To improve the low sensitivity, in one embodiment the microlens array is designed to preferentially focus a larger percentage of the light into the PDLs than the PDSs.

• 为了改善感光度低的问题，在一实施例中，其微透镜阵列设计成能将较大比例之光线优先聚焦到光电二极体PDS以外的光电二极体PDL部位上。