At the opening ceremony of the Expo, the beautiful lighting on the stage, the colorful and colorful screen background, and the flamboyant fireworks display performed by Pujiang jointly presented a visual feast for the audience. LED is deserved to be this. The protagonist of the feast; in the Expo Park, the lighting of the stadiums decorated by LEDs has become a major attraction of the Expo World Expo, and is very popular for the audience. From the Beijing Olympics to the National Day celebrations to the Shanghai World Expo, the application of LEDs has become more extensive and creative with the development of its technology. The Shanghai World Expo has become an integrated platform for LED's latest technology, pushing its application to a new level. Opening Ceremony: LED presents a visual feast. Hao Luosi, the person in charge of the overall planning of the night scene of the Shanghai World Expo Park, praised the stage: the lighting of the stage uses the latest LED technology, beautiful, high color saturation, creating a gorgeous stage scene; The means of lighting technology has formed a panoramic three-dimensional expression, which has achieved the ultimate artistic effect.
In addition to the stage lighting, many viewers also noticed that a giant "white dove" appeared on the stage in the prelude, waving wings with music. In fact, the "White Dove" is a rectangular square consisting of 770 LED lights, and is presented in the form of "inferior" and "yang" in Chinese traditional engraving. The square array is completed by 770 independent servo motors under computer control and is one of the most technologically advanced components in the field.
The opening stage is based on a huge LED display wall. The main stand screen consists of 9 layered and detached LED screens with a pitch of 6 mm. The total pixel value is 9696×1056 and the area is nearly 372 square meters. At the fireworks show, the big screen on the riverside is also full of brilliance. Xiong Feng, assistant director of the Shanghai Semiconductor Lighting Engineering Technology Research Center, said that a large screen needs to use LEDs of the order of 10,000, so that they can cooperate well and make mistakes. This is a complicated technical problem. First, system integration needs to take into account signal delays, as well as color matching, and brightness and chrominance control should be appropriate. In addition, in order to improve the screen resolution, it is necessary to accommodate as many LEDs as possible in a small area. Therefore, how to solve the heat dissipation problem is also a big challenge.
In order to ensure the long-lasting and reliable LED effect, in the past few years, from the luminaire to the system, the staff has carried out strict testing and evaluation of the components of each link. "Power, drive or chip, as long as we can use domestic chips, we try to use." Xiong Feng believes that the application of LED to the Expo will also greatly promote the development of the domestic LED industry.
Although the Expo Garden is awkward, the actual electricity consumption is not too large, thanks in large part to the application of LED technology. The urban best practice area in the Expo Park and the landscape lighting of the “One Axis and Four Pavilions†all adopt LED. More than 80% of the entire park's night lighting adopts LED, which has become the world's largest LED centralized demonstration area, achieving energy saving of 60%.
Located in the center of the Expo Axis, its large membrane cover and trumpet-shaped Sun Valley are particularly bright under the illumination of the changing color LED lights. Designers install LED illuminating points at the intersection of Sunshine Valley steel structures to display images and text with low resolution. In addition, in the stretched film portion, the LED is also used for floodlight illumination. The Expo Axis takes full advantage of the dynamic changes of the full spectrum of LEDs to create a cheerful atmosphere.
The Expo Center in the northwest of the Expo Axis also uses yellow and blue LEDs of different color temperatures to form a straight line of vertical and horizontal lines, simple and well-proportioned. On a few open spaces around the Expo Center, blue small ground lights are randomly embedded in the floor tiles, which seem to be randomly falling on the stars, adding a little liveliness to the building. The theme pavilion is located in the southwest of the Expo Axis. The outer wall is encrusted with green plants. The combination of night plants and full-color LED lights is different. In the north-south façade, the curtain wall aluminum plate has a square hollow hole that gradually decreases in density and gradually forms a façade texture. The lighting design uses an aluminum plate opening and an LED flood light is placed below to form a spatial rhythm of the façade light. In the culture center of the UFO shape, the future of "space visitors" is highlighted. On the one hand, the smooth and sleek casing of the flying saucer is emphasized by the light; on the other hand, the size is different in the lighting window on the surface of the upper casing, and the light is transmitted from the inside to the outside, because the LED floodlight is installed in the lower part of the circular window. This illuminates the side walls and inner walls of the window opening, which produces this effect.
In addition to the “One Axis and Four Pavilions†and the Urban Best Practice Area, the Shanghai Expo Park's square lighting, riverside landscape belts, signage and intelligent guidance systems, and some indoor and outdoor lighting also use LEDs. According to statistics, the Expo Park will become the world's largest LED demonstration zone. The industry believes that this Expo will become a wonderful epitome of green lighting and new display technology. The six-month exhibition period will have demonstration and guiding significance, and will have a positive impact on the industrial application of new technologies and market outbreaks. (Editor: Cheng Xiang)
A PVC Insulated Power Cable is a electric cable with flexible copper or aluminum conductor ,PVC insulation and PVC sheath. For some special application like for direct burial or for exposed installation, protective jacket of steel tape or wire is also necessary. The shape of PVC insulated Power Cable may be round or flat. Some PVC cables may select flame retardant material sheath for fire safety consideration.
Product Features
l Widely used to transmit and distribute electrical power in low voltage circuit.
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Using features
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Cross-section of conductor ≤300 square mm: 160℃;
Cross-section of conductor ＞300
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Application
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l Steel tape armored (STA) type is able to bear external mechanical force but unable to bear large tension for laying indoors, in tunnel or pipe.
l Steel wire armored (SWA) type is able to bear external mechanical force and certain tension while apply for laying in high drop are.
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