Liquid Crystal Display Panel Gate Connection Line Overlap
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Solution Overview
Problem
Liquid crystal display devices of the fringe field switching (FFS) mode face challenges in reducing frame width without compromising transmittance, especially as pixel size decreases due to high resolution, and are affected by peripheral wires that alter the electric field.
Innovation Solution
The design includes a liquid crystal display panel with gate wires and source wires intersecting on one side, with gate connection lines formed in the display region and overlapping with source wires, and a connection portion that electrically connects gate wires to gate connection lines, allowing for frame-width reduction without reducing transmittance by minimizing the overlap area between gate and source wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If gate connection lines are formed in the display region to enable frame-width reduction, then frame width is reduced, but transmittance decreases due to additional wires in the display area
Solution Approach 1:
The gate connection lines are merged with the source wire routing by having them overlap in the display region. This combines the functions of gate signal transmission and source wire routing into a shared spatial path, reducing the total wire area occupation while maintaining frame-width reduction benefits
Solution Approach 2:
The gate connection lines are positioned in a different layer dimension, overlapping with source wires in the plan view but separated vertically through interlayer insulating films. This dimensional arrangement allows multiple signal paths to coexist in the same planar space without interfering with light transmittance
2Measurement precision
If pixel size is reduced to achieve high resolution, then resolution is improved, but frame-width reduction becomes more difficult due to increased wire density
Solution Approach 1:
By merging gate connection lines with source wire routes and having them overlap in the display region, the patent reduces the total wire area occupation. This is particularly beneficial for high-resolution displays where pixel density increases and frame-width reduction becomes more challenging
Solution Approach 2:
The overlapping region serves multiple functions: it acts as both gate connection path and source wire route, and the interlayer insulating films provide both electrical insulation and structural support. This multi-functionality reduces the overall space required for wiring in high-resolution displays
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables frame-width reduction in liquid crystal display devices without deteriorating display performance or transmittance, even at high resolutions, by optimizing the arrangement of wires and electrodes to maintain effective electric field control.
Implementation Method 1
a liquid crystal display device has a liquid crystal layer formed between two substrates
Implementation Method 2
applying a fringe electric field (oblique electric field containing both components of a horizontal electric field and a vertical electric field) to the liquid crystal layer
Implementation Method 3
a transparent pixel electrode and a transparent common electrode are formed on the array substrate on one side, and the transparent pixel electrode and the transparent common electrode are vertically overlapped
Data Source
AI summary
Gate connection lines connected to gate wires in a display region are formed so as to have a region overlapped with source wires. According to such a structure, both of frame-width reduction and display performance of a liquid crystal display panel may be realized.