Under-Display Camera Row-Wise HDR for Diffraction Noise
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Solution Overview
Problem
The use of under-display cameras in electronic devices leads to image quality deterioration due to light diffraction and scattering by the display panel patterns, resulting in reduced resolution and noise amplification in the short-wavelength area, particularly affecting the dynamic range.
Innovation Solution
A method is implemented to compensate for image deterioration by controlling the exposure conditions of the image sensor on a line-by-line basis using a staggered high dynamic range (HDR), with a first and second row of image sensors having different exposure settings based on pixel input values, and generating images from the combined data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an under display camera (UDC) is used to implement a full screen, then the screen area is increased, but image quality deteriorates due to light diffraction and scattering by the display panel pattern
Solution Approach 1:
The image sensor is divided into multiple rows, with different exposure conditions applied to different rows. This segmentation allows the system to capture multiple exposures of the same scene simultaneously, enabling HDR image processing to compensate for the optical degradation caused by the display panel pattern.
Solution Approach 2:
The patent changes the exposure parameter by applying different exposure conditions to different rows of the image sensor. By varying the exposure time or intensity across rows, the system captures multiple exposure levels that can be processed to recover image quality degraded by the display panel's optical interference.
2Area of stationary object
If an under display camera (UDC) is used, then a full screen design is achieved, but resolution decreases due to attenuation of frequency band components
Solution Approach 1:
The image sensor is divided into multiple rows, with different exposure conditions applied to different rows. This segmentation allows the system to capture multiple exposures of the same scene simultaneously, enabling HDR image processing to compensate for the optical degradation caused by the display panel pattern.
Solution Approach 2:
The patent changes the exposure parameter by applying different exposure conditions to different rows of the image sensor. By varying the exposure time or intensity across rows, the system captures multiple exposure levels that can be processed to recover image quality degraded by the display panel's optical interference.
3Area of stationary object
If an under display camera (UDC) is used, then a full screen design is achieved, but noise is amplified in the short-wavelength area due to low transmittance
Solution Approach 1:
The image sensor is divided into multiple rows, with different exposure conditions applied to different rows. This segmentation allows the system to capture multiple exposures of the same scene simultaneously, enabling HDR image processing to compensate for the optical degradation caused by the display panel pattern.
Solution Approach 2:
The patent changes the exposure parameter by applying different exposure conditions to different rows of the image sensor. By varying the exposure time or intensity across rows, the system captures multiple exposure levels that can be processed to recover image quality degraded by the display panel's optical interference.
4Area of stationary object
If an under display camera (UDC) is used, then a full screen design is achieved, but dynamic range is reduced in the short-wavelength area
Solution Approach 1:
The image sensor is divided into multiple rows, with different exposure conditions applied to different rows. This segmentation allows the system to capture multiple exposures of the same scene simultaneously, enabling HDR image processing to compensate for the optical degradation caused by the display panel pattern.
Solution Approach 2:
The patent changes the exposure parameter by applying different exposure conditions to different rows of the image sensor. By varying the exposure time or intensity across rows, the system captures multiple exposure levels that can be processed to recover image quality degraded by the display panel's optical interference.
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 approach reduces noise in the image by compensating for the short-wavelength area with low transmittance, enhancing image quality in under-display camera systems.
Implementation Method 1
light may be diffracted or scattered by the pattern of the display panel
Implementation Method 2
light may be diffracted or scattered by the pattern of the display panel
Implementation Method 3
obtain first image data using the first row according to a first exposure condition set based on a pixel input value
Data Source
AI summary
According to various embodiments, an electronic device may include a display, a first camera module disposed under the display and including a first image sensor, the first image sensor comprising a first row and a second row adjacent to the first row and a processor. The processor is configured to obtain first image data using the first row according to a first exposure condition set based on a pixel input value of a first color disposed in the first row, to obtain second image data using the second row according to a second exposure condition set based on an pixel input value of a second color disposed in the second row and to generate a first image based on the first image data and the second image data.