Remote Control Device Using Granulated Optical Signal Identification
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Solution Overview
Problem
Existing remote-control systems for multiple user devices are inefficient due to the need for multiple controllers and the inability to efficiently identify and control devices of the same type, leading to user frustration and complexity.
Innovation Solution
A remote-control device with a directional optical sensor and processor that analyzes optical signals with high and low signal states, using granulated signal lengths to efficiently identify user devices, allowing for faster and more accurate control of multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the low signal states have minimum duration (three times receiver clock rate) to accommodate slow receiver clock rate, then proper detection is achieved, but the signal transmission time becomes relatively long
Solution Approach 1:
The patent applies dynamics by making the signal encoding flexible and adaptive. Instead of fixed-duration signal states, the system uses variable-length encoding where signal fragments can be dynamically adjusted in duration based on the receiver's clock rate capabilities. This allows the transmitter to optimize signal length for faster reception while ensuring the receiver can still properly detect and decode the variable-length fragments according to its sampling rate.
Solution Approach 2:
The patent changes the parameter of signal duration from a fixed minimum (three times receiver clock rate) to a variable parameter. The system transmits identification codes using signal fragments with adaptable lengths, allowing shorter durations for faster transmission while maintaining detection reliability through synchronized sampling at the receiver end. This parameter change directly reduces signal transmission time while preserving reliable device identification.
2Measurement precision
If multiple remote-control devices are used to control different user devices, then each device can be controlled specifically, but the system complexity and user burden increase
Solution Approach 1:
The patent implements universality by enabling a single remote-control device to identify and control multiple different user devices. The system transmits identification codes from each user device that the remote controller can detect and decode to determine which device is being pointed at. This allows one universal remote to replace multiple device-specific remotes, reducing system complexity while maintaining precise device identification through optical signal transmission and code recognition.
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 efficient identification and control of multiple user devices by reducing the time required for signal transmission and improving code efficiency, allowing for seamless operation of various devices with reduced user complexity.
Implementation Method 1
a directional optical sensor for receiving one or more optical signals from the user devices
Data Source
AI summary
The invention is directed at a remote-control device for controlling one or more user devices, comprising a directional optical sensor for receiving one or more optical signals from the user devices. Each optical signal encodes a device identifier by high and low signal states in periods having granulated lengths. Each granulated length is an integer number of clock periods of a transmitter clock. The transmitter clock has a clock ratio to the predetermined receiver clock, the clock ratio being a number larger than one. At least one granulated length is longer than an integer number of clock periods of the predetermined receiver clock by a fraction of the clock period of the predetermined receiver clock, which granulated length may be detected by an asynchronous receiver clock and a detection range having only two values.