An improved rotor design for hammermills. A color filter forming region and the color filter non-forming regions are formed within a lighting region which is visible to a viewer in the inside of one pixel. The positive branch includes a potentially separately actuated third switch connected in parallel with the first switch and in series with the consumer and second switch, as well as a second load connected in parallel with the first switch and in series with the consumer and the second switch. The output buffer ring oscillator includes a plurality of inverters connected in a series.