ACTIVE STYLUS
First Claim
Patent Images
1. An active stylus for outputting an electric field in synchronization with a driving signal applied to a driving line coupled to an adjacent cell when the active stylus approaches or contacts a touch screen panel, the active stylus comprising:
- an electric field sensor configured to sense an electric field generated by the driving signal applied to a specific driving line approached or contacted by the stylus;
a signal generating unit configured to generate a predetermined signal so that a separate electric field corresponding to the sensed electric field is generated;
an electric field radiating unit configured to amplify the signal generated from the signal generating unit and output the amplified signal as an electric field;
a shielding unit configured to shield an electric field for forming a closed loop between the electric field sensor and the electric field radiating unit; and
a power unit configured to apply power to each of the electric field sensor, the signal generating unit, the electric field radiating unit and the shielding unit.
2 Assignments
0 Petitions
Accused Products
Abstract
An active stylus used in a mutual capacitive touch screen system is described. In one aspect, the active stylus includes a shielding unit formed to shield an electric field that forms a closed loop between input and output units of the active stylus, thereby overcoming of oscillation or a decrease in amplitude.
-
Citations
9 Claims
-
1. An active stylus for outputting an electric field in synchronization with a driving signal applied to a driving line coupled to an adjacent cell when the active stylus approaches or contacts a touch screen panel, the active stylus comprising:
-
an electric field sensor configured to sense an electric field generated by the driving signal applied to a specific driving line approached or contacted by the stylus; a signal generating unit configured to generate a predetermined signal so that a separate electric field corresponding to the sensed electric field is generated; an electric field radiating unit configured to amplify the signal generated from the signal generating unit and output the amplified signal as an electric field; a shielding unit configured to shield an electric field for forming a closed loop between the electric field sensor and the electric field radiating unit; and a power unit configured to apply power to each of the electric field sensor, the signal generating unit, the electric field radiating unit and the shielding unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification