Abstract
Field sequential color (FSC) LCD without color filters has been proposed to enhance light efficiency and color gamut. However, a well-known intrinsic visual artifact, color breakup, is perceived when a relative velocity exists between the object on the screen and the observer's eyes. A Stencil-FSC method therefore was proposed recently which cumulates major color information to the first color sub-frame and therefore suppresses the color breakup. However, the display luminance is lower than that of conventional LCDs. To solve this problem, we extend the Stencil-FSC method to display high dynamic range (HDR) images. Its first step is to scale HDR RGB signals to baseline RGB dynamic range. Afterward, performs the original Stencil-FSC method to initialize all setting. Third, checks each backlight color zone of the R, G, B sub-frames to see if they are free for changing their original primaries to RGB mixing primaries. Forth, determines the color-mixing state of the 'free' primaries based on the extra HDR RGB signals. Finally, calculates the LC signals of the new color-mixing primaries. This algorithm would upgrade a FSC LCD as HDR display.
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