Pixel driving circuit, display apparatus, and method of operating pixel driving circuit
The pixel driving circuit with a bypass current shunting mechanism and capacitor design addresses the challenges of controlling small currents in OLED displays, enabling precise brightness control and faster activation at low brightness levels.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2025-01-14
- Publication Date
- 2026-07-23
AI Technical Summary
Existing OLED display panels face challenges in precisely controlling small currents for low brightness and low gray levels due to the limitations of low-temperature polycrystalline silicon (LTPS) and indium gallium zinc oxide (IGZO) transistors, leading to poor voltage-to-current conversion and sensitivity issues, which hinder direct current (DC) dimming capabilities.
A pixel driving circuit incorporating a driving transistor, a light emitting element, a node, a fifth transistor, and a second capacitor, with a bypass current shunting mechanism and capacitor design to split the current into two paths, allowing the driving transistor to operate in a higher-current region and improve precision in current control.
The solution enables precise control of OLED currents at low brightness and gray levels, enhancing display performance by reducing sensitivity to voltage changes and accelerating activation speed, thereby achieving accurate brightness regulation.
Smart Images
Figure CN2025072257_23072026_PF_FP_ABST