AUGMENTED REALITY DEVICE INCLUDING VARIABLE FOCUS LENSES AND OPERATING METHOD THEREOF

Smart overview of the Invention

An augmented reality (AR) device is designed with a variable focus lens system that enhances user experience by dynamically adjusting the focal region based on eye metrics. The device incorporates an eye tracking sensor that emits and receives light to detect various feature points on the user's eyes. This data is used to calculate critical parameters such as eye relief, gaze point, and interpupillary distance, which collectively determine the optimal focal region of the lens.

Technical Components

The AR device includes an infrared (IR) light source and camera within its eye tracking sensor, which work together to identify glint feature points from reflected IR light. These feature points help in assessing the distance between the user's eye and the variable focus lens, known as eye relief. The processor in the device uses this information to adjust the focal region accordingly, ensuring clear vision for both real-world objects and virtual images.

Operational Method

The method of operation involves detecting feature points from reflected light, obtaining eye relief data, and determining gaze convergence points. By analyzing these parameters, the device calculates the ideal position for the focal region of the variable focus lens. This ensures that the visual axis aligns correctly with the focal region, reducing user fatigue and enhancing image quality.

Advanced Features

The device's IR system comprises multiple IR LEDs and photodiodes strategically positioned on the lens frame. These components help refine measurements such as glint pattern size and distances between feature points. Additionally, by capturing images of the user's eyes at different rotation angles, the processor can further fine-tune eye relief calculations, improving alignment precision.

Benefits

By incorporating these advanced technologies, the AR device offers significant benefits including improved vision correction through precise focal adjustments and enhanced user comfort by minimizing visual strain. The automatic determination of focal regions based on comprehensive eye metrics ensures a seamless integration of virtual imagery with real-world views, enriching user interaction with augmented reality environments.