Lens Focusing Control via Target Speed and Position
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Solution Overview
Problem
Current automatic focus methods in photographing devices lack controllability and accuracy, especially in professional film and television shooting where precise focus is crucial, leading to the need for manual focus techniques and professional assistance.
Innovation Solution
A lens focusing control method and device that determines a target object based on user operation and controls the lens to automatically focus from a current position to the target object using a target focusing speed, combining the flexibility of manual focus with the accuracy of automatic focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic focus methods are used, then ease of operation is improved, but controllability and accuracy deteriorate
Solution Approach 1:
The patent introduces an intermediary control system that sits between manual focus operation and automatic focus execution. The user's manual focus ring operations are captured and processed by a control device that then drives the lens motor to execute the focusing movement. This intermediary layer allows the system to maintain the simplicity and intuitiveness of manual focus operation while achieving the precision and reliability of automatic focus control through algorithmic processing and motorized execution.
2Measurement precision
If manual focus techniques are used, then focus accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system employs self-service by automatically executing focus adjustments based on captured operational inputs. Once the user provides focus direction and speed information through manual ring operations, the control device autonomously calculates the required motor movements and drives the lens to the correct focus position without requiring further manual intervention. This self-service mechanism maintains high focus accuracy while significantly reducing the operational burden on the user.
3Productivity
If automatic focus is used, then productivity is improved, but controllability deteriorates
Solution Approach 1:
The patent implements dynamic control by allowing the focusing system to adapt its behavior based on real-time operational conditions. The control device continuously monitors manual focus ring operations and dynamically adjusts motor driving parameters including speed, acceleration, and positioning based on the user's instantaneous intentions. This dynamic approach enables the system to maintain high focusing speed for efficiency while preserving full controllability to adapt to different shooting scenarios and user preferences.
Data Source
AI summary
A lens focusing control method and device, and a photographing device are provided. The device includes at least one processor and at least one memory including computer program code, the at least one memory and the computer program code are configured, with the at least one processor, to cause the device to at least: obtain an operation and determine a target object to be focused based on the operation, and control, based on a current focus position of a lens and a target focusing speed, the lens to automatically focus from the current focus position to a target object.