Display With Sloped Metal Layers for In-Display Light Detection
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Solution Overview
Problem
Existing display devices face challenges in integrating sensors into the display region without compromising display accuracy or resolution, particularly when aiming for ultra-narrow borders.
Innovation Solution
The integration of a light detecting element within the display device is achieved by using a substrate with specific metal parts and spaces, where the minimum distances and edge slopes of these metal parts are designed to facilitate light detection, creating pinholes that guide light to the detecting element while maintaining display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensors are embedded into the display region to achieve ultra-narrow borders, then the display-to-body ratio is improved, but the display accuracy or resolution may be compromised
Solution Approach 1:
The display region is segmented into multiple functional zones: display pixels, sensor regions, and metal layer structures with slopes. The metal layers are divided into multiple parts (first metal part, second metal part, third metal part, fourth metal part) creating distinct spaces for light detection while maintaining overall display integrity.
Solution Approach 2:
Different regions of the metal layers are given different properties - some areas have slopes less than 90 degrees to guide light, while other areas maintain flat surfaces for display functions. The minimum distances between metal parts and substrate are varied locally to create pinholes of specific sizes for light detection.
2Measurement precision
If metal layers with slopes are used to guide light to the detecting element, then the light detection accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The metal layer edges are designed with specific slope angles (less than 90 degrees) rather than vertical or curved surfaces. This angular geometry effectively guides light at specific angles to the detecting element while being more manufacturable than complex curved surfaces.
Solution Approach 2:
The metal layer structure is asymmetric with different minimum distances between metal parts and substrate, and different slope configurations on different edges. This asymmetry creates the necessary pinhole structures for light detection while maintaining manufacturing feasibility through standardized patterning processes.
3Adaptability or versatility
If the minimum distance between metal parts and substrate is varied to create pinholes, then the light detection function is improved, but the structural uniformity is reduced
Solution Approach 1:
The metal layer structure exhibits local quality variations with different minimum distances in different regions. The first metal part has a first minimum distance to the substrate, while the third metal part has a second minimum distance, creating pinholes of different sizes for optimized light detection while maintaining overall structural coherence.
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 design enhances the accuracy and resolution of the light detecting element, allows for improved display-to-body ratio, and reduces the border width of the display device.
Implementation Method 1
a light detecting element for detecting a light passing through the first space and the second space
Data Source
AI summary
An electronic device includes: a substrate; a first metal part, a second metal part, a third metal part and a fourth metal part disposed on the substrate, wherein a first space is between the first metal part and the second metal part, a second space is between the third metal part and the fourth metal part; and a light detecting element for detecting a light passing through the first space and the second space; wherein a minimum distance between the first metal part and the substrate is different from the third metal part and the substrate, and a minimum distance between the second metal part and the substrate is different from the fourth metal part and the substrate, wherein a first slope of a first edge of the first metal part and a second slope of a second edge of the second metal part are less than 90°.