| Title |
A Study on the Improvement of Optical Characteristics and Color Uniformity of an LED Package by Controlling TiO2 Dispersion Stability |
| Authors |
Ki-Tae Lim ; Wan-Ho Kim ; In-Seon Yeo |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2017.31.11.032 |
| Keywords |
White LED Package ; Color Uniformity ; TiO2 Surface Modification ; Dispersion Stability |
| Abstract |
In this study, the carbon length of the TiO2 surface property was controlled by using other surface materials in order to improve the light characteristics and color uniformity of the white LED. The surface physical properties of the TiO2 particles were adjusted in the same manner as the physical properties of the silicone encapsulating material to ensure the dispersion stability. and The improved dispersion stability enabled to prevent the precipitation and aggregation of the particles which enhances the scattering efficiency of TiO2. As a result of the measurement of optical characteristics, total luminous flux improvement of 3 to 8% occurred in the LED package manufactured using the surface modified TiO2, and deviation of color uniformity due to angle could be improved. |