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1、eDPEmbedded DisplayPortThe New Generation Digital Display Interface for Embedded ApplicationsDisplayPort Developer Conference | December 6, 2010 | Westin TaipeiCraig Wiley Sr. Director of Marketing of Parade Technologies, Inc. VESA Board of Directors Vice-chair, Notebook Task Group ChaireDP Topics O
2、verview of eDP eDP Compared to DisplayPort, iDP, and LVDS eDP Features and Evolution of the StandardQuick Summary of eDP E mbedded DisplayPort (eDP) was developed to be used specifically in embedded display applications Notebook, Netbook, and Notepad PCs All-in-One PCs eDP is Based on the VESA Displ
3、ayPort Standard Same electrical interface, and can share the same video port on the GPU Same basic digital protocol, but with some differences added for eDP In PC applications, eDP will replace LVDS over the next few years eDP will add new system capabilities while reducing system cost, power, and s
4、izeEmbedded PC Displays Will Transition from LVDS to eDP over the Next Few Years Integrated GPU transition from LVDS to eDP will be fully complete in 20132009201020112012First Production Year for eDP Notebooks20132014LVDS no longer supported by integrated GPUsLVDSeDP0%100%Initial eDP Spec Released D
5、ec 2008How does eDP compare to DisplayPort or iDP?DisplayPort External display Interface Needs to interoperate with any external DP Display Many optional features tailored for external display flexibility: HDCP, audio, dual-mode adapters, multi-stream, etc Embedded DisplayPort (eDP) Internal display
6、 interface for PC products Uses same GPU video port as external DisplayPort connections Examples where eDP would be utilized: notebooks, netbooks, notepads, all-in-one systems Based on DisplayPort standard with some modifications Protocol and features optimized for internal display use Only needs to
7、 interoperate with dedicated system displayInternal DisplayPort (iDP) Internal Interface developed for DTV and display system products Not directly compatible with DisplayPort Standard Unique iDP interface and protocol Optimized for simplicity and extensibility (more data pairs) Enables very high re
8、solutions and refresh rates Not applicable for external portsPC with Embedded DisplayGPU or ChipsetDisplayPort Output eDPDisplayPortDisplayPort OutputDTV with Embedded DisplayiDPeDP Rx TCON Display PanelVideo ProcessoriDP OutputiDP Rx TCON Display PaneleDP Utilizes the DisplayPort GPU Interface No d
9、edicated video port needed for embedded displays (unlike LVDS) Main Link lane count of interface can be scaled to fit display data rate requirements AUX Channel and HPD serve as a side-band channel for display configuration and controlNotebook PC Motherboard or Video SubsystemDisplay PanelMain Link
10、(1 to 4 lanes)Aux ChannelBacklight controlTCONeDP Sink FunctionVideo / Graphics Processing Unit (GPU)DP or eDP Source FunctionDisplay EDID MemoryLED BacklighteDP InterfaceHPDOptional Backlight Control SignaleDP vs. DisplayPortCompliance and InterconnectDisplayPorteDPOverall protocol and interconnect
11、Set by standards, consistency required for external display interoperabilityFlexible, depends on the requirement of the system and dedicated displayProtocol RequirementsCovered by DisplayPort Standard and Compliance Test SpecificationsThe eDP Standard provides recommended guidelines, but system inte
12、grators may modify implementation to fit system requirements.Some specific requirements may be set by the GPU vendor.Compliance TestingCovered by Compliance StandardsInterface requirement established by system integrator and/or GPU vendor.Source-Sink InteroperabilityCovered by the DisplayPort Standa
13、rd and other VESA documentsSystem integrator and GPU vendor determine eDP Source and Sink requirements.Interface Connector Standard or mini-DP connector30 or 40 pin panel connection depending on system configuration.Interface CableStandard DisplayPort CableDifferent types of cables can be used. Comm
14、on cable types include twisted pair and micro coax.Like the connector, cable choice is determined by system integrator based on system design requirements and Source and Sink ability.eDP Provides All Panel Connections in One Plug Includes all power, data and control signalsLCD Panel AssemblyeDP TCON
15、LCD DisplayColumn DriversLCD InterfacePixel FormattereDP ML ReceiverRow DriversPC Motherboard or Graphics CardGPUeDP TransmitterBacklight ControlAUX Ch InterfaceBacklight DriverDevice Status and ControlEDID and Configuration EPROMTCON and LCD PowerBacklight PowereDP Interface Provides the Complete P
16、anel ConnectionMain LinkAUX and HPDCommon Pin Out for eDP Panel Connector (One or Two lanes, with LED backlight driver on panel)Table 5-3 in eDP v1.2PinSignal NameDescription1NC - RESERVEDRESERVED for LCD manufacturers use 2H_GNDHigh Speed Ground 3Lane1_NComplement Signal Link Lane 1 4Lane1_PTrue Signal Link Lane 15H_GNDHigh Speed Ground 6Lane0_NComplement Signal Link Lane 07
