| dc.description.abstract | With the emergence of the Metaverse concept, related industries have flourished, and virtual reality technology provides a means of communication between the real and virtual worlds. Augmented Reality (AR) smart glasses, incorporating waveguide-integrated components and microLED-based projection displays, are a key focus of current technological development. This study establishes an evaluation algorithm based on the optical distribution function theory for assessing the optical quality of displays, including contrast ratio and system total energy efficiency. By utilizing simulation software and the developed algorithm, the microLED-based projection display is efficiently optimized for different structural configurations and parameters within an surface relief grating (SRG)-type waveguide system employing the exit pupil expander (EPE) technique. The relative optimal system total energy efficiency is determined. Analysis of simulation software results reveals that the display architecture, with a black matrix array, micro-lens array, and aperture matrix, effectively suppresses optical crosstalk, improving the contrast ratio from 5:1 to infinity. By controlling the angular emission distribution characteristics of the waveguide system, display structural parameters modulate the energy of the light source within the effective angular range, In the case of a dual-layer micro-lens array architecture with substrate thicknesses of 1.42 ?? and 2.33 ??, the total energy efficiency was increased from 1.26% to 2.63%, resulting in a 52% improvement. The proposed algorithm technique was validated in different implementation scenarios, and an optimization strategy with weighted distribution characteristics was determined through a software optimization module. In the case of a single-layer doublet micro-lens array architecture, the total energy efficiency was increased from 2.44% to 2.57%, resulting in a 5% improvement. Finally, the feasibility of EPE technology and the uniformity of the optical system image are discussed. | en_US |