Flexible Display Panel Layout for Driver Circuit Bend Protection
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Solution Overview
Problem
Display devices, particularly flexible electronic paper, face issues with damage to driver circuits and limited bending due to the presence of driver circuits, which compromises their durability and usability.
Innovation Solution
The display device incorporates a flexible element substrate with a bent portion that houses the driver circuit, enhancing the strength of the circuit and reducing damage by integrating the driver circuit within the bent portion, and using a supporting portion to fix the substrate, ensuring robust connectivity through external connecting wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driver circuit is provided on a flexible substrate, then the display device can be bent, but the circuit may be damaged when bent
Solution Approach 1:
The substrate is divided into a flexible region and a rigid region, with the driver circuit placed on the rigid region. This segmentation allows the display device to be flexible while protecting the circuit from bending damage.
Solution Approach 2:
A rigid substrate acts as an intermediary carrier for the driver circuit, isolating it from the bending stresses of the flexible substrate while maintaining electrical connectivity through wiring.
2Device complexity
If the driver circuit is provided on the flexible substrate, then integration is improved, but the bending is limited by the driver circuit
Solution Approach 1:
The substrate is segmented into flexible and rigid regions, allowing the display portion to be highly integrated on the flexible substrate while the driver circuit resides on the rigid substrate, maintaining both integration and bending freedom.
Solution Approach 2:
The driver circuit is positioned in a different spatial region (rigid substrate) from the display portion (flexible substrate), resolving the conflict between integration and bending freedom through spatial separation.
3Strength
If the element substrate is bent to fit external connecting wiring, then the connecting strength is improved, but the substrate may be damaged
Solution Approach 1:
The rigid substrate acts as an intermediary that provides structural support during the bending process, enabling the substrate to be bent to fit external wiring without compromising integrity.
Solution Approach 2:
The rigid substrate provides beforehand structural reinforcement to the flexible substrate, cushioning it against damage during the bending operation required to connect external wiring.
Data Source
AI summary
To provide a display device including a flexible panel that can be handled without seriously damaging a driver circuit or a connecting portion between circuits. The display device includes a bent portion obtained by bending an element substrate. A circuit for driving the display device is provided in the bent portion and a wiring extends from the circuit, whereby the strength of a portion including the circuit for driving the display device is increased and failure of the circuit is reduced. Furthermore, the element substrate is bent in a connecting portion between an external terminal electrode and an external connecting wiring (FPC) so that the element substrate provided with the external terminal electrode fits the external connecting wiring, whereby the strength of the connecting portion is increased.