What kind of light energy to improve people's awareness? - China lighting network

Under different light environment, our energy level, mood, alertness performance are also different, in addition to their individual differences, intensity of illumination as one of the most important optical parameter has important influence. Daily work, as the work time or work tasks, we can feel mental fatigue, blurred vision, the mood can make people more and more tired, inattention, psychological pressure increases gradually, the negative influence on job performance. Depression may also affect other work time, rest time, the body rhythms can cause adverse effect. If we just in a soft warm color or gloomy light environment, work, and tiredness may come faster. Indoor lighting will be through the emotional impact on people's cognitive performance, so how light can raise people's awareness. The human eye can see is a complex physiological process, specific forming process including visual light to cornea, pupil, lens, Refraction of light) - > vitreous ( Fixed eye) - > retina, Form the image) To the optic nerve, Conduct visual information) - > brain's visual centers ( Form the visual) 。 Photoreceptor according to its shape can be divided into two categories, namely the rods and cones, under different light intensity, these two kinds of different cell function. In environmental brightness level is greater than 3 CD/m2

when mainly cones, with brightness level less than 0. 00 when LCD/m2 mainly rod cells to produce visual effect. In 2002, the United States professor Berson etc. Through the experiment discovered the mammalian retina does exist the third type of photoreceptor cells - — Specialized retina photosensitive ganglion cells. Light after entering the human eye is this type of photoreceptor cells produce biological effects of light, after receiving from this sense, the intensity of light can directly and indirectly affect the circadian clock, wake instantaneous changes directly affect both physical, indirect effect is refers to the rhythm of cyclical changes. 卡琳·C。 H。 J。

Smolders about brightness and psychological fatigue experiment, points out that as a lighting source, high light intensity can result in better mental performance, compared with low illumination conditions, a higher alertness. Asked participants in two kinds of experiment conditions 1, fatigue condition 2, general control condition to study the in two kinds of illumination intensity under the condition of 200 lx and 1000 lx subjects at the same time to laboratory, four times in the morning ( 900am ， 1020am or 1145am ) , or in the afternoon, 1315pm ， 1445pm

or 1615pm ) 。 Each group of experimental seven minutes of setup time ( baseline phase) , and 29 minutes of mental fatigue or time control ( mental fatigue vs. 控制

操作) , intensity of illumination in the working face of 200 lx and 1000 lx, color temperature 4000 k, then exposed to experiment that the light environment for 30 minutes. The results showed that under the precondition of subjects of different mental state, high intensity of illumination lighting conditions on the subjects of subjective and objective alertness, judgment, and have affected degree of awakening. Under the fatigue state of mind, The fatigue condition) Bright lighting environment can reduce people's feeling sleepy and self-discipline, improve people's behavior increase alertness and energy, which will exert positive effects on task performance, can also weaken the subjective fatigue due to lack of sleep. Lighting parameters optimization is beneficial to the improvement of cognitive and improve a more pleasant light environment. Figure 200 lx illumination conditions, tired out with experiment, the degree of figure 1000 lx illumination conditions, tired out with experiment, the degree of figure 200 lx illumination conditions, with the figure 1000 lx experiment energy level illumination conditions, vibrant with experiment, the article points out that if the high intensity of illumination for the feelings of people, performance, physiological effects depends on the mental state, before the light intensity in tired of working state of subjects has more significant and timely effect, instead of for the rest of participants is slow and is not obvious. Experiments provide light environment are artificial light, and components without the sun, and only two kinds of illumination setting conditions, the sun contains a very broad scope of illumination conditions, corresponding to a more complex awareness performance range. Conclusion to the spirit of the original work performance status, and lighting levels, as well as the interaction between heart rate changes and other factors, in addition to the potential effect of light intensity for alertness and excited, and also consider the subjects of the light environment evaluation, and individual character of measured environment space for familiarity, etc. , lighting conditions and has certain function relation between their mood changes. What is certain is that within the scope of a certain intensity of illumination, bright light environment can enhance people's awareness, reduce the work task or a lack of sleep causes tiredness. Coordinating editor YingZi

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