Patent ID: 11908360
Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A charge detection circuit, comprising: a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a first storage capacitor, and a second storage capacitor;
a gate electrode of the first thin film transistor electrically connected to a first power signal, a drain electrode of the first thin film transistor electrically connected to a second power signal, and a source electrode of the first thin film transistor electrically connected to a first node;
a gate electrode of the second thin film transistor electrically connected to the first node, a drain electrode of the second thin film transistor electrically connected to a third power signal, and a source electrode of the second thin film transistor electrically connected to a second node;
a gate electrode of the third thin film transistor electrically connected to a first control signal, a drain electrode of the third thin film transistor electrically connected to the second node, and a source electrode of the third thin film transistor electrically connected to an input terminal of an integrator;
a gate electrode of the fourth thin film transistor electrically connected to a second control signal, a drain electrode of the fourth thin film transistor electrically connected to a fourth power signal, and a source electrode of the fourth thin film transistor electrically connected to the first node;
one terminal of the first storage capacitor electrically connected to the gate electrode of the first thin film transistor, and the other terminal of the first storage capacitor electrically connected to the first node; and
one terminal of the second storage capacitor electrically connected to the drain electrode of the fourth thin film transistor, and the other terminal of the second storage capacitor electrically connected to the second node,
wherein a difference value between a voltage at the gate electrode of the first thin film transistor and a voltage at the source electrode is ranged from 5 volts to 10 volts.