Key patents of mobile phone battery and notebook lithium battery
Although most lithium batteries in the world are made in China, since Sony successfully developed lithium battery technology in 1992,
After putting it into practice, the key patents of lithium batteries have been in the hands of Japanese companies such as Sony.
Miniature multilayer ceramic capacitors necessary for smart phones and tablet computers
There may even be more than 500 passive components produced by Japanese companies in a smart phone.
The patented technology of thin film liquid crystal is almost entirely in the hands of Japanese companies represented by Sharp.
No matter how many LCD monitors are produced by domestic enterprises and how much market share they occupy,
The related patent licensing fees will not be less.
Japanese companies such as Toshiba and Hitachi applied for almost all key patents after completing the development of NAND flash memory chips.
Although through patent exchange, Samsung, Hyundai, Intel and other flash memory giants have related patents,
But in fact, the key technology of NAND flash memory chips is still in the hands of Japanese companies.
Even the display screen of IPhone5 based on thin-film liquid crystal technology, the built-in storage space that cannot be expanded through flash memory chips, batteries, cameras, miniature multilayer ceramic capacitors and miniature patch vibration motors ... these accessories,
Either the patent originated from Japanese enterprises or it was produced by Japanese enterprises.