Microcavity Display Substrate Resolving Color Gamut and PPI Limits

The patent applies local quality by creating microcavity structures with different cavity lengths at different locations (sub-regions) of the display substrate. Each microcavity is designed with specific dimensions to emit specific wavelengths, enabling different colors to be emitted from different local areas. This resolves the contradiction by achieving wide color gamut through localized wavelength control rather than relying on limited color film substrates.

The patent changes physical parameters by varying the cavity length of microcavity structures to control emission wavelength. By adjusting the cavity length parameter, the device can emit different wavelengths of light corresponding to different colors. This parameter-based control enables the display substrate to achieve NTSC color gamut coverage without being constrained by traditional color film limitations.

The patent replaces the mechanical fine metal mask system with a microcavity-based optical system. Instead of using complex metal masks to define pixels and control light emission, the invention uses microcavity structures that inherently control wavelength and color through their physical dimensions. This substitution eliminates the manufacturing constraints of fine metal masks while achieving high PPI through the microcavity array configuration.

The patent uses parameter changes in microcavity dimensions to control display characteristics. By varying cavity length, width, and other geometric parameters, the system can control emission wavelength and intensity for each pixel location. This parameter-based approach replaces the need for complex fine metal mask alignment and fabrication, enabling high PPI displays with simplified manufacturing processes.