To break the monopoly of foreign special LED light source technology research progress

Time:2018-08-02 Views:1231

Semiconductor lighting is characterized by high efficiency, energy saving, environmental protection and easy maintenance.China is a global producer, user and exporter of semiconductor lighting products.However, in the field of special LED light source, the market has been monopolized by foreign companies due to the high technical threshold.

Recently, the project of "super power high-density multi-spectrum special LED light source technology and application" jointly declared by xiong daxi, a researcher of suzhou health center of suzhou medical institute of Chinese academy of sciences, and suzhou ke shi kai semiconductor co., ltd. has won the first prize of technical invention prize of China optical engineering society.

The special LED light source is a kind of LED light source that seeks to emit more light energy in a small luminous area. The single mode group is required to have high power and power density, and its intensity is similar to that of laser.The technology started around 2000 and was slow to develop. Due to the lack of large-size vertical LED chips in China at that time, the special packaging technology, heat dissipation technology, optical design and integration technology were not up to standard.Abroad, only two high-tech start-ups, osram and America‘s laminus, can offer.

Since 2009, in order to break the monopoly of foreign manufacturers in the field of special LED light source, xiong daxi LED the team to focus on the research and development and industrialization of special LED light source, focus on the research and development, design and manufacturing technology of super power LED light source, and make a significant breakthrough.

With the efforts of researchers, the research team broke through various obstacles and eventually formed the technical route with independent intellectual property rights.

"To solve the problem that special LED light sources require larger luminescence surfaces based on vertical structure chips, we have developed the ‘quasi-single chip‘ packaging technology, which adopts special technology and USES the super-tight encapsulation of small size vertical structure chips into high-power modules," xiong said.

This technology can not only produce high light output on the same luminous surface, but also can flexibly use small chips to expand the luminous area, thus improving the total light output.

At the same time, the team also studied the substrate material of the high-heat-conducting vertical structure chip, the selection of high-heat-conducting solidification material, the thickness control of the solidification layer, the baking temperature and time control, and the design of the packaging substrate. Based on these technical combinations, the thermal resistance of the 600W module can be as low as 0.10K/W, at the leading level in the world.

Now, the team is also targeting the emerging direction of LED light health.At present, the research group has developed a number of infrared therapy devices based on infrared LED chips, including handheld and vertical devices and three horizontal ones that are being processed and adjusted.Special LED, with its unique advantages, is especially suitable for elderly people‘s health care and wearable light therapy equipment.