Display Panel GOA and DEMUX Circuit for Narrow Lower Frame
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Solution Overview
Problem
Current DEMUX circuit designs in display panels struggle to further narrow lower frames while improving display resolutions, limiting the achievement of narrower frame designs.
Innovation Solution
The implementation of a display panel with cascading gate driver on array units, DEMUX switching units, and a DEMUX control signal generating circuit, which includes thin film transistors and branched control signal lines, allows for a horizontal sub-pixel arrangement and dot inversion driving mode, reducing frame space by integrating GOA units and DEMUX control signal generating circuits into a single drive chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If DEMUX circuit design is used to reduce data lines, then device complexity is reduced, but lower frame width cannot be further narrowed
Solution Approach 1:
The patent changes the arrangement dimension of sub-pixels from traditional vertical stacking to horizontal arrangement. By arranging first, second, and third sub-pixels horizontally along the data line direction, the design transforms the spatial dimension utilization, allowing the lower frame to be shared across multiple sub-pixel rows and thereby reducing the lower frame width while maintaining signal multiplexing functionality.
Solution Approach 2:
The patent inverts the traditional sub-pixel arrangement logic by placing sub-pixels of the same color (first, second, third sub-pixels) horizontally adjacent to each other rather than vertically stacked. This inversion of the arrangement paradigm enables the lower frame to serve multiple horizontal rows simultaneously, reducing the required lower frame width while preserving the DEMUX functionality.
2Length of stationary object
If horizontal sub-pixel arrangement is implemented, then lower frame space is reduced, but display quality must be maintained
Solution Approach 1:
The patent implements dot inversion driving mode where adjacent sub-pixels with the same color are driven with alternating polarities. This periodic action compensates for the effects of reduced lower frame width by periodically inverting the driving polarity to maintain uniform display quality across the screen, preventing image sticking and ensuring reliable display performance despite the compact horizontal arrangement.
Solution Approach 2:
The patent changes the driving parameters by implementing dot inversion mode with alternating polarities for adjacent sub-pixels. This parameter change compensates for the reduced lower frame width effects and maintains display quality by dynamically adjusting the driving polarity to prevent image artifacts and ensure uniform visual performance across all horizontally arranged sub-pixels.
Data Source
AI summary
A display panel includes an array substrate, a plurality of cascading GOA units, a plurality of DEMUX switching units, and a DEMUX control signal generating circuit. One DEMUX switching unit includes a scanning signal input port, at least two control signal input ports, and at least two scanning signal output ports. One GOA unit is connected to the scanning signal input port, the DEMUX control signal generating circuit is connected to the at least two control signal input ports, and the scanning signal output ports are connected to corresponding gate lines.