Display Device Dummy Pattern Insulation for Static Electricity
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Solution Overview
Problem
Display devices face performance degradation due to static electricity generated from active patterns in pixel circuits, leading to potential damage and reduced display quality.
Innovation Solution
The implementation of a display device design featuring an active pattern with a first region, a second region, and a third region, where a first conductive pattern with a dummy portion overlapping the third region is electrically insulated from the active pattern and conductive layers, reducing static electricity and enhancing display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive pattern is placed on the active pattern to define a transistor, then the transistor function is achieved, but static electricity is generated from the active pattern causing pixel circuit damage
Solution Approach 1:
An insulating pattern is introduced as an intermediary layer between the active pattern and the conductive pattern. This insulating pattern prevents direct electrical contact while allowing the conductive pattern to define the transistor structure, thereby eliminating static electricity generation from the active pattern while maintaining transistor functionality.
Solution Approach 2:
The structure is segmented into distinct functional layers: the active pattern layer, the insulating pattern layer, and the conductive pattern layer. This segmentation separates the electrical function (conductive pattern) from the active region, preventing harmful electrical interactions while maintaining both functions independently.
2Reliability
If the conductive pattern directly contacts the active pattern, then electrical connection is achieved, but the active pattern generates static electricity that damages the pixel circuit
Solution Approach 1:
The insulating pattern serves as a protective intermediary that blocks the transmission of static electricity from the active pattern to the conductive pattern and pixel circuit, while allowing the transistor to function through capacitive coupling or other non-direct-contact mechanisms.
Solution Approach 2:
The insulating pattern is placed beforehand between the active and conductive patterns to prevent static electricity damage before it can occur. This proactive protective measure cushions against potential electrical harm while maintaining device functionality.
Data Source
AI summary
A display device includes a substrate, an active pattern on the substrate and including a first region, a second region spaced apart from the first region, and a third region between the first region and the second region, a first conductive pattern layer on the active pattern and including a first dummy portion overlapping the third region of the active pattern and a first conductive pattern which is spaced apart from the first dummy portion, and a plurality of second conductive patterns on the first conductive pattern layer, where the first dummy portion of the first conductive pattern layer is electrically insulated from the plurality of second conductive patterns and the active pattern.