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تاريخ التسجيل: Mar 2012
dxnbdi47 غير متواجد حالياً  
قديم 2012-03-15, 11:23 AM
  المشاركه #1
Fujian Jiangle Lighting Design _led display techn

harmony throughout the times square area of 21 square meters, construction area of 510,000 square meters, the project buildings are divided into five functional areas, including the business office area, harmony atrium blocks, riverside dining area, living and leisure area in suzhou's first 17 jiuguang million square meters of area, people pay more attention in planning the experience, considering the value system of business and tourism. 500-meter giant magical canopy, 6 large subway, water taxi, air corridor, mist square, parking system, subject landscape, fashion night from the overall planning point of view, operating in harmony in times square draws world-class commercial real estate development model, whether it is landscape, traffic, or other supporting set, ideas are more advanced. los angeles neon signs
third, the design experience of a solar street light, road illumination and the application under "city road lighting design standards" requirement: expressway average illuminance 20lx, uniformity of 0.4, the average trunk road illumination 15lx, uniformity of 0.35, sub-distributors average illumination 8lx , uniformity of 0.35, the average slip illumination 5lx, uniformity of 0.3. led lights are now in use, due to technical conditions, led power small 30 ~ 100w, luminous efficiency 50 ~ 80lx / w, low illumination path, i have been tested in stroke by 8.5 meters, the spacing of 30 meters, light sources 2 & time50wled lights, lamp illumination 19lx, between the two lights 11lx, the dark 3.5lx.neon signs wholesale
led die. the device is designed to carry more current than the previous unit, the need to ensure that the high heat flux to make the junction temperature minimum. this will ensure that in a number of demanding applications, the device has a sufficiently long service life. when connecting the positive or negative led die junction line cut off, they usually occur led failure. is a common cause of broken wire bonding temperature cycle, which is caused by the lack of heat dissipation junction temperature caused. led die will be placed in the incubator and the test plan in accordance with the test mentioned above can be obtained the following results: temperature tj1 (25 ° c) when, vf1 = 1.01v temperature tj2 (50 ° c) when vf2 = 0.78 vm = (50-25) ° c / (0.78-1.01) v =- 108.70 ° c / vto = tj1-mvf1 = 25 ° c-(-108.70 ° c / v) & time (1.01v ) = 134.79 ° c, therefore, describe the device junction temperature between the forward voltage of the first order equation is: tj = (-108.70 ° c / v) .business signs
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الكلمات الدلالية (Tags)
design, display, fujian, jiangle, led, lighting, techn


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