Rollable Light-Emitting Panel Layout for Stable Signal Input
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Solution Overview
Problem
Rollable display devices face issues with abnormal signal input due to the signal input terminal being prone to being pulled or subjected to excessive stress during repeated extension and rolling, leading to reduced reliability.
Innovation Solution
A light-emitting device with a light-emitting panel featuring a non-rollable portion and a rollable portion, where the circuit board is fixed on the non-rollable portion to stabilize signal input, reducing stress and maintaining normal signal input during extension and rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the signal input terminal is arranged in the rollable portion of the extendable screen, then the device can be extended to larger display areas, but the signal input terminal is prone to being pulled to result in abnormal signal input when the extendable screen is extended or rolled
Solution Approach 1:
The extendable screen is divided into a rollable portion and a non-rollable portion. The signal input terminal is specifically arranged in the non-rollable portion, separating the flexible display area from the fixed signal input area. This segmentation allows the display to extend while keeping the signal terminal stationary and protected from stress.
Solution Approach 2:
A bending region is introduced as an intermediary between the rollable portion and the non-rollable portion. This bending region absorbs and isolates the stress generated during rolling and extension, preventing the stress from being transmitted to the signal input terminal located in the non-rollable portion.
2Adaptability or versatility
If the signal input terminal is disposed in a bending region of the extendable screen, then the device can accommodate rolling motion, but the stress in the bending region becomes overly large and the signal input is prone to be abnormal
Solution Approach 1:
The signal input terminal is extracted from the bending region and relocated to the non-rollable portion. This extraction removes the vulnerable signal terminal from the high-stress bending area, allowing the bending region to freely accommodate rolling motion without compromising signal input reliability.
3Shape
If there is no bending part in the rollable portion after being extended, then the extendable screen can maintain a flat display surface, but it is prone to cause the end to be squeezed by stress to result in abnormalities when the extendable screen is rolled
Solution Approach 1:
A bending part is preliminarily designed and incorporated into the rollable portion of the extendable screen. This bending part is positioned to absorb stress during rolling operations, preventing stress concentration at the ends of the screen and avoiding display abnormalities while maintaining a flat display surface when extended.
Data Source
AI summary
A light-emitting device includes a light-emitting panel and a circuit board. The light-emitting panel has a first side and a second side opposite to the first side, and includes a non-rollable portion and a rollable portion. The non-rollable portion includes a first region, a second region, and a bending region disposed between the first region and the second region. The first region is disposed on the first side. The first region and the second region are partially overlapped. The first region is connected between the bending region and the rollable portion. The circuit board is fixed onto the second side of the light-emitting panel and connected to the second region of the non-rollable portion.