Flexible Display Bezel Reduction via Overlapping Substrate and Bending Gate Driver
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Solution Overview
Problem
Current flexible display devices face challenges in reducing the bezel area where images are not displayed, limiting their ability to provide a wide display area with reduced volume and weight, especially in large-scale applications like 100-inch TVs.
Innovation Solution
A flexible display device is designed with a flexible substrate that includes overlapping first and second portions connected by a bending portion, featuring organic light emitting diodes on each portion and a gate driver along the bending portion to drive gate lines, allowing for dual-direction image display and reducing the bezel area by integrating gate drivers and signal transmission lines within the bending portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If gate drivers and signal transmission lines are placed in the bezel area, then the display area is increased, but the bezel area where images are not displayed increases
Solution Approach 1:
The patent relocates gate drivers from the traditional planar bezel area to the bending portion, utilizing the third dimension (depth/folding) to resolve the spatial conflict between display area and component placement area
Solution Approach 2:
The flexible substrate is divided into distinct functional portions: a bending portion for housing gate drivers and signal transmission lines, and a display portion for image display, allowing independent optimization of each segment
2Volume of moving object
If the flexible substrate is bent to overlap portions, then the volume and weight are reduced, but the manufacturing complexity increases
Solution Approach 1:
Gate drivers and signal transmission lines are pre-positioned on the bending portion before the final folding operation, simplifying the assembly process and reducing manufacturing complexity despite the complex final geometry
Solution Approach 2:
The patent utilizes a flexible substrate that can be bent and folded without compromising structural integrity, enabling compact form factor while maintaining manufacturing feasibility through flexible material properties
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables a large-scale flexible display with reduced bezel width, facilitating the production of high-quality images and cost-effective large-scale TVs, such as 100-inch models, by allowing independent operation of each display unit and minimizing seam areas between them.
Implementation Method 1
a first display having a first organic light emitting diode on the first portion, the first display configured to display an image in a first direction; a second display having a second organic light emitting diode on the second portion
Data Source
AI summary
A flexible display device includes a flexible substrate includes first and second portions that overlap each other, and a bending portion connecting the first portion with the second portion. A first display having a first organic light emitting diode is on the first portion, the first display configured to display an image in a first direction, and a second display having a second organic light emitting diode is on the second portion, the second display configured to display an image in a second direction. A gate driver is on the bending portion, and is configured to drive gate lines in each of the first and second displays.