I don't understand the patent problem of PS2 handle vibration.

This brings up the issue of intellectual property. Intellectual property is registered by Immersion Company, which means that Immersion Company owns the patent of gamepad vibration. DualShock2 is the handle of PS2, but Sony didn't pay the copyright fee to Immersion Company, and then Immersion Company sued Sony for infringement, and then Sony attached 9 1 10,000 USD. Now Sony refuses to pay the "protection fee" of the other site, so it cuts off the vibration of the PS3 handle, saying that it will affect the accuracy of six-way sensing. Our mobile phone will vibrate, so we have to pay the patent fee to the company that gave this technology to the copyright owner. Now many people complain that the PS3 handle does not vibrate because the vibration function has long been accepted and praised by players. Without vibration, there is a feeling of being inseparable. Because there is no vibration, the handle of PS3 is no longer called "Dualschock 3". There is also little difference in appearance from DualSchock2.