一种像素电路及其驱动方法
By introducing additional transistors into the pixel circuit and adjusting the driving method, the high driving voltage requirement of triple-layer OLED devices is solved, ensuring the safe operation of MOS devices, avoiding black field ignition, and improving the reliability and contrast of the display.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING GUOZHAO OPTOELECTRONICS TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-07-17
AI Technical Summary
Existing pixel circuits cannot provide the high driving voltage required for triple-layer OLED devices, resulting in excessive withstand voltage of MOS devices and black field ignition problems, which affect the reliability and contrast of the display.
By adding transistors T5 and/or T6 and adjusting the driving method, transistors T1 and T2 share the voltage difference between the pixel voltage and the OLED anode, ensuring that the operating voltage of the MOS device does not exceed the withstand voltage value, and controlling the leakage current through capacitive coupling to avoid black field ignition.
It achieves high driving voltage for pixel circuits based on medium- and low-voltage CMOS technology, ensuring chip reliability, avoiding black field glow, and improving display contrast.
Smart Images
Figure CN120564624B_ABST