Display Device Narrow Frame via Multi-Layer Wiring Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display devices with touch detection functions, the dense arrangement of signal lines and detection lines in the non-display area leads to a wide frame area, degrading the display performance and making it challenging to achieve a narrow frame design.
Innovation Solution
The implementation of a display device with signal lines and detection lines distributed across multiple wiring layers via insulating layers, where the second portion of the signal lines is formed by the third wiring layer, reducing parasitic capacitance and allowing for a more efficient layout in the frame area, thereby minimizing the frame size and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines and detection lines are densely arranged in the non-display area to achieve a narrow frame, then the frame area is reduced, but parasitic capacitance increases and drive operation becomes difficult
Solution Approach 1:
The patent applies multi-layer wiring structure where signal lines and detection lines are distributed across different wiring layers (first wiring layer for signal lines, second wiring layer for detection lines). This dimensional separation reduces parasitic capacitance between lines while maintaining a compact layout, enabling narrow frame design without compromising drive operation reliability.
2Area of stationary object
If signal lines and detection lines are densely arranged in the non-display area, then the frame area is reduced, but parasitic capacitance between lines increases
Solution Approach 1:
By distributing signal lines and detection lines across multiple wiring layers, the patent reduces parasitic capacitance through spatial separation in the vertical dimension while maintaining compact horizontal arrangement, enabling narrow frame design.
Solution Approach 2:
The patent introduces insulating layers between different wiring layers to electrically isolate signal lines and detection lines. This intermediary structure prevents direct electrical coupling and reduces parasitic capacitance, enabling dense packing without harmful electrical interference.
3Reliability
If multiple wiring layers are used to reduce parasitic capacitance, then drive operation is improved, but device complexity increases
Solution Approach 1:
The patent organizes the complex wiring structure into systematic layers: first wiring layer for signal lines, second wiring layer for detection lines, with insulating layers in between. This layered organization simplifies the manufacturing process and design rules while achieving the goal of reduced parasitic capacitance and improved drive operation.
Data Source
AI summary
According to one embodiment, in the frame region, a second portion of each signal line is provided between a display region and a switch circuit, and is drawn from the switch circuit toward the display region, a first portion of the signal line is formed by a second wiring layer, provided between the second portion and the display region, and connected to the second portion, the second portion of the signal line and each of a plurality of detection lines are formed by a third wiring layer, and the second portions of the plurality of signal lines and the plurality of detection lines are provided approximately parallel to each other.