Camera Driver Voltage Control for Lens Motion Power Reduction
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Solution Overview
Problem
Existing methods to reduce power consumption in camera modules of terminal devices only address non-active camera modules, failing to improve the power consumption of the camera module currently in use during a shooting process.
Innovation Solution
Dynamically adjusting the drive voltage of the driver chip in the camera based on the position of the lens or aperture, using different voltage levels to match the required pushing force and minimize unnecessary high voltage states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver chip always operates at high voltage to ensure lens movement capability, then the lens can be moved to any position reliably, but the power consumption of the camera module increases significantly
Solution Approach 1:
The patent applies dynamics by making the drive voltage adjustable rather than fixed. The driver chip dynamically changes the drive voltage level based on the actual lens position requirements. When the lens needs to move long distances, high voltage is applied; when short distances are needed, low voltage is applied. This resolves the contradiction by making the voltage adaptive to actual needs rather than always maintaining high voltage for reliability.
Solution Approach 2:
The patent changes the voltage parameter based on lens position. The driver chip determines the current lens position and selects appropriate voltage levels (first drive voltage or second drive voltage) accordingly. This parameter change approach allows the system to maintain reliability when needed while reducing power consumption during normal operation, directly resolving the technical contradiction.
2Use of energy by moving object
If the drive voltage is reduced to save power, then the power consumption decreases, but the lens may fail to move to the required position
Solution Approach 1:
The patent implements feedback by continuously monitoring the lens position and adjusting the drive voltage accordingly. The driver chip determines the current lens position, compares it with the target position, and selects the appropriate voltage level to ensure the lens can reach the required position while minimizing power consumption. This feedback mechanism resolves the contradiction by ensuring positioning capability is maintained when needed.
Solution Approach 2:
The system dynamically adjusts the drive voltage based on actual positioning needs rather than using a fixed voltage level. When the lens is near the target position, lower voltage is sufficient; when far from target or requiring rapid movement, higher voltage is applied. This dynamic adjustment ensures ease of operation while reducing unnecessary power consumption.
3Adaptability or versatility
If multiple camera modules are used with different functions, then the shooting capabilities are enhanced, but the overall power consumption increases due to multiple active modules
Solution Approach 1:
The patent applies dynamics by enabling independent voltage control for each camera module's driver chip. Each module can operate at appropriate voltage levels based on its current usage state and functional requirements. This allows the system to maintain versatile shooting capabilities across multiple modules while optimizing power consumption by avoiding uniform high-voltage operation across all modules.
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
Reduces power consumption of the camera module during shooting processes by optimizing the drive voltage according to the lens or aperture position, thereby prolonging the device's standby time.
Implementation Method 1
the electronic device provides a first drive voltage for the driver chip, to drive the motor to move the lens to a first position; and the electronic device provides a second drive voltage for the driver chip, to drive the motor to move the lens to a second position
Data Source
AI summary
This application discloses a voltage adjustment method and a related apparatus. The method is used to adjust a voltage of a driver chip in a camera module. For a driver chip that controls movement of a lens, a drive voltage of the driver chip may be adjusted based on a pushing force required for the lens to move to a target position, so that the driver chip that controls the movement of the lens is not always at a high voltage. Alternatively, for a driver chip that controls a change in an aperture size, a drive voltage of the driver chip may be adjusted based on whether the aperture size changes, so that the driver chip that controls the change in the aperture size is not always at a high voltage. The method reduces power consumption of a camera module.