| 摘要 |
A digitizer (12) for user interaction via an object (32) with an electronically refreshable display screen (14), the digitizer comprising: a transparent sensing arrangement of detectors (12) located at said electronically refreshable display screen for detecting an electric field (108) of said object, said detectors having outputs (18), and an arrangement of differential amplifiers (60.1) associated with said outputs, thereby to apply differential detection between said outputs. |
