Auxiliary Electrode for LCD Pixel Edge Light Leakage
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the weak electric field at the periphery of pixel electrodes leads to difficulty in deflecting liquid crystal molecules, resulting in light leakage at the edges of pixel units.
Innovation Solution
An auxiliary electrode is arranged at the periphery of the pixel electrode, enhancing the electric field and increasing the deflection angle of liquid crystal molecules, thereby preventing light leakage by connecting one end to the drain electrode of a thin film transistor and the other end to the pixel electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If no auxiliary electrode is arranged, then the device structure is simple, but light leakage occurs at the edges of pixel units due to weak electric field
Solution Approach 1:
The auxiliary electrode is arranged only at the periphery of the pixel electrode, creating a localized enhancement of the electric field precisely where light leakage occurs. This targeted approach improves the electric field strength at the edges without requiring a complete restructuring of the entire device, thus resolving the contradiction between eliminating light leakage and maintaining structural simplicity.
Solution Approach 2:
The auxiliary electrode acts as an intermediary element that mediates between the pixel electrode and the liquid crystal molecules at the periphery. By introducing this intermediate component, the electric field is enhanced in the critical region without directly modifying the pixel electrode or liquid crystal materials, thereby preventing light leakage while maintaining overall device simplicity.
2Reliability
If auxiliary electrode is arranged at periphery of pixel electrode, then electric field is enhanced and light leakage is prevented, but device structure becomes more complex
Solution Approach 1:
The auxiliary electrode is strategically positioned only at the periphery of the pixel electrode where light leakage occurs, rather than uniformly across the entire pixel electrode. This localized enhancement improves light-shielding properties at the critical edges while minimizing the additional structural complexity introduced by the auxiliary electrode.
Solution Approach 2:
Instead of enhancing the electric field uniformly across the entire pixel electrode, the auxiliary electrode provides partial enhancement specifically at the periphery where it is most needed. This partial action approach achieves sufficient light-shielding improvement without the excessive structural complexity that would result from a complete redesign of the pixel electrode.
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 enhanced electric field effectively prevents light leakage at the edges of pixel units by increasing the deflection angle of liquid crystal molecules, improving the display's light-shielding and light-transmitting properties.
Implementation Method 1
an auxiliary electrode is additionally arranged in at least one of peripheries of a pixel electrode of a pixel unit, so that an electric field within the region may be enhanced
Implementation Method 2
the deflection angle of liquid crystal molecules within the region may be increased
Data Source
AI summary
An array substrate, a manufacturing method thereof and a display device are provided. The array substrate comprises a plurality of gate lines (102) and a plurality of data lines (101); a region defined by adjacent data lines (101) and adjacent gate lines (102) is a pixel unit; the pixel unit includes a common electrode line (103), a pixel electrode (104), a thin film transistor (105) and an auxiliary electrode (202); a first end of the auxiliary electrode (202) is electrically connected with a drain electrode (203) of the thin film transistor (105); and a second end of the auxiliary electrode (202) is electrically connected with the pixel electrode (104). The array substrate is used for enhancing an electric field within the peripheral range of the pixel electrode (104) of the pixel unit and avoiding the phenomenon of light leakage at an edge of the pixel unit.