LED Backlight Driver Interface for Cross-Vendor Voltage Control
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Solution Overview
Problem
The independent operation of power control units and light emitting diode drivers in modern LED backlight systems results in high customization requirements, making it difficult to meet actual needs due to differing feedback control methods and logic among different companies.
Innovation Solution
An electronic device with a power source, light source, and driver, incorporating a signal conversion circuit that converts disturbance signals from a feedback function pin into control voltages to dynamically adjust output voltage, allowing for unified control across different manufacturers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power control unit and light emitting diode driver are used independently, then power driving and current balancing functions are separated, but customization requirements increase and compatibility decreases
Solution Approach 1:
The patent introduces a signal conversion circuit as an intermediary component between the power control unit and LED driver. This circuit converts disturbance signals from the feedback function pin into control voltages, enabling standardized communication between independently manufactured components from different manufacturers, thus resolving the compatibility issue while maintaining functional separation
Solution Approach 2:
The signal conversion circuit serves multiple functions: it acts as a disturbance signal generator, converts signals between different formats, and provides a universal interface for connecting power control units and LED drivers from different manufacturers. This multi-functional design enables the system to work with various manufacturers' products without requiring custom matching
2Ease of operation
If different companies use different feedback control methods and logic, then independent product design is enabled, but peripheral parameter matching becomes complex and time-consuming
Solution Approach 1:
The signal conversion circuit serves as a universal mediator that standardizes the interface between power control units and LED drivers. By converting disturbance signals into control voltages through a standardized process, it eliminates the need for companies to manually calculate and match peripheral parameters, thus reducing time loss while preserving independent design freedom
Solution Approach 2:
The patent transforms the control interface by changing the signal parameters - converting disturbance signals from the feedback function pin into control voltages. This parameter transformation creates a standardized communication protocol that works across different manufacturers' products without requiring custom parameter matching
3Extent of automation
If signal conversion circuit converts disturbance signals to control voltages, then dynamic adjustment of light emission is enabled, but circuit complexity increases
Solution Approach 1:
The signal conversion circuit introduces a controlled level of complexity as an intermediary mechanism that enables dynamic adjustment. By adding this single conversion stage, the system gains automated dynamic control capability without requiring complex redesign of the entire power control or LED driving circuitry
Data Source
AI summary
An electronic device includes a power source, a light source and a driver. The power source includes a control signal end and an output end. The light source is electrically connected to the output end. The driver is electrically connected to the control signal end, and the driver includes: a signal source, and a signal conversion circuit. The signal conversion circuit is electrically connected to the signal source and the control signal end, wherein the signal conversion circuit includes a switch, the switch includes a control end, and the signal source is electrically connected to the control end of the switch.