Display Device Connection Line Conductive Layer Coupling
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Solution Overview
Problem
Display devices face challenges in maintaining image quality due to coupling between lines, which degrades the displayed image, especially with the increasing size of the display area and reduction of non-display areas.
Innovation Solution
The display device incorporates a substrate with a display area and a non-display area, featuring a first thin-film transistor, voltage lines, data lines, connection lines, and a conductive layer arranged in specific layers and orientations to minimize coupling, with additional transistors and electrodes for efficient signal transmission and image quality preservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area is increased and non-display area is reduced, then the display device achieves smaller size and higher screen-to-body ratio, but electrical signal interference and coupling between lines increases degrading image quality
Solution Approach 1:
A conductive layer is introduced as an intermediary element between the first voltage line and the data line. This conductive layer acts as a mediator to manage electrical coupling, allowing the display area to be maximized while controlling signal interference through its specific electrical properties and positioning.
Solution Approach 2:
The conductive layer is strategically positioned only in specific regions where voltage lines and data lines intersect or run adjacent to each other. This localized approach addresses electrical interference only where it occurs, rather than requiring blanket shielding across the entire display area, thus preserving screen-to-body ratio while managing interference.
2Area of stationary object
If connection lines are routed through the display area to connect data lines to pad area, then the non-display area can be reduced, but coupling between connection lines and voltage lines may occur degrading image quality
Solution Approach 1:
The conductive layer serves as an intermediary that manages the interaction between connection lines and voltage lines in the display area. By controlling the electrical coupling through this intermediate layer, the connection lines can be routed through the display area to minimize non-display area while preventing harmful coupling effects.
Solution Approach 2:
The conductive layer is arranged in a different layer than both the voltage lines and data lines, creating a three-dimensional arrangement. This vertical separation in another dimension (layer depth) allows horizontal routing of connection lines through the display area while maintaining electrical isolation through the layered structure.
Data Source
AI summary
A display device includes a substrate including a display area in which a display element is arranged and a non-display area having a pad area outside the display area, a first thin-film transistor arranged in the display area of the substrate and including a first semiconductor layer and a first gate electrode insulated from the first semiconductor layer, a first voltage line which extends in a first direction on the first gate electrode, a data line apart from the first voltage line and which extends in the first direction, connection lines which connects the data line to a pad in the pad area in the display area, and a conductive layer arranged in a layer between the first voltage line and the data line.