Camera Lens Focusing Using Stored Position Labels

Solution Overview

Problem

Existing camera devices suffer from low focusing speed and backlash issues during the focusing process, particularly in automatic focusing systems, leading to inefficient and potentially damaging operations.

Innovation Solution

A focusing method that utilizes a first database to store lens positions corresponding to specific photographing information labels, allowing direct retrieval and adjustment of the lens to the optimal position, thereby eliminating the need for repetitive adjustments and reducing backlash.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If automatic focusing system constantly adjusts lens position to find optimal focusing position, then focusing accuracy is improved, but focusing speed deteriorates and backlash phenomenon occurs

Engineering Contradiction:

Improvefocusing accuracyVSAvoidfocusing speed

Core Design Contradiction:

Measurement precisionVSSpeed

Solution Approach 1:

The system pre-stores the correspondence between photographing information labels (such as scene types, distances, or object characteristics) and optimal lens positions in a database. When photographing, the system directly retrieves the pre-stored lens position based on the current photographing information label, eliminating the need for repeated adjustment searches. This preliminary preparation of data enables rapid focusing while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system creates a database that copies and stores the optimal lens position information for different photographing scenarios. Instead of physically searching for the optimal position each time, the system uses this copied information to directly set the lens position, significantly improving focusing speed while avoiding backlash from repeated mechanical adjustments.

Inventive Principle:

Principle #26Copying

2Measurement precision

If automatic focusing system repeatedly adjusts lens position for frequently photographed areas, then focusing accuracy is maintained, but device complexity and operation time increase

Engineering Contradiction:

Improvefocusing accuracyVSAvoidoperation time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system pre-stores the correspondence between photographing information labels (such as scene types, distances, or object characteristics) and optimal lens positions in a database. When photographing, the system directly retrieves the pre-stored lens position based on the current photographing information label, eliminating the need for repeated adjustment searches. This preliminary preparation of data enables rapid focusing while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system discards the time-consuming repeated adjustment process for frequently photographed areas by retrieving pre-stored lens position information from the database. This allows the system to recover and reuse optimal focusing positions efficiently, reducing operation time while maintaining focusing accuracy.

Inventive Principle:

Principle #34Discarding and recovering

3Adaptability or versatility

If lens position is frequently adjusted to adapt to varying distances, then adaptability is improved, but backlash phenomenon and potential motor damage occur

Engineering Contradiction:

Improveadaptability to distance variationVSAvoidmotor reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system pre-stores the correspondence between photographing information labels (such as scene types, distances, or object characteristics) and optimal lens positions in a database. When photographing, the system directly retrieves the pre-stored lens position based on the current photographing information label, eliminating the need for repeated adjustment searches. This preliminary preparation of data enables rapid focusing while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses photographing information labels as feedback to directly determine the appropriate lens position from pre-stored data, avoiding random or repeated adjustments. This feedback mechanism ensures the lens is positioned correctly based on the current photographing conditions without causing backlash or motor damage from unnecessary movements.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250350833A1Focusing method for camera device, camera device, and computer-readable storage medium

Publication Date: 2025.11.13 SHENZHEN BAICHUAN SECURITY TECH CO LTD

AI summary

This application relates to a focusing method for a camera device, and a non-transitory computer-readable storage medium. The focusing method includes: acquiring a photographing information label from photographing information of the camera device; determining whether there is a lens position corresponding to the photographing information label in a first database; if there is the lens position corresponding to the photographing information label in the first database; acquiring the lens position corresponding to the photographing information label from the first database according to the photographing information label; generating a focusing control instruction according to the lens position; and controlling a photographing lens of the camera device to be provided at the lens position corresponding to the photographing information label according to the focusing control instruction. The rapid focusing of the camera device is achieved by implementing the focusing method.