Head-mounted electronic device and image projection system thereof

Abstract

This invention provides a head-mounted electronic device and its image projection system. The image projection system includes a light source providing module, a first deflection module, a relay optical module, a second deflection module, and a beam reflection module. The first deflection module is configured to receive an incident light beam provided by the light source providing module and reflect the incident light beam into a first reflected beam. The relay optical module is configured to receive the first reflected beam and guide the first reflected beam into a predetermined guiding beam. The second deflection module is configured to receive the predetermined guiding beam formed by the guidance of the relay optical module and reflect the predetermined guiding beam into a second reflected beam. The beam reflection module is configured to receive the second reflected beam formed by the reflection of the second deflection module and reflect the second reflected beam into a projected beam. In this way, the originally limited or small exit pupil can be expanded to a desired or wider image viewing area.

Claims

1. An image projection system, comprising: A light source providing module is configured to provide an incident light beam; A first deflection module configured to receive the incident light beam provided by the light source providing module and reflect the incident light beam into a first reflected beam; a relay optical module configured to receive the first reflected beam formed by the reflection through the first deflection module and guide the first reflected beam into a predetermined guiding beam; a second deflection module configured to receive the predetermined guiding beam formed by the guidance through the relay optical module and reflect the predetermined guiding beam into a second reflected beam; and a beam reflection module configured to receive the second reflected beam formed by the reflection through the second deflection module and reflect the second reflected beam into a projected beam.

2. The image projection system as described in claim 1, wherein, The image projection system is configured within a structural cavity or vacuum cavity; wherein the relay optical module is configured as a multi-lens group or a single lens; wherein, when the relay optical module is configured as the multi-lens group, the relay optical module includes a first lens group and a second lens group corresponding to the first lens group, the first lens group is configured to be fixedly or movably disposed between the first deflection module and the second lens group, the second lens group is configured to be fixedly or movably disposed between the first lens group and the second deflection module, and the first lens group and the second lens group optically cooperate with each other to collimate, focus, or correct aberrations of the first reflected beam; Wherein, when the relay optical module is configured as the multi-lens group, the first lens group is configured to receive the first reflected beam formed by reflection through the first deflection module and guide the first reflected beam into a first guiding beam, and the second lens group is configured to receive the first guiding beam formed by conversion through the first deflection module and guide the first guiding beam into a second guiding beam as the predetermined guiding beam; wherein, when the relay optical module is configured as the single lens, the relay optical module includes a light reflecting lens, the light reflecting lens is configured on the same side of the first deflection module and the second deflection module, for collimating, focusing or aberration correcting the first reflected beam; wherein, when the relay optical module is configured as the single lens, the single lens is configured to receive the first reflected beam formed by reflection through the first deflection module and reflect the first reflected beam into the predetermined guiding beam. The beam reflection module is configured as a curved mirror or a flat mirror to define the imaging quality and field of view of the projected beam.

3. The image projection system as described in claim 1, wherein, The first deflection module is configured to dynamically adjust the beam projection angle through dynamic deflection, thereby dynamically tracking the user's eyeball; wherein, the second deflection module is configured to project an image beam through rapid scanning, thereby accurately providing a planar image with a predetermined field of view angle; wherein, the first deflection module is configured as a microelectromechanical system (MEMS) scanning mirror, for dynamically adjusting the reflection angle of the first reflected beam, thereby dynamically adjusting the incident angle of the projected beam onto the eyeball; wherein, the second deflection module is configured as a MEMS scanning mirror, for sequentially projecting the second reflected beam onto the beam reflection module to form a plurality of pixels, thereby forming the planar image composed of the plurality of pixels on the beam reflection module.

4. The image projection system as described in claim 1, wherein, The first deflection module is configured to project an image beam through rapid scanning, thereby accurately providing a planar image with a predetermined field of view angle; wherein the second deflection module is configured to dynamically adjust the beam projection angle through dynamic deflection, thereby dynamically tracking the user's eyeball; wherein the first deflection module is configured as a microelectromechanical system (MEMS) scanning mirror to sequentially project the first reflected beam onto the relay optical module to form a plurality of pixels, thereby forming the planar image composed of the plurality of pixels on the relay optical module; wherein the second deflection module is configured as a MEMS scanning mirror to dynamically adjust the reflection angle of the second reflected beam, thereby dynamically adjusting the incident angle of the projected beam onto the eyeball.

5. A head-mounted electronic device configured to use an image projection system, characterized in that the image projection system comprises: A light source providing module is configured to provide an incident light beam; A first deflection module configured to receive the incident light beam provided by the light source providing module and reflect the incident light beam into a first reflected beam; a relay optical module configured to receive the first reflected beam formed by the reflection through the first deflection module and guide the first reflected beam into a predetermined guiding beam; a second deflection module configured to receive the predetermined guiding beam formed by the guidance through the relay optical module and reflect the predetermined guiding beam into a second reflected beam; and a beam reflection module configured to receive the second reflected beam formed by the reflection through the second deflection module and reflect the second reflected beam into a projected beam.

6. The head-mounted electronic device as claimed in claim 5, wherein, The image projection system is configured within a structural cavity or vacuum cavity; wherein the relay optical module is configured as a multi-lens group or a single lens; wherein, when the relay optical module is configured as the multi-lens group, the relay optical module includes a first lens group and a second lens group corresponding to the first lens group, the first lens group is configured to be fixedly or movably disposed between the first deflection module and the second lens group, the second lens group is configured to be fixedly or movably disposed between the first lens group and the second deflection module, and the first lens group and the second lens group optically cooperate with each other to collimate, focus, or correct aberrations of the first reflected beam; Wherein, when the relay optical module is configured as the multi-lens group, the first lens group is configured to receive the first reflected beam formed by reflection through the first deflection module and guide the first reflected beam into a first guiding beam, and the second lens group is configured to receive the first guiding beam formed by conversion through the first deflection module and guide the first guiding beam into a second guiding beam as the predetermined guiding beam; wherein, when the relay optical module is configured as the single lens, the relay optical module includes a light reflecting lens, the light reflecting lens is configured on the same side of the first deflection module and the second deflection module, for collimating, focusing or aberration correcting the first reflected beam; wherein, when the relay optical module is configured as the single lens, the single lens is configured to receive the first reflected beam formed by reflection through the first deflection module and reflect the first reflected beam into the predetermined guiding beam. The beam reflection module is configured as a curved mirror or a flat mirror to define the imaging quality and field of view of the projected beam.

7. The head-mounted electronic device as claimed in claim 5, wherein, The first deflection module is configured to dynamically adjust the beam projection angle through dynamic deflection, thereby dynamically tracking the user's eyeball; wherein, the second deflection module is configured to project an image beam through rapid scanning, thereby accurately providing a planar image with a predetermined field of view angle; wherein, the first deflection module is configured as a microelectromechanical system (MEMS) scanning mirror, for dynamically adjusting the reflection angle of the first reflected beam, thereby dynamically adjusting the incident angle of the projected beam onto the eyeball; wherein, the second deflection module is configured as a MEMS scanning mirror, for sequentially projecting the second reflected beam onto the beam reflection module to form a plurality of pixels, thereby forming the planar image composed of the plurality of pixels on the beam reflection module.

8. The head-mounted electronic device as claimed in claim 5, wherein, The first deflection module is configured to project an image beam through rapid scanning, thereby accurately providing a planar image with a predetermined field of view angle; wherein the second deflection module is configured to dynamically adjust the beam projection angle through dynamic deflection, thereby dynamically tracking the user's eyeball; wherein the first deflection module is configured as a microelectromechanical system (MEMS) scanning mirror to sequentially project the first reflected beam onto the relay optical module to form a plurality of pixels, thereby forming the planar image composed of the plurality of pixels on the relay optical module; wherein the second deflection module is configured as a MEMS scanning mirror to dynamically adjust the reflection angle of the second reflected beam, thereby dynamically adjusting the incident angle of the projected beam onto the eyeball.

9. An image projection system, comprising: The system comprises a light source providing module, a first deflection module, a second deflection module, a relay optical module, and a beam reflecting module, wherein the light source providing module, the first deflection module, the relay optical module, the second deflection module, and the beam reflecting module are configured on the same optical path; wherein, one of the first deflection module and the second deflection module is configured to project an image beam through rapid scanning, thereby accurately providing a planar image with a predetermined field of view angle; wherein, the other of the first deflection module and the second deflection module is configured to dynamically adjust the beam projection angle through dynamic deflection, thereby dynamically tracking the user's eyeball; wherein, the relay optical module is configured to collimate, focus, or correct aberrations in the beam.

10. The image projection system as claimed in claim 9, wherein, The light source providing module is configured to provide an incident light beam; wherein, the first deflection module is configured to receive the incident light beam provided by the light source providing module and reflect the incident light beam into a first reflected beam; wherein, the relay optical module is configured to receive the first reflected beam formed by the reflection through the first deflection module and guide the first reflected beam into a predetermined guiding beam; wherein, the second deflection module is configured to receive the predetermined guiding beam formed by the guidance through the relay optical module and reflect the predetermined guiding beam into a second reflected beam; wherein, the beam reflection module is configured to receive the second reflected beam formed by the reflection through the second deflection module and reflect the second reflected beam into a projection beam; wherein, the image projection system is configured within a structural cavity or a vacuum cavity; wherein, the relay optical module is configured as a multi-lens group or a single lens. When the relay optical module is configured as the multi-lens group, the relay optical module includes a first lens group and a second lens group corresponding to the first lens group. The first lens group is configured to be fixedly or movably disposed between the first deflection module and the second lens group. The second lens group is configured to be fixedly or movably disposed between the first lens group and the second deflection module. The first lens group and the second lens group are optically coordinated with each other to collimate, focus, or correct aberrations of the first reflected beam. When the relay optical module is configured as the multi-lens group, the first lens group is configured to receive the first reflected beam formed by reflection from the first deflection module and guide the first reflected beam into a first guiding beam. The second lens group is configured to receive the first guiding beam formed by conversion from the first deflection module and guide the first guiding beam into a second guiding beam that serves as the predetermined guiding beam. Wherein, when the relay optical module is configured as the single lens, the relay optical module includes a light-reflecting lens, which is disposed on the same side of the first deflection module and the second deflection module, for collimating, focusing, or correcting aberrations of the first reflected beam; wherein, when the relay optical module is configured as the single lens, the single lens is configured to receive the first reflected beam formed by reflection through the first deflection module, and reflect the first reflected beam into the predetermined guiding beam; wherein, the beam reflection module is configured as a curved reflector or a plane reflector, for defining the imaging quality and field of view of the projected beam.

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