Display Device Recess Structure for Robust Pixel Circuit Routing
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Solution Overview
Problem
Display devices lack a robust structure that can withstand external impacts while allowing for the design of a pixel circuit.
Innovation Solution
A display device with a recess pattern between pixels, where semiconductor layers and transistors are connected through a semiconductor connection pattern, and an etch stop pattern is included to enhance structural robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flat structure without recess patterns is used, then the pixel circuit design space is limited, but the structural robustness against external impacts is reduced
Solution Approach 1:
The insulating films are segmented by introducing recess patterns that divide the continuous insulating layer into multiple regions. This segmentation creates distinct spatial zones within the pixel structure, enabling independent routing of transistor connections and signal lines while maintaining overall structural integrity against external impacts.
Solution Approach 2:
The recess patterns extend in directional dimensions (first and second directions) within the insulating films, creating additional spatial pathways for circuit design. This dimensional approach allows transistor connections to be routed through multiple directions, increasing design flexibility without compromising the structural robustness provided by the recess configuration.
2Strength
If recess patterns are introduced to enhance structural robustness, then the manufacturing complexity increases
Solution Approach 1:
The recess patterns serve multiple functions simultaneously: they provide structural robustness against external impacts, create design space for pixel circuits, and enable directional routing of transistor connections. This multi-functionality reduces the need for additional separate structures, thereby limiting the increase in manufacturing complexity despite the enhanced robustness.
Solution Approach 2:
The recess patterns are strategically positioned within the insulating films at specific locations where structural reinforcement and circuit routing are needed. By concentrating the recess features in critical areas rather than uniformly throughout the structure, the manufacturing complexity is minimized while still achieving the desired structural robustness.
3Adaptability or versatility
If recess patterns are introduced to provide design space, then the manufacturing precision requirements increase
Solution Approach 1:
The recess patterns are formed within the insulating films during the manufacturing process before subsequent circuit elements are deposited. This preliminary formation of recess structures establishes the design space early in the manufacturing sequence, allowing for controlled precision requirements that are managed through sequential processing steps rather than requiring high precision across all manufacturing stages simultaneously.
Data Source
AI summary
A display device includes a first pixel, a second pixel disposed adjacent to the first pixel, and a recess pattern traversing between the first pixel and the second pixel when viewed from top. Each of the first pixel and the second pixel includes a first supply voltage line, a light-emitting element, a first transistor connected between the first supply voltage line and the light-emitting element, a second transistor connected between the first transistor and the light-emitting element, and a third transistor connected to the light-emitting element. The display device further includes a first semiconductor layer defining a channel of each of the first transistor, the second transistor, and the third transistor. The second transistor of the first pixel is connected to the third transistor of the second pixel via the first semiconductor layer. The first semiconductor layer overlaps the recess pattern between the first pixel and the second pixel.