Displacement detection device with no hovering function and computer system including the same
First Claim
1. A displacement detection device, configured to perform contact operation or hovering operation on a working surface, the displacement detection device comprising:
- an image sensor configured to detect reflected light from the working surface and successively output image frames; and
a processing unit configured toidentify a contact mode or a hovering mode,calculate a first axis displacement and a second axis displacement according to the image frames,output the first axis displacement and the second axis displacement in full scale in the contact mode andoutput a first ratio of the first axis displacement and a second ratio of the second axis displacement in the hovering mode,wherein the second ratio is different from the first ratio, and the first ratio is 50%-100%.
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Abstract
A displacement detection device includes an image sensor, a processing unit and an output unit. The image sensor is configured to detect reflected light from a working surface to successively output image frames. The processing unit is configured to identify a hovering height and calculate a first axis displacement and a second axis displacement according to the image frames. The output unit is controlled by the processing unit to output a first ratio of the first axis displacement but not to output the second axis displacement when the hovering height is higher than a predetermined height.
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Citations
19 Claims
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1. A displacement detection device, configured to perform contact operation or hovering operation on a working surface, the displacement detection device comprising:
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an image sensor configured to detect reflected light from the working surface and successively output image frames; and a processing unit configured to identify a contact mode or a hovering mode, calculate a first axis displacement and a second axis displacement according to the image frames, output the first axis displacement and the second axis displacement in full scale in the contact mode and output a first ratio of the first axis displacement and a second ratio of the second axis displacement in the hovering mode, wherein the second ratio is different from the first ratio, and the first ratio is 50%-100%. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer system, comprising:
a displacement detection device, configured to perform hovering operation upon a working surface, the displacement detection device comprising; an image sensor configured to detect reflected light from the working surface and successively output image frames; a processing unit configured to identify a hovering mode and calculate a first axis displacement and a second axis displacement according to the image frames; and an output unit controlled by the processing unit and configured to output a hovering mode signal and output the first axis displacement and the second axis displacement in full scale when entering the hovering mode; and a host configured to take a first ratio of the first axis displacement as a first control value and a second ratio of the second axis displacement as a second control value when receiving the hovering mode signal, wherein the second ratio is different from the first ratio, and the first ratio is 50%-100%. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A displacement detection device, operated on a working surface, the displacement detection device comprising:
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an image sensor configured to detect reflected light from the working surface and successively output image frames; a processing unit configured to identify a hovering height and calculate a first axis displacement and a second axis displacement according to the image frames; and an output unit controlled by the processing unit and configured to output a first ratio of the first axis displacement but not to output the second axis displacement when the hovering height is higher than a predetermined height, wherein the first ratio is 50%-100%. - View Dependent Claims (16, 17, 18, 19)
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Specification