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Study on the effect of color of light source

by Piper Alice

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With the size and quantity of the tunnel construction is increasing, the operation of the tunnel lighting facilities and maintenance costs are also higher and higher, the contradiction between energy saving and traffic safety is becoming more and more prominent. In order to solve the problem of lighting energy saving and traffic safety, we must study the new theory and technology of tunnel lighting.
In the course of driving at night, the reaction time has important practical significance for the protection of road traffic safety. In the course of driving, the response time is fast, which means that the visual efficiency and traffic accidents are reduced. The relationship between the number of traffic accidents and the response time of the Japanese survey data shows that the number of accidents is proportional to the length of the reaction time, see table 1.
Therefore, in order to ensure the traffic safety, the driver found that the length of the reaction time of the obstacle on the road ahead is very important. As can be seen from the relationship between reaction time and traffic accident, will "reaction time" as the evaluation of tunnel lighting color of light source and light effects of parameters is very important and necessary.
Tunnel lighting design standards, do not consider the spectral distribution of the light source, the color is also affected. In addition, in the actual tunnel lighting conditions will happen to observe dark targets on a bright background, the negative contrast of human eye is more advantageous to observe target. While the current tunnel lighting research is the use of positive contrast, it is necessary to carry out the tunnel under negative contrast conditions, so that the proposed tunnel lighting design standards more in line with the actual situation of driving. When the target luminance, luminance contrast and the same angle, visual effect is good or bad is sleeping hole size is determined by: if the composition of the blue and green light in the radiation spectrum of light source, it will make the eye sleep pore shrinkage is much, depending on the target was clear, hazy feeling less, visibility is good; on the contrary, the visibility is poor. In order to correctly evaluate the light radiation effect of spectrum in the blue and green light component of visual effects, in photopic vision, the sleep hole brightness to evaluate; because the average brightness of the tunnel segments is generally less than 4cd/nf, belonging to the category of mesopic vision lighting conditions, determine the optimum reaction time expression is worthy of further study. This can change the current tunnel lighting evaluation index does not consider the effect of color of light source on the visual, and according to people in the eyes of the photoreceptor cell spectral response characteristics, to research and examine the current tunnel lighting in the evaluation index system of the rationality.

 





The application of LED in daily life

by Piper Alice

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Through the diffusion process, in the pure semiconductor doped with a small amount of suitable impurities, can be obtained from impurities in semiconductors. The incorporation of pentavalent element is N type semiconductor, doped with trivalent element is P type semiconductor. LED is an abbreviation of LightEmittingDiode (light emitting diode), and it is a solid semiconductor device. In the P type semiconductor, hole (positive) called the dominant majority carrier, electronic (negatively charged) called minority carrier. In the N type semiconductors, electrons (negatively charged) is dominated by the majority carrier hole, (positive) is the minority carrier. After power, in p-type semiconductor and the n-type semiconductor interface will appear a with special electrical properties of thin layer, that is often said that the PN junction PNJunctionTransistors. PN junction on the p-type semiconductor and the n-type semiconductor majority carrier diffusion resistance, when the PN junction forward voltage is applied, current from the LED anode to cathode, and in PN junction in minority and majority carrier were composite, the excess energy will be transformed into light and is released, semiconductor crystal issued from the ultraviolet to the infrared different colors of light, the light and the strength of the current. Such as small current when the LED is red, with the increase of the current can be changed into orange, yellow, and finally green. Through the study of luminescent materials, people gradually developed various LED elements, color light efficiency is more and more high.





Lighting design of Ningxia Oriental Tantalum Industry

by Piper Alice

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Music, sculpture, calligraphy, life everywhere is full of art, enjoy the work of art, can let people's physical and mental pleasure. ICC far from the design director Zhou Yuanpeng in the design of Ningxia Oriental Tantalum Industry Club and the model, combined with contemporary art form, through the smooth lines, exquisite design, the art of leisure mood into life, so that people have a special art space.
Oriental Tantalum Industry Club space to warm yellow color, with black and white two colors, elegant and warm. Strange crystal chandeliers suspended in mid air, light pours, real estate model as if covered with a layer of silver yarn. Blue range of radiation circle clever constitute the partition wall, hollow walls, artist's statue striking placed on it, in obscure corner, violin slowly played out and the beauty of the music.
Thick bars of the construction of the space, special bottled table leg and matching, white lamp placed in table exudes gentle light, no rules of carpet, flow like water flowing, to study increased somewhat free breath. Delicate plastic ring tire decoration, arranged in neat rows of books, stand a angle steel sculpture electric guitar, full of artistic atmosphere of study, unconsciously drunk during.
Large angle of view of the window, so that the natural flow of light into the interior, and the integration of light, so that the room open and bright. Bedroom decorated with elegant white gives priority to tone, light dark streaks of floral walls, floral carpet and bedding collocation, to create a warm sweet atmosphere. Exquisite Violin and music stand each corner of a house, the ear heard flying music, and instantly.






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