Display Alignment Pattern for Under-Panel Component Transmission
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Solution Overview
Problem
Existing display devices face challenges in accurately aligning component areas with their corresponding components, particularly in ensuring precise alignment for optimal light transmission and image quality, especially when components like sensors or cameras are integrated.
Innovation Solution
A display device design that includes a substrate with distinct transmission portions and areas, an insulating layer with specific holes exposing alignment patterns, and display elements like pixel electrodes and thin-film transistors, where alignment patterns are used to accurately align components with their respective areas, utilizing materials like polysilicon or conductive oxides for the alignment patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transmission portions are arranged in component areas to allow light transmission, then light transmission capability is improved, but alignment precision between component areas and components deteriorates
Solution Approach 1:
The component area is divided into a first component area with a first transmission portion and a second component area surrounding it with a second transmission portion. The insulating layer is segmented with first and second transmission holes corresponding to these portions. This segmentation allows different transmission characteristics in different regions while maintaining alignment through the alignment pattern in the second transmission portion.
Solution Approach 2:
An alignment pattern is introduced as an intermediary element arranged on the substrate and overlapping the second transmission hole. This alignment pattern serves as a reference marker that mediates between the transmission portion structure and the component positioning, enabling precise alignment without compromising light transmission through the transmission portions.
2Manufacturing precision
If alignment patterns are added to improve component alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The alignment pattern is merged with the existing substrate structure and the second transmission portion. The alignment pattern is arranged on the substrate and overlaps with the second transmission hole, combining the alignment function with the existing transmission structure rather than adding a completely separate alignment mechanism.
Solution Approach 2:
The second transmission portion serves multiple functions: it allows light transmission (like the first transmission portion) and simultaneously provides a location for the alignment pattern to enable component alignment. This multi-functionality reduces the need for separate alignment structures and minimizes overall device complexity.
Data Source
AI summary
A display device includes: a substrate including a first component area in which a first transmission portion is arranged, a second component area that surrounds the first component area and in which a second transmission portion is arranged, and a main display area surrounding at least a portion of the second component area; an insulating layer having a first transmission hole corresponding to the first transmission portion and a second transmission hole corresponding to the second transmission portion, the first transmission hole and the second transmission hole exposing an upper surface of the substrate; a plurality of display elements arranged on the insulating layer and corresponding to the first component area, the second component area, and the main display area; and an alignment pattern arranged on the substrate and overlapping the second transmission hole and configured to align a component with the second component area.