Muqing Liu

Title: Muqing Liu: LED Light Measurement Innovations.

Introduction

Muqing Liu is an inventor based in Shanghai, China, whose patent work focuses on measuring the total luminous flux of light-emitting diodes (LEDs). His listed portfolio includes 2 patents, and he is associated with Fudan University.

Latest Patents

Liu’s patent, “Method Using Concentrator for Measuring Luminous Flux of LED,” describes using a reflecting cup to collect and direct an LED’s emitted light toward a photometer. The LED is driven by a constant-current power supply, and the measured signal is adjusted using a calibration coefficient to determine total luminous flux. The patent presents the method as simple and accurate.

His other listed patent, “Equipment and Method for LED’s Total Luminous Flux Measurement with a Narrow Beam Standard Light Source,” describes a system using an integrating sphere, a narrow-aperture fiber, a spectrometer, and a light-source driver. The spectrometer measures the LED’s spectral distribution and supports calculation of its total luminous flux. The described equipment aims to provide accurate measurements with low error and cost.

Career Highlights

Liu’s listed inventions address practical approaches to LED photometry, including light collection, spectral measurement, and calibration. Both patents focus on improving the measurement of total luminous flux.

Collaborations

Liu is associated with Fudan University. His listed coworkers include Xiaoli Zhou and Chuan Yuan.

Conclusion

Muqing Liu’s patent work at Fudan University centers on methods and equipment for measuring LED luminous flux, with an emphasis on accuracy and practical implementation.