Shenzhen Longrun LED Optelectronic CO.,LTD
Shenzhen Longrun LED Optelectronic CO.,LTD
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Outdoor Front Access and Front Service Adjustable Aluminium Profile Panel Size Based On 320*320mm Modules
√ Ultra thin panel saves mounting space.
√ Simple front Installation and front maintenance.
√ Aluminum profile panel support wall-mounting frame easy installation.
√ Adjustable panel size based on module of 320 x 320 mm.
√ Reducing the cost of steel structures by nearly 25%.
√ Vivid Picture with a Wide Field of View for Advertising.
Shenzhen LongRun Optoelectronic Company Limited was established in 2013. A professional LED display manufacturer engages in research, development, production, sales, and services for LED display product applications and solutions. We have 6 experiences in LED display R&D. Especially for indoor and outdoor LED screen solutions. We are located in Baoan District, Shenzhen city, GuangDong province, China with convenient transportation access. Covered in an area of 30,000 square meters, ultra-clean, and anti-static plant. Our company has introduced a series of advanced equipment, such as SMT machine, reflow soldering machine, auto screw driving machine, Tin Paste Printer, glue pouring machine. In addition, we have obtained a CCC CE certificate, high tech enterprise certificate, and multiple new pattern certificates, moreover, we have passed quality certification of I S O 9 0 0 1, environmental management system certification of I S O 1 4 0 0 1 , and health and safety system of O H S A S 1 8 0 0 1 certification. LongRun is detected to provide suitable solutions and good services. For an user customers around all cities and provinces in China, also export to clients in such countries in a way such as America, Europe, Southeast Asia, Middle East, South America, South Asia. We welcome OEM and ODM orders, whether selecting a current product from our catalog or seeking an engineering system for your application, you can talk to our customer service center about your sourcing requirement. Welcome to visit our factory at Shenzhen Baoan district nearby airport.
| Q: What is the brightness, viewing angle and wavelength of the LED? |
| A: Luminous Intensity is equal to the amount of luminous flux emitted into a very small solid angle at a defined angular orientation from the light source. The measurement for luminous intensity is the candela. Symbol is Iv. Viewing Angle is the total cone angle in degrees encompassing the central, high luminous intensity portion of the LED beam from the on-axis peak to the off-axis point where the LED intensity is 50% of the on-axis intensity. This off-axis point is known as theta one-half ( 1/2). Two times 1/2 is the LEDs' full viewing angle; however, light is visible beyond the1/2 point. Wavelength is the distance between two points of corresponding phase and is equal to waveform velocity divided by frequency. It defines what color human eyes could recognize |
| Q: What is dominant wavelength? Please specify the ranges of wavelength in red, green and blue color respectively. |
| A: Dominant wavelength is defined as the best range of wavelength showing the most natural color recognized by human eyes. Researches indicate that fixed colors with wavelength of 620-630nm (red), 520-530nm (green) and 460-470nm (blue), in fact mixed in a particular proportion, can get the pure white. That is, in display field, people use luminous materials with above wavelength to make "compounded" white more natural.In order to get a good balance white led display, we specify the led colors with wavelength within 4nm for each color |
| Q: Which chip vendors are you buying from? |
| A: It depends on the Customer's requirement. We can purchase from Japan, Korea, Europe, USA. We are using chips mainly from Taiwan |
| Q: What is the chip size you're using for outdoor display? How about indoor display? |
| A: For outdoor display, we're using 12mil chip for red, 14mil for both green and blue. Regarding indoor display, 9mil for red, 12mil for green and blue are currently adopted |
| Q: How much will the brightness of LED drop down after 1000hrs? |
| A: Based on the result of aging test, the brightness decay of green LED is around 5%-8%, while blue is around 10%-14% and red is around 5%-8% |