Camera Behind Display Digital Filter Distortion Correction
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Solution Overview
Problem
In electronic devices with front-facing cameras positioned behind displays, the camera obstructs the display, reducing its potential size and causing image distortion due to the display's partially transmissive nature, which affects image capture quality.
Innovation Solution
The implementation of a camera system with a processor that applies digital filters to captured images, utilizing restoration optics and apodized apertures to minimize distortion, allowing the camera to be positioned behind a partially transmissive display while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the camera is positioned behind the display, then the device achieves a more compact design with improved aesthetics, but the display size is reduced and image distortion occurs
Solution Approach 1:
The camera system is nested within the display structure by positioning the camera behind the partially transmissive display. The display acts as both a visual output interface and a protective cover for the camera, allowing the camera to be integrated into the device's front profile without requiring additional external space.
Solution Approach 2:
A partially transmissive display serves as an intermediary element between the external environment and the camera. This display allows light to pass through to the camera while maintaining its function as a visual display, effectively mediating between the conflicting requirements of camera protection and light transmission.
2Device complexity
If the camera is positioned behind the display, then the device achieves a more compact design, but image distortion occurs due to the partially transmissive nature of the display
Solution Approach 1:
The optical parameters of the display are specifically optimized to balance transmissivity and distortion. By adjusting the display's material properties, layer structure, and optical characteristics, the system achieves sufficient light transmission to the camera while minimizing image degradation. This involves changing parameters such as the display's transmissive ratio, refractive index, and structural configuration.
Solution Approach 2:
Optical correction elements are introduced to compensate for the distortion caused by the partially transmissive display. These may include optical compensators, wavefront correctors, or software-based image processing algorithms that replace or supplement traditional mechanical optical paths, allowing the camera to capture accurate images despite the display's interference.
3Device complexity
If the camera is positioned behind the display, then the device achieves a more compact design, but camera functionality is compromised
Solution Approach 1:
The partially transmissive display acts as an intermediary that allows the camera to function behind it. By carefully designing the display's optical properties, it enables sufficient light transmission and image quality while maintaining the camera's protective integration within the device structure.
Solution Approach 2:
The optical parameters of both the display and camera system are optimized to ensure functional reliability. This includes adjusting the display's transmissive characteristics, the camera's aperture settings, and the overall optical path configuration to maintain adequate light transmission and image capture capability despite the camera's position behind the display.
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 solution enables efficient image capture by reducing distortion caused by the display, allowing for a more compact device design and improved image fidelity without compromising on display size or camera functionality.
Implementation Method 1
a display having a front surface and a back surface. The display includes a plurality of pixel regions that emit light from the front surface to display a displayed image and a plurality of apertures that transmit light from the front surface to the back surface
Implementation Method 2
The processor is configured to receive the captured image and apply a first digital filter to a first portion of the captured image and a second digital filter, different than the first digital filter, to a second portion of the captured image to reduce image distortion caused by the display
Data Source
AI summary
In one implementation, an apparatus includes a display having a front surface and a back surface. The display includes a plurality of pixel regions that emit light from the front surface to display a displayed image and a plurality of apertures that transmit light from the front surface to the back surface. The apparatus includes a camera disposed on a side of the back surface of the display. The camera is configured to capture a captured image. The apparatus includes a processor coupled to the display and the camera. The processor is configured to receive the captured image and apply a first digital filter to a first portion of the captured image and a second digital filter, different than the first digital filter, to a second portion of the captured image to reduce image distortion caused by the display.