Display Substrate Routing for Sensing Area Integration
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Solution Overview
Problem
Existing display technologies face challenges in integrating sensing devices, such as cameras or face recognition devices, into full-screen displays without obstructing signal lines, which requires a light-shielding structure in the light-transmitting area.
Innovation Solution
A display substrate with a screen area that includes at least one sensing area and a display area surrounding it, featuring a light-transmitting area and a routing area with gate and data lines that are bent along the edge of the light-transmitting area, allowing for efficient signal routing without obstructing the sensing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-transmitting area is created for sensing devices, then sensing functionality is enabled, but signal lines cannot be routed directly through this area
Solution Approach 1:
The patent applies multi-layer routing by distributing signal lines across multiple metal layers (first metal layer, second metal layer, third metal layer). This dimensional expansion allows signal lines to bypass the light-transmitting area constraint while maintaining electrical connectivity, resolving the contradiction between sensing device integration and signal line routing.
Solution Approach 2:
The routing area is segmented into multiple paths across different layers. Some signal lines route through the first metal layer, others through the second and third metal layers, creating parallel pathways that avoid the light-transmitting area. This segmentation enables flexible signal transmission without obstructing the sensing device.
2Reliability
If signal lines are wound around the blind hole, then signal transmission is maintained, but the frame area increases
Solution Approach 1:
By utilizing multiple metal layers for signal routing, the patent reduces the need for large frame areas. Signal lines can be positioned closer to the light-transmitting area boundary in upper layers, minimizing the frame width while maintaining reliable signal transmission through the multi-layer pathway.
Solution Approach 2:
Different metal layers are assigned different routing functions based on local requirements. The first metal layer handles certain signal paths, while the second and third metal layers handle other paths, optimizing the local routing density and reducing the overall frame area needed.
3Ease of manufacture
If multiple signal lines are routed in the same metal layer, then routing is simple, but lines may overlap or interfere with each other
Solution Approach 1:
The patent distributes multiple signal lines across different metal layers (first, second, and third metal layers), eliminating overlaps and interference that would occur in a single-layer routing scheme. This multi-layer approach maintains manufacturing simplicity while ensuring reliable signal isolation through physical separation in the vertical dimension.
Data Source
AI summary
A display substrate has a screen area, the screen area includes at least one sensing area and a display area surrounding each sensing area, the sensing area includes a light-transmitting area and a routing area. The display substrate includes: a plurality of first gate lines, each of which includes a gate line main body part in the display area and a gate line connecting part; and a plurality of first data lines, each of which includes a data line main body part in the display area and a data line connecting part. For any one of the routing areas, the plurality of data line connecting parts are respectively in at least two metal layers insulated and spaced from each other, and/or, the plurality of gate line connecting parts are respectively arranged in at least two metal layers insulated and spaced from each other.