This article needs additional citations for verification .(March 2012) |
Type | Digital video connector | ||
---|---|---|---|
Production history | |||
Designer | Video Electronics Standards Association | ||
Designed | February 14, 1999 | ||
Superseded | VGA connector | ||
Superseded by | Digital Visual Interface | ||
General specifications | |||
Pins | 20 | ||
Data | |||
Data signal | PanelLink protocol Transition Minimized Differential Signaling | ||
Width | 3 bits plus clock | ||
Max. devices | 1 | ||
Protocol | PanelLink (Serial) | ||
Pinout | |||
Pin 1 | TMDS data 1 + | ||
Pin 2 | TMDS data 1 – | ||
Pin 3 | GND | ||
Pin 4 | GND | ||
Pin 5 | TMDS data C + | ||
Pin 6 | TMDS data C – | ||
Pin 7 | GND | ||
Pin 8 | + 5V | ||
Pin 9 | Reserved | ||
Pin 10 | Reserved | ||
Pin 11 | TMDS data 2 + | ||
Pin 12 | TMDS data 2 – | ||
Pin 13 | GND | ||
Pin 14 | GND | ||
Pin 15 | TMDS data 0 + | ||
Pin 16 | TMDS data 0 – | ||
Pin 17 | Reserved | ||
Pin 18 | Reserved | ||
Pin 19 | DDC data | ||
Pin 20 | DDC clock |
The VESA Digital Flat Panel (DFP) interface standard specifies a video connector and digital TMDS signaling for flat-panel displays. [1] It features 20 pins and uses the PanelLink protocol; the standard is based on the preceding VESA Plug and Display (P&D) standard, ratified in 1997. Unlike the later, electrically-compatible Digital Visual Interface (DVI, 1999), DFP never achieved widespread implementation.
P&D combined analog and digital video with data over USB and FireWire to reduce cable clutter, but the feature creep resulted in an unpopular, expensive connector. [2] : 4 Compaq described DFP as a "transition" step between the analog VGA connector and P&D: DFP was designed by a consortium including Compaq, Hewlett-Packard, and ATI Technologies as a smaller, simpler connector, dropping support for analog video and data in favor of transmitting exclusively digital video signals. [1]
The connector was used by displays such as the Compaq Presario FP400, FP500, FP700, Fp720, 5204, and 5280. It was offered on graphics cards such as the Xpert LCD, [3] and Rage LT Pro by ATI Technologies, and the Oxygen GVX1 [4] by 3Dlabs.
DFP is compatible electrically with P&D (and by extension, DVI); DFP uses the Display Data Channel (DDC) standard level DDC2B for operation and the Extended Display Identification Data (EDID) protocol to identify the display to the host. [5] : §1.2 Like the preceding P&D, DFP uses the PanelLink TMDS protocol developed by Silicon Image for digital video signals. [2]
The DFP standard specifies a 20-pin mini D ribbon connector; [5] : §3.3 however, as the signal protocols are identical, DFP connectors generally are compatible with devices equipped with a DVI interface by using a passive adaptor.
All DFP-compliant devices are required to support resolutions of 640×400, 720×400, and 640×480 (each at a refresh rate of 60Hz) as a minimum level of interoperability, although the resulting display may not necessarily be centered or scaled. [5] : §3.7
DFP was superseded by DVI because DFP, like P&D, is limited to a single-link TMDS signal. In contrast, DVI is capable of higher maximum resolutions because it supports a dual-link TMDS signal; in addition, DVI also supports analog video, which makes the VGA connector redundant. [2]
Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source, such as a video display controller, to a display device, such as a computer monitor. It was developed with the intention of creating an industry standard for the transfer of uncompressed digital video content.
VESA, formally known as Video Electronics Standards Association, is an American technical standards organization for computer display standards. The organization was incorporated in California in July 1989 and has its office in San Jose. It claims a membership of over 300 companies.
A graphics card is a computer expansion card that generates a feed of graphics output to a display device such as a monitor. Graphics cards are sometimes called discrete or dedicated graphics cards to emphasize their distinction to integrated graphics processor on the motherboard or the CPU. A graphics processing unit (GPU) that performs the necessary computations is the main component in a graphics card, but the acronym "GPU" is sometimes also used to refer to the graphics card as a whole.
The Display Data Channel, or DDC, is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.
Apple Inc. sold a variety of LCD and CRT computer displays in the past. Apple paused production of their own standalone displays in 2016 and partnered with LG to design displays for Macs. In June 2019, the Pro Display XDR was introduced, however it was expensive and targeted for professionals. Nearly three years later, in March 2022, the Studio Display was launched as a consumer-targeted counterpart to the professional monitor. These two are currently the only Apple-branded displays available.
The Apple Display Connector (ADC) is a proprietary modification of the DVI connector that combines analog and digital video signals, USB, and power all in one cable. It was used in later versions of the Apple Studio Display, including the final 17" CRT model, and most versions of the widescreen Apple Cinema Display, after which Apple adopted standard DVI connectors on later models.
High-Definition Multimedia Interface (HDMI) is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for analog video standards.
The Video Graphics Array (VGA) connector is a standard connector used for computer video output. Originating with the 1987 IBM PS/2 and its VGA graphics system, the 15-pin connector went on to become ubiquitous on PCs, as well as many monitors, projectors and high-definition television sets.
A composite monitor or composite video monitor is any analog video display that receives input in the form of an analog composite video signal to a defined specification. A composite video signal encodes all information on a single conductor; a composite cable has a single live conductor plus earth. Other equipment with display functionality includes monitors with more advanced interfaces and connectors giving a better picture, including analog VGA, and digital DVI, HDMI, and DisplayPort; and television (TV) receivers which are self-contained, receiving and displaying video RF broadcasts received with an internal tuner. Video monitors are used for displaying computer output, closed-circuit television and other applications requiring a two-dimensional monochrome or colour image.
DB13W3 (13W3) is a style of D-subminiature connector commonly used for analog video interfaces. The 13 refers to the total number of pins, the W refers to workstation and the 3 refers to the number of high-frequency pins.
DisplayPort (DP) is a digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). It is primarily used to connect a video source to a display device such as a computer monitor. It can also carry audio, USB, and other forms of data.
Unified Display Interface (UDI) was a digital video interface specification released in 2006 which was based on Digital Visual Interface (DVI). It was intended to be a lower cost implementation while providing compatibility with existing High-Definition Multimedia Interface (HDMI) and DVI displays. Unlike HDMI, which is aimed at high-definition multimedia consumer electronics devices such as television monitors and DVD players, UDI was specifically targeted towards computer monitor and video card manufacturers and did not support the transfer of audio data. A contemporary rival standard, DisplayPort, gained significant industry support starting in 2007 and the UDI specification was abandoned shortly thereafter without having released any products.
DMS-59 was generally used for computer video cards. It provides two Digital Visual Interface (DVI) or Video Graphics Array (VGA) outputs in a single connector. A Y-style breakout cable is needed for the transition from the DMS-59 output to DVI (digital) or VGA (analogue), and different types of adapter cables exist. The connector is four pins high and 15 pins wide, with a single pin missing from the bottom row, in a D-shaped shell, with thumbscrews. As of December 2020, this adapter cable was listed as obsolete by its primary vendor Molex.
OpenLDI is a high-bandwidth digital-video interface standard for connecting graphics/video processors to flat panel LCD monitors. Even though the promoter’s group originally designed it for the desktop computer to monitor application, the majority of applications today are industrial display connections. For example, displays in medical imaging, machine vision, and construction equipment use the OpenLDI chipsets.
VESA Plug and Display is a video connector that carries digital signals for monitors, such as flat panel displays and video projectors, ratified by Video Electronics Standards Association (VESA) in 1997. Introduced around the same time as the competing connectors for the Digital Visual Interface and VESA's own Digital Flat Panel, it was marketed as a replacement for the VESA Enhanced Video Connector. Unlike DVI, it never achieved widespread implementation.
Serial Digital Video Out (SDVO) is a proprietary Intel technology introduced with their 9xx-series of motherboard chipsets.
The VESA Enhanced Video Connector (EVC) is a VESA standard that was intended to reduce the number of cables around a computer by incorporating video, audio, FireWire and USB into a single cable system, terminating in a 35-pin Molex MicroCross connector. The intent was to make the monitor the central point of connection. The EVC physical standard was ratified in November 1994, and the pinout and signaling standard followed one year later.
Mobile High-Definition Link (MHL) is an industry standard for a mobile audio/video interface that allows the connection of smartphones, tablets, and other portable consumer electronics devices to high-definition televisions (HDTVs), audio receivers, and projectors. The standard was designed to share existing mobile device connectors, such as Micro-USB, and avoid the need to add additional video connectors on devices with limited space for them.
Audio connectors and video connectors are electrical or optical connectors for carrying audio or video signals. Audio interfaces or video interfaces define physical parameters and interpretation of signals. For digital audio and digital video, this can be thought of as defining the physical layer, data link layer, and most or all of the application layer. For analog audio and analog video these functions are all represented in a single signal specification like NTSC or the direct speaker-driving signal of analog audio.
AMD Eyefinity is a brand name for AMD video card products that support multi-monitor setups by integrating multiple display controllers on one GPU. AMD Eyefinity was introduced with the Radeon HD 5000 Series "Evergreen" in September 2009 and has been available on APUs and professional-grade graphics cards branded AMD FirePro as well.