LED lighting products, healthy comfort evaluation method
2014/11/15
LED lighting is also being gradually get rid of doubts "Blu-ray hazard" open market scale lighting. People are being transferred from the LED lighting on the "security" of the question to "healthy, comfortable" concerns. What kind of lighting is healthy and comfortable? How to evaluate the health and comfort of the lighting issues are of concern.Caijian Qi talked about, with the continuous development of lighting technology, the human light quality requirements have been clear from the visual concept of vivid, security and development to the current health requirements. Because the human eye than any devices now are more complex, the use of optical photometry and colorimetry method for evaluating the quality of the reduction of the human eye can not guarding the View state. With the advances in technology, including photometry, colorimetry, optometry, ophthalmology development of modern medicine and biomedical science, a "visual human factors" to effectively evaluate the quality of light.
Visual human factors to improve product health properties as the goal, using human health due to the design, the use of a large sample of human factors testing data, objective quantification of the product on human performance, perceived impact, so as to effectively guide the development and improvement of products, and compared to traditional methods of health comfort evaluation Jieke effective quantified.
Caijian Qi believes that the light can be divided into the health effects of impact and influence on visual function of visual cognition. Total impact on the visual can include visual fatigue, eye function impact, impact on visual cognition is the impact on the brain.
Based on the Optometry and subjective cognitive evaluation, Mr. Cai Jianqi proposed short-term health effects of light on human evaluation index evaluation: MAR index. MAR index is divided into five levels, namely: 0-1 grade, the human eye will not have fatigue; there is a slight sense of fatigue 1-2 grade; there is a clear visual fatigue when 2-3.5 level, but also tolerable; 3.5-4-level visual fatigue when strengthened and accompanied by a series of symptoms; at 4-5, visual fatigue is very strong, should immediately stop their activities in the light environment. MAR index measuring the transfer function needs to be visual, gathered more than the human eye, the eye of many indicators and other data of the refractive state of the neural network by teenagers, and requires a large sample size can be achieved. Mr. Cai Jianqi introduced lighting products based on the evaluation of optometry process flow, as shown below. After preliminary studies and measurements of a large sample, Caijian Qi team has completed constructing visual color temperature and CRI evaluation model, strobe illumination threshold and so on.
