KOYJ CO., LTD. is a Korea-based company mainly engaged in the liquid crystal display (LCD) black light unit (BLU) industry. The Company operates its business through three divisions: optical film coating division, light guide plates division and protection film division. Its optical film coating division is engaged in the manufacturing of optical functional films, hard coating films, adhesive protection films, cushion sheets and others. Its light guide plates division provides light guide plates used for LCD. Its protection film division is engaged in the manufacturing of protection films used for LCD panels. The Company distributes its products with domestic market and to overseas markets.