Display Panel Corner Circuit Segmentation for Notch Overlap
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing dead space without overlapping the notch of a cover panel with the driving circuit, which can affect image quality.
Innovation Solution
A display panel design featuring a substrate with a display area and a corner area, where the corner area has curved or polygonal sides and includes a driving portion with normal stages and dummy stages. The dummy stages are arranged in the notch area defined by an alignment mark, allowing the normal stages to avoid overlapping with the notch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the dead space is reduced to increase the display area, then the display area is improved, but the notch of the cover panel may overlap with the driving circuit causing image quality degradation
Solution Approach 1:
The driving circuit is segmented into normal stages and dummy stages. The dummy stages are specifically positioned in the notch area to occupy the space that would otherwise cause overlap, while the normal stages are arranged to avoid the notch area entirely. This segmentation allows the driving circuit to fill the available space without compromising image quality.
Solution Approach 2:
Dummy stages serve as intermediary elements between the normal driving circuit stages and the notch area. These dummy stages occupy the notch area and prevent direct overlap between the functional driving circuit and the cover panel notch, thereby maintaining image quality while maximizing display area utilization.
2Reliability
If the driving circuit is arranged to avoid the notch area, then image quality is improved, but the dead space increases reducing the effective display area
Solution Approach 1:
The notch area, which would normally create harmful overlap and degrade image quality, is converted into a beneficial space by placing dummy stages there. This transforms the previously harmful notch region into a useful area that houses non-critical circuit elements, thereby eliminating dead space while maintaining image quality.
Solution Approach 2:
Different regions of the driving circuit are assigned different functions based on their location. The normal stages are positioned in areas that do not overlap with the notch to ensure high image quality, while the dummy stages are specifically placed in the notch area to utilize otherwise wasted space. This local differentiation of function optimizes both image quality and space utilization.
3Reliability
If dummy stages are added to occupy the notch area, then the overlap between driving circuit and notch is prevented, but the device complexity increases
Solution Approach 1:
Dummy stages are designed as simple, functionally minimal circuit elements that serve their purpose of occupying space and preventing overlap. They are essentially simplified versions of normal stages that require fewer resources and have reduced functionality, making them a cost-effective solution to the alignment problem without significantly increasing overall device complexity.
Data Source
AI summary
A display panel includes: a substrate comprising a display area and a corner area, the corner area located outside the display area and having curved sides or polygonal sides; a plurality of pixels in the display area in a first direction and a second direction intersecting the first direction; a driving portion in the corner area and comprising a plurality of normal stages and a plurality of dummy stages between the plurality of normal stages, the plurality of normal stages being configured to output electrical signals to the plurality of pixels; and an alignment mark in the corner area, wherein the corner area includes a notch area that is defined based on the alignment mark, and some of the plurality of dummy stages are in the notch area.