Pixel Structure Extension Electrode for Display Crosstalk Reduction
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Solution Overview
Problem
Conventional display panels using a data line sharing (DLS) framework suffer from serious image roughness and crosstalk due to the lack of offsetting capacitors between sub-pixels and data lines, leading to abnormal displays like the 'shaking head' pattern.
Innovation Solution
The proposed pixel structure includes a plurality of scan lines and data lines that intersect to define sub-pixel sets, each comprising a common electrode, a first sub-pixel unit with a thin film transistor and pixel electrode, and a second sub-pixel unit with a thin film transistor and pixel electrode. An extension electrode is connected to the drain electrode of one of the sub-pixel units and located between the pixel electrodes, forming a storage capacitor with the common electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a data line sharing (DLS) framework is used to reduce the number of source drivers, then the manufacturing cost is reduced, but image quality deteriorates due to serious roughness and crosstalk
Solution Approach 1:
The pixel structure is divided into first and second sub-pixel units within each sub-pixel set, with each unit having its own thin film transistor and pixel electrode. This segmentation allows independent control and capacitor formation for each sub-pixel, enabling offsetting capacitors to be formed between adjacent sub-pixels while maintaining the DLS framework's cost benefits.
Solution Approach 2:
A third data line is introduced as an intermediary between adjacent sub-pixels. This third data line serves as a mediator to form offsetting capacitors with the pixel electrodes of adjacent sub-pixels, thereby reducing image roughness and crosstalk while still allowing the primary data lines to be shared between sub-pixels for cost reduction.
2Device complexity
If adjacent sub-pixels share the same data line without a data line between them, then the device complexity is reduced, but capacitor offsetting cannot be achieved causing image roughness and crosstalk
Solution Approach 1:
The third data line serves multiple functions: it acts as a shared data line for delivering signal voltages to pixel electrodes, and simultaneously functions as an offsetting capacitor electrode between adjacent sub-pixels. This multi-functionality allows capacitor offsetting to be achieved without significantly increasing device complexity.
Solution Approach 2:
The patent changes the electrical parameter configuration by introducing a third data line that can be set to different voltage levels. By adjusting the voltage parameters of the third data line relative to adjacent pixel electrodes, offsetting capacitors are formed dynamically, improving image display stability without altering the basic DLS framework structure.
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 introduction of the extension electrode increases the ratio of the storage capacitor in the sub-pixel unit, reduces the influence of capacitors formed by sub-pixels and data lines, and thereby improves image quality by minimizing image roughness and crosstalk.
Implementation Method 1
an extension electrode connected to the first drain electrode or the second drain electrode and located between the first pixel electrode and the second pixel electrode
Implementation Method 2
capacitor formed by the pixel electrode and the data lines
Data Source
AI summary
The present application discloses a pixel structure and a display panel. A sub-pixel set of the pixel structure includes a first sub-pixel unit having a first thin film transistor and a second sub-pixel unit having a second thin film transistor, a first source electrode of the first thin film transistor and a second source electrode of the second thin film transistor is connected to the same data line. The pixel structure further includes and an extension electrode connected to the first drain electrode or the second drain electrode and located between the first pixel electrode and the second pixel electrode.