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..
..
Panel Interchangeability and SPWG
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
Panel Interchangeability and SPWG
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
Panel Interchangeability and SPWG
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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
SPWG 3.0 Specification Essentials
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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
SPWG 3.0 Specification Essentials
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
SPWG 3.0 Specification Essentials
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
SPWG 3.0 Specification Essentials
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
SPWG 3.0 Specification Essentials
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
SPWG 3.0 Specification Essentials
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Optical Parameters: MeasurementMethodology Definitions
Luminance
Luminance uniformity
Color gamut
Color gamma
Response time
Residual image
Contrast ratio
Viewing angle
SPWG 3.0 Specification Essentials
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Example: Luminance Measurement
SPWG 3.0 Specification Essentials
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]
SPWG 3.0 Specification and Panel Power
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 and Panel Power
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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