According to Info Trends/CAP Ventures, the statistics indicated the global digital signage market scale will reach US$3.4 billion in 2009. Also iSuppli forecasted the digital signage products will create US$2.8 billion of sales in chain stores in the United States. With the great profit brought by digital signage industry, more advertising spending is converted from traditional TV or newspaper to the digital signage. The expanding market triggers the development of large-size and outdoor digital signage products...