Light-Emitting Element Alignment Between Display Electrodes
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Solution Overview
Problem
Existing display devices face challenges in aligning light-emitting elements between electrodes, which affects the alignment and luminance of light-emitting layers within sub-pixels.
Innovation Solution
The display device incorporates an organic ligand with a specific polarity bonded to the light-emitting elements, allowing for improved alignment by ensuring one end of each element electrically contacts one electrode and the other end contacts the opposite electrode, with the ligand bonded to the insulating film at specific locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting elements are disposed on electrodes without polarity control, then the device structure is simple, but the alignment of light-emitting elements between electrodes is poor
Solution Approach 1:
The patent applies local quality by bonding organic ligands with specific polarity to specific portions (ends) of the light-emitting elements rather than uniformly across the entire element. This localized polarity assignment enables directional alignment with electrodes while maintaining structural simplicity elsewhere in the device.
Solution Approach 2:
The patent changes the polarity parameter of the light-emitting elements by introducing organic ligands with specific polarity characteristics. This parameter modification enables the elements to respond to electric fields and align properly between electrodes, solving the alignment issue without fundamentally redesigning the element structure.
2Manufacturing precision
If organic ligand is bonded to all surfaces of light-emitting elements, then alignment is improved, but manufacturing complexity increases
Solution Approach 1:
The patent bonds organic ligands only to specific portions (ends) of the light-emitting elements rather than all surfaces. This selective bonding reduces manufacturing complexity by limiting the bonding process to critical areas while still achieving the alignment function.
Solution Approach 2:
The patent performs preliminary bonding of organic ligands to the ends of light-emitting elements during the manufacturing process, before the elements are disposed on electrodes. This preliminary action ensures proper alignment is built into the structure, simplifying subsequent manufacturing steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the alignment of light-emitting elements, improving luminance by ensuring the light-emitting layers are positioned centrally within sub-pixels, thereby enhancing display quality.
Implementation Method 1
an organic ligand having a polarity that is bonded to a portion of each of the light-emitting elements
Implementation Method 2
The end of each of the light-emitting elements may electrically contact the first electrode, and the another end of each of the light-emitting elements may electrically contact the second electrode
Data Source
AI summary
Embodiments provide a display device and a method for manufacturing the same. The display device includes a first electrode and a second electrode disposed on a substrate, spaced apart from each other, and extending in a direction, light-emitting elements disposed on the first electrode and the second electrode, an organic ligand having a polarity that is bonded to a portion of each of the light-emitting elements, a first connection electrode electrically connected to an end of each of the plurality of light-emitting elements, and a second connection electrode electrically connected to another end of each of the plurality of light-emitting elements. The end of each of the plurality of light-emitting elements electrically contacts the first electrode, and the another end of each of the plurality of light-emitting elements electrically contacts the second electrode.