Camera Module Clock Handover for Low-Noise Sleep Operation
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Solution Overview
Problem
Conventional camera modules generate shaking noise due to gaps inside the camera modules, leading to increased power consumption as the main processor continuously transfers clock signals to activate driving circuits for AF and OIS functions.
Innovation Solution
An electronic device with a first camera module, a sub-processor, and a main processor, where the main processor generates a clock signal and control signal to the sub-processor during sleep mode, allowing the sub-processor to manage clock signals to the camera module, reducing noise and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the main processor continuously transfers clock signals to activate driving circuits for AF and OIS functions, then lens vibrations are minimized and noise is reduced, but power consumption increases
Solution Approach 1:
The patent divides the processor into two separate units: a main processor and a sub-processor. The sub-processor specifically manages clock signal transmission to the camera module for AF and OIS operations, while the main processor handles other device functions. This segmentation allows the main processor to enter sleep mode and reduce power consumption while the sub-processor maintains necessary camera operations.
Solution Approach 2:
The sub-processor acts as an intermediary between the main processor and the camera module's driving circuits. It receives instructions from the main processor and manages the continuous transmission of clock signals to maintain AF and OIS functions without requiring the main processor to remain active, thus reducing overall power consumption while preventing noise.
2Use of energy by moving object
If the main processor maintains a sleep state to reduce power consumption, then energy efficiency improves, but the ability to directly manage clock signals for camera operations is reduced
Solution Approach 1:
The processing functions are segmented between main processor and sub-processor. The sub-processor is specifically designated to handle camera module control tasks including clock signal generation and transmission, while the main processor handles high-level device management. This allows the main processor to sleep while camera operations continue.
Solution Approach 2:
The sub-processor is designed to autonomously manage clock signal transmission to the camera module without requiring continuous intervention from the main processor. Once activated by the main processor, the sub-processor independently maintains the necessary operations for AF and OIS functions.
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 reduces lens vibrations and noise generation by maintaining the main processor in a sleep state while the sub-processor manages clock signals, thereby minimizing power consumption.
Implementation Method 1
at least one magnet fixed to the lens assembly, at least one coil disposed to face the at least one magnet, and a driving circuit controlling a current applied to the at least one coil
Data Source
AI summary
An electronic device according to an embodiment may include a first camera module including a first driving circuit, a sub processor, and a main processor functionally connected to the first camera module and the sub processor, wherein the main processor is configured to generate a first clock signal and transmit the same to the first camera module while a first camera included in the first camera module is in an activated state, transmit a first control signal to the sub processor in response to occurrence of a predetermined event in a sleep state, and the sub processor is configured to generate a second clock signal and transmit the same to the first camera module while the main processor is in a sleep state in response to receipt of the first control signal. In addition to this, various embodiments identified thorough the specification are possible.