Optical Sensing Layout for Narrow-Bezel Display Panels
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Solution Overview
Problem
The increasing presence of peripheral elements in electronic devices reduces the screen-to-body ratio, necessitating a solution to optimize spatial configuration and minimize frame width.
Innovation Solution
The implementation of optical sensing elements and signal lines in different metal layers, overlapping with gate driving circuits and other components, reduces the space requirement in the peripheral region, thereby minimizing the frame width and enhancing the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peripheral elements such as ambient light sensing elements are added to improve display performance, then display performance is improved, but the space required in the peripheral region increases and the screen-to-body ratio is reduced
Solution Approach 1:
The patent applies multi-layer stacking to arrange components in three-dimensional space rather than confined to a single planar layer. Specifically, the ambient light sensing element and its signal lines are positioned in different metal layers (e.g., second metal layer for sensing element, fourth metal layer for signal lines), enabling vertical integration that reduces peripheral region space consumption while maintaining display performance improvements.
Solution Approach 2:
The patent implements nested arrangement where the signal line is positioned beneath the ambient light sensing element in the vertical dimension. This nesting configuration allows the signal line to pass through or alongside the sensing element structure without occupying additional planar space, thereby minimizing the frame width while preserving all necessary electrical connections.
2Adaptability or versatility
If the number of peripheral elements is increased to enhance functionality, then functionality is improved, but the frame width increases
Solution Approach 1:
The patent transitions from two-dimensional planar arrangement to three-dimensional multi-layer stacking. By placing the ambient light sensing element and its associated signal lines across different metal layers, the design accommodates additional functional elements without proportionally increasing the horizontal frame width, thus maintaining a compact device profile.
Solution Approach 2:
The patent designs the multi-layer structure to serve multiple functions simultaneously. The stacked arrangement of sensing elements and signal lines in different layers enables enhanced functionality (e.g., ambient light sensing, touch sensing, display driving) within a compact footprint, allowing the device to perform multiple functions without requiring proportionally larger frame dimensions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces the frame width and increases the screen-to-body ratio by optimizing the layout of ambient light sensing elements and signal lines across multiple metal layers, thereby improving display performance.
Implementation Method 1
an optical sensing element configured to sense a light and generate a signal
Data Source
AI summary
An electronic device includes a base, a data line disposed on the base, a scan line disposed on the base and crossing the data line, an optical sensing element configured to sense a light and generate a signal, a signal line electrically connected to the optical sensing element and configured to transmit the signal, and a touch line disposed on the base. In a top view direction of the electronic device, the scan line at least partially overlaps the touch line.