Industrial Technology Research Institute

Pei-Ying Chang

Tien-Fu Huang

Chen-Dao Shiao

Shi-Ing Huang

Chi-Hua Yu

Disclosed is a light-emitting device, including an LED light source and a light diffusion element. The light diffusion element, covering at least a part of the LED light source, is composed of a first polymer, a second polymer, or a blend of them. The first polymer has a larger crystal diameter than that of the second polymer. The first polymer is made of polypropylene or ethylene-propylene copolymer. The second polymer is made of polyethylene, polypropylene, or ethylene-propylene copolymer. A blend of certain ratios of the first and second polymer gives rise of an excellent material that has improved light diffusion. This material can be widely adopted to current light fixtures for its evenly distributed lighting and great brightness.

Light emitting device

A planting container is suitable for forming planting columns by using ones with the same structure three-dimensionally stacked. The planting columns are arranged around a center line parallel to the gravity direction to set up a planting tower. The planting container includes a bottom wall and a side wall. The side wall extends from the peripheral of the bottom wall and both walls define a containing space. The side wall has a planting opening communicating with the containing space. The side wall has a top end and a bottom end. When two containers with the same structure are three-dimensionally stacked by each other, the bottom end of the upper container engages with the top end of the lower container. The side wall laterally tilts towards the center line relatively to the bottom wall, so that the planting column tilts towards the adjacent column and tilts towards the center line.

Growing community of inventors

Taoyuan County, Taiwan

Pei-Ying Chang