LCOS projector is a new reflective microLCD projection technology. Compared with penetrating LCD and DLP, LCOS has the characteristics of high light efficiency, small volume, high opening rate and mature manufacturing technology. It can easily achieve high resolution and full color performance. Since LCOS is generally 0.7 inches in size, the size of related optical instruments is also greatly reduced, resulting in a significant reduction in the total cost of LCOS-PTV. The design returns to the source, mainly highlighting the performance of LCOS, and the hidden heat dissipation design makes it look more pure.