Virtual optical input device with feedback and method of controlling the same
First Claim
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1. A method for a mobile device to control a virtual input device, comprising:
- displaying information on a display unit;
forming a virtual input pattern for detection of user input on an input region of a display plane outside the mobile device by using visible light;
detecting a distance difference between an input means and an invisible shadow of the input means, wherein the invisible shadow of the input means is generated by an invisible light;
detecting a relative velocity between the input means and the invisible shadow of the input means;
determining a contact of the input means on the virtual input pattern based on both the distance difference and when a sign value of the relative velocity between the input means and the invisible shadow changes, wherein the sign value represents a positive value or a negative value; and
displaying, as a feedback, feedback information on the contact through a projector on a feedback region of the display plane,wherein the feedback region is apart from the input region.
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Abstract
Provided are a virtual optical input device capable of providing feedback and a method of controlling the same. In the method, a portion of an input means such as a finger, and a portion of a shadow of the input means generated by a light source are detected through image processing. Physical variations formed between them are used to detect the touch contact of the input means, calculate the position and motion of the input means, and provide the corresponding feedback.
14 Citations
22 Claims
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1. A method for a mobile device to control a virtual input device, comprising:
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displaying information on a display unit; forming a virtual input pattern for detection of user input on an input region of a display plane outside the mobile device by using visible light; detecting a distance difference between an input means and an invisible shadow of the input means, wherein the invisible shadow of the input means is generated by an invisible light; detecting a relative velocity between the input means and the invisible shadow of the input means; determining a contact of the input means on the virtual input pattern based on both the distance difference and when a sign value of the relative velocity between the input means and the invisible shadow changes, wherein the sign value represents a positive value or a negative value; and displaying, as a feedback, feedback information on the contact through a projector on a feedback region of the display plane, wherein the feedback region is apart from the input region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 22)
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8. A virtual input device comprising:
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a display unit displaying information; a user input detector configured to; generate a virtual input pattern for detection of user input on an input region of a display plane outside a mobile device; detect a distance difference between an input means and an invisible shadow of the input means, wherein the invisible shadow of the input means is generated by an invisible light; detect a relative velocity between the input means and the invisible shadow of the input means; and determine a contact of the input means on the virtual input pattern based on both the distance difference and when a sign value of the relative velocity between the input means and the invisible shadow changes, wherein the sign value represents a positive value or a negative value; a projector displaying, as a feedback, feedback information on a contact of a portion of the input means on a feedback region of the display plane, wherein the feedback region is apart from the input region; and a controller executing, when a portion of the input means contacts the virtual input pattern, a command corresponding to the contact point and controlling an image processor so that the projector displays the feedback. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A mobile device comprising:
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a display unit displaying information; a wireless communication unit performing wireless communication with a wireless communication system or another mobile device; a user input detector configured to; generate a virtual input pattern for detection of user input on an input region of a display plane outside the mobile device; detect a distance difference between an input means and an invisible shadow of the input means, wherein the invisible shadow of the input means is generated by an invisible light; detect a relative velocity between the input means and the invisible shadow of the input means; and determine a contact of the input means on the virtual input pattern based on both the distance difference and when a sign value of the relative velocity between the input means and the invisible shadow changes, wherein the sign value represents positive value or negative value; a projector displaying, as a feedback, feedback information on a contact of a portion of the input means on a feedback region of the display plane, wherein the feedback region is apart from the input region; a memory unit storing the input pattern and the corresponding command; and a control unit controlling the operations of the above components. - View Dependent Claims (18, 19, 20, 21)
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Specification