Image Sensor Attenuation Layer Modulating Light for Dynamic Range
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Solution Overview
Problem
Conventional image sensors struggle to capture scenes with wide ranges of brightness due to limited dynamic range, leading to saturation in bright areas and loss of detail in dark areas.
Innovation Solution
An image sensor is coupled with an attenuation layer featuring adjustable transparency elements, such as liquid crystals or smart glass, to modulate the light incident on the sensing layer, allowing for controlled light attenuation and increased dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the image sensor captures scenes with wide ranges of brightness, then the dynamic range is improved, but the sensing elements saturate in bright areas and cannot record actual light radiance
Solution Approach 1:
The patent segments the optical path into multiple channels with different attenuation characteristics. Some sensing elements receive light directly while others receive attenuated light, allowing simultaneous accurate measurement across different brightness levels without saturation
Solution Approach 2:
The patent changes the attenuation parameter by introducing an attenuation layer with adjustable transparency. This layer can be dynamically adjusted to modify the amount of light reaching the sensing elements, preventing saturation in bright areas while maintaining sensitivity in dark areas
2Measurement precision
If the image sensor is exposed to obtain good signal in dark areas, then the signal quality in dark areas is improved, but the sensing elements saturate in bright areas
Solution Approach 1:
The patent divides the sensing elements into groups that receive different levels of light attenuation. This segmentation allows each group to operate in its optimal range, with some elements capturing dark area details while others capture bright area information without saturation
Solution Approach 2:
The attenuation layer acts as an intermediary between the light source and the sensing elements. It mediates the light intensity to prevent direct saturation of sensing elements while preserving the ability to capture dark area signals with good quality
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
The solution enables the capture of high-dynamic range images by adjusting light intensities, preventing saturation and preserving detail in both bright and dark areas, thereby improving image quality.
Implementation Method 1
an attenuation layer coupled to the sensing layer, the attenuation layer configured with a plurality of attenuation elements to modulate light incident on the sensing layer
Implementation Method 2
the attenuation layer configured with a plurality of attenuation elements to modulate light incident on the sensing layer
Data Source
AI summary
An image sensor, including: a sensing layer having a plurality of sensing elements, each sensing element configured to record impinging photons; and an attenuation layer coupled to the sensing layer, the attenuation layer configured with a plurality of attenuation elements to modulate light incident on the sensing layer. Key words include sensing layer and attenuation layer.