Reflective Display Light Guide Microstructures for Uniform Emission

The patent changes the geometric parameters of the optical microstructures from arc-shaped or cone-shaped to polyhedral shapes with specific included angles (45-90 degrees). This parameter change in the microstructure geometry fundamentally alters the light reflection characteristics, enabling uniform light distribution near the light entry side while maintaining overall light emission uniformity across the display panel.

The patent applies different optical microstructure designs to different regions of the light guide plate. Specifically, the polyhedral microstructures with controlled included angles are strategically positioned to address the specific lighting requirements near the light entry side, while other regions can have varying densities or configurations to achieve overall uniformity. This localized optimization resolves the contradiction between global uniformity and local uniformity near the light source.

The patent segments the optical microstructures into discrete polyhedral units with specific geometric characteristics (included angles between 45-90 degrees). By dividing the light guide plate into regions with systematically arranged polyhedral microstructures, the design achieves uniform light emission while maintaining manufacturability. The segmentation into standardized polyhedral shapes simplifies manufacturing compared to continuous arc-shaped or cone-shaped structures.

The patent simplifies the overall design by changing from complex curved geometries (arc-shaped or cone-shaped) to polyhedral geometries with discrete included angles. This parameter change reduces manufacturing complexity while achieving the desired optical performance. The polyhedral shapes with specific angle ranges (45-90 degrees) are easier to manufacture with standard fabrication processes compared to precise curved surfaces.