LED Lighting Control via Pin Connection State
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Solution Overview
Problem
Existing LED lighting devices struggle to precisely control light intensity due to differences in LED light sources from various manufacturers, relying on simple analog methods that lack digital precision and reliability.
Innovation Solution
An LED lighting device with a light intensity control unit that adjusts the duty ratio of a light intensity control signal based on the connection time and electrical connection state of open-circuit voltage pins, using a pulse generation module and mode conversion module to switch between normal and light intensity control modes, ensuring consistent light output across different LED sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If simple analog control method is used, then device complexity is reduced, but light intensity control precision deteriorates
Solution Approach 1:
The patent applies parameter changes by switching between different control modes (normal mode and light intensity control mode) based on the connection state of open-circuit voltage pins. The light intensity control unit adjusts the duty ratio of the light intensity control signal according to the connection time and electrical connection state, enabling precise digital control while maintaining system simplicity through mode-based parameter adjustment.
2Adaptability or versatility
If LED light sources from different manufacturers are used, then adaptability is improved, but light intensity uniformity deteriorates
Solution Approach 1:
The patent implements feedback control by monitoring the connection state among open-circuit voltage pins and adjusting the light intensity control signal accordingly. The light intensity control unit detects the electrical connection state and connection time, then dynamically adjusts the duty ratio to compensate for variations in LED light sources from different manufacturers, ensuring uniform light intensity across diverse LED components.
3Measurement precision
If digital light intensity control mode is implemented, then control precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies self-service principle by enabling the system to automatically determine and switch between normal mode and light intensity control mode based on the connection state of open-circuit voltage pins. The light intensity control unit autonomously adjusts the duty ratio according to the detected connection time and electrical connection state, eliminating the need for manual mode selection and simplifying user operation while maintaining digital control precision.
Data Source
AI summary
An LED lighting device comprises an LED light source unit; a light intensity control unit configured to provide a light intensity control signal for controlling a light intensity through a plurality of steps in a light intensity control mode; and a light source driving unit configured to provide power to the LED light source unit according to the light intensity control signal.