Study of 50-M Solid-State Spot Light for High-Standard Stage Projection System(2/2)

With no doubt, LED or the other solid-state light sources have been extensively applied to general lighting or some special lighting applications. According to the essential principle, LED or LD is still limited by its relatively low optical (or flux density) so that such light sources cannot be applied to a long-distance projection lamp with high quality in optics and color performance. The most important representative example among them is the long-distance stage projection lamp. To conquer the barrier, we not only need to extend the optical exitance to a certain level, but also to take away heavy heat from the LED/LD die and the phosphor as well. Obviously, this is a remained problem in the worldwide solid-state light community. Therefore, here we propose a three-year project to develop a long-distance & high quality stage projection lamp. The study in the project is based on the systematic design, including the factors of calculation of etendue, LED die property, LED package, optimization of LD, increase of flux density, design of photon recycling, phosphor recipe, heat dissipation of phosphor and the whole system and optical design of the projection lamp. The result of the project will be the realization of the projection lamp rather than simulation or design. In the first year, we will make all the designs based on LED, and all simulation will be done. In the second year, we will optimize the design and fabricate the system and demonstrate the result. In the third year, we will redesign the system to fit the characteristic of the new light source, LD. In this year, to increase the heat dissipation capability for phosphor body is the most important top. Through the study in the coming three years along the project, we believe that the research accomplishment will be important and helpful in developing a long-distance & high quality projection lamp and will be appreciated by the international community of solid-state lighting.