Display Standard - Veritas et Visus

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Veritas et Visus Display Standard February 2009 to larger gen fabs already. There are power-saving solutions: content-based BL control; sensor-based brightness control; sub-pixel rendering; OLEDs; and reflective display technologies. Turning to the
Veritas et Visus Display Standard February 2009 Interconnect Variations and Display Interfaces Fariborz Pourbigharaz, AMD, Camberley, England The presentation covered interconnect variations; standard display interfaces; bridges and hubs (bridging to/from DSI, heterogeneous hubs, multimedia accelerators); and potential trends for future display interfaces. Pourbigharaz gave a flip phone example of interconnect variations where there are too many signals over flex – ~70 or more, involving cost and EMI/ESD considerations (see illustration on the left). He outlined the standard high-speed serial interfaces: DSI (MIPI) and MDDI (VESA) for handhelds; HDMI for consumer electronics; DisplayPort (VESA) for personal computers. He discussed market segments and overlaps, e.g. HDMI move from CE to handhelds. He then went into detail on MIPI display standards and bridging systems for instance enabling MDDI based platforms for DSI. There is multi-media acceleration with MIPI interfaces but there are fewer signals over flex (see illustration on right) for instance by offloading BB from MM tasks – imaging/video, graphics/display, and audio. Display Driver Opportunities Jussi Ropo, Nokia, Helsinki, Finland Ropo first outlined what had happened in Nokia in the last two years. OLED main (320x240) displays have been brought to mass market: Nokia 7900, Nokia 6600 Fold, Nokia 8800, and more will follow. Content adaptive brightness control has been brought to market. High speed serial interfaces have been adopted in >320x240 resolution displays. So far only Nokia proprietary Compact Display Port (CDP) interface has been used. Color depth mainstream in Nokia displays is now 24bit (16.7M colors). Some cost sensitive modules are still with 16/18-bit colors. Composite video TV-out is widely available (N95, N96, E90, Nokia 6220, Nokia 7310). There is 852x480 resolution continuation in Nokia Internet Tablets: N770, N800, N810 (see photos). Basic business challenges remain. The mobile phone market is growing. Nokia’s volumes grew 21% Y/Y in Q2/2008, and the overall market grew 14.5%. Due to volumes, multi-sourcing has become more and more important. Nokia estimates total 2008 handset market will be >1.2B units. Nokia alone shipped 122 million handsets during Q2 2008. The need to co-operate with bigger companies is important in order to secure investment capability and delivery capacity. Standardization is more important than ever in order to guarantee component interoperability and availability – MIPI for display drivers. Some of the previously exclusive features have become commodity (e.g. ambient light sensors) and there are lots of opportunities for new features. It’s sometimes hard to utilize proprietary IP if developing companies are not willing to offer technology to others with reasonable terms, the presenter said. Co-operation between chipset and driver suppliers is to be encouraged. MIPI standard interfaces make this easier with better sample quality. The Nokia plan is to give more business opportunity to companies that are able to answer the call. For the best driver suppliers, there is more volume available. Due to increased value of the business, more investment is possible in new projects. 37
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Display Standard - Veritas et Visus

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