Display Device Pixel Electrode Exposure Area Optimization
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Solution Overview
Problem
Existing organic light-emitting display devices face challenges in enhancing luminous efficiency due to limited exposure of pixel electrodes, which restricts the area available for light emission.
Innovation Solution
The display device incorporates a stripe pattern arrangement of sub-pixels with optimized distances and voltages applied to pixel electrodes, increasing the area of openings exposing these electrodes, thereby enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the area of openings exposing pixel electrodes is increased to improve luminous efficiency, then light emission efficiency is improved, but the complexity of the display device structure increases due to the need for additional power lines and data lines arrangement
Solution Approach 1:
The display device is divided into multiple sub-pixels (first, second, and third sub-pixels) with distinct electrode arrangements. Each sub-pixel has its own pixel electrode configuration, allowing independent optimization of light emission areas while maintaining overall device functionality. This segmentation enables increased total opening area without requiring complete redesign of the entire display structure.
Solution Approach 2:
Different regions of the display device have different structural characteristics. The first sub-pixel has a specific electrode arrangement with first and second data lines, while the second sub-pixel has a different arrangement with second and third data lines. This local differentiation allows each region to be optimized for maximum light emission while the overall structure remains manageable through modular design.
2Productivity
If multiple power lines and data lines are arranged closely to increase opening area, then luminous efficiency improves, but manufacturing precision requirements increase due to tighter spacing tolerances
Solution Approach 1:
Adjacent data lines and power lines from different sub-pixels are merged into shared conductive layers. The first data line serves both the first sub-pixel and is positioned adjacent to the second sub-pixel's structures. This merging reduces the total number of separate line structures required, thereby increasing the opening area while maintaining manageable manufacturing tolerances through reduced line density.
Solution Approach 2:
The patent utilizes multiple conductive layers stacked in the vertical dimension to accommodate multiple data lines and power lines. By arranging lines in different vertical layers rather than solely in the horizontal plane, the design increases horizontal opening area while maintaining adequate spacing between lines in the vertical dimension, thus reducing manufacturing precision requirements in the critical horizontal plane.
Data Source
AI summary
A display device includes a substrate, a first data line, a second data line and a third data line on the substrate, each of the first to third data lines being extend in a first direction and arranged in a second direction crossing the first direction, a first power line which is between the first data line and the second data line on the substrate, extends in the first direction, and supplies a first supply voltage, and a second power line which is between the second data line and the third data line on the substrate, extends in the first direction, and supplies a second supply voltage equal to the first supply voltage.