Display Panel Multi-Gate Structure for Low-Frequency Flicker Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable display devices experience screen flicker and jitter due to increased coupling and current leakage at low refresh frequencies, which are necessary for low power consumption.
Innovation Solution
A display panel design with a multi-gate structure for driving transistors, including a double-gate structure for the driving transistor to increase channel length, and enhanced storage capacitance to reduce off-state leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low refresh frequency is used to reduce power consumption, then energy efficiency is improved, but screen flicker and jitter occur due to increased coupling and current leakage
Solution Approach 1:
The gate signal line is divided into a body part and multiple additional parts distributed at intervals. Each additional part independently forms a gate electrode that covers corresponding active parts, creating multiple segmented gate regions. This segmentation allows for localized control of the channel, reducing coupling effects and current leakage that cause flicker and jitter at low refresh frequencies, while maintaining low power consumption operation.
2Reliability
If channel length is increased to reduce off-state leakage current, then transistor control is improved, but device area increases
Solution Approach 1:
Instead of increasing channel length in a single linear direction, the gate electrode is extended in the second direction (perpendicular to the main current flow direction) to cover multiple active parts. This dimensional change allows the gate to control a longer effective channel length without proportionally increasing the area occupied by the gate structure itself, as the gate width in the second direction is optimized to cover the necessary active regions efficiently.
Data Source
AI summary
The present disclosure provides a display panel. The display panel includes a base substrate, a first conductive layer and an active layer that are stacked in sequence. The first conductive layer includes a plurality of gate signal lines. The gate signal line includes a body part and a plurality of additional parts. An orthographic projection of the body part on the base substrate extends along a first direction. The plurality of additional parts are distributed at intervals in the first direction and coupled to a side of the body part in a second direction. The additional part is used to form a gate of a driving transistor. The active layer includes a plurality of active structures disposed corresponding to the plurality of additional parts. Orthographic projections of the plurality of active structures on the base substrate are separated from each other.