Feature

1. Standard dimension,module size 250mm * 250mm, cabinet size 500mm * 500mm, compatible P3.91 outdoor common-cathode led module.

2. High-precision die-cast aluminum cabinet, seamless unit box.

3. New design of top side lock,secondary small red lock to avoid loose cabinet caused by unintentional touch.

4. One-button open back cover,easy to take off the power supply and receiving card.

5. Module with back screw , uncessary to prepare tool, easy to fix and take off modules by hand.

6. Corners with small protectors, save the money,package and space.

P3.91 SPECIFICATION

Product Pictures

What is the biggest difference between common-cathode led display and traditional led display?

The separate power supply of RGB chip.To lessen the currents' waste,the consumption is lower and heat is less which ensure the color temperature.Displaying a long-time, natural and vivid picture under outdoor hot weather is better.

Shenzhen Longrun Optoelectronics Technology Co., Ltd., shortly named as Longrun Optoelectronics, was established in 2013. It is a high-tech LED display enterprise integrating R&D, production and sales. Headquartered in Longrun Optoelectronics Technology Park which locates in Shajing of Shenzhen, it covers an area of more than 30,000 square meters, with independent purification plant, research and development base and the most advanced production and testing equipment of this field .Owing a registered capital of 30 million yuan, it creates an understanding production capacity of 500,000 square meters annually.Since its establishment, Longrun has taken innovation as the core competitiveness of the market, and promoted the rapid development of the company through the interaction of talents and capital. The personal value of employees can be realized, and customers' needs can be maximumly satisfied. Relying on the strong research and development capabilities of the team, the keen sense of market, excellent innovation concept, unique product design, and strict production process, we have produced a large number of products that meet the market demand. There are 3,000 successful cases and annual sales exceeding 300 million yuan. .Longrun has won numerous awards in the field of LED visual display. It has been rated as an innovative small and medium-sized enterprise in Shenzhen and has more than 30 national patents. The new COB display launched by Longrun has revolutionized the introduction of ultra-high physical performance of waterproof, anti-collision, dustproof and anti-static into the ultra-high-definition display field, which is another masterpiece of the innovation of Longrun Optoelectronics Technology.Longrun attaches great importance to product quality and introduces standardized management into every aspect, from raw material procurement to production, installation and testing. Each step is carried out in accordance with ISO9001:2008 international quality control process. Longrun has a first-class fully automatic production line and various advanced quality testing equipment.Process flow includes four strict consecutive inspections of IQA, IPQC, FQA, OQA, SQE, MQE, PQE, CQE and rigorous 7S quality inspections. The products have passed the quality certification of RoHS, CCC, CE, FCC, ETL, IP67 dustproof and waterproof test, anti-sunlight glare test, electromagnetic compatibility test, high and low temperature test, heavy metal content test, etc. by professional institutions to ensure that each product leaves the factory. Both are stable and reliable, and some products have passed the US UL certification.Our sales and service network is constantly booming. Our market mainly divided into domestic and international parts. The domestic market has covered 35 provinces and regions. Overseas business expansion has also covered more than 130 countries and regions including Europe, North America, South America, Russia, Saudi Arabia, India and Singapore.