Electroluminescent Display Panel with Segmented Scan Lines
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Solution Overview
Problem
Electroluminescent display panels face issues with image uniformity due to non-uniform component characteristics of sub-pixels, leading to the mura effect and inadequate charging of light-emitting elements, which affects image quality.
Innovation Solution
The electroluminescent display panel design includes a configuration with multiple scan lines and data lines that allow simultaneous charging of two adjacent rows of sub-pixels, using a scan driving unit and data driving unit to output scanning and data signals, ensuring sufficient charging time for correct image display, and a multiplexer to control data line conduction states for extended charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If scan lines are configured to connect to first and second rows of sub-pixels in two adjacent rows, then charging time for sub-pixels is extended, but device complexity increases due to additional data lines and driving units
Solution Approach 1:
The display panel is divided into multiple scan lines, each connecting to specific rows of sub-pixels. The data lines are segmented into first data lines for first rows and second data lines for second rows, allowing parallel charging operations while maintaining manageable complexity through systematic division
Solution Approach 2:
The patent introduces a temporal dimension by sequentially activating different scan lines and data lines in alternating periods. This allows the same physical infrastructure to serve multiple charging operations across different time slots, extending effective charging time without proportionally increasing hardware complexity
2Stability of the object's composition
If multiple scan lines and data lines are used to charge sub-pixels simultaneously, then image uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs multiplexers to dynamically switch between different data lines based on the active scan line, changing the electrical connection parameters during operation. This allows precise control of data signal routing to achieve uniform charging across all sub-pixels while using the same physical infrastructure
Solution Approach 2:
The systematic arrangement of scan lines and data lines with dedicated driving units creates a feedback-controlled charging system where each line is activated and charged in a controlled sequence, ensuring uniformity through regulated parameter changes rather than requiring higher manufacturing precision
3Measurement precision
If data lines are used to charge sub-pixels, then correct image display is achieved, but flicker issues occur due to inadequate charging time
Solution Approach 1:
The patent implements continuous charging action by overlapping the charging periods of different scan lines and data lines. While one scan line is being charged, other scan lines are simultaneously charged through different data lines, creating continuous useful action that eliminates gaps and flicker while ensuring complete charging for correct image display
Data Source
AI summary
An electroluminescent display panel includes a plurality of sub-pixels; a plurality of scan lines, each of the scan lines being electrically connected to a first row of sub-pixels and a second row of sub-pixels of two adjacent rows; a plurality of first data lines electrically connected to the first rows of sub-pixels of corresponding columns respectively; a plurality of second data lines electrically connected to the second rows of sub-pixels of corresponding columns respectively; a scan driving unit for outputting a plurality of scanning signals; and a data driving unit for outputting a plurality of dada signals; wherein the scanning signals sequentially turn on two adjacent rows of sub-pixels via the scan lines, the data signals on the first data lines charge the first rows of sub-pixels of the corresponding columns, and the data signals on the second data lines charge the second rows of sub-pixels of the corresponding columns.