Segmented Lead Wire Width Compensation for AMOLED Display Uniformity
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Solution Overview
Problem
The immature integrated circuit (IC) drive technology for active-matrix organic light-emitting diodes (AMOLEDs leads to resistance differences between source lines, causing display issues like red display images and bright lines, which current gamma correction techniques struggle to fully address due to technical specification limitations.
Innovation Solution
The display panel design incorporates a lead wire part with first lead wires and compensation parts, where the first lead wires have a different width and are closer to the fan-out part, and the compensation parts have varying lengths and widths to reduce resistance differences between data lines, ensuring gentle resistance changes and improved display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lead wire design is used, then device complexity is low, but resistance differences between data lines cause display uniformity deterioration
Solution Approach 1:
The lead wire is segmented into multiple sections with different widths: a first lead wire section with a first width and a second lead wire section with a second width. This segmentation allows different portions of the lead wire to have different resistance characteristics, compensating for resistance differences between data lines without requiring a completely complex redesign of the entire lead wire system.
Solution Approach 2:
Different sections of the lead wire are assigned different local properties (widths) to achieve specific functional goals. The first lead wire section has a first width optimized for certain electrical characteristics, while the second lead wire section has a second width optimized for other characteristics. This local differentiation allows the lead wire to compensate for resistance variations between data lines while maintaining overall structural feasibility.
2Reliability
If lead wire width is increased to reduce resistance, then electrical conductivity improves, but manufacturing precision requirements increase
Solution Approach 1:
Instead of uniformly increasing the entire lead wire width (which would demand high precision control across the whole structure), the lead wire is segmented into sections with different widths. Each section can be manufactured with more relaxed precision requirements for its specific width, while collectively achieving the desired electrical conductivity and resistance compensation effect.
Solution Approach 2:
Different sections of the lead wire have different local widths optimized for their specific functions. This allows each section to be manufactured with appropriate local precision requirements rather than requiring uniform high precision across the entire lead wire structure, thereby reducing overall manufacturing precision demands while maintaining electrical performance.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a display part including a plurality of data lines; a fan-out part including a plurality of fan-out lines; and a lead wire part including a plurality of first lead wires which are respectively connected with the plurality of data lines through the plurality of fan-out lines, and the plurality of fan-out lines are fanned out between the lead wire part and the display part. The plurality of first lead wires each include a first lead wire subpart and a compensation part to form a plurality of first lead wire subparts and a plurality of compensation parts, the plurality of first lead wire subparts are respectively connected with the plurality of compensation parts; the first lead subparts (WS1) have a width different from that of the compensation parts.