Virtual projecting input system and input detecting method thereof
First Claim
1. An input detecting method, used for input detection of a virtual projecting input system, comprising:
- emitting an image light beam through a reflecting mirror, and the image light beam forming a projecting point on a projecting plane;
enabling the reflecting mirror to swing, so as to enable the image light beam to swing, and the projecting point scanning back and forth on the projecting plane to generate an input image;
detecting a swing frequency of the reflecting mirror to generate a frequency signal;
judging whether or not an input action occurs, and if yes, generating a detecting signal; and
analyzing a phase difference between the frequency signal and the detecting signal, and calculating an input position of the input action according to the phase difference.
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Accused Products
Abstract
An input detecting method used for a virtual projecting input system includes: emitting an image light beam through a reflecting mirror, and the image light beam forming a projecting point on a projecting plane; enabling the reflecting mirror to swing, so as to enable the image light beam to swing, and the projecting point scanning back and forth on the projecting plane, and generating an input image; detecting a swing frequency of the reflecting mirror, and generating a frequency signal; judging whether an input action occurs, and if yes, generating a detecting signal; and analyzing a phase difference between the frequency signal and the detecting signal, and calculating an input position of the input action according to the phase difference.
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Citations
20 Claims
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1. An input detecting method, used for input detection of a virtual projecting input system, comprising:
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emitting an image light beam through a reflecting mirror, and the image light beam forming a projecting point on a projecting plane; enabling the reflecting mirror to swing, so as to enable the image light beam to swing, and the projecting point scanning back and forth on the projecting plane to generate an input image; detecting a swing frequency of the reflecting mirror to generate a frequency signal; judging whether or not an input action occurs, and if yes, generating a detecting signal; and analyzing a phase difference between the frequency signal and the detecting signal, and calculating an input position of the input action according to the phase difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An input detecting method, used for input detection of a virtual projecting input system, comprising:
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emitting an image light beam through a reflecting mirror, and the image light beam forming a projecting point on a projecting plane; enabling the reflecting mirror to swing, so as to enable the image light beam to swing, and the projecting point scanning back and forth on the projecting plane, and generating an input image; in a first time of complete scanning, when receiving a reflected light beam, judging a first swing angle of the image light beam in a first direction; in the first time of complete scanning, detecting whether the reflected light beam is received when the image light beam is located at a second swing angle of the first direction, and then setting as a first detecting result; in a second time of complete scanning, detecting whether the reflected light beam is received when the image light beam is located at the first swing angle of the first direction, and then setting as a second detecting result; in the second time of complete scanning, detecting whether the reflected light beam is received when the image light beam is located at the second swing angle of the first direction, and then setting as a third detecting result; and judging whether a keying input action occurs according to the first detecting result, the second detecting result, and the third detecting result. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A virtual projecting input system, comprising:
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a projecting device, comprising a reflecting mirror module, used to emit and swing an image light beam, so that the image light beam forms a projecting point on a projecting plane, and the projecting point scans back and forth on the projecting plane, so as to generate an input image, wherein the reflecting mirror module comprises a frequency signal corresponding to a swing frequency of the reflecting mirror module; a light detector, used to detect a reflected light of the image light beam to a touch object, and generate a triggering signal; a frequency signal generating unit, used to generate a detecting signal according to the triggering signal; and a phase analyzer, used to analyze a phase difference between the detecting signal and the frequency signal, and calculate an input position of the touch object according to the phase difference. - View Dependent Claims (17, 18, 19, 20)
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Specification