Color Mixing and Desaturation with Reduced Number of Converters,申请号US201314139725-传众专利搜索

Color Mixing and Desaturation with Reduced Number of Converters

申请公布号：US2014111114(A1)

申请号：US201314139725

申请日期：2013.12.23

申请公布日期：2014.04.24

申请人：

MINDSPEED TECHNOLOGIES, INC.

发明人：BAZZANI CRISTIANO;GOZZINI FABIO;NGUYEN STEVEN VAN

分类号：H05B37/02

主分类号：H05B37/02

摘要：A system is disclosed to automatically establish proper biasing for light sources in a color mixed projection system having multiple light sources which are active at the same time. Responsive to a feedback signal, a single DC-DC converter generates the bias voltage for the light sources. Comparators compare a headroom signal for each light source to a reference value to generate comparator output signals. The comparator output signals are processed by a channel selector and a digital filter/DAC module. The channel selector controls a switch to selectively provide and combine a headroom signal with an output of the digital filter/DAC module to create the feedback signal. By monitoring each headroom value, the bias voltage is adjusted, based on the feedback signal, until every headroom signal reaches the reference value thereby achieving sufficient biasing for every active light source in the color mixed projection system.