Display Common Voltage Line Layout for Narrow-Bezel Image Quality
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Solution Overview
Problem
As the proportion of the display area in a display apparatus increases, the peripheral area where light-emitting diodes are not arranged decreases, leading to a degradation in the quality of light emitted.
Innovation Solution
The display apparatus incorporates a substrate with a display area and a peripheral area, featuring a common voltage supply line with a first and second common voltage input unit adjacent to the display area, connected by a body portion, and common voltage division lines that branch and intersect within the display area, along with organic layers and metal patterns to optimize voltage distribution and reduce dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the proportion of display area is increased, then the display quality is improved, but the peripheral area decreases leading to degradation in light emission quality
Solution Approach 1:
The common voltage supply line is divided into multiple segments including a body portion and multiple branch portions extending in different directions. This segmentation allows the supply line to cover a larger area with sufficient common voltage while maintaining a compact structure that preserves peripheral display area.
Solution Approach 2:
The common voltage supply line transitions from a linear one-dimensional structure to a two-dimensional planar network with branch portions extending in multiple directions. This dimensional change enables the supply line to cover the display area more effectively without increasing the overall footprint, thus preserving peripheral area while ensuring adequate voltage supply.
2Reliability
If the common voltage supply line is extended to cover the display area, then the voltage distribution is improved, but the device complexity increases
Solution Approach 1:
The common voltage supply line merges the body portion with multiple branch portions into a single integrated structure. This combining approach ensures uniform voltage distribution across the display area while avoiding the complexity of multiple separate supply lines, as all branches originate from and are electrically connected to the same body portion.
Solution Approach 2:
The common voltage supply line serves multiple functions simultaneously: the body portion provides the main voltage supply path while the branch portions extend voltage to different regions of the display area. This multi-functionality eliminates the need for separate supply lines for different regions, reducing overall device complexity while maintaining reliable voltage distribution.
Data Source
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AI summary
A display apparatus includes: a substrate (100) including a display area (DA), and a peripheral area (PA) outside the display area; a common voltage supply line (10) including a first common voltage input unit (11), a second common voltage input unit (12), and a body portion (14); a common voltage division line (20) including a first division line (21) branching from the first common voltage input unit, a second division line (22) branching from the second common voltage input unit, and a third division line (23) connecting the first division line and the second division line to each other; a first common voltage line (1230) connected to the third division line, and extending in a first direction to cross the display area; and a second common voltage line (1220) connected to the first division line or the second division line, and extending in a second direction crossing the first direction to cross the display area.