LED Light Source Modulation for Device Status Indication
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Solution Overview
Problem
Conventional light sources in electronic devices, such as LEDs, provide limited information through low-frequency blinking patterns, which are visible to humans but lack detail, while high-frequency patterns are not visible to humans but detectable by cameras, offering minimal data on device states and conditions.
Innovation Solution
Implementing dual-frequency modulation in light sources, where low frequencies create visible blinking patterns indicative of events and high frequencies, above 30 Hz, provide invisible patterns detectable by cameras, indicating specific parameters associated with events, allowing for more detailed information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If low-frequency blinking patterns are used for visible indication, then human visibility is improved, but information detail is insufficient
Solution Approach 1:
The indication system is segmented into two frequency domains: low-frequency visible blinking for basic event notification and high-frequency invisible blinking for detailed parameter transmission. This segmentation allows each frequency band to serve a specific informational purpose, resolving the contradiction between visibility and information detail.
Solution Approach 2:
The patent adds a temporal frequency dimension to the indication system. By modulating the light source at multiple frequency levels simultaneously, it transforms a single-dimensional visible indication into a multi-dimensional communication system where different frequencies carry different types of information.
2Loss of information
If high-frequency blinking patterns are used for detailed information, then information detail is improved, but human visibility is lost
Solution Approach 1:
The light source acts as an intermediary that simultaneously serves two functions: visible low-frequency blinking for human awareness and high-frequency invisible blinking for detailed data transmission. The high-frequency component, while invisible to humans, can be detected by cameras and optical sensors, enabling detailed information communication without sacrificing human visibility of the basic indication.
3Difficulty of detecting and measuring
If simple blinking patterns are used, then ease of detection is improved, but information specificity is insufficient
Solution Approach 1:
The system employs periodic blinking actions at distinct frequency intervals. The low-frequency periodic blinking provides easily detectable event notification, while the superimposed high-frequency periodic modulation encodes specific parameter information. This multi-level periodic action maintains ease of detection while significantly improving information specificity.
Data Source
AI summary
Methods and systems provide for modulating light sources in panel displays of devices, such as light emitting diodes (LEDs), to provide indications as to device performance. The modulations are at low and high frequencies. The low frequencies provide visible blinking patterns, indicative of an event in the device, and the high frequencies, provide non-visible blinking patterns, indicative of one or more parameters associated with the event.