Adaptive color conversion algorithm to achieve both high brightness and wide color gamut
We present a new color conversion algorithm for the new projector with the forth liquid crystal panel which controls the yellow light separately from RGB lights of the three-LCD system. This algorithm controls the volume of yellow light and corrects distorted color based on image analysis, and thus achieves high brightness and wide color gamut.
72.2: Invited Paper: Color Processing for Wide Gamut and Multi‐Primary Displays
Until recently most displays were based on CRT. Since all CRTs have similar color characteristics, RGB data represent colors tuned according to the CRT properties, and thus no processing is required at the display end. The emergence of wide gamut displays changed this situation, since rendering of RGB data on wide gamut displays without suitable processing would result in unnatural colors. In the article we discuss color processing for wide gamut displays, and describe algorithms and methods for gamut mapping and multi‐primary conversion.
An analytical approach to the design of electrodes in high-power, fast-transverse-flow CO2 lasers
Abstract Usually, the design of the electrodes of fast-transverse-flow CO 2 lasers relies more on experimental data than on theoretical analysis. Traditional systems sustain a stable, high-power discharge but the current distribution generates a peaked, non-uniform small-signal-gain pattern. We present a theoretical model suitable for the design of electrodes that achieves a quasi uniform gain distribution. The analysis, based on a two-temperature model and the gas-transport equations, computes the electron density that supports a flat gain pattern. Combining the desired electron density with the electron-balance equations, the model determines the required electric field. The results were used to design a new set of electrodes for a home-made fast transverse flow CO 2 laser. A stable, large volume discharge ( 4 × 8 × 90 cm 3 ) with very good uniformity was obtained. The resulting gain distribution was registered in a bi-dimensional map. The peak gain rose from 1.2 m - 1 , attained with the old electrode set, to 1.6 m - 1 with the new one and the gain showed a homogeneous profile.