Pixel Circuit Layout for Adjustable Phase Focus Density
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Solution Overview
Problem
Current image sensors lack the ability to adjust phase focus density, limiting their adaptability to different scenes and applications.
Innovation Solution
A pixel circuit design where transmission transistors of two pixels in each unit are connected to separate groups of transmission control lines, allowing for control of phase focus density without altering the pixel structure, enabling flexible phase focus adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmission transistors of all pixels are connected to the same transmission control line, then the circuit structure is simple, but the phase focus density cannot be adjusted
Solution Approach 1:
The transmission control lines are segmented into multiple independent groups (first group and second group), allowing different regions or pixels to be controlled independently. This segmentation enables selective activation of transmission transistors to achieve adjustable phase focus density while maintaining a relatively simple overall circuit structure.
Solution Approach 2:
The system dynamically switches between different transmission control line groups based on imaging requirements. By selectively activating the first group or second group of transmission control lines, the phase focus density can be adjusted in real-time without changing the physical pixel structure, providing adaptability to different scenes.
2Adaptability or versatility
If the pixel structure is modified to enable phase focus adjustment, then the phase focus density can be switched, but the optical performance may be compromised
Solution Approach 1:
The existing pixel structure is made multi-functional by adding control logic that can selectively activate different transmission control line groups. The same pixel hardware can serve both regular imaging and phase focus functions without structural modification, maintaining optical performance while gaining adaptability.
Solution Approach 2:
Instead of changing the physical structure of pixels, the system changes the operational parameters by selectively controlling which transmission control lines are active. This parameter-based control allows phase focus density adjustment while keeping the optical path and pixel structure unchanged, preserving optical performance.
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
Enables adjustable phase focus density, enhancing the image sensor's adaptability and maintaining good optical performance.
Implementation Method 1
each of the pixels comprises a photoelectric conversion element and a transmission transistor, and the photoelectric conversion element is used for generating an electric charge in response to incident light
Data Source
AI summary
This application belongs to the technical field of semiconductor devices, and relates to a pixel circuit, a control method, and an image sensor, including: at least two pixel units arranged in an array, wherein transmission transistors of two pixels of at least one pixel unit are connected to a corresponding first group of transmission control lines, and transmission transistors of other pixel unit are connected to a corresponding second group of transmission control lines. Therefore, the pixel circuit, the control method and the image sensor provided in the present application can control the density of phase focus of the image sensor by controlling the first group of transmission control lines and the second group of transmission control lines without changing the structure of the pixel, the structure is simple, and the optical performance is good.