In order to evaluate the impact of phosphor layer's geometry on the optical properties of high power white light-emitting diode(LED),the yellow phosphor coating processes which are used to obtain white light through blue InGaN LED are studied.The white LED samples are obtained through phosphor resin coating in a wide area,phosphor resin coating on the die surface and phosphor resin conformal distribution respectively.The optical properties of white LED samples are tested using integrating sphere and angle t...