Bent Bonding Portion for Increased Battery Capacity in Folding Displays
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Solution Overview
Problem
The OLED industry faces challenges with insufficient battery life, particularly in medium-sized folding mobile phone products, which restricts their development.
Innovation Solution
A display panel design that includes an array substrate with a bending portion and a first bonding portion, where the first bonding portion is bent to the non-display side of the display panel, and a circuit board with a second bonding portion that connects to the first bonding portion, optimizing the space usage to increase battery capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the display panel uses a conventional flat structure, then the manufacturing process is simple, but the battery capacity is insufficient
Solution Approach 1:
The bonding portion is bent along a bending line to extend in the thickness direction of the array substrate, transforming the spatial arrangement from a planar configuration to a three-dimensional structure. This dimensional change allows the bonding portion to protrude from the plane of the array substrate, creating additional space for battery accommodation without increasing the planar footprint, thereby resolving the contradiction between battery capacity and structural complexity
Solution Approach 2:
The circuit board is positioned to surround the bonding portion, with the battery arranged in the space between the circuit board and the array substrate. This nested arrangement allows multiple components (bonding portion, circuit board, battery) to occupy overlapping or adjacent spatial regions efficiently, maximizing space utilization and enabling increased battery capacity within the constrained device volume
2Volume of stationary object
If the bonding portion is bent to the non-display side, then more space is available for battery, but the manufacturing precision requirements increase
Solution Approach 1:
The bending line is predetermined and formed during the manufacturing process before final assembly, allowing the bonding portion to be pre-shaped with the correct geometry. This preliminary action ensures that the bending position and angle are controlled with high precision during manufacturing, eliminating the need for post-assembly adjustments and ensuring accurate alignment with the circuit board and battery compartment
3Area of stationary object
If the sticking-out portion is extended, then the bonding area increases, but the space for battery is reduced
Solution Approach 1:
Instead of extending the sticking-out portion in the planar direction (which would reduce battery space), the bonding portion is bent to extend in the thickness direction. This dimensional change allows the bonding area to be increased vertically without consuming additional planar space, thereby maintaining battery compartment volume while achieving sufficient bonding area for reliable electrical connection
Data Source
AI summary
The present disclosure provides a display panel and a method for manufacturing the display panel. The display panel includes a display array, a chip and a circuit board. The array substrate includes a display portion and a transition portion, a bending portion and a first bonding portion which are connected in sequence at an end of the display portion. The first bonding portion is bent through the bending portion to a side of the transition portion in a second direction Y. The circuit board includes a body portion and a second bonding portion. A second bonding electrode of the second bonding portion is connected to the first bonding electrode. The first bonding portion has a sticking-out portion at an end of the first bonding electrode connected to the second bonding electrode. The sticking-out portion extends along the first direction X.