Projector and method for acquiring coordinate of bright spot
AssigneeLenovo (Beijing) Limited
InventorsShaoping Peng, Yiqiang Yan, Zifeng Hou, Bo Liu
Life of this patent
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Abstract
A projector for acquiring a coordinate of a bright spot includes a half transparent and half reflecting mirror (22), an imaging device (24), and a processing system (25). The half transparent and half reflecting mirror (22) is provided on a light path between the light source (21) and the zooming system (23). The imaging device (24) captures an external light ray reflected by the half transparent and half reflecting mirror (22). The processing system (25) acquires the coordinate of the bright spot according to the image of the image of the bright spot captured by the imaging device.
Claims13
A projector for acquiring a coordinate of a bright spot, comprising:
- a light source configured to project and a zooming system, wherein a light ray emitted from the light source is projected onto a projection area via the zooming system;
- a half transparent and half reflecting mirror provided on a light path between the light source and the zooming system, for reflecting an external light ray, which is reflected from the projection area and then incident on the half transparent and half reflecting mirror via the zooming system, wherein the external light ray comprises a projection image and a bright spot image of the bright spot incident on the projection image;
- an imager configured to capture the external light ray reflected by the half transparent and half reflecting mirror;
- and
- a processor configured to acquire the coordinate of the bright spot according to the bright spot image captured by the imager.
A method for acquiring a coordinate of a bright spot, comprising:
- providing a light source and a zooming system, wherein a light ray emitted from the light source is projected onto a protection area via the zooming system;
- providing a half transparent and half reflecting mirror on a light path between the light source and the zooming system, for reflecting an external light ray, which is reflected from the projection area and then incident on the half transparent and half reflecting mirror via the zooming system, wherein the external light ray comprises a projection image and a bright spot image of the bright spot incident on the projection image;
- capturing the external light ray reflected by the half transparent and half reflecting mirror;
- and
- acquiring the coordinate of the bright spot, according to the captured bright spot image.
Dependencies are inferred from the claim text.