Display Substrate Wire Layout for Under-Display Camera Transmittance
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Solution Overview
Problem
Existing display devices face challenges in achieving a high screen-to-body ratio while accommodating imaging modules like cameras, leading to reduced display area and visual obstruction.
Innovation Solution
A display substrate design with distinct display regions and optimized connection wire arrangements in transparent conductive layers, reducing occlusion and increasing light transmittance for under-display sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If connection wires are arranged in multiple transparent conductive layers to reduce occlusion of optical signals, then light transmittance is improved, but device complexity and manufacturing cost increase due to the number of masks required
Solution Approach 1:
The patent transitions from a planar arrangement of connection wires to a three-dimensional arrangement using multiple transparent conductive layers stacked vertically. This dimensional change allows connection wires to be distributed across different height levels (first, second, and third transparent conductive layers), reducing horizontal overlap and occlusion of optical signals while maintaining effective electrical connections to pixel electrodes.
Solution Approach 2:
The patent segments the connection wires into multiple groups distributed across different transparent conductive layers. Specifically, first connection wires are arranged in a first transparent conductive layer, second connection wires in a second transparent conductive layer, and third connection wires in a third transparent conductive layer. This segmentation reduces the occlusion of optical signals by distributing wire locations spatially across vertical layers.
2Measurement precision
If connection wires are arranged in multiple transparent conductive layers to reduce diffraction, then signal-to-noise ratio is improved, but manufacturing cost increases due to additional masks
Solution Approach 1:
The patent utilizes vertical stacking of transparent conductive layers to separate connection wires in the height dimension, reducing horizontal overlap and diffraction effects. This three-dimensional arrangement improves optical signal quality and signal-to-noise ratio for under-display cameras while managing manufacturing complexity through systematic layer integration.
Solution Approach 2:
The patent implements a nested structure where multiple transparent conductive layers containing connection wires are integrated within the display substrate architecture. The first, second, and third transparent conductive layers with their respective connection wires are nested vertically, allowing optical signals to pass through with reduced diffraction while maintaining a compact overall structure.
3Illumination intensity
If pixel driving circuits are arranged in a separate second display region to improve light transmittance, then light transmittance is improved, but area of display region for light emission is reduced
Solution Approach 1:
The patent segments the display substrate into distinct functional regions: a first display region optimized for light emission and camera functionality, and a second display region containing pixel driving circuits. This spatial segmentation allows the first display region to achieve high light transmittance while the second region houses the driving circuits, resolving the conflict between light transmission and circuit integration.
Solution Approach 2:
The patent transitions from a two-dimensional planar integration of circuits and display elements to a three-dimensional arrangement where pixel driving circuits are positioned in a separate second display region adjacent to the first display region. This spatial reorganization in the horizontal plane allows optimized light transmittance in the first display region while accommodating driving circuits elsewhere.
Data Source
AI summary
A display substrate and a display device are provided. The display substrate includes: a plurality of first light emitting devices arranged in a plurality of columns in a first direction to form a plurality of pixel column groups, including a first pixel column group, a second pixel column group and a third pixel column group that are arranged from an edge to a center of a first display region. Connection wires for transmitting driving signals to the first light emitting devices in the first pixel column group are located in a same transparent conductive layer as connection wires for transmitting driving signals to the first light emitting devices in the third pixel column group.