Common Power Supply Wiring in Display Peripheral Area
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face challenges in reducing the peripheral non-display area while preventing electrical short circuits between wirings, which affects the overall efficiency and image quality.
Innovation Solution
The display apparatus incorporates a substrate with a display area and a peripheral area, featuring organic insulating layers, a thin film transistor, and a common power supply wiring made of the same material layer, along with an auxiliary power supply wiring and encapsulation layers to minimize the peripheral area and prevent electrical short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power supply wirings are used for each pixel circuit, then electrical short circuit prevention is improved, but peripheral area increases
Solution Approach 1:
The patent merges the power supply wiring for multiple pixel circuits into a single common power supply wiring that extends across the peripheral area. This common wiring supplies power to multiple pixel circuits through shared conductive paths, reducing the total wiring area while maintaining electrical isolation through insulating layers and spacing structures.
Solution Approach 2:
The patent transitions from planar wiring arrangements to three-dimensional wiring structures by stacking multiple conductive layers vertically. Power supply wirings are positioned in different vertical layers (e.g., first conductive layer, second conductive layer) separated by insulating layers, enabling compact routing that reduces peripheral area while preventing electrical shorts through vertical separation.
2Area of stationary object
If peripheral area is reduced, then display area ratio is improved, but electrical short circuit risk increases
Solution Approach 1:
The patent uses vertical stacking of conductive layers separated by insulating layers to achieve compact wiring arrangements. By routing power supply signals through multiple vertical layers rather than spreading them horizontally, the peripheral area is reduced while electrical isolation is maintained through the insulating barriers between layers.
Solution Approach 2:
The patent introduces insulating layers as intermediary structures between adjacent conductive wirings. These insulating layers act as electrical barriers that prevent short circuits between power supply wirings and signal wirings, enabling closer wiring spacing that reduces peripheral area while maintaining electrical reliability.
3Area of stationary object
If common power supply wiring is used, then peripheral area is reduced, but voltage drop increases
Solution Approach 1:
The patent segments the common power supply wiring into multiple separate conductive paths distributed across different vertical layers and horizontal positions. Each pixel circuit group is served by dedicated segments of the common power supply network, reducing current density in any single wiring segment and minimizing voltage drops through distributed power delivery.
Solution Approach 2:
The patent distributes power supply wirings across multiple vertical layers to create parallel current paths. By routing power signals through different vertical levels (first conductive layer, second conductive layer, third conductive layer), the patent reduces the electrical resistance and inductance of each individual wiring segment, thereby reducing voltage drops while maintaining a compact peripheral area.
Data Source
AI summary
A display apparatus includes: a substrate including a display area and a peripheral area adjacent to the display area; a first and a second organic insulating layer each on the substrate; in the display area: a thin film transistor on the substrate; a driving voltage line connected to the thin film transistor and between the first and second organic insulating layers; and a display device connected to the thin film transistor, the first organic insulating layer and the second organic insulating layer being between the display device and the thin film transistor; and in the peripheral area, a common power supply wiring on the substrate and through which a common voltage is supplied to the display device in the display area. The common power supply wiring in the peripheral area and the driving voltage line in the display area are respectively portions of a same first material layer on the substrate.