In recent years, large-scale LCD flat-panel display technology has officially arrived and developed rapidly. In the field of control rooms, many users have also shifted from using video walls to using flat-panel displays. However, the rise of LCD does not mean the end of head-to-wall DLP, because in 7×24 applications, compared with other technologies, rear-projection cabinets are more cost-effective than other technologies, especially after the widespread adoption of LED light sources.