# Seoul Viosys starts mass production of rare-earth-free white LED emitter

Seoul Viosys, a South Korean optoelectronics maker, has begun producing a white light emitter that avoids rare-earth materials, a rare step away from the phosphors that dominate white LEDs. The move matters because rare-earth supply is concentrated in China and subject to export controls, so a viable substitute could ease cost and supply risks for lighting and display manufacturers. Commercial scale and performance details were not disclosed.

**Importance:** 3/5

## Sources

### Technology
- [Hacker News](https://www.semiconductor-today.com/news_items/2026/oct/seoul-291026.shtml) — Sun, 01 Nov 2026 16:23:26 +0000