COG (Chip On Glass) is a new technology,which put lcd driver on lcd,decreased the line and liners on PCB,reduced the size and complexity of the circuit board,reduced the IC package of the SMD. The whole process reduced the system cost. This will be a new trend in the market. In a simply word, if the the problem is from IC but the LCD is good, lcd will be reused. 
 
This COG Laminator is a pre-press IC machine, ie, the process happens before actural IC bonding. This is to position IC on ACF after ACF already put on IC bonding area, please your kind understanding.