Lightweight holographic near-eye display system with self-charging capability using solar energy

TL;DR

This paper introduces a lightweight holographic near-eye display that uses integrated solar cells and holographic optical elements to enable self-charging, reducing weight and allowing all-day wearable use.

Contribution

It presents a novel holographic near-eye display system that incorporates solar energy harvesting for self-charging, replacing traditional batteries and enhancing portability.

Findings

Successful integration of solar cells with holographic optical elements.

Demonstrated lightweight design suitable for daily wear.

Achieved continuous self-charging capability.

Abstract

Near-eye display plays an important role in emerging spatial computing systems, providing a distinctive visual effect of virtual-real fusion. However, its application for all-day wear is greatly limited by the bulky structure, energy expenditure, and continuous battery heating. Here, we propose a lightweight holographic near-eye display system that takes advantage of solar energy for self-charging. To achieve the collection of solar energy and near-eye display without crosstalk, holographic optical elements (HOE) are used to diffract sunlight and signal light into a common waveguide. Then, small-area solar cells convert the collected solar energy and power the system. Compact power supply components replace heavy batteries, contributing to the lightweight design. The simple acquisition of solar energy provides the system with sustainable self-charging capability. We believe that the lightweight design and continuous energy input solution will significantly promote the popularity of near-eye display in our daily lives.