Liquid Crystal Display Light Guide Plate Polarization Management

The patent converts the harmful effect of polarized light absorption by polarizing plates into a beneficial system by introducing a polarized light separating body that separates non-polarized light into two linearly polarized light components. One component is transmitted and used directly, while the other reflected component is reused through optical elements, transforming the previously wasted light into useful illumination and reducing the need for additional light sources.

The patent recovers light that would otherwise be lost by implementing a polarized light separating body combined with optical elements (such as light scattering bodies, diffusion sheets, or brightness enhancement films) that redirect and reuse the reflected polarized light component back toward the liquid crystal panel, thereby recovering valuable light energy that would normally be discarded.

The patent merges the polarized light separating body with existing optical elements already present in the liquid crystal display structure, such as light scattering bodies, diffusion sheets, or brightness enhancement films. This integration allows the polarized light separation function to be combined with existing components, reducing overall structural complexity while maintaining high light utilization efficiency.

The patent designs the optical system so that existing optical elements serve multiple functions: they not only perform their original functions (light scattering, diffusion, brightness enhancement) but also work in conjunction with the polarized light separating body to redirect and reuse reflected polarized light. This multi-functionality reduces the need for separate dedicated components.

The patent segments the optical system into distinct functional components: a polarized light separating body and separate optical elements (light scattering bodies, diffusion sheets, brightness enhancement films). This segmentation allows each component to be manufactured independently using standard processes, avoiding the manufacturing complexity of forming polarized light separating layers on inclined surfaces of columnar prism arrays.

The patent introduces an intermediary approach by using a polarized light separating body that can be integrated with existing optical elements, rather than directly forming complex structures on inclined surfaces. This intermediary integration method simplifies manufacturing while achieving the desired light utilization efficiency.