Bent Pad Area Reduces Non-Display Space in Display Panels
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Solution Overview
Problem
Display panels require a significant non-display area for signal wires connecting to external circuit modules, increasing the overall size and reducing the display area effectively.
Innovation Solution
A display panel design featuring a pad area with an organic polymer layer and insulating layer, where the pad area can be bent, reducing the planar space required for signal input pads and allowing for a smaller non-display area by using a flexible printed circuit board connected to the signal input pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal wires are attached at the side portion of the display panel, then connectivity to external circuit modules is achieved, but the non-display area increases and overall planar dimension increases
Solution Approach 1:
The pad area is extended from the side portion of the display panel to an external region, utilizing spatial extension in another dimension. This allows signal wires to be connected outside the traditional boundary of the display panel, thereby reducing the non-display area required on the panel itself while maintaining connectivity to external circuit modules.
2Reliability
If pad area is extended from the side of non-display area, then connectivity to external circuit module is improved, but manufacturing complexity increases
Solution Approach 1:
The display panel structure is segmented into distinct functional areas: display area, non-display area, and extended pad area. This segmentation allows each region to be optimized independently - the pad area can be extended to facilitate connectivity while the display and non-display areas maintain their standard manufacturing processes, thereby managing overall manufacturing complexity through modular design.
Data Source
AI summary
A display apparatus includes an array substrate an opposite substrate facing the array substrate, and a liquid crystal layer disposed between the array substrate and the opposite substrate. The array substrate includes a display area, a non-display area, including first and second non-display areas, a pad area, the first non-display area adjacent to the pad area, a first base substrate disposed in the display area and in the non-display area, an organic polymer layer disposed in the pad area and in the first non-display area, a thin film transistor disposed in the display area, a pixel electrode connected to the thin film transistor, and a signal input pad connected to the thin film transistor and disposed on the organic polymer layer in the pad area. The organic polymer layer is disposed on the first base substrate in the first non-display area.