Patent ID: 7499026
Filing Date: 2009-03-03
Classification: G06F

Abstract:
1. An apparatus for entering graphic information into an electronic medium,comprising: a writing device comprising a wireless signal generator, wherein the signal generator is configured to emit a characteristic wireless signal and wherein the writing device is further configured to transmit an identification code identifying one of a plurality of writing device features of the writing device; a display device carrying a plurality of transceivers configured to receive the characteristic wireless signal and the identification code in real time, wherein the plurality of transceivers are spaced a sufficient distance from each other such that the there is a calculable time difference in the characteristic wireless signal received by the plurality of receivers, said plurality of transceivers further configured to transmit each time difference to a display device; and the display device further configured to calculate a position of the writing device and a trajectory of the writing device as the writing device is moved in order to electronically display the relative location and trajectory of the writing device on the display device in real time based on the writing device feature identified through the identification code, wherein the writing device can operate in an area detached from the display device.