Abstract: An illumination device including a base, at least one LED light source and a diffusing element is provided. The base has a supporting plane. The LED light source disposed on the supporting plane has a light emitting surface substantially parallel to the supporting plane. The diffusing element disposed on the supporting plane to cover the at least one LED light source. The diffusing element includes a first portion and a second portion. The first portion located above the at least one LED light source. The second portion connected between the first portion and the base. An optical characteristic of the first portion is different from that of the second portion so that a non-continuous boundary is defined between the first portion and the second portion.

Abstract: An illumination device including a base, at least one LED light source and a diffusing element is provided. The base has a supporting plane. The LED light source disposed on the supporting plane has a light emitting surface substantially parallel to the supporting plane. The diffusing element disposed on the supporting plane to cover the at least one LED light source. The diffusing element includes a first portion and a second portion. The first portion located above the at least one LED light source. The second portion connected between the first portion and the base. An optical characteristic of the first portion is different from that of the second portion so that a non-continuous boundary is defined between the first portion and the second portion.

Abstract: A thermal responsive, water soluble copolymer is disclosed, which comprises the co-polymerization product of: (a) 0.5˜20 wt % of N-isopropyl acrylamide (NIPAAm); (b) 0.5˜20 wt % of 1-vinyl-2-pyrrolidinone (VPD); (c) 0.01˜10 wt % of acrylic acid (AA); and (d) 80˜90 wt % of acrylamide. The viscosity of.the co-polymerization product is adjustable by temperature. Moreover, phase-separating does not occur in the copolymer while temperature is changing and the structure as well as the fluidity are maintained, therefore, the copolymer of the present invention is suitable for the application of a micro-fluidic chip.

Abstract: A thermal responsive, water soluble copolymer is disclosed, which comprises the co-polymerization product of: (a) 0.5˜20 wt % of N-isopropyl acrylamide (NIPAAm); (b) 0.5˜20 wt % of 1-vinyl-2- pyrrolidinone (VPD); (c) 0.01˜10 wt % of acrylic acid (AA); and (d) 80˜90 wt % of acrylamide. The viscosity of.the co-polymerization product is adjustable by temperature. Moreover, phase-separating does not occur in the copolymer while temperature is changing and the structure as well as the fluidity are maintained, therefore, the copolymer of the present invention is suitable for the application of a micro-fluidic chip.