Remote Control Pulse Pattern Reduces False Detection
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Solution Overview
Problem
Existing systems, such as those using CMOS sensors, face challenges in accurately distinguishing and tracking multiple remote control devices due to false detection issues when their signals overlap or are temporarily turned off, leading to incorrect allocation of labels and mistaken identity of devices.
Innovation Solution
A lighting device with a CMOS sensor that employs specific pulse patterns for remote control devices, including distinct first and second ON periods and an OFF period, along with consideration of detected areas and coordinate changes, to reduce false detection by ensuring unique identification and accurate tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a CMOS sensor is used to detect signals from multiple remote control devices, then the ability to track and illuminate multiple devices is improved, but false detection occurs when devices are temporarily turned off and relit, causing incorrect label allocation
Solution Approach 1:
The patent applies periodic action by using distinct first and second ON periods in the pulse pattern transmission. The sensor detects signals during these periodic intervals and uses the timing characteristics to distinguish between different remote control devices. This periodic structure allows the system to maintain reliable identification even when devices are temporarily turned off and relit, as each device's unique pulse timing pattern serves as an identifier that persists through OFF periods.
2Productivity
If labels are allocated to detected light sources based on detection order, then the system can track multiple devices, but label swapping occurs when devices are turned off and relit, causing mistaken identity
Solution Approach 1:
The patent implements feedback by continuously monitoring the pulse pattern characteristics of detected signals and using this information to verify and maintain correct label allocation. The sensor system compares the timing and pattern of incoming signals against known patterns from previously identified devices, providing feedback that prevents label swapping. When a device is relit after being OFF, the feedback mechanism recognizes the familiar pulse pattern and maintains the original label assignment rather than reassigning based on detection order.
Solution Approach 2:
The patent uses parameter changes by incorporating distinct first and second ON periods with specific timing relationships into the pulse pattern. These temporal parameters serve as unique identifiers for each remote control device. The sensor system measures these parameter values (timing intervals between ON periods) and uses them to distinguish between devices, ensuring accurate label allocation even when detection order changes due to devices being temporarily turned off.
3Speed
If the sensor continuously allocates labels to detected signals, then tracking responsiveness is improved, but false detection increases when signals from different devices overlap in time
Solution Approach 1:
The patent applies segmentation by dividing the pulse pattern into distinct first and second ON periods with an OFF period between them. This segmentation creates temporally separated signal segments that can be independently analyzed. When multiple remote control devices transmit signals, their segmented pulse patterns can be distinguished based on the timing and structure of these segments, reducing false detection while maintaining tracking responsiveness through the use of multiple detection opportunities within each pulse cycle.
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 proposed solution effectively reduces the likelihood of false detection by using unique pulse patterns and sensor configurations, ensuring reliable identification and tracking of remote control devices, even when signals overlap or devices are temporarily turned off.
Implementation Method 1
a case where signals transmitted by two remote control devices are detected by a CMOS sensor
Data Source
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AI summary
To provide a remote control device for transmitting a light signal having a pulse pattern capable of reducing the possibility of false detection, a communication device including the remote control device and a sensor, a variable device further including an appliance whose state varies by tracking the remote control device, and a lighting device further including a moving light for illuminating the remote control device by tracking the remote control device. The remote control device transits a light signal having a pulse pattern to be detected by a sensor, in which the pulse pattern includes a first ON period, a second ON period, and an OFF period between the first ON period and the second ON period, the first ON period and the second ON period being repeated alternately, the first ON period and the second ON period are more than twice as long as a sampling time T of the sensor, the first ON period and the second ON period are different from each other, and the OFF period is longer than the sampling time T.