Coretronic Corporation

Yi Hung

Chih-Wei Shih

Chuan-Te Cheng

Chung-Ting Wei

Meng-Hsuan Lin

A HMD device including a display, a first waveguide element and a second waveguide element is provided. The first waveguide element comprises a first light incident surface, a first light emerging surface and a plurality of first light splitting elements. An image beam is incident to the first waveguide element through the first light incident surface, and leaves the first waveguide element through the first light emerging surface. The second waveguide element comprises a second light incident surface, a second light emerging surface and a plurality of second light splitting elements. The image beam is incident to the second waveguide element through the second light incident surface. The image beam leaves through the second light emerging surface and is projected to the projection target. A reflectivity of the None of the second light splitting elements is smaller than or equal to a reflectivity of the (N+1)one of the second light splitting elements.

Head-mounted display device

A projection apparatus including an image device and an illumination system is provided. The image device is configured to convert an illumination beam into an image beam. The illumination system includes an illumination light source, a diffusion device and a light uniform device. The illumination light source provides the illumination beam. The illumination beam is transmitted to the image device through the diffusion device and the light uniform device sequentially. The image beam leaves the projection apparatus and converges at a stop. The stop is located outside the projection apparatus. The image beam on the stop has desirable uniformity of an energy intensity distribution.

Projection apparatus

A HMD device includes an illumination system, a display device, a lens module and a waveguide system. The illumination system includes an aperture stop. The display device converts an illumination beam into an image beam. The waveguide system guides the image beam, and projects the image beam to a projection target. The waveguide system includes a first waveguide element and a second waveguide element. The image beam is projected to the projection target through the lens module, the first and the second waveguide elements, and is converged to a first stop within the first waveguide element. The first stop is located in the first waveguide element. The image beam is projected to a second stop outside the second waveguide element. The second stop is located at the projection target. The illumination beam is converged to a third stop within the illumination system. The aperture stop is located at the third stop.

A HMD device including a display device, a first waveguide element and a second waveguide element is provided. An image beam is projected to a projection target. The first waveguide element includes a plurality of first light splitting elements. The image beam coming from the display device is incident to the first waveguide element through a first light incident surface. The image beam is convergent to a first stop in the first waveguide element. The image beam leaves the first waveguide element through the first light exiting surface. The first stop is located in the first waveguide element. The second waveguide element includes a plurality of second light splitting elements. The image beam coming from the first waveguide element is incident to the second waveguide element through the second light incident surface.

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Hsin-Chu, Taiwan

Yi Hung