Micro-LED Pixel Structure With Wavelength Conversion Layers

The light transmissive layer is divided into multiple sub-layers (first light transmissive layer, second light transmissive layer, third light transmissive layer) with different functions. Each layer is positioned at specific heights relative to the light emitting element, creating a segmented structure that optimizes light extraction and wavelength conversion efficiency while maintaining color uniformity across the display.

The patent introduces vertical dimensionality by positioning light transmissive layers at different heights above the light emitting element. The first light transmissive layer is at a first height, the second light transmissive layer is at a second height above the first, and the third light transmissive layer is at a third height above the second. This multi-level vertical arrangement enables sophisticated light management in the vertical dimension, improving light emission efficiency and color uniformity without planar complexity.

Different light transmissive layers are positioned at different vertical locations to perform specialized functions. The first light transmissive layer handles primary light transmission, the second light transmissive layer incorporates wavelength conversion material for color transformation, and the third light transmissive layer provides additional color enhancement or filtering. This local differentiation of layer qualities enables precise color uniformity control while managing structural complexity through functional specialization.

The light transmissive layer structure employs composite material design by combining multiple layers with different optical properties. Each layer may contain different wavelength conversion materials or have different refractive indices, creating a composite structure that achieves superior color uniformity and gamut. The composite approach allows optimization of each layer's material properties for its specific function rather than using a single homogeneous material.