Parallelogram Subpixel Arrangement for Virtual Display Viewing Angle
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Solution Overview
Problem
Traditional virtual display products with one domain pixel design suffer from limited viewing angle and significant color shift due to identical pixel structures, leading to increased manufacturing complexity and costs.
Innovation Solution
A display substrate with subpixel units arranged in a parallelogram shape, where adjacent rows have opposite incline directions, allowing liquid crystals of the same color to be aligned differently, thereby increasing viewing angle and reducing color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional one-domain pixel structure is used, then manufacturing process is simple, but viewing angle is small and color shift is obvious
Solution Approach 1:
The pixel structure is divided into two domains with different liquid crystal alignment directions. Each domain covers half of the pixel area, allowing light to be modulated from multiple directions. This segmentation enables the display to achieve wider viewing angles and reduced color shift while maintaining compatibility with existing manufacturing processes.
Solution Approach 2:
The patent introduces asymmetric pixel designs where adjacent pixels have different liquid crystal alignment directions (e.g., one pixel aligned horizontally, adjacent pixel aligned vertically). This asymmetry in arrangement creates a multi-domain effect that compensates for viewing angle limitations and color shift issues inherent in traditional symmetric single-domain structures.
2Manufacturing precision
If pixel density is increased to improve resolution, then display quality improves, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent employs virtual display technology where a physical display with lower pixel density is used in combination with image processing algorithms. The system dynamically processes and maps images to create a virtual high-resolution display effect, allowing the physical hardware to have fewer pixels while the perceived resolution is enhanced through computational methods.
Solution Approach 2:
The patent changes the parameter of pixel structure from traditional single-domain to multi-domain configuration. This structural parameter change allows each physical pixel to function more efficiently by controlling liquid crystal alignment in multiple directions, thereby improving display quality without requiring an increase in the number of physical pixels, thus avoiding increased manufacturing complexity.
3Ease of manufacture
If subpixel units are arranged in uniform patterns, then manufacturing is easier, but liquid crystal alignment is limited resulting in poor viewing angle
Solution Approach 1:
Each pixel is segmented into multiple domains with different liquid crystal alignment directions. Within each pixel, different regions have liquid crystal molecules oriented in different directions (e.g., horizontal, vertical, diagonal), allowing the display to maintain simple manufacturing processes while achieving flexible liquid crystal alignment control for improved viewing angles.
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 proposed display substrate effectively enhances viewing angle and color uniformity by implementing a two-pixels-two-domains pixel structure, reducing manufacturing complexity and costs while maintaining high display quality.
Implementation Method 1
liquid crystal in subpixels of the same color under a certain gray scale has the same alignment direction
Data Source
AI summary
The present disclosure provides a display substrate and a display device, which display substrate including a base substrate a plurality rows of subpixel units formed on the base substrate. Each of the subpixel units is of a parallelogram shape including first sides parallel to the row direction and second sides inclined with respect to vertical direction, wherein the vertical direction is perpendicular to the row direction, second sides of subpixel units in the same row have consistent incline direction, and second sides of subpixel units in adjacent two rows have opposite incline directions. With the display substrate provided in the present disclosure, a display mode of two-pixels-two-domains pixel structure may be implemented by designing subpixel units in the display substrate as parallelograms and making subpixel units in adjacent two rows to have opposite incline directions, which allows to effectively increase viewing angle and reduce color shift while the display substrate is used for virtual display.