Inductance Structure Stabilizes Storage Capacitor Voltage in AMOLED Displays
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Solution Overview
Problem
The current active matrix organic light emitting diode (AMOLED) display technology experiences distorted luminance due to parasitic capacitance causing discharge of the storage capacitor, leading to unstable voltage supply to the drive transistor.
Innovation Solution
Incorporating an inductance structure on at least one plate of the storage capacitor, such as a homocentric squares or annular shape, to act as a charging element that stabilizes the charge of the storage capacitor, ensuring a constant voltage supply to the drive transistor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a storage capacitor is used in the current pixel circuit, then the drive transistor can maintain stable operation, but the storage capacitor is discharged through parasitic capacitance between the storage capacitor and the scanning signal line, causing distorted luminance
Solution Approach 1:
An inductance structure is introduced as an intermediary element between the storage capacitor and the scanning signal line. This inductance structure acts as a mediator that blocks the discharge path through parasitic capacitance while allowing the storage capacitor to maintain its charge and voltage, thereby preventing luminance distortion without affecting the stable operation of the drive transistor
Solution Approach 2:
The invention changes the electrical parameters of the pixel circuit by adding an inductance element. This parameter change modifies the impedance characteristics of the circuit, creating a high-impedance path that prevents charge leakage through parasitic capacitance while maintaining the necessary charging function, thus resolving the contradiction between stability and harmful discharge
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
This solution prevents the discharge of the storage capacitor, maintaining stable luminance by ensuring a constant voltage supply to the drive transistor, thereby alleviating the distortion issue in the current pixel circuit.
Implementation Method 1
the charging element includes an inductance structure disposed on at least one of the plates of the storage capacitor
Data Source
AI summary
The present disclosure provides a display panel and a display device, wherein the display panel includes at least one of the plates of the storage capacitor provided with a charging element. By providing the charging element, charging the storage capacitor when the storage capacitor is discharged, so that the charge of the storage capacitor tends to stable or keep stable. That is, the voltage supplied from the storage capacitor to the driving transistor is ensured to constant, so that the luminance of the pixel is not distorted.