日本日立公司中心实验室研制了一种倒装的发光二极管显示器。由p—n结发出的光从衬底那面透射出来。 据称这种磷化镓发光二极管有一些优越性。磷化镓的折射率较大,为3.37。这就是说,光线射到一个表面上,和表面所成的角度大于17°部分产生全内反射。这样就使从“段”发出的光不会加宽、扩展。同时在极宽的 Japan’s Hitachi Center Laboratory developed a flip-chip LED display. The light emitted by the p-n junction is transmitted from the substrate side. Allegedly this gallium phosphide LED has some advantages. The refractive index of gallium phosphide is larger, 3.37. This means that light hitting a surface at angles greater than 17 ° to the surface produces total internal reflection. This will make the light emitted from the “segment” will not be widened and expanded. At the same time in a very wide