Display Panel Flicker Reduction via Dual-Gate Transistor Stabilization
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Solution Overview
Problem
Display panels using variable frequency drive technology often experience a flicker phenomenon during low frequency mode operations, which affects image smoothness and power consumption.
Innovation Solution
A display panel design incorporating a pixel circuit with a driving module, a first reset module, a compensation module, and a light-emitting control module, featuring dual-gate transistors and capacitors to stabilize the potential of the control terminal, reducing leakage currents and minimizing flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If variable frequency drive technology is used to reduce power consumption in low frequency mode, then power consumption is reduced, but a flicker phenomenon occurs affecting image smoothness
Solution Approach 1:
The patent introduces a first reset module with a first dual-gate transistor as an intermediary component between the reference signal line and the control terminal of the driving module. This intermediary stabilizes the control terminal potential during low frequency mode operations, preventing the flicker phenomenon while maintaining reduced power consumption benefits
Solution Approach 2:
The patent utilizes parameter changes by adjusting the capacitance values of the first and second capacitors to be greater than or equal to the parasitic capacitances. This parameter optimization ensures effective stabilization of the control terminal potential, eliminating flicker while preserving the low power consumption advantage of variable frequency drive technology
2Object-affected harmful factors
If dual-gate transistors and capacitors are added to stabilize control terminal potential and reduce flicker, then flicker is minimized, but device complexity increases
Solution Approach 1:
The patent merges the reset function and compensation function into a unified circuit structure using dual-gate transistors. The first dual-gate transistor serves both as a reset switch and as part of the stabilization mechanism, while the second dual-gate transistor provides compensation. This merging approach reduces the number of discrete components needed compared to implementing separate reset and compensation circuits
Solution Approach 2:
The dual-gate transistors are designed to perform multiple functions: the first dual-gate transistor acts as both a reset switch and a stabilization element, while the second dual-gate transistor provides both compensation and stabilization. This multi-functionality reduces overall circuit complexity by having components serve multiple purposes rather than requiring dedicated components for each function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively reduces leakage currents and stabilizes the potential of the control terminal, thereby minimizing flicker and improving image smoothness across various frequency modes while optimizing power consumption.
Implementation Method 1
a first capacitor corresponding to a first parasitic capacitor of the first dual-gate transistor and a second capacitor corresponding to a second parasitic capacitor of the second dual-gate transistor are provided. A capacitance of the first capacitor is greater than or equal to a capacitance of the first parasitic capacitor, and/or a capacitance of the second capacitor is greater than or equal to a capacitance of the second parasitic capacitor
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a pixel circuit including a driving module, a first reset module, a compensation module, a light-emitting control module and a light-emitting module. The first reset module includes a first dual-gate transistor, and the compensation module includes a second dual-gate transistor. A first intermediate node of the first dual-gate transistor and a second intermediate node of the second dual-gate transistor are electrically connected to a light-emitting control signal line through a first capacitor and a second capacitor, respectively. The first dual-gate transistor includes a first parasitic capacitor corresponding to the first capacitor, and the second dual-gate transistor includes a second parasitic capacitor corresponding to the second capacitor. A capacitance of at least one of the first capacitor and the second capacitor is greater than or equal to a capacitance of the corresponding parasitic capacitor.