Do LCD panel manufacturers all over the world have to pay patent fees to Sharp?

It is normal. Now every mobile phone is delivered to Qualcomm, Sharp has a production line, and Qualcomm basically has no production line. More than 95% of the annual profits are collected through patent authorization.

Even if gunpowder is patented, it has passed the protection period. A master can make a protective net. Although the core patent has expired, the peripheral patent can't be bypassed, and it has to be paid. Please refer to the 6C alliance and 3C alliance in the DVD case.