Multi-Directional Phase Detection for Camera Focusing Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing dual-core full-pixel focusing technology can only detect phase differences of pixel points in the horizontal direction, limiting focusing speed and accuracy.
Innovation Solution
The image sensor is designed with a photosensitive unit array that includes pairs of focusing photosensitive units arranged in different directions, allowing detection of phase differences in multiple directions, thereby improving focusing speed and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional single-direction photodiode arrangement is used, then device structure is simple, but focusing accuracy and speed are limited
Solution Approach 1:
Each pixel is segmented into multiple photodiodes arranged in different directions (first photodiodes in horizontal direction, second photodiodes in oblique direction). This segmentation allows the system to detect phase differences in multiple directions simultaneously, improving focusing accuracy without requiring a complete redesign of the pixel structure.
Solution Approach 2:
The patent introduces photodiodes arranged in oblique directions (adding a new spatial dimension/direction) beyond the traditional horizontal arrangement. This dimensional expansion enables detection of phase differences in both horizontal and oblique directions, enhancing focusing precision by capturing multi-directional optical path information.
2Measurement precision
If dual-core full-pixel focusing technology is used, then focusing speed improves, but focusing accuracy still needs improvement
Solution Approach 1:
The patent pre-arranges multiple photodiodes in specific directional configurations within each pixel before the focusing operation begins. This preliminary structural preparation enables the system to immediately detect phase differences in multiple directions when focusing is initiated, eliminating the need for sequential measurements and thus improving both speed and accuracy simultaneously.
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 configuration enables accurate calculation of the direction and distance for camera lens movement, enhancing focusing precision and speed by detecting phase differences in multiple directions.
Implementation Method 1
the photosensitive unit array includes M pairs of first focusing photosensitive units with center lines parallel to each other and N pairs of second focusing photosensitive units with center lines parallel to each other
Data Source
AI summary
The present disclosure provides a photography processing method for a camera module, a terminal, and a computer-readable storage medium. The method includes: controlling the photosensitive unit array to enter a focusing mode; reading a first set of output values of the M pairs of first focusing photosensitive units; reading a second set of output values of the N pairs of second focusing photosensitive units; performing focusing control according to the first set of output values and the second set of output values.