Light Guide Plate Recesses Prevent Light Leakage

The patent applies local quality by creating recesses at specific locations on the inclined surface where light leakage and hot spots occur. These recesses modify the local optical properties without changing the overall wedge shape, allowing light to be redirected properly while maintaining the thin profile. The recesses are strategically positioned to address local problems rather than redesigning the entire structure.

The patent introduces a new dimension by adding recesses that create micro-cavities on the inclined surface. This dimensional modification allows light that would normally leak out to be redirected through multiple reflections within the recess structures, effectively adding an optical path dimension that prevents premature light exit while maintaining the thin overall thickness.

The inclined surface is segmented into multiple regions by creating discrete recesses at specific locations rather than modifying the entire surface. This segmentation approach allows light control at problem areas while leaving other regions simple, balancing improved light efficiency with manageable structural complexity.

The patent modifies specific geometric parameters (depth, width, and position of recesses) to optimize light control. By carefully controlling these parameters, the design achieves high light efficiency while keeping the recess structures simple enough for practical manufacturing, thus managing device complexity.