Display Panel Side-Binding Notch Structure for Low Contact Impedance
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Solution Overview
Problem
The existing side binding structure of display panels in LCDs results in poor conductivity, low number of electrically conductive electrons, high contact impedance, and decreased yield due to limited effective conduction area.
Innovation Solution
A display panel design with a binding terminal on its side surface, featuring a first binding layer with first wirings and a first insulating layer having a notch, where a first protrusion portion is formed in the notch to increase the contact area with the binding terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the COF is bound to the side surface of the display panel, then the screen-to-body ratio can be increased, but the effective conduction area is limited causing poor conductivity and high contact impedance
Solution Approach 1:
The patent introduces a protrusion structure that extends vertically from the binding terminal surface, transforming a 2D contact interface into a 3D multi-level contact system. This dimensional change increases the effective conduction area without compromising the side-binding layout that achieves high screen-to-body ratio.
Solution Approach 2:
The binding terminal contact area is segmented into multiple regions through the protrusion structure, creating distinct contact zones that collectively increase the total conduction area. The protrusion divides the contact interface into upper and lower contact regions, improving overall conductivity.
2Length of moving object
If the film thickness and area of the wirings are limited, then the device can be kept thin, but the effective conduction area is reduced causing low number of electrically conductive electrons
Solution Approach 1:
The protrusion structure adds a vertical dimension to the contact area, increasing the number of conductive electrons available for conduction without increasing the horizontal footprint or device thickness. This allows maintaining thin device profile while improving electrical conduction capacity.
3Reliability
If the contact area between binding terminal and wirings is increased, then the conductivity is improved, but the device complexity increases
Solution Approach 1:
The protrusion structure is formed as an integral part of the binding terminal through self-aligned processes, eliminating the need for separate alignment steps and reducing overall manufacturing complexity despite the increased contact area.
Data Source
AI summary
The present disclosure provides a display panel and display device. The display panel includes a substrate, a first binding layer, and a first insulating layer. A first notch is formed in an area of the first insulating layer close to a side surface, a first protrusion portion is disposed on a binding terminal and formed in the first notch, and the first protrusion portion is in contact with a first surface, thereby improving an effective conductive area of the binding area, improving the conductivity of a line, increasing the number of conductive electrons, decreasing the contact impedance, reducing the risk of abnormal binding, and improving the product yield.