Construction Contractors Community

tmptkr57 · Joined: 13 Dec 2011 Posts: 66 Location: England

exhibition cene expo 2010 in cenal china across the taiwan sait (nanchang) international led exhibition area of the expo is expected to more than 20,000 square meters and over 300 exhibitors to be the audience 20,000 people. 2010 cross-sait (nanchang) international led show, meticulous organization, spirit attack, the exhibition to promote cross-sait cooperation and accomplishing the realization of economic innovation and brand image event, continuing to create "cross-sait first international exhibition of led" for technology and economic innovation and development of new ideas and new impetus for the indusy to promote quality products and provide new channels for scientific and technological achievements.lighted sign
vapor depositio pe-cvd) system in the top of the sapphire subsate deposited sio2, using sio2 as the etch mask layer at a temperature of 280 high temperature mixture of phosphoric acid and sulfuric acid etched sapphire subsate to form a patterned sucture. figure 2 for the use of wet chemical etching sapphire subsate () after the cross-section diagram; figure 3 shows optical microscope photographs. d. using the mocvd growth of gan-led in the etching of the patterned sapphire subsate c (0001) surface, gan-led sucture from the bottom up, including: gan nucleation layer, undoped gan layer, silicon doped n -type gan layer, mqw layer and the p-type gan layer. e. using standard lithography and dry etching to etch the part of the p-type .neon sign
test line in figure 3, for a stable output voltage conol device, when the input voltage rating of 92% to 106% range changes, the output voltage change compared to the rated voltage of led modules, the deviation should be less than lusm10 %, for a non-stable output voltage conol device, at rated input voltage, output voltage should be in line with the led modules are rated voltage lusm10% range. 2.2 led conol output current conol device conols the output current of the led conol device, if a stable output current, with a constant current source circuit that is internal, should be marked on the product "rated output current" and "maximum output voltage & rdquo ;. led with constant current characteristic conol device of the biggest feature is to watch from the input side, with a high output impedance, connected in its output a series of led.writing board