Display Device Insulating Pattern Layer Contact Area Control
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Solution Overview
Problem
Display devices with large display areas often experience deteriorated display quality due to the resistance of wires and electrodes, leading to deviations in the size of contact areas between auxiliary lines and electrodes, which can affect electrical characteristics.
Innovation Solution
The implementation of an insulating pattern layer with a controlled first opening size over the bus electrode, which limits the deviation in contact area size between the bus electrode and the second electrode of the light-emitting element, thereby maintaining high-quality electrical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser is used to create openings within intermediate layer, then contact area between bus electrode and electrode is formed, but deviation in size of contact area occurs
Solution Approach 1:
An insulating pattern layer is introduced as an intermediary between the intermediate layer and the bus electrode. This insulating pattern layer includes a first opening that overlaps the bus electrode, and the second electrode contacts the bus electrode through this first opening. The insulating pattern layer acts as a mediator that defines and controls the contact area size, preventing deviation caused by laser processing of the intermediate layer alone.
Solution Approach 2:
The structure is segmented into multiple functional layers: the intermediate layer with a second opening, the insulating pattern layer with a first opening, and the bus electrode. By dividing the contact formation process into separate layers with distinct openings, the patent achieves better control over the final contact area size and reduces deviation.
2Area of stationary object
If wire or electrode resistance is present in large display area, then electrical connection is established, but display quality deteriorates
Solution Approach 1:
The insulating pattern layer provides localized control over the contact area between the bus electrode and the second electrode. By precisely defining the contact region through the first opening, the patent optimizes the electrical connection quality in critical areas while maintaining the overall large display area, thus preventing display quality deterioration due to resistance.
Data Source
AI summary
A display device includes: a light-emitting diode including a first electrode, a second electrode arranged on the first electrode, and an intermediate layer between the first electrode and the second electrode; a bus electrode spaced apart from the first electrode of the light-emitting diode; a bank layer covering an edge of the first electrode and an edge of the bus electrode, and exposing a portion of the first electrode and a portion of the bus electrode; and an insulating pattern layer arranged on the bus electrode, and including a first opening overlapping a first opening, wherein the second electrode contacts the bus electrode through the first opening of the insulating pattern layer.