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Optoelectronics/Displays??

Timing controller eliminates external regulator

Posted: 10 Aug 2010 ?? ?Print Version ?Bookmark and Share

Keywords:video. controller? DisplayPort?

Parade Technologies introduced their DP616 video display timing controller (TCON) device, which the maker claims is the first eDP TCON to meet VESA eDP v1.2 and to integrate an on-board switching regulator. This eliminates the need for an external regulator, thereby reducing the total system BOM as well as the system's power requirements.

The DP616 was created specifically to promote DisplayPort adoption by system OEMs. Parade Technologies' VP of Marketing, Jimmy Chiu says, "Our first-generation eDP T-CON was very successful. Its widespread adoption enabled Parade to accumulate valuable OEM feedback to develop our second-generation device, which emphasizes total system cost reduction and power efficiency." He further discloses, "As a key contributor to the DisplayPort effort, Parade was ready with our v1.2 device as soon as the new eDP spec was finalized."

The DP616 is an eDP sink device that receives video input from a CPU or GPU and translates it into mini-LVDS row and column video data for use by a display panel. The Video Electronics Standards Association (VESA) has just announced the version 1.2 upgrade of its embedded DisplayPort (eDP) specifications in July 2010. The DP616 is a one-lane main link T-CON that supports eDP link rates up to 2.7 Gbit/s. the device supports all panel resolutions up to WSXGA+ (1680 x 1050) with 18-bit color depth, and WXGA+ (1440 x 900) with 24-bit color depth.

To significantly reduce the total system power requirements, the DP616 utilizes an internal switching regulator. By eliminating the need for an external linear regulator (used in almost all panel designs to step down standard eDP supply voltage from 0.3 to 1.2V) the device decreases both the bill-of-materials (BOM) cost and total system power requirements. The vendor estimated that eliminating a discrete linear regulator from a panel design will reduce system power consumption by as much as 175mW. The DP616 also uses crystal-free technology, an integrated color engine, and supports the new dynamic backlight control capabilities.

VESA's eDP standard is replacing LVDS as the common standard for linking CPUs and graphic controllers with displays in mobile computers. The new v1.2 specification now supports higher data rates and other new capabilities that further reduce the number of connecting wires required over the link.

Notebook computer designs are switching to eDP because it requires less pins than LVDS, and because it employs low-voltage AC-coupled technology, that is compatible with sub?m fabrication. eDP also allows OEMs to design computer systems that use a common interface specification, DisplayPort, for both external and internal display panels.

DP616 samples are available now, and production volumes will be ready in Q4 2010. The price of each DP616 is $1.45 in high volume orders.





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