Pixel Structure Common Electrode Line Light Shielding
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Solution Overview
Problem
In TFT-LCDs, the black matrix fails to effectively shield the non-display region due to width deviations and layer coincidences, leading to light leakage, reduced contrast, and decreased aperture opening ratio, necessitating a design that also shields part of the display region, which can result in increased power consumption and reduced brightness.
Innovation Solution
The pixel structure incorporates common electrode lines with a first part extended along the row direction and a second part along the column direction, both in the same layer as the data lines, allowing for electrical connection without bridges or holes, and the first part's projection is placed between gate lines and pixel electrodes to shield light, reducing the black matrix width and improving aperture opening ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix width is increased to effectively shield the non-display region, then light leakage is reduced, but the aperture opening ratio decreases
Solution Approach 1:
the common electrode line includes a first part extended along the row direction and a second part extended along the column direction; the first part is electrically connected with the second part; both the first part and the second part are arranged in a same layer with the data line
2Object-affected harmful factors
If the black matrix is designed to shield the non-display region, then light leakage is reduced, but contrast decreases due to inability to shield display region
Solution Approach 1:
the projection of the first part on the base substrate is at least partially disposed between projections of the gate line and the pixel electrode on the base substrate
3Reliability
If the common electrode line uses traditional bridge or hole connection methods, then electrical connection is achieved, but process complexity increases
Solution Approach 1:
both the first part and the second part are arranged in a same layer with the data line
4Use of energy by moving object
If the common electrode line resistance is reduced, then power consumption decreases, but aperture opening ratio may increase
Solution Approach 1:
the common electrode line includes a first part extended along the row direction and a second part extended along the column direction
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 simplifies the process, reduces the overall resistance of common electrode lines, alleviates the greenish phenomenon, and enhances the aperture opening ratio while maintaining brightness and avoiding light leakage.
Implementation Method 1
a projection of the first part on the base substrate is at least partially disposed between projections of the gate line and the pixel electrode on the base substrate
Implementation Method 2
The alignment of liquid crystal molecules is controlled by the change in the electric field intensity between the common electrodes and the pixel electrodes
Data Source
AI summary
A pixel structure, a display panel and a display device are provided. The pixel structure includes: a base substrate; a plurality of gate lines; a plurality of data lines; a plurality of pixel units, each includes a pixel electrode and a common electrode; and a common electrode line connected with the common electrode, wherein, the common electrode line includes a first part extended along the row direction and a second part extended along the column direction; the first part is electrically connected with the second part; both the first part and the second part are arranged in a same layer with the plurality of data lines; and a projection of the first part on the base substrate is at least partially disposed between projections of a gate line among the plurality of gate lines which is closest to the first part and the pixel electrode on the base substrate.