Field-Sequential LCD Gray-Scale Smoothing for Color Breakup

The patent removes the color filter layer from the liquid crystal display panel structure. Instead of using color filters to achieve color display, the invention employs a backlight module with multiple light-emitting devices of different colors that emit light sequentially to display different color sub-field images, thereby eliminating the light-absorbing color filter layer and reducing light loss and energy consumption.

The patent implements field sequential display by periodically switching the backlight module between different color light-emitting devices. The backlight module displays red, green, and blue sub-field images in sequential cycles, utilizing human visual persistence to perceive full-color images without requiring color filters, thus improving light transmission efficiency while maintaining color display capability.

The patent applies different gray scale processing strategies to different pixels based on their local characteristics. Target pixels that are likely to cause color breakup (those with high brightness or high contrast relative to neighbors) are identified and processed differently from non-target pixels. For target pixels, the gray scale is averaged with neighboring pixels to reduce abrupt transitions and eliminate color breakup, while non-target pixels maintain their original gray scale values.

The patent implements a feedback mechanism where the control circuit analyzes the initial gray scale values of pixels and their neighbors to determine which pixels are target pixels requiring gray scale adjustment. Based on this analysis, the control circuit dynamically adjusts the gray scale of target pixels by averaging with neighboring pixels, providing real-time correction to prevent color breakup while maintaining the benefits of filter-less display.