Dual-Pixel Image Sensor Layout for Multi-Mode Smartphone Shooting
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Solution Overview
Problem
Existing image sensors in smartphones cannot effectively support multiple shooting modes without increasing costs, leading to reduced photosensitivity, dynamic range, and image quality issues, especially in dark environments, due to the need for multiple camera modules and software-based solutions that result in poor image definition and false colors.
Innovation Solution
An image sensor with a pixel array comprising first pixel units that acquire photo signals of at least two colors and second pixel units that acquire signals of a single color, where the working states of these units are controlled by separate control circuits to adapt to various shooting modes, reducing the need for multiple camera modules by activating only the necessary pixel units based on the shooting mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple camera modules are equipped to support different shooting modes, then shooting capabilities are improved, but device cost increases
Solution Approach 1:
The image sensor is designed to perform multiple shooting functions (wide-angle, portrait zoom, ultra-wide-angle, ultra-long zoom) through a single sensor by activating different pixel unit types based on the shooting mode, eliminating the need for multiple separate camera modules and reducing device cost
2Quantity of substance
If a single image sensor is used for multiple shooting modes, then device cost is reduced, but image quality deteriorates due to software processing
Solution Approach 1:
The image sensor is segmented into different types of pixel units (first pixel units with stacked photosensitive elements for multiple colors, second pixel units for single color) that can be selectively activated based on shooting mode, allowing optical-level image quality for each mode without relying on software processing
3Loss of information
If pixel units are stacked to acquire multiple colors, then color information is improved, but photosensitivity and dynamic range are reduced
Solution Approach 1:
The image sensor dynamically activates different types of pixel units based on the shooting mode requirements - using first pixel units with stacked photosensitive elements when color information is needed, and second pixel units when photosensitivity and dynamic range are prioritized, thereby optimizing performance for each specific shooting scenario
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 better digital zoom effects and higher-quality images across multiple shooting modes while reducing the number of camera modules, thereby lowering costs and improving image sensitivity and dynamic range.
Implementation Method 1
the first pixel unit includes photosensitive elements stacked and configured to acquire photo signals of at least two colors
Implementation Method 2
the second pixel unit includes photosensitive elements configured to acquire photo signals of a single color
Data Source
AI summary
An image sensor includes a pixel array, and the pixel array includes a first number of first pixel units and a second number of second pixel units, where the first pixel unit includes photosensitive elements stacked and configured to acquire photo signals of at least two colors. The second pixel unit includes photosensitive elements configured to acquire photo signals of a single color.