| 摘要 |
A sensing circuit for external compensation, a sensing method thereof and a display apparatus, the sensing circuit for external compensation comprises a differential amplifier (9), a first capacitor (4), a second capacitor (8) and an output voltage controlling circuit (10) for the first capacitor; a negative input terminal of the differential amplifier (9) is connected with a display panel (1), a positive input terminal thereof is connected with a reference voltage, and an output terminal thereof is connected with an output terminal of the output voltage controlling circuit (10) for the first capacitor; the output voltage controlling circuit (10) for the first capacitor is used for enabling an output voltage of the first capacitor (4) in a subsequent current integral stage to vary based on the reference voltage. The sensing circuit for external compensation, the sensing method thereof and the display apparatus according to embodiments of the present disclosure can store by using the capacitor an offset voltage of the amplifier in an initial stage to eliminate the differences in the voltage outputs caused by the offsets of the amplifiers among different channels and enhance the accuracy of the voltage output. |
