Pixel-Area Circuit Layout for Uniform Display Luminance
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Solution Overview
Problem
In display apparatuses, the coupling capacitance between driving circuits and gate lines varies, leading to uneven luminance among sub-pixels, which degrades image quality.
Innovation Solution
The display apparatus is designed with symmetrical arrangements of driving circuits and sub-pixels, using parallel gate and data lines, and reference voltage supply lines to minimize coupling capacitance and ensure consistent luminance across sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second driving circuit is arranged asymmetrically with respect to the first driving circuit to accommodate different gate line connections, then the layout flexibility is improved, but the coupling capacitance deviation between sub-pixels increases
Solution Approach 1:
The patent applies asymmetry in reverse - it deliberately creates a symmetrical arrangement where the second driving circuit is positioned symmetrically with respect to the first driving circuit, despite the inherent asymmetry in gate line connections. This symmetrical positioning ensures that both sub-pixels experience identical coupling capacitance conditions, thereby resolving the contradiction between layout flexibility and coupling capacitance uniformity.
2Manufacturing precision
If the distance between the driving thin film transistor and the gate line is increased to reduce coupling capacitance, then the coupling capacitance is reduced, but the area occupied by the pixel increases
Solution Approach 1:
The patent applies local quality by creating different spatial relationships for different components within the pixel. Specifically, the emission areas are positioned at different distances from the gate lines (first emission area closer to first gate line, second emission area closer to second gate line), while the driving circuits are positioned symmetrically. This localized optimization allows the pixel to maintain compact area while controlling coupling capacitance through symmetric driving circuit arrangement.
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 design reduces luminance deviations and coupling capacitance, enhancing image quality by maintaining consistent light emission from sub-pixels.
Implementation Method 1
a coupling capacitance can occur between each driving circuit and the gate line electrically connected to the corresponding driving circuit
Data Source
AI summary
A display apparatus including pixel areas is provided. The pixel areas can be disposed between first/second gate lines. Each of the pixel areas can include a first sub-pixel controlled by the first gate line and a second sub-pixel controlled by the second gate line. The second sub-pixel can display a different color from the first sub-pixel of the corresponding pixel area. The first/second sub-pixel of each pixel area can include a first/second driving circuit disposed close to the first/second gate line. The second driving circuit of each pixel area can share a data line with the first driving circuit of adjacent pixel area. The second driving circuit of each pixel area can have a symmetrical arrangement with the first driving circuit of adjacent pixel area. Thus, the deviation in the coupling capacitance occurring between each driving circuit and the gate line coupled to the corresponding driving circuit can be reduced.