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<strong>Veritas</strong> <strong>et</strong> <strong>Visus</strong> <strong>Display</strong> <strong>Standard</strong> February 2009<br />
Interconnect Variations and <strong>Display</strong> Interfaces<br />
Fariborz Pourbigharaz, AMD, Camberley, England<br />
The presentation covered interconnect variations; standard display interfaces; bridges and hubs (bridging to/from<br />
DSI, h<strong>et</strong>erogeneous hubs, multimedia accelerators); and potential trends for future display interfaces. Pourbigharaz<br />
gave a flip phone example of<br />
interconnect variations where there are<br />
too many signals over flex – ~70 or<br />
more, involving cost and EMI/ESD<br />
considerations (see illustration on the<br />
left). He outlined the standard high-speed<br />
serial interfaces: DSI (MIPI) and MDDI<br />
(VESA) for handhelds; HDMI for<br />
consumer electronics; <strong>Display</strong>Port<br />
(VESA) for personal computers. He<br />
discussed mark<strong>et</strong> segments and overlaps,<br />
e.g. HDMI move from CE to handhelds.<br />
He then went into d<strong>et</strong>ail on MIPI display<br />
standards and bridging systems for<br />
instance enabling MDDI based platforms for DSI. There is multi-media acceleration with MIPI interfaces but there<br />
are fewer signals over flex (see illustration on right) for instance by offloading BB from MM tasks –<br />
imaging/video, graphics/display, and audio.<br />
<strong>Display</strong> Driver Opportunities<br />
Jussi Ropo, Nokia, Helsinki, Finland<br />
Ropo first outlined what had happened in Nokia in the last two years. OLED main (320x240) displays have been<br />
brought to mass mark<strong>et</strong>: Nokia 7900, Nokia 6600 Fold, Nokia 8800, and more will follow. Content adaptive<br />
brightness control has been brought to mark<strong>et</strong>. High speed serial interfaces have been adopted in >320x240<br />
resolution displays. So far only Nokia propri<strong>et</strong>ary Compact <strong>Display</strong> Port (CDP) interface has been used.<br />
Color depth mainstream in Nokia displays is now 24bit (16.7M colors). Some cost sensitive modules are still with<br />
16/18-bit colors. Composite video TV-out is widely available (N95, N96, E90, Nokia 6220, Nokia 7310). There is<br />
852x480 resolution continuation in Nokia Intern<strong>et</strong> Tabl<strong>et</strong>s: N770, N800, N810 (see photos).<br />
Basic business challenges remain. The mobile phone mark<strong>et</strong> is growing. Nokia’s volumes grew 21% Y/Y in<br />
Q2/2008, and the overall mark<strong>et</strong> grew 14.5%. Due to volumes, multi-sourcing has become more and more<br />
important. Nokia estimates total 2008 hands<strong>et</strong> mark<strong>et</strong> will be >1.2B units. Nokia alone shipped 122 million<br />
hands<strong>et</strong>s during Q2 2008. The need to co-operate with bigger companies is important in order to secure investment<br />
capability and delivery capacity. <strong>Standard</strong>ization is more important than ever in order to guarantee component<br />
interoperability and availability – MIPI for display drivers. Some of the previously exclusive features have become<br />
commodity (e.g. ambient light sensors) and there are lots of opportunities for new features. It’s som<strong>et</strong>imes hard to<br />
utilize propri<strong>et</strong>ary IP if developing companies are not willing to offer technology to others with reasonable terms,<br />
the presenter said.<br />
Co-operation b<strong>et</strong>ween chips<strong>et</strong> and driver suppliers is to be encouraged. MIPI standard interfaces make this easier<br />
with b<strong>et</strong>ter sample quality. The Nokia plan is to give more business opportunity to companies that are able to<br />
answer the call. For the best driver suppliers, there is more volume available. Due to increased value of the<br />
business, more investment is possible in new projects.<br />
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