Dual-Gate Pixel Circuit With Voltage Stabilization for Brightness Uniformity
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Solution Overview
Problem
Ensuring brightness uniformity of subpixels in AMOLED display panels is challenging due to variations in voltage stabilization, affecting the overall display effect.
Innovation Solution
A display substrate design featuring a base substrate with subpixels arranged in rows, each including a subpixel driving circuitry with a voltage stabilizing electrode and conductor portion that form a voltage stabilizing capacitor, stabilizing the voltage of transistors to improve brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional AMOLED technology is used, then the display panel can be manufactured, but brightness uniformity of subpixels cannot be ensured
Solution Approach 1:
A voltage stabilizing electrode is introduced as an intermediary element between the power source signal line and the first transistor. This electrode forms a voltage stabilizing capacitor that mediates voltage fluctuations, ensuring stable operation of the first transistor and thereby achieving uniform brightness across all subpixels without compromising display reliability
Solution Approach 2:
The invention changes the electrical parameters by introducing a voltage stabilizing electrode that forms a capacitor with the conductor portion of the first transistor. This modifies the voltage characteristics at the gate of the first transistor, stabilizing it against fluctuations and enabling precise control of subpixel brightness for improved uniformity
2Manufacturing precision
If a voltage stabilizing electrode is added to each subpixel, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The voltage stabilizing electrode serves multiple functions: it acts as an electrode for the first transistor, forms a voltage stabilizing capacitor with the conductor portion, and connects to the power source signal line. By making this single element multi-functional, the invention improves brightness uniformity without proportionally increasing device complexity
Solution Approach 2:
The invention merges the voltage stabilizing function with the existing first transistor structure by using the conductor portion of the first transistor as one plate of the voltage stabilizing capacitor. This integration approach combines multiple functions into existing structures, minimizing the increase in device complexity while achieving improved brightness uniformity
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 solution effectively stabilizes the voltage of transistors, enhancing brightness uniformity across subpixels and improving the display panel's overall performance.
Implementation Method 1
a voltage stabilizing electrode that forms a voltage stabilizing capacitor with the conductor portion of the first transistor
Data Source
AI summary
A display substrate, a manufacturing method thereof and a display device. The display substrate includes a base substrate and a plurality of subpixels arranged in an array form on the base substrate. Each subpixel includes a voltage stabilizing electrode, and a subpixel driving circuitry including a driving transistor, and a first transistor, a first electrode of which is coupled to a second electrode of the driving transistor, and a second electrode of which is coupled to a gate electrode of the driving transistor. An active layer of the first transistor includes a first semiconductor portion and a second semiconductor portion spaced apart from each other, and a conductor portion coupled to thereto. An orthogonal projection of the conductor portion onto the base substrate overlaps an orthogonal projection of voltage stabilizing electrode of a previous subpixel in the first direction onto the base substrate. According to the present disclosure, it is able to improve the brightness uniformity of the subpixels of a display panel.