Total reflection based compact near-eye display device with large field of view

A compact near-eye display device with a large field of view angle based on total reflection, comprising:

• a total reflection prism for totally reflecting and conducting light emitted by an image source for one or more times,
• a near-eye refractive component for enlarging the image after one or more reflections of the light, and
• a gap layer exists between the total reflection prism and near-to-eye refractive component,
• wherein the near-to-eye refractive component is located between the eyes and the total reflection prism, closed to the eyes,
• wherein the gap layer contains a substance with a refractive index lower than that of the total reflection prism, so that light can be totally reflected and transmitted on the inner surface of the total reflection prism,
• wherein the near-to-eye diopter adopts a polarized bifocal lens, a refractive reflective diopter or a polarized double reflective diopter, to achieve different focal lengths for light with different polarizations, the focal length for internal display light is positive short focus, and the focal length for external ambient light is nearly infinite,
• wherein the near-to-eye refractive component allows external light to pass through without diopter, and the secondary reflection surface is semi-reflective, so that a human eye can see external environment through the near-to-eye refractive component and the total reflection prism while seeing the displayed image clearly, thus realizing the semi-transparent display effect of augmented reality.