Light Emitting Device Dynamic Color Temperature Control
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Solution Overview
Problem
Conventional lighting devices are unable to consistently generate light with a color temperature similar to natural light over time, limiting their ability to mimic the dynamic color changes of daylight.
Innovation Solution
A light emitting device equipped with a communication unit capable of receiving time information through different communication modes (Wi-Fi and Bluetooth) and a controller that adjusts the correlated color temperature of the light emitted based on this information, allowing it to mimic the color temperature of natural light at different times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional lighting devices use fixed color temperature light sources, then device complexity is reduced, but the ability to generate light with color temperature similar to natural light over time deteriorates
Solution Approach 1:
The lighting device dynamically adjusts the color temperature of emitted light based on time information received via communication protocols. The controller modifies the correlated color temperature (CCT) of the light emitter to match natural light characteristics at different times of day, transforming a static lighting system into an adaptive one that responds to temporal changes in natural lighting conditions.
Solution Approach 2:
The system changes the color temperature parameter of the emitted light from fixed to variable, adjusting the correlated color temperature (CCT) value based on time-of-day information. This parameter transformation allows the device to simulate natural light's spectral characteristics throughout the day, transitioning from warm white in evenings to cool white during daytime hours.
2Adaptability or versatility
If lighting devices use multiple communication modes for control, then adaptability and remote control capability are improved, but device complexity and power consumption increase
Solution Approach 1:
The lighting device incorporates multiple communication interfaces (Wi-Fi and Bluetooth) within a single communication unit, enabling it to function with different control protocols and devices. This multi-functional approach allows the same hardware to support both high-bandwidth Wi-Fi communication for cloud connectivity and low-power Bluetooth for direct device control, maximizing versatility while managing power requirements.
Solution Approach 2:
The communication unit acts as an intermediary that can operate in different communication modes depending on the situation. It mediates between the controller and external devices, selecting appropriate communication protocols (Wi-Fi or Bluetooth) based on power availability, distance, and control requirements, thereby reducing overall system power consumption while maintaining connectivity.
3Reliability
If lighting devices use multiple communication modes, then security is improved, but device complexity increases
Solution Approach 1:
The communication unit is designed with multi-functional capability to support both Wi-Fi and Bluetooth protocols, enabling secure communication through multiple channels. This dual-mode communication provides security benefits by allowing the system to use encrypted Wi-Fi for cloud connectivity and Bluetooth for authenticated device-to-device communication, thereby enhancing overall system security posture.
Solution Approach 2:
The communication unit serves as a secure intermediary between the controller and external devices, implementing protocol-specific security measures. It mediates data transmission by applying appropriate encryption and authentication methods for each communication mode, protecting against unauthorized access while managing the complexity of multiple security protocols through unified interface design.
Data Source
AI summary
A light emitting device includes: a light emitter for generating light; a communication unit that communicates externally through a first communication mode to receive time information and communicates externally through a second communication mode different from the first communication mode; and a controller for controlling a correlated color temperature of the light of the light emitter based on the time information. Further, the communication unit transmits the time information received using the first communication mode externally through the second communication mode.