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研究高阻恒流源驱动的ＬＥＤ所发射光场的粒子数噪声压缩与ＬＥＤ电、光量子效率，漏电流效应，光子流涨落负反馈及噪声频率的关系。指出：在高阻恒流ＬＥＤ中引入适量光子流涨落负反馈能产生粒子数压缩态光场并极大地提高粒子数噪声压缩，其理想压缩仅受限于高阻恒流源残余噪声、ＬＥＤ漏电流效应和量子效率。
The relationship between particle number noise reduction and LED power, photon quantum efficiency, leakage current effect, photon current fluctuation negative feedback and noise frequency of light field emitted by LED with high resistance and constant current source is studied. It is pointed out that introducing a proper amount of photon-flow fluctuation negative feedback into a high-resistance constant-current LED can produce a squeezed state light field and greatly increase the number-of-particles noise compression. The ideal compression is limited only by the residual noise of the high-resistance constant current source. Leakage current effect and quantum efficiency.