Lighting Device Two-Wire Control Circuit
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Solution Overview
Problem
Existing lighting devices, such as LED strips, lack the ability to expand their functional scope while maintaining minimal space requirements and ease of use, particularly in terms of controlling color temperature and brightness across multiple segments.
Innovation Solution
A lighting device comprising a controller, two-wire transmission line, filter device, and microprocessor, where the controller generates control signals to switch on/off LED units with a time delay and adjust color temperature and brightness, using a voltage curve to transmit energy and control information via a two-wire line, allowing for uniform control of multiple LED units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate control lines are used for each LED unit to enable independent control of color temperature and brightness, then control precision and functionality are improved, but device complexity and installation space requirements increase
Solution Approach 1:
The patent applies a two-wire transmission system where the same two wires carry both power supply voltage and control signals for multiple LED units. Each LED unit includes a microprocessor that can interpret different control signals to independently adjust brightness and color temperature, enabling one transmission line to serve multiple functions and control multiple devices without requiring separate control lines for each LED unit.
Solution Approach 2:
The patent introduces microprocessors as intermediary devices at each LED unit that receive control signals through the two-wire transmission line, decode the control information, and independently adjust their own operation. This intermediary approach allows complex control functionality to be achieved without directly connecting multiple control lines to each LED unit, thereby reducing system complexity while maintaining versatility.
2Measurement precision
If separate control lines are provided for each LED unit, then control precision is improved, but the number of transmission lines and installation space requirements increase
Solution Approach 1:
The two-wire transmission system serves dual purposes: providing power supply voltage to multiple LED units and transmitting control signals for independent adjustment of brightness and color temperature. This multi-functional approach eliminates the need for separate control lines for each LED unit, reducing the total transmission line length and installation space while maintaining precise control capability through intelligent signal processing at each LED unit's microprocessor.
3Device complexity
If a two-wire transmission line is used to transmit both power and control signals, then device complexity is reduced, but the ability to transmit control information accurately is worsened
Solution Approach 1:
The microprocessor at each LED unit acts as an intermediary that receives the composite signal containing both power voltage and control information, separates and decodes the control signals, and independently determines the appropriate brightness and color temperature settings. This intermediary processing ensures accurate control information transmission despite the simplified two-wire configuration, preventing information loss while maintaining low system complexity.
Solution Approach 2:
The system implements feedback mechanisms where the microprocessor at each LED unit continuously monitors the received control signals and adjusts its operation accordingly. This feedback approach ensures that control information is accurately interpreted and executed, maintaining signal integrity and preventing information loss even though only two wires are used for both power and control functions.
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
Enables a wide range of lighting functions with minimal space, allowing for synchronized switching, color temperature, and brightness adjustments across multiple segments, enhancing usability and flexibility in various applications.
Implementation Method 1
Each LED unit (8) comprises at least one LED (10, 12). The LEDs of the lighting device are preferably arranged on the circuit board (4).
Implementation Method 2
the filter device separates the control signal from the DC voltage and transmits at least the DC voltage to at least one of the LED units and the separated control signal to the microprocessor
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The lighting device (2) according to the invention comprises a circuit board (4) with at least two light segments (6), each of which has at least one LED unit (8) comprising at least one LED (10, 12) for generating light. The lighting device also includes a controller (14) configured to generate different control signals (30) for controlling the LED units (8) of the light segments (6). The control signals (30) allow the controller (14) to switch the LED units (8) of different light segments (6) on and/or off with a time delay and to change the color temperature and/or the brightness of the generated light. The lighting device also includes a two-wire transmission line (16), at least one filter device (18), and at least one microprocessor (20).These components are designed such that, during operation, the transmission line (16) transmits a voltage waveform, which is a DC voltage (28) superimposed with at least one of the control signals (30) of the controller (14), to the filter device (18), the filter device separates the control signal (30) from the DC voltage (26) and transmits at least the DC voltage (26) to at least one of the LED units (8) and the separated control signal (30) to the microprocessor (20), which controls the LED unit (8) depending on the control signal (30).