ELECTRONIC FREEBOARD WRITING SYSTEM
First Claim
1. A writing system comprising:
- a pen including a two-dimensional optical sensor and a three dimensional acceleration sensor positioned to indicate movement of the pen;
a calibrator coupled to receive path coordinate signals from the two-dimensional optical sensor and the three dimensional acceleration sensor; and
the calibrator and the two-dimensional optical sensor and the three dimensional acceleration sensor configured to operate in one of two modes, a contactable mode of operation wherein both the two-dimensional optical sensor and the three dimensional acceleration sensor supply path coordinate signals to the coordinator and a contactless mode of operation wherein only the three dimensional acceleration sensor supplies path coordinate signals to the coordinator.
1 Assignment
0 Petitions
Accused Products
Abstract
A writing system includes a pen with a two-dimensional optical sensor and a three dimensional acceleration sensor positioned to indicate movement of the pen. A calibrator is coupled to receive path coordinate signals from the two-dimensional optical sensor and the three dimensional acceleration sensor. The calibrator and the two-dimensional optical sensor and the three dimensional acceleration sensor are configured to operate in one of two modes, a contactable mode of operation wherein both the two-dimensional optical sensor and the three dimensional acceleration sensor supply path coordinate signals to the coordinator and a contactless mode of operation wherein only the three dimensional acceleration sensor supplies path coordinate signals to the coordinator.
35 Citations
25 Claims
-
1. A writing system comprising:
-
a pen including a two-dimensional optical sensor and a three dimensional acceleration sensor positioned to indicate movement of the pen; a calibrator coupled to receive path coordinate signals from the two-dimensional optical sensor and the three dimensional acceleration sensor; and the calibrator and the two-dimensional optical sensor and the three dimensional acceleration sensor configured to operate in one of two modes, a contactable mode of operation wherein both the two-dimensional optical sensor and the three dimensional acceleration sensor supply path coordinate signals to the coordinator and a contactless mode of operation wherein only the three dimensional acceleration sensor supplies path coordinate signals to the coordinator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A writing system comprising:
-
a pen including a two-dimensional optical sensor, a three dimensional acceleration sensor, and a controller coupled to the two-dimensional optical sensor and the three dimensional acceleration sensor and configured to convert signals received from the two-dimensional optical sensor and the three dimensional acceleration sensor into path coordinate signals; a switch coupled to the controller, the switch and controller being configured to provide a contactable mode of operation and a contactless mode of operation, the controller coupled to receive signals from both the two-dimensional optical sensor and the three dimensional acceleration sensor in the contactable mode of operation and to receive signals only from the three dimensional acceleration sensor in the contactless mode of operation; and a calibrator coupled to receive the path coordinate signals from the controller and to generate display parameters in response thereto. - View Dependent Claims (13, 14)
-
-
15. A method of writing on one of a writing surface and a writing space comprising the steps of:
-
providing a pen including a two-dimensional optical sensor and a three dimensional acceleration sensor positioned to indicate movement of the pen and a calibrator coupled to receive path coordinate signals from the two-dimensional optical sensor and the three dimensional acceleration sensor; and coupling the two-dimensional optical sensor, the three dimensional acceleration sensor, and the calibrator into one of a contactable mode of operation in which both the two-dimensional optical sensor and a three dimensional acceleration sensor communicate signals to the calibrator and a contactless mode of operation in which only the three dimensional acceleration sensor communicates signals to the calibrator. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A method of writing on one of a writing surface and a writing space comprising the steps of:
-
providing a pen including a two-dimensional optical sensor, a three dimensional acceleration sensor, and a controller coupled to the two-dimensional optical sensor and the three dimensional acceleration sensor and configured to convert signals received from the two-dimensional optical sensor and the three dimensional acceleration sensor into path coordinate signals, a switch coupled to the controller, the switch and controller being configured to provide a contactable mode of operation and a contactless mode of operation, the controller coupled to receive signals from both the two-dimensional optical sensor and the three dimensional acceleration sensor in the contactable mode of operation and to receive signals only from the three dimensional acceleration sensor in the contactless mode of operation, and a calibrator coupled to receive the path coordinate signals from the controller and to generate display parameters in response thereto; transmitting signals representative of the path coordinates to the calibrator, generating display parameters in the calibrator, and transmitting signals representative of the display parameters to a computer, and using the computer, generating a display of the pen movement from received signals representative of the display parameters. - View Dependent Claims (21, 22, 23)
-
-
24. A method of writing on a writing surface comprising the steps of:
-
providing a writing surface; providing a pen including a two-dimensional optical sensor, a three dimensional acceleration sensor, and a controller coupled to the two-dimensional optical sensor and the three dimensional acceleration sensor and configured to convert signals received from the two-dimensional optical sensor and the three dimensional acceleration sensor into path coordinate signals, the controller coupled to receive signals from both the two-dimensional optical sensor and the three dimensional acceleration sensor in a contactable mode of operation, and a calibrator coupled to receive the path coordinate signals from the controller and to generate display parameters in response thereto, a computer coupled to receive the display parameters and to generate a display in response thereto, and a projector positioned to project a display onto the writing surface; storing path coordinates representative of a base line on the writing surface in the calibrator, generating display parameters of the base line in the calibrator and sending the generated display parameters of the base line to the computer and generating a display of the base line in the computer; sending the display of the base line from the computer to the projector and projecting a writing area and a base line onto the writing surface; initializing the pen by moving the pen along the projection of the base line on the writing surface and generating real time path coordinates in the pen representative of the pen movement along the projection of the base line; and transmitting signals representative of the real time path coordinates to the calibrator and generating real time display parameters in the calibrator by comparing real time path coordinates to the stored path coordinates, and transmitting signals representative of a difference to the computer. - View Dependent Claims (25)
-
Specification