Electronic Device Optical Sensing for Narrower Display Frames
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Solution Overview
Problem
The increasing presence of peripheral elements in electronic devices reduces the screen-to-body ratio, necessitating a redesign to optimize spatial configuration and minimize frame width.
Innovation Solution
The integration of ambient light sensing elements and signal lines with gate driving circuits in different metal layers, overlapping each other partially, along with the use of planarization layers to reduce parasitic capacitance and space requirements in the peripheral region.
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 screen-to-body ratio is reduced
Solution Approach 1:
The signal line is configured to overlap with the data line in the planar view, transitioning from a traditional side-by-side arrangement to a vertical stacking arrangement in different metal layers. This dimensional change allows the sensing elements to be integrated without increasing the horizontal footprint, thereby maintaining the screen-to-body ratio while adding functional elements.
Solution Approach 2:
The ambient light sensing element is integrated within the existing display structure by nesting it in the peripheral region and routing its signal line through the same metal layers as the data line, effectively embedding the sensing function within the display's existing spatial framework rather than adding external components.
2Adaptability or versatility
If peripheral elements are increased to meet user requirements, then functionality is improved, but the frame width increases
Solution Approach 1:
The signal line for the ambient light sensing element is routed to overlap with the data line in different metal layers, utilizing the vertical dimension (z-axis) rather than expanding horizontally. This reduces the frame width while maintaining the sensing function.
3Reliability
If signal lines are routed separately from data lines to ensure electrical isolation, then electrical interference is reduced, but the peripheral space requirement increases
Solution Approach 1:
The signal line is nested within the same metal layer structure as the data line, with the signal line overlapping the data line in the planar view. This nested configuration allows both lines to share the same spatial pathway while maintaining electrical isolation through the insulating layer, thereby reducing peripheral space requirements.
Solution Approach 2:
By routing the signal line and data line in different metal layers (vertical stacking) rather than adjacent horizontal positions, the design achieves electrical isolation through layer separation while minimizing the horizontal space occupied by these conductive elements.
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 enhances the screen-to-body ratio by minimizing the frame width and improving display performance through efficient use of space.
Implementation Method 1
an optical sensing element configured to sense a light and generate a signal
Data Source
AI summary
An electronic device having a light emitting region includes a base, a data line disposed on the base, a driving element disposed on the base, a light emitting element disposed on the base and corresponding to the light emitting region, an optical sensing element configured to sense a light and generate a signal, and a signal line electrically connected to the optical sensing element and configured to transmit the signal. At least a portion of the data line is corresponding to the light emitting region. The signal line is overlapped with the data line.