| Summary: | 博士 === 國立清華大學 === 動力機械工程學系 === 101 === The purposes of this study are to enhance the light extraction efficiency of LED package, expand the view angle, in process color bin control and low cost method for lens type LED package.
A novel “Flip Glass Substrate” LED package structure is revealed. The transparent glass is employed as the substrate. This LED package architecture and process has three merits, (1) Large view angle (2) Color bin yield enhancement (like the concept of known-good-die), (3) Surface engineering for selective enhancement in efficiency or view angle.
The structure design and its corresponding process are designed for the manufacture of lens type LED package. The Dome-type or Crater-type silicone lenses are achieved by dispensing and embossing process rather than molding process. This LED package technology herein has three merits: (1) Enhanced the flexibility of lens type LED package designs, (2) Dome-type package design is used to enhance the efficiency, (3) Crater-type package design is used to enhance the view angle.
The characteristics of lens type LED package are studied. The variations in angular CCT and efficiency are experimentally discussed by considering the parameters of package structure、phosphor location and the applying method of phosphor.
|
|---|
