First, it is also the country that invented LED technology, mainly Europe, America and Japan. They are leaders in LED technology, especially in the field of white light technology. Many manufacturers in Japan, Germany and the United States have many patented technologies. At present, it is also home to the best LED chip technology manufacturers, such as Niya in Japan, Toyota Synthetic, Toshiba, Kerui and General Motors in the United States. Europe's Philips, Osram, etc.
Second, only the manufacturers in Taiwan Province Province and South Korea mentioned by you, although their technology is worse than that in Europe and America, are also high-yield countries of LED chips at present, especially in Taiwan Province Province, and the market share of chips produced each year is quite high. At present, the main manufacturers are Asahi Shimbun, Jingyuan and Yiguang.
Third, in Chinese mainland, the main manufacturers are concentrated in Shenzhen and Shanghai. At present, domestic chips are being adopted by a large number of manufacturers because of their high cost performance. At present, the main domestic manufacturers are: Fangda Keke, etc.
Judging from the usage of light bulbs that should be used in the market at present, there are two kinds of plug-ins and patches: the plug-ins are mainly F3, F5 and other models, and there should be many in the market at present. The patches are mainly: 3528, 5050, 30 14, 1W high-power light bulbs, and some synthetic chip light bulbs. There are many different models and so on that should be suitable for different finished products.
I hope the above introduction will help you, and we can communicate more together when we have the opportunity.