Camera Module Linkage Apparatus for Continuous Zooming
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Solution Overview
Problem
Common camera modules struggle with implementing continuous zooming due to low location control precision of carriers, resulting in a poor imaging effect.
Innovation Solution
A linkage apparatus is introduced, featuring a base and two carriers that are slidably connected, with positioning and sensing elements to enhance location control precision. This apparatus allows for synchronous movement of the carriers, improving the precision of zooming and focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a common camera module uses a single carrier with fixed-power zooming, then the structure is simple, but the location control precision is low and continuous zooming cannot be implemented
Solution Approach 1:
The single carrier is divided into two independent carriers: a first carrier for zooming operation and a second carrier for focusing operation. Each carrier has its own positioning and sensing elements, allowing independent control and high-precision location detection for each function.
Solution Approach 2:
Positioning elements and sensing elements are installed on both carriers to detect their respective locations in real-time. The control unit receives feedback signals from these sensing elements and adjusts the carrier positions accordingly, forming a closed-loop control system that achieves high-precision location control.
2Measurement precision
If the first carrier moves to a new location for zooming, then the zooming function is achieved, but the second carrier cannot maintain accurate focusing position due to low control precision
Solution Approach 1:
The sensing elements on both carriers provide real-time position feedback to the control unit. When the first carrier moves for zooming, the control unit receives updated position information and adjusts the second carrier's position accordingly to maintain accurate focusing, ensuring both operations occur simultaneously with high precision.
Solution Approach 2:
The system pre-establishes the linkage relationship between zooming and focusing positions. When the first carrier is commanded to move to a specific zoom position, the control unit has already determined the corresponding focusing position for the second carrier, allowing both carriers to move to their respective target positions simultaneously without sequential adjustment.
3Measurement precision
If existing sensing and positioning elements are used for long-distance carrier movement, then the structure is simple, but manufacturing and process variations cause high-precision control to fail
Solution Approach 1:
The long-distance carrier movement is divided into multiple short-distance segments. Each segment uses its own positioning and sensing elements, which are optimized for short-range high-precision control. This segmentation allows the system to achieve high overall precision by composing multiple precise short steps rather than relying on a single long-distance positioning system.
Solution Approach 2:
The positioning system uses a nested structure where the first carrier has positioning elements relative to the base, and the second carrier has positioning elements relative to the first carrier. This creates a hierarchical positioning system where each level operates independently with high precision, and the combined system achieves even higher overall precision through the nested relationship.
Data Source
AI summary
This application discloses a linkage apparatus, a camera module, and an electronic device. The linkage apparatus is used in the camera module with continuous zooming, and includes a base, and a first carrier and a second carrier that are slidably connected to the base. A first positioning element is disposed on the base, a first sensing element and a second positioning element are disposed on the first carrier, and a second sensing element is disposed on the second carrier. The first sensing element is disposed opposite to the first positioning element, to detect a location of the first carrier relative to the base. The second sensing element is disposed opposite to the second positioning element, to detect a location of the second carrier relative to the first carrier. A movement relationship between the first carrier and the second carrier is set as an associated movement.