Taiwan Jiaotong University to create a highly flexible yellow white LED

CnBeta website news, Taiwan Jiaotong University, using existing technology, creating a highly flexible yellow color white LED. These LED can be made into a uniform sheet, and has the flexibility and flexibility, may soon appear in the TV and wearable display.

The device is composed of 81 mounted on the copper foil on the blue chip LED, installed in the copper foil, it covers itself and firm durable flexible polyimide substrate, the outermost layer is the researchers added a layer of transparent and soft poly two methyl siloxane yellow fluorescent film, it is non flammable and non-toxic inert.

This design allows the blue LED light to eventually turn into a warm white yellow light. The researchers found that the covering film thickness determined how many scattering and reflection light, researchers can clearly distinguish the single LED light source, after proper adjustment, researchers can obtain a uniform or nearly uniform light sheet.

Ultimately, this product has reached 85% of the light output uniformity and light efficiency of 120 lumens per watt, the performance is higher than the standard LED lamps, such as the price of $4.97 PHILPS 8.5 watt 800 lumens LED bulbs. After 1000 hours of operation, the device output light loss of only five percent.

National Chiao Tung University, this research paper has been published in the Journal of optical express.

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