Tracking device and electronic device with improved work surface adaptability
AssigneePixart Imaging Inc.
InventorsHui-Hsuan Chen, Cheng-Lin Yang, Tzu-Yu Chen
Life of this patent
Estimating the term…
Abstract
A tracking device including an image sensor, a light source and a processor is provided. The image sensor senses reflected light or scattered light formed by the light source illuminating a work surface. The processor calculates a trace of the tracking device according to one of the reflected light and the scattered light that generates more apparent image features so as to increase the adaptable work surfaces.
Claims15
A tracking device, configured to detect displacement with respect to a work surface, the tracking device comprising:
- an image sensor configured to output image frames;
- a partially reflective plate;
- a first light source configured to emit light toward the work surface to generate scattered light that impinges on the image sensor without passing through the partially reflective plate;
- a second light source configured to emit light toward the partially reflective plate to generate partial reflected light perpendicular to the work surface, and the partial reflected light impinges on the image sensor after being reflected by the work surface;
- and
- a processor configured to compare image features of the image frames being captured when the first and second light sources are lighting, and turn on, in calculating the displacement, one of the first and second light sources whose associated image frame has a better image feature.
An electronic device, configured to be operated on a work surface, the electronic device comprising:
- a first light source, configured to emit light at a tilt angle and toward the work surface to generate a main reflected light beam;
- a partially reflective plate;
- a second light source, arranged adjacent to the partially reflective plate in a transverse direction;
- an image sensor, not arranged at a path of the main reflected light beam of the first light source and arranged above the partially reflective plate in a longitudinal direction;
- and
- a processor configured to compare image features of image frames captured by the image sensor when the first and second light sources are lighting, and turn on, in calculating displacement, one of the first and second light sources whose associated image frame has a better image feature.
Dependencies are inferred from the claim text.