The goal of the China Academy of Space Technology is to use mass-produced “electromagnetic propulsion systems” in satellite projects as soon as possible. At present, the technology is in the late stage of the demonstration. “Chinese scientists are trying to improve the prototype to reduce power loss. They also have to find ways to cram’ this type of engine into the satellite and find suitable materials for engine development.” U.S. military expert Gadi said that China and the United States are engaged in a research and development competition around the “electromagnetic propulsion system”. The military potential of this technology is huge. If China can install the “electromagnetic propulsion system” on military satellites, it will be able to carry out faster orbit changes. In maneuvering flight, the PLA controls the altitude of satellites more conveniently.
In actual combat, Chinese satellites equipped with laser pointer weapons or interceptor bombs can rely on the “electromagnetic propulsion system” to intercept enemy satellites in different orbits at high speed. In addition, because the “electromagnetic propulsion system” does not eject any material, the Chinese satellites or spacecraft using this technology are more stealthy, and the US Air Force’s reconnaissance system is difficult to detect or lock them into passiveness. After the “electromagnetic propulsion system” is mass-produced, it can also reduce the use cost of military satellites. Since then, there is no need to carry expensive and limited traditional fuel to implement orbit changes, and the service life of military satellites equipped with the “electromagnetic propulsion system” is relatively longer.
The laser phosphor display technology uses a monochromatic laser (ie blue laser) combined with a multi-color rotating phosphor pink wheel technology containing red and green phosphors to produce the three primary colors of red, blue and green. The laser phosphor light source technology has overcome the most fundamental technical difficulties of laser display in terms of efficiency and reliability. The application of laser phosphor display technology solves the problems of laser display in cost, environmental protection and user experience. However, phosphor laser projectors can only be realized with a single-chip DLP due to the nature of the light source, and cannot be applied to the large-screen market due to the single-chip nature. At the same time, there is still a certain lack of color accuracy.
Compared with traditional projection bulbs, the laser + LED hybrid light source technology has one of its biggest advantages is its long life. The use of a new hybrid light source combining laser and LED can make the life of the projector light source up to 30,000 hours, reducing maintenance costs and operating costs. And the brightness attenuation is not obvious for a long time. At present, this combination situation is rarely used in the market, because the brightness of the LED light source is limited, and this scheme is more complicated, and its future development prospects are not very clear.
Judging from the current situation, the three laser display technologies of tri-color green laser pointer, phosphor + blue light, and LED + laser will coexist for a period of time. From the perspective of technological development, tri-color lasers will eventually dominate the entire projection market. However, at the level of application of laser display technology, Chinese companies have already taken the lead in the world. As the fourth-generation display technology, laser display has gradually led the development of global display technology. In the future, laser display will be ubiquitous.