How has LED technology evolved?

The innovation in LED technology can be seen in the LED filament: the light and shape of LED filament bulbs are very similar to traditional incandescent bulbs, but use the most advanced LED technology.

The light is irradiated by means of luminous filaments composed of miniaturised LED strips. Each single LED filament consists of a bar about 0.5 mm thick, 1 mm wide and of variable length, on which dozens of micro LEDs are positioned and connected in series. The bar is coated with yellow resin to give the light the desired colour and warmth. When switched on, the LED filament looks like a thin incandescent wire and the light is emitted through 360 degrees. 

Curved LED filaments represent the latest frontier: an innovation that can further improve the performance of LED filament bulbs. Curving the filament structure into a helical shape is a simple but ingenious solution for improving light irradiation. The convex shape of the filament directs the light evenly at 360°, and the twisting prevents the filaments from creating shade on one another, thereby improving yield and avoiding any scratches on the bulbs' covers.

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