In the first half year of 2022, the Chinese smart phone market sold around 140 million units, 14.4% year-on-year decline. Against the backdrop of declining sales in the smart phone market, foldable-screen phones are the opposite, with demand for some products outstripping supply.

In today's world, micro projectors have become very popular in the consumer market, with output brightness ranging from tens to about 1000 lumens. Generally，projector use LED with copper substrates as the light source for the lighting system to project the image.

With the continuous development of technology, the performance of tablet computers has become increasingly powerful. For the convenience of carrying and using, tablet computers are becoming thinner and thinner, so the internal space of the tablet computer is extremely small, and heat is easily accumulated on the heat source chip and battery, which

There are three types of traditional heaters: small sun heater, oil filled radiator, and baseboard. They mainly use quartz tubes to heat up, heat transfer oil to heat up and dissipate heat, and electric heating film to heat up. The effects are not ideal.

With the continuous development of electric vehicles. Charging piles are being built more and more. The speed of charging can be faster and faster. The heat dissipation scheme of the charging pile should be done well, which is extremely critical. It will not only affect the working stability of the charging pile, but also affect the service life of the charging pile.