Pixel Structure with Layered Signal Lines for Display Efficiency
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Solution Overview
Problem
The low transmittance of liquid crystal display panels leads to increased power consumption and manufacturing costs, primarily due to the low aperture ratio, which affects display efficiency and is influenced by the design of the pixel layer controlling electric fields for liquid crystal molecules.
Innovation Solution
A pixel structure with a pixel electrode layer divided into domain display areas, each containing bar-like electrodes, and signal lines in a separate layer, with dividing lines of domain areas covered by signal lines to prevent interference, and an optional signal shielding layer to mitigate electric field interference, enhancing the aperture ratio and display efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel layer design is optimized to improve aperture ratio, then transmittance increases, but signal line interference on liquid crystal molecules worsens
Solution Approach 1:
The patent separates the pixel electrode layer and signal lines into different layers (z-dimension), with the pixel electrode layer in the first layer and signal lines in the second layer. This vertical separation reduces electromagnetic interference while maintaining high aperture ratio, as signal lines are positioned above the pixel electrode layer without occupying display area
Solution Approach 2:
A shielding layer is introduced as an intermediary component between the signal lines and pixel electrode layer. This shielding layer acts as a mediator to block or reduce electromagnetic interference from signal lines affecting liquid crystal molecules, while maintaining the benefits of the separated layer structure
2Ease of manufacture
If signal lines are placed in the same layer as pixel electrode, then manufacturing is simpler, but interference with liquid crystal molecules increases
Solution Approach 1:
Instead of placing signal lines in the same layer as pixel electrode, the patent positions them in different layers (vertical separation). This adds a layer to the structure but eliminates the need for complex routing within the same layer, and more importantly, reduces interference while maintaining manufacturing feasibility through standard multi-layer TFT processes
3Productivity
If dividing lines of domain areas are positioned in non-display areas, then display efficiency improves, but aperture ratio is reduced
Solution Approach 1:
The patent positions dividing lines of domain areas within the display area rather than in non-display areas. By combining this with the separated layer structure, the dividing lines can be located in display areas without causing signal interference, as the signal lines are in a different layer. This maximizes the use of display area while maintaining display efficiency
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 solution improves display efficiency and aperture ratio by minimizing the impact of signal lines on liquid crystal molecules, reducing color cast and enhancing viewing angles, thereby reducing power consumption and manufacturing costs.
Implementation Method 1
an optional signal shielding layer to mitigate electric field interference
Data Source
AI summary
The present disclosure provides a pixel structure, an array substrate and a display device and a method for manufacturing the same. The pixel structure includes a pixel electrode layer and signal lines. The pixel electrode layer is divided into a plurality of domain display areas. Each domain display area includes a plurality of bar-like electrodes which extend with a given angle. The signal lines are in a layer different from the pixel electrode layer. Dividing lines of at least a part of the domain display areas in the pixel electrode layer are in areas covered by the signal lines.