PDLC Display Light Distribution for Uniform In-Plane Luminance

The patent applies local quality by making the light guide plate have different thicknesses at different locations. The light guide plate is thicker at positions farther from the light source and thinner at positions closer to the light source. This variable thickness design compensates for the natural light decay, ensuring that areas receiving less light have more material to guide and distribute the light, thereby achieving uniform luminance across the display surface.

The patent implements local quality by varying the thickness of the light guide plate across different regions. Specifically, the light guide plate has greater thickness at the center and at positions farther from the light source, while being thinner at positions closer to the light source. This non-uniform thickness distribution is designed to compensate for the luminance differences that naturally occur in edge-lit displays, ensuring uniform brightness across the entire display surface.

The patent resolves this contradiction by abandoning uniform thickness in favor of a variable thickness design. The light guide plate is manufactured with different thicknesses at different locations, being thicker where light intensity is lower (farther from the light source) and thinner where light intensity is higher (closer to the light source). This design choice prioritizes luminance uniformity over manufacturing simplicity.