Light Guide Plate Light Adjusting Layer Uniform Illumination

A light adjusting layer is introduced as an intermediary between the point light sources (LEDs) and the light guide plate. This layer contains light scattering particles or has a specific refractive index that differs from the light guide plate, enabling it to modify the light distribution pattern. The light adjusting layer converts the non-uniform point light source distribution into uniform area light distribution across the display panel, resolving the contradiction between ease of manufacturing with simple LED arrangement and achieving uniform illumination.

The light adjusting layer is positioned only in specific regions where light adjustment is needed, such as near the light incident surface or at particular zones of the light guide plate, rather than uniformly across the entire structure. The layer may have localized rough interfaces or scattering particles concentrated in areas requiring light redistribution. This localized approach achieves the necessary light uniformity while minimizing the addition of structural complexity.

Instead of using a light absorbing layer that would cause energy loss, the invention changes the optical parameters of the light adjusting layer by incorporating light scattering particles with specific refractive indices or by controlling the layer's thickness and material properties. This allows the layer to redirect and redistribute light uniformly across the display panel without absorbing significant light energy, thus maintaining both light uniformity and energy efficiency.