Integrated Remote Control Receiver with Directional Signal Processing
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Solution Overview
Problem
Conventional remote control receivers with individual photodiodes in independent mold packages face challenges in size reduction and price reduction due to inefficiencies in signal processing and potential mis-recognition of non-objective remote control signals.
Innovation Solution
A remote control receiver design that incorporates multiple light-receiving regions within a single common mold package, featuring a first signal processing circuit for demodulating remote control signals and a second signal processing circuit for calculating directional signals, along with an external input terminal to control power supply and output paths, enhancing signal-to-noise ratio and preventing system malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple photodiodes are assembled in independent mold packages, then directional detection capability is achieved, but size and manufacturing cost increase
Solution Approach 1:
The patent combines multiple photodiodes (first and second photodiodes) into a single integrated mold package, creating a unified light-receiving unit that maintains directional detection capability while reducing overall receiver size and simplifying manufacturing compared to using separate packages for each photodiode
2Measurement precision
If multiple photodiodes are assembled in independent mold packages, then directional detection capability is achieved, but manufacturing cost increases
Solution Approach 1:
The patent integrates multiple photodiodes and their associated signal processing circuits into a single mold package, reducing the number of separate components that need to be manufactured, assembled, and tested, thereby lowering overall manufacturing cost while maintaining the directional detection function
3Reliability
If signals from multiple light-receiving regions are added up, then signal-to-noise ratio is improved, but directional information is lost
Solution Approach 1:
The patent divides the light-receiving function into multiple separate photodiodes (first and second photodiodes) within the same package, each processing its signal independently to maintain directional information, while the system architecture allows for selective signal combination to improve signal-to-noise ratio when directional data is not required
4Measurement precision
If second signal processing circuit is always powered, then directional signal detection is always available, but power consumption increases and system reliability decreases
Solution Approach 1:
The patent implements dynamic power management for the second signal processing circuit, enabling it to be switched between active and inactive states based on operational requirements, thereby reducing average power consumption while maintaining directional detection capability when needed
Solution Approach 2:
The system uses feedback control to monitor whether directional signal detection is required, and based on this feedback, dynamically adjusts the power state of the second signal processing circuit, optimizing the balance between detection availability and power consumption
5Measurement precision
If second signal processing circuit is always powered, then directional signal detection is always available, but system reliability decreases due to mis-recognition of non-objective signals
Solution Approach 1:
The patent implements dynamic activation of the second signal processing circuit, keeping it inactive by default and only activating it when genuine remote control signals are detected, thereby preventing mis-recognition of non-objective signals while maintaining detection capability when needed
Solution Approach 2:
The system takes preliminary anti-action by implementing validation mechanisms that prevent the second signal processing circuit from processing potentially erroneous signals, and by controlling its activation state to avoid generating directional signals from non-objective remote control signals
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 design achieves size and cost reductions while improving signal processing efficiency and preventing system malfunctions by accurately distinguishing between objective and non-objective remote control signals, ensuring reliable directional detection.
Implementation Method 1
at least a plurality of light-receiving regions for receiving remote control signals, respectively, in a form of incident light and performing photoelectric conversion of the signals
Data Source
AI summary
At least a plurality of light-receiving regions for receiving remote control signals, respectively, in a form of incident light and performing photoelectric conversion of the signals are provided in one common mold package. The remote control receiver includes a first signal processing circuit for adding up signals outputted by the plurality of light-receiving regions and, based on a resulting signal, demodulating and outputting the remote control signal. The remote control receiver also includes a second signal processing circuit for calculating a difference between the signals outputted by the plurality of light-receiving regions to obtain and output a directional signal representing a direction in which the incident light has been incident on the plurality of light-receiving regions.