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43.1: Why Displays Require a New Digital Interface
Author(s) -
Kobayashi Alan
Publication year - 2006
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2433274
Subject(s) - computer science , network packet , scalability , modular design , display resolution , computer hardware , extensibility , demultiplexer , multiplexing , computer network , display device , telecommunications , multiplexer , database , operating system
This paper provides a technical overview of DisplayPort Ver.1.0, a truly open, pending VESA standard for A/V connectivity. DisplayPort is designed to be a scalable and extensible technology foundation for sending digital display and associated data not only between a PC and a display but also between ICs within a system. Its maximum bandwidth is sufficient to support 2560×1600‐resolution with pixel bit depth of 30 bits per pixel over a single DisplayPort cable. For inside‐the‐box application, it reduces the number of wires: LCD panel resolution of up to 1680×1050 can be supported over a single high‐speed differential pair. DisplayPort consists of a uni‐directional Main Link for transporting isochronous A/V streams from Source device to Sink device and a half‐duplex, bi‐directional AUX CH used for realizing robust plug‐n‐play ease of use. Both Main Link and AUX CH are made of AC‐coupled differential pairs. The Main Link may have 1, 2, or 4 pairs (or lanes), each capable of supporting application bandwidth of 270Mbytes/second while AUX CH has 1 pair. DisplayPort requires no pair for forwarding clock, thus enabling the maximum usage of the differential pairs. Adopting a layered and modular architecture, DisplayPort can take leverage the advancement of the Physical Layer without affecting upper layers. Based on “micro‐packet” architecture, DisplayPort is seamlessly extensible for supporting transport of multiple A/V streams and other data types for new display applications.