Array Substrate Data-Line Segmentation for Uniform OLED Brightness
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Solution Overview
Problem
Existing OLED display technologies face challenges in efficiently managing the driving current to maintain consistent illumination across different color subpixels, leading to potential brightness inconsistencies and inefficiencies.
Innovation Solution
The array substrate design includes specific data line configurations and anode protrusions that optimize the overlap and arrangement of subpixel apertures, ensuring uniform light emission by controlling the ratio of data line areas and anode projections, thereby stabilizing the driving current for each color subpixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data lines cross over subpixel apertures of multiple colors, then connectivity is improved, but brightness uniformity deteriorates
Solution Approach 1:
The data lines are segmented into two distinct types: first type data lines that cross only subpixel apertures of a single color, and second type data lines that do not cross any subpixel apertures. This segmentation allows each data line to have a specialized function, resolving the conflict between connectivity needs and brightness uniformity requirements.
Solution Approach 2:
Different regions of the display are assigned different data line types based on local requirements. First type data lines are used where connectivity through subpixel apertures is needed, while second type data lines are used in regions where avoiding aperture crossing is prioritized for brightness uniformity. This local differentiation resolves the universal contradiction.
2Reliability
If data lines cross subpixel apertures, then electrical connection is improved, but light emission uniformity deteriorates
Solution Approach 1:
The data line system is divided into first type data lines for electrical connectivity (crossing subpixel apertures of one color only) and second type data lines for maintaining light emission uniformity (not crossing any apertures). This segmentation allows simultaneous achievement of reliable electrical connection and uniform light emission.
Solution Approach 2:
Instead of having all data lines cross subpixel apertures to ensure connectivity, the invention inverts the approach by using second type data lines that deliberately avoid crossing apertures in regions where light emission uniformity is critical, while using first type lines only where connectivity is prioritized.
3Adaptability or versatility
If data lines are configured to cross multiple subpixel colors, then routing flexibility is improved, but manufacturing precision requirements increase
Solution Approach 1:
Data lines are segmented into first type (crossing one color's apertures) and second type (not crossing any apertures). This segmentation simplifies the routing rules compared to allowing arbitrary multi-color crossings, thereby reducing manufacturing precision requirements while maintaining adequate routing flexibility.
Solution Approach 2:
Different data line types are assigned to different routing scenarios based on local requirements. First type lines provide flexibility where aperture crossing is acceptable, while second type lines maintain precision where aperture avoidance is needed, optimizing the balance between flexibility and precision requirements.
Data Source
AI summary
An array substrate is provided. The array substrate includes a plurality of first type data lines and a plurality of second type data lines. A respective one of the plurality of first type data lines crosses over subpixel apertures of multiple subpixels of a first color, and does not crosses over subpixel apertures of any subpixel of a second color and does not crosses over subpixel apertures of any subpixel of a third color, the first color, the second color, and the third color being different colors. A respective one of the plurality of second type data line does not cross over any subpixel aperture. A respective subpixel aperture of a subpixel of the first color includes a first region and a second region. A ratio of a first area of the first region to a second area of the second region is in a range of 2:8 to 8:2.