Display Apparatus Connection Line Routing for Static Electricity Management
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Solution Overview
Problem
In display apparatuses, the increased length of connection lines between pixel circuits and display elements leads to the introduction of electrical charges, causing pixel defects due to static electricity.
Innovation Solution
The display apparatus includes a substrate with an auxiliary circuit area and display area, featuring a connection line with sub-lines on different layers, and an insulating layer to reduce static electricity-induced pixel defects, with the sub-lines being electrically connected through a contact portion to minimize charge introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the connection line length is increased to connect pixel circuits and display elements spaced apart, then the display area can be expanded, but electrical charges are introduced through the connection line causing pixel defects
Solution Approach 1:
The connection line is configured to extend in a direction oblique to the first direction (row direction), utilizing a diagonal path through the substrate. This dimensional change in routing allows the connection to span greater display area while minimizing exposure to static electricity sources compared to conventional orthogonal routing
Solution Approach 2:
The connection line structure is segmented into multiple conductive layers with insulating layers in between, creating a multi-level pathway. This segmentation allows the signal to travel through different spatial planes, reducing the effective length in any single plane and minimizing charge accumulation risk
2Area of stationary object
If the connection line length is increased to connect pixel circuits and display elements spaced apart, then the display area can be expanded, but the connection line introduces more electrical charges
Solution Approach 1:
Insulating layers are introduced as intermediary structures between different conductive layers in the connection line. These intermediaries prevent direct charge accumulation and provide electrical isolation, reducing the harmful effects of electrical charges while maintaining the extended connection path needed for expanded display area
Solution Approach 2:
The connection line utilizes oblique routing at angles other than 0° or 90° relative to the row direction, creating a three-dimensional routing path. This dimensional approach reduces the projected length on any single plane, thereby minimizing charge introduction while achieving the required connection distance for expanded display areas
Data Source
AI summary
The display apparatus includes a substrate including an auxiliary circuit area and an auxiliary display area, an auxiliary pixel circuit on the auxiliary circuit area, an auxiliary display element on the auxiliary display area, and a connection line extending from the auxiliary circuit area to the auxiliary display area and configured to connect the auxiliary pixel circuit to the auxiliary display element. The connection line includes a first sub-line and a second sub-line which are on different layers, and the first sub-line is electrically connected to the second sub-line through a contact portion.