OLED Display Panel Light Filters Eliminate Color Separation

The light filter is divided into multiple sub-light filters (first, second, and third sub-light filters) with different colors arranged in an array. Each sub-light filter has specific edge length ratios (second edge length less than or equal to third edge length) to control diffraction. By segmenting the light filter into color-specific components with optimized geometries, the patent reduces color separation while maintaining light emission control in screen-off state.

Different sub-light filters are designed with different local properties (colors and edge length ratios) to address the diffraction issue locally. The first sub-light filter (red), second sub-light filter (green), and third sub-light filter (blue) each have optimized edge length ratios suitable for their respective wavelengths, providing localized quality control to eliminate color separation phenomena.

Multiple sub-light filters of different colors (red, green, blue) are merged into a single integrated light filter structure arranged in an array. This combining approach allows the mixed reflected light from different color sub-filters to form white light, eliminating color separation while maintaining a unified filter component that can be manufactured as a single element.

The light filter structure serves multiple functions simultaneously: it filters light to control emission, mixes reflected light of different colors to form white light, and eliminates color separation phenomena. By designing the light filter with an array of multi-color sub-filters, the patent achieves universal functionality that addresses both light control and color uniformity requirements.