Display Device Data Line Segmentation for Coupling Reduction
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Solution Overview
Problem
Display devices face issues with data coupling during charging, leading to visible luminance differences due to voltage variations.
Innovation Solution
The display device incorporates first, second, and third emission areas with corresponding pixel electrodes, and uses first and second data lines that are spaced apart to reduce data coupling, with a demultiplexer to divide and output input signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If data lines are closely spaced to increase pixel density, then manufacturing precision and area utilization improve, but data coupling occurs during charging causing luminance differences
Solution Approach 1:
The patent divides the data line system into multiple separate groups (first data lines and second data lines) with different spatial arrangements. Each group is charged independently through separate switching circuits, preventing coupling between adjacent data lines while maintaining high pixel density through optimized layout of the segmented groups.
Solution Approach 2:
The patent implements dynamic control of data line charging through switching circuits that can selectively charge first and second data lines at different times. This dynamic switching allows adjacent data lines to be charged alternately rather than simultaneously, eliminating coupling effects while maintaining the ability to drive high-density pixel arrangements.
2Reliability
If data lines are spaced apart to prevent data coupling, then reliability improves, but device complexity and area increase
Solution Approach 1:
The patent merges the functions of multiple data line groups into a unified display structure where first and second data lines work together to drive pixel electrodes. The switching circuits are integrated into the existing pixel circuit architecture, combining data line driving functions with pixel control circuits to reduce overall device complexity despite having multiple data line groups.
Solution Approach 2:
The switching circuits serve multiple functions: they control the charging of different data line groups, manage the timing of voltage application to pixel electrodes, and coordinate the operation of first and second data lines. This multi-functionality reduces the need for separate control mechanisms for each data line group, simplifying the overall device architecture.
Data Source
AI summary
A display device includes first emission areas, second emission areas, and third emission areas for respectively emitting colors of light, first pixel electrodes, second pixel electrodes, and third pixel electrodes overlapping the first emission areas, the second emission areas, and the third emission areas, respectively, first data lines respectively connected to the first pixel electrodes, and overlapping some of the first emission areas, second data lines respectively electrically connected to the second pixel electrodes, overlapping some others of the first emission areas, and being spaced apart from the first data lines, and a demultiplexer configured to divide and output corresponding portions of an input, which is received from one fan-out line, to the first data lines and the second data lines.