Led Civil Aircraft Instrument Panel Lighting Applications

This research is about the LED application of instrument panel lighting in commercial aircrafts. Recently, China has been trying to develop commercial aircraft industiy. However, research on the cockpit lighting remains to be enhanced of commercial aircraft. Many topics on the LED application are still worth researching, including the practicality and the choice of lighting parameters, etc. All of them make the research meaningful and necessary. The thesis is to research on these topics by document research, ergonomic experiments and fixture designing.The thesis collects and classifies existing standards of cockpit lighting. Considering the key parameters of instrument panel lighting include illuminance, luminance, CCT and so on, the thesis picks up advanced standards that are relevant with these parameters. Recommendation for these lighting parameters is obtained by analyzing these standards. It is the basis for subsequent ergonomic research and optical design.After document research, the thesis brings in ergonomic experiments of visual preference and performance. The preference experiment is taken in analogous cockpit environment. The subjects are required to evaluate lighting effects under different CCTs, both in daytime and nighttime. The result shows that people prefer high CCT close to sunlight in daytime, while 3000K at night. Visual performance experiment is taken with realistic instrument panel and the surrounding is also similar with the cockpit. The variables includes luminance which can be adjusted to 2,4,8,16cd/m2 and CCT to 2000K,3000K,4000K,5800K. The result shows that visual performance is better with 8cd/m2,3000K or 8cd/m2,5800K. Taking both experiment results into account, the thesis recommends instrument panel lighting of 8cd/m2,3000K.At last, the thesis offers an optical design proposal of instrument panel flood lighting. The aiming features come from the results of document research and ergonomic experiments. By secondary optical design on the high-power SMD-packaging LED, we control the light distribution of the fixture, resulting in good illuminance uniformity on the panel. The performance of the sample is tested, which meets the requirements of instrument panel lighting.There are several points of innovation in this research. First, enhancement in research of cockpit lighting is quite necessary for the commercial aircraft industry. Second, relevant fixtures in the market lack theoretical supports about lighting parameters. This thesis provides some from various kinds of research. Third, a creative solution of good performance is presented for panel lighting with high-power LEDs.