The sector standard lags behind The semi-conductive illumination is developed and obstructed seriously
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The illumination is the comprehensive engineering related to many kinds of discipline and many kinds of technical fields. Visual characteristic and the intersection of vision and to quantity and pursuit of quality that light cognitive decision of people, not only should consider the development of one’s own technical field, also consider and pay close attention to the fact synthetically ambits such as aesthetics, philosophy, human ergonomics, physiology and psychology,etc. meet demands of customer finally.
People’s expectancy is much faster that semi-conductive lighting engineering compares with development of the industry, some optical characteristic of LED is that any artificial source was incomparable in the past, such as color is abundant, chroma is high, the colour gamut is broad, the light beam is centralized, the speed of response is quick, luminance and color are very intelligent and networked controlled and regulated etc.. The application of these new special domestic animals will change experience and habit that people’s tradition will be lighted, initiate the changes of lighting idea and mere culture, promote the lighting products to develop towards human-oriented and more humanized direction, meet demands of people’s physiology and psychological health in right time.
The illumination needs to give consideration to physiology and psychological impact
The purpose that was lighted in the past is to meet people to the photic demand in the darkness, it was the sign that the mankind enters modern civilization that Edison invented the commercial incandescent lamp in 1879. The illumination is to satisfy people to see object and scenery at first, secondly is for the demand different homework, there are different luminance and illumination intensity requirement on light source, but on the whole the illumination is an electric part of building.
LED light source is a modern sign that is lighted, should study LED lighting impact on people’s physiology and psychology of different chroma of light sum, study optical characteristic and the people’s physiological optics effect and psychology optical effect cooperativity of LED, especially people’s physiological rhythm (biological clock) And the endocrine system is by illumination control to a great extent. Study what LED colorama lighting can stimulate or inhibit the alcoholic secretion of cortex, cortisol will make people excite, increase vigor, what the intersection of LED and colorama lighting will stimulate or inhibit the secretion of melatonin from, melatonin will make people sleepy, drowsy. So the modern purpose to light has change of the quality, should meet different crowds’ visual physiology and psychological health, safe and easy need, regulate the needing of the psychological mood and temperament and interest, regulate the needs of physiological rhythm and endocrine system.
It is the task of top priority to make the standard
Will compete with existing light source, LED needs to meet the requirement for the following several respect: A lamp needs above 1000lm to be used for lighting, the cost of luminous flux of 1000lm should be in under 2 dollars, each watts of luminescent efficiency should be in above 100lm, the room lighting of the colour rendering index should be greater than 85, exterior illumination should be greater than 70. Cree has already developed the warm white, high colour rendering LED which has used the red, yellow phosphor powder recently, 1mm
2 chips, colour temperature 2780K, colour rendering index Ra =92.8,Luminescent efficiency 113lm/W.
LED is a semiconductor device, the parameters of its light, electricity, color change with device temperature and ambient temperature, heat radiation and stability remain to improve. LED light source does not have definite optical axis and light distribusion curve, it is not the rigorous pointolite, the square of luminous intensity and distance become reciprocity law is not applicable, optical parameters are different on different angles, that is to say different height should use different light distribution.
The sector standard lags behind, has hampered trade’s progress seriously, it is the task of top priority to discuss and make the standard as soon as possible. IEC (International Electrotechnical Commission) Organizing discussing and making the standard of LED lighting products, we should participate in actively. Concept, colour rendering and exponential concept of developing the color of the existing colour temperature are not very applicable to LED, we are promoting CIE (International Commission on Illumination) Study and revise the international standard.
LED is used for lighting within sightly, we can’t cling to old practices and refuse to accept new things, follow blindly according to traditional idea and the forefathers’ collective of old road, and the optical characteristic that should give full play to LED creates the modern lighting products, break through traditional idea, develop, suit the intersection of people and physiology and the intersection of psychology and need, safe healthy the intersection of lighting and products, promote the change of the lighting theory, promote the development of lighting industry.
Developing the lighting industry should break through the traditional idea
While it is lighted that industry marches toward the illumination modernly, several traditional ideas need breaking through.
1.The concept that break through the traditional bulb and the lamps and lanterns relying mainly on bulb light, develop the area light source.
The light source of white heat has already been employed for more than 100 years, become people’s traditional habit, the but the bulb one is shiny more centralized, too bright will produce the blinding feeling, the light is not soft, the lighting working face is heterogeneous, design and overcome the above-mentioned shortcomings by special light distribution. LED light source can be made into the two-dimensional area light source, makes into the luminescence panel in form of the backlight source. The size may be large or small depending upon need, the luminance, colour temperature and colour rendering adjustable, can avoid the blinding senses of the traditional lamps and lanterns, the light is softer and even and comfortabler.
2.Break through, model the intersection of the sun and photic concept, develop digitization, can mix colors photic association lighting system.
Whether the artificial source must imitate only a question that is worth canvassing of the sun, there is no sunshine at night, the illumination can choose different light sources according to different people’s demand. Typical light source should whether the intersection of RGB and trichromatism make up, can mix colors gentle light source lighting system of colour rendering, can regulate luminance and chroma freely according to the needs of different crowds. Shade can regulate people’s mental state and mood, slow down the pressure, arouse the temperament and interest, dispel fatigue, promote the health. Can treat SAD (season disposition thread and lack proper care effectively with LED shade) Disease; The purple light, skin of blue light-struck can promote the production of vitamin A, D, and then promote the absorption of calcium, blue light can go Emberiza aureola Pallas.; Indian physician D.P.Chadiali treats the person’s allergic response by 12 kinds of color light-struck, immune system is disorderly, cardiovascular ill, nervous, depression and insomnia,etc.. So the modern illumination is that digitized shade that can be adjusted and controlled according to the needs of physiology and psychology of different people makes the lighting system up.
3.Break through the concept of the traditional street lamp, develop the humanized LED street lamp lighting system.
The pole height of street lamp light of the general urban through streets and arterial roads is 12-15 meters, in fact the street lamp light pole highly has a warm sense of pressing close to people even more a little more low. It is made into the shapes of the sodium lamp lamps and lanterns, can make into the light distribution which disperses the light source and set up that LED street lamp is unnecessary, the height lamp holder is made into the linear light source, it is done into a columnar light source that the light pole can be fully utilized. The requirement because of city afforestation, have not enabled light effectively on the tree in the illumination of a lot of street lamps, contribute to the losses that greatly. Can erect the street lamp in the middle of the road in the branches, man car mix the road, hang along the central line of road, utilize light energy evenly effectively, the bilateral light pole is made into the columnar glower, illuminate the low place, make into the scattered light source, can more fully give play to specialty and advantage of LED light source, humanization.
4.Break through the concept of the traditional object color, the colorama lighting of the high degree of saturation brings visual cognition into a brand-new realm.
Usually the object, with different light sources (not mix with spectrum) Illuminate, can present different colors. Past light source all pursue the sunlight type, compared with sunlight, people customary object color appears under the canonial sunlight too. The object has determined color and color and luster of the object about different spectral reflectance and light source luminous intensity. Traditional light source (besides laser) Color purity high,getting higher in chromas only, mix by more background luminance (brightness) on shade of wavelengths single ,Namely has superposed the white light, has reduced the photic chroma of color, the object color is not so bright-colored, there is no result with LED highly purified blue, green, red light-struck object. We should fully utilize the characteristic of LED to drive and open up the new market, open people’s new visual field.
5.Break through the concepts of the traditional lamps and lanterns, the illumination should be a system.
LED industry technology is developing constantly, the improvement which studies luminescent efficiency is industry’s technical mainstream. But should utilize shade of light sum, only convey to the required place effectively, meet physiology and psychology of human vision’s needs, the spectrum that must study different frequency is made up with human vision cognitive adaptation, light source of research, lamps and lanterns, light distribution reach human body and visual interaction, until one the intersection of value chain and system go, study how getting effectively really it will be people, healthily, go things that look around through lighting system scientific, increase the valuable new element in the value chain, put forward the value used, go to promote the market, expand market demand.
Tags: LED, The semiconductor is lighted
