LED because of its high efficiency, energy consumption, long life, reliable and durable, environmentally friendly features such Governments and LED manufacturers of LED lighting applications in the development potential of high hopes. LED luminous efficiency of production from the initial 0.05lm / W to 130lm / W now, large-scale industrial applications of LED lighting is about to start is no longer criticized.

However, the current LED market a kind of phenomenon, many LED companies focused on the competition among enterprises within the LED industry, if the LED market is a Red Sea. the Cree

the United States, President and CEO Chuck Swoboda said China Huizhou LED Engineering interview yesterday, LED lighting is not only competition between the LED chip companies, the biggest competitor is the traditional lighting. Chuck Swoboda's words, it is worth serious consideration of the LED industry insiders.

led bulbs home lighting technology is still improve

Although LED 130lm / W luminous efficiency more than any kind of light source, to meet a variety of The traditional lighting applications. LED lighting is a complex, high technology, the LED for lighting package, optical, power-driven, heat lamps, light distribution and other design. Every aspect of the design is good or bad will be the actual luminous efficiency of the final design of LED lighting, the cost impact.

part of the production market LED lighting in the actual application system low luminous efficiency, poor reliability, the light fades the problem of serious, high cost. The overall light efficiency of LED lighting, the light fades, the price, there is no way to completely replace the traditional lighting.

Chuck Swoboda said LED industry enterprises should be mutually collaborate to strengthen the R & D of LED technology, LED luminous efficiency of the optical design of the lighting, power supply upgrade, there is another key element is the overall cost of the lamps constantly reduced to close to the user's tolerance.

biggest competitors to traditional lighting

should be recognized is that LED lighting also failed to flex its muscles in the market. The practical application of the luminous efficiency of LED lighting, the price does not compel the broad consumer acceptance, but also can not challenge the traditional lighting.

we see the LED business is not a good sign, stand still technically hot loyal competition between the LED field, take a particular technical indicators were contrasted. light

Shenzhen City Environment Management Center Director of Planning and Design Studio Wu Chunhai in Shenzhen LED lamp test results after the announcement, said that each enterprise is a bit disappointed, because the enterprise only concerned about their data compared to how others without great importance to the problems reflected in the data itself. Data analysis, the 27 LED lights, there is still much room for improvement, and hope that the enterprises to actively seek a better solution, to continue to improve the product.

Chuck Swoboda to remind the industry, the LED competition is not competition between the LED industry enterprises, the biggest competitor of the traditional lighting is LED.

Recently, LED Engineering Industry Research Center, Mr. Zhang Xiaofei in a well-known site interviews also suggested that the industry should be more rational development. He said that the field of LED lighting applications is very broad, not all companies have to do the street lamps. From a technical, applications from other segments, channels, more rational to do, the industry before we can develop a more stable and will not cause the waste of social resources.

enterprise should focus its resources to overcome technical difficulties to find the product innovation of the subdivision applications, LED products in the luminous efficiency, reliability, cost to catch up with the traditional lighting products, will it be possible for the majority of lighting users accepted, in order to form the scale of industrial applications; In addition, enterprises should be accelerated to create LED lighting product brand and a unique led spot light marketing channels; formed from the technology and market competitiveness of traditional lighting.

Introduction the

light-emitting diodes as a the power , long life, energy loss hair the optical devices , the rise in the country for nearly two decades, due to its special performance superiority is gradually to replace the light-emitting device, used in every corner of the industrial and civil. With the shortage of human energy, the market prospect is very impressive. In recent years, LED increasingly wide range of applications in the city lighting engineering, industrial and civil construction industries. (According to the Central News Network, Shanghai Oriental Pearl TV Tower on the lighting project recently replaced all the The LED shows , save energy and enhance the aesthetics) It is reported that the civilian light-emitting diode chip has been successfully developed in a foreign country to foresee the near future, the decoration of your home will use light-emitting diode lighting.

Overview

domestic LED manufacturers more and more, mainly in the stall of products accounted for nearly 50 percent of the market, about 40 percent of high-end market is still foreign-funded enterprises. occupied, which went on Hong Kong businessmen and Taiwan. This shows that the LED market prospects are still very impressive. Development opportunities while giving domestic manufacturers of the supporting material, such as chips, epoxy encapsulated material, mode bar (mold particles), stents, etc..

epoxy encapsulation material about 50% of the market in accordance with the resistance in imports mainly high-end market. As trihexyphenidyl, Yutaka Nakagawa, force, EPFINE and so basically occupied the high-end market. Domestic production of LED epoxy package material earlier Shao Hui Group emerged in recent years the production of like Shunde ACR, Changsha, Blue Star, Jiangyin Star and other production companies, but domestic enterprises remain basically at the lower grade packaging materials, production is also smaller, high-end requirements of the product is still a long way to go. The market strength of domestic enterprises and research institutions, development and production of high-end bit of the epoxy material.

in epoxy resin for many years, now available research results in the encapsulation material to the peer reference, hoping to play the effect of forward force contribution to the development of the domestic led tubes Mi thin.

a main agent of choice of materials

1 epoxy resin: a transparent colorless, low impurity content, low viscosity, the principle. Such as Dow Chemical, 331J, 127 of South Asia, Japan's Mitsui 139, Dainippon Ink EP4000 can be applied in low gear market Hongchang of 127.

2 reactive diluent: general alicyclic pairs official reactive diluent is better, but basically can not produce domestic or priced too high, AGE instead of special occasions can be used in South Asia, but AGE strength after curing affect the degree of crosslinking is not enough. If the low viscosity of the resin, or may not choose to add the diluent.

3 defoamer: to be compatible with good, good anti-foaming, low boiling point solvent as a criterion. Such as BYK-A530, BYK-066, BYK-141, Deuchem 6500, etc. can be used.

toner: add 80% of the main epoxy resin generally 20% of transparent capacitive oil dye, heating mixing miscible to a small amount to add, you can remove resins and other materials to add caused by the slightly yellow, and can ensure pure color after curing. Note the transparent oil capacitive dye selection, need to have at least 150-180 degrees temperature conditions to prevent discoloration when heat curing. Such as Bayer PEG-400.

5 release agent: the principle of stripping effect, good compatibility, light in color. Such as Guangzhou Kola Secretary (BYK agents) resistance levels-900, three-Hill Electronic Materials plant in Wuxi TMA release agent can be used. Dosage according to the different materials make a difference. The release agent can be added to the main agent can also be added in the curing agent.

two, the material of the curing agent to select

1 methyl hexahydrophthalic anhydride domestic the Jiaxing Alpha fine chemicals, Henan Pu Yang Hui fine chemical production, but generally high levels of free anhydride only for the production of the low block. The higher requirements of the Italian LONZA company's products.

2 promoting agents, many domestic manufacturers in this regard to waste a lot of time, in fact, the anhydride system using quaternary ammonium salt, or feasible, such as the Institute of Chemical Engineering of Zhejiang Jintan tetrabutylammonium bromide four bromide amines, but the latter compatibility may not be good, you can use alcohols such as benzyl alcohol, glycerol diluted. But will affect the strength. The former is better.

3 antioxidants prevent anhydride high temperature curing is oxidized. Requirements compatible, light color, a common 264 can also be used in less demanding.

formula for example: (The following recipe is for reference only, I do not assume any responsibility)

main agent: R-139 96.6 curing agent: methyl hexahydrophthalic anhydride 95.54

AGE 3 tetrabutylammonium bromide 1.4

blue dye colorant 0.3 264 antioxidants 1.5

BYK-A530 0.05 glycerol 1.5 < P> the FIN release agent 0.05 0.01 blue dye colorant 100 copies

total Total 100

ratio: 100/100

four production process < / P>

not involved in the synthesis reaction, the production process is relatively simple, generally heated to 80 degrees, stirring for about an hour, cooling the discharge can. Order to pay attention to the material added, such as the solid material after the first liquid material sparse dissolved and then click Add.

Conclusion

light-emitting diode encapsulation material market is dominated by the Pearl River Delta, along the coast of Fujian, Zhejiang, Shanghai, Jiangsu market are large. These years and the market has developed rapidly, and have gathered many LED manufacturers such as Hunan, Hubei, Jiangxi, Tianjin. About 30 tons, such as of Zhongshan mulinsen month using materials, Zhaoqing Li Germany, with about 20 tons, the amount of Dongguan Lee Chau month in about 15 tons, it is estimated that the entire led garden lights market and domestic monthly amount of 500 tons up and down. In summary, the domestic epoxy resin processing enterprises to complete replace the import market is still large gaps, it depends on the one hand supporting the supply of domestic raw materials, the other hand, how to improve product quality from a technical and applied in high-grade The application of the product occasions.

LED energy-saving lamps because of their effective energy-saving, long life, no stroboscopic effect, noise-free, wide range of soft light voltage characteristics of the increasingly welcomed by consumers. led garden lights energy saving lamps on the market today, the quality varies greatly, many consumers in the consumption process does not achieve the desired results.
A complete industrial chain end should be marketing and brand services, although the good momentum of development of LED industry at the present stage, but most companies gathered in technical R & D and processing and assembly aspects of the profits of the whole industrial chain uneven distribution of lead resources allocation emergence of a large deviation, the quality of the product as a whole depends on the weakest link, if not effectively solve the short board, under the influence of the barrel effect, the product quality will be greatly reduced.

from the market point of observation, the consumer product awareness or some flaws. Terminal of the LED industry market and not very prominent brand, the brand is also very limited impact on consumers, brand factors aside, consumers will tend to low-priced products in the selection process, and such products in the quality often difficult to get effective protection, quality defects seriously dampen consumer confidence in the market, as well as the desire for consumption of LED products.

According to the Investment Advisor in the release of "2010-2015 China's semiconductor lighting (LED) industry investment analysis and forecast report, the state mandated led bulbs home lighting manufacturer marked on the product packaging : rated voltage, the voltage range of rated power, rated frequency. In general, good quality products of the trademark printing quality, legible and easy to fall off, wipe with a soft damp cloth signs legible, indelibly, there are manufacturer's trademarks and certification marks. Shoddy products print quality is poor, fuzzy fonts, easy to erase, no manufacturer's trademarks and certification marks.

Insiders pointed out that, although at this stage the major vendors are actively upstream development, brand building of the end of the plate can not be ignored, it will to some extent, a direct impact on market share, accounting for the degree. The voice of the market from the brand-building, domestic enterprises is the lack of specific brand positioning, does not establish their own goals, such high-quality products in a regulated market competition, will certainly be buried, the battle for market The victim, therefore, present another problem to be solved is to standardize market practices, foster good competitive environment.

According to the display principle of the liquid crystal display, a character or graphic display, in addition to need LCD templates, also need to have a complex control circuit and driver circuit, so LCD manufacturers of liquid crystal display driver circuit voltage divider circuit, temperature compensation circuit and control circuit together, called the LCD module (LCM), so that designers do not have to deal with the problem of the specific character graphics display, but will focus on the design of the display.

briefly LCD monitor MG-12 232 (pin definitions as shown in the table) the drive SED150FOA structure, function on the basis of introduced PIC16F877 single chip LCD hardware interface circuit characteristics and software programming.

Table MG-12232 module pin definition

SED1520FOA is the ranks of drivers and the control of one small-scale LCD driver chip, the circuit is simple, economical and practical; it contains the oscillator, just an external oscillation resistor can work, the stability of the module. SED1520FOA microprocessor interface signals are as follows:

DB0 ~ DB7 data bus;

A0: data / command select signal, the show now on the data bus is the data when A0 = 1; A0 = 0, expressed on the data bus is instruction or read out the state. The LCD display flashes causes and solutionsComparing the two types of display of CRT and LCD, of which one is most common to see the difference between a flashing problem. Usually think that the CRT display screen flashes, the LCD is not verified two types of display all the flashing to a certain extent, differences in the mechanism and corrective methods affect the success rate. This article describes the flashing reason appears on the LCD screen, and proposed to avoid flashing method led garden lights.

LCD display technology

liquid crystal display (LCD) in 1973 on the calculator, the first LCD is embedded with seven sections of calligraphy and painting, the figures thus be display. The next-generation LCD available in 1980, belonging to a dot matrix (dot-matrix) shows, in addition to display numbers, characters and graphics, such as simple monochrome computer screen or the popular "electronic pet" his mother, brother pool. These matrix design through start the array in rows and columns of pixels as a control, to replace each pixel needs a separate control line. To the late 1980s, the color filters embedded in LCD design inside. Beginning after successive products are concentrated in the improvement of the screen size, monitor weight, energy efficiency, viewing angle.