Driver IC Segmentation for Flexible Display Durability
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Solution Overview
Problem
Flexible display devices face damage to integrated circuits when bent or folded due to the rigidity of traditional substrates and driver IC designs, which limits their application in portable and flexible devices like electric cards and passports.
Innovation Solution
The driver integrated circuit (IC) is divided into functional blocks such as scan, data, power generating, and memory blocks, arranged along the bending axis of a flexible substrate, connected by metal wiring to prevent damage during horizontal or vertical bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driver IC is integrated into a flexible display device, then the device achieves portability and flexibility, but the driver IC may be damaged when bent or folded
Solution Approach 1:
The driver IC is divided into multiple functional blocks (scan driver block, data driver block, power generating block, memory block) that are separately arranged along the bending axis of the flexible substrate. This segmentation allows each block to be positioned in a way that minimizes bending stress concentration, preventing damage while maintaining flexibility
Solution Approach 2:
The functional blocks are arranged in a distributed pattern along the bending axis rather than being concentrated in a single location. This spatial distribution along the length of the substrate allows the driver IC to accommodate bending deformations without creating stress concentration points that would cause damage
2Reliability
If the driver IC is divided into functional blocks arranged along the bending axis, then damage during bending is prevented, but the device complexity increases
Solution Approach 1:
Multiple functional blocks (scan driver, data driver, power generating, and memory blocks) are integrated onto a single flexible substrate, forming a unified driver IC structure. This merging approach distributes the functional blocks along the bending axis to prevent damage while maintaining a cohesive integrated circuit design rather than using separate discrete components
Data Source
AI summary
Provided is a display device including: a flexible substrate; a display unit disposed on the substrate; and a driver integrated circuit (IC) to drive the display unit. The driver IC is divided into separate blocks that are disposed on opposing sides of a bending axis of the substrate.