Scan Driving Circuit Segmentation for Narrow Bezel Displays
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Solution Overview
Problem
High-resolution liquid crystal display panels face challenges in designing narrow bezels due to increased gate lines and fan-out lines, leading to line breakage and signal delays, as the area occupied by the fan-out block expands and line widths become insufficient.
Innovation Solution
A scan driving circuit with multiple scan driving units, each comprising a fan-out line, switch sets, and control lines, where the control lines are connected to switches individually to control the fan-out line and scan lines, allowing for separate activation of scan lines, reducing the number of gate driving chips and layout space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display panel is increased, then the display quality is improved, but the area occupied by the fan-out block is increased and the line width of fan-out lines is reduced
Solution Approach 1:
The patent divides the scan driving function into multiple independent scan driving units, each responsible for driving a subset of scan lines. This segmentation allows the fan-out block to be distributed across multiple smaller units rather than concentrated in one large block, thereby reducing the area occupied by each fan-out block while maintaining high display resolution.
2Measurement precision
If the resolution of the display panel is increased, then the display quality is improved, but the line width of fan-out lines is reduced causing line broken or signal delay
Solution Approach 1:
By segmenting the scan lines into multiple groups, each served by a dedicated scan driving unit with its own fan-out line, the patent ensures that each fan-out line carries signal for fewer scan lines. This reduces the complexity and improves signal integrity, preventing line broken or signal delay issues that would occur with a single high-resolution fan-out block.
3Measurement precision
If the amount of gate lines is increased, then the display resolution is improved, but the amount of gate IC is increased occupying more area
Solution Approach 1:
The patent segments the gate driving function into multiple scan driving units that can be integrated into the display panel structure. Each unit drives a portion of the scan lines, distributing the gate IC requirements across multiple smaller integrated units rather than requiring one large external gate IC array, thereby reducing the total area occupied by gate driving components.
Solution Approach 2:
The scan driving units are integrated within the display panel structure itself, nesting the gate driving functionality inside the panel rather than requiring separate external gate ICs. This nested integration reduces the overall area occupied by gate driving components while maintaining high display resolution.
Data Source
AI summary
The present invention provides a scan driving circuit and display panel. The scan driving circuit comprises a plurality of scan driving units, each of which comprises a fan-out line, a plurality of switch sets, a plurality of control lines and a plurality of scan lines. The control lines are connected to at least one of the switches of each of the switch sets individually and the fan-out line is connected to the scan lines through the switch sets, such that the scan lines are turned on separately under control of the fan-out line and the control lines. By the above mentioned solution, the present invention drives a plurality of scan lines by one fan-out line such that an amount of the gate driving chips in the fan-out block and the layout space of the fan-out line can be reduced.