Rollable Display Flexible Panel Segmentation and Dual Power Supply
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Solution Overview
Problem
Existing rollable display technologies face challenges in smoothly rolling and unrolling flexible display panels without damaging the rigid components, such as printed circuit boards and driving chips, and in preventing voltage drops due to single-sided power connections.
Innovation Solution
A rollable display apparatus design featuring a flexible panel with a main panel and a dummy panel connected via an adhesive film, where the first and second printed circuit boards and driving chips are strategically positioned outside the winding area, connected to pads on both sides of the panels, and a conductive capping layer is used to prevent light transmission and facilitate smooth rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid components (printed circuit boards and driving chips) are connected to the flexible display panel, then electrical connection and control functions are achieved, but the rolling and unrolling operation becomes difficult and components may be damaged
Solution Approach 1:
The flexible panel is divided into a main panel containing the display and a dummy panel containing the wire, with connection pads at both ends. This segmentation allows the rigid printed circuit boards and driving chips to be connected only to the main panel while the dummy panel extends to the winding area without components, enabling smooth rolling.
Solution Approach 2:
The rigid components (printed circuit boards and driving chips) are extracted from the flexible panel structure and positioned separately, connected only to the main panel. The dummy panel is used to extend the flexible structure into the winding area without these rigid components, resolving the conflict between electrical connection and rolling operation.
2Device complexity
If power connection is made only at one end of the flexible panel, then device structure is simplified, but voltage drops occur during rolling causing display abnormalities
Solution Approach 1:
The power connection is segmented into two locations: pads at the first end and pads at the second end of the flexible panel. Both ends are connected to printed circuit boards, creating dual power supply paths that prevent voltage drops during rolling operations while maintaining structural simplicity.
Data Source
AI summary
A rollable display apparatus includes a flexible panel including a main panel with a display and a dummy panel with a wire connected to the display, a housing to accommodate the flexible panel, a rotatable rolling drum in the housing and coupled to a first end of the flexible panel, a supporting base moveable into and out of the housing and coupled to a second end of the flexible panel, and a printed circuit board connected to the second end of the flexible panel, the printed circuit board being on the supporting base.