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Why does DisplayPort exist?

post #1 of 5
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I am just curious as to why DisplayPort is used. As far as i'm concerned, HDMI/DVI are fine, and are supported widely by many devices. Are there any advantages in using DisplayPort?
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post #2 of 5
It has higher bandwidth and therefore can carry larger resolution and refresh rates.
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post #3 of 5
Well, HDMI was only created as a form of video DRM. Read up on that, kinda interesting.

to quote the most of it
Quote:
DisplayPort version 1.2 can support video resolutions of up to 3840 x 2160 pixels (4K) at a refresh rate of 60Hz, and it supports all common 3D video formats. In terms of bandwidth, it can manage 17.28Gbps. Version 1.3, when it arrives, will support up to 8192 x 4320 (8K) resolution, or two simultaneous 4K streams. It will also double bandwidth to 32.4Gbps.
The downside of DisplayPort at the moment is that it doesn't support ethernet data, and the standard doesn't have an audio return channel. However, it is capable of multiple video outputs which means more than one display. See also: How to connect two displays to a laptop with one DisplayPort connector.
Meanwhile, HDMI version 1.4 is the most common at the moment. This supports the same 4K resolution as DisplayPort 1.2, but at just 30Hz (or 4096 x 2160 at 24Hz). HDMI 2.0 is newer on the scene in a few devices such as this Sony TV. This doubles the refresh rate to 60 Hz as well as increases bandwidth from 10.2- to 18Gbps.
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post #4 of 5
Also: DP is free VESA standard, when implementing HDMI you need to pay fee:
"VESA, which created the DisplayPort standard, states the standard is royalty free to implement."
"HDMI manufacturers pay an annual fee of US$10,000 plus a royalty rate of $0.15 per unit, reduced to $0.05 if the HDMI logo is used, and further reduced to $0.04 if HDCP is also implemented. An alternative fee for HDMI manufacturers making fewer than 10,000 units per year is an annual fee of $5,000 with a royalty rate of $1 per unit."
post #5 of 5
Quote:
Originally Posted by Galicjanin View Post

Also: DP is free VESA standard, when implementing HDMI you need to pay fee:
"VESA, which created the DisplayPort standard, states the standard is royalty free to implement."
"HDMI manufacturers pay an annual fee of US$10,000 plus a royalty rate of $0.15 per unit, reduced to $0.05 if the HDMI logo is used, and further reduced to $0.04 if HDCP is also implemented. An alternative fee for HDMI manufacturers making fewer than 10,000 units per year is an annual fee of $5,000 with a royalty rate of $1 per unit."

Indeed, and when considering the fact that DisplayPort is updated more often than HDMI and currently has significantly higher bandwidth, the better question would have been, "Why is HDMI still being used?" HDMI 2.1 is far better than DisplayPort 1.4 though, although I suspect DisplayPort 1.5 will top that.
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