LED electronic screen

LED electronic screen B Add item? LED electronic screen as a low power consumption, the best tool for large-scale real-time dynamic display of information, it can display computer-generated dynamic graphic screen, LED electronic screen from the installation environment can be divided into three First, indoor LED electronic screen, two outdoor LED electronic screen, third is semi-outdoor LED electronic screen, ambient light each installation is different, so do not install the wrong, not looking too bright or too dark. LED display from his color component, usually three, one color LED electronic screen, two dual-color LED electronic screen, three-color LED electronic screen, full color four four different color variations Now the general market trichromatic more. Basic information Chinese name LED electronic screen origin Shenzhen, Jiangsu, Zhejiang area business presentation purposes, securities and futures, banking and other performance color, variety, ease of use, show good results catalog Brief 1 LED electronic screen briefly discusses two high brightness LED performance 3.x Applications 4 LED electronic display of high brightness LED production base 5 General presentation on LED electronic screen specifications are classified according to light spot diameter LED electronic screen briefly discusses the current market with a wide LED electronic screen, usually use it to display the company introduction, announcement , slogans, news, advertising, information dissemination is the best integrated media, products widely used in securities futures, banks, hospitals, schools, sports, transportation, post and telecommunications, finance, taxation, public security did not check, court, hospital , school, arts, government agencies, City Square, the intelligence community, the environment, meteorology and other fields. Choose what level of LED electronic screen First, it should be practical, real-time fast-play information, at the same time, it should also have easy operability, first-class hardware platform to support any model of software to achieve a variety of new unique expression, and secondly, it should have advanced and reliable, with advanced and reliable control devices and advanced production technology to guarantee. Ultra-high brightness LED luminous efficiency performance compared to ultra-high brightness red A1GaAsLED GaAsP-GaP LED, higher luminous efficiency, low transparent substrate (TS) A1GaAs LED (640nm) is nearing 10lm / w, than red GaAsP- GaP LED 10 times. InGaAlP LED provides high brightness of color and GaAsP-GaP LED same include: green-yellow (560nm), yellow light green (570nm), yellow (585nm), light yellow (590nm), orange (605nm), light red (625nm Crimson (640nm). Comparison with other luminous efficiency of the LED structure and incandescent light transparent substrate A1GaInP LED, InGaAlP LED absorbing substrate (AS) of the luminous efficiency of 101m / w, transparent substrate (TS) of 201m / w, at 590 than GaAsP-GaP LED's luminous efficiency of the wavelength range -626nm 10-20 times higher; in the wavelength range 560-570 of the higher than GaAsP-GaP LED 2-4 times as high brightness InGaN LED provides the blue. shade and green light, the blue wavelength range of 450-480nm, blue green 500nm, green 520nm; its luminous efficiency is 3-151m / w high brightness LED current luminous efficiency has exceeded the band filter. incandescent lamp, incandescent lamp can replace the power 1w or less, and replace incandescent lamps with LED arrays can be within the power of 150w. For many applications, the use of filters to get all incandescent red, orange, green and blue, but with high brightness LED can get the same color. In recent years, high brightness AlGaInP and InGaN materials manufacturing LED materials plurality (red, blue, green) ultra-high brightness LED chips together, can be obtained without the filter each colors, including red, orange, yellow, green, blue, now its luminous efficiency have been more than incandescent, fluorescent positive close. emission brightness higher than the 1000mcd, can meet the outdoor all-weather, full-color display needs, with LED color large screen can show the sky and the ocean, to achieve a new generation of three-dimensional animation red, green and blue high brightness LED unprecedented performance ultra-high brightness LED applications 1. Information LED car signal indicates: car lights in the car External main direction lights, tail lights and brake lights; inside the car is mainly a variety of instruments of lighting and display high brightness LED lights for cars with conventional incandescent lamps have many advantages compared to, has in the automobile industry. broad market .LED able to withstand strong mechanical shock and vibration. The average working life MTBF several orders of magnitude higher than incandescent bulbs, much higher than the working life of the car itself, the LED brake lights can be packaged as a whole, regardless of maintenance. Al.GaAs and transparent substrate AlInGaP LED and incandescent bulbs with a filter with a very high luminous efficiency, this LED brake lights and turn signals can operate at a lower drive current, typical The drive current is only 1/4 of incandescent, thereby reducing the distance traveled for automobiles. lower electric power can reduce the size and weight of automotive internal wiring systems, but can also reduce the integrated LED lights internal temperature allowing the use of lower temperature and cover lens performance plastics. Response time LED brake lights as 100ns, shorter response time than incandescent, thus leaving to the driver more reaction time, thus improving traffic safety guarantee. Automotive exterior LED illumination and color are clearly defined. Interior lighting automobile exterior light display, although not as controlled government departments, but the car maker and the illumination of the LED color required. GaP LED has long been used in the car, ultra-high brightness AlGaInP and InGaN LED in the color and luminance due to meet the manufacturer's requirements, and therefore the more interior replace incandescent lamps. Price-wise, though, compared with incandescent or LED light more expensive, but the whole system point of view, both the price and there is no significant difference. With high brightness TS AlGaAs and AlGaInP LED practical development in recent years prices have been decreasing in the future to reduce the magnitude will be greater. Traffic Signal indication: ultra-high brightness LED to replace incandescent, for traffic lights, warning lights, marker lights have been around the world, a huge market demand is growing rapidly. According to the US Department of Transportation statistics in 1994, the crossroads of the United States to install traffic lights are 260,000, each intersection must have at least 12 red, yellow, blue and green lights. Many intersections there are additional changes crosswalk signs and warning lights across the road. Thus, each intersection may have 20 lights, but also to simultaneously emit light. Thereby calculate the United States there are about 135 million traffic lights. Currently high brightness LED to replace the traditional incandescent lamp reduces power loss has achieved remarkable results. Japan's annual consumption in the traffic signal is about 1 million kilowatts, after ultra-high brightness LED to replace incandescent, its power consumption is only 12% of the original. Traffic lights competent authorities in each country should develop appropriate standards, regulations colors, the lowest illumination intensity, spatial distribution of the light beam pattern signals and the installation environment requirements. Although these requirements are written by incandescent, but is currently used in ultra-high brightness LED traffic lights is essentially applicable. LED traffic lights over incandescent, working life is longer, generally up to 10 years, taking into account the impact of harsh outdoor environments, it is expected to reduce life to 5--6 years. Currently high brightness AlGaInP red, orange, yellow LED has achieved industrialization, the price is relatively cheap, if the module consisting of red high brightness LED to replace the traditional incandescent red traffic signal head can be due to a sudden failure of the Security incandescent red the impact of low to a minimum. General LED traffic signal modules in series by a number of LED single lamp composed of 12 inch red LED traffic signal module, for example, at 3-9 in series of LED single lamp, LED single lamp number in each series 70-75 (In total 210-675LED single lamp), when there is a LED single lamp failure will only affect a group of signals, the rest of the group is reduced to the original 2/3 (67%) or 8/9 (89%) and not as head of the entire signal failure like incandescent lamps. The main problem is the LED traffic signal modules cost still appears to be higher, with 12-inch TS-AlGaAs red LED traffic signal module, for example, was first used in 1994, the construction cost is $ 350, and a better performance in 1996 12 British AlGaInP LED traffic signal modules, the cost was $ 200. Expected in the future will not be long, the price of InGaN blue and green LED traffic signal modules will be compared with the AlGaInP. Incandescent traffic signal head cost was low, but power consumption, power consumption of a 12-inch-diameter incandescent traffic signal head is 150W, the power consumption of the sidewalk across the street traffic warning lights of 67W, it has been calculated, every crossroads of the annual power consumption of incandescent lights One eight One Triple Triple KWh, equivalent to $ 1,450 per year of electricity; however LED traffic signal modules are very low power, each 8-12 inch red LED traffic signal modules power respectively for the 15W and 20W, LED signs available crossroads turn arrow switch display, power consumption is only 9w, it has been calculated for each intersection annual saving 9916KWh, quite an annual electricity savings of $ 793. LED traffic signal modules for each of the average cost of $ 200 dollars, the red LED traffic signal modules with only their savings in electricity, three years after the initial construction costs recoverable, and began to get economic returns. So now using AlGaInP LED traffic information module, although the cost appears to be, but a long look, or cost-effective. 2. Large screen display large screen display is another huge market high brightness LED applications, including: graphics, text, digital monochrome, color and full color display. Table 2 lists the various uses LED display. Traditional large-screen active display commonly used incandescent lamp, fiber, cathode ray tubes; passive displays commonly used method flop. Table 3 presents a comparison of the performance of several displays. LED display LED itself has been limited performance and color. Today, high brightness AlGaInP, TS-AlGaAs, InGaN LED has been able to provide a bright red, yellow, green, and blue colors, can achieve full-color fully meet the requirements of large-screen display. LED display pixel size can be assembled into a variety of structures, smaller pixel diameter generally less than 5mm, for each pixel with a T-1 (3/4) of the LED lamp monochrome display, each pixel of the color display for color T-1 (3/4) of the LED lights, full color display requires three T-1 red, green, and blue light, or a multi-chip assembly of T-1 (3/4) of the LED lamp as a pixel . It is large pixel by many T-1 (3/4) red, green and blue LED combined configuration. With InGaN (480nm) blue, InGaN (515nm), green and ALGaAS (637nm) red LED lights as LED display of the three primary colors, can provide realistic full-color performance, but with a larger range of colors including: blue-green, green, red, etc. , and the International System Committee (NTSC) color television TV prescribed range basically. LED electronic screen production base introduces LED electronic screen production base in Shenzhen, Shanghai, Beijing and other cities more famous these, of course, its LED electronic screen is no exception, and other LED electronic screen base which is distributed more widely, the main It is concentrated in the south! Conventionally LED electronic screen specifications are classified according to light spot diameter of the light emitting tube diameter divided (indoor single / double color, full color): Ф 3mm, Ф 3.75mm, Ф 4.8mm, Ф 5.0mm, Ф 8.0mm , (Ф the diameter of the circle represents a unit, Pronunciation fai) on the market more commonly used for the Ф 3mm, Ф 3.75mm, Ф 5.0mm, which has 62,500 per square light-emitting point Ф 3mm, and in the same area density is relatively large belonging indoor display of high-end products. Per square meter of the light-emitting point density into (Outdoor single / double color, full color): Mrs. Zero in 2000, 6944 points, 3906 points, six 2500 points, 2066 points to 1600 points, LED electronic display product features. and features: 1, screen combination of modular, installation, maintenance and removal easy 2, synchronized with the computer display, soft colors, clear graphics 3, the software can be partitioned, multi-function display, edit, simple and flexible 4, can display text, graphics, animations, video, video and other formats and signal source 5, the control system uses the most advanced large-scale integrated circuits ,, high stability, installation, commissioning, maintenance is simple 6, with over Category 5 cable transmission, a single cable that is One Zero II can transmit a store 687, long-distance optical transmission can be used, the maximum transmission distance 15KM 8, the actual pixel display and virtual pixel display can be switched by software 9, the virtual pixel display refers to the actual pixel on pixel basis according to people visual pause principle four times by technical treatment effect display (eg: a display unit 16 * 16 through the virtual pixel technology can achieve the effect of 32 * 32, the technology to achieve the limited investment objective to maximize display , thus saving the cost of investment) 10, 100 brightness adjustment, 32 non-destructive adjustment 11, using the constant current source driver chip, 1/8 scan mode, display vivid, detailed, and effectively avoid the phenomenon of mosaic 12, uses line lights tube, high brightness, light is relatively strong for places, such as semi-outdoor environment 13, according to user needs, can choose modules or packages of SMD LED full color display (from 360 Wikipedia http://baike.so .com / doc / store qi qi Wu Jiu Ba .html)