earticle

영어

A color overlapping method for increasing the brightness of projection systems using light-emitting diodes (LEDs) is proposed. The proposed approach drives the pulse width modulated signals of red, green, and blue LEDs. This color overlapping method synthesizes secondary colors of yellow and cyan from primary colors of red, green, and blue. By the proposed method, the brightness of the projected image is improved by about 30% compared to the conventional non-color-overlapping method in a projection system with LEDs.