Camera Module Driver IC Interface Using Signal-Powered Inversion
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Solution Overview
Problem
Existing camera module driving ICs face challenges in reducing power consumption and miniaturization while maintaining efficient operation and stability, particularly due to varying voltage levels from external elements.
Innovation Solution
The camera module driving apparatus incorporates a bridge-structured driver and an interface that uses self-generated power from communication signals, separate from the main IC power, to maintain efficient operation and reduce power consumption, along with a digital controller and additional power generator to stabilize operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inverter is electrically connected to the power port to receive IC power, then the inverter can operate stably, but the power consumption of the IC increases and miniaturization becomes difficult
Solution Approach 1:
The inverter is configured to operate using self-generated power from the communication signal rather than drawing power from the power port. The communication signal itself provides the voltage difference needed for the inverter to function, making the system self-sufficient for this particular component and eliminating additional power consumption from the IC's power supply.
2Adaptability or versatility
If more power ports are added to support varying voltage levels from external elements, then the IC can handle different voltage conditions, but the IC size increases and miniaturization is hindered
Solution Approach 1:
The communication port is designed to receive communication signals with varying voltage levels from multiple external elements (processor, image sensor, gyro sensor) without requiring separate power ports for each voltage level. The inverter adapts to different voltage conditions using the communication signal itself, making the interface universally compatible with various external devices while maintaining a compact IC structure.
3Reliability
If the inverter operates based on voltage difference from power port, then the operation is stable, but the IC becomes more complex and miniaturization is difficult
Solution Approach 1:
The inverter is extracted from the main power supply system and configured to operate independently using the communication signal. By separating the inverter's power source from the IC's power port, the design simplifies the overall IC structure while maintaining stable operation of the inverter function through the voltage difference inherent in the communication signal.
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
This approach reduces power consumption, minimizes the need for additional power ports, and allows for miniaturization of the IC, while ensuring stable operation and flexibility in responding to varying voltage levels from external elements.
Implementation Method 1
an inverter including a high-voltage terminal, a low-voltage terminal, and an input terminal and configured to operate based on a voltage difference between the high-voltage terminal and the low-voltage terminal, and to invert at least a portion of the communication signal input from the input terminal
Implementation Method 2
The high-voltage terminal and the low-voltage terminal of the inverter are electrically connected to both ends of a capacitor, respectively
Implementation Method 3
an input semiconductor circuit element configured to pass current from the input terminal of the inverter to the high-voltage terminal and to cut off the current from the high-voltage terminal to the input terminal
Implementation Method 4
a driver configured to output a driving current through the driving port in the camera module driving IC and including driving semiconductor circuit elements coupled in a bridge structure
Data Source
AI summary
A camera module driving apparatus includes: a camera module driving IC including a communication port and a driving port; an interface to receive a communication signal through the communication port; and a driver to output a driving current through the driving port and including driving semiconductor circuit elements coupled in a bridge structure. The interface includes an inverter including a high-voltage terminal, a low-voltage terminal, and an input terminal and operating based on a voltage difference between the high-voltage terminal and the low-voltage terminal, and inverting at least a portion of the communication signal; and an input semiconductor circuit element passing current from the input terminal to the high-voltage terminal and cutting-off the current from the high-voltage terminal to the input terminal. The high-voltage terminal and the low-voltage terminal of the inverter are electrically connected to both ends of a capacitor, respectively.