Array Substrate Branch Electrode Width Variation for LCD Color Shift
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Solution Overview
Problem
Liquid crystal display (LCD) screens experience color shift when viewed from different angles, necessitating a solution to maintain image clarity across various viewing positions.
Innovation Solution
The array substrate design includes pixel units with first and second sub-pixel units, each comprising a pixel electrode with trunk and branch electrodes, where the branch electrodes in different sub-regions have varying widths to create distinct capacitance structures and electric fields, allowing liquid crystals to deflect at different angles, thereby achieving complementary viewing angles and reducing color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional pixel electrode structure is used, then the manufacturing process is simple, but color shift occurs when viewed from different angles
Solution Approach 1:
The pixel electrode is divided into multiple electrode sub-regions with different capacitance values. Each sub-region contains electrodes with specific width variations that create distinct capacitance structures, enabling different liquid crystal deflection angles in different sub-regions. This segmentation approach maintains manufacturing simplicity while eliminating color shift through multi-viewing angle capability.
Solution Approach 2:
Different electrode sub-regions are designed with locally optimized capacitance characteristics. The first electrode sub-region has different electrode width dimensions compared to the second electrode sub-region, creating localized capacitance differences that generate specific electric field distributions for different viewing angles.
2Manufacturing precision
If a single viewing angle is optimized, then the display quality at that angle is high, but color shift occurs when viewed from other angles
Solution Approach 1:
The electrode structure creates dynamically adjustable electric field distributions across different electrode sub-regions. By varying electrode widths in different sub-regions, the system can maintain optimal liquid crystal alignment and display quality across multiple viewing angles simultaneously, transforming a static single-angle optimization into a dynamic multi-angle solution.
Solution Approach 2:
The invention extends the viewing angle capability by adding spatial dimensionality to the electrode structure. Multiple electrode sub-regions with different capacitance values create a three-dimensional electric field distribution that accommodates viewers from different angles, effectively adding a spatial dimension to the display's viewing characteristics.
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 effectively minimizes color shift by forming multiple viewing angles within a single pixel unit, enhancing display uniformity and image clarity across various angles.
Implementation Method 1
when a voltage is applied to the pixel electrode and the common electrode, an electric field is generated in the liquid crystal layer
Implementation Method 2
liquid crystal molecules are deflected under an action of the electric field, thereby controlling a transmission situation of light
Data Source
AI summary
An array substrate and a display device are disclosed in the present application, the substrate includes a plurality of pixel units, one pixel unit at least comprises a first sub-pixel unit; a pixel electrode at least comprises a first pixel sub-electrode, the first pixel sub-electrode is arranged in the first sub-pixel unit, and comprises a plurality of branch electrodes; wherein the first sub-pixel unit at least comprises a first electrode sub-region and a second electrode sub-region, widths of the branch electrodes in the first electrode sub-region and the second electrode sub-region are different.