Patent ID: 8754851

Claim:
A system for use with a base computing device, the apparatus comprising: a transparent panel; and a controller comprising: an enclosure; at least a key disposed on one side of the enclosure to be accessed by a user using the controller; a laser generator, housed inside the enclosure, coupled to and controlled by the key to project a visible laser for a user to use the controller as a remote pen to write a letter, a word or draw a line through the transparent panel onto a presentation being displayed on an electronic display board, wherein the transparent panel being held by the user between the controller and the electronic display board allows the user to write while moving around; a plurality of motion sensors generating sensor data when the controller is moved by the user against the transparent panel; a micro control unit coupled to the motion sensors and configured to derive a movement from the sensor data after a calibration is done with the controller, wherein the calibration is performed with the visible laser pointing at two or more designated points respectively displayed on the electronic display board, and wherein as the visible laser moves from one of the points to another one of the points, the sensor data is compared with motion of the visible laser, an offset therebetween is considered when the movement of the controller is derived; and means for transmitting the movement wirelessly to the base computing device configured to present on the electronic display board a symbol according to the derived movement of the controller, wherein the transmitting means is coupled to the micro control unit, the symbol is not part of the presentation but is superimposed onto the presentation.