUXGA

XGA, SXGA+,UXGA, QXGA

Resolutions

12.1, 12.1W,13.3,14.1, 15.0,15.4W, 17W

13.3, 14.1,15.0

Sizes

SPWG 3.0SPWG 2.0Feature


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Mechanical / Electrical

Interchangeability New panel size support

Outside dimensions

Mounting hole locations

Bezel opening

CCFL wire length and exit location, connector type

I/O connector location, type, and interface pin out

Enhanced configuration support through displaydata table (EEDID) extension

Week of mfg LVDS channels

SMBUS inverter value



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LCDmodule

CCFL Wire

Back Enclosure(Front Bezel not

shown)

InverterConnector

CCFL connector

InverterHingeMechanism

Inverter Cable

Connectors to theMotherboardLCD I/O Cable

or FPC


Defining Inverter Connectivity

CCFL wireExit location

SPWG 2.0 specification deals with items in blue

CCFL wire exit location, wire length, connector, pin out aredefined

Many companies violate CCFL wire length specificationbecause of the location they choose to place the inverter


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LCDmodule

CCFL Wire

Back Enclosure(Front Bezel not

shown)CCFL connector

InverterHingeMechanism

Inverter Cable

Connectors to theMotherboardLCD I/O Cable

or FPC


Defining Inverter Connectivity

CCFL wireExit locationInverter location

InverterConnector

SPWG 3.0 specification adds items in purple Inverter location, connector, and pin out are now

defined

This will prevent CCFL wire length violations


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Serviceability Example


LCD supplier unable to duplicate displayproblems

No upfront integrated reliability testing


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Opportunity to Improve Reliability

Current: Inverters are added to LCDs separately


Proposal: Inverter integration by LCD suppliers

Benefit: Improved reliability and interchangeability


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Visual Performance Parameter

Definition and Measurement

Interchangeable panels must providesimilar end user experiences

Common definition of parameters required

Uniform measurement methodologiesrequired



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Optical Parameters: MeasurementMethodology Definitions

Luminance

Luminance uniformity

Color gamut

Color gamma

Response time

Residual image

Contrast ratio

Viewing angle



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Example: Luminance Measurement


0% 25% 50% 75% 100% 0%

25%

50%

75%

100%

1 2

3 4

5

Luminance = 1 + 2 + 3 + 4 + 5

5

SPWG 3.0 takes interchangeability to the next levelSPWG 3.0 takes interchangeability to the next level

All measurements are done in dark ambient List of suggested equipment list is provided

Luminance measured at the average of five white screenmeasurements


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SPWG EBL WG

Notebook

DisplayPower

SPWG / EBL-WG Common Interests

SPWG and EBL WG collaboration ensures Display power measurement

Opportunity for display power reduction

SPWG 3.0 Specification and Panel Power


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Panel Power & Luminance Measurements

Measurements:

Pe = LCD Panel Electronics Power [W]

Pb = LCD Backlight Power [W]

L = Luminance [Nits]Calculations:

Total Panel Subsystem Power = Pe + Pb [W]


System

LCD

Inverter

Pe

Pb

L


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An Opportunity For Power Reduction

SPWG 3.0 specifies inverter location,connector, and pin out

Potential for inverter integration by theLCD suppliers

Opportunity to design a matched, highefficiency inverter for a given specific panel

Result: most power optimized operation ofthe panel


SPWG 3.0 specification includes recommendations for panel powermeasurement and provides an opportunity for power reduction

SPWG 3.0 specification includes recommendations for panel powermeasurement and provides an opportunity for power reduction


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Summary

Standards are needed to enableinterchangeability and reduce cost

Standardization enables interchangeability

that benefits both suppliers and PC makers SPWG 3.0 specification takes

interchangeability to the next level

SPWG 3.0 specification includes

recommendation for panel powermeasurement and provides an opportunityfor panel power reduction


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Next Steps

Panel Vendors: Design SPWG 3.0compliant panels

Panel Connector Vendors: Design SPWG

3.0 compliant connectors PC makers: Request SPWG 3.0 compliant

panels from your panel suppliers

Suppliers and Mobile PC Makers: Support SPWG 3.0specification, for more information please visitwww.spwg.org

Suppliers and Mobile PC Makers: Support SPWG 3.0specification, for more information please visitwww.spwg.org


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Acronyms

SPWG: Standard Panel Working Group(www.spwg.org)

EEDID: Enhanced Extended Display

Identification Data ( more information atwww.vesa.org)

DDC: Display Data Channel ( moreinformation at www.vesa.org)

EBL WG: Mobile PC Extended Battery LifeWorking Group ( www.eblwg.org)


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Please fill out the SessionEvaluation Form.

Thank You!


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idf display interchange ability course

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