Configurable Image Sensor Pixel Array Energy Harvesting
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Solution Overview
Problem
Existing image sensor systems for remote and isolated areas face challenges in long-term operation due to the lack of access to electric grids and high costs of battery replacement, necessitating the development of energy harvesting solutions that are not bulky, expensive, or overly complex.
Innovation Solution
A configurable image sensor system with a two-dimensional array of photo-diode pixels, an energy harvesting output bus, and switching busses that allow pixels to be directed between energy harvesting and image sensing modes, utilizing a DC-DC converter and energy storage device, with mode selection switches and amplifiers to optimize energy use based on environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If energy harvesting components are added to image sensor systems, then energy autonomy is improved, but device complexity increases
Solution Approach 1:
The patent combines energy harvesting functionality with image sensing functionality within the same pixel array. Each pixel can operate in either image sensing mode or energy harvesting mode, merging two functions into a single integrated structure rather than adding separate components.
Solution Approach 2:
The pixel array serves dual purposes: it can capture images and harvest energy simultaneously or independently. The system provides multi-functionality by allowing pixels to be dynamically configured for different operations based on environmental conditions and power needs.
2Use of energy by moving object
If more pixels are allocated to energy harvesting mode, then energy generation is improved, but image resolution deteriorates
Solution Approach 1:
The system dynamically adjusts the proportion of pixels in energy harvesting mode versus image sensing mode based on environmental conditions and power requirements. This dynamic reconfiguration allows optimal balance between energy generation and image quality at any given time.
Solution Approach 2:
The patent changes the operational parameter of each pixel (sensing mode vs. harvesting mode) based on environmental light conditions and power needs. This parameter adjustment enables flexible trade-off between energy generation and image resolution.
3Adaptability or versatility
If switching mechanisms are added to redirect pixel output, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
The pixel array is segmented into multiple independently controllable units, each capable of being switched between sensing and harvesting modes. This segmentation allows flexible reconfiguration without requiring complex global switching mechanisms.
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
Enables long-term operation by efficiently switching between energy harvesting and image sensing modes, allowing for variable pixel configuration to adapt to energy availability and image resolution requirements, reducing the need for battery replacement and maintaining effective image acquisition.
Implementation Method 1
a plurality of photo-diode pixels arranged in a two-dimensional array
Data Source
AI summary
An image sensor is provided, the image sensor comprising a plurality of photo-diode pixels arranged in a two-dimensional array, an energy harvesting output bus connected to the plurality of photo-diode pixels, an image sensing output bus connected to the plurality of photo-diode pixels, and a plurality of switching buses connected to the plurality of photo-diode pixels to direct an output of a varying percentage of the plurality of photo-diode pixels to either the energy harvesting output bus or the image sensing output bus.