Under-Display Camera With Angled Sensor Grids for Image Synthesis
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Solution Overview
Problem
The quality of images captured by an under-display camera is degraded due to light diffraction and scattering by the display panel pattern, leading to blurred images and reduced modulation transfer function (MTF) characteristics.
Innovation Solution
The electronic device employs a camera module with a first image sensor having monochrome pixels in a first grid pattern and a second image sensor with a color filter array in a second grid pattern, oriented at different angles to minimize the impact of point spread function (PSF) diffraction, thereby improving image resolution in high-frequency areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single image sensor is used under the display, then the device structure is simple, but image resolution is degraded due to PSF diffraction
Solution Approach 1:
The camera module is divided into multiple image sensors (first image sensor with monochrome pixels and second image sensor with color filter array) positioned at different angles. Each sensor captures images from its specific angle, and the images are subsequently synthesized to produce a final high-resolution image that overcomes the limitations of individual sensors affected by PSF diffraction.
Solution Approach 2:
The solution introduces angular dimensionality by positioning image sensors at different angles (first angle and second angle) relative to the display. This angular diversity allows the system to capture light paths that are less affected by PSF diffraction in specific directions, effectively adding a spatial dimension to the imaging process to mitigate diffraction effects.
2Measurement precision
If image sensors are positioned at the same angle as the display grid pattern, then alignment is simple, but diffraction effects are maximized
Solution Approach 1:
The image sensors are intentionally positioned at asymmetric angles (first angle and second angle) that differ from the display grid pattern orientation. This asymmetric positioning ensures that the sensors are not aligned with the diffraction patterns generated by the display, thereby reducing the impact of PSF diffraction on image quality.
3Measurement precision
If multiple image sensors at different angles are used, then image resolution is improved, but device complexity increases
Solution Approach 1:
Multiple images captured by different image sensors at different angles are synthesized and merged into a single final image. The synthesis process combines the complementary information from each sensor to produce a high-resolution image that leverages the angular diversity to overcome PSF diffraction limitations.
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 enhances image resolution by positioning sensors at angles less affected by PSF diffraction, effectively compensating for image quality degradation caused by the display panel patterns.
Implementation Method 1
the display panel pattern may diffract or scatter light
Implementation Method 2
the display panel pattern may diffract or scatter light
Implementation Method 3
configured to obtain an image of light having passed through the display
Data Source
AI summary
An electronic device according to an embodiment may include: a display and a camera module including at least one camera disposed under the display and configured to obtain an image of light having passed through the display wherein the camera module may include a first image sensor including monochrome pixels in a first grid pattern and a second image sensor including a color filter array including a plurality of color filters in a second grid pattern, and the second grid pattern may form a specified angle with the first grid pattern.