Flexible Display Bump Layout for Reliable Driver Mounting
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Solution Overview
Problem
Display devices with flexible substrates face issues with durability and reliability due to detachment of the display unit when the substrate is bent during the mounting of the driving circuit, especially during pressing and heating processes.
Innovation Solution
The display device incorporates a flexible base layer with a specific arrangement of bumps on the driving circuit, including first, second, and third bumps arranged in a particular pattern to distribute pressure evenly and prevent bending of the substrate, ensuring the display unit remains attached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate is made of flexible material to enable bending, then adaptability is improved, but the display unit may detach from the substrate during pressing and heating processes
Solution Approach 1:
The patent applies preliminary action by pre-positioning multiple bumps (first, second, and third bumps) at specific locations on the substrate before the pressing and heating mounting process. These bumps are strategically arranged to provide preliminary support and pressure distribution, preventing substrate bending and display unit detachment during the subsequent mounting operation. The bumps are formed in advance as part of the substrate structure or as separate components attached before the driving circuit mounting process.
2Manufacturing precision
If pressing and heating processes are applied to mount the driving circuit, then manufacturing precision is improved, but the substrate bends causing display unit detachment
Solution Approach 1:
The patent applies local quality by creating localized support structures (bumps) at specific regions of the substrate where needed during the mounting process. Instead of making the entire substrate rigid, only specific local areas have enhanced structural properties through the presence of bumps. This allows the substrate to maintain flexibility in non-bump areas while providing localized rigidity and support at bump locations to prevent bending during pressing and heating operations.
Data Source
AI summary
The display device includes a flexible base layer including a first region and a second region located around the first; a display unit on one surface of the first region and including a light emitting element; a driving circuit on the second region and including a plurality of first bumps arranged in a first row and a plurality of second bumps arranged in a second row, the driving circuit includes a third bump in the first row and disposed outward relative to the plurality of first bumps, a first and second reference bump each disposed at a center of the plurality of first and second bumps that are disposed along a reference line defined in a column direction vertically intersecting a row direction, the remaining first and second bumps excluding the first reference bump and the second reference bump arranged to have a preset slope with respect to the reference line.