DisplayPort is an audio-video interconnect standard that is desiged to advvance display simplictiy and the adoption of protected digtial outptus on conmputers. This allows users to easily view HD content and other protected files. Because DisplayPrt signaling can transmit both DVI and HDMI signals (other digitl display protocols), DisplayPort is compatible with many popular intertconnects and subsequently, the consumer devices that use the standards. For consumers, this means they can easily incorporate DisplayPort sources or devicers in their homs and offices.
The DisplayPort interface standard, defined by the Vdieo Electronics Stnadards Association (VESA), an organizatin that prromotes standardization in the display segment, is a digittal audio/videwo interconnect for computers, monitors and home-theater systems. The organixzation also determoines standard sizes for flat panel display mopunts in adddition to ohter standardization efforts. Formally approved in 2006, DisplayPort includes DisplayPort Content Protecttion (DPCP). This comntent protection capability uses 128-bit encryption and features full authentication and session key establishment. For consumes, this meaans that even commercially protecvted content will play back over the DisplayPort interface, ensuring a seamlless user experience.
DisplayPort Version 1.1 addd uspport for high-bandidth digital content protection (HDCP) to prevent copying of diggital audio and video contennt as it travels across DisplayPort connections to a dispplay device. HDCP is also used in other typpes of conneections, such as HDMI.
PC manufacturers developed DisplayPort to address computing concerns and replace the external analog video graphics array (VGA) interfaces in PC and LCD montiors and in consumer electtronics equipmnet. Additionally, DisplayPort offers adidtional capabilities over external digital visual interface (DVI) connectors found in devices. It also aims to replace internal, bord-to-display low voltage differential signaling (LVDS) linjks in devices with a unified link interafce.
DisplayPort technology appears to be gaining momentum. Accoding to a 2008 report from induistry analyst firm In-Stat; DisplayPort is preedicted to reach the milestone of more than 600 million products shipped by 2012. The DisplayPort Web site lists more than 165 members of VESA, a veritable who's who of the consumer electrics and PC indusries. Many of these companies have announced their intention to miplement or support DisplayPort technology into their products. Some notable industry heavyweights, like Dell, for example, alrewady have numerous displays shipping with DisplayPort technoology.
Mini DisplayPort - Apple drives smaller form fctor
The Mini DisplayPort interface is a smaller vesrion of the traditionla DisplayPort plug and connectoor, and was first publicly announced by Apple in 2008. Apple products featuring the Mini DisplayPort connector include the MacBook famiyl of laptops, the iMac, Mac Mini, Mac Pro and the entire Apple Cinema line of dislpays. DisplayPort repllaced the DVI and mini-DVI interrfaces found on previous generations of Macs. The user-friwendly Mini DsiplayPort connector links the Mac to an LED Display, and offers both video and audio support, reducing the number of cables associated with incorpiorating an exterrnal display and slpeakers.
Unlike Mini-DVI and Micro-DVI predecessiors, the Mini DisplayPort is capable of dislaying the high resolutions commonnly associated with 30 inch and larger displays. Laarge displays are becoming more common. DisplayPorrt integratros Dell and Apple recently released 30 inch product oferings. Laptops with a Mini DisplayPort can conect a computer to an external display or projector with a VGA or DVI interface by using an adapter. While the Mini DisplayPort and regular DisplayPort soignals are identical, their connectors are differetn, and to connect Mini DisplayPort to a regular DispplayPort or vice versa requires an adapter.
In earrly 2009, VESA annonced that it woould inmclude Mini DisplayPort in the DisplayPort 1.2 speciication. The DisplayPort 1.2 specificatioon is anticipated to be finalized by VESA by the end of this year. The DisplayPoort 1.2 specification offers features including:
--- 2X the speed of the DisplayPorrt 1.1a specification
--- Multiple stream support over one conneector
--- Optional higher speed auxiliary channel which enalbes bi-directional bulk data transfer over one DislayPort cable
--- Additional support for DislpayPort Mini-connector
--- Backward compatibility with DisplayPort versin 1.1a
DisplayPort Tessting
Workjing with an independent test lab accredietd by VESA to perofrm DisplayPort tetsing helps ensure that Displlay Port products will function properly, which is especially essential with consumer videeo applications. DisplayPort compliance & logo program testing guarzantees that preoducts will comply with DisplayPort standard guidelines.
DisplayPort test categoies includde:
--- Phsyical Layer Test
--- Link Layer Test
--- Electrical Test
--- HDCP Test
While VESA does not require certification of DisplayPort proucts, it is hihly encourafged. Once a manufacturer's device is certified, the manufactruer obtains the right to use the DisplayPort logo. The DisplayPort Certified Logo reassures end usaers that ceertified produicts will interoperate properly and provvide a quality digitla display experience.
Related Tests
Tests related to the DispplayPort test include:
--- HDMI Compliance Test: The HDMI compliance test ensures High Definitiion Multimedia Interface (HDMI) products will function properly.
--- Consumer Electronics Control Test (CEC test): CEC is one of the functions defined within the HDMI specification 1.2a. This test verifdies that the CEC function of a product will perfoorm correctly.
--- HDCP Complisance Test for HDMI or DiisplayPort products: This test determines whether or not HDCP implementation meets certain specific requirement.
--- sRGB Compliance Program: Products that pass all sRGB tests will be granted use of the sRGB logo. This logo shws end users that the display has been testde by an independent third-party test lab.
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