The description of LED

LED (Light Emitting Diode), light-emitting diode, is a solid state semiconductor devices, which can be directly converted into electricity to light. LED is the heart of a semiconductor chip, the chip is attached to one end of a stent, is the negative side, the other end of the power of the cathode, the entire chip package to be epoxy resin. Semiconductor chip is composed of two parts, part of the P-type semiconductor, it inside the hole-dominated, the other side is the N-type semiconductor, here is mainly electronic. But linking the two semiconductors, among them the formation of a "PN junction." When the current through the wires role in this chip, will be pushing e-P, P zone in the hole with electronic composite, and then to be issued in the form of photon energy, and this is the principle of LED luminescence. The wavelength of light that is the color of light, is formed by the PN junction of the decisions of the material.

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The history of LED

50 years ago, people have to understand semiconductor materials can produce light of the basic knowledge, the first commercial diodes in 1960. English is the LED light emitting diode (LED) acronym, and its basic structure is an electroluminescent semiconductor materials, placed in a wire rack, then sealed with epoxy resin around, that is, solid package, Therefore, the protection of the internal batteries can play the role of line, so the seismic performance LED good.

LED is the core of the P-type semiconductor and components of the N-type semiconductor chips, the P-type semiconductor and N-type semiconductor between a transition layer, called the PN junction. In some semiconductor materials in the PN junction, the injection of a small number of carrier-carrier and the majority of the extra time will be in the form of light energy to release, thus the power to direct conversion of solar energy. PN junction on reverse voltage, a few hard-carrier injection, it is not luminous. This use of injection electroluminescent diodes is produced by the principle of light-emitting diodes, commonly known as LED. When it in a positive state of the work (that is, at both ends with forward voltage), the current flows from the LED anode, cathode, semiconductor crystals on the issue from the ultraviolet to infrared light of different colors, light and the strength of the currents.

Instruments used for the first LED light source instructions, but all kinds of light colored LED lights in traffic and large screen has been widely applied, have a very good economic and social benefits. The 12-inch red traffic lights as an example, is used in the United States have long life, low-efficiency 140 watt incandescent lamp as a light source, it produced 2, 000 lumens of white light. The red filter, the loss-90 percent, only 200 lumens of red light. In the light of the new design, Lumileds companies have 18 red LED light source, including the loss of circuit, a total power consumption of 14 watts to generate the same optical effect. Automotive LED lights is also the source of important areas.

For general lighting, people need more white light sources. The 1998 white LED successful development. This is the GaN LED chip and Yttrium Aluminum Garnet (YAG) package together cause. GaN chip of the Blu-ray (λ p = 465nm, Wd = 30nm), made of high-temperature sintering of the Ce3 + YAG phosphors excited by this Blu-ray after irradiating a yellow, the peak 550 nm. Blue-chip installed in the LED-based Wanxing reflection in the cavity, covered with a resin mixed with YAG thin layer, about 200-500 nm. LED-based tablets issued by the Blu-ray absorption part of the phosphor, the phosphor another part of the Blu-ray and a yellow light mixed, can be a white. Now, the InGaN / YAG white LED, YAG phosphor by changing the chemical composition of the phosphor layer and adjust the thickness of the 3500-10000 K color temperature can be colored white. This blue LED through the method by white, constructed simple, low-cost, high technology is mature, so use the most.

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LED:how to install power supply

First step: calculate the total power module, the LED switches to configure the appropriate power supply (80% power output configurations). Total = number of modules x module power consumption power consumption such as 300 three lights 3528 SMD LED module, the rated power is 300x0.25=75W

Second step: fix the module. module fixed mode: 1. preliminary fixed plastic shell back double sided adhesive, then fixe with glass glue. 2. use glass glue directly fix; module surfaces should be wiped clean before installation or proper sanding, make sure the contact surfaces clean. 3. the plastic shell should with screws at the bottom.

Third step: connect the power supply after all modules installed, use 0.75mm or 18AWG wire connected to the power supply. Distance between power supply and modules should be 5 meters or less. If a larger font size, without affecting the module heat sink case, power supply can be built inside.

The development prospects of the mainland State LED

LED doomed its huge market will develop into a huge industry. Overall, the domestic industry in terms of size has been unsatisfactory, the typical case is the integrated circuit industry and the LCD panel industry, the domestic IC industry is now tail between its people, LCD panel industry is riddled with illness, technology complex, large investment and a weak infrastructure is the main reason, while the LED industry will break the curse, and can bring about the upgrading of industries, such as the domestic industry in LCD driver chips simply do not drive, because the LCD panel industry out of the country, support because of huge market, LED Driver IC is expected to flourish in the country to promote domestic enterprises bigger and stronger, which in turn will promote the domestic LCD driver chip or other chip-driven development.

We believe that the LED industry in China has good prospects for development, based on the following points: First, in terms of the technology, LED technology has the bottleneck of high growth, low-threshold characteristics of the study, the domestic long-term accumulation in the semiconductor field of research resources can be useful with a good basis for further study. Although the manufacturing of integrated circuits based on weak, relatively low technological level, but some domestic enterprises to join overseas technical personnel, continue to make breakthroughs in technology, technological level of domestic enterprises with good companies with the technological level of Taiwan or less the same as with international companies as a whole has been narrowing the gap; Second, LED invested relatively small initial investment will be 100 million plant, the domestic enterprises to enter the threshold of the low, easy to achieve a rolling development and manufacture of integrated circuits and liquid crystal panel manufacturers easily to tens of billions of billions of yuan in investment it is "insignificant" easier access to the domestic enterprises to form industrial clusters, of course, may also lead to vicious competition and to a certain stage of development of market integration; Third, the domestic market great, LED market is the next major general lighting market, the market capacity, end-consumer market, scattered and difficult to form a monopoly, a vast living space of domestic enterprises; Fourth, some companies have a core of intellectual property rights, such as crystalline silicon photovoltaic substrate can GaN-ray projects, Dalian Road, the area of the United States and the core of the chip technology, has global competitiveness of these enterprises on technology development in the demonstration effect easy to form and promote the healthy growth of the domestic business market; five, after maturity of the technology, LED downstream packaging and devices are labor-intensive production, the development of the mainland with the labor cost advantage.

More Our products: led stage lighting , wall washer , stage lights , stage lighting , moving head , stage light

Shock your vision with true color and wise light

Have you been shocked with true color and wise light of longman led stage lighting?


Parco R350-led stage light

Brief description：

1.18pcs*10W FULL RGBW LED

2.32 bit ARM processor dimming

3.Temperature control system inside

4.DMX 512 signal control, 4 bit digital display DMX address code

Size and Weight: 284*193*254mm/ 5KG

This Parco R350 projecting light is designed by high strength die-casting aluminum which is able to endure high temperature, designed in a stylish form. It uses high power led R,  G, B, W and characters of long life, low consumption, high brightness and excellent color. It uses power switch, performs low weight and low consumption, stable capability and long life. The built-in program includes dimmer, strobe, gradually change, fading, sound activation and so on. International standard DMX 512 signal is requested.

LONGMAN INTERNATIONAL GROUP CO., LIMITED

Longman is a professional manufacturers on lighting equipment manufacturers,we are committed to research,development,produing and sales.Since the company was founded in 2005 in guangzhou, China,we have been focused on independent R & D and production for LED lighting products and equipment.

Company Philosophy：To build world-class brand. we have created our proprietary brands named ‘Longman’ for stage equipment, Ledmewish’ for architectural landscape lighting and Reichy for stage truss and other related equipment.

Company Vision:To make stage and environment more beautiful,warmer and interesting ;Company Mission: To innovate light and create beauty;

Company Culture: To deepen technology to enhance our culture and artistic connote tion continuously. And we devote ourselves to advanced design project to meet increasing audience’s aesthetic taste;

Company Position: To focus on stage performance and dramatic architectural landscape lighting;

System and Certification:Our company has passed the quality management system certification of the TUV SUD

ISO9001: 2008; Products in our company are with UL, CE, ETL, RoHs, TUV, CCC and other international and domestic certification approved.

Patents: 20 utility model and design patents, three patented inventions.

Our company and co-workers are related to below International and domestic cooperation Association:

The International Association of Lighting Designers IALD Consultant (Affliate of IAL),Senior lighting designer for the National Alumni Association members ,The Chinese Association of Lighting Designers sponsors and members (Expert Menber of CLDA),Entertainment Services and Technology Association of the United States and (ESTA) members;China Entertainment Technology Association members ;China Association of Lighting unit members;Guangzhou City Optical Society members ;

Company Acheivement:

Our products have been applied to multiple gym and stadium construction in Shanghai World Expo and Guangzhou Asian Games; 16 of 29 halls in Thailan-Asian Expo in 2012 including the royal pavilion, Aeroklas hall, Honda hall etc; 2013 UABB Shenzhen-Hongkong biennial exhibition “Valued Factory”, Lanzhou West Railway Station,Baoji swimming diving natatorium, Chunglong Forest Temple and Ocean World Shanghai Ocean Hall etc ,all projects has got good consent by the government ,owner ,lighting designers and architect.

Company Honor:

Excellent Product Award of Aladdin Magic Lamp Award in June 2014; The Rock Award in annual award in 2014; Excellent Product Prize in Juncus Cup in 2014; Aladdin Magic Lamp

Award in June 2015.

Sales network:

The company has been in the United States, Canada, Germany, Britain, France, Brazil,Mexico, Australia, Singapore, South Africa and other countries authorized dealer ; In the domestic we have foothold in Guangzhou, and have been in Beijing, Shanghai, Xian, Chengdu,set up regional offices.

Our products have been exported to more than 120 countries and regions worldwide ,and it is widely used in stage,building external and internal ,and a variety of lighting effect.

We should strive unceasingly with one heart and one mind together based on mutual benefit to make our stage ,our world and environment more beautiful ,warmth and splendent !

Our products: led stage lighting , wall washer , stage lights , stage lighting , moving head , stage light