Lens Moving Module With Hall IC for Compact, Low-Power OIS
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Solution Overview
Problem
Conventional camera modules face challenges in miniaturization, low power consumption, and enhancing the sensitivity of optical image stabilizers (OIS) for portable devices, such as smartphones, which require improved auto focusing and zoom functions.
Innovation Solution
A lens moving apparatus with a hall driver integrated circuit (IC) and a conductive arrangement structure, featuring a housing with magnets, coils, and position sensors, along with upper and lower springs, to achieve precise and efficient optical image stabilization while reducing size and current consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional voice coil motor (VCM) is used in a camera module, then the driving function is achieved, but the size is large and power consumption is high
Solution Approach 1:
The patent combines the Hall sensor and driver into a single integrated circuit (IC), eliminating the need for separate VCM components. This integration reduces the overall volume of the camera module and minimizes power consumption by optimizing the electrical connection and reducing component count.
Solution Approach 2:
The integrated Hall driver IC serves multiple functions: it acts as both the position sensor (Hall sensor) and the driver for the voice coil motor. This multi-functionality reduces the number of separate components needed, thereby reducing size and power consumption while maintaining full driving capability.
2Volume of moving object
If the camera module is miniaturized, then the size is reduced, but the sensitivity of the optical image stabilizer (OIS) deteriorates
Solution Approach 1:
By integrating the Hall sensor and driver into a single IC, the patent reduces the space required for OIS components. This allows the OIS system to maintain high sensitivity with a reduced overall module size, as the integrated design optimizes the spatial arrangement and electrical connections.
Solution Approach 2:
The patent uses a Hall effect-based integrated sensor to replace traditional mechanical position sensing mechanisms. This substitution enables precise magnetic field detection for OIS sensitivity while occupying minimal space, allowing camera module miniaturization without compromising stabilization performance.
3Adaptability or versatility
If separate Hall sensor and driver components are used, then the functionality is complete, but the device complexity and size increase
Solution Approach 1:
The patent integrates the Hall sensor and driver into a single IC, reducing device complexity by eliminating the need for separate mounting, wiring, and spatial arrangement of multiple components. The integrated design maintains complete driving functionality while simplifying the overall system architecture.
Solution Approach 2:
The Hall driver IC is designed to perform multiple functions within a single component: position sensing via Hall effect and driver functionality for the voice coil motor. This multi-functionality reduces device complexity by consolidating what would traditionally require separate components into one unified device.
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
The solution enables accurate auto focus feedback control and enhanced sensitivity of the optical image stabilizer, improving the performance of camera modules in portable devices by reducing size and power consumption while maintaining high precision.
Implementation Method 1
a first position sensor disposed on the first circuit board and electrically connected to the first pad, the second pad, the third pad, the fourth pad, the fifth pad, and the sixth pad
Data Source
AI summary
An embodiment comprises: a housing comprising side parts, a first corner part, a second corner part, a third corner part, and a fourth corner part, in which each of the first corner part, the second corner part, the third corner part and the fourth corner is disposed between two adjacent side parts; a bobbin disposed in the housing; a first coil disposed on an outer surface of the bobbin; first magnets disposed on the side parts of the housing; a first circuit board disposed on the first corner part and comprising a first pad, a second pad, a third pad, a fourth pad, a fifth pad and a sixth pad; a first location sensor disposed on the first circuit board and electrically connected to the first pad, the second pad, the third pad, the fourth pad, the fifth pad and the sixth pad; first, second, third and fourth upper springs disposed apart from each other on the housing; and first and second lower springs coupled to a lower portion of the housing, electrically connected with the first coil, and coupled to the fifth and sixth pads, wherein each of the first to fourth upper springs is coupled to a corresponding one of the first to fourth pads in the first corner part.