Movable Bayer Sensor Camera Module for Multi-Frame Resolution Gain
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Solution Overview
Problem
Existing camera modules face limitations in improving image resolution due to fixed pixel sizes, leading to reduced photosensitivity and potential interpolation errors in single-frame interpolation, and difficulty in controlling pixel displacement in multi-frame synthesis, resulting in poor image quality.
Innovation Solution
A camera module with a photosensitive chip that switches between multiple positions relative to the lens using a driving member, allowing formation of multiple images with the same content but different color filters, which are then synthesized to increase effective pixel count and improve resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the quantity of pixels is increased to improve imaging resolution, then the imaging resolution is improved, but the photosensitivity of the camera module is reduced
Solution Approach 1:
The patent introduces a temporal dimension by capturing multiple images at different time points (first image at time t1, second image at time t2). Instead of increasing spatial pixels, the system uses time-based multi-frame synthesis where the same physical pixel captures different color information at different moments, effectively increasing resolution through temporal sampling rather than spatial density.
Solution Approach 2:
The system employs periodic color filter array switching where the color filter array is moved to different positions (first position, second position) in a periodic manner. This allows the same pixel to sequentially capture different color channels (R, G, B) across multiple frames, transforming a static pixel into a multi-functional sensor that effectively increases the number of photosensitive elements without adding physical pixels.
2Measurement precision
If single-frame interpolation is used to improve resolution, then the resolution is improved, but interpolation errors occur in some scenarios
Solution Approach 1:
The patent creates multiple copies of the same scene captured at different time points and with different color filter positions. Instead of interpolating a single frame, the system captures multiple identical scenes (first image, second image) with slight temporal and spatial variations, then synthesizes them to produce a high-resolution result. This copying approach replaces error-prone interpolation with actual captured data from multiple frames.
3Measurement precision
If multi-frame synthesis is used to improve resolution, then the resolution may be improved, but pixel displacement control is difficult and image quality is poor
Solution Approach 1:
The system incorporates feedback mechanisms to track and compensate for pixel displacement between frames. By monitoring the relative movement between the first image and second image, the system can adjust the synthesis process to align corresponding pixels accurately. This feedback-based alignment ensures that multi-frame synthesis produces high-quality results even when slight displacements occur during capture.
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
Enhances image resolution by increasing real photosensitive pixels through filter channel diversity, resulting in improved image quality and user experience.
Implementation Method 1
a photosensitive chip... each of the pixel region includes four pixel sub-regions... light incident from the lens forms a first image in a first pixel sub-region... forms a second image in a second pixel sub-region
Data Source
AI summary
An electronic device and a camera apparatus are provided. The camera apparatus includes a lens, a driving member, and a photosensitive chip. The photosensitive chip is a Bayer array sensor. The photosensitive chip includes a plurality of pixel regions arranged in rows and columns, and each pixel region includes four pixel sub-regions. The photosensitive chip is connected to the driving member, and the driving member is configured to drive the lens to move between a first position and a second position relative to the lens. When the photosensitive chip is in the first position, light incident from the lens forms a first image in a first pixel sub-region of the photosensitive chip. When the photosensitive chip is in the second position, light incident from the lens forms a second image in a second pixel sub-region of the photosensitive chip.