Pixel Electrode Segmentation for Micro-LED Alignment Precision
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Solution Overview
Problem
Existing display devices face challenges in efficiently fabricating subminiature light emitting elements with reliable inorganic crystal structures, which are essential for forming high-resolution light sources in display devices.
Innovation Solution
A display device design that includes a pixel structure with a first electrode, intermediate electrodes, and a second electrode, where light emitting elements are electrically connected between these electrodes, and switching elements are used to control the alignment and connection of the light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If subminiature light emitting elements are manufactured with small size for high-resolution display, then display resolution is improved, but manufacturing precision and alignment difficulty increase
Solution Approach 1:
The pixel electrode is divided into multiple segments (first electrode, intermediate electrodes, second electrode) that are arranged in sequence. This segmentation allows each electrode segment to be independently formed and aligned, reducing the overall alignment complexity while achieving high-resolution display requirements through the small size of individual light emitting elements
Solution Approach 2:
The switching element is configured to align the light emitting elements before they are electrically connected to the electrodes. This preliminary alignment action simplifies the subsequent fabrication process by ensuring proper positioning is achieved before the more complex electrical connection steps are performed
2Manufacturing precision
If switching elements are used to control alignment of light emitting elements, then alignment precision is improved, but device structure complexity increases
Solution Approach 1:
The switching element serves multiple functions: it controls the alignment of light emitting elements, regulates electrical connection between electrodes, and manages signal transmission. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity while achieving precise alignment
Solution Approach 2:
The switching element acts as an intermediary component between the control signal and the light emitting elements. It mediates the alignment process by receiving control signals and translating them into precise positioning actions, simplifying the overall control architecture while maintaining high alignment precision
Data Source
AI summary
A display device includes a pixel disposed in a display area; a first line electrically connected to the pixel; and a first control line disposed around the first line. The pixel includes a first electrode and a second electrode spaced apart from each other; at least one intermediate electrode including a first intermediate electrode disposed between the first electrode and the second electrode; light emitting elements electrically connected between a pair of adjacent electrodes among the first electrode, the second electrode, and the at least one intermediate electrode; and a first switching element electrically connected between the first intermediate electrode and the first line, the first switching element being controlled by a signal applied to the first control line.