| 摘要 |
An external compensation sensing circuit, a sensing method of same, and a display device. The external compensation sensing circuit comprises a differential amplifier (9), a first capacitor (4), a second capacitor (8), and a circuit (10) for controlling an output voltage of the first capacitor. A negative input end of the differential amplifier (9) is connected to a display screen (1), a positive input end is connected to a reference voltage, and an output end is connected to an output end of the circuit (10) for controlling an output voltage of the first capacitor; the circuit (10) for controlling an output voltage of the first capacitor is used to enable an output voltage of the first capacitor (4) to change by using the reference voltage as the reference in a subsequent current integration phase. By using the external compensation sensing circuit, the sensing method of same, and the display device according to the present invention, a capacitor can be used to store the offset voltage of an amplifier in an initial phase, and a voltage output difference between different channels and caused due to offset of the amplifier is eliminated, thereby improving the voltage output accuracy. |
