Rollable Display Narrow Flexible Circuit Board Bezel Reduction
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Solution Overview
Problem
Conventional rollable display devices have larger driving portions, resulting in increased bezel size and volume due to the inability to completely roll up the display panels.
Innovation Solution
A rollable display device design featuring a narrow main flexible circuit board and main board configuration, where the driving portion is positioned on one side of the display region with a flexible connector and wiring region, allowing for reduced bezel size and volume by minimizing the width of the main flexible circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving portion is made larger to accommodate the wiring and connectors, then the connection reliability is improved, but the bezel size and device volume increase
Solution Approach 1:
The patent implements nesting by placing the flexible connector inside the display region rather than outside in the bezel area. The wiring region is integrated within the display panel structure, with the flexible connector folded and positioned within the display area, allowing the driving portion to be completely received without increasing bezel size. This nested arrangement resolves the contradiction by maintaining connection reliability while eliminating the volume increase that would result from a larger driving portion extending into the bezel.
Solution Approach 2:
The patent transitions from a two-dimensional planar arrangement where the driving portion extends outward into the bezel to a three-dimensional folded configuration. The flexible connector is folded back and positioned within the display region, utilizing the vertical and depth dimensions rather than only the horizontal bezel space. This dimensional change allows the wiring and connectors to be accommodated within the existing display area boundaries, preventing bezel size increase while maintaining reliable connections.
2Reliability
If the main flexible circuit board width is increased to improve signal transmission, then the connection stability is improved, but the lower bezel size and device volume increase
Solution Approach 1:
The main flexible circuit board is nested within the display region by folding it back and positioning it inside the display area rather than extending it outward into the lower bezel. This nested configuration allows the circuit board to maintain sufficient width for stable signal transmission while being contained within the display region boundaries, thereby preventing any increase in lower bezel size.
Solution Approach 2:
Instead of increasing the circuit board width in the horizontal dimension (which would increase bezel size), the patent utilizes the vertical and depth dimensions by folding the circuit board and positioning it in three-dimensional space within the display region. This allows the circuit board to have adequate dimensions for stable connections without expanding the horizontal bezel footprint.
Data Source
AI summary
The present invention provides a rollable display device and a rollable display apparatus. The rollable display device includes a rollable display panel and at least one main flexible circuit board. The rollable display panel includes a driving portion having at least one connection portion. The connection portion includes a wiring region including a plurality of external lines, and one end of each of the external lines is connected to the display region. The main flexible circuit board is arranged corresponding to a flexible connector, and a width of the main flexible circuit board is less than a predetermined value.