National Yang Ming Chiao Tung University

Quanta Display Inc.

An-Chih Wang

Han-Ping D Shieh

Jian-Zhi Huang

Chia-Feng Yang

Yen-Lin Wei

Yen-Chung Lin

Pei-Ming Chen

Jiun-Shiau Wang

An active TFT circuit structure with current scaling function is disclosed, which includes a current source, a data line, a scan line, a direct current voltage source, capacitors and four transistors, wherein the capacitors form a cascade structure. During the ON-state, the two of the transistors are turn-on based on the voltage provided by the scan line, so that the data current provided by the current source flows through the data line-and the transistor which is one of the opened transistors, thereby arriving an emitting light element and the transistor connected to the emitting light element. When the pixel circuit changes from ON- to OFF-state, the voltage of the node between the storage capacitors reduces due to the feed-through effect of one of storage capacitor, thereby reducing the driving current of the emitting light element. Therefore, it can be achieved the current scaling function.

Current-scaling active thin film transistor circuit structure for pixel of display device

Growing community of inventors

Tao Yuan Shien, Taiwan

An-Chih Wang