Reverse light path channel waveguide assembly, AR glasses and brightness adjusting method thereof

Abstract

The invention discloses a reverse light path channel waveguide assembly, AR glasses and a brightness adjusting method thereof. The reverse light path channel waveguide assembly comprises a waveguide body, and the waveguide body is provided with a forward light path channel and a reverse light path channel; an imaging device used for shooting a human eye state image is arranged on the outer side of the waveguide body; the forward light path channel comprises a first entrance pupil area arranged above the waveguide body, a pupil expanding area located at the same horizontal height as the first entrance pupil area, and a first exit pupil area arranged below the pupil expanding area; the reverse light path channel comprises a second entrance pupil area which is arranged in the first entrance pupil area and is close to the first entrance pupil area, and a second exit pupil area which is arranged below the first entrance pupil area. According to the embodiment of the invention, the imaging device is used for positioning the fixation point of the human eyes, so that eyeball tracking is realized; meanwhile, the size change of the pupils is measured, so that the light intensity of a picture displayed in the AR glasses can be automatically adjusted.

Description

technical field [0001] The invention relates to the field of optical display technology, in particular to a reverse optical path channel waveguide assembly, AR glasses and a brightness adjustment method thereof. Background technique [0002] As people have higher and higher expectations for the use experience of AR glasses, the display brightness, screen position, imaging position and quality will affect the visual experience of the human eye. Therefore, how to improve the display quality of AR glasses and increase the use of functions can improve The direction of AR glasses experience. [0003] In the design and manufacture of AR glasses, eye tracking is generally used to locate the point of gaze of a person. Eye tracking technology is to calculate the characteristics of the eye image in real time through a customized eye tracking sensor, and then calculate the user's gaze point and the direction of the visual axis. This enables real-time foveated rendering, simulating th...

AI Technical Summary

Problems solved by technology

However, what the ambient light sensor senses is not necessarily the brightness of the environment seen by the human eye, or it may be that the bright light outside the human eye's line of sight directly shines on the ambient light sensor or the glass of the glasses. At this time, the brightness adjusted according to the ambient light sensor There is a large difference in brightness from the ambient light, and the virtual picture and the real scene cannot be well integrated

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