Foldable Display Wiring Layout for Low-Resistance Frame Routing
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Solution Overview
Problem
Existing display devices require wires with cutouts at the folding portion to prevent breaks, leading to high resistance and potential degradation in display quality.
Innovation Solution
The display device incorporates a first routing wire crossing the folding portion and a flexible second routing wire that connects outer and inner terminals without passing through the folding portion, reducing wire resistance and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wire with cutouts is provided at the folding portion to prevent breaks, then reliability is improved, but wire resistance increases
Solution Approach 1:
The wire routing is divided into two separate paths: a first routing wire that crosses the folding portion and a second routing wire that bypasses it. This segmentation allows each wire to have optimized characteristics - the first wire can be designed for reliability at the fold, while the second wire provides a low-resistance alternative path.
Solution Approach 2:
An inner terminal is introduced as an intermediary connection point within the folding portion. This terminal enables the second routing wire to connect outer terminals to the display region without passing through the folding portion, thereby providing a low-resistance path while maintaining reliability through the alternative routing option.
2Volume of moving object
If the frame region is folded for frame narrowing, then device compactness is improved, but wire resistance increases
Solution Approach 1:
The electrical connection path is segmented into two options: routing through the folding portion or bypassing it. This allows the system to maintain compact folded form factor while providing a bypass path for low-resistance connections when needed.
Solution Approach 2:
The second routing wire utilizes the spatial dimension outside the folding portion to create an alternative connection path. By routing the wire in a different spatial location (bypassing the fold rather than crossing it), the design achieves both compactness and low resistance.
3Use of energy by moving object
If a simple straight wire is used at the folding portion, then wire resistance is lowered, but the wire may break at the folding portion
Solution Approach 1:
The inner terminal acts as a mediator that enables straight, low-resistance wire routing by providing connection points that eliminate the need for wires to bend or cross the folding portion. This intermediary structure allows simple straight wires to achieve both low resistance and break resistance.
4Device complexity
If the second routing wire passes through the folding portion, then routing simplicity is improved, but wire resistance increases and noise entry may occur
Solution Approach 1:
The second routing wire extracts the connection function from the folding portion area by bypassing it entirely. This extraction eliminates the harmful effects (resistance increase and noise entry) associated with wires passing through the fold, while the inner terminal maintains the necessary electrical connection.
Data Source
AI summary
A display device includes: a display region; a frame region comprising a folding portion, the frame region being disposed around the display region; an outer terminal comprising a first outer terminal and a second outer terminal in the frame region, the first and second outer terminals being disposed sequentially on an outside in such a manner that the first outer terminal is closer to the display region than the second outer terminal is, the outside being more remote from the display region than the folding portion is; a first routing wire crossing the folding portion to electrically connect together the first outer terminal and an inner wire that is disposed in the display region; at least one inner terminal disposed inside the folding portion in the frame region; and a second routing wire that is flexible, the second routing wire electrically connecting at least the second outer terminal out of the first and second outer terminals to the at least one inner terminal without passing through the folding portion.