Digital high definition HD display of people's demands for the rapid development of display technology, security monitoring common interface technology can not achieve 1080p HD display, using the appropriate interfaces compatible with existing systems, to achieve high-definition digital key. HD-SDI interface and projection DJ sets, in full compliance with the requirements of the development of digital high-definition, and with transmission distance, the interface is compatible with the standard can be based on, Plug and Play, and other advantages, can achieve a digital high definition. Intelligent LCD Video Wall is formed by combining a plurality of liquid crystal splicing unit from the projector DJ sets offer, due to differences between each liquid crystal cell, but also after prolonged use, a different display unit will show different colors. Therefore, to ensure color consistency of the display unit, brightness uniformity, degree of integration is very important patchwork edges, etc., we have been committed to the use of different techniques mosaic picture of integrity. For ease of operation and management system, into the more technically intelligent design. On the upstream LED epitaxial wafers, chip production, the United States, Japan, the European Union still has a huge technological advantage, and China Taiwan region, it has been an important global LED production base. The current global formation of the industrial structure in the United States, Asia, Europe dominated the three pillars of projection DJ sets, and showing in Japan, the US and Germany as industry leader, China Taiwan, South Korea, followed by China, Malaysia and other countries and actively follow up the echelon distribution area. Although China LED epitaxial wafers, chip production technology from the international advanced level there is a gap, but the huge domestic applications, LED downstream manufacturers to bring great opportunities for development, the domestic production of such display, landscape lighting and other LED application products have been exported to the United States, European Union and other countries and regions. At home and abroad casting, chip major research institutions Peking University, Tsinghua University, Nanchang University, Institute of Semiconductors, Physics, Power 13, South China Normal University, Beijing Industry University, Shenzhen University, Shandong University, Nanjing University, technically the main solution GaN epitaxial layer grown on a silicon substrate, GaN-based blue wavelength drift, improve internal quantum efficiency and light extraction efficiency, increase capacity and anti-light decay heat power chip level and so on.