Display Panel Frame Width Reduction via GOA Substrate Stacking
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Solution Overview
Problem
Conventional display panels require a large frame width due to the need for wider GOA signal traces and the requirement for conductive glues to cure properly, which can lead to either solid or slit traces depending on overlap with these traces.
Innovation Solution
The display panel design includes a frame area where the GOA circuit and signal trace are disposed on the color filter substrate, overlapping the fanout area on the array substrate, and connected via conductive glue, reducing the frame width by allowing solid trace design and efficient curing of conductive glues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wider GOA signal traces are used to reduce RC loading, then signal transmission quality is improved, but frame width increases
Solution Approach 1:
The patent moves the GOA circuit from the array substrate to the color filter substrate, utilizing the vertical stacking dimension. This allows the GOA signal traces to be positioned on a different layer, eliminating the need for wide traces on the array substrate while maintaining signal quality through the stacked configuration and conductive glue connections.
Solution Approach 2:
The patent introduces conductive glue as an intermediary connection medium between the GOA circuit on the color filter substrate and the array substrate. This intermediary enables electrical connection without requiring wide traces, as the conductive glue provides the necessary conductivity through the bonding interface.
2Ease of manufacture
If conductive glues overlap GOA signal traces, then curing is enabled, but trace integrity is compromised due to slitting
Solution Approach 1:
By relocating the GOA circuit to the color filter substrate, the patent creates a vertical separation between the conductive glue bonding area and the GOA signal traces. The conductive glue is applied at the bonding interface between substrates, while the GOA traces are positioned on the color filter substrate, eliminating the horizontal overlap that causes slitting.
Solution Approach 2:
The patent segments the display panel structure into distinct functional layers: the array substrate, the bonding interface with conductive glue, and the color filter substrate containing the GOA circuit. This segmentation allows the conductive glue to perform its bonding and curing function without interfering with the continuity of the GOA signal traces.
3Reliability
If conductive glues do not overlap GOA signal traces, then trace integrity is maintained, but curing of conductive glues is insufficient
Solution Approach 1:
The patent resolves this contradiction by using vertical stacking to separate the functions: the conductive glue overlaps the array substrate bonding area for proper UV curing, while the GOA signal traces are positioned on the color filter substrate above, eliminating the need for horizontal overlap and thus maintaining trace integrity.
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 design reduces the frame width at both sides of the display panel, improving manufacturing efficiency and eliminating the need for a large frame, while maintaining effective trace integrity and curing of conductive glues.
Implementation Method 1
Since the conductive glues need to be cured by ultraviolet (UV) irradiation
Data Source
AI summary
A display panel is provided. The display panel includes a frame area, and the frame area includes an array substrate and a color filter substrate. The array substrate includes a fanout area configured to dispose a fanout trace. The color filter substrate is disposed opposite to the array substrate. The color filter substrate includes a gate driver on array (GOA) circuit and a signal trace disposed at a side of the GOA circuit. The GOA circuit is electrically connected to the signal trace. The GOA circuit and the signal trace both overlap the fanout area.