Dual Sensing Device With Overlapping Orthographic Projections
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Solution Overview
Problem
The integration of multiple sensors with different structures into a single device is complex, hindering the development of smart living environments that require simplified sensing solutions.
Innovation Solution
A dual sensing device is designed with a first substrate hosting multiple first sensing elements and a second substrate with overlapping orthographic projections of sensing elements, incorporating a light shielding layer, light angle control, and organic photodiodes to enhance sensing performance and simplify the integrated structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors with different structures are integrated into a single device, then multiple sensing functions are provided, but the integrated structure becomes complex
Solution Approach 1:
The patent combines multiple sensing elements (visible light sensing element and infrared sensing element) into a single integrated device structure, where both sensing elements are positioned on the same substrate with overlapping orthographic projections. This merging approach enables multiple sensing functions while maintaining a simplified unified structure rather than separate sensor assemblies.
Solution Approach 2:
The patent utilizes vertical layering and overlapping projections in the third dimension to integrate multiple sensing elements. By positioning the visible light sensing element and infrared sensing element at different depths with overlapping projections on the substrate, the device achieves multi-functionality without increasing planar complexity.
2Area of stationary object
If sensing elements are positioned to overlap in orthographic projection, then the opening region is increased, but light intensity for sensing may be reduced
Solution Approach 1:
The patent applies different optical properties to different regions of the device. The light shielding layer is strategically positioned to block light only where needed (behind the first sensing element), while other regions maintain light transmission. This localized light management allows increased opening region without compromising the light intensity required for sensing operations.
Solution Approach 2:
The device structure is segmented into distinct functional layers including the light shielding layer, first sensing element layer, and second sensing element layer. This segmentation allows each layer to perform its specific function independently, enabling the light shielding layer to protect against unwanted light while maintaining adequate light intensity for the sensing elements through precise positioning and selective transparency.
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 simplifies the integrated structure, increases the opening region, and improves sensing performance by allowing increased light intensity and reduced noise, enhancing the effectiveness of both visible and invisible light sensing elements.
Implementation Method 1
the second sensing element is an organic photodiode. the organic photodiode includes an electron transport layer, a hole transport layer, and a photosensitive layer located between the electron transport layer and the hole transport layer
Data Source
AI summary
A dual sensing device, including a first substrate, a first sensing element layer, and a second sensing element layer, is provided. The first sensing element layer is disposed on the first substrate and includes multiple first sensing elements. The second sensing element layer is disposed on the first sensing element layer and includes multiple second sensing elements, wherein an orthographic projection of the second sensing element on the first substrate overlaps with an orthographic projection of the first sensing element on the first substrate.