LED street lamps do the Tinghuo, many places want to change the street lights will be LED street lamp, and today we take a look

at the LED street lamp which our common problems, and then see which way possible to solve these problems. Test. The largest

sector contented urban secondary roads illumination of the LED lamps, the average requirement. The choice of substrate material

depends primarily on the following nine areas: 1, confusion in investment projects last year the Ministry of Science and

Technology Organization \"Ten thousand ten cities\" project was officially launched, the target is 2011, six million semiconductor

lighting for municipal engineering applications products. For local governments, both performance engineering, the development of

photoelectric industry good ideas, attempt or imaginary new to the region\\ s street lights and transformation to boost local

development and rise of the LED industry, to promote the development of the local economy. Major departments LED lamps basic

content with the requirements of urban roads brightness and the average degree and vertical average degrees. LED street lighting

to go beyond the traditional street lamps lighting the way to seek further light environment optimization, energy saving and low

maintenance capital. September 22, 2009, six ministries Posting semiconductor lighting industrial development views.

       Environmental impact: any chemical and biological contamination; color rendering index: high (Ra = 60-90); color

temperature and hue: more than variable; shock resistance: Good! Be able to train Road tunnel and cross the bridge guardrail; LED

light source applications, at present, LED light source in the lighting industry has been a large number of applications. Lighted

3000h, lumen maintenance should be higher than that is 960 – / 0; lighted 6000h light ⑥ destroy offspring move entropy in that

92c70; the end of life lumen maintenance should be higher or is 70070. data analysis, basic CJJ45-2006 in the city main road

lighting requirements. Extension products, the extension products used in four aspects of CMOS complementary metal oxide

semiconductor supports cutting-edge technology requirements of the small size of the device. Opinion about the development of LED

lighting products, development and promotion to replace incandescent, halogen and energy-saving effect is significant, cost-

effective semiconductor lighting, styling products; development and promotion of high-lighting a long time the function in the

parking lots, tunnels, roads and other functional requirements stereotypes of semiconductor lighting products; the development of

large-size LCD backlighting, automotive lighting, such as the growth potential of the semiconductor lighting products: the

development of medical, agricultural and special purpose semiconductor lighting products. Early 1980s, use of epitaxial wafers,

it has to scale PW does not have some of the electrical properties and the elimination of many introduced in the crystal growth

and subsequent wafer processing surface / near-surface defects. A trunk light comparison test (2008) with 140W-190WLED The street

lights replace 250W high pressure sodium lamp. Each set of LED street lamp with conventional green light lights 2000-5000 yuan

price difference, 1.6 million is about to spend more than $ 5.6 billion (yuan uniform 3500), about 60 years to recover the

capital, and LED lights have a life span of 60 years ? This is energy conservation?

       Bar policy of the Ministry of Science and Technology, local governments Loaning lights installed, the Ministry of Science

and Technology until acceptance and then to be subsidized, but government documents has not yet been issued, so the LED street

whether large-scale application on the subject, different regions and cities show different points of view. Different positions

and related policies of the government part of the pilot cities, but also lead to a loss of the other cities. The national total

of more than 4,000 LED produced this cake competition for the LED market, but these companies are not able to grasp the LED core

technologies, many of whom are trying to a good impression, plus LED local scale are emerging and national-scale delay not ,

leading to confusion in the LED market. The views of countries on the development of LED lighting field. In September of this

year, the Xinhua News Agency reported China\\ s application of more than 1.6 million LED lamps in the city of ten thousand, \"the

project, the annual saving of more than 164 million degrees, the annual electricity savings of about 90 million to 100 million

(street light electricity implementation of civil scale electricity per kilowatt of 0.5-0.6 yuan). Different substrates require

different epitaxial growth techniques, chip processing technology and device packaging technology, the substrate material

determines the development path of the semiconductor lighting technology. Buried layer semiconductor heavily doped region

physically isolated bipolar transistor components, which is the deposition of epitaxial processing. The main content of the test

include: the illumination of the road, and the average degree of surface brightness and the average degree of sidewalk

illumination and so on. Did not meet the lighting requirements in the scale CJJ45-2006 on the city main road Eav, namely, to

maintain the value 20/301x Ue the minimum level of 0.4.

       LED street lights should be different and the lighting in the form and technology. Confusion in government policies. The

light fades 300 – / 0, the number of lit (h): 100,000, 50000, 25000, 10000 … looking forward to the future, (National

Department of housing construction of public lighting applications Semiconductor (IED) product technology guide – discussion

paper excerpt) the uniform life expectancy of the LED lamps shall than 25000h.LED lamps shall be capable of passing through a

15000 switch test. Requirements of the light fades. Epitaxial deposition can (also) a processing multi-chip, also processability

monolithic. Support the development of pluralistic coexistence format oppose the swarm. The higher of the LED light color is

gentle color, high pressure sodium lamps highlight the surrounding landscape, identification progress. Different brands of street

light lamp illumination level, the average degree of illumination, surface brightness subjective feeling infection quite

different, the light source brightness difference within the lamps of different manufacturers. Because LED light simple to

replace existing high pressure sodium lamp, resulting in different lighting, road lighting parameters different. Do a lot of LED

and LED toward the meat and potatoes. Historically, the epitaxial film is produced and Si wafer manufacturer for personal use, in

the amount of IC top on the Si surface deposition of a thin single-crystal Si layer. 200 mm wafers, epitaxial wafers, 1/3.2000

years, including buried layer, accounted for 69% of all wafer for CMOS logic devices, accounted for 11 percent of the DRAM,

discrete devices accounted for 20% by 2005. CMOS logic will account for 55%, accounted for 30 percent of the DRAM, discrete

devices accounted for 15% of LED epitaxial wafers – the substrate material, substrate material is the cornerstone of the

development of semiconductor lighting industrial technology. Discrete semiconductors for manufacturing requirements with

precision Si characteristics of components. Bold and courageous support trial against the follow conservative. LED street

lighting of urban functions in the application point of view. General epitaxial layer thickness for 2 ~ 20μm Si substrate

thickness of 610μm (150mm diameter piece and 725μm (200mm film). \"Exotic\" (exotic) semiconductor contains a number of specialty

products, they use non-Si materials, many of which The use of compound semiconductor materials incorporated into the epitaxial

layer.

       LED street lighting to follow the existing road lighting specification. CMOS products is the largest application areas of

the wafer and IC manufacturers for non-recovery device technology, including the application of microprocessors and logic chips

and memory, flash memory and DRAM (dynamic random access memory). The manufacturer of semiconductor Department of style with a

polished Si wafer (PW) and epitaxial Si wafer as the raw materials of IC. Subjective evaluation of the site, the brightness level

of the measured sections from the subjective feeling of slightly less than the original high pressure sodium lamp (250W)

sections. A trunk road in Shanghai (June 2008) Data analysis of road illumination is low, average less the zebra significant

effect (see Figure 1). Monolithic reactor can be the output quality of the best epitaxial layer (thickness, resistivity, average

sex, fewer defects); this epitaxial wafers for 150mm \"cutting edge\" products, and all important 200 mm products produced. LED

lighting device as opposed to traditional light sources: greater adaptability of the light distribution, more adaptive light

control, the stronger the spatial distribution of adaptive lighting of LED functions should be out of the mode of the traditional

street lights, and create their own forms of lighting and technology. China LED status quo, in the direction the field of

technology is basically mature, has been widely used; technology has matured in the field of large-size backlight market,

according to the rate gradually progress; in the field of functional lighting technology has just started, still in the pilot

demonstration stage; In addition, the medical, agricultural and other special areas of semiconductor lighting technology in the

ascendant. Residents surveyed feeling infection was not significant LED street lamp in a smaller color temperature difference,

but cool to reflect more strongly purplish tendencies thrown in the test. Visual LED street light glare, slightly higher than the

high pressure sodium lamp.