Flexible AMOLED Display Panel with Segmented Drive Circuit
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Solution Overview
Problem
The stress on display devices in a stretched state is a major challenge, as the thin film transistors in active-matrix organic light-emitting diode (AMOLED) display panels change properties significantly under deformation, leading to ineffective driving of light-emitting devices and potential damage to the drive circuit.
Innovation Solution
The solution involves changing the structure of laminating the light-emitting device on the drive circuit in the original AMOLED structure, where the drive circuits are disposed outside the flexible display region, and the light-emitting device and drive circuit are connected through a flexible signal line, preventing the thin film transistor from bearing stress caused by stretching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the drive circuit is integrated with the light-emitting device in the AMOLED structure, then the device complexity is reduced, but the reliability deteriorates due to stress damage during stretching
Solution Approach 1:
The display panel is divided into a flexible display region containing light-emitting devices and a rigid pixel circuit region containing drive circuits. This spatial segmentation allows the flexible region to stretch while the rigid region remains stable, preventing stress damage to the drive circuits while maintaining overall device functionality.
Solution Approach 2:
A signal line serves as an intermediary connection between the flexible display region and the rigid pixel circuit region. This signal line transmits control signals and power from the drive circuits to the light-emitting devices while accommodating the mechanical difference between the flexible and rigid regions, protecting the drive circuits from stress.
2Adaptability or versatility
If the light-emitting device is disposed on the base substrate in the flexible display region, then the adaptability is improved for flexible applications, but the stress on the drive circuit increases during stretching
Solution Approach 1:
The display panel is divided into a flexible display region containing light-emitting devices and a rigid pixel circuit region containing drive circuits. This spatial segmentation allows the flexible region to stretch while the rigid region remains stable, preventing stress damage to the drive circuits while maintaining overall device functionality.
3Adaptability or versatility
If the thin film transistor bears the stress during stretching, then the flexible display function is achieved, but the drive circuit effectiveness deteriorates
Solution Approach 1:
The display panel is divided into a flexible display region containing light-emitting devices and a rigid pixel circuit region containing drive circuits. This spatial segmentation allows the flexible region to stretch while the rigid region remains stable, preventing stress damage to the drive circuits while maintaining overall device functionality.
Solution Approach 2:
A signal line serves as an intermediary connection between the flexible display region and the rigid pixel circuit region. This signal line transmits control signals and power from the drive circuits to the light-emitting devices while accommodating the mechanical difference between the flexible and rigid regions, protecting the drive circuits from stress.
Data Source
AI summary
A display panel is provided. The display panel includes a base substrate and a plurality of display units disposed on the base substrate. The display unit includes a signal line, a light-emitting device and a drive unit. The light-emitting device is disposed in a flexible display region of the base substrate, the drive unit is disposed in a pixel circuit region of the base substrate, and the signal line is connected with the light-emitting device and the drive unit.