Display Electrode Layout Using Inverse-Taper Insulating Partitions
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Solution Overview
Problem
The existing processes for fabricating display devices are complex due to the need for patterning connection conductive layers, which complicates the separation of connection electrodes and conductive patterns.
Innovation Solution
The use of an insulating layer with a fixing portion and a partition portion, where the width of the upper surface is greater than the lower surface, allows for the separation of connection electrodes without the need for patterning, simplifying the fabrication process by using the insulating layer to separate the connection electrodes and conductive patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection conductive layers are patterned to separate connection electrodes, then electrode separation is achieved, but fabrication process complexity increases
Solution Approach 1:
An insulating layer is introduced as an intermediary element between connection electrodes. This insulating layer includes a fixing portion that contacts the light emitting element and a partition portion that separates adjacent connection electrodes. By using this insulating intermediary, the patent achieves reliable electrode separation without requiring complex patterning of conductive layers, thus resolving the contradiction between separation reliability and fabrication complexity
Solution Approach 2:
The insulating layer is segmented into two distinct functional portions: a fixing portion for securing the light emitting element and a partition portion for separating connection electrodes. This segmentation allows each portion to perform its specific function independently, achieving effective electrode separation through the insulating structure rather than through conductive layer patterning, thereby simplifying the fabrication process
2Ease of manufacture
If insulating layer with inverse taper shape is used, then electrode separation is simplified, but manufacturing precision requirements increase
Solution Approach 1:
The insulating layer is designed with an inverse taper shape where the width at the upper surface is greater than the width at the lower surface. This parameter change in the geometric dimensions creates an self-aligning structure that facilitates electrode separation. The tapered geometry provides mechanical guidance during assembly, reducing the stringency of positioning requirements compared to straight-walled structures, thus improving ease of manufacture while maintaining reasonable precision requirements
Data Source
AI summary
A display device comprises a first electrode and a second electrode disposed to be spaced apart from each other on a substrate, a light emitting element disposed between the first electrode and the second electrode, including a first end and a second end, an insulating layer disposed on the light emitting element, including a fixing portion disposed on at least a portion of the light emitting element and a partition portion surrounding the light emitting element, a first connection electrode electrically contacting the first end of the light emitting element, and a second connection electrode electrically contacting the second end of the light emitting element. A width of an upper surface of each of the fixing portion and the partition portion is greater than a width of a lower surface of each of the fixing portion and the partition portion.